The 930E mining truck operates at the Haerwusu Coal Mine. [Photo/Nuan news]

The first hybrid 930E heavy-duty mining truck modified from fuel-powered to hybrid by Zhuneng Group was recently completed and put into production at the Haerwusu Coal Mine in Ordos. It is the first of its kind in China.

Test results show that the fuel consumption of this electric wheel mining dump truck was far lower than that of other trucks of the same model after one-day loading, transportation operations and shuttling back and forth on winding roads.

What makes the truck so fuel-efficient? It's the battery cabinets on the front and the side-mounted DC/DC converters. Thanks to the DC/DC converter, the braking energy generated when the truck descends can be recovered in the batteries, and then the energy stored in the batteries can be discharged when the truck climbs, providing traction power for uphill movement. This significantly reduces the truck's diesel consumption, resulting in reduced energy use, reductions in emissions and costs, and an increase in efficiency.

Mainstream models of large mining dump trucks still rely on diesel as their power source. According to statistics, a 930E electric wheel mining dump truck consumes approximately 1,200 metric tons of fuel per year.

But now, truck drivers just need to lightly apply the brakes, and a continuous stream of electrical energy is stored in the batteries, providing ample kinetic energy for subsequent operations, effectively reducing diesel consumption and thus carbon emissions. After operating for one year, the truck has recovered a total of 40,046.72 kilowatt-hours of electricity, saving 13,100 liters of fuel – a fuel saving rate of 8.8 percent.