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yes, but only to customers who need to outfit a second bike using the battery we supplied and to installers because of product liability.

there are several aspects that need protection in a new crank drive motor: 1. the shapes of the casing, the dimensions of the motor, commonly known as the design elements 2. the main sensors. There are 3 types of sensors in a crank drive motors: a torque sensor, a movement detector and a cadence...

I can't see piezo-electric effect being used as torque sensor in the context of a crank drive motor though. The pedalling torque is usually translated into an angular displacement of the chainring versus the crank. That has been used in countless designs. To measure the displaced angle, a Hall...

It's an old picture. It goes to show that I am a natural conservative! BBS01B for a long time, since 2014? AFAIK, Bafang don't make the original BBS01 version since around that time. The main improvements were water proofing and better quality FETs. I haven't replaced a single FET in BBSes for...

The idea of a very poorly lit cave, freezing water, completely disoriented, all your air in a bottle is just too frightening to contemplate.

Perhaps not that low 2.6wh per mile, but because you spin the cranks quite fast, battery consumption is lower than average. Next time you put the battery on charge, note the miles since last charge and the time from beginning to the led on the charger goes green. Knowing that the charger...

If you have knee pain, start off using the throttle then pedal.

suing in Europe is straightforward. 1. Buy one of the kits they are selling. You need this to prove your case. 2. Check which part or parts you think they have used your patent or patents without your consent. 3. If you think you can prove the infringements, hire a patent lawyer. There are...

so what's different compared to the TSDZ2's torque sensor? The TSDZ2 uses two coils, the induction current in the induced side gives the torque measurement:

the TSDZ2 has also FOC controller. Can you give us more details about your strain gauge torque sensor? Drawings will be useful. is it fitted to both the DM01 and DM02 and available as spares?

The battery indicator shows a voltage between 41V (completely empty) and 54V (completely full) in 5 bars, each roughly corresponds to 20% or 13V/5=2.6V. You can see the voltage drops when climbing a steep hill, you lose a bar or two during the climb and recover after the climb, although the...

Beside manufacturers' specification sheets, there are two standard pieces of information on the cells: UN38.3 and MSDS Material Safety Data Sheets). All suppliers must have them as they are required for any shipment. The issue arises mainly from poor quality control in manufacturing, mismatched...

The frame will take either. If I use the tsdz2, the bike will be 21kgs instead of 20kgs. If I use the bbs01, 21.5kgs with 36v 12ah battery. Then, it would be tempting to fit a 3 speed hub gear. I did something similar about 9 years ago. https://wooshbikes.co.uk/?zephyr-cdn It's difficult to...

Your cadence (90rpm) is ideal for the TSDZ2 so 70 miles may be achieveable with the 488WH bag battery. That averages about 6.9WH per mile. 35 miles if you ride on throttle.

the 90 psi was in the Woosh Faro, 700C x 28

Ouch..! I thought I fixed this error sometimes ago, but obviously not. We inflate the front tyre to 40 psi, rear tyre to 45 psi before they leave us. Very sorry! I'll fix it in a few minutes. https://wooshbikes.co.uk/manuals/Rambletta-2023.pdf

I can see that you take a lot of precautions but I would like to add a word of caution for anyone who considers repairing or modding their battery and or chargers: product liability insurance will not honour their contract if you modify the product without being directed by your suppliers. You...

Hello Alex, a simple confirmation that your products are covered by your patents would satisfy a lot of your potential customers. Many members of this forum buy from Chinese resellers that operate outside EU/UK laws, so it is legitimate to ask you for reassurance.

Hello Alex, you worry me a little. If for example your company is sued for patent infringement and loses, the victor can ask me to deliver up all unsold products and list of all those who bought infringing products. I will have to refund my customers. It's important to know that your products...

Was there a relationship between aikema and tongsheng?