Jump to content
lineslim

Hoverboard battery wont charge - BMS or bad cell?

Recommended Posts

Hi,

I got a hoverboard for free from a friend because it would not power on or charge at all (no red light on charger). I measured the battery voltage to be 17V (a 36V 10S2P pack with Samsung cells, see pictures). After opening up the battery pack I tried to charge it by connecting the charger directly to the B+ and B- on the BMS (for short periods monitoring the voltage and temperature regularly). When reaching around 32-35V I was able to power on/off the board. Foot sensors seemed to work but it kept displaying a red battery symbol and beeping to signal low battery. Still it would not charge "the normal way" through the charge port. Shorting C- and B- (as I saw in a youtube video) starts the charging but it cuts out as soon as the short is removed. I have also tried to "reset the battery" according to the manual by swiching the board on/of at certain intervals,

From what I have learnt this is likely a case of either a dead BMS or bad cells in the pack? Is there any way I could determine which of these it might be without taking all the cells apart? Or is there another way of trying fixing this problem before I go and buy a new battery?

Would really appreciate your advice!

1.jpg

2.jpg

3.jpg

Share this post


Link to post
Share on other sites

Before all,I suggest you to ask the manufacturer for professional help.

As I know,there are two kinds of hoverboard batteries:24V and 36V.And their voltage will change in the range of 24V-29.5V ,or 36V -42V.You'd better make sure the voltage is right(maximum of the range) while the battery full charging.If you have an ampermeter,try to measure the current(be careful) of the battery with a load.Normally,the output current will be 5A to 10A in different dip angle.If your battery works well,maybe the reason is the boards.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...