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Old 11-16-2013, 08:31 PM   #1
TreeBass
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Default New batteries

Picked up new batteries, and took some readings before I charged them up:

15 Nov 13- pre charge
1) 6.15
2) 6.14
3) 6.24
4) 6.22
5) 6.15
6) 6.05

Pack after charge- 37.8

So if I'm tracking, I need to run it down to 75% SOC and do this for 10 or so charges to get 100% SOC, correct?

Do I need to be concerned with the current pack reading?

Thanks
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Old 11-16-2013, 08:37 PM   #2
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Default Re: New batteries

new batteries need to be charged before first run
first run should be down to 75%
also it may take a while for the first few charges , plug it in and let it turn it's self off
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Old 11-16-2013, 08:44 PM   #3
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Default Re: New batteries

You do not HAVE to discharge to 75% during the break-in process, just don't discharge past 75%. Shallow discharges and subsequent recharges is what the break-in process is all about. Once you're done this cycle 10 times it is then safer do ride normally to 50% SOC.
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Old 11-16-2013, 08:46 PM   #4
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Old 11-16-2013, 08:50 PM   #5
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Default Re: New batteries

Thanks guys, thought I was tracking right. I have johnnies chart on my workbench
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Old 11-16-2013, 09:05 PM   #6
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Default Re: New batteries

This is from page 6 of the Trojan battery guide. The entire guide is available on the Trojan web site. Easy to find under tech support. To summarize: Charge new batteries before first use. It will take 50-100 cycles before batteries will reach full capacity.

î Conduct a visible inspection. Check for visible damage including cracks, dents, deformation and other visible abnormalities. The tops of the batteries and terminal connections should be clean, free of dirt and corrosion, and dry. Any fluid on or around the battery could indicate that the case is not properly sealed or that the battery has been over-watered. Ensure that there is one cable per battery.
î Check the battery’s state of charge. Trojan batteries are fully charged and tested before they
are shipped, but all batteries self-discharge when they are not in use which can occur during transportation and storage. The best way to determine a battery’s state of charge is to check the specific gravity of the battery using a hydrometer. For instructions on how to use a hydrometer please refer to page 27. The rate of self-discharge depends on many factors including time, battery type and the ambient temperature where the battery is stored, so it is important to understand the battery’s state of charge upon arrival to determine if an initial boost charge is needed. When checking the specific gravity, make sure the electrolyte level covers the plates, but be sure not to overfill the battery as the level of electrolyte will rise during the charging process. Refer to the Watering Section on page 22 for more information about adding distilled water to your batteries.
î Apply initial boost charge. Trojan recommends applying a boost charge to your new batteries. A boost charge corrects voltage imbalances between individual cells and restores the battery to a fully charged state to maximize system performance. The term boost charge refers to fully charging your batteries before they are used.
î Two methods can be used to condition your new product. One is to use the chargers that are automatic or pre-programmed. If this method is used, allow the charger to go through the full cycle. Some chargers allow the settings to be adjusted and to operate in a manual mode. In this situation use the following settings:
î Boost charging at CONSTANT CURRENT, without voltage limit, may be carried out as specified: charge at 3% of C20 until the voltage stops increasing for three consecutive hourly readings. Under CONSTANT VOLTAGE conditions, the recommended boost charge voltage is 2.58Vpc with the charger output current limited to 3 – 5% of the 20-hour capacity. The minimum recommended value is 2.45Vpc; however, this will result in an extended boost time.
î The boost charge is not complete until the specific gravity readings of each cell remain constant over three successive hourly readings and all cells are gassing freely. If you have questions concerning initial boost charge, contact Trojan Battery Company’s technical support.
c. What to Expect from your Trojan Battery
î It is expected that a new battery will need time to provide full, peak capacity. Trojan batteries take between 50 – 100 cycles to work up to providing full, Amp-hour capacity.
î When operating batteries at temperatures below 80°F (27°C) they will deliver less than the rated capacity. For example at 0°F (-18°C) the battery will deliver 50% of its capacity.
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Old 11-17-2013, 07:19 AM   #7
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Default Re: New batteries

Quote:
Originally Posted by TreeBass View Post
Picked up new batteries, and took some readings before I charged them up:

15 Nov 13- pre charge
1) 6.15
2) 6.14
3) 6.24
4) 6.22
5) 6.15
6) 6.05

Pack after charge- 37.8

So if I'm tracking, I need to run it down to 75% SOC and do this for 10 or so charges to get 100% SOC, correct?

Do I need to be concerned with the current pack reading?

Thanks
After being charged the pack voltage should be 38.2V or greater.
You have a charging issue of some kind on other.

Also, a slight misconception between SOC and Capacity (AH).

A new battery will charge to 100% SoC on the first charge and on each subsequent charge until the end of its useful life is approached.

The same % SoC vs Voltage chart is used for a 10AH battery, a 100AH battery, a 1000AH battery, etc. The Amp-Hour capacity varies, the % SoC does not.

A new battery does not reach its full storage capacity (AH rating) until is has been charged and discharged several times.

---------
As mentioned, you do not have to discharge a new battery pack down to 75% SoC before recharging, the caveat is to not discharge them below 75% SoC during the first dozen or two charge cycles.

New batteries should be charged after each use, just like mature batteries.
Or at least each night after multiple short trip during the day.
Don't let batteries of any age sit for days, or hours, in a partially discharged state.

If you only make short trips, intentionally make a few longer ones while breaking in new batteries.

-------
What brand batteries?
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Old 11-17-2013, 10:30 AM   #8
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Default Re: New batteries

Great explanation, thanks for that. These are trojan t105's, second charge after running about a mile produced the same pack reading.

So I guess I need to start checking the individual batteries themselves?
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Old 11-17-2013, 10:40 AM   #9
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Default Re: New batteries

That voltage is far too low.
After a full charge and a one mile ride, you should be reading over 38.2V on a new set of T-105 batteries.

Check the battery in your DVM.

What charger you using?

----------------
If possible, check the On-Charge voltage on the battery sense wires going into the charger's control board.
It should be identical with the voltage measured at the battery pack's main positive and negative terminals


-----------
Also, the individual voltages should be within 0.1V of each other.
If not, there are some things that need to be done to equalize the pack.
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Old 11-17-2013, 11:25 AM   #10
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Default Re: New batteries

Quote:
Originally Posted by JohnnieB View Post
That voltage is far too low.
After a full charge and a one mile ride, you should be reading over 38.2V on a new set of T-105 batteries.

Check the battery in your DVM.

What charger you using?

----------------
If possible, check the On-Charge voltage on the battery sense wires going into the charger's control board.
It should be identical with the voltage measured at the battery pack's main positive and negative terminals


-----------
Also, the individual voltages should be within 0.1V of each other.
If not, there are some things that need to be done to equalize the pack.
I'll check the battery in the DVM, and here's my charger



It's a manual charger

I'll check the individual voltages and post them shortly.

I have no idea about this one: check the On-Charge voltage on the battery sense wires going into the charger's control board.
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