Power Storage Module Insulating Layer Thermal Management
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Solution Overview
Problem
Conventional power storage modules face challenges in suppressing thermal influences between batteries, reducing weight and volume, and improving energy density while maintaining reliability, as thinner walls for closer battery placement increase manufacturing costs and decrease strength.
Innovation Solution
A power storage module design featuring power storage devices with cylindrical cases covered by insulating layers that regulate the distance between adjacent devices, reducing the need for thick holder walls and enhancing energy density while maintaining reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the distance between adjacent power storage devices is reduced to improve energy density, then the energy density of the power storage module is improved, but the thermal influence on adjacent power storage devices increases
Solution Approach 1:
An insulating layer is introduced as an intermediary substance between adjacent power storage devices. This insulating layer physically separates the devices while occupying minimal space, allowing the devices to be positioned closer together for improved energy density while simultaneously preventing thermal influence from transferring between adjacent devices.
Solution Approach 2:
The insulating layer is implemented as a thin film structure that covers the outer peripheral surface of the power storage devices. This thin film provides sufficient thermal insulation to suppress heat transfer while being thin enough to allow close spacing of adjacent devices, thereby achieving both high energy density and thermal protection.
2Quantity of substance
If the wall thickness of the holder is reduced to allow closer battery placement, then the energy density is improved, but the manufacturing precision becomes difficult to maintain
Solution Approach 1:
The insulating layer serves as a self-contained intermediary that carries the dimensional control function. Instead of relying on the holder wall thickness to define the spacing between batteries, the insulating layer on each battery provides a consistent reference dimension, making the overall positioning less sensitive to holder manufacturing variations.
Solution Approach 2:
Each power storage device with its insulating layer essentially positions itself relative to adjacent devices. The insulating layer on each device provides the necessary dimensional reference and spacing control, reducing the burden on the holder structure to maintain precise dimensions.
3Quantity of substance
If the wall thickness of the holder is reduced to allow closer battery placement, then the energy density is improved, but the strength of the holder decreases
Solution Approach 1:
The insulating layer acts as a mediator that transfers the mechanical support function from the holder walls to the power storage devices themselves. Each device with its insulating layer becomes self-supporting to some extent, reducing the load on the holder structure and allowing thinner holder walls without compromising overall strength.
Solution Approach 2:
The insulating layer functions as a protective shell that not only provides thermal insulation but also contributes to the mechanical integrity of each power storage device. This shell structure allows the devices to be closer together while maintaining sufficient strength and protection.
4Weight of stationary object
If the wall thickness of the holder is reduced, then the weight of the holder is reduced, but the reliability of the power storage module decreases
Solution Approach 1:
The insulating layer serves as a reliable intermediary that ensures consistent spacing and thermal isolation between devices. This reliable insulation layer compensates for the reduced structural capacity of thinner holder walls, maintaining overall module reliability while reducing holder weight.
Solution Approach 2:
The combination of the insulating layer material and the holder material creates a composite system where each component performs optimized functions. The insulating layer provides thermal protection and dimensional stability, while the thinner holder provides structural support, achieving both weight reduction and maintained reliability through material optimization.
Data Source
AI summary
A power storage module including: a plurality of power storage devices; and a holder that holds the plurality of power storage devices, wherein each of the power storage devices includes a case including an opening, an electrode assembly accommodated in the case and including a first electrode and a second electrode, and a sealing member that seals the opening, the case includes a cylindrical cylinder part, an opening end part corresponding to the opening provided at one end part of the cylinder part, and a bottom part that closes another end part of the cylinder part, in each of the plurality of power storage devices, at least a part of an outer peripheral surface of the cylinder part is covered with an insulating layer, and positions of a pair of the power storage devices adjacent to each other included in the plurality of power storage devices are regulated by the insulating layer.