Bus bar module
A bus bar module includes a plurality of bus bars, a plate-shaped housing case, and a plurality of voltage detection conductors. Each of the bus bars is connected to two or more electrode terminals in an electrode terminal group. The housing case has a plurality of bus bar housing spaces housing the respective bus bars, and has insulation property. The voltage detection conductors are each connected to the bus bars. The bus bars are each disposed in the bus bar housing spaces while separated from the inner peripheral surfaces forming the bus bar housing spaces. The housing case includes a pair of support connecting sections that support the corresponding bus bar with respect to the housing case, in each of the bus bar housing spaces. Each of the support connecting sections has elastic deformation sections allowing elastic deformation in an arrangement direction.
1. A bus bar module comprising:
a plurality of bus bars that are each connected to two or more electrode terminals in an electrode terminal group arranged in a row in a battery module formed of a plurality of battery cells;
a plate-shaped housing case that has a plurality of bus bar housing spaces housing the respective bus bars, and has insulation property; and
a plurality of voltage detection conductors that are each connected to the bus bars, wherein
the bus bars are each disposed in the bus bar housing spaces in a separated state where the bus bars are separated from inner peripheral surfaces forming the bus bar housing spaces,
the housing case includes at least one support connecting section corresponding to each of the bus bar housing spaces, the support connecting section connecting the housing case and the bus bars to each other and supporting the bus bars with respect to the housing case,
the support connecting section has an elastic deformation section that allows elastic deformation at least in an arrangement direction and is directly joined to both the housing case and the corresponding bus bar,
the support connecting section extends between a corresponding one of the inner peripheral surfaces and the corresponding bus bar such that each of the bus bars are separated from the inner peripheral surfaces.
2. The bus bar module according to claim 1 , wherein
the voltage detection conductors serve as a printed circuit body deposited on a surface of the housing case.
3. The bus bar module according to claim 2 , further comprising:
a circuit board that receives voltage information from the voltage detection conductors, wherein
the housing case has a board housing space housing the circuit board, and has a pair of first connectors attached thereto, the pair of first connectors facing each other with the board housing space interposed therebetween and connected to the voltage detection conductors, respectively, and
the circuit board is disposed in the board housing space in a separated state where the circuit board are separated from inner peripheral surfaces forming the board housing space, and is provided with a pair of second connectors engaged with the pair of first connectors.
4. The bus bar module according to claim 3 , wherein
the second connectors are inserted into the first connectors in an insertion direction in which the circuit board is inserted into the board housing space, and
the circuit board is supported with respect to the housing case in an engaged state where the first connectors and the second connectors are engaged with each other.
5. The bus bar module according to claim 1 , wherein
the elastic deformation section is spaced away from each of the corresponding bus bar and the inner peripheral surface.
6. The bus bar module according to claim 1 , wherein
the support connecting section includes a case connector and a bus bar connector, the case connector is connected to and extends from the corresponding one of the inner peripheral surfaces, and the bus bar connector is connected to and extends from the bus bar, and
the elastic deformation section is located between the case connector and the bus bar connector.