Battery device capable of monitoring electrode stress change in real time, battery adopting battery device and application of battery device

A technology of stress change and real-time monitoring, which is applied in secondary batteries, electrochemical generators, and measurement of the properties and forces of piezoresistive materials. It can solve the problems of long distances in practical applications, complicated research methods, high costs and time problem, to achieve the effect of great practical significance, simple representation, and efficient representation

Active Publication Date: 2020-09-22
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the research work on battery electrode stress is mainly carried out by building an optical platform, using a multi-beam laser system and designing a miniature stress test cantilever. Characterization of stress evolution is far from practical application

Method used

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  • Battery device capable of monitoring electrode stress change in real time, battery adopting battery device and application of battery device
  • Battery device capable of monitoring electrode stress change in real time, battery adopting battery device and application of battery device
  • Battery device capable of monitoring electrode stress change in real time, battery adopting battery device and application of battery device

Examples

Experimental program
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Effect test

Embodiment 1

[0038] refer to figure 1 , a battery device that can monitor electrode stress changes in real time, comprising:

[0039]The metal casing 1 is composed of an upper metal casing and a lower metal casing. In this embodiment, the upper metal casing of the metal casing 1 is a positive electrode casing, and the lower metal casing is a negative electrode casing. The same can be done in reverse. The longitudinal inner wall of the upper metal shell has internal threads, and the longitudinal outer wall of the lower metal shell has external threads.

[0040] The hollow cylindrical insulating part 2 is composed of an upper insulating hollow cylinder and a lower insulating hollow cylinder. The longitudinal inner and outer walls of the upper insulating hollow cylinder are respectively provided with internal threads and external threads. The thread cooperates with the internal thread of the upper metal shell to realize the connection, and the internal thread cooperates with the external th...

Embodiment 2

[0050] The basic structure is as in Example 1, and its preparation process:

[0051] According to the process from bottom to top, place the metal gasket 7 flatly on the surface of the thin film pressure sensor 8, and then use a wire to connect the metal gasket and the negative electrode case. Put the negative pole piece 6 on the surface of the gasket, and the negative pole piece 6 is metal lithium foil, and then put the separator Celgard 2400 and the positive pole piece 4 in sequence (the lithium titanate slurry is coated on the aluminum foil current collector). Choose to dissolve 1mol / L Li PF 6 EC: DEC (volume ratio 1:1) mixed solution organic electrolyte, take an appropriate amount and add it between the electrode and the diaphragm. Afterwards, put the lower insulating hollow cylinder into the negative electrode case, insert the metal solid cylinder 3 into the lower insulating hollow cylinder, and press it on the positive pole piece 4 . Finally, screw the upper insulating ...

Embodiment 3

[0055] The basic structure is as in Example 1, and its preparation process:

[0056] According to the process from bottom to top, place the metal gasket 7 flatly on the surface of the thin film pressure sensor 8, and then use a wire to connect the metal gasket and the negative electrode case. Put the negative electrode sheet 6 on the surface of the gasket (the active negative electrode material silicon slurry is dispersed on the surface of the copper current collector), and then put the intermediate piece 5 (diaphragm Celgard2400) and the positive electrode sheet 4 (the lithium iron phosphate slurry is coated on the aluminum foil current collector). Choose to dissolve 1mol / L Li PF 6 EC: DEC (volume ratio 1:1) mixed solution organic electrolyte, take an appropriate amount and add it between the electrode and the diaphragm. Afterwards, put the lower insulating hollow cylinder into the negative electrode case, insert the metal solid cylinder 3 into the lower insulating hollow c...

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Abstract

The invention relates to a battery device capable of monitoring electrode stress change in real time. The battery device comprises a metal shell composed of an upper metal shell and a lower metal shell, a hollow cylindrical insulating part, a metal gasket and a film pressure sensor, wherein the hollow cylindrical insulating part is composed of an upper insulating hollow cylinder and a lower insulating hollow cylinder, a metal solid cylinder is arranged in the lower insulating hollow cylinder, serves as a conductive part for connecting positive and negative electrode passages, and compacts a battery assembly at the same time, the metal gasket is arranged below the battery assembly and forms a complete battery loop with the lower metal shell through an external lead, and the film pressure sensor is arranged below the metal gasket, is connected with an external data collector and is used for collecting electrode stress changes uniformly transmitted by the metal gasket. The invention further provides a battery adopting the device, the device can be used as a battery stress detection device, and the device can perform real-time and high-sensitivity monitoring and in-situ recording on the stress change generated by electrodes of various types of batteries in the charging and discharging processes under different conditions.

Description

technical field [0001] The invention belongs to the technical field of batteries and mechanics, and in particular relates to a battery device capable of real-time monitoring of electrode stress changes, a battery using the device and an application of the device. Background technique [0002] The unsustainability of traditional fossil energy and the environmental problems it brings have drawn attention to the development of clean new energy, which has become a research and investment hotspot in recent years. One of the core issues in the development of new energy is energy storage. Among the many energy storage methods, electrochemical energy storage occupies the core position and has been the most widely used and concerned. [0003] Among them, lithium, sodium, potassium, magnesium, aluminum, zinc plasma secondary batteries, all-solid-state batteries and gel batteries have been extensively studied, and have been applied to varying degrees in different fields. [0004] Howe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/48H01M10/0525G01L1/18
CPCG01L1/18H01M10/0525H01M10/48Y02E60/10
Inventor 汪长安梁芃
Owner TSINGHUA UNIV
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