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FAQs

We have summarized some common problems, hope to help you. If you still have questions, please contact us!
  • 16.

    Why do I need to reset BMS?

    Battery management systems (BMS) are critical components in managing the health, performance and safety of rechargeable batteries, particularly in applications such as electric vehicles (EVs).
    There are several reasons why you might need to reset your BMS:

    ① Calibration: BMS systems may require periodic calibration to ensure accurate reading of battery parameters such as state of charge (SoC), state of health (SoH), voltage, temperature, and current. Resetting the BMS may initiate a recalibration process to improve accuracy.
    ② Fault clearing: If the BMS detects any faults or abnormalities in the battery pack, resetting it can clear error codes or faults that may be triggered by temporary problems.
    ③ Software update: When updating the firmware or software of the BMS, a reset may be required to apply the changes effectively.
    ④ Configuration changes: After changing the configuration settings of the BMS (such as adjusting charging and discharging parameters or changing the balance threshold), it may be necessary to reset the BMS.
    ⑤ Diagnostic purposes: Resetting the BMS may sometimes be part of the diagnostic procedure when troubleshooting battery-related issues.
    ⑥ Safety: In certain situations where the BMS may malfunction or behave abnormally, a reset can serve as a safety measure to prevent potential dangers associated with incorrect battery management.
    It is important to note that resetting the BMS should be done following the manufacturer's guidelines or with the assistance of qualified personnel to ensure that the reset or recalibration is completed correctly and safely. Because an incorrect reset or recalibration can result in inaccurate readings, reduced battery life, or even safety hazards.
  • 17.

    Why do consumers prefer EV?

    Consumers may prefer electric vehicles (EVs) for a variety of reasons, and these preferences contribute to their growing popularity. Here are some of the key factors that often influence consumers’ choice of electric vehicles:
    ① Environmental benefits: One of the main reasons why consumers choose electric vehicles is that compared with traditional internal combustion engine vehicles, electric vehicles have a lower impact on the environment. Electric vehicles have zero exhaust emissions, reducing air pollution and greenhouse gas emissions.
    ② Lower operating costs: Compared with traditional vehicles, electric vehicles generally have lower operating costs over time. The cost of electricity for charging is typically less than the cost of gasoline, and electric vehicles have fewer moving parts, reducing maintenance costs.
    ③ Government incentives: Many governments around the world offer incentives to encourage the adoption of electric vehicles. These incentives may include tax credits, rebates, reduced registration fees and access to carpool lanes.
    ④ Energy efficiency: Electric vehicles are generally more energy efficient than internal combustion engine vehicles. The conversion of electrical energy into mechanical energy in an electric motor is more efficient than the combustion process in a conventional engine.
    ⑤ Progress in battery technology: The continuous progress in battery technology has led to improvements in energy density, cruising range and charging speed. Consumers are attracted by the idea of longer driving range and faster charging times.
    ⑥ Innovative features: Electric vehicles are often equipped with innovative and high-tech features such as regenerative braking, instant torque delivery, connectivity options and autonomous driving capabilities that appeal to tech-savvy consumers.
    ⑦ Driving experience: Electric vehicles provide a smooth and quiet driving experience. The electric motor's instant torque delivery provides rapid acceleration for a different and enjoyable driving experience.
    ⑧ Increase charging infrastructure: The expansion of charging infrastructure, including the availability of public charging stations and home charging solutions, makes it more convenient for consumers to own and operate electric vehicles.
    ⑨ Concerns about climate change: Awareness of climate change and environmental sustainability continues to grow, with some consumers choosing electric vehicles as a way to reduce their carbon footprint and contribute to a cleaner, greener future.
    ⑩ Reduce dependence on fossil fuels: Consumers concerned about the environmental impact of fossil fuel consumption may prefer electric vehicles as a means of reducing dependence on traditional fuels.
    While these factors are leading to an increasing preference for electric vehicles, it’s important to note that individual preferences vary and considerations such as charging infrastructure, vehicle range and affordability play an important role in the decision-making process. As technology continues to advance and the EV market matures, consumer preferences are likely to evolve further.
  • 18.

    What should I know about EV?

    Understanding electric vehicles (EVs) involves everything from their technology and components to their benefits and considerations. Here are some key things you should know about electric vehicles:
    ① Battery technology: The core of electric vehicles is the battery. The battery stores electrical energy and powers the electric motor. Understanding battery technology, including type (e.g., lithium-ion), capacity, and charging capabilities is critical.
    ② Electric motor: Electric vehicles use electric motors for propulsion. Different types of motors (e.g. AC induction motors, permanent magnet motors) have different performance characteristics. The efficiency of the electric motor is critical to the overall efficiency of the vehicle.
    ③ Cruising range: Cruising range refers to how far an electric vehicle can travel on a single charge. It is affected by factors such as battery capacity, driving conditions and driving habits. Improvements in battery technology continue to extend the range of electric vehicles.
    ④ Charging infrastructure: Understanding charging infrastructure is crucial. Charging options include Level 1 (standard household socket), Level 2 (dedicated charging station) and Level 3 (DC fast charging). Knowing when and where to charge is important for electric vehicle owners.
    ⑤ Charging time: Charging time varies according to the charging level and the battery capacity of the electric vehicle. While Level 1 charging is slower, Level 2 and DC fast charging offer faster charging times. Charging time also depends on the battery's state of charge.
    ⑥ Energy efficiency: Electric vehicles are generally more energy-efficient than traditional internal combustion engine vehicles. The efficiency of electric vehicles is typically measured in miles per gallon of gasoline equivalent (MPGe) or kilowatt hours per 100 miles (kWh/100 miles).
    ⑦ Regenerative braking: Many electric vehicles have a regenerative braking function that recovers energy during braking and deceleration, thereby improving overall energy efficiency and extending driving range.
    ⑧ Cost of ownership: While the upfront cost of an electric vehicle may be higher, the cost of ownership may decrease over time due to reduced fuel and maintenance expenses. Government incentives and rebates may also help offset initial costs.
    ⑨ Environmental impact: Electric vehicles have zero exhaust emissions, which helps reduce air pollution and greenhouse gas emissions. However, the environmental impact depends on factors such as charging source and battery production.
    ⑩ Maintenance: Electric vehicles generally have fewer moving parts than traditional vehicles, so maintenance requirements are lower. Regular inspections of batteries, electric motors and other components are still necessary.
  • 19.

    What is the important part of EV?

    Electric vehicles (EVs) are made up of various components, each of which plays a vital role in their operation and performance. Some of the most important components of electric vehicles include:
    ① Battery pack: The battery pack is a key component that stores electrical energy and provides power to the electric motor. The type, capacity and efficiency of the battery significantly affect the range and overall performance of an electric vehicle.
    ② Electric motor: The electric motor is responsible for converting the electrical energy of the battery into mechanical energy to drive the vehicle. The type of motor (e.g. brushless DC motor, induction motor) and its efficiency are important factors in determining vehicle performance.
    ③ Power electronics: This includes components such as inverters and converters, which manage the flow of electrical energy between batteries and electric motors. High-efficiency power electronics help improve overall system efficiency.
    ④ Charging system: The charging system includes components such as car chargers and charging ports. It determines how quickly an electric vehicle can charge its battery and may support various charging standards such as Level 1, Level 2 and DC fast charging.
    ⑤ Controller: The controller manages and coordinates the operation of various components in electric vehicles to ensure smooth and efficient performance. It plays a vital role in regulating the transfer of power from the battery to the electric motor.
    ⑥ Regenerative braking system: Many electric vehicles are equipped with regenerative braking systems that can recover energy during braking and deceleration. The system improves energy efficiency and helps extend driving range.
    ⑦ Thermal management system: Maintaining optimal operating temperature is critical to the life and efficiency of batteries and other components. Thermal management systems help regulate temperature by cooling or heating as needed.
    ⑧ Vehicle Control Unit (VCU): The VCU acts as the brain of the vehicle, processing data from various sensors and systems to control the overall operation of the electric vehicle. It manages factors such as acceleration, braking and energy distribution.
    ⑨ Transmission (in some cases): While many electric vehicles are equipped with a single-speed transmission due to the high-torque characteristics of the electric motor, some may include a multi-speed transmission to optimize efficiency under different driving conditions.
    ⑩ Safety systems: Electric vehicles are equipped with safety features, including airbags, anti-lock braking, stability control and anti-collision systems, to ensure the safety of the occupants and others on the road.
    Each of these components contributes to the overall functionality, efficiency, and performance of an electric vehicle.The integration and optimization of these components is critical to building reliable and competitive electric vehicles.
  • 20.

    Why high-voltage is used in EV?

    Electric vehicles (EVs) use high voltage for a variety of reasons, it helps improve various aspects of their performance and efficiency. Here are some key reasons for using high voltage systems in electric vehicles:
    ① Efficient power transmission: Power loss in electrical systems is proportional to the square of the current and inversely proportional to the voltage. By using higher voltages, electric vehicles can transmit power more efficiently. Lower current levels reduce resistive losses in cables and components, allowing for more efficient power transfer from the battery to the electric motor.

    ② Reduce current heating: Ohmic heating (I²R loss) in a conductor is directly related to the square of the current flowing through the conductor. Higher voltage allows electric vehicles to use lower current for the same power, thereby reducing heat in electrical components such as cables and connectors. This is particularly important to minimize energy losses and optimize the efficiency of the entire electric drivetrain.

    ③ Lighter and smaller components: Higher voltage brings lower current levels, thereby reducing heat and allowing the use of smaller and lighter electrical components. This includes cables, connectors and other components of the electric powertrain. Smaller, lighter components help reduce the overall weight of the vehicle and improve energy efficiency and range.
    ④ Power electronics efficiency: Power electronics (including inverters and converters) that control the flow of electrical energy between batteries and motors are generally more efficient at higher voltages. This increase in efficiency helps maximize electric drivetrain performance and ensure efficient power conversion.
    ⑤ Battery design: Higher voltage battery systems can be more efficient in terms of energy density and power output. Electric vehicle batteries are designed with multiple cells connected in series to achieve the required voltage level. This series connection allows for higher overall system voltage, thereby increasing electric vehicle performance and efficiency.

    ⑥ Fast charging capability: Higher voltage systems are usually associated with fast charging capabilities. Many fast charging stations provide high-voltage direct current to quickly charge electric vehicle batteries. The ability to accept higher voltages facilitates faster charging times, making electric vehicles more practical and convenient for users.

    In summary, using high voltage in electric vehicles helps improve efficiency, reduce power losses, make components smaller and lighter, and enable faster charging capabilities. Together, these factors improve the overall performance and survivability of electric vehicles compared to low-voltage systems.
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