How to judge (detect) the quality of the electric vehicle battery

1. Judging the old and new battery from the appearance:

In fact, this is very easy to judge, generally get the hand, look at the appearance can judge, whether there are traces of grinding, scratching, and then see if there is rust in the metal parts of the battery.

2. Use a professional measuring voltage tool to determine whether the battery has an internal short circuit (bad battery):

After riding for a while or charging for a few hours, the car is measured for voltage at the charging plug. It is normal battery (not old or new) when it is 48 volts or slightly higher. If it can only reach 46 volts or less, it means that there is a short circuit in the battery (four batteries in 48 volts, each group consists of six 2 volt batteries connected in series to 12 volts), indicating that the 10 volt group is a bad battery..

3, judgment of scrap batteries:

1) After a full charge, if sudden acceleration cycling, whose hands fall only less than half power grid (small scale), it is a new battery.

2) After a full charge, if sudden acceleration cycling, whose hands down one battery, it is half the old and new battery.

3) After a full charge, if sudden acceleration cycling, whose hands down 2-3 power grid, it is fast scrap old batteries (charged half moon do not ride will self-discharge running light).

4) After a full charge, if sudden acceleration cycling more than four is discarded batteries.(a full charge is not a week riding, electricity will self-discharge running light).

How to detect and repair electric car battery

With 12 v detector to detect the no-load voltage of battery, good battery open circuit voltage at around 13.2, if around 12 battery power to recharge, if around 10 v showed damage a cell, if around 8 v shows damaged two case, if the 8 v can sulfide or severe loss of power.

Load voltage detection, press the test button to load voltage should be in more than 8 v, if the speed limit in 8 v and loosen the button voltmeter recovered to more than 12 v, shows that the battery has broken or serious aging.

To detect the single voltage, insert the single detector six pens and in turn into six inside, press the test button, observe the seven table reading changes, the voltage drop is more than the other, which shows that the corresponding lattice damaged, out of the battery to repair manual open shell.

When the electricity is about to run out, take the rear wheel of the car overhead (for easy measurement), open the battery compartment, then start the car (the overhead, the car will not go, is idling), and measure each battery voltage with a multimeter. If the battery is significantly lower than 12V, or lower than other batteries, it means the battery is broken. If you say that all three are the same, and they are normal, and you are sure that one of them is broken, then your battery is not fully discharged. You should put some electricity and measure it.

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