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Overview of BMS Implementation in Electric Vehicles
Since the Industrial Revolution, the automotive industry has flourished. However, traditional internal combustion engine vehicles have also imposed significant environmental impacts through their emissions. In 2021, transportation accounted for 10.4% of total societal carbon emissions. Green development has become a global consensus, with 197 countries signing the Glasgow Climate Pact to date, and 138 countries […]
Brief Discussion on Maximum Power Point Tracking (MPPT) and Current Acquisition in PV Inverters
PV inverters, serving as the core component and control center of photovoltaic systems, perform the critical dual roles of:Converting DC power from PV arrays into grid-compliant AC powerImplementing Maximum Power Point Tracking (MPPT) to maximize energy harvestTechnical Imperatives:Pmax Operation: The operational proximity to the photovoltaic module’s Maximum Power Point directly determines plant revenue generation.MPPT Functionality: Essential for dynamically […]
Brief Discussion on Lithium-Ion Battery Manufacturing Processes and Current Detection Requirements
1. Development Background of Lithium-Ion Batteries Emerging in the early 1970s, lithium-ion batteries revolutionized energy storage. Characterized by high energy density, extended cycle life, and long service duration, they power diverse applications: portable electronics, electric vehicles (EVs), smart wearables, and 3C products. China’s “Carbon Neutrality” pledge (September 22, 2020) accelerated policy-driven decarbonization efforts. By 2022: EV Market Expansion […]
Impact Analysis of Relay-Related Design on RCMU Products and Design Considerations
In AC charging piles, grid-tied inverters, and similar applications, residual current monitoring units (RCMUs) and relays are typically deployed adjacently. However, relay operation may interfere with RCMU performance. Particularly for charging pile products, such interference can lead to non-compliance with leakage current detection standards, adversely impacting product development timelines. Proactive design considerations are essential to […]
A Brief Discussion on the Topology and Leakage Current Requirements of Electric Vehicle On-Board Chargers (OBC)
1.Development Trends of On-Board Chargers (OBC) for Electric Vehicles China’s new energy vehicle (NEV) market has experienced rapid growth, with annual sales reaching 6.887 million units in 2022 (a 93.4% year-on-year increase), capturing 26% market share. According to the China Association of Automobile Manufacturers (CAAM), NEV sales are projected to exceed 9 million units in 2023, growing by 35% […]
Analysis and Modeling of Grid-Connection Impact Mechanisms in Inverters and RCMU Impact Withstand Test
1.Inverter Grid-Connection Impact Mechanism During the instant of grid synchronization in photovoltaic (PV) systems, grid-connected inverters frequently generate short-duration inrush currents. This phenomenon directly compromises grid stability and power quality, severely undermining inverter reliability. The core mechanism originates from transient deviations in output voltage versus grid voltage (amplitude, phase, or frequency) during synchronization, coupled with […]
Feasibility Analysis of IEC 60947-2 for Leakage Current Protection Standard Certification in EV Charging Equipment
1.Abstract European regions enforce stringent standards and certification requirements for EV charging equipment. This paper explores how to meet these standards—specifically addressing different IEC leakage current specifications—to reduce design complexity and costs. Through detailed analysis of mechanical coupling, electronic coupling, leakage current detection, and control circuitry within the standards, we propose a standards-compliant feasible solution. We invite readers to engage in discussion […]
Discussion on Requirements and Applicable Standards for Electric Vehicle On-Board Chargers (OBC)
The On-Board Charger (OBC) is an interface component of Electric Vehicles (EVs). It must interact externally through connections to either the public grid or dedicated EV supply equipment. These devices interface with the AC grid, and their ratings and requirements fall outside the manufacturer’s control. Consequently, any vehicle equipped with a built-in charger must comply […]
RCD Solution-Why Type A+6 or Type B
1. Abstract 1.1 The iterative upgrade of residual current detection requirements for European standard charging piles. As is well known, the standard for electric vehicle charging is IEC 61851 – ELECTRIC VEHICLE CONDUCTIVE CHARGING SYSTEM – Part 1: General requirements. In the early version of IEC 61851-1:2010, the protection against residual current was merely required […]
A Discussion on the Requirements of Electric Vehicle OBC and the Applicable Standards
1 Abstract To achieve the goals of peaking carbon emissions by 2030 and realizing carbon neutrality before 2060, the proportion of new types of power generation in the installed capacity of the power market is continuously increasing. By the end of 2022, the electricity generation from wind and photovoltaic (PV) sources in China reached 1.19 […]
