JP5353435B2 - All solid battery - Google Patents

Description

  The present invention provides an all-solid-state device including a power generation element having a solid electrolyte body, a battery case that accommodates the power generation element, and an electrode terminal member that is electrically connected to the power generation element and extends from the inside of the battery case to the outside. In particular, the present invention relates to an all solid state battery in which a battery case is formed of an exterior material composed of a plurality of layers.

  Conventionally, a power generation element having a solid electrolyte body, a battery case formed of a multi-layer exterior material, and an electrode terminal member electrically connected to the power generation element and extending from the inside of the battery case to the outside An all-solid battery is known. All-solid batteries have the advantages of higher safety and easier miniaturization than liquid batteries. In addition, liquid batteries can be operated at high temperatures above 60 ° C, which is difficult to achieve, so they can be installed in an engine room that tends to be in a high temperature environment when installed in a hybrid car or an electric vehicle. It becomes possible.

Related arts related to this include the batteries disclosed in Patent Documents 1 and 2.
In the battery disclosed in Patent Document 1 (specifically, a liquid battery), an exterior material forming a battery case includes an inner resin layer located in the innermost layer, and a metal layer located outside the inner resin layer. And a plurality of outer resin layers positioned outside the metal layer (refer to FIG. 4 of Patent Document 1 and the description thereof). Each layer constituting the exterior material is arranged up to the periphery of the exterior material. That is, the inner resin layer, the metal layer, and the plurality of outer resin layers are laminated on the periphery of the exterior material. And the peripheral part of the inner side resin layer which is the innermost layer is joined by heat sealing | fusion, the peripheral parts of an exterior material are joined, and the battery case is sealed. Further, an insulating film is interposed between the peripheral portions of the electrode terminal member and the exterior material that sandwiches the electrode terminal member (see FIG. 5 of Patent Document 1 and its description).

Further, in the battery (specifically, all solid state battery) disclosed in FIG. 5A of Patent Document 2, the exterior material forming the battery case includes a paper layer positioned in the inner layer, and an outer side of the paper layer. And a metal layer located on the surface.
Further, in the battery (specifically, an all solid battery) disclosed in FIG. 5B of Patent Document 2, the outer packaging material that forms the battery case includes an inner paper layer positioned at the innermost layer, and the inner paper. It consists of a metal layer located outside the layer and an outer paper layer located outside the metal layer.
Furthermore, in the battery (specifically, all-solid battery) disclosed in FIG. 6 and the like of Patent Document 2, an exterior material that forms a battery case includes an inner resin layer located in the innermost layer and an outer side of the inner resin layer. An inner paper layer positioned outside the inner paper layer, an outer paper layer positioned outside the metal layer, and an outer resin layer positioned outside the outer paper layer.

However, even in these batteries of Patent Document 2, as in the battery of Patent Document 1, all the layers constituting the exterior material are arranged up to the periphery of the exterior material. For this reason, in the battery using the exterior material shown in FIG. 5A or 5B of Patent Document 2, the inner layer (innermost layer) paper layers are joined to each other, so that the periphery of the exterior material The parts are joined to each other, and the battery case is sealed. On the other hand, in the battery using the exterior material shown in FIG. 6 of Patent Document 2, as in the battery of Patent Document 1, the inner resin layers of the innermost layers are joined together by thermal fusion, The peripheral parts are joined together to seal the battery case.
In each battery described in Patent Document 2, the electrode terminal member is directly sandwiched between the peripheral portions of the exterior material without using an insulating film as in Patent Document 1.

JP 2007-335309 A JP 2000-195538 A

  However, in the battery described in Patent Document 1 and the battery described in FIG. 6 of Patent Document 2, and the like, the exterior material constituting the battery case has a resin layer. The load loss due to is likely to occur. Then, battery performance deteriorates. On the other hand, in the battery described in FIG. 5A and FIG. 5B of Patent Document 2, the peripheral portions of the exterior material are joined to each other by joining the paper layers of the exterior material. For this reason, it is difficult to ensure sufficient sealing performance. That is, in the conventional battery, the sealing performance of the battery case (sealing performance between the peripheral portions of the exterior material) is sufficiently improved, and the deterioration of the battery performance due to the loss of the restraining load is prevented when the battery is pressed and restrained. It was difficult.

  The present invention has been made in view of the current situation, and in an all-solid battery having a battery case made of a multi-layer exterior material, the sealing performance of the battery case can be sufficiently improved, An object of the present invention is to provide an all-solid-state battery capable of preventing deterioration of battery performance due to loss of restraint load when the battery is pressurized and restrained.

The solution includes a power generation element having a solid electrolyte body, a battery case containing the power generation element and made of an exterior material having a plurality of layers, the peripheral portions of which are overlapped and joined to each other, and the power generation An all-solid-state battery comprising an electrode terminal member electrically connected to an element and extending from the inside of the battery case to the outside through the peripheral portions of the exterior material, and constituting the battery case The exterior material is located in the innermost layer, and includes a paper layer made of paper, and a metal layer located in an outer layer than the paper layer and made of metal. Of the metal layers, the exterior material The metal peripheral edge located at the peripheral edge includes an outer metal peripheral edge located outside the paper peripheral edge located at the peripheral edge of the exterior material in the paper layer, and at least the metal peripheral edge. The outer metal peripheral edges of each other, By sealing by bonding on top of one another without passing through the serial paper periphery, it joined the peripheral edge portions of the outer member, the electrode terminal member, said outer metal via an insulating sealing material It is an all-solid-state battery formed by being sandwiched between the peripheral portions of the exterior material while being insulated from the peripheral portion.

Since the battery according to the present invention is an all-solid battery having a solid electrolyte body, as described above, it is safer and easier to miniaturize than a liquid battery, and can be used at high temperatures. . And in this invention, since the metal layer is contained in the exterior material which comprises a battery case, it can prevent reliably a water | moisture content etc. permeate | transmitting into the inside of a battery from the battery outside.
In addition, since the exterior material has a paper layer, load loss due to creep is less likely to occur when an all-solid battery is pressed and restrained as compared with an exterior material having a resin layer. Accordingly, it is possible to prevent a decrease in battery performance due to the loss of the restraining load. In addition, the paper layer has the advantage of being easy to recycle at a lower cost than the resin layer.
In the liquid battery, if the innermost layer of the exterior material is a paper layer, the paper layer may absorb the electrolyte and expand, leading to deterioration of battery performance. However, since the all-solid-state battery of the present invention uses the solid electrolyte as described above, the battery performance is not deteriorated even if the innermost layer of the exterior material is a paper layer.

Furthermore, in the present invention, while the innermost layer of the exterior material is a paper layer, the metal peripheral edge located on the peripheral edge of the metal layer, which is the outer layer, is further in the radial direction than the paper peripheral edge located on the peripheral edge of the paper layer. An outer metal peripheral edge located on the outer side is provided. Then, at least the outer metal peripheral edges are joined to each other without interposing the paper peripheral edge, thereby joining the peripheral edges of the exterior material. For this reason, the sealing performance of the battery case (the sealing performance between the peripheral portions of the exterior material) can be sufficiently improved.
In addition, since the electrode terminal member is sandwiched between the peripheral portions of the exterior material in a state of being electrically insulated from the peripheral portion of the outer metal through the insulating sealing material, the peripheral portion of the electrode terminal member and the external material It is possible to ensure insulation from the (outer metal peripheral edge).

  "Paper" is produced by agglomerating plant fibers and other fibers. Other than those produced by dispersing plant fibers in water, spreading them on a cocoon or net, dehydrating and drying them. Also included are those using metals and synthetic fibers as raw materials, and those produced by dry methods that do not use water. As the “paper” forming the paper layer of the exterior material, it is desirable to use aramid paper, ceramic fiber paper, glass fiber paper, etc. in consideration of high heat resistance and electrical insulation.

Moreover, although the joining form between "outer metal peripheral parts" can be changed as appropriate, for example, an adhesive sheet is disposed between the outer metal peripheral parts, and the outer metal peripheral parts are joined by heat sealing, For example, an adhesive may be applied to the outer metal peripheral edge and the outer metal peripheral edges may be joined to each other. For the material of the adhesive sheet or adhesive, for example, a high heat resistant resin such as a fluorine-based resin can be used.
Examples of the “insulating sealing material” include an adhesive sheet and an adhesive. Further, as the material of the “insulating sealing material”, for example, a high heat resistant resin such as a fluorine-based resin can be used.

  In addition, when the all-solid battery of the present invention is a sulfide-based solid battery, in consideration of the possibility that hydrogen sulfide gas is generated, a gas adsorbing gas is interposed between the paper layer and the metal layer of the exterior material. It is desirable to interpose an activated carbon sheet or the like. Alternatively, activated carbon coating can be applied to the outside (metal layer side) of the paper layer.

  Furthermore, in the above all solid state battery, the paper layer may be an all solid state battery made of paper having heat resistance of 200 ° C. or higher.

  In the all solid state battery of the present invention, since the paper layer is made of paper having high heat resistance as described above, even when this all solid state battery is used in a high temperature atmosphere of, for example, 100 ° C. or more, the heat resistance of the battery case. And sufficient durability and weather resistance. In particular, the innermost layer of the exterior material tends to be high temperature in contact with the power generation element, but in the present invention, since the innermost layer of the exterior material is a paper layer, the heat resistance and durability of the battery case, The weather resistance can be sufficiently improved.

It is a disassembled perspective view of the all-solid-state battery which concerns on embodiment. It is explanatory drawing which shows a mode that the paper was shape | molded in the predetermined shape regarding the manufacturing method of the all-solid-state battery which concerns on embodiment. It is explanatory drawing which shows a mode that the metal foil was shape | molded by the predetermined shape regarding the manufacturing method of the all-solid-state battery which concerns on embodiment. It is explanatory drawing which shows a mode that the paper material shape | molded by the predetermined shape and the metal material were piled up regarding the manufacturing method of the all-solid-state battery which concerns on embodiment. Regarding the manufacturing method of the all-solid-state battery according to the embodiment, the electrode terminal member of the first outer metal peripheral portion of the first metal peripheral portion of the first metal material is the first paper material and the first metal material stacked on each other. It is explanatory drawing which shows a mode that the insulating adhesive agent was apply | coated to the contact part and its circumference | surroundings. Regarding the method for manufacturing an all-solid-state battery according to the embodiment, the second paper material and the second metal material stacked on each other have an insulating property on substantially the entire second outer metal peripheral edge of the second metal peripheral edge of the second metal material. It is explanatory drawing which shows a mode that the adhesive agent was apply | coated. About the manufacturing method of the all-solid-state battery which concerns on embodiment, a mode that a 1st paper material and a 1st metal material, a 2nd paper material, and a 2nd metal material are joined, accommodating the electric power generation element to which the electrode terminal member was connected. It is explanatory drawing which shows.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an all-solid battery 100 according to the first embodiment. This all-solid-state battery 100 is a battery mounted in vehicles, such as a hybrid car and an electric vehicle, and battery use apparatuses, such as a hammer drill. The all-solid-state battery 100 includes a battery case 110, a power generation element 120 accommodated in the battery case 110, and a pair of electrode terminal members 130 and 130 that are connected to the power generation element 120 and extend to the outside of the battery case 110. It is composed of

  Among these, the battery case 110 is formed of an exterior material 111 having a plurality of layers (two layers in the present embodiment). That is, the battery case 110 is configured by surrounding the power generation element 120 with the exterior material 111 and overlapping and joining the peripheral edge portions 111f of the exterior material 111 to each other. The exterior material 111 is located in the inner layer, and is composed of a paper material (paper layer) 113 made of paper, and a metal material (metal layer) 117 made of metal and located in the outer layer of the paper material 113.

  The paper material 113 is made of paper having heat resistance of 200 ° C. or higher (in this embodiment, aramid paper). This paper material 113 has a rectangular shape in plan view having a first concave portion 114h having a rectangular shape in plan view, and a second concave shape 115h having a rectangular shape in plan view. It is comprised from the 2nd paper material 115 of planar view rectangular shape in the center of self. Of the first paper material 114, the paper peripheral edge portion 114 f positioned around the peripheral edge portion 111 f of the exterior material 111, that is, the first paper peripheral edge portion 114 f surrounding the first concave portion 114 h is long over the entire circumference. The length (width) A is 5 mm. Similarly, among the second paper material 115, the paper peripheral portion located at the peripheral portion 111f of the exterior material 111, that is, the second paper peripheral portion 115f having a square shape surrounding the second concave portion 115h is also disposed on the entire periphery. The length (width) B is 5 mm.

The first paper material 114 and the second paper material 115 form a rectangular parallelepiped space by the first recess 114h and the second recess 115h in a state where the battery case 110 is sealed, and a power generation element described later in the space. 120 is housed.
Further, in this state, the first paper peripheral edge portion 114f and the second paper peripheral edge portion 115f directly overlap each other, and a part on the outer side in the radial direction is an insulating adhesive (insulating sealing material) 140 described later (FIG. 5). To FIG. 7).
In addition, a pair of electrode terminal members 130 and 130, which will be described later, are sandwiched between the first paper peripheral edge portion 114f and the second paper peripheral edge portion 115f, and extend between the inside and the outside of the paper material 113 through these gaps. I'm out.

The metal material 117 is made of aluminum in this embodiment. This metal material 117 has the same shape as the first metal member 118 having a rectangular shape in plan view and a third concave portion 118h having a rectangular shape in plan view, and the fourth recess 119h having a rectangular shape in plan view. It is comprised from the 2nd metal material 119 of the planar view rectangular shape in the center of self.
The third and fourth recesses 118h and 119h of the first and second metal materials 118 and 119 are formed slightly larger than the first and second recesses 114h and 115h of the first and second paper materials 114 and 115, respectively. ing. Accordingly, the first recess 114h is accommodated in the third recess 118h in a state where the first paper material 114 and the first metal material 118 are overlapped. Further, the second recess 115h is housed in the fourth recess 119h in a state where the second paper material 115 and the second metal material 119 are overlapped.

  Of the first metal material 118, the metal peripheral edge located at the peripheral edge 111 f of the exterior material 111, that is, the first metal peripheral edge 118 f in the shape of a letter that surrounds the third recess 118 h, is long over the entire circumference. The length (width) C is 15 mm, which is larger than the length (width) A of the first paper peripheral edge 114 f of the first paper material 114. Similarly, of the second metal material 119, the metal peripheral portion located at the peripheral portion 111f of the exterior material 111, that is, the second metal peripheral portion 119f having a square shape surrounding the fourth concave portion 119h is also disposed on the entire periphery. Its length (width) D is 15 mm, and is larger than the length (width) B of the second paper peripheral edge 115 f of the second paper material 115.

  That is, the first metal peripheral portion 118f of the first metal material 118 is in a state in which the battery case 110 is sealed (a state in which the first paper material 114 and the first metal material 118 are overlapped with each other). The first outer peripheral metal edge 118fb is located further radially outward than the first paper peripheral edge 114f. In addition, the second metal peripheral edge portion 119f of the second metal material 119 is in a state in which the battery case 110 is sealed (the second paper material 115 and the second metal material 119 are stacked on each other). And a second outer metal peripheral edge portion 119fb positioned further radially outward than the second paper peripheral edge portion 115f.

  The first metal material 118 and the second metal material 119 form a rectangular parallelepiped space by the third recess portion 118h and the fourth recess portion 119h in a state in which the battery case 110 is sealed. The element 120 and the first and second recesses 114h and 115h of the first and second paper materials 114 and 115 surrounding the element 120 are accommodated.

Further, in this state, the first metal peripheral edge 118f and the second metal peripheral edge 119f overlap each other, and a part thereof is joined to each other by an insulating adhesive 140 (see FIGS. 5 to 7) described later. . Specifically, among the first metal peripheral edge portion 118f, the first inner metal peripheral edge portion 118fa located on the radial inner side of the first outer metal peripheral edge portion 118fb and the second metal peripheral edge portion 119f among the first metal peripheral edge portion 118fb. The second inner metal peripheral edge 119fa positioned on the radially inner side of the second outer metal peripheral edge 119fb indirectly overlaps with the first and second paper peripheral edges 114f and 115f. On the other hand, the first outer metal peripheral edge 118fb of the first metal peripheral edge 118f and the second outer metal peripheral edge 119fb of the second metal peripheral edge 119f are the first and second paper peripheral edges 114f and 115f. They are directly overlapped without being interposed, and are joined to each other by the insulating adhesive 140.
Thus, the peripheral portions 111f of the exterior material 111 are joined and sealed together, and the battery case 110 is configured by the exterior material 111.

In addition, a pair of electrode terminal members 130 and 130, which will be described later, are sandwiched between the first metal peripheral edge portion 118f and the second metal peripheral edge portion 119f, and extend from the inside of the metal material 117 to the outside through the gap therebetween. I'm out.
Specifically, in the first and second metal peripheral edge portions 118f and 119f, the first and second inner metal peripheral edge portions 118fa and 119fa that indirectly overlap through the first and second paper peripheral edge portions 114f and 115f, As described above, the electrode terminal members 130 and 130 are sandwiched between the first paper peripheral portion 114f and the second paper peripheral portion 115f, respectively.

  On the other hand, of the first and second metal peripheral portions 118f and 119f, the first and second outer metal peripheral portions 118fb and 119fb that directly overlap without passing through the first and second paper peripheral portions 114f and 115f are electrode terminals. The members 130 and 130 are electrically insulated from the first and second outer metal peripheral edges 118fb and 119fb via the insulating adhesive 140 (see FIGS. 5 and 7), and are first and second. It is sandwiched between the outer metal peripheral edges 118fb and 119fb.

  Next, the power generation element 120 will be described. The power generation element 120 has a rectangular parallelepiped shape. In the power generation element 120, a positive electrode layer 121 having a rectangular shape in plan view and a negative electrode layer 123 having a rectangular shape in plan view are stacked on each other via a solid electrolyte body 125 having a rectangular shape in plan view. It is constituted by. The positive electrode layers 121, 121,... Are electrically connected to each other at a part of the peripheral portion, and the negative electrode layers 123, 123,. Has been. The power generation element 120 is housed in the battery case 110 as described above. In FIG. 1, the detailed structure of the power generation element 120 is omitted.

  The electrode terminal members 130 and 130 are made of metal and have an elongated strip shape. One of the two electrode terminal members 130, 130 is electrically connected to the positive electrode layer 121 of the power generation element 120, and the other is electrically connected to the negative electrode layer 123 of the power generation element 120. As shown in FIG. 1, these electrode terminal members 130, 130 protrude from the power generation element 120 in opposite directions. As described above, the electrode terminal members 130 and 130 are electrically insulated from the peripheral portion 111f through the space between the peripheral portions 111f of the exterior material 111 constituting the battery case 110, as described above. 110 extends from the inside to the outside.

  As described above, since the battery 100 of the present embodiment is an all-solid battery having the solid electrolyte body 125, it is safer and easier to miniaturize than a liquid battery, and is used at a high temperature. Is possible. And in this embodiment, since the metal material 117 is contained in the exterior material 111 which comprises the battery case 110, it can prevent reliably that a water | moisture content etc. permeate | transmit into the inside of a battery from the battery outside.

In addition, since the exterior material 111 includes the paper material 113, the all-solid-state battery 100 is restrained by pressurizing using the restraining members KB1 and KB2 (see FIG. 1) as compared with the exterior material having the resin layer. , It is difficult for load loss to occur due to creep. Accordingly, it is possible to prevent a decrease in battery performance due to the loss of the restraining load. Further, the paper material 113 has an advantage that it is easy to recycle at a low cost as compared with the case where a resin material is used instead.
In the liquid battery, when the inner layer of the exterior material 111 is the paper material 113, the paper material 113 may absorb the electrolyte and expand, leading to deterioration of battery performance. However, since the all-solid-state battery 100 of this embodiment uses the solid electrolyte body 125, the battery performance is not deteriorated even though the inner layer of the exterior material 111 is the paper material 113.

  Further, in the present embodiment, while the inner layer of the exterior material 111 is the paper material 113, the metal peripheral portion (first and second metal members 118, 119) located on the peripheral edge of the outer metal layer 117 (first and second metal members 118, 119). In the second metal peripheral edge portions 118f and 119f), than the paper peripheral edge portions (first and second paper peripheral edge portions 114f and 115f) positioned at the peripheral edge of the paper material 113 (first and second paper materials 114 and 115), Further, an outer metal peripheral edge located on the radially outer side is provided. Then, the outer metal peripheral edge portions (first and second outer metal peripheral edge portions 118fb and 119fb) are overlapped and joined to each other without passing through the paper peripheral edge portion (first and second paper peripheral edge portions 114f and 115f). Thus, the peripheral portions 111f of the exterior material 111 are joined to each other. For this reason, the sealing performance of the battery case 110 (the sealing performance between the peripheral portions 111f of the exterior material 111) can be sufficiently improved.

  Moreover, the electrode terminal members 130 and 130 are electrically insulated from the outer metal peripheral edge portions (first and second outer metal peripheral edge portions 118fb and 119fb) via an insulating adhesive (insulating sealing material) 140. Thus, the outer peripheral material 111 is sandwiched between the peripheral portions 111f. For this reason, the insulation between the electrode terminal members 130 and 130 and the peripheral portion 111f (first and second outer metal peripheral portions 118fb and 119fb) of the exterior material 111 can be ensured.

  Further, in the present embodiment, since the paper material 113 is made of paper having high heat resistance as described above, the heat resistance of the battery case 110 is also obtained when the all solid state battery 100 is used in a high temperature atmosphere such as 100 ° C. or higher. Sufficient durability, durability and weather resistance. In particular, the inner layer of the outer packaging material 111 tends to be at a high temperature because it contacts the power generation element 120, but in this embodiment, the inner layer of the outer packaging material 111 is the paper material 113. In addition, durability and weather resistance can be sufficiently improved.

Next, a method for manufacturing the all solid state battery 100 will be described (see FIGS. 2 to 7).
First, rectangular paper (aramid paper) is prepared and molded to form a first paper material 114 having first concave portions 114h having a rectangular shape in plan view as shown in FIG. Similarly, a rectangular paper is formed to form a second paper material 115 having a second recess 115h that is rectangular in plan view.

  Also, a rectangular metal foil (aluminum foil) is prepared and molded to form a first metal material 118 having a third recess 118h that is rectangular in plan view as shown in FIG. Similarly, a rectangular metal foil is formed to form a second metal material 119 having a fourth recess 119h that is rectangular in plan view. At that time, the lengths (widths) C and D of the first and second metal peripheral portions 118f and 119f of the first and second metal materials 118 and 119 are the same as the first and second paper materials 114 and 115, respectively. It is made larger than the lengths (widths) A and B of the second paper peripheral edge portions 114f and 115f.

  Next, as shown in FIG. 4, the first paper material 114 and the first metal material 118 are overlapped with each other, and the first recess 114 h of the first paper material 114 is placed in the third recess 118 h of the first metal material 118. The first paper peripheral edge 114f of the first paper material 114 is overlapped with the first inner metal peripheral edge 118fa of the first metal peripheral edge 118f of the first metal material 118. Similarly, the second paper material 115 and the second metal material 119 are overlapped with each other so that the second recess 115h of the second paper material 115 is accommodated in the fourth recess 119h of the second metal material 119, and the second paper The second paper peripheral edge 115f of the material 115 is overlapped with the second inner metal peripheral edge 119fa of the second metal peripheral edge 119f of the second metal material 119. In this state, the first and second paper peripheral portions 114f and 115f of the first and second paper materials 114 and 115 are the first and second metal peripheral portions 118f and 119f of the first and second metal materials 118 and 119, respectively. Further, the first and second metal peripheral edges 118fb and 119fb of the first and second metal peripheral edges 118f and 119f are exposed, respectively.

Next, as shown in FIG. 5, the second paper material 115 and the second metal material 119 that are overlapped, of the second outer metal peripheral edge 119fb of the second metal peripheral edge 119f of the second metal material 119, An insulating adhesive (insulating sealing material) 140 is applied to a portion where the electrode terminal members 130 and 130 are to be contacted later and a peripheral portion thereof.
Further, as shown in FIG. 6, the first paper material 114 and the first metal material 118 that are overlapped are substantially the same as the first outer metal peripheral portion 118 fb of the first metal peripheral portion 118 f of the first metal material 118. The same insulating adhesive 140 is applied to the vicinity of the outer peripheral edge of the first paper peripheral portion 114 f of the first paper material 114.

Next, as shown in FIG. 7, the power generation element 120 to which the electrode terminal members 130 and 130 are connected is prepared. And it mounts in the predetermined position of the 2nd paper material 115 and the 2nd metal material 119 which apply | coated the insulating adhesive agent 140. FIG. Further, the first paper material 114 and the first metal material 118 to which the insulating adhesive 140 is applied are turned over and overlapped with the second paper material 115 and the second metal material 119. At this time, since the insulating adhesive 140 is applied to the first paper material 114 and the first metal material 118 as described above, the first paper material 114 does not fall from the first metal material 118.
Thereafter, if the insulating adhesive 140 is thermally cured, the all-solid battery 100 is completed.

In the above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can be appropriately modified and applied without departing from the gist thereof.
For example, in the above-described embodiment, the exterior material 111 is exemplified as including the paper material 113 and the metal material 117. However, the exterior material has a paper layer in the innermost layer and a metal layer in the outer layer. Any layer may be used, and the layer structure can be changed as appropriate. For example, when the all-solid-state battery 100 is a sulfide-based solid battery, in consideration of the possibility that hydrogen sulfide gas is generated, gas adsorption is performed between the paper material 113 and the metal material 117 of the exterior material 111. It is preferable to interpose an activated carbon sheet or the like. When the all solid state battery 100 is a sulfide type solid state battery, an activated carbon coat can be applied to the outside of the paper material 113.

100 all solid state battery 110 battery case 111 exterior material 111f peripheral edge 113 paper material (paper layer)
114 1st paper material 114f 1st paper peripheral part 115 2nd paper material 115f 2nd paper peripheral part 117 Metal material (metal layer)
118 1st metal material 118f 1st metal peripheral part 119 2nd metal material 119f 2nd metal peripheral part 120 Electric power generation element 125 Solid electrolyte body 130 Electrode terminal member 140 Insulating adhesive (insulating sealing material)
KB1, KB2 Restraint member

Claims (2)

A power generation element having a solid electrolyte body;
A battery case that houses the power generation element, is made of an exterior material having a plurality of layers, and has its peripheral portions overlapped and bonded to each other and sealed,
An all-solid-state battery that is electrically connected to the power generation element and includes an electrode terminal member that extends from the inside of the battery case to the outside through the peripheral portions of the exterior material,
The exterior material constituting the battery case is
Located in the innermost layer, a paper layer made of paper,
It is located outside the paper layer, and has a metal layer made of metal,
Among the metal layers, the metal peripheral edge located at the peripheral edge of the exterior material is the outer metal peripheral edge located outside the paper peripheral edge located at the peripheral edge of the exterior material in the paper layer. Including
At least the outer metal peripheral edge portions of the metal peripheral edge portions are joined to each other without being interposed through the paper peripheral edge portion, and are sealed together to join the peripheral edge portions of the exterior material. ,
An all solid state battery in which the electrode terminal member is sandwiched between the peripheral portions of the exterior member in a state where the electrode terminal member is insulated from the peripheral portion of the outer metal through an insulating sealing material. The all-solid-state battery according to claim 1,
The paper layer is an all-solid battery made of paper having heat resistance of 200 ° C. or higher.

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