Immersion-Cooled Battery Wireless Communication Sealing
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Solution Overview
Problem
Immersion-cooled batteries for electric vehicles face challenges in maintaining sealing integrity due to wired connections between the battery management system (BMS) and the data bus, leading to potential fluid leakage and interference issues with wireless communication protocols.
Innovation Solution
A wireless communication system is integrated into the battery, comprising internal and external units that communicate through a porthole permeable to specific wavelengths, allowing for reliable signal transmission without compromising the module's sealing, using optical or radio waves and compatible with protocols like CAN, SPI, and Ethernet, ensuring seamless integration with the data bus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired connection is used between BMS and data bus, then communication reliability is improved, but sealing integrity deteriorates due to fluid leakage through connectors
Solution Approach 1:
The patent replaces the mechanical wired connection system with an optical communication system. The BMS communicates with the external data bus through optical signals transmitted via a cable that passes through the cabinet wall, eliminating the need for electrical connectors that compromise sealing. The cable is equipped with a cable grommet for sealed passage through the cabinet wall.
Solution Approach 2:
The patent introduces an intermediary optical cable with cable grommet as a mediator between the BMS inside the cabinet and the data bus outside. This intermediary enables communication while maintaining the sealing integrity of the cabinet wall, as the cable grommet provides a sealed passage for the cable.
2Object-affected harmful factors
If wireless communication is used between BMS and data bus, then sealing integrity is improved, but communication protocol compatibility deteriorates due to interference with wired protocol requirements
Solution Approach 1:
The patent substitutes wireless communication with an optical communication system that uses light signals transmitted through a cable. This optical cable connection maintains sealing integrity while enabling communication that is compatible with wired protocols like CAN, as the optical signals can be converted to electrical signals at the external end.
3Object-affected harmful factors
If cable grommet is used to seal cable passage, then sealing is improved, but reliability deteriorates due to fluid insertion into cable at wire ends
Solution Approach 1:
The patent extracts the sealing problem from the cable connection system by using an optical cable with cable grommet that seals the passage through the cabinet wall. The sealing is applied at the cabinet wall outlet rather than at the internal wire connections, isolating the internal wiring from fluid exposure.
4Object-affected harmful factors
If optical communication is used through porthole, then sealing is maintained, but transmission reliability deteriorates due to signal interference from surrounding materials
Solution Approach 1:
The patent uses an optical cable with cable grommet as an intermediary transmission medium. The cable provides a protected pathway for optical signals from the BMS through the cabinet wall to the external data bus, shielding the signals from interference by surrounding materials while maintaining sealing integrity.
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 enables stable and interference-free communication between the BMS and the data bus, maintaining the battery's sealing integrity and facilitating efficient thermal management, while allowing for high-speed data transmission without modifying the communication protocol's hardware or low physical layers.
Implementation Method 1
said porthole is permeable to at least part of the waves of the visible spectrum, of the infrared spectrum and/or of the very high frequency band
Implementation Method 2
immersing the electrochemical cells of the battery modules in a fluid to allow rapid evacuation of calories
Implementation Method 3
the box can be filled with a fluid either in the liquid phase, or in the gaseous phase, or two-phase
Data Source
Figure 1~2
Figure 3~4
AI summary
The present invention relates to an immersion-cooled battery comprising at least one module provided with a wireless communication system as an interface between a battery management system "BMS" and a data bus outside the module, and enabling the sealing of said module.More particularly, the invention relates to an immersion-cooled battery, comprising at least one module (10) having a case (1) filled with a cooling fluid (9) in which electrochemical cells (8) are immersed and a battery management system "BMS" (2), characterized in that: - said battery has a wireless communication system connected to said battery management system BMS (2), and comprising radio or optical wave transmission and reception components, and in that - the wireless communication system has an internal unit (4) and an external unit (6) located respectively inside and outside said case (1), said internal (4) and external (6) units communicating through on/off signals propagating through at least one window (5) integrated into a wall of the case (1).