Battery monitoring circuit with storage of charge and discharge accumulation values accessible therefrom

A system for monitoring select parameters of a battery having positive and negative terminals, comprising:

• a charge determination circuit for determining information relative to the current level input to the battery as a function of time;
• a charge accumulation register for storing an accumulated charge value representing the level of current input to the battery over the time that the current level was present, as determined by said charge determination circuit;
• a discharge determination circuit for determining information relative to the current level output from the battery as a function of time;
• a discharge accumulation register for storing an accumulated discharge value representing the level of current output from the battery over the time that the current level was present, as determined by said discharge determination circuit;
• a CPU for determining the parameters of the battery utilizing information in said charge determination circuit, said charge accumulation register, said discharge determination circuit and said discharge accumulation register;
• and
• an input/output interface for interfacing said CPU to the contents of said charge accumulation register and discharge accumulation register and the information stored therein.

A method for monitoring select parameters of a battery having positive and negative terminals, comprising:

• determining information relative to the current input to the battery as a function of time with a charge determination circuit;
• storing an accumulated charge value representing the amount of current input to the battery over time in a charge accumulation register, as determined by the charge determination circuit;
• determining information relative to the current output from the battery as a function of time with a discharge determination circuit;
• storing an accumulated discharge value representing the amount of current output from the battery as a function of time in a discharge accumulation register, as determined by the discharge determination circuit;
• and
• providing an interface with an external system to allow access thereby to the charge accumulation register and discharge accumulation register and the information stored therein.