How to Make Dewalt Baterries Work Again
dbrose
New Member
- Joined
- Jan 30, 2021
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- 2
- #1
Using my pole trimmer trimming trees and besides my sawzall with pruning bract, I was ever running inside to switch out batteries. So I came up with and thought to charge my tool batteries via solar and getting a 2d use out of all the batteries I take. Instead of using a 12v lithium battery, why not use these tool batteries?
Here is what I have come up with and then far: a powerbox using Dewalt 20v tool batteries. I already use Dewalt tools and have many batteries. Milwaulkee and others can be used the same, although I am not sure how many manufacturers make a 12v automobile charger. But as long as the batteries are charged in the factory charger periodically to residual the cells internally is kind of what I'chiliad thinking.
Doubling as a bombardment charging station. Going to add four more Ability Dock battery mounts. I institute these on etsy.
Will be adding also 12v post connector, a 24v suitcase solar panel setup with solar charger.
I have the 12v step down converter installed for the 12v and USB outlets.
Dewalt and Milwaulkee brand a 12v machine charger for their batteries so using 2 of these battery chargers, the batteries can be rotated through the external charger for cell balancing. I number my batteries so i know what batteries have been balanced and if ane goes bad information technology's easier to locate later.
Wiring is the typical battery wiring that Will shows in his battery banks, all in parallel (2 banks of 4 when I'm done, may get four banks of 2, merely eight batteries total).
As a battery charging station I decided to also have a couple USB and 12v battery chargers for charging AAA up to D jail cell batteries and 9v. Found batteries and compatible chargers on https://power.tenergy.com/
I have a 400 watt inverter that don't plan to mountain, just have post mounts externally.
Also have a marine blazon fuse box similar to what Will uses in his 12v projects.
This tool box has a tray on tiptop to store various items.
And so this is my offset project powerbox and I'm thinking it tin be used for camping, power outages, fishing, hunting or other outdoor activities.
It'south been a fun project and what I accept done up to this point all works very well.
Attachments
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Ability Dock for Milwaukee M18.jpg
Mike Jordan
Solar Addict
- Joined
- Jun xv, 2020
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- #two
The tool batts balance internally. None of them have external balance leads to connect to the charger. So i don't think that is an issue. I accept been trying to effigy out solar charging 20v batts. No SCC come in a 20v version. The get from 12-24v
What are you doing to solar accuse these batts?
dbrose
New Fellow member
- Joined
- Jan 30, 2021
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- ii
- #3
Hey Mike,
However a work in progress. I don't have the solar done yet. Planning to try 24v solar into solar charger. The 20v batteries should take up to 28v charging and so 24v should be well within range. Can't remember where I saw that at present, I was going through the same questions and then found out I was well within the range of the batteries. The question is volition the solar charger over-charge like you lot are asking? Going to inquiry Solar Chargers to see if whatever can exist programmed equally such with a maximum battery voltage setting. I have non researched that notwithstanding. That's also why I'm adding 4 more batteries to blot and lower overall wattage/voltage. Peradventure someone has suggestions or input.
As a ability station though, it'south really bang-up so far.
I do plan to use ii of the 12v machine chargers Dewalt makes into the 12v cigarette lighter manner outlet. I thought internal balancing only works when connected using the factory charger using all the ports, that'southward why I'thousand thinking I need to wheel them through the mill charger. I could exist incorrect though.
David in nh
Solar Enthusiast
- Joined
- October 18, 2019
- Messages
- 65
- #4
is at that place a low voltage cut off in the battery ,? will you harm bombardment past running it low ? i idea it was in the tool in dewalt stuff ?
i did the same thing using ryobi simply those have congenital in low power cutting off ,
Mike Jordan
Solar Addict
- Joined
- Jun 15, 2020
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- #5
I accept researched this to assay paralysis. Just I am certainly not the good. I don't think you tin can accuse those batts with a 24v SCC without over charging. (besides meet the last paragraph) You demand to command the charge. So far the simply SCC I establish that would work is the Victrons, every bit they are highly customizable and you tin adjust the voltage. I just don't want to dedicate the amount of dollars the Vics price, to solar charging a tool batt power station. Fifty-fifty with a whollotta tool batts you don't have as much watt capacity as a a smaller fix of prizmatic cells. Its just more than price effective to charge the tool batts from another solar power station
The tool batts are all 5s. So to take balancing done elsewhere, you would need 6 contacts, plus the +/- contacts for power. None of the tool batts have that many contacts.
But... you need to know what those other contacts practice. I alive in the Ryobi ecosystem, and then I do not know anything about the dewalt. The Ryobi you can DIScharge all twenty-four hour period with merely the +/- contacts. But you can not accuse them without the other contacts. One of the Ryobi contacts is a temp sensor. The the batts will not accept a charge without the charger reporting back an acceptable temp reading first. With the Ryobi you tin bypass that, past jumping a diode from the temp contact on the batt to the + contact of the batt. I would guess you will find a similar scenario with the dewalt
Symbioquine
Solar Enthusiast
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- Jul 6, 2021
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Source: https://diysolarforum.com/threads/dewalt-battery-power-box.17602/
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