الفرق بين هندسة 400 فولت و 800 فولت EV

There are two main solutions for that. One is to develop new battery technologies, such as solid-state batteries;the other is to upgrade the electrical architecture of EV from 400v to 800v.

Traditional cars have basic electronic equipment with a voltage architecture of 12V and are equipped with 12V lead-acid batteries for vehicle lighting, etc. While ev has such a 12v architecture too. Meanwhile, the power come from another lithium-ion battery packs, which consist of thousands of cells.

In case that you have a better understand about the charging experience. We will use a 125kw, 200A dc charger as a demonstration. Let's compare two EVs being charged: one with a 400V architecture and the other with an 800V architecture.

Power (W) = Volts (V) x Amperes (A). Ignoring the charging speed curve, when charging an 800V vehicle, 125kW/800V=156.25 A. The rated current of the cable is less than 200A, and the vehicle can fully utilize the 125kW charging power.

When charging a 400V vehicle, 125kW/400V=312.5 A, which exceeds the rated value of the 200A cable. At this time, the transmission power = 400Vx200A, which is only 80kW.

125kw VS 80KW, Obviously that 800v ev can get much more power in the same charging time.

So here is the conclusion about difference, please check the diagram below:

Charging speed:

400V: Peak power is limited by current (such as Tesla V3 supercharger 250kW);

800V: Directly increase power through high voltage. Porsche Taycan can reach 270kW at 800V supercharger (such as IONITY), and charging from 5% to 80% takes only 22 minutes.

Range:

800v: less components light weight, and the CLTC distance of Xiaopeng G9 is increased by about 5-7%;

Lightweight:

lower current and high voltage cable can be used. For example, the cable weight of Hyundai IONIQ 5 is reduced by about 30%.

Typical vehicle model examples

Representative models of 800V architecture

Porsche Taycan (the first mass-produced 800V model)

800V battery system, supports 270kW supercharging, 5%-80% charging in about 22 minutes;

The motor and electronic control are both adapted to high voltage, and energy consumption is optimized.

Kia EV6/Hyundai IONIQ 5

800V architecture supports 350kW supercharging (need to match the pile), charging to 80% in 18 minutes;

Equipped with a "boost", compatible with 400V charging piles.

Xpeng G9

China's first 800V mass-produced car, equipped with a 480kW supercharging pile, 5 minutes to replenish 200km+;

Full stack of high-voltage components (battery, motor, air conditioner).

Lucid Air

900V ultra-high voltage system, peak charging power 300kW+;

Ultra-low energy consumption (about 6.5km/kWh).

Representative models of 400V architecture

Tesla Model 3/Y

400V architecture, relying on large current to achieve 250kW supercharging, 15 minutes to replenish 250km.

With the development of electric vehicles, consumers not only need long battery life and strong power, but also lower energy consumption and shorter charging time. The development of electric vehicles is very fast, and more and more models use 800V architecture.

Ans provide high power connector for many dc charging station manufacturers all over the world. With a deck of items from 250a natural cooling and 600a oil cooling ccs charging cable, we help many OEMs on the dc charger which is compatible with 800v architecture car. With the endorsement of industry giant like chargepoint, we can help more manufacturers on the HPC cable.

Our HPC cable main has features below:

High-voltage design:

Voltage level: It needs to support 800-1000V high voltage (the ordinary 400V cable withstands about 500-600V), the insulation layer is thicker, and the material has stronger resistance to electrical breakdown.

Safety redundancy: 20-30% voltage margin is reserved during design to prevent leakage caused by aging after long-term use.

Low impedance and high temperature resistance:

Conductor material: Use high-purity copper or silver-plated copper wire to reduce resistance (800V system current is smaller, but loss still needs to be reduced).

Temperature resistance level: Long-term tolerance of 105℃-125℃ (ordinary cables are about 90℃), and the cable temperature can be controlled during extreme fast charging.

Lightweight and flexible:

Wire diameter optimization: Because the current is halved (under the same power), the conductor cross-sectional area can be reduced, and the cable is lighter (for example, the Porsche Taycan charging cable is 15% lighter than the traditional cable).

ANS has been committed to finding practical solutions to promote the progress of the charging industry and Stay tuned for ANS EVSE ~