Why does the battery have voltage but low current?

At this time, the battery is caused by aging. The internal resistance of the new battery is very small, so it can release a large current after charging enough, but the internal resistance becomes larger after the battery is aging, and it cannot release a large current.

The general lifespan of a lead battery is 2 to 4 years, and it is difficult to live for 5 years. The manufacturing quality of the battery has an impact on the service life, and the fewer impurities on the plate, the longer the innate life. Electrolyte.

The fewer internal impurities, the longer the acquired life.

Keep in mind that the electrolyte has the maximum capacity and the longest life when it is dense. If the density is high, although the voltage is also a little higher, it is easy to damage the positive plate; The density is low, the negative plate is easy to vulcanize, and although the life is a little longer, the capacity is reduced.

If the electrolyte contains more than 1% iron, it will be discharged in 24 hours with sufficient electricity.

Do not charge and discharge with high current, which is most likely to damage the positive plate (the active material on the plate falls off), but also do not put it aside or charge and discharge with a small current, so that it is easy to damage the negative plate (the plate is vulcanized, and hard white lead sulfate crystals are formed on the plate, and this part of the lead sulfate will no longer participate in the charge-discharge reaction after that), and the ideal charge and discharge current is between one-tenth and one-twentieth of the capacity. The shorter the time it takes to charge and discharge a large current, the better.

The positive plate is damaged by overwork of the battery, and the negative plate is damaged by excessive recreation. High electrolyte density damages the positive plate, low density damages the negative plate, and only reasonable use and maintenance of appropriate electrolyte density can prolong the life.

Batteries have internal resistance, when the battery is dead, in fact, it is not that the voltage of the battery is gone, but that the internal resistance of the battery increases, so that the output current decreases, this phenomenon is what we often say that the battery is dead! Because the internal resistance of the battery is too large, it cannot provide a large current.

It's not that the battery has a small current, but generally what we see is a small current battery. High-current batteries are commonly used in industry. Such as electric forklifts. The battery is big enough, and the fork is okay for a day and a night. Currents up to 100A

The batteries we generally see are generally used for small household appliances or vehicles. Because the size of the thing is small, and the current is not very large, therefore, the general battery current is small, which can meet the power supply demand.

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1. The battery has no current, but there is a high probability that it can be saved, and the battery is charged with direct current equal to the design voltage of the battery.

2. The original charger cannot be charged (there is no current passing through at all), but charging the battery with direct current equal to the design voltage of the battery will find that there is a relatively large current, and the charging current of this ballast base will slowly decrease, close to 0 after a few minutes, and the battery voltage is returning to the design level. At this time, stop charging, and then use a multimeter to measure the two poles of the battery to see if there is a normal voltage.

3. The display value of the cell voltage is lower than that of the rest of the cell, and the actual voltage value of the measured cell is compared, if the actual value is higher than the display value, and the voltage is the same as that of other cells, the LMU cell voltage is calibrated with the actual value as the standard, and if the measured value is consistent with the displayed value, the charge balance of the single battery is carried out manually.

Summary. Hello! I'm glad to be able to answer the question of "the battery has voltage, what happens if there is no current", I have given you the following answer:

1.If the battery is in trouble, the charging voltage cannot rise to the preset value of the charger, and the feedback voltage read by the full stop control circuit cannot reach the inverted value, and the red light cannot be turned. The charger control circuit is faulty.

2.Batteries that are less than one year old are mostly charger failures, and batteries that are more than one year old are mostly battery failures. In the later stage of charging, if the battery is seriously heated, it is generally a problem with the battery.

The battery has been in normal use for more than a year, because there is no liquid in it, it is easy to cause the failure of not turning off the lights. At this time, it is necessary to deal with it in time, otherwise it is easy to inflate the battery and scrap it.

Hello! It is my honor to be able to answer for you, your will be my infinite motivation to move forward, if you recognize my answer, please be timely, please give me a like. It's not easy to answer the question, thank you for your understanding.

The battery has voltage, and there is no current.

Hello, I'm glad to answer for you, I'm helping you inquire about the relevant information, typing takes time, please don't end the consultation Thank you, I will reply to you within five minutes, please wait a while.

Hello! I'm glad to be able to answer for you, about the question of "the battery has voltage, no current, what's going on, the stove seepage is late", I gave you the following answers: 1

If the battery is in trouble, the charging voltage cannot rise to the preset value of the charger, and the feedback voltage read by the full stop control circuit cannot reach the inverted value, and the red light cannot be turned. The charger control circuit is faulty. 2.

Batteries that are less than one year old are mostly charger failures, and batteries that are more than one year old are mostly battery failures. In the later stage of charging, if the battery is severely heated, it is generally a problem with the spine battery. The battery has been in normal use for more than a year, because there is no liquid in it, it is easy to cause the failure of not turning off the lights.

At this time, it is necessary to deal with it in time, otherwise it is easy to inflate the battery and scrap it. Hello! It is my honor to be able to answer for you, your will be my infinite motivation to move forward, if you recognize my answer, please be timely, please give me a like.

It's not easy to answer the question, thank you for your understanding.

This is normal.

With constant voltage charging, as the battery is gradually fully charged, the voltage of the battery gradually increases, and the natural current will become smaller and smaller. When the voltages are equal, the current becomes zero.

When the battery is fully charged, the detection circuit will cut off the circuit between the phone and the charger, and the charger will no longer be able to charge the battery, so today's smartphones don't have to worry about overcharging the battery.

However, the above process requires that the charger and charging cable are produced by regular manufacturers that meet the national 3C standard.