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Editor's Pick - Materials Handling


Smart performance

13 April 2024

Clark showcased the new S-Series Electric at LogiMAT in Stuttgart. The SE25-35 electric four-wheel forklift trucks with load capacities of 2.5 to 3.5 tonnes are designed for high handling performance with low operating costs.

THE SERIES is built for intensive indoor and outdoor use and has integrated reversing camera and active safety systems. A particular highlight are the new lifting masts, which offer excellent mast visibility thanks to the double primary cylinders. Features include an intuitive direction change integrated into the hydraulic levers or mini levers and the electric parking brake, which prevents the vehicle from unintentionally accelerating or rolling backwards. 

Operators have the option of changing the vehicle's energy source and adapting the software accordingly without any major additional effort if the application requirements change. The operator can operate the forklift truck with the classic lead-acid battery or, if required, switch to the high-performance Clark lithium-ion technology, which is particularly effective in multi-shift applications. 

Lithium solution

The Clark Li-ion solution offers the customer everything from a single source – the Li-ion battery, the battery management system (BMS) and the high-frequency charger. The maximum battery capacity for all models in the SE25-35 series is 560 Ah. The 80 V, 120 Ah charger only requires a high-voltage connection (CEE 16 A plug) and fully recharges a 560 Ah battery in just over 3.5 hours. The charging status is shown on the vehicle display. During the charging process, the display on the charger shows the current charging status of the Li-ion battery. The BMS has a safety cut-out. Possible error codes of the BMS are also shown on the vehicle display.

The Clark Li-ion battery can be temporarily charged at any time and within a very short time, for example when breaks occur, without damaging the battery or shortening its service life. Approx. 6.25% of the charge level can be reached in 15 minutes. Li-ion vehicles can therefore be used around the clock without the need to change the battery. This reduces the downtimes that would be necessary for a battery change. Another advantage of Li-ion technology is that the battery has a constant voltage throughout operation. Full power is always available ⎼ even if the battery is already 80% discharged. Operators can therefore not only increase their productivity with Li-ion technology, but also save costs for maintenance, infrastructure, and replacement batteries.

Clark Li-ion batteries also guarantee a high level of safety, as they are based on lithium iron phosphate technology (LiFePO4). With LiFePO4 batteries, no oxygen is released during the chemical reaction within the cells. This means that there is no risk of spontaneous combustion or explosion of the battery. Vehicles with LiFePO4 batteries perform efficiently even at very low and high ambient temperatures. With 2500 guaranteed charging cycles, the service life of the Li-ion battery is at least twice as long, and depending on the application, many times longer than the service life of a lead-acid battery. LiFePO4 batteries are also more environmentally friendly than lithium-nickel-manganese-cobalt-oxide (NMC) batteries, for example, which require problematic raw materials such as cobalt.

Clark also pays attention to sustainability and safety at the end of the Li-ion battery's life cycle. To recycle the battery, the industrial truck specialist works with experienced disposal companies that specialize in recycling lithium-ion batteries and reusing lithium.

The models in the SE25-35 series are equipped with two low-noise AC traction motors, each with 9.0kW and 80-volt three-phase AC technology, which enable rapid acceleration and high thrust. The wear-free, powerful AC motors reach a top speed of up to 19 and 20 km/h respectively. Three individually programmable driving modes are available for energy-efficient utilisation of the truck. Wear-free regenerative braking with the engine brake and automatic speed reduction when cornering can also be set as required. 

The S-Series Electric is also designed according to the Built to Last concept. This requires a solid construction with high-quality and durable components, including wet, maintenance-free multi-disc brakes and lift masts with 6-roller fork carriage. 

Power steering

The power steering ensures that only low steering forces and few steering wheel turns are required when manoeuvring. With a steering angle of 101° (Zero Steer Turn Axle), the vehicle turns almost on the spot and is suited for use in narrow aisles. The SE30s  combines the compact frame of the 2.5 tonne model with a higher load capacity of three tonnes and the twin-engine front-wheel drive. This makes the SE30s capable of handling heavy loads in extremely space-critical work areas.

For extra safety

For operators who prioritise maximum safety, additional safety features are available as an option. These include, for example, the load weight indicator, which measures the weight of the load on the forks and helps to prevent the truck from being overloaded. With the Vertical Mast System (VMS), which is also optional, a tilt sensor automatically brings the mast into a vertical position so that goods can be loaded and unloaded quickly and safely. The VMS positions the mast vertically both when tilting forwards and backwards and equalises the vehicle position on uneven floors or ramps.

For more information, visit www.clarkmheu.com