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What do each of these pins do?

Legolessed
By Legolessed
in Hobby Electronics
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These are the battery prongs on my hp 810 revolve. What isrhe function of each prong? Is it a blance plug? Thanks!

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I think your best bet would be to source a diagram for the laptop

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docking connector if I am not mistaken 

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 @gdrriley that wouldve been a guess on my part thats why I didnt say anything 

never let fear stand in the way of your terror. 

 

                                                    If you like anything I write feel free to quote and pass it on

 

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2 pins are a bit longer. They are most likely GND.

2 pins will be used for the positive terminal of the battery.

The battery has some build in protection and communicate with the system on the SMBus (http://smbus.org/specs/), this requires 2 pins.

Still 2 pins left.....

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Probably  Voltage , i2c/spi data  , i2c/spi clock , overcurrent protection , thermal sensor (to kill charging if battery reports it overheats, or to shut off if battery shorts inside overheating itself), ground

 

best bet ... find service manual / schematics for the laptop. If you can't find one, find a laptop that uses same battery or same connector and look up that laptop's schematic... though not much help if you don't know how to read such schematics

 

For example, i couldn't find schematic for 810 revolve, but i did find one for ProBook 4410s which uses a 47wh 6 cell battery and seems to use a 6 pin connector - could be wrong, may not be the same connector .. anyway... had service manual for that :

 

battery.png.74dade4112a18c7fefe843103209d0fb.png

 

so you see first pin is thick and labels say VBAT so that's the battery voltage. Pin 6 is connected together with G1 and G2 pins (probably metal bits of the connector itself) so it's a ground pin. Pin 5 goes to some EMI protection but from the trace also goes somewhere which says THM_MAIN which may be short for thermomether.

Pins 2 and 3 go to something and they're called SDA and SCL which is short for Serial DATA and Serial CLOCK, two common notations for i2c or SPI transfers. Most likely those are the two wires through which the laptop communicates with the protection chip inside the battery.

 

Again, your battery could be different, your battery connector could be different.

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