Battery Cell Connector Cooling Structure for High-Current Packs
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Solution Overview
Problem
The increasing charging/discharging current in power batteries poses a challenge for heat dissipation in battery packs, leading to thermal runaway risks, while spatial constraints limit the size of aluminum bars used for high-voltage connections, compromising safety and spatial utilization.
Innovation Solution
A battery cell connecting structure that integrates an electrical connector with a cooler and an insulating heat dissipation medium, where the connector penetrates through a cavity and is immersed in the medium, enhancing heat dissipation capacity and preventing thermal runaway, while maintaining a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the flow area of the aluminum bar is increased to prevent excessive heat generation during charging/discharging, then the heat dissipation performance is improved, but the spatial utilization of the battery pack deteriorates
Solution Approach 1:
The patent combines the electrical connector (aluminum bar) with the cooler into an integrated structure. The electrical connector penetrates through the cooler, allowing the same component to serve both electrical connection and heat dissipation functions, thereby improving heat dissipation without occupying additional space
Solution Approach 2:
The electrical connector is designed to perform multiple functions: it serves as both the electrical conductor for high-voltage connection and as a heat dissipation element by penetrating through the cooler. This multi-functionality resolves the contradiction by making the electrical connector contribute to both electrical performance and thermal management
2Reliability
If the size of the aluminum bar is increased to handle large charging/discharging currents, then the safety performance is improved, but the device complexity increases
Solution Approach 1:
The electrical connector and cooler are merged into a single integrated structure, where the electrical connector penetrates through the cooler. This integration allows the same component to provide both electrical connection and active cooling, improving safety without requiring a larger aluminum bar
Solution Approach 2:
The cooler acts as an intermediary element that facilitates heat dissipation from the electrical connector. By introducing this intermediate cooling structure, the system can manage heat from large currents without increasing the size of the electrical connector itself
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 solution effectively increases heat dissipation capacity, reduces thermal runaway risks, and improves spatial utilization and assembly efficiency of battery packs without enlarging the aluminum bars, ensuring safety and performance.
Implementation Method 1
an insulating heat dissipation medium, arranged in the cavity, and configured to cool the electrical connector penetrated in the cavity
Data Source
AI summary
The disclosure relates to a battery cell connecting structure, a battery pack and a vehicle. The battery cell connecting structure is used for electrical connection of a plurality of battery cells, and includes: a cooler, arranged at one end of battery cell poles of the battery cells, and including a cavity and configuration holes in one-to-one correspondence with the battery cell pole; an electrical connector, for connection between the battery cell poles, where a partial region of the electrical connector penetrates through the cavity, a partial region of the electrical connector is exposed at the corresponding configuration hole and is configured to be electrically connected with the battery cell poles, and the electrical connector is connected with a circumference of the configuration holes in a sealed mode; and an insulating heat dissipation medium, arranged in the cavity, and configured to cool the electrical connector penetrated in the cavity.