Battery Cell Constraining Assembly for Full Gas Discharge
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Solution Overview
Problem
Existing constraining trays for battery cells fail to provide an effective constraining effect, leading to incomplete gas discharge and increased defect rates in battery cells during formation and grading processes.
Innovation Solution
A constraining apparatus comprising a base, a positioning assembly, and a cushion assembly, which allows for a first state where the positioning members abut to constrain the battery cell and a second state where they are spaced apart for easy loading and unloading, utilizing an elastic cushion assembly to ensure full gas discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing constraining trays are used to constrain battery cells, then the battery cells can be held in position, but the constraining effect is insufficient and gas cannot be fully discharged
Solution Approach 1:
The positioning members are designed to be movable rather than fixed, allowing them to transition between a spaced-apart state for loading and an abutting state for constraining. This dynamic adjustment enables the system to adapt to different operational phases, achieving both easy loading and effective gas discharge through movement control.
Solution Approach 2:
The system changes the spatial parameter (distance) between positioning members dynamically. By adjusting the position of positioning members from a spaced configuration during loading to an abutting configuration during constraining, the system optimizes both loading efficiency and constraining effectiveness for complete gas discharge.
2Reliability
If positioning members are kept close together to constrain battery cells, then gas discharge is improved, but loading and unloading becomes difficult
Solution Approach 1:
The positioning members are designed with movable capabilities along guide assemblies, enabling them to switch between a spaced-apart configuration that facilitates easy battery cell loading and unloading, and an abutting configuration that provides effective constraining for gas discharge. This dynamic reconfigurability resolves the contradiction between operational ease and constraining effectiveness.
Solution Approach 2:
Before the constraining phase begins, the positioning members are preliminarily positioned in a spaced-apart state to allow easy battery cell insertion. Once the battery cell is in place, the positioning members are then moved to the abutting state to establish effective constraining, ensuring both easy loading and effective gas discharge are achieved through sequential positioning actions.
3Device complexity
If fixed constraining structures are used, then the structure is simple, but the constraining effect is insufficient for complete gas discharge
Solution Approach 1:
The system replaces fixed constraining structures with movable positioning members that can dynamically adjust their positions. The positioning members slide along guide assemblies to transition between spaced and abutting configurations, providing enhanced constraining effectiveness for complete gas discharge while maintaining relatively simple structural design through the use of guide assemblies and movable components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The constraining apparatus effectively reduces the defect rate of battery cells by ensuring full gas discharge during the formation and grading processes, while also improving the efficiency of the constraining process.
Implementation Method 1
the cushion assembly has an elastic force, which can be converted into a constraining force on the battery cell
Data Source
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AI summary
This application relates to a constraining apparatus and a constraining device. The constraining apparatus includes a base (1), a positioning assembly (2), and a cushion assembly (3). The positioning assembly (2) includes a plurality of positioning members (20) arranged in sequence in a first direction (X) and located between two end plate assemblies (13), where the plurality of positioning members (20) are movably connected to a guide assembly (12) in the first direction (X), and adjacent two of the positioning members (20) are fitted to each other in the first direction (X). The cushion assembly (3) is disposed on at least one of two sides of the positioning member (20) that are opposite each other in the first direction (X). The constraining apparatus includes a first state and a second state, where in the first state, adjacent two of the positioning members (20) abut against each other, such that an accommodating space (4) for accommodating a battery cell (10) is formed between the adjacent two of the positioning members (20), and the cushion assembly (3) is configured to abut against the battery cell (10) and the positioning members (20); and in the second state, the plurality of positioning members (20) are spaced apart from each other in the first direction (X). The constraining apparatus in this application improves effect of constraining battery cells (10), thereby decreasing the defect rate of battery cells (10).