Battery Pack Bracket With Immersion Cooling and Simplified Sealing
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Solution Overview
Problem
Battery packs generate significant heat during charging and discharging, which affects the stability of the cells if not adequately dissipated.
Innovation Solution
A battery pack design incorporating an accommodation cavity filled with immersion liquid, where the electrode column of the cell is immersed, allowing heat transfer to the liquid for dissipation through a bracket, with a simple structure that isolates the cavity from the external space and uses a sealant to surround the opening, and a transparent bracket for ease of application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the electrode column is immersed in liquid for heat dissipation, then heat dissipation efficiency is improved, but the sealing complexity increases
Solution Approach 1:
The electrode column penetrates through the bracket while the sealing ring is nested around the opening. The sealing ring is positioned such that it surrounds the electrode column at the penetration point, creating a nested configuration where the sealing element is integrated into the bracket structure rather than being a separate complex assembly.
Solution Approach 2:
A sealing ring made of flexible material is used to seal the opening where the electrode column penetrates. The sealing ring can be a thin film or ring structure that flexes to accommodate the electrode column while maintaining the seal, simplifying the sealing structure compared to rigid multi-component sealing systems.
2Temperature
If the cell body is connected to the bracket to transfer heat, then heat dissipation is improved, but the structural complexity increases
Solution Approach 1:
The bracket serves multiple functions simultaneously: it provides structural support for the cell, acts as a mounting structure, and functions as a heat dissipation component. The cell body is directly connected to the bracket, merging the support and heat transfer functions into a single integrated structure rather than requiring separate support and heat sink components.
Solution Approach 2:
The bracket is designed as a multi-functional component that performs mechanical support, positioning, and thermal management functions. By making the bracket universal in its functions, the overall structure is simplified as fewer separate components are needed to achieve the same goals.
3Reliability
If the opening is sealed with sealant, then sealing reliability is improved, but the manufacturing complexity increases
Solution Approach 1:
The sealing ring is designed to automatically seal the opening when the electrode column is inserted and positioned. The elastic or flexible nature of the sealing ring allows it to deform and create a seal without requiring additional sealing operations or materials, making the sealing process self-executing during assembly.
Solution Approach 2:
The sealing ring acts as an intermediary element between the bracket opening and the electrode column. It mediates the connection by providing a sealing interface that accommodates slight misalignments or surface irregularities, ensuring reliable sealing while simplifying the manufacturing requirements compared to precision-machined sealed joints.
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 immersion liquid effectively absorbs and transfers heat from the electrode column to the bracket, enhancing heat dissipation and maintaining cell stability with a simple, efficient design.
Implementation Method 1
the electrode column extending through the opening and being immersed in the immersion liquid... to transfer heat to the immersion liquid through the bracket
Implementation Method 2
a side surface of the body being in contact with the bracket to transfer heat to the immersion liquid through the bracket
Data Source
AI summary
A battery pack includes: a box; a bracket provided in the box, the bracket being provided with an accommodation cavity therein, immersion liquid being provided in the accommodation cavity, and a first side wall of the accommodation cavity being provided with an opening therethrough along a first direction; and a cell provided in the box, the cell comprising a body and an electrode column protruding from a top end of the body, the electrode column extending through the opening and being immersed in the immersion liquid, the top end of the body being connected to the first side wall and sealing the opening, and a side surface of the body being in contact with the bracket to transfer heat to the immersion liquid through the bracket.