Simple charge voltage limiter board

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miuan

10 kW
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Nov 26, 2009
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Slovakia
Just bought this item on Aliexpress, in fact I've been wishing for a similar solution for years:
https://www.aliexpress.com/item/3-7V-120V-CNC-Storage-Battery-Lithium-Battery-Charging-Control-Module-Battery-Switch-Protection-Board/32723941013.html?spm=2114.01020208.0.0.hMuZah
So this little board will let me charge all my 10S, 12S and 20S batteries to my preferred state of charge.
No more messing with timers or building switches to my chargers. I like!
Will post my impressions later when the board arrives from China.
Anyone tried something similar?
 

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Yes please follow up with your experience with this. It looks like it would be a good addition to a bulk charging set up.
The diagram shows 220 VAC input switching to the charger. Would it also work on 110 VAC?
 
Since the relay is rated for DC and AC wide voltage range, I think it will switch just about any source.
After all, it seems the circuit is powered by the battery itself, hence the voltage range starting at 3.7V
 
I presume the the grid voltage220v will be sent to the charger. Looking forward to see that it works, although it would be simple to implement using arduino or microcontroller
 
vex_zg said:
I presume the the grid voltage220v will be sent to the charger. Looking forward to see that it works, although it would be simple to implement using arduino or microcontroller
Click to expand...

Yes. See the layout.
 

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cool. Ordered one.

One not big issue is that BMS might not balance below 4.2V, depends on BMS.
 
vex_zg said:
BMS might not balance below 4.2V, depends on BMS.
Click to expand...

Yeah, most BMS will not balance under 4.2V. But any half-decent battery just doesn't need balancing in every cycle anyway.
This is no replacement for proper charging HVC that actually tapers off current for proper balancing job instead of just cutting off completely.
I will use this for shorter rides that don't require full capacity.
 
Hi guys. Back from holiday, received&tesed my board.
It gets power from the 220V in line.
The battery terminal is just for voltage measurement.
220V out line is switched on when battery voltage lies within the set minimum and maximum limits.
As soon as the voltage exceeds the limit, 220V out line (to charger) will be shut off, and will NOT trigger on after battery voltage drops a bit.
So this little device is priceless not only for charging to a certain SOC, but also for emergency charging of lower cell count battery on a higher voltage charger.
No more messing with timers or staying awake till your charge terminates.
It is small enough to be built into some bigger chargers, but the blue power module is much taller than display and buttons, which makes it hard to control once moved inside a case. I will have to figure out a way to make best use of it.
 
miuan said:
Hi guys. Back from holiday, received&tesed my board.
It gets power from the 220V in line.
The battery terminal is just for voltage measurement.
220V out line is switched on when battery voltage lies within the set minimum and maximum limits.
As soon as the voltage exceeds the limit, 220V out line (to charger) will be shut off, and will NOT trigger on after battery voltage drops a bit.
So this little device is priceless not only for charging to a certain SOC, but also for emergency charging of lower cell count battery on a higher voltage charger.
No more messing with timers or staying awake till your charge terminates.
It is small enough to be built into some bigger chargers, but the blue power module is much taller than display and buttons, which makes it hard to control once moved inside a case. I will have to figure out a way to make best use of it.
Click to expand...

good to know. I still haven't tested mine. I would still use a timer in addition, just as a failsafe. Don't want a fire just because a relay got stuck or something.
 
vex_zg said:
good to know. I still haven't tested mine. I would still use a timer in addition, just as a failsafe. Don't want a fire just because a relay got stuck or something.
Click to expand...

Remember this device already is a failsafe above your charger's HVC. It's highly unlikely for both of them to fail.
 
miuan said:
vex_zg said:
good to know. I still haven't tested mine. I would still use a timer in addition, just as a failsafe. Don't want a fire just because a relay got stuck or something.
Click to expand...

Remember this device already is a failsafe above your charger's HVC. It's highly unlikely for both of them to fail.
Click to expand...

if you are using a real charger - yes. But if you are using a dumb power supply and just use this voltage limiter as means of charge termination - then there are no other fail safes.
 
Has anyone tested this on a 120 volt AC circuit? There are now a bunch of them on EBay but as far as I can determine they all specify 220 VAC.
 
If the charger fails, and the failure mode causes it to keep charging after the battery is already fully-charged...this device will cut power to the charger once the battery reaches the set-point.

This has been needed for a very long time.
 
999zip999 said:
Look at first post 10a 125v 10a 28vdc. The blue square on the bottom. Right next to 220v ac . So what does this truly mean.
Click to expand...
That is the rating of the relay contacts. It will handle 10 amps at various voltages.
My question is; if the device itself is powered from the 220VAC input, is it also capable of operating at 110VAC? I do not see a selector switch.
I may have to buy one to find out.
 
It seems to only be advertised for 220V. I'd love to try that for you, but there is no 110V outlet nearby... We are talking the XH-M602 boards however.
There is a XH-M604 too, and it's fed directly by DC from charger. Instead of charger power, it switches battery connection. It's limited to 80V though.
 
Just ordered XH-M604 from here

http://www.icstation.com/checkout_success.php

will report back on how it goes, in a week...

Google also says its available here: http://www.ebay.com/itm/XH-M604-Charge-Control-Module-DC-6-60V-Battery-Protection-Board-For-Lithium-Lead-/361957157469
 
Thanks, I've gone for the 604 too, I have a few redundant chargers, this is awesome if it works,

Cheers Op
 
Any videos you could post on its usage would be great.

Some of them state that they are "Used for: 12V-24V storage batteries"

http://www.ebay.com/itm/XH-M604-Battery-Charge-Control-Module-DC-6-60V-Protection-Board-for-Automatic-LJ/112487082009?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D2%26asc%3D45727%26meid%3Da64ab76efb414e9ba0e7dc43f059a2a1%26pid%3D100623%26rk%3D1%26rkt%3D6%26sd%3D332130298597&_trksid=p2047675.c100623.m-1

whereas others say up to 60V battery.
 
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