Comprehensive Analysis of EV Charging Cabinet: Types, Principles, and Core Industry Knowledge

With the large-scale popularization of new energy vehicles and the strong support of relevant policies, the new energy vehicle industry has entered a period of rapid development, and users' demand for charging services has continued to rise accordingly. As an indispensable supporting infrastructure for electric vehicles, the core function of the EV Charging Cabinet is to provide stable and safe charging services for electric vehicles. Meanwhile, related equipment, such as fireproof battery charging cabinets and lithium battery charging cabinets, which are complementary to charging piles, have been continuously improved with the development of the industry, jointly building a diversified charging service ecosystem.

The classification of EV Charging Cabinets is diverse, with different classification criteria corresponding to distinct application scenarios and functional requirements. Clearly distinguishing the characteristics of various types of charging piles is the foundation for the rational layout of charging facilities. From the perspective of installation methods, they are mainly divided into Floor-standing charger (floor-standing charging pile) and Wall-mounted charger (wall-mounted charging pile). Floor-standing charging piles are suitable for parking spaces that are not close to walls, while wall-mounted charging piles are more suitable for parking spaces that are close to walls. These two types can flexibly cover the charging needs of different site conditions.

Based on their installation locations, charging piles can be categorized into three types: public charging piles, dedicated charging piles, and private charging piles. Public charging piles are installed at parking spaces in public parking lots (garages) and provide public charging services to vehicles in the community, often arranged in conjunction with Battery charging stations. Dedicated charging piles are constructed by construction companies in their own parking lots (garages) and are exclusively for internal personnel. Private charging piles are installed in individual parking spaces (garages) and specifically provide charging services for electric vehicles owned by individuals.

Based on the number of charging interfaces, charging piles can be divided into two categories: one-for-one charging and one-for-many charging. One-for-one charging refers to a charging pile that can only charge one electric vehicle, which is suitable for scenarios where charging needs are scattered. One-for-many charging, on the other hand, utilizes multiple interfaces to simultaneously charge more than one electric vehicle, making it ideal for areas with concentrated charging needs and enhancing site utilization.

In terms of power supply methods, the core types of charging piles are AC charging piles and DC charging piles, in addition to AC/DC integrated charging piles that combine both functions. DC charging piles are directly connected to the power grid and can directly charge electric vehicle batteries. They typically use a three-phase four-wire system or a three-phase three-wire system for power supply, with a wide adjustable range of output voltage and current, enabling fast charging. They are often paired with charging modules to enhance charging efficiency. AC charging piles do not have charging capabilities themselves and only provide power output. They require a connection to an on-board charger to complete the charging process. Due to the generally lower power of on-board chargers, fast charging cannot be achieved. AC/DC integrated charging piles can flexibly switch between charging modes. During the day, when there is a high demand for charging, DC fast charging is used, and at night, when there are fewer users, it switches to AC slow charging, adapting to different time periods' charging needs. It is worth noting that charging piles of different power supply types are often paired with corresponding specialized equipment. For example, lithium-ion battery charging cabinets are suitable for charging scenarios related to lithium-ion vehicle models, while 12V battery charger cabinets are suitable for specific low-voltage demand scenarios.

In addition to the aforementioned core categories, there are various types of charging equipment with specialized functions within the industry, such as Modular charging cabinet, Custom charging cabinet, as well as Dustproof charging cabinet, Waterproof charging cabinet, and Explosion-proof charging cabinet, which possess special protective properties and can accommodate charging needs in different environmental conditions.

The core of charging pile operation revolves around two key aspects: electric energy conversion and transmission, ensuring efficient and safe transmission of electric energy from the power grid to electric vehicle batteries. In the electric energy conversion process, the core component of the charging pile is the converter, whose primary function is to convert the alternating current (AC) input from the power grid into the direct current (DC) required by electric vehicle batteries. This process relies on precise regulation by the Battery Management System (BMS) to ensure that voltage, current, and other parameters match the battery's requirements.

In the aspect of electric energy transmission, there are primarily two methods: wired transmission and wireless transmission. Currently, wired transmission is the most widely used, which involves transmitting converted electric energy to electric vehicle batteries through charging cables. Wireless transmission, on the other hand, achieves contactless transmission of electric energy through magnetic fields. Its basic principle involves installing mutual inductance coils on the ground and the vehicle chassis, respectively. The input coil generates excitation current, and the output coil inductively acquires electric energy to complete charging. However, wireless transmission technology is still in the research and development stage, has not yet achieved large-scale commercial application, and faces limitations such as the need for precise coil alignment and one-to-one charging. In addition, the transmission logic of devices such as Electric Vehicle Charging Cabinets and Charging Docks follows the core transmission principle of charging piles, with efficient and safe electric energy transmission as the core goal.

This article comprehensively analyzes EV Charging Cabinet, combining the background of industry development to systematically sort out their multi-dimensional classification system, covering dimensions such as installation methods, locations, number of interfaces, power supply methods, as well as various subdivisions of protective and customized equipment. It deeply dissects the core working principle of "conversion + transmission" of charging piles, and explains in detail the core component structures, such as power supplies and control boards. By comparing the characteristics and applicable scenarios of DC fast charging, AC slow charging, and wireless charging, it explains the national standards for charging interfaces and the differences between fast and slow charging in terms of structure, cost, and battery impact. It emphasizes the importance of a reasonable combination of fast and slow charging for grid stability and demand satisfaction. Finally, it mentions the development trend of industry-specific charging equipment, showcasing the diversified construction of the charging service ecosystem.