A cell is the smallest, packaged form of a battery. A battery module consists of several cells that are assembled in a series or in parallel. A multi-module battery (battery pack) is created by connecting several modules together. Single-module batteries are typical for applications with voltage ranges not exceeding the 150 V, such as battery-powered tools, vacuum cleaners, multicopter, robots, e-scooters, e-bikes, low voltage telecom, and server UPS. In the case of multi-module batteries, the Battery Management System (BMS) monitors and controls all processes impacting the battery.
Single-module batteries above 60V
Single-module batteries below 60V
Single-module batteries below 60V have relaxed isolation requirements. Therefore the above block diagram for single-module batteries can be further simplified: Dedicated isolation domains and galvanically isolated communication links between the cells and the BMS controller are no longer mandatory. Also, functional safety constraints are significantly relaxed, which allows using non-safety certified e.g. auxiliary power supplies.
Typical uses cases for single-module batteries in this segment are battery-powered drives e.g. in drones or power tools. Infineon offers an excellent selection of devices for power management and consumption, as well as voltage regulation – such as power MOSFETs (e.g. CoolMOS™ and OptiMOS™), microcontrollers, EiceDRIVER™ gate drivers and more.
For a full overview of the available Infineon devices, check also the interactive block diagram of the single-module battery for the higher voltages from above, which provides a superset of the required functions.
Battery protection enhances the useful operating life of lithium-ion batteries by protecting the battery pack against charge current, discharge current, and pack short fault conditions. Learn more about battery protection.
Besides current, voltage and temperature measurements advanced analytics are performed on pack-level with respect to thermal, electrical and mechanical strain: Highly accurate pressure sensing allows to observe the possible extension of cell housing as a result of overload/-charge condition or detection of mechanical impacts on the pack‘s mechanical structure. Sensing of evaporated CO2 from the cell’s electrolyte as a result of cell aging or overstress could be a vital indicator for battery health. Finally, a combination of the pressure of condition sensors allows for the detection of unauthorized pack manipulations e.g. for modification or replacement of cells by measuring variations in pressure or 3D magnetic structures.
In this training you will:
- Identify the aspects covered by the battery management systems (BMS), their main components and their function
- Recognize Infineon’s main components for battery management applications and the key features and benefits of Infineon battery management devices
Getting the most out of batteries. By the end of this decade, the majority of new cars sold around the world is expected to have a partially or fully electric drivetrain. Battery management systems have a great impact on the range, cost and service life of electric vehicles, which makes them a key success factor for this mobility revolution. Furthermore, they play an essential role when it comes to second-life concepts that allow former EV batteries to be used as flexible storage for renewable energy, for example. Dr. Clemens Mueller exclusively explains in-depth market trends and challenges, provides details on Infineon products and solutions, and introduces the new BMS-IC TLE9012AQU.