Rotating Battery Pack Lock Tongue for Stable EV Bracket Fixing
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Solution Overview
Problem
Existing battery pack mounting methods for electric vehicles face challenges with weak connections between the battery pack and the bracket, requiring complex multi-point locking mechanisms that are not easily accessible for quick locking and unlocking.
Innovation Solution
A locking mechanism featuring a rotatable lock tongue and lock shaft with a higher rotary shaft center than the lock shaft center, allowing for easy conversion between locked and unlocked states, ensuring stability and reliability even during vehicle turbulence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-point locking method is used to secure the heavy battery pack, then the connection strength and reliability are improved, but the device complexity and operational difficulty increase
Solution Approach 1:
The locking mechanism is divided into two functional parts: a lock base that remains stationary on the bracket and a lock tongue that rotates to engage/disengage. This segmentation allows the complex multi-point locking function to be achieved through a simpler rotational motion of the lock tongue, reducing operational complexity while maintaining reliable connection through multiple locking points.
2Reliability
If a complex multi-point locking method is used, then the battery pack connection reliability is improved, but the ease of operation for quick locking and unlocking deteriorates
Solution Approach 1:
The lock tongue is designed as a dynamic rotating component that can quickly transition between locked and unlocked positions. This dynamic design allows the operator to achieve secure locking or unlocking with a simple rotational motion, significantly improving ease of operation compared to static or multi-step locking mechanisms, while the lock base provides stable anchoring points for reliable connection.
3Reliability
If the shaft center of the rotary shaft is positioned higher than the lock shaft center, then the locking stability during vehicle turbulence is improved, but the device structure becomes more complex
Solution Approach 1:
The lock tongue structure employs asymmetric design where the rotary shaft is deliberately positioned at a height different from the lock shaft center. This asymmetric positioning creates a specific geometric relationship that generates stabilizing moments during vehicle turbulence, preventing unintended unlocking. The asymmetric structure achieves enhanced locking stability through careful geometric design rather than adding complex components.
Data Source
AI summary
Disclosed are a locking mechanism, a battery bracket, an electric vehicle, and a method for locking and unlocking a battery pack. The locking mechanism comprises a lock base and a lock tongue; the lock tongue is rotatably mounted on the lock base around a rotary shaft; the lock base is provided with an accommodating cavity; the lock tongue is rotated so that a lock shaft located within the accommodating cavity is in a locked state and an unlocked state. When the lock shaft moves in the accommodating cavity, the lock tongue may be driven to rotate downward, preventing the lock tongue from rotating upward and causing the lock shaft to convert into the unlocked state, and improving the reliability of fixing a battery pack.