Battery Precautions

[detec52]

I love my converted yose mountain bike, I use it around twice a week, after each ride I take the battery off and store it in a sealed container it's no problem doing this but I'm not sure it will do the small controller pins any damage so far all seems good, am I going over the top? My bike lives in my workshop I have flammable liquids in there plus a motorbike so worry if the battery went pop so would my workshop, am I right in saying most battery's that go bang is when on charge.

 

[Nealh]

Batteries fail when charging when done inappropriately .
Usually means near a hot heated source.
Using an incorrect charging voltage or charging sequence.
Charging a faulty battery.

Most instances that tend to hit the news are diy fast food bodge up's, often one supsects they use fast charge for which the battery/BMS isn't capable of handling.
As well as a battery not capable of supplying enough current or on the current limit so will likely be under a lot more stress.

With inflammables stores /used one is wisely thinking of risk.

 

[Nealh]

Also to add we have not yet had a forum member come here to say they have ever had battery catch fire. I have been here 10 years others like Flecc have been here longer and not seen them mention anyone having said so.

 

[detec52]

Also to add we have not yet had a forum member come here to say they have ever had battery catch fire. I have been here 10 years others like Flecc have been here longer and not seen them mention anyone having siad so.

That's good to know

 

[saneagle]

From the stories I've heard, my judgement and a bit of postulation, batteries are catching fire mainly on delivery bikes and scooters for three reasons: Some social media posts show them how to get more power from the battery by bypassing the BMS; they buy fast chargers, which over-heat the batteries; bad installations with poorly routed wires, especially with the batteries in bags, where there is a lot of movement.

There's extremely low risk from a normal ebike battery treated in the way that the manufacturer intended and charged with the correct charger.

One thing you must get right if you regularly remove the battery for charging is to be absolutely sure that the battery is switched off when you put it back on the bike, otherwise you'll soon be looking for a new connectors to replace the burnt ones, which no longer connect. Also, if you have the common 5.5mm jack on the charger, make sure the charger is switched on before you connect in order to avoid the inrush current welding the jack to the socket, which can be disastrous when you try to remove it.

 

[thelarkbox]

Only Pops and bangs from my yose conversion/battery occur when I attach the battery Without turning off the battery switch , this can allow the control system to attempt a large current draw to charge up all the flat capacitors inside and if the initial connection is Shakey pops sparks and bangs can fly momentarily.

 

[Sparksandbangs]

Only Pops and bangs from my yose conversion/battery occur when I attach the battery Without turning off the battery switch , this can allow the control system to attempt a large current draw to charge up all the flat capacitors inside and if the initial connection is Shakey pops sparks and bangs can fly momentarily.

I'd like to assure everyone that I've never flown momentarily.

 

[guerney]

I'm cautiously using this precaution right now, because mine's a cheapish four year old Amazon marketplace sourced battery, albeit with genuine seeming LG MH1 cells of good function.

https://www.pedelecs.co.uk/forum/threads/battery-precautions.48787/

 

[AntonyC]

I love my converted yose mountain bike, I use it around twice a week, after each ride I take the battery off and store it in a sealed container it's no problem doing this but I'm not sure it will do the small controller pins any damage so far all seems good, am I going over the top? My bike lives in my workshop I have flammable liquids in there plus a motorbike so worry if the battery went pop so would my workshop, am I right in saying most battery's that go bang is when on charge.

There's more energy in a cup of petrol than a full battery so the risk is ignition rather than spread of fire, and if it does catch fire you can't contain the hot gasses. If you remove the battery it might be best done outside the shed and don't seal the container tight.

Yes the risk is extremely low from what we call normal batteries but let's hear all about your bike. To saneagle's list I'd add that if you use a battery-approved fast charger make sure the battery's warmed through beforehand, and I favour a battery that's generously sized for the controller current.