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Whether it 'unsettling' to me would depend on the ratio of purchased eBikes versus Conversion kits that are in actual use. Anyone know ?

I assume we would all like to see more information on 'battery' fires, but for that to happen them in power would need to change the reporting rules (IRS) that the Fire Brigades use, as reported in an earlier thread...

Maybe very little of the 'VAT' we are charged ends up in UK coffers; https://www.bbc.co.uk/news/uk-wales-65205520

I do wonder how much of the VAT that sites such as Aliexpress charge ends up in UK tax coffers. Maybe that companies in the far East that can maybe increase their prices by 20% is yet another of the many benefits of Brexit.

Next: Building the bag The back of the bag consisted of a thick nylon fabric outer, a stiff-ish PVC liner plate, a thin layer of white polythene foam and a very thin nylon fabric liner on the inside. I used the aluminium plate to make the positions of the needed mount holes in the back of the...

Not so unusual in the sensor world. The BUS line appears to be used for temperature sensing and eleswhere those are often read with a 1 wire protocol, such as that used by the DS18B20 temperature sensors etc.

Glad to hear it. The advantage of that cheap load tester, is that its easy for an ebike owner to carry out thier own load tests so they can decide for themselves how much capacity they loose with thier setup if they chose to charge to 41V only.

An amusing story of course, but I suspect the email has already gone out to police officers to avoid going near Waitrose in uniform. If an officer were to turn up for free coffee, what 'payment' would Sainsburys, Tesco etc offer in competition ?

Well before going into the detail of the intial wakeup, it really needs to be shown if the BUS data is bidirectional or not.

I have checked a couple of batteries using the fan driven load. The tests are specifically designed to represent real world practice, the battery is charged to 42V and the capacity measured down to 32V at a load of 2A. Then the battery is charged to 41V using a diode combination in series with...

Not checked, but whether it is or is not I doubt is significant. For an eBike situation the key would be decoding the stream of data sent approximatly every 5 seconds, which is much longer than the intial wake up block.

If you leave the resistor pullup in place, then only one block of data is sent. Remove the pull up and then put it back and another block of data is sent. Hence the battery does appear to be waiting for a response from the charger before it keeps sending what appears to be the temperature data.

Seagull food.

Can you confirm what the fault actually is ?

I have found, by experiment, that if the BUS line on the battery is connected to +5V via a high value resistor, 27K in this case, the battery wakes up and sends 4 blocks of data, which might be bytes. But that is all it sends, so it looks likley that the battery is waiting for a response from...

If you can work out what the data format is and read it with a suitable small micro, then you ought to be able to sense a high temperature condition and use a transistor to trigger one of the brake sensors. Ideally you would want to turn off the display\controller, but that might be a...

I have been able to get hold of one of the older Bosch chargers and I can take it to bits if I want. The first obvious bit is that the central blade is one sided on the charger, see the picture below; So when the battery is inserted the internals of the charger are connected to the BUS line...

Another way of detecting an overheating battery ! Slap the raw salmon on top of the battery and if it starts cooking you need to decide whether its time to eat or to run.

If there was a charging regime that could considerably extend the life of a battery it would be no surprise if manufactures such as Bosch, Shimano, Yamaha, Pansonic, Bafang etc. would not want to encourage it, they make money selling batteries after all. In addition whilst the manufacturers...

True but then the Boris saga is a classic case on them that getting elected decieving the people who elect them.