Load Sharing || Use Solar Panel safely with TP4056

In this video, I will show you how you can make a circuit that automatically switches between using the battery power or the input power. It can also save your battery from overcharge, hence preventing a fire hazard.
Pictures and more: www.instructables.com/Load-Sh...
Parts List:
IN:
IRF4905 (1 pcs) - amzn.to/3KYi5tO
IRF4905 (10 pcs) - amzn.to/3KVOuB2
1N5819 - amzn.to/3uPulqI
Float Sensor - amzn.to/3Eo9DBn
TP4056 - amzn.to/3uPKiNK
MT3608 - amzn.to/3uOyQBK
US:
IRF4905 - amzn.to/3EkBnHc
1N5819 - amzn.to/3vnqdgE
Float Sensor - amzn.to/3EjttOh
TP4056 - amzn.to/3KMvnJA
MT3608 - amzn.to/3vo4Eg2
UK:
IRF4905 - amzn.to/3rwWAZn
1N5819 - amzn.to/37TMESC
Float Sensor - amzn.to/3OhylYC
TP4056 - amzn.to/3ry6MAx
MT3608 - amzn.to/3uPKxbC
Some useful links related to Load Sharing:
www.best-microcontroller-proj...
forum.arduino.cc/t/proper-usa...
ww1.microchip.com/downloads/en...
blog.zakkemble.net/a-lithium-...

[@Tesalex]

Addressing the comments with people saying using a solar panel with TP4056 will not be a problem: 1. I would like them to take some time and read the links I have added in the description section saying the exact same thing I am saying in the video. I would have accepted I am wrong, "IF" I was the only one saying that. There are a lot of people saying the same thing in the internet. 2. Something bad didn't happen to your circuit doesn't mean it is safe, or it will never happen. You might get away with using that unsafe circuit and not have a problem in your lifetime, but it is also possible that the conditions are not in your favor just once, and you had a serious issue with your circuit. 3. It can never hurt to be extra safe, especially when working with Li-Ion cells. 4. As one comment is suggesting, I WILL NOT TAKE DOWN THE VIDEO. Even if the circuit for using solar panel with Li-Ion cells is not useful, load sharing is a very useful circuit. Just read the applications of this circuit and you would see what I mean. One example is your laptop, when you battery is completely charged, the laptop is completely running using the power from the charger and not the battery. Even when you remove the charger, it doesn't turn off but runs off of battery. How is that happening? Load sharing! No one knows the effort that goes behind making even a simple KZbin video until you do it. So please don't just come of the blue and ask me to take down the video. Thanks!

[@canadamadman5306]

There is over charge and overdischarge buint into this board. How will this be bad?

[@Treesandguns]

I'm glad lots of other people think this video is nonsense.

[@MakerFabio]

I don t think the 4056 will overcharge over 4.2V, but it will eventually keep it to 4.2 if the lod current is above the termination current. Not even sure if this circuits works correctly in the early morning with low battery level and weak solar panel current. This circuit is usually adopted for wall chargers with a solid 5V input

[@Netsroht72]

I think this is not right, because, even if the Charger dont shut down, because current flows, the Voltage never go above 4.2V. And this is save, all the current goes thrue the Load. This is not a bug, its a feature.

[@Djambo57]

Yeah, the battery wont charge over 4.2V... I'm also against this but I'm trying to find someone who will change my mind haha

[@ucoder8905]

Load sharing is one of the most critical and useful circuits if you are making battery powered things like robots or remote solar powered stations! thank you so much for finally having a video on this.

[@ucoder8905]

Bro. you now have 3.14 K subscribers with me just now. Congrats on the cool number!

[@elektron2kim666]

I have a quite pro device doing the same when it's on in a charging dock. It happens because the load is using higher than the battery charging can catch up to. Charging is much less in general for safety. One can make a project sleep to some degree or crank it up. I don't know if it's relevant in this video. I still learn something. The funny thing is that I didn't expect to learn so much and be forced into caring about power delivery from batteries. It could be easier, but we jumped into those DIY subjects ourselves.

[@RickhCool]

Works just fine. I used IRF9540 MOSFET, SB260 diode and 10K pull down.

[@Leilektsoglou]

As I understand, the load keeps having power when we have sun, right? At what point, the solar panel will stop providing power straight into the load? for example since the solar panel starts providing less than 4V? so after that, the power to the load comes from the TP4056? this circuit is fine if we want to have our esp32 working while the sunshine is maximum?

[@socke4306]

can you do this without pcb only wires?

[@matthewstephenson1664]

This is nonsense. The TP4056 won't charge the cell above 4.2V. Doesn't matter that the rest of the circuit is drawing power - the power isn't going into the cell - it's going to the rest of the circuit. TP4056 will start charging when the cell voltage falls, and stop when it rises to 4.2V again. It's not going to overcharge the cell.

[@loveblue7]

While it won't destroy the battery like you mentioned, there are few benefits of using load sharing, such as 1. The tp4056 (which is a linear charger module, means it wastes all the extra voltage above its output voltage into heats) is always used for power transfer, even if the solar charger could power them directly. This is especially true if we are using any kind of boost converter from the battery to power the load (e.g supplying 5v to load). Using load sharing, you can bypass the tp4056, although a proper voltage regulator should be used to regulate that direct line. 2. It should extend battery life as it doesn't continuously cycle charge-discharge battery at 4V-4.2V like you mentioned. Instead, when solar power is present it will power the load directly and eliminate that battery usage cycle. This video has nice explanation about those benefits. kzbin.info/www/bejne/imiTnnV-mq6CkKM

[@deanagoes2791]

using bms 1s 3 amp max is enough.

[@barryrudolph9542]

It's not nonsense. When the TP4056 goes into constant voltage mode it is looking for the battery current draw to drop below a certain point. It will never see that drop if there is a load connected to the battery.

[@guyincognito.]

@@barryrudolph9542 Charge current drops to zero if it falls below 100ma. TP4056 will then provide only current drawn, so if a 200ma load is drawing current it will supply 200ma at just under 4.2V powering the load and effectively bypassing the cell.

[@nielsnelson3570]

Hello i tried to do the same in Kicad but i've received some Errors and i don't know how to solve it It possible for you to do it in Kicad? or could you please give me tipps to solve the problem in Kicad?

[@MoisesCaster]

Incredible!

[@MrSummitville]

Incredibly s t u p i d ...

[@kycrout]

With apologies, as I'm sure this is a n00b question... What is the value of the pull up resistor.. 10k? Thanks for your information.... Super helpful! @Tesalex

[@jexom]

To those thinking that load sharing is needed because of overcharge protection, it's not the reason. The reason to use load sharing is trickle charging. The out of tp4056 alwaus runs off battery and discharges it which triggers the charger module to recharge the battery which wastes charging cycles. Load sharing prevents that

[@ismail_aydemir_mylife]

By coding with Atiny; I think it requires logic integrated circuits, but without that, can we take the voltage value with an integrated coded in Atiny and tell it to supply it according to percentage values? This is a 4056 integrated circuit, I thought it cut off automatically, maybe I'm wrong?

[@oleganonimka3725]

1:51 I think that the circuit shown here is not complete, unless of course the connected load can accept a wide voltage range: 3V...8V. I think that when the power bypasses the TP4056 board, there should be a decrease in voltage from 4.2V...8V, which can be supplied to the TP4056 board, to the maximum voltage at the output of the TP4056 board, namely 4.2V. In addition, I think that the circuit shown assumes that there is a stable power supply at the input and it may not work properly if it is powered from a solar panel.

[@Madeinoz1967]

Great Job

[@MrSummitville]

Bad job ...

[@thenextproblem8001]

Diode using is 40v 1a as i can see. What if i want to connect 3parallel 18650 or more to charge and want to draw 5a?

[@Tesalex]

Use diode that can handle that much current. 1N5822 can handle 3A. But I think SR560 will suit your needs, it can handle 5A of current.

[@thenextproblem8001]

@@Tesalex thanks mate 👌

[@syedsulaiman8380]

Hey i didn't understand Y u can't directly connect the TP4056 without load sharing Cause TP4056 has over-voltage protection And the battery charging is separated from the output so it won't overcharge the batter

[@axelateon1384]

the dude in the video is crazy he does not know a f about electronics

[@micarifamily1]

Exactly the dw01 on that tp4056 board protects on top of the Mosfet 4056, double protection

[@pakoiot3295]

@@micarifamily1 dw01 protects from 4.3V. When in dw01 is 4,3v then it disconnect mosfet. It dont protect from 4.2V but from 4.3V !

[@christophertadeo6120]

How bout with minimal load like for cellphone charging, is it safe... 🤔

[@MrSummitville]

It is always. Additional Circuit is NOT needed.

[@p4padne]

Good effort...👌👌

[@aungmyokhaing6795]

Please share schematic of all connection on the circuit board.

[@MrSummitville]

Why? It is not needed.

[@The_Unobtainium]

This guy made a video not even reading TP4056 datasheet... Otherwise, he wouldn't be talking nonsense.

[@vijaymadipally2608]

Yes, I was thinking the same.

[@engineerdanny7569]

The main point is using tp4056 with a load, the guy is right ...tp4056 has over and under voltge protection but it advises against charging while connected to a load as tp4056 will not be able to know whether the battery is fully charged or not and will overcharge the battery ..a solution to this is what is described in video ..very useful information indeed

[@hanunhanun2792]

​@@engineerdanny7569 I think TP4056 have auto cut system' when battery was fully charged.

[@steve6375]

@@hanunhanun2792 It only knows it is fully charged when only a small current is drawn but the load will always draw > 100mA and so it will never turn off. Also, it will never start to charge when power is applied because the load will draw all the initial 100mA starting charge current and so full current will never be applied to battery. These units must have the load removed for correct operation of battery charge/discharge. See kzbin.info/www/bejne/aXvbmpeGgbChp7M for workaround using MOSFET, but note that MOSFET Vgs threshold should be approx 2V max and part chosen in the video is spec'd at 4V max so some MOSFET samples may not work correctly as a discharged battery could be at 3V. This video is much better explanation kzbin.info/www/bejne/imiTnnV-mq6CkKM

[@miteshdhanani]

Can't even see properly just showing what is he doing can't even see

[@syaduinotech3681]

I did not able to get the desired result. I am using ur ideas with solar panel. When i off the solar, the output no longer reach the 1v. Did you know why? I want to used your design for my solar powered arduino project. As result the output produce 3-4 v with the existing of solar. When solar not available, the battery not even output 1v.

[@leefurniss]

I had same problem, also when plug it back into usb it starts working again

[@johanjeques]

@@leefurniss Hi, have you managed the solution yet? I kinda worried to do the wiring after reading the comment section

[@leefurniss]

@@johanjeques Hi, sorry no i haven't bothered with it for a while, just check continuity between + & - before you plug in the battery, (don't short circuit the battery) 👍

[@salvatoreiorio1994]

Congrats for the video. I have a question, I don't understand in which phase the battery charging takes place.

[@deanagoes2791]

using bms 1s 3 amp max is enough.

[@user-im1nc8kz2l]

I agree with the first guy you don't know what you're talking about it's the whole point of a protection to protect it from overcharging and undercharging you really need to rethink this video because I'm a novice and immediately knew you were wrong maybe you got a bad board from a careless manufacturer

[@2ndishmum423]

Which country do u live

[@Tesalex]

India

[@oleganonimka3725]

1:06 Most likely, the mentioned problem does not exist at all - someone just made it up. If at the battery connection points, when the battery is not present, the open circuit voltage does not exceed 4.25V, then the described problem will not occur. The battery can be charged to a maximum of this voltage and no more.

[@makerboy-gp2to]

exactly. there are protection in place

[@akhenatn]

or..... you can buy a pt4056 with protection.

[@guyincognito.]

This is incorrect. The TP4056 detects when the cell is almost fully charged and reduces the charge current to zero when it falls below 100ma. If any load is drawn, it supplies only the current drawn by that load keeping the charging voltage just under 4.2V. For example if the TP4056 charges a cell to 4.2V it will drop the charge current to zero. If you then attach a 200ma load, the TP4056 will supply only 200ma, powering the load but not overcharging the cell. This is all in the datasheets and you can verify it yourself easily enough.

[@BannedBetweenTime]

The solution is still feasible though. What he's does isn't incorrect, it's just not mitigating overcharging. However when the sun is flat out it will preferentially draw from solar as opposed to the battery.

[@vj7910]

errors in your specifications not an accurate guide

[@axelateon1384]

you are crazy man read the datasheet first

[@TransRightsMatter]

This video is completely wrong

[@Chris-jf9dv]

No - the TP4056 DOES have a charge protection and will never go beyond 4.2V so everyone is safe.