DIY Laptop PowerBank (battery pack to charge your laptop on the go)
video description
You did a great job on this build and on repurposing part of your battery pack from your e-bike, but if I didn't have a pile (pun intended) of 18650 batteries knocking about, I'd opt for the spare batteries. If I was worried about having to power down to change the batteries, I might throw together something with a small protected LiPO and a boost converter to plug into the charging port while changing batteries.
Date: 2020-09-05
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Comments and reviews: 9
Arthur
Hi Scott ( I assume ) I hope that you will help me in constructing my own simple 4 cell 18650 LI-on power bank. I am puzzled as to how to wire it all up with the between the balance charger and the buck converter. I wish to extract 12vdc, 5vdc, 3vdc, and 1. 5vdc for the testing and running of toys that I have on my desktop. I wish to set the outputs via toggle switches. IF you would be kind enough to furnish me with a schematic I will happily send in a financial contribution to you as payment. Thank you.
reply
Hi Scott ( I assume ) I hope that you will help me in constructing my own simple 4 cell 18650 LI-on power bank. I am puzzled as to how to wire it all up with the between the balance charger and the buck converter. I wish to extract 12vdc, 5vdc, 3vdc, and 1. 5vdc for the testing and running of toys that I have on my desktop. I wish to set the outputs via toggle switches. IF you would be kind enough to furnish me with a schematic I will happily send in a financial contribution to you as payment. Thank you.
reply
Dalton
I'm trying something similar with an Asus machine and it won't accept the power. there is a mosfet IC that needs 24 volts (19 volt supply so how to get that) on the gate pin to allow power into the machine. I sniffed it a little since the charger only has power and ground and turns out that the system uses some kind of 1-wire protocol over power and ground to communicate. couldn't catch it with my cheap scope and lack of scope skills but maybe I'll get something figured out.
reply
I'm trying something similar with an Asus machine and it won't accept the power. there is a mosfet IC that needs 24 volts (19 volt supply so how to get that) on the gate pin to allow power into the machine. I sniffed it a little since the charger only has power and ground and turns out that the system uses some kind of 1-wire protocol over power and ground to communicate. couldn't catch it with my cheap scope and lack of scope skills but maybe I'll get something figured out.
reply
Pierre
Very positive video, i would like to build one for my Asus because I have remove the internal battery, no more battery in the laptop.
1. Can I charge and discharge the battery pack at the same time.
2. Are you using a laptop charger wire to the boost converter to charge the battery pack? Thank you
reply
Very positive video, i would like to build one for my Asus because I have remove the internal battery, no more battery in the laptop.
1. Can I charge and discharge the battery pack at the same time.
2. Are you using a laptop charger wire to the boost converter to charge the battery pack? Thank you
reply
Paul
Great project. But the toggle switch you used gave a lot of problems in my case with a high voltage drop across it even at 1A of current flow and eventually leading to its destruction.
Recommend using a Relay for Switching and controlling that relay with that toggle switch is a good idea
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Great project. But the toggle switch you used gave a lot of problems in my case with a high voltage drop across it even at 1A of current flow and eventually leading to its destruction.
Recommend using a Relay for Switching and controlling that relay with that toggle switch is a good idea
reply
Sat
Thanks bro. I think you could have avoided using buck converter circuit by just using 3S 2P Battery pack and Booster circuit could be used on output of battery section to step up voltage up to apprx. 19. 2V. Pl. reply on my comment if I am wrong
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Thanks bro. I think you could have avoided using buck converter circuit by just using 3S 2P Battery pack and Booster circuit could be used on output of battery section to step up voltage up to apprx. 19. 2V. Pl. reply on my comment if I am wrong
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Jayson
In charging those battery pack in 33. 6V 5A will the 5A current will be separated each cell in series? Like 5A/8s = 0. 62A in each cell in series while having same 0. 62A for all those in parallel? Thanks
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In charging those battery pack in 33. 6V 5A will the 5A current will be separated each cell in series? Like 5A/8s = 0. 62A in each cell in series while having same 0. 62A for all those in parallel? Thanks
reply
TheSurrenderPenguin
Wow. This would charge my laptop 3. 8 times with an estimated efficiency of 80%. This gives me 7 hours of run time. I have a HP EliteBook laptop. It already has a nice run time on 33. 3wh.
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Wow. This would charge my laptop 3. 8 times with an estimated efficiency of 80%. This gives me 7 hours of run time. I have a HP EliteBook laptop. It already has a nice run time on 33. 3wh.
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Pierre
Hi, I'm building a 4s 4p power pack with 4s BMS, I'm also charging it with 16. 4 CV and? CC, please help me find out how many Amp should I put in to charge the the power bank. Thank you
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Hi, I'm building a 4s 4p power pack with 4s BMS, I'm also charging it with 16. 4 CV and? CC, please help me find out how many Amp should I put in to charge the the power bank. Thank you
reply
Henco
Hi Scott is that safe to charge the battery with the buck boost converter since the cells need CC from 4v to 4. 2v? I want to do the same but are not sure if it is recommended
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Hi Scott is that safe to charge the battery with the buck boost converter since the cells need CC from 4v to 4. 2v? I want to do the same but are not sure if it is recommended
reply
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