Cell Spacer Cooling Plate for Submersible Battery Heat Control
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Solution Overview
Problem
Submersible cooling technology faces challenges in effectively dissipating heat from the central portions of stacked battery cells and maintaining heat management during thermal runaway situations, leading to potential safety issues and reduced energy density.
Innovation Solution
A submersible energy storage device with a cell spacer assembly that includes a cooling plate with perpendicular channels for fluid flow and insulators to manage heat distribution and prevent thermal runaway, utilizing an insulating fluid for efficient cooling and fire suppression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If submersible cooling technology is used to cool stacked battery cells, then cooling efficiency is improved, but heat dissipation in central portions of battery cells deteriorates
Solution Approach 1:
The cooling plate is segmented into multiple channels (first channel along longitudinal direction, second channel along transverse direction) that divide and redirect the insulating fluid flow to reach central portions of battery cells that were previously inaccessible, thereby resolving the heat dissipation ineffectiveness in central regions
Solution Approach 2:
The cooling system transitions from a single-direction cooling approach to a two-dimensional channel network with both longitudinal and transverse flow paths, enabling the insulating fluid to access and cool central portions of battery cells from multiple directions simultaneously
2Temperature
If submersible cooling technology is used, then cooling performance is improved, but heat management during thermal runaway deteriorates
Solution Approach 1:
The cooling plate provides localized cooling zones through its channel configuration, allowing different regions of the battery stack to receive appropriate cooling attention. During thermal runaway, this localized approach helps contain and manage heat in specific areas rather than allowing uniform heat distribution, improving overall heat management stability
Solution Approach 2:
The insulating fluid acts as an intermediary substance that not only cools battery cells under normal conditions but also serves as a heat transfer medium and fire suppression agent during thermal runaway, absorbing and redistributing heat while preventing flame propagation between cells
3Temperature
If device complexity is increased to improve heat management, then heat dissipation is improved, but energy density deteriorates
Solution Approach 1:
The insulating fluid serves multiple functions simultaneously: it acts as a coolant during normal operation, a heat transfer medium during thermal events, and a fire suppression agent. This multi-functionality eliminates the need for separate cooling systems, maintaining energy density while achieving effective heat dissipation through the integrated cell spacer assembly cooling structure
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
Enhances heat management and stability by reducing temperature deviations and minimizing secondary accidents like fires and explosions, while maintaining energy density.
Implementation Method 1
an insulating fluid in the accommodation space, in which the cell stack is immersed, and configured to cool the cell stack
Implementation Method 2
the insulating fluid is capable of flowing in the first direction and the second direction through the first channel and the second channel respectively
Implementation Method 3
heat dissipation is well performed toward the insulating fluid positioned in an emission direction of flames and gases
Data Source
AI summary
A submersible energy storage device includes: a housing having an accommodation space therein; a cell stack in the housing; and an insulating fluid in the accommodation space, in which the cell stack is immersed, and configured to cool the cell stack, where the cell stack comprises a plurality of battery cells stacked in a stacking direction, and a cell spacer assembly provided between two adjacent battery cells among the plurality of battery cells, where the cell spacer assembly comprises a cooling plate having a first channel along a first direction of a plane perpendicular to the stacking direction of the plurality of battery cells and a second channel along a second direction of the plane, and where the first channel and the second channel are in fluid communication through a crossing position that connects the first channel and the second channel.