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 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. A clamping structure is arranged on the cover plate body and / or the first plastic part, a clamping hole is formed in the cover plate body and / or the first plastic part, and the clamping structure can be clamped in the clamping hole. The clamping connection type cover plate can normalize the shape of the tab, enlarge the internal space of the battery shell, simplify the battery assembly process and improve the battery assembly efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a snap-connection type 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 is not conducive to the utilization of the internal space of the battery housing, and the shape of the tabs after folding is poor, which can easily cause short circuit problems. In addition, in this arrangement, the first plastic part and the cover body need to be connected with rivets, which is complicated to assemble and is not conducive to improving battery assembly efficiency.

[0004] Therefore, there is an urgent need for a snap-connection cover, 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 snap-on connection type cover plate, which can regularize the shape of the tabs, expand the internal space of the battery shell, and simplify the battery assembly process, thereby improving the battery assembly efficiency.

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

[0007] Snap-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 structure is provided on the cover body and / or the first plastic part. The cover body and / or the first plastic part are provided with a clamping hole, and the clamping structure can be clamped in the clamping hole.

[0011] As a preferred solution of the snap-connected cover provided by the present invention, the snap-connecting structure includes a connecting portion and a snap-connecting portion, the snap-connecting portion is connected to the connecting portion and extends away from the connecting portion at an angle, and the connecting portion is connected to the cover body and / or the first plastic part;

[0012] A step portion is provided in the clamping hole, the connecting portion is passed through the clamping hole, and the clamping portion is clamped to the step portion.

[0013] As a preferred solution of the snap-connected cover provided by the present invention, there are two snap-connecting structures, the connecting parts of the two snap-connecting structures are arranged parallel to each other and spaced apart, and the snap-connecting parts of the two snap-connecting structures are arranged back to back or facing each other.

[0014] As a preferred solution of the snap-connected cover provided by the present invention, a guide slope is provided on the side of the snap-connecting portion away from the connecting portion, and the guide slope can move along the hole wall of the snap-connecting hole to allow the snap-connecting portion to pass through the snap-connecting hole.

[0015] As a preferred solution of the snap-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.

[0016] As a preferred solution of the snap-connected cover provided by the present invention, there are multiple cover tab openings, multiple first plastic part tab openings, and multiple second plastic part tab openings.

[0017] As a preferred solution of the snap-connected 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.

[0018] According to another aspect of the present invention, the object is to provide a battery shell, which includes a shell and a snap-on cover as described in any one of the above schemes, and the snap-on cover is arranged at the opening of the shell to form a battery cell accommodating space.

[0019] 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.

[0020] 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.

[0021] Beneficial effects of the utility model:

[0022] The snap-on connection cover provided by the present invention includes a cover body, a first plastic part, a second plastic part, a snap-on structure, and a snap-on hole. 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, avoiding 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 snap-on structure is provided on the cover body and / or the first plastic part, and the snap-on hole is provided on the cover body and / or the first plastic part, and the snap-on structure can be snapped into the snap-on hole. That is to say, the cover body and the first plastic part can be assembled by quick connection through the cooperation of the snap-fit ​​structure and the snap-fit ​​hole, thereby simplifying the installation process of the cover body and the first plastic part, thereby simplifying the battery assembly process and improving battery assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a top view of a snap-connection cover provided by an embodiment of the present utility model;

[0024] Figure 2 yes Figure 1 Cross-sectional view along the AA axis;

[0025] Figure 3 This is a schematic diagram of the decomposition of the snap-connected cover provided by the embodiment of the present invention. Figure 1 ;

[0026] Figure 4 This is a schematic diagram of the decomposition of the snap-connected cover provided by the embodiment of the present invention. Figure 2 ;

[0027] Figure 5 yes Figure 4 A partial enlarged view of the structure marked as B;

[0028] Figure 6 yes Figure 4 A partial enlarged view of the structure marked as C;

[0029] Figure 7 It is a schematic diagram of a clamping structure and a clamping hole provided in another embodiment of the present invention.

[0030] In the picture:

[0031] 100, cover plate body; 110, cover plate tab opening; 120, receiving groove; 130, liquid injection hole; 140, explosion-proof valve;

[0032] 200, first plastic part; 220, tab opening of first plastic part;

[0033] 300, second plastic part; 310, tab shaping structure; 330, tab opening of second plastic part;

[0034] 400 , snap-fit ​​structure; 410 , connecting portion; 420 , snap-fit ​​portion; 421 , guide slope.

[0035] 500, snap-on hole; 510, step portion. 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 snap-on cover, a battery case, a battery, and a battery pack. The battery case includes a housing and the snap-on cover provided in this embodiment. The snap-on cover is positioned at an opening in the housing, and the two together form a cell-accommodating space. The battery includes a cell and the battery case described above, with the cell being positioned within the cell-accommodating space within the battery case. The battery pack provided in this embodiment includes several batteries provided in this embodiment.

[0041] Figure 1 A top view of a snap-connected cover plate provided in an embodiment of the present invention is shown; Figure 2 Show Figure 1 Cross-sectional view along the AA axis; Figure 3 Shows the exploded view of the snap-connected cover provided by the embodiment of the present invention Figure 1 ; Figure 4 Shows the exploded view of the snap-connected cover provided by the embodiment of the present invention Figure 2 . Reference Figures 1-4 The snap-connected cover provided in this embodiment includes a cover body 100 , a first plastic part 200 , a second plastic part 300 , a snap-connecting structure 400 and a snap-connecting hole 500 .

[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] More specifically, the tab shaping structure 310 may be one or more, with the number being selected based on the tab arrangement and actual battery requirements. In this embodiment, the tab shaping structures 310 are multiple, with the multiple tab shaping structures 310 spaced apart in two groups along the length of the second plastic part 300. The multiple tab shaping structures 310 in a group are arranged side by side along the width of the second plastic part 300.

[0044] 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.

[0045] 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.

[0046] Continue to refer to Figure 1 and Figure 3 The cover body 100 has a receiving groove 120 on the side facing away from the second plastic part 300. The first plastic part 200 can be received in the receiving groove 120. The cover tab opening 110 is located at the bottom of the receiving groove 120. The distance between the upper end surface of the first plastic part 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.

[0047] 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.

[0048] 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 cell accommodation space, or on the side of the cover body 100 facing away from the cell accommodation space.

[0049] More specifically, the first plastic part 200 is provided with a flange along its circumference, which increases 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, the weight of the first plastic part 200, the material usage, and the manufacturing cost will increase.

[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] Continue to refer to Figure 3 and Figure 4 The cover body 100 and / or the first plastic part 200 are provided with the snap-fit ​​structure 400, and the cover body 100 and / or the first plastic part 200 are provided with a snap-fit ​​hole 500, into which the snap-fit ​​structure 400 can be snapped. In other words, through the cooperation between the snap-fit ​​structure 400 and the snap-fit ​​hole 500, the first plastic part 200 and the cover body 100 can be assembled using a quick-connect method, thereby simplifying the battery assembly process and improving battery assembly efficiency. A snap-fitting structure 400 can be provided on the cover body 100, and a snap-fitting hole 500 can be opened on the first plastic part 200; or, a snap-fitting structure 400 can be provided on the first plastic part 200, and a snap-fitting hole 500 can be opened on the cover body 100; or, snap-fitting structures 400 can be provided on the cover body 100 and the first plastic part 200, respectively, and snap-fitting holes 500 can be opened on the cover body 100 and the first plastic part 200, respectively, so that the snap-fitting structure 400 on the cover body 100 corresponds to and is snap-fitted into the snap-fitting hole 500 on the first plastic part 200, and the snap-fitting structure 400 on the first plastic part 200 corresponds to and is snap-fitted into the snap-fitting hole 500 on the cover body 100.

[0052] It should be noted that the number of the clamping structure 400 and the clamping hole 500 can be single or multiple, and this embodiment does not impose any limitation thereto.

[0053] Figure 5 Show Figure 4 A partial enlarged view of the structure marked as B; Figure 6 Show Figure 4 A partial enlarged view of the structure marked with C. Figure 4-Figure 6In this embodiment, the description is made by taking the case where two clamping structures 400 are provided on the first plastic component 200 and the clamping holes 500 are opened on the cover body 100 .

[0054] Specifically, the snap-fit ​​structure 400 includes a connecting portion 410 and a snap-fit ​​portion 420. The snap-fit ​​portion 420 is connected to the connecting portion 410 and extends at an angle away from the connecting portion 410. In this embodiment, the connecting portion 410 and the snap-fit ​​portion 420 are arranged perpendicularly. The connecting portion 410 is connected to the side of the first plastic component 200 facing the cover body 100. A step portion 510 is provided in the snap-fit ​​hole 500. The snap-fit ​​portion 420 can enter the snap-fit ​​hole 500 from the side of the cover body 100 facing the first plastic component 200, so that the connecting portion 410 is inserted into the snap-fit ​​hole 500 and the snap-fit ​​portion 420 is snap-fitted to the step portion 510.

[0055] Specifically, in this embodiment, there are two clamping structures 400, the connecting portions 410 of the two clamping structures 400 are arranged parallel to each other and spaced apart, and the clamping portions 420 of the two clamping structures 400 are arranged back to back, as shown in FIG. Figure 6 As shown. Correspondingly, two steps 510 are provided within the engaging hole 500. The two steps 510 are spaced apart along the length of the engaging hole 500, corresponding to the two engaging portions 420. The engaging portions 420 of the two engaging structures 400 can pass through the engaging hole 500 through the gap between the two steps 510 and then engage with the two steps 510 on the sides facing away from the first plastic part 200.

[0056] To be more specific, the end face of the step portion 510 facing away from the first plastic part 200 is lower than the end face of the cover body 100 facing away from the first plastic part 200, so that after the clamping portion 420 and the step portion 510 are clamped into place, the clamping portion 420 can be no higher than the end face of the cover body 100 facing away from the first plastic part 200, thereby preventing interference with the installation of the second plastic part 300 and the cover body 100.

[0057] More specifically, a guide slope 421 is provided on a side of the engaging portion 420 away from the connecting portion 410. The guide slope 421 can move along the wall of the engaging hole 500 to allow the engaging portion 420 to pass through the engaging hole 500. In other words, the guide slope 421 can provide guidance for the engaging portion 420 during its insertion into the engaging hole 500, facilitating smooth passage of the engaging portion 420.

[0058] More specifically, the connecting portion 410 can be made of an elastic material so that it can tilt within an elastic range when the clamping portion 420 passes through the clamping hole 500, and can return to its original shape after the clamping portion 420 and the step portion 510 are clamped into place.

[0059] Figure 7 A schematic diagram showing a clamping structure and a clamping hole provided by another embodiment of the present invention is shown. Figure 7 In another embodiment, the two engaging portions 420 of the engaging structures 400 are disposed facing each other. A step portion 510 is disposed within the engaging hole 500. The step portion 510 is disposed at the center of the engaging hole 500 in the longitudinal direction. The two engaging portions 420 can respectively pass through the gaps between the two sides of the step portion 510 and the inner wall of the engaging hole 500 in the longitudinal direction, and are engaged with the side of the step portion 510 facing away from the first plastic part 200.

[0060] 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. The snap-on cover is characterized by: 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 snap-fit ​​structure (400) is provided on the cover body (100) and / or the first plastic part (200), and a snap-fit ​​hole (500) is provided on the cover body (100) and / or the first plastic part (200), and the snap-fit ​​structure (400) can be snap-fitted into the snap-fit ​​hole (500).

2. The snap-connection cover according to claim 1, wherein: The clamping structure (400) comprises a connecting portion (410) and a clamping portion (420), wherein the clamping portion (420) is connected to the connecting portion (410) and extends away from the connecting portion (410) at an angle, and the connecting portion (410) is connected to the cover body (100) and / or the first plastic part (200); A step portion (510) is provided in the clamping hole (500), the connecting portion (410) is passed through the clamping hole (500), and the clamping portion (420) is clamped to the step portion (510).

3. The snap-connection cover according to claim 2, wherein: There are two clamping structures (400), the connecting parts (410) of the two clamping structures (400) are arranged parallel to each other and spaced apart, and the clamping parts (420) of the two clamping structures (400) are arranged back to back or facing each other.

4. The snap-connection cover according to claim 2, wherein: A guide slope (421) is provided on one side of the clamping portion (420) away from the connecting portion (410), and the guide slope (421) can move along the hole wall of the clamping hole (500) to allow the clamping portion (420) to pass through the clamping hole (500).

5. The snap-connection cover according to claim 1, wherein: 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).

6. The snap-connection cover according to claim 5, characterized in that: The cover plate tab opening (110), the first plastic part tab opening (220), and the second plastic part tab opening (330) are all multiple.

7. The snap-connection cover according to claim 5, 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).

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