Clamping connection type cover plate, battery shell, battery and battery pack

Abstract

The utility model belongs to the technical field of batteries, and discloses a clamping connection type cover plate, a battery shell, a battery and a battery pack. The clamping connection type cover plate comprises a cover plate body, a first plastic part, a second plastic part and a clamping part. The first plastic part and the second plastic part are arranged on the two sides of the cover plate body respectively, a tab shaping structure is arranged on the side, deviating from the cover plate body, of the second plastic part, and a tab can be folded in the tab shaping structure and turned to the side, deviating from the cover plate body, of the first plastic part through the second plastic part and the cover plate body. The clamping piece can penetrate through and clamp the first plastic piece and the cover plate body, or the cover plate body and the second plastic piece, or the first plastic piece, the cover plate body and the second plastic piece. The clamping connection type cover plate can normalize the shape of the tab, enlarge the internal space of the battery shell and improve the reliability of connection and assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a clamping connection type cover plate, a battery shell, a battery and a battery pack. Background Art

[0002] The first plastic part of the traditional battery cover is arranged on the outside of the cover body, and the second plastic part is thicker and arranged on the side of the cover body away from the first plastic part, where the pole and the tab are arranged inside the battery shell.

[0003] This arrangement hinders the utilization of the internal space of the battery housing, and the collapsed tabs have a poor appearance, which can easily cause short circuits. Furthermore, in this arrangement, the first plastic part and the cover body must be connected using rivets, which lacks reliability and cannot guarantee the connection between the second plastic part and the cover body.

[0004] Therefore, there is an urgent need for a clamping connection type cover plate, battery shell, battery and battery pack to solve the above problems. Utility Model Content

[0005] According to one aspect of the present invention, the purpose is to provide a clamping connection type cover plate, which can regularize the shape of the tabs, expand the internal space of the battery shell, and improve the reliability of the connection assembly.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] Clip-on cover, comprising:

[0008] Cover plate body;

[0009] a first plastic part and a second plastic part, wherein the first plastic part and the second plastic part are respectively arranged on both sides of the cover plate body; a tab shaping structure is provided on a side of the second plastic part away from the cover plate body; the tab can be folded into the tab shaping structure and folded through the second plastic part and the cover plate body to a side of the first plastic part away from the cover plate body;

[0010] The clamping member can penetrate and clamp the first plastic member and the cover body, or the cover body and the second plastic member, or the first plastic member, the cover body and the second plastic member.

[0011] As a preferred solution of the clamping connection type cover provided by the present invention, the cover body is provided with a cover tab opening, the first plastic part is provided with a first plastic part tab opening, the second plastic part is provided with a second plastic part tab opening, the cover tab opening, the first plastic part tab opening and the second plastic part tab opening are arranged correspondingly, and the tab can be folded over the first plastic part through the second plastic part tab opening, the cover tab opening and the first plastic part tab opening.

[0012] As a preferred solution of the clamping connection type cover provided by the present invention, the cover body is provided with a receiving groove, the first plastic part is received in the receiving groove, and the cover tab opening is provided at the bottom of the receiving groove.

[0013] As a preferred solution of the clamping connection type cover provided by the present invention, the clamping member includes a supporting portion and clamping portions provided on opposite sides of the supporting portion; the supporting portion can be abutted against the first plastic part, and the clamping portion can sequentially pass through the first plastic part and the cover body and clamped to the second plastic part; or,

[0014] The abutting portion can abut against the first plastic part, and the clamping portion can pass through the first plastic part and clamp the cover body; or,

[0015] The abutting portion can abut against the cover body, and the clamping portion can be clamped on the second plastic part through the cover body.

[0016] As a preferred solution of the clamping connection type cover provided by the present invention, the end of the clamping portion away from the abutting portion forms a flange, and the flange can be clamped on the side of the cover body away from the first plastic part, or the side of the second plastic part away from the cover body.

[0017] As a preferred solution of the clamping connection cover provided by the present invention, the first plastic part is provided with an embedding groove, the abutting portion is arranged in the embedding groove, and the upper end surface of the abutting portion is not higher than the upper end surface of the first plastic part.

[0018] As a preferred solution of the clamping connection type cover provided by the present invention, the clamping member is an epoxy resin member, a metal member and / or a plastic member.

[0019] According to another aspect of the present invention, the purpose is to provide a battery shell, which includes a shell and a clamping and connecting cover as described in any one of the above schemes, and the clamping and connecting cover is arranged at the opening of the shell to form a battery cell accommodating space.

[0020] According to another aspect of the present invention, the purpose is to provide a battery, which includes a battery cell and a battery shell as described in the above scheme, the battery cell is arranged in the battery shell, and the tabs of the battery cell can be retracted to the tab shaping structure and folded to the side of the first plastic part away from the cover body through the second plastic part and the cover body.

[0021] According to another aspect of the present invention, an object is to provide a battery pack, which includes several batteries as described in the above solution.

[0022] Beneficial effects of the utility model:

[0023] The clamping connection type cover provided by the present invention includes a cover body, a first plastic part, a second plastic part, and a clamping part. The first plastic part and the second plastic part are respectively arranged on both sides of the cover body, and a tab shaping structure is provided on the side of the second plastic part facing away from the cover body. The tab can be folded into the tab shaping structure and folded through the second plastic part and the cover body to the side of the first plastic part facing away from the cover body. In other words, the tab shaping structure can regularize the shape of the tab, avoid the short circuit problem caused by the poor shape of the tab after folding, and a part of the tab can be arranged outside the battery shell, thereby expanding the internal space of the battery shell. The clamping part can pass through and clamp the first plastic part and the cover body, or, the cover body and the second plastic part, or, the first plastic part, the cover body, and the second plastic part. That is to say, through the clamping part, a reliable connection between the cover body, the first plastic part and the second plastic part can be achieved, or a reliable connection between the cover body and the first plastic part can be achieved, or a reliable connection between the cover body and the second plastic part can be achieved, thereby improving the reliability of the connection assembly and improving the structural stability of the entire clamping connection cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the disassembled clamping connection cover provided by the embodiment of the utility model. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the disassembled clamping connection cover provided by the embodiment of the utility model. Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the structure of the clamping connection cover provided by the embodiment of the utility model Figure 1 ;

[0027] Figure 4 This is a schematic diagram of the structure of the clamping connection cover provided by the embodiment of the utility model Figure 2 ;

[0028] Figure 5This is a top view of a clamping connection type cover provided by an embodiment of the present utility model;

[0029] Figure 6 yes Figure 5 Cross-sectional view along the AA axis;

[0030] Figure 7 yes Figure 6 A magnified view of the structure marked B.

[0031] In the picture:

[0032] 100, cover plate body; 110, cover plate tab opening; 120, receiving groove; 130, liquid injection hole; 140, explosion-proof valve;

[0033] 200, first plastic part; 210, embedding groove; 220, tab opening of first plastic part;

[0034] 300, second plastic part; 310, tab shaping structure; 320, mounting groove; 330, tab opening of second plastic part;

[0035] 400, clamping member; 410, abutting portion; 420, clamping portion; 421, flange. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0037] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0038] In the present invention, 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 may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0040] This embodiment provides a clamping cover, a battery case, a battery, and a battery pack. The battery case includes a housing and the clamping cover provided in this embodiment. The clamping cover is positioned at an opening in the housing, and the two together form a cell storage space. The battery includes a cell and the battery case described above, with the cell being positioned within the cell storage space within the battery case. The battery pack provided in this embodiment includes several batteries provided in this embodiment.

[0041] Figure 1 Shows the exploded view of the clamping connection cover provided by the embodiment of the present invention Figure 1 ; Figure 2 Shows the exploded view of the clamping connection cover provided by the embodiment of the present invention Figure 2 ; Figure 3 The structure diagram of the clamping connection cover provided by the embodiment of the utility model is shown as follows Figure 1 ; Figure 4 The structure diagram of the clamping connection cover provided by the embodiment of the utility model is shown as follows Figure 2 . Reference Figure 1-Figure 4 The clamping connection type cover provided in this embodiment includes a cover body 100 , a first plastic part 200 , a second plastic part 300 and a clamping part 400 .

[0042] Specifically, the first plastic part 200 and the second plastic part 300 are respectively disposed on either side of the cover body 100. A tab shaping structure 310 is provided on the side of the second plastic part 300 facing away from the cover body 100. The tabs of the battery cell can be fitted and folded together within the tab shaping structure 310 and then folded through the second plastic part 300 and the cover body 100 to the side of the first plastic part 200 facing away from the cover body 100. The tab shaping structure 310 regularizes the tab shape, preventing short circuits caused by poorly shaped tabs after folding. Furthermore, a portion of the tab can be positioned outside the battery case, thereby expanding the internal space of the battery case.

[0043] Specifically, the tab shaping structure 310 may be one or more, and its number is selected according to the arrangement of the tabs and the actual needs of the battery. In this embodiment, the tab shaping structure 310 is multiple, and the multiple tab shaping structures 310 are arranged in two groups along the length direction of the second plastic part 300. The multiple tab shaping structures 310 in the same group are arranged side by side along the width direction of the second plastic part 300, such as Figure 4 and Figure 6 shown.

[0044] Figure 5 Shows a top view of the clamping connection cover provided by the embodiment of the present invention, and continues to refer to Figure 1-Figure 3 and Figure 5The cover plate body 100 defines a cover plate tab opening 110, the first plastic part 200 defines a first plastic part tab opening 220, and the second plastic part 300 defines a second plastic part tab opening 330. The cover plate tab opening 110, the first plastic part tab opening 220, and the second plastic part tab opening 330 are correspondingly arranged. The tab can pass through the second plastic part tab opening 330, the cover plate tab opening 110, and the first plastic part tab opening 220, fold over the top of the first plastic part 200, and connect to the positive or negative electrode of the battery. If only a positive electrode or only a negative electrode is provided on the cover plate body 100, the number N of cover plate tab openings 110 is ≥ 1. If the cover plate body 100 has a positive electrode on one side and a negative electrode on the other side in its longitudinal direction, the number N of cover plate tab openings 110 on the positive and negative sides is ≥ 1. That is, the tab corresponding to the positive or negative electrode can extend out of the battery case through a set of corresponding cover tab openings 110 and first plastic part tab openings 220, or can extend out of the battery case through multiple sets of corresponding cover tab openings 110 and first plastic part tab openings 220. In this embodiment, the cover body 100 is provided with two cover tab openings 110 corresponding to the positive or negative electrode on the cover body 100, and correspondingly, the first plastic part 200 is provided with two first plastic part tab openings 220, which correspond one to the other. The cover tab openings 110 are opened along the length direction of the cover body 100, and the two cover tab openings 110 are spaced apart along the width direction of the cover body 100.

[0045] More specifically, the cover body 100 defines a receiving groove 120 on a side facing away from the second plastic component 300. The first plastic component 200 is received in the receiving groove 120, and the cover tab opening 110 is formed at the bottom of the receiving groove 120. The distance between the upper end surface of the first plastic component 200 and the notch of the receiving groove 120, that is, the upper end surface of the cover body 100, is 0-0.5 mm. If this distance is too small, it is not conducive to improving space utilization. If this distance is too large, it will reduce the structural strength of the cover body 100.

[0046] More specifically, in this embodiment, the cover body 100 may or may not have a liquid injection hole 130. When the liquid injection hole 130 is provided, the liquid injection hole 130 may be located near the positive electrode side of the cover body 100, near the negative electrode side of the cover body 100, or between the positive and negative electrodes on the cover body 100.

[0047] More specifically, in this embodiment, the cover body 100 may be provided with an explosion-proof valve 140. The explosion-proof valve 140 is specifically provided between the positive and negative electrodes on the cover body 100. The notch on the explosion-proof valve 140 may be provided on the side of the cover body 100 facing the battery cell accommodation space, or on the side of the cover body 100 facing away from the battery cell accommodation space.

[0048] Reference Figure 1 and Figure 3 The first plastic part 200 is provided with a flange along its circumference, which can increase the contact area between the first plastic part 200 and the cover body 100. It should be noted that in this embodiment, the width of the flange is in the range of 0-10 mm. If the width of the flange is too large, it will lead to an increase in the weight of the first plastic part 200, the amount of material used, and the manufacturing cost.

[0049] Reference Figure 1 、 Figure 3 and Figure 5 A portion of the clamping member 400 can sequentially pass through the first plastic part tab opening 220 , the cover plate tab opening 110 and the second plastic part tab opening 330 and be clamped on the side of the second plastic part 300 away from the cover plate body 100 .

[0050] It should be noted that, in this embodiment, the first plastic part 200 and the second plastic part 300 may both adopt a split structure or an integrated structure, and this embodiment does not impose any limitation thereto.

[0051] Figure 7 Show Figure 6 A partial enlarged view of the structure marked as B. Figure 1-Figure 7 The clamping member 400 can penetrate and clamp the first plastic part 200 and the cover body 100, or the cover body 100 and the second plastic part 300, or the first plastic part 200, the cover body 100, and the second plastic part 300. In other words, the clamping member 400 can achieve a reliable connection between the cover body 100, the first plastic part 200, and the second plastic part 300, or achieve a reliable connection between the cover body 100 and the first plastic part 200, or achieve a reliable connection between the cover body 100 and the first plastic part 200, or achieve a reliable connection between the cover body 100 and the second plastic part 300, thereby improving the reliability of the connection assembly and the structural stability of the entire clamp-connected cover.

[0052] Specifically, the clamping member 400 includes a supporting portion 410 and clamping portions 420 disposed on opposite sides of the supporting portion 410. The supporting portion 410 and the clamping portion 420 are both plate-shaped structures, and the clamping portion 420 has a flange 421 formed at one end away from the supporting portion 410. The flange 421 can be clamped to the side of the cover body 100 away from the first plastic part 200, or the side of the second plastic part 300 away from the cover body 100. In this embodiment, one of the clamping portions 420 can sequentially pass through the first plastic part tab opening 220, the cover plate tab opening 110 and the second plastic part tab opening 330 corresponding to one side in the width direction of the cover body 100, and extend into the battery shell, so that the flange 421 set at the end of this clamping portion 420 can be clamped on the side of the second plastic part 300 away from the cover body 100; the other clamping portion 420 can sequentially pass through the first plastic part tab opening 220, the cover plate tab opening 110 and the second plastic part tab opening 330 corresponding to the other side in the width direction of the cover body 100, and extend into the battery shell, so that the flange 421 set at the end of this clamping portion 420 can be clamped on the side of the second plastic part 300 away from the cover body 100.

[0053] When the clamping member 400 is used to connect the first plastic part 200 and the cover body 100, the abutting portion 410 can abut against the side of the first plastic part 200 facing away from the cover body 100, the clamping portion 420 can pass through the first plastic part tab opening 220 and the cover tab opening 110, and the flange 421 can be clamped on the side of the cover body 100 facing away from the first plastic part 200.

[0054] When the clamping member 400 is used to connect the cover body 100 and the second plastic part 300, the abutting portion 410 can abut against the side of the cover body 100 facing away from the second plastic part 300, the clamping portion 420 can pass through the cover tab opening 110 and the second plastic part tab opening 330, and the flange 421 can be clamped on the side of the second plastic part 300 facing away from the first plastic part 200.

[0055] When the clamping member 400 is used to connect the first plastic part 200, the cover body 100 and the second plastic part 300, the abutting portion 410 can abut against the side of the first plastic part 200 facing away from the cover body 100, the clamping portion 420 can pass through the first plastic part tab opening 220, the cover tab opening 110 and the second plastic part tab opening 330, and the flange 421 can be clamped on the side of the second plastic part 300 facing away from the first plastic part 200.

[0056] More specifically, in this embodiment, the clamping member 400 is used to connect the first plastic part 200, the cover body 100, and the second plastic part 300. The first plastic part 200 further defines an embedding groove 210 on a side facing away from the cover body 100. The abutment portion 410 is disposed in the embedding groove 210 such that the upper end surface of the abutment portion 410 is no higher than the upper end surface of the first plastic part 200.

[0057] More specifically, a snap-fitting groove 320 is provided on the side of the second plastic part 300 facing away from the cover plate body 100. The snap-fitting groove 320 is specifically provided on the tab shaping structure 310 on one side of the tab opening 330 of the second plastic part. The bottom of the snap-fitting groove 320 is lower than the tab shaping structure 310. After the clamping portion 420 passes through the tab opening 330 of the second plastic part, the flange 421 can be snap-fitted into the snap-fitting groove 320 to prevent the flange 421 from protruding from the tab shaping structure 310 and affecting the retraction of the tab on the tab shaping structure 310.

[0058] Optionally, the clamping member 400 is an epoxy resin member, a metal member, and a plastic member (PP, PET, or PE, etc.), or a combination of these.

[0059] Optionally, the number of the clamping members 400 may be one or more. When multiple clamping members 400 are provided, the multiple clamping members 400 are spaced apart along the length direction of the cover body 100 and are used to connect the first plastic part 200, the cover body 100, and the second plastic part 300, further improving assembly reliability and uniformity of force applied to each component.

[0060] Optionally, the clamping member 400 can be a structure with uniform wall thickness or a structure with unequal wall thickness, which is mainly determined by the specific structure of the battery shell and the battery cell. The thickness range is 0.1mm-2mm to reduce the difficulty of processing.

[0061] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Clamping connection cover, characterized in that, include: Cover plate body (100); A first plastic part (200) and a second plastic part (300), wherein the first plastic part (200) and the second plastic part (300) are respectively arranged on both sides of the cover plate body (100); a tab shaping structure (310) is arranged on a side of the second plastic part (300) away from the cover plate body (100); the tab can be folded into the tab shaping structure (310) and folded to a side of the first plastic part (200) away from the cover plate body (100) through the second plastic part (300) and the cover plate body (100); A clamping member (400), wherein the clamping member (400) is capable of penetrating and clamping the first plastic member (200) and the cover body (100), or the cover body (100) and the second plastic member (300), or the first plastic member (200), the cover body (100) and the second plastic member (300).

2. The clamping connection cover according to claim 1, characterized in that: The cover plate body (100) is provided with a cover plate tab opening (110), the first plastic part (200) is provided with a first plastic part tab opening (220), and the second plastic part (300) is provided with a second plastic part tab opening (330). The cover plate tab opening (110), the first plastic part tab opening (220), and the second plastic part tab opening (330) are correspondingly arranged. The tab can pass through the second plastic part tab opening (330), the cover plate tab opening (110), and the first plastic part tab opening (220) and be folded over the first plastic part (200).

3. The clamping connection cover according to claim 2, characterized in that: The cover plate body (100) is provided with a receiving groove (120), the first plastic part (200) is received in the receiving groove (120), and the cover plate tab opening (110) is provided at the bottom of the receiving groove (120).

4. The clamping connection type cover plate according to claim 1, characterized in that: The clamping member (400) includes a supporting portion (410) and clamping portions (420) disposed on opposite sides of the supporting portion (410); the supporting portion (410) is capable of supporting the first plastic part (200), and the clamping portion (420) is capable of sequentially passing through the first plastic part (200) and the cover plate body (100) and clamping the second plastic part (300); or, The abutting portion (410) can abut against the first plastic part (200), and the clamping portion (420) can pass through the first plastic part (200) and clamp the cover plate body (100); or, The abutting portion (410) can abut against the cover plate body (100), and the clamping portion (420) can be clamped on the second plastic part (300) through the cover plate body (100).

5. The clamping connection type cover plate according to claim 4, characterized in that: An end of the clamping portion (420) away from the abutting portion (410) forms a flange (421), and the flange (421) can be clamped on a side of the cover body (100) away from the first plastic part (200), or a side of the second plastic part (300) away from the cover body (100).

6. The clamping connection type cover plate according to claim 4, characterized in that: The first plastic part (200) is provided with an embedding groove (210), the abutting portion (410) is arranged in the embedding groove (210), and the upper end surface of the abutting portion (410) is not higher than the upper end surface of the first plastic part (200).

7. The clamping connection type cover plate according to any one of claims 1 to 6, characterized in that: The clamping member (400) is an epoxy resin member, a metal member and / or a plastic member.

8. A battery case, characterized in that It comprises a shell and a clamping connection type cover plate as described in any one of claims 1 to 7, wherein the clamping connection type cover plate is arranged at the opening of the shell to form a battery cell accommodating space.

9. A battery, characterized in that The battery cell comprises a battery shell as claimed in claim 8, wherein the battery cell is arranged in the battery shell, and the tab of the battery cell can be retracted to the tab shaping structure (310) and folded to the side of the first plastic part (200) away from the cover body (100) through the second plastic part (300) and the cover body (100).

10. A battery pack, characterized in that: Comprising a plurality of batteries as claimed in claim 9.

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