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China Custom 18650 Battery Pack Factory
We are a professional manufacturer of 18650 battery packs, deeply rooted in China’s lithium battery industry. We possess four fully automated spot welding production lines, a high-precision cell grading system, and our independently developed BMS (Battery Management System) solution.
We provide matching cells (Samsung, LG, or domestic Grade A cells), initial protection circuit design, complex series-parallel structure design, and mass production. Our products are widely used in e-Mobility, robotics, solar energy storage systems, and various high-power handheld devices.
High energy density with small size, and lightweight.
Suits -40℃ ~ +80℃ working temprature ranges
The self-discharge rate is approximately 5%.
Custom different cylinder battery in series and parallel combination.
Hongyitai 18650 Rechargeable Battery Pack Products
Hongyitai manufactures and customizes 18650 chargeable battery packs, covering voltages from 3.7V to high voltages of 48V and 72V, with capacities ranging from 2Ah to 100Ah. These modules meet the diverse power requirements of consumer electronics, smart home appliances (cordless vacuum cleaners), power tools, and industrial equipment demanding reliable cycle power.
We use only premium grade-A cells. Each battery module undergoes rigorous capacity grading and internal resistance matching to ensure balanced charging and discharging of the 18650 battery pack, achieving a cycle life of 500+ cycles and avoiding issues such as short battery life and unreliable connections.
18650 10S2P Battery Pack
Nominal voltage: 37V
Nominal capacity: 2Ah
Rated energy: 74Wh
Charge current: ≤2A
Peak discharge current: 10A
Resistance: ≤200mΩ
18650 3S3P Battery Pack
Nominal voltage: 11.1V
Nominal capacity: 6Ah
Rated energy: 66.6Wh
Charge current: ≤2A
Peak discharge current: 12A
Resistance: ≤100mΩ
18650 10S3P Battery Pack
Nominal voltage: 37V
Nominal capacity: 6Ah
Rated energy: 222Wh
Charge current: ≤3A
Peak discharge current: 12A
Resistance: ≤180mΩ
18650 10S4P Battery Pack
Nominal voltage: 37V
Nominal capacity: 10Ah
Rated energy: 370Wh
Charge current: ≤5A
Peak discharge current: 30A
Resistance: ≤350mΩ
18650 3S1P Battery Pack
Nominal voltage: 11.1V
Nominal capacity: 2.5Ah
Rated energy: 27.75Wh
Charge current: ≤2.5A
Peak discharge current: 7.5A
Resistance: ≤180mΩ
18650 2S1P Battery Pack
Nominal voltage: 7.4V
Nominal capacity: 3Ah
Rated energy: 22.2Wh
Charge current: ≤3A
Peak discharge current: 7.5A
Resistance: ≤150mΩ
18650 Lithium Battery Module Features
We possess mature design and manufacturing processes for 18650 Lithium Battery Modules, along with high-precision BMS protection circuits and sheet metal casings, ensuring stable power output for each battery pack under various extreme environments.
High Energy Density: Compared to nickel-cadmium and nickel-metal hydride batteries, the energy density of 18650 lithium batteries is approximately 1.5–2 times that of nickel-metal hydride batteries of the same weight, reaching up to 300 Wh/kg.
High Discharge Rate: Our 18650 cells have a discharge rate of up to 10C to handle instantaneous loads such as motor startup and high-power LEDs.
Reliability: Our modules employ advanced shockproof and impact-resistant frame designs, effectively mitigating impacts during vehicle bumps, drops, or collisions, ensuring a stable power supply.
Multiple Protections: The cells incorporate built-in safety valves and precise protection boards, providing multiple safety protections against overcharge, over-discharge, short circuits, and over-temperature.
Custom 18650 Battery Pack Design for Diverse Applications
We provide 18650 battery pack design services for various industries, offering the optimal cell type and protection board based on your equipment’s power and size. Whether you require extremely high instantaneous discharge current or a 5-year cycle life, we can precisely design the 18650 battery’s capacity, rate capability, and heat dissipation performance. Below are 3 typical applications.
Hongyitai One-Stop 18650 Battery Pack Customization Solutions
Hongyitai boasts a complete custom development process with rapid response. Leveraging our mature supply chain, we provide a technical feasibility report within 24 hours, along with professional technical solutions including an 18650 Battery Pack Diagram and a 3D dimensional model. This reduces the time from concept to market for your new project by 30%. Learn how 18650 lithium battery works.
Premium Cell Selection
We partner with top global brands (Samsung, LG, Panasonic, Sanyo) and leading Chinese Grade A cells, ensuring reliable quality and a stable supply.
Based on your performance specifications and budget, we select the best 18650 cells for you. All cells are guaranteed to be original factory supplies, and their internal resistance and voltage undergo 100% matching testing before warehousing. This eliminates any worries about substandard performance. You can learn 18650 battery full information here.
Professional BMS & Wire Diagram Design
Our team of 10 professional engineers provides independently developed intelligent BMS (Battery Management System) technology and professional wire diagram design services.
Our BMS supports overcharge, over-discharge, overcurrent, short circuit, and equalization charging functions. We support Smart BMS development, integrating Bluetooth or RS485/CAN communication interfaces, allowing your users to easily check battery status on their mobile phones.
Rapid Housing Prototyping & Molding
We offer rapid prototyping and molding capabilities, covering PVC heat shrink film, plastic housings, and metal explosion-proof enclosures. This meets IP65/IP67 protection requirements. We also support custom housing solutions for small order quantities, helping you solve battery securing and waterproofing issues in complex mechanical environments.
Certified 18650 Battery Packs
We provide a full set of international safety standard Certified 18650 Battery Pack certification reports. Our products have successfully passed multiple authoritative tests, including UN38.3, CE, RoHS, IEC62133, and UL, and possess complete compliance reports.
Our battery packs undergo rigorous testing in SGS, TUV, and UL laboratories (high-altitude simulation, high and low temperature cycling, vibration, shock, external short circuit, and heavy object impact) to obtain the necessary certificates and reports, allowing for fast customs clearance and completely eliminating your legal compliance risks.
18650 vs. 21700 Battery Pack: Which is Better for Your Product Assembly?
Based on 10 years of experience in China’s battery manufacturing industry, here is a comparative technical analysis of 18650 and 21700 batteries from different perspectives:
Single Cell Energy Density: 18650 battery approximately 200–250 Wh/kg, 21700 battery 250–300 Wh/kg.
Capacity: 18650 battery: 1800mAh-3500mAh, 21700 battery: 4000mAh-5000mAh.
Cycle Life: Typical cycle life for 18650 and 21700 batteries is similar, approximately 800–1500 cycles.
Physical Dimensions: 18650 battery dimensions: diameter 18 mm, length 65 mm; 21700 battery dimensions: diameter 21 mm, length 70 mm.
Cost: The unit energy cost of the 21700 battery system (approximately 0.155–0.17 USD/kWh) is slightly better than that of the 18650 system.
FAQs for 18650 battery pack
Our sample engineers respond quickly; starting with circuit diagrams and structural design, we complete the production of 18650 battery samples in 3-5 days.
Our factory has a monthly production capacity of hundreds of thousands of 18650 battery packs. The lead time for standard bulk orders is typically 15-20 days, ensuring timely delivery.
We offer a 12-month warranty on all Hongyitai battery packs. We provide free technical support or battery replacement should the damage not be caused by human error.
