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Any spec —
let’s talk first

From battery pack requirements to business collaboration — choose an inquiry type below.

Fill in only what you know. If an item is unclear or undecided, leave it blank and tick “Needs consultation” beside it — our team will define it together with you.

Basic information

Company, contact, email and phone are required. Fill in the rest as far as you know — tick "needs consultation" if unsure.

Official company name

Reachable point of contact

Email address for our reply

Phone or mobile number

Project name for the battery pack (internal code is fine)

Prototype qty / initial mass-production qty / annual qty

Pick the desired prototype delivery date

Pick the desired mass-production start date

Approximate budget ceiling (optional)

USD
Application & usageHelps us understand the end use and operating environment.

e.g. EV, drone, medical device, ESS, portable device

Specific product or system the pack goes into (e.g. e-scooter model XYZ)

Typical usage pattern (e.g. 8h/day continuous, charge 5×/week, outdoor)

Required cycle life (e.g. 500+ cycles at 80% capacity)

Temp (e.g. -20–60°C) / humidity (e.g. 0–95% RH) / vibration & shock (e.g. MIL-STD-810)

Ingress rating (e.g. IP67), high-altitude/low-pressure, chemical exposure (e.g. salt spray)

Electrical requirementsCore performance: capacity, power, charge/discharge.

Choose your preferred battery type

e.g. Samsung, LG

Series/parallel layout (e.g. 13S4P)

Nominal (e.g. 48V) / operating range (e.g. 36–54V)

Nominal (e.g. 10Ah) / min–max range (e.g. 20–90%)

Max continuous discharge (e.g. 20A) / peak (e.g. 50A for 10s)

Charge V/I (e.g. CC-CV, 12V) / charge time (e.g. 80% in 2h)

Cut-off voltage (e.g. 3.0V/cell) / discharge mode (e.g. pulse)

Required energy density (e.g. 200Wh/kg+)

BMS requirementsBMS features that manage safety and performance.

Over-charge/discharge, over-current, short-circuit protection, temp monitoring

SOC estimation, SOH monitoring

CAN, RS485, UART, Bluetooth, LTE, etc.

Event/error logging, remote monitoring

LED, buzzer, external signal output

UL, CE, IEC 62133 compliance

Special needs (e.g. GPS, AI predictive maintenance)

Mechanical designPhysical form and durability. CAD files take priority if provided.

L×W×H (e.g. 200×100×50mm) / tolerance

Max allowable weight (e.g. ≤20kg)

Material (e.g. aluminium, plastic), finish, colour

Charge/discharge port type (e.g. XT60, USB-C), wiring length

Fixing method (e.g. bolt mount, clip), vibration tolerance

Cooling (e.g. air, liquid), heatsink needs

IP rating (e.g. IP65), shock tolerance (e.g. 50G)

Safety & complianceItems for regulatory and safety compliance.

UN38.3 (transport), IEC 62619 (ESS), UL 1642 (cell), UL 2271 (pack)

RoHS, REACH, CE marking, etc.

Drop, vibration, thermal-shock tests, etc.

Fire prevention (e.g. auto-extinguish), emergency shutdown

Other requirements

Low-cost priority vs. high-performance priority

Prototype count (e.g. 5), pre-production test items

Drawing sharing, NDA requirements

Any other requirements or constraints

Attachments

Attach spec sheets, drawings or reference photos. Up to 5MB total, multiple files allowed.

Consent to the collection and use of personal information

CTNS Co., Ltd. collects and uses personal information as below, for responding to and consulting on your inquiry.

  • Items: company, contact name & title, email, phone, inquiry (requirements) content and attachments
  • Purpose: reviewing and replying to the inquiry/requirements, and consultation
  • Retention: kept for 1 year after the inquiry is handled, then destroyed (or until any legally required period)

You may decline consent; declining may limit our ability to process your inquiry.

Locations

Please contact us before visiting.

  • Changwon HQ

    경남 창원시 의창구 평산로 23, 신화테크노밸리 639~641호

  • Busan R&D center

    부산 북구 효열로 111, 부산지식산업센터 107호 · Tel 1551-2995

  • Seoul office

    서울 강남구 테헤란로 151, 역삼하이츠빌딩 4층 413호

  • Seattle US subsidiary

    Seattle, WA, USA

Partnership and investment inquiries

If you are interested in business collaboration, technology partnerships, or investment opportunities, select the appropriate inquiry type in the form above. A member of our team will respond directly.