Li-ion battery dangers diminished by VOC sensors


Li-ion is the principal battery chemistry utilized in EVs, for instance.

Photoionisation detection (PID) sensors are capable of detect potential issues earlier than they happen within the manufacture and use of lithium-ion (Li-ion) batteries, and the large number of gadgets that use rechargeable batteries.

The protected utilisation of Li-ion batteries is a key concern for the builders of kit reminiscent of electrical automobiles, e-bikes, cell phones and laptops. The dangers posed by Li-ion batteries have been highlighted by plenty of high-profile incidents. In 2006 and 2007, for instance, hundreds of thousands of laptops and cell phones have been recalled attributable to security fears regarding their Li-ion batteries, and in 2013, a Boeing 787 was grounded following electrical points with the Li-ion battery within the plane’s auxiliary energy unit.

Famously, in 2016, round 2.5 million cell phones needed to be recalled after complaints of overheating and exploding batteries. Intensive investigations revealed inadequate insulation materials throughout the batteries and a design that didn’t present ample area to soundly accommodate the batteries’ electrodes, leading to thermal runaway, which happens when temperatures are raised by thermal or mechanical failure, quick circuiting, or electrical abuse. In newer information, there was a 60% improve in e-bike fires in London in 2023 in comparison with 2022, and this quantity will proceed to rise. Because of the magnitude of this drawback, and the worldwide publicity which ensues, demand is rising for sensing expertise that may detect defective Li-ion batteries, throughout each manufacturing and operation.

The primary security hazards related to failing Li-ion batteries are the ignition of the battery cell and/or the emissions of poisonous gases. These gases embody risky natural compounds (VOCs), that means delicate VOC sensors can be utilized to test the situation of those batteries – both inside transportable detectors or in course of/plant monitoring gear.

The anode in rechargeable Li-ion batteries is often graphite, the cathode is a metallic ox-ide, and the electrolyte is normally a lithium salt in a (flammable) natural solvent. This elec-trolyte contains compounds reminiscent of ethyl methyl carbonate (EMC) which is thought to be among the many gases emitted by a defective Li-ion battery. Conveniently, EMC will be detected by ION Science’s PID, so the builders of monitoring techniques and gear are capable of design applied sciences that utilise ION’s MiniPID sensors.

The Response Components for VOCs generally utilized in Li-ion battery electrolytes are pre-sented in Desk 1: Analysis of chemical compounds utilized in lithium-ion batteries.

Desk 1: Response elements for VOCs generally utilized in Li-ion batteries.

Resulting from their specificity, PID sensors are probably the most generally employed expertise for the detection of VOCs, and ION’s MiniPID vary contains probably the most delicate PID sensor on the planet, which makes it preferrred for the detection of hint leaks from defective Li-ion batteries.

Summarising, Peter Morris from ION Science says: “Potential prospects for our PID sensors in Li-ion battery purposes embody the builders of transportable devices, in addition to the designers of monitoring techniques for processes inside battery manufacturing, in addition to within the manufacture of EVs, e-bikes, laptops, tablets, telephones and plenty of others.”
(phrases: ION Science)

Nedjalkov, Al. Poisonous Gasoline Emissions from Broken Lithium Ion Batteries—Evaluation and Security Enhancement Answer. Batteries 20162, 5.


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