Battery Pack Through-Hole Cooling for High-Rate Charge Discharge
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Solution Overview
Problem
Agricultural drones and electric tools experience high battery cell temperatures due to frequent charging and discharging, leading to safety hazards and inconvenient waiting times for batteries to cool down before recharging, with poor heat dissipation in existing battery packs.
Innovation Solution
A battery pack design featuring a first component with a through hole for external air communication, enhanced by tooth pieces for increased heat dissipation area and optional spacers for heat conduction, allowing for faster cooling and improved heat dissipation using external air draft devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the battery pack is charged and discharged at a high rate for multiple times, then the power output and usage frequency are improved, but the battery cell temperature increases and heat dissipation becomes insufficient
Solution Approach 1:
The battery pack is divided into multiple battery cells arranged in parallel, with each cell having independent heat dissipation capabilities through individual heat dissipation fins and air flow channels. This segmentation allows heat to be distributed and dissipated more efficiently across multiple smaller units rather than concentrating heat in a single large battery assembly.
Solution Approach 2:
Heat dissipation fins are introduced as intermediary structures between the battery cells and the external environment. These fins act as heat transfer mediators, conducting heat from the battery cells to the air flow, thereby improving heat dissipation efficiency without directly modifying the battery cells themselves.
2Device complexity
If the battery pack structure is simplified without heat dissipation components, then the device complexity is reduced, but the heat dissipation performance deteriorates
Solution Approach 1:
The heat dissipation fins are integrated with the existing battery pack housing structure, merging the heat dissipation function with the protective casing. This combination allows the housing to serve dual purposes: protecting the battery cells and facilitating heat dissipation, thereby reducing overall structural complexity while maintaining effective heat management.
Solution Approach 2:
The battery pack housing is designed to perform multiple functions simultaneously: mechanical protection of battery cells, structural support, and heat dissipation through integrated fins. This multi-functionality eliminates the need for separate heat dissipation components, reducing device complexity while maintaining effective heat management.
3Area of stationary object
If air flow channels are added to improve heat dissipation, then the heat dissipation area is increased, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
Instead of creating complex three-dimensional internal air flow channels within the battery pack, the design utilizes external two-dimensional air flow channels formed by the heat dissipation fins. This dimensional simplification allows air to flow over the external surface of the fins, providing effective heat dissipation while maintaining simple manufacturing processes.
Solution Approach 2:
The heat dissipation fins are designed as thin-walled structures that can be easily formed through standard manufacturing processes. These thin film-like fins provide large surface area for heat dissipation while maintaining structural integrity and ease of manufacturing, avoiding the need for complex thick-walled channel structures.
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 solution significantly reduces battery cell and circuit board temperatures, shortening cooling times and enhancing heat dissipation efficiency, making it safer and more convenient for continuous use and recharging.
Implementation Method 1
Heat generated by the circuit board and the tabs can be conducted to the first component, and the heat is discharged from the first component through the first through hole in the first component
Implementation Method 2
the first through hole communicates with external air... the first through hole can discharge heat inside the first component from the first component... external air draft device disposed at the first through hole of the first component to accelerate and improves heat dissipation
Data Source
AI summary
A battery pack includes an upper shell, a lower shell, a battery cell assembly, a circuit board and a first component. The lower shell is provided with a battery cavity, the battery cell assembly is disposed in the battery cavity, the circuit board is connected to the battery cell assembly, the circuit board is located between the upper shell and the lower shell, the first component is provided with a first through hole running through the first component, the first through hole is located between the circuit board and the battery cell assembly, and the first through hole communicates with external air.