Dual-Function Battery Pole Assembly for Electrolyte Injection Sealing
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Solution Overview
Problem
The pole assembly in existing battery cells has a single function of electric conduction and requires a separate sealing nail for blocking the injection hole after liquid injection, which complicates the manufacturing process and reduces the volumetric energy density.
Innovation Solution
The pole assembly is divided into two parts, a first pole with an injection hole and a second pole that blocks the injection hole, allowing for dual functions of electric conduction and liquid injection, with the second pole being connected to the first pole to enhance contact and reduce contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate sealing nail is used to block the injection hole, then the injection hole can be effectively sealed, but the device complexity increases and volumetric energy density decreases
Solution Approach 1:
The patent combines the sealing nail and the second pole into a single integrated component. The second pole serves dual functions: providing electrical connection and sealing the injection hole. This merging eliminates the need for a separate sealing nail, reducing component count while maintaining effective sealing.
Solution Approach 2:
The second pole is designed to perform multiple functions simultaneously: it provides electrical conduction as a pole component and acts as a sealing element by blocking the injection hole. This multi-functionality reduces the overall number of components needed in the battery cell assembly.
2Reliability
If a separate sealing nail is used to block the injection hole, then the injection hole can be effectively sealed, but the volumetric energy density decreases
Solution Approach 1:
By integrating the sealing function into the second pole, the patent eliminates the volume occupied by a separate sealing nail. The second pole's material volume serves both electrical and sealing purposes, maximizing space utilization and improving volumetric energy density.
Solution Approach 2:
The second pole's multi-functional design allows it to replace both the electrical connection component and the sealing component, reducing the total material volume required while maintaining both electrical conductivity and sealing effectiveness.
3Reliability
If the first pole and second pole are pressed against each other, then the current flow capacity is enhanced, but the manufacturing complexity increases
Solution Approach 1:
The pole assembly is divided into two separate components (first pole and second pole) that can be manufactured independently using standard processes, then assembled through a simple pressing operation. This segmentation allows for easier manufacturing of individual parts while maintaining good electrical contact through the pressing connection.
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 dual-function pole assembly improves current flow capacity, reduces manufacturing complexity, and enhances volumetric energy density by eliminating the need for a separate sealing nail.
Implementation Method 1
the first pole and the second pole are pressed against each other, so that the first pole and the second pole are in close contact with each other, which is beneficial for enhancing the current flow capacity between the first pole and the second pole
Data Source
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AI summary
A pole assembly, a cover assembly and a battery cell, belonging to the technical field of batteries. The pole assembly (101) includes a first pole (1) and a second pole (2). The first pole (1) is formed with an injection hole (11). The second pole (2) is connected to the first pole (1) to block the injection hole (11). The pole assembly (101) is no longer an integral piece, but is divided into a first pole (1) and a second pole (2). The first pole (1) is provided with an injection hole (11), through which electrolyte can be injected into the battery core located in the accommodation cavity enclosed and formed by a case and the cover assembly (100). After the liquid injection is completed, the second pole (2) is connected to the first pole (1), and the injection hole (11) is blocked by the second pole (2). There is no need to provide an additional sealing nail for blocking the injection hole (11), and the step of welding the sealing nail to block the injection hole (11) is omitted. The pole assembly (101) not only has the function of electric conduction, but also has the function of liquid injection through the injection hole (11) of the first pole (1), and has the function of a sealing nail by blocking the injection hole (11) with the second pole (2).