Battery management apparatus and battery pack including the same

Patent metadata

Field	Value
Publication number	US-11056732-B2
Application number	US-201816348427-A
Country	US
Kind code	B2
Filing date	Jul 27, 2018
Priority date	Jul 31, 2017
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

A battery management apparatus includes a master BMS and a plurality of slave BMSs connected to the master BMS by means of communication. The master BMS includes a master controller configured to generate operation order information of the plurality of slave BMSs based on state-of-charge information of each of a plurality of battery modules respectively connected to the plurality of slave BMSs. Each of the plurality of slave BMSs includes: a slave communicator configured to receive the operation order information generated by the master controller and receive battery temperature information measured by a temperature measurement sensor; and a slave controller configured to operate a battery cooler by using an output of a corresponding battery module according to a temperature value of the battery temperature information when the operation order corresponds to a first operation order according to the received operation order information or the slave communicator receives a first operation signal from another slave communicator.

First claim

What is claimed is:

1. A battery management apparatus, comprising:
a master battery management system (BMS) and a plurality of slave BMSs connected to the master BMS,
wherein the master BMS includes a master controller configured to generate operation order information of the plurality of slave BMSs based on state-of-charge information of each of a plurality of battery modules respectively connected to the plurality of slave BMSs,
wherein each of the plurality of slave BMSs includes:
a slave communicator configured to receive the operation order information generated by the master controller and receive battery temperature information measured by a temperature measurement sensor; and
a slave controller configured to operate a battery cooler by using an output of a corresponding battery module according to a temperature value of the battery temperature information when an operation order corresponds to a first operation order according to the received operation order information or the slave communicator receives a first operation signal from another slave communicator.

2. The battery management apparatus according to claim 1 , wherein the master controller generates the operation order information based on the state-of-charge information having a greater charge amount.

3. The battery management apparatus according to claim 1 , wherein when the temperature value of the battery temperature information is included in a preset temperature range, the slave controller controls the output of the corresponding battery module so that the output of the corresponding battery module is supplied to the battery cooler.

4. The battery management apparatus according to claim 1 , wherein when a charge amount of the state-of-charge information is equal to or smaller than a preset first charge amount, the slave controller blocks at least one of the output of the corresponding battery module and communication between the slave communicator and the temperature measurement sensor.

5. The battery management apparatus according to claim 1 , wherein when a charge amount of the state-of-charge information is equal to or smaller than a preset first charge amount, the slave controller controls the slave communicator to send the first operation signal to a slave communicator of a slave BMS corresponding to a next operation order according to the operation order information.

6. The battery management apparatus according to claim 1 , wherein when a charge amount of the state-of-charge information is equal to or smaller than a preset first charge amount and the operation order corresponds to a final operation order according to the operation order information, the slave controller controls the slave communicator to send a second operation signal to the slave communicator of the slave BMS corresponding to the first operation order according to the operation order information.

7. The battery management apparatus according to claim 6 , wherein when the slave communicator receives the second operation signal and the charge amount of the state-of-charge information is equal to or smaller than a preset second charge amount that is smaller than the preset first charge amount, the slave controller controls the slave communicator to send a third operation signal to a slave communicator of a slave BMS corresponding to a next operation order according to the operation order information.

8. The battery management apparatus according to claim 7 , wherein when the slave communicator receives the second operation signal or the third operation signal and the temperature value of the battery temperature information is included in a preset temperature range, the slave controller controls the output of the corresponding battery module so that the output of the battery module is supplied to the battery cooler.

9. The battery management apparatus according to claim 7 ,
wherein when the slave communicator receives the second operation signal or the third operation signal and the charge amount of the state-of-charge information is equal to or smaller than the preset second charge amount, the slave controller blocks at least one of the output of the corresponding battery module and the communication between the slave communicator and the temperature measurement sensor.

10. A battery pack, comprising a battery management apparatus defined in claim 1 .

Assignees

• Lg Chemical Ltd

Inventors

• Kim Ji-Eun
• Lee Sang-Hoon
• Choi Yean-Sik

Classifications

• H01M10/486

  for measuring temperature · CPC title

• H01M10/48

  Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) · CPC title

• H01M10/425 Primary

  Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00) · CPC title

• H01M10/613 Primary

  Cooling or keeping cold · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title