Battery Pack Gas Discharge Cooling via L-Shaped Passage
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Solution Overview
Problem
Gas generated from battery modules can become high in temperature and discharging it may pose a risk to surrounding areas, necessitating effective temperature suppression.
Innovation Solution
A battery pack design with an accommodation body featuring multiple communicating holes of varying sizes and lengths, along with interior spaces and cooling structures, facilitates controlled gas discharge and temperature regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If gas is discharged directly from the accommodation body, then the gas discharge structure is simple, but the discharged gas becomes high in temperature and poses a risk to surrounding areas
Solution Approach 1:
The patent introduces a multi-dimensional approach by creating an L-shaped gas passage that extends in multiple directions rather than a simple linear path. The gas passage includes a first portion extending in a first direction and a second portion extending in a second direction different from the first direction, forming an L-shape. This dimensional change increases the gas passage length and cooling effectiveness without significantly increasing overall structural complexity.
Solution Approach 2:
The patent implements preliminary cooling action by designing the gas passage to extend through or near battery modules before gas discharge. The gas passage is configured to allow gas to be cooled by contact with battery modules or cooling plates during its path from the accommodation space to the exterior. This preliminary cooling reduces the temperature of discharged gas before it reaches surrounding areas.
2Temperature
If the gas passage length is increased to cool the gas, then the discharged gas temperature is suppressed, but the accommodation body size increases
Solution Approach 1:
The L-shaped gas passage utilizes three-dimensional space efficiently by changing direction rather than extending linearly. This allows the gas passage to achieve sufficient length for cooling purposes while fitting within the compact boundaries of the accommodation body, avoiding excessive volume increase.
Solution Approach 2:
The gas passage is nested within or alongside existing battery module structures. The passage extends through or near battery modules, utilizing the existing spatial arrangement of components. This nesting approach allows the gas passage to achieve adequate length for cooling without requiring additional external space, as it integrates with the existing battery pack geometry.
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 design effectively suppresses the temperature of discharged gas, ensuring safer operation by efficiently managing gas discharge and cooling.
Implementation Method 1
an interior space through which gas generated from the accommodation space passes... a length of the interior space between the gas discharge portion and at least one communicating hole is greater than a length of the interior space between the gas discharge portion and at least another communicating hole
Data Source
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AI summary
A battery pack (10) includes an accommodation body (200) defining an accommodation space (250) in which a battery module (100) is accommodated, a central interior space (260) through which gas generated from the accommodation space (250) passes, and a plurality of large communicating holes (270L) and a plurality of small communicating holes (270S) through which the accommodation space (250) and the central interior space (260) communicate with each other, and a pressure relief valve (280) for discharging the gas from the central interior space (260) to the exterior space. The length of the central interior space (260) between the pressure relief valve (280) and each of the large communicating holes (270L) is greater than the length of the central interior space (260) between the pressure relief valve (280) and each of the small communicating holes (270S).