Test 12volt battery

[stevemgevcom]

any one know the parameters for testing the 12 volt battery?
mg head office dont know, mg service dont know. chorley havent replied to the message i sent from their web site

need to the type of battery Standard, AGM, GEl or EFB

AND

the testing standard, CCA, IEC, SAE, EN, DIN or CA

 

[Jomarkh]

What do the AA or RAC do to test a battery?
What issues are you having?

 

[stevemgevcom]

What do the AA or RAC do to test a battery?
What issues are you having?

they probably use a battery tester like mine, but unlike the rac or aa i can not read the chinese info on the battery, dont suppose they can either, can you?

no issues, but its three years old and i want to know its soc & soh, as all the car shows is the voltage, which i can do with my tester but i need to enter the type of battery and the testing standards into the tester so it can do its work correctly

 

[JohnV6]

Can't you look on a battery supplier site like Tanya against your reg . For my zs ev they show a type 27 AGM

 

[Lovemyev]

Tbh - Not even the top end 12 volt battery testers, can’t give a definitive 100% accurate answer on the ability to charge and more importantly store and retain energy when the car is not in use.
Battery testers can be fooled into reporting a really good SOH in error.
12 volt batteries are very clever but in field of disguising their honest condition.
You charge them, leave a while and then test them, the tester reports 100% SOH.
But can it retain that stored energy over a long period of non use ?.

 

[t509triumph]

If you want to read the Chinese writing... use Google translate. Point your camera at the writing... and Hey Presto! You can read Chinese

 

[Gomev]

Can't you look on a battery supplier site like Tanya against your reg . For my zs ev they show a type 27 AGM

Tayna.

 

[stevemgevcom]

Can't you look on a battery supplier site like Tanya against your reg . For my zs ev they show a type 27 AGM

thanks will give it a try

Tbh - Not even the top end 12 volt battery testers, can’t give a definitive 100% accurate answer on the ability to charge and more importantly store and retain energy when the car is not in use.
Battery testers can be fooled into reporting a really good SOH in error.
12 volt batteries are very clever but in field of disguising their honest condition.
You charge them, leave a while and then test them, the tester reports 100% SOH.
But can it retain that stored energy over a long period of non use ?.

not interested in a 100% accurate answer, just want to to knw when it needs replacing before it lets me down.

If you want to read the Chinese writing... use Google translate. Point your camera at the writing... and Hey Presto! You can read Chinese

good idea will give it a try, but there must be an easier way, like say some one at MG knowing the answer, oh no tried that MG = muddled granny

 

[decrep]

The standard automotive test is CCA cold cranking current. that's what you need for a starter motor.
Not appropriate for an EV battery and it could damage it, don't let anybody do that.

The only way I can think of testing it, is to fully charge it, then discharge it at a known medium rate and see how long it takes.

I guess it's possible you wouldn't need to fully discharge it, if the battery voltage is an accurate indication of charge state, you could monitor voltage over time.

There is this chart for a gel battery

I have a spare 36a/h battery lying around, it would be interesting to know it's health.
I'll see if I can make any sense out of it.

 

[stevemgevcom]

thanks, I have a 12v battery tester which probably does it the same way as in your chart.

i have to input certain parameters based on the type of battery, say agm as the first paremeter, EN as the second parameter and the a number from a chart in the instructions for the aH rate, then connect it to the battery and press test, giving a result of the soh, soc, and the edc

go a buy a tester only 20-30 quid to check your calculations