Eccentric Battery Pack Handling Stability
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Solution Overview
Problem
Conventional power storage apparatuses with a large longer dimension and small shorter dimension tend to lose balance during handling due to a lighter connector box, leading to potential instability and safety concerns.
Innovation Solution
A battery pack design where the battery group is eccentrically located on one side in the shorter direction of the housing, shifting the center of gravity and improving stability during handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the connector box is provided at one end in the longer direction, then the power storage apparatus can be easily assembled and maintained, but the center of gravity deviates causing balance loss and instability during handling
Solution Approach 1:
The patent applies asymmetry by intentionally positioning the heavy battery group eccentrically in the shorter direction rather than symmetrically at the center. This asymmetric weight distribution creates a deliberate shift in the center of gravity toward the shorter direction, which compensates for the asymmetric placement of the lightweight connector box in the longer direction, thereby achieving balance during handling while maintaining manufacturing simplicity
2Ease of manufacture
If the battery group is positioned centrally in the housing, then the structure is symmetric and easy to manufacture, but the center of gravity does not compensate for the lightweight connector box causing balance issues
Solution Approach 1:
The patent deliberately introduces asymmetry in the battery group positioning within the housing. Instead of placing the battery group at the geometric center, it is positioned eccentrically in the shorter direction, creating an asymmetric weight distribution that shifts the center of gravity to compensate for the lightweight connector box, thereby improving handling stability without complicating the manufacturing process
3Quantity of substance
If the power storage apparatus has a large longer dimension and small shorter dimension, then it can accommodate more battery cells, but it becomes unstable when held by workers due to center of gravity deviation
Solution Approach 1:
The patent addresses the stability issue by utilizing the shorter direction dimension to position the battery group eccentrically, rather than only considering the longer direction for capacity. This dimensional approach allows the heavy battery group to be positioned in the shorter direction to shift the center of gravity, compensating for the lightweight connector box and improving handling stability while maintaining the capacity benefits of the elongated form factor
Data Source
AI summary
A battery pack provided with a plurality of battery cells, the battery pack making it possible to achieve higher safety than before during handling work. The battery pack is provided with a battery group in which the plurality of battery cells are stacked, and a housing in which the battery group is accommodated. The housing, with respect to a first direction and a second direction perpendicular to a height direction of the housing and to each other, has a dimension in the first direction which is made smaller than a dimension in the second direction. The battery group is eccentrically located on one side in the first direction in the housing.