Search found 68 matches

by ichiban
Dec 11 2018 10:22am
Forum: E-Bike Build Threads / Photos & Video
Topic: 27.5 plus mid drive
Replies: 10
Views: 1076

Re: 27.5 plus mid drive

It is a nice and sturdy battery compartment build ! And what size is your EM3EV battery ? ...S...P ? Have not seen any motor you are using with your kit. Hub or mid-drive ? My 27.5 hardtail does not have a big triangle space like yours, so the 14s7p pack is needed to be squeezed into that tight spac...
by ichiban
Dec 11 2018 10:10am
Forum: Battery Technology
Topic: New 14S7P & 14S5P packs need advices (to climb high mountain)
Replies: 39
Views: 1288

Re: New 14S7P & 14S5P packs need advices (to climb high mountain)

The following activity is what I mentioned as "the big riding day". Estimated over half a million bikers joined the event, one of the largest, if not the largest, biking event in the world. Hopefully, it will be held annually. The main biking route pass near my house, so I joined in automatically. :...
by ichiban
Dec 08 2018 10:43am
Forum: Battery Technology
Topic: New 14S7P & 14S5P packs need advices (to climb high mountain)
Replies: 39
Views: 1288

Re: New 14S7P & 14S5P packs need advices (to climb high mountain)

My major frustration here is just I needed this charger badly to charge my new 14s5p pack I just finished assembling today for the big riding tomorrow. Lesson learned, I will always need spare charger. :warn:
by ichiban
Dec 08 2018 10:37am
Forum: Battery Technology
Topic: New 14S7P & 14S5P packs need advices (to climb high mountain)
Replies: 39
Views: 1288

Re: New 14S7P & 14S5P packs need advices (to climb high mountain)

My concern is whether these cheap $50-$60 chargers will last a good while - just like my late Luna
charger's 6-month life span and just died without any prevalent sign. Actually, I paid around $100.- + shipping for it.

May be I'll buy 2 units and use them alternately to extend their longevity.
by ichiban
Dec 08 2018 10:29am
Forum: Battery Technology
Topic: Large lead acid forklift battery self discharging
Replies: 20
Views: 569

Re: Large lead acid forklift battery self discharging

As regards the existing Battery. A shorted cell or two is probable. Shorts across the cell is not so likely since there is usually something like a fibreglass mat to keep the two parts of the cell apart. Plate material usually crumbles off of the plate due to miss use and gathers in the bottom of t...
by ichiban
Dec 08 2018 8:02am
Forum: Battery Technology
Topic: New 14S7P & 14S5P packs need advices (to climb high mountain)
Replies: 39
Views: 1288

Re: New 14S7P & 14S5P packs need advices (to climb high mountain)

I found some 14s 7A plain cheap chargers : https://www.aliexpress.com/store/product/58-8V-7A-Li-ion-Battery-Charger-Aluminum-Case-For-14S-51-8V-Lipo-LiMn2O4-LiCoO2/1728275_32888961073.html?spm=2114.12010612.8148356.66.6b6c7e935OmuzP and https://www.aliexpress.com/item/58-8V-4-5A-5A-5-5A-6A-6-5A-7A-7...
by ichiban
Dec 08 2018 7:47am
Forum: Battery Technology
Topic: Large lead acid forklift battery self discharging
Replies: 20
Views: 569

Re: Large lead acid forklift battery self discharging

You would need 100 2Ah or 60 3+Ah Cells in parallel to get the same capacity as the Forklift Lead Acid. But I doubt you really want to since the price of the Cells alone is in the 3000$ ballpark. You also need to know how much the Forklift drains, my guess would be around 250A cont. You could measu...
by ichiban
Dec 08 2018 6:00am
Forum: Battery Technology
Topic: New 14S7P & 14S5P packs need advices (to climb high mountain)
Replies: 39
Views: 1288

Re: New 14S7P & 14S5P packs need advices (to climb high mountain)

I have tested the 58.8V Luna charger with 2x24V halogen light bulbs in series. Still the charger acted the same, 1-sec ON / 1-min OFF. It 's the charger ! Just after 5-6 months of usage, it died on me. Any suggestion for a new 14S reliable charger(s) ? I put CA Satiator on top of the list (most $$) ...
by ichiban
Dec 08 2018 3:13am
Forum: Battery Technology
Topic: Large lead acid forklift battery self discharging
Replies: 20
Views: 569

Re: Large lead acid forklift battery self discharging

I just wonder what capacity of Li-Ion pack will be needed to replace the old lead-acid one. This is just plain question re battery capacity and just leave the counterbalancing weight out for a while. I know some are sensitive about that. :) For example, a regular 400Ah, 48V, 24-cell lead-acid batter...
by ichiban
Dec 08 2018 1:00am
Forum: Battery Technology
Topic: New 14S7P & 14S5P packs need advices (to climb high mountain)
Replies: 39
Views: 1288

Re: New 14S7P & 14S5P packs need advices (to climb high mountain)

Cell balance looks great. Not a bad idea to double check those voltages with a good DVM to verify accuracy. See how the voltages look after a full charge. Thanks fechter. That's a good idea to re-confirm with DVM. New problem is coming up... My regular Luna charger 58.8 volt is not working with thi...
by ichiban
Dec 07 2018 12:34pm
Forum: Battery Technology
Topic: E-Bike Battery Pack for Camping Power?
Replies: 5
Views: 214

Re: E-Bike Battery Pack for Camping Power?

My version of Batt Pack... Last week I made a pack (rather a power bank) for a group of monks who want some power source for lighting and phone to travel (on foot) deep into the jungle for over a month. The parts I ordered did not show up until the evening of the last day - I have hours to finish it...
by ichiban
Dec 07 2018 12:12pm
Forum: Battery Technology
Topic: New 14S7P & 14S5P packs need advices (to climb high mountain)
Replies: 39
Views: 1288

Re: New 14S7P & 14S5P packs need advices (to climb high mountain)

Update : I've roughly finished the 14s5p pack a while ago after long struggling with it for weeks. Waiting for parts, doing it in spare time and etc. The pack assembly detail will be explained later in a few days when I have more time. I will now conclude the BT BMS part that I use and bought from :...
by ichiban
Dec 02 2018 9:33pm
Forum: Resources & EV Related Parts and Services
Topic: Common high current connectors - and my opinion on them
Replies: 57
Views: 26653

Re: Common high current connectors - and my opinion on them

Still a big WoW @ 150A !!

Considering a small plastic connectors that size.

So we can jump start a car with the palm size Lipo @ these tiny connectors.
by ichiban
Dec 02 2018 9:28pm
Forum: Battery Technology
Topic: New 14S7P & 14S5P packs need advices (to climb high mountain)
Replies: 39
Views: 1288

Re: New 14S7P & 14S5P packs need advices (to climb high mountain)

I like the idea of the added buss bars. As I hadthat idea also. Do know of the real benefits ? But I believe. As we realized, the serial buses will carry the entire pack current up to the highest capacity amperage. So I decided to add more nickels since I still cannot spot-weld copper. For this 14s...
by ichiban
Dec 02 2018 12:07pm
Forum: Resources & EV Related Parts and Services
Topic: Common high current connectors - and my opinion on them
Replies: 57
Views: 26653

Re: Common high current connectors - and my opinion on them

Just came across this :

OSE 8.0mm ANTI-SPARK CONNECTORS 200 AMP PLUS

https://www.youtube.com/watch?v=zwYjXTx ... e=youtu.be

I have not verified anything yet regarding the accuracy of the info from above clip. But it sounds crazy @ 200Amp + already.
by ichiban
Dec 02 2018 10:29am
Forum: Battery Technology
Topic: New 14S7P & 14S5P packs need advices (to climb high mountain)
Replies: 39
Views: 1288

Re: New 14S7P & 14S5P packs need advices (to climb high mountain)

999zip999 wrote:
Nov 25 2018 10:32pm
Do you use gaskets on pos. end
Yes, I do. They are the white donut rings on each + terminal.

Sorry for the late reply, I cannot login for some reasons for several days but it is ok now.

63353B.jpg
by ichiban
Nov 18 2018 11:27am
Forum: Battery Technology
Topic: New 14S7P & 14S5P packs need advices (to climb high mountain)
Replies: 39
Views: 1288

Re: New 14S7P & 14S5P packs need advices (to climb high mountain)

Here is what I tried to explain...

60286B.jpg

The 1st nickel circled in red, I just soldered it to see & compare with spot weld.


and my babies are still waiting... :) avg @ 46.6g each at birth.

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by ichiban
Nov 18 2018 11:19am
Forum: Battery Technology
Topic: Large lead acid forklift battery self discharging
Replies: 20
Views: 569

Re: Large lead acid forklift battery self discharging

I debated recently with a friend re this forklift batts. He said that it is needed to be heavy to counter-balance with the front weight to lift so not to tip over. I said that it is true and absolutely perfect by the time when they designed this forklifts 80 years ago. And physics still works the s...
by ichiban
Nov 18 2018 2:04am
Forum: Battery Technology
Topic: Large lead acid forklift battery self discharging
Replies: 20
Views: 569

Re: Large lead acid forklift battery self discharging

Some opinion... I debated recently with a friend re this forklift batts. He said that it is needed to be heavy to counter-balance with the front weight to lift so not to tip over. I said that it is true and absolutely perfect by the time when they designed this forklifts 80 years ago. But for now, c...
by ichiban
Nov 18 2018 12:31am
Forum: Battery Technology
Topic: New 14S7P & 14S5P packs need advices (to climb high mountain)
Replies: 39
Views: 1288

Re: New 14S7P & 14S5P packs need advices (to climb high mountain)

Now back to my triangle 14s7p pack. Just plan ahead. Slide1.PNG Slide2.PNG The 0.3mm pure nickel patches layout I did look OK ? Try to make them big and wide with as little bottlenecks as possible. I agreed with spinningmagnets on termination points that should be able to allow current flow easily a...
by ichiban
Nov 18 2018 12:05am
Forum: Battery Technology
Topic: New 14S7P & 14S5P packs need advices (to climb high mountain)
Replies: 39
Views: 1288

Re: New 14S7P & 14S5P packs need advices (to climb high mountain)

Thanks guys. It is just I have fun with this. Re the electrical reinforcing of nickel strips, it is just the way we call it. So, like I mentioned somewhere in ES, better put pictures to explain than text. The orange doodled lines are what to add extra layers BEFORE actually weld the nickel strips on...
by ichiban
Nov 17 2018 1:15pm
Forum: Battery Technology
Topic: New 14S7P & 14S5P packs need advices (to climb high mountain)
Replies: 39
Views: 1288

Re: New 14S7P pack need advices (to climb high mountain)

My 14S5P pack will look very similar to this...

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by ichiban
Nov 17 2018 1:09pm
Forum: Battery Technology
Topic: New 14S7P & 14S5P packs need advices (to climb high mountain)
Replies: 39
Views: 1288

Re: New 14S7P pack need advices (to climb high mountain)

Also that nickel strips questions : To do next : I will be welding 14s5p of LG MJ1 (3.4Ah each, 10A max) in a tube aluminium box, to be mounted under downtube first. The cell holders and nickel (only 0.15mm thick, zig-zag shapes) are from Aliexpress. They are too thin for the job - optimistically gi...
by ichiban
Nov 17 2018 12:16pm
Forum: Battery Technology
Topic: New 14S7P & 14S5P packs need advices (to climb high mountain)
Replies: 39
Views: 1288

Re: New 14S7P pack need advices (to climb high mountain)

Thanks, Spinningmagnets. I have been using BBSHD for almost 1500km till now. It's a stock unit with 30-A controller. I have not done anything with it except greasing the internal parts with Mobilgrease 28 at the beginning. Interested in the 50-amp mod too but looks like it is a bit cumbersome (to me...
by ichiban
Nov 17 2018 12:04am
Forum: Battery Technology
Topic: New 14S7P & 14S5P packs need advices (to climb high mountain)
Replies: 39
Views: 1288

Re: New 14S7P pack need advices (to climb high mountain)

Some pics... my 1st working prototype welder...

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