Lithium pack with electric parking break

[jasonojordan]

Originally Posted by EcoChandler

@jasonojordan (forgot to quote your thread)

The BMS has a ton to do with it. The BMS is what tells the battery to shut down a lot of the times. That's why buying a quality battery with a quality BMS and cells is even more essential when installing into a cart with an EMB and zero CAN comms between that battery and the controller.

I am aware of the function of the BMS. Just this is the 1st experience I have had with one that also has a CAN function that controls the charging vs other traditional systems.

[InVision]

I will look for those settings.

I have a Curtis 1234-2371 controller if that matters.

M

[InVision]

Originally Posted by EcoChandler

@jasonojordan (forgot to quote your thread)

The BMS has a ton to do with it. The BMS is what tells the battery to shut down a lot of the times. That's why buying a quality battery with a quality BMS and cells is even more essential when installing into a cart with an EMB and zero CAN comms between that battery and the controller.

What info do I need on BMS that would be helpful?

Thank You

M

[InVision]

Originally Posted by TheCartBoy

Since we are changing the nominal voltage, we have to change the pull-in and holding % for the main contactor and EM brake. I'll need to know your current settings for those.

Thank you

[TheCartBoy]

On 48V nominal:
100% = 48V
80% = 38.4V
65% = 31.2V

On 58V nominal to achieve those same voltages:
83% = 48V
66% = 38.4V
54% = 31.2V

[InVision]

I am a little out of my league here. I really do appreciate your help @TheCartBoy. Just a guy with a cart and programmer.

Below I tried to sum up what I think were all the changes I would need to make. Which one would YOU choose if it were your cart?

Thank You.

M

Setting that would need to be changed for a 48V setting:

Normal V = 48V
Over V = 122%
Under V = 80%
Reset Cell = 2.09
Full Cell = 2.04
Empty Cell = 1.73
BDI = 100%
Pull in = 100%
Holding = 80%
EM Brake = 65%

Setting that would need to be changed for a 58V setting:

Normal V = 58V
Over V = 122%
Under V = 80%
Reset Cell = 2.013
Full Cell = 2.013
Empty Cell = 1.6
BDI = 100%
Pull in = 83%
Holding = 66%
EM Brake = 54%

[TheCartBoy]

My suggestion is to use everything you have listed under 58V. The whole reason we have to tell your controller it has a 58V nominal battery voltage is to overcome the restricted limits on the undervoltage, making this slightly more complicated.

Pull in on both is 83%
Holding on contactor is 66%
Holding on em brake is 54%

Just trying to make it very clear, ask any questions if you are still unsure.

[InVision]

Thanks. Kinda scary. The reason we adjusted the cells is for the built in meter?

M

[TheCartBoy]

Yep that's the only reason.

You know how to save a CPF file and restore it right? That's your backup/undo button. If this is new to you, check that section in the 1313 manual first.

[InVision]

No but I will. figure it out before changing. TY

This change will not effect my performance right?

M