Series 2 : Teardown Analysis of the 20kW DC Charger Power Module
Drivers: More Than Just Discharging the Gate The Division of Labor Logic Between UCC27524A and NCP81071B “Do you think a driver is just a ‘switch’? In fact, it determines the system’s response speed, EMI level, and efficiency ceiling.” In high-voltage, high-current applications like 20kW charging modules, whether MOSFETs/IGBTs are “well-driven” (i.e., operate optimally) hinges […]
Series 1 : Teardown Analysis of the 20kW DC Charger Power Module
Amplifiers, Supporting 20kW Power Module Current Detection The “Duet” of OPA2171 and AMC1200B “Analog signals never lie—you just need to understand their language.” In a DC charging module, accurate current sampling is not only crucial to control precision, but also directly impacts the safety and stability of the entire system. And the combination of OPA2171 […]
The Coordination Mechanism between SECC and EVCC
Detailed Explanation of Circuit Knowledge for New Energy Charging Systems The Coordination Mechanism between SECC and EVCC Amid the rapid development of new energy vehicles, the charging system serves as a crucial link connecting the power grid and vehicles. Its circuit design and protocol interaction directly impact charging efficiency, safety, and compatibility. Among its components, […]
7 Steps to Identify Common Faults of EV Charger
With the increasing popularity of electric vehicles (EVs), the demand for EV charger is also growing. However, charging modules may experience some faults and damage after long-term use. In this regard, how should users judge and respond? Professionals believe that charging modules generally encounter six common faults during use, which are module protection, module failure, […]
The Dilemmas and Challenges of 800V EV Charger
In today’s era of rapidly developing electric vehicles (EVs), high-power EV charger, as energy supply stations for EVs, are becoming increasingly prominent in terms of importance. With the advancement of technology, the charging voltage has gradually increased from several hundred volts initially to 800V or even higher at present. This trend has sparked extensive discussions: […]
What should we pay attention to in daily maintenance to prevent the “explosion” or “zhaji” of EV charger power modules?
Precautions for Daily Maintenance of EV Charger Power Modules (to Prevent Severe Damage/”Explosion”) In response to the causes of EV Charger power module severe damage (“explosion”) mentioned in the previous article, daily maintenance should focus on heat dissipation, cleaning, moisture prevention, connection fastening, and status monitoring: 3. Regular Inspection of Electrical Connections 4. Conduct Preventive […]
What are the causes of EV charger power module explosion?
The “explosion” or “zhaji”of EV chargerg power modules (usually referring to severe damage to power modules, such as cracking, burning, short circuits, etc.) is a serious fault that may be caused by various factors acting alone or together. Understanding the causes and conducting targeted maintenance are key to prevention. I. Main Causes of “Explosion” (Zhaji) […]
Whether harmonic mitigation is needed for EV charger
I. Harmonic Issues of EV Charger (I) Sources and Characteristics of Harmonics As equipment that converts electrical energy into a form suitable for charging electric vehicle (EV) batteries, charger generate harmonics during operation. This is particularly true for AC slow-charging piles: their internal rectifier circuits (which convert alternating current to direct current for battery charging) are […]
ISO 15118-2 Protocol – DC Segment
The ISO 15118-2 protocol specifies the digital communication protocol between electric vehicles (EVs) and Electric Vehicle Supply Equipment (EVSE). Since the communication components of this general-purpose equipment are the Electric Vehicle Communication Controller (EVCC) and the Supply Equipment Communication Controller (SECC), ISO 15118-2 describes the communication between these components. As part of the Combined Charging […]
Communication Protocol Between European Standard EV Charger and Electric Vehicles
Traditionally, the communication between electric vehicles (EVs) and EV charger is governed by two standards: DIN 70121 and ISO 15118. DIN 70121 is more prevalent in this field because it was released earlier than the current version of ISO 15118-2. However, ISO 15118-2 boasts more comprehensive functions, including “Plug and Charge” (plug-and-play charging), encryption, and […]