E-Power-Station of the Future

Description of our product BWS 4.0

  • Our product for e-taxis and e-car-fleets is the BWS 4.0, which allows permanent battery swapping in 1.5 minutes for compatible e-cars. In Berlin (see Laatzig-Berlin) these e-cars will be available in summer 2021; they are an innovation of SAIC Roewe, a brand of SAIC. Within Germany SAIC is well known as Chinese joint venture partner of Volkswagen, respecting in all sectors the quality standards of Volkswagen. A recently swapped battery enables the compatible e-car to drive 200-250 km in one turn. The payment (max. 35-45 cents for 1 kWh flanked by tax relievers) can be done automatically after the swap has been finalised and is based on the kWh-consumption of the delivered used battery (all batteries will be checked during the swapping process and have to fulfill the Laatzig-SAIC-standard).
  • Every compatible e-car can use our swapping stations which will be implemented on well selected sites. For the near future we plan to substitute parts of traditional fuel stations to get both: traditional fuel offers plus attractive swap facilities. Our swapping stations with a swap turnus of 1.5 minutes allow theoretically more than 900 swaps per day; in reality 400-500 swaps per day are possible, if modern apps for high tech-managed e-fleets are in charge.
    These big volumes which are comparabel with the traditional “fossil” turnovers allow to maintain the classic station structure with its periphery of additional services. The secret is the high consumer demand per station which depends on the daily car frequencies. Every plug-in causes waiting times and consequently not enough consumers for a doable service-configuration. Our technology is the missing link to a self-reliant e-filling-station with a multi-use-embedding.
  • Battery swapping is a technology with a R&D-background of nearly 20 years. Today it is fully optimized. Hundreds of stations, thousands of of swapping e-cars daily demonstrate the market ripeness of the product. A swapping station BWS 4.0 for e-cars (“Small Hub”) has a regular size of approx. 150 square metres (14,55 m * 10,5 m) and a height of 3,2 m. It can be frequented by normal e-cars with batteries between 40-70 kW technical capacity. It is also available for small transporters up to 3,5 metric tons. The swap-method is the battery-change through a car-bottom frame by a robot system which delivers in time filled batteries from a battery storage with a permanent recharging and a small battery stock (factor 1.3) in order to secure the continuation of the process. The e-vehicle enters the swap box on a ramp and stops directly above the changing duct; after the swapping process the customer can pay nearly nonstop the electronic kWh-bill and continue the drive-through, without relevant time losses.
  • For an installation with 200 battery swaps per day and a daily e-filling of 40 kWh per battery a nominal voltage of 10 kV (transformed to 380 V) is needed. The required nominal electric power amounts 1.000 kVA. If 40 batteries have to be recharged within 6 hours (C=0,313), a charging electric power of 11 kW per battery is necessary: 40 * 11 kW.
  • For “Big Hubs” with taxis, buses and trucks as permanent customers the required nominal electric power is obviously higher, as well as the positive storage-effects for the smart grid which permanently requires regulating energy for its volatility problems! Every swapping unit is an aggregation of accumulators which can support the instable future grid if swapping stations and virtual powerplants will be managed as common system. A smaller swapping station needs approx. 3 million kWh per year. A net of 30 normal stations requires more than 80 million kWh per year. These volumes are extraordinary high and secure optimal electricity purchase prices.