Accumulator Managment System (High Voltage Battery Managment System)
The AMS system consists of two main parts, the master and multiple slaves.
The AMS Slave is a subsidiary system responsible for measuring all the cell voltages and strategically placed temperatures on one stack.
The AMS Slave is powered by LTC6811, a powerful, new gen IC capable of measuring of up to 12 cell simultaneously and up to 5 auxilary readings. One slave features 2 of such IC for a total of 20 cell and 10 temperature measurements. All Slaves are connected in chain configuration allowing for a quick data dump from all slaves in series. For interfacing the LTC6811 uses isoSPI, a special SPI/Ethernet like protocol, which features amazing noise immunity due to usage of a twisted differential pair. All of that on a custom 4 layer board. The AMS slave boasts a lot smaller (106mm x 50mm) size compared to it's predecessor allowing for a lot more versatile usage and making one cell stack far more compact.
The research and development work was carried out was a part of the Student Scientific Clubs Create Innovations (SKNTI) program. Ministry of Science and Higher Education
