CN203166000U - An electrode for lithium ion batteries and a laminated battery body - Google Patents
An electrode for lithium ion batteries and a laminated battery body Download PDFInfo
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- CN203166000U CN203166000U CN2012202676123U CN201220267612U CN203166000U CN 203166000 U CN203166000 U CN 203166000U CN 2012202676123 U CN2012202676123 U CN 2012202676123U CN 201220267612 U CN201220267612 U CN 201220267612U CN 203166000 U CN203166000 U CN 203166000U
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- metal collector
- weld part
- lithium ion
- pole piece
- coated
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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 utility model relates to the field of lithium batteries, and discloses an electrode for lithium ion batteries and a laminated battery body. The electrode comprises: a metal current collector; wherein an active material layer is coated on the metal current collector; and the cross section of the width end of a tab welding portion extending from the metal current collector is coated with an insulating silica gel layer. By employing the electrode for lithium ion batteries and a laminated battery body, short circuits caused by separator stab can be effectively prevented in applications.
Description
Technical field
The utility model relates to the lithium ion battery field, particularly a kind of lithium ion battery pole piece and lamination electricity core body.
Background technology
Lithium ion battery since have operating voltage height, specific energy density big, have extended cycle life, advantage such as self-discharge rate is low, memory-less effect and environmental pollution are little, obtained huge business success in fields such as mobile communication equipment, mobile electronic devices.In recent years, its range of application has expanded to fields such as electric tool, electric automobile, large-scale energy storage facility.
At the lithium ion battery that traditional field is used, Capacity Ratio is less, and discharge-rate is lower, the electric core assembling winding-structures that adopt of battery more.Adopt the battery of winding-structure very high to homogeneity and the coherence request of pole piece coating, and the coiling internal resistance of cell is bigger.Electric tool is very high to the high-rate discharge ability requirement of battery with lithium ion battery, so require to reduce the internal resistance of battery as far as possible; Electrokinetic cell fields such as used for electric vehicle then require battery that very high capacity and lower internal resistance are arranged.In these fields, people are more prone to adopt the lamination lithium ion battery.
The lamination lithium ion battery refers to the positive/negative plate of the battery storehouse that alternately superposes, and separates by barrier film between positive plate, the negative plate, and the lamination mode has " Z " shape lamination and pocket type lamination dual mode usually.
Each positive plate in laminated batteries, the width end of negative plate leads to one or more lug weld part respectively, after lamination, the lug weld part that all positive plates are drawn is over against stacked formation anode ear weld part sequence, the lug weld part that all negative plates are drawn is over against stacked formation negative electrode lug weld part sequence, after lamination, the crooked anode ear weld part sequence of difference, negative electrode lug weld part sequence, make up and down over against each stacked lug weld part difference laser welding together, then in anode ear weld part sequence, difference weld metal bar (being generally the nickel bar) forms anode ear on the negative electrode lug weld part sequence, negative electrode lug.
In research process of the present utility model, the inventor finds that there is following defective at least in prior art:
Because stacked electric core body has certain thickness, so when difference anode ear weld part sequence, negative electrode lug weld part sequence and welding anode ear, negative electrode lug, depart from the lug weld part and the lug that weld median plane and can form certain radian, and from the welding median plane more away from, radian is more big.Like this, if battery lamination is irregular, perhaps pole piece is loosening, and lug weld part or lug bend formed cambered surface and contact with pole piece easily, and are short-circuited.
Summary of the invention
The utility model embodiment first purpose is to provide a kind of lithium ion battery pole piece, and it can effectively avoid barrier film puncture short circuit in application.
The utility model embodiment second purpose is to provide a kind of lamination electricity core body, and it can effectively avoid barrier film puncture short circuit in application.
A kind of lithium ion battery pole piece comprises metal collector, in the surface-coated of described metal collector active material layer is arranged,
The cross-sectional surface that is extended with the width end of lug weld part in described metal collector is coated with the Silicon-On-Insulator glue-line.
Alternatively, described active material layer comprises LiFePO4, Kynoar, conductive carbon black and the N-methyl pyrrolidone of mixing.
Alternatively, described metal collector is aluminium foil.
Alternatively, described active material layer comprises graphite, sodium carboxymethylcellulose, the butadiene-styrene rubber of mixing.
Alternatively, described metal collector is Copper Foil.
A kind of lamination electricity core body that the utility model embodiment provides comprises: barrier film stacked together, a plurality of positive plate, a plurality of negative plate,
Described barrier film is arranged respectively between adjacent arbitrarily described positive plate and negative plate at interval,
The cross section that is extended with the end of lug weld part at described electric core body is coated with the Silicon-On-Insulator glue-line, and described Silicon-On-Insulator glue-line is covered in the cross section of each described positive plate, negative plate.
Alternatively, the active material that is coated in the metal collector table surface of described positive plate comprises: LiFePO4, Kynoar, conductive carbon black and N-methyl pyrrolidone.
Alternatively, described metal collector is aluminium foil.
Alternatively, the active material that is coated in the metal collector table surface of described positive plate comprises: graphite, sodium carboxymethylcellulose, butadiene-styrene rubber.
Alternatively, described metal collector is Copper Foil.
Therefore, use the technical scheme of the utility model embodiment, also be coated with the Silicon-On-Insulator glue-line on the cross section owing to the end that is extended with the lug weld part at pole piece, when utilizing the lug of said structure to make lamination lithium-ion electric core body like this, because the cross section at the collector that is extended with the lug weld part is coated with the Silicon-On-Insulator glue-line, then will be up and down crooked and weld together the time and during soldering polar ear and after the welding over against stacked lug weld part, even arbitrary pole piece position skew, have the Silicon-On-Insulator glue-line owing to be extended with the end of lug weld part at pole piece, this Silicon-On-Insulator glue-line can intercept contacting of lug weld part or lug and pole piece, effectively keeps away contact short circuit.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, does not constitute to improper restriction of the present utility model, in the accompanying drawings:
A kind of pole piece structural representation that Fig. 1 provides for the utility model embodiment 1;
A kind of lamination li-ion electrode structural representation that Fig. 2 provides for the utility model embodiment 1;
Fig. 3 is the main TV structure schematic diagram of Fig. 2;
The structural representation of the another kind of lithium-ion electric core body that provides among the utility model embodiment 2 is provided Fig. 4.
Embodiment
Describe the utility model in detail below in conjunction with accompanying drawing and specific embodiment, be used for explaining the utility model in this illustrative examples of the present utility model and explanation, but not as to restriction of the present utility model.
Embodiment 1:
Referring to Fig. 1, shown in 2, a kind of lithium ion battery pole piece that present embodiment provides, mainly comprise: metal collector 101, surface-coated in this metal collector 101 has active material layer 102, on this metal collector 101, also be extended with lug weld part 103, uncoated on this lug weld part 103 have active material layer 102 and metal base exposed, the end that in the present embodiment this is extended with lug weld part 103 is first end 201 very, is coated with the Silicon-On-Insulator glue-line at the cross section (indicating the zone of oblique line among Fig. 2) of the first end 201 of metal collector 101.
Therefore, use the present embodiment technical scheme, also be coated with the Silicon-On-Insulator glue-line on the cross section owing to the end 201 that is extended with lug weld part 103 at pole piece, when utilizing the lug of said structure to make lamination lithium-ion electric core body like this, because the cross section in the end 201 of the collector that is extended with lug weld part 103 is coated with the Silicon-On-Insulator glue-line, then will be up and down crooked and weld together the time and during soldering polar ear and after the welding over against stacked lug weld part 103, even arbitrary pole piece position skew, have the Silicon-On-Insulator glue-line owing to be extended with the end of lug weld part 103 at pole piece, this Silicon-On-Insulator glue-line can intercept contacting of lug weld part 103 or lug and pole piece, effectively keeps away contact short circuit.
The present embodiment technical scheme can be applied to positive plate and negative plate, when this pole piece is positive plate, can but be not limited to adopt Copper Foil as metal collector 101, surface-coated positive electrode active materials in this metal collector 101, in the present embodiment can but be not limited to adopt following positive electrode active materials, this positive electrode active materials is made up of following material: be positive electrode with LiFePO4 (chemical formula is LiFePO4), be adhesive with Kynoar (being PVDF), be that conductive agent is mixed into N-methyl pyrrolidone (N-methyl-2-pyrrolidone by predetermined ratio with the conductive carbon black, abbreviation NMP) fully mixes in and obtain mixed slurry, then this mixed slurry is applied on the metal collector 101, then through super-dry, after the roll-in, obtain concrete positive plate according to predetermined pole piece shape cut-parts;
When this pole piece is negative plate, can but be not limited to adopt aluminium foil as metal collector 101, surface-coated negative active core-shell material in this metal collector 101, in the present embodiment can but be not limited to adopt following negative active core-shell material, this negative active core-shell material is made up of following material: be negative active core-shell material with the modified natural graphite, be thickener with the sodium carboxymethylcellulose, be binding agent with butadiene-styrene rubber, mix according to predetermined ratio, fully stir and obtain cathode size, this cathode size is applied on the metal collector 101, then through super-dry, after the roll-in, obtain concrete negative plate according to predetermined pole piece shape cut-parts.
Be extended with the surface-coated Silicon-On-Insulator rubber cement material of cross section of the end 201 of lug weld part 103 then at each pole piece, drying is solidified Silicon-On-Insulator rubber cement material.
Embodiment 2:
Referring to shown in Figure 3, present embodiment provides a kind of lamination lithium-ion electric core body, this lamination electricity core body mainly comprises stacked on top of one another positive plate (the not shown in the figures meaning out together, its structure can but be not limited to as shown in Example 1), negative plate (the not shown in the figures meaning out, its structure can but be not limited to as shown in Example 1) and barrier film, be separated with barrier film between all between adjacent arbitrarily positive plate and the negative plate.
Be extended with the lug weld part 301 of protrusion at least one width end of each positive plate, negative plate respectively by metal collector, in the surperficial uncoated of this lug weld part 301 active material layer arranged, and metal collector is exposed.
This lamination lithium-ion electric core body can be made by " Z " shape lamination or pocket type lamination or other lamination modes.
After lamination finishes, the cross-sectional surface that is extended with the end 302 of lug weld part 301 at this lamination body applies insulation silica gel, drying makes the Silicon-On-Insulator adhesive curing, carrying out the bending of lug weld part 301 then welds and connects, each positive plate, negative plate are formed are connected in parallel, then and connect after positive pole lug weld part 301, negative pole lug weld part 301 respectively the weld metal bars form anode ears, negative electrode lug.
Therefore, owing in the lithium ion battery of present embodiment, lead to lug weld part 301(and namely lead to lug) the cross section of end 302 on also be coated with the Silicon-On-Insulator glue-line, and use this technical scheme, in the laminated batteries manufacture process, with crooked and when welding together and during soldering polar ear and after the welding over against stacked lug weld part 301 up and down, even arbitrary pole piece position skew, have the Silicon-On-Insulator glue-line owing to be extended with the end of lug weld part 301 at pole piece, this Silicon-On-Insulator glue-line can intercept contacting of lug weld part 301 or lug and pole piece, effectively keeps away contact short circuit.
In the present embodiment, the Silicon-On-Insulator glue-line of the cross section of lamination electricity core body end 302 both can be before lamination, respectively in the end coated that leads to lug weld part 301 of each pole piece, also can utilize conventional pole piece to carry out lamination, after lamination, the cross section that respectively leads to the end 302 of lug weld part 301 on the lamination body applies, carry out the bending of lug weld part 301 then and connect, the welding of lug.
The present embodiment technical scheme can be applied to positive plate and negative plate, when this pole piece is positive plate, can but be not limited to adopt Copper Foil as metal collector, surface-coated positive electrode active materials in this metal collector, in the present embodiment can but be not limited to adopt following positive electrode active materials, this positive electrode active materials is made up of following material: be positive electrode with LiFePO4 (chemical formula is LiFePO4), be adhesive with Kynoar (being PVDF), be that conductive agent is mixed into N-methyl pyrrolidone (N-methyl-2-pyrrolidone by predetermined ratio with the conductive carbon black, abbreviation NMP) fully mixes in and obtain mixed slurry, then this mixed slurry is applied on the metal collector, then through super-dry, after the roll-in, obtain concrete positive plate according to predetermined pole piece shape cut-parts;
When this pole piece is negative plate, can but be not limited to adopt aluminium foil as metal collector, surface-coated negative active core-shell material in this metal collector, in the present embodiment can but be not limited to adopt following negative active core-shell material, this negative active core-shell material is made up of following material: be negative active core-shell material with the modified natural graphite, be thickener with the sodium carboxymethylcellulose, be binding agent with butadiene-styrene rubber, mix according to predetermined ratio, fully stir and obtain cathode size, this cathode size is applied on the metal collector, then through super-dry, after the roll-in, obtain concrete negative plate according to predetermined pole piece shape cut-parts.This anode active material layer comprises LiFePO4, Kynoar, conductive carbon black and the N-methyl pyrrolidone of mixing.
Referring to shown in Figure 4, the present embodiment technical scheme can also be applied to be extended with respectively at the both ends 401,402 of electric core body the lamination lithium ion battery of lug weld part 403, is coated with the Silicon-On-Insulator glue-line respectively on the both ends 401 of this lamination lithium ion battery, 402 cross section.
More than technical scheme that the utility model embodiment is provided be described in detail, used specific case herein principle and the execution mode of the utility model embodiment are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the utility model embodiment; Simultaneously, for one of ordinary skill in the art, according to the utility model embodiment, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as restriction of the present utility model.
Claims (6)
1. a lithium ion battery pole piece is characterized in that, comprises metal collector, in the surface-coated of described metal collector active material layer is arranged,
The cross-sectional surface that is extended with the width end of lug weld part in described metal collector is coated with the Silicon-On-Insulator glue-line.
2. lithium ion battery pole piece according to claim 1 is characterized in that, described metal collector is aluminium foil.
3. lithium ion battery pole piece according to claim 1 is characterized in that, described metal collector is Copper Foil.
4. a lamination electricity core body is characterized in that, comprising: barrier film stacked together, a plurality of positive plate, a plurality of negative plate,
Described barrier film is arranged respectively between adjacent arbitrarily described positive plate and negative plate at interval,
The cross section that is extended with the end of lug weld part at described electric core body is coated with the Silicon-On-Insulator glue-line, and described Silicon-On-Insulator glue-line is covered in the cross section of each described positive plate, negative plate.
5. lamination electricity core body according to claim 4 is characterized in that described metal collector is aluminium foil.
6. lamination electricity core body according to claim 4 is characterized in that described metal collector is Copper Foil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202676123U CN203166000U (en) | 2012-06-07 | 2012-06-07 | An electrode for lithium ion batteries and a laminated battery body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202676123U CN203166000U (en) | 2012-06-07 | 2012-06-07 | An electrode for lithium ion batteries and a laminated battery body |
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| Publication Number | Publication Date |
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| CN203166000U true CN203166000U (en) | 2013-08-28 |
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| CN2012202676123U Expired - Fee Related CN203166000U (en) | 2012-06-07 | 2012-06-07 | An electrode for lithium ion batteries and a laminated battery body |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474621A (en) * | 2012-06-07 | 2013-12-25 | 深圳市海盈科技有限公司 | Pole piece and laminated electrical core body for lithium ion battery |
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- 2012-06-07 CN CN2012202676123U patent/CN203166000U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474621A (en) * | 2012-06-07 | 2013-12-25 | 深圳市海盈科技有限公司 | Pole piece and laminated electrical core body for lithium ion battery |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: No. 26, A14 building 518110 Guangdong Province, Shenzhen city Longhua District Guanlan community library pit rich Ao Bei industrial area 2 floor A Patentee after: Haiying Science & Technology Co., Ltd., Shenzhen City Address before: Baoan District City, Guangdong province Shenzhen Guanlan street 518109 community Si Li Fu Keng Road third industrial area A2 building 4 floor B Patentee before: Haiying Science & Technology Co., Ltd., Shenzhen City |
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| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN HAIYING TECHNOLOGY CO., LTD. Free format text: FORMER NAME: HAIYING SCIENCE + TECHNOLOGY CO., LTD., SHENZHEN CITY |
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| CP03 | Change of name, title or address |
Address after: No. 26, A14 building 518131 Guangdong Province, Shenzhen city Longhua District Guanlan community library pit rich Ao Bei industrial area 2 floor A Patentee after: SHENZHEN HAI YING TECHNOLOGY CO., LTD. Address before: No. 26, A14 building 518110 Guangdong Province, Shenzhen city Longhua District Guanlan community library pit rich Ao Bei industrial area 2 floor A Patentee before: Haiying Science & Technology Co., Ltd., Shenzhen City |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20210607 |