Battery control method and apparatus, battery module, and battery pack

A battery module comprising:

• a battery cell;
• a converter connected to the battery cell;
• and
• a controller configured to receive an output value defined based on state difference information of the battery module from an external controller, and control the converter to supply power corresponding to the output value to a load,
• wherein the state difference information is calculated based on a statistical measure of state information of the battery module and another battery module.

A battery pack comprising:

• battery modules;
• converters respectively corresponding to the battery modules;
• and
• a main controller configured to calculate state difference information for each of the battery modules based on a statistical measure of state information of all of the battery modules and the state information of each of the battery modules, define each of output values of the converters based on the state difference information and generate control signals to control the converters to supply power corresponding to the output values to a load.

A battery control method, comprising:

• calculating state difference information for each of batteries based on a statistical measure of state information of all of the batteries and the state information of each of the batteries;
• defining output values of converters respectively corresponding to the batteries based on the state difference information, each of the converters being electrically connected to a corresponding one of the batteries;
• and
• performing an equalization for the batteries by controlling the converters based on the output values,
• wherein the battery control method is performed by one or more processors.

A device comprising:

• a battery pack comprising battery modules, and converters respectively electrically connected to the battery modules;
• a low-voltage load electrically connected to the battery pack through the converters;
• a high-voltage load electrically connected to the battery pack bypassing the converters;
• and
• a main controller configured to
• calculate state difference information of each of the battery modules based on state information of each of the battery modules,
• define each of output values of the converters based on the state difference information, and
• generate control signals to control the converters to supply power corresponding to the output values to the low-voltage load.

A battery control apparatus comprising:

• converters, each of the converters being connected to a respective one of batteries and configured to supply power from the respective battery to a load;
• a processor configured to calculate state of charge difference information for each of the batteries based on a statistical measure state of charge of all of the batteries and the state of charge of each of the batteries, and define respective output powers of the converters that will equalize respective states of charge of the batteries, each of the output powers being defined based on the state of charge difference information for each of the batteries;
• and
• a signal generator configured to generate respective control signals for the converters to control the converters to supply the respective output powers to the load.