CN215451491U - Lithium ion battery cell - Google Patents
Lithium ion battery cell Download PDFInfo
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- CN215451491U CN215451491U CN202023267835.3U CN202023267835U CN215451491U CN 215451491 U CN215451491 U CN 215451491U CN 202023267835 U CN202023267835 U CN 202023267835U CN 215451491 U CN215451491 U CN 215451491U
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- tab
- temperature fuse
- lithium ion
- temperature
- battery cell
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model relates to the technical field of lithium ion batteries, in particular to a lithium ion battery cell which comprises a cell body, a temperature fuse, a first lug and a second lug, wherein one end of the first lug is electrically connected with a pole piece of the cell body, the other end of the first lug is electrically connected with one end of the temperature fuse, the other end of the temperature fuse is electrically connected with one end of the second lug, and a temperature sensing surface of the temperature fuse is in contact with the first lug. Compared with the prior art, the heat conducting sheet is omitted, and the temperature sensing surface of the temperature fuse is in contact with the first electrode lug, so that the temperature fuse can sense the temperature quickly, the temperature fuse can respond quickly, and the safety of the lithium ion battery cell is improved.
Description
Technical Field
The utility model relates to the technical field of lithium ion batteries, in particular to a lithium ion battery cell.
Background
Electric energy is used in large scale in society beginning in the nineteenth century, and nowadays, electric energy enters thousands of households. As modern times develop wired power supplies that have not met today's changing lifestyles, mobile power supplies have become of particular importance. Currently, lithium ion batteries have been widely used in different scenes due to many advantages. However, various problems are faced in the process of using lithium ions, and in the case of Overcharge (Overcharge), the Overcharge easily causes the electrolyte in the lithium ion battery to decompose and release gas, so that the battery swells and generates a large amount of heat, and in the serious case, the battery even generates smoke and fire, thereby causing accidents. Today, solutions fall into two categories: firstly, materials with better stability are used by changing a material system or additives are added. And secondly, a temperature fuse (TCO) is added in the circuit, and the circuit is cut off instantly by sensing high temperature, so that the aim of protecting the safety of the battery is fulfilled. The first approach, while fundamentally solving the problem, has reached the bottleneck of the current technology. The fastest solution is to add TCO to the external circuit to protect the circuit.
The TCO that uses at present mainly is through the secondary welding to anodal utmost point ear, then through double faced adhesive tape or heat conduction glue splice electric core main part (generally for the top seal region), when electric core overcharge produced the great amount of heat, the heat passes to electric core surface from electric core inside earlier, and electric core surface transmits for TCO through double faced adhesive tape or heat conduction glue, detects the temperature and surpasses the back when the upper limit, will cut off the power supply, guarantees that electric core is in safe state, but the heat transfer has a time difference to cause main part temperature and TCO temperature inconsistent. Patent application No. CN201120257857.3 is bonded to a body by using an adhesive layer having a thermal conductivity > 0.8W/mK. The method reduces the temperature difference between the main body and the TCO, but cannot eliminate the temperature difference, and the possibility still exists that the temperature of the cell exceeds a safety value, but the temperature of the TCO does not reach an upper limit temperature, the power failure is not timely, and potential safety hazards exist.
Some people also solve the problem of untimely heat transfer by adding a heat conducting sheet, for example, the patent with the application number of 201420457391.5 directly adds a heat conducting sheet inside to connect with the TCO, but this will increase the production process cost, and there is a certain potential safety hazard in the heat conducting sheet implanted inside. The patent No. 201520587050.4 achieves the purpose of rapid heat transfer by directly welding the heat conducting sheet to the TCO on the tab. The addition of the heat conductive sheet also increases the process cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a lithium ion battery cell which does not need to be added with a heat conducting sheet and can quickly transfer heat to a temperature fuse.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a lithium ion cell, includes electric core body, temperature fuse, first utmost point ear and second utmost point ear, the one end of first utmost point ear with the pole piece electric connection of electric core body, the other end of first utmost point ear with the one end electric connection of temperature fuse, the other end of temperature fuse with the one end electric connection of second utmost point ear, the temperature response face of temperature fuse with first utmost point ear contact.
Preferably, the pole piece of the battery cell body is welded with one end of the first tab, the other end of the first tab is welded with one end of the temperature fuse, and the other end of the temperature fuse is welded with one end of the second tab.
Preferably, the temperature fuse is fixed on a top cover of the battery cell body.
Preferably, the first tab is an aluminum sheet.
Preferably, the first tab is a nickel sheet.
Preferably, the second tab is an aluminum sheet.
Preferably, the second tab is a nickel sheet.
The utility model has at least the following beneficial effects: when a large amount of heat is generated inside the battery core, the heat is transmitted to the first lug through the pole piece, the heat is transmitted to the temperature fuse by the first lug, and when a certain temperature is reached, the temperature fuse cuts off a loop, so that the purpose of protecting the safety of the battery is achieved. Compared with the prior art, the heat conducting sheet is omitted, and the temperature sensing surface of the temperature fuse is in contact with the first electrode lug, so that the temperature fuse can sense the temperature quickly, the temperature fuse can respond quickly, and the safety of the lithium ion battery cell is improved.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to substantially achieve the technical result.
The present invention will be described in further detail below with reference to the accompanying drawings, but the present invention is not limited thereto.
The first embodiment is as follows:
as shown in fig. 1, a lithium ion battery cell includes a battery cell body (not shown), a temperature fuse 3, a first tab 1 and a second tab 4, one end of the first tab 1 is electrically connected to a pole piece of the battery cell body, the other end of the first tab 1 is electrically connected to one end of the temperature fuse 3, the other end of the temperature fuse 3 is electrically connected to one end of the second tab 4, and a temperature sensing surface of the temperature fuse 3 contacts with the first tab 1.
The working principle of the utility model is as follows: when a large amount of heat is generated in the battery core, the heat is transmitted to the first tab 1 through the pole piece, the first tab 1 transmits the heat to the temperature fuse 3, and when a certain temperature is reached, the temperature fuse 3 cuts off a loop, so that the purpose of protecting the safety of the battery is achieved. Compared with the prior art, the heat conducting sheet is omitted, and the temperature sensing surface of the temperature fuse is in contact with the first electrode lug, so that the temperature fuse can sense the temperature quickly, the temperature fuse can respond quickly, and the safety of the lithium ion battery cell is improved.
Example two:
as shown in fig. 2, compared with the first embodiment, the difference is that a first tab 1 is welded at one end of the thermal fuse 3, the first tab 1 is an aluminum sheet or a nickel sheet, the length of the first tab 1 is 1mm-100mm, the width of the first tab 1 is 2mm-15mm, and the thickness of the first tab is 0.0.05mm-2.0 mm. The first tab 1 is reserved with tab glue 2, the thickness of the tab glue 2 is 0.05mm-2mm, the shoulder width of the tab glue 2 is 1-10mm, the length of the tab glue 2 is 1mm-10mm, and the distance between the tab glue 2 and the temperature fuse 3 is 0-20 mm. The other end of the temperature fuse 3 is welded with a second lug 4, the second lug 4 is an aluminum sheet or a nickel sheet, the length of the second lug 4 is 1mm-100mm, the width of the second lug 4 is 2mm-15mm, the thickness of the second lug is 0.05mm-2.0mm, and the temperature fuse 3 is fixed on the top sealing surface 5 of the electric core body 6.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the utility model as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (7)
1. A lithium ion battery cell is characterized by comprising a cell body, a temperature fuse, a first tab and a second tab, wherein one end of the first tab is electrically connected with a pole piece of the cell body, the other end of the first tab is electrically connected with one end of the temperature fuse, the other end of the temperature fuse is electrically connected with one end of the second tab, and a temperature sensing surface of the temperature fuse is in contact with the first tab; and a tab glue is reserved on the first tab, and the distance between the tab glue and the temperature fuse is 0-20 mm.
2. The lithium ion battery cell of claim 1, wherein the pole piece of the cell body is welded to one end of the first tab, the other end of the first tab is welded to one end of the temperature fuse, and the other end of the temperature fuse is welded to one end of the second tab.
3. The lithium ion battery cell of claim 1, wherein the thermal fuse is fixed on a top cover of the cell body.
4. The lithium ion battery cell of any one of claims 1 to 3, wherein the first tab is an aluminum sheet.
5. The lithium ion battery cell of any one of claims 1 to 3, wherein the first tab is a nickel sheet.
6. The lithium ion battery cell according to any one of claims 1 to 3, wherein the second tab is an aluminum sheet.
7. The lithium ion battery cell according to any one of claims 1 to 3, wherein the second tab is a nickel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023267835.3U CN215451491U (en) | 2020-12-30 | 2020-12-30 | Lithium ion battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023267835.3U CN215451491U (en) | 2020-12-30 | 2020-12-30 | Lithium ion battery cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215451491U true CN215451491U (en) | 2022-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023267835.3U Active CN215451491U (en) | 2020-12-30 | 2020-12-30 | Lithium ion battery cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215451491U (en) |
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2020
- 2020-12-30 CN CN202023267835.3U patent/CN215451491U/en active Active
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