The battery pack is made up of battery cells. Whether the condition is good or not will directly affect the battery pack's capacity and life. Because the battery core is different in the factory state, and the current and temperature difference in the battery pack position, the battery voltage and capacity imbalance, which reduces the performance of the entire battery pack, and this effect will be increasingly increased. In addition, the battery modules in the process will also have different voltages due to different self-discharge rates due to long-term placement of the battery modules. It is necessary to perform balanced maintenance and capacity check before assembling the battery pack.
The above table shows the difference in capacity and DC impedance measured from 4.15V discharge to 3.0V for a battery pack for an electric motor that has been used for half a year. In practical applications, as long as a battery cell with a poor capacity has been discharged, even if most of the battery cells still have power, the built-in BMS will still alarm that the battery pack can no longer be discharged.
In the face of such problems, what you need is a tool that can diagnose and repair battery core imbalances. Based on the 8700 ATS platform, Chroma has introduced a battery maintenance diagnostic solution that not only solves the battery core imbalance, but also has an efficient and comprehensive test function.
1. One-click automatic test program to complete the test
The system can automatically adjust according to the voltage of each cell determined by the user. No need for human operation in the middle, just wait for the test result.
2. Test report
All test conditions and results can be reported, and it is easy to find the bad battery cells. The report format can be customized by the user.
3. Exclusive test project
Battery DC impedance measurement
Each cell capacity test
Battery balance test
DC impedance measurement / capacity test can help you understand the status of each battery cell. The cell balance test returns the unbalanced cell voltage back to equilibrium. Conversely, this feature can also create cell imbalances for related tests of voltage imbalances (such as UL2271).
The Chroma 8700 not only quickly diagnoses the state of the battery core, but also significantly extends the life of the battery pack. Can be used in the daily maintenance of the product, or before the battery pack is assembled. It obviously brings quality advantages to battery manufacturers and also gives end users more protection.
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