Battery Cell Vent Alignment for Safer Pressure Relief
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Solution Overview
Problem
Existing battery technologies face safety hazards due to uncontrolled pressure and temperature releases during charging and discharging, which can lead to explosions and fires, and current pressure relief mechanisms often discharge emissions in a direction that can cause short circuits and further safety issues.
Innovation Solution
A battery design incorporating a pressure relief mechanism actuated by internal pressure or temperature thresholds, coupled with a thermal management component having a pressure relief zone and restraint members for accurate alignment, directs emissions away from electrical chambers to prevent short circuits and enhances safety by buffering high-temperature and high-pressure emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure relief mechanism is added to the battery cell, then safety is improved by relieving internal pressure, but the risk of short circuits and explosions increases if emissions are not properly directed
Solution Approach 1:
The patent introduces a thermal management component as an intermediary between the battery cell and the external environment. This component includes a pressure relief zone that receives emissions from the pressure relief mechanism and directs them away from electrical chambers, preventing short circuits while maintaining the pressure relief function
Solution Approach 2:
The patent segments the battery structure into distinct functional zones: the battery cell containing the pressure relief mechanism, the thermal management component with its pressure relief zone, and separate electrical chambers. This segmentation ensures that emissions are contained and directed through specific pathways away from sensitive electrical components
2Speed
If the pressure relief mechanism discharges emissions directly, then pressure relief is achieved quickly, but harmful emissions may cause short circuits and safety issues
Solution Approach 1:
The thermal management component serves as a mediator that the emissions must pass through. The pressure relief zone is positioned to receive emissions directly from the pressure relief mechanism, and the component's structure directs these emissions away from electrical chambers, maintaining both rapid pressure relief and safety
Solution Approach 2:
The patent changes the spatial dimension of emission discharge by introducing a vertical or lateral pathway through the thermal management component. Instead of direct horizontal discharge that might hit electrical chambers, emissions are routed through a different spatial dimension via the pressure relief zone, away from harmful areas
3Temperature
If the thermal management component is attached directly to the battery cell, then temperature control is improved, but alignment precision between pressure relief mechanism and pressure relief zone becomes difficult to achieve
Solution Approach 1:
The patent incorporates restraint members (protrusions and grooves) during the preliminary design stage of the thermal management component. These restraint members are pre-positioned to guide the alignment between the battery cell and thermal management component, ensuring that the pressure relief mechanism and pressure relief zone align correctly during assembly without requiring high-precision manufacturing
4Ease of manufacture
If restraint members with protrusion and groove structures are used, then alignment and fixation of pressure relief mechanism and pressure relief zone is facilitated, but device complexity increases
Solution Approach 1:
The patent merges the alignment function and the fixation function into a single integrated restraint member structure. The protrusion and groove features serve both to align the components during assembly and to fix them in place, eliminating the need for separate alignment and fixation mechanisms, thus reducing overall structural complexity
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 solution effectively directs emissions from the battery cell to a collection chamber, reducing the risk of short circuits and explosions, and enhances safety by isolating the electrical chamber from the collection chamber, thereby minimizing the destructive impact of high-temperature and high-pressure emissions.
Implementation Method 1
the pressure relief mechanism being configured to be actuated when an internal pressure or temperature of the battery cell reaches a threshold, to relieve the internal pressure
Implementation Method 2
a thermal management component configured to accommodate a fluid to adjust a temperature of the battery cell
Data Source
AI summary
Embodiments of the present application provide a battery, a power consumption apparatus, a method and apparatus for producing a battery. The battery includes: a battery cell including a pressure relief mechanism disposed on a first wall; and a thermal management component, a first surface of the thermal management component being attached to the first wall, and the thermal management component being provided with a pressure relief zone; where the first wall is provided with a first restraint member, the thermal management component is provided with a second restraint member, and the first restraint member and the second restraint member are arranged to be mated, so that the pressure relief mechanism is arranged opposite to the pressure relief zone. A battery, a power consumption apparatus, a method and apparatus for producing a battery of the present application could enhance safety of the battery.