Gas Detection Solutions for
Lithium-ion Battery Production

Providing safe work environments and stable production

GX-3R
GD-A2400
  • NMP monitoring for Drying ProcessesNMP monitoring for
    Drying Processes
  • Combustible and Toxic gas monitoring for Electrode Filling ProcessesCombustible and Toxic gas monitoring for Electrode Filling Processes
  • Oxygen deficiency monitoringMonitoring Solutions for
    Testing Processes
  • Monitoring Solutions for Testing ProcessesOxygen Deficiency
    Monitoring
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RIKEN KEIKI Co.,Ltd.

A leading manufacturer of gas detectors with its own sensing technology for more than 80 years. Involved in Lithium-Ion battery manufacturing process for over 20 years since the development stage.

Riken Keiki's involved in the research and manufacturing of lithium-ion batteries since the early stage of development. Over 10,000 units are in operation at the lithium-ion battery production sites around the world. We will continue to support the safety of lithium-ion battery production by continuous improvement and responding to the costumers voices.

Riken Product Advantages

Focused solutions for all aspects of
Lithium-ion Battery Production

Riken Keiki has developed gas detection solutions for all production processes of lithium-ion battery manufacturing, which are typically high temperature environments. By utilizing direct insertion and heat resistant gas detection technology, accurate gas monitoring can be achieved in high temperature conditions often required by coating and drying processes.

Gas monitoring for
Coating and Drying

  • POINT 01
    Measuring vaporized combustible gas at high temperature High heat resistant duct-mounted monitors
    withstand operating temperatures up to 200℃,
    ideal for coating and drying process.
  • POINT 02
    Accurately measure gas concentrations at the duct center point. Direct insertion design (250 mm) enables diffusion
    monitoring at the center of the duct.
  • POINT 03
    ATEX/IECEx/UL certificateions/approvals Explosion-proof design
  • POINT 04
    Resistance against silicon Low sensitivity degradation, excellent safety
GD-A2400

Silicon material covers the catalyst surface of the sensor and then it reduces the sensor sensitivity.

In volatile organic silicone atmospheres, catalytic poisoning (SiO2 film formation) due to chemical reactions degrades the sensitivity of catalytic combustion method sensor.

In volatile organic silicone atmospheres, catalytic poisoning (SiO2 film formation) due
to chemical reactions degrades the sensitivity of catalytic combustion method sensor.

Silicone poisoned sensors cannot provide correct readings because the response to NMP is degraded.
Therefore, RIKEN has taken measures to reduce the sensitivity degradation in the sensor.

Sensitivity Change due to Silicon Poisoning
※ Riken in house data

*In general, Ethanol often used as the calibration gas which is relatively easy to obtain and handle. However, since ethanol has a small molecular weight, “silicon poisoned deteriorated sensor” will react. RIKEN KEIKI succeeded to suppress the deterioration in order to display the accurate NMP gas concentration with ethanol calibrated sensor.

Combustible Gas
Monitoring Comparison
Company Company A Company B Company C
Insertion depth check mark250mm 250mm Not Available 250mm
Operating temperature (Sensor) check mark0℃ ~ +200℃ -20℃ ~ +80℃ -40℃ ~ +150℃ 0℃ ~ +160℃
ATEX / IECEx/ UL check markAcquired Acquired Acquired Not Available
RIKEN KEIKI
(SD-2600)
  • Insertion depth
    RIKEN KEIKI
    (SD-2600)
    check mark250mm
    Company A
    250mm
    Company B
    Not Available
    Company C
    250mm
  • Operating temperature (Sensor)
    RIKEN KEIKI
    (SD-2600)
    check mark-20℃ ~ +200℃
    Company A
    -20℃ ~ +80℃
    Company B
    Not Available
    Company C
    250mm
  • ATEX / IECEx/ UL
    RIKEN KEIKI
    (SD-2600)
    check markAcquired
    Company A
    Acquired
    Company B
    Acquired
    Company C
    Not Available

Importance of Gas Detection

Why detect for gases in lithium-ion battery production?

During the production of lithium-ion batteries, processes use or generate gases, which can be combustible or toxic. Exceeding safe concentrations of these gases can put your people and equipment at risk. Protect your people and property by installing gas detection designed for lithium-ion manufacturing applications.

Lithium-ion battery production process
Lithium-ion battery production process
Process
Electrode manufacturing Drying process

In the production of electrodes for lithium-ion batteries, NMP is used as a solvent. NMP will only vaporize at high temperatures during the drying processes. As concentrations of NMP build up, the risk of explosion increases. An ideal location to detect NMP is within the exhaust duct. By utilizing direct insertion design into the exhaust duct, detection of NMP will be at the center of the duct and able to withstand high temperatures and high concentrations.

Electrode manufacturing Drying process image
Products lineup for Drying process
GD-A2400

GD-A2400

Ex-proof0℃ ~ +160℃
Detail
>SD-2500

SD-2500

Concentration displayEx-proof0℃ ~ +160℃
Detail
SD-2600

SD-2600

Concentration displayEx-proof0℃ ~ +200℃
Detail
SD-2700

SD-2700

Concentration display0℃ ~ +250℃
Detail
Process
Cell assembly Electrolyte filing process

A variety of solvents are mixed in electrolytes, such as DMC, EMC, and DEC. These have the potential to explode if vaporized, so gas detectors are required.

Cell assembly Electrolyte filing process image
Electrolyte Filling Process Gas Monitors
SD-D58(HW - Sensor)

SD-D58 (HW - Sensor)

Concentration displayPump suction TypeEx-proof
Detail
SD-1GP

SD-1GP

Concentration displayDiffusion TypeEx-proof
Detail
SD-1RI

SD-1RI

Concentration displayDiffusion TypeNon-Dispersive Infrared Method SensorEx-proof
Detail
SD-1GH

SD-1GH

Concentration displayDiffusion Type
Ex-proof
Detail
SD-1OX

SD-1OX

Concentration displayDiffusion Type
Ex-proof
Detail
Process
Cell finishing Testing process

Every Lithium-ion battery is required to pass a test without emitting gas in a harsh environment. Combustible gas and toxic gas may be generated from the battery in the evaluation test process. Gas concentration monitoring is essential to prevent ignition and poisoning accidents during the testing process. When the gas detector detects the target gas, it is necessary to take outside air from the intake / exhaust damper to reduce the gas concentration in the test equipment.

Cell finishing Testing process image
Testing Process Gas Monitors
GD-70D

GD-70D

Concentration displayPump suction Type
Detail
Process
Separetor Separator production process

Dichloromethane (DCM) and other solvents are used for cleaning purposes in the production process of separators for lithium-ion batteries. For measuring low-concentration solvent gas and combustible gas, RIKEN KEIKI's gas detectors are ideal solutions for separator processes.

Separetor Separator production process image
Separator Production Gas Monitors
FI-900

FI-900

Concentration displayNeed external sampling unitEx-proof
Detail
SD-1GP

SD-1GP

Concentration displayDiffusion TypeEx-proof
Detail
SD-1RI

SD-1RI

Concentration displayDiffusion TypeNon-Dispersive Infrared Method SensorEx-proof
Detail
SD-1GH

SD-1GH

Concentration displayDiffusion Type
Ex-proof
Detail
Process
Electrode manufacturing Portable Gas Detection for Personnel

Riken Keiki’s portable gas detectors provide team members with personal warnings of gas alarms. Offering the smallest and lightest 4-gas monitor, workers can comfortably wear gas detection within the recommended breathing zone.

Electrode manufacturing Portable Gas Detection for Personnel image
Portable Gas Detectors
GX-3R

GX-3R

PortableUltra compactEx-proofMax.4 gases
Detail
GX-3R Pro

GX-3R Pro

PortableUltra compactEx-proofMax.5 gases
Detail
GX-6000

GX-6000

PortablePump SuctionEx-proofVOC Gas
Detail
SP-220 Type SC

SP-220 Type SC

PortablePump Suction TypeLeak cheker
Detail
SC-8000

SC-8000

PortablePump sctionEx-proofSngle gas
Detail

Remote monitoring system
GADMS Lite
GADMS Lite

Along with gas detectors, RIKEN KEIKI's original "GADMS Lite" system is available for accessing remote monitoring, configuration, and alarm history from a PC, Tablet, or Smartphone.

Host system GADMS Lite
  • it is effective
    for small and medium
    scale systems
  • Real-time detector
    reading can be
    checked remotely
  • Event history can be checked
  • Cost effective
    easy solution

Live demo GADMS Lite available to view from your PC, Tablet and Smartphone.

Inquiry Form

Case Study

Since the birth of the lithium-ion battery, RIKEN KEIKI's gas detectors have kept pace with technological innovation and have been used by many customers.
Frequent Sensor Sensitivity Deterioration.

After consulting with RIKEN Keiki with investigation, it was found that the cause was the silicon contained in the packing of the machine was melted into the gas. We replaced with the SD-2500 which has resistance against silicon which can damage the sensor. We were able to detect the NMP gas which has risk of causing huge damage to the factory as well as maintaining our safety.

NMP is collected and reused in the drying process.

If the concentration of NMP rises, there is a danger of explosion. SD-2500 is a direct duct insertion type, and the gas sensor can be placed to the center of the duct where the highest gas concentration. In addition, the explosion-proof design is capable to measure in high temperatures where NMP vaporized environment. Provides us a confidence to keep our safety.

SD-2600 is an ideal product for coating and drying process, close to 200℃

Riken Keiki equipment is design for use in high temperature environments up to 200℃, while measuring NMP with high accuracy and reliability.
Ensuring safety was our goal and product can be installed in the high temperature.

We are able to find suitable detector for low concentaration gas.

We needed gas detector possible to measure PPM level for combustible and toxic gas at electrolyte filling process. Riken was able to adjust the range according to our request.

Continuous measurement enabled productivity improvement and cost reduction.

Continuous measurement of solvent is essential for the separator manufacturing. Accuracy and maintenance free (no sensor replacement!) FI-900 was our choice after the consultation with Riken.

Extensive international network
for reliable and complete support

Utilizing our established overseas network, you could purchase
our product and services all over the world.

  • Affiliated company
  • Distributor
world map

About us

Since our company was founded in 1939 under the umbrella conglomerate of RIKEN, our management philosophy has been to create safe working environments. Our science and technology research laboratories have developed industrial gas detection warning devices, specializing in monitoring harmful gases in the work environment, as well as for explosion prevention from combustible gases. Without compromise, we continue to challenge ourselves to be technological leaders, developing and manufacturing a wide range of industrial gas detection systems and monitors. From large-scale gas detecting alarm systems to small-sized personal gas monitors for safety protection; used in many industries including semiconductor and LCD plants, petroleum complexes, steelworks, various tankers, oil storage stations, underground gas facilities, and volcanoes.

Office building
Experts in gas detection for over 80 years image

Experts in gas detection for over 80 years

The “RIKEN Gas Detector” utilizing the principle of light wave interference, was exhibited at the 1937 Paris World Exposition. Its subsequent use greatly contributed to the prevention of accidents in coal mines where many fatalities were prevalent at the time. On the 15th March 2019 we celebrated our 80th anniversary. Supported by our history and tradition we shall further improve long established technology, and continue to innovative. Developing reliable quality products in response to the diverse needs of industry.