Pinout diagrams highlight all the important wiring of a battery and its layout. That’s why they’re so helpful. Anyone who wants to work on a battery can use them for reference.
It’s tough finding a pinout diagram for specific batteries, though. That’s why I’ve been focusing on them lately, and today I’ll cover a pinout diagram for the wiring on a 20v Black and Decker battery!
Black and Decker Battery Wiring Diagram Pinout
Getting right into it, here’s what the pinout diagram for a 20v Black and Decker battery looks like. If you don’t know what the symbols mean, don’t worry as I’ll cover them in detail later.
For anyone new to battery pinout diagrams, the symbols probably don’t make a lot of sense. So, here’s a rundown of them all and what they stand for in terms of the battery:
GND: The “GND” at the very top of the diagram stands for “ground”. In electrical circuits, “ground” is usually a way to refer to the zero-voltage reference point.
Connecting the negative terminal to this terminal in a system with multiple components guarantees a safe and predictable return path for the current in the battery.
B-: This symbol marks the location of the negative terminal on a Black and Decker 20v battery. It’s one of the main terminals and connection points of the battery itself.
The negative terminal plays a huge role in the flow of current within the battery. It sends electrons to the positive terminal.
B+: This symbol marks the location of the positive terminal instead, which is why it looks so similar to the last one. Its role is similar to the negative terminal, but the function is different.
While both terminals help with the flow of current, the positive terminal doesn’t push electrons elsewhere. Instead, it is the destination point for electrons sent by the negative terminal.
Related: How to Do Black and Decker Battery Reset: Methods
C#: The “C#”s in the diagram symbolize the capacitors. Capacitors are terminals used in a series with the B+ and the B- for battery balancing and regulation.
Each of these is given a number, as there are multiple of them throughout the battery.
ID: This symbol is for an identifier assigned to electric components for reference when repairs or modifications are required.
In other words, it helps identify the components compatible with the battery.
R#: The “R#”s in the diagram symbolize the resistors in the battery. Just like the capacitors, each resistor is numbered to differentiate it from the others.
These components regulate the flow of electrical current across the circuit board to carry a specific voltage to the transistors.
TH: This logo is for the thermistor on a Black and Decker 20v battery.
Thermistors are temperature-dependent resistors which react to fluctuations in temperature to change the resistance against a current’s flow. They are used to prevent overheating.
: The symbol beside this, which you can also see in the earlier diagram, is meant to represent each of the cell batteries.
Inside The Black and Decker 20v Battery Adapter
With the pinout diagram covered in full detail, some final things I want to share have to do with the circuit board. The battery adapter contains a PCB circuit board.
That board has a series of 5 resistors wired together. Among these, the B- pin is paired with the C3 pin through R3.
The B+ pin is paired with the C4 pin through R4. And finally, the TH pin is wired to the C1 and C2 pins through R1 and R2.
The voltages on the circuit board are:
- Positive terminal and negative terminal = 18V – 20V
- C2 and negative terminal = ∼10V – 12V
- C4 and negative terminal = ∼3V – 4V
- C1 and negative terminal = ∼14V – 16V
- C3 and negative terminal = ∼6V – 8V
