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README.md

open ebike building projects

Table of contents

Introduction
components
1. Sub paragraph
Another paragraph

introduction

this repository documentents the progress to a open hardware ebike. this project include the research on the ebike part market to see what technology is most common and which ne invention are relevant

components

kits

(Bafang 36V 250W Ebike Motor Wheel Electric Bike Conversion Kit 20/26/27.5/700C inch Rear Hub Engine with 22.5Ah Bicycle Battery)[https://www.aliexpress.com/item/32908957618.html?spm=a2g0o.productlist.0.0.124d29abXwvWZC&algo_pvid=629160d2-6c5a-4921-8f98-b1ef6bd79b3a&algo_exp_id=629160d2-6c5a-4921-8f98-b1ef6bd79b3a-44&pdp_ext_f=%7B%22sku_id%22%3A%2212000027049288761%22%7D&pdp_npi=2%40dis%21EUR%21%21406.42%21%21%21%21%21%40210318b916528016675078749e86b6%2112000027049288761%21sea]

alt text

Basic Block Diagram of Pedelec Model E-bike

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electric-bicycle-electric-motor

motor

alt text

hubmotors

https://www.electricbike.com/hubmotors/

Motor Specification (example):

Motor Model: BBS01B Bafang Model: MM G340.250 Power:250W Voltage:36V Controller Current: 15A No Load Speed(RPM) :83-87 Load Speed(RPM):78-83

MAX Torque:80 N.m

Top Speed:28km/h

Efficiency: > 80%

PAS SENSOR : Speed Sensor

Reduction Ratio: 1 : 21.9

Certification: CE/EN 14764/ROHS

Waterproof Grade:IP65

Bracket bottom length:68mm

Operation Temperature:-20-45℃

Waterproof Grade: IP65

Display Working Temperature: -20-80C

gear

power transmission

https://www.elecycles.com/blog/post/how-much-do-you-know-about-the-e-bike-motor-parameters/

battery

charger

controller

(E-bike Charger Reference Design)[https://www.monolithicpower.com/reference-design-electrical-bike]

alt text

controller board

alt text

display

alt text

accelerator throttle

breaks - break sensor