Laminated battery pole group, solid-state single battery, and electric device

Abstract

The application relates to the technical field of lithium ion batteries, in particular to a laminated battery pole group, a solid-state single battery and an electric device. The laminated battery pole group comprises an electrolyte layer and alternately arranged positive pole pieces and negative pole pieces; the positive pole piece comprises a positive current collector and a positive coating layer, the positive coating layer comprises a positive active material layer and two positive insulating layers, the positive active material layer is arranged at the middle part of the positive current collector, and the two positive insulating layers are arranged at the two side edges of the positive current collector; the negative pole piece comprises a negative current collector and a negative coating layer, the negative coating layer comprises a negative active material layer and two negative insulating layers, the negative active material layer is arranged at the middle part of the negative current collector, and the two negative insulating layers are arranged at the two side edges of the negative current collector; the size of the positive current collector and the negative current collector in a first direction is equal, and the size of the positive current collector and the negative current collector in a second direction is equal. The application solves the technical problems existing in the prior art solid-state battery.

Description

Technical Field

[0001] This application relates to the field of lithium-ion battery technology, and in particular to a stacked battery electrode assembly, a solid-state single cell battery, and an electrical device. Background Technology

[0002] Solid-state batteries use solid electrolytes instead of liquid electrolytes, which avoids safety issues caused by leakage and combustion of liquid electrolytes and reduces the risk of thermal runaway. In terms of energy density, they theoretically have higher energy density, potentially providing devices with longer battery life.

[0003] Current solid-state battery electrode designs exhibit redundancy, with the negative electrode edge being larger than the positive electrode edge. Furthermore, the separator edge is larger than the negative electrode edge, resulting in a length and width dimension that satisfy the inequality relationship of separator > negative electrode > positive electrode. However, because solid-state batteries operate under extremely high pressures, the negative electrode edge is prone to deformation or damage during the stacking of positive and negative electrodes. This redundancy significantly increases the risk of short circuits at the electrode edges.

[0004] To address these issues, the CN219513175U solution proposes a U-shaped frame design for solid-state batteries, where the positive and negative electrode plates are the same size and an insulating layer is provided on the U-shaped edges of both plates. However, this design is complex and cannot meet the requirements for rapid production of solid-state batteries, so it can only be used on small-scale pilot lines. Utility Model Content

[0005] The purpose of this application is to provide a stacked battery electrode assembly, a solid-state cell, and an electrical device, thereby solving the aforementioned technical problems existing in existing solid-state batteries.

[0006] According to a first aspect of this application, a stacked battery electrode assembly is provided, the stacked battery electrode assembly having two perpendicular directions: a first direction, a second direction, and a third direction. The stacked battery electrode assembly includes an electrolyte layer and positive and negative electrode sheets alternately arranged in the third direction. The electrolyte layer is disposed between the positive and negative electrode sheets. The positive electrode sheet includes a positive current collector and a positive coating. The positive current collector has the positive coating disposed on two opposing sides in the third direction. The positive coating includes a positive active material layer and two positive insulating layers. The positive active material layer is disposed in the middle of the positive current collector, and the two positive insulating layers are respectively disposed on the positive current collector. The negative electrode sheet comprises a negative current collector and a negative electrode coating. The negative current collector has the negative electrode coating on both opposite sides in the third direction. The negative electrode coating comprises a negative active material layer and two negative insulating layers. The negative active material layer is disposed in the middle of the negative current collector, and the two negative insulating layers are respectively disposed on the opposite sides of the negative current collector in the second direction. The size of the positive current collector in the first direction is equal to the size of the negative current collector in the first direction, and the size of the positive current collector in the second direction is equal to the size of the negative current collector in the second direction.

[0007] In any of the above technical solutions, further, the two positive electrode insulating layers have equal dimensions in the first direction; the dimension of each positive electrode insulating layer in the second direction is equal to the dimension of the positive electrode current collector in the second direction.

[0008] In any of the above technical solutions, further, the two negative electrode insulating layers have equal dimensions in the second direction; the dimension of each negative electrode insulating layer in the first direction is equal to the dimension of the negative electrode current collector in the first direction.

[0009] In any of the above technical solutions, the positive electrode sheet further satisfies: H12 / 100≤H11≤H12 / 2, H12 / 100≤H13≤H12 / 2; wherein, H11 is the dimension of one of the positive electrode insulating layers in the first direction, H13 is the dimension of the other positive electrode insulating layer in the first direction, and H12 is the dimension of the positive electrode active material layer in the first direction.

[0010] In any of the above technical solutions, the negative electrode sheet further satisfies: H22 / 100≤H21≤H22 / 2, H22 / 100≤H23≤H22 / 2; wherein, H21 is the dimension of one of the negative electrode insulating layers in the second direction, H23 is the dimension of the other negative electrode insulating layer in the second direction, and H22 is the dimension of the negative electrode active material layer in the second direction.

[0011] In any of the above technical solutions, the positive electrode sheet further satisfies: 0.1mm≤H11≤10mm, 0.1mm≤H13≤10mm; wherein, H11 is the dimension of one of the positive electrode insulating layers in the first direction, and H13 is the dimension of the other positive electrode insulating layer in the first direction.

[0012] In any of the above technical solutions, the negative electrode sheet further satisfies: 0.1mm≤H21≤10mm, 0.1mm≤H23≤10mm; wherein, H21 is the dimension of one of the negative electrode insulating layers in the second direction, and H23 is the dimension of the other negative electrode insulating layer in the second direction.

[0013] In any of the above technical solutions, the positive electrode further includes a positive electrode tab, which is connected to the positive current collector and disposed on one side of the positive current collector in the first direction; the negative electrode further includes a negative electrode tab, which is connected to the negative current collector and disposed on one side of the negative current collector in the second direction.

[0014] According to a second aspect of this application, a solid-state battery cell is provided, including the stacked battery electrode assembly as described above.

[0015] According to a third aspect of this application, an electrical device is provided, including a solid-state battery cell as described above.

[0016] The stacked battery electrode assembly of this application includes alternately arranged positive and negative electrode sheets. The positive electrode sheet includes a positive current collector and a positive coating. The positive current collector has a positive coating on each of its two opposite sides in a third direction. The positive coating includes a positive active material layer and two positive insulating layers. The positive active material layer is located in the middle of the positive current collector, and the two positive insulating layers are respectively located on opposite sides of the positive current collector in a first direction. The negative electrode sheet includes a negative current collector and a negative coating. The negative current collector has a negative coating on each of its two opposite sides in a third direction. The negative coating includes a negative active material layer and two negative insulating layers. The negative active material layer is located in the middle of the negative current collector, and the two negative insulating layers are respectively located on opposite sides of the negative current collector in a second direction. The dimensions of the positive current collector in the first direction are equal to those of the negative current collector in the first direction, and the dimensions of the positive current collector in the second direction are also equal to those of the negative current collector in the second direction.

[0017] Based on the above technical features, the beneficial effects of this application are as follows: The positive and negative electrode sheets in this application have the same structural dimensions. Due to the presence of the positive and negative insulating layers, a U-shaped insulating frame is formed around the stacked battery electrode assembly. This design avoids the risk of short circuits at the electrode edges caused by electrode redundancy, a feature not found in existing technologies. Furthermore, both the positive and negative electrode sheets in this application have insulating layers on their side edges, together forming a U-shaped insulating frame. This simplifies the manufacturing process compared to existing technologies. For example... Figure 1 As shown, the positive / negative electrode rolls extend laterally, the active material layer is located in the middle of the current collector, and both insulating layers extend laterally and are located on both sides of the current collector. In this way, the positive / negative electrode rolls can be obtained by cutting them vertically.

[0018] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram showing the unfolded positive / negative electrode rolls of an embodiment of this application is provided. Figure 2A schematic diagram of the structure of the positive electrode sheet according to an embodiment of this application is shown; Figure 3 A schematic diagram of the negative electrode sheet of an embodiment of this application is shown; Figure 4 A front view of a stacked battery electrode assembly according to an embodiment of this application is shown; Figure 5 A side view of a stacked battery electrode assembly according to an embodiment of this application is shown; Figure 6 A top view of a stacked battery electrode assembly according to an embodiment of this application is shown.

[0021] Icons: 10-Electrode roll; 20-Active material layer; 30-Current collector; 40-Insulating layer; 50-Taper connection area; 100-Positive electrode sheet; 110-Positive coating; 111-Positive active material layer; 112-Positive insulating layer; 120-Positive electrode tab; 130-Positive current collector; 200-Negative electrode sheet; 210-Negative coating; 211-Negative active material layer; 212-Negative insulating layer; 220-Negative electrode tab; 230-Negative current collector; 400-Electrolyte layer; X-First direction; Y-Second direction; Z-Third direction. Detailed Implementation

[0022] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0023] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0024] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0025] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0026] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0027] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0028] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0029] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0030] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0031] The first aspect of this application provides a stacked battery electrode assembly, thereby solving the aforementioned technical problems existing in existing solid-state batteries. (See below for reference.) Figures 1 to 6 This application describes a stacked battery electrode assembly according to some embodiments. For ease of description, the following description will introduce a first direction X, a second direction Y, and a third direction Z that are perpendicular to each other in the stacked battery electrode assembly. Here, the third direction Z refers to the thickness direction of the positive electrode 100 and the negative electrode 200.

[0032] like Figure 2 , Figure 3 and Figure 4 As shown, the stacked battery electrode assembly of this application includes a positive electrode 100 and a negative electrode 200 alternately arranged in the third direction Z. The positive electrode 100 includes a positive current collector 130 and a positive coating 110. The positive current collector 130 has the positive coating 110 on both opposite sides in the third direction Z. Figure 2 As shown, the positive electrode coating 110 includes a positive electrode active material layer 111 and two positive electrode insulating layers 112. The positive electrode active material layer 111 is disposed in the middle of the positive electrode current collector 130, and the two positive electrode insulating layers 112 are respectively disposed on the two opposite edges of the positive electrode current collector 130 in the first direction X. The negative electrode sheet 200 includes a negative electrode current collector 230 and a negative electrode coating 210. The negative electrode current collector 230 has a negative electrode coating 210 disposed on both opposite sides in the third direction Z. Figure 3As shown, the negative electrode coating 210 includes a negative electrode active material layer 211 and two negative electrode insulating layers 212. The negative electrode active material layer 211 is disposed in the middle of the negative electrode current collector 230, and the two negative electrode insulating layers 212 are respectively disposed on both opposite side edges of the negative electrode current collector 230 in the second direction Y. The size of the positive electrode current collector 130 in the first direction X is equal to the size of the negative electrode current collector 230 in the first direction X, and the size of the positive electrode current collector 130 in the second direction Y is equal to the size of the negative electrode current collector 230 in the second direction Y.

[0033] That is to say, the structural dimensions of the positive electrode plate 100 and the negative electrode plate 200 of the present application are the same. Due to the presence of the positive electrode insulating layer 112 and the negative electrode insulating layer 212, an "enclosed" insulating frame will be formed around the laminated battery electrode group. With such a setting, compared with the prior art, the risk of short circuit at the edge of the electrode plate caused by electrode plate redundancy can be avoided. Moreover, both the positive electrode plate 100 and the negative electrode plate 200 of the present application are provided with insulating layers on both side edges, and the two together form an "enclosed" insulating frame, which is simple in processing technology compared with the prior art. For example, as Figure 1 shown, the positive / negative electrode roll 10 extends in the transverse direction. The active material layer 20 is disposed in the middle of the current collector 30. The two insulating layers 40 both extend in the transverse direction and are disposed on both sides of the current collector 30. In this case, the positive / negative electrode roll 10 only needs to be cut vertically to obtain the positive / negative electrode plate 200.

[0034] Continue to refer to Figure 1 , the two side edges (the current collector areas without any coating) of the positive / negative electrode roll 10 are ear connection areas 50. The ear can be connected to the ear connection area 50 on one side, and then the redundant current collector 30 is cut to obtain the positive electrode plate 100 and the negative electrode plate 200 of the present application.

[0035] Specifically, as Figure 2 shown, the positive electrode plate 100 of the present application further includes a positive electrode ear 120. The positive electrode ear 120 is connected to the positive electrode current collector 130 and is disposed on one side of the positive electrode current collector 130 in the first direction X. As Figure 3 shown, the negative electrode plate 200 further includes a negative electrode ear 220. The negative electrode ear 220 is connected to the negative electrode current collector 230 and is disposed on one side of the negative electrode current collector 230 in the second direction Y. The positive electrode ear 120 extends in the first direction X, and the negative electrode ear 220 extends in the second direction Y. That is to say, as Figure 6As shown, the positive electrode tab 120 and the negative electrode tab 220 of the present application are arranged in an adjacent side manner, that is, the included angle between the length directions of the positive electrode tab 120 and the negative electrode tab 220 is 90°. With such an arrangement, the positive electrode plate 100 and the negative electrode plate 200 are stacked with an included angle of 90°, and the structural dimensions of the positive electrode plate 100 and the negative electrode plate 200 are the same. Also, due to the presence of the positive electrode insulating layer 112 and the negative electrode insulating layer 212, a "hui" - shaped insulating frame will be formed around the stacked battery electrode group, thus meeting the requirements of the stacking process.

[0036] As described above, the positive electrode plate 100 and the negative electrode plate 200 mentioned in the present application are both die - cut from the electrode roll 10. The positive electrode active material layer 111 and the negative electrode active material layer 211 are both formed by coating a mixture of active material, conductive agent, and binder on the surface of the positive electrode current collector 130 or the negative electrode current collector 230. The positive electrode insulating layer 112 and the negative electrode insulating layer 212 are both insulating materials, such as ceramic materials like boehmite, alumina, etc., mixed with a binder and coated on the surface of the positive electrode current collector 130 or the negative electrode current collector 230. The tab connection area 50 is the current collector area where no substance is coated. The positive electrode insulating layer 112 and the negative electrode insulating layer 212 can be introduced during the coating process, adapting to the existing process and enabling mass production.

[0037] In the embodiment of the present application, preferably, as Figure 2 shown, the sizes of the two positive electrode insulating layers 112 in the first direction X are equal, and the size of each positive electrode insulating layer 112 in the second direction Y is equal to the size of the positive electrode current collector 130 in the second direction Y. As Figure 3 shown, the sizes of the two negative electrode insulating layers 212 in the second direction Y are equal, and the size of each negative electrode insulating layer 212 in the first direction X is equal to the size of the negative electrode current collector 230 in the first direction X. With such an arrangement, the insulating layers with equal widths are convenient for process operations such as coating during the production of the electrode plates, which is beneficial to improving production efficiency and product consistency.

[0038] In the embodiment of the present application, preferably, as Figure 2As shown, the positive electrode 100 satisfies: H12 / 100≤H11≤H12 / 2, H12 / 100≤H13≤H12 / 2, L11=H21+H22+H23. Here, H11 is the dimension of one of the positive electrode insulating layers 112 in the first direction X, H13 is the dimension of the other positive electrode insulating layer 112 in the first direction X, H12 is the dimension of the positive electrode active material layer 111 in the first direction X, and L11 is the dimension of the positive electrode 100 in the second direction Y. With this configuration, if H11<H12 / 100, the coating process and the production process of the positive electrode 100 are more complex and difficult; if H11>H12 / 2, it will affect the energy density of the stacked battery electrode assembly. Similarly, if H13 < H12 / 100, the coating process and the production process of the positive electrode 100 are more complex and difficult; if H13 > H12 / 2, it will affect the energy density of the stacked battery electrode assembly.

[0039] See also Figure 2 The positive electrode 100 satisfies the following conditions: 0.1mm ≤ H11 ≤ 10mm, 0.1mm ≤ H13 ≤ 10mm. With this setting, if H11 < 0.1mm, the coating process and the manufacturing process of the positive electrode 100 are more complex and difficult; if H11 > 10mm, it will affect the energy density of the stacked battery electrode assembly. Similarly, if H13 < 0.1mm, the coating process and the manufacturing process of the positive electrode 100 are more complex and difficult; if H13 > 10mm, it will affect the energy density of the stacked battery electrode assembly.

[0040] In the embodiments of this application, preferably, such as Figure 3 As shown, the negative electrode 200 satisfies: H22 / 100≤H21≤H22 / 2, H22 / 100≤H23≤H22 / 2, L21=H11+H12+H13. Here, H21 is the dimension of one of the negative electrode insulating layers 212 in the second direction Y, H23 is the dimension of the other negative electrode insulating layer 212 in the second direction Y, H22 is the dimension of the negative electrode active material layer 211 in the second direction Y, and L21 is the dimension of the negative electrode 200 in the first direction X. With this configuration, if H21<H22 / 100, the coating process and the production process of the positive electrode 100 are more complex and difficult; if H21>H22 / 2, it will affect the energy density of the stacked battery electrode assembly. Similarly, if H23 < H22 / 100, the coating process and the production process of the positive electrode 100 are more complex and difficult; if H23 > H22 / 2, it will affect the energy density of the stacked battery electrode assembly.

[0041] See also Figure 3The negative electrode 200 satisfies the following conditions: 0.1mm ≤ H21 ≤ 10mm, 0.1mm ≤ H23 ≤ 10mm. With this setting, if H21 < 0.1mm, the coating process and the production process of the positive electrode 100 are more complex and difficult; if H21 > 10mm, it will affect the energy density of the stacked battery electrode assembly. Similarly, if H23 < 0.1mm, the coating process and the production process of the positive electrode 100 are more complex and difficult; if H23 > 10mm, it will affect the energy density of the stacked battery electrode assembly.

[0042] In the embodiments of this application, the widths of H11 and H21 can be set as needed, and their widths may be equal or unequal; no particular limitation is made here. Similarly, the widths of H13 and H23 can be set as needed, and their widths may be equal or unequal; no particular limitation is made here.

[0043] Furthermore, in the embodiments of this application, such as Figure 5 As shown, the stacked battery electrode assembly also includes an electrolyte layer 400, which is disposed between the positive electrode coating 110 and the negative electrode coating 210. This arrangement allows the electrolyte layer 400 to conduct lithium ions, providing a channel for their migration between the positive and negative electrodes, enabling the solid-state battery to perform charge and discharge reactions smoothly. Furthermore, the electrolyte layer 400, positioned between the positive electrode coating 110 and the negative electrode coating 210, effectively separates the positive electrode 100 and the negative electrode 200, preventing direct contact between them and potential short circuits, thus ensuring the safety of the solid-state battery.

[0044] In summary, the positive electrode 100 and negative electrode 200 of this application have the same structural dimensions. Furthermore, due to the presence of the positive electrode insulating layer 112 and the negative electrode insulating layer 212, a U-shaped insulating frame is formed around the stacked battery electrode assembly. This design avoids the risk of short circuits at the electrode edges caused by electrode redundancy, a feature not found in existing technologies. Moreover, both the positive electrode 100 and the negative electrode 200 of this application have insulating layers on their two side edges, together forming a U-shaped insulating frame. This simplifies the processing technology compared to existing technologies, further optimizes the yield of electrode assembly, and improves production efficiency.

[0045] According to a second aspect of this application, a solid-state battery cell is provided, including the stacked battery electrode assembly as described above.

[0046] According to a third aspect of this application, an electrical device is provided, including a solid-state battery cell as described above.

[0047] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the scope of the technology disclosed in this application, or make equivalent substitutions for some of the technical features. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application.

Claims

1. A stacked battery electrode assembly, characterized in that, The stacked battery electrode assembly has a first direction (X), a second direction (Y) and a third direction (Z) that are perpendicular to each other. The stacked battery electrode assembly includes an electrolyte layer (400) and positive electrode plates (100) and negative electrode plates (200) that are alternately arranged on the third direction (Z). The electrolyte layer (400) is disposed between the positive electrode plate (100) and the negative electrode plate (200). The positive electrode sheet (100) includes a positive current collector (130) and a positive coating (110). The positive current collector (130) has the positive coating (110) on two opposing sides in the third direction (Z). The positive coating (110) includes a positive active material layer (111) and two positive insulating layers (112). The positive active material layer (111) is disposed in the middle of the positive current collector (130), and the two positive insulating layers (112) are respectively disposed on the two opposing edges of the positive current collector (130) in the first direction (X). The negative electrode sheet (200) includes a negative electrode current collector (230) and a negative electrode coating (210). The negative electrode current collector (230) has the negative electrode coating (210) on two opposing sides in the third direction (Z). The negative electrode coating (210) includes a negative electrode active material layer (211) and two negative electrode insulating layers (212). The negative electrode active material layer (211) is disposed in the middle of the negative electrode current collector (230), and the two negative electrode insulating layers (212) are respectively disposed on the two opposing edges of the negative electrode current collector (230) in the second direction (Y). The size of the positive current collector (130) in the first direction (X) is equal to the size of the negative current collector (230) in the first direction (X), and the size of the positive current collector (130) in the second direction (Y) is equal to the size of the negative current collector (230) in the second direction (Y).

2. The stacked battery electrode assembly according to claim 1, characterized in that, The two positive electrode insulating layers (112) are equal in size in the first direction (X); The dimensions of each of the positive electrode insulating layers (112) in the second direction (Y) are equal to the dimensions of the positive electrode current collector (130) in the second direction (Y).

3. The stacked battery electrode assembly according to claim 1, characterized in that, The two negative electrode insulating layers (212) are equal in size in the second direction (Y); The dimensions of each of the negative electrode insulating layers (212) in the first direction (X) are equal to the dimensions of the negative electrode current collector (230) in the first direction (X).

4. The stacked battery electrode assembly according to claim 1, characterized in that, The positive electrode sheet (100) satisfies: H12 / 100≤H11≤H12 / 2, H12 / 100≤H13≤H12 / 2; wherein, H11 is the dimension of one of the positive electrode insulating layers (112) in the first direction (X), H13 is the dimension of the other positive electrode insulating layer (112) in the first direction (X), and H12 is the dimension of the positive electrode active material layer (111) in the first direction (X).

5. The stacked battery electrode assembly according to claim 1, characterized in that, The negative electrode sheet (200) satisfies: H22 / 100≤H21≤H22 / 2, H22 / 100≤H23≤H22 / 2; wherein, H21 is the dimension of one of the negative electrode insulating layers (212) in the second direction (Y), H23 is the dimension of the other negative electrode insulating layer (212) in the second direction (Y), and H22 is the dimension of the negative electrode active material layer (211) in the second direction (Y).

6. The stacked battery electrode assembly according to claim 1, characterized in that, The positive electrode sheet (100) satisfies: 0.1mm≤H11≤10mm, 0.1mm≤H13≤10mm; wherein, H11 is the size of one of the positive electrode insulating layers (112) in the first direction (X), and H13 is the size of the other positive electrode insulating layer (112) in the first direction (X).

7. The stacked battery electrode assembly according to claim 1, characterized in that, The negative electrode sheet (200) satisfies: 0.1mm≤H21≤10mm, 0.1mm≤H23≤10mm; wherein, H21 is the dimension of one of the negative electrode insulating layers (212) in the second direction (Y), and H23 is the dimension of the other negative electrode insulating layer (212) in the second direction (Y).

8. The stacked battery electrode assembly according to any one of claims 1-7, characterized in that, The positive electrode plate (100) further includes a positive electrode tab (120), which is connected to the positive current collector (130) and is disposed on one side of the positive current collector (130) in the first direction (X); The negative electrode plate (200) further includes a negative electrode tab (220), which is connected to the negative electrode current collector (230) and is disposed on one side of the negative electrode current collector (230) in the second direction (Y).

9. A solid-state single-cell battery, characterized in that, Includes the stacked battery electrode assembly as described in any one of claims 1-8.

10. An electrical appliance, characterized in that, Includes the solid-state battery cell as described in claim 9.

Images