Auxiliary Battery

Overview

Hybrid electric vehicles (HEVs) and electric vehicles (EVs) make use of auxiliary batteries. These are to charge multiple accessories. 

Rather than making use of a high voltage[ HV] battery to power such accessories, the auxiliary battery permits systems that need a constant supply of voltage to remain powered. 

How does an auxiliary battery work?

The auxiliary battery is basically an added power source. It complements the principal battery in the vehicle or the device. 

The auxiliary battery ensures unlimited power. This makes sure that the vehicle has performance and functionality without interruption. 

The auxiliary battery is the prime importance especially when the main battery does not meet the power demands or is drained off. 

Generally, the auxiliary battery is found in the vehicle having additional electrical equipment. These need power when the engine is off. 

Such a  battery works for audio systems, mobile communication devices, lightning systems, refrigeration units, auxiliary power outlets, Gand PS and navigation systems in a vehicle. 

The AGM batteries are different from traditional flooded batteries making them extra resistant to shocks, leakage and vibration. 

On the basis of the power needs, you need to select the battery that matches the necessary chemistry and capacity.

Features of Auxiliary Battery in EVs

Some of the features of the auxiliary battery are mentioned as under: 

• Battery case: The battery case acts as an enclosure for the auxiliary battery. 
• Battery cells: The battery cells in the auxiliary battery are responsible for chemical reactions to generate electrical energy. 
• Terminals and connectors: With the terminals and connectors you are able to connect the auxiliary battery with the electrical system of EV. 
• Control circuitry

Application of auxiliary battery in EV

• Powering non-propulsion systems: EVs depend on the auxiliary batteries for  powering the non-propulsion systems. 
• Operations–Auxiliary battery performs an important role for the operation and the user experience of EV. 
• Lighting Systems: Headlights, taillights, interior cabin lights, dashboard lighting– all extract power from the auxiliary battery.
• Infotainment Systems: The screens, audio systems, and navigation tools rely on the low-voltage battery for hassle-free operation.
• Safety systems
• Central control systems

Conclusion

While the main focus of EV development generally revolves around the propulsion battery, auxiliary batteries play a crucial role in powering non-propulsion systems. 

From supporting safety features as well as infotainment systems to vehicle operation as well as redundancy, the auxiliary battery has a fine role in electric vehicle design. 

As EV technology moves in advancement, auxiliary batteries will evolve to a greater degree. These will become more efficient, integrated, as well as important to the electric mobility experience.