CN113078422A - Battery cell and electric equipment - Google Patents

Battery cell and electric equipment Download PDF

Info

Publication number
CN113078422A
CN113078422A CN202110308532.1A CN202110308532A CN113078422A CN 113078422 A CN113078422 A CN 113078422A CN 202110308532 A CN202110308532 A CN 202110308532A CN 113078422 A CN113078422 A CN 113078422A
Authority
CN
China
Prior art keywords
pole piece
utmost point
electrode assembly
tab
battery cell
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.)
Granted
Application number
CN202110308532.1A
Other languages
Chinese (zh)
Other versions
CN113078422B (en
Inventor
张羽听
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen Xinneng'an Technology Co ltd
Original Assignee
Dongguan Poweramp Technology Ltd
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 Dongguan Poweramp Technology Ltd filed Critical Dongguan Poweramp Technology Ltd
Priority to CN202110308532.1A priority Critical patent/CN113078422B/en
Publication of CN113078422A publication Critical patent/CN113078422A/en
Application granted granted Critical
Publication of CN113078422B publication Critical patent/CN113078422B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • 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

Landscapes

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

Abstract

The utility model provides an electric core, includes electrode assembly and the casing of acceping electrode assembly, and electrode assembly stacks gradually and convolutes through first pole piece, diaphragm and second pole piece and forms, and one side electricity of first pole piece is connected with a plurality of first utmost point ears, and after the completion of convoluteing, a plurality of first utmost point ears stack gradually, and a plurality of first utmost point ears set up in the casing, and wherein every first utmost point ear is provided with location structure, and location structure includes at least one of through-hole, breach, arch or protruding portion. An electric device comprises the battery cell. The battery cell detects the dislocation height difference and the direction of the positioning structure on the tab through X-ray, so that the purpose of calculating the height difference between the inner pole pieces is achieved, and the risk of escaping of the defective products is reduced. The electric equipment also achieves the purpose of reducing the escape of the bad products through the battery cell.

Description

Battery cell and electric equipment
Technical Field
The application relates to a battery cell and electric equipment.
Background
When a high-capacity battery core is manufactured at present, the height difference between the cathode and the anode of each layer of the battery core needs to be detected through X-ray, but because the thickness of the high-capacity battery core is large and the number of layers is large, the X-ray penetration recognition capability is limited, the height difference of the cathode and the anode of the inner layer of the battery core cannot be recognized through the X-ray, the problem that bad products with too high height difference cannot be detected exists, and the risk that the bad products escape is increased.
Disclosure of Invention
In view of the above, it is desirable to provide a battery cell capable of determining a height difference between inner pole pieces and an electric device having the battery cell.
An embodiment of the application provides an electric core, include electrode assembly and accept electrode assembly's casing, electrode assembly stacks gradually and convolutes through first pole piece, diaphragm and second pole piece and forms, a side electricity of first pole piece is connected with a plurality of first utmost point ears, and it is a plurality of after the coiling is accomplished first utmost point ear stacks gradually, and is a plurality of first utmost point ear sets up in the casing, wherein every first utmost point ear is provided with location structure, location structure includes at least one of through-hole, breach, arch or protruding portion.
The battery cell detects the dislocation height difference and the direction of the positioning structure on the tab through X-ray, so that the purpose of calculating the height difference between the inner pole pieces is achieved, and the risk of escaping of the defective products is reduced.
In some embodiments, the stacked first tabs are sequentially arranged in a staggered manner in the same direction, so as to improve the detection accuracy.
In some embodiments, the location of the locating structure is the same at each of the first tabs.
In some embodiments, the locating formations of adjacent two of the first tabs are on different sides.
In some embodiments, the positioning structures of adjacent two of the first tabs are different in shape.
In some embodiments, the positioning structure is located at an edge of one side of the first tab.
In some embodiments, when the positioning structure is a notch or a through hole, the positioning structure may penetrate through an edge of one side of the first tab.
In some embodiments, the positioning structure is one of triangular, circular, or quadrilateral in shape.
In some embodiments, each of the first tabs has one or more of the locating structures.
In some embodiments, the battery cell further includes a first tab lead, and a plurality of first tabs are sequentially stacked and then electrically connected to one end of the first tab lead, and the other end of the first tab lead extends out of the casing to form positive and negative electrodes of the battery cell.
In some embodiments, a plurality of second pole lugs are electrically connected to one side of the second pole piece, and after the winding is completed, the plurality of second pole lugs are sequentially stacked, and the plurality of second pole lugs are disposed in the housing, wherein each second pole lug is provided with a positioning structure, and the positioning structure includes at least one of a through hole, a notch, a protrusion, or a protrusion. The positioning structure on the second tab can adopt the same arrangement mode as the positioning structure on the first tab.
Another embodiment of the present application further provides an electric device, including the above battery cell.
The electric equipment also achieves the purpose of reducing the escape of the bad products through the battery cell.
Drawings
Fig. 1 is a schematic perspective view of a cell and an electrode assembly according to an embodiment of the present disclosure.
Fig. 2(a) - (e) are schematic structural views of positioning structures in some embodiments.
Fig. 3 is a schematic structural diagram illustrating a height difference between a first pole piece and a second pole piece of the outermost two layers of the electrode assembly in one embodiment.
Fig. 4 is a side view of a cell in an embodiment of the present application.
Description of the main elements
Battery cell 100
Case 100a
Electrode assembly 10
First pole piece 11
First tab 11a
First tab lead 11b
Second pole piece 12
Second pole ear 12a
Second lug lead 12b
Diaphragm 13
Positioning structure 20
Detailed Description
The technical solutions of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
An embodiment of the application provides an electric core, include electrode assembly and accept electrode assembly's casing, electrode assembly stacks gradually and convolutes through first pole piece, diaphragm and second pole piece and forms, a side electricity of first pole piece is connected with a plurality of first utmost point ears, and it is a plurality of after the coiling is accomplished first utmost point ear stacks gradually, and is a plurality of first utmost point ear sets up in the casing, wherein every first utmost point ear is provided with location structure, location structure includes at least one of through-hole, breach, arch or protruding portion.
The battery cell detects the dislocation height difference and the direction of the positioning structure on the tab through X-ray, so that the purpose of calculating the height difference between the inner pole pieces is achieved, and the risk of escaping of the defective products is reduced.
Another embodiment of the present application further provides an electric device, including the above battery cell. The electric equipment also achieves the purpose of reducing the escape of the bad products through the battery cell.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following embodiments, features of the embodiments may be combined with each other without conflict.
Referring to fig. 1, an embodiment of the present application provides a battery cell 100 including an electrode assembly 10. The electrode assembly 10 includes a first pole piece 11, a second pole piece 12, and a separator 13. The first pole piece 11, the second pole piece 12 and the separator 13 are sequentially laminated and wound to form the electrode assembly 10. One side of the first pole piece 11 along the length direction is electrically connected with a plurality of first tabs 11 a. The second pole piece 12 is electrically connected to a plurality of second pole lugs 12a along the same side in the length direction. The plurality of first tabs 11a are spaced apart from each other. The plurality of first tabs 12a are spaced apart from each other. After the winding is completed, all the first tabs 11a overlap each other while all the second tabs 12a overlap each other, and the first tabs 11a and the second tabs 12a do not overlap each other. Each first tab 11a and each second tab 12a is provided with a positioning structure 20. Since the X-ray cannot pass through the first and second electrode plates 11 and 12 in the inner layer, the height difference between the positioning structures 20 on the first and second electrode tabs 11a and 12a in two adjacent layers is detected by the X-ray to calculate the height difference between the first and second adjacent electrode plates 11 and 12.
Referring to fig. 2, in some embodiments, the positioning structure 20 may be in the form of at least one of a through hole, a notch, a protrusion, or a protrusion.
In some embodiments, in order to improve the detection accuracy, the stacked first tab 11a or second tab 12a may be sequentially staggered in the same direction, as shown in fig. 2.
In some embodiments, the location of the positioning structure 20 on each first tab 11a or each second tab 12a is the same, such as a central portion or an edge portion of the first tab 11a or the second tab 12 a. In other embodiments, the positions of the positioning structures 20 on each first tab 11a or each second tab 12a may be different, for example, the positioning structures 20 of two adjacent first tabs 11a or second tabs 12a are on different sides.
In some embodiments, the shapes of the positioning structures 20 of the two adjacent first tabs 11a or second tabs 12a are the same or different, for example, the shapes of the positioning structures 20 may be triangular, circular or quadrilateral, etc.
In some embodiments, when the positioning structure 20 is a notch or a through hole, the positioning structure 20 may penetrate through an edge of one side of the first tab 11a or the second tab 12 a.
In some embodiments, the number of the positioning structures 20 on each first tab 11a or each second tab 12a may be one, two, or more.
Referring to fig. 3, in an embodiment, the height difference between the positioning structures 20 on the first tab 11a and the second tab 12a of two adjacent layers is calculated by:
suppose that the first pole piece 11 and the second pole piece 12 are wound together by n layers to form the electrode assembly 10, and the outermost layer is L1Layer, the second outer layer is L2Layer, the third outer layer is L3Layer … innermost layer is LnA layer;
x-ray detection L1Layer and L2The location structure 20 between the two first pole pieces 11 in the layer, L is obtained1Layer and L2The height difference between the two first pole pieces 11 in the layer is A1And L is2Layer relative L1When the layer height is reduced A1Is positive, whereas the height is increased to A1A negative value;
x-ray detection L1Layer and L2The location structure 20 between two second pole pieces 12 in the layer, L is obtained1Layer and L2The difference in height between two second pole pieces 12 in a layer is B1And L is2Layer relative L1Height is increased to B1Positive values, whereas the height decreases to B1A negative value;
x-ray detection of L in the resulting electrode assembly 101 First pole piece 11 and L of the layer1The difference in height between the second pole pieces 12 of the layers being C1And C is the first pole piece 11 is higher than the second pole piece 121Positive value, C when the first pole piece 11 is lower than the second pole piece 121Is a negative value;
can calculate to obtain L2 First pole piece 11 and L of the layer2Height difference C between the second pole pieces 12 of the layer2Comprises the following steps: c2＝C1-A1-B1；
By analogy, the height difference between two adjacent first pole pieces 11 from the outer layer to the inner layer is obtained by detecting the positioning structure 20 through the X-ray and is A respectively1、A2、A3…An-1And the height difference between two adjacent second pole pieces 12 from the outer layer to the inner layer is B1、B2、B3…Bn-1The height difference between the first pole piece 11 and the second pole piece 12 of each layer can be calculated as follows:
Cx＝Cx-1-Ax-1-Bx-1wherein x is the number of layers from the outer layer to the inner layer, and if all C arexWhen the values are positive values, the first pole piece 11 of each layer covers the second pole piece 12, namely the electrode assembly 10 is qualified in detection; if one Cx is a negative value, the second pole piece 12 of the layer is exposed out of the first pole piece 11, and the detection is not qualified.
It will be appreciated that in other embodiments, the height difference between the positioning structures 20 may also be detected by machine vision techniques.
Referring to fig. 4, the battery cell 100 further includes a first tab lead 11 b. The stacked plurality of first tabs 11a are electrically connected to one ends of the first tab leads 11b after being press-fitted at ends thereof remote from the electrode assembly 10. Similarly, the battery cell 100 further includes a second tab lead 12b, and the stacked second tabs 12a are electrically connected to one end of the second tab lead 12b after being pressed at the end away from the electrode assembly 10.
The battery cell 100 further includes a casing 100a, the first pole piece 11, the second pole piece 12 and the diaphragm 13 are disposed in the casing 100a, and ends of the first tab lead 11b and the second tab lead 12b, which are far away from the electrode assembly 10, respectively extend out of the casing 100a to form a positive electrode and a negative electrode of the battery cell 100. The shell can be an aluminum plastic film, a hard shell or a steel shell and the like.
It is understood that, in other embodiments, the positioning structures 20 on the first tab 11a and the second tab 12a may also be applied to the battery cell 100 in a lamination structure.
Another embodiment of the present application further provides an electrical device, which includes any one of the battery cells 100 described above.
The battery cell 100 of the above embodiment detects the dislocation height difference and direction of the positioning structure 20 on the first tab 11a or the second tab 12a by using X-ray, so as to achieve the purpose of calculating the height difference between the inner layer first pole piece 11 and the second pole piece 12, and further reduce the risk of the bad product escaping. The electric equipment also achieves the purpose of reducing the escape of the defective products through the battery cell 100.
In addition, those skilled in the art should recognize that the foregoing embodiments are illustrative only, and not limiting, and that appropriate changes and modifications to the foregoing embodiments may be made within the spirit and scope of the present disclosure.

Claims (10)

1. The utility model provides an electric core, includes electrode assembly and accepts electrode assembly's casing, electrode assembly is laminated according to the preface and is convoluteed through first pole piece, diaphragm and second pole piece and form, a side electricity of first pole piece is connected with a plurality of first utmost point ears, and after the completion of convoluteing, it is a plurality of first utmost point ear is laminated in proper order, its characterized in that, and is a plurality of first utmost point ear sets up in the casing, wherein every first utmost point ear is provided with location structure, location structure includes at least one of through-hole, breach, arch or protruding portion.
2. The battery cell of claim 1, wherein the stacked first tabs are sequentially staggered in the same direction.
3. The electrical core of claim 1, wherein the positioning structure is the same at each of the first tabs.
4. The cell of claim 1, wherein the positioning structures of two adjacent first tabs are on different sides.
5. The electrical core of claim 1, wherein the positioning structures of two adjacent first tabs are different in shape.
6. The cell of claim 1, wherein the locating structure is located at an edge of one side of the first tab.
7. The cell of claim 6, wherein the locating structure extends through an edge of one side of the first tab.
8. The electrical core of claim 1, wherein the positioning structure is one of triangular, circular, or quadrilateral in shape.
9. The electrical core of claim 1, wherein each of the first tabs has one or more of the locating structures.
10. An electrical consumer, characterized in that it comprises a cell according to any one of claims 1 to 9.
CN202110308532.1A 2021-03-23 2021-03-23 Battery cell and electric equipment Active CN113078422B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110308532.1A CN113078422B (en) 2021-03-23 2021-03-23 Battery cell and electric equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110308532.1A CN113078422B (en) 2021-03-23 2021-03-23 Battery cell and electric equipment

Publications (2)

Publication Number Publication Date
CN113078422A true CN113078422A (en) 2021-07-06
CN113078422B CN113078422B (en) 2022-11-04

Family

ID=76613510

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110308532.1A Active CN113078422B (en) 2021-03-23 2021-03-23 Battery cell and electric equipment

Country Status (1)

Country Link
CN (1) CN113078422B (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203950857U (en) * 2014-07-08 2014-11-19 宁德新能源科技有限公司 Flexible-packed battery and battery modules
CN105322125A (en) * 2014-06-17 2016-02-10 三星Sdi株式会社 Secondary battery
US20160218345A1 (en) * 2015-01-28 2016-07-28 Samsung Sdi Co., Ltd. Electrode assembly and rechargeable battery having electrode tab
CN107112578A (en) * 2015-01-13 2017-08-29 艾利电力能源有限公司 The position bias detecting method and its device of battery lead plate in electrode laminated body
JP2018133306A (en) * 2017-02-17 2018-08-23 リチウム エナジー アンド パワー ゲゼルシャフト ミット ベシュレンクテル ハフッング ウント コンパニー コマンディトゲゼルシャフトＬｉｔｈｉｕｍ Ｅｎｅｒｇｙ ａｎｄ Ｐｏｗｅｒ ＧｍｂＨ ＆ Ｃｏ． ＫＧ Power storage element
CN209434338U (en) * 2019-03-25 2019-09-24 宁德新能源科技有限公司 Battery
WO2020218473A1 (en) * 2019-04-26 2020-10-29 三洋電機株式会社 Electrode plate, nonaqueous electrolyte secondary battery, and electrode plate manufacturing method
WO2020231054A1 (en) * 2019-05-14 2020-11-19 주식회사 엘지화학 Electrode assembly and inspection method therefor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105322125A (en) * 2014-06-17 2016-02-10 三星Sdi株式会社 Secondary battery
CN203950857U (en) * 2014-07-08 2014-11-19 宁德新能源科技有限公司 Flexible-packed battery and battery modules
CN107112578A (en) * 2015-01-13 2017-08-29 艾利电力能源有限公司 The position bias detecting method and its device of battery lead plate in electrode laminated body
US20160218345A1 (en) * 2015-01-28 2016-07-28 Samsung Sdi Co., Ltd. Electrode assembly and rechargeable battery having electrode tab
JP2018133306A (en) * 2017-02-17 2018-08-23 リチウム エナジー アンド パワー ゲゼルシャフト ミット ベシュレンクテル ハフッング ウント コンパニー コマンディトゲゼルシャフトＬｉｔｈｉｕｍ Ｅｎｅｒｇｙ ａｎｄ Ｐｏｗｅｒ ＧｍｂＨ ＆ Ｃｏ． ＫＧ Power storage element
CN209434338U (en) * 2019-03-25 2019-09-24 宁德新能源科技有限公司 Battery
WO2020218473A1 (en) * 2019-04-26 2020-10-29 三洋電機株式会社 Electrode plate, nonaqueous electrolyte secondary battery, and electrode plate manufacturing method
WO2020231054A1 (en) * 2019-05-14 2020-11-19 주식회사 엘지화학 Electrode assembly and inspection method therefor

Also Published As

Publication number Publication date
CN113078422B (en) 2022-11-04

Similar Documents

Publication Publication Date Title
US5585206A (en) Battery electrode interconnections
CN105609882B (en) Energy storage device with internal multi-core stacked layers
KR20130118716A (en) Electrode assembly, battery cell and device comprising the same
CN105122494A (en) Battery cell having rounded corner
JP6109957B2 (en) Electrode assembly including round corners
JP2019194998A (en) Electrode assembly and secondary battery having the same
US20200136194A1 (en) Electrode assembly, and lithium ion electric roll using the electrode assembly
CN113675541A (en) Electrode assembly, battery and electric equipment
CN112838259B (en) Pole piece assembly, battery core and battery
CN212571274U (en) Lithium ion battery and electronic device
CN114171805A (en) Lithium ion battery structure and assembling method thereof
WO2021232720A1 (en) Multi-tab cylindrical battery roll core and lithium ion battery
CN113875059B (en) Battery cell structure and battery
CN113078422B (en) Battery cell and electric equipment
CN107293806B (en) Winding type battery cell
CN217507589U (en) Connection piece, electric core structure and battery of lamination battery
CN113381132B (en) Multi-tab battery cell and battery
CN115498366B (en) Electrochemical device and electric equipment
CN107293804B (en) Winding type battery cell
JPH1140202A (en) Manufacture of electrode plate assembly of battery and the electrode plate assembly manufactured by the same
CN113964370A (en) Power battery with four-electrode-group structure and assembly method thereof
CN114223077A (en) Battery and electric equipment
CN110192292B (en) Battery cell and method of manufacturing battery cell
CN112151747A (en) Pole piece, battery cell, lamination method of battery cell and button cell
CN215008280U (en) Battery cell pole piece, winding type battery cell, battery and electronic equipment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20231227

Address after: 411-1, No. 942, Tonglong Second Road, Torch High tech Zone (Xiang'an) Industrial Zone, Xiamen, Fujian 361,000

Patentee after: Xiamen Xinneng'an Technology Co.,Ltd.

Address before: No.1, Xinghui Road, Songshanhu Park, Dongguan, Guangdong 523000

Patentee before: Dongguan xinneng'an Technology Co.,Ltd.

TR01 Transfer of patent right