CN113924679B - Battery cell structure and battery - Google Patents
Battery cell structure and battery Download PDFInfo
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- CN113924679B CN113924679B CN202080034508.7A CN202080034508A CN113924679B CN 113924679 B CN113924679 B CN 113924679B CN 202080034508 A CN202080034508 A CN 202080034508A CN 113924679 B CN113924679 B CN 113924679B
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- 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
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- 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
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- 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
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- Chemical & Material Sciences (AREA)
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- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
A battery cell structure (100) and a battery (300) thereof, wherein the battery cell structure (100) comprises a first electrode assembly (110) and a second electrode assembly (120), and a first side surface (111) of the first electrode assembly (110) is opposite to a first side surface (121) of the second electrode assembly (120). The battery cell structure (100) further comprises a first tab (130) and a second tab (140), the first tab (130) and the second tab (140) are electrically connected to the first electrode assembly (110), the first tab (130) and the second tab (140) penetrate through the first side face (111) and the second side face (112) of the first electrode assembly (110), the first tab (130) is electrically connected to the second electrode assembly (120), and an insulating material (150) is arranged between the first side face (111) of the first electrode assembly (110) and the first side face (121) of the second electrode assembly (120). The special-shaped battery cell is formed by the two electrode assemblies (110, 120) in the battery cell structure (100), the battery cell production efficiency is high, the pole piece material utilization rate is high, and short circuit between the two electrode assemblies (110, 120) can be avoided.
Description
Technical Field
The present disclosure relates to electrochemical devices, and particularly to a battery cell structure and a battery.
Background
With the rapid development of electronic products, the power consumption and the product endurance requirements of the electronic products are higher and higher. The electronic product may appear after completing the layout of the electronic components in the design process, and the accommodating space reserved for the battery is not cuboid, but is in an irregular shape such as an L shape, a T shape and the like, which requires battery manufacturers to develop special-shaped batteries matched with the accommodating space so as to improve the space utilization rate of the electronic equipment.
Lamination processes are currently commonly employed in the industry to manufacture shaped cells. But lamination process production efficiency is low, and material utilization rate is low, resulting in high production cost. And the special-shaped pole piece in the current lamination process cannot be directly coated, only a rectangular pole piece can be coated first, then the required special-shaped pole piece shape is cut, the cut pole piece material can only be scrapped, and the material utilization rate is low.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, one aspect of the present application is to provide a cell structure, wherein the cell structure forms a special-shaped cell through two electrode assemblies, the cell has high production efficiency and high pole piece material utilization rate, and short circuit between the two electrode assemblies can be avoided.
The battery cell structure comprises a first electrode assembly and a second electrode assembly, wherein the first side face of the first electrode assembly is opposite to the first side face of the second electrode assembly. The battery cell structure further comprises a first tab and a second tab, the first tab and the second tab are electrically connected to the first electrode assembly, the first tab and the second tab penetrate through the first side face and the second side face of the first electrode assembly, the first tab is electrically connected to the second electrode assembly, and an insulating material is arranged between the first side face of the first electrode assembly and the first side face of the second electrode assembly.
In some embodiments, the second electrode tab is further electrically connected to the second electrode assembly.
In some embodiments, the first electrode assembly is formed from a first pole piece, a first separator, a second pole piece, and a second separator sheet, or film wound, and the second electrode assembly is formed from a third pole piece, a third separator, a fourth pole piece, and a fourth separator sheet, or film wound.
In some embodiments, the first electrode assembly and the second electrode assembly share a housing, and when the principal plane of the first electrode assembly is the line of sight plane, the first electrode assembly and the second electrode assembly form an L-shaped electrode assembly shape or a T-shaped electrode assembly shape.
In some embodiments, the insulating material is disposed on the first side of the first electrode assembly or on the first side of the second electrode assembly.
In some embodiments, the insulating material is disposed on the first side of the first electrode assembly when the first electrode assembly and the second electrode assembly are arranged in a parallel winding direction.
In some embodiments, the insulating material is a single-sided adhesive insulating layer.
In some embodiments, the insulating material is a multi-segment insulating layer, the multi-segment insulating layer is adhered to the first side surface of the first electrode assembly, and the multi-segment insulating layer is arranged at intervals by taking the first tab and the second tab as interval points.
In some embodiments, the first side of the second electrode assembly is a semicircular curved surface, the insulating material is a single-sided adhesive insulating layer and is disposed on the first side of the second electrode assembly, the length of the insulating layer is greater than or equal to the length of the first side of the first electrode assembly, and the width of the insulating layer is greater than or equal to the arc length of the semicircular curved surface.
In some embodiments, the thickness of the insulating layer is 0.01mm to 0.2mm.
In some embodiments, the insulating material is a glue line formed by glue dripping on the first side surface of the first electrode assembly and solidifying.
In some embodiments, the glue line is continuous without a break point and avoids the first tab and the second tab.
In some embodiments, the glue line includes at least one break point.
In some embodiments, the first electrode assembly is formed by winding a first pole piece, a first separator, a second pole piece, and a second separator, the second electrode assembly is formed by winding a third pole piece, a third separator, a fourth pole piece, and a fourth separator, the fourth separator comprises a winding section wound along a winding direction of the second electrode assembly and a tail-collecting section forming a tail-collecting of the fourth separator, the tail-collecting section of the fourth separator is located on a first side of the second electrode assembly, and the insulating material is the tail-collecting section of the fourth separator disposed on the first side of the second electrode assembly.
In some embodiments, the second electrode assembly includes a plurality of winding layers, each of which is a fourth separator, a fourth pole piece, a third separator, and a third pole piece in order from the inside to the outside.
In some embodiments, the insulating material is an insulating spacer.
According to the battery cell structure provided by the embodiment of the application, the electrode lugs penetrating through the electrode assemblies are used for connecting the first electrode assemblies and the second electrode assemblies to form the special-shaped battery cell, so that the production efficiency of the battery cell can be improved, the pole piece material utilization rate is high, and meanwhile, the short circuit between the first electrode assemblies and the second electrode assemblies can be avoided by arranging the insulating material between the first side surfaces of the first electrode assemblies and the first side surfaces of the second electrode assemblies.
Another aspect of the present application is to provide a battery including a cell structure. The cell structure comprises a first electrode assembly and a second electrode assembly, wherein the first side surface of the first electrode assembly is opposite to the first side surface of the second electrode assembly. The battery cell structure further comprises a first tab and a second tab, the first tab and the second tab are electrically connected to the first electrode assembly, the first tab and the second tab penetrate through the first side face and the second side face of the first electrode assembly, the first tab is electrically connected to the second electrode assembly, and an insulating material is arranged between the first side face of the first electrode assembly and the first side face of the second electrode assembly.
According to the battery provided by the embodiment of the application, the first electrode assembly and the second electrode assembly are connected by the lug penetrating through the electrode assemblies to form the special-shaped battery cell, so that the production efficiency of the battery cell can be improved, the pole piece material utilization rate is high, and meanwhile, the short circuit between the first electrode assembly and the second electrode assembly can be avoided by arranging the insulating material between the first side surface of the first electrode assembly and the first side surface of the second electrode assembly.
Drawings
Fig. 1 shows a schematic structure of a cell structure according to an embodiment of the present application;
fig. 2 illustrates a schematic structural view of a first electrode assembly according to an embodiment of the present application;
fig. 3 illustrates a schematic structural view of a second electrode assembly according to an embodiment of the present application;
FIGS. 4A-4B are schematic views showing winding directions of a first electrode assembly and a second electrode assembly according to an embodiment of the present application;
FIG. 5 shows a schematic view of an arrangement of insulating material according to an embodiment of the application;
FIG. 6 is a cross-sectional view taken along line A1-A1' of FIG. 5;
FIG. 7 is a schematic view showing an arrangement of an insulating material according to another embodiment of the present application;
FIG. 8 is a schematic illustration of a glue line of FIG. 7 dispensed on a first side of a first electrode assembly;
fig. 9 is a schematic view showing an arrangement of an insulating material according to still another embodiment of the present application;
FIG. 10 is a cross-sectional view taken along line B1-B1' of FIG. 9;
fig. 11 is a schematic structural view of a cell structure according to another embodiment of the present application;
fig. 12 shows a schematic view of a cell structure to be assembled to a housing according to an embodiment of the application;
fig. 13 shows a schematic block diagram of a battery according to an embodiment of the present application.
Description of the main reference signs
First pole piece 11
First separator 12
Second pole piece 13
Second isolation film 14
Third pole piece 21
Third separation film 22
Fourth pole piece 23
Fourth separation film 24
Cell structure 100
First electrode assembly 110
First side 111, 121
Second side surface 112
Second electrode assembly 120
First tab 130
Second lug 140
Insulating material 150
Outer casing 200
Battery 300
The application will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.
A cell structure 100 according to an embodiment of the present application is described in detail below with reference to fig. 1-12.
As shown in fig. 1 to 3, a battery cell structure 100 according to an embodiment of the present application includes a first electrode assembly 110, a second electrode assembly 120, a first tab 130, and a second tab 140. The first electrode assembly 110 is formed by winding a first electrode sheet 11, a first separator 12, a second electrode sheet 13, and a second separator 14, and the second electrode assembly 120 is formed by winding a third electrode sheet 21, a third separator 22, a fourth electrode sheet 23, and a fourth separator 24. The first tab 130 and the second tab 140 are electrically connected to the first electrode assembly 110, and the first tab 130 and the second tab 140 penetrate through the first side 111 and the second side 112 of the first electrode assembly 110. The first tab 130 is also electrically connected to the second electrode assembly 120. The first side 111 of the first electrode assembly 110 is disposed opposite to the first side 121 of the second electrode assembly 120. An insulating material 150 is disposed between the first side 111 of the first electrode assembly 110 and the first side 121 of the second electrode assembly 120.
In some embodiments, the second electrode tab 140 is also electrically connected to the second electrode assembly 120.
In some embodiments, the first tab 130 and the second tab 140 penetrating from the first side 111 of the first electrode assembly 110 are electrically connected to the second electrode assembly 120, and the first tab 130 and the second tab 140 penetrating from the second side 112 of the first electrode assembly 110 are electrically connected to external positive and negative electrode sheets.
In some embodiments, the first tab 130 is electrically connected to the empty foil region of the first pole piece 11 and the empty foil region of the third pole piece 21, and the second tab 140 is electrically connected to the empty foil region of the second pole piece 13 and the empty foil region of the fourth pole piece 23. In other embodiments, the first pole piece 11, the second pole piece 13, the third pole piece 21 and the fourth pole piece 23 may include connection areas exposed by the cleaning process, the first tab 130 may be electrically connected to the connection areas of the first pole piece 11, or the connection areas of the third pole piece 21, and the second tab 140 may be further electrically connected to the connection areas of the second pole piece 13, or the connection areas of the fourth pole piece 23.
In some embodiments, the first tab 130 is a positive tab, the second tab 140 is a negative tab, or the first tab 130 is a negative tab, and the second tab 140 is a positive tab. When the first tab 130 is a positive tab and the second tab 140 is a negative tab, the first and third electrode sheets 11 and 21 may include aluminum foil, and the second and fourth electrode sheets 13 and 23 may include copper foil. When the first tab 130 is a negative tab and the second tab 140 is a positive tab, the first pole piece 11 and the third pole piece 21 may include copper foil, and the second pole piece 13 and the fourth pole piece 23 may include aluminum foil.
As shown in fig. 2, the first electrode assembly 110 includes a plurality of winding layers, and each winding layer of the first electrode assembly 110 is sequentially provided with a second separator 14, a second electrode sheet 13, a first separator 12, and a first electrode sheet 11 from inside to outside. As shown in fig. 3, the second electrode assembly 120 includes a plurality of winding layers, and each winding layer of the second electrode assembly 120 is a fourth separator 24, a fourth electrode sheet 23, a third separator 22, and a third electrode sheet 21 in order from the inside to the outside.
In some embodiments, the first electrode assembly 110 may be further formed of a lamination of the first electrode sheet 11, the first separator 12, the second electrode sheet 13, and the second separator 14, and the second electrode assembly 120 may be further formed of a lamination of the third electrode sheet 21, the third separator 22, the fourth electrode sheet 23, and the fourth separator 24.
In some embodiments, the insulating material includes, but is not limited to, an insulating layer, glue lines formed by glue drops, insulating spacers, and the like.
According to the battery cell structure 100 provided by the embodiment of the application, the first electrode assembly 110 and the second electrode assembly 120 form the special-shaped battery cell, the battery cell production efficiency is high, the pole piece material utilization rate is high, and the insulating material 150 is arranged between the first side 111 of the first electrode assembly 110 and the first side 121 of the second electrode assembly 120, so that the short circuit between the two electrode assemblies is avoided.
As shown in fig. 4A, the major plane of the first electrode assembly 110 is in the same plane as the major plane of the second electrode assembly 120, and the first electrode assembly 110 and the second electrode assembly 120 are arranged in a perpendicular winding direction. The thickness direction of the first electrode assembly 110 is parallel to the thickness direction of the second electrode assembly 120, the winding direction of the first electrode assembly 110 is parallel to the thickness direction of the first electrode assembly 110, the winding direction of the second electrode assembly 120 is perpendicular to the thickness direction of the second electrode assembly 120, and at this time, the insulating material 150 may be disposed on the first side 111 of the first electrode assembly 110 or on the first side 121 of the second electrode assembly 120.
As shown in fig. 4B, the main plane of the first electrode assembly 110 is in the same plane as the main plane of the second electrode assembly 120, and the first electrode assembly 110 and the second electrode assembly 120 are arranged in a parallel winding direction. The thickness direction of the first electrode assembly 110 is parallel to the thickness direction of the second electrode assembly 120, the winding direction of the first electrode assembly 110 is parallel to the thickness direction of the first electrode assembly 110, the winding direction of the second electrode assembly 120 is parallel to the thickness direction of the second electrode assembly 120, and the insulating material 150 may be disposed on the first side 111 of the first electrode assembly 110.
As shown in fig. 5, the insulating material 150 is an insulating layer, and the surface of the insulating layer has an adhesive property, and may be further adhered to the first side 111 of the first electrode assembly 110, so as to isolate the first electrode assembly 110 from the second electrode assembly 120. The insulating layer is preferably adhesive on one side, and the insulating layer may be made of Polyethylene (PE) and may have a thickness of 0.01-0.2 mm. The width and number of the insulating layers may be determined according to the attaching process of the insulating layers and the isolation requirement of the electrode assembly, and the insulating layers preferably avoid the first tab 130 and the second tab 140. The insulating material 150 shown in fig. 5 is a 3-segment insulating layer, and the 3-segment insulating layers are adhered to the first side 111,3 of the first electrode assembly 110, and are arranged at intervals with the first tab 130 and the second tab 140 as the interval points. In other embodiments, the insulating material 150 may include more than 3 segments of insulating layers, or less than 3 segments of insulating layers.
It will be appreciated that the material of the insulating layer may be made of other nonconductive materials, and the thickness of the insulating layer may be greater than 0.2mm, which is not limited herein.
In some embodiments, the insulating layer is attached to both sides adjacent to the first side 111 of the first electrode assembly 110, in addition to the first side 111 of the first electrode assembly 110, as shown in fig. 6.
As shown in fig. 7, the insulating material 150 is a glue line formed by glue dripping on the first side 111 of the first electrode assembly 110, and the glue line preferably has a certain flexibility after solidification, so as to avoid brittle fracture and falling off of the glue line. As shown in fig. 8, the glue line dropped on the first side 111 of the first electrode assembly 110 is continuously without break points and avoids the first tab 130 and the second tab 140.
In some embodiments, the glue line that is dropped on the first side 111 of the first electrode assembly 110 may also include at least one break point and avoid the first tab 130 and the second tab 140.
As shown in fig. 9, the insulating material 150 is an insulating layer, and the surface of the insulating layer has an adhesive property, and may be further adhered to the first side 121 of the second electrode assembly 120, so as to isolate the first electrode assembly 110 from the second electrode assembly 120. Since only a partial region of the first side 121 of the second electrode assembly 120 is opposite to the first side 111 of the first electrode assembly 110, the insulating material 150 may cover only a region of the first side 121 of the second electrode assembly 120 opposite to the first side 111 of the first electrode assembly 110, where the length of the insulating layer is equal to the length of the first side 111 of the first electrode assembly 110.
In some embodiments, the length of the insulating layer may also be greater than the length of the first side 111 of the first electrode assembly 110 to ensure complete isolation from the first side 111 of the first electrode assembly 110.
As shown in fig. 10, the first side 121 of the second electrode assembly 120 is a semicircular angular surface, and the width of the insulating layer is greater than the arc length of the semicircular angular surface to completely cover the first side 121 of the second electrode assembly 120. In other embodiments, the width of the insulating layer may also be equal to the arc length of the semicircular corner curved surface.
In some embodiments, the insulating material 150 is an insulating spacer disposed between the first side 111 of the first electrode assembly 110 and the first side 121 of the second electrode assembly 120, and the insulating spacer may be provided with two through holes such that the first tab 130 and the second tab 140 pass through the insulating spacer.
In some embodiments, when the first electrode assembly 110 is formed by winding the first electrode sheet 11, the first separator 12, the second electrode sheet 13, and the second separator 14, and the second electrode assembly 120 is formed by winding the third electrode sheet 21, the third separator 22, the fourth electrode sheet 23, and the fourth separator 24, the insulating material 150 may be the fourth separator 24 extending to the first side 121 of the second electrode assembly 120. The fourth separator 24 includes a winding section wound in the winding direction of the second electrode assembly 120 and a terminating section forming a fourth separator termination, the terminating section of the fourth separator 24 being located at the first side 121 of the second electrode assembly 120. For example, the ending section of the fourth separation membrane 24 covers the first side 121 of the second electrode assembly 120.
As shown in fig. 11, the major plane of the first electrode assembly 110 and the major plane of the second electrode assembly 120 are in the same plane, and the first electrode assembly 110 and the second electrode assembly 120 may form a T-shaped electrode assembly shape. The first electrode assembly 110 and the second electrode assembly 120 may also form an L-shaped electrode assembly shape (as shown in fig. 1). In other embodiments, when the principal plane of the first electrode assembly 110 and the principal plane of the second electrode assembly 120 are not in the same plane, the first electrode assembly 110 and the second electrode assembly 120 may also form a T-shaped electrode assembly shape or an L-shaped electrode assembly shape when the principal plane of the first electrode assembly 110 is the line of sight plane.
As shown in fig. 12, the principal plane of the first electrode assembly 110 and the principal plane of the second electrode assembly 120 are in the same plane, the first electrode assembly 110 and the second electrode assembly 120 share a housing 200 for assembly, and the housing 200 can design the depth of the deep and shallow pits according to the actual thickness of the first electrode assembly 110 and the second electrode assembly 120 so as to meet the requirement of the relative positions of the first electrode assembly 110 and the second electrode assembly 120 on the plane. The thicknesses of the first electrode assembly 110 and the second electrode assembly 120 may be the same or different. In other embodiments, if the major plane of the first electrode assembly 110 and the major plane of the second electrode assembly 120 are not in the same plane, the shape of the case 200 may be adjusted according to the actual assembly shape of the first electrode assembly 110 and the second electrode assembly 120.
In addition, as shown in fig. 13, the application also discloses a battery 300, and the battery 300 comprises the cell structure 100 in any of the above cases.
The cell structure 100 according to embodiments of the present application is described in detail below with reference to some specific embodiments. It is to be understood that the following description is exemplary only and is not intended to limit the application.
Example 1:
in this embodiment, the cell structure 100 includes a first electrode assembly 110, a second electrode assembly 120, a first tab 130, and a second tab 140. The first electrode assembly 110 is formed by winding a first electrode sheet 11, a first separator 12, a second electrode sheet 13, and a second separator 14, and the second electrode assembly 120 is formed by winding a third electrode sheet 21, a third separator 22, a fourth electrode sheet 23, and a fourth separator 24. The first side 111 of the first electrode assembly 110 is disposed opposite to the first side 121 of the second electrode assembly 120. The main plane of the first electrode assembly 110 and the main plane of the second electrode assembly 120 are in the same plane, the first electrode assembly 110 and the second electrode assembly 120 form an L-shaped electrode assembly shape, and the first electrode assembly 110 and the second electrode assembly 120 are disposed in the case 200 in a perpendicular winding direction. The first tab 130 is electrically connected to the hollow foil area of the first pole piece 11, the second tab 140 is electrically connected to the hollow foil area of the second pole piece 13, the first tab 130 and the second tab 140 penetrate through the first side 111 and the second side 112 of the first electrode assembly 110, the first tab 130 is further electrically connected to the hollow foil area of the third pole piece 21, and the second tab 140 is further electrically connected to the hollow foil area of the fourth pole piece 23. An insulating material 150 is disposed between the first side 111 of the first electrode assembly 110 and the first side 121 of the second electrode assembly 120, and the insulating material 150 is a multi-stage insulating layer attached to the first side 111 of the first electrode assembly 110. The battery cell structure 100 connects external positive and negative electrode sheets through the first tab 130 and the second tab 140 penetrating from the second side 112 of the first electrode assembly 110.
Example 2:
in this embodiment, the cell structure 100 includes a first electrode assembly 110, a second electrode assembly 120, a first tab 130, and a second tab 140. The first electrode assembly 110 is formed by winding a first electrode sheet 11, a first separator 12, a second electrode sheet 13, and a second separator 14, and the second electrode assembly 120 is formed by winding a third electrode sheet 21, a third separator 22, a fourth electrode sheet 23, and a fourth separator 24. The first side 111 of the first electrode assembly 110 is disposed opposite to the first side 121 of the second electrode assembly 120. The main plane of the first electrode assembly 110 and the main plane of the second electrode assembly 120 are in the same plane, the first electrode assembly 110 and the second electrode assembly 120 form an L-shaped electrode assembly shape, and the first electrode assembly 110 and the second electrode assembly 120 are disposed in the case 200 in a perpendicular winding direction. The first tab 130 is electrically connected to the hollow foil area of the first pole piece 11, the second tab 140 is electrically connected to the hollow foil area of the second pole piece 13, the first tab 130 and the second tab 140 penetrate through the first side 111 and the second side 112 of the first electrode assembly 110, the first tab 130 is further electrically connected to the hollow foil area of the third pole piece 21, and the second tab 140 is further electrically connected to the hollow foil area of the fourth pole piece 23. An insulating material 150 is disposed between the first side 111 of the first electrode assembly 110 and the first side 121 of the second electrode assembly 120, and the insulating material 150 is an insulating layer that is adhered to the first side 121 of the second electrode assembly 120 and completely covers the first side 121. The battery cell structure 100 connects external positive and negative electrode sheets through the first tab 130 and the second tab 140 penetrating from the second side 112 of the first electrode assembly 110.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application. In the description of the present application, "plurality" means two or more.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. The utility model provides a battery cell structure, includes first electrode assembly and second electrode assembly, first side of first electrode assembly with the first side of second electrode assembly sets up, its characterized in that:
the battery cell structure further comprises a first electrode lug and a second electrode lug, wherein the first electrode lug and the second electrode lug are electrically connected to the first electrode assembly, the first electrode lug and the second electrode lug penetrate through a first side face and a second side face of the first electrode assembly, the first electrode lug is further electrically connected to the second electrode assembly, an insulating material is arranged between the first side face of the first electrode assembly and the first side face of the second electrode assembly, and the insulating material is in contact with the first side face of the first electrode assembly and the first side face of the second electrode assembly;
the first electrode assembly is formed by winding a first pole piece, a first diaphragm, a second pole piece and a second diaphragm, the second electrode assembly is formed by winding a third pole piece, a third diaphragm, a fourth pole piece and a fourth diaphragm, the fourth diaphragm comprises a winding section which winds along the winding direction of the second electrode assembly and a tail-collecting section which forms the tail of the fourth diaphragm, the tail-collecting section of the fourth diaphragm is positioned on the first side face of the second electrode assembly, and the insulating material is arranged on the tail-collecting section of the fourth diaphragm on the first side face of the second electrode assembly.
2. The cell structure of claim 1, wherein the second tab is further electrically connected to the second electrode assembly.
3. The cell structure of claim 1, wherein the first electrode assembly and the second electrode assembly share a housing, and wherein the first electrode assembly and the second electrode assembly form an L-shaped electrode assembly shape or a T-shaped electrode assembly shape when the major plane of the first electrode assembly is the line of sight plane.
4. The cell structure of claim 1, wherein the insulating material is disposed on the first side of the first electrode assembly or on the first side of the second electrode assembly.
5. The cell structure of claim 4, wherein the insulating material is disposed on the first side of the first electrode assembly when the first electrode assembly and the second electrode assembly are arranged in a parallel winding direction.
6. The cell structure of claim 1, wherein the insulating material has a thickness of 0.01mm to 0.2mm.
7. The cell structure of claim 1, wherein the second electrode assembly comprises a plurality of winding layers, each of the winding layers comprising, in order from the inside to the outside, a fourth separator, a fourth pole piece, a third separator, and a third pole piece.
8. A battery comprising the cell structure of any one of claims 1-7.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/082309 WO2021195925A1 (en) | 2020-03-31 | 2020-03-31 | Battery cell structure and battery |
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| Publication Number | Publication Date |
|---|---|
| CN113924679A CN113924679A (en) | 2022-01-11 |
| CN113924679B true CN113924679B (en) | 2023-08-22 |
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| CN202080034508.7A Active CN113924679B (en) | 2020-03-31 | 2020-03-31 | Battery cell structure and battery |
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| WO (1) | WO2021195925A1 (en) |
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| CN116565340B (en) * | 2023-07-10 | 2024-03-12 | 宁德新能源科技有限公司 | Battery cell and electric equipment |
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| CN205564897U (en) * | 2016-01-20 | 2016-09-07 | 松下能源(无锡)有限公司 | Nonaqueous electrolyte battery |
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| KR101620173B1 (en) * | 2013-07-10 | 2016-05-13 | 주식회사 엘지화학 | A stepwise electrode assembly with good stability and the method thereof |
| KR102303827B1 (en) * | 2014-10-06 | 2021-09-17 | 삼성전자주식회사 | Complex electrode assembly including a plurality of electrode assemblies and electrochemical device comprising the complex electrode assembly |
| KR20160146304A (en) * | 2015-06-12 | 2016-12-21 | 삼성에스디아이 주식회사 | Secondary Battery |
| CN110165133A (en) * | 2019-05-28 | 2019-08-23 | 华为技术有限公司 | A kind of battery and battery pack |
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| CN103227340A (en) * | 2012-01-31 | 2013-07-31 | 三星Sdi株式会社 | Secondary battery |
| CN203026608U (en) * | 2013-01-16 | 2013-06-26 | 刘志航 | Lithium ion battery capable of being bent to use |
| CN203690420U (en) * | 2014-01-23 | 2014-07-02 | 东莞新能源科技有限公司 | Lithium ion battery |
| CN107925118A (en) * | 2015-11-30 | 2018-04-17 | 株式会社Lg化学 | The battery unit of irregular structure with the unit housings for improving sealing reliability |
| CN205564897U (en) * | 2016-01-20 | 2016-09-07 | 松下能源(无锡)有限公司 | Nonaqueous electrolyte battery |
| CN105609866A (en) * | 2016-03-09 | 2016-05-25 | 湖南立方新能源科技有限责任公司 | Preparation method of flexible battery |
| CN206225478U (en) * | 2016-10-27 | 2017-06-06 | 宁德时代新能源科技股份有限公司 | A kind of lithium-ion power battery structure |
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| WO2021195925A1 (en) | 2021-10-07 |
| CN113924679A (en) | 2022-01-11 |
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