Battery Cell Insulation Layer for Heat Dissipation and Isolation
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Solution Overview
Problem
Existing electrochemical energy storage cells face challenges in efficiently dissipating heat generated during charging and discharging due to uneven heat flow within the cell, limiting the effectiveness of external cooling devices.
Innovation Solution
Incorporating an insulation element made of electrically insulating and thermally conductive material between the cell coil and the housing, which facilitates heat transfer through the insulation element to the exterior for effective cooling, while preventing electrical short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cooling device is assigned to the side wall of the housing, then cooling function is provided, but heat dissipation effectiveness is limited due to uneven heat flow distribution
Solution Approach 1:
The housing is divided into functionally distinct regions: a base portion with high thermal conductivity material for heat dissipation, and side wall portions with insulation material for thermal isolation. This segmentation allows each region to perform its specialized function optimally.
Solution Approach 2:
Different thermal properties are assigned to different locations of the housing. The base portion uses material with high thermal conductivity to facilitate heat dissipation from the cell coil, while the side wall portions use insulation material with low thermal conductivity to prevent heat loss and maintain thermal isolation.
2Reliability
If insulation material is used between cell coil and housing, then electrical insulation is provided, but heat dissipation is reduced
Solution Approach 1:
The housing structure is segmented into a base portion and side wall portions, with different material properties assigned to each segment. The base portion uses high thermal conductivity material for heat dissipation, while side walls use insulation material for electrical and thermal isolation.
Solution Approach 2:
The base portion acts as an intermediary thermal pathway between the cell coil and the external environment. It provides a dedicated heat transfer route that does not compromise the insulation function of the side walls, effectively mediating between heat dissipation requirements and insulation requirements.
3Temperature
If high thermal conductivity material is used in the housing, then heat dissipation is improved, but electrical insulation between cell coil and housing is compromised
Solution Approach 1:
The housing is segmented into functional zones: the base portion uses high thermal conductivity material for heat dissipation, while the side wall portions use insulation material for both electrical insulation and thermal isolation. This spatial segmentation resolves the contradiction between heat dissipation and electrical insulation.
Solution Approach 2:
Different material qualities are applied locally to different regions of the housing. The base portion has high thermal conductivity for heat dissipation, while the side walls have low thermal conductivity and high electrical insulation properties, allowing each region to optimize for its specific function.
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 heat dissipation and temperature control within the cell, reducing the risk of thermal runaway and improving cell performance by ensuring uniform heat distribution and preventing electrical shorts.
Implementation Method 1
the at least one insulation element comprises an electrically insulating and thermally conductive material
Implementation Method 2
the at least one insulation element comprises an electrically insulating and thermally conductive material
Data Source
AI summary
An electrochemical energy storage cell includes: a housing; and at least one cell coil accommodated in the housing. The housing is closed at at least one end face by a cover. The cover forms a part of the housing. At least one insulation element is arranged between the at least one cell coil and the housing. The at least one insulation element is made of an electrically insulating and thermally conductive material.