China Is Developing New GB/T Fast Charging Standard At 900 kW

JUN 19 2018 BY MARK KANE 28

According to the State Grid Corporation of China’s (SGCC) presentation, cited by the CHAdeMO General Assembly, China is developing a new version of GB/T fast charging standard.

The envisioned spec indicates power output beyond anything we’ve seen thus far – 900 kW at 1,500 V and 600 A!

Currently, GB/T was offering only 237.5 kW at 950 V and 250 A so this will be nearly four times more capable in terms of output. Power will be more than twice as high as the new 400 kW CHAdeMO and 350 kW CCS Combo specs too.

The new GB/T standard will be released in 2019-2020.

We should point out that this standard only exists in China, but once again it seems as though this nation is at the forefront of electric vehicles, both in regards to sales and now for charging technology too. This forward-thinking approach is sure to keep China in the #1 spot.

New GB/T Fast Charging Standard

New GB/T Fast Charging Standard

Categories: Charging, China

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28 Comments on "China Is Developing New GB/T Fast Charging Standard At 900 kW"

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I love all these crazy voltages. CCS 2.0 jumps to 1000V, Chademo follows suit. Now China is like 1000V we will do 1500V. Meanwhile no car on the road operates above 400V and that won’t change until the Porsche Mission E (800V nominal) hits the road.

The I-Pace is 450V

some BYD cars are 600V, I believe

Trucks , buses, etc.

Most likely these higher kW levels of 300+ are mainly useful for electric delivery trucks and such.

Yes exactly. Some heavy vehicles are running 650 VDC nominal batteries, but the semiconductors are more expensive compared to 400 V. Someone will start going above 1000 VDC someday, but costs are steeply higher at this point. So this Chinese extension is mostly hype for now. Note that IEC 61851 has listed 1000 VAC and 1500 VDC for years, in anticipation. (61851-1 Annex A is basically the Euro version of J1772.)

CCS is not 400 kW, it’s 350 kW max.

But at 700V. The systems are 500A.

The CharIN brochure says: “max. charging power up to 350 kW /
up to1000 V & current > 350 A”

It’s not 400 kW max, but 350 kW.

What systems are you referring to?

The ones that are installed. CharIn doesn’t say 350A. They say 350kW. They also say that this is just the physical implementation and that the protocol doesn’t have any limitation in that regard. They are also just a body providing suggestions for best practice. The sign is from a FastNed ABB combined CCS2/Chademo charger. They say output 500A max. They also call them 350kW charger. This is probably so they can keep the grid connection down to a sensible level while still providing full power at low voltages. It is also a common misconception that there is any difference in maximum voltage that a CCS rev. 2.0 charger can supply. The 150kW models will also supply 1000V and 500A. Just not at the same time.

Exactly, they say 350 kW and the slide in the article from InsideEV says 400 kW which is wrong. Your graphs clearly shows that it’s power limited, so we can’t just multiply max voltage and max amps.

Yes, CCS Type 1 is now officially 400A at 1,000V or, in other words, 400 kW.

The CCS Type 1 (North America, South Korea, etc.) DC connector is just a J1772 AC connector with an extra pair of DC pins so both the AC and DC Combo variants are defined in the J1772 spec.

This updated J1772 specification supporting 400 kW DC Combo was officially published in October, 2017. The link to the J1772 specification is inside the ElectricRevs article below where you can purchase it yourself if you want.

Once again:

Is InsideEV’s ever going to acknowledge this?

For those who don’t want to pay for a copy of the latest J1772 specification from SAE:

The references to 400A and 1,000 Volts are scattered in the document and are often in tables and illustrations with editing “change bars” indicating that the values were changed from the previous edition of the specification.

The isn’t much easily quotable text regarding the update to 400 kW but here’s a quote from page 97 of the latest official J1772 specification discussing a possible implementation scenario of the specification:

“The max current for the Combo connector is 400A…..”.

“Table 17 – Charging mode characteristics” on page 107 gives a specific example of a DC charger configuration with a “Power Max.” of “400 kW”.

“Table 12 – DC charging electrical ratings (North America)” shows “EVSE DC Output Voltage (V DC)” as “50-1000” and “Max Current (Amps-continuous)” as “400”.

It is not clear that present battery chemistry can charge at a 10C rate.

Present? This is for the future!

Not good business to invest in a possible future that may not happen.

It’s very good business to invest in the future by building to future standards, not present ones when the tech is advancing so rapidly year-on-year.

There are a large number of companies and university research teams spending a great deal of resources on finding ways to make batteries which can be practically charged much faster, and to commercialize that tech. I think it would be a very poor gamble to bet they are all going to fail!

You need to define the standard first so that cars can be designed to adopt them. That’s how standards work.

Yes titanate batteries used for some on route charging buses can charge at high C.
For typical overnight charging 324 kWh battery bus that are in use now it is just around 2C when you account for lower voltage at the start. Some go with 600-700 kWh batteries, it is closer to 1 C.

Why would you need 10C? 1C for a long range truck might be enough.

This is a crazy power! Just imagine if you’d suggested anything like this 10 years ago. They would’ve laughed at you.

Electric trains use megawatt level power and work fine for many decades. They even manage to move when connected to that power, no need for huge battery.

Yeah, 900 kW charging is completely normal /s

Several years from now, or maybe just a few, your comment is going to look rather short-sighted.

Maybe tesla superchargers could adopt the standard and Chinese car makers can sell more easily internationally after that. That would be brilliant.

Looks like they’ve designed a plug that’s a more appropriate size and shape for the voltage and current being carried. CCS plugs have, in my opinion appropriately, been criticized for being overly large and complex. Looking forward to use of higher charging voltages, the Tesla plug is probably too compact.

It is of course too much to hope that American and European auto makers would choose to adapt this new high-voltage Chinese charging protocol for their own standard, but I can at least fantasize about a world where that would happen! 🙂

“900 kW at 1,500 V and 600 A!”

Now that’s getting close to my vision of being able to charge a typical passenger car BEV for 300 miles of range in 10 minutes or less. Probably not quite there, but getting close!

I doubt that any production passenger car BEV is going to use anything close to that level of charging until they get mass produced battery cells which can charge much faster without overheating, but in the meantime while waiting for those batteries to be developed, this level of charging might be used for BEV heavy trucks.

Great job China for upping the charging standards, seems this will charge the vehicle to 100% in just 5 minutes. Those who are concerned about possible battery damage can charge up to 50% and then stop.

Kudos to Chinese for buying 95,000 electric vehicles last month and hopefully Worldwide 2018-05 sales should be in 150,000 range which puts it just behind 2017-12 which was a year end month.

I always thought 1500 volts was a good voltage since its popular in the drilling and mining industries, and its below the point of corona in most weather conditions. Delivers a fair amount of juice with not unreasonably sized cables.