CN212380479U

CN212380479U - Button type lithium battery

Info

Publication number: CN212380479U
Application number: CN202021978701.XU
Authority: CN
Inventors: 胡常青; 赵明; 罗强
Original assignee: Zhuhai Hange Energy Tech Co ltd
Current assignee: Zhuhai Hange Energy Tech Co ltd
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2021-01-19
Anticipated expiration: 2030-09-10

Abstract

The utility model relates to a lithium cell preparation technical field especially relates to a button lithium cell, the utility model discloses a button lithium cell includes: the device comprises a shell, a first fixing device and a second fixing device, wherein the shell is provided with a cavity with an open top, and a first through mounting hole is formed in the inner wall of the shell; the battery cell is accommodated in the cavity; the first pole plate is provided with a first connecting end, and the first connecting end penetrates through the first mounting hole; a second polar plate having a second connection end; the cover plate is covered on the shell and provided with a second mounting hole, and the second connecting end penetrates through the second mounting hole; the utility model discloses a knot formula lithium cell adopts first polar plate to connect the first utmost point ear of electric core, adopts the second utmost point ear of second polar plate connection electric core to first link on the first polar plate is worn out from first mounting hole, and the second link on the second polar plate is worn out from the second mounting hole, has the advantage that simple structure, the inside space utilization of casing are big.

Description

Button type lithium battery

Technical Field

The utility model relates to a lithium cell preparation technical field especially relates to a knot formula lithium cell.

Background

Lithium batteries are a type of battery using a nonaqueous electrolyte solution with lithium metal or a lithium alloy as a negative electrode material. Because the chemical characteristics of lithium metal are very active, the requirements on the environment for processing, storing and using the lithium metal are very high, along with the development of scientific technology, the lithium battery becomes the mainstream at present, and the lithium battery can be roughly divided into two types: lithium metal batteries and lithium ion batteries, the lithium ion batteries do not contain metallic lithium and can be charged, the fifth generation product of rechargeable batteries, namely the lithium metal batteries, is produced in 1996, and the safety, specific capacity, self-discharge rate and cost performance ratio of the rechargeable batteries are superior to those of the lithium ion batteries; most of the existing button lithium batteries adopt bayonet structure design, and the design structure is complex and reduces the space utilization rate inside the shell.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a button type lithium battery, which has the advantages of simple structure and large space utilization rate inside a shell.

The utility model provides a technical scheme that its technical problem adopted does: a lithium button cell comprising: the device comprises a shell, a first fixing device and a second fixing device, wherein the shell is provided with a cavity with an open top, and a first through mounting hole is formed in the inner wall of the shell; the battery cell is accommodated in the cavity; the first pole plate is provided with a first connecting end, the first pole plate is arranged in the cavity and is connected with a first lug of the battery cell, and the first connecting end penetrates through the first mounting hole; the second polar plate is provided with a second connecting end, is arranged at the upper end of the battery cell and is connected with the second polar lug of the battery cell; the cover plate covers the shell and is provided with a second mounting hole, and the second connecting end penetrates through the second mounting hole.

Further, the first mounting hole is provided at the bottom of the housing.

Further, the first connection end protrudes from the first mounting hole and/or the second connection end protrudes from the second mounting hole.

Further, the housing and/or the cover plate are made of steel or aluminum.

Further, an insulating glue is arranged between the first polar plate and the shell.

Furthermore, an insulating glue is arranged between the second polar plate and the cover plate.

Furthermore, the first mounting hole and/or the second mounting hole are circular holes, and insulating glue is arranged between the first connecting end and the first mounting hole and between the second connecting end and the second mounting hole.

Further, the first connecting end and the first pole plate are integrally formed and/or the second connecting end and the second pole plate are integrally formed and arranged.

Further, the first pole plate and the first pole lug are fixed in a welding mode and/or the second pole plate and the second pole lug are fixed in a welding mode.

The beneficial effects of the utility model are that: the utility model discloses a knot formula lithium cell adopts first polar plate to connect the first utmost point ear of electric core, adopts the second utmost point ear of second polar plate connection electric core to first link on the first polar plate is worn out from first mounting hole, and the second link on the second polar plate is worn out from the second mounting hole, has the advantage that simple structure, the inside space utilization of casing are big.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an assembly schematic diagram of a button lithium battery according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a button lithium battery according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1 and 2, the lithium button cell includes a casing 100, a cell 200, a first plate 300, a second plate 400 and a cover plate 500, wherein the casing 100 has a cavity with an open top, a through first mounting hole 101 is formed on an inner wall of the casing 100, the first plate 300 has a first connection end 301, the first plate 300 and the cell 200 are sequentially disposed in the cavity, a first tab 201 of the cell 200 is connected with the first plate 300 to form electrical conduction, the first connection end 301 protrudes from the first mounting hole 101, the second plate 400 is disposed at an upper end of the cell 200 and is connected with a second tab 202 of the cell 200 to form electrical conduction, the second plate 400 is provided with a second connection end 401, the cover plate 500 is provided with a second mounting hole 500, the cover plate 500 is covered on the top of the casing 100 to enclose the first plate 300, the cell 200 and the second plate 400 in the cavity, and the second connection end 401 passes out of the second mounting hole 500; it should be noted that, the button lithium battery of the present invention may be a cylindrical lithium battery or a square battery, and the first mounting hole 101 and the second mounting hole 500 may be circular holes or square holes, and the first connecting end 301 is circular or square protruding from the end surface of the first polar plate 300, the second connecting end 401 is circular or square protruding from the end surface of the second polar plate 400, and the first connecting end 301 and the first mounting hole 101 and the second connecting end 401 and the second mounting hole 500 are in clearance fit, it should be noted that, in this embodiment, the first tab 201 of the electrical core 200 is specified as a negative electrode, and the second tab 202 is a positive electrode; the utility model discloses a knot formula lithium cell need not to be provided with the bayonet socket on casing 100, has simple structure, the big advantage of space utilization of cavity.

In some embodiments, the first mounting hole 101 is disposed at the bottom of the casing 100, the first plate 300 is also disposed at the bottom of the casing 100, and the first connection end 301 protrudes out of the first mounting hole 101, the lithium button cell of this embodiment is suitable for a case where electrodes are separately disposed at two opposite ends of the battery cell 200, of course, the first mounting hole 101 may also be disposed at a side surface of the casing 100, that is, the position where the first mounting hole 101 is disposed on the casing 100 may be determined according to a manner of leading out the electrodes on the battery cell 200.

In some embodiments, referring to fig. 1 and 2, the first connection end 301 protrudes from the first installation hole 101 and/or the second connection end 401 protrudes from the second installation hole 500, so that the first tab 201 and the second tab 202 of the battery cell 200 respectively protrude from the outer surface of the casing 100, thereby facilitating the electrical connection of the lithium button cell with an external structure, and in this embodiment, the first connection end 301 is recessed in the first installation hole 101, and the second connection end 401 protrudes from the second installation hole 500, so that the positive electrode and the negative electrode of the lithium button cell can be easily distinguished by a user, and the first connection end 301 is recessed from the bottom of the casing 100 or is flush with the bottom of the casing 100, thereby ensuring that the lithium button cell can be laid on a horizontal plane, and facilitating storage, packaging and use.

In some embodiments, referring to fig. 2, an insulating adhesive 600 is disposed between the first pole plate 300 and the case 100, and an insulating adhesive 600 is disposed between the second pole plate 400 and the cover plate 500, specifically, the insulating adhesive 600 can ensure the insulating performance between the first pole plate 300, the second pole plate 400 and the case 100, and the cover plate 500 is bonded to the upper end of the case 100 by using the insulating adhesive 600, so that the assembly method is simple in process and effectively reduces the production cost; in other embodiments, the insulating glue 600 is further coated on the inner walls of the first mounting hole 101 and the second mounting hole 500, so as to prevent the cell 200 from being damaged due to shaking of the first polar plate 300 and the second polar plate 400 in the cavity after assembly.

In some embodiments, the first electrode plate 300 and the second electrode plate 400 can be made of a conductive material, such as copper, aluminum, etc., and the first connection end 301 is integrally formed with the first electrode plate 300, and the second connection end 401 is integrally formed with the second electrode plate 400.

In some embodiments, the first tab 201 and the second tab 202 on the battery cell 200 are both made of elastic metal materials, and when the battery cell is mounted, the battery cell 200 can be fixed in the cavity by the elastic force between the first tab 201 and the first polar plate 300 and the elastic force between the second tab 202 and the second polar plate 400, so that the assembly is convenient by adopting such a structure, and the assembly efficiency is improved; in other embodiments, the first electrode plate 300 may be welded to the first tab 201, and the second electrode plate 400 may be welded to the second tab 202, so as to ensure the stability of electrical conduction between the first tab 201 and the first electrode plate 300 and the stability of electrical conduction between the second tab 202 and the second electrode plate 400.

It should be noted that, in all the above embodiments, the casing 100 and the cover plate 500 may be made of hard metal or alloy, such as steel or aluminum alloy, and the insulating glue 600 is disposed between the casing 100 and the cover plate 500 made of hard metal and the first pole plate 300 and the second pole plate 400, so as to avoid the problem of short circuit; insulating glue 600 is arranged between the first connecting end 301 and the first mounting hole 101 in clearance fit, and between the second connecting end 401 and the second mounting hole 501; in an emergency, the cavity of the housing 100 generates gas to cause the pressure in the cavity to be too high, the insulating glue 600 can expand to form a gap, the gas in the cavity can be released from the gap, explosion is prevented, and the safety of the button lithium battery is improved.

In other embodiments, the casing 100 and the cover plate 500 may also be made of an insulating material, such as high temperature resistant plastic or ceramic, in order to lead out the first connection end 301 and the second connection end 401 of the two electrodes of the battery cell 200, thereby improving the insulating performance of the lithium button cell.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. A lithium button cell comprising:

the device comprises a shell, a first fixing device and a second fixing device, wherein the shell is provided with a cavity with an open top, and a first through mounting hole is formed in the inner wall of the shell;

the battery cell is accommodated in the cavity;

the first pole plate is provided with a first connecting end, the first pole plate is arranged in the cavity and is connected with a first lug of the battery cell, and the first connecting end penetrates through the first mounting hole;

the second polar plate is provided with a second connecting end, is arranged at the upper end of the battery cell and is connected with the second polar lug of the battery cell;

the cover plate covers the shell and is provided with a second mounting hole, and the second connecting end penetrates through the second mounting hole.

2. A lithium button cell according to claim 1, wherein said first mounting hole is formed in the bottom of said case.

3. A lithium button cell according to claim 1 or 2, characterized in that the first connecting end protrudes from the first mounting hole and/or the second connecting end protrudes from the second mounting hole.

4. A lithium button cell battery as in claim 1, wherein said casing and/or said cover plate are made of steel or aluminum.

5. A lithium button cell according to claim 4, characterized in that an insulating glue is provided between the first plate and the casing.

6. The lithium button cell as recited in claim 4, wherein an insulating glue is disposed between the second plate and the cover plate.

7. The button lithium battery as claimed in claim 1, wherein the first mounting hole and/or the second mounting hole are circular holes, and an insulating adhesive is disposed between the first connecting end and the first mounting hole and between the second connecting end and the second mounting hole.

8. A lithium button cell according to claim 1, characterized in that said first connecting end is integrally formed with said first plate and/or said second connecting end is integrally formed with said second plate.

9. The lithium button cell battery as recited in claim 1, wherein the first plate is welded to the first tab and/or the second plate is welded to the second tab.