Battery system
A battery system includes first to N-th battery modules sequentially connected in a daisy chain configuration; and a master controller connected to the first battery module through an interface IC, selecting at least one target module among the first to N-th battery modules, and transmitting a control command for the target module. The target module unidirectionally transmits the control command received from the master controller, and bidirectionally transmits response data generated in response to the control command. The master controller selects the N-th battery module as the target module first, and selects the first battery module as the target module last.
1 . A battery system comprising:
first to N-th battery modules sequentially coupled in a daisy chain configuration; and
a master controller coupled to communicate with the first battery module and configured to select at least one target module among the first to N-th battery modules to transmit a control command for the target module,
wherein the target module transmits the control command received from the master controller, and bidirectionally transmits response data generated in response to the control command, and
the master controller selects the N-th battery module as the target module firstly, and selects the first battery module as the target module lastly,
wherein the master controller is coupled to an interface integrated circuit (IC) to communicate with the first battery module, or the first battery module includes a signal converter, and
wherein the interface IC or the signal converter converts a differential signal to a single-ended signal or converts a single-ended signal to a differential signal.
2 . The battery system of claim 1 , wherein the master controller receives the N-th response data generated by the N-th battery module firstly, and receives the first response data generated by the first battery module lastly.
3 . The battery system of claim 1 , wherein the N-th response data generated by the N-th battery module is transmitted to the master controller through the first to N−1 th battery modules, and
the N−1 th battery module transmits N−1 th response data to the control command bidirectionally after receiving and decoding the N-th response data.
4 . The battery system of claim 3 , wherein the N−1 th battery module transmits the N-th response data to the N−2 th battery module after a predetermined propagation delay time has elapsed from a point in time when the N−1 th battery module starts receiving the N-th response data.
5 . The battery system of claim 3 , wherein the N-th battery module transmits the N-th response data to the N−1 th battery module and a dummy load coupled to the N-th battery module.
6 . The battery system of claim 3 , wherein the N-th battery module transmits the N-th response data to the N−1 th battery module and the master controller coupled to the N-th battery module.
7 . The battery system of claim 1 , wherein each of the first to N-th battery modules includes a module controller and a plurality of battery cells, and the module controller of the first battery module includes the signal converter.