What Sungwoo does

Sungwoo (성우) is a Korean precision press manufacturer founded in September 1992 that designs, develops, and produces safety-critical components for two end markets: cylindrical lithium-ion batteries and automotive electrical systems. The company's flagship product is the Top Cap Assembly, a safety component installed at the top of cylindrical batteries (18650, 21700, and the newer 46-series formats) that uses a CID (Current Interrupt Device) mechanism to cut off current and vent internal pressure when abnormal temperature or pressure thresholds are exceeded, preventing thermal runaway and fire. Beyond battery caps, Sungwoo manufactures precision press-formed automotive parts including EPS motor bearing plates, EOP yokes, EV relay parts, IDB yokes, motor housings, MOC yokes, blower motor yokes, and EWP yokes, plus hydrogen fuel cell stack cathodes for Hyundai Motor Company and smartphone camera module sub-assemblies.

The company operates three manufacturing sites: its headquarters and primary plant in Gumi, South Korea (including the new 28,100 sqm Gumi 5th Industrial Complex plant that houses dedicated 46-series battery component production lines), an automotive electrical parts plant in Cheonan, and a secondary battery Top Cap Assembly facility in Nanjing, China. A wholly-owned Huizhou subsidiary and a Chinese injection molding joint venture (Rubin Electronics) extend the operational footprint. Forward expansion includes a US$18.5 million inaugural North American manufacturing operation in Monterrey, Nuevo León, Mexico to serve nearshoring-driven USMCA-compliant demand.

Sungwoo generates revenue through B2B hardware sales under enterprise supply contracts with Tier-1 battery makers and automotive OEMs, with no public pricing and quote-based engagement. The principal customer relationship is with LG Energy Solution, for which Sungwoo serves as a primary Tier-1 Top Cap Assembly vendor, completed exclusive development of the 4680 top cap, and was named 2023 Quality Improvement Excellent Partner. The company listed on KOSDAQ in 2024 (symbol 458650) with Korea Investment Securities as lead underwriter, and reported 2023 consolidated revenue of 146.6 billion KRW (~US$108M) and operating profit of 28.9 billion KRW, reflecting a 33% five-year revenue CAGR (2019-2024).

Name

Sungwoo

Legal name

(주)성우

Website

https://e-sungwoo.co.kr

Company type

Private

Founded year

1992

Operating status

Operating

Short description

Sungwoo (성우) is a Korean precision press manufacturer founded 1992, producing Top Cap Assembly safety components for cylindrical lithium-ion batteries and automotive electrical parts, supplying Tier-1 battery makers (notably LG Energy Solution) and automakers from facilities in Korea, China, and Mexico.

Ownership category

akta.pro rank

Product category

Precision Press-Manufactured Battery and Automotive Components

NAICS

Battery Manufacturing (335910), Motor Vehicle Electrical and Electronic Equipment Manufacturing (336320), Other Electronic Component Manufacturing (334419)

SIC

Electronic Components & Accessories (3670)

akta.pro primary industry

Battery Pack Manufacturing & Module Assembly (EUAFABAI)

akta.pro secondary industry

Passenger Vehicle Electrical & Electronics Manufacturing (ICE) (IMACAAAK)

Keywords

• Cylindrical battery components
• Precision press manufacturing
• Automotive electrical parts
• Top cap assemblies
• Battery safety components

Headquarters

HQ city

Simidong

HQ country

South Korea

HQ region

Asia

Offices5 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Secondary Battery Parts: Manufacture and sale of Top Cap Assembly and press parts for cylindrical batteries used in smartphones, power tools, e-bikes, EVs, ESS, and IoT devices. Revenue derived from high-volume component supply contracts with tier-1 battery makers.
2. Automotive Electrical Parts: Production of automotive electronic components including motor housing, EV relay parts, EPS bearing plates, EOP yokes, and IDB yokes for EVs.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Sungwoo manufactures and sells precision press-formed components in two divisions: (1) Secondary Battery Parts, led by Top Cap Assembly safety devices for cylindrical lithium-ion batteries (18650, 21700, 46-series formats used in smartphones, power tools, e-bikes, EVs, ESS, and IoT devices); and (2) Automotive Electrical Components, including motor housings, EPS bearing plates, EV relay parts, EOP/EWP/MOC/IDB/blower motor yokes, hydrogen fuel cell stack cathodes, and smartphone camera module sub-assemblies. Operating from Korean and Chinese production facilities, the company supplies Tier-1 battery makers (LG Energy Solution) and automotive OEMs as a Tier-1 vendor.

Product overview

SUNGWOO is a precision press manufacturing company established in 1992, operating two core business divisions: Secondary Battery Parts and Automotive Electrical Components/ESS Parts. The company's flagship product is the Top Cap Assembly, a critical safety component for cylindrical batteries that prevents fire and explosion. The Secondary Battery Parts division produces Top-Cap Assemblies for 18650, 21700, and 46-series models, along with press components for power tools, e-bikes, EVs, ESS, and IoT devices. The Automotive Electrical Components division manufactures EPS Motor Bearing Plates, EOP Yokes, EV Relay Parts, IDB Yokes, Motor Housings, and various other precision press parts for vehicle systems. The company also produces hydrogen fuel cell Stack Cathodes and smartphone camera module assemblies. SUNGWOO operates manufacturing facilities in Gumi (headquarters), Cheonan, and Nanjing, China, with plans for North American production expansion.

Differentiator

Problem solved

Functional benefit

Products and services

• Top Cap Assembly (탑 캡 어셈블리) for cylindrical batteries Safety device component located at the top of cylindrical lithium-ion batteries that prevents fire and explosion by interrupting current when abnormal temperature or pressure occurs (via CID technology), then vents internal pressure to prevent thermal runaway. Core product supplied to Tier-1 battery manufacturers including LG Energy Solution.
• 46-Series (46mm) Battery Component Production Line Next-generation 4680 cylindrical battery safety components (Top Cap Assembly and press parts) with 5x energy density and 6x power improvement versus the 2170 format. Targeted at Tier-1 battery makers adopting next-generation large-format cylindrical cells for EVs and ESS.
• 21700 Model Top-Cap Assembly Top-Cap Assembly for 21700 model cylindrical secondary batteries, serving as a safety component for mass-market cylindrical battery applications including power tools, e-bikes, EVs, and ESS.
• 18650 Model Top-Cap Assembly Top-Cap Assembly for 18650 model cylindrical secondary batteries, a standard-format battery safety component for power tools, IoT devices, consumer electronics, and portable applications.
• Motor Housing Motor housing that forms the outer structure of drive motors, protecting internal motor components in EV and electrified powertrain applications.
• EPS Motor (Electric Power Steering) Bearing Plate Bearing plate for Electric Power Steering (EPS) motors, part of automotive electrical components supplied to OEMs and Tier-1s.
• EV Relay Parts Precision press components for EV relay systems managing battery current supply and interruption functions in electric vehicles.
• IDB (Integrated Dynamic Brake) Yoke Yoke component for Integrated Dynamic Brake (IDB) systems, a safety-critical automotive component for advanced braking applications.
• EOP (Electric Oil Pump) Yoke Yoke for Electric Oil Pump (EOP) applications in automotive transmission and lubrication systems.
• EWP (Electric-Water Pump) Yoke Yoke for Electric-Water Pump (EWP) applications in vehicle cooling systems.
• MOC (Motor on Caliper) Yoke Motor on Caliper (MOC) yoke developed for advanced automotive braking-by-wire systems.
• Blower Motor Yoke Yoke developed for automotive HVAC blower motor applications.
• Hydrogen Fuel Cell Stack Cathode Stack cathode components for hydrogen fuel cell electric vehicles, supplied to Hyundai Motor Company (HMC) for next-generation hydrogen mobility applications.
• Smartphone Camera Module Press and Sub-Assembly Components Ultra-precision press components and sub-assemblies for smartphone camera modules supplied to electronics manufacturers.

Quantifiable outcome

• Selected as LG Energy Solution Quality Improvement Excellent Partner (품질개선 우수파트너) in 2023
• +1 more outcomes

Named customers1 record

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• Government of Nuevo León / State of Nuevo León, MexicocoreStrategic or Co-development Partner · 26 June 2026Sungwoo Corp. is establishing its first North American manufacturing operation in Monterrey, Nuevo León, Mexico with an US$18.5 million investment, as part of South Korean manufacturers expanding supplier integration in the state following US$340 million in newly formalized investments to strengthen Nuevo León's position as a North American automotive and advanced manufacturing hub amid nearshoring trends. The initiative aims to increase Mexican SME participation in global supply chains while meeting USMCA regional content requirements.

Scale indicators7 records

Recent moves10 records

Expansion highlights6 records

Direct peers

• JTEKT Corporation: Japanese manufacturer specializing in steering systems, bearings, and drivetrain components for the automotive industry. Overlaps with Sungwoo's EPS bearing plates and motor housing/yoke products on both passenger vehicle applications and EV programs.
• Hyundai Mobis: Korea's largest automotive parts manufacturer and the dominant domestic supplier of automotive electrical components including EPS systems, motor housings, and EV powertrain electronics. Directly comparable to Sungwoo's automotive electrical parts business and serves overlapping Korean OEM customers.
• Tokai Rika: Japanese Tier-1 automotive parts supplier specializing in switches, sensors, meters, and electronic control units. Highly comparable to Sungwoo's automotive electrical parts division in customer type (Japanese/Korean OEMs) and product category (precision press and electronic subassemblies).
• Tatsuta Electric Wire & Cable: Japanese manufacturer of precision components including current-collecting tabs, safety components, and wiring/cable assemblies for cylindrical lithium-ion batteries. Direct overlap with Sungwoo's Top Cap Assembly / battery press components business across lithium-ion cell formats.
• LS Automotive: Subsidiary of LS Electric (former LS Industrial Systems, where Sungwoo's CEO Park Jong Heon previously worked). Manufactures automotive electrical and electronic components including motors, sensors, and EV-related parts, making it a structurally similar Korean automotive electrical component peer.

Broad incumbents

• Eaton Corporation: Global power management company with a battery management and circuit protection portfolio including fuses, CID devices, and EV battery safety components. Operates at the upper end of the battery safety component category that Sungwoo serves with its Top Cap Assembly.
• Resonac (formerly Showa Denko): Japanese electronic materials company supplying battery anode/cathode materials, hard disk substrates, and specialty components. Operates in the same battery-component supply chain adjacency as Sungwoo with material science and processing technology expertise for cylindrical cells.
• Mitsubishi Electric: Global Tier-1 electronics and automation company with overlapping capabilities in automotive electronics, EV power components, and battery-related subassemblies. Much larger scale but competes for similar battery and automotive electrical component wallet share as Sungwoo.

Emerging players

• KYB Corporation: Japanese hydraulic and precision components supplier producing automotive steering, suspension, and braking system components. Comparable product overlap with Sungwoo's EOP, IDB, and motor-on-caliper yoke parts for EV braking and steering systems.
• Wurth Elektronik: German manufacturer of electronic and electromechanical components used in power electronics, battery management systems, and industrial applications. Comparable as a precision electronic component supplier serving battery and EV electronics manufacturers across multiple geographies.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sungwoo