Battery Pack Insulation Structure for Cell Temperature Uniformity
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Solution Overview
Problem
Existing battery packs face challenges in improving cooling performance and safety, particularly in reducing temperature deviations between the top and bottom portions of electrode assemblies, which can lead to safety issues and reduced lifespan.
Innovation Solution
A battery pack design incorporating a cooling plate, insulation members with high thermal conductivity, and heat transfer parts to manage heat distribution, including a first heat transfer part with a support part bent at an angle and a second layer with lower conductivity to enhance heat transfer and insulation, along with a thermal interface material for efficient cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cooling plate is placed at the bottom of battery cells, then cooling performance at the bottom is improved, but temperature deviation between top and bottom portions of electrode assembly increases
Solution Approach 1:
The insulation member is provided with a first heat transfer part having high thermal conductivity in a specific region (first region) to enhance heat transfer from the electrode assembly to the cooling plate, while other regions maintain insulation properties. This localized differentiation of thermal properties allows targeted heat removal without compromising overall insulation performance.
Solution Approach 2:
The insulation member combines materials with different thermal conductivities in a composite structure - an insulating material as the base with a first heat transfer part made of high thermal conductivity material. This composite approach enables simultaneous heat transfer enhancement and thermal insulation in different regions of the same component.
2Temperature
If an insulation member is provided between battery cells, then thermal insulation is improved, but heat transfer from electrode assembly to cooling plate deteriorates
Solution Approach 1:
The insulation member is provided with a first heat transfer part having high thermal conductivity in a specific region (first region) to enhance heat transfer from the electrode assembly to the cooling plate, while other regions maintain insulation properties. This localized differentiation of thermal properties allows targeted heat removal without compromising overall insulation performance.
Solution Approach 2:
The insulation member combines materials with different thermal conductivities in a composite structure - an insulating material as the base with a first heat transfer part made of high thermal conductivity material. This composite approach enables simultaneous heat transfer enhancement and thermal insulation in different regions of the same component.
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
The design effectively reduces temperature deviations within the battery cells, improving cooling performance and safety by preventing heat generation and deterioration, thereby extending the lifespan of the battery pack.
Implementation Method 1
a first heat transfer part (620) provided between the long side of one of the battery cells (100) and the long side of the insulation part (610), and having a higher thermal conductivity than the insulation part
Implementation Method 2
a cooling plate (700)... on one side of the battery cells
Implementation Method 3
an insulation member (600)... having an insulation part (610), for example between adjacent battery cells
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A battery pack may include battery cells; a cooling plate on one side of the battery cells; and an insulation member having an insulation part, a pair of first heat transfer parts on both sides of the insulation part, and a first layer in at least a portion of the first heat transfer part and having a higher thermal conductivity than the insulation part. A temperature deviation between top and bottom portions of an electrode plate inside a cell can be reduced, thereby improving the cooling performance of the cell. In addition, the lifespan of a cell can be extended by improving cooling performance, and the safety of a battery pack can be improved by preventing events such as deterioration and heat generation.