Focused solutions for all aspects of lithium-ion battery manufacturing

Riken Keiki has been involved in the research and manufacture of lithium-ion batteries since the early stages of development. More than 10,000 units are in use at the production sites for lithium-ion batteries worldwide. RIKEN KEIKI continues to improve the safety of lithium-ion battery production through continuous improvement and integrates customers' needs into its products.

Gas monitoring for coating and drying processes

 

Measurement of vaporized combustible gases at high temperature.

Highly heat-resistant in-line measurement.

Withstand operating temperatures up to 200 °C.

Ideal for coating and drying processes.

 

Measure the gas concentration exactly in the center of the exhaust duct.

The design with inline sensor (250 mm) allows conventional diffusion on the sensor without an additional pump.

 

ATEX/IECEx/UL certifications/approvals. Explosion-proof design. Globally recognized approvals!

 

Resistant to silicon contamination that affects the sensitivity of conventional sensors. In volatile organic silicon atmospheres, catalytic contamination (formation of a SiO2 film) due to chemical reactions affects the sensitivity of the sensor to the catalytic combustion method.

 

Silicon contamination

Sensors contaminated with silicon cannot provide correct readings because the response to NMP is compromised. For this reason, RIKEN has taken measures to reduce the sensor's loss of sensitivity.

Ethanol is widely used as a calibration gas, which is relatively easy to obtain and handle. However, since ethanol has a low molecular weight, it will react with a "silicon-contaminated, damaged sensor". RIKEN KEIKI managed to suppress the deterioration to display the exact NMP gas concentration using a sensor calibrated to ethanol.

Device comparison to the Monitoring of combustible gases

Importance of gas detection

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Why is it important to detect gases in the production of lithium-ion batteries?

In the production of lithium-ion batteries, gases are used or generated in processes that can be flammable or toxic. Exceeding the allowable concentrations of these gases may pose a hazard to your personnel and equipment. Protect your employees and property by installing gas detectors designed for lithium-ion manufacturing applications.

Lithium-ion battery manufacturing process:

Electrode production - drying process

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In the manufacture of electrodes for lithium-ion batteries, NMP is used as a solvent. NMP only evaporates at high temperatures during the drying process. As the NMP concentration increases, the risk of explosion increases. An ideal place for detecting NMP is the exhaust duct. By inserting the probe directly into the exhaust duct, NMP is detected in the middle of the duct and can withstand high temperatures and high concentrations.

RIKEN KEIKI products for drying processes

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GD-A2400

Ex-proof

0°C ~ +160°C

 

SD-2500

Concentration display

Ex-Proof

0°C ~ +160°C

 

SD-2600

Concentration display

Ex-Proof

0°C ~ +260°C

 

 

SD-2700

Ex-proof

0°C ~ +250°C

 

Battery cell construction - electrolyte filling process

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Various solvents are mixed into electrolytes, for example, DMC, EMC and DEC. These can explode upon evaporation, so gas detectors are required.

Gas detectors for electrolyte filling processes

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SD-D58 (HW sensor)

Concentration indicator

Pump unit

Ex-proof

 

SD-1GP

Concentration indicator

Catalytic sensor

Pump unit

Ex-proof

 

SD-1RI

Concentration indicator

Diffusion

NDIR sensor

Ex-proof

 

SD-1EC

Concentration indicator

Electrochemical sensor

Diffusion

Ex-proof

 

SD-1OX

Concentration indicator

Electrochemical sensor

Diffusion

Ex-proof

Cell Testing Process

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Every lithium-ion battery must pass a test. During the evaluation test, flammable and toxic gases can be produced from the battery. Gas concentration monitoring is essential to prevent ignition and poisoning accidents during the testing process. When the gas detector detects the target gas, outside air must be sucked in from the inlet/outlet damper to reduce the gas concentration in the test equipment.

Gas detectors for the test process

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GD-70D

Concentration indicator

Interchangeable sensor modules

Pump unit

Standard G1/4" screw-in connections

Manufacturing process for separators

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

Gas monitors for separator production processes

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FI-900

Concentration display

Need external sampling unit

Ex-proof

 

SD-1GP

Concentration indicator

Catalytic sensor

Pump unit

Ex-proof

 

SD-1RI

Concentration indicator

Infrared sensor

Diffusion

NDIR sensor

Ex-proof

 

SD-1GH

Concentration indicator

Semiconductor sensor

Diffusion

Ex-proof

Electrode Fabrication - Portable Gas Detectors for Personal Protection

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Riken Keiki's portable gas detectors personally warn team members of gas alarms. With the smallest and lightest 4-gas detector, workers can comfortably carry gas detectors within the recommended breathing zone.

 

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Portable gas detectors

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GX-3R

Portable

Ultra-compact

Ex-proof

Up to 4 gases

HC/CH4/O2/CO/H2S

 

GX-3R Pro

Portable

Ultra-compact

Ex-proof

up to 5 gases

CH4/O2/CO/H2S/CO2/SO2

 

GX-6000

Portable

with pump unit

Ex-proof

VOC gases

 

SP-220 Type SC

Portable

Hot Wire Semiconductor Sensor

with integrated pump

Leak detector

 

SC-8000

Portable

Electrochemical sensor

with pump unit

Ex-proof

Single gas measuring device

GADMS Lite
remote monitoring system

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In addition to gas detectors, RIKEN KEIKI's original "GADMS Lite" system is also available for access to remote monitoring, configuration and alarm history via a PC, tablet or smartphone.