BMS ICs boost battery life

BMS ICs boost battery life

New Products |
By Christoph Hammerschmidt

The new Infineon BMS chips combine excellent measurement performance with highest application robustness and are a competitive system-level solution for battery modules, cell-to-pack and cell-to-car battery topologies. The devices are suitable for a wide range of automotive applications such as mild hybrid electric vehicles (MHEV), hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV) and battery electric vehicles (BEV), but can also be used in industrial and consumer electronics applications. Energy storage systems and battery management systems for electric two- and three-wheelers are also supported.

These ICs can also be used for safety-relevant applications: The automotive BMS solutions meet safety requirements up to ASIL-D and are also ISO26262-compliant. Furthermore, thanks to the Complex Device Driver, the products are optimised to work with microcontrollers from Infineon’s Aurix family and power management ICs with functional safety. This provides a complete solution for voltage and temperature measurement, balancing and communication across a wide range of battery solutions.

The TLE9012DQU multi-channel battery monitoring and balancing system IC is able to perform high-precision voltage measurements for accurate State of Charge (SoC) and State of Health (SoH) calculations – key requirements for any BMS. In addition, the device is an ASIL-D compliant monitoring and balancing IC designed for lithium-ion battery packs. It can be controlled directly by a microcontroller via UART or via an isolated UART interface with the new TLE9015DQU iso-UART transceiver IC.

The design of the TLE9012DQU is based on a parallel ADC architecture. This enables high accuracy through 16-bit DS ADC technology, high noise rejection through high internal oversampling and advanced sync-on-sample with less than 10 µs for a whole battery pack at a time. In addition, dependence on external components for lifetime accuracy can be reduced or eliminated.

The TLE9015DQU is a battery monitoring transceiver IC designed to connect multiple TLE9012DQU devices in a daisy chain within a Li-ion battery. The device uses its two UART and Iso-UART interface pairs to support ring communication, improving the cost efficiency of the system. By integrating a fault management unit with multiple inputs and outputs programmable on each TLE9012DQU, the module also enables bidirectional information flow.


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