Custom Battery Pack
Hongyitai is your premium customer battery designer and battery pack manufacturer from custom battery packs, BMS circuit and chargers.
Custom BMS & Circuits
We are able to design required protection circuit modules, fuel gauging and other controllers.
Structure Design
Store battery packs into ABS or metal containers with waterproof and protective features.
Rapid Prototyping
Battery prototyping and samples can be ready within 7 days after evaluation.
UN38.3 & Safety Testing
All production procedures are under UN38.3 and IEC62133 testing standards.
Battery Pack types we assembly
Hongyitai has designed and assembled custom rechargeable battery packs for various OEM devices and projects since 2014. We provide battery packs in NCM, lifepo4, and other chemistries and for whole power core. From energy storage, RV, marine, AGV, golf carts to lighting systems, we can produce and deliver excellent batteries for your requirements. Below are 4 main battery product for your review.
3V CR2032 Coin Cell Battery
Nominal voltage: 3V
Nominal capacity: 210mAh
Rated energy: 0.63Wh
Max Continue Current: 3mA
Weight: 3g
Size: 20.0*3.2mm
Temperature: -40~85℃
3V CR2450 Coin Cell Battery
Nominal voltage: 3V
Nominal capacity: 600mAh
Rated energy: 1.8Wh
Max Continue Current: 3mA
Weight: 6.4g
Size: 24.5*5.0mm
Temperature: -40~85℃
3V CR2025 Coin Battery
Nominal voltage: 3V
Nominal capacity: 150mAh
Rated energy: 0.45Wh
Max Continue Current: 3mA
Weight: 2.5g
Size: 20.0*2.5mm
Temperature: -40~85℃
21700 1S1P 3.7V 5Ah Battery
Nominal voltage: 3.7V
Nominal capacity: 5000mAh
Rated energy: 18.5Wh
Charge current: 1.0C rate
Discharge current: 3.0C rate
Diameter: ≤21mm
Length: ≤72.0mm
21700 2S1P 7.4V 5Ah Battery
Nominal voltage: 7.4V
Nominal capacity: 5000mAh
Rated energy: 37Wh
Charge current: 1.0C rate
Discharge current: 3.0C rate
Thickness: ≤22.0mm
Width: ≤44mm
Length: ≤72.0mm
26650 1S1P 3.2V 4000mAh Battery
Nominal voltage: 3.2V
Nominal capacity: 4Ah
Rated energy: 12.8Wh
Charge current: 1.0C rate
Discharge current: 1.0C rate
Diameter: ≤28mm
Length: ≤68.0mm
26650 1S1P 3.2V 5000mAh Battery
Nominal voltage: 3.2V
Nominal capacity: 5000mAh
Rated energy: 16Wh
Charge current: 1.0C rate
Discharge current: 1.0C rate
Diameter: ≤28.0mm
Length: ≤68.0mm
26650 1S1P 3.2V 6000mAh Battery
Nominal voltage: 3.2V
Nominal capacity: 6000mAh
Rated energy: 19.2Wh
Charge current: 1.0C rate
Discharge current: 1.0C rate
Diameter: ≤28.0mm
Length: ≤68.0mm
26650 1S2P 3.2V 8000mAh Battery
Nominal voltage: 3.2V
Nominal capacity: 8000mAh
Rated energy: 25.6Wh
Charge current: 1.0C rate
Discharge current: 1.0C rate
Thickness: ≤28mm
Diameter: ≤54.0mm
Length: ≤68.0mm
26650 4S2P 12.8V 8800mAh Battery
Nominal voltage: 12.8V
Nominal capacity: 8800mAh
Rated energy: 112.64Wh
Charge current: 1.0C rate
Discharge current: 1.0C rate
Thickness: ≤54mm
Width: ≤67mm
Length: ≤117.0mm
26650 1S2P 3.2V 10000mAh Battery
Nominal voltage: 3.2V
Nominal capacity: 10000mAh
Rated energy: 32Wh
Charge current: 1.0C rate
Discharge current: 2.0C rate
Thickness: ≤26.0mm
Width: ≤54.0mm
Length: ≤68.0mm
18650 1S1P 3.7V 2Ah Battery
Nominal voltage: 3.7V
Nominal capacity: 2000mAh
Rated energy: 7.4Wh
Charge current: 3.0C rate
Discharge current: 1.0C rate
Diameter: ≤19mm
Length: ≤68.0mm
18650 1S1P 3.7V 1800mAh Battery
Nominal voltage: 3.7V
Nominal capacity: 1800mAh
Rated energy: 6.66Wh
Charge current: 1.0C rate
Discharge current: 1.0C rate
Diameter: ≤19.0mm
Length: ≤68.0mm
18650 1S1P 3.7V 2500mAh Battery
Nominal voltage: 3.7V
Nominal capacity: 2500mAh
Rated energy: 9.25Wh
Charge current: 2.0C rate
Discharge current: 1.0C rate
Diameter: ≤19.0mm
Length: ≤68.0mm
18650 1S1P 3.7V 2600mAh Battery
Nominal voltage: 3.7V
Nominal capacity: 2600mAh
Rated energy: 9.62Wh
Charge current: 1.0C rate
Discharge current: 3.0C rate
Diameter: ≤19.0mm
Length: ≤68.0mm
18650 1S1P 3.7V 3000mAh Battery
Nominal voltage: 3.7V
Nominal capacity: 3000mAh
Rated energy: 11.1Wh
Charge current: 1.0C rate
Discharge current: 3.0C rate
Diameter: ≤19mm
Length: ≤68.0mm
18650 1S1P 3.7V 3500mAh Battery
Nominal voltage: 3.7V
Nominal capacity: 3500mAh
Rated energy: 12.95Wh
Charge current: 1.0C rate
Discharge current: 2.0C rate
Diameter: ≤19.0mm
Length: ≤68.0mm
18650 2S1P 7.4V 2000mAh Battery
Nominal voltage: 7.4V
Nominal capacity: 2000mAh
Rated energy: 14.8Wh
Charge current: 1.0C rate
Discharge current: 3.0C rate
Thickness: ≤19.0mm
Width: ≤38.0mm
Length: ≤68.0mm
18650 2S2P 7.4V 4000mAh Battery
Nominal voltage: 7.4V
Nominal capacity: 4000mAh
Rated energy: 29.6Wh
Charge current: 1.0C rate
Discharge current: 3.0C rate
Thickness: ≤38.0mm
Width: ≤38.0mm
Length: ≤68.0mm
18650 2S3P 7.4V 6000mAh Battery
Nominal voltage: 7.4V
Nominal capacity: 6000mAh
Rated energy: 44.4Wh
Charge current: 1.0C rate
Discharge current: 2.0C rate
Thickness: ≤38mm
Diameter: ≤56mm
Length: ≤68.0mm
18650 2S9P 7.4V 22.5Ah Battery
Nominal voltage: 7.4V
Nominal capacity: 22.5Ah
Rated energy: 166.5Wh
Charge current: 1.0C rate
Discharge current: 2.0C rate
Thickness: ≤56mm
Width: ≤110mm
Length: ≤68.0mm
18650 3S1P 11.1V 2500mAh Battery
Nominal voltage: 11.1V
Nominal capacity: 2500mAh
Rated energy: 27.75Wh
Charge current: 1.0C rate
Discharge current: 3.0C rate
Thickness: ≤34.0mm
Width: ≤38.0mm
Length: ≤68.0mm
18650 3S2P 7.4V 5200mAh Battery
Nominal voltage: 11.1V
Nominal capacity: 5200mAh
Rated energy: 57.72Wh
Charge current: 1.0C rate
Discharge current: 1.0C rate
Thickness: ≤38.0mm
Width: ≤56.0mm
Length: ≤68.0mm
18650 3S4P 11.1V 10Ah Battery
Nominal voltage: 11.1V
Nominal capacity: 10Ah
Rated energy: 111Wh
Charge current: 1.0C rate
Discharge current: 2.0C rate
Thickness: ≤56mm
Width: ≤75mm
Length: ≤68.0mm
18650 4S1P 14.8V 2Ah Battery
Nominal voltage: 14.8V
Nominal capacity: 2Ah
Rated energy: 29.6Wh
Charge current: 1.0C rate
Discharge current: 3.0C rate
Thickness: ≤19mm
Width: ≤76mm
Length: ≤68.0mm
18650 4S2P 14.8V 4.0h Battery
Nominal voltage: 14.8V
Nominal capacity: 4Ah
Rated energy: 59.2Wh
Charge current: 1.0C rate
Discharge current: 3.0C rate
Thickness: ≤38.0mm
Width: ≤76.0mm
Length: ≤68.0mm
18650 4S4P 12.8V 10Ah Battery
Nominal voltage: 14.8V
Nominal capacity: 10Ah
Rated energy: 148Wh
Charge current: 1.0C rate
Discharge current: 1.0C rate
Thickness: ≤76.0mm
Width: ≤76.0mm
Length: ≤68.0mm
18650 6S2P 22.2V 5.2Ah Battery
Nominal voltage: 22.2V
Nominal capacity: 5Ah
Rated energy: 111Wh
Charge current: 1.0C rate
Discharge current: 3.0C rate
Thickness: ≤38mm
Width: ≤68mm
Length: ≤112.0mm
18650 7S2P 25.9V 4Ah Battery
Nominal voltage: 25.9V
Nominal capacity: 4Ah
Rated energy: 103.6Wh
Charge current: 1.0C rate
Discharge current: 3.0C rate
Thickness: ≤38mm
Width: ≤68mm
Length: ≤130.0mm
18650 10S4P 36V 10.4Ah Battery
Nominal voltage: 36V
Nominal capacity: 10.4Ah
Rated energy: 374.4Wh
Charge current: 1.0C rate
Discharge current: 1.0C rate
Thickness: ≤89mm
Width: ≤81mm
Length: ≤213mm
18650 10S3P 36V 6Ah Battery
Nominal voltage: 36V
Nominal capacity: 6Ah
Rated energy: 216Wh
Charge current: 1.0C rate
Discharge current: 1.0C rate
Thickness: ≤118.1mm
Width: ≤11.81mm
Length: ≤3.94mm
18650 14.8V 5.2Ah Battery Pack
Nominal voltage: 14.8V
Nominal capacity: 5.2Ah
Rated energy: 76.96Wh
Charge current: 1.0C rate
Discharge current: 3.0C rate
Thickness: ≤135mm
Width: ≤38mm
Length: ≤38mm
18650 12.8V 100Ah Battery Pack
Nominal voltage: 12.8V
Nominal capacity: 100Ah
Rated energy: 1280Wh
Charge current: 0.2C rate
Discharge current: 1C rate
Thickness: ≤135mm
Width: ≤70mm
Length: ≤85mm
Customized Battery Pack Suitable
We can customize made lithium ion battery packs according to customer product requirements to meet high-power requirements in various application scenarios, improving equipment performance and reliability.
Steps to Custom Lithium Battery
Here are the four steps for lithium battery customization:
- Information collection: voltage, capacity, charge and discharge currents, operating time, working temperature, and maximum dimensions, etc.
- Cell selection: our engineers recommend suitable cells considering size, cost, temperature range, and current among other cell parameters.
- Electrical & mechanical engineering: Considerations include cell bracket, placement of the protection board circuit, insulation paper, and NTC probe position, to meet specific spatial requirements.
- Prototyping and validation: We can provide samples within 7 days. If necessary, we can provide two sets of samples for cycle testing and validation.
Custom battery pack manufacturer
- Minimum Order Quantity: 500 pieces per model.
- All orders come with the necessary certificates.
- For custom battery pack design, look no further than Hongyitai today.
Battery Pack Manufacturing Process
- Cell matching: Within the same batch of cells, we also perform matching, mainly controlling that the voltage, capacity, and internal resistance are within specific ranges.
- Battery pack assembly: Selected cells are secured using glue or brackets, and nickel strips are welded on, connected in series or parallel to increase voltage or capacity.
- Adding boards and wires: The selected protection board is welded on, whether a hardware or software board, to provide functions like overcharge, over-discharge, overcurrent, short-circuit, and temperature protection.
- Insulation: Use highland barley paper or high-temperature insulation glue inside the structure to prevent short circuits.
- First full inspection of the finished battery pack: Test the battery pack’s voltage, current, internal resistance, and charging/discharging conditions.
- Aging test: Usually 1-2 high-temperature aging tests to activate the chemical substances in the cells.
- Adding casing or PVC: According to customer needs, the battery pack is encased in a shell or wrapped with PVC.
- Second full inspection of the finished battery pack: The battery pack’s voltage, current, internal resistance, and charging/discharging conditions are tested again.
The above is our production process for lithium-ion battery packs. Of course, the production technology and precision are important factors that affect quality.
Your One Stop Factory for Lithium-ion Battery
Are you still struggling to find high-quality, reliable, and durable lithium batteries? Hongyitai is a professional Chinese battery supplier that values quality and service. We can provide a 100% exchange and replenishment guarantee for defective or damaged batteries.
Our biggest advantage is custom made batteries, where our team designs complex custom battery packs for applications such as medical, industrial, and aerospace. All the batteries we produce are strictly produced in accordance with ISO9001 and have applied for certifications such as UN38.3, IEC62133, CE, etc.
For the past 10 years, we have collaborated with customers from various industries and met their lithium-ion battery needs. Tell us your specific needs, and we will develop a customized battery pack that meets your needs!
FAQs for custom battery packs
OEM batteries are specific batteries we manufacture according to customer requirements to meet their specific needs. We design and produce batteries strictly according to customer specifications. Although this might increase the cost, we ensure reliable performance and longevity.
The main factors affecting the lifespan of a battery pack are the number of charge cycles and the usage time. Other significant factors include the average power of charging and discharging, storage and operating environment temperatures, and the depth of charge and discharge. It is recommended to avoid frequent deep discharges and to maintain the charging range between 20% and 95%, charging promptly.
Under normal conditions, ternary batteries can achieve 500 to 800 charge cycles, lithium iron phosphate batteries can exceed 3000 cycles, and 18650 battery packs can exceed 500 cycles.
Rechargeable battery pack consists single battery cell, protection board, insulation components, wires, connectors to meet specific demands. It equips battery series and parallel combination to arrive voltage and capacity needs.
However, PCM or BMS has over-charge, over-discharge, over-current and short circuit protection. Some have cell balanced, communication protocol (RS485, RS232, CAN) to monitor each battery status.
Below are main testing to be done for chargeable lithium battery pack:
- Capacity & performance testing. It is mainly working on charging and discharging cabinet with 0.5C rate or required current rate.
- Safety testing will include: thermal shock and cycling, external short circuit protection, overcharge protection, over-temperature protection, thermal propagation protection, resistance to mechanical demage by external force, internal short circuit and thermal abuse.
Custom li ion battery pack has various advantages over single cell. Below are some key benefits:
- Big output power. Because of increased voltage and capacity, it supports big output energy.
- Longer lifespan. It has good cell matching before battery pack assembly, it can have an excellent perform compared standard battery.
- Customization. We can custom battery series and parallels for your innovation devices. It can tailor shape, voltage, capacity, charge & discharge current rate, components.
- More safety. As protection board works, it works short circuit, over charge, over discharge, over current protection.
- Versatility applications. It meets different applicates requests. No matter it is medical device, consumer electronics, security communication device and Internet of Things.
Types of batteries are used into battery pack assembly.
- Lithium ion battery. It is mostly used battery models like 18650 cells, 21700 cells, 26650 cells and 32700 cells.
- Lithium ion phosphate battery. As it is safer and cost-effective features, the lifepo4 battery are widely used into storage energy and electric vehicle.
- Lithium polymer battery. It works on small series and parallels by lipo batteries. They work for consumer electronics and drone device.
