CN108933227B - Battery structure - Google Patents

Battery structure Download PDF

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Publication number
CN108933227B
CN108933227B CN201710367661.1A CN201710367661A CN108933227B CN 108933227 B CN108933227 B CN 108933227B CN 201710367661 A CN201710367661 A CN 201710367661A CN 108933227 B CN108933227 B CN 108933227B
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China
Prior art keywords
layer
current collecting
active material
battery structure
collecting layer
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CN201710367661.1A
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Chinese (zh)
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CN108933227A (en
Inventor
杨思枬
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Prologium Holding Inc
Prologium Technology Co Ltd
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Prologium Holding Inc
Prologium Technology Co Ltd
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Priority to CN201710367661.1A priority Critical patent/CN108933227B/en
Priority to DE212018000211.8U priority patent/DE212018000211U1/en
Priority to JP2020600041U priority patent/JP3226660U6/en
Priority to PCT/CN2018/088074 priority patent/WO2018214919A1/en
Publication of CN108933227A publication Critical patent/CN108933227A/en
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Publication of CN108933227B publication Critical patent/CN108933227B/en
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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
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • 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
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/193—Organic material
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/197—Sealing members characterised by the material having a layered structure
    • 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
    • H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
    • 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
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • 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
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0561—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
    • H01M10/0562—Solid materials
    • 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
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • 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

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

Abstract

The invention provides a battery structure which mainly comprises a first current collecting layer, a second current collecting layer smaller than the first current collecting layer in the orthographic projection direction, and a rubber frame clamped between the first current collecting layer and the second current collecting layer to form an enclosed area, wherein an electrochemical system layer is arranged in the enclosed area, an insulating layer is arranged on the periphery of at least one of the first current collecting layer and the second current collecting layer, the insulating layer is arranged on the periphery of at least one of the first current collecting layer and the second current collecting layer through the first current collecting layer and the second current collecting layer which are designed in unequal length in the orthographic projection direction, and the insulating layer is arranged on the periphery of at least one of the first current collecting layer and the second current collecting layer to avoid external short circuit caused by contact of the first current collecting layer and the second current collecting layer after bending.

Description

Battery structure
Technical Field
The present invention relates to a battery structure, and more particularly, to a battery structure having an external short circuit prevention function.
Background
Under the requirement of human science and technology, various wearable electronic devices are developed accordingly, and in order to make various wearable electronic devices more suitable for the trend of being light and thin, space allocation in the electronic devices becomes an important issue, and a flexible battery that can be disposed on a non-planar surface brings one of the solutions to this issue. Fig. 1 is a sectional view of a flexible solid-state lithium battery. As shown in the figure, the battery structure 40 mainly includes a first current collecting layer 42, a second current collecting layer 44, and a plastic frame 46 sandwiched between the first current collecting layer 42 and the second current collecting layer 44 to form an enclosed region, in which a first active material layer 50, an isolation layer 52, and a second active material layer 54 are sequentially disposed, the first active material layer 50, the isolation layer 52, and the second active material layer 54 form an electrochemical system layer 56, and the first active material layer 50 contacts the first current collecting layer 42, and the second active material layer 54 contacts the second current collecting layer 44. The flexible solid-state lithium battery is characterized in that the whole battery can be bent dynamically, but during the bending process, an external short circuit occurs due to the contact between the first collector layer 42 and the second collector layer 44.
In view of the above problems, the present invention provides a battery structure to overcome the above problems.
Disclosure of Invention
The present invention provides a battery structure, wherein the lengths of the upper current collecting layer and the lower current collecting layer are different, and the periphery of at least one of the first current collecting layer or the second current collecting layer is electrically insulated, so as to prevent the first current collecting layer and the second current collecting layer from generating external short circuit due to contact when the battery is bent.
In order to achieve the above object, the present invention provides a battery structure, which mainly includes a first current collecting layer, a second current collecting layer smaller than the first current collecting layer in the orthogonal projection direction, a rubber frame sandwiched between the first current collecting layer and the second current collecting layer, at least part of the rubber frame is overlapped with the first current collecting layer and the second current collecting layer in the orthographic projection direction, so that the rubber frame, the first current collecting layer and the second current collecting layer jointly form an enclosed area, an electrochemical system layer is arranged in the enclosed area, which comprises a first active material layer, a second active material layer and an isolating layer arranged between the first active material layer and the second active material layer, wherein the first active material layer is contacted with a first collecting layer, the second active material layer is contacted with a second collecting layer, an insulating layer is arranged on the periphery of at least one of the first collector layer and the second collector layer to avoid external short circuit caused by contact between the first collector layer and the second collector layer after bending.
Wherein, the rubber frame covers at least part of the insulating layer.
The glue frame comprises a first glue body layer and a second glue body layer, wherein the first glue body layer is adhered to the first current collecting layer, and the second glue body layer is adhered to the second current collecting layer.
Wherein at least a part of the insulating layer is coated by at least one of the first colloid layer and the second colloid layer.
The rubber frame further comprises a third rubber body layer, and the third rubber body layer is clamped between the first rubber body layer and the second rubber body layer.
Wherein at least a part of the insulation layer is coated by at least one of the first colloid layer, the second colloid layer and the third colloid layer.
Wherein the electrochemical system layer is positioned in the second collector layer in the orthographic projection direction.
Wherein the orthographic projection area of the first active material layer is smaller than that of the first collector layer.
Wherein the orthographic projection area of the second active material layer is smaller than that of the second collector layer.
And D is the difference value of the sizes of the first current collecting layer and the second current collecting layer in the orthographic projection direction, and D is not more than T if the height of the rubber frame is T.
Wherein the periphery includes a side surface and/or a surface extending upward and/or downward from the side surface.
The insulating layer is of a single structure and/or is a part of the rubber frame and/or is of an electrically insulating structure through surface treatment.
The solar cell further comprises a protective layer which is arranged on the outer surface of at least one of the first current collecting layer and the second current collecting layer.
Wherein the protective layer is a separate structure and/or is a portion of the insulating layer.
Wherein it is a flexible battery.
In order to achieve the above object, the present invention provides another battery structure, the battery mainly includes a first current collecting layer, a second current collecting layer smaller than the first current collecting layer in the orthographic projection direction, and a plastic frame sandwiched between the first current collecting layer and the second current collecting layer, wherein at least a portion of the plastic frame overlaps the first current collecting layer and the second current collecting layer in the orthographic projection direction, so that the plastic frame, the first current collecting layer and the second current collecting layer together form an enclosed region, the enclosed region contains an electrochemical system layer including a first active material layer, a second active material layer and an isolation layer disposed between the first active material layer and the second active material layer, the first active material layer contacts the first current collecting layer, the second active material layer contacts the second current collecting layer, an insulating layer is disposed on the periphery of at least one of the first current collecting layer and the second current collecting layer, and at least a portion of the insulating layer is covered by the plastic frame, so as to avoid the first current collecting layer and the second current collecting layer from generating external short circuit after bending.
The glue frame comprises a first glue body layer and a second glue body layer, wherein the first glue body layer is adhered to the first current collecting layer, and the second glue body layer is adhered to the second current collecting layer.
Wherein at least a part of the insulating layer is coated by at least one of the first colloid layer and the second colloid layer.
The rubber frame further comprises a third rubber body layer, and the third rubber body layer is clamped between the first rubber body layer and the second rubber body layer.
Wherein at least a part of the insulation layer is coated by at least one of the first colloid layer, the second colloid layer and the third colloid layer.
Wherein the electrochemical system layer is positioned in the second collector layer in the orthographic projection direction.
Wherein the orthographic projection area of the first active material layer is smaller than that of the first collector layer.
Wherein the orthographic projection area of the second active material layer is smaller than that of the second collector layer.
And D is the difference value of the sizes of the first current collecting layer and the second current collecting layer in the orthographic projection direction, and D is not more than T if the height of the rubber frame is T.
Wherein the periphery includes a side surface and/or a surface extending upward and/or downward from the side surface.
The insulating layer is of a single structure and/or is a part of the rubber frame and/or is of an electrically insulating structure through surface treatment.
The solar cell further comprises a protective layer which is arranged on the outer surface of at least one of the first current collecting layer and the second current collecting layer.
Wherein the protective layer is a separate structure and/or is a portion of the insulating layer.
Wherein it is a flexible battery.
In order to achieve the above object, the present invention provides a battery structure, which mainly includes a first current collecting layer, a second current collecting layer smaller than the first current collecting layer in the orthographic projection direction, and a plastic frame sandwiched between the first current collecting layer and the second current collecting layer, wherein at least a portion of the plastic frame overlaps the first current collecting layer and the second current collecting layer in the orthographic projection direction, so that the plastic frame, the first current collecting layer and the second current collecting layer together form an enclosed region, the enclosed region contains an electrochemical system layer including a first active material layer, a second active material layer and an isolation layer disposed between the first active material layer and the second active material layer, the first active material layer contacts the first current collecting layer, the second active material layer contacts the second current collecting layer, an insulating layer is disposed on the periphery of at least one of the first current collecting layer and the second current collecting layer, and the insulating layer covers at least a portion of the plastic frame, so as to avoid the first current collecting layer and the second current collecting layer from generating external short circuit after bending.
The glue frame comprises a first glue body layer and a second glue body layer, wherein the first glue body layer is adhered to the first current collecting layer, and the second glue body layer is adhered to the second current collecting layer.
The rubber frame further comprises a third rubber body layer, and the third rubber body layer is clamped between the first rubber body layer and the second rubber body layer.
Wherein the electrochemical system layer is positioned in the second collector layer in the orthographic projection direction.
Wherein the orthographic projection area of the first active material layer is smaller than that of the first collector layer.
Wherein the orthographic projection area of the second active material layer is smaller than that of the second collector layer.
And D is the difference value of the sizes of the first current collecting layer and the second current collecting layer in the orthographic projection direction, and D is not more than T if the height of the rubber frame is T.
Wherein the periphery includes a side surface and/or a surface extending upward and/or downward from the side surface.
The insulating layer is of a single structure and/or is a part of the rubber frame and/or is of an electrically insulating structure through surface treatment.
The solar cell further comprises a protective layer which is arranged on the outer surface of at least one of the first current collecting layer and the second current collecting layer.
Wherein the protective layer is a separate structure and/or is a portion of the insulating layer.
Wherein it is a flexible battery.
Drawings
Fig. 1 is a sectional view of a flexible solid-state lithium battery.
Fig. 2A to 2D are schematic structural diagrams of a first embodiment of the invention.
Fig. 3A to 3C are schematic structural views of a second embodiment of the invention.
Fig. 4A to 4O are schematic structural views of a second embodiment of the invention.
FIGS. 5A-1 to 5A-9 are schematic structural views of a second embodiment of the present invention.
FIGS. 5B-1 to 5B-27 are schematic views of the structure of the second embodiment of the present invention.
FIGS. 5C-1 to 5C-27 are schematic views of the structure of the second embodiment of the present invention.
Fig. 6A to 6I are schematic structural views illustrating a third embodiment of the invention.
Description of the reference numerals
10. 40 cell structure
12. 42 first collector layer
14. 44 second collector layer
16. 46 rubber frame
161 first colloidal layer
162 second colloidal layer
163 third colloidal layer
20. 50 first active material layer
22. 52 spacer layer
24. 54 second active material layer
26. 56 electrochemical system layer
28 insulating layer
30 protective layer
Height of T
D size difference values.
Detailed Description
The purpose, technical content, features and effects of the present invention will be more readily understood through the detailed description of the specific embodiments.
The invention provides a solution to the problem that external short circuits are generated due to mutual contact of a first current collecting layer and a second current collecting layer of a flexible solid-state lithium battery after bending.
Please refer to fig. 2A, which is a schematic structural diagram of a first embodiment of the present invention. As shown in the drawings, the battery structure 10 mainly includes a first current collecting layer 12, a second current collecting layer 14 smaller than the first current collecting layer 12 in the orthographic projection direction, and a plastic frame 16 sandwiched between the first current collecting layer 12 and the second current collecting layer 14, wherein the plastic frame 16 at least partially overlaps the first current collecting layer 12 and the second current collecting layer 14 in the orthographic projection direction to form an enclosed region by the first current collecting layer 12, the second current collecting layer 14 and the plastic frame 16, the enclosed region contains an electrochemical system layer 26, the electrochemical system layer 26 includes a first active material layer 20, a second active material layer 24 and an isolation layer 22 disposed between the first active material layer 20 and the second active material layer 24, the first active material layer 20 is in contact with the first current collecting layer 12, the second active material layer 24 is in contact with the second current collecting layer 14, an insulating layer 28 is disposed on the periphery of at least one of the first current collecting layer 12 and the second current collecting layer 14, due to the length difference of the first collector layer 12 and the second collector layer 14 in the orthographic projection direction and the arrangement of the insulating layer, the first collector layer 12 and the second collector layer 14 are prevented from contacting when being bent to generate an external short circuit. As defined herein, a perimeter includes a side surface and/or a surface extending upward and/or downward from the side surface. Wherein the insulating layer 28 is a separate structure and/or is part of the frame 16 and/or is an electrically insulating structure by surface treatment.
In addition, as shown in fig. 2B, the rubber frame 16 of the battery structure includes a first rubber layer 161 and a second rubber layer 162, and the first rubber layer 161 is adhered to the first current collecting layer 12, and the second rubber layer 162 is adhered to the second current collecting layer 14. As shown in fig. 2C, the rubber frame 16 of the battery structure further includes a first rubber layer 161, a second rubber layer 162, and a third rubber layer 163, and the third rubber layer 163 is sandwiched between the first rubber layer 161 and the second rubber layer 162.
Please refer to fig. 3A, fig. 3B, and fig. 3C, which are schematic structural diagrams of a second embodiment of the present invention. As shown in the drawings, the battery structure mainly includes a first current collecting layer 12, a second current collecting layer 14 smaller than the first current collecting layer 12 in the orthographic projection direction, and a plastic frame 16 sandwiched between the first current collecting layer 12 and the second current collecting layer 14, wherein at least a portion of the plastic frame 16 overlaps with the first current collecting layer 12 and the second current collecting layer 14 in the orthographic projection direction, so as to form an enclosed region by the first current collecting layer 12, the second current collecting layer 14 and the plastic frame 16, the enclosed region contains an electrochemical system layer 26, the electrochemical system layer 26 includes a first active material layer 20, a second active material layer 24 and an isolation layer 22 arranged between the first active material layer 20 and the second active material layer 24, the first active material layer 20 is in contact with the first current collecting layer 12, the second active material layer 24 is in contact with the second current collecting layer 14, an insulation layer 28 is arranged on the periphery of at least one of the first current collecting layer 12 and the second current collecting layer 14, and at least part of the insulating layer 28 is covered by the rubber frame 16, so that the first current collecting layer 12 and the second current collecting layer 14 are prevented from contacting to generate an external short circuit when being bent through the length difference of the first current collecting layer 12 and the second current collecting layer 14 in the orthographic projection direction and the arrangement of the insulating layer. As defined herein, a perimeter includes a side surface and/or a surface extending upward and/or downward from the side surface. Wherein the insulating layer 28 is a separate structure and/or is part of the frame 16 and/or is an electrically insulating structure by surface treatment.
In addition, the frame 16 of the battery structure may include a first colloid layer 161 and a second colloid layer 162, the first colloid layer 161 is adhered to the first current collecting layer 12, the second colloid layer 162 is adhered to the second current collecting layer 14, and at least one of the first colloid layer 161 and the second colloid layer 162 covers at least a portion of the insulating layer 28, that is, at least a portion of the insulating layer 28 may be covered by the first colloid layer 161 as shown in fig. 4D, 4E and 4F, or at least a portion of the insulating layer 28 may be covered by the second colloid layer 162 as shown in fig. 4A, 4B and 4C, or at least a portion of the insulating layer 28 may be covered by the first colloid layer 161 and the second colloid layer 162 as shown in fig. 4G to 4O.
Moreover, the rubber frame 16 of the battery structure further includes a first rubber layer 161, a second rubber layer 162 and a third rubber layer 163, the third rubber layer 163 is sandwiched between the first rubber layer 161 and the second rubber layer 162, and at least one of the first rubber layer 161, the second rubber layer 162 and the third rubber layer 163 covers at least a portion of the insulating layer 28. That is, in the case that the insulating layer 28 is covered by only one of the first colloid layer 161, the second colloid layer 162 and the third colloid layer 163, at least a portion of the insulating layer 28 may be covered by the second colloid layer 162 as shown in fig. 5A-1, 5A-2 and 5A-3, or at least a portion of the insulating layer 28 may be covered by the third colloid layer 163 as shown in fig. 5A-4, 5A-5 and 5A-6, or at least a portion of the insulating layer 28 may be covered by the first colloid layer 161 as shown in fig. 5A-7, 5A-8 and 5A-9; in the case where the insulating layer 28 is simultaneously covered by two of the first colloid layer 161, the second colloid layer 162 and the third colloid layer 163, at least a part of the insulating layer 28 may be covered by the second colloid layer 162 and the third colloid layer 163 as shown in fig. 5B-1 to 5B-9, or at least a part of the insulating layer 28 may be covered by the first colloid layer 161 and the third colloid layer 163 as shown in fig. 5B-10 to 5B-18, or at least a part of the insulating layer 28 may be covered by the first colloid layer 161 and the second colloid layer 162 as shown in fig. 5B-19 to 5B-27; in the case where the insulating layer 28 is simultaneously covered by three of the first, second, and third colloid layers 161, 162, and 163, it may be changed according to the covering of the insulating layer 28 by the first, second, and third colloid layers 161, 162, and 163 as shown in fig. 5C-1 to 5C-27.
Please refer to fig. 6A, fig. 6B, and fig. 6C, which are schematic structural diagrams illustrating a third embodiment of the present invention. As shown in the drawings, the battery structure mainly includes a first current collecting layer 12, a second current collecting layer 14 smaller than the first current collecting layer 12 in the orthographic projection direction, and a plastic frame 16 sandwiched between the first current collecting layer 12 and the second current collecting layer 14, wherein at least a portion of the plastic frame 16 overlaps with the first current collecting layer 12 and the second current collecting layer 14 in the orthographic projection direction, so as to form an enclosed region by the first current collecting layer 12, the second current collecting layer 14 and the plastic frame 16, the enclosed region contains an electrochemical system layer 26, the electrochemical system layer 26 includes a first active material layer 20, a second active material layer 24 and an isolation layer 22 arranged between the first active material layer 20 and the second active material layer 24, the first active material layer 20 is in contact with the first current collecting layer 12, the second active material layer 24 is in contact with the second current collecting layer 14, an insulation layer 28 is arranged on the periphery of at least one of the first current collecting layer 12 and the second current collecting layer 14, and the insulating layer 28 covers at least part of the rubber frame 16, so that the first current collecting layer 12 and the second current collecting layer 14 are prevented from contacting to generate an external short circuit when being bent through the length difference of the first current collecting layer 12 and the second current collecting layer 14 in the orthographic projection direction and the arrangement of the insulating layer. As defined herein, a perimeter includes a side surface and/or a surface extending upward and/or downward from the side surface. Wherein the insulating layer 28 is a separate structure and/or is part of the frame 16 and/or is an electrically insulating structure by surface treatment.
In addition, referring to fig. 6D, fig. 6E and fig. 6F, as shown in the figure, the rubber frame 16 of the battery structure may include a first rubber layer 161 and a second rubber layer 162, wherein the first rubber layer 161 is adhered to the first current collecting layer 12, and the second rubber layer 162 is adhered to the second current collecting layer 14. As shown in fig. 6G, fig. 6H and fig. 6I, the rubber frame 16 of the battery structure may further include a first rubber layer 161, a second rubber layer 162 and a third rubber layer 163, wherein the third rubber layer 163 is sandwiched between the first rubber layer 161 and the second rubber layer 162.
In addition, in all the above embodiments, the battery structure 10 may further include a protection layer 30, referring to fig. 2A again, the protection layer 30 is disposed on an outer surface of at least one of the first current collecting layer 12 and the second current collecting layer 14, taking the first current collecting layer 12 as an example, the protection layer 30 is disposed on another surface opposite to the first active material layer 20, wherein the protection layer 30 is a separate structure and/or, as shown in fig. 2D, the protection layer 30 is a portion of the insulating layer 28.
In addition, in the structures of all the above embodiments, the covering condition between the insulating layer and the rubber frame may vary according to the requirements, for example, in the battery structure, there may be a case where the insulating layer of the first embodiment is at the periphery of the first current collecting layer, and at least a part of the insulating layer of the second embodiment is covered by the rubber frame, and of course, there may be a case where three embodiments exist in the same battery structure at the same time. Under the condition that the protective layer exists, the structure of the current collecting layer can be protected, and the situations that the metal surface of the current collecting layer is oxidized or is cracked due to impact and the like are avoided.
According to the battery structure, the upper end face of the rubber frame is adhered to the first current collecting layer, and the lower end face of the rubber frame is adhered to the second current collecting layer, so that the electrochemical system layer completely contained in the enclosed region is completely positioned in the region of the first current collecting layer and/or the second current collecting layer in the orthographic projection direction, namely, the orthographic projection area of the first active material layer is smaller than that of the first current collecting layer, and the orthographic projection area of the second active material layer is smaller than that of the second current collecting layer.
In addition, the plastic frame can be completely or partially located in the orthographic projection area of the first collector layer and the second collector layer, namely, when the rubber frame is completely positioned in the orthographic projection area of the first collector layer and the second collector layer, if the first collector layer and the second collector layer have the same length on the cross section, the rubber frame does not protrude out of the first current collecting layer and the second current collecting layer at all, if the first current collecting layer and the second current collecting layer have different lengths on the cross section, the glue frame is located in the orthographic projection area of the intersection of the first collector layer and the second collector layer, if the glue frame is located locally in the orthographic projection area of the first collector layer and the second collector layer, it means that the local rubber frame is protruded out of the first collector layer and the second collector layer no matter whether the first collector layer and the second collector layer have the same length on the cross section or not.
Referring to fig. 2A, a difference value between sizes of the first current collecting layer and the second current collecting layer in the orthogonal projection direction is D, and a height of the plastic frame is T, and D is not greater than T. The reason why D is not larger than T is that D after bending does not contact another current collecting layer even if the D is bent by 90 degrees in the condition of D = T because D has the thickness of the current collecting layer itself.
Based on the common lithium battery, the active material layer is coated on the current collecting layer and then cut and dried to form the so-called positive electrode or negative electrode, so the size of the active material layer of the positive electrode or negative electrode is the same as that of the current collecting layer, and the positive electrode active material layer must be smaller than the negative electrode active material layer, that is, the positive electrode must be smaller than the negative electrode, based on the consideration of the safety factor, the so-called safety factor is that the lithium dendrite penetrates the isolation layer to cause the short circuit problem of the contact between the internal positive electrode and the negative electrode because the lithium dendrite can generate a large amount of lithium dendrite due to insufficient space of the negative electrode when. In the lithium battery architecture of the present invention, the size of the current collecting layer is not related to the area size of the positive electrode and the negative electrode, in other words, the small current collecting layer of the present invention may also be the current collecting layer of the negative electrode, and the large current collecting layer may also be the current collecting layer of the positive electrode. For reference, referring to fig. 2A, the first current collecting layer 12 in the figure may be a positive current collecting layer or a negative current collecting layer, and the second current collecting layer 14 corresponds to a negative current collecting layer or a positive current collecting layer. That is, when the first current collecting layer 12 is a negative current collecting layer and the second current collecting layer 14 is a positive current collecting layer, this embodiment is distinct from the conventional general lithium battery architecture.
In summary, the first and second current collecting layers with unequal lengths in the orthogonal projection direction and the insulating layer disposed on the periphery of at least one of the first and second current collecting layers are used to prevent the first and second current collecting layers from contacting after the flexible solid-state lithium battery is bent, thereby avoiding the external short circuit problem caused by the contact between the first and second current collecting layers.
However, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, all the equivalent changes or modifications according to the features and the spirit of the claims should be included in the scope of the present invention.

Claims (26)

1. A battery structure, comprising:
a first collector layer;
the second collector layer is smaller than the first collector layer in the orthographic projection direction;
the rubber frame is clamped between the first current collecting layer and the second current collecting layer, at least part of the rubber frame is overlapped with the first current collecting layer and the second current collecting layer in the orthographic projection direction, and the rubber frame, the first current collecting layer and the second current collecting layer form an enclosed area;
an electrochemical system layer disposed in the enclosed region, the electrochemical system layer including a first active material layer, a second active material layer, and an isolation layer disposed between the first active material layer and the second active material layer, the first active material being in contact with the first current collection layer, the second active material layer being in contact with the second current collection layer; and
and the insulating layer is arranged on the periphery of at least one of the first collector layer and the second collector layer, and at least part of the insulating layer is coated by the rubber frame.
2. The battery structure of claim 1, wherein the adhesive frame comprises a first adhesive layer and a second adhesive layer, the first adhesive layer is adhered to the first current collecting layer, and the second adhesive layer is adhered to the second current collecting layer.
3. The battery structure of claim 2, wherein at least a portion of the insulating layer is covered by at least one of the first gel layer and the second gel layer.
4. The battery structure of claim 2, wherein the adhesive frame further comprises a third adhesive layer sandwiched between the first adhesive layer and the second adhesive layer.
5. The battery structure of claim 4, wherein at least a portion of the insulating layer is covered by at least one of the first gel layer, the second gel layer, and the third gel layer.
6. The cell structure of claim 1, wherein the electrochemical system layer is located within the second current collector layer in an orthogonal projection direction.
7. The battery structure of claim 6, wherein an orthographic area of the first active material layer is less than an orthographic area of the first current collector layer.
8. The battery structure of claim 6, wherein an orthographic area of the second active material layer is less than an orthographic area of the second collector layer.
9. The battery structure of claim 1, wherein the difference between the dimensions of the first current collecting layer and the second current collecting layer in the orthographic projection direction is D, and the height of the rubber frame is T, then D is not greater than T.
10. The battery structure of claim 1, wherein the peripheral edge comprises a side surface and/or a surface extending upward and/or downward from the side surface.
11. The battery structure of claim 1, wherein the insulating layer is a separate structure or is part of the adhesive frame.
12. The battery structure according to claim 1, wherein the insulating layer is a structure that is electrically insulated by surface treatment.
13. The battery structure of claim 1, further comprising a protective layer disposed on an outer surface of at least one of the first current collector layer and the second current collector layer.
14. The battery structure of claim 13, wherein the protective layer is a separate structure or is part of the insulating layer.
15. The battery structure of claim 1, wherein the battery structure is a flexible battery.
16. A battery structure, comprising:
a first collector layer;
the second collector layer is smaller than the first collector layer in the orthographic projection direction;
the rubber frame is clamped between the first current collecting layer and the second current collecting layer, at least part of the rubber frame is overlapped with the first current collecting layer and the second current collecting layer in the orthographic projection direction, and the rubber frame, the first current collecting layer and the second current collecting layer form an enclosed area;
an electrochemical system layer disposed in the enclosed region, the electrochemical system layer including a first active material layer, a second active material layer, and an isolation layer disposed between the first active material layer and the second active material layer, the first active material being in contact with the first current collection layer, the second active material layer being in contact with the second current collection layer;
an insulating layer arranged on the periphery of at least one of the first collector layer and the second collector layer and wrapping at least part of the rubber frame; and
a protective layer arranged on the outer surface of at least one of the first current collecting layer and the second current collecting layer; the protective layer is a separate structure or is part of the insulating layer.
17. The battery structure of claim 16, wherein the adhesive frame comprises a first adhesive layer and a second adhesive layer, the first adhesive layer is adhered to the first current collecting layer, and the second adhesive layer is adhered to the second current collecting layer.
18. The battery structure of claim 17, wherein the adhesive frame further comprises a third adhesive layer sandwiched between the first adhesive layer and the second adhesive layer.
19. The cell structure of claim 16, wherein the electrochemical system layer is located within the second current collector layer in an orthogonal projection direction.
20. The battery structure of claim 19, wherein an orthographic area of the first active material layer is less than an orthographic area of the first current collector layer.
21. The battery structure of claim 19, wherein the second active material layer has an orthographic area less than the orthographic area of the second collector layer.
22. The battery structure of claim 16, wherein the difference between the dimensions of the first current collecting layer and the second current collecting layer in the orthographic projection direction is D, and the height of the rubber frame is T, then D is not greater than T.
23. The battery structure of claim 16, wherein the peripheral edge comprises a side surface and/or a surface extending upward and/or downward from the side surface.
24. The battery structure of claim 16, wherein the insulating layer is a separate structure or is part of the adhesive frame.
25. The battery structure of claim 16, wherein the insulating layer is a structure that is electrically insulated by surface treatment.
26. The battery structure of claim 16, characterized in that it is a flexible battery.
CN201710367661.1A 2017-05-23 2017-05-23 Battery structure Active CN108933227B (en)

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