Integrated Battery Cooling Plate with Auxiliary Flow Channels
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Solution Overview
Problem
The existing liquid cooling systems for battery packs suffer from poor temperature consistency among battery cells due to significant temperature differences between the liquid at the inlet and outlet ports of the liquid cooling plate, leading to reduced service life and performance.
Innovation Solution
A liquid cooling plate design featuring a main liquid cooling flow channel and an auxiliary liquid cooling flow channel, where one end of both channels communicates with the liquid inlet port, and the auxiliary channel's end communicates with the latter half of the main channel, enhancing heat exchange and temperature consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a U-shaped liquid cooling flow channel is used in the liquid cooling plate, then the structure is simple and easy to manufacture, but the temperature consistency among battery cells is poor due to significant temperature difference between inlet and outlet liquid
Solution Approach 1:
The liquid cooling flow channel is divided into a main flow channel and multiple auxiliary flow channels. The main flow channel extends from the liquid inlet port to the liquid outlet port, while auxiliary flow channels are distributed across different regions and communicate with the main channel at different positions. This segmentation allows coolant to be distributed to multiple regions simultaneously, reducing temperature differences and improving temperature consistency among battery cells.
2Loss of energy
If coolant flows directly from inlet to outlet through a single channel, then the flow path is short and pressure loss is reduced, but heat exchange effect with battery cells is insufficient
Solution Approach 1:
Auxiliary flow channels are positioned to communicate with the main flow channel at strategically selected locations along the flow path. This allows the coolant to perform preliminary cooling in early regions before continuing through the main channel, maximizing heat exchange efficiency without significantly increasing pressure loss or extending the overall flow path.
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 cooperative design of the main and auxiliary liquid cooling flow channels improves the heat exchange effect between the coolant and battery cells, thereby enhancing temperature consistency among the battery cells and alleviating the issue of reduced service life.
Implementation Method 1
heat generated by the battery cells is carried away through convective heat exchange between liquids, so that the temperature of the battery cells is reduced
Implementation Method 2
A main liquid cooling flow channel and an auxiliary liquid cooling flow channel are formed in the liquid cooling plate... the heat exchange effect between the coolant and the battery cells is improved
Data Source
AI summary
A liquid cooling plate, a battery pack and a lower case therefor, and an energy storage system are provided. A plurality of main liquid cooling flow channels and auxiliary liquid cooling flow channels are arranged in a liquid cooling plate of a lower case for a battery pack. An integrated design of the liquid cooling plate and the lower case for the battery pack is realized without the need for installing a separate liquid cooling plate, so that the space utilization rate and energy density of the battery pack is improved. Moreover, the auxiliary liquid cooling flow channels cooperates with the main liquid cooling flow channels, the heat exchange effect between the coolant and the battery cell is improved, and the temperature consistency among the battery cells is enhanced. Therefore, the technical problem of poor temperature consistency among the battery cells is alleviated.