Answer: As shown in the picture above, the left side is a schematic diagram of batteries connected in parallel, and the right side is a schematic diagram of batteries connected in series. The batteries are connected in parallel: the positive electrode of the battery is connected to the positive electrode and the negative electrode is connected to the negative electrode. The parallel battery output voltage -U is the voltage of a single battery. , the output voltage of a single lithium battery is 1.5 V, then -U = 1.5 V. Batteries in series: The batteries are connected end to end, i.e. the pole positive pole of the first battery is connected to the negative pole of the second battery, the positive pole of the second battery is connected to the negative pole of the third battery. , And so on. The output voltage of the battery in series - U is equal to the voltage phase of all batteries connected in series. For example, the tOutput voltage of a single lithium battery is 1.5V, then the output voltage of 8 lithium batteries connected in series - U = 1.5 × 8 = 12V.
After determining the battery output voltage obtained by connecting the batteries in parallel and series, you can make a reasonable combination according to this rule to obtain the battery with the voltage you need. ①. If the single voltage of lithium battery in your hand is 1.5V and now you need 12V power supply, you need to connect 8 lithium batteries in series to get 12V voltage power supply ② If the single voltage of the lithium battery in your hand is 2V and now you need a 12V power supply, you need to connect 6 lithium batteries in series to get a 12V voltage power supply. 2 remaining batteries can be used as replacement backup batteries. . ③ Ifhe single voltage of lithium battery in your hand is 6V and now you need 12V power supply, you just need to connect 2 lithium batteries in series, 8 lithium batteries can be connected in series to form 4 sets of 12 V. Voltage supplies. Of course you can also use these 4 sets of batteries. The groups are connected in parallel and the output voltage is always 12 V at this time.
How to connect eight lithium batteries in parallel or series depends on the voltage of a single battery.
Homemade 12V lithium battery assembly tutorial
Lithium battery assembly materials for electric vehicles require battery box made of stainless steel, whose lithium battery must be a power battery. . The specific assembly steps are as follows:
1. Prepare the required materials.
2. Put 20 batterieslithium in one string, for a total of 8 strings.
3.8 strings of lithium batteries are connected in parallel and isolated with separators and tape.
4. Secure with tape and solder the protective wire in series.
5. Use heat shrink film to wrap and insulate soldered lithium batteries.
6. Connect the protection board! Insulate well to avoid short circuits in lithium batteries.
The tutorial for assembling a homemade 12v lithium battery is as follows:
Materials: 3 18650 lithium batteries, boxes battery operated or magnets.
1. When we prepare three lithium batteries, we must ensure that their models are the same and cannot be mixed. This is because different lithium battery models may have different chemical compositions, voltages and capacities, which may pose risks tosafety if mixed.
2. When assembling the battery box, we need to make sure that the batteries are connected in series. This is because the voltage only increases when the batteries are connected in series. If other connection methods are used, such as parallel or mixed connection, the voltage will not increase and the entire battery system voltage will only be 4V.
3. After installing the battery, use a voltmeter to measure 12 V. It reads 12.33 V.
4. The magnetic beads must be conductive, otherwise they must be wrapped with a layer of tin foil.
5. Connect the batteries in series, with the positive pole facing the negative pole, not the other way around.
6. After successfully assembling the battery box and connecting all batteries, to ensure that the system is operating properly and obtaining the expected voltage, it is recommended to perform a voltage measurement.tension. When measuring, you can use a voltmeter to read the output voltage of the battery box.
If all goes well, we should be able to see a 12V output. This proves that the battery box is connected correctly and the system is working as expected.
Precautions for using lithium batteries
1. Avoid overcharging and discharging:
Lithium batteries have certain charging and discharging requirements. the range, if exceeded, may cause permanent damage to the battery.
2. Avoid contact with high temperature environments:
Lithium batteries may expand, leak, catch fire, and present other safety issues in high temperature environments. -High temperature environments should be avoided.
3. Avoid short circuits:
A short circuit of the lithium battery may cause an explosion and damage.other serious consequences, therefore short circuits should be avoided as much as possible during use.
4. Proper storage:
Lithium batteries should be stored in a dry and well-ventilated environment, away from direct sunlight, and avoid storage near high temperature objects, at moisture and flammable and explosive.
5. Pay attention to the service life:
Lithium batteries have a certain service life after expiration, the battery should be replaced in time to avoid safety problems due to battery aging.
6. Pay attention to the production date:
When purchasing lithium batteries, you should choose products with a more recent production date to avoid purchasing expired or counterfeit products.
7. Pay attention to suitability:
Before using lithium batteries, you should first confirm whether the batrie is matched to the equipment or tools used to avoid safety issues caused by mismatch.
8. Pay attention to how you transport it:
If you need to transport a lithium battery, you should put it in its original packaging to avoid safety problems caused by improper transportation. method.
9. Pay attention to recycling:
When the lithium battery is no longer used, it should be sent to the designated recycling point for recycling and avoid throwing it away or throwing it away at will. avoid Causing environmental pollution and safety hazards.