All-solid battery

Abstract

To provide an all-solid battery which can improve the energy density of a battery pack.SOLUTION: An all-solid battery 1 includes: a power generation element 10 including a positive electrode, a negative electrode, and a solid electrolyte layer between the positive electrode and the negative electrode; a pressurization member 30 for pressurizing the power generation element 10; and an external body 40 for storing the power generation element 10 and the pressurization member 30. The pressurization member 30 includes: a first plate-like member 31 for pressurizing a first end part 10a in a lamination direction of the power generation element 10; and a second plate-like member 35 for pressurizing a second end part 10b opposite to the first end part 10a in the lamination direction. A first joint part 314 of the first plate-like member 31 is joined to a second joint part 354 of the second plate-like member 35.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to all-solid-state batteries.

Background Art

[0002] A secondary battery includes a laminate battery and a sandwiching member that sandwiches the laminate battery (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above prior art, since a sandwiching member for pressing the laminate battery is required separately from the laminate battery, there is a problem that the energy density such as the volume energy density and the weight energy density decreases in the battery pack.

[0005] The problem to be solved by the present invention is to provide an all-solid-state battery capable of improving the energy density of a battery pack.

Means for Solving the Problems

[0006] In the present invention, a pressing member in which first and second plate-like members are joined is provided inside the exterior body of the all-solid-state battery, and the above problem is solved by pressing the power generation element with the pressing member.

Effects of the Invention

[0007] In the present invention, a pressing member in which first and second plate-like members are joined is provided inside the exterior body of the all-solid-state battery, and the power generation element is pressed by the pressing member. As a result, it is not necessary to separately mount a pressing mechanism for pressing the power generation element from the outside of the exterior body on the battery pack, so that the energy density of the battery pack can be improved.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0009] Hereinafter, the all-solid-state battery 1 according to the embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front cross-sectional view of the all-solid-state battery 1 in the present embodiment. FIG. 2 is a side cross-sectional view of the all-solid-state battery 1 in the present embodiment.

[0010] The all-solid-state battery 1 in the present embodiment is a battery cell. Although not particularly shown, a plurality of all-solid-state batteries 1 are electrically combined with each other to form a battery pack. This battery pack is not particularly limited, but is mounted on, for example, a vehicle or the like.

[0011] As shown in FIGS. 1 and 2, the all-solid-state battery 1 includes a power generation element 10, a positive electrode tab 20, a negative electrode tab 25, a pressing member 30, and an exterior body 40. The positive electrode tab 20 and the negative electrode tab 25 in the present embodiment correspond to an example of the "electrode tab" in the present invention.

[0012] The power generation element 10 is housed in the exterior body 40. This power generation element 10 is an electrode laminate including a positive electrode, a negative electrode, and a solid electrolyte layer interposed between the positive and negative electrodes. In this power generation element 10, the positive electrode, the solid electrolyte layer, and the negative electrode are laminated on each other along the Z direction in the figure. The power generation element 10 includes a plurality of laminates in which the positive electrode, the solid electrolyte layer, and the negative electrode are laminated, and the plurality of laminates are also laminated along the Z direction in the figure. Note that the Z direction in the present embodiment corresponds to an example of the "lamination direction" in the present invention. Also, the +Z direction in the present embodiment corresponds to an example of the "expansion direction of the power generation element" in the present invention, and the -Z direction in the present embodiment corresponds to an example of the "contraction direction of the power generation element" in the present invention.

[0013] Also, as shown in FIG. 2, the power generation element 10 includes a positive electrode current collector 11 electrically connected to the positive electrode and a negative electrode current collector 12 electrically connected to the negative electrode. The positive electrode tab 20 is connected to the positive electrode current collector 11, while the negative electrode tab 25 is connected to the negative electrode current collector 12. The positive and negative electrode tabs 20 and 25 extend from the power generation element 10 toward the outside of the exterior body 40. Note that the positive and negative electrode tabs 20 and 25 are not particularly limited, and for example, a metal plate such as a copper plate can be used.

[0014] As shown in FIGS. 1 and 2, the pressing member 30 is housed in the exterior body 40. This pressing member 30 presses and holds the power generation element 10. The pressing member 30 presses the first end portion (upper end) 10a of the power generation element 10 in the lamination direction and the second end portion 10b located on the side opposite to the first end portion 10a in the lamination direction, and sandwiches the power generation element 10 from above and below. Note that the pressure applied to the power generation element 10 by the pressing member 30 is not particularly limited, and may be 1 MPa to 10 MPa.

[0015] The pressing member 30 includes a first plate-like member 31, a first insulating portion 32, a second plate-like member 35, and a second insulating portion 36. Specifically, as will be described later, the first plate-like member 31 and the second plate-like member 35 have a spring structure capable of pressing the power generation element 10, and the power generation element 10 can be pressed by the restoring force of the spring structure according to the expansion and contraction of the power generation element 10. With this spring structure, the pressing member 30 can follow the expansion and contraction of the power generation element 10 while applying pressure to the power generation element 10.

[0016] Also, the first plate-like member 31 and the second plate-like member 35 do not contact the positive and negative electrodes of the power generation element 10. Thereby, insulation between the pressing member 30 and the positive and negative electrodes can be ensured.

[0017] The first plate-like member 31 is provided on the side of the first end portion 10a of the power generation element 10. This first plate-like member 31 is composed of a plate-like member formed into a shape convex in the -Z direction in the figure. The material constituting the first plate-like member 31 is not particularly limited as long as it can press the power generation element 10 with a desired pressure, and may be, for example, a metal material or a resin material.

[0018] This first plate-like member 31 includes a first opposing portion 311, a first curved portion 312, a first extending portion 313, a first joint portion 314, and a first separation portion 315.

[0019] The first opposing portion 311 is provided at the central portion of the first plate-like member 31, and applies a pressure along the -Z direction in the figure to the first end portion 10a of the power generation element 10 via the first insulating portion 32. In the present embodiment, the first opposing portion 311 covers the entire first end portion 10a via the first insulating portion 32.

[0020] The first opposing portion 311 includes a first convex portion 311a. The first convex portion 311a has a spring structure that curves so as to protrude toward the first end portion 10a. This first convex portion 311a is pressed in the +Z direction by the power generation element 10, and the amount of protrusion of the first convex portion 311a in the -Z direction in the all-solid-state battery 1 is smaller than the amount of protrusion of the first convex portion 311a in the natural state. Therefore, the power generation element 10 is applied with a pressure caused by the restoring force of the first convex portion 311a at its first end portion 10a. Note that the "natural state" in the present embodiment means a state in which no external force is applied to the spring structure.

[0021] Further, since the first convex portion 311a can press the first end portion 10a following the expansion and contraction of the power generation element 10, even if the expansion and contraction of the power generation element 10 occur, the power generation element 10 can be pressurized with a pressure within an appropriate range. Note that the first opposing portion 311 may not include the first convex portion 311a. In this case, the lower surface of the first opposing portion 311 is a plane substantially parallel to the upper surface of the power generation element 10.

[0022] A first curved portion 312 is provided around the first opposing portion 311. The first curved portion 312 in the present embodiment surrounds the entire circumference of the first opposing portion 311. This first curved portion 312 includes a curved surface that curves so as to protrude in a direction away from the power generation element 10 (the outer direction of the all-solid-state battery 1), and is stretchable along the Z direction in the figure.

[0023] In the present embodiment, as described above, since the first convex portion 311a is pressed in the +Z direction by the power generation element 10, the first curved portion 312 is maintained in a state of being slightly elongated along the +Z direction in the figure as compared with the first curved portion 312 in the natural state. For this reason, since a restoring force in the -Z direction in the figure acts on the first curved portion 312, the power generation element 10 is also applied with a pressure caused by the restoring force of the first curved portion 312 at its first end portion 10a.

[0024] In addition, similar to the first convex portion 311a, the first curved portion 312 can also follow the expansion and contraction of the power generation element 10. Therefore, when the power generation element 10 expands and contracts, the power generation element 10 can be pressurized at a pressure within an appropriate range.

[0025] Moreover, since the first curved portion 312 in the present embodiment protrudes in a direction away from the power generation element 10, it is possible to suppress the first curved portion 312 from coming into contact with the power generation element 10 due to vibration or the like. Note that the first curved portion 312 may protrude toward the power generation element 10. Also, the first plate-like member 31 may not include the first curved portion 312.

[0026] As shown in FIG. 1, a first extension portion 313 is provided at the lower end of the first curved portion 312. This first extension portion 313 includes a plane and is not curved like the above-described first convex portion 311a and first curved portion 312.

[0027] In the present embodiment, the length of the first extension portion 313 is slightly longer than the length of the first extension portion 313 in the natural state because the first convex portion 311a is pressed in the +Z direction by the power generation element 10, and the first extension portion 313 is extended by the amount of strain within the elastic region. Note that the elastic region is the range up to the yield of the material in the stress-strain curve. In this elastic region, when the stress applied to the first extension portion 313 is removed, the deformation (strain) of the first extension portion 313 disappears and the length of the first extension portion 313 returns to the natural length.

[0028] Since a restoring force in the -Z direction in the figure acts on the first extension portion 313 that is extended by the amount of strain within such an elastic region, the power generation element 10 is also applied with a pressure due to the restoring force caused by the extension of the first extension portion 313 at the first end portion 10a thereof. Note that the first extension portion 313 may not be extended.

[0029] Further, the first extension portion 313 in the present embodiment is inclined so as to move away from the power generation element 10 as it approaches the second plate-like member 35. As described above, the first convex portion 311a of the first extension portion 313 is pressed in the +Z direction by the power generation element 10, so that the inclination angle from the horizontal direction is larger than that of the first extension portion 313 in the natural state. Therefore, since the restoring force in the -Z direction in the figure acts on the first extension portion 313, the power generation element 10 is also applied with a pressure due to the restoring force caused by the inclination of the first extension portion 313 at its first end portion 10a. Further, since the first extension portion 313 is inclined outward as described above, it is possible to prevent the first extension portion 313 from coming into contact with the power generation element 10 due to vibration or the like.

[0030] In addition, since the inclination angle of the first extension portion 313 can change according to the expansion and contraction of the power generation element 10, when the power generation element 10 expands and contracts, the power generation element 10 can be pressurized with a pressure within an appropriate range. Note that the first extension portion 313 may be inclined so as to approach the power generation element 10 as it approaches the second plate-like member 35. Further, the first extension portion 313 may extend parallel to the stacking direction.

[0031] A first joint portion 314 is provided at the lower end of the first extension portion 313. This first joint portion 314 is located on the outer peripheral edge of the first plate-like member 31. The first joint portion 314 is joined to a second joint portion 354 located on the outer peripheral edge of the second plate-like member 35.

[0032] In the present embodiment, the first and second joint portions 314 and 354 are mechanically fastened by a fixing member 39. As the fixing member 39, for example, a screw or the like can be used. By mechanically fastening with the fixing member 39 in this way, the joining time of the first and second joint portions 314 and 354 can be shortened and the cost can be suppressed.

[0033] Also, the length of the fixing member 39 in the stacking direction is smaller than the length of the power generation element 10 in the stacking direction. In this way, since the length of the fixing member 39 is smaller than the length of the power generation element 10, the length of the pressing member 30 in the stacking direction can be made substantially equal to the length of the power generation element 10 in the stacking direction, so that an increase in the size of the all-solid-state battery 1 can be suppressed. Therefore, the energy density can be improved. Note that the first and second joints 314, 354 do not have to be joined by the fixing member 39, and may be joined by, for example, welding or the like.

[0034] As shown in FIG. 2, a first separation portion 315 is also provided at the lower end of the first curved portion 312. The first separation portion 315 is provided at the lower end of the first curved portion 312 so as to be adjacent to the first extension portion 313 (see FIG. 1). The first separation portion 315 is separated from the second plate-like member 35 and does not contact the second plate-like member 35. In this first separation portion 315, since the first plate-like member 31 and the second plate-like member 35 are not joined, a space through which the positive and negative electrode tabs 20, 25 pass is formed between the first plate-like member 31 and the second plate-like member 35. Such a first separation portion 315 can ensure electrical insulation between the positive and negative electrode tabs 20, 25 and the first plate-like member 31. In addition, the joint portion between the first plate-like member 31 and the second plate-like member 35 can be reduced.

[0035] As shown in FIGS. 1 and 2, the first insulating portion 32 is interposed between the first opposing portion 311 and the first end portion 10a. The first insulating portion 32 is made of a material having electrical insulating properties, and such a material is not particularly limited, and a resin material or the like can be used. The first insulating portion 32 electrically insulates the first plate-like member 31 and the power generation element 10. Therefore, a short circuit between the first plate-like member 31 and the power generation element 10 can be prevented.

[0036] The second plate-like member 35 is provided on the second end portion 10b side of the power generation element 10. This second plate-like member 35 has a shape obtained by inverting the first plate-like member 31 upside down. Therefore, the second plate-like member 35 is composed of a plate-like member formed into a shape convex in the +Z direction in the drawing. As the material for constituting the second plate-like member 35, the same material as that of the first plate-like member 31 may be used, or a material different from that of the first plate-like member 31 may be used.

[0037] This second plate-like member 35 includes a second opposing portion 351, a second curved portion 352, a second extending portion 353, a second joining portion 354, and a second separating portion 355.

[0038] The second opposing portion 351 is provided at the center of the second plate-like member 35, and applies a pressure along the +Z direction in the drawing to the second end portion 10b via the second insulating portion 36. The second opposing portion 351 in the present embodiment covers the entire second end portion 10b via the second insulating portion 36.

[0039] The second opposing portion 351 includes a second convex portion 351a. The second convex portion 351a has a spring structure curved so as to protrude toward the second end portion 10b, and this first convex portion 311a is pressed in the -Z direction by the power generation element 10. Therefore, similarly to the first end portion 10a, the power generation element 10 is applied with a pressure due to the restoring force of the second convex portion 351a at its second end portion 10b.

[0040] Similar to the first convex portion 311a, this second convex portion 351a can also press the first end portion 10a following the expansion and contraction of the power generation element 10. Therefore, even if the expansion and contraction of the power generation element 10 occur, the power generation element 10 can be pressurized with a pressure within an appropriate range. Note that the second opposing portion 351 does not necessarily need to include the second convex portion 351a. In this case, the upper surface of the second opposing portion 351 becomes a plane substantially parallel to the lower surface of the power generation element 10.

[0041] A second curved portion 352 is provided around the second opposing portion 351. The second curved portion 352 in the present embodiment surrounds the entire circumference of the second opposing portion 351. This second curved portion 352 includes a curved surface that curves so as to project in a direction away from the power generation element 10, and is stretchable along the Z direction in the figure.

[0042] In the present embodiment, the second curved portion 352 is maintained in a state slightly elongated along the -Z direction in the figure as compared with the second curved portion 352 in its natural state because the second convex portion 351a is pressed in the -Z direction by the power generation element 10. For this reason, the power generation element 10 is also subjected to a pressure caused by the restoring force of the second curved portion 352 at its second end portion 10b. Further, since the second curved portion 352 can also follow the expansion and contraction of the power generation element 10, when the expansion and contraction of the power generation element 10 occur, the power generation element 10 can be pressurized with a pressure within an appropriate range.

[0043] Also, since the second curved portion 352 in the present embodiment projects in a direction away from the power generation element 10, it is possible to suppress the second curved portion 352 from coming into contact with the power generation element 10 due to vibration or the like. Note that the second curved portion 352 may project toward the power generation element 10. Further, the second plate-like member 35 may not include the second curved portion 352.

[0044] As shown in FIG. 1, a second extension portion 353 is provided at the lower end of the second curved portion 352. This second extension portion 353 includes a plane and is not curved. The length of the second extension portion 353 in the present embodiment is slightly longer as compared with the length of the second extension portion 353 in its natural state because the second convex portion 351a is pressed in the -Z direction by the power generation element 10, and the second extension portion 353 is stretched by a strain amount within the elastic range.

[0045] Since the second extension part 353 that is stretched by the amount of strain within the elastic range causes a restoring force in the +Z direction in the figure, the power generation element 10 is also subjected to a pressure caused by the restoring force due to the stretching of the second extension part 353 at its second end 10b. Note that the second extension part 353 does not necessarily have to be stretched.

[0046] Also, the second extension part 353 in the present embodiment is inclined so as to move away from the power generation element 10 as it approaches the first plate-like member 31. And, since the second convex part 351a of this second extension part 353 is pressed in the -Z direction by the power generation element 10, it is maintained in a state where the inclination angle from the horizontal direction is larger compared to the second extension part 353 in the natural state. For this reason, the power generation element 10 is also subjected to a pressure caused by the restoring force due to the inclination of the first extension part 313 at its first end 10a. Further, since the second extension part 353 is inclined outward as described above, it is possible to suppress the second extension part 353 from coming into contact with the power generation element 10 due to vibration or the like.

[0047] Also, since the inclination angle of this second extension part 353 can change according to the expansion and contraction of the power generation element 10, when the expansion and contraction of the power generation element 10 occur, the power generation element 10 can be pressurized with a pressure within an appropriate range. Note that the second extension part 353 may be inclined so as to approach the power generation element 10 as it approaches the first plate-like member 31. Also, the second extension part 353 may extend parallel to the stacking direction.

[0048] A second joint part 354 is provided at the lower end of this second extension part 353. This second joint part 354 is located at the outer peripheral edge of the second plate-like member 35. The second joint part 354 is joined to the first joint part 314 as described above.

[0049] As shown in FIG. 2, a second separation portion 355 is provided at the lower end of the second curved portion 352. This second separation portion 355 is provided at the lower end of the second curved portion 352 so as to be adjacent to the second extension portion 353 (see FIG. 1). The second separation portion 355 is not joined to the first separation portion 315 as described above.

[0050] As shown in FIGS. 1 and 2, the second insulating portion 36 is interposed between the second opposing portion 351 and the second end portion 10b. This second insulating portion 36 may be made of the same material as the first insulating portion 32 or may be made of a material different from the first insulating portion 32. The second insulating portion 36 electrically insulates the second plate-like member 35 and the power generation element 10.

[0051] Here, an example of a method for assembling the pressure member 30 as described above will be described with reference to FIG. 3. FIG. 3(a) is a front cross-sectional view showing the pressure member 30 and the power generation element 10 before joining the first plate-like member 31 and the second plate-like member 35, and FIG. 3(b) is a front cross-sectional view showing the pressure member 30 and the power generation element 10 after joining the first plate-like member 31 and the second plate-like member 35.

[0052] As shown in FIG. 3(a), first, the first and second plate-like members 31 and 35 are prepared. The first and second plate-like members 31 and 35 can be prepared by molding a steel plate, a resin plate, or the like.

[0053] In FIG. 3(a), the first and second plate-like members 31 and 35 are in a natural state, and the heights H 1B , H 2B of the first and second plate-like members 31 and 35 at this time are smaller than half the height H3 / 2 of the height H3 of the power generation element 10 (H 1B < H3 / 2, H 2B < H3 / 2).

[0054] As shown in FIG. 3(b), next, the first joint portion 314 and the second joint portion 354 are joined. As described above, the heights H 1B , H 2BSince it is smaller than half of the height H3 of the power generation element 10, i.e., H3 / 2, by pulling the first joint portion 314 downward and the second joint portion 354 upward, the first and second joint portions 314, 354 are brought into contact. In this state, the first and second joint portions 314, 354 are mechanically fastened by the fixing member 39.

[0055] In this way, by joining the first and second joint portions 314, 354 in a state where the first joint portion 314 is pulled downward and the second joint portion 354 is pulled upward, the first and second convex portions 311a, 351a, the first and second curved portions 312, 352, and the first and second extension portions 313, 353 can apply the above-described restoring force to the power generation element 10.

[0056] Returning to FIGS. 1 and 2, the exterior body 40 houses the power generation element 10 and the pressing member 30. The exterior body 40 is not particularly limited, but can be manufactured by adhesively bonding the outer peripheries of two laminate films by thermocompression bonding or the like.

[0057] In the all-solid-state battery 1 according to the above-described embodiment, a pressing member 30 in which the first and second plate-like members 31, 35 are joined is provided inside the exterior body 40, and the power generation element 10 can be pressed by the pressing member 30. As a result, it is not necessary to separately mount a pressing mechanism for pressing the power generation element 10 from the outside of the exterior body 40 on the battery pack, so that the energy density of the battery pack can be improved.

[0058] Note that the above-described embodiment has been described to facilitate the understanding of the present invention, and is not described to limit the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

[0059] For example, as the spring structure, in the above embodiment, all of the first and second convex portions 311a and 351a, the first and second curved portions 312 and 352, and the first and second extension portions 313 and 353 are used, but it is not limited thereto. As long as an appropriate range of pressure can be applied to the power generation element 10, at least one of the above spring structures may be adopted.

Explanation of Signs

[0060] 1…All-solid battery 10…Power generation element 11…Positive electrode current collector 12…Negative electrode current collector 20…Positive electrode tab 25…Negative electrode tab 30…Pressing member 31…First plate-like member 311…First opposing portion 311a…First convex portion 312…First curved portion 313…First extension portion 314…First joint portion 315…First separation portion 32…First insulating portion 35…Second plate-like member 351…Second opposing portion 351a…Second convex portion 352…Second curved portion 353…Second extension portion 354…Second joint portion 355…Second separation portion 36…Second insulating portion 39…Fixing member 40…Outer package 41…First laminate film 42…Second laminate film 43…Adhesive

Claims

1. A power generation element including a positive electrode, a negative electrode, and a solid electrolyte layer interposed between the positive electrode and the negative electrode; A pressing member for pressing the power generation element; An exterior body housing the power generation element and the pressing member, wherein the pressing member includes a first plate-like member that presses a first end portion in the stacking direction of the power generation element, and a second plate-like member that presses a second end portion opposite to the first end portion in the stacking direction, and a part of the outer peripheral edge of the first plate-like member is joined to a part of the outer peripheral edge of the second plate-like member, the all-solid-state battery.

2. In the all-solid-state battery according to Claim 1, the first plate-like member and the second plate-like member have a spring structure capable of pressing the power generation element, and the first plate-like member and the second plate-like member press the power generation element by the restoring force of the spring structure according to the expansion and contraction of the power generation element, the all-solid-state battery.

3. In the all-solid-state battery according to Claim 2, the first plate-like member includes a first opposing portion facing the first end portion, the second plate-like member includes a second opposing portion facing the second end portion, the first opposing portion curves so as to protrude toward the first end portion and includes a first convex portion that presses the first end portion, and the second opposing portion curves so as to protrude toward the second end portion of the power generation element and includes a second convex portion that presses the second end portion, the all-solid-state battery.

4. In the all-solid-state battery according to Claim 2, the first plate-like member includes a first opposing portion facing the first end portion, a first joining portion located on the outer peripheral edge of the first plate-like member and joined to the outer peripheral edge of the second plate-like member, and a first extending portion located between the first opposing portion and the first joining portion and extending with a strain amount within the elastic range, and the second plate-like member includes a second opposing portion facing the second end portion, a second joining portion located on the outer peripheral edge of the second plate-like member and joined to the outer peripheral edge of the first plate-like member, and a second extending portion located between the second opposing portion and the second joining portion and extending with a strain amount within the elastic range, the all-solid-state battery.

5. In the all-solid-state battery according to Claim 4, the first and second extending portions apply a restoring force along the contraction direction of the power generation element to the power generation element, the all-solid-state battery.

6. In the all-solid-state battery according to Claim 4 or 5, The first and second extension parts are all-solid-state batteries that are inclined with respect to the power generation element. **Claim 7** In the all-solid-state battery according to claim 6, the first extension part is inclined so as to move away from the power generation element as it approaches the second plate-like member, and the second extension part is inclined so as to move away from the power generation element as it approaches the first plate-like member. An all-solid-state battery. **Claim 8** The all-solid-state battery according to claim 2, wherein the first plate-like member includes a first opposing part that opposes the first end part, a first joining part that is located at the outer peripheral edge of the first plate-like member and is joined to the outer peripheral edge of the second plate-like member, and a first curved part that is located between the first opposing part and the first joining part and has a curved surface. The second plate-like member includes a second opposing part that opposes the second end part, a second joining part that is located at the outer peripheral edge of the second plate-like member and is joined to the outer peripheral edge of the first plate-like member, and a second curved part that is located between the second opposing part and the second joining part and has a curved surface. An all-solid-state battery. **Claim 9** The all-solid-state battery according to claim 8, wherein the first and second curved parts are curved so as to protrude in a direction away from the power generation element. An all-solid-state battery. **Claim 10** The all-solid-state battery according to claim 1, wherein a part of the outer peripheral edge of the first plate-like member is mechanically fastened to a part of the outer peripheral edge of the second plate-like member. An all-solid-state battery. **Claim 11** The all-solid-state battery according to claim 1, wherein the all-solid-state battery further includes an electrode tab that is electrically connected to the power generation element and extends from the inside to the outside of the exterior body, the outer peripheral edge of the first plate-like member includes a first separation part that is separated from the outer peripheral edge of the second plate-like member, the outer peripheral edge of the second plate-like member is provided at a position corresponding to the first separation part and includes a second separation part that is separated from the outer peripheral edge of the first plate-like member, and the electrode tab passes through the space between the first separation part and the second separation part. An all-solid-state battery. **Claim 12** The all-solid-state battery according to claim 1, wherein the first plate-like member and the second plate-like member do not contact the positive electrode and the negative electrode. An all-solid-state battery. **Claim 13** The all-solid-state battery according to claim 1, wherein the pressing member includes a first insulating part that is interposed between the first plate-like member and the first end part and electrically insulates the first plate-like member and the power generation element. An all-solid-state battery including a second insulating portion interposed between the second plate-like member and the first end portion and electrically insulating the second plate-like member and the power generation element.

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