Battery Wetting State Detection Using 3D Neutron Imaging
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Solution Overview
Problem
Current methods for detecting the wetting state of batteries are inefficient and inaccurate, particularly in ensuring adequate electrolyte distribution, which can lead to lithium precipitation and safety hazards due to inadequate wetting, and existing methods are either costly or destructive during production and testing.
Innovation Solution
A battery wetting state detection method using neutron imaging to obtain three-dimensional tomographic images, allowing for the determination of the wetting state by reacting with light elements like hydrogen and lithium, thereby identifying regions within the battery that are wetted by the electrolyte, and incorporating charge-discharge cycling to simulate actual use and detect potential safety issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional detection methods are used to check battery wetting state, then the detection can be performed, but the detection accuracy is low and may lead to missed safety hazards
Solution Approach 1:
The patent replaces traditional mechanical or electrical detection methods with neutron imaging technology. Neutrons interact with hydrogen atoms in the electrolyte to produce high-contrast images that clearly show wetting distribution, eliminating the inaccuracies of conventional methods and providing reliable safety hazard detection.
Solution Approach 2:
The patent introduces neutrons as an intermediary substance to detect the wetting state. Neutrons serve as a mediator that penetrates the battery structure and interacts specifically with hydrogen in the electrolyte, enabling accurate visualization of wetting distribution without direct contact or disruption to the battery system.
2Measurement precision
If destructive testing methods are used to verify wetting state, then the wetting state can be confirmed, but the battery is damaged and cannot be used again
Solution Approach 1:
The patent replaces destructive mechanical disassembly or chemical analysis with non-destructive neutron imaging. The neutron radiation passes through the battery without causing structural damage, allowing repeated testing of the same battery throughout its service life while maintaining accurate wetting state verification.
Solution Approach 2:
The patent creates a visual copy or image representation of the battery's internal wetting state through neutron imaging. Instead of physically disrupting the battery to examine its contents, the system produces detailed images that replicate the internal structure and electrolyte distribution, enabling verification without damage.
3Reliability
If advanced neutron imaging technology is used to detect battery wetting state, then detection accuracy and safety are improved, but the device complexity and cost increase
Solution Approach 1:
The patent extracts only the essential function of wetting state detection from the complex neutron imaging system. By focusing specifically on detecting hydrogen distribution in the electrolyte rather than imaging the entire battery structure in detail, the system reduces complexity while maintaining safety assurance through targeted measurement of the critical parameter.
4Measurement precision
If comprehensive three-dimensional imaging is performed on rotating batteries, then complete wetting distribution is captured, but the detection time and process complexity increase
Solution Approach 1:
The patent uses periodic rotation of the battery during neutron imaging to capture three-dimensional wetting distribution. By rotating the battery through defined angular positions and acquiring images at each position, the system builds a complete 3D map of electrolyte distribution. The periodic rotation enables comprehensive coverage while maintaining a systematic and efficient detection process.
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 method provides an accurate and non-destructive means to assess the wetting state of batteries, preventing lithium precipitation and ensuring safety by identifying unqualified wetting states early, thus enhancing battery performance and safety.
Implementation Method 1
neutrons without electricity can pass through an electron layer to react with light elements such as hydrogen (H) and lithium (Li), and all regions inside the battery that are wet by electrolyte react with neutrons, which makes it possible to implement the electrolyte wetting state distribution test through neutron imaging
Data Source
AI summary
This application provides a battery wetting state detection method and apparatus, a device, a system, and a medium and pertains to the field of battery technologies. The detection method may include: obtaining a three-dimensional tomographic image of a battery through neutron imaging; and determining a wetting state of the battery based on the three-dimensional tomographic image.