Although the proportion of the battery to the cost of the car is not high, it plays a decisive role in the entire car. How can we judge whether the car battery is still good? The battery tester has played a very important role in this regard, and The method is simple:

1, the basis for traditional battery testing At present, almost all cars in the world use lead-acid batteries, lead-acid batteries is the biggest feature is that with the use of batteries, the battery gradually aging, when the battery capacity is reduced to his original rated capacity At 80% of the time, the capacity of the battery may show a "divergence" drop. At this time, although the battery may still provide some energy, it may be scrapped at any time. In the domestic and international battery industries, 80% of the battery capacity is used as a critical point for lead-acid batteries. When the battery capacity is reduced to 80% of its original rated capacity, the battery needs to be replaced.

2, the traditional way to determine the health status of the battery to determine the health of the traditional way is to discharge, by discharging to test the current actual capacity of the battery to determine the health of the battery. For car batteries, the International Battery Association (BCI) stipulates that it discharge at room temperature with a rated cold starting current of 1/2 for 15 seconds. If the battery voltage is more than 9.6V, the battery passes the discharge test and is a healthy one. Battery.

3, the traditional test means less than the traditional method of adding a load to test the battery, the lack of means has the following performance:

A, the battery being tested must be fully charged, at least 12.4V, because the test principle is to discharge, if the test object has been partially discharged, it will inevitably lead to the measurement result voltage value is low and cause misjudgment;

B. For the same battery, continuous measurement cannot be repeated and the same result is obtained. Because the test process is the discharge process, the battery being tested must be recharged after it is tested before it can be measured again.

C. A lot of heat is emitted during the test process, and multiple batteries cannot be continuously tested.

D. The test process requires the tester to be well-trained. Because the voltage of the battery must be read at the moment of 15 seconds of discharge, the operator's level and sense of responsibility will influence the test conclusion.

4, the impact caused by the traditional lack of precisely because of the traditional means of testing the battery is insufficient, battery dealers and car repair stations, car dealers often return good batteries as bad batteries returned to the manufacturers, according to the United States largest car battery dealers INTERSTATE statistics, in the so-called bad batteries returned, 50% of the batteries are actually good, these batteries need to be charged, not replaced, this part of the good battery, just because of the error judgment, unnecessary to and from the manufacturers Between the dealer and the dealer, each one consumes money.

Due to the lack of efficient testing tools for many vehicle maintenance outlets, it has not been possible to find a weak battery before the owner encounters a problem, thereby losing the potential to sell the battery. The traditionally used measurement indicators, such as terminal voltage, reflect the state of charge (SOC) of the battery rather than the health condition (SOJ) and cannot be used as an effective method to check whether the battery needs to be replaced.