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Original R&D Achievement

Original Core Technology Breakthrough

SUNHE independently developed 5 pioneering core technologies to break industry technical monopoly, widely applied in curved, ultra-thin, special-shaped custom lithium polymer battery manufacturing.

Full-Temp Self-developed Electrolyte Tech

Break the limit of conventional electrolyte’s narrow working range, expand stable operating temperature from -40℃~+60℃. Realize over72% capacity retention under minus 40℃ environment, solve low-temperature power drop trouble for wearable & medical batteries.

Special-shaped Cell Integral Forming

Domestic original one-step molding process for curved & irregular LiPo cells, eliminate secondary cutting waste, reduce 18% production cost, realize ultra-narrow edge sealing below 0.25mm for smart ring curved battery.

LiHv High Voltage Cathode Modification

Independent modified coating formula for 4.2V~4.52V high energy density cells, lift single cell energy density by 27% vs ordinary LCO material, core tech of our high-voltage customized battery series.

Ultra-thin Dry Coating Electrode Tech

Patented dry electrode coating solves ultra-thin pole piece cracking & uneven coating bottleneck, support cell thickness down to 0.3mm, core manufacturing tech for ultra-thin wearable lithium battery.

Low-expansion Modified Laminated Film Tech

Break Japan & Korea imported aluminum plastic film monopoly, self-modified composite material reduce cell swelling rate below 2.2% after 500 cycles, solve soft package bulking industry pain point.

Bottleneck Breakthrough

Manufacturing Preparation Bottleneck Breakthrough

Target six core industry manufacturing pain points, SUNHE’s customized process overcome long-existing production technical bottlenecks of custom Li-Po battery industry.

Ultra-thin cell sealing leakage bottleneck
Adopt segmented temperature-controlled hot pressing process, solve micro leakage for below 0.4mm ultra-thin cell sealing, leakage rate drop from 8.7% to under 0.3%.
Irregular cell alignment lamination difficulty
Custom modular positioning fixture + visual alignment system, realize automatic lamination for random curved special-shaped cells.
High-rate cell lithium precipitation failure
Gradient compaction pole piece process optimize lithium ion transmission path, restrain dendrite precipitation under 5C high fast charging condition.

Batch consistency of multi-spec custom cells
Full-process digital parameter locking system, control capacity tolerance within ±2.5% for different customized size mass production.
Medical grade low self-discharge bottleneck
Ultra-high purity electrolyte purification technology, monthly self-discharge rate ≤1.8%, fully meet long-term standby demand of implant & portable medical equipment.
Round LiPo rolling forming crack issue
Multi-stage gradual rolling warm forming process eliminate shell crack, realize stable mass production of circular soft pack lithium battery.

Full Chain Service

All-Round Technical Supporting Services

From early-stage R&D simulation to post-sale cycle testing, one-stop technical support for client customized battery projects.

Pre-project Simulation Design

3D structural simulation, electrochemistry parameter pre-calculation, free preliminary scheme optimization before prototype production.

Small Batch Sample R&D

Quick prototype trial production within 3~7 working days, adjust formula & structure according to client test feedback.

Process Mass Production Tuning

Production line parameter debugging, fixture customization, stable transition from small sample to bulk production.

Whole-life Cycle Testing

UN38.3, UL, CE, high-low temp aging & cycle reliability test, assist customer certification application.

By The Numbers

Core Technical Achievement Data

Quantifiable technical indicators after years of R&D breakthrough

42+

Core Invention Patents

-40℃~60℃

Stable Working Temp Range

0.3mm

Minimum Ultra-thin Cell Thickness

27%

Max Energy Density Promotion

R&D Lab & Equipment

Advanced R&D Test Center

Electrochemical Comprehensive Test Cabinet

High & Low Temperature Alternate Test Chamber

Cell Puncture & Extrusion Safety Tester

SUNHE’s R&D center is equipped with full set international advanced testing apparatus, all performance verification follow ISO & IEC standard, support independent reliability certification test for all customized lithium battery products.

Technique Services