Self-contained charging system for electric vehicle battery

An electric vehicle (EV) comprising:

• a power system, the power system including:
• a trickle charger device configured to supply a trickle charge to one or more components of the power system,
• wherein the trickle charger device is a self-contained source of electric current that is not rechargeable;
• and
• a power management controller configured to manage electric current supplied from the trickle charger device to the power system of the EV.

A method for trickle charging a battery of a vehicle, the method comprising:

• detecting an event at the vehicle that reduces or potentially reduces a driving range of the vehicle or depletes a charge of a primary battery, the primary battery being configured to power a motor of the vehicle;
• and
• in response to detecting the event, causing a trickle charger to trickle charge the primary battery or a secondary battery configured to power a component of the vehicle other than the motor,
• wherein the trickle charger is a self-contained source of electric current that is generated autonomously and is not rechargeable.

A standalone device comprising:

• a battery configured to supply power to the standalone device;
• a trickle charger device configured to supply a trickle charge to one or more components of the standalone device,
• wherein the trickle charger is not rechargeable;
• and
• a controller configured to manage power supplied from the trickle charger to the battery.