Battery Pack Module Arrangement for Underfloor Installation
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Solution Overview
Problem
There is a need for a battery pack with high energy density to improve space efficiency, particularly for use in hybrid electric vehicles and electric vehicles, where conventional battery packs are not optimally suited for underfloor installation.
Innovation Solution
A battery pack design featuring a plurality of stacked battery cells surrounded by a casing member, connected via a connection member that allows modules to be arranged in a single layer, reducing the overall height and enabling efficient space utilization, with optional stoppers for precise alignment and potential gap formation for cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional battery packs are used with supporting frames, then structural strength is maintained, but energy density and space efficiency deteriorate
Solution Approach 1:
The patent removes the supporting frame from the battery pack structure, extracting the non-functional element that occupied valuable space. The battery modules are directly mounted to the vehicle floor without requiring a separate supporting frame, thereby eliminating dead weight and increasing energy density while maintaining necessary structural integrity through alternative mounting methods
Solution Approach 2:
The battery module casing serves multiple functions: it provides structural protection for the battery cells, acts as a mounting interface for direct attachment to the vehicle floor, and eliminates the need for separate supporting frames. This multi-functionality resolves the contradiction by combining structural support and battery housing into a single integrated component
2Quantity of substance
If battery modules are arranged in multiple layers, then energy density is improved, but ease of installation and cooling efficiency worsen
Solution Approach 1:
The patent transitions from vertical stacking (multiple layers) to horizontal arrangement (single layer with extended length), changing the dimensional configuration of battery module placement. This allows the battery pack to achieve high energy density through increased horizontal utilization of floor space rather than vertical stacking, thereby simplifying installation and improving cooling access
3Quantity of substance
If battery modules are closely packed without gaps, then space efficiency is improved, but heat dissipation capability deteriorates
Solution Approach 1:
The patent implements localized gaps between adjacent battery modules at specific positions where thermal management is critical, rather than maintaining uniform spacing throughout. This allows heat dissipation channels to be created precisely where needed without significantly compromising overall space efficiency, as the gaps are strategically positioned to maximize cooling effectiveness
Data Source
AI summary
A battery pack includes a plurality of battery modules, each battery module having a plurality of stacked battery cells and a casing member surrounding the plurality of battery cells, and a connection member connecting the plurality of battery modules to each other.