intelligencezuloo.blogg.se - Inside dewalt 20v battery

We determined that the DeWALT 20V MAX power tools will not operate without either or both of the middle pin.

In order to figure out how the tool operates with the battery, we ripped up a piece of paper to cover the two middle pins. The following photo shows the interface pins on the DEWALT DCF911B 20V MAX 1/2" Impact Wrench.Ĭross referencing it with the battery interface in the previous section, we can see that the power tool interfaces to the TH pin and the C3 pin. It's up to the tool to determine the cutoff point and refuse to work below that."Ĭomments & Discussion > DeWALT 20V MAX Power Tool Pin-Out There is no way that the BMS can cut off current if the pack voltage is low. Note that as reported in "DeWalt 20V Max 3.0Ah Battery Pack Teardown & Analysis" (see "Related Links" section below), "The battery is always connected to the terminals.

B- stands for battery negative terminal.

They are connected to individual battery cells, allowing the charger to charge them evenly.

C1, C2, C3, C4 are terminals used with B+ and B- for battery balancing.

If you have an idea, please share it with us.

TH is the thermistor a temperature-sensitive resistance that enables the tool to cut off the power to save the battery from overheating.

B+ stands for battery positive terminal.The battery packs contains five 3.6v lithium ion power cells that provides 18v and peaks at 20v when charged.Ĭomments & Discussion > DeWALT 20V MAX Battery Pin-Out The DeWALT 20V MAX power tool uses 20-volt lithium ion (Li-Ion) battery packs. DeWALT 20V MAX Power Tools Battery Interface