Search found 8988 matches

by 999zip999
Feb 14 2020 2:22pm
Forum: Battery Technology
Topic: 7s15p or 3*7s5p to quickly charge?
Replies: 22
Views: 546

Re: 7s15p or 3*7s5p to quickly charge?

There are used leaf modules in the used for sale section. It's worth a look. I have not use them. Oh just saw your are in New Zealand
by 999zip999
Feb 13 2020 5:20pm
Forum: Battery Technology
Topic: 7s15p or 3*7s5p to quickly charge?
Replies: 22
Views: 546

Re: 7s15p or 3*7s5p to quickly charge?

Have you purchased the cells yet ? You could use used auto grade leaf modules 4:45 amp your hours or another automotive grade patent cans terminals are there easy peasy do you know how many connections that are on a 7s 15p pack ? Lots. Over 200.
by 999zip999
Feb 12 2020 11:47am
Forum: Battery Technology
Topic: impressed with thunder 1220 300W 12S charger
Replies: 23
Views: 3673

Re: impressed with thunder 1220 300W 12S charger

My bad I thought that was a 1s3p mini pack. You want to charge a cell phone battery with your 1220 ?
by 999zip999
Feb 12 2020 11:32am
Forum: Battery Technology
Topic: 7s15p or 3*7s5p to quickly charge?
Replies: 22
Views: 546

Re: 7s15p or 3*7s5p to quickly charge?

I break my 24s pack as two 12s for faster charging. No BMS. With BMS most BMS charge at 5 to 6 amps max. So all can be on one power strip at one time. What is the amp draw on your motor ? With a BMS I like on big pack. I would run one big 15p pack and charge at 10 to 12 amps no BMS only because it's...
by 999zip999
Feb 10 2020 12:18pm
Forum: Battery Technology
Topic: impressed with thunder 1220 300W 12S charger
Replies: 23
Views: 3673

Re: impressed with thunder 1220 300W 12S charger

So 3p1s.. ? You could make 6p times ? Series. What these for ? How old is your 1220 ?
by 999zip999
Feb 10 2020 11:20am
Forum: E-Bike Technical
Topic: Looking for Controller Recommendation
Replies: 9
Views: 376

Re: Looking for Controller Recommendation

Luna cycle. What C.A. do you have ? Let's just get this is a direct connect does it have a 6-pin plug 30 ft but you do not as there are many models.
by 999zip999
Feb 10 2020 1:32am
Forum: Battery Technology
Topic: Battery packs?
Replies: 4
Views: 270

Re: Another newbie.

Em3ev makes custom batteries. Do email and get a stronger battery then you think you need. Saying so 60ah is big. What motor and what controller and how many amps ?
by 999zip999
Feb 09 2020 2:32pm
Forum: Battery Technology
Topic: BMS not charging or discharging
Replies: 40
Views: 939

Re: BMS not charging or discharging

:roll: I would put some extra sense wires on for a cellog for ez monitoring or a Bluetooth BMS would be cleaner. Write down each parallel group like. 1. 4.15 2. 3.95v 3. 3.85v 13. XXX volt this is state of charge. The important part. Charge voltage Battery voltage Yes all please give us these info p...
by 999zip999
Feb 09 2020 2:24pm
Forum: Battery Technology
Topic: impressed with thunder 1220 300W 12S charger
Replies: 23
Views: 3673

Re: impressed with thunder 1220 300W 12S charger

Both of mine cycle and start booting up them goes blank it seems like it has trouble communicating through its own self. 13.5 sounds fine what size is your pack ?
by 999zip999
Feb 07 2020 11:37am
Forum: Battery Technology
Topic: impressed with thunder 1220 300W 12S charger
Replies: 23
Views: 3673

Re: impressed with thunder 1220 300W 12S charger

I own two that almost boot up and had one replaced. So 3 no work. Plus I don't think they sale them anymore.
by 999zip999
Feb 06 2020 1:56pm
Forum: Battery Technology
Topic: used Samsung batteries
Replies: 5
Views: 269

Re: used Samsung batteries

How are the packs going to match his needs for solar storage.
by 999zip999
Feb 06 2020 12:15pm
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1676
Views: 484746

Re: Homemade Battery Packs

Sorry for the lost. I had a fire in my garage on the first floor I live on the third. Got down looked across the street and my roommate was there talking to neighbors. He forgot about me. Then the looters how do you say looters as they come in waves and see if fire and if they think they should just...
by 999zip999
Feb 06 2020 5:55am
Forum: Battery Technology
Topic: used Samsung batteries
Replies: 5
Views: 269

Re: used Samsung batteries

? So 12 batteries of 16s packs in 4 groups of 3 . Each 16s having it's own BMS ? 4.2v x 16 = 67.2v fully charged.
by 999zip999
Feb 06 2020 5:09am
Forum: Battery Technology
Topic: Adding one battery in parallel to 5 serial connected battery pack
Replies: 15
Views: 394

Re: Adding one battery in parallel to 5 serial connected battery pack

The battery may take 14.1 v but it is surface charge. With no real capacity at that voltage. You get them to high and they will get more than a little warm.with no good results
by 999zip999
Feb 05 2020 9:38pm
Forum: Battery Technology
Topic: Adding one battery in parallel to 5 serial connected battery pack
Replies: 15
Views: 394

Re: Adding one battery in parallel to 5 serial connected battery pack

Correct charge each battery to 13.6 volts if 13.8 volts well okay no more 13.6v is best let it sit or just parallel all the batteries all positive no one ever playing all natives if at same voltage that means if each 12 volt battery is the same voltage. well I don't know what their voltages are but ...
by 999zip999
Feb 05 2020 11:33am
Forum: Battery Technology
Topic: Adding one battery in parallel to 5 serial connected battery pack
Replies: 15
Views: 394

Re: Adding one battery in parallel to 5 serial connected battery pack

Is best to keep at 12.6v or above. That's why they have RV float chargers. I mean they don't like to set after ride at low voltage. Charge them as soon as they cool off. Don't charge hot batteries for longer age. 13.6 volt is fine. What you drew it up is wrong you want a series another battery for 6...
by 999zip999
Feb 04 2020 4:13pm
Forum: Battery Technology
Topic: Over-discharging lithium ion cells and the effects
Replies: 13
Views: 592

Re: Over-discharging lithium ion cells and the effects

Depending on the cells. My A123 20ah cells have been used a couple times to zero. Yes drain. And came back with or no negative affect. 1,490 cycles. 6.5years still going strong. I still get 17
5ah bit I work up hill down hill.
by 999zip999
Feb 04 2020 1:06pm
Forum: Battery Technology
Topic: Lifepo4 prismatic cut off voltage question
Replies: 13
Views: 364

Re: Lifepo4 prismatic cut off voltage question

Agree that he needs the right charger for his battery 58.6 or 59 volt 60 volt. Cc CV charger 16s. I like a kingpan metal case 5,amp charger from Ping or ?
by 999zip999
Feb 04 2020 11:14am
Forum: Battery Technology
Topic: Lifepo4 prismatic cut off voltage question
Replies: 13
Views: 364

Re: Lifepo4 prismatic cut off voltage question

Old wives tale. What you do need to do is leave it on the charger for many many hours after the light is turning green because bmsb down the high cell which will return on your charger to fill up the rest of the path but it takes a long time over and over again.
by 999zip999
Feb 03 2020 11:41pm
Forum: Battery Technology
Topic: Lifepo4 prismatic cut off voltage question
Replies: 13
Views: 364

Re: Lifepo4 prismatic cut off voltage question

Lifepo4 can take 3,6 to 3.7v but stopping at 3,5v is best as there is very little capacity above 3,5v . Your BMS may need a higher voltage to charge and balance. Plus how hard do you use your battery. You may be using it to hard making it unbalance. Maybe ? Quality matters. Link to battery please. 2...
by 999zip999
Feb 03 2020 10:54pm
Forum: Battery Technology
Topic: Boat battery egine starter
Replies: 15
Views: 559

Re: Boat battery egine starter

Wow !
by 999zip999
Feb 01 2020 4:50pm
Forum: Battery Technology
Topic: Paralleling uneven voltage cells?
Replies: 43
Views: 1254

Re: Paralleling uneven voltage cells?

I like for the final connection is a magnet with a piece of 24 gauge or 20 gauge wire little four strand wire in the hit him with the magnet and see what happens see how long it takes a burn that wire. Yes connecting outside in a safe place not on the kitchen table
by 999zip999
Feb 01 2020 11:24am
Forum: E-Bike Technical
Topic: Battery pack made from several small modem packs.
Replies: 32
Views: 1048

Re: Battery pack made from several small modem packs.

You may get more best response if this was in the battery section. Plus look up DrAngle here on E.S. lots of info. Do you have a spot welder ?
by 999zip999
Feb 01 2020 11:15am
Forum: Battery Technology
Topic: Is it risky to go over a BMS max Amps limit?
Replies: 13
Views: 458

Re: Is it risky to go over a BMS max Amps limit?

Yes ask em3ev let us know. Some are 60amps continuous 100amp peak and some are rated 100amps 150amps bursts.
Plus how much was the pack ? What cells and what shape ?
by 999zip999
Feb 01 2020 10:53am
Forum: Battery Technology
Topic: Paralleling uneven voltage cells?
Replies: 43
Views: 1254

Re: Paralleling uneven voltage cells?

I would have a clay pot the one without the hold in the bottom thing it . Just throwin that clay pot if they start to smoke. Always have a backup plan. I have taken the cover off used tool packs before just to see them start to smoke.