CN220873688U - Battery shell and power battery - Google Patents
Battery shell and power battery Download PDFInfo
- Publication number
- CN220873688U CN220873688U CN202322482450.6U CN202322482450U CN220873688U CN 220873688 U CN220873688 U CN 220873688U CN 202322482450 U CN202322482450 U CN 202322482450U CN 220873688 U CN220873688 U CN 220873688U
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- 239000012782 phase change material Substances 0.000 claims abstract description 31
- 230000017525 heat dissipation Effects 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 238000009833 condensation Methods 0.000 claims description 12
- 230000005494 condensation Effects 0.000 claims description 12
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model discloses a battery shell and a power battery, wherein the battery shell comprises an outer shell for coating an internal battery core of the power battery and an inner shell arranged in the middle of the internal battery core of the power battery; the inner shell is arranged in the outer shell, the outer shell and the inner shell are thin-wall double-layer cavity bodies, and the cavity bodies of the outer shell and the inner shell are communicated to form a whole sealed cavity body; the whole sealed cavity is encapsulated with a phase change material for heat dissipation. The battery shell is used for coating the battery core in the whole power battery, and the battery shell adopts the thin-wall cavity body in which the phase-change material for heat dissipation is packaged, and the phase-change material can realize the 'liquid-gas' conversion of the form in the whole sealed cavity body, so that the purpose of heat transfer is achieved, and the requirement of uniformity of internal and external temperatures of the power battery is met.
Description
Technical Field
The utility model relates to the technical field of power batteries of electric automobiles, in particular to a battery shell and a power battery.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The lithium ion battery is used as a driving force source of a new energy automobile, and is widely applied to the field of the new energy automobile due to the characteristics of environmental protection, recycling, small volume and the like. In order to improve the endurance of the electric automobile, the power battery is usually made of high-capacity and high-voltage materials during design, but meanwhile, the safety performance of the power battery with high energy density is poor, and under some extreme working conditions and high-temperature weather, the power battery is easy to trigger thermal runaway, so that a fire combustion event is caused; moreover, in order to pursue higher volume utilization of the battery system, the design of the battery cell is increasingly larger, such as the cylindrical battery evolves from 18650 model to 4680 model, the diameter of the battery is increased, meanwhile, the uniformity of the temperature inside the battery is poor, the middle temperature of the battery cell is significantly higher than the outer temperature of the battery shell, and imbalance of the temperature of the power battery presents great challenges for thermal management of the battery.
In order to solve the problem of poor uniformity of internal temperature of the battery, chinese patent application No. CN207743271U proposes a battery case with a heat dissipating tube and a battery, which increases the speed of heat transfer from the surface of the battery by adding the heat dissipating tube to the battery case, thereby improving the cooling efficiency of the battery. However, this method can only enhance the heat conduction efficiency through the surface, and the heat inside the battery cell is still difficult to be efficiently conducted out, so that the problem of internal and external temperature difference of the battery is still not solved.
The chinese patent with application number CN113224407a proposes a heat-balanced high-capacity battery, in which a heat-dissipating heat pipe is implanted in the battery, and the heat in the battery is rapidly led out to the battery casing through the high heat-conducting efficiency of the heat pipe, so as to improve the overall temperature uniformity of the battery. The method can improve the temperature difference between the inside and the outside of the battery to a certain extent, but the heat is led into the battery shell, the heat on the shell can not be led out of the system efficiently, the heat transfer does not form a closed loop, and the improvement effect is limited.
The patent with the application number of CN115513576A proposes a square battery shell manufactured by additive, wherein a plurality of baffle-type cooling flow channels are arranged in the battery, so that the heat dissipation and the temperature uniformity of the battery are improved, but the method has a complex structure, and a plurality of flow channel joints are arranged in the battery, so that the risk of leakage of cooling liquid is easily caused.
Disclosure of utility model
Aiming at the problems and defects in the prior art, the utility model provides a battery shell and a power battery, wherein the battery shell is used for coating an internal battery core of the whole power battery, and the battery shell adopts a thin-wall cavity body with a heat-dissipation phase-change material packaged in the cavity body, and is combined with a condensing plate, so that the safe and efficient rapid equalization of the internal temperature and the external temperature of the power battery is realized, and the problem of large internal and external temperature difference of the large power battery in the prior art is solved.
In order to achieve the above object, in a first aspect, the present utility model provides a battery case.
A battery shell comprises an outer shell for coating an internal battery core of a power battery and an inner shell arranged in the middle of the internal battery core of the power battery;
the inner shell is arranged in the outer shell, the outer shell and the inner shell are thin-wall double-layer cavity bodies, and the cavity bodies of the outer shell and the inner shell are communicated to form a whole sealed cavity body; the whole sealed cavity is encapsulated with a phase change material for heat dissipation.
Further technical proposal, the utility model also comprises a cover plate; the cover plate is matched with the shell, and is contacted with the top surface of the shell of the inner battery core of the coated power battery; and the cover plate is also provided with a positive pole and a negative pole.
According to a further technical scheme, the battery shell is made of any one of stainless steel, metal aluminum, brass and nickel.
According to a further technical scheme, the phase-change material packaged in the cavity of the battery shell is any one of acetone, ethanol and methanol, and the temperature of gas-liquid conversion of the phase-change material is 40-80 ℃.
According to a further technical scheme, the thin-wall double-layer cavity comprises an upper layer wall surface and a lower layer wall surface, and the upper layer wall surface and the lower layer wall surface are connected through a reinforcing structure; the reinforcing structure is a plurality of same cylindrical structures, square column structures or strip structures.
According to a further technical scheme, the outer shell is a cuboid shell, each surface of the cuboid shell is a thin-wall double-layer cavity, and each surface of the thin-wall double-layer cavity is communicated; the inner shell is a thin-wall double-layer cavity arranged at the middle part of the battery cell in the power battery, the inner shell is arranged in the outer shell, the inner shell is identical and parallel to one side surface of the outer shell, and the periphery of the inner shell is communicated with the cavity of the outer shell.
In a further embodiment, the bottom surface of the battery case is placed on a cooling condensation plate.
According to a further technical scheme, the outer shell is a cylindrical shell, the side face, the top face and the bottom face of the cylindrical shell are all thin-wall double-layer cavity bodies, and the thin-wall double-layer cavity bodies of the side face, the top face and the bottom face are communicated; the inner shell is of a vertical rod structure arranged at the middle part of an electric core inside the power battery, the vertical rod structure is a thin-wall double-layer cavity, the inner shell is arranged inside the outer shell, the inner shell is co-tall and parallel to the side face of the outer shell, and the top end and the bottom end of the inner shell are respectively communicated with the top face and the bottom face cavity of the outer shell.
Further technical scheme, a plurality of battery casings all closely laminate with the cooling condensation plate that the battery casing side was placed.
In a second aspect, the present utility model provides a power cell.
A power battery comprising a battery housing according to the first aspect, a power battery internal cell being disposed in the battery housing.
Compared with the prior art, the utility model has the following beneficial effects:
The utility model provides a battery shell for improving the temperature uniformity of a power battery and the power battery, wherein the battery shell is used for coating an internal cell of the whole power battery, the battery shell adopts a thin-wall cavity body with a heat-dissipation phase-change material packaged in the cavity body, and the phase-change material can realize the 'liquid-gas' conversion of the form in the whole sealed cavity body, so that the purpose of heat transfer is achieved, and the requirement of the internal and external temperature uniformity of the power battery is met; through the battery shell that is equipped with phase change material, combine the condensate plate, realize safe and the inside and outside temperature of efficient power battery is balanced fast, solve the big problem of outside difference in temperature in the large-scale power battery among the prior art.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.
Fig. 1 is a schematic view of a battery case adapted for a square power battery in accordance with the present utility model;
FIG. 2 is a side view of a battery housing of the present utility model adapted for use with a square power battery that does not include a top surface;
FIG. 3 is a schematic view of a battery case with a cover plate for a prismatic power battery according to the present utility model;
FIG. 4 is a cross-sectional view of a battery housing with cover plate suitable for use in a square power battery in accordance with the present utility model;
FIG. 5 is a schematic view of the reinforcement structure of the present utility model in a plurality of identical cylindrical structures;
FIG. 6 is a schematic view of a reinforcing structure of the present utility model in a plurality of square column structures;
FIG. 7 is a schematic view of the structure of the reinforcing structure of the present utility model in a plurality of bar-shaped structures;
fig. 8 is a schematic view showing a structure in which a battery case is placed on a condensing plate in the present utility model;
FIG. 9 is a schematic diagram of the condensation of phase change material in a battery housing according to the present utility model;
Fig. 10 is a schematic view of a battery case adapted for a cylindrical power battery in accordance with the present utility model;
FIG. 11 is a side view of a battery housing of the present utility model adapted for use with a cylindrical power cell that does not include a top surface;
FIG. 12 is a schematic view of a battery case with a cover plate adapted for use in a cylindrical power battery in accordance with the present utility model;
FIG. 13 is a cross-sectional view of a battery housing with cover plate suitable for use in a cylindrical power battery in accordance with the present utility model;
fig. 14 is a schematic view showing a structure in which a plurality of battery cases are closely attached to a condensation plate in the present utility model.
Wherein, 1, the outer shell; 2. a battery internal cell; 3. an inner housing; 4. a cover plate; 5. a positive electrode post; 6. a negative electrode column; 7. a condensing plate; 8. a phase change material; 1-1, upper layer wall surface; 1-2, a lower wall surface; 1-3, reinforcing structure.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components, and/or groups thereof.
The terms "mounted," "connected," "secured," and the like in the present utility model are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the two components can be directly connected, or indirectly connected through an intermediate medium, or internally connected or in interaction relation with each other; it will be understood by those of ordinary skill in the art that the foregoing terms are of a specific meaning in the present disclosure, and are not to be construed as limiting the present disclosure.
Example 1
As shown in fig. 1 and 2, the present embodiment discloses a battery case for improving temperature uniformity of a power battery, including an outer case for covering an internal cell of the power battery and an inner case disposed at a middle portion of the internal cell of the power battery, where the inner case is disposed inside the outer case, the outer case and the inner case are both thin-wall double-layer hollow bodies, and the hollow bodies of the outer case and the inner case are communicated to form a whole sealed hollow body; the phase change material for heat dissipation is packaged in the whole sealed cavity, and the phase change material can realize the 'liquid-gas' conversion of the form in the whole sealed cavity, thereby achieving the purpose of heat transfer and meeting the requirement of uniformity of internal and external temperatures of the power battery.
In this embodiment, the above disclosed battery case for improving temperature uniformity of a power battery is suitable for a square power battery, as shown in fig. 3 and 4, the battery case includes an outer case 1 and an inner case 3, an inner battery cell 2 of the square power battery is placed in the outer case 1, the outer case 1 covers the inner battery cell 2 of the whole battery, meanwhile, an inner case 3 is disposed in the middle of the inner battery cell of the square power battery, and the inner case 3 and the outer case 1 are both thin-wall double-layer hollow bodies and the hollow bodies of the outer case 1 and the inner case 3 are communicated. Specifically, the outer shell 1 is a cuboid shell, each side of the cuboid shell is a thin-wall double-layer cavity, and each side of the thin-wall double-layer cavity is communicated; the inner shell 3 is a thin-wall double-layer cavity arranged on one surface of the middle part of the power battery, the inner shell 2 is arranged in the outer shell 1 and is identical to one side surface (the same area and the same size) of the outer shell 1 in parallel, and the periphery of the inner shell 2 is communicated with the cavity of the outer shell 1.
Further, the battery case further comprises a cover plate 4, the cover plate 4 is matched with the outer case 1, the cover plate 4 is in contact with the top surface of the outer case 1 of the power battery inner battery core 2 coated with the cover plate, the cover plate 4 is further provided with a positive pole 5 and a negative pole 6, and the power battery inner battery core 2 coated with the outer case passes through the top surface of the outer case 1 through the lugs and is connected with the positive pole and the negative pole on the cover plate.
As another embodiment, the top surface of the outer shell is detachable, so that the phase change material for heat dissipation can be conveniently packaged, and the inner battery core of the power battery can be conveniently placed.
Furthermore, in this embodiment, the hollow cavities of the outer casing and the inner casing are communicated to form a whole sealed hollow cavity, and the hollow cavity is always kept sealed, and the whole sealed hollow cavity is encapsulated with a heat-dissipating phase-change material, so that the phase-change material can realize the form of liquid-gas conversion in the whole sealed hollow cavity, thereby achieving the purpose of transferring heat and meeting the requirement of uniformity of internal and external temperatures of the power battery.
Further, as shown in the application scenario of the square power battery shown in fig. 8, the bottom surface of the battery case is placed on a cooling condensation plate 7 (in this embodiment, the condensation plate is a water-cooled plate), when the temperature of the battery core is higher, the phase-change material in the cavity of the outer case is vaporized, evaporated and absorbed, and is liquefied when the part of the condensation plate is cooled, so that the temperature of the outer case and the middle part of the battery core is transferred onto the condensation plate to be cooled, and the temperature difference between the inside and outside of the battery core is reduced. As shown in fig. 9, the temperature of the gas-liquid conversion of the phase change material 8 encapsulated in the cavity of the battery shell is 40-80 ℃, and the phase change material is responsible for vaporization, evaporation and heat absorption (the evaporation section on the right side of fig. 9) when the temperature of the battery core of the power battery is higher, and is liquefied when meeting cold (the condensation section on the left side of fig. 9) at the condensation plate part, so that the temperature of the shell and the middle part of the battery core is transferred to the condensation plate to be cooled, and the temperature difference between the inside and the outside of the battery core is reduced.
Further, the thin-wall double-layer cavity comprises an upper layer wall surface 1-1 and a lower layer wall surface 1-2, and the upper layer wall surface 1-1 and the lower layer wall surface 1-2 are connected through a reinforcing structure 1-3, so that the pressure resistance and the deformation resistance of the thin-wall double-layer cavity are enhanced. Preferably, as shown in fig. 5, 6 and 7, the reinforcing structure 1-3 is a plurality of identical cylindrical structures, square columnar structures or bar-shaped structures. Through the arrangement, the smooth flowing of the phase change material can be ensured, and meanwhile, the strength of the thin-wall cavity can be greatly enhanced.
Further, the battery case may be made of stainless steel, aluminum metal, brass, nickel, etc., and in this embodiment, aluminum metal is preferable.
Further, the phase change material encapsulated in the cavity of the battery case may be acetone, ethanol, methanol, etc., and in this embodiment, acetone is preferred.
Example two
The embodiment discloses a power battery, which comprises the battery shell for improving the temperature uniformity of the power battery according to the embodiment, wherein an internal electric core of the power battery is arranged in the battery shell.
Example III
The present embodiment discloses a battery case for improving temperature uniformity of a power battery, which is similar to the battery case structure disclosed in the first embodiment, except that the battery case proposed in the present embodiment is applicable to a cylindrical power battery.
As shown in fig. 10 and 11, the battery case proposed in this embodiment includes an outer case 1 for covering the internal cell of the power battery and an inner case 3 disposed in the middle of the internal cell of the power battery, where the inner case is disposed in the outer case, the outer case and the inner case are both thin-walled double-layered hollow bodies, and the hollow bodies of the outer case and the inner case are communicated to form an entire sealed hollow body; the phase change material for heat dissipation is packaged in the whole sealed cavity, and the phase change material can realize the 'liquid-gas' conversion of the form in the whole sealed cavity, thereby achieving the purpose of heat transfer and meeting the requirement of uniformity of internal and external temperatures of the power battery.
In this embodiment, the above disclosed battery case for improving temperature uniformity of a power battery is suitable for a cylindrical power battery, as shown in fig. 12 and 13, the battery case includes an outer case 1 and an inner case 3, an inner battery cell 2 of the cylindrical power battery is placed in the outer case 1, the outer case 1 covers the whole inner battery cell 2, meanwhile, an inner case 3 is disposed in the middle of the inner battery cell of the cylindrical power battery, and the inner case 3 and the outer case 1 are all thin-wall double-layer hollow bodies and the hollow bodies of the outer case 1 and the inner case 3 are communicated. Specifically, the outer shell 1 is a cylindrical shell, the side face, the top face and the bottom face of the cylindrical shell are all thin-wall double-layer cavity bodies, and the thin-wall double-layer cavity bodies of the side face, the top face and the bottom face are communicated; the inner shell 3 is a vertical rod structure arranged at the middle part of an electric core in the power battery, the vertical rod structure is a thin-wall double-layer cavity, the inner shell 2 is arranged in the outer shell 1 and is co-tall and parallel with the side surface of the outer shell 1, and the top end and the bottom end of the inner shell 2 are respectively communicated with the top surface and the bottom surface of the outer shell 1.
Further, the battery case further comprises a cover plate 4, the cover plate 4 is matched with the outer case 1, the cover plate 4 is in contact with the top surface of the outer case 1 of the power battery inner battery cell 2 coated with the cover plate, a pole is further arranged on the cover plate 4, and the power battery inner battery cell 2 coated with the outer case passes through the top surface of the outer case 1 through the pole lug and is connected with the pole on the cover plate.
Furthermore, in this embodiment, the hollow cavities of the outer casing and the inner casing are communicated to form a whole sealed hollow cavity, and the whole sealed hollow cavity is encapsulated with a phase change material for heat dissipation, and the phase change material can realize the form of liquid-gas conversion in the whole sealed hollow cavity, so that the purpose of transferring heat is achieved, and the requirement of uniformity of internal and external temperatures of the power battery is met.
Further, as shown in the application scenario of the cylindrical power battery shown in fig. 14, the battery shells are tightly attached to the cooling condensing plate 7 (in this embodiment, the condensing plate is a water-cooled plate), when the temperature of the battery core is higher, the phase-change material in the cavity of the outer shell is vaporized, evaporated and absorbed, and is liquefied when the condensing plate is cooled, so that the temperature of the outer shell and the middle part of the battery core is accelerated to be transferred to the condensing plate for cooling, and the temperature difference between the inside and outside of the battery core is reduced.
Example IV
The embodiment discloses a power battery, which comprises a battery shell for improving temperature uniformity of the power battery, wherein an internal electric core of the power battery is arranged in the battery shell.
The utility model provides a battery shell for improving the temperature uniformity of a power battery and the power battery, wherein the battery shell is used for coating the whole power battery, and the battery shell adopts a thin-wall cavity body with a heat-dissipation phase-change material packaged in the cavity body, and is combined with a condensing plate, so that the safe and efficient rapid equalization of the internal and external temperatures of the power battery is realized, and the problem of large internal and external temperature difference of the large power battery in the prior art is solved.
While the foregoing description of the embodiments of the present utility model has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the utility model, but rather, it is intended to cover all modifications or variations within the scope of the utility model as defined by the claims of the present utility model.
Claims (10)
1. The battery shell is characterized by comprising an outer shell for coating an internal cell of the power battery and an inner shell arranged in the middle of the internal cell of the power battery;
the inner shell is arranged in the outer shell, the outer shell and the inner shell are thin-wall double-layer cavity bodies, and the cavity bodies of the outer shell and the inner shell are communicated to form a whole sealed cavity body; the whole sealed cavity is encapsulated with a phase change material for heat dissipation.
2. The battery housing of claim 1, further comprising a cover plate;
The cover plate is matched with the shell, and is contacted with the top surface of the shell of the inner battery core of the coated power battery; and the cover plate is also provided with a positive pole and a negative pole.
3. The battery case according to claim 1, wherein the battery case is made of any one of stainless steel, metallic aluminum, brass, and nickel.
4. The battery shell according to claim 1, wherein the phase-change material encapsulated in the cavity of the battery shell is any one of acetone, ethanol and methanol, and the gas-liquid conversion temperature of the phase-change material is 40-80 ℃.
5. The battery case according to claim 1, wherein the thin-walled double-layered cavity comprises an upper wall and a lower wall, the upper wall and the lower wall being connected by a reinforcing structure; the reinforcing structure is a plurality of same cylindrical structures, square column structures or strip structures.
6. The battery case according to claim 1, wherein the outer case is a rectangular parallelepiped case, each side of the rectangular parallelepiped case is a thin-wall double-layer cavity, and each side of the rectangular parallelepiped case is communicated with the thin-wall double-layer cavity; the inner shell is a thin-wall double-layer cavity arranged at the middle part of the battery cell in the power battery, the inner shell is arranged in the outer shell, the inner shell is identical and parallel to one side surface of the outer shell, and the periphery of the inner shell is communicated with the cavity of the outer shell.
7. A battery case according to claim 6, wherein the bottom surface of the battery case is placed on a condensing plate for cooling.
8. The battery case according to claim 1, wherein the outer case is a cylindrical case, the side surfaces, the top surface and the bottom surface of the cylindrical case are all thin-wall double-layer hollow bodies, and the thin-wall double-layer hollow bodies of the side surfaces, the top surface and the bottom surface are communicated; the inner shell is of a vertical rod structure arranged at the middle part of an electric core inside the power battery, the vertical rod structure is a thin-wall double-layer cavity, the inner shell is arranged inside the outer shell, the inner shell is co-tall and parallel to the side face of the outer shell, and the top end and the bottom end of the inner shell are respectively communicated with the top face and the bottom face cavity of the outer shell.
9. A battery housing as claimed in claim 8, wherein the plurality of battery housings are each closely fitted to a cooling condensation plate disposed on a side of the battery housing.
10. A power cell comprising a cell housing according to any one of claims 1-9, wherein a power cell internal cell is disposed in the cell housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322482450.6U CN220873688U (en) | 2023-09-12 | 2023-09-12 | Battery shell and power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322482450.6U CN220873688U (en) | 2023-09-12 | 2023-09-12 | Battery shell and power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220873688U true CN220873688U (en) | 2024-04-30 |
Family
ID=90819905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322482450.6U Active CN220873688U (en) | 2023-09-12 | 2023-09-12 | Battery shell and power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220873688U (en) |
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2023
- 2023-09-12 CN CN202322482450.6U patent/CN220873688U/en active Active
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