Application Analysis Report of Liquid-cooled Pump for Fast Charging Pile

Ⅰ. Introduction

In recent years, with the popularity of electric vehicles and the support of national policies, the charging pile market has gradually emerged as an emerging industry. In the meantime, the application of charging pile liquid cooling technology has also become a new trend. Liquid cooling technology can not only improve the charging efficiency of fast charging piles, but also extend the service lifetime of charging piles. As the core component of a liquid-cooled charging pile, the performance and stability of a micro pump are crucial to the operation of charging pile. Therefore, an in-depth study of the trend of liquid cooling of fast charging piles and the application characteristics of micro pumps is of great significance to promote the development of the charging pile industry.

Ⅱ. The Current Situation and Trend of Charging Pile Industry

In recent years, China's new energy vehicle market has developed rapidly, with rapid growth in ownership and an obvious increase in demand for electric vehicle charging.

According to the statistical data of Wisdom Research Consulting, as of December 2022, the cumulative number of electric vehicle charging piles nationwide was 5.21 million units, an increase of nearly 100% year-on-year. Among them, 1.797 million units are public piles, accounting for 34.5%; 3.413 million units are private piles, accounting for 65.5%. It is expected that the number of electric vehicle charging piles in China will reach to 10 million units in 2025.
In this fast developing industry, all kinds of technology and equipment are also widely used, and micro liquid cooling pump is one of them.

Ⅲ. Principle and Application of Liquid Cooling Technology for Charging Piles

The application of liquid cooling technology in fast charging piles has become more and more common.

Fast charging pile is mainly composed of charging module, controller, liquid cooling system, cabinet and other parts. In the liquid cooling system, coolant is circulated to the key components such as battery pack, charging module and controller through the pump, to ensure the normal operation of the system by dissipating heat from these components. In the design of the charging pile, the liquid cooling system can also be adjusted according to the power requirements of the charging pile, to ensure its maximum cooling performance.

Liquid cooling technology can also be used in the charging cable. The high power liquid-cooled charging connector is driven by an electronic pump to drive coolant flow. When the coolant passes through the liquid-cooled cable (the liquid-cooled cable will give out heat due to carrying high current during operation, it takes away the heat from the cable and charging connector, returns to the tank (storage of coolant), and then is driven by the electronic pump through the radiator to dissipate heat. Working in this cycle, it can achieve the requirements of high current and low temperature rise through the small cross-sectional area cable.

The liquid cooling method allows the coolant to be recycled, and the closed cooling environment ensures heat dissipation efficiency and the cleanliness of the process. Compared with traditional air cooling, it dissipates heat better and has a longer lifetime, so it is increasingly popular.

Ⅳ. Application of Micro Water Pump Technology in Charging Pile Liquid Cooling System

1. Application of Micro Water Pump in Charging Pile Liquid Cooling System

As part of the liquid cooling system, the water pump circulates the liquid and transfers heat from the charging pile to the radiator. In the charging pile liquid cooling system, micro water pump is widely used in small charging piles and mobile charging equipment, which has the advantages of small size, low energy consumption and low noise. Micro water pumps are usually powered by DC power and can also be used in combination with renewable energy technologies such as solar panels, to achieve more energy efficiency and environmentally friendly purposes.

2. Advantages and Disadvantages of Micro Water Pump

The application of micro water pumps in the charging pile liquid cooling system has the following advantages:

• Small size, light weight, easy to install and move;
• Low energy consumption, can save energy and reduce operating cost;
• Low noise, will not cause interference to the environment and users;
• It can be used in combination with renewable energy technology to further improve the effect of energy saving and environmental protection.

Some common water pumps on the market also have the following deficiencies when applied to the charging pile liquid cooling system:

• The flow rate and water head are limited, and the scope of application is relatively narrow;
• It is difficult to maintain and needs regular inspection and replacement;
• Some micro-pumps have a short lifespan and need to be replaced frequently.

Ⅴ. TOPSFLO Liquid Cooling Solution

TOPSFLO INDUSTRY AND TECHNOLOGY CO., LIMITED mainly produces micro brushless DC water pumps, micro diaphragm pumps, micro gear pumps and other products, which are widely used in charging pile liquid cooling systems, medical equipment, industrial automation equipment and other fields. The product performance is stable, and has obtained many certifications and honors, such as CE certification, RoHS certification, ISO9001 quality management system certification, National High-tech Enterprise, Specialized and New Enterprise in Hunan Province, etc.

TOPSFLO is a micro-pump enterprise that entered the field of liquid cooling applications for charging stations earlier in China, and it currently holds a significant market share in the field of liquid cooling water pumps for charging stations. Since 2015, TOPSFLO has provided 300,000 liquid-cooled water pumps for world-renowned electric vehicles and energy companies, and has a professional and mature fast charging pile liquid cooling solution.

1. Customized service. TOPSFLO is a liquid-cooled pump manufacturer with independent technology development capabilities. It has an independent R&D and technical service team. When the standard products do not fully meet the customer's design standards, it can customize the liquid-cooled pump according to the needs of the customer's system. Size, flow rate, water head and other performance parameters can be customized, and different motor types, electronic components, etc. can be provided.

2. Small size and low noise. Charging piles, especially fast charging piles, are usually installed in residential areas, business districts, office areas, and parking lots where people's daily activities are frequent. TOPSFLO strictly controls the noise of the pump and the space it occupies. It is small in size and has a patented silent design, which will not affect the surrounding environment and users.

3. High reliability and low energy consumption. Fast charging piles usually need to complete the charging task in a short time, and at the same time need to run stably for a long time. Therefore, it is necessary to choose a micro liquid-cooled water pump with high reliability and low energy consumption to reduce the impact on the power supply of the charging pile. TOPSFLO has introduced more than 100 sets of international advanced production equipment, using imported raw materials of well-known brands, high-efficiency motors and precision pump head design, which can reduce energy consumption and improve charging efficiency.

4. Long service life and maintenance-free: the working environment of the outdoor charging pile is relatively harsh. In order to ensure its long-term operation and avoid the trouble of replacement or maintenance, the water pump needs to have a long working lifespan. Due to the high reliability of its components and rigorous life testing, the lifetime of the water pump can reach 30,000 hours, and it is maintenance-free.

In short, the miniature pumps produced by TOPSFLO make up for the shortcomings of ordinary water pumps in the industry, and can be accurately applied to fast charging piles. At the same time, the delivery, pre-sale technical consultation and after-sale technical support of TOPSFLO pumps can be guaranteed. It is an ideal choice for liquid-cooled water pumps in fast charging piles.