Reviving Makita BL1830 & 1430 Series Li-Ion Packs: Seeking Solutions for Battery Error

Battery plates with a full balancer and a fairly decent 4-LED status indicator are now available on Ali.

Example:

Hello.
To complement the topic, I suggest reading this link

https://www.laptopu.ro/community/power-tools-battery-pinout/makita/

Futek2

This is what I did too, the balancer connector fits perfectly in the battery before the charging connector, just cut out a 2.8x8mm rectangle. There's a video online of a guy doing exactly that.
The Chinese guy has a board for the Makita with a full balancer (not detecting the weakest cell) but you have to give not £15 but £70 for that. And from there (adding branded cells) close to the original.
PS This Romanian link adds little....

Hi kol kotbury .
Thanks for the reply but I found something like this today.
Maybe it brings something new to the topic, it would be about the change in the proc.

https://github.com/mnh-jansson/78k0-flash-utility


https://hackaday.com/tag/makita/

https://martinjansson.netlify.app/posts/makita-battery-post-1

And this is such an addition to the change in the charger

https://github.com/Real-Time-Kodi/MakitaJukebox


Maybe it is worth reading.
I do not have such a problem so far, but it may happen to me because the topic is interesting.

Best regards.
Futek2

For now, it's worked out how to dump the NEC's memory (and not all of it) and possibly punch in (using a block addressing hook) their batch chunks. But there is still a long way to go to work out the actual firmware (maybe some microcontroller einstein in the comfort of his home lab has already done it, but knowledge costs money...). . The Chinese probably got around this by using a status recorder to read the communication between the battery, the device and the charger, and then made his own BMS firmware on his proc that copies the behaviour of the original.
And this "hack" of the charger - well sorry - put a processor music box instead of the original? What for? The bang in the original or the better Chinese ones is annoying enough anyway.... cy.

Hi kol kotbury .
That's pretty much how you and I got interested in the topic, me more secondary.
But I think, that after these descriptions, it could be easier to get around the topic by making e.g. an additional button on the charger, which would start charging such a supposedly unusable battery. But what the guy did by changing the music, maybe it would be possible to get around this by adding some CMOS to the charger, making a simple logic circuit triggered by a button additionally built into the charger. It is a lot of electronics, but it could easily be circumvented. You are a good professional, so maybe it would be feasible as a low-cost solution.
I could only get involved in the subject of the charger diagram. Because I know only from photos and these descriptions.
Be dissolving battery packs to mount a second battery control module.
What do you think of this idea.
Maybe people who know a little bit about electronics could do it.
I think it would be feasible.
Because having read the program code in PY.
I can imagine what can be sent from the CPU in the battery.
Especially that the processor in the battery only sends data after inserting it into the charger, because it must receive a voltage of 5V to supply.
And for the more advanced, it could be suggested to mount a normal BMS to only control charging, but whether it will fit in the battery casing.

Kind regards.
Futek2

Unfortunately, I'm not a good enough programmer to grasp this (I have an idea of the machine code of PIC and AVR processors, high-level languages are "unknown land" to me).
On a daily basis, I take shortcuts and buy pre-made balancers for 30-40zl on Ali, and one of the batteries, remanufactured on original cells (Sony/Murata VTC6) I retrofitted, as I wrote earlier - for more accurate balancing every now and then (Chinese balancers mostly have only cell voltage control and turn off charging when detecting the first fully charged cell, I think mortison balancers have an active balancer, but I haven't tried it yet) in a standard model balancer socket (fits perfectly behind the factory one and the charging cube) and I "service" charge with an Imax B6 model charger.

Hello .
This prpon digest it is on ESP8266 .
https://github.com/mnh-jansson/open-battery-information/tree/main

Already partly done that will be able to do with the phone what you want .
Greetings
Futek2

You need to buy a charging control board from the BMS https://allegro.pl/oferta/bms-modul-elektornika-pcb-do-makita-1830-1840-1850-1860-14410896497

I think the classic BMS is missing here - you don't see 5 transistors controlling the charging of each battery section individually. The circuit that is most often mounted on these boards by itself catches the highest charged cell or the lowest discharged cell when working in the machine. If it were retrofitted with transistor keys - then we have a full BMS.
Anyway, there is no overcurrent protection in sight, nor even any fuse (except for a thermistor on the cables). So, at best, the battery processor communicating with the charger via the charger controls the charging, and the controller built into the machine does the overload protection.
In fact, it is not clear what and how the main battery processor controls it, apart from fooling the charger that "I am a Makita battery", which is why I have the connectors of a classic model balancer/charger built into non-original batteries and use it to balance the cells from time to time.

.

So what, this one is probably better

https://allegro.pl/oferta/nowa-obudowa-baterii-18650-do-makita-18v-z-plytka-13903096027

Of course better, but on Ali the same one stands for up to £50.
E.g. : https://pl.aliexpress.com/i/1005004338399094.html

Guy has found himself a good source of income....

I use one myself : https://pl.aliexpress.com/item/1005004831993985.html - it has a more convenient configuration for me under the tin (and red LEDs - almost like the original )
I also used to take the versions with active overload protection (those mentioned above have only active charging protection and there is only a polymer fuse at the output), but I had to add extra measuring resistors to increase the cut-off current, because otherwise the battery would shut down before the protection in the machine was triggered and circuses would ensue. Anyway, all Makita machines have overload protection built into the controllers and putting one in the battery only makes sense if you are using it via an adapter with some primitive machine from another manufacturer.