Flexible wiring component
Included are a first main branch wiring part, a second main branch wiring part, a connection wiring part that connects end parts of the first and second main branch wiring parts, a first sub-branch wiring part branched from an end part of the first main branch wiring part, a second sub-branch wiring part branched from an end part of the second main branch wiring part, and a space part surrounded by the first main branch wiring part, the second main branch wiring part, and the connection wiring part. All the first sub-branch wiring parts and all the second sub-branch wiring parts are formed in a shape such that the first sub-branch wiring parts and the second sub-branch wiring parts do not stack on each other in the space part.
1 . A flexible wiring component, comprising:
a wiring main body in which a voltage detection line group that electrically connects between a battery module where a plurality of battery cells are arranged in a line and a battery monitoring unit that monitors a battery status of each of the battery cells is wrapped in an insulating cover, and that is formed to be flexible and flat, wherein
in each of the battery cells, positive and negative electrode terminals are each disposed on a same flat plane of a cell body with an interval therebetween;
the battery module includes a first electrode terminal group in which first electrode terminals in each of the battery cells are aligned in an arrangement direction of a plurality of the battery cells, and a pair of the first electrode terminals adjacent to each other in the arrangement direction are electrically connected by a first inter-terminal connection component for each of the pair of first electrode terminals, and a second electrode terminal group in which second electrode terminals in each of the battery cells are aligned in the arrangement direction, and a pair of the second electrode terminals adjacent to each other in the arrangement direction are electrically connected by a second inter-terminal connection component for each of the pair of second electrode terminals;
the voltage detection line group includes a first voltage detection line that is provided for each of the first inter-terminal connection component and that electrically connects between the first inter-terminal connection component and the battery monitoring unit, and a second voltage detection line that is provided for each of the second inter-terminal connection component and that electrically connects between the second inter-terminal connection component and the battery monitoring unit;
the wiring main body includes a first main branch wiring part that extends in the arrangement direction close to the first electrode terminal group between the first electrode terminal group and the second electrode terminal group, a second main branch wiring part that extends in the arrangement direction close to the second electrode terminal group between the first electrode terminal group and the second electrode terminal group, a connection wiring part that connects end parts of the first main branch wiring part and the second main branch wiring part and that electrically connects the first main branch wiring part and the second main branch wiring part to the battery monitoring unit, a first sub-branch wiring part for each of the first inter-terminal connection component that is branched from the end part of the first main branch wiring part on the second main branch wiring part side, and that electrically connects the first voltage detection line to the first inter-terminal connection component at a tip end part being branched, a second sub-branch wiring part for each of the second inter-terminal connection component that is branched from the end part of the second main branch wiring part on the first main branch wiring part side and that electrically connects the second voltage detection line to the second inter-terminal connection component at a tip end part being branched, and a space part surrounded by the first main branch wiring part, the second main branch wiring part, and the connection wiring part; and
all the first sub-branch wiring parts and all the second sub-branch wiring parts are formed in a shape such that the first sub-branch wiring parts and the second sub-branch wiring parts do not stack on each other in the space part.
2 . The flexible wiring component according to claim 1 , wherein
the first sub-branch wiring part is folded back from a root part on the first main branch wiring part side toward the first electrode terminal group side by 180 degrees, and electrically connects the first voltage detection line to the first inter-terminal connection component at the tip end part being folded back, and
the second sub-branch wiring part is folded back from a root part on the second main branch wiring part side toward the second electrode terminal group side by 180 degrees, and electrically connects the second voltage detection line to the second inter-terminal connection component at the tip end part being folded back.
3 . The flexible wiring component according to claim 1 , wherein
the battery module includes an exhaust duct that discharges gas discharged from an inside of the battery cell to an outside, between the first electrode terminal group and the second electrode terminal group, and
the wiring main body is installed in the battery module so that the exhaust duct is disposed in the space part.
4 . The flexible wiring component according to claim 2 , wherein
the battery module includes an exhaust duct that discharges gas discharged from an inside of the battery cell to an outside, between the first electrode terminal group and the second electrode terminal group, and
the wiring main body is installed in the battery module so that the exhaust duct is disposed in the space part.
5 . The flexible wiring component according to claim 1 , wherein
the insulating cover includes a base film and a coverlay film for each surface that covers the surface of the base film, and
the voltage detection line group is routed on at least one of the surfaces of the base film.
6 . The flexible wiring component according to claim 2 , wherein
the insulating cover includes a base film and a coverlay film for each surface that covers the surface of the base film, and
the voltage detection line group is routed on at least one of the surfaces of the base film.
7 . The flexible wiring component according to claim 2 , wherein
the insulating cover includes a base film and a coverlay film for each surface that covers the surface of the base film, and the flexible wiring component is provided with
a cut-off part in which at least one of a portion serving as an outside of a bend at each of the root parts of the first sub-branch wiring part and the second sub-branch wiring part in one of the coverlay films, and a portion serving as an inside of a bend at each of the root parts of the first sub-branch wiring part and the second sub-branch part in the other coverlay film is being cut off.
8 . The flexible wiring component according to claim 7 , wherein
between the two surfaces of the base film, the voltage detection line group is routed on at least the surface serving as the inside of the bend at each of the root parts of the first sub-branch wiring part and the second sub-branch wiring part, and
the cut-off part is provided on the portion serving as the outside of the bend at each of the root parts of the first sub-branch wiring part and the second sub-branch wiring part in the one coverlay film.