CN114709463A - Square winding battery structure and production method - Google Patents
Square winding battery structure and production method Download PDFInfo
- Publication number
- CN114709463A CN114709463A CN202210399606.1A CN202210399606A CN114709463A CN 114709463 A CN114709463 A CN 114709463A CN 202210399606 A CN202210399606 A CN 202210399606A CN 114709463 A CN114709463 A CN 114709463A
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- CN
- China
- Prior art keywords
- pole piece
- negative pole
- positive pole
- battery
- core
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/654—Means for temperature control structurally associated with the cells located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
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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
Abstract
A square wound battery structure and method of manufacture. A square winding battery structure comprises a plate core, and a positive pole piece and a negative pole piece which are wound by taking the plate core as an axis, wherein a diaphragm is arranged between the positive pole piece and the negative pole piece, the positive pole piece extends upwards to form a positive pole lug, and the negative pole piece extends downwards to form a negative pole lug. The invention also provides a production method of the battery. The application provides a this kind of battery, energy density is higher, and is efficient in effect, and the yields is high, and the radiating efficiency is good and can also provide the temperature and the internal pressure monitoring data in the battery use, provides fine data foundation for the safe handling of battery.
Description
Technical Field
The invention relates to a battery, in particular to a structure and a production method of a square winding type battery.
Background
The development of new energy automobiles, which gradually replaces fuel oil automobiles, has become a direction of consensus and effort in all countries in the world, electric automobiles are the new energy automobiles with the best development potential, however, the bottleneck influencing the development of electric automobiles is rechargeable batteries, and the endurance, service life and safety of the rechargeable batteries are the most concerned problems. The shape of the battery can be roughly divided into a square battery and a cylindrical battery, and the cylindrical battery has the main defects of low energy density, mature winding processing technology and high product yield; the square battery has high energy density, but most of the square batteries are laminated batteries, the laminated processing efficiency is low, the yield is low, the square battery is also processed in a winding mode, a core plate is needed during winding, a positive pole piece, a diaphragm and a negative pole piece are wound on the core plate, finally the core plate is removed, the middle part is vacant, the positive pole piece and the negative pole piece wound inside the core plate collapse, the phenomenon can cause the hidden troubles that the positive pole plate and the negative pole plate are extruded and damaged, in addition, the battery temperature is raised due to overhigh current during charging and discharging, the heat dissipation of the battery is an urgent problem to be solved, the accident problem of the battery heat dissipation of many electric vehicles cannot be well solved, the heat dissipation utilizes a coolant to accelerate the circulation heat exchange, the heat dissipation is also realized by utilizing the lugs of the battery, the successful case of the heat dissipation of the battery can be fully utilized on the market, the applicant filed a patent application No. 2022204985820 with a patent name of "a tab structure for improving heat exchange efficiency" for this problem, and provided a fully tab rechargeable battery, but this patent application is directed to a laminated square battery, and it is obvious that the technology of this patent is not applicable when the tab is further processed in the winding battery related to this application.
Disclosure of Invention
The invention aims to solve the technical problems and provides a square winding battery structure which can enhance the heat conduction of the battery, keep high energy density and is convenient to process and produce.
The square winding battery structure comprises a plate core, and a positive pole piece and a negative pole piece which are wound by taking the plate core as an axis, wherein a diaphragm is arranged between the positive pole piece and the negative pole piece, the positive pole piece extends upwards to form a positive pole lug, and the negative pole piece extends downwards to form a negative pole lug.
Preferably, the board core is provided with a clamping groove, and a temperature sensor is arranged in the clamping groove.
Preferably, the plate core is provided with a clamping groove, and a gas pressure sensor is arranged in the clamping groove.
Preferably, the square wound battery comprises arc areas at two sides and a square area in the middle, and the positive electrode tab and the negative electrode tab are arranged in the square area.
The invention also provides a production mode of the square winding battery, which comprises the following steps:
winding the positive pole piece, the diaphragm, the negative pole piece and the diaphragm by overlapping the plate core, wherein the positive pole piece extends upwards to form a positive pole lug, and the negative pole piece extends downwards to form a negative pole lug;
inserting the wound roll core into a square battery shell;
cutting off the positive electrode tab and the negative electrode tab in the arc-shaped area;
bundling the positive pole tab and the negative pole tab according to a plurality of pieces;
respectively sleeving cooling fins on the positive electrode lug and the negative electrode lug, welding, and baking for drying;
bottom packaging, electrolyte injection and upper packaging;
and mounting caps at two ends of the anode and the cathode, and welding.
Preferably, the middle of the board core is provided with a slot, and a temperature sensor is arranged in the slot.
Preferably, the middle of the plate core is provided with a slot, and a gas pressure sensor is arranged in the slot.
The application provides a this kind of battery, energy density is higher, and is efficient in effect, and the yields is high, and the radiating efficiency is good and can also provide the temperature and the internal pressure monitoring data in the battery use, provides fine data foundation for the safe handling of battery.
Drawings
FIG. 1 is a schematic diagram of a core construction;
FIG. 2 is a cross-sectional view of a battery construction;
FIG. 3 is a top view of the battery;
fig. 4 is a longitudinal sectional view of the battery.
Detailed Description
The present invention will be further described with reference to the following examples in conjunction with the accompanying drawings.
Most processes of the battery production method provided by the embodiment are the same as those of the existing battery processes, and the differences are emphasized with reference to fig. 1 to 4, and the beneficial effects caused by the differences are explained. The square winding battery structure comprises a plate core 10, wherein the plate core 10 is made of high-temperature-resistant plastic materials and is a plate-shaped body with cambered surfaces on two sides, a slot 11 is formed in the plate core 10, and a temperature sensor 20 and a gas pressure sensor 30 are arranged in the slot 11, wherein the temperature sensor 20 is positioned in a hollow hole so that two sides can be in contact with pole pieces, the temperature in the battery can be measured immediately, and the gas pressure sensor 30 is not in contact with the pole pieces on two sides and is in a non-pressure state; the positive pole piece 40, the diaphragm 50, the negative pole piece 60 and the diaphragm 50 are sequentially overlapped by taking the plate core 10 as an axis for winding, in addition, the positive pole piece 40 extends upwards to form a positive pole tab 41, the negative pole piece 60 extends downwards to form a negative pole tab 61, as shown in figure 4 (the diaphragm is not shown), and after the winding is finished, the wound core is inserted into the square battery shell 70; at the moment, the electrode lugs of the square winding battery comprise arc-shaped areas at two sides and a square area in the middle, the electrode lugs in the arc-shaped areas are cut off by laser, namely, the anode electrode lug and the cathode electrode lug are arranged in the square areas, see fig. 3, and then the anode electrode lug and the cathode electrode lug are bundled into a group by a plurality of pieces so that the electrode lugs are mutually connected; respectively sleeving a heat radiating fin 80 on the positive electrode lug and the negative electrode lug, performing direct current welding to enhance the heat radiating effect, baking and drying, encapsulating the bottom, injecting electrolyte, and encapsulating the upper part; and finally, mounting caps at the two ends of the anode and the cathode, and completing welding.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The utility model provides a square coiling battery structure which characterized in that includes the positive pole piece, the negative pole piece that the board core was used as the axle to convolute, wherein is equipped with the diaphragm between positive pole piece, negative pole piece, and positive pole piece upwards extends and forms positive pole utmost point ear, and negative pole piece extends downwards and forms negative pole utmost point ear.
2. The prismatic winding battery structure according to claim 1, wherein the core is provided with a slot in which a temperature sensor is disposed.
3. The prismatic winding battery structure according to claim 1, wherein the core is provided with a slot in which a gas pressure sensor is provided.
4. The prismatic winding battery structure according to claim 1, 2 or 3, wherein the prismatic winding battery comprises arc-shaped regions at both sides and a prismatic region in the middle, and the positive electrode tab and the negative electrode tab are provided in the prismatic regions.
5. A production mode of a square winding battery is characterized by comprising the following steps:
winding the positive pole piece, the diaphragm, the negative pole piece and the diaphragm by overlapping the plate core, wherein the positive pole piece extends upwards to form a positive pole lug, and the negative pole piece extends downwards to form a negative pole lug;
inserting the wound roll core into a square battery shell;
cutting off the positive electrode tab and the negative electrode tab in the arc-shaped area;
bundling the positive pole tab and the negative pole tab according to a plurality of pieces;
respectively sleeving cooling fins on the positive electrode lug and the negative electrode lug, welding, and baking for drying;
bottom packaging, electrolyte injection and upper packaging;
and installing caps at the two ends of the anode and the cathode, and welding.
6. The production method of claim 5, wherein the board core is provided with a slot in the middle, and the slot is provided with a temperature sensor.
7. The production method according to claim 5, wherein a slot is arranged in the middle of the plate core, and a gas pressure sensor is arranged in the slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210399606.1A CN114709463A (en) | 2022-04-15 | 2022-04-15 | Square winding battery structure and production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210399606.1A CN114709463A (en) | 2022-04-15 | 2022-04-15 | Square winding battery structure and production method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114709463A true CN114709463A (en) | 2022-07-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210399606.1A Pending CN114709463A (en) | 2022-04-15 | 2022-04-15 | Square winding battery structure and production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114709463A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115000527A (en) * | 2022-08-03 | 2022-09-02 | 楚能新能源股份有限公司 | Square lithium ion battery cell and manufacturing process and application thereof |
-
2022
- 2022-04-15 CN CN202210399606.1A patent/CN114709463A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115000527A (en) * | 2022-08-03 | 2022-09-02 | 楚能新能源股份有限公司 | Square lithium ion battery cell and manufacturing process and application thereof |
| CN115000527B (en) * | 2022-08-03 | 2022-10-04 | 楚能新能源股份有限公司 | Square lithium ion battery cell, manufacturing process and application |
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