CN113285125A - Cutting sheet-making type lithium ion battery and preparation method thereof - Google Patents
Cutting sheet-making type lithium ion battery and preparation method thereof Download PDFInfo
- Publication number
- CN113285125A CN113285125A CN202110432457.XA CN202110432457A CN113285125A CN 113285125 A CN113285125 A CN 113285125A CN 202110432457 A CN202110432457 A CN 202110432457A CN 113285125 A CN113285125 A CN 113285125A
- Authority
- CN
- China
- Prior art keywords
- battery
- pole piece
- lithium ion
- area
- blank area
- 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.)
- Pending
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 27
- 238000005520 cutting process Methods 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 62
- 238000000576 coating method Methods 0.000 claims abstract description 62
- 238000004804 winding Methods 0.000 claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000007772 electrode material Substances 0.000 claims abstract description 8
- 239000000758 substrate Substances 0.000 claims description 10
- 238000003698 laser cutting Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 238000003466 welding Methods 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 description 3
- 239000007773 negative electrode material Substances 0.000 description 3
- 239000007774 positive electrode material Substances 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Images
Classifications
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- 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
- H01M10/0422—Cells or battery with cylindrical casing
-
- 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
- H01M10/0422—Cells or battery with cylindrical casing
- H01M10/0427—Button cells
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a cutting sheet-making type lithium ion battery and a preparation method thereof, wherein the cutting sheet-making type lithium ion battery comprises a battery shell and a winding battery cell; the winding battery core comprises a battery pole piece, the battery pole piece comprises a coating area and a blank area adjacent to the coating area, the coating area is coated with an electrode material, and the blank area is directly connected with a battery case or is connected with a metal contact on the battery case. The battery pole piece is directly connected with the battery shell, so that the traditional process of overlapping and welding the pole piece with the pole piece is omitted, the process flow is effectively simplified, the production automation degree is improved, the risk of short circuit and fire caused by the fact that the pole piece is wrapped in the pole piece and a diaphragm is punctured is avoided, and the safety performance of the battery is improved; in addition, no traditional pole lug occupies the internal space of the battery, so that the energy density of the battery in unit volume is greatly improved. The preparation method of the cutting sheet-making type lithium ion battery provided by the invention has the advantages of simple process, easiness in realization, high production efficiency and capability of improving the comprehensive competitiveness of products.
Description
Technical Field
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a cutting sheet-making type lithium ion battery and a preparation method thereof.
Background
Common methods for assembling lithium ion battery cells include a laminated type and a winding type. It is usually necessary to weld the positive and negative electrode tabs on the pole piece to the housing or connect the positive and negative electrodes out through a soft package mode. The existing method wastes time on the manufacturing process and has low production efficiency; the pole lugs are made of metal materials, so that the pole lugs are wrapped in the pole pieces and are easy to pierce the diaphragm to cause short circuit and fire; in addition, the pole lugs occupy a lot of effective space in the shell, and energy density loss in unit volume is caused.
Disclosure of Invention
In view of the above disadvantages, the present invention provides a cutting sheet-making lithium ion battery with a smart and reasonable structure design.
The invention also provides a preparation method of the cutting sheet-making type lithium ion battery.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a preparation method of a cutting sheet-making type lithium ion battery comprises the following steps:
(1) preparing an electrode substrate on which a coating area and a blank area adjacent to the coating area are planned;
(2) coating electrode material on the coating area, and leaving blank area blank;
(3) cutting the electrode substrate subjected to the step (2) into strips to obtain a battery pole piece; the battery pole piece comprises a coating area and a blank area, wherein the blank area protrudes from one side of the coating area;
(4) after the battery pole piece is wound into a winding battery cell, the blank area is positioned at the end face of the winding battery cell;
(5) and folding the blank area flat and directly connecting the blank area with a battery shell or connecting the blank area with a metal joint preset on the battery shell.
As a preferable mode of the present invention, the step (3) is performed by laser cutting or die cutting into a bar.
In a preferred embodiment of the present invention, in the step (5), the blank region is connected to a battery case or a metal contact provided in the battery case in advance by ultrasonic waves or laser.
A cutting sheet-making type lithium ion battery comprises a battery shell and a winding battery cell packaged in the battery shell; the winding battery cell comprises a battery pole piece, the battery pole piece comprises a coating area and a blank area adjacent to the coating area, the blank area protrudes from one side of the coating area, the coating area is coated with an electrode material, after the battery pole piece is wound into the winding battery cell, the blank area is located at the end face of the winding battery cell, and the blank area is directly connected with the battery case or is connected with a metal contact point preset on the battery case.
As a preferable scheme of the invention, the overall outline of the battery pole piece is L-shaped.
As a preferable scheme of the present invention, the battery pole piece includes a positive pole piece and a negative pole piece, and blank regions of the positive pole piece and the negative pole piece are both located at an end face position of the winding electric core.
As a preferable aspect of the present invention, the battery pole piece includes a positive pole piece and a negative pole piece, the blank regions of the positive pole piece are located at one end face of the wound battery cell, and the blank regions of the negative pole piece are located at the other end face of the wound battery cell.
In a preferred embodiment of the present invention, the number of the metal contacts is two, and the two metal contacts are arranged side by side on the battery case and are insulated from each other.
As a preferable scheme of the present invention, both surfaces of the battery pole piece are provided with coating regions. Namely, the battery pole piece adopts double-sided coating, and the energy density can be improved.
As a preferable scheme of the invention, the battery is a button battery or a cylindrical battery, and the application range is wide.
The invention has the beneficial effects that: the battery pole piece is directly connected with the battery shell, so that the traditional process of overlapping and welding pole lugs by the pole pieces is omitted, the process flow is effectively simplified, the production automation degree is improved, the risk of short circuit and fire caused by the fact that the pole lugs are wrapped in the pole pieces and the diaphragms are punctured is avoided, and the safety performance of the battery is improved; in addition, no traditional pole lug occupies the internal space of the battery, so that the energy density of the battery in unit volume is greatly improved. The preparation method of the cutting sheet-making type lithium ion battery provided by the invention has the advantages of simple process, easiness in realization and high production efficiency, not only can improve the safety of the product and improve the product performance, but also has lower cost and improves the comprehensive competitiveness of the product.
The invention is further illustrated by the following figures and examples.
Drawings
FIG. 1 is a flow chart of a manufacturing process of example 1 of the present invention.
Fig. 2 is a schematic structural view of embodiment 1 of the present invention.
FIG. 3 is a flow chart of the manufacturing process of example 2 of the present invention.
Fig. 4 is a schematic structural diagram of embodiment 2 of the present invention.
FIG. 5 is a flow chart of a manufacturing process of example 3 of the present invention.
Fig. 6 is a schematic structural diagram of embodiment 3 of the present invention.
Fig. 7 is a schematic structural view of embodiment 4 of the present invention.
Detailed Description
Example 1: referring to fig. 1 and 2, the present embodiment provides a cutting sheet-type lithium ion battery and a method for manufacturing the same, which includes the following steps:
(1) preparing an electrode substrate on which a coating area 1 and a blank area 2 adjacent to the coating area 1 are planned;
(2) coating an electrode material on the coating area 1, and leaving a blank area 2 blank; coating a positive electrode material on the coating area 1 correspondingly when the positive plate needs to be prepared; coating negative electrode materials on the coating area 1 correspondingly when the positive plate needs to be prepared; preferably, coating regions 1 are arranged on both surfaces of the battery pole piece. Namely, the battery pole piece adopts double-sided coating, and the energy density can be improved.
(3) Cutting the electrode substrate subjected to the step (2) into strips to obtain a battery pole piece; the battery pole piece comprises a coating area 1 and a blank area 2, wherein the blank area 2 protrudes from one side of the coating area 1, and the overall outline of the battery pole piece is L-shaped;
(4) after the battery pole piece is wound into a winding battery cell 7, the blank area 2 is positioned at the end face of the winding battery cell 7; in this embodiment, the battery pole piece includes a positive pole piece and a negative pole piece, and the blank regions 2 of the positive pole piece and the negative pole piece are both located at an end face of the winding electric core 7;
(5) and folding the blank area 2 flat and directly connecting with a metal joint preset on the battery shell. Specifically, the battery case comprises an upper cover 3 and a lower cover 4 matched with the upper cover 3, two metal contacts 5 are arranged on the upper cover 3 side by side, and the two metal contacts 5 are insulated and do not contact with each other. The upper cover 3 and the lower cover 4 are closed and sealed by a press, and an intermediate insulating spacer 6 is arranged between the upper cover 3 and the lower cover 4 for insulation. At this time, the blank regions 2 of the positive plate and the negative plate are respectively connected and conducted with the two metal contacts 5. The metal contact 5 can be effectively welded to the blank regions 2 of the positive and negative electrode sheets by using ultrasonic waves or laser beams on the surface of or inside the metal contact 5.
Example 2: referring to fig. 3 to 4, the present embodiment provides a cut sheet-type lithium ion battery and a method for manufacturing the same, which includes the following steps:
(1) preparing an electrode substrate on which a coating area 1 and a blank area 2 adjacent to the coating area 1 are planned;
(2) coating an electrode material on the coating area 1, and leaving a blank area 2 blank; coating a positive electrode material on the coating area 1 correspondingly when the positive plate needs to be prepared; coating negative electrode materials on the coating area 1 correspondingly when the positive plate needs to be prepared; preferably, coating regions 1 are arranged on both surfaces of the battery pole piece. Namely, the battery pole piece adopts double-sided coating, and the energy density can be improved.
(3) Cutting the electrode substrate subjected to the step (2) into strips to obtain a battery pole piece; the battery pole piece comprises a coating area 1 and a blank area 2, wherein the blank area 2 protrudes from one side of the coating area 1, and the overall outline of the battery pole piece is L-shaped;
(4) after the battery pole piece is wound into a winding battery cell 7, the blank area 2 is positioned at the end face of the winding battery cell 7; in this embodiment, the battery pole piece includes a positive pole piece and a negative pole piece, the blank regions 2 of the positive pole piece are all located at one end face of the winding electric core 7, and the blank regions 2 of the negative pole piece are all located at the other end face of the winding electric core 7;
(5) the blank region 2 is folded flat and directly connected to the battery case. Specifically, the battery case comprises an upper cover 3 and a lower cover 4 matched with the upper cover 3. The upper cover 3 and the lower cover 4 are closed and sealed by a press, and an intermediate insulating spacer 6 is arranged between the upper cover 3 and the lower cover 4 for insulation. At this time, the blank regions 2 of the positive plate and the negative plate are respectively connected and conducted with the inner surfaces of the upper cover 3 and the lower cover 4. Ultrasonic waves or laser can be used on the surfaces of or inside the upper cover 3 and the lower cover 4 to effectively weld the upper cover 3 and the lower cover 4 with the blank regions 2 of the positive plate and the negative plate, respectively.
Example 3: referring to fig. 4 to 5, the present embodiment provides a cut sheet-type lithium ion battery and a method for manufacturing the same, which includes the following steps:
(1) preparing an electrode substrate on which a coating area 1 and a blank area 2 adjacent to the coating area 1 are planned;
(2) coating an electrode material on the coating area 1, and leaving a blank area 2 blank; coating a positive electrode material on the coating area 1 correspondingly when the positive plate needs to be prepared; coating negative electrode materials on the coating area 1 correspondingly when the positive plate needs to be prepared; preferably, coating regions 1 are arranged on both surfaces of the battery pole piece. Namely, the battery pole piece adopts double-sided coating, and the energy density can be improved.
(3) Cutting the electrode substrate subjected to the step (2) into strips to obtain a battery pole piece; the battery pole piece comprises a coating area 1 and a blank area 2, wherein the blank area 2 protrudes from one side of the coating area 1, and the overall outline of the battery pole piece is L-shaped;
(4) after the battery pole piece is wound into a winding battery cell 7, the blank area 2 is positioned at the end face of the winding battery cell 7; in this embodiment, the battery pole piece includes a positive pole piece and a negative pole piece, the blank regions 2 of the positive pole piece are all located at one end face of the winding electric core 7, and the blank regions 2 of the negative pole piece are all located at the other end face of the winding electric core 7; the blank regions 2 on the positive plate and the negative plate are long in length and are wound for a circle along the circumferential direction of the winding battery cell 7;
(5) and (3) spinning and flattening the blank area 2 and directly connecting the blank area with a battery shell. Specifically, the battery case comprises an upper cover 3 and a lower cover 4 matched with the upper cover 3. The upper cover 3 and the lower cover 4 are closed and sealed by a press, and an intermediate insulating spacer 6 is arranged between the upper cover 3 and the lower cover 4 for insulation. At this time, the blank regions 2 of the positive plate and the negative plate are respectively connected and conducted with the inner surfaces of the upper cover 3 and the lower cover 4. Ultrasonic waves or laser can be used on the surfaces of or inside the upper cover 3 and the lower cover 4 to effectively weld the upper cover 3 and the lower cover 4 with the blank regions 2 of the positive plate and the negative plate, respectively.
Example 4: referring to fig. 6, this embodiment provides a cut sheet-type lithium ion battery and a method for manufacturing the same, which is substantially the same as embodiment 2 or embodiment 3 except that the battery has a high overall height, and is a cylindrical battery. While examples 2 and 3 are button cells. During production, the height of the winding cell 7 in embodiment 2 or embodiment 3 is increased correspondingly.
The above examples 1 to 4 are only preferred embodiments of the present invention, and the present invention is not limited to all embodiments, and it is within the scope of the present invention that the battery case may have a regular or irregular shape such as a triangle, an ellipse, or a hexagon, by using the technical solution of one of the above examples, or by performing equivalent changes according to the above examples.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims 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. Other batteries and methods of manufacture, which are similar or identical to the above-described embodiments of the present invention, are also within the scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110432457.XA CN113285125A (en) | 2021-04-21 | 2021-04-21 | Cutting sheet-making type lithium ion battery and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110432457.XA CN113285125A (en) | 2021-04-21 | 2021-04-21 | Cutting sheet-making type lithium ion battery and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113285125A true CN113285125A (en) | 2021-08-20 |
Family
ID=77277113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110432457.XA Pending CN113285125A (en) | 2021-04-21 | 2021-04-21 | Cutting sheet-making type lithium ion battery and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113285125A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4465393A1 (en) * | 2023-05-13 | 2024-11-20 | VARTA Microbattery GmbH | Button electrochemical cell and method of making |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09161837A (en) * | 1995-12-06 | 1997-06-20 | Matsushita Electric Ind Co Ltd | Cylindrical battery |
| CN101604763A (en) * | 2009-07-07 | 2009-12-16 | 广东国光电子有限公司 | A kind of narrow type lithium-ion battery and manufacturing process thereof |
| CN102357923A (en) * | 2011-09-06 | 2012-02-22 | 深圳市格瑞普电池有限公司 | Pole piece dividing and cutting die and coating production method of pole piece |
| CN109599597A (en) * | 2017-09-30 | 2019-04-09 | 横店集团东磁股份有限公司 | A kind of high current battery core and the power battery comprising the battery core |
| CN215527760U (en) * | 2021-04-21 | 2022-01-14 | 东莞市慧衍电子有限公司 | Cutting film-making type lithium ion battery |
-
2021
- 2021-04-21 CN CN202110432457.XA patent/CN113285125A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09161837A (en) * | 1995-12-06 | 1997-06-20 | Matsushita Electric Ind Co Ltd | Cylindrical battery |
| CN101604763A (en) * | 2009-07-07 | 2009-12-16 | 广东国光电子有限公司 | A kind of narrow type lithium-ion battery and manufacturing process thereof |
| CN102357923A (en) * | 2011-09-06 | 2012-02-22 | 深圳市格瑞普电池有限公司 | Pole piece dividing and cutting die and coating production method of pole piece |
| CN109599597A (en) * | 2017-09-30 | 2019-04-09 | 横店集团东磁股份有限公司 | A kind of high current battery core and the power battery comprising the battery core |
| CN215527760U (en) * | 2021-04-21 | 2022-01-14 | 东莞市慧衍电子有限公司 | Cutting film-making type lithium ion battery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4465393A1 (en) * | 2023-05-13 | 2024-11-20 | VARTA Microbattery GmbH | Button electrochemical cell and method of making |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112542641B (en) | A cylindrical battery and its manufacturing method | |
| CN108933222B (en) | Preparation method of multi-tab secondary lithium ion battery | |
| CN103779528B (en) | A kind of column lithium ion battery assembly technology | |
| TWI517477B (en) | A large capacity cylindrical lithium ion battery and its production method | |
| WO2020078081A1 (en) | Laminated cell and manufacturing method therefor, and lithium battery | |
| CN202662698U (en) | Cylindrical lithium ion battery | |
| CN111354912B (en) | Electric connection method, electric connection structure and product of button cell pole shell and electrode lug | |
| CN108808114A (en) | A kind of rectangular multi pole ears wound lithium-ion battery assembly method | |
| CN103490089A (en) | Electrode subassembly, preparation method thereof and lithium secondary battery | |
| CN110364674A (en) | A kind of high-voltage pouch battery and preparation method thereof | |
| CN112290077A (en) | Tab-free battery and preparation method thereof | |
| CN115939685A (en) | Current collecting disc, battery cover plate assembly, cylindrical battery and assembly process | |
| CN115719849A (en) | Cylindrical battery suitable for high-speed production and assembly process thereof | |
| CN215527760U (en) | Cutting film-making type lithium ion battery | |
| CN113285125A (en) | Cutting sheet-making type lithium ion battery and preparation method thereof | |
| CN216698664U (en) | Pole piece and pole group | |
| CN204905358U (en) | Coiling power lithium ion battery | |
| CN116525971B (en) | Cylindrical battery with I-shaped mandrel | |
| CN216054863U (en) | Winding spinning button type lithium ion battery | |
| EP4084193A1 (en) | Square winded button lithium battery | |
| CN214588966U (en) | Square winding button type lithium battery | |
| CN217485674U (en) | Cylindrical battery | |
| CN114388743B (en) | Optimized preparation method of cylindrical lithium ion battery pole group | |
| WO2022188400A1 (en) | Cylindrical lithium ion battery and manufacturing method therefor | |
| CN212461774U (en) | Cylindrical battery parallel winding core structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |