Laminated Bus Bar For Electric Vehicle Power Electronics
Products Description
Laminated Bus Bar for Electric Vehicle Power Electronics is essentially a multi-layered composite power transmission component. Their unique laminated structure endows them with electrical and mechanical characteristics unmatched by traditional copper busbars:
Multi-layer alternating lamination: Conductor and insulation layers are tightly laminated, forming low-impedance current paths while controlling interlayer spacing to optimize electric field distribution.
Low parasitic inductance design: Closely adjacent positive and negative electrodes significantly reduce loop area, suppressing voltage spikes and switching losses.
High insulation reliability: Utilizing high-voltage resistant insulating film materials ensures safe isolation under high-voltage fast charging and complex operating conditions.
Thermal management compatibility: The flat structure facilitates integration with heat sinks or liquid cooling systems, achieving efficient heat conduction.
Combination of flexibility and rigidity: Flexible transition sections can be designed locally to adapt to the vibrations of the electric vehicle chassis and limited space layouts.
Application Advantages: Breaking Through Scenario-Based Challenges in Vertical Industries
| Electric Vehicle Main Drive Inverters | Facing the highest frequency switching conditions and the most severe vibrations. Our flexible stress-relief integrated multilayer bus protects SiC chips through an extremely low inductance design and perfectly adapts to water-cooled plates and module stacking, ensuring no degradation of interlayer insulation under extreme thermal cycling. |
| UPS Uninterruptible Power Supply Servers | Space is extremely limited, and long-term full-load operation is required. Our high-power-density multilayer bus integrates the complex DC bus between battery packs, rectifiers, and inverters into a single direct-connect module, greatly simplifying the internal wiring of the UPS, reducing overall temperature rise, and improving the continuity of power supply in data centers. |
| On-Board Chargers (OBCs) and DC/DC Converters | Supporting multiple circuits and voltage levels. Our multi-layer, multi-channel composite busbar enables physical isolation and parallel transmission of high-voltage DC, low-voltage auxiliary, and signal shielding within a single laminate, facilitating integrated power supply design. |
| Energy Storage Converter (PCS) | Operating under constant high current and grid harmonic impacts, our large-section, thick copper laminated busbar, through optimized plate thickness and interlayer thermal resistance, ensures that high current does not cause localized overheating, guaranteeing stable grid connection of the energy storage system for over a decade. |
Design Advantages
High Topological Freedom: Based on the inverter's three-phase bridge layout, the Laminated Bus Bar for Router Backplane Distribution can be designed with a two- to four-layer structure, integrating the DC positive, DC negative, and three-phase outputs into a single component, eliminating the need for multiple discrete connectors.
Precise Impedance Matching: For power modules with multiple discrete MOSFETs or IGBT chips connected in parallel, the parasitic parameters of each device's drive and current loops must be as consistent as possible. The multilayer busbar, through the design of symmetrical current switching paths and equal loop lengths, maintains a balance of parasitic inductance and resistance between parallel branches, avoiding localized overheating or device failure caused by uneven current distribution.
Thermal Expansion Matching: Copper and insulating materials have different coefficients of thermal expansion, which can generate interlayer thermal stress during drastic temperature changes. During the design phase, by appropriately selecting insulating materials (such as PI, whose coefficient of thermal expansion is similar to copper) and flexible adhesive layers, as well as controlling the overall dimensions of the Laminated Bus Bar for Telecom Power Distribution and the constraints on mounting points, the risk of delamination caused by thermal cycling is effectively reduced.
Designed for automated assembly: Details such as positioning holes, anti-misalignment grooves, and mounting guide bevels on the Power Distribution Unit BusBars ensure precise integration with customers' automated production lines. The cross-sectional shape and embossed contact surface of the connection terminals guarantee reliable contact with the power module pins.
Manufacturing Process: Precision Refinement of Micron-Level Lamination and Zero-Defect Encapsulation
| Precision Micro-punching and Laser Cutting | The conductor layer is stamped using high-precision cemented carbide progressive dies or cut with fiber lasers to ensure burr-free and micro-crack-free edges. This is the first line of defense against tip discharge and insulation layer puncture. |
| Plasma Surface Activation Treatment | Before lamination, the copper foil and insulating film are bombarded with atmospheric pressure plasma to thoroughly remove microscopic oil and oxide layers from the surface and significantly increase surface energy, ensuring maximum wetting of the subsequent hot melt adhesive and eliminating the risk of interlayer delamination. |
| Vacuum Hot Press Lamination and Curing | This is the core closed-loop process. The pre-assembled multilayer is fed into a vacuum hot press. Under specific temperature and pressure curves, the insulating film melts and flows under vacuum, filling all microscopic gaps and expelling air bubbles. Laminated Bus Bar for Internet Router Backplane then cross-links and cures, forming an irreversible, dense whole. |
| High-pressure potting and coating at the ends | The exposed insulation interface on the sides of the electrode plates is a vulnerable point to environmental corrosion. We use an automated dispensing process to seal the ends with high-insulation epoxy resin or perform overall Parylene vapor deposition coating to build the ultimate armor against moisture, salt spray, and dust. |
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From conductor structure design and insulation scheme optimization to mass production verification, our engineering team can deeply participate in the customer's project development phase, providing customized Laminated Bus Bar for Telecom Power Distribution solutions that meet actual application conditions, helping your equipment achieve stable mass production and long-term reliable operation more quickly.
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