Battery Cell Pressure Relief Mechanism Protection
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Solution Overview
Problem
Battery leakage poses a significant threat to safety performance and service life, often resulting from internal pressure or temperature fluctuations and impacts that damage the pressure relief mechanism, leading to premature failure.
Innovation Solution
A battery cell design featuring a pressure relief mechanism protected by a first insulating member with a staggered second opening, which directs emissions away from the pressure relief mechanism, ensuring it remains functional and intact even under impact or drops, thereby reducing leakage and enhancing safety and longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pressure relief mechanism is exposed to the interior of the battery cell, then it can effectively relieve internal pressure, but it is vulnerable to damage from impacts and electrolytic solution sloshing
Solution Approach 1:
The patent introduces a flow path as an intermediary channel between the battery interior and the pressure relief mechanism. This flow path directs pressure relief emissions away from the pressure relief mechanism's opening, preventing direct contact with sloshing electrolytic solution while maintaining effective pressure relief functionality.
Solution Approach 2:
The patent positions the pressure relief mechanism's opening at a location that is staggered relative to the flow path in the thickness direction of the end cover. This spatial arrangement in another dimension allows the mechanism to remain accessible for pressure relief while being protected from harmful factors in the electrolytic solution environment.
2Reliability
If the pressure relief mechanism opening is positioned to face the battery interior, then pressure relief is effective, but electrolytic solution can directly impact and damage the mechanism
Solution Approach 1:
The flow path serves as a mediator that separates the pressure relief function from the harmful electrolytic solution environment. It allows pressure emissions to pass through while blocking direct access of electrolytic solution to the pressure relief mechanism opening.
Solution Approach 2:
The patent segments the pressure relief function from the electrolytic solution exposure by creating a dedicated flow path channel. This segmentation allows the pressure relief mechanism to perform its function while being physically isolated from the harmful environment through the flow path structure.
Data Source
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AI summary
Embodiments of the present application discloses a battery cell, a battery, a power consumption apparatus and a method and an apparatus for producing a battery cell. The power consumption apparatus is equipped with the battery, and the battery has one or a plurality of battery cells, where the battery cell includes: a housing, with a first opening; an electrode assembly, arranged in the housing; an end cover assembly, including an end cover, a pressure relief mechanism and a first insulating member, the end cover covers the first opening, the pressure relief mechanism is arranged on the end cover, the pressure relief mechanism is configured to be actuated to relieve the internal pressure of the battery cell when an internal pressure or temperature of the battery cell reaches a threshold, the first insulating member is located on a side of the end cover close to the electrode assembly to isolate the electrode assembly and the end cover, and the first insulating member is configured that a projection on the end cover along a thickness direction of the end cover covers the pressure relief mechanism to protect the pressure relief mechanism. The battery cell is not easy to leak, and possesses good safety performance and long service life. The battery and the power consumption apparatus provided with the battery cell possess high security and durability.