Power Storage Module Condensation Prevention Design
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Solution Overview
Problem
Condensed water formation on power storage cell surfaces leads to potential liquid junctions, which are difficult to prevent due to the presence of concave-convex electrode parts, making it costly to cover the entire surface with a condensation-preventing sheet.
Innovation Solution
A power storage module design featuring alternately stacked power storage cells and holders, with a condensation-preventing sheet covering only certain areas, and an insulating bus bar plate connecting cells, along with thermistor retaining portions and partition walls to manage and discharge condensed water effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the whole surface of the power storage cell is covered with a condensation-preventing sheet, then condensed water occurrence is minimized, but manufacturing cost increases
Solution Approach 1:
The patent applies local quality by covering only specific high-risk areas (cooled surfaces) with condensation-preventing sheets rather than the entire surface. The insulating bus bar plate and holder structures provide localized protection in critical areas where liquid junctions are most likely to form, optimizing the balance between condensation prevention and manufacturing cost.
2Ease of manufacture
If only part of the surface is covered with a condensation-preventing sheet, then manufacturing cost is reduced, but condensed water occurrence increases on uncovered areas
Solution Approach 1:
The patent introduces intermediary structures (insulating bus bar plate, holder, and partition wall) that act as mediators between the uncovered metal surfaces and the environment. These intermediaries prevent direct contact between condensed water and metal components, providing protection without requiring complete surface coverage with expensive condensation-preventing sheets.
3Temperature
If the power storage cell surface is exposed to air, then heat dissipation is improved, but condensed water formation increases
Solution Approach 1:
The patent segments the power storage cell surface into different functional zones: cooled surfaces that require condensation prevention and non-cooled surfaces that can remain exposed for heat dissipation. This segmentation allows simultaneous optimization of both heat dissipation and condensation prevention by applying protective measures only where necessary.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Minimizes condensed water occurrence and prevents liquid junctions by covering non-covered portions with holders and bus bar plates, ensuring effective heat insulation and preventing electrical contact between cells and metal components.
Implementation Method 1
a cooled surface of the power storage cell, on which condensed water particularly easily occurs, is covered by a condensation-preventing sheet so as to carry out heat insulation
Implementation Method 2
the non-covered portion is covered by the power storage cell holder, the insulator, and the bus bar plate
Implementation Method 3
the plurality of power storage cell holders comprise a thermistor retaining portion that retains a thermistor for measuring a temperature of the power storage cell
Data Source
AI summary
A plurality of power storage cells and a plurality of power storage cell holders are stacked alternately in the stacking direction. End plates are superimposed at opposite ends of the power storage cells and power storage cell holders. The end plates are connected by a frame, the frame is covered by an insulator, and the plurality of power storage cells are electrically connected by a bus bar plate, forming a power storage module. Since the surface of the power storage cell is formed from a covered portion covered by the condensation-preventing sheet and a non-covered portion not covered by the condensation-preventing sheet, and the non-covered portion is covered by the power storage cell holder, the insulator, and the bus bar plate, the non-covered portion is covered as much as possible to provide heat insulation, minimizing occurrence of condensed water and preventing formation of a liquid junction.