Lithium battery charger and lead-acid charger how to distinguish?

Lead-acid battery and lithium battery charger charging control is different. Since the lead-acid battery charger is generally set to a two-stage or three-stage charging mode, the voltage level of the lithium battery and the lead-acid battery is not matched. There are many kinds of lithium batteries, and battery performance and battery protection board parameters may be different. Therefore, lithium batteries do not have universal battery chargers like lead-acid batteries. Generally speaking, lithium batteries are equipped with a special charger when they leave the factory. In order to protect lithium batteries, special chargers are needed.

Lithium battery charging control is to charge in accordance with a constant current, and then when the battery voltage rises to 4.2V, the voltage no longer rises, the charger detects the current, and if the current is less than a certain value, the charge ends. Lithium is sensitive to overcharge, so the protection circuit is complex. For a single nominal 3.6V battery, the maximum charging rated voltage is 4.2V, and the upper limit of allowable error is not more than 1%.

The ideal charging current of lead-acid battery is pulsed, pulse charging is best with the 50-60HZ mains power supply we use, which is directly rectified and does not filter pulsating DC charging. Because the self-discharge rate of lead-acid batteries is relatively large, constant voltage charging is generally used when power frequency charging is used.

The high frequency switching power supply technology is organically combined with embedded microcomputer control technology, and the intelligent dynamic adjustment technology is used to optimize the charging characteristic curve and effectively extend the service life of the battery. It adopts constant current /W stage/constant voltage/small constant current four stage charging mode, with high charging efficiency, high reliability, easy operation, light weight, small size and so on.

There is a major difference between lithium battery chargers and lead-acid battery three-stage chargers

When the charging current is greater than the set value, only make the charging indicator turn red without changing the output voltage; When the charging current is less than the set value, the charging indicator turns green without changing the output voltage. That is to say, there is a voltage before and after turning the lamp, that is, the voltage limit value calculated before.

Therefore, this current setting value should be called "turning lamp current" is more accurate, about 0.02C. Measured several manufacturers supporting lithium charger, 10Ah lithium battery pack lamp current is about 240mA to 260mA. After the green light continues to charge for some time, the charging current will be close to zero. After the lead-acid battery turns red to green, because the high constant voltage becomes low constant voltage, the charging current will soon be close to zero.

Precautions for lithium battery charging

1. In order to extend the life of lithium batteries, it is necessary to charge and discharge lithium batteries frequently. To develop the habit of charging the electric bike after 80% of the electricity use, you can not wait for the electricity to run out before charging. In addition, lithium batteries should not be stored for a long time.

2. When charging the electric vehicle battery, the electric door lock must be closed, and the battery cannot be inverted. Charging should be filled at one time, should not be divided into multiple charging.

3. Eelectrical appliances should not be stored in a state of loss of power, so the battery is stored when not in use, the battery needs to be fully charged once a month.

4. Lithium batteries need to use a matching charger when charging, because the battery raw materials and lithium battery production process is different, the technical requirements of the charger are not the same, so only the use of a dedicated charger to charge in order to make the lithium battery life longer, and prevent safety risks.

Lead-acid battery charging precautions

1. Do not casually change the charger, do not remove the controller speed limit

If the mileage of the lead-acid battery is relatively long, you can use multiple chargers, and the charger that makes up the charge during the day uses another supplementary charger, and the original charger is used at night. Removing the controller's speed limit, while increasing the speed of some cars, can also reduce battery life in addition to reducing car safety.

2. Protect the charger

The current lead-acid battery charger basically does not do high vibration resistance design, many chargers after vibration, the internal potentiometer will drift, will make the whole parameter drift, resulting in abnormal charging state. It should also be noted that the charging time should keep the charger ventilated, otherwise it will affect the life of the charger and may also affect the charging state. This will cause damage to the battery, so it is very important to protect the charger.

3. Charge every day

Charging every day will make the lead-acid battery in a circulating state, and the life of the battery will be extended. The memory benefit of lead-acid batteries is not so strong, and frequent discharge will have a great impact on battery life. Many chargers are fully charged after the indicator light changes, and the battery is charged at 97% to 99%. Although only 1% to 3% of the electricity is charged, the impact on the endurance can be almost ignored, but it will also form an under-charge accumulation, so the battery is fully charged after the lamp or continue to float charging as much as possible, which is also good for inhibiting battery cure.

4. Charge in time

Timely charging of lead-acid batteries can eliminate not serious vulcanization, if not timely charging, these sulfide crystals will accumulate and gradually form coarse crystals, the general charger for these coarse crystals is powerless, will gradually form battery capacity decline, shorten the battery life.

The above is the difference between lead-acid battery and lithium battery charger. Through the analysis above, we can know that the charger of lead-acid battery and lithium battery can not be universal, in the matter of charging the battery, we must choose a special charger to charge the corresponding battery, to avoid mixing with each other, out of the line safety hazards or accidents.