Tool Battery Housing Partitioning for Water Ingress Protection
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Solution Overview
Problem
Existing tool batteries are prone to water ingress through openings for the lock claw and operation member, which can lead to short-circuiting of battery cells, causing failure when exposed to moisture.
Innovation Solution
The tool battery design incorporates a partitioned battery housing with a hook accommodation chamber and a battery cell accommodation chamber, preventing water from entering the cell chamber, and includes a discharge hole for rapid water removal from the hook chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If openings are provided in the battery housing for the lock claw and operation member, then the hook can be operated to lock and unlock the tool battery, but water can enter the battery housing through these openings and reach the battery cells
Solution Approach 1:
The battery housing is divided into two separate chambers: a first chamber for accommodating the hook and a second chamber for accommodating the battery cells. This segmentation prevents water that enters through the operation opening in the first chamber from reaching the battery cells in the second chamber, thus resolving the contradiction between operational accessibility and water protection.
2Reliability
If the hook accommodation chamber and battery cell accommodation chamber are separated, then water entering the hook chamber cannot reach the battery cells, but the device complexity increases
Solution Approach 1:
The partition wall that separates the first and second chambers is integrated directly into the battery housing structure itself, rather than being a separate component. This merging of the partition function into the existing housing design achieves water separation without significantly increasing device complexity, as the housing serves dual purposes: external protection and internal chamber separation.
Data Source
AI summary
A battery housing of a tool battery has a hook accommodation chamber and a battery cell accommodation chamber defined therein. A hook is accommodated within the hook accommodation chamber and is operable to lock and unlock the tool battery against a tool body of a power tool. Battery cells are disposed within the battery cell accommodation chamber. The hook accommodation chamber and the battery cell accommodation chamber are partitioned from each other.