Battery pack
Provided is a battery pack, which can prevent a plurality of battery modules from being abnormally assembled. The battery pack may include n battery modules; n slave battery management systems (BMSs) corresponding to the n battery modules, the n slave BMSs respectively and sequentially coupled to each other; and a master BMS coupled to the n slave BMSs. Here, the master BMS is configured to apply a trigger signal to a first slave BMS, the first to (n−1)th slave BMSs are configured to transmit the trigger signal and first to (n−1)th signals, which are different from each other, to a next slave BMS, an nth slave BMS is configured to transmit an nth signal to the master BMS.
1. A battery pack, the battery pack comprising:
n battery modules;
n slave battery management systems corresponding to the n battery modules, the n slave battery management systems respectively and sequentially coupled to each other; and
a master battery management system coupled to the n slave battery management systems,
wherein the master battery management system is configured to apply a trigger signal to a first slave battery management system of the n slave battery management systems,
wherein the first to (n−1)th slave battery management systems are configured to transmit the trigger signal and first to (n−1)th signals including different connection error order information for indicating whether the slave battery management systems are connected in order, which are different from each other, to a next slave battery management system of the n slave battery management systems,
wherein an nth slave battery management system of the n slave battery management systems is configured to transmit an nth signal to the master battery management system, and
wherein n is an integer greater than or equal to two.
2. The battery pack of claim 1 , wherein the master battery management system is configured to compare the nth signal with a reference value and to determine the n battery modules are normally connected when the nth signal is equal to the reference value.
3. The battery pack of claim 1 , wherein the master battery management system is configured to compare the nth signal with a reference value and to determine that the n battery modules are abnormally connected when the nth signal is not equal to the reference value.
4. The battery pack of claim 1 , wherein the trigger signal and the first to nth signals have different frequencies.
5. The battery pack of claim 1 , wherein the first to nth signals have intrinsic ID values for the respective first to nth slave battery management systems.
6. The battery pack of claim 1 , wherein the first signal is an inversion signal of the trigger signal, and the second to nth signals are inversion signals of preceding signals.
7. A battery pack, the battery pack comprising:
n battery modules;
n slave battery management systems corresponding to the n battery modules, the n slave battery management systems respectively and sequentially coupled to each other; and
a master battery management system coupled to the n slave battery management systems,
wherein the master battery management system is configured to apply a trigger signal to a first slave battery management system of the n slave battery management systems,
wherein the first to (n−1)th slave battery management systems are configured to transmit the trigger signal and first to (n−1)th signals, which are different from each other, to a next slave battery management system of the n slave battery management systems,
wherein an nth slave battery management system of the n slave battery management systems is configured to transmit an nth signal to the master battery management system,
wherein n is an integer greater than or equal to two,
wherein the first slave battery management system is configured to store the trigger signal of the master battery management system as a reference value, and
wherein the second to nth slave battery management systems are configured to store input signals to be applied from a preceding slave battery management system of the n slave battery management systems as reference values.
8. The battery pack of claim 7 , wherein the first to nth slave battery management systems are configured to compare input signals applied from the master battery management system or the preceding slave battery management system with the reference values.
9. The battery pack of claim 8 , wherein the first to nth slave battery management systems are configured transmit an error signal to the master battery management system when the input signals are not equal to the reference values.
10. The battery pack of claim 8 , wherein when the input signals are not equal to the reference values, the first to (n−1)th slave battery management systems are configured to transmit an error signal to the next slave battery management system, and the nth slave battery management system connected at a last stage is configured to transmit the error signal to the master battery management system.
11. The battery pack of claim 8 , wherein the first to (n−1)th slave battery management systems are configured to transmit no signal to the next slave battery management system when the input signals are not equal to the reference values.
12. The battery pack of claim 11 , wherein after transmitting the trigger signal, the master battery management system is configured to measure a time duration and to determine that the battery modules are abnormally connected when no signal is received from the n slave battery management systems within a reference time.