Safe operation of electric counterbalance forklifts

Electric counterbalanced forklift trucks need to do more than just move efficiently, they have to hold loads securely, position them precisely and stop reliably in critical situations. Modern spring-applied brakes play a central role in ensuring safety, availability and energy efficiency.
 

Electrification in the forklift industry 

Electrification has long been established in the forklift industry and has fundamentally shaped its development. Today, innovation is driven by automated solutions such as automated guided vehicles (AGV), as well as the growing use of electrically powered counterbalanced forklift trucks. These vehicles operate emission-free, are significantly quieter, offer precise controllability and require less maintenance compared to internal combustion engine alternatives. 

At the same time, operational demands are increasing. Multi-shift operations, tightly synchronized material flows and high safety standards are now the norm in modern intralogistics. Counterbalanced forklift trucks in particular handle heavy loads, often operate on ramps or uneven surfaces and must remain controllable at all times, even in the event of a power failure. 

As a result, safety-critical components are becoming more important than ever, especially the holding and safety brake. 

Why holding brakes are essential in electric forklifts 

In electric counterbalance trucks, holding brakes do far more than simply act as a parking brake. They prevent unintended movement and ensure stability in situations where the electric drive system alone is not sufficient. 

Typical safety-critical scenarios include: 

With electric counterbalanced forklift trucks, the risks are significant: high vehicle mass and dynamic driving profiles generate substantial kinetic energy that must be safely managed in emergency situations. 

Spring-applied brakes: fail-safe technology for modern forklift concepts 

Spring-applied brakes have become the preferred solution for holding and safety functions in  electric industrial trucks. Their key advantage lies in their operating principle: 

Spring-applied brakes follow a fail-safe principle. In the event of a power failure, the brake automatically engages through spring force, securing the application. When power is applied, the magnetic force pulls the armature plate against the spring force, releasing the brake and allowing movement. 

Why is this so relevant in practice: 

In electric intralogistics systems, many functions depend on sensors, control systems and battery management. A fail-safe brake provides an essential safety backup because it operates independently of software or system status. 

In addition, spring-applied brakes offer several advantages: 

This makes them ideal for forklifts that are in constant use in day-to-day operation. 

1. Limited installation space in the electric drives 

Batteries, power electronics and compact motors already take up a large portion of available space.  In addition, integrating the spring-applied brake on the motor shaft increases the overall drive length. Manufacturers therefore need compact solutions that still deliver high braking torque. 

2. Higher requirements for protection and robustness 

Industrial trucks operate in demanding environments. Dust, moisture, cleaning processes and temperature fluctuations are part of everyday use. Brakes must be mechanically robust and offer appropriate protection ratings (e.g. IP66 against dust and water) 

3. Energy efficiency in holding mode 

To maximize efficiency, holding brakes must not consume unnecessary battery power. Features such as overexcitation (for fast release) and reduced holding current (lower power consumption in released state) are becoming increasingly important. 

Practical example: Safe holding on ramps under full load 

A typical scenario in logistics centers is ramp operation between warehouse floors and loading docks. An electric counterbalance forklift transports heavy pallets with high dynamics. 

In this environment, the holding brake is constantly required: 

For such applications, high-performance spring-applied brakes are used, such as the BFK457-14. It provides a braking torque of 90 Nm, is designed as a flexible platform for various vehicle concepts and supports a high number of guaranteed emergency stops. Service-friendly features such as a replaceable rotor or optional manual release help ensure long-term operational availability. 

For particularly compact drive concepts, a solution like the BFK552-12 is a strong fit. Despite its very low installation height, it delivers high performance and operates reliably even in harsh environments thanks to its IP66 protection.