Replacement Pendleton Li ion battery

[John4of5]

Hi everyone, I bought an ebike for my wife about 3 years ago. It’s a Pendleton Somerby ebike from Halfords. Due to ill health the bike sat in our shed for a year and the battery died. It refused to charge at all and is as dead as a dodo.
please can anyone recommend a place I can buy a new battery pack?

 

[Nealh]

Pics please.

 

[Fat Rat]

Hi welcome to the site

 

[John4of5]

Pics please.

Hi Neal, here are two.

 

[cyclebuddy]

You need to look at the rear profile to determine which Joycube/Phylion rack battery it is: The two most common are 1) LEFT an SF-03 which IIRC uses the 5-pin SVD charge connector, and 2) RIGHT is a Wall-E which uses a barrel charge plug. My guess is it's an SF-03, but both often available via ebay (yosepower etc) with various/bigger capacities, and very commonly available in Europe/Scandinavia.

Neal will likely suggest opening the battery and measuring cell-string voltage and "bumping-up" any low-voltage cells which may recover the battery (if you're able/willing - it's the cheapest option).

 

[KirstinS]

You need to look at the rear profile to determine which Joycube/Phylion rack battery it is: The two most common are 1) LEFT an SF-03 which IIRC uses the 5-pin SVD charge connector, and 2) RIGHT is a Wall-E which uses a barrel charge plug. My guess is it's an SF-03, but both often available via ebay (yosepower etc) with various/bigger capacities, and very commonly available in Europe/Scandinavia.
View attachment 35162
Neal will likely suggest opening the battery and measuring cell-string voltage and "bumping-up" any low-voltage cells which may recover the battery (if you're able/willing - it's the cheapest option).

Bumping up cells.

This does depend on cells inside too. If 18650 then this may be possible but if its the older prismatic cells then no chance I'm afraid

 

[Nealh]

The other bit of info needed is does the battery actually give a SOC voltage reading from the discharge pins/connection ?

 

[shell]

Hi everyone, I'm in a similar position. Bike sitting unused for just over a year, battery refusing to charge. I was looking into 'bumping' the battery, but came across an article that said it could be dangerous to do with a li-ion battery that had been sitting with less than 1.5v for over a week. 15ish months is quite a lot longer than a week, so I figure it's too dangerous to try, am I right or should I try anyway? Other options are to try and replace the inner battery cells, pay someone else to do it (not a cheap option), or buy second hand. Not seen an awful lot of availability for the pendleton replacement batteries though, unfortunately. Can't find any new ones for sale at all.

Any help or advice would be greatly appreciated.

Should also say that, although I am willing to give replacing inner cells myself a go, I am not in the slightest bit experienced with electrics and batteries. so would be muddling through with YouTube videos for the most part.

 

[vfr400]

Hi everyone, I'm in a similar position. Bike sitting unused for just over a year, battery refusing to charge. I was looking into 'bumping' the battery, but came across an article that said it could be dangerous to do with a li-ion battery that had been sitting with less than 1.5v for over a week. 15ish months is quite a lot longer than a week, so I figure it's too dangerous to try, am I right or should I try anyway? Other options are to try and replace the inner battery cells, pay someone else to do it (not a cheap option), or buy second hand. Not seen an awful lot of availability for the pendleton replacement batteries though, unfortunately. Can't find any new ones for sale at all.

Any help or advice would be greatly appreciated.

Should also say that, although I am willing to give replacing inner cells myself a go, I am not in the slightest bit experienced with electrics and batteries. so would be muddling through with YouTube videos for the most part.

It's unlikely that the cells themselves will be that low. There's a management board inside that shuts down when any cell goes below 2.9v to protect them. It's always worth opening the battery and measuring them to see what's going on.

It could also be that the battery has entered some sort of sleep mode. How does the on'of switch normally work? Is it a two position switch or an on/off button?

 

[shell]

It's unlikely that the cells themselves will be that low. There's a management board inside that shuts down when any cell goes below 2.9v to protect them. It's always worth opening the battery and measuring them to see what's going on.

It could also be that the battery has entered some sort of sleep mode. How does the on'of switch normally work? Is it a two position switch or an on/off button?

Hello, thanks for taking the time to reply. It is an on/off button. Sounds like I should get the equipment to measure the voltage as it is and make a decision from there?

 

[vfr400]

Try holding the button for a long time to see if it wakes up.

 

[Nealh]

The BMS should prevent a cell form getting to low < 3v per cell group, though they are not a fail safe and sometimes a bleed resistor can sty open and a cell group may go lower. In most cases < 3v per group and the BMS will not allow any charging to take place as it has detected a fault.
In nearly all cases the battery needs opening and then individual cell group voltages need to be measured with a meter , either via the BMS sense wire connector or via the cell groups (the former is easier).

 

[PP100]

Could a battery expert take a look at this thread. I think de-electrifying a bike because a battery is seemingly dead, is a bit drastic.

Convert to manual bike?

Hi Hope someone can help please. I’ve got a Free Go folding ebike which has been in shed unused for a long time. Kept the battery and charger stuff inside house. Went to sort it all out and failed at first hurdle. Battery not charging. Battery and charger etc look perfect, dry, clean etc. Is...

www.pedelecs.co.uk

 

[shell]

The BMS should prevent a cell form getting to low < 3v per cell group, though they are not a fail safe and sometimes a bleed resistor can sty open and a cell group may go lower. In most cases < 3v per group and the BMS will not allow any charging to take place as it has detected a fault.
In nearly all cases the battery needs opening and then individual cell group voltages need to be measured with a meter , either via the BMS sense wire connector or via the cell groups (the former is easier).

Ok, yes that makes sense. I've spoken to my dad (former electrician and e- bike man himself) and have agreed to send my battery to him as he has the equipment to test voltage and his own battery to boost mine if he decides it's safe. Thank you for all of your advice, I have passed your wisdom on to him as well.

 

[shell]

Try holding the button for a long time to see if it wakes up.

Yes, I did try that a couple of times as it says that it has a reset function if you hold it down for 30seconds. Can't hurt to try again though, than you!