Design and experimental verification of voltage measurement circuits based on linear optocouplers with galvanic isolation for battery management systems
Design and experimental verification of voltage measurement circuits based on linear optocouplers with galvanic isolation for battery management systems
A battery management system (BMS) design, based on linear optocouplers for Lithium-ion battery cells for automotive and stationary applications is proposed. The critical parts of a BMS are the input voltages and currents measurement circuits. In this design, they include linear optocouplers for galvanic isolation between the battery pack and the BMS. Optocouplers based on AlGaAs light emitted diodes (LED) and PIN photodiode with external operational amplifiers are used. The design features linear characteristics, to ensure the accuracy of the measurements. The suggested approach is based on graphical data digitalizing, which gives the precise values for the most sensitive parameters: photocurrent, normalized and transferred servo gain and helps the calculation procedure to be automated with MATLAB scripts. Several mathematical methods in the analysis are used in order for the necessary equations to be derived. The results are experimentally verified with prototypes.
1-19
Dimitrov, Borislav
7731fbe8-bd2b-4dd1-8594-75beb831826a
Collier, Gordana
1a9eeacf-b6d7-48ef-9aeb-b45b64239488
Cruden, Andrew
ed709997-4402-49a7-9ad5-f4f3c62d29ab
2019
Dimitrov, Borislav
7731fbe8-bd2b-4dd1-8594-75beb831826a
Collier, Gordana
1a9eeacf-b6d7-48ef-9aeb-b45b64239488
Cruden, Andrew
ed709997-4402-49a7-9ad5-f4f3c62d29ab
Dimitrov, Borislav, Collier, Gordana and Cruden, Andrew
(2019)
Design and experimental verification of voltage measurement circuits based on linear optocouplers with galvanic isolation for battery management systems.
Power Electronics Subsystems, 10 (4), , [59].
(doi:10.3390/wevj10040059).
Abstract
A battery management system (BMS) design, based on linear optocouplers for Lithium-ion battery cells for automotive and stationary applications is proposed. The critical parts of a BMS are the input voltages and currents measurement circuits. In this design, they include linear optocouplers for galvanic isolation between the battery pack and the BMS. Optocouplers based on AlGaAs light emitted diodes (LED) and PIN photodiode with external operational amplifiers are used. The design features linear characteristics, to ensure the accuracy of the measurements. The suggested approach is based on graphical data digitalizing, which gives the precise values for the most sensitive parameters: photocurrent, normalized and transferred servo gain and helps the calculation procedure to be automated with MATLAB scripts. Several mathematical methods in the analysis are used in order for the necessary equations to be derived. The results are experimentally verified with prototypes.
Text
wevj-10-00059
- Version of Record
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Accepted/In Press date: 18 September 2019
e-pub ahead of print date: 23 September 2019
Published date: 2019
Identifiers
Local EPrints ID: 436697
URI: http://eprints.soton.ac.uk/id/eprint/436697
PURE UUID: 3bf1b199-3bfb-46f9-8757-af5faf4020c9
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Date deposited: 20 Dec 2019 18:31
Last modified: 22 Nov 2021 03:03
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Author:
Borislav Dimitrov
Author:
Gordana Collier
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