How important is car power battery cell testing? You will understand after reading it
The rapid development of new energy vehicles in recent years has driven the rapid development of the power battery industry.
The power battery is composed of Cell-->Module-->Pack.
The process of forming a certain power battery
As the smallest unit of a power battery, the battery cell is also an electrical energy storage unit. It must have a high energy density to store as much electrical energy as possible so that electric vehicles can have a longer cruising range. In addition, the life of the battery core is also the most critical factor. Damage to any battery core will lead to damage to the entire battery pack.
Therefore, during the battery cell production process, relevant tests must be conducted to better ensure the quality of power batteries.
1
Cell formation and capacity dividing equipment
This type of equipment is generally system equipment with batteries larger than 100CH. During the production process, the voltage and current of the equipment's charging and discharging need to be calibrated regularly. The standard instrument for calibration must be at least a 6½ digital multimeter.
DMM6500 multi-channel measurement diagram
DMM6500 is a 6½ DMM with a voltage accuracy of 1mV and a current accuracy of 0.5mA. It is suitable for cell calibration. In addition, you can also choose DMM7510 with higher voltage accuracy (0.1mV).
2
Cell OCV testing equipment
The single cell open circuit voltage, AC internal resistance, and case voltage testing of the OCV testing machine are an important part of the battery production process. They need to meet the OCV accuracy of 0.1mV and the case voltage accuracy of 1mV. DMM7510 can fully meet the technical requirements of this link.
Schematic diagram of DMM7510 embedded battery cell OCV test equipment
3
Battery cell grouping, grading and matching equipment
According to the production process flow of the battery industry, batteries will be graded intensively in the later stages of battery production. The grading function can automatically scan codes of incoming batteries and select and grade the completed batteries according to specific rules. The high accuracy and stability of DMM7510 are important tools to ensure consistent battery classification.
Schematic diagram of DMM7510 embedded battery cell grouping, binning and matching equipment
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