CN110311174A - A kind of spill coiling type lithium battery and preparation method thereof - Google Patents
A kind of spill coiling type lithium battery and preparation method thereof Download PDFInfo
- Publication number
- CN110311174A CN110311174A CN201910597109.0A CN201910597109A CN110311174A CN 110311174 A CN110311174 A CN 110311174A CN 201910597109 A CN201910597109 A CN 201910597109A CN 110311174 A CN110311174 A CN 110311174A
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- Prior art keywords
- notch
- lithium battery
- positive plate
- length
- negative electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 95
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000002985 plastic film Substances 0.000 claims abstract description 32
- 239000011247 coating layer Substances 0.000 claims abstract description 22
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 14
- 238000000465 moulding Methods 0.000 claims abstract description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000012856 packing Methods 0.000 claims abstract description 10
- 229920006255 plastic film Polymers 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 238000004804 winding Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The present invention provides a kind of spill coiling type lithium batteries and preparation method thereof, lithium battery further includes the plastic sheet of cuboid, the first notch is provided along its length on at least side coating layer of the positive plate of lithium battery, the second notch is provided along its length on at least side coating layer of the negative electrode tab of lithium battery, second notch is arranged along the width direction of negative electrode tab, and its width is equal with the first notch, after lithium battery coiling and molding, first notch and the second notch are overlapped along the thickness direction of lithium battery to be arranged, plastic sheet side is bonded with outer packing aluminum plastic film, its other side inwardly squeezes positive plate from the first notch on the outermost side or the second notch, negative electrode tab and diaphragm are simultaneously embedded in positive plate, in negative electrode tab and diaphragm, to form a rectangular recess in the side of lithium battery.The present invention, which provides, a kind of meets client to the spill coiling type lithium battery and preparation method thereof of placing battery protection board soft arranging wire demand in electronic equipment.
Description
Technical field
The present invention relates to field of lithium.It is more particularly related to a kind of spill coiling type lithium battery and its system
Preparation Method.
Background technique
Currently, most commonly used battery is winding battery and lithium battery, lithium battery is a kind of is by lithium metal or lithium alloy
Negative electrode material, the battery using non-aqueous electrolytic solution.Winding battery is formed with the lithium battery of winding method combination forming
Battery, be usually that diaphragm is set between positive plate and negative electrode tab, and by three's coiling and molding.Winding battery and lithium battery
It compares, the free electricity of winding battery high-rate discharge capacity with super strength, the ability to work under good partial state of charge, nothing
Solve liquid, can any direction to place work, firm in structure and shock resistance strong, be widely used in vehicle launch, car emergency power supply,
Generator starting, hybrid-electric car, solar energy storage wait for field.Therefore the research of coiling type lithium battery always is scientist
The heat subject of research.
Variation of the client to placing battery protection board soft arranging wire demand in electronic equipment at present, needs in coiling type lithium battery
On reserve gap for battery protecting plate soft arranging wire, and the surface of existing coiling type lithium battery is all smooth.
Summary of the invention
Meet client to placing battery protection board soft arranging wire demand in electronic equipment the object of the present invention is to provide a kind of
Spill coiling type lithium battery and preparation method thereof.
In order to realize these purposes and other advantages according to the present invention, a kind of spill coiling type lithium battery is provided, also
Plastic sheet including cuboid is provided along its length at least on at least side coating layer of the positive plate of the lithium battery
First notch of one rectangle, first notch are arranged along the width direction of the positive plate, and its length and the wide and modeling
The length of tablet and wide difference are equal, are provided along its length at least on at least side coating layer of the negative electrode tab of the lithium battery
Second notch of one rectangle, second notch is arranged along the width direction of the negative electrode tab, and its width and described first
Notch is equal, after the lithium battery coiling and molding, the thickness direction pair of first notch and the second notch along the lithium battery
It should be overlapped, the plastic sheet is arranged along the width direction of the positive plate, and one side is bonded with outer packing aluminum plastic film, the other side
The positive plate, negative electrode tab and diaphragm are inwardly squeezed from first notch on the outermost side or the second notch and are embedded in institute
It states in positive plate, negative electrode tab and diaphragm, to form a rectangular recess in the side of the lithium battery.
Preferably, in a kind of spill coiling type lithium battery, the two sides coating layer of the positive plate of the lithium battery
On be provided along its length the first notch of at least one rectangle.
Preferably, in a kind of spill coiling type lithium battery, the two sides coating layer of the negative electrode tab of the lithium battery
On be provided along its length the second notch of at least one rectangle.
Preferably, in a kind of spill coiling type lithium battery, the rectangular recess is located at the lithium battery side
Middle part.
Preferably, in a kind of spill coiling type lithium battery, the number of first notch and the second notch
Be 2-3.
The present invention also provides a kind of preparation methods of above-mentioned spill coiling type lithium battery, comprising the following steps:
When S1, positive electrode coating, the of at least one rectangle is provided along its length on its at least side coating layer
One notch, the first notch are arranged along the width direction of positive plate, and its length and width and the length and width of plastic sheet are distinguished
It is equal；
When S2, negative electrode coating, the of at least one rectangle is provided along its length on its at least side coating layer
Two notches, the second notch are arranged along the width direction of positive plate, and its length and width and the length and width of plastic sheet are distinguished
It is equal；
S3, the positive plate of the lithium battery, negative electrode tab and membrane winding are formed, after coiling and molding, described first is lacked
Mouth and the second notch are overlapped along the thickness direction of the lithium battery；
S4, the width direction by the plastic sheet of cuboid along the positive plate are arranged, one side and outer packing aluminum plastic film
Fitting, the other side from first notch on the outermost side or the second notch inwardly squeeze the positive plate, negative electrode tab and
Diaphragm, and be embedded in the positive plate, negative electrode tab and diaphragm, to form a rectangular recess in the side of the lithium battery.
There are grooves in the side of lithium battery for spill coiling type lithium battery of the invention, meet in consumer electronics device and place
Battery protecting plate soft arranging wire demand improves battery storage capacity so that battery compartment size be avoided to increase；It is existing simultaneously when its production
Equipment can be produced, without additional new equipment.
Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of spill coiling type lithium battery of the present invention；
Fig. 2 is the top view of spill coiling type lithium battery of the present invention；
Fig. 3 is the structural schematic diagram of positive electrode of the present invention；
Fig. 4 is the structural schematic diagram of negative electrode of the present invention；
The connection schematic diagram of positive electrode negative electrode when Fig. 5 is winding of the present invention.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
It should be noted that in the description of the present invention, term " transverse direction ", " longitudinal direction ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, and is not the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to limit of the invention
System.
As Figure 1-Figure 5, the embodiment of the present invention provides a kind of spill coiling type lithium battery, further includes cuboid
Plastic sheet 1 is provided along its length the of at least one rectangle on at least side coating layer of the positive plate 2 of the lithium battery
One notch 3, first notch 3 are arranged along the width direction of the positive plate 2, and its length and the wide and plastic sheet 1 length
It is equal respectively with width, at least one square is provided along its length on at least side coating layer of the negative electrode tab 4 of the lithium battery
Second notch 5 of shape, second notch 5 is arranged along the width direction of the negative electrode tab 4, and its width and first notch
3 is equal, and after the lithium battery coiling and molding, first notch 3 and the second notch 5 are corresponding along the thickness direction of the lithium battery
It is overlapped, the plastic sheet 1 is arranged along the width direction of the positive plate 2, and one side is bonded with outer packing aluminum plastic film, the other side
The positive plate 2, negative electrode tab 4 and diaphragm 6 and embedding are inwardly squeezed from first notch 3 on the outermost side or the second notch 5
It is located in the positive plate 2, negative electrode tab 4 and diaphragm 6, to form a rectangular recess 7 in the side of the lithium battery.
In the embodiment, by be provided along its length on at least side coating layer of the positive plate 2 in lithium battery to
Lack the first notch 3 of a rectangle, is provided along its length at least one on at least side coating layer of the negative electrode tab 4 of lithium battery
Second notch 5 of a rectangle, the first notch 3 is identical with the size of the second notch 5, after lithium battery coiling and molding, 3 He of the first notch
Second notch 5 is overlapped setting along the thickness direction of lithium battery, in this way after positive plate 2, negative electrode tab 4 and diaphragm 6 winding, so that it may
Under the premise of not influencing lithium battery global shape, position where being lacked in the first notch 3 and second, with plastic sheet 1 from being located at
Outermost first notch 3 or the second notch 5 inwardly squeeze positive plate 2, negative electrode tab 4 and diaphragm 6, form an appearance in the position
Receive the rectangular notch of plastic sheet 1, and the width direction by plastic sheet 1 along the positive plate 2 is arranged, one side and outer packing plastic-aluminum
Film fitting, the other side are embedded in rectangular notch, then wrap up lithium battery, obtained spill coiling lithium with outer packing aluminum plastic film
In finished battery, one side forms a rectangular recess 7, which can meet client's placing battery in electronic equipment
Demand when protection board soft arranging wire.
Preferably as another embodiment of the present invention, in a kind of spill coiling type lithium battery, described first
It is the number of notch 3 and the second notch 5 and a for 2-3, on the two sides coating layer of the positive plate 2 of lithium battery along its length
The first notch 3 equipped at least one rectangle is set along its length on the two sides coating layer of the negative electrode tab 4 of the lithium battery
There is the second notch 5 of at least one rectangle.
In the embodiment, the number of the first notch 3 and the second notch 5 and a for 2-3, that is, can guarantee can be by plastic sheet
1 is embedded in rectangular notch, to form a rectangle in wound spill lithium battery side after packaging aluminum plastic film package lithium battery outside
Groove 7.
Preferably as another embodiment of the present invention, in a kind of spill coiling type lithium battery, the rectangle
Groove 7 is located at the middle part of the lithium battery side.
In the embodiment, rectangular recess 7 is located at the middle part of lithium battery side, is located at the two of lithium battery side relative to groove
Side easily facilitates the placing battery protection board soft arranging wire in the rectangular recess 7.
The present invention also provides a kind of preparation methods of above-mentioned spill coiling type lithium battery, comprising the following steps:
When S1, positive electrode coating, the of at least one rectangle is provided along its length on its at least side coating layer
One notch 3, the first notch 3 is arranged along the width direction of positive plate 2, and the length and width of its length and width and plastic sheet 1
It is equal respectively；
When S2, negative electrode coating, the of at least one rectangle is provided along its length on its at least side coating layer
Two notches 5, the second notch 5 is arranged along the width direction of positive plate 2, and the length and width of its length and width and plastic sheet 1
It is equal respectively；
S3, by 6 coiling and molding of the positive plate 2 of the lithium battery, negative electrode tab 4 and diaphragm, after coiling and molding, described first
Notch 3 and the second notch 5 are overlapped along the thickness direction of the lithium battery；
S4, the width direction by the plastic sheet 1 of cuboid along the positive plate 2 are arranged, one side and outer packing plastic-aluminum
Film fitting, the other side inwardly squeezes the positive plate 2, cathode from first notch 3 on the outermost side or the second notch 5
Piece 4 and diaphragm 6 are simultaneously embedded in the positive plate 2, negative electrode tab 4 and diaphragm 6, to form a rectangle in the side of the lithium battery
Groove 7, then successively bound, fluid injection, chemical conversion, molding and test the step of.
In the embodiment, the preparation method of spill coiling type lithium battery the following steps are included:
1 is guaranteeing thickness≤1.5mm, width≤45mm, height≤45mm lithium battery size, nominal lithium battery 3.8V range
It is interior, ultra-thin lithium cell energy density >=375Wh/L；It is fabricated using following raw material:
1. positive pole aluminium foil is with a thickness of 10um
2. cathode aluminum foil thickness is 6um；
3. diaphragm 6 adds glue diaphragm 6 with a thickness of 5+3um ceramics；
4. positive and negative anodes tab uses with a thickness of 0.06mm aluminium, nickel tab；
5. outer packing aluminum plastic film is 0.076mm relief printing plate aluminum plastic film；
2 under the conditions of not changing existing lithium battery manufacture equipment, and the coating of positive/negative plate 4 uses 2~3 gaps coating side
Formula forms groove in 4 thickness direction of positive/negative plate, and gap width is respectively 9/12mm；Pole piece schematic diagram is shown in attached drawing one.
3 groove gap positive/negative plates 4 form reserved gravure position in core inner width middle position by winding method
It sets；
4 are encapsulated by normal soft package lithium battery process flow top side seal, fluid injection；
5 use the perpendicular patch of thickness 0.35mm* width 8mmPET sheet width align center in lithium battery front face surface；It is detailed in attached
Fig. 2
6, which charge to ultra-thin spill lithium battery using high temperature and pressure formation device, is formed；Make 0.35mm* width 8mm's
PET thin slice is embedded in reserved gravure position, forms the gravure of depth 0.3mm* wide 8mm on lithium battery surface；
Process after 7 warps, ultimately forms spill finished product lithium battery.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and embodiment shown and described herein.
Claims (6)
1. a kind of spill coiling type lithium battery, which is characterized in that it further include the plastic sheet (1) of cuboid, the lithium battery
It is provided along its length the first notch (3) of at least one rectangle on at least side coating layer of positive plate (2), described first
Notch (3) is arranged along the width direction of the positive plate (2), and its length and wide length and wide phase respectively with the plastic sheet (1)
Deng being provided along its length the second of at least one rectangle on at least side coating layer of the negative electrode tab (4) of the lithium battery
Notch (5), second notch (5) is arranged along the width direction of the negative electrode tab (4), and its width and first notch
(3) equal, after the lithium battery coiling and molding, first notch (3) and the second notch (5) are along the thickness side of the lithium battery
It is overlapped to corresponding, the plastic sheet (1) is arranged along the width direction of the positive plate (2), and one side and outer packing aluminum plastic film paste
It closes, the other side inwardly squeezes the positive plate (2) from first notch (3) on the outermost side or the second notch (5), bears
Pole piece (4) and diaphragm (6) are simultaneously embedded in the positive plate (2), negative electrode tab (4) and diaphragm (6), the one of the lithium battery
Side forms a rectangular recess (7).
2. a kind of spill coiling type lithium battery as described in claim 1, which is characterized in that the positive plate (2) of the lithium battery
Two sides coating layer on be provided along its length the first notch (3) of at least one rectangle.
3. a kind of spill coiling type lithium battery as described in claim 1, which is characterized in that the negative electrode tab (4) of the lithium battery
Two sides coating layer on be provided along its length the second notch (5) of at least one rectangle.
4. a kind of spill coiling type lithium battery as described in any one of claims 1-3, which is characterized in that the rectangular recess
(7) it is located at the middle part of the lithium battery side.
5. a kind of spill coiling type lithium battery as described in any one of claims 1-3, which is characterized in that first notch
(3) and the number of the second notch (5) and be 2-3.
6. a kind of preparation method of spill coiling type lithium battery as described in any one in claim 1-5, which is characterized in that including
Following steps:
When S1, positive electrode coating, first that at least one rectangle is provided along its length on its at least side coating layer is lacked
Mouthful (3), the first notch (3) are arranged along the width direction of positive plate (2), and the length of its length and width and plastic sheet (1) and
Width difference is equal；
When S2, negative electrode coating, second that at least one rectangle is provided along its length on its at least side coating layer is lacked
Mouthful (5), the second notch (5) are arranged along the width direction of positive plate (2), and the length of its length and width and plastic sheet (1) and
Width difference is equal；
S3, by the positive plate (2) of the lithium battery, negative electrode tab (4) and diaphragm (6) coiling and molding, after coiling and molding, described
One notch (3) and the second notch (5) are overlapped along the thickness direction of the lithium battery；
S4, the width direction by the plastic sheet (1) of cuboid along the positive plate (2) are arranged, one side and outer packing plastic-aluminum
Film fitting, the other side inwardly squeezes the positive plate from first notch (3) on the outermost side or the second notch (5)
(2), negative electrode tab (4) and diaphragm (6), and be embedded in the positive plate (2), negative electrode tab (4) and diaphragm (6), in the lithium
The side of battery forms a rectangular recess (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910597109.0A CN110311174A (en) | 2019-07-04 | 2019-07-04 | A kind of spill coiling type lithium battery and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910597109.0A CN110311174A (en) | 2019-07-04 | 2019-07-04 | A kind of spill coiling type lithium battery and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110311174A true CN110311174A (en) | 2019-10-08 |
Family
ID=68079075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910597109.0A Pending CN110311174A (en) | 2019-07-04 | 2019-07-04 | A kind of spill coiling type lithium battery and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110311174A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004014395A (en) * | 2002-06-10 | 2004-01-15 | Matsushita Electric Ind Co Ltd | Battery |
| 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 |
| CN210052808U (en) * | 2019-07-04 | 2020-02-11 | 深圳瑞隆新能源科技有限公司 | Concave winding type lithium battery |
-
2019
- 2019-07-04 CN CN201910597109.0A patent/CN110311174A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004014395A (en) * | 2002-06-10 | 2004-01-15 | Matsushita Electric Ind Co Ltd | Battery |
| 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 |
| CN210052808U (en) * | 2019-07-04 | 2020-02-11 | 深圳瑞隆新能源科技有限公司 | Concave winding type lithium battery |
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