Battery module
A battery module which uses a flexible printed circuit board (FPCB) to provide a transmission path of information on the voltage or temperature thereof sensed by a bus bar. The battery module may have a smaller size in a height direction compared to a case of using a rigid printed circuit board (RPCB) or a wire instead of the FPCB to provide the transmission path of the information on the voltage or temperature, and may thus have improved energy efficiency per volume.
1. A battery module comprising:
a plurality of battery cells contained in a case;
a first wire and a second wire configured to output information about the battery module to an external device;
a front bus bar coupled to any one of positive and negative electrode tabs of each of the plurality of battery cells;
a front rigid printed circuit board (RPCB) disposed outside a front support and electrically connected to the front bus bar, wherein the front support supporting both ends of the front bus bar and the front RPCB;
a front flexible printed circuit board (FPCB) has one end electrically connected to the front RPCB and the other end electrically connected to the first wire;
a rear bus bar coupled to another one of the positive and negative electrode tabs of each of the plurality of battery cells;
a rear RPCB disposed outside a rear support and electrically connected to the rear bus bar, wherein the rear support supporting both ends of the rear bus bar and the rear RPCB; and
a rear flexible printed circuit board (FPCB) has one end electrically connected to the rear RPCB and the other end electrically connected to the second wire,
wherein the front bus bar and the front RPCB are disposed parallel to each other in a height direction of the battery module,
wherein the rear bus bar and the rear RPCB are also disposed parallel to each other in the height direction of the battery module,
wherein the front FPCB and the rear FPCB are disposed over the plurality of battery cells, and
wherein the information transmitted to the front FPCB is output to the external device through the first wire, and the information transmitted to the rear FPCB is output to the external device through the second wire.
2. The battery module of claim 1 , further comprising:
a front conductor having one side connected to the front bus bar and another side connected to the front RPCB; and
a rear conductor having one side connected to the rear bus bar and another side connected to the rear RPCB.
3. The battery module of claim 1 , further comprising:
a first connector coupled to each of the front FPCB and the first wire to electrically connect the front FPCB and the first wire to each other; and
a second connector coupled to each of the rear FPCB and the second wire to electrically connect the rear FPCB and the second wire to each other.
4. The battery module of claim 1 , wherein the front FPCB includes a portion formed along a width direction of the battery module and another portion formed along a longitudinal direction of the battery module, and
the rear FPCB also includes a portion formed along the width direction of the battery module and another portion formed along the longitudinal direction of the battery module.
5. The battery module of claim 1 , further comprising a front and rear FPCB support supporting the front FPCB and the rear FPCB by being disposed on a top portion of the plurality of battery cells, and simultaneously, on a bottom portion of the front FPCB and a bottom portion of the rear FPCB.
6. The battery module of claim 1 , further comprising at least one temperature sensor positioned inside the front support or the rear support, and sensing a temperature of at least one battery cell of the plurality of battery cells.
7. The battery module of claim 6 , wherein the temperature sensor is positioned on each of the upper and lower portions of the front support or on each of the upper and lower portions of the rear support.
8. The battery module of claim 6 , further comprising a transmission path FPCB for transmitting temperature information, coupled with the front FPCB or the rear FPCB to provide a transmission path of the information on the temperature sensed by the temperature sensor.
9. The battery module of claim 8 , wherein the transmission path FPCB for transmitting the temperature information includes:
a front temperature FPCB for transmitting front temperature information disposed on the front support, and providing a front support transmission path of the information on the temperature sensed by the temperature sensor positioned inside the front support;
a rear temperature FPCB for transmitting rear temperature information disposed on the rear support, and providing a rear support transmission path of the information on the temperature sensed by the temperature sensor positioned inside the rear support;
a collective FPCB for collecting the temperature information coupled with each of the front temperature FPCB and the rear temperature FPCB to collect the information on the temperature sensed by the temperature sensor positioned inside the front support and the information on the temperature sensed by the temperature sensor positioned inside the rear support; and
a connection FPCB coupled with the collective FPCB, and transmitting the information on the temperature collected by the collective FPCB to the front FPCB or the rear FPCB.
10. The battery module of claim 9 , further comprising a support of the collective FPCB, physically supporting the collective FPCB by being disposed on the top portion of the plurality of battery cells, and simultaneously, on a bottom portion of the collective FPCB.