FW version: Stable

BEST - Battery SOC estimator

Description

This module estimate battery State Of Charge.

There are two algorithms:

These algorithm working together to compute the SOC.

By increasing soc_gain or reset_gain, BEST module will rellay more on voltage estimation.

There is no setting for columb counting. You can just disable it (Set P to 0).

When disabling coulomb counting?

If the siliXcon controller is not the only power device connected to the battery.

For controllers located at folder /best.
For BMS located at folder /driver/best.

Name	Description
`S`	[-] number of cells in series
`P`	[-] number of cells in parallel. Set 0 to disable columb counting.
`soc_gain`	[1/Ohm/3.6] weight of SOC correction from voltage. Set 0 to disable voltage correction during run. (Voltage correction will work only during BEST reset).
`reset_time`	[ms] SOC reset time at device startup. Set negative for only manual reset from command `breset` or from the app. Set 0 to disable the reset feature.
`reset_gain`	[1/Ohm/3.6] Same as `soc_gain`, but this gain is used during BEST reset.
`Cc`	[mAh] cell nominal capacity
`Rc`	[Ohm] cell nominal resistance
`Rs`	[Ohm] pack series wiring resistance
`U100`	[V] OCV* for cell when SOC = 100%
`U85`	[V] OCV* for cell when SOC = 85%
`U10`	[V] OCV* for cell when SOC = 10%
`U0`	[V] OCV* for cell when SOC = 0%

*Open Circuit Voltage - voltage on a single battery cell, without load.

Name	Description
`soc`	[0-1] Battery state of charge

Located at folder /permanents.

Name	Description
`Cmax`	[mAh] Maximum battery capacity (at 100% charge)
`Cact`	[mAh] Actual battery capacity

Name	Description
`breset`	Reset BEST module. For `reset_time` is SOC corrected using `reset_gain`