I tried to "experience" the charging of Porsche "Taikan" ... What is the problem of CHAdeMO quick charging?

I was able to ride the Porsche "Taikan" at the test drive event hosted by the Japan Automobile Importers Association (JAIA), so I investigated the response and efficiency of CHAdeMO's quick charging.

Charger information on the route that EV owners care about

Porsche has deployed 90kW quick chargers in Ariake showrooms and some authorized distributors, and will also introduce 150kW chargers in the first half of 2010. We also recommend that dealers and distributors around the world install quick chargers. This is because Porsche, which has a large capacity battery of around 80kWh, recognizes the need to develop its own charging infrastructure for owners.

However, the reporter is an amanojaku, and it is part of his job to ask questions. The inside out raises the annoying question, "Isn't it inefficient except for a dedicated charger?" Therefore, I decided to try what happens when I charge the Taycan with CHAdeMO. There is a lamp line (AC100-200V) at the test drive venue, so if you have a cable, you can charge normally. There were several ordinary charging ports installed at the venue, but I'm still interested in the information on the quick chargers on the route.

If you are an EV owner, you know that the charging efficiency changes depending on the compatibility with the charger and the charging conditions (battery temperature, weather, etc.). In rare cases, a problem with the charger or software on the vehicle side may result in an error or the charger that should be usable cannot be used.

The charging data of the actual vehicle and a specific charging spot, and the information that "the Taycan was able to charge at that charging spot" should be helpful.

Try the DC quick charger at Oiso Town Hall

The test drive event was based on the parking lot of "Oiso Prince Hotel" (Kanagawa Prefecture), and the course was not set in particular and only the time limit was set. As for the quick charger, there is "Oiso Town Hall Main Government Building" at a distance of about 3km from the venue, and it is said that there is a 50kW DC quick charger there. Charging spots can be easily searched from the navigation screen. Simply tap "Charging Spot" from the menu to see a list of the nearest quick chargers.

Since it was a weekday, the charger was vacant. The Taycan has charging ports on the front left and right fenders. Normally, this type of EV has a normal charging port on the driver's side (right if it is a right-hand drive). The passenger seat side (same as left) is the DC quick charging port (CHAdeMO).

As an aside, if you have a 200V AC outlet at home, you can charge it with the included cable. The 3kW (AC200V) outlet, which can be constructed in most houses for around 10,000 yen, is not enough for Taycan. If you do not install the 11kW outlet specified by the dealer, it is easy to happen that overnight charging is not enough.

To use the charger at Oiso Town Hall, you need to apply to the reception desk of the government building and get the key. At the time of the visit, in order to avoid unnecessary face-to-face contact due to Korona-ka, the key was released and it was written by himself in the usage book. There are small differences in these usage procedures depending on the installation location, but it is also a matter of etiquette and I want to make sure to follow them.

A common mistake is "refill charge". If you understand the principles of lithium-ion batteries and charging, you'll know the ridiculousness of continuing to charge. The efficiency of the charger decreases as charging progresses. As the power of the battery increases, a larger voltage and current are required for charging. The control of the charging software adjusts the output while observing the load and temperature of the battery. Charging is performed with maximum efficiency up to around 50%, but the output is reduced from around 60%.

Charging result: The battery level is high and the maximum efficiency is not achieved.

However, the test drive Taycan had more battery power than I expected. It was about 88% at the start of charging. This is not a charge test with maximum efficiency, but I decided to continue the test because it was a big deal.

The results are as follows.

Charging start: 408V 82A 33.456kW 10 minutes passed: 413V 71A 29.323kW 20 minutes passed: 415V 55A 22.825kW Immediately before stopping: 415V 43A 17.845kW

Final electric energy (approximate) 10.22kWh Battery level: 96% Battery temperature: 29 degrees

A 30-minute timer was set for the charger, but this time it was interrupted by pressing the stop button after 20 minutes without waiting for the timer to automatically end. As you can see from the results, it is a 50kW charger, but if the remaining amount exceeds 80%, the maximum output is only around 30kW. It peaks a few minutes after the start and then charges while lowering the output. This is the correct behavior for a charger.

After about 20 minutes of charging, 88% of the vehicle's display has recovered to 96%. If the cruising range is 360km, it will be about 29km. If the battery level is around 50%, you should be able to extend the distance even in the same 20 minutes.

Expected to increase the output of CHAdeMO

The current CHAdeMO is mainly 25 to 50 kW, and 90 kW chargers are still few. The Taycan sold in Japan has its socket shape and charge control software adjusted to support CHAdeMO. Of course, you can use the quick chargers on the highways and roadside stations.

The cruising range of the Taycan varies depending on the capacity, model and drive system of the installed battery, but the sports sedan type that was tested is equipped with a 79.2kWh battery and has a cruising range of 364km (Porsche Japan site notation). Similarly, on the Porsche Japan site, the 360km notation "Taikan Turbo" has a value of about 320km in the EPA. Generally, the measurement conditions of EPA are closer to the actual measurement than WLTC and others. For average driving conditions, 300km is a good guide.

The charging performance of Taikan is said to be compatible with DC voltage (DC) 800V and charging output up to 270kW. IONITY, which develops charging services in the EU, has a quick charger of up to 350kW. Not all EU EV chargers have this spec, but with this spec, fast charging from the remaining 5% to 80% can be done in as little as 22.5 minutes.

The charging voltage of CHAdeMO is 400V. The maximum output is a 90kW charger. Most of the ones installed on SA / PA on highways are 50kW, and switching to 90kW has begun. Most roadside stations and convenience stores are around 20kW.

As a standard, it can support 150kW, but since the voltage is 400V, if you increase the output, it is strict even at 150kW considering the thickness and cooling of the cable (the cable becomes thick and heavy and it becomes difficult to handle). In Japan as well, the voltage applied to the electric pole wire is 6600V, so it is possible to make a charger with 800V, 900V, and an output of 300-500kW, but considering the demand and load around 2010 when CHAdeMO was established, this is the case. It has become.

Many imported cars are large-capacity EVs such as the Taikan and Audi "e-tron" that assume high-power quick chargers, and in the future, even domestic EVs such as the Nissan "Aria" and Toyota "bZ4X" will have a battery capacity of 70kWh or more. Things are expected. Since EVs for medium-duty trucks and commercial vans have begun, CHAdeMO is expected to have higher output.