Inverter Capacitor Housing Pockets for Thermal Overload Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing inverter systems in electric vehicles face challenges in thermal management due to limited cooling capabilities, particularly for capacitors, leading to thermal overload and potential damage.
Innovation Solution
A heat sink system with cast aluminum chassis walls featuring extended pockets to enhance heat transfer from capacitor end caps, utilizing increased surface area and improved thermal conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cooling modules are used in inverter systems, then the system structure remains simple, but the thermal management capability is limited and cannot effectively prevent thermal overload of capacitors
Solution Approach 1:
The patent merges the cooling function with the capacitor housing structure by integrating heat sink pockets directly into the housing walls. This combination eliminates the need for separate cooling modules while providing effective thermal management through extended surface area contact with capacitor end caps, thereby improving reliability without significantly increasing device complexity
Solution Approach 2:
The patent introduces thermally conductive material as an intermediary between the capacitor end caps and the heat sink pockets in the housing walls. This mediator enhances heat transfer efficiency from the capacitors to the cooling structure, improving thermal management capability while maintaining a relatively simple integrated structure
2Reliability
If cooling modules with limited capability are used, then the device complexity is low, but thermal management is insufficient leading to thermal overload
Solution Approach 1:
The patent extends the cooling surface area by creating pockets that protrude into the housing interior space. This dimensional extension provides increased surface area for heat transfer without requiring a completely separate cooling module, thereby improving capacitor performance while limiting the increase in device complexity to structural modifications of existing housing walls
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
Enhances thermal management by providing a more efficient heat transfer path, reducing the risk of thermal overload and improving the reliability and performance of capacitors.
Implementation Method 1
a first surface configured to transfer heat from a first surface of a first capacitor and a second surface configured to transfer heat from a second surface of the first capacitor
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A system includes a heat sink for a capacitor assembly for an inverter, the heat sink including: a first pocket extending from a chassis of the inverter, wherein the first pocket includes a first surface configured to transfer heat from a first surface of a first capacitor and a second surface configured to transfer heat from a second surface of the first capacitor; and a second pocket extending from the chassis of the inverter, wherein the second pocket includes a first surface configured to transfer heat from a first surface of a second capacitor and a second surface configured to transfer heat from a second surface of the second capacitor.