Abstract: An abnormality detection device includes: a voltage value acquisition unit configured to acquire a voltage value of each battery cells, a state value measurement unit configured to measure a state value inside a battery pack, which is different from a temperature of each battery cell, and an abnormality determination unit configured to determine an abnormality of the battery pack. The abnormality determination unit includes: a voltage value comparison unit configured to compare the voltage value with a predetermined voltage threshold value, and a state value comparison unit configured to compare at least one of the state value and a degree of change in the state value per unit time with a predetermined state threshold value. The abnormality determination unit is configured to determine an abnormality of the battery pack based on both a voltage value comparison result and a state value comparison result.

Abstract: A controller makes it possible to more securely execute, when a thermal runaway occurs in a battery pack, communications for a fail-safe action with an external device. A controller is configured to execute, when a thermal runaway occurs in a battery pack, communications for a fail-safe action with an external device. A first battery module is arranged on a side farther than the controller in a first direction. A second battery module is arranged on a side farther than the controller in a second direction that is a direction opposite to the first direction. A first wire extends from the controller in the first direction and passes immediately above the first battery module. A second wire extends from the controller in the second direction and passes immediately above the second battery module, and has a function identical to a function of the first wire in the communications.

Abstract: A battery pack includes a first battery case accommodating a plurality of cells, and a second battery case laminated above the first battery case and accommodating a plurality of cells. The first battery case has a first through-hole on an upper surface. The second battery case has a second through-hole on a bottom surface which communicates with the first through-hole. The battery pack includes a communication port composed of the first through-hole and the second through-hole, a gas discharge valve which is provided only in either the first battery case or the second battery case and opens when internal pressure of the battery pack is higher than a predetermined value, and a temperature sensor provided on a gas flow path connected to the gas discharge valve.

Abstract: A battery module includes: a cell laminated body; a first and a second end plates which are provided at both end portions of the cell laminated body; and a sensor device which is mounted on a mounting surface and detects the voltage of each cell in the cell laminated body. The sensor device includes: a sensor device body; and a sensor fixing portion which is fixed to the first end plate by a fastening member. In the perpendicular direction, an end surface of the fastening member is located to be lower than or equal to an end surface of the sensor device body, the mounting surface of the cell laminated body is located to be lower than a bottom surface of the sensor fixing portion, and an end surface of the first end plate is located to be lower than the mounting surface of the cell laminated body.

Abstract: An abnormality detection device includes: a voltage value acquisition unit configured to acquire a voltage value of each battery cells, a state value measurement unit configured to measure a state value inside a battery pack, which is different from a temperature of each battery cell, and an abnormality determination unit configured to determine an abnormality of the battery pack. The abnormality determination unit includes: a voltage value comparison unit configured to compare the voltage value with a predetermined voltage threshold value, and a state value comparison unit configured to compare at least one of the state value and a degree of change in the state value per unit time with a predetermined state threshold value. The abnormality determination unit is configured to determine an abnormality of the battery pack based on both a voltage value comparison result and a state value comparison result.

Abstract: A battery pack includes a first battery case accommodating a plurality of cells, and a second battery case laminated above the first battery case and accommodating a plurality of cells. The first battery case has a first through-hole on an upper surface. The second battery case has a second through-hole on a bottom surface which communicates with the first through-hole. The battery pack includes a communication port composed of the first through-hole and the second through-hole, a gas discharge valve which is provided only in either the first battery case or the second battery case and opens when internal pressure of the battery pack is higher than a predetermined value, and a temperature sensor provided on a gas flow path connected to the gas discharge valve.

Abstract: A battery module includes: a cell-stacked body constituted by stacking a plurality of cells; a plurality of bus bars, each of which connects terminals of adjacent cells; and a sensor device configured to detect a voltage of each cell. The sensor device is disposed above the plurality of bus bars disposed on an upper surface of the cell-stacked body as viewed from a width direction perpendicular to a stacking direction and an up-down direction, and includes a connector having a connection portion in the width direction. Each of the bus bars has a bent portion protruding upward between the cells to be connected. The connector is disposed between the bent portions of adjacent bus bars in the stacking direction, and a lower surface of the connector is provided at a position lower than an upper portion of the bent portion in the up-down direction.

Abstract: A battery module includes: a cell-stacked body constituted by stacking a plurality of cells; and a sensor device configured to detect a voltage of each cell. The sensor device is disposed on an upper portion of the cell-stacked body. The sensor device is provided with a sensor bulging portion which bulges downward, and the upper portion of the cell-stacked body is provided with a low-height portion accommodating the sensor bulging portion.

Abstract: A battery module includes: a cell laminated body; a first and a second end plates which are provided at both end portions of the cell laminated body; and a sensor device which is mounted on a mounting surface and detects the voltage of each cell in the cell laminated body. The sensor device includes: a sensor device body; and a sensor fixing portion which is fixed to the first end plate by a fastening member. In the perpendicular direction, an end surface of the fastening member is located to be lower than or equal to an end surface of the sensor device body, the mounting surface of the cell laminated body is located to be lower than a bottom surface of the sensor fixing portion, and an end surface of the first end plate is located to be lower than the mounting surface of the cell laminated body.

Abstract: A battery module includes: a cell-stacked body constituted by stacking a plurality of cells; and a sensor device configured to detect a voltage of each cell. The sensor device is disposed on an upper portion of the cell-stacked body. The sensor device is provided with a sensor bulging portion which bulges downward, and the upper portion of the cell-stacked body is provided with a low-height portion accommodating the sensor bulging portion.

Abstract: A battery module includes: a cell-stacked body constituted by stacking a plurality of cells; and a sensor device configured to detect a voltage of each cell. The sensor device is disposed on an upper surface of the cell-stacked body. An insulation plate is provided between adjacent cells, and the sensor device is vertically fixed to at least two insulation plates spaced in a stacking direction.

Abstract: A battery module includes: a cell-stacked body constituted by stacking a plurality of cells; a plurality of bus bars, each of which connects terminals of adjacent cells; and a sensor device configured to detect a voltage of each cell. The sensor device is disposed above the plurality of bus bars disposed on an upper surface of the cell-stacked body as viewed from a width direction perpendicular to a stacking direction and an up-down direction, and includes a connector having a connection portion in the width direction. Each of the bus bars has a bent portion protruding upward between the cells to be connected. The connector is disposed between the bent portions of adjacent bus bars in the stacking direction, and a lower surface of the connector is provided at a position lower than an upper portion of the bent portion in the up-down direction.

Abstract: An electric storage device includes an electric storage module, a bracket, an electric junction box, and a wire harness. The electric storage module includes electric storage components. The electric storage module includes an end surface and peripheral surfaces perpendicular to the end surface. The bracket is mounted to the electric storage module and includes a first surface opposed to the end surface of the electric storage module and a second surface opposite from the first surface. The electric junction box is mounted to the bracket to be opposed to the second surface of the bracket with a gap between the electric junction box and the second surface of the bracket. The wire harness is connected to the electric storage module and disposed in a section of the gap in which the end surface of the electric storage module is opposed to the electric junction box.

Abstract: An electric storage device includes an electric storage module, a bracket, an electric junction box, and a wire harness. The electric storage module includes electric storage components. The electric storage module includes an end surface and peripheral surfaces perpendicular to the end surface. The bracket is mounted to the electric storage module and includes a first surface opposed to the end surface of the electric storage module and a second surface opposite from the first surface. The electric junction box is mounted to the bracket to be opposed to the second surface of the bracket with a gap between the electric junction box and the second surface of the bracket. The wire harness is connected to the electric storage module and disposed in a section of the gap in which the end surface of the electric storage module is opposed to the electric junction box.