Battery shell capable of preventing tab from being damaged

Abstract

The utility model provides a battery shell capable of preventing a tab from being damaged, and relates to the technical field of lithium batteries. The battery shell comprises a shell body and a mounting cover, wherein the shell body is used for accommodating a battery pole group; the mounting cover comprises a top cover assembly, a connecting piece and at least one clamping piece, the connecting piece is clamped to the upper end face of the top cover assembly through the clamping piece, and the lower end face of the top cover assembly is connected to the shell body; and the upper end surface of the top cover assembly is provided with a tab avoiding through hole allowing a tab on the battery pole group to pass through and an accommodating groove for accommodating the tab corresponding to the connecting sheet. According to the battery shell with the anti-damage tabs, the space utilization rate of the shell body can be improved, and deformation, damage or contact short circuit of the tabs can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a battery shell with anti-damage tabs. Background Art

[0002] Existing lithium batteries include a casing, a cover plate, and a pole group arranged in the casing. The pole tabs of the pole group are arranged in a bent state between the cover plate and the pole group. During the actual assembly and subsequent use of the lithium battery, the pole tabs may be deformed, damaged, or short-circuited due to the uncontrollable shape of the pole tabs. In addition, since the connecting piece is arranged between the cover plate and the pole group, the space utilization rate in the casing is poor. Utility Model Content

[0003] The purpose of the utility model is to provide a battery shell with anti-damage to the tabs, which can improve the space utilization of the shell body and prevent the tabs from being deformed, damaged or short-circuited.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] Tab damage-resistant battery housing, including:

[0006] The shell body is used to accommodate the battery electrode group;

[0007] The mounting cover comprises a top cover assembly, a connecting piece and at least one clip, wherein the connecting piece is clipped to the upper end surface of the top cover assembly through the clip, and the lower end surface of the top cover assembly is connected to the housing body;

[0008] The upper end surface of the top cover assembly is provided with a tab avoidance through hole corresponding to the connecting piece for allowing the tab on the battery electrode group to pass through, and a receiving groove for accommodating the tab.

[0009] As a further technical solution, the first end of the clamping member is fixedly connected to the top cover assembly, and the second end is provided with a clamping portion, which cooperates with the top cover assembly to form a clamping space, and the edge of the connecting piece is clamped in the clamping space.

[0010] As a further technical solution, the first end of the clip is fixedly connected to the top cover assembly, the second end is provided with a clip portion, and an avoidance hole corresponding to the clip is provided on the connecting piece. The clip portion passes through the avoidance hole and abuts against the upper end surface of the connecting piece so that the connecting piece is clipped to the top cover assembly.

[0011] As a further technical solution, the upper end surface of the top cover assembly is provided with a clamping groove, and the clamping member is provided at the open end or bottom wall of the clamping groove.

[0012] As a further technical solution, an avoidance step is provided on the connecting piece corresponding to the clamping portion, and the clamping portion is clamped to the avoidance step.

[0013] As a further technical solution, the top cover assembly includes a first plastic part and a second plastic part, the second plastic part is integrally molded with the first plastic part, or the second plastic part is movably arranged on the upper end surface of the first plastic part, the clip is arranged on the upper end surface of the second plastic part, and the first plastic part is connected to the shell body.

[0014] As a further technical solution, a connection reinforcement plate is provided on a side of the second plastic part close to the first plastic part, and the width of the connection reinforcement plate is set to 1 mm to 10 mm.

[0015] As a further technical solution, two tab avoidance through holes are provided on the first plastic part, and the two tab avoidance through holes are relatively arranged on both sides of the connecting piece and penetrate the second plastic part along the height direction. The accommodating grooves are correspondingly provided on the opposite sides of each tab avoidance through hole.

[0016] As a further technical solution, an explosion-proof valve and a liquid injection hole are provided on the first plastic part at intervals, and both the explosion-proof valve and the liquid injection hole are connected to the shell body.

[0017] As a further technical solution, T=-1J~0.5J, wherein T is the distance between the upper end surface of the first plastic part in the top cover assembly and the upper end surface of the shell body top plate, and H is the thickness of the top plate.

[0018] Compared with the existing technology, the technical advantages of the tab-damage-proof battery housing provided by the present invention are:

[0019] 1. Because the connecting piece is connected to the upper end surface of the top cover assembly via a snap-fit ​​member, when the top cover assembly is connected to the housing body, the connecting piece is outside the housing body, thereby reducing the amount of space occupied by the connecting piece within the housing body and improving the internal space utilization of the housing body. In addition, because the connecting piece is connected to the upper end surface of the top cover assembly via a snap-fit ​​member, the connection convenience, connection strength, and connection stability between the connecting piece and the top cover assembly are improved. At the same time, the gap between the connecting piece and the top cover assembly is reduced, thereby reducing the spatial volume of the top cover assembly, thereby achieving the technical effect of reducing the amount of space occupied by the top cover assembly within the housing body.

[0020] 2. Because the tab-avoidance holes are provided on the top cover assembly, when the top cover assembly is connected to the housing body, the tabs inside the housing body can extend out of the housing body through the corresponding tab-avoidance holes. This arrangement, on the one hand, reduces the tabs' occupation of the housing body's internal space, thereby further improving the internal space utilization of the housing body; on the other hand, because the tabs can extend outside the housing body, they can prevent the tabs from being folded or squeezed inside the housing body, which could cause the tabs to deform, thereby reducing the tab deformation rate.

[0021] 3. Since a receiving groove is provided on the top cover assembly, after the tab extends out of the shell body through the corresponding tab avoidance through-hole, it is retracted into the corresponding receiving groove to prevent the tab from being damaged due to friction, and at the same time, it can avoid the tab from short-circuiting due to poor retraction shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0023] Figure 1 This is an exploded view of a battery housing with anti-damage tabs provided by an embodiment of the present utility model;

[0024] Figure 2 This is a schematic structural diagram of a battery housing with anti-touch tabs provided by an embodiment of the present invention;

[0025] Figure 3 This is a first-direction cross-sectional view of a battery housing with tab damage prevention provided by an embodiment of the present utility model;

[0026] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle;

[0027] Figure 5 It is a second direction cross-sectional view of the tab-damage-proof battery housing provided by an embodiment of the present utility model.

[0028] In the picture:

[0029] 100, housing body;

[0030] 200, mounting cover; 210, top cover assembly; 201, tab avoidance through hole; 202, accommodating groove; 211, first plastic part; 2111, explosion-proof valve; 2112, injection hole; 212, second plastic part; 2121, connecting reinforcement plate; 220, connecting piece; 230, snap-in part; 240, snap-in groove. DETAILED DESCRIPTION

[0031] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0032] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0033] In this application, the term "and / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.

[0034] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0035] In this application, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. associated with a specific value. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0036] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0037] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0038] Combine Figures 1 to 5 As shown, the tab-damage-proof battery housing (hereinafter referred to as the battery housing) provided in this embodiment can improve the space utilization of the housing body 100 and prevent the tabs from being deformed, damaged or short-circuited. Specifically, the battery housing includes a housing body 100 and a mounting cover 200: the housing body 100 is used to accommodate the battery pole group; the mounting cover 200 includes a top cover assembly 210, a connecting piece 220 and at least one clip 230, the connecting piece 220 is clipped to the upper end face of the top cover assembly 210 through the clip 230, and the lower end face of the top cover assembly 210 is connected to the housing body 100; the upper end face of the top cover assembly 210 is provided with a tab avoidance through-hole 201 corresponding to the connecting piece 220 to allow the tabs on the battery pole group to pass through, and a receiving groove 202 for accommodating the tabs.

[0039] Because the connecting piece 220 is clamped to the upper end surface of the top cover assembly 210 via the clamping member 230, when the top cover assembly 210 is connected to the housing body 100, the connecting piece 220 is outside the housing body 100, thereby reducing the amount of space occupied by the connecting piece 220 within the housing body 100, thereby improving the internal space utilization of the housing body 100. In addition, because the connecting piece 220 is clamped to the upper end surface of the top cover assembly 210 via the clamping member 230, the connection convenience, connection strength, and connection stability between the connecting piece 220 and the top cover assembly 210 are improved. At the same time, the gap between the connecting piece 220 and the top cover assembly 210 is reduced, thereby reducing the spatial volume of the top cover assembly 210, thereby achieving the technical effect of reducing the amount of space occupied by the top cover assembly 210 within the housing body 100.

[0040] Since the tab avoidance through-holes 201 are provided on the top cover assembly 210, when the top cover assembly 210 is connected to the housing body 100, the tabs inside the housing body 100 can extend outside the housing body 100 through the corresponding tab avoidance through-holes 201. This arrangement, on the one hand, can reduce the space occupied by the tabs in the interior of the housing body 100, thereby further improving the internal space utilization of the housing body 100; on the other hand, since the tabs can extend outside the housing body 100, it can prevent the tabs from being folded or squeezed inside the housing body 100, thereby reducing the deformation rate of the tabs.

[0041] Since a receiving groove 202 is provided on the top cover assembly 210, after the tab extends out of the shell body 100 through the corresponding tab avoidance through-hole 201, it is gathered in the corresponding receiving groove 202 to prevent the tab from being damaged due to friction and to avoid the tab from short-circuiting due to poor folding shape.

[0042] In addition, in this embodiment, the top cover assembly 210 is set to be a flat plate. When the lower end surface of the top cover assembly 210 is directly connected to the shell body 100, the occupation of the internal space of the shell body 100 by the top cover assembly 210 can be reduced, thereby further improving the internal space utilization of the shell body 100.

[0043] According to actual needs, one or more clips 230 can be provided. In this embodiment, in order to ensure the connection effect between the connecting piece 220 and the top cover assembly 210, two clips 230 are provided as an example for description, specifically:

[0044] Preferably, the first end of the clip 230 is fixedly connected to the top cover assembly 210, and the second end is provided with a clip portion. The clip portion cooperates with the top cover assembly 210 to form a clip space, and the edge of the connecting piece 220 is clipped into the clip space. The two clips 230 are arranged opposite each other, and the first ends of the two clips 230 are both fixedly connected to the top cover assembly 210. The two clip portions extend in a direction approaching each other and cooperate with the top cover assembly 210 to form a clip space. When the edge of the connecting piece 220 is clipped into the clip space, the two clips 230 cooperate with each other to limit the relative position of the connecting piece 220 and the top cover assembly 210 in the horizontal and vertical directions.

[0045] In some other embodiments, the first end of the clamping member 230 is fixedly connected to the top cover assembly 210, and the second end is provided with a clamping portion. A avoidance hole (not shown in the figure) is provided on the connecting piece 220 corresponding to the clamping member 230. The clamping portion passes through the avoidance hole and abuts against the upper end surface of the connecting piece 220 so that the connecting piece 220 is clamped to the top cover assembly 210.

[0046] Specific combination Figure 4 As shown, the first ends of the two clips 230 are fixedly connected to the top cover assembly 210, and the two clips extend in directions away from each other. When the connecting piece 220 is placed on the top cover assembly 210, the two clips pass through the avoidance holes and abut against the upper end surface of the connecting piece 220, thereby limiting the relative position of the connecting piece 220 and the top cover assembly 210 in the horizontal and vertical directions. In this embodiment, the connecting piece 220 is provided with two avoidance holes, and the top cover assembly 210 is provided with four clips 230 for each connecting piece 220.

[0047] Furthermore, the upper end surface of the top cover assembly 210 is provided with a snap-fit ​​groove 240, and the snap-fit ​​member 230 is provided at the opening end or the bottom wall of the snap-fit ​​groove 240.

[0048] The cross-sectional shape of the snap-fit ​​groove 240 is set to correspond to the cross-sectional shape of the connecting piece 220, and the cross-sectional area of ​​the snap-fit ​​groove 240 is larger than the cross-sectional area of ​​the connecting piece 220. When the two snap-fit ​​parts 230 are relatively set at the open ends of the snap-fit ​​groove 240, the connecting piece 220 is set behind the snap-fit ​​groove 240, and the two snap-fit ​​parts are snapped to the edges of the connecting piece 220; when the two snap-fit ​​parts 230 are relatively set at the bottom wall of the snap-fit ​​groove 240, the connecting piece 220 is set behind the snap-fit ​​groove 240, and the two snap-fit ​​parts are snapped to the middle of the connecting piece 220 corresponding to the avoidance hole. The snap-in groove 240 is recessed in the upper end surface of the top cover assembly 210. When the connecting piece 220 is snapped into the snap-in groove 240, it not only improves the connection strength and connection stability between the connecting piece 220 and the top cover assembly 210, but also can reduce the overall thickness of the top cover assembly 210 as much as possible, thereby further reducing the internal space occupied by the top cover assembly 210 of the shell body 100.

[0049] Furthermore, a relief step (not shown) is provided on the connecting piece 220 corresponding to the engaging portion, and the engaging portion engages with the relief step. This arrangement ensures the connection strength and stability between the connecting piece 220 and the top cover assembly 210 while minimizing the height of the engaging member 230, thereby minimizing the overall thickness of the top cover assembly 210.

[0050] Preferably, the top cover assembly 210 includes a first plastic part 211 and a second plastic part 212, the second plastic part 212 and the second plastic part 212 are integrally formed, or the second plastic part 212 is movably arranged on the upper end surface of the first plastic part 211, the clamping part 230 is arranged on the upper end surface of the second plastic part 212, and the first plastic part 211 is connected to the shell body 100.

[0051] When the second plastic part 212 is integrally formed and disposed on the upper end surface of the first plastic part 211, the processing step of connecting the second plastic part 212 and the first plastic part 211 can be omitted, thereby ensuring the use effect while saving processing costs. When the second plastic part 212 is movably disposed on the upper end surface of the first plastic part 211, since the second plastic part 212 is movably disposed on the upper end surface of the first plastic part 211, during processing, the connecting piece 220 can be first connected to the second plastic part 212, and then the second plastic part 212 connected with the connecting piece 220 can be connected to the first plastic part 211, thereby completing the assembly of the top cover assembly 210. During the entire process, since the second plastic part 212 is relatively small in size, the connection convenience can be improved when connecting the connecting piece 220 to the second plastic part 212, thereby improving the overall assembly convenience of the top cover assembly 210.

[0052] When multiple second plastic parts 212 are provided on the first plastic part 211 , it can also be configured such that several second plastic parts 212 are integrally formed and provided on the upper end surface of the first plastic part 211 , and the other several second plastic parts 212 are movably provided on the upper end surface of the first plastic part 211 .

[0053] In addition, in this embodiment, there are two connecting pieces 220, and correspondingly, there are two second plastic parts 212. The two second plastic parts 212 are spaced apart and arranged on the same lower first plastic part 211. Four tab avoidance through holes 201 are arranged on the first plastic part 211 corresponding to the two second plastic parts 212.

[0054] Furthermore, a connection reinforcement plate 2121 is provided on one side of the second plastic part 212 close to the first plastic part 211 , and the width of the connection reinforcement plate 2121 is set to 1 mm to 10 mm.

[0055] Specifically, the connecting reinforcement plate 2121 extends in an annular shape along the circumference of the second plastic part 212. The connecting reinforcement plate 2121 is connected to the upper end surface of the first plastic part 211 to connect the second plastic part 212 to the upper end surface of the first plastic part 211. The connecting reinforcement plate 2121 can improve the connection strength and stability between the second plastic part 212 and the first plastic part 211. Depending on actual needs, the width of the connecting reinforcement plate 2121 can be set to 1 mm, 4 mm, 8 mm, 10 mm, etc., with a minimum of no less than 1 mm and a maximum of no more than 10 mm. If the width of the connecting reinforcement plate 2121 is too large, the overall volume and weight of the second plastic part 212 and the top cover assembly 210 will be excessive, increasing production costs and affecting the aesthetics of the battery case. If the width of the connecting reinforcement plate 2121 is too small, the connection strength and stability between the second plastic part 212 and the first plastic part 211 cannot be guaranteed, and the processing difficulty of connecting the second plastic part 212 to the first plastic part 211 will increase.

[0056] Preferably, two tab avoidance holes 201 are provided on the first plastic part 211. These two tab avoidance holes 201 are oppositely positioned on either side of the connecting piece 220 and extend vertically through the second plastic part 212. Each tab avoidance hole 201 is provided with a corresponding receiving groove 202 on either side. This arrangement ensures that the corresponding tab is gathered, preventing the tab from shorting due to poorly gathered tabs contacting the housing. It also minimizes the overall thickness of the top cover assembly 210, thereby reducing the internal space occupied by the mounting cover 200 within the housing body 100. Furthermore, since the tab avoidance holes 201 are provided with receiving grooves 202 on either side, the tab is ensured to be gathered within the receiving groove 202 closest to the corresponding tab avoidance hole 201 after extending out of the housing body 100, further reducing the risk of tab deformation or damage.

[0057] Preferably, an explosion-proof valve 2111 and a liquid injection hole 2112 are provided on the first plastic part 211 at intervals, and both the explosion-proof valve 2111 and the liquid injection hole 2112 are communicated with the shell body 100 .

[0058] Specifically, the end face of the explosion-proof valve 2111 is provided with a notch (not shown in the figure), which is used to explode in a thermal runaway state to achieve the normal pressure relief function of the explosion-proof valve 2111, thereby reducing the risk of explosion of the battery pack using the battery shell. In order to make the structure of the entire battery shell more compact, in this embodiment, the explosion-proof valve 2111 is arranged between the two connecting pieces 220. Specifically, the two connecting pieces 220 are respectively provided as the positive connecting piece 220 and the negative connecting piece 220. The explosion-proof valve 2111 can be provided close to the positive connecting piece 220 or close to the negative connecting piece 220. The notch can be provided on the upper end face or the lower end face of the explosion-proof valve 2111 according to actual needs. It is not specifically limited in this embodiment. The specific structure of the explosion-proof valve 2111 is provided with reference to the prior art and will not be repeated in this embodiment.

[0059] After the top cover assembly 210 is connected to the housing body 100, liquid can be directly injected into the battery electrode assembly in the housing body 100 through the liquid injection hole 2112. To improve the compactness of the overall structure, the liquid injection hole 2112 is provided between the explosion-proof valve 2111 and one of the connecting pieces 220. In other embodiments, the liquid injection hole 2112 may not be provided.

[0060] Preferably, T=-1J~0.5J, wherein T is the distance between the upper end surface of the first plastic part 211 in the top cover assembly 210 and the upper end surface of the top plate of the shell body 100, and H is the thickness of the top plate.

[0061] In this embodiment, the first plastic component 211 is disposed on the top plate of the housing body 100. Specifically, the distance between the first plastic component 211 and the top plate of the housing body 100 is set based on the actual thickness of the top plate of the lower housing body 100. When the distance between the first plastic component 211 and the top plate of the housing body 100 is a negative number, the first plastic component 211 is projected from the top plate of the housing body 100. When the distance between the first plastic component 211 and the top plate of the housing body 100 is a positive number, the first plastic component 211 is recessed from the top plate of the housing body 100. If the distance between the first plastic component 211 and the top plate of the housing body 100 is too large, the overall strength of the battery housing will be reduced, thereby shortening the service life of the battery housing. If the distance between the first plastic component 211 and the top plate of the housing body 100 is too small, the space utilization rate within the lower housing body 100 will be reduced. Therefore, in this embodiment, the preferred setting is T = -1J to 0.5J. In some other embodiments, according to actual needs, the first plastic part 211 may also be disposed on the front panel or the side panel of the housing body 100 .

[0062] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Tab-proof battery housing, characterized in that: include: The housing body (100) is used to accommodate the battery electrode group; The mounting cover (200) comprises a top cover assembly (210), a connecting piece (220) and at least one clamping member (230), wherein the connecting piece (220) is clamped to the upper end surface of the top cover assembly (210) through the clamping member (230), and the lower end surface of the top cover assembly (210) is connected to the housing body (100); The upper end surface of the top cover assembly (210) is provided with a tab avoidance through-hole (201) corresponding to the connecting piece (220) for allowing the tab on the battery pole group to pass through, and a receiving groove (202) for accommodating the tab.

2. The tab-damage-proof battery housing according to claim 1, characterized in that: The first end of the clamping member (230) is fixedly connected to the top cover assembly (210), and the second end is provided with a clamping portion, the clamping portion cooperates with the top cover assembly (210) to form a clamping space, and the edge of the connecting piece (220) is clamped in the clamping space.

3. The tab-damage-proof battery housing according to claim 1, characterized in that: The first end of the clamping member (230) is fixedly connected to the top cover assembly (210), and the second end is provided with a clamping portion. The connecting piece (220) is provided with an avoidance hole corresponding to the clamping member (230), and the clamping portion passes through the avoidance hole and abuts against the upper end surface of the connecting piece (220), so that the connecting piece (220) is clamped to the top cover assembly (210).

4. The tab-damage-proof battery housing according to claim 2 or 3, characterized in that: The upper end surface of the top cover assembly (210) is provided with a clamping groove (240), and the clamping member (230) is provided at the opening end or the bottom wall of the clamping groove (240).

5. The tab-damage-proof battery housing according to claim 4, characterized in that: The connecting piece (220) is provided with an avoidance step corresponding to the clamping portion, and the clamping portion is clamped to the avoidance step.

6. The tab-damage-resistant battery housing according to claim 1, characterized in that: The top cover assembly (210) includes a first plastic part (211) and a second plastic part (212), wherein the second plastic part (212) and the first plastic part (211) are integrally formed, or the second plastic part (212) is movably arranged on the upper end surface of the first plastic part (211), the clamping part (230) is arranged on the upper end surface of the second plastic part (212), and the first plastic part (211) is connected to the shell body (100).

7. The tab-damage-resistant battery housing according to claim 6, characterized in that: A connection reinforcement plate (2121) is provided on one side of the second plastic part (212) close to the first plastic part (211), and the width of the connection reinforcement plate (2121) is set to 1 mm to 10 mm.

8. The tab-damage-resistant battery housing according to claim 6, characterized in that: The first plastic part (211) is provided with two tab avoidance through holes (201), which are arranged on both sides of the connecting piece (220) and pass through the second plastic part (212) in the height direction. The two opposite sides of each tab avoidance through hole (201) are correspondingly provided with the accommodating groove (202).

9. The tab-damage-resistant battery housing according to claim 6, characterized in that: An explosion-proof valve (2111) and a liquid injection hole (2112) are also provided on the first plastic part (211) at intervals, and both the explosion-proof valve (2111) and the liquid injection hole (2112) are in communication with the housing body (100).

10. The tab-damage-resistant battery housing according to claim 1, wherein: T=-1J~0.5J, wherein T is the distance between the upper end surface of the first plastic part (211) in the top cover assembly (210) and the upper end surface of the top plate of the shell body (100), and H is the thickness of the top plate.

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