SIMDrive first developed car to achieve lightweight through hydroforming and CFRP
Japanese electric vehicle (EV) development company SIMDrive announced that the second phase of the advanced development vehicle project "SIM-WIL" (hereinafter referred to as WIL) launched in January 2011 has been completed (Figure 1). The development goal is to trial-produce the first development car that is expected to start mass production around 2014. 34 companies and groups intending to get involved in the EV business have joined.
WIL increases the number of batteries compared to the first pioneer vehicle "SIM-LEI" (hereinafter referred to as LEI), which can travel 351km on a single charge, and also achieves a spaciousness comparable to the body of B-class and E-class cars Interior space. In addition, the acceleration time from 0 to 100 km / h is 5.4 seconds, which is comparable to that of mid-level sports cars.
The first advanced development vehicle LEI is equipped with a Toshiba lithium-ion rechargeable battery "SCiB" with a capacity of 24.9kWh. The cruising range was 333km at the time of initial release (JC08 mode, and then adjusted to 268km based on underestimated driving resistance etc.) This time, the WIL is equipped with a lithium ion rechargeable battery (18650 type) produced by Panasonic with a capacity of 35.1kWh and a cruising distance of 351km. Even if compared with the corrected value of LEI, the driving distance per kWh of the battery equipped by WIL is about 10% shorter.
In this regard, after the LEI, the executive director of SIM-Drive, the director of the vehicle development department and the project manager of Zhi-Drive, who once again served as the head of WIL development, explained the purpose of WIL development: "SIM-LEI pursues the" only efficiency theory ", The design also puts aerodynamic characteristics first. The goal this time is to create a 'B-class mid-range' vehicle that can be favored by more consumers. "
The original LEI emphasized aerodynamic characteristics, resulting in a special design that narrowed the rear of the vehicle significantly in the left and right directions. Therefore, after seeing the LEI, the user said, "Is it impossible to become an EV without this design?"
Comparing the body dimensions of WIL and LEI, it can be understood that the wheelbase of both vehicles is 2950mm. The dimensions of WIL are 4150 & TImes; 1715 & TImes; 1550mm in height; 4700 & TImes; 1600 & TImes; 1550mm in LEI. The length of WIL is greatly shortened and the width is larger. This change is disadvantageous from an aerodynamic point of view. It is clear that the power consumption per unit of driving distance will increase, but WIL still uses a body size close to the B-level mass-production engine models.
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