Method and apparatus for charging a battery based on a wear factor calculated from usage statistics and usage parameters of the battery

A battery charging system, comprising:

• a battery;
• a memory that stores usage statistics of the battery;
• and
• a controller configured to:
• receive the usage statistics of the battery;
• receive usage parameters of the battery that define a measurable aspect of the battery and that characterize value ranges of the measurable aspect into different usage bins, the usage bins including voltage bins and temperature bins;
• calculate a wear factor based on the usage statistics and the usage parameters, including:
• assigning voltage and temperature values of the received usage statistics to the voltage bins and temperature bins, respectively, defined by the received usage parameters;
• determining an amount of time the battery has spent in each usage bin;
• and
• calculate the wear factor based on the amount of time the battery has spent in each usage bin;
• and
• control a charging rate of the battery based on the calculated wear factor.

A method for calculating a battery charging limit, comprising:

• receiving battery state parameters from a memory, the battery state parameters defining a plurality of voltage bins and a plurality of temperature bins;
• receiving battery usage statistics from the memory, the battery usage statistics including an amount of time a battery has spent in each of the plurality of voltage bins and each of the plurality of temperature bins;
• calculating an accumulated battery degradation based on the received battery usage statistics and the received battery state parameters;
• calculating the battery charging limit based on the accumulated battery degradation;
• and
• charging the battery based on the accumulated battery degradation.