One of the critical focus areas for EV battery production is the manufacturing environment conditions. From initial raw materials to cell assembly the manufacturing conditions must be tightly controlled. This creates challenges for equipment manufacturers and operators alike. There are 3 main areas of critical consideration:
We understand these crucial requirements and have tested our equipment in dry rooms and dry test chambers. Our product designs have been adapted to eliminate potential premature wear items such as belts and pulleys, and replace them with direct drive motors. Drawing from our expertise and core competencies, Meech offers a tailored range of solutions to remove static charges and contamination, in order to deliver a zero faults forward approach at each application stage.
Lithium metal is extremely sensitive to even the smallest amounts of moisture in air and temperature inconsistencies in production.
The slightest exposure leads to reduced performance and impacts on reduced product life of Lithium-ion batteries.
Room temperature should be maintained at recommended levels, around 25°C (77°F), with tolerance of +/(-) 2°C (36°F) along with low dew points in the range of <1%.
The air change rate in the production room should be 20 to 50 air changes per hour while maintaining minimum fresh air introduction for positive room pressure and essential ventilation for operators.
- Contamination of any type into the battery materials or wound into the cell can lead to direct or soft electrical shortages – leading to end of line rejects or low battery range performance.
- ISO 8 cleanroom condition (or higher) is likely with major focus on contamination removal in the environment as well as on personnel.
Of course, contamination cannot always be removed and so there is still a risk of contamination and an impact on production yields.
Problems and free particles can also be created within the processes of unwinding/winding, changeovers, coating, calendaring, slitting, stamping, laser cutting and more.
All of these have potential to find their way into the anode/cathode/separator film layers.
Some contamination will be dry, free, unbound particles, while others will be moist, or bound contamination which is more difficult to remove.
Another risk area is toxic contamination from the coating materials as they are transferred over rollers, cut, wound and rolled – this can dissipate into the air and become a breathing hazard for the operator.
Static charges within the manufacturing environment can lead to a number of problems:
EV battery components are very sensitive to static charges – components must be uncharged within the process.
Uncontrolled static charges will also affect the material flow and will cause material misbehaviour or failure.
If uncontrolled, static discharges (sparks) will create surface dendritic burns affecting the dielectric properties of the separator film – leading to inconsistent charge and discharge behaviours and product failure.
Static charges generated on insulative materials such as the separator film also attract particles adding to contamination risk problems.
Az akkumulátorgyártási folyamat során számos olyan szakaszt azonosítottunk, amelyek hajlamosak a gyártósoron a szennyeződésre. A megfelelő megoldások alkalmazásával ezeken a pontokon gondoskodik arról, hogy ne legyenek gyenge láncszemek a termelési láncban. Az alábbiakban ezeket vizsgáljuk, és bemutatjuk megoldásainkat…
Prior to the coating stage of the copper/aluminium web, we recommend the use of a web cleaner on the substrate to remove any surface contamination that may impact the thickness and quality of the coated web. By removing the contamination at this stage, it ensure no unwanted particles are trapped within the layers, affecting the battery performance down the line.
To avoid the imprinting of any contamination from the roller itself to the substrate coating we suggest the use of either our CyClean-R which is ideal for use on a roller, or our contact RoClean. This will effectively clean the roller of any contamination to ensure there is no transmission to the web.
During this stage, the web and coating layers are compressed together to the correct thickness, activating the coating on the web itself. Cleaning the web prior to this critical stage prevents contamination being trapped between the layers themselves.
The slitting process can cause a lot of debris which can contaminate the coated web substrate. The use of a web cleaner at this stage ensures that the particles are removed from the surface of the web and filtered away from the operating atmosphere to avoid re-contamination. With such a high risk of contamination at this stage, cleaning is imperative to avoid the risk of future electrical shortages and expensive rejects.
Similar to the post-slitting stage, during electrode cutting, particles and debris can contaminate the web. In order to avoid this, web cleaning at this stage will clean the surface of the substrate, leading to clean and clear separation layers.
At the winding process we suggest a number of solutions for the best results. Prior to winding, surface cleaning of the substrate is recommended to not trap contamination within the battery film wind. To overcome static issues, which can be both dangerous and extremely detrimental to the battery performance, effective static control should also be introduced. This will neutralise any static charges caused by the winding process.
With a range of specially designed contact and non-contact web cleaners available, Meech can deliver solutions for anode/cathode/separator film cleaning, for different web widths, tensions, locations and materials.
For more challenging ‘bonded’ contamination we offer a new battery cleaning range of brush surface type cleaners – with materials specially adapted for dry room applications.
High performance DC ionisation bars are specified where frequency, voltage and polarity can all be fine-tuned to suit material, distance and residual charge. These include EX versions in case of flammable environments.
To safeguard operation and log performance these are often supplied with industry 4.0 SMART control – to program bar performance instantly, and record and monitor performance in real time.
A portalanítás és sztatikus felületvédelem kiemelt fontosságú területek a műanyag és nyomda iparban egyaránt. A MEECH cég által kinált ionizációs levegő függőnyök, vagy akár mobil ionizáló pisztolyok, ionizátorok kiemelkedő teljesítménnyel biztosítják az Ön számára is a maximális hatékonyságot és selejtszám csökkenést!
Budapest, Gábor László utca 2 térkép
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