Customized Deep Cycle 60V 25Ah Lithium Ion Battery for E-bike

[john61ct]

Is there a BMS already wired in?

If no, are the 16S balancing wires accessible from the outside? What type of connector is provided?

______
If yes,

1. please provide a link to the BMS make/model, ideally showing documentation / instructions in English

2. can a "custom shape" order specify that the BMS be kept outside the wrap, with say 30+cm wire leads between the pack and the external BMS?

[libattery21]

Bet it is 500-1000$ for this 1500Wh.

We pay on average much less here in the U.S.A.

I need to inquiry internation freight company next Monday for approximate shipping fee to US. The exact shipping fee can be given when providing the quantity of this product.

sorry for late reply. The shipping fee for this product is around $131.54 USD/Pcs.
So the total payment for 1 Pcs =Sale Price+Shippment fee=$254.79+$131.54= $386.33 USD/Pcs.

Total payment for 1Pcs is about $386.33 USD/Pcs,which is cheaper than $500 USD.

[libattery21]

it is 16S 10P and to be charged at 60V.

16S LFP is comparable to LI 14S,

around here usually called "52V", but actually 51.2V nominal.

Personally I would charge to 55.2V for better longevity

approaching 58.4V would be absolute maximum, IMO only for stress testing and capacity / SoH benchmarking.

We can make this 60V 25Ah product by using NCM or LFP cells.
If using LFP cells: it is 3.2V/Pcs for single cells, 60V/3.2=18.75≈19 S, standard voltage=19 S *3.2=60.8V;
the upper limit of the working voltage of the battery pack =19 S *3.65= 69.35V, the lower limit of the working voltage of the battery pack=19 S *2.5=47.5V.

If using NCM cells: it is 3.6V~3.7V/Pcs for single cells, our factory uses 3.7V/Pcsfor single cells, 60V/3.7=16.2≈16 S, standard voltage=16 S *3.7=59.2V；
the lower limit of the working voltage of the battery pack=16 S*2.7=43.2V, and the upper limit of the working voltage of the battery pack=16 S*4.2=67.2V.

Setting the working voltage of the protection board between the upper and lower limits of the working voltage of the battery pack is more conducive to the long life of the battery, but it may affect the user experience a bit.

[libattery21]

Is there a BMS already wired in?

If no, are the 16S balancing wires accessible from the outside? What type of connector is provided?

______
If yes,

1. please provide a link to the BMS make/model, ideally showing documentation / instructions in English

2. can a "custom shape" order specify that the BMS be kept outside the wrap, with say 30+cm wire leads between the pack and the external BMS?

Unfortunatley,we do not have link to the BMS make/model, ideally showing documentation / instructions.

There is a built-in BMS in the battery pack. The BMS can manage the battery's overcharge, overdischarge, overtemperature, overcurrent, short circuit, balance, collect the voltage of each string of batteries, and the temperature collection harness.

This product is a small battery, and we do not make customization of wrapping BMS outside.

[john61ct]

Yes 19S is what I thought it should be with LFP, you were the one that stated 16S.

So are these 19S, to be charged at 68-69V ?

it is 16S 10P and to be charged at 60V.

And you also stated these were LFP, and only that specific Dynabat cell

never to be changed without notifying customers

and certainly never any mention of other chemistries being a possibility.

[libattery21]

Yes 19S is what I thought it should be with LFP, you were the one that stated 16S.

So are these 19S, to be charged at 68-69V ?

it is 16S 10P and to be charged at 60V.

And you also stated these were LFP, and only that specific Dynabat cell

never to be changed without notifying customers

and certainly never any mention of other chemistries being a possibility.

LFP and NCM cells are both Dynabat cells.They can be LFP or NCM. We can make cells made by LFP or NCM.

I don't know their diffreence until learning this from our technican. Sorry~

[libattery21]

Yes 19S is what I thought it should be with LFP, you were the one that stated 16S.

So are these 19S, to be charged at 68-69V ?

it is 16S 10P and to be charged at 60V.

And you also stated these were LFP, and only that specific Dynabat cell

never to be changed without notifying customers

and certainly never any mention of other chemistries being a possibility.

sorry about this ,the following attachemnt is the product specification of 60V 25Ah:

Thinked 60V 25Ah_Product Specification( Li-on Battery for E-bike).pdf

(347.73 KiB) Downloaded 9 times

[john61ct]

I get invalid format on the PDF

[libattery21]

I get invalid format on the PDF

It is offical version of Adobe PDF,it should not hard to open.

Okay, I''ll put word format in the attachment following:

Thinked 60V 25Ah_Product SPEC(Li-on Battery for E-bike).docx

(102.62 KiB) Downloaded 8 times

[DogDipstick]

Bet it is 500-1000$ for this 1500Wh.

We pay on average much less here in the U.S.A.

I need to inquiry internation freight company next Monday for approximate shipping fee to US. The exact shipping fee can be given when providing the quantity of this product.

sorry for late reply. The shipping fee for this product is around $131.54 USD/Pcs.
So the total payment for 1 Pcs =Sale Price+Shippment fee=$254.79+$131.54= $386.33 USD/Pcs.

Total payment for 1Pcs is about $386.33 USD/Pcs,which is cheaper than $500 USD.

Thankyou for the prompt reply. Much appreciated.

[john61ct]

So that datasheet is for the li-ion (NMC) version

Is there one for the LFP pack you originally posted? The voltages, weight / dimensions, and cycle lifespan would be different.

Do they have separate model #s?

Same pricing and warranty?



Sent from my Nexus 6 using Tapatalk

[libattery21]

So that datasheet is for the li-ion (NMC) version

Is there one for the LFP pack you originally posted? The voltages, weight / dimensions, and cycle lifespan would be different.

Do they have separate model #s?

Same pricing and warranty?



Sent from my Nexus 6 using Tapatalk

do u need LFP or NCM cell?

[john61ct]

I am trying to clarify your offering, as much for the community as myself.

In fact helping educate you, it seems as well.

[libattery21]

I am trying to clarify your offering, as much for the community as myself.

In fact helping educate you, it seems as well.

okay,it seems you make the product info more clear, thanks, man.
so,you are not here to buy products?

we will add product sepcification of 17S later.

[john61ct]

Pushy salespeople are very off-putting

[libattery21]

Pushy salespeople are very off-putting

I do mean you correct my mistake and taught me a lot.

I am just asking if you would interested in buying this product.If u do not buy this product, I would not force you to buy.

[agniusm]

Sounds dodgy AF.
Seller cant provide information on the PCM/BMS inside. I mean you should know everything about your product.
No clean pictures. Is it constructed like many other Chinese brands where you can set your house on fire?
Weight. 10kg +/- 1kg. Really? Manufacturer does not know the weight of hes product. I mean sure you can have tolerances on wire length variations etc but 1kg is like 40 cells worth of tolerance.
Sometimes cheap is too expensive

[libattery21]

Sounds dodgy AF.
Seller cant provide information on the PCM/BMS inside. I mean you should know everything about your product.
No clean pictures. Is it constructed like many other Chinese brands where you can set your house on fire?
Weight. 10kg +/- 1kg. Really? Manufacturer does not know the weight of hes product. I mean sure you can have tolerances on wire length variations etc but 1kg is like 40 cells worth of tolerance.
Sometimes cheap is too expensive

Our techinian is making the English version of BMS specification. He previously only had the Chinese language version.

This product is using Dynavolt cell and its other part is made by our factory. The brand of this product is Thinked. There is no many other brands combined. Only one brand for the cell and the brand- Thinked .

It has UN38.3 and MSDS Quality Certificate. So it will not burn in the house.

Because a battery is composed of multiple cells, the weight will have ±0.1Kg. And the wire length has no tolerance.

[agniusm]

Sounds dodgy AF.
Seller cant provide information on the PCM/BMS inside. I mean you should know everything about your product.
No clean pictures. Is it constructed like many other Chinese brands where you can set your house on fire?
Weight. 10kg +/- 1kg. Really? Manufacturer does not know the weight of hes product. I mean sure you can have tolerances on wire length variations etc but 1kg is like 40 cells worth of tolerance.
Sometimes cheap is too expensive

Our techinian is making the English version of BMS specification. He previously only had the Chinese language version.

This product is using Dynavolt cell and its other part is made by our factory. The brand of this product is Thinked. There is no many other brands combined. Only one brand for the cell and the brand- Thinked .

It has UN38.3 and MSDS Quality Certificate. So it will not burn in the house.

Because a battery is composed of multiple cells, the weight will have ±0.1Kg. And the wire length has no tolerance.

In one of the documents there is stated 1kg tolerance. I see plenty of those on aliexpress, due to manual measure(whaterver that means) allow for 1cm tolerance. Thats on 5x5cm object.
If you dont have english desctiption or clear photos of the product you sell, go and get those sorted before posting. You are selling a product, high risk product and not a cat in the bag. This comunity had enough of crap comming from China. Make it count. Make photos of the welds, state material for busbar, construction of the battery, do english translations of whatever componens must have description, then come and formulate your sales post.

[john61ct]

You're not wrong, but also not realistic.

We should be grateful they are willing to sell to us at all.

says their business culture.

Not as if there are so many choices selling from this side of the world

[libattery21]

You're not wrong, but also not realistic.

We should be grateful they are willing to sell to us at all.

says their business culture.

Not as if there are so many choices selling from this side of the world

We sell products to anyone who willing to buy. There is no such business culture in China as you stated. We all regard you as customers.

[libattery21]

Sounds dodgy AF.
Seller cant provide information on the PCM/BMS inside. I mean you should know everything about your product.
No clean pictures. Is it constructed like many other Chinese brands where you can set your house on fire?
Weight. 10kg +/- 1kg. Really? Manufacturer does not know the weight of hes product. I mean sure you can have tolerances on wire length variations etc but 1kg is like 40 cells worth of tolerance.
Sometimes cheap is too expensive

Our techinian is making the English version of BMS specification. He previously only had the Chinese language version.

This product is using Dynavolt cell and its other part is made by our factory. The brand of this product is Thinked. There is no many other brands combined. Only one brand for the cell and the brand- Thinked .

It has UN38.3 and MSDS Quality Certificate. So it will not burn in the house.

Because a battery is composed of multiple cells, the weight will have ±0.1Kg. And the wire length has no tolerance.

In one of the documents there is stated 1kg tolerance. I see plenty of those on aliexpress, due to manual measure(whaterver that means) allow for 1cm tolerance. Thats on 5x5cm object.
If you dont have english desctiption or clear photos of the product you sell, go and get those sorted before posting. You are selling a product, high risk product and not a cat in the bag. This comunity had enough of crap comming from China. Make it count. Make photos of the welds, state material for busbar, construction of the battery, do english translations of whatever componens must have description, then come and formulate your sales post.

If you think our Chinese posts in this community is crap,you can choose to ignore this post. For you have serious bias on Chinese, I can say what you comment is also crap. We can sell this product to anyone, except for people like you who think Chinese posts are craps will not be regarded as customers.

Please show your respect.

And I reply your comment for people like you have serious bias on China is just for polite manners.

[john61ct]

My apologies, likely I'm generalizing too much from my living and doing business in Asia a couple decades.

But it will help your cause in Western markets, if you can take some of agnuism's points as constructive action items

especially since afaic none of your competitors do.

[libattery21]

My apologies, likely I'm generalizing too much from my living and doing business in Asia a couple decades.

But it will help your cause in Western markets, if you can take some of agnuism's points as constructive action items

especially since afaic none of your competitors do.

I also admit I am too stubborn about some points of my views. I am sorry about my attitude as well. Now I totally understand your feeling about Chinese market.

I also hate those Chinese manufacturers who produced bad quality products without responsibility. However, China also has good quality products .

Our prodcuts have UN38,3 and MSDS Certificates, which means you do not need to worry about burning in the house.

[john61ct]

Well "quality" can be subjective.

Best to be "radically transparent", really helps overcome default distrust.

For example, track down the model(s) BMS used, publish the datasheets and instruction manuals in English.

Best to offer ones that are user-adjustable in their parameters, and individual cell/group voltages viewable, ideally from a phone app via BT.

Personally, I would require the balance leads be accessible, and the BMS easily replaced, since they can be the first point of failure and damage the pack.

But I understand only custom pack makers can do that.

Dimension: 344 * 208 * 73 mm (or Customized)

Is that last bit actually available? for what MOQ?