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3.6 Battery protection

Version 3.1 by Admin on 2024/11/21 18:03

The BMS Main 2.x board continuously monitors the state of the cells, BMS Logic boards, the external environment and, when detecting abnormalities, protects the battery and system components from damage.

3.6.1 Overcurrent protection

To change the current protection of the battery, select the menu "Protections → Overcurrent protection":

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Overcurrent protection settings

In this section:

  • Enable – a flag to enable the protection;
  • Maximum charging current, А;
  • Tolerant charging current, А;
  • Maximum discharging current, А;
  • Tolerant discharging current, А;
  • Delay before setting the error, second;
  • Delay before clearing the error, second;
  • Lock the error until the device is reset – a flag to block the error until the board is restarted.

As a result of operation of the current protection, the "Overcurrent" error is generated.

Error generation conditions:

  • the current is positive (charging), and its modulo value is greater than the “Maximum charging current” value for the “Delay before setting the error” time;
  • the current is negative (discharging), and its modulo value is greater than the “Maximum discharging current” value for the “Delay before setting the error” time.

Conditions for removing the error:

  • the current is positive (charging) or zero, and its modulo value is less than the “Tolerant charging current” value for the “Delay before clearing the error” time;
  • the current is negative (discharging), and its modulo value is less than the “Tolerant discharging current” value for the “Delay before clearing the error” time.

If there is the "Overcurrent" error, the charging relay and discharging relay open.