Battery Module Thermal Path for Switch and Voltage Tap Heat
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Solution Overview
Problem
Battery modules face challenges in effectively removing heat from switching devices and positive voltage taps, leading to high temperatures and reduced service life, especially under high current demands.
Innovation Solution
The battery module design incorporates thermally conductive connecting elements and a thermally conductive compensation material within a receptacle in the housing, allowing for efficient heat dissipation from the switching device and positive voltage tap, with the connecting elements made from materials like copper or aluminum and the compensation material being electrically insulating to prevent short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If switching devices conduct maximum current of the battery module, then the switching device can effectively regulate voltage and control current flow, but the switching device generates comparatively large amounts of heat that reduce service life
Solution Approach 1:
The patent extracts the heat dissipation function from the switching device itself and implements it through separate thermal management components. The switching device focuses on electrical control while dedicated heat sinks and thermally conductive materials handle the thermal management, allowing the switching device to operate at high power without being constrained by its own heat generation
Solution Approach 2:
The patent introduces thermally conductive connecting elements and compensation materials as intermediaries between the switching device and the environment. These intermediary components facilitate efficient heat transfer from the switching device to heat sinks or cooling structures, enabling effective thermal management while maintaining electrical functionality
2Loss of energy
If heat is removed via convection to ambient air, then the switching device can dissipate heat, but the heat removal efficiency is insufficient under high current demands
Solution Approach 1:
The patent replaces passive convective heat dissipation with active thermal conduction pathways. By introducing thermally conductive connecting elements with high thermal conductivity, the system transitions from relying on natural convection to utilizing direct thermal conduction, significantly improving heat removal efficiency under high current conditions
Solution Approach 2:
The patent employs composite thermal management structures combining different materials with complementary properties. The thermally conductive connecting elements are made from materials optimized for heat conduction, while compensation materials provide both thermal and electrical functions, creating a composite system that achieves superior heat dissipation performance
3Productivity
If the positive voltage tap of the battery cell is subjected to high thermal loading, then the battery module can handle high current, but the maximum temperature at the positive voltage tap increases and reduces service life
Solution Approach 1:
The patent applies local thermal management to the positive voltage tap by positioning thermally conductive connecting elements and compensation materials specifically at this high-temperature zone. This localized approach targets the critical area experiencing high thermal loading, effectively reducing the maximum temperature at the positive voltage tap without requiring system-wide thermal management changes
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 enables reliable heat removal from the switching device and positive voltage tap, maintaining low maximum temperatures and extending the service life of the battery module even under high current conditions.
Implementation Method 1
A compensation material of thermally conductive design is furthermore expediently arranged in the receptacle
Implementation Method 2
The first connecting element and/or the second connecting element are received in a thermally conductive manner in a receptacle of the housing of the battery module
Data Source
AI summary
A battery module having a plurality of battery cells (2), in particular lithium-ion battery cells (20), which are each electrically conductively interconnected with one another in series and/or in parallel, and a switching device (3), which has a first terminal (31) and a second terminal (32), wherein a first connecting element (41) of electrically conductive design electrically conductively connects the first terminal (31) to a voltage tap (5) of a battery cell (2, 21) arranged at an end and a second connecting element (42) of electrically conductive design electrically conductively connects the second terminal (32) to a voltage tap (6) of the battery module (1), wherein the first connecting element (41) and/or the second connecting element (42) are received in a thermally conductive manner in a receptacle (7, 71, 72) of the housing (10) of the battery module (1).