Sound box with battery under-voltage protection control circuit

Abstract

The utility model relates to the field of sound equipment, in particular to a sound box with a battery under-voltage protection control circuit, which comprises a mobile sound box load part, a P-MOS (P-Metal Oxide Semiconductor) control circuit, a comparison unit, a set under-voltage control circuit, an under-voltage indication circuit and a 12V lead-acid battery power supply, wherein the P-MOS tube control circuit is used for controlling the on-off of an MOS tube connected in series between a 12V lead-acid battery power supply and a load part of the mobile loudspeaker box, and the under-voltage protection function of the 12V lead-acid battery power supply is realized through the combined application of the P-MOS control circuit, the comparison unit, the set under-voltage control circuit and the under-voltage indication circuit. And when the voltage of the battery is lower than the set threshold voltage, the under-voltage protection circuit can quickly judge and output a control signal to control the MOS tube to be disconnected, so that the power supply of the sound box is effectively cut off. Therefore, equipment damage or performance reduction caused by over discharge of the battery is avoided, the service life of the battery is prolonged, and the reliability and safety of the sound box are improved.

Description

Technical Field

[0001] The utility model relates to the field of audio equipment, in particular to a sound box with a battery undervoltage protection control circuit. Background Art

[0002] With the rapid development of modern technology, people's lifestyles are becoming increasingly diversified. The popularity of activities such as live broadcasting and square dancing has led to a sharp increase in the demand for mobile speakers. Mobile speakers have been widely used in various outdoor activities due to their portability and practicality. However, the power supply problem of mobile speakers has always been one of the key factors affecting their performance and service life.

[0003] At present, most mobile speakers use lead-acid batteries as power sources. Lead-acid batteries have become the first choice for mobile speaker power sources due to their high energy density, low cost and relatively stable performance. However, there is an important problem with lead-acid batteries during use, namely over-discharge. When the lead-acid battery is discharged, lead sulfate will be produced on its positive and negative plates. Lead sulfate has poor conductivity. If it is not charged in time, especially when the temperature drops, the lead sulfate will recrystallize into coarse grains. Such coarse grains of lead sulfate are difficult to dissolve and ionize, and difficult to reduce during charging, that is, sulfidation occurs.

[0004] Sulfation has a serious impact on the performance and service life of lead-acid batteries. The internal resistance of lead-acid batteries after sulfation increases, resulting in a decrease in external output power, which cannot meet the normal use requirements of mobile speakers. In addition, long-term over-discharge will accelerate the aging of the battery, shorten its service life, and increase the user's maintenance costs.

[0005] Therefore, how to effectively prevent lead-acid batteries from over-discharging and protect them from damage caused by sulfation has become an urgent problem to be solved in the field of mobile speaker design. Although there are some protection measures for lead-acid batteries on the market, most of them are limited to simple voltage detection or timed charging, and cannot achieve accurate and reliable undervoltage protection. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the utility model provides a speaker with a battery undervoltage protection control circuit.

[0008] (II) Technical solution

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: the utility model provides a speaker with a battery undervoltage protection control circuit, comprising a mobile speaker load part, a P-MOS control circuit, a comparison unit, a set undervoltage control circuit, an undervoltage indication circuit and a V lead-acid battery power supply, wherein the P-MOS tube control circuit is used to control the on-off of a MOS tube connected in series between the V lead-acid battery power supply and the mobile speaker load part, the P-MOS tube control circuit has a MOS tube control signal input terminal, the MOS tube control circuit includes a triode Q, and also includes an undervoltage protection circuit, the undervoltage protection circuit outputs an undervoltage protection control signal through the drain of the MOS tube, which is used to determine whether the voltage of the V lead-acid battery power supply is lower than the set threshold voltage.

[0010] Preferably, the collector of the transistor Q1 is connected to the gate of the MOS tube, the base of the transistor Q1 is connected to the positive electrode of a 12V lead-acid battery power source, and the emitter of the transistor Q1 is connected to the control signal input terminal of the MOS tube.

[0011] Further preferably, the undervoltage protection circuit includes a clamping diode and a resistor R13, the cathode of the clamping diode is connected to the output end of the comparison unit through the resistor R13, and the anode of the clamping diode is connected to the P-MOS tube control circuit.

[0012] Again preferably, the undervoltage protection circuit further includes a voltage stabilizing diode circuit and a resistor voltage divider circuit, which are used to control the saturated conduction state of the transistor S8050 when the power supply voltage gradually decreases.

[0013] Preferably, the disconnection state of the undervoltage protection circuit is that when the resistor voltage is lower than the set conduction condition, the MOS tube is controlled to be disconnected.

[0014] Further preferably, the activation state of the undervoltage protection circuit is that when the lead-acid battery voltage is lower than a set threshold voltage, the undervoltage indication circuit is activated.

[0015] Again preferably, the mobile speaker load part includes a shell and a base, the shell is fixedly mounted on the base, a cavity is provided inside the shell, a circuit board is arranged in the cavity, the P-MOS control circuit, the comparison unit, the set undervoltage control circuit, the undervoltage indication circuit and the 12V lead-acid battery power supply are all adapted to the circuit board, a speaker and an undervoltage indicator light are provided on one side of the shell, and the speaker and the undervoltage indicator light are both adapted to the circuit board.

[0016] Preferably, a sealing groove is provided on the side of the base, and a sealing edge is provided on the bottom side of the shell. The sealing edge is adapted to the sealing groove through a sealing rod. Fixing bolts penetrate the corners of the sealing edge. The fixing bolts penetrate the sealing edge through a threaded structure to adapt to the base.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the utility model provides a speaker with a battery undervoltage protection control circuit, which has the following beneficial effects:

[0019] Battery undervoltage protection function: Through the combined application of P-MOS control circuit, comparison unit, undervoltage control circuit and undervoltage indication circuit, the undervoltage protection function of 12V lead-acid battery power is realized. When the battery voltage is lower than the set threshold voltage, the undervoltage protection circuit can quickly judge and output the control signal to control the MOS tube to disconnect, thereby effectively cutting off the power supply of the speaker. This avoids equipment damage or performance degradation caused by excessive battery discharge, prolongs the battery life, and improves the reliability and safety of the speaker.

[0020] Intelligent management: The speaker can monitor the battery voltage status in real time through the intelligent design of the comparison unit and undervoltage protection circuit, and automatically trigger the protection mechanism when the voltage is too low. This intelligent management not only reduces the tediousness of manual operation by users, but also improves the automation level and convenience of the speaker.

[0021] Timely undervoltage reminder: When the battery voltage is lower than the set threshold, the undervoltage indication circuit will be activated and the undervoltage indicator light will be lit. This timely undervoltage reminder function enables users to quickly understand the battery status and take corresponding measures to charge or replace the battery, avoiding the normal use of the speaker being affected by low battery power.

[0022] Structural stability and sealing: The moving load part of the speaker is fixedly installed on the shell and the base, and the sealing groove and the sealing rod cooperate to achieve structural stability and sealing. This design not only improves the overall stability of the speaker, but also effectively prevents external factors such as dust and moisture from corroding the internal circuit board, ensuring the durability and service life of the speaker.

[0023] To sum up, the speaker with battery undervoltage protection control circuit described in this patent achieves beneficial effects such as battery undervoltage protection, intelligent management, timely undervoltage prompts, structural stability and sealing through a series of technical solutions, thereby improving the performance and user experience of the speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the load part of the mobile speaker of the utility model;

[0025] Figure 2 This is a schematic diagram of the cross-sectional structure of the load portion of the mobile speaker of the utility model;

[0026] Figure 3 This is a schematic diagram of the working structure of the utility model;

[0027] Figure 4 This is a schematic diagram of the overall circuit structure of the utility model;

[0028] In the figure: 1. mobile speaker load part; 2. base; 3. shell; 4. sealing edge; 5. speaker; 6. undervoltage indicator light; 7. cavity; 8. 12V lead-acid battery power supply; 9. circuit board; 10. sealing rod. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-4 The utility model discloses a speaker with a battery undervoltage protection control circuit, comprising a mobile speaker load part 1, a P-MOS control circuit, a comparison unit, a set undervoltage control circuit, an undervoltage indication circuit and a 12V lead-acid battery power source 8, wherein the P-MOS tube control circuit is used to control the on-off of a MOS tube connected in series between the 12V lead-acid battery power source 8 and the mobile speaker load part 1, the P-MOS tube control circuit has a MOS tube control signal input terminal, the MOS tube control circuit includes a transistor Q1, and also includes an undervoltage protection circuit, the undervoltage protection circuit outputs an undervoltage protection control signal through the drain of the MOS tube, and is used to determine whether the voltage of the 12V lead-acid battery power source 8 is lower than the set threshold voltage.

[0031] The preferred solution of the above-mentioned speaker with battery undervoltage protection control circuit is:

[0032] Transistor Q1 and P-MOS tube control circuit:

[0033] The collector of transistor Q1 is connected to the gate of the P-MOS tube, the base is connected to the positive electrode of the 12V lead-acid battery power source 8, and the emitter is connected to the control signal input terminal of the P-MOS tube. This connection mode enables transistor Q1 to act as a switch to control the on and off of the P-MOS tube.

[0034] When the lead-acid battery voltage is normal, the transistor Q1 is turned on and the P-MOS tube is also in the on state, allowing current to pass through, thereby ensuring the normal operation of the speaker.

[0035] When the lead-acid battery voltage is lower than the set threshold, the transistor Q1 is cut off, the P-MOS tube is disconnected, and the power supply is cut off, thereby preventing the battery from over-discharging.

[0036] Undervoltage protection circuit:

[0037] It includes a clamping diode and a resistor R13. The clamping diode is connected to the resistor R13 and the output end of the comparison unit and is used to stabilize the voltage under specific conditions.

[0038] It also includes a voltage-stabilizing diode circuit and a resistor voltage-dividing circuit. These circuits work together to achieve precise control of the voltage by controlling the saturated conduction state of the transistor S8050 when the power supply voltage gradually decreases.

[0039] Undervoltage indication circuit:

[0040] When the lead-acid battery voltage is lower than the set threshold voltage, the undervoltage indication circuit is activated and a warning is issued to the user through the undervoltage indicator light 6, reminding the user to charge or replace the battery in time.

[0041] Speaker load part structure: The speaker load part is composed of a housing 3 and a base 2, with a cavity 7 inside to accommodate a circuit board 9 and other electronic components. The P-MOS control circuit, comparison unit, undervoltage control circuit, undervoltage indication circuit and battery power supply are all adapted to the circuit board 9. The housing 3 is provided with a speaker 5 and an undervoltage indicator 6, which are also adapted to the circuit board 9 to realize the audio playback and undervoltage prompt functions.

[0042] Sealing and fixing structure: A sealing groove is provided on the side of the base 2, and a sealing edge 4 is provided on the bottom side of the housing 3. The sealing rod 10 is matched with the sealing groove to achieve the sealing of the speaker and prevent dust and moisture from entering the interior of the speaker. At the same time, fixing bolts are passed through the corners of the sealing edge 4, which are matched with the base 2 through the threaded structure to ensure the stability of the speaker structure.

[0043] The present invention describes a speaker with a battery undervoltage protection control circuit. The core of the speaker is to achieve effective management of the lead-acid battery power supply through a specific circuit structure, ensuring that the power supply can be safely disconnected when the battery voltage is too low to avoid equipment damage or safety accidents.

[0044] Here’s how it works:

[0045] Power Management and Control:

[0046] The P-MOS control circuit is the core of the speaker power management. It is responsible for controlling the on / off of the MOS tube connected in series between the 12V lead-acid battery power source 8 and the mobile speaker load part 1. When the battery voltage is normal, the MOS tube remains on, allowing current to pass through and providing the required power for the speaker; when the battery voltage is lower than the set threshold, the MOS tube is disconnected and the power supply is cut off.

[0047] The function of transistor Q1:

[0048] Transistor Q1 plays a key role in the circuit. Its collector is connected to the gate of the MOS tube, the base is connected to the positive electrode of the battery, and the emitter is connected to the control signal input terminal of the MOS tube. When the battery voltage is normal, transistor Q1 is turned on, allowing current to pass and activate the MOS tube; when the battery voltage is too low, transistor Q1 is turned off, cutting off the current supply to the gate of the MOS tube, thereby controlling the MOS tube to disconnect.

[0049] Undervoltage protection circuit:

[0050] The undervoltage protection circuit is a key part for judging whether the battery voltage is lower than the set threshold. It includes components such as clamping diode, resistor R13, voltage regulator diode circuit and resistor voltage divider circuit. The clamping diode and resistor R13 are connected to the output end of the comparison unit to pass the comparison result to the P-MOS tube control circuit. When the battery voltage drops, the saturated conduction state of the transistor S8050 is controlled through the resistor voltage divider circuit and the voltage regulator diode circuit, thereby triggering the undervoltage protection mechanism.

[0051] Undervoltage indication and disconnection control:

[0052] When the battery voltage is lower than the set threshold, the undervoltage protection circuit is activated, and by controlling the conduction state of the transistor S8050, the undervoltage protection control signal is output to the P-MOS tube control circuit, so that the MOS tube is disconnected, thereby cutting off the power supply of the speaker. At the same time, the undervoltage indication circuit is activated, and the undervoltage indicator light 6 is lit, reminding the user that the battery voltage is too low and needs to be charged or replaced in time.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A speaker with a battery undervoltage protection control circuit, characterized in that: The invention comprises a mobile speaker load part (1), a P-MOS control circuit, a comparison unit, a set undervoltage control circuit, an undervoltage indication circuit and a 12V lead-acid battery power source (8), wherein the P-MOS tube control circuit is used to control the on-off of a MOS tube connected in series between the 12V lead-acid battery power source (8) and the mobile speaker load part (1), the P-MOS tube control circuit has a MOS tube control signal input terminal, the MOS tube control circuit comprises a triode Q1, and also comprises an undervoltage protection circuit, the undervoltage protection circuit outputs an undervoltage protection control signal through the drain of the MOS tube, and is used to judge whether the voltage of the 12V lead-acid battery power source (8) is lower than a set threshold voltage.

2. A speaker with a battery undervoltage protection control circuit according to claim 1, characterized in that: The collector of the transistor Q1 is connected to the gate of the MOS tube, the base of the transistor Q1 is connected to the positive electrode of a 12V lead-acid battery power source (8), and the emitter of the transistor Q1 is connected to the control signal input terminal of the MOS tube.

3. A speaker with a battery undervoltage protection control circuit according to claim 2, characterized in that: The undervoltage protection circuit includes a clamping diode and a resistor R13, the cathode of the clamping diode is connected to the output end of the comparison unit through the resistor R13, and the anode of the clamping diode is connected to the P-MOS tube control circuit.

4. A speaker with a battery undervoltage protection control circuit according to claim 3, characterized in that: The undervoltage protection circuit also includes a voltage-stabilizing diode circuit and a resistor voltage-dividing circuit, which are used to control the saturated conduction state of the transistor S8050 when the power supply voltage gradually decreases.

5. A speaker with a battery undervoltage protection control circuit according to claim 4, characterized in that: The disconnected state of the undervoltage protection circuit is that when the resistor voltage is lower than the set conduction condition, the MOS tube is controlled to be disconnected.

6. A speaker with a battery undervoltage protection control circuit according to claim 5, characterized in that: The activation state of the undervoltage protection circuit is that when the lead-acid battery voltage is lower than a set threshold voltage, the undervoltage indication circuit is activated.

7. A speaker with a battery undervoltage protection control circuit according to claim 6, characterized in that: The mobile speaker load part (1) comprises a shell (3) and a base (2); the shell (3) is fixedly mounted on the base (2); a cavity (7) is arranged inside the shell (3); a circuit board (9) is arranged inside the cavity (7); the P-MOS control circuit, the comparison unit, the undervoltage control circuit, the undervoltage indication circuit and the 12V lead-acid battery power source (8) are all adapted to the circuit board (9); a speaker (5) and an undervoltage indicator light (6) are arranged on one side of the shell (3); and the speaker (5) and the undervoltage indicator light (6) are all adapted to the circuit board (9).

8. The speaker with a battery undervoltage protection control circuit according to claim 7, characterized in that: A sealing groove is provided on the side of the base (2), and a sealing edge (4) is provided on the bottom side of the housing (3). The sealing edge (4) is adapted to the sealing groove via a sealing rod (10). Fixing bolts are passed through the corners of the sealing edge (4). The fixing bolts pass through the sealing edge (4) via a threaded structure and are adapted to the base (2).

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