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by **[email protected]** on Sat Aug 28, 2010 3:08 am

Externet wrote:Hi.
To 'control' charging of automobile batteries you need to 'control' the voltage to 13.8V at each 12V battery. No other controls are needed in secondary or primary sides other than on/off switches.

For a multiple 12V battery bank; the simplest solution is to use one SMPS each connected to each battery, each regulated to 13.8V
As the secondaries of SMPS are isolated, all can be left connected to their corresponding battery and energized the primaries when charging is desired.
Using a single 55V DC to recharge the 4 series batteries cannot guarantee a better uniform charging.

Code: Select all
(+48V)---------(+)BAT1(-) ----------(+)BAT2(-)---------(+)BAT3(-)----------(+)BAT4(-)---------(-) |--CH1--| |--CH2--| |--CH3--| |--CH4--| ./ ./ ./ ./ 120VAC---------------|-------------------|-------------------|-----------------|

CH1,... means charger1,...SMPS

Miguel

by **Externet** on Thu Dec 31, 2009 6:14 pm

Hi.
To 'control' charging of automobile batteries you need to 'control' the voltage to 13.8V at each 12V battery. No other controls are needed in secondary or primary sides other than on/off switches.

For a multiple 12V battery bank; the simplest solution is to use one SMPS each connected to each battery, each regulated to 13.8V
As the secondaries of SMPS are isolated, all can be left connected to their corresponding battery and energized the primaries when charging is desired.
Using a single 55V DC to recharge the 4 series batteries cannot guarantee a better uniform charging.

Code: Select all: (+48V)---------(+)BAT1(-) ----------(+)BAT2(-)---------(+)BAT3(-)----------(+)BAT4(-)---------(-) |--CH1--| |--CH2--| |--CH3--| |--CH4--| ./ ./ ./ ./ 120VAC---------------|-------------------|-------------------|-----------------|

CH1,... means charger1,...SMPS

Miguel

by **josji** on Mon Oct 12, 2009 4:07 pm

Deepak wrote:Hi all,

I am trying to built a automatic car battery charge controller circuit. I have seen many types of controller circuit which controls the battery charging from the secondary winding of the charging transformer. Controlling the charging from the secondary windings will require large heat sink, heavy amperage SCRs and bulky components. In order to avoid such bulkiness i want to make a controller which would control the charging voltage from the primary winding of the charging transformer. If anyone could provide me relavant URL for this having schematic diagram it will be of great help.

Further these days i have heard about the SMPS battery charger as well. Please provide me the link of its circuit diagram if anybody has seen it.

Thanks in advance.

Deepak

by **[email protected]** on Mon Feb 06, 2006 12:01 pm

Hello,
Mostly all batter charger is based on a step down transformer like 220V to 12V, 24V etc. or a special type transformer which have 6 to 7 primary winding, but it is a difficult to calculate and so costly to make a single transformer and other type is simply step down transformer with brigde rectifier and a series reisitance for v & A contolle, but its not a easy way to control secandory current, So that we have another option to control primary V & A with add a series Fan regulator. It's circuit based on TRIAC which can control about 500 W approx. But remember it's not a fully automatic battery charger. So try this circuit and reply your problem or success story

by **ejagdeep** on Mon Feb 06, 2006 12:01 pm

Hello,
Mostly all batter charger is based on a step down transformer like 220V to 12V, 24V etc. or a special type transformer which have 6 to 7 primary winding, but it is a difficult to calculate and so costly to make a single transformer and other type is simply step down transformer with brigde rectifier and a series reisitance for v & A contolle, but its not a easy way to control secandory current, So that we have another option to control primary V & A with add a series Fan regulator. It's circuit based on TRIAC which can control about 500 W approx. But remember it's not a fully automatic battery charger. So try this circuit and reply your problem or success story

by **Deepak** on Sun Jan 16, 2005 12:57 pm

Hi all,

I am trying to built a automatic car battery charge controller circuit. I have seen many types of controller circuit which controls the battery charging from the secondary winding of the charging transformer. Controlling the charging from the secondary windings will require large heat sink, heavy amperage SCRs and bulky components. In order to avoid such bulkiness i want to make a controller which would control the charging voltage from the primary winding of the charging transformer. If anyone could provide me relavant URL for this having schematic diagram it will be of great help.

Further these days i have heard about the SMPS battery charger as well. Please provide me the link of its circuit diagram if anybody has seen it.

Thanks in advance.

Deepak

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