Battery Pack Housing Structure for Short-Circuit Isolation
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Solution Overview
Problem
Conventional battery packs are prone to short circuits due to external impacts and accidental contacts between metal plates during welding, as the metal plates are densely arranged and exposed, increasing the risk of electrical connections being compromised.
Innovation Solution
The battery pack design incorporates a cell housing with a slit and perforated hole structure that allows metal plates to be bent and inserted, creating a physical barrier to prevent contact, and a short circuit prevention block to isolate adjacent metal plates, minimizing exposure and enhancing fixability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If metal plates are densely arranged to increase energy density, then the battery pack can accommodate more battery modules in limited space, but the risk of short circuit increases due to accidental contact between metal plates
Solution Approach 1:
An insulating housing structure is introduced as an intermediary between adjacent metal plates. The housing includes insulating side walls that physically separate and isolate the metal plates, preventing accidental contact while maintaining the dense arrangement of battery modules for high energy density.
2Ease of operation
If metal plates are exposed at outer sides of battery modules for electrical connection, then electrical connectivity is achieved, but vulnerability to external impact and accidental contact increases
Solution Approach 1:
The metal plates are covered with insulating side walls forming a housing structure that acts as a protective shell. This housing encloses the metal plates while allowing electrical connections to be made through designated openings, protecting against external impacts and accidental contact.
3Volume of stationary object
If battery modules are closely arranged to maximize space utilization, then energy density increases, but gaps between modules become narrow increasing short circuit risk
Solution Approach 1:
The housing structure is divided into multiple insulating side walls that segment the space between adjacent battery modules. Each side wall acts as an independent insulating barrier, maintaining narrow gaps for space efficiency while preventing electrical contact between modules.
Data Source
AI summary
Disclosed is a battery pack, which includes a plurality of cell assemblies respectively having a cell housing for accommodating battery cells and arranged in a front and rear direction; a first metal plate mounted at a top portion of the cell housing and integrally contacting upper electrode terminals of the battery cells; and a second metal plate mounted at a bottom portion of the cell housing and integrally contacting lower electrode terminals of the battery cells. The cell housing includes a side portion that has a slit forming a gap into which a part of the first metal plate and a part of the second metal plate are bent and inserted in an upper and lower direction and a perforated hole formed in a direction intersecting the slit. The bent part of the first metal plate mounted to any one cell housing is overlapped with the bent part of the second metal plate mounted to another the cell housing adjacent thereto inside the perforated hole.