System and method of operating an electrical energy storage device or an electrochemical energy generation device, during charge or discharge using microchannels and high thermal conductivity materials

A method of operating an electrical energy storage device or an electrochemical energy generation device, comprising:

• charging the electrical energy storage device or the electrochemical energy generation device;
• placing an electrical load to draw current from the electrical energy storage device or the electrochemical energy generation device, the electrical energy storage device or the electrochemical energy generation device including a housing having an external surface and an internal surface;
• generating electricity by a component within the housing, the component being configured to generate electrical energy in combination with other components, chemicals, or materials residing within the housing;
• altering the temperature of the electrical energy storage device or the electrochemical energy generation device by transferring heat to a plurality of microchannels coupled to at least one of the internal surface of the housing or the component, wherein at least one microchannel of the plurality of microchannels is at least partially formed of or coated with a high thermal conductivity material;
• and
• transferring the collected heat through a thermal sink coupled to the plurality of microchannels, the thermal sink being located outside of the housing and the thermal sink being configured to transfer heat energy to or from the plurality of microchannels and receive a fluid flowing through the microchannels;
• wherein the plurality of microchannels are formed in a portion of the component, wherein the component is a cathode.