Thin film multi-electrode structure and battery

Abstract

The utility model discloses a thin film multi-electrode structure and a battery, relates to the battery technical field, the thin film multi-electrode structure comprises a plurality of electrode main bodies and at least one collector electrode part, the plurality of electrode main bodies are arranged at intervals along a first direction, each electrode main body comprises a plurality of electrode layers which are laminated along a second direction, the collector electrode part is arranged between the two adjacent electrode main bodies, the collector electrode part extends along the second direction so as to be connected with the plurality of electrode layers of the two adjacent electrode main bodies, the first direction and the second direction are arranged orthogonally, and each electrode main body is printed with a plurality of electrode layers, so that the thickness of the electrode main bodies can be increased, and the thickness of the electrode main bodies can be increased; according to the electrode structure, the thickness of a single electrode layer can be reduced, meanwhile, electrons of the multiple electrode layers in the two adjacent electrode bodies can be conducted out through the collector electrode parts, the internal resistance of the two adjacent electrode bodies can be effectively reduced, and therefore the problem of how to reduce the resistance of the electrode structure with the multiple electrode layers is solved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a thin-film multi-electrode structure and a battery. Background Technology

[0002] Currently, battery electrodes can be formed through printing processes, such as in thin-film batteries. Due to the demands of different application scenarios, existing thin-film batteries have varying requirements for thickness and capacity. Specifically, battery capacity is related to the thickness of the printed electrodes; higher capacity requires thicker electrodes. However, the thickness that can be printed in a single pass is limited, and excessively thick electrodes can lead to a decrease in overall mechanical properties and a higher risk of material cracking, hindering the application of thin-film batteries in various scenarios. Utility Model Content

[0003] To address the aforementioned problems, the inventors designed a thin-film multi-electrode structure. This structure can reduce the thickness of individual electrode layers while increasing the overall thickness of the printed electrodes by printing multiple electrode layers. However, printing multiple electrode layers can easily lead to excessively high resistance in the electrode structure. Therefore, how to reduce the resistance of electrode structures with multiple electrode layers is a problem that urgently needs to be solved.

[0004] To achieve the above objectives, the present invention proposes a thin-film multi-electrode structure, comprising:

[0005] A plurality of electrode bodies are spaced apart along a first direction, and each electrode body includes a plurality of electrode layers stacked along a second direction; and

[0006] At least one collector portion is disposed between two adjacent electrode bodies, the collector portion extending along the second direction to connect with multiple electrode layers of the two adjacent electrode bodies;

[0007] The first direction and the second direction are orthogonal.

[0008] In one embodiment, the thin-film multi-electrode structure further includes a collector line extending along the first direction, the collector line being connected to the collector portion.

[0009] In one embodiment, the electrode body has two mounting sides in the second direction, and at least one of the mounting sides is provided with the current collector line; and / or,

[0010] The collector line is provided between two adjacent electrode layers.

[0011] In one embodiment, the plurality of electrode layers includes adjacent first electrode layers and second electrode layers;

[0012] The collector portion includes a first collector segment and a second collector segment. The first collector segment is located within the first electrode layer, and the second collector segment is located within the second electrode layer. The first collector segment and the second collector segment are spaced apart along the first direction.

[0013] In one embodiment, a collector line is provided between the first electrode layer and the second electrode layer, and the collector line is partially disconnected to form a plurality of third collector segments, each of the third collector segments being connected to the corresponding first collector segment and second collector segment.

[0014] In one embodiment, the electrode body has a first permeation portion in the middle and extends along the second direction.

[0015] In one embodiment, a plurality of the current collector portions extend through both sides of the electrode body along the first direction; and / or,

[0016] The plurality of collectors extend through both sides of the electrode body along a third direction, wherein the first direction, the second direction and the third direction are orthogonally arranged.

[0017] In one embodiment, the plurality of collector portions are arranged in an alternating manner to form a plurality of grids, each grid being a regular polygon, wherein the number of sides of each grid is n, n≥5.

[0018] In one embodiment, a second permeation portion is provided between two adjacent electrode bodies. One end of the permeation portion is connected to the current collector portion, and the other end is used to connect to the electrolytic layer. The material of the second permeation portion is a porous material.

[0019] Furthermore, this utility model also provides a battery comprising the aforementioned thin-film multi-electrode structure, wherein the battery comprises a thin-film battery, and the thin-film multi-electrode structure comprises:

[0020] A plurality of electrode bodies are spaced apart along a first direction, and each electrode body includes a plurality of electrode layers stacked along a second direction; and

[0021] At least one collector portion is disposed between two adjacent electrode bodies, the collector portion extending along the second direction to connect with multiple electrode layers of the two adjacent electrode bodies;

[0022] The first direction and the second direction are orthogonal.

[0023] In the technical solution of this utility model, each electrode body is printed with multiple electrode layers, which can both increase the thickness of the electrode body and reduce the thickness of a single electrode layer, thereby reducing the risk of cracking of the electrode body. At the same time, by setting the collector between two adjacent electrode bodies and connecting multiple electrode layers of the two adjacent electrode bodies, electrons in the multiple electrode layers of the two adjacent electrode bodies can be conducted out, which can effectively reduce the internal resistance of the two adjacent electrode bodies, thus solving the problem of how to reduce the resistance of an electrode structure with multiple electrode layers. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 A cross-sectional view of the first embodiment of the thin-film multi-electrode structure provided by this utility model;

[0026] Figure 2 A top view schematic diagram of the second embodiment of the thin-film multi-electrode structure provided by this utility model;

[0027] Figure 3 A cross-sectional view of the third embodiment of the thin-film multi-electrode structure provided by this utility model;

[0028] Figure 4 A cross-sectional view of the fourth embodiment of the thin-film multi-electrode structure provided by this utility model;

[0029] Figure 5 A top view schematic diagram of the fifth embodiment of the thin-film multi-electrode structure provided by this utility model;

[0030] Figure 6 This is a top view of the sixth embodiment of the thin-film multi-electrode structure provided by this utility model.

[0031] Explanation of icon numbers:

[0032] 100. Thin-film multi-electrode structure;

[0033] 1. Electrode body; 11. Electrode layer; 11a. First electrode layer; 11b. Second electrode layer; 111. Mounting side;

[0034] 2. Collector section; 21. First collector segment; 22. Second collector segment; 23. Third collector segment;

[0035] 3. Collector wire; 41. First permeation section; 42. Second permeation section; 5. Base layer; 6. Permeation layer.

[0036] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0038] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0039] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0040] Currently, battery electrodes can be formed through printing processes, such as in thin-film batteries. Due to the demands of different application scenarios, existing thin-film batteries have varying requirements for thickness and capacity. Specifically, battery capacity is related to the thickness of the printed electrodes; higher capacity requires thicker electrodes. However, the thickness that can be printed in a single pass is limited, and excessively thick electrodes can lead to a decrease in overall mechanical properties and a higher risk of material cracking, hindering the application of thin-film batteries in various scenarios.

[0041] To address the aforementioned problems, the inventors designed a thin-film multi-electrode structure. This structure can reduce the thickness of individual electrode layers while increasing the overall thickness of the printed electrode. However, printing multiple electrode layers can easily lead to excessively high resistance in the electrode structure. Therefore, how to reduce the resistance of an electrode structure with multiple electrode layers is a pressing issue. Based on this, this invention proposes an electrode structure aimed at solving the problem of reducing the resistance of an electrode structure with multiple electrode layers. Specifically, Figures 1 to 6 A schematic diagram of the electrode structure provided by this utility model.

[0042] Please see Figures 1 to 2 In one embodiment of the present invention, the thin-film multi-electrode structure 100 includes a plurality of electrode bodies 1 and at least one collector portion 2. The plurality of electrode bodies 1 are spaced apart along a first direction, and each electrode body 1 includes a plurality of electrode layers 11 stacked along a second direction. The collector portion 2 is disposed between two adjacent electrode bodies 1 and extends along the second direction to connect with the plurality of electrode layers 11 of the two adjacent electrode bodies 1. The first direction and the second direction are orthogonal.

[0043] It should be noted that the first direction and the second direction can be multiple, such as left and right, up and down, front and back, left and right, etc. This utility model does not limit them. For example, the first direction is left and right, and the second direction is up and down.

[0044] The number of electrode bodies 1 can vary, including two or three, and this invention does not limit this. Furthermore, multiple electrode bodies 1 are spaced apart along the first direction, creating gaps between adjacent electrode bodies 1. This allows the thin-film multi-electrode structure 100 to bend, reducing the risk of cracking. The number of electrode layers 11 in each electrode body 1 can vary, including two, three, four, or five, and can be adjusted according to the battery capacity. This invention does not limit this. Furthermore, the thin-film multi-electrode structure 100 also includes a base layer 5, with multiple electrode bodies 1 disposed on the same side of the base layer 5 to support the multiple electrode bodies 1.

[0045] The main function of the collector section 2 is to efficiently collect electrons and transfer them to an external circuit. It can be made of various materials, such as metals like aluminum and copper, or carbon-based materials like carbon and graphene; this invention does not limit this. Furthermore, the extension length of the collector section 2 is not limited; please refer to [reference needed]. Figure 1 Among the plurality of electrode layers 11, the uppermost electrode layer 11 is the first electrode layer 11a. The current collector 2 may extend upwards to the upper end of the first electrode layer 11a, or it may extend upwards to the lower end of the first electrode layer 11a, as long as it can connect the plurality of electrode layers 11. This invention does not limit this. That is, the current collector 2 may or may not be provided in the gap between the uppermost electrode layers 11 in two adjacent electrode bodies 1. This invention does not limit this.

[0046] In the technical solution of this utility model, each electrode body 1 is printed with multiple electrode layers 11, which can both increase the thickness of the electrode body 1 and reduce the thickness of a single electrode layer 11, thereby reducing the risk of cracking of the electrode body 1. At the same time, by setting the collector part 2 between two adjacent electrode bodies 1 and connecting multiple electrode layers 11 of the two adjacent electrode bodies 1, the electrons of the multiple electrode layers 11 in the two adjacent electrode bodies 1 can be conducted out, which can effectively reduce the internal resistance of the two adjacent electrode bodies 1, thus solving the problem of how to reduce the resistance of the electrode structure with multiple electrode layers 11.

[0047] In order to conduct electrons from the collector section 2 to the external circuit, in this embodiment, please refer to... Figures 2 to 4The thin-film multi-electrode structure 100 further includes a collector line 3 extending along the first direction, which connects to the collector portion 2. Thus, by providing the collector line 3, multiple collector portions 2 are simultaneously connected, allowing electrons from multiple collector portions 2 to be conducted to the outside. Of course, in other embodiments, each collector portion 2 may also be connected to an external circuit, and this invention does not limit this.

[0048] Furthermore, the collector line 3 can be positioned in various ways; in one embodiment, please refer to [reference needed]. Figure 3 and Figure 5 The electrode body 1 has two mounting sides 111 in the second direction, and at least one of the mounting sides 111 is provided with the collector line 3. Thus, by providing the collector line 3 on the mounting side 111 of the electrode body 1, it can simultaneously connect with multiple collector portions 2, allowing electrons from multiple collector portions 2 to be transferred to the outside of the thin film multi-electrode structure 100, thereby helping to reduce the overall resistance of the thin film multi-electrode structure 100.

[0049] It is understood that the fact that at least one of the mounting sides 111 is provided with the collector line 3 means that the collector line 3 can be one of the mounting sides 111 on which the electrode body 1 is disposed, or it can be two mounting sides 111 on which the electrode body 1 is disposed. This utility model does not limit this.

[0050] In another embodiment, a collector line 3 is provided between two adjacent electrode layers 11. This line can be connected to multiple collector portions 2 simultaneously, allowing electrons from the multiple collector portions 2 to be transferred to the outside of the thin-film multi-electrode structure 100. It can also be connected to two adjacent electrode layers 11 in the electrode body 1 simultaneously, allowing electrons from two adjacent electrode layers 11 to be transferred to the outside of the thin-film multi-electrode structure 100 through the collector line 3. This helps to reduce the overall resistance of the thin-film multi-electrode structure 100.

[0051] It should be noted that the above two related technical features, "at least one of the mounting sides 111 is provided with the collector line 3" and "the collector line 3 is provided between two adjacent electrode layers 11", can be provided either one or both, and this utility model does not limit them.

[0052] In one embodiment of this utility model, please refer to Figure 3 and Figure 4The plurality of electrode layers 11 include adjacent first electrode layers 11a and second electrode layers 11b. The collector portion 2 includes a first collector segment 21 and a second collector segment 22. The first collector segment 21 is located within the first electrode layer 11a, and the second collector segment 22 is located within the second electrode layer 11b. The first collector segment 21 and the second collector segment 22 are spaced apart along the first direction, so that the first collector segment 21 and the second collector segment 22 can be staggered to increase the contact range between two adjacent electrode bodies 1, thereby helping to reduce the resistance of the thin-film multi-electrode structure 100. Of course, in other embodiments, please refer to Figure 2 The first collector segment 21 and the second collector segment 22 can also be aligned and arranged accordingly, and this utility model does not limit this.

[0053] Further, please refer to Figure 4 A collector line 3 is provided between the first electrode layer 11a and the second electrode layer 11b. The collector line 3 is partially disconnected to form multiple third collector segments 23. Each third collector segment 23 connects to a corresponding first collector segment 21 and second collector segment 22. This disconnected arrangement of the collector line 3 allows for the formation of multiple third collector segments 23, facilitating the connection of the staggered first collector segments 21 and second collector segments 22. Furthermore, the spacing between adjacent third collector segments 23 reduces material usage, thereby helping to lower the cost of the thin-film multi-electrode structure 100. Of course, in other embodiments, the first collector segment 21 and the second collector segment 22 can also be connected via the collector line 3 disposed between the first electrode layer 11a and the second electrode layer 11b; this invention does not limit this to that.

[0054] In one embodiment of this utility model, referring to 4, a first permeation portion 41 is provided in the middle of the electrode body 1 and extends along the second direction. By providing the first permeation portion 41, the electrolyte can permeate into the interior of the electrode body 1 along the second direction, increasing the contact range between the electrode body 1 and the electrolyte, facilitating the reaction between the electrode body 1 and the electrolyte, thereby helping to improve battery performance. Furthermore, the first permeation portion 41 can be provided in various ways; it can extend in a straight line in the vertical direction or it can extend in a bent direction in the vertical direction. This utility model does not limit this. In addition, the extension length of the first permeation portion 41 can be varied. For example, the first permeation portion 41 can extend within one of the electrode layers 11 or it can extend to connect multiple electrode layers 11, etc. This utility model does not limit this.

[0055] It is understood that the first permeation section 41 is made of a porous material, allowing the electrolyte to permeate within it. Furthermore, there are various types of porous materials, such as porous fiber materials like wood or cotton, or porous polymer materials like polytetrafluoroethylene or polycarbonate; this invention does not limit the types of materials used.

[0056] In one embodiment of this utility model, please refer to Figure 3 The electrode body 1 has a permeable layer 6 on one side in the second direction. Thus, by providing the permeable layer 6, the electrolyte can permeate into the electrode body 1 along the second direction, thereby helping to improve battery performance. It is understood that when the thin-film multi-electrode structure 100 is applied to a battery, the permeable layer 6 is disposed on the side of the electrode body 1 near the electrolyte layer so that the electrolyte can permeate into the thin-film multi-electrode structure 100.

[0057] The current collector 2 can be arranged in various ways. In one embodiment, please refer to... Figure 5 The plurality of current collectors 2 extend through both sides of the electrode body 1 along the first direction, so that the plurality of current collectors 2 can space the plurality of electrode bodies 1, thereby reducing the stress on the individual electrode body 1 when the thin film multi-electrode structure 100 is bent along the second direction, reducing the risk of the electrode body 1 cracking, and thus helping to improve the mechanical properties of the thin film multi-electrode structure 100.

[0058] In another embodiment, a plurality of current collectors extend through both sides of the electrode body 1 along a third direction, wherein the first direction, the second direction, and the third direction are orthogonally arranged, so that the plurality of current collector portions 2 can space the plurality of electrode bodies 1, thereby reducing the stress on a single electrode body 1 when the thin-film multi-electrode structure 100 is bent along the first direction, reducing the risk of cracking of the electrode body 1, and thus helping to improve the mechanical properties of the thin-film multi-electrode structure 100.

[0059] It should be noted that the above two related technical features, "the plurality of collector portions 2 penetrate through both sides of the electrode body 1 along the first direction" and "the plurality of collectors penetrate through both sides of the electrode body 1 along the third direction", can be set either one or both. Obviously, setting both simultaneously is more effective.

[0060] In yet another embodiment, please refer to Figure 6The plurality of current collectors 2 are arranged in an alternating grid pattern, each grid being a regular polygon with n sides, where n ≥ 5. This grid arrangement of regular polygonal current collectors 2 allows the thin-film multi-electrode structure 100 to form a honeycomb structure. This strengthens the connection between the electrode bodies within the thin-film multi-electrode structure 100 and allows the structure to bend inwards or outwards, reducing the stress on individual electrode bodies 1 and lowering the risk of cracking. This improves the mechanical properties of the thin-film multi-electrode structure 100, enabling the battery to be mounted on spherical objects. It is understood that the regular polygon can be various, including pentagons and hexagons, and this invention does not limit this.

[0061] In one embodiment of this utility model, please refer to Figure 3 A second permeation section 42 is provided between two adjacent electrode bodies 1. One end of the second permeation section 42 is connected to the current collector 2, and the other end is used to connect to the electrolytic layer. The material of the second permeation section 42 is a porous material. In this way, by setting the permeation section 24, the electrolyte can permeate between two adjacent electrode bodies 1, which facilitates the reaction between the electrode body 1 and the electrolyte.

[0062] This utility model also proposes a battery comprising a thin-film multi-electrode structure 100. The specific structure of the thin-film multi-electrode structure 100 is as described in the above embodiments. Since this battery adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. The battery includes a thin-film battery. Further, the thin-film battery can be a square thin-film battery or a circular thin-film battery, etc., and this utility model does not limit it in this regard.

[0063] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A thin-film multi-electrode structure, characterized in that, include: A multi-electrode structure with multiple electrode bodies in thin film, spaced apart along a first direction, wherein each electrode body includes multiple electrode layers stacked along a second direction; as well as, At least one collector portion is disposed between two adjacent electrode bodies, the collector portion extending along the second direction to connect with multiple electrode layers of the two adjacent electrode bodies; The first direction and the second direction are orthogonal.

2. The thin-film multi-electrode structure as described in claim 1, characterized in that, The thin-film multi-electrode structure further includes a collector line extending along the first direction, the collector line being connected to the collector portion.

3. The thin-film multi-electrode structure as described in claim 2, characterized in that, The electrode body has two mounting sides in the second direction, and at least one of the mounting sides is provided with the current collector line; and / or, The collector line is provided between two adjacent electrode layers.

4. The thin-film multi-electrode structure as described in claim 1, characterized in that, The plurality of electrode layers includes adjacent first electrode layers and second electrode layers; The collector portion includes a first collector segment and a second collector segment. The first collector segment is disposed within the first electrode layer, and the second collector segment is disposed within the second electrode layer. The first collector segment and the second collector segment are spaced apart along the first direction.

5. The thin-film multi-electrode structure as described in claim 4, characterized in that, A collector line is provided between the first electrode layer and the second electrode layer. The collector line is partially disconnected to form a plurality of third collector segments. Each third collector segment is connected to the corresponding first collector segment and second collector segment.

6. The thin-film multi-electrode structure as described in claim 1, characterized in that, The electrode body has a first permeation portion in the middle and extends along the second direction.

7. The thin-film multi-electrode structure as described in claim 1, characterized in that, The plurality of said current collector portions extend through both sides of the electrode body along the first direction; and / or, The plurality of collectors extend through both sides of the electrode body along a third direction, wherein the first direction, the second direction and the third direction are orthogonally arranged.

8. The thin-film multi-electrode structure as described in claim 1, characterized in that, The plurality of collectors are arranged in an alternating grid pattern, each grid being a regular polygon, wherein the number of sides of each grid is n, n≥5.

9. The thin-film multi-electrode structure as described in claim 1, characterized in that, A second permeation section is provided between two adjacent electrode bodies. One end of the second permeation section is connected to the current collector, and the other end is used to connect to the electrolytic layer. The material of the second permeation section is a porous material.

10. A battery, characterized in that, The battery includes a thin-film multi-electrode structure as described in any one of claims 1 to 9, wherein the battery comprises a thin-film battery.

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