Infineon TLE9012DQU & TLE9015DQU Battery Monitoring Transceiver ICs
Optimize system performance by cell balancing and monitoring key battery parameters
Infineon‘s TLE9012DQU and TLE9015DQU battery monitoring transceiver ICs are a perfect match with customer system needs.
TLE9012DQU is a multi-channel Li-ion battery monitoring and balancing system IC designed for Li-Ion battery packs used in many applications in the automotive world (electric vehicles of any kind MHEV, HEV, PHEV and BEV, etc.); industrial (Energy storage systems) and consumer (i.e. e-bike BMS, home energy storage, etc).
TLE9015DQU is a Transceiver IC designed for connecting several TLE9012DQU devices in a daisy chain.
Based on Infineon state of the art technologies, the sensing ICs are capable of accurately measuring voltages and temperatures inside the battery as well as reliably communicating them to the main controller by using the BMS daisy chain transceiver IC.
More Information: Designing a Battery Management System (BMS)
When designing a BMS, the designer often starts with the cell monitoring and balancing (CMB) device. The CMB device is also known as the BMS IC or Analog Front End (AFE).
Often located on a Cell Management Controller (CMC) unit, the CMB’s function is to measure the voltages and temperatures for cells and communicate this information to the main controller. Additionally, the CMB can undertake diagnostics of cells and their surrounding (for example, detecting connection failures in the circuit surrounding a cell such as open or short circuits). The values monitored by the CMB are then used to:
- Check if the cells are always operating within their safe operating area (SOA) and report if they reach their SOA limits
- Measure the voltages of the cells for the state of charge (SoC)
- Report the cell temperatures for the thermal management of the pack
The CMB device is also responsible for balancing the cells. Cell imbalance comes from the fact that high voltage batteries are built out of many single cells in series, which inevitably have production variances, for example in cell characteristics or the heterogeneous thermal spreads in the final pack.
Additionally, to achieve extreme low-power dedicated housekeeping functions such as periodically scheduled cell measurements and state analysis required for functional safety can be performed by the CMB independently from the master controller of the BMS. Safety features for signaling over-/under-voltage, thermal stress, etc. including emergency alarms are triggered autonomously.
Infineon Typical BMS Diagram
There are two main CMB topologies that are characterized by cell count and isolation requirements. The higher the series cell count of a battery pack the more the CMB devices are required to be stacked. This means that CMB devices might need to be isolated, especially in High Voltage BMSs where the battery pack needs to be isolated at all times and the master controller is connected to the 12V domain.
Infineon TLE9012DQU Li-Ion Battery Monitoring and Balancing IC
The TLE9012DQU is a multi-channel battery monitoring and balancing IC designed for Li-Ion battery packs used in many applications on the automotive world (electric vehicles of any kind MHEV, HEV, PHEV and BEV, etc ), industrial (Energy storage systems) and consumer (i.e. e-bike BMS, home energy storage, etc ). TLE9012DQU fulfills four main functions: cell voltage measurement, temperature measurement, cell balancing and isolated communication to main battery controller. Additionally, TLE9012DQU provides the necessary diagnostic tools to ensure proper function guaranteeing the safety of the persons around the controlled battery.
TLE9012DQU Block Diagram
Infineon TLE9012DQU Evaluation Board
The evaluation board features the Li-Ion battery monitoring and sensing IC TLE9012DQU based on distributed architecture including cabling and necessary SW for Infineon AURIX™ Microcontroller.
Infineon TLE9015DQU iso UART Transceiver IC
The TLE9015DQU is a battery monitoring transceiver IC designed for connecting several TLE9012DQU devices in a daisy chain inside a Li-Ion battery. By means of its two UART and iso UART interface pairs it can support ring communication improving the availability of the system by a low cost.
It also enables bidirectional information flow by including an error management unit including several inputs and outputs that are programmable on each TLE9012DQU.
TLE9015DQU Block Diagram
Infineon TLE9015QU Evaluation Board
The evaluation board features the iso UART Transceiver IC TLE9015DQU based on distributed architecture including cabling and necessary software for Infineon AURIX™ Microcontroller.