Abstract: A battery monitoring apparatus is used in a battery assembly equipped with a plurality of batteries connected in series with each other. A plurality of measuring lines are mounted on a given layer of a multi-layer substrate and work to measure electrical potentials developed at terminals of the batteries, respectively. The measuring lines are classified into measuring line groups in order of electrical potential from lowest to highest. A plurality of solid patterns are arranged on one of layers of the multi-layer substrate other than the given layer and provided one for each of the measuring line groups. The solid patterns overlap the measuring line groups in planar view in a stacking direction of the multi-layer substrate. The solid patterns are arranged away from each other. The higher electrical potentials of the measuring line groups are, the higher electrical potentials of the corresponding solid patterns are.

Abstract: A connection part which connects a terminal part and a processing part include an equalization resistor that is inserted into each main line and a 0-? resistor that is a short circuit line for short circuiting a main line of a first terminal and a main line of a second terminal. In the terminal part, the second terminal s unused, and a battery cell adjacent to a high-potential side of a stack bar is connected between the first terminal and a third terminal.

Abstract: In an identifier assignment system for assigning identifiers to respective voltage monitors to be connected to respective battery units, each measuring unit measures elapsed time information indicative of an elapsed time that has elapsed since a predetermined point of time after an activation of the corresponding voltage monitor based on power supplied from the corresponding battery unit connected to the corresponding voltage monitor. Each measuring unit is also configured to wirelessly transmit the elapsed time information about the corresponding voltage monitor. A comparison unit performs a comparison task of comparing the elapsed times of the respective voltage monitors with each other. An assignment unit is configured to assign unique identifiers to the respective voltage monitors in accordance with a result of the comparison task.

Abstract: A monitoring apparatus includes: a monitoring portion that monitors a voltage of each of battery cells connected in series, each of the battery cells having an electrode terminal; and a wiring portion that connects the monitoring portion and the electrode terminal. The wiring portion includes a first flexible substrate and a second substrate that have flexibility and are integrally linked with each other. A linking part where the first flexible substrate and the second flexible substrate are linked is bent. The first flexible substrate is connected with the electrode terminal. The second flexible substrate is connected with the monitoring portion. One of the first flexible substrate and the second flexible substrate includes an arm. Another of the first flexible substrate and the second flexible substrate other than the one including the arm includes a slit. The arm is fixed to the slit, causing the linking part to be reinforced.

Abstract: A battery monitoring apparatus is used in a battery assembly equipped with a plurality of batteries connected in series with each other. A plurality of measuring lines are mounted on a given layer of a multi-layer substrate and work to measure electrical potentials developed at terminals of the batteries, respectively. The measuring lines are classified into measuring line groups in order of electrical potential from lowest to highest. A plurality of solid patterns are arranged on one of layers of the multi-layer substrate other than the given layer and provided one for each of the measuring line groups. The solid patterns overlap the measuring line groups in planar view in a stacking direction of the multi-layer substrate. The solid patterns are arranged away from each other. The higher electrical potentials of the measuring line groups are, the higher electrical potentials of the corresponding solid patterns are.

Abstract: A monitoring device includes a monitoring section and a wiring section for electrically connecting the monitoring section and a battery cell. A first and a second electrode terminal groups are reversely arranged. The wiring section includes a first wiring section for electrically connecting the first electrode terminal group and the monitoring section, and a second wiring section for electrically connecting the second electrode terminal group and the monitoring section. The first wiring section has a first substrate and a first wiring pattern, and the second wiring section has a second substrate and a second wiring pattern. The second substrate has a lateral connecting space where a first end side of the second wiring pattern is disposed and a longitudinal connecting space where a second end side of the second wiring pattern is disposed, and the second substrate is bent such that the spaces are opposed to each other.

Abstract: A voltage detection apparatus includes a supervisory unit that detects terminal voltage of battery cells that constitute a battery module, a high potential path, a low potential path, a differential amplifier that detects terminal voltage of the battery module. First and third switches are provided on the high potential path and second and fourth switches are provided on the low potential line. The voltage detection apparatus includes a bypass resistor that electrically connects the high potential path and the low potential path.

Abstract: In an identifier assignment system for assigning identifiers to respective voltage monitors to be connected to respective battery units, each measuring unit measures elapsed time information indicative of an elapsed time that has elapsed since a predetermined point of time after an activation of the corresponding voltage monitor based on power supplied from the corresponding battery unit connected to the corresponding voltage monitor. Each measuring unit is also configured to wirelessly transmit the elapsed time information about the corresponding voltage monitor. A comparison unit performs a comparison task of comparing the elapsed times of the respective voltage monitors with each other. An assignment unit is configured to assign unique identifiers to the respective voltage monitors in accordance with a result of the comparison task.

Abstract: A monitoring device includes a first monitoring section that monitors voltages of the plurality of battery cells connected in series and a first wiring section electrically connects the monitoring section and a plurality of battery cells. A first electrode terminal group and a second electrode terminal group in which a plurality of positive terminals and a plurality of negative terminals are aligned and alternate in a longitudinal direction are aligned in a horizontal direction by aligning the plurality of battery cells in the longitudinal direction. The first wiring section is provided with a front wiring section and a back wiring section having a both-end wiring pattern electrically connected to electrode terminals of two battery cells positioned at both ends of the plurality of battery cells aligned in the longitudinal direction and an even-number wiring pattern connected to electrode terminals of even-numbered battery cells in an aligning order.

Abstract: A voltage detection apparatus is provided which is suitable for an assembled battery including a series connection of battery cells.

Abstract: A connection part which connects a terminal part and a processing part include an equalization resistor that is inserted into each main line and a 0-? resistor that is a short circuit line for short circuiting a main line of a first terminal and a main line of a second terminal. In the terminal part, the second terminal s unused, and a battery cell adjacent to a high-potential side of a stack bar is connected between the first terminal and a third terminal.

Abstract: A monitoring apparatus includes: a monitoring portion that monitors a voltage of each of battery cells connected in series, each of the battery cells having an electrode terminal; and a wiring portion that connects the monitoring portion and the electrode terminal. The wiring portion includes a first flexible substrate and a second substrate that have flexibility and are integrally linked with each other. A linking part where the first flexible substrate and the second flexible substrate are linked is bent. The first flexible substrate is connected with the electrode terminal. The second flexible substrate is connected with the monitoring portion. One of the first flexible substrate and the second flexible substrate includes an arm. Another of the first flexible substrate and the second flexible substrate other than the one including the arm includes a slit. The arm is fixed to the slit, causing the linking part to be reinforced.

Abstract: A fault detection system is provided which includes power lines connecting between a DC power supply and electric equipment, switches respectively provided to the power lines, a capacitor connected to the power lines at a position where a distance to the electric equipment is shorter than a distance between the switches and the electric equipment, a charging unit charging the capacitor before the switches are turned on, a detection section connected to the power line at a connecting point where a distance to the DC power supply is shorter than a distance between the switches and the DC power supply, and detecting a change in an electric potential of the connecting point, and a determination section determining whether a short-circuit fault has occurred in any one of the switches based on a difference in the electric potential of the connecting point between before and after the capacitor is charged.

Abstract: A monitoring device includes a monitoring section and a wiring section for electrically connecting the monitoring section and a battery cell. A first and a second electrode terminal groups are reversely arranged. The wiring section includes a first wiring section for electrically connecting the first electrode terminal group and the monitoring section, and a second wiring section for electrically connecting the second electrode terminal group and the monitoring section. The first wiring section has a first substrate and a first wiring pattern, and the second wiring section has a second substrate and a second wiring pattern. The second substrate has a lateral connecting space where a first end side of the second wiring pattern is disposed and a longitudinal connecting space where a second end side of the second wiring pattern is disposed, and the second substrate is bent such that the spaces are opposed to each other.

Abstract: A monitoring system is applied to an electrical system, which includes a DC power source and an electrical apparatus that is connected to the DC power source by a pair of electric power leads incorporating respective switches. To detect leakage current from the DC power source, a low-frequency AC signal is applied via a large-capacitance capacitor to a specific connection position, between a first terminal of the DC power source and the corresponding switch, and the resultant voltage of that signal is measured. To detect a short-circuit failure of one or both of the switches, a high-frequency AC signal is applied via a low-capacitance capacitor to the specific connection position, and the resultant signal voltage is measured. Judgement as to occurrence of leakage current and/or short-circuit failure is based on the measured signal voltage values.

Abstract: A monitoring device includes a first monitoring section that monitors voltages of the plurality of battery cells connected in series and a first wiring section electrically connects the monitoring section and a plurality of battery cells. A first electrode terminal group and a second electrode terminal group in which a plurality of positive terminals and a plurality of negative terminals are aligned and alternate in a longitudinal direction are aligned in a horizontal direction by aligning the plurality of battery cells in the longitudinal direction. The first wiring section is provided with a front wiring section and a back wiring section having a both-end wiring pattern electrically connected to electrode terminals of two battery cells positioned at both ends of the plurality of battery cells aligned in the longitudinal direction and an even-number wiring pattern connected to electrode terminals of even-numbered battery cells in an aligning order.

Abstract: A ground-fault determination apparatus, which is for use in a vehicle power supply system including a DC power source and a DC supply circuit, includes an acquisition unit that applies an AC signal to the DC supply circuit through a series connection of a resistor and a capacitor to acquire a peak value of the AC signal divided by a resistance of the resistor and an insulation resistance of the DC supply circuit, a ground-fault determination unit that determines presence of a ground-fault based on a comparison between a determination threshold and the peak value, an estimation unit that estimates at least one of a maximum output voltage of the DC supply circuit and a common capacitance between the DC supply circuit and a vehicle body, and a setting unit that sets the determination threshold based on at least one of the maximum output voltage and the common capacitance.

Abstract: A voltage detection apparatus includes a supervisory unit that detects terminal voltage of battery cells that constitute a battery module, a high potential path, a low potential path, a differential amplifier that detects terminal voltage of the battery module. First and third switches are provided on the high potential path and second and fourth switches are provided on the low potential line. The voltage detection apparatus includes a bypass resistor that electrically connects the high potential path and the low potential path.

Abstract: A voltage monitoring device has a capacitor circuit having capacitors connected in series, first switches connecting end terminals of the capacitor circuit to specific electrode terminals of unit cells in a battery pack, second switches connecting remaining electrode terminals of the unit cells to the connection nodes between the capacitors, first voltage detection sections corresponding to each of the capacitors, a second voltage detection section connected to the end terminals of the capacitor circuit, and a microcomputer which selectively performs a first process of charging each capacitor, and a second process of charging the capacitors simultaneously. The respective specific electrode terminals correspond to the unit cells, and are arranged at an interval corresponding to the number of connection nodes formed between the capacitors.

Abstract: A voltage detection apparatus is provided which is suitable for an assembled battery including a series connection of battery cells.