Recent content by mjcrow

When you say you need to use a 6mm chain, do you mean #25 or 04C chain which has a 6mm height? If so, then do a search for 04C gears with a 6mm bore, there should be plenty on ailexpress or ebay. Chain and sprocket ES sticky here https://endless-sphere.com/forums/viewtopic.php?t=46630

Nice online calculator here https://electricscooterparts.com/motorwheelgearratio.html for top speed and gear ratios. I get my motor gears from aliexpress, lots of choice just make sure you get the shaft diameter and chain size right when ordering.

There is a post by fechter back in 2008 https://endless-sphere.com/forums/viewtopic.php?f=16&t=1312#p70490 in the battery technology forum that might explain what happened, hopefully your cells are ok but the bms modules in each pack may be toast.

I can't see any pics.

Hi janetang, The free shipping will be internally in China only, so if you deal with a Taobao agent, it may be shipped to them at no charge, but then you will have to pay shipping to you + agent commission + insurance + customs + take a big risk that you will get something you can use. Mike

Have you tried http://www.taobaotrends.com these were the only ones I found who would ship batteries (they even sent me pics of the batteries before they shipped them to me). They were pretty good to deal with, the guy I communicated with was Colin (probably not his real name :wink: ) they have...

I found this taobao site selling a few different configurations I hadn't seen before, as well as the ones we've been seeing at victpower. Some of the pictures show the batteries pretty banged up. Interesting picture here (note the reject stickers) 3S2P US$59.40...

I am not sure but it is probably dependent on whether the seller has the items in stock or is drop shipping, if they have the items in stock, then as far as they know they are selling to another Chinese person, so probably in their best interest to ship something that works, of course there are...

Don't trust the englishtaobao site for price, if you look at the sellers actual Taobao sitehttp://item.taobao.com/item.htm?id=14898273535 you will see the price is 4220.00yuan (US$662.98) then you would have shipping to the agent, then shipping and insurance to you. As to checking voltage etc...

Just like ebay, they have a feedback system, check how many sales they have, and you can read peoples comments if you paste them into google translate http://translate.google.com.au/?hl=en&tab=wT#zh-CN|en| (which works best if you copy and paste the text rather than translating the whole page)...

If you want to buy from Taobao you need to use an agent, there are plenty out there, they usually charge around 8% of cost +shipping+insurance. The item is shipped to the agent (located in China) who then checks the item, repackages it if required and forwards it on to you. I bought my A123s...

This is an interesting Taobao sale, the units look like they are put together but no bus bars welded yet http://www.englishtaobao.com/product/14829449243/%3Cspan+class%3DH%3EA%3C+span%3E+%3CSpan+class%3DH%3E123+%3C+span%3E+3.3v20%3Cspan+class%3DH%3Ea+lithium+iron+phosphate+battery+%3C+span%3E+h

Hi Sutho, The PL6 will do 1-6s balanced, and 1-8s unbalanced. The PL8 will do 1-8s balanced and 1-10s unbalanced. If you were a bit closer to me I'd happily lend you my PL8, maybe someone on the Eastern seaboard could help you out. PS. Very cool project, good to see an Aussie pushing the...

OK john, what BMS are you talking about, and what batteries are you using? How low are the temperatures and how long will they be stored for?

Hi johnc46, do you mean integrating the BMS in your pack or interrogating the BMS in your pack, because the latter involves shining a bright light in its face and sleep deprivation!