How to detect and repair electric car battery

　　Author ：Iflowpower – Portable Power Station Supplier

Open the battery pack cover, check the battery to be repaired without hot off the connection line. Online inspection Important includes the following check content: 1, the digital multimeter is in the DC 20V file, measure the single battery air-load voltage, generally should be more than 12V. If the voltage is above 10.

5V, this battery has a possibility of short circuit; if the terminal voltage exceeds 13.4V, it means that the battery is less serious, and even vulcanization occurs; although some battery terminals do not exceed 13.4 V, there is also There may be severe downtime.

This is because: 12V battery consists of sixge, 5 of which have serious water, but there are other problems in one, the total open circuit does not exceed 13.2V. 2, discharge the single battery with 12V100W car bulb or 24V300W halide bulb while measuring battery-side voltage.

If the battery voltage is slow, it is not deep, it means that the repair chance is very large; if there is a voltage drop of 2V above 2V, it will illustrate the backward monoshanism; 3, the discharge bulb is connected in series, and connect the tens of thousands of menu, for the battery pack ( Take 36V battery pack as an example) discharge. Normally, a group of batteries to be repaired is generally only a battery that is seriously damaged, known as backward batteries. When the battery pack voltage drops below 34V, if the battery pack is about the same diarypse, it can be judged that there is a battery backward, and this battery must have a backward single.

Measure a single battery voltage to find a battery backward battery. You can also measure a single battery with a battery fast capacity detector to find a backward battery, and repair it first on the backward battery. 4, measure the battery terminal voltage to 12V, even higher, but with light bulb is not bright.

Clean the positive electrode with the fish clip, the other end is blowing on the negative pole ear, if not, the fire flower can be judged; if the battery is opened; This situation is very likely that the battery has a single single; there is a situation, some of the poor quality batteries, due to the irregular materials, will result in the pole group extraction terminal under the underside of the extract The shape of the spindle is sometimes in a semi-open state, sometimes in the open state, when charging, the angle heat or opening of the extremely ears is not advanced; 5, the battery end voltage is about 0V, which is generally the battery placement time is very Long, due to battery self-discharge and polar vulcanization, the battery capacity is completely lost, causing severe irreversible vulcanization. This failure mode is often very similar to the open circuitry, especially completely open battery, and the terminal voltage is also about 0V, which is distinguished. The above test methods should be used to be used.

It cannot be used to detect the crash rate by means of a means of detecting a malfunction; in addition, some batteries have a few steps to make a few steps, and even the anti-push method to verify the judgment. In short, the inspection and judgment of the battery failure is a affirmation - negation - no sure - negation - the final affirmation process. 1.

If it is a mechanical multimeter, please pay attention to the positive and negative poles of the multimeter, so as not to damage the head. Nowadays, most digital multimeters (there are multiple protection circuits), simply adjust the DC voltage file (100V). Note that you cannot adjust the current or resistive file, otherwise you may burn your multimeter! (2) Maintenance principle: first look after the amount; first after it is easy; first, after it looks at: If the lead-acid battery is obviously dried or leakage, the battery is about to be scrapped, please change it.

New battery. Next, the output voltage of the battery can be measured. Such as the 48V battery, the measured voltage can reach 50-53V.

Finally, turn on the motor (let the battery on the load), then measure its output voltage. At this time, if the output voltage drops too much, the battery has been aging or externally present (4), after the third step is the output voltage outside the battery, if it is 0, it needs to be folded out of the battery. The voltage and string of each skewer battery are detected separately, and the strings are open or soldered (5), and the relevant experience: the friend who purchases electric cars, there is a must-have to do the ability to use the merits and iron iron Waiting for tools, you can repair most battery failures.

The author, I have purchased the five famous brands of electric vehicles in China, I found a common question: the internal wiring of the battery is generally existed. In particular, the riding is about 6 months, riding under the condition of road conditions, and the virtual welding can cause the riding process to suddenly be powered off and lose power. At this time, it is easy to think that the battery is aging and purchasing a new battery.

In fact, if you have the ability to do, the battery is completely possible with 6-15 months. Among the 5 electric vehicles, 3 soldering is happening at the battery and external charging connector connection, which is more hidden because the solder joints often cover the insulators, can't see the meat. .