Abstract: An energy storage device includes a plurality of energy storage cells, a case, and a desulfurization unit. The case includes a top wall, and the top wall includes a discharge portion that discharges gas from inside the case to outside the case. The desulfurization unit includes a desulfurization agent and a communication path that contains the desulfurization agent and that allows the inside of the case to communicate with the discharge portion. The communication path includes a discharge-side vertical path extending downward from the discharge portion, a support path extending horizontally from a lower end of the discharge-side vertical path and supporting the desulfurization agent, and a suction-side vertical path extending upward from an end of the support path and opening into the case.

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.

Abstract: In a laminated all-solid-state battery, a negative electrode terminal and a positive electrode terminal around which a resin sheet is wound are sandwiched between exterior members (laminate films), and the exterior members are joined by heat welding. The laminated all-solid-state battery is in contact with the heat exchanger via a heat conductive sheet. When the terminal temperature detected by the temperature sensor provided at the negative electrode terminal and the positive electrode terminal is equal to or higher than a predetermined value, the flow rate control valve is fully closed and the flow rate control valve is fully opened. The cooling amount of the joint portion in which the negative electrode terminal and the positive electrode terminal extend increases, the temperature of the joint portion decreases, the deformation of the resin sheet is suppressed, and the unsealing of the seal is suppressed.

Abstract: A battery system includes a battery and an ECU. The ECU executes polarization cancellation control for canceling polarization of the battery and calculation processing for calculating SOC of the battery after the polarization cancellation control. When the polarization cancellation control is executed after the battery is discharged, the polarization cancellation control is charging control for charging the battery. When the polarization cancellation control is executed after the battery is charged, the polarization cancellation control is discharging control for discharging the battery.

Abstract: A battery system includes a battery unit, a heater unit, and a sensor unit. The battery unit is accommodated in a battery case and includes sulfide-based all-solid-state batteries. The heater unit is configured to heat the battery unit. The sensor unit is configured to measure a hydrogen sulfide gas concentration inside the battery case. The heater unit is started to be driven when a measured value of the sensor unit becomes greater than the first threshold value. After starting the driving of the heater unit, when the measured value becomes greater than the second threshold value that is higher than the first threshold value, a responsive control is executed to deal with generation of the hydrogen sulfide gas from the sulfide-based all-solid-state batteries.

Abstract: When an ECU determines that a gas concentration within a battery pack is increasing, the ECU performs processing including: obtaining positional information; obtaining an amount of insolation; and performing gas exhaust processing when the ECU determines that a vehicle is traveling, determines that the position of the vehicle is a position where there is no cover above the vehicle, and determines that the position of the vehicle is a position where exhaust has no influence.

Abstract: A power storage device is a power storage device including: a battery cell having a sulfide solid electrolyte; a case that accommodates the battery cell; and at least one gas collection unit that is disposed in the case and that detects hydrogen sulfide, wherein a protruding portion is formed in a bottom surface of an inner surface of the case, and the gas collection unit is disposed in the protruding portion.

Abstract: A battery system that avoids an over discharge with a simple sensor element is provided. The battery system comprises: a battery pack including a plurality of battery cells connected in series, a monitoring unit that monitors a condition of the battery pack, and a control unit that controls a discharge of the battery pack. The control unit calculates capacity condition A of the battery pack at a first discharge cutoff voltage based on the total voltage and the total current, estimates capacity condition B of the battery pack at the first discharge cutoff voltage based on the total current and the temperature, determines an occurrence of an over discharge based on the capacity condition A and the capacity condition B, changes the first discharge cutoff voltage to a second discharge cutoff voltage that is higher than the first discharge cutoff voltage, when the occurrence of the over discharge is determined.

Abstract: The ECU performs a step of determining whether charging/discharging control is being executed, a step of acquiring the temperature of the terminal portion when it is determined that charging/discharging control is being executed, and a step of determining the charging power limit value, a step of setting a discharge power limit value, and a step of performing charge/discharge control using the set charge power limit value and the set discharge power limit value.

Abstract: A battery system includes at least one pack in which an all-solid-state battery cell is sealed, and a sensing unit configured to sense deformation of the at least one pack due to change in internal pressure of the at least one pack.

Abstract: The all-solid-state battery pack includes an all-solid-state battery containing a sulfide solid electrolyte, a battery case housing the all-solid-state battery, and a desulfurization unit disposed at a communication port or inside the battery case. The desulfurization unit includes a unit case and a desulfurization agent enclosed in the unit case. The desulfurization agent contains an alumina-based desulfurization agent. The desulfurization unit includes a carbon material enclosed in the unit case.

Abstract: A vehicle on which an all-solid-state battery is mounted includes the all-solid-state battery, and a case that accommodates the all-solid-state battery. The vehicle is configured such that, when gas is generated in the case, a blocking process is executed to separate a vehicle cabin from outside air.

Abstract: A battery system includes: a battery case; a battery housed in the battery case, the battery being composed of a sulfide-based all-solid-state battery; a first detection unit located on a bottom surface of the battery case inside the battery case and configured to detect hydrogen sulfide; a second detection unit located vertically above the bottom surface inside the battery case and configured to detect hydrogen sulfide; and a control device. The control device includes an abnormality processing unit configured to perform an abnormality process based on detection results from the first detection unit and the second detection unit. The abnormality processing unit is configured to perform a first abnormality process when hydrogen sulfide is detected only by the first detection unit, and to perform a second abnormality process when hydrogen sulfide is detected by the second detection unit.

Abstract: A battery system includes a unit cell including a sulfide-based all-solid-state battery, a battery module in which a plurality of the unit cells is stacked between a pair of restraining members, an intermediate plate disposed between the stacked unit cells, a detection unit configured to detect a load applied to the intermediate plate, and an estimation unit configured to estimate generation of hydrogen sulfide in the unit cell, based on a change in load applied to the intermediate plate.

Abstract: A battery system that avoids an over discharge with a simple sensor element is provided. The battery system comprises: a battery pack including a plurality of battery cells connected in series, a monitoring unit that monitors a condition of the battery pack, and a control unit that controls a discharge of the battery pack. The control unit calculates capacity condition A of the battery pack at a first discharge cutoff voltage based on the total voltage and the total current, estimates capacity condition B of the battery pack at the first discharge cutoff voltage based on the total current and the temperature, determines an occurrence of an over discharge based on the capacity condition A and the capacity condition B, changes the first discharge cutoff voltage to a second discharge cutoff voltage that is higher than the first discharge cutoff voltage, when the occurrence of the over discharge is determined.

Abstract: A battery system avoids an over discharge with a simple sensor element is provided. The battery system comprises: a battery pack including a plurality of battery cells connected in series, a monitoring unit that monitors a condition of the battery pack, and a control unit that controls a discharge of the battery pack. The control unit calculates capacity condition A of the battery pack at a first discharge cutoff voltage based on the total voltage and the total current, estimates capacity condition B of the battery pack at the first discharge cutoff voltage based on the total current and the temperature, determines an occurrence of an over discharge based on the capacity condition A and the capacity condition B, changes the first discharge cutoff voltage to a second discharge cutoff voltage that is higher than the first discharge cutoff voltage, when the occurrence of the over discharge is determined.

Abstract: The battery of the present disclosure comprises a plurality of electrode bodies, wherein one of the electrode bodies and another of the electrode bodies are connected via a conductive material, each of the electrode bodies includes a metal current collector, an active material layer, and an electrolyte layer, the metal current collector has a connection surface which contacts the conductive material and a laminate surface which contacts the active material layer, and a ten-point average roughness of the laminate surface is less than a ten-point average roughness of the connection surface. According to the battery of the present disclosure, both adhesion between the metal current collector and the active material layer in the electrode body and connectivity between the electrode bodies via the conductive material can be achieved.

Abstract: The battery of the present disclosure comprises a plurality of electrode bodies, wherein one of the electrode bodies and another of the electrode bodies are connected via a conductive material, each of the electrode bodies includes a metal current collector, an active material layer, and an electrolyte layer, the metal current collector has a connection surface which contacts the conductive material and a laminate surface which contacts the active material layer, and a ten-point average roughness of the laminate surface is less than a ten-point average roughness of the connection surface. According to the battery of the present disclosure, both adhesion between the metal current collector and the active material layer in the electrode body and connectivity between the electrode bodies via the conductive material can be achieved.

Abstract: A battery module disposed in a battery pack includes a plurality of flat plate batteries that are stacked; a connection member having a connection member main body that has a plate-shape and disposed in parallel with the flat plate batteries in a stacking direction of the flat plate batteries; and insulation members disposed on side surfaces of the connection member main body in the stacking direction of the flat plate batteries. The connection member has two terminals, a first terminal of the two terminals is connected to a terminal of the flat plate batteries, and a second terminal is connected to a terminal of an adjacent battery module.

Abstract: A module includes a first member that is a battery or a gas tank in which pressure fluctuation happens along one axis direction, a pair of second members, the second members being arranged on end portions of the first member in the one axis direction, respectively, and a binding member binding the first member and the second members while pressurizing them. The binding member is formed as fiber-reinforced plastic (FRP) containing fiber and resin is revolved. The FRP includes a base fiber layer with a fiber direction along a revolution direction, and a reinforcing fiber layer with a fiber direction different from that of the base fiber layer. The reinforcing fiber layer has a non-overlapping portion between both end portions in a revolved state. The non-overlapping portion is positioned in a region facing the first member.