The lithium battery of an electric vehicle will not work after one year, can it be repaired?

1. Lead-acid battery (including lead-acid gel battery), low cost and stable performance, most of the electric vehicles on the market use this kind of battery.

2. Lithium-ion batteries (often called lithium batteries) have a high cost but large specific energy; High specific power; Low self-discharge; No memory effect; Good cycling characteristics;; Wide operating temperature range; No environmental pollution and other advantages.

3. Crystalline battery, high cost, stable performance, electric vehicles using this type of battery on the market are not common, only a few businesses to configure this high-performance battery, the highest safety factor. The advantages of service life much higher than the first two types of batteries and the advantages of self-healing function are also the leading position in the industry, and the advantages are not possessed by lead-acid batteries, avoiding the disadvantages of lead-acid battery delamination.

Lithium-ion batteries.

Primary battery: Throw away when used up, and cannot be reused, such as: carbon-zinc battery, alkaline battery, mercury battery, lithium battery.

Secondary batteries: rechargeable repeatable users, such as: nickel-cadmium rechargeable batteries, nickel-metal hydride rechargeable batteries, lithium rechargeable batteries, lead-acid batteries, solar batteries, crystalline batteries, lithium iron phosphate batteries.

Power battery module.

Battery cell: The smallest unit that constitutes a power battery module. It is generally composed of a positive electrode, a negative electrode, an electrolyte and an outer shell. It can realize the direct conversion between electrical energy and chemical energy;

Battery module: the combination of a group of battery cells connected in parallel, and the rated voltage of this combination is equal to the rated voltage of the battery cell, and is the smallest grouping of battery cells connected in the physical structure and circuit, and can be replaced as a unit;

Module: A combination composed of multiple battery modules or single cells connected in series.

The C30DB project uses a lithium-ion power battery system, which is a rechargeable battery, which mainly relies on lithium ions to move between the positive and negative electrodes to work. When charging, lithium ions are de-intercalated from the positive electrode and embedded into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; The opposite is true when discharging. Lithium-ion batteries can be divided into lithium cobalt oxide batteries, lithium manganese oxide batteries, lithium iron phosphate batteries and three-element batteries according to the different cathode materials.

Methods for repairing lithium batteries for electric vehicles.

1.Rematching: After the whole group of batteries is damaged, we often carry out charge and discharge testing on the lithium batteries of electric vehicles, and often find that 50 of the batteries in a group of batteries are not damaged.

The reason is that in the series battery pack, the individual batteries lag behind and the function of the whole group of batteries declines, so that the function of the whole group of batteries declines.

2.Water replenishment: A water replenishment of the battery that has been used for about 4 months in the lithium battery of the electric vehicle can extend the service life of the battery, and the extension time can reach more than 3 months on average.

It should be noted that after each water replenishment, the battery is in an overcharged state to change the battery from a "quasi-lean liquid" to a "lean liquid" state, and this overcharging is beneficial to improve the battery capacity.

3.Elimination of vulcanization: Battery repair equipment is used to eliminate vulcanization of the battery.

4.Particle Generator:

The particle generator is connected in parallel to the battery to repair the battery. This method is better for repairing the lithium battery of electric vehicles, but because the repair is relatively thorough, if there is no over-discharge, for the continuous use of electric vehicle lithium batteries, it is often completely eliminated the possibility of battery vulcanization.

Appearance problems: generally do not hurt the scratches, pits, and wrinkles inside the battery, and there is no problem with normal use, once the internal structure of the battery is damaged or the appearance is very bad, there is no room for repair.

Performance problems: the voltage of lithium batteries, internal resistance similar to the problem is actually its own problem, but the previous hidden dangers exposed, such as self-discharge, in the production of lithium batteries, even if it is a small dust mixed in the battery, will have a serious impact on its performance, at the beginning is not obvious, after a long time of use of the problem will slowly show up, this kind of performance problems have no room for repair, I personally recommend replacing the battery, so as not to cause potential safety hazards to personal and property.

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The lithium battery of the electric vehicle is broken, it cannot be repaired, it can only be replaced. It's nonsense to say that it can be repaired, unless the manufacturer replaces it.

Look at what is the fault problem of your lithium battery, the main thing is not the end of the life of the lithium battery, some other fault problems can be repaired, and now the maintenance technology is also constantly breaking through, and the lithium battery can be restored to 80% capacity within the scope of maintenance. If you are interested in lithium battery maintenance technology, you can learn about Brother Xiao Li and pay attention to Brother Li's official account. Brother Xiaoli has a national patent for lithium battery maintenance technology, and I hope the answer will be helpful to you.

It can be repaired, and I have been operating lithium battery sales and maintenance for many years. Let's start with whether the damage is caused by a single group or the whole series of damage. It is necessary to measure voltage, internal resistance, and capacitance, and then match the corresponding material (lithium cell) according to each data.

The equipment to be used includes charging instruments, discharge instruments, multimeters, internal resistance meters, spot welding machines, and various small auxiliary materials. Hope it helps.

Lithium battery Xiaolei studio wholeheartedly serves the 18952217950 of lithium battery enthusiasts

It can be fixed.

The lithium battery of electric vehicle is a power lithium battery pack, and there are more than a dozen lithium battery cells and protection boards connected in series to form a battery pack. One of the cells or protection board has failed, and the entire battery group can no longer work properly. The repair of lithium batteries for electric vehicles is a very technical job that requires professional technicians and equipment to complete.

Note: Lithium-ion batteries are divided into liquid lithium-ion batteries and polymer lithium-ion batteries. The electrolyte of lithium-ion batteries is fluid, so it is more unstable than lithium polymer batteries, and can be caused by a drop from an external force or by using a charger that does not meet the standards**. Many portable electronic products such as mobile phones and laptops use lithium batteries.

Lithium battery damage can not be repaired, if it is an electric vehicle lithium battery, you can open it to check, because it is the voltage obtained by multiple lithium batteries in series and parallel, you can check which lithium batteries are damaged, replace them directly, or whether there is a problem with the line.

Look at what is broken, in principle, within one and a half years of lithium battery pack is recommended to be repaired, more than there is no maintenance value, if the protection plate is damaged, two years can also be repaired,

Lithium batteries are relatively lightweight, but they are very problematic. I bought a lithium battery in a ** in May last year, it was not bad at the beginning, and 80% of the electricity can be left after a trip of 30 kilometers, because I cherish it, so I charge it as I go, and try to keep it fully charged. But the power began to decay a lot in about half a year, and now it can only run 30 kilometers at a time on a full charge, which is worse than a lead-acid battery!

And the lithium battery of the big domestic brand I bought, what wei is that, the name is not allowed here, it can't be a fake! Lithium battery and the current hype of lithium iron phosphate battery, the single cycle may be up to hundreds of thousands of times, but the combination is difficult to say, as long as there is a battery problem, the whole group of batteries will be affected, and I think there should be no domestic manufacturer can ensure the stability of the lithium battery pack, so there will be a large amount of power attenuation after half a year. Personally, I don't think it's necessary to buy lithium batteries, especially to buy lithium batteries online.

Less vulcanization: Equalization charging. The battery can be charged with a general activation charge (i.e., balanced charge), which generally lasts for one to two days before returning to normal.

Heavier vulcanization: water **" charge and discharge. It needs to be charged and discharged with "water**" to return to normal.

The specific method is as follows: first add pure water or dilute sulfuric acid with a density to the rich liquid state to the battery, and then charge it with the current for about 20 hours, drain the flowing liquid, and then conduct a capacity test. Repeat the above until the battery capacity is restored.

Precautions for electric vehicle batteries.

Since the shallower the discharge, the number of cycles will increase significantly. Therefore, according to this theory, frequent charging is beneficial to the cycle life, but as far as the charger used in large quantities on the market is concerned, due to the influence of the most advanced factors and technical level, the charger has defects such as high failure rate, poor reliability and low accuracy.

Therefore, sometimes frequent charging can affect the service life of the battery. The battery is emptied and recharged, although the number of charging times is reduced, but when discharging, due to the difference between the single batteries, some single grid over-discharge may be caused, and the charging acceptance capacity of the over-discharge battery will be greatly reduced, causing the fault of insufficient charging.

You can't get that kind of experience without fifteen years of experience.

The electric vehicle battery has not been used for a long time, and it is enough to relay the power cord of the positive and negative levels.

Flush the electricity every once in a while, otherwise it will be scrapped!

If you don't ride, charge it once a month.

Lead-acid batteries should be done when not in use for a long time:

The battery must be fully charged before being put aside, and it is generally recommended that the battery must be replenished in 2 to 3 months under the premise of full charge, and it is best to charge it once every 1 2 months if possible.

When the electric vehicle is not in use, it needs to be stored in a ventilated and cool room, and the load line is disconnected after the battery pack is fully charged, because the self-discharge of the lead-acid battery itself will cause sulfation, if it is not replenished for a long time, it will be difficult to restore the capacity to affect the life, so it is generally recommended that the battery must be replenished in 2 3 months to facilitate the battery life.

Lead-acid batteries have self-discharge during storage, and long-term failure to charge them for maintenance will cause battery sulfation, or even irreversible sulfation, and the battery will fail due to inability to charge.

At this time, you can try to repair the battery, use positive and negative pulses to depolarize the battery, and then completely discharge, so three cycles, if the capacity has signs of recovery, you can cycle several more times to achieve a better repair effect.

1. Repair the battery with an electric vehicle battery charger

The voltage and current charged by the EV charger match the model and specification of the EV battery. Therefore, it is not possible to repair the battery pack with a car charger, and it is necessary to use an electric vehicle charger with a larger power. Example:

1. The specification of the electric vehicle battery pack is 48V20Ah, which can be charged and repaired with a 60V20Ah battery charger V12Ah battery pack can be charged and repaired with a 48V20Ah battery charger.

Repair principle: The main reason for the decline in battery performance is that the battery has vulcanized, the after-sales maintenance battery of the battery manufacturer, all kinds of battery repairers and repairers on the market are all high-power charging equipment, using "high current, high voltage" desulfurization and repairing the battery. Therefore, the ordinary charger with the first power to charge the battery has the function of desulfurization repair.

2. Other methods:

Repair the battery with hot water from a dry cleaner.

The majority of electric vehicle users realize that the electric vehicle does not travel far, and distilled water needs to be added to maintain and repair the battery. However, the purified water and various replenishment liquids and repair fluids sold on the market have a short-term effect on the battery, and then accelerate the degradation of the battery performance and scrap it in advance. Because these liquids contain metal ions and impurities, they will corrode the battery plates, causing the battery to self-discharge and the active material to fall off, resulting in the permanent scrapping of the battery.

Electric vehicles are a very popular means of transportation for ordinary people, and the reason why they are popular is inseparable from the low **, many people can afford to buy cars.

However, the cost of electric vehicles is very low, more than 1,000 for an electric car, and the electricity cost for a year is only a few dozen yuan, and the electric car is more expensive than its battery. The battery is one of the core components of the electric vehicle, and its cost also accounts for one-third of the vehicle, so now even the thieves generally do not steal the food but directly take the battery, then, as an expensive battery, and as an easily damaged part of the electric vehicle, it is often not durable.

Many people encounter such a situation and go directly to replace the new battery, which will be encouraged by merchants and manufacturers, because the new battery of consumers is more profitable for them, but in fact, often some batteries do not need to be replaced at all, and only some simple methods can be repaired, let's find out. First fix:

To replenish the battery, the distilled water or acid water in the battery plays a very key role, which directly affects the charging performance of the battery, and many battery problems are due to the lack of water.

Therefore, if we can replenish the battery once every six months, we can greatly extend the battery life, and it will not make the battery bulge, etc., and the water replenishment method is also very simple, which can be completed in a few minutes. Second fix:

Reassemble the battery, one of our batteries is made up of several small batteries.

Even if the battery as a whole has the problem of poor battery life, many small group batteries may not be damaged, indicating the problem of individual batteries, resulting in the decline of the function of the whole group of batteries in the series battery, and the individual batteries affect the decline of the function of the whole group of batteries, so it can be solved without replacing the whole group of batteries. The third fix:

To eliminate vulcanization, most of the problems of the battery appear in the vulcanization of the lead plate of the battery, in fact, this vulcanization can be repaired, and only the battery repair equipment is needed to eliminate the problem of battery vulcanization. Fourth fix:

The particle generator is connected in parallel to the battery to repair the battery, which is better for repairing the battery, and must be discharged after repair, so that the battery can be "resurrected" in full blood.

The above is a few simple repair methods for the current battery, in fact, the battery is an electronic device, and the problem can be found to repair and use again, but because people don't care about hundreds of dollars now, there are also merchants who are not willing to add trouble to themselves.

Therefore, many batteries are actually just a small problem and are sent to the manufacturer for secondary use, of course, for direct replacement or repair and reuse, which method is better can only be said to be benevolent and wise.