Перейти к основному содержанию

Learn about the skills that you might need to work on your device.

87вопросов Показать все

Ryobi 40v reset/reprogram

I am trying to revive a next gen 6.0 AH and a 7.5 AH as someone mentioned before the pack will bleed if a under volt condition is met. This is true, it will bleed the pack through a parallel pair of 750 OHM resistors coming to around 375 ohms, you can see them in Rosrooster's picture. The PCB's and controllers on these units are identical with the 6.0 missing two of the FETs. The 30 leg is a Texas instruments BQ7693003, it's companion controller is unidentifiable but markings are (Top) 824j. (Middle) 92 04, (Bottom) 20511A. It must be TTI proprietary, but the condition I stand at is that I've desoldered the bleed down resistors and charged pack to 42v and as soon as I drop those resistors on it resumes bleeding down. Read through the 63 page datasheet file for the TI BQ76930 and it states it will remain clamped high on a discharge circuit until cleared by the host, batteries appears to have two serial wire debug ports. Both these 6.0 and 7.5 have these resistors and do the same thing. As soon as I begin sending voltage directly to the 40v pack the resistors on both begin to heat. I know my way around flashing a bios chip but this is a whole new level for me, this is like tampering with a brick of C4.

Block Image

Ответ на этот вопрос У меня та же проблема

Это хороший вопрос?

Оценка 0
Добавить комментарий

1 ответ

I should probably stay in my lane as you are way more experienced than me. I may have missed it, but what voltage and amperage are you sending to it? I am new at this and working on the same batteries. I was considering getting a 60VDC variable power supply and adjusting the voltage and amps to a trickle charge after doing a reset of the battery. Would this reduce the heat generation on the resisters? Also, I have not looked at the circuitry but only reason I can think to have bleed down resistors (besides to make it fail sooner) would be for overcharge purposes. Could the bleed somehow be stopped by the circuitry when the battery has been discharged to like 38.5VDC as an example?

Был ли этот ответ полезен?

Оценка 0
Добавить комментарий

Добавьте свой ответ

Steven W будет вечно благодарен.
Просмотр статистики:

За последние 24часов: 4

За последние 7 дней: 22

За последние 30 дней: 58

За всё время: 341