where to find cheap and good 36v 20ah battery pack???

[adli3381]

I am looking for a new battery for my electric bike 36v 600w motor. I current have SLA battery, but they are too big and heavy and only last around 12 mil. I am looking for those light weight battery pack: LiPo, LiFe, NiMH Battery > Li-Poly, Wonder how much they will cost?

I am new to electric bike, so if you can give me more detail it will be great appreciate. Thanks~

-Derek

 

[Tommy L]

I am looking for a new battery for my electric bike 36v 600w motor. I current have SLA battery, but they are too big and heavy and only last around 12 mil. I am looking for those light weight battery pack: LiPo, LiFe, NiMH Battery > Li-Poly, Wonder how much they will cost?

I am new to electric bike, so if you can give me more detail it will be great appreciate. Thanks~

-Derek

Hey Derek........
Update your profile and ad where you live. This is helpful when people answer you.

What chemistry are you looking for?

Tommy L sends.... \\m//

 

[adli3381]

Thanks, just update my location, I live in California, USA.

I am pretty new, and not a engineer, just want to set up a electric bike for my gf, so we can ride together, and maybe be my commute if it works well. Any type of battery that will fit my Wildness 36v motor will be great. Wishing if it can be done around $300.

-Derek

 

[Tommy L]

Thanks, just update my location, I live in California, USA.

I am pretty new, and not a engineer, just want to set up a electric bike for my gf, so we can ride together, and maybe be my commute if it works well. Any type of battery that will fit my Wildness 36v motor will be great. Wishing if it can be done around $300.

-Derek

There are many question to ask.....

What is your terrain like? hills, flats, steep grades .... mixed.....
How far is your commute?
How far would you like to go?

Some general rules with lithium cells/batteries is that you should never discharge them fully. This give the pack the best chance of survival.
You should learn what the word "Watt Hours" mean
Also, keep your discharges to about 80% max out of the 100% available. (this is called DOD "depth of discharge")

The 2 main/popular types of batteries/cells are: LiCo and LifePO4. The first is RC type batteries... very light and powerful, but you must learn
about them to be safe. The second, LiFePO4 can be more forgiving/safer.

If you are not interested in learning about batteries/cells, then a place like www.Headway-Headquarters.com has some packs with BMS (battery Management systems).
Others would be
http://www.emissions-free.com/

I even sell the LiFePO4 in packs at:
www.rawvelocity.com
but mine do not use at BMS and the user should know how far to discharge the packs (80%) DOD.

I'm sure by now...... others will share here with you.
Read Read Read.......Learn Learn Learn = Happy Happy Happy!

Peace!

Tommy L sends.... \\m//

 

[adli3381]

HI Tommy,

Thanks for the info, yea i been reading a lot on the forum and learning little by little, picking up slow since i am not a engineer background, but do enjoy every part of it, that's why i want to upgrade my current to the never level =D

I just don't want to spend like $300 or $500 and it end up it doesn't work with my bike....

so far i have found 2 battery pack
one: http://elitepowersolutions.com/products/index.php?cPath=25
i can buy 3 packs, and connect them together then solid with my plug head, which cost about $124x3=$372

And i also see something coo, but not sure how this works
http://www.hobbyking.com/hobbyking/store/__15521__Turnigy_5000mAh_4S1P_14_8v_20C_hardcase_pack.html
wondering if anyone can help me understand how many pack of those do i need to make it compatible to my 36v 600w motor, and what kind of tool and works i need to do with after i buy the packs. Thanks~

-Derek

 

[john7700]

Ping's the Thing

http://www.pingbattery.com/servlet/StoreFront

But, it's going to cost you more than you would like. That's the price of poker. He seems to be the preferred
LiFePO dealer around here (I run one) and he will stand behind his packs. Note that his packs are 2C rated cells
unlike the higher discharge A123 that were posted earlier.You should be able to go with a 15 Ah pack which will
save you some $.

It might matter as to where you are mounting the battery as well.

With no previous experience and given that it's a girlfriend bike, you want to stay away from RC LiPo

 

[Tommy L]

HI Tommy,

Thanks for the info, yea i been reading a lot on the forum and learning little by little, picking up slow since i am not a engineer background, but do enjoy every part of it, that's why i want to upgrade my current to the never level =D

I just don't want to spend like $300 or $500 and it end up it doesn't work with my bike....

so far i have found 2 battery pack
one: http://elitepowersolutions.com/products/index.php?cPath=25
i can buy 3 packs, and connect them together then solid with my plug head, which cost about $124x3=$372

And i also see something coo, but not sure how this works
http://www.hobbyking.com/hobbyking/store/__15521__Turnigy_5000mAh_4S1P_14_8v_20C_hardcase_pack.html
wondering if anyone can help me understand how many pack of those do i need to make it compatible to my 36v 600w motor, and what kind of tool and works i need to do with after i buy the packs. Thanks~

-Derek

Hey Derek.....

It's not so much your motor. Sure.... It's rating is 36v/600watts. This is what the motor should be able to do all day and all night. 100% duty cycle.
It your Controller.....so I'm thinking it's a 36v controller at 10-20amps (360w to 720watts)

The GBS LiFePO4 would work and you'd have 20a/h pack.... which would be about 720watt hours. If your consumption was 25 watt hours per mile,
at 80% use you could possibly travel 23 miles.

This Hobby King pack is LiCo (learn Learn Learn!!!!)
this pack if put in series (3x voltage) and the amp hours are the same at 5ah (or 5,000mah) your pack would be 180 watt hours. If your consumption was 25
watt hours per mile.....at 80% use you could possibly travel 5 miles.

You would have to purchase 12 Hobby kings pack to go as far as the GBS Pack.

Here is how I figured the GBS Pack:
Volts X Amp hours = watt hours
36v x 20amp/h = 720 watt hours x 80% = 576 usable watt hours to be safe

This is why most of us here use a Cycle Analyst (CA for short). It will tell you your consumption in watt hours. It's a great unit and gives you info like:
Total pack Voltage
Amp Hours
Watt Hours
Speed
Watts currently be used

This way you can ensure that your INVESTMENT....THE BATTERIES, are never over drained

Tommy L sends... \\m//

 

[adli3381]

thanks for all the tip, yea i do need to learn that Lico, it feels like its the cheapest way to get battery pack. Is there a place show to to put them together?

btw, this is what i have right now:http://www.bernsonev.com/Complete_Wilderness_Bike_Conversion_Kit_p/965634.htm

It says there is a controller, but didn't mention what type, and it say it go up to 30mil, but that will require a lot of peddling, i usually do around 12 to 15mil full charge. the package is good, just the battery is huge and heavy, so i want to upgrade to make it lighter and go faster. I usually ride in flat, maybe just a little uphill which i peddle alone, but normally i just use the motor since its going 22mph without peddle, and even i peddle hard it only go up to 26mph, which is very fast for me/gf already =)

-Derek

 

[PetersReviews]

+1 for the Ping battery. I've had mine for 2+ years and it performs just as well as when I got it. I have a 36v 20ah battery and it still holds a full charge.

 

[wesnewell]

Get 6 of those 4s packs and run them as 12s2p. You will get at least 20 miles out of them, and it's small and will only weigh 7lbs total. Get this to monitor voltage.
http://www.ebay.com/itm/Waterproof-Digital-Voltmeter-DC-15V-To-120V-Red-Led-Voltage-Digital-Panel-Meter-/170846310527
And an rc lipo charger. Total cost under $200.

 

[dogman dan]

Since you said cheap and good, pingbattery. 36v 15 ah, but if you want longer range get the 20 ah. Any bigger, and it gets hard to carry but a 36v 20 is the same size as your sla pack, and only 15 pounds. Range is between 22 and 35 miles depending on how fast you go, and how much you pedal.

There are ok batteries from other places, Sun thing is one ebayer that also sells a pouch cell lifepo4 pack pretty cheap.

I've owned lead, nicad, ping lifepo4, and HK lipo. By a gigantic margin, the cheapest cost per mile was pingbattery. To me that meets the criteria of both cheap and good. On your current bike, a ping 36v 20 ah should last 3-4 years ( could be longer), provided you don't store it for the winter improperly. Likely you'll ride year round where you are anyway.

4 years comes from this. Not much more than 4 years ago, some of the first buyers of pings bought them on ebay in early 2008. Some of them are starting to fail, but only after many many many cycles. Mine got killed by my mistake, at 3.5 years. Better cells in the ones sold now, so who knows how long they will go.

 

[adli3381]

Get 6 of those 4s packs and run them as 12s2p. You will get at least 20 miles out of them, and it's small and will only weigh 7lbs total. Get this to monitor voltage.
http://www.ebay.com/itm/Waterproof-Digital-Voltmeter-DC-15V-To-120V-Red-Led-Voltage-Digital-Panel-Meter-/170846310527
And an rc lipo charger. Total cost under $200.

Hey wesnewell,

Which 4s packs should i get, can you link me? and how to make them 12s2p? i am not sure what that is. 200 budget for 20mil is a great deal to me, is there a way i can make it 8 or more packs to run around 30mil?


There are so many battery to pick, a lot of people mention ping battery, but they doesn't look cheap and small, not sure if i can fit them in my battery bag. But thanks for the tip, i will keep learning and looking =)

-Derek

 

[shock]

Get 8 of these:

http://www.hobbyking.com/hobbyking/store/__9174__Turnigy_5000mAh_5S_20C_Lipo_Pack.html

Put them in a 2s4p config, $291 + ship.

 

[docnjoj]

Hey Derick
You can get cheap, and you can get good, but unlikely to get both. Ping is the safest and easiest to use as well as good aftermarket service. Hobby LiPo is a hobby all unto itself, and can be dangerous if you misuse them. Another lower cost battery was mentioned, Sunthing but they do not have a track record like Ping does. I run 2 pings, one is 4 years old.
otherDoc

 

[wesnewell]

The same ones you linked to. The Turnigy 5ah 4s hardcase packs. The nice thing about rc lipo is you can expand it by just adding more to it if you need to. If you want to start with more range, get 9 of them for 15ah. That will give you well over 30 miles. I use 12 of them, but wired as 24s2p. 12 wired as 12s4p would be 20ah, or 888Wh if you want to look at it that way. Riding slow I only charge mine once a week, or every 70 miles. You could use 6s packs for more convenience, but it will cost a little more.

 

[wesnewell]

Get 8 of these:

http://www.hobbyking.com/hobbyking/store/__9174__Turnigy_5000mAh_5S_20C_Lipo_Pack.html

Put them in a 2s4p config, $291 + ship.

That will work too, configured as 10s4p, not 2s4p, but considerably more expensive than the 4s packs per Wh. 10s lico is 37V while 12s is 44.4V. 44.4V will .give your motor a good boost in power and increase top speed a few mph.

 

[adli3381]

Get 8 of these:

http://www.hobbyking.com/hobbyking/store/__9174__Turnigy_5000mAh_5S_20C_Lipo_Pack.html

Put them in a 2s4p config, $291 + ship.

That will work too, configured as 10s4p, not 2s4p, but considerably more expensive than the 4s packs per Wh. 10s lico is 37V while 12s is 44.4V. 44.4V will .give your motor a good boost in power and increase top speed a few mph.

Hey wesnewell,

I kind of understand how you guys calculate the Lico now. so 4s pack x 6 to make is 12s2p will give me 44v and 10ah, and 5s pack x8 to 10s4p will give me 37v and 20ah, or something similar right? can you show me how to put them together as 4s pack x 6 to make 12s2p? like what tools do i need and which cable connect to the other. Graphic demonstration will be great help. Thanks~

-Derek

 

[wesnewell]

[
Hey wesnewell,

how do you configure 4s pack to 12s2p? is there a place that show you how to put them in specific way? some graphic demonstration will be appreciate. Thanks~

-Derek

Set 3 packs side by side. Plug the red from one outside pack to the black of the middle pack, Plug the black of the other outside pack to the red of the middle pack. Do the same for each p group.

 

[shock]

sorry, yes I meant 10s4p. Slightly more expensive per watt hour, but much simpler to setup charging.

 

[wesnewell]

sorry, yes I meant 10s4p. Slightly more expensive per watt hour, but much simpler to setup charging.

Simplest would be to use 6s packs at 12s. that would make full use of 6s chargers output, There's so many ways to do this. I almost always look for the cheapest per Wh if it's a substantial savings.

 

[adli3381]

awesome, thanks for the advice, i think i will start with 6 pack of 4s1p and run then 12s2p, and if i need more range, then I can just add 3 more pack to make is 12s3p. any recommend battery charger? and what is monitor voltage good to have? what do i need to check on the battery? or if the voltage on each battery are different how do i fix it?

-Derek

 

[Tommy L]

awesome, thanks for the advice, i think i will start with 6 pack of 4s1p and run then 12s2p, and if i need more range, then I can just add 3 more pack to make is 12s3p. any recommend battery charger? and what is monitor voltage good to have? what do i need to check on the battery? or if the voltage on each battery are different how do i fix it?

-Derek

Icharger or Hyperion are some favorites here. But please do your self a favor....do it right the first time. Please do not try to save a couple of
bucks between chargers. You want one that does the job correctly. You will most likely have to purchase a Power Supply. Meanwell is well
recognized here on the forum. So ask ask ask..... and if you are not very tech like, just purchase the Meanwell. Some here will use
Computer Server power supplies and modify things. Daddy always says:...... Buy It Right The First Time It is cheaper that way! lol

Tommy L sends.... \\m//

 

[adli3381]

Hey Tommy, thanks for the advice, can you link the power supply you mention? so is the power supply will be able to charge the 4s1p battery and also do some maintenance?

-Derek

 

[Tommy L]

Hey Tommy, thanks for the advice, can you link the power supply you mention? so is the power supply will be able to charge the 4s1p battery and also do some maintenance?

-Derek

Meanwell
http://epbuddy.com/index.php?main_page=product_info&cPath=5&products_id=232

Icharger 306B
http://epbuddy.com/index.php?main_page=product_info&cPath=17_1&products_id=106

The Icharger 306B is the brain and the Meanwell is the Power

This looks to be like a good combo. And with the proper/correct cables/harnesses you will be able to charge all your 4s pack simultaneously.

Yes, It may be a lot of money, but accuracy and quality is a good idea with LiCo and really, quality to charge any chemistry is always a very good idea.

Tommy L sends.... \\m// and you are most welcome. But there are others on here that might have other suggestions, so read the description
on these 2 (two) links above. Peace!

 

[shock]

The only reason i recommended 5 cell packs over 6 cell packs is the topic of a 36v pack. If your electronics and motor will handle 50v than for sure go 12 cells