Electronic terminal and charging device

Abstract

The invention relates to an electronic terminal and a charging device. The electronic terminal comprises a charging control unit, a charging input connector, and a physical communication coding and decoding unit, a communication line is arranged between the charging control unit and he charging input connector, and the physical communication coding and decoding unit is arranged on the communication line and used for increasing the level noise margin of the charging input connector accessed to communication signals. The charging device comprises a controllable variable-voltage output module, an output control and detection unit, a charging output connector, and a physical communication coding and decoding unit, the controllable variable-voltage output module is connected with the output control and detection unit and used for performing variable-voltage output of an accessed power supply according to control signals of the output control and detection unit, a communication line is arranged between the output control and detection unit and the charging output connector, the physical communication coding and decoding unit is arranged on the communication line and used for increasing the level noise margin of the charging output connector accessed to the communication signals, and the communication stability is improved.

Description

technical field [0001] The present invention relates to the technical field of charging, and in particular, to an electronic terminal and a charging device. Background technique [0002] With the improvement of the configuration of portable electronic terminals, especially intelligent electronic terminals, the consumption of electricity is also increasing. In recent years, the battery capacity enhancement technology with the same volume has encountered bottlenecks, and can no longer meet the battery life requirements of intelligent portable electronic terminals. It is getting longer and longer, which has seriously affected the user experience. [0003] like figure 1 Shown is a block diagram of an example charging environment for an electronic terminal in the prior art. The environment includes a charging device 10 capable of providing charging current via a charging output connector 11 . The charging device 10 may have a power plug 13 to obtain power from a conventional ...

AI Technical Summary

Problems solved by technology

The low-level noise tolerance and high-level noise tolerance of the interface are insufficient. When the IRdrop of the cable is greater than a certain level, the communication between the portable electronic terminal and the charging device cannot be carried out stably.

[0013] The second prior art realizes the one-way communication with the charging device by alternately pumping power with a certain regular high current and small current at the electronic terminal. The first disadvantage is that only the portable electronic terminal can communicate with the charging device in one direction, and the charging device cannot For portable electronic terminals to send signals, the second disadvantage is that the transmission instructions are limited, and the intensive adjustment of the output voltage of the charging device cannot be realized. The second disadvantage is that the charging current inevitably decreases during the transmission process, prolonging the charging time

[0014] The third prior art achieves communication between the portable electronic terminal and the charging device by alternately changing the levels of the first signal line and the second signal line through the portable electronic terminal. It is impossible to send signals to portable electronic terminals. The second disadvantage is that the transmitted instructions are limited, and the intensive adjustment of the output voltage of the charging device cannot be realized.

[0023] It can be seen that no matter whether high-voltage fast charging or low-voltage fast charging is used, when the charging current is large or the number of insertions increases to a certain extent, the communication level between the single-chip microcomputer placed on the charging device end and the single-chip microcomputer placed in the electronic terminal has exceeded Its normal tolerance range, the communication will not be stable

[0024] 2. The problem of high cable power loss and low transmission efficiency during low-voltage fast charging

[0029] 3. Low-voltage fast charging requires high cable impedance, and the charging cable has poor versatility.

[0032] 4. Low-voltage fast charging is sensitive to changes in the impedance of the charging connector, and the service life of the charging cable is short

With the increase of the number of plugging and unplugging, the pins at the contact position of the connector are worn, oxidized, dirty, and deformed. When the impedance of the connector circuit increases to 40mR, P=I 2 *R power loss is 0.81W. Due to the small metal area of ​​the MICRO connector and poor heat dissipation, the power loss of 0.81W has exceeded the preset safety value. This cable will not continue to be used for low-voltage fast charging.

[0034] 5. Existing high-voltage charging technology has a big problem with mobile phone heating

Taking the ambient temperature of 25°C as an example, the temperature of the mobile phone is 25+27.5=52.5°C. The direct consequence of the temperature of the mobile phone reaching 52.5°C is to affect the comfort of the user's hand-holding. The serious consequence is that the battery expands or explodes after being charged with high temperature and high current. The solution adopted by the high-voltage fast charging technology is to use a temperature sensor to detect the temperature of the mobile phone, and reduce the charging power when it reaches the preset value, which can control the temperature rise within a safe range, but at the same time prolong the charging time and slow down the fast charging speed

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