Can an electric car be charged at 35 degrees?

1, don't change the charger casually, and don't dismantle the controller for speed limit.

Chargers from various manufacturers generally have personalized requirements, so don't change chargers at will under uncertain circumstances. If the mileage is required to be long, it is necessary to equip multiple chargers for charging in different places, so the charger for recharging during the day is supplemented by another charger, and the original charger is used at night. Canceling the speed limit of the controller can improve the speed of some cars, which will not only reduce the safety of cars, but also reduce the service life of batteries.

The charger is aimed at the battery and has nothing to do with any other parts. As long as the charger you use is consistent with the parameters required by the battery, what does it matter if you change it? And you can choose some better chargers (such as negative pulse, temperature compensation, time-limited protection, etc.). First, which products are not necessarily original products. Of course, I'm not excluding all of them here, just some individuals. What I said above is reasonable, but I don't fully support it. Because my Wuyang electric motorcycle has a power of 500W, I don't have a speed limit, and the speed is often the fastest (it can reach more than 50 KM/H), but the battery I use will last for two years in another month. It is still quite easy to use now, and it can run for twenty or thirty kilometers. In fact, as long as we pay attention to the use and riding methods, we can effectively solve this problem. Finally, I will write about my experience in using electric cars. Please pay attention.

Why can a good charger extend battery life?

To prolong the service life of the battery, besides riding habit and battery quality, the quality of the charger is more closely related. On the one hand, although the principle of the battery is simple, it has its own charging and discharging characteristics (each charging and discharging process has complex physical and chemical changes), and only a charger that meets this charging characteristic and has pulse repair function can really prolong the service life of the battery; On the other hand, the charger is accompanied by battery charging almost every day. A charger that does not meet the charging characteristics of the battery is equivalent to a "pillow killer" and a "chronic poison" of the battery. Overcharging or under-charging will "poison" the battery for a long time, which is prone to a series of problems that affect the normal service life of the battery, such as water loss and bulging deformation. This is what the industry often says: "The battery is not broken, but charged."

2. Protect the charger.

There are instructions on protecting the charger in the general instruction manual. Many users don't have the habit of reading the instructions, and often think of looking for the instructions after the problems appear, which is often too late, so it is very necessary to read the instructions first. In order to reduce the cost, the current chargers are basically not designed with high vibration resistance, so don't put the chargers in the trunk and basket of electric bicycles. It must be moved under special circumstances, and the charger should be packed with foam plastic to prevent vibration and bump. After many chargers vibrate, the internal potentiometer will drift, making the whole parameter drift, resulting in abnormal charging state. In addition, keep the charger ventilated when charging, otherwise it will not only affect the life of the charger, but also affect the charging state due to thermal drift. This will damage the battery. So it is also important to protect the charger.

I don't comment on these, but I just want to add that it is best not to carry the charger with the car, because vibration will loosen the components with relatively large mass, such as transformers, capacitors, high-power transistors, field effect transistors, adjustable potentiometers, etc., which will lead to the parameter drift or even damage of the charger. The same waterproof, electronic things are like this-afraid of water.

3. charge every day.

Even if your continuous running ability is not long, you can use it for 2 to 3 days on a single charge, but it is recommended that you charge it every day, so that the battery will be in a shallow cycle and its life will be extended. Some early mobile phone users think that it is best to recharge the battery after it is basically used up. This view is wrong. The memory benefit of lead-acid batteries is not so strong. Frequent discharge has a great influence on battery life. Most chargers may charge 97% ~ 99% of the battery after the indicator light becomes full. Although only 1% ~ 3% of the battery is under-charged, the impact on the ability to continue driving is almost negligible, but it will also form under-charged accumulation, so it is also beneficial to continue floating charging as much as possible after fully charging the battery with the electric variable lamp.

If you want to make the battery more durable, don't charge it every day! The battery of electric vehicle should not be charged frequently, because the number of charging and discharging cycles of the battery is certain, generally around 300 times. Frequent battery charging will aggravate the softening and shedding of the active material of the positive plate of the battery, and will also lead to accelerated grid corrosion. Every time you charge the battery, it is equivalent to shortening the life of your battery once, which is what the manufacturer or dealer said, because in this way, the battery can basically pass the warranty period, and its life will last for almost one or two months, and two or three months will pass. I must use it before charging. Of course not for long. You said I sat less, so I couldn't recharge it once every 10 half a day. Generally, I charge it once every two or three days at most. Unless you think there is not enough power left for you. Almost all the better ones, please see the summary below.

4. Charge in time.

After the battery was discharged, the vulcanization process began, and obvious vulcanization occurred in 12 hours. If the battery is charged in time, trace sulfide can be removed. If not charged in time, these sulfide crystals will accumulate and gradually form coarse crystals. General chargers are powerless to these coarse crystals, which will gradually reduce the battery capacity and shorten the service life of the battery. Therefore, in addition to charging every day, you should also pay attention to charging as soon as possible after use, and make the battery fully charged as much as possible.

It's not completely wrong to charge in time. Maybe someone will ask, didn't you just say you didn't want to use it? In fact, there is no contradiction, that is, if it is enough, you should remember to charge it in time when it is almost used, or if it is not enough, you should charge it in time.

In addition, if you can check the balance of the battery regularly, so much the better! Because of the difference between battery/long-term use (undervoltage history, heavy load, etc.). )/charging reason (irregular charging), there is imbalance between batteries, that is, some batteries in a group have reached the undervoltage protection point of 10.5, or even lower, and some have quite high voltage and a lot of electricity. If you charge at this time, the power is the same, but when you use it, the difference will increase again and again because of the uneven power. Eventually, the battery with continuous low voltage is too severely vulcanized and damaged. If you find that your mileage is less than 70%, you can use the battery capacity meter to detect the defective battery and repair it, which can greatly extend the life of the battery.

5, regular deep row.

It is also beneficial to "activate" the battery by periodic deep discharge, which can slightly improve the capacity of the battery. The general method is to discharge the battery completely at regular intervals. The method of complete discharge is to ride to the first undervoltage protection under normal load on flat road. Note that we particularly emphasize the first undervoltage protection. After the first undervoltage protection, the battery voltage will rise after a period of time and return to the non-undervoltage state. At this time, if the battery is reused, it will cause great damage to the battery. After fully discharging, fully charge the battery. You will feel that the battery capacity has increased.

Yes, but don't repeat it so much. Remember to "charge in time". As for the cycle, how often, please see the summary.

6. Develop some good habits of saving electricity.

Use taxiing whenever possible. When going downhill, power off and slow down as early as possible. Enter the taxi in advance when you are about to meet the traffic lights, and try to reduce the brakes. A friend told me that he would rather turn the bay one more time than step on the brakes one less time, which makes sense. It is best to add riding assistance when starting, which can not only improve the starting speed, but also reduce the power loss and life loss of the battery.

When the car is running, it is not advisable to start and brake frequently, because it will start after braking, especially at the beginning, and the current is very large, which is equal to the current limit in a braking time.

7. Pay attention to the charging environment.

The optimum ambient temperature for charging is 25℃. At present, most chargers have no automatic control system to adapt to the ambient temperature, so most chargers are designed according to the ambient temperature of 25℃, so charging at 25℃ is better. Otherwise, it is inevitable that there will be problems of insufficient charging in winter and excessive charging in summer. However, when the ambient temperature is really lower than 25℃, there will inevitably be problems of overcharging in summer and undercharging in winter. Fortunately, most families now have indoor temperature regulation conditions, so it is best to arrange the battery and charger in a ventilated temperature regulation environment when charging. In particular, in the northern winter outdoor low temperature state, the battery enters the greenhouse, and the surface will be frosted and dewed. In order to avoid the leakage of the battery caused by frost and dew, the battery should be recharged after the temperature of the battery is raised to close to the indoor temperature and dried.

Note: The battery charging voltage is inversely proportional to the ambient temperature.

The calculation of the maximum charging voltage (UMAX) and floating charging voltage (UF) of 36V battery at different temperatures (TEMP) is given below.

Maximum temperature

0 46.20 42.48

10 45.36 4 1.58

20 44.40 40.86

25 44.25 40.50

30 43.74 40. 14

35 43.20 39.78

8, make full use of maintenance conditions

Many dealers of electric bicycles can provide battery overhaul and maintenance services, and we should make full use of these services. Some brands of electric bicycles put forward battery maintenance. For example, regular maintenance of the battery can reduce damage to the battery. Repairing the state of charge of the battery can alleviate the failure of "battery backwardness", which is easy for dealers with maintenance ability. For water loss, it is better to replenish water when battery capacity is 70% than when battery capacity is 40%. Even some brands of products suggest that not repairing the battery within the specified time is equivalent to giving up the warranty period of the battery. Let consumers suffer losses that should not happen. Therefore, consumers should make full use of battery maintenance conditions to extend the service life of batteries.

Through these methods, users can greatly extend the service life of batteries. Some users have short mileage and long battery life, and some problems are relatively difficult to find. Therefore, the "deep discharge" measure mentioned in Article 4 is also an effective way to find the battery problem in time, so it is very difficult not to wait until the battery problem is serious.

Reference: /z/q5753 170 1.htm

In addition, you have to refer to the instruction manual of your electric car. Best wishes.