Battery Pack Binding Structure for Secure Limit Member Engagement
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Solution Overview
Problem
Conventional battery packs face issues with loose or detached parts, affecting their operation reliability due to the potential disengagement of binding strips from limit members, leading to separation and impacting normal operation.
Innovation Solution
A battery pack design that includes a battery module, a limit member with a recess, and a binding strip that surrounds the module, where the binding strip is engaged in the recess, ensuring it remains in place even if the limit member moves, maintaining constant width and preventing disengagement, thus enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional battery pack structure is used, then the structure is simple, but the binding strip may detach from the limit member affecting operation reliability
Solution Approach 1:
The binding strip is nested within the recess of the limit member, creating a nested structure where the strip body is received inside the recess space. This nesting prevents the binding strip from detaching while maintaining a compact overall structure, resolving the contradiction between reliability and structural simplicity.
Solution Approach 2:
The recess acts as an intermediary structure between the binding strip and the limit member main body. It provides a transitional space that secures the binding strip in place, preventing direct detachment while maintaining structural integrity. This intermediary recess resolves the reliability issue without requiring complex additional components.
2Adaptability or versatility
If the battery module length changes, then adaptability is improved, but the binding strip may disengage from the limit member
Solution Approach 1:
The binding strip is nested within the recess that extends along the length direction of the battery module. This nested configuration allows the binding strip to remain engaged with the limit member even when the battery module length changes during assembly or operation, maintaining reliable binding without compromising adaptability.
Solution Approach 2:
The recess extends in the length direction (third dimension) rather than only in the width direction. This dimensional extension allows the binding strip to remain engaged along the length of the module, providing adaptability to length changes while maintaining binding reliability through the extended engagement path.
3Adaptability or versatility
If the binding strip is made loose to accommodate length variations, then adaptability is improved, but the binding force decreases affecting reliability
Solution Approach 1:
The binding strip is nested within the recess structure that provides both length accommodation and force maintenance. The recess walls constrain the binding strip to maintain proper tension and binding force while allowing positional adjustment for length variations, resolving the contradiction between adaptability and binding force.
Solution Approach 2:
The recess geometry parameters (length, width, depth) are designed to accommodate length variations while maintaining optimal binding force. By carefully controlling these geometric parameters, the structure adapts to length changes without compromising the binding force exerted by the strip on the battery module.
Data Source
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AI summary
The present disclosure relates to a battery pack and an electric system. The battery pack includes: a battery module including a plurality of battery cells arranged in a thickness direction of each of the plurality of battery cells; a limit member abutting against an end of the battery module located in the thickness direction of the battery cell, the limit member having a first recess extending in the thickness direction of the battery cell; and a first binding strip surrounding the battery module and sleeved around the limit member in a height direction of each of the plurality of battery cells. The first binding strip is engaged in the first recess. Since the first recess extends in the thickness direction of the battery cell, in a case where the thickness direction of the battery cell is a length direction of the battery module, the first binding strip, when being engaged in the first recess, cannot disengaged from the first recess to be separated from the limit member even if the limit member moves away from the first binding strip due to a decrease of a length of the battery module. Therefore, the first binding strip is always engaged in the first recess to ensure that the first binding strip can continue to providing the binding, thereby improving operation reliability of the battery pack.