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Device for monitoring changes of internal temperature and pressure of large lithium ion battery in thermal runaway occurrence and development processes

A lithium-ion battery, internal temperature technology, used in electrochemical generators, battery pack parts, secondary batteries, etc. Effect

Pending Publication Date: 2017-11-10
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the temperature cannot be controlled in time, it will cause thermal runaway of the battery
This kind of safety risk cannot be tolerated for electric vehicles and energy storage power stations loaded with a large number of lithium-ion battery cells.

Method used

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  • Device for monitoring changes of internal temperature and pressure of large lithium ion battery in thermal runaway occurrence and development processes

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0015] figure 1 It is a schematic diagram of a device for monitoring internal temperature and pressure changes during the occurrence and development of thermal runaway of a large lithium-ion battery according to the present invention.

[0016] The present invention is mainly divided into two parts. In the first part, the battery shell cover plate 2 is clamped between the nut 1 and the fastening nut cover 4, and the thermocouple fixing structural member 3 is screwed up and down, and the cover plate is clamped. . In order to prevent the electrolyte inside the battery from overflowing from the gap between the thermocouple 5, the thermocouple fixing structure 3 and the fastening nut cover 4, it is necessary to close the gap between the thermocouple fixing structure 3 and the fastening nut cover 4 during installation. The hollow copper ball 6 is extruded and def...

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Abstract

The invention discloses a device for monitoring changes of internal temperature and pressure of a large lithium ion battery in thermal runaway occurrence and development processes. The device comprises a battery casing, a thermocouple, a connecting structure body and a pressure sensor. The device specifically comprises a nut (1), a battery casing cover plate (2), a thermocouple fixing structural member (3), a fastening nut cover (4), the thermocouple (5), a hollow copper ball (6), a pressure sensor fixing structural member (7), a threaded plug (8), an electrode material (9), a nut (10) and the pressure sensor (11). The test design is mainly aimed at power and energy-storage equipment requiring large lithium ion batteries and the like. The thermocouple and the high-temperature environment pressure sensor are mainly used for detecting temperature and pressure change in the battery and contribute to monitoring of changes of internal temperature and pressure of the battery in the safety design process of the lithium ion battery.

Description

technical field [0001] The invention relates to the technical field of research and development of high-safety lithium-ion batteries, in particular to a device for monitoring changes in internal temperature and pressure during the occurrence and development of thermal runaway of large-scale lithium-ion batteries. Background technique [0002] With the improvement of people's living requirements, lithium-ion batteries need faster charge and discharge rates and larger capacities in large-scale applications. The increase of these factors will greatly affect the safety of the battery itself. For example, the battery will generate a lot of heat during the charging and discharging cycle, coupled with the effects of limited space and time accumulation, it is easy to cause the temperature of the single battery to rise. When the normal operating temperature range of the battery is exceeded, the internal materials of the single battery will be damaged break down, increasing the press...

Claims

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Application Information

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IPC IPC(8): H01M10/48H01M2/36H01M50/636
CPCH01M10/48H01M10/486H01M50/636Y02E60/10
Inventor 王青松黄沛丰彭文毛斌斌陈昊东孙金华
Owner UNIV OF SCI & TECH OF CHINA
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