Sanyo Electric Co., Ltd.

Kuniho Tanaka

Kimihiko Furukawa

Jyunya Yano

Junya Yano

Shoichi Toya

Hiroshi Tatsumi

Toru Mizuta

Masato Takami

The power source apparatus is provided with a plurality of modules (), and a main controller () connected with communication interface units () in each module via a communication line CB. Each module is provided with a battery block () having a plurality of battery cells () stacked together and connected in series and/or parallel, a battery state detection section () to detect the state of the battery cells, communication interface units for data communication with other modules and the main controller, and a memory section () that can store data received through the communication interface units. The plurality of modules are connected in series and/or parallel with an output line OL.

Power source apparatus, vehicle and power storage system using the power source apparatus

The car battery system of the present invention is provided with a battery blockthat retains a plurality of battery cellsin a stacked configuration and has a terminal planeA, which is coincident with terminal surfacesA established by positive and negative battery cellelectrode terminals; and with a battery state detection circuitthat connects with the electrode terminalsof each battery cell. The battery system is provided with a circuit boardwith surface-mounted electronic componentsthat implement the battery state detection circuit. The circuit boardis a single-sided board with electronic componentsmounted on only one side, and the circuit boardis attached to the battery blockopposite the terminal planeA with the side having no electronic componentsfacing the battery block. The positive and negative electrode terminalsof each battery cellare connected with the circuit boardfor connection to the battery state detection circuit

Car battery system

A car battery system includes a plurality of battery cells, each battery cell having a positive electrode terminal and a negative electrode terminal, a battery block that retains the plurality of battery cells in a stacked configuration and has a terminal surface that is formed by battery cell terminal surfaces established by the positive and negative electrode terminals, and a battery state detection circuit that is connected to the electrode terminals of each battery cell to detect the condition of each battery cell. The positive and negative electrode terminals of each battery cell are connected to a circuit board and to the battery state detection circuit. The circuit board is connected to the positive and negative electrode terminals of each battery cell via voltage detection lines, and the voltage detection lines are connected to the same locations on the electrode terminals of each battery cell.

The battery system is provided with a batterythat can be recharged, a fuseconnected to the batterythat blows with excessive current flow, relaysconnected to the output-side of the batteryand a current cut-off circuitthat detects excessive batterycurrent and controls the relaysThe current cut-off circuitdetects excessive batterycurrent, and is provided with a timer sectionthat designates a time delay until the relaysare switched from ON to OFF. For the delay time of the timer sectionthe fusing current of the fuseis set lower than the maximum cut-off current of the relaysand higher than the maximum allowable batterycharging and discharging current. In a situation where excessive current greater than the maximum cut-off current of the relaysflows through the batterythe fuseis blown during the timerdelay time, and the current cut-off circuitswitches the relaysfrom ON to OFF when the delay time has elapsed.

Battery system with relays

A power source apparatus for an electric automobile is provided with a battery system, having a driving battery to power an automobile driving motor and a battery control circuit to control driving battery charging and discharging as well as to compute driving battery remaining capacity, and an accessory battery to power automobile electrical accessories. When the automobile is in the stationary state a, charging circuit, which controls charging between the driving battery and accessory battery, charges the driving battery to a specified state with accessory battery power. The battery control circuit corrects the value of driving battery remaining capacity to a specified battery capacity, and subsequently charges the accessory battery with the driving battery to bring driving battery remaining capacity to a specified level.

Growing community of inventors

Kasai, Japan

Kuniho Tanaka