Battery Housing Base Breaking Point for Gas Discharge
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Solution Overview
Problem
Existing battery tray designs for electric vehicles face challenges in safely and efficiently discharging gases during thermal runaway, as traditional relief valves obstruct heat dissipation and increase costs, and cannot be integrated into the housing base without compromising thermal connection and structural integrity.
Innovation Solution
Incorporating a predetermined breaking point in the housing base arrangement, which acts as a material weakening to create an opening for gas discharge when pressure exceeds, allowing gases to escape safely downwards, thus avoiding the need for separate vents and maintaining thermal connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate relief valves are installed in the battery tray, then gas discharge capability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the gas discharge function with the housing base arrangement by integrating a predetermined breaking point directly into the base structure. This eliminates the need for separate relief valves, thereby reducing device complexity while maintaining gas discharge capability. The breaking point is formed as an integral part of the housing base arrangement, combining structural support and safety functions in one component.
Solution Approach 2:
The housing base arrangement is designed to serve multiple functions: it provides structural support for the battery cells, acts as a thermal management interface, and incorporates a predetermined breaking point for gas discharge. This multi-functionality eliminates the need for separate dedicated relief valve components, reducing overall device complexity while maintaining all necessary functions.
2Reliability
If separate relief valves are installed in the battery tray, then gas discharge capability is improved, but manufacturing cost increases
Solution Approach 1:
By combining the gas discharge function into the housing base arrangement through a predetermined breaking point, the patent eliminates the need for separate relief valve components. This reduction in part count directly lowers manufacturing costs, assembly complexity, and inventory requirements while maintaining the essential gas discharge capability.
Solution Approach 2:
The predetermined breaking point is designed as a simple structural feature of the housing base arrangement rather than an expensive mechanical valve. This approach uses a cost-effective solution that sacrifices a small portion of the base material to achieve reliable gas discharge, eliminating the need for costly sealed valve mechanisms.
3Reliability
If vents are integrated into the housing base, then gas discharge capability is improved, but thermal connection and structural integrity deteriorate
Solution Approach 1:
The predetermined breaking point is created as a localized material weakening at a specific position in the housing base arrangement, while the rest of the base maintains its full structural integrity and thermal management capabilities. This localized approach allows gas discharge functionality to be added without compromising the overall strength and thermal connection of the housing base.
Solution Approach 2:
The breaking point is pre-formed during housing base manufacturing as a controlled material weakening. This preliminary action ensures that the structural integrity is maintained during normal operation, while the predetermined failure point is already prepared to release gas under overpressure conditions without requiring additional modifications to the base structure.
4Reliability
If vents are integrated into the housing base, then gas discharge capability is improved, but heat dissipation efficiency deteriorates
Solution Approach 1:
The breaking point is localized to a specific area of the housing base arrangement, allowing the majority of the base surface to maintain optimal thermal contact with the battery cells. This localized approach ensures that heat dissipation efficiency is preserved across the bulk of the thermal management interface, while gas discharge functionality is provided at the specific breaking point location.
Solution Approach 2:
The housing base arrangement is conceptually segmented into functional zones: the predetermined breaking point area for gas discharge and the surrounding areas for thermal management. This segmentation allows each zone to optimize its specific function without interfering with the other, maintaining heat dissipation efficiency while providing gas discharge capability.
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
This solution enables safe and efficient gas discharge from battery cells, reducing the risk of explosion, minimizing additional costs, and maintaining effective heat dissipation while directing gases away from the passenger compartment, enhancing vehicle safety.
Implementation Method 1
which is designed, in dependence on a gas escape of a gas from the degassing opening of the at least one battery cell, to release an opening penetrating the housing base arrangement
Data Source
AI summary
A battery arrangement having a housing base arrangement and at least one battery unit which is arranged on the housing base arrangement and is arranged above the housing base arrangement with respect to a first direction and which comprises at least one battery cell. The at least one battery cell has a first side having a releasable degassing opening which is releasable for discharging a gas from the at least one battery cell. The housing base arrangement has at least one predetermined breaking point, which is designed, in dependence on a gas escape of a gas from the degassing opening of the at least one battery cell, to release an opening penetrating the housing base arrangement with respect to the first direction, in order to discharge the gas escaping from the degassing opening of the at least one battery cell through the released opening.