Functional Safety for Battery Monitoring Integrated Circuits

Paper #:
  • 2017-01-1202

Published:
  • 2017-03-28
Author(s):
Affiliated:
Abstract:
The Battery Monitoring Integrated Circuit (BMIC) is a key technology for Battery Electronics in the electrification of vehicles. Generally speaking, every production hybrid, plug-in hybrid, and battery electric vehicle uses some type of BMIC to monitor the voltage of each lithium battery cell. In order to achieve Functional Safety for the traction battery packs for these electrified vehicles, most designs require higher ASIL ratings for the BMIC such as C or D. For the entire market of available BMIC’s, there is a generic feature set that can be found on almost every IC on the market, such as a front end multiplexer, one or more precision references, one or more Analog to Digital (A/D) converters, a power supply, communications circuits, and window comparators. There is also a fairly consistent suite of self-diagnostics, available on just about every available BMIC, to detect failures and enable achievement of the appropriate ASIL rating. This paper provides a generic approach for the use of these BMICs which is independent of the exact vehicle application and which is applicable to BMIC’s from all vendors. The functional safety concept which can be found in Battery Controller modules across OEM’s is explained. Then, the usage of diagnostic features for these BMICs is examined in detail which is the final piece necessary to understand the technical safety requirements for battery pack electronics. Special emphasis is placed on the relationship between the specific diagnostic features which are offered by the silicon suppliers, and the implementation of these technical safety requirements.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Attention: This item is not yet published. Pre-Order to be notified, via email, when it becomes available.
Select
Price
List
Download
$22.00
Mail
$22.00
Members save up to 36% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Technical Paper / Journal Article
2003-06-17
Technical Paper / Journal Article
2003-06-17
Training / Education
2015-10-21
Training / Education
2014-09-10
Technical Paper / Journal Article
2003-06-17