Insulating heat-conducting glue structure for lithium battery

Abstract

The utility model relates to the technical field of insulating heat-conducting glue, and discloses an insulating heat-conducting glue structure for a lithium battery. The lithium battery electrode end face insulation heat-conducting glue ring piece is attached to the release material face of the release film. The whole insulating heat-conducting glue patch structure is composed of an annular lithium battery electrode end face insulating heat-conducting glue ring piece and a disc-shaped lithium battery electrode welding point insulating heat-conducting glue piece, so that the whole insulating heat-conducting glue patch structure is attached to the electrode end of the battery; after welding is completed, the welding plate is attached to the protruding welding spots, the welding plate can adapt to staggered battery electrode ends formed by spot welding, the split type design is adopted, the effect that the welding plate can be attached to the battery electrode ends conveniently is achieved, the heat conduction and heat dissipation effect and the insulation effect of the battery electrode ends connected in series are guaranteed, and the service life of the battery electrode ends is prolonged. And the adaptability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of insulating and heat-conducting adhesives, in particular to an insulating and heat-conducting adhesive structure for lithium batteries. Background Art

[0002] Insulating and heat-conducting adhesives are a type of one-component room-temperature vulcanizing silicone adhesives, which have the characteristics of convenient use, high bonding strength, being an elastomer after curing, shock resistance, vibration resistance, etc. At the same time, the cured product also has good heat-conducting and heat-dissipating functions, excellent high and low temperature resistance performance and electrical performance. In the production of lithium batteries and lithium battery packs, it is often necessary to use insulating and heat-conducting adhesives for attachment to achieve heat conduction, heat dissipation and insulation of lithium batteries and battery packs.

[0003] Currently, the existing insulating and heat-conducting adhesive patch structures basically adopt an integrated sheet structure. When attaching to the electrode ends of lithium batteries, it is difficult to fit the series soldering points protruding from the battery electrode ends, so it is difficult to ensure the heat conduction and insulation effects of the battery electrode ends with spot welding in series, and the adaptability is poor. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides an insulating and heat-conducting adhesive structure for lithium batteries, which solves the problems raised in the above background art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An insulating and heat-conducting adhesive structure for lithium batteries, comprising:

[0007] Release film;

[0008] An insulating and heat-conducting adhesive ring sheet for the end face of a lithium battery electrode, which is attached to the release material surface of the release film;

[0009] An insulating and heat-conducting adhesive film for the welding point of a lithium battery electrode, which is attached to the inside of the insulating and heat-conducting adhesive ring sheet for the end face of the lithium battery electrode on the release film;

[0010] Connecting and attaching ring glue, which is attached to the junction of the insulating and heat-conducting adhesive ring sheet for the end face of the lithium battery electrode and the insulating and heat-conducting adhesive film for the welding point of the lithium battery electrode;

[0011] Taking and holding ring film, which is attached to the top surface of the connecting and attaching ring glue.

[0012] Preferably, the insulating and heat-conducting film for lithium battery electrode welding points is in a circular sheet structure, the insulating and heat-conducting rubber ring sheet for lithium battery electrode end face is in a circular sheet structure, the insulating and heat-conducting film for lithium battery electrode welding points is located inside the insulating and heat-conducting rubber ring sheet for lithium battery electrode end face, and the surface of the insulating and heat-conducting film for lithium battery electrode welding points coincides with the inner circle of the insulating and heat-conducting rubber ring sheet for lithium battery electrode end face.

[0013] Preferably, the area where the bottom surface of the connecting and attaching ring rubber adheres to the insulating and heat-conducting film for lithium battery electrode welding points is three times the area where it adheres to the insulating and heat-conducting rubber ring sheet for lithium battery electrode end face; the inner diameter of the holding ring film is equal to the inner diameter of the connecting and attaching ring rubber, and the outer diameter of the holding ring film is larger than the outer diameter of the connecting and attaching ring rubber.

[0014] Preferably, the insulating and heat-conducting rubber ring sheet for lithium battery electrode end face includes a PET antistatic film back material ring, a glass fiber base material ring, and a silicone adhesive coating ring. The PET antistatic film back material ring is bonded to the top surface of the glass fiber base material ring, and the silicone adhesive coating ring is coated on the bottom surface of the glass fiber base material ring.

[0015] Preferably, the insulating and heat-conducting film for lithium battery electrode welding points includes a PET antistatic film back material sheet, a glass fiber base material sheet, and a silicone adhesive coating sheet. The PET antistatic film back material sheet is bonded to the top surface of the glass fiber base material sheet, and the silicone adhesive coating sheet is coated on the bottom surface of the glass fiber base material sheet.

[0016] Preferably, the holding ring film includes an annular holding film and a holding groove, and the holding groove is opened on the outer edge of the annular holding film.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: For this insulating and heat-conducting rubber structure for lithium batteries, by setting that the entire insulating and heat-conducting rubber patch structure is composed of an annular insulating and heat-conducting rubber ring sheet for lithium battery electrode end face and a circular insulating and heat-conducting film for lithium battery electrode welding points, and making it integrally adhere to the electrode end of the battery. Tearing off the insulating and heat-conducting film for lithium battery electrode welding points can expose the series-connected spot welding positions for welding operations. After welding is completed, sticking it to the raised solder joints can adapt to the uneven battery electrode ends formed by spot welding. Adopting a split design achieves the effect of being easy to fit to the battery electrode end, ensuring the heat conduction and heat dissipation effect and insulating effect of the series-connected battery electrode ends, and improving the adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is a sectional and layered schematic diagram of the insulating and heat-conducting rubber ring sheet for lithium battery electrode welding points of the present utility model;

[0020] Figure 3Schematic diagram of dissection and layering of the insulating and heat-conducting film at the welding point of the lithium battery electrode of the present utility model;

[0021] Figure 4 Dissection and layering diagram of the holding ring film of the present utility model.

[0022] In the figure: 1 release film, 2 insulating and heat-conducting adhesive ring piece at the end face of the lithium battery electrode, 3 insulating and heat-conducting film at the welding point of the lithium battery electrode, 4 connecting and attaching ring adhesive, 5 holding ring film, 201 PET antistatic film back material ring, 202 glass fiber base material ring, 203 silicone adhesive coating ring, 301 PET antistatic film back material piece, 302 glass fiber base material piece, 303 silicone adhesive coating piece, 501 annular film holding piece, 502 holding groove. Specific implementation mode

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0024] Refer to Figures 1-4 , an insulating and heat-conducting adhesive structure for a lithium battery, comprising:

[0025] Release film 1;

[0026] Insulating and heat-conducting adhesive ring piece 2 at the end face of the lithium battery electrode, and the insulating and heat-conducting adhesive ring piece 2 at the end face of the lithium battery electrode is attached to the release material surface of the release film 1;

[0027] Insulating and heat-conducting film 3 at the welding point of the lithium battery electrode, and the insulating and heat-conducting film 3 at the welding point of the lithium battery electrode is attached to the inside of the insulating and heat-conducting adhesive ring piece 2 at the end face of the lithium battery electrode on the release film 1;

[0028] Connecting and attaching ring adhesive 4, and the connecting and attaching ring adhesive 4 is attached to the junction of the insulating and heat-conducting adhesive ring piece 2 at the end face of the lithium battery electrode and the insulating and heat-conducting film 3 at the welding point of the lithium battery electrode;

[0029] Holding ring film 5, and the holding ring film 5 is attached to the top surface of the connecting and attaching ring adhesive 4.

[0030] In the present utility model, the insulating and heat-conducting film 3 at the welding point of the lithium battery electrode is in a circular ring sheet structure, the insulating and heat-conducting adhesive ring piece 2 at the end face of the lithium battery electrode is in a circular sheet structure, the insulating and heat-conducting film 3 at the welding point of the lithium battery electrode is located inside the insulating and heat-conducting adhesive ring piece 2 at the end face of the lithium battery electrode, and the surface of the insulating and heat-conducting film 3 at the welding point of the lithium battery electrode coincides with the inner circle of the insulating and heat-conducting adhesive ring piece 2 at the end face of the lithium battery electrode;

[0031] More specifically, the insulating and heat-conducting film 3 for the lithium battery electrode welding point is set as an annular sheet structure, which is convenient for spot welding operation in its inner ring.

[0032] In the present utility model, the area where the bottom surface of the connecting and attaching ring glue 4 adheres to the insulating and heat-conducting film 3 for the lithium battery electrode welding point is three times the area where it adheres to the insulating and heat-conducting glue ring sheet 2 on the end face of the lithium battery electrode; the inner diameter of the holding ring film 5 is equal to the inner diameter of the connecting and attaching ring glue 4, and the outer diameter of the holding ring film 5 is larger than the outer diameter of the connecting and attaching ring glue 4.

[0033] More specifically, the area where the bottom surface of the connecting and attaching ring glue 4 adheres to the insulating and heat-conducting film 3 for the lithium battery electrode welding point is set to be three times the area where it adheres to the insulating and heat-conducting glue ring sheet 2 on the end face of the lithium battery electrode, which makes it convenient for operation when tearing and pulling, and avoids the separation of the connecting and attaching ring glue 4 and the insulating and heat-conducting film 3 for the lithium battery electrode welding point.

[0034] In the present utility model, the insulating and heat-conducting glue ring sheet 2 on the end face of the lithium battery electrode includes a PET antistatic film backing ring 201, a glass fiber base ring 202, and a silicone adhesive coating ring 203. The PET antistatic film backing ring 201 is bonded to the top surface of the glass fiber base ring 202, and the silicone adhesive coating ring 203 is coated on the bottom surface of the glass fiber base ring 202.

[0035] More specifically, the setting of the glass fiber base ring 202 makes the overall stability of the insulating and heat-conducting glue ring sheet 2 on the end face of the lithium battery electrode better, and it is not easy to deform due to temperature rise.

[0036] In the present utility model, the insulating and heat-conducting film 3 for the lithium battery electrode welding point includes a PET antistatic film backing sheet 301, a glass fiber base sheet 302, and a silicone adhesive coating sheet 303. The PET antistatic film backing sheet 301 is bonded to the top surface of the glass fiber base sheet 302, and the silicone adhesive coating sheet 303 is coated on the bottom surface of the glass fiber base sheet 302.

[0037] More specifically, the setting that the silicone adhesive coating sheet 303 is coated on the bottom surface of the glass fiber base sheet 302 ensures good heat dissipation and insulation effects.

[0038] In the present utility model, the holding ring film 5 includes an annular holding film 501 and a holding groove 502, and the holding groove 502 is opened on the outer edge of the annular holding film 501.

[0039] More specifically, by setting the holding groove 502 on the outer edge of the annular holding film 501, the holding and tearing operation is made more convenient and easy for hand operation.

[0040] Working principle: During use, attach the insulating heat-conducting rubber ring sheet 2 of the lithium battery electrode end face and the insulating heat-conducting rubber sheet 3 of the lithium battery electrode welding point to the electrode end of the battery that needs to be spot-welded. Then, pull and traction the holding ring diaphragm 5 to drive the connecting and attaching ring glue 4 to separate from the surface of the insulating heat-conducting rubber ring sheet 2 of the lithium battery electrode end face, and pull out the insulating heat-conducting rubber sheet 2 of the lithium battery electrode welding point. Then, spot welding operations can be carried out within the ring of the insulating heat-conducting rubber ring sheet 2 of the lithium battery electrode end face. After the spot welding operation is completed, attach the insulating heat-conducting rubber sheet 2 of the lithium battery electrode welding point to the raised solder joints, and it can be adapted for spot-welding attachment applications.

[0041] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0042] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An insulating thermally conductive adhesive structure for a lithium battery, characterized in that: include: Release film (1); An insulating thermally conductive adhesive ring sheet (2) for the end surface of a lithium battery electrode, wherein the insulating thermally conductive adhesive ring sheet (2) for the end surface of a lithium battery electrode is attached to a release material surface of a release film (1); An insulating thermally conductive adhesive sheet (3) at the welding point of the lithium battery electrode, wherein the insulating thermally conductive adhesive sheet (3) at the welding point of the lithium battery electrode is attached to the inside of the insulating thermally conductive adhesive ring sheet (2) at the end surface of the lithium battery electrode of the release film (1); A connecting adhesive ring (4), wherein the connecting adhesive ring (4) is attached to the junction of the insulating thermal conductive adhesive ring sheet (2) at the end surface of the lithium battery electrode and the insulating thermal conductive adhesive sheet (3) at the welding point of the lithium battery electrode; The ring holding film (5) is taken, and the ring holding film (5) is attached to the top surface of the connecting and attaching ring glue (4).

2. The insulating thermal conductive adhesive structure for lithium battery according to claim 1, characterized in that: The insulating thermally conductive adhesive sheet (3) at the welding point of the lithium battery electrode is a circular sheet structure, and the insulating thermally conductive adhesive sheet (2) at the end surface of the lithium battery electrode is a circular sheet structure. The insulating thermally conductive adhesive sheet (3) at the welding point of the lithium battery electrode is located inside the insulating thermally conductive adhesive sheet (2) at the end surface of the lithium battery electrode, and the surface of the insulating thermally conductive adhesive sheet (3) at the welding point of the lithium battery electrode overlaps with the inner circle of the insulating thermally conductive adhesive sheet (2) at the end surface of the lithium battery electrode.

3. The insulating thermal conductive adhesive structure for lithium battery according to claim 1, characterized in that: The area of ​​the bottom surface of the connecting adhesive ring (4) attached to the insulating thermally conductive adhesive sheet (3) at the welding point of the lithium battery electrode is three times the area of ​​the insulating thermally conductive adhesive ring sheet (2) attached to the end surface of the lithium battery electrode; the inner diameter of the ring holding film (5) is equal to the inner diameter of the connecting adhesive ring (4), and the outer diameter of the ring holding film (5) is larger than the outer diameter of the connecting adhesive ring (4).

4. The insulating thermal conductive adhesive structure for lithium battery according to claim 1, characterized in that: The lithium battery electrode end surface insulating thermally conductive adhesive ring sheet (2) comprises a PET antistatic film backing ring (201), a glass fiber base material ring (202) and a silicone adhesive covering ring (203), wherein the PET antistatic film backing ring (201) is bonded to the top surface of the glass fiber base material ring (202), and the silicone adhesive covering ring (203) is coated on the bottom surface of the glass fiber base material ring (202).

5. The insulating thermal conductive adhesive structure for lithium battery according to claim 1, characterized in that: The insulating thermally conductive adhesive sheet (3) for the lithium battery electrode welding point comprises a PET antistatic film backing sheet (301), a glass fiber substrate sheet (302) and a silicone adhesive covering sheet (303), wherein the PET antistatic film backing sheet (301) is bonded to the top surface of the glass fiber substrate sheet (302), and the silicone adhesive covering sheet (303) is coated on the bottom surface of the glass fiber substrate sheet (302).

6. The insulating thermal conductive adhesive structure for lithium battery according to claim 1, characterized in that: The holding ring membrane (5) comprises an annular holding membrane (501) and a holding groove (502), wherein the holding groove (502) is arranged at the outer edge of the annular holding membrane (501).

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