CN111835044A - Charging device, load device, and charging system - Google Patents
Charging device, load device, and charging system Download PDFInfo
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- CN111835044A CN111835044A CN201910309264.8A CN201910309264A CN111835044A CN 111835044 A CN111835044 A CN 111835044A CN 201910309264 A CN201910309264 A CN 201910309264A CN 111835044 A CN111835044 A CN 111835044A
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- 238000007600 charging Methods 0.000 title claims abstract description 319
- 238000004891 communication Methods 0.000 claims description 60
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- 238000004146 energy storage Methods 0.000 claims description 6
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- 238000010586 diagram Methods 0.000 description 11
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- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 4
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- 238000010280 constant potential charging Methods 0.000 description 2
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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
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Abstract
The invention relates to the technical field of electronic equipment charging, and discloses charging equipment, load equipment and a charging system. The charging device can adjust the electric energy of the power supply to a state that the load device can be directly used for charging and output the electric energy to the load device, so that the load device is directly used for charging a battery of the load device without adjustment after receiving the electric energy from the charging device. Through the mode, the charging system and the charging method can reduce the electric energy loss caused by the load equipment adjusting the electric energy from the charging equipment, and reduce the electric energy loss of the electric energy in the transmission process, thereby improving the charging efficiency.
Description
Technical Field
The present invention relates to the field of electronic device charging technologies, and in particular, to a charging device, a load device, and a charging system.
Background
With the popularization of TWS (True Wireless Stereo) headphones, users have increasingly demanded cruising ability of TWS headphones. In the charging scheme of the existing TWS earphone, a charging box is required to boost electric energy to a certain amplitude value, then the electric energy is transmitted to the TWS earphone, a charging chip arranged in the TWS earphone receives the electric energy and carries out corresponding adjustment, and then a battery of the TWS earphone is charged.
The charging efficiency of the charging scheme of the TWS headset at present is low because the electric energy with high amplitude is transmitted between the charging box and the TWS headset and the charging chip arranged in the TWS headset correspondingly adjusts the electric energy, which causes large electric energy loss.
Disclosure of Invention
In view of the above, the present invention provides a charging device, a load device and a charging system, which can improve charging efficiency.
In order to solve the technical problems, the invention adopts a technical scheme that: a charging apparatus is provided that includes a charging circuit and a first control circuit. The first input end of the charging circuit is connected with a power supply, and the output end of the charging circuit is used for being connected to a load device independent of the charging device, so that the electric energy of the power supply is adjusted to a state that the load device can be directly used for charging and is output to the load device. The first output end of the first control circuit is connected with the second input end of the charging circuit and used for controlling whether the charging circuit outputs electric energy to the load equipment or not, and the interaction end of the first control circuit is used for sending a communication signal to the load equipment, so that the load equipment works by utilizing the communication signal and carries out charging by receiving the electric energy.
In order to solve the technical problem, the invention adopts another technical scheme that: there is provided a load device including a battery, a second switching element, and a second control circuit. The input end of the second switch element is used for connecting a charging device independent of the load device, and the output end of the second switch element is connected with the battery. The interaction end of the second control circuit is used for being connected with the charging equipment, the output end of the second control circuit is connected with the control end of the second switch element so as to carry out communication signal interaction with the charging equipment, and the second control circuit works by utilizing the communication signal, and the communication signal comprises a switching signal output to the second switch element so as to be conducted, so that the electric energy from the charging equipment can be directly used for charging the battery without being adjusted.
In order to solve the technical problem, the invention adopts another technical scheme that: a charging system is provided that includes a charging device and a load device.
The charging device includes a charging circuit and a first control circuit. The first input end of the charging circuit is connected with a power supply, and the output end of the charging circuit is used for being connected to a load device independent of the charging device, so that the electric energy of the power supply is adjusted to a state that the load device can be directly used for charging and is output to the load device. The first output end of the first control circuit is connected with the second input end of the charging circuit and used for controlling whether the charging circuit outputs electric energy to the load equipment or not, and the interaction end of the first control circuit is used for sending a communication signal to the load equipment, so that the load equipment works by utilizing the communication signal and carries out charging by receiving the electric energy.
The load device includes a battery, a second switching element, and a second control circuit. The input end of the second switching element is used for being connected with the output end of a charging circuit of the charging device, and the output end of the second switching element is connected with the battery. The interaction end of the second control circuit is used for being connected with the interaction end of the first control circuit of the charging equipment, the output end of the second control circuit is connected with the control end of the second switch element so as to carry out communication signal interaction with the charging equipment, and the communication signal is utilized for working, the communication signal is output to the second switch element so as to be conducted, and therefore the electric energy from the charging equipment can be directly used for charging the battery without being adjusted.
The invention has the beneficial effects that: in contrast to the prior art, the present invention provides a charging device and a load device, wherein the load device is independent from the charging device, i.e. the charging device and the load device are independent entities respectively. The charging equipment can adjust the electric energy of the power supply to a state that the load equipment can be directly used for charging and output the electric energy to the load equipment, so that the load equipment can directly charge the battery of the load equipment without adjustment after receiving the electric energy from the charging equipment. That is, the charging device regulates the power to a state in which the load device can be directly used for charging and allows the load device to be directly used for charging the battery without regulation, thereby reducing power loss caused by the load device regulating the power from the charging device. In addition, the charging equipment adjusts the electric energy to the state that the load equipment can be directly used for charging, so that the electric energy with higher amplitude can be prevented from being transmitted between the charging equipment and the load equipment, the electric energy loss of the electric energy in the transmission process is reduced, and the charging efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:
fig. 1 is a schematic structural diagram of a charging device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another embodiment of the charging device of the present invention;
FIG. 3 is a schematic structural diagram of an embodiment of the load apparatus of the present invention;
FIG. 4 is a schematic structural diagram of another embodiment of a load apparatus of the present invention;
FIG. 5 is a schematic structural diagram of an embodiment of a charging system of the present invention;
fig. 6 is a schematic structural diagram of another embodiment of the charging system of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures. 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.
The terms "first", "second", and the like in the present invention are used for distinguishing different objects, not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a charging device according to an embodiment of the present invention.
In order to solve the technical problem of low charging efficiency between a charging device and a load device in the prior art, an embodiment of the present invention provides a charging device 1, where the charging device 1 includes: a charging circuit 11 and a first control circuit 12. The first input 111 of the charging circuit 11 is connected to the power source 13, and the output 112 of the charging circuit 11 is used for connecting to a load device independent of the charging device 1, so as to adjust the power of the power source 13 to a state that the load device can be directly used for charging and output to the load device. The first output end 121 of the first control circuit 12 is connected to the second input end 113 of the charging circuit 11, and is configured to control whether the charging circuit 11 outputs power to the load device, and the interaction end 122 of the first control circuit 12 is configured to send a communication signal to the load device, so that the load device operates by using the communication signal, including receiving power to perform charging. As described in detail below.
In a traditional design, a charging device boosts electric energy to a certain amplitude, then transmits the electric energy to a load device, receives the electric energy through a charging chip arranged in the load device, adjusts the electric energy correspondingly, and then charges a battery of the load device. In order to ensure that the electric energy provided by the charging device to the load device can meet the use requirement of the load device, the voltage value of the electric energy needs to be boosted to a higher amplitude value, such as 5V, and the like, which is generally higher than the amplitude value required by charging of the load device, so as to avoid that the voltage value of the electric energy does not reach the amplitude value required by charging of the load device. Correspondingly, the regulation of the electrical energy by the load device is usually in the form of a step-down. This results in that electric energy with a higher amplitude is transmitted between the charging device and the load device, and the charging chip built in the load device correspondingly adjusts the electric energy, which results in a larger electric energy loss, so that the charging efficiency between the conventional charging device and the load device is lower.
In view of this, an embodiment of the present invention provides a charging device 1 capable of improving charging efficiency, which is described in detail below.
Referring to fig. 1-2, fig. 2 is a schematic structural diagram of another embodiment of a charging device according to the present invention.
In an embodiment, the charging device 1 comprises a charging circuit 11. The first input 111 of the charging circuit 11 is connected to the power supply 13, and the output 112 of the charging circuit 11 is used for connecting to a load device independent of the charging device 1. The charging circuit 11 can adjust the power of the power supply 13 to a state where the load device can be directly used for charging and output to the load device. That is, the charging circuit 11 can adjust the power supplied by the power source 13 and then output the adjusted power to the load device, including adjusting the voltage value of the power and the like. In this way, the charging circuit 11 can adjust the power according to the requirement, so that the load device can be directly used for charging the battery without adjusting any more, thereby reducing the power loss caused by the load device adjusting the power from the charging device 1. Moreover, since the charging device 1 can adjust the electric energy to a required state (i.e. the voltage value of the electric energy is adjusted to a value that can be directly used for charging the battery of the load device without adjustment), rather than increasing the voltage to a value higher than the amplitude required for charging the load device (which requires the load device to step down to the voltage value required for charging the battery), it is possible to avoid the electric energy with a higher amplitude from being transmitted between the charging device 1 and the load device, reduce the electric energy loss of the electric energy during the transmission process, and further improve the charging efficiency.
It should be noted that the charging circuit 11 of the charging device 1 adjusts the electric energy to a corresponding state according to a set charging scheme, so that the load device is directly used for charging the load device without adjustment. The charging scheme of the charging device 1 may be a fast charging scheme in the field of charging technology, such as constant voltage charging, constant current to constant voltage charging, and the like, which belongs to the understanding scope of those skilled in the art and will not be described herein again.
Alternatively, the Charging circuit 11 may be a DC-DC Charging circuit, specifically a DC-DC Charging chip or the like, which is capable of adjusting the electric energy according to a set Charging scheme.
The charging equipment 1 and the load equipment are independent individuals respectively, and the load equipment can be separated from the charging equipment 1 and independently exist to execute corresponding work. For example, the load device may be a TWS headset or the like, and the charging device 1 may be a charging box or the like corresponding to the TWS headset. The user takes out the TWS earphone, so that the TWS earphone is separated from the charging box to realize the earphone function of the charging box, and the TWS earphone is placed back into the charging box for charging when the TWS earphone needs to be charged. Of course, the application environments of the charging device 1 and the load device are not limited to the charging box and the TWS headset, and are not limited thereto.
The charging device 1 further comprises a first control circuit 12. The first output terminal 121 of the first control circuit 12 is connected to the second input terminal 113 of the charging circuit 11, and is used for controlling whether the charging circuit 11 outputs power to the load device. Specifically, the first control circuit 12 inputs a corresponding signal to the second input terminal 113 of the charging circuit 11 through the first output terminal 121 thereof, indicating whether the charging circuit 11 outputs the electric energy to the load device. The interaction terminal 122 of the first control circuit 12 is configured to interact with a communication signal of the load device, so that the load device operates by using the communication signal, wherein the interaction terminal includes an operation content for receiving the electric energy to charge.
It should be noted that the linkage between the charging device 1 and the load device needs to be implemented by means of communication signal interaction. The method specifically comprises the steps that the interaction end 122 of the first control circuit 12 of the charging device 1 interacts with the load device through communication signals, sends communication signals for indicating charging of the load device and receives the communication signals confirmed by indication fed back by the load device (namely, the communication signals interact), the first control circuit 12 of the charging device 1 controls the charging circuit 11 to output electric energy to the load device, the load device learns that the charging device 1 is about to output the electric energy to the load device through the interacted communication signals, and prepares for receiving the electric energy (namely, the load device works through the communication signals), so that the charging device 1 charges the load device. Certainly, the linkage work between the charging device 1 and the load device may also include exchange of information of remaining power between the charging device 1 and the load device, pairing work between the charging device 1 and the load device before charging (for example, pairing between a TWS headset and a charging box), and the like, and the linkage work needs to be achieved by means of communication signal interaction, which is not limited herein.
Please continue to refer to fig. 1-2. In an embodiment, the charging device 1 further comprises a first common terminal 14, the first common terminal 14 being used for connecting a load device. Specifically, the first common terminal 14 is electrically connected to a corresponding terminal on the load device (specifically, may be in physical abutment to achieve electrical connection), and is used for power transmission and communication signal interaction between the charging device 1 and the load device. The output 112 of the charging circuit 11 and the interaction terminal 122 of the first control circuit 12 are commonly connected to the first common terminal 14.
That is, the power and the communication signal of the charging apparatus 1 are transmitted to the load apparatus through the same terminal (i.e., the first common terminal 14). In the conventional design, the electric energy and the communication signal of the charging device need to be transmitted to the load device through different terminals, which results in a complicated circuit structure and a large number of terminals of the conventional charging device, and is not favorable for the structure simplification and volume reduction of the charging device. In the embodiment, the electric energy and the communication signal of the charging device 1 are transmitted to the load device through the same terminal, so that the number of terminals of the charging device 1 can be reduced, the circuit structure of the charging device 1 can be simplified, and the structure simplification and the volume reduction of the charging device 1 are facilitated. Especially for the TWS headset and the corresponding charging box, the charging box with a smaller volume (i.e. the charging device 1) can certainly meet the requirement of the user on the volume of the charging box to the maximum extent, so as to be convenient for the user to carry.
In the case that one charging device 1 corresponds to a plurality of load devices, for example, one charging box charges at least two TWS headsets, etc., the charging device 1 may design the first common terminal 14 for each load device to perform signal interaction with each load device.
Further, the charging apparatus 1 further includes a first switching element 15. The control terminal 151 of the first switch element 15 is connected to the second output terminal 123 of the first control circuit 12, the first terminal 152 of the first switch element 15 is connected to the interaction terminal 122 of the first control circuit 12, and the second terminal 153 of the first switch element 15 is connected to the output terminal 112 of the charging circuit 11. The second output end 123 of the first control circuit 12 is configured to input a corresponding switch signal to the control end 151 of the first switch element 15, so as to control on/off of electrical connection between the first end 152 and the second end 153 of the first switch element 15, that is, to control on/off of electrical connection between the interaction end 122 of the first control circuit 12 and the first common terminal 14. The interaction terminal 122 of the first control circuit 12 is configured to interact with a load device through communication signals.
Alternatively, the first switching element 15 may be a mos transistor (metal-oxide-semiconductor field effect transistor) or the like.
In this embodiment, since the power and the communication signal of the charging apparatus 1 are transmitted by sharing the first common terminal 14, and the first common terminal 14 cannot transmit the power and the communication signal at the same time, the transmission of the power and the communication signal needs to be controlled in a time-sharing manner. Specifically, the first switch element 15 selectively turns on or off the electrical connection between the interaction terminal 122 of the first control circuit 12 and the first common terminal 14 to switch the operation mode of the first common terminal 14, that is, to switch the first common terminal 14 to the operation mode of transmitting the electrical energy or to switch the operation mode of transmitting the communication signal. When the first switch element 15 is turned on, the electrical connection between the interaction terminal 122 of the first control circuit 12 and the first common terminal 14 is turned on, the first common terminal 14 is used for performing communication signal interaction with the load device, and at this time, the charging circuit 11 does not output electric energy; when the first switch element 15 is turned off, the electrical connection between the interactive terminal 122 of the first control circuit 12 and the first common terminal 14 is broken, and the charging circuit 11 outputs power, and the first common terminal 14 is used for outputting power to the load device.
Further, the input terminal 124 of the first control circuit 12 is connected to the power supply 13 for supplying the first control circuit 12 with the power required for its normal operation. Also, the first control circuit 12 may be an element such as an MCU (micro controller Unit) integrated with a logic control circuit for controlling the charging circuit 11, the first switching element 15 and interacting with the load device.
Please continue to refer to fig. 1-2. In an embodiment, the charging device 1 further comprises a level control circuit 16. The level control circuit 16 is respectively connected to the interaction terminal 122 and the second output terminal 123 of the first control circuit 12, so that the level of the first control circuit 12 is matched with the level of the control circuit in the load device, and the problems of signal interaction abnormality and the like caused by level mismatch are avoided.
As can be seen from the above, the charging device provided by the present invention can adjust the electric energy of the power supply to the state that the load device can be directly used for charging and output to the load device, so that the load device can directly charge the battery of the load device without adjustment after receiving the electric energy from the charging device, thereby reducing the electric energy loss caused by the load device adjusting the electric energy from the charging device, avoiding the transmission of the electric energy with higher amplitude between the charging device and the load device, reducing the electric energy loss of the electric energy in the transmission process, and further improving the charging efficiency. As the charging efficiency of the charging device increases, the same amount of charge of the charging device allows more load devices to be charged.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a load device according to an embodiment of the present invention.
In order to solve the technical problem in the prior art that the charging efficiency between the charging device and the load device is low, an embodiment of the present invention provides a load device 2, where the load device 2 includes: a battery 21, a second switching element 22 and a second control circuit 23. The input 221 of the second switching element 22 is used for connecting a charging device independent of the load device 2, and the output 222 of the second switching element 22 is connected to the battery 21. The interaction terminal 231 of the second control circuit 23 is used for connecting the charging device, and the output terminal 232 of the second control circuit 23 is connected to the control terminal 223 of the second switch element 22, so as to perform communication signal interaction with the charging device, and work by using the communication signal, including outputting the switch signal to the second switch element 22 to turn on the second switch element, so that the battery 21 is directly charged by the electric energy from the charging device without adjustment. As described in detail below.
Referring to fig. 3-4, fig. 4 is a schematic structural diagram of another embodiment of the load device of the present invention.
In an embodiment, the load device 2 comprises a battery 21 and a second switching element 22. The input 221 of the second switching element 22 is used for connecting a charging device independent of the load device 2, and the output 222 of the second switching element 22 is connected to the battery 21. That is, in the state where the second switching element 22 is turned on, the electric energy from the charging device can reach the battery 21 through the second switching element 22 to charge the battery 21 of the load device 2. Since the second switching element 22 does not have a function of adjusting the electric power, the electric power from the charging device can be directly used for charging the battery 21 without adjustment.
In this way, the power loss caused by the load device 2 adjusting the power from the charging device can be reduced; and the voltage value of the electric energy does not need to be adjusted to be higher than the amplitude required by charging of the load equipment 2 in advance (only the amplitude required by charging of the load equipment 2 needs to be adjusted), so that the electric energy with higher amplitude can be prevented from being transmitted between the charging equipment and the load equipment 2, the electric energy loss of the electric energy in the transmission process is reduced, and the charging efficiency is further improved.
In addition, the load device 2 omits a built-in charging chip required in the conventional design, and instead, the second switching element 22 directly receives power for charging, which can reduce the cost of the load device 2. Although the charging device needs to add a circuit for adjusting the power, since the charging device is usually designed to correspond to a plurality of load devices 2 to charge the plurality of load devices 2 simultaneously (for example, the charging box usually corresponds to at least two TWS headsets, etc.), the cost saved by the load devices 2 will be much larger than the cost added by the charging device for adding the circuit for adjusting the power.
Alternatively, the second switching element 22 may be a mos transistor (metal-oxide-semiconductor field effect transistor) or the like.
The load device 2 further comprises a second control circuit 23. The interaction terminal 231 of the second control circuit 23 is used for connecting the charging device, and the output terminal 232 of the second control circuit 23 is connected to the control terminal 223 of the second switch element 22, so as to perform communication signal interaction with the charging device, and work by using the communication signal, including outputting the switch signal to the second switch element 22 to turn on the second switch element, so that the electric energy from the charging device directly charges the battery 21 without adjustment.
Specifically, the interaction terminal 231 of the second control circuit 23 is configured to perform communication signal interaction with the charging device after being connected to the charging device, so as to implement the linkage work between the charging device and the load device 2. The method includes the linkage work of charging the load device 2 by the charging device, specifically includes the communication signal interaction required by the charging operation of the load device 2 and the charging device through the interaction terminal 231 of the second control circuit 23, and may include the communication signal interaction processes of pairing the load device 2 and the charging device, indicating by the charging device that the load device 2 is to be charged, feeding back indication confirmation information by the load device 2, and the like; then, the output terminal 232 of the second control circuit 23 of the load device 2 inputs a corresponding switching signal to the control terminal 223 of the second switching element 22 to the second switching element 22, so that the second switching element 22 is turned on (i.e., the load device 2 operates by using the communication signal), so that the electric energy from the charging device can reach the battery 21 of the load device 2 through the second switching element 22, and the battery 21 is directly charged without adjustment.
Please continue to refer to fig. 3-4. In an embodiment, the load device 2 further comprises a second common terminal 24, the second common terminal 24 being used for connecting a charging device. Specifically, the second common terminal 24 is electrically connected to a corresponding terminal (i.e., the first common terminal) of the charging device, and is used for power transmission and communication signal interaction between the charging device and the load device 2. The input terminal 221 of the second switching element 22 and the interaction terminal 231 of the second control circuit 23 are commonly connected to the second common terminal 24.
That is, the power and the communication signal of the load device 2 interact with the charging device through the same terminal (i.e., the second common terminal 24). In the conventional design, the electric energy and the communication signal of the load device need to interact with the charging device through different terminals, which results in that the circuit structure of the conventional load device is complicated, and the number of the terminals is large, thus being not beneficial to the structure simplification and the volume reduction of the load device. In the embodiment, the electric energy and the communication signal of the load device 2 interact with the charging device through the same terminal, so that the number of terminals of the load device 2 can be reduced, the circuit structure of the load device 2 can be simplified, and the structure simplification and the volume reduction of the load device 2 are facilitated. Especially for the TWS headset and the corresponding charging box thereof, the TWS headset with a smaller volume (i.e. the load device 2) can certainly meet the requirement of the user on the volume of the TWS headset to the maximum extent, so as to be convenient for the user to wear and carry about.
For the case that one charging device corresponds to a plurality of load devices 2, for example, one charging box charges at least two TWS earphones, the charging device is designed with a plurality of first common terminals, and the second common terminal 24 of the load device 2 is electrically connected to the first common terminal corresponding to the charging device for signal interaction with the charging device.
Alternatively, the second control circuit 23 may be an element such as an MCU (micro controller Unit), a CPLD (Complex Programmable Logic Device) integrated with a Logic control circuit, and is used for controlling the second switch element 22 and interacting with the charging Device.
Please continue to refer to fig. 3-4. In an embodiment, the load device 2 further comprises a tank circuit 25. The input terminal of the energy storage circuit 25 is used for connecting the charging device, and the output terminal of the energy storage circuit 25 is connected to the input terminal 233 of the second control circuit 23. The energy storage circuit 25 is configured to receive and store electrical energy from the charging device, so as to operate the second control circuit 23.
Specifically, when the charging device attempts to perform communication signal interaction with the load device 2, the charging device transmits a communication signal to the load device 2, and the electric energy of the communication signal can charge the energy storage circuit 25 for the second control circuit 23 to work. And, when the charging device outputs the electric energy to the load device 2, the electric energy can also charge the energy storage circuit 25, so that the second control circuit 23 operates normally.
Further, the tank circuit 25 includes a one-way conducting element 251 and a capacitor 252. The input terminal of the one-way conducting element 251 is used for connecting the charging device, and the output terminal of the one-way conducting element 251 is connected to the input terminal 233 of the second control circuit 23. The positive electrode of the capacitor 252 is connected between the output terminal of the unidirectional conducting element 251 and the input terminal 233 of the second control circuit 23, the negative electrode of the capacitor 252 is grounded, and the capacitor 252 is used for receiving the electric energy from the charging device and storing the electric energy for the second control circuit 23 to operate. The one-way conductive element 251 is used to prevent current from flowing backwards.
Alternatively, the one-way conduction element 251 may be a diode or the like. The current flow direction is limited by utilizing the unidirectional conduction characteristic of the diode, and the current is prevented from flowing backwards. The diode as the unidirectional conducting element 251 is low in cost, which is beneficial to reducing the cost of the load device 2.
It can be seen from the above that, the load device provided by the present invention can directly charge the battery of the load device without adjustment after receiving the electric energy from the charging device, so that the electric energy loss caused by the load device adjusting the electric energy from the charging device is reduced, and the electric energy with higher amplitude can be prevented from being transmitted between the charging device and the load device, so that the electric energy loss of the electric energy in the transmission process is reduced, and the charging efficiency is further improved. As the charging efficiency of the charging device increases, the same amount of charge of the charging device allows more load devices to be charged.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a charging system according to an embodiment of the present invention.
In an embodiment, the charging system includes a charging device 1 and a load device 2. The charging device 1 is used to charge the load device 2. The charging system may be a system composed of a TWS headset and a charging box, or the like.
The charging apparatus 1 includes a charging circuit 11 and a first control circuit 12. The first input 111 of the charging circuit 11 is connected to the power source 13, and the output 112 of the charging circuit 11 is used for connecting to the load device 2 independent of the charging device 1, so as to adjust the power of the power source 13 to a state that the load device 2 can be directly used for charging and output to the load device 2. The first output end 121 of the first control circuit 12 is connected to the second input end 113 of the charging circuit 11, and is configured to control whether the charging circuit 11 outputs power to the load device 2, and the interaction end 122 of the first control circuit 12 is configured to send a communication signal to the load device 2, so that the load device 2 works by using the communication signal, including receiving power for charging.
The load device 2 includes a battery 21, a second switching element 22, and a second control circuit 23. The input 221 of the second switching element 22 is used to connect the output 112 of the charging circuit 11 of the charging device 1, and the output 222 of the second switching element 22 is connected to the battery 21. The interaction terminal 231 of the second control circuit 23 is used for connecting the interaction terminal 122 of the first control circuit 12 of the charging device 1, and the output terminal 232 of the second control circuit 23 is connected to the control terminal 223 of the second switch element 22 to perform communication signal interaction with the charging device 1, and work by using the communication signal, which includes outputting a switch signal to the second switch element 22 to turn on the second switch element 22, so that the battery 21 is directly charged by the electric energy from the charging device 1 without being adjusted.
It should be noted that specific circuit structures and operation principles of the charging device 1 and the load device 2 have been described in detail in the above embodiments, and are not described herein again. For the TWS headset and the charging box, the charging device 1 can charge at least two load devices 2, including at least two load devices 2 of the left and right earphones, and the circuit structures of the left and right earphones are the same. Fig. 6 shows a case where the charging device 1 charges a plurality of load devices 2.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A charging apparatus, characterized in that the charging apparatus comprises:
the first input end of the charging circuit is connected with a power supply, and the output end of the charging circuit is used for being connected to a load device independent of the charging device, so that the electric energy of the power supply is adjusted to a state that the load device can be directly used for charging and is output to the load device;
the first output end of the first control circuit is connected with the second input end of the charging circuit and used for controlling whether the charging circuit outputs electric energy to the load equipment or not, and the interaction end of the first control circuit is used for carrying out communication signal interaction with the load equipment, so that the load equipment works by utilizing the communication signal and receives the electric energy for charging.
2. The charging device of claim 1, further comprising a first common terminal to which an output of the charging circuit and an interaction terminal of the first control circuit are commonly connected, the first common terminal for connection to the load device.
3. The charging device according to claim 2, further comprising a first switch element, wherein a control terminal of the first switch element is connected to the second output terminal of the first control circuit, a first terminal of the first switch element is connected to the interaction terminal of the first control circuit, a second terminal of the first switch element is connected to the output terminal of the charging circuit, and the first switch element is configured to control on/off of an electrical connection between the interaction terminal of the first control circuit and the first common terminal.
4. The charging device of claim 1, further comprising a level control circuit, wherein the level control circuit is connected to the first control circuit and the second control circuit respectively.
5. The charging device of claim 1, wherein the charging circuit is a DC-DC charging circuit.
6. A load device, characterized in that the load device comprises:
a battery;
a second switching element, an input terminal of the second switching element is used for connecting a charging device independent of the load device, and an output terminal of the second switching element is connected with the battery;
and the interaction end of the second control circuit is used for connecting the charging equipment, the output end of the second control circuit is connected with the control end of the second switch element so as to interact with the communication signal of the charging equipment, and the communication signal works and comprises an output switch signal which is output to the second switch element so as to be conducted, so that the electric energy from the charging equipment is directly charged to the battery without being adjusted.
7. The load device according to claim 6, further comprising a second common terminal to which the input terminal of the second switching element and the interaction terminal of the second control circuit are commonly connected, the second common terminal being used for connecting the charging device.
8. The load device according to claim 6, further comprising a tank circuit having an input for connection to the charging device and an output for connection to an input of the second control circuit, the tank circuit being configured to receive electrical energy from the charging device and store the electrical energy for operation by the second control circuit.
9. The load device of claim 8, wherein the energy storage circuit comprises a unidirectional conducting element and a capacitor;
the input end of the unidirectional conducting element is used for connecting the charging equipment, and the output end of the unidirectional conducting element is connected with the input end of the second control circuit;
the positive pole of the capacitor is connected between the output end of the one-way conduction element and the input end of the second control circuit, the negative pole of the capacitor is grounded, and the capacitor is used for receiving electric energy from the charging equipment and storing the electric energy so as to enable the second control circuit to work.
10. A charging system, characterized in that the charging system comprises a charging device and a load device;
the charging apparatus includes:
the first input end of the charging circuit is connected with a power supply, and the output end of the charging circuit is used for being connected to the load equipment independent of the charging equipment so as to adjust the electric energy of the power supply to a state that the load equipment can be directly used for charging and output to the load equipment;
a first control circuit, a first output end of which is connected to a second input end of the charging circuit, and is used for controlling whether the charging circuit outputs electric energy to the load device, and an interaction end of which is used for interacting with the load device with a communication signal, so that the load device works by using the communication signal, including receiving the electric energy for charging;
the load device includes:
a battery;
a second switching element, an input terminal of the second switching element is used for connecting an output terminal of the charging circuit of the charging device, and an output terminal of the second switching element is connected with the battery;
and the interaction end of the second control circuit is used for being connected with the interaction end of the first control circuit of the charging equipment, and the output end of the second control circuit is connected with the control end of the second switch element so as to interact with the communication signal of the charging equipment and utilize the communication signal to work, and the communication signal comprises an output switch signal which is transmitted to the second switch element to enable the second switch element to be conducted, so that the electric energy from the charging equipment directly charges the battery without being adjusted.
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| CN201910309264.8A CN111835044B (en) | 2019-04-17 | 2019-04-17 | Charging device, load device, and charging system |
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| CN201910309264.8A CN111835044B (en) | 2019-04-17 | 2019-04-17 | Charging device, load device, and charging system |
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| CN111835044B (en) | 2024-06-21 |
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