Edit: removed the suspicion that UPP could have been the original supplier from this post.
I'm working on a bike from a customer who has had his second BBS02 part fail on him and he wanted me to look over the whole build.
Here's part of the carnage. It's a hailong style battery pack sold by Lunacycle in 2016. AKA 'shark pack'.
Okay, we've got multiple design issues here..
1) the only thing protecting the battery cells on the top and bottom from the hard plastic case is a layer of kapton tape.
2) The battery cell assembly can shift side to side ~5mm and bash up against the plastic screw area seen in picture 1. Eventually this could damage on the nickel tabs and make the tabs separate from the cell, potentially puncturing the cell in the process ( depending on how it was welded )
3) If you install this battery pack vertically or diagonally on your bike, the whole 6-8lb. cell assembly rests on a single piece of duct tape. As you can see in picture 2, this is less than adequate. I imagine this could eventually deform that cell and short it.
Lunacycle and a bunch of various alibaba vendors, American vendors, etc sold these for a long time. I really wonder how many battery fires are due to shitty designs like this.
If you have one of these, i'd put it in a frame bag since the mounting points are known to be janky as well. And add high heat rated insulation on the weak points.
I'm working on a bike from a customer who has had his second BBS02 part fail on him and he wanted me to look over the whole build.
Here's part of the carnage. It's a hailong style battery pack sold by Lunacycle in 2016. AKA 'shark pack'.
Okay, we've got multiple design issues here..
1) the only thing protecting the battery cells on the top and bottom from the hard plastic case is a layer of kapton tape.
2) The battery cell assembly can shift side to side ~5mm and bash up against the plastic screw area seen in picture 1. Eventually this could damage on the nickel tabs and make the tabs separate from the cell, potentially puncturing the cell in the process ( depending on how it was welded )
3) If you install this battery pack vertically or diagonally on your bike, the whole 6-8lb. cell assembly rests on a single piece of duct tape. As you can see in picture 2, this is less than adequate. I imagine this could eventually deform that cell and short it.
Lunacycle and a bunch of various alibaba vendors, American vendors, etc sold these for a long time. I really wonder how many battery fires are due to shitty designs like this.
If you have one of these, i'd put it in a frame bag since the mounting points are known to be janky as well. And add high heat rated insulation on the weak points.