A long time and safety operation with low voltage (48V) power on board

The Slopehelper has a fully electrical low voltage (48V) agro-system, including a power drive train that can provide extremely high torque with zero RPM, based on 48UGV patented technology.

When activating the vehicle, we can have the same torque with 48 volts as others with 450 and higher volts.

Rechargeable with ordinary electric socket (220V) or optional fast charger on (380V):

  • Basic batteries set is 480 Ah x 48V, which means for fully charged batteries will consume about 24 kWh. With this power the vehicle has the ability to operate at full load (40° inclinations and constant tractive force 2t with load), for about 6 hours.
  • Full batteries set is 720 Ah x 48V, which means for fully charged batteries will consume about 36 kWh. With this power the vehicle has the ability to operate at full load (40° inclinations and constant tractive force 2t with load), about 8 hours. Normal operation, with one connected hinge equipment element exceeding more than 14 hours.

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The 48V technology provides possibilities for precise control of both torque and position of each caterpillar and even undo maximum load, because of using Permanent Magnet Synchronous Motor and IntEn controller with special algorithms. Before the EV48 was presented the market never had any caterpillar transporter with separate control of caterpillars. Our company has designed the innovative bridge control with System-On-Chip based and we realized absolutely different PMSM control for low RPMs, which provides a possibility to get extremely high torque of PMSM/BLDC engine with ZERO RPM.

 

 

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In the Slopehelper autonomous system, we are using Lithium Ferro-phosphate battery block, which it shares many advantages over other chemicals in lithium-ion batteries. Phosphate chemistry offers a longer cycle life with time durability more than 12 years and charging cycle durability between 2.000-12.000 cycles.

One important advantage over other lithium-ion chemistries is thermal and chemical stability, which improves battery safety. LFP batteries were designed to overcome the safety problems associated with the highly reactive properties of Lithium metal. The essential feature of the Lithium FP battery is that at no stage in the charge-discharge cycle should there be any Lithium metal present. Rather, Lithium ions are intercalated into the positive electrode in the discharged state and into the negative electrode in the charged state and move from one to the other across the electrolyte.

Secondly, lithium ferro-phosphate is a newer technology than lithium-ion batteries. Phosphate-based technology has far better thermal and chemical stability. This means that even if you handle a lithium-FP battery incorrectly, it is far less likely to be combustible, compared to a lithium-ion battery.

LFP cells have no memory effect and have a long cycle life and excellent discharge performance. For safety reasons, the charge control circuitry is required for virtually all Lithium-FP applications. If a fire occurs with an LFP battery, it can be extinguished by an ordinary water sprinkler system.

More and more EV manufacturers are starting to use LFP batteries as well, such as the example with our agro-system, Slopehelper. Fully-charged LFP batteries can be put in storage with little change to the total lifespan of the battery’s charge.

  • Discharge/Charge Test

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Additional skills and training are required to enable people to work safely with E&HVs and the operation of high voltage electrical systems. For example, awareness of additional risks is likely to be all that is needed for people who produce or sell vehicles but the same and for the costumers. However, people involved in vehicle repair and maintenance are likely to need a much higher level of competence to be able to work safely on these types of vehicles, specific training, and qualifications.

When it comes to the safety of the whole power supply, in our case it becomes a low voltage electrical system. But low voltage is also 72V which in contact with moist conditions can be extremely unsafe and fatal on contact. According to the German Institute for Electrical Vehicle Safety Inspection that the upper limit of safety is 56V, all of which is dangerous for users.

Our powerful 48V technology, is characterized by high power and safety level. In general, the entire electrical installation is a closed system and through the deck the tree deployed in the body of the Slopehelper vehicle, but even if it came in contact with the operator or the FAE in the installation, it would in no way be life-threatening. This whole process has been approved and certified by relevant institutes and product safety inspections.