Electricity storage device

Abstract

The utility model provides an electrical storage device capable of inhibiting blockage of a discharge part. A power storage device is provided with a plurality of power storage units, a case for housing the plurality of power storage units, and a desulfurization unit disposed in the case, the case including a ceiling wall disposed above the plurality of power storage units, the ceiling wall having a discharge part for discharging gas inside the case to the outside of the case, and the desulfurization unit being disposed in the case. The desulfurization unit has a desulfurization agent and a communication path that accommodates the desulfurization agent and communicates the inside of the housing with the discharge part. The communication path has: a discharge-side vertical path that extends downward from the discharge part; a support path that horizontally extends from the lower end of the discharge-side vertical path and supports the desulfurizing agent; and a suction-side vertical path that extends upward from the end of the support path and opens in the housing.

Description

Technical Field

[0001] The utility model relates to an electricity storage device. Background Art

[0002] For example, Japanese Patent Gazette No. 2021-197221 discloses an all-solid-state battery pack, which includes a plurality of all-solid-state batteries, a frame for accommodating the plurality of all-solid-state batteries, an intake mechanism for introducing gas from outside the frame into the frame, and an exhaust mechanism for exhausting the gas in the frame to the outside of the frame.

[0003] In the all-solid battery pack described in Japanese Patent Application Laid-Open No. 2021-197221, a desulfurizing agent may be used to remove hydrogen sulfide contained in the gas in the frame. In this case, if the desulfurizing agent is broken due to vibration or the like, it may clog the discharge portion. Utility Model Content

[0004] An object of the present invention is to provide an electric storage device capable of suppressing clogging of a discharge portion.

[0005] According to the first embodiment of the utility model, the power storage device comprises: a plurality of power storage cells; a shell for accommodating the plurality of power storage cells; and a desulfurization unit arranged in the shell, the shell including a top wall arranged above the plurality of power storage cells, the top wall having a discharge portion for discharging the gas in the shell to the outside of the shell, the desulfurization unit having: a desulfurizer; and a connecting path for accommodating the desulfurizer and connecting the inside of the shell with the discharge portion, the connecting path having: a discharge side up-and-down path extending downward from the discharge portion; a supporting path extending horizontally from the lower end of the discharge side up-and-down path and supporting the desulfurizer; and a suction side up-and-down path extending upward from the end of the supporting path and opening in the shell.

[0006] In this power storage device, since the desulfurizer is supported on the horizontally extending support path, even if the desulfurizer is broken due to vibration or the like, air permeability between the housing and the discharge portion can be ensured through the upper space in the support path. Therefore, clogging of the discharge portion can be suppressed.

[0007] In addition, the connecting path is connected to the top wall and is arranged in the upper space of the shell where the concentration of hydrogen sulfide gas is relatively low. Therefore, even if hydrogen sulfide gas is generated in the shell, it is possible to prevent high-concentration hydrogen sulfide gas from entering the desulfurization unit or insufficient desulfurization in the desulfurization unit.

[0008] According to the power storage device of the second aspect of the present invention, in the power storage device of the first aspect, the discharge portion may be formed of a pressure regulating valve that regulates the pressure in the case.

[0009] According to the third-type power storage device of the utility model, in the second-type power storage device, the desulfurization unit may also have: a discharge side retaining plate connected to the upper end of the discharge side up and down path; a suction side retaining plate connected to the upper end of the suction side up and down path; a discharge side filter retained by the discharge side retaining plate; and a suction side filter retained by the suction side retaining plate, the discharge side retaining plate retaining the discharge side filter in a manner that the discharge side filter is arranged between the pressure regulating valve and the discharge side up and down path.

[0010] According to the fourth mode of the storage device of the utility model, in the storage device of any one of the first mode to the third mode, the support path may have: a first path, which extends from the lower end of the upper and lower paths on the discharge side in a first direction orthogonal to the up and down direction; a second path, which extends from the lower end of the upper and lower paths on the suction side in the first direction; and a third path, which connects the first path and the second path, and the third path has a shape extending along the second direction orthogonal to both the up and down direction and the first direction.

[0011] According to the present invention, it is possible to provide an electricity storage device capable of suppressing clogging of a discharge portion.

[0012] It should be understood by those skilled in the art that the exemplary embodiments described below are examples of the above-described embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a perspective view schematically showing a power storage device in one embodiment of the present invention.

[0014] Figure 2 The figure is a top view schematically showing a desulfurization unit.

[0015] Figure 3 for Figure 2 Cross-sectional view at line III-III in FIG. DETAILED DESCRIPTION

[0016] The embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings referred to below, the same or corresponding components are denoted by the same reference numerals.

[0017] Figure 1 1 is a perspective view schematically showing an electric storage device 1 in one embodiment of the present invention. The electric storage device 1 is preferably mounted on a vehicle. Figure 2 The figure is a top view schematically showing the desulfurization unit 300 . Figure 3 for Figure 2 Cross-sectional view at line III-III in FIG.

[0018] like Figures 1 to 3As shown, the power storage device 1 includes a plurality of power storage cells 100 , a case 200 , and a desulfurization unit 300 disposed in the case 200 .

[0019] A plurality of power storage cells 100 are arranged so as to be aligned in one direction (eg, the width direction of the vehicle). Each power storage cell 100 may be, for example, a lithium-ion battery. Each power storage cell 100 is formed in a flat rectangular parallelepiped.

[0020] The housing 200 accommodates a plurality of storage cells 100. The housing 200 includes a lower housing 210 opened at the top, and an upper cover 220 accommodating the plurality of storage cells 100 together with the lower housing 210. The upper cover 220 includes a top wall 222 disposed above the plurality of storage cells 100. The top wall 222 includes a discharge portion 224 for discharging the gas (including hydrogen sulfide gas) in the housing 200 to the outside of the housing 200. The discharge portion 224 is composed of a pressure regulating valve (so-called breathing membrane).

[0021] The desulfurization unit 300 removes sulfur-based components from the gas in the housing 200. The desulfurization unit 300 includes a desulfurizing agent 310, a communication path 320, a discharge side retaining plate 331, a suction side retaining plate 332, a discharge side filter 341, and a suction side filter 342.

[0022] The desulfurizing agent 310 is formed in a pellet shape.

[0023] The communication path 320 accommodates the desulfurizing agent 310 and communicates the inside of the housing 200 with the discharge portion 224. The communication path 320 includes a discharge-side up-and-down path 321, a support path 322, and a suction-side up-and-down path 323.

[0024] The discharge-side up-and-down path 321 extends downward from the discharge portion 224 .

[0025] The support path 322 extends horizontally from the lower end of the discharge-side up-and-down path 321 . The support path 322 supports the desulfurizing agent 310 .

[0026] The suction side up-down path 323 extends upward from the end of the support path 322. The upper end of the suction side up-down path 323 opens in the housing 200. The upper end of the suction side up-down path 323 is located at a position spaced downward from the top wall 222.

[0027] like Figure 2 As shown, the support path 322 has a first path 322a, a second path 322b, and a third path 322c.

[0028] The first path 322a extends from the lower end of the discharge side vertical path 321 in a first direction ( Figure 2In the present embodiment, the first path 322a extends in a direction approaching the suction side up-and-down path 323 in the first direction.

[0029] The second path 322b extends in the first direction from the lower end of the suction-side up-and-down path 323. In the present embodiment, the second path 322b extends in the first direction toward the direction approaching the discharge-side up-and-down path 321.

[0030] The third path 322c connects the first path 322a and the second path 322b. The third path 322c has a second direction ( Figure 2 The desulfurizing agent 310 is arranged in the third path 322c.

[0031] The discharge side retaining plate 331 is connected to the upper end of the discharge side vertical path 321. The discharge side filter 341 is retained on the discharge side retaining plate 331. Figure 3 As shown, the discharge-side retaining plate 331 retains the discharge-side filter 341 so as to arrange the discharge-side filter 341 between the discharge portion 224 (ie, the pressure regulating valve) and the discharge-side up-and-down path 321 .

[0032] The suction side holding plate 332 is connected to the upper end of the suction side vertical path 323. The suction side filter 342 is held on the suction side holding plate 332. The suction side holding plate 332 holds the suction side filter 342 so that the suction side filter 342 is arranged at a position spaced apart from the top wall 222.

[0033] As described above, in the power storage device 1 of the present embodiment, the desulfurizing agent 310 is supported by the horizontally extending support path 322, so even if the desulfurizing agent 310 is broken due to vibration or the like, air permeability between the inside of the housing 200 and the discharge portion 224 can be ensured through the upper space in the support path 322. Therefore, clogging of the discharge portion 224 can be suppressed.

[0034] In addition, the connecting path 320 is connected to the top wall 222 and is arranged in the upper space of the shell 200 where the concentration of hydrogen sulfide gas is relatively reduced. Therefore, even if hydrogen sulfide gas is generated in the shell 200, it is possible to prevent high-concentration hydrogen sulfide gas from entering the desulfurization unit 300 or insufficient desulfurization in the desulfurization unit 300.

[0035] The embodiments disclosed herein are illustrative in all aspects and are not restrictive. The scope of the present invention is indicated by the claims, and all modifications within the meaning and scope equivalent to the claims are included.

Claims

1. A power storage device, characterized in that: have: a plurality of power storage units; a housing that accommodates the plurality of power storage units; and A desulfurization unit is disposed in the shell. The housing includes a top wall disposed above the plurality of power storage units. The top wall has a discharge portion for discharging gas in the housing to the outside of the housing. The desulfurization unit has: desulfurization agent; and A communication path is provided to accommodate the desulfurizing agent and to communicate the inside of the shell with the discharge part. The communication path has: a discharge-side up-down path extending downward from the discharge portion; a supporting path extending horizontally from a lower end portion of the discharge-side up-and-down path and supporting the desulfurizing agent; and A suction side up-down path extends upward from an end of the support path and opens in the housing.

2. The power storage device according to claim 1, characterized in that The discharge portion is constituted by a pressure regulating valve that regulates the pressure in the housing.

3. The power storage device according to claim 2, characterized in that The desulfurization unit also has: a discharge side retaining plate connected to the upper end of the discharge side up-and-down path; A suction side holding plate connected to the upper end of the suction side up-down path; a discharge side filter held by the discharge side holding plate; and a suction side filter held by the suction side holding plate, The discharge-side holding plate holds the discharge-side filter so that the discharge-side filter is disposed between the pressure regulating valve and the discharge-side up-and-down path.

4. The power storage device according to any one of claims 1 to 3, characterized in that: The support path has: a first path extending from a lower end portion of the discharge-side up-and-down path in a first direction orthogonal to the up-and-down direction; a second path extending from a lower end portion of the suction-side up-and-down path in the first direction; and a third path connecting the first path and the second path, The third path has a shape extending along a second direction orthogonal to both the up-down direction and the first direction.

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