Search found 299 matches

by mushymelon
Dec 13 2018 11:59pm
Forum: Battery Technology
Topic: Tested my Panasonic cells (Opus), unsure of results
Replies: 8
Views: 519

Re: Tested my Panasonic cells (Opus), unsure of results

Capacity is spot on i would say. IR for the pf should be about 29 to 30, thats personal results on my gear using 4 wire test. If the IR of the cells are close thats what counts regardless of the testing method. I would balance them them to 3.7 ish V before testing Ir and warm them up to room temp. 1...
by mushymelon
Dec 13 2018 11:09pm
Forum: Battery Technology
Topic: Alternative to soldering - How is this done?
Replies: 4
Views: 427

Re: Alternative to soldering - How is this done?

Before soldering I like to punch a few holes in the strips. Simply use an awl to punch a small hole in your strips using some soft wood underneath, flip it over repeat on the back side flatten your strip out with a hammer or whatever tool. Now solder both sides and make sure it the solder sucks up t...
by mushymelon
Dec 02 2018 11:56pm
Forum: Items for Sale - Used
Topic: E-bike battery kit
Replies: 1
Views: 366

Re: E-bike battery kit

Was this a used pack that was stripped apart?
by mushymelon
Mar 21 2018 11:26pm
Forum: Items for Sale - Used
Topic: Free!
Replies: 11
Views: 1228

Re: Free!

Hi Brentis

I'll take the motor if its not smoked

Matt
by mushymelon
Jan 16 2018 6:06pm
Forum: Battery Technology
Topic: BOSS LEVEL CUSTOM SPOT WELDER
Replies: 438
Views: 43345

Re: BOSS LEVEL CUSTOM SPOT WELDER

The welds look ok but you may want to rethink your design. Using insulators on the positive cells is much safer. My main concern is the extra tab between the cell ends. This is not good and could cause a dead short if you melted the thin plastic wrap. Double up on the tabs if necessary, but don't we...
by mushymelon
Mar 23 2017 12:17pm
Forum: E-Bike Non-hub Motor Drives
Topic: Bafang BBS02 controller information
Replies: 6
Views: 831

Re: Bafang BBS02 controller information

I could do that
PM me your email address
I will try to get it done tomorrow

Matt
by mushymelon
Mar 23 2017 12:51am
Forum: E-Bike Non-hub Motor Drives
Topic: Bafang BBS02 controller information
Replies: 6
Views: 831

Re: Bafang BBS02 controller information

I have a pile of these things and few already unpotted.
Maybe I can hook you up if shipping is cheap enough.
by mushymelon
Mar 23 2017 12:37am
Forum: Battery Technology
Topic: Ultra Cheap 66160 30Ah LTO - Or Scam?
Replies: 42
Views: 7483

Re: Ultra Cheap 66160 30Ah LTO - Or Scam?

These batteries will be great if they last 30,000+ cycles i'm very interested in your results. Something to consider. A cheap and powerful load could be created with lots of air flow and a lot of short paralleled nichrome wires . Creating a load with nichrome wire is easy. You can tune it with lengt...
by mushymelon
Mar 21 2017 12:24am
Forum: Battery Technology
Topic: Mounting this Battery Box
Replies: 1
Views: 291

Re: Mounting this Battery Box

These boxes are usually flimsy plastic. Thin and brittle in the cold. They do the job when mounted to the floor of your boat. All they do is keep out the elements and keep your battery from moving around when strapped down thats it really. This box wont survive a fall. Look for something more rugged...
by mushymelon
Feb 15 2017 5:45pm
Forum: Battery Technology
Topic: Honda is using our member images without consent
Replies: 24
Views: 2236

Re: Honda is using our member images without consent

Ha

Sellout

Thats actually pretty sweet. I hope Gm uses some of my pics I could use a nice windfall.
by mushymelon
Feb 15 2017 5:34pm
Forum: Battery Technology
Topic: Spot welder doesn't work with 0.15mm pure nickel
Replies: 15
Views: 1932

Re: Spot welder doesn't work with 0.15mm pure nickel

All of these welders are under powered for the job. Some things you can try. Take out the welding tips and sharpen them up, the smaller the contact the hotter the weld. The copper used to weld with may be low quality and may need to be filed every few dozen welds. Try also reducing the pressure the ...
by mushymelon
Feb 03 2017 9:05am
Forum: Battery Technology
Topic: Help identify this battery
Replies: 10
Views: 957

Re: Help identify this battery

Its a ping 16s life pack. You can count the 16 channels on the bms. I had one open last week it's Identical in every way. Silicone on bms, balance plugs and the clear spiral wrap. Ping 15AH 16S 3P 48V lifep04 Balanced cells at 3.3 is good I would want to charge it up and see if it balances then hold...
by mushymelon
Dec 29 2016 12:38pm
Forum: E-Bike Build Threads / Photos & Video
Topic: My Luxury e-Cruiser
Replies: 28
Views: 2693

Re: My Luxury e-Cruiser

Wow thats some amazing composite work.

What type of composites is this made from.

Great work 8)

Matt
by mushymelon
Dec 24 2016 1:14pm
Forum: Items for Sale - New
Topic: CHEAP NEW ORIGINAL CELLS LI-ION 18650
Replies: 787
Views: 196684

Re: NEW CELLS 18650 SAMSUNG/SANYO/PANASONIC/LG 2900-3500mAh

My experience with Tumich. I'm located in Ontario. Great communication Cheap shipping and it took about 3 and a half weeks for 100 pf cells. I'm not gonna say $ because It was cheap really cheap, I think I got an early adopters rate. No duties were paid, they just delivered them to my door. They wer...
by mushymelon
Nov 03 2016 4:03pm
Forum: Battery Technology
Topic: BC168 18650 Charge Capacity Testing Question
Replies: 6
Views: 529

Re: BC168 18650 Charge Capacity Testing Question

Also these little suckers work, inexpensive too. Get the 4 wire holder for resistance testing. http://www.ebay.com/itm/DC-12V-Battery-Capacity-Tester-Battery-Life-Internal-Resistance-Analyzer-/171761180936?hash=item27fdc3a108:m:mTEy0WVq_pFiSjCxSzUdcFQ http://www.ebay.com/itm/-/171820708028 My setup ...
by mushymelon
Nov 03 2016 3:55pm
Forum: Battery Technology
Topic: BC168 18650 Charge Capacity Testing Question
Replies: 6
Views: 529

Re: BC168 18650 Charge Capacity Testing Question

It will tell you how much energy goes back into a cell. If you charge very slowly 0.5 amps it will get you within 5%.
Not the most practical for testing purposes, but It is a tool than can be used to compare cells.
by mushymelon
Aug 28 2016 2:39pm
Forum: Battery Technology
Topic: am i shafted with some fake steel nickel strips?
Replies: 10
Views: 952

Re: am i shafted with some fake steel nickel strips?

I believe those chart ratings need to be revised there is no mention of strip length.
Usually strips lengths between cells are pretty short I bet most packs can pull many times these ratings without heat issues.
Maybe Justin will perform some testing on this some day.
by mushymelon
Aug 22 2016 6:28pm
Forum: Battery Technology
Topic: 18650 pack got extremely hot - WTF?
Replies: 47
Views: 2661

Re: 18650 pack got extremely hot - WTF?

Capacity test won't show everything especially @ 1amp draw you should test them with at least 2.5 amp draw Pay close attention to the cells temperature. Unless your only going to pull 12 amps from your pack then your good. I have had cells with high internal resistance give equal or more capacity th...
by mushymelon
Aug 22 2016 5:40pm
Forum: Battery Technology
Topic: 18650 pack got extremely hot - WTF?
Replies: 47
Views: 2661

Re: 18650 pack got extremely hot - WTF?

You owned up to your mistakes I can respect that. I'm guessing you did your full capacity tests then built your pack with virtually no energy left in them because you should of had a plasma event when you dropped that bad connection on the cells. I'm guessing one parallel group being shorted would g...
by mushymelon
Feb 16 2016 3:09pm
Forum: E-Bike Non-hub Motor Drives
Topic: BBS02 fault
Replies: 3
Views: 415

Re: BBS02 fault

Sounds like the one way bearing inside the nylon gear is slipping.
by mushymelon
Feb 10 2016 5:49pm
Forum: E-Bike Non-hub Motor Drives
Topic: So I bought an Ego-Kit,the 3400W one. Worst Idea Ever. HELP!
Replies: 110
Views: 11673

Re: So I bought an Ego-Kit,the 3400W one. Worst Idea Ever. H

Trailsurfer wrote:tuu, as i live in that area i can go to ego personally.
lets sort it out.
Hello Trailsurfer

Have ego send tuu a new bms and 14 new cells to replace the damaged ones. And let them know we are watching!

2200 views and counting.
by mushymelon
Feb 08 2016 12:39pm
Forum: E-Bike Non-hub Motor Drives
Topic: Specialized Vita Elite Carbon + bbo2 750W
Replies: 8
Views: 1352

Re: Specialized Vita Elite Carbon + bbo2 750W

I don't think it will work, too much carbon frame around the bb for the bbs02 to slide in.
by mushymelon
Feb 01 2016 5:44pm
Forum: Items for Sale - New
Topic: JP spot welder
Replies: 1242
Views: 170978

Re: JP spot welder

Here's my set up for the fabulous JP Welder. :D I'm afraid recycled 18650 cells and a discarded wall wart from years ago are not worthy of such an incredible welder :lol: but it all works really well. I tried a few welds on leftover cells and this welder sure makes some beautiful, clean and strong ...