CN115208000A - Balanced charging circuit and method - Google Patents
Balanced charging circuit and method Download PDFInfo
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- CN115208000A CN115208000A CN202111352585.XA CN202111352585A CN115208000A CN 115208000 A CN115208000 A CN 115208000A CN 202111352585 A CN202111352585 A CN 202111352585A CN 115208000 A CN115208000 A CN 115208000A
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- 238000007600 charging Methods 0.000 title claims abstract description 371
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- 238000004891 communication Methods 0.000 claims description 106
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- 101000697493 Homo sapiens Large proline-rich protein BAG6 Proteins 0.000 claims description 5
- 102100028047 Large proline-rich protein BAG6 Human genes 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000010280 constant potential charging Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 238000010277 constant-current charging Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 239000004065 semiconductor Substances 0.000 description 2
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- 101150102866 adc1 gene Proteins 0.000 description 1
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- 230000005540 biological transmission Effects 0.000 description 1
- 238000010281 constant-current constant-voltage charging Methods 0.000 description 1
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1025—Accumulators or arrangements for charging
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a balanced charging circuit and a method. The balance charging method is used for charging management of a first earphone battery of a first wireless earphone and a second earphone battery of a second wireless earphone, and comprises the following steps: acquiring the battery voltage of a first earphone battery and the battery voltage of a second earphone battery; determining whether a difference between a battery voltage of the first earphone battery and a battery voltage of the second earphone battery exceeds a set balance threshold; if so, the charging current of the first earphone battery and/or the charging current of the second earphone battery is configured such that the charging current of the earphone battery with the lower battery voltage is larger than the charging current of the earphone battery with the higher battery voltage. In this way, the remaining power of the two wireless earphones can be driven to be consistent.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of charging management, in particular to a balanced charging circuit and a balanced charging method for a wireless earphone.
[ background ] A method for producing a semiconductor device
There are two common prior art wireless headsets: a left wireless headset and a right wireless headset. In the using process, since the batteries of the two wireless earphones cannot be completely the same when manufactured, and in addition, circuits (chips) in the earphone systems are different, even if the batteries are designed by the same chip, the manufacturing is different. In addition, in many designs, the wireless headset is divided into a master wireless headset and a slave wireless headset, and the current consumption of the master wireless headset is generally larger than that of the slave wireless headset.
And the difference of the use habits of the users causes the difference of the electric quantity of the batteries of the left wireless earphone and the right wireless earphone. These differences cause differences in the remaining power of the two wireless earphones, which may cause large differences over time, and in a severe case, the power of one wireless earphone is sufficient, but the power of the other wireless earphone tends to be exhausted, which may cause differences in circuit performance, such as affecting the performance of an audio circuit, and causing differences in characteristics such as audio frequency, radio frequency, etc. (including but not limited to, differences in output volume, differences in noise resistance of audio signals, differences in radio frequency connection distance, differences in standby time of the two earphones, etc.).
As technology continues to evolve, users also want left and right wireless headset performance to remain consistent.
[ summary of the invention ]
One of the objectives of the present invention is to provide a balance charging circuit and method, which can make the remaining power of two wireless headsets uniform.
According to an aspect of the present invention, there is provided a balance charging method for charge management of a first earphone battery of a first wireless earphone and a second earphone battery of a second wireless earphone, comprising: acquiring the battery voltage of a first earphone battery and the battery voltage of a second earphone battery; determining whether a difference between a battery voltage of the first earphone battery and a battery voltage of the second earphone battery exceeds a set balance threshold; if so, the charging current of the first earphone battery and/or the charging current of the second earphone battery is configured such that the charging current of the earphone battery with the lower battery voltage is larger than the charging current of the earphone battery with the higher battery voltage.
According to another aspect of the present invention, there is provided a balance charging circuit, comprising: a first wireless headset comprising a first headset battery; a second wireless headset comprising a second headset battery; the charging box comprises a charging box battery, a charging box control module and a charging control module, wherein the charging box battery is used for accommodating the first wireless earphone and the second wireless earphone, supplying power or charging the first wireless earphone and supplying power or charging the second wireless earphone, the battery voltage of the first earphone battery and the battery voltage of the second earphone battery are obtained, and whether the difference value of the battery voltage of the first earphone battery and the battery voltage of the second earphone battery exceeds a set balance threshold value or not is determined; if so, the charging current of the first earphone battery and/or the charging current of the second earphone battery are/is configured such that the charging current of the earphone battery with the lower battery voltage is larger than the charging current of the earphone battery with the higher battery voltage.
Compared with the prior art, when the difference value of the battery voltages of the two earphone batteries exceeds the set balance threshold value, the charging current of the first earphone battery and/or the charging current of the second earphone battery are/is adjusted, so that the charging current of the earphone battery with lower battery voltage is larger than the charging current of the earphone battery with higher battery voltage, and the residual electric quantity of the two earphone batteries is balanced.
Specific, further advantageous effects that can be achieved by the present invention will be described in detail below with reference to specific embodiments.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of 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 inventive exercise. Wherein:
FIG. 1 is a block diagram of a balance charging circuit according to a first embodiment of the present invention;
FIG. 2 is a block diagram of a balance charging circuit according to a second embodiment of the present invention;
FIG. 3 is a block diagram of a balance charging circuit according to a third embodiment of the present invention; and
fig. 4 is a circuit diagram of an earphone charging management unit in the charging box of the present invention in one embodiment.
[ detailed description ] embodiments
In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the following description of the exemplary embodiments of the present application with reference to the accompanying drawings is made in further detail, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all the embodiments. It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict.
The principle of the invention is that charging currents of the left wireless earphone and the right wireless earphone are coordinated through wired or wireless communication to compensate the difference of the residual electric quantity of the left wireless earphone and the right wireless earphone, so that earphone batteries of the left wireless earphone and the right wireless earphone keep nearly consistent residual electric quantity, and the performances of the left wireless earphone and the right wireless earphone keep the same.
Fig. 1 is a block diagram of a balance charging circuit according to a first embodiment of the present invention. The balance charging circuit according to the present invention is applied to a TWS (True Wireless Stereo) headset charging circuit, which is composed of two parts (as shown in fig. 1). The first part of the circuit is located in a charging box, and the circuit 100 in the charging box comprises a charging box charger 110, a power conversion circuit 120 and a charging box battery BAT3. The second part of the circuit is located in a TWS earphone (hereinafter referred to as a wireless earphone) which at least comprises an earphone charging unit which can be set with charging current. The charging box charger 110 in the charging box realizes a function of charging the charging box battery BAT3, and the power conversion circuit 120 is configured to convert the voltage of the charging box battery BAT3 into a suitable voltage VCHG to provide a suitable supply voltage for the wireless headset. There are typically two wireless headsets, a first wireless headset 200a and a second wireless headset 200b, respectively. The first wireless headset 200a comprises a first headset charging unit, a first headset battery BAT1, a first application processor and a first communication unit, which in the embodiment of fig. 1 is a wireless radio frequency communication unit RF1. The second wireless headset 200b includes a second headset charging unit, a second headset battery BAT2, a second application processor, and a second communication unit, wherein in the embodiment of fig. 1, the second communication unit is a wireless radio frequency communication unit RF2. The charging box is used for accommodating the first wireless earphone 200a and the second wireless earphone 200b, supplying power or charging for the first wireless earphone, and supplying power or charging for the second wireless earphone. The first earphone charging unit and the second earphone charging unit can both provide charging currents with adjustable magnitudes.
The first wireless headset 200a further includes a first analog-to-digital conversion unit ADC1. The second wireless headset 200b further comprises a second analog-to-digital conversion unit ADC2.
There are a number of implementations as to how the balancing control mechanism is initiated.
In a first implementation manner, the first wireless headset 200a and the second wireless headset respectively transmit the battery voltages of their respective headset batteries to an external terminal, such as a smartphone terminal, a laptop computer, a tablet computer, etc., through the first communication unit and the second communication unit, and an application processor of the external terminal determines whether a difference between the battery voltages of the two wireless headsets exceeds a set balance threshold, such as 0.1v,0.2v, etc. If the difference between the battery voltages of the two wireless headsets exceeds a balance threshold (e.g., 0.1V), a control signal is sent to the first communication unit of the first wireless headset 200a and the second communication unit of the second wireless headset 200b to initiate a balance control mechanism, thereby configuring the charging current of the first headset battery and/or the charging current of the second headset battery such that the charging current of the headset battery with a lower battery voltage is greater than the charging current of the headset battery with a higher battery voltage. With such a differential arrangement, the headset battery voltages in the two wireless headsets may tend to be consistent over time.
In one embodiment, the balance control mechanism may specifically be: the charging current of the earphone battery with the lower battery voltage is increased and the charging current of the earphone battery with the higher battery voltage is decreased or maintained, or the charging current of the earphone battery with the lower battery voltage is maintained and the charging current of the earphone battery with the higher battery voltage is decreased to increase the difference in charging current of the two earphone batteries. Preferably, the difference in charging current of the two earphone batteries may be proportional to the difference in battery voltage of the two earphone batteries, so that voltage balancing is achieved more quickly.
Specifically, if the battery voltage of the first headphone battery BAT1 is low, the charging current of the first headphone battery BAT1 and the charging current of the second headphone battery BAT2 are configured, so that the charging current of the first headphone battery BAT1 is greater than the charging current of the second headphone battery; if the battery voltage of the first earphone battery BAT1 is high, the charging current of the first earphone battery BAT1 and/or the charging current of the second earphone battery BAT2 are configured, so that the charging current of the first earphone battery BAT1 is greater than the charging current of the second earphone battery BAT 2.
The first earphone charging unit and the second earphone charging unit can adjust the charging current provided by the first earphone charging unit and the second earphone charging unit to the corresponding earphone batteries. In one embodiment, the prior art can be referred to how the earphone charging unit performs constant current charging and constant voltage charging on the earphone battery. In one example, the earphone charging unit may collect a charging current provided to the earphone battery, compare the collected charging current with a reference current threshold, and then continuously adjust the magnitude of the charging current according to a difference between the collected charging current and the reference current threshold, so that the charging current is stabilized at the reference current threshold. In the present invention, the magnitude of the charging current supplied to the earphone battery may be adjusted by adjusting the magnitude of the reference current threshold.
In a second implementation manner, the first wireless headset 200a and the second wireless headset 200b may send the battery voltage of their respective headset batteries to another wireless headset through the wireless radio frequency communication modules RF1 and RF2, the application processor in each wireless headset compares the battery voltage of its own headset battery with the battery voltage of the headset battery of another wireless headset, if it is determined that the difference between the battery voltages of the two headset batteries exceeds the set balance threshold, the balance control mechanism is started, otherwise, the balance control mechanism is not started. The balance control mechanism is as described above, for example, if the battery voltage in the earphone is higher, the charging current of the earphone battery is reduced or maintained, and if the battery voltage in the earphone is lower, the charging current of the earphone battery is maintained or increased.
In a preferred embodiment, when it is determined that the difference between the battery voltage of the first earphone battery BAT1 and the battery voltage of the second earphone battery BAT2 exceeds the set balance threshold, the charging current of the wireless earphone with a higher battery voltage is reduced while the supply voltage supplied to the earphone charging unit thereof is reduced, thereby improving energy efficiency; the charging current of the wireless earphone with lower voltage is increased, and the power supply voltage provided for the earphone charging unit is increased, so that the earphone charging circuit in the wireless earphone can obtain high enough voltage to provide larger charging current.
Fig. 2 is a block diagram of a balanced charging circuit according to a second embodiment of the present invention. In this embodiment, wired communication is used to communicate the battery voltage, as shown in FIG. 2. Compared with fig. 1, three wired communication units Com1, com2, and Com3 are added, and information transmission can be performed through a charged line (VCHG node), in this embodiment, the first communication unit is the wired communication unit Com1, the second communication unit is the wired communication unit Com2, the charging box includes the wired communication unit Com3, and all three wired communication units are connected to the node VCHG. In one implementation, the first wired communication unit Com1 of the first wireless headset may send the battery voltage in the first wireless headset directly through the node VCHG into the second wired communication unit Com2 of the second wireless headset; the second wired communication unit Com2 may also send the battery voltage in the second wireless headset directly through the node VCHG to the first wired communication unit Com1 of the first wireless headset. In another implementation, the first wired communication unit Com1 first sends the battery voltage in the first wireless headset to the third wired communication unit Com3 of the charging box, and then the third wired communication unit Com3 sends this information to the second wired communication unit Com2 of the second wireless headset; likewise, the second wired communication unit Com2 first transmits the battery voltage in the second wireless headset to the third wired communication unit Com3 of the charging box, and then the third wired communication unit Com3 transmits this information to the first wired communication unit Com1 module of the first wireless headset. When each wireless earphone knows the battery voltage of the other wireless earphone, the application processor in each wireless earphone compares the battery voltage of the earphone battery with the battery voltage of the earphone battery of the other wireless earphone, if the difference value of the battery voltages of the two earphone batteries is judged to exceed the set balance threshold value, the balance control mechanism is started, otherwise, the balance control mechanism is not started.
Fig. 3 is a block diagram of a balance charging circuit in a third embodiment of the present invention. As shown in fig. 3, the first wireless headset and the second wireless headset are placed in a charging box when they need to be charged, the charging box includes a charging box battery BAT3 and a headset charging management unit 140, the headset charging management unit 140 has a first power output terminal and a second charging output terminal, the first power output terminal VO1 of the charging box is coupled to the power input terminal of the first wireless headset 200a, the second power output terminal VO2 of the charging box is coupled to the power input terminal of the second wireless headset 200b, the power input terminal of the first wireless headset 200a is coupled to the first headset battery BAT1, and the power input terminal of the second wireless headset 200b is coupled to the second headset battery BAT 2. The earphone charging management unit 140 performs charging management on the first earphone battery BAT1 through the first power output end and the power input end of the first wireless earphone, and the earphone charging management unit 140 performs charging management on the second earphone battery BAT1 through the second power output end and the power input end of the second wireless earphone. The earphone charging management unit 140 obtains a battery voltage of the first earphone battery BAT1 through the first power output end, obtains a battery voltage of the second earphone battery BAT2 through the second power output end, and the earphone charging management unit 140 determines whether a difference value between the battery voltage of the first earphone battery and the battery voltage of the second earphone battery exceeds a set balance threshold value, and if so, starts a balance control mechanism, that is, the earphone charging management unit 140 configures a charging current of the first earphone battery output through the first power output end and/or a charging current of the second earphone battery output through the second power output end, so that the charging current of the earphone battery with a lower battery voltage is greater than the charging current of the earphone battery with a higher battery voltage.
According to an aspect of the present invention, the present invention is implemented as a balance charging method for charge management of a first earphone battery BAT1 of a first wireless earphone 200a and a second earphone battery BAT2 of a second wireless earphone 200b, including: acquiring the battery voltage of a first earphone battery and the battery voltage of a second earphone battery; determining whether a difference between a battery voltage of the first earphone battery and a battery voltage of the second earphone battery exceeds a set balance threshold; if so, the charging current of the first earphone battery and/or the charging current of the second earphone battery is configured such that the charging current of the earphone battery with the lower battery voltage is larger than the charging current of the earphone battery with the higher battery voltage.
In one embodiment, said configuring the charging current of the first earphone battery and the charging current of the second earphone battery such that the charging current of the earphone battery with a lower battery voltage is larger than the charging current of the earphone battery with a higher battery voltage comprises: if the battery voltage of the first earphone battery is lower, configuring the charging current of the first earphone battery and the charging current of the second earphone battery so that the charging current of the first earphone battery is larger than the charging current of the second earphone battery; if the battery voltage of the first earphone battery is higher, the charging current of the first earphone battery and/or the charging current of the second earphone battery are/is configured so that the charging current of the first earphone battery is smaller than the charging current of the second earphone battery.
In one embodiment, said configuring the charging current of the first earphone battery and/or the charging current of the second earphone battery comprises: the charging current of the earphone battery with the lower battery voltage is increased or maintained, and the charging current of the earphone battery with the higher battery voltage is decreased or maintained, so that the difference of the charging currents of the two earphone batteries is increased.
In one embodiment, said configuring the charging current of the first earphone battery and/or the charging current of the second earphone battery comprises: the difference in charging current of the two headset batteries is proportional to the difference in battery voltage of the two headset batteries.
In one embodiment, as shown in fig. 1 and 2, the first wireless headset further includes a first communication unit and a first headset charging unit, the second wireless headset further includes a second communication unit and a second headset charging unit, the first headset charging unit provides charging current for the first headset battery, the second headset charging unit provides charging current for the second headset battery, the first wireless headset and the second wireless headset are placed in a charging box 100 when charging is needed, and the charging box provides power for the first headset charging unit of the first wireless headset and provides power for the second headset charging unit of the second wireless headset.
In one embodiment, the first wireless headset 200a transmits the battery voltage of the first headset battery to an external terminal, such as a mobile phone, through the first communication unit, and the second wireless headset 200b transmits the battery voltage of the second headset battery to the external terminal, such as a mobile phone, through the second communication unit, and the external terminal determines whether a difference between the battery voltage of the first headset battery and the battery voltage of the second headset battery exceeds a set balance threshold, and transmits a control signal to the first communication unit of the first wireless headset and the second communication unit of the second wireless headset when the difference exceeds the set balance threshold, so as to configure the charging current of the first headset battery and/or the charging current of the second headset battery, such that the charging current of the headset battery with a lower battery voltage is greater than the charging current of the headset battery with a higher battery voltage.
In one embodiment, the first wireless headset 200a transmits the battery voltage of the first headset battery to the second wireless headset 200b through the first communication unit, the second wireless headset transmits the battery voltage of the second headset battery to the first wireless headset through the second communication unit, each wireless headset individually determines whether a difference between the battery voltage of the first headset battery and the battery voltage of the second headset battery exceeds a set balance threshold, and configures the charging current of the first headset battery and/or the charging current of the second headset battery such that the charging current of the headset battery with a lower battery voltage is greater than the charging current of the headset battery with a higher battery voltage when the difference exceeds the set balance threshold.
In one embodiment, the first wireless headset 200a sends the battery voltage of the first headset battery to the charging box through the first communication unit, the second wireless headset 200b sends the battery voltage of the second headset battery to the charging box 100 through the second communication unit, the charging box forwards the battery voltage of the first headset battery to the second wireless headset, and forwards the battery voltage of the second headset battery to the first wireless headset, each wireless headset determines whether a difference between the battery voltage of the first headset battery and the battery voltage of the second headset battery exceeds a set balance threshold, and when the difference exceeds the set balance threshold, the charging current of the first headset battery and/or the charging current of the second headset battery are/is configured such that the charging current of the headset battery with a lower battery voltage is greater than the charging current of the headset battery with a higher battery voltage.
As shown in fig. 1, the first communication unit is a first radio frequency communication unit RF1, the second communication unit is a second radio frequency communication unit RF2, and the communication between the first wireless headset and the second wireless headset and the communication with the external terminal or the charging box are wireless communication.
As shown in fig. 2, the first communication unit is a first wired communication unit Com1, the second communication unit is a second wired communication unit Com2, the charging box 100 has a third wired communication unit Com3, a power output end of the charging box is coupled to a power input end of the first wireless headset, a power output end of the charging box is coupled to a power input end of the second wireless headset, the third communication unit is coupled to a power output end of the charging box, the first wired communication unit Com1 is coupled to a power input end of the first wireless headset, the second wired communication unit Com2 is coupled to a power input end of the second wireless headset, a wired path is established between the power input end of the first wireless headset and the power input end of the second wireless headset by the power output end of the charging box and/or the third wired communication unit, communication between the first wireless headset and the second wireless headset is performed by a wired path between the power input end of the first wireless headset and the power input end of the second wireless headset, communication between the first wireless headset and the charging box is performed by a wired communication between the power input end of the first wireless headset and the second wireless headset, and the wireless communication between the charging box is performed by a wired communication between the wireless headset input end of the second wireless headset.
Fig. 4 is a circuit diagram of the headset charging management unit 140 with charging management function in fig. 3 in an embodiment.
The headset charging management unit 140 includes:
an inductor L1 coupled between the first intermediate node SW and the second intermediate node a;
a first switch S1 coupled between the first intermediate node SW and the power input terminal;
a second switch S2 coupled between the first intermediate node SW and a ground terminal;
a third switch S3 coupled between the second intermediate node a and the ground terminal;
a first output branch switch SO1 coupled between the second intermediate node a and the first voltage output terminal VO 1;
a second output branch switch SO2 coupled between the second intermediate node a and the second voltage output terminal VO 2;
a first output capacitor C1 coupled between the first voltage output terminal and a ground terminal;
a first output capacitor C2 coupled between the first voltage output terminal and a ground terminal;
a feedback control circuit 126 has inputs coupled to the voltage outputs VO1 and VO2 and outputs coupled to the control terminals of the switches, respectively.
The feedback control circuit 126 in fig. 4 controls the switches to implement the constant voltage and/or constant current charging functions. As shown in fig. 4, the feedback control circuit 126 further includes a current detection unit 1261. The current detection unit can obtain voltage output end VO 1's output current according to second intermediate node A, voltage output end VO 1's voltage difference and the on-resistance on the output branch switch SO1, obtain voltage output end VO 2's output current according to second intermediate node A, voltage output end VO 2's voltage difference and the on-resistance on the output branch switch SO 2.
When the feedback control circuit 126 is in a boost mode for one voltage output end, taking the example that the first voltage output end VO1 is in the boost mode as an example, the feedback control circuit 126 controls the second switch S2 to be normally off, the first switch S1 to be normally on, and the output branch switches SO2 corresponding to the remaining voltage output ends VO2 to be normally off, and controls the third switch S3 and the output branch switch SO1 corresponding to the one voltage output end VO1 to be alternately turned on, and the feedback control circuit 126 adjusts the duty ratio of the corresponding output branch switch SO2 when the corresponding output branch switch SO2 and the third switch S3 are alternately turned on according to the sampled output voltage of the one voltage output end VO1, SO that the output voltage of the one voltage output end VO1 is stabilized at a target voltage, thereby implementing constant-voltage charging of the earphone battery BAT1 by using the fixed target voltage; the feedback control circuit 126 adjusts the duty ratio of the corresponding output branch switch SO2 when the corresponding output branch switch SO2 and the third switch S3 are alternately turned on according to the sampled output current of the voltage output terminal VO1, SO that the output current of the voltage output terminal VO1 is stabilized at a constant target current value, thereby implementing constant current charging of the earphone battery BAT 1. At this time, the output voltage of the one voltage output terminal VO1 is greater than the voltage of the power input terminal VBAT 3.
When the feedback control circuit 126 is in a step-down mode for one voltage output end, taking the example that the first voltage output end VO1 is in the step-down mode as an example, the feedback control circuit 126 controls the output branch switch SO1 corresponding to the one voltage output end VO1 to be normally turned on, the output branch switches SO2 corresponding to the other voltage output ends VO2 to be normally turned off, and the third switch SO 3 to be normally turned off, SO as to control the first switch S1 and the second switch S2 to be alternately turned on, and the feedback control circuit 126 adjusts the duty ratio of the first switch S1 when the first switch S1 and the second switch S2 are alternately turned on according to the sampled output voltage of the one voltage output end VO1, SO that the output voltage of the one voltage output end VO1 is stabilized at a target voltage, and the constant-voltage charging of the earphone battery BAT1 is realized by using the fixed target voltage; the feedback control circuit 126 adjusts the duty ratio of the first switch S1 when the first switch S1 and the second switch S2 are alternately turned on according to the sampled output current of the voltage output terminal VO1, so that the output current of the voltage output terminal VO1 is stabilized at a target current value, and the target current is utilized to implement constant-voltage charging on the earphone battery BAT 1. At this time, the output voltage of the one voltage output terminal VO1 is less than the voltage of the power input terminal VBAT 3.
When the feedback control circuit 126 is in the step-up-down mode for one voltage output end, taking the example that the first voltage output end VO1 is in the step-up-down mode as an example, the feedback control circuit 126 controls the output switch SO2 branches corresponding to the other voltage output ends VO2 to be normally off, controls the first switch S1 and the second switch S2 to be alternately turned on, controls the third switch S3 to be simultaneously turned on when the first switch S1 is turned on, controls the output branch switch SO1 corresponding to the one voltage output end VO1 to be simultaneously turned on when the second switch S2 is turned on, and adjusts the duty ratio of the first switch S1 when the first switch S1 and the second switch S2 are alternately turned on according to the sampled VO1 output voltage of the one voltage output end, SO that the output voltage of the one voltage output end is stabilized at the target voltage, thereby implementing the constant-voltage charging of the earphone battery BAT1 by using the fixed target voltage; the feedback control circuit 126 adjusts the duty ratio of the first switch S1 when the first switch S1 and the second switch S2 are alternately turned on according to the sampled output current of VO1 of the voltage output terminal, so that the output current of the voltage output terminal is stabilized at a target current value, and the target current is used to realize constant-voltage charging of the battery BAT1 of the earphone. At this time, the output voltage of the voltage output terminal VO1 may be smaller than the voltage of the power input terminal VBAT3 or larger than the voltage of the power input terminal VBAT 3.
The principle of the feedback control circuit 126 with charge management function being in the boost mode, buck mode or buck-boost mode for the second voltage output VO2 or other newly added voltage outputs is the same as the principle of being in the boost mode, buck mode or buck-boost mode for the first voltage output VO1, and is not repeated here.
As used herein, the terms "coupled," "connected," "connecting," and the like are intended to refer to an electrical connection, which, unless otherwise indicated, includes a direct connection between two or more circuit objects without any intervening circuit objects, as well as an indirect connection between two or more circuit objects with one or more intervening circuit objects. For example, two circuit objects that are directly connected to each other are said to be "coupled/connected" to each other. Likewise, two circuit objects are also referred to as being "coupled/connected" to each other if one or more intervening circuit objects are connected therebetween. That is, the terms "coupled" and "connected" may be directly electrically connected or indirectly electrically connected, in which other components, such as resistors, capacitors, and the like, are spaced in between.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the present application.
Claims (15)
1. A balance charging method is used for charging management of a first earphone battery of a first wireless earphone and a second earphone battery of a second wireless earphone, and is characterized in that: it comprises the following steps:
acquiring the battery voltage of a first earphone battery and the battery voltage of a second earphone battery;
determining whether a difference between a battery voltage of the first earphone battery and a battery voltage of the second earphone battery exceeds a set balance threshold;
if so, the charging current of the first earphone battery and/or the charging current of the second earphone battery is configured such that the charging current of the earphone battery with the lower battery voltage is larger than the charging current of the earphone battery with the higher battery voltage.
2. The balance charging method according to claim 1, wherein: the configuring of the charging current of the first earphone battery and the charging current of the second earphone battery such that the charging current of the earphone battery with a lower battery voltage is larger than the charging current of the earphone battery with a higher battery voltage comprises:
if the battery voltage of the first earphone battery is lower, configuring the charging current of the first earphone battery and the charging current of the second earphone battery so that the charging current of the first earphone battery is larger than the charging current of the second earphone battery;
if the battery voltage of the first earphone battery is higher, the charging current of the first earphone battery and/or the charging current of the second earphone battery are/is configured so that the charging current of the first earphone battery is smaller than the charging current of the second earphone battery.
3. The balance charging method according to claim 1, wherein: the configuring the charging current of the first earphone battery and/or the charging current of the second earphone battery comprises:
the charging current of the earphone battery with the lower battery voltage is increased or maintained, and the charging current of the earphone battery with the higher battery voltage is maintained or reduced, so that the difference of the charging currents of the two earphone batteries is increased.
4. The balance charging method according to claim 1, wherein: the configuring the charging current of the first earphone battery and/or the charging current of the second earphone battery comprises:
the difference in charging current of the two headset batteries is proportional to the difference in battery voltage of the two headset batteries.
5. The balance charging method according to claim 1, wherein: the first wireless earphone also comprises a first communication unit and a first earphone charging unit, the second wireless earphone also comprises a second communication unit and a second earphone charging unit, the first earphone charging unit provides charging current for the first earphone battery, the second earphone charging unit provides charging current for the second earphone battery, the first wireless earphone and the second wireless earphone are placed in a charging box when charging is needed, the charging box supplies power to the first earphone charging unit of the first wireless earphone and supplies power to the second earphone charging unit of the second wireless earphone,
the first wireless earphone sends the battery voltage of the first earphone battery to an external terminal through a first communication unit, the second wireless earphone sends the battery voltage of the second earphone battery to the external terminal through a second communication unit, the external terminal determines whether the difference value between the battery voltage of the first earphone battery and the battery voltage of the second earphone battery exceeds a set balance threshold value, and when the difference value exceeds the set balance threshold value, a control signal is sent to the first communication unit of the first wireless earphone and the second communication unit of the second wireless earphone, so that the charging current of the first earphone battery and/or the charging current of the second earphone battery are/is configured, and the charging current of the earphone battery with lower battery voltage is larger than the charging current of the earphone battery with higher battery voltage; or,
the first wireless earphone sends the battery voltage of the first earphone battery to the second wireless earphone through the first communication unit, the second wireless earphone sends the battery voltage of the second earphone battery to the first wireless earphone through the second communication unit, each wireless earphone determines whether the difference value of the battery voltages of the two earphone batteries exceeds a set balance threshold value, and when the difference value exceeds the set balance threshold value, the charging current of the first earphone battery and/or the charging current of the second earphone battery are configured, so that the charging current of the earphone battery with the lower battery voltage is larger than the charging current of the earphone battery with the higher battery voltage; or,
the first wireless earphone sends the battery voltage of the first earphone battery to the charging box through the first communication unit, the second wireless earphone sends the battery voltage of the second earphone battery to the charging box through the second communication unit, the charging box forwards the battery voltage of the first earphone battery to the second wireless earphone, and forwards the battery voltage of the second earphone battery to the first wireless earphone, each wireless earphone determines whether the difference value of the battery voltages of the two earphone batteries exceeds a set balance threshold value, and when the difference value exceeds the set balance threshold value, the charging current of the first earphone battery and/or the charging current of the second earphone battery are/is configured, so that the charging current of the earphone battery with lower battery voltage is larger than the charging current of the earphone battery with higher battery voltage.
6. The balance charging method according to claim 5, wherein: when it is determined that the difference between the battery voltage of the first earphone battery and the battery voltage of the second earphone battery exceeds the set balance threshold, in addition to configuring the charging current of the first earphone battery and/or the charging current of the second earphone battery, the charging box is configured to provide the supply voltage of the first earphone charging unit and the supply voltage of the second earphone charging unit to increase the supply voltage of the earphone charging unit for charging the earphone battery with the lower battery voltage and decrease the supply voltage of the earphone charging unit for charging the earphone battery with the higher battery voltage.
7. The balance charging method according to claim 5, wherein:
the first communication unit is a first radio frequency communication unit, the second communication unit is a second radio frequency communication unit, and the communication between the first wireless earphone and the second wireless earphone and the communication with an external terminal or a charging box are wireless communication; or,
the charging box is provided with a third communication unit, a power output end of the charging box is coupled with a power input end of the first wireless earphone, a power output end of the charging box is coupled with a power input end of the second wireless earphone, the third communication unit is coupled with the power output end of the charging box, the first communication unit is coupled with the power input end of the first wireless earphone, the second communication unit is coupled with the power input end of the second wireless earphone, a wired path is established between the power input end of the first wireless earphone and the power input end of the second wireless earphone by means of the power output end of the charging box and/or the third communication unit, the first wireless earphone and the second wireless earphone are communicated through the wired path between the power input end of the first wireless earphone and the power input end of the second wireless earphone, the first wireless earphone and the charging box are communicated through the wired path between the power input end of the first wireless earphone and the power output end of the charging box, and the second wireless earphone and the charging box are communicated through the wired path between the power input end of the second wireless earphone and the power output end of the charging box.
8. The balance charging method according to claim 1, wherein:
the first wireless earphone and the second wireless earphone are placed in a charging box when charging is needed, the charging box comprises a charging box battery and an earphone charging management unit, the earphone charging management unit is provided with a first power output end and a second charging output end, the first power output end of the charging box is coupled with the power input end of the first wireless earphone, the second power output end of the charging box is coupled with the power input end of the second wireless earphone, the power input end of the first wireless earphone is coupled with the first earphone battery, the power input end of the second wireless earphone is coupled with the second earphone battery, the earphone charging management unit carries out charging management on the first earphone battery through the first power output end and the power input end of the first wireless earphone, and the earphone charging management unit carries out charging management on the second earphone battery through the second power output end and the power input end of the second wireless earphone,
the earphone charging management unit acquires the battery voltage of a first earphone battery through a first power output end, acquires the battery voltage of a second earphone battery through a second power output end, determines whether the difference value between the battery voltage of the first earphone battery and the battery voltage of the second earphone battery exceeds a set balance threshold value, and if so, configures the charging current of the first earphone battery output through the first power output end and/or the charging current of the second earphone battery output through the second power output end, so that the charging current of the earphone battery with lower battery voltage is greater than the charging current of the earphone battery with higher battery voltage.
9. A balanced charging circuit, comprising: it includes:
a first wireless earphone including a first earphone battery BAT1;
a second wireless headset including a second headset battery BAT2;
a charging box comprising a charging box battery BAT3 for accommodating the first wireless earphone and the second wireless earphone, and for powering or charging the first wireless earphone and the second wireless earphone,
the method comprises the steps of obtaining the battery voltage of a first earphone battery and the battery voltage of a second earphone battery, and determining whether the difference value between the battery voltage of the first earphone battery and the battery voltage of the second earphone battery exceeds a set balance threshold value; if so, the charging current of the first earphone battery and/or the charging current of the second earphone battery are/is configured such that the charging current of the earphone battery with the lower battery voltage is larger than the charging current of the earphone battery with the higher battery voltage.
10. The balanced charging circuit according to claim 9, wherein: if the battery voltage of the first earphone battery is lower, configuring the charging current of the first earphone battery and the charging current of the second earphone battery so that the charging current of the first earphone battery is larger than the charging current of the second earphone battery; if the battery voltage of the first earphone battery is higher, the charging current of the first earphone battery and/or the charging current of the second earphone battery are/is configured so that the charging current of the first earphone battery is smaller than the charging current of the second earphone battery.
11. The balance charging circuit of claim 9, wherein: the configuring of the charging current of the first earphone battery and/or the charging current of the second earphone battery comprises:
the charging current of the earphone battery with the lower battery voltage is increased or maintained, and the charging current of the earphone battery with the higher battery voltage is maintained or reduced, so that the difference of the charging currents of the two earphone batteries is increased.
12. The balanced charging circuit according to claim 9, wherein:
the first wireless earphone also comprises a first communication unit and a first earphone charging unit, the second wireless earphone also comprises a second communication unit and a second earphone charging unit, the first earphone charging unit provides charging current for the first earphone battery, the second earphone charging unit provides charging current for the second earphone battery, the first wireless earphone and the second wireless earphone are placed in a charging box when charging is needed, the charging box supplies power to the first earphone charging unit of the first wireless earphone and supplies power to the second earphone charging unit of the second wireless earphone,
the first wireless earphone sends the battery voltage of the first earphone battery to an external terminal through a first communication unit, the second wireless earphone sends the battery voltage of the second earphone battery to the external terminal through a second communication unit, the external terminal determines whether the difference value between the battery voltage of the first earphone battery and the battery voltage of the second earphone battery exceeds a set balance threshold value, and when the difference value exceeds the set balance threshold value, a control signal is sent to the first communication unit of the first wireless earphone and the second communication unit of the second wireless earphone, so that the charging current of the first earphone battery and/or the charging current of the second earphone battery are/is configured, and the charging current of the earphone battery with lower battery voltage is larger than the charging current of the earphone battery with higher battery voltage; or,
the first wireless earphone sends the battery voltage of the first earphone battery to the second wireless earphone through the first communication unit, the second wireless earphone sends the battery voltage of the second earphone battery to the first wireless earphone through the second communication unit, each wireless earphone respectively determines whether the difference value of the battery voltages of the two earphone batteries exceeds a set balance threshold value, and when the difference value exceeds the set balance threshold value, the charging current of the first earphone battery and/or the charging current of the second earphone battery are/is configured, so that the charging current of the earphone battery with lower battery voltage is larger than the charging current of the earphone battery with higher battery voltage; or,
the first wireless earphone sends the battery voltage of the first earphone battery to the charging box through the first communication unit, the second wireless earphone sends the battery voltage of the second earphone battery to the charging box through the second communication unit, the charging box forwards the battery voltage of the first earphone battery to the second wireless earphone, and forwards the battery voltage of the second earphone battery to the first wireless earphone, each wireless earphone respectively determines whether the difference value of the battery voltages of the two earphone batteries exceeds a set balance threshold value, and when the difference value exceeds the set balance threshold value, the charging current of the first earphone battery and/or the charging current of the second earphone battery are/is configured, so that the charging current of the earphone battery with the lower battery voltage is larger than the charging current of the earphone battery with the higher battery voltage.
13. The balanced charging circuit according to claim 12, wherein: when it is determined that the difference between the battery voltage of the first earphone battery and the battery voltage of the second earphone battery exceeds the set balance threshold, in addition to configuring the charging current of the first earphone battery and/or the charging current of the second earphone battery, the charging box is configured to provide the supply voltage to the first earphone charging unit and the supply voltage to the second earphone charging unit to increase the supply voltage to the earphone charging unit that charges the earphone battery having a lower battery voltage and decrease the supply voltage to the earphone charging unit that charges the earphone battery having a higher battery voltage.
14. The balanced charging circuit according to claim 12, wherein:
the first communication unit is a first radio frequency communication unit, the second communication unit is a second radio frequency communication unit, and the communication between the first wireless earphone and the second wireless earphone and the communication with an external terminal or a charging box are wireless communication; or,
the charging box is provided with a third communication unit, a power output end of the charging box is coupled with a power input end of the first wireless earphone, a power output end of the charging box is coupled with a power input end of the second wireless earphone, the third communication unit is coupled with the power output end of the charging box, the first communication unit is coupled with the power input end of the first wireless earphone, the second communication unit is coupled with the power input end of the second wireless earphone, a wired path is established between the power input end of the first wireless earphone and the power input end of the second wireless earphone by means of the power output end of the charging box and/or the third communication unit, the first wireless earphone and the second wireless earphone are communicated through the wired path between the power input end of the first wireless earphone and the power input end of the second wireless earphone, the first wireless earphone and the charging box are communicated through the wired path between the power input end of the first wireless earphone and the power output end of the charging box, and the second wireless earphone and the charging box are communicated through the wired path between the power input end of the second wireless earphone and the power output end of the charging box.
15. The balanced charging circuit according to claim 9, wherein:
the first wireless earphone and the second wireless earphone are placed in a charging box when charging is needed, the charging box comprises a charging box battery and an earphone charging management unit, the earphone charging management unit is provided with a first power output end and a second charging output end, the first power output end of the charging box is coupled with the power input end of the first wireless earphone, the second power output end of the charging box is coupled with the power input end of the second wireless earphone, the power input end of the first wireless earphone is coupled with the first earphone battery, the power input end of the second wireless earphone is coupled with the second earphone battery, the earphone charging management unit carries out charging management on the first earphone battery through the first power output end and the power input end of the first wireless earphone, and the earphone charging management unit carries out charging management on the second earphone battery through the second power output end and the power input end of the second wireless earphone,
the earphone charging management unit acquires the battery voltage of a first earphone battery through a first power output end, acquires the battery voltage of a second earphone battery through a second power output end, determines whether the difference value between the battery voltage of the first earphone battery and the battery voltage of the second earphone battery exceeds a set balance threshold value, and if so, configures the charging current of the first earphone battery output through the first power output end and/or the charging current of the second earphone battery output through the second power output end, so that the charging current of the earphone battery with lower battery voltage is greater than the charging current of the earphone battery with higher battery voltage.
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