Battery Damping Member Shock Absorption
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Solution Overview
Problem
Secondary batteries face challenges in preventing deformation of the electrode assembly and current collector, which can lead to safety issues and reduced performance due to internal movement and external shocks.
Innovation Solution
Incorporating an elastic damping member between the electrode assembly and the can, which contacts the current collector and the can's inner surface, to absorb shocks and prevent movement, while also providing a passageway for exhaust gases through a hole in the damping member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the electrode assembly is tightly fixed in the can, then movement is prevented, but external shocks are transmitted to the electrode assembly causing deformation
Solution Approach 1:
A damping member made of elastic material is positioned between the electrode assembly and the can to absorb external shocks before they reach the electrode assembly. This cushioning element prevents deformation of the electrode plates and current collector by dissipating impact energy through elastic deformation.
Solution Approach 2:
The damping member acts as an intermediary element between the rigid can and the sensitive electrode assembly. It mediates the interaction by providing both mechanical support to prevent movement and shock absorption to protect against external impacts, resolving the contradiction between stability and shock protection.
2Stability of the object's composition
If a rigid support structure is used to prevent electrode assembly movement, then position stability is improved, but deformation of electrode plates and current collector occurs due to shock transmission
Solution Approach 1:
The elastic damping member provides beforehand cushioning by being pre-positioned between the electrode assembly and the can. When external shocks occur, the damping member deforms elastically to absorb impact energy, preventing the transmission of these shocks to the electrode plates and current collector, thereby avoiding deformation while maintaining position stability.
Solution Approach 2:
The damping member changes its physical state through elastic deformation under external shock, temporarily altering its shape and density parameters to absorb impact energy. This parameter change allows it to protect the electrode assembly from deformation while maintaining overall structural stability.
3Strength
If the damping member is made of rigid material, then structural support is improved, but shock absorption capability is reduced
Solution Approach 1:
The damping member is made of elastic material that changes its mechanical parameters under load. Under normal conditions, it maintains sufficient structural strength to support the electrode assembly. Under external shock, it undergoes elastic deformation to absorb impact energy, demonstrating a dynamic change in stiffness and strength parameters to simultaneously provide support and shock absorption.
Solution Approach 2:
The damping member utilizes elastic materials that combine the properties of structural support and shock absorption in a single component. This composite functionality is achieved through the selection of materials with appropriate elastic moduli and damping characteristics, allowing the same material to provide both mechanical support and impact protection.
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 damping member effectively stabilizes the electrode assembly and current collector, preventing deformation and ensuring safety by absorbing shocks and allowing gas exhaust, thereby enhancing the battery's reliability and safety.
Implementation Method 1
the damping member is made of an elastic material, for example a plastic material
Data Source
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AI summary
A battery (100), comprising a can (110) and an electrode assembly (120) arranged inside the can (110), the battery further comprising at least one damping member (140) and a current collector (130); wherein at least one electrode plate of the electrode assembly (120) comprises a non-coating portion (122) and the current collector (130) is fixed to the non-coating portion (122), wherein the damping member (140) is positioned between two electrodes of the electrode assembly (120) and wherein the damping member (140) contacts the current collector (130).