Battery Cell Insulating Gap Structure to Prevent Internal Short Circuits
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Solution Overview
Problem
Lithium-ion batteries face safety issues due to internal short circuits, which can lead to excessive heat, fires, or electrical appliance damage, necessitating a reduction in short circuit risks.
Innovation Solution
A battery cell design featuring a housing with a first wall supporting the electrode assembly and a first insulating member that abuts against the electrode assembly to create a gap between the insulating member and the second wall, reducing the risk of electrode plate wrinkling and short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the electrode assembly is placed in the housing without a bottom support plate, then the assembly process is simplified and cost is reduced, but the electrode plate may be pressed and wrinkled by the corner region of the housing
Solution Approach 1:
The patent introduces a first insulating member as an intermediary component between the electrode assembly and the second wall of the housing. This insulating member abuts against the end of the electrode assembly facing the second wall, creating a protective barrier that prevents direct contact between the electrode assembly and the potentially harmful corner region of the housing, thereby eliminating the need for a bottom support plate while maintaining safety
Solution Approach 2:
The patent segments the protective function by separating the insulating member from the housing structure itself. Instead of relying on the housing to provide both structural support and protection, the design divides these functions: the housing provides structural containment while the separate insulating member provides protective isolation, simplifying the overall assembly process
2Strength
If the electrode assembly contacts the second wall of the housing, then structural support is provided, but the risk of short circuit and electrochemical corrosion increases
Solution Approach 1:
The first insulating member serves as a mediator that allows the electrode assembly to maintain its position near the second wall for structural support while preventing direct contact. The insulating member transfers the mechanical support function away from the housing wall, eliminating the harmful electrical contact while preserving the structural integrity of the assembly
Solution Approach 2:
The patent extracts the protective function from the housing structure itself and places it in a separate insulating member. This separation allows the housing to focus on providing structural support while the extracted insulating member专门 handles the protection against short circuits and corrosion
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 reduces the risk of short circuits and improves safety performance by minimizing contact between the electrode assembly and the housing, while also simplifying assembly, reducing costs, and weight.
Implementation Method 1
the first insulating member abuts against an end of the electrode assembly facing the second wall to insulate and isolate the second wall from the electrode assembly
Implementation Method 2
a gap is formed between a surface of the first insulating member facing away from the electrode assembly and an inner surface of the second wall... reducing the risk of an electrode plate of the electrode assembly being pressed and wrinkled
Data Source
AI summary
A includes a housing, an electrode assembly, and a first insulating member. The housing includes a first wall and a second wall disposed opposite each other in a first direction, where the first wall is provided with an electrode terminal. The electrode assembly is accommodated in the housing, where the electrode assembly is electrically connected to the electrode terminal, and the first wall supports the electrode assembly. The first insulating member abuts against an end of the electrode assembly facing the second wall. In the first direction, a gap is formed between a surface of the first insulating member facing away from the electrode assembly and an inner surface of the second wall.