Electric Vehicle Capacitor With Shared Terminals For IGBT And DC Bus
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Solution Overview
Problem
Current electric vehicle capacitors have complex internal electrode designs due to dual terminal connections to IGBT and DC bus, leading to high costs and inadequate vibration reliability, as industrial-grade capacitor designs do not account for vibration effects.
Innovation Solution
A capacitor design with multiple groups of capacitor cores connected via a pair of electrodes to both the DC bus and insulated gate bipolar transistor, featuring a simplified internal structure, reduced electrode count, and improved installation efficiency through strategically arranged slots and ridges for secure wire fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a capacitor has two pairs of connecting terminals (one pair for IGBT and another pair for DC bus), then the connection requirements are met, but the internal electrode design becomes complex and cost increases
Solution Approach 1:
The patent applies universality by designing a single pair of connecting terminals that can serve multiple functions - connecting to both IGBT and DC bus. This multi-functional terminal design eliminates the need for separate terminal pairs, thereby simplifying the internal electrode structure while maintaining all necessary connection capabilities.
2Ease of manufacture
If industrial-grade capacitor design is used, then manufacturing cost is reduced, but vibration reliability is insufficient
Solution Approach 1:
The patent applies local quality by differentiating the housing structure into different functional zones - a vibration-resistant main body for the capacitor core and separate terminal structures optimized for their specific functions. This localized optimization allows the capacitor to achieve vehicle-grade vibration reliability while maintaining manufacturing efficiency.
3Productivity
If multiple groups of capacitor cores are independently disposed, then installation efficiency is improved, but the number of connecting terminals increases
Solution Approach 1:
The patent applies merging by consolidating multiple terminal connection functions into a single shared pair of connecting terminals. Multiple capacitor core groups share these common terminals, which reduces the total number of terminals required while maintaining independent electrical connections for each core group, thereby improving installation efficiency without increasing terminal complexity.
Data Source
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AI summary
The present invention discloses an electric vehicle and a capacitor, the capacitor 100 is configured to be connected to a DC bus of an electric vehicle and an insulated gate bipolar transistor, comprising a housing (1), groups of capacitor cores and groups of connecting terminals (2). The capacitor comprises a plurality of groups of capacitor cores, multiple groups of capacitor cores are independently disposed in the housing (1), each group of the capacitor cores comprises at least one capacitor core; the capacitor comprises a plurality of groups of connecting terminals (2), multiple groups of connecting terminals (2) are disposed on the housing (1) and connected to multiple groups of capacitor cores in an one-to-one manner, and each group of connecting terminals (2) comprises a pair of electrodes protruding from the housing (1) such that the pair of electrodes can be connected to a DC bus of an electric vehicle and an insulated gate bipolar transistor.