大北製作所 List of Products and Services

At Daibei Manufacturing, we propose a comprehensive solution for battery exterior components, delivering welded structural battery cases and lid assemblies as a set. 【Product Features】 ■ Capable of handling prototypes and small-lot mass production! We do not use expensive stamping molds for the cases, which helps reduce initial costs, making it suitable for prototype to small-lot mass production (around a few thousand units per year). ■ Able to accommodate detailed requests! We provide a one-stop service from design to material procurement and manufacturing, allowing us to smoothly respond to small changes. ■ Good fit and airtightness The fit between the case and lid is carefully checked during production, ensuring no issues. Additionally, we conduct helium leak tests on all units of the case and lid assemblies to guarantee airtightness. If you have any concerns regarding battery components from the development to mass production of lithium-ion secondary batteries, please feel free to consult us. 【Manufacturing Achievements】 Cases (aluminum, stainless steel, titanium), sealing plates, current collectors, terminals, safety valve processing, rivet fastening 【Examples of Applications】 Prototyping to mass production of battery components for special applications such as aerospace Prototyping and development of battery cells for HV/EV applications.

• Lithium-ion battery

Our company primarily manufactures battery components, including welding cases, sealing plate assemblies, and peripheral parts. We can provide comprehensive support from the production and assembly of various parts associated with sealing plates to airtight testing. Additionally, we can offer consistent support from the design to the manufacturing of battery cases and lid assemblies. Ohkita Manufacturing, with over 40 years of experience in the production and sales of specialized battery components for aerospace applications, is here to assist you in bringing your battery development ideas to fruition. 【Manufacturing Achievements】 Cases (aluminum, SUS, titanium), sealing plates, current collectors, terminals, bus bars, silver chloride plates, safety valve processing, rivet fastening.

• Lithium-ion battery

Our company manufactures aluminum and stainless steel battery cases using "welding and bending processing." Since no drawing dies are required, we can produce at a low cost, making it suitable for small-batch production of various types. We can meet a wide range of requirements such as dimensional accuracy, appearance, and airtightness, and we are also capable of welding thin metals of less than 0.1mm. 【Features】 ■ Bending thin plates using a press machine and welding with a laser welder, etc. ■ Eliminating the deep drawing process allows for production in a short period. ■ Capable of meeting various requirements such as dimensional accuracy and airtightness. *For more details, please refer to the materials. Feel free to contact us with any inquiries.

• Other Auto Parts
• Contract manufacturing
• Prototype Services

In the manufacturing of industrial motors, industrial switches, industrial electrical equipment, batteries, and electronic components, insulation is an essential requirement. However, we often hear about issues such as difficulties in applying insulation films and tapes in complex shapes or fine grooves, and corrosion (electrolysis) occurring at points where different metals are in contact. Insulating electrodeposition coating can address these issues! So, what kind of performance does electrodeposition coating have in the first place? Furthermore, in what situations can insulating electrodeposition coating be used? This technical document compiles basic knowledge about the technology along with case studies conducted by Okita Manufacturing in the past. ■ Application examples in various scenarios Metal parts for motors Complexly shaped busbars Insulation of metal covers Insulation of metal parts in humid environments (battery mounting parts) Transmission boxes in high humidity Metal items exposed to seawater environments *The textbook on insulating electrodeposition coating can be obtained by downloading the materials.

• Other electronic parts
• Other machine elements
• Other polymer materials

At Daibei Manufacturing, we perform electrostatic insulation coating on metals and conductors such as stainless steel, copper, and aluminum. We use electrostatic coating materials such as "INSULEED" manufactured by Nippon Paint Industrial Coatings. 【Features】 ● Excellent strength and chemical resistance achieved through high-density design of baked curing ● Insulation coating can be applied after part processing, allowing for after-coating of complex shapes ● Reliable insulation treatment for products under 10mm and sharp edge areas ● Usable in a wide range of fields, including electronics and medical sectors 【Commonly Used Locations】 ● Industrial motor manufacturers ● Industrial switch manufacturers ● Industrial electrical equipment ● Battery manufacturers ● Electronic component manufacturers 【Application Examples】 ● Metal parts for motors ● Complex-shaped busbars ● Insulation of metal covers ● Insulation of metal parts exposed to high humidity (battery fixing parts) ● Transmission boxes under high humidity ● Metal products exposed to seawater environments *For more details, please download the PDF or feel free to contact us.

• EMS
• Other electronic parts
• Other machine elements

By using metal sheet press bending and welding instead of expensive molds, we can accommodate both prototype and mass production with short lead times. Despite being a welded structure, the fit with the lid is also good, and since we conduct helium leak tests on all units, the airtightness is guaranteed. We also manage special process certification and traceability according to your requirements. The weldable plate thickness ranges from approximately 0.1 to 2.0 mm, but we mainly handle welded products in the range of 0.2 to 0.8 mm. Additionally, for the welding of safety valves, it is possible even with thicknesses below 0.1 mm.

• Other Auto Parts
• Lithium-ion battery
• Capacitor

By using metal sheet press bending and welding instead of expensive die forming, we can accommodate both prototyping and mass production with short lead times. Despite being a welded structure, the fit with the lid is also good, and since we conduct helium leak tests on all units, the airtightness is guaranteed. We also manage special process certifications and traceability according to your requirements. The weldable plate thickness ranges from approximately 0.1 to 2.0 mm, with the most common being welded products in the range of 0.2 to 0.8 mm. Additionally, welding for safety valves is possible even below 0.1 mm. We also accept welding cases for lithium batteries and capacitors. 【Advantages of Welding and Bending Processing Without Using Dies】 ● Lower costs as expensive dies are not used ● Fast delivery from consultation to delivery since there is no die production ● High quality adopted in aerospace and defense industries * JIS Q 9100 certification obtained (Shimamoto Factory, manufacturing special battery parts for civil aircraft and space) * For more details, please contact us.

• Other Auto Parts
• Lithium-ion battery
• Capacitor

At Daibei Manufacturing, we perform high-precision processing of stainless steel and aluminum cases through welding and bending operations. Thanks to our advanced welding technology, we can achieve reliability comparable to that of press processing. Since we do not use drawing molds, we reduce the costs and time required for production. We can accommodate both prototyping and mass production with short lead times. We have obtained the "JIS Q 9100 certification." We have numerous adoption records in high-quality demanding sectors such as civil aviation and special battery components for space applications. **Advantages of Welding & Bending Processing Without Using Drawing Molds:** - No molds required ⇒ Cost reduction, short lead times, and capability for small lot production such as prototyping - Easy dimension changes - High quality adopted in aerospace and defense industries *JIS Q 9100 certification obtained - We can also accommodate requests for the production of surrounding components and insulation electrocoating. *For an introduction to Daibei's technology and manufacturing examples that demonstrate the strength equivalent to press processing through bending and welding, please refer to the materials.

• Other Auto Parts
• Lithium-ion battery
• Other semiconductor manufacturing equipment

Titanium is recommended for customers considering "lightweight," "compact," and "strength improvement" of battery cases due to its properties. It also has minimal impact on the human body, making it ideal for medical applications. Since we manufacture using metal sheet press bending and welding without expensive die molds, we can accommodate both prototyping and mass production with short lead times. Despite being a welded structure, the fit with the lid is also excellent, and we conduct helium leak tests on all units, ensuring complete airtightness. We can also accommodate special process certification and traceability management according to your requirements. (The weldable plate thickness is approximately 0.1 to 2.0 mm.)

• Other Auto Parts
• Lithium-ion battery
• Capacitor

Our company primarily manufactures battery components, including welding cases, sealing plate assemblies, and peripheral parts. We can comprehensively handle the production and assembly of various components associated with sealing plates, as well as perform airtightness testing. Additionally, we can provide consistent support from the design to the manufacturing of battery cases and lid assemblies. Ohkita Seisakusho, with over 40 years of experience in the manufacturing and sales of specialized battery components for aerospace applications, is here to assist you in realizing your battery development ideas. Furthermore, Ohkita Seisakusho also offers insulated electrodeposition coating. If you have concerns about needing insulation for battery components but find it difficult to apply insulating tape or film due to complex shapes, please feel free to consult us! We will propose and support you from component design and prototyping to insulated coating prototype trials. 【Manufacturing Achievements】 Cases (Aluminum, SUS, Titanium), sealing plates, current collectors, terminals, bus bars, silver chloride plates, safety valve processing, rivet fastening.

• Lithium-ion battery
• Secondary Cells/Batteries
• Electrical equipment parts

At Daibei Manufacturing Co., we obtained JIS Q 9100 certification in September 2015 (Shimamoto Factory, manufacturing special battery components for civil aircraft and aerospace) and are producing special battery components for civil aircraft and aerospace under a high-quality assurance system. The battery components we manufacture are used in civil aircraft, artificial satellites, and rockets, receiving high praise from many customers.

• Lithium-ion battery
• Other Auto Parts
• Other machine elements

Water jet cutting uses the power of water to cut materials, allowing it to cut not only metals such as stainless steel (SUS) and aluminum but also materials like glass, rubber, and plastic. Since it is not affected by heat, it is less likely to cause distortion in the materials, and there are no concerns about melting, burning, discoloration, or the generation of toxic gases. Additionally, the cutting shapes can be freely designed, enabling high-precision cutting of various shapes. The ability to freely design the cutting shapes also improves the yield of the raw materials being cut.

• Other machine elements
• Processing Contract
• Contract manufacturing

The machining equipment at Daibei Manufacturing includes machining centers, wire electrical discharge machines, drill presses, surface grinders, and contour machines (material cutting machines), enabling various metal processing and mold manufacturing. The materials used are mainly aluminum, copper, stainless steel, and steel. In particular, the machining centers focus on complex processing for aerospace components.

• Other Auto Parts
• Contract manufacturing
• Mechanical Design

Silver chloride, used in battery electrodes and other applications, possesses photosensitivity and has high reactivity with other metals, making the production of rolled plates require advanced expertise. Our company consistently handles the entire process in-house, from dissolving and rolling silver chloride to processing it into sheet form, and we can also perform shape punching and bonding with silver. Okita Manufacturing is one of the few manufacturers with 30 years of experience in silver chloride plate production technology.

• Other electronic parts
• Other electric meters
• Other metal materials

Daibei Manufacturing Co., Ltd. conducts assembly processing such as riveting in a semi-clean room equipped with air showers and air filters. We perform various riveting assembly processes, including high-precision riveting of different materials, assembly of metal parts, and assembly processes that require traceability. To minimize the adhesion of fine dust and particles to products during processing, we can carry out processing in a semi-clean room as per your request. In the semi-clean room, we prevent the entry of dust and particles through a double-structured entrance equipped with air filters, air showers, and adhesive mats. A double-structured transfer door is used for the transfer of products in and out of the semi-clean area. Additionally, upon request, we also conduct hardness measurements and tensile tests of metal parts.

• Lithium-ion battery
• Capacitor
• Other Auto Parts

Daibei Manufacturing Co., Ltd. also accommodates small-scale production and specialized pressing processes. We mainly perform metal pressing processing of materials such as aluminum, stainless steel, copper, and steel. - Small-scale prototypes through single pressing - Mass production using progressive presses - Bending processing with brake presses We can handle all of these.

• Other Auto Parts
• Lithium-ion battery
• Capacitor

Daibei Manufacturing has over 30 years of experience in handling silver leaf and has received positive evaluations from our clients. We currently have stock of silver leaf with a thickness of 15 microns. The available widths are: - Approximately 100 mm - Approximately 250 mm We also offer the option to sell cut lengths according to your requirements, so please feel free to contact us.

• Other metal materials
• Other electronic parts
• Other measurement, recording and measuring instruments

Since we manufacture using metal sheet press bending and welding without using expensive molds, we can accommodate both prototyping and mass production with short lead times. Despite being a welded structure, the fit with the lid is also good, and we conduct helium leak tests on all units, ensuring airtightness. We also manage special process certification and traceability according to your requirements. The weldable plate thickness ranges from approximately 0.1 to 2.0 mm, but we primarily handle welded products in the range of 0.2 to 0.8 mm. Additionally, for welding safety valves, it is possible even with thicknesses below 0.1 mm.

• Other Auto Parts
• Lithium-ion battery
• Capacitor