Temperature management device and test system
Solution Overview
Problem
Current battery test processes face challenges in maintaining a stable temperature environment, which is crucial for ensuring safety and performance, especially during charge and discharge cycles, where significant heat is generated.
Innovation Solution
A temperature management device is provided, utilizing a refrigerant loop with a compressor, condenser, expansion valve, and pressure regulating valve to maintain a stable temperature for battery packs, with monitoring devices to regulate refrigerant state and efficiency, ensuring effective cooling and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional cooling methods are used for battery packs during charge and discharge, then cooling is provided, but the temperature drops slowly and cooling efficiency is low
Solution Approach 1:
The patent utilizes phase transition of refrigerant (liquid to gas) in the evaporator to absorb large amounts of heat from the battery pack during charge and discharge, enabling rapid temperature drop. The refrigerant circulates through compression, condensation, expansion, and evaporation cycles, with the evaporation phase specifically designed to maximize heat absorption speed and cooling efficiency.
2Productivity
If refrigerant cooling system is implemented, then cooling efficiency improves, but power consumption increases
Solution Approach 1:
The patent incorporates a monitoring device that detects battery pack temperature and provides feedback to the control system. The controller adjusts the refrigerant circulation parameters (such as expansion valve opening, compressor speed) based on this feedback, optimizing the cooling process to achieve efficient temperature control while minimizing unnecessary power consumption during different cooling stages.
Solution Approach 2:
The refrigerant circulation system is designed with dynamic control capabilities, where the expansion valve and compressor operate at variable speeds rather than fixed rates. This allows the system to adapt refrigerant flow rates to actual cooling demands, reducing power consumption when full cooling capacity is not required while maintaining high cooling efficiency when needed.
3Use of energy by moving object
If pressure regulating valve is added to control refrigerant pressure, then compressor working efficiency improves and power consumption reduces, but device complexity increases
Solution Approach 1:
The patent introduces a pressure regulating valve that dynamically adjusts refrigerant pressure parameters to match the optimal operating range of the compressor. By maintaining appropriate pressure levels, the compressor operates at peak efficiency with reduced power consumption. The pressure regulating valve is integrated into the existing refrigerant circuit, and its addition is justified by the significant energy savings it enables in the high-power consumption compression process.
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 solution enables faster temperature drop for battery packs during testing, improving cooling efficiency and reducing power consumption, while preventing refrigerant waste and ensuring consistent performance and safety.
Implementation Method 1
a compressor; a condenser, where an inlet of the condenser is connected to an outlet of the compressor
Implementation Method 2
a condenser, where an inlet of the condenser is connected to an outlet of the compressor
Implementation Method 3
an expansion valve, where a first inlet of the expansion valve is connected to an outlet of the condenser
Implementation Method 4
The temperature management device is configured to perform temperature management on a battery pack cooled by a refrigerant
Data Source
AI summary
This application discloses a temperature management device and a test system. The temperature management device is configured to perform temperature management on a battery pack cooled by a refrigerant. The temperature management device includes a first port configured to detachably connect to a refrigerant outlet of the battery pack; a second port configured to detachably connect to a refrigerant inlet of the battery pack; a compressor; a condenser; an expansion valve; and a pressure regulating valve, which is configured to regulate pressure of gas discharged from the refrigerant outlet of the battery pack so that a pressure value of gas discharged from the second end of the pressure regulating valve to the inlet of the compressor is within a preset range. The temperature management device and test system of the embodiments of this application can maintain a stable and suitable temperature for the battery pack in a battery pack test.