The Adriatic Aerospace Association (A3) and the Center for Space and Innovative Technology are collaborating on the launch of the first Croatian satellite – Perun I. As part of this collaboration, a battery module was designed and built – part of the satellite’s power supply system. The battery module is based on the PC / 104 PCB format and uses four 18650 lithium-ion cells, and includes cell heaters, temperature sensors and an external load power switch.
![](https://csit.hr/wp-content/uploads/2021/08/battery_pack_top-644x611.png)