Battery Cooling Refrigerant Branch Control Without Cabin Air Loss
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Solution Overview
Problem
Existing battery cooling systems that utilize a vehicle's air-conditioning refrigerant system compromise the cooling capacity of the air-conditioning system, leading to increased venting temperature and reduced passenger comfort.
Innovation Solution
A battery cooling system with a control mechanism that adjusts the flow rates of refrigerant through the air-conditioning system and a branch path to prioritize battery cooling, using flow regulators and a control device to manage the electric compressor's target speed based on battery temperature, outside air temperature, and vehicle speed, ensuring efficient cooling while maintaining air-conditioning performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the refrigerant is branched off to cool the battery, then the battery cooling effect is improved, but the air-conditioning system's cooling capacity deteriorates and venting temperature rises
Solution Approach 1:
The patent implements dynamic control of the refrigerant distribution system by adjusting the opening degrees of first and second flow regulators based on real-time temperature conditions. When battery temperature exceeds the threshold, the system dynamically redirects refrigerant flow to the battery cooler while maintaining air-conditioning performance through coordinated control of both flow paths
Solution Approach 2:
The system changes the flow rate parameters of the refrigerant dynamically based on temperature conditions. By adjusting the flow rates through the flow regulators in response to battery temperature and air-conditioning requirements, the system optimizes refrigerant distribution to resolve the contradiction between battery cooling and air-conditioning capacity
2Productivity
If the refrigerant flow rate to the battery cooler is increased, then the battery cooling efficiency is improved, but the air-conditioning system's cooling capacity is reduced
Solution Approach 1:
The system dynamically adjusts the flow rate parameters of refrigerant to both the battery cooler and air-conditioning system based on real-time temperature conditions. By coordinating the opening degrees of both flow regulators, the system optimizes the distribution of refrigerant flow to maintain both battery cooling efficiency and air-conditioning capacity under different operating conditions
Solution Approach 2:
The patent implements a dynamic flow control system that continuously monitors temperature conditions and adjusts refrigerant flow rates accordingly. The control device modifies the flow distribution in real-time, enabling the system to adaptively balance between battery cooling efficiency and air-conditioning cooling capacity based on actual thermal requirements
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
This solution effectively cools high-voltage batteries without compromising the air-conditioning system's capacity, maintaining passenger comfort and efficiently managing battery cooling based on various environmental and operational factors.
Implementation Method 1
a battery cooler which is comprised of a base and a plurality of heat conduction fins is prepared, the battery is placed between two heat conduction fins, and the refrigerant which is used in the refrigeration cycle of the air-conditioning system is branched off and run to a refrigerant passage which is provided inside of the base so as to thereby cool the battery
Implementation Method 2
an outside heat exchanger (11), and an inside heat exchanger (13) which are connected by a refrigerant path (17) through which a first refrigerant flows
Data Source
AI summary
A cooling system of a battery which efficiently cools a high voltage battery which is mounted in an electric vehicle or a hybrid vehicle so as to maintain battery performance by using a refrigeration cycle of an air-conditioning system, which is provided with an electric compressor, outside heat exchanger, inside heat exchanger, and a control device. A refrigerant path of the air-conditioning system for running refrigerant is provided with a branch path having a heat exchanger which bypasses the inside heat exchanger, a medium path connected to the heat exchanger runs another refrigerant for cooling the battery, control valves are provided which adjust the amounts of the refrigerant which flows to the refrigerant path and the branch path, and, when the control valves run the refrigerant to both the refrigerant path and the branch path, the control device increases the speed of the electric compressor.