Battery Pack Wall Assembly With Local Thermal Shielding
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Solution Overview
Problem
The challenge is to increase the driving range of electric vehicles by enhancing the energy density of battery packs while ensuring operational safety and maintaining a compact size within limited vehicle space.
Innovation Solution
A wall assembly for a vehicle battery pack is introduced, comprising a carrier plate and a protection sheet thermally coupled to the carrier plate. The protection sheet covers a portion of the carrier plate, providing local protection against mechanical and thermal strains, and acts as a ballistic shield against abrasive particles during thermal events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the geometric size of the battery pack is increased to achieve larger electric storage capacity, then the driving range is improved, but the vehicle space availability deteriorates
Solution Approach 1:
The patent applies local quality by providing protection sheets only at specific locations where thermal events are most likely to occur (near battery cells), rather than covering the entire carrier plate. This localized protection approach reduces the total amount of protection material needed, thereby reducing battery pack weight and volume while maintaining adequate protection where it is most needed for safety and heat diffusion
2Reliability
If the amount of protection material is increased to enhance safety against thermal events, then the operational safety is improved, but the battery pack weight and size increase
Solution Approach 1:
The patent implements local quality by strategically placing protection sheets only at critical areas where thermal events are most likely to occur, such as near battery cells. This localized approach provides adequate safety protection where needed while minimizing the total amount of protection material used, thereby reducing battery pack weight without compromising operational safety
Solution Approach 2:
The patent applies partial action by providing protection coverage for only a portion of the carrier plate surface rather than complete coverage. The protection sheets are positioned to cover critical areas where thermal events are most likely to occur, providing sufficient protection for safety while avoiding the excessive material usage that would result from full-surface coverage, thus reducing overall weight
3Reliability
If the protection sheet covers the entire carrier plate to maximize protection, then the safety against thermal events is improved, but the amount of material needed increases
Solution Approach 1:
The patent applies local quality by providing protection sheets only at specific locations where thermal events are most likely to occur (near battery cells), rather than covering the entire carrier plate. This localized protection approach reduces the total amount of protection material needed, thereby reducing battery pack weight and volume while maintaining adequate protection where it is most needed for safety and heat diffusion
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 wall assembly effectively reduces the size and weight of the battery pack, enhances operational safety by diffusing heat and shielding against abrasive particles, and allows for higher energy density and longer service life of the battery pack.
Implementation Method 1
the thermal coupling between the protection sheet and the carrier plate, heat energy may be diffused using the carrier plate. Thus, the protection sheet as such does not need to be configured to diffuse heat occurring during operation or malfunction of the battery pack
Data Source
AI summary
The disclosure relates to wall assembly for a battery pack of a vehicle, battery pack for a vehicle, and a vehicle. A corresponding wall assembly for a battery pack of a vehicle can comprise a carrier plate, and a protection sheet connected to the carrier plate. The protection sheet and the carrier plate can be thermally coupled via a surface area of the carrier plate. The protection sheet can cover a portion of the carrier plate.