CN112652851B - Battery upper box assembly capable of delaying thermal runaway and battery assembly - Google Patents
Battery upper box assembly capable of delaying thermal runaway and battery assembly Download PDFInfo
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- CN112652851B CN112652851B CN202110063857.8A CN202110063857A CN112652851B CN 112652851 B CN112652851 B CN 112652851B CN 202110063857 A CN202110063857 A CN 202110063857A CN 112652851 B CN112652851 B CN 112652851B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
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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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- Battery Mounting, Suspending (AREA)
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Abstract
The invention relates to the technical field of thermal runaway of batteries, and discloses a battery upper box assembly capable of delaying thermal runaway and a battery assembly. Wherein can delay thermal runaway's battery and go up box assembly and include box body and explosion-proof valve, go up this internal isolated chamber and the gas channel that holds of injecing of box, it is equipped with the coolant liquid to hold the intracavity, gas channel is located the below that holds the chamber, it is configured to when battery monomer takes place thermal runaway to go up box body, the wall that holds between chamber and the gas channel can break so that hold chamber and gas channel intercommunication, upward be equipped with the air inlet with the gas channel intercommunication on the box body, the first flow area of air inlet is greater than the second flow area of gas channel's export, explosion-proof valve sets up on last box body, explosion-proof valve is configured to gaseous rush out explosion-proof valve when the pressure of the gas of gas channel's export is higher than preset pressure. The battery upper box assembly capable of delaying thermal runaway disclosed by the invention has the function of delaying the thermal runaway of the battery monomer.
Description
Technical Field
The invention relates to the technical field of thermal runaway of batteries, in particular to a battery upper box assembly capable of delaying thermal runaway and a battery assembly.
Background
The existing battery monomer adopts a high-energy and high-power lithium battery, so that battery thermal runaway is easy to occur, but the existing upper box assembly of the battery has no function of delaying thermal runaway, so that an independent thermal runaway protection system needs to be additionally added, and the production cost of the battery assembly is increased.
Disclosure of Invention
Based on the above, the invention aims to provide a battery upper box assembly capable of delaying thermal runaway, which has a function of delaying thermal runaway of a battery monomer.
The invention also provides a battery assembly, and the battery assembly does not need to be additionally provided with an independent thermal runaway protection system, so that the production cost of the battery assembly is reduced.
In order to achieve the purpose, the invention adopts the following technical scheme:
a battery top case assembly that retards thermal runaway comprising: the upper box body is internally provided with an isolated accommodating cavity and a gas channel, cooling liquid containing fire extinguishing agents is arranged in the accommodating cavity, the gas channel is positioned below the accommodating cavity, the upper box body is configured in such a way that when thermal runaway of a battery cell occurs, a wall surface between the accommodating cavity and the gas channel can be broken so as to enable the accommodating cavity to be communicated with the gas channel, the upper box body is provided with a gas inlet communicated with the gas channel, and the first flow area of the gas inlet is larger than the second flow area of an outlet of the gas channel; an explosion-proof valve disposed on the upper case body, the explosion-proof valve being configured such that when a pressure of gas at an outlet of the gas passage is higher than a preset pressure, the gas rushes the explosion-proof valve out of the upper case body.
As a preferable scheme of the battery upper box assembly capable of delaying thermal runaway, the ratio of the first flow-through area to the second flow-through area is 3-20.
As a preferable scheme of the battery upper box assembly capable of delaying thermal runaway, the first flow area of the gas inlet is gradually reduced along the flow direction of the gas.
As a preferable scheme of the battery upper box assembly capable of delaying thermal runaway, rifling is arranged on the inner wall of the gas channel.
As a preferable scheme of the battery upper box assembly capable of delaying thermal runaway, the ratio of the volume of the cooling liquid to the volume of the accommodating cavity is 0.85-0.97.
As a preferred scheme of the battery upper box body assembly capable of delaying thermal runaway, the upper box body comprises a mica box body, a ceramic box body, a polyurethane box body or a melamine box body, and the thickness of the upper box body is greater than or equal to 3 mm.
As an optimal scheme of the battery upper box assembly capable of delaying thermal runaway, the side edge of the upper box body is provided with an angular reinforcing convex rib, and the corner of the upper box body is provided with a double-layer reinforcing convex rib.
As an optimal scheme of the battery upper box assembly capable of delaying thermal runaway, the upper box body is provided with stamping convex ribs facing the battery monomer, the stamping convex ribs and the upper box body form two gas flow channels distributed in parallel, and the two gas flow channels are respectively positioned on two sides of the stamping convex ribs and are communicated with the gas inlet.
As a preferred scheme of a battery upper box assembly capable of delaying thermal runaway, the gas flow channel includes a first gas flow channel and a second gas flow channel, gas generated when thermal runaway of a battery monomer occurs flows through the first gas flow channel and the second gas flow channel in sequence, and a third flow area of the first gas flow channel is larger than a fourth flow area of the second gas flow channel.
A battery assembly comprises a battery monomer and the battery upper box assembly capable of delaying thermal runaway, wherein the battery monomer is positioned right below the battery upper box assembly capable of delaying thermal runaway.
The invention has the beneficial effects that: the first flow area of the air inlet of the battery upper box assembly capable of delaying thermal runaway is larger than the second flow area of the outlet of the gas channel, so that the explosion-proof valve is flushed out, the wall surface between the accommodating cavity and the gas channel is broken when thermal runaway of a battery monomer occurs, the accommodating cavity is communicated with the gas channel, and due to the fact that the coolant contains the fire extinguishing agent, the coolant can play a fire extinguishing role, so that the battery upper box assembly has the function of delaying thermal runaway of other battery monomers, and in addition, the coolant in the accommodating cavity can absorb a part of impact energy when the battery upper box assembly vibrates or collides, so that the battery upper box assembly has the shock absorption characteristic.
The battery assembly disclosed by the invention comprises the battery upper box assembly capable of delaying thermal runaway, and an independent thermal runaway protection system does not need to be additionally arranged, so that the battery assembly has the function of delaying the thermal runaway of a battery monomer, and the production cost of the battery assembly is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic diagram of an upper battery case assembly with thermal runaway delay in one orientation according to an embodiment of the invention;
FIG. 2 is a schematic diagram of an upper battery case assembly with a thermal runaway delay in another orientation according to an embodiment of the invention;
FIG. 3 is a cross-sectional view of an upper housing body that delays thermal runaway according to an embodiment of the invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
fig. 5 is a partial enlarged view of fig. 3 at B.
In the figure:
1. an upper case body; 101. an accommodating chamber; 102. a gas channel; 103. an air inlet; 104. a gas flow channel; 1041. a first gas flow path; 1042. a second gas flow channel; 11. angle-shaped reinforcing convex ribs; 12. double-layer reinforced convex ribs; 13. stamping a convex rib; 14. a step;
2. an explosion-proof valve.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment provides a battery upper box assembly capable of delaying thermal runaway, as shown in fig. 1 to 4, which includes an upper box body 1 and an explosion-proof valve 2, an isolated accommodating cavity 101 and a gas channel 102 are defined in the upper box body 1, a coolant containing a fire extinguishing agent is provided in the accommodating cavity 101, the gas channel 102 is located below the accommodating cavity 101, the upper box body 1 is configured to, when thermal runaway occurs in a battery cell, the wall surface between the containing cavity 101 and the gas channel 102 can be broken to enable the containing cavity 101 to be communicated with the gas channel 102, the upper box body 1 is provided with a gas inlet 103 communicated with the gas channel 102, the first flow area of the gas inlet 103 is larger than the second flow area of the outlet of the gas channel 102, the explosion-proof valve 2 is arranged on the upper box body 1, and the explosion-proof valve 2 is configured to flush the explosion-proof valve 2 out of the upper box body 1 when the pressure of the gas at the outlet of the gas channel 102 is higher than the preset pressure.
Because first circulation area is greater than the second circulation area for the pressure of the gas that gets into gas channel 102 is greater than the pressure of the gas of following gas channel 102 exhaust, thereby guarantees that explosion-proof valve 2 is rushed out, has avoided the emergence of the phenomenon that explosion-proof valve 2 can't be rushed out when battery thermal runaway, guarantees that the gas that produces can in time discharge when battery monomer takes place thermal runaway. Specifically, as shown in fig. 4, at the end of the gas channel 102, the flow area of the gas channel 102 gradually decreases.
When the battery monomer is out of control, not only can produce high-temperature high-pressure gas, but also can produce flame, and flame and high-temperature high-pressure gas can simultaneously act on the wall surface between the accommodating cavity 101 and the gas channel 102, so that the wall surface is broken, and the cooling liquid in the accommodating cavity 101 can extinguish the flame and reduce the temperature of the gas, thereby achieving the purpose of delaying the thermal runaway of other battery monomers.
Generally speaking, when thermal runaway occurs in a battery cell, the explosion-proof valve 2 is firstly flushed out to realize the pressure relief of gas, so that the explosion phenomenon of a battery assembly is avoided, then the wall surface between the accommodating cavity 101 and the gas channel 102 is broken, and the cooling liquid in the accommodating cavity 101 is poured out to extinguish flame and reduce the temperature of the gas, thereby achieving the purpose of delaying the thermal runaway of the other battery cells.
The first flow area of the air inlet 103 of the battery upper box assembly that this embodiment provided can delay thermal runaway is greater than the second flow area of the export of gas channel 102, make explosion-proof valve 2 flushed, the wall between chamber 101 and the gas channel 102 breaks when battery cell takes place thermal runaway, chamber 101 and gas channel 102 intercommunication hold, because contain fire extinguishing agent in the coolant liquid, make the coolant liquid can play the effect of putting out a fire, make this battery upper box assembly have the function of delaying remaining battery cell to take place thermal runaway, the coolant liquid that holds in the chamber 101 in addition can also absorb some impact energy when the battery upper box assembly vibrates or collides, make battery upper box assembly have the absorbing characteristic.
The gas duct 102 of the present embodiment is a duct formed according to NVH, CAE, and CFD simulation design. Preferably, the ratio of the first flow area to the second flow area of the present embodiment is 3 to 20. The ratio of the first flow area to the second flow area is 3-20, so that the explosion-proof valve 2 can be ensured to be flushed out in time, gas generated when the battery monomer is out of control due to thermal runaway can be discharged in time, the pressure of the gas generated when the battery monomer is out of control due to thermal runaway is reduced, and the phenomenon that the explosion-proof valve 2 can be flushed out when the pressure of the gas flowing through the gas inlet 103 is high is avoided. In other embodiments, the ratio of the first flow area to the second flow area may also be other values, and is specifically set according to actual needs.
As shown in fig. 3, the first flow area of the gas inlet 103 gradually decreases in the flow direction of the gas. Specifically, the gradual decrease in the first flow area of the gas inlet 103 gradually increases the pressure of the gas entering the gas passage 102 through the gas inlet 103, so that the gas smoothly flows into the gas passage 102, and eventually, the gas discharged through the outlet of the gas passage 102 is facilitated to flush the explosion-proof valve 2 out of the upper tank body 1.
The inner wall of the gas channel 102 is provided with rifling (not shown in the figure), the added rifling can make sharp sound when gas flows through the gas channel 102 to form alarm sound, the physical alarm structure is safe and reliable, and a user can timely know that thermal runaway of a battery monomer occurs, so that passengers can be effectively helped to escape.
The ratio of the volume of the cooling liquid to the volume of the accommodating chamber 101 in this embodiment is 0.85 to 0.97. If the volume of coolant liquid and the ratio undersize that holds the volume of chamber 101, when the free temperature of battery is higher, hold the gaseous volume increase in the chamber 101 more, make the volume that holds chamber 101 take place obvious change, go up the phenomenon that the swell may appear in box body 1, be unfavorable for last box body 1's use, the life of last box body 1 has been reduced, the volume of coolant liquid and the ratio undersize that holds the volume of chamber 101 simultaneously, make the content of coolant liquid less, be unfavorable for watering out flame. If the volume of coolant liquid is too big with the ratio of the volume that holds chamber 101, the coolant liquid is too much to make the coolant liquid can not rock in holding chamber 101, has weakened the absorbing characteristic of box assembly on the battery, is unfavorable for on the battery box assembly to absorb partly impact energy when vibrating or colliding, leads to on the battery box assembly to vibrate or produce easily when colliding and rock.
Further, the specific heat capacity of the cooling liquid of this embodiment is greater than or equal to 500J/(kg/K), and the great cooling liquid of specific heat capacity can effectively obstruct the influence of external temperature to the battery monomer, prevents that the battery monomer from overcooling or overheated under extreme temperature condition, promotes the free temperature uniformity of battery, promotes the free life of battery.
The last box body 1 of this embodiment is the mica box, and the thickness of going up box body 1 is more than or equal to 3 mm. Compared with the existing metal upper box body 1, the non-metal mica box body of the embodiment has lighter weight, large structural strength and the function of resisting the impact force of heat diffusion. In other embodiments, the upper box body 1 may also be a ceramic box, a polyurethane box, a melamine box, or an upper box body made of other non-metallic materials, which is specifically selected according to actual needs.
As shown in fig. 1, the side of the upper box body 1 of this embodiment is provided with an angle-shaped reinforcing rib 11, the corner of the upper box body 1 is provided with two layers of reinforcing ribs 12, the number of the two layers of reinforcing ribs 12 of this embodiment is four, and the four layers of reinforcing ribs 12 are respectively located at four corners of the upper box body 1. Protruding muscle 11 and the double-deck structural strength who strengthens protruding muscle 12 can promote box body 1 in the angle type that adds, through NVH, CAE, CFD simulation analysis, the structural strength of box body 1 can be guaranteed in the design of the protruding muscle 11 and the double-deck protruding muscle 12 of strengthening in the angle type that adds, guarantees the gaseous quick pressure release of production when battery monomer takes place the thermal runaway, prevents that gaseous pressure is too high to cause the fracture of box body 1.
The position of the corner reinforcing bead 11 is set as required. Specifically, at first carry out the software simulation to last box body 1 before box body 1 in mass production, the position that the side that obtains last box body 1 takes place to break when taking place thermal runaway through software simulation battery monomer, strengthen protruding muscle 11 through increasing the angle type in this cracked position and realize the reinforcement to the structural strength of last box body 1, the fracture of the side of last box body 1 when avoiding battery monomer to take place thermal runaway, the open flame that has prevented that battery monomer from taking place the thermal runaway production from stretching to the outside and the speed that thermal runaway takes place with higher speed through cracked last box body 1. Carry out a lot of optimal design to last box body 1 through NVH, CAE, CFD simulation design, in the requirement within range of experimental regulation, when battery monomer takes place thermal runaway, guarantee that the side of going up box body 1 can not take place to break, avoided the emergence of the phenomenon that flame outwards stretchs through cracked last box body 1.
As shown in fig. 1 and fig. 2, the protruding punching press protruding rib 13 towards the battery cell is arranged on the upper box body 1 of the embodiment, the punching press protruding rib 13 and the upper box body 1 form two gas flow channels 104 distributed in parallel, the two gas flow channels 104 are respectively located at two sides of the punching press protruding rib 13 and are communicated with the gas inlet 103, the electric wire is distributed under the punching press protruding rib 13, when the battery cell is out of thermal runaway, the gas flows to the gas inlet 103 from the gas flow channels 104 at two sides of the punching press protruding rib 13, no influence is generated on the electric wire, and the safety of the battery assembly is improved.
Specifically, as shown in fig. 2, the gas channels 104 include a first gas channel 1041 and a second gas channel 1042, gas generated when thermal runaway of a battery cell occurs flows through the first gas channel 1041 and the second gas channel 1042 in sequence, and a third flow area of the first gas channel 1041 is larger than a fourth flow area of the second gas channel 1042. Further, as shown in fig. 1 and fig. 2, a step 14 is provided on the upper case body 1, and the width and the depth of the first gas flow channel 1041 are respectively smaller than the width and the depth of the second gas flow channel 1042, so that the gas generated when the thermal runaway of the battery cell occurs is released through the first gas flow channel 1041, the second gas flow channel 1042, the gas inlet 103 and the gas channel 102 in sequence, thereby avoiding the internal gas flowing disorder and preventing the upper case body 1 from being broken due to the over-high pressure of the gas.
The embodiment further provides a battery assembly, which includes a battery cell (not shown in the figure) and the battery upper case assembly described in this embodiment, where the battery cell is located right below the battery upper case assembly capable of delaying thermal runaway.
The battery assembly provided by the embodiment comprises the battery upper box assembly capable of delaying thermal runaway, and an independent thermal runaway protection system does not need to be additionally arranged, so that the battery assembly has the function of delaying thermal runaway of a battery monomer, and the production cost of the battery assembly is reduced.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A battery top case assembly that retards thermal runaway, comprising:
the battery pack comprises an upper box body (1) and a lower box body, wherein an isolated accommodating cavity (101) and a gas channel (102) are defined in the upper box body (1), a cooling liquid containing a fire extinguishing agent is arranged in the accommodating cavity (101), the gas channel (102) is positioned below the accommodating cavity (101), the upper box body (1) is configured in such a way that when thermal runaway of a battery cell occurs, a wall surface between the accommodating cavity (101) and the gas channel (102) can be broken so as to enable the accommodating cavity (101) to be communicated with the gas channel (102), an air inlet (103) communicated with the gas channel (102) is arranged on the upper box body (1), and a first flow area of the air inlet (103) is larger than a second flow area of an outlet of the gas channel (102);
an explosion-proof valve (2) disposed on the upper case body (1), the explosion-proof valve (2) being configured such that when a pressure of gas at an outlet of the gas passage (102) is higher than a preset pressure, the gas rushes the explosion-proof valve (2) out of the upper case body (1).
2. The battery upper case assembly capable of delaying thermal runaway of claim 1, wherein a ratio of the first flow area to the second flow area is 3-20.
3. The battery upper box assembly capable of delaying thermal runaway according to claim 1, wherein the first flow area of the gas inlet (103) is gradually reduced along the flow direction of the gas.
4. The battery upper box assembly capable of delaying thermal runaway according to claim 1, wherein rifling is arranged on the inner wall of the gas channel (102).
5. The battery upper box assembly capable of delaying thermal runaway according to claim 1, wherein the ratio of the volume of the cooling liquid to the volume of the containing cavity (101) is 0.85-0.97.
6. The battery upper box assembly capable of delaying thermal runaway according to claim 1, wherein the upper box body (1) comprises a mica box body, a ceramic box body, a polyurethane box body or a melamine box body, and the thickness of the upper box body (1) is greater than or equal to 3 mm.
7. The battery upper box assembly capable of delaying thermal runaway according to claim 1, wherein an angle-shaped reinforcing rib (11) is arranged on a side edge of the upper box body (1), and a double-layer reinforcing rib (12) is arranged at a corner of the upper box body (1).
8. The battery upper box assembly capable of delaying thermal runaway according to claim 1, wherein a stamping rib (13) protruding towards the battery cell is arranged on the upper box body (1), the stamping rib (13) and the upper box body (1) form two gas flow channels (104) distributed in parallel, and the two gas flow channels (104) are respectively located on two sides of the stamping rib (13) and are both communicated with the gas inlet (103).
9. The battery upper box assembly capable of delaying thermal runaway according to claim 8, wherein the gas flow channel (104) comprises a first gas flow channel (1041) and a second gas flow channel (1042), gas generated when thermal runaway of the battery cell occurs flows through the first gas flow channel (1041) and the second gas flow channel (1042) in sequence, and a third flow area of the first gas flow channel (1041) is larger than a fourth flow area of the second gas flow channel (1042).
10. A battery assembly, comprising a battery cell and the thermal runaway postponable battery upper case assembly according to any one of claims 1 to 9, wherein the battery cell is located right below the thermal runaway postponable battery upper case assembly.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110063857.8A CN112652851B (en) | 2021-01-18 | 2021-01-18 | Battery upper box assembly capable of delaying thermal runaway and battery assembly |
| PCT/CN2022/071984 WO2022152237A1 (en) | 2021-01-18 | 2022-01-14 | Battery upper box assembly and battery assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110063857.8A CN112652851B (en) | 2021-01-18 | 2021-01-18 | Battery upper box assembly capable of delaying thermal runaway and battery assembly |
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| CN112652851A CN112652851A (en) | 2021-04-13 |
| CN112652851B true CN112652851B (en) | 2022-03-15 |
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| WO (1) | WO2022152237A1 (en) |
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| CN112652851B (en) * | 2021-01-18 | 2022-03-15 | 中国第一汽车股份有限公司 | Battery upper box assembly capable of delaying thermal runaway and battery assembly |
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| CN112652851B (en) * | 2021-01-18 | 2022-03-15 | 中国第一汽车股份有限公司 | Battery upper box assembly capable of delaying thermal runaway and battery assembly |
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- 2021-01-18 CN CN202110063857.8A patent/CN112652851B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2022152237A1 (en) | 2022-07-21 |
| CN112652851A (en) | 2021-04-13 |
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