DC charging has become a key charging device with a faster speed than AC charging to meet the growing demand for quick charging. Among the many electric vehicle charging devices, 30kW DC chargers are highly regarded for their excellent fast charging capability and high efficiency. This paper will delve into the working principle of the 30 kW DC charger, analyze its charging time, and focus on operating and maintaining this equipment safely.
How Does a 30kW DC EV Charger Charge an EV?
This charger efficiently converts AC power to DC power through a rectifier, which delivers DC power directly to the battery of an electric vehicle for fast charging. When using the 30 kW charger to charge an electric car, the user inserts the charging plug into the charging port and activates the charging station.
If the charger is equipped with the plug-and-charge function, it is unnecessary to start it manually. During the charging process, the charger automatically adjusts the charging rate according to the EV's charging needs and power rating. It also monitors the battery status to ensure safe and efficient charging.
How to Safely Operate and Maintain a 30kw DC Charger
When you buy a 30kw electric car charger or want to use a public 30kw charger, you need to know some precautions to regulate its use. Here is my list of some do's and don'ts about operating and maintaining a 30kw charger:
1.How to operate an electric car charger
In terms of operation, users should ensure that they read the charger's instructions carefully and follow the correct operating steps before charging. During the charging process, monitor the charger's operating status, such as charging current, voltage, and other parameters, to ensure they are within the normal range. If you encounter abnormal conditions, such as overheating the charger or strange noises, stop charging immediately and seek professional assistance.
Operating an electric vehicle charger
• Browse the operation manual: When you buy an EV charger online, an operation manual crafted by the EV charger wholesaler arrives at your home along with the charger. Before using the EV charger, you should carefully read and understand the manual to ensure you know the correct operation steps and precautions.
• Correct Connection: Before you start charging, you need to correctly connect the charging plug to the charging port of your electric car. In addition, make sure that the connection is secure and that the plug is not damaged.
• Start charging: Press the charging button to start charging. During the charging process, the status of the charging indicator light can reflect the charging progress. Usually, when the charging indicator light shows yellow, it is charging, and when the charging is completed, the charging indicator light will change from yellow to green.
• Charging Complete: When charging is complete, unplug the charging gun and put it back in its original position.
Precautions when charging
• Avoid overcharging: Avoid keeping the EV charged for a long time, even after it is fully charged. For lithium batteries used in EVs, prolonged periods in the charging state may result in adverse reactions to the chemicals within them, leading to a decline in battery performance or even triggering a short circuit.
• Monitor the charging process: Regularly monitor the charging status during the charging process to ensure that everything is in order. If abnormalities are detected, interrupt charging and check for problems.
• Avoid use in bad weather: Avoid using the charger when encountering bad weather, such as thunder and lightning, heavy rain or high wind, etc.
2.How to Maintain and Care for the 30kw charger
As part of its maintenance, charging stations should be regularly examined and cleaned. It would help if you verified the appearance, connecting wires, plugs, and other parts are undamaged, as well as whether the heat dissipation system is functioning as intended. Furthermore, charging should not be used in humid, high-temperature or flammable environments to reduce risk. Furthermore, replacing worn parts and cleaning off dust regularly can extend service life and ensure the stable performance of charging systems.
Repair Faults Quickly: Should any issues or faults develop with your electric car charger, take immediate measures to prevent further damage. Consult with its manufacturer and professional technicians as soon as possible for complex malfunctions that cannot be solved easily by yourself or without professional intervention.
Comparison Between 30kW DC Charger and 180kW DC Rapid Charger
A 180kW DC rapid charger boasts superior charging capacities and speeds compared to its 30kw EV charger. This means it can supply more power to electric vehicles for faster charging rates, perfect for motorways or high-traffic areas! Although more costly regarding infrastructure requirements and costs, such 180 KW EV chargers remain popular among vehicle owners looking for efficient battery recharging solutions.
The 30kw dc fast charger offers lower charging capacities and speeds than commercial AC chargers. Though faster than commercial AC chargers, its charge times cannot match those of a 180 kW rapid charger. Still, its lower power output may make it more suitable for vehicles with smaller battery capacities or older charging technologies. 30 kW chargers have lower installation and operating costs than rapid chargers compared to rapid charge point operators, making this option cost-effective in certain instances.
How Long Does Charging an EV Using a 30 kW DC Charger Take?
Calculating the charging time of an EV is a relatively straightforward process that only requires three key pieces of information and an appropriate formula to complete. First, we must establish three basic figures: capacity, remaining charge status, and charger power consumption.
The capacity of an EV battery is usually measured in kilowatt-hours (kWh), representing its storage capability. Conversely, the remaining charge measures how much power has already been utilized or left. Meanwhile, charger power, expressed in kilowatts, or KWh, determines how quickly they can charge the battery each hour.
Once we have all of this primary data, we can use the following formula to calculate the charging time:
Charge Time = (EV Battery Capacity x (100 - Current Charge Percentage)/(Charger Rated Power (kW) x Charging Efficiency).
In this formula, we multiply the total capacity of an EV battery by its remaining charge percentage to determine the remaining power that needs to be charged. Then, we divide this figure by the sum of charger power and efficiency to estimate the required charging time.
Note that charging efficiency is typically defined as less than one and indicates how efficiently a charger converts electrical energy into something the battery can store. Actual charging times may differ slightly due to factors like battery temperature and charger age. However, using the formula provides a rough estimate.
Example Data:
Let us assume the EV battery capacity is 60 kWh, the charger is 30 kW, and the charging efficiency is 90%. The calculation method would then look something like this:
Charging time = 60kWh/3kWx0.9 (Charging Efficiency x 1) = 2.22 Hours
This 60 kWh EV should take an estimated 2.22 hours from zero to full charge using a 30 kW charger. However, actual charging times may differ depending on factors such as battery health and ambient temperature. Please use this calculation only as a point of reference.
Comparison of 30kW DC Chargers
On the market today, numerous brands and models of 30kW DC chargers may confuse EV drivers when shopping. To help make your selection more accessible, we present a detailed comparison between two 30 kW DC chargers from one well-known company, Joint.
• Product 1: Joint EVD001
To enhance user charging experiences, the Joint EVD001 DC EV charger features an easily removable pullout power module for hassle-free maintenance and servicing, an intuitive 7-inch touchscreen user interface with plug-and-charge features for simplified charging operations, connectivity options including LTE, Wi-Fi, and Ethernet support, plus two charging guns that allow simultaneous charging of two electric vehicles, significantly increasing efficiency.
• Product 2:Joint EVD100
The Joint EVD 100 DC 30KW EV charger features an easily removable power module for convenient maintenance and a wide voltage range from 200V to 1000V, making it suitable for charging various electric vehicle models. Ideal for home use, charging stations in shopping malls, and fleet management alike, its CCS2 standard charging socket comes with a 5-metre cable to ensure effortless charging.
• Comparing EVD001 vs. EVD100
Our tests of these two products revealed several distinct differences. For instance, the EVD001 outshines its counterpart with 50 amps regarding maximum input current. Slightly higher than 45 amps from the EVD100. In terms of socket type usage. EVD001 supports CCS Type 1 sockets, while EVD001 supports CCS2*2 or CCS2+CHAdeMO sockets. Both products support OCPP 1.6J protocol compatibility across numerous charging management systems and charging management protocols.
As for simultaneous charging capabilities, the EVD001's dual charging gun design enables it to charge two EVs simultaneously, while its counterpart, the EVD100, does not.
Feature | EVD100 | EVD001 |
Maintenance | Pull-out power module | Pull-out power module |
Network | LTE, Wi-Fi, and Ethernet | LTE, Wi-Fi, and Ethernet |
Other Features | / | Supports Plug&Charge, simultaneous charging for two EVs |
User Authentication | Plug & Play / RFID / QR Code | Plug & Play / RFID / QR Code |
Conclusion
In summary, if your need involves charging two electric vehicles simultaneously, the EVD001 is unquestionably the superior choice. However, if single-charge power and compatibility matter more to you because your EV uses CCS Type 1 plugs, then the EVD100 could be your ideal partner.
Post time: Apr-09-2024