Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Anti-explosion valve for power lithium ion battery

A lithium-ion battery and explosion-proof valve technology, applied in battery pack parts, circuits, electrical components, etc., can solve the problems of battery scrap, waste, and increased internal pressure of the battery, and achieve convenient installation, prevent explosion, and ensure normal use. Effect

Active Publication Date: 2014-08-27
奇瑞新能源汽车股份有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the process of realizing the present invention, the inventors found that the prior art has at least the following problems: the battery is discarded at the same time after the one-time explosion-proof valve is opened, which is an extremely good cycle performance compared to the new material lithium titanate of the lithium-ion power battery. big waste
Secondary degassing explosion-proof valve When abnormal conditions such as short circuit, overcharge, and overdischarge occur in the battery, the internal pressure of the battery rises sharply. This kind of explosion-proof valve cannot completely deflate instantly to achieve the purpose of explosion protection

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Anti-explosion valve for power lithium ion battery
  • Anti-explosion valve for power lithium ion battery
  • Anti-explosion valve for power lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] see figure 1 , a power lithium-ion battery explosion-proof valve with lithium titanate as the negative electrode, which includes an explosion-proof valve outer wire 6, an explosion-proof plate 4, a spring 2 and an explosion-proof valve inner wire 1, an explosion-proof plate 4, a spring 2 and an explosion-proof valve inner wire 1 It is installed in the outer wire 6 of the explosion-proof valve in sequence from bottom to top, and a through hole 8 is arranged in the middle of the inner wire 1 of the explosion-proof valve.

[0025] see figure 1 , in order to achieve a better sealing effect, inside the explosion-proof valve outer wire 6, an explosion-proof valve sealing ring 5 is provided below the explosion-proof disc 4, and a burs...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses an anti-explosion valve for a power lithium ion battery. The anti-explosion valve for the power lithium ion battery comprises an anti-explosion valve external thread, an anti-explosion valve internal thread, a spring and an anti-explosion piece are sequentially arranged inside the anti-explosion valve external thread from top to bottom, and a through hole is arranged in the middle of the anti-explosion valve internal thread. An anti-explosion piece washer is arranged inside the anti-explosion valve external thread and above the anti-explosion piece, and an anti-explosion valve sealing ring is arranged below the anti-explosion piece. The diameter of the spring is consistent with the outer diameter of the anti-explosion valve internal thread. A reducing port is arranged at the lower part of the anti-explosion valve external thread. An aluminium alloy foil is adopted as the anti-explosion piece which is 0.50-2mm thick. Nicks are arranged on the aluminium alloy foil. The anti-explosion valve for the battery has a simple structure, can be installed conveniently, prevents the overlarge internal pressure of the battery from bringing about influence on the safety property of the battery, and can timely release pressure to prevent explosion of the battery when the battery has short circuit, is overcharged, overdischarged or is under other abnormal situations.

Description

technical field [0001] The invention relates to an explosion-proof valve, in particular to an explosion-proof valve for a power lithium ion battery. Background technique [0002] Lithium titanate (Li4Ti5O12) is a "zero strain" electrode material with good cycle performance, good charge and discharge platform and high current charge and discharge performance, as well as good overcharge resistance, thermal stability and Safety performance, it is a new type of material for lithium-ion power batteries. [0003] Through the existing technology, the lithium titanate is used as the negative electrode of the power lithium ion battery. During the use of the battery, the lithium titanate reacts with the electrolyte to generate HF, CO2, CO and other gases, causing the internal pressure of the battery case to increase. The bigger it is, it may even explode, which brings great hidden danger to the safety of the battery. Therefore, it is necessary to install a battery explosion-proof va...

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
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/12
CPCY02E60/10
Inventor 王军张海滨
Owner 奇瑞新能源汽车股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products