Sound system for two-wheeled electric vehicle

Abstract

The utility model discloses a kind of sound waves of two-wheeled electric vehicle, it is related to electric vehicle technical field, sound includes power module, hub control module, sound wave adjusting module and electric vehicle APP, power module is used to convert electric vehicle original vehicle battery voltage into required working voltage, and the rest module of sound is powered;Hub control module is used to obtain real-time vehicle speed from vehicle end ECU, and under automatic adjustment mode, vehicle speed is converted into corresponding voltage signal, and is transmitted to sound wave adjusting module;Sound wave adjusting module is used to control double loudspeaker switching according to voltage signal and issue corresponding volume warning sound;Electric vehicle APP is wirelessly connected with sound wave adjusting module, for uploading custom sound wave data, custom sound wave data is stored in the storage chip of sound wave adjusting module.The sound adapts multiple models of electric vehicle, can realize the sound wave control of "low speed high frequency high sound, high speed low frequency low sound", both avoid driving safety hidden danger, and meet city noise control requirements.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle technology, and in particular to a sound system for two-wheeled electric vehicles. Background Technology

[0002] Currently, audio equipment for two-wheeled electric vehicles suffers from two major pain points, failing to meet market demands and user safety requirements: 1. Compatibility limitations: Most audio systems are customized for specific car models and are only compatible with a single power supply specification (such as only supporting 48V or 60V). Installation requires modification of the original vehicle circuit. They cannot flexibly match two-wheeled electric vehicles of different brands and battery specifications, resulting in extremely poor versatility and increased user costs. 2. Limited sound output function: It can only play music or warning sounds at a fixed volume, and cannot dynamically adjust according to driving scenarios, nor can it meet users' needs for personalized sound effects (such as simulated fuel engine sounds or custom warning sounds).

[0003] To address the aforementioned issues, there is an urgent need for a sound system for two-wheeled electric vehicles that combines universal compatibility, scene-specific sound adjustment, and outdoor durability, balancing safety, noise reduction, and personalization needs. Utility Model Content

[0004] To address the aforementioned problems and technical needs, the inventor has proposed a sound system for two-wheeled electric vehicles, achieving a sound control mode of "high frequency and high volume at low speeds, and low frequency and low volume at high speeds." The technical solution of this invention is as follows: 1. A sound system for a two-wheeled electric vehicle, comprising: The power module is used to convert the original battery voltage (36V-96V) of the electric vehicle to the required operating voltage (12V) and to power the other modules of the audio system. The central control module is used to obtain the real-time vehicle speed from the vehicle ECU and convert the vehicle speed into a corresponding voltage signal in automatic adjustment mode, which is then transmitted to the sound adjustment module. The sound level adjustment module is used to control the dual speakers to switch and emit warning sounds of appropriate volume based on the voltage signal. The electric vehicle app connects wirelessly to the sound adjustment module to upload custom sound data, which is stored in the module's storage chip.

[0005] Its further technical solution is that the sound wave adjustment module includes: The first and second comparison units are used to compare the voltage signal V_speed with their respective voltage thresholds and output corresponding logic level signals; the first voltage threshold V1 is set to be less than the second voltage threshold V2. The control unit is used to select the corresponding volume control circuit based on the logic level signal. The three-channel volume control circuit is used to generate signals corresponding to the frequency and volume in the low-speed range, the medium-speed range, and the high-speed range, respectively, and then amplified by the power amplifier and transmitted to the dual speakers. Dual speakers are used to transmit the warning sound generated by the selected volume control circuitry.

[0006] 2. Working Principle (1) Power supply start-up process: The original battery of the electric vehicle (36V-96V) is input to the power module through the universal DC plug. The voltage is converted to a stable 12V output by the XL4015 voltage regulator chip and sent to the power supply terminals of the central control module (STM32F103C8T6) and the sound adjustment module (STM32F407VET6, Winbond-W25Q128JV, Hivi M10 speaker). After the device is powered on, the indicator light turns green and stays on, and each chip enters the standby state (power consumption ≤1W).

[0007] (2) Automatic sound adjustment process: The central control module reads the vehicle speed data of the electric vehicle ECU in real time through the one-line bus and converts it into a corresponding voltage signal; the threshold comparison unit of the sound adjustment module outputs different level signal combinations according to the comparison results of the voltage signal and their respective voltage thresholds, corresponding to different vehicle speed ranges: if V_speed≤V1 (e.g., current vehicle speed≤20km / h), the control unit selects the first volume control circuit to connect to the Hivi M10 speaker and plays at a volume of 70-80dB to improve the warning recognition; if V1<V_speed<V2 (e.g., 20km / h<current vehicle speed<40km / h), the control unit selects the second volume control circuit to connect to the Hivi M10 speaker and plays at a volume of 55dB; if V_speed≥V2 (e.g., current vehicle speed≥40km / h), the control unit selects the third volume control circuit to connect to the Hivi M10 speaker and plays at a volume of 40-50dB to reduce noise pollution at high speeds.

[0008] (3) Manual sound adjustment process: The user presses the "function button" (such as the mode button and volume + / - button) on the electric vehicle. The mode button sends a "mode switching signal" to the central control module, and the control module enters the manual control mode. In this mode, each time the "mode switching signal" is received, the control unit STM32F407VET6 will be triggered to call the next pre-stored sound data from the storage unit W25Q128JV (such as switching from "simulated engine sound" to "light music background sound"). In addition, the user can upload a custom sound file (MP3 format) through the electric vehicle APP. The file is transmitted to the STM32F407VET6 via the Bluetooth module (HC-05) and then written to the W25Q128JV through the SPI interface to complete the addition of the custom sound. It can be switched and called by the "mode button" next time.

[0009] The beneficial technical effects of this utility model are: 1. Wide compatibility: The power module is compatible with 36V / 48V / 60V / 72V / 84V / 96V original vehicle batteries, covering more than 95% of two-wheeled electric vehicles (including electric bicycles and electric motorcycles) on the market, without distinguishing between vehicle models and brands; 2. Balance between safety and noise reduction: The sound adjustment module can dynamically optimize the sound according to vehicle speed, enhancing warning at low speeds (70-80dB) and reducing noise at high speeds (40-50dB), thus avoiding driving safety hazards and meeting urban noise control requirements; 3. Excellent user experience: Supports dual-end adjustment via physical buttons and electric vehicle APP, and allows for custom upload of sound files; IPX6 waterproof design is suitable for driving in rainy weather, and the audio modules are powered by the original vehicle without frequent charging, ensuring a smooth driving experience; 4. Controllable cost: The core components are selected from mature mass-produced models (such as STM32 series microcontrollers and general-purpose speakers), with simple structure and easy mass production. The cost per unit is controllable and suitable for large-scale promotion. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the sound system for a two-wheeled electric vehicle provided in this application.

[0011] Figure 2 This is a schematic diagram of the sound wave adjustment module provided in this application. Detailed Implementation

[0012] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0013] One embodiment of this application provides a sound system for a two-wheeled electric vehicle, such as... Figure 1As shown, the audio system includes a housing, a central control module, a sound adjustment module, a power module, and an electric vehicle app. The power module converts the electric vehicle's original battery voltage to the required operating voltage and supplies power to the other modules of the audio system. The central control module obtains the real-time vehicle speed from the vehicle's ECU and, in automatic adjustment mode, converts the speed into a corresponding voltage signal, which is then transmitted to the sound adjustment module. The sound adjustment module controls the dual speakers to switch and emit warning sounds of appropriate volume based on the voltage signal. The electric vehicle app wirelessly connects to the sound adjustment module to upload custom sound data, which is stored in the module's storage chip. This embodiment provides both manual and automatic sound adjustment modes to meet different needs. Manual adjustment allows for sound switching and volume adjustment via function buttons on the electric vehicle, while automatic adjustment is achieved through the sound adjustment module. The functions and connections of each module are as follows: (1) Speaker housing The speaker housing is made of ABS and PC composite plastic with a nano-level waterproof coating, achieving an overall protection level of IPX6. It can withstand 30kPa water pressure splashes from any direction for 3 minutes without water damage. The housing surface has pre-drilled n M3 mounting holes, suitable for common mounting positions on the front, side, or rear of two-wheeled electric vehicles, without affecting riding operation or original vehicle functions (such as brakes and steering).

[0014] In this embodiment, ABS accounts for 70%, PC accounts for 30%, the waterproof coating thickness is 5-8μm, and n=4. The outer shell is made of ABS+PC composite material with an IPX6 waterproof coating. The core components of the module (such as the speaker and the main control chip) are all waterproof, solving the industry pain point of easy damage during outdoor rainy days.

[0015] (2) Sound wave adjustment module This module, responsible for generating, storing, and playing sound signals, is the core functional module. It includes at least two comparison units, a control unit, a three-way volume control circuit, and two speakers, with connections as follows: Figure 2 As shown, the first and second comparison units compare the voltage signal V_speed corresponding to the current vehicle speed with their respective voltage thresholds and output corresponding logic level signals. The control unit selects the corresponding volume control circuit based on the logic level signal. The three volume control circuits generate signals corresponding to the frequency and volume in the low-speed range, the medium-speed range, and the high-speed range, respectively. These signals are amplified by a power amplifier and transmitted to the dual speakers, which then transmit the warning sound generated by the selected volume control circuit.

[0016] Specifically, let 20 km / h correspond to 5V and 40 km / h correspond to 10V, thus achieving a linear mapping of "vehicle speed → voltage", i.e., V1 = 5V, V2 = 10V. When V_speed ≤ V1, the current vehicle speed is in the low-speed range, and the first comparison unit outputs a high-level signal H1 and the second comparison unit outputs a low-level signal L2; when V1 < V_speed < V2, the current vehicle speed is in the medium-speed range, and the first comparison unit outputs a low-level signal L1 and the second comparison unit outputs a low-level signal L2; when V_speed ≥ V2, the current vehicle speed is in the high-speed range, and the first comparison unit outputs a low-level signal L1 and the second comparison unit outputs a high-level signal H2.

[0017] The control unit selects the corresponding volume control circuit based on the comparator output. Each volume control circuit is implemented based on an oscillator and preamplifier of different frequencies. Specifically: when the low-speed range (H1=1, L2=0) is determined, the control unit turns on the high-frequency oscillator and high-gain preamplifier (1) of the first volume control circuit. The high-frequency oscillator outputs a high-frequency signal greater than the first frequency threshold (e.g., 1kHz), which is then output by the preamplifier (1) to produce a volume of 70-80dB, thereby improving the warning recognition. When the medium-speed range (L1=0, L2=0) is determined, the control unit turns on the intermediate-frequency oscillator and medium-gain preamplifier (2) of the second volume control circuit. The intermediate-frequency oscillator outputs an intermediate-frequency signal near the second frequency threshold (e.g., 500Hz), which is then output by the preamplifier (2) to produce a volume of 55dB. When the high-speed range (L1=0, L2=0) is determined, the control unit turns on the intermediate-frequency oscillator and medium-gain preamplifier (2) of the second volume control circuit. The intermediate-frequency oscillator outputs an intermediate-frequency signal near the second frequency threshold (e.g., 500Hz), which is then output by the preamplifier (2) to produce a volume of 55dB. When H2=1), the control unit turns on the low-frequency oscillator and low-gain preamplifier (3) of the third volume control circuit. The low-frequency oscillator outputs a low-frequency signal that is less than the third frequency threshold (such as 200Hz). After passing through the preamplifier (3), it outputs a volume of 40-50dB, thereby reducing noise interference when driving at high speed.

[0018] In this embodiment, to further realize the overspeed threshold judgment and alarm signal triggering functions, a third comparison unit, a fourth volume control circuit, and a latching circuit are also included in the original circuit described above, such as... Figure 2 As shown. The third comparison unit is used to compare the voltage signal V_speed with the third voltage threshold V3 and output the corresponding logic level signal. The addition of a latch circuit can avoid overspeed critical point jitter. The fourth volume control circuit is used to generate the overspeed corresponding frequency and volume signal, and transmit it to the dual speakers after being amplified by the power amplifier. The control unit is used to preferentially select the fourth volume control circuit when it receives the high-level signal output by the third comparison unit.

[0019] Specifically, the set terminal S of the latch circuit is connected to the output of the third comparator unit, and the reset terminal R is connected to the input and received voltage signal of the third comparator unit. The reset threshold is set to the difference between the third voltage threshold V3 and the hysteresis voltage ΔV. The output terminal of the latch circuit is connected to the control unit. Assuming that the upper limit speed of 60km / h corresponds to 15V, that is, V3=15V, when V_speed≥V3, the third comparator unit outputs a high-level signal (H3=1), at which time the electric vehicle is speeding. The control unit turns on the ultra-high frequency oscillator and the ultra-high gain preamplifier (4) of the fourth volume control circuit. The ultra-high frequency oscillator outputs a high-frequency signal greater than the fourth frequency threshold (such as 2kHz), which is then output by the preamplifier (4) at a volume greater than 85dB. The latching circuit is used to continuously output a high-level signal to the control unit when the third comparison unit first outputs a high-level signal (i.e., the vehicle speed first exceeds 60km / h) to latch the overspeed state. Even if the vehicle speed fluctuates slightly around 60km / h (e.g., 59→61→59), the alarm state will not switch frequently until V_speed≤V3-ΔV (e.g., the vehicle speed drops below 55km / h). At this time, the latching circuit is triggered to reset and output a low-level signal L3 to the control unit to cancel the overspeed alarm and prevent the voltage signal from repeatedly triggering the overspeed alarm due to jitter.

[0020] In this embodiment, the control unit uses an STM32F407VET6 microcontroller with a 32-bit ARM Cortex-M4 core, a clock speed of 168MHz, and 1MB of built-in Flash memory. It is responsible for reading and decoding sound data and controlling the volume. It supports MP3 and WAV sound file formats and can process two sound signals simultaneously (compatible with symmetrical dual-speaker output). The decoding latency is ≤100ms, ensuring smooth sound switching. The storage chip is a Winbond-W25Q128JV serial flash memory with a 16GB capacity, supporting a high-speed SPI interface (up to 104MHz), a write / erase cycle life of ≥100,000 times, and a data retention time of ≥20 years. It pre-stores three basic sound data types (simulating a gasoline motorcycle engine sound, a low-frequency warning sound, and light background music) and allows users to add / delete custom sound files (each file ≤50MB) via the control unit. The dual speakers use two Hivi M10 full-range waterproof speakers with parameters of 4Ω impedance and 5W rated power, and support IPX6 waterproof rating; they adopt a directional sound output design (sound wave diffusion angle ≤60°) to concentrate the sound waves to propagate in a 120° range in front of the vehicle, reducing noise interference to the rider's ears (rider's ear noise ≤55dB), making them suitable for outdoor riding environments.

[0021] (3) Central control module As the core "central hub" of the audio system, it is electrically connected to the control unit of the sound adjustment module, external function buttons (via GPIO interface), and power module (via ADC interface). The central control module communicates with the electric vehicle ECU via a one-wire bus to obtain data such as vehicle speed and battery level in real time, ensuring precise synchronization of the automatic adjustment logic. When the central control module receives a signal from the function buttons, it switches from automatic adjustment mode to manual control mode. In manual control mode, the sound adjustment module cyclically recalls pre-stored sound data.

[0022] Specifically, the function buttons include a mode button and volume + / - buttons. Users can short-press the "mode button" to send a "mode switching signal" to the central control module. In manual control mode, each received "mode switching signal" triggers the sound wave adjustment module's control unit to retrieve the next pre-stored sound wave data from the storage unit. This data is then amplified by the power amplifier and transmitted to the dual speakers, thus cycling through the sound wave modes (the speakers emit a 1-second 1kHz beep during switching). Long-pressing the "volume + / - buttons" sends a "volume adjustment signal" to the central control module. In manual control mode, this triggers the control unit to select the second volume control circuit. By adjusting the feedback resistor of this circuit, the gain is changed, thereby controlling the output decibel adjustment, achieving stepless volume adjustment (0-100dB). Users can also connect to the audio system's Bluetooth module via an electric vehicle app (supporting Android 8.0+ and iOS 12.0+) to upload custom sound wave files, preset common modes, or view real-time volume.

[0023] Optionally, the function buttons can be set independently or combined with the functions of the existing buttons on the electric vehicle.

[0024] In this embodiment, the central control module uses an STM32F103C8T6 microcontroller with a 32-bit ARM Cortex-M3 core, a 72MHz clock speed, and 64KB of built-in Flash memory. It features a self-diagnostic function: when the power supply voltage is less than 30V or greater than 100V, or when the speaker is short-circuited, it automatically cuts off the output and issues a 1kHz buzzer (lasting 2 seconds) as a warning, while the indicator light flashes red.

[0025] Combining manual adjustment via physical buttons and an app with automatic adjustment based on vehicle speed, it not only meets users' personalized needs but also takes into account the safety and noise reduction requirements of different driving scenarios, forming a differentiated technological advantage.

[0026] (4) Power module The power module input connects to the original electric vehicle battery via a universal DC connector (equipped with a reverse polarity protection diode), eliminating the need to distinguish between positive and negative terminals. It supports voltage conversion for the original electric vehicle battery within the range of 36V-96V (e.g., compatible with 36V / 48V / 60V / 72V / 84V / 96V). The output connects to the power supply terminals of the central control module, sound adjustment module, and Bluetooth module, providing stable operating voltages. In this embodiment, the power module uses a DC-DC voltage regulator circuit based on the XL4015 chip. Its core parameters are an input voltage of 30-100V, an output voltage of 12V, and an output current of 1A. It features overcurrent protection (2A protection), overvoltage protection (15V protection), and overheat protection (120℃ protection). The full-load power consumption is no more than 10W, which does not affect the electric vehicle's range (range loss ≤2% / 100km). The advantage of this module is that it is compatible with 36V-96V original car batteries. With the reverse-connection universal DC plug, it can be adapted to different car models without the need for an additional transformer, breaking through the limitation of the existing audio system's "power supply specification binding".

[0027] Based on the above module descriptions, the two-wheeled electric vehicle sound system provided in this embodiment breaks through the "vehicle-specific" limitation of existing sound systems, is compatible with two-wheeled electric vehicles with different power supply specifications from 36V to 96V, requires no additional transformer or circuit modification, and lowers the adaptation threshold; it provides a dual sound control scheme of "automatic scene adjustment + manual customization" to meet the safety needs of different driving scenarios and users' personalized preferences; it solves the problems of waterproofing, noise control and equipment durability in outdoor use, and is suitable for complex environments such as rainy days and urban roads.

[0028] In actual use, the casing is easy to install. When connecting to the power supply, connect the speaker's main wiring to the corresponding wiring on the electric vehicle. Once the indicator light turns green, it is considered normal. For manual adjustment, short press the "Mode" button to cycle through "Simulated Engine Sound → Low-Frequency Warning Sound → Light Music Background Sound → Custom Sound". The speaker will emit a 1-second beep during switching. Long press the "Volume +" button to increase the volume (maximum 100dB, indicator light flashes when volume ≥ 80dB). Long press the "Volume -" button to decrease the volume (minimum 0dB, mute). Turn on your phone's Bluetooth, search for the "YD-Sound" device and connect. Enter the "Sound Management" interface of the APP, click "Upload File", select a local MP3 / WAV file (≤50MB), and it will be automatically added to the "Custom Sound" mode after uploading. When in automatic adjustment mode, the automatic adjustment mode is enabled by default after the audio system is powered on, and there is no need to manually turn it on. When riding, the central control module obtains the vehicle speed through the ECU and automatically adjusts the sound parameters in conjunction with the sound adjustment module. If you need to turn off the automatic adjustment mode, you can press and hold the "Mode button + Volume - button" for 3 seconds. The indicator light will change from green to orange, switching to manual control mode. Press and hold the button again for 3 seconds to restore the automatic adjustment mode.

[0029] The above descriptions are merely preferred embodiments of this application, and the present invention is not limited to the above embodiments. It is understood that other improvements and variations that can be directly derived or conceived by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included within the protection scope of the present invention.

Claims

1. A sound system for a two-wheeled electric vehicle, characterized in that, The audio system includes: The power module is used to convert the original battery voltage of the electric vehicle into the required operating voltage and to power the other modules of the audio system. The central control module is used to obtain the real-time vehicle speed from the vehicle ECU and convert the vehicle speed into a corresponding voltage signal in automatic adjustment mode, which is then transmitted to the sound adjustment module. The sound intensity adjustment module is used to control the dual speakers to switch and emit warning sounds of corresponding volumes according to the voltage signal; The electric vehicle APP is wirelessly connected to the sound adjustment module and is used to upload custom sound data, which is stored in the storage chip of the sound adjustment module.

2. The sound system for a two-wheeled electric vehicle according to claim 1, characterized in that, The sound wave adjustment module includes: The first and second comparison units are used to compare the voltage signal with their respective voltage thresholds and output corresponding logic level signals; the first voltage threshold is set to be less than the second voltage threshold. A control unit is used to select the corresponding volume control circuit according to the logic level signal; The three-channel volume control circuit is used to generate signals corresponding to the frequency and volume in the low-speed range, the medium-speed range, and the high-speed range, respectively, and then amplified by a power amplifier and transmitted to the dual speakers. The dual speakers are used to transmit the warning sound generated by the selected volume control circuit.

3. The sound system for a two-wheeled electric vehicle according to claim 2, characterized in that, When the voltage signal is not greater than the first voltage threshold, the current vehicle speed is in the low speed range. At this time, the first comparison unit outputs a high-level signal and the second comparison unit outputs a low-level signal. The control unit selects the first volume control circuit. When the voltage signal is greater than the first voltage threshold and less than the second voltage threshold, the current vehicle speed is in the medium speed range, the first comparison unit outputs a low-level signal, the second comparison unit outputs a low-level signal, and the control unit selects the second volume control circuit. When the voltage signal is not less than the second voltage threshold, the current vehicle speed is in the high-speed range, the first comparison unit outputs a low-level signal, the second comparison unit outputs a high-level signal, and the control unit selects a third volume control circuit.

4. The sound system for a two-wheeled electric vehicle according to claim 2, characterized in that, The sound wave adjustment module also includes: a third comparison unit and a fourth volume control circuit; The third comparison unit is used to output a high-level signal when the voltage signal is not less than a third voltage threshold, at which time the electric vehicle is speeding; the third voltage threshold is set to be greater than the second voltage threshold. The fourth volume control circuit is used to generate a signal corresponding to the overspeed frequency and volume, and then transmits it to the dual speakers after being amplified by a power amplifier. The control unit is configured to preferentially select the fourth volume control circuit when it receives a high-level signal output by the third comparison unit.

5. The sound system for a two-wheeled electric vehicle according to claim 4, characterized in that, The sound wave adjustment module also includes a latching circuit; The set terminal of the latch circuit is connected to the output of the third comparison unit; The reset terminal of the latch circuit is connected to the input of the third comparison unit and receives the voltage signal. The reset threshold is set to the difference between the third voltage threshold and the hysteresis voltage. The output of the latch circuit is connected to the control unit; The latching circuit is used to continuously output a high-level signal to the control unit when the third comparison unit first outputs a high-level signal to latch the overspeed state until the voltage signal is not greater than the reset threshold. Then, the trigger circuit resets and outputs a low-level signal to the control unit to release the overspeed alarm.

6. The sound system for a two-wheeled electric vehicle according to claim 4, characterized in that, Each volume control circuit is implemented based on an oscillator and preamplifier of different frequencies, wherein: The high-frequency oscillator of the first volume control circuit outputs a high-frequency signal greater than the first frequency threshold, which is then output as a volume of 70-80dB by the preamplifier (1). The intermediate frequency oscillator of the second volume control circuit outputs an intermediate frequency signal near the second frequency threshold, which is then output as a volume of 55dB by the preamplifier (2). The low-frequency oscillator of the third volume control circuit outputs a low-frequency signal that is less than the third frequency threshold, which is then output as a volume of 40-50dB by the preamplifier (3). The high-frequency oscillator of the fourth volume control circuit outputs a high-frequency signal greater than the fourth frequency threshold, which is then output by the preamplifier (4) at a volume greater than 85dB. Among them, the fourth, first, second and third frequency thresholds decrease sequentially.

7. The sound system for a two-wheeled electric vehicle according to claim 1, characterized in that, The electric vehicle is equipped with function buttons, and the central control module is used to switch from the automatic adjustment mode to the manual control mode when it receives a signal provided by the function buttons; The sound wave adjustment module is also used to cyclically recall pre-stored sound wave data in the manual control mode.

8. The sound system for a two-wheeled electric vehicle according to claim 1, characterized in that, The power module adopts a DC-DC voltage regulator circuit based on the XL4015 chip. The input end is connected to the original battery of the electric vehicle, and the output end is connected to the power supply end of the central control module and the sound adjustment module respectively. The circuit has overcurrent protection, overvoltage protection and overheat protection functions, and supports voltage conversion of the original battery voltage of the electric vehicle in the range of 36V-96V.

9. The sound system for a two-wheeled electric vehicle according to claim 1, characterized in that, The speaker housing is made of ABS and PC composite plastic shell, with a nano-level waterproof coating sprayed on the surface, and the overall protection level reaches IPX6. The housing surface has n M3 mounting holes pre-drilled to fit the mounting positions on the front, side, or rear of a two-wheeled electric vehicle.

10. The sound system for a two-wheeled electric vehicle according to claim 2, characterized in that, The central control module is implemented based on the STM32F103C8T6 chip, the control unit is implemented based on the STM32F407VET6 chip, the storage chip is implemented based on the Winbond-W25Q128JV chip, and the dual speakers are two Hivi M10 speakers.

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