Charging control method and earphone charging device

Abstract

The invention discloses a charging control method and an earphone charging device. The method is applied to the earphone charging device, the earphone charging device comprises a charging management circuit, a discharging management circuit and a charging bin, the charging management circuit is used for charging and discharging management of the charging bin, and the discharging management circuit is used for charging an earphone battery. The method comprises the following steps: acquiring the current voltage of an earphone battery and the current voltage of a charging bin in a charging process; in response to the fact that the current voltage of the earphone battery is lower than the first voltage and the current voltage of the charging bin is lower than the second voltage, the charging management circuit is closed, the discharging management circuit is opened, and the earphone battery is charged with the current in the constant-current stage of the earphone battery; wherein the current of the earphone battery at the constant current stage is at least twice of the first standard current, and the first standard current is the charging current corresponding to the battery capacity of the earphone battery. In this way, the technical problem that heating is serious when the earphone is charged through a charging bin is solved.

Description

Technical Field

[0001] The present application relates to the field of control, and in particular to a charging control method and an earphone charging device. Background Art

[0002] With the rapid development of science and technology, fast battery charging has been widely used. In the application of devices such as Bluetooth headsets, the charging circuit is generally divided into two parts, one is the charging management circuit of the charging bin, and the other is the discharge management circuit of the charging bin to the headset. When fast charging is performed, high-rate current is generally used for charging. The battery capacity of the charging bin or headset generally corresponds to the standard charging current, and the high-rate current is a current greater than the standard charging current. Due to the internal resistance of the battery and the battery line, the greater the high-rate current, the more heat is generated due to the internal resistance, the greater the power loss, and the greater the heat. When the charging management circuit of the charging bin and the discharge management circuit of the charging bin to the headset are fast charged at the same time, the loss is the greatest and the heat is the most serious. If it is not controlled, it may damage the device itself or even cause a safety accident. Summary of the invention

[0003] The main purpose of this application is to provide a charging control method and an earphone charging device, which can solve the technical problem of serious heat generation when charging earphones using a charging bin.

[0004] In order to solve the above technical problems, the first technical solution adopted by the present application is: to provide a charging control method. The method is applied to an earphone charging device, which includes a charging management circuit, a discharge management circuit and a charging bin, wherein the charging management circuit is used for charging and discharging management of the charging bin, and the discharge management circuit is used for charging the earphone battery. The method includes obtaining the current voltage of the earphone battery and the current voltage of the charging bin during the charging process; in response to the current voltage of the earphone battery being lower than the first voltage, and the current voltage of the charging bin being lower than the second voltage, turning off the charging management circuit and turning on the discharge management circuit, and charging the earphone battery with the constant current phase current of the earphone battery; wherein the constant current phase current of the earphone battery is at least twice the first standard current, and the first standard current is the charging current corresponding to the battery capacity of the earphone battery.

[0005] In order to solve the above technical problems, the second technical solution adopted by the present application is: to provide an earphone charging device. The earphone charging device includes a charging compartment; a charging management circuit, which is used for charging and discharging management of the charging compartment; a discharging management circuit, which is used for charging the earphone battery; a control circuit, which is respectively coupled to the charging management circuit and the discharging management circuit, and is used to obtain the current voltage of the earphone battery and the current voltage of the charging compartment during the charging process; in response to the current voltage of the earphone battery being lower than the first voltage, and the current voltage of the charging compartment being lower than the second voltage, the charging management circuit is turned off and the discharging management circuit is turned on, and the earphone battery is charged with the constant current phase current of the earphone battery; wherein the constant current phase current of the earphone battery is at least twice the first standard current, and the first standard current is the charging current corresponding to the battery capacity of the earphone battery.

[0006] The beneficial effects of the present application are as follows: during the charging process, the current voltage of the headphone battery and the current voltage of the charging bin are obtained. When it is determined that the current voltage of the headphone battery is lower than the first voltage, and the current voltage of the charging bin is lower than the second voltage, it indicates that the power levels of the headphone battery and the charging bin are low. When charging is required, the charging management circuit is turned off, and the charging and discharging of the charging bin are turned off. The discharge management circuit is turned on, and the headphone battery is directly charged using an external power supply. Only the headphone battery is charged using an external power supply, so that the charging bin management circuit does not need to work at the same time, and only the discharge circuit of the headphone is working, thereby avoiding charging of both circuits at the same time, reducing heat generation, and reducing the possibility of excessive heat damaging the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0008] Figure 1 It is a flow chart of the first embodiment of the charging control method of the present application;

[0009] Figure 2 It is a flow chart of the second embodiment of the charging control method of the present application;

[0010] Figure 3 This is a schematic diagram of a charging process of the present application;

[0011] Figure 4 This is a voltage and current schematic diagram of a charging process of the present application;

[0012] Figure 5 The invention is a schematic diagram of a specific structure of an earphone charging device. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0014] The terms "first", "second", etc. in this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0015] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0016] Reference Figure 1 , Figure 1 This is a flow chart of the first embodiment of the charging control method of the present application. The method is applied to an earphone charging device, which includes a charging management circuit, a discharge management circuit and a charging compartment. The charging management circuit is used for charging and discharging management of the charging compartment, and the discharge management circuit is used for charging the earphone battery. The method includes the following steps:

[0017] S11: Obtain the current voltage of the earphone battery and the current voltage of the charging case during charging.

[0018] When the earphone is placed in the earphone charging device and charged by the earphone charging device, the current voltage of the earphone battery and the current voltage of the charging case are obtained during the charging process.

[0019] The voltage of the charging bin can be directly measured by the controller. The voltage of the earphone battery can be directly measured by the controller, or the earphone itself can measure it and then transmit it to the controller using the communication module.

[0020] S12: In response to the current voltage of the headphone battery being lower than the first voltage, and the current voltage of the charging case being lower than the second voltage, the charging management circuit is turned off and the discharge management circuit is turned on to charge the headphone battery with the constant current phase current of the headphone battery; wherein the constant current phase current of the headphone battery is at least twice the first standard current, and the first standard current is a charging current corresponding to the headphone battery capacity.

[0021] When it is determined that the current voltage of the earphone battery is lower than the first voltage, and the current voltage of the charging case is lower than the second voltage, it means that the power of the earphone battery and the charging case are both low. At this time, the charging management circuit is turned off during charging, and the charging case is not charged or discharged. The discharge management circuit is turned on, and the earphone battery is directly charged using an external power supply, so that only the discharge circuit of the earphone is working, and the charging and discharging circuit of the charging case is not working, to avoid excessive heat caused by simultaneous operation.

[0022] The first voltage is a voltage value less than the standard voltage of the headphone battery. The standard voltage of the headphone battery may be the rated voltage of the headphone battery. The second voltage is a voltage value less than the standard voltage of the charging bin. The standard voltage of the charging bin may be the rated voltage of the charging bin.

[0023] The first voltage can be set to a lower operating voltage corresponding to the battery capacity according to actual conditions, so when the battery voltage is at or below this voltage, it indicates that the battery power is low and can be quickly charged with a high rate current. In one embodiment, the first voltage can correspond to the operating voltage when the battery capacity is 20% to 30%.

[0024] The second voltage can be set to a lower operating voltage corresponding to the battery capacity according to the actual situation. Therefore, when the battery voltage is at or below this voltage, it indicates that the battery power is low and can be quickly charged with a high rate current. In one embodiment, the first voltage can correspond to the operating voltage when the charging compartment capacity is 20% to 30%.

[0025] In one embodiment, when the normal operating voltage of the earphone battery is equal to the normal operating voltage of the charging case, that is, the rated voltage of the charging case is equal to the rated voltage of the earphone battery, the first voltage may be equal to the second voltage.

[0026] In one embodiment, the first voltage is between 3V and 3.5V, and the second voltage is between 3V and 3.5V.

[0027] The first standard current is a charging current corresponding to the headphone battery capacity, which is 1C, that is, for example, when the headphone battery capacity is 1000mAh, the first standard current is 1A. In the present application, the headphone battery constant current phase current is a high-rate current compared to the first standard current, and the headphone battery constant current phase current is at least 2C. Charging the headphone with a high-rate current can shorten the charging time.

[0028] In this embodiment, the current voltage of the earphone battery and the current voltage of the charging bin are obtained during the charging process. When it is determined that the current voltage of the earphone battery is lower than the first voltage, and the current voltage of the charging bin is lower than the second voltage, it means that the power of the earphone battery and the charging bin is low. When charging is required, the charging management circuit is turned off, and the charging and discharging of the charging bin is turned off. The discharge management circuit is turned on, and the earphone battery is directly charged using an external power supply. Only the earphone battery is charged using an external power supply, so that the charging bin management circuit does not need to work at the same time, and only the discharge circuit of the earphone is working, which avoids charging work on both sides of the circuit at the same time, reduces heat generation, and reduces the possibility of excessive heat damaging the device.

[0029] In this embodiment, the current voltage of the headphone battery and the current voltage of the charging bin can also be obtained by collecting current. The current voltage of the headphone battery and the current voltage of the charging bin can be further obtained by setting corresponding sampling resistors and obtaining the current of each sampling resistor.

[0030] Reference Figure 2 , Figure 2 This is a flow chart of the second embodiment of the charging control method of the present application. This method is a further extension of the above embodiment, and includes the following steps:

[0031] S21: When the current voltage of the headphone battery reaches the headphone battery constant voltage charging stage voltage, the headphone battery is charged using the headphone battery constant voltage stage current, wherein the headphone battery constant current stage current is less than the headphone battery constant current stage current.

[0032] Battery charging usually includes four stages, namely, the pre-charging stage, the constant current charging stage, the constant voltage charging stage and the stop charging stage. The above steps are steps implemented after the constant current stage. In the process of directly charging the headphone battery with an external power supply, the headphone battery is charged with the headphone battery constant current stage current, and the headphone battery constant current stage current is at least twice the first standard current. In the process of charging with the headphone battery constant current stage current, the headphone battery voltage continues to rise, and after a period of time, it reaches the headphone constant voltage charging stage voltage and enters the constant voltage state.

[0033] In the constant voltage state, the voltage of the headphone battery is basically stable, because the controller will set a constant charging voltage at the positive and negative poles of the headphone battery to charge the headphone. The charging voltage is generally larger than the maximum electromotive force of the headphone battery, and the ratio of the charging voltage to the maximum electromotive force of the battery can usually be 100% to 120%. The headphone battery voltage at constant voltage can be considered as the maximum electromotive force of the battery, which can be the rated voltage. During constant voltage charging, the charging current of the battery is used as the constant voltage stage current of the headphone battery. The constant voltage stage current of the headphone battery is a current that decreases continuously with the increase of the constant voltage charging time. The constant voltage stage current of the headphone battery starts to decrease continuously from the current value corresponding to the constant current stage current of the headphone battery.

[0034] S22: In response to the current voltage of the headphone battery reaching the constant voltage charging stage voltage of the headphone battery, the constant voltage stage current of the headphone battery is less than the preset current, and the charging management circuit is turned on to charge the charging case with the constant current stage current of the charging case; wherein the constant current stage current of the charging case is at least twice the second standard current, and the second standard current is a charging current corresponding to the battery capacity of the charging case.

[0035] When the current of the earphone battery in the constant voltage stage decreases to less than the preset current, it can be considered that the earphone battery is basically full or charged, and the charging compartment can be charged. The preset current is less than or equal to twice the first standard current. The preset current is the current corresponding to the stop charging stage.

[0036] In this embodiment, the headphone battery is first charged with a constant current. After the headphone battery voltage increases to reach the constant voltage stage voltage and enters the constant voltage stage, constant voltage charging begins. During constant voltage charging, the current of the headphone battery in the constant voltage stage is continuously reduced. When the current of the headphone battery in the constant voltage stage is less than the preset current, it means that the headphone battery is full, and the charging compartment is started to be charged at this time. When a high-rate current is used for fast charging, only the external current is used to charge the headphone battery first, and the charging compartment is not charged, nor is the headphone battery charged using the charging compartment. The working circuits working at a high-rate current at the same time are reduced, thereby reducing heat generation and protecting the circuit.

[0037] Furthermore, in one embodiment, when charging the charging bin, the charging bin is also quickly charged with a high-rate current, the charging bin is charged with a constant current phase current of the charging bin, and when the charging bin voltage reaches the constant voltage charging phase voltage of the charging bin, the charging bin is charged with a constant voltage phase current of the charging bin, wherein the constant current phase current of the charging bin is at least twice the second standard current, the second standard current is a charging current corresponding to the battery capacity of the charging bin, and the constant voltage phase current of the charging bin is less than the constant current phase current of the charging bin.

[0038] Similarly, when the charging bin is charged using the current in the constant voltage phase of the charging bin, the voltage of the battery in the charging bin continues to rise, and after a period of time, the charging bin reaches a constant voltage state. In the constant voltage state, the voltage of the battery in the charging bin is basically stable, because the controller sets a constant charging voltage at the positive and negative poles of the battery in the charging bin to charge the charging bin.

[0039] In one embodiment, if the current voltage of the headphone battery is lower than the first voltage and the current voltage of the charging case is higher than the second voltage, the headphone battery is first charged with the headphone battery using only the constant current phase current of the headphone battery using an external power source, and when the current voltage of the headphone battery reaches the constant voltage charging phase voltage of the charging case, the headphone battery is charged using the constant voltage phase current of the headphone battery; in response to the current voltage of the headphone battery reaching the constant voltage charging phase voltage of the charging case, the constant voltage phase current of the headphone battery is less than the preset current, and then the charging case is charged.

[0040] When the earphone battery is lower than the first voltage and the charging case voltage is higher than the second voltage, it means that the charge in the earphone battery is low, and the charging case is not charged or discharged, and the earphone is only charged with an external power supply. When the earphone battery is charged with a high-rate constant current phase current of the earphone battery, the charging of the charging case and the charging circuit of the charging case to the earphone battery do not work, thereby reducing heat generation.

[0041] Alternatively, the charging case can be charged with a second standard current while the headphone battery is being charged with the constant current phase current. Since less heat is generated when charging with the standard current, the charging time of the charging case can be advanced by adding less heat, thereby increasing the overall charging speed of the headphone charging device.

[0042] In one embodiment, if the current voltage of the earphone battery is higher than the first voltage and the current voltage of the charging case is lower than the second voltage, the charging case is charged with the constant voltage phase current of the earphone battery, and when the charging case voltage reaches the first voltage, the charging case is charged with the constant current phase current of the charging case.

[0043] When the earphone battery voltage is higher than the first voltage and the charging case voltage is lower than the second voltage, it means that the power of the charging case is low. The charging case is first charged at a high rate with the constant current stage current of the charging case. When the voltage of the charging case rises to the constant voltage charging stage voltage of the charging case, constant voltage charging is used instead, and the charging case is charged with the constant voltage stage current of the charging case.

[0044] The charging of the earphone battery can be performed by charging the earphone battery with a first standard current when the charging case is charged with a constant voltage phase current of the earphone battery, or by not charging the earphone battery when the charging case is charged with a constant voltage phase current of the earphone battery, and charging the earphone battery with the first standard current only when the charging case is charged with a constant current phase current of the charging case.

[0045] At the same time, the overall charging speed is increased at the expense of increased heat. When charging the earphone battery in the constant voltage stage of the charging case, the heat dissipation is reduced at the expense of charging speed.

[0046] In one embodiment, if the current voltage of the headphone battery is higher than the first voltage and lower than the constant-voltage charging stage voltage of the headphone battery, and the current voltage of the charging case is higher than the second voltage and lower than the constant-voltage charging stage voltage of the charging case, the charging case is controlled to charge the headphone battery with the first standard current, and to charge the charging case with the second standard current.

[0047] When the headphone battery voltage is higher than the first voltage and the charging case voltage is higher than the second voltage, it indicates that the remaining power in the battery is high and high-rate charging is not required. The first standard current and the second standard current can be used for charging. When the headphone battery or the charging case voltage reaches the second voltage, constant voltage charging starts again, charging the headphone battery with the headphone battery constant voltage stage current and charging the charging case with the charging case constant current stage current.

[0048] The technical solution used in the present application is that, for the entire circuit structure, at a certain moment, the heat dissipated by this charging method is less than the heat dissipated by the high-rate charging method at the same time, thereby reducing the maximum dissipated heat and thus reducing the maximum temperature of the circuit structure.

[0049] The technical solution of the present application is described in more detail by taking a specific embodiment as an example below.

[0050] like Figure 3 As shown, Figure 3 This is a schematic diagram of a charging process for this application.

[0051] Put the earphones into the earphone charging device, connect the power supply to the earphone charging device to start charging. Detect the earphone battery voltage and the charging case voltage. Assuming that the first voltage and the second voltage are both 3.5V, the voltage entering the constant voltage stage is 4V. When charging the earphone battery or the charging case battery with a constant current, a high rate current is used, such as 5 times the standard current, 5C.

[0052] When it is detected that the voltage of the earphone battery and the charging case battery are both lower than 3.5V, the charging management circuit is turned off, the charging case is not charged or discharged, and the discharge management circuit is turned on to charge the earphone directly using an external power supply, so that only the discharge circuit for the earphone is working and the charging circuit of the charging case is not working. In the constant current stage of the earphone, the earphone battery is quickly charged with a high rate current, such as a current of 5C1. 3.5V corresponds to the voltage when the capacity of the earphone battery or the charging case battery remains at 30%. C1 is the first standard current corresponding to the capacity of the earphone battery.

[0053] When the headphone battery voltage is greater than the headphone constant voltage charging stage voltage of 4V, the headphone battery charging enters the constant voltage stage. At this time, the current charging the headphone battery, that is, the headphone battery constant voltage stage current, that is, the current of the discharge management circuit will continue to decrease. Detect whether the headphone battery constant voltage stage current that charges the headphone battery drops to the preset current 2C1. In response to the headphone battery constant voltage stage current being less than the preset current 2C1, turn on the charging management circuit and start charging the charging bin. The charging process of the charging bin is similar to that of the headphone battery. First, in the constant current stage of the charging bin, the charging bin is quickly charged with a high rate current, such as 5C2. Then, when the charging bin voltage is greater than 4V, it enters the constant voltage stage. When the charging bin constant voltage stage current is less than the preset current 2C2, it is considered that the charging bin is full, and charging stops. C2 is the second standard current corresponding to the battery capacity of the charging bin.

[0054] When it is detected that the earphone voltage is lower than 3.5V and the charging bin voltage is higher than 3.5V, the earphone battery can be quickly charged with the constant current stage current 5C1 of the earphone battery. When the earphone battery voltage is greater than the second voltage and the constant voltage stage current of the earphone battery is less than the preset current 2C1, the charging bin starts to be charged. At this time, the charging bin can be charged with a low rate current, C2.

[0055] When it is detected that the headset voltage is higher than 3.5V and the charging bin voltage is lower than 3.5V, the charging bin can be charged at a high rate with the constant current stage current 5C2 of the charging bin, and when the voltage of the charging bin rises to the constant voltage charging stage voltage of the charging bin, the charging bin is charged with the constant voltage stage current of the charging bin. The headset can be charged with the first standard current C1, and can be charged simultaneously with the charging bin, or the headset can be charged while the charging bin is charged with the constant voltage stage current of the charging bin.

[0056] For further understanding, refer to Figure 4 , Figure 4It is a schematic diagram of voltage and current in the charging process. It can be used as a schematic diagram of the current and voltage changes of the headphone battery or charging compartment when charging at a high rate. Its complete charging process includes the pre-charging stage, the constant current stage, the constant voltage stage and the completion of charging. Assuming that the headphone battery is charged at this time, the pre-charging stage is generally charged with a lower current. When the constant current stage voltage threshold is reached, the constant current stage is entered. At this time, the charging is performed with a high-rate constant current stage current. The voltage of the headphone battery continues to rise in the constant current stage. When it rises to the constant voltage stage voltage threshold, the headphone charging enters the constant voltage stage. At this time, the headphone battery voltage is basically stable, and the charging current begins to decrease. When the current in the headphone constant voltage stage drops to a certain level, such as one times the standard current or two times the standard current, the headphone battery is considered to be full. At this time, the circuit is closed and the charging of the headphone is stopped.

[0057] An embodiment of an earphone charging device is given below to illustrate the earphone charging device of the present application in detail.

[0058] The earphone charging device of the present application includes a charging case, a charging management circuit, a discharge management circuit and a control circuit, which are respectively coupled to the charging management circuit and the discharge management circuit.

[0059] The charging management circuit is used for charging and discharging management of the charging case, the discharge management circuit is used to charge the earphone battery, the control circuit is used to obtain the current voltage of the earphone battery and the current voltage of the charging case during the charging process, and is also used to control the opening and closing of the charging management circuit and the discharge management circuit.

[0060] Before the earphone charging device starts charging the earphone battery, the control circuit obtains the earphone battery voltage and the charging bin voltage. In response to the current voltage of the earphone battery being lower than the first voltage and the current voltage of the charging bin being lower than the second voltage, the charging management circuit is turned off and the discharge management circuit is turned on to charge the earphone battery with the constant current phase current of the earphone battery; wherein the constant current phase current of the earphone battery is at least twice the first standard current, and the first standard current is the charging current corresponding to the battery capacity of the earphone battery.

[0061] In one embodiment, the control circuit is further used to charge the headphone battery with the headphone battery constant current phase current after charging the headphone battery with the headphone battery constant current phase current, when the current voltage of the headphone battery reaches the headphone battery constant voltage charging phase voltage, wherein the headphone battery constant voltage phase current is less than the headphone battery constant current phase current.

[0062] Furthermore, the control circuit is also used to, after the headphone battery is charged with the constant voltage stage current of the headphone battery, in response to the current voltage of the headphone battery reaching the constant voltage charging stage voltage of the headphone battery, and the constant voltage stage current of the headphone battery being less than a preset current, start the charging management circuit to charge the charging bin with the constant current stage current of the charging bin; wherein the constant current stage current of the charging bin is at least twice the second standard current, the second standard current is the charging current corresponding to the battery capacity of the charging bin, and the preset current is less than or equal to twice the first standard current.

[0063] Furthermore, the control circuit is also used to charge the charging bin with the constant current phase current of the charging bin after the charging management circuit is turned on. When the charging bin voltage reaches the constant voltage charging phase voltage of the charging bin, the constant voltage phase current of the charging bin is used to charge the charging bin, and the constant voltage phase current of the charging bin is less than the constant current phase current of the charging bin.

[0064] In one embodiment, if the current voltage of the headphone battery is lower than the first voltage and the current voltage of the charging case is higher than the second voltage, the control circuit is used to first use an external power supply to charge the headphone battery only with the constant current phase current of the headphone battery, and when the current voltage of the headphone battery reaches the constant voltage charging phase voltage of the headphone battery, use the constant voltage phase current of the headphone battery to charge the headphone battery; in response to the current voltage of the headphone battery reaching the constant voltage charging phase voltage of the charging case, the constant voltage phase current of the headphone battery is less than a preset current, and then the charging case is charged; wherein, the constant current phase current of the headphone battery is at least twice the first standard current, the constant voltage phase current of the headphone battery is less than the constant current phase current of the headphone battery, and the preset current is less than or equal to twice the first standard current.

[0065] In another embodiment, if the current voltage of the earphone battery is higher than the first voltage and the current voltage of the charging case is lower than the second voltage, the control circuit is used to charge the charging case with the constant current phase current of the charging case, and when the charging case enters the constant voltage phase, the charging case is charged with the constant voltage phase current of the charging case; wherein the constant current phase current of the charging case is at least twice the second standard current, and the constant voltage phase current of the charging case is less than the constant current phase current of the charging case.

[0066] In another embodiment, if the current voltage of the headphone battery is higher than the first voltage and lower than the voltage of the headphone battery in the constant-voltage charging stage, and the current voltage of the charging case is higher than the second voltage and lower than the voltage of the charging case in the constant-voltage charging stage, the control circuit is used to control the charging case to charge the headphone battery with a first standard current and to charge the charging case with a second standard current.

[0067] In one embodiment, the control circuit, the charging management circuit and the discharge management circuit can be arranged together as a controller or a control unit to implement the functions of the above-mentioned circuits. The control circuit, the charging management circuit and the discharge management circuit jointly implement the method provided by any embodiment and possible combination of the above-mentioned charging control method of the present application.

[0068] like Figure 5 As shown, Figure 5 The figure is a schematic diagram of the specific structure of an earphone charging device.

[0069] Among them, MCU is a microcontroller unit, which is used as a central processing unit. OVP is overvoltage protection. RC filtering is used to smooth the signal. Boost is a boost circuit. The circuit from TYPE C or wireless charging ICNU 1680 to the charging bin is a charging management circuit, which is used to manage the charging and discharging of the charging bin. The circuit from TYPE C or wireless charging ICNU 1680 to the L-side and R-side pins (earphone battery pins) is a discharge management circuit, which is used to manage the charging of the earphone battery.

[0070] In summary, during the charging process, the current voltage of the earphone battery and the current voltage of the charging bin are obtained. When it is determined that the current voltage of the earphone battery is lower than the first voltage, and the current voltage of the charging bin is lower than the second voltage, it means that the power of the earphone battery and the charging bin is low. When charging is required, the external power supply is used to charge only the earphone battery. By using the external power supply to charge only the earphone battery first, the charging bin management circuit does not need to work at the same time, and only the discharge circuit of the earphone is working, which avoids the circuits on both sides from charging at a high rate current at the same time, reduces the generation of heat, and reduces the possibility of excessive heat damaging the device.

[0071] In the several embodiments provided in this application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the device implementation described above is only illustrative, for example, the division of the modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0072] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0073] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0074] If the integrated units in the above other embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, RandomAccess Memory), disk or optical disk and other media that can store program codes.

[0075] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A charging control method, characterized in that: Applied to an earphone charging device, the earphone charging device includes a charging management circuit, a discharge management circuit and a charging compartment, the charging management circuit is used for charging and discharging management of the charging compartment, the discharge management circuit is used for charging an earphone battery, and the method includes: Obtaining the current voltage of the earphone battery and the current voltage of the charging compartment during charging; In response to the current voltage of the earphone battery being lower than the first voltage and the current voltage of the charging compartment being lower than the second voltage, turning off the charging management circuit and turning on the discharge management circuit to charge the earphone battery with the constant current phase current of the earphone battery; The current of the headphone battery in the constant current stage is at least twice the first standard current, and the first standard current is the charging current corresponding to the battery capacity of the headphone battery.

2. The method according to claim 1, characterized in that After charging the earphone battery with the constant current phase current of the earphone battery, the method comprises: When the current voltage of the headphone battery reaches the headphone battery constant voltage charging stage voltage, the headphone battery is charged using the headphone battery constant voltage stage current, wherein the headphone battery constant voltage stage current is smaller than the headphone battery constant current stage current.

3. The method according to claim 2, characterized in that After charging the earphone battery by using the current in the constant voltage phase of the earphone battery, the method includes: In response to the current voltage of the earphone battery reaching the constant voltage charging stage voltage of the earphone battery, and the constant voltage stage current of the earphone battery being less than a preset current, the charging management circuit is turned on to charge the charging bin with the constant current stage current of the charging bin; Among them, the current of the charging bin in the constant current stage is at least twice the second standard current, and the second standard current is the charging current corresponding to the battery capacity of the charging bin.

4. The method according to claim 3, characterized in that The preset current is less than or equal to twice the first standard current.

5. The method according to claim 3, characterized in that: After the charging management circuit is turned on to charge the charging bin with the charging bin constant current phase current, the method includes: When the voltage of the charging bin reaches the voltage of the constant voltage charging stage of the charging bin, the charging bin is charged using the constant voltage stage current of the charging bin, and the constant voltage stage current of the charging bin is smaller than the constant current stage current of the charging bin.

6. The method according to claim 1, characterized in that The method further comprises: If the current voltage of the headphone battery is lower than the first voltage, and the current voltage of the charging bin is higher than the second voltage, firstly, the headphone battery is charged with only the headphone battery constant current phase current by using an external power source, and when the current voltage of the headphone battery reaches the headphone battery constant voltage charging phase voltage, the headphone battery is charged with the headphone battery constant voltage phase current; in response to the current voltage of the headphone battery reaching the charging bin constant voltage charging phase voltage, and the headphone battery constant voltage phase current is less than the preset current, the charging bin is charged again; Among them, the current of the headphone battery constant current stage is at least twice the first standard current, the current of the headphone battery constant voltage stage is less than the current of the headphone battery constant current stage, and the preset current is less than or equal to twice the first standard current.

7. The method according to claim 1, characterized in that The method further comprises: If the current voltage of the earphone battery is higher than the first voltage and the current voltage of the charging bin is lower than the second voltage, the charging bin is charged with the current of the constant current phase of the charging bin, and when the charging bin enters the constant voltage phase, the charging bin is charged with the current of the constant voltage phase of the charging bin; Among them, the current of the charging warehouse in the constant current stage is at least twice the second standard current, and the current of the charging warehouse in the constant voltage stage is smaller than the current of the charging warehouse in the constant current stage.

8. The method according to claim 1, characterized in that The method further comprises: If the current voltage of the headphone battery is higher than the first voltage and lower than the constant-voltage charging stage voltage of the headphone battery, and the current voltage of the charging bin is higher than the second voltage and lower than the constant-voltage charging stage voltage of the charging bin, control the charging bin to charge the headphone battery with the first standard current and charge the charging bin with the second standard current.

9. The method according to claim 1, characterized in that: The first voltage is between 3V and 3.5V, and the second voltage is between 3V and 3.5V.

10. An earphone charging device, characterized in that: The earphone charging device comprises: Charging compartment; A charging management circuit, which is used for charging and discharging management of the charging compartment; A discharge management circuit, wherein the discharge management circuit is used to charge the earphone battery; a control circuit, coupled to the charging management circuit and the discharging management circuit respectively, for obtaining a current voltage of the earphone battery and a current voltage of the charging bin during charging; in response to the current voltage of the earphone battery being lower than a first voltage, and the current voltage of the charging bin being lower than a second voltage, turning off the charging management circuit and turning on the discharging management circuit, so as to charge the earphone battery with a constant current phase current of the earphone battery; The current of the headphone battery in the constant current stage is at least twice the first standard current, and the first standard current is the charging current corresponding to the battery capacity of the headphone battery.

11. The earphone charging device according to claim 10, characterized in that: The control circuit is also used to charge the headphone battery with the headphone battery constant voltage stage current after charging the headphone battery with the headphone battery constant current stage current, when the current voltage of the headphone battery reaches the headphone battery constant voltage charging stage voltage, wherein the headphone battery constant voltage stage current is less than the headphone battery constant current stage current.

12. The earphone charging device according to claim 11, characterized in that: The control circuit is also used to, after the headphone battery is charged with the constant voltage stage current of the headphone battery, in response to the current voltage of the headphone battery reaching the constant voltage charging stage voltage of the headphone battery, and the constant voltage stage current of the headphone battery being less than a preset current, turn on the charging management circuit to charge the charging bin with the constant current stage current of the charging bin; wherein the constant current stage current of the charging bin is at least twice the second standard current, the second standard current is the charging current corresponding to the battery capacity of the charging bin, and the preset current is less than or equal to twice the first standard current.

13. The earphone charging device according to claim 12, characterized in that: The control circuit is also used to charge the charging bin with the constant current phase current of the charging bin after the charging management circuit is turned on. When the voltage of the charging bin reaches the constant voltage charging phase voltage of the charging bin, the charging bin is charged with the constant voltage phase current of the charging bin, and the constant voltage phase current of the charging bin is less than the constant current phase current of the charging bin.

14. The earphone charging device according to claim 10, characterized in that: The control circuit is further configured to, in response to the current voltage of the headphone battery being lower than the first voltage and the current voltage of the charging bin being higher than the second voltage, first use an external power source to charge the headphone battery only with the headphone battery constant current stage current, and when the current voltage of the headphone battery reaches the headphone battery constant voltage charging stage voltage, use the headphone battery constant voltage stage current to charge the headphone battery; In response to the current voltage of the headphone battery reaching the constant voltage charging stage voltage of the charging case, the constant voltage stage current of the headphone battery is less than the preset current, and then the charging case is charged; wherein the constant current stage current of the headphone battery is at least twice the first standard current, the constant voltage stage current of the headphone battery is less than the constant current stage current of the headphone battery, and the preset current is less than or equal to twice the first standard current.

15. The earphone charging device according to claim 10, characterized in that: The control circuit is also used to, in response to the current voltage of the earphone battery being higher than the first voltage and the current voltage of the charging case being lower than the second voltage, charge the charging case with the constant current phase current of the charging case, and when the charging case enters the constant voltage phase, charge the charging case with the constant voltage phase current of the charging case; wherein the constant current phase current of the charging case is at least twice the second standard current, and the constant voltage phase current of the charging case is less than the constant current phase current of the charging case.

16. The earphone charging device according to claim 10, characterized in that: The control circuit is also used to control the charging bin to charge the headphone battery with a first standard current and to charge the charging bin with a second standard current in response to the current voltage of the headphone battery being higher than the first voltage and lower than the constant-voltage charging stage voltage of the headphone battery, and the current voltage of the charging bin being higher than the second voltage and lower than the constant-voltage charging stage voltage of the charging bin.

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