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Thanks a lot for the input. I am too ignorant to question anything about E-Bike batteries. This why I am here, to see what people who know more than me think when the Chinese battery pack assembler says that good nickel sheet connectors are enough and secondary wiring is not necessary below 70V...

Any balancing BMS producer you have a preference for? ...any Chinese balancing BMS producer you have a preference for?

-Cell brand is LG. Do you mean ask for the cell model? -The controller determines maximum current but isn't it the BMS that manages balanced charge? In addition to the charger if it is a good one. Excuse my ignorance. -...why are you so sure that ''pure nickel'' for an answer is a lie if you...

II. Same questions as above for a Reention DP-9C at 52V 21AH containing 18650 3500mah LG lithium-ion cells arranged at 13S 6P LG. This pack feeds a 1000W 48V Bafang M620 / MM G510.1000.C. mid motor.

@ ProphetZarquon @ tomjasz

Let's assume you have a battery pack in a Reention SF2 case, charging a 36V 350W Bafang G070.350.D hub motor. The battery pack provides 36V 24.5Ah with LG 18650 3500mah cells arranged at 10S 7P. With pure nickel sheet connections, insulated cell groups & insulated BMS. Questions: a) how thick...

I have a question about the thickness of nickel strips.

These. are. SO USEFUL!! Thank you very much!!

Newbie question number two, all inputs welcome. Below you will find the answers a chinese battery pack maker sent me by email recently. Any comment is welcome, but my question refers to Q5 below. Money is no issue, I don't want to burn the house to save a few bucks on the battery pack. What...

newbie question coming your way: By "secondary set of wiring" do you mean pure-nickel plated connectors connecting All the cells within a group, or wiring between the cell groups please?

If it is of any interest to you, the Jeeps are made by these guys: https://www.jobobikes.com/electric-bike/electric-mountain-bike/popular-mid-drive-mountain-ebike-26inch-4-0.html I understand that Watt Wagons buy in China, but assemble in the USA. If you know yourself, could you please let me...

Having said this, defining the meaning of "any bikes with the same components" and then comparing ebikes is actually quite a time consuming exercise, as you will probably appreciate yourself given that you seem to know a lot more about the topic than me...

In the EU, ebikes with 1000W motors are not so widely available due to regulatory constraints. I have the impression that it is easier to get a Bafang M620 in North America. Even some of the chinese producers I've been talking to are a bit hesitant to sell me an ebike with the M620 when they...

"Heck, at the prices they're charging they could just state outright exactly how the packs are made" Amen. This is why I started this thread really. The most expensive FREY ebike costs as much as a second hand car in Europe. At that price point, you have to answer some questions mate. No...

The one disadvantage I have discovered after talking to many other chinese producers is that an external battery case at 1008Wh or more, is likely to be big in size. And if it is big in size and you use it on rough terrain a lot, the screws are likely to loosen up after a while due to vibration...

Thank you very much for your inputs. I understand your post just fine (and don't smoke in general) ;-) "I would worry more about getting the most Wh that I could afford, than about the case becoming obsoleted. " I agree with this. I don't wish to buy a 1000W motor that is matched with a...

To be honest, I am not sure myself how much of a difference torque of 90Nms will make vs. 160Nms when riding uphill on a 1500 meter mountain. It's just that I don't wish to find out while taking a turn at ...700 meters of altitude, that's all ;-) :-)

In China the reluctance is partly cultural and partly speculative. If they had a Bosch battery case on board, they would advertise it just fine. ;-) I need the torque of the M620. I need those 160 Nms to climb mountains. I ride a regular bike on flat surfaces. I know there are other solutions...

The thing that draw me to FREY in the first place is the M620. In Europe, it is hard to find this specific motor.

:-D :-) I concede the point on "over thinking it" but qualify it by saying that I would not have to think much if their specs were transparent and detailed. However, you are right, I am not convinced FREY is for me. Thank you for your inputs.