Simple charge voltage limiter board

Batteries, Chargers, and Battery Management Systems.
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miuan
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Simple charge voltage limiter board

Post by miuan » Apr 10, 2017 6:52 am

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-12 ... 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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Hwy89
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Re: Simple charge voltage limiter board

Post by Hwy89 » Apr 10, 2017 8:56 am

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?

miuan
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Re: Simple charge voltage limiter board

Post by miuan » Apr 10, 2017 3:33 pm

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

vex_zg
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Re: Simple charge voltage limiter board

Post by vex_zg » Apr 11, 2017 4:02 pm

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

miuan
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Re: Simple charge voltage limiter board

Post by miuan » Apr 12, 2017 2:05 am

vex_zg wrote: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
Yes. See the layout.
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vex_zg
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Re: Simple charge voltage limiter board

Post by vex_zg » Apr 12, 2017 2:25 am

cool. Ordered one.

One not big issue is that BMS might not balance below 4.2V, depends on BMS.

miuan
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Re: Simple charge voltage limiter board

Post by miuan » Apr 12, 2017 2:40 am

vex_zg wrote:BMS might not balance below 4.2V, depends on BMS.
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.

miuan
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Re: Simple charge voltage limiter board

Post by miuan » May 09, 2017 4:02 am

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.

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Re: Simple charge voltage limiter board

Post by vex_zg » May 09, 2017 6:44 am

miuan wrote: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.
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.

miuan
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Re: Simple charge voltage limiter board

Post by miuan » May 09, 2017 7:57 am

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

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Re: Simple charge voltage limiter board

Post by vex_zg » May 12, 2017 12:56 am

miuan wrote:
vex_zg wrote: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.
Remember this device already is a failsafe above your charger's HVC. It's highly unlikely for both of them to fail.
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.

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Hwy89
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Re: Simple charge voltage limiter board

Post by Hwy89 » Jun 27, 2017 11:34 am

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.

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Re: Simple charge voltage limiter board

Post by 999zip999 » Jun 27, 2017 8:30 pm

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.

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spinningmagnets
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Re: Simple charge voltage limiter board

Post by spinningmagnets » Jun 27, 2017 8:40 pm

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.

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Hwy89
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Re: Simple charge voltage limiter board

Post by Hwy89 » Jun 27, 2017 11:12 pm

999zip999 wrote: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.
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.

miuan
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Re: Simple charge voltage limiter board

Post by miuan » Jun 28, 2017 2:19 am

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.
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spinningmagnets
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Re: Simple charge voltage limiter board

Post by spinningmagnets » Jun 30, 2017 6:43 am

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- ... 1957157469

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mxer
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Re: Simple charge voltage limiter board

Post by mxer » Jun 30, 2017 2:38 pm

Thanks, I've gone for the 604 too, I have a few redundant chargers, this is awesome if it works,

Cheers Op

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mxer
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Re: Simple charge voltage limiter board

Post by mxer » Jul 14, 2017 8:04 am

Received my m604 this morning x2. Going to do some test later, thanks

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Re: Simple charge voltage limiter board

Post by Telemachus » Aug 25, 2017 9:29 am

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 ... 100623.m-1

whereas others say up to 60V battery.

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