A battery cover plate assembly and battery for reducing internal resistance of a battery

Abstract

The utility model discloses a battery cover plate subassembly and battery of reducing battery internal resistance, including pole, riveting block, cover plate, lower insulating part, upper insulating part and pole row, pole includes the riveting portion and the butt platform of riveting part and the column main part, and the column main part includes the coaxial setting of first column section and second column section, and the diameter of first column section is less than the diameter of second column section, and the annular surface on the top of second column section is equipped with a plurality of tooth like structure, and the middle part of riveting block has the first through -hole of going through up and down, and first column section is worn and is equipped with in first through -hole, and tooth like structure is pressed in riveting block bottom wall, and riveting portion rivets in riveting block top, and cover plate column main part is worn and is equipped with in cover plate, and lower insulating part is equipped between butt platform and cover plate bottom, and upper insulating part is equipped between cover plate top and riveting block, and pole row is connected in lower insulating part bottom, and butt platform bottom and pole row top butt. Tooth like structure can be engaged in riveting block to reduce the internal resistance of battery, and the engagement structure can make the mechanical strength of pole connection increase.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to a battery cover assembly and battery for reducing battery internal resistance. Background Technology

[0002] In battery structure, the cover plate is a key component connecting the internal battery cells to the external circuitry. Typically, the battery cover plate has terminals to achieve electrical connection between the internal electrodes and external loads or charging equipment. Currently, the industry commonly uses a riveting process to install the terminals onto the cover plate, that is, fixing the terminals to the riveted terminals through riveting. In existing technologies, problems such as loose bonding and insufficient adhesion between the terminals and the riveted terminals can occur. This loose bonding easily leads to gaps or insufficient contact area at the connection interface, resulting in increased contact resistance and a rise in the overall internal resistance of the battery. Increased internal resistance not only affects the battery's energy efficiency but also causes localized overheating during charging and discharging, seriously impacting the battery's safety performance and cycle life. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery cover assembly that reduces the internal resistance of the battery, thereby solving the problem of insecure terminal post riveting.

[0004] A battery cover assembly for reducing battery internal resistance according to a first aspect of the present invention includes: a terminal post, a riveting block, a cover plate, a lower insulating member, an upper insulating member, and a terminal array. The terminal post includes a post body, a riveting portion, and an abutment platform. The post body includes a first post segment and a second post segment coaxially arranged. The first post segment is located at the top of the second post segment, and the diameter of the first post segment is smaller than the diameter of the second post segment. The riveting portion is located at the upper end of the first post segment, and the abutment platform is located at the lower end of the second post segment. The top annular surface is provided with multiple tooth-like structures. The riveting block has a first through hole running vertically through the middle. The first column segment passes through the first through hole. The tooth-like structures are pressed against the bottom wall of the riveting block. The riveting part is riveted to the top of the riveting block. The column body of the cover plate passes through the cover plate. The lower insulating member is disposed between the abutment platform and the bottom of the cover plate. The upper insulating member is disposed between the top of the cover plate and the riveting block. The electrode row is connected to the bottom of the lower insulating member. The bottom of the abutment platform abuts against the top of the electrode row.

[0005] According to an embodiment of the present invention, a battery cover assembly for reducing battery internal resistance has at least the following beneficial effects: a first column segment passes through a first through hole in a rivet block, and the toothed structure on the annular top surface of a second column segment can abut against the bottom wall of the rivet block. When riveting the top of the first column segment, the riveting part and the toothed structure can press tightly against the rivet block, and the toothed structure can engage with the rivet block. The gap between the pole post and the rivet block is reduced, which can reduce the internal resistance of the battery. Moreover, the engagement structure can increase the mechanical strength of the end cover and make the pole post structure more robust.

[0006] According to some embodiments of the present invention, the tooth-like structure is configured as annular teeth, the annular teeth are arranged around the axis of the second column segment, and each of the annular teeth is nested inside and outside along the radial direction of the second column segment.

[0007] According to some embodiments of the present invention, the annular teeth are provided with at least three.

[0008] According to some embodiments of the present invention, the top of the riveting block is provided with an upward-facing receiving groove, the bottom wall of the receiving groove is provided with a first through hole, and the riveting part is riveted into the receiving groove.

[0009] According to some embodiments of the present invention, the top surface of the riveting part is flush with the opening of the receiving groove.

[0010] According to some embodiments of the present invention, a riveting groove is provided in the middle of the top surface of the riveting part.

[0011] According to some embodiments of the present invention, a sealing ring is also included, which is disposed between the abutment platform and the cover plate. The cover plate has a second through hole, and the second column segment passes through the second through hole. The sealing ring includes a first annular portion and a second annular portion. The first annular portion extends radially, and the second annular portion extends axially. The second annular portion is disposed within the inner ring of the first annular portion. The second annular portion abuts against the inner sidewall of the second through hole and the peripheral wall of the second column segment. The first annular portion abuts against the abutment platform and the bottom of the cover plate.

[0012] According to some embodiments of the present invention, the upper insulating member has an upward-facing mounting groove, the mounting groove is provided with a plurality of first positioning parts, the first positioning parts are connected to the bottom wall and inner side wall of the mounting groove, and the top surface height of the first positioning part is lower than the groove opening height of the mounting groove, the riveting block is provided with a plurality of first positioning grooves penetrating its side wall and bottom wall, the first positioning grooves can be matched and positioned one by one with the first positioning parts.

[0013] According to some embodiments of the present invention, the bottom of the upper insulating member is provided with a plurality of second positioning parts, and the top surface of the cover plate is provided with a plurality of second positioning grooves, wherein the second positioning parts can be positioned in a one-to-one correspondence with the second positioning grooves.

[0014] According to a second aspect of the present invention, the battery includes a battery employing a battery cover assembly for reducing battery internal resistance as described above.

[0015] The battery according to the present invention has at least the following beneficial effects: by using the above-mentioned battery cover assembly, the internal resistance of the battery can be reduced, and the mechanical strength of the battery end cover can be increased, making the connection more secure.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 These are schematic diagrams of some embodiments of the battery cover assembly of this utility model; Figure 2 for Figure 1 Exploded view; Figure 3 for Figure 1 A sectional view of the structure; Figure 4 This is a schematic diagram of the pole structure.

[0018] Figure label: The pole post 100, the post body 110, the first post section 111, the second post section 112, the ring tooth 113, the riveting part 120, the riveting groove 121, and the abutment platform 130; Riveting block 200, first through hole 210, receiving groove 220, first positioning groove 230; Cover plate 300, second positioning groove 310, second through hole 320; Lower insulation component 400; Upper insulating component 500, mounting groove 510, first positioning part 511, second positioning part 520; Extreme displacement 600; Sealing ring 700, first annular portion 710, second annular portion 720. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Reference Figures 1 to 4According to a first aspect of the present invention, a battery cover plate 300 assembly for reducing battery internal resistance includes a terminal post 100, a riveting block 200, a cover plate 300, a lower insulating member 400, an upper insulating member 500, and a terminal array 600. The terminal post 100 includes a post body 110, a riveting portion 120, and an abutment platform 130. The post body 110 includes a first post segment 111 and a second post segment 112 coaxially arranged. The first post segment 111 is located at the top of the second post segment 112, and the diameter of the first post segment 111 is smaller than the diameter of the second post segment 112. The riveting portion 120 is located at the upper end of the first post segment 111, and the abutment platform 130 is located at the second post segment 112. At the lower end of 12, multiple toothed structures are provided on the annular surface of the top of the second column segment 112. The middle of the riveting block 200 has a first through hole 210 that runs vertically through it. The first column segment 111 passes through the first through hole 210. The toothed structures are pressed against the bottom wall of the riveting block 200. The riveting part 120 is riveted to the top of the riveting block 200. The main body 110 of the cover plate 300 passes through the cover plate 300. The lower insulating member 400 is located between the abutment platform 130 and the bottom of the cover plate 300. The upper insulating member 500 is located between the top of the cover plate 300 and the riveting block 200. The pole row 600 is connected to the bottom of the lower insulating member 400. The bottom of the abutment platform 130 abuts against the top of the pole row 600. The first column segment 111 passes through the first through hole 210 of the riveting block 200. The toothed structure on the annular top surface of the second column segment 112 can abut against the bottom wall of the riveting block 200. When riveting the top of the first column segment 111, the riveting part 120 and the toothed structure can press tightly against the riveting block 200, and the toothed structure can engage with the riveting block 200. The gap between the pole post 100 and the riveting block 200 is reduced, which can reduce the internal resistance of the battery. The engaging structure can increase the mechanical strength of the end cap, and the pole post 100 structure is more robust.

[0023] Specifically, an upper insulating member 500 can be installed on the top of the cover plate 300, and a lower insulating member 400 can be installed on the bottom. A riveting block 200 is provided on the upper insulating member 500, and the pole post 100 can be inserted upwards. The abutment platform 130 abuts against the lower insulating member 400. The first column segment 111 can pass through the first through hole 210 of the riveting block 200. The top of the first column segment 111 can be riveted to form a riveting part 120. During riveting, the toothed structure can engage with the riveting block 200, so that the pole post 100 and the riveting block 200 can make full contact, improve the mechanical strength of the connection, and reduce the resistance.

[0024] Reference Figure 4In some embodiments of this utility model, the toothed structure is configured as annular teeth 113, which surround the axis of the second column segment 112, and each annular tooth 113 is nested inside and outside along the radial direction of the second column segment 112. Specifically, the annular teeth 113 are circular and protrude upward on the top surface of the second column segment 112, and the annular teeth 113 may be configured with triangular protrusions to facilitate processing. During riveting, each annular tooth 113 can tightly engage with the riveting block 200, which can improve the connection strength, reduce gaps, and lower resistance.

[0025] Reference Figure 4 In some embodiments of this utility model, at least three annular teeth 113 are provided. Specifically, three annular teeth 113 can be provided, which can maintain a certain size and provide multiple biting points, resulting in a good biting effect.

[0026] Reference Figures 2 to 3 In some embodiments of this utility model, the top of the riveting block 200 is provided with an upward-facing receiving groove 220, and the bottom wall of the receiving groove 220 is provided with a first through hole 210. The riveting part 120 is riveted into the receiving groove 220. Specifically, a circular receiving groove 220 can be provided in the middle of the top surface of the riveting block 200. The receiving groove 220 and the first through hole 210 are coaxially arranged and interconnected. When the pole post 100 passes through the first through hole 210 for riveting, the deformed riveting part 120 can fill the receiving groove 220 to provide sufficient deformation space and improve mechanical strength.

[0027] Reference Figure 3 In some embodiments of this utility model, the top surface of the riveting part 120 is flush with the opening of the receiving groove 220. This ensures that the riveting part 120 is in full contact with the receiving groove 220, and the flush-surfaced pole post 100 terminal can be easily connected to an external copper busbar.

[0028] Reference Figures 1 to 4 In some embodiments of this utility model, a riveting groove 121 is provided in the middle of the top surface of the riveting part 120. Specifically, the riveting head can press against the riveting groove 121, so that the pole post 100 can generate a horizontal compressive expansion force after being subjected to force, which can increase the deformation of the upper end surface of the pole post 100, that is, it can fully form the expanded riveting part 120, and the connection is more secure.

[0029] Reference Figures 2 to 3In some embodiments of this utility model, a sealing ring 700 is also included. The sealing ring 700 is disposed between the abutment platform 130 and the cover plate 300. The cover plate 300 is provided with a second through hole 320. The second column segment 112 passes through the second through hole 320. The sealing ring 700 includes a first annular portion 710 and a second annular portion 720. The first annular portion 710 extends radially, and the second annular portion 720 extends axially. The second annular portion 720 is disposed within the inner ring of the first annular portion 710. The second annular portion 720 abuts between the inner sidewall of the second through hole 320 and the peripheral wall of the second column segment 112. The first annular portion 710 abuts between the abutment platform 130 and the bottom of the cover plate 300. Specifically, the diameter of the second through hole 320 is larger than the diameter of the second column segment 112. The first annular portion 710 is inserted between the side wall of the second through hole 320 and the side wall of the second column segment 112 to position the pole post 100, seal the gap between the pole post 100 and the second through hole 320, and has an insulating function. The second annular portion 720 can seal and insulate the gap between the abutment platform 130 and the cover plate 300.

[0030] Reference Figure 2 In some embodiments of this utility model, the upper insulating member 500 has an upward-facing mounting groove 510. The mounting groove 510 is provided with a plurality of first positioning portions 511. The first positioning portions 511 are connected to the bottom wall and inner side wall of the mounting groove 510, and the top surface height of the first positioning portion 511 is lower than the groove opening height of the mounting groove 510. The riveting block 200 is provided with a plurality of first positioning grooves 230 penetrating its side wall and bottom wall. The first positioning grooves 230 can be positioned in a one-to-one correspondence with the first positioning portions 511. Specifically, when installing the riveting block 200, the first positioning grooves 230 can be aligned and positioned with the first positioning portions 511, which is convenient for assembly. The upper insulating member 500 can be configured as a frustum, the mounting groove 510 is a circular groove, and the first positioning portions 511 can be evenly spaced around the axis of the upper insulating member 500. The first positioning portions 511 only protrude below the groove opening of the mounting groove 510 to avoid occupying the space of the riveting block 200, so as to maintain the contact area of ​​the top surface of the riveting block 200.

[0031] Reference Figures 2 to 3 In some embodiments of this utility model, the bottom of the upper insulating member 500 is provided with a plurality of second positioning portions 520, and the top surface of the cover plate 300 is provided with a plurality of second positioning grooves 310. The second positioning portions 520 can be positioned in a one-to-one correspondence with the second positioning grooves 310. Specifically, four second positioning portions 520 can be provided and arranged in a cross shape, and the shape of the second positioning grooves 310 matches the direction of the second positioning portions 520. During installation, the upper insulating member 500 can be rotated until the second positioning portions 520 are aligned with the second positioning grooves 310 to achieve positioning, making assembly relatively convenient.

[0032] The battery according to a second aspect embodiment of the present invention includes a battery cover plate 300 assembly for reducing battery internal resistance as described above. By employing the battery cover plate 300 assembly, the battery internal resistance can be reduced, battery heat generation can be decreased, and the mechanical strength of the battery end cap can be increased, resulting in a more secure connection.

[0033] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery cover assembly for reducing battery internal resistance, characterized in that, include: The pole post (100) includes a pole body (110), a riveting part (120), and an abutment platform (130). The pole body (110) includes a first pole segment (111) and a second pole segment (112) arranged coaxially. The first pole segment (111) is located at the top of the second pole segment (112), and the diameter of the first pole segment (111) is smaller than the diameter of the second pole segment (112). The riveting part (120) is located at the upper end of the first pole segment (111), and the abutment platform (130) is located at the lower end of the second pole segment (112). A plurality of tooth-like structures are provided on the annular surface at the top of the second pole segment (112). The rivet block (200) has a first through hole (210) running vertically through the middle, the first column segment (111) passes through the first through hole (210), the toothed structure is pressed against the bottom wall of the rivet block (200), and the rivet part (120) is riveted to the top of the rivet block (200). Cover plate (300), the column body (110) passes through the cover plate (300); The lower insulating member (400) is disposed between the bottom of the abutment platform (130) and the cover plate (300); An upper insulating component (500) is disposed between the top of the cover plate (300) and the riveting block (200); The electrode row (600) is connected to the bottom of the lower insulating member (400), and the bottom of the abutment platform (130) abuts against the top of the electrode row (600).

2. The battery cover assembly for reducing battery internal resistance according to claim 1, characterized in that, The tooth-like structure is configured as an annular tooth (113), which is arranged around the axis of the second column segment (112), and each of the annular teeth (113) is nested inside and outside along the radial direction of the second column segment (112).

3. A battery cover assembly for reducing battery internal resistance according to claim 2, characterized in that, The annular teeth (113) are provided in at least three.

4. A battery cover assembly for reducing battery internal resistance according to claim 1, characterized in that, The top of the rivet block (200) is provided with an upward-facing receiving groove (220), and the bottom wall of the receiving groove (220) is provided with the first through hole (210). The rivet part (120) is riveted into the receiving groove (220).

5. A battery cover assembly for reducing battery internal resistance according to claim 4, characterized in that, The top surface of the riveting part (120) is flush with the opening of the receiving groove (220).

6. A battery cover assembly for reducing battery internal resistance according to claim 1, characterized in that, The riveting part (120) has a riveting groove (121) in the middle of its top surface.

7. A battery cover assembly for reducing battery internal resistance according to claim 1, characterized in that, It also includes a sealing ring (700), which is disposed between the abutment platform (130) and the cover plate (300). The cover plate (300) is provided with a second through hole (320), and the second column segment (112) passes through the second through hole (320). The sealing ring (700) includes a first annular portion (710) and a second annular portion (720). The first annular portion (710) extends radially, and the second annular portion (720) extends axially. The second annular portion (720) is disposed in the inner ring of the first annular portion (710). The second annular portion (720) abuts between the inner sidewall of the second through hole (320) and the peripheral wall of the second column segment (112). The first annular portion (710) abuts between the abutment platform (130) and the bottom of the cover plate (300).

8. A battery cover assembly for reducing battery internal resistance according to claim 1, characterized in that, The upper insulating member (500) has an upward-facing mounting groove (510). The mounting groove (510) is provided with a plurality of first positioning parts (511). The first positioning parts (511) are connected to the bottom wall and inner side wall of the mounting groove (510). The top surface height of the first positioning part (511) is lower than the groove height of the mounting groove (510). The riveting block (200) is provided with a plurality of first positioning grooves (230) penetrating its side wall and bottom wall. The first positioning grooves (230) can be positioned in a one-to-one correspondence with the first positioning parts (511).

9. A battery cover assembly for reducing battery internal resistance according to claim 1, characterized in that, The bottom of the upper insulating component (500) is provided with a plurality of second positioning parts (520), and the top surface of the cover plate (300) is provided with a plurality of second positioning grooves (310). The second positioning parts (520) can be positioned in a one-to-one correspondence with the second positioning grooves (310).

10. A battery, characterized in that, The battery cover assembly for reducing battery internal resistance is included in any one of claims 1-9.

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