How to test electric car lithium ion battery pack?

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

I. Multimeter Test Electric Automotive Bottle Body-bad Professional Detection The battery capacity is the most accurate approach is the overflow discharge device detection, C = W = IUT, that is, the capacity is equal to the discharge current An (a) X voltage voltvoltage (V) x Time Second Or hours (s or h), generally discharged with rated capacity 0.5 2 magnification current, such as 12AH battery full power is discharged at the rated voltage current for two hours to qualify standard, current size heel discharge time and discharge capacity is inversely proportional, discharge current The greater, if the 2 magnification is more than one hour, the discharge capacity is about 8AH, the opposite is 0.

5 magnification discharge, more than two hours can be discharged 15ah. Second, the professional electric vehicle lithium-ion battery pack test method 1, after the battery is filled, connect the battery, current table, and resistance wire. 2, the internal disconnection of the battery.

Some electric vehicle lithium-ion battery pack interior is broken, which is characterized by battery voltage - free current. The whole vehicle is electricity, the motor is not turned, such as replacing a set of new batteries, it is the battery problem. 3, the charger green light does not transform, when charging, the charger green light does not transform, the charger green light is on the air, the general condition is that the internal water is lackless or faulty, and then the battery is opened, and then rotate Valve or safety valve, inject the appropriate amount of special supplement to the battery, charge for 6-10 hours to convert.

4, electric car continuation mileage, test vehicle no-load current and running current are too large, no air-load current should not exceed 1.2 amps, run current at a load of 75kg, speed 20km / h, flat cement or asphalt road It should not be greater than 7.5 amps, and if the above situation occurs, the controller or the motor will be probed again.

People's demand for high-capacity rechargeable batteries is increasing, so there is a smart, accurate measurement technology to determine the status of the battery. The development of many new technologies will depend on whether it can be processed to supply sufficient capacity and long effective life. Ensuring that the quality of the rechargeable battery is a major challenge, our non-contact test method is expected to improve the battery, one of the researchers, such as Wenwikken Brook,.

The research team uses atomic magnetorators to measure the breakthrough progress. Wikken Brooke said: Our technology is basically the same as magnetic resonance, but it is much more simply because we use atomic magnetometer. Atomic magnetometer is a light pump magnetometer utilizing gaseous atom as a magnetic field probe.

They are commercially available and can be used in industrial use and basic research. Simple way to achieve fast and high-throughput measurements. In the case of battery measurement, the battery is placed in a background magnetic field.

Battery changes background magnetic field, we can measure this change through atomic magnetometer. Wikken Brooke added: This change provides us with information on battery charging, battery remaining power and possible damage.

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