Battery module, vehicle, and method for manufacturing battery module

Abstract

A battery module 100 according to the present disclosure comprises a battery case 30, at least one sulfide based battery 10 arranged inside the battery case 30, and at least one halogen based battery 20 arranged inside the battery case 30. A vehicle 160 according the present disclosure comprises the battery module 100 and an electric motor 161 driven by power from the battery module 100. A production method for the battery module according to the present disclosure includes arranging at least one sulfide based battery 10 inside the battery case 30, and arranging at least one halogen based battery 20 inside the battery case 30.

Description

[Technical Field]

[0001] The present disclosure relates to a battery module, a vehicle, and a method for manufacturing a battery module. [Background technology]

[0002] In recent years, research and development of batteries using solid electrolytes has been actively conducted. Patent Document 1 discloses an all-solid-state battery including a positive electrode, a sulfide solid electrolyte layer, and a negative electrode in this order. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-069848 Summary of the Invention [Problem to be solved by the invention]

[0004] Batteries have different characteristics depending on the solid electrolyte they use. The present disclosure provides a battery module that offers an excellent balance between output characteristics and safety. [Means for solving the problem]

[0005] The battery module of the present disclosure includes: a first battery case; At least one sulfide-based battery disposed inside the first battery case; at least one halogen-based battery disposed inside the first battery case; It is equipped with: [Effects of the Invention]

[0006] According to the present disclosure, a battery module with an excellent balance between output characteristics and safety can be provided. [Brief explanation of the drawings]

[0007] [Figure 1A]FIG. 1A is a schematic cross-sectional view of a battery module in accordance with Embodiment 1 taken along a plane parallel to the ZX plane. [Figure 1B] FIG. 1B is a schematic cross-sectional view of the battery module in accordance with the first embodiment taken along a plane parallel to the XY plane. [Figure 1C] FIG. 1C is a schematic cross-sectional view of the battery module in accordance with the first embodiment taken along a plane parallel to the YZ plane. [Figure 2] FIG. 2 is a flowchart showing a method for manufacturing the battery module according to the first embodiment. [Figure 3A] FIG. 3A is a schematic cross-sectional view of a battery module in accordance with Embodiment 2 taken along a plane parallel to the ZX plane. [Figure 3B] FIG. 3B is a schematic cross-sectional view of the battery module in accordance with the second embodiment taken along a plane parallel to the XY plane. [Figure 3C] FIG. 3C is a schematic cross-sectional view of the battery module in accordance with the second embodiment taken along a plane parallel to the YZ plane. [Figure 4A] FIG. 4A is a schematic cross-sectional view of a battery module in accordance with Embodiment 3 taken along a plane parallel to the ZX plane. [Figure 4B] FIG. 4B is a schematic cross-sectional view of the battery module in accordance with the third embodiment taken along a plane parallel to the XY plane. [Figure 4C] FIG. 4C is a schematic cross-sectional view of the battery module in accordance with the third embodiment taken along a plane parallel to the YZ plane. [Figure 5A] FIG. 5A is a schematic cross-sectional view of a battery module in accordance with Embodiment 4 taken along a plane parallel to the ZX plane. [Figure 5B] FIG. 5B is a schematic cross-sectional view of the battery module in accordance with the fourth embodiment taken along a plane parallel to the XY plane. [Figure 5C] FIG. 5C is a schematic cross-sectional view of the battery module in accordance with the fourth embodiment taken along a plane parallel to the YZ plane. [Figure 6]FIG. 6 is a schematic cross-sectional view of a battery module according to Modification 1 of Embodiment 4 taken along a plane parallel to the ZX plane. [Figure 7] FIG. 7 is a schematic cross-sectional view of a battery module according to Modification 2 of Embodiment 4 taken along a plane parallel to the ZX plane. [Figure 8] FIG. 8 is a schematic cross-sectional view of the battery module in accordance with the fifth embodiment taken along a plane parallel to the ZX plane. [Figure 9] FIG. 9 is a schematic cross-sectional view of the battery module according to the sixth embodiment taken along a plane parallel to the ZX plane. [Figure 10] FIG. 10 is a flowchart showing a method for manufacturing a battery module according to the sixth embodiment. [Figure 11] FIG. 11 is an explanatory diagram showing a schematic configuration of a vehicle according to the seventh embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] (Findings that formed the basis of this disclosure) Batteries using sulfide-based solid electrolytes as the solid electrolyte have excellent output characteristics, while batteries using halogen-based solid electrolytes as the solid electrolyte are safer than batteries using sulfide-based solid electrolytes.

[0009] In this disclosure, the "output characteristics" of a battery refer to the capacity per unit volume or unit weight of the battery. The "safety" of a battery refers to the resistance to combustion of the battery, and can be evaluated, for example, based on a combustion test of the solid electrolyte, which is the material of the battery. The combustion test is conducted in accordance with the "Test method for flammability using oxygen index" specified in JIS K7201.

[0010] (Summary of one aspect of the present disclosure) The battery module according to the first aspect of the present disclosure includes: a first battery case; At least one sulfide-based battery disposed inside the first battery case; at least one halogen-based battery disposed inside the first battery case; Equipped with.

[0011] According to the first aspect, it is possible to provide a battery module that has an excellent balance between the output characteristics of a sulfide-based battery and the safety of a halogen-based battery.

[0012] In a second aspect of the present disclosure, for example, in the battery module according to the first aspect, the sulfide-based battery and the halogen-based battery may be plate-shaped, and the area of ​​a main surface of the halogen-based battery may be larger than the area of ​​a main surface of the sulfide-based battery. With this configuration, it is possible to provide a battery module that maintains the output characteristics of the sulfide-based battery while improving the safety of the halogen-based battery.

[0013] In a third aspect of the present disclosure, for example, in the battery module according to the first or second aspect, the sulfide-based battery and the halogen-based battery may be plate-shaped, and when the halogen-based battery and the sulfide-based battery are viewed from above in the thickness direction of the halogen-based battery, the entire outer edge of the sulfide-based battery may be contained within the outer edge of the halogen-based battery. With this configuration, it is possible to provide a battery module that maintains the output characteristics of the sulfide-based battery while further improving the safety of the halogen-based battery.

[0014] In a fourth aspect of the present disclosure, for example, in the battery module according to any one of the first to third aspects, the halogen-based battery may be in contact with the sulfide-based battery. This configuration provides a battery module that maintains the output characteristics of the sulfide-based battery while improving the safety of the halogen-based battery. Furthermore, the volume occupied by the sulfide-based battery and the halogen-based battery can be reduced, enabling a higher battery capacity.

[0015] In a fifth aspect of the present disclosure, for example, in the battery module according to any one of the first to fourth aspects, the at least one halogen-based battery may include a plurality of halogen-based batteries, and the sulfide-based battery and the halogen-based batteries may be arranged in a predetermined direction inside the first battery case, with a halogen-based battery located at each of one end and the other end in the predetermined direction. With this configuration, highly safe halogen-based batteries are located at each of one end and the other end of the first battery case, making it possible to provide a battery module with further improved safety.

[0016] In a sixth aspect of the present disclosure, for example, in the battery module according to the fifth aspect, the at least one sulfide battery may include a plurality of sulfide batteries. With this configuration, a battery module with further improved output characteristics can be provided, since a plurality of sulfide batteries with high output characteristics are included.

[0017] In a seventh aspect of the present disclosure, for example, in the battery module according to the sixth aspect, the sulfide-based batteries and the halogen-based batteries may be arranged alternately in a predetermined direction inside the first battery case. With this configuration, it is possible to provide a battery module that has an excellent balance between the output characteristics of the sulfide-based batteries and the safety of the halogen-based batteries.

[0018] In an eighth aspect of the present disclosure, for example, in the battery module according to any one of the fifth to seventh aspects, the sulfide battery may be disposed in a space surrounded by a main surface of the halogen battery and an inner wall of the first battery case. With this configuration, the safety of the sulfide battery can be ensured by the halogen battery and the inner wall of the first battery case, thereby providing a battery module with superior safety.

[0019] In a ninth aspect of the present disclosure, for example, in the battery module according to any one of the first to eighth aspects, the sulfide-based battery and the halogen-based battery may each have a main surface and a side surface, the at least one halogen-based battery may include a first halogen-based battery and a second halogen-based battery, and the first halogen-based battery may cover the main surface of the sulfide-based battery. With this configuration, the safety of the sulfide-based battery can be ensured by the halogen-based battery, so a battery module with improved safety can be provided.

[0020] In a tenth aspect of the present disclosure, for example, in the battery module according to any one of the first to eighth aspects, the sulfide-based battery and the halogen-based battery may each have a main surface and a side surface, and the at least one halogen-based battery may include a first halogen-based battery and a third halogen-based battery, and the first halogen-based battery may cover the main surface of the sulfide-based battery, and the third halogen-based battery may cover the main surface and the side surface of the sulfide-based battery. With this configuration, the safety of the sulfide-based battery can be ensured by the halogen-based battery, so a battery module with improved safety can be provided.

[0021] In an eleventh aspect of the present disclosure, for example, in the battery module according to any one of the first to eighth aspects, the sulfide-based battery and the halogen-based battery may each have a main surface and a side surface, and the at least one halogen-based battery may include a first halogen-based battery and a fourth halogen-based battery, and the first halogen-based battery may cover the main surface of the sulfide-based battery, and the fourth halogen-based battery may cover the side surface of the sulfide-based battery. With this configuration, the safety of the sulfide-based battery can be ensured by the halogen-based battery, so a battery module with improved safety can be provided.

[0022] In a twelfth aspect of the present disclosure, for example, the battery module according to any one of the first to eleventh aspects may further include a second battery case made of a flexible packaging material, and the sulfide battery and the halogen battery may be disposed inside the second battery case so as to share the second battery case, or an assembly including the sulfide battery, the halogen battery, and the second battery case may be disposed inside the first battery case. With such a configuration, the volume of the assembly can be reduced, thereby enabling a battery module with a high capacity.

[0023] In a thirteenth aspect of the present disclosure, for example, in the battery module according to any one of the first to twelfth aspects, the sulfide-based battery may contain an electrolyte solution containing an organic substance. With this configuration, it is possible to provide a battery module that improves the output characteristics of the sulfide-based battery while ensuring safety using the halogen-based battery.

[0024] In a fourteenth aspect of the present disclosure, for example, in the battery module according to the thirteenth aspect, the halogen-based batteries may not contain the electrolyte solution. With this configuration, it is possible to provide a battery module with improved safety of the halogen-based batteries.

[0025] A vehicle according to a fifteenth aspect of the present disclosure includes: a battery module according to any one of the first to fourteenth aspects; an electric motor driven by power from the battery module; Equipped with.

[0026] According to the fifteenth aspect, the electric motor is driven by power from the battery module, which has an excellent balance between output characteristics and safety, and therefore people and luggage can be moved safely with excellent output characteristics.

[0027] A method for manufacturing a battery module according to a sixteenth aspect of the present disclosure includes: disposing at least one sulfide-based battery within a first battery case; disposing at least one halogen-based battery inside the first battery case; Includes:

[0028] According to the sixteenth aspect, it is possible to manufacture a battery module that has an excellent balance between the output characteristics of a sulfide-based battery and the safety of a halogen-based battery.

[0029] In a seventeenth aspect of the present disclosure, for example, in the manufacturing method of the battery module according to the sixteenth aspect, the at least one sulfide-based battery may include a plurality of sulfide-based batteries, and the at least one halogen-based battery may include a plurality of halogen-based batteries, and in the manufacturing method, the plurality of sulfide-based batteries and the plurality of halogen-based batteries may be arranged inside the first battery case so that the sulfide-based batteries and the halogen-based batteries are alternately arranged in a predetermined direction. With this configuration, a battery module can be manufactured that has an excellent balance between the output characteristics of the sulfide-based battery and the safety of the halogen-based battery.

[0030] In an eighteenth aspect of the present disclosure, for example, the method for manufacturing a battery module according to the sixteenth or seventeenth aspect may further include arranging the at least one sulfide-based battery and the at least one halogen-based battery inside the second battery case so that a second battery case made of a flexible packaging material is shared, and arranging an assembly including the at least one sulfide-based battery, the at least one halogen-based battery, and the second battery case inside the first battery case. This configuration allows the volume of the assembly to be reduced, thereby enabling the manufactured battery module to have a high capacity.

[0031] Coordinate axes may be shown in the drawings used in the following embodiments. The X-axis direction of the coordinate axes is, for example, described as the thickness direction of the battery. The Y-axis direction is described as the horizontal direction of the battery, and the Z-axis direction is described as the vertical direction of the battery. A surface of the battery parallel to the YZ plane is described as a main surface. The main surface may be the top or bottom surface of the battery. The main surface is, for example, one of the widest pair of surfaces. A surface of the battery other than the main surface is described as a side surface.

[0032] (Embodiment 1) Hereinafter, the first embodiment will be described with reference to FIGS. 1A to 1C.

[0033] [composition] Fig. 1A is a schematic cross-sectional view of a battery module according to embodiment 1 taken along a plane parallel to the ZX plane. Fig. 1B is a schematic cross-sectional view of a battery module according to embodiment 1 taken along a plane parallel to the XY plane. Fig. 1C is a schematic cross-sectional view of a battery module according to embodiment 1 taken along a plane parallel to the YZ plane.

[0034] The battery module 100 in the first embodiment includes a plurality of sulfide batteries 10, a plurality of halogen batteries 20, and a battery case 30. The plurality of sulfide batteries 10 and the plurality of halogen batteries 20 are arranged inside the battery case 30. The battery module 100 includes at least one sulfide battery 10 and one halogen battery 20. The number of sulfide batteries 10 and the number of halogen batteries 20 included in the battery module 100 are not particularly limited.

[0035] The sulfide battery 10 is a battery that uses a sulfide solid electrolyte. The sulfide battery 10 may be a unit cell.

[0036] The sulfide-based battery 10 may contain an electrolytic solution containing an organic substance. By including an electrolytic solution, the output characteristics of the sulfide-based battery 10 are improved. As the electrolytic solution, a liquid in which an electrolyte is dissolved in an organic solvent is used. As the organic solvent, an organic solvent for battery electrolytic solutions is used. As the electrolyte, an electrolyte for battery electrolytic solutions is used. An example of an electrolytic solution is an ionic liquid. An ionic liquid exists in a liquid state at room temperature and has the characteristics of low volatility and a high decomposition temperature.

[0037] The sulfide battery 10 has a rectangular, plate-like shape when viewed from above in the thickness direction. The X-axis direction is the thickness direction. The sulfide battery 10 may have other shapes. The shape of the sulfide battery 10 may be a cube or a rectangular parallelepiped.

[0038] The sulfide-based battery 10 is realized, for example, as a battery cell in which power generating elements including a positive electrode, a negative electrode, and an electrolyte layer are sealed in an exterior body. The sulfide-based battery 10 may be a lithium secondary battery cell. The exterior body is made of, for example, a laminate film. The laminate film is, for example, an aluminum laminate film for batteries.

[0039] The sulfide-based battery 10 includes a positive electrode, an electrolyte layer containing a sulfide-based solid electrolyte, and a negative electrode in this order.

[0040] The positive electrode contains a positive electrode active material capable of absorbing and releasing metal ions (for example, lithium ions). As the positive electrode active material, a commonly known active material for battery positive electrodes can be used.

[0041] The negative electrode contains a negative electrode active material capable of absorbing and releasing metal ions (for example, lithium ions). As the negative electrode active material, a commonly known active material for battery negative electrodes is used.

[0042] The halogen-based battery 20 is a battery that includes a halogen-based solid electrolyte. The halogen-based battery 20 may be a unit cell. The halogen-based battery 20 is, for example, an all-solid-state battery that does not include any liquid electrolyte.

[0043] The halogen-based battery 20 has a rectangular, plate-like shape when viewed from above in the thickness direction. The X-axis direction is the thickness direction. In this embodiment, the area of ​​the main surface of the halogen-based battery 20 is equal to the area of ​​the main surface of the sulfide-based battery 10. The halogen-based battery 20 may have another shape. The shape of the halogen-based battery 20 may be a cube or a rectangular parallelepiped. The halogen-based battery 20 may have a single-layer structure or a laminated structure.

[0044] The halogen-based battery 20 is realized, for example, as a battery cell in which power generating elements including a positive electrode, a negative electrode, and an electrolyte layer are sealed in an exterior body. The halogen-based battery 20 may be a lithium secondary battery cell. The exterior body is made of, for example, a laminate film.

[0045] The halogen-based battery 20 includes a positive electrode, an electrolyte layer containing a halogen-based solid electrolyte, and a negative electrode in this order.

[0046] The positive electrode contains a positive electrode active material capable of absorbing and releasing metal ions (for example, lithium ions). As the positive electrode active material, a commonly known active material for battery positive electrodes can be used.

[0047] The negative electrode contains a negative electrode active material capable of absorbing and releasing metal ions (for example, lithium ions). As the negative electrode active material, a commonly known active material for battery negative electrodes is used.

[0048] In the present disclosure, a "sulfide-based solid electrolyte" refers to a solid electrolyte containing a sulfide. In the present disclosure, a "halogen-based solid electrolyte" refers to a solid electrolyte containing a halogen element. The halogen-based solid electrolyte includes at least one selected from the group consisting of a halide solid electrolyte and an oxyhalide solid electrolyte.

[0049] The sulfide-based battery 10 is, for example, a battery in which the main component of the solid electrolyte contained in the electrolyte layer is a sulfide-based solid electrolyte. The halogen-based battery 20 is, for example, a battery in which the main component of the solid electrolyte contained in the electrolyte layer is a halogen-based solid electrolyte. "Main component" means the component that is contained in the largest volume ratio. The electrolyte layer of the sulfide-based battery 10 may contain a halogen-based solid electrolyte. The electrolyte layer of the halogen-based battery 20 may contain a sulfide-based solid electrolyte.

[0050] Examples of sulfide-based solid electrolytes include Li2S-P2S5, Li2S-SiS2, Li2S-B2S3, Li2S-GeS2, and Li 3.25 Ge 0.25 P 0.75 S4, Li 10 GeP2S 12 In addition to these, LiX, Li2O, MO q , Li p MO q or the like may be added. Here, the element X is at least one selected from the group consisting of F, Cl, Br, and I. Furthermore, the element M is at least one selected from the group consisting of P, Si, Ge, B, Al, Ga, In, Fe, and Zn. p and q are each a natural number. According to the above configuration, the output characteristics of the battery can be further improved. One or more sulfide-based solid electrolytes selected from the above materials can be used.

[0051] The halide solid electrolyte may be, for example, a material containing Li, M1, and X1. Here, the element M is at least one selected from the group consisting of metal elements and semimetal elements other than Li. The element X1 is at least one selected from the group consisting of F, Cl, Br, and I. According to the above configuration, the ionic conductivity of the halide solid electrolyte can be further improved. This can further improve the output characteristics of the battery. In addition, the thermal stability of the battery can be improved. The halide solid electrolyte does not need to contain sulfur. If the halide solid electrolyte does not contain sulfur, the generation of hydrogen sulfide gas can be suppressed.

[0052] The halide solid electrolyte may be, for example, a material represented by the following composition formula (1).

[0053] Li α1 M β1 X γ1 ...Equation (1)

[0054] Here, α1, β1, and γ1 are each a value greater than 0. γ1 can be, for example, 4 or 6. According to the above configuration, the ionic conductivity of the halide solid electrolyte can be improved, thereby improving the output characteristics of the battery.

[0055] In the composition formula (1), the element M may contain Y (= yttrium). That is, the halide solid electrolyte may contain Y as a metal element. According to the above configuration, the ionic conductivity of the solid electrolyte can be further improved. This can further improve the charge / discharge characteristics of the battery.

[0056] The halide solid electrolyte containing Y is, for example, Li a Me b Y c The compound may be a compound represented by the composition formula X6, where a+mb+3c=6 and c>0 are satisfied. The element Me is at least one selected from the group consisting of metal elements and metalloid elements excluding Li and Y. m is the valence of the element Me. The element X is at least one selected from the group consisting of F, Cl, Br, and I.

[0057] The element Me may be, for example, at least one selected from the group consisting of Mg, Ca, Sr, Ba, Zn, Sc, Al, Ga, Bi, Zr, Hf, Ti, Sn, Ta and Nb.

[0058] For example, the following materials can be used as the halide solid electrolyte. The following configurations can further improve the ionic conductivity of the solid electrolyte, thereby further improving the output characteristics of the battery.

[0059] The halide solid electrolyte may be a material represented by the following compositional formula (A1).

[0060] Li 6-3d Y d X6 ··· Formula (A1)

[0061] In the compositional formula (A1), the element X is at least one selected from the group consisting of Cl, Br, and I. Also, 0 < d < 2 is satisfied.

[0062] The halide solid electrolyte may be a material represented by the following compositional formula (A2).

[0063] Li3YX6 ··· Formula (A2)

[0064] In the compositional formula (A2), the element X is at least one selected from the group consisting of Cl, Br, and I.

[0065] The halide solid electrolyte may be a material represented by the following compositional formula (A3).

[0066] Li 3-3δ Y 1+δ Cl6 ··· Formula (A3)

[0067] In the compositional formula (A3), 0 < δ ≦ 0.15 is satisfied.

[0068] The halide solid electrolyte may be a material represented by the following compositional formula (A4).

[0069] Li 3-3δ Y 1+δ Br6 ··· Formula (A4)

[0070] In the compositional formula (A4), 0 < δ ≦ 0.25 is satisfied.

[0071] The halide solid electrolyte may be a material represented by the following compositional formula (A5).

[0072] Li 3-3δ+a Y 1+δ-a Me a Cl 6-x-y Br x I y ··· Formula (A5)

[0073] In the compositional formula (A5), the element Me is at least one selected from the group consisting of Mg, Ca, Sr, Ba, and Zn. -1 < δ < 2, 0 < a < 3, 0 < (3 - 3δ + a), 0 < (1 + δ - a), 0 ≤ x ≤ 6, 0 ≤ y ≤ 6, and (x + y) ≤ 6 are satisfied.

[0074] The halide solid electrolyte may be a material represented by the following compositional formula (A6).

[0075] Li 3-3δ Y 1+δ-a Me a Cl 6-x-y Br x I y ··· Formula (A6)

[0076] In the compositional formula (A6), the element Me is at least one selected from the group consisting of Al, Sc, Ga, and Bi. -1 < δ < 1, 0 < a < 2, 0 < (1 + δ - a), 0 ≤ x ≤ 6, 0 ≤ y ≤ 6, and (x + y) ≤ 6 are satisfied.

[0077] The halide solid electrolyte may be a material represented by the following compositional formula (A7).

[0078] Li 3-3δ-a Y 1+δ-a Me a Cl 6-x-y Br x I y ··· Formula (A7)

[0079] In compositional formula (A7), the element Me is at least one selected from the group consisting of Zr, Hf, and Ti. -1 < δ < 1, 0 < a < 1.5, 0 < (3 - 3δ - a), 0 < (1 + δ - a), 0 ≤ x ≤ 6, 0 ≤ y ≤ 6, and (x + y) ≤ 6 are satisfied.

[0080] The halide solid electrolyte may be a material represented by the following compositional formula (A8).

[0081] Li 3-3δ-2a Y 1+δ-a Me a Cl 6-x-y Br x I y ··· Formula (A8)

[0082] In compositional formula (A8), the element Me is at least one selected from the group consisting of Ta and Nb. -1 < δ < 1, 0 < a < 1.2, 0 < (3 - 3δ - 2a), 0 < (1 + δ - a), 0 ≤ x ≤ 6, 0 ≤ y ≤ 6, and (x + y) ≤ 6 are satisfied.

[0083] More specifically, as the halide solid electrolyte, Li3YX6, Li2MgX4, Li2FeX4, Li(Al, Ga, In)X4, Li3(Al, Ga, In)X6, etc. can be used. Here, the element X is at least one selected from the group consisting of Cl, Br, and I. In the present disclosure, “(Al, Ga, In)” indicates at least one element selected from the group of elements within the parentheses. That is, “(Al, Ga, In)” is synonymous with “at least one selected from the group consisting of Al, Ga, and In”. The same applies to other elements.

[0084] The oxyhalide solid electrolyte may be, for example, a solid electrolyte represented by the following compositional formula (B1).

[0085] LiM2 b O c X2 d ··· Formula (B1)

[0086] In the above composition formula (B1), a, b, c, and d are positive real numbers. M2 is at least one selected from the group consisting of Ta and Nb. X2 is at least one selected from the group consisting of Cl, Br, and I.

[0087] X2 contained in the solid electrolyte represented by formula (B1) may contain Cl. By containing Cl, the solid electrolyte can have higher ionic conductivity and further higher oxidation stability. The oxyhalide solid electrolyte does not need to contain sulfur.

[0088] M2 contained in the solid electrolyte represented by formula (B1) may contain Ta. By containing Ta, the solid electrolyte can have higher ionic conductivity and further higher oxidation stability.

[0089] The sulfide-based battery 10 may contain only a solid electrolyte as the electrolyte. In other words, the sulfide-based battery 10 may be a solid-state battery. The halogen-based battery 20 may contain only a solid electrolyte as the electrolyte. In other words, the halogen-based battery 20 may be a solid-state battery. With this configuration, the safety of the battery module 100 is further improved.

[0090] The battery case 30 is a hollow housing that houses a plurality of sulfide-based batteries 10 and a plurality of halogen-based batteries 20. The battery case 30 has a substantially rectangular parallelepiped shape. The battery case 30 may be made of a metal material or a resin material.

[0091] The battery case 30 is an example of a first battery case. An exterior body made of a laminate film is an example of a second battery case. However, the battery case 30, which is the first battery case, may be an exterior body made of a laminate film itself. In this case, the sulfide battery 10 and the halogen battery 20 are disposed inside a single exterior body.

[0092] [Arrangement of sulfide-based batteries and halogen-based batteries] Within the battery case 30, the sulfide-based batteries 10 and the halogen-based batteries 20 are alternately arranged along a predetermined direction. This achieves a battery module 100 that achieves an excellent balance between the output characteristics of the sulfide-based batteries 10 and the safety of the halogen-based batteries 20. In this embodiment, the "predetermined direction" is the thickness direction and arrangement direction of the sulfide-based batteries 10 and the halogen-based batteries 20. In FIGS. 1A to 1C, the X-axis direction is the thickness direction and arrangement direction.

[0093] The halogen-based battery 20 is disposed in contact with the adjacent sulfide-based battery 10. Specifically, the main surface of the sulfide-based battery 10 and the main surface of the halogen-based battery 20 are in surface contact. When both the halogen-based battery 20 and the sulfide-based battery 10 are realized as battery cells in which power-generating elements including a positive electrode, a negative electrode, and an electrolyte layer are sealed in an exterior body, the exterior body covering the main surface of the sulfide-based battery 10 and the exterior body covering the main surface of the halogen-based battery 20 are in contact. With this configuration, the halogen-based battery 20 acts as a barrier, preventing a specific sulfide-based battery 10 from spreading to other sulfide-based liquid batteries 10. As a result, the safety of the battery module 10 is improved.

[0094] Within the battery case 30, a halogen battery 20 is located at each of one end and the other end in the arrangement direction of the sulfide-based batteries 10 and the halogen-based batteries 20. By having the halogen-based batteries 20 located at both ends, the safety of the battery module 100 is improved.

[0095] A plurality of sulfide-based batteries 10 may be arranged in series. That is, two or more sulfide-based batteries 10 may be sandwiched between two halogen-based batteries 20. Two or more sulfide-based batteries 10 may be arranged in series at one end and / or the other end in the arrangement direction. In these cases, the sulfide-based batteries 10 improve the output characteristics of the battery module 100. A plurality of halogen-based batteries 20 may be arranged in series. That is, two or more halogen-based batteries 20 may be sandwiched between two sulfide-based batteries 10. Two or more halogen-based batteries 20 may be arranged in series at one end and / or the other end in the arrangement direction. In these cases, the halogen-based batteries 20 improve the safety of the battery module 100. The main surface of at least one sulfide-based battery 10 does not need to be in contact with the main surface of the halogen-based battery 20. For example, there may be a gap between the halogen-based battery 20 and the sulfide-based battery 10. Compared to a battery module including only sulfide-based batteries 10, such a configuration also improves the safety of the battery module 100. Support members for supporting the plurality of sulfide-based batteries 10 and the plurality of halogen-based batteries 20 may be provided inside the battery case 30. The support members allow the plurality of sulfide-based batteries 10 and the plurality of halogen-based batteries 20 to be stably arranged.

[0096] Next, a description will be given of a method for manufacturing the above-described battery module 100. The manufacturing method described in this embodiment can also be applied to other embodiments described later.

[0097] 2 is a flowchart showing a method for manufacturing the battery module 100 according to the first embodiment. The method for manufacturing the battery module 100 includes arranging at least one sulfide-based battery 10 inside a first battery case (step S1) and arranging at least one halogen-based battery 20 inside the first battery case (step S2). In the example shown in FIG. 2, step S2 is performed after step S1, but the order in which steps S1 and S2 are performed does not matter. Steps S1 and S2 may be performed simultaneously.

[0098] In the manufacturing method of the battery module 100 in the first embodiment, a plurality of sulfide-based batteries 10 and a plurality of halogen-based batteries 20 may be arranged inside the first battery case so that the sulfide-based batteries 10 and the halogen-based batteries 20 are alternately arranged in a predetermined direction.

[0099] In the manufacturing method of the battery module 100 in the first embodiment, the sulfide batteries 10 and the halogen batteries 20 may be arranged in a row so as to obtain the battery module 100 having the configuration described above.

[0100] Below, several other embodiments will be described. Elements common to the first embodiment and the other embodiments will be given the same reference numerals, and their description may be omitted. The descriptions of the respective embodiments may be mutually applied unless there is a technical contradiction. The respective embodiments may be mutually combined unless there is a technical contradiction.

[0101] (Embodiment 2) Fig. 3A is a schematic cross-sectional view of the battery module according to embodiment 2 taken along a plane parallel to the ZX plane. Fig. 3B is a schematic cross-sectional view of the battery module according to embodiment 2 taken along a plane parallel to the XY plane. Fig. 3C is a schematic cross-sectional view of the battery module according to embodiment 2 taken along a plane parallel to the YZ plane.

[0102] In the battery module 101 of the second embodiment, the area of ​​the main surface of the halogen-based battery 20 is larger than the area of ​​the main surface of the sulfide-based battery 10. That is, in the battery module 101, the halogen-based battery 20 has an outer shape slightly larger than that of the sulfide-based battery 10. This realizes a battery module 101 in which the safety of the halogen-based battery 20 is improved while maintaining the output characteristics of the sulfide-based battery 10.

[0103] Within the battery case 30, the plurality of sulfide-based batteries 10 and the plurality of halogen-based batteries 20 are arranged so that, when the halogen-based batteries 20 and the sulfide-based batteries 10 are viewed from above in the thickness direction of the halogen-based batteries 20, the entire outer edge of the sulfide-based batteries 10 is contained inside the outer edge of the halogen-based batteries 20. This allows the halogen-based batteries 20 adjacent to the sulfide-based batteries 10 to act as barriers, preventing a specific sulfide-based battery 10 from spreading to other sulfide-based batteries 10.

[0104] In the manufacturing method of the battery module 101 in the second embodiment, the sulfide batteries 10 and the halogen batteries 20 may be arranged in a row so as to obtain the battery module 101 having the configuration described above.

[0105] (Embodiment 3) Fig. 4A is a schematic cross-sectional view of the battery module according to embodiment 3 taken along a plane parallel to the ZX plane. Fig. 4B is a schematic cross-sectional view of the battery module according to embodiment 3 taken along a plane parallel to the XY plane. Fig. 4C is a schematic cross-sectional view of the battery module according to embodiment 3 taken along a plane parallel to the YZ plane.

[0106] In the battery module 102 of the third embodiment, a space S is formed by the main surfaces of the two halogen batteries 20 and the inner wall of the battery case 30. The space S can be a substantially closed space. It is not essential that the space S be a sealed space.

[0107] Within the battery case 30, all side surfaces of each of the multiple halogen batteries 20 contact the inner wall of the battery case 30. Each of the multiple sulfide batteries 10 is arranged in a space S surrounded by one main surface of two adjacent halogen batteries 20 sandwiching the sulfide battery 10 and the inner wall of the battery case 30. This ensures the safety of the sulfide batteries 10 by the halogen batteries 20, thereby achieving a battery module 102 with superior safety.

[0108] In the manufacturing method of the battery module 102 according to the third embodiment, the sulfide batteries 10 and the halogen batteries 20 may be arranged in a manner that will result in the battery module 102 having the configuration described above.

[0109] (Fourth embodiment) Fig. 5A is a schematic cross-sectional view of the battery module according to embodiment 4 taken along a plane parallel to the ZX plane. Fig. 5B is a schematic cross-sectional view of the battery module according to embodiment 4 taken along a plane parallel to the XY plane. Fig. 5C is a schematic cross-sectional view of the battery module according to embodiment 4 taken along a plane parallel to the YZ plane.

[0110] The battery module 103 in the fourth embodiment includes a plurality of sulfide-based batteries 10, a plurality of halogen-based batteries 20, and a plurality of halogen-based batteries 22. The halogen-based batteries 20 are an example of first halogen-based batteries. The halogen-based batteries 22 are an example of second halogen-based batteries.

[0111] The composition of the solid electrolyte used in the halogen-based battery 22 may be the same as or different from the composition of the solid electrolyte used in the halogen-based battery 20. The halogen-based battery 22 may be a unit cell.

[0112] The halogen battery 22 has a rectangular, plate-like shape when viewed in a plan view from the vertical or horizontal direction. The Z-axis direction is the vertical direction. The Y-axis direction is the horizontal direction. The halogen battery 22 may have other shapes. The shape of the halogen battery 22 may be a cube or a rectangular parallelepiped. The halogen battery 22 may have a single-layer structure or a laminated structure.

[0113] Four halogen-based batteries 22 are arranged corresponding to the four side surfaces of the halogen-based batteries 20 and the sulfide-based batteries 10 so as to surround the side surfaces of the halogen-based batteries 20 and the sulfide-based batteries 10 on all four sides. Therefore, within the battery case 30, the halogen-based batteries 20 cover the main surfaces of the sulfide-based batteries 10, and the halogen-based batteries 22 cover the side surfaces of the halogen-based batteries 20 and the sulfide-based batteries 10. In other words, the entire surface of the sulfide-based battery 10 is covered by the halogen-based batteries 20 and the halogen-based batteries 22. This ensures the safety of the sulfide-based battery 10, thereby realizing a battery module 103 with superior safety. The halogen-based batteries 22 do not necessarily have to be arranged so as to surround the side surfaces of the halogen-based batteries 20 and the sulfide-based batteries 10 on all four sides, but may be arranged so as to cover at least one side surface of the halogen-based batteries 20 and the sulfide-based batteries 10.

[0114] In the manufacturing method of the battery module 103 in the fourth embodiment, the sulfide-based battery 10, the halogen-based battery 20, and the halogen-based battery 22 may be arranged so as to obtain the battery module 103 having the configuration described above.

[0115] (Variation 1) 6 is a schematic cross-sectional view of the battery module according to Modification 1 taken along a plane parallel to the ZX plane. The battery module 103a includes a plurality of sulfide-based batteries 10, one halogen-based battery 20, and a plurality of halogen-based batteries 22a. The halogen-based battery 20 is an example of a first halogen-based battery. The halogen-based battery 22a is an example of a third halogen-based battery.

[0116] The battery module 103a includes a plurality of halogen-based batteries 22a in addition to one halogen-based battery 20. The composition of the solid electrolyte used in the halogen-based batteries 22a may be the same as or different from the composition of the solid electrolyte used in the halogen-based battery 20. The halogen-based batteries 22a may be unit cells.

[0117] The halogen battery 22a has a recess R for accommodating the sulfide battery 10. The recess R is open in the thickness direction (X-axis direction) of the halogen battery 22a. The recess R has a shape and size that are approximately the same as the outer shape of the sulfide battery 10.

[0118] The halogen battery 22a has a plate-like shape with the thickness direction in the X-axis direction when the sulfide battery 10 is housed in the recess R. The halogen battery 22a has a size that allows one sulfide battery 10 to be embedded. The halogen battery 22a may have other shapes. The halogen battery 22a may have a single-layer structure or a laminated structure.

[0119] Within the battery case 30, the halogen-based battery 22a covers one main surface of the sulfide-based battery 10 and all side surfaces of the sulfide-based battery 10 with the recessed portion R. The other main surface of the sulfide-based battery 10 contacts the main surface of the adjacent halogen-based battery 22a where the recessed portion R is not formed. A halogen-based battery 20 is arranged in the direction of the opening of the end-located halogen-based battery 22a. One main surface of the halogen-based battery 20 contacts the main surface of the adjacent sulfide-based battery 10 that is not in contact with the halogen-based battery 22a. In this way, the main surface and side surfaces of each of the multiple sulfide-based batteries 10 are covered by the halogen-based battery 20 and the halogen-based battery 22a. This ensures the safety of the sulfide-based battery 10 by the halogen-based battery 20 and the halogen-based battery 22a, thereby realizing a battery module 103a with improved safety.

[0120] In the manufacturing method of the battery module 103a in the first modification, the sulfide battery 10, the halogen battery 20, and the halogen battery 22a may be arranged so as to obtain the battery module 103a having the configuration described above.

[0121] (Variation 2) 7 is a schematic cross-sectional view of a battery module according to Modification 2 taken along a plane parallel to the ZX plane. A battery module 103b according to Modification 2 includes a plurality of sulfide batteries 10, a plurality of halogen batteries 20, and a plurality of halogen batteries 22b. The halogen batteries 20 are an example of first halogen batteries. The halogen batteries 22b are an example of fourth halogen batteries.

[0122] Battery module 103b includes a plurality of halogen-based batteries 22b in addition to a plurality of halogen-based batteries 20. The composition of the solid electrolyte used in halogen-based batteries 22b may be the same as or different from the composition of the solid electrolyte used in halogen-based batteries 20. Halogen-based batteries 22b may be unit cells.

[0123] The halogen battery 22b has a rectangular, plate-like shape when viewed in a vertical or horizontal plane. The Z-axis direction is the vertical direction. The Y-axis direction is the horizontal direction. The halogen battery 22b may have other shapes. The shape of the halogen battery 22b may be a cube or a rectangular parallelepiped. The halogen battery 22b may have a single-layer structure or a laminated structure.

[0124] Four halogen-based batteries 22b are arranged corresponding to the four side surfaces of one sulfide-based battery 10 so as to surround the side surfaces of the sulfide-based battery 10 on all four sides. Therefore, within the battery case 30, the halogen-based batteries 20 cover the main surfaces of the sulfide-based battery 10, and the halogen-based batteries 22b cover the side surfaces of the sulfide-based battery 10. That is, the entire surface of the sulfide-based battery 10 is covered by the halogen-based batteries 20 and 22b. This ensures the safety of the sulfide-based battery 10 by the halogen-based batteries 20 and 22b, thereby realizing a battery module 103b with superior safety. The halogen-based batteries 22b do not necessarily have to be arranged so as to surround the side surfaces of one sulfide-based battery 10 on all four sides, but may be arranged so as to cover at least one side surface of one sulfide-based battery 10.

[0125] In the manufacturing method of the battery module 103b in the second modification, the sulfide battery 10, the halogen battery 20, and the halogen battery 22b may be arranged so as to obtain the battery module 103b having the configuration described above.

[0126] (Embodiment 5) 8 is a schematic cross-sectional view of the battery module in the fifth embodiment cut along a plane parallel to the ZX plane. The battery module 104 includes a plurality of sulfide batteries 10 and a plurality of halogen batteries 20. In this embodiment, the number of sulfide batteries 10 is greater than the number of halogen batteries 20. The number of sulfide batteries 10 and the number of halogen batteries 20 included in the battery module 104 are not particularly limited.

[0127] Within the battery case 30, a halogen battery 20 is located at each end in the arrangement direction (X-axis direction). A plurality of sulfide batteries 10 are sandwiched between two halogen batteries 20. This makes it possible to realize a battery module 104 in which the output characteristics of the sulfide batteries 10 are further improved while ensuring the safety of the halogen batteries 20.

[0128] In the manufacturing method of the battery module 104 according to the fifth embodiment, the sulfide batteries 10 and the halogen batteries 20 may be arranged in a manner such that the battery module 104 having the configuration described above is obtained.

[0129] (Embodiment 6) FIG. 9 is a schematic cross-sectional view of the battery module according to the sixth embodiment, taken along a plane parallel to the ZX plane. The battery module 105 includes a plurality of sulfide batteries 10, a plurality of halogen batteries 20, a battery case 30, and a laminate film 40. The number of sulfide batteries 10 and the number of halogen batteries 20 included in the battery module 105 are not particularly limited. In this embodiment, the sulfide batteries 10 and the halogen batteries 20 are arranged inside the laminate film 40 so as to share the laminate film 40. An assembly 50 including the sulfide batteries 10, the halogen batteries 20, and the laminate film 40 is arranged inside the battery case 30. A plurality of assemblies 50 may be arranged inside the battery case 30. The arrangement of the sulfide batteries 10 and the halogen batteries 20 may be, for example, any one of the arrangements of the above-described embodiments and modifications.

[0130] According to this embodiment, the amount of laminate film 40 used per unit capacity can be reduced, which contributes to improving the energy density of the battery module 105.

[0131] In the assembly 50, the sulfide-based battery 10 and the halogen-based battery 20 may or may not be in electrical contact. In the former case, for example, the positive electrode current collector of the sulfide-based battery 10 may be in contact with the negative electrode current collector of the halogen-based battery 20, and the negative electrode current collector of the sulfide-based battery 10 may be in contact with the positive electrode current collector of the halogen-based battery 20. In the latter case, an insulating layer such as a resin film may be provided between the sulfide-based battery 10 and the halogen-based battery 20.

[0132] Next, a method for manufacturing the above-mentioned battery module 105 will be described.

[0133] 10 is a flowchart showing a manufacturing method of a battery module 105 according to the sixth embodiment. The manufacturing method of the battery module 105 includes arranging at least one sulfide battery 10 and at least one halogen battery 20 inside a second battery case made of a flexible packaging material so that the second battery case is shared (step ST1). Step ST1 includes forming an assembly 50 including at least one sulfide battery 10, at least one halogen battery 20, and the second battery case. The manufacturing method also includes arranging the assembly 50 inside a first battery case (step ST2).

[0134] In the manufacturing method of the battery module 105 according to the sixth embodiment, the sulfide batteries 10 and the halogen batteries 20 may be arranged in a row so as to obtain the battery module 105 having the configuration described above.

[0135] (Embodiment 7) FIG. 11 is an explanatory diagram showing a schematic configuration of a vehicle according to the seventh embodiment. The vehicle 160 according to the seventh embodiment is, for example, an electric vehicle. The vehicle 160 includes an electric motor 161, a battery module 162, and wheels 163. The battery module 162 is any one of the battery modules according to the above-described embodiments and modifications. The vehicle 160 may include a plurality of battery modules 162. The battery module 162 supplies power to the electric motor 161, thereby driving the electric motor 161. The electric motor 161 rotates the wheels 163, thereby moving the vehicle 160. The vehicle 160 may be another automobile, such as a hybrid car. The vehicle 160 may also be another vehicle, such as a train, an airplane, or a ship.

[0136] As described above, in this embodiment, the vehicle 160 includes the battery module 162, which includes sulfide-based batteries with excellent output characteristics and halogen-based batteries with high safety. With this configuration, the electric motor 161 is driven by power from the battery module 162, which has an excellent balance between output characteristics and safety, so that people and luggage can be transported safely with excellent output characteristics.

[0137] (Other embodiments) In the battery module of the present disclosure, the sulfide-based battery and the halogen-based battery may have a wound power generating element. The wound power generating element may be plate-shaped or cylindrical. Furthermore, the sulfide-based battery and the halogen-based battery may have a structure in which the wound power generating element is housed in a cylindrical exterior body. The battery module of the present disclosure may also have devices such as a sensor and a controller. Devices other than the battery may be placed in the empty space of the battery case 30.

[0138] In the battery module of the present disclosure, oxide-based batteries or other batteries may be used instead of sulfide-based batteries. Oxide-based batteries or other batteries may be used instead of halogen-based batteries. The characteristics of batteries vary depending on the solid electrolyte used. Batteries using an oxide solid electrolyte as the solid electrolyte have excellent heat resistance. Batteries using, for example, a complex hydride solid electrolyte as the solid electrolyte have excellent lithium ion conductivity. Therefore, with the above configuration, a battery module can be provided that incorporates the advantages of oxide-based batteries or other batteries such as complex hydride solid electrolytes.

[0139] That is, the battery module of the present disclosure may include a first battery case, at least one oxide-based battery or other battery disposed inside the first battery case, and at least one halogen-based battery disposed inside the first battery case. When the battery includes both an oxide-based battery and a halogen-based battery, a battery module can be provided that combines the heat resistance of the oxide-based battery with the safety of the halogen-based battery. When the battery includes a battery containing a complex hydride solid electrolyte as the other battery, a battery module can be provided that combines the lithium ion conductivity of the complex hydride solid electrolyte with the safety of the halogen-based battery. In this way, a battery module incorporating the advantages of oxide-based batteries or other batteries can be provided.

[0140] Furthermore, the battery module of the present disclosure may include a first battery case, at least one sulfide-based battery disposed within the first battery case, and at least one oxide-based battery or other battery disposed within the first battery case. When the battery includes a sulfide-based battery and an oxide-based battery, a battery module can be provided that combines the output characteristics of the sulfide-based battery with the heat resistance of the oxide-based battery. When the battery includes a battery containing a complex hydride solid electrolyte as the other battery, a battery module can be provided that combines the output characteristics of the sulfide-based battery with the lithium ion conductivity of the complex hydride solid electrolyte. In this way, a battery module incorporating the advantages of oxide-based batteries or other batteries can be provided.

[0141] An example of an oxide-based battery is a battery in which the main component of the solid electrolyte contained in the electrolyte layer is an oxide solid electrolyte. "Main component" refers to the component that is contained in the largest amount by mass.

[0142] In the present disclosure, the term "oxide solid electrolyte" refers to a solid electrolyte containing oxygen as a major anion. The oxide solid electrolyte may further contain anions other than sulfur and halogen elements as anions other than oxygen.

[0143] Examples of oxide solid electrolytes include NASICON-type solid electrolytes, such as LiTi2(PO4)3 and its elemental substitution products, (LaLi)TiO3-based perovskite-type solid electrolytes, and Li 14 ZnGeO 16 , Li4SiO4, LiGeO4 and their element-substituted LISICON-type solid electrolytes, Li7La3Zr2O 12 and its element substitution products, Li3PO4 and its N-substituted products, and glasses or glass ceramics based on Li-BO compounds such as LiBO2 and Li3BO3 with the addition of Li2SO4, Li2CO3, etc. One or more oxide solid electrolytes selected from the above materials can be used for the electrolyte layer.

[0144] Other examples of the battery include a battery in which the main component of the solid electrolyte contained in the electrolyte layer is a complex hydride solid electrolyte.

[0145] Examples of complex hydride solid electrolytes include LiBH4-LiI and LiBH4-P2S5.

[0146] In the battery module of the present disclosure, oxide-based batteries and other batteries may be used instead of the sulfide-based batteries and halogen-based batteries. That is, the battery module of the present disclosure may include a first battery case, at least one oxide-based battery disposed inside the first battery case, and at least one other battery disposed inside the first battery case. For example, if the other battery is a battery containing a complex hydride solid electrolyte, a battery module can be provided that combines the heat resistance of an oxide-based battery with the lithium ion conductivity of a complex hydride solid electrolyte. In this way, a battery module can be provided that incorporates the advantages of both oxide-based batteries and other batteries.

[0147] The aspects described in the first to seventh embodiments can be applied to the battery modules described above as other embodiments. [Industrial Applicability]

[0148] The present disclosure is useful as a battery module that has an excellent balance between output characteristics and safety.

Claims

1. a first battery case; At least one sulfide-based battery disposed inside the first battery case; at least one halogen-based battery disposed inside the first battery case; Equipped with the halogen-based battery is a battery containing a halogen-based solid electrolyte, The sulfide-based battery and the halogen-based battery are each shaped like a plate, the at least one halogen-based battery includes a plurality of halogen-based batteries; The sulfide battery and the halogen battery are arranged in a predetermined direction inside the first battery case, The battery module has the halogen-based batteries positioned at both ends in the predetermined direction.

2. The area of ​​the main surface of the halogen-based battery is larger than the area of ​​the main surface of the sulfide-based battery. The battery module according to claim 1 .

3. When the halogen-based battery and the sulfide-based battery are viewed in a plan view from the thickness direction of the halogen-based battery, the entire outer edge of the sulfide-based battery is contained inside the outer edge of the halogen-based battery. The battery module according to claim 1 or 2.

4. The halogen-based battery is in contact with the sulfide-based battery. The battery module according to claim 1 .

5. The at least one sulfide-based battery includes a plurality of sulfide-based batteries. The battery module according to claim 1 .

6. The sulfide-based batteries and the halogen-based batteries are arranged alternately in the predetermined direction inside the first battery case. The battery module according to claim 5 .

7. the sulfide-based battery is disposed in a space surrounded by a main surface of the halogen-based battery and an inner wall of the first battery case; The battery module according to claim 1 .

8. the sulfide-based battery and the halogen-based battery each have a main surface and a side surface, the at least one halogen battery includes a first halogen battery and a second halogen battery; the first halogen-based battery covers a main surface of the sulfide-based battery, the second halogen-based battery covers a side surface of the first halogen-based battery and a side surface of the sulfide-based battery; The battery module according to claim 1 .

9. the sulfide-based battery and the halogen-based battery each have a main surface and a side surface, the at least one halogen battery includes a first halogen battery and a third halogen battery; the first halogen-based battery covers a main surface of the sulfide-based battery, the third halogen-based battery covers a main surface of the sulfide-based battery and a side surface of the sulfide-based battery; The battery module according to claim 1 .

10. the sulfide-based battery and the halogen-based battery each have a main surface and a side surface, the at least one halogen battery includes a first halogen battery and a fourth halogen battery; the first halogen-based battery covers a main surface of the sulfide-based battery, the fourth halogen-based battery covers a side surface of the sulfide-based battery; The battery module according to claim 1 .

11. Further provided is a second battery case made of a flexible packaging material; the sulfide battery and the halogen battery are disposed inside the second battery case so as to share the second battery case; an assembly including the sulfide-based battery, the halogen-based battery, and the second battery case is disposed inside the first battery case; The battery module according to claim 1 .

12. The sulfide-based battery includes an electrolyte solution containing an organic substance. The battery module according to claim 1 .

13. The halogen-based battery does not contain the electrolyte solution. The battery module according to claim 12.

14. The battery module according to any one of claims 1 to 13; an electric motor driven by power from the battery module; A vehicle equipped with:

15. disposing at least one sulfide-based battery within a first battery case; disposing at least one halogen-based battery inside the first battery case; Including, the halogen-based battery is a battery containing a halogen-based solid electrolyte, The sulfide-based battery and the halogen-based battery are each shaped like a plate, the at least one halogen-based battery includes a plurality of halogen-based batteries; a first battery case that is connected to the first battery case and connected to the second battery case; a second battery case that is connected to the first battery case and connected to the second battery case; a first battery case that is connected to the first battery case and connected to the second battery case; a second battery case that is connected to the first battery case; a second battery case that is connected to the second battery case; a third battery case that is connected to the first battery case; a fourth battery case that is connected to the second battery case; a fifth battery case that is connected to the second battery case; a fifth battery case that is connected to the second battery case; a fifth battery case that is connected to the second battery case; a sixth battery case that is connected to the second battery case; a sixth battery case that is connected to the second battery case; a sixth battery case that is connected to the second battery case; a seventh battery case that is connected to the first battery case; a seventh battery case that is connected to the second ...

16. the at least one sulfide-based battery includes a plurality of sulfide-based batteries; In arranging the sulfide-based batteries and the halogen-based batteries, the sulfide-based batteries and the halogen-based batteries are arranged inside the first battery case so that the sulfide-based batteries and the halogen-based batteries are alternately arranged in the predetermined direction. The method for manufacturing a battery module according to claim 15 .

17. Arranging the at least one sulfide-based battery and the at least one halogen-based battery inside a second battery case made of a flexible packaging material so that the second battery case is shared; placing an assembly including the at least one sulfide-based battery, the at least one halogen-based battery, and the second battery case inside the first battery case; The method for manufacturing a battery module according to claim 15 or 16, further comprising:

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