Vibration type battery liquid cooling device and method thereof

Abstract

The invention discloses a vibration type battery liquid cooling device and a method thereof.The vibration type battery liquid cooling device comprises a sealing box body containing cooling liquid, a battery, a temperature adjusting assembly, a water pump, a vibration assembly and a controller, a gas cavity is formed between the upper surface of the cooling liquid and the inner top wall of the sealing box body, and the battery is detachably installed in the sealing box body and immersed in the cooling liquid; the temperature adjusting assembly is arranged on the inner wall of the sealing box body, the vibration assembly is arranged at the bottom of the outer side of the sealing box body, a water inlet and a water outlet lower than the water inlet are formed in the two sides of the sealing box body respectively, and the water inlet and the water outlet are connected with the water pump through pipelines respectively to form a circulating water path. The controller is in signal connection with the temperature adjusting assembly, the water pump and the vibration assembly. On the basis of circulating water cooling of a traditional battery, vibration generated by the vibration exciter installed below the sealed box body promotes instability of a temperature boundary layer in cooling liquid, the convection heat exchange efficiency of flowing is improved along with enhancement of vibration strength, and the cooling efficiency is improved.

Description

Technical Field

[0001] The present invention relates to a vibration type battery liquid cooling device and its method, belonging to the technical field of energy storage battery thermal management. Background Art

[0002] As an important direction of battery thermal management, the immersion liquid cooling technology directly immerses the battery in an insulating coolant, and realizes heat transfer through the direct contact between the liquid and the battery surface. However, this technology still faces the bottleneck problem of insufficient cooling efficiency in engineering applications, that is, the stable temperature boundary layer formed between the battery surface and the coolant is difficult to effectively break, hindering the two-way heat exchange.

[0003] During the refrigeration process, when the coolant flows through the surface of the high-temperature battery, affected by the fluid viscous force and heat conduction characteristics, a temperature boundary layer will be formed at the contact interface. Due to the velocity gradient distribution of this layer of fluid, it presents an almost static flow state near the battery wall surface, and heat can only diffuse slowly through molecular heat conduction. As the battery continues to generate heat during operation, the temperature gradient in the boundary layer gradually increases, but its stable laminar flow characteristics make this region a natural barrier to heat exchange. Especially in the scenarios of high-rate discharge or rapid charging of the battery, the sharp accumulation of local heat will further thicken the boundary layer, forming a "heat insulation film" effect, seriously weakening the real-time adjustment ability of the cooling system.

[0004] When heating the battery in a low-temperature environment, when the temperature-rising fluid heated externally flows through the surface of the low-temperature battery, the high-temperature fluid close to the battery wall surface forms an inverse temperature gradient due to the rapid release of heat. At this time, the natural convection caused by the change in fluid density in the boundary layer is weak, and heat still needs to penetrate the boundary layer slowly by conduction, resulting in a significant reduction in the battery preheating efficiency. In the stable region of the boundary layer, heat is easily accumulated in the local fluid, easily causing the temperature of the fluid in contact with the battery surface to rise abnormally, while the adjacent region is still in a low-temperature state, resulting in uneven temperature distribution within the battery pack. This inverse thermal resistance effect also faces problems such as thermal response lag, increased energy consumption, and uneven temperature distribution under the heating condition. Summary of the Invention

[0005] Object of the Invention: Aiming at the deficiencies existing in the prior art, the present invention provides a vibration type battery liquid cooling device and its method. By adding a vibration component at the bottom of the box body in the traditional battery liquid cooling system, the temperature boundary layer is broken, thereby improving the convective heat transfer efficiency.

[0006] Technical solution: A vibration-type battery liquid cooling device, comprising a sealed box filled with coolant, a battery, a temperature adjustment component, a water pump, a vibration component, and a controller. A gas cavity is provided between the upper surface of the coolant and the inner top wall of the sealed box. The battery is detachably installed in the sealed box and immersed in the coolant. The temperature adjustment component is arranged on the inner wall of the sealed box, and the vibration component is arranged on the bottom of the outer side of the sealed box. A water inlet and a water outlet below the water inlet are respectively provided on both sides of the sealed box. The water inlet and the water outlet are respectively connected to the water pump through pipes to form a circulating water circuit. The controller is respectively connected to the temperature adjustment component, the water pump, and the vibration component signals.

[0007] The present invention, on the basis of traditional battery circulating water cooling, sets a vibration component at the bottom of the sealed box. By vibrating the sealed box, the coolant in the box also vibrates to produce shearing effect, thereby causing the temperature boundary layer between the battery and the coolant to become unstable, that is, destroying the temperature boundary layer, allowing sufficient convective heat exchange. The convective heat exchange efficiency increases with the increase of vibration intensity, thereby significantly improving the cooling efficiency of the battery.

[0008] Preferably, in order to achieve destruction of the temperature boundary layer, the vibration assembly includes an exciter connected to the outer bottom of the sealed box body, and also includes a rigid spring arranged at the outer bottom of the sealed box body.

[0009] By starting the vibrator to vibrate the sealed box, the rigid spring provides elastic support in the vertical direction, thereby destabilizing the temperature boundary layer between the coolant and the battery in the box, improving the convective heat transfer efficiency. A periodically vibrating vibrator is more energy-efficient than a continuously vibrating vibrator.

[0010] Preferably, in order to achieve cyclic cooling, the temperature adjustment component includes a temperature sensor and a refrigeration mechanism, and the temperature sensor and the refrigeration mechanism are arranged on the inner wall of the sealed box and immersed in the coolant.

[0011] The temperature sensor monitors the coolant temperature in the sealed box in real time. If the temperature is too high, the controller starts the refrigeration mechanism to cool it down. At the same time, the circulating water flow takes away the heat generated by the battery during the charging and discharging process through heat exchange, thereby cooling the battery. At the same time, the temperature boundary layer destroyed by vibration is cooperated to improve the battery cooling efficiency.

[0012] Preferably, in order to prevent the battery temperature from being too low due to the influence of the environment, the temperature adjustment component further includes a heating mechanism, which is arranged on the inner wall of the sealed box and immersed in the coolant.

[0013] The temperature sensor monitors the temperature of the coolant in the sealed box in real time. If the temperature is too low, the heating mechanism is started through the controller to heat the coolant, thereby increasing the battery temperature, maintaining it within an appropriate operating temperature range, improving the performance and safety of the battery, and extending the service life of the battery.

[0014] As an optimal option, in order to strengthen fluid disturbance, it further includes a water flow agitator arranged in the pipeline. The water flow agitator is arranged near the water inlet of the sealed box body. The water flow agitator is signal-connected to the controller, and the water flow agitator vibrates at the same frequency as the vibration component.

[0015] A water flow agitator is arranged in the pipeline near the water inlet of the sealed box body, so that the water flow enters the sealed box body in a turbulent form, further strengthening the effect of fluid disturbance and improving the convective heat transfer efficiency.

[0016] As an optimal option, in order to prevent the pressure imbalance in the box body caused by temperature changes or coolant evaporation, it further includes a pneumatic balance valve arranged on the top of the sealed box body. The pneumatic balance valve balances the air pressure inside and outside the sealed box body to ensure the stability of the gas components inside the box.

[0017] As an optimal option, in order to control the opening and closing of the circulating water path and facilitate the maintenance and repair of the system, it further includes an opening and closing valve arranged on the pipeline between the water inlet and the water pump. The opening and closing valve is signal-connected to the controller.

[0018] As an optimal option, in order to recycle the coolant, it further includes a liquid storage tank. The liquid storage tank is arranged on the pipeline between the water pump and the water outlet, and a filter screen is provided inside the liquid storage tank.

[0019] A liquid storage tank is set and a filter screen is arranged therein to filter impurities in the coolant, prevent impurities from entering the circulating pipeline and the sealed box body, avoid damage to the battery and the water pump caused by impurities, ensure the normal operation and service life of the battery liquid cooling device, and at the same time ensure the cleanliness of the coolant, maintain good heat transfer performance, and improve the cooling effect.

[0020] As an optimal option, in order to prevent the inner core of the battery from being damaged due to excessive amplitude, it further includes a piezoelectric acceleration sensor installed on the exciter for monitoring the amplitude of the battery. The piezoelectric acceleration sensor is signal-connected to the controller.

[0021] A method for realizing a vibration-type battery liquid cooling device includes the following steps: Step 1: Start the circulating water path: The controller controls the water pump to start, and at the same time controls the opening and closing valve to open. The circulating water path is in circulation. The exciter is started through the controller to drive the sealed box body to vibrate. The temperature sensor monitors the temperature of the coolant in the sealed box body in real time; Step 2. Temperature regulation: When the temperature sensor detects that the coolant temperature in the sealed box is ≥ 50°C, the refrigeration mechanism is started through the controller to reduce the coolant temperature in the sealed box to 20 - 30°C; when the temperature sensor detects that the coolant temperature in the sealed box is ≤ 0°C, the heating mechanism is started through the controller to maintain the coolant temperature in the sealed box ≥ 5°C; when the temperature sensor detects that the coolant temperature in the sealed box remains at 5 - 50°C, the refrigeration mechanism or the heating mechanism is turned off.

[0022] Step 3. Amplitude monitoring: The exciter generates vibrations with a periodic motion of interrupting for 5 seconds every 30 seconds of operation. The vibration frequency is 1 - 50 Hz, and the amplitude range is 0.5 - 3 mm. The piezoelectric acceleration sensor monitors the battery amplitude in real time. If the amplitude range > 3 mm, the exciter is turned off through the controller. Step 4. Vibration frequency regulation: The vibration frequency is dynamically adjusted according to the battery charge and discharge current value. When the current value > 100 A, the vibration frequency is increased to 50 Hz. When the current value ≤ 50 A, the vibration frequency is reduced to below 10 Hz for energy conservation.

[0023] Beneficial effects: Based on the traditional battery circulating water cooling, the present invention installs an exciter below the sealed box to generate vibrations, which promotes the instability of the temperature boundary layer in the coolant. The convective heat transfer efficiency of the flow increases with the increase of the vibration intensity, further improving the cooling effect, making up for the deficiency of the low cooling efficiency of the traditional immersion cooling device. At the same time, a temperature adjustment component is set to adjust the coolant temperature in the sealed box, enabling the battery to be at the normal working temperature, improving the uniformity of the battery temperature, effectively avoiding local overheating, extending the service life of the battery, and enhancing the overall performance of the battery. Brief description of the drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0025] Figure 1 It is a schematic structural diagram of the present invention. Detailed implementation manners

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0028] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0029] As Figure 1 shown, a vibration-type battery liquid cooling device includes a sealed box body 1 filled with a coolant, a battery 2, a temperature adjustment component 3, a water pump 4, a vibration component 5, and a controller. A gas cavity is provided between the upper surface of the coolant and the inner top wall of the sealed box body 1. The battery 2 is detachably installed in the sealed box body 1 and immersed in the coolant. The temperature adjustment component 3 is arranged on the inner wall of the sealed box body 1. The vibration component 5 is arranged at the bottom outside the sealed box body 1. An inlet 11 and an outlet 12 lower than the inlet 11 are respectively provided on both sides of the sealed box body 1. The inlet 11 and the outlet 12 are respectively connected to the water pump 4 through pipes 6 to form a circulating water path. The controller is respectively in signal connection with the temperature adjustment component 3, the water pump 4, and the vibration component 5.

[0030] Based on the traditional circulating water cooling of the battery 2, a vibration component 5 is arranged at the bottom of the sealed box body 1. By vibrating the sealed box body 1, the coolant in the box also vibrates to generate a shearing effect, thereby causing the temperature boundary layer between the battery 2 and the coolant to become unstable, that is, destroying the temperature boundary layer, enabling sufficient convective heat transfer. The convective heat transfer efficiency increases with the increase of the vibration intensity, significantly improving the cooling efficiency of the battery 2.

[0031] In this embodiment, the coolant is a mixed liquid of fluorinated liquid HFE-7100 and propylene glycol, and the mixing volume ratio is 3:1, and the thermal conductivity ≥ 0.15 W / (m·K).

[0032] In this embodiment, the water pump 4 is a centrifugal pump, which has a high flow rate and head, and can provide sufficient power to enable the coolant to circulate rapidly in the circulation pipeline 6, ensuring that the coolant can promptly and effectively take away the heat generated by the battery core, improving the cooling efficiency. Moreover, the centrifugal pump has a simple structure, stable operation, and convenient maintenance, and is suitable for the long-term stable operation of this vibration-type battery liquid cooling device.

[0033] To achieve the disruption of the temperature boundary layer, the vibration assembly 5 includes an exciter 51, which is connected to the outer bottom of the sealed box 1, and also includes a rigid spring 52 provided at the outer bottom of the sealed box 1.

[0034] By starting the exciter 51 to vibrate the sealed box 1, the rigid spring 52 provides elastic support in the vertical direction, thereby making the temperature boundary layer between the coolant in the box and the battery 2 unstable and improving the convective heat transfer efficiency. The periodically vibrating exciter 51 is more energy-efficient than the continuously vibrating exciter 51.

[0035] To achieve cyclic cooling, the temperature regulation assembly 3 includes a temperature sensor 31 and a refrigeration mechanism 32. The temperature sensor 31 and the refrigeration mechanism 32 are provided on the inner wall of the sealed box 1 and immersed in the coolant. The temperature sensor 31 continuously monitors the temperature of the coolant in the sealed box. If the temperature is too high, the refrigeration mechanism 32 is started through the controller for cooling. At the same time, the circulating water flows through the heat exchanger to take away the heat generated by the battery 2 during charging and discharging, realizing the cooling of the battery 2. Meanwhile, in cooperation with the temperature boundary layer disrupted by vibration, the cooling efficiency of the battery 2 is improved.

[0036] In this embodiment, the refrigeration mechanism 32 is a thermoelectric cooler with a power density of 200 - 500 W / m².

[0037] To prevent the temperature of the battery 2 from being too low affected by the environment, the temperature regulation assembly 3 further includes a heating mechanism 33, which is provided on the inner wall of the sealed box 1 and immersed in the coolant. The temperature sensor 31 continuously monitors the temperature of the coolant in the sealed box. If the temperature is too low, the heating mechanism 33 is started through the controller to heat the coolant, thereby increasing the temperature of the battery 2, maintaining it within a suitable operating temperature range, improving the performance and safety of the battery 2, and extending the service life of the battery 2.

[0038] In this embodiment, the heating element is a nickel-chromium alloy heating wire with a power density of 200 - 500 W / m².

[0039] To strengthen fluid disturbance, it further includes a water flow agitator 7 arranged in the pipeline 6. The water flow agitator 7 is arranged near the water inlet 11 of the sealed box body 1. The water flow agitator 7 is signal-connected to the controller, and the hydraulic agitator vibrates at the same frequency as the vibration assembly 5. Arranging the water flow agitator 7 near the water inlet 11 of the sealed box body 1 in the pipeline 6 enables the water flow to enter the sealed box body 1 in a turbulent form, further strengthening the effect of fluid disturbance and improving the convective heat transfer efficiency.

[0040] To prevent the pressure imbalance in the box body caused by temperature changes or coolant evaporation, it further includes a pneumatic balance valve 8 arranged on the top of the sealed box body 1. The pneumatic balance valve 8 balances the air pressure inside and outside the sealed box body 1 to ensure the stability of the gas composition inside the box body. It automatically opens when the pressure change inside the box body exceeds ±10 kPa and returns to the sealed state after pressure relief.

[0041] To control the opening and closing of the circulating water circuit for the convenience of system maintenance and repair, it further includes an opening and closing valve 9 arranged on the pipeline 6 between the water inlet 11 and the water pump 4. The opening and closing valve 9 is signal-connected to the controller.

[0042] To recycle the coolant, it further includes a liquid storage tank 10. The liquid storage tank 10 is arranged on the pipeline 6 between the water pump 4 and the water outlet 12. A filter screen is provided inside the liquid storage tank 10. Arranging the liquid storage tank 10 and setting a filter screen therein are used to filter impurities in the coolant, prevent impurities from entering the circulating pipeline 6 and the sealed box body 1, avoid damage to the battery 2 and the water pump 4 caused by impurities, ensure the normal operation and service life of the battery 2 liquid cooling device, and at the same time ensure the cleanliness of the coolant, maintain good heat transfer performance, and improve the cooling effect.

[0043] In this embodiment, the filtration accuracy of the filter screen is 5 - 20 μm. A temperature adjustment component 3 can be synchronously arranged in the liquid storage tank 10 to cooperate with the temperature adjustment component 3 inside the sealed box body 1 for cooling or heating together, accelerating the convection circulation efficiency of the battery 2.

[0044] To avoid damage to the inner core of the battery 2 due to excessive amplitude, it further includes a piezoelectric acceleration sensor 101 installed on the vibrator 51 for monitoring the amplitude of the battery 2. The piezoelectric acceleration sensor 101 is signal-connected to the controller.

[0045] A method for realizing a vibration-type battery liquid cooling device includes the following steps: Step 1: Start the circulating water circuit: The controller controls the water pump 4 to start and simultaneously controls the opening and closing valve 9 to open. The circulating water circuit is in circulation. The controller starts the vibrator 51 to drive the sealed box body 1 to vibrate, and the temperature sensor 31 monitors the temperature of the coolant inside the sealed box body 1 in real time; Step 2. Temperature regulation: When the temperature sensor 31 detects that the coolant temperature in the sealed box 1 is ≥ 50°C, the refrigeration mechanism 32 is started through the controller to reduce the coolant temperature in the sealed box 1 to 20 - 30°C; when the temperature sensor 31 detects that the coolant temperature in the sealed box 1 is ≤ 0°C, the heating mechanism 33 is started through the controller to maintain the coolant temperature in the sealed box 1 ≥ 5°C; when the temperature sensor 31 detects that the coolant temperature in the sealed box 1 remains between 5 - 50°C, the refrigeration mechanism 32 or the heating mechanism 33 is turned off.

[0046] Step 3. Amplitude monitoring: The exciter 51 generates vibrations with a periodic motion of interrupting for 5 seconds every 30 seconds of operation. The vibration frequency is 1 - 50 Hz, and the amplitude range is 0.5 - 3 mm. The piezoelectric acceleration sensor 101 monitors the amplitude of the battery 2 in real time. If the amplitude range > 3 mm, the exciter 51 is turned off through the controller. Step 4. Vibration frequency regulation: The vibration frequency is dynamically adjusted according to the charge and discharge current value of the battery 2. When the current value > 100 A, the vibration frequency is increased to 50 Hz. When the current value ≤ 50 A, the vibration frequency is reduced to below 10 Hz for energy conservation.

[0047] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0048] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vibration type battery liquid cooling device, characterized in that: It includes a sealed box body (1) filled with coolant, a battery (2), a temperature regulation component (3), a water pump (4), a vibration component (5), and a controller. There is a gas cavity between the upper surface of the coolant and the inner top wall of the sealed box body (1). The battery (2) is detachably installed in the sealed box body (1) and immersed in the coolant. The temperature regulation component (3) is arranged on the inner wall of the sealed box body (1). The vibration component (5) is arranged at the bottom outside the sealed box body (1). Water inlets (11) and water outlets (12) lower than the water inlets (11) are respectively arranged on both sides of the sealed box body (1). The water inlets (11) and the water outlets (12) are respectively connected to the water pump (4) through pipes (6) to form a circulating water path. The controller is respectively in signal connection with the temperature regulation component (3), the water pump (4), and the vibration component (5).

2. The vibration-type battery liquid cooling device according to claim 1, characterized in that: The vibration component (5) includes an exciter (51). The exciter (51) is connected to the bottom outside of the sealed box body (1), and further includes a rigid spring (52) arranged at the bottom outside the sealed box body (1).

3. The vibration type battery liquid cooling device according to claim 1, characterized in that: The temperature regulation component (3) includes a temperature sensor (31) and a refrigeration mechanism (32). The temperature sensor (31) and the refrigeration mechanism (32) are arranged on the inner wall of the sealed box body (1) and immersed in the coolant.

4. The vibration type battery liquid cooling device according to claim 3, characterized in that: The temperature regulation component (3) further includes a heating mechanism (33). The heating mechanism (33) is arranged on the inner wall of the sealed box body (1) and immersed in the coolant.

5. The vibration type battery liquid cooling device according to claim 1, characterized in that: It further includes a water flow agitator (7) arranged in the pipe (6). The water flow agitator (7) is arranged near the water inlet (11) of the sealed box body (1). The water flow agitator (7) is in signal connection with the controller, and the water flow agitator vibrates at the same frequency as the vibration component (5).

6. The vibration type battery liquid cooling device according to claim 1, characterized in that: It further includes a pneumatic balance valve (8) arranged on the top of the sealed box body (1).

7. The vibration type battery liquid cooling device according to claim 1, wherein: It further includes a switching valve (9) arranged on the pipe (6) between the water inlet (11) and the water pump (4). The switching valve (9) is in signal connection with the controller.

8. The vibration type battery liquid cooling device according to claim 1, characterized in that: It further includes a liquid storage tank (10). The liquid storage tank (10) is arranged on the pipe (6) between the water pump (4) and the water outlet (12). A filter screen is arranged in the liquid storage tank (10).

9. The vibration type battery liquid cooling device according to claim 2, wherein: It further includes a piezoelectric acceleration sensor (101) installed on the exciter (51) for monitoring the amplitude of the battery (2). The piezoelectric acceleration sensor (101) is in signal connection with the controller.

10. A method for implementing the vibration type battery liquid cooling device according to any one of claims 1-9, characterized in that, It includes the following steps: Step 1: Start the circulating water path: The controller controls the water pump (4) to start, and at the same time controls the switching valve (9) to open. The circulating water path circulates. The exciter (51) is started through the controller to drive the sealed box body (1) to vibrate. The temperature sensor (31) monitors the temperature of the coolant in the sealed box body (1) in real time. Step 2. Temperature adjustment: When the temperature sensor (31) detects that the temperature of the coolant in the sealed box (1) is ≥ 50 °C, the refrigeration mechanism (32) is started through the controller to reduce the temperature of the coolant in the sealed box (1) to 20 - 30 °C; when the temperature sensor (31) detects that the temperature of the coolant in the sealed box (1) is ≤ 0 °C, the heating mechanism (33) is started through the controller to maintain the temperature of the coolant in the sealed box (1) ≥ 5 °C; when the temperature sensor (31) detects that the temperature of the coolant in the sealed box (1) remains at 5 - 50 °C, the refrigeration mechanism (32) or the heating mechanism (33) is turned off; Step 3. Vibration amplitude monitoring: The vibrator (51) generates vibrations with a periodic motion of interrupting for 5 seconds every 30 seconds of operation. The vibration frequency is 1 - 50 Hz, and the amplitude range is 0.5 - 3 mm. The piezoelectric acceleration sensor (101) monitors the amplitude of the battery (2) in real time. If the amplitude range > 3 mm, the vibrator (51) is turned off through the controller; Step 4. Vibration frequency adjustment: The vibration frequency is dynamically adjusted according to the charge and discharge current value of the battery (2). When the current value > 100 A, the vibration frequency is increased to 50 Hz. When the current value ≤ 50 A, the vibration frequency is reduced to below 10 Hz for energy conservation.

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