Cover plate with through hole and battery shell

Abstract

The utility model provides a cover plate with a penetrating hole and a battery shell, and relates to the technical field of batteries. The cover plate with the penetrating hole is arranged on an installation shell and comprises a connecting piece and a plastic part, the lower end face of the plastic part can be connected to the installation shell, the connecting piece is connected to the upper end face of the plastic part in a hot melting or hot riveting mode, a tab through hole is formed in one side of the connecting piece, and the plastic part is provided with a tab through hole communicated with the installation shell. And the tabs in the mounting shell can penetrate out of the mounting shell through the tab through holes. According to the cover plate with the penetrating holes and the battery shell, the space utilization rate of the battery shell can be improved, and the deformation rate of the tabs can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a cover plate with a through hole and a battery shell. Background Art

[0002] Batteries generally consist of a top cover assembly, a housing, and a stage group that work together. Specifically, the stage group is installed within the housing, and the top cover assembly is positioned over the open end of the housing to enclose the stage group within the housing. The stage group is provided with tabs. In existing batteries, because the connecting tab is positioned below the top cover assembly, placing the top cover assembly behind the housing's open end results in low space utilization within the housing. Furthermore, because the tabs are located between the top cover assembly and the stage group, they can deform due to improper assembly or space limitations after assembly. Utility Model Content

[0003] The purpose of the present invention is to provide a cover plate with a through hole and a battery housing, which can improve the space utilization of the battery housing and reduce the deformation rate of the tab.

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

[0005] A cover plate with a through hole is provided on the mounting housing and includes:

[0006] Connecting piece;

[0007] A plastic part, the lower end face of the plastic part can be connected to the mounting shell, the connecting piece is hot-melt or hot-riveted to the upper end face of the plastic part, the plastic part is provided with a tab through-hole connected to the mounting shell, the tab through-hole is provided on one side of the connecting piece, and the tab in the mounting shell can pass through the tab through-hole to the outside of the mounting shell.

[0008] As a further technical solution, at least one connecting column is provided on the upper end surface of the plastic part, and the connecting piece is provided with a connecting hole corresponding to the connecting column, and the connecting column is connected to the corresponding connecting hole by hot melting or hot riveting.

[0009] As a further technical solution, the end of the connecting column facing away from the plastic part is set as a limiting connecting part, the diameter of the limiting connecting part is larger than the diameter of the connecting column, the upper end surface of the connecting piece is set with a limiting connecting groove, the connecting hole is set on the bottom wall corresponding to the limiting connecting groove, and the limiting connecting part is limitedly connected to the corresponding limiting connecting groove.

[0010] As a further technical solution, the upper end surface of the plastic part is provided with a mounting groove, and the connecting column is provided on the bottom wall of the mounting groove.

[0011] As a further technical solution, the plastic part is provided with a liquid injection port, two connecting pieces are provided on the plastic part at intervals, the liquid injection port is communicated with the mounting shell, and is located between the two connecting pieces.

[0012] As a further technical solution, an explosion-proof valve communicating with the mounting housing is provided on the plastic part, and the explosion-proof valve is provided between the liquid injection port and one of the connecting pieces.

[0013] As a further technical solution, the plastic part includes a first plastic part and a second plastic part, the second plastic part is configured as a flat plate, the first plastic part is integrally formed and arranged on the upper end surface of the second plastic part, and the connecting piece is arranged on the upper end surface of the first plastic part.

[0014] As a further technical solution, the plastic part includes a first plastic part and a second plastic part, the second plastic part is configured as a flat plate, the first plastic part is movably disposed on the upper end surface of the second plastic part, and the connecting piece is disposed on the upper end surface of the first plastic part.

[0015] As a further technical solution, an auxiliary connecting plate is provided on the outer wall of the first plastic part. The auxiliary connecting plate extends in a ring shape along the circumference of the first plastic part. The width of the auxiliary connecting plate is set to 1mm to 10mm.

[0016] A battery case includes a mounting case and a cover plate with a through-hole. The mounting case can accommodate a battery stage group. The cover plate is arranged on the mounting case. The tabs on the battery stage group can pass through the tab through-holes on the cover plate and out of the mounting case. In addition, D = -1R ~ 0.5R, where D is the distance between the upper end surface of the second plastic part in the cover plate and the upper end surface of the top plate of the mounting case, and R is the thickness of the top plate.

[0017] Compared with the prior art, the cover plate and battery housing with through holes provided by the present invention have the following technical advantages:

[0018] 1. Because the connecting piece is connected to the upper end surface of the plastic part by hot melting or hot riveting, when the plastic part is connected to the mounting housing, the connecting piece is outside the mounting housing, thereby reducing the space occupied by the connecting piece within the mounting housing and improving the internal space utilization of the mounting housing. In addition, because the connecting piece is connected to the upper end surface of the plastic part by hot melting or hot riveting, this connection method not only improves the convenience, strength, and stability of the connection between the two, but also further reduces the gap between the connecting piece and the plastic part, thereby reducing the spatial volume of the cover plate, thereby achieving the technical effect of reducing the space occupied by the cover plate within the mounting housing.

[0019] 2. Because the plastic part is provided with tab through-holes, when the plastic part is connected to the mounting housing, the tabs inside the mounting housing can extend outside the mounting housing through the corresponding tab through-holes. This arrangement can, on the one hand, reduce the tabs' occupation of the mounting housing's internal space, thereby further improving the internal space utilization of the mounting housing; on the other hand, because the tabs can extend outside the mounting housing, they can prevent the tabs from being folded or squeezed inside the mounting housing, resulting in tab deformation, thereby reducing the tab deformation rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing 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 any creative work.

[0021] Figure 1 This is an exploded view of a battery housing provided by an embodiment of the present utility model;

[0022] Figure 2 This is a schematic structural diagram of a battery housing provided by an embodiment of the present utility model;

[0023] Figure 3 is a cross-sectional view of a battery housing provided by an embodiment of the present utility model;

[0024] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle.

[0025] In the picture:

[0026] 10. Install the housing;

[0027] 100, connecting piece; 110, connecting hole;

[0028] 200, plastic part; 201, first plastic part; 2011, auxiliary connecting plate; 202, second plastic part; 210, tab through hole; 220, connecting column; 221, position limiting connecting portion; 230, mounting groove;

[0029] 300. Liquid injection port;

[0030] 400. Explosion-proof valve. 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 4 As shown, the cover plate with a through hole provided in this embodiment (hereinafter referred to as the cover plate) can improve the space utilization of the battery housing and reduce the deformation rate of the tab. Specifically, the cover plate includes a connecting piece 100 and a plastic part 200. The lower end surface of the plastic part 200 can be connected to the mounting housing 10. The connecting piece 100 is hot-melted or hot-riveted to the upper end surface of the plastic part 200. The tab through hole 210 is provided on one side of the connecting piece 10. The plastic part 200 is provided with a tab through hole 210 that communicates with the mounting housing 10. The tab in the mounting housing 10 can pass through the tab through hole 210 to the outside of the mounting housing 10.

[0039] Because the connecting piece 100 is connected to the upper end surface of the plastic part 200 by hot melting or hot riveting, when the plastic part 200 is connected to the mounting housing 10, the connecting piece 100 is outside the mounting housing 10, thereby reducing the space occupied by the connecting piece 100 within the mounting housing 10 and improving the internal space utilization of the mounting housing 10. In addition, because the connecting piece 100 is connected to the upper end surface of the plastic part 200 by hot melting or hot riveting, this connection method not only improves the convenience, strength, and stability of the connection between the two, but also further reduces the gap between the connecting piece 100 and the plastic part 200, thereby reducing the spatial volume of the cover plate, thereby achieving the technical effect of reducing the space occupied by the cover plate within the mounting housing 10.

[0040] Because the tab through-holes 210 are provided on the plastic part 200, when the plastic part 200 is connected to the mounting housing 10, the tabs inside the mounting housing 10 can extend outside the mounting housing 10 through the corresponding tab through-holes 210. This arrangement, on the one hand, can reduce the space occupied by the tabs inside the mounting housing 10, thereby further improving the internal space utilization of the mounting housing 10; on the other hand, because the tabs can extend outside the mounting housing 10, it can prevent the tabs from being folded or squeezed inside the mounting housing 10, resulting in the tabs being deformed, thereby reducing the tab deformation rate.

[0041] Specifically, two tab through holes 210 are provided on the plastic part 200 corresponding to a mounting slot 230 . The two tab through holes 210 are relatively arranged on both sides of the corresponding mounting slot 230 . Both tab through holes 210 pass through the plastic part 200 in the height direction and are connected to the interior of the mounting shell 10 .

[0042] In addition, in this embodiment, the plastic part 200 is set to be flat. When the lower end surface of the plastic part 200 is directly connected to the mounting shell 10, the occupation of the internal space of the mounting shell 10 by the plastic part 200 can be reduced, thereby further improving the internal space utilization of the mounting shell 10.

[0043] Furthermore, at least one connecting post 220 is provided on the upper end surface of the plastic part 200 , and the connecting piece 100 is provided with a connecting hole 110 corresponding to the connecting post 220 , and the connecting post 220 is connected to the corresponding connecting hole 110 by hot melting or hot riveting.

[0044] Specifically, in this embodiment, two connecting columns 220 are spaced apart on the upper end surface of the plastic part 200, and two connecting holes 110 are correspondingly provided on the connecting piece 100. The two connecting holes 110 are connected to the two connecting columns 220 by hot melting or hot riveting one by one, so as to further improve the connection strength and connection stability of the connecting piece 100 to the plastic part 200.

[0045] In other embodiments, the number of connecting posts 220 provided on the upper end surface of the plastic part 200 can be appropriately increased or decreased according to actual needs, and the number of connecting holes 110 on the connecting sheet 100 is provided corresponding to the number of connecting posts 220 .

[0046] Furthermore, one end of the connecting column 220 facing away from the plastic part 200 is set as a limiting connecting portion 221, the diameter of the limiting connecting portion 221 is larger than the diameter of the connecting column 220, and the upper end surface of the connecting piece 100 is provided with a limiting connecting groove (not shown in the figure), the connecting hole 110 is provided on the bottom wall of the corresponding limiting connecting groove, and the limiting connecting portion 221 is limitedly connected to the corresponding limiting connecting groove.

[0047] Specifically, the cross-sectional shape and cross-sectional area of ​​the limiting connection groove correspond to the cross-sectional shape and cross-sectional area of ​​the limiting connection portion 221. Since the limiting connection groove is located above the connection hole 110, a limiting step is formed between the limiting connection groove and the connection hole 110. When the connection hole 110 is connected to the corresponding connection column 220, the limiting connection portion 221 is limitedly connected to the corresponding limiting connection groove. This can limit the relative position of the connecting piece 100 and the plastic part 200 in the height direction, preventing the connecting piece 100 and the plastic part 200 from shifting relative to each other in the height direction, thereby further improving the connection strength and stability of the connecting piece 100 after being hot-melt or hot-riveted to the plastic part 200.

[0048] Furthermore, a mounting groove 230 is provided on the upper end surface of the plastic part 200, and a connecting post 220 is provided on the bottom wall of the mounting groove 230. The cross-sectional area of ​​the mounting groove 230 is larger than the cross-sectional area of ​​the connecting piece 100. The mounting groove 230 is recessed in the upper end surface of the plastic part 200, and the connecting post 220 is provided on the bottom wall of the mounting groove 230. After the connecting piece 100 and the connecting post 220 are connected by hot melt or hot riveting, the connecting post 220 cooperates with the inner wall of the mounting groove 230, thereby improving the connection strength and stability between the connecting piece 100 and the plastic part 200. The mounting groove 230, recessed in the upper end surface of the plastic part 200, can minimize the overall thickness of the cover plate, thereby further reducing the amount of space occupied by the cover plate within the mounting housing 10.

[0049] Preferably, the plastic part 200 is provided with a liquid injection port 300. Two connecting pieces 100 are provided on the plastic part 200 at intervals. The liquid injection port 300 is connected to the mounting housing 10 and is located between the two connecting pieces 100. After the cover plate is connected to the battery housing, liquid can be directly injected into the battery stage group in the battery housing through the liquid injection port 300. In order to improve the compactness of the overall structure, the liquid injection port 300 is provided between the two connecting pieces 100. The two connecting pieces 100 are respectively provided as the positive electrode connecting piece 100 and the negative electrode connecting piece 100. The liquid injection port 300 can be provided close to the positive electrode connecting piece 100 or the negative electrode connecting piece 100. Since there are two connecting pieces 100, there are correspondingly two first plastic parts 201. The two first plastic parts 201 are provided at intervals on the same second plastic part 202. The second plastic part 202 is provided with four tab through-holes 210 corresponding to the two first plastic parts 201. In other embodiments, the liquid injection port 300 may not be provided.

[0050] Preferably, an explosion-proof valve 400 communicating with the mounting housing 10 is provided on the plastic part 200 , and the explosion-proof valve 400 is provided between the liquid injection port 300 and one of the connecting pieces 100 .

[0051] Specifically, the end face of the explosion-proof valve 400 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 400, 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 400 is arranged between the liquid injection port 300 and one of the connecting pieces 100. The notch can be provided on the upper end face or the lower end face of the explosion-proof valve 400 according to actual needs, and is not limited in this embodiment. The specific structure of the explosion-proof valve 400 is set with reference to the existing technology and will not be repeated in this embodiment.

[0052] Preferably, the plastic part 200 includes a first plastic part 201 and a second plastic part 202. The second plastic part 202 is configured in a flat plate shape. The first plastic part 201 is integrally formed on the upper end surface of the second plastic part 202, and the mounting groove 230 is provided on the upper end surface of the first plastic part 201. Since the first plastic part 201 is integrally formed on the upper end surface of the second plastic part 202, during processing, the assembly and subsequent connection can be directly completed by integral molding, and then the connecting piece 100 is injection molded and connected to the upper end surface of the first plastic part 201. This arrangement can omit the processing step of connecting the first and second plastic parts 201 and 202, ensuring the desired performance while reducing processing costs. Since the mounting groove 230 is provided on the upper end surface of the first plastic part 201, two tab through-holes 210 are correspondingly provided on the first plastic part 201, located on either side of the mounting groove 230. Both tab through-holes 210 extend vertically through the second plastic part 202 and then communicate with the mounting housing 10.

[0053] In other embodiments, the plastic part 200 includes a first plastic part 201 and a second plastic part 202. The second plastic part 202 is configured as a flat plate. The first plastic part 201 is movably mounted on the upper end surface of the second plastic part 202. The connecting piece 100 is mounted on the upper end surface of the first plastic part 201. Because the first plastic part 201 is movably mounted on the upper end surface of the second plastic part 202, during processing, the connecting piece 100 can be first connected to the first plastic part 201, and then the upper injection molded part with the connecting piece 100 connected can be connected to the lower injection molded part, thereby completing the assembly of the cover. During this entire process, the smaller size of the upper injection molded part improves the ease of connection when connecting the connecting piece 100 to the first plastic part 201, thereby improving the overall assembly convenience of the cover.

[0054] When multiple first plastic parts 201 are provided on the second plastic part 202 , it can also be configured such that several first plastic parts 201 are integrally formed and provided on the upper end surface of the second plastic part 202 , and the other several first plastic parts 201 are movably provided on the upper end surface of the second plastic part 202 .

[0055] Furthermore, an auxiliary connecting plate 2011 is provided on the outer wall of the first plastic part 201 . The auxiliary connecting plate 2011 extends in a ring shape along the circumference of the first plastic part 201 . The width of the auxiliary connecting plate 2011 is set to 1 mm to 10 mm.

[0056] Specifically, the auxiliary connecting plate 2011 is connected to the upper end surface of the second plastic part 202 to achieve connection between the first plastic part 201 and the upper end surface of the second plastic part 202. The auxiliary connecting plate 2011 can improve the connection strength and stability between the two. According to actual needs, the width of the auxiliary connecting plate 2011 is set to 1mm, 4mm, 8mm, 10mm, etc., with a minimum of not less than 1mm and a maximum of not more than 10mm. If the width of the auxiliary connecting plate 2011 is too large, the volume and weight of the first plastic part 201 and the plastic part 200 as a whole will be too large, which will not only increase production costs but also affect the aesthetics of the cover plate and the battery housing. If the width of the auxiliary connecting plate 2011 is too small, the connection strength and stability between the first plastic part 201 and the second plastic part 202 cannot be guaranteed, and the processing difficulty of connecting the first plastic part 201 to the second plastic part 202 will be increased.

[0057] The battery case includes a mounting case 10 and a cover plate with a through-hole. The mounting case 10 can accommodate a battery stage group. The cover plate is set on the mounting case 10. The tabs on the battery stage group can pass through the tab through-holes 210 on the cover plate and pass out of the mounting case 10. In addition, D = -1R ~ 0.5R, where D is the distance between the upper end surface of the second plastic part 202 in the cover plate and the upper end surface of the top plate of the mounting case 10, and R is the thickness of the top plate.

[0058] In this embodiment, the second plastic part 202 is disposed on the top plate of the mounting housing 10. Specifically, the distance between the second plastic part 202 and the top plate of the mounting housing 10 is set based on the actual thickness of the top plate of the mounting housing 10. When the distance between the second plastic part 202 and the top plate of the mounting housing 10 is a negative number, the second plastic part 202 is projected from the top plate of the mounting housing 10. When the distance between the second plastic part 202 and the top plate of the mounting housing 10 is a positive number, the second plastic part 202 is recessed from the top plate of the mounting housing 10. If the distance between the second plastic part 202 and the top plate of the mounting housing 10 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 second plastic part 202 and the top plate of the mounting housing 10 is too small, the space utilization rate within the mounting housing 10 will be reduced. In other embodiments, the second plastic part 202 may also be disposed on the front plate or side plate of the mounting housing 10, depending on actual needs.

[0059] 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. A cover plate with a through hole, arranged on the mounting housing (10), characterized in that: include: Connecting piece (100); A plastic part (200), wherein the lower end surface of the plastic part (200) can be connected to the mounting shell (10), the connecting piece (100) is connected to the upper end surface of the plastic part (200) by hot melting or hot riveting, and the plastic part (200) is provided with a tab through-hole (210) communicating with the mounting shell (10), the tab through-hole (210) is provided on one side of the connecting piece (100), and the tab in the mounting shell (10) can pass through the tab through-hole (210) to the outside of the mounting shell (10).

2. The cover plate with a through hole according to claim 1, characterized in that: The upper end surface of the plastic part (200) is provided with at least one connecting column (220), the connecting piece (100) is provided with a connecting hole (110) corresponding to the connecting column (220), and the connecting column (220) is connected to the corresponding connecting hole (110) by hot melting or hot riveting.

3. The cover plate with a through hole according to claim 2, characterized in that: One end of the connecting column (220) facing away from the plastic part (200) is provided as a limiting connecting portion (221), the diameter of the limiting connecting portion (221) is larger than the diameter of the connecting column (220), the upper end surface of the connecting piece (100) is provided with a limiting connecting groove, the connecting hole (110) is provided on the bottom wall corresponding to the limiting connecting groove, and the limiting connecting portion (221) is limitedly connected to the corresponding limiting connecting groove.

4. The cover plate with a through hole according to claim 2, characterized in that: The upper end surface of the plastic part (200) is provided with a mounting groove (230), and the connecting column (220) is provided on the bottom wall of the mounting groove (230).

5. The cover plate with a through hole according to claim 1, characterized in that: The plastic part (200) is provided with a liquid injection port (300), and two connecting pieces (100) are spaced apart on the plastic part (200). The liquid injection port (300) is communicated with the mounting housing (10) and is located between the two connecting pieces (100).

6. The cover plate with a through hole according to claim 5, characterized in that: The plastic part (200) is provided with an explosion-proof valve (400) in communication with the mounting housing (10), and the explosion-proof valve (400) is provided between the liquid injection port (300) and one of the connecting pieces (100).

7. The cover plate with a through hole according to any one of claims 1 to 6, characterized in that: The plastic part (200) comprises a first plastic part (201) and a second plastic part (202); the second plastic part (202) is arranged in a flat plate shape; the first plastic part (201) is integrally formed and arranged on the upper end surface of the second plastic part (202); and the connecting piece (100) is arranged on the upper end surface of the first plastic part (201).

8. The cover plate with a through hole according to any one of claims 1 to 6, characterized in that: The plastic part (200) comprises a first plastic part (201) and a second plastic part (202), the second plastic part (202) being arranged in a flat plate shape, the first plastic part (201) being movably arranged on the upper end surface of the second plastic part (202), and the connecting piece (100) being arranged on the upper end surface of the first plastic part (201).

9. The cover plate with a through hole according to claim 8, characterized in that: An auxiliary connecting plate (2011) is provided on the outer wall of the first plastic part (201), the auxiliary connecting plate (2011) extending in a ring shape along the circumference of the first plastic part (201), and the width of the auxiliary connecting plate (2011) is set to 1mm to 10mm.

10. A battery housing, characterized in that: The invention comprises a mounting shell (10) and a cover plate with a through hole as claimed in any one of claims 1 to 9, wherein the mounting shell (10) can accommodate a battery stage group, the cover plate is arranged on the mounting shell (10), and the tabs on the battery stage group can pass through the tab through holes (210) on the cover plate and out of the mounting shell (10), and D = -1R to 0.5R, wherein D is the distance between the upper end surface of the second plastic part (202) in the cover plate and the upper end surface of the top plate of the mounting shell (10), and R is the thickness of the top plate.

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