GXSC 120V@18S automotive-grade BMS AFE helps power battery BMS for new energy vehicles

For BMS (Battery Management System), AFE is the most important chip selection. Whether it is a new energy passenger car or energy storage, the key technology of BMS technology is the acquisition and protection of battery cell parameters, i.e. AFE technology. Therefore, the AFE program directly determines the entire BMS system program.

BMS AFE is a kind of monitoring chip with multiple sampling channels, which carries out real-time monitoring of voltage and temperature of multi-stage series-connected battery cells, and supports battery equalization function. It integrates functional modules such as high-precision ADC, high-voltage multiplexing, high-precision voltage reference, equalization and protection circuits, and SPI interface.

This article mainly introduces the 120V@18S automotive grade BMS AFE, which is widely used in new energy vehicle power battery BMS, energy storage/grid-side large storage, industrial and commercial storage, and medium and high-end household storage BMS market, and has automotive grade, AEC-Q100 Grade 1 certification.

Advantages of GXSC BMS AFE series products:

1, the industry‘s highest withstand voltage value of 120V: support 6-18 series battery packs, the highest withstand voltage of 120V

2, full parallel & true synchronization: 18-way ADC true synchronous sampling architecture, complete 800V/220 series all cell sampling time is less than 2mS.

3, ultra-low total sampling error: to protect the full error conditions (temperature, humidity, welding and long-term drift), the voltage sampling accuracy up to:

±1.5mV(1.5~5V)@25°C

±2.0mV(1.5~5V)@-20°C~65°C

±3.0mV(1.5~5V)@-40°C~125°C

4, built-in ultra-low temperature drift and high stability Zener architecture reference, temperature drift as low as 3ppm / ℃.

5, up to 11 external temperature measurement channels, 0.1% ADC accuracy to support ± 1 ° C @ -20 ° C ~ 65 ° C under the temperature measurement

6, passive equalization: typical 1.2Ω ultra-low equalization on impedance can support up to 300mA of internal equalization current

7, isolated communication: 1Mbps bidirectional daisy chain can support up to 40 or more AFE cascade, support for capacitive or transformer isolation; high robustness design to ensure that the daisy chain communication through the most stringent BCI communication level and accuracy tests