Enabling designers of lithium-ion battery management systems (BMS) in the automotive sector to achieve the maximum range of electric vehicles (EVs) is the goal of LEM, company specialized in electrical measurement technology, announcing its new CAB 1500 current sensor, which offers the best performance for accurately measuring battery charge level.
One of the biggest challenges for the EV industry is the need to develop vehicles that can travel the longest possible distance between charges, so design engineers are continually looking for sensors that can achieve the high levels of efficiency and accuracy they require.
The CAB 1500 is the novelty within LEM's CAB series, made up of automotive sensors that take advantage of the properties of magnetic induction transducer technology to provide the high accuracy and low offset required to accurately count Coulombs. reliable, by measuring the discharge current of the Li-ion batteries in order to estimate their state of charge. The CAB series stands out due to its compliance with the ISO 26262 functional safety standard (according to automotive safety integrity level C) as well as its simple application via a 500 kbps CAN (controller area network) interface. .
The CAB 1500 open-loop magnetic induction sensor, which is backed by LEM's 50 years of experience in the development of electrical measurement solutions, incorporates electronic mechanisms and software that guarantee the high levels of reliability required by BMS. The sensor can be mounted on the busbar or panel and provides both the best resolution, down to 0,1%, along with the lowest offset and highest accuracy in this market segment.
In addition to its extended current range up to ±1500A and compatibility with 800V applications per IEC 60664-1, the new sensor is capable of non-intrusive measurements for full galvanic isolation up to 2,5kV. Other features of the sensor are its low consumption VS bypass technology and its total error of 0,5% for temperatures from -40°C to +85°C.
Jérémie Piro, Global Product Manager for BMS and Battery Storage, notes: “Accurately measuring battery charge level is a crucial factor in achieving maximum range for electric vehicles and design engineers will welcome this novelty within the LEM CAB family, which offers the levels of performance they need. The CAB 1500 uses magnetic induction technology to provide the best state-of-charge estimates in today's market for advanced EV battery management systems and will play a key role in enabling electric vehicles to travel longer distances than ever before."
