You are too modest. If you were stupid, could you still make a mobile power supply?
Required materials:
Lithium battery charging board;Lithium battery charge and discharge protection circuit board (if it is a lithium battery with built-in protection board, this material can be omitted 3.7V → 5V boost circuit board (the output of this circuit already has a USB socket Charging circuit board lithium battery (some ICs integrate the charging circuit and boost board); /p> Lithium battery (if you have it, you can omit this material. But it is not recommended to use used batteries). .The battery life of the mobile power supply made with used batteries is too short and the meaning of the mobile power supply is lost. Power display circuit lithium battery Shell Wires Soldering iron, soldering wire and flux.Production steps:
Connect the battery terminal of the lithium battery charge and discharge protection circuit to the lithium battery. You can decide to use a single lithium battery or multiple lithium batteries in parallel. according to your needs. If the lithium batteries need to be connected in parallel, find metal connectors for the parallel connections of the lithium batteries and butt solder the connectors on both ends of the battery. If the battery has a charge and discharge protection circuit inside, this step can be omitted.
Connect the charging terminal of the lithium battery charge and discharge protection circuit to the output terminal of the charging circuit. If the battery has a charge and discharge protection circuit inside, you can directly connect the poles inpositive and negative of the battery at the output of the charging circuit.
Connect the output terminal of the lithium battery charge and discharge protection circuit to the input terminal of the boost circuit board. If the battery has a charge and discharge protection circuit inside, you can directly connect the positive and negative poles of the battery to the input terminal of the boost circuit board.
Connect the positive and negative plates of the battery to the lithium battery power display circuit;
Connect the input interface of the charging end , the USB plug interface of the output end and the indicator light or power display indicator on the case opening location. Put these electrical devices and lithium batteries in a case and secure them.
In this way, a mobile power supply is completed.
Of course, if you wish toTo make the different circuit boards mentioned above, you will need more components. Generally, most components used today are patch components, which you cannot solder by hand. If you want to use separate components, the volume will be too large after making it, and you need to find the corresponding circuit diagrams and purchase the components separately, which is quite difficult. I won't explain it in detail here.
● ?I hope my answer can be useful to you.
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● ?The above content is written based on from personal experience of "Stupid, I don't know", only represents personal views and opinions, no one can edit, delete or add at will; plagiarism is strictly prohibited; If you need to cite, please indicateThe source.
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Currently, some brands of cell phones we buy, such as Apple, Nokia, etc., come with an original battery when purchased, but the functions of cell phones become more and more difficult. The more powerful it is, the relative power consumption also increases. It is often difficult for an original battery to meet our needs. So we might as well have enough food and clothing and make a spare battery ourselves. First of all, before making a lithium battery, we need to find a lithium battery core that is similar in size to the original battery. The capacity of the battery core may be similar to that of the original battery, or it may be larger than that of the original battery. the original battery. After finding the battery core, we need a battery box to storethe core of the battery. We can find a case identical to the original battery case, or a scrapped battery case of the same model, as long as the case is intact. To put it bluntly, we mainly replace a lithium battery cell with the battery. We need to be careful here. If you want to make a better lithium battery, I suggest you go to a regular manufacturer to buy lithium battery cells and then make it. news. The performance of the lithium battery is almost the same as the original battery. But another thing to note is whether the original battery has some functions, such as battery power detection, charging signal and other similar functions. For example, our original battery has battery return function, so when we install this homemade battery on the mobile phone,the mobile phone may still display error messages such as low battery and needs to be charged, and may also cause the mobile phone. receive error messages. As a result, the phone keeps turning off automatically. It is difficult for us to make lithium batteries ourselves in this situation, but if some functions do not affect the normal operation of the mobile phone, for example, some mobile phone lithium batteries will detect the battery temperature and the 'will display on the screen. mobile phone, like this function, if the phone does not receive feedback about this function in time, the phone will still work normally. We can completely ignore this function. Lithium battery cells currently on the market in principle only provide certain standard functions of lithium batteries. Second, when we buy cellules of lithium battery, we also purchase corresponding lithium battery protection board, and then combine them to ensure the safety of the produced lithium battery. It may not be very beautiful in terms of appearance when manually connecting the protection plate and the lithium battery, but it is very practical. We can use electrical tape to secure it inside the battery case. In this way, the lithium batteries we manufacture are both practical and safe.