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

Abstract

The utility model belongs to the technical field of batteries, and discloses a bonding connection type cover plate, a battery shell, a battery and a battery pack. The bonding connection type cover plate comprises a cover plate body, a first plastic part, a second plastic part and an adhesive layer. 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 adhesive layer is arranged between the first plastic part and the cover plate body; and / or the adhesive layer is arranged between the cover plate body and the second plastic part. The bonding connection type cover plate can normalize the shape of the tab, enlarge the internal space of the battery shell and effectively reduce the size of the battery.

Description

Technical Field

[0001] The utility model relates to the technical field, and in particular to an adhesively connected cover plate, a battery shell, a battery and a battery pack. Background Art

[0002] The first plastic part of a traditional battery cover is arranged on the outside of the cover body, the second plastic part is thicker and is arranged on the side of the cover body away from the first plastic part, and the pole and the tab are both 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 shape, which can easily cause short circuits. Furthermore, in this arrangement, the first plastic component and the cover body must be connected using rivets, which increases the vertical size of the battery and hinders its volume reduction.

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

[0005] The purpose of the utility model is to provide an adhesively connected cover plate, which can regularize the shape of the tabs, expand the internal space of the battery shell, and effectively reduce the size of the battery.

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

[0007] Adhesive-connected cover plate, 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] An adhesive layer is provided between the first plastic part and the cover body; and / or, the adhesive layer is provided between the cover body and the second plastic part.

[0011] As a preferred solution of the adhesively connected 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 adhesive connection type cover provided by the present invention, the cover plate tab openings, the first plastic part tab openings and the second plastic part tab openings are all multiple.

[0013] As a preferred solution of the adhesive 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.

[0014] As a preferred solution of the adhesive connection type cover provided by the present invention, there are multiple tab shaping structures, and the multiple tab shaping structures are arranged side by side along the width direction of the second plastic part.

[0015] As a preferred solution of the adhesive connection type cover provided by the present invention, the adhesive layer is a polyolefin resin layer or a polyisobutylene rubber layer.

[0016] As a preferred solution of the adhesive-connected cover plate provided by the present invention, the adhesive strength of the adhesive layer is ≥0.5 MPa.

[0017] According to another aspect of the present invention, the object is to provide a battery shell, which includes a shell and an adhesively connected cover plate as described in any one of the above schemes, and the adhesively connected cover plate is arranged at the opening of the shell to form a battery cell accommodating space.

[0018] 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.

[0019] 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.

[0020] Beneficial effects of the utility model:

[0021] The adhesively connected cover provided by the present invention includes a cover body, a first plastic part, a second plastic part, and an adhesive layer. The first and second plastic parts are respectively arranged on either side of the cover body. 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 within 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 tab shape, avoiding short circuits caused by poor tab shape after folding. Furthermore, a portion of the tab can be arranged outside the battery case, thereby expanding the internal space of the battery case. The adhesive layer is provided between the first plastic part and the cover body; and / or between the cover body and the second plastic part. In other words, the adhesive layer can achieve reliable connection between adjacent first, cover, and second plastic parts, simplifying the structure of the battery case and reducing the battery volume in the vertical direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the adhesive connection cover provided by the embodiment of the utility model. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of the adhesive connection cover provided by the embodiment of the utility model. Figure 2 ;

[0024] Figure 3 This is a top view of the adhesively connected cover provided by an embodiment of the present utility model;

[0025] Figure 4 yes Figure 3 Cross-sectional view along the AA axis;

[0026] Figure 5 It is an exploded schematic diagram of the adhesive-connected cover provided in an embodiment of the present utility model.

[0027] In the picture:

[0028] 100, cover plate body; 110, cover plate tab opening; 120, receiving groove; 130, liquid injection hole; 140, explosion-proof valve;

[0029] 200, first plastic part; 220, tab opening of first plastic part;

[0030] 300, second plastic part; 310, tab shaping structure; 330, tab opening of second plastic part. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] This embodiment provides an adhesively connected cover plate, a battery case, a battery, and a battery pack. The battery case includes a housing and the adhesively connected cover plate provided in this embodiment. The adhesively connected cover plate is disposed 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, and the cell is disposed in the cell storage space within the battery case. The battery pack provided in this embodiment includes several batteries provided in this embodiment.

[0036] Figure 1 The structure of the adhesive connection cover provided by the embodiment of the utility model is shown Figure 1 ; Figure 2The structure of the adhesive connection cover provided by the embodiment of the utility model is shown Figure 2 ; Figure 3 A top view of an adhesively connected cover plate provided by an embodiment of the present utility model is shown; Figure 4 Show Figure 3 Cross-sectional view along the AA axis; Figure 5 The following is a schematic diagram of an exploded view of the adhesive connection type cover provided by the embodiment of the present invention. Figure 1-Figure 5 The adhesive-connected cover provided in this embodiment includes a cover body 100, a first plastic part 200, a second plastic part 300 and an adhesive layer.

[0037] 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.

[0038] More specifically, the adhesive layer is provided between the first plastic part 200 and the cover body 100, and / or between the cover body 100 and the second plastic part 300. In other words, the adhesive layer enables reliable connection between adjacent parts of the first plastic part 200, the cover body 100, and the second plastic part 300, simplifying the structure of the battery housing and reducing the battery's volume in the vertical direction.

[0039] More specifically, there may be one or more tab shaping structures 310, the number of which is selected based on the tab arrangement and the actual requirements of the battery. In this embodiment, there are multiple tab shaping structures 310, which are arranged in two groups along the length of the second plastic part 300 at intervals. The multiple tab shaping structures 310 in the same group are arranged side by side along the width of the second plastic part 300.

[0040] More specifically, the 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 to the top of the first plastic part 200, and connect to the positive or negative electrode of the battery.

[0041] Optionally, there are multiple cover plate tab openings 110, multiple first plastic part tab openings 220, and multiple second plastic part tab openings 330. 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 a positive electrode is provided on one side of the cover plate body 100 in its longitudinal direction and a negative electrode is provided on the other side, the number N of cover plate tab openings 110 on the positive and negative sides is ≥ 1. In other words, the tab corresponding to the positive or negative electrode can extend outside the battery case through a corresponding set of second plastic part tab openings 330, cover plate tab openings 110, and first plastic part tab openings 220, or can extend outside the battery case through multiple sets of corresponding second plastic part tab openings 330, cover plate 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. Correspondingly, the first plastic part 200 is provided with two first plastic part tab openings 220 corresponding one to the cover tab openings 110. The cover tab openings 110 are provided along the length of the cover body 100, and the two cover tab openings 110 are spaced apart from each other along the width of the cover body 100.

[0042] More specifically, a receiving groove 120 is defined on the side of the cover body 100 facing away from the second plastic component 300. The first plastic component 200 can be 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 will not be conducive to improving space utilization. If this distance is too large, it will reduce the structural strength of the cover body 100.

[0043] 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.

[0044] More specifically, in this embodiment, the cover body 100 may further 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.

[0045] Reference Figure 1 and Figure 3The 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.

[0046] 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.

[0047] Alternatively, the adhesive layer may be a polyolefin resin layer or a polyisobutylene rubber layer, which has the property of being resistant to corrosion by electrolyte.

[0048] Optionally, the adhesive layer has an adhesive strength of ≥0.5 MPa to ensure adhesive reliability between the first plastic part 200 and the cover body 100 , and between the cover body 100 and the second plastic part 300 .

[0049] 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. Adhesive connection type cover plate, 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); An adhesive layer is provided between the first plastic part (200) and the cover plate body (100); and / or, the adhesive layer is provided between the cover plate body (100) and the second plastic part (300).

2. The adhesively connected cover plate 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 adhesive-connected cover plate according to claim 2, wherein: The cover plate tab opening (110), the first plastic part tab opening (220), and the second plastic part tab opening (330) are all multiple.

4. The adhesively connected cover plate according to claim 2, wherein: 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).

5. The adhesive-connected cover plate according to claim 1, wherein: There are a plurality of tab shaping structures (310), and the plurality of tab shaping structures (310) are arranged side by side along the width direction of the second plastic part (300).

6. The adhesively connected cover plate according to any one of claims 1 to 5, characterized in that: The adhesive layer is a polyolefin resin layer or a polyisobutylene rubber layer.

7. The adhesively connected cover plate according to any one of claims 1 to 5, characterized in that: The bonding strength of the adhesive layer is ≥0.5 MPa.

8. A battery case, characterized in that It comprises a shell and an adhesive-connected cover plate as described in any one of claims 1 to 7, wherein the adhesive-connected 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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