CN214505726U

CN214505726U - Environment-friendly electrostatic spraying lithium battery composite diaphragm

Info

Publication number: CN214505726U
Application number: CN202120595133.3U
Authority: CN
Inventors: 刘必军
Original assignee: Shenzhen Jialiye Technology Co ltd
Current assignee: Shenzhen Jialiye Technology Co ltd
Priority date: 2021-03-24
Filing date: 2021-03-24
Publication date: 2021-10-26
Anticipated expiration: 2031-03-24

Abstract

The utility model discloses an electrostatic spraying lithium cell composite membrane of environmental protection, including reel and diaphragm layer, the diaphragm layer includes that the first second that sets up from type paper layer and opposite side from the type paper layer that one side set up, and movable mounting is at the first diaphragm body that leaves type paper layer and second from type paper layer middle part, when using diaphragm body to assemble the lithium cell, take out diaphragm body from first type paper layer and second from type paper layer inboard, assemble the use, set up first type paper layer and second from type paper layer in diaphragm body both sides, can protect inside diaphragm body, be difficult for receiving the damage when the transportation, inside avoiding the dust to get into diaphragm body when using simultaneously, receive the influence when blockking up the thru hole and leading to follow-up lithium cell use, protect diaphragm body.

Description

Environment-friendly electrostatic spraying lithium battery composite diaphragm

Technical Field

The utility model relates to a lithium battery diaphragm technical field specifically is an electrostatic spraying lithium battery composite membrane of environmental protection.

Background

The separator is one of the most important uses of the battery, mainly in a narrow space. The negative plate is separated to prevent short circuit caused by contact of two electrodes. In addition to this, the separator should have the ability to pass ions in the electrolyte. Because the electrolyte of the lithium ion battery series is an organic solvent system, the diaphragm material is resistant to the organic solvent. The diaphragm has high biaxial tensile strength, high puncture strength, low shrinkage rate, high surface static-free porosity, uniform pore size distribution, good electrolyte wettability, lower pore closing temperature and higher film breaking temperature.

When the diaphragm is transported or processed for use after production, the diaphragm is directly exposed in the air due to the fact that no part for separating the diaphragm from the outer side is arranged on the outer side, and dust is stained on the surface of the diaphragm, and the diaphragm is inconvenient to use.

In order to solve the problems, an environment-friendly electrostatic spraying lithium battery composite diaphragm is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electrostatic spraying lithium cell composite membrane of environmental protection, when using diaphragm body to assemble the lithium cell, take out diaphragm body from type ply and second from the type ply inboard from first, assemble the use, set up first type ply and second at diaphragm body both sides from the type ply, can protect the diaphragm body of inside, be difficult for receiving the damage when the transportation, avoid inside the dust gets into diaphragm body when using simultaneously, it receives the influence when leading to follow-up lithium cell to block up the thru hole, protect diaphragm body, thereby the problem in the above-mentioned background art has been solved.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an electrostatic spraying lithium cell composite membrane of environmental protection, includes reel and diaphragm layer, and the reel outer wall is provided with swing joint's diaphragm layer, the diaphragm layer includes that the first second that sets up from type paper layer and opposite side from type paper layer to and movable mounting is at the first diaphragm body from type paper layer and second from type paper layer middle part from type paper layer.

Preferably, the diaphragm body comprises a diaphragm body and protective coatings arranged on two sides of the diaphragm body, the protective coatings are fixedly connected with the diaphragm body, a plurality of through holes are formed in the upper surface of the diaphragm body, and protruding blocks are arranged on two sides of the inner wall of each through hole.

Preferably, the bump block and the protective coating are both parts made of high-purity aluminum oxide material.

Preferably, the first release paper layer comprises a paper layer body and circular grooves formed in the upper end and the lower end of the paper layer body.

Preferably, the first release paper layer and the second release paper layer are parts made of the same material, the width of the first release paper layer and the width of the second release paper layer are larger than that of the diaphragm body, the upper end and the lower end of the second release paper layer are both provided with the blocking pieces, and the inner walls of the blocking pieces are provided with the circular pieces.

Preferably, the barrier is the same thickness as the diaphragm body, and the circular member is matched with the circular groove.

Preferably, the paper layer body comprises a base paper layer, a laminating film layer arranged on one side of the base paper layer and a silicon oil layer arranged on one side of the laminating film layer, and the silicon oil layer is attached to the diaphragm body.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model provides a pair of electrostatic spraying lithium cell composite membrane of environmental protection, when using the diaphragm body to assemble the lithium cell, take out the diaphragm body from first type ply and second type ply inboard, assemble the use, set up first type ply and second type ply in diaphragm body both sides, can protect the diaphragm body of inside, be difficult for receiving the damage when the transportation, inside avoiding simultaneously that the dust gets into the diaphragm body when using, receive the influence when blockking up the thru hole and leading to follow-up lithium cell to use, protect the diaphragm body.

2. The utility model provides a pair of electrostatic spraying lithium cell composite membrane of environmental protection, when the reel outside is rolled to the diaphragm layer, firstly leave type paper layer both sides and second from the type paper layer laminating installation, it is the same with diaphragm body thickness to separate the fender piece, when first from type paper layer both sides and second are from the type paper layer both sides rolling laminating promptly, it separates the fender piece with diaphragm body and outside and keeps off to separate the fender piece, avoid outside dust from the side to get into from diaphragm body both sides, the protectiveness is better, and circular member card is gone into the circular recess when the rolling, make first from type paper layer and second from type paper layer location, first from type paper layer and second from type paper layer dislocation production gap when avoiding the rolling, the protection is more thorough.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure of the membrane layer of the present invention;

fig. 3 is a schematic structural view of the diaphragm body of the present invention;

fig. 4 is an enlarged schematic structural view of a point a in fig. 2 according to the present invention;

fig. 5 is a schematic view of the structure of the paper layer body of the present invention.

In the figure: 1. a reel; 2. a separator layer; 21. a septum body; 211. a membrane body; 212. a protective coating; 213. through holes; 214. a protruding block; 22. a first release paper layer; 221. a paper layer body; 2211. a base paper layer; 2212. laminating the film layer; 2213. a silicon oil layer; 222. a circular groove; 23. a second release paper layer; 231. a barrier; 232. a circular member.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, an environment-friendly electrostatic spraying lithium battery composite diaphragm includes a winding drum 1 and a diaphragm layer 2, the diaphragm layer 2 is movably connected to an outer wall of the winding drum 1, the diaphragm layer 2 includes a first release paper layer 22 disposed on one side and a second release paper layer 23 disposed on the other side, and a diaphragm body 21 movably mounted in the middle of the first release paper layer 22 and the second release paper layer 23, the diaphragm body 21 includes a diaphragm body 211 and a protective coating 212 disposed on both sides of the diaphragm body 211, the protective coating 212 is fixedly connected to the diaphragm body 211, the upper surface of the diaphragm body 211 is provided with a plurality of through holes 213, both sides of an inner wall of the through holes 213 are provided with protruding blocks 214, the protruding blocks 214 and the protective coating 212 are parts made of high-purity aluminum oxide material, the high-purity aluminum oxide coating plays a role in heat resistance, high temperature resistance and insulation, and when a current is too large, because the high-purity aluminum oxide is a plate crystal structure, when the electric current is too big, the material generates heat, and then the high-purity nanometer alumina coating material of plate crystal structure will the volume expansion, will close thru hole 213 on the lithium cell diaphragm, thereby play the effect of blocking the electric current, thereby can prevent that the power battery is too high because of the temperature, the diaphragm melts and the short circuit, when using diaphragm body 21 to assemble the lithium cell, take out diaphragm body 21 from first release paper layer 22 and second release paper layer 23 inboard, assemble the use, set up first release paper layer 22 and second release paper layer 23 in diaphragm body 21 both sides, can protect inside diaphragm body 21, be difficult for receiving the damage when the transportation, avoid simultaneously inside the dust gets into diaphragm body 21 when using, it influences when blockking up thru hole 213 and leading to follow-up lithium cell use, protect diaphragm body 21.

Referring to fig. 1-5, the first release paper layer 22 includes a paper layer body 221 and circular grooves 222 formed at the upper and lower ends of the paper layer body 221, the paper layer body 221 includes a base paper layer 2211 and a laminating layer 2212 disposed at one side of the base paper layer 2211 and a silicone oil layer 2213 disposed at one side of the laminating layer 2212, the silicone oil layer 2213 is mounted in contact with the membrane body 21, the first release paper layer 22 and the second release paper layer 23 are made of the same material, the widths of the first release paper layer 22 and the second release paper layer 23 are greater than the width of the membrane body 21, the upper and lower ends of the second release paper layer 23 are respectively mounted with a barrier member 231, the barrier member 231 has the same thickness as the membrane body 21, when the membrane layer 2 is rolled outside the winding drum 1, the two sides of the first release paper layer 22 are mounted in contact with the second release paper layer 23, the barrier member 231 has the same thickness as the membrane body 21, that is rolled in the two sides of the first release paper layer 22 and the two sides of the second release paper layer 23, keep off piece 231 and separate diaphragm body 21 and the outside and keep off, avoid outside dust from the entering of diaphragm body 21 both sides from the side, the protectiveness is better, it installs circular member 232 to keep off piece 231 inner wall, circular member 232 and circular recess 222 phase-match, circular member 232 card goes into circular recess 222 when the rolling, make first from type paper layer 22 and second from type paper layer 23 fix a position, first from type paper layer 22 and second from type paper layer 23 dislocation production gap when avoiding the rolling, the protection is more thorough.

The working principle is as follows: when the lithium battery is assembled by using the diaphragm body 21, the diaphragm body 21 is taken out from the inner sides of the first release paper layer 22 and the second release paper layer 23 for assembly and use, the first release paper layer 22 and the second release paper layer 23 are disposed on two sides of the diaphragm body 21, so as to protect the diaphragm body 21 inside, and prevent dust from entering the diaphragm body 21 during use, when the diaphragm layer 2 is wound outside the winding drum 1, two sides of the first release paper layer 22 are attached to the second release paper layer 23, the thickness of the barrier member 231 is the same as that of the diaphragm body 21, namely, when the two sides of the first release paper layer 22 are rolled and adhered to the two sides of the second release paper layer 23, the barrier member 231 blocks the diaphragm body 21 from the outside, and the circular member 232 is clamped into the circular groove 222 during rolling, so that the first release paper layer 22 and the second release paper layer 23 are positioned, and the first release paper layer 22 and the second release paper layer 23 are prevented from being staggered to generate gaps during rolling.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an electrostatic spraying lithium cell composite membrane of environmental protection, includes reel (1) and diaphragm layer (2), and reel (1) outer wall is provided with swing joint's diaphragm layer (2), its characterized in that: the diaphragm layer (2) comprises a first release paper layer (22) arranged on one side and a second release paper layer (23) arranged on the other side, and a diaphragm body (21) movably arranged in the middle of the first release paper layer (22) and the second release paper layer (23).

2. The environment-friendly electrostatic spraying lithium battery composite separator as claimed in claim 1, wherein: the diaphragm body (21) comprises a diaphragm body (211) and protective coatings (212) arranged on two sides of the diaphragm body (211), the protective coatings (212) are fixedly connected with the diaphragm body (211), a plurality of through holes (213) are formed in the upper surface of the diaphragm body (211), and protruding blocks (214) are arranged on two sides of the inner wall of each through hole (213).

3. The environment-friendly electrostatic spraying lithium battery composite separator as claimed in claim 2, wherein: the bump (214) and the protective coating (212) are both parts made of a high-purity aluminum oxide material.

4. The environment-friendly electrostatic spraying lithium battery composite separator as claimed in claim 1, wherein: the first release paper layer (22) comprises a paper layer body (221) and circular grooves (222) formed in the upper end and the lower end of the paper layer body (221).

5. The environment-friendly electrostatic spraying lithium battery composite separator as claimed in claim 1, wherein: first from the part that paper layer (22) and second were made for the same material, and first from paper layer (22) and second from paper layer (23) width and be greater than the width of diaphragm body (21), second from paper layer (23) upper and lower both ends all install and separate fender piece (231), separate and keep off piece (231) inner wall and install circular member (232).

6. The environment-friendly electrostatic spraying lithium battery composite separator as claimed in claim 5, wherein: the barrier (231) has the same thickness as the diaphragm body (21), and the circular member (232) is matched with the circular groove (222).

7. The environment-friendly electrostatic spraying lithium battery composite separator as claimed in claim 4, wherein: the paper layer body (221) comprises a base paper layer (2211), a laminating layer (2212) arranged on one side of the base paper layer (2211) and a silicon oil layer (2213) arranged on one side of the laminating layer (2212), and the silicon oil layer (2213) is attached to the diaphragm body (21) for installation.