Battery Pack Heat Exchanger Channels for Low Pressure Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery packs for electric vehicles face challenges in maintaining optimal temperature, leading to reduced performance and safety due to high weight and pressure loss in heat exchangers, which affects the range and efficiency of the vehicle.
Innovation Solution
A battery pack design with a heat exchanger flow channel configuration where the inlet and outlet are positioned above the flow section, with specific cross-sectional area ratios and shapes to minimize pressure loss and enhance heat transfer efficiency, including a U-shaped structure and trapezoidal chambers to guide the flow and prevent sludging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large amount of heat exchanger is injected into the heat exchange pipes to obtain sufficient heat exchange power, then the heat exchange efficiency is improved, but the weight of the vehicle increases
Solution Approach 1:
The patent changes the geometric parameters of the heat exchanger flow channel, specifically setting the horizontal cross-sectional area of the feeding chamber (A) and discharging chamber (C) to be 0.5 to 1.2 times the cross-sectional area of the heat exchanger inlet (B) and outlet (D) respectively. This parameter optimization allows for reduced heat exchanger quantity while maintaining heat exchange efficiency, thereby reducing vehicle weight.
2Loss of energy
If the heat exchanger flow channel is designed with larger cross-sectional areas to reduce pressure loss, then the heat exchange efficiency is improved, but the amount of heat exchanger material increases
Solution Approach 1:
The patent optimizes the cross-sectional area parameters of the flow channel, establishing specific proportional relationships between the feeding chamber area A and heat exchanger inlet area B (0.5A≤B≤1.2A), and between discharging chamber area C and heat exchanger outlet area D (0.5C≤D≤1.2C). This parameter optimization reduces pressure loss while controlling the quantity of heat exchanger material.
Solution Approach 2:
The patent positions the heat exchanger inlet and outlet above the flow section in the vertical dimension, creating feeding and discharging chambers that extend in the vertical direction. This dimensional arrangement allows for optimized flow paths that reduce pressure loss without requiring excessive horizontal cross-sectional areas, thus controlling material quantity.
3Ease of manufacture
If the heat exchanger inlet and outlet are positioned lower to facilitate installation, then the ease of manufacture is improved, but the risk of collision and leakage increases
Solution Approach 1:
The patent positions the heat exchanger inlet and outlet in the vertical dimension above the flow section, rather than at the lower ends. This vertical positioning arrangement reduces the risk of collision with objects below the housing and minimizes leakage risk, while the feeding and discharging chambers are designed to facilitate fluid flow from these elevated positions.
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 design reduces the weight and pressure loss of the heat exchanger, improving temperature regulation efficiency and reducing the risk of leakage, thereby enhancing the battery pack's performance and safety while minimizing the amount of heat exchanger material needed.
Implementation Method 1
heat exchange pipes are placed around the battery, and the heat exchanger in the heat exchange pipes is used to exchange heat with the battery, thus realizing the regulation of the battery temperature
Implementation Method 2
the heat exchanger flows in the feeding chamber and the discharging chamber in the up-down direction
Data Source
AI summary
A battery pack comprising housing and battery arranged on said housing, wherein heat-exchanger-flow-channel is provided for regulating the temperature of the battery, and said heat-exchanger-flow-channel comprises heat-exchanger-inlet, heat-exchanger-outlet, and at least one flow section connecting said heat-exchanger-inlet and said heat-exchanger-outlet; said heat-exchanger-inlet and said heat-exchanger-outlet are located higher than said flow section; said flow section is connected to said heat-exchanger-inlet through feeding chamber, and when the horizontal cross-sectional area of said feeding chamber at a position connected to said heat-exchanger-inlet is defined as A and the cross-sectional area of said heat-exchanger-inlet is defined as B, 0.5A≤B≤1.2A; and/or said flow section is connected to said heat-exchanger-outlet through a discharging chamber, and when the horizontal cross-sectional area of said discharging chamber at a position connected to said heat-exchanger-outlet is defined as C and the cross-sectional area of said heat-exchanger-outlet is defined as D, 0.5C≤D≤1.2C.