CN210074096U - Power battery thermal runaway automatic protection device - Google Patents
Power battery thermal runaway automatic protection device Download PDFInfo
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- CN210074096U CN210074096U CN201921138613.6U CN201921138613U CN210074096U CN 210074096 U CN210074096 U CN 210074096U CN 201921138613 U CN201921138613 U CN 201921138613U CN 210074096 U CN210074096 U CN 210074096U
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- power battery
- thermal runaway
- pipeline
- injection valve
- protection device
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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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Abstract
The utility model relates to the technical field of electric automobiles, and discloses a power battery thermal runaway automatic protection device, which comprises a liquid storage device, a circulating pump, a circulating pipeline and an injection valve; circulation pipeline lays in the box of encapsulation power battery package, the stock solution device intussuseption is filled with insulating cooling medium, the stock solution device passes through the circulating pump with circulation pipeline intercommunication, install a plurality of injection valves on the circulation pipeline, the injection valve orientation the battery module setting of power battery package, each the injection valve all with the BMS battery manager electricity of power battery package is connected. The utility model discloses a power battery thermal runaway automatic safety device need not to increase extra temperature-detecting device, can realize the control of power battery package thermal runaway accident and handle, guarantees the fail safe nature of power battery package, and the weight is light moreover, and the facilitate promotion is used.
Description
Technical Field
The utility model relates to a power battery technical field, concretely relates to power battery thermal runaway automatic safety device.
Background
The thermal runaway of the power battery refers to the phenomena of overheating, fire and explosion of the battery caused by the rapid change of the temperature rise rate of the single storage battery due to the exothermic chain reaction. With the popularization and application of electric automobiles, safety accidents caused by thermal runaway occur occasionally, property loss of consumers is caused, and the confidence of the consumers on the electric automobiles is struck. In order to prevent thermal runaway, the power battery system for the vehicle needs to be designed correspondingly and safely.
Phase Change Materials (PCMs) are substances that retain a constant or small range of temperature change during a phase change process, but absorb or release a large amount of latent heat. Currently, PCM has been widely used in many fields. For example, a battery cell or a battery module may be directly immersed in a PCM to thermally manage the battery by absorbing and discharging heat when the PCM is melted or solidified. However, the design scheme makes the PCM have a large mass specific gravity in the battery pack, and is not popularized in the market of power batteries.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned technique not enough, provide a power battery thermal runaway automatic safety device, solve among the prior art can't carry out the technical problem of effectively taking precautions against to battery thermal runaway.
In order to achieve the technical purpose, the technical scheme of the utility model provides an automatic thermal runaway protection device for a power battery, which comprises a liquid storage device, a circulating pump, a circulating pipeline and an injection valve;
the circulation pipeline is laid in the box of encapsulation power battery package, the stock solution device intussuseption is filled with phase change material, the stock solution device pass through the circulating pump with circulation pipeline intercommunication, install a plurality ofly on the circulation pipeline the injection valve, the injection valve orientation the battery module of power battery package sets up, each the injection valve all with the BMS battery manager electricity of power battery package is connected.
Compared with the prior art, the beneficial effects of the utility model include: the utility model discloses a stock solution device, circulating pump and circulation line constitute insulating cooling medium's circulation system, at the circulation lid as above installation injection valve, when BMS battery manager detected battery module to take place thermal runaway, control corresponding injection valve and open, insulating cooling medium spouts thermal runaway's battery module, cools down and cools off and put out a fire. The utility model discloses utilize BMS battery manager of electric automobile self to realize the detection of thermal runaway, need not to increase extra temperature-detecting device, the switch of BMS battery manager control injection valve, thereby when battery module takes place the thermal runaway, timely blowout insulating cooling medium handles, guarantee the fail safe nature of power battery package, avoid the emergence of thermal runaway accident, realize insulating cooling medium to the cover of whole power battery package through circulation pipeline simultaneously, when realizing the comprehensive control of power battery package thermal runaway, the weight of insulating cooling medium has been reduced, the whole weight of power battery package has been reduced, and the convenient for popularize and apply.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of an automatic thermal runaway protection device for a power battery.
Reference numerals:
1. liquid storage device, 2, circulating pump, 3, circulation pipeline, 4, injection valve, 5, circulation solenoid valve, 10, box, 20, battery module, 30, BMS battery manager.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1, embodiment 1 of the present invention provides an automatic thermal runaway protection device for a power battery, which includes a liquid storage device 1, a circulation pump 2, a circulation pipeline 3 and an injection valve 4;
The embodiment of the utility model provides a through stock solution device 1, circulating pump 2, circulation pipeline 3 constitutes insulating coolant's circulation system, insulating coolant link up in circulation pipeline 3, flow via circulation pipeline 3 circulation under circulating pump 2 control, at power battery package normal use, when not taking place thermal runaway, insulating coolant's circulation system is used for wrapping the cooling for power battery, when power battery package thermal runaway, the nearest injection valve 4 of distance thermal runaway battery module 20 is opened, insulating coolant spouts from circulation pipeline 3, cool down to taking place thermal runaway's battery module 20 rapidly and put out a fire, the very first time eliminates the potential safety hazard to thermal runaway, electric automobile's security and reliability have been guaranteed. Therefore, the utility model discloses integrated cool off and put out a fire the function of power battery package, prevent the conflagration that the thermal runaway caused when realizing power battery package thermal management function.
The judgement of thermal runaway is realized by BMS battery manager 30, because electric automobile self has the BMS system, consequently the utility model provides a power battery thermal runaway automatic protection device need not other structures or components such as special temperature sensor for the control and carries out the detection of temperature to effective reduce cost under the prerequisite that improves power battery package reliability. Present BMS battery manager all has thermal runaway's judgement function, and thermal runaway's judgement logic adopt prior art to realize can, the utility model discloses do not relate to the improvement to this, consequently do not give unnecessary details here.
The utility model provides a power battery thermal runaway automatic protection device carries out the direct cooling of insulating cooling medium injection or puts out a fire to the thermal runaway, has optimized electric automobile power battery thermal management system function, and further prevention removes electric automobile system potential safety hazard side by side, has improved the security and the reliability of electric automobile system, and the effective prevention power battery package is favorable to electric automobile's further popularization and application because of accidents such as conflagration that the thermal runaway causes.
Preferably, the insulating cooling medium is a phase change material.
The phase-change material has the characteristics of insulation, high latent heat absorption during phase change and high fluidity, so that the phase-change material is very suitable to be selected as a cooling and fire-extinguishing material for the power battery pack. For example, in the preferred embodiment, the carbon dioxide refrigerant is used as the insulating cooling medium, and the liquid carbon dioxide immediately vaporizes to absorb heat under normal pressure, so that the temperature of the environment is rapidly reduced, and a good temperature-reducing and fire-extinguishing effect can be achieved; in addition, carbon dioxide itself cannot be combusted or does not support combustion, and has a density higher than that of air, so that the oxygen concentration around combustible materials can be reduced, and a suffocation effect is generated to extinguish fire.
Preferably, the circulation pipeline 3 adopts an air conditioner pipeline of an electric automobile, and the liquid storage device 1 is further provided with a heater and a radiator.
In the preferred embodiment, the circulation pipeline 3 and an air conditioning pipeline of the electric automobile are combined into a whole, and the thermal runaway management is realized while the temperature control is realized through an air conditioning system. Specifically, a circulating medium in the air conditioning system is replaced by an insulating cooling medium, preferably a phase-change material, the air conditioning system and the power battery thermal runaway automatic protection device are integrally designed, an air conditioning pipeline is connected with the circulating pipeline 3 in parallel, and heating and refrigeration of the insulating cooling medium are realized through a radiator and a heater so as to adapt to different temperature requirements. When the thermal runaway of the battery module 20 of the power battery pack is detected and confirmed by the BMS battery manager 30, the injection valve 4 closest to the battery module 20 on the circulating pipeline 3 is opened, and the insulating cooling medium is sprayed out to cool and extinguish the fire of the thermal runaway area.
Preferably, the air conditioning pipeline is a liquid cooling plate installed in the power battery pack.
The liquid cooling plate is a common air conditioning pipeline, and the preferred embodiment adopts the liquid cooling plate as the air conditioning pipeline and simultaneously as the circulating pipeline 3.
Preferably, the circulation pipeline 3 is connected with an air conditioning pipeline of the electric automobile through a heat exchanger.
In the preferred embodiment, the air conditioning pipeline and the circulation pipeline 3 of the electric vehicle are separately arranged, and the air conditioning pipeline is coupled with the circulation pipeline 3 through the heat exchanger. Because the air-conditioning pipeline is separately arranged, when the thermal runaway of the power battery pack is not detected, the circulating pipeline 3 is in a closed state, and when the thermal runaway of the power battery pack is detected and confirmed by the BMS battery manager 30, the corresponding injection valve 4 is opened to realize the injection cooling of the insulating cooling medium.
Preferably, as shown in fig. 1, the number of the injection valves 4 is equal to and corresponds to the number of the battery modules 20, and each injection valve 4 is disposed toward the corresponding battery module 20.
Each battery module 20 is provided with a corresponding injection valve 4, so that accurate injection covering fire extinguishing in thermal runaway is realized. Preferably, can also keep apart the setting with a plurality of battery module of power battery package, set up corresponding circulating line 3 for each battery module, set up corresponding injection valve 4 for a plurality of battery monomers in the battery module, the quantity of injection valve 4 equals and the one-to-one with the free quantity of battery, when battery monomer thermal runaway detected by BMS battery manager 30, insulating cooling medium is from corresponding injection valve 4 blowout, cool down or put out a fire to thermal runaway's battery monomer rapidly, thereby realize more accurate thermal runaway and handle.
Preferably, as shown in fig. 1, a circulation solenoid valve 5 is further installed on the circulation line 3.
And a circulating electromagnetic valve 5 is arranged on the circulating pipeline 3 to control the circulating process.
Preferably, as shown in fig. 1, a plurality of the battery modules 20 are arranged in a matrix in the case 10, and the circulation line 3 is laid in a serpentine line.
The circulating pipeline 3 is laid in a serpentine shape around the battery modules, so that the circulating pipeline 3 is laid between every two adjacent rows of the battery modules. Two sets of injection valves 4 of installation on the circulation pipeline 3 between two adjacent rows of battery modules, a set of injection valve 4 sets up towards one of them row of battery module, another group injection valve 4 sets up towards another row of battery module, satisfying under the prerequisite that each battery module all has the injection valve 4 that corresponds like this, reduce circulation pipeline 3's occupation space and length as far as, alleviate insulating cooling medium's weight, make the whole lighter-weight more of power battery package, and the miniaturization does benefit to the popularization and application of power battery package.
The above description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.
Claims (7)
1. An automatic thermal runaway protection device for a power battery is characterized by comprising a liquid storage device, a circulating pump, a circulating pipeline and an injection valve;
circulation pipeline lays in the box of encapsulation power battery package, the stock solution device intussuseption is filled with insulating cooling medium, the stock solution device passes through the circulating pump with circulation pipeline intercommunication, install a plurality ofly on the circulation pipeline the injection valve, the injection valve orientation the battery module of power battery package sets up, each the injection valve all with the BMS battery manager electricity of power battery package is connected.
2. The automatic thermal runaway protection device for power batteries according to claim 1, wherein the circulation pipeline is an air conditioning pipeline of an electric vehicle, and the liquid storage device is further provided with a heater and a radiator.
3. The automatic thermal runaway protection device for power battery as claimed in claim 2, wherein the air conditioning pipeline is a liquid cooling plate installed in the power battery pack.
4. The power battery thermal runaway automatic protection device of claim 1, wherein the circulation pipeline is connected with an air conditioning pipeline of the electric vehicle through a heat exchanger.
5. The automatic thermal runaway protection device for power batteries according to claim 1, wherein the number of the injection valves is equal to and corresponds to the number of the battery modules one by one, and each injection valve is arranged towards the corresponding battery module.
6. The automatic thermal runaway protection device for power battery as claimed in claim 1, wherein a circulation solenoid valve is further installed on the circulation pipeline.
7. The automatic thermal runaway protection device for power batteries according to claim 1, wherein a plurality of battery modules are arranged in a matrix in the box body, and the circulating pipeline is laid in a serpentine shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921138613.6U CN210074096U (en) | 2019-07-19 | 2019-07-19 | Power battery thermal runaway automatic protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921138613.6U CN210074096U (en) | 2019-07-19 | 2019-07-19 | Power battery thermal runaway automatic protection device |
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| CN210074096U true CN210074096U (en) | 2020-02-14 |
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| CN201921138613.6U Active CN210074096U (en) | 2019-07-19 | 2019-07-19 | Power battery thermal runaway automatic protection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380155A (en) * | 2019-07-19 | 2019-10-25 | 德萨智能科技(武汉)有限公司 | A kind of power battery thermal runaway automatic safety device |
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2019
- 2019-07-19 CN CN201921138613.6U patent/CN210074096U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380155A (en) * | 2019-07-19 | 2019-10-25 | 德萨智能科技(武汉)有限公司 | A kind of power battery thermal runaway automatic safety device |
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