Housing assembly and battery cell

Abstract

The utility model discloses a shell assembly and a battery monomer, the shell assembly is used for the battery monomer, and the shell assembly comprises a shell body provided with an anti-explosion valve; the end plate is arranged in the shell body and is positioned on one side, facing the anti-explosion valve, of the pole group of the battery monomer, and a plurality of through holes opposite to the anti-explosion valve are formed in the end plate; and the shielding piece is arranged on the end plate in a sleeving mode and is opposite to the anti-explosion valve, and the projections, facing the shielding piece, of the multiple through holes all fall into the outline of the shielding piece. According to the shell assembly disclosed by the utility model, the end plate is positioned on one side, facing the anti-explosion valve, of the pole group of the battery monomer, the shielding piece is sleeved on the end plate and is opposite to the anti-explosion valve, and the projections of the plurality of through holes of the end plate, facing the shielding piece, all fall into the outline of the shielding piece, so that the shielding piece can block electrolyte; the anti-explosion valve is prevented from being damaged easily due to the fact that electrolyte directly impacts on the anti-explosion valve, normal use of the battery single body is ensured, the shielding piece and the end plate are connected conveniently and easily, and the assembling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more specifically, to a housing assembly and a battery cell. Background Art

[0002] In the related art, when the battery cell is placed, if the explosion-proof valve is located below the housing assembly, the electrolyte of the battery cell will accumulate at the explosion-proof valve. When the battery cell shakes, the electrolyte will shake back and forth, causing the electrolyte to continuously impact the explosion-proof valve, easily resulting in damage to the explosion-proof valve and causing problems such as leakage of the battery cell, and easily causing the explosion-proof valve to open in advance, affecting the normal use of the battery cell. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a housing assembly that can prevent the electrolyte from directly impacting the explosion-proof valve and causing damage to the explosion-proof valve, and the shielding member is conveniently and simply connected to the end plate, which is beneficial to improving the assembly efficiency.

[0004] Another object of the utility model is to provide a battery cell having the above housing assembly.

[0005] The housing assembly according to an embodiment of the utility model is used for a battery cell and includes: a housing body, on which an explosion-proof valve is provided; an end plate provided inside the housing body and on the side of the electrode group of the battery cell facing the explosion-proof valve, and a plurality of through holes opposite to the explosion-proof valve are provided on the end plate; a shielding member sleeved on the end plate and opposite to the explosion-proof valve, and the projections of the plurality of through holes facing the shielding member all fall within the contour of the shielding member.

[0006] The housing assembly according to an embodiment of the utility model, by the end plate being on the side of the electrode group of the battery cell facing the explosion-proof valve, the shielding member being sleeved on the end plate and opposite to the explosion-proof valve, and the projections of the plurality of through holes of the end plate facing the shielding member all falling within the contour of the shielding member, enables the shielding member to block the electrolyte, prevent the electrolyte from directly impacting the explosion-proof valve and causing damage to the explosion-proof valve, ensure the normal use of the battery cell, and the shielding member is conveniently and simply connected to the end plate, which is beneficial to improving the assembly efficiency.

[0007] In addition, the housing assembly according to the above embodiment of the utility model may further have the following additional technical features:

[0008] According to some embodiments of the present utility model, the shielding member includes: a shielding portion, the shielding portion is located on one side in the thickness direction of the end plate and is opposite to the explosion-proof valve; a clamping portion, clamping portions are provided at both ends of the shielding portion along the width direction of the end plate, the end plate is located between the two clamping portions, and one ends of the two clamping portions away from the shielding portion are bent towards each other and abutted against the end plate.

[0009] According to some embodiments of the present utility model, the end plate includes: an avoidance portion, an avoidance hole is provided on the avoidance portion; a circulation portion, the circulation portion is connected to one end in the length direction of the avoidance portion, a plurality of through holes are provided on the circulation portion, and the shielding member is sleeved on the circulation portion.

[0010] According to some embodiments of the present utility model, a groove is formed on one side of the circulation portion facing the explosion-proof valve, a plurality of through holes are provided on the bottom wall of the groove, and the shielding portion is located on one side of the groove close to the explosion-proof valve.

[0011] According to some embodiments of the present utility model, reinforcing ribs are provided in the groove, and the reinforcing ribs extend along the length direction or the width direction of the end plate.

[0012] According to some embodiments of the present utility model, the distance between the bottom wall of the groove and the side of the shielding portion facing the through hole is 0.5 mm - 10 mm.

[0013] According to some embodiments of the present utility model, the thickness of the shielding member is 0.1 mm - 2 mm.

[0014] According to some embodiments of the present utility model, the shielding member includes a plurality of sub-shielding members, the plurality of sub-shielding members are arranged at intervals along the length direction of the end plate, and the projections of the plurality of through holes facing the sub-shielding members fall within the contours of the plurality of sub-shielding members.

[0015] According to some embodiments of the present utility model, the shielding member is an epoxy resin member, a metal member or a plastic member.

[0016] A battery cell according to an embodiment of the present utility model includes the housing assembly according to an embodiment of the present utility model.

[0017] For the battery cell according to an embodiment of the present utility model, the end plate is located on the side of the electrode group of the battery cell facing the explosion-proof valve, the shielding member is sleeved on the end plate and is opposite to the explosion-proof valve, and the projections of the plurality of through holes of the end plate facing the shielding member all fall within the contour of the shielding member, so that the shielding member can block the electrolyte and prevent the electrolyte from directly impacting on the explosion-proof valve and easily causing damage to the explosion-proof valve, ensuring the normal use of the battery cell, and the connection between the shielding member and the end plate is convenient and simple, which is beneficial to improving the assembly efficiency.

[0018] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Description of the Drawings

[0019] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a partial cross-sectional view of a battery cell according to an embodiment of the present utility model;

[0021] Figure 2 is an exploded view of an end plate and a shielding member at an angle according to an embodiment of the present utility model;

[0022] Figure 3 is an exploded view of the end plate and the shielding member at another angle according to an embodiment of the present utility model;

[0023] Figure 4 is a schematic structural view of the cooperation between the end plate and the shielding member according to an embodiment of the present utility model;

[0024] Figure 5 is a left view of the cooperation between the end plate and the shielding member according to an embodiment of the present utility model;

[0025] Figure 6 is a right view of the cooperation between the end plate and the shielding member according to an embodiment of the present utility model;

[0026] Figure 7 is a bottom view of the shielding member according to an embodiment of the present utility model.

[0027] Reference Numerals:

[0028] 100, housing assembly; 200, battery cell;

[0029] 10, housing body; 11, explosion-proof valve;

[0030] 20, end plate; 21, through hole; 22, avoidance portion; 23, flow portion; 221, avoidance hole; 222, body portion; 223, limiting portion; 231, groove; 232, reinforcing rib;

[0031] 30, shielding member; 32, shielding portion; 33, clamping portion; 34, sub-shielding member;

[0032] 40, electrode group;

[0033] 50, insulating member. Detailed Embodiments

[0034] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0035] In the description of the present utility model, 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", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0036] In the description of the present utility model, the "first feature" and "second feature" may include one or more of such features. The meaning of "a plurality" is two or more. The first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. The first feature being "above", "above the top of", and "on the upper surface of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature.

[0037] The housing assembly 100 according to an embodiment of the present utility model will be described below with reference to the accompanying drawings.

[0038] Referring to Figure 1 As shown, the housing assembly 100 according to an embodiment of the present utility model is for a battery cell 200 and may include: a housing body 10 and an end plate 20. Among them, the battery cell 200 may be a blade battery.

[0039] Specifically, an explosion-proof valve 11 is provided on the housing body 10. The end plate 20 is disposed inside the housing body 10, and the end plate 20 is located on the side of the electrode group 40 of the battery cell 200 facing the explosion-proof valve 11 (for example, Figure 1 the left side shown in

[0040] AsFigure 3 As shown in Figure 6 Figure 6 , a plurality of (greater than or equal to two) through holes 21 are provided on the end plate 20. The plurality of through holes 21 are opposite to the explosion-proof valve 11, so that the plurality of through holes 21 can communicate the electrode group 40 and the explosion-proof valve 11. When the battery cell 200 undergoes thermal runaway, the gas in the housing assembly 100 can smoothly pass through the plurality of through holes 21 and rush out from the explosion-proof valve 11, realizing pressure relief and exhaust, releasing the internal pressure of the battery cell 200, and ensuring the use safety of the battery cell 200.

[0041] In the related art, when the battery cell is placed, if the explosion-proof valve is located below the housing assembly, the electrolyte of the battery cell will accumulate at the explosion-proof valve. When the battery cell shakes, the electrolyte will shake back and forth, causing the electrolyte to continuously impact the explosion-proof valve, easily damaging the explosion-proof valve and resulting in problems such as liquid leakage of the battery cell, and easily causing the explosion-proof valve to open in advance, affecting the normal use of the battery cell.

[0042] Therefore, in the present utility model, as shown in Figures 2 - 6 Figures 2 - 6 , the housing assembly 100 further includes a shielding member 30. The shielding member 30 is sleeved on the end plate 20, and the shielding member 30 is opposite to the explosion-proof valve 11. The projections of the plurality of through holes 21 towards the shielding member 30 all fall within the contour of the shielding member 30. Thus, when the battery cell 200 vibrates, the electrolyte can be blocked by the shielding member 30. For example, the shielding member 30 can block the electrolyte flowing from the plurality of through holes 21 to the explosion-proof valve 11 or block the electrolyte from flowing to the plurality of through holes 21, preventing the electrolyte from directly impacting the explosion-proof valve 11 and easily damaging the explosion-proof valve 11, thereby avoiding problems such as liquid leakage of the battery cell 200 and premature opening of the explosion-proof valve 11, and ensuring the normal use of the battery cell 200. At the same time, the shielding member 30 can be directly sleeved on the end plate 20 to realize the connection between the shielding member 30 and the end plate 20, making the assembly simple and convenient, and conducive to improving the assembly efficiency.

[0043] It should be noted that for the convenience of description, the orientations such as "front-back direction", "left-right direction" and "up-down direction" in the present utility model are based on the orientation relationship shown in the drawings, rather than the orientation in the actual application process.

[0044] According to the housing assembly 100 of the embodiment of the present utility model, since the end plate 20 is located on the side of the electrode group 40 of the battery cell 200 facing the explosion-proof valve 11, the shielding member 30 is sleeved on the end plate 20 and is opposite to the explosion-proof valve 11, and the projections of the plurality of through holes 21 of the end plate 20 towards the shielding member 30 all fall within the contour of the shielding member 30, the shielding member 30 can block the electrolyte, preventing the electrolyte from directly impacting the explosion-proof valve 11 and easily damaging the explosion-proof valve 11, ensuring the normal use of the battery cell 200, and the connection between the shielding member 30 and the end plate 20 is convenient and simple, which is conducive to improving the assembly efficiency.

[0045] In some embodiments of the present utility model, as Figures 2 - 7 shown, the shielding member 30 includes a shielding portion 32. The shielding portion 32 is located on one side in the thickness direction of the end plate 20 (for example, Figure 1 the left - right direction shown in the figure), and the shielding portion 32 faces the explosion - proof valve 11, so that the shielding portion 32 can block the electrolyte, effectively preventing the electrolyte from directly impacting on the explosion - proof valve 11 and easily causing damage to the explosion - proof valve 11, ensuring the normal use of the battery cell 200.

[0046] In addition, as Figures 2 - 7 shown, the shielding member 30 further includes clamping portions 33. Clamping portions 33 are provided at both ends of the shielding portion 32 in the width direction of the end plate 20 (for example, Figure 4 the front - back direction shown in the figure). The end plate 20 is located between the two clamping portions 33, and one ends of the two clamping portions 33 away from the shielding portion 32 (for example, Figure 2 the right end shown in the figure) are bent towards each other, and both clamping portions 33 are in contact with the end plate 20. Thus, the end plate 20 can be clamped by the two clamping portions 33, preventing the shielding member 30 from falling off the end plate 20, ensuring that the shielding member 30 is reliably fixed on the end plate 20, thereby ensuring that the shielding portion 32 reliably blocks the electrolyte. At the same time, the structure of the shielding member 30 is simple, facilitating processing and manufacturing, and is beneficial to reducing production costs.

[0047] In some embodiments, the mating surface between the shielding member 30 and the end plate 20 can be a profiling fit, that is, the side of the shielding portion 32 facing the end plate 20 is in profiling fit with the end plate 20, and the side of the clamping portion 33 facing the end plate 20 is in profiling fit with the end plate 20, which can meet the requirement of the contact area needed between the shielding member 30 and the end plate 20, ensuring that the shielding member 30 is reliably clamped on the end plate 20.

[0048] In some embodiments, the shielding member 30 is sleeved on the end plate 20. It can be that the shielding member 30 is inserted into one end along the length direction of the end plate 20 and moved to a position opposite to the through - hole 21, or it can be that one clamping portion 33 is abutted against one end in the width direction of the end plate 20, and then the other clamping portion 33 is snapped into and abutted against the other end in the width direction of the end plate 20. Both can achieve sleeving the shielding member 30 on the end plate 20, and can be assembled according to the actual situation to meet different assembly requirements.

[0049] In some embodiments of the present utility model, as Figures 2 - 6 shown, the end plate 20 includes an avoidance portion 22 and a circulation portion 23. An avoidance hole 221 is provided on the avoidance portion 22. Through the avoidance hole 221, space can be provided for other components (such as ear tabs, etc.) inside the battery cell 200, avoiding structural interference. In addition, the circulation portion 23 and the avoidance portion 22 are in the length direction (for example, Figure 1One end of the vertical direction shown in the figure) is connected. A plurality of through holes 21 are provided on the flow-through portion 23. The shielding member 30 is sleeved on the flow-through portion 23, which can meet the setting requirements of the through holes 21, facilitate the sleeving of the shielding member 30 on the end plate 20, is conducive to improving the assembly efficiency, and makes the structure of the end plate 20 simple and convenient for processing and manufacturing.

[0050] According to some embodiments of the present invention, such as Figures 1 - 5 As shown, a groove 231 is formed on the side of the flow-through portion 23 facing the explosion-proof valve 11 (for example Figure 1 The left side shown in the figure). A plurality of through holes 21 are provided on the bottom wall of the groove 231, which can enhance the structural strength at the through holes 21, avoid problems such as damage to the flow-through portion 23, and when the battery cell 200 undergoes thermal runaway, the electrolyte flowing out of the plurality of through holes 21 can be guided through the wall of the groove 231, facilitating the electrolyte to flow towards the explosion-proof valve 11, ensuring reliable exhaust of the battery cell 200 and ensuring the use safety. At the same time, the shielding portion 32 is located on the side of the groove 231 close to the explosion-proof valve 11, which is convenient for the shielding member 30 to block the electrolyte flowing out of the plurality of through holes 21 and prevent the electrolyte from directly impacting on the explosion-proof valve 11 and easily causing damage to the explosion-proof valve 11, ensuring the normal use of the battery cell 200.

[0051] In some embodiments of the present invention, such as Figures 1 - 5 As shown, reinforcing ribs 232 are provided in the groove 231. The reinforcing ribs 232 extend along the length direction or width direction of the end plate 20 (for example Figure 4 The front-back direction shown in the figure), and the structural strength inside the groove 231 can be improved through the reinforcing ribs 232 to avoid problems such as deformation of the groove 231. In addition, the shielding member 30 is connected to the reinforcing ribs 232, making the shielding member 30 fixed reliably in the groove 231, and the reinforcing ribs 232 can support the shielding member 30 to avoid problems such as deformation of the shielding member 30.

[0052] According to some embodiments of the present invention, the bottom wall of the groove 231 and the side of the shielding portion 32 facing the through holes 21 (for example Figure 1The distance between the right side shown in [Figure] and the like is 0.5 mm - 10 mm. Thus, when thermal runaway occurs in the battery cell 200, it is convenient for gas to flow from the through hole 21 to the shielding portion 32 and then be discharged from the explosion-proof valve 11, avoiding the shielding portion 32 from blocking the exhaust, meeting the exhaust requirements of the battery cell 200, and avoiding the problem of large occupied space of the housing assembly 100 caused by the long distance between the bottom wall of the groove 231 and the side of the shielding portion 32 facing the through hole 21, thereby reducing the occupied space of the battery cell 200. For example, in some specific embodiments, the distance between the bottom wall of the groove 231 and the side of the shielding portion 32 facing the through hole 21 can be 0.5 mm, 2 mm, 4 mm, 6 mm, 8 mm, 10 mm, etc.

[0053] In some embodiments of the present utility model, as Figures 1 - 6 shown, the avoidance portion 22 includes a body portion 222 and a limiting portion 223. One end of the body portion 222 in the length direction (such as Figure 1 the up-and-down direction shown in [Figure]) is connected to the flow-through portion 23, enabling the connection between the avoidance portion 22 and the flow-through portion 23.

[0054] In addition, as Figures 2 - 6 shown, an avoidance hole 221 is provided on the body portion 222. The avoidance hole 221 extends along the length direction of the body portion 222. The limiting portion 223 is located in the avoidance hole 221 and extends along the length direction of the body portion 222. In the direction from the electrode group 40 to the explosion-proof valve 11 (such as Figure 1 the direction from right to left shown in [Figure]), the limiting portion 223 extends obliquely towards the direction close to the explosion-proof valve 11. Thus, when other components (such as electrode tabs) are inserted into the avoidance hole 221, the limiting portion 223 can guide the assembly of other components, facilitating accurate positioning, reducing the assembly difficulty, being beneficial to improving the assembly efficiency, and ensuring reliable limitation of other structures.

[0055] According to some embodiments of the present utility model, the included angle between the limiting portion 223 and the arrangement direction of the electrode group 40 and the explosion-proof valve 11 (such as Figure 1 the left-right direction shown in [Figure]) is 30° - 85°, which can ensure the limitation of other components by the limiting portion 223 while avoiding the problem of difficult assembly caused by too large an angle, and facilitating the processing and manufacturing of the end plate 20, being beneficial to reducing the production cost. For example, in some specific embodiments, the included angle between the limiting portion 223 and the arrangement direction of the electrode group 40 and the explosion-proof valve 11 can be 30°, 40°, 50°, 60°, 70°, 80°, 85°, etc.

[0056] In some embodiments of the present utility model, as Figure 7As shown, the thickness of the shielding member 30 is 0.1 mm - 2 mm, that is, the thickness of the shielding member 30 is w and satisfies 0.1 mm ≤ w ≤ 2 mm. Thus, the shielding member 30 can have sufficient strength and stiffness to avoid problems such as deformation of the shielding member 30, and can reduce the processing difficulty. At the same time, it can avoid problems such as increasing weight and cost due to the excessive thickness of the shielding member 30. For example, in some specific embodiments, the thickness of the shielding member 30 can be 0.1 mm, 0.5 mm, 1 mm, 1.3 mm, 1.5 mm, 1.8 mm, 2 mm, etc.

[0057] In some embodiments, the wall thickness of the shielding member 30 can be equal, or the wall thickness of the shielding member 30 can be unequal, and both can be set according to the actual situation to meet different usage requirements.

[0058] In some embodiments, as Figures 2 - 6 shown, the shielding member 30 can include a plurality of sub - shielding members 34. The plurality of sub - shielding members 34 are arranged at intervals along the length direction of the end plate 20. The projections of the plurality of through - holes 21 towards the sub - shielding members 34 fall within the contours of the plurality of sub - shielding members 34, so that the plurality of shielding members 30 can block the electrolyte, effectively preventing the electrolyte from directly impacting the explosion - proof valve 11 and easily causing damage to the explosion - proof valve 11, ensuring the normal use of the battery cell 200, and making the setting of the shielding member 30 more flexible to meet different usage requirements.

[0059] In the embodiments of the present utility model, the number of the sub - shielding members 34 can be flexibly set according to the actual situation. For example, the number of the sub - shielding members 34 can be Figure 2 three as shown, or two, four, five, six or more, which are all within the protection scope of the present utility model.

[0060] In some embodiments of the present utility model, the shielding member 30 can be an epoxy resin part, a metal part or a plastic part. The epoxy resin part has good insulation and corrosion resistance. The metal part has high strength and stiffness. The plastic part has the advantages of light weight and low cost, and all can meet the blocking requirements of the shielding member 30 for the electrolyte, and can be selected according to the actual situation to meet different usage requirements.

[0061] In some embodiments, the shielding member 30 can be a polypropylene (PP) part. The PP part has high heat resistance and corrosion resistance, which is beneficial to extending the service life of the shielding member 30 and is convenient for processing and forming.

[0062] In some embodiments, the shielding member 30 may be a polyethylene terephthalate (PET) member. The PET member has good heat resistance for stability, which is beneficial to extending the service life of the shielding member 30.

[0063] In some embodiments, the shielding member 30 may be a polyethylene (PE) member. The PE member has good toughness and flexibility, and has good low-temperature resistance and stability, which is beneficial to extending the service life of the shielding member 30.

[0064] In some embodiments, as Figure 1 shown, the housing assembly 100 further includes an insulating member 50. The insulating member 50 is disposed between the housing body 10 and the end plate 20. By means of the insulating member 50, the insulation effect between the housing body 10 and the electrode group 40 can be increased, and problems such as short circuit of the battery cell 200 caused by the energization of the housing body 10 can be avoided.

[0065] In addition, the insulating member 50 is provided with a through hole. The through hole is opposite to the explosion-proof valve 11. The shielding member 30 is located on the side of the through hole away from the explosion-proof valve 11 (for example Figure 1 the right side shown in). When the battery cell 200 undergoes thermal runaway, the gas in the housing assembly 100 can flow from the through hole to the explosion-proof valve 11 through the through hole 21 and be discharged from the battery cell 200, avoiding the insulating member 50 from blocking the exhaust gas and ensuring the safety of the battery cell 200. For example, the insulating member 50 is a plastic member.

[0066] The battery cell 200 according to an embodiment of the present invention includes the housing assembly 100 according to an embodiment of the present invention. Since the housing assembly 100 according to an embodiment of the present invention has the above-mentioned beneficial technical effects, for the battery cell 200 according to an embodiment of the present invention, the end plate 20 is located on the side of the electrode group 40 of the battery cell 200 facing the explosion-proof valve 11. The shielding member 30 is sleeved on the end plate 20 and is opposite to the explosion-proof valve 11. The projections of the plurality of through holes 21 of the end plate 20 towards the shielding member 30 all fall within the contour of the shielding member 30, so that the shielding member 30 can block the electrolyte and prevent the electrolyte from directly impacting on the explosion-proof valve 11 and easily damaging the explosion-proof valve 11, ensuring the normal use of the battery cell 200, and the connection between the shielding member 30 and the end plate 20 is convenient and simple, which is beneficial to improving the assembly efficiency.

[0067] The other constitutions and operations of the housing assembly 100 and the battery cell 200 according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0068] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0069] In the description of this specification, the descriptions referring to terms such as "embodiment", "specific embodiment", "example", etc. mean 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 utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0070] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A housing assembly, characterized in that: For battery cells, and comprising: A shell body, wherein the shell body is provided with an explosion-proof valve; An end plate, the end plate is arranged in the shell body and is located on a side of the electrode group of the battery cell facing the explosion-proof valve, and the end plate is provided with a plurality of through holes opposite to the explosion-proof valve; A shielding member is sleeved on the end plate and is opposite to the explosion-proof valve, and projections of the plurality of through holes toward the shielding member all fall within the contour of the shielding member.

2. The housing assembly according to claim 1, characterized in that: The shielding member comprises: a shielding portion, the shielding portion being located at one side of the end plate in the thickness direction and opposite to the explosion-proof valve; A clamping part is provided at both ends of the shielding part along the width direction of the end plate, the end plate is located between the two clamping parts, and the ends of the two clamping parts away from the shielding part are bent toward each other and abut against the end plate.

3. The housing assembly according to claim 2, characterized in that: The end plate comprises: An avoidance portion, wherein the avoidance portion is provided with an avoidance hole; The circulation part is connected to one end of the avoidance part in the length direction, a plurality of through holes are arranged on the circulation part, and the shielding member is sleeved on the circulation part.

4. The housing assembly according to claim 3, characterized in that: A groove is formed on the side of the circulation portion facing the explosion-proof valve, a plurality of through holes are arranged on the bottom wall of the groove, and the shielding portion is located on the side of the groove close to the explosion-proof valve.

5. The housing assembly according to claim 4, characterized in that: A reinforcing rib is arranged in the groove, and the reinforcing rib extends along the length direction or the width direction of the end plate.

6. The housing assembly according to claim 4, characterized in that: The distance between the bottom wall of the groove and the side of the shielding portion facing the through hole is 0.5 mm-10 mm.

7. The housing assembly according to claim 1, characterized in that: The thickness of the shielding member is 0.1 mm-2 mm.

8. The housing assembly according to claim 1, characterized in that: The shielding member includes a plurality of sub-shielding members, and the plurality of sub-shielding members are arranged at intervals along the length direction of the end plate, and the projections of the plurality of through holes toward the sub-shielding members fall within the contours of the plurality of sub-shielding members.

9. The housing assembly according to claim 1, characterized in that: The shielding member is an epoxy resin member, a metal member or a plastic member.

10. A battery cell, characterized in that: The invention comprises a housing assembly according to any one of claims 1 to 9.

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