Hydrogen sulfide absorption device

Abstract

To provide a hydrogen sulfide absorbing device capable of efficiently absorbing hydrogen sulfide gas produced in a battery pack with less energy.SOLUTION: A hydrogen sulfide absorbing device includes: a battery pack having an all-solid secondary battery cell; hydrogen sulfide supply means which supplies hydrogen sulfide-containing gas produced in the battery pack to a hydrogen sulfide absorbing part; the hydrogen sulfide absorbing part having a hydrogen sulfide absorber configured to absorb hydrogen sulfide gas contained in the hydrogen sulfide-containing gas; and hydrogen sulfide absorber heating means which heats the hydrogen sulfide absorber using waste heat produced by a waste heat generator.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a hydrogen sulfide absorption device.

Background Art

[0002] In recent years, in order to enable more people to access affordable, reliable, sustainable and advanced energy, research and development on secondary batteries that contribute to energy efficiency have been carried out. In recent years, in secondary batteries, all-solid-state secondary batteries using a solid electrolyte as an electrolyte have attracted attention. Conventionally, some all-solid-state secondary batteries have used a sulfide-based solid electrolyte as the solid electrolyte.

[0003] However, in a battery pack having an all-solid-state secondary battery cell containing a sulfide-based solid electrolyte, the sulfide-based solid electrolyte in the all-solid-state secondary battery cell may react with water to generate hydrogen sulfide gas. When hydrogen sulfide gas is generated, the members provided in the battery pack may be corroded, and the battery pack may deteriorate. Patent Document 1 discloses a battery pack having an adsorbent housing portion in which an adsorbent capable of adsorbing hydrogen sulfide gas is hermetically surrounded by a packaging material.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, in the technology for battery packs containing all-solid-state secondary battery cells, there is a need to more efficiently absorb the hydrogen sulfide gas generated within the battery pack. In particular, battery packs containing all-solid-state secondary battery cells that include sulfide-based solid electrolytes tend to generate hydrogen sulfide gas within the battery pack. Therefore, there is a strong desire to efficiently remove the hydrogen sulfide gas generated within the battery pack.

[0006] Furthermore, in recent years, battery packs containing all-solid-state lithium-sulfur (LiS) secondary battery cells have attracted attention as all-solid-state secondary battery cells. In battery packs containing all-solid-state lithium-sulfur secondary battery cells, even if a solid electrolyte that does not contain sulfide-based solid electrolytes, such as oxide-based solid electrolytes, is used, hydrogen sulfide gas may be generated within the all-solid-state lithium-sulfur secondary battery cell when the sulfur used in the positive electrode combines with the hydrogen contained in the binder.

[0007] The present invention aims to provide a hydrogen sulfide absorption device that can efficiently absorb hydrogen sulfide gas generated in a battery pack with minimal energy consumption, thereby solving the above-mentioned problems. [Means for solving the problem]

[0008] To solve the above problems, the following means are provided.

[0009] [1] A battery pack having all-solid-state secondary battery cells, A hydrogen sulfide supply means for supplying hydrogen sulfide-containing gas generated in the battery pack to a hydrogen sulfide absorption unit, A hydrogen sulfide absorption unit having a hydrogen sulfide absorber that absorbs hydrogen sulfide gas contained in the hydrogen sulfide-containing gas, A hydrogen sulfide absorption device comprising a hydrogen sulfide absorber heating means for heating the hydrogen sulfide absorber with waste heat generated by a waste heat generating device.

[0010] In the hydrogen sulfide absorption device described in [1] above, hydrogen sulfide gas can be absorbed by a heated hydrogen sulfide absorbent, thus efficiently absorbing hydrogen sulfide gas generated within the battery pack. Moreover, in the hydrogen sulfide absorption device described in [1] above, the hydrogen sulfide absorbent is heated by the waste heat generated by the waste heat generating device, so heating can be done with less energy. Therefore, the hydrogen sulfide absorption device described in [1] above contributes to energy efficiency.

[0011] [2] A cooling means for cooling the hydrogen sulfide-removed gas, which includes the hydrogen sulfide-containing gas that has been brought into contact with the hydrogen sulfide absorber, The hydrogen sulfide absorption apparatus according to [1], further comprising a hydrogen sulfide-removed gas supply means for supplying the hydrogen sulfide-removed gas cooled by the cooling means into the battery pack.

[0012] In the hydrogen sulfide absorption device described in [2] above, the hydrogen sulfide-removed gas, cooled by the cooling means, is supplied into the battery pack by the hydrogen sulfide-removed gas supply means. As a result, the inside of the battery pack is cooled, preventing the temperature of the all-solid-state secondary battery cells from becoming too high, enabling efficient charging and discharging of the all-solid-state secondary battery cells, and preventing deterioration of the battery pack. Furthermore, in the hydrogen sulfide absorption device described in [2] above, since cooled hydrogen sulfide-removed gas is supplied into the battery pack, the pressure inside the battery pack is stabilized, and the hydrogen sulfide-containing gas generated inside the battery pack is more easily discharged. Therefore, the gas can be circulated smoothly within the hydrogen sulfide absorption device.

[0013] [3] The hydrogen sulfide absorption apparatus according to [2], further comprising a cooling gas supply means for supplying the hydrogen sulfide-removed gas cooled by the cooling means to the waste heat generating device. In the hydrogen sulfide absorption apparatus described in [3] above, the hydrogen sulfide-removed gas, cooled by the cooling means, is supplied to the heat dissipation device by the cooling gas supply means. This cools the heat dissipation device, preventing it from becoming too hot.

[0014] [4] A hydrogen sulfide absorption apparatus according to any one of [1] to [3], comprising a heater for heating the hydrogen sulfide absorber. In the hydrogen sulfide absorption device described in [4] above, hydrogen sulfide gas can be absorbed by a hydrogen sulfide absorber that has been sufficiently heated using a heater, thus enabling more efficient absorption of hydrogen sulfide gas generated within the battery pack. [Effects of the Invention]

[0015] According to the hydrogen sulfide absorption device of the present invention, hydrogen sulfide gas can be absorbed by a heated hydrogen sulfide absorbent, thus efficiently absorbing hydrogen sulfide gas generated within a battery pack. Moreover, in the hydrogen sulfide absorption device of the present invention, the hydrogen sulfide absorbent is heated by the waste heat generated by the waste heat generating device, so heating can be done with less energy. Therefore, the hydrogen sulfide absorption device of the present invention contributes to energy efficiency. [Brief explanation of the drawing]

[0016] [Figure 1] Figure 1 is a schematic cross-sectional view showing a hydrogen sulfide absorption device according to the first embodiment. [Figure 2] Figure 2(a) is an enlarged view showing a part of the hydrogen sulfide absorption apparatus shown in Figure 1, and Figure 2(b) is a cross-sectional view taken along line AA' shown in Figure 2(a). [Figure 3] Figure 3(a) is a schematic cross-sectional view showing an enlarged portion of the hydrogen sulfide absorption apparatus according to the second embodiment, and Figure 3(b) is a cross-sectional view taken along the line BB' shown in Figure 3(a). [Figure 4] Figure 4(a) is a schematic cross-sectional diagram illustrating another example of a hydrogen sulfide absorption section, and is a cross-sectional view taken perpendicular to the longitudinal direction of the absorber case. Figure 4(b) is a schematic cross-sectional diagram illustrating another example of a hydrogen sulfide absorption section, and is a cross-sectional view taken along the longitudinal direction of the absorber case. [Modes for carrying out the invention]

[0017] In order to solve the above problems, the present inventor has intensively studied by focusing on the relationship between the temperature of a hydrogen sulfide absorber that absorbs hydrogen sulfide gas generated in a battery pack and the adsorption ability of the hydrogen sulfide gas. Generally, the adsorption ability of a hydrogen sulfide absorber for hydrogen sulfide gas is superior when at a high temperature (for example, 80°C or higher) compared to when at room temperature (20°C). Therefore, by heating a hydrogen sulfide absorber that absorbs hydrogen sulfide gas generated in a battery pack, the adsorption ability of the hydrogen sulfide gas can be enhanced.

[0018] However, it is not preferable to consume energy to heat the hydrogen sulfide absorber. Also, providing a heating device such as a heater for heating the hydrogen sulfide absorber may not be preferable from the perspective of miniaturizing a device powered by the battery pack.

[0019] Therefore, the present inventor has repeatedly studied by focusing on the waste heat discharged from auxiliary devices such as a voltage control device provided in a device powered by the battery pack, a motor, and all-solid-state secondary battery cells of the battery pack. As a result, it has been found that the hydrogen sulfide absorber may be heated by utilizing the waste heat generated from any one or more of the above devices, and the present invention has been conceived.

[0020] Hereinafter, the hydrogen sulfide absorption device of the present embodiment will be described in detail with appropriate reference to the drawings. The drawings used in the following description may show, for the sake of convenience, the characteristic portions enlarged in order to make the features of the present invention easier to understand. Therefore, the dimensional ratios of each component may be different from the actual ones. The materials, dimensions, etc. exemplified in the following description are merely examples, and the present invention is not limited thereto, and it can be appropriately changed and implemented without changing the gist thereof.

[0021] [First Embodiment] FIG. 1 is a schematic cross-sectional view showing a hydrogen sulfide absorption device according to the first embodiment. FIG. 2(a) is an enlarged view showing a part of the hydrogen sulfide absorption device shown in FIG. 1. FIG. 2(b) is a cross-sectional view taken along the line A - A' shown in FIG. 2(a). As shown in Figure 1, the hydrogen sulfide absorption device 10 of this embodiment comprises a battery pack 1, a hydrogen sulfide absorption unit 2, a hydrogen sulfide supply means 3, and a hydrogen sulfide absorber heating means 5. The hydrogen sulfide absorption device 10 of this embodiment may also comprise a hydrogen sulfide-removed gas supply means 6, a cooling means 7, and a cooling gas supply means 4, as shown in Figure 1.

[0022] (Battery pack 1) As shown in Figure 1, the battery pack 1 has a plurality of solid-state secondary battery cells 1a and a battery case 1b. In this embodiment, the case in which the battery pack 1 has a plurality of solid-state secondary battery cells 1a is described as an example, but the number of solid-state secondary battery cells 1a is not particularly limited, and there may be only one solid-state secondary battery cell 1a, and the number is appropriately determined according to the application of the battery pack 1.

[0023] As shown in Figure 1, the battery case 1b hermetically houses a plurality of all-solid-state secondary battery cells 1a. The battery case 1b can be made of a conventionally known material, and is preferably made of stainless steel, carbon fiber, resin, or a combination of these materials with iron-based materials, as it is resistant to corrosion by hydrogen sulfide gas.

[0024] The all-solid-state secondary battery cell 1a has a positive electrode layer (not shown), a negative electrode layer (not shown), and a solid electrolyte layer (not shown) sandwiched between the positive electrode layer and the negative electrode layer. The positive electrode layer, negative electrode layer, and solid electrolyte layer can each be made of conventionally known materials and structures, and are appropriately determined according to the application of the battery pack 1. The all-solid-state secondary battery cell 1a may be, for example, an all-solid-state lithium (Li) secondary battery cell or an all-solid-state lithium sulfur (LiS) secondary battery cell.

[0025] In the all-solid-state secondary battery cell 1a shown in Figure 1, one or more of the positive electrode layer, negative electrode layer, and solid electrolyte layer contain a sulfide-based solid electrolyte. Sulfide-based solid electrolytes may generate hydrogen sulfide gas when reacted with water. Therefore, in the hydrogen sulfide absorption device 10 of this embodiment, the effect of absorbing hydrogen sulfide gas generated in the battery pack 1 by the hydrogen sulfide absorber 2a of the hydrogen sulfide absorption section 2 is significant. Conventional known sulfide-based solid electrolytes can be used.

[0026] Furthermore, if the all-solid-state secondary battery cell 1a is an all-solid-state lithium-sulfur secondary battery cell, hydrogen sulfide gas may be generated within the all-solid-state lithium-sulfur secondary battery cell when the sulfur used in the positive electrode combines with the hydrogen contained in the binder. Therefore, if the all-solid-state secondary battery cell 1a is an all-solid-state lithium-sulfur secondary battery cell, the hydrogen sulfide absorber 2a of the hydrogen sulfide absorption device 10 of this embodiment is remarkably effective in absorbing the hydrogen sulfide gas generated within the battery pack 1.

[0027] In this embodiment, the case in which the all-solid-state secondary battery cell 1a contains a sulfide-based solid electrolyte was described as an example. However, the all-solid-state secondary battery cell 1a may not contain a sulfide-based solid electrolyte as the solid electrolyte, and may use a solid electrolyte other than a sulfide-based solid electrolyte, such as an oxide-based solid electrolyte. Conventional known oxide-based solid electrolytes can be used.

[0028] In this embodiment, as shown in Figure 1, a plurality of all-solid-state secondary battery cells 1a are arranged in a substantially horizontal direction. The bottom surface of each all-solid-state secondary battery cell 1a is connected to a hydrogen sulfide pipe 3c. Hydrogen sulfide gas is a gas with a greater mass than air. Therefore, when hydrogen sulfide gas is generated in each all-solid-state secondary battery cell 1a, gravity causes the hydrogen sulfide-containing gas to be discharged from the all-solid-state secondary battery cell 1a into the hydrogen sulfide pipe 3c. Known materials can be used for the hydrogen sulfide pipe 3c, and it is preferable that the material is made of stainless steel, carbon fiber, resin, or a combination of these materials with an iron-based material, as it is a material that is resistant to corrosion by hydrogen sulfide gas.

[0029] (Hydrogen sulfide supply means 3) The hydrogen sulfide supply means 3 supplies hydrogen sulfide-containing gas generated in the all-solid-state secondary battery cell 1a of the battery pack 1 to the hydrogen sulfide absorption unit 2. The hydrogen sulfide supply means 3 includes, for example, a hydrogen sulfide supply pipe 3a and a blower fan 3b provided in the hydrogen sulfide supply pipe 3a.

[0030] As shown in Figure 1, the battery case 1b of the battery pack 1 is connected to the upstream end of the hydrogen sulfide supply pipe 3a where the hydrogen sulfide-containing gas flows in. In this embodiment, as shown in Figure 1, the end of the hydrogen sulfide supply pipe 3a where the hydrogen sulfide-containing gas flows in extends through the battery case 1b of the battery pack 1 into the battery pack 1 and is connected to the hydrogen sulfide pipe 3c. In addition, the hydrogen sulfide absorption section 2 is connected to the downstream end of the hydrogen sulfide supply pipe 3a on the opposite side of where the hydrogen sulfide-containing gas flows in.

[0031] The blower fan 3b moves the hydrogen sulfide-containing gas passing through the hydrogen sulfide supply pipe 3a from the upstream side to the downstream side. There may be only one blower fan 3b, or there may be two or more, as shown in Figure 1. Known materials can be used for the hydrogen sulfide supply piping 3a and the blower fan 3b. Since the hydrogen sulfide supply piping 3a and the blower fan 3b are materials that are resistant to corrosion by hydrogen sulfide gas, it is preferable that they are made of stainless steel, carbon fiber, resin, or a combination of these materials with iron-based materials.

[0032] (Hydrogen sulfide absorption section 2) The hydrogen sulfide absorption unit 2 comprises a hydrogen sulfide absorber 2a that absorbs hydrogen sulfide gas contained in the hydrogen sulfide-containing gas, and an absorber case 2b.

[0033] The absorber case 2b houses the hydrogen sulfide absorber 2a. As shown in Figure 1, the absorber case 2b has a substantially cylindrical shape. As shown in Figures 1 and 2(a), the inner diameter of the absorber case 2b is larger than the inner diameter of the hydrogen sulfide supply pipe 3a. This is to ensure a sufficient surface area for the hydrogen sulfide absorber 2a to come into contact with the hydrogen sulfide-containing gas, thereby allowing the hydrogen sulfide absorber 2a to absorb the hydrogen sulfide gas contained in the gas more efficiently. In this embodiment, the case in which the absorbent case 2b is substantially cylindrical will be described as an example, but the shape of the absorbent case 2b is not limited to substantially cylindrical and can be appropriately determined according to the shape of the hydrogen sulfide absorbent 2a, etc.

[0034] In the absorber case 2b shown in Figure 1, as shown in Figure 2(a), an inlet 2d for introducing hydrogen sulfide-containing gas is provided at one end (upstream side) of the substantially cylindrical longitudinal end, and an outlet 2e for discharging the hydrogen sulfide-containing gas that has passed through the absorber case 2b is provided at the other end (downstream side). The hydrogen sulfide supply pipe 3a of the hydrogen sulfide supply means 3 is connected to the inlet 2d of the absorber case 2b. The hydrogen sulfide-removed gas supply means 6 is connected to the outlet 2e of the absorber case 2b. As for the material of the absorber case 2b, it is preferable to use a material that is resistant to corrosion by hydrogen sulfide gas, such as stainless steel, carbon fiber, resin, or a combination of these materials with iron-based materials.

[0035] In the hydrogen sulfide absorption device 10 of this embodiment, as shown in Figures 2(a) and 2(b), a sheet-shaped hydrogen sulfide absorbent 2a is installed on the entire inner surface of the absorbent case 2b, which has a substantially cylindrical shape. As shown in Figures 2(a) and 2(b), a hollow, linear channel 2c is formed inside the hydrogen sulfide absorbent 2a installed in the absorbent case 2b, along the central axis of the substantially cylindrical shape of the absorbent case 2b, through which the hydrogen sulfide-containing gas flows. Therefore, in the hydrogen sulfide absorption device 10 of this embodiment, the hydrogen sulfide-containing gas that flows into the absorbent case 2b of the hydrogen sulfide absorption section 2 passes through the hydrogen sulfide absorption section 2 while in contact with the hydrogen sulfide absorbent 2a arranged to surround the channel 2c. Furthermore, in the hydrogen sulfide absorption device 10 of this embodiment, a straight channel 2c is formed inside the hydrogen sulfide absorber 2a. Compared to the case where the channel 2c is not straight, the flow velocity of the hydrogen sulfide-containing gas flowing into the hydrogen sulfide absorption section 2 can be increased, allowing it to pass through the hydrogen sulfide absorption section 2 efficiently.

[0036] The material for the hydrogen sulfide absorber 2a can be any material capable of absorbing hydrogen sulfide gas. It may be a material that absorbs hydrogen sulfide gas by physical adsorption, a material that absorbs hydrogen sulfide gas by chemical adsorption, or a material that absorbs hydrogen sulfide gas by both physical and chemical adsorption. Conventionally known materials can be used. Preferably, the material for the hydrogen sulfide absorber 2a is one that absorbs hydrogen sulfide gas by chemical adsorption, or one that absorbs hydrogen sulfide gas by both physical and chemical adsorption. This is because it has good hydrogen sulfide gas adsorption capacity, and the effect of improving the hydrogen sulfide gas adsorption capacity by heating the hydrogen sulfide absorber 2a to a temperature above room temperature (20°C) becomes significant.

[0037] Examples of hydrogen sulfide absorbers 2a that absorb hydrogen sulfide gas by physical adsorption include activated carbon, zeolite, and silica gel. Among these, activated carbon is preferred. This is because activated carbon is readily available and can adsorb and remove not only hydrogen sulfide gas but also unwanted compound components contained in the hydrogen sulfide-containing gas, such as fluoride-based gases derived from binders contained in the all-solid-state secondary battery cell 1a. Examples of hydrogen sulfide absorbers 2a that absorb hydrogen sulfide gas by physical and chemical adsorption include activated carbon on which a metal such as Cu is supported.

[0038] Examples of hydrogen sulfide absorbers 2a that absorb hydrogen sulfide gas by chemical adsorption include alkaline substances such as NaOH, KOH, Ca(OH)2, and Mg(OH)2, metals such as Fe, Cu, and Ag, and oxides of these metals. An example of a metal oxide used as a hydrogen sulfide absorber 2a is iron oxide. When iron oxide is used as the hydrogen sulfide absorber 2a, heating the hydrogen sulfide absorber 2a to 100°C to 250°C allows for even more efficient adsorption of hydrogen sulfide-containing gas.

[0039] A sheet-like hydrogen sulfide absorber 2a can be manufactured, for example, by the method described below. First, a paste is prepared containing a powder made from one of the hydrogen sulfide absorber 2a materials described above and a known binder. The resulting paste is applied to a substrate and dried. This causes the powder particles made from the hydrogen sulfide absorber 2a materials to bond together with the binder, forming a sheet-like hydrogen sulfide absorber 2a. The sheet-like hydrogen sulfide absorber 2a thus obtained may be used after being peeled from the substrate, or it may be used integrated with the substrate.

[0040] A known material can be used for the base material. The base material can be appropriately selected depending on whether the sheet-like hydrogen sulfide absorber 2a is used after being peeled off from the base material or used in an integrated state with the base material. When using a sheet-shaped hydrogen sulfide absorber 2a integrated with a base material, the base material may have multiple through-holes through which hydrogen sulfide-containing gas can pass. In this case, the sheet-shaped hydrogen sulfide absorber 2a integrated with the base material may be installed with the base material side facing the flow path 2c, or with the base material side facing away from the flow path 2c. When using a base material that does not have through-holes through which hydrogen sulfide-containing gas can pass, the base material side of the sheet-shaped hydrogen sulfide absorber 2a should be installed facing away from the flow path 2c.

[0041] The sheet-like hydrogen sulfide absorber 2a may be formed, for example, by applying a paste containing a powder made from one of the hydrogen sulfide absorber 2a materials described above and a known binder to the entire inner surface of the absorber case 2b and then drying it. As a method for applying the paste to the absorber case 2b, known methods such as spraying the paste onto the absorber case 2b using a spraying device can be used.

[0042] (Method 5 for heating hydrogen sulfide absorber) The hydrogen sulfide absorber heating means 5 heats the hydrogen sulfide absorber 2a using the waste heat generated by the waste heat generating device 51. In this embodiment, the hydrogen sulfide absorber heating means 5 generates a high-temperature mixed gas by mixing the waste heat gas heated by the waste heat with the hydrogen sulfide-containing gas, and supplies it to the hydrogen sulfide absorber 2a via the hydrogen sulfide supply pipe 3a.

[0043] Examples of heat-generating equipment 51 that generates waste heat include various devices installed in equipment powered by the battery pack 1. For example, if the equipment powered by the battery pack 1 is a vehicle such as an electric vehicle or a hybrid vehicle, examples of heat-generating equipment 51 installed in the vehicle include auxiliary equipment such as a voltage control device, an onboard charger, a motor control device (power drive unit (PDU)), and a motor. Among these, it is preferable to include a motor as heat-generating equipment 51 because it generates a large amount of waste heat.

[0044] Furthermore, in the hydrogen sulfide absorption device 10 of this embodiment, the all-solid-state secondary battery cell 1a of the battery pack 1 may be used as the heat dissipation device 51. In the hydrogen sulfide absorption apparatus 10 of this embodiment, there may be only one or more waste heat generating devices 51 used to heat the hydrogen sulfide absorber 2a.

[0045] The hydrogen sulfide absorber heating means 5 includes, for example, a heat exhaust supply pipe 5a connecting a heat exhaust generator 51 and a mixing valve 5c, a fan 5b provided in the heat exhaust supply pipe 5a, and a mixing valve 5c that mixes the heat exhaust gas with the hydrogen sulfide-containing gas. As shown in Figure 1, the end of the heat exhaust supply pipe 5a on the side where the heat exhaust gas flows in (upstream side) is supplied with the heat exhaust generated by the heat exhaust generator 51. A known method can be used to supply the heat exhaust generated by the heat exhaust generator 51 to the heat exhaust supply pipe 5a, and this method can be appropriately determined depending on the type of heat exhaust generator 51. Also, as shown in Figure 1, a mixing valve 5c is connected to the end of the heat exhaust supply pipe 5a on the opposite side (downstream side) from where the heat exhaust gas flows in.

[0046] The mixing valve 5c mixes the exhaust heat gas flowing in from the exhaust heat supply pipe 5a with the hydrogen sulfide-containing gas flowing in from the hydrogen sulfide supply pipe 3a in a desired ratio. The mixing ratio of the exhaust heat gas and the hydrogen sulfide-containing gas can be appropriately determined according to the temperatures of the exhaust heat gas and the hydrogen sulfide-containing gas, the concentration of hydrogen sulfide gas contained in the hydrogen sulfide-containing gas, etc. If the hydrogen sulfide-containing gas is heated by the exhaust heat generated by the all-solid-state secondary battery cell 1a, it is not necessary to adjust the mixing valve 5c to mix in the exhaust heat gas flowing in from the exhaust heat supply pipe 5a.

[0047] The mixing valve 5c can be any valve capable of mixing exhaust heat gas and hydrogen sulfide-containing gas in any desired ratio, and known valves can be used. Since the mixing valve 5c is made of a material that is resistant to corrosion by hydrogen sulfide gas, it is preferable to use a material made of stainless steel, carbon fiber, resin, or a combination of these materials with iron-based materials. The blower fan 5b moves the exhaust gas in the exhaust heat supply pipe 5a from the upstream side to the downstream side. There may be only one blower fan 5b, or there may be two or more, as shown in Figure 1. Known components can be used as the heat exhaust supply pipe 5a and the blower fan 5b.

[0048] (Hydrogen sulfide removed gas supply means 6) The hydrogen sulfide-removed gas supply means 6 supplies the hydrogen sulfide-removed gas, which includes hydrogen sulfide-containing gas and waste heat gas that have been brought into contact with the hydrogen sulfide absorber 2a by passing it through the hydrogen sulfide absorption section 2, to the cooling means 7, and supplies the hydrogen sulfide-removed gas cooled by the cooling means 7 into the battery pack 1.

[0049] The hydrogen sulfide-removed gas supply means 6 includes, for example, a hydrogen sulfide-removed gas supply pipe 6a and a blower fan 6b provided in the hydrogen sulfide-removed gas supply pipe 6a. As shown in Figure 1, the outlet 2e of the absorber case 2b of the hydrogen sulfide absorption unit 2 is connected to the upstream end of the hydrogen sulfide-removed gas supply pipe 6a on the side where the hydrogen sulfide-removed gas flows in. The battery pack 1 is connected to the downstream end of the hydrogen sulfide-removed gas supply pipe 6a on the opposite side of the inflow of the hydrogen sulfide-removed gas. In this embodiment, as shown in Figure 1, the downstream end of the hydrogen sulfide-removed gas supply pipe 6a penetrates the battery case 1b of the battery pack 1 and extends into the battery pack 1.

[0050] The blower fan 6b moves the hydrogen sulfide-removed gas in the hydrogen sulfide-removed gas supply pipe 6a from the upstream side to the downstream side. There may be only one blower fan 6b, or there may be two or more, as shown in Figure 1. Known components can be used as the hydrogen sulfide-removed gas supply piping 6a and the blower fan 6b.

[0051] (Cooling means 7) The cooling means 7 cools the hydrogen sulfide-removed gas, including the hydrogen sulfide-containing gas and waste heat gas, which have come into contact with the hydrogen sulfide absorber 2a, by passing it through the hydrogen sulfide absorption section 2. The cooling means 7 shown in Figure 1 has a case arranged to surround the hydrogen sulfide-removed gas supply pipe 6a and a refrigerant circulating within the case. The cooling means 7 cools the outer surface of the hydrogen sulfide-removed gas supply pipe 6a, which is positioned in contact with the cooling means 7. In this way, the hydrogen sulfide-removed gas passing through the hydrogen sulfide-removed gas supply pipe 6a is cooled via the hydrogen sulfide-removed gas supply pipe 6a.

[0052] The cooling means 7 is not limited to those shown in Figure 1. Known cooling means 7 can be used. For example, the cooling means 7 may share a refrigerant with a cooling device that cools various devices provided in a device powered by the battery pack 1, and / or a cooling device that cools the all-solid-state secondary battery cells 1a of the battery pack 1.

[0053] The cooling means 7 shown in Figure 1 may also serve as a cooling device for cooling the all-solid-state secondary battery cells 1a of the battery pack 1 when their temperature becomes too high. Specifically, the all-solid-state secondary battery cells 1a may be cooled by the hydrogen sulfide-removed gas cooled by the cooling means 7.

[0054] (Cooling gas supply means 4) In the hydrogen sulfide absorption device 10 of this embodiment, a cooling gas supply means 4 is provided to supply the hydrogen sulfide-removed gas, cooled by the cooling means 7, to the waste heat generating device 51. Therefore, the cooling means 7 shown in Figure 1 also serves as a cooling device for cooling various components of the device powered by the battery pack 1. The cooling gas supply means 4 includes, for example, a cooling gas supply pipe 4a and a blower fan 4b provided on the cooling gas supply pipe 4a.

[0055] As shown in Figure 1, the hydrogen sulfide-removed gas supply pipe 6a of the hydrogen sulfide-removed gas supply means 6 is connected to the upstream end of the cooling gas supply pipe 4a where the cooled hydrogen sulfide-removed gas flows in. The connection point between the cooling gas supply pipe 4a and the hydrogen sulfide-removed gas supply pipe 6a is located downstream of the location where the cooling means 7 is positioned in the hydrogen sulfide-removed gas supply pipe 6a.

[0056] Furthermore, the cooled hydrogen sulfide-free gas is supplied to the waste heat generating equipment 51 from the end of the cooling gas supply pipe 4a opposite to the side into which the cooled hydrogen sulfide-free gas flows (downstream side). A known method can be used to supply the cooled hydrogen sulfide-free gas to the waste heat generating equipment 51, and this method can be appropriately determined depending on the type of waste heat generating equipment 51.

[0057] The blower fan 4b moves the cooled, hydrogen sulfide-removed gas in the cooling gas supply pipe 4a from the upstream side to the downstream side. There may be only one blower fan 4b, or there may be two or more, as shown in Figure 1. Known components can be used as the cooling gas supply pipe 4a and the blower fan 4b.

[0058] (Method for absorbing hydrogen sulfide) Next, an example will be given illustrating a method for absorbing and removing hydrogen sulfide gas from hydrogen sulfide-containing gas generated in a battery pack using the hydrogen sulfide absorption device 10 of this embodiment. In the hydrogen sulfide absorption device 10 shown in Figure 1, the all-solid-state secondary battery cell 1a of the battery pack 1 contains a sulfide-based solid electrolyte. Therefore, if water enters the all-solid-state secondary battery cell 1a, the sulfide-based solid electrolyte and water may react, generating hydrogen sulfide gas.

[0059] When hydrogen sulfide gas is generated within the all-solid-state secondary battery cell 1a, the hydrogen sulfide-containing gas, which has a greater mass than air, flows into the hydrogen sulfide pipes 3c connected to the bottom surface of each all-solid-state secondary battery cell 1a by gravity, as shown in Figure 1.

[0060] The all-solid-state secondary battery cell 1a may generate heat during charging and discharging. When hydrogen sulfide gas is generated while the all-solid-state secondary battery cell 1a is generating heat, the waste heat generated by the all-solid-state secondary battery cell 1a heats the hydrogen sulfide-containing gas flowing into the hydrogen sulfide piping 3c. The heated hydrogen sulfide-containing gas heats the hydrogen sulfide absorber 2a as it passes through the hydrogen sulfide absorption section 2. Therefore, the all-solid-state secondary battery cell 1a may function as a waste heat generating device 51.

[0061] Furthermore, when the all-solid-state secondary battery cell 1a is generating heat, hydrogen sulfide gas is likely to be generated within the all-solid-state secondary battery cell 1a. In particular, when the temperature of the all-solid-state secondary battery cell 1a is 80°C or higher, the amount of hydrogen sulfide gas generated within the all-solid-state secondary battery cell 1a tends to increase. Therefore, when the hydrogen sulfide absorber 2a is heated by the waste heat generated by the all-solid-state secondary battery cell 1a, the effect of efficiently absorbing hydrogen sulfide gas with the heated hydrogen sulfide absorber 2a becomes even more pronounced.

[0062] The hydrogen sulfide-containing gas that flows into the hydrogen sulfide pipe 3c is sent to the mixing valve 5c via the hydrogen sulfide supply pipe 3a by a blower fan 3b installed in the hydrogen sulfide supply pipe 3a of the hydrogen sulfide supply means 3. Furthermore, in this embodiment, the exhaust heat gas heated by the exhaust heat generated by the exhaust heat generating device 51 is sent to the mixing valve 5c via the exhaust heat supply pipe 5a by a blower fan 5b provided in the exhaust heat supply pipe 5a of the hydrogen sulfide absorber heating means 5.

[0063] Then, as shown in Figures 1 and 2(a), the hydrogen sulfide-containing gas flowing in from the hydrogen sulfide supply pipe 3a and the exhaust heat gas flowing in from the exhaust heat supply pipe 5a are mixed by the mixing valve 5c. The mixed gas of hydrogen sulfide-containing gas and exhaust heat gas mixed by the mixing valve 5c is sent to the inlet 2d of the absorber case 2b of the hydrogen sulfide absorption unit 2 via the hydrogen sulfide supply pipe 3a. If the exhaust heat gas flowing in from the exhaust heat supply pipe 5a is at a higher temperature than the hydrogen sulfide-containing gas sent to the mixing valve 5c, the temperature of the mixed gas of hydrogen sulfide-containing gas and exhaust heat gas will be higher than the temperature of the hydrogen sulfide-containing gas.

[0064] The mixed gas of hydrogen sulfide-containing gas and waste heat gas that flows into the absorber case 2b from the inlet 2d passes through the hydrogen sulfide absorption section 2 while coming into contact with the hydrogen sulfide absorber 2a, which is arranged to surround the flow path 2c. As a result, the hydrogen sulfide contained in the hydrogen sulfide-containing gas is absorbed by the hydrogen sulfide absorber 2a.

[0065] The hydrogen sulfide-removed gas, which consists of a mixture of hydrogen sulfide-containing gas and waste heat gas that has been in contact with the hydrogen sulfide absorber 2a, is discharged from the outlet 2e of the absorber case 2b of the hydrogen sulfide absorption unit 2 and flows into the hydrogen sulfide-removed gas supply pipe 6a of the hydrogen sulfide-removed gas supply means 6. The hydrogen sulfide-removed gas that flows into the hydrogen sulfide-removed gas supply pipe 6a is supplied to the cooling means 7 by a blower fan 6b provided in the hydrogen sulfide-removed gas supply pipe 6a.

[0066] The hydrogen sulfide-removed gas supplied to the cooling means 7 is cooled by the cooling means 7 via the hydrogen sulfide-removed gas supply pipe 6a. The hydrogen sulfide-removed gas cooled by the cooling means 7 is supplied into the battery pack 1 by the blower fan 6b. This cools the inside of the battery pack 1, preventing the temperature of the all-solid-state secondary battery cells 1a from becoming too high, enabling efficient charging and discharging of the all-solid-state secondary battery cells 1a, and preventing deterioration of the battery pack. Furthermore, in the hydrogen sulfide absorption device 10 of this embodiment, since the hydrogen sulfide-removed gas cooled by the cooling means 7 is supplied into the battery pack 1, the pressure inside the battery pack 1 is stabilized, and the hydrogen sulfide-containing gas generated inside the battery pack 1 is more easily discharged into the hydrogen sulfide pipe 3c. Therefore, the gas can be circulated smoothly within the hydrogen sulfide absorption device 10.

[0067] Furthermore, in the hydrogen sulfide absorption device 10 of this embodiment, a portion of the hydrogen sulfide-removed gas cooled by the cooling means 7 is supplied to the waste heat generating device 51. Specifically, as shown in Figure 1, a portion of the hydrogen sulfide-removed gas cooled by the cooling means 7 is sent to a cooling gas supply pipe 4a which is connected to a position downstream of the location where the cooling means 7 is located in the hydrogen sulfide-removed gas supply pipe 6a. The hydrogen sulfide-removed gas sent to the cooling gas supply pipe 4a is supplied to the waste heat generating device 51 by a blower fan 4b. This cools the waste heat generating device 51 and prevents its temperature from becoming too high.

[0068] The hydrogen sulfide absorption device 10 of this embodiment includes a hydrogen sulfide supply means 3 that supplies hydrogen sulfide-containing gas generated in the battery pack 1 to a hydrogen sulfide absorption unit 2, a hydrogen sulfide absorption unit 2 having a hydrogen sulfide absorber 2a that absorbs hydrogen sulfide gas contained in the hydrogen sulfide-containing gas, and a hydrogen sulfide absorber heating means 5 that heats the hydrogen sulfide absorber 2a with waste heat generated by a waste heat generating device 51. Therefore, according to the hydrogen sulfide absorption device 10 of this embodiment, hydrogen sulfide gas can be absorbed by the heated hydrogen sulfide absorber 2a, and hydrogen sulfide gas generated in the battery pack 1 can be absorbed efficiently. Moreover, in the hydrogen sulfide absorption device 10 of this embodiment, the hydrogen sulfide absorber 2a is heated by waste heat generated by the waste heat generating device 51, so heating can be done with less energy. Therefore, the hydrogen sulfide absorption device 10 of this embodiment contributes to energy efficiency. Furthermore, the hydrogen sulfide absorption device 10 of this embodiment is equipped with a hydrogen sulfide absorber heating means 5 that heats the hydrogen sulfide absorber 2a using the waste heat generated by the waste heat generating device 51, so there is no need to newly install a heating device such as a heater to heat the hydrogen sulfide absorber 2a.

[0069] In this embodiment, the hydrogen sulfide absorption device 10 was described using the example shown in Figure 1, which includes a hydrogen sulfide-removed gas supply means 6, a cooling means 7, and a cooling gas supply means 4. However, the hydrogen sulfide-removed gas supply means 6, the cooling means 7, and the cooling gas supply means 4 are optional and may be omitted.

[0070] [Second Embodiment] Figure 3(a) is a schematic cross-sectional view showing an enlarged portion of the hydrogen sulfide absorption apparatus according to the second embodiment. Figure 3(b) is a cross-sectional view taken along the line BB' shown in Figure 3(a). In the hydrogen sulfide absorption device 20 according to the second embodiment, the same reference numerals are used for the same components as in the hydrogen sulfide absorption device 10 according to the first embodiment described above, and their descriptions are omitted. The only differences between the hydrogen sulfide absorption device 20 according to the second embodiment and the hydrogen sulfide absorption device 10 according to the first embodiment are the absence of the cooling gas supply means 4 shown in Figure 1 of the hydrogen sulfide absorption device 10, and the shape of the hydrogen sulfide absorber heating means.

[0071] (Hydrogen sulfide absorber heating means 50) As shown in Figures 3(a) and 3(b), the hydrogen sulfide absorber heating means 50 in this embodiment includes, for example, a main body 50f, a heat exhaust supply pipe 50a connecting a hollow space 50c provided inside the main body 50f to a heat exhaust generating device 51, a blower fan 50b provided on the heat exhaust supply pipe 50a, a protrusion 50e formed on the inner wall surface on the side in contact with the absorber case 2b in the space 50c, and a heat exhaust pipe 50d for exhausting heat gas from the space 50c inside the main body 50f.

[0072] As shown in Figures 3(a) and 3(b), the main body 50f of the hydrogen sulfide absorber heating means 50 has a substantially cylindrical shape. The main body 50f is made of a material with good thermal conductivity, such as metal. The main body 50f is provided with an absorber case installation area 50g, which is a substantially cylindrical space along the central axis having an inner diameter corresponding to the outer diameter of the absorber case 2b. In this embodiment, the absorber case 2b is installed in the absorber case installation area 50g, and the inner wall surface of the absorber case installation area 50g and the outer surface of the absorber case 2b are in contact with each other.

[0073] An annular space 50c is formed inside the main body 50f. As shown in Figure 3(a), a plurality of protrusions 50e are formed on the inner wall surface of the space 50c that is in contact with the absorber case 2b. The protrusions 50e function as heat sinks, increasing the contact area between the exhaust heat gas moving within the space 50c and the main body 50f, thereby efficiently heating the absorber case 2b.

[0074] The end of the heat exhaust supply pipe 50a on the side where the heat exhaust gas flows in (upstream side) is supplied with heat exhaust generated by the heat exhaust generator 51 (see Figure 1; not shown in Figures 3(a) and 3(b)). The end of the heat exhaust supply pipe 50a on the opposite side (downstream side) from where the heat exhaust gas flows in is connected to the space 50c inside the main body 50f. The blower fan 50b moves the exhaust gas in the exhaust heat supply pipe 5a from the upstream side to the downstream side. There may be only one blower fan 50b or there may be two or more, as shown in Figure 3(a).

[0075] The end of the heat exhaust pipe 50d is connected to a space 50c within the main body 50f, and the heat exhaust gas that has passed through the space 50c flows into it. The end of the heat exhaust pipe 50d opposite to the side (downstream) where the heat exhaust gas flows in may be connected to a cooling device or may be open to the outside. Known components can be used as the heat exhaust supply pipe 50a, the heat exhaust discharge pipe 50d, and the blower fan 50b.

[0076] In this embodiment, the hydrogen sulfide absorber heating means 50 heats the hydrogen sulfide absorber 2a using waste heat generated by the waste heat generating device 51 (see Figure 1), similar to the hydrogen sulfide absorber heating means 5 in the first embodiment. However, unlike the hydrogen sulfide absorber heating means 5 in the first embodiment, the hydrogen sulfide absorber heating means 50 heats the hydrogen sulfide absorber 2a via the absorber case 2b of the hydrogen sulfide absorption section 2 using waste heat gas heated by the waste heat. Therefore, in the hydrogen sulfide absorption device 20 of this embodiment, the waste heat gas is not mixed with the hydrogen sulfide-containing gas and does not come into contact with the components inside the battery pack 1. Consequently, in this embodiment, even if the waste heat gas contains contaminants such as iron powder originating from the waste heat generating device 51 such as a motor, the contaminants do not enter the battery pack 1. Therefore, malfunctions such as short circuits caused by the entry of contaminants into the battery pack 1 do not occur.

[0077] (Method for absorbing hydrogen sulfide) Next, an example will be given of a method for absorbing and removing hydrogen sulfide gas from the hydrogen sulfide-containing gas generated in the battery pack 1 using the hydrogen sulfide absorption device 20 of this embodiment.

[0078] In the hydrogen sulfide absorption device 20 of this embodiment, the exhaust heat gas heated by the exhaust heat generated by the exhaust heat generating device 51 is sent to the space 50c inside the main body 50f via the exhaust heat supply pipe 50a by a blower fan 50b provided in the exhaust heat supply pipe 50a of the hydrogen sulfide absorber heating means 50. The exhaust heat gas sent to the space 50c moves within the space 50c, heating the absorber case 2b via the inner wall surface on the side in contact with the absorber case 2b in the space 50c, and is then discharged via the exhaust heat discharge pipe 50d.

[0079] In the hydrogen sulfide absorption device 20 of this embodiment, when hydrogen sulfide gas is generated in the all-solid-state secondary battery cell 1a, it flows into the hydrogen sulfide piping 3c, similar to the first embodiment. The hydrogen sulfide-containing gas flowing into the hydrogen sulfide pipe 3c is sent to the inlet 2d of the absorber case 2b of the hydrogen sulfide absorption unit 2 by a blower fan 3b installed in the hydrogen sulfide supply pipe 3a of the hydrogen sulfide supply means 3. The hydrogen sulfide-containing gas flowing into the absorber case 2b from the inlet 2d passes through the hydrogen sulfide absorption unit 2 while in contact with the hydrogen sulfide absorber 2a, which has been heated by the exhaust heat gas sent to the space 50c of the hydrogen sulfide absorber heating means 50. As a result, the hydrogen sulfide contained in the hydrogen sulfide-containing gas is absorbed by the hydrogen sulfide absorber 2a.

[0080] The hydrogen sulfide-removed gas, which consists of hydrogen sulfide-containing gas that has been in contact with the hydrogen sulfide absorber 2a, is discharged from the outlet 2e of the absorber case 2b of the hydrogen sulfide absorption unit 2 and, as in the first embodiment, flows into the hydrogen sulfide-removed gas supply pipe 6a of the hydrogen sulfide-removed gas supply means 6, where it is cooled by the cooling means 7 via the hydrogen sulfide-removed gas supply pipe 6a. The hydrogen sulfide-removed gas cooled by the cooling means 7 is supplied into the battery pack 1 by the blower fan 6b.

[0081] The hydrogen sulfide absorption device 20 of this embodiment includes a hydrogen sulfide supply means 3 that supplies hydrogen sulfide-containing gas generated in the battery pack 1 to a hydrogen sulfide absorption unit 2, a hydrogen sulfide absorption unit 2 having a hydrogen sulfide absorber 2a that absorbs hydrogen sulfide gas contained in the hydrogen sulfide-containing gas, and a hydrogen sulfide absorber heating means 50 that heats the hydrogen sulfide absorber 2a with waste heat generated by a waste heat generating device 51. Therefore, according to the hydrogen sulfide absorption device 20 of this embodiment, hydrogen sulfide gas can be absorbed by the heated hydrogen sulfide absorber 2a, and hydrogen sulfide gas generated in the battery pack 1 can be absorbed efficiently. Moreover, in the hydrogen sulfide absorption device 20 of this embodiment, the hydrogen sulfide absorber 2a is heated by waste heat generated by the waste heat generating device 51, so heating can be done with less energy. Therefore, the hydrogen sulfide absorption device 20 of this embodiment contributes to energy efficiency.

[0082] In this embodiment, the hydrogen sulfide absorption device 20 has been described using as an example a case in which a hydrogen sulfide-removed gas supply means 6 and a cooling means 7 are included. However, the hydrogen sulfide-removed gas supply means 6 and the cooling means 7 are provided as needed and may not be required.

[0083] (Other examples) The hydrogen sulfide absorption apparatus of the present invention is not limited to the hydrogen sulfide absorption apparatus of the embodiment described above. For example, the shape of the hydrogen sulfide absorber 2a in the hydrogen sulfide absorption section 2 is not particularly limited. Figure 4(a) is a schematic cross-sectional view illustrating another example of the hydrogen sulfide absorption section, and is a cross-sectional view taken from a direction perpendicular to the longitudinal direction of the absorber case.

[0084] As shown in Figure 4(a), multiple annular hydrogen sulfide absorbers 21a, each having a hollow channel 21c in the center, may be arranged within the absorber case 2b, extending along the length of the absorber case 2b. The annular hydrogen sulfide absorbers 21a may have a roughly circular cross-sectional shape, as shown in Figure 4(a), or they may have a polygonal shape such as a roughly triangular or quadrilateral cross-section. Furthermore, the number of annular hydrogen sulfide absorbers 21a is not particularly limited.

[0085] Furthermore, the shape of the absorber case 21b in the hydrogen sulfide absorption section 2 is not limited to a cylindrical shape, nor is the shape of the flow path 2c limited to a straight line. Figure 4(b) is a schematic cross-sectional view illustrating another example of the hydrogen sulfide absorption section, and is a cross-sectional view taken from the longitudinal direction of the absorber case.

[0086] The absorber case 21b shown in Figure 4(b) has a roughly rectangular cylindrical shape. Inside the absorber case 21b, a bellows-shaped channel 21c is formed, surrounded by a hydrogen sulfide absorber 22a. Compared to a straight channel, the bellows-shaped channel 21c allows the hydrogen sulfide-containing gas to travel a longer distance within the absorber case 21b. The larger the surface area of ​​the hydrogen sulfide adsorbent 22a in contact with the hydrogen sulfide-containing gas, the greater the amount of hydrogen sulfide gas absorbed by the hydrogen sulfide absorber 22a. Therefore, when the absorber case 21b shown in Figure 4(b) is provided, hydrogen sulfide gas generated in the battery pack 1 can be absorbed more efficiently compared to when the absorber case 2b shown in Figures 2(a) and 2(b) is provided. The shape of the absorber case may be a roughly triangular tube, a roughly hexagonal tube, or the like. Furthermore, the flow path may have a shape with a labyrinth coefficient.

[0087] Furthermore, although the above-described embodiment explained using a sheet-like hydrogen sulfide absorbent 2a as an example, the hydrogen sulfide absorbent 2a is not limited to a sheet-like form and may be in powder form. When the hydrogen sulfide absorbent 2a is in powder form, unlike the examples shown in Figures 2(a) and 2(b), a hollow channel 2c is not formed inside the hydrogen sulfide absorbent 2a installed in the absorbent case 2b. When the hydrogen sulfide absorbent 2a is in powder form, the hydrogen sulfide absorbent 2a fills the entire absorbent case 2b of the hydrogen sulfide absorption unit 2. Then, unlike the examples shown in Figures 2(a) and 2(b), the hydrogen sulfide-containing gas that flows into the absorbent case 2b of the hydrogen sulfide absorption unit 2 passes through the gaps between the powdered hydrogen sulfide absorbent 2a while in contact with the hydrogen sulfide absorbent 2a. Therefore, when the hydrogen sulfide absorber 2a is in powder form, the volume of the hydrogen sulfide absorber 2a that comes into contact with the hydrogen sulfide-containing gas flowing into the same absorber case 2b is larger compared to when it is in sheet form. In other words, the amount of hydrogen sulfide gas that can be absorbed by the hydrogen sulfide absorber 2a can be increased.

[0088] Furthermore, the hydrogen sulfide absorber 2a may be a solution containing one or more substances selected from alkaline substances such as NaOH, KOH, Ca(OH)2, and Mg(OH)2, metals such as Fe, Cu, and Ag, and oxides of these metals. It is preferable to use an aqueous copper nitrate solution as the above-mentioned solution used as the hydrogen sulfide absorber 2a. When the hydrogen sulfide absorber 2a is a solution, a hollow channel 2c is not formed inside the hydrogen sulfide absorber 2a placed in the absorber case 2b, similar to the case where the hydrogen sulfide absorber 2a is in powder form. When the hydrogen sulfide absorber 2a is a solution, a hydrogen sulfide-containing gas is supplied into the solution of the hydrogen sulfide absorber 2a filled in the absorber case 2b, and the gas passes through the solution of the hydrogen sulfide absorber 2a while in contact with the hydrogen sulfide absorber 2a.

[0089] Furthermore, the hydrogen sulfide absorption device of the present invention may also include a battery cell heating means that heats the all-solid-state secondary battery cells 1a in the battery pack 1 with the waste heat generated by the waste heat generating device 51. Specifically, for example, waste heat gas can be supplied into the battery pack 1 via the waste heat supply pipe 5a of the hydrogen sulfide absorber heating means 5 in the first embodiment, or via the waste heat supply pipe 50a of the hydrogen sulfide absorber heating means 50 in the second embodiment. Such a hydrogen sulfide absorption device can prevent the temperature of the all-solid-state secondary battery cells in the battery pack 1 from being too low, which would result in insufficient charge and discharge efficiency, and enables efficient charging and discharging of the all-solid-state secondary battery cells 1a.

[0090] Furthermore, the hydrogen sulfide absorption device of the present invention may also be equipped with a heater for heating the hydrogen sulfide absorbent. Known heaters can be used. In a hydrogen sulfide absorption device equipped with a heater for heating the hydrogen sulfide absorbent, hydrogen sulfide gas can be absorbed by the hydrogen sulfide absorbent, which has been sufficiently heated by the heater. Therefore, hydrogen sulfide gas generated within the battery pack can be absorbed more efficiently. [Explanation of symbols]

[0091] 10, 20…Hydrogen sulfide absorption device, 1…Battery pack, 1a…All-solid-state secondary battery cell, 1b…Battery case, 2…Hydrogen sulfide absorption section, 2a…Hydrogen sulfide absorber, 2b…Absorber case, 2c…Flow channel, 2d…Inlet, 2e…Outlet, 3…Hydrogen sulfide supply means, 3a…Hydrogen sulfide supply piping, 3b…Blower fan, 3c…Hydrogen sulfide piping, 4…Cooling gas supply means, 4a…Cooling gas supply piping, 4b…Blower fan 5, 50... means for heating the hydrogen sulfide absorber, 5a... exhaust heat supply piping, 5b... blower fan, 5c... mixing valve, 6... means for supplying hydrogen sulfide-removed gas, 6a... pipe for supplying hydrogen sulfide-removed gas, 6b... blower fan, 7... cooling means, 50a... exhaust heat supply piping, 50b... blower fan, 50c... space, 50d... exhaust heat discharge piping, 50e... protrusion, 50f... main body, 50g... absorber case installation area, 51... exhaust heat generating equipment.

Claims

1. A battery pack having all-solid-state secondary battery cells, A hydrogen sulfide supply means for supplying hydrogen sulfide-containing gas generated in the battery pack to a hydrogen sulfide absorption unit, A hydrogen sulfide absorption unit having a hydrogen sulfide absorber that absorbs hydrogen sulfide gas contained in the hydrogen sulfide-containing gas, A hydrogen sulfide absorption device comprising a device powered by the aforementioned battery pack as a heat dissipation device, and a hydrogen sulfide absorber heating means for heating the hydrogen sulfide absorber with the heat generated by the heat dissipation device.

2. The hydrogen sulfide absorption apparatus according to claim 1, wherein the heat dissipation device is a voltage control device, an onboard charger, a control device for controlling a motor, or a motor, all of which are provided in the vehicle.

3. A cooling means for cooling the hydrogen-free gas containing the hydrogen-sulfide gas that has been brought into contact with the hydrogen-sulfide absorber, The hydrogen sulfide absorption apparatus according to claim 1, further comprising a hydrogen sulfide-removed gas supply means for supplying the hydrogen sulfide-removed gas, cooled by the cooling means, into the battery pack.

4. The hydrogen sulfide absorption apparatus according to claim 3, further comprising a cooling gas supply means for supplying the hydrogen sulfide-removed gas, cooled by the cooling means, to the waste heat generating device.

5. A hydrogen sulfide absorption apparatus according to any one of claims 1 to 4, comprising a heater for heating the hydrogen sulfide absorber.

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