Charge controller

A charge controller, charge regulator, or battery regulator helps manage electricity going to and from batteries. It makes sure too much power isn’t added or taken away, which helps keep batteries safe and working well for longer.

This device can stop batteries from getting too full, called overcharging, or from being emptied completely, called deep discharging. Both can make a battery last a shorter time. Some charge controllers can also manage how much power is taken out of a battery, depending on the type of battery.

The words “charge controller” or “charge regulator” can mean either a separate piece of equipment or tiny parts built into a battery, a device that uses batteries, or even a battery charger itself. This makes charge controllers useful in many technologies that need stored electricity.

Stand-alone charge controllers

Charge controllers are special devices that people use with solar or wind power. They are often used in RVs, boats, and homes without regular electricity. These controllers help keep batteries safe by controlling the power going in or out.

Some charge controllers stop charging when the batteries are full. Others send extra power to things like a water heater. Simple ones turn off when the battery is too full and turn back on when it’s not. More advanced ones change how fast they charge based on how full the battery is. They can also watch the battery’s temperature to keep it safe.

Integrated charge controller circuitry

A charge controller is a small part that helps keep batteries safe and working well. It can be made of many pieces or fit inside one tiny chip called an integrated circuit (IC).

People use these controllers in many things, like cell phones, laptops, music players, backup power supplies, cars that run on electricity, and even satellites that go around Earth.

Charging protocols

Main article: USB Power Delivery

Because wires can only handle certain amounts of electricity safely, special ways to charge devices have been created. These methods let the device ask for more power without making the wires too hot. The device then changes this power to the right level for its battery.

Two common methods are Quick Charge by Qualcomm and Pump Express by MediaTek.

Pump Express Plus and Pump Express Plus 2.0 talk to the charger using special signals. Pump Express Plus can use 7, 9, and 12 volts, while Quick Charge 2.0 does not use 7 volts. A later version added a 20-volt level.

Pump Express Plus 2.0 can use voltages from 5 to 20 volts. Quick Charge 3.0 uses smaller steps and can start at a lower voltage. It goes up to 20 volts.

Oppo VOOC, also called "Dash Charge" for "OnePlus", and SuperCharge by Huawei, work differently by using more electric current. This means the device does not need to change the voltage, which keeps it cooler. But because of the higher current, these methods need special cables with thicker wires.