Battery Box Cooling Layout With External Parallel Flow Paths
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Solution Overview
Problem
Current battery box heat exchange systems are heavy, prone to liquid leakage, and have cumbersome maintenance, with non-uniform temperature distribution due to S-shaped or U-shaped heat exchange paths.
Innovation Solution
An integrated battery box design where the heat exchange flow path is external, formed by a first and second plate with recessed and protruding features, creating a main flow path and parallel branch paths for efficient heat exchange, reducing weight and manufacturing costs while preventing liquid leakage and ensuring uniform temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heat exchange tubes are provided inside the box body, then heat exchange function is achieved, but overall weight increases and liquid leakage risk increases
Solution Approach 1:
The patent merges the heat exchange function with the box body structure by integrating heat exchange channels directly into the plate structure. The first and second plates are equipped with heat exchange channels that communicate with the accommodating space, eliminating the need for separate heat exchange tubes inside the box body. This integration reduces overall weight while maintaining heat exchange functionality.
2Reliability
If heat exchange tubes are provided inside the box body, then heat exchange function is achieved, but liquid leakage risk increases
Solution Approach 1:
The patent extracts the heat exchange channels from the internal structure and relocates them to the plate surfaces. The heat exchange channels are formed on the first and second plates, which are positioned on opposite sides of the accommodating space. This external placement eliminates the liquid leakage risk associated with internal heat exchange tubes while preserving the heat exchange function.
3Reliability
If heat exchange tubes are used, then heat exchange function is achieved, but maintenance becomes cumbersome
Solution Approach 1:
The patent merges the heat exchange channels with the plate structure, making them an integral part of the box body. The channels are formed directly on the first and second plates through processes like injection molding or extrusion. This integration eliminates separate maintenance requirements for internal tubes, as the plates themselves serve as both structural and heat exchange components.
4Reliability
If S-shaped or U-shaped heat exchange paths are used, then heat exchange function is achieved, but temperature uniformity deteriorates
Solution Approach 1:
The patent segments the heat exchange path into multiple parallel channels on the first and second plates. Instead of a single S-shaped or U-shaped path, the heat exchange channels are divided into multiple parallel flow paths that distribute the heat exchange medium evenly across the accommodating space. This segmentation ensures uniform temperature distribution by preventing progressive heat absorption in a single long 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 integrated heat exchange system reduces overall weight and manufacturing costs, enhances safety by preventing liquid leakage, and achieves uniform and consistent temperatures within the battery box through a shorter, more efficient heat exchange path.
Implementation Method 1
The first plate includes a bottom wall and a peripheral wall that is connected to the peripheral edge of the bottom wall and extends upwards... the first concave portion is spaced apart from the bottom wall to form the first main flow path, the second main flow path, and the plurality of parallel branch flow paths
Implementation Method 2
a main flow path including a first main flow path, a second main flow path, and a plurality of parallel branch flow paths that communicate with both the first main flow path and the second main flow path
Data Source
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AI summary
The present invention provides a battery box, including a lower box body. The lower box body includes: a first plate including a bottom wall and a peripheral wall that is connected to the peripheral edge of the bottom wall and extending upwards, where the bottom wall and the peripheral wall together form an accommodating space that opens upwards along a height direction; and a second plate that is fastened under the bottom wall and that forms, together with the bottom wall, an inlet flow path, an outlet flow path, and a main flow path communicating with both the inlet flow path and the outlet flow path, where the main flow path includes a first main flow path, a second main flow path, and a plurality of parallel branch flow paths that communicate with both the first main flow path and the second main flow path. In the battery box of the present invention, the first plate and the second plate together form the lower box body and a heat exchange flow path. The box body and the heat exchange flow path are integrated together, thereby reducing an overall weight. In addition, the heat exchange flow path is provided externally, thereby effectively avoiding impact of liquid leakage from the heat exchange flow path on batteries inside the battery box. Furthermore, the main flow path formed by the first plate and the second plate allows a short heat exchange path and uniform heat exchange, thereby improving a heat exchange effect.