CN107946650B - Battery structure - Google Patents

Battery structure Download PDF

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Publication number
CN107946650B
CN107946650B CN201610893355.7A CN201610893355A CN107946650B CN 107946650 B CN107946650 B CN 107946650B CN 201610893355 A CN201610893355 A CN 201610893355A CN 107946650 B CN107946650 B CN 107946650B
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China
Prior art keywords
layer
current collecting
active material
material layer
collecting layer
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CN201610893355.7A
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Chinese (zh)
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CN107946650A (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 CN201610893355.7A priority Critical patent/CN107946650B/en
Publication of CN107946650A publication Critical patent/CN107946650A/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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • 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 capable of avoiding external short circuit, which mainly comprises a first current collecting layer, a second current collecting layer 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, the electrochemical system layer 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, the first active material layer is in contact with the first current collecting layer, the second active material layer is in contact with the second current collecting layer, at least one periphery of the first current collecting layer and at least one periphery of the second current collecting layer are electrically insulated, and the first current collecting layer and the second current collecting layer are prevented from being in external short circuit due to contact after being bent.

Description

Battery structure
Technical Field
The present invention relates to a battery structure, and more particularly, to a battery structure capable of preventing external short circuit.
Background
In order to meet the requirements of human science and technology, various wearable electronic devices are correspondingly developed, and in order to make various wearable electronic devices more suitable for the trend of light and thin, space distribution 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 flexible solid-state lithium battery 10 mainly includes a first current collecting layer 12, a second current collecting layer 14, and a plastic frame 16 sandwiched between the first current collecting layer 12 and the second current collecting layer 14 to form an enclosed region 18, wherein the enclosed region 18 is provided with a first active material layer 20, an isolation layer 22, and a second active material layer 24, the first active material layer 20, the isolation layer 22, and the second active material layer 24 in sequence, so as to form an electrochemical system layer 26, and the first active material layer 20 is in contact with the first current collecting layer 12, and the second active material layer 24 is in contact with the second current collecting layer 14. The flexible solid-state lithium battery 10 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 12 and the second collector layer 14.
In view of the above problems, the present invention provides a battery structure capable of avoiding external short circuit to overcome the above drawbacks of the prior art.
Disclosure of Invention
The present invention provides a battery structure capable of avoiding external short circuit, in which at least one of the peripheries of a first current collecting layer or a second current collecting layer is electrically insulated to avoid the external short circuit caused by the contact between the first current collecting layer and the second current collecting layer when the battery is bent.
The present invention provides a battery structure capable of avoiding external short circuit, which mainly includes a first current collecting layer, a second current collecting layer, and a plastic frame sandwiched between the first current collecting layer and the second current collecting layer to form an enclosed region, wherein the enclosed region contains an electrochemical system layer, which includes 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 is in contact with the first current collecting layer, the second active material layer is in contact with the second current collecting layer, at least one of the peripheries of the first current collecting layer and the second current collecting layer is electrically insulated to avoid external short circuit caused by contact between the upper current collecting layer and the lower current collecting layer after bending.
The electrochemical system layer is positioned in the first collector layer and 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.
Wherein the periphery includes a side surface and/or a surface extending upward and/or downward from the side surface.
Wherein the periphery of at least one of the first collector layer or the second collector layer is provided with an insulating layer.
Wherein, the insulating layer is also a part of the rubber frame.
Wherein the insulating layer is an electrically insulating structure by surface treatment.
At least part of the rubber frame is positioned in the orthographic projection area of the first collector layer and the second collector layer.
And the local rubber frame is also positioned outside the orthographic projection area of the first current collecting layer and the second current collecting layer.
Wherein the battery is a flexible battery or a soft package battery.
Drawings
Fig. 1 is a sectional view of a flexible solid-state lithium battery.
Fig. 2 is a schematic structural diagram of an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of another embodiment of the present invention.
Fig. 4 is a schematic structural diagram of an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an embodiment of the present invention.
Description of the reference numerals
10 flexible solid lithium cell
12 first current collector
14 second collector layer
16 rubber frame
18 enclosed region
20 first active material layer
22 isolating layer
24 second active material layer
26 layer of electrochemical system
28 insulating the protective layer.
Detailed Description
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.
The solution is that an insulating protective layer is arranged on the periphery of the outer surface of the first current collecting layer or the second current collecting layer so as to avoid external short circuit caused by contact between the first current collecting layer and the second current collecting layer after bending. Please refer to fig. 2, which is a schematic diagram of an embodiment of the method. As shown in the figure, the flexible solid-state lithium battery 10 mainly includes a first current collecting layer 12, a second current collecting layer 14, and a plastic frame 16 sandwiched between the first current collecting layer 12 and the second current collecting layer 14 to form an enclosed region 18. An electrochemical system layer 26 is disposed in the enclosed region 18, 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, in this embodiment, the periphery of the first current collecting layer 12 or the second current collecting layer 14 is electrically insulated, and the periphery defined herein includes a side surface and/or a surface extending upward and/or downward from the side surface. For example, an insulating protection layer 28 is formed by coating and curing the periphery of the outer surface of the first current collecting layer 12 to prevent the first current collecting layer 12 and the second current collecting layer 14 from contacting during bending to generate an external short circuit. The insulating protective layer is a separate structure, or a part of the rubber frame, as shown in fig. 3, or can be an electrically insulating structure through surface treatment.
In the flexible solid-state lithium battery 10, the upper end surface of the rubber frame 16 is adhered to the first current collecting layer 12, and the lower end surface of the rubber frame 16 is adhered to the second current collecting layer 14, so that the electrochemical system layer 26 completely contained in the enclosed region 18 is completely located in the region of the first current collecting layer 12 and/or the second current collecting layer 14 in the orthographic projection direction, in other words, the orthographic projection area of the first active material layer 20 is smaller than the orthographic projection area of the first current collecting layer 12, and the orthographic projection area of the second active material layer 24 is smaller than the orthographic projection area of the second current collecting layer 14.
In addition, the glue frame 16 may be located completely or partially within the orthographic projection area of the first collector layer 12 and the second collector layer 14, namely, when the glue frame 16 is completely located in the orthographic projection area of the first collector layer 12 and the second collector layer 14, if the first collector layer 12 and the second collector layer 14 have the same length in cross section, the rubber frame 16 does not protrude beyond the first current collecting layer 12 and the second current collecting layer 14 at all, and if the first current collecting layer 12 and the second current collecting layer 14 have different lengths in cross section, the glue frame 16 is located in the orthographic projection area where the first collector layer 12 intersects the second collector layer 14, if the glue frame 16 is located locally in the orthographic projection area of the first collector layer 12 and the second collector layer 14, this means that the partial rubber frame 16 is exposed to the outside of the first collector layer 12 and the second collector layer 14 regardless of whether the first collector layer 12 and the second collector layer 14 have the same length in cross section.
Please refer to fig. 4, which is a diagram illustrating another embodiment of the present invention. The periphery of the outer surface of the second current collecting layer 14 is coated and cured to form an insulating protective layer 28, and the first current collecting layer 12 is larger than the second current collecting layer 14 in the orthographic projection direction, that is, the length of the first current collecting layer 12 is larger than that of the second current collecting layer 14, and the second current collecting layer 14 can be exchanged with the first current collecting layer 12.
Please refer to fig. 5, which is a diagram illustrating an embodiment of the present invention. As shown, unlike the previous structure of fig. 3, in this embodiment, the flexible lithium solid state batteries 10 share a first current collecting layer 12, and in this embodiment, the peripheries of the second current collecting layers 14 of the flexible lithium solid state batteries 10 are electrically insulated, for example, an insulating protection layer 28 is formed as described above. The peripheral edge is defined herein to include a side surface and/or a surface extending upward and/or downward from the side surface to avoid contact between the second collector layers 14 or with the first collector layers 12 when the first collector layers 12 are bent.
In a general lithium battery, a positive electrode or a negative electrode is formed by coating an active material layer on a current collecting layer and then cutting and drying the active material layer, so that the size of the active material layer of the positive electrode or the negative electrode is the same as that of the current collecting layer, and under the consideration of safety factors, the active material layer of the positive electrode must be smaller than that of the negative electrode, namely, the positive electrode must be smaller than that of the negative electrode. In the lithium battery structure 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, that is, the current collecting layer of the present invention has a size that is different from the size of the current collecting layer of the present invention in order to avoid the short circuit problem of the external current collecting layer contact. Referring to fig. 2, the first collector layer 12 may be a positive collector layer or a negative collector layer, and the second collector layer 14 may be a negative collector layer or a positive collector layer. In other words, 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, in the invention, at least one peripheral edge of the first current collecting layer and the second current collecting layer is electrically insulated, so that the first current collecting layer and the second current collecting layer of the flexible solid-state lithium battery can be prevented from contacting after being bent, thereby avoiding the external short circuit problem caused by the contact between the first current collecting layer and the second current collecting layer.
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 protection scope of the present invention.

Claims (11)

1. A flexible battery structure, comprising:
a first collector layer;
a second collector layer;
the rubber frame is clamped between the first current collecting layer and the second current collecting layer, 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 to form an enclosed area; and
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 layer being in contact with the first current collection layer, the second active material layer being in contact with the second current collection layer; wherein at least one of the first and second current collecting layers has an electrically insulating periphery, the periphery includes a side surface and a surface extending upward and/or downward from the side surface, the flexible battery is bent, and the electrically insulating periphery prevents the first and second current collecting layers from touching each other.
2. The cell structure of claim 1, wherein the electrochemical system layer is located within the first current collector layer and the second current collector layer in an orthographic direction.
3. The battery structure of claim 2, wherein an orthographic area of the first active material layer is less than an orthographic area of the first current collector layer.
4. The battery structure of claim 2, wherein an orthographic area of the second active material layer is less than an orthographic area of the second current collector layer.
5. The battery structure of claim 1, wherein the peripheral edge of at least one of the first current collecting layer or the second current collecting layer is provided with an insulating layer.
6. The battery structure of claim 5, wherein the insulating layer is also part of the adhesive frame.
7. The battery structure of claim 5, wherein the insulating layer is an electrically insulating structure by surface treatment.
8. The battery structure of claim 1, wherein at least a portion of the frame is located within an orthographic projection area of the first current collector layer and the second current collector layer.
9. The battery structure of claim 1, wherein a portion of the adhesive frame is further located outside an orthographic projection area of the first current collecting layer and the second current collecting layer.
10. The battery structure of claim 1, characterized in that it is a pouch battery.
11. A flexible battery structure, comprising:
a first collector layer;
a second collector layer;
the rubber frame is clamped between the first current collecting layer and the second current collecting layer, 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 to form an enclosed area; and
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 layer being in contact with the first current collection layer, the second active material layer being in contact with the second current collection layer; wherein at least one of the first and second current collecting layers has an electrically insulating periphery, the periphery includes a side surface or a surface extending upward and/or downward from the side surface, the flexible battery is bent, and the electrically insulating periphery prevents the first and second current collecting layers from touching each other.
CN201610893355.7A 2016-10-13 2016-10-13 Battery structure Active CN107946650B (en)

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CN107946650B true CN107946650B (en) 2020-12-04

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Publication number Priority date Publication date Assignee Title
CN108933227B (en) * 2017-05-23 2020-06-09 辉能科技股份有限公司 Battery structure

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002042885A (en) * 2000-07-19 2002-02-08 Kyocera Corp Mounting type lithium battery

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101207222B (en) * 2006-12-22 2011-03-16 辉能科技股份有限公司 Electrical energy supply system
JP6011799B2 (en) * 2012-01-27 2016-10-19 日産自動車株式会社 Assembled battery
US9871273B2 (en) * 2014-12-18 2018-01-16 Intel Corporation Surface mount battery and portable electronic device with integrated battery cell

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002042885A (en) * 2000-07-19 2002-02-08 Kyocera Corp Mounting type lithium battery

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