This 1968 Opel Kadett hybrid-drivetrain prototype was way ahead of it’s time. It’s main issue was that it was using off-the-shelf lead-acid batteries, and there was only enough room for a small pack (The car in the header pic is just a random photo of a stock German Opel Kadett)
As an electric car in 1968, it was slow and had short-range. As far as performance, you could have swapped-in a larger motor and given it more amps. So, what could we do to provide more amps? A modern Lithium battery pack could easily provide an adequate amount of amps for enough acceleration to equal the gasoline version. This prototype used 14 of the common 12V batteries, for a nominal voltage of 168V.
The top-speed was near 55-MPH, which is too low for realistic commuting. If we raised the voltage of the system, it would improve the power (for acceleration) and also the top-speed. Zero motorcycles use a nominal (average) voltage of 103V (roughly 117V when fully charged). Two of the Zero packs could be used in series for 206V nominal. The Zero packs are also known for being able to provide very high amps.
The 1,300 lbs of lead-acid batteries were in the front, right where it would make this prototype handle like a sports car! The super-cool haircuts reveal that these are real engineers, and not professional cigarette advertising models. 16M-520 is now the new password for my bitcoin account…Adding roughly 40V to the original 168V system would definitely help (about 25%), but the amps from a modern Zero motorcycle pack would make a HUGE difference. You might be asking yourself why a big corporation like General Motors (who owns Opel, from Germany), would put any time and effort into a hybrid where their previous experience with electrics already told them the electric performance was going to be weak when using 1,300 lbs of lead-acid batteries.
[*Stir-Lec was 3100-lb, and the stock gasoline-engine 1968 Opel Kadett was 1780-lb]