Battery Pack Water Cooling Assembly With Reduced Coolant Pressure Loss
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Solution Overview
Problem
The cooling efficiency of existing battery pack cooling assemblies is low, leading to reduced charge/discharge efficiency and energy efficiency in devices such as vehicles.
Innovation Solution
A water cooling assembly with a body portion having a cooling channel and a second connecting portion with an inner cavity that gradually changes cross-sectional area, reducing pressure loss and enhancing cooling efficiency by modifying the flow rate and heat exchange rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional cooling assembly with uniform cross-section is used, then the structure is simple and easy to manufacture, but the pressure loss of coolant is high and cooling efficiency is low
Solution Approach 1:
The patent changes the geometric parameter of the inner cavity by making its cross-sectional area different from that of the communication cavity. Specifically, the inner cavity has a larger cross-sectional area than the communication cavity, which reduces the flow velocity and pressure loss of the coolant. This parameter change resolves the contradiction by improving cooling efficiency while maintaining manufacturability through a straightforward structural modification.
2Loss of energy
If the cross-sectional area of the inner cavity is made larger than the communication cavity, then the pressure loss is reduced and cooling efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent merges the inner cavity and communication cavity into a single integrated cooling assembly structure. The second connecting portion contains both cavities as unified components rather than separate parts, reducing the number of interfaces and assembly steps. This merging approach improves cooling efficiency through the cavity area difference while minimizing the increase in device complexity.
3Loss of energy
If a tapered inner cavity is used to reduce pressure loss, then cooling efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies that the inner cavity's cross-sectional area should be 1.1 to 2 times that of the communication cavity, providing a clear quantitative range for design and manufacturing. This parameter specification balances the need for pressure loss reduction with manufacturability, as the area ratio can be achieved through standard manufacturing tolerances without requiring excessive precision.
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 water cooling assembly increases the cooling efficiency of the battery pack, improving the charge/discharge efficiency and energy efficiency of devices by minimizing pressure loss and optimizing heat exchange.
Implementation Method 1
an end face of the inner cavity close to the cooling channel has a cross-sectional area greater than that of an end face of the communication cavity close to the inner cavity, so that the flow rate of the coolant entering the cooling channel can be reduced or the coolant can flow out of the cooling channel at a lower flow rate, that is, the pressure loss of the coolant at the second connecting portion is reduced
Implementation Method 2
a body portion having a cooling channel for receiving a coolant
Implementation Method 3
the water cooling assembly is configured to cool the cell
Data Source
AI summary
Embodiments of the present application relate to the technical field of batteries, and provide a water cooling assembly, a battery pack, and a device in order to solve the technical problem of low cooling efficiency of a cooling assembly of a battery pack. The water cooling assembly is configured to cool a cell, and includes: a body portion having a cooling channel for receiving a coolant; a first connecting portion connected to the body portion and having a communication cavity for introducing or draining the coolant; and a second connecting portion arranged between the body portion and the first connecting portion and having an inner cavity for communicating the cooling channel with the communication cavity. An end face of the inner cavity close to the cooling channel has a cross-sectional area greater than that of an end face of the communication cavity close to the inner cavity.