Disclosure of Invention
The invention mainly aims to provide a charge and discharge control method for parallel double-battery packs, and aims to solve the technical problem that energy control is carried out on the parallel double-battery packs to improve use experience in the prior art.
In order to achieve the above-mentioned purpose, the present invention provides a charge-discharge control method of a parallel dual-battery pack, where the charge-discharge control method of the parallel dual-battery pack is applied to a charge-discharge control system, the charge-discharge control system includes a first battery pack, a high-voltage distribution box, a bidirectional DCDC, a second battery pack, and a charging module assembly, where the first battery pack, the high-voltage distribution box, the bidirectional DCDC, and the second battery pack are electrically connected in sequence, and the charging module assembly is electrically connected with the high-voltage distribution box;
the method comprises the following steps:
When the travelling crane is electrified, if the first battery pack has no fault and the whole vehicle state is normal, the first battery pack is electrified, otherwise, the first battery pack is not electrified;
if the condition that the first battery pack is successfully electrified and the allowable charging power is larger than a preset power threshold is met, the second battery pack has no fault and the residual electric quantity is in the range of the preset electric quantity threshold, outputting and supplying power by the second battery pack;
if the output power of the second battery pack is larger than the power required by the whole electric appliance, the converted output of the second battery pack is used for supplying power, and the first battery pack is charged;
if the output power of the second battery pack is smaller than the power required by the whole electric appliance, the output of the first battery pack and the converted output of the second battery pack are used for supplying power together;
And if any one or more of the output power supply conditions of the second battery pack are not met, enabling the first battery pack to carry out independent output power supply.
Optionally, in the process of powering up the travelling crane, the method for controlling charging and discharging of the parallel dual-battery pack further comprises the following steps:
if the second battery pack or the bidirectional DCDC has faults but the whole vehicle has no high-voltage power-down faults, the second battery pack is directly powered down, and the bidirectional DCDC enters a standby state.
Optionally, the charge and discharge control method of the parallel dual battery pack further includes:
When the travelling crane is powered down, the second battery pack is powered down and whether the power down is successful or not is judged;
if yes, continuing to power down the first battery pack;
if not, powering down the first battery pack after timeout.
Optionally, the charge and discharge control method of the parallel dual battery pack further includes:
When charging and electrifying, if the first battery pack has no fault and the whole vehicle meets the charging condition, electrifying the first battery pack, otherwise, not electrifying the first battery pack.
Optionally, after the charging is powered up, the method further comprises:
If the condition that the first battery pack is successfully electrified and the second battery pack is fault-free and the charging voltage and the charging current output by the charging equipment are respectively larger than the respective preset threshold values is met, the second battery pack is electrified, so that the first battery pack and the second battery pack are charged simultaneously;
if the condition is not satisfied, the first battery pack is charged alone.
Optionally, the charge and discharge control method of the parallel dual battery pack further includes:
And if the second battery pack is charged, directly powering down the second battery pack.
Optionally, after the charging is completed, the method further comprises:
And if the first battery pack is charged, the second battery pack is powered down, if the second battery pack is powered down successfully, the first battery pack is powered down, otherwise, the first battery pack is powered down after overtime.
Optionally, the charge and discharge control method of the parallel dual battery pack further includes:
The voltage of the first battery pack and the second battery pack is regulated and controlled using a bidirectional DCDC (Direct Current) converter.
In addition, in order to achieve the above object, the present invention also provides a charge and discharge control apparatus of a parallel dual battery pack, the charge and discharge control apparatus of the parallel dual battery pack comprising: the method comprises the steps of a first battery pack, a high-voltage distribution box, a bidirectional DCDC, a second battery pack, a charging module assembly, a memory, a processor and a charge and discharge control program of a parallel double-battery pack, wherein the charge and discharge control program is stored in the memory and can run on the processor, the first battery pack, the high-voltage distribution box, the bidirectional DCDC and the second battery pack are sequentially and electrically connected, the charging module assembly is electrically connected with the high-voltage distribution box, and the charge and discharge control program of the parallel double-battery pack is executed by the processor.
In addition, in order to achieve the above object, the present invention also provides a computer readable storage medium having stored thereon a charge and discharge control program of a parallel dual battery pack, which when executed by a processor, implements the steps of the charge and discharge control method of a parallel dual battery pack as described above.
According to the charge and discharge control method, the charge and discharge control equipment and the computer readable storage medium for the parallel double-battery pack, provided by the embodiment of the invention, by using the bidirectional DC-DC converter as the power supply control circuit, the voltages of the two parallel double-battery packs with different voltage platforms are regulated, the charge and discharge process of the parallel double-battery pack with unequal voltages is effectively controlled, and corresponding charge and discharge strategies are used for application scenes including but not limited to power-on, power-off, charge-on completion and the like of a traveling crane, so that the endurance mileage can be improved on the premise of ensuring the power performance, economy and drivability, the charge and discharge deficiency caused by different voltages are solved, the heating is reduced, and the problem of reasonable charge and discharge control of the battery pack is solved.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
As shown in fig. 1, fig. 1 is a schematic diagram of a terminal structure of a hardware running environment according to an embodiment of the present invention.
The terminal of the embodiment of the invention can be a PC, and also can be mobile terminal equipment with a display function, such as a smart phone, a tablet personal computer, an electronic book reader, a portable computer and the like.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
Optionally, the terminal may also include a camera, an RF (Radio Frequency) circuit, a sensor, an audio circuit, a WiFi module, and so on. Among other sensors, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display screen according to the brightness of ambient light, and a proximity sensor that may turn off the display screen and/or the backlight when the mobile terminal moves to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and the direction when the mobile terminal is stationary, and the mobile terminal can be used for recognizing the gesture of the mobile terminal (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and knocking), and the like; of course, the mobile terminal may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, and the like, which are not described herein.
It will be appreciated by those skilled in the art that the terminal structure shown in fig. 1 is not limiting of the terminal and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
As shown in fig. 1, an operating system, a network communication module, a user interface module, and a charge and discharge control program of the parallel dual battery pack may be included in a memory 1005 as one type of computer storage medium.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a background server and performing data communication with the background server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to call a charge and discharge control program of the parallel dual battery pack stored in the memory 1005 and perform the following operations:
When the travelling crane is electrified, if the first battery pack has no fault and the whole vehicle state is normal, the first battery pack is electrified, otherwise, the first battery pack is not electrified;
if the condition that the first battery pack is successfully electrified and the allowable charging power is larger than a preset power threshold is met, the second battery pack has no fault and the residual electric quantity is in the range of the preset electric quantity threshold, outputting and supplying power by the second battery pack;
if the output power of the second battery pack is larger than the power required by the whole electric appliance, the converted output of the second battery pack is used for supplying power, and the first battery pack is charged;
if the output power of the second battery pack is smaller than the power required by the whole electric appliance, the output of the first battery pack and the converted output of the second battery pack are used for supplying power together;
And if any one or more of the output power supply conditions of the second battery pack are not met, enabling the first battery pack to carry out independent output power supply.
Further, the processor 1001 may call the dual battery pack charge-discharge control program stored in the memory 1005, and further perform the following operations:
if the second battery pack or the bidirectional DCDC has faults but the whole vehicle has no high-voltage power-down faults, the second battery pack is directly powered down, and the bidirectional DCDC enters a standby state.
Further, the processor 1001 may call the dual battery pack charge-discharge control program stored in the memory 1005, and further perform the following operations:
When the travelling crane is powered down, the second battery pack is powered down and whether the power down is successful or not is judged;
if yes, continuing to power down the first battery pack;
if not, powering down the first battery pack after timeout.
Further, the processor 1001 may call the dual battery pack charge-discharge control program stored in the memory 1005, and further perform the following operations:
When charging and electrifying, if the first battery pack has no fault and the whole vehicle meets the charging condition, electrifying the first battery pack, otherwise, not electrifying the first battery pack.
Further, the processor 1001 may call the dual battery pack charge-discharge control program stored in the memory 1005, and further perform the following operations:
If the condition that the first battery pack is successfully electrified and the second battery pack is fault-free and the charging voltage and the charging current output by the charging equipment are respectively larger than the respective preset threshold values is met, the second battery pack is electrified, so that the first battery pack and the second battery pack are charged simultaneously;
if the condition is not satisfied, the first battery pack is charged alone.
Further, the processor 1001 may call the dual battery pack charge-discharge control program stored in the memory 1005, and further perform the following operations:
And if the second battery pack is charged, directly powering down the second battery pack.
Further, the processor 1001 may call the dual battery pack charge-discharge control program stored in the memory 1005, and further perform the following operations:
And if the first battery pack is charged, the second battery pack is powered down, if the second battery pack is powered down successfully, the first battery pack is powered down, otherwise, the first battery pack is powered down after overtime.
Further, the processor 1001 may call the dual battery pack charge-discharge control program stored in the memory 1005, and further perform the following operations:
The voltage of the first battery pack and the second battery pack is regulated and controlled using a bidirectional DCDC (Direct Current) converter.
Referring to fig. 2, the present invention provides a charge-discharge control method of a parallel dual battery pack, in an embodiment of the charge-discharge control method of a parallel dual battery pack of the present invention, the charge-discharge control method of a parallel dual battery pack is applied to a charge-discharge control system, the charge-discharge control system includes a first battery pack, a high voltage distribution box, a bidirectional DCDC, a second battery pack and a charging module assembly, the first battery pack, the high voltage distribution box, the bidirectional DCDC and the second battery pack are electrically connected in sequence, and the charging module assembly is electrically connected with the high voltage distribution box;
the step of powering up the travelling crane comprises the following steps:
And S10, when the travelling crane is electrified, if the first battery pack is fault-free and the whole vehicle is in a normal state, the first battery pack is electrified, otherwise, the first battery pack is not electrified.
And (3) starting the electric vehicle, and carrying out low-voltage power-on the whole vehicle in an initialization stage, namely connecting the battery pack with a channel to form a power supply loop. And judging whether the first battery pack has no fault, the whole vehicle has no forbidden power-on fault, the gear of the electric vehicle is normal, the braking state of the electric vehicle is normal and the connection state of the charging gun is normal after low-voltage power-on is carried out. In an embodiment of the present invention, after low-voltage power-up is performed, if the first battery pack has no fault, the entire vehicle has no fault for prohibiting power-up, the electric vehicle is in ON gear, the brake pedal state is depressed, and the charging gun is not connected with the electric vehicle, then power-up operation is performed ON the first battery pack; if any one or more conditions are not met, the first battery pack is not powered on. Therefore, the precondition that the first battery pack is electrified is that the first battery pack is fault-free and the whole vehicle is normal, so that the success and safety of the electrification of the first battery pack are ensured. In the embodiment of the invention, the judging conditions of whether the fault type of the first battery pack and the state of the whole vehicle are normal are not limited.
And step S20, if the condition that the first battery pack is successfully electrified and the allowable charging power is larger than the preset power threshold is met, the second battery pack has no fault and the residual electric quantity is in the preset electric quantity threshold range, and the second battery pack outputs power supply conditions, so that the second battery pack outputs power supply.
In the embodiment of the invention, the first battery pack is a high-voltage main battery pack, the second battery pack is a low-voltage auxiliary battery pack, the two battery packs belong to different voltage platforms, are connected in parallel, and regulate the voltage of the two battery packs through the bidirectional DCDC module. After the first battery pack is powered on, if the power on is unsuccessful, reconnecting and powering on again; or if the power-on is unsuccessful, alarming; or after the power-on time threshold of the first battery pack is preset, the first battery pack is not powered on, and then the first battery pack is reconnected and powered on again; or after the power-on time threshold of the first battery pack is preset, the power-on is not performed, and then an alarm is given. In the embodiment of the invention, the method for successfully re-powering the first battery pack after the first battery pack is powered on is not limited. After the first battery pack is powered on safely and successfully, whether the charging power allowed to be accepted by the first battery pack is larger than a preset power threshold value, whether the second battery pack has no faults, whether the residual electric quantity of the second battery pack is within a preset electric quantity threshold value range or not, and whether the bidirectional DCDC module has no faults or not are further judged. In an embodiment of the present invention, if the condition that the first battery pack is successfully powered on and the allowable charging power is greater than the preset power threshold is met, the second battery pack has no fault, the residual electric quantity is within the preset electric quantity threshold range, and the bidirectional DCDC module has no fault, the second battery pack is powered on and outputs power, the bidirectional DCDC module enters a discharging state, and the second battery pack is enabled to output with constant current in response to a discharging current request sent by the second battery pack. In the embodiment of the invention, the output power supply condition of the second battery pack is not limited, so that the success and the safety of the power-on of the second battery pack are ensured.
And step S30, if the output power of the second battery pack is larger than the power required by the electric appliance of the whole vehicle, using the converted output of the second battery pack to supply power, and charging the first battery pack.
When the travelling crane is electrified, when the first battery pack and the second battery pack meet respective electrifying conditions, after the first battery pack and the second battery pack are added into a power supply loop, the output power of the second battery pack and the power required by the electric appliance of the whole crane are judged. If the output power of the second battery pack is larger than the power required by the electric appliance of the whole vehicle, the second battery pack is used for supplying power alone, so that the output of the second battery pack after being converted by the bidirectional DCDC module is used for supplying power alone.
And S40, if the output power of the second battery pack is smaller than the power required by the electric appliance of the whole vehicle, the output of the first battery pack and the converted output of the second battery pack are used for supplying power together.
When the travelling crane is electrified, when the first battery pack and the second battery pack meet respective electrifying conditions, after the first battery pack and the second battery pack are added into a power supply loop, the output power of the second battery pack and the power required by the electric appliance of the whole crane are judged. If the output power of the second battery pack is smaller than the power required by the whole vehicle electric appliance, the fact that the second battery pack alone is used for supplying power is not enough to bear the whole vehicle electric power at the moment is indicated, and the output of the first battery pack is required to be supplemented with the notch power of the second battery pack alone which is not enough to bear the power required by the whole vehicle electric appliance, namely the supplement output of the first battery pack and the output of the second battery pack after the bidirectional DCDC module conversion are used for supplying power together.
And step S50, if any one or more of the output power supply conditions of the second battery pack are not met, enabling the first battery pack to carry out independent output power supply.
After the first battery pack is powered on safely and successfully, whether the charging power allowed to be accepted by the first battery pack is larger than a preset power threshold value, whether the second battery pack has no faults or not, and whether the residual electric quantity of the second battery pack is within a preset electric quantity threshold value or not needs to be further judged, and the second battery pack outputs power supply conditions. If any one or more conditions are not met, the fact that the second battery pack cannot be successfully and safely powered up at the moment is indicated, and the first battery pack is directly used for independently supplying power so as to meet the power requirement of the whole vehicle. Similarly, after the second battery pack is powered on, if the power on is unsuccessful, reconnecting and re-powering on are performed; or if the power-on is unsuccessful, alarming; or after the second battery pack is powered on for a preset time threshold, the second battery pack is not powered on yet, and is connected again for re-powering on; or after the power-on time threshold of the second battery pack is preset, the power-on is not performed, and then an alarm is given. In the embodiment of the invention, the method for successfully re-powering the second battery pack after the second battery pack is powered on is not limited.
Optionally, in the power-on process of the travelling crane, the charge and discharge control method of the parallel dual-battery pack further includes:
if the second battery pack or the bidirectional DCDC has faults but the whole vehicle has no high-voltage power-down faults, the second battery pack is directly powered down, and the bidirectional DCDC enters a standby state.
In an embodiment of the present invention, in a power-up process of a vehicle, if the second battery pack fails and the first battery pack fails, the second battery pack is directly powered down, and the first battery pack still works.
In the embodiment, first, judging whether a first battery pack meets a power-on condition when a travelling crane is powered on, and if so, powering on the first battery pack; and after the first battery pack is successfully electrified, judging whether the electrifying condition of the second battery pack is met at the moment, and electrifying the second battery pack if the electrifying condition of the second battery pack is met. After the first battery pack and the second battery pack are powered on and then connected into a power supply loop, judging whether the output of the second battery pack after the bidirectional DCDC boost conversion meets the power for the whole vehicle or not, if so, using the second battery pack to independently output and supply power, and if not, using the first battery pack to supplement the output of the second battery pack and a notch of the power for the whole vehicle to jointly supply power. If the second battery pack cannot be powered on, the first battery pack is used for independently supplying power. Therefore, in the embodiment of the invention, the first battery pack and the second battery pack are regulated through the bidirectional DCDC module, so that the full-charge state of the first battery pack is met as much as possible to obtain longer endurance mileage, and the driving power performance is ensured and meanwhile the economic performance of the electric automobile is improved.
The invention provides a charge and discharge control method of a parallel double-battery pack, in one embodiment of the charge and discharge control method of the parallel double-battery pack, the step of powering down the travelling crane comprises the following steps:
When the travelling crane is powered down, the second battery pack is powered down and whether the power down is successful or not is judged;
if yes, continuing to power down the first battery pack;
if not, powering down the first battery pack after timeout.
And (3) carrying out power-down treatment on the whole electric automobile, namely disconnecting the battery pack to cut off a power supply loop. And judging whether the gear of the vehicle is normal or not before the power-down processing is carried out, or whether the whole vehicle has a high-voltage power-down fault or whether the connection state of the charging gun is normal or not. In an embodiment of the present invention, if the electric vehicle is in an ACC (Adaptive Cruise Control ) gear or an OFF gear, or the whole vehicle has a high-voltage power down fault, or the charging gun is in a normal connection state before the power down process, the second battery pack is powered down and the bidirectional DCDC module enters a standby state. Judging whether the second battery pack is powered down successfully or not, and if so, powering down the first battery pack; if the power-down fails, the overtime judgment is carried out, and after the time exceeds the preset time threshold, the first battery pack is powered down forcedly, so that the situation that the first battery pack cannot be powered down normally due to the failure is avoided.
In the embodiment of the invention, the condition of power-down of the travelling crane is adaptively set, the second battery pack is powered down preferentially, and the power supply loop is disconnected to enable the second battery pack to not be powered any more. And after the second battery pack is powered down successfully, the first battery pack is powered down continuously, or after the power down time of the second battery pack exceeds the limit, the first battery pack is powered down directly, so that the problem that larger unnecessary faults are caused by faults of the second battery pack is avoided. When the second battery pack fails but the whole vehicle has no high-voltage power-down failure, the second battery pack is directly powered off, the first battery pack continues to work, and the whole vehicle can still normally run.
The invention provides a charge and discharge control method of a parallel dual battery pack, in an embodiment of the charge and discharge control method of the parallel dual battery pack, the step of charging and powering up comprises the following steps:
When charging and electrifying, if the first battery pack has no fault and the whole vehicle meets the charging condition, electrifying the first battery pack, otherwise, not electrifying the first battery pack.
When the electric vehicle is charged, the whole vehicle is charged, namely, a battery pack is connected with a channel to form a charging loop. When charging and electrifying, judging whether the first battery pack has no fault, the whole vehicle has no forbidden charging fault and the whole vehicle meets normal charging conditions. In an embodiment of the invention, when charging and electrifying, if the first battery pack has no fault, the whole vehicle has no forbidden charging fault, and the whole vehicle meets the normal charging condition, charging and electrifying the first battery pack; and if any one or more conditions are not met, the first battery pack is not charged and electrified. In the embodiment of the invention, in order to ensure the safety of successful charging of the battery pack, the judgment condition of normal charging and power-up of the first battery pack is not limited.
The step of charging and electrifying further comprises the following steps:
If the condition that the first battery pack is successfully electrified and the second battery pack is fault-free and the charging voltage and the charging current output by the charging equipment are respectively larger than the respective preset threshold values is met, the second battery pack is electrified, so that the first battery pack and the second battery pack are charged simultaneously;
if the condition is not satisfied, the first battery pack is charged alone.
After the first battery pack is charged and electrified, if the charging and the electrifying are unsuccessful, reconnecting and electrifying again; or if the power-on is unsuccessful, alarming; or after the first battery pack is charged and powered up by a preset threshold value, the battery pack is not powered up yet, and is connected again to be powered up again; or after the first battery pack is charged and the power-on time threshold is preset, the alarm is given. In the embodiment of the invention, the method for successfully re-powering the first battery pack after the first battery pack is charged and powered up is not limited. After the first battery pack is charged and electrified safely and successfully, whether the second battery pack has no fault or not, whether the output charging voltage and the output charging current of the charger are larger than a preset threshold value or not and whether the bidirectional DCDC module has no fault or not needs to be further judged. In an embodiment of the present invention, if the second battery pack is not faulty, the output charging voltage and the output charging current of the charger are greater than a preset threshold, and the bidirectional DCDC module is not faulty, the second battery pack is charged and electrified, the bidirectional DCDC module enters a charging state, and the first battery pack and the second battery pack are charged simultaneously in response to a charging current request sent by the second battery pack. In the embodiment of the invention, the charging condition of the second battery pack is not limited, so that the success and the safety of the charging of the second battery pack are ensured.
After the first battery pack is powered on safely and successfully, whether the second battery pack has no fault, whether the output charging voltage and the output charging current of the charger are greater than a preset threshold value and whether the bidirectional DCDC module has no fault are further required to be judged. If any one or more conditions are not met, the condition that the second battery pack cannot be successfully and safely charged at the moment is indicated, and the first battery pack is charged independently. Similarly, after the second battery pack is charged and electrified, if the charging and electrifying are unsuccessful, reconnecting and electrifying again; or if the charging is unsuccessful, alarming is carried out; or after the charging and electrifying time threshold of the second battery pack is preset, the charging and electrifying are still unsuccessful, and the charging and electrifying are performed again; or after the second battery pack is powered on by the preset power-on time threshold, the battery pack is still not charged successfully and powered on, and then an alarm is given. In the embodiment of the invention, the method for recharging and powering up the second battery pack after the second battery pack is subjected to the charging and powering-up operation is not limited.
In the embodiment of the invention, firstly, whether a charging condition is met or not is judged for a first battery pack during charging and electrifying, and if so, the first battery pack is charged and electrified; and after the first battery pack is charged and electrified successfully, judging whether the charging and electrifying condition of the second battery pack is met, and if so, charging and electrifying the second battery pack. And after the first battery pack and the second battery pack are charged and are electrified to be connected into a charging loop, the first battery pack and the second battery pack are charged simultaneously. If the second battery pack cannot be charged and electrified, the first battery pack is charged independently. Therefore, in the embodiment of the invention, the first battery pack and the second battery pack are regulated through the bidirectional DCDC module, so that the charging state of the first battery pack is met as much as possible to obtain shorter charging time, and the electric quantity of the first battery pack and the second battery pack is fully charged as soon as possible under the requirement of safety charging, so that the electric vehicle is convenient to use.
The invention provides a charge and discharge control method of a parallel dual battery pack, in an embodiment of the charge and discharge control method of the parallel dual battery pack, the charge completion step comprises:
And if the second battery pack is charged, directly powering down the second battery pack.
And when the charging is completed, the electric automobile is charged and powered down, namely, the battery pack is disconnected to cut off a charging loop. When the second battery pack is charged to SOC (State of Charge) =100%, the second battery pack is directly charged and powered down, and the bidirectional DCDC module enters a standby State. In the charging strategy of the embodiment of the invention, the electric quantity of the second battery pack is considered to be smaller, so that the second battery pack is not singly connected to the loop, but the second battery pack is calibrated to finish charging before the first battery pack.
The step of charging is completed, further comprising:
And if the first battery pack is charged, the second battery pack is powered down, if the second battery pack is powered down successfully, the first battery pack is powered down, otherwise, the first battery pack is powered down after overtime.
However, in the charging strategy according to the embodiment of the present invention, in the step D, there is a possibility that the first battery pack and the second battery pack are charged and powered up simultaneously, or there is a case that the first battery pack completes charging before the second battery pack, if the first battery pack completes charging first, the whole charging loop is disconnected, and at this time, the second battery pack is charged and powered down without considering the electric quantity of the second battery pack, and the bidirectional DCDC module is put into a standby state. And judging whether the second battery pack is charged and powered down successfully, and if the second battery pack is charged and powered down successfully, continuing to charge and power down the first battery pack. If the first battery pack fails to be charged and powered down, the overtime judgment is carried out, and after the time exceeds the preset time threshold, the first battery pack is forcedly charged and powered down, so that the situation that the first battery pack cannot be charged and powered down normally due to faults is avoided.
In the embodiment of the invention, the charging conditions of the first battery pack and the second battery pack are optimized, the battery pack which is charged firstly is judged to be charged, the battery pack which is charged firstly and is charged secondly, and the battery pack which is charged till the SOC=100% is not charged anymore, so that the battery pack is charged timely. The battery pack charging circuit has the advantages that the battery pack charging circuit is time-saving and efficient, meanwhile, faults caused by the fact that the battery pack is always connected to the charging circuit are avoided, and charging experience and vehicle use experience of a user are improved.
The invention provides a charge and discharge control method of a parallel dual battery pack, in an embodiment of the charge and discharge control method of a parallel dual battery pack of the invention, the charge and discharge control method of a parallel dual battery pack further comprises:
the voltage of the first battery pack and the second battery pack is regulated and controlled using a bi-directional DCDC converter.
In an embodiment of the invention, bidirectional DC converter is used to realize bidirectional flow of DC electric energy, and the bidirectional DC converter has the functions of boosting and reducing voltage, and can charge the battery pack with high efficiency when the bidirectional DC converter works in a forward working state and discharge the battery pack with high efficiency when the bidirectional DC converter works in a reverse working state. Under various operating modes of driving power-on, driving power-off, charging power-on and charging completion, the bidirectional DCDC converter switches different states and comprises: charge state, discharge state, standby state, normal state without failure, etc.
In the embodiment of the invention, the first battery pack and the second battery pack are regulated through the practical bidirectional DCDC converter, so that the energy consumption of charging and discharging on the resistor is avoided, the energy waste is reduced, and the charging and discharging efficiency of the battery packs is reasonably improved. When charging, the charging waiting time can be shortened, the endurance mileage of the electric automobile can be improved when the electric automobile is driven, and the driving performance is improved while the power performance is ensured.
In addition, the embodiment of the invention also provides charge and discharge control equipment of the parallel double-battery pack, which comprises: the method comprises the steps of a first battery pack, a high-voltage distribution box, a bidirectional DCDC, a second battery pack, a charging module assembly, a memory, a processor and a charge and discharge control program of a parallel double-battery pack, wherein the charge and discharge control program is stored in the memory and can run on the processor, the first battery pack, the high-voltage distribution box, the bidirectional DCDC and the second battery pack are sequentially and electrically connected, the charging module assembly is electrically connected with the high-voltage distribution box, and the charge and discharge control program of the parallel double-battery pack is executed by the processor. Referring to fig. 3, the charge and discharge control apparatus of the parallel dual battery pack includes a driving motor; a motor controller connected with the motor; the output end of the first battery pack is connected with the input end of the motor controller, and the first battery pack is connected with the high-voltage distribution box; the second battery pack is connected with the high-voltage distribution box after passing through the bidirectional DCDC; and the bidirectional DCDC module is used for adjusting the voltage output by the second battery pack to the electric appliance of the whole vehicle and the voltage input by the charging module assembly to the second battery pack. And the high-voltage distribution box coordinates the function conversion and the energy distribution of the high-voltage components such as the first battery pack, the bidirectional DCDC, the charging module assembly and the like. And the charging module assembly comprises an on-board charger (OBC) module and a DCDC module. The first battery pack and the second battery pack are connected in parallel. The voltage platforms of the first battery pack and the second battery pack are different, and the bidirectional DCDC can adjust the voltages of the two battery packs.
In addition, the embodiment of the invention also provides a computer readable storage medium, wherein the computer readable storage medium stores a charge and discharge control program of the parallel double-battery pack, and the charge and discharge control program of the parallel double-battery pack realizes the steps of the charge and discharge control method of the parallel double-battery pack when being executed by a processor.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.