CN114123381A - Voltage control method, circuit and device of charging device - Google Patents
Voltage control method, circuit and device of charging device Download PDFInfo
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- CN114123381A CN114123381A CN202111235134.8A CN202111235134A CN114123381A CN 114123381 A CN114123381 A CN 114123381A CN 202111235134 A CN202111235134 A CN 202111235134A CN 114123381 A CN114123381 A CN 114123381A
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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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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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
- H02J7/00308—Overvoltage protection
Abstract
The application discloses a voltage control method, a circuit and a device of a charging device, and belongs to the field of charging. The method comprises the following steps: during the charging process of the charging device, the charging device detects the current first output voltage and the current first input voltage of the charging device; the charging device controls the first input voltage to be input into a bleeder circuit in the charging device, starts the bleeder circuit and closes a charging circuit in the charging device when detecting that the first output voltage and the first input voltage meet a first condition; the charging device outputs a second output voltage obtained after voltage reduction processing is carried out on the charging device through the bleeder circuit.
Description
Technical Field
The application belongs to the field of charging, and particularly relates to a voltage control method, a voltage control circuit and a voltage control device of a charging device.
Background
With the development of charging technology, the charging time of the rechargeable battery is continuously shortened, and the load-bearing voltage is larger and larger.
Due to the continuous update of battery technology, in the related art, a situation of superimposed voltage ripple is likely to occur during the process of charging the battery, so that the input voltage reaches the peak value that the related device of the rechargeable battery can bear. Therefore, in the process of increasing voltage, the index requirement for the withstand voltage value of the relevant device of the rechargeable battery is also increasing.
Therefore, the voltage in the power supply process may reach the peak value that the related device of the rechargeable battery can bear continuously in the unit time, so that the rechargeable battery is easy to damage, and the service life is greatly shortened.
Disclosure of Invention
The embodiment of the application aims to provide a voltage control method, a circuit and a device of a charging device, which can solve the problems that in the power supply process, the voltage can continuously reach the peak value which can be borne by related devices of a rechargeable battery in unit time, so that the rechargeable battery is easy to damage, and the service life is shortened.
In a first aspect, an embodiment of the present application provides a method for controlling a voltage of a charging device, where the method includes: the charging device detects a current first output voltage and a current first input voltage of the charging device in the charging process of the charging device; the charging device controls the first input voltage to be input into a bleeder circuit in the charging device, starts the bleeder circuit and closes a charging circuit in the charging device when detecting that the first output voltage and the first input voltage meet a first condition; the charging device outputs a second output voltage obtained after voltage reduction processing is carried out on the charging device through the bleeder circuit.
In a second aspect, an embodiment of the present application provides a voltage control apparatus for a charging device, where the apparatus includes: the detection module comprises a detection module execution module and an output module; the detection module is used for detecting a current first output voltage and a current first input voltage of the charging device in the charging process of the charging device; the execution module is configured to control a leakage circuit, which is used to input the first input voltage to the charging device, to start the leakage circuit, and to shut down a charging circuit in the charging device, when the detection module detects that the first output voltage and the first input voltage satisfy a first condition; the output module is configured to output a second output voltage obtained after the voltage reduction processing is performed by the bleeder circuit:
in a third aspect, an embodiment of the present application provides a voltage control circuit of a charging device, where the voltage control circuit includes: the processor and the bleeding module are connected with the processor; the processor is used for detecting a first output voltage output by the current output end of the charging device and a first input voltage input by the input end in the charging process of the charging device; the processor is further configured to control the first input voltage to be input to the bleeding circuit and start the bleeding circuit when it is detected that the first output voltage and the first input voltage satisfy a first condition; a bleeder circuit for performing a voltage reduction process on the first input voltage; the output end is connected with the bleeder circuit and used for outputting a second output voltage obtained after voltage reduction treatment is carried out on the bleeder circuit.
In a fourth aspect, an embodiment of the present application provides a charging device, where the charging device includes the circuit described in the third aspect.
In this embodiment, in the charging process of the charging device, the charging device may detect a current first output voltage and a current first input voltage of the charging device in advance, and when it is detected that the first output voltage and the first input voltage satisfy a first condition, the charging device controls the first input voltage to be input to a discharging circuit in the charging device, starts the discharging circuit, closes a charging circuit in the charging device, and finally outputs a second output voltage obtained by performing voltage reduction processing by the discharging circuit. So, through set up bleeder circuit in the charging device, in time adopt bleeder circuit to discharge and then step down when output voltage is too high for final output voltage's voltage value is for bearing the voltage value in the scope at relevant device conventionality, can protect relevant device from this well, and make rechargeable battery hardware selection range not restricted, and then reduced components and parts use cost when having improved the matching flexibility ratio.
Drawings
Fig. 1 is a first schematic circuit diagram of a voltage control circuit of a charging device according to an embodiment of the present disclosure;
fig. 2 is a second schematic circuit diagram of a voltage control circuit of a charging device according to an embodiment of the present disclosure;
fig. 3 is a third schematic circuit diagram of a voltage control circuit of a charging device according to an embodiment of the present disclosure;
fig. 4 is a schematic flowchart of a voltage control circuit of a charging device according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a voltage control apparatus of a charging device according to an embodiment of the present disclosure.
Detailed Description
Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present disclosure.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced otherwise than as shown or described herein and the terms "first," "second," and the like are used generically and do not limit the number of terms to which they may be applied, e.g., the first term may refer to one or more than one term. Further, in the specification and claims, "and/or" means at least one of the connected objects, the character "/" generally means a relationship that preceding and succeeding associated objects are an "or".
The voltage control method of the charging device according to the embodiments of the present application is described in detail with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
For the charging device, in order to shorten the charging time and upgrade the battery core system, the voltage when the battery core is in the full charge state is also increased. In the process of increasing voltage, the requirement on the withstand voltage value of the related device of the rechargeable battery is also increased, and therefore, the withstand voltage values of the rechargeable battery and the related device of the rechargeable battery become important factors influencing the charging capability of the rechargeable battery. When the rechargeable battery and the rechargeable battery related device are in an overvoltage state for a long time (for example, when the input voltage reaches the peak voltage, a phenomenon of superimposed voltage ripples occurs), the following two problems easily occur: 1. the service life of related devices is easily shortened greatly, and the rechargeable battery is easy to permanently lose efficacy; 2. in order to avoid damage of the rechargeable battery, in the related art, a new device with a higher withstand voltage value is selected to replace an original device, but on one hand, the number of selectable devices is small, some rechargeable batteries cannot be matched with the new device, and on the other hand, even if other devices can be successfully matched with the new device, the problem of cost increase is also brought.
In this embodiment, in the charging process of the charging device, the charging device may detect a current first output voltage and a current first input voltage of the charging device in advance, and when it is detected that the first output voltage and the first input voltage satisfy a first condition, the charging device controls the first input voltage to be input to a discharging circuit in the charging device, starts the discharging circuit, closes a charging circuit in the charging device, and finally outputs a second output voltage obtained by performing voltage reduction processing by the discharging circuit. So, through set up bleeder circuit in the charging device, in time adopt bleeder circuit to discharge and then step down when output voltage is too high for final output voltage's voltage value is for bearing the voltage value in the scope at relevant device conventionality, can protect relevant device from this well, and make rechargeable battery hardware selection range not restricted, and then reduced components and parts use cost when having improved the matching flexibility ratio.
The present embodiment also provides a voltage control circuit of a charging device, as shown in fig. 1, the voltage control circuit 400 of the charging device includes the following processor 401 and a bleeding circuit 402 connected to the processor.
The processor 401 is configured to detect a first output voltage output from an output terminal of the charging device and a first input voltage input from an input terminal of the charging device during a charging process of the charging device.
The processor 401 is further configured to control the first input voltage to be input to the bleeding circuit and start the bleeding circuit when it is detected that the first output voltage and the first input voltage satisfy a first condition.
And a bleeder circuit 402 for performing a voltage reduction process on the first input voltage.
In this embodiment, the output terminal a is connected to the bleeder circuit 402, and is configured to output a second output voltage obtained by performing voltage reduction processing by the bleeder circuit.
In the embodiment of the present application, the charging device may be a rechargeable battery, and may be a power management unit and/or a fast charging chip connected to the rechargeable battery.
In this embodiment, the input terminal may be a terminal for receiving an input voltage of a charger after the charging device is connected to the charger.
For example, the first input voltage of the input terminal may be a voltage output by the charger.
In an embodiment of the present application, the first input voltage and the first output voltage are voltages processed by a voltage control circuit of an uncharged device.
In this embodiment, the output terminal corresponding to the first input voltage refers to an output terminal that does not include a bleeder circuit.
It will be appreciated that the bleeding circuit may be a different circuit to the charging circuit, in the conventional case the circuit to which the output voltage corresponds being the charging circuit.
In the embodiment of the present application, the charging device may be provided with a voltage comparator in the vicinity of the input terminal and in the vicinity of the output terminal, respectively, and the voltage comparator is configured to detect a voltage value of the input terminal and a voltage value of the output terminal.
Further, after detecting the voltage value of the input terminal and the voltage value of the output terminal, the voltage comparator outputs a voltage signal corresponding to the detected voltage value of the input terminal and a voltage signal corresponding to the detected voltage value of the output terminal. The voltage signal may include a high level voltage signal and a low level voltage signal.
Optionally, in an embodiment of the present application, the first condition includes: the first input voltage is greater than or equal to a first predetermined threshold, and the first output voltage is greater than or equal to a second predetermined threshold.
For example, the first predetermined threshold may be preset for the charging device, or may be set by the user. Similarly, the second predetermined threshold may be preset for the charging device, or may be set by a user.
For example, in the case that the first input voltage is greater than or equal to the first predetermined threshold, the voltage signal corresponding to the first input voltage is at a high level, and in the case that the first output voltage is greater than or equal to the first predetermined threshold, the voltage signal corresponding to the first input voltage is at a high level; under the condition that the first input voltage is smaller than a first preset threshold value, a voltage signal corresponding to the first input voltage is at a low level; and under the condition that the first output voltage is smaller than a first preset threshold value, a voltage signal corresponding to the first output voltage is at a low level.
Further, when the voltage signal corresponding to the first input voltage and the voltage signal corresponding to the first output voltage are both at a high level, the bleeder circuit for inputting the first input voltage to the charging device is controlled.
In this embodiment, the charging circuit is used for conducting power when the charging device is in a normal voltage range, and after the first input voltage passes through the charging circuit, the charging circuit does not adjust the first input voltage and outputs the first input voltage normally.
In this embodiment, the bleeder circuit is a circuit for conducting power when the charging device is in a range exceeding a normal voltage, and after the first input voltage passes through the bleeder circuit, the bleeder circuit can adjust the first input voltage through a discharge mechanism, reduce a voltage value of the first input voltage, and output a second output voltage.
In the embodiment of the present application, the second output voltage is in a predetermined threshold range. The predetermined threshold range may be preset for the electronic device or may be set by a user in a self-defined manner, which is not limited in the embodiment of the present application.
It can be understood that an application scenario of the embodiment of the present application may be in a process of charging a charging device by a charger, where the charging device may be a rechargeable battery or other devices, and an application scenario of the bleeding circuit in the present application may be flexibly switched, which is not limited in the embodiment of the present application.
In the charging electrical appliance provided by the embodiment of the application, in the charging process of the charging device, the charging device may detect a current first output voltage and a current first input voltage of the charging device in advance, and when it is detected that the first output voltage and the first input voltage meet a first condition, the charging electrical appliance controls the first input voltage to be input to a bleeder circuit in the charging device, starts the bleeder circuit, closes a charging circuit in the charging device, and finally outputs a second output voltage obtained by performing voltage reduction processing through the bleeder circuit. So, through set up bleeder circuit in charging device, in time adopt bleeder circuit to discharge and then step down when output voltage is too high for final output voltage's voltage value is for bearing the voltage value in the scope at relevant device conventionality, can protect relevant device from this well, and make rechargeable battery hardware selection range not restricted, and then reduced components and parts use cost when having improved the matching flexibility ratio.
Optionally, in this embodiment of the present application, the voltage control circuit 400 further includes: a switch module 403 connected to the bleeding circuit 402 and the charging circuit, respectively:
the processor 401 is specifically configured to, when detecting that the first output voltage and the first input voltage satisfy a first condition, control the switch module 403 to turn on a path between an input terminal and the bleeder circuit, and turn off a path between the input terminal and the charging circuit 400, so as to control the first input voltage to be input to the bleeder circuit, start the bleeder circuit, and turn off the charging circuit in the charging device.
For example, after the charging electrical appliance inputs the first input voltage to the bleeder circuit, the charging circuit in the charging device is turned off while the bleeder circuit is turned on.
It can be understood that, the charging apparatus may only select to enable one of the charging circuit and the discharging circuit to be in an on state at the same time, that is, if the discharging circuit is in an on state, the charging circuit in the charging device is turned off, and if the discharging circuit is in an off state, the charging circuit in the charging device is turned on.
Optionally, in this embodiment of the present application, the switch module 403 includes: and a not circuit 403A, a first determination information being information that the first input voltage and the first output voltage determined by the processor 401 satisfy a first condition, and a second determination information being information that the first input voltage and the first output voltage determined by the processor 401 do not satisfy the first condition.
The and circuit 403A is configured to turn on the bleeding circuit when receiving the second determination information.
The and circuit 403A is configured to turn off the bleeding circuit when the second determination information is received.
The not circuit 403B is configured to turn off the charging circuit when the first determination information is received.
The not circuit 403B is further configured to turn on a charging circuit when the second determination information is received.
Illustratively, the and circuit 403A is connected to a voltage comparator for measuring the input voltage and for measuring the output voltage, and to a bleeding circuit and a charging circuit.
Illustratively, the and circuit 403A is configured to determine the logic level output by the and circuit 403A according to the voltage signals output by the voltage comparator for measuring the input voltage and the voltage comparator for measuring the output voltage.
Further, when the voltage signal measured by the voltage comparator for measuring the input voltage is a high level signal and the voltage signal measured by the voltage comparator for measuring the output voltage is a high level signal, the and circuit 403A outputs the high level signal. Otherwise, the and circuit 403A will output a low level signal.
For example, the not gate circuit 403B is connected to the gate circuit 403A and the charging circuit.
Further, the not gate circuit 403B may control to turn on the not gate circuit 403B or turn off the not gate circuit 403B according to the logic level output by the and gate circuit 403A. The not circuit 403B is turned on when the logic level output from the and circuit 403A is high, and the not circuit 403B is turned off when the logic level output from the and circuit 403A is high.
Further, when the not gate circuit 403B is turned on, the charging circuit is turned on, and the discharging circuit is turned off; when the not gate circuit 403B is turned off, the charging circuit is turned off and the bleeding circuit is turned on.
So, through AND gate circuit and NOT gate circuit, can control opening and closing of bleeder circuit to under the condition that first input voltage satisfies first condition, in time open bleeder circuit, step down.
Illustratively, the bleeding circuit 402 includes any one of: a first sub-circuit formed by the field effect transistor MOS module 41 and the diode 42, and a second sub-circuit formed by the DCDC module 43.
In an example, in the case where the bleeder circuit 402 includes the first sub-circuit composed of the field effect transistor MOS module and the diode, as shown in fig. 2, the voltage comparator 1 may detect the voltage value of the first input voltage at the input terminal, and the voltage comparator 2 may detect the voltage value of the first input voltage at the output terminal. Assuming that the first predetermined threshold and the second predetermined threshold are 4.2V, when the voltage (the first input voltage) at the measurement input end of the voltage comparator 1 is greater than 4.2V and the voltage (the first output voltage) at the measurement output end of the voltage comparator 2 is also greater than 4.2V, the voltage signal corresponding to the voltage comparator 1 is at a high level and the voltage signal corresponding to the voltage comparator 2 is also at a high level, at this time, the logic level output by the and circuit 403A is at a high level, the not circuit 403B turns on the not gate circuit after receiving the high level of the and circuit 403A, turns off the charging circuit, that is, the field effect module 40 in fig. 2, turns on the bleeder circuit composed of the field effect module 41 and the diode 42, steps down the input voltage through the bleeder circuit, and finally outputs the stepped-down voltage (the second output voltage).
In an example, in the case that the bleeder circuit 402 includes the second sub-circuit formed by the DCDC module 43, as shown in fig. 3, the voltage comparator 1 may detect the voltage value of the first input voltage at the input terminal, and the voltage comparator 2 may detect the voltage value of the first input voltage at the output terminal. Assuming that the first predetermined threshold and the second predetermined threshold are 4.2V, when the voltage (the first input voltage) at the measurement input end of the voltage comparator 1 is greater than 4.2V and the voltage (the first output voltage) at the measurement output end of the voltage comparator 2 is also greater than 4.2V, the voltage signal corresponding to the voltage comparator 1 is at a high level, the voltage signal corresponding to the voltage comparator 2 is also at a high level, at this time, the logic level output by the and circuit 403A is at a high level, the not circuit 403B turns on the not circuit 403B after receiving the high level of the and circuit 403A, turns off the charging circuit, that is, the bleeding circuit formed by the DCDC module 43 in fig. 3, steps down the input voltage by the bleeding circuit, and finally outputs the stepped-down voltage (the second output voltage).
Therefore, the bleeder circuit can be started to reduce the voltage under the condition that the input voltage and the output voltage accord with the first condition through the bleeder circuit consisting of the AND gate circuit, the NOT gate circuit and different devices, so that the device finally closed on the charging power supply receives the voltage within the preset bearing range.
Optionally, in this embodiment of the application, the processor 401 is further configured to control the switch module 403 to turn on a path between the input terminal and the charging circuit and turn off a circuit between the switch module conduction input terminal and the bleeding circuit when the first input voltage satisfies a second condition.
The processor 401 is further configured to output the first output voltage.
For example, the second condition may include: the first output voltage is less than a second predetermined threshold.
For example, according to the above, the controlling the switch module 403 to turn on the path between the input terminal and the charging circuit 400, and the turning off the circuit between the switch module turn-on input terminal and the bleeding circuit 402 may be: the logic level corresponding to the and circuit 403A is low, and the not circuit 403B is turned off, thereby turning on the charging circuit and turning off the bleeding circuit.
In an example, as shown in fig. 2, the turning on the charging circuit and the turning off the bleeding circuit may be: and (3) switching on the field effect module 40, and switching off a bleeder circuit consisting of the field effect module 41 and the diode 42.
In an example, as shown in fig. 3, the turning on the charging circuit and the turning off the bleeding circuit may be: the field effect module 40 is turned on and the bleeder circuit formed by the DCDC module 43 is turned off.
The present embodiment provides a voltage control method of a charging device, which includes, as shown in fig. 4, the following steps 501 to 503:
step 501: during the charging process of the charging device, the charging device detects the current first output voltage and the first input voltage of the charging device.
Step 502: the charging device controls the first input voltage to be input to a bleeder circuit in the charging device, starts the bleeder circuit, and closes a charging circuit in the charging device when detecting that the first output voltage and the first input voltage satisfy a first condition.
Step 503: the charging device outputs a second output voltage obtained after voltage reduction processing is carried out on the charging device through the bleeder circuit.
Optionally, in an embodiment of the present application, the first condition includes: the first input voltage is greater than or equal to a first predetermined threshold, and the first output voltage is greater than or equal to a second predetermined threshold.
In the embodiment of the present application, the first output voltage, the first input voltage, the charging circuit, and the bleeding circuit may refer to the foregoing contents, which are not limited in the embodiment of the present application.
In the charging process of the charging device, the charging device may detect a current first output voltage and a current first input voltage of the charging device in advance, and when it is detected that the first output voltage and the first input voltage satisfy a first condition, the charging device may control the first input voltage to be input to a bleed-off circuit in the charging device, start the bleed-off circuit, close the charging circuit in the charging device, and finally output a second output voltage obtained by performing voltage reduction processing by the bleed-off circuit. So, through set up bleeder circuit in charging device, in time adopt bleeder circuit to discharge and then step down when output voltage is too high for final output voltage's magnitude of voltage is for bearing the within range magnitude of voltage at relevant device conventionality, can protect relevant device from this well, and make rechargeable battery hardware select range not restricted, and then reduced components and parts use cost when having improved the matching flexibility ratio.
Optionally, in this embodiment of the application, after the bleeder circuit is started in the step 503, the method for controlling the voltage of the charging device according to this embodiment of the application further includes the following steps 504 and 505:
step 504: and the charging device controls the first input voltage to be input into a charging circuit in the charging device, closes the bleeder circuit and opens the charging circuit when the first input voltage meets a second condition.
Step 505: the charging device outputs the first output voltage.
Therefore, the circuit is discharged by the bleeder circuit, and then after voltage reduction is completed, the bleeder circuit can be closed, and the charging circuit is switched on, so that the charging efficiency can be ensured under the condition of ensuring charging safety.
It should be noted that, in the voltage control method of the charging device provided in the embodiment of the present application, the execution main body may be a voltage control apparatus of the charging device, or a control module in the voltage control apparatus of the charging device, for executing the voltage control method of the charging device. In the embodiment of the present application, a voltage control apparatus of a charging device provided in the embodiment of the present application will be described by taking as an example a method in which a voltage control apparatus of a charging device executes a voltage control of a charging device.
In an embodiment of the present application, a bleeder device is provided, where the bleeder device includes a processor, a bleeder circuit, a charging circuit, and a switch module for controlling the opening and closing of the bleeder circuit and the charging circuit; the processor is configured to detect a first level corresponding to a first output voltage output by an output terminal of the charging device and a second level corresponding to a first input voltage input by an input terminal of the charging device during a charging process of the charging device; the switch module is configured to turn off the charging circuit and turn on the bleeding circuit when it is detected that the first level and the second level satisfy a first relationship; the bleeder circuit is used for performing voltage reduction processing on a first input voltage input into the bleeder circuit after the switch module starts the bleeder circuit.
In the bleeder device provided in the embodiment of the present application, in a charging process of the charging device, the charging device may detect a current first output voltage and a current first input voltage of the charging device in advance, and when it is detected that the first output voltage and the first input voltage satisfy a first condition, the charging device controls the first input voltage to be input to a bleeder circuit in the charging device, starts the bleeder circuit, closes a charging circuit in the charging device, and finally outputs a second output voltage obtained by performing voltage reduction processing by the bleeder circuit. So, through set up bleeder circuit in charging device, in time adopt bleeder circuit to discharge and then step down when output voltage is too high for final output voltage's voltage value is for bearing the voltage value in the scope at relevant device conventionality, can protect relevant device from this well, and make rechargeable battery hardware selection range not restricted, and then reduced components and parts use cost when having improved the matching flexibility ratio.
Optionally, in an embodiment of the present application, the processor includes: a first voltage comparator and the second voltage comparator; the first voltage comparator is configured to detect a first output voltage output from the output terminal of the charging device and output the first level, and the second voltage comparator is configured to detect a first input voltage input from the input terminal and output the second level.
For example, the first level may be obtained by measuring a voltage by a first voltage comparator of the bleeder device, wherein the voltage comparator may be located at a final voltage output of the bleeder device. In particular, reference may be made to the position of the voltage comparator 2 in fig. 2 and 3.
In an example, the first voltage comparator corresponding to the first level may obtain the voltage amplitude through a voltage dividing module composed of a resistor device, so as to obtain the first level corresponding to the first voltage comparator. Specifically, in fig. 2 and 3, the voltage dividing module corresponds to the connection between the resistor R1 and the resistor R2, and the connection between the voltage dividing module and the first voltage comparator (voltage comparator 2) can also refer to the connection between the voltage dividing module and the voltage comparator 2 in fig. 2 and 3.
It can be understood that the voltage dividing module can be used as a feedback loop to detect the voltage amplitude of the output voltage at the final voltage output terminal.
For example, the second level may also be obtained by measuring a voltage by a second voltage comparator of the bleeder device, wherein the second voltage comparator may be located at a voltage initial input terminal of the bleeder device. In particular, reference may be made to the positions of the voltage comparators 1 in fig. 2 and 3.
Illustratively, the second voltage comparator is located at a front end of the switch module, and the first voltage comparator is located at a rear end of the bleeder circuit.
Further, the second voltage comparator is connected to the switch module, and the first voltage comparator is connected to the switch module and the discharging circuit. Specifically, reference may be made to the positions of the voltage comparator 1 (second voltage comparator) and the voltage comparator 2 (first voltage comparator) in the overall circuit in fig. 2 and 3.
Optionally, in an embodiment of the present application, the bleeding circuit includes any one of: the first sub-circuit is composed of a field effect transistor MOS module and a diode, and the second sub-circuit is composed of a DCDC module.
For example, the specific composition and connection manner of the bleeding circuit may refer to the foregoing, and details are not described herein.
Optionally, in an embodiment of the present application, the switch module includes: an AND gate circuit and a NOT gate circuit; the AND circuit is connected to the first voltage comparator, and the NOT circuit is connected to the AND circuit, the charging circuit, and the bleeding circuit; the AND circuit outputs a target level according to the first level and the second level, and the NOT circuit controls the conduction states of the charging circuit and the discharging circuit according to the target level; when the target level is high level, the bleeder circuit is opened, and the charging circuit is closed; and turning on the charging circuit and turning off the discharging circuit when the target level is low level.
For example, the switch module is located at the front end of the bleeding circuit, and the switch module may be used to control the switching and the switching of the bleeding circuit and the charging circuit. Specifically, reference may be made to the connection relationship between the bleeder circuit (which may be a parallel circuit between the field effect module 40 and the field effect module 41, or a parallel circuit between the field effect module 40 and the DCDC module 43) and the switch module (which is composed of the and circuit 403A and the not circuit 403B) in fig. 2 and 3.
Fig. 5 is a schematic diagram of a possible structure of a voltage control apparatus for implementing a charging device according to an embodiment of the present disclosure. As shown in fig. 5, the voltage control apparatus 600 of the charging device includes: a detection module 601, an execution module 602 and an output module 603; the detecting module 601 is configured to detect a current first output voltage and a current first input voltage of the charging device during a charging process of the charging device; the executing module 602 is configured to, when the detecting module 601 detects that the first output voltage and the first input voltage satisfy a first condition, control a bleeding circuit of the charging device to which the first input voltage is input, start the bleeding circuit, and close a charging circuit of the charging device; the output module 603 is configured to output a second output voltage obtained after the voltage reduction processing is performed by the bleeding circuit.
In the voltage control device of the charging device provided in the embodiment of the application, in the charging process of the voltage control device of the charging device, the current first output voltage and the current first input voltage of the charging device can be detected in advance, and when the first output voltage and the first input voltage are detected to meet a first condition, the first input voltage is controlled to be input to the bleeder circuit of the charging device, the bleeder circuit is started, the charging circuit of the charging device is closed, and finally, the second output voltage obtained after the voltage reduction processing is performed through the bleeder circuit is output. Therefore, the bleeder circuit is arranged in the voltage control device of the charging device, the bleeder circuit is adopted to discharge and then step down when the output voltage is too high, the voltage value of the final output voltage is the voltage value within the conventional bearing range of the related device, the related device can be well protected, the hardware selection range of the charging battery is not limited, and the use cost of the device is reduced while the matching flexibility is improved.
Optionally, in an embodiment of the present application, the first condition includes: the first input voltage is greater than or equal to a first predetermined threshold, and the first output voltage is greater than or equal to a second predetermined threshold.
Optionally, in this embodiment of the present application, the apparatus 600 further includes a control module 604; the control module 604 is configured to control the first input voltage to be input to a charging circuit of the charging device, turn off the bleeding circuit, and turn on the charging circuit when the first input voltage satisfies a second condition; the output module 603 is configured to output the first output voltage.
It should be noted that, as shown in fig. 5, blocks that are necessarily included in the voltage control apparatus 600 of the charging device are illustrated by solid line blocks, such as a detection block 601; modules that may or may not be included in the voltage control apparatus 600 of the charging device are illustrated with dashed boxes, such as control module 604.
The voltage control device of the charging device in the embodiment of the present application may be a device, or may be a component, an integrated circuit, or a chip in a terminal. The device may be a mobile electronic device or a non-mobile electronic device. By way of example, the mobile electronic device may be a mobile phone, a tablet computer, a notebook computer, a palm top computer, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a Personal Digital Assistant (PDA), and the like, and the non-mobile electronic device may be a server, a Network Attached Storage (NAS), a personal computer (personal computer, PC), a Television (TV), a counter or a kiosk, and the like, and the embodiments of the present application are not limited in particular.
The voltage control apparatus of the charging device in the embodiment of the present application may be an apparatus having an operating system. The operating system may be an Android (Android) operating system, an ios operating system, or other possible operating systems, which is not specifically limited in the embodiments of the present application.
The voltage control apparatus of the charging device provided in the embodiment of the present application can implement each process implemented in the method embodiment of fig. 5, and is not described here again to avoid repetition.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order, depending on the functionality involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the above embodiment method can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application may be embodied in the form of a computer software product stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk), and including instructions for enabling a terminal (e.g., mobile phone, computer, server, or network device) to execute the methods according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the scope of the invention as defined by the appended claims.
Claims (16)
1. A method of voltage control of a charging device, the method comprising:
detecting a current first output voltage and a current first input voltage of the charging device in the charging process of the charging device;
under the condition that the first output voltage and the first input voltage are detected to meet a first condition, controlling the first input voltage to be input into a bleeder circuit in the charging device, starting the bleeder circuit and closing a charging circuit in the charging device;
and outputting a second output voltage obtained after voltage reduction treatment is carried out on the bleeder circuit.
2. The method of claim 1, wherein the first condition comprises: the first input voltage is greater than or equal to a first predetermined threshold, and the first output voltage is greater than or equal to a second predetermined threshold.
3. The method of claim 1, wherein after the initiating the bleeding circuit, the method further comprises:
under the condition that the first input voltage meets a second condition, controlling the first input voltage to be input into a charging circuit in the charging device, closing the bleeder circuit, and opening the charging circuit;
and outputting the first output voltage.
4. A voltage control circuit of a charging device, the voltage control circuit comprising: a processor and a bleeding circuit connected to the processor;
the processor is used for detecting a first output voltage output by an output end of the charging device and a first input voltage input by an input end of the charging device in the charging process of the charging device;
the processor is further configured to control the first input voltage to be input to the bleeding circuit and start the bleeding circuit when it is detected that the first output voltage and the first input voltage satisfy a first condition;
the bleeder circuit is used for carrying out voltage reduction treatment on the first input voltage;
the output end is connected with the bleeder circuit and used for outputting a second output voltage obtained after voltage reduction treatment is carried out on the bleeder circuit.
5. The voltage control circuit of claim 4, further comprising: with the bleeder circuit and the switch module that charging circuit is connected respectively, wherein:
the processor is specifically configured to control the switch module to turn on a path between an input end and the bleeding circuit and turn off a path between the input end and the charging circuit to control the first input voltage to be input to the bleeding circuit, start the bleeding circuit, and turn off the charging circuit in the charging device when it is detected that the first output voltage and the first input voltage satisfy a first condition.
6. The voltage control circuit of claim 4 or 5, wherein the first condition comprises: the first input voltage is greater than or equal to a first predetermined threshold, and the first output voltage is greater than or equal to a second predetermined threshold.
7. The voltage control circuit of claim 5, wherein the processor is further configured to:
under the condition that the first input voltage meets a second condition, controlling a path between a conduction input end of the switch module and the charging circuit, and closing a circuit between the conduction input end of the switch module and the bleeder circuit;
and outputting the first output voltage.
8. The circuit of claim 4 or 5, wherein the switching module comprises: the first determination information is information that the first input voltage and the first output voltage determined by the processor meet a first condition, and the second determination information is information that the first input voltage and the first output voltage determined by the processor do not meet the first condition;
the NOT gate circuit is used for closing the charging circuit under the condition of receiving the first determination information;
the NOT gate circuit is further used for starting the charging circuit under the condition of receiving the second determination information;
the AND gate circuit is used for starting the bleeder circuit under the condition of receiving the second determination information;
and the AND gate circuit is used for closing the bleeder circuit under the condition of receiving the second determination information.
9. The bleeder device is characterized by comprising a processor, a bleeder circuit, a charging circuit, and a switch module for controlling the opening and closing of the bleeder circuit and the charging circuit;
the processor is used for detecting a first level corresponding to a first output voltage output by an output end of the charging device and a second level corresponding to a first input voltage input by an input end of the charging device in the charging process of the charging device;
the switch module is used for closing the charging circuit and opening the bleeding circuit under the condition that the first level and the second level are detected to meet a first relation;
the bleeder circuit is used for carrying out voltage reduction processing on a first input voltage input into the bleeder circuit after the switch module starts the bleeder circuit.
10. The bleeder device of claim 9, wherein the processor comprises: a first voltage comparator and the second voltage comparator; the first voltage comparator is configured to detect a first output voltage output from the output terminal of the charging device and output the first level, and the second voltage comparator is configured to detect a first input voltage input from the input terminal and output the second level.
11. The bleeder device of claim 9, wherein the bleeder circuit comprises any one of: the first sub-circuit is composed of a field effect transistor MOS module and a diode, and the second sub-circuit is composed of a DCDC module.
12. The bleeder device of claim 9, wherein the switch module comprises: an AND gate circuit and a NOT gate circuit; the AND gate circuit is connected with the first voltage comparator, and the NOT gate circuit is connected with the AND gate circuit, the charging circuit and the bleeder circuit; the AND gate circuit outputs a target level according to the first level and the second level, and the NOT gate circuit controls the conduction states of the charging circuit and the discharging circuit according to the target level;
under the condition that the target level is a high level, the bleeder circuit is started, and the charging circuit is closed;
and when the target level is a low level, the charging circuit is started, and the discharging belt circuit is closed.
13. An apparatus for controlling a voltage of a charging device, the apparatus comprising: the device comprises a detection module, an execution module and an output module;
the detection module is used for detecting a current first output voltage and a current first input voltage of the charging device in the charging process of the charging device;
the execution module is configured to control the first input voltage to be input to a bleeding circuit in the charging device, start the bleeding circuit, and close a charging circuit in the charging device when the detection module detects that the first output voltage and the first input voltage meet a first condition;
and the output module is used for outputting a second output voltage obtained after voltage reduction treatment is carried out on the bleeder circuit.
14. The apparatus of claim 13, wherein the first condition comprises: the first input voltage is greater than or equal to a first predetermined threshold, and the first output voltage is greater than or equal to a second predetermined threshold.
15. The apparatus of claim 13, further comprising a control module;
the control module is used for controlling the first input voltage to be input into a charging circuit in the charging device, closing the bleeder circuit and opening the charging circuit under the condition that the first input voltage meets a second condition;
the output module is used for outputting the first output voltage.
16. A charging device characterized in that it comprises a voltage control circuit according to claims 4 to 8.
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| CN202111235134.8A CN114123381A (en) | 2021-10-22 | 2021-10-22 | Voltage control method, circuit and device of charging device |
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| CN202111235134.8A CN114123381A (en) | 2021-10-22 | 2021-10-22 | Voltage control method, circuit and device of charging device |
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