Master battery management unit and battery pack including same

Patent metadata

Field	Value
Publication number	US-2019361075-A1
Application number	US-201816476777-A
Country	US
Kind code	A1
Filing date	Jun 14, 2018
Priority date	Jul 25, 2017
Publication date	Nov 28, 2019
Grant date	—

Abstract

A master battery management unit including a sensing unit generating pack information of the battery pack, a first master power supply unit generating a first operating voltage using voltage of the battery pack, a communication unit outputting a first switching signal in response to the first operating voltage supplied from the first master power supply unit, a second master power supply unit generating a second operating voltage using the pack voltage in response to the first switching signal, and a control unit operating using the second operating voltage supplied from the second master power supply unit, and testing a preset item based on at least one of the pack information and module information.

First claim

1 . A master battery management unit for a battery pack including a plurality of battery modules and a plurality of slave battery management units installed in the plurality of battery modules one-to-one, the master battery management unit comprising:
a sensing unit configured to detect an electrical parameter including a pack voltage of the plurality of battery modules of the battery pack, and generate pack information based on the detected electrical parameter; a first master power supply unit configured to generate a first operating voltage using the pack voltage supplied from the plurality of battery modules; a communication unit including an antenna and a wireless communication circuit operably connected to each other, and configured to operate using the first operating voltage supplied from the first master power supply unit, and output a first switching signal in response to the first operating voltage; a second master power supply unit configured to generate a second operating voltage using the pack voltage supplied from the plurality of battery modules in response to the first switching signal; and a control unit configured to operate using the second operating voltage supplied from the second master power supply unit, and test a preset item based on at least one of the pack information and module information from the plurality of slave battery management units.

2 . The master battery management unit according to claim 1 , further comprising:
a third master power supply unit configured to generate a third operating voltage using the second operating voltage supplied from the second master power supply unit, wherein the control unit is further configured to operate using the third operating voltage.

3 . The master battery management unit according to claim 1 , further comprising:
an isolation unit configured to relay communication between at least one of the plurality of slave battery management units, the sensing unit and the communication unit and the control unit.

4 . The master battery management unit according to claim 1 , wherein the control unit is configured to output the first switching signal independently of the communication unit while the control unit is in operation.

5 . The master battery management unit according to claim 4 , further comprising:
an OR circuit including a first input terminal, a second input terminal and an out terminal, wherein the first input terminal of the OR circuit receives an input of the first switching signal from the communication unit, the second input terminal of the OR circuit receives an input of the first switching signal from the control unit, and the output terminal of the OR circuit outputs the first switching signal from the communication unit or the first switching signal from the control unit to the second master power supply unit.

6 . The master battery management unit according to claim 1 , wherein the control unit is configured to stop outputting the first switching signal and output a second switching signal that is independent of the first switching signal when the control unit is electrically connected to an auxiliary power source provided in an object in which the battery pack is mounted, and
the first master power supply unit is configured to stop generating the first operating voltage supplied for operation of the communication unit in response to the second switching signal.

7 . The master battery management unit according to claim 1 , wherein the communication unit is configured to transmit a RF signal indicating a result of the test to an external operator terminal through the antenna and the wireless communication circuit.

8 . A battery management system comprising:
the master battery management unit according to claim 1 .

9 . A battery pack comprising:
the battery management system according to claim 8 .

Assignees

• Lg Chemical Ltd

Inventors

• Lee Keun-Wook
• Lee Sang-Hoon
• Cho Hyun-Ki
• Choi Yean-Sik

Classifications

• H02J1/106

  for load balancing, symmetrisation, or sharing · CPC title

• H02J1/102

  being switching converters (H02J1/108, H02J1/12 take precedence) · CPC title

• H01M2010/4278

  Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H02J13/1331

  using wireless data transmission · CPC title