Wiktor Wise
The term CHA has various meanings, and its significance depends on the context in which it is used. In the context of electric scooters, CHA is speculated to indicate the number of times a battery has been fully charged. On the other hand, CHA also refers to CHAdeMO, a fast-charging system for battery-electric vehicles, derived from the Japanese phrase o CHA deMO ikaga desuka, which translates to How about a cup of tea? referencing the time taken to charge a car.
| Characteristics | Values |
|---|---|
| Full Form | CHANG INTERNATIONAL CIRCUIT, CHArge de MOve |
| Context | Electric Scooters, Electric Vehicles |
| Meaning | Number of times the battery was fully charged |
| Charging System | CHAdeMO (fast-charging system for battery electric vehicles) |
| Charging Speed | First-generation: 62.5 kW by 500 V, 125 A DC; Second-generation: 400 kW by 1 kV, 400 A DC; Third-generation: 900 kW (under development) |
| Connector | Proprietary electrical connector; CAN bus protocol for data connection |
| Functions | Safety interlock, transmitting battery parameters, vehicle-to-grid (V2G) integration, etc. |
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What You'll Learn
Electric scooter battery charge
Electric scooters are a fun, eco-friendly way to get around, and keeping their batteries charged correctly is important for both performance and safety. The display on your electric scooter will usually indicate the charging status, and it's important to always use the correct charger to avoid damaging the battery.
Before charging your electric scooter, it's important to let it cool down for at least 15 minutes, as the battery will heat up when in use. Charging a hot battery will negatively impact its longevity and capacity. It's also important to ensure that the scooter is completely dry before charging, as very few electric scooters are completely waterproof. Charging should be done in a cool, dry place, at room temperature, and never in direct sunlight or in a humid environment. Extreme temperatures can cause serious failure or even an explosion.
When charging, always plug the charger into the wall outlet first, and then into the scooter. This is the safest method and will protect the charger and its output capacitors. The charging time will depend on the battery capacity and the type of charger used, but it usually takes between 4 and 20 hours to fully charge an electric scooter. The charger light turning green indicates that the scooter is fully charged. However, for some chargers, the light may turn green before the battery is 100% charged, so it's important to refer to the scooter's built-in voltmeter or battery display to be sure. To get the most out of your battery, it's best to stop charging as soon as it's fully charged, as overcharging can degrade the battery's capacity over time.
It's not necessary to fully charge or discharge your scooter's battery before riding. In fact, operating your battery between 30% and 80% of its full charge will increase its lifespan. Regularly allowing the battery to drain completely can be detrimental, so it's best to charge your scooter whenever you need the range for a ride.
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CHAdeMO charging system
CHAdeMO is a fast-charging system for electric vehicles (EVs). It stands for CHArge de MOde and was developed in 2010 by a collaboration of Japanese EV manufacturers and TEPCO (Tokyo Electric Power Company). CHAdeMO uses the CAN communications system to initiate and control charging. This is the common vehicle communication standard, making it potentially compatible with the Chinese GB/T DC standard. However, it is incompatible with CCS charging systems without special adaptors.
CHAdeMO is capable of delivering up to 62.5 kW (500 V DC at a maximum of 125 A) and has plans to increase this to 400 kW. However, all installed CHAdeMO chargers are 50 kW or less. A full charge using CHAdeMO DC charging on early EVs such as the Nissan Leaf and Mitsubishi iMiEV can be achieved in less than 30 minutes. However, for the current crop of EVs with much larger batteries, a maximum 50 kW charging rate is no longer adequate for achieving a true 'fast charge'.
There are several competing charging plug and vehicle communication standards for DC fast charging, including CCS1 & 2 (Combined Charging System), Tesla (US/Japan and the rest of the world), and the Chinese GB/T system. The Tesla supercharger system, in particular, is capable of charging at more than twice the rate of CHAdeMO at 120 kW.
As electric vehicles and plug-in hybrids continue to rise in popularity, understanding the different charging options available is crucial for owners. While home charging accounts for more than 80% of charging sessions, workplace charging can also be a convenient option, potentially meeting most of an EV owner's commuting needs. Level 2 chargers at workplaces allow for quicker recharges, which can be valuable if an employee is at work for only part of the day or if the workplace has intermittent foot traffic.
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Electric vehicle charging standards
Electric vehicle supply equipment (EVSE) is used to charge electric vehicles (EVs) at varying speeds. The charging speed depends on the type of equipment used and the vehicle being charged.
Level 1 equipment provides charging through a common residential 120-volt (120V) AC outlet. Level 1 chargers can take 40-50+ hours to charge a BEV to 80% from empty and 5-6 hours for a PHEV. Level 2 equipment offers higher-rate AC charging through 240V (in residential applications) or 208V (in commercial applications) electrical service, and is common for home, workplace, and public charging. Level 2 chargers can charge a BEV to 80% from empty in 4-10 hours and a PHEV in 1-2 hours. Direct current fast-charging (DCFC) equipment offers rapid charging along heavy-traffic corridors at installed stations. DCFC equipment can charge a BEV to 80% in just 20 minutes to 1 hour. Most PHEVs currently on the market do not work with fast chargers.
There are four competing rapid electric charging standards in operation across the world, with four different rapid-charging standards that are largely incompatible with one another. The main competition is between Japanese and European carmakers, but Tesla and Chinese manufacturers are also involved. CHAdeMO is the charging standard favoured by Japanese carmakers, including Nissan, Mitsubishi, and Toyota. It was the first widely proliferated rapid charging solution and is seen on popular vehicles such as the Nissan Leaf.
The Open Charge Point Protocol (OCPP) is an international, open-source, vendor-independent standard available for free. It is considered the de-facto standard for charging infrastructure interoperability among charging equipment manufacturers, software and systems providers, charging network operators, and research organizations. OCPP 2.0.1 also offers the option to support plug and charge for electric vehicles supporting the ISO 15118 protocol. ISO 15118 is an international standard for bi-directional digital communications between electric vehicles and charging stations. It defines a V2G communication interface for bi-directional charging/discharging of electric vehicles. This enables a seamless end-to-end charging process, which includes automatic authentication and billing, and removes the need to use an RFID card, an app, or to memorize PIN numbers.
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Electric car energy storage
Electric vehicles (EVs) are becoming increasingly common, with their market share expected to reach 50% by 2030 in Europe. The technology is superior to internal combustion engines in efficiency, endurance, durability, acceleration capability, and simplicity. They are also environmentally friendly and can recover some energy during regenerative braking. However, one of their main drawbacks is their energy storage capability.
The energy storage systems (ESSs) used in EVs face challenges related to safety, size, cost, and management issues. The selection of an ESS depends on factors such as capacity, total output power, discharge time, depth of discharge (DOD), self-discharge, life cycle, efficiency, size, and cost. The capacity of an ESS refers to the total amount of energy available after a full charge, and it can vary depending on self-discharge, DOD, and response time.
The storage capacity of EV batteries is crucial for integrating renewable energy into the grid, whether through stationary storage or vehicle-to-grid (V2G) technology. V2G technology allows for the balancing of generation and demand, regulation of non-controllable energy sources, and the reduction of electricity costs for consumers. However, it is not yet widely available due to the EV market still being in the development phase.
To improve energy storage capabilities and reduce charging times, various options are being studied, including chemical battery systems, ultracapacitors, flywheels, and fuel cells. Ultracapacitors, for example, have shown an increase in range of 16% in city tests, but the difference is less significant in highway tests. Fuel Cell Electric Vehicles (FCEVs) also have limitations, such as range, durability, and cost, that impact their commercialisation.
Overall, the development of efficient and effective energy storage systems for EVs is crucial for reducing carbon and greenhouse gas emissions and integrating renewable energy sources into the electrical grid.
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Electric charging in North America
Electric vehicle charging in North America is becoming increasingly accessible, with a growing number of charging stations and networks being established across the region. One of the largest electric vehicle charging networks in North America is offered by Ford, which provides its all-electric vehicle customers with over 12,000 charging locations and more than 35,000 charge plugs. Ford's charging network includes fast-charging options and is available both at-home and on-the-go through the FordPass app and in-vehicle screens. This addresses a significant concern for those transitioning to all-electric vehicles, providing easy access to charging stations.
Another prominent electric vehicle charging network in the United States is Electrify America, which offers DC fast charging at more than 950 stations and over 4,250 connectors as of August 2024. Electrify America is a subsidiary of the Volkswagen Group of America and was established in 2016 as part of the company's efforts to offset emissions following the Volkswagen emissions scandal. While Electrify America has faced criticism for the reliability and maintenance of its stations, it continues to expand and improve its services.
In addition to these major networks, there are other initiatives to enhance electric vehicle charging in North America. For instance, Electrify America is building a charger network in Canada called Electrify Canada, targeting businesses, utilities, and government agencies. Moreover, companies like Amazon are partnering with automakers to offer installation services for home charging setups, making it more convenient for customers to transition to electric vehicles.
The availability of electric charging options is crucial in encouraging the adoption of electric vehicles and addressing range anxiety among potential consumers. By investing in charging infrastructure and improving accessibility, companies like Ford and Electrify America are playing a significant role in supporting the transition to electric mobility in North America.
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Frequently asked questions
On an electric scooter, CHA likely means the number of times your battery was fully charged.
CHA stands for "CHArge de MOve" in the context of electric vehicles. It is a fast-charging system for battery-electric vehicles.
The name CHAdeMO is derived from the Japanese phrase "o CHA deMO ikaga desuka", which translates to "How about a cup of tea?". It refers to the time it takes to charge a car.
First-generation CHAdeMO connectors deliver up to 62.5 kW by 500 V, 125 A direct current. The second-generation specification allows for up to 400 kW by 1 kV, 400 A direct current.
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