Vehicle Thermal Loop Using Motor-Inverter Heat for Battery Warming
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Solution Overview
Problem
Existing vehicle temperature control systems face inefficiencies in heating batteries at low temperatures, leading to reduced performance and increased costs due to reliance on engine heating and PTC heaters.
Innovation Solution
A temperature control device incorporating a motor control circuit and a heat exchange medium circulation loop, utilizing a three-phase inverter and alternating current motor to generate heat for battery heating, replacing traditional heaters and improving heating efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If an engine is used to heat the battery at low temperature, then the battery can be warmed up, but the heating efficiency is low due to the engine's low heat efficiency
Solution Approach 1:
The motor heats the battery using its own generated heat during operation or idle states, rather than relying on a separate engine or heating system. The motor's natural byproduct (heat) is utilized to warm the battery, achieving self-service heating without additional energy loss.
Solution Approach 2:
The motor serves dual functions: propulsion and heating. During vehicle operation or idle periods, the motor not only drives the vehicle but also generates heat that can be transferred to the battery, making a single component perform multiple functions and eliminating the need for separate heating systems.
2Loss of energy
If a PTC heater is used to heat the battery, then the heating efficiency is improved, but the cost is increased and secondary costs increase if damaged
Solution Approach 1:
The motor's inherent heat generation capability is utilized for battery heating, eliminating the need for separate heating components like PTC heaters. This self-service approach uses an existing component's byproduct (heat) to solve the heating problem, reducing both initial and maintenance costs.
Solution Approach 2:
The heating function is extracted from the motor's waste heat rather than requiring a separate heating system. By taking out and utilizing the motor's natural heat output, the system eliminates the need for additional heating components, reducing overall system cost and complexity.
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
Enhances heating efficiency and reduces costs by utilizing motor-generated heat for battery warming, improving battery performance in cold conditions without the need for additional heating devices.
Implementation Method 1
enables the power supply module to charge and discharge the energy storage module and the three phases of coils alternately by controlling the three-phase inverter, so that the three-phase inverter and the three-phase alternating current motor heat a heat exchange medium flowing through at least one of the three-phase inverter and the three-phase alternating current motor
Implementation Method 2
the three-phase inverter and the three-phase alternating current motor heat a heat exchange medium flowing through at least one of the three-phase inverter and the three-phase alternating current motor via the electrically driven cooling loop
Implementation Method 3
a heat exchange medium circulation loop includes a first valve electrically connected to the control module. At least one of the three-phase inverter and the three-phase alternating current motor and the first valve form an electrically driven cooling loop through a heat exchange medium pipeline
Implementation Method 4
the heat exchange medium flowing through at least one of the three-phase inverter and the three-phase alternating current motor
Data Source
AI summary
A vehicle and a temperature control device thereof are disclosed. The temperature control device includes a motor control circuit and a heat exchange medium circulation loop. The motor control circuit includes a switch module, a three-phase inverter, a three-phase alternating current motor, and a control module. The heat exchange medium circulation loop includes a first valve electrically connected to the control module. At least one of the three-phase inverter and the three-phase alternating current motor and the first valve form an electrically driven cooling loop through a heat exchange medium pipeline. The first valve and a component to be heated form a cooling loop through a heat exchange medium pipeline.