Systems and methods for monitoring high charge levels in rechargeable batteries

An electronic device, comprising:

• one or more processors;
• and
• memory having instructions stored thereon, which when executed by the one or more processors cause the processors to:
• allocate an indexed sequence of bits in a buffer for tracking a battery charging state, the indexed sequence of bits having a first number of bits;
• sample a battery voltage of a rechargeable battery at a sampling rate;
• for each sampled battery voltage:
• compare the battery voltage with a voltage threshold;
• identify a next bit position in the indexed sequence of bits;
• and
• in accordance with a determination that a comparison result is true, add a predefined first value to the next bit position in the indexed sequence of bits;
• determine, in the indexed sequence of bits, a second number of bits that are filled with the predefined first value;
• determine a ratio between the second number and the first number;
• and
• in accordance with a determination that the ratio exceeds a threshold step-down ratio, step down a battery charge voltage to which the rechargeable battery is charged to a step-down voltage.

A non-transitory computer-readable medium, having instructions stored thereon, which when executed by one or more processors cause the processors to:

• allocate an indexed sequence of bits in a buffer for tracking a battery charging state, the indexed sequence of bits having a first number of bits;
• sample a battery voltage of a rechargeable battery at a sampling rate;
• for each sampled battery voltage:
• compare the battery voltage with a voltage threshold;
• identify a next bit position in the indexed sequence of bits;
• and
• in accordance with a determination that a comparison result is true, add a predefined first value to the next bit position in the indexed sequence of bits;
• determine, in the indexed sequence of bits, a second number of bits that are filled with the predefined first value;
• determine a ratio between the second number and the first number;
• and
• in accordance with a determination that the ratio exceeds a threshold step-down ratio, step down a battery charge voltage to which the rechargeable battery is charged to a step-down voltage.