Ebike battery help please

N

noratrace

10 mW
Joined
Jun 13, 2018
Messages
21
I had focus jarifa.the motor packed up (impulse 2 motor ). So I brought another Ebike which is a hiabike yamaha 36v 11ah .4.0 fullsevern lt. My focus battery is 36v 17ah and still in very good condition. So I want to connect it to my hiabike
.hiabike has 3 terminals at the battery socket one should be positive one negative and third i don't know. My focus battery has 4 cables running from battery 1 thick red positive cable. 1 thick black negative. Then white skinny cable. And a brown skinny cable .not sure how to connect help needed please
 
Need to join focus wires too hiabike terminal socket.(3 prongs) (Where battery connects) in the second picture
 
My hiabike is yamaha and is only couple months old so I carnt do to much damage cus of warrantee /garantee.but hiabike battery is only 36v 11ah. And my jarifa focus battery is 36v 17ah in good condition
 
The part that is white is hard glue holding cables in at bottom of battery .the other end of cable plugs into the first picture
 
Somewhere I read online that the three prongs socket on hiabike. is red wire positive .Black goes nagative and the third (prong )wire is grey
 
Really Sorry everybody about the cables mix up when I opened the battery up more .I just found all those wires..It looks like the thin white and thin brown cable is a diy job (first picture )
 
You can't just use the Focus battery. The Yamaha battery must be connected at all times, it communicates with the controller. If there is no communication the bike switches off. You can add the
Focus battery in parallel as long as the voltage is close when you connect them. I run an extender battery like this on my Haibike.
 
Thanks Chris_n. When you say parallel do you mean ONLY red positive cable and black negative cable is used from focus 36v 17ah battery. (And no other cables).And is connected to the red positive and black negative 36v 11ah yamaha hiabike battery . .reds too reds .then black too black .. Thanks Chris
 
noratrace said:
Thanks Chris_n. When you say parallel do you mean ONLY red positive cable and black negative cable is used from focus 36v 17ah battery. (And no other cables).And is connected to the red positive and black negative 36v 11ah yamaha hiabike battery . .reds too reds .then black too black .. Thanks Chris
Click to expand...
Yes just connect the positive to positive and negative to negative having made sure the voltage is the same. Seperate them for charging otherwise you are bypassing the BMS. Be aware that the Yamaha battery doesn't show full voltage until it is on the bike and switched on.
On mine I have made the connection to the underside of the battery terminals on the bike and have an external XT60 connector to make the connection. Always fit and turn on the Yamaha battery and then check voltage before connecting the extender. If you do connect the extender first you will get sparks as the capacitors charge instantly.
 
Thanks for the reply. I understand the cables now but if there's eny soldering involved on bike terminals inside then can't do it cus of my warranty/garrentee
 
Thought I'd check battery levels as battery not been used for sometime. Thats all it reads is 0.8v on positive negetive cables coming out ov the battery. panic I thought.is that normal. I opened the battery up too look and test but that reads 41v inside on positive and negative cables .If this is normal. When I eventually use this battery as and extender battery. Do I wire from inside the battery 41v cables.
Inside or red black cable coming out the battery which only reads 8v
 
chris_n said:
noratrace said:
Thanks Chris_n. When you say parallel do you mean ONLY red positive cable and black negative cable is used from focus 36v 17ah battery. (And no other cables).And is connected to the red positive and black negative 36v 11ah yamaha hiabike battery . .reds too reds .then black too black .. Thanks Chris
Click to expand...
Yes just connect the positive to positive and negative to negative having made sure the voltage is the same. Seperate them for charging otherwise you are bypassing the BMS. Be aware that the Yamaha battery doesn't show full voltage until it is on the bike and switched on.
On mine I have made the connection to the underside of the battery terminals on the bike and have an external XT60 connector to make the connection. Always fit and turn on the Yamaha battery and then check voltage before connecting the extender. If you do connect the extender first you will get sparks as the capacitors charge instantly.
Click to expand...
Not sure if you see my next question as this is oldish post hello but it's above this
 
You must log in or register to reply here.

Similar threads

C
Chimera”... Antique style E bike build, circa 1915...why and how
Replies
6
Views
973
classicalgas
C
C
Installing torque sensing pedal assist PAS on a tandem bike
Replies
5
Views
1,213
E-HP
E-HP
E
Lawn mower brushless controller
Replies
0
Views
932
Electric turnip
E
A
low speed, high torque motor and Ligo battery choice help
Replies
10
Views
1,547
amberwolf
amberwolf
R
    • Like
Really good article comparing Bafang vs. Tongsheng vs. CYC
Replies
12
Views
10,615
999zip999
999zip999
Back
Top