Doctorbass
100 GW
Many people was waiting for that:
I found that link where someone had unpotted the BMS of the dewalt pack and reversed engineered the BMS circuit!!
Source by Ruddman430 on rcgroup forum
Alot of details concerning charging using the DC9000 cahrger and the way to use some pins of the BMS to control the output pin!
a brief snapshot:
http://www.rcgroups.com/forums/showthread.php?p=6273388#post6273388
There are two different ways to draw power from the battery through the module. The lone spade connector is the positive terminal, and is directly connected to the battery positive terminal. The outer of the paired spade connectors connects to the battery negative terminal through a surface-mount 15 amp fuse. The inner spade connector sends current through a large MOSFET and a current-sense resistor, then to the battery negative terminal.
The module contains two custom ICs: one appears to be an integrated 10-cell balancer, while the other appears to be a microcontroller. Thus, it looks like the module should be able to perform almost any battery-management task, so long as the inner spade terminal is used. Certainly, it is equipped to provide over-discharge protection and current limiting. Heck, DeWalt could even use the FET in the battery module as an ESC for the power tool, though they do not appear to do so. However, the circuitry is not powered unless some of the signal terminals are connected, so don't expect the electronics to do anything unless you use the proper charger and proper power tools. (Or unless someone reverse-engineers that interface...) With the electronics inactive, the only way to draw power through the module is through a hard-wired fuse - draw more than 15 A and the fuse blows, rendering the module useless.
-Bryan Ruddy
Ministry of Bad Ideas Combat Robotics
Made with one N-channel 60V, 80A, 3.8mΩ Mosfet... to control the output of the battery. hummmm very similat to the C-lyte controller :wink:
Doc 8)
I found that link where someone had unpotted the BMS of the dewalt pack and reversed engineered the BMS circuit!!
Source by Ruddman430 on rcgroup forum
Alot of details concerning charging using the DC9000 cahrger and the way to use some pins of the BMS to control the output pin!
a brief snapshot:
http://www.rcgroups.com/forums/showthread.php?p=6273388#post6273388
There are two different ways to draw power from the battery through the module. The lone spade connector is the positive terminal, and is directly connected to the battery positive terminal. The outer of the paired spade connectors connects to the battery negative terminal through a surface-mount 15 amp fuse. The inner spade connector sends current through a large MOSFET and a current-sense resistor, then to the battery negative terminal.
The module contains two custom ICs: one appears to be an integrated 10-cell balancer, while the other appears to be a microcontroller. Thus, it looks like the module should be able to perform almost any battery-management task, so long as the inner spade terminal is used. Certainly, it is equipped to provide over-discharge protection and current limiting. Heck, DeWalt could even use the FET in the battery module as an ESC for the power tool, though they do not appear to do so. However, the circuitry is not powered unless some of the signal terminals are connected, so don't expect the electronics to do anything unless you use the proper charger and proper power tools. (Or unless someone reverse-engineers that interface...) With the electronics inactive, the only way to draw power through the module is through a hard-wired fuse - draw more than 15 A and the fuse blows, rendering the module useless.
-Bryan Ruddy
Ministry of Bad Ideas Combat Robotics
Made with one N-channel 60V, 80A, 3.8mΩ Mosfet... to control the output of the battery. hummmm very similat to the C-lyte controller :wink:
Doc 8)
