Panasonic cell 48v 22ah lithium battery

[Bryony]

Hi

Has anybody bought a better from this supplier?

Surely this is too good to be true. Even with $34 postage it seems way too cheap. Thoughts? See link below.

AU $108.65 15%OFF | Panasonic 48v 22000mAh 1000w 13S3P lithium-ion battery for 54.6v electric bicycle Scooter with 25A BMS download + charger
https://s.click.aliexpress.com/e/_cpNHvo

 

[amberwolf]

if it seemst oo good to be true, well....you already know how that ends.

to get a 48v22ah pack, with charger, $75 plus $12 shipping that only takes less than two weeks to get here from china....


also, their specs don't make sense. it says it's 13s3p, and that it's 48v 22ah. 13s is right for 48v, but to get 22ah with only 3p means 7ah+ per cell, which is impossible with present 18650 cells.

gives a 40a peak output current, whcih means 13.3a per cell, which isn't that bad for good cells, but it says the max continuous is only 15a, which means only 5a max per cell. i suspect there'd be a fair bit of heat running it at that level. then it says rated current is 10a or more....

at a guess the "output 18 lines, length 200mm, red and black each" means they use 18g wire for the output leads. while i guess that would work, i think it's a little thin.

it also has terminology that is poorly translated, as there's nothing called a "download bms" that 've ever heard of.

it says it includes the charger in the title, but the specs (quoted below) says that you should buy a charger.

the size of the pack says there maybe a 10cm error, meaning that the pack could be as little as about half as long as they say it is, or negative half as wide or tall (which is impossible).

etc

Product Parameters
Battery brand: Panasonic
18650 battery type
Single cell voltage: 3.7 V
Combination: 13 Series 3 and
Nominal Voltage: 48 V input voltage: 48 V output voltage: 48 V
After combined capacity: 22000 mAh (22 AH)
Battery dimensions: 240 * 66 * 56mm (there may be a 10cm error) 3 * 13
Outer packing: blue PVC
Interior with protective circuit: overload, excessive discharge, overcurrent, short circuit protection.
For other needs, you can contact the owner, thanks to new and old customers.

Battery charging requirements: Please, in the store to buy another charger.
: The need for a dedicated lithium battery charger;
2: charging voltage: 48V
3: charging current: greater than or equal to 5A

The battery discharge requirements:

1: output 18 lines, length 200mm, red and black each
2: The entry in the start line leads to a length of 2.1 200mm
3: rated discharge current: greater than or equal to 10a
4: maximum instantaneous current: 40A
5: maximum operating current: 13A
* If you need an XT60-type interface, contact us.

 

[amberwolf]

that said...you don't want to just find a "good deal".

you want to find a battery that will actually run your bike or scooter or whatever it is the way you need it to run.

since we know nothing about what you have, or what environment you need it to work in, or how you need to ride it, etc. we can make no recommendations about what you should be looking for.

if you can tell us what bike/etc you have, including what kind of motor, controller, etc. are on it, including whatever specs you have on the battery you're replacing, the total weight (you, bike/etc., cargo, passengers, etc), and also tell us what range you need, the terrain you ride on, the speeds you ride at, the wind/etc condtions you ride in, and any other info you can provide, we can guesstimate how much battery you need and what it will ahve to be able to do.

then you can take taht nfo and begin loking for a battery that meets all the requirements.

 

[Bryony]

Thanks for the response, appreciate it. This was actually for clients, since so many people seem to want an ebike, but don't have the budget. My standard offering of a 1000w motor kit and 48v 15ah Samsung dolphin battery are slightly over budget.

The 48v 15ah Samsung batteries are really good value, so to reduce the price of my kit significantly, I'd need a battery costing about $150 aussie dollars. That is not much, I saw that ebike school.com were using laudation batteries as the real cheap option, which is when I stumbled upon these.

So I guess my question is, what's the best 48v battery with at least 10ah, ideally more, at that price point. I appreciate that performance and number of cycles are likely to be compromised with lower quality.

Anybody used laudation batteries?

 

[Bryony]

Also the bikes are nearly always standard large frame mountain bikes.

 

[Bryony]

Bikes are supposed to be off road but I suspect 99% use on road too and majority of use is on road.

 

[Bryony]

I'm pretty sure reliable 48v 10ah batteries are probably not possible at this price point, but intwrested to know others experienice with cheaper batteries. Thanks