CN103825254B - The charging and discharging protection device of a kind of large-sized power lithium battery and guard method - Google Patents
The charging and discharging protection device of a kind of large-sized power lithium battery and guard method Download PDFInfo
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- CN103825254B CN103825254B CN201410049345.6A CN201410049345A CN103825254B CN 103825254 B CN103825254 B CN 103825254B CN 201410049345 A CN201410049345 A CN 201410049345A CN 103825254 B CN103825254 B CN 103825254B
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- charging
- lithium battery
- relay
- discharge
- detection device
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Abstract
The present invention is applicable to cell art; provide the charging and discharging protection device of a kind of large-sized power lithium battery; including large-sized power lithium battery, battery management system, the first temperature detection device, the second temperature detection device, current sensor I, discharge prevention circuit and charge protection circuit, battery management system is all connected with discharge prevention circuit and charge protection circuit；Described discharge prevention circuit and described charge protection circuit are both connected between the positive pole of described large-sized power lithium battery and charging negative pole end；Described first temperature detection device and the second temperature detection device are all connected with described battery management system; when battery management system detects that the temperature of the second temperature detection device or the first temperature detection device exceedes certain value, control described discharge prevention circuit and described charge protection circuit is turned on.The discharge and recharge holding means of described large-sized power lithium battery can be avoided charging to produce amount of heat when can discharge and cause the damage of device or the generation of security incident.
Description
Technical field
The invention belongs to cell art, particularly relate to the charge and discharge protecting dress of a kind of large-sized power lithium battery
Put and guard method.
Background technology
Large-sized power lithium battery of the prior art diode during charge or discharge can produce very big
Heat, the generation of amount of heat can make component damage or the generation explosion accident on diode side, cause tight
Heavily lose.Meanwhile, large-sized power lithium battery can not avoid the generation of heat well when discharge and recharge.
Content of the invention
The technical problem to be solved is that the charge and discharge protecting providing a kind of large-sized power lithium battery fills
Put and guard method, it is intended to solve the problem that lithium battery can not be effectively protected when discharge and recharge.
The present invention is achieved in that the charging and discharging protection device of a kind of large-sized power lithium battery, including large-scale
Dynamic lithium battery and battery management system, also include 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 and current sense
Device I, described discharge prevention circuit are connected with described charge protection circuit；Described current sensor I, described
Discharge prevention circuit and described charge protection circuit are both connected to positive pole and the charging of described large-sized power lithium battery
Between negative pole end；
Described first temperature detection device is connected with described battery management system, is used for detecting in discharge process
The temperature of described discharge prevention circuit；Described battery management system detects described first temperature detection device
When temperature reaches the high temperature protection value of configuration, and the electric current flowing through current sensor I is discharge current, controls institute
State discharge prevention circuit and described charge protection circuit is turned on, make positive pole and the charging of large-sized power lithium battery
Directly form path between negative pole end；
Described second temperature detection device is connected with described battery management system, is used for detecting in charging process
The temperature of described charge protection circuit；Described battery management system detects described second temperature detection device
When temperature reaches the high temperature protection value of configuration, and the electric current flowing through current sensor I is charging current, controls institute
State discharge prevention circuit and described charge protection circuit is turned on, make positive pole and the charging of large-sized power lithium battery
Directly form path between negative pole end.
Further, described discharge prevention circuit includes diode D1 and the first relay, described diode
The anode of D1 connects the positive pole of described large-sized power lithium battery, and the negative electrode of described diode D1 connects described the
One end of the switch S2 of one relay, the other end of described first relay breaker in middle S2 connects charging negative pole
End；One end of the coil of described first relay connects described battery management system, described first relay
The other end ground connection of coil.
Further, described charge protection circuit includes diode D2 and the second relay, described diode
The anode of D2 connects described charging negative pole end, and the negative electrode of described diode D2 connects described second relay
One end of switch S1；One end connection charging negative pole end of the switch S1 of described second relay, described second
The other end of the switch S1 of relay connects the positive pole of described large-sized power lithium battery；Described second relay
One end of coil connects described battery management system, the other end ground connection of the coil of described first relay.
Further, described first temperature detection device is thermistor.
Further, described second temperature detection device is thermistor.
Large-sized power lithium battery charge and discharge protective device as above is used to protect dynamic lithium battery
Method, comprises the following steps:
Step 1: when current sensor I has detected charging current, and the second temperature detection device detected
Temperature when reaching the high temperature protection value of configuration, discharge prevention circuit and charge protection circuit be turned on, and makes big
Directly form path between the positive pole of type dynamic lithium battery and charging negative pole end；
Step 2: when directly forming path between the positive pole and charging negative pole end of large-sized power lithium battery, and inspection
When measuring the protection recovery value dropping to configure at a temperature of the second temperature detection device, disconnect described discharge prevention
Circuit, is charged to dynamic lithium battery；
Step 3: when current sensor I has detected discharge current, and the first temperature detection device detected
Temperature when reaching the high temperature protection value of configuration, discharge prevention circuit and charge protection circuit be turned on, and makes big
Directly form path between the positive pole of type dynamic lithium battery and charging negative pole end；
Step 4: when directly forming path between the positive pole and charging negative pole end of large-sized power lithium battery, and inspection
When measuring the protection recovery value dropping to configure at a temperature of the first temperature detection device, disconnect charge protection circuit,
Dynamic lithium battery is made to discharge.
Further, also include after described step 1:
Step 5: when detecting that charging current is converted to discharge current, opens in charge protection circuit second immediately
The switch S1 of relay, simultaneously the switch S2 Guan Bi of the first relay in discharge prevention circuit.
Further, also include after described step 3:
Step 6: when detecting that discharge current is converted to charging current, opens in discharge prevention circuit first immediately
The switch S2 of relay, the switch S1 Guan Bi of the device that simultaneously continues in charge protection circuit second.
Further, the discharge prevention circuit in described step 1 and described step 3 and charge protection circuit are equal
During connection, the switch S2 of the first relay and the switch S1 of the second relay is in closure state.
The present invention compared with prior art, has the beneficial effects that: use charge and discharge protecting device can avoid large-scale
Dynamic lithium battery produces substantial amounts of heat when charge or discharge, can reach a certain amount of at the heat producing simultaneously
When make electric current directly not exported by components and parts or input.
Brief description
Fig. 1 is the circuit structure of the embodiment offer of the charging and discharging protection device of large-sized power lithium battery of the present invention
Schematic diagram；
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.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and reality
Execute example, the present invention is further elaborated.Only it should be appreciated that specific embodiment described herein
It only in order to explain the present invention, is not intended to limit the present invention.
As it is shown in figure 1, be the present invention one preferred embodiment, the discharge and recharge of a kind of large-sized power lithium battery is protected
Protection unit, including large-sized power lithium battery 101 and battery management system 102, also includes the first temperature detector
Part, the second temperature detection device (not marking in the drawings), current sensor I106, discharge prevention line
Road 103 and charge protection circuit, described battery management system 102 all with current sensor I106, described put
Electric protection circuit 103 is connected with described charge protection circuit；Described current sensor I106, described electric discharge
Protection circuit 103 and described charge protection circuit are both connected to positive pole and the charging of described large-sized power lithium battery
Between negative pole end 1.Described first temperature detection device is connected with described battery management system 102, is used for
The temperature of discharge prevention circuit described in detection discharge process.Described battery management system 102 detects described
When the temperature of the first temperature detection device reaches the high temperature protection value of configuration, and flow through current sensor I106's
Electric current is discharge current, controls described discharge prevention circuit and described charge protection circuit is turned on, make large-scale
Directly form path between the positive pole of dynamic lithium battery and charging negative pole end.Described second temperature detection device with
Described battery management system 102 is connected, for detecting the temperature of charge protection circuit described in charging process.
Described battery management system detects that the temperature of described second temperature detection device reaches the high temperature protection value of configuration
When, and the electric current flowing through current sensor I106 is charging current, controls described discharge prevention circuit and described
Charge protection circuit is turned on, and makes directly to be formed between the positive pole of large-sized power lithium battery and charging negative pole end 1
Path.Described first temperature detection device and discharge prevention circuit compact siro spinning technology physically, but electric property
On be in state of insulation.Equally, described second temperature detection device is tight physically with charge protection circuit
Connect, but in electric property, be in state of insulation.Battery management system 102(Battery Management
System, BMS) it is mainly used in improving the utilization rate of battery, prevent battery from overcharge and overdischarge occurring
Phenomenon, extends the service life of battery, the state of monitoring battery.
Described discharge prevention circuit includes diode D1 and the first relay 105, the sun of described diode D1
Pole connects the positive pole of described large-sized power lithium battery 101, and the negative electrode of described diode D1 connects described first and continues
One end of the switch S2 of electrical equipment 105, the other end of described first relay 105 breaker in middle S2 connects charging
Negative pole end 1；The described battery management system of one end connection of the coil of described first relay 105, described first
The other end ground connection of the coil of relay.
Described charge protection circuit includes diode D2 and the second relay 104, the sun of described diode D2
Pole connects described charging negative pole end, and the negative electrode of described diode D2 connects the switch of described second relay 104
One end of S1；One end connection charging negative pole end 1 of the switch S1 of described second relay 104, described second
The other end of the switch S1 of relay 104 connects the positive pole of described large-sized power lithium battery 101；Described second
One end of the coil of relay 104 connects described battery management system 102, the line of described first relay 105
The other end ground connection of circle.
Described first temperature detection device and described second temperature detection device are respectively thermistor R1 and heat
Quick resistance R2, the two ends of thermistor R1 connect the two ends of described diode D1, thermistor R2 respectively
Two ends connect the two ends of described diode D2 respectively.
During charging, switch S1 Guan Bi, charging current flows through at diode D2, through the switch S1 of Guan Bi
Charge to large-scale lithium battery 101 with current sensor I106.When electric current flows through charge protection circuit, can produce
Heat, due to thermistor R2 physically with diode D2 compact siro spinning technology, but be exhausted in electric property
Edge, when charge protection circuit produces heat, thermistor R2 also can produce heat, when heat reaches certain
During value, i.e. reaching the high temperature protection value of configuration, thermistor R2 can control the second relay 105 makes switch
S2 closes, and now charging current is filled to large-scale lithium battery 101 directly through the switch S2 and switch S1 of Guan Bi
Electricity.When dropping to the protection recovery value of configuration at a temperature of thermistor R2 detects, control switch S2 disconnects.
When current sensor I106 detects that the sense of current is converted to electric discharge by charging, immediately switch S1 is opened,
Closing switch S2.
During electric discharge, switch S2 Guan Bi, discharge current flows through at current sensor I106 and diode D1,
Discharge to the equipment being connected with large-scale lithium battery 101 through the switch S2 of Guan Bi.Electric current flows through electric discharge to be protected
Heat can be produced when protecting circuit, due to thermistor R2 physically with diode D1 compact siro spinning technology, but
Being insulation in electric property, when discharge prevention circuit produces heat, thermistor R1 also can produce heat,
When heat reaches certain value, i.e. reaching the high temperature protection value of configuration, thermistor R1 can control the first relay
Device 104 makes switch S1 close, now discharge current directly through Guan Bi switch S1 and switch S2 to greatly
The equipment that type lithium battery 101 is connected discharges.Configuration is dropped at a temperature of thermistor R1 detects
During protection recovery value, control switch S1 disconnects.When current sensor I106 detects the sense of current by discharging
When being converted to charging, immediately switch S2 is opened, closing switch S1.
As in figure 2 it is shown, use above-mentioned large-sized power lithium battery charge and discharge protective device to enter dynamic lithium battery
The method of row protection, comprises the following steps: step 1: when current sensor I106 has detected charging current
When, and when high temperature protection value that the temperature of the second temperature detection device reaches configuration being detected, discharge prevention line
Road and charge protection circuit are turned on, and make direct shape between the positive pole of large-sized power lithium battery and charging negative pole end
Become path；Step 2: when directly forming path between the positive pole and charging negative pole end of large-sized power lithium battery,
And when the protection recovery value dropping to configuration at a temperature of the second temperature detection device being detected, disconnect described electric discharge
Protection circuit, is charged to dynamic lithium battery；Step 3: when current sensor I106 has detected electric discharge
During electric current, and when high temperature protection value that the temperature of the first temperature detection device reaches configuration being detected, electric discharge is protected
Protect circuit and charge protection circuit is turned on, make between the positive pole of large-sized power lithium battery and charging negative pole end straight
Connect formation path；Step 4: directly form path between the positive pole and charging negative pole end of large-sized power lithium battery
When, and when the protection recovery value dropping to configuration at a temperature of the first temperature detection device being detected, disconnect charging
Protection circuit, makes dynamic lithium battery discharge.
When discharge prevention circuit in described step 1 and described step 3 and charge protection circuit are turned on, the
The switch S1 of the switch S2 of one relay 105 and the second relay 104 is in closure state.
Also include after described step 1: step 5: when detecting that charging current is converted to discharge current, beat immediately
Open the switch S1 of the second relay 104 in charge protection circuit, first in discharge prevention circuit is continued simultaneously
The switch S2 Guan Bi of electrical equipment 105.
Also include after described step 3: step 6: when detecting that discharge current is converted to charging current, beat immediately
In open electric protection circuit, the switch S2 of the first relay 105, continues second in charge protection circuit simultaneously
The switch S1 Guan Bi of device 104.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Any modification, equivalent and the improvement etc. made within bright spirit and principle, should be included in the present invention
Protection domain within.
Claims (9)
1. a charging and discharging protection device for large-sized power lithium battery, including large-sized power lithium battery and cell tube
Reason system, it is characterised in that also include that the first temperature detection device, the second temperature detection device, electric current pass
Sensor I, discharge prevention circuit and charge protection circuit, described battery management system all with current sensor I,
Described discharge prevention circuit is connected with described charge protection circuit；Described current sensor I, described electric discharge are protected
Protect circuit and described charge protection circuit is both connected to positive pole and the charging negative pole end of described large-sized power lithium battery
Between；
Described first temperature detection device is connected with described battery management system, is used for detecting in discharge process
The temperature of described discharge prevention circuit；Described battery management system detects described first temperature detection device
When temperature reaches the high temperature protection value of configuration, and the electric current flowing through current sensor I is discharge current, controls institute
State discharge prevention circuit and described charge protection circuit is turned on, make positive pole and the charging of large-sized power lithium battery
Directly form path between negative pole end；
Described second temperature detection device is connected with described battery management system, is used for detecting in charging process
The temperature of described charge protection circuit；Described battery management system detects described second temperature detection device
When temperature reaches the high temperature protection value of configuration, and the electric current flowing through current sensor I is charging current, controls institute
State discharge prevention circuit and described charge protection circuit is turned on, make positive pole and the charging of large-sized power lithium battery
Directly form path between negative pole end.
2. charging and discharging protection device according to claim 1, it is characterised in that described discharge prevention line
Road includes diode D1 and the first relay, and the anode of described diode D1 connects described large-sized power lithium electricity
The positive pole in pond, the negative electrode of described diode D1 connects one end of the switch S2 of described first relay, described
The other end of the first relay breaker in middle S2 connects charging negative pole end；One end of the coil of described first relay
Connect described battery management system, the other end ground connection of the coil of described first relay.
3. charging and discharging protection device according to claim 1 and 2, it is characterised in that described charger
Protecting circuit and including diode D2 and the second relay, the anode of described diode D2 connects described charging negative pole
End, the negative electrode of described diode D2 connects one end of the switch S1 of described second relay；Described second continues
One end of the switch S1 of electrical equipment connects charging negative pole end, and the other end of the switch S1 of described second relay is even
Connect the positive pole of described large-sized power lithium battery；One end of the coil of described second relay connects described cell tube
Reason system, the other end ground connection of the coil of described first relay.
4. charging and discharging protection device according to claim 1, it is characterised in that described first temperature inspection
Surveying device is thermistor.
5. charging and discharging protection device according to claim 1, it is characterised in that described second temperature inspection
Surveying device is thermistor.
6. use the charging and discharging protection device of the arbitrary described large-sized power lithium battery of claim 1 to 5 to dynamic
The method that power lithium battery is protected, it is characterised in that comprise the following steps:
Step 1: when current sensor I has detected charging current, and the second temperature detection device detected
Temperature when reaching the high temperature protection value of configuration, discharge prevention circuit and charge protection circuit be turned on, and makes big
Directly form path between the positive pole of type dynamic lithium battery and charging negative pole end；
Step 2: when directly forming path between the positive pole and charging negative pole end of large-sized power lithium battery, and inspection
When measuring the protection recovery value dropping to configure at a temperature of the second temperature detection device, disconnect described discharge prevention
Circuit, is charged to dynamic lithium battery；
Step 3: when current sensor I has detected discharge current, and the first temperature detection device detected
Temperature when reaching the high temperature protection value of configuration, discharge prevention circuit and charge protection circuit be turned on, and makes big
Directly form path between the positive pole of type dynamic lithium battery and charging negative pole end；
Step 4: when directly forming path between the positive pole and charging negative pole end of large-sized power lithium battery, and inspection
When measuring the protection recovery value dropping to configure at a temperature of the first temperature detection device, disconnect charge protection circuit,
Dynamic lithium battery is made to discharge.
7. method according to claim 6, it is characterised in that also include after described step 1:
Step 5: when detecting that charging current is converted to discharge current, opens in charge protection circuit second immediately
The switch S1 of relay, simultaneously the switch S2 Guan Bi of the first relay in discharge prevention circuit.
8. method according to claim 6, it is characterised in that also include after described step 3:
Step 6: when detecting that discharge current is converted to charging current, opens in discharge prevention circuit first immediately
The switch S2 of relay, the switch S1 Guan Bi of the device that simultaneously continues in charge protection circuit second.
9. method according to claim 6, it is characterised in that in described step 1 and described step 3
Discharge prevention circuit and charge protection circuit when being turned on, the switch S2 of the first relay and the second relay
Switch S1 be in closure state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Publication Number | Publication Date |
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| CN103825254A CN103825254A (en) | 2014-05-28 |
| CN103825254B true CN103825254B (en) | 2016-10-05 |
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| CN201410049345.6A Expired - Fee Related 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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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106935921B (en) * | 2017-02-08 | 2023-09-15 | 东莞市云帆电子科技有限公司 | Method for charging and discharging conventional battery in low-temperature environment |
| CN110957703B (en) * | 2018-09-26 | 2023-05-05 | 株式会社斯巴鲁 | Main relay protection device |
| JP6671440B1 (en) * | 2018-09-28 | 2020-03-25 | 株式会社Ｓｕｂａｒｕ | 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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| EP2092627A1 (en) * | 2006-11-10 | 2009-08-26 | Lithium Balance A/S | A battery management system |
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| CN102027655A (en) * | 2008-03-31 | 2011-04-20 | A123***公司 | Method for detecting cell state-of-charge and state-of-discharge divergence of a series string of batteries or capacitors |
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|---|---|---|---|---|
| EP2092627A1 (en) * | 2006-11-10 | 2009-08-26 | Lithium Balance A/S | A battery management system |
| CN101636892A (en) * | 2006-11-10 | 2010-01-27 | 锂平衡公司 | Battery management system |
| CN102097844A (en) * | 2011-01-17 | 2011-06-15 | 余维 | Intelligent battery management system |
| CN202651843U (en) * | 2012-06-15 | 2013-01-02 | 凹凸电子（武汉）有限公司 | Battery monitoring device, battery system and electric equipment |
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