Battery Pack Fireproof Component Structure to Prevent Bolt Cracking
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Solution Overview
Problem
Existing battery packs face safety issues due to the risk of thermal runaway and subsequent fires or explosions, exacerbated by the crushing and cracking of fireproof components when fastened with bolts, which compromises their reliability and efficiency.
Innovation Solution
A fireproof component comprising a main body and frame, where the frame is screw-connected to the battery module without fixing the main body, utilizing a mica board for high-temperature resistance and a modular design with replaceable connecting pieces for enhanced safety and production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fireproof component is fastened into the battery pack by bolts, then the fireproof component is fixed securely, but the joint between the fireproof component and the battery pack is prone to crushing and cracking under the locking effect of the bolts
Solution Approach 1:
The fireproof component is divided into two independent parts: a frame and a main body. The frame is responsible for bearing the locking force from bolts and fastening to the battery pack, while the main body provides fireproof protection. This segmentation allows each part to perform its specific function without compromising the other, avoiding the crushing and cracking that would occur if the main body directly bore the locking force.
2Reliability
If the main body is fixed to the battery module, then the fireproof component is securely attached, but the main body is prone to crushing and cracking under the locking effect
Solution Approach 1:
The fireproof component is segmented into a frame and a main body that are independent of each other. The frame is fixed to the battery module through bolts, while the main body is positioned within the frame without direct fastening to the battery module. This ensures the main body remains intact while achieving secure attachment through the frame structure.
3Device complexity
If the fireproof component uses a integrated design with main body and frame as one piece, then the structure is simpler, but the main body cannot be protected from crushing and cracking during fastening
Solution Approach 1:
The fireproof component is divided into a frame and a main body as separate parts. The frame serves as the structural element that is fastened to the battery module, while the main body serves as the fireproof barrier that is protected from mechanical stress. This segmentation resolves the contradiction by allowing the structure to be sufficiently complex to protect the main body while maintaining overall simplicity in design and assembly.
4Ease of manufacture
If the fireproof component is made as a single integrated part, then production process is simpler, but the main body and frame cannot be optimized separately for material and molding processes
Solution Approach 1:
The fireproof component is segmented into a frame and a main body that can be manufactured separately using optimized materials and processes for each part's specific requirements, then assembled together. This segmentation enables each part to be manufactured with the most suitable process for its function while maintaining ease of overall production through modular assembly.
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 prevents damage to the fireproof component during installation, improves safety and reliability by avoiding crushing and cracking, and allows for separate material and molding processes for the main body and frame, thereby enhancing structural strength and production efficiency.
Implementation Method 1
utilizing a mica board for high-temperature resistance
Data Source
AI summary
This application provides a fireproof component, a battery pack, and a device using the battery pack as a power supply. The fireproof component includes a main body and a frame. The frame includes a body portion, an extension portion, and an opening defined by an inner peripheral face of the body portion. The extension portion is located circumferentially outside the body portion and connected to the body portion. The extension portion extends along a third direction that is perpendicular to a plane defined by the frame and protrudes beyond the body portion. The main body covers the opening of the frame and is connected to the body portion. The main body and the frame of the fireproof component are parts independent of each other, and therefore, can be made of different materials and in different molding processes.