Patent attributes
Discharging a rechargeable battery in a wellbore may extend a lifetime of the rechargeable battery. A battery device positioned downhole in a wellbore may include a rechargeable battery for converting stored chemical energy into electrical power for powering a wellbore tool downhole. The battery device may also include a power source coupled to the rechargeable battery to charge the rechargeable battery. The battery device may include a controller that can discharge the rechargeable battery following a wellbore operation performed by the wellbore tool. The controller can monitor voltage levels of the rechargeable battery. The controller can further charge the battery cell prior to use of the wellbore tool if the voltage levels of the battery cell are below a discharged threshold.
