Battery pack and vehicle

Patent metadata

Field	Value
Publication number	US-2025023131-A1
Application number	US-202418443745-A
Country	US
Kind code	A1
Filing date	Feb 16, 2024
Priority date	Jul 12, 2023
Publication date	Jan 16, 2025
Grant date	—

Abstract

The unit cell is composed of a sulfide-based all-solid-state battery. The battery pack includes a battery module in which a plurality of unit cells is stacked between a pair of end plates. The battery module is housed in a battery case. A duct is attached to the opening formed in the ceiling surface of the upper case. A desulfurization agent is disposed inside the duct, and is configured as a desulfurization unit. A hydrogen sulfide sensor is disposed inside the duct. By detecting the hydrogen sulfide by the hydrogen sulfide sensor, it is possible to sense that the adsorption amount of the hydrogen sulfide of the desulfurization agent is saturated or that there is a possibility of saturation.

First claim

What is claimed is:

1 . A battery pack comprising:
a battery, made up of a sulfide-based all-solid-state battery housed in a battery case; a communication passage communicating between an inside and an outside of the battery case; a desulfurization agent for adsorbing hydrogen sulfide, provided in the communication passage; and a hydrogen sulfide sensor for detecting hydrogen sulfide, provided in the communication passage.

2 . The battery pack according to claim 1 , wherein the hydrogen sulfide sensor is provided on the outside side of the desulfurization agent in the communication passage.

3 . The battery pack according to claim 1 , wherein:
the communication passage includes a narrow passage portion of which a channel cross-sectional area is smaller than that of other portions; and the hydrogen sulfide sensor is provided in the narrow passage portion.

4 . The battery pack according to claim 1 , wherein:
the communication passage includes
a first desulfurization unit including the desulfurization agent,
a second desulfurization unit including the desulfurization agent, and
a connecting pipe connecting the first desulfurization unit and the second desulfurization unit; and
the first desulfurization unit is disposed on the outside side of the second desulfurization unit.

5 . A vehicle comprising:
the battery pack according to claim 1 ; and a control device, wherein the control device is configured to perform notification when a detection value of the hydrogen sulfide sensor satisfies a predetermined condition.

Assignees

• Toyota Motor Co Ltd

Inventors

• Ukita Keisuke
• Kuruma Yusuke
• Migita Tsubasa
• Morikawa Kei
• Oguma Yasumasa

Classifications

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M10/52 Primary

  Removing gases inside the secondary cell, e.g. by absorption (vent plugs or other mechanical arrangements for facilitating escape of gases H01M50/30) · CPC title

• H01M10/48 Primary

  Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) · CPC title

• H01M10/488

  Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density · CPC title

• H01M10/482

  for several batteries or cells simultaneously or sequentially · CPC title