CN211654941U - Improved safety and voltage hysteresis battery structure - Google Patents
Improved safety and voltage hysteresis battery structure Download PDFInfo
- Publication number
- CN211654941U CN211654941U CN201922356229.XU CN201922356229U CN211654941U CN 211654941 U CN211654941 U CN 211654941U CN 201922356229 U CN201922356229 U CN 201922356229U CN 211654941 U CN211654941 U CN 211654941U
- Authority
- CN
- China
- Prior art keywords
- current collector
- lithium
- negative
- positive
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Connection Of Batteries Or Terminals (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The utility model discloses an improve inferior battery structure of lithium of security and voltage lag relates to battery structure field. The battery cell is formed by winding a positive plate, a negative plate and a glass fiber diaphragm through a circular winding needle; the positive plate comprises a film, a positive current collector and a cover group; the negative plate comprises a lithium belt, a negative current collector and a connecting strip; the glass fiber diaphragm wraps the negative plate. The utility model discloses discharge current equilibrium more, the reaction is abundant, and security and electrical property have all obtained the improvement.
Description
Technical Field
The utility model relates to a battery structure field, the more specifically lithium subcell structure that it is one kind to improve security and voltage lag that says so.
Background
The lithium-ion battery is a battery with high specific energy in the current chemical power supply, has the advantages of high working voltage, long storage life, wide working temperature range, convenient use and maintenance, strong adaptability and the like, and has wide application in national economy represented by the national defense field in more than ten years.
With long-term use, the product of the lithium subcell is gradually exposed to some problems during the use process, such as lithium/thionyl chloride (Li/SOCl)2) And has the disadvantages of voltage lag, safety problems, etc.
In the traditional lithium sub-power battery structure, a positive plate current collector adopts a nickel mesh, a negative plate current collector adopts nickel strips or does not adopt nickel strips, and the positive and negative plates are finally rolled into a battery cell in a mechanical winding mode. A large number of experiments show that when the battery is in long-term high-rate or deep discharge, the reaction of the negative electrode lithium belt is not uniform, particularly the reaction of the lithium belt near the current collector nickel strip is most severe, and a large amount of deposited reactants can reduce the battery capacity and increase the voltage lag on one hand and bring about potential safety hazards on the other hand.
Therefore, there is a need to develop a lithium subcell structure that improves safety and voltage hysteresis.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the shortcomings of the background art, and providing a lithium sub-battery structure with improved safety and voltage hysteresis.
In order to realize the purpose, the technical scheme of the utility model is that: improve lithium subcell structure of security and voltage hysteresis, including battery case and the electric core that is located the battery case, its characterized in that: the battery cell is formed by winding a positive plate, a negative plate and a glass fiber diaphragm through a circular winding needle;
the positive plate comprises a film, a positive current collector positioned on the film, and a cover group, wherein one end of the cover group is connected with the positive current collector, and the other end of the cover group is positioned outside the film;
the negative plate comprises a lithium belt, a negative current collector positioned on the lithium belt, and a connecting strip, wherein one end of the connecting strip is connected with the negative current collector, and the other end of the connecting strip is positioned outside the lithium belt;
the glass fiber diaphragm wraps the negative plate.
In the above technical scheme, the positive plate comprises two films, the positive current collector is located between the two films, and the cover group is located at the head of the positive current collector.
In the technical scheme, the lithium belt is folded to be wrapped with the negative current collector, and the connecting strip is positioned at the head of the negative current collector.
In the technical scheme, the glass fiber diaphragm is folded in half and then wraps the negative plate.
In the technical scheme, the positive current collector and the negative current collector are both of a nickel expanded mesh structure, and meshes of the nickel expanded mesh structure are rhombic; the connecting strip is a nickel strap.
Compared with the prior art, the utility model has the advantages of it is following:
1) the positive current collector adopts a nickel net pulling structure, and compared with the traditional nickel hole net structure, the two films of the positive plate of the utility model are more easily rolled together, and the adhesive force of the circular mesh is better compared with the nickel hole net structure because the mesh of the nickel net pulling structure is rhombic;
2) the utility model discloses wrap up the negative pole mass flow body behind the fifty percent discount with the lithium area, compare in the tradition directly with the direct mechanical concora crush of negative pole mass flow body on the lithium area, the utility model discloses a better reliability, the negative pole mass flow body is difficult for droing.
3) The utility model discloses nickel draws the net structure to be big than traditional nickel bar structure area of contact on the lithium tape for each partial discharge current more balanced of pole piece, the reaction is abundant, and security and electrical property have all obtained the improvement.
Drawings
Fig. 1 is the structure schematic diagram of the positive plate of the present invention.
Fig. 2 is a schematic plan view of the negative plate of the present invention.
Fig. 3 is a schematic structural diagram of the negative plate and the glass fiber diaphragm of the present invention.
Fig. 4 is a schematic structural diagram of the positive plate, the negative plate, the glass fiber diaphragm and the circular winding needle of the present invention.
Fig. 5 is a battery performance test chart after the high-temperature storage of the battery according to the present invention and the conventional battery.
Fig. 6 is a battery performance test chart after the high-temperature storage of the battery according to the present invention and the conventional battery.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be apparent and readily appreciated by the description.
With reference to the accompanying drawings: improve lithium subcell structure of security and voltage hysteresis, including stainless steel battery case 1 and the drum electricity core 2 that is located battery case 1, its characterized in that: the battery core 2 is formed by winding a positive plate 3, a negative plate 4 and a glass fiber diaphragm 5 through a circular winding needle 6;
the positive plate 3 comprises a membrane 33, a positive current collector 31 positioned on the membrane 33, and a cover group 32, wherein one end of the cover group is vertically welded on the positive current collector 31 in a resistance welding mode, and the other end of the cover group is positioned outside the membrane 33;
the negative plate 4 comprises a lithium strip 41, a negative current collector 42 positioned on the lithium strip 41, and a connecting strip 43, one end of which is connected with the negative current collector 42 and the other end of which is positioned outside the lithium strip 41;
the glass fiber diaphragm 5 wraps the negative plate 4.
The positive plate 3 comprises two films 33, a positive current collector 31 is positioned between the two films 33, and a cover group 32 is positioned at the head of the positive current collector 31; the two films 33 are rolled with the positive current collector 31, wherein a certain length is reserved at the head of the positive current collector 31 for connecting the cover group 32
The lithium strip 41 is folded in half and then wraps the negative current collector 42, and the connecting strip 43 is located at the head of the negative current collector 42.
The glass fiber diaphragm 5 is folded in half and then wraps the negative plate 4.
The positive current collector 31 and the negative current collector 42 are both of a nickel mesh structure, and meshes of the nickel mesh structure are rhombic; the connecting strip 43 is a nickel strip.
A method of making a lithium subcell structure having improved safety and voltage hysteresis comprising the steps of:
step 1: firstly, mixing acetylene black and copper powder, polytetrafluoroethylene emulsion and isopropanol, then forming a film 33 after rolling and fiberizing, adopting a nickel mesh as a positive current collector 31 and a negative current collector 42, rolling two films 33 and the positive current collector 31 positioned between the two films 33 together, and welding a cover group 32 on the head of the positive current collector 31 in a resistance welding manner to finish the pretreatment of a positive plate 3;
step 2: the connecting strip 43 is spot-welded at the head of the negative current collector 42, the lithium strip 41 is folded in half and then covers the negative current collector 42, and the pretreatment of the negative plate 4 is completed;
and step 3: wrapping a negative plate 4 with a glass fiber diaphragm 5, then placing the wrapped negative plate 4 and a positive plate 3 on a circular winding needle 6, winding the positive plate 3 on the circular winding needle 6 for a circle, then placing the wrapped negative plate 4 until the positive plate 3 and the negative plate 4 are just finished, and finishing the manufacture of the cylindrical battery core 2;
and 4, step 4: and (2) placing the manufactured battery core 2 into the battery shell 1, packaging the cover group 32 and the battery shell 1 by adopting an argon arc welding process, testing the short circuit condition after packaging, vacuumizing, injecting a certain amount of electrolyte, standing in vacuum, and cleaning to finish the manufacturing process of the battery.
Fig. 6 is a battery performance test chart after the high-temperature storage of the battery and the traditional battery, the test method is to store for 4 days at 70 ℃, and then discharge with 0.2C, wherein 71 is the discharge curve of the traditional technology, and 72 is the discharge curve of the utility model.
Other parts not described belong to the prior art.
Claims (5)
1. Improve lithium subcell structure of security and voltage hysteresis, including battery case (1) and be located electric core (2) in battery case (1), its characterized in that: the battery core (2) is formed by winding a positive plate (3), a negative plate (4) and a glass fiber diaphragm (5) through a circular winding needle (6);
the positive plate (3) comprises a film (33), a positive current collector (31) positioned on the film (33), and a cover group (32) with one end connected with the positive current collector (31) and the other end positioned outside the film (33);
the negative plate (4) comprises a lithium belt (41), a negative current collector (42) positioned on the lithium belt (41), and a connecting strip (43) with one end connected with the negative current collector (42) and the other end positioned outside the lithium belt (41);
the glass fiber diaphragm (5) wraps the negative plate (4).
2. The improved safety and voltage hysteresis lithium subcell structure of claim 1, characterized in that: the positive plate (3) comprises two films (33), the positive current collector (31) is positioned between the two films (33), and the cover group (32) is positioned at the head of the positive current collector (31).
3. The improved safety and voltage hysteresis lithium subcell structure of claim 2, characterized in that: the lithium belt (41) is folded to be wrapped with the negative current collector (42), and the connecting strip (43) is located at the head of the negative current collector (42).
4. The improved safety and voltage hysteresis lithium subcell structure of claim 3, characterized in that: the glass fiber diaphragm (5) is folded in half and then wraps the negative plate (4).
5. The improved safety and voltage hysteresis lithium subcell structure of claim 3 or 4, characterized in that: the positive current collector (31) and the negative current collector (42) are both of a nickel pull net structure, and meshes of the nickel pull net structure are rhombic; the connecting strip (43) is a nickel strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922356229.XU CN211654941U (en) | 2019-12-25 | 2019-12-25 | Improved safety and voltage hysteresis battery structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922356229.XU CN211654941U (en) | 2019-12-25 | 2019-12-25 | Improved safety and voltage hysteresis battery structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211654941U true CN211654941U (en) | 2020-10-09 |
Family
ID=72698706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922356229.XU Active CN211654941U (en) | 2019-12-25 | 2019-12-25 | Improved safety and voltage hysteresis battery structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211654941U (en) |
-
2019
- 2019-12-25 CN CN201922356229.XU patent/CN211654941U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102683634B (en) | High-capacity cylindrical lithium ion cell and production method thereof | |
| CN103413975B (en) | Lithium nickel cobalt manganate cylindrical high-rate battery and preparation method thereof | |
| CN102637906B (en) | Preparation method of winding-structure lithium ion battery | |
| CN103035954B (en) | A kind of coiled lithium ion battery and preparation method thereof | |
| CN100517852C (en) | A coiling lithium ion battery and its making method | |
| CN202662698U (en) | Cylindrical lithium ion battery | |
| CN202549997U (en) | High-capacity cylindrical lithium ion battery | |
| CN101188310A (en) | A phosphate Fe, lithium and aluminum shell column battery and its making technology | |
| CN101626096A (en) | Method for producing lithium polymer rechargeable battery for low-temperature discharge and large-current discharge simultaneously | |
| CN102227031A (en) | Lithium ion battery with high-rate discharge characteristic | |
| CN103107372A (en) | Method for producing iron-nickel alkaline battery | |
| CN202050030U (en) | Lithium ion battery with high-multiplying-power discharge performance | |
| CN108878765A (en) | A kind of lithium ion cell electrode, lithium ion battery and preparation method of lithium ion battery | |
| CN104112846A (en) | High-capacity lithium-ion battery used for electric tool and preparation method thereof | |
| CN109378444A (en) | A kind of aluminium ion battery and its positive preparation method | |
| WO2022027823A1 (en) | Three-electrode repairable lithium ion battery | |
| CN211654941U (en) | Improved safety and voltage hysteresis battery structure | |
| CN207165694U (en) | A kind of cylindrical lithium ion battery for improving power battery core circulation part | |
| CN202839867U (en) | Electric core of coiled lithium ion secondary battery | |
| CN103346356B (en) | Lithium ion battery as well as preparation method thereof and lithium-ion battery pack | |
| CN202905908U (en) | Lithium ion secondary battery adopting coiled cell | |
| CN212485423U (en) | Battery with a battery cell | |
| CN201918464U (en) | High-magnification cylindrical lithium ion battery | |
| CN114976029A (en) | Battery cell and battery | |
| CN202772198U (en) | Square lithium ion battery in prestressed structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 430040 No.1, Taichung Avenue, Gaoqiao Industrial Park, Wujiashan Economic Development Zone, Wuhan City, Hubei Province Patentee after: Wuhan Haocheng lithium Technology Co.,Ltd. Address before: 430040 No.1, Taichung Avenue, Gaoqiao Industrial Park, Wujiashan Economic Development Zone, Wuhan City, Hubei Province Patentee before: WUHAN HAOCHENG ENERGY RESOURCES TECHNOLOGY Co.,Ltd. |