Tab Lead

Features of Futaba's Tab Leads

Features of Futaba's Tab Leads

High Reliability

Electrolyte Resistance

Inside a lithium-ion battery is an electrolyte made by dissolving LiPF6 (lithium hexafluorophosphate) and other substances in an organic solvent.
It is known that when water reacts with this electrolyte, hydrofluoric acid is generated.
This hydrofluoric acid corrodes the leads and reduces adhesion to the seals, which can cause electrolyte leakage.
Futaba's tab leads have high electrolyte resistance and can maintain high sealing performance for a long period of time due to our original surface treatment of the lead material.


Sealing Perfomance

To prevent electrolyte inside the battery from leaking out, the tab leads must have sealing performance in addition to adhesion to the leads and packaging materials.
Our tab leads have few burrs, and by optimizing the adhesion method of the seal, there are no air gaps at the lead edge, resulting in high sealing performance.

Sealing Perfomance

Heat resistance of sealing material

The manufacturing process for laminated batteries involves thermo-compression bonding of the packaging material and tab leads.
The sealant that is made thinner by this thermo-compression process increases the risk of a short circuit between the packaging material and the tab leads.
Futaba's tab leads retain their thickness by using heat-resistant seals.
We also use a dual-type, three-layer (adhesive/heat-resistant/adhesive) sealant to ensure good adhesion to the packaging material.


Desiccant Blended Sealant (Under Development)

It is known that when moisture enters the inside of a lithium-ion battery, hydrofluoric acid is generated, resulting in degradation of the battery's performance.
Futaba develop, manufacture, and sell desiccants for organic light emitting diode (OLED) displays, whose properties are also degraded by moisture.
We are using this technology to develop tab leads that capture minute amounts of moisture that enter through the sealing of the tab lead.


Please feel free to contact us if you have any issues with battery reliability, life, or safety, or if you would like to request a quote or sample of our tab lead.

Supports Quick Charging

In recent years, as the cruising range of electric vehicles (EVs) has been extended, the need for rapid battery charging has increased.
Rapid charging requires low resistance of the battery itself, and the tab leads must be thicker, but thicker leads may reduce the sealant performance.
We are developing thick tab leads (1 to 3 mm) that can guarantee sealing performance by adding a tapered shape to the lead and by changing the bonding method of the seal.


Please feel free to contact us for quotations and samples of our quick charging tab leads.

Flexible Custom Development

We supply custom-developed tab leads that are best suitable for our customers' requirements and applications.
We can manufacture not only conventional rectangular, but also L-shaped, T-shaped, bent, and drilled tab leads, which are complex and difficult to process.
We will propose the most suitable tab lead according to the customer's requirements.


For more information, please visit this page.

Quality & Process Control Suitable for Automotive

Track record of supplying automotive products, IATF16949 certified factory

Factory appearance

We also manufacture fluorescent display (VFDs), touch panels (TPs), and organic light-emitting diode displays (OLED), which are widely used by major automakers and automotive parts manufacturers in Japan, Europe, and the United States.
Our own factories in Japan, Taiwan, and the Philippines are certified under the IATF 16949 quality management system for the automotive industry, and can be used with confidence in products that require high quality and reliability.
Tab leads will also be controlled in accordance with IATF16949.

Product management with traceability

Product management with traceability

Two-dimensional barcodes can be printed on products to track the following information

  • Date of manufacture, processing time
  • Material lot for lead and sealant
  • Sealant thermocompression process data (temperature, time, etc.)
  • Automatic Optical Inspection (AOI) image data, etc.

Global Sales Network & Strong Local Support

Overseas Affiliates

We have many sales offices in Japan, North America, Europe, and Asia, and our products are available for purchase both in Japan and overseas.
You can communicate with us in Japanese or any other official local language for product introduction, quotation, and technical support.
After-sales service is also provided by our local staff in a timely manner.
If you would like us to deliver directly to your overseas locations without going through Japan, or if you would like us to provide technical support in the local language, please contact us.
We can also provide technical support in the local language, as well as quick response to any problems that may arise.

If you would like to request a quote, a sample or demo, or have any questions about our products, please feel free to contact us via our contact form.