All-solid-state battery
By employing a double-layer solid electrolyte membrane structure in the all-solid-state battery and setting up a groove array to alleviate stress concentration, the problem of electrolyte layer fracture is solved, thereby improving lithium-ion transport efficiency and battery safety.
Patent Information
- Application Number
- CN202521938938.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-10
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2035-09-10
AI Technical Summary
During the winding process of all-solid-state batteries, the solid electrolyte layer is prone to breakage due to stress concentration, leading to a decrease in lithium-ion transport efficiency and safety hazards.
A double-layer solid electrolyte membrane structure is adopted. One layer has a groove array with the spacing of the groove array varying with the winding direction to alleviate stress concentration, while the other layer does not have grooves to optimize stress release.
It effectively avoids the breakage of the solid electrolyte membrane, improves lithium-ion transport efficiency, and enhances battery safety.
Smart Images
Figure CN223527212U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to lithium battery technical field especially relates to a kind of all-solid-state batteries. BACKGROUND
[0002] Winding process is a conventional lithium ion battery preparation process. But it has not been applied to the production of all-solid-state batteries. The existing cognition believes that the main reason is that the electrode sheet composed of ceramic solid-state electrolyte and positive active material in the composite positive electrode is relatively strong in rigidity and large in brittleness. The bending part is easily crushed and broken during winding, which may cause short circuit of the battery.
[0003] In the prior art, in the winding preparation process of the traditional liquid lithium ion battery, it is known to improve the positive electrode, such as adjusting the content or type of the adhesive in the bending part or setting a stress release structure in the bending part. However, the applicant found that for all-solid-state batteries, not only the problem of fracture in the bending area of the positive electrode needs to be solved, but also the problem of solid-state electrolyte film needs to be solved. Compared with the thickness of the positive electrode of about 100 microns, the thickness of the solid-state electrolyte film is one order of magnitude smaller than that of the positive electrode sheet, and the material system is more single, and the space for adjustment and control is smaller. On the other hand, the solid-state electrolyte film plays a role in isolating the positive and negative electrodes, and any defect on the film may cause internal short circuit of the battery. Therefore, for all-solid-state batteries, how to balance the stress release and safety of the solid-state electrolyte film during winding is very important. SUMMARY
[0004] The utility model aims at at least one of the technical problems existing in the prior art. To this end, the utility model provides an all-solid-state battery to solve the problem that the solid-state electrolyte layer in the current all-solid-state battery is prone to powdering or even breaking due to stress concentration in the bending area, resulting in a decrease in lithium ion transmission efficiency and safety problems.
[0005] Specifically, the utility model provides an all-solid-state battery, which comprises a wound battery cell, the wound battery cell comprises a positive electrode, a negative electrode and a solid-state electrolyte film, and the solid-state electrolyte film is wound into a roll along its length direction;
[0006] The solid-state electrolyte film has a double-layer structure, comprising a first solid-state electrolyte layer and a second solid-state electrolyte layer. When the wound battery cell is formed, the first solid-state electrolyte layer faces the center of the wound battery cell, and a plurality of groove arrays are arranged on the first solid-state electrolyte layer. No groove is arranged on the second solid-state electrolyte layer.
[0007] Along the length direction of the solid-state electrolyte film, the spacing between the plurality of groove arrays gradually increases, corresponding to each bending area of the solid-state electrolyte film.
[0008] The groove array comprises a plurality of grooves arranged along a width direction of the solid-state electrolyte film to form the groove array.
[0009] In one of the embodiments, the inner bottom of the groove is in a circular arc shape.
[0010] In one of the embodiments, the first solid-state electrolyte layer and the second solid-state electrolyte layer have the same thickness.
[0011] In one of the embodiments, the first solid-state electrolyte layer and the second solid-state electrolyte layer have different thicknesses; the thickness of the first solid-state electrolyte layer accounts for 20-80% of the total thickness of the solid-state electrolyte film structure.
[0012] In one of the embodiments, the plurality of grooves in the groove array are arranged in parallel.
[0013] In one of the embodiments in which the groove array is arranged along the width direction of the solid-state electrolyte film, the groove array comprises at least two grooves opened at edges of opposite sides of the solid-state electrolyte film along the width direction.
[0014] In one of the embodiments, the smaller the radius of curvature of the bending area, the more the number of grooves contained in the groove array or the smaller the spacing between adjacent grooves in the groove array.
[0015] In one of the embodiments, along the width direction of the solid-state electrolyte film, the ratio of the sum of the lengths of all grooves in the groove array in the direction to the width of the solid-state electrolyte film is 10-90%.
[0016] In one of the embodiments, the groove array is not arranged on the first solid-state electrolyte layer at the end of winding.
[0017] The above one or more embodiments of the utility model have at least one or more of the following beneficial effects:
[0018] The all-solid-state battery of the application solves the problem that the electrolyte film in the all-solid-state battery is prone to breakage at the bending part during winding by arranging a groove array on the first solid-state electrolyte layer close to the inner side of the battery and changing the spacing of the groove array along the winding direction of the battery, and the problem that the micro defects formed by arranging microstructures on the surface of the solid-state electrolyte film are prone to cause safety problems of the battery itself is also avoided due to the presence of the second solid-state electrolyte layer without grooves.
[0019] Additional aspects and advantages of the utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0020] The disclosure of the present application will become more readily understood from the following description of specific embodiments. As will be realized, these embodiments are only illustrative of the present application and are not intended to be limiting thereof. Like reference numerals refer to like elements throughout the various figures and embodiments.
[0021] Figure 1 is a front view of the solid-state electrolyte roll core after winding in the solid-state electrolyte membrane structure of the all-solid-state battery provided by one of the embodiments of the present application;
[0022] Figure 2 is a perspective view of the solid-state electrolyte roll core after winding in the solid-state electrolyte membrane structure of the all-solid-state battery provided by one of the embodiments of the present application;
[0023] Figure 3 is a schematic view of the solid-state electrolyte membrane structure of the all-solid-state battery provided by another embodiment of the present application;
[0024] Figure 4 is a schematic view of the solid-state electrolyte membrane structure of the all-solid-state battery provided by one of the embodiments of the present application.
[0025] BRIEF DESCRIPTION OF DRAWINGS
[0026] 1, solid-state electrolyte membrane; 11, bending area; 12, first solid-state electrolyte layer; 13, second solid-state electrolyte layer; 2, groove. DETAILED DESCRIPTION
[0027] Some embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art will understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application.
[0028] As described in the background, since the solid-state electrolyte has a high Young's modulus, when the solid-state electrolyte roll core is wound to form a solid-state electrolyte layer, the bending area is prone to powder falling and even breaking due to stress concentration, resulting in a dead zone in the lithium ion transmission of the bending area of the solid-state electrolyte layer, and a decrease in lithium ion transmission efficiency. In severe cases, local overheating occurs inside the battery due to uneven lithium ion transmission, causing thermal runaway.
[0029] To solve the above problems, the present application provides an all-solid-state battery to solve the problem of powder falling and even breaking of the solid-state electrolyte layer due to stress concentration in the bending area of the solid-state electrolyte layer in the current all-solid-state battery, resulting in a decrease in lithium ion transmission efficiency and safety.
[0030] The present application will be described in detail below through specific embodiments.
[0031] Specifically, the embodiment of the present application provides a kind of all-solid-state battery, including winding electric core, the winding electric core includes positive pole, negative pole and solid electrolyte film 1, refer to Figure 1 As shown in Figure 2 The solid electrolyte film 1 is wound into roll along its length direction.Referring to Figure 3 As shown in The solid electrolyte film 1 is double-layer structure, including first solid electrolyte layer 12 and second solid electrolyte layer 13, when forming the winding electric core, the first solid electrolyte layer 12 faces the center of the winding electric core, and a plurality of groove arrays are arranged on the first solid electrolyte layer 12;The second solid electrolyte layer 13 is not provided with groove.
[0032] Along the length direction of the solid electrolyte film 1, the spacing between a plurality of groove arrays gradually increases, corresponding to each bending area 11 of the solid electrolyte film 1 respectively.
[0033] The groove array includes a plurality of grooves 2, which are arranged along the width direction of the solid electrolyte film 1 to form the groove array.
[0034] Specifically, the length direction of the solid electrolyte film 1 refers to the direction of the longest length of the solid electrolyte film 1. The first solid electrolyte layer 12 is provided with the groove 2, and the second solid electrolyte layer 13 does not have the groove 2, which can reduce the bending stress of the solid electrolyte film 1 when winding, while improving the transmission of lithium ions.
[0035] The mouth of the groove 2 can be circular, triangular, rectangular, trapezoidal, pentagonal, hexagonal or other irregular shape, and the bottom surface of the groove 2 can be flat or have an arc. The cross section of the groove 2 perpendicular to the thickness direction of the solid electrolyte film 1 can be uniform or variable. In the length direction and width direction of the solid electrolyte film 1, the groove 2 can penetrate the edge of the solid electrolyte film 1 or not.
[0036] In some embodiments, referring to Figure 1 As shown in Figure 2 When the solid electrolyte film 1 is wound into roll along its length direction, the groove 2 is arranged on the surface of the solid electrolyte film 1 facing the center of the roll core formed by winding, because the closer to the center of the roll core, the smaller the bending area 11 curvature radius, the stress is more concentrated, and when the solid electrolyte film 1 is wound into roll along its length direction, the groove 2 faces the center of the roll core formed by winding the solid electrolyte film 1, and the structure after winding is more stable.
[0037] In some embodiments, referring to Figure 3As shown, the inner bottom of the groove 2 is circular arc-shaped. The circular arc-shaped inner bottom of the groove 2 can avoid new stress concentration points caused by sharp corners and can more evenly disperse stress. Preferably, the center of the circular arc-shaped inner bottom of the groove 2 is located in the groove 2, and the curvature of the inner bottom of the groove 2 is consistent with the curvature of the solid-state electrolyte membrane 1 wound, which can more evenly disperse stress.
[0038] The thickness of the first solid-state electrolyte layer 12 and the second solid-state electrolyte layer 13 can be the same or different. Preferably, the thickness of the first solid-state electrolyte layer and the second solid-state electrolyte layer is the same, which is convenient for manufacturing and stress calculation.
[0039] Preferably, the thickness of the first solid-state electrolyte layer and the second solid-state electrolyte layer is different; the thickness of the first solid-state electrolyte layer accounts for 20%-80% of the total thickness of the solid-state electrolyte membrane structure. Optionally, the thickness of the first solid-state electrolyte layer can account for 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, or any point value in the above range of the total thickness of the solid-state electrolyte membrane structure.
[0040] In some embodiments, the plurality of grooves in the groove array are arranged in parallel.
[0041] In some embodiments, the length of the groove 2 in the winding direction is 1-10 μm. Optionally, the length of the groove 2 in the width direction of the solid-state electrolyte membrane 1 can be 1 μm, 3 μm, 5 μm, 7 μm, 9 μm, 10 μm, or any point value in the above length range.
[0042] In some embodiments, the length of the groove 2 in the width direction of the solid-state electrolyte membrane 1 is the same as the width of the solid-state electrolyte membrane 1. That is, the groove 2 is arranged on the surface of the solid-state electrolyte membrane 1, which can relieve stress concentration of the solid-state electrolyte membrane 1 to the greatest extent when it is bent.
[0043] In some preferred embodiments, when the length of the groove 2 in the width direction of the solid-state electrolyte membrane 1 is the same as the width of the solid-state electrolyte membrane 1, the depth of the groove 2 accounts for 20%-50% of the thickness of the solid-state electrolyte membrane 1, which prevents the transmission of lithium ions from being affected.
[0044] In some preferred embodiments, a plurality of grooves 2 are arranged on the solid-state electrolyte film 1 along the winding direction, respectively, a first groove, a second groove,..., an (N-1)th groove, and an Nth groove, wherein N is the number of grooves 2, the distance between the first groove and the second groove is smaller than the distance between the (N-1)th groove and the Nth groove. The purpose of this is to ensure that the grooves 2 are always located in the bending area 11, and the distance can be adjusted according to actual conditions.
[0045] In some preferred embodiments, the lengths of the first groove, the second groove,..., the (N-1)th groove, and the Nth groove along the winding direction are the same.
[0046] In some preferred embodiments, the length of the first groove along the winding direction is greater than the length of the Nth groove in the direction.
[0047] In some embodiments, along the width direction of the solid-state electrolyte film 1, there is one groove 2, and the groove 2 extends along the width direction of the solid-state electrolyte film 1. The groove 2 extending along the width direction of the solid-state electrolyte film 1 means that the length of the groove 2 in the width direction of the solid-state electrolyte film 1 is greater than the length of the groove 2 in the length direction of the solid-state electrolyte film 1. The length of the groove 2 in the width direction of the solid-state electrolyte film 1 is 50%-99.9% of the width of the solid-state electrolyte film 1, which takes into account the mechanical strength requirement of the solid-state electrolyte film 1 and relieves the stress of the solid-state electrolyte film 1 when it is bent. The width direction of the solid-state electrolyte film 1 is perpendicular to the length direction of the solid-state electrolyte film 1.
[0048] In some embodiments, a groove array is arranged on the surface of the solid-state electrolyte film 1, and the groove array includes a plurality of grooves 2, and the grooves 2 are arranged along the width direction of the solid-state electrolyte film 1 to form the groove array.
[0049] In some preferred embodiments, the groove array includes at least two grooves 2 arranged on the edges of the solid-state electrolyte film 1 on opposite sides along the width direction, i.e., the long edges. When the solid-state electrolyte film 1 is wound along its length direction, the stress on the edges of the wound core is greater than the stress on the inner side. Therefore, the grooves 2 are arranged close to the edges along the width direction of the solid-state electrolyte film 1, and after the solid-state electrolyte film 1 is wound into a core along its length direction, the grooves 2 are located at the edges of the core, which can more effectively relieve the stress of the solid-state electrolyte film 1 wound into a core.
[0050] In some preferred embodiments, the curvature radius of the bending area 11 is smaller, and the more the number of grooves 2 included in the groove array.
[0051] In some preferred embodiments, the radius of curvature of the bending region 11 is smaller, and the spacing between adjacent grooves 2 in the groove array is smaller.
[0052] In some preferred embodiments, along the width direction of the solid electrolyte membrane 1, the ratio of the sum of the lengths of all grooves 2 in the groove array in that direction to the width of the solid electrolyte membrane 1 is 10%-90%. The closer to the starting end of the winding, the smaller the radius of curvature of the bending region 11, and the larger the ratio. Optionally, the ratio of the sum of the lengths of all grooves 2 in that direction to the width of the solid electrolyte membrane is 10%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 80%, 90%, or any value within the above range.
[0053] In some preferred embodiments, the grooves 2 or the groove array are not provided on the solid electrolyte membrane 1 at the end of the winding.
[0054] In some embodiments, refer to Figure 1 As shown, the solid electrolyte membrane 1 has a single-layer structure, and the depth of the groove 2 in the thickness direction of the solid electrolyte membrane 1 accounts for 20%-80% of the thickness of the solid electrolyte membrane 1. Optionally, the depth of the groove 2 in the thickness direction of the solid electrolyte membrane 1 can be 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, or any value within the above range. The depth of the groove 2 in the thickness direction of the solid electrolyte membrane 1, accounting for 20%-80% of the thickness of the solid electrolyte membrane 1, can effectively alleviate the stress in the bending area 11 while ensuring the mechanical strength of the solid electrolyte membrane 1, and at the same time prevent the groove 2 from penetrating the solid electrolyte membrane 1 and affecting the transport of lithium ions. The following will clearly and completely describe the concept and technical effects of the present invention in conjunction with embodiments, so as to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0055] Example 1: In this example, the solid electrolyte membrane in the all-solid-state battery has a double-layer structure, including a first solid electrolyte layer and a second solid electrolyte layer. The thickness of the first solid electrolyte layer accounts for 60% of the thickness of the solid electrolyte membrane. When forming the core, the first solid electrolyte layer faces the center of the core. A plurality of groove arrays are provided on the first solid electrolyte layer, with the spacing between the groove arrays gradually increasing, corresponding to the bending areas of the solid electrolyte membrane. Along the width direction of the solid electrolyte membrane, the groove array includes a first groove and a second groove located at the two side edges, and a third groove disposed between the first and second grooves. The cross-sections of the first, second, and third grooves along the thickness direction of the solid electrolyte membrane are all U-shaped, and the length of the third groove in the width direction of the solid electrolyte membrane is greater than the lengths of the first and second grooves in that direction. Specifically, the ratio of the length of the first and second grooves in that direction to the width of the solid electrolyte membrane is 12%, and the ratio of the length of the third groove in that direction to the width of the solid electrolyte membrane is 30%. The depth of the first, second, and third grooves in the thickness direction of the solid electrolyte membrane accounts for 80% of the thickness of the first solid electrolyte layer.
[0056] The number of grooves in each groove array and the spacing between the grooves are the same.
[0057] Specifically, in this embodiment, a first solid electrolyte layer and a second solid electrolyte layer are prepared respectively, and a groove array is formed on the surface of the first solid electrolyte layer away from the second solid electrolyte layer by roll forming.
[0058] Example 2: As Figure 3 As shown, in this embodiment, the solid electrolyte membrane 1 in the all-solid-state battery has a double-layer structure, including a first solid electrolyte layer 12 and a second solid electrolyte layer 13. The thickness of the first solid electrolyte layer 12 accounts for 70% of the thickness of the solid electrolyte membrane 1. When forming the core, the first solid electrolyte layer 12 faces the center of the core. Several grooves 2 are provided on the first solid electrolyte layer 12. The inner bottom of each groove 2 is arc-shaped. Each groove 2 is provided through the width direction of the solid electrolyte membrane 1, that is, the length of the groove 2 in this direction is the same as the width of the solid electrolyte membrane 1. The depth of the groove 2 in the thickness direction of the solid electrolyte membrane 1 accounts for 60% of the thickness of the solid electrolyte membrane 1. From the starting end of the winding to the ending end of the winding, they are respectively the first groove, the second groove, ..., the Nth groove. The depth of the first groove is greater than the depth of the Nth groove, and the width of the first groove in the winding direction is greater than the length of the Nth groove in this direction.
[0059] Example 3: In this example, the solid electrolyte membrane in the all-solid-state battery has a double-layer structure, including a first solid electrolyte layer and a second solid electrolyte layer. The thickness of the first solid electrolyte layer accounts for 60% of the thickness of the solid electrolyte membrane.
[0060] The first solid-state electrolyte layer comprises discontinuous solid-state electrolyte regions, and the gap between adjacent solid-state electrolyte regions is the groove.
[0061] Further, the first solid-state electrolyte layer is prepared on the surface of the prepared second solid-state electrolyte layer in an intermittent spraying manner.
[0062] Embodiment 4: The all-solid-state battery provided in the embodiment includes a positive electrode sheet, a negative electrode sheet, and a solid-state electrolyte film. The solid-state electrolyte film is arranged between the positive electrode sheet and the negative electrode sheet, and serves to insulate the positive electrode sheet and the negative electrode sheet from each other, prevent short circuit of the battery, and conduct lithium ions. The positive electrode sheet, the negative electrode sheet, and the solid-state electrolyte film are stacked and wound to form a roll core. The solid-state electrolyte film includes the solid-state electrolyte film as described in any one of the above embodiments 1-3.
[0063] The positive electrode sheet is provided with a groove in the bending region to relieve stress generated by winding. Specifically, the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. The groove is prepared on the positive electrode active material layer by laser processing. Of course, in some other embodiments, the groove can also be prepared by rolling.
[0064] The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. In the negative electrode sheet, a first negative electrode layer close to the negative electrode current collector is prepared by continuous coating, and a second negative electrode layer is arranged on a side of the first negative electrode layer away from the negative electrode current collector. The second negative electrode layer is prepared by intermittent coating. The gap between adjacent coating regions is the groove structure.
[0065] Embodiment 5: As shown in the embodiment, Figure 4 The solid-state electrolyte film 1 is a single-layer structure. A plurality of groove arrays are arranged on the solid-state electrolyte film 1. Along the length direction of the solid-state electrolyte film 1, the first groove array is close to the winding starting end, and the Nth groove array is close to the winding end. The curvature radius of each bending region 11 increases from the winding starting end to the winding end.
[0066] The first groove array includes four grooves 2, which are arranged in parallel along the width direction of the solid-state electrolyte film 1 and have equal sizes. The inner bottom of each groove 2 is in a circular arc shape. The depth of each groove 2 accounts for 50% of the thickness of the solid-state electrolyte film 1. The Nth groove array includes three grooves 2. The spacing between the grooves 2 in the Nth groove array is greater than that in the first groove array. Along the width direction of the solid-state electrolyte film 1, the ratio of the sum of the lengths of all the grooves 2 in the first groove array in the direction to the width of the solid-state electrolyte film 1 is 67%, and the ratio of the sum of the lengths of all the grooves 2 in the Nth groove array in the direction to the width of the solid-state electrolyte film 1 is 50%.
[0067] Specifically, in the present embodiment, the groove 2 is formed by laser processing.
[0068] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0069] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.
[0070] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.
Claims
1. A full solid-state battery comprising a wound cell including a positive electrode, a negative electrode, and a solid electrolyte film, characterized by, The solid-state electrolyte film is wound into a roll along a length direction thereof; The solid-state electrolyte film has a double-layer structure comprising a first solid-state electrolyte layer and a second solid-state electrolyte layer, the first solid-state electrolyte layer faces the center of the wound battery cell when the wound battery cell is formed, and a plurality of groove arrays are arranged on the first solid-state electrolyte layer; no groove is arranged on the second solid-state electrolyte layer; Along the length direction of the solid-state electrolyte film, the spacing between the plurality of groove arrays gradually increases, respectively corresponding to each bending area of the solid-state electrolyte film; The groove array comprises a plurality of grooves arranged along the width direction of the solid-state electrolyte film to form the groove array.
2. The all-solid battery according to claim 1, characterized by, The inner bottom of the groove is a circular arc.
3. The all-solid battery according to claim 1 or 2, characterized by, The thickness of the first solid-state electrolyte layer is the same as that of the second solid-state electrolyte layer.
4. The all-solid battery according to claim 1 or 2, characterized by, The thickness of the first solid-state electrolyte layer is different from that of the second solid-state electrolyte layer; the thickness of the first solid-state electrolyte layer accounts for 20%-80% of the total thickness of the solid-state electrolyte film.
5. The all-solid battery according to claim 1 or 2, characterized by, The plurality of grooves in the groove array are arranged in parallel.
6. The all-solid battery according to claim 1, characterized by, The groove array comprises at least two grooves arranged on the edges of the opposite sides of the solid-state electrolyte film along the width direction.
7. The all-solid battery according to claim 1, characterized by, The smaller the curvature radius of the bending area is, the more the number of grooves contained in the groove array is, or the smaller the spacing between adjacent grooves in the groove array is.
8. The all-solid battery according to claim 1, characterized by, Along the width direction of the solid-state electrolyte film, the ratio of the sum of the lengths of all grooves in the groove array in the direction to the width of the solid-state electrolyte film is 10%-90%.
9. The all-solid battery according to claim 1, characterized by, At the winding end, no groove array is arranged on the first solid-state electrolyte layer.