Shell assembly and battery cell

Abstract

The utility model discloses a shell assembly and a single battery, which are used for the single battery and comprise a shell body, a shell cover and a shell cover, and an anti-explosion valve of the single battery is arranged on the shell body; the end plate is arranged in the shell body and located on one side, facing the anti-explosion valve, of the pole group of the battery monomer, a groove is formed in one side of the end plate in the thickness direction, the groove is opposite to the anti-explosion valve, and a plurality of through holes are formed in the bottom wall of the groove; and the shielding piece is located in the groove and connected with the groove side wall of the groove in a clamped mode, 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 shielding piece can block the electrolyte, so that the electrolyte is prevented from directly impacting on the anti-explosion valve to easily damage the anti-explosion valve, and the normal use of the single battery is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular 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 cause damage to 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 solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a housing assembly and a battery cell, and the shielding member of the housing assembly can block the electrolyte to 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.

[0004] The utility model also provides a battery cell, which includes the above-mentioned housing assembly.

[0005] The housing assembly according to an embodiment of the utility model is used for a battery cell, including a housing body, on which an explosion-proof valve of the battery cell is provided; an end plate, which is arranged inside the housing body and on the side of the electrode group of the battery cell facing the explosion-proof valve. A groove is formed on one side in the thickness direction of the end plate, and the groove faces the explosion-proof valve. A plurality of through holes are provided on the bottom wall of the groove; a shielding member, which is located in the groove and is clamped with the side wall of the groove, and the projections of the plurality of through holes towards the shielding member all fall within the contour of the shielding member.

[0006] For the housing assembly according to an embodiment of the utility model, an explosion-proof valve of the battery cell is provided on the housing body, the end plate is arranged inside the housing body and on the side of the electrode group of the battery cell facing the explosion-proof valve. A groove is formed on one side in the thickness direction of the end plate, and the groove faces the explosion-proof valve. A plurality of through holes are provided on the bottom wall of the groove. Since the shielding member is located in the groove and is clamped with the groove, the projections of the plurality of through holes towards the shielding member all fall within the contour of the shielding member, so that the shielding member can block the electrolyte to 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. At the same time, the shielding member is located in the groove and is clamped with the side wall of the groove, which not only ensures the connection strength between the shielding member and the end plate, but also facilitates the connection and disassembly of the shielding member and the end plate, facilitates the replacement of the shielding member, and has low assembly difficulty and improves the assembly efficiency.

[0007] In some embodiments of the utility model, the groove side wall has a first connecting portion, the shielding member includes a main body portion and a second connecting portion, the projections of the plurality of through holes toward the shielding member all fall within the contour of the main body portion, and the first connecting portion and the second connecting portion are snap-connected.

[0008] In some embodiments of the present invention, one of the first connecting portion and the second connecting portion is a card slot, and the other is a card protrusion, and a portion of the card protrusion is located in the card slot.

[0009] In some embodiments of the utility model, the first connecting portion is the card slot, the second connecting portion is the card protrusion, the card protrusion includes a connecting portion and a card connection portion, one end of the connecting portion is connected to the main body portion, and the other end extends along one end in the thickness direction of the shielding member, the card connection portion is connected to one end of the connecting portion away from the shielding member and is located in the card slot.

[0010] In some embodiments of the present invention, in a direction from one end of the connecting portion connected to the clamping portion to one end of the connecting portion connected to the main body portion, one end of the clamping portion toward the groove side wall is inclined toward the groove side wall.

[0011] In some embodiments of the present invention, the second connection parts are multiple and spaced apart along the circumferential direction of the main body, and the first connection parts are multiple and correspond one to one with the second connection parts.

[0012] In some embodiments of the present invention, the shielding member includes a plurality of sub-shields, and the plurality of sub-shields are arranged at intervals along the length direction and / or width direction of the end plate, and the projections of the plurality of through holes toward the sub-shields fall within the contours of the plurality of sub-shields; or, the shielding member is one.

[0013] In some embodiments of the present invention, at least a portion of the shielding member is spaced apart from the groove sidewall; and / or an exhaust groove for exhausting air is formed on the shielding member.

[0014] In some embodiments of the present invention, the shielding member is an epoxy resin member, a metal member or a plastic member.

[0015] A battery cell according to an embodiment of the present invention includes the above-mentioned housing assembly.

[0016] According to the battery cell of the embodiment of the present utility model, a housing assembly is provided. An explosion-proof valve of the battery cell is provided on the housing body. An end plate is arranged inside the housing body and on the side of the electrode group of the battery cell facing the explosion-proof valve. A groove is formed on one side in the thickness direction of the end plate. The groove faces the explosion-proof valve. A plurality of through holes are provided on the bottom wall of the groove. A shielding member is located in the groove and is snap-fitted with the groove. The projections of the plurality of through holes 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 the explosion-proof valve and easily causing damage to the explosion-proof valve, ensuring the normal use of the battery cell. At the same time, the shielding member is located in the groove and is snap-fitted with the side wall of the groove. While ensuring the connection strength between the shielding member and the end plate, it is convenient for the connection and disassembly of the shielding member and the end plate, convenient for the replacement of the shielding member, and has a low assembly difficulty, improving the assembly efficiency.

[0017] 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 understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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:

[0019] Figure 1 is a cross-sectional view of a partial structure of a battery cell according to an embodiment of the present utility model;

[0020] Figure 2 is Figure 1 an enlarged view of part A in

[0021] Figure 3 is a perspective view of an end plate and a shielding member according to an embodiment of the present utility model;

[0022] Figure 4 is a top view of an end plate and a shielding member according to an embodiment of the present utility model;

[0023] Figure 5 is along Figure 4 sectional view taken along line B-B in

[0024] Figure 6 is an exploded view of an end plate and a shielding member according to an embodiment of the present utility model;

[0025] Figure 7 is Figure 6 an enlarged view of part C in

[0026] Figure 8 is an exploded view of an end plate and a shielding member according to another embodiment of the present utility model;

[0027] Figure 9 is Figure 8Enlarged view of D in the middle;

[0028] Figure 10 It is a bottom view of the end plate and the shielding member according to an embodiment of the present utility model.

[0029] Reference numerals:

[0030] 1000, battery cell;

[0031] 100, housing assembly;

[0032] 1, housing body;

[0033] 2, end plate; 21, groove; 211, bottom wall of the groove; 2111, through hole; 212, side wall of the groove; 2121, first connecting portion; 213, sub-groove; 22, reinforcing rib;

[0034] 3, shielding member; 31, body portion; 32, second connecting portion; 321, connecting portion; 322, clamping portion; 33, sub-shielding member;

[0035] 4, insulating member; 41, avoidance hole;

[0036] 200, explosion-proof valve;

[0037] 300, electrode group;

[0038] 400, electrolyte. Detailed implementation manners

[0039] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the 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 drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0040] 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 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 to the present utility model. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0041] 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 a direct connection or an indirect connection through an intermediate medium, and it can 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.

[0042] The following describes a housing assembly 100 according to an embodiment of the present utility model with reference to the accompanying drawings.

[0043] As Figures 1 - 10 shown, the housing assembly 100 according to an embodiment of the present utility model is for a battery cell 1000 and includes a housing body 1, an end plate 2, and a shielding member 3. Among them, the battery cell 1000 can be a blade battery.

[0044] Specifically, an explosion-proof valve 200 of the battery cell 1000 is provided on the housing body 1. The end plate 2 is disposed inside the housing body 1, and the end plate 2 is located on the side of the electrode group 300 of the battery cell 1000 facing the explosion-proof valve 200. The housing body 1 can protect the electrode group 300 to prevent the electrode group 300 from being exposed and damaged. At the same time, the end plate 2 can support and insulate the electrode group 300, meet the support and insulation requirements of the electrode group 300, and can prevent the electrode group 300 from contacting the explosion-proof valve 200 and causing safety hazards and other problems, ensuring the safety of the battery cell 1000.

[0045] A groove 21 is formed on one side in the thickness direction of the end plate 2. The groove 21 is opposite to the explosion-proof valve 200. A plurality of (greater than or equal to two) through holes 2111 are provided on the bottom wall 211 of the groove 21, so that the plurality of through holes 2111 can communicate the electrode group 300 and the explosion-proof valve 200. When the battery cell 1000 undergoes thermal runaway, the gas inside the housing assembly 100 can smoothly pass through the plurality of through holes 2111 and rush out from the explosion-proof valve 200 to achieve pressure relief and exhaust, release the internal pressure of the battery cell 1000, and ensure the use safety of the battery cell 1000.

[0046] In the related art, when the battery cell 1000 is placed, if the explosion-proof valve 200 is located below the housing assembly 100, the electrolyte 400 inside the battery cell 1000 will accumulate in the groove 21. When the battery cell 1000 shakes, the electrolyte 400 will shake back and forth, causing the electrolyte 400 to continuously impact the explosion-proof valve 200, easily damaging the explosion-proof valve 200 and resulting in problems such as leakage of the battery cell 1000, and easily causing the explosion-proof valve 200 to open in advance, affecting the normal use of the battery cell 1000.

[0047] Therefore, in the present utility model, the housing assembly 100 further includes a shielding member 3, and the projections of the plurality of through holes 2111 towards the shielding member 3 all fall within the contour of the shielding member 3. Thus, when the battery cell 1000 vibrates, the electrolyte 400 can be blocked by the shielding member 3. For example, the shielding member 3 can block the electrolyte 400 flowing from the plurality of through holes 2111 to the explosion-proof valve 200 or prevent the electrolyte 400 from flowing to the plurality of through holes 2111, preventing the electrolyte 400 from directly impacting on the explosion-proof valve 200 and easily causing damage to the explosion-proof valve 200, thereby avoiding problems such as leakage of the battery cell 1000 and premature opening of the explosion-proof valve 200, and ensuring the normal use of the battery cell 1000. At the same time, the shielding member 3 is located in the groove 21 and is clamped with the groove side wall 212 of the groove 21. While ensuring the connection strength between the shielding member 3 and the end plate 2, it facilitates the connection and disassembly of the shielding member 3 and the end plate 2, and has a low assembly difficulty, improving the assembly efficiency.

[0048] In an embodiment of the present utility model, the specific structure of the shielding member 3 can be set according to actual situations. For example, the shielding member 3 can be formed into a square shape, a cross shape, an I-shaped shape, a circular shape, a racetrack shape, etc., all of which can achieve the shielding of the through holes 2111 and prevent the electrolyte 400 from directly impacting on the explosion-proof valve 200 and easily causing damage to the explosion-proof valve 200.

[0049] In addition, an exhaust structure is formed on the shielding member 3. Through the exhaust structure, it can be avoided that the shielding member 3 completely shields the explosion-proof valve 200 and affects the exhaust of the explosion-proof valve 200. When the battery cell 1000 undergoes thermal runaway, it ensures reliable exhaust of the battery cell 1000 and ensures the use safety.

[0050] According to the housing assembly 100 of the embodiment of the present utility model, an explosion-proof valve 200 of the battery cell 1000 is provided on the housing body 1, and the end plate 2 is disposed inside the housing body 1 and on the side of the electrode group 300 of the battery cell 1000 facing the explosion-proof valve 200. A groove 21 is formed on one side in the thickness direction of the end plate 2. The groove 21 is opposite to the explosion-proof valve 200. A plurality of through holes 2111 are provided on the groove bottom wall 211 of the groove 21. By the shielding member 3 being located in the groove 21 and clamped with the groove 21, the projections of the plurality of through holes 2111 towards the shielding member 3 all fall within the contour of the shielding member 3, enabling the shielding member 3 to block the electrolyte 400 and preventing the electrolyte 400 from directly impacting on the explosion-proof valve 200 and easily causing damage to the explosion-proof valve 200, ensuring the normal use of the battery cell 1000. At the same time, the shielding member 3 is located in the groove 21 and is clamped with the groove side wall 212 of the groove 21. While ensuring the connection strength between the shielding member 3 and the end plate 2, it facilitates the connection and disassembly of the shielding member 3 and the end plate 2, facilitates the replacement of the shielding member 3, and has a low assembly difficulty, improving the assembly efficiency.

[0051] In some embodiments of the present utility model, such as Figures 3 - 7As shown, the groove side wall 212 of the groove 21 has a first connecting portion 2121. The shielding member 3 includes a body portion 31 and a second connecting portion 32. The projections of the plurality of through holes 2111 toward the shielding member 3 all fall within the contour of the body portion 31, and the first connecting portion 2121 and the second connecting portion 32 are snap-connected.

[0052] Thus, the shielding member 3 is snap-connected to the groove side wall 212 of the groove 21 through the snap connection between the first connecting portion 2121 and the second connecting portion 32, realizing the fixation of the shielding member 3. At the same time, since the projections of the plurality of through holes 2111 toward the shielding member 3 all fall within the contour of the body portion 31, it is ensured that the shielding member 3 can block the electrolyte 400, preventing the electrolyte 400 from directly impacting the explosion-proof valve 200 and causing damage to the explosion-proof valve 200, and ensuring the normal use of the battery cell 1000.

[0053] In some embodiments of the present invention, as Figures 3 - 7 shown, one of the first connecting portion 2121 and the second connecting portion 32 is a card slot, and the other is a card projection. A part of the card projection is located within the card slot. Thus, the snap connection between the first connecting portion 2121 and the second connecting portion 32 is realized by the part of the card projection being located within the card slot, thereby realizing the snap connection between the shielding member 3 and the groove side wall 212 of the groove 21 and realizing the fixation of the shielding member 3. At the same time, during the assembly process, the user only needs to align the card projection part with the card slot and push it in to complete the connection, without complex operations or tools, and reduces the possibility of errors during the installation process, improving the assembly efficiency.

[0054] In some embodiments of the present invention, as Figure 5 and Figure 7 shown, the first connecting portion 2121 is a card slot, and the second connecting portion 32 is a card projection. The card projection includes a connecting portion 321 and a snap connection portion 322. One end of the connecting portion 321 is connected to the body portion 31, and the other end extends along one end in the thickness direction of the shielding member 3. The snap connection portion 322 is connected to the end of the connecting portion 321 facing away from the shielding member 3 and is located within the card slot.

[0055] Thus, the snap connection portion 322 is located within the card slot, realizing the snap connection between the first connecting portion 2121 and the second connecting portion 32, thereby realizing the snap connection between the shielding member 3 and the groove side wall 212 of the groove 21 and realizing the fixation of the shielding member 3. At the same time, by connecting one end of the connecting portion 321 to the body portion 31, and the other end extending along one end in the thickness direction of the shielding member 3 and connecting to the snap connection portion 322, it is ensured that the shielding member 3 is located within the groove 21, so that the groove 21 plays a certain protective role for the shielding member 3 and ensures the reliability of the connection between the shielding member 3 and the groove 21.

[0056] In some embodiments of the present invention, as Figure 5 and Figure 7As shown, in the direction from the end where the connecting portion 321 is connected to the latching portion 322 to the end where the connecting portion 321 is connected to the main body portion 31, the end of the latching portion 322 facing the groove side wall 212 is inclined towards the groove side wall 212. Thus, through such a setting, the end of the latching portion 322 facing the groove side wall 212 plays a certain guiding role, facilitating the insertion of the latching portion 322 into the card slot, further reducing the assembly difficulty and improving the assembly efficiency.

[0057] In some embodiments of the present utility model, as Figures 3 - 7 shown, the second connecting portions 32 are multiple spaced apart along the circumferential direction of the main body portion 31, and the first connecting portions 2121 are multiple corresponding one-to-one to the second connecting portions 32. Thus, through the latching connection between the multiple second connecting portions 32 and the multiple corresponding first connecting portions 2121, the connection strength between the shielding member 3 and the groove side wall 212 of the groove 21 is improved, further ensuring that the shielding member 3 prevents the electrolyte 400 from directly impacting on the explosion-proof valve 200 and easily causing damage to the explosion-proof valve 200, and further ensuring the normal use of the battery cell 1000.

[0058] In some embodiments of the present utility model, as Figure 8 and Figure 9 shown, the shielding member 3 includes multiple sub-shielding members 33, the multiple sub-shielding members 33 are spaced apart along the length direction and / or width direction of the end plate 2, and the projections of the multiple through holes 2111 towards the sub-shielding members 33 fall within the contours of the multiple sub-shielding members 33; or, as Figures 3 - 7 shown, the shielding member 3 is one.

[0059] It can be understood that when the shielding member 3 includes multiple sub-shielding members 33, the multiple sub-shielding members 33 are spaced apart along the length direction of the end plate 2, or, the multiple sub-shielding members 33 are spaced apart along the width direction of the end plate 2, or, the multiple sub-shielding members 33 are spaced apart along the length direction and width direction of the end plate 2; or, the shielding member 3 is one. Thus, through such a setting, various forms of the shielding member 3 are realized, so as to adapt to different models of battery cells 1000 and improve the versatility of the shielding member 3.

[0060] Meanwhile, when the shielding member 3 includes multiple sub-shielding members 33, the projections of the multiple through holes 2111 towards the sub-shielding members 33 fall within the contours of the multiple sub-shielding members 33, ensuring that the shielding member 3 prevents the electrolyte 400 from directly impacting on the explosion-proof valve 200 and easily causing damage to the explosion-proof valve 200, thereby ensuring the normal use of the battery cell 1000.

[0061] In some embodiments, as Figure 8 and Figure 9As shown, reinforcing ribs 22 are provided in the groove 21. The reinforcing ribs 22 divide the groove 21 into a plurality of sub-grooves 213 along the length direction and / or width direction of the end plate 2. A shielding member 3 is provided in the sub-groove 213 in which a through hole 2111 is provided in the bottom wall 211 of the sub-groove 213. The projection of the through hole 2111 towards the sub-shielding member 33 falls within the contour of the sub-shielding member 33. Thus, the structural strength of the groove 21 is effectively enhanced by the reinforcing ribs 22, and the overall structural strength of the end plate 2 is improved. At the same time, since the projection of the through hole 2111 towards the sub-shielding member 33 falls within the contour of the sub-shielding member 33, it is prevented that the electrolyte 400 directly impacts on the explosion-proof valve 200 and easily causes damage to the explosion-proof valve 200, thereby ensuring the normal use of the battery cell 1000.

[0062] In some embodiments of the present invention, as Figure 3 and Figure 4 shown, at least a part of the shielding member 3 is spaced apart from the groove side wall 212. Thus, by spacing at least a part of the shielding member 3 from the groove side wall 212 of the groove 21, it is avoided that the shielding member 3 completely shields the groove 21 and affects the exhaust of the explosion-proof valve 200. When the battery cell 1000 undergoes thermal runaway, the gas can smoothly exhaust through the gap between the shielding member 3 and the groove side wall 212, ensuring the use safety. Further, the body portion 31 is spaced apart from the groove side wall 212.

[0063] In some embodiments of the present invention, an exhaust groove for exhausting gas is formed on the shielding member 3. Thus, by the exhaust groove, it is avoided that the shielding member 3 completely shields the groove 21 and affects the exhaust of the explosion-proof valve 200. When the battery cell 1000 undergoes thermal runaway, the gas can smoothly exhaust through the exhaust groove, ensuring the use safety.

[0064] In some embodiments of the present invention, the shielding member 3 is an epoxy resin member, a metal member or a plastic member. Thus, by such a setting, the shielding member 3 can select different materials according to different battery cells 1000, improving the versatility of the shielding member 3.

[0065] In some embodiments, as Figure 1 and Figure 2 shown, the housing assembly 100 further includes an insulating member 4. The insulating member 4 is provided between the end plate 2 and the explosion-proof valve 200. The insulating member 4 can increase the insulation effect between the housing body 1 and the electrode group 300, avoiding causing a short circuit of the battery cell 1000. An avoidance hole 41 is provided on the insulating member 4. The avoidance hole 41 is correspondingly arranged with the explosion-proof valve 200. When thermal runaway occurs, the gas in the housing assembly 100 can first pass through the through hole 2111, then enter the groove 21, and then pass through the gap between the shielding member 3 and the groove side wall 212 or the exhaust groove formed on the shielding member 3 for exhausting gas, and then pass through the avoidance hole 41 on the insulating member 4, and finally break through the explosion-proof valve 200 to discharge from the battery cell 1000, increasing the thermal safety of the battery cell 1000.

[0066] In some embodiments of the present utility model, the end plate 2 is a plastic part, which has good insulation performance, and the plastic part can be processed by injection molding or other methods, and the manufacturing process of the end plate 2 is relatively simple.

[0067] The battery cell 1000 of the embodiments of the present utility model will be described below.

[0068] The battery cell 1000 according to the embodiments of the present utility model includes a housing assembly 100.

[0069] For the battery cell 1000 according to the embodiments of the present utility model, the housing assembly 100 is provided. An explosion-proof valve 200 of the battery cell 1000 is provided on the housing body 1. The end plate 2 is arranged inside the housing body 1 and on one side of the electrode group 300 of the battery cell 1000 facing the explosion-proof valve 200. A groove 21 is formed on one side in the thickness direction of the end plate 2. The groove 21 faces the explosion-proof valve 200. A plurality of through holes 2111 are provided on the bottom wall 211 of the groove 21. The shielding member 3 is located in the groove 21 and is clamped with the groove 21. The projections of the plurality of through holes 2111 facing the shielding member 3 all fall within the contour of the shielding member 3, so that the shielding member 3 can block the electrolyte 400 and prevent the electrolyte 400 from directly impacting on the explosion-proof valve 200, which may easily cause damage to the explosion-proof valve 200, ensuring the normal use of the battery cell 1000. At the same time, the shielding member 3 is located in the groove 21 and is clamped with the groove side wall 212 of the groove 21. While ensuring the connection strength between the shielding member 3 and the end plate 2, it is convenient for the connection and disassembly of the shielding member 3 and the end plate 2, convenient for the replacement of the shielding member 3, and has low assembly difficulty and improves the assembly efficiency.

[0070] For other components and operations of the housing assembly 100 and the battery cell 1000 according to the embodiments of the present utility model, they are known to those of ordinary skill in the art and will not be described in detail here.

[0071] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" etc. 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 utility model. In this specification, the schematic descriptions 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.

[0072] 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 of the battery cell; An end plate, the end plate is arranged in the shell body and is located on the side of the pole group of the battery cell facing the explosion-proof valve, a groove is formed on one side of the end plate in the thickness direction, the groove is opposite to the explosion-proof valve, and a plurality of through holes are provided on the bottom wall of the groove; The shielding member is located in the groove and is engaged with the groove side wall of the groove, and the 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, wherein, The groove side wall has a first connecting portion, the shielding member includes a main body and a second connecting portion, the projections of the plurality of through holes toward the shielding member all fall within the contour of the main body, and the first connecting portion and the second connecting portion are snap-connected.

3. The housing assembly according to claim 2, wherein, One of the first connection part and the second connection part is a card slot, and the other is a card protrusion, and a part of the card protrusion is located in the card slot.

4. The housing assembly according to claim 3, wherein, The first connecting portion is the card slot, the second connecting portion is the card protrusion, the card protrusion includes a connecting portion and a card connection portion, one end of the connecting portion is connected to the main body portion, and the other end extends along one end in the thickness direction of the shielding member, the card connection portion is connected to one end of the connecting portion away from the shielding member and is located in the card slot.

5. The housing assembly according to claim 4, wherein, In a direction from one end of the connecting portion connected to the clamping portion to one end of the connecting portion connected to the main body portion, one end of the clamping portion facing the groove side wall is inclined toward the groove side wall.

6. The housing assembly according to claim 2, wherein The second connection parts are multiple and spaced apart along the circumferential direction of the main body, and the first connection parts are multiple and correspond one to one with the second connection parts.

7. The housing assembly according to claim 1, characterized in that, The shielding member includes a plurality of sub-blocking members, the plurality of sub-blocking 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 toward the sub-blocking members fall within the contours of the plurality of sub-blocking members; Alternatively, there is one shielding member.

8. The housing assembly according to claim 1, wherein, At least a portion of the shield is spaced apart from the slot sidewall; And / or, an exhaust groove for exhausting air is formed on the shielding member.

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, The invention comprises a housing assembly according to any one of claims 1 to 9.

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