Electrical Design

Li-ion or Li-Po cells cannot be used directly in electronic device. They have to be and assembled with a PCM (protection circuit module) and other components of different devices. Sometimes the more complex designs such as smart battery pack may use integrated PCM and BMS (battery management system) which provides the advanced functions such as fuel gauge calculations, protection, cell balancing, thermal sensing, statues indicating lights and serial communications buses.

PCM works as safety devices and it protects the cells against over charging/ discharging, over current, short circuit, over heat and etc. Li-ion/li-po batteries must be used within the operation ranges of 2.75V min. to 4.2V max. Otherwise they should be damaged permanently and can’t be used again. It has following functions:

1) Overcharge voltage protection.
2) Over discharge voltage protection.
3) Over-current protection.
4) Short circuit protection.
5) Battery high temperature protection.
6) Battery's internal pressure increase protection.

BMS is a protection, control and management system to monitor the battery status in order to protect the cells from damage, generate alarms, keep the application work normally and prolong the battery’s service life. It has the major function as follows.

1) All PCM protection functions
2) Measurement of voltage, current, capacity, temperature
3) Charging control
4) Cell monitoring and balancing
5) Communication interface with application

At Creup no matter what your application requirements, from basic PCM design to advanced smart battery management system, by using standard components we are able to deliver.