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; the shielding piece is arranged between the pole group and the anti-explosion valve and is opposite to the anti-explosion valve, the projections, facing the shielding piece, of the multiple through holes all fall into the outline of the shielding piece, an exhaust groove used for exhausting is formed in the shielding piece, and the shielding piece and the end plate are an integrated piece. According to the shell assembly, the explosion-proof valve can be prevented from being damaged easily due to the fact that electrolyte directly impacts on the explosion-proof valve, reliable exhaust is ensured, and the production efficiency is high.

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, which is likely to damage the explosion-proof valve and lead to problems such as leakage of the battery cell, and is also likely to cause 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, which can prevent the electrolyte from directly impacting on the explosion-proof valve and causing damage to the explosion-proof valve, ensure reliable exhaust, and has high production 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, which is arranged in 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, which is arranged between the electrode group and the explosion-proof valve and opposite to the explosion-proof valve, and the projections of the plurality of through holes towards the shielding member all fall within the contour of the shielding member, and an exhaust groove for exhausting gas is formed on the shielding member, wherein the shielding member and the end plate are an integral part.

[0006] The housing assembly according to an embodiment of the utility model, by arranging the end plate on the side of the electrode group of the battery cell facing the explosion-proof valve, arranging the shielding member between the electrode group and the explosion-proof valve and opposite to the explosion-proof valve, and the projections of the plurality of through holes on the end plate towards the shielding member all fall within the contour of the shielding member, enables the shielding member to block the electrolyte, prevents the electrolyte from directly impacting on the explosion-proof valve and causing damage to the explosion-proof valve, ensures the normal use of the battery cell, and an exhaust groove for exhausting gas is formed on the shielding member, which can prevent the shielding member from completely blocking the explosion-proof valve and affecting the exhaust of the explosion-proof valve, and ensures reliable exhaust of the battery cell. At the same time, the shielding member and the end plate are an integral part, which makes the connection strength between the shielding member and the end plate high, the manufacturing simple, reduces the assembly process, and is beneficial to improving the production 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 end plate of the housing assembly includes: an avoidance portion, on which an avoidance hole is provided; a circulation portion, which is connected to one end of the avoidance portion in the length direction, a plurality of through holes are provided on the circulation portion, and the shielding member is connected to the circulation portion.

[0009] 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 member is located in the groove.

[0010] According to some embodiments of the present utility model, reinforcing ribs are provided in the groove, the reinforcing ribs extend along the length direction or the width direction of the end plate, and the shielding member is connected to the reinforcing ribs.

[0011] According to some embodiments of the present utility model, the distance between the bottom wall of the groove and the side of the shielding member facing the through hole is 0.5 mm - 10 mm.

[0012] According to some embodiments of the present utility model, the avoidance portion includes: a body portion, one end of the body portion in the length direction is connected to the circulation portion, and the avoidance hole extending along the length direction of the body portion is provided on the body portion; a limiting portion, which is located in the avoidance hole and extends along the length direction of the body portion, and in the direction from the electrode group to the explosion-proof valve, the limiting portion extends obliquely towards the direction close to the explosion-proof valve.

[0013] According to some embodiments of the present utility model, the included angle between the limiting portion and the arrangement direction of the electrode group and the explosion-proof valve is 30° - 85°.

[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 and / or the width direction of the end plate, and the projections of the plurality of through holes towards the sub-shielding members fall within the outlines 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] The battery cell according to an embodiment of the present utility model includes the housing assembly according to the embodiment of the present utility model.

[0017] According to the battery cell of the embodiment of the present invention, 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 arranged between the electrode group and the explosion-proof valve and opposite to the explosion-proof valve, and the projections of the plurality of through holes of the end plate towards 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 causing damage to the explosion-proof valve, ensuring the normal use of the battery cell. Moreover, an exhaust groove for exhausting gas is formed on the shielding member, which can prevent the shielding member from completely blocking the explosion-proof valve and affecting the exhaust of the explosion-proof valve, ensuring reliable exhaust of the battery cell. At the same time, the shielding member and the end plate are an integral part, which makes the connection strength between the shielding member and the end plate high, the manufacturing simple, and reduces the assembly process, which is beneficial to improving the production efficiency.

[0018] Additional aspects and advantages of the present invention 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 invention. Description of the Drawings

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

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

[0021] Figure 2 is an exploded view of the end plate and the shielding member according to the embodiment of the present invention;

[0022] Figure 3 is a schematic structural view of the cooperation between the end plate and the shielding member according to the embodiment of the present invention;

[0023] Figure 4 is a left view of the cooperation between the end plate and the shielding member according to the embodiment of the present invention;

[0024] Figure 5 is Figure 4 a cross-sectional view taken along the direction shown by the line A-A;

[0025] Figure 6 is a rear view of the cooperation between the end plate and the shielding member according to the embodiment of the present invention;

[0026] Figure 7 is a schematic structural view of the end plate according to the embodiment of the present invention;

[0027] Figure 8 is a right view of the end plate according to the embodiment of the present invention.

[0028] Reference Signs:

[0029] 100, housing assembly; 200, battery cell;

[0030] 10. Housing body; 11. Explosion-proof valve;

[0031] 20. End plate; 21. Through hole; 22. Avoidance portion; 23. Flow-through portion; 221. Avoidance hole; 222. Body portion; 223. Limiting portion; 231. Groove; 232. Reinforcing rib;

[0032] 30. Shielding member; 31. Exhaust groove;

[0033] 40. Electrode group;

[0034] 50. Insulating member. Specific embodiments

[0035] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein 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 drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0036] In the description of the present invention, 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 drawings, and are only for the convenience of describing the present invention 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 to the present invention.

[0037] In the description of the present invention, 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 another feature therebetween. The first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0038] The housing assembly 100 according to an embodiment of the present invention will be described below with reference to the drawings.

[0039] Refer to Figure 1As shown, the housing assembly 100 according to an embodiment of the present utility model is used for a battery cell 200, and the housing assembly 100 may include: a housing body 10 and an end plate 20. Among them, the battery cell 200 may be a blade battery.

[0040] 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 one 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 the figure). The housing body 10 can protect the electrode group 40 to prevent the electrode group 40 from being exposed and damaged. At the same time, the end plate 20 can support and insulate the electrode group 40, meet the support and insulation requirements of the electrode group 40, and can prevent the electrode group 40 from contacting the explosion-proof valve 11 and causing potential safety hazards, etc., to ensure the safety of the battery cell 200.

[0041] As Figure 2 、 Figure 7 and Figure 8 shown, a plurality of (greater than or equal to two) through holes 21 are provided on the end plate 20, and 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 to achieve pressure relief and exhaust, release the internal pressure of the battery cell 200, and ensure the use safety of the battery cell 200.

[0042] 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 causing damage to the explosion-proof valve and resulting in 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.

[0043] Therefore, in the present utility model, as Figures 1 - 5As shown, the housing assembly 100 further includes a shielding member 30. The shielding member 30 is disposed between the electrode group 40 and the explosion-proof valve 11, and the shielding member 30 faces the explosion-proof valve 11. The projections of the multiple 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 shielding member 30 can block the electrolyte. For example, the shielding member 30 can block the electrolyte flowing from the multiple through holes 21 to the explosion-proof valve 11 or prevent the electrolyte from flowing towards the multiple through holes 21, preventing the electrolyte from directly impacting the explosion-proof valve 11 and easily causing damage to the explosion-proof valve 11, thereby avoiding problems such as 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. In addition, an exhaust groove 31 is formed on the shielding member 30. Through the exhaust groove 31, it can be avoided that the shielding member 30 completely blocks the explosion-proof valve 11 and affects the exhaust of the explosion-proof valve 11. When the battery cell 200 undergoes thermal runaway, it ensures reliable exhaust of the battery cell 200 and ensures the use safety.

[0044] At the same time, the shielding member 30 and the end plate 20 are an integral part, making the connection strength between the shielding member 30 and the end plate 20 high, the manufacturing simple, and reducing the assembly process, which is beneficial to improving the production efficiency.

[0045] In the embodiment of the present utility model, the specific structure of the shielding member 30 can be set according to the actual situation. For example, the shielding member 30 can be formed into a square shape, a cross shape, an I shape, a circular shape, a racetrack shape, etc., all of which can achieve the shielding of the through holes 21 and prevent the electrolyte from directly impacting the explosion-proof valve 11 and easily causing damage to the explosion-proof valve 11.

[0046] 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 limitations in the actual application process.

[0047] In some embodiments, the shielding member 30 and the end plate 20 can be integrally injection molded, making the combination between the shielding member 30 and the end plate 20 closer, improving the strength and reliability of the overall structure, and being beneficial to improving the production efficiency.

[0048] According to the housing assembly 100 of the embodiment of the present utility model, 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 arranged between the electrode group 40 and the explosion-proof valve 11 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, 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 causing damage to the explosion-proof valve 11, ensuring the normal use of the battery cell 200. Moreover, an exhaust groove 31 for exhausting gas is formed on the shielding member 30, which can prevent the shielding member 30 from completely blocking the explosion-proof valve 11 and affecting the exhaust of the explosion-proof valve 11, ensuring reliable exhaust of the battery cell 200. At the same time, the shielding member 30 and the end plate 20 are an integral part, so that the connection strength between the shielding member 30 and the end plate 20 is high, the manufacturing is simple, and the assembly process is reduced, which is beneficial to improving production efficiency.

[0049] In some embodiments of the present utility model, as Figures 2 - 8 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, and through the avoidance hole 221, space can be provided for other components (such as electrode tabs, etc.) inside the battery cell 200 to avoid structural interference. In addition, the circulation portion 23 is connected to one end of the avoidance portion 22 in the length direction (such as Figure 1 the up and down direction shown in

[0050] According to some embodiments of the present utility model, as Figures 1 - 5 shown, on the side of the circulation portion 23 facing the explosion-proof valve 11 (such as Figure 1 the left side shown in

[0051] ), a groove 231 is formed, and a plurality of through holes 21 are arranged on the bottom wall of the groove 231, which can enhance the structural strength at the through holes 21 and avoid problems such as damage to the circulation portion 23. Moreover, when the battery cell 200 undergoes thermal runaway, the electrolyte flowing out from the plurality of through holes 21 can be guided through the groove 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 use safety. Figure 1 、 Figure 3 and Figure 5 shown, the shielding member 30 is located in the groove 231, and the groove 231 can provide a stable installation space for the shielding member 30, ensuring reliable fixation of the shielding member 30 on the circulation portion 23, and facilitating the shielding member 30 to block the electrolyte flowing out from the plurality of through holes 21 to 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.

[0052] In some embodiments of the present utility model, as Figures 1 - 4 shown, reinforcing ribs 232 are provided in the groove 231. The reinforcing ribs 232 extend along the length direction or the width direction of the end plate 20 (for example, Figure 3 the front-back direction shown in [[ ]]). Through the reinforcing ribs 232, the structural strength inside the groove 231 can be improved, and problems such as deformation of the groove 231 can be avoided. In addition, the shielding member 30 is connected to the reinforcing ribs 232, so that the shielding member 30 is fixedly reliable 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.

[0053] According to some embodiments of the present utility model, as Figure 5 shown, the distance between the bottom wall of the groove 231 and the side of the shielding member 30 facing the through hole 21 (for example, Figure 1 the right side shown in [[ ]]) is 0.5 mm - 10 mm, that is, the distance between the bottom wall of the groove 231 and the side of the shielding member 30 facing the through hole 21 is h and satisfies 0.5 mm ≤ h ≤ 10 mm. Thus, when the battery cell 200 undergoes thermal runaway, it is convenient for gas to flow from the through hole 21 to the shielding member 30 and then be discharged from the explosion-proof valve 11, avoiding the shielding member 30 from blocking the exhaust, being able to meet the exhaust requirements of the battery cell 200, and being able to avoid the problem that the distance between the bottom wall of the groove 231 and the side of the shielding member 30 facing the through hole 21 is too long, resulting in a large occupied space of the housing assembly 100, thereby being able to reduce 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 member 30 facing the through hole 21 can be 0.5 mm, 2 mm, 4 mm, 6 mm, 8 mm, 10 mm, etc.

[0054] In some embodiments of the present utility model, as Figures 2 - 4 , Figure 7 and Figure 8 shown, the avoidance portion 22 includes a main body portion 222 and a limiting portion 223. One end of the main body portion 222 in the length direction (for example, Figure 1 the up-down direction shown in [[ ]]) is connected to the flow-through portion 23, and the connection between the avoidance portion 22 and the flow-through portion 23 can be realized.

[0055] In addition, as Figure 2 , Figure 3 and Figure 7 shown, an avoidance hole 221 is provided on the main body portion 222. The avoidance hole 221 extends along the length direction of the main body portion 222. The limiting portion 223 is located in the avoidance hole 221, and the limiting portion 223 extends along the length direction of the main body portion 222. In the direction from the electrode group 40 to the explosion-proof valve 11 (for example, Figure 1In the direction from right to left in the figure, the limiting portion 223 extends obliquely towards the direction close to the explosion-proof valve 11. Thus, when other components (such as tab ears) 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 conducive to improving the assembly efficiency, and ensuring reliable limitation of other structures.

[0056] According to some embodiments of the present invention, 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 the figure) is 30° - 85°. This can ensure that the limiting portion 223 limits other components while avoiding the problem of difficult assembly caused by too large an angle, and is convenient for manufacturing the end plate 20, being conducive to reducing production costs. 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.

[0057] In some embodiments, the shielding member 30 may include a plurality of (greater than or equal to two) sub-shielding members, and the plurality of sub-shielding members are arranged at intervals along the length direction and / or width direction of the end plate 20. That is, the plurality of sub-shielding members can be arranged at intervals along the length direction of the end plate 20 (such as Figure 1 the up-down direction shown in the figure), or the plurality of sub-shielding members can be arranged at intervals along the width direction of the end plate 20 (such as Figure 1 the front-back direction shown in the figure), or the plurality of sub-shielding members can be arranged at intervals along the length direction and width direction of the end plate 20, and the projections of the plurality of through holes 21 towards the sub-shielding members fall within the contours of the plurality of sub-shielding members, so that the plurality of shielding members 30 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, and making the setting of the shielding member 30 more flexible, capable of meeting different use requirements.

[0058] In some embodiments of the present invention, 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, and the plastic part has advantages such as light weight and low cost, and all can meet the requirement of the shielding member 30 for blocking the electrolyte, and can be selected according to the actual situation to meet different use requirements.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] In addition, the insulating member 50 is provided with a through hole, and 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 and ensuring the safety of the battery cell 200. For example, the insulating member 50 is a plastic member.

[0064] 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, the battery cell 200 according to an embodiment of the present invention, through 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 disposed between the electrode group 40 and the explosion-proof valve 11 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, 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 causing damage to the explosion-proof valve 11, ensuring the normal use of the battery cell 200, and an exhaust groove 31 for exhausting gas is formed on the shielding member 30, which can avoid the shielding member 30 completely blocking the explosion-proof valve 11 and affecting the exhaust of the explosion-proof valve 11, ensuring reliable exhaust of the battery cell 200. At the same time, the shielding member 30 and the end plate 20 are an integral part, so that the connection strength between the shielding member 30 and the end plate 20 is high, the manufacturing is simple, and the assembly process is reduced, which is beneficial to improving the production efficiency.

[0065] The other constitutions and operations of the housing assembly 100 and the battery cell 200 according to the embodiments of the present utility model are known to those of ordinary skill in the art and will not be described in detail here.

[0066] 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 can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. 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.

[0067] In the description of this specification, the descriptions referring to the terms "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 representations 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.

[0068] 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 a battery cell, and comprising: A housing body, on which an explosion-proof valve is provided; An end plate, which is arranged inside the housing body and on one 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, which is arranged between the electrode group and the explosion-proof valve and opposite to the explosion-proof valve, and the projections of the plurality of through holes towards the shielding member all fall within the contour of the shielding member. An exhaust groove for exhausting gas is formed on the shielding member; Wherein, the shielding member and the end plate are an integral part.

2. The housing assembly according to claim 1, wherein The end plate includes: An avoidance portion, on which an avoidance hole is provided; A circulation portion, which is connected to one end of the avoidance portion in the length direction. A plurality of the through holes are provided on the circulation portion, and the shielding member is connected to the circulation portion.

3. The housing assembly according to claim 2, wherein, A groove is formed on one side of the circulation portion facing the explosion-proof valve, and a plurality of the through holes are provided on the bottom wall of the groove, and the shielding member is located in the groove.

4. The housing assembly according to claim 3, wherein, Reinforcing ribs are provided in the groove, and the reinforcing ribs extend along the length direction or the width direction of the end plate, and the shielding member is connected to the reinforcing ribs.

5. The housing assembly according to claim 3, wherein, The distance between the bottom wall of the groove and the side of the shielding member facing the through hole is 0.5 mm - 10 mm.

6. The housing assembly according to claim 2, wherein, The avoidance portion includes: A body portion, one end of the body portion in the length direction is connected to the circulation portion, and the avoidance hole extending along the length direction of the body portion is provided on the body portion; A limiting portion, which is located in the avoidance hole and extends along the length direction of the body portion. In the direction from the electrode group to the explosion-proof valve, the limiting portion extends obliquely towards the direction close to the explosion-proof valve.

7. The housing assembly according to claim 6, wherein, The included angle between the limiting portion and the arrangement direction of the electrode group and the explosion-proof valve is 30° - 85°.

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 and / or the width direction of the end plate, and the projections of the plurality of through holes towards the sub-shielding members fall within the contours of the plurality of sub-shielding members.

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

10. A battery cell, characterized in that, Comprising the housing assembly according to any one of claims 1 - 9.

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