Electric vehicles have become a travel tool for more and more people, which is convenient and fast. However, as the electric vehicle is used for a long time, the battery sometimes slowly develops some problems. Follow Serena teacher to teach you how to use, maintain and repair the battery of electric vehicles.
Troubleshooting
(1) The range of the electric vehicle begins to shorten (or the battery capacity is not less than 70%), indicating that the battery begins to lose water and vulcanize, and it is necessary to replenish water or add a small coppersmith nano-carbon sol battery activator.
(2) The stroke of the electric vehicle is shortened by less than half (or the battery capacity is not less than 50%), indicating that the battery plate is severely vulcanized and slightly softened. Various battery repair fluids should be added immediately.
(3) The stroke of the electric vehicle is shortened by more than half (or the battery capacity is less than 50%), indicating that the battery plate is vulcanized and softened seriously. The effect of adding various battery repair fluids is not obvious, and the method of battery reassembly is required.
A: Select the bulging battery and replace it with the old one. The load voltage of the exchanged battery is 11.4V-12.7V, and the terminal voltage is about 13.2V.
B: Drive the battery car until it can’t run, set up the battery car to idle, measure the voltage of each battery separately with a multimeter, select the battery with the lowest voltage, and replace the old one with the old one. The load voltage of the replaced battery is 11.4V-12.7V, The voltage is around 13.2V.
(4) The stroke of the electric vehicle is shortened by more than 3/4 (or the battery capacity is lower than 30%, the battery shape is bulging, and the battery leaks), and the repair is abandoned and scrapped.Also read:Wall Mount 48V 100ah Lithium Iron Phosphate Power Wall
Troubleshooting
1) Imbalance repair method: Find batteries with the same capacity, voltage, self-discharge, battery internal resistance, etc. and use them together.
(2) Loss of water—repair method: Pry open the cover above the battery, open the rubber cap, and expose the vent hole. You can see the inside of the battery through the vent hole. water. The plate of the battery is wrapped with white glass fiber cotton, and it should be wet under normal conditions.
Use a dropper to suck distilled water into the battery through the vent hole. Cover the vent hole of the water-filled battery with a breathable shield to prevent dust from falling into the vent hole. It is best to use medical double distilled water. The principle of hydration is rather less than more. If it is not enough, you can add more. If it is too much, the specific gravity of the acid will drop, and the battery capacity will be insufficient.
Special Note: Use glass, plastic and other straws for hydration tools. It is recommended to use medical disposable syringes, which are easy to use and easy to measure. Do not use any metal-containing utensils for water replenishment tools. The metal needle should be removed from the syringe, and a plastic tube should be used before use.
(3) Sulfation—repair method: repair the vulcanized battery with a Kedi repair instrument, use fuzzy digital control theory, and measure the state of the battery to continuously emit positive and negative frequency-converting particle waves while charging and discharging. In 20 hours, remove the hard lead sulfate after crystallization in the battery.
(4) Plate softening—repair method: After discharging the battery to 10.5V, discharge it deeply with a light bulb for 1-5 hours. Then use the activator to activate the repair.
(5) Short circuit—repair method: Water batteries can be drilled clearly to get out the short-circuited lead powder! Electric vehicle batteries can quickly short-circuit the positive and negative poles and burn the short-circuited place!
(6) Open circuit - repair method: 100A detects that the battery voltage 0V is an open circuit, use a single measurement method, use a multimeter to measure the open circuit, and weld it.
Daily maintenance
(1) High temperature exposure is unacceptable
Putting the electric car directly in the sun, the probability of battery scrapping is very high, and even the electric car battery may catch fire at high temperature, so it is necessary to avoid high temperature exposure.
(2) Do not charge at high temperature
Hot weather, coupled with the heat generated during charging, will lead to very high temperature on the surface of the battery, scald the protective shell on the surface of the battery, or even catch fire, so be sure to charge in a cool place when charging.
(3) Do not charge immediately after driving
The temperature of electric vehicles is very high after driving at high temperature. If they are directly charged, the temperature of the battery will continue to increase, even exceeding the critical point, and eventually spontaneous combustion.
(4) Pay attention to the use of chargers
Electric vehicle batteries all have a certain degree of matching. Different batteries and chargers have different matching degrees. If they are used in combination, it is easy to cause a short circuit or insufficient charging.
(5) Pay attention to the charging time
The longer the idle time in the power-deficit state, the more serious the battery damage will be. When the battery is not in use, it should be charged once a month, which can prolong the service life of the battery.
(6) Periodic inspection
During use, if the cruising range of the battery suddenly drops sharply, it is very likely that there is a problem with the battery in the battery pack. At this time, you should go to a professional battery repair organization for inspection, repair or assembly in time.
(7) Do not discharge with high current
When electric bicycles start, carry people, and go uphill, it is best to use pedals to assist, and try to avoid instantaneous high-current discharge.
(8) Reasonable charging
It is best to charge the battery once when the discharge depth is 60%~70%, and the charging time is generally about 8~10 hours.Also read:48V Lithium ion Battery for Electric Bike
Add repair fluid
- Add tools:
It is usually injected with a syringe (the needle of the syringe needs to be removed) to install a plastic tube or pour it with a non-metallic instrument such as a plastic funnel.
- Add steps:
(1) To open the exhaust valve of the lead-acid battery, it can be roughly divided into two types: one is the prying type, which is to pry off the vent hole cover with a sharp instrument; The vent cap is unscrewed.
(2) According to the additive amount of the repair fluid, fill it into the battery vent respectively. If the battery loses water seriously, it is necessary to add supplementary liquid after adding repair liquid to the internal diaphragm of the battery. It is strictly forbidden to use ordinary drinking water or low-quality lead-acid battery replenishment fluid, otherwise it will cause serious damage to the lead-acid battery.
(3) Install the battery vent cover and let it stand for 2 hours before use. The longer the standing time, the better the repair effect.