This OCV and Internal Resistance Tester functions as an indispensable engineering tool for in-depth cell diagnostics and process validation. Beyond basic screening, this lithium ion battery testing machine delivers critical insights for failure analysis by correlating subtle shifts in Open Circuit Voltage (indicative of chemical stability) with precise internal resistance measurements (reflecting mechanical and interfacial integrity).
The instrument excels in process optimization, enabling engineers to pinpoint variations caused by electrode coating, calendaring, or formation parameters. With configurable test schedules, high measurement stability, and seamless integration into MES systems, it provides actionable data for root-cause analysis and continuous improvement. It is vital not only for final quality control but also for validating raw materials, auditing cell batches, and troubleshooting performance issues throughout R&D, manufacturing, and field return analysis.
Specifications and Scope of Application
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size |
Compatibility range |
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Cell height (H) |
118~210mm |
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Cell width (W) |
130~173mm |
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Cell thickness (T) |
36~72mm |
Device Composition
MODEL: SZO-OCV-SD-02
This device consists of three components: a scanning system, a test fixture, and an OCV testing system.
Scan Code System
Scan the cell manually.
After scanning, upload the cell data to the host computer software.
Test the robotic arm system
The test fixture consists of a lifting mechanism, a test probe mechanism, and a cell positioning mechanism.
After the QR code scanning is completed, the positioning mechanism will position the battery cell. Once positioning is complete, the test robot arm will descend with the probe mechanism to perform an Open-Circuit Voltage (OCV) test on the battery cell.
The test pressing adopts the cylinder method.
OCV Test System
This system includes test instruments and test cables.
Equipment Operation Procedure
Qualification
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structure of equipment |
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order number |
project |
technical parameter |
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1 |
Device channel count |
Test 1 battery per test |
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2 |
Machine color |
Standard warm 1C (customizable) |
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3 |
working power supply |
AC220V±10% three-phase five-wire, 50HZ |
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4 |
work environment |
Ambient temperature: 10-40℃; relative humidity: ≤60% |
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5 |
Work air source |
0.5-0.8MPa |
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6 |
plant capacity |
≤1.0KW |
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7 |
weight of equipment |
≤500kg |
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Testing organization |
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order number |
project |
technical parameter |
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1 |
probe |
The current needle is serrated and the head is gold-plated to ensure the accuracy of current passing and voltage sampling |
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2 |
Probe press count |
≥20,000 times |
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3 |
Probe contact resistance |
≤5mΩ |
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OCV system |
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order number |
project |
technical parameter |
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1 |
test cable |
twisted shielded pair |
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2 |
test instrumentation |
Sunny |
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3 |
Voltage test accuracy |
±(0.0035% set+0.0005% FS) |
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4 |
Voltage resolution |
10μV |
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5 |
Internal resistance test range |
0～3mΩ |
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6 |
Internal resistance test |
±0.5%rdg.±10dgt |
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7 |
Internal resistance resolution |
0.1μΩ |
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8 |
GRR |
≤10% |
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9 |
Zero plate |
The 'Gong' character-shaped design [as referenced in BT3562's First Edition (A980-00) by Nippon Electric Co., Ltd., Appendix 12, detailing the zero-adjustment principle for 9454] |
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10 |
Internal resistance master block |
The standard resistance value is 25 mΩ ± 0.5 mΩ |
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11 |
Local monitoring computer |
Configuration requirements (provided by Party A): Operating system: Windows 10 or later Chinese version language: Simplified Chinese CPU: Intel Core i7 or higher Memory: 12GB or more Hard disk: 1TB or more Display: 19 inches or more LCD display |