CN116344913A - Battery cell structure, lithium battery device and manufacturing method of battery cell structure - Google Patents
Battery cell structure, lithium battery device and manufacturing method of battery cell structure Download PDFInfo
- Publication number
- CN116344913A CN116344913A CN202310201040.1A CN202310201040A CN116344913A CN 116344913 A CN116344913 A CN 116344913A CN 202310201040 A CN202310201040 A CN 202310201040A CN 116344913 A CN116344913 A CN 116344913A
- Authority
- CN
- China
- Prior art keywords
- cell assembly
- positive electrode
- negative electrode
- battery cell
- battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 75
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000004804 winding Methods 0.000 claims abstract description 119
- 239000008358 core component Substances 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims description 21
- 238000005452 bending Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 238000010030 laminating Methods 0.000 claims 1
- 238000005096 rolling process Methods 0.000 claims 1
- 210000004027 cell Anatomy 0.000 description 245
- 238000003466 welding Methods 0.000 description 35
- 230000000712 assembly Effects 0.000 description 12
- 238000000429 assembly Methods 0.000 description 12
- 210000003850 cellular structure Anatomy 0.000 description 12
- 238000010586 diagram Methods 0.000 description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 9
- 230000001681 protective effect Effects 0.000 description 8
- 239000002390 adhesive tape Substances 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- UQMRAFJOBWOFNS-UHFFFAOYSA-N butyl 2-(2,4-dichlorophenoxy)acetate Chemical compound CCCCOC(=O)COC1=CC=C(Cl)C=C1Cl UQMRAFJOBWOFNS-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
-
- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
- H01M50/512—Connection only in parallel
-
- 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
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a battery cell structure, a lithium battery device and a manufacturing method thereof, and belongs to the technical field of power lithium batteries. The battery cell assembly comprises a first battery cell assembly and a second battery cell assembly, wherein the first battery cell assembly comprises a plurality of first winding cores, and positive electrode lugs and negative electrode lugs which are positioned on one side of the first winding cores; the second battery cell assembly comprises a plurality of second winding cores, and positive electrode lugs and negative electrode lugs which are positioned on one side of the second winding cores; the positive electrode lug of the first electric core component is opposite to the positive electrode lug of the second electric core component and is connected with the positive electrode connecting sheet, and the negative electrode lug of the first electric core component is opposite to the negative electrode lug of the second electric core component and is connected with the negative electrode connecting sheet; the positive electrode lug and the negative electrode lug are bent at the root parts of the positive electrode lug and the negative electrode lug, so that the positions of the first battery cell assembly and the second battery cell assembly are staggered in the height direction of the winding core. The invention is mainly used for further improving the energy density of the battery by adopting a cross type stacking electric core mode.
Description
Technical Field
The invention relates to the technical field of power lithium batteries, in particular to a battery cell structure, a lithium battery device and a manufacturing method thereof.
Background
Lithium batteries, also called lithium ion batteries, are widely applied to power automobiles and mobile equipment as new energy sources at present, and are beneficial to alleviating the pollution problem caused by traditional fossil energy sources. With the development of lithium battery technology, in order to meet the industrial demands and improve the convenience of new energy use of batteries, high-capacity lithium batteries have become a trend of industry development, and on this basis, various large battery manufacturers have proposed a multi-core parallel scheme for improving the energy capacity of battery packs. In order to increase the storage capacity of the lithium battery and prolong the discharge time of the lithium battery, manufacturers propose a lot of technical schemes for improving the capacity of the lithium battery, but the current market mainly uses double-roll core assembly and adopts a butterfly welding process for connection.
For example, chinese patent CN215146167U discloses a welding device for butterfly welding of electric core, which comprises a workbench, a linear module fixed on the workbench, an anode welding mechanism, an anode station pressing mechanism, a cathode welding mechanism and a cathode station pressing mechanism, and an electric core tooling mechanism connected on the linear module. However, the butterfly welding process has the following defects: firstly, in order to reserve a butterfly welding process space, longer positive and negative electrode lugs are required to be reserved, so that the battery core is easy to cause adverse phenomena such as lug turnover, wrinkling and the like in the forming process, and the battery core is easy to be scrapped due to short circuit; secondly, during butterfly welding, the process needs to perform core combination operation of double battery cores, and positive and negative lugs can be bent into Z-shaped lugs in the process, so that the lugs are easy to bend and insert into a battery core body, and short circuit rejection of a lithium battery is caused; thirdly, the battery cell manufactured by the process is not compact in structure, the energy density of the lithium battery is difficult to further improve, and the market requirement cannot be met.
Through searching Chinese patent CN113644357A, a battery based on multi-core parallel connection and an assembly method thereof are disclosed. After laser welding, the first pair of winding core units and the second pair of winding core units are bent at the middle of the first single winding core and the second single winding core back to one side of the cover plate mechanism, and the positive electrode lug and the negative electrode lug of the first pair of winding core units and the positive electrode lug and the negative electrode lug of the second pair of winding core units are bent so that the first single winding core, the second single winding core, the third single winding core and the fourth single winding core are stacked along the thickness direction of the first single winding core, the second single winding core, the third single winding core and the fourth single winding core. In this scheme, though avoiding adopting the butterfly welding technology, but positive negative pole ear still need crooked and stop the frame spare and be connected after stretching out, and the utmost point ear that needs is longer, is unfavorable for the compactness of electric core structure, and this electric core structure if needs arbitrary structure in addition, need design the utmost point ear of different length, is inconvenient for the arbitrary combination of electric core.
Disclosure of Invention
1. Technical problem to be solved by the invention
Aiming at least some problems in the prior art, the invention provides a battery cell structure, a lithium battery device and a manufacturing method thereof, and solves the problem that the energy density of a battery is difficult to further improve by adopting a cross type battery cell stacking mode.
2. Technical proposal
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
a battery cell structure comprises a battery cell, a battery cell and a battery,
the battery cell assembly comprises a first battery cell assembly and a second battery cell assembly, wherein the first battery cell assembly comprises a plurality of first winding cores, and positive lugs and negative lugs which are positioned on one side of the first winding cores;
the second battery cell assembly comprises a plurality of second winding cores, and positive electrode lugs and negative electrode lugs which are positioned on one side of the second winding cores;
the positive electrode lug of the first electric core component is opposite to the positive electrode lug of the second electric core component and is connected with the positive electrode connecting sheet, and the negative electrode lug of the first electric core component is opposite to the negative electrode lug of the second electric core component and is connected with the negative electrode connecting sheet;
the positive electrode lug and the negative electrode lug are bent at the root parts of the positive electrode lug and the negative electrode lug, so that the positions of the first battery cell assembly and the second battery cell assembly are staggered in the height direction of the winding core.
Further, when the number of winding cores in the first cell assembly or the second cell assembly is plural, one positive electrode lug and one negative electrode lug are led out from the winding cores together.
Further, the positive electrode connecting sheet and the negative electrode connecting sheet are perpendicular to the surface of the winding core.
The invention also provides a manufacturing method of the battery cell structure, which is used for manufacturing the battery cell structure and comprises the following steps:
step one: aligning the positive electrode lug of the first battery cell assembly with the positive electrode lug of the second battery cell assembly, and connecting the positive electrode lug with the positive electrode connecting sheet; aligning the negative electrode lug of the first cell assembly with the negative electrode lug of the second cell assembly, and connecting the negative electrode lug with the negative electrode connecting sheet;
step two: the first battery cell assembly and the second battery cell assembly are moved along the height direction of the winding core, the positive electrode lug and the negative electrode lug are bent at the root parts of the winding core, the surfaces of the positive electrode lug and the negative electrode lug are attached to one winding core, and meanwhile, the positions of the first battery cell assembly and the second battery cell assembly are staggered.
Further, after the first electric core component and the second electric core component in the first step are aligned and connected, before the root parts of the positive electrode lug and the negative electrode lug are bent, the first electric core component and the second electric core component are in axisymmetry or centrosymmetric along the connecting middle line; and in the second step, when the first battery cell assembly and the second battery cell assembly are in dislocation movement, the movement directions of the first battery cell assembly and the second battery cell assembly are opposite.
The invention also provides a lithium battery device, which comprises two groups of one battery cell structure, wherein the two groups of battery cell structures are overlapped together in a mutually crossed matching way along the gap between the first battery cell assembly and the second battery cell assembly in a staggered way.
Further, the positive electrode connecting piece and the negative electrode connecting piece extend out and are positioned on the same side of the lithium battery device.
Further, the positive connection pieces of the two groups of battery cell structures are connected with the positive connection pieces, the negative connection pieces of the two groups of battery cell structures are connected with the negative connection pieces, one end of each positive connection piece, which is not connected with the positive connection piece, extends out of the lithium battery device, one end of each negative connection piece, which is not connected with the negative connection piece, extends out of the lithium battery device, and the positive connection pieces, the negative connection pieces and the surface of the winding core are attached together.
Further, one end of the positive electrode transfer sheet extending out of the lithium battery device is connected with the positive electrode cover plate, and one end of the negative electrode transfer sheet extending out of the lithium battery device is connected with the negative electrode cover plate.
The invention also provides a manufacturing method of the lithium battery device, which is used for manufacturing the lithium battery device, and comprises the following steps: the two groups of the battery core structures are overlapped together in a mutually crossed matching way along the gaps formed by the dislocation connection of the first battery core component and the second battery core component, so that a square multi-coil core parallel structure is formed;
step two: after the two groups of cell structures are overlapped in a crossing way, the positive electrode connecting pieces and the negative electrode connecting pieces extend out and are positioned on the same side of the lithium battery device, the positive electrode connecting pieces of the two groups of cell structures are connected with the positive electrode switching pieces, the positive electrode switching pieces are bent in the direction close to the winding core, and the positive electrode switching pieces are attached to the surface of the winding core;
connecting the two groups of negative electrode connecting sheets of the battery cell structure with the negative electrode switching sheets, bending the negative electrode switching sheets towards the direction close to the winding core, and enabling the negative electrode switching sheets to be attached to the surface of the winding core;
step three: one end of the positive electrode rotating sheet is connected with the positive electrode cover plate, and the positive electrode cover plate is folded to be attached to the end face of the winding core; and connecting one end of the negative electrode switching sheet with the negative electrode cover plate, and folding the negative electrode cover plate to enable the negative electrode cover plate to be attached to the end face of the winding core.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
(1) According to the battery cell structure, the lithium battery device and the manufacturing method thereof, the battery cell assembly in the battery cell structure comprises a first battery cell assembly and a second battery cell assembly, and the first battery cell assembly and the second battery cell assembly are connected in a pairing manner through positive lugs and negative lugs; and then the positive electrode lug and the negative electrode lug are bent at the root parts of the positive electrode lug and the negative electrode lug, so that the positions of the first battery cell component and the second battery cell component are staggered in the height direction of the winding core, and the two groups of battery cell structures are connected in parallel, so that the energy of the battery is doubled.
(2) According to the battery cell structure, the lithium battery device and the manufacturing method of the lithium battery device, after the positions of the first battery cell component and the second battery cell component are staggered in the height direction of the winding core, the positive electrode lug and the negative electrode lug are bent only at the root parts of the first battery cell component and the second battery cell component, and other parts of the positive electrode lug and the negative electrode lug are in a mutual stretching state, so that the risk of battery short circuit rejection caused by the fact that the battery lug is inserted into the battery cell body after being bent again is avoided.
(3) According to the battery cell structure, the lithium battery device and the manufacturing method of the battery cell structure, the positive electrode lugs are connected with the positive electrode connecting pieces in the straightening state, the negative electrode lugs are connected with the negative electrode connecting pieces in the straightening state, the positive electrode lugs and the negative electrode lugs do not need to be bent again to be connected with the positive and negative connecting pieces, the required positive and negative electrode lugs are shorter, and the risk of easy folding and wrinkling caused by the problem of the length of the electrode lugs in the front end forming process of the battery cell is reduced.
(4) According to the battery cell structure, the lithium battery device and the manufacturing method thereof, the lithium battery device comprises two groups of battery cell structures, the two groups of battery cell structures are overlapped together in a mutually crossed fit manner along the gaps between the first battery cell assembly and the second battery cell assembly in a staggered manner, so that the number of battery cells is doubled again, the battery energy is doubled, only one positive electrode rotating sheet and one negative electrode rotating sheet are arranged in each lithium battery device, the parts and the part structures in the device are simplified, the battery device is more compact, and the energy density of the lithium battery can be further improved.
(5) According to the battery cell structure, the lithium battery device and the manufacturing method thereof, the two groups of battery cell structures are mutually matched and overlapped in a crossing manner, the combination method of the battery cell structures is simple and easy to operate, the combination mode is flexible and changeable, different types and different numbers of battery cell structures can be derived, once the battery cell structures are successfully combined, the capacity of the battery is doubled, the energy of the battery is greatly improved, and the battery cell structure has good applicability to a large-capacity lithium battery.
Drawings
Fig. 1 is a schematic perspective view of a first or second battery cell assembly according to a first embodiment of the invention;
FIG. 2 is a schematic view of another perspective view of a first or second cell assembly according to an embodiment of the invention;
fig. 3 is a schematic diagram of a first battery cell assembly and a second battery cell assembly after being connected in a pairing manner according to a first embodiment of the present invention;
FIG. 4 is an enlarged top view of the junction of the first and second cell assemblies of FIG. 3;
FIG. 5 is a bottom view of FIG. 4;
fig. 6 is a schematic structural diagram of a first electrical core assembly and a second electrical core assembly in the first embodiment of the present invention after being connected in a pairing manner, and a protective adhesive tape is attached;
fig. 7 is a schematic view of another angle structure of the first and second battery cell assemblies in the first embodiment of the present invention after the first and second battery cell assemblies are connected in pairs and then a protective tape is attached;
fig. 8 is a schematic structural diagram of a first battery cell assembly and a second battery cell assembly in a first embodiment of the present invention after being staggered in a height direction of a winding core;
fig. 9 is an enlarged front view of a connection position of a first cell assembly and a second cell assembly, which are staggered with each other in the first embodiment of the present invention;
fig. 10 is a schematic diagram illustrating cross-matching of a cell structure of two sets of embodiments in accordance with a fifth embodiment of the present invention;
fig. 11 is a schematic diagram of a stacked structure of two groups of cell structures according to a fifth embodiment of the present invention;
fig. 12 is a schematic plan view of a stacked cell structure according to a fifth embodiment of the present invention;
fig. 13 is a schematic diagram of a battery cell structure after a negative electrode connection piece and a negative electrode switching piece are connected in a fifth embodiment of the present invention;
FIG. 14 is a schematic view showing a negative electrode tab folded onto the surface of a winding core together with a negative electrode tab in accordance with the fifth embodiment of the present invention;
FIG. 15 is a schematic view showing a positive electrode tab and a positive electrode tab folded onto a surface of a winding core together in a fifth embodiment of the invention;
fig. 16 is a schematic view of a structure of an insulating film coated on the outer side of a lithium battery device according to a fifth embodiment of the present invention;
fig. 17 is a schematic diagram of a fifth embodiment of the present invention, in which a positive electrode switching piece is connected to a positive electrode cover plate, and a negative electrode switching piece is connected to a negative electrode cover plate;
fig. 18 is a schematic structural diagram of the fifth embodiment of the present invention, in which the positive electrode cover plate and the negative electrode cover plate are folded and fastened with the aluminum case;
fig. 19 is a schematic diagram of a second embodiment of the present invention after the first and second battery cell assemblies are connected in pairs;
fig. 20 is a front view of a mating connection position of a first battery cell assembly and a second battery cell assembly in a second embodiment of the invention;
fig. 21 is a schematic diagram of a stacked structure of a first cell structure and a second cell structure according to a sixth embodiment of the present invention;
fig. 22 is a schematic diagram of a stacked alternative angle structure of a first cell structure and a second cell structure according to a sixth embodiment of the present invention;
fig. 23 is a schematic diagram of a third embodiment of the present invention after the first and second battery cell assemblies are connected in pairs;
fig. 24 is a schematic plan view of a stacked three-cell structure of two groups of the seventh embodiment of the present invention;
fig. 25 is a schematic plan view of a stacked two-group battery cell structure after the two-group battery cell structure in the eighth embodiment of the invention, wherein the first battery cell assembly includes one winding core and the second battery cell assembly includes two winding cores;
fig. 26 is a schematic plan view of a stacked two-group battery cell structure after two-group battery cell structures are completed when two winding cores are included in a first battery cell assembly and two winding cores are included in a second battery cell assembly in a ninth embodiment of the present invention.
Reference numerals in the schematic drawings illustrate:
10. a cell assembly; 101. a winding core; 101a, a first winding core; 101b, a second winding core; 102. a positive electrode tab; 103. a negative electrode ear; 104. protective adhesive tape; 105. pre-welding; 106. a protective sheet; 107. a connecting sheet; 1071. a positive electrode connecting sheet; 1072. a negative electrode connecting sheet; 108. final welding; 109. a transfer sheet; 1091. a positive electrode switching piece; 1092. a negative electrode switching sheet; 1010. an insulating film; 1011. laser welding; 20. a positive electrode cover plate; 30. a negative electrode cover plate; 40. an aluminum shell.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings. What has been described herein is merely a preferred embodiment according to the present invention, and other ways of implementing the invention will occur to those skilled in the art on the basis of the preferred embodiment, and are within the scope of the invention.
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
Example 1
The present embodiment provides a cell structure, as shown in fig. 1, for convenience of description, according to the definition X, Y and Z directions shown in fig. 1, wherein the length direction of the winding core 101 is the X direction, the width direction is the Y direction, and the height direction is the Z direction. The above directional definitions are for ease of explanation only and are not meant as limitations of the present invention.
1-7, a cell structure includes a cell assembly 10, the cell assembly 10 including a first cell assembly and a second cell assembly. The first cell assembly comprises a first winding core 101a, and a positive electrode lug 102 and a negative electrode lug 103 which are positioned on one side of the first winding core 101 a. The second cell assembly comprises a second winding core 101b, and a positive electrode lug 102 and a negative electrode lug 103 which are positioned on one side of the second winding core 101 b. Specifically, the positive electrode lug and the negative electrode lug of the first cell assembly and the second cell assembly are both positioned on the XZ side face of the winding core. When the first cell assembly is connected with the second cell assembly, the tab is connected with the tab through the connecting sheet 107, and the connecting sheet 107 is divided into a positive connecting sheet 1071 and a negative connecting sheet 1072. When the battery cell is specifically connected, the positive electrode lug of the first battery cell assembly is opposite to the positive electrode lug of the second battery cell assembly and is connected with the positive electrode connecting sheet 1071, and the negative electrode lug of the first battery cell assembly is opposite to the negative electrode lug of the second battery cell assembly and is connected with the negative electrode connecting sheet 1072.
In this embodiment, as shown in fig. 3, after the first cell assembly and the second cell assembly are connected by the connecting piece 107, the two pairs of XY surfaces of the first cell assembly and the second cell assembly are aligned, and the first cell assembly and the second cell assembly are axisymmetric with respect to the middle position where the first cell assembly and the second cell assembly are connected. Meanwhile, the positive electrode connecting piece 1071 is attached to the surfaces of the two positive electrode lugs 102 and the XY surface of the first winding core 101a, the negative electrode connecting piece 1072 is attached to the surfaces of the two negative electrode lugs 103 and the XY surface of the first winding core 101a, and the positive electrode lugs and the negative electrode lugs are in a straightening state.
As shown in fig. 8 and 9, the first winding core 101a in the first electric core component is moved in the negative direction of the Z axis, the second winding core 101b in the second electric core component is moved in the positive direction of the Z axis, the positive electrode lug and the negative electrode lug are bent at the root parts thereof, and the positions of the first electric core component and the second electric core component are staggered with each other in the winding core height direction, so as to form the electric core structure in the embodiment, wherein the connection part of the electrode lug and the winding core is the root part of the electrode lug. After the positions of the positive electrode tab 1071 and the negative electrode tab 1072 are staggered, the surfaces of the positive electrode tab 1071 and the negative electrode tab are perpendicular to each other, and the positive electrode tab and the negative electrode tab are attached to the XZ end surface of the winding core. And the first cell assembly and the second cell assembly are offset from each other by a distance of one thickness of the winding core 101.
In this embodiment, the root portions of the positive tab 102 and the negative tab 103 of the first and second cell assemblies are located at one side close to the XY plane, and the negative tab 103 is closer to one end of the winding core than the positive tab 102, i.e. the positive tab 102 is located at the inner side of the negative tab 103.
Before the first cell assembly and the second cell assembly are connected, the positive electrode lug 102 and the negative electrode lug 103 are respectively pre-welded together to obtain pre-welding marks 105, and protective adhesive tapes 104 are respectively attached to the root parts of the electrode lugs. In the present embodiment, the specific welding method is not limited, but ultrasonic welding is preferably used.
In this embodiment, when the first and second battery cell assemblies are connected in pairs, the protection sheet 106 and the connection sheet 107 are respectively disposed above and below the corresponding tab, and then the three are welded together to obtain the final welding mark 108, and the protection adhesive tapes 104 are respectively attached to the final welding mark 108. The materials of the positive electrode lug 102, the corresponding protection sheet 106 and the connecting sheet 1071 are all aluminum, and the materials of the negative electrode lug 103, the corresponding protection sheet 106 and the connecting sheet 1072 are all copper. Similarly, the welding method is not limited to a specific welding method, but ultrasonic welding is preferable.
In some cases, in this embodiment, the number of winding cores in the first cell assembly or the second cell assembly is plural. When the number of the winding cores in the first battery cell assembly or the second battery cell assembly is multiple, the multiple winding cores jointly lead out a positive electrode lug and a negative electrode lug.
Example two
Referring to fig. 19 and 20, this embodiment provides another cell structure, and in this embodiment, unlike in the first embodiment, in this embodiment, the positive tab 102 and the negative tab 103 of the first cell assembly and the second cell assembly are both located on a side close to the XY plane, but the positive tab 102 is located closer to one end of the winding core than the negative tab 103, that is, the positive tab 102 is located outside the negative tab 103.
In this embodiment, after the first battery cell assembly and the second battery cell assembly are connected in a pairing manner, the positive electrode connecting piece 1071 is attached to the surfaces of the two positive electrode tabs 102 and the XY surface of the second winding core 101b, and the negative electrode connecting piece 1072 is attached to the surfaces of the two negative electrode tabs 103 and the XY surface of the second winding core 101 b. When the battery cell is staggered, the first winding core 101a in the first battery cell assembly is moved forwards along the Z axis, the second winding core 101b in the second battery cell assembly is moved backwards along the Z axis, the positive electrode lug 102 and the negative electrode lug 103 are bent at the root parts of the positive electrode lug and the negative electrode lug, and the positions of the first battery cell assembly and the second battery cell assembly are staggered in the height direction of the winding core, so that the battery cell structure in the embodiment is formed.
Other structures of the cell structure in this embodiment are the same as those in the first embodiment, and will not be described here again.
Example III
Referring to fig. 23, another cell structure is provided in this embodiment, which is different from the first embodiment in that in this embodiment, the positive electrode tab 102 is located inside the negative electrode tab 103, or the positive electrode tab 102 is located outside the negative electrode tab 103, which may be both.
In this embodiment, after the first battery cell assembly and the second battery cell assembly are connected in a pairing manner, the bonding position of the bonding pad 107 is not limited, and the bonding pad 107 may be bonded to the XY surface of the first winding core 101a or may be bonded to the XY surface of the second winding core 101 b. As shown in fig. 23, after the first cell assembly and the second cell assembly are connected in pairs, the connecting piece 107 is attached to the XY surface of the first winding core 101 a. When the battery core is staggered, the first winding core 101a in the first battery core component moves positively in the Z axis, the second winding core 101b in the second battery core component moves negatively in the Z axis, the positive electrode lug and the negative electrode lug are bent at the root parts of the positive electrode lug and the negative electrode lug, and the positions of the first battery core component and the second battery core component are staggered in the height direction of the winding cores, so that the battery core structure in the embodiment is formed. In this embodiment, the same first and second cell assemblies are offset from each other by a thickness of one winding core 101.
It should be emphasized that in this embodiment, when the first cell assembly and the second cell assembly are connected in pairs, before the positive electrode tab and the negative electrode tab are bent at their root portions, the first cell assembly and the second cell assembly are already staggered in the thickness direction of the winding core, only one of the two pairs of XY surfaces of the first cell assembly and the second cell assembly is aligned, and the first cell assembly and the second cell assembly are centrosymmetric with respect to the middle position where they are connected.
Other structures of the cell structure in this embodiment are the same as those in the first embodiment, and will not be described here again.
Example IV
In this embodiment, a method for manufacturing a cell structure in the first embodiment, the second embodiment, or the third embodiment is provided, including the following steps:
step one: aligning the positive electrode lug of the first cell assembly with the positive electrode lug of the second cell assembly, and connecting the positive electrode lug with the positive electrode connecting sheet 1071; aligning the negative electrode lug of the first cell assembly with the negative electrode lug of the second cell assembly and connecting the negative electrode lugs with the negative electrode connecting pieces 1072;
step two: the first battery cell assembly and the second battery cell assembly move along the height direction of the winding core, namely move along the Z-axis direction, the positive electrode lug and the negative electrode lug are bent at the root parts of the positive electrode lug and the negative electrode lug, so that the positive electrode lug and the negative electrode lug are attached to one of the end faces of the winding core, and meanwhile, the positions of the first battery cell assembly and the second battery cell assembly are staggered.
In this embodiment, after the first and second battery cell assemblies in the first step are aligned and connected, before the root portions of the positive tab 102 and the negative tab 103 are bent, the first and second battery cell assemblies are axisymmetric or centrosymmetric along the connection center thereof. And in the second step, when the first battery cell assembly and the second battery cell assembly are in dislocation movement, the movement directions of the first battery cell assembly and the second battery cell assembly are opposite.
Before the first step, the positive electrode tab 102 and the negative electrode tab 103 are respectively pre-welded together to obtain pre-welded marks 105, and protective tapes 104 are respectively attached to the root parts of the electrode tabs. In the first step, when the first and second battery cell assemblies are connected in pairs, the protection sheet 106 and the connection sheet 107 are respectively placed above and below the corresponding tab, and then the three are welded together to obtain the final welding mark 108, and the protection adhesive tapes 104 are respectively attached to the final welding mark 108.
Example five
The embodiment provides a lithium battery device, which comprises two groups of battery cell structures in the first embodiment, wherein the two groups of battery cell structures are overlapped together in a mutually crossed matching way along the gap between the first battery cell assembly and the second battery cell assembly in a staggered way. Specifically, as shown in fig. 10, after one group of cell structures rotates 180 ° in the XY plane, the two groups of cell structures are overlapped together in a mutually crossed fit along the gap where the first cell assembly and the second cell assembly are connected in a staggered manner, so as to form the lithium battery device in this embodiment, as shown in fig. 11. As shown in fig. 12, in the lithium battery device in this embodiment, the orientations of the tabs in each of the battery cell assemblies are consistent, and are all located at the negative orientation in the Z-axis direction.
Referring to fig. 13-18, in this embodiment, after two sets of cell structures are stacked in a cross manner, the positive electrode connecting piece 1071 and the negative electrode connecting piece 1072 extend out and are located on the same side of the lithium battery device, and the positive electrode connecting pieces 1071 of the two sets of cell structures are close to each other. The positive connection piece 1071 and the negative connection piece 1072 are both connected with the transfer piece 109, and the transfer piece 109 is divided into a positive transfer piece 1091 and a negative transfer piece 1092, wherein the positive transfer piece 1091 is made of aluminum, and the negative transfer piece 1092 is made of copper. Specifically, the positive connection pieces 1071 of the two groups of cell structures are connected with the positive connection piece 1091, and the negative connection pieces 1072 of the two groups of cell structures are connected with the negative connection piece 1092. The end of the positive electrode transfer sheet 1091, which is not connected with the positive electrode connection sheet 1071, extends out of the lithium battery device, the end of the negative electrode transfer sheet 1092, which is not connected with the negative electrode connection sheet 1072, extends out of the lithium battery device, the directions of the positive electrode transfer sheet 1091 and the negative electrode transfer sheet 1092 are opposite, and the positive electrode transfer sheet 1091, the negative electrode transfer sheet 1092 and the surface of the winding core are attached together. One end of the positive electrode transfer sheet 1091 extending out of the lithium battery device is connected with the positive electrode cover plate 20, and one end of the negative electrode transfer sheet 1092 extending out of the lithium battery device is connected with the negative electrode cover plate 30.
In this embodiment, after the positive electrode connecting piece 1071 is welded to the positive electrode adapting piece 1091, the negative electrode connecting piece 1072 is welded to the negative electrode adapting piece 1092, and then a laser welding mark 1011 is formed at the welded joint, and the protective tape 104 needs to be attached to the laser welding mark 1011. Then, the positive electrode connecting piece 1071 and the positive electrode adapting piece 1091 are folded onto the winding core 101 together, so that the adapting piece 109 is attached to the surface of the winding core 101; the same negative electrode tab 1072 is folded onto the core 101 together with the negative electrode tab 1092 in the other direction and is attached to the surface of the core 101. The present embodiment is not limited to a specific welding method, but laser welding is preferably used.
In this embodiment, after the positive electrode transfer sheet 1091 and the negative electrode transfer sheet 1092 are folded onto the surface of the winding core, the outside of the lithium battery device is covered with the insulating film 1010, and then placed in the aluminum case 40. The insulating film 1010 serves to fix the two sets of cell structures and prevent the cells from being scratched during the subsequent placement into the aluminum case 40.
The positive electrode transfer sheet 1091 is connected with the positive electrode cover plate 20 through laser welding, the negative electrode transfer sheet 1092 is connected with the negative electrode cover plate 30 through laser welding, the welded positive electrode cover plate 20 and negative electrode cover plate 30 are respectively folded by 90 degrees and buckled with the aluminum shell 40, and finally, welding is completed through laser, so that the lithium battery device in the embodiment is finally formed, as shown in fig. 18.
In some cases, the two sets of cell structures in the second embodiment may also be stacked together in a staggered fashion. In this case, after the two sets of cell structures are overlapped in a crossing manner, the positive electrode connecting piece 1071 and the negative electrode connecting piece 1072 extend out and are located on the same side of the lithium battery device, and the negative electrode connecting pieces 1072 of the two sets of cell structures are close to each other.
Example six
In combination with fig. 21 and fig. 22, unlike the fifth embodiment, another lithium battery device is provided in this embodiment, which includes a set of the first cell structures and a set of the second cell structures in the first embodiment, and the two sets of the cell structures are overlapped in a mutually crossed fit along the gaps where the first cell assembly and the second cell assembly are connected in a staggered manner. And after the two groups of cell structures rotate 180 degrees in an XY plane, the two groups of cell structures are overlapped together in a mutually crossed matching way along the gap between the first cell assembly and the second cell assembly in a staggered way, so that the lithium battery device in the embodiment is formed. In this embodiment, after the two groups of cell structures are overlapped in a crossing manner, the positive electrode connecting piece 1071 and the negative electrode connecting piece 1072 extend out and are located on the same side of the lithium battery device, and the positions of the positive electrode connecting piece 1071 and the negative electrode connecting piece 1072 are crossed with each other.
Other structures and formation manners of the lithium battery device in this embodiment are the same as those in the fifth embodiment, and are not described here again.
Example seven
Referring to fig. 24, another lithium battery device is provided in this embodiment, which includes two sets of cell structures in the third embodiment, where the two sets of cell structures are overlapped together in a mutually crossing fit along the gaps where the first cell assembly and the second cell assembly are connected in a staggered manner. In the lithium battery device in this embodiment, the position of the pole root portion of the upper-layer battery cell assembly is different from the position of the pole root portion of the lower-layer battery cell assembly, and the position of the pole root portion of the upper-layer battery cell assembly is close to the positive position in the Z-axis direction, and the position of the pole root portion of the lower-layer battery cell assembly is close to the negative position in the Z-axis direction.
Other structures and formation manners of the lithium battery device in this embodiment are the same as those in the fifth embodiment, and are not described here again.
Example eight
Referring to fig. 25, another lithium battery device is provided in this embodiment, and in some embodiments, a plurality of winding cores are provided in the first cell assembly or the second cell assembly. In this embodiment, the first battery cell assembly includes one winding core, and the second battery cell assembly includes two winding cores. The positive lugs in the two winding cores in the second battery cell assembly are pre-welded into one positive lug, the negative lugs in the two winding cores are pre-welded into one negative lug, and then the first battery cell assembly and the second battery cell assembly are connected in a pairing mode, and the connection structure and the connection method are consistent with those in the first embodiment and the fourth embodiment, so that the battery cell structure in the embodiment is formed.
The two groups of cell structures in the embodiment are overlapped together in a mutually crossed matching way along the gaps of the dislocation connection of the first cell component and the second cell component to form the lithium battery device, and other structures and forming modes are consistent with those in the fifth embodiment.
Example nine
Referring to fig. 26, another lithium battery device is provided in this embodiment, and in some embodiments, a plurality of winding cores are provided in the first cell assembly or the second cell assembly. In this embodiment, the first battery cell assembly includes two winding cores, and the second battery cell assembly includes two winding cores. Pre-welding positive lugs in two winding cores in the first battery cell assembly into a positive lug, and pre-welding negative lugs in the two winding cores into a negative lug; the positive lugs in the two winding cores in the second battery cell assembly are pre-welded into one positive lug, the negative lugs in the two winding cores are pre-welded into one negative lug, and then the first battery cell assembly and the second battery cell assembly are connected in a pairing mode, and the connection structure and the connection method are consistent with those in the first embodiment and the fourth embodiment, so that the battery cell structure in the embodiment is formed.
The two groups of cell structures in the embodiment are overlapped together in a mutually crossed matching way along the gaps of the dislocation connection of the first cell component and the second cell component to form the lithium battery device, and other structures and forming modes are consistent with those in the fifth embodiment.
Examples ten
In this embodiment, a method for manufacturing a lithium battery device in the sixth embodiment, the seventh embodiment, the eighth embodiment, or the ninth embodiment is provided, including the following steps:
step one: the two groups of cell structures are overlapped together in a mutually crossed matching way along the gaps of dislocation connection of the first cell component and the second cell component to form a square multi-coil core parallel structure;
step two: after the two groups of cell structures are overlapped in a crossing manner, the positive electrode connecting sheet 1071 and the negative electrode connecting sheet 1072 extend out and are positioned on the same side of the lithium battery device, the positive electrode connecting sheet 1071 and the positive electrode switching sheet 1091 of the two groups of cell structures are connected together, the positive electrode switching sheet 1091 is bent towards the direction close to the winding core, and the positive electrode switching sheet 1091 is attached to the surface of the winding core;
connecting the two groups of negative electrode connecting pieces 1072 and the negative electrode switching pieces 1092 of the battery core structure together, bending the negative electrode switching pieces 1092 towards the direction close to the winding core, and enabling the negative electrode switching pieces 1092 to be attached to the surface of the winding core;
step three: one end of the positive electrode adapter plate 1091 is connected with the positive electrode cover plate 20, and the positive electrode cover plate 20 is folded to be attached to the end face of the winding core; one end of the negative electrode adapter 1092 is connected with the negative electrode cover plate 30, and the negative electrode cover plate 30 is folded over to be attached to the end face of the winding core.
Specifically, in the first embodiment, before two groups of cell structures are overlapped in a crossing manner, one group of cell structures needs to be in an XY plane, and after the cell structures rotate 180 degrees, the two groups of cell structures are overlapped in a crossing manner along the gap between the first cell assembly and the second cell assembly in a staggered manner, so that a square multi-coil core parallel structure is formed. In the second step, after the positive electrode connecting piece 1071 is welded to the positive electrode adapting piece 1091, the negative electrode connecting piece 1072 is welded to the negative electrode adapting piece 1092, and then a laser welding mark 1011 is formed at the welded joint, and the protective adhesive tape 104 needs to be attached to the laser welding mark 1011. Between the second and third steps, the outside of the lithium battery device is required to be covered with an insulating film 1010, which is then placed in an aluminum case 40. In the third step, the welded positive electrode cover plate 20 and negative electrode cover plate 30 are respectively folded by 90 degrees and buckled with the aluminum shell 40, and finally the welding is completed through laser.
Although the above embodiments only exemplify some specific forms of the battery cell structures and forms of the lithium battery cell devices, the battery cell structures and the lithium battery cell devices in the present invention are not limited to the modes in the above embodiments, and other battery cell structures in different forms and different numbers can be derived by combining the above embodiments according to the present invention, so as to form different lithium battery cell devices.
The invention and its embodiments have been described above by way of illustration and not limitation, and the invention is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present invention.
Claims (10)
1. The utility model provides a electricity core structure which characterized in that: comprising the steps of (a) a step of,
the battery cell assembly (10), the battery cell assembly (10) comprises a first battery cell assembly and a second battery cell assembly, the first battery cell assembly comprises a plurality of first winding cores (101 a), and positive electrode lugs (102) and negative electrode lugs (103) which are positioned on one side of the first winding cores (101 a);
the second battery core assembly comprises a plurality of second battery cores (101 b), and positive electrode lugs (102) and negative electrode lugs (103) which are positioned on one side of the second battery cores (101 b);
the positive electrode lug (102) of the first cell assembly is opposite to the positive electrode lug (102) of the second cell assembly and is connected with the positive electrode connecting sheet (1071), and the negative electrode lug (103) of the first cell assembly is opposite to the negative electrode lug (103) of the second cell assembly and is connected with the negative electrode connecting sheet (1072);
the positive electrode lug (102) and the negative electrode lug (103) are bent at the root parts of the positive electrode lug and the negative electrode lug, so that the positions of the first battery cell assembly and the second battery cell assembly are staggered in the height direction of the winding core.
2. A cell structure according to claim 1, wherein: when the number of the winding cores in the first battery cell assembly or the second battery cell assembly is multiple, one positive electrode lug (102) and one negative electrode lug (103) are led out from the winding cores together.
3. A cell structure according to claim 1 or 2, characterized in that: the positive electrode connecting sheet (1071) and the negative electrode connecting sheet (1072) are perpendicular to the surface of the winding core.
4. A method for manufacturing a cell structure according to any one of claims 1-3, comprising the steps of:
step one: aligning the positive electrode lug (102) of the first cell assembly and the positive electrode lug (102) of the second cell assembly, and connecting the positive electrode lug and the positive electrode lug with a positive electrode connecting sheet (1071); aligning the negative electrode lug (103) of the first cell assembly with the negative electrode lug (103) of the second cell assembly, and connecting the negative electrode lugs with a negative electrode connecting sheet (1072);
step two: the first battery cell assembly and the second battery cell assembly are moved along the height direction of the winding core, the positive electrode lug (102) and the negative electrode lug (103) are bent at the root parts of the positive electrode lug and the negative electrode lug, the surfaces of the positive electrode lug (102) and the negative electrode lug (103) are attached to one winding core, and meanwhile, the positions of the first battery cell assembly and the second battery cell assembly are staggered.
5. The method for manufacturing a cell structure according to claim 4, wherein: after the first cell assembly and the second cell assembly in the first step are aligned and connected, before the root parts of the positive electrode lug (102) and the negative electrode lug (103) are bent, the first cell assembly and the second cell assembly are in axisymmetry or centrosymmetric along the connection middle of the first cell assembly and the second cell assembly; and in the second step, when the first battery cell assembly and the second battery cell assembly are in dislocation movement, the movement directions of the first battery cell assembly and the second battery cell assembly are opposite.
6. A lithium battery device characterized by comprising two groups of one cell structure according to claims 1-5, wherein the two groups of cell structures are overlapped together in a mutually crossed fit along the gaps where the first cell assembly and the second cell assembly are connected in a staggered manner.
7. The lithium battery device according to claim 6, wherein: the positive electrode connecting piece (1071) and the negative electrode connecting piece (1072) extend out and are positioned on the same side of the lithium battery device.
8. The lithium battery device according to claim 7, wherein: two sets of positive connection piece (1071) of electric core structure all are connected with positive connection piece (1091), two sets of negative connection piece (1072) of electric core structure all are connected with negative connection piece (1092), lithium cell device is stretched out to one end that positive connection piece (1091) was not connected with positive connection piece (1071), lithium cell device is stretched out to one end that negative connection piece (1092) was not connected with negative connection piece (1072), just positive connection piece (1091) and negative connection piece (1092) are in the same place with rolling up core surface laminating.
9. The lithium battery device according to claim 8, wherein: one end of the positive electrode rotating sheet (1091) extending out of the lithium battery device is connected with the positive electrode cover plate (20), and one end of the negative electrode rotating sheet (1092) extending out of the lithium battery device is connected with the negative electrode cover plate (30).
10. A method for manufacturing a lithium battery device, for manufacturing a lithium battery device according to claim 9, characterized in that: step one: the two groups of the battery core structures are overlapped together in a mutually crossed matching way along the gaps formed by the dislocation connection of the first battery core component and the second battery core component, so that a square multi-coil core parallel structure is formed;
step two: after the two groups of cell structures are overlapped in a crossing manner, the positive electrode connecting sheet (1071) and the negative electrode connecting sheet (1072) extend out and are positioned on the same side of the lithium battery device, the positive electrode connecting sheets (1071) and the positive electrode rotating sheets (1091) of the two groups of cell structures are connected together, the positive electrode rotating sheets (1091) are bent towards the direction close to the winding core, and the positive electrode rotating sheets (1091) are attached to the surface of the winding core;
connecting the two groups of negative electrode connecting pieces (1072) of the battery core structure with the negative electrode connecting pieces (1092), bending the negative electrode connecting pieces (1092) towards the direction close to the winding core, and enabling the negative electrode connecting pieces (1092) to be attached to the surface of the winding core;
step three: one end of the positive electrode rotating sheet (1091) is connected with the positive electrode cover plate (20), and the positive electrode cover plate (20) is folded to be attached to the end face of the winding core; one end of the negative electrode switching sheet (1092) is connected with the negative electrode cover plate (30), and the negative electrode cover plate (30) is folded to be attached to the end face of the winding core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310201040.1A CN116344913A (en) | 2023-02-28 | 2023-02-28 | Battery cell structure, lithium battery device and manufacturing method of battery cell structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310201040.1A CN116344913A (en) | 2023-02-28 | 2023-02-28 | Battery cell structure, lithium battery device and manufacturing method of battery cell structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116344913A true CN116344913A (en) | 2023-06-27 |
Family
ID=86888599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310201040.1A Pending CN116344913A (en) | 2023-02-28 | 2023-02-28 | Battery cell structure, lithium battery device and manufacturing method of battery cell structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116344913A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117936875A (en) * | 2024-03-14 | 2024-04-26 | 宁德时代新能源科技股份有限公司 | Pairing device and pairing method |
-
2023
- 2023-02-28 CN CN202310201040.1A patent/CN116344913A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117936875A (en) * | 2024-03-14 | 2024-04-26 | 宁德时代新能源科技股份有限公司 | Pairing device and pairing method |
| CN117936875B (en) * | 2024-03-14 | 2024-08-20 | 宁德时代新能源科技股份有限公司 | Pairing device and pairing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101322264B (en) | Method of preparing battery core pack | |
| CN103119753B (en) | Battery pack with high output and large capacity | |
| CN209515763U (en) | Battery unit and battery modules including the battery unit | |
| CN112952300A (en) | Battery core, battery core assembly, battery and device using battery | |
| CN102024988A (en) | Coiled lithium-ion power battery core and manufacturing method thereof | |
| EP3686949A1 (en) | Secondary battery and battery module | |
| EP3872892B1 (en) | Current collector and secondary battery | |
| CN112864534B (en) | Battery cell assembly, battery cell module, battery and device using battery | |
| CN116344913A (en) | Battery cell structure, lithium battery device and manufacturing method of battery cell structure | |
| CN114975864A (en) | Pole piece, electric core structure, lithium battery and electronic equipment | |
| CN216488280U (en) | Electric core with novel battery cover plate connecting structure | |
| WO2024087957A1 (en) | Wound battery cell, battery, battery assembly, and electrical apparatus | |
| WO2022170451A1 (en) | Cell and electronic device using same | |
| US20210257649A1 (en) | Secondary battery having improved current-collecting structure | |
| WO2024065146A1 (en) | Battery cell, battery cell production method, battery and electric device | |
| CN218414703U (en) | Battery core connecting assembly and battery | |
| US20220085465A1 (en) | Current collecting member and manufacturing method thereof, secondary battery and manufacturing method thereof, battery module, and apparatus | |
| CN214848952U (en) | Battery core, battery core assembly, battery and device using battery | |
| CN114709569A (en) | Multi-cell lithium battery structure | |
| KR20230132552A (en) | Electrode assembly and manufacturing method thereof, battery cell, battery and electrical device | |
| CN201845835U (en) | Coiled lithium ion power battery cell | |
| CN220368102U (en) | Battery cell connection structure and battery cell | |
| CN221885325U (en) | Cylindrical battery | |
| CN221427809U (en) | Bare cell structure and blade cell | |
| CN221282176U (en) | Bare cell and square battery |
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 |