Double-Side Cooling Power Module Input Terminal Segmentation
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Solution Overview
Problem
Conventional power modules with double-side cooling face complexity in circuit structure due to long current paths, leading to increased stray inductance and interference between signal and power terminals, which complicates the connection and efficiency of power transmission.
Innovation Solution
The proposed input terminal structure includes a plus plate divided into terminal areas connected to the anode of a battery, a minus plate divided into terminal areas connected to the cathode, and a separator made of insulation material, with bridge areas connecting these areas in a parallel configuration to minimize stray inductance and simplify the circuit structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If connection portions of power terminals are formed in up-and-down direction with signal terminals in parallel configuration, then power transmission capability is improved, but circuit structure becomes overly complex and interference between signal and power terminals increases
Solution Approach 1:
The power terminal connection portions are segmented into first connection portions on the upper circuit board and second connection portions on the lower circuit board. This segmentation allows the power terminals to be distributed across different boards, reducing the complexity of the overall circuit structure while maintaining parallel configuration for improved power transmission capability.
Solution Approach 2:
The connection portions are arranged in both vertical (up-and-down) and horizontal directions, creating a two-dimensional layout. This dimensional arrangement optimizes the circuit structure by reducing interference between signal and power terminals while maintaining effective power transmission paths.
2Adaptability or versatility
If current path length is increased to connect multiple semiconductor chips, then power distribution capability is improved, but stray inductance increases and efficiency decreases
Solution Approach 1:
The current path is segmented into multiple parallel paths through the first and second connection portions. Each path connects to specific semiconductor chips, allowing power distribution to multiple chips while keeping individual path lengths short, thereby reducing stray inductance.
Solution Approach 2:
Multiple connection portions are merged into a unified terminal structure where first connection portions and second connection portions work together. This merging creates efficient current paths that distribute power to multiple semiconductor chips without excessive path length, optimizing both distribution capability and reducing inductance.
Data Source
AI summary
An input terminal of a power module of double-side cooling includes: a plus plate which is divided into a plurality of first terminal areas coupled with any one or more of the plurality of semiconductor chips and is connected with an anode of a battery, wherein a first bridge area connects the plurality of first terminal areas with each other; a minus plate which is divided into a plurality of second terminal areas coupled with any one or more of the plurality of semiconductor chips which are not coupled with the plus plate and is connected with a cathode of the battery, wherein a second bridge area connects the plurality of second terminal areas with each other and is disposed adjacent to the first bridge area; and a separator which is made of an insulation material and disposed between the plus plate and the minus plate.