CN103825254A - Charge and discharge protection device and method for large-scale power lithium battery - Google Patents
Charge and discharge protection device and method for large-scale power lithium battery Download PDFInfo
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- CN103825254A CN103825254A CN201410049345.6A CN201410049345A CN103825254A CN 103825254 A CN103825254 A CN 103825254A CN 201410049345 A CN201410049345 A CN 201410049345A CN 103825254 A CN103825254 A CN 103825254A
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Abstract
The invention relates to the technical field of batteries and provides a charge and discharge protection device for a large-scale power lithium battery. The charge and discharge protection device includes a large-scale power lithium battery, a battery management system, a first temperature detecting device, a second temperature detecting device, a current sensor I, a discharge protection circuit and a charge protection circuit, wherein the battery management system is connected with the discharge protection circuit and the charge protection circuit respectively, the discharge protection circuit and the charge protection circuit are respectively connected between a positive pole and a charge negative pole end of the large-scale power lithium battery, and the first temperature detecting device and the second temperature detecting device are respectively connected with the battery management system; and when detecting that the temperature of the second temperature detecting device or the first temperature detecting device exceeds a certain value, the battery management system controls the discharge protection circuit and the charge protection circuit and enables the discharge protection circuit and the charge protection circuit to be switched on. With the charge and discharge protection device of the large-scale power lithium battery adopted, damage to components or safety accidents which are caused by a large quantity of heat in charge and discharge can be avoided.
Description
Technical field
The invention belongs to battery technology field, relate in particular to a kind of charging and discharging protection device and guard method of large-sized power lithium battery.
Background technology
Large-sized power lithium battery of the prior art diode in the process of charge or discharge can produce very large heat, and the generation of amount of heat can make the components and parts on diode side damage or the accident of blasting, and causes heavy losses.Meanwhile, large-sized power lithium battery can not be avoided well the generation of heat in the time discharging and recharging.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of charging and discharging protection device and guard method of large-sized power lithium battery, is intended to solve the problem that lithium battery can not be effectively protected in the time discharging and recharging.
The present invention realizes like this, a kind of charging and discharging protection device of large-sized power lithium battery, comprise large-sized power lithium battery and battery management system, also comprise the first temperature detection device, the second temperature detection device, current sensor I, discharge prevention circuit and charge protection circuit, described battery management system is all connected with current sensor I, described discharge prevention circuit and described charge protection circuit; Described current sensor I, described discharge prevention circuit and described charge protection circuit are all connected between the anodal of described large-sized power lithium battery and charging negative pole end;
Described the first temperature detection device is connected with described battery management system, for detection of the temperature of the circuit of discharge prevention described in discharge process; Described battery management system detects when the temperature of described the first temperature detection device reaches the high temperature protection value of configuration, and the electric current of current flowing transducer I is discharging current, control described discharge prevention circuit and described charge protection circuit is all connected, make directly to form path between the positive pole of large-sized power lithium battery and charging negative pole end;
Described the second temperature detection device is connected with described battery management system, for detection of the temperature of the circuit of charge protection described in charging process; Described battery management system detects when the temperature of described the second temperature detection device reaches the high temperature protection value of configuration; and the electric current of current flowing transducer I is charging current; control described discharge prevention circuit and described charge protection circuit is all connected, make directly to form path between the positive pole of large-sized power lithium battery and charging negative pole end.
Further, described discharge prevention circuit comprises diode D1 and the first relay, the positive pole of large-sized power lithium battery described in the anodic bonding of described diode D1, the negative electrode of described diode D1 connects one end of the switch S 2 of described the first relay, and in described the first relay, the other end of switch S 2 connects charging negative pole end; One end of the coil of described the first relay connects described battery management system, the other end ground connection of the coil of described the first relay.
Further, described charge protection circuit comprises diode D2 and the second relay, the negative pole end that charges described in the anodic bonding of described diode D2, and the negative electrode of described diode D2 connects one end of the switch S 1 of described the second relay; One end of the switch S 1 of described the second relay connects charging negative pole end, and the other end of the switch S 1 of described the second relay connects the positive pole of described large-sized power lithium battery; One end of the coil of described the second relay connects described battery management system, the other end ground connection of the coil of described the first relay.
Further, described the first temperature detection device is thermistor.
Further, described the second temperature detection device is thermistor.
The method that adopts large-sized power lithium battery charge and discharge protective device as above to protect dynamic lithium battery, comprises the following steps:
Step 1: in the time that current sensor I has detected charging current, and when the temperature that the second temperature detection device detected reaches the high temperature protection value of configuration, discharge prevention circuit and charge protection circuit are all connected, and make the positive pole of large-sized power lithium battery and charge the direct path that forms between negative pole end;
Step 2: between the positive pole of large-sized power lithium battery and charging negative pole end directly when formation path, and the temperature that the second temperature detection device detected is while dropping to the protection recovery value of configuration, disconnects described discharge prevention circuit, and dynamic lithium battery is charged;
Step 3: in the time that current sensor I has detected discharging current, and when the temperature that the first temperature detection device detected reaches the high temperature protection value of configuration, discharge prevention circuit and charge protection circuit are all connected, and make the positive pole of large-sized power lithium battery and charge the direct path that forms between negative pole end;
Step 4: directly form path between the positive pole of large-sized power lithium battery and charging negative pole end time, and the temperature that the first temperature detection device detected is while dropping to the protection recovery value of configuration, and disconnection charge protection circuit, discharges dynamic lithium battery.
Further, after described step 1, also comprise:
Step 5: detect when charging current is converted to discharging current, open immediately the switch S 1 of the second relay in charge protection circuit, simultaneously switch S 2 closures of the first relay in discharge prevention circuit.
Further, after described step 3, also comprise:
Step 6: detect when discharging current is converted to charging current, open immediately the switch S 2 of the first relay in discharge prevention circuit, simultaneously the second switch S 1 closure that continues device in charge protection circuit.
Further, when the discharge prevention circuit in described step 1 and described step 3 and charge protection circuit are all connected, the switch S 2 of the first relay and the switch S 1 of the second relay are all in closure state.
The present invention compared with prior art; beneficial effect is: adopt charge and discharge protecting device can avoid large-sized power lithium battery in the time of charge or discharge, to produce a large amount of heats, can in the time that the heat producing reaches a certain amount of, make electric current not by directly output or input of components and parts simultaneously.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram that the embodiment of the charging and discharging protection device of large-sized power lithium battery of the present invention provides;
Fig. 2 is the flow chart of the guard method of the charging and discharging protection device of large-sized power lithium battery of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, for the present invention's one preferred embodiment, a kind of charging and discharging protection device of large-sized power lithium battery, comprise large-sized power lithium battery 101 and battery management system 102, also comprise the first temperature detection device, the second temperature detection device (not marking in the drawings), current sensor I106, discharge prevention circuit 103 and charge protection circuit, described battery management system 102 is all connected with current sensor I106, described discharge prevention circuit 103 and described charge protection circuit; Described current sensor I106, described discharge prevention circuit 103 and described charge protection circuit are all connected between the anodal of described large-sized power lithium battery and charging negative pole end 1.Described the first temperature detection device is connected with described battery management system 102, for detection of the temperature of the circuit of discharge prevention described in discharge process.Described battery management system 102 detects when the temperature of described the first temperature detection device reaches the high temperature protection value of configuration; and the electric current of current flowing transducer I106 is discharging current; control described discharge prevention circuit and described charge protection circuit is all connected, make directly to form path between the positive pole of large-sized power lithium battery and charging negative pole end.Described the second temperature detection device is connected with described battery management system 102, for detection of the temperature of the circuit of charge protection described in charging process.Described battery management system detects when the temperature of described the second temperature detection device reaches the high temperature protection value of configuration; and the electric current of current flowing transducer I106 is charging current; control described discharge prevention circuit and described charge protection circuit is all connected, make directly to form path between the positive pole of large-sized power lithium battery and charging negative pole end 1.Described the first temperature detection device is closely connected physically with discharge prevention circuit, but in electric property in state of insulation.Equally, described the second temperature detection device is closely connected physically with charge protection circuit, but in electric property in state of insulation.Battery management system 102(Battery Management System, BMS) be mainly used in improving the utilance of battery, prevent that overcharging from appearring in battery and the phenomenon of overdischarge, extend the useful life of battery, the state of monitoring battery.
Described discharge prevention circuit comprises diode D1 and the first relay 105, the positive pole of large-sized power lithium battery 101 described in the anodic bonding of described diode D1, the negative electrode of described diode D1 connects one end of the switch S 2 of described the first relay 105, and in described the first relay 105, the other end of switch S 2 connects charging negative pole end 1; One end of the coil of described the first relay 105 connects described battery management system, the other end ground connection of the coil of described the first relay.
Described charge protection circuit comprises diode D2 and the second relay 104, the negative pole end that charges described in the anodic bonding of described diode D2, and the negative electrode of described diode D2 connects one end of the switch S 1 of described the second relay 104; One end of the switch S 1 of described the second relay 104 connects charging negative pole end 1, and the other end of the switch S 1 of described the second relay 104 connects the positive pole of described large-sized power lithium battery 101; One end of the coil of described the second relay 104 connects described battery management system 102, the other end ground connection of the coil of described the first relay 105.
Described the first temperature detection device and described the second temperature detection device are respectively thermistor R1 and thermistor R2, and the two ends of thermistor R1 connect respectively the two ends of described diode D1, and the two ends of thermistor R2 connect respectively the two ends of described diode D2.
When charging, switch S 1 closure, charging current flows through from diode D2, charges to large-scale lithium battery 101 through closed switch S 1 and current sensor I106.When electric current flows through charge protection circuit; can produce heat; because thermistor R2 is closely connected with diode D2 physically; but insulate in electric property; in the time that charge protection circuit produces heat, thermistor R2 also can produce heat, in the time that heat reaches certain value, reaches the high temperature protection value of configuration; thermistor R2 can control the second relay 105 and make switch S 2 closures, and now directly flow through closed switch S 2 and switch S 1 of charging current charged to large-scale lithium battery 101.In the time that thermistor R2 detects that temperature drops to the protection recovery value of configuration, control switch S2 disconnects.In the time that current sensor I106 detects that the sense of current is converted to electric discharge by charging, immediately switch S 1 is opened to closing switch S2.
When electric discharge, switch S 2 closures, discharging current flows through from current sensor I106 and diode D1, discharges to the equipment being connected with large-scale lithium battery 101 through closed switch S 2.When flowing through discharge prevention circuit, electric current can produce heat; because thermistor R2 is closely connected with diode D1 physically; but insulate in electric property; in the time that discharge prevention circuit produces heat, thermistor R1 also can produce heat; in the time that heat reaches certain value; reach the high temperature protection value of configuration; thermistor R1 can control the first relay 104 and make switch S 1 closure, and now the discharging current closed switch S 1 of directly flowing through is discharged to the equipment being connected with large-scale lithium battery 101 with switch S 2.In the time that thermistor R1 detects that temperature drops to the protection recovery value of configuration, control switch S1 disconnects.In the time that current sensor I106 detects that the sense of current is converted to charging by electric discharge, immediately switch S 2 is opened to closing switch S1.
As shown in Figure 2, the method that adopts above-mentioned large-sized power lithium battery charge and discharge protective device to protect dynamic lithium battery, comprise the following steps: step 1: in the time that current sensor I106 has detected charging current, and when the temperature that the second temperature detection device detected reaches the high temperature protection value of configuration, discharge prevention circuit and charge protection circuit are all connected, and make the positive pole of large-sized power lithium battery and charge the direct path that forms between negative pole end; Step 2: between the positive pole of large-sized power lithium battery and charging negative pole end directly when formation path, and the temperature that the second temperature detection device detected is while dropping to the protection recovery value of configuration, disconnects described discharge prevention circuit, and dynamic lithium battery is charged; Step 3: in the time that current sensor I106 has detected discharging current, and when the temperature that the first temperature detection device detected reaches the high temperature protection value of configuration, discharge prevention circuit and charge protection circuit are all connected, and make the positive pole of large-sized power lithium battery and charge the direct path that forms between negative pole end; Step 4: directly form path between the positive pole of large-sized power lithium battery and charging negative pole end time, and the temperature that the first temperature detection device detected is while dropping to the protection recovery value of configuration, and disconnection charge protection circuit, discharges dynamic lithium battery.
When discharge prevention circuit in described step 1 and described step 3 and charge protection circuit are all connected, the switch S 2 of the first relay 105 and the switch S 1 of the second relay 104 are all in closure state.
After described step 1, also comprise: step 5: detect when charging current is converted to discharging current, open immediately the switch S 1 of the second relay 104 in charge protection circuit, simultaneously switch S 2 closures of the first relay 105 in discharge prevention circuit.
After described step 3, also comprise: step 6: detect when discharging current is converted to charging current, open immediately the switch S 2 of the first relay 105 in discharge prevention circuit, simultaneously continue switch S 1 closure of device 104 of second in charge protection circuit.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. the charging and discharging protection device of a large-sized power lithium battery, comprise large-sized power lithium battery and battery management system, it is characterized in that, also comprise the first temperature detection device, the second temperature detection device, current sensor I, discharge prevention circuit and charge protection circuit, described battery management system is all connected with current sensor I, described discharge prevention circuit and described charge protection circuit; Described current sensor I, described discharge prevention circuit and described charge protection circuit are all connected between the anodal of described large-sized power lithium battery and charging negative pole end;
Described the first temperature detection device is connected with described battery management system, for detection of the temperature of the circuit of discharge prevention described in discharge process; Described battery management system detects when the temperature of described the first temperature detection device reaches the high temperature protection value of configuration, and the electric current of current flowing transducer I is discharging current, control described discharge prevention circuit and described charge protection circuit is all connected, make directly to form path between the positive pole of large-sized power lithium battery and charging negative pole end;
Described the second temperature detection device is connected with described battery management system, for detection of the temperature of the circuit of charge protection described in charging process; Described battery management system detects when the temperature of described the second temperature detection device reaches the high temperature protection value of configuration; and the electric current of current flowing transducer I is charging current; control described discharge prevention circuit and described charge protection circuit is all connected, make directly to form path between the positive pole of large-sized power lithium battery and charging negative pole end.
2. charging and discharging protection device according to claim 1, it is characterized in that, described discharge prevention circuit comprises diode D1 and the first relay, the positive pole of large-sized power lithium battery described in the anodic bonding of described diode D1, the negative electrode of described diode D1 connects one end of the switch S 2 of described the first relay, and in described the first relay, the other end of switch S 2 connects charging negative pole end; One end of the coil of described the first relay connects described battery management system, the other end ground connection of the coil of described the first relay.
3. charging and discharging protection device according to claim 1 and 2, it is characterized in that, described charge protection circuit comprises diode D2 and the second relay, the negative pole end that charges described in the anodic bonding of described diode D2, the negative electrode of described diode D2 connects one end of the switch S 1 of described the second relay; One end of the switch S 1 of described the second relay connects charging negative pole end, and the other end of the switch S 1 of described the second relay connects the positive pole of described large-sized power lithium battery; One end of the coil of described the second relay connects described battery management system, the other end ground connection of the coil of described the first relay.
4. charging and discharging protection device according to claim 1, is characterized in that, described the first temperature detection device is thermistor.
5. charging and discharging protection device according to claim 1, is characterized in that, described the second temperature detection device is thermistor.
6. the method that adopts the arbitrary described large-sized power lithium battery charge and discharge protective device of claim 1 to 5 to protect dynamic lithium battery, is characterized in that, comprises the following steps:
Step 1: in the time that current sensor I has detected charging current, and when the temperature that the second temperature detection device detected reaches the high temperature protection value of configuration, discharge prevention circuit and charge protection circuit are all connected, and make the positive pole of large-sized power lithium battery and charge the direct path that forms between negative pole end;
Step 2: between the positive pole of large-sized power lithium battery and charging negative pole end directly when formation path, and the temperature that the second temperature detection device detected is while dropping to the protection recovery value of configuration, disconnects described discharge prevention circuit, and dynamic lithium battery is charged;
Step 3: in the time that current sensor I has detected discharging current, and when the temperature that the first temperature detection device detected reaches the high temperature protection value of configuration, discharge prevention circuit and charge protection circuit are all connected, and make the positive pole of large-sized power lithium battery and charge the direct path that forms between negative pole end;
Step 4: directly form path between the positive pole of large-sized power lithium battery and charging negative pole end time, and the temperature that the first temperature detection device detected is while dropping to the protection recovery value of configuration, and disconnection charge protection circuit, discharges dynamic lithium battery.
7. the guard method of large-sized power lithium battery charge and discharge protective device according to claim 6, is characterized in that, after described step 1, also comprises:
Step 5: detect when charging current is converted to discharging current, open immediately the switch S 1 of the second relay in charge protection circuit, simultaneously switch S 2 closures of the first relay in discharge prevention circuit.
8. the guard method of large-sized power lithium battery charge and discharge protective device according to claim 6, is characterized in that, after described step 3, also comprises:
Step 6: detect when discharging current is converted to charging current, open immediately the switch S 2 of the first relay in discharge prevention circuit, simultaneously the second switch S 1 closure that continues device in charge protection circuit.
9. the guard method of large-sized power lithium battery charge and discharge protective device according to claim 6; it is characterized in that; when discharge prevention circuit in described step 1 and described step 3 and charge protection circuit are all connected, the switch S 2 of the first relay and the switch S 1 of the second relay are all in closure state.
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| CN201410049345.6A CN103825254B (en) | 2014-02-13 | 2014-02-13 | The charging and discharging protection device of a kind of large-sized power lithium battery and guard method |
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| CN201410049345.6A CN103825254B (en) | 2014-02-13 | 2014-02-13 | The charging and discharging protection device of a kind of large-sized power lithium battery and guard method |
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| CN103825254B CN103825254B (en) | 2016-10-05 |
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Cited By (4)
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| CN106935921A (en) * | 2017-02-08 | 2017-07-07 | 东莞市云帆电子科技有限公司 | A kind of method of conventional batteries low temperature environment discharge and recharge |
| CN110957703A (en) * | 2018-09-26 | 2020-04-03 | 株式会社斯巴鲁 | Main relay protection device |
| CN110962605A (en) * | 2018-09-28 | 2020-04-07 | 株式会社斯巴鲁 | Junction box control device |
| CN112072192A (en) * | 2020-09-15 | 2020-12-11 | 深圳市雄韬锂电有限公司 | Lithium battery management system and device |
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| CN110962605A (en) * | 2018-09-28 | 2020-04-07 | 株式会社斯巴鲁 | Junction box control device |
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| CN112072192A (en) * | 2020-09-15 | 2020-12-11 | 深圳市雄韬锂电有限公司 | Lithium battery management system and device |
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