Li-Ion Battery Top Cover Deformable Plate Fixation
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Solution Overview
Problem
Existing Li-ion battery top cover designs face issues with the conductive plate breaking during assembly and use due to inadequate fixation, leading to potential malfunctions and reduced interior space utilization.
Innovation Solution
A top cover plate design incorporating a deformable plate, conductive plate, and insulation piece with specific connecting portions and holes, allowing for secure fixation without occupying excessive space, ensuring the conductive plate remains stable and functional.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conductive plate is integrated with the CID as a whole and fixed with the deformable plate through welding, then the circuit can be conducted to the positive pole terminal, but the conductive plate is easy to be broken and loses efficacy during normal assembling and using
Solution Approach 1:
The conductive plate is divided into two separate components: the CID (circuit interrupting device) and the conductive plate itself. This segmentation allows the CID to be fixed to the deformable plate while the conductive plate is separately fixed to the top cover plate, distributing the mechanical stress and preventing the conductive plate from breaking during assembly and use.
Solution Approach 2:
The deformable plate serves as an intermediary component between the CID and the top cover plate. The CID is fixed to the deformable plate, which in turn is fixed to the top cover plate, creating a stable connection structure that prevents the conductive plate from breaking while maintaining electrical conductivity.
2Reliability
If auxiliary components are added to fix the conductive plate, then the conductive plate can be firmly fixed, but the interior space of the battery is occupied
Solution Approach 1:
The deformable plate is merged with the top cover plate through a punching connection, where the deformable plate is punched to form a connection structure that directly integrates with the top cover plate. This merging eliminates the need for separate auxiliary fixing components while firmly securing the conductive plate through the CID connection.
Solution Approach 2:
The deformable plate serves multiple functions: it acts as a structural support for the CID, provides a connection interface with the top cover plate through punching, and ensures the stable fixation of the conductive plate. This multi-functionality eliminates the need for additional auxiliary components, preserving battery interior space.
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 design provides a stable connection between the top cover plate and insulation piece, preventing conductive plate breakage and ensuring the battery's integrity during assembly and use, while minimizing internal space usage.
Implementation Method 1
the through-hole is a ladder hole with a top diameter smaller than a bottom diameter and wherein the first connecting portion is a rivet, the rivet passes through the through-hole and is fixed with the through-hole through riveting
Data Source
Figure 1~3
Figure 4~5
AI summary
The present application relates to the field of Li-ion battery production technologies and, particularly, relates to a top cover of a power battery and the power battery. The top cover plate of a power battery includes a top cover plate, a first electrode unit and a second electrode unit, the top cover plate is provided with a deformable plate connecting hole and a first connecting portion integrated with the top cover plate as a whole, the first electrode unit includes the deformable plate, a conductive plate and an insulation piece, the insulation piece is provided with a second connecting portion and a conductive plate connecting portion, the deformable plate seals the deformable plate connecting hole, the conductive plate is located underneath the deformable plate, and is electrically connected with the deformable plate, the insulation piece is fixed underneath the top cover plate through cooperation of the first connecting portion and the second connecting portion, the conductive plate is insulated from and fixed with the top cover plate through the conductive plate connecting portion. The power battery includes the top cover of the power battery. The power battery provided by the present application can effectively prevent breaking, losing efficacy or deformation of the conductive plate during the using process.