Battery Cell Row Layout to Isolate Venting From Electrical Connections
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Solution Overview
Problem
The discharge from a battery's pressure relief mechanism can cause conductive particles to flow to the electrical connection region, leading to insulation failure and high-voltage ignition, compromising safety and reliability.
Innovation Solution
The electrical connection and pressure relief portions of each cell are positioned at different sides of the cell, ensuring a significant distance and avoiding direct alignment, thereby preventing conductive particles from reaching the connection points during thermal runaway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pressure relief portion and electrical connection portion are positioned close together or facing each other, then the battery structure is compact and easy to manufacture, but conductive particles from pressure relief discharge can flow to the electrical connection region causing insulation failure and high-voltage ignition
Solution Approach 1:
The patent positions the pressure relief portion and electrical connection portion at different spatial locations on the cell body, specifically ensuring they are not facing each other. This spatial separation in multiple dimensions prevents conductive particles discharged from the pressure relief portion from reaching the electrical connection portion, thereby avoiding insulation failure and high-voltage ignition while maintaining manufacturing feasibility
Solution Approach 2:
The patent applies different functional qualities to different parts of the cell: the electrical connection portion is designed for electrical connectivity while the pressure relief portion is designed for safety discharge. By positioning these parts at different locations with appropriate spatial separation, each part performs its specific function without interfering with the other, ensuring both electrical reliability and safety
2Productivity
If the electrical connection portion is positioned to face the other cell row for convenient electrical connection, then productivity increases and electrical connection is centralized, but it becomes vulnerable to discharge from other cells' pressure relief portions
Solution Approach 1:
The patent positions the electrical connection portion on the side of the cell facing the other cell row for convenient electrical connection, but simultaneously ensures that the pressure relief portion is positioned such that its discharge direction does not face the electrical connection portion of the same or adjacent cells. This multi-dimensional spatial arrangement allows electrical connections to be centralized and efficient while protecting against harmful discharge influence
Data Source
AI summary
A battery and an electrical device are provided. The battery includes at least one cell group. The cell group includes two cell rows. Each cell row includes at least one cell. Each cell is provided with an electrical connection portion at a side of the cell facing the other cell row in the same group. Each cell is further provided with a pressure relief portion. The pressure relief portion and the electrical connection portion are disposed at different sides of the cell.