Integrated Battery Pack Support Structure for Load and Vent Isolation
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Solution Overview
Problem
In CTV electric vehicles, the weight of seats and passengers deforms or damages the battery pack, and thermal runaway releases high-temperature substances that threaten the passenger compartment.
Innovation Solution
An integrated battery pack design with support members between the battery module and housing, which evenly distributes weight and isolates high-temperature substances during thermal runaway, using a pressure relief channel and foam adhesive for structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the vehicle chassis is integrated with the housing of the battery pack in a CTV electric vehicle, then the structure of the entire vehicle is significantly simplified, but the weight of seats and passengers directly acts on the battery pack causing deformation or damage
Solution Approach 1:
The patent introduces support members as intermediary components between the battery module and the housing. These support members act as a mediator to distribute the weight of seats and passengers, preventing direct concentration of force on the battery pack while maintaining the integrated CTV structure. The support members are positioned at specific locations ( corners and center of the battery module top surface) to effectively分散 the load.
2Ease of manufacture
If the vehicle chassis is integrated with the housing of the battery pack, then manufacturing costs are lowered, but high-temperature substances from pressure relief valve spread to the bottom of the passenger compartment causing thermal influence
Solution Approach 1:
The support members serve as a physical barrier and intermediary structure between the battery module's pressure relief valve and the passenger compartment. When the pressure relief valve opens during thermal runaway, the support members block the direct path of high-temperature substances, redirecting them into the pressure relief channel and preventing them from reaching the passenger compartment floor.
Solution Approach 2:
The patent extracts the harmful thermal influence path by creating a separate pressure relief channel that is isolated from the passenger compartment. The support members enclose this channel, effectively separating the thermal runaway pathway from the passenger space, thus removing the direct thermal threat to passengers.
3Strength
If support members are disposed between the battery module and housing, then structural strength and rigidity are improved, but device complexity increases
Solution Approach 1:
The support members are divided into multiple discrete components positioned at specific locations (four corners and center of the battery module top surface). This segmentation allows each support member to independently bear and distribute local loads, collectively providing comprehensive structural support without requiring a single complex support structure.
Data Source
Figure 1
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AI summary
Provided are an integrated battery pack and an electric vehicle. The integrated battery pack includes a housing (1), a battery module (2), and multiple support members (3), where an accommodating cavity is provided in the housing (1), the battery module (2) is mounted in the accommodating cavity, a pressure relief valve (26) is disposed on the top of the battery module (2), the multiple support members (3) are spaced apart on the top of the battery module (2) and are sandwiched between the battery module (2) and the housing (1), at least part of the multiple support members (3) cover the pressure relief valve (26), and the at least part of the multiple support members (3) on the pressure relief valve (26) and the battery module (2) enclose a pressure relief channel (323).