Abstract: A three-terminal capacitor includes a main body having a cylindrical or substantially cylindrical shape extending in a first direction and including first and second inner electrodes alternately laminated together with dielectric layers interposed therebetween, a pair of first outer electrodes on two end surfaces of the main body in the first direction and electrically connected to the first inner electrodes, and a second outer electrode electrically connected to the second inner electrodes. The main body includes a projecting portion projecting in a direction perpendicular or substantially perpendicular to the first direction at a position between the pair of first outer electrodes. The second outer electrode is provided on one surface of the projecting portion viewable when viewed in the first direction.

Abstract: A charging control device including: a first and second electrode supply path; a voltage measurement circuit configured to measure a voltage between the first and second electrode side supply paths; a first and second electrode side relays on the first and second electrode side supply paths which are located closer to the battery than the voltage measurement circuit; a series circuit of a resistor and a resistance regulation relay, the series circuit being connected in parallel to the voltage measurement circuit; and a controller configured to control opening and closing the first electrode side relay, the second electrode side relay and the resistance regulation relay, wherein the controller is configured to control the resistance regulation relay to be closed when performing welding determination of the first electrode side relay and/or the second electrode side relay.

Abstract: A ground fault detection device includes: a detection capacitor; a switch group for switching between a first charging path connecting the battery and the detection capacitor, a second charging path connecting the battery, a negative side insulation resistance and the detection capacitor, a third charging path connecting the battery, a positive side insulation resistance and the detection capacitor, and a measurement path for measuring a charging voltage of the detection capacitor; and a controller configured to calculate the insulation resistance based on a charging voltage measured value of the detection capacitor which exists after charging each of the charging paths, wherein after measurement of the charging voltage of the second charging path, the controller is configured to cause the switch group to switch to the third charging path before switching to the first charging path.

Abstract: An earth fault detection apparatus includes a switch group configured to switch between a first measurement path including a battery and a capacitor, and a second and third measurement paths including the battery, a positive/negative-side insulation resistance, and the capacitor; a reference resistance and a test switch; and a control unit calculating a first reference value based on each charging voltage in a case where the test switch is opened and the capacitor is charged, and calculating the insulation resistance with reference to a conversion map created to correspond to an electrostatic capacitance between a power supply line and ground, wherein the control unit calculates a second reference value based on each charging voltage in a case where the test switch is closed and the capacitor is charged for a shorter time, and estimates the electrostatic capacitance with reference to a predetermined test conversion map.

Abstract: A ground fault detection device includes: a detection capacitor; a switch group for switching between a first charging path connecting the battery and the detection capacitor, a second charging path connecting the battery, a negative side insulation resistance and the detection capacitor, a third charging path connecting the battery, a positive side insulation resistance and the detection capacitor, and a measurement path for measuring a charging voltage of the detection capacitor; and a controller configured to calculate the insulation resistance based on a charging voltage measured value of the detection capacitor which exists after charging each of the charging paths, wherein after measurement of the charging voltage of the second charging path, the controller is configured to cause the switch group to switch to the third charging path before switching to the first charging path.

Abstract: An earth fault detection apparatus includes a switch group configured to switch between a first measurement path including a battery and a capacitor, and a second and third measurement paths including the battery, a positive/negative-side insulation resistance, and the capacitor; a reference resistance and a test switch; and a control unit calculating a first reference value based on each charging voltage in a case where the test switch is opened and the capacitor is charged, and calculating the insulation resistance with reference to a conversion map created to correspond to an electrostatic capacitance between a power supply line and ground, wherein the control unit calculates a second reference value based on each charging voltage in a case where the test switch is closed and the capacitor is charged for a shorter time, and estimates the electrostatic capacitance with reference to a predetermined test conversion map.

Abstract: A pair of end plates is a pair of members provided at both ends of a battery cell assembly in an array direction to clamp the battery cell assembly from both sides in the array direction. The pair of end plates has a plate upper surface and a recess. The plate upper surface is positioned on the same side as that of an electrode mounting surface. The recess is recessed from the plate upper surface and accommodates at least part of a coupling connector. With this configuration, a battery module and a battery monitoring unit mounting structure can prevent the battery module from increasing in size.

Abstract: A charging control device including: a first and second electrode supply path; a voltage measurement circuit configured to measure a voltage between the first and second electrode side supply paths; a first and second electrode side relays on the first and second electrode side supply paths which are located closer to the battery than the voltage measurement circuit; a series circuit of a resistor and a resistance regulation relay, the series circuit being connected in parallel to the voltage measurement circuit; and a controller configured to control opening and closing the first electrode side relay, the second electrode side relay and the resistance regulation relay, wherein the controller is configured to control the resistance regulation relay to be closed when performing welding determination of the first electrode side relay and/or the second electrode side relay.

Abstract: A voltage measurement device includes a voltage measurement circuit part, a voltage generation circuit part, and a control unit. In a voltage measurement mode, a measurement result of the input voltage is detected as an output voltage value based on the output signal of the voltage measurement circuit part. In a self-diagnosis mode, it is determined whether the measured output voltage value when the lower limit voltage is applied by the voltage generation circuit part is within a specific lower limit range (first determination). Further, a specific intermediate range is set based on the output voltage value and a specific upper limit range, and it is determined whether the output voltage value when the intermediate voltage is applied by the voltage generation circuit part is within the specific intermediate range (second determination). Self-diagnosis of the voltage measurement circuit part is performed based on the first and second determinations.

Abstract: A battery monitoring device includes a monitoring control unit configured to monitor a battery state of each battery cell of a battery module formed by arranging the plurality of battery cells and control each of the battery cells on the basis of a monitoring result. The monitoring control unit has a heat radiation source that radiates heat as an electric current flows, and the heat radiation source is arranged in a position where air discharged from a gap between the neighboring battery cells collides with the heat radiation source. For example, the heat radiation source is arranged to face an outlet port from which the air of the gap between the neighboring battery cells is discharged.

Abstract: A battery module includes a cell module including a plurality of battery cells, a smoke exhaust duct protruding from an electrode arrangement surface of the cell module and extending along an alignment direction of the plurality of battery cells, and a circuit board arranged so as to cover the smoke exhaust duct and the electrode arrangement surface. The circuit board is arranged in an inclined state to be non-parallel to the electrode arrangement surface.

Abstract: A fixation structure includes an electrical wire, a board, and a stapler. The electrical wire includes a core wire and a cover member. The electrical wire includes a core-wire covered part covered by the cover member, and a core-wire exposed part exposed from the core-wire covered part. The board includes a junction part electrically connected with the core-wire exposed part. The stapler includes a contact part and a fixation part. The contact part has a plate shape, and is positioned at a boundary between the core-wire exposed part and the core-wire covered part while contacting the core-wire exposed part and the core-wire covered part from a side opposite to the board when the core-wire exposed part is connected with the junction part. A pair of the fixation parts are provided on both sides of the contact part and fix the contact part and the board.

Abstract: a reference voltage generating circuit that includes a bandgap reference voltage generating circuit main body (10) configured to generate a substantially constant reference voltage at room temperature, a high temperature correction circuit (30) configured to increase a reference voltage generated by the reference voltage generating circuit main body at a high temperature by supplying a high temperature correction current that increases as the temperature increases to the resistor, a low temperature correction circuit (40) configured to increase a reference voltage generated by the reference voltage generating circuit main body at a low temperature by supplying a low temperature correction current that increases as the temperature decreases to the resistor, and a bias circuit (20) configured to generate a bias voltage according to the temperature, so as to control the high temperature correction current and the low temperature correction current at the same time.

Abstract: A pair of end plates is a pair of members provided at both ends of a battery cell assembly in an array direction to clamp the battery cell assembly from both sides in the array direction. The pair of end plates has a plate upper surface and a recess. The plate upper surface is positioned on the same side as that of an electrode mounting surface. The recess is recessed from the plate upper surface and accommodates at least part of a coupling connector. With this configuration, a battery module and a battery monitoring unit mounting structure can prevent the battery module from increasing in size.

Abstract: A voltage measurement device includes a voltage measurement circuit part, a voltage generation circuit part, and a control unit. In a voltage measurement mode, a measurement result of the input voltage is detected as an output voltage value based on the output signal of the voltage measurement circuit part. In a self-diagnosis mode, it is determined whether the measured output voltage value when the lower limit voltage is applied by the voltage generation circuit part is within a specific lower limit range (first determination). Further, a specific intermediate range is set based on the output voltage value and a specific upper limit range, and it is determined whether the output voltage value when the intermediate voltage is applied by the voltage generation circuit part is within the specific intermediate range (second determination). Self-diagnosis of the voltage measurement circuit part is performed based on the first and second determinations.

Abstract: A fixation structure includes an electrical wire, a board, and a stapler. The electrical wire includes a core wire and a cover member. The electrical wire includes a core-wire covered part covered by the cover member, and a core-wire exposed part exposed from the core-wire covered part. The board includes a junction part electrically connected with the core-wire exposed part. The stapler includes a contact part and a fixation part. The contact part has a plate shape, and is positioned at a boundary between the core-wire exposed part and the core-wire covered part while contacting the core-wire exposed part and the core-wire covered part from a side opposite to the board when the core-wire exposed part is connected with the junction part. A pair of the fixation parts are provided on both sides of the contact part and fix the contact part and the board.

Abstract: a reference voltage generating circuit that includes a bandgap reference voltage generating circuit main body (10) configured to generate a substantially constant reference voltage at room temperature, a high temperature correction circuit (30) configured to increase a reference voltage generated by the reference voltage generating circuit main body at a high temperature by supplying a high temperature correction current that increases as the temperature increases to the resistor, a low temperature correction circuit (40) configured to increase a reference voltage generated by the reference voltage generating circuit main body at a low temperature by supplying a low temperature correction current that increases as the temperature decreases to the resistor, and a bias circuit (20) configured to generate a bias voltage according to the temperature, so as to control the high temperature correction current and the low temperature correction current at the same time.

Abstract: A battery monitoring device includes a battery information input terminal, a battery state monitoring unit, an output terminal, a circuit board, and a housing member. The battery information input terminal is electrically connected to a battery state detecting member. The battery state monitoring unit receives a battery state detection signal via the battery information input terminal. The output terminal outputs monitoring information on the battery state corresponding to the battery state detection signal to an external arithmetic processor. The circuit board is provided with the battery information input terminal, the battery state monitoring unit, and the output terminal. The housing member is integrally formed with the battery information input terminal, the battery state monitoring unit, the output terminal, and the circuit board so as to accommodate at least the whole battery state monitoring unit and the whole circuit board and expose terminal connecting portions to the outside.

Abstract: A battery monitoring device includes a monitoring control unit configured to monitor a battery state of each battery cell of a battery module formed by arranging the plurality of battery cells and control each of the battery cells on the basis of a monitoring result. The monitoring control unit has a heat radiation source that radiates heat as an electric current flows, and the heat radiation source is arranged in a position where air discharged from a gap between the neighboring battery cells collides with the heat radiation source. For example, the heat radiation source is arranged to face an outlet port from which the air of the gap between the neighboring battery cells is discharged.

Abstract: According to one embodiment, a semiconductor light receiving element includes at least a first periodic structure, a semiconductor multilayered film, and a light confinement layer. The first periodic structure is provided in a light incident portion, and splits and converts, into non-perpendicular light in two or more directions, light incident from a direction perpendicular to the light incident portion. The semiconductor multilayered film includes a light absorption layer and is provided on the first periodic structure in contact with the first periodic structure. The light confinement layer is provided on the semiconductor multilayered film. A refractive index of the light confinement layer is lower than a refractive index of the semiconductor multilayered film.