Waste Heat Recovery Circuit for Battery Heating Without Radiator Loss
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Solution Overview
Problem
In existing waste heat recovery systems for engineering machinery, heat generated by hydraulic devices is wasted due to inefficient utilization, as a portion of the heat is absorbed by radiators, increasing energy consumption and reducing the effectiveness of heating battery packs and other components.
Innovation Solution
A waste heat recovery system that includes a network of three-way valves, heat exchangers, and water pumps to form dedicated circulation circuits, ensuring that heat from hydraulic and motor electronic control assemblies is directly transferred to battery packs and passenger compartments without passing through radiators, thereby maximizing heat utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the cooling liquid passes through the radiator to heat the battery pack using heat from the hydraulic device, then the battery pack can be heated, but the radiator absorbs a portion of the heat, resulting in heat waste and reduced heating efficiency
Solution Approach 1:
The patent extracts the radiator from the heat transfer path when heating the battery pack. By using three-way valves to control the cooling liquid flow, the system bypasses the radiator during battery heating operations, preventing heat absorption by the radiator and ensuring all heat from the hydraulic device is transferred to the battery pack.
Solution Approach 2:
The patent implements dynamic flow path switching using three-way valves that can redirect the cooling liquid based on operational requirements. The system dynamically selects whether the cooling liquid passes through the radiator or bypasses it, optimizing heat utilization for different heating scenarios (battery heating vs. compartment heating).
2Loss of energy
If the cooling liquid passes through the radiator, then heat dissipation can be achieved, but heat generated by the hydraulic device cannot be fully utilized for heating purposes
Solution Approach 1:
The system uses three-way valves to dynamically switch between different operational modes: battery heating mode (bypassing radiator), compartment heating mode (using radiator), and heat dissipation mode. This dynamic switching enables the system to adapt to different heating requirements while maximizing heat utilization efficiency.
Solution Approach 2:
The patent creates a multi-functional thermal management system that can perform multiple functions: heating the battery pack, heating the passenger compartment, and dissipating heat. The three-way valves enable the system to switch between these functions, making the thermal management system versatile while maintaining high heat utilization efficiency.
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 effectively utilizes all generated heat for heating purposes, reducing waste and minimizing energy consumption by preventing radiator absorption, thus enhancing the efficiency of battery and compartment heating.
Implementation Method 1
a first heat exchanger, two ends of the first heat exchanger communicating with a third valve port of the first three-way valve and a first valve port of the second three-way valve, respectively
Data Source
AI summary
A waste heat recovery system includes a hydraulic device, a first three-away valve, a second three-way valve, a first heat exchanger, an oil heat dissipation system water pump and a battery pack. A first valve port of the first three-way valve communicates with an end of the hydraulic device, a second valve port of the second three-way valve communicates with another end of the hydraulic device, and two ends of the first heat exchanger respectively communicate with a third valve port of the first three-way valve and a first valve port of the second three-way valve. An end of the oil heat dissipation system water pump is connected to the first heat exchanger, and two ends of the battery pack respectively communicate with another end of the oil heat dissipation system water pump and the first heat exchanger.