CN213124674U

CN213124674U - Button cell

Info

Publication number: CN213124674U
Application number: CN202022260666.4U
Authority: CN
Inventors: 张庆; 张登峰; 陈守位; 卿小敏; 魏东
Original assignee: Dongguan Landian New Energy Technology Co ltd
Current assignee: Zhang Dengfeng
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-05-04
Anticipated expiration: 2030-10-12

Abstract

The utility model belongs to the technical field of the battery technique and specifically relates to indicate a button cell, including shell, anodal conductive shell fragment, the electrically conductive shell fragment of negative pole, anodal electrically conductive piece and set up the electric core inside the shell, the shell is equipped with the electrically conductive piece of negative pole, anodal electrically conductive piece is connected with the shell, the one end of electric core is equipped with anodal utmost point ear, the other end of electric core is equipped with negative pole utmost point ear, anodal electrically conductive shell fragment one end with anodal electrically conductive piece is connected, anodal electrically conductive shell fragment's the other end with anodal utmost point ear is connected, the electrically conductive shell fragment's of negative pole one end with the electrically conductive piece of negative pole is connected, the. The utility model discloses make anodal utmost point ear pass through anodal electrically conductive shell fragment and anodal electrically conductive piece to be connected, make negative pole utmost point ear pass through the electrically conductive shell fragment of negative pole and electrically conductive piece of negative pole to be connected, avoid the welding to reach the effect of simplifying battery assembly process, improving battery assembly efficiency.

Description

Button cell

Technical Field

The utility model belongs to the technical field of the battery technique and specifically relates to indicate a button cell.

Background

In the button cell, in order to ensure that the cell can stably discharge, the positive electrode tab and the positive electrode conductive piece are required to be stably connected, and the negative electrode tab and the negative electrode conductive piece are required to be stably connected. In the prior art, the connection of the tab and the conductive piece is realized by welding, which causes the complex assembly process of the battery and the low assembly efficiency.

Disclosure of Invention

The utility model discloses problem to prior art provides a button cell, can simplify button cell's assembly process and promote button cell's assembly efficiency.

The utility model adopts the following technical scheme: the utility model provides a button cell, includes that shell, anodal electrically conductive shell fragment, the electrically conductive shell fragment of negative pole, anodal electrically conductive piece and set up the electric core inside the shell, the shell is equipped with the electrically conductive piece of negative pole, anodal electrically conductive piece is connected with the shell, the one end of electric core is equipped with anodal utmost point ear, the other end of electric core is equipped with negative pole utmost point ear, anodal electrically conductive shell fragment one end with anodal electrically conductive piece is connected, anodal electrically conductive shell fragment the other end with anodal utmost point ear is connected, the electrically conductive shell fragment of negative pole one end with the electrically conductive piece of negative pole is connected, the electrically conductive shell fragment of.

Preferably, the housing is provided with an opening, and the positive conductive member is used for closing the opening.

Preferably, the opening is provided with a curled edge, and an edge of the positive electrode conductive member extends into the curled edge.

Preferably, the button cell further comprises a center needle, and the battery core is arranged on the periphery of the center needle.

As preferred, electric core includes positive pole piece, negative pole piece and sets up the diaphragm between positive pole piece and negative pole piece, electric core is formed by positive pole piece, diaphragm and the coiling of negative pole piece, positive pole utmost point ear is located positive pole piece and the diaphragm protrusion after coiling relatively, negative pole utmost point ear is located negative pole piece and the diaphragm protrusion after coiling relatively, the direction of protrusion of positive pole utmost point ear with the direction of protrusion of negative pole utmost point ear is different.

Preferably, the positive pole piece, the diaphragm and the negative pole piece are stacked in sequence from bottom to top.

Preferably, the separator is located between an end of the positive electrode tab and an end of the negative electrode tab.

Preferably, the positive conductive piece and the positive conductive elastic piece are integrally formed.

The utility model has the advantages that: the positive electrode lug is connected with the positive conductive piece through the positive conductive elastic piece, and the negative electrode lug is connected with the negative conductive piece through the negative conductive elastic piece, so that welding is avoided, and the effects of simplifying the battery assembly process and improving the battery assembly efficiency are achieved.

Drawings

Fig. 1 is an internal structure diagram of the present invention.

Fig. 2 is a schematic structural diagram of a battery cell according to some embodiments of the present invention.

Fig. 3 is a schematic structural diagram of the positive electrode plate, the negative electrode plate and the separator according to some embodiments of the present invention.

Fig. 4 is a schematic structural diagram of a battery cell according to another embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a positive electrode plate, a negative electrode plate and a separator according to another embodiment of the present invention.

The reference signs are: 1. a housing; 11. curling; 2. a positive conductive elastic sheet; 3. a negative conductive elastic sheet; 4. a positive electrode conductive member; 5. an electric core; 51. a positive electrode tab; 52. a negative electrode tab; 53. a positive electrode plate; 54. a negative pole piece; 55. a diaphragm; 6. a negative electrode conductive member; 7. a central needle.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, 2 and 4, a button cell includes a housing 1, a positive conductive elastic sheet 2, a negative conductive elastic sheet 3, a positive conductive piece 4, and a cell 5 disposed inside the housing 1, where the housing 1 is provided with the negative conductive piece 6, the positive conductive piece 4 is connected to the housing 1, one end of the cell 5 is provided with a positive tab 51, the other end of the cell 5 is provided with a negative tab 52, one end of the positive conductive elastic sheet 2 is connected to the positive conductive piece 4, the other end of the positive conductive elastic sheet 2 is connected to the positive tab 51, one end of the negative conductive elastic sheet 3 is connected to the negative conductive piece 6, and the other end of the negative conductive elastic sheet 3 is connected to the negative tab 52.

During the assembly, put into shell 1 with the electrically conductive shell fragment of negative pole 3 and electric core 5 for the electrically conductive shell fragment of negative pole 3 of conflicting respectively is made to electrically conductive 6 of negative pole utmost point ear 52 and negative pole, thereby realizes switching on between electrically conductive 6 of negative pole utmost point ear 52 and negative pole. Then, the positive conductive elastic sheet 2 and the positive conductive piece 4 are installed, and the positive conductive piece 4 is connected with the shell 1, so that the positive tab 51 and the positive conductive piece 4 both abut against the positive conductive elastic sheet 2, and conduction between the positive tab 51 and the positive conductive piece 4 is realized. Because the negative pole conductive elastic piece 3 has certain elasticity, certain pressure can be applied to the negative pole tab 52 and the negative pole conductive piece 6, so that the negative pole tab 52 and the negative pole conductive elastic piece 3 as well as the negative pole conductive piece 6 and the negative pole conductive elastic piece 3 can be stably connected, and stable conduction between the negative pole tab 52 and the negative pole conductive piece 6 is realized. The principle of the positive conductive elastic sheet 2 is the same as that of the negative conductive elastic sheet 3. When assembling the battery, the welding is not needed, and the effects of simplifying the battery assembling process and improving the battery assembling efficiency are effectively achieved.

As shown in fig. 1, the housing 1 is provided with an opening, and the positive conductive member 4 is used to close the opening without using other components for sealing.

As shown in fig. 1, the opening is provided with a bead 11, and the edge of the positive electrode conductive member 4 protrudes into the bead 11. After the positive conductive member 4 is covered on the opening, the crimping 11 is rolled up to realize stable connection between the positive conductive member 4 and the case 1.

As shown in fig. 1, 2 and 4, the button battery further includes a central needle 7, and the battery cell 5 is disposed on the periphery of the central needle 7, so as to improve the supporting capability of the battery cell 5 and prevent the battery cell 5 from collapsing.

As shown in fig. 2 to 5, the battery cell 5 includes a positive electrode sheet 53, a negative electrode sheet 54, and a separator 55 disposed between the positive electrode sheet 53 and the negative electrode sheet 54, so as to prevent the positive electrode sheet 53 from contacting the negative electrode sheet 54. Electric core 5 is formed by coiling positive pole piece 53, diaphragm 55 and negative pole piece 54, positive pole utmost point ear 51 is located positive pole piece 53 and the diaphragm 55 protrusion after coiling relatively, negative pole utmost point ear 52 is located negative pole piece 54 and the diaphragm 55 protrusion after coiling relatively, positive pole utmost point ear 51's salient direction with negative pole utmost point ear 52's salient direction is different to prevent that negative pole utmost point ear 52 mistake from bumping anodal electrically conductive shell fragment 2 or positive pole utmost point ear 51 mistake from bumping electrically conductive shell fragment 3 of negative pole.

In some embodiments, as shown in fig. 3, the positive electrode sheet 53, the separator 55 and the negative electrode sheet 54 are stacked in sequence from bottom to top. At this time, it is preferable that the longitudinal direction of the positive electrode sheet 53, the longitudinal direction of the separator 55, and the longitudinal direction of the negative electrode sheet 54 are the same, and the battery cell 5 is wound along the longitudinal direction of the positive electrode sheet 53, the longitudinal direction of the separator 55, and the longitudinal direction of the negative electrode sheet 54.

In some embodiments, the separator 55 is located between the ends of the positive pole piece 53 and the negative pole piece 54, as shown in fig. 5. In winding, winding is started from the end of the negative electrode tab 54 away from the positive electrode tab 53 to the end of the positive electrode tab 53 away from the negative electrode tab 54. In this embodiment, the length of the separator 55 needs to be long enough to cover the outer periphery of the rolled negative electrode tab 54 to prevent the positive electrode tab 53 from contacting the negative electrode tab 54.

Preferably, the positive conductive piece 4 and the positive conductive elastic piece 2 are integrally formed, so that a worker can assemble the positive conductive elastic piece 2 while assembling the positive conductive piece 4, thereby further improving the assembly efficiency.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention is disclosed in the preferred embodiment, it is not limited to the above description, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, but all the technical solutions of the present invention are within the scope of the present invention.

Claims

1. A button cell is characterized in that: including shell, anodal electrically conductive shell fragment, the electrically conductive shell fragment of negative pole, anodal electrically conductive piece and set up the electric core inside the shell, the shell is equipped with the electrically conductive piece of negative pole, anodal electrically conductive piece is connected with the shell, the one end of electric core is equipped with anodal utmost point ear, the other end of electric core is equipped with negative pole utmost point ear, anodal electrically conductive shell fragment's one end with anodal electrically conductive piece is connected, anodal electrically conductive shell fragment's the other end with anodal utmost point ear is connected, the electrically conductive shell fragment's of negative pole one end with the electrically conductive piece of negative pole is connected, the electrically conductive shell.

2. A button cell according to claim 1, wherein: the shell is provided with an opening, and the positive conductive piece is used for sealing the opening.

3. A button cell according to claim 2, wherein: the opening is provided with a curled edge, and the edge of the anode conductive piece extends into the curled edge.

4. A button cell according to claim 1, wherein: the button cell further comprises a center needle, and the battery cell is arranged on the periphery of the center needle at the center needle.

5. A button cell according to claim 1, wherein: the battery cell comprises a positive pole piece, a negative pole piece and a diaphragm arranged between the positive pole piece and the negative pole piece, the battery cell is formed by winding the positive pole piece, the diaphragm and the negative pole piece, the positive pole lug is located in the positive pole piece and protrudes relative to the diaphragm after winding, the negative pole lug is located in the negative pole piece and protrudes relative to the diaphragm after winding, and the protrusion direction of the positive pole lug is different from that of the negative pole lug.

6. A button cell according to claim 5, wherein: the positive pole piece, the diaphragm and the negative pole piece are stacked in sequence from bottom to top.

7. A button cell according to claim 5, wherein: the diaphragm is positioned between the end part of the positive pole piece and the end part of the negative pole piece.

8. A button cell according to claim 1, wherein: the positive conductive piece and the positive conductive elastic piece are integrally formed.