Emergency or standby batteries

Wednesday, November 6, 2024

Helicopter emergency battery

Helicopter emergency battery

Standby battery

Standby battery

Standby battery or emergency battery

A standby battery, often referred to as a back-up or emergency battery, is a secondary power source used to maintain power to critical systems in the event of a main power failure. It ensures the continued operation of electrical and electronic devices when the main power supply is interrupted. Standby batteries are commonly used in computer systems, security devices, telecommunications and other applications requiring uninterrupted power.

A standby battery with an integrated charger, often referred to as an UPS (Uninterruptible Power Supply), is a device that provides a temporary power supply in the event of a power failure. It has a built-in charger to keep the battery fully charged and ready for use when needed. This type of device is crucial for protecting sensitive electronic equipment against power interruptions and voltage fluctuations.

Main components of a back-up battery

Rechargeable battery

The emergency power source, often made up of lead-acid, lithium-ion or nickel-cadmium batteries, stores electrical energy. The rechargeable battery is the main component that stores electrical energy. Commonly used battery types include:

Lead-acid

Lead-acid batteries are used for their relatively low cost and reliability.

Lithium-ion

Lithium-ion batteries are used for their high energy density, light weight and long life.

Nickel-cadmium

Nickel-cadmium batteries are used for their robustness and ability to operate in extreme conditions.

Integrated charger

The integrated charger is a device that keeps the battery fully charged by converting the mains supply into a voltage suitable for the battery.

Voltage regulator

The voltage regulator ensures a stable voltage output, protecting equipment against voltage surges and dips.

Transfer switch

The transfer switch is a device that automatically switches the power supply of connected devices from the main source to the standby battery in the event of a power failure. It automatically switches from the main power supply to the standby battery in the event of a power failure and vice versa when the power supply is restored.

Control interface

The control interface displays information on the state of the battery and the mains supply, and enables various UPS parameters to be configured. It can include LED indicators, LCD screens or software interfaces to monitor battery status, load, and other essential parameters.

How a back-up battery works

Normal power supply

When mains power is available, the built-in charger keeps the backup battery charged. Connected devices receive mains power directly. In normal mode, the battery is constantly kept charged by the built-in charger, ready to supply power when needed.

Power failure detection

When the main power supply is interrupted, the transfer switch detects the failure and automatically switches to battery standby. The inverter converts the stored energy into alternating current to power the appliances.

Emergency power supply

The standby or emergency battery supplies power to the connected devices, keeping them running without interruption.

Restoring power

Once the main power supply is restored, the transfer switch switches back to this source, and the standby battery begins to recharge in preparation for a future failure. When the mains power is restored, the transfer switch switches back to the main power source. The charger resumes charging the battery to prepare it for future use.

Back-up battery applications

A back-up battery is an essential device for ensuring a continuous and stable power supply, protecting critical systems against power interruptions and voltage fluctuations. The back-up battery plays a vital role in many sectors, ensuring reliable and safe operations.

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