CN205452432U

CN205452432U - Battery sheet structure

Info

Publication number: CN205452432U
Application number: CN201521143020.0U
Authority: CN
Inventors: 邢飞; 李志行
Original assignee: NEOSONIC ENERGY TECHNOLOGY CORP
Current assignee: NEOSONIC ENERGY TECHNOLOGY CORP
Priority date: 2015-12-31
Filing date: 2015-12-31
Publication date: 2016-08-10
Anticipated expiration: 2025-12-31

Abstract

The utility model provides a battery sheet structure, including a metal substrate, a supporting layer and a dressing layer. This supporting layer includes a plurality of support piece, sets up in this metal substrate's surface to these support piece looks intervals, this dressing layer sets up in this surface of this metal substrate, and covers these support piece. Through this supporting layer and these support piece's design, can play the support effect, and can provide the dressing layer good supported effects, and then promote its every unit volume's rate properties and energy density.

Description

Battery pole piece structure

Technical field

This utility model is relevant with battery；Particularly relate to a kind of battery pole piece structure with high-rate discharge ability.

Background technology

Along with development and the evolution of electronic technology, the equipment such as running gear, mobile carrier the most constantly rises for the demand of power supply, accumulator.Wherein, being most widely used with the battery of the kind such as lithium ion battery, lithium ion polymer battery, portable electronic products, electric tool, electric motor car such as, even aviation, the application of the most visible lithium battery of armament industry especially.

Wherein, in the middle of the preparation of battery pole piece, lay graphite linings the most on metal base, and through the hole of this graphite linings increase battery pole piece, to increase the battery pole piece absorbability to electrolyte.Only, in the manufacturing process of battery pole piece, after laying graphite linings on metal base, typically require again through rolling, the techniques such as spreading, so that graphite linings can be firmly placed on metal base, but, when graphite linings is through rolling, after the techniques such as spreading, its structure is easily subsided and is tended to sturdy, the density of its compacting is too high, and the hole of pole piece can be caused to reduce, and greatly reduce the pole piece absorbability for electrolyte, in addition, discharge-rate and the surface volume of its battery can decline therewith than also, and the problem producing battery energy storage inefficiency.Other one is mentioned that, such situation is the most serious in the making of cathode pole piece.

Utility model content

In view of this, the purpose of this utility model is to provide a kind of battery pole piece structure, can promote discharge-rate and the cyclicity thereof of battery, and provide higher surface volume ratio can increase the energy density of battery.

Edge is to reach above-mentioned purpose, and a kind of battery pole piece structure that this utility model provides includes a metal base, a supporting layer and a dressing layer.This supporting layer includes multiple support member, and these support members are arranged at the surface of this metal base at intervals；This dressing layer is arranged at this surface of this metal base, and covers these support members.

Wherein, this metal base is selected from gold material, silver material, nickel material, aluminium, copper material or aforesaid combination.

Wherein, the hardness of this supporting layer is higher than the hardness of this dressing layer.

Wherein, these support members are made up of Graphene (Graphene).

Wherein, this dressing layer is made up of graphite.

Wherein, these support members are respectively arranged on two apparent surfaces of this metal base.

Wherein, the thickness of this metal base is T1, and the thickness of this supporting layer is T2, and it meets following condition:More than or equal to 0.5 and less than or equal to 1.5.

Wherein, these support members are with the setting that is staggered.

Wherein, the surface of this metal base has a first area and is positioned at two second areas of both sides of this first area, and these support members are arranged at the surface of the first area of this metal base.

Wherein, the width of this first area is W1, and the width of this second area is W2, and it meets following condition: W1:W2=4:1.

Effect of the present utility model is, the support effect played through this supporting layer, it is possible to provide the support effect that dressing layer is good so that it is be difficult to subside, and then promotes high rate performance and the energy density of battery per unit volume.

Accompanying drawing explanation

Fig. 1 is the battery pole piece structure of this utility model one preferred embodiment, shows the arrangement schematic diagram that support member is arranged on metal base.

Fig. 2 is the partial cutaway schematic of the battery pole piece structure of above-mentioned preferred embodiment.

Fig. 3 is the partial cutaway schematic of the battery pole piece structure of another preferred embodiment.

Fig. 4 is the partial enlarged drawing of the battery pole piece structure of another preferred embodiment, discloses the arrangement kenel of another kind of support member.

Fig. 5 is the partial enlarged drawing of the battery pole piece structure of another preferred embodiment, discloses the arrangement kenel of another kind of support member.

Description of reference numerals

1 battery pole piece structure

10 metal bases

12 first areas

14 second areas

20 supporting layers

22 support members

30 dressing layers

T1, T2 thickness

W1, W2 width

2 battery pole piece structures

40 metal bases

52,54 support member

60 dressing layers

70 support members

80 support members

Detailed description of the invention

For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with specific embodiment, and referring to the drawings, this utility model is further described.

For this utility model can be illustrated more clearly that, after now lifting a preferred embodiment and coordinating graphic detailed description such as.Please join shown in Fig. 1 and Fig. 2, for the battery pole piece structure 1 of this utility model one preferred embodiment, it includes metal base 10, supporting layer 20 and a dressing layer 30.Wherein:

This metal base 10 is in flake, its material is selected from gold material, silver material, nickel material, aluminium, copper material or aforesaid combination, and in the middle of the present embodiment, this metal base 10 is as a example by the Copper Foil made by copper material, and the most also can be selected for him in other embodiments and plant material, and be not limited with copper material.

Additionally, the surface of this metal base 10 has a first area 12 and is positioned at two second areas 14 of these both sides, first area 12, wherein, the width of this first area 12 is W1, the width of this second area 14 is W2, and it meets following conditional: W1:W2=4:1.

This supporting layer 20 includes multiple support member 22, and these support members 22 are arranged at the surface of the first area 12 of this metal base 10 at intervals, and in checkerboard arrangement.In the present embodiment, these support members 22 are made up of Graphene (Graphene), and it has the advantage that high rigidity, light weight, high conductivity and electrochemical properties are stable.In other actual enforcement, these support members 22 also can be made up of the conducting polymer of other kind, or is made up of the composite of Graphene with other conducting polymer, and is not limited with above-described embodiment.

This dressing layer 30 is arranged at the surface of this metal base 10, and covers these support members 22；Wherein, the hardness of this supporting layer 20 is higher than the hardness of this dressing layer 30.In the middle of the present embodiment, this dressing layer 30 is made up of graphite (Graphite), for example, it can use expandable graphite, preferably, can be selected for ultra-thin expandable graphite (ultrathingraphitefoam, UGF) as dressing layer of the present utility model, it has lightweight, high conductivity, high surface volume ratio and mushy characteristic, contributes to promoting the energy density of battery.

Wherein, the battery pole piece structure 1 of this utility model can be made by following method: first, is first pulled an oar by Graphene, to form Graphene serosity, then Graphene serosity is coated on the surface of metal base 10；Then, by the Graphene serosity baking and curing on metal base 10 surface in the way of high-temperature baking, to form these support members 22；Then, then dressing (graphite) is coated on metal base 10, and is coated with these support members 22, then dressing is fixedly combined in metal base 10 and the surface of these support members 22 through such as the techniques such as rolling, spreading, and form dressing layer 30.

It is worth mentioning that, design higher than the structure of the supporting layer 20 of dressing layer 30 through above-mentioned hardness, when dressing layer 30 pressurized, can pass through the spaced architectural characteristic of support member 22 of these high rigidity, the support effect that dressing layer 30 is good can be provided, and playing support effect so that the hole of dressing layer will not be compressed to obtain excessively consolidation.Consequently, it is possible to have the electrolyte liquid absorption of dressing layer, raising discharge-rate and the circulating effect of raising electrolyte being difficult to make dressing layer subside, improving per unit volume, in addition, more can have higher surface volume ratio, to increase battery energy density.

Another is mentioned that, for providing good support effect, described metal base and the thickness relationship of supporting layer can adopt following design:More than or equal to 0.5 and less than or equal to 1.5, wherein T1 is the thickness of this metal base 10, and T2 is the thickness of this supporting layer 20.In an embodiment preferably, optionalRatio make, and can obtain preferably electrolyte liquid absorption, preferably cycle efficieny and improve volume energy density.

Additionally, electrode plates structure of the present utility model is in addition to having supporting layer and dressing layer in the single surface configuration of metal base, please join shown in Fig. 3, in the battery pole piece structure 2 of an embodiment, on two relative surfaces of metal base 40, can be respectively arranged with supporting layer (including multiple support member 52,54), and repaste on the surface of metal base 40 with these support members 52,54 and be covered with dressing layer 60.In addition, be divided into the support member 52,54 on 40 liang of surfaces of metal base not with two-by-two back to set-up mode be limited, in an embodiment, these support members 52 and these support members 54 also can adopt two-by-two back to and the mode that is staggered arrange, and be not limited with above-described embodiment.

In addition, the arrangement mode of described support member is not limited in chequered order mode, for example, please coordinate shown in Fig. 4, in an embodiment, these support members 70 also can take the mode arranged that is staggered, or crisscross mode is arranged, in addition, it is possible to take other kind of arrangement mode such as honeycomb arrangement, concentric circular annular array, and be not limited with foregoing.

Further it is mentioned that, the shape of described support member is not limited with square, for example, may be designed as triangle, rhombus, long strip type or other kind polygonal shape design, separately please join shown in Fig. 5, support member 80 may be designed as cross structure, in addition, in the middle of other embodiment, support member also can take the most semi-moon shaped mode of star to design, and is not limited with the content of above-described embodiment.

Particular embodiments described above; the purpose of this utility model, technical scheme and beneficial effect are further described; it is it should be understood that; the foregoing is only specific embodiment of the utility model; it is not limited to this utility model; all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. done, within should be included in protection domain of the present utility model.

Claims

1. a battery pole piece structure, it is characterised in that including:

One metal base；

One supporting layer, includes multiple support member, and these support members are arranged at the surface of this metal base at intervals；And

One dressing layer, is arranged at this surface of this metal base, and covers these support members.

2. battery pole piece structure as claimed in claim 1, it is characterised in that the hardness of this supporting layer is higher than the hardness of this dressing layer.

3. battery pole piece structure as claimed in claim 1, it is characterised in that these support members are made up of Graphene.

4. battery pole piece structure as claimed in claim 1, it is characterised in that this dressing layer is made up of graphite.

5. battery pole piece structure as claimed in claim 1, it is characterised in that these support members are respectively arranged on two apparent surfaces of this metal base.

6. battery pole piece structure as claimed in claim 1, it is characterised in that the thickness of this metal base is T1, and the thickness of this supporting layer is T2, it meets following condition:More than or equal to 0.5 and less than or equal to 1.5.

7. battery pole piece structure as claimed in claim 1, it is characterised in that these support members are with the setting that is staggered.

8. battery pole piece structure as claimed in claim 1, it is characterised in that the surface of this metal base has a first area and is positioned at two second areas of both sides of this first area, and these support members are arranged at the surface of the first area of this metal base.

9. battery pole piece structure as claimed in claim 8, it is characterised in that the width of this first area is W1, and the width of this second area is W2, and it meets following condition: W1:W2=4:1.