What is a BAK cell?

It's a spare cell.

A battery cell refers to a single electrochemical cell containing a positive and negative electrode, which is generally not used directly. Unlike batteries, they contain protective circuits and housings and can be used directly.

The composition of a lithium-ion rechargeable battery is as follows: cell + protective circuit board. The rechargeable battery is the battery cell by removing the protective circuit board. He is the storage part of the rechargeable battery. The quality of the battery cell directly determines the quality of the rechargeable battery.

Remove the shell of the mobile phone board, and then remove the protective circuit board in the board, and the lithium battery cell will remain.

There are three types of battery cells: aluminum shell cells, pouch cells (also known as "polymer cells"), and cylindrical cells. Generally, mobile phone batteries use aluminum shell cells, Bluetooth and other digital products mostly use pouch cells, and laptop batteries use a series and parallel combination of cylindrical cells.

The so-called fake capacitor is a fake capacitor developed after the electric double-layer capacitor. For Faraday quasi-capacitors, the process of storing charge not only includes storage on the electric double layer, but also includes the storage of charges in the electrode due to redox reactions in the electrode active material. The ions in the electrolyte, generally H or OH- diffuse from the solution to the interface of the electrode solution under the action of the applied electric field, and then enter the bulk phase of the reactive oxide on the electrode surface through the electrochemical reaction of the interface. Since the electrode material is an oxide with a large specific surface area, a considerable number of such electrochemical reactions take place and a large amount of charge is stored in the electrode.

When discharged, these ions entering the oxide will return to the electrolyte, and the stored charge will be released through the external circuit, which is the charge-discharge mechanism of Faraday quasi-capacitors. To put it bluntly, pseudocapacitors are countless small electric double-layer capacitors.

BAK battery is the brand of Shenzhen BAK battery.

Shenzhen BAK Battery **** was established in 2oo1 with a registered capital of 100 million yuan, a Hong Kong-funded and American listed company. It is a high-tech enterprise integrating R&D, production and sales of lithium-ion batteries, the new BAK Industrial Park covers an area of 360,000 square meters, with more than 8,000 registered employees, and the daily output of lithium cells reaches 1.5 million, which is one of the world's largest professional manufacturers of lithium batteries, "BAK battery" won the title of China's famous brand products in 2007, and the company's products are mainly lithium-ion secondary rechargeable batteries, including mobile phone batteries, laptop batteries, digital batteries, power batteries, etc.

About extensions.

bak is a backup file, which is a file format extension, and this type of file is generally found in. The BAK should be preceded by the original extension e.g., or Windows, or it should be a mixture of the suffix of the original file and the BAK, such as the backup file of Proteus. dbk。

If you don't want a backup file, you can open the tool->Parameter Selection-> file on the menu bar, and cancel the check box before "automatically create a backup file when saving", and other software such as CAD, KEIL and other software can also cancel the default backup file through relevant settings.

Meaning of the document. Many software set the creation of backup files as the default configuration of the software, especially a lot of programming, drawing, and design software, which has the advantage that when the source file is accidentally deleted or automatically exited due to the bug of the software itself, it can also be continued on the basis of the backup file, otherwise the previous sweat can only be wasted, thus reducing the loss caused by a lot of misoperation.

File recovery opens.

Generally speakingThe bak file can be restored and opened normally by simply renaming it and replacing it with the format of the file.

As a simple example, it sometimes occurs when an AutoCAD file is moved. bak file, for example, there is a backup file of a file, if you want to restore the backup file to a formal file, you only need to rename the backup file and replace bak with dwg to open it.

Similarly, if it is a backup file of a word file, just replace bak with doc. (can be changed to any file format).

Also, encrypted. The bak file cannot be opened by modifying and renaming, and even if it is opened, it is garbled.