Battery Dry Rooms

Dry Room incorporating Patented Green DryPurge® (GDP) Technology

for low dew point dehumidifier requirement

Bry-Air, the leader in dehumidification…worldwide, with 60 years of experience in providing moisture control solutions for the most complex and critical industrial applications, helps support you with all your Solid-State and Next-Generation Lithium Technology Battery Dry Room requirements under a single roof.

Bry-Air has the capability to build state-of-the-art Dry Rooms and provide complete solution for achieving low dew point control for your hygroscopic and moisture sensitive material processing.

Bry-Air Dry Rooms are equipped with patented Environment Control Dehumidification System, including refrigeration system. Bry-Air has proven success in meeting the stringent requirement of dew point lower than (-) 75℃ and has recently provided dry room solution to one of the most advanced and reputed Indian Defence Laboratories, Defence Research and Development Organization (DRDO). Bry-Air also takes pride in being the fastest growing adsorption technology group in the world and having over 141 patents applications filed in 15 new technologies of which 74 have been granted/ allowed already.

Dry Rooms are being used by pharmaceutical companies, automotives and selective other industries which have very low dew point requirements for their hygroscopic material processing and storage. Today, Solid-State and Next-Generation Lithium Technology Battery Dry Rooms represent one of the fastest-growing applications due to stringent moisture control requirements. Lithium and alternative battery manufacturers are today the most vulnerable and hence, are driving the high requirement for Dry Rooms. Every Dry Room is unique and there is a great amount of detailing and specialization requirement. Only few players who have the desired experience and subject knowledge are able to get the design and configurations of such units correct in the first instance. Safety is paramount in Dry Rooms, as a minor glitch or error may lead to major hazardous risks.

Bry-Air Airgineers are well trained and equipped to deliver any size of Dry Rooms, be it for use in research laboratories or large scale production areas. Our Airgineers develop turnkey dry room solutions ensuring highest standards of safety and design competencies. Working closely with the clients directly, they are able to design, install and retrofit some of the most advanced dry rooms with fully automated systems.

Environment Control – Very Critical for Li-ion Battery Production and Battery Dry Rooms

• Li-ion battery production is undertaken in very critical and controlled (dry room) environment conditions
• Non maintenance of the desired RH during Li-ion cell manufacturing (< 1%) and battery assembling (< 10%) may lead to consequences such as:
  • Degradation in power storage characteristics of lithium
  • Reduced performance and battery life
  • Explosion in batteries in extreme cases

Key constituents and requirements for Dry Room built:

Constituents:

Panel & Room

• Insulated and fire retardant modular panels
• Air tight self supporting rooms with HEPA filters inside the room
• All metal construction
• Baked white galvanized metal interior (stainless steel option available) and exterior

Floor

• Anti static floor

Door

• Entrance door with air lock
• Emergency door

Sensor

• Controller, dew point meter with dew point sensor

Requirements

• Vapour tight construction ensuring zero leakages
• Rib structure fabricated from hollow tubular section welded together for providing chamber strength and rigidity with special emphasis for floor loading. However, of late, double skin modular panel construction with vapour tight construction have also gained acceptance with advance of new manufacturing processes
• Proper insulation of the duct work
• Inner/outer skin generally to be PPGI/SS/Powder coated constructed
• Proper lighting arrangement and power points at necessary locations
• Ante room to reduce moisture load due to door opening
• Power points to be provided at various places as required
• Air shower to limit dust ingress
• Special Entry Doors for the main entrance, ante/airlock room, and an additional emergency door is required for Air Shower room

Some Outstanding Features and Advantages of Bry-Air GDP Technology

• Highest low dew point supply air CMH/kW of regeneration: High Performance
• Single Rotor Machine: for as low as (-) 90°C
• High Performance Rotor: pH neutral, water washable
• Own Rotor Manufacturing and Quality Certifications
• Performance Demonstration (Type Test): each design can be pre validated in our dynamic test lab
• Unit Construction: robust, durable, >20 years life
• Adjustability of Fresh Air Fraction

• No Post Cooling Coil Required: feature of patented technology

Tailored exclusively for Li-ion Battery manufacturing
embedded with Patented   (GDP) Technology

If you are considering setting up a Dry Room, Bry-Air may help you get started.

Please get across to us at [email protected] and we will be happy to help you get to the driest room on earth.

Dry Rooms for Lithium Batteries

Don’t Let Moisture Reduce The Performance of Lithium Batteries

There are four critical legs on which the lithium battery production space stands on:

• Technology
• Raw Material
• Machinery
• Dry Rooms

Bry-Air has the product and global standard technology for dry rooms.

The Green DryPurge (GDP) dehumidifier technology which is the most energy efficient dehumidifier for <1% RH dry rooms is patent of Bry-Air (Asia).

Bry-Air has the capability to build state-of-the-art Dry Rooms, and provide complete solution for achieving low dew point control for your hygroscopic and moisture sensitive material processing.

Bry-Air is the only total solution provider for dry rooms with environment control equipment incorporating patented technology critical for Lithium battery manufacturing.

In manufacturing of Lithium batteries there is a requirement of very low humidity conditions – typically below 1% RH or lower (- 35°C or -80°C dew point).

Also pure Lithium metal is extremely sensitive to even tiny amounts of moisture in the air in the lithium batteries processing rooms. Moisture sealed inside the battery can react after the battery is completed. When moisture in the air comes in contact with lithium metal, an exothermic chemical reaction occurs that forms Lithium Hydroxide and Hydrogen Gas.

2Li   +    2H₂O     =     2LiOH     +      H₂

So, in order to overcome above problems, dry rooms are used.

Areas of Critical Moisture Control in Battery Production Facilities

• Battery Assembly Area
• Cover Attachment to Power Collector
• Glass to Metal Sealing
• Electrolyte filing in Cell
• Cathode Production
• Testing
• Electrodes Insertion

Ideal Dry Room Conditions for Li-ion Battery Manufacturing

• Moisture level in Lithium-ion battery processing areas should have less than (-) 35°C dew-point and/or moisture content of 0.14 grams per kg of dry air
• Room temperature should be maintained at recommended levels, around 25°C, with tolerance of +/(-) 2°C along with dewpoints in the range of (-) 35°C (0.14 g/kg)
• The air change rate in the production room should be more than 50 air changes per hour with maintenance of minimum fresh air introduction for positive room pressure and ventilation for workers

The Green DryPurge® Advantage …the Cutting Edge Technology

• Bry-Air’s GreenDryPurge® (GDP) patented technology for dehumidifiers ensures optimum performance of dehumidifiers, even at the ultra low dew point, up to (-) 90°C.
• Rotor made up of pH neutral and chemical resistant material. Inertness to gases such as Hydrogen Flouride (HF) generated during the production of Lithium-ion batteries

Green DryPurge® is covered by Patent Granted/Pending: USA, China, South Africa, India, South Korea, Japan, Canada, Mexico, Europe, Australia, Brazil.

Bry-Air…Your Dehumidification Partner

• Fully equipped, single point solution provider for Dry Room chambers with Environment Control Equipment (Dehumidification systems including Refrigeration unit)
• Proven success in meeting the stringent requirement of dew point lower than (-) 75°C, required by the most updated and largest lithium battery plant
• Highest dry process airflow in CMH/kW
• More than 100 units installed and commissioned

Bry-Air Advantage

• Proven success in meeting the stringent requirement of dew point lower then (-) 75° C, required by the most updated and largest lithium battery plant
• Highest dry process airflow in CMH/kW
• More than 100 units installed and commissioned across the world

Some of our Esteemed Customers:

• Schlumberger
• Mercedes
• BHEL
• BYD
• Wuhan Design Institute
• Beijing University
• Guizhou Mei Ling Li Batt
• Bamo Battery
• Amara Raja
• Vikram Sarabhai Space Centre
• Hindustan Petroleum Corporation Limited
• Indian Institute of Technology, Kharagpur
• Defence Research & Development Organisation

Installation of Dry Room at Naval Science & Technology Laboratory (NSTL)

Bry-Air installed state-of-art Dry Room, incorporating desiccant dehumidifier with patented technology, for lithium battery manufacturing at NSTL, Visakhapatnam for their underwater applications.

NSTL is located in the coastal area of  Visakhapatnam where high moisture level in ambient air interrupts the performance and quality standards of underwater systems. The NSTL laboratory uses lithium based raw material, which is highly reactive to moisture, and requires controlled humidity typically less than 1% RH (-45°C dew point).

Bry-Air, the single source provider, built a fully integrated dry room incorporating desiccant dehumidifier with patented DryPurge® technology. The dry rooms made with metal clad polyurethane foam, modular type construction within an existing RCC building, included complete ducting, electrical wiring, cable routing for the equipment, lighting, antistatic flooring, construction of airlock rooms, PLC controls for operating dry room, housing for the dehumidifiers etc., was designed and executed by Bry-Air.