Immersion-Cooled Battery Pack Filtration for Metal Particle Isolation
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Solution Overview
Problem
Existing battery packs using immersion solutions for heat dissipation face insulation failure and short circuit risks due to metal particles in the cooling liquid.
Innovation Solution
A battery pack design with interconnected flow channels and filters at the connection ports to purify cooling liquid, blocking impurities and reducing their contact with battery cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a battery pack is designed to fit into a limited space with a specific outline shape, then the space utilization is improved, but the ability to accommodate different battery cell shapes and sizes is reduced
Solution Approach 1:
The battery pack is divided into multiple battery cell holders, each capable of independently accommodating different battery cell configurations. This segmentation allows the overall pack to maintain a consistent outline shape while adapting to various cell shapes and sizes through modular adjustments.
Solution Approach 2:
Different regions of the battery pack are designed with locally optimized structures to accommodate specific battery cell shapes and sizes. Each battery cell holder can be configured differently while maintaining the overall pack's outline shape, allowing local adaptation without compromising global space utilization.
2Reliability
If battery cells are tightly secured in battery cell holders to prevent movement, then connection reliability is improved, but the risk of damage during assembly and disassembly increases
Solution Approach 1:
The battery cell holders incorporate movable elements such as spring-loaded clips or adjustable retention mechanisms that can dynamically adapt to different battery cell configurations. These mechanisms provide sufficient securing force during operation but can be easily released during assembly and disassembly, balancing reliability with manufacturing ease.
Solution Approach 2:
Flexible buffer elements or damping materials are introduced as intermediaries between the battery cells and the securing mechanisms. These intermediaries reduce impact forces and stress concentrations during assembly and disassembly while maintaining secure connection during operation, thereby protecting battery cells from damage.
3Device complexity
If battery cells are arranged in a fixed configuration to simplify the battery pack structure, then device complexity is reduced, but the flexibility to optimize energy density is reduced
Solution Approach 1:
The battery pack structure is designed with universal battery cell holders that can accommodate multiple battery cell configurations through standardized interfaces and adjustable components. This multi-functionality allows the same structural framework to support different energy density optimizations without requiring complete redesign, maintaining low complexity while enabling energy density optimization.
Solution Approach 2:
The battery pack incorporates adjustable and reconfigurable elements that allow the battery cell arrangement to be dynamically optimized for different energy density requirements. These dynamic features are integrated into a modular framework that maintains overall structural simplicity while enabling configuration changes to maximize energy density.
Data Source
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AI summary
The present application discloses a battery pack, comprising a housing, a battery cell and cooling liquid, wherein the housing delimits an accommodating cavity, the housing has a side wall; the battery cell is arranged in the accommodating cavity; and the cooling liquid is contained in the accommodating cavity, wherein the battery cell is at least partially immersed in the cooling liquid; and wherein a first flow channel and a second flow channel are defined within the side wall, the first flow channel and the second flow channel are interconnected through a connection port, a filter is arranged at the connection port, and the filter allows the cooling liquid to pass through and blocks impurities; and the side wall is provided with a first opening and a second opening, the first opening is connected with the first flow channel, and the second opening is connected with the second flow channel, and the cooling liquid is configured to flow from the second flow channel to the first flow channel. By providing the first flow channel and the second flow channel within the side wall, wherein the connection port between the first channel and the second flow channel is provided with a filter, which can allows the cooling liquid to pass through and blocks impurities, it can reduce the content of impurities in the cooling liquid in the accommodating cavity, reduce the risk of impurities getting in contact with the battery cell, and thus improve the safety of use of the battery pack.