Battery assembly and corresponding vehicle

Abstract

The application provides a battery assembly and a vehicle comprising the same, wherein the battery assembly comprises a shell and at least one battery cell arranged in the shell, wherein an inner surface of the shell is provided with at least one acoustic wave extinguishing unit; wherein each acoustic wave extinguishing unit comprises an acoustic wave generating element and an acoustic cavity conducting member arranged around the acoustic wave generating element; each battery cell is provided with a pressure relief valve, and the acoustic wave extinguishing unit is arranged to propagate acoustic waves towards the pressure relief valve of the battery cell for extinguishing. The above battery assembly can integrate the acoustic cavity of the acoustic wave extinguishing unit with the battery structure, and realize acoustic wave extinguishing of the battery assembly by taking advantages of small acoustic wave energy diffusion in a closed environment, etc., has the advantages of environmental protection and no residue, and can guarantee safe operation of the battery assembly and the vehicle.

Description

Technical Field

[0001] This utility model relates to the field of vehicle control, specifically to a battery assembly and a corresponding vehicle. Background Technology

[0002] With the rapid development of battery technology, batteries have been widely used in electric vehicles, energy storage power stations, and other fields. However, fires caused by battery thermal runaway occur frequently, posing a serious threat to people's lives and property.

[0003] Currently, traditional fire suppression methods for battery compartments or battery modules mainly include dry powder fire suppression and gas fire suppression, but these methods have some drawbacks. For example, dry powder fire suppression leaves residues inside the battery modules, which may affect the normal operation of the batteries and corrode the circuits; gas fire suppression is more expensive, and some gases may have a certain impact on the environment.

[0004] Low-frequency acoustic fire extinguishing technology, as an emerging fire extinguishing method, has advantages such as no residue and environmental friendliness. However, traditional acoustic cavity sizes are too large, generally with a diameter greater than 30cm, making it difficult to embed them well into battery components.

[0005] Therefore, an improved battery assembly is needed. Utility Model Content

[0006] In view of this, the present invention provides at least one improved battery assembly with an acoustic fire extinguishing unit that can be embedded therein and a corresponding vehicle.

[0007] In a first aspect, this application provides a battery assembly, including a housing and at least one battery cell disposed within the housing, wherein: The inner surface of the housing is provided with at least one acoustic fire extinguishing unit; wherein each acoustic fire extinguishing unit includes an acoustic wave generating element and an acoustic cavity conducting member disposed around the acoustic wave generating element; Each battery cell is equipped with a pressure relief valve, and the acoustic fire suppression unit is arranged to transmit sound waves toward the pressure relief valve of the battery cell to extinguish the fire.

[0008] In one embodiment, the acoustic cavity conduction component of the acoustic fire extinguishing unit includes a first acoustic cavity channel and a second acoustic cavity channel in fluid communication; wherein the acoustic wave generating element is arranged in the first acoustic cavity channel, the outlet of the first acoustic cavity channel is connected to the inlet of the second acoustic cavity channel, and the outlet size of the first acoustic cavity channel and the inlet size of the second acoustic cavity channel are larger than the outlet size of the second acoustic cavity channel.

[0009] In one implementation, the outlet of the second acoustic cavity flow channel of each acoustic fire extinguishing unit is configured to propagate acoustic waves toward the pressure relief valve of a corresponding battery unit for fire extinguishing.

[0010] In one embodiment, the outlet of the second acoustic cavity flow channel of a plurality of acoustic fire extinguishing units is configured to propagate acoustic waves toward a corresponding battery cell for fire extinguishing, or the outlet of the second acoustic cavity flow channel of one of the acoustic fire extinguishing units is configured to propagate acoustic waves toward a plurality of corresponding battery cells for fire extinguishing.

[0011] In one embodiment, the inner diameter of the inlet of the second acoustic cavity flow channel is between 8 mm and 12 mm, and the inner diameter of the outlet of the second acoustic cavity flow channel is between 2 mm and 4 mm.

[0012] In one implementation, a cone is formed on the inner side of the second acoustic cavity flow channel, and the cone angle of the cone is 20-25 degrees.

[0013] In one embodiment, the battery assembly includes a thermal runaway monitoring component, which includes a monitoring sensor and a controller. The monitoring sensor is configured to monitor the performance parameters and / or environmental information of the battery assembly and generate corresponding feedback signals. The controller is configured to receive the feedback signals and adjust the operating parameters of the acoustic wave generating element accordingly based on the feedback signals.

[0014] In one embodiment, the monitoring sensors include a temperature sensor and / or a smoke sensor disposed within the housing of the battery assembly; the controller is configured to receive feedback signals from the temperature sensor and the smoke sensor and determine the risk of thermal runaway, and to activate an acoustic wave generating element when the temperature exceeds 80°C.

[0015] In one embodiment, the acoustic wave generating element of the acoustic fire extinguishing unit includes a piezoelectric ceramic layer, wherein the thickness of the piezoelectric ceramic layer is 1mm-3mm.

[0016] Secondly, this application also provides a vehicle including a battery assembly according to any embodiment herein.

[0017] The aforementioned battery assembly and corresponding vehicle utilize at least one acoustic fire extinguishing unit installed on the inner surface of the battery cell housing. This unit is oriented towards the pressure relief valve of the battery cell to extinguish fires when the battery cell temperature rises or smokes. This design overcomes the shortcomings of traditional fire extinguishing technologies by integrating the acoustic cavity conduction of the acoustic fire extinguishing unit with the battery structure and leveraging the advantages of minimal sound wave energy diffusion in a closed environment. It achieves acoustic fire extinguishing of the battery assembly, offering advantages such as environmental friendliness and zero residue, and ensuring the safe operation of the battery compartment (i.e., the battery assembly) and the vehicle. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the specific embodiments of this utility model, some prior art and specific embodiments will be briefly introduced below with reference to the accompanying drawings.

[0019] Figure 1 A schematic diagram of a typical battery assembly structure is shown; Figure 2 A schematic diagram of an acoustic fire extinguishing unit disposed within the housing of a battery assembly is shown in one embodiment of this application; Figure 3 A schematic diagram of the structure of a battery cell in one embodiment of this application is shown; Figure 4 A schematic diagram of the structure of an acoustic fire extinguishing unit in one embodiment of this application is shown. Detailed Implementation

[0020] To make the above and other features and advantages of this utility model clearer, the utility model is further described below with reference to the accompanying drawings. It should be understood that the specific embodiments given herein are for the purpose of explanation to those skilled in the art, and are exemplary only, not restrictive.

[0021] In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention does not require these specific details to be practiced. In other instances, well-known steps or operations have not been described in detail to avoid obscuring the present invention.

[0022] In the description of this disclosure, it should be understood that the terms "center", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0026] The battery module 100 (or "battery pack" or "battery compartment") is a core component of electric vehicles, and its typical structure is as follows: Figure 1 As shown, it typically consists of a battery cell 120, a battery management system (BMS), a cooling system, an electrical system, and a housing 110. The housing 110 can be an upper housing (upper cover) or a lower housing (lower cover). All parts work together to ensure the safe and stable operation of the battery.

[0027] When the battery assembly 100 experiences thermal runaway, it is prone to causing a fire. To extinguish the fire in the battery assembly 100, this application utilizes the advantages of the battery assembly 100's enclosed environment and low sound wave energy diffusion to design a battery assembly 100 with a sound wave fire extinguishing unit 130, comprising: a housing 110 and at least one battery cell 120 disposed within the housing 110, wherein: at least one sound wave fire extinguishing unit 130 is disposed on the inner surface of the housing 110; each sound wave fire extinguishing unit 130 includes a sound wave generating element 136 and a sound cavity conducting member disposed around the sound wave generating element 136; each battery cell 120 is provided with a pressure relief valve 122, and the sound wave fire extinguishing unit 130 is arranged to propagate sound waves toward the pressure relief valve 122 of the battery cell 120 for fire extinguishing.

[0028] for Figure 1 The upper and lower housings of the battery assembly 100 shown herein indicate that the acoustic fire extinguishing unit 130 may be disposed on the inner surface of either the upper or lower housing. The battery unit 120 is disposed between the upper and lower housings.

[0029] Figure 2This is a schematic diagram of an acoustic fire suppression unit 130 disposed within the housing 110 of a battery assembly in one embodiment. Figure 2 As shown, multiple acoustic fire extinguishing units 130 are disposed on the inner surface of the housing 110. Figure 4 As shown, each acoustic fire extinguishing unit 130 includes an acoustic wave generating element 136 and an acoustic cavity conducting member disposed around the acoustic wave generating element 136. The acoustic wave generating element 136 can generate sound of a certain frequency, such as low-frequency sound. The generated sound waves propagate under the guidance of the acoustic cavity conducting member. Combined with the advantages of the battery pack's enclosed environment and low sound wave energy diffusion, the conducted sound waves, especially low-frequency sound waves, are more suitable for fire extinguishing.

[0030] Figure 3 A schematic diagram of a battery cell or battery cell in one embodiment is shown, with each battery cell 120 equipped with a pressure relief valve 122. The pressure relief valve is a key component in battery safety design, its core function being to release pressure in a timely manner when the internal pressure of the battery cell abnormally increases. When thermal runaway occurs in a battery cell, the internal temperature and pressure rise sharply. To prevent the battery cell from exploding due to excessive pressure, the battery cell releases high-temperature, high-pressure gases and electrolytes through the pressure relief valve. These substances may ignite upon ejection, resulting in flames erupting from the pressure relief valve. An acoustic fire extinguishing unit 130 is arranged to propagate sound waves toward the pressure relief valve 122 of the battery cell to extinguish the fire.

[0031] In this embodiment, by placing the acoustic fire suppression unit within the battery assembly, positioned between the housing and the battery unit and facing the pressure relief valve of the battery unit, the acoustic fire suppression unit can rapidly extinguish the fire by propagating sound waves towards the pressure relief valve 122 when sparks occur or high-temperature gases ignite within the battery assembly. The pressure relief valve and the acoustic fire suppression unit can be linked; the unit activates when the valve releases pressure. Utilizing the advantages of low sound wave energy diffusion in a confined environment, the acoustic fire suppression unit extinguishes the fire while ensuring environmental friendliness and leaving no residue, thereby enhancing the safety of the battery assembly.

[0032] Figure 4 This is a schematic diagram of the structure of a sonic fire extinguishing unit 130 according to one embodiment of this application. The sonic fire extinguishing unit 130 includes a sound wave generating element 136 and a sound cavity conducting member. The sound cavity conducting member is disposed on the inner surface of the housing 110, located between the housing 110 and the battery unit 120. Figure 4In the illustrated embodiment, the acoustic cavity conduction component of the acoustic extinguishing unit 130 includes a first acoustic cavity channel 132 and a second acoustic cavity channel 134 in fluid communication; wherein the acoustic wave generating element 136 is arranged in the first acoustic cavity channel 132, the first acoustic cavity channel 132 has, for example, a cylindrical outer periphery, the outlet of the first acoustic cavity channel 132 is connected to the inlet of the second acoustic cavity channel 134, the top of the second acoustic cavity channel 134 is provided with an outlet 1342, and the second acoustic cavity channel 134 is, for example, a conical structure, the outlet size of the first acoustic cavity channel 132 and the inlet size of the second acoustic cavity channel 134 are larger than the outlet size of the second acoustic cavity channel 134, wherein the outlet size of the second acoustic cavity channel 134, the outlet size of the first acoustic cavity channel 132 and the inlet size of the second acoustic cavity channel 134 are all inner periphery sizes.

[0033] It is understood that the shape of the first acoustic cavity flow channel 132 can be adjusted according to the shape and / or number of the corresponding battery cells. Similarly, the shape of the second acoustic cavity flow channel 134 can be adjusted according to the shape of the first acoustic cavity flow channel 132. However, the second acoustic cavity flow channel 134 generally forms a tapered shape from the bottom to the top opening 1342.

[0034] In one exemplary embodiment, the outlet 1342 of the second acoustic cavity channel 134 of each acoustic fire extinguishing unit 130 is configured to propagate acoustic waves toward the pressure relief valve 122 of a corresponding battery unit 120 for fire extinguishing.

[0035] For example, when the outlet 1342 of the second acoustic cavity channel 134 of each acoustic fire extinguishing unit 130 is configured to align with the pressure relief valve 122 of a corresponding battery cell 120, the outlet 1342 of the second acoustic cavity channel 134 is directly opposite the position of the battery cell pressure relief valve 122.

[0036] In this embodiment, by aligning each acoustic fire suppression unit 130 with the pressure relief valve 122 of a corresponding battery cell, it is ensured that the fire suppression range covers all battery cells, allowing for rapid fire suppression in the event of jet sparks or ignition by high-temperature gases. The pressure relief valve is linked to the acoustic fire suppression unit; when the pressure relief valve releases pressure, the acoustic fire suppression unit is activated, thereby improving the safety of the battery assembly.

[0037] In one exemplary embodiment, the acoustic wave generating element 136 includes a piezoelectric ceramic layer, wherein the thickness of the piezoelectric ceramic layer is 1 mm to 3 mm.

[0038] For example, please also refer to Figure 2 and Figure 4The acoustic wave generating layer comprises a micro-audio array layer arranged on the inner surface of the housing 110, wherein the thickness of the housing 110 can be between 2mm and 5mm. In one embodiment, a certain number of piezoelectric ceramics constitute the acoustic wave generating element 136, and the thickness of the piezoelectric ceramic layer is 1mm-3mm. In another embodiment, the diameter of the piezoelectric ceramic layer is between 6mm and 8mm, and the number of acoustic wave generating layers can be determined according to the size of the battery cells 120 of the battery assembly. The spacing between the acoustic wave generating layer units is the width of the battery cell 120 to ensure that each battery cell 120 corresponds to one acoustic fire extinguishing unit 130. In one embodiment, the spacing between the acoustic wave generating layer units is greater than 15mm, thereby avoiding acoustic wave interference.

[0039] In one exemplary embodiment, when the inlet cross-section of the second acoustic cavity flow channel is circular, the inner diameter of the inlet of the second acoustic cavity flow channel 134 is between 8 mm and 12 mm, and the inner diameter of the outlet 1342 of the second acoustic cavity flow channel 134 is between 2 mm and 4 mm.

[0040] Please continue to refer to this. Figure 2 and Figure 4 In one embodiment, the first and second acoustic cavity channels are made of tapered PEEK (polyetheretherketone) material.

[0041] In one exemplary embodiment, a cone is formed on the inner side of the second acoustic cavity channel 134, and the cone angle of the cone is 20-25 degrees.

[0042] In one embodiment, the width of the side of the second acoustic cavity channel 134 is between 10mm and 35mm.

[0043] In one exemplary embodiment, the outlet 1342 of the second acoustic cavity flow channel 134 of the plurality of acoustic fire extinguishing units 130 is configured to propagate acoustic waves toward a corresponding battery unit 120 for fire extinguishing, or the outlet 1342 of the second acoustic cavity flow channel 134 of one acoustic fire extinguishing unit 130 is configured to propagate acoustic waves toward a corresponding plurality of battery units 120 for fire extinguishing.

[0044] In one embodiment, when the outlet 1342 of the second acoustic cavity flow channel 134 of the plurality of acoustic fire extinguishing units 130 is configured to face toward a corresponding battery unit 120, the contour center of the whole formed by the plurality of acoustic fire extinguishing units 130 is aligned with the pressure relief valve 122 of the corresponding battery unit 120.

[0045] In one embodiment, when the outlet 1342 of the second acoustic cavity channel 134 of an acoustic fire extinguishing unit 130 is configured to face toward the corresponding plurality of battery units 120, the outlet 1342 of the acoustic fire extinguishing unit 130 is aligned with the outline center of the whole formed by the plurality of battery units 120.

[0046] In one exemplary embodiment, the battery assembly 100 includes a thermal runaway monitoring component, which includes a monitoring sensor and a controller. The monitoring sensor is configured to monitor the performance parameters and / or environmental information of the battery assembly 100 and generate corresponding feedback signals. The controller is configured to receive the feedback signals and adjust the operating parameters of the acoustic wave generating element 136 accordingly based on the feedback signals. The performance parameters of the battery assembly include the current or voltage of the battery assembly, etc.

[0047] In this embodiment, the monitoring sensors of the thermal runaway monitoring component are used to monitor the environmental information of the battery module in real time, enabling the battery module to quickly extinguish fires when sparks are emitted or high-temperature gases ignite. Through the linkage between the pressure relief valve and the acoustic fire suppression unit, an alarm is triggered and the acoustic fire suppression unit is activated when the pressure relief valve releases pressure. The acoustic fire suppression unit utilizes the advantages of low sound wave energy diffusion in a confined environment to extinguish fires while ensuring environmental friendliness and leaving no residue, thereby improving the safety of the battery module.

[0048] In one exemplary embodiment, the monitoring sensors include a temperature sensor and / or a smoke sensor disposed within the housing 110 of the battery assembly 100; the controller is configured to receive feedback signals from the temperature sensor and the smoke sensor and determine the risk of thermal runaway, activating the acoustic wave generating element when the temperature exceeds 80°C. Further, when the risk of thermal runaway is determined to be low, the controller reduces the intensity and duration of the acoustic waves generated by the acoustic wave generating element 136; or, when the risk of thermal runaway is determined to be high, the controller increases the intensity and duration of the acoustic waves generated by the acoustic wave generating element 136.

[0049] In one embodiment, temperature sensors and smoke sensors are evenly distributed at various locations within the battery assembly 100 to monitor the temperature and smoke concentration inside the battery compartment in real time.

[0050] For example, when the temperature or smoke concentration exceeds a preset threshold, such as when a temperature sensor detects a temperature T ≥ 80°C and sends a feedback signal (e.g., an alarm signal), the temperature sensor transmits this signal to the controller. The controller can quickly determine the location and severity of the fire based on the signal from the temperature sensor and automatically adjust the operating parameters of the sound wave generating element, such as the frequency, intensity, and duration of the sound waves. For instance, when the fire is small, the controller can reduce the intensity and duration of the sound waves; when the fire is large, the controller can increase the intensity and duration of the sound waves to ensure effective fire suppression. Simultaneously, the controller can also communicate with the battery management system (BMS) to obtain battery status information and further optimize the fire suppression strategy.

[0051] The battery module proposed in this application includes at least one acoustic fire extinguishing unit. This unit, through its integrated acoustic cavity conduction design with the battery structure, overcomes the miniaturization bottleneck of acoustic fire extinguishing devices, resolves the conflict between fire extinguishing agent pollution and space constraints in new energy battery packs, and achieves zero residue from physical fire extinguishing, thus resulting in a safe and reliable battery module. Specifically, the battery module proposed in this application has the following advantages: 1. The acoustic fire extinguishing unit is environmentally friendly and leaves no residue during fire extinguishing: Traditional chemical fire extinguishing agents (such as dry powder and foam) leave residues that may corrode equipment or pollute the environment. The low-frequency acoustic fire extinguishing unit of this application blocks combustion through a physical mechanism, completely avoiding secondary pollution and reducing pollution to batteries and the environment.

[0052] 2. The acoustic fire suppression unit can respond quickly: Because sound waves travel at high speed, they can suppress the fire and prevent it from spreading in a short time.

[0053] 3. High safety of battery components: Low-frequency sound waves are used to both cool down and suppress flames, while avoiding the risk of short circuits in battery components that may occur with traditional water spraying.

[0054] In one embodiment, a vehicle is also provided, including a battery assembly according to any embodiment herein.

[0055] The technical features described above in different implementations or embodiments can be combined arbitrarily. Although not all possible combinations of these technical features are described, any combination of these technical features should be considered to be covered by this specification, provided that such combination does not contain contradictions.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery assembly (100), characterized in that, Includes a housing (110) and at least one battery cell (120) disposed within the housing (110), wherein: At least one acoustic fire extinguishing unit (130) is provided on the inner surface of the housing (110); wherein each acoustic fire extinguishing unit (130) includes an acoustic wave generating element (136) and an acoustic cavity conducting member disposed around the acoustic wave generating element (136); Each battery cell (120) is provided with a pressure relief valve (122), and the acoustic fire extinguishing unit (130) is arranged to transmit acoustic waves toward the pressure relief valve (122) of the battery cell (120) to extinguish the fire.

2. The battery assembly according to claim 1, characterized in that, The acoustic cavity conduction component of the acoustic fire extinguishing unit (130) includes a first acoustic cavity flow channel (132) and a second acoustic cavity flow channel (134) in fluid communication; wherein the acoustic wave generating element (136) is arranged in the first acoustic cavity flow channel (132), the outlet of the first acoustic cavity flow channel (132) is connected to the inlet of the second acoustic cavity flow channel (134), and the outlet size of the first acoustic cavity flow channel (132) and the inlet size of the second acoustic cavity flow channel (134) are larger than the outlet size (1342) of the second acoustic cavity flow channel (134).

3. The battery assembly according to claim 2, characterized in that, The outlet (1342) of the second acoustic cavity flow channel (134) of each acoustic fire extinguishing unit (130) is configured to propagate acoustic waves to a pressure relief valve (122) of a corresponding battery unit (120) for fire extinguishing.

4. The battery assembly according to claim 2, characterized in that, The outlet (1342) of the second acoustic cavity flow channel (134) of the plurality of acoustic fire extinguishing units (130) is configured to propagate sound waves toward a corresponding battery unit (120) for fire extinguishing, or the outlet (1342) of the second acoustic cavity flow channel (134) of one of the acoustic fire extinguishing units (130) is configured to propagate sound waves toward the corresponding plurality of battery units (120) for fire extinguishing.

5. The battery assembly according to claim 3 or 4, characterized in that, The inner diameter of the inlet of the second acoustic cavity flow channel (134) is between 8mm and 12mm, and the inner diameter of the outlet (1342) of the second acoustic cavity flow channel (134) is between 2mm and 4mm.

6. The battery assembly according to claim 3 or 4, characterized in that, The inner surface of the second acoustic cavity channel (134) forms a cone, and the cone angle of the cone is 20-25 degrees.

7. The battery assembly according to claim 1, characterized in that, The battery assembly (100) includes a thermal runaway monitoring component, which includes a monitoring sensor and a controller. The monitoring sensor is configured to monitor the performance parameters and / or environmental information of the battery assembly (100) and generate corresponding feedback signals. The controller is configured to receive the feedback signals and adjust the operating parameters of the acoustic wave generating element (136) accordingly based on the feedback signals.

8. The battery assembly according to claim 7, characterized in that, The monitoring sensors include a temperature sensor and / or a smoke sensor disposed within the housing of the battery assembly (100); The controller is configured to receive feedback signals from the temperature sensor and the smoke sensor and determine the risk of thermal runaway. When the temperature is greater than 80°C, the acoustic wave generating element is activated.

9. The battery assembly according to claim 1 or 7, characterized in that, The acoustic wave generating element (136) includes a piezoelectric ceramic layer, wherein the thickness of the piezoelectric ceramic layer is 1 mm to 3 mm.

10. A vehicle, characterized in that, The vehicle includes: a battery assembly (100) according to any one of claims 1-9.

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