CN112133953B - Flexible battery and flexible display device - Google Patents

Flexible battery and flexible display device Download PDF

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Publication number
CN112133953B
CN112133953B CN202011149166.1A CN202011149166A CN112133953B CN 112133953 B CN112133953 B CN 112133953B CN 202011149166 A CN202011149166 A CN 202011149166A CN 112133953 B CN112133953 B CN 112133953B
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battery
flexible
electrolyte
polygon
flexible battery
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CN112133953A (en
Inventor
杨艳艳
祝尚杰
朱红
王蓓
陈思彤
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0436—Small-sized flat cells or batteries for portable equipment
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • 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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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The embodiment of the invention provides a flexible battery and flexible display equipment, wherein the flexible battery comprises: a flexible electrical core layer, the flexible electrical core layer comprising: a plurality of interconnected battery cells, the shape of the battery cells comprising: the middle position is a hollow polygon; the battery cell includes: an electrolyte, an electrode connected to the electrolyte; the electrode includes: an anode and a cathode; the positive electrode lug is connected with the cathode; and the negative electrode lug is connected with the anode. In the embodiment of the invention, the bending performance of the flexible battery is realized by arranging the battery unit into a hollow polygon without filling elastic glue, so that the stability of the bending performance of the flexible battery can be ensured, and secondly, the flexible battery only comprises a structure required for realizing the battery function and does not need to be filled with other substances, so that the volume capacity density of the battery can be improved, and the cruising ability of the flexible battery is further improved.

Description

Flexible battery and flexible display device
Technical Field
The invention relates to the technical field of display, in particular to a flexible battery and flexible display equipment.
Background
With the development of flexible display devices, there is an increasing demand for accessories of flexible display devices such as flexible batteries, and the existing flexible batteries realize the flexibility of the flexible batteries by providing a plurality of bending points in the batteries and filling elastic glue in gaps between adjacent bending points.
The existing flexible battery has the following problems that the elastic glue is solidified at low temperature and softened at high temperature, so that the stability of the bending effect of the flexible battery can be influenced.
Disclosure of Invention
The invention provides a flexible battery, which solves the problems of unstable bending effect and low endurance of the conventional flexible battery.
The first aspect of the present invention provides a flexible battery comprising:
a flexible electrical core layer, the flexible electrical core layer comprising: a plurality of interconnected battery cells, the shape of the battery cells comprising: the middle position is a hollow polygon; the battery cell includes: an electrolyte, an electrode connected to the electrolyte; the electrode includes: an anode and a cathode;
the positive electrode lug is connected with the cathode;
and the negative electrode lug is connected with the anode.
Optionally, adjacent battery cells are connected at the positions of the corners of the polygon; each side of the polygon includes: an electrolyte at an intermediate location, the anode at a first end location, and the cathode at a second end location.
Optionally, in the polygon, the polarities of the electrodes at the connection positions of adjacent sides are the same.
Optionally, the number of sides of the polygon is a double number; adjacent battery units share one side; each side of the polygon is the electrolyte; the electrodes are inlaid in the middle position of the electrolyte on each side of the polygon, and the polarities of the electrodes inlaid on the adjacent sides of the polygon are different.
Optionally, the positive electrode lug is arranged on the first surface of the flexible electric core layer and connected with each cathode; the negative electrode lugs are arranged on the second surfaces of the flexible battery core layer, which are opposite to the first surfaces, and are connected with the anodes.
Optionally, the shape of the electrolyte includes: the middle position with the same shape as the battery unit is a hollow polygon; the anode is arranged on the first surface of the electrolyte, and the orthographic projection of the anode on the electrolyte is overlapped with the electrolyte; the cathode is arranged on the second surface of the electrolyte, and the orthographic projection of the cathode on the electrolyte is coincident with the electrolyte.
Optionally, the positive electrode tab and the cathode are in the same plane, and the negative electrode tab and the anode are in the same plane.
Optionally, each of the battery cell arrays is arranged.
Optionally, the polygon includes: a quadrilateral.
Optionally, the positive tab includes: at least two first wires and two second wires; each first wire is arranged in parallel; the first lead is connected with a row of cathodes at the corresponding position; one of the second wires is connected to a first end of each of the first wires, and the other of the second wires is connected to each of the optional negative electrode tabs, the negative electrode tab including: at least two third wires and two fourth wires; each third wire is arranged in parallel; the third lead is connected with a row of anodes at the corresponding position; one fourth wire is connected with the first end of each third wire, and the other fourth wire is connected with the second end of each third wire.
Optionally, the hollowed-out shape includes: at least one of circular, square, rectangular, and triangular.
A second aspect of the invention provides a flexible display device comprising a flexible battery as described in any one of the preceding claims.
The embodiment of the invention provides a flexible battery, which comprises: a flexible electrical core layer, the flexible electrical core layer comprising: a plurality of interconnected battery cells, the shape of the battery cells comprising: the middle position is a hollow polygon; the battery cell includes: an electrolyte, an electrode connected to the electrolyte; the electrode includes: an anode and a cathode; the positive electrode lug is connected with the cathode; and the negative electrode lug is connected with the anode. In the embodiment of the invention, the bending performance of the flexible battery is realized by arranging the battery unit into a hollow polygon without filling elastic glue, so that the stability of the bending performance of the flexible battery can be ensured, and secondly, the flexible battery only comprises a structure required for realizing the battery function and does not need to be filled with other substances, so that the volume capacity density of the battery can be improved, and the cruising ability of the flexible battery is further improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic top view of a first flexible battery according to an embodiment of the present invention;
fig. 2 is a schematic front view of a first flexible battery according to an embodiment of the present invention;
fig. 3 is a schematic top view of a second flexible battery according to an embodiment of the present invention;
fig. 4 is a schematic front view of a second flexible battery according to an embodiment of the present invention;
fig. 5 is a schematic top view of a third flexible battery according to an embodiment of the present invention;
fig. 6 is a schematic front view of a third flexible battery according to an embodiment of the present invention;
fig. 7 is a schematic structural view of a battery unit according to an embodiment of the present invention;
fig. 8 is a schematic structural view of another connection between battery cells according to an embodiment of the present invention;
fig. 9 is a schematic structural view of still another connection between battery cells according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 and 2, fig. 2 is a cross-sectional view of fig. 1, illustrating a schematic structure of a flexible battery according to an embodiment of the present invention, including:
a flexible cell layer 10, the flexible cell layer 10 comprising: a plurality of battery cells 11 connected to each other, the shape of the battery cells 11 including: the middle position is a polygon hollowed out by A; the battery unit 11 includes: an electrolyte 111, an electrode 112 connected to the electrolyte; the electrode 112 includes: an anode 1121 and a cathode 1122;
a positive electrode tab 20, wherein the positive electrode tab 20 is connected to the cathode 1122;
a negative electrode tab 30, wherein the negative electrode tab 30 is connected to the anode 1121.
In the embodiment of the present invention, the positive electrode tab 20 includes a plurality of wires, the positive electrode tab 20 is connected with each cathode 1122, and finally the plurality of wires of the positive electrode tab 20 are collected to one place for leading out the positive electrode of the flexible battery; the negative electrode tab 30 includes a plurality of wires, and the negative electrode tab 30 is connected to each anode 1121, and finally the plurality of wires of the negative electrode tab 30 are collected to one place for leading out the negative electrode of the flexible battery.
In the embodiment of the invention, the hollow A structure is arranged in the middle of the battery unit 11, so that the flexible battery can be ensured to have a certain deformation in different directions, and the flexible battery can be bent. The flexible battery formed by the plurality of hollowed-out battery units 11 is of a net structure, and the net structure is beneficial to improving the reliability of flexible bending of the flexible battery structure. In addition, the electrolyte 111, the anode 1121 and the cathode 1122 are each divided into fine units, and the anode can be prevented from being enlarged in the position corresponding to the mesh structure. The total contact area of the cathode and the electrolyte improves the ion exchange rate of the flexible battery and further improves the charge and discharge efficiency of the flexible battery.
In the embodiment of the invention, the calculation formula of the total capacity of the flexible battery is as follows: c (C) total =c×n; where C is the capacitance of one battery cell 11, and N is the number of battery cells 11 included in the flexible battery. Wherein c=Δ×v; where Δ is the capacity density of the battery cell 11, and V is the volume of the battery cell 11; the unit of C is mAh; the unit of delta is mAh/mm 3.
Wherein the material of the electrolyte is lithium cobaltate-graphite system, the capacity density delta= 0.3074 v (mAh/mm 3) of the battery unit 11; where V is a correction parameter related to the volume V of the battery cell 11, and is 0.85-1. The correction parameter v is closer to 1 as the volume ratio of the electrolyte in the battery cell is larger.
In the embodiment of the invention, the reduction of the ratio of the electrolyte in the battery unit affects the polarization of the battery, but the hollowed design and the arrangement of other paving materials occupy the moving volume, so that the correction parameter v is an empirical coefficient, and a constant value is usually selected.
In the embodiment of the invention, the area of the hollowed-out part A can be set according to the bending requirement of the flexible battery, so that the flexible performance of the flexible battery is ensured, the volume ratio of the electrolyte in the battery unit is improved, and the cruising ability of the flexible battery is further improved.
In the embodiment of the present invention, referring to fig. 1, adjacent battery cells 11 are connected at the positions of the corners of the polygon; each side of the polygon includes: an electrolyte 111 at an intermediate position, the anode 1121 at a first end position, and the cathode 1122 at a second end position.
In an embodiment of the present invention, referring to fig. 1, in the polygon, the polarities of the electrodes at the connection positions of adjacent sides are the same.
In the battery cell, referring to fig. 1, the adjacent sides share an electrode at the corners formed by the adjacent sides, so that the electrodes of the adjacent sides at the connection place have the same polarity, and are anodes or cathodes.
In an embodiment of the present invention, reference is made to fig. 3 and 4, wherein fig. 4 is a cross-sectional view of fig. 3, and the number of sides of the polygon is a double number; adjacent battery cells 11 share one side; each side of the polygon is the electrolyte 111; the electrodes 112 are embedded in the middle of the electrolyte 111 at each side of the polygon, and the polarities of the electrodes 112 embedded in the adjacent sides of the polygon are different.
Referring to fig. 3, the battery cell 11 has a rectangular shape, and an anode 1121 is provided on one side of the rectangular shape, and a cathode 1122 is provided on the other side.
In an embodiment of the present invention, referring to fig. 1 to 4, the positive electrode tab 20 is disposed on the first surface of the flexible electrical core layer 10 and is connected to each of the cathodes 1122; the negative electrode tab 30 is disposed on a second surface of the flexible battery cell layer 10 opposite to the first surface, and is connected to each of the anodes 1121.
In an embodiment of the present invention, referring to fig. 2, 4 and 6, the flexible battery further includes an encapsulation film 40, wherein the encapsulation film 40 is coated on the outside of the flexible battery.
In an embodiment of the present invention, referring to fig. 5 and 6, the shape of the electrolyte 111 includes: the middle position with the same shape as the battery unit 11 is a polygon with a hollowed-out part A; the anode 1121 is disposed on a first surface of the electrolyte 111, and an orthographic projection of the anode 1121 on the electrolyte 111 coincides with the electrolyte 111; the cathode 1122 is disposed on a second surface of the electrolyte 111, and an orthographic projection of the cathode 1122 on the electrolyte 111 coincides with the electrolyte.
In the embodiment of the present invention, in fig. 5, a diamond-shaped electrolyte 111, a diamond-shaped anode 1121, and a diamond-shaped cathode 1122 are bent to overlap to form a battery cell 11.
In the embodiment of the present invention, in fig. 5 and 6, the structures of the electrolyte 111, the anode 1121 and the cathode 1122 are the same, the anode 1121 and the cathode 1122 are in surface contact with the electrolyte 111, so that the total contact area of the anode 1121 and the cathode 1122 with the electrolyte 111 is further increased, the ion exchange rate of the flexible battery is further increased, the charge and discharge efficiency of the flexible battery is further increased, and the same material is used in one layer, so that the uniformity of the properties of the materials in a single layer is ensured, and the reliability of the structure of the flexible battery is improved.
In an embodiment of the present invention, referring to fig. 6, the positive electrode tab 20 is in the same plane as the cathode 1122, and the negative electrode tab 30 is in the same plane as the anode 1121.
In the embodiment of the present invention, referring to fig. 1, 3 and 5, each of the battery cells 11 is arranged in an array.
In an embodiment of the present invention, the polygon includes: a quadrilateral. In the embodiment of the present invention, the quadrangle is diamond in fig. 1, and the quadrangle is rectangle in fig. 3. In the embodiment of the invention, the battery unit can be selected to have other shapes according to actual needs, and the shape is not limited herein.
In an embodiment of the present invention, the positive tab 20 includes: at least two first wires 21 and two second wires 22; each of the first wires 21 is arranged in parallel; the first lead 21 is connected to the cathode 1122 in a row at a corresponding position; one of the second wires 22 is connected to a first end of each of the first wires 21, and the other of the second wires 22 is connected to a second end of each of the first wires 21.
In an embodiment of the present invention, the negative electrode tab 30 includes: at least two third wires 31 and two fourth wires 32; each of the third wires 31 is arranged in parallel; the third lead 31 is connected to the anode 1121 in a row at a corresponding position; one of the fourth wires 32 is connected to a first end of each of the third wires 31, and the other of the fourth wires 32 is connected to a second end of each of the third wires 31.
In an embodiment of the present invention, the hollowed-out shape includes: at least one of circular, square, rectangular, and triangular. In fig. 7, the battery unit 11 with the hollow a being circular is shown, and in the embodiment of the present invention, different shapes of the hollow a may be set according to the bending and curling performance requirements of the flexible battery, which is not limited herein.
In the embodiment of the present invention, the connection between adjacent battery units 11 at the corners of the polygons means, referring to fig. 1, point-to-point connection between the polygons through corners, referring to fig. 8, or there may be overlap between one polygon and another polygon at the corners, and referring to fig. 9, by overlapping connection, a further way is that the polygons remove sharp corners at the corners and then connect by wires; in the embodiment of the present invention, the connection manner may be selected by a specific process, which is not limited herein.
Another aspect of an embodiment of the present invention provides a flexible display device, including a flexible battery as described in any one of the foregoing.
Wherein the flexible display device includes: a flexible display panel; the flexible display panel and the flexible battery provided by the embodiment of the invention form flexible display equipment.
The embodiment of the invention provides a flexible battery, which comprises: a flexible electrical core layer, the flexible electrical core layer comprising: a plurality of interconnected battery cells, the shape of the battery cells comprising: the middle position is a hollow polygon; the battery cell includes: an electrolyte, an electrode connected to the electrolyte; the electrode includes: an anode and a cathode; the positive electrode lug is connected with the cathode; and the negative electrode lug is connected with the anode. In the embodiment of the invention, the bending performance of the flexible battery is realized by arranging the battery unit into a hollow polygon without filling elastic glue, so that the stability of the bending performance of the flexible battery can be ensured, and secondly, the flexible battery only comprises a structure required for realizing the battery function and does not need to be filled with other substances, so that the volume capacity density of the battery can be improved, and the cruising ability of the flexible battery is further improved.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims (12)

1. A flexible battery, comprising:
a flexible electrical core layer, the flexible electrical core layer comprising: a plurality of interconnected battery cells, the shape of the battery cells comprising: the middle position is a hollow polygon; the battery cell includes: an electrolyte, an electrode connected to the electrolyte; the electrode includes: an anode and a cathode;
the positive electrode lug is connected with the cathode;
a negative electrode tab connected to the anode;
the flexible battery formed by the battery units is of a net structure;
the adjacent battery units are connected at the positions of the corners of the polygon; each side of the polygon includes: an electrolyte at an intermediate location, the anode at a first end location, and the cathode at a second end location.
2. The flexible battery of claim 1, wherein the polarities of the electrodes at the connection locations of adjacent sides are the same in the polygon.
3. The flexible battery of claim 1, wherein the number of sides of the polygon is a double number; adjacent battery units share one side; each side of the polygon is the electrolyte; the electrodes are inlaid in the middle position of the electrolyte on each side of the polygon, and the polarities of the electrodes inlaid on the adjacent sides of the polygon are different.
4. A flexible battery according to any one of claims 1 to 3, wherein the positive tab is disposed on a first face of the flexible cell layer, connected to each of the cathodes; the negative electrode lugs are arranged on the second surfaces of the flexible battery core layer, which are opposite to the first surfaces, and are connected with the anodes.
5. The flexible battery of claim 1, wherein the shape of the electrolyte comprises: the middle position with the same shape as the battery unit is a hollow polygon; the anode is arranged on the first surface of the electrolyte, and the orthographic projection of the anode on the electrolyte is overlapped with the electrolyte; the cathode is arranged on the second surface of the electrolyte, and the orthographic projection of the cathode on the electrolyte is coincident with the electrolyte.
6. The flexible battery of claim 5, wherein the positive tab is in the same plane as the cathode and the negative tab is in the same plane as the anode.
7. A flexible battery according to any one of claims 1 to 3, wherein each of the battery cell arrays is arranged.
8. The flexible battery of claim 7, wherein the polygon comprises: a quadrilateral.
9. The flexible battery of claim 8, wherein the positive tab comprises: at least two first wires and two second wires; each first wire is arranged in parallel; the first lead is connected with a row of cathodes at the corresponding position; one second wire is connected with the first end of each first wire, and the other second wire is connected with the second end of each first wire.
10. The flexible battery of claim 9, wherein the negative electrode tab comprises: at least two third wires and two fourth wires; each third wire is arranged in parallel; the third lead is connected with a row of anodes at the corresponding position; one fourth wire is connected with the first end of each third wire, and the other fourth wire is connected with the second end of each third wire.
11. The flexible battery of claim 1, wherein the hollowed-out shape comprises: at least one of circular, square, rectangular, and triangular.
12. A flexible display device comprising a flexible battery as claimed in any one of claims 1-11.
CN202011149166.1A 2020-10-23 2020-10-23 Flexible battery and flexible display device Active CN112133953B (en)

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