Application of MOS and IGBT in charging piles
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Application of MOS and IGBT in charging piles

Posted Date: 2024-01-26

1. Introduction to charging piles

Charging piles refer to charging devices that provide energy supplementation for electric vehicles. Their functions are similar to the gas dispensers in gas stations. They can be fixed on the ground or walls and installed in public buildings (public buildings, shopping malls, public parking lots, etc.) and residential areas. In parking lots or charging stations, various models of electric vehicles can be charged according to different voltage levels.

The input end of the charging pile is directly connected to the AC power grid, and the output end is equipped with a charging plug for charging electric vehicles. Charging piles generally provide two charging methods: conventional charging and fast charging. People can use a specific charging card to swipe the card on the human-computer interaction interface provided by the charging pile to perform corresponding charging operations and cost data printing. The charging pile display screen can Displays charging capacity, cost, charging time and other data. Charging piles can be divided into DC charging piles, AC charging piles and AC-DC integrated charging piles according to their charging methods.AC charging pile

The AC charging pile is a power supply device that is fixedly installed outside the electric vehicle and connected to the power grid to provide AC power for the on-board charger of the electric vehicle (that is, the charger fixedly installed on the electric vehicle). The AC charging pile only provides power output and has no charging function. It needs to be connected to an on-board charger to charge the electric vehicle, which is equivalent to just controlling the power supply.

Its characteristics are: low charging power, long charging time, but low cost of charging equipment.

DC charging pile

The basic components of a DC charging pile include: power unit, control unit, metering unit, charging interface, power supply interface and human-computer interaction interface. The power unit refers to the DC charging module, and the control unit refers to the charging pile controller. In addition to the above core components, a DC charging pile also has other important small components, such as sheet metal parts, fuses, relays and lightning protection devices. The DC charging pile itself is a system integration product. In addition to the two components "DC charging module" and "charging pile controller" which form the core of technology, structural design is also one of the key points in the reliability design of the entire pile.

The picture shows the principle of AC and DC charging

2. Charging pile market analysis

my country's charging modules have gone through three generations of development, from the first generation 7.5kW to the second generation 15/20kW, and are now in the conversion period from the second generation to the third generation 30/40kW. Domestic manufacturers Infineon, Yonglian, and Youyou Green Companies such as Nenghe Dianwang Quick Charge have the ability to mass produce and use 40kW charging modules, and high-power charging modules have become the mainstream of the market. In the current domestic market, 25% of the charging power is 60kW, 120kW and 150kW charging piles occupy 30% and 32%, and only 5% have a power exceeding 150kW.

In order to solve the charging problems faced by new energy vehicles, the state has vigorously promoted the development of charging infrastructure from the policy level. New energy subsidies have shifted from "vehicle replenishment" to "pile replenishment", charging infrastructure construction has been included in "new infrastructure", and a number of policies have been continuously introduced. , effectively promoting the rapid development of charging infrastructure. As of the end of 2022, the number of charging piles of various types across the country has reached 5.21 million, and the vehicle-to-pile ratio has reached 2.5:1. Data statistics predict that the total DC charging pile market in 2023 will be 11.7 billion, with an increase of 410,000 units, and a CAGR of approximately 53%. It is predicted that the total MOS and IGBT charging pile market in 2023 will be 1.1 billion yuan.

3. Product applications and advantages

Typical topology of charging piles

For the charging pile market application, Longteng Semiconductor's high-voltage super-junction MOS has product advantages:

For LLC topology, optimize the body diode, enhance di/dt capability, and reduce Qrr and drive interference;

Optimize Vth to make multi-tube parallel operation more reliable;

Optimize Qg and Coss/Ciss ratio to reduce drive loss and improve drive anti-interference ability;

Optimize EAS and enhance avalanche resistance.

For the charging pile market application, Longteng Semiconductor's IGBT has product advantages:

Optimize Vceset to reduce conduction loss and reduce temperature rise;

Optimize anti-parallel diodes to enhance di/dt capabilities;

Optimize switching speed, switching frequency can reach 60kHZ.

The above advantages make Longteng products safer and more efficient in charging pile applications.

4. Longteng MOSFET selection table for charging piles

Function Topology Product Series Product number AD-DC Vienna Rectifier 600-700V SJ MOS 650-1200V IGBT LSB65R041GF LSB65R030HT LKB75N65TM1 ​​LKB40N120MF DC-DC Interleaved Full Bridge LLC/PSFB DAB 600-700V
SJ MOS LSB65R041GF LSB65R31HF LSB60R029GF LSB60R021HMF

Note: The above information and data come from Longteng Semiconductor




Review Editor: Liu Qing


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