WO2017113999A1 - Batterie à structure d'enroulement - Google Patents

Batterie à structure d'enroulement Download PDF

Info

Publication number
WO2017113999A1
WO2017113999A1 PCT/CN2016/105421 CN2016105421W WO2017113999A1 WO 2017113999 A1 WO2017113999 A1 WO 2017113999A1 CN 2016105421 W CN2016105421 W CN 2016105421W WO 2017113999 A1 WO2017113999 A1 WO 2017113999A1
Authority
WO
WIPO (PCT)
Prior art keywords
pole piece
battery
groove
current collector
tab
Prior art date
Application number
PCT/CN2016/105421
Other languages
English (en)
Chinese (zh)
Inventor
李炳江
牛少军
Original Assignee
宁德新能源科技有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 宁德新能源科技有限公司 filed Critical 宁德新能源科技有限公司
Publication of WO2017113999A1 publication Critical patent/WO2017113999A1/fr

Links

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
    • H01M10/058—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
    • 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

Definitions

  • the utility model relates to the technical field of batteries, in particular to a battery with a winding structure.
  • the battery core of the conventional winding structure has a blank current collector at the beginning of the positive and negative pole pieces, and the positive electrode tab 5' and the negative electrode tab 6' are generally directly soldered to the positive and negative pole pieces.
  • ETS embedded tab structure
  • the MM structure of the battery has the following defects: 1) the mechanical symmetry of the battery core is poor, resulting in the battery core is more easily deformed during the cycle, the cycle expansion rate is larger; 2) the bonding area of the separator and the pole piece The decrease leads to a decrease in the hardness of the battery core and a low pass rate of the impact test.
  • the purpose of the present invention is to provide a battery with a wound structure in view of the deficiencies of the prior art. While increasing the energy density of the cell, the structure and design of the cell are optimized by adjusting the position of the tab embedded in the wound pole piece, thereby improving the problem of low hardness, easy deformation, poor symmetry of the cell, and improving the battery abuse test. Passing rate.
  • the present invention provides the following solutions:
  • a battery having a wound structure comprising: a first pole piece, a separator, and a second core piece electrically opposite to the first pole piece, which are sequentially stacked and wound in the same direction, and an electrolyte thereof, a pole piece includes a first current collector and a first active material layer attached to a surface of the first current collector, the second pole piece includes a second current collector and a second active material layer attached to the surface of the second current collector, a first groove is disposed on the first active material layer of the first pole piece, and a second groove is disposed on the second active material layer of the second pole piece, the first groove is located at the first pole of the winding a starting end of the sheet, the second groove is located at a beginning or a middle of the wound second pole piece, the first pole is embedded in the first groove and is electrically connected to the first current collector, the second ear Inlaid in the second groove and electrically connected to the second current collector.
  • the first pole piece is a positive pole piece or a negative pole piece
  • the second pole piece is a negative pole piece or a positive pole piece
  • the first pole is a positive pole or a negative pole
  • the first The second tab is a negative pole or a positive pole
  • the positive tab is an aluminum tab
  • the negative tab is a nickel tab.
  • the positive electrode tab or the negative electrode tab may be mounted on the first groove on the first pole piece or the second groove on the second pole piece by laser welding, resistance welding, and ultrasonic welding.
  • the utility model improves the symmetry of the battery core by adjusting the position of the positive and negative poles at the winding pole piece, reduces the loss of the energy density, and avoids the occurrence of the green glue in the same layer, thereby improving the stickiness of the battery core.
  • the knot can significantly improve the hardness of the cell.
  • the battery of the wound structure further includes a glue layer disposed on the surface of the first tab and covering the entire first groove and/or disposed on the second pole
  • the ear surface covers the entire second groove.
  • the glue layer mainly serves as insulation protection and fixing for the ear.
  • the adhesive layer is a hot melt adhesive layer or a green rubber layer.
  • a green rubber layer is attached to protect and fix the tabs, but at the same time, the bonding area between the pole pieces and the separator is reduced.
  • the hardness of the battery core causes the hardness of the battery core to be low.
  • hot melt adhesives are easy to melt under high temperature conditions, and have a good bonding effect between the separator and the pole piece, thereby improving the hardness of the battery core.
  • the area covered by the hot melt after melting is larger than the area of the glue.
  • the thickness a of the first tab is less than or equal to the depth b of the first recess, and the thickness c of the second tab is less than or equal to the depth d of the second recess. If the thickness of the tab is greater than the depth of the recess, the thickness of the battery is increased, resulting in a loss of energy density of the battery.
  • the length m of the first groove is smaller than the width n of the first pole piece
  • the length p of the second groove is smaller than the width q of the second pole piece.
  • the distance between the head and the tail of the second pole piece is defined as D1
  • the middle of the wound second pole piece is defined as d1
  • d1 It is in the range of 1/10D1 to 7/10D1 calculated from the head of the second pole piece.
  • the starting end of the wound first pole piece or the second pole piece is defined as w
  • w is the area between the first pole piece or the second pole piece head and the midpoint of the first winding bend.
  • the first groove is formed by removing the first active material layer by laser cleaning, mechanical cleaning or styrofoam cleaning to expose the first current collector.
  • the second groove is formed by removing the second active material layer by laser cleaning, mechanical cleaning or styrofoam cleaning to expose the second current collector.
  • the thickness of the hot melt adhesive layer or the green rubber layer is set to 5 to 50 ⁇ m.
  • the thickness of the adhesive layer is too thin to provide insulation and protection; the thickness of the adhesive layer is too thick, which may cause loss of energy density of the battery.
  • the utility model has the beneficial effects that: while increasing the energy density of the battery core, the structure and design of the battery core are optimized by adjusting the position of the pole embedded in the wound pole piece, thereby improving the hardness of the battery core, the deformation is easy, and the symmetry is poor. And other issues, improve the pass rate of battery abuse testing.
  • FIG. 1 is a schematic structural view of a battery of a conventional winding structure in the prior art.
  • FIG. 2 is a schematic structural view of a prior art embedded tab structure battery.
  • FIG. 3 is a schematic structural view of a battery of the winding structure of the present invention.
  • FIG. 4 is a second structural schematic view of the battery of the winding structure of the present invention.
  • FIG. 5 is a schematic structural view of the first pole in the first pole piece of the present invention.
  • Figure 6 is a cross-sectional view of the first pole in the first pole piece of the present invention.
  • Figure 7 is a cross-sectional view of the first pole in the first pole piece of the present invention.
  • Figure 8 is a schematic view showing the structure of the second pole in the second pole piece of the present invention.
  • Figure 9 is a cross-sectional view of the second pole in the second pole piece of the present invention.
  • Figure 10 is a cross-sectional view of the second pole in the second pole piece of the present invention.
  • a battery having a wound structure including a first pole piece 1, a separator 3, and a second pole piece 2 electrically opposite to the first pole piece 1 are sequentially stacked and wound in the same direction.
  • the starting end w of the wound first pole piece 1 is the area between the head of the first pole piece 1 and the midpoint of the first winding bend; the middle of the wound second pole piece 2 is defined as D1, in the unfolded state, the distance from the head to the tail of the second pole piece 2 is defined as D1, and d1 is in the range of 1/10D1 to 7/10D1 calculated from the head of the second pole piece 2.
  • the first groove 111 is formed by removing the first active material layer 11 by laser cleaning, mechanical cleaning, or styrofoam cleaning to expose the first current collector 12, and the second groove 211 is formed in the same manner.
  • the depth of the first groove 111 and the second groove 211 are both 0.1 mm
  • the first pole piece 1 is a positive pole piece
  • the second pole piece 2 is a negative pole piece
  • the first pole 5 is a positive pole.
  • the second tab 6 is a negative electrode tab
  • the thickness of the positive electrode tab and the negative electrode tab are both 0.1 mm
  • the thickness of the positive electrode tab and the negative electrode tab are both 0.5 mm.
  • the positive electrode tab is an aluminum tab
  • the negative electrode tab is a nickel tab.
  • the tab is also attached with a green glue layer, and the green glue layer 7 is disposed on the surface of the first tab 5 and covers the entire first groove 111 and the surface of the second tab 6 and covers the entire second groove 211.
  • the thickness of the green rubber layer is set to 10 ⁇ m, and the purpose of the green rubber layer is mainly to insulate and protect the tabs. Since the positive electrode tab is located at the center of the battery core 4, this improves the symmetry of the battery core 4 to a certain extent, and at the same time avoids the occurrence of the green rubber in the same layer, thus improving the adhesion of the battery core 4, and The hardness of the battery cell 4 can be significantly improved.
  • the above-mentioned battery cells were placed in a battery package, and 1 mol/L of LiPF 6 /(EC+PC+DEC) electrolyte was injected therein, wherein ethylene carbonate (EC), propylene carbonate (PC), and ethylene carbonate were injected.
  • the volume ratio of the ester (DEC) was 1:1:1; and the 616790 model (the thickness of the finished battery was 6.1 mm, the width was 67 mm, and the length was 90 mm) was obtained by the process of aging and aging.
  • the first groove 111 is located at the beginning end of the wound first pole piece 1
  • the second groove 211 is located at the beginning end of the wound second pole piece 2.
  • the starting end w of the wound second pole piece 2 is the area between the head of the second pole piece 2 and the midpoint of the first winding bend. Since both the positive electrode tab and the negative electrode tab are located at the center of the battery cell 4, the symmetry of the battery cell 4 is increased, the hardness is increased, and the loss of energy density is reduced.
  • the green rubber layer to which the first tab 5 and the second tab 6 are attached is replaced with a hot melt adhesive layer, and the thickness of the hot melt adhesive layer is set to 50 ⁇ m.
  • the replacement of the green rubber layer with the hot melt adhesive layer is because the hot melt adhesive is easily melted under high temperature conditions, and a good bonding effect is exerted between the separator 3 and the pole piece, thereby improving the hardness of the battery core 4.
  • a conventionally wound structure battery includes a positive electrode sheet, a separator, and a negative electrode sheet which are sequentially laminated and wound in the same direction, and an electrolyte thereof.
  • the initial ends of the positive and negative pole pieces are provided with a blank current collector
  • the positive electrode tab 5' is directly welded to the blank current collector of the positive electrode pole piece
  • the negative electrode tab 6' is directly welded to the blank current collector of the negative electrode pole piece.
  • the thickness of the positive electrode tab and the negative electrode tab are both 0.1 mm, and the thickness of the positive electrode tab and the negative electrode tab are both 0.5 mm.
  • the positive electrode tab is an aluminum tab
  • the negative electrode tab is a nickel tab
  • a green rubber layer having a thickness of 10 ⁇ m is attached to the solder joints of the positive and negative electrodes.
  • the above-mentioned battery cells were placed in a battery package, and 1 mol/L of LiPF 6 /(EC+PC+DEC) electrolyte was injected therein, wherein ethylene carbonate (EC), propylene carbonate (PC), and ethylene carbonate were injected.
  • the volume ratio of the ester (DEC) was 1:1:1; and the 616790 model (the thickness of the finished battery was 6.1 mm, the width was 67 mm, and the length was 90 mm) was obtained by the process of aging and aging.
  • the battery of the prior art embedded tab structure differs from Embodiment 1 in the position of the tabs, and the positive electrode tab 5' and the negative electrode tab 6' are both embedded in the wound core tab.
  • the middle part, the rest is the same as Embodiment 1, and will not be described again.
  • Embodiments 1 to 3 and Comparative Embodiments 1 to 2 were charged at a constant current of 0.5 C at a temperature of 25 ° C to 4.35 V, and then charged to 0.05 C at a constant voltage; then, 0.5 C was discharged to 3.0 V, and measured. The volumetric energy density of the battery at this time.
  • the utility model adopts the embedded core structure of the battery core, and can significantly improve the energy density of the battery under the same size;
  • the utility model optimizes the structure and design of the battery core by adjusting the position of the pole embedded in the wound pole piece, thereby improving the symmetry of the battery core, low hardness, easy deformation and the like.
  • the pass rate of its battery abuse test has increased significantly.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)

Abstract

L'invention concerne une batterie ayant une structure d'enroulement, se rapportant au domaine technique des batteries. La batterie comprend une cellule (4), formée par superposition successive d'une première pièce polaire (1), d'un film isolant (3) et d'une seconde pièce polaire (2) avec une propriété électrique opposée à celle de la première pièce polaire (1), puis par leur enroulement dans la même direction, et un électrolyte. La première pièce polaire (1) comprend un premier collecteur de courant (12) et une première couche de matière active (11) fixée à la surface du premier collecteur de courant (12). La seconde pièce polaire (2) comprend un second collecteur de courant (22) et une seconde couche de matière active (21) fixée à la surface du second collecteur de courant (22). La première couche de matière active (11) comporte une première rainure (111), et la seconde couche de matière active (21) est pourvue d'une seconde rainure (211). La première rainure (111) est située à l'extrémité de départ de la première pièce polaire (1) d'enroulement, et la seconde rainure (211) est située à l'extrémité de départ ou au milieu de la seconde pièce polaire (2) d'enroulement. Une première languette (5) est intégrée dans la première rainure (111), et une seconde languette (6) est intégrée dans la seconde rainure (211). La batterie optimise les positions où sont situées les languettes (5, 6) sur les pièces polaires (1, 2), de telle sorte que les problèmes de la cellule (4), tels qu'une faible dureté, une déformation facile et une symétrie médiocre, sont résolus, et le taux de passage d'un test d'abus de batterie est amélioré.
PCT/CN2016/105421 2015-12-29 2016-11-11 Batterie à structure d'enroulement WO2017113999A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201521115080.1U CN205355186U (zh) 2015-12-29 2015-12-29 一种卷绕结构的电池
CN201521115080.1 2015-12-29

Publications (1)

Publication Number Publication Date
WO2017113999A1 true WO2017113999A1 (fr) 2017-07-06

Family

ID=56171072

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/105421 WO2017113999A1 (fr) 2015-12-29 2016-11-11 Batterie à structure d'enroulement

Country Status (2)

Country Link
CN (1) CN205355186U (fr)
WO (1) WO2017113999A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109299505A (zh) * 2018-08-15 2019-02-01 郑州大学 降低卷绕式动力电池衰减速率的极片设计方法及装置
CN110233299A (zh) * 2018-03-06 2019-09-13 宁德新能源科技有限公司 卷绕式电芯
CN111755663A (zh) * 2019-03-29 2020-10-09 宁德新能源科技有限公司 极片及应用该极片的电芯
EP3696899A4 (fr) * 2017-10-11 2021-06-30 Samsung SDI Co., Ltd. Ensemble d'électrodes et batterie secondaire le comprenant
CN113366682A (zh) * 2020-09-14 2021-09-07 东莞新能安科技有限公司 电化学装置及电子装置
CN113795939A (zh) * 2020-03-31 2021-12-14 宁德新能源科技有限公司 电极组件及电芯
CN114586191A (zh) * 2021-07-23 2022-06-03 宁德新能源科技有限公司 电芯与用电装置
CN114583288A (zh) * 2019-08-09 2022-06-03 珠海冠宇电池股份有限公司 一种电芯和电池
CN115398669A (zh) * 2021-12-22 2022-11-25 宁德新能源科技有限公司 一种电化学装置、电池模组及用电装置
WO2023088434A1 (fr) * 2021-11-18 2023-05-25 珠海冠宇电池股份有限公司 Plaque et batterie

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108352492B (zh) 2015-08-31 2021-08-31 宁德新能源科技有限公司 二次电池电芯
CN205355186U (zh) * 2015-12-29 2016-06-29 宁德新能源科技有限公司 一种卷绕结构的电池
CN106159196A (zh) * 2016-08-29 2016-11-23 天津力神电池股份有限公司 埋极耳式极片及锂离子电池
CN109256580A (zh) * 2018-09-28 2019-01-22 桑顿新能源科技有限公司 一种改善重物冲击性能的软包锂离子电池及其制备方法
CN109524606B (zh) * 2018-11-05 2022-07-26 宁德新能源科技有限公司 极片、电芯及电池
CN111211357B (zh) 2018-11-22 2022-06-10 宁德新能源科技有限公司 一种卷绕电芯
CN113571778B (zh) * 2018-12-12 2023-08-18 宁德时代新能源科技股份有限公司 卷绕式电芯、锂离子二次电池及负极极片
US20230096112A1 (en) * 2020-01-20 2023-03-30 Ningde Amperex Technology Limited Electrode assembly and battery
WO2021146873A1 (fr) * 2020-01-20 2021-07-29 宁德新能源科技有限公司 Ensemble d'électrodes et batterie
CN111969151A (zh) * 2020-08-31 2020-11-20 东莞新能德科技有限公司 电池及电子装置
CN113113563A (zh) * 2021-03-29 2021-07-13 东莞新能安科技有限公司 电化学装置及电子装置
EP4336580A1 (fr) * 2021-05-08 2024-03-13 Ningde Amperex Technology Limited Élément de batterie et dispositif électrique
CN113675541A (zh) * 2021-08-19 2021-11-19 宁德新能源科技有限公司 电极组件、电池和用电设备
WO2024031254A1 (fr) * 2022-08-08 2024-02-15 宁德时代新能源科技股份有限公司 Ensemble électrode, élément de batterie, batterie et dispositif électrique
WO2024055733A1 (fr) * 2022-09-15 2024-03-21 珠海冠宇电池股份有限公司 Roulé et batterie
CN117673438A (zh) * 2024-02-02 2024-03-08 武汉星纪魅族科技有限公司 电极组件、电池单体、电池及用电设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102201594A (zh) * 2010-03-25 2011-09-28 深圳市比克电池有限公司 一种方形锂离子电池及其制作方法
CN203733894U (zh) * 2014-01-17 2014-07-23 宁德新能源科技有限公司 锂离子电池
CN204204984U (zh) * 2014-10-09 2015-03-11 深圳市比克电池有限公司 圆柱动力锂离子电池中间极耳卷芯结构及卷芯制作方法
CN104600250A (zh) * 2014-11-21 2015-05-06 天津力神电池股份有限公司 锂离子电池多极耳极片制备方法、极组制备方法及电池
CN205355186U (zh) * 2015-12-29 2016-06-29 宁德新能源科技有限公司 一种卷绕结构的电池

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102201594A (zh) * 2010-03-25 2011-09-28 深圳市比克电池有限公司 一种方形锂离子电池及其制作方法
CN203733894U (zh) * 2014-01-17 2014-07-23 宁德新能源科技有限公司 锂离子电池
CN204204984U (zh) * 2014-10-09 2015-03-11 深圳市比克电池有限公司 圆柱动力锂离子电池中间极耳卷芯结构及卷芯制作方法
CN104600250A (zh) * 2014-11-21 2015-05-06 天津力神电池股份有限公司 锂离子电池多极耳极片制备方法、极组制备方法及电池
CN205355186U (zh) * 2015-12-29 2016-06-29 宁德新能源科技有限公司 一种卷绕结构的电池

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3696899A4 (fr) * 2017-10-11 2021-06-30 Samsung SDI Co., Ltd. Ensemble d'électrodes et batterie secondaire le comprenant
CN110233299A (zh) * 2018-03-06 2019-09-13 宁德新能源科技有限公司 卷绕式电芯
CN110233299B (zh) * 2018-03-06 2024-04-26 宁德新能源科技有限公司 卷绕式电芯
CN109299505A (zh) * 2018-08-15 2019-02-01 郑州大学 降低卷绕式动力电池衰减速率的极片设计方法及装置
CN111755663A (zh) * 2019-03-29 2020-10-09 宁德新能源科技有限公司 极片及应用该极片的电芯
CN114583288B (zh) * 2019-08-09 2023-12-15 珠海冠宇电池股份有限公司 一种电芯和电池
CN114583288A (zh) * 2019-08-09 2022-06-03 珠海冠宇电池股份有限公司 一种电芯和电池
CN113795939A (zh) * 2020-03-31 2021-12-14 宁德新能源科技有限公司 电极组件及电芯
CN113366682B (zh) * 2020-09-14 2022-12-20 东莞新能安科技有限公司 电化学装置及电子装置
CN113366682A (zh) * 2020-09-14 2021-09-07 东莞新能安科技有限公司 电化学装置及电子装置
CN114586191A (zh) * 2021-07-23 2022-06-03 宁德新能源科技有限公司 电芯与用电装置
CN114586191B (zh) * 2021-07-23 2024-05-10 宁德新能源科技有限公司 电芯与用电装置
WO2023088434A1 (fr) * 2021-11-18 2023-05-25 珠海冠宇电池股份有限公司 Plaque et batterie
CN115398669A (zh) * 2021-12-22 2022-11-25 宁德新能源科技有限公司 一种电化学装置、电池模组及用电装置

Also Published As

Publication number Publication date
CN205355186U (zh) 2016-06-29

Similar Documents

Publication Publication Date Title
WO2017113999A1 (fr) Batterie à structure d'enroulement
US20190013505A1 (en) Battery electrode and secondary battery using the same
CN111403789B (zh) 电极组件及电池
US11108118B2 (en) Cell and electrochemical device
WO2022227729A1 (fr) Cellule et appareil d'utilisation de puissance
CN104157914A (zh) 一种高功率软包装锂离子电池及其制作工艺
WO2013159454A1 (fr) Batterie cylindrique au lithium-ion de haute capacité et son procédé de production
CN110429328B (zh) 一种改善电池内部温升的方法
CN206098526U (zh) 卷绕式二次电芯
CN205159450U (zh) 一种中出极耳式卷绕电芯及功率型电池
CN105261781B (zh) 一种电化学电池及其制备方法
JP7359848B2 (ja) 電極アセンブリ及び電池
WO2007071122A1 (fr) Batterie aux ions de lithium a enroulement avec un bac de boitier souple et son procede de fabrication
JP4707328B2 (ja) 渦巻状電極群を備えた電池およびその製造方法
CN207719304U (zh) 一种圆柱形电池的多极耳卷芯及圆柱形电池
WO2022268147A1 (fr) Batterie au lithium-ion et son procédé de préparation
CN106654348B (zh) 锂电池
WO2022042303A1 (fr) Cellule au lithium-ion
WO2022170451A1 (fr) Cellule et dispositif électronique l'utilisant
CN211045637U (zh) 一种聚合物电芯
CN211578871U (zh) 一种防电芯短路的极耳及电芯
US20230246272A1 (en) Electrochemical apparatus and electronic apparatus
CN217588983U (zh) 一种中间出极耳式正极片、电芯及电池
CN107293806A (zh) 卷绕式电芯
CN217214761U (zh) 一种正极极片及电芯

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16880790

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16880790

Country of ref document: EP

Kind code of ref document: A1