A top cover assembly, a battery and an assembling method of the top cover assembly

Abstract

The application discloses a top cover assembly, a battery and an assembling method of the top cover assembly. The top cover assembly comprises a top cover sheet, an insulating piece and a reinforcing piece. The insulating piece is arranged on one side of the top cover sheet facing the battery cell. The reinforcing piece is arranged on the one side of the top cover sheet facing the battery cell. The insulating piece is connected with the reinforcing piece. In the top cover assembly, the reinforcing piece can strengthen the overall strength of the top cover assembly, without increasing the thickness of the top cover sheet, so that the strength of the top cover assembly is improved, the internal space of the battery cell is not occupied too much, and the large-capacity use requirement of the battery is met.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and more particularly to a top cover assembly, a battery, and a method for assembling the top cover assembly. Background Technology

[0002] Among existing new energy batteries, there are prismatic batteries, cylindrical batteries, and blade batteries. In the top cover assembly of prismatic batteries, in order to prevent deformation during the assembly process and to meet performance testing requirements, the thickness of the top cover sheet changes as the length and width of the top cover sheet increase. This results in an increase in the overall height of the finished top cover assembly, a reduction in the internal space of the battery cell, and an increase in production costs. Summary of the Invention

[0003] This application provides a top cover assembly, a battery, and a method for assembling the top cover assembly to at least partially solve the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a top cover assembly is provided, comprising: Top cover plate; An insulating element disposed on the side of the top cover sheet facing the battery cell; and, A reinforcing member is provided on the side of the top cover plate facing the battery cell, and the insulating member is connected to the reinforcing member.

[0005] In some embodiments, the insulating member is provided with a snap-fit ​​portion, which is snap-fitted and fixed to the reinforcing member.

[0006] In some embodiments, the insulating member further includes a body having a receiving cavity, and the snap-fit ​​portion is disposed within the receiving cavity.

[0007] In some embodiments, the snap-fit ​​portion includes a vertical extension portion and a horizontal extension portion, the vertical extension portion being disposed on the bottom wall surface of the accommodating cavity, and the horizontal extension portion being connected to the side of the vertical extension portion away from the battery cell; or, the snap-fit ​​portion is disposed on the side wall surface of the accommodating cavity.

[0008] In some embodiments, the snap-fit ​​portion is provided in a plurality of ways, and the plurality of snap-fit ​​portions are disposed at intervals in the receiving cavity.

[0009] In some embodiments, the reinforcing member includes: A first connecting portion extends along the thickness direction of the top cover sheet; The second connecting part is connected to the side of the first connecting part away from the battery cell, and the second connecting part is connected to the side of the top cover plate facing the battery cell. The third connecting part and the second connecting part are connected to the side of the first connecting part facing the battery cell. An installation gap is formed between the third connecting part and the second connecting part, and the snap-fit ​​part snaps into the installation gap.

[0010] In some embodiments, the first connecting portion is provided in multiple ways, and the multiple first connecting portions are arranged at intervals on the third connecting portion, and each first connecting portion is bent and connected to the second connecting portion.

[0011] In some embodiments, the reinforcing member includes: The fourth connecting portion is connected to the side of the top cover plate facing the battery cell; and, A fifth connecting part is connected to the fourth connecting part; one of the fourth connecting part or the fifth connecting part is provided with a through hole, and the snap-fit ​​part snaps into the through hole.

[0012] In some embodiments, at least two fourth connecting portions are provided, and at least two fourth connecting portions are spaced apart on opposite sides of the fifth connecting member along the length direction of the top cover plate, and the fifth connecting portions protrude from the surface of the fourth connecting portions facing the battery cell; wherein, the through hole is provided in the fifth connecting portion; or, At least two fifth connecting portions are provided, and along the length direction of the top cover plate, at least two fifth connecting portions are spaced apart and arranged on opposite sides of the fourth connecting portion, with the fourth connecting portion protruding from the surface of the fifth connecting portion facing away from the battery cell; wherein, the through hole is provided in the fifth connecting portion; or, The fourth connecting portion is provided in at least two parts, and along the length direction of the top cover piece, at least two of the fourth connecting portions are arranged at intervals on opposite sides of the fifth connecting portion; wherein, the through hole is provided in the fourth connecting portion.

[0013] In some embodiments, the fourth connecting portion and the fifth connecting portion have a circular arc transition.

[0014] In some embodiments, the top cover assembly further includes a pole post, with the reinforcing member provided on both sides of the pole post along the length direction of the top cover sheet; and / or, The top cover assembly also includes an explosion-proof valve, and the reinforcing members are provided on both sides of the explosion-proof valve along the length of the top cover piece.

[0015] In some embodiments, the reinforcing member is provided on the periphery of the pole post; and / or, the reinforcing member is provided on the periphery of the explosion-proof valve.

[0016] According to a second aspect of this application, a battery is provided that includes the aforementioned top cover assembly.

[0017] According to a third aspect of this application, a method for assembling a top cover assembly is provided, comprising: The explosion-proof valve is welded to the top cover plate; or the explosion-proof valve and the top cover plate are integrally formed. The reinforcing member is installed on the top cover plate such that the reinforcing member is positioned on the side of the top cover plate facing the battery cell; The insulating component is installed on the reinforcing member such that the insulating component is positioned on the side of the top cover plate facing the battery cell; Install the sealing ring, electrode block, and electrode post onto the top cover plate; The electrode post is riveted to the electrode block; or the electrode post is welded to the electrode block. The tab is directly connected to the pole post; or, the connecting piece is connected to the pole post and the tab is connected to the connecting piece.

[0018] In the top cover assembly of this application embodiment, since a reinforcing member is provided on the top cover sheet, the reinforcing member can enhance the overall strength of the top cover assembly. That is, the strength of the top cover assembly can be improved without increasing the thickness of the top cover sheet, avoiding occupying too much internal space of the battery cell and meeting the high-capacity usage requirements of the battery.

[0019] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0021] Figure 1 This is a schematic diagram of the structure of the top cover assembly provided in an exemplary embodiment of this disclosure; Figure 2 This is an internal cross-sectional view of a first structure for connecting a reinforcing member and an insulating member according to an exemplary embodiment of this disclosure; Figure 3 This is an internal cross-sectional view of a second structure for connecting the reinforcing member and the insulating member according to an exemplary embodiment of this disclosure; Figure 4 This is an internal cross-sectional view of a third structure for connecting a reinforcing member and an insulating member, provided in an exemplary embodiment of this disclosure; Figure 5This is an internal cross-sectional view of a fourth structure for connecting the reinforcing member and the insulating member, provided in an exemplary embodiment of this disclosure; Figure 6 This is a schematic diagram of the first structure of the reinforcing member provided in the exemplary embodiments of this disclosure; Figure 7 This is a schematic diagram of the second structure of the reinforcing member provided in the exemplary embodiments of this disclosure; Figure 8 This is a schematic diagram of the third structure of the reinforcing member provided in the exemplary embodiments of this disclosure; Figure 9 This is a schematic diagram of the fourth structure of the reinforcing member provided in the exemplary embodiments of this disclosure; Figure 10 This is a schematic diagram of the fifth structure of the reinforcing member provided in the exemplary embodiments of this disclosure; Figure 11 This is a schematic diagram of a first process of the top cover assembly provided in an exemplary embodiment of this disclosure; Figure 12 This is a second flowchart illustrating the top cover assembly provided in an exemplary embodiment of this disclosure.

[0022] Explanation of reference numerals in the attached figures: 1. Top cover assembly; 11. Top cover plate; 12. Insulating component; 121. Snap-fit ​​part; 1211. Vertical extension part; 1212. Horizontal extension part; 122. Body; 123. Receiving cavity; 13. Reinforcing member; 131. First connecting part; 132. Second connecting part; 133. Third connecting part; 134. Mounting gap; 135. Fourth connecting part; 136. Fifth connecting part; 137. Through hole; 14. Pole post; 15. Explosion-proof valve. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0024] This application provides a top cover assembly 1, a battery, and a method for assembling the top cover assembly 1. Please refer to [link / reference]. Figure 1 , Figure 1 This is a schematic diagram of the structure of the top cover assembly 1 provided in an embodiment of this application.

[0025] A top cover assembly 1 includes a top cover sheet 11, an insulating member 12, and a reinforcing member 13. The insulating member 12 is disposed on the side of the top cover sheet 11 facing the battery cell. The reinforcing member 13 is disposed on the side of the top cover sheet 11 facing the battery cell. The insulating member 12 and the reinforcing member 13 are connected.

[0026] In the top cover assembly 1 of this application embodiment, since a reinforcing member 13 is provided on the top cover sheet 11, the reinforcing member 13 can play the role of strengthening the overall strength of the top cover assembly 1. That is, the strength of the top cover assembly 1 can be improved without increasing the thickness of the top cover sheet 11, avoiding occupying too much internal space of the battery cell and meeting the large capacity usage requirements of the battery.

[0027] It should be noted that in this embodiment, the reinforcing member 13 and the top cover plate 11 are set as separate structures, and the reinforcing member 13 and the top cover plate 11 are connected and fixed by welding, which facilitates the processing of the reinforcing member 13; however, this design is not limited to this, and in other embodiments, the reinforcing member 13 and the top cover plate 11 can also be integrally formed.

[0028] Understandably, due to the setting of the reinforcing member 13, the strength of the top cover assembly 1 can be improved without increasing the overall thickness of the top cover sheet 11, thereby avoiding occupying too much internal space of the battery. With the same thickness of the top cover sheet 11, the size of the battery cell can be increased, thereby increasing the battery capacity.

[0029] In some embodiments, refer to Figures 2 to 5 As shown, the insulating member 12 is provided with a snap-fit ​​part 121, which is snap-fitted and fixed to the reinforcing member 13.

[0030] Thus, by providing a reinforcing member 13 on the top cover plate 11, and having the reinforcing member 13 snap-fitted with the insulating member 12, the insulating member 12 can be effectively fixed and supported, thereby ensuring the connection of the insulating member 12; and since the reinforcing member 13 and the insulating member 12 are connected by snap-fitting, the impact on the explosion-proof valve 15 during the heat fusion process can be avoided, ensuring the normal use of the explosion-proof valve 15.

[0031] In some embodiments, refer to Figures 2 to 5 As shown, the insulating component 12 also includes a body 122, on which a receiving cavity 123 is provided, and a snap-fit ​​portion 121 is disposed in the receiving cavity 123.

[0032] Thus, by setting the accommodating cavity 123, the reinforcing member 13 can be accommodated in the accommodating cavity 123, thereby reducing the space occupied by the reinforcing member 13 inside the battery, and thus enabling the setting of a larger capacity cell and increasing the battery capacity.

[0033] It should also be noted that, in this embodiment, the body 122 includes a bottom wall surface and two side walls, which are connected to the corresponding sides of the bottom wall surface. The two side walls are also connected between the top cover plate 11 and the bottom wall surface, so that the bottom wall surface and the two side walls define an accommodating cavity 123. The snap-fit ​​part 121 can be located between the two side walls, so that the snap-fit ​​part is disposed in the accommodating cavity 123.

[0034] In some embodiments, refer to Figures 2 to 5 As shown, the snap-fit ​​portion 121 includes a vertical extension portion 1211 and a horizontal extension portion 1212. The vertical extension portion 1211 is disposed on the bottom wall surface of the receiving cavity 123, and the horizontal extension portion 1212 is connected to the side of the vertical extension portion 1211 away from the battery cell; or, the snap-fit ​​portion 121 is disposed on the side wall surface of the receiving cavity 123.

[0035] Thus, by providing the vertical extension 1211 and the horizontal extension 1212, the overall strength of the snap-fit ​​part 121 can be increased, making the connection between the insulating member 12 and the reinforcing member 13 more secure, thereby limiting the height of the insulating member 12 and preventing the insulating member 12 from moving up and down; in addition, the snap-fit ​​part 121 can also be directly provided on the side wall of the receiving cavity 123, which can also limit the height of the insulating member 12 and prevent the insulating member 12 from moving up and down.

[0036] In some embodiments, multiple snap-fit ​​portions 121 are provided, and the multiple snap-fit ​​portions 121 are spaced apart in the receiving cavity 123.

[0037] Thus, by providing multiple snap-fit ​​parts 121, a stable connection between the insulating part 12 and the reinforcing part 13 can be ensured, avoiding the phenomenon of battery short circuit caused by loosening of the insulating part 12.

[0038] In some embodiments, refer to Figure 6 As shown, the reinforcing member 13 includes a first connecting portion 131, a second connecting portion 132, and a third connecting portion 133. The first connecting portion 131 extends along the thickness direction of the top cover plate 11. The second connecting portion 132 is connected to the side of the first connecting portion 131 away from the battery cell, and the second connecting portion 132 is connected to the side of the top cover plate 11 facing the battery cell. The second connecting portion 132 is connected to the side of the first connecting portion 131 facing the battery cell. An installation gap 134 is formed between the third connecting portion 133 and the second connecting portion 132, and the snap-fit ​​portion 121 snaps into the installation gap 134.

[0039] Thus, the first connecting part 131 and the second connecting part 132 extend in different directions, and the first connecting part 131 and the third connecting part 133 extend in different directions, which can improve the overall strength of the reinforcing member 13 itself, and form an installation gap 134 between the second connecting part 132 and the third connecting part 133, which can facilitate the connection of the snap-fit ​​part 121 and improve the stability of the connection.

[0040] In some embodiments, a plurality of first connecting portions 131 are provided, and the plurality of first connecting portions 131 are spaced apart from the third connecting portion 133, and a second connecting portion 132 is bent and connected to each first connecting portion 131.

[0041] Thus, the first connecting part 131 and the third connecting part 133 can be formed by various methods such as sheet metal bending and extrusion profiles, which is convenient for processing. Furthermore, the bending connection between the first connecting part 131 and the third connecting part 133 can better resist the deformation of the top cover plate 11.

[0042] In this way, a weight-reducing space can be formed between the multiple first connecting parts 131, which can reduce the weight of the entire reinforcing member 13, thereby reducing the weight of the entire top cover assembly 1 and facilitating the use of the battery.

[0043] In some embodiments, refer to Figures 7 to 9 As shown, the reinforcing member 13 includes a fourth connecting portion 135 and a fifth connecting portion 136. The fourth connecting portion 135 is connected to the side of the top cover plate 11 facing the battery cell. The fifth connecting portion 136 is connected to the fourth connecting portion 135. One of the fourth connecting portion 135 or the fifth connecting portion 136 is provided with a through hole 137, and the snap-fit ​​portion 121 snaps into the through hole 137.

[0044] In this embodiment, the positioning and limiting between the reinforcing member 13 and the insulating member 12 can be achieved through the cooperation of the through hole 137 and the snap-fit ​​part 121, ensuring quick connection while also achieving limiting cooperation between the reinforcing member 13 and the insulating member 12.

[0045] In some embodiments, refer to Figure 7 As shown, at least two fourth connecting portions 135 are provided. Along the length direction of the top cover plate 11, at least two fourth connecting portions 135 are spaced apart on opposite sides of the fifth connector, and the fifth connecting portion 136 protrudes from the side surface of the fourth connecting portion 135 facing the battery cell; wherein, a through hole 137 is provided in the fifth connecting portion 136.

[0046] Thus, by placing the two fourth connecting parts 135 on both sides of the fifth connecting part 136, the strength of the reinforcing member 13 itself can be improved, the connection stability between the reinforcing member 13 and the top cover plate 11 can be improved, and the deformation of the top cover plate 11 can be better resisted. In addition, the weight reduction space formed between the two fourth connecting parts 135 can reduce the weight of the entire reinforcing member 13, thereby reducing the weight of the entire top cover assembly 1, which facilitates the use of the battery.

[0047] In some embodiments, refer to Figure 8 As shown, at least two fifth connection portions 136 are provided. Along the length direction of the top cover plate 11, at least two fifth connection portions 136 are arranged at intervals on opposite sides of the fourth connection portion 135, and the fourth connection portion 135 protrudes from the side surface of the fifth connection portion 136 away from the battery cell; wherein, a through hole 137 is provided in the fifth connection portion 136.

[0048] Thus, by placing the two fifth connecting parts 136 on both sides of the fifth connecting part 136, the strength of the reinforcing member 13 itself can be improved, and the connection stability between the reinforcing member 13 and the insulating member 12 can be improved. It can also better resist the deformation of the top cover plate 11. Furthermore, the weight reduction space formed between the two fifth connecting parts 136 can reduce the weight of the entire reinforcing member 13, thereby reducing the weight of the entire top cover assembly 1 and facilitating the use of the battery.

[0049] In some embodiments, refer to Figure 9 As shown, at least two fourth connecting portions 135 are provided, and along the length direction of the top cover plate 11, at least two fourth connecting portions 135 are arranged at intervals on opposite sides of the fifth connecting portion 136; wherein, a through hole 137 is provided in the fourth connecting portion 135.

[0050] Thus, by placing the two fourth connecting parts 135 on both sides of the fifth connecting part 136, the strength of the reinforcing member 13 itself can be improved, the connection stability between the reinforcing member 13 and the top cover plate 11 can be improved, and the deformation of the top cover plate 11 can be better resisted. In addition, the weight reduction space formed between the two fourth connecting parts 135 can reduce the weight of the entire reinforcing member 13, thereby reducing the weight of the entire top cover assembly 1, which facilitates the use of the battery.

[0051] In some embodiments, refer to Figure 10 As shown, at least two fourth connecting parts 135 and at least two fifth connecting parts 136 are provided, and the fourth connecting parts 135 and the fifth connecting parts 136 are arranged alternately.

[0052] For example, along the width direction of the top cover plate 11, the fourth connecting portion 135 and the fifth connecting portion 136 are alternately arranged. Alternatively, along the length direction of the top cover plate 11, the fourth connecting portion 135 and the fifth connecting portion 136 are alternately arranged.

[0053] Thus, by alternating the fourth connecting portion 135 and the fifth connecting portion 136, the strength of the reinforcing member 13 itself can be improved, the connection stability between the reinforcing member 13 and the top cover plate 11 can be improved, and the deformation of the top cover plate 11 can be better resisted; and the fifth connecting portion 136 is provided to protrude from the fourth connecting portion 135, so that there is a gap between two adjacent fourth connecting portions 135.

[0054] Therefore, the reinforcing member 13 can also be placed between the insulating member 12 and the top cover plate 11. It is understood that the insulating member 12 has multiple openings that can communicate with the explosion-proof valve 15 at the position corresponding to the explosion-proof valve 15. The reinforcing member 13 is placed between the insulating member 12 and the top cover plate 11, and the reinforcing member 13 is positioned corresponding to the explosion-proof valve. It can support the insulating member 12. When the insulating member 12 is heated, the reinforcing member 13 can also prevent the openings from being blocked, thereby ensuring the normal use of the explosion-proof valve 15.

[0055] In some embodiments, the fourth connecting portion 135 and the fifth connecting portion 136 are connected by a rounded transition.

[0056] Thus, by setting the transition between the fourth connecting portion 135 and the fifth connecting portion 136 as an arc, the stress between the fourth connecting portion 135 and the fifth connecting portion 136 can be reduced, thereby preventing the possibility of breakage between the fourth connecting portion 135 and the fifth connecting portion 136.

[0057] In some embodiments, refer to Figure 1 As shown, the top cover assembly 1 also includes a pole post 14, and reinforcement members 13 are provided on both sides of the pole post 14 along the length direction of the top cover piece 11.

[0058] Thus, by placing the reinforcing member 13 on both sides of the terminal post 14, the strength of the top cover assembly 1 can be improved, and the top cover piece 11 at the corresponding position of the terminal post 14 can be prevented from lifting up, thereby preventing the sealing ring fitted on the terminal post 14 from failing and ensuring the normal use of the battery.

[0059] In some embodiments, refer to Figure 1 As shown, the top cover assembly 1 also includes an explosion-proof valve 15, and reinforcement members 13 are provided on both sides of the explosion-proof valve 15 along the length direction of the top cover piece 11.

[0060] Thus, by placing the reinforcing member 13 on both sides of the pole post 14, the strength of the top cover assembly 1 can be improved, and the top cover piece 11 at the corresponding position of the explosion-proof valve 15 can be prevented from warping. This ensures that the explosion-proof valve 15 can open smoothly under the set pressure, thus preventing the possibility of battery explosion.

[0061] In some embodiments, reinforcing members 13 are provided on the periphery of the pole post 14; and / or, reinforcing members 13 are provided on the periphery of the explosion-proof valve 15.

[0062] Thus, by providing reinforcing members 13 around the pole post 14 or the explosion-proof valve 15, the overall strength of the top cover assembly 1 can be better improved, resulting in a better effect.

[0063] It should also be noted that, in the specific implementation process, the connection between the pole post 14 and the insulating component 12 can be rounded to make the connection between the pole post 14 and the insulating component 12 smooth and avoid the phenomenon of puncturing the insulating component 12 during the connection process, so as to ensure airtightness and the insulation effect of the insulating component 12.

[0064] According to a second aspect of this application, this disclosure provides a battery that includes the aforementioned top cover assembly 1. This battery possesses all the beneficial effects of the aforementioned top cover assembly 1, which will not be elaborated further herein.

[0065] According to the third aspect of this application, referring to Figure 11 As shown, this disclosure provides a method for assembling a top cover assembly 1, which includes: S101: The reinforcing member 13 is installed on the top cover plate 11 so that the reinforcing member 13 is located on the side of the top cover plate 11 facing the battery cell; S102: The insulating member 12 is installed on the reinforcing member 13 such that the insulating member 12 is disposed on the side of the top cover plate 11 facing the battery cell.

[0066] Thus, by installing a reinforcing member 13 on the top cover plate 11, the reinforcing member 13 can enhance the overall strength of the top cover assembly 1. That is, the strength of the top cover assembly 1 can be improved without increasing the thickness of the top cover plate 11, avoiding occupying too much internal space of the battery cell and meeting the high-capacity usage requirements of the battery.

[0067] Furthermore, the installation of the reinforcing member 13 and the insulating member 12 can fix and support the insulating member 12, thereby ensuring the connection between the insulating member 12 and the top cover plate 11.

[0068] In some embodiments, refer to Figure 11 As shown, the assembly method of the top cover assembly 1 further includes the following steps before installing the reinforcing member 13 onto the top cover piece 11: The explosion-proof valve 15 is welded to the top cover plate 11; or the explosion-proof valve 15 and the top cover plate 11 are integrally formed.

[0069] By welding the explosion-proof valve 15 and the top cover plate 11, a high level of sealing can be achieved, ensuring that the explosion-proof valve 15 can be opened under the set operating conditions. By integrally molding the explosion-proof valve 15 and the top cover plate 11, the separate stamping, assembly, and welding processes of the explosion-proof valve 15 are eliminated, greatly reducing the number of production steps.

[0070] In some embodiments, refer to Figure 11As shown, after the insulating member 12 is installed on the reinforcing member 13, the assembly method of the top cover assembly 1 further includes: installing the sealing ring, the electrode block and the electrode post 14 on the top cover plate 11.

[0071] In the specific assembly process, the top cover assembly 1 also includes a sealing ring, an upper plastic, and an electrode block. The sealing ring, the upper plastic, and the electrode block are all installed on the top cover plate 11. The sealing ring is used to seal the electrode post 14, the upper plastic is used to seal the side of the top cover plate 11 away from the battery cell, and the electrode block is used to connect the electrode post 14 and the busbar.

[0072] In some embodiments, refer to Figure 11 As shown, after installing the sealing ring, electrode block, and electrode post 14 onto the top cover plate 11, the assembly method of the top cover assembly 1 further includes: riveting the electrode post 14 to the electrode block; or welding the electrode post 14 to the electrode block.

[0073] In practice, the electrode block can be welded to the electrode post 14. The laser welding connection method can make the contact resistance between the electrode block and the electrode post 14 low, which is conducive to the passage of large current and reduces heat generation. The electrode block can also be riveted to the electrode post 14. Riveting can achieve precise positioning of the electrode block and the electrode post 14. Combined with the compression of the sealing ring, it can enhance the sealing performance of the top cover.

[0074] In some embodiments, refer to Figure 12 As shown, after installing the sealing ring, electrode block, and electrode post 14 onto the top cover plate 11, the assembly method of the top cover assembly 1 further includes: directly connecting the electrode tab to the electrode post 14; or, connecting the connecting piece to the electrode post 14 and connecting the electrode tab to the connecting piece.

[0075] In other words, in this embodiment, the tabs can be connected to the terminals 14 by connecting tabs, and the connecting tab material (aluminum for positive electrode, copper / nickel for negative electrode) can be flexibly selected to solve the problem of material mismatch between the tabs and terminals 14, and it is suitable for welding multi-layer tabs; the tabs can also be directly connected to the terminals 14, eliminating the space occupied by the connecting tabs and improving the volumetric energy density of the battery. In summary, this embodiment provides a method for assembling a top cover assembly, including the following steps: S201: Weld the explosion-proof valve 15 to the top cover plate 11; or integrally form the explosion-proof valve 15 and the top cover plate 11; S202: The reinforcing member 13 is installed on the top cover plate 11 so that the reinforcing member 13 is located on the side of the top cover plate 11 facing the battery cell; S203: The insulating member 12 is installed on the reinforcing member 13 so that the insulating member 12 is disposed on the side of the top cover plate 11 facing the battery cell; S204: Install the sealing ring, electrode block and electrode post 14 onto the top cover plate 11; S205: Rivet the pole post 14 to the electrode block; or weld the pole post 14 to the electrode block; S206: Connect the tab directly to the pole post 14; or, connect the connecting piece to the pole post 14 and connect the tab to the connecting piece.

[0076] It should be further noted that the order of each step in the above assembly method for the top cover assembly 1 is not intended to limit the preferred order of the embodiments.

[0077] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0078] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0079] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0080] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A top cover assembly, characterized in that, include: Top cover plate (11); An insulating element (12) is disposed on the side of the top cover plate (11) facing the battery cell; and, A reinforcing member (13) is disposed on the side of the top cover plate (11) facing the battery cell, and an insulating member (12) is connected to the reinforcing member (13).

2. The top cover assembly according to claim 1, characterized in that, The insulating member (12) is provided with a snap-fit ​​part (121), which is snap-fitted and fixed to the reinforcing member (13).

3. The top cover assembly according to claim 2, characterized in that, The insulating component (12) also includes a body (122), on which a receiving cavity (123) is provided, and the snap-fit ​​part (121) is disposed in the receiving cavity (123).

4. The top cover assembly according to claim 3, characterized in that, The latching part (121) includes a vertical extension part (1211) and a horizontal extension part (1212). The vertical extension part (1211) is disposed on the bottom wall surface of the accommodating cavity (123), and the horizontal extension part (1212) is connected to the side of the vertical extension part (1211) away from the battery cell; or, the latching part (121) is disposed on the side wall surface of the accommodating cavity (123).

5. The top cover assembly according to claim 3, characterized in that, The snap-fit ​​portion (121) is provided in multiple ways, and the multiple snap-fit ​​portions (121) are arranged at intervals in the receiving cavity (123).

6. The top cover assembly according to any one of claims 2-5, characterized in that, The reinforcing member (13) includes: The first connecting portion (131) extends along the thickness direction of the top cover plate (11); The second connecting part (132) is connected to the side of the first connecting part (131) away from the battery cell, and the second connecting part (132) is connected to the side of the top cover (11) facing the battery cell. The third connecting part (133) and the second connecting part (132) are connected to the side of the first connecting part (131) facing the battery cell. An installation gap (134) is formed between the third connecting part (133) and the second connecting part (132). The snap-fit ​​part (121) snaps into the installation gap (134).

7. The top cover assembly according to claim 6, characterized in that, The first connecting part (131) is provided in multiple ways, and the multiple first connecting parts (131) are arranged at intervals on the third connecting part (133). Each first connecting part (131) is bent and connected to a second connecting part (132).

8. The top cover assembly according to any one of claims 2-5, characterized in that, The reinforcing member (13) includes: The fourth connecting part (135) is connected to the top cover plate (11) on the side facing the battery cell; and, The fifth connecting part (136) is connected to the fourth connecting part (135); one of the fourth connecting part (135) or the fifth connecting part (136) is provided with a through hole (137), and the snap-fit ​​part (121) snaps into the through hole (137).

9. The top cover assembly according to claim 8, characterized in that, At least two fourth connecting portions (135) are provided, and along the length direction of the top cover plate (11), at least two fourth connecting portions (135) are spaced apart and arranged on opposite sides of the fifth connector, and the fifth connecting portion (136) protrudes from the surface of the fourth connecting portion (135) facing the battery cell; wherein, the through hole (137) is provided in the fifth connecting portion (136); or, At least two fifth connecting portions (136) are provided. Along the length direction of the top cover plate (11), at least two fifth connecting portions (136) are spaced apart on opposite sides of the fourth connecting portion (135), and the fourth connecting portion (135) protrudes from the surface of the fifth connecting portion (136) away from the battery cell; wherein, the through hole (137) is provided in the fifth connecting portion (136); or, At least two fourth connecting portions (135) are provided, and along the length direction of the top cover plate (11), at least two fourth connecting portions (135) are spaced apart and arranged on opposite sides of the fifth connecting portion (136); wherein, the through hole (137) is provided in the fourth connecting portion (135); or, The fourth connecting part (135) is provided in at least two, and the fifth connecting part (136) is provided in at least two, and the fourth connecting part (135) and the fifth connecting part (136) are arranged alternately.

10. The top cover assembly according to claim 8, characterized in that, The fourth connecting part (135) and the fifth connecting part (136) are connected by a circular arc.

11. The top cover assembly according to any one of claims 1-5, characterized in that, The top cover assembly (1) further includes a pole post (14), and along the length direction of the top cover piece (11), the reinforcing member (13) is provided on both sides of the pole post (14); and / or, The top cover assembly (1) also includes an explosion-proof valve (15), and the reinforcing member (13) is provided on both sides of the explosion-proof valve (15) along the length direction of the top cover piece (11).

12. The top cover assembly according to claim 11, characterized in that, The reinforcing member (13) is provided on the periphery of the pole post (14); and / or, the reinforcing member (13) is provided on the periphery of the explosion-proof valve (15).

13. A battery, characterized in that, Includes the top cover assembly (1) as described in any one of claims 1-12.

14. A method for assembling a top cover assembly, characterized in that, include: The explosion-proof valve (15) is welded to the top cover plate (11); or the explosion-proof valve (15) and the top cover plate (11) are integrally formed. The reinforcing member (13) is installed on the top cover plate (11) such that the reinforcing member (13) is disposed on the side of the top cover plate (11) facing the battery cell; The insulating element (12) is installed on the reinforcing element (13) such that the insulating element (12) is disposed on the side of the top cover plate (11) facing the battery cell; Install the sealing ring, electrode block and electrode post (14) onto the top cover plate (11); The pole post (14) is riveted to the pole block; or the pole post (14) is welded to the pole block. The tab is directly connected to the pole post (14); or, the connecting piece is connected to the pole post (14) and the tab is connected to the connecting piece.

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