Energy Storage Box Liquid Cooling for Battery and PCS Heat Dissipation
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Solution Overview
Problem
The existing thermal management systems in energy storage boxes for micro-grids and new energy power plants, such as wind and photovoltaic power plants, suffer from reduced efficiency due to the differences in air-cooling and liquid-cooling methods for the power conversion system (PCS) and battery pack, leading to inefficient heat dissipation and increased energy consumption.
Innovation Solution
An integrated thermal management system with a first and second loop, utilizing a refrigerant and a solenoid valve to unify heat dissipation methods, allowing temperature-adjusted liquid flow between loops to optimize heat dissipation and reduce energy consumption, while omitting air-cooling for the PCS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air-cooling and liquid-cooling methods are used separately for the power conversion system and battery pack, then each component can be cooled according to its specific requirements, but the thermal management efficiency is reduced and energy consumption increases
Solution Approach 1:
The patent merges the air-cooling system for the power conversion system and the liquid-cooling system for the battery pack into a unified liquid-cooling thermal management system. Both components are cooled through liquid circulation, eliminating the need for separate air-cooling equipment and reducing overall energy consumption while improving thermal management efficiency.
Solution Approach 2:
The liquid cooling system is designed to serve multiple functions: it cools the battery pack directly and also cools the power conversion system through heat exchangers. This multi-functional approach allows a single system to replace multiple specialized cooling systems, reducing complexity and energy consumption.
2Temperature
If air-cooling heat dissipation structure is used for the power conversion system, then the system can dissipate heat, but the space occupation ratio increases and energy density decreases
Solution Approach 1:
The patent eliminates the separate air-cooling heat dissipation structure for the power conversion system by integrating its cooling function into the liquid-cooling system. The liquid cooling circuit passes through the power conversion system components, allowing heat dissipation without requiring additional air-cooling equipment and space.
Solution Approach 2:
The patent uses liquid hydraulics (coolant circulation) instead of air cooling to dissipate heat from the power conversion system. The liquid coolant flows through heat exchangers integrated with the power conversion system, providing efficient heat transfer in a compact manner that reduces space occupation ratio.
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 enhances thermal management efficiency, reduces energy consumption, and decreases the overall structure size, thereby increasing energy density and storage capacity in energy storage stations.
Implementation Method 1
the first heat exchanger and the first liquid path are correspondingly disposed; a refrigerant flows in the first loop, the compressor is configured to control the refrigerant to flow in the first loop so as to dissipate heat of a preset liquid in the first liquid path by the refrigerant
Implementation Method 2
the second loop includes a radiator and a solenoid valve, the second liquid path is in communication with the radiator
Data Source
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Figure 3
Figure 4~5
AI summary
The present application relates to the technical field of thermal management of energy storage boxes, and provides an energy storage box, including a box body, a battery pack, a power conversion system, and a thermal management system. The box body includes a battery cabin, the battery pack and the power conversion system are located in the battery cabin. The thermal management system has a first loop and a second loop. The first loop dissipates heat of a cooling liquid in a first liquid path of the battery pack through a refrigerant. The second loop is in communication with a second liquid path of the power conversion system so as to dissipate heat of the power conversion system by a cooling liquid. The cooling liquid in the second liquid path may also flow to the first liquid path through a solenoid valve so as to form compensation for heat dissipation of the first liquid path. In this way, the thermal management system achieves the unification of heat dissipation manners of the energy storage box, the integration level of the energy storage box is improved, the overall structure of the energy storage box is reduced, and the space occupation ratio of the energy storage box is reduced, thereby improving the energy density and energy storage efficiency of the station.