A quick testing device for displaying the power of a bone conduction hearing aid lithium battery

Abstract

The utility model relates to bone conduction type hearing aid technical field especially bone conduction type hearing aid lithium cell electric quantity display quick testing device, the bone conduction type hearing aid includes mutually connected power management circuit and power display circuit, and this testing device includes low electric quantity circuit for outputting greater than or equal to 3.0V and less than 3.4V voltage, the electric quantity circuit for outputting greater than or equal to 3.4V and less than 3.8V voltage, high electric quantity circuit for outputting greater than or equal to 3.8V and less than 4.2V voltage, middle electric quantity button and high electric quantity button. The bone conduction type hearing aid lithium cell electric quantity display quick testing device has integrated low electric quantity circuit, electric quantity circuit and high electric quantity circuit three grades voltage analog circuit, only needs a 5V direct current power as power input, and the simple button switching is matched, can realize low, middle, high three grades analog voltage's quick output to realize the quick and accurate electric quantity display function detection.

Description

Technical Field

[0001] This utility model relates to the field of bone conduction hearing aid technology, and in particular to a rapid testing device for displaying the lithium battery power of bone conduction hearing aids. Background Technology

[0002] Bone conduction hearing aids are hearing aids that transmit sound vibrations directly to the skull via a bone resonator, stimulating the auditory nerve in the inner ear to achieve sound perception. Bone conduction hearing aids primarily rely on the bone resonator for operation, but because driving the resonator requires significant power, they are typically powered by high-capacity and highly stable lithium batteries. The state of the lithium battery is crucial for the normal use of bone conduction hearing aids. To help users easily monitor the remaining battery power, bone conduction hearing aids usually have three LEDs that visually indicate the high, medium, and low battery status, helping users plan their usage time and avoid insufficient power affecting the normal operation of the bone conduction hearing aid.

[0003] Given the critical importance of lithium battery status for the proper functioning of bone conduction hearing aids, frequent real-time testing of the lithium battery status display function is necessary during the production and testing process. Currently, two main testing methods are commonly used: one involves using three adjustable regulated power supplies, each outputting voltage signals corresponding to high, medium, and low battery levels to simulate different lithium battery statuses. The accuracy of the status display is determined by observing the on / off status of three LEDs. While this method is accurate and intuitive, it requires multiple adjustable regulated power supplies, resulting in high equipment costs and significant space requirements. The other method uses a single adjustable regulated power supply, manually adjusting the output voltage to simulate different lithium battery statuses, enabling multi-level status testing. Similarly, the accuracy of the status display is confirmed by observing the changes in the three LEDs. While this method meets the testing requirements, the frequent manual voltage adjustments are cumbersome and time-consuming, impacting overall testing efficiency. Utility Model Content

[0004] In view of this, this utility model proposes a rapid testing device for displaying the lithium battery power of bone conduction hearing aids, aiming to solve the problems of high cost and low testing efficiency of existing bone conduction hearing aid lithium battery power display testing methods.

[0005] This utility model proposes a rapid testing device for displaying the lithium battery power of a bone conduction hearing aid. The bone conduction hearing aid includes a power management circuit and a power display circuit connected to each other. The rapid testing device for displaying the lithium battery power of the bone conduction hearing aid includes a low-power circuit for outputting a voltage greater than or equal to 3.0V and less than 3.4V, a medium-power circuit for outputting a voltage greater than or equal to 3.4V and less than 3.8V, a high-power circuit for outputting a voltage greater than or equal to 3.8V and less than 4.2V, a medium-power button for switching the medium-power circuit on and off, and a high-power button for switching the high-power circuit on and off.

[0006] In this circuit, one end of the low-power circuit, the medium-power circuit, and the high-power circuit are all connected to an external 5V DC power supply. The other end of the medium-power circuit is connected to one end of the medium-power button, and the other end of the high-power circuit is connected to one end of the high-power button. The other ends of the low-power circuit, the medium-power button, and the high-power button are all connected to the external power management circuit.

[0007] Furthermore, the bone conduction hearing aid lithium battery power display rapid testing device also includes the 5V DC power supply.

[0008] Furthermore, the low-power circuit includes a voltage regulator U1, a step-down diode D1, a step-down diode D2, and a capacitor C1; the input terminal of the voltage regulator U1 is connected to the 5V DC power supply and one end of the capacitor C1, respectively; the other end of the capacitor C1 is connected to the input power supply ground, the ground terminal, and the output analog battery ground terminal, respectively; the ground terminal of the voltage regulator U1 is grounded through the step-down diode D1; and the output terminal of the voltage regulator U1 is connected to the output analog battery voltage terminal through the step-down diode D2.

[0009] Furthermore, the low-power circuit also includes a capacitor C6, one end of which is connected to the output terminal of the voltage regulator U1, and the other end of which is grounded.

[0010] Furthermore, the medium-power circuit includes a voltage regulator U2, a step-down diode D3, and a capacitor C2; the input terminal of the voltage regulator U2 is connected to the 5V DC power supply and one end of the capacitor C2, the other end of the capacitor C2 is connected to the ground terminal and the output analog battery voltage terminal, the ground terminal of the voltage regulator U2 is grounded through the step-down diode D3, and the output terminal of the voltage regulator U2 is connected to the output analog battery voltage terminal through the medium-power button.

[0011] Furthermore, the medium-power circuit also includes a capacitor C5, one end of which is connected to the output terminal of the voltage regulator U2, and the other end of which is grounded.

[0012] Furthermore, the medium-capacity circuit also includes a light-emitting diode (LED) and a resistor R1. One end of the LED is connected to the ground terminal, and the other end of the LED is connected to the output analog battery voltage terminal through the resistor R1.

[0013] Furthermore, the high-capacity circuit includes a voltage regulator U3, a step-down diode D4, a step-down diode D5, and a capacitor C3; the input terminal of the voltage regulator U3 is connected to the 5V DC power supply and one end of the capacitor C3, the other end of the capacitor C3 is grounded, the ground terminal of the voltage regulator U3 is grounded through the step-down diode D5 and the step-down diode D4 in sequence, and the output terminal of the voltage regulator U3 is connected to the output analog battery voltage terminal through the high-capacity button.

[0014] Furthermore, the high-capacity circuit also includes a capacitor C4, one end of which is connected to the output terminal of the voltage regulator U3, and the other end of which is grounded.

[0015] Furthermore, the power display circuit includes three LEDs, all of which are connected to the power management circuit.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: A rapid testing device for displaying the lithium battery power of a bone conduction hearing aid, wherein the bone conduction hearing aid includes a power management circuit and a power display circuit connected to each other, and the rapid testing device for displaying the lithium battery power of the bone conduction hearing aid includes a low-power circuit for outputting a voltage greater than or equal to 3.0V and less than 3.4V, a medium-power circuit for outputting a voltage greater than or equal to 3.4V and less than 3.8V, a high-power circuit for outputting a voltage greater than or equal to 3.8V and less than 4.2V, a medium-power button for switching the medium-power circuit on and off, and a high-power button for switching the high-power circuit on and off; wherein, one end of the low-power circuit, the medium-power circuit, and the high-power circuit are all connected to an external 5V DC power supply, the other end of the medium-power circuit is connected to one end of the medium-power button, the other end of the high-power circuit is connected to one end of the high-power button, and the other ends of the low-power circuit, the medium-power button, and the high-power button are all connected to the external power management circuit. As can be seen, this rapid testing device for lithium battery power display in bone conduction hearing aids integrates three voltage simulation circuits: low, medium, and high power. It requires only a 5V DC power supply as input and, with simple button switching, can quickly output low, medium, and high analog voltages. The external bone conduction hearing aid's power management circuit generates a corresponding power status signal based on the received analog voltage signal and outputs this signal to the power display circuit. This allows testers to monitor the power display status in real time, enabling rapid and accurate power display function testing. This integrated design significantly reduces the number and complexity of testing equipment, effectively lowering testing costs. Users can quickly switch between test voltage levels simply by operating the medium or high power button, eliminating the need for frequent voltage adjustments or equipment replacements, making operation simple and efficient. This device not only improves testing efficiency but also greatly ensures the quality and reliability of bone conduction hearing aid products. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0018] Figure 1 A block diagram of the circuit structure of the rapid testing device for displaying the lithium battery power of a bone conduction hearing aid provided in this embodiment of the utility model;

[0019] Figure 2 The circuit diagram of the rapid testing device for displaying the lithium battery power of a bone conduction hearing aid provided in this embodiment of the utility model is shown. Detailed Implementation

[0020] The solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0021] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0023] Please refer to Figure 1 As shown, this utility model proposes a rapid testing device for displaying the lithium battery power of a bone conduction hearing aid. The bone conduction hearing aid includes a power management circuit and a power display circuit connected to each other. The rapid testing device for displaying the lithium battery power of the bone conduction hearing aid includes a low-power circuit for outputting a voltage greater than or equal to 3.0V and less than 3.4V, a medium-power circuit for outputting a voltage greater than or equal to 3.4V and less than 3.8V, a high-power circuit for outputting a voltage greater than or equal to 3.8V and less than 4.2V, a medium-power button for switching the medium-power circuit on and off, and a high-power button for switching the high-power circuit on and off.

[0024] In this circuit, one end of the low-power circuit, the medium-power circuit, and the high-power circuit are all connected to an external 5V DC power supply. The other end of the medium-power circuit is connected to one end of the medium-power button, and the other end of the high-power circuit is connected to one end of the high-power button. The other ends of the low-power circuit, the medium-power button, and the high-power button are all connected to the external power management circuit.

[0025] Specifically, the lithium battery power levels of bone conduction hearing aids are typically categorized into three levels: low power (below 3.4V), medium power (between 3.4V and 3.8V), and high power (above 3.8V). This categorization directly and efficiently reflects the remaining power status of the lithium battery. The rapid testing device for displaying the lithium battery power level of bone conduction hearing aids proposed in this embodiment is a testing tool primarily used to simulate different power states of the lithium battery and serve as the power input for the bone conduction hearing aid. The power management circuit inside the bone conduction hearing aid processes this input voltage and outputs the processed power status signal to the power display circuit, helping to quickly verify whether the power display function of the bone conduction hearing aid is functioning correctly, thereby significantly shortening the testing time and improving testing efficiency. The low-battery circuit regulates the 5V input power and outputs a 3.3V analog low-battery voltage, which is then processed by the power management circuit and drives the power display circuit to detect low battery status. The medium-battery circuit regulates the 5V input power and outputs a 3.6V analog medium-battery voltage, which is then processed by the power management circuit and drives the power display circuit after passing through the medium-battery button to detect medium battery status. The high-battery circuit regulates the 5V input power and outputs a 3.9V analog high-battery voltage, which is then processed by the power management circuit and drives the power display circuit after passing through the high-battery button to detect high battery status.

[0026] Compared to existing technologies, the bone conduction hearing aid lithium battery power display rapid testing device proposed in this embodiment integrates three voltage simulation circuits: low power, medium power, and high power. It requires only a 5V DC power supply as the input and, with simple button switching, can quickly output low, medium, and high analog voltages. The power management circuit of the external bone conduction hearing aid generates a corresponding power status signal based on the received analog voltage signal and outputs this signal to the power display circuit. This allows testers to monitor the power display status in real time, enabling rapid and accurate power display function testing. This integrated design significantly reduces the number and complexity of testing equipment, effectively lowering testing costs. Users can quickly switch between test voltage levels simply by operating the medium or high power button, eliminating the need for frequent voltage adjustments or equipment replacements, making operation simple and efficient. This device not only improves testing efficiency but also greatly ensures the quality and reliability of bone conduction hearing aid products.

[0027] In some embodiments of this application, the rapid testing device for displaying the lithium battery power of the bone conduction hearing aid also includes the 5V DC power supply.

[0028] Specifically, 5V DC power supplies are a common type of power supply in electronic devices, widely used in various low-voltage electronic products and testing equipment. Common 5V DC power supplies mainly include linear regulated power supplies and USB powered power supplies. Linear regulated power supplies have a simple structure and low output ripple, making them suitable for applications with high noise requirements; USB powered power supplies are versatile and convenient, and are a commonly used power supply method for modern electronic devices. Depending on the specific testing scenario, users can choose different types of 5V DC power supplies to meet testing requirements. The 5V DC power supply is converted to 3.3V by a voltage regulator. A voltage regulator is an electronic component that can stably convert an input voltage to a fixed output voltage. Common voltage regulators that step down a 5V DC power supply to 3.3V include linear regulators and switching regulators. If the current is low and noise requirements are high, a linear regulator can be chosen; if high efficiency and a larger current output are required, a switching regulator is a better choice.

[0029] During the testing phase, firstly, the bone conduction hearing aid is connected to the bone conduction hearing aid lithium battery power display rapid testing device via the output analog battery voltage terminal (BAT+). Then, the bone conduction hearing aid lithium battery power display rapid testing device is activated and its normal operation is ensured. When the bone conduction hearing aid receives a 3.3V analog voltage signal output from the low battery circuit, it indicates compliance with the low battery standard. At this time, the bone conduction hearing aid is powered on, and the testing personnel check whether the low battery indicator light in the power display circuit is lit and confirm whether a "low battery" voice prompt is issued to check if the low battery display and alarm functions are normal. When the testing personnel press the medium battery button, the medium battery circuit is activated and outputs a 3.6V analog voltage signal to the bone conduction hearing aid's power management circuit via the output analog battery voltage terminal, indicating compliance with the medium battery standard. At this time, the testing personnel check whether the medium battery indicator light in the power display circuit is lit to check if the medium battery display function is normal. When the tester presses the high battery button, the high battery circuit is activated and outputs a 3.9V analog voltage signal to the power management circuit of the bone conduction hearing aid via the analog battery voltage output terminal, indicating that the high battery standard is met. At this time, the tester checks whether the high battery indicator light in the power display circuit is lit to check whether the high battery display function is normal. When the indicator light is lit as expected and the voice prompt is issued correctly, it indicates that the battery display and alarm functions are normal; if the indicator light is not lit or the voice prompt is missing, it indicates that the relevant functions are abnormal. By inputting analog voltage signals at these three levels into the bone conduction hearing aid, the battery display and alarm functions of the bone conduction hearing aid can be quickly and conveniently tested to ensure they are normal.

[0030] Please refer to Figure 2As shown, in some embodiments of this application, the low-power circuit includes a voltage regulator U1, a step-down diode D1, a step-down diode D2, and a capacitor C1; the input terminal of the voltage regulator U1 is connected to the 5V DC power supply and one end of the capacitor C1, respectively; the other end of the capacitor C1 is connected to the input power supply ground, the ground terminal, and the output analog battery ground terminal, respectively; the ground terminal of the voltage regulator U1 is grounded through the step-down diode D1; and the output terminal of the voltage regulator U1 is connected to the output analog battery voltage terminal through the step-down diode D2.

[0031] Specifically, capacitor C1 filters the input power supply, stabilizing the power signal and reducing interference. Voltage regulator U1 regulates the 5V input voltage to a 3.3V output. Buck diode D1 raises the voltage at the ground terminal of voltage regulator U1 by 0.3V. Buck diode D2 lowers the output voltage of voltage regulator U1 by 0.3V. Thus, the final output voltage of the low-power circuit is 3.3V (3.3V + 0.3V - 0.3V = 3.3V). It is evident that the low-power circuit, through filtering, voltage regulation, and diode adjustment, stably outputs a 3.3V voltage, simulating a low-power state. The circuit structure is simple and inexpensive.

[0032] It should be noted that both the step-down diodes D1 and D2 are preferably Schottky diodes with identical specifications to ensure consistent voltage drops, thus achieving accurate voltage regulation. During actual testing, the low-charge circuit remains continuously connected, but due to its low voltage and isolation by the step-down diode D2, it does not preempt current or affect the normal operation of other circuits. When the medium-charge and high-charge circuits are activated via a button, current flows preferentially through them due to their higher voltage, automatically cutting off the low-charge circuit and achieving efficient circuit switching. This design utilizes the unidirectional conduction characteristic of the step-down diode D2 to prevent the medium- and high-charge voltages from flowing back into the low-charge circuit, thereby avoiding mutual interference between circuits.

[0033] Typically, low-power circuits consume less power and are designed to be normally open to maintain basic functions; while medium- and high-power circuits consume more power and are only activated when needed. Users can manually switch the on / off states of these circuits using the medium- and high-power buttons, effectively avoiding unnecessary power waste. It should be noted that the medium- and high-power buttons are mechanical buttons. Mechanical buttons achieve circuit switching through physical pressure, offering advantages such as simple structure, sensitive response, and durability. Compared to touch buttons, mechanical buttons provide a clear tactile feedback, effectively preventing accidental touches and making them suitable for testing environments requiring frequent voltage level switching, thus improving operational accuracy and stability.

[0034] In some embodiments of this application, the low-power circuit further includes a capacitor C6, one end of which is connected to the output terminal of the voltage regulator U1, and the other end of which is grounded.

[0035] Specifically, in the low-power circuit, capacitor C6 is connected between the voltage regulator U1 and the ground terminal to ensure voltage stability, reduce noise and interference, and improve the overall performance and reliability of the circuit. It should be noted that the medium-power and high-power circuits also have capacitors connected between the voltage regulator and the ground terminal; the function of these capacitors is the same as that of capacitor C6 in the low-power circuit, and will not be elaborated upon further below.

[0036] In some embodiments of this application, the medium-power circuit includes a voltage regulator U2, a step-down diode D3, and a capacitor C2; the input terminal of the voltage regulator U2 is connected to the 5V DC power supply and one end of the capacitor C2, the other end of the capacitor C2 is connected to the ground terminal and the output analog battery voltage terminal, the ground terminal of the voltage regulator U2 is grounded through the step-down diode D3, and the output terminal of the voltage regulator U2 is connected to the output analog battery voltage terminal through the medium-power button.

[0037] Specifically, capacitor C2 filters the input power supply, stabilizing the power signal and reducing interference. Voltage regulator U2 regulates the 5V input voltage to a 3.3V output. Buck diode D3 raises the ground voltage of voltage regulator U2 by 0.3V. Medium charge button SW1 controls the on / off state of the output voltage of voltage regulator U2, enabling switching control of the medium charge circuit. When the user presses the medium charge button SW1, the output voltage of the medium charge circuit is 3.6V (3.3V + 0.3V = 3.6V), simulating a medium charge state. Normally, the voltage regulator's ground terminal is grounded, and the output voltage is fixed, such as 3.3V. If a diode is connected in series between the voltage regulator's ground terminal and the actual ground, when the diode is forward-biased, the voltage potential at the voltage regulator's ground terminal will be higher than the actual ground potential by the voltage drop across the diode (here, 0.3V). In other words, the voltage regulator's ground potential is raised by 0.3V. The voltage at the voltage regulator's output terminal relative to the actual ground will also increase by 0.3V accordingly. The voltage regulator has a nominal output of 3.3V. After raising the ground terminal by 0.3V, the final output voltage relative to the actual ground is 3.3V + 0.3V = 3.6V. It should be noted that a Schottky diode is preferred for the step-down diode D3 (its voltage drop across it is approximately 0.2-0.4V when forward-biased). This Schottky diode ensures a 0.3V rise in the ground terminal voltage, thus effectively increasing the output voltage of the voltage regulator U2.

[0038] In some embodiments of this application, the medium-power circuit further includes a capacitor C5, one end of which is connected to the output terminal of the voltage regulator U2, and the other end of which is grounded.

[0039] In some embodiments of this application, the medium-power circuit further includes a light-emitting diode (LED) and a resistor R1. One end of the LED is connected to a ground terminal, and the other end of the LED is connected to an output analog battery voltage terminal through the resistor R1.

[0040] Specifically, the LED serves as a status indicator, visually displaying the current on / off state of the medium-capacity circuit. When the medium-capacity circuit is on, the LED lights up, reminding the user that the current test capacity level is at the medium-capacity setting. Resistor R1 controls the current flowing through the LED to ensure it operates within a safe current range, preventing current fluctuations that could cause unstable LED brightness or damage, thus improving the overall safety of the circuit.

[0041] In some embodiments of this application, the high-capacity circuit includes a voltage regulator U3, a step-down diode D4, a step-down diode D5, and a capacitor C3; the input terminal of the voltage regulator U3 is connected to the 5V DC power supply and one end of the capacitor C3, the other end of the capacitor C3 is grounded, the ground terminal of the voltage regulator U3 is grounded through the step-down diode D5 and the step-down diode D4 in sequence, and the output terminal of the voltage regulator U3 is connected to the output analog battery voltage terminal through the high-capacity button.

[0042] Specifically, capacitor C3 filters the input power supply, stabilizing the power signal and reducing interference. Voltage regulator U3 regulates the 5V input voltage to a 3.3V output. Buck diodes D4 and D5 are connected in series, boosting the ground voltage of voltage regulator U3 by 0.6V. The high-charge button SW2 controls the on / off state of the voltage regulator U3's output voltage, thus controlling the high-charge circuit. When the user presses the high-charge button SW2, the final output voltage of the high-charge circuit is 3.9V (3.3V + 0.6V = 3.9V), simulating a high-charge state. It should be noted that both buck diodes D4 and D5 are preferably Schottky diodes.

[0043] In some embodiments of this application, the high-capacity circuit further includes a capacitor C4, one end of which is connected to the output terminal of the voltage regulator U3, and the other end of which is grounded.

[0044] In some embodiments of this application, the power display circuit includes three LEDs, all of which are connected to the power management circuit.

[0045] Specifically, the power display circuit includes three independently configured LEDs: a low battery indicator, a medium battery indicator, and a high battery indicator, used to visually indicate the three battery levels of the bone conduction hearing aid's lithium battery. During normal use, the corresponding indicator light automatically illuminates based on the actual battery level, helping the user understand the remaining charge. During the production testing phase of the bone conduction hearing aid, receiving simulated signals from different battery levels also illuminates the corresponding indicator lights, verifying the battery level display function. To enhance visibility, the three LEDs can be distinguished by different colors, such as red for low battery, yellow for medium battery, and green for high battery. Labels can also be affixed next to the LEDs to further clarify their meaning, allowing users to quickly identify the battery level and improving ease of use and accuracy. Furthermore, the power management circuit integrates an alarm circuit. When the remaining battery level reaches a low battery threshold (e.g., 3.3V), the alarm circuit activates a speaker or buzzer to issue a prompt voice or beep, reminding the user to replace or recharge the battery to ensure the normal operation of the bone conduction hearing aid.

[0046] The rapid testing device for displaying the lithium battery power of bone conduction hearing aids provided in this embodiment adopts three-level voltage simulation technology, which can efficiently and accurately test the power display function of the lithium battery of bone conduction hearing aids, significantly optimize the testing process and improve testing efficiency, and has stable and reliable performance with strong feasibility.

[0047] It should be noted that the technical solutions of the various embodiments of this utility model can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0048] The above description is only a part or preferred embodiment of this utility model. Neither the text nor the drawings should limit the scope of protection of this utility model. All equivalent structural transformations made using the content of this utility model specification and drawings under the overall concept of this utility model, or direct / indirect applications in other related technical fields, are included within the scope of protection of this utility model.

Claims

1. A rapid testing device for displaying the lithium battery power of a bone conduction hearing aid, wherein the bone conduction hearing aid includes a power management circuit and a power display circuit connected to each other, characterized in that, The bone conduction hearing aid lithium battery power display rapid testing device includes a low power circuit for outputting a voltage greater than or equal to 3.0V and less than 3.4V, a medium power circuit for outputting a voltage greater than or equal to 3.4V and less than 3.8V, a high power circuit for outputting a voltage greater than or equal to 3.8V and less than 4.2V, a medium power button for switching the medium power circuit on and off, and a high power button for switching the high power circuit on and off. In this circuit, one end of the low-power circuit, the medium-power circuit, and the high-power circuit are all connected to an external 5V DC power supply. The other end of the medium-power circuit is connected to one end of the medium-power button, and the other end of the high-power circuit is connected to one end of the high-power button. The other ends of the low-power circuit, the medium-power button, and the high-power button are all connected to the external power management circuit.

2. The rapid testing device for displaying lithium battery power in bone conduction hearing aids according to claim 1, characterized in that, The rapid testing device for displaying the lithium battery power of bone conduction hearing aids also includes the 5V DC power supply.

3. The rapid testing device for displaying lithium battery power in bone conduction hearing aids according to claim 1, characterized in that, The low-power circuit includes a voltage regulator U1, a step-down diode D1, a step-down diode D2, and a capacitor C1. The input terminal of the voltage regulator U1 is connected to the 5V DC power supply and one end of the capacitor C1. The other end of the capacitor C1 is connected to the input power supply ground, the ground terminal, and the output analog battery ground terminal. The ground terminal of the voltage regulator U1 is grounded through the step-down diode D1. The output terminal of the voltage regulator U1 is connected to the output analog battery voltage terminal through the step-down diode D2.

4. The rapid testing device for displaying lithium battery power in bone conduction hearing aids according to claim 3, characterized in that, The low-power circuit also includes a capacitor C6, one end of which is connected to the output terminal of the voltage regulator U1, and the other end of which is grounded.

5. The rapid testing device for displaying lithium battery power in bone conduction hearing aids according to claim 1, characterized in that, The medium-power circuit includes a voltage regulator U2, a step-down diode D3, and a capacitor C2. The input terminal of the voltage regulator U2 is connected to the 5V DC power supply and one end of the capacitor C2. The other end of the capacitor C2 is connected to the ground terminal and the output analog battery voltage terminal. The ground terminal of the voltage regulator U2 is grounded through the step-down diode D3. The output terminal of the voltage regulator U2 is connected to the output analog battery voltage terminal through the medium-power button.

6. The rapid testing device for displaying lithium battery power in bone conduction hearing aids according to claim 5, characterized in that, The medium-voltage circuit also includes a capacitor C5, one end of which is connected to the output terminal of the voltage regulator U2, and the other end of which is grounded.

7. The rapid testing device for displaying lithium battery power in bone conduction hearing aids according to claim 5, characterized in that, The medium-capacity circuit also includes a light-emitting diode (LED) and a resistor R1. One end of the LED is connected to the ground terminal, and the other end of the LED is connected to the output analog battery voltage terminal through the resistor R1.

8. The rapid testing device for displaying lithium battery power in bone conduction hearing aids according to claim 1, characterized in that, The high-capacity circuit includes a voltage regulator U3, a step-down diode D4, a step-down diode D5, and a capacitor C3. The input terminal of the voltage regulator U3 is connected to the 5V DC power supply and one end of the capacitor C3, respectively. The other end of the capacitor C3 is grounded. The ground terminal of the voltage regulator U3 is grounded through the step-down diodes D5 and D4 in sequence. The output terminal of the voltage regulator U3 is connected to the output of the analog battery voltage terminal through the high-capacity button.

9. The rapid testing device for displaying lithium battery power in bone conduction hearing aids according to claim 8, characterized in that, The high-capacity circuit also includes a capacitor C4, one end of which is connected to the output terminal of the voltage regulator U3, and the other end of which is grounded.

10. The rapid testing device for displaying lithium battery power in bone conduction hearing aids according to claim 1, characterized in that, The power display circuit includes three LEDs, all of which are connected to the power management circuit.

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