Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, and belongs to the technical field of batteries. The battery device comprises a battery single body assembly, a box body and a lifting lug, the battery single body assembly comprises at least two battery single bodies, the battery single body assembly is installed in the box body, the lifting lug is used for installing a device body of the electric device, the lifting lug comprises a first supporting lug and a second supporting lug which are connected to the outer side of the box body, and the first supporting lug and the second supporting lug make contact with each other; a weight reduction cavity is defined by the first supporting lug, the second supporting lug and the box body. The first supporting lug and the second supporting lug enable the lifting lug to be of a hollow structure, the weight of the lifting lug is small, the weight of the corresponding battery device is small, and the mass energy density of the battery device can be improved. When the lifting lug is installed on the electric device, the first supporting lug and the second supporting lug are in contact with each other, so that the first supporting lug and the second supporting lug can support each other, the strength of the lifting lug is improved, and the mass energy density of the battery device and the strength of the lifting lug are both considered.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and in particular, to a battery device and an electrical device. Background Art

[0002] Batteries are increasingly widely used in life and industry. For example, new energy vehicles equipped with batteries have been widely used.

[0003] In new energy vehicles equipped with batteries, the batteries can be used to provide power entirely or partially. The battery device is installed on the new energy vehicle through lugs. In the related art, it is difficult for the lugs of the battery device to balance strength and mass energy density. Summary of the Utility Model

[0004] To solve the above technical problems, this application provides a battery device and an electrical device, so that the lugs of the battery device can balance strength and mass energy density.

[0005] This application is implemented through the following technical solutions.

[0006] The first aspect of the embodiments of this application provides a battery device, including:

[0007] A battery cell assembly, including at least two battery cells;

[0008] A box body, where the battery cell assembly is installed in the box body;

[0009] Lugs, used to install the device body of the electrical device. The lugs include a first support ear and a second support ear connected to the outside of the box body. The first support ear and the second support ear are in contact with each other, and the first support ear, the second support ear, and the box body enclose a weight reduction cavity.

[0010] In the embodiments of this application, the first support ear and the second support ear make the lugs have a hollow structure, the mass of the lugs is small, and correspondingly, the mass of the battery device is small. The first support ear and the second support ear can support each other, which is beneficial to improving the strength of the lugs, so as to balance the mass energy density of the battery device and the strength of the lugs.

[0011] In one embodiment, the box body includes:

[0012] A carrier box, where the battery cell assembly is installed in the carrier box. The first support ear and the second support ear are both connected to the outside of the carrier box. The first support ear and the second support ear are connected, and the first support ear, the second support ear, and the carrier box enclose the weight reduction cavity;

[0013] A box cover, covering the carrier box, and the battery cell assembly is located in the space enclosed by the carrier box and the box cover.

[0014] In the embodiments of the present application, both the first support ear and the second support ear that are connected to each other are within the carrying box, and the opening and closing of the box cover are not restricted by the first support ear and the second support ear.

[0015] In one embodiment, the carrying box includes:

[0016] A main box, where the battery cell assembly is installed in the main box, and the first support ear is connected to the outside of the main box;

[0017] A flange that surrounds the main box. The flange is connected to the side of the main box facing the box cover, and the box cover is connected to the flange. The battery cell assembly is located in the space enclosed by the main box, the flange, and the box cover. The second support ear is connected to the outside of the flange, and the first support ear, the main box, the flange, and the second support ear enclose the weight reduction cavity.

[0018] In the embodiments of the present application, the second support ear can be well supported by the first support ear on the main box, and the flange can increase the strength of the first support ear to a certain extent.

[0019] In one embodiment, the main box, the flange, and the second support ear are integrally formed, and the first support ear is independently formed and is respectively connected to the main box and the second support ear.

[0020] In the embodiments of the present application, the first support ear is independently formed and then installed, which is convenient for the production of the first support ear and reduces the number of non-standard parts.

[0021] In one embodiment, the first support ear is respectively welded to the main box and the second support ear.

[0022] In the embodiments of the present application, welding makes the connection between the first support ear and the main box and the second support ear firm, and the welded connection is less affected by temperature.

[0023] In one embodiment, the second support ear connected to the flange is formed with a first ventilation hole, and the first ventilation hole communicates with the weight reduction cavity.

[0024] In the embodiments of the present application, the communication between the first ventilation hole and the weight reduction cavity can balance the pressure in the weight reduction cavity and prevent the pressure in the weight reduction cavity from being too high due to temperature changes.

[0025] In one embodiment, the second support ear is a sheet metal part, and the second support ear is further formed with a groove that is recessed toward the weight reduction cavity, and the first ventilation hole is formed on the wall of the groove.

[0026] In the embodiments of the present application, the strength of the grooved reinforcing sheet metal part is enhanced. The groove increases the ventilation space of the first ventilation hole, reducing the possibility of the first ventilation hole being blocked by the electrical device. The relatively small first ventilation hole prevents the strength of the second support ear from decreasing.

[0027] In one embodiment, the side of the second support ear facing away from the first support ear is used to mount the device body of the electrical device. The main box, the flanging, the first support ear, and the second support ear also enclose a second ventilation hole, which communicates with the weight reduction cavity. The second ventilation hole is located on the side of the second support ear facing the first support ear.

[0028] In the embodiments of the present application, the second ventilation hole is arranged to avoid the electrical device, reducing the possibility of the second ventilation hole being blocked by the electrical device, which is beneficial to the pressure balance in the weight reduction cavity.

[0029] In one embodiment, the lifting lug has a lifting hole. The first support ear includes:

[0030] A support body, connected to the outside of the bearing box;

[0031] A support column, connected between the support body and the second support ear. The lifting hole penetrates through the second support ear, the support column, and the support body. The support body, the support column, the second support ear, and the bearing box enclose the weight reduction cavity.

[0032] In the embodiments of the present application, the support column supports the first support ear and the second support ear, reducing the deformation of the first support ear and the second support ear under stress.

[0033] In one embodiment, the lifting lugs are correspondingly arranged on the opposite sides of the box body along the first direction. At least one battery cell assembly straddles the opposite sides of the box body along the first direction, and at least two of the battery cells in each battery cell assembly are arranged along the first direction.

[0034] In the embodiments of the present application, the number of battery cell assemblies can be reduced in the first direction, improving the volume utilization rate of the battery device.

[0035] In one embodiment, the number of battery cell assemblies is at least two, and at least two battery cell assemblies are arranged along the second direction, which intersects with the first direction.

[0036] In the embodiments of the present application, by arranging at least two battery cell assemblies in the second direction, the number of battery cell assemblies is not limited by the width in the first direction, and the battery device can provide more electrical energy for the electrical device.

[0037] In one embodiment, a charging interface is provided on one side of the box body along the second direction, and the second direction is arranged crosswise to the first direction.

[0038] In the embodiment of the present application, the charging interface facilitates charging the battery device, which is beneficial to the cyclic charging and discharging of the battery device.

[0039] In one embodiment, the battery device further includes a positioning pin. The number of the lifting lugs is at least two. The second support ears of at least two of the lifting lugs are connected with the positioning pin, and the positioning pin is used for positioning the position of the box body relative to the electrical device.

[0040] In the embodiment of the present application, the positioning pin helps to position the box body relative to the electrical device, which is beneficial to installing the battery device onto the electrical device and reduces the installation time and difficulty of the battery device.

[0041] In the second aspect of the embodiment of the present application, an electrical device is provided, including:

[0042] A device main body;

[0043] The battery device according to any one of the above, and the lifting lug is installed on the device main body.

[0044] In the embodiment of the present application, the first support ear and the second support ear make the lifting lug have a hollow structure. The mass of the lifting lug is small, and correspondingly, the mass of the battery device is small. The first support ear and the second support ear can support each other, which is beneficial to improving the strength of the lifting lug, so as to balance the mass energy density of the battery device and the strength of the lifting lug.

[0045] In one embodiment, the electrical device is a vehicle, and the lifting lugs are correspondingly provided on opposite sides of the box body along the first direction, and the first direction is perpendicular to the forward direction of the vehicle.

[0046] In the embodiment of the present application, the longitudinal beam for strengthening the load bearing can be omitted in the second direction of the box body, reducing the mass of the battery device and improving the mass energy density of the battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0048] Figure 1 is a schematic structural diagram of the battery device according to the embodiment of the present application, and the box cover is shown in the figure;

[0049] Figure 2 is Figure 1The perspective view at position A in [the figure];

[0050] Figure 3 FIG. [number] is a schematic structural view of the battery device according to an embodiment of the present application, and the lid of the box is not shown in the figure;

[0051] Figure 4 is Figure 1 the sectional view taken along line B-B in [the figure].

[0052] Explanation of reference numerals

[0053] 1. Lifting lug; 11. First support lug; 111. Support body; 112. Support column; 12. Second support lug; 121. First ventilation hole; 122. Groove; 2. Box body; 21. Carrying box; 211. Main box; 212. Flange; 22. Lid of the box; 3. Battery cell assembly; 31. Battery cell; 4. Weight reduction cavity; 5. Second ventilation hole; 6. Lifting hole; 7. Charging interface; 8. Positioning pin. Detailed implementation manners

[0054] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled 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" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0056] In the description of the embodiments of the present application, technical terms such as "first", "second", "third", etc. are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "at least two" means more than two unless otherwise specifically defined.

[0057] Referring to "embodiment" herein means that a specific feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of this application. The phrase appears at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0058] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0059] 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.

[0060] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0061] In the related art, the battery device is installed on the device body of the electric device through the lifting lug. When the lifting lug is supported by a single plate, the strength of the lifting lug may be insufficient. When the lifting lug is a solid block with a relatively thick thickness to basically meet the strength requirements of the lifting lug, the mass of the lifting lug is relatively large, and the mass of the corresponding battery device is relatively large, and the mass energy density of the battery device is relatively low. Therefore, it is difficult for the lifting lug to take into account both the strength of the lifting lug and the mass energy density of the battery device.

[0062] The battery device of the embodiment of the present application includes a battery cell assembly 3, a box body 2 and a lifting ear 1, the lifting ear 1 includes a first supporting ear 11 and a second supporting ear 12, the first supporting ear 11, the second supporting ear 12 and the box body 2 are arranged to form a weight reduction cavity 4, so that the mass of the lifting ear 1 is smaller, thereby taking into account both the mass energy density of the battery device and the strength of the lifting ear 1.

[0063] The battery device may be a battery pack or an energy storage device.

[0064] The energy storage device is a device for storing electrical energy, such as an energy storage cabinet or an energy storage container. The battery device of the embodiment of the present application is suitable for use in electrical devices.

[0065] The embodiment of the present application provides an electric device, which includes a device body and a battery device, and a hanging ear 1 is installed on the device body.

[0066] An electrical device is a device that uses electrical energy as an energy source and realizes corresponding functions by consuming electrical energy. Exemplarily, the electrical device can be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric plane toy, etc., and the spacecraft can include an airplane, a rocket, a space shuttle, a spaceship, etc.

[0067] The device body refers to the main structure that consumes electrical energy to realize corresponding functions. For example, if the electrical device is a mobile phone, the device body is the part that can realize functions such as communication, and is powered by the battery cell 31 or the battery device to the part that can realize functions such as communication. For example, if the electrical device is a car, the device body is the part for people to ride and can travel on the road, and is powered by the battery cell 31 or the battery device to the part for people to ride and can travel on the road.

[0068] Taking the electrical device of an embodiment of the present application as a vehicle and the battery device as a battery pack as an example for illustration.

[0069] The vehicle provided by an embodiment of the present application 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 pack is arranged inside the vehicle, and the battery pack can be arranged at the bottom, head or tail of the vehicle. The battery pack can be used for power supply of the vehicle. For example, the battery pack can be used as the operating power supply of the vehicle. The vehicle can also include a controller and a motor, and the controller can be used to control the battery pack to supply power to the motor. For example, the battery pack can be used for the working power consumption requirements during the start, navigation and driving of the vehicle.

[0070] In some embodiments of the present application, the battery pack can not only be used as the operating power supply of the vehicle, but also be used as the driving power supply of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0071] For the battery device of the embodiment of the present application, please refer to Figures 1 to 4 , the battery device includes a battery cell assembly 3, a box body 2 and a lifting lug 1. The battery cell assembly 3 includes at least two battery cells 31. The battery cell assembly 3 is installed in the box body 2. The lifting lug 1 is used to install the device body of the electrical device. The lifting lug 1 includes a first support ear 11 and a second support ear 12 connected to the outside of the box body 2. The first support ear 11 and the second support ear 12 are in contact with each other. The first support ear 11, the second support ear 12 and the box body 2 enclose a weight reduction cavity 4.

[0072] The box body 2 refers to a structure with an accommodation space. The battery cell assembly 3 is located in the box body 2, and the battery cells 31 of the battery device are accommodated by the box body 2.

[0073] The battery cell assembly 3 can be a module, or the battery cell assembly 3 can be placed in the box body 2 after series and parallel connection but does not form a module.

[0074] The battery cell assembly 3 includes at least two battery cells 31. The at least two battery cells 31 can be connected in series, parallel or in a mixed connection. A mixed connection means that there are both series and parallel connections among the at least two battery cells 31. The at least two battery cells 31 can be directly connected in series, parallel or in a mixed connection together, and then the whole formed by the at least two battery cells 31 is placed in the box body 2. The battery device can also include other structures. For example, the battery device can also include a busbar component for realizing the electrical connection between the at least two battery cells 31.

[0075] The battery cell 31 includes a housing, an electrode assembly and a conductive terminal. The housing can be a sealed structure or a non-sealed structure. Exemplarily, when the housing is a non-sealed structure, the housing plays a role in protecting the motor assembly, and a sealing bag is further included between the housing and the electrode assembly. The sealing bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating part or an aluminum-plastic film. Exemplarily, the conductive terminal can be a positive and negative electrode post.

[0076] The electrode assembly can be a wound structure or a stacked structure.

[0077] The battery cell 31 can be a secondary battery, which means a battery cell 31 that can be activated by charging after discharging to continue to be used.

[0078] The battery cell 31 can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium-metal battery, a sodium-metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc. The embodiments of the present application are not limited thereto.

[0079] The number of the lifting lugs 1 is not limited. Exemplarily, the number of the lifting lugs 1 is at least two. Exemplarily, the number of the lifting lugs 1 is 2, 4 or 6.

[0080] The mass energy density refers to the ratio of the initial charging energy and the initial discharging energy of the battery to the battery mass under the specified test conditions and test methods.

[0081] For the convenience of description, as shown in the figure, the first direction is the direction indicated by the arrow of R1, the second direction is the direction indicated by the arrow of R2, and the third direction is the direction indicated by the arrow of R3.

[0082] Exemplarily, the first direction and the second direction are perpendicularly crossed, the second direction and the third direction are perpendicularly crossed, and the first direction and the second direction are perpendicularly crossed.

[0083] In the battery device according to the embodiment of the present application, the first support ear 11, the second support ear 12 and the box body 2 enclose a weight reduction cavity 4. The first support ear 11 and the second support ear 12 make the lifting lug 1 have a hollow structure, and the mass of the lifting lug 1 is small. Correspondingly, the mass of the battery device is small, which is beneficial to improving the mass energy density of the battery device. When the lifting lug 1 is installed on the electrical device, the first support ear 11 and the second support ear 12 are in contact with each other, so that the first support ear 11 and the second support ear 12 can support each other, which is beneficial to improving the strength of the lifting lug 1, thereby taking into account both the mass energy density of the battery device and the strength of the lifting lug 1.

[0084] In one embodiment, please refer to Figures 1 to 4 , the box body 2 includes a bearing box 21 and a box cover 22. The battery cell assembly 3 is installed in the bearing box 21. The first support ear 11 and the second support ear 12 are both connected to the outside of the bearing box 21. The first support ear 11 and the second support ear 12 are connected. The first support ear 11, the second support ear 12 and the bearing box 21 enclose a weight reduction cavity 4. The box cover 22 is covered on the bearing box 21, and the battery cell assembly 3 is located in the space enclosed by the bearing box 21 and the box cover 22.

[0085] That the first support ear 11 and the second support ear 12 are both connected to the outside of the bearing box 21 means on the side of the bearing box 21 facing away from the battery cell assembly 3.

[0086] In the embodiment of the present application, the mutually connected first and second support ears 12 are both arranged on the outside of the bearing box 21. In the state where the first support ear 11 and the second support ear 12 are connected, the box cover 22 can be opened and closed with the bearing box 21, and the opening and closing of the box cover 22 are not restricted by the first support ear 11 and the second support ear 12. The first support ear 11 and the second support ear 12 are both connected to the outside of the bearing box 21, and the connection of the first support ear 11 and the second support ear 12 is not restricted by the box cover 22.

[0087] It can be understood that the first support ear 11 and the second support ear 12 are not limited to being both connected to the outside of the bearing box 21. Exemplarily, the first support ear 11 is connected to the outside of the bearing box 21, and the second support ear 12 is connected to the outside of the box cover 22.

[0088] In one embodiment, please refer to Figures 1 to 4 , the bearing box 21 includes a main box 211 and a flange 212. The battery cell assembly 3 is installed in the main box 211. The first support ear 11 is connected to the outside of the main box 211. The flange 212 surrounds the main box 211. The flange 212 is connected to the side of the main box 211 facing the box cover 22. The box cover 22 is connected to the flange 212. The battery cell assembly 3 is located in the space enclosed by the main box 211, the flange 212 and the box cover 22. The second support ear 12 is connected to the outside of the flange 212. The first support ear 11, the main box 211, the flange 212 and the second support ear 12 enclose a weight reduction cavity 4.

[0089] In the embodiment of the present application, the second support ear 12 is connected to the flanging 212, the box cover 22 is connected to the flanging 212, the second support ear 12 is beneficial to the flanging 212 to better support the box cover 22, the first support ear 11 is connected to the main box 211, and the first support ear 11 on the main box 211 can better support the second support ear 12, and the flanging 212 can increase the strength of the first support ear 11 to a certain extent.

[0090] It can be understood that the second support ear 12 is not limited to being connected to the outside of the flanging 212. Exemplarily, the second support ear 12 is connected to the outside of the main box 211.

[0091] In one embodiment, please refer to Figure 3 , the main box 211, the flanging 212 and the second support ear 12 are integrally formed, the first support ear 11 is independently formed, and the first support ear 11 is respectively connected to the main box 211 and the second support ear 12.

[0092] In the embodiment of the present application, the main box 211, the flanging 212 and the second support ear 12 are integrally formed, which reduces the manufacturing time of the main box 211, the flanging 212 and the second support ear 12. The first support ear 11 is independently formed and then installed, which is convenient for the manufacturing of the first support ear 11 and reduces the special-shaped parts.

[0093] It can be understood that the first support ear 11 is not limited to being independently formed respectively. Exemplarily, the first support ear 11 is integrally formed with the second support ear 12.

[0094] In one embodiment, the first support ear 11 is respectively welded to the main box 211 and the second support ear 12.

[0095] In the embodiment of the present application, the first support ear 11 is respectively welded to the main box 211 and the second support ear 12, so that the first support ear 11 is firmly connected to the main box 211 and the second support ear 12. During the use of the battery device, the welded connection between the first support ear 11 and the main box 211 and the second support ear 12 is less affected by temperature.

[0096] It can be understood that the first support ear 11 is not limited to being welded to the main box 211 and the second support ear 12 respectively. Exemplarily, the first support ear 11 is respectively adhesively bonded to the main box 211 and the second support ear 12.

[0097] In one embodiment, please refer to Figures 1 to 4 , the second support ear 12 connected to the flanging 212 is formed with a first ventilation hole 121, and the first ventilation hole 121 communicates with the weight reduction cavity 4.

[0098] In the embodiment of the present application, the communication between the first ventilation hole 121 and the weight reduction cavity 4 can balance the pressure in the weight reduction cavity 4 and prevent the pressure in the weight reduction cavity 4 from being too high due to temperature changes.

[0099] It is understandable that the battery device may not be provided with the first ventilation hole 121. Exemplarily, the weight reduction cavity 4 is sealed.

[0100] In one embodiment, please refer to Figures 1 to 4 , the second support ear 12 is a sheet metal part, and the second support ear 12 is further formed with a groove 122 recessed toward the weight reduction cavity 4, and the first ventilation hole 121 is formed on the groove wall of the groove 122.

[0101] A sheet metal part refers to a component processed by sheet metal technology. Sheet metal technology is a comprehensive cold working process for metal thin plates, such as shearing, punching, cutting, compounding, folding, riveting and splicing.

[0102] In the embodiment of the present application, the sheet metal part has a small thickness and a light weight. The strength of the sheet metal part can be improved through the concave and convex non-planar surface. The first ventilation hole 121 is formed on the groove wall of the groove 122. The groove 122 increases the ventilation space of the first ventilation hole 121 and reduces the possibility that the first ventilation hole 121 is blocked by the electrical device. The groove 122 is relatively large, and the relatively small first ventilation hole 121 prevents the strength of the second support ear 12 from being reduced.

[0103] It is understandable that the first ventilation hole 121 is not limited to being arranged in the groove 122. Exemplarily, the first ventilation hole 121 and the groove 122 are arranged at intervals.

[0104] In one embodiment, please refer to Figures 1 to 4 , the side of the second support ear 12 facing away from the first support ear 11 is used to install the device body of the electrical device. The main box 211, the flanging 212, the first support ear 11 and the second support ear 12 also enclose a second ventilation hole 5. The second ventilation hole 5 communicates with the weight reduction cavity 4, and the second ventilation hole 5 is located on the side of the second support ear 12 facing the first support ear 11.

[0105] In the embodiment of the present application, the second ventilation hole 5 is located on the side of the second support ear 12 facing the first support ear 11, so that the second ventilation hole 5 avoids the electrical device and reduces the possibility that the second ventilation hole 5 is blocked by the electrical device, which is beneficial to the pressure balance in the weight reduction cavity 4.

[0106] It is understandable that the second ventilation hole 5 is not limited to being located on the side of the second support ear 12 facing the first support ear 11. Exemplarily, the second ventilation hole 5 is not limited to being located on the side of the second support ear 12 facing away from the first support ear 11.

[0107] In one embodiment, please refer to Figures 1 to 4, the lifting lug 1 has a lifting hole 6. The first support lug 11 includes a support body 111 and a support column 112. The support body 111 is connected to the outside of the bearing box 21, and the support column 112 is connected between the support body 111 and the second support lug 12. The lifting hole 6 penetrates through the second support lug 12, the support column 112, and the support body 111. The support body 111, the support column 112, the second support lug 12, and the bearing box 21 enclose a weight-reducing cavity 4.

[0108] The support column 112 is connected between the support body 111 and the second support lug 12 means that the end faces of both ends of the support column 112 are in contact with the second support lug 12 and the support body 111 respectively.

[0109] Exemplarily, the support column 112 is welded to the first support lug 11 and the second support lug 12 respectively.

[0110] In the embodiment of the present application, the screw of the lifting device passes through the lifting hole 6, and the lifting lug 1 is fixedly installed on the device main body of the electrical device by using a nut. The support column 112 is connected between the support body 111 and the second support lug 12 to support the first support lug 11 and the second support lug 12, reducing the force deformation of the first support lug 11 and the second support lug 12. The lifting hole 6 penetrates through the second support lug 12, the support column 112, and the support body 111. The support column 112 has a strengthening effect on the structure near the lifting hole 6, reducing the influence of the lifting hole 6 on the structural strength of the support body 111.

[0111] It can be understood that the first support lug 11 may not be provided with the support column 112.

[0112] It can be understood that the lifting hole 6 is not limited to penetrating through the support column 112. Exemplarily, the lifting hole 6 is arranged at an interval from the support column 112.

[0113] In one embodiment, please refer to Figures 1 to 4 , lifting lugs 1 are correspondingly arranged on opposite sides of the box body 2 along the first direction. At least one battery cell assembly 3 straddles opposite sides of the box body 2 along the first direction, and at least two battery cells 31 in each battery cell assembly 3 are arranged along the first direction.

[0114] In the embodiment of the present application, the battery cell assembly 3 straddles opposite sides of the box body 2 along the first direction, which can reduce the number of battery cell assemblies 3 in the first direction and improve the volume utilization rate of the battery device.

[0115] It can be understood that at least two battery cells 31 in each battery cell assembly 3 are not limited to being arranged along the first direction. Exemplarily, at least two battery cells 31 in each battery cell assembly 3 are not limited to being arranged along the first direction.

[0116] In one embodiment, please refer to Figure 4, the number of battery cell assemblies 3 is at least two, and the at least two battery cell assemblies 3 are arranged along a second direction, which intersects with a first direction.

[0117] Exemplarily, the electrical device is a vehicle, the first direction is the width direction of the vehicle, and the second direction is the length direction of the vehicle.

[0118] In the embodiments of the present application, at least two battery cell assemblies 3 are arranged along the second direction. The width of the electrical device in the first direction is limited. By using the second direction to arrange at least two battery cell assemblies 3, the number of battery cell assemblies 3 is not limited by the width in the first direction, and the battery device can provide more electrical energy for the electrical device. When the electrical device is a vehicle, the width direction of the vehicle is limited, and at least two battery cell assemblies 3 are arranged along the length direction of the vehicle. The width direction of the vehicle does not limit the number of battery cell assemblies 3, and the battery device can provide more electrical energy for the vehicle.

[0119] In one embodiment, please refer to Figure 1 , a charging interface 7 is provided on one side of the box body 2 along the second direction, and the second direction intersects with the first direction.

[0120] In the embodiments of the present application, the charging interface 7 is provided on the box body 2, which is convenient for charging the battery device and is beneficial to the cyclic charging and discharging of the battery device.

[0121] It can be understood that the charging interface 7 may not be provided on the box body 2. Exemplarily, when the power in the battery device is used up, the battery device is replaced.

[0122] In one embodiment, please refer to Figures 1 to 4 , the battery device further includes a positioning pin 8. The number of lifting lugs 1 is at least two, and the second support ears 12 of the at least two lifting lugs 1 are connected with the positioning pin 8, and the positioning pin 8 is used to position the position of the box body 2 relative to the electrical device.

[0123] In the embodiments of the present application, the positioning pin 8 helps to position the position of the box body 2 relative to the electrical device, which is beneficial to installing the battery device on the electrical device and reduces the installation time and difficulty of the battery device.

[0124] In one embodiment, the electrical device is a vehicle, and lifting lugs 1 are correspondingly provided on opposite sides of the box body 2 along the first direction, and the first direction is perpendicular to the forward direction of the vehicle.

[0125] In the embodiments of the present application, lifting lugs 1 are only correspondingly provided on opposite sides of the box body 2 along the first direction, and no lifting lugs 1 are provided on opposite sides of the box body 2 along the second direction. The second direction of the box body 2 does not bear the load of the battery device, and the longitudinal beam for strengthening the load-bearing can be omitted in the second direction of the box body 2, reducing the mass of the battery device and improving the mass energy density of the battery device.

[0126] In one embodiment, both the first support ear 11 and the second support ear 12 are sheet metal parts.

[0127] In one embodiment, the arrangement direction of the carrier box 21 and the box cover 22 is the third direction, and the third direction intersects with the first direction and the second direction respectively, and at least two of the battery cells 31 in each battery cell assembly 3 are arranged along the third direction.

[0128] For the battery device according to the embodiment of the present application, please refer to Figures 1 to 4, the battery cell assembly 3 is installed inside the box body 2. The lifting lug 1 is used to install the device body of the electrical device. The lifting lug 1 includes a first support ear 11 and a second support ear 12 connected to the outside of the box body 2. The first support ear 11 and the second support ear 12 are in contact with each other. The first support ear 11, the second support ear 12 and the box body 2 enclose a weight reduction cavity 4. The battery cell assembly 3 is installed in the carrier box 21. Both the first support ear 11 and the second support ear 12 are connected to the outside of the carrier box 21. The first support ear 11 and the second support ear 12 are connected. The first support ear 11, the second support ear 12 and the carrier box 21 enclose a weight reduction cavity 4. The box cover 22 is covered on the carrier box 21. The battery cell assembly 3 is located in the space enclosed by the carrier box 21 and the box cover 22. The battery cell assembly 3 is installed in the main box 211. The first support ear 11 is connected to the outside of the main box 211. The flange 212 surrounds the main box 211. The flange 212 is connected to the side of the main box 211 facing the box cover 22. The box cover 22 is connected to the flange 212. The battery cell assembly 3 is located in the space enclosed by the main box 211, the flange 212 and the box cover 22. The second support ear 12 is connected to the outside of the flange 212. The first support ear 11, the main box 211, the flange 212 and the second support ear 12 enclose a weight reduction cavity 4. The main box 211, the flange 212 and the second support ear 12 are integrally formed. The first support ear 11 is independently formed. The first support ear 11 is respectively connected to the main box 211 and the second support ear 12. The first support ear 11 is respectively welded to the main box 211 and the second support ear 12. The second support ear 12 connected to the flange 212 is formed with a first ventilation hole 121. The first ventilation hole 121 communicates with the weight reduction cavity 4. The second support ear 12 is a sheet metal part. The second support ear 12 is also formed with a groove 122 recessed towards the weight reduction cavity 4. The first ventilation hole 121 is formed on the wall of the groove 122. The side of the second support ear 12 facing away from the first support ear 11 is used to install the device body of the electrical device. The main box 211, the flange 212, the first support ear 11 and the second support ear 12 also enclose a second ventilation hole 5. The second ventilation hole 5 communicates with the weight reduction cavity 4. The second ventilation hole 5 is located on the side of the second support ear 12 facing the first support ear 11. The first support ear 11 includes a support body 111 and a support column 112. The support body 111 is connected to the outside of the carrier box 21. The support column 112 is connected between the support body 111 and the second support ear 12. The lifting hole 6 penetrates through the second support ear 12, the support column 112 and the support body 111. The support body 111, the support column 112, the second support ear 12 and the carrier box 21 enclose a weight reduction cavity 4. Lifting lugs 1 are correspondingly arranged on the opposite sides of the box body 2 along the first direction. At least one battery cell assembly 3 straddles the opposite sides of the box body 2 along the first direction. At least two battery cells 31 in each battery cell assembly 3 are arranged along the first direction. The number of battery cell assemblies 3 is at least two. At least two battery cell assemblies 3 are arranged along the second direction. The second direction is arranged crosswise with the first direction.A charging interface 7 is provided on one side of the box body 2 along the second direction. The number of lifting lugs 1 is at least two. A positioning pin 8 is connected to the second support lugs 12 of at least two lifting lugs 1. The positioning pin 8 is used to position the position of the box body 2 relative to the electrical device.

[0129] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: A battery cell assembly, comprising at least two battery cells; A box body, wherein the battery cell assembly is installed in the box body; The lifting ear is used to install the device body of the electrical device, and the lifting ear includes a first supporting ear and a second supporting ear connected to the outside of the box body, the first supporting ear and the second supporting ear are in contact with each other, and the first supporting ear, the second supporting ear and the box body are surrounded by a weight reduction cavity.

2. The battery device according to claim 1, wherein The box body comprises: A carrying box, the battery cell assembly is installed in the carrying box, the first supporting ear and the second supporting ear are both connected to the outside of the carrying box, the first supporting ear and the second supporting ear are connected, and the first supporting ear, the second supporting ear and the carrying box are surrounded to form the weight reduction cavity; A box cover is arranged on the carrying box, and the battery monomer assembly is located in a space enclosed by the carrying box and the box cover.

3. The battery device according to claim 2, characterized in that, The carrying box comprises: A main box, the battery monomer assembly is installed on the main box, and the first supporting ear is connected to the outside of the main box; The flange surrounds the main box, the flange is connected to the side of the main box facing the box cover, the box cover is connected to the flange, the battery cell assembly is located in the space enclosed by the main box, the flange and the box cover, the second supporting ear is connected to the outer side of the flange, and the first supporting ear, the main box, the flange and the second supporting ear enclose the weight reduction cavity.

4. The battery device according to claim 3, characterized in that, The main box, the flange and the second supporting ear are integrally formed, the first supporting ear is independently formed, and the first supporting ear is respectively connected to the main box and the second supporting ear.

5. The battery device according to claim 4, characterized in that, The first supporting ear is welded to the main box and the second supporting ear respectively.

6. The battery device according to claim 3, wherein The second supporting ear connected to the flange is formed with a first air vent, and the first air vent is communicated with the weight-reducing cavity.

7. The battery device according to claim 6, wherein The second supporting ear is a sheet metal part, and the second supporting ear is also formed with a groove sunken toward the weight-reducing cavity, and the first air hole is formed on the groove wall of the groove.

8. The battery device according to claim 3, characterized in that, The side of the second supporting ear facing away from the first supporting ear is used for installing the device body of the electrical device, and the main box, the flange, the first supporting ear and the second supporting ear are also surrounded by a second air vent, and the second air vent is connected to the weight reduction cavity. The second air vent is located on the side of the second supporting ear facing the first supporting ear.

9. The battery device according to claim 2, characterized in that, The lifting ear has a lifting hole, and the first supporting ear comprises: A supporting body connected to the outside of the carrying box; The support column is connected between the support body and the second support ear, the lifting hole passes through the second support ear, the support column and the support body, and the support body, the support column, the second support ear and the bearing box are surrounded by the weight reduction cavity.

10. The battery device according to claim 1, characterized in that, The box body is provided with corresponding lifting ears on opposite sides along the first direction, at least one battery cell assembly is arranged across opposite sides of the box body along the first direction, and at least two battery cells in each battery cell assembly are arranged along the first direction.

11. The battery device according to claim 10, characterized in that, The number of the battery cell assemblies is at least two, and at least two of the battery cell assemblies are arranged in a second direction which intersects with the first direction.

12. The battery device according to claim 10, wherein, One side of the box body in the second direction is provided with a charging interface, and the second direction intersects with the first direction.

13. The battery device according to any one of claims 1 to 12, characterized in that, The battery device further includes a positioning pin. The number of the lifting lugs is at least two, and the second support ears of at least two of the lifting lugs are connected with the positioning pin, and the positioning pin is used for positioning the position of the box body relative to the electrical device.

14. An electrical device, characterized in that, Comprising: A device main body; The battery device according to any one of claims 1 to 13, wherein the lifting lug is mounted on the device main body.

15. The electrical device according to claim 14, characterized in that, The electrical device is a vehicle, and the lifting lugs are correspondingly arranged on opposite sides of the box body in the first direction, and the first direction is perpendicular to the advancing direction of the vehicle.

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