How to Discharge a Screwdriver Battery Properly
Energy Storage Information Site
Battery. a dynamic system, discharging, gives off energy received during a charge. In some cases, it is required to discharge the battery fully or partially by force. We will try to explain how to properly discharge an acid, nickel-cadmium, lithium battery for a phone, screwdriver, car.
How to quickly discharge a battery
Each type of battery has a lower voltage limit at the terminals, allowing you to recharge the device. The device is considered to be completely discharged, with energy taken to this verge. So for automotive batteries this figure is 10.8 V, for lithium. 2.5 V.
The reasons why you need to discharge the battery are different. Sometimes this operation is required:
- to restore battery capacity;
- health definitions;
- in preparation for repair.
Fast discharge is always accompanied by intensive energy extraction through resistance. But to properly discharge a car battery you need much more resistance than for a phone. The battery of a car can be discharged with a light bulb, while special programs and applications are used for a smartphone. The use of programs allows you to stop the discharge at the threshold of permissible voltage.
How much to discharge the battery quickly depends on the total capacity of the device. The load current must comply with the technical parameters of the device.
Do I need to discharge a new phone battery
There are also budget models of phones with nickel-cadmium batteries. This type of cell has a memory effect. That is, you can charge the element after a complete discharge.
Is it necessary to completely discharge the new nickel-cadmium battery in the phone? Yes, and more than once. Before using the phone, you need to do 3 cycles of full discharge-charge. This is called "rocking" the battery. After that, the battery will work with full capacity, but it will have to be charged every time after a full discharge.
Most push-button phones and smartphones are equipped with lithium-ion and lithium-polymer batteries. These elements do not have a memory effect, they can always be charged, at any charge level. But once every 3 months and at the very beginning, a calibration is carried out for the correct operation of the controller. Do I need to fully discharge the lithium-ion battery on my new smartphone? Specially. no. You can use the gadget from the first minutes, discharge it naturally. After a spontaneous shutdown of the device, you need to charge it to a full charge, no matter how long it takes.
Video: How to Discharge a Screwdriver Battery Properly
What voltage can the battery be discharged to?
We answer the frequently asked question. is it possible to completely and uncontrollably discharge a battery? No, this is only done with disposable batteries. Fortunately, many devices have deep discharge fuses.
Any battery, whether it is a liquid, gel, car, screwdriver or telephone battery, is a dynamic electrochemical system. This means that charge recovery is possible under certain conditions. preservation of a part of the active substance to trigger a reverse reaction. That is why it is important to know how many volts you can discharge a particular battery.
In order to discharge the battery of a screwdriver, it is necessary to take an incandescent bulb with the same voltage indicator as that of the device. Pull the battery out of the case, disconnect it from the tool. Connect the terminals to the bulb. An extinct lamp is a signal that the battery is completely discharged.
You can quickly discharge the battery of your smartphone using the free application Google Play Market and applying the program "Quick discharge". The display will show suggestions. You can use one or more actions. The charge for the current time will be indicated on the screen, you need to set the task to the desired charge. For storage of the battery, you can set the capacity of 40%, for calibration. reduce as much as possible.
A car battery is often discharged by a 21-watt incandescent lamp. But at the same time, you need to monitor the voltage drop at the terminals. It is much more convenient to use Aimaks B6. a universal charger. The critical voltage on the battery of a passenger car is 10.8 V.
How to discharge the battery
The discharge current of any battery is proportional to capacity. But each type of battery has its own minimum reserve capacity. Further battery performance depends on whether the current is selected correctly to discharge the device. How to determine the desired parameter?
For a car battery, the lower limit is determined based on the number of cans. The minimum reserve in one element is 1.8 V, to determine the indicator for the battery, you need to take the amount. For 6 cans it will be 10.8 V. The discharge current is chosen 0.5.0.7 from the capacity.
For batteries made of nickel-cadmium and lithium-metal hydride cells, the minimum voltage of 1 cell is 0.9 V. The charging current is from 0.4 A to 0.1 A. the smaller, the longer the battery lasts.
Lithium-ion cells require a threshold discharge above 2 V. The discharge current should be 0.5.0.7 C. For lithium-polymer cells, a discharge of 2.5 V is harmful. A discharge current of up to 44 A is used, as for ionic ones. All these batteries must be discharged from the balancers, so as not to let one element into the non-recoverable discharge.
We present to your attention a useful visual material on how to properly discharge a battery with a do-it-yourself device