CN106329689B - Adapter and method for realizing charging thereof - Google Patents
Adapter and method for realizing charging thereof Download PDFInfo
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- CN106329689B CN106329689B CN201510372610.9A CN201510372610A CN106329689B CN 106329689 B CN106329689 B CN 106329689B CN 201510372610 A CN201510372610 A CN 201510372610A CN 106329689 B CN106329689 B CN 106329689B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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Abstract
The invention discloses an adapter and a method for realizing charging thereof, comprising the following steps that the adapter detects the nominal battery capacity of a terminal; and determining the maximum allowable charging current according to the battery capacity of the current terminal, and outputting a second direct current signal according to the maximum allowable charging current. The invention can detect the battery capacity of the terminal which is accessed to charge currently, and adapt the maximum allowable charging current for charging the terminal according to the detected battery capacity, thereby meeting the charging requirements of the terminals with different charging current requirements and improving the universality of the charger and the terminal. Furthermore, the battery temperature of the currently accessed terminal is detected, and the charging is stopped in time when the battery temperature is too high, so that the battery is protected. Furthermore, the charging current of the battery is detected in real time, so that the charging process is always within the maximum allowable charging current range, and the charging integrity of the battery is ensured.
Description
Technical Field
The invention relates to a terminal charging technology, in particular to an adapter and a charging method thereof.
Background
The current implementation of terminal charging includes two parts, namely a charger and a charged terminal, from the physical functional division. The charger is responsible for converting high-voltage Alternating Current (AC) energy into low-voltage direct current energy, generally 5V voltage, so as to provide the low-voltage direct current energy for a terminal; the terminal itself is designed with a charging chip, which is responsible for performing specific charging management on the battery of the terminal itself, including management on external input current, battery charging current, charging voltage, and implementation of battery temperature protection.
The existing terminal charging technology has the following problems:
on the one hand, this is manifested by the non-versatility of the charger and the terminal. Various terminals have different battery capacities, so that different requirements are imposed on the maximum charging current, and further certain constraints are imposed on the input current. For example, a battery of 3000mAh, the maximum input current and the charging current are set to be 3A, so that a charger with an output capacity of 1A cannot be used for charging. On the other hand, when a terminal of a battery with a battery size of 2000mA is charged, the external energy input current drawn by the terminal is only 2A at the maximum for a charger with an output capacity of 3A, so that the external energy cannot be fully used.
On the other hand, high cost and large layout area are shown. The charging of the existing terminal is generally realized by adopting an integrated chip, particularly, the charging function of a switch type is realized, and the charging function of the existing terminal comprises the following components: the charging circuit comprises a charging chip, a power inductor, a power energy storage capacitor, a peripheral capacitor resistor and the like. These devices all suffer from cost and layout area issues. Moreover, each terminal product is designed with a charging chip, which brings complexity in design and increases cost, and also hinders further miniaturization of the terminal.
In addition, the general charging efficiency is 90%, for example, a 10W charging is realized, 1W of power is converted into heat power consumption, the heat generated by the charging is also obvious, the charging efficiency of the terminal is reduced, and the experience of a terminal user is also reduced.
Disclosure of Invention
In order to solve the technical problem, the invention provides an adapter and a charging method thereof, which can meet the charging requirements of terminals with different charging current requirements and improve the universality of a charger and the terminals.
To achieve the object of the present invention, the present invention provides an adapter comprising: the device comprises a power input module, a power output module, a battery capacity detection module, a temperature detection module and a control module; wherein,
the power supply input module is used for converting the accessed alternating current signal into a first direct current signal and outputting the first direct current signal to the power supply output module;
the power supply output module is used for receiving a first direct current signal from the power supply input module; providing a second direct current signal to the currently charged terminal under the control of the control module;
the temperature detection module is used for detecting a negative temperature coefficient NTC signal from the interior of a terminal battery accessed for charging so as to trigger the battery capacity detection module;
the battery capacity detection module is used for detecting the battery capacity of the terminal nominal and outputting the battery capacity to the control module;
and the control module is used for determining the maximum allowable charging current according to the battery capacity of the currently accessed and charged terminal and controlling the second direct current signal of the power output module according to the maximum allowable charging current.
Optionally, the temperature detection module is further configured to: and the NTC signal from the interior of the terminal battery is not detected, and the low power consumption mode is entered and the detection is continued.
Optionally, the temperature detection module is further configured to: acquiring temperature detection voltage from the detected NTC signal and outputting the temperature detection voltage to the control module;
the control module is further configured to: judging whether the temperature of the battery of the terminal accessed to charge currently is allowed to charge or not according to the temperature detection voltage, and continuously controlling the power output module to output a second direct-current voltage signal to the terminal when the charging is judged to be allowed; and when the charging is judged to be forbidden, controlling the power output module to cut off the output of the second direct current signal.
Optionally, the battery capacity detection module is specifically configured to:
detecting capacity configuration information from the terminal, and acquiring the nominal battery capacity of the terminal from the capacity configuration information;
alternatively, the corresponding battery capacity is obtained by detecting the capacity detection voltage of the terminal.
Optionally, the adapter further includes a battery charging current detection 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: and adjusting a second direct current signal of the power output module in real time according to the magnitude of the charging current of the battery, so that the second direct current signal is controlled within the maximum allowable charging current range.
Optionally, the battery charging current detection module is specifically configured to:
detecting the voltage across a current detection resistor in the terminal: the values of the first current detection voltage Vbat1 and the second current detection voltage Vbat 2;
the battery charging current is calculated according to the following formula: battery charging current (Vbat2-Vbat 1)/current detection resistance value.
The invention also provides a method for realizing charging of the adapter, which comprises the following steps: the adapter detects that the access of the terminal exists;
detecting the nominal battery capacity of the terminal;
and determining the maximum allowable charging current according to the battery capacity of the terminal which is currently accessed to be charged, and outputting a charging electric signal according to the maximum allowable charging current.
Optionally, the detecting, by the adapter, that there is terminal access includes: an NTC signal from inside a battery of the terminal is detected.
Optionally, the detecting a nominal battery capacity of the terminal includes:
detecting capacity configuration information from the terminal, and acquiring the nominal battery capacity of the terminal from the capacity configuration information;
alternatively, the corresponding battery capacity is obtained by detecting the capacity detection voltage of the terminal.
Optionally, a temperature control strategy is preset; the method further comprises the following steps:
acquiring temperature detection voltage from the detected NTC signal, judging whether the temperature of the battery of the terminal accessed to charge currently is allowed to charge according to the temperature detection voltage and a temperature control strategy, and continuously outputting a charging electric signal to the terminal when the charging is judged to be allowed; and when the charging is judged to be forbidden, the charging electric signal is disconnected.
Optionally, the method further comprises:
detecting the current battery charging current of the accessed terminal;
and adjusting the charging electric signal in real time according to a preset control strategy according to the magnitude of the charging current of the battery, so that the charging electric signal is controlled within the maximum allowable charging current range.
Optionally, the detecting the battery charging current of the currently accessed terminal includes:
detecting the voltage across a current detection resistor in the terminal: the values of the first current detection voltage Vbat1 and the second current detection voltage Vbat2 are calculated according to the following formula to obtain the battery charging current: battery charging current (Vbat2-Vbat 1)/current detection resistance value.
Compared with the prior art, the technical scheme of the application comprises the steps that the adapter detects that terminal access exists, and the nominal battery capacity of the terminal is detected; and determining the maximum allowable charging current according to the battery capacity of the terminal which is currently accessed to be charged, and outputting a second direct current signal according to the maximum allowable charging current. The charging mode of the invention can detect the battery capacity of the terminal which is accessed to be charged currently, and adapt the maximum allowable charging current for charging the terminal according to the detected battery capacity, thereby meeting the charging requirements of the terminals with different charging current requirements and improving the universality of the charger and the terminal.
Furthermore, the invention can stop charging in time when the temperature of the battery is overhigh by detecting the temperature of the battery of the currently accessed terminal, thereby realizing the protection of the battery and ensuring the normal realization of charging.
Furthermore, the invention ensures that the output current of the adapter is always within the maximum allowable charging current range in the whole charging process through the real-time detection of the charging current of the battery, thereby ensuring the integrity of the charging of the battery.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic diagram of the construction of the adapter of the present invention;
fig. 2 is a flowchart of a method for charging the adapter according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
Fig. 1 is a schematic diagram of a composition structure of an adapter of the present invention, and as shown in fig. 1, the adapter of the present invention at least includes a power input module, a power output module, a battery capacity detection module, a temperature detection module, and a control module; wherein,
and the power input module is used for converting the accessed alternating current signal into a first direct current signal and outputting the first direct current signal to the power output module. The power input module may be implemented by various high-efficiency alternating current-direct current (AC-DC) conversion modules, for example, an alternating current voltage of 220V is input, and a direct current voltage of 5V is output.
The power supply output module is used for receiving a first direct current signal from the power supply input module; providing a second direct current signal to the currently charged terminal under the control of the control module; the power output module can be implemented by a Low Dropout Regulator (LDO) or a high-efficiency direct current-direct current (DC-DC) converter, and the control module can be implemented by an I2C interface, or analog signal output by digital-to-analog conversion (DAC).
The Temperature detection module is used for detecting a Negative Temperature Coefficient (NTC) signal from the inside of the terminal battery so as to trigger the battery capacity detection module; further, the temperature detection module is also used for entering a low power consumption mode and continuing to detect when the NTC signal from the interior of the terminal battery is not detected. The NTC signal is an existing signal provided by a 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 decreases, and in particular the concepts known to those skilled in the art, and are not intended to limit the scope of the invention, it is emphasized that by detecting the NTC signal, in the presence of which a terminal is connected, it is indicated.
The battery capacity detection module is used for detecting the battery capacity of the terminal nominal and outputting the battery capacity to the control module; the method is specifically used for: detecting capacity configuration information from a terminal, and acquiring nominal battery capacity of the terminal from the capacity configuration information; alternatively, the corresponding battery capacity is obtained by detecting the capacity detection voltage of the terminal.
And the control module is used for determining the maximum allowable charging current according to the battery capacity of the currently accessed and charged terminal and controlling the second direct current signal of the power output module according to the maximum allowable charging current.
Here, the control module may determine the maximum allowable charging current according to a correspondence relationship between the battery capacity and the maximum allowable charging current, wherein the correspondence relationship between the battery capacity and the maximum allowable charging current may be as shown in table 1:
TABLE 1
The corresponding battery capacity can be obtained by detecting the capacity detection voltage of the terminal at the terminal side or the adapter side, and the specific implementation belongs to the conventional technical means of a person skilled in the art, and is not described herein again. It is emphasized here that the adapter of the present invention will detect the battery capacity of the terminal currently connected to the charging, and adapt the maximum allowable charging current for charging the terminal according to the detected battery capacity, thereby satisfying the charging requirements of terminals with different charging current requirements, and improving the versatility of the charger and the terminal.
Further, the air conditioner is provided with a fan,
the temperature detection module is further configured to: acquiring temperature detection voltage Vntc from the detected NTC signal and outputting the temperature detection voltage Vntc to the control module;
the control module is further to: judging whether the temperature of a battery of the terminal which is currently accessed to charge is allowed to charge or not according to the temperature detection voltage, and continuously outputting a second direct-current voltage signal to the terminal when the temperature of the battery of the terminal which is currently accessed to charge is judged to be allowed to charge; and when the charging is judged to be forbidden, the power output module is controlled to cut off the output of the second direct current signal. Here, the control module may determine whether to allow charging according to a correspondence relationship between the temperature detection voltage and the determination result, wherein the relationship between the specific temperature detection voltage and the determination result is shown in table 2:
TABLE 2
The adapter realizes the protection of the battery by detecting the battery temperature of the currently accessed terminal and also ensures the normal realization of charging.
Further, the air conditioner is provided with a fan,
the adapter also comprises a battery charging current detection module which is used for detecting the battery charging current of the currently accessed terminal and outputting the battery charging current to the control module; specifically, the battery charging current may be calculated by detecting the values of the voltages across the current detection resistors in the terminal, i.e., the first current detection voltage Vbat1 and the second current detection voltage Vbat2, and according to the following formula: the battery charging current (Vbat2-Vbat 1)/the current detection resistance value, the detection of the two voltage values may be implemented by using ADC differential sampling or analog amplification, and the specific implementation belongs to the known technology of those skilled in the art, and is not used to limit the protection scope of the present invention, and will not be described herein again.
The control module is further configured to: and adjusting the second direct current signal of the power output module in real time according to the charging current of the battery to enable the second direct current signal to be controlled within the maximum allowable charging current range so as to ensure the integrity of the battery charging. For example, the control strategy may be as shown in table 3:
TABLE 3
It should be noted that, when the power output module and the control module are connected by the I2When the C interface is connected, with I2The software of the C interface is configurable and can be directly passed through I2C, adjusting the amplitude of the output voltage of the power output module by software; if it is general I2C interface, through hardware setting, feedback realizes that output voltage adjusts, then can be through carrying out DAC to feedback signalAnd (4) simulating adjustment to realize adjustment of the output voltage. The detailed implementation is a matter of routine skill for those skilled in the art, and is not intended to limit the scope of the present invention, which is not described herein.
The adapter of the invention can ensure that the output current of the adapter is always within the maximum allowable charging current range in the whole charging process through the real-time detection of the charging current of the battery, thereby ensuring the integrity of the charging of the battery.
Those skilled in the art will readily understand that a charging terminal connected to the adapter 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, a battery capacity interface for outputting capacity configuration information, and a battery voltage detection interface for outputting a voltage across a current detection resistor, and the specific implementation of the interfaces belongs to the conventional technical means of those skilled in the art, and the specific implementation manner is not used to limit the protection scope of the present invention, as long as the required signal is correspondingly transmitted to the adapter and can receive the charging power from the adapter, and will not be described herein again.
Fig. 2 is a flowchart of a method for charging an adapter according to the present invention, where the adapter is connected to a power supply, such as a 220V ac signal, as shown in fig. 2, including:
step 200: the adapter detects the presence of terminal access.
This step may determine that there is a terminal access adapter, that is, that the accessed terminal has a charging requirement, by detecting an NTC signal from inside of the battery of the terminal.
Step 201: the nominal battery capacity of the terminal is detected.
The method comprises the following steps: and detecting the capacity configuration information from the terminal, and acquiring the nominal battery capacity of the terminal from the capacity configuration information. The capacity configuration information includes the maximum battery capacity configured by the terminal, that is, the maximum allowable charging current allowed to be charged;
or, at the terminal side or at the adapter side, the corresponding battery capacity is obtained by detecting the capacity detection voltage of the terminal, and the specific implementation belongs to the conventional technical means of those skilled in the art, and is not used to limit the protection scope of the present invention, and is not described herein again.
The method comprises the following steps: nominal battery capacity of terminal
How to obtain the nominal battery capacity of the terminal from the capacity configuration information in this step belongs to the conventional technical means of those skilled in the art, and the specific implementation is not used to limit the protection scope of the present invention, and is not described herein again.
Step 202: and determining the maximum allowable charging current according to the battery capacity of the currently accessed and charged terminal, and outputting a charging electric signal, namely a second direct current electric signal according to the maximum allowable charging current.
In this step, the correspondence between the battery capacity and the maximum allowable charging current is shown in table 1, and will not be described herein.
In this step, the charging electrical signal, i.e., the second dc electrical signal, is obtained after the external ac electrical signal, e.g., 220V, is converted into the first dc electrical signal, e.g., 5V, and then the maximum allowable charging current is controlled. The current of the second direct current signal is less than the maximum allowable charging current. How to control the output of the second dc signal according to the maximum allowable charging current belongs to the conventional technical means of those skilled in the art, and is not used to limit the protection scope of the present invention, and will not be described herein again.
The corresponding battery capacity can be obtained by detecting the capacity detection voltage of the terminal, and the specific implementation belongs to the conventional technical means of a person skilled in the art, and is not described herein again. It is emphasized here that the adapter of the present invention will detect the battery capacity of the terminal currently connected to the charging, and adapt the maximum allowable charging current for charging the terminal according to the detected battery capacity, thereby satisfying the charging requirements of terminals with different charging current requirements, and improving the versatility of the charger and the terminal.
Further, a temperature control strategy is preset; the method of the invention also comprises the following steps:
acquiring temperature detection voltage Vntc from the detected NTC signal, judging whether the temperature of a battery accessed to a charged terminal currently allows charging according to the temperature detection voltage and a temperature control strategy, and continuously outputting a second direct-current voltage signal to the terminal when the charging permission is judged; and when the charging is judged to be forbidden, controlling to cut off the output of the second direct current signal. The specific implementation of the temperature control strategy is shown in table 2, which is not described herein again.
The invention can stop charging in time when the battery temperature is overhigh by detecting the battery temperature of the currently accessed terminal, thereby realizing the protection of the battery and ensuring the normal realization of charging.
Further, the method of the invention also comprises the following steps:
detecting the battery charging current of the currently accessed terminal;
and adjusting the second direct current signal in real time according to a preset control strategy according to the magnitude of the charging current of the battery, so that the second direct current signal is controlled within the maximum allowable charging current range, and the charging integrity of the battery is ensured.
The battery charging current can be calculated by detecting the voltages across the current detection resistors in the terminal, namely the values of the first current detection voltage Vbat1 and the second current detection voltage Vbat2, according to the following formula: the battery charging current (Vbat2-Vbat 1)/the current detection resistance value, the detection of the two voltage values may be implemented by using ADC differential sampling or analog amplification, and the specific implementation belongs to the known technology of those skilled in the art, and is not used to limit the protection scope of the present invention, and will not be described herein again.
The control strategy may be as shown in table 3, which is not described herein.
According to the invention, through the real-time detection of the battery charging current, the output current of the adapter is always within the maximum allowable charging current range in the whole charging process, so that the integrity of the battery charging is ensured.
The above description is only a preferred example of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An adapter, comprising: the device comprises a power input module, a power output module, a battery capacity detection module, a temperature detection module and a control module; wherein,
the power supply input module is used for converting the accessed alternating current signal into a first direct current signal and outputting the first direct current signal to the power supply output module;
the power supply output module is used for receiving a first direct current signal from the power supply input module; providing a second direct current signal to the currently charged terminal under the control of the control module;
the temperature detection module is used for detecting a negative temperature coefficient NTC signal from the interior of a terminal battery accessed for charging so as to trigger the battery capacity detection module;
the battery capacity detection module is used for detecting the battery capacity of the terminal nominal and outputting the battery capacity to the control module;
and the control module is used for determining the maximum allowable charging current according to the battery capacity of the currently accessed and charged terminal and controlling the second direct current signal of the power output module according to the maximum allowable charging current.
2. The adapter of claim 1, wherein the temperature detection module is further configured to: and the NTC signal from the interior of the terminal battery is not detected, and the low power consumption mode is entered and the detection is continued.
3. The adapter of claim 2, wherein the temperature detection module is further configured to: acquiring temperature detection voltage from the detected NTC signal and outputting the temperature detection voltage to the control module;
the control module is further configured to: judging whether the temperature of the battery of the terminal accessed to charge currently is allowed to charge or not according to the temperature detection voltage, and continuously controlling the power output module to output a second direct-current voltage signal to the terminal when the charging is judged to be allowed; and when the charging is judged to be forbidden, controlling the power output module to cut off the output of the second direct current signal.
4. The adapter of claim 1, wherein the battery capacity detection module is specifically configured to:
detecting capacity configuration information from the terminal, and acquiring the nominal battery capacity of the terminal from the capacity configuration information;
alternatively, the corresponding battery capacity is obtained by detecting the capacity detection voltage of the terminal.
5. The adapter according to any one of claims 1 to 4, wherein the adapter further comprises a battery charging current detection module for detecting the battery charging current of the currently accessed terminal and outputting the detected battery charging current to the control module;
the control module is further configured to: and adjusting a second direct current signal of the power output module in real time according to the magnitude of the charging current of the battery, so that the second direct current signal is controlled within the maximum allowable charging current range.
6. The adapter of claim 5, wherein the battery charging current detection module is specifically configured to:
detecting the voltage across a current detection resistor in the terminal: the values of the first current detection voltage Vbat1 and the second current detection voltage Vbat 2;
the battery charging current is calculated according to the following formula: battery charging current (Vbat2-Vbat 1)/current detection resistance value.
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| PCT/CN2016/074702 WO2017000573A1 (en) | 2015-06-30 | 2016-02-26 | Adapter and charging method therewith |
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| CN106771503A (en) * | 2017-02-15 | 2017-05-31 | 广东小天才科技有限公司 | Voltage and current monitoring device and method |
| CN110620407A (en) * | 2018-06-19 | 2019-12-27 | 浙江万马新能源有限公司 | Quick-charging grading judgment device and working principle thereof |
| CN110212604B (en) * | 2019-05-30 | 2024-02-06 | 东莞盛世科技电子实业有限公司 | Charging method, charger and storage medium |
| CN113285500B (en) * | 2020-02-19 | 2022-10-14 | 青岛海信移动通信技术股份有限公司 | Mobile terminal and charging method thereof |
| CN111884292A (en) * | 2020-07-31 | 2020-11-03 | 苏州爱科赛博电源技术有限责任公司 | Intelligent charger capable of automatically identifying external adapter and charging method |
| CN112968483A (en) * | 2021-01-18 | 2021-06-15 | 深圳市华联通信息系统有限公司 | Intelligent adaptive power supply charging detection system and method |
| CN112994178B (en) * | 2021-04-15 | 2024-05-31 | 深圳市伊爱高新技术开发有限公司 | Self-adaptive charging method for Beidou positioning terminal |
| CN114336843B (en) * | 2021-12-28 | 2024-06-07 | 歌尔科技有限公司 | Chargeable terminal equipment and charging system thereof |
| CN115360782B (en) * | 2022-07-31 | 2024-07-05 | 华为技术有限公司 | Charging method, electronic device, computer-readable storage medium, and chip system |
| CN118281997B (en) * | 2024-05-30 | 2024-09-13 | 东莞市奥源电子科技有限公司 | Self-adaptive control circuit and method for charger |
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| CN101399386B (en) * | 2007-09-25 | 2012-04-18 | 南京德朔实业有限公司 | Lithium battery pack and charging method thereof |
| CN102122739A (en) * | 2010-12-29 | 2011-07-13 | 华为终端有限公司 | Charging method and user equipment |
| CN103199600A (en) * | 2013-04-03 | 2013-07-10 | 深圳市晶福源电子技术有限公司 | Charge control circuit and charge control method |
| CN103701173A (en) * | 2013-12-30 | 2014-04-02 | 山东申普交通科技有限公司 | Intelligent charger and charging control strategies |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2017000573A1 (en) | 2017-01-05 |
| CN106329689A (en) | 2017-01-11 |
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