CN107968472B - Charger and control method thereof - Google Patents
Charger and control method thereof Download PDFInfo
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- CN107968472B CN107968472B CN201711194151.5A CN201711194151A CN107968472B CN 107968472 B CN107968472 B CN 107968472B CN 201711194151 A CN201711194151 A CN 201711194151A CN 107968472 B CN107968472 B CN 107968472B
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- 230000008569 process Effects 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
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- 229920006395 saturated elastomer Polymers 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
- H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
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- H02J7/027—
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- H02J7/045—
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00711—Regulation of charging or discharging current or voltage with introduction of pulses during the charging process
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a charger and a control method thereof, wherein the charger comprises: the charging unit is used for converting input alternating current into required first direct current so as to charge a charging load; the control unit is used for judging whether the electric quantity of the charging load is full according to the working frequency of the charging unit when the charging unit is charging the charging load so as to determine whether to continue charging the charging load. The scheme provided by the invention can judge whether the electric quantity of the charging load is full through detecting the working frequency of the switching power supply, and the charger can automatically disconnect the charging load after the full electric quantity of the charging load is detected.
Description
Technical Field
The invention relates to the field of control, in particular to a charger and a control method thereof.
Background
Along with the continuous promotion of smart machine performance, battery power consumption is faster and faster, and the battery ageing, the electric power storage capacity of smart machine such as cell-phone, panel computer decline fast has become the problem that is difficult to solve. Most users develop the habit of using the device in the daytime and charging the device when sleeping at night, and sometimes the device is continuously charged for one night or half a day. In fact, the charging of the devices such as the mobile phone does not require a long time, the long-time charging causes the idle consumption of the charger, the battery and the devices are also greatly damaged, and even the potential safety hazard of battery explosion occurs.
Disclosure of Invention
The main objective of the present invention is to overcome the above-mentioned drawbacks of the prior art, and to provide a charger and a control method thereof, so as to solve the problems of the prior art that the device is charged for a long time, which results in the idle consumption of the charger and the damage to the device and its battery.
One aspect of the present invention provides a charger including: the charging unit is used for converting input alternating current into required first direct current so as to charge a charging load; the control unit is used for judging whether the electric quantity of the charging load is full according to the working frequency of the charging unit when the charging unit is charging the charging load so as to determine whether to continue charging the charging load.
Optionally, the control unit is further configured to: when the charging unit does not charge the charging load, whether the charging load which is not fully charged is accessed is determined according to the voltage of the output end of the charging unit, and if so, the charging unit is controlled to charge the accessed charging load which is not fully charged.
Optionally, the charging unit includes: the switching power supply is used for converting an alternating current input power supply into a required first direct current voltage; the operating frequency of the charging unit includes an operating frequency of the switching power supply.
Optionally, the charging unit further includes: the rectification filter circuit is used for carrying out rectification filter processing on the input alternating current to obtain second direct current; and the switching power supply is used for converting the second direct current into the required first direct current.
Optionally, the control unit includes: a frequency detection unit for detecting an operating frequency of the switching power supply when the charging unit is charging a charging load; and the charging control unit is used for judging whether the electric quantity of the charging load is full according to the working frequency of the switching power supply detected by the frequency detection unit, and controlling the charging unit to continue charging the charging load under the condition that the electric quantity of the charging load is not full, or controlling the charging unit to stop charging the charging load under the condition that the electric quantity of the charging load is full.
Optionally, the determining, by the charging control unit, whether the electric quantity of the charging load is full according to the operating frequency of the switching power supply detected by the frequency detection unit includes: judging whether the switching frequency of the switching power supply detected by the frequency detection unit is greater than a first preset frequency threshold value; if the switching frequency of the switching power supply is less than or equal to the first preset frequency threshold, determining that the electric quantity of the charging load is full, or if the switching frequency of the switching power supply is less than or equal to the first preset frequency threshold and lasts for a first preset time, determining that the electric quantity of the charging load is full; and if the switching frequency of the switching power supply is greater than the first preset frequency threshold value, determining that the electric quantity of the charging load is not fully charged.
Optionally, the control unit further includes: the voltage detection unit is used for detecting the voltage of the output end of the charging unit when the charging unit does not charge the charging load; the charging control unit is further configured to: and determining whether an incompletely charged charging load is connected according to the voltage of the output end detected by the voltage detection unit, and controlling the charging unit to charge the incompletely charged charging load when the incompletely charged charging load is determined to be connected.
Optionally, the charging control unit, determining whether an incompletely charged charging load is connected according to the voltage of the output terminal detected by the voltage detection unit, includes: judging whether the voltage of the output end detected by the voltage detection unit is greater than a first preset voltage threshold and smaller than a second preset voltage threshold; if the voltage of the output end is greater than a first preset voltage threshold and smaller than a second preset voltage threshold, determining that an incompletely charged charging load is accessed; and if the voltage of the output end is less than or equal to a first preset voltage threshold value or greater than or equal to a second preset voltage threshold value, determining that no fully-charged charging load is connected.
Optionally, the charging control unit is connected to an output end of the charging unit to supply power to the charging control unit through the charging unit; alternatively, the control unit further comprises: and the conversion power supply is used for obtaining a third direct current for supplying power to the charging control unit.
Optionally, the method further comprises: and the control unit controls whether the charging unit charges the charging load or not by controlling the on/off of the control switch.
Optionally, in a case that the control unit includes a charging control unit, when the charging control unit is connected to the output terminal of the charging unit, the control switch is disposed between the output terminal of the charging unit and a charging load; or, when the control unit further comprises a switching power supply, the control switch is arranged at the input end of the charging unit.
Another aspect of the present invention provides a control method for the charger described in any one of the preceding paragraphs, including: when the charging unit is charging a charging load, judging whether the electric quantity of the charging load is full according to the working frequency of the charging unit so as to determine whether to continue charging the charging load.
Optionally, when the charging unit includes a switching power supply, determining whether the charging load is fully charged according to the operating frequency of the charging unit to determine whether to continue charging the charging load, including: detecting the working frequency of the switching power supply under the condition that the charging unit is charging a charging load; judging whether the electric quantity of the charging load is full according to the detected working frequency of the switching power supply; and controlling the charging unit to continue to charge the charging load under the condition that the electric quantity of the charging load is not full, or controlling the charging unit to stop charging the charging load under the condition that the electric quantity of the charging load is full.
Optionally, the determining whether the charging load is fully charged according to the detected operating frequency of the switching power supply includes: judging whether the detected switching frequency of the switching power supply is greater than a first preset frequency threshold value; if the switching frequency of the switching power supply is less than or equal to the first preset frequency threshold, determining that the electric quantity of the charging load is full, or if the switching frequency of the switching power supply is less than or equal to the first preset frequency threshold and lasts for a first preset time, determining that the electric quantity of the charging load is full; and if the switching frequency of the switching power supply is greater than the first preset frequency threshold value, determining that the electric quantity of the charging load is not fully charged.
Optionally, the method further comprises: detecting the voltage of the output end of the charging unit when the charging unit does not charge a charging load; and determining whether an incompletely charged charging load is connected according to the detected voltage of the output end, and if so, controlling the charging unit to charge the connected incompletely charged charging load.
Optionally, determining whether an under-charged charging load is connected according to the voltage at the output terminal of the charging unit includes: judging whether the detected voltage of the output end is larger than a first preset voltage threshold and smaller than a second preset voltage threshold; if the voltage of the output end is greater than a first preset voltage threshold and smaller than a second preset voltage threshold, determining that an incompletely charged charging load is accessed; and if the voltage of the output end is less than or equal to a first preset voltage threshold value or greater than or equal to a second preset voltage threshold value, determining that no fully-charged charging load is connected.
According to the technical scheme of the invention, whether the electric quantity of the charging load is fully charged is judged by detecting the working frequency of the switching power supply, and the charger can automatically disconnect the charging load after the electric quantity of the charging load is fully charged, so that the overcharge of the battery of the charging load and the idle consumption of the charger are avoided, the damage of the overcharge to the battery of the charging load is reduced, the service life of the battery is prolonged, and potential safety hazards such as explosion caused by the overcharge of the battery are eliminated. In addition, by using the charger and the control method thereof, the charging load equipment does not need to be additionally provided with an additional circuit.
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 specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of an embodiment of a charger provided in the present invention;
FIG. 2 is a schematic structural diagram of another embodiment of a charger according to the present invention;
fig. 3 is a schematic method diagram of a control method of a charger according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention provides a charger, which comprises a charging unit and a control unit. The charging unit is used for converting input alternating current into required first direct current so as to charge a charging load; the control unit is used for judging whether the electric quantity of the charging load is full according to the working frequency of the charging unit when the charging unit is charging the charging load so as to determine whether to continue charging the charging load. The control unit is further configured to determine whether an incompletely charged charging load is connected according to the voltage at the output end of the charging unit when the charging unit does not charge the charging load, and if so, control the charging unit to charge the connected incompletely charged charging load.
Fig. 1 is a schematic structural diagram of an embodiment of a charger provided in the present invention. As shown in fig. 1, the charger includes: a charging unit 1 and a control unit 2.
In one embodiment, the charging unit 1 may specifically include a switching power supply 11 for converting an input ac power into a desired first dc power; the required first direct current may specifically be a direct current with a first set voltage (a constant voltage required for charging the charging load) and a constant voltage. The operating frequency of the charging unit 1 specifically includes the operating frequency of the switching power supply 11, and the control unit 2 determines whether the charging load being charged is fully charged according to the operating frequency of the switching power supply 11, so as to determine whether to continue charging the charging load.
In another embodiment, the charging unit 1 includes: a rectifying and filtering circuit 12 and a switching power supply 11. The rectification filter circuit 12 is used for performing rectification filter processing on the input alternating current to obtain a second direct current; the switching power supply 11 is used for converting the second direct current into a required first direct current. That is, the alternating current input by the alternating current power supply is converted into the second direct current after being rectified and filtered by the rectifying and filtering circuit, and then is converted into the first direct current with constant voltage by the switching power supply 11 to be output so as to be supplied to the charging load for charging.
As shown in fig. 1, the control unit 1 may specifically include: a frequency detection unit 21, a charging control unit 22, and a voltage detection unit 23.
The frequency detection unit 21 is configured to detect an operating frequency of the switching power supply 11 when the charging unit 1 is charging a charging load; the charging control unit 22 is configured to determine whether the charging load is fully charged according to the operating frequency of the switching power supply 11 detected by the frequency detection unit 21, and control the charging unit 1 to continue charging the charging load when the charging load is not fully charged, or control the charging unit 1 to stop charging the charging load when the charging load is fully charged. The charging control unit 22 may be a smart chip.
Optionally, the charging control unit 22 is connected to an output end of the charging unit 1, so as to supply power to the charging control unit 22 through the charging unit 1; alternatively, the control unit 2 further includes: and a switching power supply 24 for obtaining a third direct current for supplying power to the charging control unit 22.
Preferably, the charger further comprises: and the control switch 3 is controlled, and the control unit 2 controls the charging unit 1 to charge the charging load or not by controlling the on or off of the control switch 3. That is, when the control switch 3 is controlled to be closed, the charging unit 1 charges a charging load; when the control switch 3 is controlled to be switched off, the circuit between the charging unit 1 and the charging load is switched off, and the charging of the charging load is stopped.
As shown in fig. 1, according to an embodiment of the present invention, when the control unit 2 includes a charging control unit 22, the charging control unit 22 is connected to an output terminal of the charging unit 1 to supply power to the charging control unit 22 through the charging unit 1; the control switch 3 is arranged between the output of the charging unit 1 and the charging load.
Fig. 2 is a schematic structural diagram of another embodiment of a charger provided by the present invention. According to another embodiment of the present invention, as shown in fig. 2, the control unit 2 further includes a switching power supply 24 for obtaining a third dc power for supplying the charging control unit 22; the required third direct current may specifically be a direct current with a second set voltage (a constant voltage required for supplying power to the charging control unit 22) and a constant voltage. The control switch 3 is disposed at an input end of the charging unit 1 (between an ac power supply and the charging unit 1), that is, at a front end of the switching power supply.
In the case where the charging unit 1 does not include the rectifying/smoothing circuit 12, the conversion power supply 24 is connected to an ac input power supply, and converts the ac power supplied from the ac power supply into the third dc power required by the charging control unit 22. The conversion power supply 24 may be a low power consumption switching power supply, and converts ac power of an ac power supply into third dc power with a constant voltage.
In the case that the charging unit 1 includes the rectifying and smoothing circuit 12, the conversion power supply 24 is connected to the rectifying and smoothing circuit 12, and converts the second direct current obtained after the rectifying and smoothing process into a third direct current required by the charging control unit 22. In this case, the conversion power supply 24 may be specifically a DC/DC conversion power supply, and converts the second direct current into a third direct current with a constant voltage.
Since a large power output is not required for the charging control of the charger, the charging control unit 22 can be supplied from the optional type or circuit by using a low power consumption power source, and thus the charging control unit 11 can be supplied by using a low power consumption DC/DC conversion power source. Meanwhile, the control switch 3 is arranged between the alternating current input power supply and the charging unit 1, and is arranged between the rectifying and filtering circuit 12 and the switching power supply 11 when the rectifying and filtering circuit 12 is included, namely, is arranged at the front end of the switching power supply 11, so that the control unit 1 can control the on or off of the alternating current input by the alternating current power supply from the front end of the switching power supply 11, and the charger has higher safety and reliability.
The charging control unit 22, which determines whether the charging load is fully charged according to the operating frequency of the switching power supply 11 detected by the frequency detection unit 21, specifically includes: judging whether the switching frequency of the switching power supply 11 detected by the frequency detection unit 21 is greater than a first predetermined frequency threshold; if the switching frequency of the switching power supply is less than or equal to the first predetermined frequency threshold, determining that the electric quantity of the charging load is full, or if the switching frequency of the switching power supply 11 is less than or equal to the first predetermined frequency threshold and lasts for a first predetermined time period, determining that the electric quantity of the charging load is full; if the switching frequency of the switching power supply 11 is greater than the first predetermined frequency threshold, it is determined that the charging load is not fully charged.
Specifically, when the battery capacity tends to be saturated, the output power requirement is not high, and the charger charging circuit switching power supply 11 operates in the light load mode, so that the operating frequency of the switching power supply 11 gradually decreases, where a first predetermined frequency threshold is set to be f0, and the operating frequency of the switching power supply 11 is detected to be f; when the charging unit 1 is charging the charging load, i.e. the control switch 3 has been turned on, the frequency detection unit 21 detects the operating frequency f of the switching power supply 11 in real time: when the detected working frequency f of the switching power supply is larger than f0, it is determined that the battery capacity of the charging load is not saturated and a charging requirement still exists, and the charging control unit 22 controls the control switch 3 to be normally switched on; when the working frequency f of the switching power supply 11 is detected to be less than or equal to f0, the battery of the charging load can be considered to be saturated; or, when the working frequency f of the switching power supply is detected to be less than or equal to f0 and f0 is detected to be less than or equal to f0 within the continuous time t, the charging control unit 22 controls the control switch 3 to be switched off, and the charger has no output.
Further, the control unit 2 is further configured to determine whether an incompletely charged charging load is connected according to the voltage at the output end of the charging unit 1 when the charging unit 1 does not charge the charging load, and if so, control the charging unit to charge the connected incompletely charged charging load. As shown in fig. 1 or fig. 2, the control unit 2 may further include a voltage detection unit 23.
The voltage detection unit 23 is configured to detect a voltage at an output terminal of the charging unit 1 when the charging unit 1 is not charging a charging load; the charging control unit 22 determines whether an incompletely charged charging load is connected according to the voltage of the output terminal detected by the voltage detection unit 23, and controls the charging unit 1 to charge the incompletely charged charging load when determining that the incompletely charged charging load is connected.
The charging control unit 22 determines whether an incompletely charged charging load is connected according to the voltage of the output terminal detected by the voltage detection unit 23, and specifically includes: judging whether the voltage of the output end detected by the voltage detection unit 23 is greater than a first preset voltage threshold and less than a second preset voltage threshold; if the voltage of the output end is greater than a first preset voltage threshold and smaller than a second preset voltage threshold, determining that an incompletely charged charging load is accessed; and if the voltage of the output end is less than or equal to a first preset voltage threshold value or greater than or equal to a second preset voltage threshold value, determining that no fully-charged charging load is connected.
Specifically, after the charger is connected to the ac power supply, the control unit 2 starts to operate, and at this time, the control switch 3 is in the off state, and when no charging load is connected, since the output terminal has no load, the voltage U at the output terminal of the charging unit 1 detected by the voltage detection unit 23 is substantially 0V; because the voltage of the battery of the charging load has a specific relation with the capacity thereof, when the charging capacity reaches saturation, the voltage of the battery approaches to a voltage value U1 (a second predetermined voltage threshold), and the lowest voltage value U0 (a first predetermined voltage threshold) after the battery is accessed; after a charging load (such as a mobile phone) is connected, because a battery of the charging load at an output end has a certain voltage value, when a detection voltage U meets the condition that U0 < U1, it indicates that a charging load which is not fully charged is connected, and the control switch 3 is controlled to be turned on, namely when the charging unit 1 does not charge the charging load (the control switch 3 is turned off), and U is not more than U0, the charging load is considered to be not connected; when U is larger than or equal to U1, the electric quantity of the charging load is considered to be saturated, and only when U0 is smaller than U and smaller than U1, the charging state is started to enter, and the control switch 3 is controlled to be closed.
The present invention also provides a control method for the charger described in any one of the above, including: when the charging unit is charging a charging load, judging whether the electric quantity of the charging load is full according to the working frequency of the charging unit so as to determine whether to continue charging the charging load.
Specifically, in a case where the charging unit 1 is charging a charging load, the operating frequency of the switching power supply 11 is detected; judging whether the electric quantity of the charging load is fully charged according to the detected working frequency of the switching power supply 11; and controlling the charging unit 1 to continue charging the charging load under the condition that the electric quantity of the charging load is not full, or controlling the charging unit 1 to stop charging the charging load under the condition that the electric quantity of the charging load is full. Specifically, the charger further includes a control switch 3, and whether the charging unit 1 charges a charging load can be controlled by controlling the on or off of the control switch 3. That is, when the control switch 3 is controlled to be closed, the charging unit 1 charges a charging load; when the control switch 3 is controlled to be switched off, the circuit between the charging unit 1 and the charging load is switched off, and the charging of the charging load is stopped.
Wherein, judging whether the electric quantity of the charging load is fully charged according to the detected working frequency of the switching power supply 11 specifically comprises: judging whether the detected switching frequency of the switching power supply 11 is greater than a first preset frequency threshold value; if the switching frequency of the switching power supply 11 is less than or equal to the first predetermined frequency threshold, determining that the electric quantity of the charging load is full, or if the switching frequency of the switching power supply is less than or equal to the first predetermined frequency threshold and lasts for a first predetermined time period, determining that the electric quantity of the charging load is full; and if the switching frequency of the switching power supply is greater than the first preset frequency threshold value, determining that the electric quantity of the charging load is not fully charged.
Further, the method further comprises: detecting the voltage of the output end of the charging unit when the charging unit 1 does not charge a charging load; and determining whether an incompletely charged charging load is connected according to the detected voltage of the output end of the charging unit, and if so, controlling the charging unit 1 to charge the connected incompletely charged charging load.
Specifically, when the charging unit 1 is not charging a charging load, the voltage of the output terminal of the charging unit 1 is detected; determining whether an under-charged charging load is connected according to the detected voltage of the output end; and when the charging unit determines that the charging load is not fully charged, controlling the charging unit to charge the charging load not fully charged. Specifically, the charger further includes: the control switch 3 can control whether the charging unit 1 charges the charging load by controlling the on or off of the control switch 3.
Determining whether an incompletely charged charging load is connected according to the detected voltage of the output end of the charging unit, specifically comprising: judging whether the detected voltage of the output end is larger than a first preset voltage threshold and smaller than a second preset voltage threshold; if the voltage of the output end is greater than a first preset voltage threshold and smaller than a second preset voltage threshold, determining that an incompletely charged charging load is accessed; and if the voltage of the output end is less than or equal to a first preset voltage threshold (no charging load is connected) or greater than or equal to a second preset voltage threshold (charging load is connected and is fully charged), determining that no fully-charged charging load is connected.
For clearly illustrating the technical solution of the present invention, the following describes an execution flow of the control method of the charger according to an embodiment of the present invention.
Fig. 3 is a schematic method diagram of a control method of a charger according to an embodiment of the present invention. The embodiment shown in fig. 3 includes steps S101 to S110.
Step S101, after the charger is powered on, it is determined whether the control switch 3 is turned on, if the control switch is not turned on, step S102 is executed, and if the control switch is turned on, step S104 is executed.
And S102, detecting whether the output end voltage U meets the condition that U is more than U0 and less than U1, if so, executing the step S103, otherwise, returning to execute the step S101 again.
And step S103, if the condition that U0 is more than U and less than U1 is detected, controlling the control switch to be conducted.
In step S104, if the control switch is turned on, the operating frequency f of the switching power supply is detected, and step S105 is executed.
Step S105, determining whether the detected operating frequency f satisfies f > f0, if yes, executing step S106, and if no, executing step S108.
And step S106, if the detected working frequency of the switching power supply meets f & gt f0, clearing the time delay, and executing step S107.
And step S107, if the detected working frequency of the switching power supply meets f & gtf 0, controlling the control switch to be kept on, returning to the step S101, and re-executing the process.
And step S108, if the detected working frequency of the switching power supply does not meet f & gt f0, starting to calculate the time delay.
Step S109, determining whether the delay time reaches the first predetermined time t, if not, executing step S107, continuing to turn on the control switch, and if so, executing step S110.
And step S110, when the time delay reaches the first preset time t, the control switch is turned off, the step S101 is returned, and the process is executed again.
The charger and the control method thereof provided by the invention are suitable for mobile terminals using lithium batteries as storage batteries, including but not limited to mobile phones, tablet computers, music players, PDAs and other terminal devices.
Therefore, according to the scheme provided by the invention, whether the electric quantity of the charging load is fully charged is judged by detecting the working frequency of the switching power supply, and the charger can automatically disconnect the charging load after detecting that the electric quantity of the charging load is fully charged, so that the overcharge of the battery of the charging load and the idle consumption of the charger are avoided, the damage of the overcharge to the battery of the charging load is reduced, the service life of the battery is prolonged, and potential safety hazards such as explosion caused by the overcharge of the battery are eliminated. In addition, by using the charger and the control method thereof, the charging load equipment does not need to be additionally provided with an additional circuit.
The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the invention and the following claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or a combination of any of these. In addition, each functional unit may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and the parts serving as the control device may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (16)
1. A charger, comprising:
the charging unit is used for converting input alternating current into required first direct current so as to charge a charging load;
the control unit is used for judging whether the electric quantity of the charging load is full according to the working frequency of the charging unit when the charging unit is charging the charging load so as to determine whether to continue charging the charging load;
the control unit is further configured to:
when the charging unit does not charge the charging load, determining whether an incompletely charged charging load is accessed according to the voltage of the output end of the charging unit, and if so, controlling the charging unit to charge the accessed incompletely charged charging load;
the control unit includes:
the voltage detection unit is used for detecting the voltage of the output end of the charging unit when the charging unit does not charge the charging load;
the charging control unit is used for determining whether an incompletely charged charging load is connected according to the voltage of the output end detected by the voltage detection unit, and controlling the charging unit to charge the incompletely charged charging load when the incompletely charged charging load is determined to be connected;
determining whether an incompletely charged charging load is connected according to the voltage of the output end detected by the voltage detection unit, comprising: judging whether the voltage of the output end detected by the voltage detection unit is greater than a first preset voltage threshold and smaller than a second preset voltage threshold; if the voltage of the output end is greater than a first preset voltage threshold and smaller than a second preset voltage threshold, determining that an incompletely charged charging load is accessed; and if the voltage of the output end is less than or equal to a first preset voltage threshold value or greater than or equal to a second preset voltage threshold value, determining that no fully-charged charging load is connected.
2. The charger according to claim 1, wherein the charging unit comprises:
the switching power supply is used for converting an alternating current input power supply into a required first direct current voltage; the operating frequency of the charging unit includes an operating frequency of the switching power supply.
3. The charger according to claim 1, wherein the charging unit further comprises:
the rectification filter circuit is used for carrying out rectification filter processing on the input alternating current to obtain second direct current;
and the switching power supply is used for converting the second direct current into the required first direct current.
4. The charger according to claim 2 or 3, wherein the control unit comprises:
a frequency detection unit for detecting an operating frequency of the switching power supply when the charging unit is charging a charging load;
and the charging control unit is used for judging whether the electric quantity of the charging load is full according to the working frequency of the switching power supply detected by the frequency detection unit, and controlling the charging unit to continue charging the charging load under the condition that the electric quantity of the charging load is not full, or controlling the charging unit to stop charging the charging load under the condition that the electric quantity of the charging load is full.
5. The charger according to claim 4, wherein the charging control unit determines whether the charging load has been fully charged according to the operating frequency of the switching power supply detected by the frequency detection unit, and includes:
judging whether the switching frequency of the switching power supply detected by the frequency detection unit is greater than a first preset frequency threshold value;
if the switching frequency of the switching power supply is less than or equal to the first preset frequency threshold, determining that the electric quantity of the charging load is full, or if the switching frequency of the switching power supply is less than or equal to the first preset frequency threshold and lasts for a first preset time, determining that the electric quantity of the charging load is full;
and if the switching frequency of the switching power supply is greater than the first preset frequency threshold value, determining that the electric quantity of the charging load is not fully charged.
6. The charger according to claim 4,
the charging control unit is connected with the output end of the charging unit so as to supply power to the charging control unit through the charging unit;
or,
the control unit further includes: and the conversion power supply is used for obtaining a third direct current for supplying power to the charging control unit.
7. The charger of claim 5,
the charging control unit is connected with the output end of the charging unit so as to supply power to the charging control unit through the charging unit;
or,
the control unit further includes: and the conversion power supply is used for obtaining a third direct current for supplying power to the charging control unit.
8. The charger according to any one of claims 1 to 3 and 5 to 7, further comprising: and the control unit controls whether the charging unit charges the charging load or not by controlling the on/off of the control switch.
9. The charger of claim 4, further comprising: and the control unit controls whether the charging unit charges the charging load or not by controlling the on/off of the control switch.
10. The charger according to claim 8, wherein, in a case where the control unit includes a charging control unit,
when the charging control unit is connected with the output end of the charging unit, the control switch is arranged between the output end of the charging unit and a charging load;
or,
when the control unit further comprises a switching power supply, the control switch is arranged at the input end of the charging unit.
11. The charger according to claim 9, wherein, in a case where the control unit includes a charging control unit,
when the charging control unit is connected with the output end of the charging unit, the control switch is arranged between the output end of the charging unit and a charging load;
or,
when the control unit further comprises a switching power supply, the control switch is arranged at the input end of the charging unit.
12. A control method for the charger according to any one of claims 1 to 11, comprising:
when the charging unit is charging a charging load, judging whether the electric quantity of the charging load is full according to the working frequency of the charging unit so as to determine whether to continue charging the charging load.
13. The control method of claim 12, wherein determining whether the charging load is fully charged according to the operating frequency of the charging unit to determine whether to continue charging the charging load when the charging unit comprises a switching power supply comprises:
detecting the working frequency of the switching power supply under the condition that the charging unit is charging a charging load;
judging whether the electric quantity of the charging load is full according to the detected working frequency of the switching power supply;
and controlling the charging unit to continue to charge the charging load under the condition that the electric quantity of the charging load is not full, or controlling the charging unit to stop charging the charging load under the condition that the electric quantity of the charging load is full.
14. The control method according to claim 13, wherein determining whether the charging load is fully charged according to the detected operating frequency of the switching power supply comprises:
judging whether the detected switching frequency of the switching power supply is greater than a first preset frequency threshold value;
if the switching frequency of the switching power supply is less than or equal to the first preset frequency threshold, determining that the electric quantity of the charging load is full, or if the switching frequency of the switching power supply is less than or equal to the first preset frequency threshold and lasts for a first preset time, determining that the electric quantity of the charging load is full;
and if the switching frequency of the switching power supply is greater than the first preset frequency threshold value, determining that the electric quantity of the charging load is not fully charged.
15. The control method according to any one of claims 12 to 14, characterized by further comprising:
detecting the voltage of the output end of the charging unit when the charging unit does not charge a charging load;
and determining whether an incompletely charged charging load is connected according to the detected voltage of the output end, and if so, controlling the charging unit to charge the connected incompletely charged charging load.
16. The method of claim 15, wherein determining whether an under-charged charging load is engaged based on the voltage at the output of the charging unit comprises:
judging whether the detected voltage of the output end is larger than a first preset voltage threshold and smaller than a second preset voltage threshold;
if the voltage of the output end is greater than a first preset voltage threshold and smaller than a second preset voltage threshold, determining that an incompletely charged charging load is accessed;
and if the voltage of the output end is less than or equal to a first preset voltage threshold value or greater than or equal to a second preset voltage threshold value, determining that no fully-charged charging load is connected.
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| CN201711194151.5A CN107968472B (en) | 2017-11-24 | 2017-11-24 | Charger and control method thereof |
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| CN201711194151.5A CN107968472B (en) | 2017-11-24 | 2017-11-24 | Charger and control method thereof |
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| JP5714850B2 (en) * | 2010-08-12 | 2015-05-07 | Fdk株式会社 | Battery charging device and charging method |
| US9112371B2 (en) * | 2012-09-03 | 2015-08-18 | Shin-Kobe Electric Machinery Co., Ltd. | Refresh charging method for an assembled battery constituted from a plurality of lead-acid storage batteries and charging apparatus |
| CN103825336A (en) * | 2014-03-10 | 2014-05-28 | 上海锐奇工具股份有限公司 | Charging method for battery packs |
| CN105990859B (en) * | 2015-01-29 | 2019-02-12 | 惠州志顺电子实业有限公司 | The battery charger and method of detectable battery access state |
| CN107290676B (en) * | 2017-06-26 | 2023-05-02 | 广东电网有限责任公司珠海供电局 | Method and device for detecting fusing and open circuit of main fuse of storage battery pack |
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