CN214625102U

CN214625102U - Quick-charging lithium ion battery

Info

Publication number: CN214625102U
Application number: CN202121300694.2U
Authority: CN
Inventors: 曾金生; 秦代强; 陈云; 彭久立; 袁路平; 唐德富; 刘会洋
Original assignee: Huizhou Dianming New Energy Technology Co ltd
Current assignee: Huizhou Dianming New Energy Technology Co ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2021-11-05
Anticipated expiration: 2031-06-10

Abstract

The utility model relates to a quick-charging lithium ion battery, which comprises an electric core arranged in a shell, wherein the electric core comprises a positive pole piece, a diaphragm and a negative pole piece which are sequentially stacked; the negative pole piece includes the mass flow body, the mass flow body includes the substrate, the surface of substrate is equipped with the reinforcing mesh, the reinforcing mesh includes a plurality of meshes that are the array and arrange, the substrate corresponds the mesh and is equipped with the through-hole. The utility model discloses a quick charge lithium ion battery can effectively fix active material, is favorable to improving active material's thickness, and then improves energy density and charging speed.

Description

Quick-charging lithium ion battery

Technical Field

The utility model relates to a lithium cell field particularly, relates to a quick charge lithium ion battery.

Background

The lithium ion battery has the advantages of high energy density, small self-discharge, long service life and the like, and is widely applied to the fields of portable electronic equipment, electric toys, Bluetooth earphones, intelligent wearable equipment and the like. With the development of miniaturization and portability of modern electronic products, people have higher and higher requirements on batteries, and lithium batteries with higher energy density and faster charge and discharge are the future development trend in the field of batteries.

The existing lithium ion battery pole piece is usually to coat active material slurry on the surface of a current collector, in order to improve energy density and accelerate charging speed, the thickness of the active material needs to be increased, for thicker active materials, the existing current collector structure cannot be stably fixed, the active materials are easy to crack, fall off and the like in the use process, and the requirement of a high-performance lithium battery cannot be met.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a quick charge lithium ion battery can effectively fix active material, is favorable to improving active material's thickness, and then improves energy density and charging speed.

A quick-charging lithium ion battery comprises a battery cell arranged in a shell, wherein the battery cell comprises pole pieces and a diaphragm arranged between the pole pieces; the pole piece includes the mass flow body, the mass flow body includes the substrate, the surface of substrate is equipped with the reinforcing mesh, the reinforcing mesh includes a plurality of meshes that are the array and arrange, the substrate corresponds the mesh and is equipped with the through-hole.

Furthermore, one side of the reinforcing net, which faces the base material, is provided with a plurality of connecting convex points, and the connecting convex points are abutted to the surface of the base material.

Further, the pole piece includes positive pole piece and negative pole piece, at least one of positive pole piece and negative pole piece is equipped with the mass flow body.

Further, the surface of the current collector surface is coated with an active substance.

Furthermore, the reinforcing nets are symmetrically arranged on two surfaces of the base material.

Further, the surface of the substrate is a rough surface.

Further, the meshes are square, regular triangle or regular hexagon.

Further, the base material is copper foil or aluminum foil.

Compared with the prior art, the beneficial effects of the utility model are that: set up the reinforcing mesh on the surface of substrate, active material can fill in the mesh of reinforcing mesh to guarantee active material's stability, improve overall structure's intensity, avoid the active material condition of ftractureing, droing. The reinforcing net is provided with the connecting convex points, the reinforcing net is abutted to the base material through the connecting convex points, the contact area of the reinforcing net and the base material can be reduced, the internal resistance is reduced, and the charging and discharging performance of the battery is improved. The substrate corresponds the mesh and is equipped with the through-hole, can make the active material of substrate both sides form a whole, is favorable to the stability of structure on the one hand, and on the other hand helps improving the charge-discharge performance of battery.

Drawings

Fig. 1 is a schematic structural diagram of the fast charging lithium ion battery of the present invention.

Fig. 2 is the structure diagram of the pole piece of the fast charging lithium ion battery of the present invention.

Fig. 3 is the structure schematic diagram of the current collector of the fast charging lithium ion battery of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

As shown in fig. 1 to fig. 3, in a preferred embodiment, the rapid charging lithium ion battery of the present invention mainly includes a casing 1, a battery cell 2 is disposed in the casing 1, the battery cell 2 includes a pole piece 3 and a diaphragm 4, it can be understood that the pole piece 3 specifically includes a positive pole piece and a negative pole piece, and the diaphragm 4 is disposed between the positive pole piece and the negative pole piece.

The electrode sheet 3 includes a current collector 5 and an active material 8, the active material 8 is coated on the surface of the current collector 5, and the active material 8 may be the existing one, which is not limited in this embodiment. The current collector 5 comprises a substrate 6 and a reinforcing mesh 7, and the substrate 6 can be a copper foil or an aluminum foil. The surface of the substrate 6 is preferably a rough surface to improve adhesion to the active material 8. The reinforcing mesh 7 is disposed on at least one surface of the substrate 6, and in this embodiment, the reinforcing mesh 7 is symmetrically disposed on two sides of the substrate 6 to improve the overall strength of the electrode plate 3. Reinforcing net 7 includes a plurality of meshs 9 that are the array and arrange, and meshs 9 are preferably regular triangle, square, or regular hexagon to guarantee that reinforcing net 7 itself has more stable structure, and the meshs 9 of this embodiment adopt regular hexagon. Set up reinforcing mesh 7 on the surface of substrate 6 for active material 8 can fill in reinforcing mesh 7's mesh, thereby guarantee active material 8's stability, improve overall structure's intensity, avoid active material 8 fracture, the condition that drops.

The substrate 6 is provided with a through hole 10 corresponding to the mesh 9, the through hole 10 is arranged at the center of the mesh 9, and the through hole 10 penetrates through the two sides of the substrate 6, so that the active materials 8 on the two sides of the substrate 6 form a whole, thereby being beneficial to the stability of the structure on one hand and being beneficial to improving the charge and discharge performance of the battery on the other hand.

The reinforcing mesh 7 is provided with a plurality of connecting bumps 11 on one side facing the substrate 6, the connecting bumps 11 are abutted against the surface of the substrate 6, and in the embodiment, the connecting bumps 11 are formed into hemispheres protruding out of the surface of the reinforcing mesh 7. It should be noted that, the provision of the reinforcing mesh 7 on the surface of the base material 6 increases the internal resistance of the base material 6, and in this embodiment, the connection bumps 11 are provided on the reinforcing mesh 7, and the connection bumps 11 are in contact with the base material 6, so that the contact area between the reinforcing mesh 7 and the base material 6 can be reduced, thereby reducing the internal resistance and improving the charge and discharge performance of the battery.

It should be noted that the current collector 5 structure may be disposed on one of the positive electrode plate or the negative electrode plate, or disposed on both the positive electrode plate and the negative electrode plate, and this embodiment is not limited herein.

In the description of the present invention, it is to be understood that the terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.

Claims

1. A quick-charging lithium ion battery comprises a battery cell arranged in a shell, wherein the battery cell comprises pole pieces and a diaphragm arranged between the pole pieces; its characterized in that, the pole piece includes the mass flow body, the mass flow body includes the substrate, the surface of substrate is equipped with the reinforcing mesh, the reinforcing mesh includes a plurality of meshes that are the array and arrange, the substrate corresponds the mesh and is equipped with the through-hole.

2. The lithium ion battery of claim 1, wherein the reinforcing mesh is provided with a plurality of connecting protrusions on a side facing the substrate, and the connecting protrusions are abutted against the surface of the substrate.

3. The fast charging lithium ion battery of claim 1, wherein the pole pieces comprise a positive pole piece and a negative pole piece, at least one of the positive pole piece and the negative pole piece being provided with the current collector.

4. The fast charging lithium ion battery of claim 1, wherein a surface of the current collector is coated with an active material.

5. The lithium ion battery of claim 1, wherein the reinforcing mesh is symmetrically disposed on both surfaces of the substrate.

6. The fast charging lithium ion battery of claim 1, wherein the surface of the substrate is a rough surface.

7. The fast charging lithium ion battery of claim 1, wherein the mesh is square, regular triangular, or regular hexagonal.

8. The fast charging lithium ion battery of claim 1, wherein the substrate is a copper foil or an aluminum foil.