The 18650 lithium battery has two voltages. The rated voltage of lithium iron phosphate is 3.2V. The rated voltage of other materials such as ternary is 3.7V\x0d\ To assemble a 12V lithium battery, if it is a lithium iron phosphate battery. material, 4 strings means that the negative pole of the battery is connected to the positive pole of the next section, and so on, a total of 4. The positive pole of the first section is used as the positive pole of the battery, and the Negative pole of the fourth section is used as the negative pole of the battery pack. Its voltage range is 8 to 14.4 V; the ternary material is similar but has one less section, and its voltage range is 9 to 12.6 V. The two voltage ranges above are calculated with a protection board. \x0d\There is another thing to note about the lithium battery combination, because the lithium battery itself cannot be overcharged. PrProtection related to over-discharge and short circuit, so a protection board should be added.
Is it possible to use 9 soft cells to make a 12 volt battery?
All lithium battery packs are assembled from a single lithium battery depending on the voltage and capacity requirements;
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For example, the voltage of a single lithium battery obtained is 3.5 V and the capacity is 2000 mAh . Then the voltage of 12V requires 4 batteries to be connected in series to meet the voltage requirements. 2 Ah, which is a series;
A 30 Ah lithium battery requires a 30/2=15 series and a parallel connection to form a battery;
A total of 4 *15=60 Simple lithium batteries are required.
For reference.
The manufacturing cost of 18650 ternary lithium battery cell
Yes. A 12 volt battery can consist of 9 cSoft-packaged cells. The battery core is a lithium polymer battery, commonly known as a soft-pack lithium battery. It is the electrical telecommunications used in electric vehicles. The production method is as follows: 3 18650 lithium batteries are connected in parallel to form 1 group. 9 18650 lithium batteries can be made into 3 groups. Then 3 groups can be connected in series to form a battery pack of about 12V.
Can 18650 batteries be used to make cell phone batteries?
Hello, the manufacturing cost of 18650 ternary lithium battery is about 1 yuan/Wh. After all, technology evolves and. Productivity increases and prices fall.
Expansion of knowledge: According to the statistics of lithium-ion battery manufacturers, 70% of the cost of lithium-ion batteries consists of material costs, of which the cathode accounts for 30-40%, and separator accounts for 15-30%, electrolyte accounts for 20-30%, negative electrode accounts for 5-15%, and positive electrode material accounts for the largest proportion. Battery costs are related to a variety of materials and different preparation process technologies. Reducing costs requires cooperation from all aspects. In the cost structure of lithium iron phosphate batteries and ternary lithium ion batteries, there is a certain cost gap due to different cathode materials. The cost difference in other costs such as negative electrode materials, separators, electrolytes, copper foil, BMS, PACK, labor and equipment is not very obvious .
Regardless of the magnitude of the problem, the most fundamental point is the detection of the protection circuit. There are three contacts on the cell phone battery, one pothe positive, one negative pole and one for battery protection.To protect the detection point of the circuit, you can connect the positive and negative poles of the 18650 battery to the elastic tabs of the mobile phone which correspond to the positive and negative poles of the mobile phone battery. However, if the elastic battery detection tab is used, is empty, the phone cannot be turned on. If you don't believe me, turn on the phone. If one of the three battery contacts is saved and then put back into the phone, the phone will not turn on. My suggestion is: put the fully charged mobile phone battery into the mobile phone, then connect three fully charged 18650s in parallel (all four batteries are fully charged so that they have the same voltage, and one will not charge the other when connected parallel), the positive and negative electrodes are s.wire-welded to the solder joints of the positive and negative electrode springs of the mobile phone, so that the four batteries are connected in parallel to power the mobile phone, and the protection circuit can also be detected. In theory, it works, you can try!