24V series batteries with 12V charging
24V series batteries with 12V charging
(OP)
How would one be able to continuously use two 12V batteries in series (to create 24V) and also charge with 12V charger?
thinking about automotive application where i'll be using a 24V load and simultaneously charging with 12V. What components and wiring solutions can achieve this?
Thanks!
thinking about automotive application where i'll be using a 24V load and simultaneously charging with 12V. What components and wiring solutions can achieve this?
Thanks!
RE: 24V series batteries with 12V charging
Are you only powering 24 volt items? Simply charge the batteries in series with a 24 volt charger.
If you need to power 12 and 24 volt loads simultaneously you'll need to charge the batteries individually. You can do this using two 12 volt chargers or use an automatic charging relay.
If this is on vehicle you can do this with 12v alternators but one alternator must be isolated ground. This is how the military CUCV trucks do it.
You cannot use a 2 bank charger as they have a common ground
RE: 24V series batteries with 12V charging
this will need to power both 12v and 24v loads. charging will be done via DCDC
RE: 24V series batteries with 12V charging
i've seen these tollbridges which looks like what i want, but it appears that they don't support simultaneous load and charge...uless i'm missunderstanding anything
https://drewcraft.com/product/trollbridge24-combin...
RE: 24V series batteries with 12V charging
Can you give some more details about your application? Are you using an alternator at all? You mentioned automotive. What kind of currents do you expect from each load? Does the charger need to be able to maintain the load continuously?
RE: 24V series batteries with 12V charging
That's basically and DCDC converter that pumps up 12VDC to 24VDC. The device is basically a doubler. Seach the web using keywords "voltage doubler".
RE: 24V series batteries with 12V charging
"It works by automatically putting two 12 volt batteries in series when you need to run the trolling motor and in parallel for charging." from the website.
RE: 24V series batteries with 12V charging
You can switch the charger between batteries as long as the charger output is floating or isolated from ground. Any control system you'd want to build with a 2-pole relay for each battery could do it. Basically, use a relay to disconnect both charger leads from one battery and another relay to connect both charger leads to the other battery. Then, switch back and forth between batteries.
The simplest is to get 2 chargers that have isolated outputs and use one charger for each battery.
Yes, ultimately the chargers have to support the load. They don't have to support the load all the time, but they have to charge the battery more than it's discharged and they have to do it quick enough that an intermittent heavy load doesn't over charge a battery.
RE: 24V series batteries with 12V charging
Two batteries in parallel for 12 Volt loads and 12 Volt charging.
The switch momentarily re-connected the batteries in series for the 24 Volt starter.
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Ohm's law
Not just a good idea;
It's the LAW!
RE: 24V series batteries with 12V charging
Two batteries in parallel for 12 Volt loads and 12 Volt charging.
The switch momentarily re-connected the batteries in series for the 24 Volt starter.
The Delco 11119845 series parallel 24Vcrank-12Vcharge solenoid
RE: 24V series batteries with 12V charging
RE: 24V series batteries with 12V charging
RE: 24V series batteries with 12V charging
RE: 24V series batteries with 12V charging
RE: 24V series batteries with 12V charging
RE: 24V series batteries with 12V charging
RE: 24V series batteries with 12V charging
RE: 24V series batteries with 12V charging
The original question is the point being commented on. With a 12V charger, the batteries won't receive a useful charge.
May not receive a full charge? No useful charging would happen.