Experimental method for in-situ measurement of battery internal pressure
An experimental method and in-situ measurement technology, applied in the direction of measuring fluid pressure, measuring devices, instruments, etc.
Active Publication Date: 2020-07-14
TSINGHUA UNIV
View PDF13 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] Based on this, it is necessary to provide an experimental method for in-situ measurement of battery internal pressure in order to solve the problem of how to achieve in-situ measurement of battery pressure
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0077] In order to make the above objectives, features and advantages of the present application more obvious and understandable, the specific implementation of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are explained in order to fully understand this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of this application. Therefore, this application is not limited by the specific implementation disclosed below.
[0078] The serial numbers assigned to the parts herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequence or technical meaning. The terms "connection" and "connection" in this application, unless otherwise specified, include direct and indire...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention relates to an experiential method for measuring an internal pressure of a battery in situ. The experimental method is implemented as follows: a control device controls a triggerdevice to heat or charge the battery, so as to trigger thermal runaway of the battery; the control device controls a detection device to collect a first pressure value of a battery cavity and a secondpressure value of an air-tight cavity within set time; and the control device controls an inflation-deflation device according to the first pressure value and the second pressure value to inflate ordeflate the air-tight cavity, so that the second pressure value of the air-tight cavity is equal to the first pressure value of the battery cavity. Because internal and external pressures of the battery are balanced, a housing of the battery is located in an in-situ (the housing is not deformed) state. According to the experiential method for measuring the internal pressure of the battery in situ,the first pressure value measured by the detection device is an in-situ pressure value of the battery.
Description
Technical field [0001] This application relates to the field of battery technology, in particular to an experimental method for in-situ measurement of the internal pressure of the battery. Background technique [0002] The safety of lithium batteries has become one of the bottlenecks in the commercial application of lithium batteries, and the increasing number of electric vehicle fire accidents has increased people's anxiety about electric vehicles. Therefore, there is an urgent need to improve the safety performance of the battery. The in-depth study of the pressure change process during the thermal runaway process of lithium batteries reveals the establishment process of the opening pressure of the battery venting, which will help to understand the mechanism of the thermal runaway process of the battery. A deep understanding of the process mechanism of battery thermal runaway helps to select a suitable battery venting safety valve to open the pressure and improve the safety pe...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01L11/00
CPCG01L11/00G01L11/006
Inventor 王贺武张亚军李伟峰李成欧阳明高李建秋卢兰光杜玖玉韩雪冰冯旭宁
Owner TSINGHUA UNIV