CN2872606Y - Coiling lithium-ion battery unit and lithium-ion battery thereof - Google Patents
Coiling lithium-ion battery unit and lithium-ion battery thereof Download PDFInfo
- Publication number
- CN2872606Y CN2872606Y CNU2005200364076U CN200520036407U CN2872606Y CN 2872606 Y CN2872606 Y CN 2872606Y CN U2005200364076 U CNU2005200364076 U CN U2005200364076U CN 200520036407 U CN200520036407 U CN 200520036407U CN 2872606 Y CN2872606 Y CN 2872606Y
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- collector
- coating area
- bar
- cuts
- plate
- 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.)
- Expired - Lifetime
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 41
- 239000011248 coating agent Substances 0.000 claims description 67
- 238000000576 coating method Methods 0.000 claims description 67
- 230000004888 barrier function Effects 0.000 claims description 15
- 239000007773 negative electrode material Substances 0.000 claims description 13
- 239000007774 positive electrode material Substances 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 239000002390 adhesive tape Substances 0.000 claims description 6
- 239000013543 active substance Substances 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 210000000481 breast Anatomy 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a coiled lithium ion battery cell formed from a positive pole piece, a separator and a negative pole piece by coiling; the positive/negative pole piece comprises a current collector, a positive/negative pole ear, and positive electrode active substance; current collector of the positive/negative pole piece comprises at least one positive/negative pole piece non-coated region provided with a positive/negative pole ear which is formed by transversely cutting the non-coated region into long thin strips and folding the strips upwards, and the positive/negative pole piece non-coated region is disposed in the intermediate region outside two ends of the current collector. Due to integrated positive/negative pole ear and current collector, the utility model has small resistance and good uniformity during thermal expansion, suppresses interior stress and distortion, and avoids potential safety hazard.
Description
Technical field
The utility model relates to the lithium secondary battery field, is specifically related to the coiled lithium ion battery unit, also relates to lithium ion battery.
Background technology
In view of lithium secondary battery because of its operating voltage height, that Unit Weight gets energy density is fabulous, therefore this battery development is very fast, and secondary cell has been widely used in mobile products such as MP3, MP4, PDA(Personal Digital Assistant), mobile phone, digital camera, electric tool, toy.Lithium ion battery comprises pole piece, barrier film, electrolyte and shell; Wherein pole piece comprises positive plate, negative plate, and positive plate comprises positive electrode current collector and is coated in positive electrode current collector two lip-deep positive electrode materials.Anode ear combines with the part that is not coated with positive electrode material of positive electrode plate.Positive electrode current collector and anode ear are all made of aluminum.Negative plate comprises the negative electrode collector and is coated in two lip-deep negative electrode materials of negative electrode collector.Negative electrode lug combines with the part that is not coated with negative electrode material of negative electrode collector.The negative electrode collector is made by Copper Foil, and negative electrode lug is made by nickel.
The negative electrode lug that nickel strap is made is not coated with the zone by ultra-sonic welded or riveted joint with Copper Foil and is connected.So, owing to negative electrode lug, negative current collector are made by different metal, in charging and discharge process, be easy to generate distortion, reduced battery security.In addition, adopt different metal also can increase internal resistance.
The resistance of the join domain of the welding of anode ear and plus plate current-collecting body, negative electrode lug and negative current collector or riveted joint formation is bigger in addition.
So, publication number is that CN1531133A discloses and a kind ofly cuts the method for collector as lug at the pole piece end, it has solved the problems referred to above, but owing to positive/negative plate, barrier film are wound into battery unit, so the lug of its formation is in the bosom or the outermost layer of battery unit.The initial position of the coiling of battery unit be easy to generate most reel bad, have a potential safety hazard; The outermost layer of battery unit is also misplaced by the shell scratch easily when battery assembles and stays potential safety hazard.
Summary of the invention
The purpose of this utility model is exactly in order to overcome the above problems, and provides a kind of security performance good coiled lithium ion battery unit.
Another object of the present invention provides the good lithium ion battery of a kind of security performance.
For achieving the above object, the utility model has adopted following technical scheme:
The utility model discloses a kind of coiled lithium ion battery unit, comprise positive plate, barrier film and negative plate, isolate by barrier film between positive plate and the negative plate and be wound as one; Described positive plate comprises first collector, anode ear and the positive active material that is coated at least one surface of first collector; Described negative plate comprises second collector, negative electrode lug and the negative electrode active material that is coated at least one surface of second collector;
Comprise the non-coating area of at least one positive plate on first collector of described positive plate, the non-coating area of described positive plate is meant the zone of uncoated positive active material on first collector, the non-coating area of described positive plate is provided with an anode ear, this anode ear is to cut bar with first after elongated shape first cuts bar and upwards be folded to form by laterally cutting at the non-coating area of positive plate to form, this first cuts the upwards folding back of bar end and protrudes in first collector, and the non-coating area of described positive plate is positioned at the zone line beyond the first collector two ends; And/or comprise the non-coating area of at least one negative plate on second collector of described negative plate, the non-coating area of described negative plate is meant the zone of uncoated negative electrode active material on second collector, the non-coating area of described negative plate is provided with a negative electrode lug, this negative electrode lug is to cut bar with second after elongated shape second cuts bar and upwards be folded to form by laterally cutting at the non-coating area of negative plate to form, this second cuts the upwards folding back of bar end and protrudes in second collector, and the non-coating area of described negative plate is positioned at the zone line beyond the second collector two ends.
In the non-coating area of described positive plate, first first collector that cuts bar and top, the first collector junction is provided with at least one slit, and first cuts bar passes this slit, and the upwards folding end that makes protrudes in first collector formation anode ear; And/or
In the non-coating area of described negative plate, second second collector that cuts bar and top, the second collector junction is provided with at least one slit, and second cuts bar passes this slit, and the upwards folding end that makes protrudes in second collector formation negative electrode lug.
Described first cuts the breach that forms after bar cuts is positioned at positive plate non-coating area inside and is close-shaped; And/or described second cut bar and cut breach that the back forms to be positioned at the non-coating area of negative plate inner and be close-shaped.
Further, first cut bar and/or second and cut cutting of bar and also be provided with adhesive tape with burst.
The invention also discloses a kind of lithium ion battery, the coiled lithium ion battery unit that this lithium ion battery comprises housing and is positioned at housing, described coiled lithium ion battery unit comprises positive plate, barrier film and negative plate, isolates by barrier film between positive plate and the negative plate and is wound as one; Described positive plate comprises first collector, anode ear and the positive active material that is coated at least one surface of first collector; Described negative plate comprises second collector, negative electrode lug and the negative electrode active material that is coated at least one surface of second collector;
Comprise the non-coating area of at least one positive plate on first collector of described positive plate, the non-coating area of described positive plate is meant the zone of uncoated positive active material on first collector, the non-coating area of described positive plate is provided with an anode ear, this anode ear is laterally to cut by first collector with the non-coating area of positive plate to form elongated shape first and cut and cut bar with first behind the bar and upwards be folded to form, this first cuts the upwards folding back first of bar and cuts the bar end and protrude in first collector, and the non-coating area of described positive plate is positioned at the zone line beyond the first collector two ends; And/or comprise the non-coating area of at least one negative plate on second collector of described negative plate, the non-coating area of described negative plate is meant the zone of uncoated negative electrode active material on second collector, the non-coating area of described negative plate is provided with a negative electrode lug, this negative electrode lug is laterally to cut by second collector with the non-coating area of negative plate to form elongated shape second and cut and cut bar with second behind the bar and upwards be folded to form, this second cuts the upwards folding back second of bar and cuts the bar end and protrude in second collector, and the non-coating area of described negative plate is positioned at the zone line beyond the second collector two ends.
Because adopted above scheme, the beneficial effect that the utility model is possessed is:
Coiled lithium ion battery unit and lithium ion battery that the utility model provides, anode ear wherein, negative electrode lug and collector are one, need not welding or riveted joint, so resistance is little, and high conformity during thermal expansion simultaneously can not produce internal stress and distortion; And because non-coating area of positive plate or the non-coating area of negative plate are arranged on collector two ends zone line in addition separately, solve the problem that the coiling that is easy to generate when positive and negative lug in the positive and negative plate non-coating area is positioned at the battery unit bosom is bad and scratched dislocation when being positioned at the battery unit outermost layer easily by shell, eliminated potential safety hazard.
In the non-coating area of positive and negative plate, cut bar and collector junction the top collector on slit is set, and make to cut and pass this slit when bar upwards is folded to form positive and negative lug, can solve because the outer problem of sticking up in the folding back of bar that cuts that the effect of elastic properties of materials causes, the positive and negative lug that folding back is formed is close to collector, is convenient to pole piece and membrane coil around forming battery unit.
Cut bar and cut formation, can not form breach, significantly reduced that collector is cutting the place by the danger of tear fracture in the winding process at the edge of collector from the collector inner transverse of the non-coating area of positive and negative plate.
Cut cutting of bar and be provided with adhesive tape with burst, can either fixed fold cut bar, can play the effect of insulation again, simultaneously, also eliminated folding bar causes short circuit to the wearing and tearing of barrier film the potential safety hazard that cuts.
Description of drawings
Fig. 1 is the structural representation of the positive plate of a kind of coiled lithium ion battery of the present utility model unit.
Fig. 2 is the A-A cutaway view of Fig. 1.
Fig. 3 is positive plate, the barrier film of a kind of coiled lithium ion battery of the present utility model unit, the structural representation of negative plate.
Fig. 4 is a kind of coiled lithium ion battery cellular construction schematic diagram of the present utility model.
Fig. 5 is the positive plate structural representation of another kind of coiled lithium ion battery of the present utility model unit;
Fig. 6 is positive plate, the barrier film of another kind of coiled lithium ion battery of the present utility model unit, the structural representation of negative plate.
Fig. 7 is a kind of lithium ion battery structure schematic diagram of the present utility model.
Embodiment
Also in conjunction with the accompanying drawings the utility model is described in further detail below by specific embodiment.
Embodiment 1
See Fig. 1 to Fig. 4.
A kind of coiled lithium ion battery unit comprises positive plate, barrier film 12, negative plate, isolates by barrier film between positive plate and the negative plate and is wound as one, as shown in Figure 3 and Figure 4; Wherein, described positive plate comprises first collector 1, anode ear 4 and is coated in the positive active material 2 and the positive active material 3 on 1 two surfaces of first collector respectively; Described negative plate comprises second collector 8, negative electrode lug 11 and is coated in the negative electrode active material 9 and negative electrode active material 10 on 8 two surfaces of second collector respectively.
As shown in Figure 1 and Figure 2, comprise a non-coating area 6 of positive plate on first collector 1 of positive plate, the non-coating area 6 of this positive plate is meant the zone of uncoated positive active material 2 on first collector 1 and 3, and the non-coating area 6 of this positive pole is positioned at the zone line beyond first collector, 1 two ends.Anode ear 4 is to form elongated shape first and cut behind the bar and to cut bar with first to pass slit 5 upwards folding and make end protrude in first collector 1 to form by non-coating area 6 inner transverse of positive plate are cut, and cutting breach that the back forms, to be positioned at the non-coating area of positive plate 6 inner and be closed elongated shape.
Identical with the situation of positive plate and anode ear, comprise a non-coating area of negative plate on second collector 8 of negative plate, the non-coating area of this positive plate is meant the zone of uncoated negative electrode active material 9 on second collector 8 and 10, and the non-coating area of this negative pole is positioned at the zone line beyond second collector, 8 two ends.Negative electrode lug 11 is to form elongated shape second and cut behind the bar and to cut bar with second to pass slit upwards folding and make end protrude in second collector 8 to form by the non-coating area inner transverse of negative plate is cut, and cutting breach that the back forms, to be positioned at the non-coating area of negative plate inner and be closed elongated shape.
A kind of coiled lithium ion battery unit, except this coiled lithium ion battery unit before reeling, anode ear 4 cuts with the burst two sides and all is pasted with adhesive tape 7, negative electrode lug 11 cuts and the burst two sides equally all is pasted with beyond the adhesive tape, all the other structures are with identical described in the embodiment 1, shown in Fig. 5,6.
A kind of lithium ion battery as shown in Figure 7, comprises the coiled lithium ion battery unit 14 that housing 13, cover plate 15 and embodiment 1 or embodiment 2 provide; Anode ear 4, negative electrode lug 11 on the coiled lithium ion battery unit 14 are welded on the cover plate 15, and then housing 13 is put in coiled lithium ion battery unit 14, cover with cover plate 15 again, last fluid injection and by laser welding, steel ball shutoff sealing.
Claims (8)
1, coiled lithium ion battery unit comprises positive plate, barrier film and negative plate, isolates by barrier film between positive plate and the negative plate and is wound as one;
Described positive plate comprises first collector, anode ear and the positive active material that is coated at least one surface of first collector;
Described negative plate comprises second collector, negative electrode lug and the negative electrode active material that is coated at least one surface of second collector, it is characterized in that:
Comprise the non-coating area of at least one positive plate on first collector of described positive plate, the non-coating area of described positive plate is meant the zone of uncoated positive active material on first collector, the non-coating area of described positive plate is provided with an anode ear, this anode ear is to cut bar with first after elongated shape first cuts bar and upwards be folded to form by laterally cutting at the non-coating area of positive plate to form, this first cuts the upwards folding back of bar end and protrudes in first collector, and the non-coating area of described positive plate is positioned at the zone line beyond the first collector two ends; And/or
Comprise the non-coating area of at least one negative plate on second collector of described negative plate, the non-coating area of described negative plate is meant the zone of uncoated negative electrode active material on second collector, the non-coating area of described negative plate is provided with a negative electrode lug, this negative electrode lug is to cut bar with second after elongated shape second cuts bar and upwards be folded to form by laterally cutting at the non-coating area of negative plate to form, this second cuts the upwards folding back of bar end and protrudes in second collector, and the non-coating area of described negative plate is positioned at the zone line beyond the second collector two ends.
2, coiled lithium ion battery according to claim 1 unit, it is characterized in that: in the non-coating area of described positive plate, first first collector that cuts bar and top, the first collector junction is provided with at least one slit, first cuts bar passes this slit, and the upwards folding end that makes protrudes in first collector formation anode ear; And/or
In the non-coating area of described negative plate, second second collector that cuts bar and top, the second collector junction is provided with at least one slit, and second cuts bar passes this slit, and the upwards folding end that makes protrudes in second collector formation negative electrode lug.
3, coiled lithium ion battery according to claim 1 unit is characterized in that: described first cuts bar cuts breach that the back forms to be positioned at the non-coating area of positive plate inner and be close-shaped; And/or described second cut bar and cut breach that the back forms to be positioned at the non-coating area of negative plate inner and be close-shaped.
4, according to the arbitrary described coiled lithium ion battery of claim 1～3 unit, it is characterized in that: first cuts bar and/or second cuts cutting with burst of bar and also is provided with adhesive tape.
5, a kind of lithium ion battery, the coiled lithium ion battery unit that this lithium ion battery comprises housing and is positioned at housing, described coiled lithium ion battery unit comprises positive plate, barrier film and negative plate, isolates by barrier film between positive plate and the negative plate and is wound as one;
Described positive plate comprises first collector, anode ear and the positive active material that is coated at least one surface of first collector;
Described negative plate comprises second collector, negative electrode lug and the negative electrode active material that is coated at least one surface of second collector, it is characterized in that:
Comprise the non-coating area of at least one positive plate on first collector of described positive plate, the non-coating area of described positive plate is meant the zone of uncoated positive active material on first collector, the non-coating area of described positive plate is provided with an anode ear, this anode ear is to cut bar with first after elongated shape first cuts bar and upwards be folded to form by laterally cutting at the non-coating area of positive plate to form, this first cuts the upwards folding back of bar end and protrudes in first collector, and the non-coating area of described positive plate is positioned at the zone line beyond the first collector two ends; And/or
Comprise the non-coating area of at least one negative plate on second collector of described negative plate, the non-coating area of described negative plate is meant the zone of uncoated negative electrode active material on second collector, the non-coating area of described negative plate is provided with a negative electrode lug, this negative electrode lug is to cut bar with second after elongated shape second cuts bar and upwards be folded to form by laterally cutting at the non-coating area of negative plate to form, this second cuts the upwards folding back of bar end and protrudes in second collector, and the non-coating area of described negative plate is positioned at the zone line beyond the second collector two ends.
6, a kind of lithium ion battery according to claim 5, it is characterized in that: in the non-coating area of described positive plate, first first collector that cuts bar and top, the first collector junction is provided with at least one slit, first cuts bar passes this slit, and the upwards folding end that makes protrudes in first collector formation anode ear; And/or
In the non-coating area of described negative plate, second second collector that cuts bar and top, the second collector junction is provided with at least one slit, and second cuts bar passes this slit, and the upwards folding end that makes protrudes in second collector formation negative electrode lug.
7, a kind of lithium ion battery according to claim 5 is characterized in that: described first cuts the breach that forms after bar cuts is positioned at positive plate non-coating area inside and is close-shaped; And/or described second cut bar and cut breach that the back forms to be positioned at the non-coating area of negative plate inner and be close-shaped.
8, according to the arbitrary described a kind of lithium ion battery of claim 5～7, it is characterized in that: described first cuts bar and/or second cuts cutting with burst of bar and also is provided with adhesive tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200364076U CN2872606Y (en) | 2005-12-01 | 2005-12-01 | Coiling lithium-ion battery unit and lithium-ion battery thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200364076U CN2872606Y (en) | 2005-12-01 | 2005-12-01 | Coiling lithium-ion battery unit and lithium-ion battery thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2872606Y true CN2872606Y (en) | 2007-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200364076U Expired - Lifetime CN2872606Y (en) | 2005-12-01 | 2005-12-01 | Coiling lithium-ion battery unit and lithium-ion battery thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN2872606Y (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103151562A (en) * | 2011-12-06 | 2013-06-12 | 北汽福田汽车股份有限公司 | Method for preparing lithium ion battery |
| CN103151555A (en) * | 2011-12-06 | 2013-06-12 | 北汽福田汽车股份有限公司 | Lithium ion battery |
| CN103688389A (en) * | 2011-07-20 | 2014-03-26 | 株式会社杰士汤浅国际 | Cylindrically shaped battery |
| CN105990611A (en) * | 2015-01-27 | 2016-10-05 | 深圳市比克电池有限公司 | Lithium ion battery wound core and manufacturing method of same |
| CN107020275A (en) * | 2015-06-26 | 2017-08-08 | 宁德时代新能源科技股份有限公司 | Method for directionally cleaning pole piece and application of pole piece in battery |
| WO2017173615A1 (en) * | 2016-04-07 | 2017-10-12 | 宁德新能源科技有限公司 | Pole piece, electric core and energy storage apparatus |
| CN112038705A (en) * | 2020-09-29 | 2020-12-04 | 合肥国轩高科动力能源有限公司 | Battery roll core forming method, battery roll core structure and pole piece structure |
| CN113066955A (en) * | 2021-03-11 | 2021-07-02 | 珠海冠宇电池股份有限公司 | Electrode plate and application thereof |
| CN113097439A (en) * | 2021-03-31 | 2021-07-09 | 珠海冠宇电池股份有限公司 | Pole piece and battery |
| CN113285055A (en) * | 2021-05-28 | 2021-08-20 | 珠海冠宇电池股份有限公司 | Electrode plate and application thereof |
| CN114079127A (en) * | 2020-08-11 | 2022-02-22 | 北京小米移动软件有限公司 | Battery pack and terminal |
| WO2022120651A1 (en) * | 2020-12-09 | 2022-06-16 | 宁德新能源科技有限公司 | Wound electrode assembly, electrochemical device, and electronic device |
| WO2022228580A1 (en) * | 2021-04-30 | 2022-11-03 | 珠海冠宇电池股份有限公司 | Electrode plate and preparation method therefor, and lithium-ion battery |
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2005
- 2005-12-01 CN CNU2005200364076U patent/CN2872606Y/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103688389A (en) * | 2011-07-20 | 2014-03-26 | 株式会社杰士汤浅国际 | Cylindrically shaped battery |
| CN103688389B (en) * | 2011-07-20 | 2016-09-28 | 株式会社杰士汤浅国际 | Cylindrical battery |
| CN103151555A (en) * | 2011-12-06 | 2013-06-12 | 北汽福田汽车股份有限公司 | Lithium ion battery |
| CN103151562A (en) * | 2011-12-06 | 2013-06-12 | 北汽福田汽车股份有限公司 | Method for preparing lithium ion battery |
| CN105990611A (en) * | 2015-01-27 | 2016-10-05 | 深圳市比克电池有限公司 | Lithium ion battery wound core and manufacturing method of same |
| CN107020275A (en) * | 2015-06-26 | 2017-08-08 | 宁德时代新能源科技股份有限公司 | Method for directionally cleaning pole piece and application of pole piece in battery |
| CN107020275B (en) * | 2015-06-26 | 2019-11-05 | 宁德时代新能源科技股份有限公司 | Method for directionally cleaning pole piece and application of pole piece in battery |
| US11145868B2 (en) | 2016-04-07 | 2021-10-12 | Ningde Amperex Technology Limited | Electrode piece, cell and energy storage device |
| WO2017173615A1 (en) * | 2016-04-07 | 2017-10-12 | 宁德新能源科技有限公司 | Pole piece, electric core and energy storage apparatus |
| CN108886170A (en) * | 2016-04-07 | 2018-11-23 | 宁德新能源科技有限公司 | Pole piece, battery core and energy storage device |
| CN108886170B (en) * | 2016-04-07 | 2021-12-10 | 宁德新能源科技有限公司 | Pole piece, battery cell and energy storage device |
| CN114079127A (en) * | 2020-08-11 | 2022-02-22 | 北京小米移动软件有限公司 | Battery pack and terminal |
| CN112038705A (en) * | 2020-09-29 | 2020-12-04 | 合肥国轩高科动力能源有限公司 | Battery roll core forming method, battery roll core structure and pole piece structure |
| WO2022120651A1 (en) * | 2020-12-09 | 2022-06-16 | 宁德新能源科技有限公司 | Wound electrode assembly, electrochemical device, and electronic device |
| CN113066955A (en) * | 2021-03-11 | 2021-07-02 | 珠海冠宇电池股份有限公司 | Electrode plate and application thereof |
| WO2022188864A1 (en) * | 2021-03-11 | 2022-09-15 | 珠海冠宇电池股份有限公司 | Electrode sheet and application thereof |
| CN113066955B (en) * | 2021-03-11 | 2024-02-13 | 珠海冠宇电池股份有限公司 | Electrode slice and application thereof |
| CN113097439A (en) * | 2021-03-31 | 2021-07-09 | 珠海冠宇电池股份有限公司 | Pole piece and battery |
| WO2022228580A1 (en) * | 2021-04-30 | 2022-11-03 | 珠海冠宇电池股份有限公司 | Electrode plate and preparation method therefor, and lithium-ion battery |
| CN113285055A (en) * | 2021-05-28 | 2021-08-20 | 珠海冠宇电池股份有限公司 | Electrode plate and application thereof |
| CN113285055B (en) * | 2021-05-28 | 2023-12-05 | 珠海冠宇电池股份有限公司 | Electrode slice and application thereof |
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