CN211567155U

CN211567155U - Novel lithium ion battery wet-process high-porosity diaphragm

Info

Publication number: CN211567155U
Application number: CN201921731895.0U
Authority: CN
Inventors: 温恒
Original assignee: Ganzhou Norway Technology Co ltd
Current assignee: Ganzhou Norway Technology Co ltd
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-09-25
Anticipated expiration: 2029-10-15

Abstract

The utility model discloses a novel lithium ion battery wet process high porosity diaphragm, including the diaphragm, the diaphragm comprises top layer, middle level and lower top layer three-layer, pastes the connection between the three-layer, and the equidistant arch that is equipped with in the middle of two archs on the top layer, and the inner wall upper berth in gap hole is equipped with high temperature resistant layer, the utility model discloses an add zirconium dioxide ceramic layer and protection strip and protect the diaphragm, avoid the diaphragm shrink fracture, the electrolyte leakage of electrolytic layer is avoided to the inoxidizing coating of electrolytic layer both sides.

Description

Novel lithium ion battery wet-process high-porosity diaphragm

Technical Field

The utility model relates to a battery diaphragm field specifically is a novel high porosity diaphragm of lithium ion battery wet process.

Background

Along with the development of economic technology, electronic equipment is used more and more, lithium ion batteries are widely used in various electronic equipment due to the advantages of high energy density, long cycle life, high safety performance and the like, a diaphragm is one of the key components of the lithium ion batteries, and the existing diaphragm has some problems in use; firstly, with the long-term use of the battery, the temperature in the battery can be gradually increased, the diaphragm can be shrunk after the temperature is too high, and the connecting layers of the diaphragm are tilted, so that the circulation isolation function of the diaphragm can be lost; and secondly, the safety performance is low, so that the electrolyte is easy to leak, and the damage of the diaphragm is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel lithium ion battery wet process high porosity diaphragm to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a novel lithium ion battery wet process high porosity diaphragm, includes the diaphragm, the diaphragm comprises top layer, middle level and lower top layer three-layer, pastes the connection between the three-layer, the equidistant arch that is equipped with, two on the top layer the protruding middle gap hole that is equipped with, the inner wall upper berth in gap hole is equipped with high temperature resistant layer.

Preferably, the upper surface is divided into the three-layer, the upper surface top is the zirconium dioxide ceramic layer, be equipped with the basic unit in the middle of the upper surface, the waterproof layer has been laid to the basic unit below, the gap hole runs through the zirconium dioxide is preferred, the middle level comprises inoxidizing coating and electrolytic layer, the inoxidizing coating is equipped with two-layerly, the electrolytic layer pastes to be connected in the middle of two-layer inoxidizing coating, be equipped with the electrolyte in the electrolytic layer.

Preferably, a waterproof layer is laid on the top of the lower surface layer, a rubber layer is laid below the waterproof layer, heat dissipation holes are uniformly formed in the rubber layer, and the heat dissipation holes penetrate through the rubber layer to reach the waterproof layer.

Preferably, all install the protection strip on the outer wall all around the diaphragm, the upside of protection strip is located upper surface department and evenly is equipped with the fixed strip.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses an add the protection strip, fix the diaphragm in the protection strip, upper surface department is equipped with the zirconium dioxide ceramic layer, increases the mechanical strength of diaphragm, through protection strip and zirconium dioxide ceramic layer synergism, avoids the diaphragm to take place the condition of shrinkage fracture because of high temperature, and the fixed strip is fixed the diaphragm, has strengthened stability between each layer, avoids taking place the phenomenon of perk between each layer; two sides of the electrolytic layer are provided with protective layers for protecting the electrolytic layer, so that the electrolyte in the electrolytic layer is prevented from leaking and affecting the diaphragm; the bulges on the upper surface layer and the rubber layer on the lower surface layer cooperate to protect the diaphragm, so that the diaphragm is buffered when being vibrated, and the damage to the diaphragm caused by vibration is reduced.

Drawings

FIG. 1 is a schematic perspective view of a diaphragm;

fig. 2 is a schematic view of the internal structure of the separator.

In the figure: 1 diaphragm, 2 bulges, 3 gaps, 4 protective strips, 5 fixing strips, 6 high-temperature resistant layers, 7 zirconium dioxide ceramic layers, 8 base layers, 9 waterproof layers, 10 antistatic particles, 11 rubber layers, 12 heat dissipation holes, 13 protective layers, 14 electrolyte layers, 15 electrolyte, 16 upper surface layers, 17 middle layers and 18 lower surface layers.

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. 1-2, the present invention provides a technical solution: a novel wet high-porosity diaphragm of a lithium ion battery comprises a diaphragm, wherein the diaphragm consists of an upper surface layer 16, a middle layer 17 and a lower surface layer 18, the three layers are connected in a sticking mode, protrusions 2 are arranged on the upper surface layer 16 at equal intervals, a gap hole 3 is formed between the two protrusions 2, and a high-temperature-resistant layer 6 is laid on the inner wall of the gap hole 3.

The upper surface layer 16 is divided into three layers, the top end of the upper surface layer 16 is a zirconium dioxide ceramic layer 7, a base layer 8 is arranged in the middle of the upper surface layer 16, a waterproof layer 9 is laid below the base layer 8, the gap holes 3 penetrate through the zirconium dioxide ceramic layer 7 and the base layer 8 to reach the waterproof layer 9, antistatic particles 10 are uniformly arranged in the waterproof layer 9, the zirconium dioxide ceramic layer 7 increases the mechanical strength of the diaphragm 1, and the antistatic particles 10 remove static in the lithium ion battery.

The middle layer 17 consists of a protective layer 13 and an electrolytic layer 14, the protective layer 13 is provided with two layers, the electrolytic layer 14 is adhered and connected between the two protective layers 13, the electrolytic layer 14 is internally provided with electrolyte 15, and the protective layer 13 protects the electrolytic layer 14 to prevent the electrolyte 15 in the electrolytic layer 14 from leaking.

Waterproof layer 9 has been laid at 18 tops in lower surface layer, and rubber layer 11 has been laid to waterproof layer 9 below, evenly is equipped with louvre 12 in the rubber layer 11, and louvre 12 runs through rubber layer 11 and reaches waterproof layer 9, and rubber layer 11 cushions diaphragm 1 when taking place vibrations, reduces vibrations and causes the damage to diaphragm 1.

All install protection strip 4 on the outer wall all around of diaphragm 1, the upside of protection strip 4 is located upper surface department and evenly is equipped with fixed strip 5, fixes the protection to diaphragm 1, avoids taking place the shrink fracture between diaphragm 1.

The working principle is as follows: the layers are bonded through an adhesive, the four sides of the diaphragm 1 are protected and fixed through the protective strips 4, the mechanical strength of the diaphragm 1 is enhanced through the zirconium dioxide ceramic layer 7 in the upper surface layer 16, the situation that the diaphragm 1 is shrunk and broken due to high temperature is avoided through the synergistic effect of the protective strips 4 and the zirconium dioxide ceramic layer 7, the diaphragm 1 is fixed through the fixing strips 5, the stability among the layers is enhanced, the phenomenon that the layers are tilted to cause damage to the diaphragm 1 is avoided, when the temperature of the lithium battery is overhigh, the high-temperature resistant layer 6 in the gap hole 3 shrinks to seal the gap hole 3, the radiating holes 12 in the rubber layer 11 radiate the diaphragm 1 to reduce the influence of the high temperature on the diaphragm 1, the protective layers 13 are arranged on the two sides of the electrolytic layer 14 to protect the electrolytic layer 14 and avoid the leakage of electrolyte 15 in the electrolytic layer 14 to cause the influence on the diaphragm 1, the bulges 2 and the rubber layer 11 on the upper surface layer 16 cooperate with each other to protect the diaphragm 1, so that the diaphragm 1 is buffered when vibration occurs, and the damage to the diaphragm 1 caused by the vibration is reduced.

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 a novel lithium ion battery wet process high porosity diaphragm, includes the diaphragm, its characterized in that: the diaphragm comprises an upper surface layer (16), a middle layer (17) and a lower surface layer (18), the three layers are connected in a sticking mode, protrusions (2) are arranged on the upper surface layer (16) at equal intervals, a gap hole (3) is formed in the middle of each protrusion (2), and a high-temperature-resistant layer (6) is laid on the inner wall of each gap hole (3).

2. The novel wet-process high-porosity membrane for lithium ion batteries according to claim 1, wherein: go up top layer (16) and divide into the three-layer, top layer (16) top is zirconium dioxide ceramic layer (7), be equipped with basic unit (8) in the middle of top layer (16), waterproof layer (9) have been laid to basic unit (8) below, gap hole (3) run through zirconium dioxide ceramic layer (7) and basic unit (8) and reach waterproof layer (9), evenly be equipped with antistatic particle (10) in waterproof layer (9).

3. The novel wet-process high-porosity membrane for lithium ion batteries according to claim 1, wherein: the middle layer (17) is composed of a protective layer (13) and an electrolytic layer (14), the protective layer (13) is provided with two layers, the electrolytic layer (14) is adhered to the middle of the two protective layers (13), and electrolyte (15) is arranged in the electrolytic layer (14).

4. The novel wet-process high-porosity membrane for lithium ion batteries according to claim 1, wherein: waterproof layer (9) have been laid at lower top layer (18) top, rubber layer (11) have been laid to waterproof layer (9) below, evenly be equipped with louvre (12) in rubber layer (11), louvre (12) run through rubber layer (11) and reach waterproof layer (9).

5. The novel wet-process high-porosity membrane for lithium ion batteries according to claim 1, wherein: all install protection strip (4) on diaphragm (1) outer wall all around, the upside of protection strip (4) is located upper surface department and evenly is equipped with fixed strip (5).