Battery Pack Drainage Structure to Prevent Binder-Clogged Drain Holes
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Solution Overview
Problem
The accumulation of liquid within the case of a battery pack can cause short-circuits between the positive and negative electrodes of the battery module, leading to performance issues and safety risks.
Innovation Solution
A battery pack design featuring a case with a drain hole and a blocking member that prevents the binder from entering the drain hole, allowing liquid to flow out while preventing clogging, and a reservoir cavity to store any discharged liquid, thereby reducing the risk of short-circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a drain hole is provided in the case to discharge liquid, then liquid drainage capability is improved, but the drain hole may be clogged by binder flowing from the battery module
Solution Approach 1:
A blocking member is introduced as an intermediary element between the battery module and the drain hole. This blocking member prevents binder from entering the drain hole while still allowing liquid to pass through, thus resolving the contradiction between drainage capability and clogging risk
Solution Approach 2:
The blocking member is divided into multiple blocking portions with notches, creating segmented pathways. The notches allow liquid to flow through while the solid portions block binder, segmenting the function into selective permeability
2Stability of the object's composition
If the binder is used to fix the battery module to the case, then the battery module is securely mounted, but the binder may flow and clog the drain hole causing short-circuits
Solution Approach 1:
The blocking member serves as a mediator that allows the binder to maintain its fixing function while preventing it from reaching the drain hole, thus eliminating the harmful effect of binder-induced clogging without compromising mounting stability
Solution Approach 2:
The blocking member is pre-installed in the case before or during battery module assembly, creating a preventive barrier that stops binder flow before it can cause clogging, addressing the problem in advance
Data Source
AI summary
A battery pack for optimizing the structure of the battery pack includes a case, a battery module and a blocking member. The case includes an accommodating cavity and a drain hole in communication with the accommodating cavity. The battery module is contained inside the accommodating cavity. The blocking member is mounted to the case, wherein the blocking member is disposed on one side of the battery module in a width direction. At least a part of the blocking member is arranged between the battery module and the drain hole to block a binder for fixing the battery module from entering the drain hole. The reservoir cavity is provided, such that the liquid flow into a reservoir portion to prevent dangers such as short-circuit occurring in the battery module when liquid is accumulated inside the case.