Charger Diagram for 12V 800A 100Ah Gel/AGM Battery: Seeking Recommendations

Question

Hello, I am looking for a charger diagram for gel batteries / AGM 12V 800A 100Ah I have not found such a powerful charger. Thank you in advance for your advice

xury · Answer

The gel battery is also a lead-acid battery, so charge it with a suitable rectifier.

Rzuuf · Answer

Self-charging of acid batteries does not exceed 1% per day, which for a 100Ah battery means about 40mA.
This means that, theoretically, any charger with a capacity greater than 40mA is able to charge such a battery - of course in a sufficiently long time.
With a 1A charger, you can charge this battery after approx. 100 hours (not including the efficiency of the charging process), and with a 5A charger - after approx. 20 hours of charging.
The full charge is demonstrated by reaching the end of charge voltage: 13.8 ... 14.4V (for a 12V battery).
DO NOT exceed 14.4V, as this may damage the battery.

kkknc · Answer

Loaders full. You just have to specify the type of work. Charging time. And whether you care about capacity or durability.

aksakal · Answer

Rectifier diagram for battery charging. The maximum charging current is limited by the capabilities of the transformer (power), diodes and thyristors ( electricity ) . Defense against incorrect polarity and short circuit.

kowal242 · Answer

Will the charger like in the scheme above be suitable for such large battery capacities ?? I also mean not too long charging time, i.e. 24h max. Does he also have automatic current regulation ??

aksakal · Answer

Mate, kowal242! In the first - what you mean - automatic current regulation. In the second - I think I wrote understandably - The maximum charging current is limited by the possibilities of the transformer, diodes and thyristors. If you need a 10A charging current - use a transformer for the rectifier, a secondary winding which at a voltage of 18 - 20 V can protect a current of 10 - 12 A, diodes and thyristors for a current of not less than 15A. At the same time, the diagram can protect the thyristor control that exceeds 80 - 100A.

kowal242 · Answer

'' Automatic intensity control '' I meant versatility for different battery capacities so that I could only connect to the battery and do not have to set any parameters. 10A in my case is completely enough, i.e. the system with the attachments above will work

aksakal · Answer

The diagram only protects the manual adjustment of the charging current. Sure, if you know the rectifier scheme that meets your requirements, then you will quickly disappear the thought of implementing such a project. It is easier and cheaper to buy a finished product.