Battery Pack Stack Layout With Continuous End Plate Reinforcement
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Solution Overview
Problem
Conventional battery packs lack an efficient configuration for mounting stacks of battery cells, which compromises the strength and stability of the case, leading to suboptimal performance.
Innovation Solution
The battery pack design includes multiple stacks of battery cells arranged side by side with end or intermediate plates and restraint members that engage with the case's side walls, allowing for improved mounting efficiency and structural reinforcement, while also being elastically deformable to enhance stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional battery pack configuration is used, then manufacturing is simpler, but mounting efficiency of battery stacks is insufficient and case strength is compromised
Solution Approach 1:
The end plates of adjacent stacks are merged to form a continuous structure that spans across multiple stacks. This continuous end plate structure simultaneously improves mounting efficiency by providing a unified mounting surface and enhances case strength by creating a rigid structural element that reinforces the entire battery pack assembly.
Solution Approach 2:
The continuous end plate structure serves multiple functions: it acts as a mounting surface for securing stacks, provides structural reinforcement for the case, and creates engagement interfaces with side walls. This multi-functionality resolves the contradiction by achieving both improved mounting efficiency and enhanced case strength through a single integrated structure.
2Strength
If additional structural components are added to improve case strength, then structural integrity improves, but device complexity increases
Solution Approach 1:
The end plates are merged to form a continuous structure that integrates multiple functions into a single component. This eliminates the need for separate reinforcement elements or additional structural components, thereby improving structural integrity without increasing device complexity.
Solution Approach 2:
The continuous end plate structure performs multiple structural functions simultaneously: it reinforces the case, provides mounting surfaces, and creates engagement interfaces. This multi-functionality allows the structure to achieve high structural integrity without requiring additional specialized components, thus avoiding increased complexity.
3Productivity
If stacks are arranged closely to increase inner space utilization, then mounting efficiency improves, but structural stability deteriorates
Solution Approach 1:
The end plates of closely arranged stacks are merged to form a continuous structure that spans across the stacks. This continuous structure acts as a unifying element that stabilizes the closely arranged stacks, allowing them to be positioned close together for improved mounting efficiency while maintaining structural stability through the reinforcing continuous end plate.
Solution Approach 2:
The continuous end plate structure provides both mounting functionality for efficient stack arrangement and structural stabilization for closely positioned stacks. This dual functionality resolves the contradiction by enabling close stack arrangement while simultaneously providing the structural support needed to maintain stability.
Data Source
AI summary
A battery pack includes: a first stack and a second stack; and a case member provided with an inner space that accommodates the first stack and the second stack and a side wall that defines the inner space, wherein each of the first stack and the second stack includes a plurality of battery cells arranged side by side in a first direction, an end plate located at an end portion of the plurality of battery cells, and a restraint member that restrains the plurality of battery cells and the end plate along the first direction, the first stack and the second stack are provided to be arranged side by side in a second direction orthogonal to the first direction, and the end plates arranged side by side in the second direction are engaged with each other, and the end plates continuously extend across the inner space along the second direction.