Industry-leading | In response to the call of equipment renewal policy, it gives equipment a second life - pure electric remanufacturing innovation technology in the grand era

Grand Times (HATL), a joint venture established by Grand Blasting and CATL, is a national high-tech enterprise and specialized new enterprise, with a professional technical team, which can fully integrate CATL's experience and advantages in battery and electrification applications and grand blasting for many years in the field of mining clothing. Innovative and successful development of multi-type intelligent pure electric products with distinctive technical characteristics, to provide users with applicable, leading electrification and intelligent solutions.

Grand Times (HATL) technical team entered the field of pure electric remanufacturing as early as 2018, is the earliest professional technical team engaged in the research of mining car oil to electricity, and is the earliest team to commercialize construction machinery products, with rich design and engineering experience.

★ Design and engineering experience

• Lead the domestic mining engineering machinery electric drive system iteration to improve product technology

• Proposed and participated in the pioneering application and development of mining engineering machinery power battery system

• "Three power" system integration design, manufacturing and verification

• Rich experience in new construction and petrol-electric remanufacturing of rigid mining trucks

• Understand the mine environment and improve product availability through design optimization

• Through intelligent design to further improve the technical level of products, and then meet the needs of intelligent mine development

With years of technical precipitation, Grand Times (HATL) has successfully launched 50 to 120 tons of serialized 1000V high-voltage platform oil-to-electric mining car products, covering various application scenarios such as metal mines and building materials mines in high cold, high temperature and humidity on the plateau.

This platform pioneering the use of high voltage direct drive technology, with advanced control strategy and system integration technology, so that the product has fast charging, good performance, high reliability, energy saving effect and other advantages, comprehensive economic benefits increased by more than 30%, to create more value for users. Grand Era (HATL) technology leads the development of the industry, and the upcoming new pure electric architecture solution for 220 tons and above is the direction of the next generation of products.

Figure | Highlights of pure electric remanufacturing cases

★ Technical features

• security:

Multi-redundancy braking safety control strategy; Intelligent monitoring and control of sensitive load temperature; LFP power battery system with stable performance; The whole vehicle mechanical structure simulation and optimization design can meet the requirements of mine safety use.

• reliability:

More than 10 years of mature and reliable unpowered chassis structure; From rail transportation industry high-power electric drive system adaptive optimization; Power box modules meet stringent safety standards and are specially designed for harsh mine conditions.

• Low energy consumption:

The optimized vehicle energy management control strategy ADAPTS the control mode according to the scene to maximize the energy utilization efficiency.

Figure | structure diagram of the vehicle

★ Core technology

01 Power battery system

The power battery system adopts LFP cell, CTP structure form, safe and reliable, high energy density.

The modular design concept is used to set a power branch into a power unit, each power unit is independent of each other, and the number of power units can be increased or reduced according to the actual working conditions on the site to adjust the vehicle electricity.

Each power unit adopts an independent mechanical structure, which facilitates the overall assembly and disassembly, improves the disassembly efficiency, and improves the maintainability of the battery system.

At present, the power battery system discharge capacity exceeds 5 million kWh, and the system runs stably and reliably.

Grand Times (HATL) is about to launch a higher voltage platform power battery system to match mining dump trucks with a load capacity of more than 220 tons, the battery system does not require high power DC/DC lift voltage, the system is more efficient, while reducing costs and improving reliability.

In addition, for the specific underground working conditions, an integrated power battery system scheme will be introduced to meet the various replenishment needs of underground pure electric equipment.

02 Electric drive system

The electric drive system adopts 1000V high voltage platform, direct motor drive mode, independent water-cooled main and auxiliary converter scheme, battery bus direct steering and lifting control module, which effectively reduces the weight and volume of the system, improves the electric braking efficiency, reduces the weight of the cable, and then improves the vehicle operation efficiency.

The input design with wide voltage fluctuation range ADAPTS to the dynamic power regulation strategy of the power battery system and optimizes the energy utilization.

Figure | self-developed core electric control, etc

03 Low voltage control system

The distributed programmable domain control technology is adopted to replace the traditional centralized low-voltage distribution architecture, optimize the distribution structure, and reduce the low-voltage wiring harness.

In addition, it can directly drive high-power components without relay transition; All output channels can be programmed to set the control logic and protection current, which can monitor the load status and current of all output channels in real time; With output overcurrent protection, short circuit protection, overtemperature protection and other functions.

Combined with the modification of vehicle performance, the vehicle control system architecture adapted to the development of HATL has the characteristics of high standardization, reliability and stability, and rich vehicle parameter control ports. It can realize the collection and remote transmission of vehicle running bus data, cooperate with the self-developed cloud intelligent fault diagnosis system, monitor and assist in analyzing the fault causes, and improve the troubleshooting efficiency. Through data accumulation and large model application, we will gradually realize the vehicle fault warning function.

Figure | screen shot of self-developed fault diagnosis system

04 Hydraulic system

Hydraulic pump variable frequency drive, high and low speed automatic switching, pressure, temperature and other parameters online and remote monitoring, new electronic control pressure and unloading;

On the basis of optimizing hydraulic braking, adding electric braking, the vehicle hydraulic system runs safer, quieter, more energy saving and more friendly.

The hydraulic system is equipped with a new emergency quick plug interface, equipped with an emergency power device to adapt to high cold and high altitude, and can also be quickly inserted tubing without borrowing vehicle power, remove materials, apply emergency steering and braking, and worry about emergency rescue.

Grand Times (HATL) will launch the product hydraulic system with electro-hydraulic ratio and load sensitive control, high pressure, large flow, long life, high efficiency and energy saving, no cooling. Using self-developed patented hydraulic drive-by-wire technology, human-driven and unmanned compatible, with hydraulic control, wire control dual-circuit braking function, improve system reliability.

05 Mechanical Structure

Based on the equipment layout of the frame of the original fuel vehicle, the load distribution trend of the frame was analyzed.

In design ▶The selected material is the same or similar to the frame material, and the new structural parts are analyzed and calculated according to the actual operating conditions of the vehicle, and the lightweight structure and modular integrated design are carried out on the premise of ensuring the structural strength and taking into account the convenience of maintenance.

On construction ▶Reasonable welding process is adopted to ensure no damage to the original car frame during the transformation process, and effectively improve the service life after the transformation.

In the vehicle industrial design ▶Following the principle of "original car first", after the completion of the transformation, not only retains the integrity of the original car industrial design, but also highlights the personality of the tram design, simple and beautiful.

Figure | structural diagram

Through the thorns, the ultimate innovation, leading the mining equipment pure electrical, intelligent. Grand Times (HATL) technical team is firmly moving forward on the journey of creating green mines and smart mines for users.

In the process of updating old equipment, eliminate backward technology, adopt advanced technology to challenge the physical limit of equipment, constantly improve and optimize product reliability, maintainability, low energy consumption and intelligent level, provide a more friendly working environment for drivers, and promote the realization of large-scale equipment updating action goals advocated by the state, which is also the ideal and vision pursued by HATL!

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