Prismatic Cell Battery Pack Mounting for Adhesive-Free Serviceability
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Solution Overview
Problem
Existing battery packs face challenges in efficiently utilizing space, reducing costs, and facilitating easy maintenance while ensuring secure mounting and effective cooling of battery cells.
Innovation Solution
A battery pack design featuring a battery block with a cell array of prismatic cells constrained by side and end plates, which are fixed to a pack case using end and side brackets, eliminating the need for adhesives and allowing for easy removal and installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive is used to mount battery block to pack case, then mounting strength is improved, but removal difficulty increases and damage risk during removal increases
Solution Approach 1:
The mounting structure is segmented into modular components: the battery block, pack case, and removable fastening mechanism. This allows the battery block to be securely mounted during operation while enabling easy removal for maintenance without damage, resolving the contradiction between strong mounting and easy removal.
2Reliability
If complex mounting structure is used, then mounting reliability is improved, but device complexity increases and manufacturing cost increases
Solution Approach 1:
The complex adhesive bonding process and additional mounting components are extracted from the system. Instead, a simplified mechanical fastening structure is used that achieves reliable mounting through geometric interlocking and friction, reducing overall device complexity while maintaining mounting reliability.
3Quantity of substance
If more battery cells are mounted in same pack space, then energy density is improved, but heat transfer efficiency worsens and cooling becomes more difficult
Solution Approach 1:
The cooling approach transitions from two-dimensional surface contact to three-dimensional thermal management. The pack case structure incorporates thermal conduction paths through its walls and base, enabling heat transfer from battery cells in multiple directions and improving overall heat dissipation efficiency while accommodating more cells.
Data Source
AI summary
A battery pack including, in one example, a battery block including a cell array including a plurality of prismatic cells arranged in a row, a pair of side plates disposed on each of both sides of the cell array, and a pair of end plates disposed on each of front and rear surfaces of the cell array, wherein both ends of the end plates in the width direction are fixed to side brackets provided at both ends of the side plates in the longitudinal direction of the side plates, so that the cell array is constrained as a single block; and a pack case in which a plurality of the battery blocks are mounted, wherein the end plate includes an end bracket that is fixed to a mounting part provided in the pack case.