Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, and relates to the technical field of batteries, the battery device comprises a box body, a cover plate and a battery monomer, a mounting cavity is formed in the box body, and the mounting cavity is provided with a cavity opening; the cover plate is arranged on the box body to cover the opening of the cavity, a plurality of cavities are formed in the cover plate, and at least part of the cavities are arranged at intervals in the thickness direction of the cover plate; and the battery monomers are mounted in the mounting cavities. According to the technical scheme, due to the fact that the multiple cavities exist in the thickness direction of the cover plate, when noise is transmitted in the thickness direction, energy of the noise can be gradually consumed by the multiple cavities, and the level of the noise entering a cab from the bottom of the vehicle is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and an electrical equipment. Background Art

[0002] In existing new energy vehicles, the power battery pack is usually installed at the bottom of the vehicle. The vehicle usually encounters various complex road conditions during driving. The noise generated at the bottom of the vehicle can easily be transmitted to the cockpit through the power battery pack. Excessive noise affects the driving experience of the passengers in the cockpit. Utility Model Content

[0003] The main purpose of this application is to propose a battery device and an electrical device, which aims to improve the problem that noise is easily transmitted to the vehicle cockpit through the power battery pack, thereby affecting the driving experience of the driver and passengers.

[0004] In a first aspect, the battery device proposed in the present application comprises:

[0005] The box body is formed with a mounting cavity, wherein the mounting cavity has a cavity opening;

[0006] a cover plate, arranged on the box body to cover the cavity opening, wherein a plurality of cavities are formed inside the cover plate, wherein at least some of the cavities are arranged in the thickness direction of the cover plate; and

[0007] A battery cell is installed in the installation cavity.

[0008] The technical solution provided by the present application is that a plurality of cavities are formed in the cover plate of the battery device. When a vehicle equipped with the battery device is driving, external noise enters the cockpit and part of it needs to pass through the cover plate of the battery device. In the process of passing through the cover plate, the noise inevitably needs to pass through the cavity. Noise usually reflects, scatters and refracts at the wall of the cavity regardless of whether it enters or leaves the cavity. Usually, only part of the refracted noise can be effectively transmitted along the thickness direction of the cover plate, which reduces the intensity of the noise. Moreover, at least part of the cavities are arranged in the thickness direction of the cover plate, which further weakens the intensity of the noise after passing through multiple cavities. Finally, the intensity of the noise transmitted to the cockpit can be reduced to a comfortable level, thereby improving the driving experience of the driver and passengers.

[0009] In some embodiments, the cover plate comprises:

[0010] A main body portion, at least covering the cavity opening; and

[0011] A plurality of noise reduction parts are embedded in the main body, and at least one cavity is formed in the noise reduction part.

[0012] Among them, by embedding multiple noise reduction parts with cavities in the main body to achieve the distribution of multiple cavities in the cover plate, the difficulty of forming the cavities in the cover plate is greatly reduced. At the same time, the number and arrangement density of the noise reduction parts are relatively controllable, and the distribution of noise reduction performance in various local areas of the cover plate can be controlled.

[0013] In some embodiments, the noise reducer comprises a hollow sphere.

[0014] Among them, compared with noise reduction parts of other shapes, the hollow sphere has a more regular structure, a more rounded shape, and no directionality, which is conducive to the embedded setting of multiple noise reduction parts in the main body, and also makes it easier to evenly arrange the multiple noise reduction parts.

[0015] In some embodiments, two adjacent noise reduction portions are arranged in abutment with each other.

[0016] Among them, two adjacent noise reduction parts are arranged in abutment, and multiple noise reduction parts can be arranged close to each other, thereby improving the setting density and setting uniformity of the noise reduction parts in the main body, thereby improving the noise reduction performance of the cover plate and making its noise reduction performance evenly distributed.

[0017] In some embodiments, the noise reduction portion includes a soft noise reduction portion.

[0018] Among them, the noise reduction part is made of soft material, and combined with the cavity it has, the soft noise reduction part can be given good elastic performance and anti-yield characteristics. When the cover is under pressure, the noise reduction part in the corresponding area can absorb the pressure through its own elastic deformation and anti-yield characteristics, reducing the extent of the cover being recessed into the installation cavity. When the cover is pulled, the noise reduction part in the corresponding area can also absorb the pulling force through its own elastic deformation and anti-yield characteristics, reducing the extent of the cover protruding outward, thereby having the effect of shock absorption and noise reduction.

[0019] In some embodiments, the body portion includes an epoxy resin base or an acrylic resin base.

[0020] Among them, the main body is made of an epoxy resin base or an acrylic resin base. In the molten state, it is relatively easy to embed the noise reduction part into the main body or fill the main body between multiple noise reduction parts, which can ensure that each noise reduction part is fully covered, and the difficulty of setting the noise reduction part in the main body is reduced from the processing technology. In addition, the main body can be solidified after the noise reduction part is bonded, and has good mechanical properties.

[0021] In some embodiments, the plurality of noise reduction parts include a plurality of first noise reduction parts and a plurality of second noise reduction parts, the outer diameter of the first noise reduction part is greater than the outer diameter of the second noise reduction part, and the plurality of second noise reduction parts are distributed at least at the side ends of the main body along the thickness direction.

[0022] Among them, a first noise reduction part with a larger outer diameter is selected to fill the middle part of the main body, so that there are more solid parts of the main body between two adjacent first noise reduction parts, which can ensure that the connection strength of the main body to the multiple first noise reduction parts is sufficient, and a second noise reduction part with a smaller outer diameter is selected to fill the side end of the main body along the thickness direction of the cover plate, which can make full use of the space between the boundary of the first noise reduction part and the main body, thereby improving the arrangement density of the noise reduction part in the main body and enhancing the noise reduction performance of the cover plate.

[0023] In some embodiments, in the thickness direction, the cover plate includes a noise reduction layer and a main body layer connected to each other, the main body layer is connected to the box body, and the noise reduction layer includes the main body portion and a plurality of the noise reduction portions.

[0024] Among them, the cover plate is arranged to be composed of a noise reduction layer and a main body layer. The connection between the cover plate and the box body can be achieved through the main body layer, and the noise reduction layer can give the cover plate noise reduction performance. The noise reduction layer and the main body layer have no influence on each other, and the selection of materials can be considered independently. The main body layer can be made of a material with better connection effect, and the main body can be made of a material with better covering performance and easier processing.

[0025] In some embodiments, the bulk layer includes two bulk layer sections;

[0026] The noise reduction layer is sandwiched between two of the main body layers.

[0027] The noise reduction layer is sandwiched between the two main body layers, and the main body layers with good rigidity can provide good protection for the noise reduction layer, thereby preventing the noise reduction part from being damaged by external forces.

[0028] In some embodiments, a receiving cavity is formed between the two main body layers;

[0029] The noise reduction layer is accommodated in the accommodating cavity.

[0030] Among them, the noise reduction layer is accommodated in the accommodating cavity formed between the two main body layers, which can provide all-round protection for the noise reduction layer through the two main body layers. At the same time, due to the enclosed setting, there is a more sufficient connection between the two main body layers, which ensures the overall strength of the cover.

[0031] In some embodiments, the two main bodies are layered to form a connection overlap around the periphery of the accommodating cavity, and the connection overlap is connected to the box body.

[0032] Among them, by connecting to the box body through the connecting lap formed on the periphery of the accommodating cavity, more connection points can be provided to ensure the stability of the connection between the cover plate and the box body, and the stress points of the two main body layers and the box body are at the connecting lap, so as not to squeeze the noise reduction layer in the accommodating cavity.

[0033] In a second aspect, the present application further proposes an electrical device, which includes the above-mentioned battery device, and the battery device is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0035] Figure 1 A simplified structural diagram of an embodiment in which the electric device provided in this application is a vehicle;

[0036] Figure 2 A schematic diagram of an exploded structure of a battery device according to an embodiment of the present application;

[0037] Figure 3 A schematic structural diagram of an embodiment of a cover plate in a battery device provided in the present application;

[0038] Figure 4 for Figure 3 Structural diagram of the middle section AA;

[0039] Figure 5 for Figure 4 A schematic diagram of the enlarged structure of the local B in the middle;

[0040] Figure 6 for Figure 5 Schematic diagram of the local structure of the middle noise reduction layer;

[0041] Figure 7 A schematic diagram of the noise reduction principle of the hollow sphere in one embodiment of the battery device provided in the present application.

[0042] Description of Figure Numbers:

[0043] 1000. Vehicles;

[0044] 100, battery device; 200, controller; 300, motor;

[0045] 1. Cover plate; 11. Main body layer; 111. Main body layer; 1111. Connection overlap; 12. Noise reduction layer; 121. Main body; 122. Noise reduction part; 122a. First noise reduction part; 122b. Second noise reduction part; 1221. Hollow sphere; 2. Box body; 2a. Installation cavity; 3. Battery cell; X. Thickness direction.

[0046] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0049] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0050] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0051] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0052] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0053] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0054] In existing new energy vehicles, the power battery pack is usually installed at the bottom of the vehicle, and the battery pack cover is usually facing the vehicle's cockpit. The vehicle usually encounters various complex road conditions during driving. The rolling contact between the wheels and the ground will generate noise. The battery pack itself will also generate noise under the vehicle's acceleration, deceleration, bumps and other operating conditions. Various noises are usually transmitted to the cockpit through the battery pack cover. Excessive noise affects the driving experience of the drivers and passengers in the cockpit.

[0055] Analysis of the causes of the above problems shows that the existing battery pack cover generally adopts a solid structure. Considering that sound usually reflects, refracts and scatters when entering different media, the noise will lose some energy when entering the battery pack cover, and will also lose some energy when leaving the battery pack cover and entering the cockpit. However, only two energy losses are not enough to reduce the intensity of the noise to a comfortable level. Therefore, it is possible to consider improving the battery pack cover in the direction of increasing the number of energy losses during noise transmission to improve its noise reduction performance.

[0056] In some schemes, a honeycomb-arranged cavity is provided inside the battery pack cover. However, the honeycomb-arranged cavity can usually only be provided in a single layer. Although the single-layer cavity increases the number of noise energy losses to a certain extent, its final noise reduction effect is still not good. It is possible to consider improving the noise reduction effect of the battery pack cover by increasing the number of cavity layers.

[0057] The battery device disclosed in the embodiment of the present application can be used to provide electric energy for electric devices, wherein the electric devices can be but not limited to battery vehicles, electric vehicles, ships, spacecraft, etc. Among them, the spacecraft can include airplanes, rockets, space shuttles, spacecraft, etc.

[0058] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device in an embodiment of the present application.

[0059] Please refer to Figure 1 , Figure 1 The electrical equipment provided for this application is a simplified structural diagram of an embodiment of a vehicle. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000, for example, the battery device 100 can be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for the starting, navigation and driving of the vehicle 1000. Working power requirements.

[0060] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0061] After the battery device 100 provided in the present application is applied to electrical equipment, it can at least improve the problem that noise is easily transmitted to the vehicle cockpit through the power battery pack, thereby affecting the driving experience of the driver and passengers.

[0062] To facilitate understanding of the battery device 100 provided in the present application, the following is a description with reference to the accompanying drawings, wherein: Figure 1 A simplified structural diagram of an embodiment in which the electric device provided in this application is a vehicle; Figure 2 A schematic diagram of an exploded structure of a battery device according to an embodiment of the present application; Figure 3 A schematic structural diagram of an embodiment of a cover plate in a battery device provided in the present application; Figure 4 for Figure 3 Structural diagram of the middle section AA; Figure 5 for Figure 4 A schematic diagram of the enlarged structure of the local B in the middle; Figure 6 for Figure 5 Schematic diagram of the local structure of the middle noise reduction layer; Figure 7 A schematic diagram of the noise reduction principle of the hollow sphere in one embodiment of the battery device provided in the present application.

[0063] See also Figures 2 to 5 In one embodiment of the present application, the battery device 100 includes a box body 2, a cover plate 1 and a battery cell 3. The box body 2 is formed with a mounting cavity 2a, and the mounting cavity 2a has a cavity opening; the cover plate 1 is arranged on the box body 2 to cover the cavity opening, and a plurality of cavities are formed inside the cover plate 1, wherein at least some of the cavities are arranged at intervals in the thickness direction X of the cover plate 1; the battery cell 3 is installed in the mounting cavity 2a.

[0064] It should be noted that the box body 2 is the main loading component of the battery device 100. The battery device 100 is installed on the electrical equipment through the box body 2, and the battery cell 3 is installed through the installation cavity 2a of the box body 2. The box body 2 is formed with a installation cavity 2a. The box body 2 can be arranged in an integral manner to directly form the installation cavity 2a, or it can be arranged in a split and spliced ​​manner. For example, the box body 2 includes a bottom plate and a surrounding frame, and the surrounding frame is arranged on the bottom plate to define the installation cavity 2a. The battery cell 3 can be completely hidden in the installation cavity 2a. In this case, the side wall of the installation cavity 2a is at least higher than the battery cell 3. The battery cell 3 can also be partially hidden in the installation cavity 2a. In this case, the side wall of the installation cavity 2a is lower than the battery cell 3. Regardless of whether the side wall of the installation cavity 2a is high or low, the box body 2 can provide protection for the battery cell 3 at least from the surrounding side and the bottom side.

[0065] In the battery device 100, a plurality of battery cells 3 are usually included, and the plurality of battery cells 3 can be connected in series, in parallel or in mixed connection. Mixed connection means that the plurality of battery cells 3 are both connected in series and in parallel. The plurality of battery cells 3 can be directly connected in series, in parallel or in mixed connection, and then the battery cell 3 composed of the plurality of battery cells 3 is accommodated in the mounting cavity 2a of the box body 2 as a whole; of course, the battery cell 3 can also be a plurality of battery cells 3 connected in series, in parallel or in mixed connection to form a battery module, and then the plurality of battery modules are connected in series, in parallel or in mixed connection to form the battery cell 3, and accommodated in the mounting cavity 2a of the box body 2. The battery device 100 can also include other structures. For example, the battery device 100 can also include a confluence component for realizing electrical connection between the plurality of battery cells 3 or the plurality of battery modules. Among them, each battery cell 3 can be a secondary battery or a primary battery, and can also be a lithium sulfur battery, a sodium ion battery or a magnesium ion battery, but is not limited thereto. The battery cell 3 can be cylindrical, flat, rectangular or in other shapes.

[0066] The function of the cover plate 1 is to be arranged on the box body 2, so as to block the cavity opening of the installation cavity 2a. In the use scenario of the vehicle, the position of the cover plate 1 of the battery device 100 is usually corresponding to the position of the cockpit. The connection method between the cover plate 1 and the box body 2 is usually a detachable connection, which is not limited in this embodiment; a plurality of cavities are formed inside the cover plate 1, and the specific shape of the cavity has various situations. For example, the cavity can be a regular cavity or an irregular cavity. The cavity can usually be filled with air, can be filled with other gases, or can be filled with a gas. The vacuum chamber is considered to be a vacuum chamber, which is not limited in this embodiment; generally speaking, at least part of the multiple cavities are arranged in the extended plane of the cover plate 1, so as to give each local area of ​​the cover plate 1 a noise reduction performance along the thickness direction X of the cover plate 1; "at least part of the cavities are arranged in the thickness direction X of the cover plate 1" means that the number of this type of cavities is at least two, and can be three or even more. It can be understood that when the noise passes through this area of ​​the cover plate 1 along the thickness direction X (the area where multiple cavities are arranged in the thickness direction X), it can be weakened more times.

[0067] In the technical solution provided by the present application, a plurality of cavities are formed in the cover plate 1 of the battery device 100. When a vehicle having the battery device 100 is driving, external noise enters the cockpit and part of it needs to pass through the cover plate 1 of the battery device 100. In the process of passing through the cover plate 1, the noise inevitably needs to pass through the cavity. Whether entering or leaving the cavity, the noise usually reflects, scatters and refracts at the wall of the cavity. Usually, only part of the refracted noise can be effectively transmitted along the thickness direction X of the cover plate 1, which reduces the intensity of the noise. Moreover, at least part of the cavities are arranged in the thickness direction X of the cover plate 1, which further weakens the intensity of the noise after passing through multiple cavities. Finally, the intensity of the noise transmitted to the cockpit can be reduced to a comfortable level, thereby improving the driving experience of the driver and passengers.

[0068] To understand the principle of noise reduction by cavity, please refer to Figure 7 , Figure 7 The figure shows the process of noise entering the cavity. In this process, the noise is generated, scattered and refracted in different directions at the interface between the physical structure of the cover plate 1 and the cavity (that is, the wall of the cavity). The reflected noise is basically eliminated, and the scattered noise is emitted in other directions because it cannot pass through the cavity. Only the refracted noise can continue to pass out effectively along the thickness direction X of the cover plate 1. Therefore, the intensity of the noise that finally passes through the cover plate 1 is reduced.

[0069] There are many ways to form a cavity in the solid cover plate 1, for example, by blowing bubbles into the molten material, and then forming a cavity after the material solidifies. However, forming multiple dense cavities in this way may be difficult to implement. In view of this, please refer to Figure 3 and Figure 4 In some embodiments, the cover plate 1 includes a main body portion 121 and a plurality of noise reduction portions 122 , the main body portion 121 at least covers the cavity opening, the plurality of noise reduction portions 122 are embedded in the main body portion 121 , and at least one cavity is formed in the noise reduction portion 122 .

[0070] It should be noted that the cover 1 includes a main body 121 and a plurality of noise reduction parts 122. It can be understood that the cover 1 is completely composed of the main body 121 and the noise reduction parts 122. At this time, the main body 121 is connected to the box body 2, and needs to have sufficient rigidity. Its material can be a metal alloy; it can also be understood that the cover 1 can also include other structures besides the main body 121 and the noise reduction parts 122. At this time, the main body 121 can be indirectly connected to the box body 2 through other structures. The main body 121 does not need to embody rigidity, but only needs to accommodate a plurality of noise reduction parts 122. Its material can be plastic or other materials, which is not limited in this embodiment.

[0071] A plurality of noise reduction parts 122 are embedded in the main body 121. The main body 121 may be provided with a receiving hole, and the noise reduction part 122 is adapted to be arranged in the receiving hole. At the same time, the receiving hole may extend through along the thickness direction X of the cover plate 1, so as to accommodate a plurality of noise reduction parts 122, so that at least part of the cavity is arranged in the thickness direction X of the cover plate 1; or the main body 121 may cover the noise reduction part 122 therein by melting and solidifying; it can generally be understood that the plurality of noise reduction parts 122 are evenly arranged in the main body 121 to give each local area of ​​the main body 121 a balanced noise reduction performance. Of course, it is not limited to this. The plurality of noise reduction parts 122 may also be densely arranged in local areas of the main body 121, and loosely arranged in other local areas, so as to adaptively adjust the distribution of its noise reduction performance according to the arrangement of other physical structures in the vehicle for the purpose of sound insulation. “At least one cavity is formed in the noise reduction part 122” means that only a single larger cavity or a plurality of smaller cavities may be formed in the noise reduction part 122; since the function of the noise reduction part 122 is mainly to reduce the noise intensity, the material of the noise reduction part 122 may be a metal alloy material with good rigidity, or a plastic material with good plasticity; and in terms of appearance, the noise reduction part 122 may be a square structure, a cylindrical structure, or an irregular structure, which is not limited in this embodiment.

[0072] According to the above technical solution, multiple noise reduction parts 122 with cavities are embedded in the main body part 121 to achieve the distribution of multiple cavities in the cover plate 1, which greatly reduces the difficulty of forming cavities in the cover plate 1. At the same time, the number and arrangement density of the noise reduction parts 122 are relatively controllable, and the distribution of noise reduction performance in various local areas of the cover plate 1 can be controlled.

[0073] See also Figure 6 and Figure 7 In some embodiments, the noise reduction portion 122 includes a hollow sphere 1221 .

[0074] It should be noted that “the noise reduction portion 122 includes a hollow sphere 1221 ” means that the noise reduction portion 122 has a spherical shape and a hollow interior to form a cavity. The cavity in this embodiment generally refers to a spherical cavity.

[0075] According to the above technical solution, compared with noise reduction parts 122 of other shapes, the hollow sphere 1221 has a more regular structure, a more rounded shape, and has no directionality, which is conducive to the embedded setting of multiple noise reduction parts 122 in the main body 121, and also makes it easier to evenly arrange the multiple noise reduction parts 122.

[0076] In the above embodiment, a plurality of noise reduction portions 122 may be spaced apart from each other. In this case, there is a solid portion of the main body 121 between two adjacent noise reduction portions 122, so that the arrangement density of the noise reduction portions 122 in the main body 121 is low, and the installation base of the main body 121 is not fully utilized, thereby limiting the noise reduction performance of the cover plate 1. In view of this, in some embodiments, two adjacent noise reduction portions 122 are arranged in contact with each other.

[0077] It should be noted that “two adjacent noise reduction parts 122 are arranged in contact with each other” means that two adjacent noise reduction parts 122 are in direct contact with each other.

[0078] According to the above technical solution, two adjacent noise reduction parts 122 are arranged in abutment with each other, and multiple noise reduction parts 122 can be arranged closer to each other, thereby improving the setting density and setting uniformity of the noise reduction parts 122 in the main body part 121, thereby improving the noise reduction performance of the cover plate 1 and making its noise reduction performance evenly distributed.

[0079] The cover plate 1 of the battery device 100 is usually connected to the box body 2 at the peripheral position, and there is a large extension area in the middle. During the driving of the vehicle, if the cover plate 1 is subjected to force, the cover plate 1 is likely to vibrate along its thickness direction X, thereby generating noise. In view of this, in some embodiments, the noise reduction portion 122 includes a soft noise reduction portion 122.

[0080] It should be noted that the "soft noise reduction part 122" means that the noise reduction part 122 is made of a soft material to give the soft noise reduction part 122 good elastic properties. For example, this soft material can be a rubber material, a polyurethane material, etc., and this embodiment does not limit its specific material.

[0081] According to the above technical scheme, the noise reduction part 122 is made of soft material, and combined with the cavity it has, the soft noise reduction part 122 can be given good elastic performance and anti-yield characteristics. When the cover plate 1 is under pressure, the noise reduction part 122 in the corresponding area can absorb the pressure through its own elastic deformation and anti-yield characteristics, thereby reducing the degree of depression of the cover plate 1 into the installation cavity 2a. When the cover plate 1 is pulled, the noise reduction part 122 in the corresponding area can also absorb the pulling force through its own elastic deformation and anti-yield characteristics, thereby reducing the degree of outward protrusion of the cover plate 1, thereby having the effect of shock absorption and noise reduction, and can also play a role in protecting the battery cell 3.

[0082] In some embodiments, the body portion 121 includes an epoxy resin base or an acrylic resin base.

[0083] It should be noted that the epoxy resin base refers to the material of the main body 121 being epoxy resin. After curing, the epoxy resin has a low hardening shrinkage rate, good dimensional stability, and also good chemical stability. Similarly, the acrylic resin base refers to the material of the main body 121 being acrylic resin. Like epoxy resin, acrylic resin also has good chemical stability and strong mechanical properties after curing.

[0084] According to the above technical solution, the main body 121 is made of an epoxy resin base or an acrylic resin base. In a molten state, it is relatively easy to embed the noise reduction part 122 into the main body 121 or to fill the main body 121 between multiple noise reduction parts 122, thereby ensuring sufficient covering of each noise reduction part 122. The difficulty of setting the noise reduction part 122 in the main body 121 is reduced from the processing technology, and the main body 121 can be cured after the noise reduction part 122 is bonded, and has good mechanical properties.

[0085] It can be understood that the arrangement density of the noise reduction part 122 in the main body 121 is closely related to the noise reduction performance of the cover 1. Generally speaking, the greater the arrangement density of the noise reduction part 122, the stronger the noise reduction performance of the cover 1. However, during the processing of the main body 121, it is usually necessary to control the thickness of the main body 121 according to the thickness of the cover 1. After multiple noise reduction parts 122 are filled into the main body 121, a certain amount of space is usually reserved at the side end of the main body 121 along the thickness direction X. This space cannot accommodate a complete noise reduction part 122, which may cause a waste of accommodation space in the main body 121, making it difficult to further increase the arrangement density of the noise reduction part 122.

[0086] For this reason, please see Figure 5 In some embodiments, the multiple noise reduction parts 122 include multiple first noise reduction parts 122a and multiple second noise reduction parts 122b. The outer diameter of the first noise reduction part 122a is greater than the outer diameter of the second noise reduction part 122b. The multiple second noise reduction parts 122b are at least distributed on the side ends of the main body 121 along the thickness direction X.

[0087] It should be noted that the first noise reduction portion 122a with a larger outer diameter is usually filled into the main part of the main body 121. Along the thickness direction X of the cover plate 1, there is still a certain space between the boundary of the first noise reduction portion 122a located at the outermost layer and the main body 121 (that is, the side end of the main body 121), and the second noise reduction portion 122b with a smaller outer diameter is filled in this space.

[0088] It should be noted that the reason why the second noise reduction part 122b with a smaller outer diameter is not fully selected to fill the main body part 121 is that the smaller the outer diameter of the noise reduction part 122, the less solid part of the main body part 121 exists between two adjacent noise reduction parts 122, which can easily lead to weakened mechanical properties of the main body part 121, for example, reduced connection strength of multiple noise reduction parts 122.

[0089] According to the above technical solution, a first noise reduction portion 122a with a larger outer diameter is selected to fill the middle part of the main body 121, so that there are more solid parts of the main body 121 between two adjacent first noise reduction portions 122a, which can ensure that the connection strength of the main body 121 for multiple first noise reduction portions 122a is sufficient, and a second noise reduction portion 122b with a smaller outer diameter is selected to fill the side end of the main body 121 along the thickness direction X of the cover plate 1, which can make full use of the space between the boundary of the first noise reduction portion 122a and the main body 121, thereby improving the arrangement density of the noise reduction portion 122 in the main body 121 and enhancing the noise reduction performance of the cover plate 1.

[0090] The above embodiment only limits the cover plate 1 to include a main body portion 121 and a plurality of noise reduction portions 122. There are many possibilities for the specific structure of the cover plate 1. For example, see Figure 5 In some embodiments, in the thickness direction X, the cover plate 1 includes a noise reduction layer 12 and a main body layer 11 that are connected to each other, the main body layer 11 is connected to the box body 2, and the noise reduction layer 12 includes a main body portion 121 and a plurality of noise reduction portions 122.

[0091] It should be noted that the noise reduction layer 12 and the main layer 11 are both layer structures extending within the extension plane of the cover plate 1, wherein "the main layer 11 is connected to the box body 2" means that the main layer 11 has sufficient rigidity, and its material is usually a metal alloy, such as an aluminum alloy; there are many possible ways to connect the noise reduction layer 12 and the main layer 11, for example, the noise reduction layer 12 is adhered to the main layer 11, or the noise reduction layer 12 is threadedly connected to the main layer 11, or the noise reduction layer 12 is snap-connected to the main layer 11, and this embodiment does not limit this; since the noise reduction layer 12 and the main layer 11 are arranged in the thickness direction X of the cover plate 1, the noise reduction layer 12 may be on the side of the main layer 11 close to the installation cavity 2a, or it may be on the side of the main layer 11 away from the installation cavity 2a.

[0092] “The noise reduction layer 12 includes a main body portion 121 and multiple noise reduction portions 122” means that the main body portion 121 and the multiple noise reduction portions 122 of the cover plate 1 are both in the noise reduction layer 12. The noise reduction layer 12 may only include the main body portion 121 and the noise reduction portions 122, or may also include other structures, for example, a skin structure for covering the main body portion 121, which is not limited in this embodiment.

[0093] According to the above technical scheme, the cover plate 1 is configured to be composed of a noise reduction layer 12 and a main body layer 11. The main body layer 11 can be used to connect the cover plate 1 and the box body 2. The noise reduction layer 12 can give the cover plate 1 noise reduction performance. The noise reduction layer 12 and the main body layer 11 do not affect each other in their manufacturing. The selection of materials can be considered independently. A material with better connection effect can be selected to make the main body layer 11, and a material with better coating performance and easier processing can be selected to make the main body 121.

[0094] The above embodiment mentioned that the noise reduction layer 12 may be located on the side of the main body layer 11 close to the installation cavity 2a, or on the side of the main body layer 11 away from the installation cavity 2a. However, in both cases, the noise reduction layer 12 may be damaged by external forces. Figure 5 In some embodiments, the main body layer 11 includes two main body layers 111 ; the noise reduction layer 12 is sandwiched between the two main body layers 111 .

[0095] It should be noted that the noise reduction layer 12 is sandwiched between the two main body layers 111. Generally speaking, no additional connecting structure is required between the noise reduction layer 12 and the main body layers 111, but it is also possible to further connect and fix them through an adhesion structure; the two main body layers 111 can be one of them connected to the box body 2. At this time, the other main body layer 111 mainly plays the role of clamping the noise reduction layer 12. The two main body layers 111 can be connected by electric welding, or the two main body layers 111 can be connected through the noise reduction layer 12 and the adhesion structure. Of course, the two main body layers 111 can also be connected to the box body 2 at the same time. At this time, there is usually no need to consider the connection between the two main body layers 111.

[0096] According to the above technical solution, the noise reduction layer 12 is sandwiched between the two main layers 111 , and the main layers 111 with good rigidity can provide good protection for the noise reduction layer 12 to prevent the noise reduction part 122 from being damaged by external forces.

[0097] In some embodiments, a receiving cavity is formed between the two main body layers 111; and the noise reduction layer 12 is received in the receiving cavity.

[0098] It should be noted that, since the accommodating cavity is formed by two main body layers 111, it can be understood that the accommodating cavity is flat, and the noise reduction layer 12 is accommodated in the accommodating cavity, and at least part of it can be connected to the inner wall of the accommodating cavity. Normally, the noise reduction layer 12 is filled in the accommodating cavity to provide support for the two main body layers 111.

[0099] According to the above technical solution, the noise reduction layer 12 is accommodated in the accommodating cavity formed between the two main body layers 111, and the two main body layers 111 can provide all-round protection for the noise reduction layer 12. At the same time, due to the enclosed setting, there is a more sufficient connection between the two main body layers 111, thereby ensuring the overall strength of the cover plate 1.

[0100] Please continue reading Figure 5 In some embodiments, the two main body layers 111 are formed with a connecting edge 1111 at the periphery of the accommodating cavity, and the connecting edge 1111 is connected to the box body 2.

[0101] It should be noted that "the two main body layers 111 are formed with connecting overlaps 1111 at the periphery of the accommodating cavity" means that a connecting overlap 1111 is formed on each main body layer 111, and the two connecting overlaps 1111 are overlapped in the direction of the cover plate 1. The two connecting overlaps 1111 can be overlapped with each other or fixed as a whole. At the same time, the connecting overlaps 1111 are arranged around the accommodating cavity; the connecting overlaps 1111 are connected to the box body 2. For example, through holes that pass through to the box body 2 can be formed on the two connecting overlaps 1111, and threaded holes connected to the box body 2 are arranged in the through holes with connecting bolts.

[0102] According to the above technical solution, by connecting to the box body 2 through the connecting lap 1111 formed on the periphery of the accommodating cavity, more connection points can be provided to ensure the stable connection between the cover plate 1 and the box body 2, and the force points of the two main body layers 111 and the box body 2 are at the connecting lap 1111, so as not to squeeze the noise reduction layer 12 in the accommodating cavity.

[0103] It should be further explained that the box body 2 is usually composed of a base plate and a frame. The frame is arranged on the base plate to define an installation cavity 2a. The cover plate 1 is usually located on the other side of the frame away from the base plate, and is connected and fixed to the frame through a connecting overlap 1111.

[0104] In some embodiments, a mounting structure is further provided on the box body 2, and the mounting structure is used to mount the battery device 100 on an electrical device.

[0105] In other embodiments, the battery device 100 further includes a battery management system for managing the battery cells 3 , and a liquid cooling plate for cooling the battery cells 3 .

[0106] The present application also proposes an electric device, which includes a battery device 100, and the battery device 100 is used to provide electric energy. The specific structure of the battery device 100 refers to the above embodiment. Since the electric device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the battery device 100 is used to provide electric energy to the electric device, and the electric device includes but is not limited to new energy vehicles such as pure electric vehicles, hybrid vehicles and extended-range vehicles, and can also include aircraft such as electric drones and electric passenger aircraft.

[0107] The present application proposes a battery device 100, which includes a box body 2, a battery cell 3 and a cover plate 1. The box body 2 is formed with a mounting cavity 2a, and the mounting cavity 2a has a cavity opening; the battery cell 3 is installed in the mounting cavity 2a of the box body 2; the cover plate 1 is arranged on the box body 2 to cover the cavity opening, and the cover plate 1 includes two main body layers 111 and a noise reduction layer 12 sandwiched between the two main body layers 111. The noise reduction layer 12 includes a base structure and a plurality of noise reduction parts 122 embedded in the main body part 121. The plurality of noise reduction parts 122 are arranged in multiple layers in the thickness direction X of the cover plate 1. The noise reduction part 122 includes a hollow sphere 1221 and is made of a soft material.

[0108] In the vehicle operating condition simulation test, noise detection was performed on the cockpit of a vehicle using a traditional battery pack and the cockpit of a vehicle using the battery device 100 in the technical solution of the present application. The noise detection value of the latter was reduced by 6 to 10 dBA compared with the noise detection value of the former.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: The box body is formed with a mounting cavity, wherein the mounting cavity has a cavity opening; a cover plate, arranged on the box body to cover the cavity opening, wherein a plurality of cavities are formed inside the cover plate, wherein at least some of the cavities are arranged in the thickness direction of the cover plate; and A battery cell is installed in the installation cavity.

2. The battery device according to claim 1, characterized in that The cover plate comprises: A main body portion, at least covering the cavity opening; and A plurality of noise reduction parts are embedded in the main body, and at least one cavity is formed in the noise reduction part.

3. The battery device according to claim 2, characterized in that: The noise reduction portion includes a hollow sphere.

4. The battery device according to claim 2, characterized in that: Two adjacent noise reduction parts are arranged in abutment with each other.

5. The battery device according to claim 2, characterized in that: The noise reduction portion includes a soft noise reduction portion.

6. The battery device according to any one of claims 2 to 5, characterized in that: The body portion includes an epoxy resin base or an acrylic resin base.

7. The battery device according to any one of claims 2 to 5, characterized in that: The multiple noise reduction parts include multiple first noise reduction parts and multiple second noise reduction parts. The outer diameter of the first noise reduction parts is larger than the outer diameter of the second noise reduction parts. The multiple second noise reduction parts are at least distributed on the side ends of the main body along the thickness direction.

8. The battery device according to any one of claims 2 to 5, characterized in that: In the thickness direction, the cover plate includes a noise reduction layer and a main body layer which are connected to each other, the main body layer is connected to the box body, and the noise reduction layer includes the main body portion and a plurality of the noise reduction portions.

9. The battery device according to claim 8, characterized in that: The main body layer includes two main body layers; The noise reduction layer is sandwiched between two of the main body layers.

10. The battery device according to claim 9, characterized in that A receiving cavity is formed between the two main body layers; The noise reduction layer is accommodated in the accommodating cavity.

11. The battery device according to claim 10, characterized in that: The two main bodies are layered to form a connecting edge at the periphery of the accommodating cavity, and the connecting edge is connected to the box body.

12. An electrical device, characterized in that: The invention comprises a battery device as claimed in any one of claims 1 to 11, wherein the battery device is used to provide electrical energy.

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