Glossary of Terms

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A page to help to grips with the all the acronyms on the forums to get newbies up to speed and for general reference

A

Acronym / Term Description Wikipedia
AC Alternating current (AC) is an electric current which periodically reverses direction, in contrast to direct current (DC) which flows only in one direction. Link

B

Acronym Description Wikipedia
Battery Balancing Battery balancing and battery redistribution refer to techniques that improve the available capacity of a battery pack with multiple cells (usually in series) and increase each cell's longevity. Link
BMS A battery management system (BMS) is any electronic system that manages a rechargeable battery (cell or battery pack), such as by protecting the battery from operating outside its safe operating area Link
BOM A Bill of Materials (BOM) is a list of the raw materials, sub-assemblies, intermediate assemblies, sub-components, parts, and the quantities of each needed to manufacture an end product. Link
Boost Converter A boost converter (step-up converter) is a DC-to-DC power converter that steps up voltage (while stepping down current) from its input (supply) to its output (load). Link
Buck Converter A buck converter (step-down converter) is a DC-to-DC power converter which steps down voltage (while stepping up current) from its input (supply) to its output (load). Link

C

Acronym / Term Description Wikipedia
CAN A Controller Area Network (CAN bus) is a robust vehicle bus standard designed to allow microcontrollers and devices to communicate with each other's applications without a host computer. Link
CCS The Combined Charging System (CCS) covers charging electric vehicles using the Combo 1 and Combo 2 connectors at up to 350 kilowatts. These two connectors are extensions of the Type 1 and Type 2 connectors, with two additional direct current (DC) contacts to allow high-power DC fast charging. Link
CHAdeMO CHAdeMO is the trade name of a quick charging method for battery electric vehicles delivering up to 62.5 kW by 500 V, 125 A direct current via a special electrical connector. Link

D

Acronym / Term Description Wikipedia
DC Direct current (DC) is the unidirectional flow of an electric charge. The electric current flows in a constant direction, distinguishing it from alternating current (AC). Link
DoD Depth of Discharge (DoD) is the fraction or percentage of the capacity which has been removed from the fully charged battery. Link

E

Acronym / Term Description Wikipedia
EVSE Electric vehicle supply equipment (EVSE), is an element in an infrastructure that supplies electric energy for the recharging of plug-in electric vehicles—including electric cars, neighborhood electric vehicles and plug-in hybrids. Link

F

Acronym / Term Description Wikipedia
FOC Field-Oriented Control (FOC), is a variable-frequency drive (VFD) control method in which the stator currents of a three-phase AC electric motor are identified as two orthogonal components that can be visualized with a vector. Link

G

Acronym / Term Description Wikipedia

H

Acronym / Term Description Wikipedia
HVDC A high-voltage, direct current (HVDC) electric power transmission system Link

I

Acronym / Term Description Wikipedia
IGBT An insulated-gate bipolar transistor (IGBT) is a three-terminal power semiconductor device primarily used as an electronic switch which, as it was developed, came to combine high efficiency and fast switching. Link
Inverter A power inverter, or inverter, is a power electronic device or circuitry that changes direct current (DC) to alternating current (AC). Link

J

Acronym / Term Description Wikipedia

K

Acronym / Term Description Wikipedia

L

Acronym / Term Description Wikipedia
LiFePO4 The lithium iron phosphate battery (LiFePO4 battery) or LFP battery (lithium ferrophosphate), is a type of lithium-ion battery using LiFePO4 as the cathode material Link

M

Acronym / Term Description Wikipedia

N

Acronym / Term Description Wikipedia

O

Acronym / Term Description Wikipedia
OEM An original equipment manufacturer (OEM) is a company that produces parts and equipment for another manufacturer. Link

P

Acronym / Term Description Wikipedia
PCB A printed circuit board (PCB) mechanically supports and electrically connects electrical or electronic components using conductive tracks, pads and other features etched from one or more sheet layers of copper laminated onto and/or between sheet layers of a non-conductivesubstrate. Link
PFC power factor correction Aims to draw a sinusoidal current from a sinusoidal voltage source. The quick current loop on the openinverter firmware somewhat achieves this when in boost mode, i.e. it boosts more in the sine "valley" and boosts less at the peak.

Boost mode would require a (discharged) battery voltage below peak voltage and a rectified voltage to be fed in to the original battery input.

Power Factor The power factor of an AC electrical power system is defined as the ratio of the real power absorbed by the load to the apparent power flowing in the circuit, and is a dimensionless number in the closed interval of −1 to 1. Link
PWM Pulse-width modulation (PWM) is a method of reducing the average power delivered by an electrical signal, by effectively chopping it up into discrete parts. The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. Link

Q

Acronym / Term Description Wikipedia

R

Acronym / Term Description Wikipedia

S

Acronym / Term Description Wikipedia
SDO From CANopen, the SDO protocol is used for setting and for reading values from the object dictionary of a remote device. Link
Single-phase electric power In electrical engineering, single-phase electric power is the distribution of alternating current electric power using a system in which all the voltagesof the supply vary in unison. Link
SoC State of charge (SoC) is the level of charge of an electric battery relative to its capacity. Link
SoH State of health (SoH) is a figure of merit of the condition of a battery (or a cell, or a battery pack), compared to its ideal conditions. The units of SoH are percent points (100% = the battery's conditions match the battery's specifications). Link

T

Acronym / Term Description Wikipedia
Three-phase electric power In a symmetric three-phase power supply system, three conductors each carry an alternating current of the same frequency and voltage amplitude relative to a common reference but with a phase difference of one third of a cycle between each. Link

U

Acronym / Term Description Wikipedia

V

Acronym / Term Description Wikipedia
VAC VAC is an abbreviation for "volts AC", where AC stands for 'alternating current'. Link
VDC VDC is an abbreviation for "volts DC." DC stands for "direct current," which means the voltage is constant (as opposed to AC, alternating current) Link

W

Acronym / Term Description Wikipedia
STM32 The STM32 family of 32-bit microcontrollers based on the Arm® Cortex®-M processor is designed to offer new degrees of freedom to MCU users. It offers products combining very high performance, real-time capabilities, digital signal processing, low-power / low-voltage operation, and connectivity, while maintaining full integration and ease of development. Link

X

Acronym / Term Description Wikipedia

Y

Acronym / Term Description Wikipedia

Z

Acronym / Term Description Wikipedia

[0-9]

Acronym / Term Description Wikipedia
1 Phase Power In electrical engineering, single-phase electric power is the distribution of alternating current electric power using a system in which all the voltagesof the supply vary in unison. Link
3 Phase Power In a symmetric three-phase power supply system, three conductors each carry an alternating current of the same frequency and voltage amplitude relative to a common reference but with a phase difference of one third of a cycle between each. Link