Shell of heat absorption assembly, heat absorption assembly, battery assembly and electric device

Abstract

The utility model discloses a heat absorption component shell, heat absorption component, battery pack and electric device, wherein the heat absorption component shell comprises a ventilation piece, an accommodating cavity and an exhaust passage communicated with the accommodating cavity are formed in the shell, the accommodating cavity is suitable for accommodating the heat absorption piece, and the ventilation piece is arranged between the exhaust passage and the heat absorption piece. According to the shell of the heat absorption assembly, directional exhaust of the heat absorption assembly can be achieved, the liquid phase change heat absorption material and the solid phase change heat absorption material can be prevented from being exhausted along with gas in the exhaust process to a certain degree, the heat absorption performance of the heat absorption assembly is improved to a certain degree, and then the use safety of a battery assembly is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially is related to a shell of heat absorption subassembly, heat absorption subassembly, battery assembly and electric device. BACKGROUND

[0002] At present on the market, with the gradual popularization of new energy vehicles, battery assembly has also been widely applied.

[0003] Among them, in the use process of battery assembly, because the use environment of battery assembly is relatively complex, the battery assembly is prone to thermal runaway, therefore, how to carry out thermal safety protection to battery assembly is the problem to be solved at present.

[0004] In the prior art, in order to make battery assembly (such as battery pack) have the ability to avoid or delay thermal runaway, a heat insulation piece such as aerogel is usually arranged in the battery assembly. The heat insulation piece is arranged between the battery monomers to block the heat transfer between the battery monomers. But the heat insulation piece can't effectively prevent heat diffusion, and the heat dissipation capacity of the battery assembly can't meet the heat dissipation demand under thermal runaway. UTILITY MODEL CONTENTS

[0005] The utility model aims at at least solving one of the technical problems existing in the prior art. For this purpose, the first purpose of the utility model is to propose a shell of heat absorption subassembly, which can improve the heat absorption performance of the heat absorption subassembly, so that the temperature of the battery monomer can be effectively reduced by using the heat absorption subassembly, thereby reducing the risk of thermal runaway of the battery assembly, and solving the technical problem of poor heat exchange performance of the heat exchange element in the prior art.

[0006] The second purpose of the utility model is to propose a heat absorption subassembly with the above-mentioned shell.

[0007] The third purpose of the utility model is to propose a battery assembly with the above-mentioned heat absorption subassembly.

[0008] The fourth purpose of the utility model is to propose an electric device with the above-mentioned battery assembly.

[0009] According to the shell of heat absorption subassembly of the utility model embodiment, the shell includes a gas permeable piece, a containing cavity and an exhaust passage communicated with the containing cavity are formed in the shell, the containing cavity is adapted to contain a heat absorption piece, and the gas permeable piece is arranged between the exhaust passage and the heat absorption piece.

[0010] According to the heat absorbing component shell of the embodiment of the utility model, by setting the accommodating cavity accommodating the heat absorbing part and the exhaust passage communicated with the accommodating cavity, when the shell accommodates the heat absorbing part to form the heat absorbing component, in the case that some battery monomers occur thermal runaway, at least part of the heat generated by the thermal runaway can be absorbed by the heat absorbing part, thereby reducing the risk of thermal diffusion of the battery component, improving the use safety of the battery component; the heat absorbing component is often accompanied by gas production in the heat absorbing process, for example, the heat absorbing component includes phase change heat absorbing material, the phase change heat absorbing material is all or partially converted from solid, liquid or gel state to gaseous state, and the gas is discharged from the exhaust passage integrated in the shell interior, which is favorable for the directional delivery of the gas and can avoid the diffusion of the gas in the battery component to a certain extent, thereby preventing the thermal diffusion in the battery component, avoiding the short circuit arc in the battery component, reducing the risk of thermal diffusion of the battery component, improving the safety and reliability of the battery component, meanwhile, by setting the gas permeable part between the exhaust passage and the heat absorbing part, the liquid phase heat absorbing material and the solid phase heat absorbing phase change heat absorbing material are prevented from being discharged with the gas to a certain extent in the exhaust process, so that the heat absorbing performance of the heat absorbing component is improved to a certain extent.

[0011] In some embodiments, the shell comprises: a main body part, the accommodating cavity is formed in the hollow interior of the main body part, an exhaust hole is provided on the outer peripheral wall of the main body part and penetrates the main body part, and the exhaust hole is communicated with the accommodating cavity; and a cover plate, the cover plate is arranged on the outer side of the main body part and covers the exhaust hole, at least part of the cover plate is arranged in a spaced manner with the main body part to form an exhaust passage between the main body part and the cover plate, and the exhaust passage is communicated with the accommodating cavity through the exhaust hole.

[0012] In some embodiments, the gas permeable part is a polytetrafluoroethylene film; and / or the gas permeation amount of the gas permeable part is 1500ml / min-2000ml / min, and the water pressure resistance of the gas permeable part is >60kpa.

[0013] In some embodiments, the gas permeable part is arranged on the side of the main body part facing the cover plate and covers the exhaust hole.

[0014] In some embodiments, the gas permeable part is arranged in the accommodating cavity and located between the exhaust hole and the heat absorbing part.

[0015] In some embodiments, the gas permeable part is arranged in a spaced manner with the outer peripheral wall of the main body part provided with the exhaust hole.

[0016] In some embodiments, the gas permeable part is adapted to be wrapped around the outer periphery of the heat absorbing part.

[0017] In some embodiments, the shell of the heat absorbing component further comprises a support frame, the support frame is arranged in the accommodating cavity and located between the exhaust hole and the heat absorbing part, and the gas permeable part is arranged on the support frame.

[0018] In some embodiments, the support frame is fixedly coupled to the housing by a fixing assembly.

[0019] In some embodiments, the fixing assembly comprises a fixing protrusion and a fixing groove, the fixing protrusion is fixedly coupled in the fixing groove, one of the fixing protrusion and the fixing groove is arranged on the support frame, and the other is arranged on the housing.

[0020] In some embodiments, the housing of the heat-absorbing assembly further comprises a pressing member, and the air-permeable member is pressed in the support frame by the pressing member.

[0021] In some embodiments, the pressing member is a pressing frame, the pressing frame is hollow inside, and the pressing frame is pressed on the air-permeable member and is in interference fit with the support frame.

[0022] In some embodiments, the exhaust hole is arranged on the top wall of the main body, and the cover plate is arranged outside the top wall of the main body.

[0023] In some embodiments, at least part of the top wall of the main body is recessed towards the accommodating cavity to form a recess, at least part of the cover plate covers the recess to form the exhaust passage, and the exhaust hole is arranged on the recess.

[0024] In some embodiments, the top wall of the main body further has a sunken step which is sunken towards the accommodating cavity, and the sunken step is located at the outer periphery of the recess, and the cover plate is mounted on the step surface of the sunken step.

[0025] In some embodiments, the sunken height of the sunken step is greater than or equal to the thickness of the cover plate.

[0026] In some embodiments, at least part of the side wall of the recess is arranged in a spaced manner with the side wall of the main body, the top wall of the main body, the side wall of the main body and the heat-absorbing member form an expansion space, and the exhaust hole is arranged on the side wall of the recess and faces the expansion space.

[0027] In some embodiments, the recess is recessed along the height direction of the housing and extends along the length direction of the housing; and in the thickness direction of the housing, the opposite side walls of the recess are arranged in a spaced manner with the opposite side walls of the main body.

[0028] In some embodiments, in the direction from the bottom wall of the recess to the slot opening of the recess, the opposite side walls of the recess extend in a direction away from each other.

[0029] In some embodiments, the included angle a between the opposite side walls of the recess and the extension plane of the bottom wall of the recess satisfies: 45°≤a≤60°.

[0030] In some embodiments, the heat-absorbing element comprises a phase change heat-absorbing material, and the volume V of the expansion space and the volume V0 of the phase change heat-absorbing material satisfy: 10% ≤ V / V0 ≤ 20%.

[0031] In some embodiments, the housing is an aluminum housing or a steel housing.

[0032] According to an embodiment of the present invention, a heat-absorbing assembly includes: a housing, wherein the housing is the aforementioned housing; and a heat-absorbing element disposed within a receiving cavity of the housing.

[0033] According to the embodiments of the present invention, the heat absorption component, by employing the aforementioned housing, has the advantage of improving the heat absorption performance of the heat absorption component.

[0034] In some embodiments, the heat-absorbing element comprises a phase change heat-absorbing material.

[0035] In some embodiments, the phase change endothermic material includes a hydrogel.

[0036] In some embodiments, the heat-absorbing element further includes a support frame disposed within the receiving cavity, and the phase change heat-absorbing material is connected to the support frame.

[0037] In some embodiments, a honeycomb structure is formed within the support frame, the honeycomb structure has channels, the exhaust channel is located at the top of the housing, the channel of the honeycomb structure extends in a direction parallel to the height or thickness direction of the housing, and at least a portion of the phase change heat-absorbing material is filled within the honeycomb structure.

[0038] In some embodiments, the housing includes a main body and a cover plate, at least a portion of the top wall of the main body is recessed toward the receiving cavity to form a groove, at least a portion of the cover plate covers the groove to form the exhaust passage, and the heat-absorbing element is spaced apart from the bottom wall of the groove.

[0039] In some embodiments, in the height direction of the housing, the minimum distance L1 between the heat-absorbing element and the bottom wall of the groove satisfies the following condition with respect to the height L of the heat-absorbing element: 5% ≤ L1 / L ≤ 30%.

[0040] A battery assembly according to an embodiment of the present invention includes: a battery cell; and a heat-absorbing component, wherein the heat-absorbing component is the aforementioned heat-absorbing component and is disposed on one side of the battery cell.

[0041] According to the battery assembly of the present invention, by employing the aforementioned heat-absorbing component, the risk of heat diffusion in the battery assembly is reduced, thereby improving the safety and reliability of the battery assembly and ensuring its working performance to a certain extent.

[0042] In some embodiments, the battery assembly includes a plurality of battery cells, and the heat-absorbing component is disposed between at least two adjacent battery cells; the heat-absorbing component includes a phase change heat-absorbing material, which is used to undergo a phase change and absorb the heat generated by thermal runaway when at least one of the battery cells undergoes thermal runaway.

[0043] The electrical device according to an embodiment of the present invention includes the aforementioned battery assembly.

[0044] According to the embodiments of the present invention, by employing the aforementioned battery assembly, the electrical device can not only operate normally, but also improve its safety performance.

[0045] Additional aspects and advantages of this invention will become apparent from the description which follows, or may be learned by practice of this invention. Attached Figure Description

[0046] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0047] Figure 1 This is a schematic diagram of the heat-absorbing component of some embodiments of the present invention.

[0048] Figure 2 This is an exploded view of the heat-absorbing components of some embodiments of the present invention.

[0049] Figure 3 This is a cross-sectional view of a heat-absorbing component according to some embodiments of the present invention.

[0050] Figure 4 for Figure 3 A magnified view of a portion of region I in the middle.

[0051] Figure 5 This is an exploded view of a portion of the shell structure according to some embodiments of the present invention.

[0052] Figure 6 for Figure 5 Enlarged view of the middle part of the structure.

[0053] Figure 7 This is an exploded view of a portion of the structure of a heat-absorbing component according to some embodiments of the first aspect of this utility model.

[0054] Figure 8 for Figure 7 A magnified view of a portion of region II.

[0055] Figure 9 for Figure 7 Exploded view of part of the structure.

[0056] Figure 10 A schematic view of the air-permeable member cooperating with the heat-absorbing member for some embodiments of the second aspect of the present application.

[0057] Figure 11 An exploded view of the air-permeable member for some embodiments of the third aspect of the present application. Figure 10

[0058] A partial enlarged view of region III in the exploded view. Figure 12 A schematic view of the air-permeable member cooperating with the support frame for some embodiments of the third aspect of the present application.

[0059] Figure 13 A partial enlarged view of region IV in the exploded view.

[0060] Figure 14 An exploded view of the heat-absorbing assembly for some embodiments of the third aspect of the present application. Figure 13

[0061] A sectional view of the partial structure of the heat-absorbing assembly for some embodiments of the third aspect of the present application. Figure 15 Figure 14 A schematic view of the partial structure of the shell for some embodiments of the third aspect of the present application.

[0062] Figure 16 A partial enlarged view of region IV in the exploded view.

[0063] Figure 17 Figure 16 A sectional view of the partial structure of the heat-absorbing assembly for some embodiments of the third aspect of the present application.

[0064] Figure 18 Reference signs:

[0065] 1000, heat-absorbing assembly;

[0066] 100, shell;

[0067] 110, accommodating cavity; 400, exhaust passage;

[0068] 130, groove;

[0069] 140, sunken step;

[0070] 150, expansion space; 151, first expansion space; 152, second expansion space;

[0071] 160, main body portion; 120, exhaust hole;

[0072] 170, sealing cover;

[0073] 300, cover plate;

[0074] 300, cover plate;

[0075] ​​200, heat-absorbing member; 210, support framework; 220, phase-change heat-absorbing material;

[0076] 500, air-permeable member;

[0077] 600, support frame; 610, assembly groove;

[0078] 700, fixing assembly; 710, fixing protrusion; 720, fixing groove;

[0079] 800, compression member. DETAILED DESCRIPTION

[0080] Embodiments of the present application are described in detail below with reference to the accompanying drawings, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as a limitation of the present application.

[0081] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0082] The housing 100 of the heat-absorbing assembly 1000 of the embodiments of the present application is described below with reference to the drawings of the specification.

[0083] In combination Figure 1 and Figure 2 , the housing 100 of the heat-absorbing assembly 1000 according to the embodiments of the present application includes an air-permeable member 500 (the specific structure of the air-permeable member 500 can be seen from Figure 9 , Figure 11 and Figure 14 ).

[0084] In combination Figure 2 , Figure 3 and Figure 4 , the housing 100 is formed with a containing cavity 110 and an exhaust passage 400, the exhaust passage 400 communicates with the containing cavity 110, the containing cavity 110 is adapted to contain a heat-absorbing member 200, and the air-permeable member 500 is arranged between the exhaust passage 400 and the heat-absorbing member 200.

[0085] It should be noted that by arranging the heat absorption member 200 in the accommodating cavity 110, the heat absorption member 200 is mainly adapted to exchange heat with the battery monomer to absorb the heat of the battery monomer, and the exhaust passage 400 is used to exhaust the gas generated by the heat absorption member 200 out of the shell 100.

[0086] In the present application, "communication" can be communication in a specific case, for example, the exhaust passage 400 communicates with the accommodating cavity 110, and a first explosion-proof valve can be arranged between the exhaust passage 400 and the accommodating cavity 110. The first explosion-proof valve is broken under certain conditions, so that the exhaust passage 400 communicates with the accommodating cavity 110.

[0087] In some embodiments, by absorbing the heat of the battery monomer by the heat absorption member 200, the temperature of the battery monomer is adjusted, so that the temperature of the battery monomer can be maintained within a normal range, thereby avoiding the thermal runaway of the battery monomer to a certain extent, and improving the use safety and performance of the battery assembly. Specifically, when some battery monomers in the battery assembly undergo thermal runaway, the heat generated by at least part of the battery monomers undergoing thermal runaway can be absorbed by the heat absorption member 200, reducing the heat transferred from the battery monomers undergoing thermal runaway to other battery monomers. To a certain extent, it can avoid the thermal runaway of other battery monomers, thereby reducing the risk of thermal diffusion of the whole battery assembly and improving the use safety of the battery assembly.

[0088] It should also be noted that the heat absorption member 200 herein can be made of a phase change heat absorption material 220, such as a hydrogel. The heat absorption member 200 mainly undergoes phase change to absorb a large amount of heat of the battery monomer when the battery monomer undergoes thermal runaway, and does not significantly absorb the heat of the battery monomer when the battery monomer works normally.

[0089] At the same time, by arranging the heat absorption member 200 in the accommodating cavity 110, the heat absorption member 200 is arranged in the shell 100, so as to support and protect the heat absorption member 200 by the shell 100, prolong the service life of the heat absorption member 200, and improve the position stability of the heat absorption member 200, thereby ensuring the heat absorption performance of the heat absorption member 200 to a certain extent.

[0090] That is, by arranging the accommodating cavity 110 in the shell 100, the accommodating cavity 110 is mainly used to accommodate the heat absorption member 200, so that the heat absorption member 200 can be arranged in the shell 100.

[0091] In some embodiments, in combination with Figure 1 and Figure 2 As shown, the accommodating cavity 110 is hollow in the interior of the shell 100, so as to reduce the forming difficulty of the accommodating cavity 110.

[0092] Further, by arranging the exhaust passage 400 in communication with the accommodating cavity 110, the exhaust passage 400 and the heat absorption member 200 are in cooperative communication, so that the gas generated by the heat absorption member 200 can be discharged by using the exhaust passage 400, the directional exhaust of the heat absorption member 200 can be realized, the gas pressure and temperature of the heat absorption member 200 can be avoided to a certain extent, the service life of the heat absorption member 200 can be prolonged, and the heat absorption performance of the heat absorption member 200 can be improved, so that the heat absorption performance of the heat absorption assembly 1000 is improved, the risk of heat diffusion of the battery assembly can be effectively reduced by using the heat absorption assembly 1000, and the safety and reliability of the battery assembly are improved. Specifically, the heat absorption assembly 1000 is often accompanied by gas generation during the heat absorption process. For example, the heat absorption assembly 1000 includes a phase change heat absorption material 220, the phase change heat absorption material 220 is all or partially converted from a solid state, a liquid state or a gel state to a gaseous state, and the gas is discharged from the exhaust passage 400 integrated in the inside of the shell 100 to the outside of the shell 100. The gas or the liquid condensed from the gas can be discharged directionally, which can avoid the gas or the liquid condensed from the gas from diffusing in the battery assembly to a certain extent, so as to prevent heat diffusion in the battery assembly, avoid short circuit arc in the battery assembly, and improve the safety and reliability of the battery assembly.

[0093] In some embodiments, the exhaust passage 400 communicates with the external space of the battery assembly, so as to realize direct discharge of the gas generated by the heat absorption member 200 to the outside of the battery assembly, and reduce the risk of heat diffusion of the battery assembly.

[0094] It is worth noting that the exhaust passage 400 is arranged in the shell 100 in the present application, so that when the gas is generated during the heat absorption process of the heat absorption member 200, the gas can be discharged through the exhaust passage 400 integrated in the inside of the shell 100, which can avoid the gas from being directly discharged to the outside of the heat absorption assembly 1000 to a certain extent. In this way, the gas can be avoided to diffuse in the battery assembly to a certain extent, so as to prevent heat diffusion in the battery assembly, reduce the risk of heat diffusion of the battery assembly, and maximize the safety and reliability of the battery assembly.

[0095] In a specific example, when the battery monomer adjacent to the shell 100 of the heat absorption assembly 1000 occurs thermal runaway, heat is transferred to the heat absorption member 200, the heat absorption member 200 rapidly absorbs heat to absorb the heat of the battery monomer, so as to reduce the risk of heat diffusion of the battery monomer, improve the use safety of the battery assembly, and generate gas during the heat absorption process of the heat absorption member 200. The gas is discharged from the exhaust passage 400 integrated in the inside of the shell 100, which can avoid the gas from diffusing in the battery assembly to a certain extent, so as to prevent heat diffusion in the battery assembly, reduce the risk of heat diffusion of the battery assembly, and maximize the safety and reliability of the battery assembly.

[0096] In some embodiments, the heat absorption assembly 1000 is arranged adjacent to the battery cell, so that the heat absorption member 200 is arranged adjacent to the battery cell, thereby facilitating the absorption of heat of the battery cell by the heat absorption member 200.

[0097] In some embodiments, the heat absorption member 200 comprises a phase change heat absorption material 220 (the specific structure of the phase change heat absorption material 220 can be found in Figure 11 ), which is used for heat exchange with the battery cell, so as to absorb the heat of the battery cell, so that the temperature of the battery cell can be maintained within a suitable temperature range, to a certain extent, reduce the risk of thermal diffusion of the battery cell, and improve the use safety of the battery cell.

[0098] In some embodiments, the heat absorption member 200 is arranged adjacent to the battery cell, and the phase change heat absorption material 220 can be all or partially converted from solid, liquid or gel state to gaseous state at a certain temperature, and absorbs the heat of the battery cell transferred to the phase change heat absorption material 220 during the phase change, so as to absorb the heat of the battery cell, so that the temperature of the battery cell can be maintained within a suitable temperature range.

[0099] In a specific example, the phase change heat absorption material 220 can be in solid, liquid or gel state, and the phase change heat absorption material 220 can undergo phase change from solid to liquid, from liquid to gas, or from solid to gas, and during the phase change, the phase change heat absorption material 220 absorbs and carries away the heat released by the battery cell through its latent heat of phase change, so as to achieve the purpose of absorbing the heat of the battery cell, so that the temperature of the battery cell can be within a normal temperature range.

[0100] It should be noted that the phase change heat absorption material 220 mentioned here is a material with high gasification latent heat and strong heat absorption capacity, such as one or more of paraffin, hydrogel, metal, fatty acid, and crystalline hydrate. In an embodiment of the present application, the heat absorption material is a solid or liquid phase change material, such as paraffin, water, ethanol, isopropyl alcohol, n-heptane, inorganic salt solution, etc. In another embodiment of the present application, the heat absorption material is at least one of hydrogel, hydrated salt, and colloid, for example, the heat absorption material includes one or more of polyacrylamide hydrogel, sodium polyacrylate hydrogel, polyvinyl alcohol hydrogel, poly(N-isopropyl acrylamide) hydrogel, calcium chloride hexahydrate, sodium sulfate decahydrate, potassium nitrate trihydrate, silica sol, and gelatin colloid. Because the above-mentioned materials include a matrix and a phase change material, the matrix is used to bind the phase change material to form a solid or gel state. The phase change material is one or more of water, ethanol, isopropyl alcohol, n-heptane, and inorganic salt solution.

[0101] In some embodiments, the phase change heat absorption material 220 comprises a hydrogel. To a certain extent, the working performance of the phase change heat absorption material 220 is ensured.

[0102] In summary, the heat absorption member 200 is provided with the phase change heat absorption material 220, the heat generated by the battery cell during operation is absorbed through the phase change of the phase change heat absorption material 220, the temperature of the battery cell is controlled within a normal range, the thermal runaway of the battery cell is avoided to a certain extent, and the use safety and performance of the battery assembly are improved.

[0103] It is also worth noting that the shell 100 of the present application is provided with the air permeable member 500, and the air permeable member 500 is arranged between the exhaust passage 400 and the heat absorption member 200 (for specific structure of the air permeable member 500, please refer to Figure 9 、 Figure 11 and Figure 14 ). The air permeable member 500 can enable the gas between the exhaust passage 400 and the heat absorption member 200 to be communicated with each other, and can also block the flow of the liquid phase phase change heat absorption material and the solid phase phase change heat absorption material to the exhaust passage 400 to a certain extent, thereby avoiding the liquid phase phase change heat absorption material and the solid phase phase change heat absorption material flowing out through the exhaust passage 400, so as to block the liquid phase phase change heat absorption material and the solid phase phase change heat absorption material in the accommodation cavity 110, which is beneficial to improve the heat absorption capacity and heat absorption effect of the heat absorption member 200, so as to ensure that the battery cell can be at a healthy working temperature to a certain extent.

[0104] Here, the air permeable member 500 can be a microporous polymer film, and the principle is mainly to realize the air permeation function through micropores. The size of these micropores is very fine, and only gas molecules are allowed to pass through, while liquid and solid particles are difficult to penetrate, so as to realize the exhaust through the air permeable member 500, and block the flow of the liquid phase phase change heat absorption material and the solid phase phase change heat absorption material to the exhaust passage 400, thereby improving the heat absorption capacity and heat absorption effect of the heat absorption member 200.

[0105] In some embodiments, the air permeable member 500 is a polytetrafluoroethylene film (also known as Teflon film); and / or the air permeation amount of the air permeable member 500 is 1500ml / min-2000ml / min, and the water pressure resistance of the air permeable member 500 is >60kpa, which to a certain extent guarantees the performance of the air permeable member 500. The air permeation amount is tested according to GB / T 1038.1-2022 “Plastic products Film and sheet gas permeability test method Part 1: differential pressure method”; and the water pressure resistance test is carried out according to GB / T 4744-2013 “Textiles Detection and evaluation of water resistance Static water pressure method”.

[0106] It can be understood that, compared with the prior art, the shell 100 of the heat absorption assembly 1000 of the present application not only facilitates the absorption of the heat of the battery monomer by the heat absorption piece 200, but also can direct the gas generated by the heat absorption piece 200 in the heat absorption process to be discharged, and can prevent the liquid phase phase change heat absorption material and the solid phase phase change heat absorption material from being discharged to the exhaust passage 400 with the gas in the exhaust process, so as to realize the sealing of the liquid phase phase change heat absorption material and the solid phase phase change heat absorption material in the containing cavity 110, and facilitate the improvement of the heat absorption capacity and the heat absorption effect of the heat absorption piece 200, so as to ensure that the battery monomer can be in a healthy working temperature to a certain extent.

[0107] At the same time, by setting the exhaust passage 400 in the shell 100 and setting the exhaust passage 400 to communicate with the containing cavity 110, the exhaust passage 400 and the heat absorption piece 200 are cooperatively communicated, so that the gas generated by the heat absorption piece 200 in the heat absorption process can be directed to be discharged by the exhaust passage 400, which can avoid the gas pressure and temperature of the heat absorption piece 200 from being too high to a certain extent, and is beneficial to prolong the service life of the heat absorption piece 200 and improve the heat absorption performance of the heat absorption piece 200, thereby improving the heat absorption performance of the heat absorption assembly 1000, and on the other hand, the gas can also be prevented from being directly discharged to the outside of the heat absorption assembly 1000, which can avoid the gas from diffusing in the battery assembly to a certain extent, thereby preventing the heat diffusion from occurring in the battery assembly, effectively reducing the risk of heat diffusion of the battery assembly, and improving the safety and reliability of the battery assembly.

[0108] In addition, by setting the gas permeable piece 500 between the exhaust passage 400 and the heat absorption piece 200, the gas generated by the heat absorption piece 200 can be smoothly discharged by the exhaust passage 400, and at the same time, the liquid phase phase change heat absorption material and the solid phase phase change heat absorption material can be blocked from flowing to the exhaust passage 400 to a certain extent, thereby realizing the sealing of the liquid phase phase change heat absorption material and the solid phase phase change heat absorption material in the containing cavity 110, and facilitating the improvement of the heat absorption capacity and the heat absorption effect of the heat absorption piece 200, so as to ensure that the battery monomer can be in a healthy working temperature to a certain extent.

[0109] It can be understood that, compared with the prior art, the shell 100 of the heat absorption assembly 1000 of the present application not only facilitates the absorption of the heat of the battery monomer by the heat absorption piece 200, but also can direct the gas generated by the heat absorption piece 200 in the heat absorption process to be discharged, and can prevent the liquid phase phase change heat absorption material and the solid phase phase change heat absorption material from being discharged to the exhaust passage 400 with the gas in the exhaust process, so as to realize the sealing of the liquid phase phase change heat absorption material and the solid phase phase change heat absorption material in the containing cavity 110, and facilitate the improvement of the heat absorption capacity and the heat absorption effect of the heat absorption piece 200, so as to ensure that the battery monomer can be in a healthy working temperature to a certain extent.

[0110] In some embodiments, in combination with Figure 2 , Figure 3 and Figure 4As shown, the exhaust passage 400 is arranged at the top of the shell 100. The gas generated by the heat absorption member 200 during the heat absorption process generally moves upward, and the solid and liquid move downward. By arranging the exhaust passage 400 at the top of the shell 100, on the one hand, the gas generated by the heat absorption member 200 during the heat absorption process can be discharged through the exhaust passage 400, and on the other hand, the solid and liquid phase change heat absorption materials can be prevented from being discharged through the exhaust passage 400 to some extent, which is beneficial to ensure the heat absorption performance of the heat absorption member 200.

[0111] In some embodiments, in combination with Figure 2 、 Figure 5 and Figure 6 As shown, the shell 100 includes a main body 160 and a cover plate 300. The main body 160 is internally hollow to form a containing cavity 110. The outer peripheral wall of the main body 160 is provided with an exhaust hole 120 penetrating therethrough, and the exhaust hole 120 is communicated with the containing cavity 110. By internally hollowing the main body 160 to form the containing cavity 110, the forming difficulty of the containing cavity 110 can be reduced. By providing the exhaust hole 120 penetrating through the outer peripheral wall of the main body 160 and setting the exhaust hole 120 to be communicated with the containing cavity 110, the communication difficulty between the containing cavity 110 and the outside space can be reduced, which is beneficial to reduce the communication difficulty between the containing cavity 110 and the exhaust passage 400, and facilitate the discharge of the gas generated by the heat absorption member 200 during the heat absorption process through the exhaust passage 400.

[0112] Optionally, in combination with Figure 3 、 Figure 5 and Figure 6 As shown, the cover plate 300 is arranged outside the main body 160 and covers the exhaust hole 120. At least part of the cover plate 300 is arranged in a spaced manner with the main body 160 to form an exhaust passage 400 between the main body 160 and the cover plate 300, and the exhaust passage 400 is communicated with the containing cavity 110 through the exhaust hole 120. Here, when the cover plate 300 is arranged outside the main body 160, at least part of the cover plate 300 is arranged in a spaced manner with the main body 160 to form the exhaust passage 400 between the shell 100 and the main body 160, thereby forming the exhaust passage 400 in the shell 100 and reducing the forming difficulty of the exhaust passage 400.

[0113] In addition, the cover plate 300 covers the exhaust hole 120, so that when the exhaust passage 400 is formed between the main body part 160 and the cover plate 300, the exhaust passage 400 and the accommodating cavity 110 are in cooperative communication through the exhaust hole 120, the difficulty of cooperative communication between the exhaust passage 400 and the accommodating cavity 110 is reduced, and then the exhaust passage 400 is in cooperative communication with the heat absorption member 200, which facilitates the exhaust of the gas generated by the heat absorption member 200 through the exhaust passage 400, thereby realizing the directional exhaust of the heat absorption member 200, avoiding the excessively high gas pressure and temperature of the heat absorption member 200 to a certain extent, and being beneficial to prolong the service life of the heat absorption member 200 and improve the heat absorption performance of the heat absorption member 200, thereby improving the heat absorption performance of the heat absorption assembly 1000, so that the heat absorption assembly 1000 can effectively reduce the risk of heat diffusion of the battery assembly and improve the safety and reliability of the battery assembly.

[0114] In some embodiments, as shown in Figure 3 , Figure 5 and Figure 6 , the top wall of the main body part 160 is provided with an exhaust hole 120 penetrating through it, and the cover plate 300 is arranged outside the top wall of the main body part 160 and covers the exhaust hole 120. That is, the exhaust hole 120 is arranged on the top wall of the main body part 160, and the cover plate 300 is arranged outside the top wall of the main body part 160, so that when the exhaust passage 400 is formed between the main body part 160 and the cover plate 300, the exhaust passage 400 can also be arranged at the top of the shell 100, which is beneficial to exhaust the gas generated by the heat absorption member 200 during the heat absorption process through the exhaust passage 400, and to a certain extent, avoid the solid phase change heat absorption material and the liquid phase change heat absorption material from being exhausted through the exhaust passage 400, and is beneficial to guarantee the heat absorption performance of the heat absorption member 200. The top wall is arranged at the top of the main body part 160 and is used to enclose the accommodating cavity 110 with the side wall and the bottom wall of the main body part 160.

[0115] In this application, the expressions related to height, top, top wall, side wall, and bottom wall can be understood as the direction or position of each structure in the actual application scene (such as when installed on a vehicle).

[0116] In some embodiments, as shown in Figure 2 , Figure 5 and Figure 6 , the shell 100 is formed as a cuboid, the size of the shell 100 in the length direction is greater than the size of the shell 100 in the height direction and in the thickness direction; the exhaust passage 400 extends along the length direction of the shell 100, and the exhaust hole 120 includes a plurality of exhaust holes 120 which are arranged at intervals along the extension direction of the exhaust passage 400. In this way, the exhaust passage 400 can be in communication with the accommodating cavity 110 through the plurality of exhaust holes 120, the communication area between the exhaust passage 400 and the accommodating cavity 110 is increased, and the exhaust effect is improved.

[0117] Meanwhile, since the plurality of exhaust holes 120 are arranged at intervals along the extension direction of the exhaust passage 400, the plurality of exhaust holes 120 can also be arranged at intervals along the length direction of the heat absorption member 200, so that the plurality of exhaust holes 120 can be used to exhaust the different positions of the heat absorption member 200, which is beneficial to improve the uniformity of the exhaust of the plurality of positions of the heat absorption member 200, and thus the gas generated by the heat absorption member 200 during the heat absorption process can be effectively exhausted, the exhaust effect is improved, and thus the heat absorption effect of the heat absorption member 200 is improved.

[0118] In addition, by arranging the exhaust passage 400, the plurality of exhaust holes 120 can be arranged to exhaust in the same direction, which can improve the exhaust effect and reduce the difficulty of exhaust.

[0119] It should be noted that the length direction of the shell 100 mentioned above can be understood as the X direction shown in Figure 1 and Figure 2 , the Y direction shown in Figure 1 and Figure 2 can be understood as the thickness direction of the shell 100, and the Z direction shown in Figure 1 and Figure 2 can be understood as the height direction of the shell 100.

[0120] In some embodiments, as shown in Figure 7 , Figure 8 and Figure 9 , the air permeable member 500 is arranged on the side of the main body portion 160 facing the cover plate 300 and covers the exhaust hole 120. Since the exhaust hole 120 is arranged between the exhaust passage 400 and the heat absorption member 200, by the above arrangement, the air permeable member 500 can be arranged between the exhaust passage 400 and the heat absorption member 200, so as to block the flow of liquid phase phase change heat absorption material and solid phase phase change heat absorption material to the exhaust passage 400 by using the air permeable member 500, thereby improving the heat absorption capacity and heat absorption effect of the heat absorption member 200.

[0121] Meanwhile, by arranging the air permeable member 500 on the side of the main body portion 160 facing the cover plate 300, the assembly difficulty of the air permeable member 500 can be reduced, and the main body portion 160 can be used to support the air permeable member 500, thereby improving the position stability of the air permeable member 500 and ensuring the performance of the air permeable member 500 to a certain extent.

[0122] In some embodiments, the air permeable member 500 is arranged on the side of the main body portion 160 facing the cover plate 300 and is fixedly connected to the main body portion 160, so as to further improve the position stability of the air permeable member 500.

[0123] It should be noted that the fixed connection between the air permeable member 500 and the main body portion 160 can be adhesive connection, or the air permeable member 500 is attached to the side of the main body portion 160 facing the cover plate 300 by hot pressing.

[0124] Of course, in some embodiments, the vent 500 may also be located on the side of the main body 160 away from the cover plate 300 and cover the exhaust hole 120, so that the vent 500 can be located between the exhaust channel 400 and the heat absorption member 200.

[0125] In some embodiments, the vent 500 is disposed within the receiving cavity 110 and located between the exhaust port 120 and the heat absorber 200. That is, it is not limited to disposing of the vent 500 on the side of the main body 160 facing the cover plate 300 and covering the exhaust port 120; the vent 500 can also be disposed within the receiving cavity 110 and located between the exhaust port 120 and the heat absorber 200. This also allows the vent 500 to be disposed between the exhaust channel 400 and the heat absorber 200, thereby using the vent 500 to block the flow of liquid phase change heat absorber material and solid phase change heat absorber material to the exhaust channel 400, thus improving the heat absorption capacity and heat absorption effect of the heat absorber 200.

[0126] Meanwhile, by placing the vent 500 in the receiving cavity 110, the housing 100 can protect the vent 500 and extend its service life.

[0127] In some embodiments, the vent 500 is spaced apart from the outer peripheral wall of the main body 160 with the vent hole 120. This allows a certain space to be formed between the vent 500 and the outer peripheral wall of the main body 160 with the vent hole 120. This space can be used to separate the gas-liquid phase change heat-absorbing material and the gas-solid phase change heat-absorbing material, and also to provide space for the heat-absorbing material 200 to expand, thereby ensuring the heat absorption performance of the heat-absorbing material 200 to a certain extent.

[0128] In some embodiments, combined with Figure 10 and Figure 11 As shown, the vent 500 is suitable for wrapping around the outer periphery of the heat absorber 200. Since the heat absorber 200 is located inside the receiving cavity 110, by wrapping the vent 500 around the outer periphery of the heat absorber 200, the vent 500 can be placed inside the receiving cavity 110, and the vent 500 can be located between the exhaust port 120 and the heat absorber 200. In this way, while placing the vent 500 between the exhaust channel 400 and the heat absorber 200, the assembly difficulty of the vent 500 can also be reduced, so that the vent 500 can block the flow of liquid phase change heat absorber material and solid phase change heat absorber material to the exhaust channel 400, thereby improving the heat absorption capacity and heat absorption effect of the heat absorber 200.

[0129] In some embodiments, the air permeable member 500 is an elastic member, so that the air permeable member 500 has elastic deformation capability and certain pressure bearing capability, so that the air permeable member 500 can effectively bear the volume expansion of the phase change heat absorption material 220 after phase change, and to some extent, ensure the heat absorption performance of the phase change heat absorption material 220.

[0130] In some embodiments, in combination with Figure 12-18 As shown in the drawings, the heat absorption assembly 1000 further comprises a support frame 600, which is arranged in the accommodating cavity 110 and located between the exhaust hole 120 and the heat absorption member 200, and the air permeable member 500 is arranged in the support frame 600. It can be understood here that when the air permeable member 500 is arranged in the accommodating cavity 110, it is not limited to wrapping the air permeable member 500 around the outer periphery of the heat absorption member 200, but the support frame 600 can also be arranged in the accommodating cavity 110 and arranged between the exhaust hole 120 and the heat absorption member 200, so that the air permeable member 500 arranged in the support frame 600 can be arranged between the exhaust passage 400 and the heat absorption member 200, reducing the assembly difficulty of the air permeable member 500.

[0131] At the same time, by arranging the air permeable member 500 in the support frame 600, the support frame 600 can also be used to support the air permeable member 500, reducing the fixing difficulty of the air permeable member 500 and improving the position stability of the air permeable member 500, to some extent, ensuring the performance of the air permeable member 500.

[0132] In some embodiments, in combination with Figure 13 、 Figure 14 and Figure 15 As shown in the drawings, the support frame 600 is hollow inside to form a support frame, and the air permeable member 500 is arranged in the support frame. In addition to arranging the air permeable member 500 in the support frame 600, the assembly difficulty of the support frame 600 and the air permeable member 500 can also be reduced.

[0133] In some embodiments, the support frame 600 is fixedly connected with the shell 100 through a fixing assembly 700. Here, the support frame 600 is arranged in the accommodating cavity 110 and fixedly connected with the shell 100 through the fixing assembly 700, so as to realize the fixed connection between the support frame 600 and the shell 100, thereby facilitating the support of the support frame 600 by the shell 100, improving the position stability of the support frame 600, and thus improving the position stability of the air permeable member 500, and being beneficial to improving the performance of the air permeable member 500.

[0134] At the same time, by using the fixing assembly 700 to fixedly connect the support frame 600 with the shell 100, the fixing difficulty of the support frame 600 and the shell 100 can also be reduced, the assembly efficiency of the support frame 600 can be improved, and thus the assembly difficulty of the air permeable member 500 can be reduced and the assembly efficiency can be improved.

[0135] In some embodiments, in combination withFigure 14-18 As shown in the figures, the fixing assembly 700 comprises a fixing protrusion 710 and a fixing groove 720, the fixing protrusion 710 is fixedly fitted in the fixing groove 720, one of the fixing protrusion 710 and the fixing groove 720 is arranged on the support frame 600, and the other is arranged on the shell 100. In this way, when the fixing protrusion 710 is fixedly fitted in the fixing groove 720, the fixed fitting of the support frame 600 and the shell 100 can be achieved, and the difficulty of fixing the support frame 600 and the shell 100 is reduced.

[0136] In some embodiments, in combination with Figure 14 , Figure 15 , Figure 16 and Figure 17 As shown in the figures, the fixing groove 720 is arranged on the support frame 600, and the fixing protrusion 710 is arranged on the shell 100. The fixing protrusion 710 is fixedly fitted in the fixing groove 720 to achieve the fixed fitting of the support frame 600 and the shell 100.

[0137] Of course, in other embodiments, the fixing groove 720 can also be arranged on the shell 100, and the fixing protrusion 710 is arranged on the support frame 600 (not shown in the example figure). In this way, when the fixing protrusion 710 is fixedly fitted in the fixing groove 720, the fixed fitting of the support frame 600 and the shell 100 can also be achieved.

[0138] In a specific example, in combination with Figure 16 , Figure 17 and Figure 18 As shown in the figures, the fixing protrusions 710 are arranged on the opposite two side walls of the shell 100, and the fixing grooves 720 are arranged on the opposite two side walls of the support frame 600, respectively. The plurality of fixing protrusions 710 and the plurality of fixing grooves 720 are fitted. Not only can the fixed fitting of the support frame 600 and the shell 100 be achieved, but also the connection strength of the support frame 600 and the shell 100 can be increased, so that the support frame 600 can be stably arranged in the shell 100, thereby improving the positional stability of the support frame 600.

[0139] In some embodiments, in combination with Figure 13 , Figure 14 and Figure 15 As shown in the figures, the heat-absorbing assembly 1000 further comprises a pressing member 800, and the air-permeable member 500 is pressed in the support frame 600 by the pressing member 800. In this way, the connection strength of the air-permeable member 500 and the support frame 600 is increased, so that the air-permeable member 500 can be stably arranged in the support frame 600, thereby improving the positional stability of the air-permeable member 500.

[0140] In some embodiments, in combination with Figure 13 , Figure 14 and Figure 15As shown, the pressing member 800 is a pressing frame, the pressing frame is hollow inside, and the pressing frame is pressed on the air permeable member 500 and is in interference fit with the support frame 600. In this way, the air permeable member 500 is pressed in the support frame 600 by the pressing member 800, the position stability of the air permeable member 500 is improved, and the connection strength of the air permeable member 500 and the support frame 600 is reduced.

[0141] At the same time, by setting the pressing member 800 as a pressing frame, the pressing member 800 can also avoid the air permeable member 500, so as to avoid the pressing member 800 from hindering the air exhaust of the air permeable member 500 to a certain extent, and the performance of the air permeable member 500 is improved.

[0142] In some embodiments, in combination with Figure 14 and Figure 15 As shown, the inner circumferential wall of the support frame 600 is provided with an assembly groove 610, the assembly groove 610 extends along the circumference of the support frame 600, and the outer circumferential wall of the air permeable member 500 is assembled in the assembly groove 610, so as to realize the assembly of the air permeable member 500 into the support frame 600, reduce the assembly difficulty of the air permeable member 500, and also improve the matching strength of the air permeable member 500 and the support frame 600, and improve the position stability of the air permeable member 500.

[0143] In some embodiments, the pressing member 800 is pressed above the air permeable member 500, and at least part of the pressing member 800 is arranged in the assembly groove 610, so as to realize the interference fit of the pressing member 800 and the support frame 600, improve the connection strength of the pressing member 800 and the support frame 600, and then the air permeable member 500 can be pressed into the support frame 600 by the pressing member 800, and the position stability of the air permeable member 500 is improved.

[0144] Among them, the pressing member 800 can be formed as a plastic member or a metal member (aluminum alloy member). In order to ensure the structural strength of the pressing member 800 to a certain extent, and improve the pressing effect of the pressing member 800.

[0145] In some embodiments, in combination with Figure 3 , Figure 4 and Figure 6 As shown, the top wall of at least part of the main body 160 is recessed to form a groove 130 towards the containing cavity 110, at least part of the cover plate 300 covers the groove 130 to form an exhaust passage 400, and the exhaust hole 120 is arranged in the groove 130. That is, the top wall of the main body 160 is provided with a groove 130, and during the assembly of the cover plate 300, the cover plate 300 is arranged outside the top wall of the main body 160, and at least part of the cover plate 300 covers the groove 130 to form the exhaust passage 400, which reduces the forming difficulty of the exhaust passage 400, and further reduces the exhaust difficulty of the heat absorption member 200, which is conducive to improving the heat absorption performance of the heat absorption member 200.

[0146] Meanwhile, by arranging the exhaust hole 120 on the groove 130, the exhaust hole 120 can be arranged on the top wall of the main body part 160, and the exhaust hole 120 can be in cooperative communication with the exhaust passage 400, which reduces the difficulty of connecting the exhaust hole 120 with the exhaust passage 400, and the exhaust passage 400 can be connected to the containing cavity 110 through the exhaust hole 120, so that the gas generated by the heat absorption member 200 can be discharged through the exhaust passage 400, and the directional exhaust of the heat absorption member 200 can be realized.

[0147] Of course, in other embodiments, a protruding part (not shown in the example) protruding away from the top wall of the main body part 160 can be arranged on the cover plate 300, so that when the cover plate 300 is arranged outside the top wall of the main body part 160, the exhaust passage 400 can be formed between the main body part 160 and the cover plate 300, which reduces the difficulty of forming the exhaust passage 400.

[0148] In some embodiments, as shown in Figure 4 , Figure 5 and Figure 6 , the top wall of the main body part 160 also has a sunken step 140 sunken towards the containing cavity 110, and the sunken step 140 is located outside the groove 130, and the cover plate 300 is installed on the step surface of the sunken step 140. This can realize the installation of the cover plate 300 on the main body part 160, and reduces the assembly difficulty of the cover plate 300 and the main body part 160.

[0149] Meanwhile, by arranging the sunken step 140 outside the groove 130, at least part of the cover plate 300 can cover the groove 130 when the cover plate 300 is installed on the sunken step 140, so as to form the exhaust passage 400, and further reduce the difficulty of forming the exhaust passage 400.

[0150] It should be noted that when the cover plate 300 is installed on the sunken step 140, the cover plate 300 can be fixedly connected with the main body part 160 by welding (laser welding or argon arc welding), bonding or other methods, which is not limited here.

[0151] It should be further noted that the sunken step 140 located outside the groove 130 does not necessarily completely surround the outside of the groove 130, but can only surround part of the outside of the groove 130. In the embodiments shown in Figure 4 , Figure 5 and Figure 6 , the sunken step 140 is located on both sides of the groove 130 in the thickness direction of the shell 100.

[0152] The sinking step 140 can be formed by bending the top wall of the main body part 160 towards the accommodating cavity 110, and the part of the top wall that is not bent is referred to as a base part. The part of the top wall that is bent and parallel to the base part can serve as the sinking step 140. The surface of the sinking step 140 that faces away from the accommodating cavity 110 is referred to as a step surface of the sinking step 140. The height between the surface of the base part that faces away from the accommodating cavity 110 and the step surface is referred to as a sinking height of the sinking step 140. The sinking height and the thickness of the cover plate 300 are designed such that, after the cover plate 300 is installed on the step surface of the sinking step 140, the cover plate 300 can be higher than the base part, lower than the base part, or flush with the base part.

[0153] In some embodiments, the sinking height of the sinking step 140 is greater than or equal to the thickness of the cover plate 300. In this way, when the cover plate 300 is installed on the sinking step 140, the upper surface of the cover plate 300 can not protrude out of the main body part 160 to a certain extent, which facilitates subsequent assembly of the heat absorption assembly 1000. In a specific example, the sinking height of the sinking step 140 is equal to the thickness of the cover plate 300.

[0154] In some embodiments, in combination with Figure 5 and Figure 6 As shown in FIGS. 13 and 14, the groove 130 is recessed along the height direction of the shell 100 and extends along the length direction of the shell 100. In this way, the exhaust passage 400 is formed to extend along the length direction of the shell 100, which is conducive to increasing the extension length of the exhaust passage 400 and facilitating improvement of the exhaust performance of the exhaust passage 400.

[0155] In a specific example, in combination with Figure 5 and Figure 6 As shown in FIGS. 13 and 14, the groove 130 is recessed along the height direction of the shell 100 and extends along the length direction of the shell 100. In this way, the exhaust passage 400 is formed to extend along the length direction of the shell 100, which is conducive to increasing the extension length of the exhaust passage 400 and facilitating improvement of the exhaust performance of the exhaust passage 400.

[0156] It should be noted that the shell 100 can be a cuboid or a cylinder. When the shell 100 is formed as a cylinder, the height direction of the shell 100 can be understood as the axial direction of the cylinder, the length direction of the shell 100 and the thickness direction of the shell 100 can be understood as the radial direction of the cylinder, and the length direction of the shell 100 is perpendicular to the thickness direction of the shell 100.

[0157] In some embodiments, the side walls of the recess 130 are at least partially spaced apart from the side walls of the main body portion 160, and the top wall of the main body portion 160, the side walls of the main body portion 160, and the heat absorption member 200 form the expansion space 150. It should be noted that the top wall of the main body portion 160 herein includes the two side walls of the recess 130 and the bottom wall of the recess 130. By providing the expansion space 150, on one hand, the heat absorption member 200 can realize gas-liquid and gas-solid separation when absorbing heat, and to some extent, the heat absorption effect of the heat absorption member 200 is ensured. On the other hand, the heat absorption member 200 is also provided with a space for expansion, so that the phase change heat absorption material 220 can effectively expand in volume after phase change, and to some extent, the heat absorption effect of the heat absorption member 200 is further ensured.

[0158] In some embodiments, as shown in Figure 3 、 Figure 4 and Figure 5 , the recess 130 is recessed along the height direction of the shell 100 and extends along the length direction of the shell 100. In the thickness direction of the shell 100, the opposite two side walls of the recess 130 are respectively spaced apart from the opposite two side walls of the main body portion 160, and the top wall of the main body portion 160, the side walls of the main body portion 160, and the heat absorption member 200 form the expansion space 150. In this way, the distribution rationality of the expansion space 150 can be improved, the efficiency of the heat absorption member 200 in realizing gas-liquid and gas-solid separation when absorbing heat can be improved, and the heat absorption effect of the heat absorption member 200 is further ensured.

[0159] At the same time, the expansion space 150 can also be formed as a buffer space to buffer the phase change heat absorption material 220 that has not been gasified, to some extent, avoiding the phase change heat absorption material 220 that has not been gasified from being discharged from the exhaust hole 120 to the exhaust passage 400, and improving the heat absorption amount of the heat absorption assembly 1000.

[0160] In some embodiments, the exhaust hole 120 is arranged on the side wall of the recess 130 and is arranged opposite to the expansion space 150. In this way, when the heat absorption member 200 absorbs heat and realizes gas-liquid and gas-solid separation in the expansion space 150, the gas can be discharged to the exhaust passage 400 through the exhaust hole 120, and the difficulty of discharging the gas is reduced.

[0161] It should be noted that, compared with arranging the exhaust hole 120 on the bottom wall of the recess 130, arranging the exhaust hole 120 on the side wall of the recess 130 can to some extent avoid the heat absorption member 200 from blocking the exhaust hole 120 when absorbing heat and expanding, and improve the exhaust effect of the exhaust hole 120.

[0162] In some embodiments, as shown in Figure 4As shown, in the direction from the bottom wall of the groove 130 to the opening of the groove 130, the opposite two side walls of the groove 130 extend in the direction away from each other, and the exhaust hole 120 is arranged on the side wall of the groove 130 and faces the expansion space 150 (for the specific arrangement position of the exhaust hole 120, please refer to Figure 5 ). On the one hand, it is beneficial to ensure the opening size of the opening of the groove 130, reduce the forming difficulty of the groove 130, and on the other hand, it can also ensure the space size of the expansion space 150, ensure that the gas and the liquid can be separated in the expansion space 150, so that the gas can be smoothly discharged, and the exhaust effect of the shell 100 is ensured to a certain extent.

[0163] In some embodiments, as shown in Figure 4 , the included angle a between the opposite two side walls of the groove 130 and the extension plane of the bottom wall of the groove 130 satisfies: 45°≤a≤60°. When the included angle a is less than 45°, it is not conducive to ensure the space size of the expansion space 150, and increases the difficulty of separation of the gas and the liquid; when the included angle a is greater than 60°, it is not conducive to the discharge of the gas from the exhaust hole 120. It should be noted that the included angle a between the opposite two side walls of the groove 130 and the extension plane of the bottom wall of the groove 130 can be the same or different.

[0164] Based on this, the included angle a between the opposite two side walls of the groove 130 and the extension plane of the bottom wall of the groove 130 is set to satisfy: 45°≤a≤60°, which can ensure the opening size of the opening of the groove 130, reduce the forming difficulty of the groove 130, and also ensure the space size of the expansion space 150, ensure that the gas and the liquid can be separated in the expansion space 150, so that the gas can be smoothly discharged, and the exhaust effect of the shell 100 is ensured to a certain extent.

[0165] In a specific example, the included angle a between the opposite two side walls of the groove 130 and the extension plane of the bottom wall of the groove 130 is 45°, 50°, 55° or 60°, etc.

[0166] In some embodiments, the heat absorption piece 200 includes a phase change heat absorption material 220 (for the specific structure of the phase change heat absorption material 220, please refer to Figure 11 ), and the volume V of the expansion space 150 and the volume V0 of the phase change heat absorption material 220 satisfy: 10%≤V / V0≤20%. While ensuring the space size of the expansion space 150, the volume of the phase change heat absorption material 220 can also be ensured, which is beneficial to ensure the heat absorption performance of the phase change heat absorption material 220, and ensure that the gas and the liquid can be effectively separated in the expansion space 150, so that the gas can be smoothly discharged, and the exhaust effect of the shell 100 is ensured to a certain extent.

[0167] In some embodiments, as shown in Figure 4As shown, the expansion space 150 includes a first expansion space 151 and a second expansion space 152 arranged on opposite sides of the groove 130. In this way, the gas-liquid and gas-solid separation of the heat absorption member 200 during heat absorption can be achieved on both sides of the groove 130, and the heat absorption effect of the heat absorption member 200 is ensured to a certain extent.

[0168] In some embodiments, the cover plate 300 is provided with a first explosion-proof valve (not shown in the figure) communicating with the exhaust channel 400. The first explosion-proof valve is configured to break when a certain pressure is reached inside the exhaust channel 400, so as to discharge the gas in the exhaust channel 400. Here, it is meant that when the internal pressure of the exhaust channel 400 does not reach a certain pressure, the first explosion-proof valve does not break to block the exhaust channel 400, to a certain extent, avoiding the entry of external foreign matter, dust, etc. into the exhaust channel 400; when the internal pressure of the exhaust channel 400 reaches a certain pressure, the first explosion-proof valve breaks, at which time the gas in the exhaust channel 400 can be discharged through the first explosion-proof valve, to a certain extent, avoiding the excessive gas pressure and temperature of the heat absorption assembly 1000, which is conducive to prolonging the service life of the heat absorption assembly 1000 and improving the heat absorption performance of the heat absorption assembly 1000, so that the use of the heat absorption assembly 1000 can effectively reduce the risk of heat diffusion of the battery assembly, and improve the safety and reliability of the battery assembly.

[0169] In some embodiments, the first explosion-proof valve can directly or indirectly communicate with the external space of the battery assembly, so as to realize the communication between the exhaust channel 400 and the external space of the battery assembly, and facilitate the direct discharge of the gas generated by the heat absorption member 200 to the outside of the battery assembly, to a certain extent, avoiding the heat diffusion in the battery assembly and improving the use safety of the battery assembly.

[0170] In some embodiments, the first explosion-proof valve includes at least two, and the at least two first explosion-proof valves are arranged at intervals in the extension direction of the exhaust channel 400. The cooperation of the at least two first explosion-proof valves can improve the exhaust effect of the exhaust channel 400, so that when the internal pressure of the exhaust channel 400 reaches a certain pressure, the gas in the exhaust channel 400 can be effectively discharged, to a certain extent, avoiding the excessive gas pressure and temperature of the heat absorption assembly 1000.

[0171] In some embodiments, in combination with Figure 1 and Figure 2 As shown, the shell 100 further includes a sealing cover 170, at least one end of the main body part 160 is open, and the sealing cover 170 is arranged at the opening of the main body part 160. The sealing cover 170 and the main body part 160 cooperate to form the containing cavity 110. In this way, the forming difficulty of the containing cavity 110 is reduced, and the assembly difficulty of the heat absorption member 200 is also reduced.

[0172] With the above settings, in a specific example, the heat absorber 200 can be assembled into the main body 160 through the opening of the main body 160 first. After the heat absorber 200 is assembled, the sealing cover 170 is placed at the opening of the main body 160 to realize the heat absorber 200 is placed inside the housing 100, thereby reducing the assembly difficulty of the heat absorber 200.

[0173] It should be noted that the sealing cap 170 is located at the opening of the main body 160. The sealing cap 170 and the main body 160 can be fixed by welding, bonding, snap-fitting or stud connection, etc., and no specific restrictions are made here.

[0174] In some embodiments, the housing 100 is formed as a cuboid, and the dimension of the housing 100 in the length direction is larger than the dimensions of the housing 100 in the height direction and the thickness direction; the cover plate 300 is disposed on the top of the main body portion 160; the sealing cap 170 is disposed at one end of the main body portion 160 in the length direction. To a certain extent, interference between the cover plate 300 and the sealing cap 170 is avoided, and the molding difficulty of the housing 100 is reduced.

[0175] In some embodiments, the sealing cover 170 is provided with a second explosion-proof valve (not shown in the figure) communicating with the exhaust channel 400. The second explosion-proof valve is configured to rupture after a certain pressure is reached inside the exhaust channel 400 to discharge the gas inside the exhaust channel 400. This can be understood as not being limited to providing a first explosion-proof valve communicating with the exhaust channel 400 on the cover plate 300, but also providing a second explosion-proof valve communicating with the exhaust channel 400 on the sealing cover 170. The second explosion-proof valve is configured to rupture after the pressure inside the exhaust channel 400 reaches a certain pressure. Thus, when the internal pressure of the exhaust channel 400 reaches a certain pressure, the gas inside the exhaust channel 400 can be discharged through the second explosion-proof valve, thereby discharging the gas generated inside the heat-absorbing component 1000. This, to a certain extent, avoids excessively high gas pressure and temperature in the heat-absorbing component 1000, which is beneficial for extending the service life of the heat-absorbing component 1000 and improving its heat absorption performance. Therefore, the heat-absorbing component 1000 can effectively reduce the risk of heat diffusion in the battery assembly, improving the safety and reliability of the battery assembly.

[0176] In the description of this utility model, features defined as "first" and "second" may explicitly or implicitly include one or more of the features, used to distinguish and describe features, without any order or importance.

[0177] In a specific example, when the internal pressure of the exhaust passage 400 does not reach a certain pressure, the second explosion-proof valve does not break to block the exhaust passage 400, to some extent avoiding the entry of external foreign matter, dust, etc. into the exhaust passage 400; when the internal pressure of the exhaust passage 400 reaches a certain pressure, the second explosion-proof valve breaks, at which time the gas in the exhaust passage 400 can be discharged through the second explosion-proof valve to achieve the discharge of the gas generated in the heat absorption assembly 1000.

[0178] In some embodiments, the second explosion-proof valve communicates with the external space of the battery assembly to achieve the communication of the exhaust passage 400 with the external space of the battery assembly, facilitating the direct discharge of the gas generated by the heat absorption member 200 to the outside of the battery assembly, to some extent avoiding the thermal diffusion in the battery assembly and improving the use safety of the battery assembly.

[0179] In other embodiments, the cover plate 300 is provided with a first explosion-proof valve communicating with the exhaust passage 400, and the sealing cover 170 is provided with a second explosion-proof valve communicating with the exhaust passage 400, and the first explosion-proof valve and the second explosion-proof valve are both used to break when the internal pressure of the exhaust passage 400 reaches a certain pressure, so that the first explosion-proof valve and the second explosion-proof valve can be used to cooperate to discharge the gas in the exhaust passage 400, to improve the exhaust effect of the exhaust passage 400, so that the gas in the exhaust passage 400 can be effectively discharged, to some extent avoiding the excessive gas pressure and temperature of the heat absorption assembly 1000.

[0180] In some embodiments, the second explosion-proof valve is arranged on the sealing cover 170 and is arranged close to the bottom of the shell 100. In this way, when the second explosion-proof valve breaks and the gas in the exhaust passage 400 is discharged through the second explosion-proof valve, to some extent, the high-temperature gas discharged from the exhaust passage 400 can be avoided to cause harm to the surrounding environment and the human body, further improving the safety and reliability of the battery assembly.

[0181] In some embodiments, the shell 100 is an aluminum shell or a steel shell. When the shell 100 is an aluminum shell, the density of the aluminum alloy is relatively low, which is beneficial to realize the lightweight of the heat absorption assembly 1000, and the shell 100 has good thermal conductivity, so that the heat absorption member 200 can effectively exchange heat with the battery monomer through the shell 100 to maintain the appropriate working temperature of the battery monomer, and the aluminum alloy has good plasticity and processing performance, and various shapes and structures of the shell 100 can be made through processes such as die casting, extrusion, and stretching, so that the shell 100 is easy to process and shape while having a certain strength.

[0182] When the shell 100 is made of steel, the steel shell has good compression resistance and impact resistance, so that the shell 100 has high strength and physical stability, and the price of the steel shell is relatively low, which helps to reduce the overall cost of the heat absorption assembly 1000. At the same time, the steel shell performs well in the fire test, ensuring the safety of the shell 100.

[0183] The heat absorption assembly 1000 of the embodiment of the present application is described below with reference to the accompanying drawings of the specification.

[0184] In combination with Figure 1 and Figure 2 , the heat absorption assembly 1000 according to the embodiment of the present application comprises a shell 100 and a heat absorption member 200.

[0185] The shell 100 is the aforementioned shell 100, and the specific structure of the shell 100 is not described here.

[0186] In combination with Figure 1 and Figure 2 , the heat absorption member 200 is arranged in the accommodating cavity 110 of the shell 100. By arranging the heat absorption member 200 in the shell 100, the heat absorption member 200 is supported and protected by the shell 100, the service life of the heat absorption member 200 is prolonged, the position stability of the heat absorption member 200 is improved, the heat absorption performance of the heat absorption member 200 is ensured to a certain extent, the heat absorption member 200 can effectively absorb the heat of the battery monomer, the temperature of the battery monomer can be adjusted to maintain within a normal range, and the risk of thermal runaway of the battery monomer is avoided to a certain extent, thereby improving the use safety and performance of the battery assembly.

[0187] At the same time, the heat absorption assembly 1000 of the embodiment of the present application, by adopting the aforementioned shell 100 of the heat absorption assembly 1000, can also use the exhaust passage 400 to exhaust the gas generated by the heat absorption member 200, and can realize directional exhaust of the heat absorption member 200, thereby avoiding excessive gas pressure and temperature of the heat absorption member 200 to a certain extent, which is beneficial to prolong the service life of the heat absorption member 200 and improve the heat absorption performance of the heat absorption member 200, thereby improving the heat absorption performance of the heat absorption assembly 1000, so that the heat absorption assembly 1000 can effectively reduce the risk of heat diffusion of the battery assembly, and improve the safety and reliability of the battery assembly. In order to realize the use of the heat absorption assembly 1000 to reduce the risk of heat diffusion of the battery assembly, thereby improving the safety and reliability of the battery assembly, and ensuring the working performance of the battery assembly to a certain extent.

[0188] In some embodiments, in combination with Figure 10 and Figure 11 , the heat absorption member 200 comprises a phase change heat absorption material 220. In order to ensure the heat absorption effect of the heat absorption member 200.

[0189] In some embodiments, the phase change heat absorber 220 includes a hydrogel to ensure the performance of the phase change heat absorber 220 to a certain extent.

[0190] In some embodiments, combined with Figure 10 and Figure 11 As shown, the heat absorber 200 also includes a support frame 210, which is disposed within the receiving cavity 110. The phase change heat absorber material 220 is connected to the support frame 210. The support frame 210 supports the phase change heat absorber material 220, thereby shaping the phase change heat absorber material 220 and improving its heat absorption performance to a certain extent. It also helps to prevent the phase change heat absorber material 220 from flowing upward and deforming and blocking the exhaust port 120 when heated or compressed, allowing the gas generated by the heat absorber 200 to be discharged smoothly.

[0191] In addition, the support frame 210 can improve the structural strength of the heat absorber 200, so that the heat absorber 200 has the ability to resist deformation. This can, to a certain extent, prevent the heat absorber 200 from being excessively deformed when the battery cell expands, so as to ensure the performance of the heat absorber 200.

[0192] The supporting frame 210 mentioned here can be a metal frame.

[0193] In some embodiments, such as Figure 11 As shown, the support frame 210 is hollowed out. Because the phase change heat-absorbing material 220 will expand in volume after absorbing heat and undergoing a phase change, the hollowed-out support frame 210 can avoid the expanding phase change heat-absorbing material 220, thereby enabling the support frame 210 to effectively support the phase change heat-absorbing material that expands in volume after the phase change.

[0194] It should be noted that when the heat absorber 200 includes a supporting frame 210 and a phase change heat absorber material 220, and when it is necessary to wrap the ventilator 500 around the outer periphery of the heat absorber 200, the ventilator 500 can be wrapped around the outer periphery of the supporting frame 210 (in conjunction with...). Figure 10 and Figure 11 (As shown), to reduce the assembly difficulty of the ventilator 500.

[0195] In some embodiments, the support framework 210 is formed with a honeycomb structure having channels, the exhaust passage 400 is located at the top of the shell 100, the channels of the honeycomb structure extend in parallel with the height direction or thickness direction of the shell 100, and at least part of the phase change heat absorption material 220 is filled in the honeycomb structure. Among them, by filling at least part of the phase change heat absorption material 220 in the honeycomb structure, the phase change heat absorption material 220 is connected to the support framework 210, the support framework 210 is used to support the phase change heat absorption material 220, the heat absorption performance of the phase change heat absorption material 220 is improved to some extent, and the phase change heat absorption material 220 is prevented from flowing upward and deforming to block the exhaust hole 120 when heated and extruded, so that the gas generated by the heat absorption member 200 can be smoothly discharged.

[0196] At the same time, by setting the extension direction of the channels of the honeycomb structure to be parallel to the height direction of the shell 100, the opening direction of the channels can be directed towards the exhaust passage 400 at the top, thereby facilitating the improvement of the exhaust efficiency; by setting the extension direction of the channels of the honeycomb structure to be parallel to the thickness direction of the shell 100, the opening direction of the channels can be directed towards the adjacent battery monomer, thereby facilitating the improvement of the strength of the battery assembly.

[0197] In some embodiments, as shown in Figure 3 , Figure 4 and Figure 5 , the shell 100 includes a main body 160 and a cover plate 300, at least part of the top wall of the main body 160 is recessed towards the accommodating cavity 110 to form a recess 130, at least part of the cover plate 300 covers the recess 130 to form an exhaust passage 400, and the heat absorption member 200 is arranged in a spaced manner with the bottom wall of the recess 130. In turn, the heat absorption member 200 is arranged in a spaced manner with the top wall of the main body 160, which on the one hand reduces the installation difficulty of the heat absorption member 200, thereby reducing the assembly difficulty of the heat absorption assembly 1000, and on the other hand facilitates the formation of the expansion space 150, reduces the forming difficulty of the expansion space 150, and ensures the volume of the expansion space 150.

[0198] In specific examples, as shown in Figure 4 and Figure 5 , at least part of the top wall of the main body 160 is recessed towards the accommodating cavity 110 to form a recess 130, the recess 130 and the cover plate 300 cooperate to form an exhaust passage 400, the heat absorption member 200 is arranged in a spaced manner with the recess 130, and the opposite sides of the recess 130 form an expansion space 150. That is, by recessing at least part of the top wall of the main body 160 towards the accommodating cavity 110 to form a recess 130, the exhaust passage 400 and the expansion space 150 can be formed after the heat absorption assembly 1000 is assembled, thereby reducing the forming difficulty of the exhaust passage 400 and the expansion space 150.

[0199] In some embodiments, the distance H1 between the bottom wall of the recess 130 and the bottom wall of the main body part 160 is set to be greater than the maximum height H2 of the heat absorption member 200 (the specific illustration of H1 and H2 can be seen from Figure 3 ), so that when the heat absorption member 200 is arranged in the accommodation cavity 110, the heat absorption member 200 and the recess 130 can be arranged at intervals.

[0200] At the same time, by setting the distance H1 between the bottom wall of the recess 130 and the bottom wall of the main body part 160 to be greater than the maximum height H2 of the heat absorption member 200, the assembly difficulty of the heat absorption member 200 can be reduced, so as to facilitate the assembly of the heat absorption member 200 between the recess 130 and the bottom wall of the main body part 160, and further facilitate the assembly of the heat absorption member 200 in the accommodation cavity 110.

[0201] In some embodiments, in the height direction of the shell 100, the minimum distance L1 between the heat absorption member 200 and the bottom wall of the recess 130 and the height L of the heat absorption member 200 satisfy: 5%≤L1 / L≤30%. While ensuring a certain height of the heat absorption member 200, a certain distance between the heat absorption member 200 and the bottom wall of the recess 130 is also ensured, so as to realize the reservation of expansion space for the heat absorption member 200, so that the phase change heat absorption material 220 can effectively produce volume expansion after heat absorption phase change, further ensure the heat absorption effect of the heat absorption member 200 to a certain extent, and facilitate the separation of gas and liquid, so that the gas can be smoothly discharged, and the performance of the heat absorption assembly 1000 is ensured to a certain extent.

[0202] Among them, the minimum distance L1 between the heat absorption member 200 and the bottom wall of the recess 130 can be understood as the distance between the top wall of the heat absorption member 200 and the bottom wall of the recess 130.

[0203] The battery assembly of the utility model embodiment is described below.

[0204] According to the battery assembly of the utility model embodiment, the battery assembly comprises a battery monomer and a heat absorption assembly 1000.

[0205] Among them, the heat absorption assembly 1000 is the heat absorption assembly 1000 described above, and the specific structure of the heat absorption assembly 1000 is not described here, and the heat absorption assembly 1000 is arranged on one side of the battery monomer.

[0206] Among them, the heat absorption assembly 1000 is arranged on any side of the battery monomer, and the heat absorption assembly 1000 directly contacts or does not directly contact the battery monomer.

[0207] The battery assembly of the utility model embodiment, by adopting the foregoing heat absorption assembly 1000, the risk of heat diffusion of the battery assembly is reduced by using the heat absorption assembly 1000, and the safety and reliability of the battery assembly are improved, and the working performance of the battery assembly is ensured to a certain extent.

[0208] In some embodiments, the battery monomer includes a plurality of heat absorption assemblies 1000 are arranged between at least two adjacent battery monomers. In this way, not only the adjacent arrangement of the battery monomer and the heat absorption assembly 1000 can be realized, but also one heat absorption assembly 1000 can simultaneously absorb the heat of the battery monomers on both sides, thereby improving the heat dissipation effect of the battery monomer, so that the temperature of the battery monomer can be maintained within a suitable temperature range, prolonging the service life of the battery monomer and improving the use safety of the battery monomer.

[0209] At the same time, by arranging the heat absorption assembly 1000 between at least two adjacent battery monomers, the heat absorption assembly 1000 can also be used for heat insulation, so as to avoid the mutual heat transfer between the two adjacent battery monomers to a certain extent, and further reduce the risk of heat diffusion of the battery monomer.

[0210] In some embodiments, at least two battery monomers are arranged in an interval. In order to arrange the heat absorption assembly 1000 between at least two adjacent battery monomers, the assembly difficulty of the battery monomer and the heat absorption assembly 1000 is reduced.

[0211] It should be noted that the adjacent battery monomers and the heat absorption assembly 1000 can be distributed in an interval, at which time the battery monomer and the heat absorption assembly 1000 transfer heat through heat radiation; the adjacent battery monomers and the heat absorption assembly 1000 can also be in contact with each other to realize the heat transfer between the adjacent battery monomers and the heat absorption assembly 1000.

[0212] In some embodiments, the heat absorption member 200 includes a phase change heat absorption material 220, which is used for phase change and absorbing the heat generated by thermal runaway when at least one battery monomer is in thermal runaway. Thus, the heat absorption member 200 is used to absorb the heat of the battery monomer in thermal runaway, so that the temperature of the battery monomer can be maintained within a suitable temperature range, prolonging the service life of the battery monomer.

[0213] In some embodiments, at least two adjacent battery monomers are arranged along the thickness direction of the shell 100 of the heat absorption assembly 1000. In this way, the contact area of the battery monomer and the heat absorption assembly 1000 is increased, and the heat exchange effect of the battery monomer and the heat absorption assembly 1000 is improved.

[0214] In addition, by arranging the battery assembly to include a plurality of battery monomers, the capacity of the battery assembly is increased by cooperation, and the working performance of the battery assembly is ensured to a certain extent.

[0215] In some embodiments, the plurality of battery cells can be connected in series, in parallel or in a mixed manner, the mixed manner referring to that the plurality of battery cells are connected in both series and parallel, and the plurality of battery cells can be directly connected in series, in parallel or in a mixed manner.

[0216] In some embodiments, the battery assembly comprises a box body, and the battery cells and the heat absorption assembly 1000 are arranged in the box body to form the battery assembly. While enabling the battery cells and the heat absorption assembly 1000 to be arranged adjacently, the battery assembly can also support and protect the battery cells and the heat absorption assembly 1000 by using the box body, prolong the service life of the battery cells and the heat absorption assembly 1000, and improve the use safety of the battery cells and the heat absorption assembly 1000, so as to ensure the use safety of the battery assembly to a certain extent.

[0217] Optionally, the box body is provided with a pressure relief channel communicating with the exhaust channel 400, and the pressure relief channel is used for discharging the gas in the exhaust channel 400 to the outside of the box body, so as to avoid causing short circuit arc of other battery cells in the battery assembly, and improve the use safety of the battery assembly.

[0218] The power device according to the embodiments of the present application is described below.

[0219] The power device according to the embodiments of the present application comprises: a battery assembly, which is used for supplying power for the power device.

[0220] The battery assembly is the battery assembly described above, and the specific structure of the battery assembly is not described herein.

[0221] As can be seen from the above structure, the power device according to the embodiments of the present application adopts the battery assembly described above, so as to ensure the working performance of the power device and improve the use safety of the power device.

[0222] It should be noted that the power device of the present application includes but is not limited to vehicles, ships, spacecraft and energy storage systems, etc.

[0223] When the power device is a vehicle, the vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc.

[0224] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, and can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0225] Other configurations of the heat absorption assembly 1000, the shell 100 of the heat absorption assembly 1000, the battery assembly, and the power consuming device, such as the specific structure of the battery assembly, are known to those skilled in the art, and will not be described in detail herein.

[0226] In the description of the present specification, the description referring to the terms "embodiment", "example", and the like means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0227] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A housing for a heat-absorbing component, characterized in that, The housing includes a venting element (500), and a receiving cavity (110) and an exhaust channel (400) communicating with the receiving cavity (110) are formed inside the housing. The receiving cavity (110) is adapted to accommodate a heat-absorbing element (200), and the venting element (500) is disposed between the exhaust channel (400) and the heat-absorbing element (200).

2. The housing of the heat-absorbing component according to claim 1, characterized in that, The housing includes: The main body (160) has a hollow interior forming the receiving cavity (110), and the outer peripheral wall of the main body (160) is provided with an exhaust hole (120) that penetrates it, and the exhaust hole (120) communicates with the receiving cavity (110). A cover plate (300) is disposed on the outside of the main body (160) and covers the vent hole (120). At least a portion of the cover plate (300) is spaced apart from the main body (160) to form an vent passage (400) between the main body (160) and the cover plate (300). The vent passage (400) communicates with the receiving cavity (110) through the vent hole (120).

3. The housing of the heat-absorbing component according to claim 2, characterized in that, The breathable element (500) is a polytetrafluoroethylene membrane; and / or The air permeability of the breathable component (500) is 1500ml / min-2000ml / min, and the water pressure resistance of the breathable component (500) is >60kpa.

4. The housing of the heat-absorbing component according to claim 2, characterized in that, The vent (500) is provided on the side of the main body (160) facing the cover plate (300) and covers the exhaust hole (120).

5. The housing of the heat-absorbing component according to claim 2, characterized in that, The venting element (500) is disposed in the receiving cavity (110) and located between the exhaust hole (120) and the heat-absorbing element (200).

6. The housing of the heat-absorbing component according to claim 5, characterized in that, The venting member (500) is spaced apart from the outer peripheral wall of the main body (160) which has the exhaust hole (120).

7. The housing of the heat-absorbing component according to claim 1, characterized in that, The breathable element (500) is adapted to wrap around the outer periphery of the heat-absorbing element (200).

8. The housing of the heat-absorbing component according to claim 5, characterized in that, It also includes a support frame (600), which is disposed in the receiving cavity (110) and located between the exhaust hole (120) and the heat-absorbing member (200), and the venting member (500) is disposed on the support frame (600).

9. The housing of the heat-absorbing component according to claim 8, characterized in that, The support frame (600) is fixedly engaged with the housing by a fixing component (700).

10. The housing of the heat-absorbing component according to claim 9, characterized in that, The fixing component (700) includes a fixing protrusion (710) and a fixing groove (720). The fixing protrusion (710) is fixedly fitted in the fixing groove (720). One of the fixing protrusion (710) and the fixing groove (720) is located in the support frame (600), and the other is located in the housing.

11. The housing of the heat-absorbing component according to claim 8, characterized in that, It also includes a clamping element (800), through which the ventilated element (500) is pressed into the support frame (600).

12. The housing of the heat-absorbing component according to claim 11, characterized in that, The clamping member (800) is a clamping frame with a hollow interior. The clamping frame is pressed against the ventilated member (500) and has an interference fit with the support frame (600).

13. The housing of the heat-absorbing component according to claim 2, characterized in that, The vent (120) is located on the top wall of the main body (160), and the cover plate (300) is located on the outer side of the top wall of the main body (160).

14. The housing of the heat-absorbing component according to claim 2, characterized in that, At least a portion of the top wall of the main body (160) is recessed toward the receiving cavity (110) to form a groove (130), at least a portion of the cover plate (300) is provided to cover the groove (130) to form the exhaust passage (400), and the exhaust hole (120) is provided in the groove (130).

15. The housing of the heat-absorbing assembly according to claim 14, characterized in that, The top wall of the main body (160) also has a recessed step (140) that sinks toward the receiving cavity (110), the recessed step (140) is located on the outer periphery of the groove (130), and the cover plate (300) is installed on the step surface of the recessed step (140).

16. The housing of the heat-absorbing assembly according to claim 15, characterized in that, The sinking height of the sinking step (140) is greater than or equal to the thickness of the cover plate (300).

17. The housing of the heat-absorbing assembly according to claim 14, characterized in that, The sidewall of the groove (130) is at least partially spaced from the sidewall of the main body (160). An expansion space (150) is formed between the top wall of the main body (160), the sidewall of the main body (160), and the heat absorber (200). The exhaust hole (120) is located on the sidewall of the groove (130) and faces the expansion space (150).

18. The housing of the heat-absorbing assembly according to claim 17, characterized in that, The groove (130) is recessed along the height direction of the housing and extends along the length direction of the housing; in the thickness direction of the housing, the opposite side walls of the groove (130) are spaced apart from the opposite side walls of the main body (160).

19. The housing of the heat-absorbing assembly according to claim 14, characterized in that, In the direction from the bottom wall of the groove (130) toward the opening of the groove (130), the opposite side walls of the groove (130) extend obliquely away from each other.

20. The housing of the heat-absorbing assembly according to claim 19, characterized in that, The included angle α between the opposite side walls of the groove (130) and the extended surface of the bottom wall of the groove (130) satisfies: 45°≤a≤60°.

21. The housing of the heat-absorbing assembly according to claim 17, characterized in that, The heat-absorbing element (200) includes a phase change heat-absorbing material (220), and the volume V of the expansion space (150) and the volume V0 of the phase change heat-absorbing material (220) satisfy: 10% ≤ V / V0 ≤ 20%.

22. The housing of the heat-absorbing component according to claim 1, characterized in that, The housing (100) is made of aluminum or steel.

23. A heat-absorbing component, characterized in that, include: A housing, wherein the housing is the housing according to any one of claims 1-22; Heat absorber (200) is disposed in the receiving cavity (110) of the housing.

24. The heat-absorbing component according to claim 23, characterized in that, The heat-absorbing element (200) includes a phase change heat-absorbing material (220).

25. The heat-absorbing component according to claim 24, characterized in that, The phase change heat-absorbing material (220) includes a hydrogel.

26. The heat-absorbing component according to claim 24, characterized in that, The heat-absorbing element (200) also includes a support frame (210), which is disposed in the receiving cavity (110), and the phase change heat-absorbing material (220) is connected to the support frame (210).

27. The heat-absorbing component according to claim 26, characterized in that, A honeycomb structure is formed within the support frame (210), the honeycomb structure has channels, the exhaust channel (400) is located at the top of the shell, the channel of the honeycomb structure extends in a direction parallel to the height or thickness of the shell, and at least a portion of the phase change heat-absorbing material (220) is filled within the honeycomb structure.

28. The heat-absorbing component according to claim 23, characterized in that, The housing includes a main body (160) and a cover plate (300). At least a portion of the top wall of the main body (160) is recessed toward the receiving cavity (110) to form a groove (130). At least a portion of the cover plate (300) covers the groove (130) to form the exhaust channel (400). The heat-absorbing element (200) is spaced apart from the bottom wall of the groove (130).

29. The heat-absorbing component according to claim 28, characterized in that, In the height direction of the housing, the minimum distance L1 between the heat absorber (200) and the bottom wall of the groove (130) satisfies the following condition with respect to the height L of the heat absorber (200): 5% ≤ L1 / L ≤ 30%.

30. A battery assembly, characterized in that, include: Battery cell; A heat-absorbing component, wherein the heat-absorbing component is the heat-absorbing component according to any one of claims 23-29, and the heat-absorbing component is disposed on one side of the battery cell.

31. The battery assembly according to claim 30, characterized in that, The battery assembly includes a plurality of battery cells, and the heat-absorbing assembly is provided between at least two adjacent battery cells; the heat-absorbing element (200) includes a phase change heat-absorbing material (220), which is used to undergo a phase change and absorb the heat generated by thermal runaway when at least one of the battery cells undergoes thermal runaway.

32. An electrical appliance, characterized in that, Includes the battery assembly as described in claim 30 or 31.

Images