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Makes And Models => Zero Motorcycles Forum | 2013+ => Topic started by: stevenh on April 10, 2017, 03:42:08 AM

Title: Current Limiting (is it normal)
Post by: stevenh on April 10, 2017, 03:42:08 AM

I was on a pretty normal ride today, a couple of long easy runs.  No hard acceleration.  I was trying to run down the pack and recharge to see if I could get my balance back down.  It was 60mv after I disconnected from storage in March (after learning about the new recommendations).  I was going over the logs from today and see a bunch of these:

07943     04/09/2017 11:15:11   Discharge level            051 AH, SOC: 51%, I:  2A, L:3640, l:3641, H:3663, B:023, PT:027C, BT:032C, PV:102211, M:Bike On
 07944     04/09/2017 11:15:11   Discharge cutback          87%
 07945     04/09/2017 11:15:11   679A
 07946     04/09/2017 11:16:11   Discharge level            052 AH, SOC: 50%, I: 75A, L:3585, l:3627, H:3610, B:025, PT:027C, BT:032C, PV:100687, M:Bike On
 07947     04/09/2017 11:16:11   Discharge cutback          85%
 07948     04/09/2017 11:16:11   666A
 07949     04/09/2017 11:17:11   Discharge level            053 AH, SOC: 49%, I: 52A, L:3593, l:3622, H:3617, B:024, PT:027C, BT:032C, PV:100897, M:Bike On
 07950     04/09/2017 11:17:11   Discharge cutback          84%
 07951     04/09/2017 11:17:11   654A

I do see that I have had these all along, seems strange though.  Has anyone else seen anything similar?

Steve

Title: Re: Current Limiting (is it normal)
Post by: Kocho on April 10, 2017, 05:11:00 AM

I think this is normal. See my thread on a similar topic.

http://electricmotorcycleforum.com/boards/index.php?topic=6786.0 (http://electricmotorcycleforum.com/boards/index.php?topic=6786.0)

It appears in your log this is called "discharge cutback", where on newer firmware it is "Batt Dischg Cur Limited".

Title: Re: Current Limiting (is it normal)
Post by: stevenh on April 10, 2017, 05:38:49 AM

Ah, my MBB log shows it like you state:

07914     04/08/2017 10:20:48   Riding                     PackTemp: h 16C, l 15C, PackSOC: 61%, Vpack:104.138V, MotAmps:   0, BattAmps:   2, Mods: 10, MotTemp:  24C, CtrlTemp:  15C, AmbTemp:  11C, MotRPM:1581, Odo: 5979km
 07915     04/08/2017 10:20:48   Batt Dischg Cur Limited    679 A (98%), MinCell: 3666mV, MaxPackTemp: 16C

The BMS log shows the "Discharge Cutback" message at the same time.

Steve

Title: Re: Current Limiting (is it normal)
Post by: hubert on April 10, 2017, 01:19:02 PM

Hi,

So far I was never able to get a BMS log out of my 14'S. Only the MBB log. By the way, does anyone know the meaning of: "L:3585, l:3627, H:3610, B:025"?

Title: Re: Current Limiting (is it normal)
Post by: stevenh on April 10, 2017, 03:34:31 PM

I was assuming L=low cell mv, H=high cell mv, B=balance voltage?  Not sure on I.  The B number does match what my phone shows for balance mv.

Steve