CN101986509A - charger - Google Patents

Abstract

The invention relates to a charger, in particular to a lithium battery charger, which can realize the quick charging of a lithium battery and comprises a shell and an operation panel, wherein a groove for placing a rechargeable battery is arranged on the shell, an inner cavity formed by the shell comprises a charging circuit, the charging circuit has a quick charging mode and charges the rechargeable battery with large current, the charging circuit also has a normal charging mode and charges the rechargeable battery with normal current, and the switching of the two charging modes is controlled by a control circuit. The charger of the invention provides an ultra-fast charging scheme which has a selectable charging mode and can be controlled by depending on the temperature change of the battery, and can realize that the charging power can be output in excess under the low-power and proper temperature change trend so as to realize that the battery can be safely provided with certain capacity (energy) in a short time to complete certain amount of work.

Description

Charger

Technical field

The present invention relates to a kind of charger, relate in particular to a kind of lithium battery charger, can realize the charger of lithium battery quick charge.

Background technology

The client is when using lithium battery, the following situation of ubiquity: finish certain workload or also remain sub-fraction work imperfect tense at needs, find that the power brick electric weight is not enough, at this moment the user needs the battery of sub-fraction capacity (such as the battery capacity of a%) to finish the work (not needing the full capacity battery), and wish to have a kind of pattern of charger in the extremely short time, to finish the charging process of battery a% capacity such as 100S-200S.But the charger for lithium ion battery design cost of quick charge at present is higher, and model selection is relatively poor.

Summary of the invention

Technical problem to be solved by this invention is to overcome defective of the prior art, and realizing providing a kind of charger of selecting charge mode with low-cost, and what make safety in a short period of time gives battery certain capacity (energy) to finish a certain amount of work.

For solving the problems of the technologies described above, the invention provides a kind of charger, comprise casing, guidance panel, establish the groove that can place rechargeable battery on the casing, the inner chamber that casing constitutes comprises charging circuit, and charging circuit has fast charge mode, with big electric current rechargeable battery is charged, charging circuit also has normal charge mode, with normal current rechargeable battery is charged, and the switching of two kinds of charge modes is controlled by control circuit.

Wherein the charging current of fast charge mode is greater than the charging current of normal charge mode, and the charging interval is less than the charging interval of normal charge mode.

The switching of fast charge mode and normal charge mode can be monitored current temperature of rechargeable battery and magnitude of voltage control automatic switchover according to temperature sensing circuit, voltage detecting circuit in real time by control circuit, also can trigger, manually select by the user by the control switch on the guidance panel.

The beneficial effect that the present invention reached: charger of the present invention provides has optionally charge mode, wherein a kind of pattern comprises: rely on battery temperature to change and battery-operated ultrafast charging scheme, this charger design has selectable fast charge mode, can exceed the quata to export charge power to realize filling with to battery at short notice the capacity of a% under low electric and suitable temperature changing trend, this capacity is enough to finish the work of urgent need.

Description of drawings

Fig. 1 is a charger schematic diagram of the present invention;

Fig. 2 is the module map of the charging circuit of charger of the present invention;

Fig. 3 is the workflow diagram of charger of the present invention;

Fig. 4 is the charging circuit figure of Fig. 2.

Among the figure, 1, casing; 101, upper casing; 102, lower casing; 2, charging slot; 3, guidance panel; 3a, control switch; 4a, red LED; 4b, green LED; 5, charging circuit; 6, control circuit; 7, indicating circuit; 8, temperature sensing circuit; 9, voltage detecting circuit; 10, mode selection circuit; 11, convert charging circuit; 110, AC-DC input circuit; 111, DC-DC power circuit; 112, dc voltage output circuit; 13, outer triggering signal.

Embodiment

Below in conjunction with accompanying drawing the present invention is further described.Following examples only are used for technical scheme of the present invention more clearly is described, and can not limit protection scope of the present invention with this.

Be illustrated in figure 1 as the preferred a kind of schematic diagram of charger of the present invention, casing 1 is fastened byupper casing 101 andlower casing 102 and forms an integral body, establish the charging slot 2 that to place rechargeable battery on the casing 1, the inner chamber that casing 1 constitutes comprises charging circuit, casing 1 is provided with the display unit ofguidance panel 3 and indication charged state, can be emitting led or LCD display, and control switch 3a.Display unit is red LED 4a andgreen LED 4b herein, and control switch 3a has button backlight.

Charger has the pattern of quick charge, or claims Peak pattern, peak value charge mode, and normal charge mode.Under fast charge mode, charger is charged to a fuller state with battery in the extremely short time; Under normal charge mode, charger charges normal.Whether the pilot cell that is used for backlight of control switch 3a is in the state that can select quick charge, and represents that with flicker backlight battery is by quick charge.Light when control switch is backlight, pilot cell meets the condition of selecting quick charge, press control switch 3a after, charging enters fast charge mode, flicker backlight, quick charge finish the Chang Liang backlight of back control switch 3a.

The red LED 4a of display unit andgreen LED 4b are used to the charged state that reports an error and charge normal.Bright as red LED4a, represent battery generation abnormal conditions, the abnormal conditions under fast charge mode and normal charge mode are all used this mode.Green LED 4b is used to indicate the charge condition that charges normal, when battery charges under normal charge mode, andgreen LED 4b flicker, battery is full of backgreen LED 4b Chang Liang.

As shown in Figure 2,charger charging circuit 5 structures of the present invention comprise, andtemperature sensing circuit 8,voltage detecting circuit 9 are monitored rechargeable battery Current Temperatures and voltage in real time, and will monitor numerical value and be sent tocontrol circuit 6; The information ofcontrol circuit 6 receptions and treatmenttemperature testing circuit 8,voltage detecting circuit 9 is or/and the input information ofoutside guidance panel 3, the charge mode ofcontrol charging circuit 5, and current state information is sent to indicatingcircuit 7, indicatingcircuit 7 can comprise display unit, is used to indicate charged state or other information that need show.

The control signal thatmode selection circuit 10 sends according tocontrol circuit 6 is selected to enter fast charge mode (abbreviating the Peak pattern as) or normal charge mode, and can be switched between two kinds of patterns.Convert charging circuit 11 is connected with rechargeable battery, comprises the AC-DC input circuit 110, DC-DC power circuit 111 and the dcvoltage output circuit 112 that connect successively, and the charge mode that sends according tomode selection circuit 10 charges to rechargeable battery.

Under a kind of execution mode, current temperature and the magnitude of voltage of rechargeable battery thatcontrol circuit 6 is monitored in real time according totemperature sensing circuit 8,voltage detecting circuit 9 judged selection, the automatic switchover charge mode.Whentemperature sensing circuit 8 detected battery temperatures meet default temperature range, andvoltage detecting circuit 9 detected cell voltages meet default voltage range, thencontrol circuit 6 outputs one control signal tomode selection circuit 10, and charge mode is switched to fast charge mode.

Under the another kind of execution mode,control circuit 6 receives outer triggeringsignal 13 and carries out the switching of charge mode.Outer triggeringsignal 13 can be the signal of switch triggering, also can be the triggering signal of light, electricity, sound form.In the present embodiment, preferred, for by the manual control switch 3a ofguidance panel 3, input control signal.

Guidance panel 3 or be button, or be touch, or be the form of both combinations.Also partial function or the repertoire of indicatingcircuit 7 withguidance panel 3 can be integrated.Can be provided with charging interval, charging current byguidance panel 3.

As Fig. 2, shown in Figure 3, a kind of workflow of charger of the present invention is described, when charger has detected battery and inserts, at first detect the temperature, voltage of batteries whether in the scope that allows charging bytemperature sensing circuit 8, voltage detecting circuit 9.If battery needs charging, then can select to enter fast charge mode (being called for short the Peak pattern) or normal charge mode bymode selection circuit 10, fast charge mode convert charging circuit 11 can provide big electric current I 1 to charge to rechargeable battery, as 6A, realize battery being carried out quick charge in short-term with bigger charging current.The mode that selection enters fast charge mode or normal charge mode has two kinds, and a kind of is to automatically switch, and a kind of is non-automatic switchover, promptly relies on outer triggeringsignal 13 to trigger and enters.Only introduce outer triggeringsignal 13 in the present embodiment and trigger the mode that enters, when control switch 3a triggers, enter the Peak pattern.

In the Peak pattern, charging interval, charging current to be set, the preset charged electric current is I1, as 6A, compares with the charging current value I2 of normal charge mode, general, I2 is 1.5A, I1〉I2.The setting charging interval is t1, as 3min.Under the condition of this big electric current, battery is charged, can in default very short time, make the energy of battery be charged to a fuller degree, as 70%, to satisfy the basic use needs of user fast.Under this pattern, the highest battery temperature that preset charged allows is T1 simultaneously, and as 40 degrees centigrade, maximum battery voltage is V1.When the charging interval reaches set point t1, withdraw from the Peak pattern, perhaps, withdraw from the Peak pattern automatically when detected battery temperature or voltage coefficient during more than or equal to default the highest battery temperature T1, V1.

After withdrawing from the Peak pattern, battery is not extracted from charger as the user, then charging procedure changes normal charge mode over to and charges,green LED 4b flicker.The charging current I2 that uses under normal charge mode is little than I1, as 1.5A.Under this pattern, default a series of charge parameters, allow during as battery charge the highest battery temperature be T2, as 55 degrees centigrade, maximum battery voltage is V2, and detects the electric current of battery.When detected battery temperature more than or equal to default maximum temperature T2, or detected cell voltage is during more than or equal to default ceiling voltage V2, reports an error and returns initial program, red LED 4a is bright; Unusual when detected battery current, as approached 0 o'clock, in conjunction with the testing result of cell voltage, also more than or equal to default ceiling voltage V2, report an error and return initial program as detected cell voltage, red LED 4a is bright.

Owing under the Peak pattern, battery is carried out large current charge fast, may cause damage or unsafe condition occur battery, under the Peak pattern, need every coefficient of battery is carried out stricter requirement.So the relation of the every battery charge coefficient under above-mentioned Peak pattern and the normal mode is as follows:

T1<T2;?V1<V2;

Under normal charge mode, the temperature of battery, electric current, voltage coefficient all meet the setting requirement, and then program proceeds to the judgement to the charging interval downwards.

When charging reaches the longest permission time t2, as 30min, and charging current is less than the defaultelectric current I 3 that is full of, and the expression battery has been full of complete charge,green LED 4b Chang Liang.

As shown in Figure 4, port J3 connects anode, and port J7 connects battery cathode, and port J4 meets the port NTC of battery, port J5, J6 order batteries port.MCU micro-control unit chip in thecontrol circuit 6 is selected U8 for use, after battery inserts charger, U8 judges battery Current Temperatures and voltage by detection port J4, J5 intemperature sensing circuit 8, thevoltage detecting circuit 9, J6, J7, according to current information, whether decision can enter fast charge mode, guarantees charging safety.When meeting when entering the imposing a condition of fast charge mode, can enter fast charge mode automatically, also can be triggered entering byouter triggering signal 13, outer triggering signal can be sensitive switch SW1 shown in Figure 4, also can be other other forms of input signals such as light, electricity, sound.If non-automatic formula enters fast charge mode, when not havingouter triggering signal 13 to trigger, U8 control is charged with normal charge mode.

In the present embodiment, preferably non-automatic formula enters fast charge mode, its process is when triggering sensitive switch SW1, when being the control button 3a on theguidance panel 3, U8 detects and can enter fast charge mode, light-emitting diode D18 in the indicatingcircuit 7 is bright, and indication can enter fast charge mode, and control button 3a's is backlight bright.After sensitive switch SW1 was pressed, U8 Control and Feedback circuit charged according to the fast charging current of setting.Light-emitting diode D18 flicker, fast charge mode, the flicker backlight of control button 3a are being carried out in indication.Under this pattern, U8 monitors the voltage of J4, J5, J6, J7 in real time, enters timing simultaneously, and U8 changes normal charge mode over to automatically by R75 monitoring charger self-temperature under unusual condition.After the quick charge time reached default charging interval, quick charge was finished, light-emitting diode D18 Chang Liang, and the indication quick charge stage finishes, the Chang Liang backlight of control button 3a.The user can pull out battery this moment from charger, be used for need of work.When causing the Halfway Stopping fast charge mode by reasons such as battery temperature or charger temperature, light-emitting diode D18 extinguishes, the indication fast charge mode is unavailable, automatically enter normal charge mode, light-emitting diode D11 flicker in the indicatingcircuit 7, make thegreen LED 4b flicker on theguidance panel 3, normal charge mode is being carried out in indication.After battery is full of, light-emitting diode D11 Chang Liang in the indicatingcircuit 7,green LED 4b Chang Liang indicates whole charging process to finish.

Also can be by detecting battery Current Temperatures and voltage in other execution modes, when meeting when entering the imposing a condition of fast charge mode, can enter fast charge mode automatically, realize the quick charge in short-term of battery.

Can use other triggering modes except sensitive switch to import selection in other execution modes, enter fast charge mode.

The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and distortion, these improvement and distortion also should be considered as protection scope of the present invention.

Claims (12)

1. a charger comprises casing, guidance panel, establishes the groove that can place rechargeable battery on the casing, and the inner chamber that casing constitutes has charging circuit, it is characterized in that,

Described charging circuit has fast charge mode, charges with 1 pair of rechargeable battery of first electric current I,

Described charging circuit also has normal charge mode, charges with 2 pairs of rechargeable batteries of second electric current I,

Described charging circuit also comprises a control circuit, by the switching of two kinds of charge modes of mode selection circuit control,

Described mode selection circuit according to the control signal that described control circuit sends, selects to enter corresponding fast charge mode or normal charge mode.

2. charger according to claim 1 is characterized in that, described first electric current I 1 is greater than second electric current I 2.

3. charger according to claim 1 is characterized in that, described fast charge mode is preset one first charging interval t1, and described normal charge mode is preset one second charging interval t2.

4. charger according to claim 3 is characterized in that, the described first charging interval t1 is less than the second charging interval t2.

5. charger according to claim 1 is characterized in that described charging circuit also comprises indicating circuit, is used to indicate state, the abnormality of charged state, charge mode.

6. charger according to claim 1, it is characterized in that, described charging circuit also comprises temperature sensing circuit, voltage detecting circuit, monitor rechargeable battery Current Temperatures and voltage in real time, and will monitor numerical value and be sent to described control circuit, described control circuit receives and the information of treatment temperature testing circuit, voltage detecting circuit or/and the input information of outside described guidance panel, control the charge mode of described charging circuit, and current state information be sent to described indicating circuit.

7. charger according to claim 1, it is characterized in that described charging circuit also comprises the convert charging circuit, be connected with rechargeable battery, the charge mode that sends according to described mode selection circuit converts AC power to direct voltage, and rechargeable battery is charged.

8. charger according to claim 6 is characterized in that, monitors current temperature of rechargeable battery and magnitude of voltage control automatic switchover charge mode by described control circuit in real time according to described temperature sensing circuit, voltage detecting circuit.

9. charger according to claim 1 is characterized in that, receives outer triggering signal by described control circuit and carries out the charge mode switching.

10. charger according to claim 9 is characterized in that, described outer triggering signal is triggered by the control switch on the guidance panel.

11. charger according to claim 10 is characterized in that, described control switch is a button.

12. charger according to claim 7 is characterized in that, DC-DC power circuit that described convert charging circuit comprises the AC-DC input circuit, be connected with described AC-DC input circuit and the dc voltage output circuit that is connected with described DC-DC power circuit.

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