Mitsunami Co., Ltd. Mitsunami Co., Ltd.

Mitsunami Co., Ltd.

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Lithiumu battery
solution

Taking advantage of many years of experience in handling Panasonic's batteries and partnerships with battery pack manufacturers in Japan and overseas, we undertake the development of custom battery packs for customers using lithium-ion / polymer cells.

Custom Lithium Battery Packs

In order to develop the best custom battery pack for our customers, we will support you from the stage of examining the required specifications.
In addition, we will provide the most suitable battery pack manufacturer and lithium-ion battery cell selection, quotation/development schedule planning, manufacturing/quality control, delivery, and troubleshooting.
We coordinate between customers and battery pack manufacturers in various processes.

Commissioned development of Custom Lithium Battery Packs

We will support our customers from the stage of considering required specifications.

We select battery pack manufacturers that match the customer's requirements from Japan and overseas, and select the lithium battery cells that are most suitable for the required specifications.

- Supports various cylindrical cells, prismatic cells, and pouch cells. You can achieve the desired voltage capacity by connecting multiple battery cells in series or parallel.

- Please contact us first regardless of the size of the lot quantity. You can also request to obtain the necessary certifications (UL2054, PSE, etc.). Please refer to the next section for an overview of how to proceed with development. "

Commissioned development of
Custom Lithium Battery Packs

Overview of how to proceed with development

Customer Mitsunami Proposal for electronics Domestic/overseas packers

STEP 1 Specification request

In the development of a custom battery pack, the customer first creates the required specifications necessary for development (there is no need to write it down in writing; it is fine to list it in an email).
As for the requested specifications, please provide specifications such as battery pack capacity, voltage, discharge current, pack material/shape, and charge/discharge protection function. At that time, we will support the specification study so that the possibility of realization will be high.

For example, even if you are developing a custom battery pack for the first time, we will support you from the beginning. We can also undertake the development of chargers together with custom battery packs.
Please also consider outsourcing the charger.

Cell selection ①
Cylindrical/prismatic cell (lithium ion)
Based on the cylindrical standard cell 18650, various sizes (cells of approximately 2,000 mAh to 3,500 mAh) are available.
For prismatic cells, please contact us separately.
The hard pack is an image that can be detached from the equipment. (See photo below) A soft pack is an image that is embedded in a device and used. (See photo below)
Rather than replacing the battery due to deterioration of the cell, please think of the deterioration of the cell as the service life of the device.

Cell selection ②
Pouch cell (lithium polymer)
It is ideal for inclusion in small/lightweight devices such as wearable devices. Pouch cells are available from approximately 25mAh to 1,550mAh. It is an image that is embedded in the device and used.
Rather than replacing the battery due to deterioration of the cell, please think of the deterioration of the cell as the service life of the device.

Please leave safety and security to us

Design of charge/discharge protection circuit
Lithium batteries have a dangerous image of generating heat and catching fire.
We have a lot of know-how in charge/discharge protection from many years of battery pack development. We will include a protective circuit for security and safety in the battery pack you entrust.
The charging function of the charger, etc. is also very important for charge/discharge protection. We will do our best to support the development of your charging function.

Acquisition of various certifications
Lithium batteries must acquire various certifications such as safety standards and transportation standards. Please entrust us with such troublesome certification acquisition.

Lithium-ion Battery Packs

This is an introduction to lithium-ion battery packs and custom battery packs.
As a general rule, we do not sell cells, but we accept requests for custom battery packs that incorporate an electronic circuit that prevents overcharging and overdischarging.
After hearing from the customer about the usage conditions of the device and the specifications required for the battery, we determine the specifications of the cell and battery pack through meetings, etc., and carry out new development.
We will ask you to set the minimum order unit, and we will respond as a made-to-order product.

Product introduction
Material: Ternary system
Capacity: 5.3~9.3Ah
Features: High energy density, high output
Parallel connection possible (series connection not possible)
Various dedicated chargers available

Application example
・Industrial / Drone、Robote

Furukawa Battery Co., Ltd.

Company Profile
Head office location: Yokohama City, Kanagawa Prefecture
Founded: 1950
Employees: 2,369
Business: Lead storage batteries, alkaline storage batteries Lithium-ion batteries, power supplies, etc.
Certification: ISO9001, ISO14001, etc.
URL:https://www.furukawadenchi.co.jp

■ Product list

Intelligent lithium-ion battery pack
for robots

Intelligent lithium-ion battery pack
for drones

Lithium-ion battery cell list

Product introduction
Material: Confirmation required
Capacity: 660mAh ~ 5,200mAh
eatures: No development costs required

Application example
・Wearable device、Automotive
・Consumer electronic1
・Medical device、Power tools
・Industry / Robotics

VARTA AG

Company Profile
Head office location: Ellwangen, Germany
Founded: 1887
Employees: Approximately 4,800 (global)
Business description: Lithium-ion solution & micro battery and "household battery" business
Certification: ISO9001, ISO14001, etc.
URL:https://www.varta-ag.com/en

■ Product list

Pouch Cells

Product introduction
Material: Cobalt acid system
Capacity: 10mAh ~ 1,550mAh
Features: Small size

Application example
・Wearable device、Mono headset
・Stereo headset / headphone
・Accessories、Audio player、
・Wireless speaker

SYNergy ScienTech Corp

Company Profile
Head office location: Hsinchu City, Taiwan
Established: 1997
Employees: about 1,250
Business: Design, development and manufacture of lithium polymer batteries
Certification: ISO9001, ISO14001,
ISO45001,C080000, SONY GP
URL:http://www.synst.com.tw

■ Product list

Button Cells

Product introduction
Material: Cobalt acid system / ternary system
Capacity: 43mAh ~ 75mAh
Features: Small size

Application example
・TWS True Wireless Headsets
・Smart watches
・Medical devices

SYNergy ScienTech Corp.

Company Profile
Head office location: Hsinchu City, Taiwan
Established: 1997
Employees: about 1,250
Business: Design, development and manufacture of lithium polymer batteries
Certification: ISO9001, ISO14001
URL:http://www.synst.com.tw

Product introduction
Material: Confirmation required
Capacity: 29mAh ~ 130mAh
Features: No development costs required

Application example
・Wearable device、Automotive
・Consumer electronic1
・Medical device、Power tools
・Industry / Robotics

VARTA AG

Company Profile
Head office location: Ellwangen, Germany
Founded: 1887
Employees: Approximately 4,800 (global)
Business description: Lithium-ion solution & micro battery and "household battery" business
Certification: ISO9001, ISO14001, etc.
URL:http://www.synst.com.tw

CONTACT Inquiries about products