EV Terminology: The Complete Glossary

EV Terminology: The Complete Glossary

If you've ever read an EV spec sheet and felt like you needed a decoder ring, this page is for you. I've rounded up every term you'll encounter while shopping for an electric vehicle in Canada, explained in plain language, with real-world context.

When I first started exploring EVs, I was overwhelmed by the alphabet soup. kWh, CCS, LFP, WLTP, SOC, BMS, it felt like the industry was deliberately trying to confuse people. Turns out most of these concepts are straightforward once someone explains them without jargon, and that's exactly what I'm going to do here.

This glossary is organized by category so you can jump to what matters most, but I'd encourage you to skim the whole thing. Even if you think you know your stuff, I bet a few of these will surprise you. And if you're new to EVs entirely, bookmark this page, you'll come back to it.

Battery and Chemistry

These terms cover what's inside your EV's battery pack, the chemistry, the design, and how it all fits together.

Battery Degradation, The gradual loss of your battery's maximum capacity over time. All lithium-ion batteries degrade, but modern EVs lose capacity slowly, typically 1-2% per year. After 10 years, most EV batteries still retain 85-90% of their original capacity. LFP batteries tend to degrade even more slowly than NMC. Don't let this scare you, your gas engine degrades too, you just never had a percentage to stare at.

BMS (Battery Management System), The electronic brain that monitors and manages your battery pack. It balances charge across individual cells, controls temperature, prevents overcharging or over-discharging, and reports state of charge to the dashboard. A good BMS is the unsung hero of a reliable EV. BYD, CATL, and other Chinese manufacturers have invested heavily here.

Cell-to-Body (CTB), An advanced manufacturing approach where the battery pack is integrated directly into the vehicle's structural frame. The BYD Seal uses this, the floor of the car literally is the battery. This saves weight, improves rigidity, and lowers the centre of gravity. It's clever engineering, but it does raise questions about repairability after a serious collision.

Cell-to-Pack (CTP), A battery design that eliminates the intermediate "module" layer. Instead of cells > modules > pack, you go straight from cells to pack. BYD's Blade Battery is the most famous CTP design, long, thin cells arranged directly in the pack like sardines in a tin. CATL's Qilin battery also uses CTP. The result is better space utilization, lower weight, and fewer potential failure points.

CATL, Contemporary Amperex Technology Co. Limited. The world's largest EV battery manufacturer, based in Ningde, China. CATL supplies cells to Tesla, BMW, Volkswagen, Volvo, and many others. If you're driving an EV, there's a good chance CATL made your cells, even if you didn't buy a Chinese brand.

Cycle Life, The number of charge-discharge cycles a battery can endure before dropping to a certain capacity threshold (usually 80%). LFP batteries typically offer 3,000+ cycles, while NMC batteries are rated for around 1,500 cycles. For context, charging your car once per day gives you roughly 4-8 years before you hit that threshold with NMC, and 8+ years with LFP. See our deep dive on LFP vs NMC Batteries Explained.

kWh (Kilowatt-hour), The unit of energy that measures your battery's total capacity, think of it as the "size of your fuel tank." A 60 kWh battery stores 60 kilowatt-hours of energy. Bigger number means more range, all else being equal. The BYD Seagull has a 30.08 kWh pack (city car), while the BYD Seal offers up to 82.56 kWh (highway cruiser). When someone asks "what does kWh mean?"; it's simply how much energy the battery can hold.

LFP (Lithium Iron Phosphate), A battery chemistry using iron and phosphate in the cathode. LFP is cheaper to produce, safer (virtually no thermal runaway risk), and lasts longer than NMC, but it's heavier per kWh and loses more range in extreme cold. BYD uses LFP across its entire lineup. You can safely charge LFP to 100% daily without worrying about degradation. We cover this thoroughly in LFP vs NMC Batteries Explained.

Lithium-ion, The broad family of rechargeable battery chemistries used in virtually all modern EVs (and your phone, laptop, and power tools). LFP and NMC are both types of lithium-ion batteries. The "lithium" part refers to lithium ions moving between the anode and cathode during charging and discharging.

NMC (Nickel Manganese Cobalt), A battery chemistry that packs more energy per kilogram than LFP, meaning lighter packs and more range. The trade-off: NMC is more expensive, less thermally stable, and has a shorter cycle life. Most legacy automakers use NMC. For longevity, you'll want to keep daily charging to around 80%. See LFP vs NMC Batteries Explained for the full breakdown.

SOC (State of Charge), The current battery level expressed as a percentage, like the fuel gauge on a gas car. 100% SOC means full, 0% means empty (though the BMS reserves a small buffer at both ends to protect the cells). You'll use SOC constantly when planning trips and charging stops.

Thermal Management, The system that heats or cools the battery pack to keep it in its optimal temperature range. This is critical in Canada. Liquid-cooled thermal management (used by BYD, Zeekr, and most modern Chinese EVs) is far superior to air-cooled systems. Good thermal management means faster charging, less cold-weather range loss, and longer battery life.

Charging

Everything about putting electrons into your car, the plugs, the speeds, and the strategies.

AC Charging, Charging using alternating current, which is what comes out of your wall outlets. AC charging requires the car's on-board charger (OBC) to convert AC to DC before the battery can accept it. All Level 1 and Level 2 charging is AC. It's slower than DC but perfectly fine for overnight home charging, which is how most EV owners charge 90%+ of the time.

ABRP (A Better Route Planner), The must-have trip planning app for EV road trips. You enter your car model, starting SOC, and destination, and ABRP maps out the optimal charging stops along the way, accounting for speed, elevation, weather, and charger availability. I use it for every long trip. Seriously, download it before your first road trip.

CCS (Combined Charging System), The DC fast charging standard used by most non-Tesla EVs in North America. CCS1 (the North American version) combines a J1772 AC plug on top with two DC pins on the bottom. Every Chinese EV sold in Canada uses CCS1 for fast charging. CCS2 is the European variant. For a deeper look at charging networks, see our EV Charging Network Guide.

DC Fast Charging (DCFC), Charging using direct current delivered straight to the battery, bypassing the on-board charger entirely. DC fast charging is what you use on road trips, it can add 100-300 km of range in 20-40 minutes, depending on the car and charger. Speeds range from 50 kW at older stations to 350 kW at the latest Electrify Canada units.

Destination Charger, A Level 2 charger installed at a hotel, restaurant, shopping centre, or other destination where you'll be parked for a while. These typically deliver 7-11 kW (30-50 km of range per hour). They're not fast enough for a quick top-up, but they're perfect for adding range while you eat dinner or sleep at a hotel. Tesla also has its own "Tesla Destination" network of Level 2 chargers, which are increasingly being opened to other brands.

Home Charging, Charging your EV at home, which is how most owners get 80-90% of their charging done. A standard 120V outlet (Level 1) adds about 6-8 km of range per hour, painfully slow. A 240V outlet or hardwired EVSE (Level 2) adds 30-50 km per hour, giving you a full battery overnight. If you have a garage or dedicated parking spot, home charging transforms the EV ownership experience. See Charging at Home in Canada for the full setup guide.

J1772, The standard Level 2 AC charging connector used across North America. Every non-Tesla EV (including all Chinese EVs sold here) has a J1772 port. It's the plug you'll use at home and at most public Level 2 stations. The connector handles up to 19.2 kW, though most home setups deliver 7.2-9.6 kW.

kW (Kilowatt), A unit of power that measures how fast energy flows. In EV terms, kW describes charging speed and motor output. A 7 kW home charger delivers energy seven times faster than a 1 kW trickle. A 150 kW DC fast charger is roughly 20 times faster still. Think of kWh as the size of the bucket, and kW as how fast you're filling it.

Level 1 Charging, Charging from a standard 120V household outlet. Adds about 6-8 km of range per hour. It works in a pinch, but I wouldn't rely on it as your primary charging method unless you drive very short distances. Most EV owners upgrade to Level 2 within the first month.

Level 2 (L2) Charging, Charging from a 240V source (like a dryer outlet or dedicated EVSE). Adds 30-50 km of range per hour, depending on the car's on-board charger. This is the sweet spot for home charging, you plug in when you get home, wake up full. Level 2 is also the standard at most public destination chargers and workplace charging stations.

NACS (North American Charging Standard), Tesla's charging connector, now adopted as an open standard across the industry. Starting in 2025, most new EVs in North America are shipping with NACS ports instead of CCS1. Chinese EVs entering Canada will need to decide between CCS1 and NACS, this is still evolving, and I'd recommend checking the specific model you're interested in. NACS gives you access to Tesla's massive Supercharger network.

OBC (On-Board Charger), The component inside your EV that converts AC power from the wall into DC power the battery can use. The OBC's rating (typically 7 kW to 22 kW) determines your maximum AC charging speed. A car with an 11 kW OBC will charge faster on Level 2 than one with a 7 kW OBC, even on the same outlet. This spec is worth checking; it's often overlooked.

Pre-conditioning, Heating or cooling the battery (and cabin) before you drive or before you arrive at a charger. In Canadian winters, pre-conditioning the battery before a DC fast charge session dramatically improves charging speed. Many Chinese EVs let you trigger this through the app or automatically when you set a charger as your navigation destination. This is one of those features that separates a good cold-weather EV from a frustrating one.

Supercharger, Tesla's proprietary DC fast charging network, the largest in North America with thousands of stations. As more automakers adopt NACS, Superchargers are opening up to non-Tesla EVs. With a NACS adapter or native NACS port, you may be able to use Superchargers with your Chinese EV, check compatibility for your specific model. Speeds top out at 250 kW.

Time-of-Use (TOU) Rates, Electricity pricing that varies by time of day. Most Canadian provinces offer lower rates during off-peak hours (typically overnight). In Ontario, off-peak is about 8.7 cents/kWh vs 18+ cents at peak. This means charging your EV overnight can cost roughly half compared to after-work charging. Most EVs let you schedule charging to start during off-peak hours automatically. This is one of the biggest money advantages of EV ownership.

Range and Efficiency

How far your EV goes, how it's measured, and why the number on the sticker doesn't always match reality.

CLTC (China Light-Duty Vehicle Test Cycle), The range testing standard used in China. CLTC numbers are the most optimistic of the three major standards, they use lower average speeds, less aggressive acceleration, and a milder climate assumption. When a Chinese manufacturer quotes 500 km of CLTC range, expect roughly 400-420 km on WLTP and maybe 370-390 km on EPA. Always ask which standard is being used.

EPA Range, Range as measured by the U.S. Environmental Protection Agency. EPA testing is the most conservative of the major standards, using a mix of city and highway driving at American speeds. Since Canada doesn't have its own test, EPA is the closest benchmark to real-world Canadian driving (in warm weather, at least). Winter range will still be lower.

Range Anxiety, The fear that your EV won't have enough charge to reach your destination. It's a very real feeling for new EV owners, but I promise it fades within a few weeks. Once you internalize that you start every morning with a full battery and that a 400 km range covers 95% of your daily needs with room to spare, range anxiety becomes a non-issue. Planning road trips with ABRP also helps enormously.

Wh/km (Watt-hours per kilometre), The standard measure of EV efficiency, how much energy the car uses per kilometre driven. Lower is better. An efficient EV like the BYD Dolphin might average 140 Wh/km in mild weather, while a larger SUV could use 200+ Wh/km. This is the EV equivalent of L/100km. In winter, expect this number to increase by 30-50%.

WLTP (Worldwide Harmonised Light Vehicles Test Procedure), The range testing standard used in Europe and increasingly quoted globally. WLTP is more realistic than CLTC but still somewhat optimistic compared to EPA. Most Chinese EVs entering Canada will initially have WLTP or CLTC ratings. As a rough guide: WLTP is about 15-20% higher than EPA, and CLTC is about 20-30% higher.

Driving and Performance

Terms about how EVs actually feel on the road.

BEV (Battery Electric Vehicle), A vehicle powered entirely by an electric battery and motor, with no internal combustion engine. The BYD Dolphin, Zeekr X, MG4, and Volvo EX30 are all BEVs. This is in contrast to PHEVs (see below) and hybrids. When we talk about "EVs" on DriveChina, we usually mean BEVs unless otherwise specified.

Frunk, Front trunk. Since EVs don't have a front-mounted engine (or have a much smaller motor), many offer storage space under the front hood. The BYD Seal has a decent frunk; the BYD Dolphin doesn't really have one. Frunk size varies wildly across models. It's a nice bonus for grocery runs but not a dealbreaker if it's small or absent.

Heat Pump, An energy-efficient system for heating the cabin (and sometimes the battery). Instead of using a resistive heater that eats battery, a heat pump moves heat from outside air into the cabin, even in cold weather. This is a big deal in Canada because cabin heating is the single largest source of winter range loss. Most modern Chinese EVs include a heat pump as standard. I consider it a must-have for any Canadian EV buyer.

ICE (Internal Combustion Engine), A traditional gasoline or diesel engine. EV owners also use "ICE" as an adjective: "ICE car," "ICE vehicle." You'll also see "ICEd" used as a verb, as in "someone ICEd the charging spot", meaning a gas car parked in an EV charging space. Yes, it happens. Yes, it's annoying.

One-Pedal Driving, A driving mode where lifting your foot off the accelerator engages strong regenerative braking, slowing the car significantly without touching the brake pedal. Most EVs let you adjust the regen strength. In city driving, one-pedal driving is genuinely wonderful once you get used to it, I barely touch the brake pedal in traffic. Not every car offers true one-pedal driving (the car coming to a complete stop), so check if this matters to you.

OTA (Over-the-Air Update), Software updates delivered wirelessly to your car, like a phone update. Chinese EVs are generally very good at OTA, BYD, Zeekr, and others regularly push updates that add features, improve efficiency, and fix bugs without a dealer visit. This is one area where Chinese manufacturers have genuinely leapfrogged some legacy automakers.

PHEV (Plug-in Hybrid Electric Vehicle), A vehicle with both an electric motor/battery and a combustion engine. PHEVs can drive a limited distance on electric power alone (typically 50-100 km) before the gas engine kicks in. BYD's DM-i technology is one of the most efficient PHEV systems in the world. PHEVs make sense if you can't charge regularly or frequently drive very long distances.

Regen / Regenerative Braking, The system that captures kinetic energy when you slow down and feeds it back into the battery. When you lift off the accelerator or press the brake, the electric motor runs in reverse as a generator. In city driving with lots of stop-and-go, regen can recover 15-30% of your energy. This is why EVs are often more efficient in the city than on the highway, the opposite of gas cars.

Torque, The rotational force produced by the motor, measured in Newton-metres (Nm). EVs deliver maximum torque instantly from zero RPM, which is why even a modest EV feels quick off the line. The BYD Seal makes 570 Nm in its dual-motor configuration, enough to pin you to the seat. For context, a Toyota Camry makes about 267 Nm and takes a moment to build up to that.

Standards and Ratings

Testing standards, incentive programs, and regulatory terms.

CMVSS (Canadian Motor Vehicle Safety Standards), The federal safety standards that every vehicle sold in Canada must meet. This is relevant for Chinese EVs because vehicles designed primarily for the Chinese or European market need to be certified to CMVSS before they can be sold here. It covers everything from crash performance to lighting to seatbelt anchors. See our guide on Chinese EV Safety Ratings Explained for more context.

Euro NCAP, The European New Car Assessment Programme, one of the most rigorous crash testing organizations in the world. Many Chinese EVs have scored 5 stars in Euro NCAP testing, which is a strong signal for Canadian buyers since we don't yet have extensive local crash data for these models. The BYD Atto 3, Chery Omoda E5, and MG4 have all earned top marks.

iZEV (Incentives for Zero-Emission Vehicles), The federal Canadian incentive program that offers up to $5,000 off the purchase of an eligible EV. To qualify, the vehicle must be under $55,000 CAD (for cars) or $60,000 CAD (for SUVs/trucks). Many Chinese EVs are priced to hit these caps. Provincial rebates (like Quebec's Roulez vert) stack on top. The iZEV program is a major factor in making affordable Chinese EVs even more attractive.

MVSA (Motor Vehicle Safety Act), The Canadian federal legislation that governs vehicle imports and safety compliance. If you're thinking about importing a Chinese EV directly, this is the law you'd need to navigate. In practice, it means you can't just ship a car from China and register it, it needs to meet CMVSS standards and be properly certified. See How to Import a Chinese EV to Canada for details.

Transport Canada Recall Database, The federal database tracking all vehicle safety recalls in Canada. Once Chinese EVs are officially sold here, any recalls will be listed in this database. It's worth bookmarking and checking periodically, especially in the first few years of a new model's availability.

Chinese EV-Specific Terms

Terms and concepts you'll encounter specifically when researching Chinese electric vehicles.

800V Architecture, An electrical system that runs at 800 volts instead of the typical 400V found in most EVs. Higher voltage means faster charging and more efficient power delivery. Several Chinese EVs use 800V architecture, including the Zeekr 001 and the BYD Seal. It enables peak charging speeds of 200+ kW, meaning 10-80% charges in under 20 minutes.

BYD, Build Your Dreams. China's largest EV manufacturer and the world's top-selling EV brand. BYD started as a battery company in 1995 and now makes everything from the affordable BYD Seagull to luxury sedans. They manufacture their own batteries, chips, and motors, one of the most vertically integrated automakers on the planet.

CTB, See Cell-to-Body above. BYD's structural battery integration used in the BYD Seal and newer models.

CTP, See Cell-to-Pack above. Used by BYD (Blade Battery), CATL (Qilin), and others.

DM-i, BYD's plug-in hybrid technology. "DM" stands for "Dual Mode." DM-i prioritizes electric driving with a small, efficient gasoline engine as a range extender. BYD's fifth-generation DM-i system is remarkably efficient, some models achieve combined fuel consumption under 4 L/100 km. If you're not ready to go fully electric, DM-i is one of the best PHEV systems available.

e-Platform 3.0, BYD's dedicated electric vehicle platform, used for the Dolphin, Seal, and other models. It features an 800V electrical architecture (in newer versions), cell-to-body battery integration, and an eight-in-one electric powertrain. The platform is why BYD can offer competitive specs at lower price points, purpose-built EV architecture is more efficient than converting a gas car platform.

GWM (Great Wall Motor), One of China's largest automakers, known for SUVs and trucks. GWM owns the ORA brand (which makes the ORA 03) and the Tank brand. They've been expanding aggressively into Europe and Australia and are eyeing the Canadian market.

MEB (Modular Electric Drive Kit), Volkswagen's EV platform, worth mentioning because it appears in Chinese-manufactured EVs. The SAIC-Volkswagen joint venture builds MEB-based vehicles in China. While MEB itself isn't Chinese, you may encounter it when comparing Chinese-made EVs to European alternatives.

SEA (Sustainable Experience Architecture), Geely's EV platform, underpinning the Zeekr X, Zeekr 001, and several Volvo and Polestar models. Geely owns Volvo, Polestar, Lotus, and Zeekr, so this single Chinese platform touches multiple brands you'll encounter in Canada. The SEA platform supports both 400V and 800V configurations.

V2G (Vehicle-to-Grid), Technology that allows your EV to feed stored energy back into the electrical grid during peak demand. Your car becomes a mobile power station. This is still emerging in Canada, but provincial utilities are increasingly interested. BYD vehicles support bidirectional charging, and as time-of-use rates widen, V2G could actually make you money, charge cheap overnight, sell back at peak rates.

V2H (Vehicle-to-Home), Using your EV battery to power your house during an outage or peak pricing. With a 60+ kWh battery, most EVs can power an average Canadian home for 2-3 days. This is a genuine game-changer for anyone who's lived through an ice storm power outage in Ontario or Quebec. The BYD Dolphin's battery alone holds more energy than a Tesla Powerwall.

V2L (Vehicle-to-Load), Using your EV to power external devices, appliances, tools, camping equipment. Many Chinese EVs include a standard household outlet (120V) in the cargo area or under the charge port cover. V2L is popular for tailgating, camping, and job sites. It's one of those features you don't think you need until you use it once.

Quick-Reference Acronym Table

Here's every acronym from this glossary in one table for easy reference:

Wrapping Up

I know this is a lot of terms, but here's the thing: you don't need to memorize all of them before buying an EV. The ones that matter most for your purchase decision are probably kWh (battery size), kW (charging speed), LFP vs NMC (battery chemistry), and whichever range standard your car is rated on (EPA, WLTP, or CLTC).

Everything else you'll pick up naturally as you live with the car. I learned most of this stuff by owning an EV, not by studying beforehand. The EV community in Canada is incredibly helpful, forums, Facebook groups, and Reddit are full of people who remember what it was like to be new to this.

If you're just starting your Chinese EV research, I'd suggest reading this glossary alongside our Complete Buyers Guide and the EV Charging Network Guide. And if any of the battery chemistry terms here piqued your interest, LFP vs NMC Batteries Explained and BYD Blade Battery Everything You Need to Know go much deeper.

We'll keep updating this glossary as the industry evolves. If there's a term we missed, let us know, we want this to be the most useful EV glossary for Canadian buyers, period.