Disclosure of Invention
The invention mainly aims to provide a power supply switching circuit of an outdoor camera and the outdoor camera, aiming at
In order to achieve the above object, the present invention provides a power switching circuit for an outdoor camera, comprising:
a power supply output terminal;
At least two batteries respectively and electrically connected with the power supply output end;
The input end of the detection circuit is connected with the output end of the battery, and the detection circuit is used for detecting the electric quantity of each battery and outputting a corresponding electric quantity signal;
the control end of the battery gating circuit is connected with the output end of the detection circuit, the output end of the battery gating circuit is connected with the controlled end of the battery, and the battery gating circuit is used for driving at least one corresponding battery to be electrically connected with the power output end according to the electric quantity signal.
In one embodiment, the battery comprises a lithium battery, a storage battery, or a dry cell;
The detection circuit includes:
The input end of the first detection circuit is connected with the output end of the lithium battery, the output end of the first detection circuit is connected with the first input end of the battery gating circuit, and the first detection circuit is used for detecting the electric quantity of the lithium battery and outputting a corresponding electric quantity signal of the lithium battery;
the input end of the second detection circuit is connected with the output end of the storage battery, the output end of the second detection circuit is connected with the second input end of the battery gating circuit, and the second detection circuit is used for detecting the electric quantity of the storage battery and outputting a corresponding electric quantity signal of the storage battery.
In one embodiment, the first detection circuit includes:
The battery gating circuit comprises a first comparison chip, wherein a first resistor is connected between the inverting end of the first comparison chip and the output end of the lithium battery, at least one capacitor is connected between the inverting end of the first comparison chip and the ground, at least one resistor is connected between the inverting end of the first comparison chip and the ground, a second resistor is connected between the inverting end of the first comparison chip and the output end of the first comparison chip, and the output end of the first comparison chip is connected with the first input end of the battery gating circuit;
the second detection circuit includes:
The second comparison chip is connected in parallel with at least one resistor between the inverting end of the second comparison chip and the output end of the storage battery, at least one capacitor is connected between the inverting end of the second comparison chip and the ground, at least one resistor is connected between the inverting end of the second comparison chip and the ground, a third resistor is connected between the non-inverting end of the second comparison chip and the output end of the second comparison chip, and the output end of the second comparison chip is connected with the second input end of the battery gating circuit;
and the first end of the fourth resistor is connected with the same-phase end of the second comparison chip.
In one embodiment, the battery gating circuit includes:
The input end of the driving circuit is connected with the output end of the detection circuit, and the driving circuit is used for outputting a corresponding driving signal according to the electric quantity signal;
The control end of the switch circuit is connected with the output end of the driving circuit, the controlled end of the switch circuit is connected with the battery, and the switch circuit is used for controlling the corresponding battery to be turned on or off according to the driving signal.
In one embodiment, the driving circuit includes:
The control end of the first switching element is connected with the output end of the first comparison chip, and the second conducting end of the first switching element is grounded;
The control end of the second switching element is connected with the first conduction end of the first switching element, the first conduction end of the second switching element is connected with the first control end of the switching circuit, and the second conduction end of the second switching element is grounded;
The control end of the third switching element is connected with the output end of the first comparison chip, and the second conducting end of the third switching element is grounded;
The control end of the fourth switching element is connected with the output end of the second comparison chip, and the second conducting end of the fourth switching element is grounded;
a fifth switching element, wherein a control end of the fifth switching element is connected with a first conducting end of the fourth switching element, a first conducting end of the fifth switching element is connected with a second control end of the switching circuit, and a second conducting end of the fifth switching element is connected with a first conducting end of the third switching element;
The control end of the sixth switching element is connected with the output end of the second comparison chip, the first conducting end of the sixth switching element is connected with the third control end of the switching circuit, and the second conducting end of the sixth switching element is connected with the first conducting end of the third switching element.
In one embodiment, the switching circuit includes:
A first conducting end of the seventh switching element is connected with the output end of the lithium battery, a control end of the seventh switching element is connected with the first conducting end of the second switching element, and a fifth resistor is connected between the control end of the seventh switching element and the second conducting end;
an eighth switching element, a first conducting end of which is connected to a second conducting end of the seventh switching element, and a control end of which is connected to a first conducting end of the second switching element;
a ninth switching element, a first conducting end of which is connected with the output end of the storage battery, a control end of which is connected with the first conducting end of the fourth switching element, and a sixth resistor connected between the control end and the second conducting end of the ninth switching element;
A tenth switching element, wherein a first conducting end of the tenth switching element is connected with a second conducting end of the ninth switching element, and a control end of the tenth switching element is connected with the first conducting end of the fourth switching element;
An eleventh switching element, wherein a first conducting end of the eleventh switching element is connected with the output end of the dry battery, a control end of the eleventh switching element is connected with the first conducting end of the sixth switching element, and a seventh resistor is connected between the control end and the second conducting end of the eleventh switching element;
and a twelfth switching element, wherein a first conducting end of the twelfth switching element is connected with a second conducting end of the eleventh switching element, a control end of the twelfth switching element is connected with the first conducting end of the sixth switching element, at least one capacitor is connected between the second conducting end of the twelfth switching element and the ground, and the second conducting end of the twelfth switching element is connected with the second conducting end of the tenth switching element.
In an embodiment, further comprising:
The input end of the starting circuit is connected with the battery, and the starting circuit is used for supplying power to the detection circuit and the battery gating circuit;
The power-on circuit includes:
The starting control circuit is used for reducing the voltage input by the battery and outputting the reduced power supply to the detection circuit and the battery gating circuit;
and the input end of the starting power supply circuit is connected with the battery, and the output end of the starting power supply circuit is connected with the input end of the starting control circuit.
In one embodiment, the power-on control circuit includes:
The third end of the toggle switch is grounded, and an eighth resistor is connected between the first end of the toggle switch and the output end of the starting power supply circuit;
a thirteenth switching element, wherein the control end of the thirteenth switching element is connected with the second end of the toggle switch, and the second conduction end of the thirteenth switching element is connected with the output end of the power-on power supply circuit;
the power input end of the voltage reduction chip is connected with the first conducting end of the thirteenth switching element, at least one capacitor is connected between the power input end of the voltage reduction chip and the ground, at least one capacitor is connected between the output end of the voltage reduction chip and the ground, and the output end of the voltage reduction chip outputs voltage to supply power for the detection circuit and the battery gating circuit.
In one embodiment, the power-on power circuit includes:
the positive electrode of the first diode is connected with the first output end of the battery;
The anode of the second diode is connected with the second output end of the battery;
the positive electrode of the third diode is connected with the third output end of the battery;
The cathode of the first diode, the cathode of the second diode and the cathode of the third diode are connected together and output voltage to the input end of the startup control circuit.
In addition, in order to achieve the above object, the present invention also proposes an outdoor camera including the power switching circuit of the outdoor camera as described above.
According to the technical scheme, the detection circuit is connected with the battery, so that the electric quantity of the battery is detected, a corresponding electric quantity signal is output, the battery gating circuit is respectively connected with the detection circuit and the battery, the corresponding battery is driven to be turned on or off according to the electric quantity signal, the low-power-consumption power supply priority control and switching are realized by adopting a full hardware circuit mode, and the shutdown to zero power consumption is really realized.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" and/or "are used throughout, the meaning includes three parallel schemes, for example," a and/or B "including a scheme, or B scheme, or a scheme where a and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The application provides a power supply switching circuit of an outdoor camera, which is used in an outdoor power-grid-free environment, and can realize power supply priority control on a plurality of batteries of different types, so that the outdoor camera is ensured to continuously operate in a low-power-consumption mode under the condition of outdoor power-grid-free, and the battery endurance can be effectively improved.
Referring to fig. 1, in an embodiment of the invention, the power switching circuit of the outdoor camera includes a power output terminal, at least two batteries 100, a detection circuit 200, and a battery gating circuit 300, wherein:
The at least two batteries 100 are respectively and electrically connected with the power output end, the input end of the detection circuit 200 is connected with the output end of the battery 100, and the detection circuit 200 is used for detecting the electric quantity of each battery 100 and outputting a corresponding electric quantity signal; the control end of the battery gating circuit 300 is connected with the output end of the detection circuit 200, the output end of the battery gating circuit 300 is connected with the control end of the battery 100, and the battery gating circuit 300 is used for driving at least one corresponding battery to be electrically connected with the power output end according to the electric quantity signal.
In the present embodiment, the battery 100 may include one or more combinations of the storage battery 120, the lithium battery 110, or the dry battery, and the detection circuit 200 may include a voltage detection circuit 200 or a current detection circuit 200, etc., for detecting the charge condition of the battery 100 in real time. The battery gating circuit 300 controls the on/off of the battery 100 by controlling the on/off of the switching element according to the power signal output from the detection circuit 200. The power supply switching circuit can realize low-power-consumption power supply priority control and switching, effectively prolong the service time of an outdoor camera, simultaneously ensure that other batteries 100 can be automatically switched to supply power when the electric quantity is insufficient, and avoid data loss or equipment damage caused by sudden power failure. The power output end can be the output interface of each battery, can be through being equipped with switching element such as MOS pipe, triode etc. on the battery 100 to realize the switch on control to the battery, and the power output end is through being connected to the switching element's that is equipped with on the battery 100 one turn-on, and the switching element another turn-on is connected to the battery, and a battery is equipped with a corresponding switching element to realize the output of control different batteries, simultaneously, the power output end is connected to the power input port of outdoor camera for provide stable power supply for outdoor camera.
In this embodiment, taking the voltage detection circuit 200 as an example, when detecting that the voltage of a certain battery 100 is lower than a preset threshold, the detection circuit 200 outputs a low level signal to the battery gating circuit 300. Upon receiving this signal, the battery gating circuit 300 controls the corresponding switching element to be turned off, thereby cutting off the power supply of the battery 100. Meanwhile, the battery gating circuit 300 checks the charge condition of the other batteries 100, and if there is a battery 100 with sufficient charge, controls the corresponding switching element to be turned on and switches it to the power supply state. By the mode, automatic power supply switching and power supply priority control can be realized, and the outdoor camera can work stably and reliably in a complex environment.
In this embodiment, by setting multiple power supply priority modes, a user may select different power supply sequences and switching strategies according to actual needs, so as to meet different usage scenarios and requirements. For example, when shooting outdoors for a long time, the battery 120 may be selected to be preferentially used for power supply to ensure maximization of shooting duration; when rapid charging or battery 100 replacement is desired, the lithium battery 110 may be selected for power supply with priority, taking advantage of its high energy density and rapid charging characteristics. In addition, the efficiency and stability of power supply switching can be further optimized by setting parameters such as an electric quantity threshold value and delay time.
In this embodiment, the detection circuit 200 is connected with the battery 100 to detect the electric quantity of the battery 100 and output a corresponding electric quantity signal, and the battery gating circuit 300 is respectively connected with the detection circuit 200 and the battery 100 to drive the corresponding battery 100 to be turned on or off according to the electric quantity signal, so as to realize low-power-consumption power supply priority control and switching by adopting a full hardware circuit mode and truly realize shutdown to zero power consumption
Further, referring to fig. 2 in combination, another embodiment of the present invention provides a power switching circuit for an outdoor camera, and the battery 100 includes a lithium battery 110, a storage battery 120, or a dry cell based on the embodiment shown in fig. 1; the detection circuit 200 includes a first detection circuit 210 and a second detection circuit 220, wherein:
the input end of the first detection circuit 210 is connected to the output end of the lithium battery 110, the output end of the first detection circuit 210 is connected to the first input end of the battery gating circuit 300, and the first detection circuit 210 is configured to detect the electric quantity of the lithium battery 110 and output a corresponding electric quantity signal of the lithium battery 110; the input end of the second detection circuit 220 is connected to the output end of the storage battery 120, the output end of the second detection circuit 220 is connected to the second input end of the battery gating circuit 300, and the second detection circuit 220 is configured to detect the electric quantity of the storage battery 120 and output a corresponding electric quantity signal of the storage battery 120.
In the present embodiment, the first detection circuit 210 is dedicated to detecting the electric quantity of the lithium battery 110, and the second detection circuit 220 is dedicated to detecting the electric quantity of the storage battery 120. In this way, it is possible to perform accurate power detection for different types of batteries 100, respectively, and output corresponding power signals. By providing the first detection circuit 210 and the second detection circuit 220, respectively, it is possible to ensure more accurate and reliable detection of the amount of electricity for each battery 100 type, and to avoid detection errors due to differences in the battery 100 types. Meanwhile, the design also enables the power supply switching circuit to be more flexible and expandable, and the detection circuit 200 of the specific type of battery 100 can be added or deleted according to the needs so as to adapt to different use scenes and requirements.
Specifically, the first detection circuit 210 and the second detection circuit 220 may include a voltage detection circuit 200 or a current detection circuit 200, or the like. For the lithium battery 110, since the voltage range thereof is generally stable, the amount of electricity thereof can be detected by the voltage detection circuit 200. In contrast, for the battery 120, since the voltage range thereof may fluctuate with the variation of the electric quantity, it may be necessary to more accurately judge the electric quantity condition thereof in combination with the current detection circuit 200. By designing the detection circuits 200 for different battery 100 types, respectively, accurate power information can be ensured to be obtained under various use scenarios, and reliable data support is provided for subsequent power supply switching and power supply priority control.
In addition, the battery gating circuit 300 may control the on or off of the lithium battery 110 and the storage battery 120 according to the received power signal of the lithium battery 110 and the power signal of the storage battery 120 in combination with a preset power supply priority and switching strategy. For example, when the lithium battery 110 is sufficiently charged, the lithium battery 110 may be preferentially used for power supply; when the lithium battery 110 is in a shortage, the power supply of the storage battery 120 is automatically switched. In this way, the advantages of various batteries 100 can be fully utilized, and efficient and stable power management can be achieved.
It should be noted that, in practical applications, the detection circuit 200 for other types of batteries 100, such as dry batteries, may also be added according to specific requirements. Meanwhile, the power supply priority and the switching strategy can be adjusted according to actual requirements so as to meet the use requirements in different scenes.
The detection circuits 200 for the lithium battery 110 and the storage battery 120 are respectively arranged in the embodiment, so that the accurate detection of the electric quantity of the batteries 100 of different types can be realized, the accuracy and the reliability of power supply switching are improved, the power supply management is more flexible and efficient, and the service life and the stability of the outdoor camera are prolonged.
Referring to fig. 6 in combination, further, a further embodiment of the present invention provides a power switching circuit of an outdoor camera, based on the embodiment shown in fig. 2, the first detection circuit 210 includes a first comparison chip U1, where:
The first resistor R7 is connected between the inverting terminal of the first comparison chip U1 and the output terminal of the lithium battery 110, at least one capacitor is connected between the inverting terminal of the first comparison chip U1 and the ground, at least one resistor is connected between the inverting terminal of the first comparison chip U1 and the ground, the second resistor R8 is connected between the non-inverting terminal of the first comparison chip U1 and the output terminal of the first comparison chip U1, and the output terminal of the first comparison chip U1 is connected with the first input terminal of the battery gating circuit 300.
In this embodiment, the first comparing chip U1 may be a high-precision comparator for comparing the voltage of the lithium battery 110 with a preset threshold value, so as to output a corresponding power signal. The ninth resistor R6 and the first resistor R7 form voltage division detection of the electric quantity of the lithium battery, the capacitor C1 is used for filtering, the tenth resistor R9 is used for limiting current, and the first comparison chip U1 is protected from being damaged by excessive current. The second resistor R8 is used for feedback, prevents circuit oscillation and ensures stable output signal state.
In this embodiment, by reasonably setting the parameters of the resistor, the capacitor and the comparison chip, accurate detection of the electric quantity of the lithium battery 110 can be achieved, and a stable electric quantity signal can be output. When the voltage of the lithium battery 110 is lower than the preset threshold, the first comparison chip U1 outputs a low level signal to the battery gating circuit 300 to trigger the power switching operation. On the contrary, when the electric quantity of the lithium battery 110 is sufficient, the first comparison chip U1 outputs a high-level signal to maintain the normal power supply state of the lithium battery 110.
The detection circuit 200 based on the comparison chip has the advantages of simple structure, low cost, high reliability and the like, and is suitable for electronic equipment such as outdoor cameras and the like which need to stably work for a long time. Meanwhile, due to the adoption of the design mode of the full hardware circuit, the control and switching of the power supply priority with low power consumption can be realized, and the outdoor camera can work stably and reliably in various complex environments.
It should be noted that in practical application, parameters of the resistor, the capacitor and the comparison chip may be adjusted according to specific requirements, so as to adapt to different types of lithium batteries 110 and different usage scenarios. In addition, other types of detection circuits 200, such as current detection circuit 200, may be combined to further improve the accuracy and reliability of power switching.
In the embodiment, the comparison chip is adopted to detect the electric quantity of the lithium battery 110, and other circuit elements are combined to realize stable electric quantity signal output, so that the design mode not only improves the accuracy and reliability of power supply switching, but also reduces the complexity and cost of the whole circuit, and is beneficial to realizing long-term stable operation of an outdoor camera.
In this embodiment, the second detection circuit 220 includes a second comparison chip U2 and a fourth resistor R11, where:
At least one resistor is connected in parallel between the inverting terminal of the second comparison chip U2 and the output terminal of the storage battery 120, at least one capacitor is connected between the inverting terminal of the second comparison chip U2 and the ground, at least one resistor is connected between the inverting terminal of the second comparison chip U2 and the ground, a third resistor R18 is connected between the non-inverting terminal of the second comparison chip U2 and the output terminal of the second comparison chip U2, and the output terminal of the second comparison chip U2 is connected with the second input terminal of the battery gating circuit 300; the first end of the fourth resistor R11 is connected to the non-inverting end of the second comparison chip U2.
In the present embodiment, the second detection circuit 220 is similar to the first detection circuit 210 in design, and a comparison chip is also used for detecting the electric quantity. In contrast, the second detection circuit 220 mainly detects the amount of electricity of the battery 120, and thus needs to consider the case where the voltage range of the battery 120 may fluctuate with the change of the amount of electricity. Therefore, in the second detection circuit 220, a plurality of resistors may need to be connected in parallel to the inverting terminal of the comparison chip to achieve accurate detection of different voltage ranges.
In addition, in order to further improve the detection accuracy and stability, the second detection circuit 220 also uses a capacitor and a resistor for filtering and current limiting. The elements can effectively eliminate noise and interference in the voltage signals, and ensure that the comparison chip can output accurate electric quantity signals. In a specific implementation, when the voltage of the storage battery 120 is lower than the preset threshold, the second comparing chip U2 outputs a low level signal to the battery gating circuit 300 to trigger the power switching operation. On the contrary, when the electric quantity of the storage battery 120 is sufficient, the second comparison chip U2 outputs a high-level signal to maintain the normal power supply state of the storage battery 120.
By this design, the second detection circuit 220 can accurately detect the electric quantity of the storage battery 120, and cooperates with the first detection circuit 210 to provide a reliable electric quantity signal for the power supply switching circuit. This helps ensure that the outdoor camera can obtain stable power supply in various use situations, thereby prolonging the use period and improving the stability.
It should be noted that in practical applications, parameters of the resistor, the capacitor and the comparison chip are also required to be adjusted according to specific requirements, so as to adapt to different types of storage batteries 120 and different usage scenarios. In addition, other types of detection circuits 200 or sensors, such as temperature sensors, can be combined to further optimize power management and switching strategies, improving overall performance and reliability of the outdoor camera.
Still further, referring to fig. 3, a power switching circuit of an outdoor camera is provided according to still another embodiment of the present invention, based on the embodiment shown in fig. 6, the battery gating circuit 300 includes a driving circuit 310 and a switching circuit 320, wherein:
The input end of the driving circuit 310 is connected with the output end of the detection circuit 200, and the driving circuit 310 is configured to output a corresponding driving signal according to the electric quantity signal; the control end of the switch circuit 320 is connected to the output end of the driving circuit 310, the controlled end of the switch circuit 320 is connected to the battery 100, and the switch circuit 320 is configured to control the corresponding battery 100 to be turned on or off according to the driving signal.
In this embodiment, the driving circuit 310 may be a circuit composed of a logic gate circuit, a switch control element, a microcontroller, etc. for receiving the power signal from the detecting circuit 200 and outputting a corresponding driving signal according to a preset logic rule. The driving signal may be a high level or low level signal for controlling the on or off state of the switching circuit 320. The switching circuit 320 is a circuit composed of switching elements (such as a relay, a MOSFET, etc.), and the switching circuit 320 is used to control the on or off of the battery 100 according to the driving signal. In one implementation, when the driving signal is at a high level, the switch circuit 320 connects the corresponding battery 100 to the circuit to supply power to the outdoor camera; when the driving signal is at a low level, the switch circuit 320 turns off the corresponding battery 100 to stop the power supply, and vice versa.
Through the design mode, the power supply switching circuit can realize automatic switching of different power supplies, and stable power supply of the outdoor camera can be ensured under various use scenes. Meanwhile, due to the adoption of the design mode of the all-hardware circuit, the power supply switching circuit has the advantages of high response speed, high reliability and the like, and can meet the severe requirements of an outdoor camera on power supply management.
In practical applications, the specific implementation of the driving circuit 310 and the switching circuit 320 may be selected and adjusted according to the actual requirements. For example, the switching circuit 320 may select a switching element suitable for high current and high voltage to ensure the reliability and safety of the power switching.
The power switching circuit of the outdoor camera provided in this embodiment detects the electric quantity of the lithium battery 110 and the storage battery 120 by using the detection circuit 200, and outputs a corresponding electric quantity signal according to the detection result; and then, the drive circuit 310 and the switch circuit 320 are utilized to control the on/off of different power supplies according to the electric quantity signals, so that the automatic switching of the different power supplies is realized, the severe requirements of the outdoor camera on power supply management can be met, and the stability and the service life of the outdoor camera are improved.
Further, referring to fig. 6 in combination, a further embodiment of the present invention provides a power switching circuit for an outdoor camera, based on the embodiment shown in fig. 3, the driving circuit 310 includes a first switching element Q10, a second switching element Q7, a third switching element Q11, a fourth switching element Q12, a fifth switching element Q8, and a sixth switching element Q9, wherein:
The control end of the first switching element Q10 is connected with the output end of the first comparison chip U1, and the second conducting end of the first switching element Q10 is grounded; the control end of the second switching element Q7 is connected to the first conducting end of the first switching element Q10, the first conducting end of the second switching element Q7 is connected to the first control end of the switching circuit 320, and the second conducting end of the second switching element Q7 is grounded; the control end of the third switching element Q11 is connected with the output end of the first comparison chip U1, and the second conducting end of the third switching element Q11 is grounded; the control end of the fourth switching element Q12 is connected with the output end of the second comparison chip U2, and the second conducting end of the fourth switching element Q12 is grounded; the control end of the fifth switching element Q8 is connected to the first conducting end of the fourth switching element Q12, the first conducting end of the fifth switching element Q8 is connected to the second control end of the switching circuit 320, and the second conducting end of the fifth switching element Q8 is connected to the first conducting end of the third switching element Q11; the control terminal of the sixth switching element Q9 is connected to the output terminal of the second comparison chip U2, the first conducting terminal of the sixth switching element Q9 is connected to the third control terminal of the switching circuit 320, and the second conducting terminal of the sixth switching element Q9 is connected to the first conducting terminal of the third switching element Q11.
In this embodiment, the first switching element Q10, the second switching element Q7, the third switching element Q11, the fourth switching element Q12, the fifth switching element Q8, and the sixth switching element Q9 may be one having a relatively strong controllability, such as a MOS transistor, a transistor, or a relay, wherein the control terminal of the first switching element Q10 receives the power signal from the first comparison chip U1. When the first comparison chip U1 detects that the electric quantity of the lithium battery 110 is lower than the preset threshold, a high-level signal is output to turn on the first switching element Q10, and at this time, the control signal of the second switching element Q7 is at a low level, so that the second switching element Q7 is not turned on, and the first control end of the switching circuit 320 loses the control signal, thereby cutting off the power supply of the lithium battery 110. On the contrary, when the electric quantity of the lithium battery 110 is sufficient, the first comparison chip U1 outputs a low-level signal, so that the first switching element Q10 is not turned on, and the control end of the second switching element Q7 receives a high-level signal, so as to control the first control end of the switching circuit 320 to be turned on, and the lithium battery 110 supplies power to the outdoor camera.
In this embodiment, the control terminal of the third switching element Q11 also receives the power signal from the first comparing chip U1. In contrast, when the first comparison chip U1 outputs a low level signal, the third switching element Q11 is not turned on, and neither the fifth switching element Q8 nor the sixth switching element Q9 is turned on. When the first comparison chip U1 outputs a high-level signal, the third switching element Q11 is turned on, so that the source of the fifth switching element Q8 and the source of the sixth switching element Q9 are in a low-level state, and the gate of the fifth switching element Q8 and the gate of the sixth switching element Q9 control the on states according to the respective corresponding level control signals.
In this embodiment, the control terminal of the fourth switching element Q12 receives the power signal from the second comparing chip U2. When the second comparing chip U2 detects that the electric quantity of the storage battery 120 is lower than the preset threshold, a high-level signal is output to turn on the fourth switching element Q12 and turn off the control signal of the fifth switching element Q8, so that the second control end of the switching circuit 320 loses the control signal, and the power supply of the storage battery 120 is turned off. Meanwhile, since the third switching element Q11 is in the closed state at this time, the control terminal of the sixth switching element Q9 also receives the high level signal, so as to turn on the third control terminal of the switching circuit 320, so that the dry battery supplies power to the outdoor camera. On the contrary, when the electric quantity of the storage battery 120 is sufficient, the second comparing chip U2 outputs a high-level signal, so that the fourth switching element Q12 is not turned on, and further, the control end of the fifth switching element Q8 and the control end of the sixth switching element Q9 receive the high-level signal, so that the second control end of the control switching circuit 320 is turned on, and the third control end of the switching circuit 320 is not turned on, so that the storage battery 120 supplies power to the outdoor camera.
Through the above design manner, the driving circuit 310 can accurately detect the electric quantity of the lithium battery 110 and the storage battery 120, and output corresponding driving signals according to the detection result, so as to control the switching circuit 320 to switch on or off different power supplies. The design mode has the advantages of high response speed, high reliability and the like, and can meet the severe requirements of the outdoor camera on power management.
It should be noted that in practical applications, the specific types and parameters of the switching elements need to be selected and adjusted according to the actual requirements and circuit characteristics, so as to ensure the stability and reliability of the power switching circuit. Meanwhile, the power consumption and heat dissipation of the circuit are also required to be considered, so that performance degradation or damage caused by overlarge power consumption or poor heat dissipation is avoided.
In the embodiment, the detection circuit 200 is adopted to detect the electric quantity of the lithium battery 110 and the storage battery 120, and corresponding electric quantity signals are output according to the detection result; then, the drive circuit 310 and the switch circuit 320 are utilized to control the on or off of different power supplies according to the electric quantity signals, so that the automatic switching of the different power supplies is realized. The design mode has the advantages of high response speed, high reliability and the like, can meet the severe requirement of the outdoor camera on power management, and improves the stability and service life of the outdoor camera. Meanwhile, through reasonable circuit design and element selection, the performance and reliability of the power supply switching circuit can be further optimized, and the outdoor camera can be ensured to obtain stable and reliable power supply under various use scenes.
Further, referring to fig. 6 in combination, another embodiment of the present invention provides a power switching circuit of an outdoor camera, wherein the switching circuit 320 includes a seventh switching element Q1, an eighth switching element Q2, a ninth switching element Q3, a tenth switching element Q4, an eleventh switching element Q5, and a twelfth switching element Q6, as shown in the embodiment of the driving circuit 310 of fig. 6, wherein:
A first conducting end of the seventh switching element Q1 is connected to the output end of the lithium battery 110, a control end of the seventh switching element Q1 is connected to the first conducting end of the second switching element Q7, and a fifth resistor R1 is connected between the control end and the second conducting end of the seventh switching element Q1; the first conducting end of the eighth switching element Q2 is connected to the second conducting end of the seventh switching element Q1, and the control end of the eighth switching element Q2 is connected to the first conducting end of the second switching element Q7; a first conducting end of the ninth switching element Q3 is connected to the output end of the storage battery 120, a control end of the ninth switching element Q3 is connected to the first conducting end of the fourth switching element Q12, and a sixth resistor R2 is connected between the control end and the second conducting end of the ninth switching element Q3; the first conducting end of the tenth switching element Q4 is connected to the second conducting end of the ninth switching element Q3, and the control end of the tenth switching element Q4 is connected to the first conducting end of the fourth switching element Q12; a first conducting end of the eleventh switching element Q5 is connected to the output end of the dry battery, a control end of the eleventh switching element Q5 is connected to the first conducting end of the sixth switching element Q9, and a seventh resistor R3 is connected between the control end and the second conducting end of the eleventh switching element Q5; the first conducting end of the twelfth switching element Q6 is connected to the second conducting end of the eleventh switching element Q5, the control end of the twelfth switching element Q6 is connected to the first conducting end of the sixth switching element Q9, at least one capacitor is connected between the second conducting end of the twelfth switching element Q6 and ground, and the second conducting end of the twelfth switching element Q6 is connected to the second conducting end of the tenth switching element Q4.
In the present embodiment, the seventh switching element Q1, the eighth switching element Q2, the ninth switching element Q3, the tenth switching element Q4, the eleventh switching element Q5, and the twelfth switching element Q6 may be controllable switching elements such as field effect transistors, or relays. The switching elements are turned on or off for different power supplies according to control signals output from the driving circuit 310.
When the lithium battery 110 is sufficiently charged, the first comparison chip U1 outputs a low-level signal to turn off the first switching element Q10 and turn on the second switching element Q7. At this time, the control terminal of the seventh switching element Q1 and the control terminal of the eighth switching element Q2 receive the low level signal, and thus are turned on, so that the lithium battery 110 supplies power to the outdoor camera through the seventh switching element Q1 and the eighth switching element Q2. Meanwhile, since the third switching element Q11 is in the off state at this time, the control terminal of the sixth switching element Q9 does not receive any signal, and thus the states of the eleventh switching element Q5 and the twelfth switching element Q6 are not affected. When the battery 120 is charged sufficiently, the second comparing chip U2 outputs a low level signal to make the fourth switching element Q12 and the sixth switching element Q9 non-conductive, and further make the fifth switching element Q8 conductive. At this time, the control terminal of the ninth switching element Q3 and the control terminal of the tenth switching element Q4 receive the low level signal, and thus are turned on, so that the battery 120 supplies power to the outdoor camera through the ninth switching element Q3 and the tenth switching element Q4. Meanwhile, since the third switching element Q11 is in the off state at this time, the control terminal of the sixth switching element Q9 does not receive any signal, and thus the states of the eleventh switching element Q5 and the twelfth switching element Q6 are not affected. When it is desired to switch to dry cell power, this can be achieved by controlling the state of the sixth switching element Q9. When the sixth switching element Q9 is turned on, it outputs a low level signal, so that the control terminal of the eleventh switching element Q5 and the control terminal of the twelfth switching element Q6 receive the low level signal, thereby being turned on, and the dry battery supplies power to the outdoor camera through the eleventh switching element Q5 and the twelfth switching element Q6. At this time, since the seventh switching element Q1, the eighth switching element Q2, the ninth switching element Q3, and the tenth switching element Q4 are all in an off state, the lithium battery 110 and the storage battery 120 do not supply power to the outdoor camera.
In this embodiment, the power switching circuit can automatically switch three power sources of the lithium battery 110, the storage battery 120 and the dry battery, so as to ensure that the outdoor camera can obtain stable and reliable power supply under various conditions. Meanwhile, by adopting the combination of a plurality of switching elements and a control circuit, the accurate control of power supply switching is realized, and the utilization efficiency of the power supply and the stability of the system are improved.
In addition, by connecting at least one capacitor between the second conducting end of the twelfth switching element Q6 and the ground, noise and interference in the power supply can be effectively filtered, and the stability of the power supply can be improved. Meanwhile, the capacitor can also play a role in energy storage, short-term current support is provided at the moment of power supply switching, and normal operation of the outdoor camera is ensured.
Referring to fig. 4 to 5 in combination, further, a power switching circuit of an outdoor camera according to another embodiment of the present invention is provided, and based on the embodiment shown in fig. 1, the power switching circuit further includes a power-on circuit 400, where:
The input terminal of the power-on circuit 400 is connected to the battery 100, and the power-on circuit 400 is used for supplying power to the detection circuit 200 and the battery gating circuit 300.
In this embodiment, the power-on circuit 400 may be a separate circuit module for providing an initial power supply when the outdoor camera is powered on. The power-on circuit 400 is connected to the battery 100 to ensure that sufficient power is available to power the entire power switching circuit and detection circuit 200 when the camera is powered on. The design of the power-on circuit 400 needs to take into account the requirements of the start-up current and the start-up time to ensure that the camera can be brought into operation quickly and stably. In the design of the power-on circuit 400, a circuit design principle with low power consumption can be adopted to reduce energy waste. Meanwhile, in order to ensure the stability and reliability of the power-on circuit 400, some protection measures, such as over-current protection, over-voltage protection, etc., may be adopted to prevent the circuit from being damaged or unexpected.
When the outdoor camera is powered on, the power-on circuit 400 is first activated and provides the required power to the detection circuit 200 and the battery gating circuit 300. Subsequently, the detection circuit 200 starts to operate, detects the amount of electricity of the battery 100, and selects an appropriate power source to supply power according to the detection result. The battery gating circuit 300 controls the on/off of different power supplies according to the output signal of the detection circuit 200, so as to realize the function of turning on the corresponding battery 100.
In this embodiment, by introducing the startup circuit 400, it can be ensured that the outdoor camera can start up smoothly and work stably when starting up. In practical applications, the power-on circuit 400 may be further optimized and improved according to specific requirements, so as to improve performance and reliability thereof. For example, more efficient power conversion techniques may be employed to reduce energy losses; or a more intelligent control strategy is adopted to realize more accurate and rapid control of power supply switching.
In this embodiment, the power-on circuit 400 includes a power-on control circuit 410 and a power-on power circuit 420, wherein:
The power-on control circuit 410 is configured to reduce the voltage input by the battery 100, and output the reduced power to the detection circuit 200 and the battery gating circuit 300; an input end of the power-on power circuit 420 is connected with the battery 100, and an output end of the power-on power circuit 420 is connected with an input end of the power-on control circuit 410.
In this embodiment, the power-on control circuit 410 may include a step-down circuit for reducing the higher voltage input from the battery 100to a lower voltage suitable for the operation of the detection circuit 200 and the battery gating circuit 300. This ensures that these circuit modules can function properly while avoiding the risk of damage caused by too high voltages. The voltage-reducing circuit can adopt different voltage-reducing modes such as linear voltage reduction, switch voltage reduction and the like. The output terminal of the power-on control circuit 410 is connected to the input terminals of the detection circuit 200 and the battery gating circuit 300 to provide a stable operating voltage.
The power-on power circuit 420 is responsible for converting the power input by the battery 100 into the power required by the power-on control circuit 410. May be a simple power conversion circuit or rectifying circuit to convert the voltage of battery 100 to the voltage and current required by power-on control circuit 410. The power-on power circuit 420 is designed to take into consideration power conversion efficiency, stability, reliability, etc. to ensure that the power-on control circuit 410 operates stably and reliably.
Referring to fig. 7 in combination, further, a power switching circuit of an outdoor camera is provided according to still another embodiment of the present invention, based on the embodiments shown in fig. 4 to 5, the power on control circuit 410 includes a toggle switch S1, a thirteenth switching element Q13, and a buck chip U3, where:
The third end of the toggle switch S1 is grounded, and an eighth resistor R15 is connected between the first end of the toggle switch S1 and the output end of the power-on power circuit 420; the control end of the thirteenth switching element Q13 is connected to the second end of the toggle switch S1, and the second conducting end of the thirteenth switching element Q13 is connected to the output end of the power-on power circuit 420; the power input end of the buck chip U3 is connected with the first conducting end of the thirteenth switching element Q13, at least one capacitor is connected between the power input end of the buck chip U3 and the ground, at least one capacitor is connected between the output end of the buck chip U3 and the ground, and the output end of the buck chip U3 outputs voltage to the detection circuit 200 and the battery gating circuit 300 for supplying power.
In this embodiment, the toggle switch S1 may be a manually operated switch for controlling the power switching circuit to be turned on and off. When the toggle switch S1 is in the on position, the second end of the toggle switch S is connected to the third end, so that the control end of the thirteenth switching element Q13 receives the low-level signal, thereby conducting the thirteenth switching element Q13. At this time, the power output from the power-on power circuit 420 provides a power input to the buck chip U3 through the conducting path of the thirteenth switching element Q13. The step-down chip U3 performs step-down processing on the input power supply, and outputs a stable low voltage to be supplied to the detection circuit 200 and the battery gating circuit 300. Noise and interference in the power supply can be effectively filtered through the access capacitor, and the stability of the power supply is improved. Meanwhile, the capacitor can also play a role in energy storage, short-term current support is provided at the moment of power supply switching, and normal operation of the outdoor camera is ensured.
In practical applications, the thirteenth switching element Q13 may be implemented by a switching element such as a field effect transistor or a transistor. The buck chip U3 can select proper model and parameters according to specific power input and output requirements. By reasonably configuring parameters of elements such as resistance, capacitance and the like, the performance of the power supply switching circuit can be optimized, and the power supply conversion efficiency and stability are improved.
The power switching circuit in this embodiment realizes accurate control and management of the outdoor camera power by introducing the power-on control circuit 410. At the time of starting up, the power switching circuit can be conveniently started by operating the toggle switch S1, and stable power supply is provided for the detection circuit 200 and the battery gating circuit 300. In the power supply switching process, the stable operation of the outdoor camera under various conditions and the reliability of power supply are ensured by accurately controlling the on and off of different power supplies.
In addition, the power supply switching circuit in the embodiment has the advantages of simple structure, low cost, easiness in implementation and the like. Meanwhile, by adopting the combination of a plurality of switching elements and a control circuit, the accurate control of power supply switching is realized, and the utilization efficiency of the power supply and the stability of the system are improved.
Referring to fig. 7 in combination, further, a power switching circuit of an outdoor camera is provided according to a further embodiment of the present invention, based on the embodiments shown in fig. 4 to 5, the power-on circuit 420 includes a first diode, a second diode, and a third diode, where:
The positive electrode of the first diode is connected with the first output end of the battery 100; the positive electrode of the second diode is connected with the second output end of the battery 100; the positive electrode of the third diode is connected with a third output end of the battery 100; the cathode of the first diode, the cathode of the second diode and the cathode of the third diode are connected together and output a voltage to the input terminal of the start-up control circuit 410.
In this embodiment, the first diode, the second diode and the third diode are respectively connected to the output terminals of different batteries 100, for example, the first diode is connected to the storage battery 120, the second diode is connected to the dry battery, the third diode is connected to the lithium battery 110, and the first diode, the second diode and the third diode are respectively used for rectifying the power of the batteries 100. The cathodes of the three diodes are connected together to form a common cathode and output a voltage to the input of the power-on control circuit 410.
The power-on control circuit 410, by receiving this rectified power, performs further voltage reduction processing to output voltages suitable for operation of the detection circuit 200 and the battery gating circuit 300. The design enables the power supply switching circuit to adapt to the output characteristics of different batteries 100, and improves the compatibility and stability of the circuit.
In addition, the circuit damage caused by reverse connection of a power supply or polarity error can be effectively prevented by rectifying through the diode. If the polarity of the output of the battery 100 is wrong or the connection is wrong, the diode will prevent the reverse flow of current, protecting the circuit from damage.
The power switching circuit in this embodiment, by introducing the power-on power circuit 420, realizes rectification and stable output of the power of the battery 100, and provides reliable power input for the power-on control circuit 410. The design not only improves the utilization rate and stability of the power supply, but also enhances the safety and reliability of the circuit.
The invention also provides an outdoor camera, which comprises a power supply switching circuit of the outdoor camera, and the specific structure of the power supply switching circuit of the outdoor camera refers to the embodiment, and because the outdoor camera adopts all the technical schemes of all the embodiments, the outdoor camera at least has all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted.
The foregoing description is only exemplary embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the present invention.