CN113852176A

CN113852176A - Charging device, electronic equipment, charging control method and mobile phone shell

Info

Publication number: CN113852176A
Application number: CN202111060626.8A
Authority: CN
Inventors: 贾勇
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2021-12-28

Abstract

The embodiment of the application relates to a charging device, electronic equipment, a charging control method and a mobile phone shell, wherein the charging device comprises: the power generation piece module comprises a first end and a second end, and is used for generating an initial charging signal according to the temperature difference between the first end and the second end; the temperature detection module is used for detecting the temperature of the first end of the power generation piece module and outputting a corresponding first temperature signal, and detecting the temperature of the second end of the power generation piece module and outputting a corresponding second temperature signal; and the power management module is respectively connected with the power generation sheet module and the temperature detection module and is used for determining corresponding target charging current according to the first temperature signal and the second temperature signal and adjusting the current of the initial charging signal to the target charging current so as to charge a battery of the electronic equipment.

Description

Charging device, electronic equipment, charging control method and mobile phone shell

Technical Field

The embodiment of the application relates to the technical field of charging, in particular to a charging device, electronic equipment, a charging control method and a mobile phone shell.

Background

With the continuous development of electronic and communication technologies, electronic devices such as mobile phones become indispensable tools in people's daily life. However, at present, the battery capacity of many electronic devices is small, and especially in the use scenes such as outdoors where charging is inconvenient, the electric quantity of the electronic devices often cannot support the use requirements of people. In the correlation technique, some manufacturers can set up structures such as power generation piece and charge to the battery, but, the power generation piece produces the unstable problem that charges even can't charge easily, has influenced user's use greatly and has experienced.

Disclosure of Invention

The embodiment of the application provides a charging device, electronic equipment, a charging control method and a mobile phone shell, which can optimize the stability of the charging device in charging a battery.

A charging device, comprising:

the power generation piece module comprises a first end and a second end, and is used for generating an initial charging signal according to the temperature difference between the first end and the second end;

the temperature detection module is used for detecting the temperature of the first end of the power generation piece module and outputting a corresponding first temperature signal, and detecting the temperature of the second end of the power generation piece module and outputting a corresponding second temperature signal;

and the power management module is respectively connected with the power generation sheet module and the temperature detection module and is used for determining corresponding target charging current according to the first temperature signal and the second temperature signal and adjusting the current of the initial charging signal to the target charging current so as to charge a battery of the electronic equipment.

An electronic device, comprising:

a battery;

a rear cover;

according to the charging device, the charging device is arranged between the battery and the rear cover, the first end of the power generation piece module in the charging device is a hot end, the hot end is arranged on one side close to the rear cover, the second end of the power generation piece module in the charging device is a cold end, and the cold end is arranged on one side close to the battery.

A charging control method for controlling a charging device in an electronic device, the charging device comprising a power generation sheet module, a temperature detection module, and a power management module, the power generation sheet module comprising a first end and a second end, the method comprising:

acquiring a voltage value of an initial charging signal generated by the power generation piece module according to the temperature difference between the first end and the second end;

when the voltage value is larger than a voltage threshold value, the power management module is controlled to receive the initial charging signal, a corresponding target charging current is determined according to a first temperature signal and a second temperature signal, the current of the initial charging signal is adjusted to the target charging current, and a battery of the electronic device is charged, wherein the first temperature signal corresponds to the temperature of the first end of the power generation piece module, and the second temperature signal corresponds to the temperature of the second end of the power generation piece module.

A handset housing, comprising:

a housing;

the charging device is arranged on the shell and used for charging a battery of the electronic equipment.

The charging device, the electronic device, the charging control method and the mobile phone shell comprise the following steps: the power generation piece module comprises a first end and a second end, and is used for generating an initial charging signal according to the temperature difference between the first end and the second end; the temperature detection module is used for detecting the temperature of the first end of the power generation piece module and outputting a corresponding first temperature signal, and detecting the temperature of the second end of the power generation piece module and outputting a corresponding second temperature signal; and the power management module is respectively connected with the power generation sheet module and the temperature detection module and is used for determining corresponding target charging current according to the first temperature signal and the second temperature signal and adjusting the current of the initial charging signal to the target charging current so as to charge a battery of the electronic equipment. In this application embodiment, through acquireing first temperature signal and second temperature signal, can monitor the running state of electricity generation piece module to confirm the current value of the initial signal of charging of electricity generation piece module current output, power management module can select appropriate target charging current according to the current value of initial signal of charging, avoids the electricity generation piece module can't drive the battery load and leads to the unstable stability of charging process, promptly, provides a charging device that charging stability is good.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or related technologies of the present application, the drawings needed to be used in the description of the embodiments or related technologies are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a block diagram of a charging device according to an embodiment;

fig. 2 is a second block diagram of the charging device according to an embodiment;

FIG. 3 is a partial block diagram of the temperature detection module and the current adjustment unit according to an embodiment;

FIG. 4 is a block diagram of a voltage converting unit according to an embodiment;

FIG. 5 is a circuit diagram of a voltage converting unit according to an embodiment;

FIG. 6 is an equivalent circuit diagram of the voltage converting unit in the first stage of the charging mode of the power generating strip according to an embodiment;

FIG. 7 is an equivalent circuit diagram of the voltage converting unit in the second stage of the charging mode of the power generating strip according to an embodiment;

FIG. 8 is a schematic view of an electronic device of an embodiment;

FIG. 9 is a schematic cross-sectional view of the electronic device of the embodiment of FIG. 8 at a power generation tile module in a direction perpendicular to the display surface;

FIG. 10 is a flowchart illustrating a charging control method according to an embodiment;

FIG. 11 is a second flowchart of a charging control method according to an embodiment;

FIG. 12 is a second circuit diagram of a voltage converting unit according to an embodiment;

FIG. 13 is an equivalent circuit diagram of the voltage converting unit in the direct charging mode according to an embodiment;

fig. 14 is an equivalent circuit diagram of the voltage converting unit in the first phase of the high-voltage fast-charging mode according to an embodiment;

FIG. 15 is an equivalent circuit diagram of the voltage converting unit in the second phase of the high-voltage fast-charging mode according to an embodiment;

FIG. 16 is a third flowchart of a charging control method according to an embodiment;

fig. 17 is a block diagram of a charging control apparatus according to an embodiment;

FIG. 18 is a diagram illustrating an internal structure of an electronic device according to an embodiment;

fig. 19 is a schematic structural diagram of a mobile phone case according to an embodiment.

Element number description:

an electronic device: 10; a charging device: 11; the power generation piece module: 100, respectively; a temperature detection module: 200 of a carrier; a power management module: 300, respectively; a voltage conversion unit: 310; a first energy storage element: 311; a second energy storage element: 312; a first switching element: 313; a second switching element: 314; a current adjusting unit: 320, a first step of mixing; a differential amplifier: 321; an analog-to-digital converter: 322, respectively; current regulator: 323; a battery: 12; a rear cover: 13; a heat conducting pad: 14; a protective shell: 20; a voltage acquisition module: 1702; a signal conditioning module: 1704.

Detailed Description

To facilitate an understanding of the embodiments of the present application, the embodiments of the present application will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. The embodiments of the present application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiments of this application belong. The terminology used herein in the description of the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the embodiments of the present application, it is to be understood that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on methods or positional relationships shown in the drawings, and are only used for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the embodiments of the present application.

It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first temperature signal may be referred to as a second temperature signal, and similarly, a second temperature signal may be referred to as a first temperature signal, without departing from the scope of the present application. The first temperature signal and the second temperature signal are both temperature signals, but are not the same temperature signal.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the description of the present application, "a number" means at least one, such as one, two, etc., unless specifically limited otherwise.

The embodiment of the application provides a charging device 11 for charging a battery of an electronic device. The electronic Device may be an electronic Device including a Mobile phone, a tablet computer, a notebook computer, a palm computer, a Mobile Internet Device (MID), a wearable Device (e.g., a smart watch, a smart bracelet, a pedometer, etc.), and the like. The charging device 11 of the present embodiment may be located inside the electronic device, and connected to the battery of the electronic device through an internal circuit trace. The charging device 11 may also be an external charging device, and is connected to the battery of the electronic device in a wired or wireless manner, so as to provide electric energy for the battery of the electronic device. The interface Type of the wired connection can be, but is not limited to, Micro, Type-C, and the like.

Fig. 1 is a block diagram of a charging device 11 according to an embodiment, and referring to fig. 1, in the embodiment, the charging device 11 includes a power generating chip module 100, a temperature detecting module 200, and a power management module 300.

The power generation sheet module 100 includes a first end and a second end, and the power generation sheet module 100 is configured to generate an initial charging signal according to a temperature difference between the first end and the second end. The power generation sheet module 100 may be a semiconductor power generation sheet, and the semiconductor power generation sheet includes two different semiconductors. When there is a difference in temperature applied to the two semiconductors, carriers move from the hot side (i.e., the higher temperature semiconductor) to the cold side (i.e., the lower temperature semiconductor) and accumulate at the cold side, thereby forming a potential difference inside the semiconductor power generation sheet. Meanwhile, under the action of the potential difference, a reverse charge flow is generated inside the semiconductor power generation sheet. When the thermal moving charge flow and the internal electric field reach dynamic balance, stable temperature difference electromotive force is formed between the cold end and the hot end of the semiconductor power generation sheet, namely, a stable initial charging signal is generated. Wherein, the first end that can be electricity generation piece module 100 is the hot junction, and the second end is the cold junction, or also can be electricity generation piece module 100's first end is the cold junction, and the second end is the hot junction, and this embodiment does not do the restriction.

Wherein, the hot end temperature can come from external heat sources such as human body. For example, there may be a case where a user covers the hot end of the charging device 11 with a hand, and a temperature difference is implemented by using a relatively low temperature inside the charging device 11 and a relatively high temperature of the hand, and electric energy is generated by using the temperature difference. Taking the temperature difference between the hot end and the cold end as an example of 8 ℃, the voltage of the initial charging signal generated by the power generation chip module 100 is about 0.5V, and the current is about 50-100mA, so that the battery of the electronic device can be charged, and the power consumption requirements of dialing a phone call, sending a short message and the like in an emergency state can be met. It will be appreciated that the greater the temperature difference between the hot and cold sides, the greater the loading capacity of the charging device, i.e. the faster the charging speed. Therefore, the hot water cup can be placed at the hot end of the charging device 11, the cold end of the charging device 11 is placed close to the ground, the temperature of the hot water is relatively high due to the low temperature of the ground, a temperature difference of more than 40 ℃ can be formed, a voltage output of 1.8V is formed, and the load can be carried by more than 300 mA.

The temperature detection module 200 is configured to detect a temperature of a first end of the power generation sheet module 100 and output a corresponding first temperature signal, and detect a temperature of a second end of the power generation sheet module 100 and output a corresponding second temperature signal. The temperature signal can be understood as a signal having a one-to-one mapping relationship with the temperature of the corresponding end. Further, the temperature signal may have a positive correlation with the temperature of the corresponding end, i.e., the higher the temperature of the corresponding end, the larger the amplitude of the temperature signal. The temperature signal may have a negative correlation with the temperature of the corresponding end, i.e., the higher the temperature of the corresponding end, the smaller the amplitude of the temperature signal. Alternatively, the temperature signal may be a voltage signal or a current signal. For example, the temperature detection module 200 may be an electronic component having a temperature sensing function, such as a thermistor, or may be a temperature sensor.

The power management module 300 is connected to the power generation sheet module 100 and the temperature detection module 200, and is configured to determine a corresponding target charging current according to the first temperature signal and the second temperature signal, and adjust a current of the initial charging signal to the target charging current to charge a battery of the electronic device. The power management module 300 may be configured with a mapping relationship between different temperature signal difference values and the target charging current in advance, and specifically, the mapping relationship may be determined jointly according to the type and size of the power generation sheet module 100, so as to realize accurate selection of the target charging current. It can be understood that, if the charging current is not dynamically adjusted flexibly according to the actual situation of the power generation sheet module 100, but the power management module 300 is controlled to keep outputting a fixed charging current, when the power actually generated by the power generation sheet module 100 is insufficient, the on-load capability of the charging device 11 will be insufficient, thereby affecting the stability of the charging process of the charging device 11.

In this embodiment, the operating state of the power generation sheet module 100 can be monitored by acquiring the first temperature signal and the second temperature signal, so as to determine the current value of the initial charging signal currently output by the power generation sheet module 100, and the power management module 300 can select an appropriate target charging current according to the current value of the initial charging signal, thereby avoiding the unstable stability of the charging process caused by the fact that the power generation sheet module 100 cannot drive a battery load, that is, providing the charging device 11 with good charging stability.

Fig. 2 is a second block diagram of the charging device 11 according to an embodiment, and referring to fig. 2, in this embodiment, the power management module 300 includes a voltage conversion unit 310 and a current regulation unit 320.

The voltage conversion unit 310 is connected to the power generation chip module 100, and configured to perform a voltage boosting process on the initial charging signal to generate a voltage conversion signal having a preset charging voltage. Specifically, in some charging devices 11, the voltage of the initial charging signal output by the power generation sheet module 100 is about 0.5V to 1.8V due to the type of the power generation sheet module 100 and other reasons, and the charging signal in the above voltage range cannot directly charge the battery. Therefore, the initial charging signal needs to be boosted to make the voltage of the charging signal meet the requirement, and for example, the voltage of the initial charging signal may be boosted to 5V and then transmitted to the current regulating unit 320. When the voltage of the initial charging signal is less than the lower limit operating voltage, the voltage converting unit 310 does not operate until the voltage of the initial charging signal is greater than or equal to the lower limit operating voltage, which may be 0.5V, for example.

The current adjusting unit 320 is connected to the voltage converting unit 310 and the temperature detecting module 200, and configured to determine a corresponding target charging current according to the first temperature signal and the second temperature signal, receive the voltage conversion signal, and adjust a current of the voltage conversion signal to the target charging current. It can be understood that, under the condition that the output power of the power generating chip module 100 is not changed, the current of the charging signal transmitted to the battery needs to be reduced to increase the voltage value of the initial charging signal to reach the preset charging voltage.

Therefore, in the present embodiment, the maximum output power that can be supported by the power generation chip module 100 may be determined according to the difference between the first temperature signal and the second temperature signal, and the corresponding target charging current may be determined according to the maximum output power and the preset voltage signal. The target charging current can be understood as the maximum charging current that the power generation sheet module 100 can support, so as to avoid the problem of exceeding the output power of the power generation sheet module 100, thereby improving the stability of the charging process.

With continued reference to fig. 2, in one embodiment, the current regulation unit 320 includes a differential amplifier 321, an analog-to-digital converter 322, and a current regulator 323.

The differential amplifier 321 is connected to the temperature detection module 200, specifically, the differential amplifier 321 has two input ends, the two input ends are respectively used for obtaining the first temperature signal and the second temperature signal in a one-to-one correspondence manner, and the differential amplifier 321 is used for generating a differential amplified signal according to a difference between the first temperature signal and the second temperature signal, and outputting the differential amplified signal to the analog-to-digital converter 322 through an output end of the differential amplifier 321. The analog-to-digital converter 322 is connected to the differential amplifying unit, and is configured to perform analog-to-digital conversion on the differential amplified signal to generate a current control signal corresponding to the temperature difference. The current regulator 323 is connected to the voltage conversion unit 310 and the analog-to-digital converter 322, respectively, for regulating the current of the voltage conversion signal to a target charging current corresponding to the current control signal.

In this embodiment, the analog-to-digital converter 322 can convert the difference between the first temperature signal and the second temperature signal more accurately by the amplifying function of the differential amplifier 321, so that the accuracy of the current adjustment by the current adjuster 323 can be improved. Moreover, through the processing procedure of analog-to-digital conversion, the control logic and control circuit when the current regulator 323 regulates the output current can be simplified, and the response speed of the current regulator 323 to the temperature change at the power generation piece module 100 is further improved.

Fig. 3 is a partial block diagram of the temperature detection module 200 and the current regulation unit 320 according to an embodiment, and fig. 3 does not show the structure of the analog-to-digital converter 322 and the current regulator 323 in the current regulation unit 320. Referring to fig. 3, in the present embodiment, the temperature detection module 200 includes a first thermistor disposed at a first end of the power generation chip module 100 and a second thermistor disposed at a second end of the power generation chip module 100, and a first end of the first thermistor and a first end of the second thermistor are respectively grounded. The current adjusting unit 320 further includes a first pull-up resistor and a second pull-up resistor. A first end of the first pull-up resistor is connected to a second end of the first thermistor and an input end of the differential amplifier 321, respectively, and a second end of the first pull-up resistor is connected to a power supply voltage end. The first end of the second pull-up resistor is connected to the second end of the second thermistor and an input end of the differential amplifier 321, respectively, and the second end of the second pull-up resistor is connected to the power supply voltage end.

In this embodiment, the resistance of the thermistor varies with the ambient temperature. The change may be a positive change, i.e. the higher the ambient temperature, the higher the resistance of the thermistor. For example, if the first thermistor has a resistance of 30k Ω at 25 ℃ and a resistance of 40k Ω at 30 ℃, the first pull-up resistor has a resistance of 30k Ω, and the voltage at the power supply voltage terminal is 5V, the first temperature signal at 25 ℃ is 2.5V and the first temperature signal at 30 ℃ is 2.86V. Similarly, the second temperature signal may also reflect the temperature of the environment in which the second thermistor is located. Therefore, the differential amplified signal output by the differential amplifier 321 can reflect the temperature difference of the power generation chip module 100, so as to determine the corresponding target charging current to achieve stable charging of the battery. It can be understood that the resistance of the thermistor may also change in a negative direction along with the change of the ambient temperature, that is, the higher the ambient temperature is, the smaller the resistance of the thermistor is, and the embodiment is not limited.

When the charging device 11 is an electronic device such as a mobile phone, the voltage at the power supply voltage end in fig. 3 may be derived from the voltage conversion signal or from an externally input voltage signal. Specifically, if the electronic device is in the on state during charging, the charging device 11 may obtain the voltage of the power supply voltage end from the system voltage of the electronic device such as the mobile phone. If the electronic device is in the power-on state during charging and the system voltage of the electronic device is zero, the charging device 11 may obtain the voltage of the power voltage end from the voltage conversion signal output by the voltage conversion unit 310, so as to ensure the normal operation of the temperature detection module 200.

Fig. 4 is a block diagram of a voltage converting unit 310 according to an embodiment, and referring to fig. 4, in this embodiment, the voltage converting unit 310 includes a first energy storage element 311, a second energy storage element 312, a first switching element 313, and a second switching element 314. A first end of the first energy storage element 311 is connected to the power generation sheet module 100 (not shown), a second end of the first energy storage element 311 is connected to a first end of the first switch element 313 and a first end of the second switch element 314 respectively, a second end of the first switch element 313 is grounded, a first end of the second energy storage element 312 is grounded, and a second end of the second energy storage element 312 is connected to a second end of the second switch element 314 respectively and serves as an output end of the voltage conversion unit 310. Wherein the voltage converting unit 310 is configured with a power strip charging mode comprising a first phase and a second phase, when the voltage converting unit 310 is in the first phase, the first switching element 313 is turned on and the second switching element 314 is turned off; when the voltage conversion unit 310 is in the second phase, the first switching element 313 is turned off and the second switching element 314 is turned on; the voltage converting unit 310 is configured to alternate between the first phase and the second phase under the control of a charging control instruction to generate the voltage converting signal.

Specifically, fig. 5 is a circuit diagram of the voltage converting unit 310 according to an embodiment, and referring to fig. 4 and 5 in combination, in the embodiment, the first energy storage element 311 is an inductor L1, the second energy storage element 312 is a first capacitor C1, the first switching element 313 is a first transistor Q1, and the second switching element 314 is a second transistor Q2. Referring to fig. 6, in the first stage of the power generation slice charging mode, the first transistor Q1 is turned on and the second transistor Q2 is turned off, so that the first terminal of the inductor L1 is turned on and the power INPUT terminal INPUT is turned on, the second terminal of the inductor L1 is grounded, and the signal INPUT by the power INPUT terminal INPUT charges the inductor L1. Fig. 7 is an equivalent circuit diagram of the voltage converting unit 310 of an embodiment in the second stage of the power generating slice charging mode, referring to fig. 7, in the second stage of the power generating slice charging mode, the first transistor Q1 is turned off and the second transistor Q2 is turned on, so that the first terminal of the inductor L1 is turned on with the power INPUT terminal INPUT, and the second terminal of the inductor L1 is turned on with the power OUTPUT terminal OUTPUT, at which time the inductor L1 discharges and superimposes with the signal INPUT by the power INPUT terminal INPUT to realize voltage boosting. In the charging mode of the power generating sheet, the signal INPUT by the INPUT end of the power supply is boosted by alternately executing the two stages so as to meet the charging voltage required by charging the battery.

Fig. 8 is a schematic diagram of an electronic device 10 according to an embodiment, and fig. 9 is a schematic cross-sectional view of the electronic device 10 according to the embodiment of fig. 8 along a direction perpendicular to a display surface at the power generating sheet module 100, and it should be noted that, due to the cross-sectional position, the temperature detection module 200 and the power management module 300 in the charging device are not shown in fig. 9. With reference to fig. 8 and 9, in this embodiment, the electronic device 10 includes a battery 12, a back cover 13, and a charging device as described above, where the charging device is disposed between the battery 12 and the back cover 13, a first end of the power generation sheet module 100 in the charging device is a hot end, the hot end is disposed on a side close to the back cover 13, a second end of the power generation sheet module 100 in the charging device is a cold end, and the cold end is disposed on a side close to the battery 12.

In this embodiment, based on the above structure, the rear cover 13 of the electronic device 10 is heated by an external heat source such as a human body, so that the hot end temperature of the power generation sheet module 100 can be increased, and the power generation sheet module 100 outputs a required initial charging signal, thereby implementing convenient charging of the electronic device 10 in an outdoor scene. It is understood that the internal structure of the charging device 11 can refer to the foregoing embodiments, and the detailed description is omitted here. Further, a thermal pad 14 may be disposed between the hot end and the rear cover 13, and/or a thermal pad 14 may be disposed between the cold end and the battery 12 to improve the temperature conductivity, and thus the output capacity of the power generating sheet module 100.

Fig. 10 is a flowchart of a charging control method according to an embodiment, where the charging control method according to the embodiment is applied to a processor in an electronic device such as a mobile phone, and is used to control a charging device according to the foregoing embodiments. The processor may be located outside the charging device 11, or may be integrated in the charging device 11, for example, the processor may be integrated in the power management module 300 in fig. 1, which is not limited in this embodiment. Referring to fig. 1 and 10 in combination, the control method of the present embodiment includes steps 1002 to 1004.

Step 1002, obtaining a voltage value of an initial charging signal generated by the power generation sheet module 100 according to a temperature difference between the first end and the second end.

Step 1004, when the voltage value is greater than the voltage threshold, controlling the power management module 300 to receive the initial charging signal, determine a corresponding target charging current according to a first temperature signal and a second temperature signal, and adjust the current of the initial charging signal to the target charging current to charge a battery of the electronic device, where the first temperature signal corresponds to the temperature of the first end of the power generation sheet module 100, and the second temperature signal corresponds to the temperature of the second end of the power generation sheet module 100.

In this embodiment, the operating state of the power generation sheet module 100 can be monitored by acquiring the first temperature signal and the second temperature signal, so that the current value of the initial charging signal currently output by the power generation sheet module 100 is determined, and then an appropriate target charging current can be selected according to the current value of the initial charging signal, thereby preventing the power generation sheet module 100 from driving a battery load to cause unstable stability of a charging process, that is, providing a charging control method with good charging stability.

Fig. 11 is a second flowchart of a charging control method according to an embodiment, and referring to fig. 1 and fig. 11 in combination, in the embodiment, the charging control method includes steps 1102 to 1106.

Step 1102, acquiring a connection state between a charging interface of the electronic device and an external charging device.

And 1104, when the charging interface is not connected with an external charging device, acquiring a voltage value of an initial charging signal generated by the power generation chip module 100 according to the temperature difference between the first end and the second end.

Step 1106, when the voltage value is greater than the voltage threshold, controlling the power management module 300 to receive the initial charging signal, determining a corresponding target charging current according to the first temperature signal and the second temperature signal, and adjusting the current of the initial charging signal to the target charging current to charge the battery of the electronic device.

Wherein, external charging equipment includes wired charging adapter and wireless charging adapter. It will be appreciated that the charging power of the adapter is typically greater than the power of the power generation tile module 100. Therefore, the speed of charging by connecting the charging interface to the external charging device may be greater than the speed of charging by the power generation sheet module 100, and the present embodiment may realize a more efficient charging process by detecting the connection state of the charging interface and the external charging device first.

With continued reference to fig. 11, in one embodiment, the charging control method further includes step 1108: when the charging interface is connected with an external charging device, the power management module 300 is controlled to receive an external charging signal from the charging interface to charge the battery of the electronic device.

Further, the processor can also detect whether the connection mode of the charging interface and the external charging equipment is wired connection or wireless connection. Specifically, the stability, power and other performances of wired charging are superior to those of wireless charging, whether the connection mode is wired connection or not can be detected firstly, and when the connection mode is wired connection, the wired charging protocol is identified so as to carry out wired charging through the corresponding protocol. When the connection mode is wireless connection, the wireless charging protocol is identified, so that wireless charging is carried out through the corresponding protocol.

Fig. 12 is a second circuit diagram of the voltage conversion unit according to an embodiment to support the charging mode of the power generating plate, and support a direct charging mode and a high-voltage fast charging mode in wired charging and wireless charging. Referring to fig. 12, the voltage conversion unit 310 includes an inductor L1, a first capacitor C1, a second capacitor C2, a first transistor Q1, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, a fifth transistor Q5, and a sixth transistor.

Specifically, a first terminal of the first transistor Q1 is connected to the second terminal of the inductor L1, and a second terminal of the first transistor Q1 is grounded. A first terminal of the second transistor Q2 is connected to the second terminal of the inductor L1, and a second terminal of the second transistor Q2 is connected to the power OUTPUT terminal OUTPUT. A first terminal of the third transistor Q3 is connected to the power INPUT terminal INPUT, and a second terminal of the third transistor Q3 is connected to a first terminal of the second capacitor C2. A first terminal of the fourth transistor Q4 is connected to a first terminal of the second capacitor C2, and a second terminal of the fourth transistor Q4 is connected to a first terminal of the inductor L1. A first terminal of the fifth transistor Q5 is connected to the second terminal of the second capacitor C2, and a second terminal of the fifth transistor Q5 is connected to the first terminal of the inductor L1. A first terminal of the sixth transistor Q6 is connected to the second terminal of the second capacitor C2, and a second terminal of the sixth transistor Q6 is grounded. The first capacitor C1 has a first terminal connected to the power OUTPUT terminal OUTPUT and a second terminal connected to ground.

Fig. 13 is an equivalent circuit diagram of the voltage converting unit 310 in the direct charging mode according to an embodiment, in which the output voltage of the charging device is equal to the input voltage of the battery, so as to implement the direct charging and the fast charging. Referring to fig. 13, in the direct charging mode, the third transistor Q3, the fourth transistor Q4 and the second transistor Q2 are turned on, the sixth transistor Q6, the fifth transistor Q5 and the first transistor Q1 are turned off, the power INPUT terminal INPUT and the first terminal of the inductor L1 are directly turned on, the inductor L1 operates in a direct current state, and the inductor L1 and the first capacitor C1 are charged. After the power in the inductor L1 and the first capacitor C1 is stabilized, the signal INPUT from the power INPUT terminal INPUT is used to power the battery.

Fig. 14 is an equivalent circuit diagram of the voltage converting unit 310 of the embodiment in the first stage of the high-voltage fast charging mode, in which the third transistor Q3, the fifth transistor Q5 and the second transistor Q2 are turned on, and the sixth transistor Q6, the fourth transistor Q4 and the first transistor Q1 are turned off, so as to turn on the first end of the second capacitor C2 and the power INPUT terminal INPUT, and turn on the second end of the second capacitor C2 and the first end of the inductor L1. The signal inputted from the power INPUT terminal INPUT is used to charge the second capacitor C2, the inductor L1 and the first capacitor C1. Fig. 15 is an equivalent circuit diagram of the voltage converting unit 310 of the embodiment in the second stage of the high-voltage fast charging mode, in which the sixth transistor Q6, the fourth transistor Q4, and the second transistor Q2 are turned on, the third transistor Q3, the fifth transistor Q5, and the first transistor Q1 are turned off, so as to turn on the first end of the second capacitor C2 and the first end of the inductor L1, ground the second end of the second capacitor C2, and connect the second capacitor C2 and the inductor L1 in series between the power INPUT terminal INPUT and the power OUTPUT terminal OUTPUT, and in parallel with the first capacitor C1. At this time, the second capacitor C2, the inductor L1 and the first capacitor C1 discharge together to charge the battery of the electronic device. In the first stage of the high-voltage fast charging mode, the inductor L1, the second capacitor C2 and the first capacitor C1 divide the voltage to reduce the voltage of the charging signal OUTPUT by the OUTPUT terminal OUTPUT to 1/N of the signal INPUT by the power INPUT terminal INPUT, the terminal voltages of the second capacitor C2 and the first capacitor C1 are both equal to the voltage of the charging signal, and then the second stage is entered, the second capacitor C2, the inductor L1 and the first capacitor C1 discharge together to charge the battery of the electronic device, and at this time, the voltage of the charging signal is still 1/N of the signal INPUT by the power INPUT terminal INPUT.

Fig. 16 is a third flowchart of a charging control method according to an embodiment, and referring to fig. 16, in the present embodiment, the charging control method includes steps 1602 to 1610.

Step 1602, obtaining a voltage value of an initial charging signal generated by the power generation sheet module 100 according to a temperature difference between the first end and the second end.

And 1604, acquiring the current voltage of the battery of the electronic device when the voltage value is larger than the voltage threshold.

Step 1606, determining a preset charging voltage corresponding to the current voltage.

Step 1608, controlling the voltage converting unit 310 to perform voltage boosting processing on the initial charging signal to generate a voltage converting signal with a preset charging voltage.

Step 1610, controlling the current regulating unit 320 to receive the voltage conversion signal and regulate the current of the voltage conversion signal to the target charging current.

Specifically, when the current voltage of the battery is lower than the threshold value of the battery for starting charging, the battery needs to be precharged with a large voltage and a small current to activate the active material of the battery, and after the threshold value of the battery for starting charging is reached, the charging current is increased to avoid the damage to the battery due to the overlarge current when the charging is started. Therefore, in the embodiment, the service life of the battery of the electronic device can be effectively prolonged by detecting the current voltage of the battery first.

It should be understood that, although the respective steps in the flowcharts of fig. 10, 11 and 16 are sequentially shown as indicated by arrows, the steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 10, 11, and 16 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternatingly with other steps or at least some of the sub-steps or stages of other steps.

Fig. 17 is a block diagram of a charging control apparatus according to an embodiment, and referring to fig. 17, in this embodiment, the charging control apparatus includes a voltage obtaining module 1702 and a signal adjusting module 1704.

A voltage obtaining module 1702, configured to obtain a voltage value of an initial charging signal generated by the power generating sheet module according to a temperature difference between the first end and the second end.

A signal adjusting module 1704, configured to control the power management module to receive the initial charging signal, determine a corresponding target charging current according to a first temperature signal and a second temperature signal when the voltage value is greater than a voltage threshold, and adjust a current of the initial charging signal to the target charging current to charge a battery of the electronic device, where the first temperature signal corresponds to a temperature of a first end of the power generation sheet module, and the second temperature signal corresponds to a temperature of a second end of the power generation sheet module.

The division of the modules in the charging control device is only for illustration, and in other embodiments, the charging control device may be divided into different modules as needed to complete all or part of the functions of the charging control device. For specific limitations of the charging control device, reference may be made to the above limitations of the charging control method, which are not described herein again. The respective modules in the charge control device described above may be implemented in whole or in part by software, hardware, and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

Fig. 18 is a schematic internal structure diagram of an electronic device in an embodiment. As shown in fig. 18, the electronic apparatus includes a processor and a memory connected by a system bus. Wherein, the processor is used for providing calculation and control capability and supporting the operation of the whole electronic equipment. The memory may include a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The computer program is executable by a processor to implement a charging control method provided in the following embodiments. The internal memory provides a cached execution environment for the operating system computer programs in the non-volatile storage medium. The electronic device may be any terminal device such as a mobile phone, a tablet computer, a PDA (Personal Digital Assistant), a Point of Sales (POS), a vehicle-mounted computer, and a wearable device.

The implementation of each module in the charge control apparatus provided in the embodiments of the present application may be in the form of a computer program. The computer program may be run on a terminal or a server. Program modules constituted by such computer programs may be stored on the memory of the electronic device. Which when executed by a processor, performs the steps of the method described in the embodiments of the present application.

The embodiment of the application also provides a computer readable storage medium. One or more non-transitory computer-readable storage media containing computer-executable instructions that, when executed by one or more processors, cause the processors to perform the steps of the charging control method.

A computer program product containing instructions which, when run on a computer, cause the computer to perform a charging control method.

Any reference to memory, storage, database, or other medium used herein may include non-volatile and/or volatile memory. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), synchronous Link (Synchlink) DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and bus dynamic RAM (RDRAM).

Fig. 19 is a schematic structural diagram of a mobile phone case according to an embodiment, and referring to fig. 19, in this embodiment, the mobile phone case includes a case and a charging device (not shown) as described above, the charging device is disposed on the case, and the charging device is used for charging a battery of an electronic device. Specifically, as shown in fig. 19, the charging device may be a wireless charging device including a wireless charging coil, and the charging device is completely embedded in the housing, so as to prevent the charging device from being exposed, and achieve safer and more convenient charging. In some embodiments, the mobile phone case may also include a connection line for connecting the charging device and the charging interface of the mobile phone to enable wired charging of the mobile phone battery. Alternatively, a heat conducting pad may be disposed on a side of the housing facing the electronic device to transmit the temperature of the electronic device to the housing, thereby regulating the temperature of the charging device.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express a few embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, variations and modifications can be made without departing from the concept of the embodiments of the present application, and these embodiments are within the scope of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the appended claims.

Claims

1. A charging device, comprising:

2. The charging device of claim 1, wherein the power management module comprises:

the voltage conversion unit is connected with the power generation sheet module and used for boosting the initial charging signal to generate a voltage conversion signal with a preset charging voltage;

and the current adjusting unit is respectively connected with the voltage converting unit and the temperature detecting module, and is used for determining a corresponding target charging current according to the first temperature signal and the second temperature signal, receiving the voltage converting signal, and adjusting the current of the voltage converting signal to the target charging current.

3. The charging device according to claim 2, wherein the current adjusting unit includes:

the differential amplifier is connected with the temperature detection module and used for acquiring the first temperature signal and the second temperature signal and generating a differential amplification signal according to the difference value between the first temperature signal and the second temperature signal;

the analog-to-digital converter is connected with the differential amplification unit and used for performing analog-to-digital conversion on the differential amplification signal so as to generate a current control signal corresponding to the temperature difference;

and the current regulator is respectively connected with the voltage conversion unit and the analog-to-digital converter and is used for regulating the current of the voltage conversion signal to a target charging current corresponding to the current control signal.

4. The charging device according to claim 3, wherein the temperature detection module comprises a first thermistor arranged at a first end of the power generation chip module and a second thermistor arranged at a second end of the power generation chip module, and the first end of the first thermistor and the first end of the second thermistor are respectively grounded;

the current adjusting unit further includes:

a first end of the first pull-up resistor is respectively connected with a second end of the first thermistor and one input end of the differential amplifier, and a second end of the first pull-up resistor is connected with a power supply voltage end;

and a first end of the second pull-up resistor is connected with a second end of the second thermistor and an input end of the differential amplifier, respectively, and a second end of the second pull-up resistor is connected with a power supply voltage end, wherein the power supply voltage end is used for receiving the voltage conversion signal or an externally input voltage signal.

5. The charging device according to claim 2, wherein the voltage conversion unit comprises a first energy storage element, a second energy storage element, a first switching element and a second switching element, a first end of the first energy storage element is connected to the power generation sheet module, a second end of the first energy storage element is connected to a first end of the first switching element and a first end of the second switching element, respectively, a second end of the first switching element is grounded, a first end of the second energy storage element is grounded, and a second end of the second energy storage element is connected to a second end of the second switching element, respectively, and serves as an output end of the voltage conversion unit;

wherein the voltage conversion unit is configured with a power strip charging mode comprising a first phase and a second phase, the first switching element being on and the second switching element being off when the voltage conversion unit is in the first phase; when the voltage conversion unit is in the second stage, the first switching element is turned off and the second switching element is turned on; the voltage conversion unit is used for being alternately in the first phase and the second phase under the control of a charging control instruction so as to generate the voltage conversion signal.

6. An electronic device, comprising:

a battery;

a rear cover;

the charging device according to any one of claims 1 to 5, wherein the charging device is disposed between the battery and the rear cover, the first end of the power generation sheet module in the charging device is a hot end, the hot end is disposed on a side close to the rear cover, the second end of the power generation sheet module in the charging device is a cold end, and the cold end is disposed on a side close to the battery.

7. A charging control method for controlling a charging device in an electronic device, the charging device including a power generation sheet module, a temperature detection module, and a power management module, the power generation sheet module including a first end and a second end, the method comprising:

8. The charge control method according to claim 7, wherein before obtaining the voltage value of the initial charge signal generated by the power generation sheet module according to the temperature difference between the first terminal and the second terminal, the method further comprises:

acquiring a connection state of a charging interface of the electronic equipment and external charging equipment;

the obtaining of the voltage value of the initial charging signal generated by the power generation sheet module according to the temperature difference between the first end and the second end includes:

and when the charging interface is not connected with external charging equipment, acquiring a voltage value of an initial charging signal generated by the power generation piece module according to the temperature difference between the first end and the second end.

9. The charge control method according to claim 8, characterized by further comprising:

when the charging interface is connected with external charging equipment, the power management module is controlled to receive an external charging signal from the charging interface to charge the battery of the electronic equipment.

10. The charging control method of claim 7, wherein the power management module comprises a voltage conversion unit and a current adjustment unit, and before determining the corresponding target charging current according to the first temperature signal and the second temperature signal, the method further comprises:

acquiring the current voltage of a battery of the electronic equipment;

determining a preset charging voltage corresponding to the current voltage;

controlling the voltage conversion unit to perform boosting processing on the initial charging signal to generate a voltage conversion signal with a preset charging voltage;

the determining a corresponding target charging current according to the first temperature signal and the second temperature signal, and adjusting the current of the initial charging signal to the target charging current includes:

and controlling the current regulating unit to receive the voltage conversion signal and regulate the current of the voltage conversion signal to the target charging current.

11. A handset housing, comprising:

a housing;

a charging arrangement as claimed in any one of claims 1 to 5, provided in the housing, for charging a battery of an electronic device.