Help wiring BMS

[ulti]

Recently I decide to go at 20S LiPo with HT 3525. I've received BestTechPower BMS HCX-D131:
http://www.bestechpower.com/74v20spcmbmspcbforli-ionli-polymerbatterypack/PCM-D131.html

Now I see there is no C- port for charger on BMS, only B- (should be battery -) and P- (should be discharge/load -).

Can you help with wiring, should I connect charger - to P- ?

Thanks

 

[TheThirdWheel]

First of all, the positive (red) wire from your battery does not connect to the BMS. Just make sure of this.

On the negative (black) wire coming from your battery, connect this to B- on the BMS.

Then P- on the BMS goes out to your controller along with the positive wire I mentioned earlier.

The charger positive connects anywhere into the positive wire from your battery, while the charger negative wire connects to C- . There should be a "C-" or "CH-" on the BMS somewhere. Look harder!

So in summary:

Battery negative--> B- (on BMS) --> P- (on BMS) --> controller negative
Battery positive --> controller positive
Charger negative --> C-/CH- (on BMS)
Charger positive --> battery positive

I can't see a "C-" in the pictures of the BMS so I suggest you contact the seller or consult the user manual.

I hope this helps!

 

[dnmun]

if you will post up a picture of your D131 with labels printed on it by hand on the three different solder pads for the wires i can tell you which one to use.

 

[izeman]

stole from another thread: C- is in the right lower corner