Method and system for allocating identifiers to multi-slave in battery pack

• US 8,963,507 B2
• Filed: 12/05/2013
• Issued: 02/24/2015
• Est. Priority Date: 09/05/2011
• Status: Active Grant

• Current Assignee: LG Energy Solution Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Kim, Ju-Young, Ko, Jong-Kyung, Kim, Hyun-Jin, Kim, Ji-Hun
• Primary Examiner(s): Muralidar, Richard V
• Application Number:
  US14/097,913
• Publication Number:
  US 20140091769A1
• Time in Patent Office: 446 Days
• Field of Search: 320/162, 324/426, 324/433, 340/455, 340/636.1, 340/636.12, 340/636.15, 340/636.19, 340/636.2
• US Class Current: 320/162
• CPC Class Codes: H01M 10/4257 Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
• CPC Class Codes: H01M 2010/4271 Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: H04L 2101/604 Address structures or formats
• CPC Class Codes: H04L 61/5038 for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

Disclosed is a method and system for allocating identifiers to multi-slaves in a battery pack. The method for allocating identifiers, in which a master battery management system (BMS) allocates identifiers to N (N is an integer of 2 or above) number of slave BMSs through a communication network, includes (a) by each slave BMS, generating an initial identifier by combining digital voltage measurement values of battery cells included in a battery module managed by the slave BMS and transmitting the initial identifier to a master BMS; and (b) by the master BMS, allocating identifiers again according to the initial identifier received from each slave BMS and then transmitting the identifiers to slave BMSs. Therefore, it is possible to allocate identifiers without inputting an identifier to a multi-slave BMS in advance or using a separate hardware configuration.

Claims

1. A method for allocating identifiers, in which a master battery management system (BMS) allocates identifiers to N (N is an integer of 2 or above) number of slave BMSs through a communication network, the method comprising:

(a) by each slave BMS, generating an initial identifier by combining at least one bit selected from a lower bit region among digital voltage measurement values of battery cells included in a battery module managed by the slave BMS and transmitting the initial identifier to a master BMS; and

(b) by the master BMS, allocating identifiers again according to the initial identifier received from each slave BMS and then transmitting the identifiers to slave BMSs.

2. The method for allocating identifiers according to claim 1,

wherein in the step (a), each slave BMS generates an initial identifier by combining one lowest bit or two lowest bits among the digital voltage measurement values of the battery cells included in the battery module managed by the slave BMS.

3. The method for allocating identifiers according to claim 1,

wherein in the step (a), the slave BMSs transmit the initial identifiers to the master BMS in ascending order of values of the initial identifiers.

4. The method for allocating identifiers according to claim 1, further comprising:

in the case the master BMS does not receive N number of initial identifiers from the slave BMSs within a preset time, by the master BMS, receiving an initial identifier again from each slave BMS.

5. The method for allocating identifiers according to claim 1,

wherein in the step (b), the master BMS allocates identifiers again in ascending order of values of the initial identifiers received from the slave BMSs and then transmits the identifiers to the slave BMSs.

6. The method for allocating identifiers according to claim 1,

wherein in the step (a), the communication network is a controller area network (CAN).

7. A system for allocating identifiers, comprising:

N number of slave BMSs, each of which generates an initial identifier by combining at least one bit selected from a lower bit region among digital voltage measurement values of battery cells included in a battery module managed by the slave BMS and transmits the initial identifier to a master BMS through a communication network; and

a master BMS for allocating identifiers again according to the initial identifier received from each slave BMS and then transmitting the identifiers to the slave BMSs through the communication network.

8. The system for allocating identifiers according to claim 7,

wherein each slave BMS generates an initial identifier by combining one lowest bit or two lowest bits among the digital voltage measurement values of the battery cells included in the battery module managed by the slave BMS.

9. The system for allocating identifiers according to claim 7,

wherein the slave BMSs transmit the initial identifiers to the master BMS in ascending order of values of the initial identifiers.

10. The system for allocating identifiers according to claim 7,

wherein in the case the master BMS does not receive N number of initial identifiers from the slave BMSs within a preset time, the master BMS receives an initial identifier again from each slave BMS.

11. The system for allocating identifiers according to claim 7,

wherein the master BMS allocates identifiers again in ascending order of values of the initial identifiers received from the slave BMSs and then transmits the identifiers to the slave BMSs.

12. The system for allocating identifiers according to claim 7,

wherein the communication network is a controller area network (CAN).