PINNED - Lithium battery conversion/info

[optical10]

Not yet but thats where my next ones are coming from. Be sure to mention this forum. They seem OK and have been around a while. Some users here used them.

okay thanks. Just hoping those who have used them give me some heads up on their experience though I'm sure they would have complained here if things had gone pear-shaped but just to be sure.....

On the import tariff commodity code for the VAT man anybody tied it down specifically, I've got this code, "8507600085", is that ringing any bells with others who have imported Li ion to the UK?

[shirley_hkg]

My maddest range: 83km/89.5 returned Ah.

In fact I was nearly unconscious in the last 4km A kind guy along the road gave me a 'red bull', it saved me. I should better prepare for long ranges, e.g some

You see the avg speed is 14.29kph. Its max speed must be greater than 15kph because I had to run at very low speed in some dangerous roads. That great speed was achieved just by increase motor voltage from stock 21.5V to max 25V.

https://drive.google.com/open?id=1zVOpR ... sp=sharing

The attachment 82km.jpg is no longer available

Tried the newly completed 65km cycling track in Hong Kong last weekend. 80km recorded with my wife behind wheels , and 102Ah recharged.

[optical10]

I just had my backup chair's battery box measured. My back-up chair is also a TDX-SP.
Unlike my primary chair, the backup chair has no elevation post so the battery space is unobstructed.
As measured, the open area available for batteries is:
9 5/8" wide x 15" deep x 9.75" high, or in metric:
244.475mm wide x 381mm deep x 246.65mm high

The attachment TDX SP LiFePO battery configuration back PNG.png is no longer available

@Joe, would you be so kind as to tell me what software is producing this image please?

[terry2]

What is the safest volts to go down to?

I am @ 3.2V at the moment.
Don't want to come to a stand still when I'm out and about.

[snaker]

3.100V is safe or 25.0V for the whole pack. Just my thought

[terry2]

3.100V is safe or 25.0V for the whole pack. Just my thought

Thank you

[shirley_hkg]

Every pack varies. Best to do a 2.9V discharge and then decide.

[optical10]

well it's that time I guess to go lithium now my gel's have given up the ghost with a best part of a year on the dumb charger before I got the Shirley have now taken their toll
having read through the entire post again I take it these are still the best choice for the conversion "Portable 3.2 Volt 200AH Lifepo4 Battery Cells Li-ion LFP Battery For Home Energy Storage"?
If so has anybody had experience from this particular supplier, what are their bolts thread craftwork, transaction professionalism etc?
Any thoughts or any alternatives much appreciated.

Here is the first quote:

For 4pcs 3.2v 200ah LiFePO4 Cells, USD115/pcs, sub total USD460
Shipping fee to door by train, USD125 including taxes and import duties
Delivery time: about 40days
Payment term: TT(wire transfer, added USD30) and PayPal(added 5% fee)
6000cycles-5Years Warranty-lifespan>20years-CE/IEC62133certificated.
As a lithium battery Manufacturer for over 16years, recognized by customers from Europe, Australia and North America,
I am confident our batteries to meet your full satisfactions!
How do you like our offer?
Thanks.
Best regards
Carl
Overseas Manager
RJ Energy(CRJ Technology Limited)
Mob: +86 13430203848
WhatsApp: +86 13430203848
Address: NO.16 RongHe Road Nanhai District Foshan China

I then got a discount for 8 plus one extra for backup making the second quote total of ,

Glad to hear those info!
Yes, we can give you discount for that!
For 9pcs 3.2v 200ah LiFePO4 Cells, USD105/pcs, sub total USD945
Shipping fee to door by train, USD185 including taxes and import duties
Delivery time: about 40days
It is door to door shipping, will deliver to your home address.
Thanks.

His reference to "glad to hear those info" is his acknowledgement that he's visited this forum with the URL links I referenced in my email so hopefuully some good comes from that.

I was able to squeeze eight cells into the salsa R2 by moving some of the R-Net modules to the exterior of the battery area with other quickie equipment covers from other models modules ,

what do you think BM on the quote and have I screwed anything up so far?

[optical10]

Cellpro (JST PA) PowerLab 36" Extension Cable in stock on the USA store, not in stock in the Singapore store.

[Burgerman]

Looks OK to me. Carl is a member here. He was rather spamming a lot so got a small telling off. But seems at least to be consistent! He gave me a similar quote.

I too think they should fit the Salsa, with a little adjustment here and their.

It makes buying 2x MKs at £440 plus delivery (at 35Ah usable) look rather expensive compared to lithium with a real 200Ah usable doesent it... Never mind the throwing away every 9 to 12 months.

Lithium is around double the price, for 6x MORE Ah. And about 7x GREATER service life. Lead made absolutely no sense for a decade now at least.

If you set off with them charged, you dont need worry about voltage monitoring as you or your missus will wear out first. When you see a light or two disapear from the salsas display, you will likely already have gone to bed no matter how far you go.

[optical10]

Looks OK to me. Carl is a member here. He was rather spamming a lot so got a small telling off. But seems at least to be consistent! He gave me a similar quote.

I too think they should fit the Salsa, with a little adjustment here and their.

It makes buying 2x MKs at £440 plus delivery (at 35Ah usable) look rather expensive compared to lithium with a real 200Ah usable doesent it... Never mind the throwing away every 9 to 12 months.

Lithium is around double the price, for 6x MORE Ah. And about 7x GREATER service life. Lead made absolutely no sense for a decade now at least.

If you set off with them charged, you dont need worry about voltage monitoring as you or your missus will wear out first. When you see a light or two disapear from the salsas display, you will likely already have gone to bed no matter how far you go.

BM as I was about to order and reminded Carl to have a word with the engineers who are drilling the bolt holes to take care et cetera and he's just sent me a reference images to laser welding some bolt into the terminal point, do I want this, is it better then our DIY Loctite solution?

Cheers

Here are the images he sent me:

[Burgerman]

No idea!

[terry2]

Every pack varies. Best to do a 2.9V discharge and then decide.

Thank you

[terry2]

Looks OK to me. Carl is a member here. He was rather spamming a lot so got a small telling off. But seems at least to be consistent! He gave me a similar quote.

I too think they should fit the Salsa, with a little adjustment here and their.

It makes buying 2x MKs at £440 plus delivery (at 35Ah usable) look rather expensive compared to lithium with a real 200Ah usable doesent it... Never mind the throwing away every 9 to 12 months.

Lithium is around double the price, for 6x MORE Ah. And about 7x GREATER service life. Lead made absolutely no sense for a decade now at least.

If you set off with them charged, you dont need worry about voltage monitoring as you or your missus will wear out first. When you see a light or two disapear from the salsas display, you will likely already have gone to bed no matter how far you go.

BM as I was about to order and reminded Carl to have a word with the engineers who are drilling the bolt holes to take care et cetera and he's just sent me a reference images to laser welding some bolt into the terminal point, do I want this, is it better then our DIY Loctite solution?

Cheers

Here are the images he sent me:

charge-cable-40A.jpg

laser terminal post bolts.jpg

Are those used cells?

New ones should have a Holo-marker.
The ones he sent me was used, but they are going ok.

Look at the video on this page to show you what I mean https://www.aliexpress.com/item/4000973 ... web201603_

[Burgerman]

By which he means do a full pack charge and balance. And then do a full pack DISCHARGE. at the end of the long discharge all the cells will drop like a rock at different times. Some packs, are very close together. So the TOTAL voltage will be lower before the lowest cell reaches say 3 volts.

If one cell has significantly lower capacity, it might drop below the safe limits long before the others. And so you may need to stop at a higher TOTAL ovrall voltage.

So you discharge it, and make notes! The total voltage you are looking for is above the point where the lowest cell drops to say 2.7 to 3V.

And then add a little for safety. And then NEVER go past that point. Or use a cell monitor. But if you fit a big enough pack you dont need to do any of this as you will die first...

[terry2]

Cellpro PowerLab 8 v2. has been put back again till the end of this month.

I call BS on why they haven't got any.

[terry2]

By which he means do a full pack charge and balance. And then do a full pack DISCHARGE. at the end of the long discharge all the cells will drop like a rock at different times. Some packs, are very close together. So the TOTAL voltage will be lower before the lowest cell reaches say 3 volts.

If one cell has significantly lower capacity, it might drop below the safe limits long before the others. And so you may need to stop at a higher TOTAL ovrall voltage.

So you discharge it, and make notes! The total voltage you are looking for is above the point where the lowest cell drops to say 2.7 to 3V.

And then add a little for safety. And then NEVER go past that point. Or use a cell monitor. But if you fit a big enough pack you dont need to do any of this as you will die first...

I'm going to do it by going out and about.

I am still at 3.2 to 3.18.
I will be doing it this way because I go between 4-8-11 mph..so a real world test
But thank for the info

[optical10]

Looks OK to me. Carl is a member here. He was rather spamming a lot so got a small telling off. But seems at least to be consistent! He gave me a similar quote.

I too think they should fit the Salsa, with a little adjustment here and their.

It makes buying 2x MKs at £440 plus delivery (at 35Ah usable) look rather expensive compared to lithium with a real 200Ah usable doesent it... Never mind the throwing away every 9 to 12 months.

Lithium is around double the price, for 6x MORE Ah. And about 7x GREATER service life. Lead made absolutely no sense for a decade now at least.

If you set off with them charged, you dont need worry about voltage monitoring as you or your missus will wear out first. When you see a light or two disapear from the salsas display, you will likely already have gone to bed no matter how far you go.

BM as I was about to order and reminded Carl to have a word with the engineers who are drilling the bolt holes to take care et cetera and he's just sent me a reference images to laser welding some bolt into the terminal point, do I want this, is it better then our DIY Loctite solution?

Cheers

Here are the images he sent me:

charge-cable-40A.jpg

laser terminal post bolts.jpg

Are those used cells?

New ones should have a Holo-marker.
The ones he sent me was used, but they are going ok.

Look at the video on this page to show you what I mean https://www.aliexpress.com/item/4000973 ... web201603_

okay Terry, I'll check with them and report back, just the info I needed thanks.

[optical10]

okay Terry, I'll check with them and report back, just the info I needed thanks.

Just got this reply back from Carl and it looks like they are new for this particular quote, it would be good if we could compare prices on your used supply from them if you don't mind? I know quotes are based on supply demand etc and it varies day-to-day but still.....

"Hi
The cells were produced on June, and in our stock now.
But they are brand new not used cells.
Thanks.
------------------
Best regards
Carl
Overseas Manager
RJ Energy(CRJ Technology Limited)
Mob: 0086 13430203848
Whatsapp: +86 13430203848
Address: NO.16 RongHe Road Nanhai District Foshan China"

Terry the link you sent me at Aliexpress was a good comparison as I didn't even have any other suppliers before for the same size cells however they have a 71 day delivery compared to 40 days from this firm RJ Energy even though they are both coming from China . Shame as I thought that they might have enough stock in Poland which would have been a seven day delivery and the USA is also unavailable from them :-(.

Also RJ Energy will not charge me extra to laser weld the bolts which I'm going to take a chance unless anybody had bad experiences laser welding stainless steel bolts to the terminal posts?

[terry2]

okay Terry, I'll check with them and report back, just the info I needed thanks.

Just got this reply back from Carl and it looks like they are new for this particular quote, it would be good if we could compare prices on your used supply from them if you don't mind? I know quotes are based on supply demand etc and it varies day-to-day but still.....

"Hi
The cells were produced on June, and in our stock now.
But they are brand new not used cells.
Thanks.
------------------
Best regards
Carl
Overseas Manager
RJ Energy(CRJ Technology Limited)
Mob: 0086 13430203848
Whatsapp: +86 13430203848
Address: NO.16 RongHe Road Nanhai District Foshan China"

Terry the link you sent me at Aliexpress was a good comparison as I didn't even have any other suppliers before for the same size cells however they have a 71 day delivery compared to 40 days from this firm RJ Energy even though they are both coming from China . Shame as I thought that they might have enough stock in Poland which would have been a seven day delivery and the USA is also unavailable from them :-(.

Also RJ Energy will not charge me extra to laser weld the bolts which I'm going to take a chance unless anybody had bad experiences laser welding stainless steel bolts to the terminal posts?

Thoose in the picture are used.

I has a foil mark on the other hasn't
The black paper you see on top can be bought and glued on.

As him for a close up picture and say that if they are not 100% you will send them back at his cost.
Show him the video of new cells..

I have just looked at the picture again. And they are used cells....tell him to do one.

I paid about £900 for 8 cells over 12 months ago.

[optical10]

okay Terry, I'll check with them and report back, just the info I needed thanks.

Just got this reply back from Carl and it looks like they are new for this particular quote, it would be good if we could compare prices on your used supply from them if you don't mind? I know quotes are based on supply demand etc and it varies day-to-day but still.....

"Hi
The cells were produced on June, and in our stock now.
But they are brand new not used cells.
Thanks.
------------------
Best regards
Carl
Overseas Manager
RJ Energy(CRJ Technology Limited)
Mob: 0086 13430203848
Whatsapp: +86 13430203848
Address: NO.16 RongHe Road Nanhai District Foshan China"

Terry the link you sent me at Aliexpress was a good comparison as I didn't even have any other suppliers before for the same size cells however they have a 71 day delivery compared to 40 days from this firm RJ Energy even though they are both coming from China . Shame as I thought that they might have enough stock in Poland which would have been a seven day delivery and the USA is also unavailable from them :-(.

Also RJ Energy will not charge me extra to laser weld the bolts which I'm going to take a chance unless anybody had bad experiences laser welding stainless steel bolts to the terminal posts?

Thoose in the picture are used.

I has a foil mark on the other hasn't
The black paper you see on top can be bought and glued on.

As him for a close up picture and say that if they are not 100% you will send them back at his cost.
Show him the video of new cells..

I have just looked at the picture again. And they are used cells....tell him to do one.

I paid about £900 for 8 cells over 12 months ago.

yup I see what you mean they are definitely used but I'm hoping he just used stock pictures and not actually the ones I will be buying but it doesn't hurt to to do my due diligence like you suggest.

[terry2]

They are not stock photos.

[optical10]

They are not stock photos.

This is a confirmation email and photo of the new cells they will be shipping. So thanks Terry I would have never known to check this if you hadn't given me the heads up, IOU one

Hi
Below is the picture of the 200ah cells without welded bolts:

RJ Energy China confirm new cells CROPPED.png (204.45 KiB) Viewed 15074 times

We guarantee that these cells are all brand new, not used. And offer 5 years warranty, will send you new replacement if it is our
manufacturer defect.

Thanks.
------------------
Best regards
Carl
Overseas Manager
RJ Energy(CRJ Technology Limited)
Mob: 0086 13430203848
Whatsapp: +86 13430203848
Address: NO.16 RongHe Road Nanhai District Foshan China

[terry2]

They are not stock photos.

This is a confirmation email and photo of the new cells they will be shipping. So thanks Terry I would have never known to check this if you hadn't given me the heads up, IOU one

Hi
Below is the picture of the 200ah cells without welded bolts:

RJ Energy China confirm new cells CROPPED.png

We guarantee that these cells are all brand new, not used. And offer 5 years warranty, will send you new replacement if it is our
manufacturer defect.

Thanks.
------------------
Best regards
Carl
Overseas Manager
RJ Energy(CRJ Technology Limited)
Mob: 0086 13430203848
Whatsapp: +86 13430203848
Address: NO.16 RongHe Road Nanhai District Foshan China

You picture is cropped a bit to much to see.
But I still see no hologram on the top.

The 2 people on here they sold them too.

Mine was used 200AH sold as 170 AH
The other guy has the cell swelling and had to get another sent over.

I had to buy a 6mm(3 part) tap set, as the thread did not go down enough.

Don't forget you can't buy any PL8 as yet.
So don't rush to get the cells.

[optical10]

They are not stock photos.

This is a confirmation email and photo of the new cells they will be shipping. So thanks Terry I would have never known to check this if you hadn't given me the heads up, IOU one

Hi
Below is the picture of the 200ah cells without welded bolts:

RJ Energy China confirm new cells CROPPED.png

We guarantee that these cells are all brand new, not used. And offer 5 years warranty, will send you new replacement if it is our
manufacturer defect.

Thanks.
------------------
Best regards
Carl
Overseas Manager
RJ Energy(CRJ Technology Limited)
Mob: 0086 13430203848
Whatsapp: +86 13430203848
Address: NO.16 RongHe Road Nanhai District Foshan China

You picture is cropped a bit to much to see.
But I still see no hologram on the top.

The 2 people on here they sold them too.

Mine was used 200AH sold as 170 AH
The other guy has the cell swelling and had to get another sent over.

I had to buy a 6mm(3 part) tap set, as the thread did not go down enough.

Don't forget you can't buy any PL8 as yet.
So don't rush to get the cells.

@Terry I've PM'd you to forward you a uncropped image.

How far down should the threads go then as they are laser welding the stainless steel bolts for me so I need to tell them please?

I got a PL8 already, spare on back order, Cellpro (JST PA) PowerLab 36" Extension Cable on the way.

[Burgerman]

You cant weld any aluminum alloy to stainless or non stainless steel. It looks like they are welding an alloy nut on top. Not good.

[daunjan]

Hey as anyone tried lifepo4 pouches to make a battery...
SPIM08HP 3.7v 8ah 200a LITHIUM ION W/ CELL HOLDER from batterhookup. Cant find any lifepo4 cells fit my TA IQ. The grp 24 70ah are flush inside their box 21cm high 25cm length 16cm width can only found from evwest 70ah at 30mm wide fit. But cost 4k ship here then customs. Most cells are 36mm wide

The SPIM08HP are cheaper 1k could build 4x 12v batteries, fitting 25s for 200ah each
https://batteryhookup.com/products/new-case-of-36-spim08hp-with-holders?variant=32737438498948

[LROBBINS]

It seems that those are not LiFePO4, but Li ion - hence flammable and potentially explosive.

[Burgerman]

And higher volts per cell, so you will need 7S rather than 8S and will be sitting on a firework.

[shirley_hkg]

You should only consider A123 pouch cells.