Battery Assembly Thermal Management via Metal Case Electrode Connection
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Solution Overview
Problem
High thermal conductivity is a challenge in battery assemblies for electric-powered vehicles due to heat dissipation limitations, which can lead to reduced conductivity, swelling, and increased risks of rupture or explosion, especially when multiple batteries are connected in series or parallel, as conventional designs often focus on areas with poor thermal conductivity.
Innovation Solution
A battery assembly with a metal case that directly connects the metal electrodes of battery cores for efficient heat dissipation, incorporating a fuse device for individual battery core failure isolation and a design with notches and perforations for reduced size and enhanced heat transfer, utilizing thermal conductive materials and phase change materials for improved heat management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple batteries are connected in series or parallel to supply high voltage and mega-current, then electric power output is improved, but heat generation increases leading to reduced conductivity and safety risks
Solution Approach 1:
The battery array is segmented into multiple battery cores arranged in parallel within the metal case, allowing heat to be distributed and dissipated from multiple contact points with the metal case rather than concentrating heat in a single location
Solution Approach 2:
The metal case serves multiple functions: it provides structural containment for the battery cores, acts as a thermal conduction path for heat dissipation, and serves as an electrode connection point, thereby addressing multiple requirements simultaneously
2Temperature
If conventional heat dissipation designs use cooling fins and forced air convection, then heat removal from lateral sides is improved, but thermal conductivity remains poor due to battery solution filling the space between central axis and lateral sides
Solution Approach 1:
Instead of attempting to improve heat dissipation from the lateral sides where thermal conductivity is poor, the invention inverts the approach by maximizing heat conduction through the axial direction where the battery core structure naturally provides better thermal pathways, with electrodes extending from the central axis to the top and bottom faces
Solution Approach 2:
The electrodes serve as thermal intermediaries, conducting heat from the battery core's central axis region (where heat is generated) directly to the top and bottom faces that contact the metal case, bypassing the poor thermal conductivity region filled with battery solution
3Temperature
If battery cores are arranged with gaps and cooling fins, then heat dissipation surface area is improved, but device volume increases
Solution Approach 1:
The metal case merges multiple functions into a single component: it provides the structural enclosure, serves as the thermal conduction medium, and acts as the electrode connection, eliminating the need for separate cooling structures and reducing overall volume
Solution Approach 2:
The battery cores are nested within the metal case in a compact parallel arrangement, with each battery core's electrodes making direct contact with the metal case, achieving efficient heat dissipation without requiring external cooling fins or additional space
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 solution enables efficient heat dissipation through optimal thermal conductivity paths, reduces the risk of battery core failure by isolating faulty units, and minimizes the overall size of the battery assembly, enhancing safety and versatility.
Implementation Method 1
the metal electrodes of the battery cores and the metal case are directly connected in a thermally conductive manner, thereby achieving efficient heat dissipation
Implementation Method 2
utilizing thermal conductive materials and phase change materials for improved heat management
Data Source
AI summary
The invention relates to a battery assembly with high thermal conductivity. The battery assembly comprises a metal case having a hollow accommodation cavity formed therein, a plurality of battery cores installed parallel to one another within the metal case, and a common electrode for connection to the other electrode in each of the battery cores. Each of the battery cores has two electrodes, with one of the electrodes that corresponds to those of the rest of the battery cores being connected in a thermally conductive manner to the metal case. The invention takes advantage of high thermal conductivity of metallic material and dissipates heat by connecting the metal case to the battery electrodes. The invention further comprises fixation troughs formed on the metal case, thereby reducing the size of the assembly.