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battery reverse protection ckt

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darla1

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reverse protection

hi all

can anybody have low cost battery reverse protection circuits for battery charger

thanks
darla
 

battery reverse protection circuit

darla1 said:
hi all

can anybody have low cost battery reverse protection circuits for battery charger

thanks
darla
Click to expand...
Very simple. Make the connecting pins of totally different diameter , so that reverse plugging becomes impossible. secondly for low capacity batteries there can be a shunt diode with a fuse in series path. one can use a series diode, but it causes drop of voltage to load.

Sarma
 

battery reverse protection

DEAR MR MVS SARMA

i did not get first one....second one i understood..

the battery i am talking about 100AH lead acid battery..

can you explain more detail first methos

thank you very much
 

battery reverse connection protection

darla1 said:
DEAR MR MVS SARMA
i did not get first one....second one i understood..
the battery i am talking about 100AH lead acid battery..
can you explain more detail first methods
thank you very much
Click to expand...

the size of positive and Negative connectors is different, in case you are using automobile battery.
Please indicate the make and model number of battery so that exact point could be elaborated.
 

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    darla1

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protection ckt for relays

thank you very Mr sharma sir

for your information i am not providing any connectors for battery,..i need to leave the +ve and -ve wires to connect battery for HOME UPS application...

user has to connect the battery terminal to battery

thanks
 

battery terminals reverse-connect

Hai friends. Try this reverse battery protection. For heavy loads the relay need to be used with the correct capacity. The terminals marked as "charger" can be given to charger or load. In case of reverse polarity, the relay energises and the load or the charger get cut off from the battrey.
 

protection ckt for battery

i fear that this element of circuit would check the battery connection polarity with reference to coil but NOT with reference to the charger voltage, that we more to be specific of.

Sarma
 

reverse connection battery terminals

With a normally closed contactor, the rectifier in the charger would be most likely distroyed before the relay can open the circuit. Additionally, it's contacts may be distroyed by the switching arc, too. The circuit should be redesigned using a normally open contactor.
The situation would be different, if the charger provides some current limiting in reversed state.
 
reverse battery protection

Hello Friends
Polarity protection may also be implimented with a nice IC from Maxim, without using relays or diodes.
 

battery reverse polority protection circuit




Try this
 

relay reverse polarity protection

this is without error !!




6 * F
 

reverse protection circuit

thank you very much all
 

The problem with the circuit above is that when the battery has been connected once the charger voltage comes to the battery terminals.

Now if the battery is removed the relay is still on.

so in on condition if the battery is changed and connected in reverse this system fails.

Let me know of any other system which in which battery can be changed even in ON conditions

Thanks
 

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