CN112133953A - Flexible battery and flexible display device - Google Patents

Flexible battery and flexible display device Download PDF

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Publication number
CN112133953A
CN112133953A CN202011149166.1A CN202011149166A CN112133953A CN 112133953 A CN112133953 A CN 112133953A CN 202011149166 A CN202011149166 A CN 202011149166A CN 112133953 A CN112133953 A CN 112133953A
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China
Prior art keywords
battery
flexible
electrolyte
conductive lines
polygon
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CN202011149166.1A
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Chinese (zh)
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CN112133953B (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 a flexible display device, 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 hollowed-out polygon; the battery unit includes: an electrolyte, and an electrode connected to the electrolyte; the electrode includes: an anode and a cathode; the positive lug is connected with the cathode; and the negative electrode tab is connected with the anode. In the embodiment of the invention, the bending performance of the flexible battery is realized by arranging the battery units into the hollowed-out polygons, and the elastic glue does not need to be filled, so that the stability of the bending performance of the flexible battery can be ensured.

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 the flexible display devices, such as flexible batteries, in which the existing flexible batteries are bendable 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 is influenced, and in addition, the density of the battery is reduced by filling the elastic glue, so that the cruising ability of the battery is influenced.
Disclosure of Invention
The invention provides a flexible battery, which aims to solve the problems that the bending effect of the conventional flexible battery is unstable and the cruising ability is low.
A 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 hollowed-out polygon; the battery unit includes: an electrolyte, and an electrode connected to the electrolyte; the electrode includes: an anode and a cathode;
the positive lug is connected with the cathode;
and the negative electrode tab is connected with the anode.
Optionally, adjacent battery cells are connected at the position of the corner of the polygon; each side of the polygon comprises: 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 locations 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 embedded in the middle of the electrolyte on each side of the polygon, and the polarities of the electrodes embedded on each adjacent side of the polygon are different.
Optionally, the positive tab is disposed on the first surface of the flexible electric core layer and connected to each of the cathodes; the negative electrode lug is arranged on a second surface of the flexible electric core layer, which is opposite to the first surface, and is connected with each anode.
Optionally, the shape of the electrolyte comprises: the middle position of the battery unit, which is the same as the shape of the battery unit, is a hollowed-out polygon; the anode is arranged on the first surface of the electrolyte, and the orthographic projection of the anode on the electrolyte is coincident with the electrolyte; the cathode is arranged on the second face of the electrolyte, and the orthographic projection of the cathode on the electrolyte is coincident with the electrolyte.
Optionally, the positive tab and the cathode are in the same plane, and the negative tab and the anode are in the same plane.
Optionally, each of the battery cells is arranged in an array.
Optionally, the polygon comprises: a quadrilateral shape.
Optionally, the positive tab comprises: at least two first conductive lines and two second conductive lines; each first lead is arranged in parallel; the first lead is connected with the cathodes in a row at the corresponding position; one of the second conductive lines is connected to the first end of each of the first conductive lines, and the other of the second conductive lines is connected to each of the optional negative electrode tabs, and includes: at least two third conductive lines and two fourth conductive lines; each third conducting wire is arranged in parallel; the third lead is connected with the anodes in a row at the corresponding position; one of the fourth conductive lines is connected to a first end of each of the third conductive lines, and the other of the fourth conductive lines is connected to a second end of each of the third conductive lines.
Optionally, the shape of the cutout 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 of the above.
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 hollowed-out polygon; the battery unit includes: an electrolyte, and an electrode connected to the electrolyte; the electrode includes: an anode and a cathode; the positive lug is connected with the cathode; and the negative electrode tab is connected with the anode. In the embodiment of the invention, the bending performance of the flexible battery is realized by arranging the battery units into the hollowed-out polygons, and the elastic glue does not need to be filled, so that the stability of the bending performance of the flexible battery can be ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic top view of a first flexible battery provided in 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 provided in an embodiment of the present invention;
fig. 4 is a schematic front view of a second flexible battery provided in an embodiment of the present invention;
fig. 5 is a schematic top view of a third flexible battery provided in an embodiment of the present invention;
fig. 6 is a schematic front view of a third flexible battery provided in an embodiment of the present invention;
fig. 7 is a schematic structural diagram 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 diagram of connection between battery cells according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and fig. 2, wherein fig. 2 is a cross-sectional view of fig. 1, which illustrates a schematic structural diagram of a flexible battery provided by an embodiment of the present invention, and includes:
a flexible electrical core layer 10, the flexible electrical core layer 10 comprising: a plurality of interconnected battery cells 11, the shape of the battery cells 11 comprising: the middle position is a polygon with a hollow A; the battery unit 11 includes: an electrolyte 111, and an electrode 112 connected to the electrolyte; the electrode 112 includes: an anode 1121 and a cathode 1122;
a positive tab 20, the positive tab 20 being connected to the cathode 1122;
and a negative tab 30, wherein the negative tab 30 is connected to the anode 1121.
In the embodiment of the present invention, the positive tab 20 includes a plurality of wires, the positive tab 20 is connected to each cathode 1122, and finally the plurality of wires of the positive tab 20 are collected to one position for leading out the positive electrode of the flexible battery; the negative electrode tab 30 includes a plurality of wires, 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-out A structure is arranged in the middle of the battery unit 11, so that the flexible battery can be ensured to have certain deformation in different directions, and the flexible battery can be bent. The flexible battery composed of the hollow-out battery units 11 is of a net-shaped structure, and the net-shaped structure is favorable for improving the reliability of flexible bending of the flexible battery structure. In addition, electrolyte 111, anode 1121, and cathode 1122 are each divided into fine cells, preventing the anode 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-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: ctotalC × N; where C is the capacity 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; c is expressed in mAh; the unit of delta is mAh/mm ^ 3.
Wherein, the material of the electrolyte is selected from a lithium cobaltate-graphite system, and the capacity density delta of the battery unit 11 is 0.3074 v (mAh/mm ^ 3); wherein ν is a correction parameter related to the volume V of the battery cell 11, and the value thereof is 0.85-1. The correction parameter v is closer to 1 as the volume fraction of the electrolyte in the battery cell is larger.
In the embodiment of the invention, the reduction of the proportion of the electrolyte in the battery unit can affect the polarization of the battery, but the hollow design and the arrangement of other paving materials can also occupy the moving volume, so that the correction parameter v is an empirical coefficient and is usually selected to be a fixed value.
In the embodiment of the invention, the area of the hollow part A can be set according to the bending requirement of the flexible battery, so that the bending performance of the flexible battery is ensured, the volume ratio of electrolyte in the battery unit is increased, and the cruising ability of the flexible battery is further improved.
In the embodiment of the present invention, referring to fig. 1, the adjacent battery cells 11 are connected at the positions of the corners of the polygon; each side of the polygon comprises: 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 invention, referring to fig. 1, in the polygon, the polarities of the electrodes at the connection locations of adjacent sides are the same.
Referring to fig. 1, in the battery cell, adjacent sides share one electrode at the corner formed by the adjacent sides, and therefore, the electrodes of the adjacent sides at the connection point have the same polarity and are anodes or cathodes.
In an embodiment of the present invention, referring to fig. 3 and 4, wherein fig. 4 is a cross-sectional view of fig. 3, the number of sides of the polygon is a double number; the 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 on each side of the polygon, and the polarities of the electrodes 112 embedded on adjacent sides of the polygon are different.
Referring to fig. 3, when the battery cell 11 has a rectangular shape, an anode 1121 is provided on one side of the rectangular shape, and a cathode 1122 is provided on the other side of the rectangular shape.
In the embodiment of the present invention, referring to fig. 1 to 4, the positive tab 20 is disposed on the first surface of the flexible core layer 10 and connected to each of the cathodes 1122; the negative electrode tab 30 is disposed on a second surface of the flexible electrical core 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 wraps 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 of the battery unit 11 which is the same as the shape of the battery unit is a polygon with a hollow 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 the second surface of the electrolyte 111, and an orthographic projection of the cathode 1122 on the electrolyte 111 coincides with the electrolyte.
In the present embodiment, in fig. 5, a rhombic electrolyte 111, a rhombic anode 1121 and a rhombic cathode 1122 are bent and overlapped to constitute one cell 11.
In the embodiment of the present invention, in fig. 5 and fig. 6, the electrolyte 111, the anode 1121, and the cathode 1122 have the same structure, the anode 1121, the cathode 1122 and the electrolyte 111 are in surface contact, the total contact area between the anode 1121, the cathode 1122, and the electrolyte 111 is further increased, the ion exchange rate of the flexible battery is 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 the single layer is ensured, and the reliability of the structure of the flexible battery is improved.
In the embodiment of the present invention, referring to fig. 6, the positive tab 20 and the cathode 1122 are located on the same plane, and the negative tab 30 and the anode 1121 are located on the same plane.
In the present embodiment, 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 comprises: a quadrilateral shape. In the embodiment of the present invention, the quadrangle in fig. 1 is a rhombus, and in fig. 3, the quadrangle is a rectangle. In the embodiment of the present invention, the battery unit may have other shapes according to actual needs, and is not limited herein.
In the embodiment of the present invention, the positive tab 20 includes: at least two first conductive lines 21 and two second conductive lines 22; the first conductive lines 21 are arranged in parallel; the first lead 21 is connected to the cathodes 1122 in a row at a corresponding position; one of the second conductive lines 22 is connected to a first end of each of the first conductive lines 21, and the other of the second conductive lines 22 is connected to a second end of each of the first conductive lines 21.
In the embodiment of the present invention, the negative electrode tab 30 includes: at least two third conductive lines 31 and two fourth conductive lines 32; the third conductive lines 31 are arranged in parallel; the third lead 31 is connected to the anodes 1121 in a row at a corresponding position; one of the fourth conductive lines 32 is connected to a first end of each of the third conductive lines 31, and the other of the fourth conductive lines 32 is connected to a second end of each of the third conductive lines 31.
In an embodiment of the present invention, the shape of the hollow includes: at least one of circular, square, rectangular, and triangular. In fig. 7, the battery unit 11 with the hollow a in the shape of a circle is shown, and in the embodiment of the present invention, the hollow a in different shapes may be set according to the requirements of the flexible battery for bending and curling performance, which is not limited herein.
In the embodiment of the present invention, the connection between adjacent battery cells 11 at the corner of the polygon means that, referring to fig. 1, the polygons are connected point to point through the corner, referring to fig. 8, one polygon and another polygon may be overlapped at the corner, and through the overlapping connection, referring to fig. 9, another way is to remove the sharp corner at the corner of the polygon and then connect through the wire; 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 the embodiments of the present invention provides a flexible display device, including the flexible battery described in any one of the above.
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 a flexible display device.
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 hollowed-out polygon; the battery unit includes: an electrolyte, and an electrode connected to the electrolyte; the electrode includes: an anode and a cathode; the positive lug is connected with the cathode; and the negative electrode tab is connected with the anode. In the embodiment of the invention, the bending performance of the flexible battery is realized by arranging the battery units into the hollowed-out polygons, and the elastic glue does not need to be filled, so that the stability of the bending performance of the flexible battery can be ensured.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (13)

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

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114667636A (en) * 2021-03-02 2022-06-24 宁德新能源科技有限公司 Flexible battery and manufacturing method thereof

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Publication number Priority date Publication date Assignee Title
US20040185334A1 (en) * 2003-03-20 2004-09-23 Matsushita Electric Industrial Co., Ltd. Integrated battery
CN104466229A (en) * 2013-09-25 2015-03-25 华为技术有限公司 Flexible lithium secondary battery and preparation method thereof
CN106207195A (en) * 2016-09-20 2016-12-07 广东国光电子有限公司 A kind of stacked flexible battery and preparation method thereof
CN208522025U (en) * 2018-05-15 2019-02-19 苏州清陶新能源科技有限公司 One kind having the electrode and its battery of " Bamboo summer sleeping mat structure "

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040185334A1 (en) * 2003-03-20 2004-09-23 Matsushita Electric Industrial Co., Ltd. Integrated battery
CN104466229A (en) * 2013-09-25 2015-03-25 华为技术有限公司 Flexible lithium secondary battery and preparation method thereof
CN106207195A (en) * 2016-09-20 2016-12-07 广东国光电子有限公司 A kind of stacked flexible battery and preparation method thereof
CN208522025U (en) * 2018-05-15 2019-02-19 苏州清陶新能源科技有限公司 One kind having the electrode and its battery of " Bamboo summer sleeping mat structure "

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114667636A (en) * 2021-03-02 2022-06-24 宁德新能源科技有限公司 Flexible battery and manufacturing method thereof

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