How do you determine if the battery or alternator is bad when a car loses power?

Introduction How do you determine if the battery or alternator is bad when a car loses power? 1. First unplug the motor, use a metal wire (hair-sized thin copper wire like that of flower wire) to instantly short the positive and negative poles.

How do you determine if the battery or alternator is bad when a car loses power?

1. First, unplug the motor and use a metal wire (a thin copper wire the size of a hair like that of floral wire) to instantly short the positive and negative poles. If there is sparking, the battery is normal; If there is no spark, the battery power is insufficient or the battery is broken. The size of the spark indicates the size of the battery. If the wire (a single copper wire) is pulled out by a simple touch, the battery has enough power. If there is no problem with the battery, the problem should be with the generator.

2. Car owners can observe battery usage themselves. Nowadays, the battery of many car models has an observation hole, also called an "electric eye", which is usually located in the upper right corner of the battery. The condition of the battery can be judged by observing the color change of the battery.'electric eye'. ".

If the color inside the "electric eye" is green, it means that the battery is in good condition and there is a problem with the engine; if it has become white, it means that the battery is about to be discharged and needs to be replaced in time

Detailed information

Faults. common in electrical systems:

1. The battery discharges itself after it is fully charged and not used, the power reduction phenomenon is mainly caused. by impure battery electrode materials, impure electrolyte, too high storage temperature or the battery has been left unused for a long time, sulfuric acid flows, and a potential difference occurs between the upper and lower parts of the plate

2. The battery electrolyte is consumed too quickly, which may be related to uprevent leakage and overflow caused by cracks in the casing and sealing glue, excessive charging current, bumpy roads, etc.

3. The charging system is not charging, which means the charging light does not turn off when the engine is running at medium or high speed. The main reasons are that the generator drive belt slips or breaks, the circuit is open or shorted, the regulator is damaged, or the generator cannot produce electricity.

4. Charging current is too low In addition to poor line contact and transmission belt slippage, it is also related to poor brush contact, commutator or deformed and partial surface oil. short circuit or open circuit of the rotor or stator winding.

The charger fuse may be blown. The reverse current of the reverse load is quite large. In order toTo protect the charger, a fuse is installed on the output part for protection. Check the fuse.

Partial short circuit of the quality plate

Theoretically speaking, if it is lower than 9.5 volts, it will not be able to ignite, and if it is lower than 10.5 volts, it will not be easy to ignite. Generally, it cannot be lower than 11.5 volts. It needs 12 volts to be normal after ignition, because the generator starts charging the battery after ignition.

I am a battery specialist. The situation you mentioned is caused by lack of fluid in the battery. Distilled water should be added (remember it should be distilled water and not electrolyte). Also, it depends on the age of your battery. If it is more than 3 years old, it has virtually no repair value. If the battery is deformed, you can only replace it with a new one!

Charge with a neckrant of one tenth of the rated capacity until the battery temperature increases significantly and observe if the network boils. If there are still no bubbles, but the battery can still be used, don't worry about it for now. Today's batteries have a sealed structure, making it difficult to replace individual cells, so there is no need to worry about this. .Repair recommended.

Nowadays, dry batteries are mainly used. Once water batteries are used in large tricycles or boats, most people will not repair them for you. It is recommended to replace them with new ones.

  • Popular Focus
  • Where is the cheapest battery wholesale?

    Where is the cheapest battery wholesale in Tangxia, Sanyuanli, Baiyun District? There is an enterprise specializing in the independent production of electric vehicles in Tangxia, Sanyuanli, Baiyun District, Baiyun Sanyuanli Avenue, Baiyun Sanyuanli Street
    08-02
  • Four 3.7V lithium batteries in series and parallel produce 7.4V/4.4A. How to reduce it to 4.8V/4.4A?

    Four 3.7V lithium batteries in series and parallel produce 7.4V/4.4A. I personally think it is impossible to reduce it to 4.8V/4.4A. Because the discharge platform of lithium batteries is generally set
    08-10
  • What are the materials of the negative electrodes of lithium batteries?

    What are the materials of the negative electrodes of lithium batteries? The main commercial applications of lithium batteries include graphite, which is a sheet of copper used to guide current and which does not react. another safe
    08-02
  • The difference between 18500 and 26500 batteries

    What is the difference between 18500 and 26500 batteries? The answer above is 18650. The person asking the question should ask what is the difference between 18505 and 26500 batteries. In the case of Fuant ER1
    08-02
  • What does 3.7V 80mAh written on a lithium battery mean?

    What does 3.7V 80mAh written on a lithium battery mean? 3.7 V, 80 mA = 0.08 A, H means 1 hour, or 3600 seconds. Taken together, it is
    08-02
  • How long does a lithium battery (cell phone battery) last?

    How long does a lithium battery (cell phone battery) last? The lifespan of mobile phone batteries, under normal conditions of use and without serious impact, the lifespan set by the manufacturer must be 5 years.
    08-02
  • Will lithium batteries explode when charging?

    Will lithium batteries explode when charged? Will lithium batteries explode when charged? Lithium battery explosions usually occur during the charging process, because the negative electrode material of lithium batteries is graphite or other carbon materi
    08-02
  • Parameters of lgdas31865 lithium battery

    Parameters of lgdas31865 lithium battery The parameters of lgdas31865 lithium battery are as follows: LGDAS31865 is a model 18650 lithium battery with a capacity of
    08-02
  • What are the main components of lithium battery electrolyte?

    What are the main components of lithium battery electrolyte? The composition of lithium battery electrolyte is shown below. 1. Ethylene carbonate: molecular formula C3H4O3. Colorless transparent liquid (>35℃), room temperature
    08-02
  • Who are the lithium battery manufacturers in Shandong?

    What are the lithium battery manufacturers in Shandong? Shandong Shengyang Power Supply Co., Ltd. and Shandong Weineng Environmental Protection Power Technology Co., Ltd. 1. Shandong Shengyang Power Supply Co., Ltd. is located in Shengyang, Qufu City.
    08-02
  • Types of drone batteries available in 2024

    Part 1. Types of drone batteries available in 2024In 2024, drone batteries have advanced significantly, offering a range of options to cater to various needs in
    07-30
  • How long does it take to charge 26650 battery?

    How long does it take to charge a 26650 battery? The charging time for a 26650 battery is generally between 3 and 6 hours, but the precise time depends on the power of the charger and the capacity of the battery. in general
    08-02
  • For what?Sure, here's an article based on the phrase "For what?

    The simple yet profound question, "For what?" often serves as a gateway to deeper reflections on purpose and intention. It is a query that invites us to delve into the reasons behind actions, decisions, and circumstances that shape our lives and the wor
    08-02
  • Choosing the Right Cart Battery

    This comprehensive guide will walk you through everything you need about cart batteries, from understanding different types to making an informed purchase decision.
    08-02
  • 30mAh~500mAh 3.7 V Li-ion Battery

    Welcome to Ufine's collection of 3.7V lithium-ion batteries ranging from 30mAh to 500mAh. Explore a diverse range of compact and lightweight batteries suitable for various electronic devices,
    08-02
  • Here are 10 essential facts about drone batteries for 2024.

    10 Key Facts About Drone Battery for 2024 In 2024, drone batteries have advanced significantly, offering a range of options to cater to various needs in the consumer, commercial, and industrial sectors. Below are the primary types of drone batteries avai
    08-02
  • Could you please explain the difference among IMR, ICR, INR, and IFR 18650 batteries?

    What is the Difference Between IMR, ICR, INR, and IFR 18650 Battery?In 18650 batteries, discerning the differences among IMR, ICR, INR, and IFR types is fundamental for tailored and efficient battery usage. These distinct
    08-02
  • Safety considerations for cart batteries

    Selecting the ideal cart battery is crucial for ensuring optimal performance and longevity of your electric vehicle or vaping device. This comprehensive guide w
    08-01