Core Viewpoint - The article analyzes the integrated module of the on-board charger and DC/DC converter in BYD's ATTO3 model, highlighting its engineering design, safety, reliability, and integration level [5][23]. Design Features - The module integrates all relevant power electronic devices, serving as a critical node connecting the vehicle's internal and external power systems [5]. - The design emphasizes compactness, with a protective cover and a customized protective pad for insulation and shock resistance [6][8]. - The internal structure is divided into two main areas: the on-board charger and the DC/DC converter, with control circuits integrated accordingly [10]. Key Components - Core components include a transformer for voltage conversion and electrical isolation, choke inductors for filtering and energy storage, and a capacitor group for the 400V system [12]. - The design incorporates potting agents for stability and heat dissipation, with power devices secured for reliability [13]. Design Highlights - The anti-shock design features customized shock-absorbing pads that match the components precisely, enhancing shock resistance [16]. - The integration of the on-board charger and DC/DC converter into a single module saves space and improves system efficiency [18]. - Safety considerations include comprehensive electrical isolation and explosion-proof design details, ensuring the safety of high and low voltage systems [21]. Summary - The integrated module of the on-board charger and DC/DC converter in BYD's ATTO3 demonstrates high engineering design standards, excelling in integration, safety, and reliability [23]. - Its compact structure meets the demands for vehicle space optimization, while detailed shock and protective designs adapt to complex usage environments [23]. - The design reflects BYD's technological accumulation in the power electronics field, providing valuable insights into the integration trends of electric vehicle power systems [25].