Common SOC Measurement Methods
Open circuit voltage is the most common basic method. The battery should rest before testing, because voltage under load may be lower than its real condition. For more accurate projects, engineers may use discharge testing, coulomb counting, or device-side battery management data.
| Method | Main Use |
|---|---|
| Open Circuit Voltage | Quick battery condition check |
| Load Voltage Test | Checks performance under working load |
| Discharge Test | Measures actual remaining capacity |
| Coulomb Counting | Used in advanced battery systems |
| Temperature Review | Helps correct test results |
Primary Lithium Battery Considerations
Hongli focuses on primary lithium manganese batteries, including CR123A, CR2, CR14250, CR14505, CR17450, CR17505, CRP2, 2CR5, CRV3, CR9V, 3V button cells, and customized lithium battery packs. Primary lithium batteries are not rechargeable, and their voltage curve can stay stable for a long period before dropping near end of life. This means voltage alone may not always show remaining capacity accurately.
Manufacturer Vs Trader
A trader may supply battery models, but may not control cell consistency, capacity grading, internal resistance, leakage inspection, or batch traceability. A direct manufacturer can manage material selection, cell production, testing, labeling, packing, and export documents more effectively.
OEM ODM And Testing Design
For OEM / ODM projects, buyers should confirm voltage, capacity, pulse current, continuous current, operating temperature, connector, wire length, label content, storage life, and SOC testing method. Hongli checks open circuit voltage, capacity, internal resistance, leakage, appearance, polarity, insulation, high-low temperature performance, packing accuracy, and batch records.
Export And Bulk Supply Checks
Lithium battery export commonly requires MSDS, UN38.3 test information, proper packaging, carton marks, and transport documents. Before bulk orders, buyers should confirm application load, test standard, MOQ, lead time, packing method, and compliance documents.
SOC measurement is most reliable when it combines voltage data, load behavior, temperature, and application testing. Hongli can support stable lithium battery production, customized battery packs, and export-ready documentation for industrial power applications.