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48 volt electric vehicles are also divided into electric vehicles with foot pedals and electric motorcycles without assistance. According to tracking feedback information statistics, the reason for the expiration of the lifespan of lead-acid batteries with assistance is mostly due to dehydration and vulcanization. In addition to the above two reasons, the reason for the end of the lifespan of lead-acid batteries with electric motorcycles is also due to frequent high current discharge, which causes the positive electrode plate to soften and the active substance to fall off. This softening of the positive electrode plate is physical damage and cannot be repaired. And dehydration and vulcanization are non physical damages that can be repaired. There is a Jinhai battery capacity restorer produced in Jinzhou on Taobao, which can repair vulcanization and add some water to the battery. The capacity of these four batteries can be restored to about 85%. The following is a review from a friend who purchased a Jinhai battery capacity restorer. From the review, it can be seen that this friend is an insider.

A professional on Taobao commented on the 48V Jinhai battery capacity restorer: "It's amazing. After installing the capacity restorer, I tried to add water to the battery: first, remove the sealing strip of each lead-acid battery section, remove the rubber cap, fill each section with battery refill liquid, charge it in an open manner until it is full, remove the overflow liquid, cover the rubber cap, and seal the sealing strip with AB glue. The capacity increases from 20 liters to 95 liters, which is great. It saved seven to eight hundred dollars in one go. By the way, my battery is 48V20A. Previously, I used an electric wire to string the discharge on both poles of the battery, measured the voltage of each section, and the voltage difference between each section is not significant." If it exceeds one volt, it is recommended that friends check in advance, and the conditions are also simple! Buying an electric heating wire is also cheap, but it can't be replaced for a long time. It only costs about 40 yuan to save a used battery, and with this restorer, it saves a lot of money overall. Thank you for your patent and dedication

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1. The car repair owner said that the battery is not working because those two batteries are outdated, which affects the discharge capacity of the entire set of batteries. The voltage drops rapidly between 11V and 10V, which can easily lead to over discharge and damage.

2. I replaced two old batteries, all four of which are around 12 volts. Add some water, and it's best to use a Jinhai battery capacity restorer to remove sulfurization. The mileage will definitely be more than before, and often not even a little more.

3. Maintenance-free ones also require adding water and removing vulcanization. Open the cover plate on top and you will see six liquid additions. After adding water, use a Jinhai battery capacity restorer to remove the vulcanization of the electrode plate. If you are lucky, the capacity of these four sets of batteries will reach more than 85% of the new battery, saving the cost of replacing the battery by 700 to 800 yuan.

4. His method of replacing old batteries is very economical. But it's not the most economical, the most economical way is to add some water and then buy a Jinhai battery capacity restorer on Taobao to remove sulfidation. This method is the most economical. You will also save a few dollars on the cost of replacing lead-acid batteries like that friend did.

I have been using it for over a year, and almost the entire set of batteries needs to be replaced

Adding liquid or something is only temporary,

The battery is fully charged, usually at this voltage, but after running for a while, it runs out of battery, indicating that the battery needs to be replaced

1. The battery is not working, which means the battery's endurance is not working. If you charge your two low voltage batteries separately, you can still charge them with such high voltage

If the two pieces are better than the original two, then the battery life will naturally increase

3. Nowadays, batteries are maintenance free, unlike the previous ones that require water addition. However, regular liquid addition and maintenance with a repairer can still extend the battery life, which is generally said to be extended by 3-6 months

4. This method is only temporary,

It is best to use a battery level tester to measure the quality of each battery, and then replace it with a new one. Be careful not to turn it on until it runs out of battery. Charge it frequently, but do not charge it for too long

"My hometown is good," said this friend very reasonably, and Mr. Zhao Tieliang's viewpoint is also similar. He believes that using pulses to remove sulfur from lead-acid batteries is non-destructive repair. And for those who have conducted experiments, the following is the content of the pulse de vulcanization experiment he wrote before his death:

The process of conducting an experiment to eliminate sulfurization of the negative electrode plate is as follows:

Firstly, prepare samples of lead sulfide batteries: 200 lead batteries were taken as test samples, of which 100 were subjected to deep cycle life tests without sulfidation to obtain the lifespan of the batteries; In addition, 100 batteries are fully discharged and stored at high temperatures of 40 ℃ for 90 days. According to the Swedish chemist Arrhenius equation, storing at 40 ℃ for 3 months is equivalent to storing at 25 ℃ for 12 months, forming a sulfurized sample of the negative electrode plate of a lead-acid sulfide battery.

Then, using a pulse generator, perform a repair verification test on the sulfur battery sample. While repairing, take samples for capacity recovery testing until the capacity no longer increases.

The third step is to conduct a deep cycle life test on the repaired battery.

Based on the experimental data results, the conclusion of pulse repair negative electrode plate vulcanization is obtained:

The conclusion drawn is that the repair rate of pulse repair for lead sulfide batteries is as high as 97%, and the bridging of lead branches in three batteries leads to a single cell open circuit that cannot be repaired. The average lifespan of repaired batteries is 98% of the average lifespan of new batteries!

Based on this result, the national lead-acid battery industry has confirmed that the results of pulse repair vulcanization are true and reliable.

But there is another situation that you need to pay attention to, which is that there may be a phenomenon of voltage without capacity. Although the voltage of each battery is around 12V, voltage does not represent discharge capacity. Discharge capacity is expressed by capacity, and the configuration of electric vehicle battery packs is also based on capacity. When the voltage is similar, there may be significant differences in capacity, and the capacity may vary between those without water shortage and those without water shortage; Severe and mild vulcanization may have different capacities, so it is best to discharge each battery separately with the same current after being fully charged.

Of course, there must be water loss in old batteries, and in Teacher Zhao Tieliang's post, it has been repeatedly mentioned that water loss in electric vehicles is a major reason for premature failure. It is best to first add water and then use a pulse device to remove sulfur. The lead-acid battery capacity restorer mentioned by my friend above is probably a pulse generation device of this type, specifically designed to prevent and remove sulfur from the electrode plate. Finally, test the discharge time again, which is the test capacity.

By the way, Teacher Zhao also mentioned that after adding water to the dehydrated battery, it must be stationary to ensure that the added water is fully immersed, otherwise the effect will be greatly reduced. My expression ability is limited, it's best for you to search for Zhao Tieliang's technical post under the username ABT-BJ. Please read it patiently and I believe that your future electric vehicle batteries will not cost much money. Because many of the replaced battery packs can be replenished with water, removed from vulcanization, and restored to capacity.

As you said, the boss is not yet black. He only charges you 40 yuan for two 12V batteries. We have to pay an extra 20 yuan here, which is about 60 yuan. This is definitely the most economical way to handle it. Now, a set of 48V20AH electric vehicle batteries in our area costs nearly 600 yuan for the most worn-out brands, such as Tianneng and Chaowei, with the lowest cost being over 700 yuan. Due to lead pollution, the country has recently shut down over 80% of small lead-acid battery production enterprises. The next step is likely to increase prices, so it is even more necessary to learn relevant knowledge.

The 48V battery pack has a voltage of 53.2V when fully charged

The cut-off voltage set for a 48V electric vehicle is 41.5-43.5V. During operation, the cut-off voltage must not be exceeded. Do not leave it idle for a period of time before driving, as it may cause over discharge and be detrimental to battery life.

The highest voltage of the 48V battery pack during charging is 59.2V. After being fully charged and left to stand for a few hours, the voltage stabilizes at around 53.2V.

1. The no-load voltage of the charger - for a three-stage charger, this voltage is the float voltage, usually 13.5v-13.8v for a single battery (usually indicated on the battery, which can also be found in the manual). For 36v, it is 40.5v-41.4v, and for 48v, it is 54v-55.2v. Therefore, considering the error of your multimeter, both 53.6V and 55.6V seem to be normal, after all, they have entered the float charging stage and turned on the light, so the requirements for their values are not very strict.

2. The charging termination voltage of the charger - this voltage is known as the turn signal voltage, usually 14.4v-15.0v for a single battery (usually indicated on the battery, which can also be found in the manual). For 36v, it is 43.2v-45.0v, and for 48v, it is 57.6v-60.0v.

3. The actual charging termination voltage of the charger - for sealed batteries, its value should be 2.4V per cell, which is optimal. Therefore, the corresponding 36V is 43.2V, and the corresponding 48V is 57.6V. But in reality, the reason why this value needs to be appropriately increased is due to considerations of charging time and "full charge", which is 44.4-44.8V for 36V and 59.2V-59.7V for 48V. However, this can easily cause water loss, shorten battery life, and has both advantages and disadvantages. It's not easy to figure it out, just know how this voltage value is determined here.

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