Battery Pack Cross Beam and Frame for Cell Fixing
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Solution Overview
Problem
Existing battery packs face challenges in effectively limiting and fixing battery cells without damaging the structure during assembly and disassembly, leading to complex mounting processes and potential deviations in cell location.
Innovation Solution
A battery pack design featuring a box body with a cross beam dividing the accommodating chamber into units, buffer grooves and connecting portions, pressing strips, and fixing members to securely hold battery cells in place, ensuring stable assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If battery cells are fixed to the bottom plate by gluing, then the battery cell is secured in place, but it becomes difficult to disassemble the battery cell after glue coagulation, and may damage the bottom plate or affect adjacent cells
Solution Approach 1:
The invention divides the fixing function into two independent parts: positioning (achieved during assembly) and fixing (achieved through the frame body structure). The frame body with side plates creates modular accommodating units that can independently hold battery cells, allowing cells to be positioned and fixed without permanent adhesive bonding, thus enabling easy disassembly and replacement of individual cells.
Solution Approach 2:
The frame body acts as an intermediary structure between the bottom plate and the battery cells. Instead of directly gluing cells to the bottom plate, the frame body's side plates form accommodating units that receive and secure the cells. This intermediary structure provides both stable positioning and easy removability without damaging the bottom plate.
2Ease of manufacture
If battery cells are installed on the bottom plate without precise positioning structures, then the installation process is simple, but the battery cell location is prone to deviation
Solution Approach 1:
The frame body is pre-assembled with side plates forming accommodating units with specific dimensions and positions before battery cells are installed. These pre-formed accommodating units provide predetermined positioning spaces that guide battery cell placement, ensuring precise location without requiring complex positioning operations during cell installation.
Solution Approach 2:
The side plates of the frame body provide localized positioning features at specific locations where battery cells are to be installed. Each accommodating unit has tailored dimensions and characteristics matched to the specific battery cell type, providing precise local positioning while maintaining overall installation simplicity through the modular frame structure.
3Device complexity
If the module architecture is removed to simplify the PACK structure, then the space utilization rate is improved, but it becomes more difficult to limit and fix battery cells effectively
Solution Approach 1:
The frame body serves multiple functions simultaneously: it provides the structural framework of the battery pack, creates accommodating units for battery cells, provides positioning and fixing mechanisms through its side plates, and enables easy disassembly and maintenance. This multi-functional design achieves both structural simplification and effective cell fixation without requiring separate module structures.
Data Source
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AI summary
A battery pack and an electric device provided in the invention relate to the technical field of batteries. The battery pack includes a box body, a cross beam and a plurality of battery cell groups, the box body is provided with an accommodating chamber having an opening at an end, the box body includes a bottom plate and a frame body formed by a plurality of side plates in an enclosing manner, a direction perpendicular to the bottom plate is a first direction, and the plurality of side plates are fixedly connected to the bottom plate along the first direction; the cross beam is arranged in the accommodating chamber to divide the accommodating chamber into a plurality of accommodating units, a direction parallel to the bottom plate is a second direction, and the cross beam is perpendicular to the bottom plate and extends along the second direction; and the plurality of battery cell groups are arranged in the accommodating units along the second direction, a direction perpendicular to the cross beam is a third direction, and each battery cell group includes a plurality of battery cells stacked along the third direction, the cross beam abuts against at least one end surface of the battery cell group. In this way, the assembly of the battery cell groups is facilitated, and it is beneficial to fixing the battery cell groups.