Insulating patch and battery cell

Abstract

The utility model provides an insulating patch and a battery cell. The insulating patch comprises a patch body and an anti-sticking stripping layer, wherein one side surface of the patch body is provided with an adhesive layer; the anti-sticking stripping layer is adhered and covered on the adhesive layer; the anti-sticking stripping layer is provided with a main body part arranged corresponding to the patch body and end parts which protrude out of the two ends of the main body part and extend out of the end parts of the patch body. According to the insulating patch provided by the utility model, the main body part of the anti-sticking stripping layer is adhered to the patch body, the transfer of the insulating patch is facilitated, and the end parts are respectively arranged at the two ends of the main body part, so that when the anti-sticking stripping layer is torn off, one end part can be grabbed by one grabbing part in the grabbing mechanism to move and tear off; one grabbing part is used for grabbing one end part for fixation, the other grabbing part is used for grabbing the other end part for fixation, so that the anti-sticking stripping layer is gradually separated from the patch body from one end to the other end, and then the fixation of the end part is relieved, thereby being beneficial to improving the tearing effect of the anti-sticking stripping layer and further being beneficial to improving the bonding efficiency of the insulating patch.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to an insulating patch; meanwhile, the utility model also relates to a battery core provided with the insulating patch. Background Art

[0002] Currently, lithium batteries are used more and more widely, and the insulation performance requirements on the outer surface of the battery cover are also very strict. At present, the industry usually uses insulating patches to stick on the surface of the cover. However, since the back of the insulating sheet requires composite tape and cannot be stored and transported alone, release paper is required on the adhesive side for turnover storage before production.

[0003] The release paper currently used in the industry is usually slightly larger than the size of the insulation patch, but the patch and release paper are difficult to peel off during the actual patch assembly manufacturing process, resulting in poor process manufacturing performance and not conducive to improving production efficiency. Specifically, when peeling off the release paper, the insulation patch is first adsorbed and fixed by the adsorption part, and then the release paper is torn off with the help of tools. However, during the process of tearing off the release paper, there is a risk of tearing the insulation patch off from the adsorption part, resulting in poor peeling effect of the release paper, which in turn affects the bonding efficiency of the insulation patch on the cover. Utility Model Content

[0004] In view of this, the utility model aims to provide an insulating patch to facilitate the peeling of the anti-sticking peeling layer and improve the production efficiency of the battery cell.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] An insulating patch comprises a patch body having an adhesive layer on one side thereof, and an anti-sticking peeling layer adhered and covered on the adhesive layer; the anti-sticking peeling layer comprises a main body portion arranged corresponding to the patch body, and end portions protruding from both ends of the main body portion and extending out from the end portions of the patch body.

[0007] Furthermore, the length a of at least one of the end portions satisfies: 5mm≤a≤50mm; and / or the width b of at least one of the end portions satisfies: 5mm≤b≤50mm.

[0008] Furthermore, at least one of the end portions is in the shape of a square, a rectangle, a trapezoid, a triangle or a fan.

[0009] Furthermore, the area of ​​the main body portion is larger than the area of ​​the patch body, so that the main body portion has an extension portion extending out of the edges around the patch body.

[0010] Furthermore, a width c of the extension portion located on each side of the main portion satisfies: 0.5 mm ≤ c ≤ 3 mm.

[0011] Furthermore, a width d of the extension portion at each end of the main portion satisfies: 0.5 mm ≤ d ≤ 3 mm.

[0012] Furthermore, the patch body is provided with a first exposure hole and / or a second exposure hole; the first exposure hole is used for exposing the output pole block on the cover plate, and the second exposure hole is used for exposing the explosion-proof valve on the cover plate.

[0013] Furthermore, the patch body is provided with a third exposure hole and / or a fourth exposure hole; the third exposure hole is used for setting the injection hole on the cover plate, and the fourth exposure hole is used for setting the identification structure on the cover plate.

[0014] Furthermore, the anti-sticking peeling layer is made of release paper.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] The insulating patch described in the utility model is bonded to the patch body by the main part of the anti-sticking peeling layer, which is beneficial to the transfer of the insulating patch, and by arranging end parts at both ends of the main part, when tearing off the anti-sticking peeling layer, one end part can be grabbed by one of the grabbing parts in the grabbing mechanism for moving and tearing, and the other end part can be grabbed by the other grabbing part for fixing, so that the anti-sticking peeling layer is gradually separated from the patch body from one end to the other end, and then the fixation of the end part is released, thereby facilitating the tearing effect of the anti-sticking peeling layer, preventing the patch body from falling off from the adsorption part as the anti-sticking peeling layer is separated, and further facilitating the improvement of the bonding efficiency of the insulating patch.

[0017] In addition, the setting of the length and width range of the end part is conducive to improving the gripping effect of the gripping part on the end part, so as to facilitate the tearing of the anti-sticking peeling layer from the patch body. The square, rectangular, trapezoidal, triangular or fan-shaped structure is simple and easy to process and shape. The main body part has an extension part set to delete the edges around the patch body, which is conducive to improving the covering effect of the adhesive layer on the patch body and preventing the adhesive layer from being contaminated. The setting of the width range of the extension part on each side is conducive to improving the covering effect of the main body on the adhesive layers on both sides of the patch body. The setting of the width range of the extension part at each end is conducive to improving the covering effect of the main body on the adhesive layers at both ends of the patch body.

[0018] In addition, the first exposure hole facilitates the exposure of the output pole block, and the second exposure hole facilitates the exposure of the explosion-proof valve, so as to facilitate the adaptation of different cover plates and meet the use requirements. The third exposure hole facilitates the exposure of the injection hole, and the fourth exposure hole facilitates the exposure of the identification structure, which facilitates the adaptation of different cover plates and meets the use requirements. The anti-sticking peeling layer adopts release paper, which has the advantages of easy implementation, good bonding effect on the adhesive layer, and easy tearing.

[0019] In addition, another object of the present invention is to provide a battery cell, comprising the insulating patch as described above, wherein the patch body with the anti-sticking peeling layer torn off is adhered to the cover plate of the battery cell.

[0020] The battery cell of the utility model is provided with the above insulating patch, which is beneficial to improving the safety of the battery cell and also beneficial to improving the production efficiency of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the insulating patch according to an embodiment of the utility model;

[0023] Figure 2 It is a schematic structural diagram of the anti-sticking release layer described in an embodiment of the utility model.

[0024] Description of reference numerals:

[0025] 1. Patch body; 2. Anti-stick peeling layer;

[0026] 101, second external exposure hole; 102, first external exposure hole; 103, fourth external exposure hole; 104, third external exposure hole;

[0027] 200. Main body portion; 201. End portion; 202. Extension portion. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0029] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0031] The present embodiment relates to an insulating patch to solve the problem in the prior art that the anti-sticking peeling layer 2 on the insulating patch is difficult to tear off.

[0032] In terms of overall composition, Figure 1 As shown in the figure, the insulating patch includes a patch body 1 having an adhesive layer on one side thereof, and an anti-adhesive peeling layer 2 bonded and covered on the adhesive layer. The anti-adhesive peeling layer 2 has a main body portion 200 arranged corresponding to the patch body 1, and end portions 201 protruding from both ends of the main body portion 200 and extending out of the end portions of the patch body 1.

[0033] The insulating patch described in this embodiment is bonded to the patch body 1 through the main part 200 of the anti-sticking peeling layer 2, which is beneficial to the transfer of the insulating patch, and by providing end parts 201 at both ends of the main part 200, when tearing off the anti-sticking peeling layer 2, one of the gripping parts in the gripping mechanism can grab one end part 201 for moving and tearing, and the other gripping part can grab the other end part 201 for fixing, so that the anti-sticking peeling layer 2 is gradually separated from the patch body 1 from one end to the other end, and then the fixation of the end part 201 is released, thereby facilitating the tearing effect of the anti-sticking peeling layer 2, preventing the patch body 1 from falling off from the adsorption part as the anti-sticking peeling layer 2 is separated, and further facilitating the improvement of the bonding efficiency of the insulating patch.

[0034] Specifically, the patch body 1 can be substantially the same as the patch body 1 in the prior art, both of which are rectangular, and have the advantages of simple structure and easy processing. After the anti-sticking peeling layer 2 is torn off, the patch body 1 can be bonded to the outer side of the battery cover through the adhesive layer, thereby achieving a better insulation effect and further improving the safety of the battery.

[0035] As a preferred embodiment, the area of ​​the main body 200 is larger than the area of ​​the patch body 1, so that the main body 200 has an extension part 202 extending from the edges of the patch body 1. The extension part 202 is provided to improve the coverage effect of the adhesive layer on the patch body 1, prevent the adhesive layer of the insulating patch from being contaminated during the transfer process, and further improve the bonding effect of the insulating patch.

[0036] like Figure 1 As shown in , the width c of the extension part 202 located on each side of the main part 200 satisfies: 0.5mm≤c≤3mm. The setting of the width c range here is conducive to improving the coverage effect of the main part 200 on the adhesive layers on both sides of the patch body 1, and on the premise of meeting the use requirements, it is conducive to reducing the amount of the anti-sticking peeling layer 2. In addition, the width d of the extension part 202 located at each end of the main part 200 satisfies: 0.5mm≤d≤3mm. The setting of the width d range here is conducive to improving the coverage effect of the main part 200 on the adhesive layers at both ends of the patch body 1, and on the premise of meeting the use requirements, it is conducive to reducing the amount of the anti-sticking peeling layer 2.

[0037] In specific implementation, for example, the width c of the extension part 202 located at each side of the main part 200 can be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm, etc. The width d of the extension part 202 located at each end of the main part 200 can be, for example, 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm, etc. As a preferred embodiment, the widths of the extension parts 202 located at the side and end parts are equal, which is conducive to improving the stability of the anti-adhesive peeling layer 2 on the adhesive layer and the convenience of arrangement.

[0038] As a preferred embodiment, the length a of each end portion 201 satisfies: 5mm≤a≤50mm, and the width b of each end portion 201 satisfies: 5mm≤b≤50mm. The setting of the length and width range of the end portion 201 here is conducive to improving the gripping effect of the gripping portion on the end portion 201, thereby facilitating the peeling layer 2 to be torn off from the patch body 1.

[0039] In a specific implementation, the length a of the end portion 201 may be, for example, 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, or 50 mm, etc. The width b of each end portion 201 may be, for example, 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, or 50 mm, etc. Of course, in a specific implementation, the values ​​of the length a of the end portion 201 and the width b of the end portion 201 may be equal or unequal.

[0040] As a preferred example, Figure 1 and Figure 2 As shown in the figure, the two end portions 201 are of the same size and shape, and the end portions 201 are symmetrically arranged, which is conducive to improving the convenience of arranging the anti-adhesive peeling layer 2 on the patch body 1. Of course, the solution that the two end portions 201 are of different sizes and shapes is also feasible, as long as the grasping part is conducive to the grasping and clamping of the clamping claw. It should be noted that the solution that only the length a and width b of one end portion 201 are between 5mm-50mm is also feasible.

[0041] In specific implementation, the end portion 201 is not only Figure 1 In addition to the square shown in the figure, it can also be any one of a rectangle, a trapezoid, a triangle or a fan. These geometric shapes have simple structures and are easy to process and shape. Of course, as mentioned above, it is also feasible that the shapes of the two end portions 201 are different.

[0042] In order to further improve the use effect of the insulation patch, such as Figure 1 As shown in , a first exposure hole 102 and a second exposure hole 101 are provided on the patch body 1, wherein the first exposure hole 102 is used for the output pole block on the cover plate to be exposed, and the second exposure hole 101 is used for the explosion-proof valve on the cover plate to be exposed. This is conducive to adapting to different cover plates and meeting usage requirements. In specific implementation, the positions and specifications of the first exposure hole 102 and the second exposure hole 101 can be set corresponding to the output pole block and the explosion-proof valve on the cover plate. Of course, the first exposure hole 102 or the second exposure hole 101 can also be set selectively depending on whether the output pole block and the explosion-proof valve are arranged on the cover plate.

[0043] In addition, the patch body 1 is provided with a third exposure hole 104 and a fourth exposure hole 103. The third exposure hole 104 is used for setting the injection hole on the cover plate, and the fourth exposure hole 103 is used for exposing the identification structure on the cover plate. This is also conducive to the patch body 1 to adapt to different cover plates to meet the use requirements. In specific implementation, the positions and specifications of the third exposure hole 104 and the fourth exposure hole 103 can be set corresponding to the injection hole and the identification structure on the cover plate. Of course, the third exposure hole 104 or the fourth exposure hole 103 can also be selectively set according to whether the injection hole and the identification structure are arranged on the cover plate. It should be noted that the identification structure here can specifically be a "+" or "-" symbol used to identify the polarity of the output pole block.

[0044] The anti-adhesive peeling layer 2 in this embodiment is made of release paper. It has the advantages of being easy to implement, having a good bonding effect on the adhesive layer, and being easy to tear off. Of course, in addition to the release paper, the anti-adhesive peeling layer 2 can also be made of other products with covering effects that are easy to adhere to the adhesive layer and easy to tear off from the adhesive layer.

[0045] When the insulating patch in this embodiment is peeling off the anti-adhesive peeling layer 2, the patch body 1 is firstly adsorbed and fixed by the adsorption disk, and then the two gripping parts in the peeling mechanism clamp each end part 201 respectively, one gripping part peels off the anti-adhesive peeling layer 2 outward, and the other gripping part fixes the clamped end part 201. For the convenience of description, the gripping part that fixes the end part 201 is called the first gripping part, and the other gripping part is called the second gripping part, and the end part 201 clamped and fixed by the first gripping part is called the first end part 201, and the end part 201 clamped by the second gripping part is called the second end part 201.

[0046] The first gripping part clamps the first end part 201 to keep it fixed, and the second gripping part clamps the second end part 201 and tears the anti-adhesive peeling layer 2 outward, so that the anti-adhesive peeling layer 2 is gradually separated from the adhesive layer along the direction from the second end part 201 to the first end part 201, until the anti-adhesive peeling layer 2 close to the first end part 201 is separated from the adhesive layer, the first gripping part releases the clamping of the first end part 201, and under the action of the second gripping part, the entire anti-adhesive peeling layer 2 is torn off. In the process of tearing off the anti-adhesive peeling layer 2, the clamping of the first end part 201 by the first gripping part is conducive to preventing the patch body 1 from being separated from the adsorption part, thereby facilitating the tearing effect and efficiency of the anti-adhesive peeling layer 2.

[0047] The insulating patch in this embodiment has a simple structure, is easy to process and shape, and has a high tearing efficiency of the anti-sticking peeling layer 2, thereby facilitating improving the bonding efficiency of the patch body 1 on the cover plate.

[0048] In addition, the present embodiment also relates to a battery cell, comprising the insulating patch as described above, wherein the patch body 1 with the anti-sticking peeling layer 2 torn off is adhered to the cover plate of the battery cell.

[0049] The battery cell described in this embodiment is beneficial to improving the safety of the battery cell by providing the above insulating patch, and at the same time, it is also beneficial to improving the production efficiency of the battery cell.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An insulating patch, characterized in that: It comprises a patch body having an adhesive layer on one side thereof, and an anti-sticking peeling layer adhered and covered on the adhesive layer; The anti-adhesive peeling layer comprises a main body portion arranged corresponding to the patch body, and end portions protruding from both ends of the main body portion and extending out from the end portions of the patch body.

2. The insulating patch according to claim 1, characterized in that: The length a of at least one of the end portions satisfies: 5 mm ≤ a ≤ 50 mm; and / or, A width b of at least one of the end portions satisfies: 5 mm ≤ b ≤ 50 mm.

3. The insulating patch according to claim 1, characterized in that: At least one of the end portions is in the shape of a square, a rectangle, a trapezoid, a triangle or a sector.

4. The insulating patch according to claim 1, characterized in that: The area of ​​the main body portion is larger than the area of ​​the patch body, so that the main body portion has an extension portion extending out from the edges around the patch body.

5. The insulating patch according to claim 4, characterized in that: The width c of the extension portion located on each side of the main portion satisfies: 0.5 mm ≤ c ≤ 3 mm.

6. The insulating patch according to claim 4, characterized in that: The width d of the extension portion at each end of the main portion satisfies: 0.5 mm ≤ d ≤ 3 mm.

7. The insulating patch according to claim 1, characterized in that: The patch body is provided with a first exposure hole and / or a second exposure hole; The first exposure hole is used for exposing the output pole block on the cover plate, and the second exposure hole is used for exposing the explosion-proof valve on the cover plate.

8. The insulating patch according to claim 1, characterized in that: The patch body is provided with a third exposure hole and / or a fourth exposure hole; The third exposed hole is used for setting the injection hole on the cover plate, and the fourth exposed hole is used for setting the identification structure on the cover plate to be exposed.

9. The insulating patch according to any one of claims 1 to 8, characterized in that: The anti-sticking peeling layer is made of release paper.

10. A battery cell, characterized in that: The insulating patch comprises any one of claims 1 to 9, wherein the patch body after the anti-sticking peeling layer is torn off is adhered to the cover plate of the battery cell.

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