Mines with poor transportation conditions are reliable locations for testing vehicles. Mine trucks are often heavy-duty transportation, and most of the mine's internal roads are non-paved roads, and the slopes are at the level of 10%-30%. Although the haul distance is relatively short, long-term overload operation under such harsh conditions will inevitably bring a certain test to the reliability of the vehicle's power.

　　The battery pack is located on the left and right sides of the frame, where the fuel tank was originally installed.

　　Before introducing the power system, let's take a brief look at the configuration and actual use of the car. The modified Tongli TLD90 mining truck is named ET90. The vehicle has a curb weight of 30 tons, a rated load of 60 tons, and a total mass of 90 tons. The truck actually transports 60-65 tons of ore, and the curb weight can reach about 95 tons.

　　The chassis structure still retains the style of the traditional mining truck. The front axle uses a reinforced large-tonnage steering axle, and the rear axle is a large-tonnage wheel-side reduction axle with MAN technology. All products are from Hande in Shaanxi. The layout of the drive system is similar to that of a traditional diesel engine, all located under the front power compartment.

　　As far as pure electric mining vehicles are concerned, many people are more concerned about their climbing problems. Some domestic electric vehicle manufacturers produce dump trucks with fewer gears, and they cannot directly control the gears, and there will be an embarrassing situation of insufficient power for heavy-load climbing, or even slipping after parking.

　　It is still difficult to observe the power system of the vehicle on the mine truck, so the author came to the headquarters of Tepoca Power and saw the structure of this power system in the exhibition hall. The entire power system is composed of four parts, namely the motor, gearbox, cooling system and the control system of the motor gearbox.