CN109786643A - A kind of battery pole piece positive and negative anodes structure - Google Patents
A kind of battery pole piece positive and negative anodes structure Download PDFInfo
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- CN109786643A CN109786643A CN201910104504.0A CN201910104504A CN109786643A CN 109786643 A CN109786643 A CN 109786643A CN 201910104504 A CN201910104504 A CN 201910104504A CN 109786643 A CN109786643 A CN 109786643A
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- pole piece
- anode
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- cathode
- welding section
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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
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Abstract
The invention discloses a kind of battery pole piece positive and negative anodes structures, are related to field of lithium, comprising: anode pole piece and cathode pole piece；Anode pole piece includes positive pole ear welding section and anode pole piece applying area；Positive pole ear welding section is for welding positive pole ear, and anode pole piece applying area is for being coated with anode sizing agent；Cathode pole piece includes negative lug welding section and cathode pole piece applying area；Negative lug welding section is for welding negative lug, and cathode pole piece applying area is for being coated with negative electrode slurry；The first edge of anode pole piece is arranged in the symmetrical shape of anode pole piece and cathode pole piece, positive pole ear welding section, and the second edge of cathode pole piece is arranged in negative lug welding section；Second edge of anode pole piece is provided with vacancy section corresponding with negative lug welding section, and the first edge of cathode pole piece is provided with vacancy section corresponding with positive pole ear welding section.Reduce battery core capacitance loss caused by tab.
Description
Technical field
The present invention relates to field of lithium, especially a kind of battery pole piece positive and negative anodes structure.
Background technique
In traditional lithium battery, as depicted in figs. 1 and 2, either positive or cathode, tab and pole piece are one whole
Body, when encapsulation, the tab of pole piece needs to fold rear plug in Z-shaped into aluminum hull cavity, and tab is connect with shell, passes through shell general
Electrode is drawn, therefore aluminum hull cavity needs reserved space to store for tab, please refers to Fig. 1 and Fig. 2, since tab needs completely
Cavity is filled in, the two sides of tab waste a part of white space, so that the parking space of battery core is had compressed, so that entire battery core
Capacitance loss 3%~5%.
Summary of the invention
The present invention regarding to the issue above and technical need, proposes a kind of battery pole piece positive and negative anodes structure.
Technical scheme is as follows:
A kind of battery pole piece positive and negative anodes structure, comprising: anode pole piece and cathode pole piece；
The anode pole piece includes positive pole ear welding section and anode pole piece applying area；The positive pole ear welding section is used for
Positive pole ear is welded, the anode pole piece applying area is for being coated with anode sizing agent；
The cathode pole piece includes negative lug welding section and cathode pole piece applying area；The negative lug welding section is used for
Negative lug is welded, the cathode pole piece applying area is for being coated with negative electrode slurry；
The symmetrical shape of the anode pole piece and the cathode pole piece, the positive pole ear welding section are arranged in the anode
The second edge of the cathode pole piece is arranged in first edge of pole piece, the negative lug welding section；The anode pole
Second edge of piece is provided with vacancy section corresponding with the negative lug welding section, the first edge of the cathode pole piece
It is provided with vacancy section corresponding with the positive pole ear welding section.
Its further technical solution are as follows: first edge is parallel with second edge.
Its further technical solution are as follows: the anode sizing agent is aluminium foil.
Its further technical solution are as follows: the cathode pole piece is copper foil.
Its further technical solution are as follows:
The positive pole ear welded on the positive pole ear welding section is directly anchored between shell, is drawn anode by conductive sheet
Hull outside out, the anode pole piece sealing is inside housings；
The negative lug welded on the negative lug welding section is directly anchored between shell, is drawn cathode by conductive sheet
Hull outside out, the cathode pole piece sealing is inside housings.
The method have the benefit that:
By the way that tab welding area is arranged on positive and negative anodes pole piece, other regions except tab welding area are used as tab to apply
There was only least a portion of tab welding area in the pole piece that is, enclosure interior includes to expand the area of tab applying area in cloth area
It is occupied, reduces because lug bending is into the occupied space of cavity, thus battery core capacity caused by reducing because of tab by tab
Loss.
Detailed description of the invention
Fig. 1 is the schematic diagram of the anode pole piece structure of conventional batteries.
Fig. 2 is the schematic diagram of the cathode pole piece structure of conventional batteries.
Fig. 3 is the schematic diagram of the anode pole piece structure of battery pole piece provided by one embodiment of the present invention.
Fig. 4 is the schematic diagram of the cathode pole piece structure of battery pole piece provided by one embodiment of the present invention.
Specific embodiment
The following further describes the specific embodiments of the present invention with reference to the drawings.
In conjunction with reference Fig. 3 and Fig. 4, wherein Fig. 3 is the anode pole piece structure of battery pole piece, and Fig. 4 is the cathode of battery pole piece
The symmetrical shape of pole piece structure, anode pole piece and cathode pole piece.
As shown in figure 3, anode pole piece includes positive pole ear welding section 1 and anode pole piece applying area 2；Positive pole ear welding section
1 for welding positive pole ear, and anode pole piece applying area 2 is for being coated with anode sizing agent.
Region on anode pole piece other than positive pole ear welding section 1 is used as anode pole piece applying area 2.
Optionally, anode sizing agent is aluminium foil.
The positive pole ear welded on positive pole ear welding section 1 is directly anchored between shell, is drawn anode by conductive sheet
Hull outside, anode pole piece seal inside housings.That is, the positive pole ear in the embodiment of the present invention is without being folded into Z
Font plug in the cavity, but directly it is smooth be stuck between shell, anode is drawn by the conductive sheet being connect with positive pole ear
Hull outside is arrived out, shell is interior in addition to small part tab welding area the space occupied, other regions are used as the parking space of battery core,
To increase battery core capacity.
As shown in figure 4, cathode pole piece includes negative lug welding section 3 and cathode pole piece applying area 4；Negative lug welding section
3 for welding negative lug, and cathode pole piece applying area 4 is for being coated with negative electrode slurry.
Region on cathode pole piece other than negative lug welding section 3 is used as cathode pole piece applying area 4.
Optionally, negative electrode slurry is copper foil.
The negative lug welded on negative lug welding section 3 directly stretches out hull outside, and cathode pole piece is sealed in shell
Portion.
The negative lug welded on negative lug welding section 3 is directly anchored between shell, is drawn cathode by conductive sheet
Hull outside, cathode pole piece seal inside housings.That is, the negative lug in the embodiment of the present invention is without being folded into Z
Font plug in the cavity, but directly it is smooth be stuck between shell, cathode is drawn by the conductive sheet being connect with negative lug
Hull outside is arrived out, shell is interior in addition to small part tab welding area the space occupied, other regions are used as the parking space of battery core,
To increase battery core capacity.
Wherein, the first edge of anode pole piece is arranged in positive pole ear welding section 1, and the setting of negative lug welding section 3 exists
Second edge of cathode pole piece；Second edge of anode pole piece is provided with vacancy section corresponding with negative lug welding section 3,
First edge of cathode pole piece is provided with vacancy section corresponding with positive pole ear welding section 1.
Due in subsequent technique, needing multi-disc anode pole piece and cathode pole piece carrying out stacked spaced apart, on anode pole piece
Vacancy section is set with 3 corresponding position of negative lug welding section, negative lug can be sheltered to avoid anode pole piece after stacking
Welding section 3, then welding a negative lug among the negative lug welding section 3 of stacking can be by the cathode pole of all stackings
The electrode of piece is drawn；Vacancy section is set with 1 corresponding position of positive pole ear welding section on cathode pole piece, it can be to avoid stacking
Cathode pole piece shelters from positive pole ear welding section 1 afterwards, and a positive pole is then welded among the positive pole ear welding section 1 of stacking
Ear can draw the electrode of the anode pole piece of all stackings.
In practical applications, directly contacted when being stacked in order to avoid anode pole piece and cathode pole piece, can anode pole piece with
The diaphragm of insulation is placed among cathode pole piece, the shape of diaphragm and the shape of positive/negative plate are identical, and weld with positive pole ear
The corresponding position in area 1 and negative lug welding section 3 is equipped with vacancy section.
It should be noted that the shape of the anode pole piece and cathode pole piece that generally include tab welding area and vacancy section is square
Shape, the anode pole piece and cathode pole piece provided in the embodiment of the present invention, positive pole ear welding section 1 and negative lug welding section 3 are only
The region for accounting for very little reduces the occupancy in space in cavity since the tab of welding does not need to be bent into Z-shaped, in addition, as schemed
Shown in 3 and Fig. 4, the length of positive pole ear welding section 1 is less than the first edge, and the length of negative lug welding section 3 is less than the second side
Edge, in this case, the region of 1 two sides of positive pole ear welding section are included in anode pole piece applying area 2, negative lug welding section
The region of 3 two sides is included in cathode pole piece applying area 4, avoids 3 two sides of positive pole ear welding section 1 and negative lug welding section
The waste in region, the anode pole piece and cathode pole piece of inside cavity heap poststack are in addition to welding in positive pole ear welding section 1 and negative lug
3 the space occupied of area is connect, remaining region is used to the storage of battery core, so that the capacity of battery core increases.
Illustratively, as shown in Figure 3 and Figure 4, the first edge is parallel with the second edge, i.e. anode pole piece and cathode pole piece
Exterior contour is rectangle, and tab welding area and vacancy section are arranged on one group of opposite side of rectangle, and anode pole piece and cathode pole
The position in tab welding area and vacancy section in piece is exactly the opposite.
Above-described is only preferred embodiments of the invention, and present invention is not limited to the above embodiments.It is appreciated that this
The other improvements and change that field technical staff directly exports or associates without departing from the spirit and concept in the present invention
Change, is considered as being included within protection scope of the present invention.
Claims (5)
1. a kind of battery pole piece positive and negative anodes structure characterized by comprising anode pole piece and cathode pole piece；
The anode pole piece includes positive pole ear welding section and anode pole piece applying area；The positive pole ear welding section is for welding
Positive pole ear, the anode pole piece applying area is for being coated with anode sizing agent；
The cathode pole piece includes negative lug welding section and cathode pole piece applying area；The negative lug welding section is for welding
Negative lug, the cathode pole piece applying area is for being coated with negative electrode slurry；
The symmetrical shape of the anode pole piece and the cathode pole piece, the positive pole ear welding section are arranged in the anode pole piece
The first edge, the second edge of the cathode pole piece is arranged in the negative lug welding section；The anode pole piece
Second edge is provided with vacancy section corresponding with the negative lug welding section, the first edge setting of the cathode pole piece
There is vacancy section corresponding with the positive pole ear welding section.
2. battery pole piece positive and negative anodes structure according to claim 1, which is characterized in that first edge and described second
Edge is parallel.
3. battery pole piece positive and negative anodes structure according to claim 1, which is characterized in that the anode sizing agent is aluminium foil.
4. battery pole piece positive and negative anodes structure according to claim 1, which is characterized in that the cathode pole piece is copper foil.
5. battery pole piece positive and negative anodes structure according to any one of claims 1 to 4, which is characterized in that the positive pole ear weldering
It connects the positive pole ear welded in area to be directly anchored between shell, anode is drawn into hull outside, the anode pole by conductive sheet
Piece seals inside housings；
The negative lug welded on the negative lug welding section is directly anchored between shell, and cathode is drawn shell by conductive sheet
Outside body, the cathode pole piece sealing is inside housings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910104504.0A CN109786643A (en) | 2019-02-01 | 2019-02-01 | A kind of battery pole piece positive and negative anodes structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910104504.0A CN109786643A (en) | 2019-02-01 | 2019-02-01 | A kind of battery pole piece positive and negative anodes structure |
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| Publication Number | Publication Date |
|---|---|
| CN109786643A true CN109786643A (en) | 2019-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910104504.0A Pending CN109786643A (en) | 2019-02-01 | 2019-02-01 | A kind of battery pole piece positive and negative anodes structure |
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| CN (1) | CN109786643A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024092638A1 (en) * | 2022-11-03 | 2024-05-10 | 宁德时代新能源科技股份有限公司 | Electrode assembly and manufacturing method therefor, battery cell, battery, and electric device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0636801A (en) * | 1992-07-13 | 1994-02-10 | Nippon Telegr & Teleph Corp <Ntt> | Rectangular shape nonaqueous electrolyte secondary battery |
| CN202373667U (en) * | 2011-12-21 | 2012-08-08 | 东莞新能源科技有限公司 | Electrical core of lithium ion battery and pole piece thereof |
| CN202495523U (en) * | 2012-02-27 | 2012-10-17 | 宁德新能源科技有限公司 | Lithium ion battery and electrode plate thereof |
| CN106159196A (en) * | 2016-08-29 | 2016-11-23 | 天津力神电池股份有限公司 | Bury lug formula pole piece and lithium ion battery |
| WO2018007606A1 (en) * | 2016-07-07 | 2018-01-11 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | High-capacity metal-ion electrochemical accumulator the flexibility of which allows great conformability |
| CN108134130A (en) * | 2018-01-18 | 2018-06-08 | 深圳市格瑞普电池有限公司 | Button laminated lithium ion battery |
| CN207947340U (en) * | 2018-01-17 | 2018-10-09 | 柔电（武汉）科技有限公司 | Electrode slice, battery core with high-energy density and flexible package lithium cell |
-
2019
- 2019-02-01 CN CN201910104504.0A patent/CN109786643A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0636801A (en) * | 1992-07-13 | 1994-02-10 | Nippon Telegr & Teleph Corp <Ntt> | Rectangular shape nonaqueous electrolyte secondary battery |
| CN202373667U (en) * | 2011-12-21 | 2012-08-08 | 东莞新能源科技有限公司 | Electrical core of lithium ion battery and pole piece thereof |
| CN202495523U (en) * | 2012-02-27 | 2012-10-17 | 宁德新能源科技有限公司 | Lithium ion battery and electrode plate thereof |
| WO2018007606A1 (en) * | 2016-07-07 | 2018-01-11 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | High-capacity metal-ion electrochemical accumulator the flexibility of which allows great conformability |
| CN106159196A (en) * | 2016-08-29 | 2016-11-23 | 天津力神电池股份有限公司 | Bury lug formula pole piece and lithium ion battery |
| CN207947340U (en) * | 2018-01-17 | 2018-10-09 | 柔电（武汉）科技有限公司 | Electrode slice, battery core with high-energy density and flexible package lithium cell |
| CN108134130A (en) * | 2018-01-18 | 2018-06-08 | 深圳市格瑞普电池有限公司 | Button laminated lithium ion battery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024092638A1 (en) * | 2022-11-03 | 2024-05-10 | 宁德时代新能源科技股份有限公司 | Electrode assembly and manufacturing method therefor, battery cell, battery, and electric device |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20200604 Address after: 430000 workshop 5, zone 7, zhuanyang Private Industrial Park, Caidian Economic Development Zone, Wuhan City, Hubei Province Applicant after: Wuhan Lanjun New Energy Technology Co.,Ltd. Address before: No. 63 Hongchang Road, Hongshan Street, Wuxi City, Jiangsu Province Applicant before: JIANGSU YECHEN INTELLIGENT TECHNOLOGY Co.,Ltd. |
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200817 Address after: Room 202, building 1, 9855 Puwei Road, Fengxian District, Shanghai 201400 Applicant after: Shanghai Lanjun New Energy Technology Co., Ltd Address before: 430000 workshop 5, zone 7, zhuanyang Private Industrial Park, Caidian Economic Development Zone, Wuhan City, Hubei Province Applicant before: Wuhan Lanjun New Energy Technology Co.,Ltd. |
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| TA01 | Transfer of patent application right | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190521 |
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| RJ01 | Rejection of invention patent application after publication |