Battery Pack Frame Layout for Airtight CMU Mounting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery packs suffer from reduced airtightness and thermal runaway issues due to the arrangement of harnesses and CMUs, which can propagate high temperature and pressure gases, flames, and metal particles, hindering optimal design and safety.
Innovation Solution
A battery pack design featuring fastening recesses on vertical and horizontal frames to secure rigidity and airtightness, with CMUs fastened to these recesses, and a double shielding structure using module and battery pack covers to prevent gas and flame propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If harnesses are arranged to pass through the upper portion of the inner frame, then electrical connectivity is achieved, but airtightness of the internal space is reduced
Solution Approach 1:
The patent extracts the harmful element (harness passing through the frame) and relocates it to a separate module (CMU mounted on the inner frame). This extraction eliminates the penetration hole in the frame structure, thereby restoring airtightness while maintaining electrical connectivity functions through the separated CMU module.
Solution Approach 2:
The patent segments the electrical connectivity function from the structural frame by mounting the CMU (which contains harnesses) as a separate module on the inner frame. This segmentation allows the frame to maintain its airtight structural integrity while the CMU module handles the electrical connections, resolving the contradiction between airtightness and connectivity.
2Productivity
If CMU is mounted in the empty space inside the center frame, then space utilization is improved, but airtightness toward the center frame is degraded
Solution Approach 1:
The patent employs a sealing member (flexible sealing element) at the interface between the CMU module and the inner frame. This sealing film/membrane accommodates the CMU mounting while maintaining the airtight barrier, allowing space utilization improvement without sacrificing airtightness toward the center frame.
3Productivity
If the internal space is maximized by reducing frame size, then energy density is improved, but rigidity of the frame is reduced
Solution Approach 1:
The patent incorporates fastening recesses and fixing units during the frame design phase, enabling the CMU to be firmly mounted on the inner frame. This preliminary structural preparation allows the frame to maintain adequate rigidity through strategic reinforcement at mounting points while keeping the overall frame size minimized to maximize internal space and energy density.
Data Source
AI summary
Disclosed is a battery pack in which a fastening recess is provided on a side surface of a vertical frame and a CMU is fastened to the fastening recess, thereby securing rigidity of the vertical frame and maximizing an internal space of the battery pack.