Multi-Channel Direct Cooling Plate for Battery Temperature Uniformity
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Solution Overview
Problem
Traditional power battery coolers struggle to efficiently manage temperature differences across power batteries with high energy density and large volume, leading to uneven heat generation and reduced service life.
Innovation Solution
A direct cooling plate with multiple heat exchange channels, each with independent inlet and outlet configurations, is designed to accommodate different temperature regions of the battery, allowing for adjustable refrigerant flow rates and pressures to match cooling/heating needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional coolers with one inlet and one outlet are used, then the structure is simple, but the temperature difference management of power batteries is poor
Solution Approach 1:
The cooler is divided into multiple independent flow channels (first flow channel, second flow channel, third flow channel) with separate inlets and outlets. Each channel can be independently controlled to regulate refrigerant flow distribution, enabling precise temperature management of different battery regions while maintaining overall system efficiency.
2Ease of operation
If the flow rate of the cooler is regulated, then the cooling capacity is adjusted, but the heat transfer efficiency of the entire contact area is affected
Solution Approach 1:
Different flow channels are equipped with independent flow rate regulating valves, allowing local adjustment of refrigerant flow to match the specific heat dissipation needs of different battery regions. This enables precise control of cooling capacity in high-heat areas without unnecessarily reducing flow in lower-heat areas, maintaining overall heat transfer efficiency.
3Quantity of substance
If power batteries with high energy density and large volume are used, then the energy storage capacity is improved, but the heat generation in different areas becomes uneven
Solution Approach 1:
The cooling system is segmented into multiple flow channels that correspond to different regions of the large-volume, high-energy-density battery pack. This segmentation allows independent thermal management of each region, addressing the uneven heat generation characteristic of high-capacity batteries by providing targeted cooling where needed.
Solution Approach 2:
The multi-channel design with independent flow control enables local quality adjustment of cooling intensity. High-heat generation areas receive higher refrigerant flow rates while low-heat areas receive reduced flow, optimizing temperature uniformity across the entire battery pack without compromising the benefits of high energy density and large volume.
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 improves temperature uniformity across the battery, extends its service life, and reduces energy waste by precisely controlling cooling/heating capacities in different areas.
Implementation Method 1
traditional power battery pack stamping and brazing coolers exchange heat with the power battery through the characteristic of refrigerant evaporation and heat absorption
Implementation Method 2
Each heat exchange channel forms a heat exchange unit at the direct cooling plate, and the heat exchange unit is configured to performing heat exchange in different temperature regions of a battery
Data Source
AI summary
A direct cooling plate, a heat exchanger, a power battery pack and a vehicle are disclosed. The direct cooling plate includes a plurality of heat exchange channels, which are arranged inside the direct cooling plate. Each heat exchange channel includes an inlet for a refrigerant and an outlet for the refrigerant to flow out therefrom. The at least one heat exchange channel is circumferentially arranged around the other heat exchange channels; and each heat exchange channel forms a heat exchange unit at the direct cooling plate, and the heat exchange unit is used for performing heat exchange in different temperature regions of a battery. The direct cooling plate can control the temperature of the refrigerant at the inlet of each heat exchange channel aimed at different temperature regions of the battery, such that the overall temperature difference of the battery is improved, and prolonging the service life of the battery.