Introduction to the development trend of charging modules

Standardization of charging modules

1. The standardization of charging modules is constantly increasing. The State Grid has issued standardized design specifications for ev charging piles and charging modules in the system: Tonghe Technology’s products are mainly 20kW high-voltage wide-constant power charging modules and 30kW and 40kW high-voltage wide-constant power modules that meet the “six unification” standards of the State Grid;

2. The “three unifications” of the charging module: unified module dimensions, unified module installation interface, and unified module communication protocol. The standardization of the design specifications of dc charging stations and charging modules has solved the problem of poor product compatibility in the previous market to a certain extent, and will effectively promote the rapid development of the charging pile industry.

The charging module is developing towards high power

The power of a single charging module has gradually evolved from 3kW, 7.5kW, and 15kW in the early days to 20kW, 30kW, and 40kW now, and continues to move towards higher power levels such as 50kW, 60kW, and 100kW. This power upgrade not only means that more power can be output per unit time, but also significantly increases the value and profitability of charging module products. With the advancement of technology and the continuous expansion of the market, the charging module industry will continue to usher in more development opportunities.

For example, in the current charging pile market with a single gun ev charger power of 60-120KW as the mainstream, the 15KW module can also meet the market demand, but many pile enterprises use 40kW modules with lower cost per watt based on the cost of the whole machine. In fact, the larger the number of system modules, the smaller the overall impact of a single module failure. Vehicle owners do not need to bear the risk of extended charging times due to reduced system availability. When charging pile operators do flexible charging intelligent allocation, they expect the module granularity to be smaller, which is easy to schedule and distribute, reduce power waste, have less impact on the availability of the system by a single fault, and reduce the requirements for operation and maintenance timeliness. Therefore, at present, the layout of mainstream enterprises is relatively perfect, and the market coverage is mainly 30/40kW products.

 V2G bidirectional charging technology

In addition to the traditional charging function of electric vehicles, charging modules are also developing bidirectional charging technology. The development of bidirectional modules has further enabled V2G technology and V2H technology to be realized, which has played a positive role in peak shaving, balancing power load, and improving the efficiency of charging piles.

The optical storage and charging integration policy provides a top-level policy design for intelligent and orderly charging, two-way charging and discharging, and determines the direction for charging stations to participate in application scenarios such as peak and valley regulation of the power grid, virtual power plants, aggregation transactions, and integrated charging and storage, but these are inseparable from the hardware foundation guarantee of the two-way V2G charging module. At present, China BeiHai has an absolute advantage in the market share of BeiHai Power V2G modules, and the V2G charging piles in the power grid system are dominant.