AUS
NZ
UK
CA
USA
FRA
GER
ESP
ITA
NLD
PRT
SWE
GRC
IND
POL
BRA
ZAF
RUS
CHN
UAE
“The HSU represents a significant innovation in sensor technology, being the first to combine shunt and Hall effect sensing into a single component. This integration simplifies system architecture, enhances safety, and allows for seamless upgrades without altering the mechanical layout. Additionally, it reduces the total bill of materials (BOM) and minimizes cycle time at the customer's end,” said Jérémie Piro, Product Manager Battery Management Systems and Battery Storage at LEM.
The EV’s high-voltage BMS plays three key roles: it manages the battery’s state of charge and state of health, keeps the system and end user safe, and performs cell balancing as part of the battery optimization process. For higher safety levels, system engineers typically use two separate devices, a shunt to measure 2000A and a current sensor fully isolated for measurements to 2000A.
Now LEM has combined the capabilities and performance of both technologies into a single unit, integrating it into the BDU. The signals from each section – the shunt and the current sensor – are then collected by the BMS.
At BDU level, the HSU allows:
• Minimal footprint, weight and cost (BOM).
• Minimized integration effort for faster time to market; and
• Easy system upgrade, without impacting the mechanical layout while improving safety.
At the BMS level, the HSU enables system developers to easily reach the ASIL D safety level required for EVs.
The shunt’s resistance is very low at 25µΩ, and the Hall part is galvanically isolated, with accuracy of 2% at 500A and 5% at 2000A. Signal communication lines are separated (shunt signal and analogue or digital bus for the Hall part), and there’s NTC (Negative Temperature Compensation) signal for shunt temperature compensation. The current measuring range is up to ±2000A at 10s for both parts, as is the wide operating temperature range of −40°C to +125°C.
The HSU is the only component on the market with two technologies fitted into a standard shunt footprint. It is a plug-and-play unit, allowing easy mounting. LEM initially offers the HSU00 part, with HSU01 to follow in June. The two are suitable for the two most common BDU busbar sizes: 84 x 36 x 3mm (HSU00) and 84 x 20 x 3mm (HSU01). Samples are available now.
LEM plans to expand its HSU lineup, by introducing new technologies, for example combining a shunt with a coreless Hall-effect part. The goal is to continue to shrink the devices’ size and cost yet improve their performance.
*** END ***
LEM – Life Energy Motion
Leading the world in electrical measurement, LEM engineers the best solutions for energy and mobility, ensuring that its customers’ systems are optimized, reliable and safe. With 1,700 people in over 17 countries transforming technology potential into powerful answers, LEM develops and recruits the best global talent, working at the forefront of megatrends such as renewable energy, mobility, automation and digitization. Through its innovative electrical solutions, LEM is helping customers and society accelerate the transition to a sustainable future. Listed on the SIX Swiss Exchange since 1986, the company’s ticker symbol is LEHN.
www.lem.com
Eden Shelley
Napier Partnership
+44 1243 531123
email us here
Visit us on social media:
LinkedIn
X
YouTube
Legal Disclaimer:
EIN Presswire provides this news content "as is" without warranty of any kind. We do not accept any responsibility or liability for the accuracy, content, images, videos, licenses, completeness, legality, or reliability of the information contained in this article. If you have any complaints or copyright issues related to this article, kindly contact the author above.
