Battery Pack Venting Structure to Prevent Gas Backflow
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Solution Overview
Problem
Existing battery packs face issues with venting gas discharge inefficiency and backflow, leading to thermal runaway propagation and potential explosions.
Innovation Solution
A battery pack design featuring a venting plate and restriction member at the venting inlet to prevent backflow, combined with a gas venting channel and outlet mechanism to efficiently discharge venting gas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If a battery pack is disassembled to replace a faulty battery module, then the faulty module can be replaced, but a large number of screws must be removed and reinstalled which increases labor time and complexity
Solution Approach 1:
The battery pack is divided into multiple independent battery modules, each with its own housing. The faulty module can be removed and replaced independently without disassembling the entire battery pack, reducing the number of screws that need to be handled during replacement.
Solution Approach 2:
The battery modules are nested within the battery pack housing in a modular arrangement. Each module contains batteries arranged in series, and the modules themselves are arranged in parallel within the pack, allowing for hierarchical replacement at the module level rather than individual battery level.
2Quantity of substance
If batteries are arranged in parallel to increase capacity, then the battery capacity increases, but the voltage remains low requiring series connection which increases voltage but reduces capacity
Solution Approach 1:
The battery system is segmented into multiple modules, where each module contains batteries connected in series to achieve the required voltage. Multiple such modules are then connected in parallel to increase the overall capacity while maintaining the voltage level, thus resolving the trade-off between capacity and voltage.
3Reliability
If the battery pack is sealed to protect against environment, then protection is improved, but maintenance and replacement of individual batteries becomes difficult
Solution Approach 1:
The battery pack is segmented into modular units with individual housings for each module. This segmentation allows the pack to remain sealed for environmental protection while enabling easy removal and replacement of individual modules through access panels, maintaining both reliability and ease of repair.
Data Source
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AI summary
The present technology relates to a battery pack accommodating a battery cell or battery module and relates to a battery pack capable of efficiently discharging a venting gas generated in the battery pack to the outside of the battery pack through a venting inlet formed in the side frame and preventing the venting gas from flowing back into the battery pack by a backflow prevention unit capable of opening and closing the venting inlet in one direction.