A few nice electric bikes images I found:
Graham’s Electric Bike
Image by carrott
“Surprise! – The remarkable rise of electric bikes in China.”
From a demonstration of 100 bikes in 1994 to 20M eBikes and scooters per year in China today. Even remote rural china.
Some data on Chinese eBikes:
• Cost: 0-450
• Top Speed: 16-25MPH
• 350-750W (.5 – 1hp)
• 20-40 mile range
Even cheaper than commuting by bus in China.
Much less particulate matter -> leading to Chinese push. Point source of particulates is worse than power plant far from urban center.
Drivers of eBike Growth in China:
• disposable income: went up 2x to 00/yr
• Late 90s – gas scooters banned in many cities. 53K scrapped in Shanghai
• 2004 ebikes given right to use bike lanes. “as long as it has pedals.” Also useful if you run out of charge
• 2006: Beijing repeals bans on eBikes. Guangzhou: banned all motorized 2-wheelers
• Tech: 2005-9: switched to brushless motors: 50->85% efficiency. Valve-regulated lead acid batteries: Energy Density up 33%, life up 35%, better cost and weight.
• Externalities: 2003: SARS –> fear of buses and mass transit
Survey: If no eBike, 10% would have taken cars! They have cars, but prefer the eBike for commuting (most would shift to buses, or regular bikes)
How many would have bought a scooter if ban was not there? Most people shift to eBike from bicycles and public transit for cost. 20% would have bought a gas scooter had they had that option.
EV bike: growing and adding wheels. Some are beyond regulations on weight and speed. Some manufacturers are becoming EV car makers. [Low-speed EV examples below]
Shift to LiIon:
Valve-regulated lead acid (VRLA) vs. LiIon Batteries:
• Cost: 0 vs. 0
• Mass: 26 vs.8 kg
• Lifetime: 1.5 vs. 4.5 years
50K/yr estimated EV car sales in China. Resistance points: charging infrastructure (vs eBike – can remove battery easily, and carry inside), battery safety, cost.
Public transit is not keeping up with urbanization.