Porsche 800V System Analysis

Porsche's 800V system has always been very curiousAs more car companies like the official to tell us about the engineering design, the media interviewed the two directors:Otmar Bitsche, Director of Development Electrics, Electronics, Electromobility at Porsche

Michael Kiefer, Director of High-Voltage Systems at Porsche EngineeringWe can interpret some information from the pictureHow many modules are divided into 90kwh is a problem, which is arranged in three columns

At present, 25 modules can be seen directly. According to the estimation under the cover plate, there may be a total of 30 modules, 3 modules eachThe two modules are bound together by VDA. According to the communication cable, it should be the design of distributed CMUThrough high voltage, the size and harness of the whole high voltage connector are relatively thin

Two large fuses are usedAn independent fuse is also configured on this sideThe copper bar treatment is also more interesting. I can't see the details

For the battery energy density interview, the old NCM 111, about 180wh / kg, may be usedCurrently high-voltage batteries using the latest lithium-ion technology are the gold standard. They offer an energy density of currently about 180 watt hours per kilogramCooling scheme

According to this design, the whole liquid cooling channel is integrated into the battery frame. The liquid cooling pipeline is taken from the frame, and the cooling plate is directly below the frame to form the outer frame and inner frameThe cooling line input is a red pipeThe output is blue tube, go straight down

About the design variant of 800V fast charging: how to make an 800V system compatible with the traditional 400V low-voltage charging pile of about 100kW on the battery system, Porsche's idea here is to use a variant booster to raise the voltage through the boost method.

We have two different variants, the charging park and the ChargeBox. The park is designed for locations with more available space in which a very high volume of charges is to be expected, 24 hours a day, seven days a week. With a small compact station, however, a charging park is possible in the city as well, for example in a residential area. For all areas with extreme space constraints, there is our second variant, the ChargeBox with an integrate battery. It can be connected to the normal low-voltage grid and enables fast charging in spite of its compact dimensions.

Summary: it's difficult for a normal Porsche car to match the standard. It's not the official information. It's not easy for us to decide on its sports car to see how to design it. Another very important thing is the integrated liquid cooling tray design. It's very interesting. Land Rover, Audi and Porsche all come here