Battery Cell Housing Recess Conductive Layer for Tip Discharge Control
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Solution Overview
Problem
Existing battery cells face reliability issues due to non-uniform electric field distribution leading to tip discharge at connection points, especially in high-voltage environments, which can cause insulation failure and reduce the overall reliability of the battery.
Innovation Solution
Incorporating a conductive layer within a recess in the wall portion of the battery cell housing to enhance electric field distribution, ensuring uniformity and reducing the risk of tip discharge by extending from the surface into the recess and potentially covering it, while maintaining structural integrity and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a recess is provided in the wall portion to improve electric field distribution, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent applies local quality by providing a recess only in specific wall portions where electric field concentration occurs, rather than modifying the entire housing. The conductive layer is selectively placed in these localized recesses to address electric field distribution issues only where needed, maintaining uniformity in other areas and avoiding unnecessary complexity.
Solution Approach 2:
The conductive layer acts as an intermediary element placed within the recess to mediate the electric field distribution. It serves as a bridge between the wall portion and the internal components, redistributing the electric field to eliminate concentration at connection positions without requiring fundamental changes to the housing structure.
2Reliability
If the first conductive layer extends from the first surface into the recess to eliminate discharge tips, then the reliability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The recess is pre-formed in the wall portion during housing manufacturing, creating a predetermined guide structure. The conductive layer is then placed into this pre-prepared recess, which automatically positions it correctly and eliminates the need for high-precision positioning during assembly. The preliminary action of creating the recess simplifies subsequent manufacturing steps.
Solution Approach 2:
The conductive layer, when placed in the recess, automatically achieves the desired electric field distribution and eliminates discharge tips without requiring additional adjustment or precision control mechanisms. The recess structure itself provides the necessary guidance and positioning, allowing the system to self-correct electric field issues.
3Reliability
If the first conductive layer fills the recess completely to maximize electric field uniformity, then the reliability is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent applies partial action by having the conductive layer extend from the first surface into the recess but not necessarily filling it completely. This partial coverage is sufficient to eliminate discharge tips and improve electric field distribution at critical connection positions, avoiding the complexity of complete filling while achieving the necessary reliability improvement.
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 conductive layer improves the uniformity of electric field distribution, reducing the risk of tip discharge and enhancing the reliability of the battery cell, thereby improving its overall performance and safety.
Implementation Method 1
The provision of the first conductive layer improves the electric field distribution in a region, provided with the recess, of the first wall portion, resulting in a more uniform electric field strength distribution
Data Source
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AI summary
A battery cell, a battery, and an electric apparatus are provided. The battery cell includes a housing and a first conductive layer. The housing includes a first wall portion, where the first wall portion has a first surface, the first wall portion is provided with a recess, and the recess has a side surface connected to the first surface. The first conductive layer is accommodated in the recess, and the first conductive layer is in contact with the side surface. The provision of the first conductive layer improves the electric field distribution in a region, provided with the recess, of the first wall portion, resulting in a more uniform electric field strength distribution, reducing the risk of tip discharge at a connection position between the side surface and the first surface in a high-voltage environment, and improving the reliability of the battery cell.