Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment. The battery device comprises a box body (1); the bottom protection plate (2) is arranged on the outer side of the bottom of the box body (1), and the bottom protection plate (2) and the box body (1) are oppositely arranged at intervals; the elastic element (3) is connected between the bottom of the box body (1) and the bottom protective plate (2); and the limiting parts are located at the bottom of the box body (1) and / or on the bottom protection plate (2), and the limiting parts are arranged corresponding to the elastic elements (3) and are configured to limit the installation positions of the corresponding elastic elements (3). According to the battery device, the mounting positions of the corresponding elastic elements (3) are limited by the limiting parts, so that the supporting stability of the elastic elements is favorably improved, the elastic elements are prevented from plastic deformation and failure under severe impact, and the protection effect of the bottom protection plate is favorably maintained.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and in particular to a battery device and an electrical appliance. Background Technology

[0002] Battery packs typically use a bottom protective plate to protect the bottom of the housing containing the individual battery cells. In related technologies, the bottom protective plate is often made of a single-layer metal plate. Under bumpy road conditions, flying sand and gravel can impact the surface of the bottom protective plate at high frequency, causing it to easily deform or even break, thus rendering its protective function ineffective. This impact can then affect the individual battery cells, reducing the electrochemical performance of the battery pack. Utility Model Content

[0003] The purpose of this application is to provide a battery device and electrical equipment that improves the impact resistance of the bottom guard plate.

[0004] The first aspect of this application provides a battery device, comprising:

[0005] Box;

[0006] A bottom protective plate is provided on the outer side of the bottom of the box and is provided at a distance from the box.

[0007] An elastic element is connected between the bottom of the housing and the bottom protective plate; and

[0008] A limiting part is located at the bottom of the housing and / or the bottom protective plate. The limiting part is provided corresponding to the elastic element and is configured to limit the installation position of the corresponding elastic element.

[0009] In this embodiment, the battery device incorporates an elastic element between the bottom of the casing and the bottom protective plate. A limiting part restricts the installation position of the elastic element, utilizing its vibration-absorbing capacity to effectively resist impacts from sand and gravel onto the bottom protective plate. This improves the impact resistance of the bottom protective plate, extending its fatigue life and maintaining its protective function against impacts. The limiting part enhances the support stability of the elastic element, preventing it from undergoing plastic deformation and failure under severe impacts, thus maintaining the protective function of the bottom protective plate and improving the reliability and durability of the battery device.

[0010] In some embodiments, the limiting portion includes:

[0011] A first limiting component, located at the bottom of the housing, is configured to limit the lateral displacement of the first end of the elastic element near the bottom of the housing; and / or

[0012] The second limiting component, located on the bottom guard plate, is configured to limit the lateral displacement of the elastic element at its second end near the bottom guard plate.

[0013] This embodiment utilizes a first limiting component located at the bottom of the housing to facilitate positioning and support of the first end, and a second limiting component on the bottom guard plate to facilitate positioning and support of the second end. Furthermore, the first and second limiting components respectively constrain both ends of the elastic element, thereby increasing the limiting position of the elastic element and reducing the risk of the elastic element shifting out of its installation position or falling off.

[0014] In some embodiments,

[0015] The first limiting component includes a first boss, which is inserted into the first end; or the first limiting component includes a first groove for receiving the first end; and / or

[0016] The second limiting component includes a second groove for accommodating the second end; or the second limiting component includes a second boss that is inserted into the second end.

[0017] This embodiment, by configuring the first and second limiting components as boss or groove structures, can guide the assembly of the end of the elastic element, facilitating rapid and accurate positioning of the end of the elastic element. This improves the overall structural stability and assembly efficiency of the battery device and effectively limits the lateral displacement of the first and second ends. This allows the limiting components to confine the elastic element to its installation position, ensuring the bottom protection plate effectively protects the bottom of the casing. Furthermore, the groove and boss structures are easy to manufacture, reducing production difficulty and manufacturing costs. They also allow for flexible layout, enabling the installation position of the elastic element to adapt to different operating conditions.

[0018] In some embodiments, the first limiting member and / or the second limiting member includes a boss, the end of the elastic element is sleeved on the boss, and the battery device further includes a buffer member, at least a portion of which is located between the sidewall of the boss and the elastic element.

[0019] This embodiment, by providing a buffer, helps to separate the elastic element from the boss, thereby avoiding noise generated by friction between the elastic element and the boss.

[0020] In some embodiments, a portion of the buffer covers the boss, and another portion of the buffer is disposed around the outer periphery of the root of the boss to separate the end of the elastic element from the bottom guard plate and / or the bottom of the housing.

[0021] This embodiment avoids contact and friction between the elastic element and other structures by having the buffer cover the boss and separating the end of the elastic element from the bottom plate and / or the bottom of the box, which helps to reduce noise.

[0022] In some embodiments, the elastic element is a spring, and the elastic element is configured to extend along the thickness direction of the battery device;

[0023] The first limiting component and the second limiting component are arranged opposite to each other along the thickness direction.

[0024] This embodiment uses a first limiting component and a second limiting component arranged opposite to each other along the thickness direction of the battery device. When sand and gravel hit the bottom guard plate, the elastic element extends and retracts along the first direction. This avoids the generation of additional torque due to the fact that the force exerted by the first limiting component on the first end and the force exerted by the second limiting component on the second end are not on the same straight line. This helps to balance the force on the first end and the second end of the elastic element, thereby enabling the elastic element to rebound smoothly when the bottom guard plate is impacted, improving the buffering and vibration absorption effect and structural reliability of the bottom of the battery device.

[0025] In some embodiments, the bottom of the housing includes a first region and a second region, wherein the thickness of the first region is less than the thickness of the second region;

[0026] The projection of the elastic element on the bottom of the box is located within the first region.

[0027] In this embodiment, the projection of the elastic element on the bottom of the housing is located in the first region, which helps to protect the weak area of ​​the bottom of the housing by utilizing the vibration absorption capacity of the elastic element, thereby helping to avoid damage to the bottom of the housing from impact.

[0028] In some embodiments, the battery device further includes:

[0029] A beam, disposed within the box, is configured to divide the space within the box into multiple receiving cavities; and

[0030] Multiple battery cells are disposed within multiple of the aforementioned receiving cavities;

[0031] The elastic element is located in the region corresponding to the battery cell.

[0032] This embodiment places the elastic element in the area corresponding to the battery cell, so that the elastic element can be used to absorb the impact of the external environment on the battery cell in a targeted manner, which helps to enhance the protection effect of the battery cell.

[0033] In some embodiments, the battery device further includes a vibration-absorbing coating that covers the side of the bottom protective plate away from the housing.

[0034] This embodiment enhances the protective capability of the bottom guard plate by incorporating a vibration-absorbing coating.

[0035] According to a second aspect of this application, an electrical device is provided, including the battery device of the above embodiments.

[0036] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of some embodiments of the battery device installed in a vehicle according to this application.

[0039] Figure 2 This is a schematic diagram of the structure of a battery device according to some embodiments of this application.

[0040] Figure 3 This is a schematic diagram of the structure of some embodiments of the present application, showing the elastic element located between the bottom of the housing and the bottom protective plate.

[0041] Figure 4 This is a schematic diagram of the structure in which the first end of the elastic element of some embodiments of this application is inserted into the first limiting component.

[0042] Figure 5 This is a schematic diagram of the structure in which the second end of the elastic element of some embodiments of this application is welded to the second limiting component.

[0043] Figure 6 This is a side view of some embodiments of the present application showing the elastic element located between the bottom of the housing and the bottom guard plate.

[0044] Figure 7 This is a cross-sectional view of the elastic element located between the bottom of the housing and the bottom guard plate in some embodiments of this application.

[0045] Figure 8 This is a top view of the bottom protective plate of some embodiments of this application.

[0046] The accompanying drawings are not drawn to scale.

[0047] Marker explanation:

[0048] 1. Housing; 1A. Housing section; 1B. Cover section; 2. Bottom guard plate; 3. Elastic element; 41. First limiting component; 42. Second limiting component; 5. Buffer component;

[0049] 100. Battery cell;

[0050] 200. Battery device;

[0051] 300. Vehicle; 301. Cabin; 302. Floor. Detailed Implementation

[0052] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0053] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0054] This application uses terms such as "upper," "lower," "top," "bottom," "front," "back," "inner," and "outer" to indicate orientation or positional relationships. This is only for the convenience of describing this application and is not intended to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the scope of protection of this application.

[0055] Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" does not mean strictly vertical, but rather within the permissible range of error. "Parallel" does not mean strictly parallel, but rather within the permissible range of error. The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application.

[0056] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances.

[0057] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least some of the embodiments of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0058] The power battery is large and heavy. Placing it under the chassis can effectively lower the vehicle's center of gravity, reduce the risk of rollover during high-speed driving or sharp turns, and avoid taking up interior space, thus improving passenger comfort.

[0059] The bottom protector, as a protective component at the bottom of the battery, protects the bottom of the battery casing from impacts such as sand and gravel. It also forms a sealed space with the casing to prevent internal corrosion. Bottom protectors are typically made using conventional sheet metal forming processes, resulting in poor impact resistance. Impacts from sand and gravel kicked up from the road can cause localized stress concentrations, easily leading to microcracks and structural failure of the bottom protector. Furthermore, the impact energy transmitted to the battery through vibration can also damage the electrochemical performance of individual battery cells.

[0060] To address the aforementioned deficiencies, this application aims to improve the bottom guard plate's impact resistance, thereby enhancing its protective function against impacts on the bottom of the enclosure.

[0061] Based on this improvement idea, this application provides an improved battery device 200 for providing electrical energy to electrical devices.

[0062] Electrical equipment can include mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0063] like Figure 1 As shown, the electrical equipment can be a vehicle 300, such as a new energy vehicle, which can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle; or the electrical equipment can be a drone or a ship. The vehicle 300 may include a cabin 301 and a vehicle floor 302, with a battery device 200 located between the cabin 301 and the vehicle floor 302. The battery device 200 can be located at the bottom, front, or rear of the vehicle 300, and is used to provide electrical power for the motor and other components in the vehicle.

[0064] The battery assembly 200 includes a housing 1, a bottom protective plate 2, an elastic element 3, and a limiting part. For example... Figure 2As shown, the housing 1 is hollow inside, used to accommodate one or more battery cells 100. Depending on the shape, number, arrangement, and other requirements of the battery cells 100, the housing 1 can also have different shapes and sizes. For example, the housing 1 may include a housing section 1A and a cover section 1B. The end of the housing section 1A has an opening, and the cover section 1B is used to close the opening of the housing section 1A. For example, depending on the arrangement of the multiple battery cells 100, the housing section 1A may have a rectangular cylindrical structure. To facilitate the maintenance of the battery device 200, the housing 1 is detachably installed on the electrical equipment.

[0065] Optionally, structural components of the electrical equipment form a space for accommodating the battery cell 100, which functions similarly to the housing 1 in the battery pack 200. For example, when the battery cell 100 is used in a vehicle 300, the frame forms a space for accommodating the battery cell 100. The underbody protection plate 2 is located below the frame.

[0066] In some embodiments, such as Figures 3 to 8 As shown, the battery device 200 of this application includes:

[0067] Box 1;

[0068] Bottom guard plate 2 is provided on the outer side of the bottom of the box 1 and is provided at a distance from the box 1;

[0069] Elastic element 3 is connected between the bottom of the housing 1 and the bottom guard plate 2; and

[0070] A limiting part is located at the bottom of the housing 1 and / or on the bottom guard plate 2. The limiting part is provided corresponding to the elastic element 3 and is configured to limit the installation position of the corresponding elastic element 3.

[0071] The limiting part can restrict the installation position of the elastic element 3 by restricting the degree of freedom of the elastic element 3 on the side near the bottom of the box or the bottom guard plate 2, or by restricting the degree of freedom of the middle area or other areas of the elastic element 3, so that the elastic element 3 will not shift laterally or fall off after being assembled with the limiting part.

[0072] Optionally, the elastic element 3 and the limiting part can be connected and fixed by means of plugging, snapping or welding.

[0073] Optionally, such as Figures 3 to 7 As shown, the elastic element 3 can be a spring, extending along a direction perpendicular to the bottom of the bottom cover plate 2 and the bottom of the housing 1 (i.e., the thickness direction of the battery device 200). Using a spring as the elastic element 3 simplifies the structure of the elastic element 3, reduces manufacturing costs, lightens the weight of the elastic element 3, and makes it easier to adapt the elastic element 3 to different working conditions by changing the material and parameters of the spring.

[0074] Alternatively, the elastic element 3 can also be a rubber part or a spring damper, etc.

[0075] Optionally, the battery device 200 may include a plurality of elastic elements 3, which may be distributed in a regular shape, such as being spaced apart along a circle or ellipse, or arranged in a matrix array, or the lines connecting the plurality of elastic elements 3 may be polygonal, such as triangles, rectangles, or trapezoids. The plurality of elastic elements 3 may also be arranged in an irregular shape.

[0076] Optionally, the battery device 200 may include an elastic element 3, such as a spring or a rubber pad.

[0077] In this embodiment, the battery device 200 has an elastic element 3 between the bottom of the housing 1 and the bottom protective plate 2. A limiting part restricts the installation position of the elastic element 3, effectively resisting the impact of sand and gravel on the bottom protective plate 2 by utilizing the vibration-absorbing capacity of the elastic element 3. This improves the impact resistance of the bottom protective plate 2, thereby extending its fatigue life and maintaining its protective function against impacts on the bottom of the housing 1. The limiting part enhances the supporting stability of the elastic element 3, preventing it from undergoing plastic deformation and failure under severe impact, thus maintaining the protective function of the bottom protective plate 2 and improving the operational reliability and durability of the battery device 200.

[0078] In addition, the elastic element 3 and the limiting part work together to improve the connection strength between the bottom guard plate 2 and the bottom of the box 1, thereby improving the structural strength of the bottom structure of the battery device 200.

[0079] In some embodiments, such as Figure 4 , Figure 5 and Figure 7 As shown, the limiting part includes:

[0080] The first limiting component 41, located at the bottom of the housing 1, is configured to limit the lateral displacement of the first end of the elastic element 3 near the bottom of the housing 1; and / or

[0081] The second limiting component 42, located on the bottom guard plate 2, is configured to limit the lateral displacement of the elastic element 3 near the second end of the bottom guard plate 2.

[0082] The first limiting component 41 can contact the side and / or end face of the first end to limit the lateral displacement of the first end, and the second limiting component 42 can also contact the side and / or end face of the second end to limit the lateral displacement of the second end.

[0083] like Figure 5As shown, the housing 1 may include a bottom plate, the first end of the elastic element 3 is connected to the side of the bottom plate facing the bottom guard plate 2, and the second end of the elastic element 3 is connected to the side of the bottom guard plate 2 facing the bottom plate.

[0084] This embodiment utilizes a first limiting component 41 located at the bottom of the housing 1 to facilitate positioning and support of the first end, and a second limiting component 42 on the bottom guard plate 2 to facilitate positioning and support of the second end. Furthermore, the first limiting component 41 and the second limiting component 42 can respectively constrain both ends of the elastic element 3, thereby increasing the limiting position of the limiting part on the elastic element 3 and reducing the risk of the elastic element 3 shifting from its installation position or falling off.

[0085] In some embodiments, such as Figure 4 and Figure 7 As shown, the first limiting member 41 includes a first boss that is inserted into the first end; or the first limiting member 41 includes a first groove for receiving the first end; and / or

[0086] The second limiting member 42 includes a second groove for receiving the second end; or the second limiting member 42 includes a second boss that is inserted into the second end.

[0087] Optionally, the first and second bosses can be cylinders. The first end of the elastic element 3 may include a hole that mates with the first boss, allowing the first boss to be inserted into the first end. The second end of the elastic element 3 may also include a hole that mates with the second boss, allowing the second boss to be inserted into the second end. For example, the elastic element 3 can be a spring, and the first and second bosses can be inserted into the port of the spring. Alternatively, the elastic element 3 can also be a rubber component with holes at its ends that mate with the first and second bosses.

[0088] Optionally, the first boss can be stamped at the bottom of the housing 1, and the second boss can be stamped at the bottom guard plate 2. The first boss and the second boss can also be independently processed parts, for example, formed by machining, injection molding or casting, and then fixed to the bottom of the housing 1 by fasteners or welding.

[0089] The first end can be inserted into the first groove, or it can be welded to the bottom of the housing 1 within the first groove. The second end can be inserted into the second groove, or it can be welded to the bottom protective plate 2 within the second groove.

[0090] Optionally, such as Figure 4 , Figure 5 and Figure 7As shown, the first limiting component 41 includes a first boss, the second limiting component 42 includes a second groove, and the elastic element 3 is a spring. The first end of the elastic element 3 is inserted into the first boss, and the second end of the elastic element 3 is welded into the second groove. When assembling the battery device 200, the second end is first welded into the second limiting component 42, and then the first end of the elastic element 3 is aligned with the first limiting component 41 for insertion. This facilitates positioning the installation position of the elastic element 3 by first using the position of the second limiting component 42, and then guiding the first end of the elastic element 3 for installation by using the first boss, thereby improving installation efficiency. In addition, the first limiting component 41 being a first boss helps to strengthen the structural strength of the bottom of the housing 1.

[0091] Optionally, in an embodiment not shown, the first limiting member 41 includes a first groove, and the second limiting member 42 includes a second boss.

[0092] Optionally, in an embodiment not shown, the first limiting member 41 includes a first groove and the second limiting member includes a second groove, so as to extend the length of the elastic element 3, thereby enhancing the vibration absorption capacity of the elastic element 3.

[0093] Optionally, in an embodiment not shown, the first limiting component 41 includes a first boss and the second limiting component 42 includes a second boss, which facilitates rapid positioning and assembly of the elastic element 3 and improves installation efficiency.

[0094] This embodiment, by configuring the first limiting component 41 and the second limiting component 42 as a boss structure or a groove structure, can guide the assembly of the end of the elastic element 3, which is beneficial for the rapid and accurate positioning of the end of the elastic element 3, improving the overall structural stability and assembly efficiency of the battery device 200. It also effectively limits the lateral displacement of the first and second ends, thus helping the limiting parts to confine the elastic element 3 to the installation position, ensuring the protective effect of the bottom guard plate 2 on the bottom of the housing 1. Furthermore, the groove and boss structures are easy to process, reducing production difficulty and manufacturing costs, and allowing for flexible layout so that the installation position of the elastic element 3 can adapt to different working conditions.

[0095] Optionally, in an embodiment not shown, the first limiting member 41 may include a slot, and the first end of the elastic element 3 includes a locking head that engages with the slot. The first limiting member 41 restricts the lateral displacement of the first end by engaging with the first end of the elastic element 3.

[0096] Optionally, in an embodiment not shown, the second limiting member 42 may also include a slot, and the second end of the elastic element 3 includes a locking head that engages with the slot. The second limiting member 42 restricts the lateral displacement of the second end by engaging with the second end of the elastic element 3.

[0097] Optionally, in an embodiment not shown, the elastic element 3 is a spring, and the first limiting component 41 may include a baffle plate. The baffle plate is arranged circumferentially around the spring and includes a main body and a flange. The main body is aligned with the extension direction of the spring and abuts against the side of the first end of the elastic element 3. The flange is inserted between two adjacent spring coils at the first end of the elastic element 3 to limit the lateral displacement of the first end.

[0098] Optionally, in an embodiment not shown, the elastic element 3 is a spring, and the second limiting member 42 may include a baffle. The main body of the baffle abuts against the side of the second end of the elastic element 3, and the flange is inserted between two adjacent spring coils of the second end of the elastic element 3 to limit the lateral displacement of the second end.

[0099] In some embodiments, such as Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, the first limiting member 41 and / or the second limiting member 42 include a boss, the end of the elastic element 3 is sleeved on the boss, and the battery device 200 also includes a buffer member 5, at least a portion of which is located between the side wall of the boss and the elastic element 3.

[0100] Optionally, the buffer 5 may cover the entire boss or only cover the sidewalls of the boss.

[0101] Optionally, the cushioning element 5 can be made of materials such as cotton pads or rubber pads.

[0102] This embodiment, by providing a buffer 5, helps to separate the elastic element 3 from the boss, thereby avoiding noise generated by friction between the elastic element 3 and the boss.

[0103] In some embodiments, such as Figure 3 , Figure 4 and Figure 7 As shown, a portion of the buffer 5 covers the boss, and another portion of the buffer 5 is arranged around the outer periphery of the root of the boss to separate the end of the elastic element 3 from the bottom guard plate 2 and / or the bottom of the housing 1.

[0104] Optionally, the first limiting member 41 is a boss, and part of the buffer member 5 can be attached to the bottom of the box 1 and located between the end of the elastic element 3 and the bottom of the box 1.

[0105] Optionally, the second limiting member 42 is a boss, and part of the buffer member 5 can be attached to the upper surface of the bottom guard plate 2 and located between the end of the elastic element 3 and the bottom guard plate 2.

[0106] In this design, the outer periphery of the portion of the buffer 5 surrounding the root of the boss is located at the outer periphery of the end of the elastic element 3, to prevent the elastic element 3 from contacting the bottom guard plate 2 and / or the bottom of the housing 1, thereby improving the shock absorption and noise reduction effects. Furthermore, this arrangement allows for a larger size of the buffer 5, ensuring that even when the end of the elastic element 3 detaches from the boss and the buffer 5 moves away from the boss due to friction, the buffer 5 still covers the space between the elastic element 3 and the boss.

[0107] Optionally, the outer periphery of the portion of the buffer 5 surrounding the root of the boss can be any closed shape such as a circle, rectangle, ellipse or polygon.

[0108] This embodiment avoids contact and friction between the elastic element 3 and other structures by having the buffer 5 cover the boss and separate the end of the elastic element 3 from the bottom guard plate 2 and / or the bottom of the box 1, which is beneficial for noise reduction.

[0109] In some embodiments, the elastic element 3 is a spring, and the elastic element 3 is configured to extend along the thickness direction of the battery device 200;

[0110] The first limiting component 41 and the second limiting component 42 are arranged opposite to each other along the thickness direction.

[0111] In this embodiment, the first limiting component 41 and the second limiting component 42 are arranged opposite to each other along the thickness direction of the battery device 200. When sand and gravel hit the bottom guard plate 2, the elastic element 3 extends and retracts along the first direction. This avoids the generation of additional torque due to the fact that the force exerted by the first limiting component 41 on the first end and the force exerted by the second limiting component 42 on the second end are not on the same straight line. This helps to balance the force on the first end and the second end of the elastic element 3, thereby helping the elastic element 3 to rebound smoothly when the bottom guard plate 2 is impacted, improving the buffering and vibration absorption effect and structural reliability of the bottom of the battery device 200.

[0112] In some embodiments, the bottom of the housing 1 includes a first region and a second region, wherein the thickness of the first region is less than the thickness of the second region;

[0113] Among them, the projection of the elastic element 3 on the bottom of the box 1 is located in the first region.

[0114] Optionally, the second area may include structures such as reinforcing bars and beams.

[0115] In this embodiment, the projection of the elastic element 3 on the bottom of the housing 1 is located in the first region, which is beneficial to use the vibration absorption capacity of the elastic element 3 to protect the weak area at the bottom of the housing 1, thereby helping to avoid damage to the bottom of the housing 1 from impact.

[0116] In some embodiments, the projection of the elastic element 3 on the bottom of the housing 1 may also be located in the second region. This arrangement is beneficial to increasing the depth of the groove when the first limiting member 41 is set as a groove, thereby facilitating the extension of the length of the elastic element 3.

[0117] In some embodiments, the battery device 200 further includes:

[0118] A beam, located within box 1, is configured to divide the space within box 1 into multiple receiving cavities; and

[0119] Multiple battery cells 100 are arranged in multiple receiving cavities;

[0120] Among them, the elastic element 3 is located in the area corresponding to the battery cell 100.

[0121] The limiting part positions the elastic element 3 on one side of the receiving cavity along the thickness direction of the battery device 200.

[0122] This embodiment places the elastic element 3 in the area corresponding to the battery cell 100, so that the elastic element 3 can be used to absorb the impact of the external environment on the battery cell 100 in a targeted manner, which helps to enhance the protection effect of the battery cell 100.

[0123] In some embodiments, the battery device 200 further includes a vibration-absorbing coating that covers the side of the bottom cover 2 away from the housing 1.

[0124] Alternatively, the vibration-absorbing coating can be made of rubber, resin, or other materials.

[0125] This embodiment enhances the protective capability of the bottom protective plate 2 by providing a vibration-absorbing coating.

[0126] In some embodiments, the battery device 200 further includes a sealing portion configured to seal the space between the bottom of the housing 1 and the bottom cover 2.

[0127] Alternatively, the sealing part can be a flexible cover, etc.

[0128] This embodiment, by providing a sealing part, helps to prevent the space between the bottom guard plate 2 and the bottom of the box 1 from communicating with the outside, which helps to improve the corrosion resistance of the bottom guard plate 2, the elastic element 3 and the bottom of the box 1, thereby helping to extend the service life of the battery device 200.

[0129] The following combination Figures 3 to 8 The battery device 200 according to the embodiments of this disclosure will be described in detail.

[0130] like Figures 3 to 8As shown, the battery device 200 includes a housing 1, a bottom protective plate 2, multiple elastic elements 3 (only one elastic element 3 is shown in the figure), multiple limiting parts, and a buffer member 5. The elastic elements 3 are connected between the bottom of the housing 1 and the bottom protective plate 2. The limiting parts are provided corresponding to the elastic elements 3 to restrict the installation position of the elastic elements 3.

[0131] like Figures 3 to 8 As shown, the limiting part includes a first limiting component 41 and a second limiting component 42. The first limiting component 41 is connected to the bottom of the housing 1, and the second limiting component 42 is located on the bottom guard plate 2. The first limiting component 41 and the second limiting component 42 are arranged opposite each other in the vertical direction so that the elastic element 3 extends in the vertical direction. The first limiting component 41 is a cylindrical boss. The second limiting component 42 is a groove.

[0132] like Figures 3 to 7 As shown, the elastic element 3 is a spring. The first end of the elastic element 3 is sleeved outside the first limiting component 41, and the second end of the elastic element 3 is welded inside the second limiting component 42.

[0133] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, a portion of the buffer 5 covers the first limiting member 41, and another portion of the buffer 5 is attached to the bottom of the box 1, separating the first end of the elastic element 3 from the bottom of the box 1.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and not to limit them; although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this application or equivalent substitutions can be made to some technical features, all of which should be covered within the scope of the technical solutions claimed in this application.

Claims

1. A battery device, characterized in that, include: Box (1); Bottom guard plate (2) is provided on the outside of the bottom of the box (1) and is provided at a distance from the box (1); The elastic element (3) is connected between the bottom of the housing (1) and the bottom guard plate (2); and The limiting part is provided corresponding to the elastic element (3) and includes a first limiting component (41) and / or a second limiting component (42). The first limiting component (41) is located at the bottom of the housing (1) and is configured to limit the lateral displacement of the first end of the elastic element (3) near the bottom of the housing (1). The second limiting component (42) is located on the bottom guard plate (2) and is configured to limit the lateral displacement of the second end of the elastic element (3) near the bottom guard plate (2).

2. The battery device according to claim 1, characterized in that, The first limiting member (41) includes a first boss that is inserted into the first end; or the first limiting member (41) includes a first groove for receiving the first end; and / or The second limiting member (42) includes a second groove for receiving the second end; or the second limiting member (42) includes a second boss that is inserted into the second end.

3. The battery device according to claim 1, characterized in that, The first limiting component (41) and / or the second limiting component (42) include a boss, the end of the elastic element (3) is sleeved on the boss, and the battery device (200) further includes a buffer (5), at least a portion of which is located between the side wall of the boss and the elastic element (3).

4. The battery device according to claim 3, characterized in that, A portion of the buffer (5) covers the boss, and another portion of the buffer (5) is arranged around the outer periphery of the root of the boss to separate the end of the elastic element (3) from the bottom guard plate (2) and / or the bottom of the box (1).

5. The battery device according to claim 1, characterized in that, The elastic element (3) is a spring, and the elastic element (3) is configured to extend along the thickness direction of the battery device (200); The first limiting component (41) and the second limiting component (42) are arranged opposite to each other along the thickness direction.

6. The battery device according to any one of claims 1-5, characterized in that, The bottom of the box (1) includes a first region and a second region, wherein the thickness of the first region is less than the thickness of the second region; The projection of the elastic element (3) on the bottom of the box (1) is located in the first region.

7. The battery device according to any one of claims 1-5, characterized in that, The battery device also includes: A beam, located within the housing (1), is configured to divide the space within the housing (1) into multiple receiving cavities; and Multiple battery cells (100) are disposed within multiple receiving cavities; The elastic element (3) is located in the region corresponding to the battery cell (100).

8. The battery device according to any one of claims 1-5, characterized in that, The battery device also includes a vibration-absorbing coating that covers the side of the bottom protective plate (2) away from the housing (1).

9. An electrical appliance, characterized in that, The battery device (200) includes any one of claims 1 to 8, the battery device (200) being used to provide electrical energy to the electrical equipment.

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