Many people have bad habits, often people do not put the battery of the electric car on the car at home, the air switch is not turned off, and they will not ride for a few months. When I came back to ride a few months later, I found out that the car had no electricity and could not be charged. The charger is plugged in, but it is always a green light, even if it is plugged in for 24 hours, because the battery voltage is too low, and the output voltage of the charger is too large, the charger cannot charge the battery.
This situation is what people usually say that the battery is "starved to death". The voltage of this battery block battery is generally only about 5.6V, and will not exceed 6V. For such batteries, most of them are battery replacements. However, it is a pity to replace a set of batteries for hundreds of times, especially for batteries that have just passed the warranty.
Here are five good ways to save most of these "starved" batteries. Note that most are not 100%
1. Series method. A 12-volt battery of normal voltage is additionally connected in series on the entire battery. For example, if the original car is a 48V-20AH battery, then we will connect another 12V-20AH battery in series. A 12V battery with sufficient power has a voltage of about 13V. After the series connection, the voltage of the entire battery can be increased, and then it can be charged with his original charger. It is a red light, and you can charge the battery at this time. When the charger turns green, remove the other battery connected in series. Then just charge it normally.
Second, the parallel method. This method is a little more troublesome. For example, the vehicle was originally a 48V-20AH battery, and we connected another group of 48V-20AH batteries in parallel. Everyone knows that the voltage in the parallel circuit is equal, and the high voltage terminal will flow into the low voltage terminal. This method is also used by many battery dealers to detect batteries that are completely discharged. Then charging can also achieve the purpose of charging. This principle follows, and a battery is connected in series, the principle is similar. It also raises the voltage of the entire group.
3. Low voltage charging method. Use a small model charger for charging. For example, a set of 60V-20AH batteries, then we use 48V-20AH charger for charging. In most of these cases, it can also be filled. The principle is also similar to the first, the charging voltage is closer to the voltage across the battery
4. Single battery charging method. Charging a single battery with a 12-volt motorcycle charger can activate the battery, but this kind of charging is relatively slow. Generally, it takes more than 7 hours to charge, and the battery voltage will slowly rise to about 12V. If all the single blocks are charged, it takes time.
5. Special charger method. Tianneng charger automatically recognizes the battery voltage. No matter how many volts a group of batteries has, it can automatically recognize the voltage and he can charge it. For example, the original car is a 60V-20AH battery, and now it is less than 30V, it can still be charged inside. As the voltage rises, it fully adapts to the higher first-order voltage and then recharges the battery.E-mail: firstname.lastname@example.org