CN113394372B - Battery cell and preparation method thereof and battery - Google Patents
Battery cell and preparation method thereof and battery Download PDFInfo
- Publication number
- CN113394372B CN113394372B CN202110729085.7A CN202110729085A CN113394372B CN 113394372 B CN113394372 B CN 113394372B CN 202110729085 A CN202110729085 A CN 202110729085A CN 113394372 B CN113394372 B CN 113394372B
- Authority
- CN
- China
- Prior art keywords
- electrode sheet
- battery
- shaped
- electrode
- 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.)
- Active
Links
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000005452 bending Methods 0.000 claims description 21
- JDZCKJOXGCMJGS-UHFFFAOYSA-N [Li].[S] Chemical compound [Li].[S] JDZCKJOXGCMJGS-UHFFFAOYSA-N 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 9
- 229910052744 lithium Inorganic materials 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000012528 membrane Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/134—Electrodes based on metals, Si or alloys
-
- 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)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
- Primary Cells (AREA)
Abstract
本发明公开了一种电芯及其制备方法和电池。本发明电芯包括层叠设置的至少一电堆电芯单元；电堆电芯单元包括第一电极片、第二电极片和隔膜；其中，第一电极片和第二电极片均为U形或V形的折页结构；所述第一电极片的一端部插接至所述第二电极片的U形或V形间隙内，所述第二电极片的一端部插接至所述第一电极片的U形或V形间隙内；且所述隔膜贴合在所述第一电极片与所述第二电极片之间以隔绝所述第一电极片与所述第二电极片。电池含有本发明电芯。电芯的欧姆电阻低，安全性能高。
The present invention discloses a battery cell, a preparation method thereof and a battery. The battery cell of the present invention comprises at least one stacked battery cell unit; the stacked battery cell unit comprises a first electrode sheet, a second electrode sheet and a diaphragm; wherein the first electrode sheet and the second electrode sheet are both U-shaped or V-shaped folding structures; one end of the first electrode sheet is inserted into the U-shaped or V-shaped gap of the second electrode sheet, and one end of the second electrode sheet is inserted into the U-shaped or V-shaped gap of the first electrode sheet; and the diaphragm is attached between the first electrode sheet and the second electrode sheet to isolate the first electrode sheet from the second electrode sheet. The battery contains the battery cell of the present invention. The battery cell has low ohmic resistance and high safety performance.
Description
Technical Field
The invention belongs to the field of batteries, and particularly relates to a battery cell, a preparation method thereof and a battery.
Background
The battery is used as an energy storage device and mainly comprises a positive electrode, a negative electrode, a diaphragm and electrolyte. The positive electrode, the diaphragm and the negative electrode are sequentially laminated to form a sandwich structure so as to form the battery cell. Besides the material and performance of the positive electrode, the negative electrode, the diaphragm and the electrolyte play a critical role in electrochemical performance and safety performance of battery circulation and the like, the structure of the battery core plays a critical role in electrochemical performance and safety performance and the like.
Conventional batteries, such as secondary batteries, typically contain cells that are of laminated construction, such as where the positive and negative electrode sheets must be cut to the desired shape prior to assembly of the lithium sulfur battery, and then the cells will be formed in accordance with the positive/separator/negative laminate. Therefore, all the positive plate current collectors and all the negative plates are connected only by welding at the lugs, so that the ohmic resistance of the whole positive electrode system or the negative electrode system is large, the lugs are easy to generate heat and heat at the joints in the charging and discharging process of the battery, and the battery is affected in performance and hidden danger.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a battery cell and a preparation method thereof, so as to solve the technical problems of high resistance and safety caused by the fact that the traditional laminated battery cells are connected through tab welding.
Another object of the present invention is to provide a battery to solve the technical problem that the electrochemical performance and the safety of the existing battery are not ideal due to the existing stacked battery cells.
In order to achieve the above object, according to an aspect of the present invention, a battery cell is provided. The battery cell comprises at least one electric pile battery cell unit which is arranged in a laminated way, wherein the electric pile battery cell unit comprises a first electrode plate, a second electrode plate and a diaphragm, and the first electrode plate and the second electrode plate are both U-shaped or V-shaped hinge structures;
one end part of the first electrode plate is inserted into the U-shaped or V-shaped gap of the second electrode plate, and one end part of the second electrode plate is inserted into the U-shaped or V-shaped gap of the first electrode plate;
And the diaphragm is attached between the first electrode plate and the second electrode plate to isolate the first electrode plate from the second electrode plate.
In another aspect of the invention, a method of making the cell of the invention is provided. The battery cell of the invention comprises the following steps:
Obtaining a first electrode slice body, wherein the first electrode slice body comprises at least one electrode slice, and the electrode slice is subjected to U-shaped or V-shaped folding treatment to form at least one U-shaped or V-shaped first electrode slice with a folding structure;
obtaining a second electrode slice body, wherein the second electrode slice body comprises at least one electrode slice, and the electrode slice is subjected to U-shaped or V-shaped folding treatment to form at least one U-shaped or V-shaped second electrode slice with a folding structure;
At least attaching a diaphragm to the surfaces of the two end parts of each of the first electrode plate and the second electrode plate;
According to the first electrode plate and the second electrode plate which are one group, one end part of the first electrode plate of each group is inserted into a U-shaped or V-shaped gap of the second electrode plate, and one end part of the second electrode plate is inserted into the U-shaped or V-shaped gap of the first electrode plate at the same time, so that at least one electric pile cell unit is assembled;
And assembling at least one cell stack cell unit into a cell.
In yet another aspect of the present invention, a battery is also provided. The battery comprises a battery core, wherein the battery core is the battery core or prepared by the battery core preparation method.
Compared with the prior art, the invention has the following technical effects:
According to the battery cell, the first electrode plate and the second electrode plate in the battery cell unit of the battery cell are arranged to be of the hinge structure, and the electrode plates of each hinge structure are integrally connected through the current collector, so that the ohmic resistance of the two electrode plates is greatly reduced, and the safety performance is improved. Through the arrangement of the structures of the first electrode plate and the second motor plate contained in each cell stack cell unit, the two electrode plates play a role in synergy, so that the ohmic resistance of the cell is effectively reduced, the high safety performance of the cell is endowed, the defect of high resistance of the existing laminated cell is effectively overcome, and the cell is suitable for a high-capacity battery.
According to the battery cell preparation method, the first electrode plate body and the second electrode plate body are directly folded according to the battery cell structure to form the first electrode plate and the second electrode plate which are of U-shaped or V-shaped hinge structures respectively, and the first electrode plate and the second electrode plate are arranged as a battery cell unit, so that the prepared battery cell has the characteristics of low ohmic resistance and high safety, and the preparation method of the battery cell is easy to control, and the prepared battery cell is stable in quality and performance and high in efficiency.
The battery cell contained in the battery is the battery cell of the invention, so that the battery of the invention has small internal resistance, excellent multiplying power performance and high safety, and can be a high-capacity battery.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a cell stack unit included in a cell according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a stacked cell structure formed by stacking two or more of the cell units shown in FIG. 1;
fig. 3 is a schematic view of a first electrode sheet body and a U-shaped or V-shaped folded structure formed by U-shaped or V-shaped folding treatment, wherein a is a schematic view of the structure of the first electrode sheet body before the U-shaped or V-shaped folding treatment, and b is a schematic view of the structure of the first electrode sheet with the folded structure;
fig. 4 is a schematic structural diagram of a lithium-sulfur soft pack battery according to an embodiment of the present invention.
Description of the component numbers in the drawings:
1 '-one section of electrode plate of the first electrode plate body, 1-the first electrode plate, 11-one folding part of the first electrode plate, 12-the other folding part of the first electrode plate, 13-the bending part of the first electrode plate, 14-the electrode lug of the first electrode plate 1 and 15-the bending line of the electrode plate 1' for U-shaped or V-shaped folding treatment;
2-a second electrode plate, 21-one folding part of the second electrode plate, 22-the other folding part of the second electrode plate and 23-the bending part of the second electrode plate;
3-separator.
Detailed Description
For the purpose of making the objects, technical solutions and technical effects of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described, and the embodiments described below are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art without the benefit of the teachings of this invention, are intended to be within the scope of the invention. The specific conditions are not noted in the examples, and the reagents or instruments used are conventional products available through commercial purchase, and the manufacturer is not noted.
In the description of the present invention, the term "and/or" describes an association relationship of an associated object, meaning that there may be three relationships, for example, a and/or B, and that there may be a alone, a and B together, and B alone. Wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship.
In the description of the present invention, "at least one" means one or more, and "a plurality" means two or more. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, "at least one (a), b, or c)", or "at least one (a, b, and c)", may each represent a, b, c, a-b (i.e., a and b), a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple, respectively.
In addition, the expression of a word in the singular should be understood to include the plural of the word unless the context clearly indicates otherwise. The terms "comprises" or "comprising" are intended to specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but are not intended to preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.
Explanation of related names follows:
the cell stack cell unit is a combined structure formed by stacking the first electrode plate 1, the second electrode plate 2 and the diaphragm 3 in the figure 1 according to the stacking mode of the first electrode plate 1/the diaphragm 3/the second electrode plate 2.
The cell is a structure formed by stacking a plurality of cell stack cells in fig. 1.
The U-shaped or V-shaped folding structure is that a section of electrode sheet shown in a figure of a figure in figure 3 is subjected to U-shaped or V-shaped folding treatment to form the U-shaped or V-shaped structure shown in a figure of b figure in figure 3.
The hinge part refers to two end regions of the U-shaped or V-shaped hinge structure.
The bending part refers to a bending area for connecting two adjacent folding parts.
In one aspect, an embodiment of the present invention provides a battery cell. The structure of the battery cell of the embodiment of the invention is shown in figures 1 to 3, which comprises at least one electric pile battery cell unit 01 arranged in a stacked way, wherein the electric pile battery cell unit 01 comprises a first electrode plate 1, a second electrode plate 2 and a diaphragm 3,
The first electrode sheet 1 has a structure as shown in fig. 1 and 3, which is a U-shaped or V-shaped folded structure. The U-shaped or V-shaped hinge structure includes, as shown in fig. 1,2 and 3 b, a hinge portion 11 and a hinge portion 12 at both ends, and a U-shaped or V-shaped bent portion 13 connecting the hinge portion 11 and the hinge portion 12. Wherein, folding portion 11 and folding portion 12 respectively include two folding pages of relative setting, and bending portion 13 includes convex and concave of relative setting. The first electrode plate 1 is provided with a folding structure, which is equivalent to directly integrating two electrodes contained in a traditional disc type battery cell, thereby effectively reducing the ohmic resistance of the first electrode plate.
In the embodiment of the present invention, the gap between the bending portion 13 of the first electrode sheet 1 and the two folding portions 11 and 12 is required to sandwich one bending portion of the second electrode sheet 2, so that in order to enable the bending portion 13 to better sandwich one bending portion of the second electrode sheet 2, the bending portion 13 is preferably in a U shape relative to the V shape.
The structure of the second electrode sheet 2 is similar to the structure of the first electrode sheet 1 in appearance, and is a U-shaped or V-shaped hinge structure, as shown in fig. 1 and 2. As shown in fig. 1 and 2, the U-shaped or V-shaped folding structure includes a folding portion 21 and a folding portion 22 at both ends, and a U-shaped or V-shaped folding portion 23 connecting the folding portion 21 and the folding portion 22. Wherein, the folding part 21 and the folding part 22 respectively comprise two oppositely arranged pages, and the bending part 23 comprises oppositely arranged convex surfaces and concave surfaces. The second electrode plate 2 is provided with a folding structure, which is equivalent to directly integrating two electrodes contained in the traditional disc type battery cell, thereby effectively reducing the ohmic resistance of the second electrode plate.
In the embodiment of the present invention, the gap between the bending portion 23 of the second electrode sheet 2 and the two folding portions 21 and 22 is required to sandwich one bending portion of the first electrode sheet 1, so that in order to enable the bending portion 23 to better sandwich one bending portion of the first electrode sheet 1, the bending portion 23 is preferably in a U shape relative to a V shape.
Based on the above-described structures of the first electrode sheet 1 and the second electrode sheet 2, as shown in fig. 1 and 2, one end portion of the first electrode sheet 1, that is, the folded portion 12 is inserted into a U-shaped or V-shaped gap surrounded by the folded portion 23 of the second electrode sheet 2, the two folded portions 21 and 22. One end of the second electrode plate 2 is inserted into the U-shaped or V-shaped gap of the first electrode plate. And is isolated between the first electrode sheet 1 and the second electrode sheet 2 by a diaphragm 3, thereby forming a cell unit 01 of the electric pile.
The diaphragm 3 is attached between the first electrode plate 1 and the second electrode plate 2 to isolate the first electrode plate 1 from the second electrode plate 2. Thus, the separator 3 is attached to at least the opposite two-folded page of the folding portion 11 and the opposite two-folded page of the folding portion 12 of the first electrode sheet 1 and to at least the opposite two-folded page of the folding portion 21 and the opposite two-folded page of the folding portion 22 of the second electrode sheet 2. Of course, the metal sheet may be further bonded to the convex and concave surfaces of the bent portion 13 of the first electrode sheet 1, or may be further bonded to the convex and concave surfaces of the bent portion 23 of the second electrode sheet 2. In the embodiment of the present invention, it is desirable that the separator 3 is simultaneously attached to the opposite two-folded page of the hinge portion 11 and the opposite two-folded page of the hinge portion 12 of the first electrode sheet 1 and at least to the opposite two-folded page of the hinge portion 21 and the opposite two-folded page of the hinge portion 22 of the second electrode sheet 2, and is simultaneously attached to the convex surface and the concave surface of the bent portion 13 of the first electrode sheet 1 and to the convex surface and the concave surface of the bent portion 23 of the second electrode sheet 2, so as to improve the safety and the electrochemical stability of the cell unit 01.
In a specific embodiment, the membrane 3 is a whole membrane and is attached to two opposite surfaces of the first electrode sheet 1 and the second electrode sheet 2, specifically, as shown in fig. 1, the membrane 3 is attached between the hinge portion 11 of the first electrode sheet 1 and the hinge portion 21 of the second electrode sheet 2, and the membrane 3 is attached between the hinge portion 12 of the first electrode sheet 1 and the hinge portion 22 of the second electrode sheet 2, and is also attached to convex surfaces and concave surfaces of the bending portion 13 of the first electrode sheet 1 and convex surfaces and concave surfaces of the bending portion 23 of the second electrode sheet 2. Thus, the safety of the battery cell is effectively improved.
In the battery cell according to the embodiment of the present invention, the battery cell may include only one of the above-described battery cell units 01, and of course, may include more than two of the above-described battery cell units 01. In an embodiment, the cells may contain 1 to 200, more preferably 1 to 100, still more preferably 1 to 50 of the above-described stack cells 01. In an embodiment, when the cell contains more than two cell units 01 of the above-described cell stack, the separator 3 is further attached between the adjacent cell units 01 to isolate the adjacent cell units 01. In another embodiment, when more than two cell units 01 are used to assemble the cells, each cell unit 01 is stacked in order along one extending direction. In a specific embodiment, the number of the cell units 01 of the electric pile assembled with the cell can be controlled according to specific needs.
Like this, in pile cell unit 01, first electrode piece 1 and second electrode piece 2 set up to fold paper structure, and both peg graft and fold and establish, carry out the whole continuous through the mass flow body in each fold paper structure electrode piece to very big reduction the ohmic resistance of two electrode pieces, also improved the security performance. Through the arrangement of the structures of the first electrode plate 1 and the second motor plate 2 contained in each cell stack cell unit 01, the two electrode plates play a role in synergy, the ohmic resistance of the cell is effectively reduced, the high safety performance of the cell is endowed, the defect of high resistance of the existing laminated cell is effectively overcome, and the cell is suitable for a large-capacity battery.
Based on the structure of the cell unit 01 of the pile in each embodiment, as an embodiment of the present invention, one of the first electrode sheet 1 and the second electrode sheet 2 is a positive electrode sheet, and the other electrode sheet is a negative electrode sheet. In the specific embodiment, the first electrode sheet 1 is a positive electrode sheet, and the second electrode sheet 2 is a negative electrode sheet.
In the embodiment, when one of the electrode plates, for example, the first electrode plate 1, in the cell stack unit 01 is a positive electrode plate, in a specific embodiment, the positive electrode plate is a positive electrode plate of a lithium sulfur battery, and the positive electrode plate of the specific lithium sulfur battery includes a current collector and a positive electrode material layer containing active sulfur material and conductive material formed on the surface of the current collector. When another electrode slice in the cell unit 01, such as the second electrode slice 2, is a negative electrode slice, in a specific embodiment, the negative electrode slice is a lithium metal slice. Wherein the lithium metal sheet comprises a lithium metal foil, a lithium metal alloy foil, or the like. At this time, the cell stack cell unit is a lithium sulfur battery cell unit, and then the cell forms a lithium sulfur battery cell.
Of course, in the above embodiments, the first electrode slice 1 and the second electrode slice 2 are respectively provided with a tab, and in a specific embodiment, the tab contained in the first electrode slice 1 is the tab 14 in the a diagram in fig. 3, and the tab contained in the second electrode slice 2 may be the same as or similar to the tab in the a diagram in fig. 3.
Therefore, the battery cell of each embodiment has the advantages that through the arrangement of the structures of the first electrode slice 1 and the second electrode slice 2 contained in each cell stack battery cell unit 01, the two electrode slices play a role in synergy, the ohmic resistance of the battery cell is effectively reduced, the high safety performance is endowed to the battery cell, the defect of high resistance of the existing laminated battery cell is effectively overcome, and the battery cell is suitable for a large-capacity battery.
Correspondingly, the embodiment of the invention also provides a preparation method of the battery cell. The preparation method of the battery cell comprises the following steps:
s01, obtaining a first electrode slice body, wherein the first electrode slice body comprises at least one electrode slice, and the electrode slice is subjected to U-shaped or V-shaped folding treatment to form at least one U-shaped or V-shaped first electrode slice with a folding structure;
s02, obtaining a second electrode plate body, wherein the second electrode plate body comprises at least one electrode plate, and the electrode plate is subjected to U-shaped or V-shaped folding treatment to form at least one U-shaped or V-shaped second electrode plate with a folding structure;
S03, attaching a diaphragm on the surface of at least two end parts of each of the first electrode plate and the second electrode plate;
S04, according to the first electrode plate and the second electrode plate which are a group, inserting one end part of the first electrode plate of each group into a U-shaped or V-shaped gap of the second electrode plate, inserting one end part of the second electrode plate into the U-shaped or V-shaped gap of the first electrode plate, and assembling at least one electric pile cell unit;
s05, assembling at least one cell stack cell unit into a cell.
The first electrode sheet body in step S01 is a sheet forming the first electrode sheet 1 in fig. 1. Wherein, each electrode sheet is subjected to U-shaped or V-shaped folding treatment as shown in a diagram in fig. 3, and one electrode sheet 1' is subjected to U-shaped or V-shaped folding treatment according to a bending line 15 to form a U-shaped or V-shaped folding structure as shown in a diagram in fig. 3 b. In addition, the first electrode tab body is the electrode tab body of the first electrode tab 1 described in the above-described battery cell. When the first electrode sheet 1 is a positive electrode sheet, particularly a lithium sulfur battery positive electrode sheet, the electrode sheet 1 'is a lithium sulfur battery positive electrode sheet, and when the first electrode sheet 1 is a negative electrode sheet, particularly a lithium metal sheet, the electrode sheet 1' is a lithium metal sheet.
In step S02, the U-shaped or V-shaped folding process is performed on the second electrode sheet body, and in step S01, the U-shaped or V-shaped folding process is performed on the first electrode sheet body. The U-shaped or V-shaped folding structure of the formed second electrode plate is the same as or similar to the U-shaped or V-shaped folding structure of the first electrode plate.
In addition, step S01 and step S02, step S01 and step S03 are not in order.
The diaphragm in the step S03 is the diaphragm 3 contained in the cell stack cell unit 01 of the cell in the embodiment of the invention, wherein the positions where the diaphragm is attached to the first electrode plate and the second electrode plate are the positions where the diaphragm 3 contained in the cell above is attached to the cell stack cell unit 01.
In step S04, the method for plugging the first electrode slice with the second electrode slice specifically plugs the first electrode slice 1 and the second electrode slice 2 included in the cell and the cell unit 01 of the electric pile shown in fig. 1 according to the plugging manner, so as to form the cell unit 01 of the electric pile.
The cell stack cells in step S05 may be assembled according to a conventional method. In an embodiment, when more than two cell stack units 01 are used to assemble a cell, adjacent cell stack units 01 are separated by a membrane 3. In the embodiment, when the cells are assembled by using two or more cell units 01, the cell units 01 are stacked one on another in one extending direction. In a specific embodiment, the number of the cell units 01 of the electric pile assembled with the cell can be controlled according to specific needs.
In this way, the method for manufacturing the battery cell directly carries out folding treatment on the first electrode plate body and the second electrode plate body according to the battery cell structure of the embodiment of the invention to respectively form the first electrode plate and the second electrode plate with U-shaped or V-shaped hinge structures, and the first electrode plate and the second electrode plate are arranged as a battery cell unit, so that the manufactured battery cell has the characteristics of low ohmic resistance and high safety, the manufacturing method process of the battery cell is easy to control, and the manufactured battery cell is stable in quality and performance and high in efficiency.
On the other hand, based on the battery cell and the preparation method thereof, the embodiment of the invention also provides a battery. The battery comprises a battery cell and, of course, necessary components of the battery, such as a battery shell for covering the battery cell, an electrolyte for acting with the battery cell, and the like. The battery cell is the battery cell of the embodiment of the invention. The battery cell is the battery cell of the embodiment of the invention, so that the battery cell of the embodiment of the invention has small internal resistance, excellent rate capability and high safety, and can be a high-capacity battery.
In the embodiment, when the first electrode slice 1 contained in the battery core is a lithium foil and the second electrode slice 2 is a positive electrode, specifically a positive electrode of a sulfur-containing battery, the battery is a lithium-sulfur battery. When the lithium sulfur battery is a lithium sulfur pouch cell, the cell structure is as shown in fig. 4. Of course, the battery of the embodiment of the present invention may be any other type of battery, and any battery including the battery cells of the embodiment of the present invention is within the scope of the disclosure of the embodiment of the present invention.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110729085.7A CN113394372B (en) | 2021-06-29 | 2021-06-29 | Battery cell and preparation method thereof and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110729085.7A CN113394372B (en) | 2021-06-29 | 2021-06-29 | Battery cell and preparation method thereof and battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113394372A CN113394372A (en) | 2021-09-14 |
| CN113394372B true CN113394372B (en) | 2025-02-11 |
Family
ID=77624443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110729085.7A Active CN113394372B (en) | 2021-06-29 | 2021-06-29 | Battery cell and preparation method thereof and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113394372B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107735896A (en) * | 2015-06-23 | 2018-02-23 | 株式会社Lg化学 | Electrode assemblie and its manufacture method for secondary cell |
| CN215377442U (en) * | 2021-06-29 | 2021-12-31 | 深圳市德方纳米科技股份有限公司 | Battery core and battery |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101543055B1 (en) * | 2011-01-14 | 2015-08-07 | 주식회사 엘지화학 | Stack and Folding-Typed Electrode Assembly Having Improved Safety Property and Method for preparation of the same |
| CN111354981A (en) * | 2020-05-22 | 2020-06-30 | 北京小米移动软件有限公司 | Battery cell structure, lithium battery and terminal equipment |
-
2021
- 2021-06-29 CN CN202110729085.7A patent/CN113394372B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107735896A (en) * | 2015-06-23 | 2018-02-23 | 株式会社Lg化学 | Electrode assemblie and its manufacture method for secondary cell |
| CN215377442U (en) * | 2021-06-29 | 2021-12-31 | 深圳市德方纳米科技股份有限公司 | Battery core and battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113394372A (en) | 2021-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108808059B (en) | Laminated secondary battery based on cross stacking and preparation method thereof | |
| EP1175709B1 (en) | Stacked electrochemical cell | |
| JP5290952B2 (en) | High safety multilayer electrochemical cell | |
| JP4362789B2 (en) | battery | |
| JPH0917441A (en) | Square battery having folded electrode plate therein | |
| KR101651712B1 (en) | Secondary Battery | |
| CN210403945U (en) | Laminated lithium ion battery | |
| CN213212234U (en) | A soft pack battery | |
| CN215377442U (en) | Battery core and battery | |
| CN201364930Y (en) | Lithium ion battery and battery pack | |
| CN113394373B (en) | Battery cell and preparation method thereof and battery | |
| CN113394372B (en) | Battery cell and preparation method thereof and battery | |
| CN215377443U (en) | Battery core and battery | |
| CN112038708B (en) | Lithium ion battery roll core structure and manufacturing method thereof | |
| CN114614190A (en) | Electrochemical device and electronic equipment | |
| CN221651571U (en) | High energy density safety cell and battery | |
| CN218548523U (en) | Battery cell and battery | |
| CN216698666U (en) | Battery cell and lithium ion battery | |
| CN215869517U (en) | Battery core and high-voltage lithium battery | |
| CN111293268B (en) | Battery | |
| CN210403946U (en) | Electrode composite unit of odd number layer | |
| CN217387261U (en) | Lithium battery structure | |
| CN113381054A (en) | Folding insertion sheet type battery and manufacturing process thereof | |
| KR20170063132A (en) | Electrode assembly and manufacturing method of electrode assembly | |
| CN215008322U (en) | A kind of multi-connector connecting 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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |