SLUAAP1 may   2023 BQ25120A , BQ25121A , BQ25122 , BQ25123 , BQ25125 , BQ25150 , BQ25155 , BQ25157 , BQ25180

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1What is 0-V Charge Inhibition?
  5. 2Implement Charge Inhibition With a Charger
    1. 2.1 Measuring Battery Voltage using Battery Undervoltage Lockout
    2. 2.2 Executing a Battery Short Test
    3. 2.3 Example Implementation
  6. 3Summary
  7. 4References

Abstract

Lithium technology batteries provide an energy dense solution for portable power. The advantages lithium batteries provide come with added risk to final applications. To mitigate this risk, battery protection measures must be taken to reduce the possibility of battery failure. One such protection measure, 0 Volt Charging Inhibition, is implemented in many battery protection circuits. The protection is used to prevent the continual charging of an internally shorted battery.

Using a few techniques and features widely available on chargers, voltage based charging inhibition features can be approximated with only a host processor available. Using battery undervoltage detection as a basic battery voltage monitor, and some additional software logic, 2-V Charge Inhibition can be implemented in charging systems to add another layer of protection to the battery charging process.