CN202772619U - Circuit with automatic charging/discharging protection function - Google Patents
Circuit with automatic charging/discharging protection function Download PDFInfo
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- CN202772619U CN202772619U CN 201220383478 CN201220383478U CN202772619U CN 202772619 U CN202772619 U CN 202772619U CN 201220383478 CN201220383478 CN 201220383478 CN 201220383478 U CN201220383478 U CN 201220383478U CN 202772619 U CN202772619 U CN 202772619U
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- battery pack
- triode
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- charging
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Abstract
The utility model discloses a circuit with an automatic charging/discharging protection function. The circuit comprises a serially-connected battery pack, a voltage acquisition circuit, a charging/discharging protection circuit, a control module, a charger and an electrical load. One end of the voltage acquisition circuit is connected with positive and negative electrodes of each single battery of the battery pack via a voltage-detection wire harness, and the other end is connected with an input port of the control module. One end of the electrical load is connected with a total positive electrode of the battery pack, and the other end is connected with a discharging negative port. One end of the charger is connected with the total positive electrode of the battery pack, and the other end is connected with a charging negative port. Two control ends of the charging/discharging protection circuit are connected with two output ports of the control module, respectively. The charging/discharging protection circuit comprises a charging protection circuit, a discharging protection circuit and a charging/discharging relay control circuit. The charging/discharging relay control circuit adopts triodes to drive a charging relay and a discharging relay respectively. The circuit of the utility model is small in size, low in cost and high in safety and does not require manual operation, thereby reducing the job hazard for operators.
Description
Technical field
The utility model relates to the electric vehicle engineering field, and especially the charge-discharge protection circuit of electric automobile lithium battery is specially a kind of circuit with auto charge and discharge defencive function.
Background technology
The key technology of Development of Electric Vehicles is dynamic lithium battery.A large amount of lithium batteries are composed in series the lithium battery group, for electric automobile provides power.The lithium battery energy density is high, is difficult to guarantee the fail safe of battery, and under the state that overcharges, energy surplus after battery temperature rises so electrolyte decomposition produces gas, presses the danger that rises and produce spontaneous combustion and break in easily making; Otherwise under the state of over-discharge can, electrolyte reduces chargeable number of times because decomposition causes battery behavior and degradation of breakdown voltage.Therefore lithium battery overcharge and the protection of over-discharge can very important, so should design a kind of protective circuit with automatic inflatable/Electricity Functional.
At present, single-lithium-battery pond charge-discharge protection circuit is comparative maturity, is illustrated in figure 1 as common single-lithium-battery pond charging/discharging voltage detection module schematic diagram.This modular circuit comprises overcharged voltage comparator 1, and comparator 2 is pressed in overdischarge, and logic is judged control circuit, and charge switch and discharge switch etc. form lithium battery and detect charge-discharge protection circuit.Detection comparator 1,2 detect the current potential of lithium battery B1 after, current potential and detection comparator 1 with detected lithium battery, 2 built-in voltage references compare, then comparative result is exported to logic and judged control circuit, logic is judged the break-make that control circuit removes to control charge switch and discharge switch according to numerical value and the control program of prior setting.
When normally discharging and recharging work: the logic of single-lithium-battery pond charging/discharging voltage detection module is judged control circuit output pin C0, and DO is high level, makes the equal conducting of charge switch and discharge switch, and single battery carries out work by discharging and recharging normally.When if single-lithium-battery pond charging/discharging voltage detection module detects overcharged voltage or overdischarge pressure; logic judges that control circuit output pin C0 or D0 are low level; charge switch or discharge switch are turn-offed; thereby realize single-lithium-battery pond overcharged voltage or overdischarge pressure etc. is controlled and detected, reach the safety of protection lithium battery use and prolong the useful life of lithium battery group.
Because of the single battery finite capacity, voltage is limited, is difficult to satisfy user's demand.Therefore lithium battery generally adopts connection in series-parallel to use, and forms the connection in series-parallel battery pack, to increase the power output of lithium battery, satisfies user's actual demand.At present, the lithium battery group discharges and recharges the withstand voltage only 24V of safety integrated circuit, and the voltage of multisection lithium battery group surpasses 24V, and then the safeguard protection integrated circuit is difficult for using.The lithium battery group is discharged and recharged the safeguard protection integrated circuit only can protect about 8 joints, if the single battery number is controlled cost higher more than then protection difficulty of 8 joints in the lithium battery group.
The utility model content
Carry out the problem of charge and discharge protecting for present lithium battery group; the utility model proposes a kind of circuit that simply has the auto charge and discharge defencive function; and it is little to have volume; cost is low; safe characteristics; in addition, it does not need manually to go operation, and the work that has therefore reduced operating personnel is dangerous.
The technical solution adopted in the utility model is:
Circuit with auto charge and discharge defencive function, it is characterized in that: the battery pack that includes series connection, voltage collection circuit, charge-discharge protection circuit, control module, charger and use electric loading, voltage collection circuit one end is connected with the both positive and negative polarity of each cell of battery pack respectively by the voltage detecting winding displacement, the other end links to each other with the input port C1 of control module, link to each other with the total anodal Vbat+ of battery pack with electric loading one end F+, other end F-links to each other with discharge negative terminal mouth DIS-, charger one end P+ links to each other with the total anodal Vbat+ of battery pack, other end P-links to each other with charging negative terminal mouth CHG-, two control ends of charge-discharge protection circuit respectively with two output port CHGCTRL of control module, DISCTRL links to each other; Described charge-discharge protection circuit includes charge protector, discharge protection circuit and discharges and recharges control relay circuit, discharging and recharging control relay circuit adopts respectively triode Q1, Q2 to drive charge relay RL1, discharge relay R L2, the coil of charge relay RL1, discharge relay R L2 is received between the collector electrode and power supply VCC of triode Q1, Q2 control module employing MCU single-chip microcomputer as the load of the collector electrode of triode Q1, Q2 respectively; The stagnation pressure that detects battery pack when voltage collection circuit is crossed when low, MCU single-chip microcomputer output port CHGCTRL sends high level, this voltage signal is received the base stage of the driving triode Q1 of charge relay through current-limiting resistance R1, triode Q1 conducting, thereby charge relay RL1 adhesive, the voltage of the anodal Vbat+ of battery pack is through fuse F1, charge relay RL1, the current-limiting resistance R3 of charging indicator light DS1 and charge protector is connected to charge switch triode Q3, on the base stage of Q5, make charging triode Q3, the Q5 conducting, the negative pole of battery pack, by the anti-reverse diode D3 that charges, D5 and charging triode Q3, Q4 also is connected to the negative pole P-of charger by charging negative terminal mouth CHG-, the anodal P+ of charger connects the total anodal Vbat+ of battery pack, and charger begins to batteries charging; When battery voltage reaches the threshold value of setting, MCU single-chip microcomputer output port CHGCTRL output low level, this voltage signal is received the base stage of the driving triode Q1 of charge relay RL1 through current-limiting resistance R1, triode Q1 cut-off, coil current among the charge relay RL1 can not suddenly change, produce one larger, negative lower positive inverse electromotive force on the polarity, electric current flows back to the upper end of the coil of charge relay RL1 through sustained diode 1 from the lower end of the coil of charge relay RL1, energy in the coil of charge relay RL1 is discharged, make triode Q1 collector electrode voltage over the ground be no more than VCC+0.7V, simultaneously, because charge relay RL1 turn-offs, this moment, the stagnation pressure Vbat+ of battery pack can not provide one to make charging triode Q3, the voltage signal of Q5 conducting, charging triode Q3, the Q5 cut-off, the negative pole Vbat-of battery pack and the negative pole P-of charger disconnect, and charging cycle finishes;
The stagnation pressure that detects battery pack when voltage collection circuit is when reaching rated value, MCU single-chip microcomputer output port DISCTRL exports high level, this voltage signal is received the base stage of the driving triode Q2 of discharge relay R L2 through current-limiting resistance R2, triode Q2 conducting, thereby charge relay RL2 adhesive, the voltage of the anodal Vbat+ of battery pack is through fuse F1, charge relay RL2, the current-limiting resistance R4 of charging indicator light DS2 and discharge protection circuit is connected to discharge switch triode Q4, on the base stage of Q6, discharge diode Q4, the Q6 conducting, the negative pole of battery pack is by discharge-preventing reversal connection diode D4, D6 and discharge diode Q4, Q6 also is connected to negative pole F-with electric loading by charging negative terminal mouth DIS-, connect the total anodal Vbat+ of battery pack with the anodal F+ of electric loading, battery pack begins to the electricity consumption load supplying; When battery voltage is crossed low and is reached the threshold value of setting in the MCU single-chip microcomputer, MCU single-chip microcomputer output port DISCTRL output low level, this voltage signal is received the base stage of the driving triode Q2 of discharge relay R L2 through current-limiting resistance R2, triode Q2 cut-off, coil current among the charge relay RL2 can not suddenly change, produce one larger, negative lower positive inverse electromotive force on the polarity, electric current flows back to the upper end of the coil of charge relay RL2 through sustained diode 2 from the lower end of the coil of charge relay RL2, energy in the coil of charge relay RL2 is discharged, make triode Q2 collector electrode voltage over the ground be no more than VCC+0.7V, simultaneously, because discharge relay R L2 turn-offs, the stagnation pressure Vbat+ of battery pack can not provide one to make discharge diode Q4, the voltage signal of Q6 conducting, discharge diode Q4, the Q6 cut-off, the negative pole Vbat-of battery pack with disconnect the discharge cycles end with the negative pole F-of electric loading.
Have existing technology to compare, advantage applies of the present utility model exists:
1, realized that automatic control discharges and recharges, need not manual operation;
2, circuit volume of the present utility model is little, and cost is low, so practical;
3, real-time strengthens: voltage collection circuit can detect the stagnation pressure of battery pack in real time, controls corresponding protective circuit by control module;
4, realized to the lithium battery group the function of charge and discharge protecting.
Description of drawings
Fig. 1 is the schematic diagram of single battery charge-discharge protection circuit.
Fig. 2 is the schematic diagram of lithium battery group auto charge and discharge protective circuit.
Embodiment
As shown in Figure 2, a kind of circuit with auto charge and discharge defencive function, include the battery pack 1 of series connection, voltage collection circuit 2, charge-discharge protection circuit 3, control module 4, charger 5 and with electric loading 6, voltage collection circuit 2 one ends are connected with the both positive and negative polarity of each cell B1-Bn of battery pack 1 respectively by voltage detecting winding displacement 7, the other end links to each other with the input port C1 of control module 4, link to each other with battery pack 1 total anodal Vbat+ with electric loading 6 one end F+, other end F-links to each other with discharge negative terminal mouth DIS-, charger 5 one end P+ link to each other with battery pack 1 total anodal Vbat+, other end P-links to each other with charging negative terminal mouth CHG-, two control ends of charge-discharge protection circuit 3 respectively with two output port CHGCTRL of control module 4, DISCTRL links to each other; Charge-discharge protection circuit 3 includes charge protector 8, discharge protection circuit 9 and discharges and recharges control relay circuit 10, discharging and recharging control relay circuit 10 adopts respectively triode Q1, Q2 to drive charge relay RL1, discharge relay R L2, the coil of charge relay RL1, discharge relay R L2 is received between the collector electrode and power supply VCC of triode Q1, Q2 control module 4 employing MCU single-chip microcomputers as the load of the collector electrode of triode Q1, Q2 respectively;
Its course of work is: the stagnation pressure that detects battery pack 1 when voltage collection circuit 2 is crossed when low, MCU single-chip microcomputer output port CHGCTRL sends high level, this voltage signal is received the base stage of the driving triode Q1 of charge relay through current-limiting resistance R1, triode Q1 conducting, thereby charge relay RL1 adhesive, the voltage of the anodal Vbat+ of battery pack 1 is through fuse F1, charge relay RL1, the current-limiting resistance R3 of charging indicator light DS1 and charge protector 8 is connected to charge switch triode Q3, on the base stage of Q5, make charging triode Q3, the Q5 conducting, the negative pole of battery pack, by the anti-reverse diode D3 that charges, D5 and charging triode Q3, Q4 also is connected to the negative pole P-of charger by charging negative terminal mouth CHG-, the anodal P+ of charger 5 connects the total anodal Vbat+ of battery pack, and charger 5 begins to battery pack 1 charging; When battery pack 1 voltage reaches the threshold value of setting, MCU single-chip microcomputer output port CHGCTRL output low level, this voltage signal is received the base stage of the driving triode Q1 of charge relay RL1 through current-limiting resistance R1, triode Q1 cut-off, coil current among the charge relay RL1 can not suddenly change, produce one larger, negative lower positive inverse electromotive force on the polarity, electric current flows back to the upper end of the coil of charge relay RL1 through sustained diode 1 from the lower end of the coil of charge relay RL1, energy in the coil of charge relay RL1 is discharged, make triode Q1 collector electrode voltage over the ground be no more than VCC+0.7V, simultaneously, because charge relay RL1 turn-offs, this moment, the stagnation pressure Vbat+ of battery pack 1 can not provide one to make charging triode Q3, the voltage signal of Q5 conducting, charging triode Q3, the Q5 cut-off, the negative pole Vbat-of battery pack and the negative pole P-of charger disconnect, and charging cycle finishes;
The stagnation pressure that detects battery pack 1 when voltage collection circuit 2 is when reaching rated value, MCU single-chip microcomputer output port DISCTRL exports high level, this voltage signal is received the base stage of the driving triode Q2 of discharge relay R L2 through current-limiting resistance R2, triode Q2 conducting, thereby charge relay RL2 adhesive, the voltage of the anodal Vbat+ of battery pack 1 is through fuse F1, charge relay RL2, the current-limiting resistance R4 of charging indicator light DS2 and discharge protection circuit 9 is connected to discharge switch triode Q4, on the base stage of Q6, discharge diode Q4, the Q6 conducting, the negative pole of battery pack 1 is by discharge-preventing reversal connection diode D4, D6 and discharge diode Q4, Q6 also is connected to negative pole F-with electric loading 6 by charging negative terminal mouth DIS-, the total anodal Vbat+ that connects battery pack with the anodal F+ of electric loading 6, battery pack 1 begins to powering with electric loading 6; When battery pack 1 brownout and when reaching the threshold value of setting in the MCU single-chip microcomputer, MCU single-chip microcomputer output port DISCTRL output low level, this voltage signal is received the base stage of the driving triode Q2 of discharge relay R L2 through current-limiting resistance R2, triode Q2 cut-off, coil current among the charge relay RL2 can not suddenly change, produce one larger, negative lower positive inverse electromotive force on the polarity, electric current flows back to the upper end of the coil of charge relay RL2 through sustained diode 2 from the lower end of the coil of charge relay RL2, energy in the coil of charge relay RL2 is discharged, make triode Q2 collector electrode voltage over the ground be no more than VCC+0.7V, simultaneously, because discharge relay R L2 turn-offs, the stagnation pressure Vbat+ of battery pack 1 can not provide one to make discharge diode Q4, the voltage signal of Q6 conducting, discharge diode Q4, the Q6 cut-off, the negative pole Vbat-of battery pack 1 with disconnect the discharge cycles end with the negative pole F-of electric loading.
Claims (1)
1. circuit with auto charge and discharge defencive function, it is characterized in that: the battery pack that includes series connection, voltage collection circuit, charge-discharge protection circuit, control module, charger and use electric loading, voltage collection circuit one end is connected with the both positive and negative polarity of each cell of battery pack respectively by the voltage detecting winding displacement, the other end links to each other with the input port C1 of control module, link to each other with the total anodal Vbat+ of battery pack with electric loading one end F+, other end F-links to each other with discharge negative terminal mouth DIS-, charger one end P+ links to each other with the total anodal Vbat+ of battery pack, other end P-links to each other with charging negative terminal mouth CHG-, two control ends of charge-discharge protection circuit respectively with two output port CHGCTRL of control module, DISCTRL links to each other; Described charge-discharge protection circuit includes charge protector, discharge protection circuit and discharges and recharges control relay circuit, discharging and recharging control relay circuit adopts respectively triode Q1, Q2 to drive charge relay RL1, discharge relay R L2, the coil of charge relay RL1, discharge relay R L2 is received between the collector electrode and power supply VCC of triode Q1, Q2 control module employing MCU single-chip microcomputer as the load of the collector electrode of triode Q1, Q2 respectively; The stagnation pressure that detects battery pack when voltage collection circuit is crossed when low, MCU single-chip microcomputer output port CHGCTRL sends high level, this voltage signal is received the base stage of the driving triode Q1 of charge relay through current-limiting resistance R1, triode Q1 conducting, thereby charge relay RL1 adhesive, the voltage of the anodal Vbat+ of battery pack is through fuse F1, charge relay RL1, the current-limiting resistance R3 of charging indicator light DS1 and charge protector is connected to charge switch triode Q3, on the base stage of Q5, make charging triode Q3, the Q5 conducting, the negative pole of battery pack, by the anti-reverse diode D3 that charges, D5 and charging triode Q3, Q4 also is connected to the negative pole P-of charger by charging negative terminal mouth CHG-, the anodal P+ of charger connects the total anodal Vbat+ of battery pack, and charger begins to batteries charging; When battery voltage reaches the threshold value of setting, MCU single-chip microcomputer output port CHGCTRL output low level, this voltage signal is received the base stage of the driving triode Q1 of charge relay RL1 through current-limiting resistance R1, triode Q1 cut-off, coil current among the charge relay RL1 can not suddenly change, produce one larger, negative lower positive inverse electromotive force on the polarity, electric current flows back to the upper end of the coil of charge relay RL1 through sustained diode 1 from the lower end of the coil of charge relay RL1, energy in the coil of charge relay RL1 is discharged, make triode Q1 collector electrode voltage over the ground be no more than VCC+0.7V, simultaneously, because charge relay RL1 turn-offs, this moment, the stagnation pressure Vbat+ of battery pack can not provide one to make charging triode Q3, the voltage signal of Q5 conducting, charging triode Q3, the Q5 cut-off, the negative pole Vbat-of battery pack and the negative pole P-of charger disconnect, and charging cycle finishes; The stagnation pressure that detects battery pack when voltage collection circuit is when reaching rated value, MCU single-chip microcomputer output port DISCTRL exports high level, this voltage signal is received the base stage of the driving triode Q2 of discharge relay R L2 through current-limiting resistance R2, triode Q2 conducting, thereby charge relay RL2 adhesive, the voltage of the anodal Vbat+ of battery pack is through fuse F1, charge relay RL2, the current-limiting resistance R4 of charging indicator light DS2 and discharge protection circuit is connected to discharge switch triode Q4, on the base stage of Q6, discharge diode Q4, the Q6 conducting, the negative pole of battery pack is by discharge-preventing reversal connection diode D4, D6 and discharge diode Q4, Q6 also is connected to negative pole F-with electric loading by charging negative terminal mouth DIS-, connect the total anodal Vbat+ of battery pack with the anodal F+ of electric loading, battery pack begins to the electricity consumption load supplying; When battery voltage is crossed low and is reached the threshold value of setting in the MCU single-chip microcomputer, MCU single-chip microcomputer output port DISCTRL output low level, this voltage signal is received the base stage of the driving triode Q2 of discharge relay R L2 through current-limiting resistance R2, triode Q2 cut-off, coil current among the charge relay RL2 can not suddenly change, produce one larger, negative lower positive inverse electromotive force on the polarity, electric current flows back to the upper end of the coil of charge relay RL2 through sustained diode 2 from the lower end of the coil of charge relay RL2, energy in the coil of charge relay RL2 is discharged, make triode Q2 collector electrode voltage over the ground be no more than VCC+0.7V, simultaneously, because discharge relay R L2 turn-offs, the stagnation pressure Vbat+ of battery pack can not provide one to make discharge diode Q4, the voltage signal of Q6 conducting, discharge diode Q4, the Q6 cut-off, the negative pole Vbat-of battery pack with disconnect the discharge cycles end with the negative pole F-of electric loading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220383478 CN202772619U (en) | 2012-08-03 | 2012-08-03 | Circuit with automatic charging/discharging protection function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220383478 CN202772619U (en) | 2012-08-03 | 2012-08-03 | Circuit with automatic charging/discharging protection function |
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| CN202772619U true CN202772619U (en) | 2013-03-06 |
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| CN 201220383478 Withdrawn - After Issue CN202772619U (en) | 2012-08-03 | 2012-08-03 | Circuit with automatic charging/discharging protection function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832660A (en) * | 2012-08-03 | 2012-12-19 | 安徽力高新能源技术有限公司 | Circuit with automatic charging and discharging protection function |
| CN106058999A (en) * | 2016-07-11 | 2016-10-26 | 单专年 | Precise set power source voltage control device |
| CN108303656A (en) * | 2018-02-28 | 2018-07-20 | 长沙优力电驱动***有限公司 | Battery pack charge-discharge testing device |
| CN108649636A (en) * | 2018-05-21 | 2018-10-12 | 杭州云动智能汽车技术有限公司 | High-power charge-discharge control circuit applied to car-mounted terminal |
| CN112769185A (en) * | 2020-12-31 | 2021-05-07 | 李砚泉 | Battery pack charge and discharge control device, control method and battery device |
-
2012
- 2012-08-03 CN CN 201220383478 patent/CN202772619U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832660A (en) * | 2012-08-03 | 2012-12-19 | 安徽力高新能源技术有限公司 | Circuit with automatic charging and discharging protection function |
| CN102832660B (en) * | 2012-08-03 | 2014-10-08 | 安徽力高新能源技术有限公司 | Circuit with automatic charging and discharging protection function |
| CN106058999A (en) * | 2016-07-11 | 2016-10-26 | 单专年 | Precise set power source voltage control device |
| CN108303656A (en) * | 2018-02-28 | 2018-07-20 | 长沙优力电驱动***有限公司 | Battery pack charge-discharge testing device |
| CN108303656B (en) * | 2018-02-28 | 2024-04-09 | 长沙优力电驱动***有限公司 | Battery pack charge-discharge testing device |
| CN108649636A (en) * | 2018-05-21 | 2018-10-12 | 杭州云动智能汽车技术有限公司 | High-power charge-discharge control circuit applied to car-mounted terminal |
| CN112769185A (en) * | 2020-12-31 | 2021-05-07 | 李砚泉 | Battery pack charge and discharge control device, control method and battery device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130306 Effective date of abandoning: 20141008 |
|
| RGAV | Abandon patent right to avoid regrant |