Electronic Connections in Battery and Analog Systems

Electrical connection

The intentional joining of two conductors allowing current to flow reliably.

Low-resistance path

A connection that minimizes voltage drop and power loss.

Voltage drop formula

$V_{drop} = I \times R$; represents the voltage loss across a resistive element.

Heating due to resistance

Calculated by $P_{loss} = I^2 \times R$; represents power lost as heat due to resistance.

Characteristics of a good connection

Low contact resistance, repeatable quality, mechanically secure, environmentally robust, and appropriate for the signal type.

Cold solder joint

A solder joint that did not properly wet the pad or lead, often due to inadequate heat or contamination.

Corrosion and fretting

Oxide layers formed due to moisture or micro-motion that increase resistance in connections.

Crimped connection

A mechanical connection created by compressing a terminal barrel around a wire.

Screw and stud terminals

Connections that maintain contact through mechanical pressure, useful for high-current serviceable connections.

Spring terminals

Connections that use spring force to clamp conductors quickly without torque tools.

IDC connections

Insulation displacement connections that pierce insulation to contact the conductor for fast termination.

PCB traces

Copper pathways on a PCB used for routing electrical signals.

ESD (Electrostatic discharge)

The sudden transfer of electric charge between objects at different electric potentials.

TVS diodes

Transient voltage suppression diodes used to protect circuits from ESD.

Cable shielding

Protective layers around cables that prevent interference from electromagnetic fields.

Linear regulator

A voltage regulator that maintains a constant output voltage without switching noise.

Switching regulator

A voltage regulator that efficiently converts one voltage to another using high-frequency switches.

Ripple voltage formula

$V_{r(pp)} \text{ approx } \frac{I_{load}}{f_{ripple} \times C}$; estimates peak-to-peak ripple voltage.

Grounding mistakes

Errors in connecting grounds that can lead to noise in analog circuits.

Oscilloscope

An electronic test instrument that visually represents voltage signals over time.

Signal generator

A device that produces electrical waveforms used for testing circuits.

DMM (Digital Multimeter)

A tool used to measure voltage, current, resistance, and continuity.

Loaded voltage-drop testing

Measurement of voltage drop across a connection while the circuit is under load.

Common failure mode

A typical way in which a connection can fail, such as intermittent, noisy, or resistive behavior.

Electromagnetic interference (EMI)

Disturbances generated by external sources that affect electrical circuits and signals.

Decoupling capacitors

Capacitors placed near load devices to filter out high-frequency noise and provide stability.

Schematic

A diagram that represents the electrical relationships between components using symbols.

Block diagram

A simplified representation of a system that shows the relationships between different functions.

Flow chart

A diagram that shows a sequence of operations or decisions in a process.

Noise sensitivity

A measure of how susceptible a circuit or device is to electrical noise.

Power dissipation in regulators

The power lost as heat in a voltage regulator, calculated using the difference between input and output voltage.

Signal tracing

The process of injecting known signals into a circuit and using measurement tools to follow that signal through stages.