CN216085076U - Case lid, battery package box and power battery package - Google Patents
Case lid, battery package box and power battery package Download PDFInfo
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- CN216085076U CN216085076U CN202121904867.1U CN202121904867U CN216085076U CN 216085076 U CN216085076 U CN 216085076U CN 202121904867 U CN202121904867 U CN 202121904867U CN 216085076 U CN216085076 U CN 216085076U
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- fire extinguishing
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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
Abstract
The utility model is suitable for the field of power batteries, and provides a box cover which is used in a battery pack box body, wherein the box cover comprises: the cover plate is internally provided with an accommodating cavity; the fire extinguishing piece is arranged in the accommodating cavity and comprises a shell and a fire extinguishing agent filled in the shell; the cover plate is provided with a weakening part, the weakening part can break under the action of external force, and the fire extinguishing piece in the accommodating cavity falls onto the battery cell to extinguish the fire of the battery cell. The box cover can prevent the battery from catching fire when the battery is out of control due to heat, and the safety is high. The utility model also provides a battery pack box body and a power battery pack.
Description
Technical Field
The utility model belongs to the technical field of power batteries, and particularly relates to a box cover, a battery pack box body and a power battery pack.
Background
With the continuous development and breakthrough of the power battery technology, the endurance mileage is gradually increased, the charging time is greatly shortened, the problems of endurance anxiety and long charging time are solved, and new energy automobiles are more and more popular with consumers. Due to the technical reasons of the battery or under the external action of stress, thermal stimulation and the like, the lithium ion battery can be thermally out of control, the instantaneously generated high temperature can reach over 1000 ℃, and once a fire breaks out, the life and property loss of drivers and passengers is inevitably caused, and serious safety accidents are caused in serious cases.
SUMMERY OF THE UTILITY MODEL
The utility model provides a box cover, a battery pack box body and a power battery pack, which can prevent a fire phenomenon from occurring when a battery is out of control due to heat and have higher safety.
The embodiment of the utility model provides a box cover, which is used in a battery pack box body, and comprises:
the cover plate is internally provided with an accommodating cavity;
the fire extinguishing piece is arranged in the accommodating cavity and comprises a shell and a fire extinguishing agent filled in the shell;
wherein, be equipped with the portion of weakening on the above-mentioned apron, the portion of weakening can take place to break under the exogenic action, supplies the piece of putting out a fire of holding the intracavity falls to electric core on to put out a fire to electric core.
Above-mentioned case lid is including being equipped with the apron that holds the chamber and accept in the piece of putting out a fire that holds the intracavity, because the portion of weakening on the apron can break when receiving the impact of external force such as gas fire stream, makes the piece of putting out a fire from weakening the portion and falling to electric core on, and the shell of the piece of just putting out a fire breaks and releases the fire extinguishing agent, and the fire extinguishing agent can play to put out a fire and cool down the effect to electric core. Therefore, the box cover can extinguish fire in time, prevent the fire from happening when the battery core is out of control due to heat, and has high safety;
in one embodiment, the outer shell is spherical and comprises two connected hemispherical shells.
Through adopting above-mentioned technical scheme, the piece of putting out a fire can roll smoothly to the portion of weakening of apron and fall on electric core.
In one embodiment, the diameter of the housing is 10-30 mm.
By adopting the technical scheme, the diameter of the shell is smaller than that of the battery cell explosion-proof valve, and the fire extinguishing piece can be poured into the battery cell from the battery cell explosion-proof valve, so that external oxygen is isolated for the battery cell; moreover, the fire extinguishing agent can react with chemical gas generated in the battery core to prevent the diaphragm in the battery core from being further damaged, so that the fire extinguishing effect is better.
In one embodiment, the shell has a wall thickness of 1-2mm, and the shell is selected from Na2SiO3Outer shell, CaSiO3Outer shell, SiO2Outer shell, Na2O·CaO·6SiO2Any one of the housings.
Through adopting above-mentioned technical scheme, the wall thickness of shell is thinner and have fragile performance, receives the collision and takes place the fracture when falling to the electric core surface to release extinguishing agent.
In one embodiment, the fire extinguishing agent is sodium bicarbonate powder.
By adopting the technical scheme, NaHCO is adopted at high temperature3Decomposition reaction can occur, and a large amount of heat is absorbed, so that the temperature of the battery cell can be effectively reduced; NaHCO 23Na produced by decomposition2CO3Can react with HF, thus reducing the corrosion of the diaphragm; CO produced by the above reaction2Oxygen in the air has been completely cut off to a certain extent, has also reduced combustible gas concentration simultaneously, the combustible gas burning appears when preventing electric core thermal runaway.
In one embodiment, the thickness of the weakened portion is less than the thickness of the rest of the cover plate.
Through adopting above-mentioned technical scheme, when receiving the impact of gas fire stream, the weak part breaks easily, makes the piece of putting out a fire fall to electric core.
In one embodiment, the melting point of the weakened portion is less than one-half of the melting point of the cover plate.
Through adopting above-mentioned technical scheme, the portion of weakening can take place to break when receiving high-temperature gas's impact, and the confession holds the piece of putting out a fire of intracavity and falls to electric core.
The embodiment of the present invention further provides a battery pack case, including:
the box frame is used for fixing a plurality of battery cells;
the box cover according to any one of the above embodiments, wherein the cover is provided on the box frame.
Through adopting above-mentioned technical scheme, above-mentioned battery package box includes the case lid, is equipped with the piece of putting out a fire in the case lid, and is equipped with the weakening portion on the apron, and when the thermal runaway, the weakening portion atress is broken, and the piece of putting out a fire can be from weakening the portion and putting out a fire to electric core on, prevents that the battery from appearing the phenomenon of catching fire when the thermal runaway, and the security is higher.
The embodiment of the present invention further provides a power battery pack, including:
a battery pack case; and
and the battery cells are arranged in the battery pack box body.
Through adopting above-mentioned technical scheme, above-mentioned power battery package is equipped with the piece of putting out a fire including the battery package box in the case lid in the battery package box, and is equipped with weakening portion on the apron, and when the thermal runaway, the piece of putting out a fire can be from weakening the portion and putting out a fire to electric core on, prevents that the battery from appearing the phenomenon of catching fire when the thermal runaway, and the security is higher. The power pack can be used in the electric automobile, avoids large-scale fire caused by thermal runaway of the battery cell, and effectively ensures the life and property safety of drivers and passengers.
In one embodiment, the top of each battery cell is provided with a plurality of battery cell explosion-proof valves, and the weakening parts are respectively opposite to the battery cell explosion-proof valves;
the diameter of the fire extinguishing piece is smaller than the minimum size of the battery cell explosion-proof valve, and the fire extinguishing piece can fall into the battery cell from the battery cell explosion-proof valve.
Through adopting above-mentioned technical scheme, when thermal runaway, the weak part takes place to break, and the piece of putting out a fire is through weak part and electric core explosion-proof valve in proper order, and inside reentrant electric core to directly put out a fire to electric core through the fire extinguishing agent, fire extinguishing effect is better.
According to the power battery pack, the battery pack box body and the box cover provided by the embodiment of the utility model, the weakening part is arranged on the box cover, and the fire extinguishing piece is arranged in the box cover, so that the electric core can be effectively and timely extinguished through the fire extinguishing piece, and no additional power device or additional control system is required for driving. Therefore, the power battery pack, the battery pack box body and the box cover can avoid large-scale fire caused by thermal runaway of the battery core, the safety is high, and the life and property safety of drivers and passengers is effectively guaranteed.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions 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 it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic perspective view of a power battery pack provided in an embodiment of the present invention;
FIG. 2 is an exploded perspective view of the power battery pack of FIG. 1;
FIG. 3 is a schematic perspective view of a cover of the power battery pack shown in FIG. 1;
fig. 4 is a cross-sectional view of the cover shown in fig. 3 taken along line a-a.
The designations in the figures mean:
1. a power battery pack;
100. a battery pack case;
10. a box cover; 11. a cover plate; 101. an accommodating chamber; 111. a weakening section; 12. a fire extinguishing member;
20. a box frame; 21. a battery box explosion-proof valve; 22. a liquid inlet; 23. a liquid outlet;
200. an electric core; 210. a battery cell explosion-proof valve; 220. copper bars are arranged.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings, which are examples. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered limiting of the present application.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
To illustrate the technical solution of the present invention, the following description is made with reference to the specific drawings and examples.
Referring to fig. 1 and fig. 2, an embodiment of the utility model provides a power battery pack 1, which includes a battery pack case 100 and a plurality of battery cells 200 disposed in the battery pack case 100. A plurality of electric cores 200 set up in rows, and all be equipped with electric core explosion-proof valve 210 on each electric core 200, and a set of electric core 200 realizes the electricity through copper bar 220 and connects.
The battery pack case 100 includes a case cover 10 and a case frame 20, wherein an accommodating space for accommodating the plurality of battery cells 200 is formed in the case frame 20, and the case cover 10 is disposed on the case frame 20 to protect the plurality of battery cells 200 together with the case frame 20.
Referring to fig. 1 to 4, the cover 10 includes a cover plate 11 having a receiving cavity 101, and a fire extinguishing member 12 disposed in the receiving cavity 101. The extinguishing member 12 includes a housing and an extinguishing agent (not shown) filled in the housing. The shell can protect the fire extinguishing agent and prevent the fire extinguishing agent from being affected by damp to affect the using effect; the fire extinguishing agent is used to lower the temperature of the cell 200 and extinguish the flame.
In fig. 4, the cover plate 11 is provided with a weakening portion 111, and the weakening portion 111 can be broken under an external force, so that the fire extinguishing member 12 in the accommodating cavity 101 falls onto the battery cell 200 to extinguish the fire of the battery cell 200.
In one embodiment, the weakenings 111 may be chipped under the impact of the stream of gas and fire; the casing of the fire extinguishing member 12 can be broken by force or heat to release the fire extinguishing agent, so as to extinguish the fire of the battery cell 200 by the fire extinguishing agent.
Preferably, in order to improve the fire extinguishing effect, the number of the fire extinguishing members 12 is plural, and a plurality of fire extinguishing members 12 are arrayed and filled in the accommodating cavity 101.
The power battery pack 1 can prevent the fire accident when thermal runaway, and the use principle is as follows:
when the battery cell 200 is out of control due to heat, high-temperature or high-pressure gas generated inside the battery cell 200 may burst through the battery cell explosion-proof valve 210 and be released from the battery cell 200, and the high-temperature or high-pressure gas may accompany with flame to form gas-fire flow, and the weakening part 111 on the cover plate 11 is broken by the impact of the gas-fire flow, so that an opening region is formed on the cover plate 11; the fire extinguishing member 12 in the accommodating cavity falls onto the battery cell 200 from the weakened part 111 after rupture, the shell of the fire extinguishing member 12 is stressed or is heated to rupture and release a large amount of fire extinguishing agent, the fire extinguishing member 12 cannot burst due to increase of internal pressure, and the fire extinguishing agent can reduce the temperature of the battery cell 200 and/or extinguish flame, so that the fire extinguishing effect is achieved.
As shown in fig. 4, the case cover 10 includes a cover plate 11 provided with a containing cavity 101 and a fire extinguishing member 12 contained in the containing cavity 101, and the weakening portion 111 on the cover plate 11 can be broken under the action of an external force, so that the fire extinguishing member 12 falls onto the battery cell 200, and the shell of the fire extinguishing member 12 is broken to release a fire extinguishing agent, which can perform the functions of extinguishing a fire and cooling the battery cell 200. Therefore, the box cover 10 can extinguish fire in time, prevent the fire from happening when the battery cell 200 is out of control due to heat, and has high safety; similarly, the battery pack case 100 and the power battery pack 1 having the case cover 10 can prevent the fire from occurring in the battery cell 200 during thermal runaway, and have high safety.
In one embodiment, the outer shell is spherical and comprises two connected hemispherical shells. So, can arrange the fire extinguishing agent in the hemisphere shell earlier, connect into the shell with two hemisphere shells again, and two hemisphere shells sealing connection to strengthen damp-proof effect. Since the casing is spherical, the fire extinguishing member 12 can smoothly roll to the weakened portion 111 of the cover plate 11 and fall onto the battery cell 200.
It is understood that the housing may have other shapes such as a rectangular shape, so long as the extinguishing member 12 can penetrate the weakened portion 111. For example, the case is rectangular, and the weakened portion 111 of the cover plate 11 is provided with an inclined surface, so that the fire extinguishing member 12 can smoothly fall onto the battery cell 200 from the inclined surface.
In one embodiment, the shell has a wall thickness of 1-2mm, and is made of a silicate double salt, for example, Na2SiO3Outer shell, CaSiO3Outer shell, SiO2Outer shell, Na2O·CaO·6SiO2Any one of the housings.
Through adopting above-mentioned technical scheme, the wall thickness of shell is thinner, and the shell has breakable performance, receives the collision and takes place the fracture when falling on electric core 200 to release fire extinguishing agent. It will be appreciated that other frangible materials, or composite materials with desiccating properties, may be used for the housing.
In another embodiment, the housing may also be melted by heat to expose the fire suppressant.
In one embodiment, the casing of the fire extinguishing member 12 is spherical and has a diameter of 10-30mm, and the diameter of the casing can be smaller than the minimum size of the cell explosion-proof valve 210, so that the fire extinguishing member 12 can be poured into the interior of the cell 200 from the cell explosion-proof valve 210, thereby isolating external oxygen from the cell 200 and preventing the fire from becoming large; and, the fire extinguishing agent may react with the chemical gas generated inside the battery cell 200 to prevent the separator inside the battery cell 200 from being further damaged, and at the same time, the chemical reactions may absorb a large amount of heat, thereby lowering the temperature of the battery cell 200.
In one embodiment, the fire extinguishing agent is sodium bicarbonate (NaHCO)3) The powder fire extinguishing agent, sodium bicarbonate is commonly called baking soda, has wide source, low price, no toxicity and environmental protection. It can be understood that the foam fire extinguisher cannot be used for extinguishing fire by the electrical equipment, and the main component of the foam fire extinguisher is NaHCO3Solution, mainly due to NaHCO3The solution is a strong electrolyte which can conduct electricity and easily cause a wider range of fire, so the extinguishing agent adopted in the embodiment is sodium bicarbonate solid powder.
By using NaHCO3As the fire extinguishing agent, the following advantageous effects are obtained.
First, NaHCO at high temperature3The following decomposition reactions can occur: 2NaHCO3＝Na2CO3+H2O+CO2The reaction is endothermic; and Na2CO when the high-temperature combustible gas is near 851 DEG C3A melting phenomenon occurs, and a large amount of heat is absorbed, so that the temperature of the battery cell 200 can be effectively reduced.
Next, LiPF6 in the electrolyte is decomposed into PF5And LiF, PF5The reaction with trace amounts of water and organic solvents produces toxic, corrosive HF gas, PF5HF can corrode the diaphragm in the cell 200; and NaHCO3Na produced by decomposition2CO3Will react with HF as follows: na (Na)2CO3+2HF＝2NaF+H2O+CO2And corrosive substances generated inside the battery cell 200 are consumed, so that the corrosion to the diaphragm is reduced, the short circuit risk in the power battery pack 1 is reduced, and the effect of effectively slowing down thermal runaway is achieved.
In addition, the product CO produced by the above reaction2To a certain extent isolating oxygen in the air and simultaneously reducing the concentration of combustible gas, andafter the combustible substance is reduced to a certain concentration, open fire can not be generated even if the combustible substance is contacted with air, so that the combustible gas combustion can be prevented when the electric core 200 is out of control due to heat, the toxic gas can be converted into a non-toxic substance in the whole chemical reaction process, and new harmful substances can not be generated.
It is understood that the fire extinguishing agent is not limited to the sodium bicarbonate powder fire extinguishing agent, and may be other types of fire extinguishing agents as long as the fire extinguishing agent is suitable for extinguishing the fire of the battery cell 200.
In one embodiment, the thickness of the weakened portion 111 is smaller than the thickness of the rest of the cover plate 11. The weakened portion 111 is formed, for example, by providing a groove on the cover plate 11, so that the thickness of the weakened portion 111 is smaller than the thickness of the rest of the cover plate 11. In this way, when the fire flow impacts, the weakened portion 111 is easily broken, and the fire extinguishing material 12 falls on the battery cell 200.
In another embodiment, the weakened portion 111 may be configured to rupture after being impacted by air pressure or melt after being impacted by high temperature. For example, the melting point of the weakening portion 111 is lower than half of the melting point of the cover plate 11, so that the weakening portion 111 can be melted and broken by the impact of high-temperature gas, and the fire extinguishing member 12 in the accommodating cavity falls to the battery cell.
In an embodiment, as shown in fig. 2 and fig. 3, a plurality of cell explosion-proof valves 210 are disposed at the top of each cell 200, and the weakening portions 111 are respectively opposite to the plurality of cell explosion-proof valves 210; preferably, in the height direction of the battery cell 200, the weakening portion 111 can cover the battery cell explosion-proof valve 210; the diameter of the fire extinguishing member 12 is smaller than the minimum size of the cell explosion-proof valve 210, and the fire extinguishing member 12 can fall into the cell 200 from the cell explosion-proof valve 210.
Through adopting above-mentioned technical scheme, when thermal runaway, weakening portion 111 takes place to break, and piece 12 puts out a fire is through weakening portion 111 and electric core explosion-proof valve 210 in proper order, and reentrant electric core 200 is inside to put out a fire through the fire extinguishing agent in the piece 12 that puts out a fire, fire control effect is better.
In other embodiments, the number of the weakened portions 111 may also be one, for example, one weakened portion 111 is located in the middle of the cover plate 11 and covers all the battery cells 200; as another example, the weakened portions 111 are strip-shaped, and each weakened portion 111 corresponds to a row of cell explosion-proof valves 210. In addition, the diameter of the fire extinguishing member 12 may also be greater than or equal to the size of the cell explosion-proof valve 210, and at this time, the fire extinguishing agent can still fall into the cell 200 to extinguish the fire.
Optionally, a battery box explosion-proof valve 21 is arranged on the box frame 20, a liquid cooling plate is arranged at the bottom of the box frame 20, and is communicated with a liquid inlet 22 and a liquid outlet 23 of the liquid cooling plate, the liquid cooling plate can guide cooling liquid from the liquid inlet 22, the cooling liquid is used for heat dissipation of the battery core 200, and then the liquid cooling plate guides the cooling liquid from the liquid outlet 23. Thus, the battery pack case 100 can reduce the temperature of the battery cell 200 through the liquid cooling plate, and reduce the risk of thermal runaway.
Optionally, the inner surfaces of the case cover 10 and the case frame 20 are both provided with an insulating film (not shown), the insulating film can perform an insulating function between the battery pack case 100 and the battery cell 200, and the insulating film may be a PET film, but is not limited thereto.
In one embodiment, the power battery pack 1 includes a battery pack case 100 and a plurality of battery cells 200 disposed in the battery pack case 100, where the plurality of battery cells 200 are arranged in a row and each have a cell explosion-proof valve 210; the battery pack case 100 includes a case frame 20 for fixing the battery cell 200 and a case cover 10 covering the case frame 20, the case cover 10 includes a cover plate 11 and a plurality of fire extinguishing members 12 disposed in the cover plate 11, the cover plate 11 is provided with a plurality of weakening portions 111, each weakening portion 111 is respectively disposed opposite to the battery cell explosion-proof valve 210, and the weakening portion 111 is identical to the battery cell explosion-proof valve 210 in appearance. The fire extinguishing member 12 comprises a spherical shell and a fire extinguishing agent filled in the shell, wherein the fire extinguishing agent is sodium bicarbonate solid powder fire extinguishing agent, the shell is made of fragile materials, and the diameter of the shell is smaller than the minimum size of the cell explosion-proof valve 210.
The fire extinguishing principle of the power battery pack 1 is as follows.
When the battery cell 200 is out of control due to heat, the battery cell explosion-proof valve 210 is opened, the weakening part 111 of the cover plate 11 located right above the battery cell explosion-proof valve 210 is instantaneously broken after being impacted by the gas and fire flow, and the fire extinguishing member 12 is filled into the battery cell 200 from the box cover 10 through the battery cell explosion-proof valve 210, so that external oxygen is isolated; secondly, the fire extinguishing member 12 reacts with the chemical gas generated inside the battery cell 200 to prevent the diaphragm inside the battery cell 200 from being further damaged, as well asIn the meantime, these chemical reactions can absorb a large amount of heat inside the battery cell 200, and cool the battery cell 200; in addition, the product CO produced by the above reaction2The oxygen in the air is isolated to a certain extent, and the concentration of combustible gas is reduced, so that the fire phenomenon after thermal runaway is prevented.
Above-mentioned power battery package 1 can be used to among the electric automobile, and above-mentioned power battery package 1, battery package box 100 and case lid 10 can in time effectively carry out cooling and/or put out the flame in the electric core 200 to electric core 200, prevent that the inside diaphragm of electric core 200 is further destroyed, need not extra power device drive, also need not extra control system to whole chemical reaction process can turn into nontoxic material with toxic gas, also can not produce new harmful substance. The power battery pack 1, the battery pack box body 100 and the box cover 10 can extinguish fire in time, avoid large-scale fire caused by thermal runaway of the battery cell 200, and effectively guarantee the life and property safety of drivers and passengers.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A case lid for use in a battery pack case, the case lid comprising:
the cover plate is internally provided with an accommodating cavity;
the fire extinguishing piece is arranged in the accommodating cavity and comprises a shell and a fire extinguishing agent filled in the shell;
the cover plate is provided with a weakening part, the weakening part can break under the action of external force, and the fire extinguishing piece in the accommodating cavity falls onto the battery cell to extinguish the fire of the battery cell.
2. The case cover of claim 1, wherein: the shell is spherical and comprises two hemispherical shells which are connected.
3. The case cover of claim 2, wherein: the diameter of the shell is 10-30 mm.
4. The case cover of claim 1, wherein: the wall thickness of the shell is 1-2mm, and the shell is Na2SiO3Outer shell, CaSiO3Outer shell, SiO2Outer shell, Na2O·CaO·6SiO2Any one of the housings.
5. The case cover of any one of claims 1-4, wherein: the fire extinguishing agent is sodium bicarbonate powder fire extinguishing agent.
6. The case cover of any one of claims 1-4, wherein: the thickness of the weakening part is smaller than that of the rest parts of the cover plate.
7. The case cover of any one of claims 1-4, wherein: the melting point of the weakening portion is lower than one-half of the melting point of the cover plate.
8. A battery pack case, comprising:
the box frame is used for fixing a plurality of battery cells;
a lid according to any one of claims 1 to 7, provided on the frame.
9. A power battery pack, comprising:
the battery pack case of claim 8; and
and the battery cells are arranged in the battery pack box body.
10. The power battery pack of claim 9, wherein: the top of each battery cell is provided with a plurality of battery cell explosion-proof valves, and the number of the weakening parts is multiple and is respectively opposite to the plurality of battery cell explosion-proof valves;
the diameter of the fire extinguishing piece is smaller than the minimum size of the battery cell explosion-proof valve, so that the fire extinguishing piece can fall into the battery cell from the battery cell explosion-proof valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121904867.1U CN216085076U (en) | 2021-08-13 | 2021-08-13 | Case lid, battery package box and power battery package |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121904867.1U CN216085076U (en) | 2021-08-13 | 2021-08-13 | Case lid, battery package box and power battery package |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216085076U true CN216085076U (en) | 2022-03-18 |
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| CN202121904867.1U Active CN216085076U (en) | 2021-08-13 | 2021-08-13 | Case lid, battery package box and power battery package |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114927810A (en) * | 2022-04-11 | 2022-08-19 | 中国第一汽车股份有限公司 | Multifunctional battery cover plate, cover plate thickness determination method and power battery system |
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2021
- 2021-08-13 CN CN202121904867.1U patent/CN216085076U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114927810A (en) * | 2022-04-11 | 2022-08-19 | 中国第一汽车股份有限公司 | Multifunctional battery cover plate, cover plate thickness determination method and power battery system |
| CN114927810B (en) * | 2022-04-11 | 2024-04-09 | 中国第一汽车股份有限公司 | Multifunctional battery cover plate, cover plate thickness determining method and power battery system |
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