Battery cover plate and battery

Abstract

A battery cover plate and a battery. The battery comprises a cell and a battery cover plate. The battery cover plate is electrically connected to a tab of the cell. The battery cover plate comprises a top cover sheet (1), pole members (2), and insulating members (3). The top cover sheet (1) is provided with pole slots (11) and a pressing flange (12) arranged around the pole slots (11). The pole members (2) are arranged in the pole slots (11). The pressing flange (12) can limit the pole members (2) in the pole slots (11). Each insulating member (3) surrounds the periphery of a corresponding pole member (2) and is located between the corresponding pole member (2) and a corresponding pole slot (11). The insulating members (3) can isolate the pole members (2) from the top cover sheet (1).

Description

Battery cover and battery

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on August 15, 2023, with application number 202322184718.8, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, for example, to a battery cover and a battery. Background Art

[0003] Batteries are a common source of power in modern society. As an important component of the battery, the battery cover is responsible for sealing the battery, providing temperature protection and a safety valve for the battery, and also serves as a positive or negative conductive terminal. In related technologies, the battery cover adopts a flange structure, which has the advantages of simple structure and low cost. However, since the top cover is directly flanged, the pole and the flange are very close, which can easily cause the risk of high voltage and the risk of causing a battery short circuit.

[0004] Summary of the Invention

[0005] The present application provides a battery cover plate, which isolates the pole piece from the top cover piece through an insulating piece, thereby preventing the pole piece from contacting the top cover piece and causing high voltage failure or short circuit.

[0006] The present application provides a battery with good insulation performance, which can avoid battery short circuit and improve battery safety performance.

[0007] An embodiment of the present application provides a battery cover, comprising: a top cover sheet, the top cover sheet being provided with a pole slot and a pressed flange arranged around the pole slot; a pole piece, the pole piece being arranged in the pole slot, the pressed flange being capable of confining the pole piece in the pole slot; an insulating piece, the insulating piece being arranged around the periphery of the pole piece and being located between the pole piece and the pole slot, the insulating piece being capable of isolating the pole piece from the top cover sheet.

[0008] In one embodiment, the insulating member is wrapped around the pressed flange.

[0009] In one embodiment, the pole member includes a pole body and a pole convex ring, the pole convex ring is arranged around the circumference of the pole body, the pole body is connected to the pole convex ring, the insulating member is sleeved on the outer circumference of the pole convex ring, and the insulating member abuts against the inner side wall of the pole groove and the pressed flange.

[0010] In one embodiment, the pressed flange protrudes above the pole protrusion ring to limit the upward movement of the pole member.

[0011] In one embodiment, the insulating member is an integrally formed structure.

[0012] In one embodiment, the battery cover plate further includes a sealing member, which is passed through the pole slot, one end of the sealing member abuts against the pole member, and the other end of the sealing member abuts against the bottom of the pole slot to seal the gap between the pole member and the bottom of the pole slot.

[0013] In one embodiment, the sealing member includes a connected planar portion and an insertion portion, the insertion portion is inserted into the pole slot, a first end of the planar portion is pressed against the bottom of the pole slot, and a second end of the planar portion is in contact with the pole member.

[0014] In one embodiment, the seal is configured as an annular structure, the first end of the planar portion is provided with a press-fit groove arranged around the outer circumference of the insertion portion, and the bottom of the pole slot is provided with a press-fit convex ring capable of extending into the press-fit groove.

[0015] In one embodiment, the battery cover plate further includes an insulating shell, and the insulating shell is connected to a side of the top cover plate facing away from the pole slot.

[0016] A battery according to an embodiment of the present application includes a battery cell, a battery shell, and the battery cover. The battery cell is disposed in the battery shell, and the tabs of the battery cell are electrically connected to the pole piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present application will be further described in detail below based on the accompanying drawings and examples;

[0018] Figure 1 is an axonometric view of the battery cover;

[0019] FIG2 is a partial schematic diagram of a battery cover;

[0020] FIG3 is a partial schematic diagram of the battery cover during the first stage of assembly;

[0021] FIG. 4 is a partial schematic diagram of the battery cover in the second stage of the assembly step.

[0022] In the picture:

[0023] 1. Top cover; 2. Pole member; 3. Insulation member; 4. Seal; 5. Insulation housing; 11. Pole slot; 12. Press-fit flange; 13. Press-fit cam; 21. Pole body; 22. Pole cam; 41. Plane portion; 42. Insertion portion; 43. Press-fit slot; 31. Insulation cam. DETAILED DESCRIPTION

[0024] The following describes the technical solutions of the embodiments of the present application in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present application.

[0025] In the description of this application, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Persons of ordinary skill in the art will understand the meanings of these terms in this application in a variety of contexts.

[0026] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature's horizontal height is higher than the second feature's horizontal height. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature's horizontal height is lower than the second feature's horizontal height.

[0027] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0028] Throughout this specification, references to terms such as "an embodiment" or "example" mean that the features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0029] The technical solution of this application is explained below with reference to the accompanying drawings and through specific implementation methods.

[0030] The present application provides a battery, including a battery cell, a battery shell and a battery cover. The battery cell is arranged in the battery shell, and the battery cell's tab is electrically connected to the battery cover. As shown in Figure 1, the battery cover includes a pole piece 2, and the battery cell's tab is electrically connected to the pole piece 2. The battery cover has the function of sealing the battery and providing temperature protection for the battery. At the same time, it acts as a positive or negative conductive terminal through the pole piece 2.

[0031] As shown in FIG2 , the battery cover also includes a top cover sheet 1 and an insulating member 3 . The top cover sheet 1 is provided with a pole slot 11 and a press-fit flange 12 arranged around the pole slot 11 . The pole member 2 is arranged in the pole slot 11 , and the press-fit flange 12 can limit the pole member 2 in the pole slot 11 . For example, the pole member 2 includes a pole body 21 and a pole convex ring 22 . The pole convex ring 22 is arranged around the circumference of the pole body 21 . The pole body 21 and the pole convex ring 22 are an integrated structure. The bottom of the pole body 21 can abut against the tab of the battery cell, thereby achieving electrical connection with the battery cell. The press-fit flange 12 protrudes above the pole convex ring 22 to confine the pole convex ring 22 in the pole slot 11 , thereby limiting the axial movement of the pole member 2 . The structure of the press-fit flange 12 can simply and effectively limit the position of the pole member 2 , resulting in a simple structure and low manufacturing cost.

[0032] As shown in Figures 1 and 2, in order to prevent the pole piece 2 from contacting the top cover sheet 1 and causing high voltage failure or short circuit, the battery cover also includes an insulating member 3. The insulating member 3 is arranged around the periphery of the pole piece 2 and is located between the pole piece 2 and the pole slot 11. The insulating member 3 can isolate the pole piece 2 and the top cover sheet 1. Exemplarily, the insulating member 3 is sleeved on the outer periphery of the convex ring of the pole piece 2, and the insulating member 3 abuts the inner side wall of the pole slot 11 and the pressed flange 12. The insulating member 3 completely isolates the pole piece 2 from the top cover sheet 1, preventing the pole piece 2 from contacting the top cover sheet 1 and causing a short circuit or high voltage failure; at the same time, the insulating member 3 is covered outside the pressed flange 12, preventing the top cover sheet 1 from contacting the battery shell and / or the tab and causing a short circuit or high voltage failure.

[0033] The present application provides a battery cover and a battery, wherein the battery cover is electrically connected to the battery tab, the battery cover comprises a top cover sheet, a pole piece and an insulating piece, the pole piece can be electrically connected to the battery tab, the top cover sheet is provided with a pole slot for accommodating the pole piece and a pressed flange arranged around the pole slot, the pressed flange limits the pole piece in the pole slot to prevent the pole piece from moving or falling off, the insulating piece is arranged between the pole piece and the pole slot, the two ends of the insulating piece respectively abut the pole piece and the inner side wall of the pole slot, the insulating piece can completely isolate the pole piece and the top cover sheet, thereby improving the insulation performance of the battery cover sheet, and preventing the pole piece from contacting the top cover sheet to cause high voltage poor performance or short circuit, and the structure is simple and the manufacturing cost is low, and the safety and stability of the battery are improved by improving the insulation performance of the battery.

[0034] As shown in Figure 2, the battery cover also includes a seal 4, which is provided in the pole slot 11, one end of the seal 4 abuts against the pole member 2, and the other end of the seal 4 abuts against the bottom of the pole slot 11 to seal the gap between the pole member 2 and the bottom of the pole slot 11. The seal 4 includes a connected planar portion 41 and an insertion portion 42. The insertion portion 42 is provided in the pole slot 11, the first end of the plane is pressed against the bottom of the pole slot 11, and the second end of the planar portion 41 abuts against the pole member 2; the seal 4 is made of insulating material. On the one hand, the seal 4 can provide waterproof and dustproof protection for the pole member 2, and on the other hand, it can isolate the pole member 2 from the bottom of the pole slot 11 to prevent the bottom of the pole member 2 from contacting the bottom of the pole slot 11 and causing high voltage failure or short circuit.

[0035] Exemplarily, as shown in Figure 2, the seal 4 is configured as an annular structure, the first end of the planar portion 41 is provided with a pressing groove 43 arranged around the outer periphery of the insertion portion 42, and the bottom of the pole slot 11 is provided with a pressing protruding ring 13 that can extend into the pressing groove 43. The insertion and cooperation between the pressing groove 43 and the pressing protruding ring 13 play an assembly positioning role on the one hand, which facilitates the assembly of the battery cover. On the other hand, the insertion of the pressing protruding ring 13 into the pressing groove 43 can limit the radial position of the seal 4 in the pole slot 11, and the pole member 2 can limit the axial position of the seal 4 in the pole slot 11, thereby avoiding the position displacement or falling off of the seal 4, resulting in sealing failure or insulation failure.

[0036] Exemplarily, the seal 4 is made of elastic rubber so that both ends of the seal 4 can fit the pole slot 11 and the pole member 2 respectively, so as to improve the sealing performance of the seal 4 .

[0037] As shown in Figure 2, an insulating convex ring 31 is also provided at the bottom of the insulating part 3. The insulating convex ring 31 extends radially inward, and the bottom of the insulating convex ring 31 abuts against the bottom of the pole slot 11. The top of the insulating convex ring 31 abuts against the pole part 2. In order to avoid interference between the insulating convex ring 31 and the seal 4 during assembly, the inner diameter of the insulating convex ring 31 is not less than the outer diameter of the seal 4. At the same time, the top surface of the insulating convex ring 31 is not higher than the top surface of the seal 4. On the one hand, the insulating convex ring 31 plays the role of axial positioning, and on the other hand, it can further improve the insulation performance of the battery cover.

[0038] For example, the insulating member 3 may be made of insulating materials such as polypropylene.

[0039] As shown in Figure 2, the battery cover also includes an insulating shell 5, which is connected to the side of the top cover 1 away from the pole slot 11, further improving the sealing and insulation performance of the battery cover, while protecting the top cover 1, reducing the collision and wear between the top cover and the outside world, and improving the service life of the battery cover.

[0040] The assembly and manufacturing of the battery cover is mainly divided into three steps:

[0041] Step 1: As shown in Figure 3, the press-fit flange 12 is in a vertical state. The seal 4 is installed in the pole slot 11 by positioning the press-fit convex ring 13 and the press-fit groove 43. The cylindrical insulating member 3 with the insulating convex ring 31 is slid into the pole slot 11 along the inner side wall of the pole slot 11. The bottom of the insulating convex ring 31 abuts against the bottom of the pole slot 11. The pole member 2 slides into the pole slot 11 along the inner side wall of the insulating member 3. The bottom of the pole member 2 abuts against the top of the seal 4.

[0042] Step 2: As shown in FIG4 , the pressing flange 12 is rolled inwardly by a rolling machine so that the pressing flange 12 is bent inwardly and parallel to the pole convex ring 22 , thereby causing the insulating member 3 to deform synchronously, so that the sealing member 4 , the insulating member 3 and the pole member 2 are fixed in the pole slot 11 ;

[0043] Step 3: As shown in FIG2 , the insulating member 3 is bonded and fixed to the outer side surface of the pressed flange 12 by hot pressing.

[0044] In addition, the above are only optional embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that a variety of obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present application. Therefore, although the present application is described by the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A battery cover, comprising: A top cover sheet (1), wherein the top cover sheet (1) is provided with a pole slot (11) and a pressed flange (12) arranged around the pole slot (11); A pole piece (2), the pole piece (2) being arranged in the pole slot (11), and the pressed flange (12) being capable of confining the pole piece (2) in the pole slot (11); An insulating member (3) is arranged around the periphery of the pole member (2) and is located between the pole member (2) and the pole slot (11); the insulating member (3) is capable of isolating the pole member (2) and the top cover sheet (1).

2. The battery cover according to claim 1, wherein: The insulating member (3) is wrapped around the outside of the pressed flange (12).

3. The battery cover according to claim 2, wherein: The pole piece (2) comprises a pole body (21) and a pole convex ring (22); the pole convex ring (22) is arranged around the circumference of the pole body (21); the pole body (21) is connected to the pole convex ring (22); the insulating piece (3) is sleeved on the outer circumference of the pole convex ring (22); the insulating piece (3) abuts against the inner side wall of the pole slot (11) and the pressed flange (12).

4. The battery cover according to claim 3, wherein: The pressed flange (12) protrudes above the pole convex ring (22) to limit the pole piece (2) from moving upward.

5. The battery cover according to claim 1, wherein: The insulating member (3) is an integrally formed structure.

6. The battery cover according to any one of claims 1 to 5, further comprising a sealing member (4), wherein the sealing member (4) is inserted into the pole slot (11), one end of the sealing member (4) abuts against the pole member (2), and the other end of the sealing member (4) abuts against the bottom of the pole slot (11) to seal the gap between the pole member (2) and the bottom of the pole slot (11).

7. The battery cover according to claim 6, wherein: The sealing member (4) comprises a connected planar portion (41) and an insertion portion (42); the insertion portion (42) is inserted into the pole slot (11); a first end of the planar portion (41) is pressed against the bottom of the pole slot (11); and a second end of the planar portion (41) is in contact with the pole member (2).

8. The battery cover according to claim 7, wherein: The sealing member (4) is configured as an annular structure, the first end of the planar portion (41) is provided with a pressing groove (43) arranged around the outer periphery of the insertion portion (42), and the bottom of the pole groove (11) is provided with a pressing convex ring (13) capable of extending into the pressing groove (43).

9. The battery cover plate according to any one of claims 1 to 5, further comprising an insulating shell (5), wherein the insulating shell (5) is connected to a side of the top cover sheet (1) facing away from the pole slot (11).

10. A battery, comprising a battery cell, a battery shell and a battery cover as claimed in any one of claims 1 to 9, wherein the battery cell is arranged in the battery shell, and the electrode lug of the battery cell is electrically connected to the electrode column (2).

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