What should I pay attention to using a universal electric vehicle charger using a universal electric vehicle charger?

著者：Iflowpower – Portable Power Station ပေးသွင်းသူ

The charger is one of the four core components of the electric vehicle electrical system. The performance of electric vehicle charger is directly related to charging effect, which is related to battery life. It is related to the safety of the vehicle.

The voltage current is strictly required when the electric vehicle charger is charged, and the voltage current will cause damage to the charger. The performance of electric vehicle charger is directly related to charging effect, which is related to battery life, and is related to the safety of vehicle. First, the general detection of the performance of the charger is good and bad: taking the 48V charger as an example, generally the highest voltage is not more than 59.

6V, greater than this voltage, charging may not turn light; normal low voltage is not less than 55V, low It will cause insufficient charging in this voltage, so it is easy to make battery losses. In terms of current, or the 48V20A charger as an example, the maximum current is not more than 3A, which may cause the battery to lose water earlier, the lowest is not less than 2.1A, lower than this current will cause insufficient charging.

Here are some of the electric vehicle charger universal precautions: (1) 48V new battery requires charger parameters, maximum voltage 58.5-59.7, no less than 58V, less than 58V causes insufficient charging, higher than 59.

7V may cause charging lamp. The turning lamp is about 0.4-0.

7a, the actual voltage is about 55.5V, which is less than 50V will cause insufficient charging, which will cause battery loss. (2) 48V20AH battery requires the maximum current of 2.

4-3.3A, less than 2.2A is slow, and the charging effect is poor, and the battery will also be damaged.

(3) The actual power of only 40, 50 yuan in the market is more than the small, the parameter design is not accurate, and the safety hazard is large, and the high standard is more reliable. (4) Charger regulator circuit failure will cause output voltage 75-130V, rechargeable battery is hot, no light. High quality charger will effectively alleviate such issues.

(5) When the new battery has a 20A battery life mileage less than 30 kilometers 12A battery, please check the parameters of the charger, if you can't judge, please replace the high-quality charger again, select the high-end product, you can solve the problem. (6) When the new battery does not turn, replace another high quality charger test machine. (7) Under normal circumstances, the 48V20AH new battery life is 40-60 kilometers.

The 48V12AH new battery charging time is generally within 10 hours, the mileage reaches 25-40 kilometers, if the normal charging time exceeds, please replace the high quality charger again. (8) There are many charger internal circuits, the input and output connectivity, causing, sometimes charging, sometimes can't charge. Severely affect the battery, or during charging, causing a drum package, if this happens, please replace the charger again.

Next, look at the five methods of charging electric vehicle charger: Reach. Its important feature is that this charging method has a large adaptation **, which can choose and adjust the charging current. Therefore, it is possible to charge the battery of various different situations (such as the initial charging of the new battery, supplement charging of the battery used and the sulfur charging, etc.

). It is especially suitable for charging the battery pack in which a small current length is charged, and it is conducive to the recovery of a slower battery. However, since the charging current in the stage of charging method is too small, the charging current is too large during the post-charging, so the entire charging process is long, the precipitation gas is large, the impact of the plate is high, the energy consumption is high, the efficiency is low (no more efficient 65%), and the entire charging process must have a special personnel.

Therefore, only when the battery is initiated and the battery is used to perform a small current to carry out sulfur charging. The following matters should be paid to the following matters: 1 Due to the variation of constant current charging is charged, the charging current is prevented when charging is too large, and the charging current should be adjusted in time. Moreover, the size of the charging current, the time, the time of conversion current, and the selection of charging termination voltage, etc.

The smallest battery is selected, and when the small capacity battery should be removed, then continue to charge the large capacity battery; 3 charging, once the battery is detected every 2 ~ 3h, if the voltage has reached 2.4V Timely transfer to the second stage charging; Charging; 5-charged battery electrolyte density should meet the requirements, and the density difference between the electrolyte between the monarch batteries should not exceed 0.01g / cm3; 6-free maintenance battery should not be charged with this method.

2, electric vehicle charger constant pressure recharge constant voltage charging means that each single battery is a constant voltage (usually counting the number of single cells)×2.5V) charging. Its important feature is that the initial current of the charging is quite large, the battery electromotive force and the electrolyte relative density are rapid, as the continuation of charging is gradually reduced, only small current is passed in the charging period; the charging time is short, energy consumption Low, generally charge 4 ~ 5h, the battery can obtain 90% to 95% of its own capacity; if the charging voltage is selected, the entire charging process can be completed, and the entire charging process does not require people, so it is widely used to supplement charging.

Insufficient constant voltage charging is: Since the charging initial current is too large, when the battery is too large, it will cause the initial charging current to rise, which is easy to cause overcurrently overcurrent and charging equipment damage. During the charging process, Since the charging current cannot be adjusted, it is not suitable for the initial charging and debris charging of the battery; it is difficult to compensate for the change in battery voltage during charging, it is difficult to complete the capacity of slow battery recovery. Note the following matters with constant voltage charging methods: 1 Correctly select the charging voltage.

If the charging voltage is too high, it will cause the charging current of the charging current to be too large. When it is severe, it will cause a polar bending, and the live ** substance is large and the battery temperature is high. If you are too low, the battery is lowered, resulting in a reduction in capacity, shortened life; 2 The end voltage of the battery must be exactly the same.

3, electric vehicle charger equalization charging About battery pack composed of many monomer batteries, such as fixed-type batteries, after running a certain date, periodically balanced charging. This is because when charging is performed in the same conditions, the live ** material of the polar panel has different degrees of charging. As a result, the active ** substance is incapacitated.

In addition, some monomer batteries will be insufficient in consideration of certain charge and discharge products between monomer batteries. Therefore, the current is continued to charge the current of about 20 h after normal charging, 1 ~ 3h. This charging is also called overcharge.

When the battery is usually used under the same conditions, it is advantageous to perform a balanced charging on battery maintenance. The length of each user has different regulations in the length of the balanced charging time, and some have three months or half the year. In recent years, according to the advancement of battery design and manufacturing technology, the special ** of the battery is not large, so there is an extended trend on the interval of equalization charging.

4. Electric vehicle charger floating charged battery or battery is only used in AC power failure, and its charging mode is a floating type. For example, a voltage of 2.

15 to 2.2 V2.2V is added to a fixed type, and a voltage of 2.

15 to 2.2 V is charged with a continuous minute current. The charger is parallel with the battery, and the charging current is important to supplement the loss of self-discharge, that is, about 10 h rate of 0.

3% ~ 1.0% range, and usual load is burden by the charger, and the short-term load is also powered by the battery. At this time, the charging is automatically charged due to the decrease of the end voltage of the battery.

5, electric vehicle charger constant pressure limit stream charging constant voltage limit flow charge Important is the disadvantage of excessive charging current when remedial constant voltage charging (method is charged with constant pressure), and is connected in series between charging power and is connected between the charging power supply and the rechargeable battery. A resistance (current limiting resistance) from moving adjustment charging current. When the charging current is too large, the pressure drop in the current limiting resistor is also large, thereby reducing the charging voltage; when the charging current is small, the pressure drop on the current limiting resistor is small, the voltage loss of the charging device is also small.

In this way, the charging current is automatically adjusted so that it does not exceed a certain limit. This method is currently widely used in a maintenance-free battery initiation and supplement charging of ordinary batteries.