Sanyo Electric Co., Ltd.

Yasumasa Kojima

Hiroyuki Mihara

Takashi Inamura

Hiroaki Kita

Takashi Yoshida

Voltage detection line includes: first flexible printed circuit board including a plurality of first conductive wires and first insulating film covering the plurality of first conductive wires; second flexible printed circuit board including a plurality of second conductive wires and second insulating film covering the plurality of second conductive wires; and connection part that is soldered to each of first conductive wires and each of second conductive wires corresponding to each other to electrically connect the plurality of first conductive wires and the plurality of second conductive wires, in which the plurality of first conductive wires and the plurality of second conductive wires are electrically connected to a plurality of batteries to detect voltages of the plurality of batteries.

Voltage detection line and voltage detection line module

Voltage detection line includes conductive wire, and tab terminal that electrically connects bus bar electrically connected to output terminal of the battery and conductive wire. Support plate includes base plate on which voltage detection line is placed, and position restricting structure of tab terminal. Position restricting structure includes receiving surface part against which tab terminal abuts, and biasing part that pushes tab terminal toward receiving surface part.

Support plate and voltage detection line module

A method for producing busbar includes a step of applying pressure to pressure-weld a plurality of electric wires in a plurality of first regions in a bundle of the plurality of electric wires, the first regions being arranged at a predetermined interval in the extending direction of the bundle, to form a plurality of terminal joints that are joined to the output terminals of the respective batteries.

Method for producing busbar, busbar, and battery module

Provided is a voltage detection line including conductive wire and insulating film covering conductive wire, and detecting voltage of a battery in order to suppress reconduction of a disconnected voltage detection line. Conductive wire includes low-resistance part having a predetermined electrical resistance value, and high-resistance part having a higher electrical resistance value than an electrical resistance value of low-resistance part and fusing when an overcurrent flows through conductive wire. Insulating film includes high-strength part that covers low-resistance part and has a predetermined strength, and low-strength part that covers high-resistance part and has a strength lower than a strength of high-strength part.

A power supply device including a plurality of battery cells electrically connected with each other by bus bar. The power supply device has a structure where bus bar includes: rod having conductivity and extending in an arrangement direction of the battery cells; and arm being elastically deformable and being connected to rod, arm is configured such that distal end of arm is welded to an electrode terminal of the battery cell, and rear end of arm is connected to rod so as to electrically connect the plurality of battery cells to each other via the rod, arm is formed of a conductive plate that is elastically deformable, deformation gap extending from rear end toward a distal end is formed between arm and rod, and arm is elastically deformable so as to displace distal end to be welded to the electrode terminal.

Growing community of inventors

Hyogo, Japan

Yasumasa Kojima