TW201733236A - Charging method of detecting battery voltage in charging process for adjusting power supply current accordingly capable of preventing sudden temperature rising during a charging process - Google Patents

Abstract

The present invention relates to a charging method of detecting battery voltage in a charging process for adjusting power supply current accordingly, which is applicable to a mobile terminal device and a power supply device. When the mobile terminal device and the power supply device are performed with fast charging, the power supply will stop charging for an interruption period after the power supply has performed charging for a charging period. During the interruption period, the power supply will detect a voltage value of a charging battery in the mobile terminal device and adjust current value for subsequent charging according to the voltage value until voltage saturation of the charging battery is detected. As such, in the fast charging process of the power supply device, the charging battery can be effectively controlled and prevented from sudden temperature rising during the charging process by means of the interruption periods. In addition, the power supply device can also adjust proper charging current according to the current voltage of the charging battery.

Description

Charging method for detecting battery voltage during charging and adjusting supply current

The present invention relates to a charging method, and more particularly to a power supply device that stops power supply for a predetermined period of time during charging of a mobile terminal device, and detects a current voltage of a rechargeable battery of the mobile terminal device within the aforementioned time to adjust subsequent The charging method of the supply current.

In recent years, with the rapid development of electronic and communication technologies, mobile terminal devices (such as mobile phones and smart phones, etc.) have become an indispensable part of most metropolitans. The device and the human hand have become a common sight everywhere in the metropolitan area. Therefore, in the case where people are increasingly relying on mobile terminal devices, the "end-of-life" of the mobile terminal device (that is, in the case of no charging, The time of continuous operation has become a place of attention.

There are many reasons for affecting the endurance of mobile terminal devices, but the main factors include: First, power-consuming electronic components, such as: ever-increasing mobile phone screens, more powerful system chips (System on Chip, referred to as SoC); Second, faster wireless network technology, for example: 4G technology is far more power-hungry than 3G technology; third is more additional features and background programs, such as: Bluetooth (B1uetooth) search, GPS positioning, instant messaging Software (such as: LINE), etc., the industry's power-saving technology can not catch up with the pace of power consumption, resulting in the power provided by the battery of many mobile terminal devices, not enough for the mobile terminal device to use one day, so Avoid the dilemma that mobile terminal devices cannot be used due to insufficient power. When people go out, they usually carry mobile power to enable The mobile terminal device is charged to maintain the "end of force" of the mobile terminal device.

For the description of the charging technology between the existing mobile terminal device and the power supply device (such as mobile power), please refer to FIG. 1 . To avoid the complexity of the drawing, only the mobile terminal device is shown in FIG. 1 . In some embodiments, the mobile terminal device 1 includes the rechargeable battery 11, the general charging circuit 13, and a transmission port 15, wherein the rechargeable battery 11 is electrically connected to the general charging circuit 13, and the general charging circuit 13 can The charging port 15 is electrically connected to receive the current from a power supply device 19 and transmitted to the rechargeable battery 11. Further, the general charging circuit 13 is provided with a battery charging chip 130 (Battery Charger) IC), the battery charging chip 130 can mainly provide the correct charging current and charging voltage required for the rechargeable battery 11, that is, the battery charging chip 130 measures the charging current and voltage of the rechargeable battery 11 so that the charging current and the charging current The voltage remains within the predetermined range of the operator.

In addition, in order to shorten the charging time of the rechargeable battery of the mobile terminal device, many manufacturers have designed various "fast charging technologies". In particular, the basic concept of the "fast charging technology" is in the rechargeable battery. In the range of load, a large current is given to achieve the effect of saturating the rechargeable battery in a short period of time. However, the applicant has found that, as shown in Fig. 1, the current supplied by the power supply device in the existing charging mode, It is necessary to charge the chip 130 through the battery in order to transfer the current to the rechargeable battery 11, which results in inefficient charging and fails to perform the "fast charging technology" expected by the practitioner; in addition, the existing "fast charging technology" is applied. The following problems will still be faced: (1) When the rechargeable battery 11 receives the current, in addition to converting the electrical energy into chemical energy, the internal electrolyte will be converted into heat and dissipated, resulting in the rechargeable battery 11 The temperature rises, so when the current is larger, the amount of heat generated by the rechargeable battery 11 will increase. The service life of the short rechargeable battery 11; and (2) when the voltage of the rechargeable battery 11 approaches saturation, if the continuous receiving of a large current continues, the rechargeable battery 11 is damaged, making the rechargeable battery 11 unusable, or Shorten its service life.

In summary, the related technologies of the existing charging cannot meet the needs of the user and may even adversely affect the rechargeable battery. Therefore, how to effectively solve the above problem becomes an important issue for the present invention. .

In view of the fact that there is still a partial loss between the existing mobile terminal device and the power supply device during charging, the inventor has finally designed the present invention after conducting many researches and tests with years of research and development experience. A charging method that detects the battery voltage during charging and adjusts the supply current to provide a better charging experience for the user.

An object of the present invention is to provide a charging method for detecting a battery voltage during charging and adjusting a supply current according to a method, which is applied to a mobile terminal device and a power supply device, wherein the power supply device is provided with a charging device, and A charging comparison table is built in, the charging comparison table includes a plurality of voltage values and a corresponding charging current value, the mobile terminal device has a fast charging mode and a general charging mode, and is provided with a transmission port and a rechargeable battery, the transmission The tether is electrically connected to the charging port to receive the current from the charging device, and when the mobile terminal device is in the fast charging mode, the charging battery is quickly charged when the mobile terminal device is in the In the state of the general charging mode, the charging battery is generally charged, and the charging speed of the fast charging is greater than the charging speed of the general charging, when the power supply device is electrically connected to the mobile terminal device, and the mobile terminal When the device is in the fast charging mode, the power supply device transmits a first charging current value to the charging device. Battery, and a charging duration Afterwards, the first charging current value is interrupted and continues for an interruption period during which the power supply device detects a current voltage value of one of the charging pins of the charging port, wherein the power supply pin is coupled to One of the power supply pins of the transmission port is electrically connected, and the voltage value of the power supply pin is equal to the voltage value of the power pin, and the voltage value of the power pin is equal to the voltage value of the rechargeable battery, ie, the power supply device And corresponding to the one of the second charging current values from the charging comparison table according to the current voltage value, and after the interruption period ends, the second charging current value is sequentially passed through the charging port and the transmission port. Transmitting to the rechargeable battery, and continuing the charging period and continuing the interruption period, and then repeating the detection voltage value, adjusting and outputting the corresponding charging current value for the charging period, and interrupting the transmission corresponding to the charging current value During the interruption period, etc., until the voltage of the rechargeable battery is detected to be saturated, so that there are multiple interruption periods during the fast charging process of the power supply device. , The rechargeable battery can effectively avoid overheat during the charging, but also according to the voltage of the rechargeable battery current, appropriate adjustment of the charging current.

For your convenience, the review committee can make a further understanding and understanding of the purpose, technical features and effects of the present invention. The embodiments are combined with the drawings, and the details are as follows:

[study]

1‧‧‧Mobile terminal device

11‧‧‧Rechargeable battery

13‧‧‧General charging circuit

130‧‧‧Battery charging chip

15‧‧‧Transportation

19‧‧‧Power supply

〔this invention〕

2‧‧‧Mobile terminal devices

21‧‧‧Transportation

211‧‧‧Power pin

22‧‧‧Rechargeable battery

23‧‧‧General charging circuit

24‧‧‧ fast charging circuit

25‧‧‧ fast charge switching chip

3‧‧‧Power supply unit

31‧‧‧Charging equipment

311‧‧‧Power supply pin

32‧‧‧Control unit

33‧‧‧ memory unit

331‧‧‧Charging table

34‧‧‧Power unit

401~408‧‧‧Steps

1 is a schematic structural view of a charging circuit of a conventional mobile device and a power supply device; FIG. 2 is a schematic structural view of a charging circuit of the mobile device and the power supply device of the present invention; and FIG. 3 is a flow chart of the present invention.

The present invention relates to a charging method for detecting a battery voltage during charging and adjusting a supply current according to the same. Referring to FIG. 2, the charging method is applied to a mobile terminal device 2 And a power supply device 3, in addition, the mobile terminal device 2 can be a smart phone, a tablet, etc., the power supply device 3 can be a mobile power source, a charging adapter (Adapter), etc., in an implementation For example, the mobile terminal device 2 includes a transmission port 21, a rechargeable battery 22, a general charging circuit 23, a fast charging circuit 24, and a fast charge switching chip 25. The transmission port 21 can be USB, Micro USB, Various types of connectors, such as Lightning, and can be electrically connected to one of the charging devices 31 to receive voltage, current and signals from the power supply device 3, but other in the present invention In the embodiment, the transmission port 21 and the charging port 31 can be directly connected to each other or connected through a transmission line.

In addition, as shown in FIG. 2, the general charging circuit 23 is electrically connected to the rechargeable battery 22, and can generally charge the rechargeable battery 22 in a normal charging mode, wherein the general charging circuit 23 includes A battery charging chip, and the circuit structure thereof can be as shown in the general charging circuit 13 of FIG. 1, that is, the battery charging chip can measure the charging current and voltage of the rechargeable battery 22, and adopt a general charging method, for example, A current (Constant Current, CC)/Constant Voltage (CV) method transmits the received current to the rechargeable battery 22; further, as shown in FIG. 2, the fast charging circuit 24 Is electrically connected to the rechargeable battery 22, and can quickly charge the rechargeable battery 22 in a fast charging mode, the charging speed of the fast charging is greater than the charging speed of the general charging, and particularly, the foregoing In the embodiment, the present invention is not limited to the circuit structure of the fast charging circuit 24 and the general charging circuit 23. As long as the foregoing technical features are met, the charging speed of the fast charging is made. Generally greater than the charging speed by the charge, that is, the present invention is the fast charge circuit 24 and the charging circuit 23 typically, combined to Chen.

Referring to FIG. 2, the fast charge switching chip 25 and the transfer port respectively 21, the fast charging circuit 24 and the general charging circuit 23 are electrically connected to receive the current from the transmission port 21, wherein the fast charge switching chip 25 has a fast charging state and a general charging state, when it is switched to fast When the state of charge (i.e., 25A and 25B of FIG. 2 are electrically connected, but 25A and 25C are disconnected), the fast charge switching chip 25 transmits the current transmitted from the port 21 to the fast charging circuit 24, The rechargeable battery 22 is quickly charged through the fast charging circuit 24, and the voltage value on the power pin 211 of the transmission port 21 is equal to the voltage value of the rechargeable battery 22; 25 is switched to the normal state of charge (ie, 25A and 25C of FIG. 2 are electrically connected, but 25A and 25B are disconnected), and the current transmitted from the port 21 is transmitted to the general charging circuit 23 to The rechargeable battery 22 is normally charged by the general charging circuit 23.

In addition, as shown in FIG. 2, the power supply device 3 includes the charging port 31, a control unit 32, a memory unit 33, and a power unit 34, wherein the charging port 31 has at least one power supply pin. 311, and in a state in which the charging port 31 is electrically connected to the port 21, the voltage value of the power pin 311 is equal to the voltage value of the power pin 211, and the control unit 32 and the charging unit respectively 31. The memory unit 33 and the power unit 34 are electrically connected to access the data in the memory unit 33, and control the power unit 34 to output a current to the charging port 31, and receive the data from the charging port 31. The data, however, is specifically mentioned herein. In FIG. 2, although the electrical unit 34 and the charging port 31 are electrically connected, in other embodiments of the present invention, the data is electrically connected. The unit 34 may not be electrically connected to the charging port 31, but may transmit current through the control unit 32. Therefore, in the scope of the subsequent embodiments or the patent application of the present invention, the "control unit 32 transmits current value" is claimed. Scope should include "control The control unit 32 of the power unit 34 is directly transmitting current to the charging port 31 "and" the control unit 34 receives power transmission unit 32 The current is sent, and it is transferred to the charging 埠31" and other implementations.

Referring to FIG. 2, the memory unit 33 stores a charging comparison table 331. The charging comparison table 331 includes a plurality of voltage values and corresponding charging current values, and the power unit 34 can supply a charging current to the charging unit. The charging port 31, when the power supply device 3 is to perform a "fast charging technology" on the mobile terminal device 2, the fast charging switching chip 25 is switched to the fast charging mode so that the power supply device 3 can pass through the fast charging circuit 24, The rechargeable battery 22 is charged. Further, in the foregoing case, the control unit 32 transmits a first charging current value (eg, 2.1 amps) to the rechargeable battery 22, and during a continuous charging period (eg, 100 milliseconds). After (ms)), the control unit 32 interrupts the transmission of the first current value for an interruption period (eg, 100 milliseconds (ms)). At this time, the control unit 32 detects during the interruption period. The current voltage value of the power supply pin 311 of the charging port 31 can further know the current voltage value of the rechargeable battery 22, and the control unit 32 reads from the charging comparison table 331 according to the current voltage value. Corresponding to one of the second charging current values And after the end of the interruption period, the second charging current value (eg, 2 amps) is transmitted to the rechargeable battery 22, and continues for the charging period (eg, 100 milliseconds (ms)), after which the control unit 32 The second current value is again interrupted and continues for the interruption period (eg, 100 milliseconds (ms)), and during the interruption period, the current voltage value of the power supply pin 311 is detected, and the power is adjusted accordingly. The charging current output by the unit 34 until the voltage of the rechargeable battery 22 is saturated; here, when the rechargeable battery 22 no longer receives the current, the voltage value thereof changes to its own voltage value, therefore, the The control unit 32 can determine whether the voltage of the rechargeable battery 22 is saturated or close to saturation according to the current voltage value of the power supply pin 311, so as to adjust the charging current. Continuous transmission of large currents causes damage to the rechargeable battery 22.

In order to clearly disclose the charging method of the present invention, the following is only the control of the present invention. For the description of the processing flow of the unit 32, please refer to FIGS. 2 and 3: (401) the control unit 32 transmits a charging current value to the rechargeable battery 22, and proceeds to step (402); (402) the control unit 32: determining whether the charging current value reaches a charging period, if yes, proceeding to step (403), otherwise, returning to step (402); (403) the control unit 32 interrupts transmitting the charging current value, and proceeds to step (404); The control unit 32 detects a current voltage value of the power supply pin 311 of the charging port 31, proceeds to step (405); (405) the control unit 32 reads the charging comparison table 331, proceeds to step (406); (406) The control unit 32 obtains the corresponding charging current value from the charging comparison table 331 according to the current voltage value, and proceeds to step (407); (407) the control unit 32 determines whether the power supply has been stopped for an interruption period, and if so, enters Step (408), otherwise, returning to step (407); (408) the control unit 32 transmits the corresponding charging current value to the rechargeable battery 22, and proceeds to step (402).

Thus, referring to FIG. 2, by the overall charging method of the present invention, the following effects can be achieved: (A) since the power supply device 3 and the mobile terminal device 2 are in the process of performing fast charging, there may be multiple During the interruption, therefore, the temperature of the rechargeable battery 22 during the charging process can be effectively controlled, and at the same time, when the electrolyte in the rechargeable battery 22 is subjected to an electrochemical reaction, the rechargeable battery 22 can be rested during the interruption period to In the internal electrolyte, a portion having a high concentration can flow to a portion having a low concentration, thereby allowing the internal electrolyte concentration of the rechargeable battery 22 to be uniform, so that the charging efficiency of the rechargeable battery 22 can be improved; (B) The power supply device 3 can adjust a suitable charging current according to the current voltage of the rechargeable battery 22, that is, when the rechargeable battery 22 approaches a saturation voltage, the power supply device 3 provides a smaller current to the The mobile terminal device 2; conversely, when the rechargeable battery 22 is not adjacent to the saturation voltage, the power supply device 3 provides a large current to the mobile terminal device 2; thus, not only can the charging time be effectively shortened, but also the charging can be avoided. The battery 22; and (C) the process of detecting and adjusting the current of the present invention is performed by the control unit 32 of the power supply device 3, thereby effectively reducing the operational load of the mobile terminal device 2, and at the same time, the mobile terminal device 2 The heat generated by the mobile terminal device 2 can be reduced without running the foregoing process.

The above is only the preferred embodiment of the present invention, but the scope of the claims of the present invention is not limited thereto, and according to those skilled in the art, according to the technical content disclosed in the present invention, Equivalent changes that are easily considered are within the scope of protection of the invention.

401~408‧‧‧Steps

Claims (4)

A charging method for detecting a battery voltage during charging and adjusting a supply current according to the method is applied to a mobile terminal device and a power supply device, wherein the power supply device is provided with a charging port, and a charging reference table is built therein, The charging comparison table includes a plurality of voltage values and a corresponding charging current value. The mobile terminal device has a fast charging mode and a general charging mode, and is provided with a transmission port and a rechargeable battery, and the transmission tether is electrically connected to the charging port. Connecting to receive the current from the charging device, when the mobile terminal device is in the fast charging mode, the charging battery is quickly charged, and when the mobile terminal device is in the normal charging mode, The charging battery is generally charged, and the charging speed of the fast charging is greater than the charging speed of the general charging, the power supply device is electrically connected to the mobile terminal device, and the mobile terminal device is in the state of the fast charging mode. Next, the power supply device performs the following steps: sequentially charging a first charging current value through the charging And transmitting the battery to the rechargeable battery, and after continuing for a charging period, interrupting transmitting the first charging current value for an interruption period; during the interruption, detecting one of the charging pins a current voltage value, wherein the power supply pin is electrically connected to a power pin of the transmission port, and a voltage value of the power supply pin is equal to a voltage value of the power pin, and a voltage value of the power pin And corresponding to the voltage value of the rechargeable battery; according to the current voltage value, reading a corresponding second charging current value from the charging comparison table; after the interruption period ends, the second charging current value is sequentially passed through the Charging port and the transmission port, transmitting to the rechargeable battery, and sequentially continuing the charging period and continuing the interruption period; and Repeating the steps of detecting the voltage value, adjusting and outputting the corresponding charging current value to the charging period, interrupting the corresponding charging current value to the interruption period, and the like until the voltage of the rechargeable battery is detected to be saturated. The mobile terminal device further includes a fast charging circuit, a general charging circuit, and a fast charge switching chip, wherein the general charging circuit and the fast charging circuit are electrically connected to the rechargeable battery, respectively. The fast charge switching chip is electrically connected to the transmission port and the fast charging circuit or the general charging circuit, respectively, and the fast charging switching chip switches and transmits the mobile terminal device in the fast charging mode. A fast charging circuit that quickly charges the rechargeable battery. According to the charging method of claim 2, in the state in which the mobile terminal device is in the fast charging mode, the fast charge switching chip switches and transmits the charging battery through the general charging circuit. The charging device of claim 1, 2 or 3, the power supply device further includes a control unit, a memory unit and a power unit, wherein the control unit and the charging unit, the memory unit and the power The unit phase is electrically connected, and the charging unit stores the charging comparison table, and the control unit enables the power unit to directly supply the first charging current value or the corresponding charging current value to the charging port, or indirectly through the charging unit. The first charging current value or the corresponding charging current value should be given to the charging port.