What is a Custom 21700 Battery Pack OEM ODM Rechargeable Li-ion Battery?
A custom 21700 battery pack is a specialized, high-capacity, and rechargeable lithium-ion battery designed for specific applications, often provided through OEM or ODM services to meet unique customer requirements.
Introduction to Xiaowei New Energy’s Custom 21700 Battery Pack Services
Xiaowei New Energy specializes in the design and manufacturing of custom 21700 battery packs, offering both OEM and ODM solutions. Our expertise in cylindrical battery production lines ensures that we can deliver high-quality, reliable, and customized battery packs tailored to your specific needs. Whether you require a solution for portable electronics, power tools, or energy storage systems, our team is equipped to provide the best possible product.
Understanding Custom 21700 Battery Packs
A custom 21700 battery pack is a high-performance, rechargeable lithium-ion battery designed to meet specific application requirements. These battery packs are built using 21700 cylindrical cells, which offer a balance of high capacity and compact size. The 21700 format is particularly popular in industries such as portable electronics, power tools, and energy storage systems due to its superior energy density and durability.
Benefits of Custom 21700 Battery Packs
Custom 21700 battery packs offer several advantages over standard off-the-shelf solutions. These include:
- High Capacity: 21700 cells typically have a capacity of 4000-5000 mAh, providing long-lasting power for demanding applications.
- Compact Size: Despite their high capacity, 21700 cells are relatively small, making them ideal for space-constrained devices.
- Customization: OEM and ODM services allow for tailored designs, including specific voltage, current, and protection circuitry requirements.
- Reliability: Integrated Battery Management Systems (BMS) ensure safe and efficient operation, extending the lifespan of the battery pack.
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Item Details Product Name Custom 21700 Battery Pack OEM ODM Rechargeable Li-ion Battery Cell Type 21700 cylindrical lithium-ion cell, 3.7V nominal, typical 4000mAh per cell Customizable Parameters Series / parallel configuration (2S, 3S, 4S, 5S, 6S etc.); capacity tuning; discharge current; connector type; cable length; enclosure material; BMS function OEM Service Standard cell matching, pack assembly, welding, housing molding, label printing based on your existing specifications ODM Service Full custom design: electrical schematic, thermal simulation, mechanical structure, BMS algorithm, prototype testing and mass production Core Advantages High energy density, mature 21700 cell supply chain, flexible pack layout, support high continuous discharge, automated PACK production available Typical Applications E-bikes, power tools, portable power stations, industrial robots, inspection UAV ground equipment, medical portable devices, AGVs Required Custom Inputs Nominal voltage, target capacity, continuous & peak discharge current, dimension constraints, IP rating, connector requirement, working temperature range, certification needs (CE, UN38.3, MSDS) Pack Safety Features Built-in BMS for over-charge, over-discharge, over-current, short circuit and thermal protection; insulation wrapping; pressure relief design; optional thermal sensor Certification Support UN38.3, MSDS, CE, FCC, KC, IEC 62133 (can be applied as per client’s market requirement)
Applications of Custom 21700 Battery Packs
Custom 21700 battery packs find applications in a wide range of industries, including:
- Portable Electronics: Smartphones, tablets, and other mobile devices benefit from the high capacity and compact size of 21700 cells.
- Power Tools: Cordless drills, saws, and other power tools require reliable and high-capacity batteries for extended use.
- Energy Storage Systems: Home and industrial energy storage solutions can utilize 21700 battery packs for efficient and reliable power backup.
Design and Manufacturing Process of Custom 21700 Battery Packs
The design and manufacturing process of custom 21700 battery packs involves several key steps:
- Requirement Analysis: Understanding the specific needs and requirements of the client, including capacity, voltage, and physical dimensions.
- Design Phase: Creating a detailed design, including the selection of 21700 cells and the configuration of the battery pack (series and parallel connections).
- Prototype Development: Building a prototype to test and validate the design, ensuring it meets all specified requirements.
- Production: Mass production of the custom 21770 battery pack, with strict quality control measures in place to ensure consistency and reliability.
- Testing and Certification: Conducting rigorous testing to ensure the battery pack meets all safety and performance standards, including UL, CE, and IEC certifications.
Advantages of Choosing Xiaowei New Energy for Custom 21700 Battery Packs
Xiaowei New Energy offers several advantages for customers seeking custom 21700 battery packs:
- Expertise and Experience: Our team has extensive experience in the design and manufacturing of high-quality battery packs, ensuring that we can deliver the best possible solution.
- State-of-the-Art Facilities: We operate advanced cylindrical battery production lines, allowing us to produce custom 21700 battery packs with precision and efficiency.
- Customization Capabilities: We offer flexible OEM and ODM services, enabling us to tailor our battery packs to meet the unique requirements of each client.
- Quality Assurance: We adhere to the highest quality standards, ensuring that every custom 21700 battery pack we produce is reliable and durable.
Custom 21700 Battery Pack OEM ODM Rechargeable Li-ion Battery FAQS
| No. | Question & Answer |
|---|---|
| Q1 | Q: What is a custom 21700 battery pack OEM & ODM rechargeable li-ion battery?
A: It refers to customized lithium-ion battery packs built with 21700 cylindrical cells. OEM means manufacturing according to customer’s existing drawings and specs; ODM means our team designs the pack scheme, BMS, structure and layout based on customer’s target parameters and application requirements. |
| Q2 | Q: What customization items are available for 21700 battery packs?
A: Nominal voltage, total capacity, series-parallel configuration, discharge rate, BMS protection parameters, cell holder layout, housing material, connector type, cable length, labeling and IP sealing grade. |
| Q3 | Q: What is the difference between OEM and ODM for 21700 battery packs?
A: OEM: customer provides complete design, technical drawings and specs; we only manufacture and assemble. ODM: customer gives functional requirements; we complete cell matching, BMS selection, mechanical design and prototype validation. |
| Q4 | Q: What 21700 cell options can be selected for custom packs?
A: Energy-type or power-type NMC 21700 cells, optional capacity from 4000mAh to 5000mAh. LFP 21700 cells are also available if customers require longer cycle life and better thermal safety. |
| Q5 | Q: What voltage and capacity ranges can be customized for 21700 packs?
A: Voltage can be customized from 3.7V (1S) up to hundreds of volts by series connection. Capacity is adjusted by parallel groups, matching customer’s runtime and load current requirements. |
| Q6 | Q: What BMS customization options are supported?
A: Custom overcharge / overdischarge / overcurrent / temperature protection thresholds, cell balancing function, communication ports such as SMBus / RS485, and different size BMS PCBs to fit limited housing space. |
| Q7 | Q: What applications are custom 21700 OEM ODM packs commonly used for?
A: E-bikes, portable power stations, handheld industrial devices, garden power tools, surveillance systems, medical portable equipment, robots and outdoor energy storage devices. |
| Q8 | Q: What documents do customers need to provide to start an ODM 21700 battery pack project?
A: Target voltage, capacity, continuous & peak discharge current, working temperature range, dimension limits, connector requirements, certification requirements and target application details. |
| Q9 | Q: What is the general development workflow for ODM custom 21700 packs?
A: Requirement confirmation → scheme design → 3D drawing → prototype production → performance testing → certification application → small batch trial → mass production. |
| Q10 | Q: What is the typical MOQ for OEM and ODM custom 21700 battery packs?
A: ODM usually has higher MOQ due to mold and tooling cost. OEM can accept smaller batches for standard modified packs. MOQ varies based on housing mold, BMS customization and cell specs. |
| Q11 | Q: Can custom 21700 packs support different discharge rates?
A: Yes. We can select low-rate energy cells for long standby, or high power 21700 cells for high continuous/peak discharge, matching your equipment load demands. |
| Q12 | Q: What certifications can be applied for custom 21700 battery packs?
A: UN38.3, IEC62619, CE. For EU market, we can prepare data for battery passport and ESG raw material traceability to meet EU battery regulations. |
| Q13 | Q: Is cell sorting still required for custom 21700 packs?
A: Yes. Regardless of OEM or ODM orders, cells must be screened and grouped by OCV, internal resistance and capacity to guarantee pack consistency and cycle life. |
| Q14 | Q: What housing options are available for custom 21700 packs?
A: Plastic ABS housing, aluminum metal housing, or no housing bare pack. Custom shape, color, logo printing and IP sealing treatment can be offered. |
| Q15 | Q: What welding methods are used in custom 21700 pack assembly?
A: Resistance spot welding as standard for nickel strips. Ultrasonic metal welding is adopted for high-current customized packs with thick copper busbars. |
| Q16 | Q: What tests will be performed on custom 21700 prototypes before mass production?
A: OCV & internal resistance test, charge-discharge capacity test, protection function verification, thermal cycling test, insulation and hipot test, vibration and drop test. |
| Q17 | Q: What are the main advantages of custom 21700 OEM ODM battery packs?
A: Tailored dimensions and electrical parameters to fit your equipment, flexible BMS function configuration, brand logo customization, optimized cost-performance for your target application. |
| Q18 | Q: What are the limitations of custom 21700 battery packs?
A: ODM projects need mold development, longer lead time and non-recurring engineering cost. Small batch custom orders usually have higher unit price compared with standard ready-made packs. |
| Q19 | Q: Can custom 21700 packs be manufactured on semi-automatic or fully automatic production lines?
A: Yes. Semi-automatic lines suit small & medium custom batches. Fully automatic lines are used for large-volume OEM mass orders with fixed pack design. |
| Q20 | Q: What after-sales support is available for OEM / ODM 21700 battery packs?
A: Production technical documentation, test reports, certification files, production process traceability, and technical support for troubleshooting of finished battery packs. |
Conclusion
Custom 21700 battery packs are a versatile and high-performance solution for a wide range of applications, from portable electronics to power tools and energy storage systems. By choosing Xiaowei New Energy for your custom 21700 battery pack needs, you can be assured of receiving a high-quality, reliable, and tailored solution that meets your specific requirements. Our expertise in cylindrical battery production lines and commitment to excellence make us the ideal partner for your custom battery pack projects.
