A high-power sound box based on hybrid power supply and a power supply method for improving power of the sound box

Abstract

The application discloses a high-power sound box based on hybrid power supply and a power supply method for improving the power of the sound box. The power management module is simultaneously provided with a battery power supply unit and a power supply unit to supply power for the power amplifier unit. When the sound box works, the audio input unit receives input audio, and the power amplifier unit amplifies the audio signal, and the loudspeaker is driven to sound by the amplified audio signal. The FET control unit in the power management module automatically switches its conduction state according to the required power amplifier power of the power amplifier unit and the corresponding system voltage change of the power amplifier unit, adjusts the power supply state of the battery power supply unit and the power supply unit, and dynamically supplies power for the power amplifier unit to meet the high-power output of the sound box. The power supply method is suitable for the above-mentioned high-power sound box, and the above-mentioned high-power sound box realizes the high-power output exceeding the power supply power under the condition that the power supply voltage of the power supply unit is unchanged.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of sound boxes, and in particular to a high-power sound box based on hybrid power supply and a power supply method for improving the power of a sound box. BACKGROUND

[0002] A sound box refers to a device that can convert an audio signal into sound. It has a power amplifier (also referred to as a power amplifier unit) inside, which amplifies the audio signal and drives the loudspeaker to make sound, making the sound larger.

[0003] Currently, sound boxes can be divided into USB sound boxes and sound boxes with adapters powered by mains electricity according to the power supply mode. Among them, a USB sound box is a sound box device that uses USB power supply, receives audio signals through Bluetooth or a 3.5 interface, and plays the audio signals. It mainly consists of a power module, a sound input module, a power amplifier module, and a loudspeaker. After the sound signal is input, the power amplifier module amplifies the sound signal and drives the loudspeaker to emit sound. When amplifying the sound signal, the power amplifier module needs to consume a large amount of power. In order to facilitate use, the USB sound box uses a USB interface for power supply and can work directly by being plugged into the USB interface of a computer. According to the standard of the USB interface, the maximum current that can be output by an ordinary USB interface is 5V and 1.2A; that is, the maximum output power of a USB sound box is usually only 6W, so that the volume and sound quality of the USB sound box are greatly limited. Although there are various USB fast charging technologies that can greatly improve the power supply capacity of USB, the fast charging technology standards are different, and ordinary computer USB interfaces do not support any fast charging, so USB fast charging technology cannot be used to solve the power bottleneck of USB sound box power supply.

[0004] A sound box with an adapter powered by mains electricity can provide any power through the external 220V mains electricity, and there is no power bottleneck, but the price of the adapter in the sound box increases with the increase of the corresponding power, resulting in a high manufacturing cost of the high-power sound box. For example, an 18W sound box needs to be configured with an 18W adapter, and the price of an 18W adapter is about 18 yuan. A 36W sound box needs to be configured with a 36W adapter, and the price of a 36W adapter is about 36 yuan. Therefore, how to use a small-power adapter to support the work of a high-power sound box to reduce the cost and solve the power bottleneck of the adapter for the sound box has become a problem that people are concerned about.

[0005] Therefore, how to develop a method for improving the power of a sound box and a high-power sound box has become a problem that people need to solve. SUMMARY

[0006] In view of this, the application discloses a high-power sound box based on hybrid power supply and a power supply method for improving the power of the sound box to solve the problem that the volume and sound quality of the USB sound box are limited by the power, and the sound box powered by the commercial power is limited by the power of the adapter, resulting in high manufacturing cost of the sound box.

[0007] In one aspect, the application provides a high-power sound box based on hybrid power supply, comprising an audio input unit, a power amplifier unit, a loudspeaker and a power management module.

[0008] The audio input unit is configured to receive an input audio signal.

[0009] The input end of the power amplifier unit is connected to the output end of the audio input unit, configured to receive the audio signal output by the audio input unit and amplify the audio signal.

[0010] The input end of the loudspeaker is connected to the output end of the power amplifier unit, and the loudspeaker is driven to sound by the amplified audio signal output by the power amplifier unit.

[0011] The power management module comprises a power supply unit, a battery power supply unit and a FET control unit.

[0012] The input end of the power supply unit is connected to an external power source.

[0013] The battery power supply unit and the FET control unit are connected in series and connected to the output end of the power supply unit.

[0014] The power management module automatically switches the conduction state of the FET control unit according to the required power amplifier power of the power amplifier unit and the corresponding system voltage change of the power amplifier unit, adjusts the working state of the battery power supply unit and the power supply unit, and dynamically supplies power to the power amplifier unit.

[0015] Preferably, the conduction state of the FET control unit includes forward conduction, reverse conduction and non-conduction.

[0016] Further preferably, the power management module automatically switches the conduction state of the FET control unit according to the required power amplifier power of the power amplifier unit and the corresponding system voltage change of the power amplifier unit, adjusts the working state of the battery power supply unit and the power supply unit, and dynamically supplies power to the power amplifier unit, specifically:

[0017] When the power amplifier power required by the power amplifier unit is less than the power supply power, and the voltage difference between the system voltage corresponding to the power amplifier unit and the voltage of the battery power supply unit is greater than or equal to the conduction threshold of the FET control unit, the FET control unit is forwardly conducted, and the power supply power supply unit supplies power to the power amplifier unit while charging the battery power supply unit;

[0018] When the power amplifier power required by the power amplifier unit is less than the power supply power, and the voltage difference between the system voltage corresponding to the power amplifier unit and the voltage of the battery power supply unit is less than the conduction threshold of the FET control unit, the FET control unit is not conducted, and the power supply power supply unit only supplies power to the power amplifier unit;

[0019] When the power amplifier power required by the power amplifier unit is greater than or equal to the power supply power, and the voltage difference between the system voltage corresponding to the power amplifier unit and the voltage of the battery power supply unit is greater than or equal to the conduction threshold of the FET control unit, the FET control unit is reversely conducted, and the power supply power supply unit and the battery power supply unit supply power to the power amplifier unit at the same time.

[0020] Further preferably, the large-power audio amplifier based on hybrid power supply further comprises a power supply detection unit;

[0021] The input end of the power supply detection unit is connected with the input port of the power supply power supply unit, for detecting whether there is a power supply current input to the power supply power supply unit, and the output end of the power supply detection unit is connected with the control end of the power amplifier unit, and the power supply detection unit controls whether the power amplifier unit is allowed to start according to the detected state of the external power supply current input to the power supply power supply unit.

[0022] Further preferably, the large-power audio amplifier is a USB audio amplifier or an audio amplifier supplied by a commercial power supply with an adapter.

[0023] On the other hand, the application also provides a power supply method for improving the power of an audio amplifier based on hybrid power supply, wherein the audio amplifier is provided with a battery power supply unit and a power supply power supply unit supplied by an external power supply at the same time;

[0024] The power supply method comprises the following steps:

[0025] An audio signal input to the audio amplifier is acquired, and a current value corresponding to the audio signal is detected;

[0026] The power amplifier power required by the audio amplifier is calculated according to the current value corresponding to the audio signal and the power amplifier multiple of the audio amplifier;

[0027] The system voltage corresponding to the power amplifier unit in the audio amplifier and the voltage of the battery power supply unit in the audio amplifier are detected in real time;

[0028] According to the power amplifier power required by the sound box, the system voltage corresponding to the power amplifier unit in the sound box, and the voltage of the battery power supply unit in the sound box, the working state of the battery power supply unit and the power supply unit is controlled, and dynamic power supply is performed for the power amplifier unit in the sound box.

[0029] Preferably, the power supply method for improving the power of the sound box according to the power amplifier power required by the sound box, the system voltage corresponding to the power amplifier unit in the sound box, and the voltage of the battery power supply unit in the sound box, the working state of the battery power supply unit and the power supply unit is controlled, and dynamic power supply is performed for the power amplifier unit in the sound box, specifically:

[0030] The power required by the sound box is compared with the rated power amplifier power of the sound box to obtain a power comparison result;

[0031] The system voltage corresponding to the power amplifier unit in the sound box and the voltage of the battery power supply unit in the sound box are compared to obtain a voltage comparison result;

[0032] According to the power comparison result and the voltage comparison result, the working state of the battery power supply unit and the power supply unit is controlled, and dynamic power supply is performed for the power amplifier unit in the sound box.

[0033] Further preferably, the power supply method for improving the power of the sound box according to the power comparison result and the voltage comparison result, the working state of the battery power supply unit and the power supply unit is controlled, and dynamic power supply is performed for the power amplifier unit in the sound box, specifically:

[0034] When the power amplifier power required by the sound box is less than the rated power amplifier power of the sound box, and the voltage difference between the system voltage corresponding to the power amplifier unit in the sound box and the voltage of the battery power supply unit is greater than or equal to a threshold value, the power supply unit is controlled to supply power to the power amplifier unit in the sound box while charging the battery power supply unit;

[0035] When the power amplifier power required by the sound box is less than the rated power amplifier power of the sound box, and the voltage difference between the system voltage corresponding to the power amplifier unit in the sound box and the voltage of the battery power supply unit is less than a threshold value, the power supply unit is controlled to supply power only to the power amplifier unit in the sound box;

[0036] When the power amplifier power required by the sound box is greater than or equal to the rated power amplifier power of the sound box, and the voltage difference between the system voltage corresponding to the power amplifier unit in the sound box and the voltage of the battery power supply unit is greater than or equal to a threshold value, the power supply unit and the battery power supply unit are controlled to supply power to the power amplifier unit in the sound box.

[0037] Further preferably, the power supply method for improving the power of the sound box based on hybrid power supply further comprises the following steps:

[0038] Detecting the input power supply current of the power supply unit in the sound box, when the input power supply current is greater than the current threshold, the power amplifier unit in the sound box is allowed to start, otherwise the power amplifier unit in the sound box is not allowed to start.

[0039] Further preferably, the sound box is a USB sound box or a sound box powered by a mains adapter.

[0040] The power supply method for improving the power of the sound box based on the hybrid power supply provided by the application controls the working state of the battery power supply unit and the power supply unit according to the required power amplifier power of the sound box, the system voltage corresponding to the power amplifier unit in the sound box and the voltage of the battery power supply unit in the sound box, and dynamically supplies power to the power amplifier unit in the sound box.

[0041] The power supply method for improving the power of the sound box based on the hybrid power supply provided by the application controls the working state of the battery power supply unit and the power supply unit according to the required power amplifier power of the sound box, the system voltage corresponding to the power amplifier unit in the sound box and the voltage of the battery power supply unit in the sound box, and dynamically supplies power to the power amplifier unit in the sound box.

[0042] The power supply method for improving the power of the sound box based on the hybrid power supply provided by the application controls the working state of the battery power supply unit and the power supply unit according to the required power amplifier power of the sound box, the system voltage corresponding to the power amplifier unit in the sound box and the voltage of the battery power supply unit in the sound box, and dynamically supplies power to the power amplifier unit in the sound box.

[0043] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0044] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and serve to explain the principles of the present application.

[0045] In order to more clearly demonstrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0046] Figure 1 A composition module schematic diagram of a high-power sound box based on hybrid power supply is provided for the disclosed embodiments of the present application.

[0047] Figure 2 A flowchart of a power supply method for improving the power of a sound box based on hybrid power supply is provided for the disclosed embodiments of the present application. DETAILED DESCRIPTION

[0048] The exemplary embodiments will be described in detail herein with reference to the attached drawings. When the description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of apparatuses and methods consistent with some aspects of the present application as detailed in the appended claims.

[0049] In order to solve the problem that the volume and sound quality of the USB sound box are limited due to the power constraint, and the power of the sound box with an adapter supplied by the mains is limited by the power of the adapter, resulting in high manufacturing cost of the sound box, a series of researches are conducted on the sound box. After the audio signal is converted into an analog audio signal in the sound box, the analog audio signal is a dynamic current signal, and the size of the current changes according to the frequency and intensity of the audio sound and other factors, and the change is very large. For example, due to the difference in frequency and intensity, the current intensity of the audio signal in a song can be up to 10,000 times different in the gentle prelude and the intense chorus. It is found in the experiment that the average power consumption of a USB sound box with a power supply of 6W is only about 3W when playing music. Based on the above findings, the present embodiment first proposes to take power supply as the breakthrough point to effectively solve the problem of power limitation. Specifically, the present embodiment provides a high-power sound box based on hybrid power supply, as shown in Figure 1The sound box is mainly composed of an audio input unit 1, a power amplifier unit 2, a loudspeaker 3 and a power management module 4. The audio input unit 1 is used to receive input audio signals. The input end of the power amplifier unit 2 is connected with the output end of the audio input unit 1, which is used to receive the audio signals output by the audio input unit 1 and amplify the audio signals. The input end of the loudspeaker 3 is connected with the output end of the power amplifier unit 2. The power amplifier unit 2 inputs the amplified audio signals into the loudspeaker 3 to drive the loudspeaker to produce sound. The power management module 4 is mainly composed of a power supply unit 41, a battery power supply unit 42 and a FET control unit 43. The input end of the power supply unit 41 is connected with an external power supply. The battery power supply unit 42 and the FET control unit 43 are connected in series and connected with the output end of the power supply unit 41. The power management module 4 automatically switches the conduction state of the FET control unit 43 according to the required power amplifier power of the power amplifier unit 2 and the corresponding system voltage change of the power amplifier unit 2, adjusts the working state of the battery power supply unit 42 and the power supply unit 41, and dynamically supplies power for the power amplifier unit 2.

[0050] The working state of the FET control unit 43 includes forward conduction, reverse conduction and off. The power management module 4 automatically switches the conduction state of the FET control unit 43 according to the required power amplifier power of the power amplifier unit 2 and the corresponding system voltage change of the power amplifier unit 2, adjusts the working state of the battery power supply unit 42 and the power supply unit 41, and dynamically supplies power for the power amplifier unit 2. Specifically,

[0051] When the required power amplifier power of the power amplifier unit 2 is less than the power supply power, and the voltage difference between the corresponding system voltage of the power amplifier unit 2 and the voltage of the battery power supply unit 42 is greater than or equal to the conduction threshold of the FET control unit 43, the FET control unit 43 is forward conducted, and the power supply unit 41 supplies power for the power amplifier unit 2 and charges the battery power supply unit 42 at the same time;

[0052] When the required power amplifier power of the power amplifier unit 2 is less than the power supply power, and the voltage difference between the corresponding system voltage of the power amplifier unit 2 and the voltage of the battery power supply unit 42 is less than the conduction threshold of the FET control unit 43, the FET control unit 43 is not conducted, and the power supply unit 41 only supplies power for the power amplifier unit 2;

[0053] When the required power amplifier power of the power amplifier unit 2 is greater than or equal to the power supply power, and the voltage difference between the voltage of the battery power supply unit 42 and the corresponding system voltage of the power amplifier unit 2 is greater than or equal to the conduction threshold of the FET control unit 43, the FET control unit 43 is reverse conducted, and the power supply unit 41 and the battery power supply unit 42 supply power for the power amplifier unit 2 at the same time.

[0054] The on state of the FET control unit 43 is automatically controlled by the voltage difference across the FET control unit 43. As found in the above experiment, for an input audio signal of a piece of music, the corresponding audio signal current varies due to different factors such as frequency and intensity of the audio sound, and the amplification factor of the power amplifier unit in the sound box is fixed. When the input audio signal current is small, the power amplifier unit consumes less power, and since the bias resistor has a constant resistance, the voltage taken by the bias resistor is small, and the corresponding system voltage V_SYS of the power amplifier unit is high. At this time, the voltage at the connection between the FET control unit and the power supply unit is high, and the voltage at the connection between the FET control unit and the battery power supply unit is low. Under the action of the voltage difference across the FET control unit, the FET control unit is forwardly turned on, the power supply unit is connected to the power amplifier unit and the battery power supply unit, and the battery power supply unit is charged while the power amplifier unit is powered. When the battery power supply unit is fully charged, the voltage at the connection between the FET control unit and the battery power supply unit is high, and the voltage difference across the FET control unit is small. The FET control unit is not turned on, the power supply unit is connected to the power amplifier unit, and the power amplifier unit is powered. When the input audio signal current is large, the power amplifier unit consumes more power, and since the bias resistor has a constant resistance, the voltage taken by the bias resistor is large, and the corresponding system voltage V_SYS of the power amplifier unit is low. At this time, the voltage at the connection between the FET control unit and the power supply unit is low, and the voltage at the connection between the FET control unit and the battery power supply unit is high. Under the action of the voltage difference across the FET control unit, the FET control unit is reversely turned on, the power supply unit and the battery power supply unit are connected to the power amplifier unit, and the power amplifier unit is powered by both the power supply unit and the battery power supply unit. At this time, the power amplifier unit is powered by the battery power supply unit, and can play at a power greater than the power of the power supply unit. The power of the power supply unit refers to the power of the power supply unit.

[0055] The sound box uses the power supply unit as the main power supply and the battery power supply unit as the auxiliary power supply. When the playing power is small, the power supply unit supplies power to the battery power supply unit, and the battery power supply unit is shallowly charged and discharged throughout the power supply process. Therefore, the service life of the battery power supply unit is long, and the service life of the sound box is not affected. Since the output power of the battery power supply unit is not high, the performance requirement of the battery power supply unit is not high, and only a small capacity battery is needed, which has a low cost. The battery power supply unit can be a storage battery, a lithium battery, or other types of rechargeable batteries.

[0056] If the battery power supply unit powers the power amplifier unit alone, not only is there a problem of large loss of the battery power supply unit, but also the battery power supply unit alone cannot usually meet sufficient power supply, so that the sound performance of the sound box is distorted, affecting the playing sound quality. In order to avoid the occurrence of the above situation, as a technical solution improvement, see Figure 1 The USB sound box is also provided with a power supply detection unit 5, the input end of the power supply detection unit 5 is connected with the input port of the power supply unit 41, for detecting whether there is power supply current input to the power supply unit 41, the output end of the power supply detection unit 5 is connected with the control end of the power amplifier unit 2, the power supply detection unit 5 controls whether the power amplifier unit 2 is allowed to start according to the detected external power supply current state input to the power supply unit 41. Specifically, when detecting that there is external power supply current, the power amplifier unit 2 is allowed to start, at this time, after the sound box is powered on, the sound box is normally started; when detecting that there is no external power supply current, the power amplifier unit 2 is not allowed to start, at this time, even if the sound box is powered on, the sound box still cannot be started to work normally.

[0057] The above-mentioned high-power sound box can be applied in a USB sound box or a sound box powered by a mains with an adapter.

[0058] When applied in a USB sound box, the problem that the USB sound box is restricted by power can be effectively solved. Generally, the voltage supplied through the USB interface is 5V, and the corresponding power of the sound box power supply is 6W. By adopting the above technical solution, a single 18650 lithium battery is set as a battery power supply unit while the power supply unit is set in the sound box. At this time, the power supply unit and the battery power supply unit supply power to the power amplifier unit at the same time, and the sound box can complete the output of nearly 12W power and is no longer limited by the power of 6W. In actual use, different voltage batteries can be configured as battery power supply units according to actual needs to meet the output of corresponding power.

[0059] When applied in a sound box powered by a mains with an adapter, the cost of the sound box can be reduced. Taking the sound box with a power of 36W in the background technology as an example, by using the previous technology, a 36W adapter needs to be configured, and the price is about RMB 36. However, by using the above-mentioned scheme, an 18W adapter can be configured for the 36W sound box, and a set of 18W battery is built-in as a battery power supply unit. At this time, when the power supply unit and the battery power supply unit supply power to the power amplifier unit at the same time, the maximum output power can still reach 36W, and at this time, the corresponding cost is about 24 yuan, of which the 18W adapter is 18 yuan, and the 18W battery set is 6 yuan. On the basis of guaranteeing the original power output, the manufacturing cost is reduced.

[0060] The embodiment also provides a power supply method for improving power of a sound box based on hybrid power supply, wherein a battery power supply unit and a power supply unit powered by an external power supply are simultaneously arranged in the sound box, and the power supply method is shown in Figure 2 The power supply method comprises the following steps:

[0061] S1: obtaining an audio signal input by the sound box and detecting a current value corresponding to the audio signal;

[0062] S2: calculating a power amplifier power required by the sound box according to the current value corresponding to the audio signal and a power amplifier multiple of the sound box;

[0063] S3: detecting a system voltage corresponding to a power amplifier unit in the sound box and a voltage of a battery power supply unit in the sound box in real time;

[0064] S4: controlling working states of the battery power supply unit and the power supply unit according to the power amplifier power required by the sound box, the system voltage corresponding to the power amplifier unit in the sound box and the voltage of the battery power supply unit in the sound box, and dynamically supplying power for the power amplifier unit in the sound box.

[0065] In the step S4, the working states of the battery power supply unit and the power supply unit are controlled according to the power amplifier power required by the sound box, the system voltage corresponding to the power amplifier unit in the sound box and the voltage of the battery power supply unit in the sound box, and the power is dynamically supplied for the power amplifier unit in the sound box, and specifically:

[0066] comparing the power amplifier power required by the sound box with a rated power amplifier power of the sound box to obtain a power comparison result;

[0067] comparing the system voltage corresponding to the power amplifier unit in the sound box and the voltage of the battery power supply unit in the sound box to obtain a voltage comparison result;

[0068] controlling the working states of the battery power supply unit and the power supply unit according to the power comparison result and the voltage comparison result, and dynamically supplying power for the power amplifier unit in the sound box;

[0069] When the power amplifier power required by the sound box is less than the rated power amplifier power of the sound box, and a voltage difference between the system voltage corresponding to the power amplifier unit in the sound box and the voltage of the battery power supply unit is greater than or equal to a threshold value, the power supply unit is controlled to supply power for the power amplifier unit in the sound box and charge the battery power supply unit at the same time.

[0070] When the power amplifier power required by the sound box is less than the rated power amplifier power of the sound box, and the voltage difference between the system voltage corresponding to the power amplifier unit in the sound box and the voltage of the battery power supply unit is less than the threshold value, the power supply unit is controlled to supply power only for the power amplifier unit in the sound box.

[0071] When the power amplifier power required by the sound box is greater than or equal to the rated power amplifier power of the sound box, and the voltage difference between the system voltage corresponding to the power amplifier unit in the sound box and the voltage of the battery power supply unit is greater than or equal to the threshold value, the power supply unit and the battery power supply unit supply power to the power amplifier unit in the sound box at the same time.

[0072] In order to avoid the case that the battery power supply unit works alone to supply power to the power amplifier unit in the sound box, as an improvement of the technical solution, the above-mentioned power supply method further includes the following steps:

[0073] The input power supply current of the power supply unit in the sound box is detected, and when the input power supply current is greater than the current threshold value, the power amplifier unit in the sound box is allowed to start, otherwise the power amplifier unit in the sound box is not allowed to start.

[0074] The above-mentioned power supply method is also applicable to the case that the sound box is a USB sound box or a sound box supplied by commercial power with an adapter.

[0075] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0076] It should be understood that the application is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the appended claims.

Claims

1. A high-power sound box based on hybrid power supply, characterized in that, The application relates to an audio power amplifier, which comprises an audio input unit (1), a power amplifier unit (2), a loudspeaker (3), a power management module (4) and a power supply detection unit (5). The audio input unit (1) is used for receiving input audio signals. The input end of the power amplifier unit (2) is connected with the output end of the audio input unit (1), the power amplifier unit (2) is used for receiving the audio signals output by the audio input unit (1) and amplifying the audio signals. The input end of the loudspeaker (3) is connected with the output end of the power amplifier unit (2), the loudspeaker (3) is driven to sound by the amplified audio signals output by the power amplifier unit (2). The power management module (4) comprises a power supply unit (41), a battery power supply unit (42) and a FET control unit (43). The input end of the power supply unit (41) is connected with an external power supply. The battery power supply unit (42) is connected with the FET control unit (43) in series and is connected with the output end of the power supply unit (41). The power management module (4) automatically switches the conduction state of the FET control unit (43) according to the required power amplifier power of the power amplifier unit (2) and the corresponding system voltage variation of the power amplifier unit (2), adjusts the working state of the battery power supply unit (42) and the power supply unit (41) and dynamically supplies power for the power amplifier unit (2). The conduction state of the FET control unit (43) comprises forward conduction, reverse conduction and non-conduction. The input end of the power supply detection unit (5) is connected with the input port of the power supply unit (41) and is used for detecting whether there is a power supply current input to the power supply unit (41), the output end of the power supply detection unit (5) is connected with the control end of the power amplifier unit (2), the power supply detection unit (5) controls whether the power amplifier unit (2) is allowed to start according to the detected external power supply current state of the power supply unit (41), the power management module (4) automatically switches the conduction state of the FET control unit (43) according to the required power amplifier power of the power amplifier unit (2) and the corresponding system voltage variation of the power amplifier unit (2), adjusts the working state of the battery power supply unit (42) and the power supply unit (41) and dynamically supplies power for the power amplifier unit (2), specifically as follows: When the required power amplifier power of the power amplifier unit (2) is smaller than the power supply power and the voltage pressure difference between the corresponding system voltage of the power amplifier unit (2) and the voltage of the battery power supply unit (42) is greater than or equal to the conduction threshold value of the FET control unit (43), the FET control unit (43) is forwardly conducted, the power supply unit (41) supplies power for the power amplifier unit (2) and charges the battery power supply unit (42) at the same time. ​ When the power amplifier power required by the power amplifier unit (2) is less than the power supply power, and the voltage difference between the system voltage corresponding to the power amplifier unit (2) and the voltage of the battery power supply unit (42) is less than the conduction threshold of the FET control unit (43), the FET control unit (43) is not conductive, and the power supply unit (41) only supplies power to the power amplifier unit (2); When the power amplifier power required by the power amplifier unit (2) is greater than or equal to the power supply power, and the voltage difference between the battery power supply unit (42) and the system voltage corresponding to the power amplifier unit (2) is greater than or equal to the conduction threshold of the FET control unit (43), the FET control unit (43) is reversely conductive, and the power supply unit (41) and the battery power supply unit (42) simultaneously supply power to the power amplifier unit (2).

2. The high-power speaker based on hybrid power supply according to claim 1, characterized in that, The high-power sound box is a USB sound box or a sound box powered by a mains adapter.

3. A power supply method for improving power of a sound box based on hybrid power supply, characterized in that, The sound box is provided with a battery power supply unit and a power supply unit powered by an external power supply at the same time. The power supply method comprises the following steps: Obtain the audio signal input by the sound box, and detect the current value corresponding to the audio signal; According to the current value corresponding to the audio signal and the power amplifier multiple of the sound box, the power amplifier power required by the sound box is calculated and obtained; Real-time detection of the system voltage corresponding to the power amplifier unit in the sound box and the voltage of the battery power supply unit in the sound box; According to the power amplifier power required by the sound box, the system voltage corresponding to the power amplifier unit in the sound box and the voltage of the battery power supply unit in the sound box, the working state of the battery power supply unit and the power supply unit is controlled, and the power amplifier unit in the sound box is dynamically powered; The power amplifier power required by the sound box is compared with the rated power amplifier power of the sound box to obtain a power comparison result; The system voltage corresponding to the power amplifier unit in the sound box and the voltage of the battery power supply unit in the sound box are compared to obtain a voltage comparison result; According to the power comparison result and the voltage comparison result, the working state of the battery power supply unit and the power supply unit is controlled, and the power amplifier unit in the sound box is dynamically powered; According to the power comparison result and the voltage comparison result, the working state of the battery power supply unit and the power supply unit is controlled, and the power amplifier unit in the sound box is dynamically powered; When the power amplifier power required by the sound box is less than the rated power amplifier power of the sound box, and the voltage difference between the system voltage corresponding to the power amplifier unit in the sound box and the voltage of the battery power supply unit is greater than or equal to the threshold, the power supply unit is controlled to supply power to the power amplifier unit in the sound box while charging the battery power supply unit. ​ When the power amplifier power required by the sound box is less than the rated power amplifier power of the sound box, and the voltage difference between the system voltage corresponding to the power amplifier unit in the sound box and the voltage of the battery power supply unit is less than a threshold, the power supply unit is controlled to supply power only to the power amplifier unit in the sound box; When the power amplifier power required by the sound box is greater than or equal to the rated power amplifier power of the sound box, and the voltage difference between the system voltage corresponding to the power amplifier unit in the sound box and the voltage of the battery power supply unit is greater than or equal to a threshold, the power supply unit and the battery power supply unit are controlled to supply power to the power amplifier unit in the sound box at the same time; The input power supply current of the power supply unit in the sound box is detected, and when the input power supply current is greater than a current threshold, the power amplifier unit in the sound box is allowed to start, otherwise the power amplifier unit in the sound box is not allowed to start.

4. The power supply method for improving the power of a sound box based on hybrid power supply according to claim 3, characterized in that, The sound box is a USB sound box or a sound box supplied by a commercial power supply with an adapter.

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