Custom Battery Partner for Emergency Lighting & Industrial OEMs:
Not the Biggest, Just the Most Dedicated.
Trusted by mid-sized brands for high-reliability NiCd, Li-ion, and LiFePO4 packs. We provide the engineering precision and certification support (UL/CB) that industry giants often overlook.
Led by 27 Years of Battery Engineering Expertise
Our leadership team brings decades of specialized experience in electrochemistry, industrial manufacturing, and global supply chain management. We built this company to solve the reliability issues we saw plaguing the industry.
While the vision starts with engineering, executing it at an industrial scale requires a seasoned leadership team with over 70+ years of combined manufacturing wisdom.
"We don't just build batteries; we architect the lifeblood of your critical systems. Every cell is a promise of performance."
— Julio Liang, co-Founder & Global Strategy Director
Mr. Tinghui Zhang
G.M. & Procurement, co-Founder
- Veteran: 27+ years.
- Network: Ronda tenure.
- Strategy: Top materials.
Leverages deep-rooted industry relationships to secure priority access to top-tier raw materials, guaranteeing absolute cell consistency. By actively managing our upstream supply chain, he ensures TSJ Sanjun maintains cost-efficiency and uninterrupted production even during global material shortages.
Mr. Julio (Yuxun) Liang
Global Strategy Director, co-Founder
- Expert: Li-ion pioneer.
- Vision: Stable chemistry.
- Compliance: Global export.
Founded TSJ Sanjun to bridge the gap between complex engineering and global compliance, providing mid-sized brands with top-tier technical support. His deep understanding of international safety standards ensures every custom battery pack is engineered for seamless global export and long-term reliability.
Mr. Guanfei Luo
Domestic Sales Director, co-Founder
- Market: Deep expertise.
- Leader: OEM projects.
- Agile: Fast prototyping.
Operates within China’s ultra-competitive hub to ensure every custom BMS and cell configuration TSJ Sanjun develops is rigorously battle-tested. He transforms intricate client requirements into mass-produced realities, pushing our team to achieve industry-leading turnaround times for complex OEM projects.
Three Specialized Facilities.
One Unified Standard.
Geographically distributed to leverage regional manufacturing strengths, yet uniformly managed to guarantee identical performance and industrial-grade consistency globally.
Jiangmen, Guangdong Province HQ
R&D, Pack Assembly & OEM Management
The nerve center of our operations. Dedicated to custom battery pack assembly, smart BMS integration, rigorous OQC testing, and seamlessly coordinating global OEM/ODM projects.
Huaibei, Anhui Province Facility
Li-ion & LiFePO4 Cell Production
Highly automated lines specialized in Lithium-ion (NCM) and LiFePO4 cylindrical cells (e.g., 14500, 18650, 26650). Optimized for power tools, small appliances, and energy storage.
Changde, Hunan Province Facility
NiCd & NiMH Cell Production
Focused on engineering robust NiCd and NiMH cylindrical cells. Specifically designed for high-temperature emergency lighting and demanding industrial environments requiring extreme durability.
Uncompromising Precision Lab
Quality isn't inspected at the end; it is engineered into the beginning. Our industry-leading in-house testing facilities cover everything from upstream raw material particle analysis to extreme environmental safety tests.
- Material & Dimensional Precision: Utilizing Particle Size Analyzers, 2D Measuring Machines, and Laser Thickness Gauges to ensure raw material purity and 0.5mm zero-tolerance assembly fit.
- Chemical Stability Control: Employing Karl Fischer Moisture Testers and Precision Electronic Scales to strictly control internal moisture at the ppm level, preventing cell swelling.
- Electrical Safety & Matching: 100% automated sorting and testing via Insulation Resistance Testers to guarantee short-circuit prevention and stable discharge curves.
- Lifecycle & Abuse Validation: Our dedicated Cycle Laboratory and Safety Test Laboratory subject cells to extreme endurance tests, validating long-term reliability and UN38.3/UL compliance.
GLOBALLY RECOGNIZED STANDARDS