Three-Phase Terminal Base for EV Power Controller Heat Dissipation
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Solution Overview
Problem
Existing power control units for electric vehicles face challenges in efficiently dissipating heat from three-phase terminals, leading to reduced performance and potential damage to current sensors due to inadequate contact between terminals and heat sinks.
Innovation Solution
The power control unit incorporates three-phase terminals with a unique shape featuring a first flat portion, a curved portion, and a second flat portion, which ensures a predetermined gap with the contact surface, allowing for increased contact with a three-phase terminal base for efficient heat dissipation and integration of current sensors without additional brackets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the three-phase terminal is directly attached to the heat sink, then heat dissipation is improved, but the terminal cannot be properly positioned and contact reliability deteriorates
Solution Approach 1:
The patent introduces a three-phase terminal base as an intermediary component between the three-phase terminal and the heat sink. The base includes a positioning portion that fits into a positioning groove on the heat sink, ensuring accurate positioning and reliable contact. This mediator resolves the contradiction by providing both mechanical positioning reliability and thermal conduction path.
2Manufacturing precision
If additional brackets are used to position the terminal, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent merges the positioning function and the supporting function into a single three-phase terminal base component. The base integrates a positioning portion that engages with the positioning groove on the heat sink, eliminating the need for separate brackets. This consolidation reduces device complexity while maintaining positioning accuracy.
Solution Approach 2:
The three-phase terminal base serves multiple functions simultaneously: it positions the terminal accurately on the heat sink, provides mechanical support, and ensures thermal contact. This multi-functionality eliminates the need for additional dedicated positioning brackets, reducing overall structure complexity.
3Temperature
If the terminal is positioned closer to the heat sink, then heat dissipation is improved, but current sensors are exposed to harmful heat
Solution Approach 1:
The patent segments the terminal support structure into distinct functional zones: the three-phase terminal base provides thermal contact with the heat sink, while the current sensor mounting portion is positioned at a distance from the heat sink. This segmentation allows the terminal to be close to the heat sink for efficient heat dissipation while keeping current sensors away from harmful heat exposure.
4Ease of manufacture
If the terminal structure is simplified, then manufacturing cost is reduced, but positioning and contact reliability deteriorate
Solution Approach 1:
The patent combines multiple functions (positioning, support, and thermal contact) into a single three-phase terminal base component, reducing the number of parts and assembly steps. This integration simplifies manufacturing while maintaining contact reliability through the built-in positioning portion that engages with the positioning groove on the heat sink.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances heat dissipation performance of three-phase terminals and protects current sensors from heat damage, improving overall system reliability and reducing manufacturing costs.
Implementation Method 1
The second flat portion is connected to a fixed surface of the three-phase terminal base to be in contact with the fixed surface... allowing for increased contact with a three-phase terminal base for efficient heat dissipation
Data Source
AI summary
A power controller for a vehicle includes a power converter module, a three-phase terminal, and a three-phase terminal base. The three-phase terminal includes a first flat portion, a second flat portion, and a curved portion. The first flat portion is connected to a contact surface of a three-phase output terminal to be in contact with the contact surface. The second flat portion is connected to a fixed surface of the three-phase terminal base to be in contact with the fixed surface. The three-phase terminal has a shape such that a predetermined gap is provided between the first flat portion and the contact surface of the three-phase output terminal when the first flat portion is released from the contact surface of the three-phase output terminal while the second flat portion is being in contact with the fixed surface of the three-phase terminal base.