Battery protection integrated circuit and battery management system
The battery protection integrated circuit includes: a higher-level reception terminal configured to receive information from a higher-level circuit; a lower-level transmission terminal configured to transmit information to a lower-level circuit; a storage configured to store a unique identification information; a higher-level signal input terminal configured to be supplied with a permission signal; a lower-level signal output terminal configured to output a second permission signal to the lower-level circuit; a storage controller configured to store a unique identification information when the identification information is not stored, and when the permission signal is supplied; and a switch configured to make the lower-level signal output terminal not provide the second permission signal when the identification information is not stored in the storage, and make the lower-level signal output terminal provide the second permission signal when the identification information is stored in the storage.
1. A battery protection integrated circuit, comprising:
a higher-level reception terminal connected to a transmission terminal of a higher-level circuit that is adjacent in cascade connection, and configured to receive information from the higher-level circuit;
a lower-level transmission terminal connected to a reception terminal of a lower-level circuit that is adjacent in the cascade connection, and configured to transmit information to the lower-level circuit;
a storage configured to store the information received by the higher-level reception terminal as a unique identification information;
a higher-level signal input terminal configured to be supplied with a permission signal indicating permission of communication supplied from the higher-level circuit;
a lower-level signal output terminal configured to output a second permission signal to the lower-level circuit, the second permission signal being generated based on the permission signal supplied to the higher-level signal input terminal;
a storage controller configured to have the information received by the higher-level reception terminal store as a unique identification information in the storage under a condition that the identification information is not stored in the storage, and that the permission signal is supplied to the higher-level signal input terminal; and
a switch configured to put the lower-level signal output terminal to a state in which an output of the second permission signal is not provided when the identification information is not stored in the storage, and put the lower-level signal output terminal to a state in which an output of the second permission signal is provided when the identification information is stored in the storage.
2. A battery protection integrated circuit according to claim 1 ,
wherein the identification information has a signal based on identification information of the higher-level circuit, and
wherein the lower-level transmission terminal is configured to transmit identification information of the lower-level circuit which is generated based on the identification information received by the higher-level reception terminal to the lower-level circuit.
3. A battery protection integrated circuit according to claim 1 ,
wherein the identification information is determined in advance by a circuit arranged at a highest level among the higher-level circuits, and
wherein the lower-level signal output terminal is configured to transmit the identification information received by the higher-level reception terminal to the lower-level circuit.
4. A battery protection integrated circuit according to claim 2 ,
wherein the identification information is determined in advance by a circuit arranged at a highest level among the higher-level circuits, and
wherein the lower-level signal output terminal is configured to transmit the identification information received by the higher-level reception terminal to the lower-level circuit.
5. A battery protection integrated circuit according to claim 1 , wherein the switch is configured to switch, when the identification information stored in the storage is identification information of a lowest-level circuit, the lower-level signal output terminal to the state of stopping outputting the second permission signal.
6. A battery protection integrated circuit according to claim 2 , wherein the switch is configured to switch, when the identification information stored in the storage is identification information of a lowest-level circuit, the lower-level signal output terminal to the state of stopping outputting the second permission signal.
7. A battery protection integrated circuit according to claim 3 , wherein the switch is configured to switch, when the identification information stored in the storage is identification information of a lowest-level circuit, the lower-level signal output terminal to the state of stopping outputting the second permission signal.
8. A battery management system, comprising:
a plurality of battery protection integrated circuits of claim 1 ; and
a master device,
the master device and the plurality of battery protection integrated circuits being cascade-connected to serially communicate with one another.
9. A battery management system, comprising:
a plurality of battery protection integrated circuits of claim 2 ; and
a master device,
the master device and the plurality of battery protection integrated circuits being cascade-connected to serially communicate with one another.
10. A battery management system, comprising:
a plurality of battery protection integrated circuits of claim 3 ; and
a master device,
the master device and the plurality of battery protection integrated circuits being cascade-connected to serially communicate with one another.
11. A battery management system, comprising:
a plurality of battery protection integrated circuits of claim 4 ; and
a master device,
the master device and the plurality of battery protection integrated circuits being cascade-connected to serially communicate with one another.