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Marvin
(@marvin-1989)
New Member Customer

Hello,

 

I tried to get a bit further with the Makita stuff. I thought I replied last week but most likely forgot to push the add reply button.

From what I found that only 4 pads are connected; 3 signals are interesting, I investigated a Chinese BMS board, that has as little as needed connections 😉

 

If you look in the "open" side of the yellow connector, the numbers are:

1, 2, 3, 4, 5, 6, 7

 

D1 = pin 2 

D3 = pin 4

D4= pin 6

Pin 7 = GND?

 

Below is a snapshot from a "logic" analyzer:

Knipsel Makita

After the yellow marking, the charger stops charging and reports a fault by blinking red/green.

 

Because this is analysed with the cheap Chinese BMS, I'm going to open a working Makita battery and probe these three pins again. See what is happening there..

ReplyQuote
Posted : 23/08/2022 6:55 pm
dreamcat4
(@dreamcat4)
New Member
Posted by: @marvin-1989

I investigated a Chinese BMS board, that has

Because this is analysed with the cheap Chinese BMS, I'm going to open a working Makita battery and probe these three pins again. See what is happening there..

Hi Marvin,

Can you please specify which chinese BMS pcb were you referring to here? The smaller one or the larger one? Many thanks

ReplyQuote
Posted : 04/09/2022 4:45 pm
ahin1234
(@ahin1234)
New Member Customer

Hi, can you inform back which IC is used for the Balancer in this Makita Battery? Is the the ML 5203? 

ReplyQuote
Posted : 11/10/2022 6:21 am
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