WO2017000573A1

WO2017000573A1 - Adapter and charging method therewith

Info

Publication number: WO2017000573A1
Application number: PCT/CN2016/074702
Authority: WO
Inventors: 牛景涛
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-06-30
Filing date: 2016-02-26
Publication date: 2017-01-05
Also published as: CN106329689B; CN106329689A

Abstract

An adapter and charging method therewith. The adapter comprises: a power supply input module, a power supply output module, a battery capacity detection module, a temperature detection module and a control module. The adapter performs detection on a nominal battery capacity of a terminal, determines a maximum permitted charging current according to the battery capacity of the current terminal, and outputs a charging electrical signal in compliance with the maximum permitted charging current. The charging method performs detection on a battery capacity of a terminal currently connected for charging, and adapts for a maximum permitted charging current for charging the terminal, thus meeting the charging demands of terminals having different charging current requirements, and improving universality of a charger for terminals. In addition, a battery temperature of a currently connected terminal is detected to terminate charging in a timely manner when the battery temperature is too high, thus protecting the battery. Moreover, real-time detection of a charging current of a battery enables an output current of the adapter to be within a range of a maximum permitted charging current throughout the entire charging process, thus ensuring the integrity of battery charging.

Description

Adapter and method for realizing charging thereof

Technical field

The present application relates to, but is not limited to, terminal charging technology, and more particularly to an adapter and a method thereof for implementing charging.

Background technique

The current terminal charging implementation includes two parts from the physical function, namely the charger and the charged terminal. The charger is responsible for converting the high-voltage electric energy of the alternating current (AC) into the low-voltage energy of the direct current, generally 5V, for providing to the terminal; and the terminal itself is designed with a charging chip, which is responsible for the terminal. The battery itself performs specific charge management, including the management of external input current, battery charging current, charge voltage management, and battery temperature protection.

The existing terminal charging technology has the following problems:

On the one hand, it is manifested as the non-universality of the charger and the terminal. Various terminals have different battery capacities, so there are different requirements for the maximum charging current, and the input current is further constrained. For example, a 3000mAh battery, the maximum input current and charging current are generally 3A, so that it is impossible to charge with a charger with an output capacity of 1A. When charging a terminal with a battery size of 2000 mA, for a charger with an output capacity of 3 A, since the external energy input current drawn by the terminal is only 2 A at the maximum, the external energy cannot be fully utilized.

On the other hand, it shows high cost and large layout area. The charging implementation of the existing terminal generally adopts an integrated chip, in particular, a switching type charging function, and the composition thereof includes a charging chip, a power inductor and a power storage capacitor, and a peripheral capacitor resistor. These devices all have problems with cost and layout area. Moreover, each terminal product is designed with a charging chip, which brings design complexity and increases cost, and also hinders further miniaturization of the terminal.

In addition, the general charging efficiency is 90%, such as a 10W charging implementation, which will convert 1W of power into thermal power consumption, and the heating caused by charging is also obvious, which reduces the charging efficiency of the terminal and reduces the end user's Experience.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

Embodiments of the present invention provide an adapter and a method for implementing the same, which can meet the charging requirements of terminals with different charging current requirements, and improve the versatility of the charger and the terminal.

In order to achieve the purpose of the present application, an embodiment of the present invention provides an adapter, including: a power input module, a power output module, a battery capacity detecting module, a temperature detecting module, and a control module;

The power input module is configured to: convert the connected alternating current signal into a first direct current signal, and output the signal to the power output module;

a power output module, configured to: receive a first direct current signal from the power input module; and provide a second direct current signal to the currently charged terminal under the control of the control module;

a temperature detecting module configured to: trigger a battery capacity detecting module when detecting a negative temperature coefficient (NTC) signal from a terminal battery that is connected to the charging;

The battery capacity detecting module is configured to: detect a nominal battery capacity of the terminal and output the same to the control module;

The control module is configured to: determine a maximum allowable charging current according to a battery capacity of the terminal currently connected to the charging, and control a second direct current signal output by the power output module according to the maximum allowable charging current.

Optionally, the temperature detecting module is further configured to enter a low power mode and continue detecting when the NTC signal from the terminal battery is not detected.

Optionally,

The temperature detecting module is further configured to: obtain a temperature detecting voltage from the detected NTC signal, and output the voltage to the control module;

The control module is further configured to: determine, according to the temperature detection voltage, whether the battery temperature of the currently connected terminal is allowed to be charged, and continue to control the power output module to output the second DC to the terminal when determining that charging is allowed a voltage signal; when it is determined that charging is prohibited, the power is controlled The source output module disconnects the output of the second direct current signal.

Optionally, the battery capacity detecting module is configured to:

Detecting capacity configuration information from the terminal, and obtaining a nominal battery capacity of the terminal; or

The corresponding battery capacity is obtained by detecting the capacity detection voltage of the terminal.

Optionally, the adapter further includes: a battery charging current detecting module, configured to: detect a battery charging current of the currently accessed terminal, and output the battery charging current to the control module;

The control module is further configured to adjust a second direct current signal output by the power output module in real time to be controlled within the maximum allowable charging current range according to a magnitude of a battery charging current.

Optionally, the battery charging current detection module is configured to:

Detecting a value of the first current-sense voltage Vbat1 and the second current-sense voltage Vbat2 across the current-sense resistor in the terminal;

Calculate the battery charging current according to the following formula:

Battery charging current = (Vbat2-Vbat1) / current-sense resistor value.

An embodiment of the present invention further provides a method for an adapter to implement charging, including:

The adapter detects that there is terminal access;

Detecting the nominal battery capacity of the terminal;

The maximum allowable charging current is determined according to the battery capacity of the terminal currently being charged, and the charging electrical signal is output according to the maximum allowable charging current.

Optionally, the detecting that the presence of the terminal access comprises detecting an NTC signal from a battery inside the terminal.

Optionally, the nominal battery capacity of the detecting terminal includes:

Optionally, the method further includes:

Obtaining a temperature detection voltage from the detected NTC signal, determining whether the battery temperature of the currently connected terminal is allowed to be charged according to the temperature detection voltage and a preset temperature control strategy, and continuing to determine whether charging is allowed, continuing And outputting a charging electrical signal to the terminal; and when it is determined that charging is prohibited, the charging electrical signal is turned off.

Optionally, the method further includes:

Detecting a battery charging current of the currently accessed terminal;

According to the magnitude of the battery charging current, the charging electrical signal is adjusted in real time according to a preset control strategy to be controlled within the maximum allowable charging current range.

Optionally, the detecting a battery charging current of the currently accessed terminal includes:

Detecting a value of the first current-sense voltage Vbat1 and the second current-sense voltage Vbat2 across the current-sense resistor in the terminal, and calculating the battery charging current according to the following formula:

Battery charging current = (Vbat2-Vbat1) / current-sense resistor value.

Compared with the prior art, the technical solution of the present application includes: the adapter detects that there is terminal access, detects the nominal battery capacity of the terminal; determines the maximum allowable charging current according to the battery capacity of the terminal currently connected to the charging, and according to the maximum allowable charging The current outputs a second direct current signal. The charging method provided by the embodiment of the present invention detects the battery capacity of the terminal currently connected to the charging, and adapts the maximum allowable charging current for charging the terminal according to the detected battery capacity, thereby satisfying different charging currents. The required charging requirements of the terminal enhance the versatility of the charger and the terminal.

Optionally, the embodiment of the invention detects the battery temperature of the currently accessed terminal, stops charging in time when the battery temperature is too high, realizes protection of the battery, and ensures that the charging is normally implemented.

Optionally, the embodiment of the invention ensures real-time detection of the charging current of the battery, so that the output current of the adapter is always within the maximum allowable charging current during the entire charging process, thereby ensuring the integrity of the battery charging.

Other features and advantages of the present application will be set forth in the description which follows. The objectives and other advantages of the present invention can be realized and obtained by the structure of the invention.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

The drawings described herein are intended to provide a further understanding of the present application, and are intended to be a part of this application. In the drawing:

1 is a schematic structural diagram of an adapter according to an embodiment of the present invention;

FIG. 2 is a flowchart of a method for implementing charging by an adapter according to an embodiment of the present invention.

Embodiments of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

FIG. 1 is a schematic structural diagram of an adapter according to an embodiment of the present invention. As shown in FIG. 1 , an adapter provided by an embodiment of the present invention includes at least a power input module, a power output module, a battery capacity detecting module, a temperature detecting module, and a control module;

The power input module is configured to: convert the connected AC signal into a first DC signal, and output the signal to the power output module. Among them, the power input module can be realized by various high-efficiency AC-DC conversion modules, such as an input AC voltage of 220V, and an output of 5V DC voltage.

The power output module is configured to: receive the first DC signal from the power input module; provide a second DC signal to the currently charged terminal under the control of the control module; wherein the power output module can adopt a low dropout linear regulator (LDO) , Low Dropout Regulator), or high-efficiency DC-DC converter implementation, can use two-wire serial bus (I2C, Inter-Integrated Circuit) interface, or digital-to-analog conversion ( DAC, Digital-to-Analog Convert) implements the analog signal output.

The temperature detecting module is configured to: when detecting a negative temperature coefficient (NTC) signal from the terminal battery, trigger a battery capacity detecting module; optionally, the temperature detecting module is further configured to: When the NTC signal inside the terminal battery enters Low power mode and continue to detect. Among them, the NTC signal is an existing signal provided by the battery of the existing terminal, and is simply a signal generated by a voltage dividing circuit composed of a fixed resistor and an NTC resistor. Since the resistance of the NTC resistor decreases linearly with increasing temperature, the voltage across the NTC resistor will decrease, and is specifically a concept well known to those skilled in the art, and is not intended to limit the scope of protection of the present application. The detection of the NTC signal indicates that there is terminal access when the signal is present.

The battery capacity detecting module is configured to: detect a nominal battery capacity of the terminal and output the same to the control module; optionally, the battery capacity detecting module is configured to: detect capacity configuration information from the terminal, and obtain a battery of the terminal nominal Capacity; or, by detecting the capacity detection voltage of the terminal, the corresponding battery capacity is obtained.

Here, the control module can determine the maximum allowable charging current according to the correspondence between the battery capacity and the maximum allowable charging current, wherein the correspondence between the battery capacity and the maximum allowable charging current can be as shown in Table 1:

Table 1

Wherein, the detection of the capacity detection voltage of the terminal can be performed on the terminal side or the adapter side, The corresponding battery capacity is obtained, and the conventional technical means belonging to those skilled in the art are specifically implemented, and details are not described herein again. It is emphasized that the adapter provided by the embodiment of the present invention detects the battery capacity of the terminal currently connected to the charging, and adapts the maximum allowable charging current for charging the terminal according to the detected battery capacity, thereby It satisfies the charging requirements of terminals with different charging current requirements, and improves the versatility of the charger and the terminal.

Optionally,

The temperature detecting module is further configured to: obtain a temperature detecting voltage Vntc from the detected NTC signal, and output the signal to the control module;

The control module is further configured to: determine, according to the temperature detection voltage, whether the battery temperature of the terminal currently connected to the charging is allowed to be charged, and when determining that the charging is allowed, continue to output the second DC voltage signal to the terminal; and when determining that charging is prohibited, the control power source The output module disconnects the output of the second direct current signal. Here, the control module may determine whether charging is allowed according to the correspondence between the temperature detection voltage and the determination result, wherein the relationship between the temperature detection voltage and the determination result is as shown in Table 2:

Table 2

The adapter provided by the embodiment of the invention realizes the protection of the battery by detecting the battery temperature of the currently accessed terminal, and also ensures that the charging is normally realized.

Optionally,

The adapter provided by the embodiment of the present invention further includes a battery charging current detecting module configured to: detect a battery charging current of the currently accessed terminal, and output the battery charging current to the control module; optionally, detecting the two ends of the current detecting resistor in the terminal The value of the voltage (ie, the first sense voltage Vbat1 and the second sense voltage Vbat2), and calculate the battery charge current according to the following formula:

Battery charging current = (Vbat2-Vbat1) / current-sense resistor value.

The detection of the two voltage values may be implemented by analog-to-digital conversion (ADC), or analog amplification, and the implementation is well known to those skilled in the art, and is not intended to limit the protection of the present application. The scope is not repeated here.

The control module is further configured to: according to the magnitude of the battery charging current, adjust the second DC signal output by the power output module in real time according to a preset control strategy, so as to be controlled within the maximum allowable charging current range to ensure the integrity of the battery charging. . For example, the control strategy can be as shown in Table 3:

table 3

It should be noted that when an I2C interface can be used between the power output module and the control module, And the software of the I2C interface can be configured, and the amplitude of the output voltage of the power output module can be directly adjusted by the I2C software; if it is a general I2C interface, the output voltage is adjusted through hardware setting and feedback, then the DAC can be simulated by the feedback signal. Adjust to achieve adjustment of the output voltage. The specific implementation of the present invention is not limited to the scope of protection of the present application, and details are not described herein again.

The adapter provided by the embodiment of the invention ensures real-time detection of the charging current of the battery, so that the output current of the adapter is always within the maximum allowable charging current during the entire charging process, thereby ensuring the integrity of the battery charging.

A person skilled in the art can easily understand that a charging terminal connected to the adapter provided by the embodiment of the present invention should be provided with a corresponding signal output/input interface, such as a charging power interface for connecting a second DC signal, a battery temperature interface for outputting an NTC signal, The battery capacity interface for outputting the capacity configuration information and the battery voltage detection interface for outputting the voltage across the current-sense resistor, the specific implementation of the interface belongs to the technical means of those skilled in the art, and the specific implementation manner is not limited to the scope of protection of the present application, as long as The corresponding signal is transmitted to the adapter and can receive the charging power from the adapter, which will not be described here.

FIG. 2 is a flowchart of a method for charging an adapter according to an embodiment of the present invention. The adapter is connected to a power source such as a 220V AC signal. As shown in FIG. 2, the method includes the following steps:

Step 200: The adapter detects that there is terminal access.

In this step, by detecting the NTC signal inside the battery from the terminal, it is determined that the terminal accessed by the terminal access adapter has a charging requirement.

Step 201: Detect the nominal battery capacity of the terminal.

The step includes: detecting capacity configuration information from the terminal, and obtaining a nominal battery capacity of the terminal; wherein the capacity configuration information includes a maximum battery capacity configured by the terminal, that is, a maximum allowable charging current that allows charging;

Alternatively, on the terminal side or on the adapter side, the corresponding battery capacity is obtained by detecting the capacity detection voltage of the terminal, and the specific technical means belonging to those skilled in the art are specifically implemented, and are not used to limit the protection scope of the present application. No longer.

In this step, how to obtain the nominal battery capacity of the terminal from the capacity configuration information belongs to the field. The technical means of the skilled person is not limited to the scope of protection of the present application, and details are not described herein again.

Step 202: Determine a maximum allowable charging current according to a battery capacity of the terminal currently connected to the charging, and output a charging electrical signal (ie, a second direct current signal) according to the maximum allowable charging current.

In this step, the correspondence between the battery capacity and the maximum allowable charging current is as shown in Table 1, and will not be described here.

In this step, the charging electrical signal (ie, the second direct current signal) is obtained after the external alternating current signal (eg, 220V) is converted into the first direct current signal (eg, 5V), and then controlled by the maximum allowable charging current. The current of the second direct current signal is less than the maximum allowable charging current. Specifically, how to control the output of the second direct current signal according to the maximum allowable charging current belongs to the technical means of those skilled in the art, and is not intended to limit the scope of protection of the present application, and details are not described herein again.

The detection of the capacity detection voltage of the terminal can be used to obtain the corresponding battery capacity, and the conventional technical means belonging to those skilled in the art can be specifically implemented, and details are not described herein again. It is emphasized that the adapter provided by the embodiment of the present invention detects the battery capacity of the terminal currently connected to the charging, and adapts the maximum allowable charging current for charging the terminal according to the detected battery capacity, thereby It satisfies the charging requirements of terminals with different charging current requirements, and improves the versatility of the charger and the terminal.

Optionally, the method provided by the embodiment of the present invention further includes:

Obtaining a temperature detection voltage Vntc from the detected NTC signal, determining whether the battery temperature of the terminal currently connected to the charging is allowed to be charged according to the temperature detection voltage and a preset temperature control strategy, and continuing to output to the terminal when determining that charging is permitted a second DC voltage signal; controlling to turn off the output of the second DC signal when it is determined that charging is prohibited. The specific implementation of the temperature control strategy is shown in Table 2, and will not be described here.

The embodiment of the invention detects the battery temperature of the currently accessed terminal, stops charging in time when the battery temperature is too high, realizes protection of the battery, and ensures that the charging is normally realized.

Detecting the battery charging current of the currently accessed terminal;

According to the size of the battery charging current, the second DC is adjusted in real time according to a preset control strategy. The electrical signal is controlled to be within the maximum allowable charging current range to ensure the integrity of the battery charging.

Wherein, the value of the voltage across the current-sense resistor in the terminal (ie, the first current-sense voltage Vbat1 and the second current-sense voltage Vbat2) can be detected, and the battery charging current is calculated according to the following formula:

Battery charging current = (Vbat2-Vbat1) / current-sense resistor value.

The detection of the two voltage values may be implemented by using the ADC differential sampling, or the analog amplification method. The specific implementation is not limited to the scope of protection of the present application, and details are not described herein again.

The control strategy can be as shown in Table 3, and is not described here.

In the embodiment of the invention, the real-time detection of the charging current of the battery is such that the output current of the adapter is always within the maximum allowable charging current during the entire charging process, thereby ensuring the integrity of the battery charging.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function. This application is not limited to any specific combination of hardware and software.

The above descriptions are only preferred examples of the present application and are not intended to limit the scope of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application are intended to be included within the scope of the present application.

Industrial applicability

An embodiment of the present invention provides an adapter and a method for implementing charging thereof, by detecting a battery capacity of a terminal currently connected to charging, and adapting a maximum allowable charging current for charging the terminal according to the detected battery capacity. In order to meet the charging requirements of terminals with different charging current requirements, the versatility of the charger and the terminal is improved.

Claims

An adapter includes: a power input module, a power output module, a battery capacity detecting module, a temperature detecting module, and a control module; wherein

The power input module is configured to: convert the connected alternating current signal into a first direct current signal, and output the signal to the power output module;

a power output module, configured to: receive a first direct current signal from the power input module; and provide a second direct current signal to the currently charged terminal under the control of the control module;

The temperature detecting module is configured to: when detecting a negative temperature coefficient NTC signal from the terminal battery that is connected to the charging, triggering the battery capacity detecting module;

The battery capacity detecting module is configured to: detect a nominal battery capacity of the terminal and output the same to the control module;

The control module is configured to: determine a maximum allowable charging current according to a battery capacity of the terminal currently connected to the charging, and control a second direct current signal output by the power output module according to the maximum allowable charging current.
The adapter of claim 1, wherein the temperature detecting module is further configured to enter a low power mode and continue detecting when an NTC signal from the interior of the terminal battery is not detected.
The adapter according to claim 2, wherein

The temperature detecting module is further configured to: obtain a temperature detecting voltage from the detected NTC signal, and output the voltage to the control module;

The control module is further configured to: determine, according to the temperature detection voltage, whether the battery temperature of the currently connected terminal is allowed to be charged, and continue to control the power output module to output the second DC to the terminal when determining that charging is allowed a voltage signal; when it is determined that charging is prohibited, the power output module is controlled to disconnect the output of the second direct current signal.
The adapter of claim 1 wherein said battery capacity detection module is configured to:

Detecting capacity configuration information from the terminal, and obtaining a nominal battery capacity of the terminal; or

The corresponding battery capacity is obtained by detecting the capacity detection voltage of the terminal.
The adapter according to any one of claims 1 to 4, further comprising: a battery charging current detecting module, configured to: detect a battery charging current of the currently accessed terminal, and output the battery charging current to the control module;

The control module is further configured to adjust a second direct current signal output by the power output module in real time according to a magnitude of a battery charging current to be controlled within the maximum allowable charging current range.
The adapter of claim 5 wherein said battery charging current detection module is configured to:

Detecting a value of the first current-sense voltage Vbat1 and the second current-sense voltage Vbat2 across the current-sense resistor in the terminal;

Calculate the battery charging current according to the following formula:

Battery charging current = (Vbat2-Vbat1) / current-sense resistor value.
A method for an adapter to implement charging, comprising:

The adapter detects that there is terminal access;

Detecting the nominal battery capacity of the terminal;

The maximum allowable charging current is determined according to the battery capacity of the terminal currently being charged, and the charging electrical signal is output according to the maximum allowable charging current.
The method of claim 7, wherein the detecting that the presence of the terminal access comprises detecting a negative temperature coefficient NTC signal internal to the battery from the terminal.
The method of claim 7 wherein said detecting the nominal battery capacity of the terminal comprises:

Detecting capacity configuration information from the terminal, and obtaining a nominal battery capacity of the terminal; or

The corresponding battery capacity is obtained by detecting the capacity detection voltage of the terminal.
The method of claim 8 further comprising:

Obtaining a temperature detection voltage from the detected NTC signal, and detecting a voltage and a pre-detection according to the temperature Firstly, the temperature control strategy is set to determine whether the battery temperature of the currently connected terminal is allowed to be charged, and when it is determined that charging is allowed, continue to output a charging electrical signal to the terminal; when it is determined that charging is prohibited, the device is disconnected The charging electrical signal is described.
The method of claim 7, 8 or 10, further comprising:

Detecting a battery charging current of the currently accessed terminal;

According to the magnitude of the battery charging current, the charging electrical signal is adjusted in real time according to a preset control strategy to be controlled within the maximum allowable charging current range.
The method of claim 11, wherein the detecting the battery charging current of the currently accessed terminal comprises:

Detecting a value of the first current-sense voltage Vbat1 and the second current-sense voltage Vbat2 across the current-sense resistor in the terminal, and calculating the battery charging current according to the following formula:

Battery charging current = (Vbat2-Vbat1) / current-sense resistor value.