https://en.wikipedia.org/wiki/Hall-effect_sensor

Advantages of Hall-effect current sensor over resistive shunt-based sensor:

• It's not electrically connected to the high-voltage circuit.
• No much heat to dissipate from the sensor

Disadvantage: DC bias

https://en.wikipedia.org/wiki/DC_bias

Bias can be estimated in plug-in electric vehicles by comparing total coulomb-counted inserted and removed charge between the po]ints of known State-of-charge (e. g., 100%), assuming the total capacity has not changed much in between and that Coulombic efficiency is approximate equal to 1.

References

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