CN104167801A - A method for displaying the status of mobile power supply, mobile terminal and mobile power supply - Google Patents

Abstract

The invention is suitable for the field of mobile equipment, and provides a method for displaying the state of a mobile power supply, a mobile terminal and the mobile power supply, wherein the method comprises the following steps: the mobile terminal is connected with the mobile power supply through a USB (universal serial bus) line; the mobile terminal sends a command for acquiring the state information to the mobile power supply through the D +/D-of the USB line; the mobile power supply acquires the state information of the mobile power supply according to the instruction, and sends the state information to the mobile terminal through the D +/D-of the USB cable; the mobile terminal stores the state information into a preset node; the mobile terminal reads the state information from the node; and the mobile terminal displays the state information. According to the invention, a user can know the specific state information of the mobile power supply, such as the current electric quantity or the current temperature of the mobile power supply, and the user can judge whether the mobile power supply needs to be charged in advance or used when the temperature of the mobile power supply is reduced to be not too hot according to the specific state information.

Description

A method for displaying the status of mobile power supply, mobile terminal and mobile power supply

technical field

The invention belongs to the field of mobile equipment, and in particular relates to a method for displaying the status of a mobile power supply, a mobile terminal and a mobile power supply.

Background technique

As the functions of smart terminals become more and more powerful, power consumption has gradually become a difficult problem for users. One or two charges a day are common. In order to prevent the smart terminal from suddenly running out of power, most users equip the smart terminal with a mobile power supply.

Due to the cost and portability of the mobile power supply, there is no LCD, and the user can only know the status of the mobile power supply through the indicator light. But what the indicator light represents is a very broad thing. For example, when the power is 20% and the power is 80%, the indication of the light may be the same. Some mobile power supplies are equipped with several indicator lights, which roughly show the current power of the mobile power supply, but it is difficult for users to understand the meaning of each indicator light, so they cannot clearly know how much power is left in the mobile power supply, whether to charge it in advance, so that After going out with a mobile power supply, sometimes after using it for a while, it is very frustrating to find that the mobile power supply is out of power.

In addition, when the mobile power supply heats up, the user does not know the specific temperature, whether it needs to be "cooled".

Contents of the invention

Embodiments of the present invention provide a method for displaying the state of a mobile power supply, a mobile terminal, and a mobile power supply, aiming to solve the problem in the prior art that users cannot clearly know the state of the mobile power supply during use of the mobile power supply, for example, mobile The current power level of the power supply or the current temperature problem.

In one aspect, a method for displaying a state of a mobile power supply is provided, the method comprising:

The mobile terminal is connected to the mobile power supply through a USB cable;

The mobile terminal sends an instruction to obtain status information to the mobile power supply through the D+/D- of the USB cable;

The mobile power supply obtains the state information of the mobile power supply according to the instruction, and sends the state information to the mobile terminal through the D+/D- of the USB line;

The mobile terminal stores the state information in a preset node;

The mobile terminal reads the status information from the node;

The mobile terminal displays the status information.

Further, the state information includes any one of the current battery capacity, current temperature, current voltage, and current current of the mobile power supply.

Further, under the preset directory of the mobile terminal, the mobile terminal creates a corresponding node for each type of state information, and different types of state information are stored in different nodes.

In another aspect, a mobile terminal is provided, and the mobile terminal includes:

The connection establishment unit is used to establish a connection with the mobile power supply through a USB cable;

The command sending unit is used to send the command to obtain the status information to the mobile power supply through the D+/D- of the USB line;

The state information receiving unit is used to receive the state information sent by the mobile power supply through the D+/D- of the USB line;

a state information storage unit, configured to store the state information in a preset node;

a state information reading unit, configured to read the state information from the node;

The status information display unit is used to display the status information.

Further, the state information includes any one of the current battery capacity, current temperature, current voltage, and current current of the mobile power supply.

Further, the mobile terminal also includes:

The node creation unit is used to create a corresponding node for each type of state information in the preset directory of the mobile terminal, and store different types of state information in different nodes.

In yet another aspect, a mobile power supply is provided, the mobile power supply comprising:

A connection establishment unit, configured to establish a connection with the mobile terminal via a USB cable;

The instruction receiving unit is used to receive the instruction for acquiring state information sent by the mobile terminal through the D+/D- of the USB line;

A status information acquisition unit, configured to acquire status information of the mobile power supply according to the instruction;

The state information sending unit is used to send the state information to the mobile terminal through the D+/D- of the USB line.

Further, the state information includes any one of the current battery capacity, current temperature, current voltage, and current current of the mobile power supply.

Further, the state information acquisition unit includes:

The ADC sampling module is used to obtain the current temperature, current voltage, and current current of the mobile power supply through ADC sampling;

The open circuit voltage calculation module is used to calculate the open circuit voltage according to the current voltage and the current current;

The power calculation module is used to search the relationship table between temperature, power and open circuit voltage according to the open circuit voltage and the current temperature to obtain the current power of the mobile power supply.

In the embodiment of the present invention, after the mobile power supply receives the instruction to obtain status information sent by the mobile terminal, it can send the obtained corresponding status information to the mobile terminal, and display it to the user on the mobile terminal, so that the user can know the specific status information of the mobile power supply. Status information, such as the current power level or current temperature of the mobile power supply, the user can judge whether to charge the mobile power bank in advance or use it when the temperature of the mobile power bank is not too hot according to these specific status information.

Description of drawings

Fig. 1 is an implementation flow chart of a method for displaying the state of a mobile power supply provided by Embodiment 1 of the present invention;

Fig. 2 is a schematic diagram of the relationship table of temperature-electricity-open-circuit voltage OCV voltage provided by Embodiment 1 of the present invention;

FIG. 3 is a structural block diagram of a mobile terminal provided in Embodiment 2 of the present invention;

Fig. 4 is a structural block diagram of a mobile power supply provided by Embodiment 3 of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In the embodiment of the present invention, the mobile terminal is connected to the mobile power supply through a USB cable, and the mobile terminal sends an instruction to obtain status information to the mobile power supply through the D+/D- of the USB cable, and the mobile power supply obtains the status information of the mobile power supply according to the instruction , and send the state information to the mobile terminal, the mobile terminal first stores the state information in a preset node, then reads the state information from the node, and finally displays the state information.

The realization of the present invention is described in detail below in conjunction with specific embodiment:

Embodiment one

Figure 1 shows the implementation process of the method for displaying the state of the mobile power supply provided by Embodiment 1 of the present invention, which is described in detail as follows:

In step S101, the mobile terminal is connected to the mobile power supply through a USB cable.

In the embodiment of the present invention, the smart terminal displaying the status information of the mobile power supply is a mobile terminal.

The mobile power supply charges the mobile terminal through the USB line. There are 4 signals on the USB line, vbus provides current, gnd is grounded, and D+/D- are idle.

In step S102, the mobile terminal sends an instruction to obtain status information to the mobile power supply through D+/D- of the USB cable.

In the embodiment of the present invention, after the connection between the mobile terminal and the mobile power supply is established through the USB cable, the two can communicate through the idle D+/D- of the USB cable.

Wherein, the mobile terminal can D+/D- send an instruction to obtain status information to the mobile power supply, and the obtained status information can be any one of the current power, current temperature, current voltage, and current current of the mobile power supply.

Specifically, the instruction for acquiring status information is a pre-designed instruction, and each type of status information corresponds to a different instruction.

Wherein, the instruction for obtaining the current power information of the mobile power supply may be defined as 0x51, and the instruction for obtaining the current temperature information of the mobile power supply may be defined as 0x52. The defined instructions are sent to the mobile power supply in binary form through the D+/D- of the USB cable. What kind of instruction is specifically defined can be defined according to the agreement between the mobile power supply and the mobile terminal, and there is no limitation here.

Wherein, an application "obtaining the status of mobile power supply.apk" is installed on the mobile terminal. The apk interface includes options or buttons such as "get the power information of the mobile power supply" and "get the temperature information of the starting power supply". By selecting or clicking the corresponding options or buttons on the apk interface, the mobile terminal will automatically generate the corresponding command and send it This instruction goes to the mobile power supply. For example, if the user selects "obtain the power information of the mobile power supply", the mobile terminal generates and sends 0x51 to the power bank, requesting to obtain the power information of the mobile power supply.

In step S103, the mobile power source acquires state information of the mobile power source according to the instruction, and sends the state information to the mobile terminal through D+/D− of the USB cable.

In the embodiment of the present invention, after the mobile power supply receives the instruction sent by the mobile terminal through the D+/D- of the USB line, it acquires the corresponding state according to the instruction. For example, if the received command is 0x51, then obtain the current power of the mobile power supply, and send the obtained current power to the mobile terminal through D+/D- of the USB cable.

Wherein, after receiving 0x51, the mobile power supply returns the power information to the mobile terminal in binary form through the D+/D- of the USB cable. For example, if the obtained current power is 60%, then return 00111100 to the mobile terminal. Since the power range is 0 to 100, the length of the returned data is only 8 bits.

In step S104, the mobile terminal stores the status information in a preset node.

In the embodiment of the present invention, after receiving the power information sent by the mobile power supply through D+/D- of the USB cable, the mobile terminal stores the power information into the preset node /sys/class/power_supply/battery/power_bank_cap.

Wherein, an application "obtaining the status of mobile power supply.apk" is installed on the mobile terminal. Through this apk, several nodes can be created under the default directory /sys/class/power_supply/battery/ of the mobile terminal, and a corresponding node can be created for each type of status information, and different types of status information can be stored in different nodes middle. For example, create two nodes under the default directory /sys/class/power_supply/battery/: power_bank_cap and power_bank_temp. Among them, the power_bank_cap node is used to store the received power information, and power_bank_temp is used to store the received temperature information.

If the received status information is power information, the mobile terminal will store the received power information in the /sys/class/power_supply/battery/power_bank_cap node; if the received status information is temperature information, the mobile terminal will receive The temperature information is stored in the /sys/class/power_supply/battery/power_bank_temp node

In step S105, the mobile terminal reads the state information from the node.

In the embodiment of the present invention, since the Android system adopted by the mobile terminal is divided into the bottom layer and the upper layer, the mobile power supply can only communicate with the bottom layer, so the bottom layer stores the received status information into the corresponding node for the upper layer to obtain, and the bottom layer receives the status information After receiving the information, inform the upper layer that the status information sent by the mobile power supply has been received, the upper layer reads the data stored in the corresponding node, and displays the read data on the interface.

In step S106, the mobile terminal displays the status information.

In the embodiment of the present invention, the mobile terminal displays the read status information on the interface of the mobile terminal for the user to view.

In addition, it should be noted that which state information needs to be obtained is selected according to the needs of the user. If as mentioned above, the obtained state information is power information, the user can also choose to let the mobile power supply send temperature information or voltage information or power supply information to the mobile terminal.

Among them, after the mobile terminal obtains the power information, it can send 0x52 to the mobile power supply through the D+/D- of the USB line, and ask the mobile power supply to inform its temperature. After the mobile power supply receives 0x52 through the D+/D- of the USB line, the current The temperature is sent to the mobile terminal in binary form through the D+/D- of the USB cable. Since the temperature range is -40 to 100 degrees, which is a wide range, 8bit is not enough, and it can be sent multiple times continuously, one byte at a time. After receiving the temperature information, the mobile terminal parses several bytes together and displays it on the interface. Other information of the mobile power supply, such as voltage and current, can also be displayed to the user through steps 102 to 106 .

In addition, it should be noted that the current temperature, current voltage, and current current of the mobile power supply can be obtained through ADC sampling; after the open circuit voltage is calculated according to the current voltage and current current, the temperature, power and The relationship table between the open circuit voltage obtains the current power of the mobile power supply.

Specifically, the voltage, current, and temperature obtained through ADC sampling may be recorded as Vbat, Ibat, and Temp, respectively. The battery of the mobile power supply will get a temperature-power-open circuit voltage OCV voltage relationship table after hardware testing, as shown in Figure 2. In this table, the horizontal axis represents the voltage value under each power level, and the vertical axis represents different temperatures. For example, when the battery is 90% charged at 25 degrees Celsius, the battery OCV voltage is 4082mV. The internal resistance of the battery cell of the mobile power supply and the impedance from the battery contact to the ADC sampling point are known, denoted as R. Calculate OCV by voltage and current:

OCV＝Vbat+Ibat*R

When OCV and temperature are known, query the relationship table shown in Figure 2 to get the power.

In addition, it should be noted that the mobile power supply can also actively send status information to the mobile terminal. However, before the mobile power supply actively sends status information, it must first send an instruction to the mobile terminal, through which the mobile terminal is notified which status information the next received status information is, for example, power information or temperature information. The mobile terminal stores the received state information in the corresponding node according to the instruction, and then reads and displays it to the user. The specific execution process is similar to step S102 to step S106, and will not be repeated here.

In this embodiment, the mobile terminal and the mobile power supply communicate through the D+/D- of the USB cable, and the mobile terminal sends an instruction to obtain state information to the mobile power supply through D+/D-, and the mobile power supply obtains the corresponding state information according to the instruction and The status information is sent to the mobile terminal, and the mobile terminal side stores, reads and displays the status information to the user after receiving the status information. The user can obtain the corresponding status information of the mobile power supply according to his needs, which greatly improves the user experience. Moreover, there is no need for an adapter or any additional device between the mobile terminal and the mobile power supply. After the mobile power supply is plugged into the USB interface of the mobile terminal through a USB cable, the two can create status information, which saves costs. , increasing user convenience. In addition, the D+/D- of the USB cable is essentially a GPIO port, and the GPIO port can output high and low levels at will. Therefore, the communication format and protocol between the mobile terminal and the mobile power supply can be customized according to the needs of the R&D personnel, speeding up R&D speed, saving R&D costs.

Those of ordinary skill in the art can understand that all or part of the steps in the methods of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the corresponding program can be stored in a computer-readable storage medium. Media, such as ROM/RAM, magnetic disk or optical disk, etc.

Embodiment two

FIG. 3 shows a specific structural block diagram of a mobile terminal provided by Embodiment 2 of the present invention. For convenience of description, only parts related to the embodiment of the present invention are shown. The mobile terminal 3 includes: a connection establishment unit 31 , an instruction sending unit 32 , a status information receiving unit 33 , a status information storage unit 34 , a status information reading unit 35 and a status information display unit 36 .

Wherein, the connection establishment unit 31 is used to establish a connection with the mobile power supply through a USB cable;

The instruction sending unit 32 is used to send an instruction to obtain status information to the mobile power supply through the D+/D- of the USB line;

The state information receiving unit 33 is used to receive the state information sent by the mobile power supply through the D+/D- of the USB line;

A state information storage unit 34, configured to store the state information into a preset node;

A state information reading unit 35, configured to read the state information from the node;

The state information display unit 36 is configured to display the state information.

Specifically, the state information includes any one of the current battery capacity, current temperature, current voltage, and current current of the mobile power supply.

Further, the mobile terminal 3 also includes:

The node creation unit is used to create a corresponding node for each type of state information in the preset directory of the mobile terminal, and store different types of state information in different nodes.

The mobile terminal provided by the embodiment of the present invention can be applied in the foregoing first corresponding method embodiment. For details, refer to the description of the foregoing first embodiment, which will not be repeated here.

Embodiment three

FIG. 4 shows a specific structural block diagram of the mobile power supply provided by Embodiment 2 of the present invention. For convenience of description, only the parts related to the embodiment of the present invention are shown. The mobile power supply 4 includes: a connection establishing unit 41 , an instruction receiving unit 42 , a status information acquiring unit 43 and a status information sending unit 44 .

Wherein, the connection establishment unit 41 is used to establish a connection with the mobile terminal through a USB cable;

The instruction receiving unit 42 is used to receive the instruction for acquiring state information sent by the mobile terminal through the D+/D- of the USB line;

A status information acquisition unit 43, configured to acquire status information of the mobile power supply according to the instruction;

The state information sending unit 44 is configured to send the state information to the mobile terminal through D+/D- of the USB line.

Specifically, the state information includes any one of the current battery capacity, current temperature, current voltage, and current current of the mobile power supply.

Specifically, the state information acquisition unit 43 includes:

The ADC sampling module is used to obtain the current temperature, current voltage, and current current of the mobile power supply through ADC sampling;

The open circuit voltage calculation module is used to calculate the open circuit voltage according to the current voltage and the current current;

The power calculation module is used to search the relationship table between temperature, power and open circuit voltage according to the open circuit voltage and the current temperature to obtain the current power of the mobile power supply.

The mobile power supply provided by the embodiment of the present invention can be applied in the aforementioned first corresponding method embodiment. For details, refer to the description of the aforementioned first embodiment, which will not be repeated here.

It is worth noting that in the above system embodiments, the units included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, the specific names of each functional unit It is only for the convenience of distinguishing each other, and is not used to limit the protection scope of the present invention.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (9)

1. A method for displaying the state of a mobile power supply, characterized in that the method comprises: The mobile terminal is connected to the mobile power supply through a USB cable; The mobile terminal sends an instruction to obtain status information to the mobile power supply through the D+/D- of the USB cable; The mobile power supply obtains the state information of the mobile power supply according to the instruction, and sends the state information to the mobile terminal through the D+/D- of the USB line; The mobile terminal stores the state information in a preset node; The mobile terminal reads the status information from the node; The mobile terminal displays the status information. 2 . The method according to claim 1 , wherein the status information includes any one of the current battery capacity, current temperature, current voltage, and current current of the mobile power supply. 3. The method according to claim 2, wherein, under the preset directory of the mobile terminal, the mobile terminal creates a corresponding node for each type of status information, and different types of status information are stored in different nodes middle. 4. A mobile terminal, characterized in that the mobile terminal comprises: The connection establishment unit is used to establish a connection with the mobile power supply through a USB cable; The command sending unit is used to send the command to obtain the status information to the mobile power supply through the D+/D- of the USB cable; The state information receiving unit is used to receive the state information sent by the mobile power supply through the D+/D- of the USB line; a state information storage unit, configured to store the state information in a preset node; a state information reading unit, configured to read the state information from the node; The status information display unit is used to display the status information. 5 . The mobile terminal according to claim 4 , wherein the status information includes any one of the current power, current temperature, current voltage and current current of the mobile power supply. 6. The mobile terminal according to claim 5, further comprising: The node creation unit is used to create a corresponding node for each type of state information in the preset directory of the mobile terminal, and store different types of state information in different nodes. 7. A mobile power supply, characterized in that the mobile power supply comprises: A connection establishment unit, configured to establish a connection with the mobile terminal via a USB cable; The instruction receiving unit is used to receive the instruction for acquiring state information sent by the mobile terminal through the D+/D- of the USB line; A status information acquisition unit, configured to acquire status information of the mobile power supply according to the instruction; The state information sending unit is used to send the state information to the mobile terminal through the D+/D- of the USB line. 8 . The mobile power supply according to claim 7 , wherein the status information includes any one of the current power, current temperature, current voltage and current current of the mobile power supply. 9. The mobile power supply according to claim 8, wherein the state information acquisition unit comprises: The ADC sampling module is used to obtain the current temperature, current voltage, and current current of the mobile power supply through ADC sampling; The open circuit voltage calculation module is used to calculate the open circuit voltage according to the current voltage and the current current; The power calculation module is used to search the relationship table between temperature, power and open circuit voltage according to the open circuit voltage and the current temperature to obtain the current power of the mobile power supply.