CN213071293U

CN213071293U - Button cell pole piece and button cell

Info

Publication number: CN213071293U
Application number: CN202021764895.3U
Authority: CN
Inventors: 江浩; 陈志勇
Original assignee: Guangdong Mic Power New Energy Co Ltd
Current assignee: Guangdong Mic Power New Energy Co Ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2021-04-27
Anticipated expiration: 2030-08-21

Abstract

The utility model relates to a button cell pole piece, including the pole piece body, be equipped with active material coating portion and utmost point ear extraction portion on the pole piece body, utmost point ear extraction portion is located a side of active material coating portion to fold into and become certain angle with active coating portion. The tab leading-out part is of a triangular or trapezoidal tooth-shaped structure. Pole piece structure has reduced the quality of nickel strap or aluminium strip, and occupation space is little, has improved button cell's mass concentration. The pole piece can effectively reduce the power consumption of the button cell, so that the cell has good circulation, small polarization and high-rate charge and discharge performance.

Description

Button cell pole piece and button cell

Technical Field

The utility model relates to a battery pole piece especially indicates a button cell pole piece that can realize that high magnification charges/discharges and use the battery of this pole piece.

Background

The lithium ion battery generally comprises a positive plate, a negative plate, a positive electrode tab and a negative electrode tab, wherein the positive electrode tab and the negative electrode tab are provided with tab connection structures, an insulating diaphragm is matched between the positive electrode tab and the negative electrode tab to wind the positive electrode tab and the negative electrode tab into a battery core, the positive electrode tab and the negative electrode tab are respectively welded with the positive electrode tab and the negative electrode tab, and the other end of the tab is. In order to realize high-rate charge and discharge of the battery, the positions of a plurality of welding lugs are required to be designed on a metal mother coil used as a pole piece substrate in the manufacturing process of a positive pole piece and a negative pole piece, and the mother coil is required to be redesigned due to the fact that pole pieces with different lengths are required in different models and the mother coil is different, so that the universality is weak. Especially for button cells, the internal space is small, the welded tabs need to be folded, and the effective space in the cells can be reduced by folding the tabs after multi-layer welding.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a can realize that high rate charges/discharged many utmost point ear button cell pole piece.

The utility model provides a pair of button cell pole piece, including the pole piece body, be equipped with active material coating portion and utmost point ear extraction portion on the pole piece body, its characterized in that, utmost point ear extraction portion is triangle-shaped or trapezoidal dentate structure.

The tab lead-out portion is located at one side of the active material coating portion and folded to form a certain angle with the active material coating portion.

The active coating part and the tab leading-out part extend along the length direction of the tab body.

The utility model discloses still claim the button cell who uses above-mentioned battery pole piece.

Compared with the prior art, the utility model discloses beneficial effect lies in: (1) the pole piece can effectively reduce the power consumption of the button battery, so that the battery has good circulation, small polarization and high-rate charge and discharge performance; (2) the pole piece structure reduces the mass of a nickel strip or an aluminum strip, occupies small space and improves the mass concentration of the battery. (3) The pole piece is easy to bend relative to the pole lug leading-out part structure arranged on the whole piece, and is more convenient for processing and assembling the button cell.

Drawings

FIG. 1 is a diagram of a first embodiment of the pole piece of the present invention;

fig. 2 is a schematic structural diagram of a second embodiment of the pole piece of the present invention.

Detailed Description

To facilitate understanding of those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, in this embodiment, the button cell pole piece includes a metal foil, i.e., a tab body 10, an active material layer is coated on the metal foil in a length direction to form an active coating portion 11, an exposed portion of the metal foil, which is located at an edge of the active coating portion 11 and is not coated with an active material, is cut into a triangular zigzag shape to form a tab leading-out portion 12, and the tab leading-out portion 12 is bent inward to form a certain angle with the active coating portion 11. The pole piece is suitable for being applied to the button cell, occupies a small space and can effectively improve the quality concentration of the cell.

The pole piece is completely coated with the active material layer within the set width range of the metal foil master roll in the length direction, and the exposed metal foil is reserved in the whole master roll along the length direction on the edge of the length direction coated with the active material layer, so that the size design of the pole piece and the coating of the active material are facilitated. When the battery is used, the metal foil is cut into pole pieces according to the required length, so that the battery is strong in universality and suitable for batteries of different sizes. The metal foil at the exposed part of the cut pole piece is processed into a triangular sawtooth shape, and then the triangular sawtooth is bent inwards to form a certain angle with the active material coating layer, namely a pole ear leading-out part. The lug leading-out part of the triangular sawtooth structure is easier to bend relative to the lug leading-out part structure of the whole arrangement or other structures, and the processing and assembling of the button battery are more convenient.

As shown in fig. 2, in this embodiment, the button cell pole piece includes a metal foil, i.e., a tab body 10, an active material layer is coated on the metal foil in a length direction to form an active coating portion 11, an exposed portion of the metal foil, which is located at an edge of the active coating portion 11 and is not coated with an active material, is cut into a trapezoidal sawtooth shape to form a tab leading-out portion 12, and the tab leading-out portion 12 is bent inward to form a certain angle with the active coating portion 11. The pole piece is suitable for being applied to the button cell, occupies a small space and can effectively improve the quality concentration of the cell. The tab lead-out part 12 of the trapezoidal structure shown in the embodiment facilitates the tab welding and has high one-time processing forming degree.

The above embodiments are merely preferred embodiments of the present invention, and in addition, other implementation manners of the present invention are also possible. That is, any obvious minor changes and equivalents should fall within the scope of the present invention without departing from the spirit of the present invention.

Claims

1. A button battery pole piece comprises a pole piece body, wherein an active material coating portion and a pole lug leading-out portion are arranged on the pole piece body, and the button battery pole piece is characterized in that the pole lug leading-out portion is of a triangular or trapezoidal tooth-shaped structure.

2. The button cell pole piece of claim 1, wherein: the tab lead-out part is positioned at one side of the active material coating part and is folded to form a certain angle with the active material coating part.

3. The button cell pole piece of claim 1, wherein: the active material coating part and the tab leading-out part extend along the length direction of the tab body.

4. A button cell is characterized in that: comprising a battery pole piece according to any one of claims 1 to 3.