Sanyo Electric Co., Ltd.

Yoshitomo Nishihara

Tsuyoshi Watanabe

Kazumi Ohkura

Kenji Taguchi

Keiji Kishimoto

Yasuhiro Asai

Yutaka Miyazaki

A power source device has: battery cells respectively having electrode terminals; a rigid circuit board including a detection circuit for detecting states in the battery cells; a FPC electrically connecting the electrode terminals and the detection circuit; and, connecting members provided at a tip of the PFC, electrically connecting the battery cells and the FPC. The FPC has fixing portions fixed to the rigid circuit board. The fixing portions include: a signal line connecting portion having conductive foils of which one side ends are fixed to the rigid circuit board, which electrically connect the electrode terminals and the detection circuit; and a reinforcing portion having a fixing metal foil of which one side end is fixed to the rigid circuit board, which is insulated from the electrode terminals. The signal line connecting portion has a connecting area overlapping the rigid circuit board.

Power source device

A power supply device in which bars BB extend in one direction and connect the terminals of the battery cells adjacent to each other. The lines () are electrically connectable to the bars BB. The tabs TB electrically connect the bars BB to the lines (). The bar BB is formed of a clad plate formed of a first metal (A) and a second metal (B). The bar BB includes first and second holders (and), and a tab holder. The first and second holders (and) are arranged in the first and second metals, respectively, and hold the terminals at holding positions. The tab holder is arranged in the first metal (A), and holds the tab TB at a holding position. The impedance between the first holder () and the tab holder is substantially equal to the impedance between the tab holder and the second holder ().

Power supply device and vehicle including power supply device

A power supply device has a first monitoring portion monitoring one battery property of plural battery cells constituting a battery block, a second monitoring portion monitoring another battery property, a circuit board having a monitoring circuit monitoring states of the battery cells being connected to the first and second monitoring portions and based on battery property information detected in the first and second monitoring portions and having a rectangular shape in the external appearance, a first connector connecting a first harness extended from the first monitoring portion to the circuit board, and a second connector connecting a second harness extended from the second monitoring portion to the circuit board. The first connector is fixed to one side of the circuit board, and the second connector is fixed to another side crossing the one side of the rectangular outer shape at a position thereof crossing the second connector.

Power supply device, circuit board, and vehicle and storage battery device equipped with power supply device

A battery module includes a battery block, a cover member, a circuit board, a wiring member, and a first connection member. The battery block includes a plurality of battery cells, and has a terminal surface. Terminals of the plurality of battery cells are arranged on the terminal surface. The cover member is arranged on or above the terminal surface of the battery block. The circuit board overlaps the cover member, and includes a voltage detection circuit for detecting terminal voltages of the plurality of battery cells. The wiring member overlaps the cover member, and is electrically connected to the terminals of the plurality of battery cells. The first connection member electrically connects the circuit board to the wiring member.

Battery module, battery system, electric vehicle, mobile unit, electric power storage device, power supply device, and electric device

A battery system comprises plural battery cells, a voltage detecting circuit detecting voltage of each of the battery cells, and plural voltage detecting lines connecting an electrode terminal of each of the battery cells to input side of the voltage detecting circuit, and the voltage detecting circuit detects the voltage of each of the battery cells through the voltage detecting lines. The voltage detecting lines have different lengths, and at least one of the voltage detecting lines has a resistance adjusting portion which equalizes electrical resistances of the long voltage detecting line and the short voltage detecting line, and through the plural voltage detecting lines of which electrical resistances are equalized by the resistance adjusting portion, the voltage detecting circuit detects the voltage of each of the battery cells.

Battery system including a voltage detecting circuit for detecting voltages of plural battery cells through voltage detecting lines having different lengths

A battery block composed of a plurality of battery cells and a voltage detecting circuit (state detecting circuit) for detecting a voltage between terminals of each battery cell are included, and a flexible printed circuit board, in which a voltage detecting line for electrically connecting a positive electrode terminal or a negative electrode terminal of the battery cell and the voltage detecting circuit (state detecting circuit) is integrated with a substrate made or a flexible material, is provided.

Growing community of inventors

Osaka, Japan

Yoshitomo Nishihara