Separator and lithium battery

Abstract

The utility model relates to the technical field of kinetic energy batteries, in particular to a separator and a lithium battery, the separator is configured in a lithium battery shell and comprises a disc body and a separating ring, the disc body is attached to the inner end face of the lithium battery shell, the separating ring is formed by bending the outer ring part of the disc body once, the separating ring is thinner than the disc body, and the separating ring is made of a plastic material. The disc body needs to be thickened to ensure the overall strength of the separator, the isolating ring needs to be thinned to avoid occupying the laying space of the roll core, and the isolating ring is attached to the axial inner wall surface of the lithium battery shell to isolate the roll core arranged in the lithium battery shell from the lithium battery shell, so that the existing process of coating a film on the roll core is replaced, the material for coating the film is saved, and the production cost is reduced. Therefore, the technical problems that in the prior art, due to the fact that the roll core needs to be coated with the film, the number of manufacturing procedures of the lithium battery is large, and the cost of the finished lithium battery is high are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to kinetic energy battery technical field, concretely relates to an isolator and lithium battery. BACKGROUND

[0002] In the structure of lithium battery, the winding core is connected with the current collecting disc, and then is placed into the shell of lithium battery. The winding core and the inside of the shell cannot be contacted. At present, an insulating film is pasted on the winding core to isolate the winding core and the shell. However, the film pasting process on the winding core is time-consuming and material-consuming, and cannot meet the demand of low cost in the industry. SUMMARY

[0003] In order to solve the technical problem that the manufacturing process of lithium battery is more and the cost of finished product is high due to the film pasting on the winding core in the prior art, the application provides an isolator and lithium battery, which solves the above technical problem.

[0004] The technical scheme adopted by the utility model to solve its technical problem is:

[0005] The utility model provides a kind of isolator, comprising: disc body, the disc body is configured in lithium battery shell, and the disc body is attached on the inner end surface of lithium battery shell;Isolation ring, the isolation ring is formed by the outer ring portion of the disc body after once bending, the thickness of the isolation ring is less than the thickness of the disc body, and the isolation ring is attached on the axial inner wall surface of lithium battery shell, to isolate the winding core configured in lithium battery shell and lithium battery shell.

[0006] Further, the bending part of the disc body to the isolation ring is attached at the internal corner of the lithium battery shell, and is tangent to the internal corner of the lithium battery shell.

[0007] Further, the disc body gradually thins from the middle part that has not started bending to the isolation ring.

[0008] Further, a support ring is formed on one side of the disc body facing the winding core.

[0009] Further, the support ring is formed by a plurality of support columns that are spaced apart and form a whole ring.

[0010] Further, a receiving step is formed on the side of the disc body away from the winding core.

[0011] The utility model further provides a kind of lithium battery, comprising: the above-mentioned isolator, the isolator includes two receiving steps;Pole, one end of the pole is placed into one of the receiving steps;Explosion-proof aluminum sheet, the explosion-proof aluminum sheet is placed into another receiving step.

[0012] Further, the isolation piece comprises at least three supporting rings, which are respectively supported on the explosion-proof aluminum sheet, the pole and the shell of the lithium battery.

[0013] Based on the above technical solution, the technical effects that can be achieved by the utility model are as follows:

[0014] The isolation piece of the utility model is arranged in the lithium battery shell, comprising a disc body and an isolation ring, the disc body is attached to the inner end face of the lithium battery shell, the isolation ring is formed by once bending the outer ring part of the disc body, the isolation ring is thinner than the disc body, the disc body needs to be thick to ensure the overall strength of the isolation piece, and the isolation ring needs to be thin to avoid occupying the laying space of the winding core, the isolation ring is attached to the axial inner wall surface of the lithium battery shell to isolate the winding core arranged in the lithium battery shell from the lithium battery shell, thereby replacing the existing film covering process on the winding core, saving the film covering material and the film covering process, thereby solving the technical problems of the prior art that the lithium battery manufacturing process is long and the finished lithium battery cost is high due to the need of film covering on the winding core. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a sectional view of the isolation piece of the utility model;

[0016] Fig. 2 It is a bottom view of the isolation piece of the utility model;

[0017] Fig. 3 It is a schematic view of the lithium battery of the utility model.

[0018] Wherein: 1-disc body, 11-isolation ring, 12-supporting ring, 121-supporting column, 13-accepting step; 2-shell; 3-winding core, 31-current collecting disc; 4-pole; 5-explosion-proof aluminum sheet. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0020] For example, Figs. 1-3As shown, the utility model provides a kind of isolator, for lithium battery, including disc body 1 and isolation ring 11, disc body 1 is configured in lithium battery shell 2, disc body 1 is attached on the inner end surface of lithium battery shell 2, isolation ring 11 is formed after the outer ring portion of disc body 1 is bent once, the thickness of isolation ring 11 is less than the thickness of disc body 1, isolation ring 11 is attached on the axial inner wall surface of lithium battery shell 2, to isolate the winding core 3 configured in lithium battery shell 2 with lithium battery shell 2.

[0021] The utility model discloses an isolator, be configured in lithium battery shell 2, including disc body 1 and isolation ring 11, disc body 1 is attached on the inner end surface of lithium battery shell 2, isolation ring 11 is formed after the outer ring portion of disc body 1 is bent once, isolation ring 11 is thinner than disc body 1, disc body 1 needs to be thick to ensure the overall strength of isolator, isolation ring 11 needs to be thin, to avoid the laying space of winding core 3 is squeezed, isolation ring 11 is attached on the axial inner wall surface of lithium battery shell 2, to isolate the winding core 3 configured in lithium battery shell 2 with lithium battery shell 2, to replace the existing process of film covering on winding core 3, save the material of film covering, omit the process of film covering, to solve the technical problem of multiple manufacturing procedures of lithium battery and high cost of finished product lithium battery in prior art due to the need of film covering on winding core 3.

[0022] In a preferred embodiment of the utility model, the bending part of disc body 1 to isolation ring 11 is attached at the internal corner of lithium battery shell 2, tangent to the internal corner of lithium battery shell 2, to facilitate the assembly of lithium battery shell 2 and isolator.

[0023] In a preferred embodiment of the utility model, disc body 1 gradually thins from the middle part that has not started bending to isolation ring 11, while forming different thicknesses of disc body 1 and isolation ring 11, the forming of isolator is also considered, and the thinning position is formed in the middle part of disc body 1 that has not started bending, so that the isolator is more easily demoulded.

[0024] In a preferred embodiment of the utility model, a supporting ring 12 is formed on one side of disc body 1 facing winding core 3, which can make the internal structure of assembled lithium battery more stable. It should be noted that one end of winding core 3 is welded with a current collector 31, and the supporting ring 12 actually abuts against the current collector 31.

[0025] Further, the supporting ring 12 is formed by a plurality of supporting columns 121 spacedly distributed and integrally annular, which can save the material of the isolator without affecting the supportability, so as to reduce the cost.

[0026] In a preferred embodiment of the utility model, a receiving step 13 is formed on the side of disc body 1 away from winding core 3, to facilitate the assembly and positioning of other components of lithium battery.

[0027] AsFig. 3 The utility model also provides a lithium battery, including above-mentioned isolator, pole 4 and explosion -proof aluminium sheet 5, isolator includes two receiving steps 13, one receiving step 13 is used to receive positioning pole 4, and another receiving step 13 is used to receive positioning explosion -proof aluminium sheet 5.

[0028] In a preferred embodiment of the utility model, the isolator includes at least three support rings 12, which are respectively supported on the explosion-proof aluminum sheet 5, the pole 4 and the shell 2 of the lithium battery to ensure the overall structural stability of the lithium battery.

[0029] It should be understood that the specific embodiments described above are only used to explain the utility model and are not used to limit the utility model. The obvious changes or variations derived from the spirit of the utility model are still within the protection scope of the utility model.

Claims

1. A spacer, characterized in that The application relates to a lithium battery isolation piece. The application relates to a lithium battery isolation piece. The application relates to a lithium battery isolation piece.

2. The spacer of claim 1, wherein The application relates to a lithium battery isolation piece.

3. The spacer of claim 1, wherein The application relates to a lithium battery isolation piece.

4. The spacer of claim 1, wherein The application relates to a lithium battery isolation piece.

5. The spacer of claim 4, wherein The application relates to a lithium battery isolation piece.

6. The spacer of claim 5, wherein The application relates to a lithium battery isolation piece.

7. A lithium battery, characterized by The application relates to a lithium battery isolation piece. The application relates to a lithium battery isolation piece. The application relates to a lithium battery isolation piece. The application relates to a lithium battery isolation piece.

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