WO2018214919A1

WO2018214919A1 - Battery structure

Info

Publication number: WO2018214919A1
Application number: PCT/CN2018/088074
Authority: WO
Inventors: 杨思枬
Original assignee: 辉能科技股份有限公司; 辉能控股股份有限公司
Priority date: 2017-05-23
Filing date: 2018-05-23
Publication date: 2018-11-29
Also published as: CN108933227A; CN108933227B; JP3226660U; DE212018000211U1

Abstract

Provided is a battery structure, which mainly comprises a first collector layer, a second collector layer, an orthogonal projection direction of which is smaller than that of the first collector layer, and a glue frame sandwiched between the first collector layer and the second collector layer, so as to form an enclosed area, wherein an electrochemical system layer is arranged in the enclosed area, an insulation layer is arranged at the periphery of at least one of the first collector layer and the second collector layer, and the insulation layer is arranged by means of the first and second collector layers which are not equidistantly designed in the orthographic projection direction and at the periphery of at least one of the first collector layer and 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

The present application claims priority to the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the present disclosure.

Technical field

The invention relates to a battery structure, in particular to a battery structure, which has the effect of avoiding external short circuit.

Background technique

Under the demand of human technology, various wearable electronic devices have been created accordingly. In order to make various wearable electronic devices more light and thin, space allocation in electronic devices has become an important issue, and can be set in non-planar flexible. The curved battery brings one of the solutions to this problem. Please refer to FIG. 1 , which is a cross-sectional view showing the structure of a current flexible solid state lithium battery. As shown in the figure, the battery structure 40 mainly includes a first collector layer 42 , a second collector layer 44 , and a plastic frame 46 sandwiched between the first collector layer 42 and the second collector layer 44 . Forming a surrounding area, the contents of the enclosed area are sequentially provided with a first active material layer 50, a separating layer 52 and a second active material layer 54, a first active material layer 50, a separating layer 52 and a second active material. The material layer 54 constitutes the electrochemical system layer 56, and the first active material layer 50 is in contact with the first collector layer 42, and the second active material layer 54 is in contact with the second collector layer 44. The flexible solid-state lithium battery is characterized in that it is dynamically bendable as a whole, but an external short circuit occurs due to the contact of the first collector layer 42 with the second collector layer 44 during the bending process.

In view of the above problems, the present invention has been directed to the above-described drawbacks of the prior art, and proposes a battery structure to effectively overcome the above problems.

Summary of the invention

It is an object of the present invention to provide a battery structure in which the upper collector layer and the lower collector layer are different in length, and the periphery of at least one of the first collector layer or the second collector layer is electrically Insulation to avoid the external short circuit caused by the contact of the first and second collector layers when the battery is bent.

In order to achieve the above object, the present invention provides a battery structure. The battery mainly includes a first collector layer, a second collector layer that is smaller than the first collector layer in the forward projection direction, and a first collector layer. a plastic frame between the collector layer and the second collector layer, and at least part of the plastic frame overlaps the first collector layer and the second collector layer in the forward projection direction, so that the plastic frame, the first collector layer and the first layer The two collector layers together form a surrounding area, the sealing area is provided with an electrochemical system layer, comprising a first active material layer, a second active material layer and a first active material layer and a second An isolation layer between the active material layers, the first active material layer is in contact with the first collector layer, and the second active material layer is in contact with the second collector layer, at least in the first collector layer and the second collector layer An insulating layer is disposed on the periphery of one to avoid an external short circuit caused by contact between the first collector layer and the second collector layer after the bending.

Wherein, the plastic frame covers at least part of the insulating layer.

The plastic frame includes a first colloid layer and a second colloid layer. The first colloid layer is adhered to the first collector layer, and the second colloid layer is adhered to the second collector layer.

Wherein at least a portion of the insulating layer is covered by at least one of the first colloid layer and the second colloid layer.

The plastic frame further includes a third colloid layer sandwiched between the first colloid layer and the second colloid layer.

Wherein at least a portion of the insulating layer is covered by at least one of the first colloid layer, the second colloid layer, and the third colloid layer.

Wherein the electrochemical system layer is located within the second collector layer in the orthogonal projection direction.

The orthographic projection area of the first active material layer is smaller than the orthographic projection area of the first collector layer.

The orthographic projection area of the second active material layer is smaller than the orthographic projection area of the second collector layer.

The difference between the size of the first collector layer and the second collector layer in the forward projection direction is D, and the height of the frame is T, and D is not greater than T.

Wherein, the circumference includes a side surface and/or a surface extending upward and/or downward from the side surface.

Wherein, the insulating layer is a separate structure and/or a part of the plastic frame and/or a structure that is electrically insulated by surface treatment.

The method further includes a protective layer disposed on an outer surface of at least one of the first collector layer and the second collector layer.

Wherein, the protective layer is a separate structure and/or is a part of the insulating layer.

Among them, it is a flexible battery.

In order to achieve the above object, the present invention provides another battery structure. The battery mainly includes a first collector layer, a second collector layer smaller than the first collector layer in the front projection direction, and a second collector layer. a plastic frame between the collector layer and the second collector layer, and at least a portion of the plastic frame overlaps the first collector layer and the second collector layer in the forward projection direction, so that the plastic frame, the first collector layer, and The second collector layer collectively forms a surrounding area, the sealing area is provided with an electrochemical system layer, comprising a first active material layer, a second active material layer and a first active material layer and a first active material layer a separation layer between the two active material layers, the first active material layer is in contact with the first collector layer, and the second active material layer is in contact with the second collector layer, at least in the first collector layer and the second collector layer One of the peripheral edges is provided with an insulating layer, and at least a portion of the insulating layer is covered by the plastic frame to avoid an external short circuit caused by the contact between the first collector layer and the second collector layer after the bending.

Among them, it is a flexible battery.

In order to achieve the above object, the present invention provides a battery structure. The battery mainly includes a first collector layer, a second collector layer that is smaller than the first collector layer in the forward projection direction, and a first collector layer. a plastic frame between the collector layer and the second collector layer, and at least part of the plastic frame overlaps the first collector layer and the second collector layer in the forward projection direction, so that the plastic frame, the first collector layer and the first layer The two collector layers together form a surrounding area, the sealing area is provided with an electrochemical system layer, comprising a first active material layer, a second active material layer and a first active material layer and a second An isolation layer between the active material layers, the first active material layer is in contact with the first collector layer, and the second active material layer is in contact with the second collector layer, at least in the first collector layer and the second collector layer An insulating layer is disposed on the periphery of the first layer, and the insulating layer covers at least a portion of the plastic frame to avoid an external short circuit caused by the contact between the first collector layer and the second collector layer after the bending.

Among them, it is a flexible battery.

DRAWINGS

1 is a cross-sectional view showing the structure of a current flexible solid state lithium battery.

2A-2D are schematic views showing the structure of a first embodiment of the present invention.

3A-3C are schematic views showing the structure of a second embodiment of the present invention.

4A to 4O are schematic views showing the structure of a second embodiment of the present invention.

5A-1 to 5A-9 are schematic views showing the structure of a second embodiment of the present invention.

5B-1 to 5B-27 are schematic views showing the configuration of a second embodiment of the present invention.

5C-1 to 5C-27 are schematic views showing the configuration of a second embodiment of the present invention.

6A-6I are schematic views showing the structure of a third embodiment of the present invention.

Description of the reference numerals

10, 40 battery structure

12, 42 first collector layer

14, 44 second collector layer

16,46 plastic frame

161 first colloid layer

162 second colloid layer

163 third colloid layer

20, 50 first active material layer

22, 52 isolation layer

24, 54 second active material layer

26, 56 electrochemical system layer

28 insulation

30 protective layer

T height

D size difference

detailed description

The purpose, technical contents, features and effects achieved by the present invention will be more readily understood by the detailed description of the embodiments.

The invention provides a solution to the problem that the flexible solid lithium battery has an external short circuit due to mutual contact after the bending of the first and second collector layers.

Please refer to FIG. 2A, which is a schematic structural view of a first embodiment of the present invention. As shown in the figure, the battery structure 10 mainly includes a first collector layer 12, a second collector layer 14 that is smaller than the first collector layer 12 in the front projection direction, and a first collector layer. a plastic frame 16 between the 12 and the second collector layer 14 , wherein the plastic frame 16 at least partially overlaps the first collector layer 12 and the second collector layer 14 in the orthogonal projection direction to pass through the first collector layer 12 , The second collector layer and the plastic frame 16 together form a surrounding area, the sealing area is provided with an electrochemical system layer 26, and the electrochemical system layer 26 includes a first active material layer 20 and a second active material layer. 24 and a spacer layer 22 disposed between the first active material layer 20 and the second active material layer 24, the first active material layer 20 is in contact with the first collector layer 12, and the second active material layer 24 is connected to the second collector layer The layer 14 is in contact with an insulating layer 28 on the periphery of at least one of the first collector layer 12 and the second collector layer 14 through the first collector layer 12 and the second collector layer 14 in the front projection direction. The difference in length, and the arrangement of the insulating layer, to avoid contact between the first collector layer 12 and the second collector layer 14 during bending causes an external short circuit. The perimeter defined herein is a surface that includes one side surface and/or extends upward and/or downward from the side surface. The insulating layer 28 is a separate structure and/or is part of the bezel 16 and/or is electrically insulated by surface treatment.

In addition, as shown in FIG. 2B, the plastic frame 16 of the battery structure includes a first colloid layer 161 and a second colloid layer 162, and the first colloid layer 161 is adhered to the first collector layer 12, and the second colloid layer 162 is The second collector layer 14 is bonded. Moreover, as shown in FIG. 2C, the plastic frame 16 of the battery structure further includes a first colloid layer 161, a second colloid layer 162, and a third colloid layer 163, and the third colloid layer 163 is sandwiched between the first colloid layer. 161 is between the second colloid layer 162.

Please refer to FIG. 3A, FIG. 3B and FIG. 3C, which are schematic diagrams of the first structure of the second embodiment of the present invention. As shown in the figure, the battery structure mainly includes a first collector layer 12, a second collector layer 14 that is smaller than the first collector layer 12 in the forward projection direction, and a second collector layer 12 that is sandwiched between the first collector layer 12. a plastic frame 16 between the second collector layer 14 and the second collector layer 14 at least partially overlapping the first collector layer 12 and the second collector layer 14 in the forward projection direction to pass through the first collector layer 12, The second collector layer 14 and the plastic frame 16 together form a surrounding area. The enclosed area is provided with an electrochemical system layer 26. The electrochemical system layer 26 includes a first active material layer 20 and a second active material layer. 24 and a spacer layer 22 disposed between the first active material layer 20 and the second active material layer 24, the first active material layer 20 is in contact with the first collector layer 12, and the second active material layer 24 is connected to the second collector layer The layer 14 is in contact with an insulating layer 28 on the periphery of at least one of the first collector layer 12 and the second collector layer 14, and at least a portion of the insulating layer 28 is covered by the bezel 16 through the first collector layer. The difference in length between the 12 and second collector layers 14 in the forward projection direction, and the arrangement of the insulating layers to avoid the first collector layer 12 and the second collector layer 14 Contact occurs during bending to create an external short circuit. The perimeter defined herein is a surface that includes one side surface and/or extends upward and/or downward from the side surface. The insulating layer 28 is a separate structure and/or is part of the bezel 16 and/or is electrically insulated by surface treatment.

In addition, the plastic frame 16 of the battery structure may include a first colloid layer 161 and a second colloid layer 162. The first colloid layer 161 is bonded to the first collector layer 12, and the second colloid layer 162 and the second collector layer are bonded. 14 is bonded, and at least one of the first colloid layer 161 and the second colloid layer 162 covers at least a portion of the insulating layer 28, that is, as shown in FIGS. 4D, 4E, and 4F, at least partially The insulating layer 28 is covered by the first colloid layer 161, or as shown in FIGS. 4A, 4B, and 4C, at least a portion of the insulating layer 28 is covered by the second colloid layer 162, or as shown in FIGS. 4G to 4O. At least a portion of the insulating layer 28 is covered by the first colloid layer 161 and the second colloid layer 162.

Moreover, the plastic frame 16 of the battery structure further includes a first colloid layer 161, a second colloid layer 162 and a third colloid layer 163. The third colloid layer 163 is sandwiched between the first colloid layer 161 and the second colloid layer 162. And at least one of the first colloid layer 161, the second colloid layer 162, and the third colloid layer 163 covers at least a portion of the insulating layer 28. That is, in the case where the insulating layer 28 is only covered by one of the first colloid layer 161, the second colloid layer 162, and the third colloid layer 163, it may be as shown in FIG. 5A-1 and FIG. 5A-2. As shown in FIG. 5A-3, at least a portion of the insulating layer 28 is covered by the second colloid layer 162, or as shown in FIGS. 5A-4, 5A-5, and 5A-6, at least a portion of the insulating layer 28 is third. The colloid layer 163 is coated, or as shown in FIGS. 5A-7, 5A-8, and 5A-9, at least a portion of the insulating layer 28 is covered by the first colloid layer 161; at the same time, the insulating layer 28 is simultaneously coated with the first colloid In the case where two of the layer 161, the second colloid layer 162, and the third colloid layer 163 are coated, as shown in FIGS. 5B-1 to 5B-9, at least a portion of the insulating layer 28 is second. The colloid layer 162 and the third colloid layer 163 are coated, or as shown in FIGS. 5B-10 to 5B-18, at least a portion of the insulating layer 28 is covered by the first colloid layer 161 and the third colloid layer 163, or 5B-19 to 5B-27, at least a portion of the insulating layer 28 is covered by the first colloid layer 161 and the second colloid layer 162; the insulating layer 28 is covered by the first colloid layer 161, the second colloid layer 162, and The third colloid layer 163 is simultaneously wrapped Under the situation, as shown in FIG 5C-1 to 5C-27, 161 by a first adhesive layer, second adhesive layer 162 and the third insulating layer 163 colloidal layer 28 is coated with a different change.

Please refer to FIG. 6A, FIG. 6B and FIG. 6C, which are schematic structural diagrams of a third embodiment of the present invention. As shown in the figure, the battery structure mainly includes a first collector layer 12, a second collector layer 14 that is smaller than the first collector layer 12 in the forward projection direction, and a second collector layer 12 that is sandwiched between the first collector layer 12. a plastic frame 16 between the second collector layer 14 and the second collector layer 14 at least partially overlapping the first collector layer 12 and the second collector layer 14 in the forward projection direction to pass through the first collector layer 12, The two collector layers 14 and the plastic frame 16 together form a surrounding area. The enclosed area is provided with an electrochemical system layer 26. The electrochemical system layer 26 includes a first active material layer and a second active material layer 24. And a spacer layer 22 disposed between the first active material layer 20 and the second active material layer 24, the first active material layer 20 is in contact with the first collector layer 12, and the second active material layer 24 and the second collector layer 14 contact, an insulating layer 28 is disposed on a periphery of at least one of the first collector layer 12 and the second collector layer 14, and the insulating layer 28 covers at least a portion of the plastic frame 16 through the first collector layer 12 and a difference in length of the second collector layer 14 in the orthogonal projection direction, and an arrangement of the insulating layer to prevent the first collector layer 12 and the second collector layer 14 from being Generating an external short circuit contact off. The perimeter defined herein is a surface that includes one side surface and/or extends upward and/or downward from the side surface. The insulating layer 28 is a separate structure and/or is part of the bezel 16 and/or is electrically insulated by surface treatment.

In addition, please refer to FIG. 6D, FIG. 6E and FIG. 6F. As shown, the plastic frame 16 of the battery structure may include a first colloid layer 161 and a second colloid layer 162, and the first colloid layer 161 and the first collector layer. The layer 12 is bonded, and the second colloid layer 162 is bonded to the second collector layer 14. In addition, please refer to FIG. 6G, FIG. 6H and FIG. 6I. As shown, the plastic frame 16 of the battery structure may further include a first colloid layer 161, a second colloid layer 162 and a third colloid layer 163, and a third colloid. The layer 163 is sandwiched between the first colloid layer 161 and the second colloid layer 162.

Moreover, in all of the above embodiments, the battery structure 10 may further include a protective layer 30. Referring again to FIG. 2A, the protective layer 30 is disposed outside at least one of the first collector layer 12 and the second collector layer 14. The surface is exemplified by the first collector layer 12, and the protective layer 30 is disposed on the other surface of the first active material layer 20, wherein the protective layer 30 is a separate structure and/or as shown in FIG. 2D, the protective layer 30 is an insulating layer. Part of 285.

Moreover, in the structure of all the embodiments described above, the covering condition between the insulating layer and the plastic frame may vary according to requirements, for example, the insulating layer of the first embodiment may be simultaneously present in the first collector layer in the battery structure. In the case where the peripheral edge and at least a portion of the insulating layer of the second embodiment are covered by a frame, there are of course cases where the three embodiments exist simultaneously in the same battery structure. In the case where the protective layer is present in the present invention, the structure of the collector layer can be protected, and the metal surface of the collector layer can be prevented from being oxidized or broken by impact.

According to the battery structure of the present invention, since the upper end surface of the plastic frame is adhered to the first collector layer, the lower end surface of the plastic frame is adhered to the second collector layer, so that the electrochemical system layer completely accommodated in the enclosed area is The positive projection direction will appear completely in the region of the first collector layer and/or the second collector layer, that is, the orthographic projection area of the first active material layer is smaller than the orthographic projection area of the first collector layer, The orthographic projection area of the two active material layers is smaller than the orthographic projection area of the second collector layer.

In addition, in the orthographic projection direction, the plastic frame may be completely or partially located in the orthographic projection area of the first collector layer and the second collector layer, that is, when the plastic frame is completely located in the first collector. When the first collector layer and the second collector layer have the same length in the cross section, if the first collector layer and the second collector layer have the same length in the cross section, the plastic frame does not protrude from the first collector layer and the second layer at all. In addition to the collector layer, if the first collector layer and the second collector layer have different lengths in cross section, the glue frame is located in the orthographic projection area where the first collector layer and the second collector layer intersect. When the plastic frame is locally located in the orthographic projection area of the first collector layer and the second collector layer, it means that whether the first collector layer and the second collector layer have the same length in the cross section or not, the local The plastic frames all appear to protrude beyond the first collector layer and the second collector layer.

Referring to FIG. 2A, the difference between the size of the first collector layer and the second collector layer in the forward projection direction is D, and the height of the frame is T, and D is not greater than T. The reason why D must not be larger than T is that since the bent D has the thickness of the collector layer itself, in the case of D=T, even if the bending is 90 degrees, it does not contact the other collector layer.

In a general lithium battery, after the active material layer is coated on the collector layer and then subjected to a cutting and drying process to form a so-called positive electrode or a negative electrode, the active material layer of the positive electrode or the negative electrode has the same size as the collector layer, based on safety factors. Considering that the positive active material layer must be smaller than the negative active material layer design, that is, the positive electrode must be smaller than the negative electrode. The so-called safety factor is because if the lithium ion is embedded in the negative electrode, if the space of the negative electrode is insufficient, the lithium dendrite is generated in a large amount. The lithium dendrite punctures the isolation layer and causes a short circuit between the internal positive and negative electrodes. In the lithium battery architecture of the present invention, the size of the collector layer is not related to the size of the positive and negative electrodes described above. In other words, the smaller collector layer previously described in the present invention may also be the collector layer of the negative electrode, which is larger. The collector layer may also be a collector layer of the positive electrode. The collector layer of the present invention has a size difference in order to avoid a short circuit problem of contact of the external collector layer. For this reason, please refer to FIG. 2A, the first collector layer 12 in this figure may be a positive collector layer or a negative collector layer, and the second collector layer 14 is corresponding to a negative collector layer or a positive collector. Floor. That is to say, when the first collector layer 12 is a negative collector layer, the second collector layer 14 is a cathode collector layer, and this embodiment is completely different from the existing general lithium battery architecture.

In summary, the present invention provides an insulating layer by the first and second collector layers which are designed in a non-equal length in the forward projection direction, and at the periphery of at least one of the first collector layer and the second collector layer. Therefore, the first and second collector layers can be protected from contact after the flexible solid lithium battery is bent, thereby avoiding the external short circuit problem caused by the contact of the first and second collector layers.

However, the above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All changes and modifications of the features and spirits of the inventions are intended to be included within the scope of the invention.

Claims

A battery structure, comprising:

a first collector layer;

a second collector layer that is smaller than the first collector layer in a right projection direction;

a plastic frame interposed between the first collector layer and the second collector layer, and at least partially overlapping the first collector layer and the second collector layer in a front projection direction, the plastic frame The first collector layer and the second collector layer form a surrounding area;

An electrochemical system layer disposed in the enclosing area, the electrochemical system layer comprising a first active material layer, a second active material layer, and the first active material layer and the second active material layer An isolation layer, the first active material is in contact with the first collector layer, and the second active material layer is in contact with the second collector layer;

An insulating layer disposed on a periphery of at least one of the first collector layer and the second collector layer.
The battery structure of claim 1 wherein the frame covers at least a portion of the insulating layer.
The battery structure according to claim 1 , wherein the plastic frame comprises a first colloid layer and a second colloid layer, the first colloid layer is adhered to the first collector layer, and the second colloid layer is Bonding to the second collector layer.
The battery structure according to claim 3, wherein at least a portion of the insulating layer is covered by at least one of the first colloid layer and the second colloid layer.
The battery structure according to claim 3, wherein the plastic frame further comprises a third colloid layer, the third colloid layer being interposed between the first colloid layer and the second colloid layer.
The battery structure according to claim 5, wherein at least a portion of the insulating layer is covered by at least one of the first colloid layer, the second colloid layer, and the third colloid layer.
The battery structure of claim 1 wherein the electrochemical system layer is located within the second collector layer in a right projection direction.
The battery structure according to claim 7, wherein the first active material layer has an orthographic projection area smaller than an orthographic projection area of the first collector layer.
The battery structure according to claim 7, wherein the second active material layer has an orthographic projection area smaller than an orthographic projection area of the second current collection layer.
The battery structure according to claim 1, wherein the difference between the size of the first collector layer and the second collector layer in the forward projection direction is D, and the height of the frame is T, then D Not more than T.
The battery structure of claim 1 wherein the perimeter comprises a side surface and/or a surface extending upwardly and/or downwardly from the side surface.
The battery structure according to claim 1, wherein the insulating layer is a separate structure and/or is a part of the frame and/or is electrically insulated by surface treatment.
The battery structure according to claim 1, further comprising a protective layer disposed on an outer surface of at least one of the first collector layer and the second collector layer.
The battery structure of claim 13 wherein the protective layer is a separate structure and/or is part of the insulating layer.
The battery structure of claim 1 which is a flexible battery.
A battery structure, comprising:

a first collector layer;

a second collector layer that is smaller than the first collector layer in a right projection direction;

a plastic frame interposed between the first collector layer and the second collector layer, and at least partially overlapping the first collector layer and the second collector layer in a front projection direction, the plastic frame The first collector layer and the second collector layer form a surrounding area;

An electrochemical system layer disposed in the enclosing area, the electrochemical system layer comprising a first active material layer, a second active material layer, and the first active material layer and the second active material layer An isolation layer, the first active material is in contact with the first collector layer, the second active material layer is in contact with the second collector layer, and an insulating layer is disposed on the first collector layer a periphery of at least one of the second collector layers, and at least a portion of the insulating layer is covered by the frame.
The battery structure according to claim 16, wherein the plastic frame comprises a first colloid layer and a second colloid layer, the first colloid layer is adhered to the first collector layer, and the second colloid layer is Bonding to the second collector layer.
The battery structure according to claim 17, wherein at least a portion of the insulating layer is covered by at least one of the first colloid layer and the second colloid layer.
The battery structure according to claim 17, wherein the plastic frame further comprises a third colloid layer, the third colloid layer being interposed between the first colloid layer and the second colloid layer.
The battery structure according to claim 19, wherein at least a portion of the insulating layer is covered by at least one of the first colloid layer, the second colloid layer, and the third colloid layer.
The battery structure of claim 16 wherein the electrochemical system layer is located within the second collector layer in a right projection direction.
The battery structure according to claim 21, wherein the first active material layer has an orthographic projection area smaller than an orthographic projection area of the first collector layer.
The battery structure according to claim 21, wherein the second active material layer has an orthographic projection area smaller than an orthographic projection area of the second current collection layer.
The battery structure according to claim 16, wherein the difference between the size of the first collector layer and the second collector layer in the forward projection direction is D, and the height of the frame is T, then D Not more than T.
The battery structure of claim 16 wherein the perimeter comprises a side surface and/or a surface extending upwardly and/or downwardly from the side surface.
The battery structure according to claim 16, wherein the insulating layer is a separate structure and/or is a part of the bezel and/or is electrically insulated by surface treatment.
The battery structure according to claim 16, further comprising a protective layer disposed on an outer surface of at least one of the first collector layer and the second collector layer.
The battery structure of claim 27 wherein the protective layer is a separate structure and/or is part of the insulating layer.
The battery structure of claim 16 which is a flexible battery.
A battery structure, comprising:

a first collector layer;

a second collector layer that is smaller than the first collector layer in a right projection direction;

a plastic frame interposed between the first collector layer and the second collector layer, and at least partially overlapping the first collector layer and the second collector layer in a front projection direction, the plastic frame The first collector layer and the second collector layer form a surrounding area;

An electrochemical system layer disposed in the enclosing area, the electrochemical system layer comprising a first active material layer, a second active material layer, and the first active material layer and the second active material layer An isolation layer, the first active material is in contact with the first collector layer, the second active material layer is in contact with the second collector layer, and an insulating layer is disposed on the first collector layer a periphery of at least one of the second collector layers and covering at least a portion of the frame.
The battery structure according to claim 30, wherein the plastic frame comprises a first colloid layer and a second colloid layer, the first colloid layer is adhered to the first collector layer, and the second colloid layer Bonding to the second collector layer.
The battery structure according to claim 31, wherein the plastic frame further comprises a third colloid layer, the third colloid layer being interposed between the first colloid layer and the second colloid layer.
30. The battery structure of claim 30, wherein the electrochemical system layer is located within the second collector layer in a right projection direction.
The battery structure according to claim 33, wherein the first active material layer has an orthographic projection area smaller than an orthographic projection area of the first collector layer.
The battery structure according to claim 33, wherein the second active material layer has an orthographic projection area smaller than an orthographic projection area of the second current collection layer.
The battery structure according to claim 30, wherein the difference between the size of the first collector layer and the second collector layer in the forward projection direction is D, and the height of the frame is T, then D Not more than T.
30. The battery structure of claim 30, wherein the perimeter comprises a side surface and/or a surface extending upwardly and/or downwardly from the side surface.
The battery structure according to claim 30, wherein the insulating layer is a separate structure and/or is a part of the frame and/or is electrically insulated by surface treatment.
The battery structure according to claim 30, further comprising a protective layer disposed on an outer surface of at least one of the first collector layer and the second collector layer.
A battery structure according to claim 39, wherein the protective layer is a separate structure and/or is part of the insulating layer.
A battery structure according to claim 30, which is a flexible battery.