Shiva Singh surya international Gurgaon

1. DEHUMIDIFIERS
BY SHIVA SINGH

2. INFRASTRUCTURE REQUIRED FOR THE
BATTERY
 DRY ROOM LAYOUT
 DEHUMIDIFIER
 CLEAN ROOM CLASS
 ISO standards for CRC
 MANUFACTURING PROCESS OVERVIEW
 FACILITY REQUIREMENTS
 OVERVIEW VIDEO OF THE DEHUMIDIFIERS
 BATTERY MANUFACTURING PROCESSES
 GENERAL PARAMETERS acquired & demanded by the manufacturers
 GIVEN TEST DATA FOR LI ION BATTERY MANUFACTURING BY DEHUMIDIFIER
MANUFACTURERS

3. DRY ROOM LAYOUT
Lithium battery production is highly sensitive to moisture and requires strictly controlled ultra-low humidity levels of < 1%
Relative Humidity in order to ensure process consistency and maximize quality, cycle life, storage capacity and production
yield. Most of the process steps are housed in specially designed dry rooms so temperature, humidity and particulate
concentrations can be precisely controlled. . desiccant dehumidifi cation systems can provide the moisture removal required
in order to maintain these dry rooms at -40 to -50°C dew point even with changing moisture loads and seasonal climate
variations. A typical system incorporates cooling, heating, chillers, and optimum energy recovery to minimize the customer’s
energy requirement

4. DEHUMIDIFIER WORKING DIAGRAM

5. CLIMATE CONTROL IN DRY ROOM
. is the world leader in humidity control with an extensive range of products and
services that help our customers achieve their performance and production goals.
Battery research and production requires strictly controlled ultra-low humidity levels
in order to ensure process consistency and maximize quality, cycle life, storage
capacity and production yield. .’ engineering expertise provides low dew point
solutions to meet the demanding performance requirements for battery dry rooms
with optimum energy recovery to reduce the customer’s energy requirement.
. Dehumidification Solution
All . dehumidifiers provide efficient and consistent humidity control regardless of the
ambient or outdoor conditions, ensuring consistent conditions for manufacturing all
year round using our patented Honeycombe®
Rotor Technology: two air streams pass simultaneously through two sectors of the
desiccant rotor. One air stream is dehumidified to the required humidity level.
The other air stream dries the rotor so it can adsorb moisture again and this
accumulated moisture is then exhausted to atmosphere. We deliver cost effective
solutions at the highest quality level, that are manufactured under strict control
regulations in our ISO 9001: 2015 and 14001 certified facilities. And our systems are
designed according to your requirements.

6. ROTOR DESIGN AND CONCEPT OF WORKING

7. DRY ROOM CHALLENGES & BENEFITS
Battery Manufacturing Challenges
• Achieving ultra-low dew point conditions (-30° to -55°C or -22° to -67°F dew point) in the dry room
• Maintaining consistent conditions through personnel changes
• Maintaining consistent conditions while equipment operates and heat loads fluctuate
• Maintaining consistent conditions through seasonal ambient conditions
• Ensuring stable positive pressure
• Minimizing equipment footprint and energy consumption
Benefits
• Maximizes operational flexibility by meeting performance 24/7, during all seasons, all production
modes, and varying numbers of personnel
• Precise control of humidity and temperature to ensure high quality, repeatable products
• Consistent low dew point improves cycle life, product yield and storage capacity.
• Special low dew point desiccant and purge design saves 30% on energy requirements and minimizes
operational costs
• Compact, energy-efficient system reduces footprint

8. . uses a variety of desiccants specially designed to meet low dew points for the battery industry. . green HPX rotors can
dehumidify in order to maintain dry rooms as low as -55°C (-67°F) dew point (0.013 g/kg moisture
Battery Processes Requiring Low Dew Point Conditions
• Slurry Mixing
• Electrode Coating/Drying
• Electrode Stamping/Punching
• Electrode Stacking/Winding
• Cell Assembly
• Laser Welding
• Vacuum Drying
• Electrolyte Filling
• Battery Sealing
• Aging and Formation

9. Improved Energy Recovery
. desiccant dehumidification systems are designed with innovative energy recovery to minimize
operating costs for the customer. A typical system for low dew point controlincorporates cooling,
heating, chillers, ducting and controls.The system uses an energy recovery purge design to recover
waste heat off the hottest section of the desiccant wheel (the dehumidification process produces
heat)and uses it to help with regeneration. This process reduces the reactivation heater power
required. The purge design creates a more energy efficient system with 30% reduction in energy
costs. Other options include night and weekend setbacks, variable flows, and waste heat recovery
off integrated DX cooling units. Each project is unique and has its own set of challenges. That is
why . experts work in close partnership with our customers to ensure the most optimum design for
each individual project. . solution provides the lowest energy consumption while meeting the
highest performance requirements for advanced battery manufacturing.
Reduced CO2 Footprint
Industrial manufacturing faces increased pressure for sustainable processes, reduced carbon
dioxide emissions and better use of clean energy. Reducing energy consumption related to air
dehumidification reduces overall fuel usage and exhaust emissions. The dehumidifier itself can use
heat from many sources, enabling clean energy use, and easily integrates with heat recovery
programs.

10. Organic Solvent Abatement
Although the main concern with lithium battery processing is ensuring ultra-dry,
low dew point atmospheres, a secondary concern is the treatment of organic
solvent exhaust from the coating and electrolyte filling processes. Based on the
same rotor technology, . offers our Zeol Rotor Concentrator system to treat
volatile organic compounds (VOCs) such as NMP (n-methyl-2-pyrrolidone). The
system concentrates a large exhaust volume containing a low concentration of
VOCs into a small concentrated stream using the same Honeycombe® media, but
with zeolite to adsorb the VOCs. The concentrated VOCs can be efficiently
recovered or cost-effectively destroyed in an integrated thermal oxidizer

12. Clean room class

13.  What is a Cleanroom?
Typically used in manufacturing or scientific research, a cleanroom is a controlled environment
that has a low level of pollutants such as dust, airborne microbes, aerosol particles, and chemical
vapors. To be exact, a cleanroom has a controlled level of contamination that is specified by the
number of particles per cubic meter at a specified particle size. The ambient air outside in a
typical city environment contains 35,000,000 particles per cubic meter, 0.5 micron and larger in
diameter, corresponding to an ISO 9 cleanroom which is at the lowest level of cleanroom
standards.
 Cleanroom Overview
Cleanrooms are used in practically every industry where small particles can adversely affect the
manufacturing process. They vary in size and complexity, and are used extensively in industries
such as semiconductor manufacturing, pharmaceuticals, biotech, medical device and life
sciences, as well as critical process manufacturing common in aerospace, optics, military and
Department of Energy.
A cleanroom is any given contained space where provisions are made to reduce particulate
contamination and control other environmental parameters such as temperature, humidity and
pressure. The key component is the High Efficiency Particulate Air (HEPA) filter that is used to
trap particles that are 0.3 micron and larger in size. All of the air delivered to a cleanroom passes
through HEPA filters, and in some cases where stringent cleanliness performance is necessary,
Ultra Low Particulate Air (ULPA) filters are used.
Personnel selected to work in cleanrooms undergo extensive training in contamination control
theory. They enter and exit the cleanroom through airlocks, air showers and/or gowning rooms,
and they must wear special clothing designed to trap contaminants that are naturally generated
by skin and the body.

14.  Depending on the room classification or function, personnel gowning may be
as limited as lab coats and hairnets, or as extensive as fully enveloped in
multiple layered bunny suits with self contained breathing apparatus.
 Cleanroom clothing is used to prevent substances from being released off the
wearer’s body and contaminating the environment. The cleanroom clothing
itself must not release particles or fibers to prevent contamination of the
environment by personnel. This type of personnel contamination can degrade
product performance in the semiconductor and pharmaceutical industries and
it can cause cross-infection between medical staff and patients in the
healthcare industry for example.
 Cleanroom garments include boots, shoes, aprons, beard covers, bouffant
caps, coveralls, face masks, frocks/lab coats, gowns, glove and finger cots,
hairnets, hoods, sleeves and shoe covers. The type of cleanroom garments
used should reflect the cleanroom and product specifications. Low-level
cleanrooms may only require special shoes having completely smooth soles
that do not track in dust or dirt. However, shoe bottoms must not create
slipping hazards since safety always takes precedence. A cleanroom suit is
usually required for entering a cleanroom. Class 10,000 cleanrooms may use
simple smocks, head covers, and booties. For Class 10 cleanrooms, careful
gown wearing procedures with a zipped cover all, boots, gloves and complete
respirator enclosure are required.

15.  Cleanroom Air Flow Principles
Cleanrooms maintain particulate-free air through the use of either HEPA or ULPA filters employing laminar or
turbulent air flow principles. Laminar, or unidirectional, air flow systems direct filtered air downward in a constant
stream. Laminar air flow systems are typically employed across 100% of the ceiling to maintain constant,
unidirectional flow. Laminar flow criteria is generally stated in portable work stations (LF hoods), and is mandated
in ISO-1 through ISO-4 classified cleanrooms.
Proper cleanroom design encompasses the entire air distribution system, including provisions for adequate,
downstream air returns. In vertical flow rooms, this means the use of low wall air returns around the perimeter of
the zone. In horizontal flow applications, it requires the use of air returns at the downstream boundary of the
process. The use of ceiling mounted air returns is contradictory to proper cleanroom system design.
 Cleanroom Classifications
Cleanrooms are classified by how clean the air is. In Federal Standard 209 (A to D) of the USA, the number of
particles equal to and greater than 0.5mm is measured in one cubic foot of air, and this count is used to classify the
cleanroom. This metric nomenclature is also accepted in the most recent 209E version of the Standard. Federal
Standard 209E is used domestically. The newer standard is TC 209 from the International Standards Organization.
Both standards classify a cleanroom by the number of particles found in the laboratory's air. The cleanroom
classification standards FS 209E and ISO 14644-1 require specific particle count measurements and calculations to
classify the cleanliness level of a cleanroom or clean area. In the UK, British Standard 5295 is used to classify
cleanrooms. This standard is about to be superseded by BS EN ISO 14644-1.
Cleanrooms are classified according to the number and size of particles permitted per volume of air. Large numbers
like "class 100" or "class 1000" refer to FED_STD-209E, and denote the number of particles of size 0.5 mm or larger
permitted per cubic foot of air. The standard also allows interpolation, so it is possible to describe e.g. "class 2000."
Small numbers refer to ISO 14644-1 standards, which specify the decimal logarithm of the number of particles 0.1
µm or larger permitted per cubic metre of air. So, for example, an ISO class 5 cleanroom has at most 105 = 100,000
particles per m³.
Both FS 209E and ISO 14644-1 assume log-log relationships between particle size and particle concentration. For
that reason, there is no such thing as zero particle concentration. Ordinary room air is approximately class
1,000,000 or ISO 9.

16. ISO standards for CRC
( BLUE & RED FOR LI ION BATTERIES )
Class
maximum particles/m3
FED STD
209E
equivalent>=0.1 µm >=0.2 µm >=0.3 µm >=0.5 µm >=1 µm >=5 µm
ISO 1 10 2
ISO 2 100 24 10 4
ISO 3 1,000 237 102 35 8 Class 1
ISO 4 10,000 2,370 1,020 352 83 Class 10
ISO 5 100,000 23,700 10,200 3,520 832 29 Class 100
ISO 6
1,000,000 237,000 102,000 35,200 8,320 293
Class
1,000
ISO 7 352,000 83,200 2,930
Class
10,000
ISO 8 3,520,000 832,000 29,300
Class
100,000
ISO 9
35,200,00
0
8,320,000 293,000 Room Air

17.  MANUFACTURING PROCESS OVERVIEW
The processes used for manufacturing Lithium batteries are very similar to those used in the
production of Nickel Cadmium cells and Nickel Metal Hydride cells with some key differences
associated with the higher reactivity of the chemicals used in the Lithium cells. The anodes and
cathodes in Lithium cells are of similar form and are made by similar processes. The active
electrode materials are coated on both sides of metallic foils which act as the current collectors
conducting the current in and out of the cell. The anode material is a form of Carbon and the
cathode is a Lithium metal oxide. Both of these materials are delivered to the factory in the form
of black powder and to the untrained eye they are almost indistinguishable from each other. Since
contamination between the anode and cathode materials will ruin the battery, great care must be
taken to prevent these materials from coming into contact with each other. For this reason the
anodes and cathodes are usually processed in different rooms. The metal electrode foils are
delivered on large reels, typically about 500 mm wide, with copper for the anode and aluminum
for the cathode, and these reels are mounted directly on the coating machines where the foil is
unreeled as it is fed into the machine through precision rollers. The first stage is to mix the
electrode materials with a conductive binder to form slurry which is spread on the surface of the
foil as it passes into the machine. From the coater, the coated foil is fed directly into a long
drying oven to bake the electrode material onto the foil. As the coated foil exits the oven it is re-
reeled. The coated foils are subsequently fed into slitting machines to cut the foil into narrower
strips suitable for different sizes of electrodes. Later they are cut to length. Any burrs on the
edges of the foil strips could give rise to internal short circuits in the cells so the slitting machine
must be very precisely manufactured and maintained.

18.  The first stage in the assembly process is to build the electrode sub-assembly in which the
separator is sandwiched between the anode and the cathode. Two basic electrode structures
are used depending on the type of cell casing to be used, a stacked structure for use in
prismatic cells and a spiral wound structure for use in cylindrical cells.
 Prismatic cells are often used for high capacity battery applications to optimize the use of
space. These designs use a stacked electrode structure in which the anode and cathode foils
are cut into individual electrode plates which are stacked alternately and kept apart by the
separator.
 For cylindrical cells the anode and cathode foils are cut into two long strips which are wound
on a cylindrical mandrel, together with the separator which keeps them apart, to form a jelly
roll.
 The next stage is to connect the electrode structure to the terminals together with any
safety devices and to insert this sub-assembly into the can. The can is then sealed in a laser
welding or heating process, depending on the case material, leaving an opening for injecting
the electrolyte into the can.
 The following stage is to fill the cell with the electrolyte and seal it. This must be carried out
in a “dry room” since the electrolyte reacts with water. Moisture will cause the electrolyte to
decompose with the emission of toxic gases. Lithium Hexafluoride (LiPF6) for instance, one of
the most commonly used electrolyte materials, reacts with water forming toxic hydrofluoric
acid (HF).
 Once the cell assembly is complete the cell must be put through at least one precisely
controlled charge/discharge cycle to activate the working materials, transforming them into
their useable form. During formation, data on the cell performance such as capacity and
impedance, are gathered and recorded for quality analysis and traceability. The spread of the
performance measurements also gives an indication of whether the process is under contro

19.  FACILITY REQUIREMENTS
Tight tolerances and strict process controls are essential throughout the manufacturing process. Contamination, physical damage, and burrs on
the electrodes are particularly dangerous since they can cause penetration of the separator giving rise to internal short circuits in the cell and
there are no protection methods which can prevent or control this. Cleanliness is essential to prevent contamination and cells are normally
manufactured in cleanroom conditions with controlled access to the assembly facilities often via air showers. When constructing a Lithium Ion
Battery Facility for Fuel Cell or Field Device use, a particular portion of the facility is required to be a dry (see Figure “A” Cell Assembly)
and/or clean (see Figure “B” Electrode Coating) room. Additionally several preliminary assembly steps (Case Manufacturing, Sub Assembly, and
Welding) possibly will require cleanroom assembly and/or cleaning and packaging due to the need to ensure the substrates do not add or
contribute contamination to the process. Most notably the facilities will have the following parameters:
 Class 10,000 (ISO Class 7) to Class 1,000 (ISO Class 6)
 70° F Temperature Parameters
 2% to 10% Relative Humidity (As low as -40 degree dewpoint)
 Given the above requirements there are several significant technologies, both from an engineering and construction material perspective,
developed for pharmaceutical and semiconductor cleanrooms and BSL (Biological Safety Level) facilities that can or should be applied to these
facilities.
 Desiccant Drying capability will be required to meet the needs of the dry rooms, due to the low level of humidity and dewpoint of the factory air.
Low leakage ductwork (both on the supply and return side) commensurate with the requirements of BSL facilities will be required (meeting
ASHRAE heavy duty duct parameters); however, it will be a polar opposite application (i.e. BSL facilities are designed to be negative pressure
with Lithium Ion facilities being designed to be positive pressure) to help guard against moisture migration. We must be observant that unlike
biological organisms, moisture can migrate against pressure. Additionally buffer zones will be required to provide a degree of safety for the
facility, to allow for the ability to provide for access without compromising the internal “dry” zone. What we have learned in BSL facilities in
terms of pressurization testing and sealing of ducts, dampers, conduits, and doors is directly applicable for dry rooms.
 Hot Buttons, Concepts, and Ideas
 Ducting systems must be inspected and maintained on a continual basis. Potentially a buffer zone may be appropriate for interstitial area.
 Possibly create a sealed plenum overhead and use return as the “buffer” zone.
 People loads are an issue that is significant and the old ASHRAE load assessment is outdated and/or inappropriate. Traditional engineers need an
education.
 Require air locks and pass thrus for material and personnel entry. NO openings. Vapor equalizes against pressure. Use cleanroom and BSL
technology.

20.  Moisture barriers in slabs are of particular concern. Not only will barriers be required to reduce moisture
transfer from ground water, but additional precautions must be taken commensurate with technologies
utilized for sub-water table foundation work even in areas where the facility does not come in contact
with the water table. Low moisture foundation pours will be a standard and hydrostatic resistant slab
treatments, as well as moisture barrier built up (aggregate) epoxies, will be required to eliminate
moisture migration through the floor. This technology is a direct transfer from Pharmaceutical applications
but will have the additional requirement to dissipate static (due to the dry conditions), withstand stains
from chemicals utilized, and the ability to be cleaned without utilizing water. Ergonomics of personnel
working on these surfaces should also be incorporated into the correct product selections.
 Hot Buttons, Concepts, and Ideas
 Vapor Barrier when pouring the slab. Tapped seams, topped with sand prior to rebar and concrete, so
barrier is not punctured during installation or concrete pour. Inspected during installation and certified to
be sealed.
 “High Early” concrete mix to minimize moisture content in the slab.
 Enclose the box that the facility will be constructed within and use desiccant driers during construction.
Create a build clean/dry protocol to ensure the minimization of latent moisture as well as particulate.
 Use a slab treatment to seal against moisture penetration through the slab (Koester manufactures a
particularly good product).
 Use epoxy slab coating to ensure slab is not compromised.

21.  Modular systems used for Pharmaceutical and BSL facilities lend themselves particularly to application in this marketplace
(with particular modifications to address static dissipation), due to their precise manufacturing parameters and durability.
We are not concerned with the ability to hold up to harsh cleaners but we are concerned with the ability to withstand
caustic chemicals used in the cells and to provide for static dissipation due to extremely dry conditions, while being required
to create a strong vapor barrier. Manufacturers with both experience in wafer fab facility wall systems (for the chemical
resistance of the surface coating and static dissipative capabilities) and Pharmaceutical/BSL applications (for the pressure
maintenance and door seals) are the only firms that can provide a system delivered to meet the unique combination of this
application, not to mention that a good portion of the facility will also be a cleanroom in nature. Particular concerns relate
to panel to panel seal, flexible yet moisture barrier caulking, internal penetration seals, and interface with the floor
installation. Applying pharmaceutical door openers with interlocks, and entrance control prevalent in Pharma facilities, may
be an important application to control facility access.
 The ceiling is of considerable concern and a panelized Pharma type modular ceiling has particular attraction for several
reasons. A standard 2′ x 4′ T-Bar type ceiling is not practically viable in this type of environment due to the required vapor
barrier and inability of a T-Bar ceiling to create and maintain that barrier over time. A gel type ceiling, used for cleanroom
wafer fabs, is appropriate, and will maintain the vapor barrier, but is not cost effective. A standard drywall lid as is used for
rated corridors (1 hr. and 2 hr. construction) can be constructed to meet the vapor transmission requirements but that would
require an elaborate catwalk system to maintain and inspect the ducting system overhead, and over time the maintenance
required to the envelope would be costly. A modular panelized ceiling that is also walk-able for maintenance and service
would achieve the desired barrier and provide for all ceiling maintenance to be done from above (as is the goal in Pharma
facilities for different objectives) without requiring catwalks for maintenance.
 Hot Buttons, Concepts, and Ideas
 Need cam locked panels for seal to ensure zero vapor transmission.
 Require air locks and pass thrus for material and personnel entry. No openings, vapor equalizes against pressure. Use
cleanroom and BSL technology. Must create vapor barrier and maintain seal. Can’t move with building movement,
independent support from floor. Not issue if floor above is fan deck and not single story.
 Must use materials that do not hold moisture (drywall or fiberboard ceiling tiles are an issue) or dry and crack.
 Maintenance must be achieved without penetrating without compromising the envelope seal.
 Light fixtures must be maintained from above so no penetration of the ceiling is required. Ideally they should be vapor
sealed to sealing (Wet area application and/or explosion proof housings) to achieve the desired control.

22. OVERVIEW VIDEO OF THE DEHUMIDIFIERS IN FACTORY

23. BATTERY MANUFACTURING PROCESSES
1. Mining
Hard rock mining and extraction from deep brine sites is used to obtain lithium.
2. Processing
Lithium salt is converted to lithium carbonate or lithium hydroxide.
3. Raw Material R&D Testing
Quality control testing ensures consistent raw materials are being produced and
should be
conducted in a dry room with a Low Dew Point Dehumidification (DH) system
maintaining ultra-dry conditions.

24. 4. University / Private R&D Testing
Similarly, universities, government laboratories, and startups are conducting research
on new chemistries and battery cell production methods
to improve energy density of lithium batteries. Ultra dry conditions are achieved with
DH systems.
5. Mixing
Electrode formation begins with mixing of ingredients which are then coated on metal
foils to make the anodes and cathodes. The anode and cathode slurries are isolated in
separate areas to avoid cross-contamination. Chemical mixing is located in a dry room
using DH systems.
6. Coating/Drying
The electrodes are made on separate coating lines with copper foil for the anodes
(negative charge) and aluminum foil for the cathodes (positive charge). Moisture can
cause poor quality
and performance, so coating and drying takes place in a dry room with . DH systems.
The volatile organic compounds (VOC) in the coatings evaporate in the drying tunnel.
Since VOCs are regulated pollutants, the emissions are sent to a . Zeolite Rotor
Concentrator
System where they can be destroyed or recovered for re-use.

25. 7. Calendaring/Compressing
The electrode reels are then fed into a calendaring machine where the coated
foil is compressed to a specific coating density with tight tolerances. This step is
located in a dry room with DH systems.
8. Slitting/Punching
Advanced laser equipment is used to slit or punch the electrodes. Quality is
ensured using a dry room with . DH systems.
9. Winding/Stacking
The anodes and cathodes are assembled with a separator in between them. They
can be wound to form a jelly roll for cylindrical cells, wound around a mandrel
for a prismatic cell or cut into individual plates and stacked for pouch cells. This
step is located in a dry room with . DH systems.
10. Tab Welding
The anodes are clamped together with a welded tab as are the cathodes. These
tab contacts exit the cell casing and carry the electric current to an external
source. Defects are avoided by locatingthis step in a dry room with . DH systems.

26. 11. Vacuum Drying
Air from the casing is evacuated and the top and sides of pouch casings are heat
sealed. This step is located in a dry room with . DH systems.
12. Electrolyte Filling
The cell is injected with liquid organic electrolyte solution with an automated pump
under vacuum conditions. Because the electrolyte is highly reactive with moisture,
this should take place in a dry room at -40 or -50°C dew point, maintained with . DH
systems. VOC exhausted from electrolyte fi lling should be captured and treated by a
. Zeolite Rotor Concentrator System.
13. Final Welding/Sealing
Final welding and heat sealing is used to finish sealing and cleaning the cell. This is
located in a dry room with . DH systems.
14. Formation
After fi nal cell assembly, the cell must be activated by a controlled
charge/discharge. Data on capacity, discharge, resistance and capacitance are
measured so that bad cells can be removed. Standard climate control at 40-50%
Relative Humidity is suitable although some customers may locate this equipment
within their dry room.

27. 15. Testing
Prior to shipment, mechanical and dynamic testsmeasure properties such as battery
capacity, voltage, power output and discharge time. Standard climate control is
suitable although some may locate this equipment within their dry room.
16. Packaging
Battery cells are sorted and packaged for distribution. Standard climate control is
recommended.
17. Shipment
Battery cells are then shipped and ready for integration. For an electric vehicle
application, thousands of cells are assembled into a battery pack. Battery pack
assembly is a separate process from battery cell manufacturing.

28. General parameters for li ion battery
manufacturing rooms
 In manufacturing of Lithium batteries there is a requirement of very low humidity conditions –
typically below 1% RH or lower (- 35°C or -90°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

30. General data requirements by the
dehumidifiers companies
Dry room dimensions (Internal)
Length x Width in Meters(Internal)
Height in Meters(Internal)
Ante / Air lock room dimensions(internal)
Length x Width in Meters(Internal)
Height in Meters(Internal)
Humidity level to be maintained inside dry room (RH in %) or in Dew point Degree C
Temperature to be maintained inside the Dry room in °C
No. Of Occupants
Door size & Qty.
Door opening per hour
Electrical equipment connected load inside the dry room
Clean room class
Ambient conditions - Temp.in °C & RH
Sorrounding conditions if applicable - Temp in °C & RH
Light illumination in Lux
PUF panel (100 mm thick) cladding (PPGI 0.8 mm thick or SS304 0.8 mm thick)
Duct material of construction
Duct cladding material of construction
Dimensions of the room (Length, Breadth, Height in Feet)
Volume of the room in cu.ft (Just multiply the three above values)
Temperature required to be maintained
Temperature outside the room
Existing Relative Humidity (in %)
Target Relative Humidity; after installation of dehumidifier (in %)
Type of A.C being used inside the room
Capacity of the A.C in terms of tonnage
No. of air changes per hour in case of Air Handling Unit (in CFM units)
Fresh air component ( in %, incase of Air Handling Unit)
No. of times door opens in a day
No. of people working in the room
Type of work carried out in the room. Is it a 24 x 7 application.
Type of equipment used in the room and
heat generated due to the same.
Brief address of installed location (Please write below)

31. DATA GIVEN BY THE DEHUMIDIFIER
MANUFACTURERS
 BY HARRISON PHARMA
https://drive.google.com/open?id=0B2bvsszg0pnFbEhKTG93QXZ5dGNyMTJKM
ms4M0E1REp4S2hz
 BY DUEX
https://drive.google.com/open?id=0B2bvsszg0pnFd1NSNWQ0RUVXR2hLdWFNV
mZnXzc1R0dhTXlj
 BY BRY AIR
https://drive.google.com/open?id=0B2bvsszg0pnFNnV4V1RicGFQUXpFc2lGUjF
TSTFEb2pJd3Zv

32. Links of pdfs and sites that is useful for
clear depth of the project
 https://drive.google.com/open?id=1n-NBwGkxcI1a56JIO8zzxjOdef0yyJfT – for clean room
requirement of the battery manufacturing
 https://www.mpoweruk.com/battery_manufacturing.htm - FOR LITHIUM BATTERY MANUFACTURING