DC Capacitor Busbar
The DC Capacitor Busbar is a core conductive connection component of the electrical system of new energy vehicles. It is designed specifically for use with film capacitors and is responsible for the transmission and distribution of electrical energy between the battery pack, motor controller, DC fast charging system and film capacitors. Its electrical performance, structural precision and working condition resistance directly determine the efficiency, stability and safety of the entire vehicle's electrical system. It is a key category that needs to be carefully controlled in the procurement and selection of core components for new energy vehicles.
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Product Introduction
DC Capacitor Busbar is a key electrical component used in new energy vehicles to connect the Battery Management System (BMS), motor controller, battery pack, film capacitors, and DC fast charging system. Its primary function is to achieve efficient power transmission and ensure the stable and safe operation of the electrical system. Through excellent resistance control, voltage withstand capability, current carrying capacity, and structural design, the busbar maintains long-term reliability even under complex operating conditions and is widely used in various electrical systems of new energy vehicles.
Manufacturing process
Following the principles of precision, standardization, and controllability.
Substrate Pretreatment
High-purity copper substrate is cleaned, dried, and straightened to remove oil, impurities, and oxide layers. Deformation is corrected to ensure a flat and uniform substrate, laying the foundation for subsequent busbar for Power Capacitor processing.
01
Precision Cutting and Forming
Based on design drawings, CNC equipment is used for precise cutting and forming, strictly controlling busbar for Busbar Film Capacitor dimensional tolerances within ±0.1-±0.3mm.
02
Insulation Layer Coating
High-precision lamination equipment is used to coat the conductive layer with a polyimide film, ensuring the insulation layer is wrinkle-free and intact, achieving reliable electrical isolation.
03
Multilayer Lamination
The conductive and insulating layers are laminated using a hot-pressing process. Temperature, pressure, and time are controlled to improve the overall structural stability and interlayer adhesion of the Capacitor Busbar.
04
Finished Product Finishing and Inspection
The busbar edges are finished and deburred. Product performance and dimensions are comprehensively tested. After passing inspection, the product is packaged and stored.
05
Technical parameters
Resistance: At standard ambient temperature (20℃), the resistance per unit length (1 meter) of busbar is typically between 0.001 and 0.01 Ω. The specific value depends on the material, thickness, and cross-sectional area of the conductive layer. This low resistance reduces power loss and improves energy efficiency, making it particularly suitable for high-current transmission environments.
Voltage Withstand Capacity: This busbar possesses excellent voltage withstand performance, with a rated withstand voltage range of 500-1500V. This meets the voltage requirements of new energy vehicle batteries, ensuring that the system will not experience electrical breakdown under normal operation and short-term overvoltage conditions, thus guaranteeing the safe and stable operation of the system.
Current Carrying Capacity: Taking a copper conductive layer busbar with a cross-sectional area of 50 square millimeters as an example, under ambient temperature of 40℃ and good heat dissipation conditions, the continuous current carrying capacity can reach 200-300A. The appropriate busbar specification needs to be selected based on the specific electrical system and heat dissipation design.
Dimensional accuracy: The dimensional accuracy of the busbar is strictly required, with tolerances controlled between ±0.1 and ±0.3 mm, to ensure precise assembly with film capacitors and other electrical components and avoid poor connection or degraded electrical performance due to dimensional deviations.
Application areas
BMS Connection
The busbar plays a crucial role in the battery management system, responsible for the transfer of electrical energy between the battery pack and the film capacitors. By precisely controlling the flow of electrical energy, the busbar improves the charging and discharging stability of the battery, optimizes battery performance, and extends battery life.
Motor Controller Connection
During motor operation, transfers the electrical energy stored in the film capacitors to the motor controller, ensuring efficient motor operation. Simultaneously, the busbar effectively suppresses electromagnetic interference, improving the reliability and stability of the motor control system.
Fast Charging System Connection
During fast charging of new energy vehicles, undertakes the task of high-current transmission, ensuring the efficiency and safety of the charging process. By optimizing the busbar design, energy loss and heat generation during charging are reduced, improving charging speed and efficiency, and shortening charging time.
Packaging and shipping
Our DC Capacitor Busbar packaging features anti-static, anti-collision, and moisture-proof designs. The inner layer is wrapped with pearl cotton, and the outer layer is sealed with reinforced cardboard boxes marked with product specifications and protective labels to prevent scratches and oxidation during transportation. We use professional industrial logistics for transportation, which is fully traceable. We will select appropriate transportation methods based on the product batch to ensure that the products are delivered intact and on time to the designated location, meeting the needs of project procurement schedules.
contact us
If you have needs for procurement, DC Capacitor Busbar selection, sample requests, or require detailed product information, please feel free to contact us. We will arrange a professional team to provide one-on-one service, customize suitable solutions, and ensure efficient supply, selection, and procurement.
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