Abstract: A battery device includes battery module, each including an assembled battery and a battery monitoring circuit. The assembled battery comprises battery cells. The battery monitoring circuit measures voltages of the battery cells, current and temperature levels of the assembled battery. A control circuit is connected to the battery monitoring circuits through a communication line and supplies power to the battery monitoring circuits. The control circuit communicates with the battery monitoring circuits through the communication line. Each battery monitoring circuit is configured to monitor signals transmitted on the communication line for a predetermined time period after its startup, and then to select a communication ID to one that does not conflict with any other ID used to communicate through the communication line during the predetermined time period. The selected ID is then transmitted on the communication line.

Abstract: An electric leakage detection method includes: measuring a set of a first voltage and total voltage times to be recorded in a memory by the control apparatus in a state that one of first and second switches is closed and another of the first and second switches is opened; measuring, by the voltage detector, at least one second voltage corresponds to the total voltage whose difference from any one of the total voltages recorded in the memory is equal to or less than a voltage threshold value; computing a total insulation resistance between the storage battery group and the ground by using the total voltage, the first voltage, and the second voltage; and determining presence of electric leakage when a value of the total insulation resistance is equal to or less than an electric leakage threshold value.

Abstract: A battery device includes battery module, each including an assembled battery and a battery monitoring circuit. The assembled battery comprises battery cells. The battery monitoring circuit measures voltages of the battery cells, current and temperature levels of the assembled battery. A control circuit is connected to the battery monitoring circuits through a communication line and supplies power to the battery monitoring circuits. The control circuit communicates with the battery monitoring circuits through the communication line. Each battery monitoring circuit is configured to monitor signals transmitted on the communication line for a predetermined time period after its startup, and then to select a communication ID to one that does not conflict with any other ID used to communicate through the communication line during the predetermined time period. The selected ID is then transmitted on the communication line.

Abstract: According to one embodiment, a dynamo-electric machine includes a rotor, a stator, a frame, a shaft sealing device, and a gas purity maintainer. The gas purity maintainer includes an expansion tank, a first mist collecting section, a valve unit, a drain pot, and an instrument panel. The first mist collecting section is provided in the middle of a scavenging pipe extending from the expansion tank to discharge a coolant gas from the expansion tank. A downstream in the first mist collecting section is higher than an upstream.

Abstract: According to one embodiment, a power supply apparatus includes a battery assembly, a fuse element, a switch unit, and a control unit. The fuse element is connected between the battery assembly and a load unit driven by being supplied with power from the battery assembly. The switch unit is connected in parallel to the load unit. The control unit causes, when an over voltage of at least one of the battery assembly and the load unit is detected, the switch unit to be in an ON state, provides an over current to flow from the battery assembly to the fuse element, and fusing the fuse element.

Abstract: A car power source apparatus is provided to include a driving battery 11 outputting an output voltage for driving a car, a monitoring and control circuit 21 monitoring and controlling the driving battery 11 and connected to an auxiliary battery 3 via power supply lines 2, and a battery case 1 housing the driving battery 11 and the monitoring and control circuit 21 and connected to a car chassis ground 5 via a ground line 4. Further, the power source apparatus is provided with a connection detection circuit 40. This connection detection circuit 40 determines the condition of the connection of the battery case 1 and an auxiliary battery 3 power supply line 2 via the ground line 4 and the car chassis ground 5 to determine the condition of the ground line 4 connection.

Abstract: A power source apparatus of a car is provided with contactors (2) connected to an output-side of a battery (1); a pre-charge circuit (3) made up of a series connected pre-charge resistor (6) and a pre-charge relay (7), which is connected with a contactor (2) to supply auxiliary charge to a capacitor (21) connected to a car-side of the battery (1); and a control circuit (4) to control the contactors (2) and the pre-charge relay (7). The pre-charge resistor (6) is connected in parallel with a contactor (2), and the pre-charge relay (7) is connected in series with that contactor (2). The control circuit (4) switches the pre-charge relay (7) ON to pre-charge the car-side capacitor (21), and then switches the contactor (2) ON to connect the battery (1) to the car-side.

Abstract: The car power source apparatus is provided with a driving battery 1 that supplies power to the car's electric motor, a voltage detection circuit 3 that measures the voltage of batteries 2 in the driving battery 1, a plurality of voltage detection lines 8 connected in parallel between the input-side of the voltage detection circuit 3 and driving battery 1 voltage detection nodes 9, and a decision circuit 6 that determines if a voltage detection line 8 is open circuited from the voltage measured by the voltage detection circuit 3. Each voltage detection line 8 has a voltage drop resistor 10 connected in series. The voltage detection circuit 3 is provided with input resistors 13 on its input-side. The car power source apparatus makes computations on the voltage measured by the voltage detection circuit 3, which is from the voltage divider formed by the input resistor 13 and voltage drop resistors 10, to detect voltage detection line 8 open circuit.

Abstract: The battery system has a battery 1 having a plurality of series-connected battery cells 2, a voltage detection circuit 3 that detects each battery cell voltage, discharge circuits 4 to discharge each battery cell, and a decision circuit 5 that judges the condition of the connection between a battery cell 2 and the voltage detection circuit 3 from the detected battery cell voltage measured by the voltage detection circuit. The voltage detection circuit 3 measures discharge voltage of a battery cell 2 with the discharge circuit 4 in the discharging state, and measures non-discharge voltage with the battery cell 2 in a non-discharging state. The decision circuit 5 compares the difference between the detected battery cell non-discharge voltage and discharge voltage with the normal voltage, or compares battery cell discharge voltage with the normal voltage to judge abnormal connection between the battery cell and the voltage detection circuit.

Abstract: The car power source apparatus is provided with a driving battery 11 that drives the car, a monitoring and control circuit 21 that monitors and controls the driving battery 11 and is connected to the auxiliary battery 3 via power supply lines 2, and a battery case 1 that houses the driving battery 11 and the monitoring and control circuit 21 and is connected to the car chassis ground 5 via a ground line 4. Further, the power source apparatus is provided with a connection detection circuit 40. This connection detection circuit 40 determines the condition of the connection of the battery case 1 and an auxiliary battery 3 power supply line 2 via the ground line 4 and the car chassis ground 5 to determine the condition of the ground line 4 connection.

Abstract: The car power source apparatus is provided with contactors 2 connected to the output-side of the battery 1; a pre-charge circuit 3 made up of a series connected pre-charge resistor 6 and a pre-charge relay 7, which is connected with a contactor 2 to supply auxiliary charge to a capacitor 21 connected to the car-side of the battery 1; and a control circuit 4 to control the contactors 2 and pre-charge relay 7.The pre-charge resistor 6 is connected in parallel with a contactor 2, and the pre-charge relay 7 is connected in series with that contactor 2. The control circuit 4 switches the pre-charge relay 7 ON to pre-charge the car-side capacitor 21, and then switches the contactor 2 ON to connect the battery 1 to the car-side.

Abstract: The car power source apparatus is provided with a driving battery 1 that supplies power to the car's electric motor, a voltage detection circuit 3 that measures the voltage of batteries 2 in the driving battery 1, a plurality of voltage detection lines 8 connected in parallel between the input-side of the voltage detection circuit 3 and driving battery 1 voltage detection nodes 9, and a decision circuit 6 that determines if a voltage detection line 8 is open circuited from the voltage measured by the voltage detection circuit 3. Each voltage detection line 8 has a voltage drop resistor 10 connected in series. The voltage detection circuit 3 is provided with input resistors 13 on its input-side. The car power source apparatus makes computations on the voltage measured by the voltage detection circuit 3, which is from the voltage divider formed by the input resistor 13 and voltage drop resistors 10, to detect voltage detection line 8 open circuit.