Как обнаружить потерю заряда литиевого аккумулятора 18650?
1. Потребляемая мощность батареи: напряжение на батарее не растет, а емкость уменьшается. Измерьте напряжение непосредственно вольтметром, если напряжение на батарее 18650 ниже 2,7 В или напряжение отсутствует. Это означает, что батарея или батарейный блок повреждены. Нормальное напряжение составляет 3.0V ~ 4.2V (обычно батарея 3.0V отключает напряжение, батарея 4.2V полностью заряжена, а некоторые имеют напряжение 4.35V).
2. Если напряжение аккумулятора ниже 2,7 В, вы можете использовать зарядное устройство (4,2 В) для зарядки аккумулятора. Через десять минут, если напряжение аккумулятора восстановилось, можно продолжить зарядку до тех пор, пока зарядное устройство не покажет, что он полностью заряжен, а затем проверить полное напряжение.
Если напряжение при полной зарядке составляет 4,2 В, это означает, что батарея в порядке. Возможно, при последнем использовании потребление энергии было слишком большим, и батарея отключилась. Если напряжение полного заряда намного ниже 4,2 В, это означает, что батарея повреждена. Если батарея использовалась в течение длительного времени, можно судить о том, что срок ее службы истек и емкость в основном исчерпана. ее следует заменить. В принципе, починить ее невозможно. Ведь литиевые батареи имеют срок службы, не бесконечный.
3. Если при измерении литиевого аккумулятора 18650 на нем отсутствует напряжение, то на данный момент возможны две ситуации. Одна из них заключается в том, что батарея изначально была хорошей, а причиной ее разрядки стало длительное хранение без питания. У такого аккумулятора есть определенная вероятность восстановления. Как правило, она активируется импульсом литиевой батареи. С помощью прибора (прибор для зарядки и разрядки литиевых батарей) можно зарядить батарею несколько раз за короткий промежуток времени. Как правило, стоимость ремонта невелика, и лучше купить новый. Другой вариант - батарея полностью изношена, сепаратор батареи разрушен, а положительный и отрицательный электроды замкнуты. Починить такое невозможно, просто купите новый.
Принцип метода ремонта литиевых аккумуляторов 18650:
1. Металлическая поверхность литиевого аккумулятора 18650, который использовался в течение длительного времени, в определенной степени окисляется, что приводит к плохому контакту между аккумулятором мобильного телефона и мобильным телефоном, и время использования литиевого аккумулятора сокращается. Ржавые вещества улучшают контакт аккумулятора с телефоном.
2. Низкая температура может изменить электролит внутри литиевого аккумулятора и способствовать химической реакции только что замороженного аккумулятора. Использование литиевых батарей фактически представляет собой процесс зарядки и разрядки. В это время отрицательные и положительные заряды в батарее сталкиваются друг с другом. Когда литиевая батарея помещается в среду с низкой температурой, микроструктура литиевой пленки на поверхности литиевой батареи и электролита, а также их границы раздела значительно изменяются, что приводит к временному бездействию внутри батареи и уменьшению тока утечки. Поэтому после повторной зарядки время работы телефона в режиме ожидания увеличится.
Срок службы литиевого аккумулятора составляет около 600 циклов. Если заряжать слишком часто, тепловое движение молекул постепенно разрушит микроструктуру внутренней молекулярной структуры, и эффективность хранения электрических зарядов будет постепенно снижаться.

Nowadays, many rechargeable electrical appliances in life use lithium batteries, such as soft packs, cylindrical, rectangular and so on. Among them, cylindrical lithium batteries are divided into various models according to their size, such as the most common 18650, 22650, 32650 and so on. The number 18 in the model like 18650 indicates the diameter of the battery, 65 indicates the length of the battery, and 0 indicates that the battery is a cylinder.

The voltage of a single-cell lithium battery is generally 3.2V to 3.7v, and the voltage used by many electronic devices is 12V, so we need to use multiple lithium batteries to form a group to achieve 12v, and the lithium battery assembly also needs to be equipped with a protective plate.

The main purpose of the protection board is to play overload protection, short circuit protection, overheat protection, low voltage protection, overvoltage protection, battery balance, overcharge protection, etc., mainly to protect the battery from being damaged.

Since the capacity of a single battery is relatively small, 12 32650 lithium batteries are prepared, four are connected in series to form a group of 12V, and then three groups of 12V are connected in parallel to increase the capacity and voltage.

Assembling the battery requires the use of nickel tape, high temperature tape, and battery brackets.

Generally, the connection of lithium batteries is to use spot welding to bring the nickel to the point. If there is no spot welding machine, you can use sandpaper to polish both ends of the battery, and then you can use an electric soldering iron to weld.

Get the battery line, measure the voltage, and see if the capacity is the same. Don’t put the different ones together.

Then install the battery and battery holder and arrange them in a positive and negative order.

Then wrap the heat resistant tape around it.

Connect the batteries with nickel tape, a soldering iron will do without a spot welder. By the way, stick the protective plate on top of the tape.

For the effect of spot welding of nickel strips, it is necessary to distinguish which one is connected with which one, otherwise it will cause a short circuit.

Then solder the protection board and the plug. Generally, the protection board will indicate the connection method in detail, and it is enough to connect with wires.

If you feel that one plug is too few, you can add another one, and the 12V lithium battery is completed.

Talking about charging Li-Polymer batteries, we decided to list our 5 tips for charging Li-Polymer batteries. Now because almost all drones use lithium polymer batteries (LiPo), only lithium polymer batteries are discussed in this article.

1. First make sure you are using the correct charger.

Charge any polymer lithium battery at 1C, almost all drone lithium batteries can be charged at 1C and should be charged at that rate. 1C charging does take a bit of time, but this charging speed is the easiest for your lithium battery charger and won’t cause overheating. This charging rate will give your battery the longest life possible, letting the balance port do its job. For example, a 3400mAh battery charging at 1C sets the charger to a 3.4 amp charge rate.
Both the battery and the battery pack are charged in a fireproof bag during charging, and I don’t see any reason why the battery should not be charged in a fireproof bag. If your charger comes with a temperature probe, be sure to put it in the bag. If everything is packed in a fireproof bag, you can easily and complete the charging.

2. Don’t let your battery go below the minimum voltage.

It’s a flight issue, not a charging issue, but it needs to be addressed. When flying, try not to let the battery drain until the speed control starts to turn off, unless you replace it. Then you have more time, more power until you land the drone. This avoids drone fried chicken, and you can control the minimum speed cutoff, set above the minimum voltage of the battery pack to allow some extra time to set the landing. I like to time my first flight until the speed control cuts off and then set my timer for a minute before the launcher and on all voyages after that I find that the launcher timer is off as soon as I land mine drone.

3. An accident will happen unless the manufacturer’s battery allows it.

Charge the battery above 1C, if the battery is using a higher charge rate, this can save a lot of time when needed. Try not to charge these batteries with a higher rating if you don’t need to. But other than that, I always use the slower rate at home because it increases battery life.

4. Please don’t leave the room when your battery is on the charger.

This is a mistake almost everyone makes, and the number one safety issue when charging. This prevents any minor accident from becoming a major event if not leaving the room. When you are not in the room, while charging, a fire can happen at any time. While charging, you need to be there to monitor your battery. If you must leave the room, stop the charger and disconnect the battery from the charging cable. Then when you go back to the room to charge again.

5. What if your battery has not been used for more than a week, then please charge your batteries, this will keep them balanced and stable.

Storing charge prevents individual cells from becoming unstable and out of balance. I almost always charge my battery and then fully charge it the night before.

Two major reasons affect the service life of 18650 lithium batteries.

Factor 1: The influence of environmental factors at work.

The actual operating environment of the lithium battery will affect the number of battery cycles immediately: the charging temperature of the lithium battery is 0℃~45℃, and the discharging temperature of the lithium battery is -20℃~60℃; during the whole process of charging the lithium battery, do not overcharge , power loss and other conditions; whether it is over-discharge or over-charge, it will cause inevitable harm to the quality of lithium batteries. Naturally, in addition to operational errors in the operation of lithium batteries, such as short-circuit faults, the service life of lithium batteries is also reduced; for battery charging of lithium batteries, everyone should use a reliable lithium battery charging head to charge the battery. In order to better reduce the specific current and voltage between lithium batteries such as 18650 lithium batteries and the universal charger that are not stable, especially for lithium batteries that have just been charged, 30 minutes should be set aside to wait for the battery charging characteristics to stabilize before application, otherwise it will jeopardize battery performance.

Factor 2: Idle and unused factors are harmful.

If the digital technology and electronic equipment supporting the 18650 lithium battery is not in operation, the 18650 lithium battery should be removed from the instrument and equipment; for long-term storage of lithium batteries, the battery must be charged to 50%~60%, before storage. During the period, the lithium battery should be charged once every 1 to 3 months; for long-term storage of lithium batteries, the temperature range of 10 to 25° must be controlled; Place the rechargeable battery in a natural environment such as microwave heating and high pressure. The common problems in the application of several types of lithium batteries can usually be very good to increase the service life of rechargeable batteries. If the lithium battery is not applied standardly, it will actually cause great damage to the lithium battery, and it is difficult to ensure the service life of the lithium battery.

In recent years, lithium battery electric vehicles have been the development direction of various countries. It can be seen from the market and the investment of various car companies that they have made efforts in electric vehicles. Now, there is a trend of lithium battery electric vehicles replacing internal combustion engine vehicles in some parts of our country, because lithium batteries have strong sailing ability, ranging from more than 100 kilometers to 500 kilometers of Tesla, and you get what you get for every penny, so in the price It is also more expensive than an internal combustion engine car. So, for lithium battery electric vehicles, how should we use and maintain them?

1. It should be checked regularly during use. You can contact the sales center or the maintenance department of the agent for inspection, repair or matching. If there is a need to replace the new battery, it should be replaced in time to avoid unnecessary troubles during driving. In fact, regular inspections can virtually save you money.

2. It is forbidden to be in a power-loss state. Storing the battery in a power-deficient state is prone to sulfation, and the lead sulfate crystals adhere to the plate, which will block the ion channel, resulting in insufficient charging and a decrease in battery capacity. In this case, the longer the idle time, the more severe the battery damage. To have a good battery, we should recharge it once a month.

3. Try to avoid large current discharge. When starting, going uphill, or carrying people, we should try to reduce the amount of slamming on the accelerator, because this will instantly discharge a large current and damage the physical properties of the battery plate.

4. It is forbidden to expose electric vehicles in the sun. An environment with excessively high temperature will increase the internal pressure of the battery and cause the battery to lose water, causing a decrease in battery activity and accelerating the aging of the plates.

5. Electric vehicles should be cleaned in accordance with normal car washing methods. During the cleaning process, more attention should be paid to the water flowing into the charging parts of the car body to avoid short circuit of the car body lines.

In summary, we can use and maintain lithium battery electric vehicles from these aspects to increase its service life.