CN210200857U - Lithium battery top cover - Google Patents
Lithium battery top cover Download PDFInfo
- Publication number
- CN210200857U CN210200857U CN201920913527.1U CN201920913527U CN210200857U CN 210200857 U CN210200857 U CN 210200857U CN 201920913527 U CN201920913527 U CN 201920913527U CN 210200857 U CN210200857 U CN 210200857U
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- China
- Prior art keywords
- explosion
- lithium cell
- proof piece
- thermistor
- shell
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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
Abstract
The utility model belongs to the technical field of the battery, concretely relates to lithium cell top cap, including the shell, top-down is equipped with orifice plate, little insulating ring, explosion-proof piece, big insulating ring, bimetallic strip, thermistor and the conducting strip that links to each other in proper order in the shell. The orifice plate passes through the solder joint and the explosion-proof piece is connected, when the temperature increased to the predetermined temperature in the lithium cell, positive temperature coefficient thermistor (PTC) resistance value increased no longer electrically conducts, the electric current is interrupted between conducting strip and explosion-proof piece, bimetallic strip takes place physical deformation when reaching certain temperature in addition and backs down positive temperature coefficient thermistor (PTC), also can make the electric current interrupted between conducting strip and explosion-proof piece, like this can duplicate protection, and then eliminate the lithium cell at the charge-discharge in-process inside high temperature and cause the hidden danger of battery explosion, it is safer to use.
Description
Technical Field
The utility model belongs to the technical field of the battery, concretely relates to lithium battery top cap.
Background
In the prior art, lithium batteries are a type of battery using a nonaqueous electrolyte solution, in which lithium metal or a lithium alloy is used as a negative electrode material. With the development of science and technology, lithium batteries have become the mainstream nowadays. The main problem that exists in the lithium cell among the prior art is that during the lithium cell is discharging, there is the current too big and leads to the inside high temperature of battery and arouse the hidden danger of battery explosion, causes the unsafe condition of using.
Therefore, a lithium battery top cap capable of solving the above problems is required.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem, the utility model provides a lithium battery top cap, in this structure, utilize the bimetallic strip can take place physics deformation when the temperature is high more, open positive temperature coefficient thermistor in the top, thereby cut off lithium cell current return circuit, utilize positive temperature coefficient thermistor value to increase the high not theory of operation that does not conduct when the temperature is high more in addition, when the temperature that positive temperature coefficient thermistor experienced in the lithium cell reaches predetermined control temperature, it just can no longer be electrically conductive, thereby cut off lithium cell current return circuit, bimetallic strip and positive temperature coefficient thermistor mutually support and play duplicate protection.
The utility model discloses a realize through following technical scheme: a top cover of a lithium battery comprises a shell made of insulating materials, wherein an annular convex rib is arranged on the upper portion of the inner wall of the shell, and a pore plate, a small insulating ring, an explosion-proof sheet, a large insulating ring, a bimetallic strip, a thermistor and a conducting strip which are connected with each other are sequentially arranged in the shell from top to bottom. The pore plate is connected with the explosion-proof sheet through the welding spot, and under the normal condition, current can circulate among the pore plate, the explosion-proof sheet, the positive temperature coefficient thermistor and the conducting sheet. When the temperature increases to the predetermined temperature in the lithium cell, positive temperature coefficient thermistor (PTC) resistance value increases and is no longer electrically conductive, and the electric current is interrupted between top cap and explosion-proof piece, and bimetallic strip can take place physics deformation when the temperature is higher in addition, backs down positive temperature coefficient thermistor to cut off lithium cell current return circuit, and then eliminate the lithium cell at the inside high temperature of charge-discharge in-process and cause the hidden danger of battery explosion, play duplicate protection, use safelyr.
Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has: be equipped with positive temperature coefficient thermistor (PTC), when the temperature increased to the predetermined temperature in the lithium cell, positive temperature coefficient thermistor (PTC) resistance value increased no longer electrically conductive, the electric current was interrupted between top cap and explosion-proof piece, bimetallic strip can take place physical deformation when the temperature is higher in addition, push up positive temperature coefficient thermistor, thereby cut off lithium cell current return circuit, and then eliminate the lithium cell at the charge-discharge in-process inside high temperature and cause the hidden danger of battery explosion, play duplicate protection, it is safer to use.
Drawings
Fig. 1 is a schematic view of the cross-sectional structure of the present invention.
Fig. 2 is an exploded schematic view of the present invention.
Fig. 3 is a schematic view of the structure of the conductive sheet of the present invention.
Wherein: 1. a housing; 2. an orifice plate; 3. a small insulating ring; 4. a small insulating ring; 5. a thermistor; 6. a bimetal; 7. a large insulating ring; 8. and (4) conducting strips.
Detailed Description
As shown in fig. 1, 2 and 3, the battery comprises a shell 1 made of an insulating material, a pore plate 2, a small insulating ring 3, an explosion-proof sheet 4, a large insulating ring 7, a bimetallic strip 6, a thermistor 5 and a conducting strip 8 connected with a battery chamber are sequentially arranged in the shell from top to bottom, the pore plate 2 is connected with the explosion-proof sheet 4 through a welding spot, and under normal conditions, current can circulate among the pore plate 2, the explosion-proof sheet 4, the positive temperature coefficient thermistor 5 and the conducting strip 8. When the temperature in the lithium battery is increased, the connecting welding points between the pore plate 2 and the explosion-proof sheet 4 are disconnected, and the current is interrupted between the pore plate 2 and the explosion-proof sheet 4; when the temperature increases to the predetermined temperature in the lithium cell, positive temperature coefficient thermistor (PTC)5 resistance value increases and is no longer electrically conductive, and the electric current is interrupted between conducting strip 8 and explosion-proof piece 4, and bimetallic strip 6 can take place physical deformation when the temperature is higher in addition, backs down positive temperature coefficient thermistor 5 to cut off lithium cell current loop, and then eliminate the lithium cell and charge and discharge the inside high temperature of in-process and cause the hidden danger of battery explosion, use safelyr.
Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has: firstly, be equipped with positive temperature coefficient thermistor (PTC)5, when the temperature increased to the predetermined temperature in the lithium cell, positive temperature coefficient thermistor (PTC) resistance value increased no longer electrically conductive, and the electric current is interrupted between conducting strip 8 and explosion-proof piece 4, and then eliminates the lithium cell at the charge-discharge in-process inside high temperature and cause the hidden danger of battery explosion, uses safelyr.
The structure, features and effects of the present invention have been described in detail above according to the embodiment shown in the drawings, and the above is only the preferred embodiment of the present invention, but the present invention does not limit the implementation scope as shown in the drawings, and all other embodiments obtained by a person skilled in the art without creative work shall belong to the protection scope of the present invention.
Claims (4)
1. The utility model provides a lithium cell top cap which characterized in that: the explosion-proof thermal resistor comprises a shell made of insulating materials, wherein an annular convex rib is arranged on the upper part of the inner wall of the shell, and a pore plate, a small insulating ring, an explosion-proof sheet, a large insulating ring, a bimetallic strip, a thermistor and a conducting sheet which are connected with each other are sequentially arranged in the shell from top to bottom.
2. A lithium battery cell cap as in claim 1, wherein: the pore plate is connected with the explosion-proof sheet through welding points.
3. A lithium battery cell cap as in claim 1, wherein: the thermistor is a positive temperature coefficient thermistor.
4. A lithium battery cell cap as in claim 1, wherein: the conducting strip is provided with an annular convex rib.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920913527.1U CN210200857U (en) | 2019-06-18 | 2019-06-18 | Lithium battery top cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920913527.1U CN210200857U (en) | 2019-06-18 | 2019-06-18 | Lithium battery top cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210200857U true CN210200857U (en) | 2020-03-27 |
Family
ID=69871023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920913527.1U Active CN210200857U (en) | 2019-06-18 | 2019-06-18 | Lithium battery top cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210200857U (en) |
-
2019
- 2019-06-18 CN CN201920913527.1U patent/CN210200857U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |