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Battery monitoring system and method

A technology of battery monitoring system and optical fiber, which is applied in secondary batteries, secondary battery repair/maintenance, circuits, etc., and can solve problems such as in-situ monitoring of dendrites and their growth processes that have not yet been realized

Active Publication Date: 2021-07-06
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in situ monitoring of dendrites and their growth processes has not yet been realized.

Method used

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  • Battery monitoring system and method
  • Battery monitoring system and method
  • Battery monitoring system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The monitoring system of this embodiment is suitable for battery in-situ monitoring, such as figure 1 As shown, the monitoring system of this embodiment includes a multi-wavelength light source 1, a wavelength division multiplexer 2, an optical fiber unit 3, a wavelength division multiplexer 4, a spectrum scanner 5, a data acquisition and analysis unit 6, an optical fiber Unit 3 includes m light guiding fibers arranged in parallel, where m is a positive integer.

[0042] This embodiment adopts the wavelength division multiplexing sensing system, and the optical path connection mode of the system is as follows: the output of the multi-wavelength light source 1 is connected to the input end of the wavelength division multiplexer 2, and the wavelength division multiplexer 2 decomposes and connects multiple wavelengths respectively Optical fiber 3 (F 1 ~F m ), optical fiber 3 (F 1 ~F m ) is made with discrete microstructures, the output of each optical fiber is connecte...

Embodiment 2

[0048] Such as figure 2 As shown, the monitoring system of this embodiment includes a first multi-wavelength light source 7, a first wavelength division multiplexer 8, a first optical fiber unit 9, a second wavelength division multiplexer 10, a first spectrum scanner 11, A second multi-wavelength light source 12 , a third wavelength division multiplexer 13 , a second optical fiber unit 14 , a fourth wavelength division multiplexer 15 , a second spectrum scanner 16 , and a data acquisition and analysis unit 17 . The first light guiding fiber unit 9 includes m light guiding fibers arranged in parallel in the horizontal direction, and the second light guiding fiber unit 14 includes n light guiding fibers arranged in parallel in the vertical direction, where m and n are positive integers.

[0049] The connection mode of the system optical path for sensing in this embodiment is as follows:

[0050] In the horizontal direction, the output terminal of the first multi-wavelength lig...

Embodiment 3

[0057] The system structure of this case includes a third multi-wavelength light source 18 , a first circulator 19 , a fifth wavelength division multiplexer 20 , a third optical fiber unit 21 , a third spectrum scanner 22 , and a data acquisition and analysis unit 23 . The third light guiding fiber unit includes m light guiding fibers arranged in parallel in the horizontal direction.

[0058] The specific implementation steps of this case for sensing are as follows:

[0059] The system optical path connection mode is as follows: the output of the third multi-wavelength light source 18 is connected to the first circulator 19a port, and the circulator 19b port is connected to the input end of the fifth wavelength division multiplexer 20, and the fifth wavelength division multiplexer 20 connects multiple The wavelengths are decomposed respectively to connect the optical fiber 21 (F 1 ~F m ), optical fiber 21 (F 1 ~F m ) is made with a discrete microstructure, the port of the ...

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Abstract

The invention discloses a battery monitoring system and method, and the system comprises a multi-wavelength light source, a wavelength division multiplexer, a light guide fiber unit, and a spectrum scanner, the multi-wavelength light source is used for providing a multi-wavelength detection light signal, and the spectrum scanner is used for receiving and processing a response light signal outputted by a light guide fiber; and a multi-wavelength detection light signal is injected into the light guide fiber unit through the wavelength division multiplexer, and a response light signal output by the light guide fiber unit is processed by the spectrum scanner. According to the invention, a micro-nano light guide fiber detection technology is introduced into the field of battery safety early warning, and in-situ monitoring of multiple parameters such as internal pressure, temperature, strain, dendritic crystal growth process and the like of the battery is realized.

Description

technical field [0001] The invention relates to the battery field, in particular to a battery monitoring system and a monitoring method. Background technique [0002] Lithium batteries are the main direction for the development of next-generation green new energy. Most of the existing commercial batteries are lithium-ion batteries. In order to obtain higher battery efficiency, lithium batteries are the preferred object of the next-generation batteries. However, lithium batteries are prone to grow dendrites after a large number of cycles or in extreme environments where the working environment is unstable. Once the dendrites pierce the separator, the battery will short-circuit and even cause the battery to explode, posing a greater safety hazard. . [0003] The separator is a key part inside the battery, located between the positive and negative electrodes of the battery. Its function is: on the one hand, it separates the materials of the positive and negative electrodes to ...

Claims

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Application Information

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IPC IPC(8): H01M10/42
CPCH01M10/4235Y02E60/10
Inventor 陈勐勐徐飞周林陈烨丁梓轩熊毅丰
Owner NANJING UNIV
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