CN218351514U - Folding electrode, battery pack and electrical appliance - Google Patents

Abstract

The utility model discloses a folding electrode, a battery pack and an electric appliance, wherein the folding electrode comprises a flexible substrate, a plurality of first electrode layers, a plurality of second electrode layers and an electrolytic layer; the first electrode layers are arranged on one side surface of the flexible substrate at intervals, the second electrode layers are arranged on the same side surface of the flexible substrate at intervals and are opposite to the first electrode layers one by one, and the polarity of each first electrode layer is opposite to that of the opposite second electrode layer; the flexible substrate is provided with a folding line positioned between the first electrode layer and the second electrode layer; the electrolyte layer is arranged on the first electrode layer and/or the second electrode layer; the flexible substrate can be folded along the folding line, so that each first electrode layer is opposite to the corresponding second electrode layer, and the electrolytic layer is in contact with the first electrode layer and the second electrode layer. The utility model discloses a folding electrode can solve the relatively poor technical problem of current sandwich structure film battery production efficiency low, electrode alignment coincide precision.

Description

Folding electrode, battery pack and electrical appliance

Technical Field

The utility model belongs to the technical field of the battery, concretely relates to folding electrode, group battery and use electrical apparatus.

Background

With the increasing miniaturization of electronic products and the increasing demand for portable energy, the thin film battery has the advantages of good flexibility, multiple installation scenes, fast heat dissipation, high production efficiency and the like, so that the thin film battery becomes the development trend of the portable energy.

When a traditional thin-film battery with a sandwich structure is manufactured, positive and negative electrodes are required to be respectively printed on the front surface of one flexible substrate and the back surface of the other flexible substrate, and then the two printed flexible substrates are aligned and overlapped, so that the production process is complex and the efficiency is extremely low; and because the electrodes are printed separately, the reference is not uniform, and the electrodes positioned on the two flexible substrates can not be accurately aligned when the superposition operation is carried out.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above disadvantages of the prior art, an object of the present invention is to provide a foldable electrode, which aims to solve the technical problems of low production efficiency, poor precision of electrode alignment and lamination of the prior sandwich structure thin film battery.

The utility model discloses a reach its purpose, the technical scheme who adopts as follows:

a folded electrode comprising a flexible substrate, a plurality of first electrode layers, a plurality of second electrode layers, and an electrolyte layer; wherein:

the first electrode layers are arranged on one side surface of the flexible substrate at intervals, the second electrode layers are arranged on the same side surface of the flexible substrate at intervals and are opposite to the first electrode layers one by one, and each first electrode layer is opposite to the second electrode layer opposite to the first electrode layer in polarity; a folding line is arranged on the flexible substrate and is positioned between the first electrode layer and the second electrode layer; the electrolytic layer is arranged at any one or two of the first electrode layer and the second electrode layer;

the flexible substrate is used for being folded along the folding line so that each first electrode layer is opposite to the corresponding second electrode layer, and the electrolytic layer is in contact with the first electrode layer and the second electrode layer.

Further, a collector layer is arranged on the flexible substrate; wherein,

each first electrode layer is opposite in polarity to the adjacent first electrode layer, and each second electrode layer is opposite in polarity to the adjacent second electrode layer;

the collector layer is at least used for connecting at least two adjacent first electrode layers, and/or the collector layer is at least used for connecting at least two adjacent second electrode layers.

Further, the folding electrode further comprises a flexible membrane, the flexible membrane is arranged on the first electrode layer, and/or the flexible membrane is arranged on the second electrode layer;

when the flexible substrate is folded along the folding line, the flexible diaphragm is used for separating the first electrode layer from the second electrode layer.

Further, the electrolyte layer is coated on the flexible diaphragm.

Furthermore, a collector electrode layer is arranged on the flexible substrate, and tabs are formed on the collector electrode layer; wherein:

the collector layer is connected to at least one of the first electrode layers and/or the collector layer is connected to at least one of the second electrode layers.

Further, the first electrode layer comprises a first handle part and a plurality of first tooth parts, and the first tooth parts are arranged at intervals on one side of the first handle part facing the folding line; the second electrode layer comprises a second handle part and a plurality of second tooth parts, and the second tooth parts are arranged at intervals on one side, facing the folding line, of the second handle part;

when the flexible substrate is folded along the folding line, the first tooth parts are correspondingly inserted into gaps among the second tooth parts, and the second tooth parts are correspondingly inserted into gaps among the first tooth parts.

Further, a plurality of the first teeth are perpendicular to the fold line and a plurality of the second teeth are perpendicular to the fold line.

Furthermore, the folding electrode further comprises an insulating frame body, the insulating frame body is arranged on the flexible substrate, and the insulating frame body encloses the first electrode layer and/or the second electrode layer;

the insulating frame body is a hot melt adhesive frame, or the insulating frame body is a viscous adhesive frame.

Correspondingly, the utility model discloses still put forward a group battery, the group battery includes as aforementioned folding electrode.

Correspondingly, the utility model discloses still provide an use electrical apparatus, including as aforementioned group battery with electrical apparatus.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a folding electrode has taken the mode of folding printing on traditional sandwich structure film battery, predetermines the folding line on flexible substrate, with a plurality of opposite polarity's first electrode layer, second electrode layer printing on the folding line both sides on flexible substrate, so can finish first electrode layer, second electrode layer printing (first printing positive electrode, second printing negative electrode) through twice printing operation, and no matter how the number of series connection electrode increases, all need twice printing can finish first electrode layer, the whole printing of second electrode layer, the process has been saved greatly, efficiency is improved; and, the folded line set up position and first electrode layer, the printing position of second electrode layer all regards as unified benchmark with same flexible substrate, can guarantee the folded line, first electrode layer, the relative position accuracy between the second electrode layer three, based on this, only need follow the folded line fifty percent discount with flexible substrate, can make first electrode layer and corresponding second electrode layer accurate involution, the alignment coincide process of traditional sandwich structure film battery has been saved, make accurate first electrode layer after involuting, the second electrode layer can fully contact with the electrolysis layer simultaneously, fully react and reach good power supply effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic top view of a conventional sandwich-structured thin-film battery;

fig. 2 is a schematic perspective exploded view of a conventional thin film battery with a sandwich structure;

fig. 3 is a schematic top view of a first embodiment of the foldable electrode of the present invention;

fig. 4 is a schematic top view of a second embodiment of the foldable electrode of the present invention;

fig. 5 is a structural diagram illustrating a third embodiment of the foldable electrode according to the present invention in an unfolded state;

fig. 6 is a schematic structural view of a folded state of a third embodiment of the foldable electrode of the present invention;

fig. 7 is a schematic view of a third embodiment of the folded electrode of the present invention, which employs lateral interdigital electrodes.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1	A first flexible substrate	6	Flexible diaphragm
2	A second flexible substrate	7	Collector layer
				3	Flexible substrate	8	Insulating frame
4	A first electrode layer	31	Folding line
				5	A second electrode layer

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" and/or "appears throughout, the meaning includes three parallel schemes, for example," A and/or B "includes scheme A, or scheme B, or a scheme satisfying both schemes A and B. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 to 3, an embodiment of the present invention provides a folded electrode, which includes a flexible substrate 3, a plurality of first electrode layers 4, a plurality of second electrode layers 5, and an electrolyte layer (not shown in the drawings); wherein:

the plurality of first electrode layers 4 are arranged on one side surface of the flexible substrate 3 at intervals, the plurality of second electrode layers 5 are arranged on the same side surface of the flexible substrate 3 at intervals and are opposite to the plurality of first electrode layers 4 one by one, and each first electrode layer 4 is opposite to the opposite second electrode layer 5 in polarity; a folding line 31 is arranged on the flexible substrate 3, and the folding line 31 is positioned between the first electrode layer 4 and the second electrode layer 5; the electrolytic layer is arranged at any one or two of the first electrode layer 4 and the second electrode layer 5;

the flexible substrate 3 is folded in half along the folding line 31, so that each first electrode layer 4 is aligned with the corresponding second electrode layer 5, and the electrolyte layer is in contact with the first electrode layer 4 and the second electrode layer 5.

As shown in fig. 1 and fig. 2, a conventional sandwich-structured thin-film battery includes a first flexible substrate 1 and a second flexible substrate 2, and a first electrode layer 4 and a second electrode layer 5 are respectively fixed on the first flexible substrate 1 and the second flexible substrate 2 by printing or the like, where the first electrode layer 4 and the second electrode layer 5 may be provided in multiple numbers (for example, two as shown in fig. 1 and fig. 2), adjacent first electrode layers 4 have opposite polarities, and adjacent second electrode layers 5 have opposite polarities; the first flexible substrate 1 and the second flexible substrate 2 are overlapped after being aligned, so that the first electrode layers 4 and the second electrode layers 5 are oppositely arranged one by one (the first electrode layers 4 and the second electrode layers 5 can be separated through the flexible diaphragm 6, and the flexible diaphragm 6 is coated with electrolyte), the polarities of the oppositely arranged first electrode layers 4 and the second electrode layers 5 are opposite, and thus the traditional sandwich structure thin film battery is manufactured. During the use of the thin film battery, the active material in the corresponding electrode can react with the electrolyte on the flexible diaphragm 6 to generate current, and the current flows in the following direction as shown in fig. 1: the current is input from the first electrode layer 4 (positive electrode) on the left side (specifically, input through the collector layer 7), then flows to the second electrode layer 5 (negative electrode) on the left side, the second electrode layer 5 (positive electrode) on the right side, and the first electrode layer 4 (negative electrode) on the right side in sequence, and finally is output from the first electrode layer 4 (negative electrode) on the right side (specifically, output through the collector layer 7), wherein the second electrode layer 5 (negative electrode) on the left side and the second electrode layer 5 (positive electrode) on the right side can be connected through the collector layer 7. Thus, current circulation can be formed, and the purpose of supplying power to an external electrical appliance is achieved.

However, the conventional sandwich-structured thin-film battery has a complicated production process and a low efficiency, for example, when the first electrode layer 4 and the second electrode layer 5 are two as shown in fig. 1 and 2 (in this case, two strings of battery packs are formed), in the process of printing the electrodes, if only one kind of electrode is printed at a time, the electrodes are printed four times. And because the electrodes are printed separately, the reference is not uniform, and it is difficult to ensure that the first electrode layer 4 and the second electrode layer 5 respectively positioned on the first flexible substrate 1 and the second flexible substrate 2 can be accurately aligned when the laminating operation is performed.

Based on the above problem, as shown in fig. 3, in this embodiment, a folding line 31 is pre-arranged on the flexible substrate 3, and a plurality of first electrode layers 4 and second electrode layers 5 with opposite polarities are printed on two sides of the folding line 31 on the flexible substrate 3, so that the first electrode layers 4 and the second electrode layers 5 can be completely printed (a positive electrode is printed for the first time and a negative electrode is printed for the second time) on one side surface of the flexible substrate 3 by two printing operations, and no matter how the number of the electrodes is increased, the first electrode layers 4 and the second electrode layers 5 can be completely printed by only two times of printing, which greatly saves the processes and improves the efficiency; in addition, the position of the fold line 31 and the printing positions of the first electrode layer 4 and the second electrode layer 5 are all based on the same flexible substrate 3, so that the relative position accuracy between the three can be ensured. Based on the above arrangement, after the first electrode layer 4 and the second electrode layer 5 are printed on the original substrate, the original substrate is die-cut to obtain the flexible substrate 3 with a preset shape, and then the flexible substrate 3 is folded along the folding line 31, so that each first electrode layer 4 and the corresponding second electrode layer 5 are accurately aligned.

The electrolyte layer may be gel electrolyte or liquid electrolyte coated or stored on the first electrode layer 4 and the second electrode layer 5, and when the first electrode layer 4 and the second electrode layer 5 with opposite polarities are aligned, the electrolyte layer may simultaneously contact and react with active materials on the first electrode layer 4 and the second electrode layer 5 (such as nickel oxide and the like capable of reacting with alkaline electrolyte in an alkaline battery, and may also be other active materials capable of reacting with corresponding electrolyte in a lithium battery and a zinc battery, which may refer to the prior art, and are not described herein in detail) to generate electric energy, and the generated electric energy may be transmitted to an electrical appliance externally connected to the first electrode layer 4 and the second electrode layer 5, so as to implement the function of supplying power to an external electrical appliance by the thin film battery.

Therefore, in the embodiment, the folding printing mode is adopted on the traditional sandwich structure thin film battery, the folding line 31 is preset on the flexible substrate 3, the first electrode layer 4 and the second electrode layer 5 with opposite polarities are printed on two sides of the folding line 31 on the flexible substrate 3, so that the first electrode layer 4 and the second electrode layer 5 can be printed completely (a positive electrode is printed for the first time and a negative electrode is printed for the second time) through two printing operations, and the first electrode layer 4 and the second electrode layer 5 can be printed completely only by two times of printing no matter how the number of the serial electrodes is increased, so that the working procedures are greatly saved, and the efficiency is improved; and, the position and the first electrode layer 4 of setting of folding line 31, the printing position of second electrode layer 5 all regards same flexible substrate 3 as unified benchmark, can guarantee folding line 31, first electrode layer 4, the relative position accuracy between the 5 three of second electrode layer, based on this, only need to follow folding line 31 fifty percent discount with flexible substrate 3, can make first electrode layer 4 and corresponding second electrode layer 5 accurate involution, the alignment coincide process of traditional sandwich structure film battery has been saved, make accurate first electrode layer 4 after involution, second electrode layer 5 can fully contact with the electrolysis layer simultaneously, fully react and reach good power supply effect.

Further, referring to fig. 1 to 3, a collector layer 7 is further provided on the flexible substrate 3; wherein,

each first electrode layer 4 has a polarity opposite to that of the adjacent first electrode layer 4, and each second electrode layer 5 has a polarity opposite to that of the adjacent second electrode layer 5;

the collector layer 7 serves at least for connecting at least two adjacent first electrode layers 4 and/or the collector layer 7 serves at least for connecting at least two adjacent second electrode layers 5.

In the present embodiment, which shows a case where a plurality of electrodes are connected in series to form a battery pack, in the use process of the thin film battery, taking the two-string form shown in fig. 3 as an example, the flowing direction of the current is as follows: current is input from the left first electrode layer 4 (positive electrode) (specifically, input through the collector layer 7), then flows to the left second electrode layer 5 (negative electrode), the right second electrode layer 5 (positive electrode), and the right first electrode layer 4 (negative electrode) in this order, and is finally output from the right first electrode layer 4 (negative electrode) (specifically, output through the collector layer 7); the left second electrode layer 5 (negative electrode) and the right second electrode layer 5 (positive electrode) are electrically connected to each other through the collector layer 7.

In another embodiment, taking the three-string form shown in fig. 4 as an example, the current flows in the following directions: current is input from the first electrode layer 4 (positive electrode) on the left side (specifically, input through the collector layer 7), then flows to the second electrode layer 5 (negative electrode) on the left side, the second electrode layer 5 (positive electrode) in the middle, the first electrode layer 4 (negative electrode) in the middle, the first electrode layer 4 (positive electrode) on the right side, and the second electrode layer 5 (negative electrode) on the right side in sequence, and finally is output from the second electrode layer 5 (negative electrode) on the right side (specifically, output through the collector layer 7); the left second electrode layer 5 (negative electrode) and the middle second electrode layer 5 (positive electrode) are electrically connected by the collector layer 7, and the middle first electrode layer 4 (negative electrode) and the right first electrode layer 4 (positive electrode) are electrically connected by the collector layer 7.

It is understood that, in the specific implementation process, the number of the first electrode layer 4 and the second electrode layer 5 can be set according to the series connection requirement, and is not limited to the form shown in fig. 3 and fig. 4.

In addition, tabs (particularly, tabs located on the first and last electrodes of the battery pack formed by the electrode series connection) for externally connecting an external electrical appliance may be formed on the collector layer 7. It should be noted that, in the practical application process, after the flexible substrate 3 is folded in half along the folding line 31, the tab located at the first electrode layer 4 and the tab located at the second electrode layer 5 should be ensured not to contact with each other, so as to avoid short circuit.

Further, in an exemplary embodiment, a collector layer 7 is further disposed on the flexible substrate 3, and tabs are formed on the collector layer 7; wherein:

the collector layer 7 is connected to at least one first electrode layer 4 and/or the collector layer 7 is connected to at least one second electrode layer 5.

This embodiment shows a case where the first electrode layer 4 and the second electrode layer 5 on the flexible substrate 3 correspond to each other one by one to form a plurality of independent batteries (i.e. a plurality of electrodes are not connected in series, which is different from the case of the series battery pack of the previous embodiment), and at this time, the collector layer 7 is only used for externally connecting an external electrical appliance through the tabs thereon. It should be noted that, in the practical application process, after the flexible substrate 3 is folded in half along the folding line 31, the tab located at the first electrode layer 4 and the tab located at the second electrode layer 5 should be ensured not to contact with each other, so as to avoid short circuit.

Further, in an exemplary embodiment, the folded electrode further includes a flexible membrane 6 (not shown in fig. 3, but refer to the corresponding position in fig. 2), the flexible membrane 6 is disposed on the first electrode layer 4, and/or the flexible membrane 6 is disposed on the second electrode layer 5;

when the flexible substrate 3 is completely folded in half along the folding line 31, the flexible separator 6 serves to separate the first electrode layer 4 and the second electrode layer 5.

Specifically, the electrolyte layer is coated on the flexible diaphragm 6.

The flexible diaphragm 6 can be a porous diaphragm with strong imbibition wetting ability, the first electrode layer 4 and the second electrode layer 5 are separated by the flexible diaphragm 6, and short circuit caused by direct contact of the first electrode layer 4 and the second electrode layer 5 can be avoided; meanwhile, molecules with large volume can be prevented from passing through and only charged ions with small volume can be allowed to pass through by utilizing the semi-permeability and the liquid absorption wetting capacity of the flexible diaphragm 6, so that an electrolytic layer (specifically, electrolyte) can pass through the flexible diaphragm 6 and can be rapidly diffused to the first electrode layer 4 and the second electrode layer 5, the first electrode layer 4 and the second electrode layer 5 are in full contact with the electrolytic layer and fully react with the electrolytic layer, and the rate capability of the thin film battery is improved.

Specifically, referring to fig. 3, the folded electrode further includes an insulating frame 8, the insulating frame 8 is disposed on the flexible substrate 3, and the insulating frame 8 encloses the first electrode layer 4 and/or the second electrode layer 5;

wherein, insulating frame 8 is the hot melt adhesive frame, or insulating frame 8 is the viscidity frame of gluing.

The insulating frame 8 can surround the devices related to power generation on the thin film battery, such as the first electrode layer 4, the second electrode layer 5, the electrolyte layer, the flexible diaphragm 6, and the like, so as to prevent the related devices from being polluted by the outside, and also prevent the electrolyte layer (specifically, a gel-like or liquid electrolyte) from leaking or overflowing outwards.

In addition, when the insulating frame 8 is a hot melt adhesive frame, after the flexible substrate 3 is folded in half along the folding line 31, the insulating frame 8 can be hot pressed, so that the portions of the insulating frame 8 in contact with the two sides of the flexible substrate 3 are melted, and are adhered to the flexible substrate 3, so that the flexible substrate 3 is kept in a folded state; when the insulating frame 8 is an adhesive frame, the insulating frame 8 can be directly adhered to the two sides of the folded flexible substrate 3, so that the flexible substrate 3 is kept in the folded state.

Further, referring to fig. 5 and 6, in an exemplary embodiment, the first electrode layer 4 includes a first handle portion and a plurality of first tooth portions spaced apart from one side of the first handle portion facing the folding line 31; the second electrode layer 5 includes a second handle portion and a plurality of second tooth portions arranged at intervals on a side of the second handle portion facing the folding line 31;

when the flexible substrate 3 is folded along the folding line 31, the first teeth are correspondingly inserted into the gaps between the second teeth, and the second teeth are correspondingly inserted into the gaps between the first teeth.

Specifically, referring to fig. 5 and 6, the first plurality of teeth are perpendicular to the fold line 31 and the second plurality of teeth are perpendicular to the fold line 31.

In this embodiment, the first electrode layer 4 and the second electrode layer 5 are in an interdigital electrode structure shown in the figure, and the interdigital electrode structure enables the first electrode layer 4 and the second electrode layer 5 to be oppositely arranged and then not overlapped on a projection plane, so that the first electrode layer 4 and the second electrode layer 5 can be prevented from being in contact with each other and being short-circuited without the need of the flexible diaphragm 6 to separate the first electrode layer 4 from the second electrode layer 5. When the fingers are vertical as shown in the figure (i.e. the first tooth portions are perpendicular to the folding line 31, and the second tooth portions are perpendicular to the folding line 31), short circuit caused by the staggered contact of the first tooth portions and the second tooth portions in the vertical direction when the first electrode layer 4 and the second electrode layer 5 are aligned can be avoided. If the fingers are transversely arranged (i.e., the first teeth are parallel to the folding line 31, and the second teeth are parallel to the folding line 31), the first electrode layer 4 and the second electrode layer 5 may be misaligned when they are aligned, as shown in fig. 7.

Correspondingly, the embodiment of the utility model provides a still provide a group battery, this group battery includes the folding electrode in any above-mentioned embodiment.

In this embodiment, the battery pack may include a plurality of the above-described folded electrodes connected in series and other components used in cooperation. With regard to the specific structure of the folded electrode, reference is made to the above-described embodiments. Since the battery pack adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.

Correspondingly, the embodiment of the utility model provides an still provide an use electrical apparatus, should include the group battery in any embodiment above with electrical apparatus.

In this embodiment, with wearable equipment, terminal equipment etc. that can supply power for any accessible thin film battery, through with electrical apparatus and group battery butt joint, can transmit the electric energy that the group battery produced to this with electrical apparatus, realize the power supply.

It should be noted that the other contents of the foldable electrode, the battery pack and the electrical appliance disclosed in the present invention can be referred to in the prior art, and are not described herein again.

Above only be the utility model discloses an optional embodiment to not consequently restrict the utility model discloses a patent range, all be in the utility model discloses a under the design, utilize the equivalent structure transform of doing of the contents of description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims (10)

1. A folded electrode, comprising a flexible substrate, a plurality of first electrode layers, a plurality of second electrode layers, and an electrolyte layer; wherein:

the first electrode layers are arranged on one side surface of the flexible substrate at intervals, the second electrode layers are arranged on the same side surface of the flexible substrate at intervals and are opposite to the first electrode layers one by one, and each first electrode layer is opposite to the second electrode layer opposite to the first electrode layer in polarity; a folding line is arranged on the flexible substrate and is positioned between the first electrode layer and the second electrode layer; the electrolytic layer is arranged at any one or two of the first electrode layer and the second electrode layer;

the flexible substrate is used for being folded along the folding line so that each first electrode layer is opposite to the corresponding second electrode layer, and the electrolytic layer is in contact with the first electrode layer and the second electrode layer.

2. The folded electrode of claim 1, wherein a collector layer is further disposed on the flexible substrate; wherein,

each first electrode layer is opposite in polarity to the adjacent first electrode layer, and each second electrode layer is opposite in polarity to the adjacent second electrode layer;

the collector layer is at least used for connecting at least two adjacent first electrode layers, and/or the collector layer is at least used for connecting at least two adjacent second electrode layers.

3. The folded electrode of claim 1, further comprising a flexible membrane disposed on the first electrode layer and/or disposed on the second electrode layer;

when the flexible substrate is folded along the folding line, the flexible diaphragm is used for separating the first electrode layer from the second electrode layer.

4. The folded electrode of claim 3, wherein the electrolyte layer is coated on the flexible membrane.

5. The folded electrode of claim 1, wherein a collector layer is further disposed on the flexible substrate, and tabs are formed on the collector layer; wherein:

the collector layer is connected to at least one of the first electrode layers and/or the collector layer is connected to at least one of the second electrode layers.

6. The folded electrode of claim 1, wherein the first electrode layer comprises a first handle and a plurality of first teeth, the plurality of first teeth being spaced apart from the first handle on a side thereof facing the fold line; the second electrode layer comprises a second handle part and a plurality of second tooth parts, and the second tooth parts are arranged at intervals on one side, facing the folding line, of the second handle part;

when the flexible substrate is folded along the folding line, the first tooth parts are correspondingly inserted into gaps among the second tooth parts, and the second tooth parts are correspondingly inserted into gaps among the first tooth parts.

7. The folded electrode of claim 6, wherein a plurality of the first teeth are perpendicular to the fold line and a plurality of the second teeth are perpendicular to the fold line.

8. The folded electrode according to any one of claims 1 to 7, further comprising an insulating frame disposed on the flexible substrate, the insulating frame enclosing the first electrode layer and/or the second electrode layer;

the insulating frame body is a hot melt adhesive frame, or the insulating frame body is a viscous adhesive frame.

9. A battery comprising a folded electrode according to any one of claims 1 to 8.

10. An electrical consumer, characterized in that the electrical consumer comprises a battery pack as claimed in claim 9.

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