Thermal Circuit Flow Splitting for Cabin and Battery Heating
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Solution Overview
Problem
Existing thermal management devices face challenges in efficiently distributing heater capabilities between air heating and battery heating requests when both are made simultaneously, leading to inadequate prioritization of air heating over battery heating.
Innovation Solution
A thermal management device with a control unit that manages two thermal circuits, allowing for flow division of a thermal transfer medium between a radiator and a heater core path, prioritizing air heating by adjusting the flow proportion based on temperature deficiencies and heating loads, ensuring simultaneous battery and air heating with prioritization of air heating requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the heater capability is distributed equally between air heating and battery heating when both requests are made simultaneously, then both heating functions can be provided, but the air heating request selected by the driver cannot be prioritized over the battery heating request
Solution Approach 1:
The system dynamically adjusts the flow dividing proportion based on temperature conditions. When the temperature deficiency is large, more flow is directed to the heater core for air heating priority. When the temperature deficiency is small, the flow distribution is adjusted to balance both air heating and battery heating needs, resolving the contradiction between driver priority and heating efficiency
Solution Approach 2:
The control unit changes the flow dividing proportion parameter based on the temperature deficiency value. By adjusting this parameter dynamically according to real-time temperature conditions, the system can prioritize air heating when needed while maintaining efficient heating capability distribution, thus resolving the contradiction between ease of operation and productivity
2Speed
If more thermal transfer medium flow is directed to the heater core for air heating priority, then air heating responsiveness is improved, but the battery heating capability is reduced
Solution Approach 1:
The system dynamically adjusts the flow dividing proportion based on temperature conditions. When the temperature deficiency is large, more flow is directed to the heater core for air heating priority. When the temperature deficiency is small, the flow distribution is adjusted to balance both air heating and battery heating needs, resolving the contradiction between driver priority and heating efficiency
Solution Approach 2:
The control unit changes the flow dividing proportion parameter based on the temperature deficiency value. By adjusting this parameter dynamically according to real-time temperature conditions, the system can prioritize air heating when needed while maintaining efficient heating capability distribution, thus resolving the contradiction between ease of operation and productivity
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
Enables effective simultaneous battery and air heating by optimizing heater resource allocation, prioritizing air heating requests while maintaining battery heating capabilities, thus improving responsiveness to both heating demands.
Implementation Method 1
a heater that heats the second thermal transfer medium
Implementation Method 2
a second radiator that is disposed on the first path, and is configured such that heat is able to be exchanged between the first thermal transfer medium flowing through the first radiator and the second thermal transfer medium flowing through the second radiator
Implementation Method 3
a heating appliance that is disposed on the second path for performing air heating of a cabin of the vehicle using the second thermal transfer medium as a heat source
Data Source
AI summary
A thermal management device includes a first thermal circuit, a second thermal circuit, and a control unit. The first thermal circuit includes a first radiator and a battery. The second thermal circuit includes a heater, a temperature sensor, a first path, a second radiator, a second path, a heating appliance, and a flow rate adjusting unit. When a battery heating request and an air heating request are made, the control unit heats a second thermal transfer medium, and divides the flow of the second thermal transfer medium to the first and second paths. When a deficiency value of measured temperature with respect to a target temperature of the second thermal transfer medium is greater than a first threshold value in flow dividing processing, a second flow dividing proportion of the second path is set to be greater than a first flow dividing proportion of the first path.