AU2018272338A1 - Battery structure - Google Patents

Battery structure Download PDF

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Publication number
AU2018272338A1
AU2018272338A1 AU2018272338A AU2018272338A AU2018272338A1 AU 2018272338 A1 AU2018272338 A1 AU 2018272338A1 AU 2018272338 A AU2018272338 A AU 2018272338A AU 2018272338 A AU2018272338 A AU 2018272338A AU 2018272338 A1 AU2018272338 A1 AU 2018272338A1
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AU
Australia
Prior art keywords
layer
glue
electricity collecting
active material
battery structure
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Abandoned
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AU2018272338A
Inventor
Szu-Nan Yang
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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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Application filed by Prologium Holding Inc, Prologium Technology Co Ltd filed Critical Prologium Holding Inc
Publication of AU2018272338A1 publication Critical patent/AU2018272338A1/en
Priority to AU2020100217A priority Critical patent/AU2020100217A4/en
Abandoned legal-status Critical Current

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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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
    • 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
    • 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
    • H01M50/186—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
    • 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
    • H01M50/59—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

Disclosed is a battery structure, which mainly comprises a first collector layer, a second collector layer, and a glue frame for bonding the first collector layer and the second collector layer. The first collector layer, the second collector layer and the glue frame form an enclosed area, and an electrochemical system layer is arranged in the enclosed area, with the electrochemical system layer comprising a first active material layer, a second active material layer and an isolation layer arranged between the first active material layer and the second active material layer, wherein the first active material layer is in contact with the first collector layer, the second active material layer is in contact with the second collector layer, and an insulation layer is arranged on the surface of an outer side wall of the glue frame and extends to the periphery of the first collector layer and/or the second collector layer, so as to prevent an external short circuit caused by contact between the first collector layer and the second collector layer after bending.

Description

BATTERY STRUCTURE
Technical Field
The present application relates generally to electrochemical technology, and particularly to a battery structure capable of avoiding external short circuit.
BACKGROUND
To meet people’s needs, various wearable electronic devices are developed. The utilization of the space inside electronic devices has become an important issue for complying with the trend of lightness and compactness for electronic devices. The flexible battery that can be disposed in a nonplanar space is one of the strategies to solve the issue. Please refer to Figure 1, which shows a structural cross-sectional view of the flexible solid-state lithium battery according to the prior art. As shown in the figure, the flexible solid-state lithium battery 40 mainly comprises a first electricity collecting layer 42, a second electricity collecting layer 44, a glue frame 46 sandwiched between the first electricity collecting layer 42 and the second electricity collecting layer 44 for forming a closed region. This closed region includes a first active material layer 50, an isolation layer 52, and a second active material layer 54. The first active material layer 50, the isolation layer 52, and the second active material layer 54 form an electrochemical system layer 56. In addition, the first active material layer 50 contacts the first electricity collecting layer 42; the second active material layer 54 contacts the second electricity collecting layer 44. The property of the flexible solid-state lithium battery 40 is that the whole flexible solid-state lithium battery 40 can be bent dynamically. Unfortunately, during the bending process, the first electricity collecting layer 42 and the second electricity collecting layer 44 might contact and lead to external short circuit.
Accordingly, to solve the drawback of current technology as descried above, the present application provides a battery structure.
SUMMARY
An objective of the present application is to provide a battery structure, in which an insulation layer is disposed on one or more periphery of the first electricity collecting layer and/or the second electricity collecting layer for avoiding external short circuit due to a contact between the first electricity collecting layer and the second electricity collecting layer while bending the battery.
Another objective of the present application is to provide a battery structure, in which an insulation layer is disposed on one or more periphery of the first electricity collecting layer and/or the second electricity collecting layer. The glue frame gluing and fixing the first electricity collecting layer and the second electricity collecting layer is further covered by an insulation layer for avoiding external short circuit due to a contact between the first electricity collecting layer and the second electricity collecting layer while bending the battery.
Another objective of the present application is to provide a battery structure, in which an insulation layer is disposed on one or more periphery of the first electricity collecting layer and/or the second electricity collecting layer. The glue frame sandwiched between the first electricity collecting layer and the second electricity collecting layer is formed by multiple glue layers. One or more of the multiple glue layers is covered by an insulation layer for avoiding external short circuit due to a contact between the first electricity collecting layer and the second electricity collecting layer while bending the battery.
A further objective of the present application is to provide a battery structure, in which the glue frame sandwiched between the first electricity collecting layer and the second electricity collecting layer is formed by multiple glue layers. An insulation layer is disposed on the external sidewall of the glue layer and extends to the electricity collecting layers for avoiding external short circuit due to a contact between the first electricity collecting layer and the second electricity collecting layer while bending the battery.
To achieve the above objectives, the present application provides a battery structure, which mainly comprises a first electricity collecting layer, a second electricity collecting layer, a glue frame, an electrochemical system layer, and an insulation layer. The glue frame glues and fixes the first electricity collecting layer and the second electricity collecting layer. The first electricity collecting layer and the second electricity collecting layer form a closed region. The electrochemical system layer is disposed inside the closed region. The electrochemical system layer 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 contacts the first electricity collecting layer; the second active material layer contacts the second electricity collecting layer. The insulation layer is disposed on the periphery of the first electricity collecting layer and/or the second electricity collecting layer. The glue frame covers the insulation layer for avoiding external short circuit due to a contact between the first electricity collecting layer and the second electricity collecting layer while bending the battery.
The present application further provides another battery structure, which mainly comprises a first electricity collecting layer, a second electricity collecting layer, a glue frame, an electrochemical system layer, and an insulation layer. The glue frame is sandwiched between the first electricity collecting layer and the second electricity collecting layer for forming a closed region. The glue frame includes a first glue layer and a second glue layer. The first glue layer is glued to the first electricity collecting layer; the second glue layer is glued to the second electricity collecting layer. The electrochemical system layer is disposed inside the closed region. The electrochemical system layer 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 contacts the first electricity collecting layer; the second active material layer contacts the second electricity collecting layer. The insulation layer is disposed on the periphery of the first electricity collecting layer and/or the second electricity collecting layer.
The present application further provides another battery structure, which mainly comprises a first electricity collecting layer, a second electricity collecting layer, a glue frame, an electrochemical system layer, and an insulation layer. The glue frame is sandwiched between the first electricity collecting layer and the second electricity collecting layer for forming a closed region. The electrochemical system layer is disposed inside the closed region. The electrochemical system layer 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 contacts the first electricity collecting layer; the second active material layer contacts the second electricity collecting layer. The insulation layer is disposed on the external sidewall of the glue frame and extends to the periphery of the first electricity collecting layer and/or the second electricity collecting layer.
According to an embodiment of the present application, the battery structure described above can be a flexible battery or a soft pack battery.
The glue frame further includes a third glue layer sandwiched between the first glue layer and the second glue layer.
The materials of the first glue layer and the second glue layer are different from the material of the third glue layer. The former has better adhesion than the latter.
The orthographic projection of the electrochemical layer is located within the first electricity collecting layer and the second electricity collecting layer.
The orthographic projection area of the first active material layer is smaller than the orthographic projection area of the first electricity collecting layer.
The orthographic projection area of the second active material layer is smaller than the orthographic projection area of the second electricity collecting layer.
The periphery includes a side surface and/or an extended surface extending upward and/or downward from the side surface.
The first electricity collecting layer and/or the second electricity collecting layer include a protection layer on the outer surface.
The benefit of the present application is that the external short circuit due to a contact between the first electricity collecting layer and the second electricity collecting layer while bending the battery can be avoided.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 shows a structural cross-sectional view of the flexible solid-state lithium battery according to the prior art;
Figures 2a to 2d show structural schematic diagrams according to an embodiment of the present application;
Figures 3 a to 3 c show structural schematic diagrams according to another embodiment of the present application;
Figures 4a to 4c show structural schematic diagrams according to another embodiment of the present application;
Figures 5 a to 5 c show structural schematic diagrams according to another embodiment of the present application;
Figures 6a to 6e show structural schematic diagrams according to an embodiment of the present application;
Figures 7a to 7g show structural schematic diagrams according to an embodiment of the present application;
Figures 8a to 8f show structural schematic diagrams according to an embodiment of the present application;
Figures 9a to 9d show structural schematic diagrams according to an embodiment of the present application;
Figures 10a to 101 show structural schematic diagrams according to an embodiment of the present application;
Figures 11a to lib show structural schematic diagrams according to an embodiment of the present application;
Figures 12a to 12f show structural schematic diagrams according to an embodiment of the present application;
Figures 13a to 13b show structural schematic diagrams according to an embodiment of the present application;
Figures 14a to 14b show structural schematic diagrams according to an embodiment of the present application;
Figures 15a to 15d show structural schematic diagrams according to an embodiment of the present application;
Figures 16a to 16r show structural schematic diagrams according to an embodiment of the present application;
Figures 17a to 17b show structural schematic diagrams according to an embodiment of the present application;
Figures 18a to 18c show structural schematic diagrams according to an embodiment of the present application;
Figures 19a to 19c show structural schematic diagrams according to an embodiment of the present application;
Figures 20a to 20c show structural schematic diagrams according to an embodiment of the present application; and
Figure 21 shows a structural schematic diagram according to an embodiment of the present application.
DETAILED DESCRIPTION
In order to make the structure and characteristics as well as the effectiveness of the present application to be further understood and recognized, the detailed description of the present application is provided as follows along with embodiments and accompanying figures.
The present application provides various solutions for avoiding external short circuit due to a contact between the first electricity collecting layer and the second electricity collecting layer while bending a flexible solid-state lithium battery. In the following, the periphery includes the side surface and/or an extended surface extending upward and/or downward from the side surface. In addition, the present application provides solutions for avoiding external short circuit due to a contact between the first electricity collecting layer and the second electricity collecting layer while bending a flexible solid-state lithium battery. Thereby, the main structure of the flexible solid-state lithium battery is the same as the one shown in Figure 1. In the following figures, only a portion of the schematic diagram is used for described the technical characteristics of the present application.
Method 1: Glue frame covers the insulation layer
As shown in Figure 2a, the flexible solid-state lithium battery 10 capable of avoiding external short circuit mainly comprises a first electricity collecting layer 12, a second electricity collecting layer 14, a glue frame 16, an electrochemical system layer 26, and one or more insulation layer 28. The glue frame 16 glues and fixes the first electricity collecting layer 12 and the second electricity collecting layer 14. The first electricity collecting layer 12 and the second electricity collecting layer 14 form a closed region. The electrochemical system layer 26 is disposed inside the closed region. 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 contacts the first electricity collecting layer 12; the second active material layer 24 contacts the second electricity collecting layer 14. The one or more insulation layer 28 is disposed on the periphery of the first electricity collecting layer 12 and/or the second electricity collecting layer 14. In addition, the glue frame 16 covers the insulation layer 28. Using this design, when the flexible solid-state lithium battery 10 bends , the insulation layer 28 can avoid external short circuit due to a contact between the first electricity collecting layer 12 and the second electricity collecting layer 14. The above gluing and fixing means gluing the first electricity collecting layer 12, the second electricity collecting layer 14, and the glue frame 16 for making their locations fixed.
In Figure 2a, the glue frame 16 covers the insulation layer 28 completely. Alternatively, the glue frame 16 can cover the insulation layer 28 ,and the both are aligned on the edge. For example, they are aligned on the side surface b or the bottom surface a, as shown in Figure 2b or Figure 2c. Besides, the insulation layer 28 can extend from the periphery of the first electricity collecting layer 12 and/or the second electricity collecting layer 14 to the surface and act as a protection layer, as shown in Figure 2d.
The glue frame 16 described above (as shown in Figure 2a), the first electricity collecting layer 12, and the second electricity collecting layer 14 form a closed region for accommodating the electrochemical system layer 26. Thereby, in the orthographic projection direction, the electrochemical system layer 26 completely contained in the closed region will be within the regions of the first electricity collecting layer 12 and the second electricity collecting layer 14. In other words, the orthographic projection area of the first active material layer 20 is smaller than the orthographic projection area of the first electricity collecting layer 12; the orthographic projection area of the second active material layer 24 is smaller than the orthographic projection area of the second electricity collecting layer 14.
In addition, according to another embodiment, the glue frame 16 described above can be partially located within the orthographic projection regions of the first electricity collecting layer 12 and the second electricity collecting layer 14. For example, the glue frame 16 can protrude outside the orthographic projection regions of the first electricity collecting layer 12 and the second electricity collecting layer 14. Namely, if the first electricity collecting layer 12 and the second electricity collecting layer 14 have identical lengths in a cross section, the glue frame 16 can protrude outside the orthographic projection regions of the first electricity collecting layer 12 and the second electricity collecting layer 14 (not shown in the figure).
Next, please refer to Figure 3a to Figure 3c. The glue frame 16 shown can include a first glue layer 161 and a second glue layer 162. The first glue layer 161 is glued to the first electricity collecting layer 12; the second glue layer 162 is glued to the second electricity collecting layer 14. The materials of the first glue layer 161 and the second glue layer 162 can be different or identical. The first glue layer 161 and/or a second glue layer 162 cover the insulation layer 28.
For example, as shown in Figure 3 a, the first glue layer 161 covers the insulation layer 28 completely. Alternatively, the first glue layer 161 is partially aligned with the edge of the insulation layer 28, as shown in the structure of Figure 3b or Figure 3c.
In addition, it can be that the second glue layer 162 covers the insulation layer 28 completely, as shown in Figure 4a. Alternatively, the second glue layer 162 is partially aligned with the edge of the insulation layer 28, as shown in the structure of Figure 4b or Figure 4c.
Alternatively, the first glue layer 161 and the second glue layer 162 can cover the insulation layer 28 concurrently. Then, like the previous examples, both of the first glue layer 161 and the second glue layer 162 can cover the insulation layer 28 completely. Alternatively, a portion of the edges of the first glue layer 161 and the second glue layer 162 are both aligned with the insulation layer 28. The above conditions are shown in Figures 5a, 5b, and 5c, respectively.
In addition, given that the first glue layer 161 completely covers the insulation layer 28, the second glue 162 can aligned with the first glue 161 on different edges, as shown in Figures 6a and 6b. Alternatively, the first glue layer 161 partially covers the insulation layer 28. Some edges of the insulation layer 28 are exposed outside the first glue layer 161. The second glue layer 162 completely covers the first glue layer 161 and extends to the edges of the of portion of the insulation layer 28 exposed outside the first glue layer 161, as shown in Figures 6c and 6d. Alternatively, the first glue layer 161 and the second glue layer 162 are partially aligned, as shown in Figure 6e.
Next, please refer to Figures 7a to 7g, in which the glue frame 16 can further include a third glue layer 163. The third glue layer 163 is sandwiched between the first glue layer 161 and the second glue layer 162. Under this condition, various cover structures can be formed by the three glue layers 161, 162, and 163 with respect to the insulation layer 28 for avoiding a contact between the first electricity collecting layer 12 and the second electricity collecting layer 14. Then the first glue layer 161 and the second glue layer 162 can adjust the composition of their materials according to the first electricity collecting layer 12 and the second electricity collecting layer 14 connected to them. Thereby, the materials of the first glue layer 161 and the second glue layer 162 can be different from the material of the third glue layer 163 and have a good quality of adhesion.
For example, one or more of the first glue layer 161, the second glue layer 162, and the third glue layer 163 completely covers the insulation layer 28, as shown in Figures 7a to 7g. Alternatively, any edge of the first glue layer 161, the second glue layer 162, and the third glue layer 163 can be aligned with the insulation layer 28, as shown in Figures 8a to 8f. For example, in Figure 8a, the first glue layer 161 is aligned with the insulation layer 28 on the side edge. In Figure 8b, the first glue layer 161 is aligned with the insulation layer 28 on the bottom edge.
When the first glue layer 161 completely covers the insulation layer 28, the second glue layer 162 and/or the third glue layer 163 cover the first glue layer 161 and is aligned with the first glue layer 161 on some edges, as shown in Figures 9a to 9d.
According to another embodiment, the first glue layer 161 covers the insulation layer 28 with partial edge alignment while the second glue layer 162 or the third glue layer 163 completely covers the first glue layer 161. Alternatively, the second glue layer 162 or the third glue layer 163 also extends to cover the sidewall of the insulation layer 28 exposed outside the first glue layer 161. Alternatively, the second glue layer 162 or the third glue layer 163 can cover the first glue layer 161 with partial edge alignment, as shown in Figures 10a to 101. For example, in Figures 10a to 10c, the first glue layer 161 and the insulation layer 28 are aligned on the side edge while the third glue layer 163 completely covers the first glue layer 161 and extends to cover the sidewall of the insulation layer 28 exposed outside the first glue layer 161, as shown in Figure 10a. Alternatively, the third glue layer 163 covers the first glue layer 161 with their side edges are partially aligned, as shown in Figure 10b. Alternatively, the third glue layer 163 covers the first glue layer 161 with their bottom edges are partially aligned, as shown in Figure 10c. In figures lOd to 1 Of, the first glue layer 161 and the insulation layer 28 are aligned on the bottom edges. The location of the third glue layer 163 with respect to the first glue layer 161 is described above. Here, the details will not be repeated. In Figures lOg to 101, the relative structural arrangementof the first glue layer 161, the second glue layer 162, and the insulation layer 28 is varied. Due to the similarity with previous description, the details will not be described again.
According to another embodiment, the third glue layer 163 completely covers the insulation layer 28. In addition, the second glue layer 162 covers the third glue layer 163 and is aligned with the third glue layer 163 on partial edges, as shown in Figures 11ato lib.
According to another embodiment, the third glue layer 163 covers the insulation layer 28 with partial edge alignment. In addition, the second glue layer 162 completely covers the third glue layer 163. Alternatively, the second glue layer 162 also extends to cover the insulation layer 28, as shown in Figures 12a or 12e. Alternatively, the second glue layer 162 covers the third glue layer 163 with partial edge alignment, as shown in Figures 12b to 12d and Figure 12f.
According to another embodiment, the first glue layer 161 and the third glue layer 163 completely cover the insulation layer 28 sequentially. Namely, the first glue layer 161 completely covers the insulation layer 28, and the third glue layer 163 completely covers the outer periphery of the first glue layer 161 and thus covering the insulation layer 28 completely. The second glue layer 162 covers the third glue layer 163 with partial edge alignment, as shown in Figures 13a to 13b.
According to another embodiment, the first glue layer 161 and the second glue layer 162 completely cover the insulation layer 28 sequentially. Namely, the first glue layer 161 completely covers the insulation layer 28, and the third glue layer 163 covers first glue layer 161 with partial edge alignment. The second glue layer 162 completely covers the outer periphery of the first glue layer 161 and the third glue layer 163 and thus completely covers the insulation layer 28, as shown in Figures 14a to 14b.
According to another embodiment, the first glue layer 161 completely covers the insulation layer 28. The third glue layer 163 covers the first glue layer 161 with partial edge alignment. The second glue layer 162 covers the third glue layer 163 or the first glue layer 161 with partial edge alignment with the first glue layer 161 or the third glue layer 163, as shown in Figures 15a to 15d.
According to another embodiment, the first glue layer 161 covers the insulation layer 28 with partial edge alignment. The third glue layer 163 completely or partially covers the first glue layer 161. In addition, the second glue layer 162, like the previous description, can completely cover the third glue layer 163 and further extend to cover the side edge of the insulation layer 28. Alternatively, the second glue layer 162 can partially cover the third glue layer 163, as shown in Figures 16a to 16r.
Method 2: Electricity collecting layers include insulation layer on the periphery
As shown in Figure 17a, the flexible solid-state lithium battery 10 capable of avoiding external short circuit mainly comprises a first electricity collecting layer 12, a second electricity collecting layer 14, a glue frame 16, an electrochemical system layer 26, and one or more insulation layer 28. The glue frame 16 is sandwiched between the first electricity collecting layer 12 and the second electricity collecting layer 14 for forming a closed region. The glue frame 16 includes a first glue layer 161 and a second glue layer 162. The first glue layer 161 is glued to the first electricity collecting layer 12; the second glue layer 162 is glued to the second electricity collecting layer 14. The electrochemical system layer 26 is disposed inside the closed region. 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 contacts the first electricity collecting layer 12; the second active material layer 24 contacts the second electricity collecting layer 14. The one or more insulation layer 28 is disposed on the periphery of the first electricity collecting layer 12 and/or the second electricity collecting layer 14. Given the design, when the flexible solid-state lithium battery 10 is bent, external short circuit due to contact between the first electricity collecting layer 12 and the second electricity collecting layer 14 can be avoided. The materials of the first electricity collecting layer 12 and the second electricity collecting layer 14 can be different or essentially identical.
As shown in Figure 17b, the glue frame 16 as described above can further include a third glue layer 163 sandwiched between the first glue layer 161 and the second glue layer 162. For the above flexible solid-state lithium battery 10, in the orthographic projection direction, the electrochemical system layer 26 completely contained in the closed region will be within the regions of the first electricity collecting layer 12 and the second electricity collecting layer 14. In other words, the orthographic projection area of the first active material layer 20 is smaller than the orthographic projection area of the first electricity collecting layer 12; the orthographic projection area of the second active material layer 24 is smaller than the orthographic projection area of the second electricity collecting layer 14.
Method 3: Insulation layer disposed on the external sidewall of glue frame and extending to the peripheries of the first electricity collecting layer and/or the second electricity collecting layer
As shown in the embodiments of Figures 18a to 18c, the flexible solid-state lithium battery 10 capable of avoiding external short circuit mainly comprises a first electricity collecting layer 12, a second electricity collecting layer 14, a glue frame 16, an electrochemical system layer 26, and one or more insulation layer 28. The glue frame 16 is sandwiched between the first electricity collecting layer 12 and the second electricity collecting layer 14 for forming a closed region. The electrochemical system layer 26 is disposed inside the closed region. 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 contacts the first electricity collecting layer 12; the second active material layer 24 contacts the second electricity collecting layer 14. The one or more insulation layer 28 is disposed on the external sidewall of the glue frame 16 and extends to the periphery of the first electricity collecting layer 12 and/or the second electricity collecting layer 14. Given the design, when the flexible solid-state lithium battery 10 is bent, external short circuit due to contact between the first electricity collecting layer 12 and the second electricity collecting layer 14 can be avoided.
Please refer to Figure 18a, which is a schematic diagram according to the embodiment of Method 3. According to the embodiment, the insulation layer 28 is disposed on the external sidewall of the glue frame 16 and extends to the bottom surface a of the first electricity collecting layer 12. In Figures 18b to 18c, the insulation layer 28 further extends to the side surface b or the top surface c of the second electricity collecting layer 14.
Moreover, the glue frame 16 as described above can further include a first glue layer 161 and a second glue layer 162. The first glue layer 161 is glued to the first electricity collecting layer 12; the second glue layer 162 is glued to the second electricity collecting layer 14. The materials of the first glue layer 161 and the second glue layer 162 can be different or identical. When the glue frame 16 is formed by the first glue layer 161 and the second glue layer 162, the above embodiment includes the conditions shown in Figures 19a to 19c. For example, in Figure 19a, the insulation layer 28 is mainly disposed on the external sidewall of the first glue layer 161 with one end extending to the bottom surface a of the first electricity collecting layer 12 and the other end extending to the second glue layer 162. In Figures 19b to 19c, the insulation layer 28 further extends to the side surface b or the top surface c of the second electricity collecting layer 14.
The glue frame 16 as described above can further include a third glue layer 163 sandwiched between the first glue layer 161 and the second glue layer 162. When the glue frame 16 is formed by the first glue layer 161/ the third glue layer 163/the second glue layer 162 sequentially, the above embodiment includes the conditions shown in
Figures 20a to 20c. Although the insulation layer 28 according to the embodiment in Figure 20a is disposed on the external sidewall of the first glue layer 161 with one end extending to the third glue layer 163, a person having ordinary skill in the art knows that the end can extend to the second glue layer 162 as well.
In a general lithium battery, the positive and negative electrodes are manufactured by coating active material layers on electricity collecting layers before cutting and drying processes. Thereby, the sizes of the active material layers for positive and negative electrodes are identical to the ones of the electricity collecting layers. Due to safety concern, the active material layer for positive electrode must be smaller than the one for negative electrode. In other word, the positive electrode must be smaller than the negative electrode. The so-called safety concern is that when lithium ions are embedded into the negative electrode, if the available space in the negative electrode is not sufficient, massive lithium dendrites will be generated, which will further puncture through the isolation later and lead to short-circuit problem by an internal contact between the positive and negative electrodes. According to all the embodiment of the present application as described above, the first electricity collecting layer 12 can be an electricity collecting layer for positive electrode or for negative electrode ,and the second electricity collecting layer 14 can be an electricity collecting layer for negative electrode or for positive electrode correspondingly. In other words, when the first electricity collecting layer 12 is the electricity collecting layer for negative electrode, the second electricity collecting layer 14 is the electricity collecting layer for positive electrode. There is no size consideration for electricity collecting layers owing to the safety concern. This is quite different from the battery architecture according to the prior art.
Furthermore, in all the embodiment as described above, a protection layer 30 can be formed or disposed on the outer surface of the first electricity collecting layer 12 and/or the second electricity collecting layer 14 of the flexible solid-state lithium battery 10 for protecting or supporting the first electricity collecting layer 12 and/or the second electricity collecting layer 14, as shown in Figure 21. In addition, the condition of the protection layer 30 disposed on the outer surface of the second electricity collecting layer 14 is not illustrated.
To sum up, according to the present application, various forms of the insulation layer disposed on one or more periphery of the first and second electricity collecting layers and the glue frame are developed to avoid a contact between the first and the second electricity collecting layers after the flexible solid-state lithium battery is bent. Thereby, the external short-circuit problem due to a contact between the first and the second electricity collecting layers can be thus avoided.
The foregoing description is only embodiments of the present application, not used to limit the scope and range of the present application. Those equivalent changes or modifications made according to the shape, structure, feature, or spirit described in the claims of the present application are included in the appended claims of the present application.

Claims (32)

1. A battery structure, comprising: a first electricity collecting layer;
a second electricity collecting layer;
a glue frame, glued and fixed to said first electricity collecting layer and said second electricity collecting layer, and said glue frame, said first electricity collecting layer, and said second electricity collecting layer forming a closed region;
an electrochemical system layer, disposed in said closed region, including a first active material layer, a second active material layer, and an isolation layer disposed between said first active material layer and said second active material layer, said first active material layer contacting said first electricity collecting layer,andsaid second active material layer contacting said second electricity collecting layer; and at least one insulation layer, disposed on the periphery of said first electricity collecting layer and/or said second electricity collecting layer;
wherein said glue frame covers said insulation layer.
2. The battery structure of claim 1, wherein said glue frame includes a first layer and a second glue layer,said first glue layer is glued to said first electricity collecting layer, said second glue layer is glued to said second electricity collecting layer and said first glue layer and/or said second glue layer cover said insulation layer.
3. The battery structure of claim 2, wherein said glue frame further includes a third glue layer sandwiched between said first glue layer and said second glue layer.
4. The battery structure of claim 3, wherein the materials of said first glue layer and said second glue layer are different from the material of said third glue layer.
5. The battery structure of claim 3, wherein one or more of said first glue layer, said second glue layer, and said third glue layer covers said insulation layer.
6. The battery structure of claim 1, wherein said electrochemical system layer is located within said first electricity collecting layer and said second electricity collecting layer in the orthographic projection direction.
7. The battery structure of claim 6, wherein the orthographic projection area of said first active material layer is smaller than the orthographic projection area of said first electricity collecting layer.
8. The battery structure of claim 6, wherein the orthographic projection area of said second active material layer is smaller than the orthographic projection area of said second electricity collecting layer.
9. The battery structure of claim 1, wherein said periphery includes a side surface and/or an extended surface extending upward and/or downward from said side surface.
10. The battery structure of claim 1, wherein said battery structure can be a flexible battery or a soft pack battery.
11. The battery structure of claim 1, wherein a protection layer is disposed on the outer surfaces of said first electricity collecting layer and/or said second electricity collecting layer.
12. A battery structure, comprising: a first electricity collecting layer;
a second electricity collecting layer;
a glue frame, sandwiched between said first electricity collecting layer and said second electricity collecting layer for forming a closed region, said glue frame including a first glue layer and a second glue layer, said first glue layer glued to said first electricity collecting layer, and said second glue layer glued to said second electricity collecting layer;
an electrochemical system layer, disposed in said closed region, including a first active material layer, a second active material layer, and an isolation layer disposed between said first active material layer and said second active material layer, said first active material layer contacting said first electricity collecting layer, and said second active material layer contacting said second electricity collecting layer; and at least one insulation layer, disposed on the periphery of said first electricity collecting layer and/or said second electricity collecting layer.
13. The battery structure of claim 12, wherein said first glue layer and/or said second glue layer cover said insulation layer.
14. The battery structure of claim 12, wherein said glue frame further includes a third glue layer sandwiched between said first glue layer and said second glue layer.
15. The battery structure of claim 14, wherein the materials of said first glue layer and said second glue layer are different from the material of said third glue layer.
16. The battery structure of claim 14, wherein one or more of said first glue layer, said second glue layer, and said third glue layer covers said insulation layer.
17. The battery structure of claim 12, wherein said electrochemical system layer is located within said first electricity collecting layer and said second electricity collecting layer in the orthographic projection direction.
18. The battery structure of claim 17, wherein the orthographic projection area of said first active material layer is smaller than the orthographic projection area of said first electricity collecting layer.
19. The battery structure of claim 17, wherein the orthographic projection area of said second active material layer is smaller than the orthographic projection area of said second electricity collecting layer.
20. The battery structure of claim 12, wherein said periphery includes a side surface and/or an extended surface extending upward and/or downward from said side surface.
21. The battery structure of claim 12, wherein said battery structure can be a flexible battery or a soft pack battery.
22. The battery structure of claim 12, wherein a protection layer is disposed on the outer surfaces of said first electricity collecting layer and/or said second electricity collecting layer.
23. A battery structure, comprising: a first electricity collecting layer;
a second electricity collecting layer;
a glue frame, sandwiched between said first electricity collecting layer and said second electricity collecting layer for forming a closed region;
an electrochemical system layer, disposed in said closed region, including a first active material layer, a second active material layer, and an isolation layer disposed between said first active material layer and said second active material layer, said first active material layer contacting said first electricity collecting layer, and said second active material layer contacting said second electricity collecting layer; and an insulation layer, disposed on the surface of the external sidewall of said glue frame, and extending to the periphery of said first electricity collecting layer and/or said second electricity collecting layer.
24. The battery structure of claim 23, wherein said electrochemical system layer is located within said first electricity collecting layer and said second electricity collecting layer in the orthographic projection direction.
25. The battery structure of claim 24, wherein the orthographic projection area of said first active material layer is smaller than the orthographic projection area of said first electricity collecting layer.
26. The battery structure of claim 24, wherein the orthographic projection area of said second active material layer is smaller than the orthographic projection area of said second electricity collecting layer.
27. The battery structure of claim 23, wherein said periphery includes a side surface and/or an extended surface extending upward and/or downward from said side surface.
28. The battery structure of claim 23, wherein said glue frame includes a first layer and a second glue layer ,said first glue layer is glued to said first electricity collecting layer ,and said second glue layer is glued to said second electricity collecting layer.
29. The battery structure of claim 28, wherein said glue frame further includes a third glue layer sandwiched between said first glue layer and said second glue layer.
30. The battery structure of claim 23, wherein the materials of said first glue layer and said second glue layer are different from the material of said third glue layer.
31. The battery structure of claim 23, wherein said battery structure can be a flexible battery or a soft pack battery.
32. The battery structure of claim 23, wherein a protection layer is disposed on the outer surfaces of said first electricity collecting layer and/or said second electricity collecting layer.
AU2018272338A 2017-05-23 2018-05-23 Battery structure Abandoned AU2018272338A1 (en)

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