CN114094287A - Tab, battery cell, battery and method for manufacturing battery cell - Google Patents
Tab, battery cell, battery and method for manufacturing battery cell Download PDFInfo
- Publication number
- CN114094287A CN114094287A CN202111385304.0A CN202111385304A CN114094287A CN 114094287 A CN114094287 A CN 114094287A CN 202111385304 A CN202111385304 A CN 202111385304A CN 114094287 A CN114094287 A CN 114094287A
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- layer
- surface area
- tab
- metal strip
- metal
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 85
- 239000002184 metal Substances 0.000 claims abstract description 85
- 239000010410 layer Substances 0.000 claims description 75
- 238000007789 sealing Methods 0.000 claims description 26
- 230000003647 oxidation Effects 0.000 claims description 16
- 238000007254 oxidation reaction Methods 0.000 claims description 16
- 238000002161 passivation Methods 0.000 claims description 14
- 238000004806 packaging method and process Methods 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 13
- 239000011241 protective layer Substances 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 9
- 238000005538 encapsulation Methods 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 239000000155 melt Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 abstract description 18
- 239000002985 plastic film Substances 0.000 description 19
- 229920006255 plastic film Polymers 0.000 description 19
- 229910052782 aluminium Inorganic materials 0.000 description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 238000004804 winding Methods 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 238000010309 melting process Methods 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000011258 core-shell material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 238000004080 punching 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
- 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
- H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
-
- 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
- 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
- H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The application provides a utmost point ear, electric core, battery and method of preparation this electric core, and wherein, utmost point ear includes the strap, and the first surface area of strap is equipped with first oxide layer, and first oxide layer includes a plurality of micropores, and the value range in micropore aperture is 50 nanometers to 50 microns. The first surface area of the pole lug is provided with the first oxide layer comprising a plurality of micropores, so that the metal belt is not required to be covered with insulating glue, and the safety performance of the battery is improved by not covering the pole lug with the insulating glue.
Description
Technical Field
The application relates to the field of lithium ion batteries, in particular to a tab, a battery cell, a battery and a method for manufacturing the battery cell.
Background
With the rapid development of lithium ion battery technology, lithium ion batteries are more and more widely applied to portable mobile electronic devices such as notebook computers and smart phones. The tab of the lithium ion battery comprises a metal belt and insulating glue covered on the metal belt. On the one hand, after the pole lug is processed into a finished product, the pole lug needs to be carried for a long time and a long distance to enter an aluminum-plastic film melting process, so that a large amount of oxides and other pollutants are arranged on the surface of the insulating glue, and foreign matter media are generated when the insulating glue and the aluminum-plastic film are melted due to the oxides and the pollutants, so that poor melting is caused, and the safety performance of the battery is reduced. On the other hand, in the melting process of the aluminum-plastic film, the insulating glue is easy to cause poor extending of the insulating glue and poor deviation of the electrode lugs, and the safety performance of the battery is reduced.
In conclusion, in the prior art, the safety performance of the battery is reduced due to the existence of the insulating glue in the tab.
Disclosure of Invention
The embodiment of the application provides a tab, an electric core, a battery and a method for manufacturing the electric core, and solves the problem that the safety performance of the battery is reduced due to the existence of insulating glue in the tab.
In order to achieve the above object, in a first aspect, an embodiment of the present application provides a tab, including a metal strip, a first surface region of the metal strip is provided with a first oxide layer, the first oxide layer includes a plurality of micropores, and a value range of a pore diameter of the micropores is 50 nanometers to 50 micrometers.
Optionally, the first surface area has a value in a range of 0.1mm to 10mm in a length direction of the metal strip.
Optionally, the width of the first surface area in the width direction of the metal strip is the same as the width of the metal strip.
In a second aspect, an embodiment of the present application provides a battery cell, including a sealing layer and a tab as in the first aspect, where a sealing region of the sealing layer coincides with a first surface region of the metal tape, a protective layer is disposed on a first oxide layer of the first surface region, and the protective layer includes a melt of the sealing layer.
In a third aspect, an embodiment of the present application provides a battery, including the battery cell according to the second aspect.
In a fourth aspect, an embodiment of the present application provides a method for manufacturing a battery cell according to the second aspect, including:
obtaining a metal belt, and passivating a first surface area of the metal belt to enable the first surface area to be covered with a first oxidation layer, wherein the first oxidation layer comprises a plurality of micropores, and the pore diameter of each micropore ranges from 50 nanometers to 50 micrometers;
welding the metal band subjected to the passivation treatment on a current collector;
heating the metal belt welded on the current collector to a preset temperature;
and pressing the sealing area of the packaging layer and the first surface area through the end socket to obtain the battery cell.
Optionally, before the obtaining the metal strip and performing the passivation treatment on the first surface region of the metal strip, the method further includes:
and removing organic matters and a second oxidation layer on the surface of the metal belt by an ultrasonic technology or a friction technology, wherein the second oxidation layer is an oxidation layer naturally formed in the air by the metal belt.
Optionally, the preset temperature ranges from 110 degrees to 200 degrees.
Optionally, the head is a flat head.
Optionally, the pressing the sealing area of the encapsulation layer and the first surface area by the sealing head includes:
pressing a sealing area of the packaging layer and the first surface area through a sealing head so as to form a hydrogen bond between the sealing area and the first surface area;
and stopping pressing under the condition that the packaging layer is fused on the surface of the first oxide layer of the metal strip.
In the embodiment of the application, the tab comprises a metal band, a first surface area of the metal band is provided with a first oxidation layer, the first oxidation layer comprises a plurality of micropores, and the pore diameter of each micropore ranges from 50 nanometers to 50 micrometers. The first surface area of the pole lug is provided with the first oxide layer comprising a plurality of micropores, so that the metal belt is not required to be covered with insulating glue, and the safety performance of the battery is improved by not covering the pole lug with the insulating glue.
Drawings
For a clear explanation of the technical solutions in the embodiments of the present application, the drawings of the specification are described below, it is obvious that the following drawings are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the listed drawings without any inventive effort.
Fig. 1 is one of schematic structural diagrams of a tab provided in an embodiment of the present application;
fig. 2 is a second schematic structural diagram of a tab provided in the embodiment of the present application;
fig. 3 is a schematic flow chart of a method for manufacturing a battery cell provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of a battery cell provided in an embodiment of the present application in a manufacturing process;
fig. 5 is a schematic structural diagram of a processing device for a battery provided in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. On the basis of the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without any creative effort belong to the protection scope of the present application.
Referring to fig. 1, 2 and 4, the present application provides a tab, including a metal strip 1, a first surface region of the metal strip 1 is provided with a first oxide layer 2, the first oxide layer 2 includes a plurality of micropores, and a pore diameter of the micropores ranges from 50 nanometers to 50 micrometers.
Specifically, the tab may be a positive tab or a negative tab. When the tab is a positive tab, the metal belt 1 may be made of aluminum; when the tab is a negative electrode tab, the metal tape 1 may be nickel or nickel-plated copper. The shape of the metal strip 1 is not limited, and the metal strip 1 may have a rectangular shape, for example.
By having the first oxide layer 2 comprising a plurality of micropores with pore sizes ranging from 50 nm to 50 μm, more contact points can be provided for the heterointerface, thereby improving the bonding strength. In the aluminum plastic film melting step, the aluminum plastic film can be more preferably melted and covered on the first oxide layer 2.
In the embodiment of the application, the tab comprises a metal strip 1, a first oxide layer 2 is arranged on a first surface area of the metal strip 1, the first oxide layer 2 comprises a plurality of micropores, and the pore diameter of each micropore ranges from 50 nanometers to 50 micrometers. Through be equipped with the first oxide layer 2 including a plurality of micropores at the first surface region of utmost point ear to can need not to cover the insulating cement on strap 1, like this, through not covering the insulating cement on utmost point ear, improve the security performance of battery.
Optionally, the first surface area has a value in a range of 0.1mm to 10mm in a length direction of the metal strip 1. In a specific implementation, the first surface area may have a value of 0.1mm, 1.2mm, 2mm, 3.4mm, 4.8mm, 5.1mm, 6.2mm, 7mm, 8.5mm, 9.1mm, 10mm in the longitudinal direction of the metal strip 1. By the above-mentioned limitation, the aluminum plastic film can be more preferably melted and covered on the first oxide layer 2 in the aluminum plastic film melting process.
Optionally, the width of the first surface area in the width direction of the metal strip 1 is the same as the width of the metal strip 1. By making the width of the first surface area in the width direction of the metal strip 1 the same as the width of the metal strip 1, the plastic-aluminum film can be better melted and covered on the first oxide layer 2 in the plastic-aluminum film melting process.
The embodiment of the application provides a battery cell, including encapsulated layer and the utmost point ear that the embodiment of the application provided, the encapsulated layer seal the region with the first surface area coincidence of strap 1, be equipped with protective layer 5 on the first oxide layer 2 of first surface area, protective layer 5 includes the melt of encapsulated layer.
Specifically, in the aluminum-plastic film melting step, the aluminum-plastic film is melted to cover the first oxide layer 2, thereby forming the protective layer 5. The protective layer 5 is an insulating part on the tab and has the function of preventing short circuit between the metal strip 1 and the aluminum plastic film when the battery is packaged. Through being equipped with protective layer 5 on the first oxide layer 2 of utmost point ear, the effect of fungible insulating glue to can need not to cover insulating glue on strap 1, like this, through not covering insulating glue on utmost point ear, improve the security performance of battery.
The structure and the working principle of the tab provided by the embodiment of the application can refer to the embodiment, and are not described in detail herein. Because the electric core that this application embodiment provided includes the utmost point ear that this application embodiment provided, consequently have the whole beneficial effect of the utmost point ear that this application embodiment provided.
The embodiment of the application provides a battery, including the electric core that this application embodiment provided. The structure and the working principle of the battery core provided by the embodiment of the application can refer to the above embodiment, and are not described again here. Because the battery that this application embodiment provided includes the electric core that this application embodiment provided, consequently have the whole beneficial effect of the electric core that this application embodiment provided.
Referring to fig. 1, fig. 2, and fig. 3, an embodiment of the present application provides a method for manufacturing a battery cell provided in the embodiment of the present application, including:
In the specific implementation, the metal belt 1 can be made of aluminum under the condition that the tab is a positive tab; when the tab is a negative electrode tab, the tab may be nickel or nickel-plated copper. The shape of the metal strip 1 is not limited, and for example, the metal strip 1 may have a rectangular shape.
102, welding the metal belt 1 subjected to the passivation treatment on a current collector;
in a specific implementation, when the metal belt 1 is made of aluminum, the current collector may be made of aluminum; in the case where the metal strip 1 is nickel or copper-plated nickel, the current collector may be copper. By directly welding the passivated metal belt 1 on the current collector, 1 unit joint can be scrapped without joints with unit length under the condition that tabs are broken or jointed in the production process or the debugging process, and the unit length of the metal belt 1 is not required to be adjusted intentionally.
103, heating the metal belt 1 welded on the current collector to a preset temperature;
referring to fig. 4, the metal strip 1 may be heated by contacting or clamping the end of the metal strip 1 with a preheating block 3. The preset temperature can be determined according to actual needs, and optionally, the value range of the preset temperature is 110 to 200 degrees.
And 104, pressing the sealing area of the packaging layer and the first surface area through the end socket 4 to obtain the battery cell.
In a specific implementation, the encapsulation layer may be an aluminum-plastic film. The packaging layer wraps the wound or stacked pole pieces, and the sealing area at the top of the packaging layer is pressed with the first surface area through the seal head 4, so that the battery core is obtained. The heated metal tape 1 heats and melts the sealing layer covering the surface thereof, and the melted sealing layer covers the surface of the first oxide layer 2 to form the protective layer 5. The end socket 4 can be selected according to actual conditions, and optionally, the end socket 4 is a flat end socket.
In the embodiment of the application, acquire strap 1, and right the first surface area of strap 1 carries out passivation treatment, makes first surface area covers there is first oxide layer 2, first oxide layer 2 includes a plurality of micropores, the value scope in micropore aperture is 50 nanometers to 50 microns, will strap 1 after the passivation treatment welds on the mass flow body, will weld strap 1 on the mass flow body and heat to predetermineeing the temperature, through head 4 with the encapsulated layer seal the region with first surface area pressfitting, obtain electric core. The first surface area of the metal belt 1 is passivated, the sealing area of the packaging layer is pressed with the first surface area through the seal head 4, the battery core is obtained, the metal belt 1 of the pole lug is not required to be covered with insulating glue, and therefore the safety performance of the battery is improved by not covering the pole lug with the insulating glue.
Optionally, before the obtaining the metal strip 1 and passivating the first surface region of the metal strip 1, the method further includes: removing organic matters and a second oxidation layer on the surface of the metal belt 1 by an ultrasonic technology or a friction technology, wherein the second oxidation layer is an oxidation layer naturally formed in the air by the metal belt 1.
By removing the organic matter and the naturally formed second oxide layer on the surface of the metal strip 1 before the passivation process, it is possible to reduce impurities on the surface of the metal strip 1 and to make the first oxide layer 2 formed on the surface of the metal strip 1 better, thereby providing more contact points for the hetero interface and improving the bonding strength during the passivation process. In the aluminum plastic film melting step, the aluminum plastic film can be more preferably melted and covered on the first oxide layer 2.
Optionally, the pressing the sealing area of the encapsulation layer and the first surface area by the sealing head 4 includes: pressing a sealing area of the packaging layer and the first surface area through a sealing head 4, so that a hydrogen bond is formed between the sealing area and the first surface area; and stopping pressing under the condition that the packaging layer is fused on the surface of the first oxidation layer 2 of the metal strip 1.
During specific implementation, the protective layer 5 in the sealing area, namely the melted aluminum-plastic film, and the first oxide layer 2 in the first surface area form a hydrogen bond through the pressing of the end socket 4, so that the bonding strength between the first oxide layer 2 and the protective layer 5 is enhanced.
The following describes a method for manufacturing a battery cell provided in an embodiment of the present application with an example.
Referring to fig. 5, the metal strip 20 of the positive tab passes through a roller 21, a roller 22 and a roller 23 at the forefront, and then reaches a passivation mechanism 24 for passivation and cutting, the metal band 14 of the negative electrode lug enters a roller 15, a roller 16 and a roller 17 at the position opposite to the positive electrode lug in the ultrasonic welding or laser welding 12 to reach a negative electrode passivation processing mechanism 18 for passivation processing and cutting, the foil is welded by ultrasonic welding or laser welding 19, the anode, the cathode and the diaphragm simultaneously enter a winding core-winding mechanism 6 for winding, then enter a core-winding state detection mechanism 7, an aluminum plastic film punching type film molding mechanism 8, the winding core is placed in the film shell in the winding core shell entering mechanism 9, the position of the film shell is turned in the aluminum-plastic film shell turning mechanism 10, the top seal and heat seal are performed in the top seal and edge seal mechanism 11, and the finished product detection mechanism 13 detects the finished product after the package is completed.
The tab welding mainly includes, taking the positive tab as an example, after the positive tab metal strip 20 passes through the rollers 21, 22 and 23 at the forefront (it should be understood that the number of the rollers through which the positive tab metal strip 20 passes may be 2, also may be 2, or 10, or N, N being a positive integer, N being greater than 2 and less than 10), the metal strip enters the passivation processing mechanism 24, and the passivation processing and cutting are temporarily stopped (0.1-3S). The metal band 20 of the positive electrode tab and the pole piece foil are subjected to ultrasonic or laser welding through the welding mechanism 12, and the negative electrode tab is passivated, cut and welded in the same way.
The packaging process mainly comprises the steps that the metal belt of the lug can be directly subjected to hot melting packaging with the aluminum plastic film after being preheated, and meanwhile, the short circuit between the metal belt and the aluminum plastic film can be effectively prevented by melting overflowed glue through PP glue of the aluminum plastic film. The cell manufacturing method provided by the embodiment of the application also has great help to the improvement of the efficiency, and on one hand, if tab fracture or joint exists in the production process or the debugging process, the unit-length joint is not needed, only 1 unit of scrapped joint is needed, and the unit length of the tab metal belt is not needed to be adjusted intentionally. On the other hand, when the die is changed, the original tab on the equipment is not required to be removed under the condition that the thickness and the width of the tab metal belt are the same, and the purpose of changing the die can be achieved only by adjusting the cutting length of the tab.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the present embodiments are not limited to those precise embodiments, which are intended to be illustrative rather than restrictive, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope of the appended claims.
Claims (10)
1. The tab is characterized by comprising a metal belt, wherein a first surface area of the metal belt is provided with a first oxide layer, the first oxide layer comprises a plurality of micropores, and the pore diameter of each micropore ranges from 50 nanometers to 50 micrometers.
2. A tab as claimed in claim 1, wherein the first surface area has a value in the range of 0.1mm to 10mm in the lengthwise direction of the metal strip.
3. A tab as claimed in claim 1, wherein the first surface area has the same width as the metal strip in the width direction of the metal strip.
4. A battery cell, comprising a tab according to any of claims 1 to 3 and an encapsulation layer, wherein the sealing region of the encapsulation layer coincides with the first surface region of the metal strip, and wherein a protective layer is provided on the first oxide layer of the first surface region, wherein the protective layer comprises a melt of the encapsulation layer.
5. A battery comprising the cell of claim 4.
6. A method of making the cell of claim 4, comprising:
obtaining a metal belt, and passivating a first surface area of the metal belt to enable the first surface area to be covered with a first oxidation layer, wherein the first oxidation layer comprises a plurality of micropores, and the pore diameter of each micropore ranges from 50 nanometers to 50 micrometers;
welding the metal band subjected to the passivation treatment on a current collector;
heating the metal belt welded on the current collector to a preset temperature;
and pressing the sealing area of the packaging layer and the first surface area through the end socket to obtain the battery cell.
7. The method of claim 6, wherein prior to obtaining the metal strip and passivating the first surface region of the metal strip, the method further comprises:
and removing organic matters and a second oxidation layer on the surface of the metal belt by an ultrasonic technology or a friction technology, wherein the second oxidation layer is an oxidation layer naturally formed in the air by the metal belt.
8. The method of claim 6, wherein the preset temperature is in a range of 110 degrees to 200 degrees.
9. The method of claim 6, wherein the head is a flat head.
10. The method of claim 6, wherein the pressing the seal region of the encapsulation layer against the first surface region with the cap comprises:
pressing a sealing area of the packaging layer and the first surface area through a sealing head so as to form a hydrogen bond between the sealing area and the first surface area;
and stopping pressing under the condition that the packaging layer is fused on the surface of the first oxide layer of the metal strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111385304.0A CN114094287A (en) | 2021-11-22 | 2021-11-22 | Tab, battery cell, battery and method for manufacturing battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111385304.0A CN114094287A (en) | 2021-11-22 | 2021-11-22 | Tab, battery cell, battery and method for manufacturing battery cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114094287A true CN114094287A (en) | 2022-02-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111385304.0A Pending CN114094287A (en) | 2021-11-22 | 2021-11-22 | Tab, battery cell, battery and method for manufacturing battery cell |
Country Status (1)
| Country | Link |
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| CN (1) | CN114094287A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005158264A (en) * | 2003-09-04 | 2005-06-16 | Nissan Motor Co Ltd | Bipolar battery |
| CN106159344A (en) * | 2016-09-19 | 2016-11-23 | 中国电子科技集团公司第十八研究所 | Method for preventing tab of flexible package lithium battery from short circuit |
| CN106935784A (en) * | 2017-03-20 | 2017-07-07 | 四川恩莱极电子科技有限公司 | A kind of lithium battery pole ear surface treatment method |
| CN207781726U (en) * | 2018-01-17 | 2018-08-28 | 东莞市黄城河电子科技有限公司 | A kind of lug that welding is firm |
-
2021
- 2021-11-22 CN CN202111385304.0A patent/CN114094287A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005158264A (en) * | 2003-09-04 | 2005-06-16 | Nissan Motor Co Ltd | Bipolar battery |
| CN106159344A (en) * | 2016-09-19 | 2016-11-23 | 中国电子科技集团公司第十八研究所 | Method for preventing tab of flexible package lithium battery from short circuit |
| CN106935784A (en) * | 2017-03-20 | 2017-07-07 | 四川恩莱极电子科技有限公司 | A kind of lithium battery pole ear surface treatment method |
| CN207781726U (en) * | 2018-01-17 | 2018-08-28 | 东莞市黄城河电子科技有限公司 | A kind of lug that welding is firm |
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