WO2021228164A1 - 极耳及使用该极耳的电池结构 - Google Patents

极耳及使用该极耳的电池结构 Download PDF

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Publication number
WO2021228164A1
WO2021228164A1 PCT/CN2021/093453 CN2021093453W WO2021228164A1 WO 2021228164 A1 WO2021228164 A1 WO 2021228164A1 CN 2021093453 W CN2021093453 W CN 2021093453W WO 2021228164 A1 WO2021228164 A1 WO 2021228164A1
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WO
WIPO (PCT)
Prior art keywords
tab
stress relief
bending portion
stress
bending
Prior art date
Application number
PCT/CN2021/093453
Other languages
English (en)
French (fr)
Inventor
刘承香
温松江
Original Assignee
路华置富电子(深圳)有限公司
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Publication of WO2021228164A1 publication Critical patent/WO2021228164A1/zh

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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
    • H01M10/04—Construction or manufacture in general
    • 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
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • 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
    • 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
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • 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 invention relates to the field of tabs, in particular to a tab and a battery structure using the tabs.
  • the battery is a device that can convert chemical energy into electrical energy, and has a positive electrode and a negative electrode.
  • the battery is one of the essential configurations for the battery life of electrical equipment.
  • Batteries are roughly classified into batteries with wound cells and batteries with laminated cells.
  • a battery with a wound cell is wound by a pole piece to form a wound cell; the tabs will lead out the positive and negative poles of the wound cell.
  • the existing tabs have high stress at the bending parts, and the bending parts of the tabs are easy to scratch the wound cells during the manufacturing process of the wound cells.
  • the present invention provides a lug.
  • the bending part of the lug is provided with a stress relief structure, which solves the problem that there are many lugs in the prior art and the structure design is not reasonable enough.
  • the part is easy to scratch the wound battery.
  • the technical solution of the present invention is: a tab for leading out the electrode of the battery, wherein the tab includes
  • the first end is arranged at one end of the tab, and is used to connect with the pole piece of the wound battery;
  • the second end is arranged at the other end of the tab and is used to connect with the conductive device;
  • a bending portion, the bending portion is located between the first end lug and the second end, and is used to adjust the extension direction of the lug;
  • the bending portion is provided with a stress relief structure for eliminating the stress generated by the bending of the tab;
  • the stress relief structure is a stress relief block, a stress relief hole or a plurality of stress relief holes arranged at the position of the bending part, and the width of the tab where the stress relief structure is set is that where the stress relief structure is not set 1/2 ⁇ 2/3 of the width of the tabs.
  • the present invention also provides a tab for leading out the electrode of the battery cell, wherein the tab includes
  • the first end is arranged at one end of the tab, and is used to connect with the pole piece of the wound battery;
  • the second end is arranged at the other end of the tab and is used to connect with the conductive device;
  • a bending portion, the bending portion is located between the first end lug and the second end, and is used to adjust the extension direction of the lug;
  • the bending portion is provided with a stress relief structure for eliminating the stress generated by the bending of the tab.
  • the width of the tab where the stress relief structure is provided is 1/2 to 2/3 of the width of the tab where the stress relief structure is not provided.
  • the stress relief structure is a stress relief block arranged at the position of the bending portion, and the stress relief block is located in the middle of the bending portion,
  • the stress relief structure is a stress relief block arranged at the position of the bending part, and the tabs on one side of the stress relief block are flush with the tabs where the stress relief structure is not provided.
  • the length of the stress relief block is between 0.3 mm and 10 mm.
  • the stress relief structure is a stress relief hole arranged at the position of the bending part, the length of the tab where the stress relief hole is arranged is between 0.3mm and 10mm, and the stress relief hole is arranged
  • the width of the tab is 1/3 ⁇ 1/2 of the width of the tab where the stress relief structure is not provided.
  • the structure of the stress relief hole is a circular, rectangular or polygonal structure.
  • the bending portion has a plurality of the stress relief holes, and the plurality of stress relief holes are uniformly arranged on the bending portion.
  • At least one side of the stress relief block is provided with a notch, and the shape of the notch is a semicircular, rectangular, trapezoidal or polygonal structure.
  • the tabs and the pole pieces of the wound battery are ultrasonically welded.
  • the present invention also provides a battery structure, which includes
  • the wound battery core includes the above-mentioned tab, the tab is used to lead out the electrode of the wound cell, and the tab includes:
  • the first end is arranged at one end of the tab, and is used to connect with the pole piece of the wound battery;
  • the second end is arranged at the other end of the tab and is used to connect with the conductive device;
  • a bending portion, the bending portion is located between the first end lug and the second end, and is used to adjust the extension direction of the lug;
  • the bending portion is provided with a stress relief structure for eliminating the stress generated by the bending of the tab.
  • the tab of the present invention is provided with a stress relief structure at the bending part, which reduces the stress of the tab at the bending part and solves the problem of the bending part of the tab.
  • the problem of easy scratching of the winding core improves the stability and safety of the battery structure using the tab.
  • FIG. 1 is a schematic diagram of the structure of the first embodiment of the tab of the present invention.
  • Fig. 2 is a structural diagram of a second embodiment of the first embodiment of the tab of the present invention.
  • Fig. 3 is a schematic diagram of the wound cell structure of the battery structure of the present invention.
  • Fig. 4 is a schematic structural diagram of a second embodiment of the tab of the present invention.
  • Fig. 5 is a schematic structural diagram of a third embodiment of a tab of the present invention.
  • Fig. 6 is a schematic structural diagram of a fourth embodiment of the tab of the present invention.
  • tab 31 first end portion 311, second end portion 312, bending portion 313, and stress relief block 3131.
  • tab 41 first end 411, second end 412, bending part 413, and stress relief groove 4131.
  • the reference signs of the battery structure the wound cell 12, the second tab 121, and the first tab 122.
  • first and second in the terms of the present invention are only for descriptive purposes, and cannot be understood as indicating or implying relative importance, and not as a restriction on the order of sequence.
  • FIG. 1 is a schematic structural diagram of a first embodiment of a tab of the present invention.
  • the following is a tab provided by the present invention that can solve the above technical problems.
  • the tab 11 in this embodiment is used to lead out the electrode of the battery cell.
  • the tab 11 includes a first end 111, a second end 112 and a bent portion 113.
  • the first end 111 is arranged at one end of the tab 11 and is used to connect with the pole piece of the wound cell;
  • the second end 112 is set at the other end of the tab 11 and is used to connect with the conductive device;
  • the bending part 113 is located at the first end.
  • One end 111 between the tab 11 and the second end 112 is used to adjust the extension direction of the tab 11.
  • the bending portion 113 is provided with a stress relief structure, and the stress relief structure is used to eliminate the stress generated by the bending of the tab 11.
  • the stress relief structure is a stress relief block 1131 arranged at the position of the bending portion 113, and the stress relief block 1131 is located in the middle of the bending portion 113.
  • the width of the tab 11 at the stress relief structure is 1/2 ⁇ 2/3 of the width of the tab 11 where the stress relief structure is not provided; the length of the stress relief block is between 0.3mm and 10mm.
  • the two sides of the stress relief block 1131 are respectively provided with notches, and the notches prevent the bending part 113 of the tab 11 and the winding core from being worn out.
  • the structure of the notch may be a semicircular, rectangular, trapezoidal or polygonal structure.
  • the stress relief block 1131 is provided with notches of a trapezoidal structure respectively on both sides.
  • the stress block 1131 is arranged in the middle of the bending part 113, and the force on both sides of the tab 11 is more even, which improves the stability of the tab 11 for stress relief, and avoids the tab 11 from being unevenly stressed and easily broken. .
  • FIG. 2 is a structural diagram of a second implementation manner of the first embodiment of the tab of the present invention.
  • the second embodiment of the tab of this embodiment is provided as follows:
  • the middle of the bent portion 113a of the tab is provided with a stress block 1131a, and both sides of the stress relief block 1131a are provided with semi-circular notches.
  • the shaped notch avoids wear of the bent portion 113a of the tab and the winding core.
  • FIG. 3 is a schematic diagram of the wound cell structure of the battery structure of the present invention.
  • the battery structure includes a casing and a wound cell 12 arranged in the casing.
  • the wound cell includes a first tab 121 provided with a stress relief structure, and the first tab 121 is used to lead out the first electrode of the wound cell 12.
  • the first tab 121 includes a first end, a second end, and a bent portion.
  • the first end is arranged at one end of the first tab 121 for connecting with the pole piece of the wound cell; the second end is set at the other end of the first tab 121; the bent part is located at the first end of the first pole Between the ear 121 and the second end, it is used to adjust the extension direction of the first tab 121.
  • the bending portion is provided with a stress relief structure, and the stress relief structure is used to eliminate the stress generated by the bending of the first tab 121.
  • the stress relief structure is a stress relief block arranged at the position of the bending portion, and the stress relief block is located in the middle of the bending portion.
  • the width of the first tab 121 at the stress relief structure is 1/2 to 2/3 of the width of the first tab 121 where the stress relief structure is not provided; the length of the stress relief block is between 0.3 mm and 10 mm.
  • notches are respectively provided on both sides of the stress relief block, and the notches prevent the bending part of the first tab 121 and the wound cell 12 from being worn out.
  • the structure of the notch can be a semicircular, rectangular, trapezoidal or polygonal structure. In this embodiment, there are trapezoidal notches on both sides of the stress relief block.
  • the stress block in this embodiment is arranged in the middle of the bending part, and the force on both sides of the first tab 121 is more even, which improves the stability of the stress relief of the first tab 121 and avoids the first tab 121 from being stressed. Even and easy to break.
  • the wound cell 12 further includes a second tab 122 provided with a stress relief structure.
  • the second tab 122 is used to lead out the second electrode of the wound cell 12, and the first electrode is opposite to the second electrode.
  • the battery structure in this embodiment uses tabs with a stress relief structure to solve the problem that the bent parts of the tabs are easy to scratch the winding core, which improves the stability of the battery structure and the safety of the battery structure.
  • FIG. 4 is a schematic structural diagram of a second embodiment of the tab of the present invention.
  • the following is a second embodiment of a tab provided by the present invention:
  • the tab 21 in this embodiment is used to lead out the electrode of the battery cell.
  • the tab 21 includes a first end 211, a second end 212 and a bent portion 213.
  • the first end 211 is arranged at one end of the tab 21 and is used to connect with the pole piece of the wound cell;
  • the second end 212 is set at the other end of the tab 21 and is used to connect with the conductive device;
  • the bending part 213 is located at the second end.
  • One end 211, between the tab 21 and the second end 212, is used to adjust the extension direction of the tab 21.
  • the bending portion 213 is provided with a stress relief structure, which is used to eliminate the stress generated by the bending of the tab 21.
  • the stress relief structure is a stress relief block 2131 arranged at the position of the bending portion 213, and the tab 21 on one side of the stress relief block is flush with the tab 21 where the stress relief structure is not provided.
  • the width of the tab 21 at the stress relief structure is 1/2 to 2/3 of the width of the tab 21 where the stress relief structure is not provided; the length of the stress relief block 2131 is between 0.3 mm and 10 mm.
  • a gap is provided on the other side of the stress relief block 2131, and the structure of the gap is a semicircular, rectangular, trapezoidal or polygonal structure.
  • the stress relief structure of the tab 21 in this embodiment is a stress relief block 2131 arranged at the bending part 213 on the side of the tab 21.
  • the stress relief block 2131 reduces the bending of the tab 21.
  • the stress concentration of the part 213; the notch on one side of the stress relief block 2131 prevents the bending part 213 of the tab 21 and the core from being worn; the stress relief structure of the tab in this embodiment is simple, which is convenient for the production and processing of the tab.
  • FIG. 5 is a schematic structural diagram of a third embodiment of the tab of the present invention.
  • the following is a third embodiment of a tab provided by the present invention:
  • the tab 31 in this embodiment is used to lead out the electrode of the cell.
  • the tab 31 includes a first end 311, a second end 312 and a bent portion 313.
  • the first end 331 is arranged at one end of the tab 31 and is used to connect with the pole piece of the wound battery;
  • the second end 312 is set at the other end of the tab 31 and is used to connect with the conductive device;
  • the bending part 313 is located at the first end.
  • the one end 311 between the tab 31 and the second end 312 is used to adjust the extension direction of the tab 31.
  • the bending portion 313 is provided with a stress relief structure, and the stress relief structure is used to eliminate the stress generated by the bending of the tab 31.
  • the stress relief structure is a stress relief hole 3131 set at the position of the bending portion 313, the length of the tab 31 where the stress relief hole 3131 is located is between 0.3mm and 10mm, and the length of the lug 31 where the stress relief hole 3131 is set
  • the width of the tab 31 is 1/3 ⁇ 1/2 of the width of the tab 31 where the stress relief structure is not provided.
  • the structure of the stress relief hole 3131 may be a circular, rectangular or polygonal structure.
  • the structure of the stress relief hole 3131 is diversified to meet the needs of customers for different stress relief structures.
  • the tab 31 and the pole piece of the wound battery are ultrasonically welded.
  • FIG. 6 is a schematic structural diagram of a fourth embodiment of the tab of the present invention.
  • the following is a fourth embodiment of a tab provided by the present invention:
  • the tab 41 includes a first end 411, a second end 412 and a bent portion 413.
  • the first end 411 is arranged at one end of the tab 41 and is used to connect with the pole piece of the wound cell; the second end 412 is set at the other end of the tab 41 and is used to connect with the conductive device; the bending part 413 is located at the first end.
  • the one end 411 between the tab 41 and the second end 412 is used to adjust the extension direction of the tab 41.
  • the bending portion 413 is provided with a stress relief structure, and the stress relief structure is used to eliminate the stress generated by the bending of the tab 41.
  • the bending portion 413 has a plurality of stress relief holes 4131, and the plurality of stress relief holes 4131 are uniformly arranged on the bending portion 413.
  • the sum of the widths of the multiple stress relief holes 4131 in each row is 1/3 ⁇ 1/2 of the width of the tab 41 where the stress relief structure is not provided; multiple stress relief holes in each row
  • the total length of 4131 is between 0.3mm ⁇ 10mm.
  • a plurality of stress relief holes 4131 are provided in the bending portion 413 to improve the stress relief effect of the tab 41 and improve the structural stability of the tab.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

一种极耳(11,21,31,41)，极耳(11,21,31,41)用于引出电芯(12)的电极。极耳(11,21,31,41)包括第一端部(111,211,311,411)、第二端部(112,212,312,412)以及弯折部(113,213,313,413)。第一端部(111,211,311,411)设置在极耳(11,21,31,41)一端，用于与卷绕电芯(12)的极片连接；第二端部(112,212,312,412)设置在极耳(11,21,31,41)另一端，用于与导电装置连接；弯折部(113,213,313,413)，位于第一端部(111,211,311,411)与第二端部(112,212,312,412)之间，用于调节极耳(11,21,31,41)的延伸方向。其中，弯折部(113,213,313,413)设有去应力结构(1131,2131,3131,4131)，去应力结构(1131,2131,3131,4131)用于消除极耳(11,21,31,41)弯折产生的应力。

Description

极耳及使用该极耳的电池结构 技术领域
本发明涉及极耳领域，特别涉及一种极耳及使用该极耳的电池结构。
 背景技术
目前电池是一种能将化学能转化成电能的装置，具有正极、负极之分。随着科技的进步，人们的生活越来越智能化和便捷化，各种用家电器的出现减少了人们的劳动量，而电池是电器设备续航必不可少的配置之一。
电池大致分为具有卷绕电芯的电池和具有叠片电芯的电池。具有卷绕电芯的电池通过极片绕卷形成卷绕电芯；极耳将从卷绕电芯中的正负极引出来。
 技术问题
现有的极耳在弯折部位应力大，卷绕电芯在制造过程中，极耳的弯折部位易刮伤卷绕电芯。
故需要提供一种极耳及使用该极耳的电池结构来解决上述技术问题。
 技术解决方案
本发明提供一种极耳，极耳的弯折部设置有去应力结构，解决了现有技术中的极耳多存在结构设计不够合理，极耳在弯折部位应力大，极耳的弯折部位易刮伤卷绕电芯的问题。
为解决上述技术问题，本发明的技术方案为：一种极耳，用于引出电芯的电极，其中所述极耳包括
第一端部，设置在所述极耳一端，用于与卷绕电芯的极片连接；
第二端部，设置在所述极耳另一端，用于与导电装置连接；以及
弯折部，所述弯折部位于所述第一端部极耳与所述第二端部之间，用于调节所述极耳的延伸方向；
其中，所述弯折部设有用于消除所述极耳弯折产生的应力的去应力结构；
所述去应力结构为设置在所述弯折部位置的去应力块、一个去应力孔或多个去应力孔，设置所述去应力结构处的极耳宽度为未设置所述去应力结构处的极耳宽度的1/2~2/3。
本发明还提供一种极耳，用于引出电芯的电极，其中所述极耳包括
第一端部，设置在所述极耳一端，用于与卷绕电芯的极片连接；
第二端部，设置在所述极耳另一端，用于与导电装置连接；以及
弯折部，所述弯折部位于所述第一端部极耳与所述第二端部之间，用于调节所述极耳的延伸方向；
其中，所述弯折部设有用于消除所述极耳弯折产生的应力的去应力结构。
本发明中，设置所述去应力结构处的极耳宽度为未设置所述去应力结构处的极耳宽度的1/2~2/3。
本发明中，所述去应力结构为设置在所述弯折部位置的去应力块，所述去应力块位于所述弯折部的中部，
本发明中，所述去应力结构为设置在所述弯折部位置的去应力块，所述去应力块一侧的极耳与未设置所述去应力结构处的极耳平齐。
本发明中，所述去应力块的长度介于0.3mm~10mm之间。
本发明中，所述去应力结构为设置在所述弯折部位置的一个去应力孔，设置所述去应力孔处的极耳长度介于0.3mm~10mm之间，设置所述去应力孔处的极耳宽度为未设置所述去应力结构处的极耳宽度的1/3~1/2。
本发明中，所述去应力孔的结构为圆形、矩形或者多边形结构。
本发明中，所述弯折部具有多个所述去应力孔，多个所述去应力孔均匀设置在所述弯折部。
本发明中，所述去应力块至少一侧设有缺口，所述缺口的形状为半圆形、矩形、梯形或者多边形结构。
本发明中，所述极耳与所述卷绕电芯的极片通过超声焊接。
本发明还提供了一种电池结构，其包括
卷绕电芯，用于提供电能；
其中，所述卷绕电芯包括如上一种极耳，所述极耳用于引出所述卷绕电芯的电极，所述极耳包括：
第一端部，设置在所述极耳一端，用于与卷绕电芯的极片连接；
第二端部，设置在所述极耳另一端，用于与导电装置连接；以及
弯折部，所述弯折部位于所述第一端部极耳与所述第二端部之间，用于调节所述极耳的延伸方向；
其中，所述弯折部设有用于消除所述极耳弯折产生的应力的去应力结构。
 有益效果
本发明相较于现有技术，其有益效果为：本发明的极耳通过在弯折部位设置有去应力结构，减小了极耳在弯折部位的应力，解决了极耳的弯折部位易刮伤卷芯的问题，提升了使用该极耳的电池结构的稳定性以及安全性。
 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面对实施例中所需要使用的附图作简单的介绍，下面描述中的附图仅为本发明的部分实施例相应的附图。
图1为本发明的极耳的第一实施例的结构示意图。
图2为本发明的极耳的第一实施例的第二种实施方式结构图。
图3为本发明的电池结构的绕卷电芯结构示意图。
图4为本发明的极耳的第二实施例的结构示意图。
图5为本发明的极耳的第三实施例的结构示意图。
图6为本发明的极耳的第四实施例的结构示意图。
极耳的第一实施例附图标记：极耳11、第一端部111、第二端部112、弯折部113、去应力孔1131；第二中实施方式：弯折部113a、去应力孔1131a。
极耳的第二实施例附图标记：极耳21、第一端部211、第二端部212、弯折部213、去应力孔2131。
极耳的第三实施例附图标记：极耳31、第一端部311、第二端部312、弯折部313、去应力块3131。
极耳的第四实施例附图标记：极耳41、第一端部411、第二端部412、弯折部413、去应力槽4131。
电池结构的附图标记：卷绕电芯12、第二极耳121、第一极耳122。
 本发明的最佳实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在图中，结构相似的单元是以相同标号表示。
本发明术语中的“第一”“第二”等词仅作为描述目的，而不能理解为指示或暗示相对的重要性，以及不作为对先后顺序的限制。
请参照图1，图1为本发明的极耳的第一实施例的结构示意图。如下为本发明提供的一种能解决以上技术问题的极耳。
本实施例中的极耳11用于引出电芯的电极。极耳11包括第一端部111、第二端部112以及弯折部113。第一端部111设置在极耳11一端，用于与卷绕电芯的极片连接；第二端部112设置在极耳11另一端，用于与导电装置连接；弯折部113位于第一端部111极耳11与第二端部112之间，用于调节极耳11的延伸方向。其中，弯折部113设有去应力结构，去应力结构用于消除极耳11弯折产生的应力。
结合图1，对本实施例中极耳的结构进行详细阐述：
本实施例中，去应力结构为设置在弯折部113位置的去应力块1131，去应力块1131位于弯折部113的中部。去应力结构处的极耳11宽度为未设置去应力结构处的极耳11宽度的1/2~2/3；去应力块的长度介于0.3mm~10mm之间。
本实施例中，去应力块1131两侧分别设有缺口，缺口避免了极耳11的弯折部113与卷芯磨损。缺口的结构可以为半圆形、矩形、梯形或者多边形结构，本实施例中去应力块1131两侧分别设有梯形结构的缺口。
本实施例中的应力块1131设置在弯折部113的中部，极耳11两侧受力更均匀，提升了极耳11去应力的稳定性，避免了极耳11受力不均、易断裂。
请参照图2，图2为本发明的极耳的第一实施例的第二种实施方式结构图。如下提供本实施例极耳的第二种实施方式：本实施例中，极耳的弯折部113a的中部设有应力块1131a，去应力块1131a两侧分别设有半圆形缺口，半圆形缺口避免了极耳的弯折部113a与卷芯磨损。
请参照图3，图3为本发明的电池结构的绕卷电芯结构示意图。如下为本发明提供的一种电池结构，电池结构包括壳体以及设置在壳体内的卷绕电芯12。卷绕电芯包括设有去应力结构的第一极耳121，第一极耳121用于引出卷绕电芯12的第一电极。第一极耳121包括第一端部、第二端部以及弯折部。第一端部设置在第一极耳121一端，用于与卷绕电芯的极片连接；第二端部设置在第一极耳121另一端；弯折部位于第一端部第一极耳121与第二端部之间，用于调节第一极耳121的延伸方向。其中，弯折部设有去应力结构，去应力结构用于消除第一极耳121弯折产生的应力。
本实施例中，去应力结构为设置在弯折部位置的去应力块，去应力块位于弯折部的中部。去应力结构处的第一极耳121宽度为未设置去应力结构处的第一极耳121宽度的1/2~2/3；去应力块的长度介于0.3mm~10mm之间。
本实施例中，去应力块两侧分别设有缺口，缺口避免了第一极耳121的弯折部与卷绕电芯12磨损。缺口的结构可以为半圆形、矩形、梯形或者多边形结构，本实施例中去应力块两侧分别设有梯形结构的缺口。
本实施例中的应力块设置在弯折部的中部，第一极耳121两侧受力更均匀，提升了第一极耳121去应力的稳定性，避免了第一极耳121受力不均、易断裂。
本实施例中，卷绕电芯12还包括设有去应力结构的第二极耳122。第二极耳122用于引出卷绕电芯12的第二电极，第一电极与第二电极相反。
本实施例中的电池结构，通过使用具有去应力结构的极耳，解决了极耳的弯折部位易刮伤卷芯的问题，提升了电池结构的稳定性，以及电池结构使用的安全性。
结合图4，图4为本发明的极耳的第二实施例的结构示意图。如下为本发明提供的一种极耳的第二实施例：
本实施例中的极耳21用于引出电芯的电极。极耳21包括第一端部211、第二端部212以及弯折部213。第一端部211设置在极耳21一端，用于与卷绕电芯的极片连接；第二端部212设置在极耳21另一端，用于与导电装置连接；弯折部213位于第一端部211，极耳21与第二端部212之间，用于调节极耳21的延伸方向。其中，弯折部213设有去应力结构，去应力结构用于消除极耳21弯折产生的应力。
本实施例中，去应力结构为设置在弯折部213位置的去应力块2131，去应力块一侧的极耳21与未设置去应力结构处的极耳21平齐。
本实施例中，去应力结构处的极耳21宽度为未设置去应力结构处的极耳21宽度的1/2~2/3；去应力块2131的长度介于0.3mm~10mm之间。
去应力块2131另一侧设有缺口，缺口的结构为半圆形、矩形、梯形或者多边形结构。
与上述实施例的区别在于，本实施例极耳21的去应力结构为设置在极耳21一侧的弯折部213的去应力块2131，去应力块2131减小了极耳21在弯折部213的应力集中；去应力块2131一侧的缺口避免了极耳21的弯折部213与卷芯磨损；本实施例中极耳的去应力结构简单，便于极耳的生产加工。
结合图5，图5为本发明的极耳的第三实施例的结构示意图。如下为本发明提供的一种极耳的第三实施例：
本实施例中的极耳31用于引出电芯的电极。极耳31包括第一端部311、第二端部312以及弯折部313。第一端部331设置在极耳31一端，用于与卷绕电芯的极片连接；第二端部312设置在极耳31另一端，用于与导电装置连接；弯折部313位于第一端部311极耳31与第二端部312之间，用于调节极耳31的延伸方向。其中，弯折部313设有去应力结构，去应力结构用于消除极耳31弯折产生的应力。
本实施例中，去应力结构为设置在弯折部313位置的一个去应力孔3131，设置去应力孔3131处的极耳31长度介于0.3mm~10mm之间，设置去应力孔3131处的极耳31宽度为未设置去应力结构处的极耳31宽度的1/3~1/2。
本实施例中，去应力孔3131的结构可以为圆形、矩形或者多边形结构。去应力孔3131的结构多样化，满足了客户的对不同去应力结构的需求。
本实施例中，极耳31与卷绕电芯的极片通过超声焊接。
结合图6，图6为本发明的极耳的第四实施例的结构示意图。如下为本发明提供的一种极耳的第四实施例：
极耳41包括第一端部411、第二端部412以及弯折部413。第一端部411设置在极耳41一端，用于与卷绕电芯的极片连接；第二端部412设置在极耳41另一端，用于与导电装置连接；弯折部413位于第一端部411极耳41与第二端部412之间，用于调节极耳41的延伸方向。其中，弯折部413设有去应力结构，去应力结构用于消除极耳41弯折产生的应力。
本实施例中，弯折部413具有多个去应力孔4131，多个去应力孔4131均匀设置在弯折部413。
多个去应力孔4131中，每排的多个去应力孔4131的宽度之和为未设置去应力结构处的极耳41宽度的1/3~1/2；每排的多个去应力孔4131的长度之和介于0.3mm~10mm之间。
本实施例中的极耳通过在弯折部413设置多个去应力孔4131，提升了极耳41的去应力的效果，提升了极耳的结构稳定性。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (12)

  1. 一种极耳，用于引出电芯的电极，其中所述极耳包括
    第一端部，设置在所述极耳一端，用于与卷绕电芯的极片连接；
    第二端部，设置在所述极耳另一端，用于与导电装置连接；以及
    弯折部，所述弯折部位于所述第一端部极耳与所述第二端部之间，用于调节所述极耳的延伸方向；
    其中，所述弯折部设有用于消除所述极耳弯折产生的应力的去应力结构；
    所述去应力结构为设置在所述弯折部位置的去应力块、一个去应力孔或多个去应力孔，设置所述去应力结构处的极耳宽度为未设置所述去应力结构处的极耳宽度的1/2~2/3。
  2. 一种极耳，用于引出电芯的电极，其中所述极耳包括
    第一端部，设置在所述极耳一端，用于与卷绕电芯的极片连接；
    第二端部，设置在所述极耳另一端，用于与导电装置连接；以及
    弯折部，所述弯折部位于所述第一端部极耳与所述第二端部之间，用于调节所述极耳的延伸方向；
    其中，所述弯折部设有用于消除所述极耳弯折产生的应力的去应力结构。
  3. 根据权利要求2所述的极耳，其中设置所述去应力结构处的极耳宽度为未设置所述去应力结构处的极耳宽度的1/2~2/3。
  4. 根据权利要求3所述的极耳，其中所述去应力结构为设置在所述弯折部位置的去应力块，所述去应力块位于所述弯折部的中部。
  5. 根据权利要求3所述的极耳，其中所述去应力结构为设置在所述弯折部位置的去应力块，所述去应力块一侧的极耳与未设置所述去应力结构处的极耳平齐。
  6. 根据权利要求3所述的极耳，其中所述去应力块的长度介于0.3mm~10mm之间。
  7. 根据权利要求2所述的极耳，其中所述去应力结构为设置在所述弯折部位置的一个去应力孔，设置所述去应力孔处的极耳长度介于0.3mm~10mm之间，设置所述去应力孔处的极耳宽度为未设置所述去应力结构处的极耳宽度的1/3~1/2。
  8. 根据权利要求7所述的极耳，其中所述去应力孔的结构为圆形、矩形或者多边形结构。
  9. 根据权利要求7所述的极耳，其中所述弯折部具有多个所述去应力孔，多个所述去应力孔均匀设置在所述弯折部。
  10. 根据权利要求5所述的极耳，其中所述去应力块至少一侧设有缺口，所述缺口的形状为半圆形、矩形、梯形或者多边形结构。
  11. 根据权利要求2所述的极耳，其中所述极耳与所述卷绕电芯的极片通过超声焊接。
  12. 一种电池结构，其包括：
    卷绕电芯，用于提供电能；
    其中，所述卷绕电芯包括如一种极耳，所述极耳用于引出所述卷绕电芯的电极，所述极耳包括：
    第一端部，设置在所述极耳一端，用于与卷绕电芯的极片连接；
    第二端部，设置在所述极耳另一端，用于与导电装置连接；以及
    弯折部，所述弯折部位于所述第一端部极耳与所述第二端部之间，用于调节所述极耳的延伸方向；
    其中，所述弯折部设有用于消除所述极耳弯折产生的应力的去应力结构。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115458872A (zh) * 2022-11-10 2022-12-09 瑞浦兰钧能源股份有限公司 二次电池的转接片

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN212625970U (zh) * 2020-05-12 2021-02-26 路华置富电子(深圳)有限公司 极耳及使用该极耳的电池结构
CN113299975B (zh) * 2021-07-06 2022-12-02 合肥国轩高科动力能源有限公司 锂离子电池结构及装配方法
CN115552715A (zh) * 2022-01-05 2022-12-30 宁德新能源科技有限公司 一种电池及用电装置
CN118249049A (zh) * 2024-05-29 2024-06-25 江苏时代新能源科技有限公司 电池单体、电池、用电设备及电池单体的制造方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202495508U (zh) * 2012-02-13 2012-10-17 东莞新能源科技有限公司 一种软包装锂离子电池及其极耳
JP2014022116A (ja) * 2012-07-13 2014-02-03 Shin Kobe Electric Mach Co Ltd 二次電池用極板及び二次電池用極板の製造方法
CN104838521A (zh) * 2012-11-30 2015-08-12 Fdk株式会社 正极引线、碱性充电电池
CN204927403U (zh) * 2015-09-24 2015-12-30 宁德时代新能源科技有限公司 动力电池的极耳及采用该极耳的动力电池
CN109698309A (zh) * 2018-12-28 2019-04-30 蜂巢能源科技有限公司 锂离子电池、车辆、锂离子电池组装方法
CN209329016U (zh) * 2018-12-28 2019-08-30 蜂巢能源科技有限公司 单片结构的动力电池连接片及动力电池盖板
CN209947931U (zh) * 2019-04-25 2020-01-14 微宏动力系统（湖州）有限公司 一种极耳及包括该极耳的电池
CN212625970U (zh) * 2020-05-12 2021-02-26 路华置富电子(深圳)有限公司 极耳及使用该极耳的电池结构

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202495508U (zh) * 2012-02-13 2012-10-17 东莞新能源科技有限公司 一种软包装锂离子电池及其极耳
JP2014022116A (ja) * 2012-07-13 2014-02-03 Shin Kobe Electric Mach Co Ltd 二次電池用極板及び二次電池用極板の製造方法
CN104838521A (zh) * 2012-11-30 2015-08-12 Fdk株式会社 正极引线、碱性充电电池
CN204927403U (zh) * 2015-09-24 2015-12-30 宁德时代新能源科技有限公司 动力电池的极耳及采用该极耳的动力电池
CN109698309A (zh) * 2018-12-28 2019-04-30 蜂巢能源科技有限公司 锂离子电池、车辆、锂离子电池组装方法
CN209329016U (zh) * 2018-12-28 2019-08-30 蜂巢能源科技有限公司 单片结构的动力电池连接片及动力电池盖板
CN209947931U (zh) * 2019-04-25 2020-01-14 微宏动力系统（湖州）有限公司 一种极耳及包括该极耳的电池
CN212625970U (zh) * 2020-05-12 2021-02-26 路华置富电子(深圳)有限公司 极耳及使用该极耳的电池结构

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115458872A (zh) * 2022-11-10 2022-12-09 瑞浦兰钧能源股份有限公司 二次电池的转接片

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