Power Electronics Cooling Layout for Dual-Temperature Battery Storage
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Solution Overview
Problem
Existing cooling systems for battery energy storage systems are inefficient as they cool power electronics and batteries to the same extent, despite differing temperature requirements, leading to increased energy consumption.
Innovation Solution
A dual-temperature region cooling system is implemented, where power electronics components are cooled using ambient air isolated from the battery compartment, reducing the load on the HVAC system and optimizing energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a single HVAC cooling system is used for both power electronics and batteries, then both components can be cooled, but energy consumption increases due to over-cooling power electronics
Solution Approach 1:
The cooling system is segmented into two independent zones: a first cooling zone for power electronics components and a second cooling zone for battery modules. Each zone has its own temperature control, allowing power electronics to be cooled to lower temperatures while batteries are cooled separately, eliminating the energy waste of over-cooling power electronics while maintaining reliable temperature control for both components.
Solution Approach 2:
Different cooling requirements are applied to different components: power electronics components receive intensive cooling to maintain lower operating temperatures, while battery modules receive appropriate cooling based on their specific thermal needs. This localized quality approach ensures each component operates in its optimal temperature range without unnecessary energy consumption from uniform over-cooling.
2Reliability
If power electronics are cooled to the same extent as batteries, then both components are protected from overheating, but the cooling system becomes less efficient
Solution Approach 1:
The system divides the cooling function into separate segments for power electronics and batteries, each with independent temperature control. This allows power electronics to be protected from overheating through dedicated cooling while avoiding the inefficiency of applying the same cooling intensity to batteries, thereby improving overall cooling system efficiency.
Solution Approach 2:
The cooling intensity and temperature setpoints are customized for each component type: power electronics receive stronger cooling to maintain lower temperatures for optimal performance and protection, while batteries receive cooling tailored to their thermal characteristics. This local quality differentiation ensures both components are protected from overheating without sacrificing cooling system efficiency.
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
The system effectively isolates and separately cools components with different temperature tolerances, protecting sensitive components and reducing energy consumption by minimizing the need for HVAC cooling of power electronics.
Implementation Method 1
an air conduit extending through the second housing. The air conduit is configured to channel ambient air external to the first housing through the higher temperature region to cool the at least one power electronics component
Implementation Method 2
a first housing including thermal insulation. The first housing defines a lower temperature region... an electronics assembly positioned within the lower temperature region... a second housing including thermal insulation. The second housing defines a higher temperature region that is thermally isolated from the lower temperature region
Data Source
AI summary
An energy storage system is provided. The energy storage system includes a first housing comprising thermal insulation, the first housing defining a lower temperature region, at least one energy storage module positioned within said first housing, and an electronics assembly positioned within the lower temperature region of said first housing. The electronics assembly includes a second housing comprising thermal insulation, the second housing defining a higher temperature region that is thermally isolated from the lower temperature region, at least one power electronics component positioned within the higher temperature region of the second housing, and an air conduit extending through said second housing, the air conduit configured to channel ambient air external to the first housing through the higher temperature region to cool said at least one power electronics component.