US 12,219,694 B2
Battery wiring module
Hideo Takahashi, Mie (JP); and Shinichi Takase, Mie (JP)
Assigned to AUTONETWORKS TECHNOLOGIES, LTD., Mie (JP); SUMITOMO WIRING SYSTEMS, LTD., Mie (JP); and SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 17/773,946
Filed by AUTONETWORKS TECHNOLOGIES, LTD., Mie (JP); SUMITOMO WIRING SYSTEMS, LTD., Mie (JP); and SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
PCT Filed Sep. 30, 2020, PCT No. PCT/JP2020/037166
§ 371(c)(1), (2) Date May 3, 2022,
PCT Pub. No. WO2021/095388, PCT Pub. Date May 20, 2021.
Claims priority of application No. 2019-205196 (JP), filed on Nov. 13, 2019.
Prior Publication US 2022/0377881 A1, Nov. 24, 2022
Int. Cl. H05K 1/02 (2006.01); G01R 31/385 (2019.01); H01M 10/48 (2006.01); H01M 50/209 (2021.01); H01M 50/298 (2021.01); H01M 50/519 (2021.01); H01M 50/569 (2021.01); H05K 1/11 (2006.01); H05K 1/18 (2006.01)
CPC H05K 1/0268 (2013.01) [G01R 31/385 (2019.01); H01M 10/482 (2013.01); H01M 50/209 (2021.01); H01M 50/298 (2021.01); H01M 50/519 (2021.01); H01M 50/569 (2021.01); H05K 1/028 (2013.01); H05K 1/0298 (2013.01); H05K 1/115 (2013.01); H05K 1/18 (2013.01); H05K 1/189 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A battery wiring module to be arranged on a plurality of power storage elements each having an electrode terminal, comprising:
a plurality of connecting members to be connected to the electrode terminals; and
a flexible printed circuit board having a plurality of voltage detection lines for detecting voltages of the plurality of power storage elements via the plurality of connecting members,
wherein at least one of the plurality of voltage detection lines includes a front surface wiring and a back surface wiring respectively formed on a front surface and a back surface of the flexible printed circuit board, and a front-back conduction part passing through the flexible printed circuit board in a plate thickness direction and connecting the front surface wiring and the back surface wiring,
wherein the front-back conduction part includes:
at least one via consisting of a through hole passing through a multilayer wiring region where the front surface wiring and the back surface wiring overlap each other in projection in the plate thickness direction of the flexible printed circuit board, and
a metal plating layer adhered to a peripheral wall of the through hole to form a continuous electrical tubular shape and respectively connected, on an upper end side and a lower end side, to the front surface wiring and the back surface wiring,
wherein the through hole has the continuous electrical tubular shape whose long axis is in a lengthwise direction of the front surface wiring and the back surface wiring, and
wherein the metal plating layer is thicker at both ends of the through hole in the lengthwise direction, such that a resistance value per unit length of the front-back conduction part is less than or equal to a maximum resistance value per unit length of the front surface wiring and the back surface wiring.