Hello,
I have a 6V 12Ah SLA battery that is in series with two 5 ohm 1W resisters to make it intrinsically safe. However, this causes a problem for charging. I am not able to use a normal battery charger as it will not detect when the battery voltage has reached the correct point to shut down or switch to the float charge. Do any of you have any ideas that I could try to build my own battery charger. I have attached the circuit I am currently working with, but it is not charging the battery fast enough to begin with. I am only getting about 7.5V (To account for voltage drop across the resisters) and about 300mA. I would like to charge the battery at about 1A until it reaches 6V then reduce down to about the 300mA. Any advice would be greatly appreciated, thanks.
I have a 6V 12Ah SLA battery that is in series with two 5 ohm 1W resisters to make it intrinsically safe. However, this causes a problem for charging. I am not able to use a normal battery charger as it will not detect when the battery voltage has reached the correct point to shut down or switch to the float charge. Do any of you have any ideas that I could try to build my own battery charger. I have attached the circuit I am currently working with, but it is not charging the battery fast enough to begin with. I am only getting about 7.5V (To account for voltage drop across the resisters) and about 300mA. I would like to charge the battery at about 1A until it reaches 6V then reduce down to about the 300mA. Any advice would be greatly appreciated, thanks.
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