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Iota DLS-30/IQ4 charging graph


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#11 rubberlegs

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Posted 30 January 2023 - 11:01 PM

SoC	Voltage	Amps	time	        Elaspsed time
0%	12.25	27.21	09:16 AM	
0%	12.41	24.84	09:17 AM	00:01:00
11%	13.19	8.74	10:16 AM	01:00:00
31%	13.38	4.86	01:23 PM	04:07:00
41%	13.39	4.58	03:39 PM	06:23:00
61%	13.44	3.46	08:14 PM	10:58:00
				
61%	13.35	4.84	09:26 AM	10:58:00
66%	13.48	2.03	11:25 AM	12:57:00
67%	13.48	2	11:59 AM	13:31:00
68%	13.49	1.9	12:31 PM	14:03:00
70%	13.49	1.84	01:31 PM	15:03:00
72%	13.49	1.81	02:22 PM	15:54:00
76%	13.5	1.78	04:32:00 PM	18:04:00
78%	13.5	1.71	06:10:00 PM	19:42:00
80%	13.5	1.63	07:10:00 PM	20:42:00
82%	13.5	1.63	08:16:00 PM	21:48:00
85%	13.51	1.52	10:12:00 PM	23:44:00
				
85%	13.48	2.31	09:47:00 AM	23:44:00
87%	13.51	1.44	10:32:00 AM	24:29:00
87%	13.51	1.36	10:59:00 AM	24:56:00
88%	13.52	1.27	11:59:00 AM	25:56:00
90%	13.52	1.22	12:59:00 PM	26:56:00
91%	13.52	1.3	01:50:00 PM	27:47:00
92%	13.53	1.22	02:59:00 PM	28:56:00
94%	13.53	1.22	03:59:00 PM	29:56:00
95%	13.54	1.19	04:59:00 PM	30:56:00
96%	13.54	1.17	05:59:00 PM	31:56:00
97%	13.54	1.15	06:59:00 PM	32:56:00
98%	13.54	1.07	07:59:00 PM	33:56:00
99%	13.54	1.06	09:00:00 PM	34:57:00
100%	13.55	0.98	10:00:00 PM	35:57:00
100%	13.56	0.85	11:48:00 PM	37:45:00

Here's how our DLS-30/IQ4* charged our new SOK 100Ah lithium battery. This was the second 0-100% charge that our SOK battery instructions called for, to calibrate the battery management system. Perhaps it would have charged even higher, but I gave up at almost 38 hours and "100%". I should have gone further with our solar LiFePO4 charger, but it wasn't hooked up for a few more weeks.

 

I suppose why I've been told it will only charge a LiFePO4 battery to around 80% is because it takes too long to continue. But plugging in overnight before a trip will get us pretty high, and driving an hour will get us topped off.

 

* designed for lead acid batteries


Edited by rubberlegs, 30 January 2023 - 11:02 PM.

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#12 Jon R

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Posted 31 January 2023 - 03:38 AM

Looks to me like the charger was in power supply mode.
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#13 Vic Harder

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Posted 31 January 2023 - 04:40 AM

How are you verifying SOC %?


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#14 rubberlegs

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Posted 31 January 2023 - 05:17 AM

SOC% was from the battery's BMS.


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#15 Old Crow

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Posted 31 January 2023 - 06:00 PM

It would be interesting to see what the DLS30/IQ4's LED (on the fan end of the unit) does during a charge of a LiFePO4 battery.  I assume that's not easy to see (given where the DLS is mounted).  But I just don't know if that's the case.  Is it possible to see the LED or its reflection?

 

The manual (here) says this:

 

"THE IQ4 LED INDICATOR (ONLY ON DLS MODELS WITH INTERNAL IQ4) DLS models with an internal IQ4 smart-charger give the user the benefit of automatic Bulk, Absorption, and Float stage charging. This increases the charging capacity of the DLS charger, decreases charge times and insures proper and safe battery charging without over-charging. The green LED on the fan-end of the DLS will indicate which charging phase the DLS unit is currently in. When the unit is first activated, the LED will flash as it reads the number of the cells in the battery. The unit will then proceed directly to the Bulk charging or Float charging phase depending on the charge status of the battery. Use the LED CODE TABLE for reference when checking the LED."

 

The LED code table shows the LED should flash six times when plugged in, then go into a rapid-flashing green (Bulk).  When it goes into Absorption, the LED will slow-flash green.  And when it goes into Float the LED will be solid-green.

 

(Note: The table also shows voltages as Bulk=14.8, Absorption=14.2, Float=13.6 when you multiply them out)

 

After reading through the text description of how the charger works (in post 1), my first thought was the LED would, in a long charging session, proceed through all three modes. Bulk mode would normally be waiting for battery voltage to rise to 14.8 but if it doesn't do that within 225 minutes, it would go ahead and switch to Absorption mode.  And Absorption mode simply runs for 480 minutes before switching to Float.

 

The other thought that occurs to me is I wonder if results vary by battery manufacturer.  LiFePO4 battery chemistry is (I assume) the same but Battery Management Systems may be programmed differently by the different battery manufacturers. 

 

 

Edited 2/2/23 to add:

 

Newer DLS30/IQ4 units may have LEDs with multiple colors.  According to this December 2021 announcement the colors are solid green=Bulk, flashing red=Absorption, amber=Float. When not powered, the newer LED appears to be translucent white while the older LED model appears to be green.


Edited by Old Crow, 02 February 2023 - 03:17 PM.

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