CN215869700U - Soft package lithium ion battery cell without Tab sheet - Google Patents
Soft package lithium ion battery cell without Tab sheet Download PDFInfo
- Publication number
- CN215869700U CN215869700U CN202121383868.6U CN202121383868U CN215869700U CN 215869700 U CN215869700 U CN 215869700U CN 202121383868 U CN202121383868 U CN 202121383868U CN 215869700 U CN215869700 U CN 215869700U
- Authority
- CN
- China
- Prior art keywords
- tab
- positive
- glue
- battery cell
- ear
- 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
Classifications
-
- 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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a Tab-sheet-free soft-package lithium ion battery cell, which comprises a positive plate, a negative plate, a diaphragm, Tab glue and an aluminum plastic film, wherein the positive plate, the negative plate and the diaphragm are sequentially laminated or wound to form a bare cell, the Tab glue on all positive plates is adjacent to the end head, the Tab glue on all negative plates is adjacent to the end head, the edge pressing treatment is carried out on the Tab glue on all positive plates and the edge pressing treatment is carried out on the Tab glue on all negative plates, so that the thickness of all tabs is reduced and the tabs are gathered at the edge pressing positions, the Tab glue is adhered to the edge pressing positions of the positive and negative plates, the bare cell adhered with the Tab glue is arranged in the aluminum plastic film, the Tab glue on the positive and negative plates is respectively connected with the top sealing positions of the aluminum plastic film in a heat sealing manner, and the parts of the positive and negative tabs extending out of the aluminum plastic film are respectively welded and gathered. The utility model does not set tab, which increases the size of the pole piece, reduces the weight of the battery cell, reduces the cost, not only reduces the raw material cost of the battery cell, but also improves the weight energy density and the volume energy density of the battery cell.
Description
Technical Field
The utility model relates to the field of soft package lithium ion batteries, in particular to a Tab-sheet-free soft package lithium ion battery core.
Background
With the gradual popularization of automobile electromotion, the requirements for improving the energy density and reducing the cost of the lithium ion battery are higher and higher. The soft package battery adopts the aluminum plastic film as the packaging material, has the characteristics of light weight and high energy density, and is considered as an important direction for the development of future power lithium ion batteries. The cost and specific energy of the lithium ion battery are important bottlenecks for limiting the large-scale application of the lithium ion power battery, and the current soft package battery core is guided by welding a Tab sheet, so that the weight of the battery core is increased, the cost of raw materials is improved, the space utilization rate of the battery core is reduced, and the improvement of the capacity of the battery core is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a Tab-sheet-free soft-package lithium ion battery cell, and the weight energy density and the volume energy density of the battery cell are improved.
The technical scheme of the utility model is as follows:
a soft-package lithium ion battery cell without Tab sheet comprises a positive plate, a negative plate, a diaphragm, a Tab adhesive and an aluminum plastic film, the positive plate, the negative plate and the diaphragm are sequentially laminated or wound to form a bare cell, each positive plate of the bare cell is provided with a positive tab, each negative plate is provided with a negative tab, the edge pressing treatment of the positions, adjacent to the ends, of the positive tabs on all the positive plates enables all the positive tabs to be thinned and gathered at the edges pressing positions, the edge pressing treatment of the positions, adjacent to the ends, of the negative tabs on all the negative plates enables all the negative tabs to be thinned and gathered at the edges pressing positions, the edge pressing positions of the positive tabs and the negative tabs are adhered with tab glue, the bare cell adhered with the tab glue is placed in an aluminum plastic film, and the tab glue on the positive tab and the negative tab is respectively connected with the top sealing part of the aluminum-plastic film in a heat-sealing manner, and the parts of the positive tab and the negative tab extending out of the aluminum-plastic film are respectively welded and gathered.
And the tab glue and the positive tab and the tab glue and the negative tab are bonded by hot pressing.
The two ends of the tab glue exceed the edges of the corresponding positive electrode tabs or negative electrode tabs by 1-3mm, the distance between the tab glue and the edges of the naked battery cell diaphragms is 2-5mm, and the width of the tab glue is 10-14 mm.
The width of the lug glue and the aluminum plastic film in heat sealing is smaller than that of the lug glue, and the heat sealing section of the lug glue is positioned in the middle section of the lug glue.
And the parts of the positive electrode lug and the negative electrode lug extending out of the aluminum plastic film are respectively subjected to ultrasonic welding or laser welding to gather.
The utility model has the advantages that:
(1) in the traditional battery cell welded with Tab sheets (aluminum sheets or copper sheets), the distance between Tab glue and the edge of a diaphragm is 7-10mm, the cost of the Tab sheets accounts for about 1.5% of the whole battery cell, and the weight of the Tab sheets accounts for 0.2% -0.6% of the whole battery cell.
(2) The utility model gathers and thins the edge of the tab in a blank pressing mode, thereby reducing the risk of leakage of the tab glue triangular area.
(3) The original naked battery cell formed by lamination or winding needs to be connected with the aluminum-plastic film after the tab is pre-welded, and the tab of the utility model can be directly connected with the aluminum-plastic film through the tab glue in a heat-sealing manner without pre-welding, thereby greatly improving the battery cell processing efficiency.
Drawings
Fig. 1 is a block diagram of a bare cell of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, a Tab-free soft-package lithium ion battery cell comprises a positive plate 1, a negative plate 2, a diaphragm 3, Tab glue 4 and an aluminum plastic film 8, wherein the positive plate 1, the negative plate 2 and the diaphragm 3 are sequentially laminated or wound to form a bare cell 7, each positive plate 1 of the bare cell 7 is provided with a positive Tab 5, each negative plate 2 is provided with a negative Tab 6, the edge pressing treatment is performed at the position adjacent to the end of the positive Tab 5 on all the positive plates to reduce the thickness of and gather together the positive tabs 5 at the edge pressing position, the edge pressing treatment is performed at the position adjacent to the end of the negative Tab 6 on all the negative plates to reduce the thickness of and gather together the negative tabs 6 at the edge pressing position, the Tab glue 4 is bonded at the edge pressing positions of the positive Tab 5 and the negative Tab 6 by soaking pressure (the hot-pressing temperature: 190 ℃, the hot-pressing pressure is 0.1-0.5Mpa, and the hot-5S time is 2-5S), the two ends of the Tab glue 4 exceed the corresponding positive Tab 5 or the edge of the negative Tab 5 or the negative Tab 6 by 1-3mm, the distance between the tab glue 4 and the edge of the naked cell diaphragm 3 is 2-5mm, the width of the tab glue 4 is 10-14mm, the naked cell 7 bonded with the tab glue 4 is arranged in the aluminum plastic film 8, the tab glue 4 on the positive tab 5 and the negative tab 6 is respectively connected with the top sealing part of the aluminum plastic film 8 in a heat sealing way (the heat sealing temperature is 160-180 ℃, the heat sealing pressure is 0.1-0.4Mpa, and the heat sealing time is 1-3s), the heat sealing width of the tab glue 4 and the aluminum plastic film 8 is smaller than that of the tab glue 4, the heat sealing section of the tab glue 4 is positioned at the middle section of the tab glue 4, and the parts of the positive tab 5 and the negative tab 6 extending out of the aluminum plastic film 8 are respectively subjected to ultrasonic welding or laser welding gathering.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a no soft packet of lithium ion battery cell of Tab piece which characterized in that: including positive plate, negative pole piece, diaphragm, utmost point ear glue and plastic-aluminum membrane, positive plate, negative pole piece and diaphragm laminate in proper order or convolute and form naked electric core, all be provided with positive ear on every positive plate of naked electric core, all be provided with the negative pole ear on every negative pole piece, positive ear near end blank pressing processing on all positive pole pieces makes all positive ears locate thickness attenuate and gather together at the blank pressing, negative pole ear near end blank pressing processing on all negative pole pieces makes all negative pole ears locate thickness attenuate and gather together at the blank pressing, the blank pressing department of positive ear and negative pole ear all adheres utmost point ear glue, the naked electric core that bonds to have utmost point ear glue is arranged in the plastic-aluminum membrane, and utmost point ear glue on positive ear and the negative pole ear respectively with the top seal department heat-seal connection of plastic-aluminum membrane, positive ear and negative pole ear stretch out the part outside the plastic-aluminum membrane and weld respectively and gather together.
2. The Tab-sheet-free soft-package lithium ion battery cell of claim 1, wherein: and the tab glue and the positive tab and the tab glue and the negative tab are bonded by hot pressing.
3. The Tab-sheet-free soft-package lithium ion battery cell of claim 1, wherein: the two ends of the tab glue exceed the edges of the corresponding positive electrode tabs or negative electrode tabs by 1-3mm, the distance between the tab glue and the edges of the naked battery cell diaphragms is 2-5mm, and the width of the tab glue is 10-14 mm.
4. The Tab-sheet-free soft-package lithium ion battery cell of claim 1, wherein: the width of the lug glue and the aluminum plastic film in heat sealing is smaller than that of the lug glue, and the heat sealing section of the lug glue is positioned in the middle section of the lug glue.
5. The Tab-sheet-free soft-package lithium ion battery cell of claim 1, wherein: and the parts of the positive electrode lug and the negative electrode lug extending out of the aluminum plastic film are respectively subjected to ultrasonic welding or laser welding to gather.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121383868.6U CN215869700U (en) | 2021-06-21 | 2021-06-21 | Soft package lithium ion battery cell without Tab sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121383868.6U CN215869700U (en) | 2021-06-21 | 2021-06-21 | Soft package lithium ion battery cell without Tab sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215869700U true CN215869700U (en) | 2022-02-18 |
Family
ID=80334910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121383868.6U Active CN215869700U (en) | 2021-06-21 | 2021-06-21 | Soft package lithium ion battery cell without Tab sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215869700U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116598561A (en) * | 2023-05-09 | 2023-08-15 | 深圳欣视界科技有限公司 | Packaging method of laminated battery cell and laminated battery |
-
2021
- 2021-06-21 CN CN202121383868.6U patent/CN215869700U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116598561A (en) * | 2023-05-09 | 2023-08-15 | 深圳欣视界科技有限公司 | Packaging method of laminated battery cell and laminated battery |
| CN116598561B (en) * | 2023-05-09 | 2024-04-16 | 深圳欣界能源科技有限公司 | Packaging method of laminated battery cell and laminated battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109830638B (en) | High-hardness flexible-package lithium ion battery pole piece and roll core preparation method | |
| CN213304296U (en) | Multi-tab battery cell | |
| CN104681878B (en) | The preparation method and coiled lithium ion battery of a kind of coiled lithium ion battery | |
| WO2024045738A1 (en) | Battery and battery manufacturing method | |
| CN215869700U (en) | Soft package lithium ion battery cell without Tab sheet | |
| CN109585908A (en) | A kind of flexible packing lithium ion electric core and battery | |
| CN102623667A (en) | Soft package thin and ultrathin cell structure and manufacturing method thereof | |
| CN210926193U (en) | Soft packet of lithium ion battery, battery package and electric automobile | |
| CN210224211U (en) | Battery pole group, battery and vehicle | |
| CN213212234U (en) | Soft package battery | |
| CN107452934A (en) | Soft package lithium ion power battery tab welding structure and its welding method | |
| CN111403820A (en) | Core pack and manufacturing method thereof, single battery and manufacturing method and module thereof | |
| CN107919444B (en) | Battery, tab sheet body thereof and battery module using battery | |
| CN204885310U (en) | Soft package lithium -ion battery with H type lamination | |
| CN202094230U (en) | Ultrathin polymer lithium ion battery | |
| CN218069953U (en) | Square power battery | |
| CN217641482U (en) | Double-core square lithium ion battery structure | |
| CN102694141A (en) | Novel aluminum-to-nickel conversion method of flexible packaging lithium ion battery | |
| CN101179136A (en) | Battery lamination type electric core and manufacturing method thereof | |
| CN219553673U (en) | Pole piece with multilayer current collector, battery winding core and high-rate battery | |
| CN210956890U (en) | Lithium ion ultra-narrow soft package battery | |
| CN114204105A (en) | Soft-packaged novel laminated lithium ion battery | |
| CN218548592U (en) | Electrodeless ear soft-package battery | |
| CN205828569U (en) | Secondary cell | |
| CN114367554B (en) | Shaping method for current collector lug of power battery and battery adopting shaping method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |