CN201000909Y - Secondary battery having temperature protective equipment - Google Patents
Secondary battery having temperature protective equipment Download PDFInfo
- Publication number
- CN201000909Y CN201000909Y CNU2007201184084U CN200720118408U CN201000909Y CN 201000909 Y CN201000909 Y CN 201000909Y CN U2007201184084 U CNU2007201184084 U CN U2007201184084U CN 200720118408 U CN200720118408 U CN 200720118408U CN 201000909 Y CN201000909 Y CN 201000909Y
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- temperature
- switch
- battery pack
- battery
- voltage
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- 230000001681 protective effect Effects 0.000 title claims description 19
- 230000005611 electricity Effects 0.000 claims description 28
- 230000008859 change Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 2
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 238000007599 discharging Methods 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000003679 aging effect Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The electric core is damaged by charging and releasing to a lithium ion battery under the circumstance of overheated. The utility model provides a secondary battery with a temperature protection device, which comprises a battery casing (1), a battery group (2), a charging circuit, a releasing circuit and a security protection device (3). The battery group (2) is arranged in the battery casing (1), and formed by a plurality of series-wounded battery unit (21), and the charging circuit, the releasing circuit and the security protection device (3) are connected with the battery group (2), the security protection device (3) comprises the temperature protection device which can provide multi-stage protection when the temperature of the battery group (2) is unusual, and is connected with a charging circuit and a releasing circuit of the battery group (2). Comparing with the existing art, the utility model adopts multiple temperature protection, the reliability is higher, meanwhile, the circuit is relatively simple, and the cost is lower.
Description
Technical field
The utility model relates to a kind of secondary cell, relates in particular to a kind of secondary cell with temperature protective device.
Background technology
Under overheated situation, lithium ion battery discharged and recharged and to damage electric core, if and rechargeable battery temperature in charging process significantly raises, the internal resistance of battery will reduce, and then make charging current increase, so further will cause the decline of the internal resistance of cell, this cumulative effect will cause " thermal runaway " very soon, finally can damage battery, and may cause surrounding enviroment, equipment and personnel's loss.Present known electric core temperature protective device only adopts negative temperature coefficient resister and temperature switch to form.The reliability of this mode is generally not high, when electric core charging and discharging circuit breaks down, tends to allow this circuit malfunctioning, and electric core damages owing to temperature is too high.
For example 95107056.8 of Chinese patent application CN are called " according to the apparatus and method of battery temperature control battery charging voltage " and disclose a kind of batter-charghing system, according to the different range control of battery temperature with regulate the output voltage of charging rectifier.In low temperature range, rectifier voltage raises with temperature and reduces charging current increase when preventing that battery temperature from raising.This has reduced the aging effect of battery high-temperature work.Keep the stereotype corrosion of a steady state value to prevent to quicken in the battery in ensuing temperature range, this corrosion takes place during the open circuit voltage level after voltage charges fully near battery usually.When reaching the second temperature range temperature end, charging voltage drops to battery with step function and charges fully below the open circuit voltage of back to stop the thermal runaway situation.And produce an alarm signal.
But also there is following defective in this method and apparatus: this scheme is only protected the charging process of battery, the discharge process of battery is not protected; The peripheral circuit more complicated that this scheme adopts, cost is higher, and reliability is lower.
The utility model content
The technical problems to be solved in the utility model is when the secondary cell working temperature is higher, to cut off the operating circuit of battery, the safety of assurance battery.
In order to realize above technical purpose; the utility model provides a kind of secondary cell; comprise: battery case, be arranged on battery pack and the charge circuit that is connected with this battery pack, discharge loop and safety guard that the battery unit that is connected in series mutually by more piece in the battery case is formed; it is characterized in that: the temperature protective device of two-stage protection appears can providing unusual the time in the temperature that described safety guard is included in described battery pack, is connected in described batteries charging loop and the discharge loop.
Described charge circuit comprises with lower part series connection formation: charging port, controlled fuse, battery pack, Thermal Cutoffs and charge switch;
Described discharge loop comprises with lower part series connection formation: discharge output port, switch lock, electric current fuse, battery pack, Thermal Cutoffs, resistance and discharge switch;
Serial connection charge switch in the described batteries charging loop, discharged in series switch in the described battery power discharge loop;
Described charge switch is a gate-controlled switch, adopts metal-oxide-semiconductor IRF5305;
Described discharge switch is a gate-controlled switch, adopts metal-oxide-semiconductor IRF3205.
The utility model is by following technological means, can cut off charge circuit in the temperature of described battery pack being higher than 70 degrees centigrade or when being lower than 0 degree centigrade, stops charging, when temperature returns to 0 to 50 degree centigrade, recovers charging.When this technological means lost efficacy, when temperature is higher than certain value, cut off the charging and discharging circuit of described battery pack simultaneously.
When above technological means all lost efficacy, the temperature of battery pack further raise, and can also cut off the charging and the discharge loop of battery pack by the fusing of Thermal Cutoffs.
Described temperature protective device comprises device for detecting temperature and Thermal Cutoffs, and described temperature-detecting device is connected with temperature switch with the negative temperature coefficient resister that is placed on described battery pack the inside, and controls described charge switch and discharge switch.
Comprise the computing amplifying unit in the described device for detecting temperature, this computing amplifying unit input is imported the signal of described negative temperature coefficient resister change in resistance, the output control charge switch of this computing amplifying unit.
The temperature T of described negative temperature coefficient resister is lower than Y degree centigrade or when being higher than X degree centigrade, described operational amplifier cuts off described charge switch.
Described X is 50, and described Y is 0.
Described computing amplifying unit comprises first operational amplifier and second operational amplifier, and described first operational amplifier and second operational amplifier adopt LM358.
Described temperature switch is a temperature memory alloy switch, when the temperature of described battery pack surpasses certain value A, the action of described temperature switch, the actuating signal of described temperature switch is delivered to described device for detecting temperature, in order to control described charge switch and discharge switch;
Described A value equals 70 degrees centigrade.
Described Thermal Cutoffs is connected in described charge circuit and the discharge loop, arrives when being higher than a specific described A value temperature to fuse, and this fusing is expendable.So further guaranteed safety.
In order to guarantee the trouble free service of described secondary cell, described safety guard also comprises:
The battery cell voltage bascule is used for regulating described battery cell voltage and the voltage of described each battery unit of battery pack is close;
Adopt the electric current and voltage supervising device of more piece electricity core protection chip, the input of described more piece electricity core protection chip connects the both positive and negative polarity of every batteries unit in the described battery pack and the two ends that series connection inserts the resistance of described discharge loop, the output control discharge switch of described more piece electricity core protection chip, output control charge switch;
Adopt the secondary voltage protective device of more piece electricity core protection chip; the input of described integrated more piece electricity core protection chip connects every batteries unit in the battery pack; described integrated more piece electricity core protection chip output is controlled controlled fuse, and described more piece electricity core protection chip adopts S8244.
Compare with prior art, the utility model has adopted multiple temperature protection, and reliability is higher, and circuit is also relatively simple simultaneously, and cost is lower.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is an electrical block diagram of the present utility model;
Fig. 3 is the operating circuit schematic diagram of battery cell voltage bascule of the present utility model;
Fig. 4 is the operating circuit schematic diagram of temperature protective device of the present utility model;
Fig. 5 is the operating circuit schematic diagram of electric current and voltage supervising device of the present utility model;
Fig. 6 is the operating circuit schematic diagram of secondary voltage protective device of the present utility model;
Fig. 7 is the circuit diagram of device for monitoring temperature of the present utility model.
Embodiment
A kind of as shown in Figure 1 secondary cell comprises: battery case 1, battery pack 2 and the safety guard 3 that is connected with described battery pack 2 by connection line 8.Described battery pack 2 is connected in series by multiple batteries unit 21 and forms.By described safety guard 3, can ensure that described battery pack 2 electric current, voltage and temperature in charge and discharge process are controlled in the certain limit, and can guarantee that the voltage between the battery unit in the described battery pack 2 is in more than the identical level.
This secondary cell also comprises: dump energy indicating circuit 17, discharge output port 18, charging input end mouth 19 and switch lock 16.Can indicate the electric weight of described battery pack by described dump energy knowledge circuit 17.Described switch lock 16 is connected in the discharge loop of described battery pack 2, can disconnect or connect described charging and discharging circuit by described switch lock 16.
Secondary cell circuit as shown in Figure 2.Battery pack 2 has two loops: by the discharge loop of discharge port 18 and the charge circuit by charging port 19.Charge circuit comprises with lower part series connection formation: charging port 19, controlled fuse 14, battery pack 2, Thermal Cutoffs 78, first charge switch 91 and second charge switch 92.Discharge loop comprises with lower part series connection formation: discharge output port 18, switch lock 16, electric current fuse 15, battery pack 2, Thermal Cutoffs 78, resistance 13 and discharge switch 10.
Excessive when the discharging current of described discharge loop, when surpassing the fusing value of described electric current fuse 15, described electric current fuse 15 fuses, and described discharge loop opens circuit.
Described first charge switch 91 and second charge switch 92 and discharge switch 10 are gate-controlled switch, and its state is normally closed, and when control end was sent into signal, then switch disconnected.
Described controlled fuse 14 states are normally closed, fusing immediately after its control end is received the fusing signal, and this fusing is irrecoverable.
The safety guard 3 that is connected with described battery pack 2 by connection line comprises battery cell voltage bascule 4, electric current and voltage supervising device 5, secondary voltage protective device 6 and temperature protective device.
Described battery cell voltage bascule 4 is connected with described battery pack 2 and wherein every batteries unit item by circuit.
Described temperature protective device comprises device for monitoring temperature 7 and Thermal Cutoffs 78, and the output of device for detecting temperature 7 connects the control end of first charge switch 91 and second charge switch 92 and the control end of discharge switch 10 respectively.
The resistance 13 of connecting in the electric core of the input of described electric current and voltage supervising device 5 and battery pack 2 and the discharge loop of described battery pack 2 is connected, and output connects the control end of second charge switch 92 and the control end of discharge switch 10 by lead.By monitoring the voltage on the described resistance 13, the linear electric current that is proportional to discharge loop of this voltage.Described electric current and voltage supervising device 5 can obtain the discharging current of described discharge loop.Described electric current and voltage supervising device 5 can be sent control signal to the control end of described second charge switch 92 or the control end of discharge switch 10, cuts off described charge circuit or discharge loop.
The input of secondary voltage protective device 6 links to each other with described battery pack 2 the two poles of the earth, monitors the voltage of described battery pack 2, and output links to each other with the control end of described controlled fuse 14 by guiding.
As shown in Figure 4, a kind of temperature protective device is connected in battery pack 2 charge circuits and the discharge loop, comprises device for detecting temperature 7 and Thermal Cutoffs 78.
Described device for detecting temperature 7 is connected with temperature switch 71 with negative temperature coefficient resister 72 in the gap that is placed on described battery pack 2, and controls described first charge switch 91 and second charge switch 92 and discharge switch 10.
The signal of described negative temperature coefficient resister 72 change in resistance is imported operational amplifier in the described device for detecting temperature 7 by lead, and the output of this operational amplifier connects first charge switch 91 and second charge switch, 92 control ends by lead.Described operational amplifier adopts LM358.
Described first charge switch 91 and second charge switch 92 adopt metal-oxide-semiconductor IRF5305, and described discharge switch 10 adopts metal-oxide-semiconductor IRF3205.
When the temperature of described negative temperature coefficient resister 72 is lower than 0 degree centigrade or when being higher than 70 degrees centigrade, described operational amplifier is sent level signal and cut off described first charge switch 91, stops the charging of described battery pack 2.
Described temperature switch 71 is a temperature memory alloy switch, and the actuating signal of described temperature switch 71 is sent into described device for detecting temperature 7.When the temperature of described battery pack 2 surpasses certain value A, the action of described temperature switch 71, this actuating signal is by described device for detecting temperature 7 described charge switch 92 of control and discharge switches 10.After the temperature in the described battery pack 2 returned to certain limit, described charge switch 92 and discharge switch 10 recovered closed.Described A value is 70 degrees centigrade.
When the temperature of described battery pack 2 rises when reaching a certain temperature value B then described Thermal Cutoffs 78 fusing, the charge circuit and the discharge loop that cut off described battery pack 2.Described B value is higher than described A value.
The fusing of described Thermal Cutoffs 78 is expendable.
As shown in Figure 7, the voltage of negative temperature coefficient resister 72 will change with variation of temperature, use bridge circuit as figure can detect as described in the change in voltage of negative temperature coefficient resister 72 just can detect the variation of temperature amount.The voltage of negative temperature coefficient resister 72 connects the negative input of operational amplifier 76 and the positive input of operational amplifier 77.The voltage of resistance 74 is imported the positive input of first operational amplifier 76, and the voltage of resistance 75 is imported the negative input of second operational amplifier 77, and the voltage with temperature coefficient of resistance 72 compares respectively.The output of first operational amplifier, 76 outputs and second operational amplifier 77 is by the closed and disconnected of voltage transitions 79 controls first charge switch 91.
Described voltage transitions 79 can be according to the difference of the voltage of importing, output height or low level, and in the present embodiment, high level turn off charge switch (91), low level make charge switch (91) closure.
Described negative temperature coefficient resister 72 is in 0 to 50 degree centigrade of scope the time, and voltage is higher than institute's component voltage on the described resistance 75 on the described negative temperature coefficient resister 72, also is lower than institute's component voltage on the described resistance 74.At this moment, 77 outputs of described operational amplifier 76 and operational amplifier are sent to the control end of described charge switch 91 by this level signal by described voltage transitions 79, and charge circuit is communicated with.
When the temperature of described negative temperature coefficient resister 72 is lower than certain certain value, voltage on the described negative temperature coefficient resister 72 is higher than voltage on the described resistance 74, described operational amplifier 76 output low level signals, then described voltage transitions 79 output high level, cut off described charge switch 91, the charge circuit open circuit.When the temperature of described temperature coefficient of resistance 72 surpasses certain certain value, voltage on the described negative temperature coefficient resister 72 is lower than voltage on the described resistance 75, described operational amplifier 77 output low level signals, this level signal is cut off described charge switch 91 by described voltage transitions 79, the charge circuit open circuit.
As shown in Figure 3, described battery pack 2 is connected in series by several battery units 21 and forms.Described battery unit 21 and described battery cell voltage bascule 4 are connected in parallel.Described battery unit 21 and resistance 44 and gate-controlled switch 43 are connected in series and are the loop, and the control end of described gate-controlled switch 43 is connected with the output of comparator 42.The end of just comparing of described comparator 42 links to each other with the positive pole of described battery unit 21, is the voltage of described battery unit 21; The negative sense of described comparator is relatively held with the average voltage level of all battery units of described battery pack 2 and is connected.
Described gate-controlled switch 43 is open circuit when being low level at its control end.When the voltage of described battery unit 21 is higher than the average voltage of all battery units of battery pack 2, the output of described comparator 42 sends high level for the control of gate-controlled switch 43, described gate-controlled switch 43 is connected, then described battery unit 21 discharges by described resistance 44, equals up to battery unit 21 voltages till the average voltage level of all battery units of described battery pack 2.
Described gate-controlled switch 43 can adopt metal-oxide-semiconductor, and described gate-controlled switch 43 control ends are the G utmost point of this metal-oxide-semiconductor.Described comparator 42 can adopt operational amplifier integrated circuit LM324.
The average voltage level of all battery units of described battery pack 2 can obtain in the following manner: described battery pack 2 is connected in series by N batteries unit 21, then can be identical with N resistance and be connected to independent loop greater than the resistance series connection of 100M ohm in described battery pack 2, then can on this single resistance, obtain the average voltage level of all battery units of described battery pack 2.
As shown in Figure 5, described electric current and voltage supervising device 5 adopts more piece electricity core protection chip 12.
The both positive and negative polarity of every batteries unit all is connected respectively to the input of described more piece electricity core protection chip 12 in the described battery pack 2 by lead; the series connection of battery pack 2 discharge loops inserts resistance 13; described resistance 13 two ends are wired to the input of more piece electricity core protection chip 12, in order to detect battery pack 2 discharge loop electric currents.
The output 122 control discharge switches 10 of more piece electricity core protection chip 12, output 121 controls second charge switch 92 of described more piece electricity core protection chip 12.
Any batteries cell voltage is lower than certain limit in the described battery pack 2 when described more piece electricity core protection chip 12 detects, and then this chip output 122 is sent level signal, cuts off described discharge switch 10, thereby cuts off discharge loop.
Any batteries cell voltage surpasses certain limit in the described battery pack 2 when described more piece electricity core protection chip 12 detects, and then this chip output 121 is sent level signal, cuts off described first charge switch 91, thereby cuts off charge circuit.
Described integrated more piece electricity core protection chip 12 adopts S8254.
As shown in Figure 6, described secondary voltage protective device 6 adopts more piece electricity core protection chip 20.Described charging port 19 and 14 series connection of controlled fuse connect battery pack 2, and the input of integrated more piece electricity core protection chip 20 is used to detect the voltage of every batteries unit by every batteries unit in the wire connected battery group 2.Described more piece electricity core protection chip 20 adopts S8244.
The voltage that detects any batteries unit in the described battery pack 2 when described more piece electricity core protection chip 20 surpasses certain numerical value; be that electric current and voltage supervising device 5 lost efficacy; in the time of the overtension of battery unit; described integrated more piece electricity core protection chip 20 outputs send the fusing signal for controlled fuse 14 by lead, then controlled fuse 14 fusing.14 fusing of electric current fuse are irrecoverable.
Claims (10)
1, a kind of secondary cell with temperature protective device; comprise: battery case (1), be arranged on battery pack (2) that the battery unit (21) that is connected in series mutually by more piece in the battery case (1) formed and charge circuit, discharge loop and the safety guard (3) that is connected with this battery pack (2), it is characterized in that:
The temperature protective device of multi-stage protection appears can providing unusual the time in the temperature that described safety guard (3) is included in described battery pack (2), is connected in described battery pack (2) charge circuit and the discharge loop.
2, secondary cell according to claim 1; it is characterized in that; described temperature protective device; comprise device for detecting temperature (7) and Thermal Cutoffs (78); described temperature-detecting device (7) is connected with temperature switch (71) with the negative temperature coefficient resister (72) that is placed on described battery pack (2) the inside, and controls described first charge switch (91) and second charge switch (92) and discharge switch (10).
3, secondary cell according to claim 2, it is characterized in that, described device for detecting temperature comprises the computing amplifying unit in (7), and this computing amplifying unit input is imported the signal of described negative temperature coefficient resister (72) change in resistance, the output control charge switch of this computing amplifying unit.
4, secondary cell according to claim 3 is characterized in that, the temperature T of described negative temperature coefficient resister (72) is lower than Y degree centigrade or when being higher than X degree centigrade, described operational amplifier cuts off described charge switch.
5, secondary cell according to claim 4 is characterized in that, described X is 50, and described Y is 0.
6, secondary cell according to claim 3 is characterized in that, described computing amplifying unit comprises first operational amplifier (76) and second operational amplifier (77), and described first operational amplifier (76) and second operational amplifier (77) adopt LM358.
7, secondary cell according to claim 2, it is characterized in that, described temperature switch (71) is a temperature memory alloy switch, when the temperature of described battery pack (2) surpasses certain value A, the action of described temperature switch (71), the actuating signal of described temperature switch (71) is delivered to described device for detecting temperature (7), in order to control described first charge switch (91) and second charge switch (92) and discharge switch (10).
8, secondary cell according to claim 7 is characterized in that, described A value equals 70 degrees centigrade.
9, secondary cell according to claim 2 is characterized in that, described Thermal Cutoffs (78) is connected in described charge circuit and the discharge loop, arrives when being higher than a specific described A value temperature to fuse, and this fusing is expendable.
10, secondary cell according to claim 1 is characterized in that, described safety guard (3) also comprises:
Be used to regulate described battery unit (21) voltage, and the battery cell voltage bascule (4) that the voltage of each battery unit (21) in the described battery pack (2) is close;
Adopt the electric current and voltage supervising device (5) of integrated more piece electricity core protection chip (12), the input of described integrated more piece electricity core protection chip (12) connects the both positive and negative polarity of every batteries unit in the described battery pack (2) and the two ends that series connection inserts the resistance (13) of described discharge loop, output (122) the control discharge switch (10) of described integrated more piece electricity core protection chip (12), output (121) control first charge switch (91);
Adopt the secondary voltage protective device (6) of integrated more piece electricity core protection chip (20); the input of described integrated more piece electricity core protection chip (20) connects every batteries unit in the battery pack (2); described integrated more piece electricity core protection chip (20) output is controlled controlled fuse (14), and described integrated more piece electricity core protection chip (20) adopts S8244.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201184084U CN201000909Y (en) | 2007-01-30 | 2007-01-30 | Secondary battery having temperature protective equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201184084U CN201000909Y (en) | 2007-01-30 | 2007-01-30 | Secondary battery having temperature protective equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201000909Y true CN201000909Y (en) | 2008-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201184084U Expired - Lifetime CN201000909Y (en) | 2007-01-30 | 2007-01-30 | Secondary battery having temperature protective equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201000909Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600371A (en) * | 2015-02-04 | 2015-05-06 | 东莞新能德科技有限公司 | Safe polymer lithium ion battery pack structure and assembly process thereof |
| CN110525219A (en) * | 2019-09-04 | 2019-12-03 | 江铃汽车股份有限公司 | A kind of detection of power battery pack thermal runaway and protective device and its method of electric car |
-
2007
- 2007-01-30 CN CNU2007201184084U patent/CN201000909Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600371A (en) * | 2015-02-04 | 2015-05-06 | 东莞新能德科技有限公司 | Safe polymer lithium ion battery pack structure and assembly process thereof |
| CN110525219A (en) * | 2019-09-04 | 2019-12-03 | 江铃汽车股份有限公司 | A kind of detection of power battery pack thermal runaway and protective device and its method of electric car |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080102 |