Battery monitoring system

1 . A method of operating a battery monitoring system, comprising:

during downhole drilling operations and while a downhole tool and a battery are located downhole in a wellbore, taking health measurements with a health sensor of the battery monitoring system, the health measurements corresponding to a health condition of the battery operatively connected to the downhole tool, wherein the health measurements include a temperature experienced by the battery and wherein the health sensor is contained within a housing of the battery secured to the downhole tool;

periodically recording the health measurements with an electronic module of the battery monitoring system in response to the temperature exceeding 135° C., wherein the electronic module is contained within the housing, and wherein the health sensor and the electronic module are powered by the battery;

communicating the health measurements recorded by the electronic module such that the health condition of the battery is determined; and

operating the battery monitoring system in a sleep state with less than 1 mA of current draw.

2 . The method of claim 1 , wherein the health measurements correspond to one or more of a shock experienced by the battery or a vibration experienced by the battery.

3 . The method of claim 1 , further comprising, with the battery monitoring system:

determining the health condition of the battery based on the health measurements, wherein the health condition corresponds to a capacity for the battery to be reused in a subsequent drilling operation; and

indicating the health condition.

4 . The method of claim 1 , wherein communicating the health measurements includes communicating the health measurements wirelessly.

5 . The method of claim 1 , wherein the electronic module is a datalogger.

6 . A method of operating a battery monitoring system, comprising:

operating the battery monitoring system in a sleep state with less than 1 mA of current draw, wherein the battery monitoring system is contained within a housing of a battery configured to connect to a downhole tool to provide electrical power to the downhole tool;

while in the sleep state, monitoring, with one or more sensors of the battery monitoring system, for a trigger event associated with a downhole drilling operation of the downhole tool;

based on detecting the trigger event, waking the battery monitoring system to an active state; and

while in the active state and while the battery and the downhole tool are located downhole in a wellbore:

taking health measurements corresponding to a health condition of the battery with a health sensor powered by the battery and contained within the housing of the battery secured to the downhole tool; and

communicating one or more signals corresponding to the health measurements such that the health condition may be determined.

7 . The method of claim 6 , wherein the trigger event corresponds to one or more of a rotation, acceleration, temperature, shock, vibration, current draw, radio frequency signal, or Bluetooth signal of the battery.

8 . The method of claim 6 , wherein the battery monitoring system is powered by the battery.

9 . The method of claim 6 , further comprising, while operating in the active state, operating at no more than 5 mA of current draw.

10 . The method of claim 6 , further comprising operating in a deep sleep state, wherein the deep sleep state corresponds to one or more of a manufacturing, a shipping, or a storage of the battery, and wherein in the deep sleep state the battery monitoring system will not monitor for the trigger event.

11 . The method of claim 1 , further comprising operating the downhole tool during the downhole drilling operations with between 1 mA and 5 mA of current draw.

12 . The method of claim 1 , wherein the housing of the battery completely encloses the battery and the electronic module such that the battery and the electronic module are sealed within the housing.

13 . The method of claim 6 , wherein the health measurements include a temperature measurement, and the method further comprises periodically recording the temperature measurement in response to the temperature measurement exceeding 135° C.

14 . A system, comprising:

a processor and a memory, the memory including instructions that cause the processor to:

during downhole drilling operations and while a downhole tool and a battery are located downhole in a wellbore with the battery powering the downhole tool with between 1 mA and 5 mA of current draw, take health measurements with a health sensor of a battery monitoring system, the health measurements corresponding to a health condition of the battery operatively connected to the downhole tool, wherein the health measurements include a temperature experienced by the battery and wherein the health sensor is contained within a housing of the battery secured to the downhole tool;

periodically record the health measurements with an electronic module of the battery monitoring system in response to the temperature exceeding 135° C., wherein the electronic module is contained within the housing, and wherein the health sensor and the electronic module are powered by the battery; and

communicate the health measurements recorded by the electronic module such that the health condition of the battery can be determined.