I've worked with dozens of battery labs and production lines over the past three years, and I know firsthand how a reliable OCV & IR tester can make or break your quality checks. Our SZO-OCV003 is built to eliminate the guesswork, no overcomplicated extras.
It measures open circuit voltage to spot early self-discharge issues and estimate state of charge, while checking internal resistance to gauge power delivery capability. The readings are fast and consistent, with the accuracy you need for both voltage and resistance. The software logs every test to a unique cell ID, so you can trace results easily through R&D validation, incoming inspection, or production screening.
One of my clients switched to this tester and cut their defective cell rate by 30% within the first month. Whether you're doing lab work, line screening, or failure analysis, it's a straightforward, dependable tool to keep your process under control.
Model: SZO-OCV003
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
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 |
FAQ
Q: What's the main difference between OCV and internal resistance testing?
A: OCV tells you the cell's state of charge and flags self-discharge issues, while internal resistance checks how well it can deliver power, which is key for performance and safety screening.
Q: Can I link test results to individual cells for traceability?
A: Yes, the software lets you log every test to a unique cell ID, so you can trace results back through production or analysis easily.
Q: Is this tester good for both lab R&D and production line screening?
A: It works for both-fast, consistent readings make it great for high-volume screening, while the data logging supports detailed R&D validation and failure analysis.