The Role and Principle of Power Modules
Power modules are the "super charging heart" in the charging pile, specially responsible for converting grid electricity (alternating current, AC) into electricity usable by electric vehicle batteries (direct current, DC). Simply put, they mainly perform three key functions:
- As a High-speed Charging Expert
Rapid Power Conversion: Like quickly pressing tap water (AC) into bottled water (DC), they achieve nearly no waste (efficiency exceeding 96%).
Scalable Power Output: one module (30kW-40kW) can output 30-40kW of electricity per hour. For higher power needs, multiple modules can be installed. For example, 4 modules can boost the charging pile’s power to 160kW, charging an electric vehicle to 80% in half an hour (similar to mobile phone fast charging).
- As an Intelligent Nanny
Automatic Voltage/Current Regulation: intelligently adjust the voltage and current based on battery status, just like a mobile phone slowing down charging when nearly full to prevent overcharging.
Safety Protection: Instantly cuts off power in case of overvoltage, overheating, or reverse wire connections, offering even higher safety than mobile phone chargers.
- As a Cost-Effective Workhorse
Durability: Designed for a minimum 8-year lifespan, it operates normally in extreme temperatures, from -30°C (freezing winters) to 70°C (scorching summers).
Cost Efficiency: Accounting for nearly half of a charging pile’s cost, many domestic manufacturers have reduced prices through technological advancements. It also supports remote upgrades, eliminating the need for on-site maintenance.
Principle in a Nutshell
Grid AC power → "Chopped" into DC power within the module → Adjusted to the battery’s required voltage → Safely delivered to the vehicle.
