Composite energy storage equipment noise reduction system and noise optimization method

Abstract

The invention relates to a combined type energy storage equipment noise reduction system and a noise optimization method. The combined type energy storage equipment noise reduction system comprises a noise reduction cover body arranged corresponding to a refrigeration assembly, and a noise reduction control module is further arranged in the noise reduction cover body; the noise reduction cover body comprises a perforated aluminum plate and a split type sound absorption plate, the perforated aluminum plate is used as a high-frequency noise reflecting layer, the split type sound absorption plate is used as a medium-frequency noise dissipation layer, the noise reduction cover body further comprises a bottom vibration isolation module, and the bottom vibration isolation module is used as a low-frequency vibration isolation layer for restraining low-frequency vibration transmission; and combining to form a physical filtering noise reduction structure for suppressing broadband noise through a gradient structure.

Description

Technical Field

[0001] This invention relates to energy storage equipment and noise pollution optimization technology, specifically, to a noise reduction system and noise optimization method for a composite energy storage device. Background Technology

[0002] With the widespread deployment of energy storage devices in densely populated areas such as residential areas, existing industrial noise standards in certification are no longer sufficient to meet environmental comfort requirements. The liquid-cooled fans of energy storage devices are the primary noise source, and their low-frequency vibrations and high-frequency airflow noise make it difficult for a single noise reduction method to simultaneously meet both heat dissipation efficiency and full-frequency noise reduction requirements.

[0003] Therefore, it is essential to develop a high-efficiency, heat-dissipating, and compatible composite noise reduction solution to achieve an optimized upgrade from industrial-grade noise to environmentally friendly noise.

[0004] Therefore, it is necessary to provide a noise reduction system and noise optimization method for composite energy storage devices to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a noise reduction system and noise optimization method for composite energy storage devices.

[0006] One of the technical solutions is as follows: A noise reduction system for a composite energy storage device includes a noise reduction enclosure corresponding to the cooling component, and a noise reduction control module is also installed inside the noise reduction enclosure. The noise reduction enclosure includes a perforated aluminum plate and a segmented sound-absorbing plate. The perforated aluminum plate is used as a high-frequency noise reflection layer, and the segmented sound-absorbing plate is used as a mid-frequency noise dissipation layer. It also includes a bottom vibration isolation module, which is used as a low-frequency vibration isolation layer to suppress the transmission of low-frequency vibrations. The combination forms a physical filtering and noise reduction structure that suppresses broadband noise through a gradient structure.

[0007] Furthermore, the top air outlet surface of the fan in the composite energy storage device is fixed with a perforated aluminum plate by an L-shaped bracket.

[0008] Furthermore, inclined guide vanes are installed on the perforated aluminum plate to guide the lateral diffusion of exhaust air and avoid airflow turbulence noise.

[0009] Furthermore, the left, right, and rear sidewalls of the liquid cooler on the non-air inlet side of the composite energy storage device are fitted with segmented sound-absorbing panels.

[0010] Furthermore, the segmented sound-absorbing panels are fixed by magnetic strips, and sealing strips are installed at the joints of the segmented sound-absorbing panels for sealing.

[0011] Furthermore, the surface of the segmented sound-absorbing panel is wrapped with a flame-retardant layer, and a built-in temperature and humidity sensor is used to monitor the status of the segmented sound-absorbing panel.

[0012] Furthermore, the gap between the segmented sound-absorbing panel and the air inlet mesh of the composite energy storage device shall not be less than twice the thickness of the segmented sound-absorbing panel.

[0013] Furthermore, the bottom vibration isolation module is installed at the four support feet of the fan mounting base. It consists of bolts and damping pads. The damping pads completely cover the contact area between the support feet and the mounting surface. The compression amount is adjusted by the bolt preload to block the vibration transmission path.

[0014] Technical Solution Two; A method for noise optimization of a composite energy storage device, specifically including: 1) Physical filtering noise reduction: A noise reduction enclosure is set up, which includes a perforated aluminum plate and a segmented sound-absorbing plate. The perforated aluminum plate is used as a high-frequency noise reflection layer, and the segmented sound-absorbing plate is used as a mid-frequency noise dissipation layer. It also includes a bottom vibration isolation module, which is used as a low-frequency vibration isolation layer to suppress the transmission of low-frequency vibrations; forming a method of suppressing broadband noise through a gradient structure. 2) Noise is suppressed by increasing the compressor's cooling capacity and reducing the fan speed, forming a thermodynamic displacement noise reduction method; 3) Based on environmental noise, dynamically adjust thermodynamic displacement parameters to form a scene-aware adaptive collaborative noise reduction method.

[0015] Compared with existing technologies, this invention uses a gradient structure to suppress broadband noise through a physical filtering and noise reduction structure, effectively achieving physical noise reduction. The cooling enhancement component integrates a compressor, a temperature sensor, and a noise sensor. The control module adapts to the physical sound insulation structure through preset scenarios and dynamically adjusts the compressor's cooling capacity to achieve composite noise reduction and dynamically balance noise suppression and heat dissipation requirements. It achieves synergistic optimization of mechanical filtering and cooling capacity replacement without modifying the liquid chiller's main structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 This is a flowchart illustrating the thermodynamic displacement noise reduction mode.

[0018] Figure 3 yes Figure 2 One of the enlarged images.

[0019] Figure 4 yes Figure 2 The second enlarged image.

[0020] Figure 5 The flowchart illustrates the scene-aware adaptive collaborative noise reduction mode.

[0021] Figure 6 yes Figure 5 One of the enlarged images.

[0022] Figure 7 yes Figure 5 The second enlarged image. Detailed Implementation Example:

[0023] Please see Figure 1 This embodiment demonstrates a noise reduction system for a composite energy storage device, including a noise reduction enclosure 200 provided for the corresponding cooling component 100, and a noise reduction control module 300 is also provided inside the noise reduction enclosure 200. The noise reduction enclosure 200 includes a perforated aluminum plate 1 and a segmented sound-absorbing plate 2. The perforated aluminum plate 1 is used as a high-frequency noise reflection layer, and the segmented sound-absorbing plate 2 is used as a mid-frequency noise dissipation layer. It also includes a bottom vibration isolation module 3, which is used as a low-frequency vibration isolation layer to suppress the transmission of low-frequency vibrations. The combination forms a physical filtering and noise reduction structure that suppresses broadband noise through a gradient structure.

[0024] The top air outlet of the fan 4 of the composite energy storage device 400 is fixed with a perforated aluminum plate 1 by an L-shaped bracket.

[0025] An inclined guide vane is installed on the perforated aluminum plate 1 to guide the lateral diffusion of exhaust air and avoid airflow turbulence noise.

[0026] The liquid cooler of the composite energy storage device 400 has segmented sound-absorbing panels 2 installed on the left, right, and rear sidewalls of the non-air inlet side.

[0027] The segmented sound-absorbing panel 2 is fixed by magnetic strips, and the joints of the segmented sound-absorbing panel are sealed with sealing strips.

[0028] The surface of the segmented sound-absorbing panel 2 is wrapped with a flame-retardant layer and has a built-in temperature and humidity sensor to monitor the status of the segmented sound-absorbing panel.

[0029] The gap between the segmented sound-absorbing panel 2 and the air inlet mesh of the composite energy storage device shall not be less than twice the thickness of the segmented sound-absorbing panel.

[0030] The bottom vibration isolation module 3 is set at the four support feet of the mounting base of the fan 4. It includes bolts and damping pads. The damping pads completely cover the contact area between the support feet and the mounting surface. The compression amount is adjusted by the bolt preload to block the vibration transmission path.

[0031] This solution has the following features: 1) Physical filtering noise reduction mode: Perforated aluminum plates are used as a high-frequency noise reflector, segmented sound-absorbing panels are used as a mid-frequency noise dissipation layer, and bottom vibration isolation modules are used as a low-frequency vibration isolation layer to suppress the transmission of low-frequency vibrations; forming a method to suppress broadband noise through a gradient structure. The three-layer structure works in synergy to provide insertion loss for broadband noise without affecting air intake and exhaust. The structural parameters are fixed (and cannot be dynamically adjusted after installation). As the base layer for other noise reduction modes, it provides noise control margin for subsequent active noise reduction.

[0032] 2) Thermodynamic displacement noise reduction mode: The core principle utilizes the compressor's selection margin (designed cooling capacity exceeds actual cooling demand). Without overclocking the compressor, it reduces fan speed by increasing cooling capacity, thereby reducing noise intensity. This mode is activated when the system's external radiated noise still falls short of the target value after physical filtering noise reduction. Based on the principle of "cooling capacity redundancy replacing noise," it utilizes the compressor's inherent cooling capacity margin to reduce the fan's dependence on heat dissipation, thus reducing fan aerodynamic noise. This forms a composite noise reduction system of "passive filtering + active source reduction."

[0033] Its design logic is "compressor margin utilization → increased cooling capacity → reduced fan load → decreased speed → reduced aerodynamic noise". It replaces mechanical noise reduction with thermodynamic energy distribution and is suitable for medium to high noise-sensitive scenarios.

[0034] For implementation steps, please refer to [link / reference]. Figure 2-4 : Triggering conditions and compressor margin confirmation: The noise sensor is deployed at the equipment. It is triggered when the system’s external radiated noise after physical filtering and noise reduction is greater than the target threshold and the battery temperature sensor detects that the battery temperature is lower than the preset temperature. The electronic control system calculates the current cooling capacity through the compressor’s suction pressure sensor and discharge pressure sensor (201b), compares it with the design cooling capacity of the compressor under rated operating conditions, and confirms that there is a margin that can be safely used.

[0035] Cooling capacity enhancement and refrigerant flow regulation: The electronic control system sends instructions to the compressor to increase the load rate at the rated frequency; it also adjusts the opening of the electronic expansion valve to increase the refrigerant circulation volume and ensure stable evaporator superheat.

[0036] Fan speed reduction and noise closed-loop control: According to the basic rules of the linkage model: the initial load rate is 80%. For every 5% increase in cooling capacity, the fan speed is reduced by 4%. The evaporator convection fan speed is reduced in stages. A single noise sensor continuously monitors the system's external radiated noise. If it drops to the target value, the current speed is stabilized. If it still does not meet the target, the compressor load rate is increased to further reduce the fan speed. The temperature difference is monitored by a water temperature sensor. If the temperature difference is greater than the threshold, the fan speed regulation is paused and the opening of the electronic expansion valve is finely adjusted to ensure a balance between heat dissipation efficiency and noise control.

[0037] 3) Scene-aware adaptive collaborative noise reduction mode: It is a scene-aware collaborative noise reduction technology with an electronic control system at its core. It uses a built-in time module and an external light sensor to predict environmental sensitivity and dynamically adjust thermodynamic displacement parameters to solve the problem that traditional fixed noise reduction strategies cannot meet the contradictory needs of "strict noise reduction at night / priority heat dissipation during the day".

[0038] Its design logic is "environmental perception → target setting → dynamic ratio → effect verification". The electronic control system integrates time and light data to predict the scene (such as high sensitivity at night / low sensitivity during the day), sets differentiated noise targets, and adjusts the compressor and fan parameters to achieve a balance between noise and heat dissipation.

[0039] For implementation details, please refer to [link / reference]. Figure 5-7 : Environmental perception and triggering: The time module is built into the electronic control system and presets scene time periods (such as 22:00-6:00 at night as a high-sensitivity period and 6:00-22:00 during the day as a low-sensitivity period); the light sensor is deployed on the top of the device to detect the ambient brightness (to assist in verifying the scene, such as nighttime brightness <10 lux and daytime brightness >50 lux); the noise sensor is deployed at the device to detect the system's external radiated noise.

[0040] Trigger Judgment: The electronic control system integrates the time module and the light sensor to predict scene sensitivity: 1 hour before scene switching (e.g., 21:00 at night), if the light sensor detects a brightness of <15 lux, the C mode preparatory state is activated in advance (K value is adjusted to 1.0); when the noise sensor detects noise > the current scene target threshold (high sensitivity 50dB(A) / low sensitivity 55dB(A)), the formal trigger mode is activated.

[0041] The electronic control system dynamically adjusts the matching coefficient K based on the target noise value of the scene using the formula "fan speed reduction ratio = K × (current noise value - target noise value) / current noise value" (K = 1.2 for high-sensitivity scenes and K = 0.8 for low-sensitivity scenes). Based on the adjusted matching ratio, the electronic control system sends a command to the compressor to increase the load rate, and simultaneously controls the fan speed to reduce noise in stages for verification: the noise sensor continuously detects the noise, and if it drops to the scene target threshold, it stabilizes the current compressor and fan parameters; if it does not meet the target, it further increases the K value (maximum not exceeding 1.5) according to the "dynamic matching ratio adjustment algorithm" until it meets the target or triggers the safety threshold.

[0042] The battery temperature sensor monitors the battery temperature, and the water temperature sensor monitors the evaporator temperature difference. If either exceeds the limit, the system pauses the speed reduction and fine-tunes the opening of the electronic expansion valve to increase the refrigerant flow, ensuring heat dissipation safety. When the time module enters a low-sensitivity period or the light sensor detects a brightness >50 lux, the electronic control system automatically switches to the target noise threshold, resets the K value to 0.8, and controls the fan speed to return to the baseline value, prioritizing heat dissipation efficiency.

[0043] Compared with existing technologies, this invention uses a gradient structure to suppress broadband noise through a physical filtering and noise reduction structure, effectively achieving physical noise reduction. The cooling enhancement component integrates a compressor, a temperature sensor, and a noise sensor. The control module adapts to the physical sound insulation structure through preset scenarios and dynamically adjusts the compressor's cooling capacity to achieve composite noise reduction and dynamically balance noise suppression and heat dissipation requirements. It achieves synergistic optimization of mechanical filtering and cooling capacity replacement without modifying the liquid chiller's main structure.

[0044] For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this invention, and these all fall within the protection scope of this invention.

Claims

1. A noise reduction system for a composite energy storage device, characterized in that: It includes a noise reduction enclosure for the corresponding cooling components, and a noise reduction control module is also installed inside the noise reduction enclosure; The noise reduction enclosure includes a perforated aluminum plate and a segmented sound-absorbing plate. The perforated aluminum plate is used as a high-frequency noise reflection layer, and the segmented sound-absorbing plate is used as a mid-frequency noise dissipation layer. It also includes a bottom vibration isolation module, which is used as a low-frequency vibration isolation layer to suppress the transmission of low-frequency vibrations. The combination forms a physical filtering and noise reduction structure that suppresses broadband noise through a gradient structure.

2. The noise reduction system for a composite energy storage device according to claim 1, characterized in that: The top air outlet of the fan in the composite energy storage device is fixed with a perforated aluminum plate by an L-shaped bracket.

3. The noise reduction system for a composite energy storage device according to claim 2, characterized in that: Inclined guide vanes are installed on the perforated aluminum plate to guide the lateral diffusion of exhaust air and avoid airflow turbulence noise.

4. The noise reduction system for a composite energy storage device according to claim 3, characterized in that: The left, right, and rear sidewalls of the liquid cooler of the composite energy storage device are equipped with segmented sound-absorbing panels.

5. The noise reduction system for a composite energy storage device according to claim 4, characterized in that: The segmented sound-absorbing panels are fixed by magnetic strips, and sealing strips are installed at the joints of the segmented sound-absorbing panels for sealing.

6. The noise reduction system for a composite energy storage device according to claim 5, characterized in that: The surface of the segmented sound-absorbing panel is covered with a flame-retardant layer, and a built-in temperature and humidity sensor is used to monitor the status of the segmented sound-absorbing panel.

7. The noise reduction system for a composite energy storage device according to claim 6, characterized in that: The gap between the segmented sound-absorbing panel and the air inlet mesh of the composite energy storage device shall not be less than twice the thickness of the segmented sound-absorbing panel.

8. The noise reduction system for a composite energy storage device according to claim 7, characterized in that: The bottom vibration isolation module is located at the four support feet of the fan mounting base. It consists of bolts and damping pads. The damping pads completely cover the contact area between the support feet and the mounting surface. The compression amount is adjusted by the bolt preload to block the vibration transmission path.

9. A method for noise optimization of a composite energy storage device, characterized in that: Noise reduction using the composite energy storage device noise reduction system described in claim 8 specifically includes: 1) Physical filtering noise reduction: A noise reduction enclosure is set up, which includes a perforated aluminum plate and a segmented sound-absorbing plate. The perforated aluminum plate is used as a high-frequency noise reflection layer, and the segmented sound-absorbing plate is used as a mid-frequency noise dissipation layer. It also includes a bottom vibration isolation module, which is used as a low-frequency vibration isolation layer to suppress the transmission of low-frequency vibrations; forming a method of suppressing broadband noise through a gradient structure. 2) Noise is suppressed by increasing the compressor's cooling capacity and reducing the fan speed, forming a thermodynamic displacement noise reduction method; 3) Based on environmental noise, dynamically adjust thermodynamic displacement parameters to form a scene-aware adaptive collaborative noise reduction method.

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