If there is a battery in the assembly of lithium batteries, does it have an impact if the voltage is

Yes, the assembly of the battery pack must first balance the capacity and power of each battery.

If one of the four batteries has a low voltage, the low voltage battery will become a reverse load. The more power the car accelerates and the lower the voltage battery consumes, the faster the battery consumes power than the original, so it is best to replace the battery with low voltage in time.

There is also a situation that one of the four batteries has a low voltage is different from different manufacturers, as long as it has been charged with the charger of the original car, there is no problem, but when replacing the charger, you must pay attention to the output of the new charger, and the connection method must be consistent with the original charger, otherwise the charger will be damaged.

Electric vehicle battery maintenance:

1. Don't replace the charger casually, and don't remove the speed limit of the controller.

Chargers from various manufacturers generally have individual needs, so don't change them when you're not sure. If the mileage requirement is relatively long, and multiple chargers must be equipped for charging in different places, the charger that is replenished during the day is used as a separate charger, and the original charger is used at night.

2. Protect the charger.

The general instruction manual has instructions on protecting the charger. Many users do not have the habit of reading the manual, and often think of looking for the manual after the problem occurs, and it is often too late, so it is very necessary to read the manual first.

3. Charge every day.

Even if you don't have a long battery life and can last 2 to 3 days on a single charge, it is recommended that you charge it every day so that the battery is in a shallow cycle state and the battery life will be extended. Some early users of mobile phones think that the battery is best to be charged after it is basically used, this view is not right, lead-acid batteries.

The memory benefit is not as strong.

The measurement voltage is not accurate, the internal resistance of the battery should be measured, and the internal resistance is consistent.

If the voltage of a lithium battery is low, it will have an impact.

When repairing, forCellsIf the voltage is low, it should be replaced decisively, for the battery and battery pack, the repaired battery pack will definitely have an impact, because the [internal resistance] between the new and old cells will not be exactly the same, and the capacity will be reduced to a certain extent.

Battery repair refers to the rechargeable battery whose performance is degraded or failed by physical or chemical means.

A general term for repairs to be made. Through repair, the capacity of the battery can be restored, the service life of the battery can be prolonged, and the performance of the battery can be improved.

The voltage of the battery.

The potential difference between the positive and negative poles of the battery.

Weigh the voltage of the battery, generally with a multimeter.

To measure the voltage of a battery during repair, it has three manifestations:

The first is called no-load voltage, also known as open-circuit voltage, which is the battery voltage measured when the battery is neither charged nor loaded.

The second is called load voltage, which is the battery voltage measured at a certain time during the battery discharge process.

The third is called ** voltage, which is the voltage measured by the battery at a certain time during the charging process. The calculation of the internal resistance of the battery is of great significance.

If it is low, you can supplement the electricity, charge it to the same voltage as other ones, fully charge, discharge it together, and see if this set of voltage changes will be low, if it will be low, that is, the capacity of this battery has been reduced and needs to be replaced, but if the difference is not very large, you can continue to use it. The optional battery should at least ensure that the battery capacity is the same, the difference should be very small, in one to ensure that the internal resistance of the battery is basically the same, and to ensure that the battery voltage is basically the same when assembling.

Separate wiring to charge the group with low voltage, and then after the power is finished, test whether it is still lower than the other group. If it is low, it means that the battery has deteriorated, and the group of batteries that are poor or the whole group is replaced.

The selection of the battery is to fully charge and then use the constant current discharge to calculate the discharge, or after the same constant current discharge, compare the voltage after discharge. Together, the combined capacity is close to that.

It is normal for the performance of individual batteries in lithium battery packs to deteriorate, and they can be replaced individually after measuring them one by one.

The requirement of a series of lithium battery teams is that the internal resistance is consistent. In this way, the charge and discharge can be balanced when charging and discharging. The consistency of the internal resistance of foreign brand-name batteries is very good, and the internal resistance of domestic inferior cells is poor, and the internal resistance of domestic inferior cells needs to be carefully selected before assembly, and the internal resistance changes greatly after a period of use, and the situation you encounter will appear.

Replacing one of the cells is often a stopgap measure. If the internal resistance of other cells is generally increased, the battery life will deteriorate. It can be judged by the charging time, usually the fully discharged battery pack takes 4-6 hours to be fully charged, and this group of batteries is full in 1-2 hours, indicating that the internal resistance of the battery is large, and the battery is basically reimbursed (once it is fully charged, it is the characteristic of the battery pack to be scrapped as soon as it is used).

Generally speaking, if it is ternary lithium, it is no problem to ensure that the pressure difference is within 50mv, and if it is lithium iron phosphate, it is required to be relatively low, and there is no big problem within 200mv

Assembling a lithium battery 72V, as long as the average voltage of each battery is not exceeded, in fact, there is no need to detect the battery voltage when the battery is fully charged before assembly.

As a lithium battery manufacturer, our matching standards are: differential voltage 3 mV, resistance 3 mOhm, tolerance 10 mA;

Assembling 72V this larger lithium battery pack, the general working current is relatively large, multi-series and multi-combination of single cells have relatively high consistency requirements (second only to the electric vehicle matching standard), as long as the cell selection, matching, design and production process are strictly required, in order to give full play to the best performance and life of lithium batteries, to ensure the safety of users.

If you buy a new battery, the smaller the better, look at it, the new 18650 is recommended to be within the gap Otherwise, it will not be worth the price of the new battery, if it is dismantling the lithium, it is not more than acceptable Before getting into the car, each battery is fully charged, and then the balance depends on the protection board Every few months or more than half a year, you can take out the battery pack and manually balance it, that is, use a single charge to fully charge each battery So that the battery can always maintain a relatively high efficiency state

Less than the best, generally the second decimal place can not be counted, as long as the first decimal place is the same, it is best to buy a protective plate with equalization, the small pressure difference can be automatically balanced, or all fully charged in the assembly.

Summary. Hello dear and happy to answer for you. The reasons for the low voltage of the lithium battery are as follows: 1. The lithium battery suffers from external short circuit or overcharge, reverse charge (forced overdischarge).

2. The battery is continuously overcharged with high rate and high current, resulting in the expansion of the battery core, and the positive and negative electrodes are directly in contact with a short circuit. 3. Short circuit or micro short circuit inside the battery, such as the positive and negative electrode pieces have burrs that penetrate the diaphragm paper and contact short circuit, the positive and negative electrode pieces are improperly placed and cause the pole pieces to contact the short circuit, or the positive electrode pieces contact the steel shell short circuit, the positive electrode tabs contact the negative electrode pieces to short circuit, the negative electrode powder falls into the separator paper, and the separator paper itself is defective. I hope this service can help you, you can click on my avatar to follow me, and if you have any questions in the future, you can consult me again, and look forward to serving you again.

Wishing you well; Happy life, everything goes well [warm] [warm].

Hello dear and happy to answer for you. The reasons for the low voltage of the lithium battery are as follows: 1. The lithium battery suffers from external short circuit or overcharge, reverse charge (forced overdischarge). 2. The battery is continuously overcharged with high rate and high current, resulting in the expansion of the battery core, and the positive and negative electrodes are directly in contact with a short circuit.

3. Short circuit or micro short circuit inside the battery, such as the positive and negative electrode pieces have burrs penetrating the diaphragm paper contact short circuit, the positive and negative electrode pieces are improperly placed and cause the pole pieces to contact the short circuit, or the positive electrode pieces contact the steel shell short circuit, the positive electrode tab contacts the negative electrode piece short circuit, the negative electrode drops liquid cracking powder into the separator paper, and the separator paper itself is defective. I hope this service can help you, you can click on my avatar to follow me, and if you have any questions in the future, you can consult me again Liang regrets, and look forward to serving you again. Wishing you well; Happy life, everything goes well [warm] [warm].

Hello dear, because of polarization, the voltage of the negative electrode material will increase after the discharge and standing, and the static voltage of the positive electrode material will decrease. Depending on what material you measured, if it is a negative electrode material, it should be a micro-short circuit of the battery. It is speculated that the voltage difference is large, that is, there is a problem with one string of batteries, resulting in the actual capacity being lower than other strings, and then leading to a problem:

When charging, he is the first to be full, a single section reaches the protection voltage, the charging is cut-off, when discharging, he is the first to discharge, to the discharge protection voltage, other batteries can not be released, that is, the phenomenon of high and low is often said, resulting in a serious decline in the actual capacity of the entire battery pack. If you have the conditions, you can measure the voltage of each string statically, and it is best to wait for the test when it is fully charged or discharged, so that you can avoid the voltage platform and better judge the Tongsan wheel.

The charging principle of lithium battery pack is that the reputation relies on the different points and beams of the TV to charge.

Lithium battery pack belongs to the chemical galvanic cell is to produce electrical energy through chemical reactions, and the electrode where the oxidation reaction of lithium batteries occurs is the negative electrode, providing electrons; The electrode of the reduction reaction is positive and accepts electrons; It is precisely because of the difference in voltage between the two electrodes that the electrons can move between the two electrodes. The electrons move from a high potential to a low potential. This phenomenon is the opposite of the current moving through the circuit.

The current in the circuit flows from a positive high potential to a low potential. The direction of the current is exactly the opposite direction of the electron. Therefore, the lithium battery is fully voltage unbalanced in order to make the electrons move.

Hope mine, helped.

One of the batteries in the battery pack has a low voltage, if it continues to be used, it will seriously affect the life of the other batteries in the battery pack, and must be replaced as soon as possible.

1. Affect the battery life of the entire battery pack.

2. When the charging potato is pure and empty, the time of full charge is not normal, which will either cause other batteries to be fed, or cause other batteries to be overcharged.