Battery Pack Insulating Frame With Heat-Conductive Sheet Layout
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Solution Overview
Problem
Existing battery packs face challenges in forming insulating structures with high withstand voltage and low dielectric breakdown, especially when used at high operating voltages.
Innovation Solution
The battery pack incorporates a frame with electrical insulating properties, a sheet member with higher thermal conductivity, and a close contact portion to form a transmission path for heat and to enhance electrical insulation, thereby reducing the risk of dielectric breakdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a frame with electrical insulating property is used to form an insulating structure, then the withstand voltage is improved, but the heat dissipation performance deteriorates
Solution Approach 1:
The battery pack structure is segmented into distinct functional zones: the frame provides electrical insulation and structural support, while separate sheet members (heat dissipation sheet and insulating sheet) are positioned between the battery module and the frame. This segmentation allows each component to specialize in its primary function without compromising the other.
Solution Approach 2:
Sheet members are introduced as intermediary components between the battery module and the frame. These sheet members serve dual purposes: they facilitate heat dissipation from the battery module while maintaining the electrical insulation provided by the frame. The intermediaries resolve the contradiction by mediating between thermal and electrical requirements.
2Reliability
If the frame is designed to provide high electrical insulation, then dielectric breakdown is prevented, but the structural complexity increases
Solution Approach 1:
The frame integrates multiple functions: it provides the structural skeleton of the battery pack, offers electrical insulation, and supports the battery module. By merging these functions into a single component, the design reduces overall structural complexity while maintaining high dielectric breakdown resistance.
Solution Approach 2:
The frame is designed as a multi-functional component that simultaneously serves as a structural support, an electrical insulator, and a mounting platform for the battery module. This universality eliminates the need for separate components for each function, thereby reducing structural complexity while ensuring reliable electrical insulation.
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 effectively enhances the insulating structure's withstand voltage and prevents dielectric breakdown, ensuring reliable operation at high voltages while efficiently dissipating heat.
Implementation Method 1
The sheet member has higher thermal conductivity than the frame, and forms at least a part of a transmission path of heat from the battery module to an outside
Implementation Method 2
The frame has an electrical insulating property... it is required to form an insulating structure having high withstand voltage (dielectric strength) by the battery pack, and it is required to form an insulating structure in which dielectric breakdown hardly occurs
Data Source
AI summary
According to one embodiment, a battery pack includes a battery module, a frame and a sheet member. The battery module includes a plurality of batteries, and includes a module bottom surface. The frame and the sheet member have electrical insulating property, and a frame sidewall of the frame forms a storage space of the battery module. A frame protrusion portion protrudes from the frame sidewall to the inner peripheral side and supports the battery module from a side toward which the module bottom surface faces. The frame forms a through-hole having a protrusion end of the frame protrusion portion as at least a part of an edge. The sheet member is in close contact with the module bottom surface of the battery module.