Battery Module Bracket Structure for Uniform Cell Expansion
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Solution Overview
Problem
Battery systems experience uneven expansion during charging, leading to pressure differences and potential overheating or explosion due to loss of electrolytic solution, as existing technologies fail to manage expansion uniformly across battery cells.
Innovation Solution
A battery module unit design featuring sequentially stacked brackets with a fixing bracket system that allows battery cells to expand symmetrically, using fasteners and connecting structures to maintain even expansion by accommodating movement along a stacking direction, ensuring that both sides of the fixing bracket expand equally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If battery cells are stacked in a battery module, then the battery system can store more energy, but uneven expansion occurs during charging leading to pressure differences and potential safety hazards
Solution Approach 1:
The battery module is segmented into multiple independent bracket units, each capable of accommodating expansion of battery cells within its section. This segmentation allows localized expansion management, preventing uneven expansion from propagating through the entire module, thus maintaining safety while preserving energy storage capacity.
Solution Approach 2:
The bracket structure incorporates dynamic expansion compensation mechanisms that allow the brackets to move and adjust position in response to battery cell expansion during charging. This dynamic adaptation ensures uniform expansion distribution across all battery cells, preventing pressure differences and maintaining structural integrity throughout the battery module.
2Stability of the object's composition
If rigid fixing structures are used to secure battery cells, then structural stability is improved, but expansion during charging causes pressure differences and potential failure
Solution Approach 1:
The fixing bracket structure transitions from a completely rigid design to a dynamic system that can adapt to battery cell expansion. The brackets incorporate movable components and expansion compensation mechanisms that maintain structural stability while allowing controlled movement to accommodate uniform expansion, preventing pressure differences and structural failure.
Solution Approach 2:
The bracket structure's physical parameters (position, shape, or volume) are changed in response to battery cell expansion. The brackets are designed to change their configuration dynamically, adjusting their parameters to maintain optimal fixing force while accommodating expansion, thus preserving both stability and reliability.
3Reliability
If expansion is restricted to maintain pressure balance, then safety is improved, but the battery system cannot accommodate natural expansion during charging
Solution Approach 1:
The bracket structure is designed as a dynamic system that actively adapts to battery cell expansion rather than restricting it. The brackets can move and adjust their configuration to accommodate the natural expansion of battery cells during charging, while maintaining uniform expansion distribution across all cells, thus ensuring safety through adaptability rather than restriction.
Data Source
AI summary
A battery module unit, including a plurality of sequentially stacked first brackets and a plurality of battery cells. Each first bracket includes a bracket body. At least one battery cell on one side of a first fixing bracket forms a first battery cell group. At least one battery cell on the other side of the first fixing bracket forms a second battery cell group. The battery module unit further includes a first connecting structure, disposed at one end of a plurality of the bracket bodies. A fastener is disposed on the first fixing bracket. The fastener is fixed to a sidewall of the first connecting structure so that the first connecting structure is fixed to the first fixing bracket in a first direction. The first direction is a stacking direction of the plurality of first brackets.