Battery devices and electrical equipment

Abstract

This application provides a battery device and an electrical appliance. The battery device includes a battery box and multiple battery cells; the multiple battery cells are arranged to form a battery cell assembly; the battery box is used to house the battery cell assembly, and the battery box includes a cover and a frame. The cover has a cover plate and a first vertical wall, the first vertical wall being connected to one side of the cover plate along a first direction. The frame includes a first beam, the first beam being disposed on one side of the battery cell assembly along the first direction, the first direction being perpendicular to the height direction of the battery device. The first beam includes a first locking part, and the first vertical wall is connected to the first locking part; wherein, the minimum dimension of the first vertical wall along the height direction of the battery device is greater than or equal to the maximum dimension of the first locking part along the height direction of the battery device. The above-mentioned battery device has good space utilization and is more conducive to improving the energy density of the battery device.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development, and improving the space utilization rate of battery devices is a pressing issue that needs to be addressed. Utility Model Content

[0003] One of the objectives of this application is to provide a battery device and an electrical appliance, which aims to solve the technical problem of low space utilization in battery devices in the related art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted in this application embodiment is as follows: a battery device is provided, including: a battery box and multiple battery cells; the multiple battery cells are arranged to form a battery cell assembly; the battery box is used to accommodate the battery cell assembly, the battery box includes a box cover and a frame, the box cover has a cover plate and a first vertical wall, the first vertical wall is connected to one side of the cover plate along a first direction, the frame includes a first beam, the first beam is disposed on one side of the battery cell assembly along the first direction, the first direction is perpendicular to the height direction of the battery device, the first beam includes a first locking part, the first vertical wall is connected to the first locking part; wherein, the minimum dimension of the first vertical wall along the height direction of the battery device is greater than or equal to the maximum dimension of the first locking part along the height direction of the battery device.

[0005] The beneficial effects of the battery device provided in this application embodiment are as follows: By setting the dimension of the first vertical wall along the height direction of the battery device to be greater than or equal to the dimension of the first locking part along the height direction of the battery device, the battery device provided in this application embodiment can reduce the space occupied by the first beam inside the outer envelope structure of the battery device when the outer envelope structure of the battery device is the same or approximately the same. After this space is released, it can be used as the storage space of the battery box to accommodate battery cells or other components set inside the battery device, thereby effectively improving the space utilization rate of the battery device and making it more conducive to improving the energy density of the battery device.

[0006] In some embodiments of this application, the ratio of the dimension of the first locking part along the height direction of the battery device to the dimension of the first vertical wall along the height direction of the battery device is 0.3-1.

[0007] By adopting the above technical solution, the height ratio between the first locking part and the first vertical wall can be controlled within a suitable range. This not only increases the storage space of the battery box, thereby effectively improving the space utilization of the battery device, but also enables the first beam to have good anti-compression performance, thereby effectively improving the anti-compression performance of the battery device. Furthermore, it can reduce the material cost and weight of the first beam, thereby reducing the manufacturing cost of the battery device and increasing the energy density of the battery device.

[0008] In some embodiments of this application, the first beam further includes a first mounting portion, which is disposed on the side of the first locking portion facing away from the battery cell assembly along a first direction, and the first mounting portion is used to connect to an external bracket.

[0009] By adopting the above technical solution, the first beam can not only be used to limit the storage space of the battery box, but also as a mounting beam for the battery device. That is, the first vertical wall can be directly connected to the mounting beam of the battery device, which can save the space for arranging the side beams of the frame, further increasing the storage space of the battery box, thereby further improving the space utilization rate of the battery device.

[0010] In some embodiments of this application, the distance between the first mounting part and the first locking part along the first direction is 10mm-100mm.

[0011] By adopting the above technical solution, the distance between the first mounting part and the first locking part can be controlled within a suitable range, further increasing the battery box's storage space and thus further improving the space utilization rate of the battery device.

[0012] In some embodiments of this application, the first beam further includes a first partition portion, which is disposed between the first locking portion and the first mounting portion.

[0013] By adopting the above technical solution, the first partition can effectively separate the first locking part from the first mounting part, so that the first locking part and the first mounting part are not connected to each other, thereby effectively improving the sealing performance of the battery box.

[0014] In some embodiments of this application, the first partition has a first partition cavity, which is used to separate the first locking part from the first mounting part.

[0015] By adopting the above technical solution, the first locking part and the first mounting part are more effectively separated, thereby further improving the sealing performance of the battery box.

[0016] In some embodiments of this application, the maximum dimension of the first locking portion along the height direction of the battery device is smaller than the maximum dimension of the battery cell along the height direction of the battery device.

[0017] By adopting the above technical solution, not only can the storage space of the battery box be increased, thereby further improving the space utilization rate of the battery device, but the material cost and weight of the first beam can also be reduced, thereby reducing the manufacturing cost of the battery device and increasing the energy density of the battery device.

[0018] In some embodiments of this application, the ratio of the maximum dimension of the first locking portion along the height direction of the battery device to the maximum dimension of the battery cell along the height direction of the battery device is 0.2-0.5.

[0019] By adopting the above technical solution, the height ratio between the first locking part and the battery cell can be controlled within a suitable range. This not only increases the storage space of the battery box, thereby effectively improving the space utilization of the battery device, but also enables the first beam to have good anti-compression performance, thereby effectively improving the anti-compression performance of the battery device. Furthermore, it can reduce the material cost and weight of the first beam, thereby reducing the manufacturing cost of the battery device and increasing the energy density of the battery device.

[0020] In some embodiments of this application, the side of the first upright wall facing the battery cell assembly is flush with the side of the first locking part facing the battery cell assembly.

[0021] By adopting the above technical solution, the storage space of the battery box is further increased, thereby further improving the space utilization rate of the battery device.

[0022] In some embodiments of this application, the first beam has a plurality of first cavities, and each first cavity is arranged sequentially along a straight line parallel to the first direction.

[0023] By adopting the above technical solution, the height of the first beam can be further reduced, the storage space of the battery box can be further increased, and the space utilization rate of the battery device can be further improved.

[0024] In some embodiments of this application, the first beam further includes a first protrusion, which is connected to the first locking portion and protrudes from the first locking portion toward the direction of the battery cell assembly.

[0025] By adopting the above technical solution, the first protrusion can compensate for the strength loss of the first beam after the height decreases, thereby enabling the first beam to have good anti-compression performance, and thus enabling the battery box to have good anti-compression performance.

[0026] In some embodiments of this application, the first protrusion is used to support at least a portion of the battery cell assembly.

[0027] By adopting the above technical solution, not only can the frame bear at least part of the weight of the battery cell assembly, thereby improving the overall structural strength of the battery device, but it can also reduce the space occupied by the first protrusion on the battery cell assembly, thereby further improving the space utilization of the battery device and making it more conducive to improving the energy density of the battery device.

[0028] In some embodiments of this application, the frame further includes a second beam disposed on the side of the battery cell assembly facing away from the first beam in a first direction. The second beam includes a main body and a second protrusion. The cover is connected to the main body on the side away from the first wall in a first direction. The second protrusion is connected to the main body and protrudes from the main body toward the direction close to the battery cell assembly.

[0029] By adopting the above technical solution, the second protrusion can improve the structural strength of the second beam to a certain extent. While keeping the structural strength of the second beam roughly unchanged, the height of the second beam can be reduced and the height of the cover away from the first wall along the first direction can be increased. In this way, when the outer envelope structure of the battery device is the same or roughly the same, the space occupied by the second beam inside the outer envelope structure of the battery device can be reduced. After this space is released, it can be used as the storage space of the battery box to accommodate battery cells or other components set inside the battery device, thereby further improving the space utilization of the battery device and making it more conducive to improving the energy density of the battery device.

[0030] In some embodiments of this application, the second protrusion is used to support at least a portion of the battery cell assembly.

[0031] By adopting the above technical solution, not only can the frame bear at least part of the weight of the battery cell assembly, thereby improving the overall structural strength of the battery device, but it can also reduce the space occupied by the second protrusion on the battery cell assembly, thereby further improving the space utilization of the battery device and making it more conducive to improving the energy density of the battery device.

[0032] In some embodiments of this application, the battery box further includes a tray connected between the first protrusion and the second protrusion, and the tray is used to support the battery cell assembly.

[0033] By adopting the above technical solution, the battery cell assembly is effectively supported, thereby improving the structural strength of the battery device.

[0034] In some embodiments of this application, the battery device further includes a control component electrically connected to the battery cell assembly, and the tray further includes a first plate and a second plate, the first plate being used to support the battery cell assembly and the second plate being used to support the control component.

[0035] By adopting the above technical solution, the structural strength of the first plate and the structural strength of the second plate can be designed independently, which not only meets the overall strength requirements of the tray, but also reduces the manufacturing cost of the tray, thereby effectively reducing the manufacturing cost of the battery device.

[0036] In some embodiments of this application, the frame further includes a third beam connected between the first beam and the second beam to divide the internal space of the battery device into a first accommodating space for accommodating a battery cell assembly and a second accommodating space for accommodating a control assembly. A first plate covers the opening side of the first accommodating space opposite to the box cover, and a second plate covers the opening side of the second accommodating space opposite to the box cover. Both the first plate and the second plate are connected to the third beam.

[0037] By adopting the above technical solution, not only can the opening side of the first accommodating space facing away from the box cover and the opening side of the second accommodating space facing away from the box cover be effectively sealed, but the connection strength between the tray and the frame is also effectively improved, thereby effectively improving the structural strength of the battery device.

[0038] In some embodiments of this application, the first plate has heat exchange channels for circulating heat exchange medium.

[0039] By adopting the above technical solution, the heat exchange medium can exchange heat with the battery cell assembly during the flow of the heat exchange channel, so as to regulate the temperature of the battery cell assembly. That is, the heat exchange structure of the battery cell assembly is integrated on the first plate, making the structure of the battery device more compact and thus further improving the space utilization of the battery device.

[0040] In some embodiments of this application, the battery box further includes a bottom protective plate, which is connected between the first locking part and the main body part.

[0041] By adopting the above technical solutions, the battery cells are effectively protected, thereby improving the reliability of the battery device.

[0042] In some embodiments of this application, the first wall includes a first wall body and a first flange. The first wall body is connected to one side of the cover plate along a first direction, and the first flange is connected to the side of the first wall body away from the cover plate. The first flange protrudes from the first wall body in a direction away from the battery cell assembly, and the first flange is connected to the first locking part.

[0043] By adopting the above technical solution, the outer side of the battery device's outer envelope structure can have sufficient space to avoid external components, effectively reducing the risk of interference between the battery device and external components, and further improving the space utilization rate of the battery device.

[0044] In some embodiments of this application, the two ends of the first locking portion along the second direction are closed ends, and the second direction is perpendicular to the first direction and the height direction of the battery device.

[0045] By adopting the above technical solution, the internal environment of the battery box is effectively isolated from the external environment, thereby effectively improving the sealing performance of the battery device.

[0046] In some embodiments of this application, the frame further includes a fourth beam and a fifth beam, which are respectively disposed on opposite sides of the battery cell assembly along the second direction. The fourth beam closes one end of the first locking part along the second direction, and the fifth beam closes the other end of the first locking part along the second direction.

[0047] By adopting the above technical solution, it is easy to close both ends of the first locking part along the second direction. The structure is simple and easy to implement.

[0048] In some embodiments of this application, the battery device further includes a first sealing member and a second sealing member, wherein the first sealing member closes one end of the first locking portion along the second direction, and the second sealing member closes the other end of the first locking portion along the second direction.

[0049] By adopting the above technical solution, the two ends of the first locking part along the second direction are effectively sealed, thereby effectively improving the sealing performance of the battery device.

[0050] In some embodiments of this application, the first locking part is located within the projection range of the cover along the height direction of the battery device.

[0051] By adopting the above technical solution, the space occupied by the first beam inside the outer envelope structure of the battery device can be reduced, thereby effectively improving the space utilization rate of the battery device and making it more conducive to improving the energy density of the battery device.

[0052] In some embodiments of this application, the battery box further includes a first locking attachment for connecting the first vertical wall and the first locking part, the first locking part being located within the projection range of the first locking attachment along the height direction of the battery device.

[0053] By adopting the above technical solution, the space occupied by the first beam inside the outer envelope structure of the battery device can be reduced, thereby effectively improving the space utilization rate of the battery device and making it more conducive to improving the energy density of the battery device.

[0054] Secondly, embodiments of this application also provide an electrical device, including the battery device described in any of the above embodiments.

[0055] The electrical equipment provided in this application embodiment has at least the following beneficial effects: the electrical equipment provided in this application embodiment effectively improves the space utilization rate of the electrical equipment by adopting the battery device described in any of the above embodiments. Attached Figure Description

[0056] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies 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 these drawings without creative effort.

[0057] Figure 1 This is a schematic diagram of the vehicle structure provided in an embodiment of this application;

[0058] Figure 2 This is a schematic diagram of the structure of the battery device provided in the embodiments of this application;

[0059] Figure 3 for Figure 2 The diagram shows the exploded structure of the battery device.

[0060] Figure 4 for Figure 2 A top view of the battery device shown.

[0061] Figure 5 for Figure 4 The diagram shows a cross-sectional view of the battery device along line AA.

[0062] Figure 6 for Figure 5 A magnified structural diagram of the battery device at point C shown;

[0063] Figure 7 for Figure 5 A magnified structural diagram of the battery device at point D shown;

[0064] Figure 8 for Figure 4 The diagram shows a cross-sectional view of the battery device along the BB line.

[0065] Figure 9 for Figure 8 An enlarged structural diagram of the battery device at point E is shown.

[0066] Figure 10 This is a schematic diagram of the structure of a battery device in related technologies.

[0067] The following are the labeling elements in the figure:

[0068] 1. Battery box; 2. Frame; 3. Side beams; 4. Mounting beams; 5. Box cover; 6. Individual battery cells;

[0069] 1000, vehicles;

[0070] 100. Battery assembly; 10. Battery box; 11. Box cover; 111. Cover plate; 112. First vertical wall; 1121. First wall body; 1122. First flange; 113. Second vertical wall; 1131. Second wall body; 1132. Second flange; 12. Frame; 121. First beam; 1211. First locking part; 1212. First mounting part; 1213. First partition part; 12131. First partition cavity; 1214. First protrusion; 1215. First cavity; 122. Second beam; 1221. Main body; 12211. Second locking part; 12212. Second mounting part; 12213. Second partition part; 1222. Second protrusion part; 123. Third beam; 124. Fourth beam; 125. Fifth beam; 13. Support plate; 131. First plate; 132. Second plate; 14. Bottom guard plate; 15. First receiving space; 16. Second receiving space; 17. First locking accessory; 18. Second locking accessory; 20. Battery cell;

[0071] 200. Controller;

[0072] 300. Motor. Detailed Implementation

[0073] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0074] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are for ease of description only, not to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0075] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of the various components shown in the accompanying drawings in the embodiments of this application are merely illustrative and should not constitute any limitation on this application.

[0076] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0077] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0078] Unless otherwise specified, all steps of this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order; for example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0079] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery applications, market demand is also constantly increasing, placing higher demands on the space utilization rate of battery devices.

[0080] Please see Figure 10 A battery device typically includes a battery case 1 and multiple battery cells 6, which are arranged to form a battery cell assembly. The battery case 1 houses the battery cell assembly. The battery case 1 typically includes a frame 2 and a cover 5. The frame 2 typically includes side beams 3 and mounting beams 4. The side beams 3 are located on one side of the battery cell assembly along the width direction of the battery device. The cover 5 is connected to the top of the side beams 3 along the width direction of the battery device. The mounting beams 4 are connected to the side of the side beams 3 facing away from the battery cell assembly and are used to connect to an external bracket to mount the battery device onto the external bracket. The outer surface of the cover 5, the outer surface of the side beams 3 facing away from the battery cell assembly, and the outer surface of the mounting beams 4 constitute part of the outer envelope structure of the battery device.

[0081] In related technologies, the height of the side beam 3 is usually greater than, equal to or slightly less than the height of the battery cell 6, while the height of the cover 5 along the width direction of the battery device is usually much less than the height of the side beam 3. This results in the side beam 3 occupying a large portion of the inner space of the outer envelope structure of the battery device. The space occupied by the side beam 3 cannot be utilized by the battery cell 6 or other components located inside the battery box 1, leading to a decrease in the space utilization rate of the battery device and hindering the improvement of the energy density of the battery device.

[0082] Based on the above considerations, in order to improve the space utilization of the battery device, the battery device provided in this application embodiment sets the dimension of the first vertical wall along the height direction of the battery device to be greater than or equal to the dimension of the first locking part along the height direction of the battery device. Under the condition that the outer envelope structure of the battery device is the same or approximately the same, the space occupied by the first beam inside the outer envelope structure of the battery device can be reduced. After this part of the space is released, it can be used as the storage space of the battery box to accommodate battery cells or other components set inside the battery device, thereby effectively improving the space utilization of the battery device and making it more conducive to improving the energy density of the battery device.

[0083] The battery device disclosed in this application can be used in electrical devices that use a battery device as a power source. These electrical devices can be, but are not limited to, vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles. Spacecraft can be airplanes, rockets, space shuttles, or spacecraft. Electric toys can be stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Power tools can be 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.

[0084] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0085] Please see Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 1000 provided in an embodiment of this application. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 may be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power requirements of the vehicle 1000 during starting, navigation, and driving.

[0086] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0087] The technical solutions provided in the embodiments of this application will be described below with reference to the accompanying drawings.

[0088] Firstly, please refer to the following: Figures 2 to 6 This application provides a battery device 100, including: a battery box 10 and a plurality of battery cells 20; the plurality of battery cells 20 are arranged to form a battery cell assembly; the battery box 10 is used to accommodate the battery cell assembly, the battery box 10 includes a box cover 11 and a frame 12, the box cover 11 has a cover plate 111 and a first vertical wall 112, the first vertical wall 112 is connected to one side of the cover plate 111 along a first direction, the frame 12 includes a first beam 121, the first beam 121 is disposed on one side of the battery cell assembly along the first direction, the first direction is perpendicular to the height direction of the battery device 100, the first beam 121 includes a first locking part 1211, the first vertical wall 112 is connected to the first locking part 1211; wherein, the minimum dimension H1 of the first vertical wall 112 along the height direction of the battery device 100 is greater than or equal to the maximum dimension H2 of the first locking part 1211 along the height direction of the battery device 100.

[0089] The battery device 100 mentioned in the embodiments of this application has a height direction. The height direction of the battery device 100 refers to the direction perpendicular to the mounting plane of the battery device 100 when the battery device 100 is in use (e.g., when the battery device 100 is assembled to an electrical device), or the direction perpendicular to the support plane of the battery device 100 when the battery device 100 is not in use (e.g., when the battery device 100 is stored in a warehouse). As an example, the height direction of the battery device 100 is perpendicular to the aforementioned cover plate 111. As an example, the height direction of the battery device 100 is as follows: Figure 2 and Figure 3The Z direction is shown. The first direction can be any direction perpendicular to the height direction of the battery device 100. As an example, the outer periphery of the battery device 100 is approximately rectangular, and the first direction can be the width direction of the battery device 100 or the length direction of the battery device 100. As an example, the first direction is as shown... Figure 2 and Figure 3 Y direction shown.

[0090] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells 20, which are connected in series, parallel, or mixed connections via a busbar.

[0091] In this embodiment of the application, the battery cell 20 can be a secondary battery, which refers to a battery cell 20 that can be used again after being discharged by recharging to activate the active materials.

[0092] The battery cell 20 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0093] In some embodiments, the battery cell assembly is typically formed by arranging a plurality of battery cells 20.

[0094] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into a single module. As an example, the battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0095] In some embodiments, the battery device 100 may be a battery pack, which includes a battery case 10 and one or more battery cell assemblies, the battery cell assemblies being housed in the battery case 10.

[0096] As an example, the battery cell assembly can be a battery module, which can be housed in the battery case 10 by fixing the battery module in the battery case 10.

[0097] As an example, the battery cell assembly can also be housed in the battery case 10 by directly fixing multiple battery cells 20 to the battery case 10.

[0098] As an example, the battery box 10 may include a first box and a second box. The first box and the second box are fastened together to form a closed space inside the battery box 10 to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed.

[0099] As an example, the battery box 10 includes a cover 11, a frame 12, and a bottom protective plate 14. The cover 11 and the bottom protective plate 14 are respectively connected to the frame 12, so that the interior of the battery box 10 forms a closed space to accommodate individual battery cells. The cover 11 constitutes the first box described above, and the frame 12 and the bottom protective plate 14 constitute the second box described above.

[0100] In some embodiments, the battery box 10 may be part of the chassis structure of the vehicle 1000. For example, a portion of the battery box 10 may be at least a portion of the floor of the vehicle 1000, or a portion of the battery box 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0101] The cover plate 111 is the main body portion 1221 of the cover 11. The cover plate 111 and the bottom protective plate 14 are arranged facing each other along the height direction of the battery device 100. As an example, the cover plate 111 and the bottom protective plate 14 are arranged parallel to each other. The cover plate 111 is used to define the top boundary of the internal environment of the battery device 100, and the bottom protective plate 14 is used to define the bottom boundary of the internal environment of the battery device 100.

[0102] The first vertical wall 112 is connected to one side of the cover plate 111 along the first direction. The first vertical wall 112 and the cover plate 111 can be integrally formed components. For example, the first vertical wall 112 and the cover plate 111 are formed into a whole by stamping. Alternatively, the first vertical wall 112 and the cover plate 111 can be formed separately and then connected to form a whole. For example, the first vertical wall 112 and the cover plate 111 are welded together to form a whole.

[0103] The frame 12 defines the circumferential boundary of the internal environment of the battery device 100. The outer surfaces of the cover 11, the bottom guard plate 14, and the outer surfaces of the frame 12 located outside the coverage area of ​​the cover 11 and the bottom guard plate 14 cooperate to form the outer envelope structure of the battery device 100. The first beam 121 and the first vertical wall 112 cooperate to define one side boundary of the internal environment of the battery device 100 along a first direction. The first locking part 1211 is the part of the first beam 121 used to connect to the first vertical wall 112. As an example, the first vertical wall 112 is connected to the first locking part 1211 on the side facing away from the bottom guard plate 14 along the height direction of the battery device 100.

[0104] In some embodiments, the battery device 100 further includes a first locking attachment 17 for connecting the first upright wall 112 and the first locking part 1211 to lock the first upright wall 112 onto the first locking part 1211. The first locking attachment 17 may be, but is not limited to, bolts, screws, rivets, etc.

[0105] As an example, the first locking part 1211 is located within the projection range of the cover 11 along the height direction of the battery device 100. That is, at least a portion of the first beam 121 within the projection range of the cover 11 along the height direction of the battery device 100 constitutes the first locking part 1211. Alternatively, the first locking part 1211 may be constituted by the entire portion of the first beam 121 within the projection range of the cover 11 along the height direction of the battery device 100, or it may be constituted by a portion of the first beam 121 within the projection range of the cover 11 along the height direction of the battery device 100.

[0106] As an example, the first locking attachment 1211 is located within the projection range of the first locking attachment 17 along the height direction of the battery device 100. That is, the portion of the first beam 121 located within the projection range of the first locking attachment 17 along the height direction of the battery device 100 constitutes the first locking attachment 1211.

[0107] Of course, in other embodiments, the first upright wall 112 and the first locking part 1211 can also be connected in other ways, such as welding, bonding, etc., and this application embodiment is not limited in this regard.

[0108] The minimum dimension H1 of the first vertical wall 112 along the height direction of the battery device 100 refers to the shortest distance between the highest point of the first vertical wall 112 on the side closest to the first beam 121 and the lowest point of the first vertical wall 112 on the side furthest from the first beam 121 in the height direction of the battery device 100. The maximum dimension H2 of the first locking part 1211 along the height direction of the battery device 100 refers to the shortest distance between the highest point of the first locking part 1211 on the side closest to the first vertical wall 112 and the lowest point of the first locking part 1211 on the side furthest from the first vertical wall 112 in the height direction of the battery device 100. The minimum dimension H1 of the first vertical wall 112 along the height direction of the battery device 100 can be greater than or equal to the maximum dimension H2 of the first locking part 1211 along the height direction of the battery device 100.

[0109] In the battery device 100 provided in this application embodiment, the first vertical wall 112 can adopt a thin-wall design, that is, the thickness of the first vertical wall 112 is small. The first locking part 1211 needs to provide locking space for the first vertical wall 112. Therefore, the dimension of the first locking part 1211 along the first direction is greater than the thickness of the first vertical wall 112. By limiting the minimum dimension H1 of the first vertical wall 112 along the height direction of the battery device 100 to be greater than or equal to the maximum dimension H2 of the first locking part 1211 along the height direction of the battery device 100, when the outer envelope structure of the battery device 100 is the same or approximately the same, the space occupied by the first beam 121 located inside the outer envelope structure of the battery device 100 can be reduced. After this part of the space is released, it can be used as the receiving space of the battery box 10 to receive the battery cell 20 or other components disposed inside the battery device 100, thereby effectively improving the space utilization rate of the battery device 100 and making it more conducive to improving the energy density of the battery device 100.

[0110] In some embodiments of this application, please refer to Figure 6 The ratio of the dimension H1 of the first locking part 1211 along the height direction of the battery device 100 to the dimension H2 of the first vertical wall 112 along the height direction of the battery device 100 is 0.3-1.

[0111] The ratio of the dimension H1 of the first locking part 1211 along the height direction of the battery device 100 to the dimension H2 of the first vertical wall 112 along the height direction of the battery device 100 can be determined according to actual application needs, and can be 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, etc.

[0112] By adopting the above technical solution, the height ratio between the first locking part 1211 and the first vertical wall 112 can be controlled within a suitable range. This not only increases the storage space of the battery box 10, thereby effectively improving the space utilization of the battery device 100, but also enables the first beam 121 to have good anti-compression performance, thereby effectively improving the anti-compression performance of the battery device 100. It can also reduce the material cost and weight of the first beam 121, thereby reducing the manufacturing cost of the battery device 100 and increasing the energy density of the battery device 100.

[0113] In some embodiments of this application, please refer to Figure 6 The first beam 121 also includes a first mounting part 1212, which is disposed on the side of the first locking part 1211 facing away from the battery cell assembly in the first direction. The first mounting part 1212 is used to connect to an external bracket.

[0114] The first mounting part 1212 is used to connect to an external bracket to mount the battery device 100 on the external bracket. The external bracket can be the frame of the vehicle 1000 or other brackets used to support the battery device 100.

[0115] In this embodiment, the first beam 121 is a mounting beam, and the first vertical wall 112 is directly connected to the mounting beam. The mounting beam is directly used to define one side boundary of the internal environment of the battery device 100 along the first direction.

[0116] In some embodiments, the first mounting portion 1212 is flush with the first locking portion 1211 along the height direction of the battery device 100 on opposite sides of the battery device 100.

[0117] As an example, the side of the first mounting part 1212 facing away from the bottom cover plate 14 along the height direction of the battery device 100 is flush with the side of the first locking part 1211 facing away from the bottom cover plate 14 along the height direction of the battery device 100. That is, the side of the first mounting part 1212 facing away from the bottom cover plate 14 along the height direction of the battery device 100 and the side of the first locking part 1211 facing away from the bottom cover plate 14 along the height direction of the battery device 100 are on the same plane perpendicular to the height direction of the battery device 100.

[0118] By adopting the above technical solution, the first beam 121 can not only be used to limit the storage space of the battery box 10, but also as a mounting beam for the battery device 100. That is, the first vertical wall 112 can be directly connected to the mounting beam of the battery device 100. This can save the arrangement space of the side beam of the frame 12, further increase the storage space of the battery box 10, and thus further improve the space utilization of the battery device 100.

[0119] In some embodiments of this application, please refer to Figure 6 The distance L between the first mounting part 1212 and the first locking part 1211 along the first direction is 10mm-100mm.

[0120] The distance L between the first mounting part 1212 and the first locking part 1211 along the first direction refers to the distance along the first direction between the side of the first mounting part 1212 near the first locking part 1211 and the side of the first locking part 1211 near the first mounting part 1212.

[0121] The distance L between the first mounting part 1212 and the first locking part 1211 along the first direction can be determined according to actual application needs, and can be 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, etc.

[0122] By adopting the above technical solution, the distance between the first mounting part 1212 and the first locking part 1211 can be controlled within a suitable range, further increasing the storage space of the battery box 10, thereby further improving the space utilization rate of the battery device 100.

[0123] In some embodiments of this application, please refer to Figure 6 The first beam 121 also includes a first partition 1213, which is disposed between the first locking part 1211 and the first mounting part 1212.

[0124] The first partition 1213 is used to separate the first locking part 1211 from the first mounting part 1212 so that the first locking part 1211 and the first mounting part 1212 are not connected to each other.

[0125] In some embodiments, the first mounting portion 1212, the first locking portion 1211, and the first partition portion 1213 are arranged flush with each other on opposite sides of the battery device 100 along the height direction.

[0126] As an example, the first mounting part 1212, the first locking part 1211, and the first partition part 1213 are arranged flush with each other along the height direction of the battery device 100, facing away from the bottom cover plate 14. That is, the first mounting part 1212, the first locking part 1211, and the first partition part 1213 are all on the same plane perpendicular to the height direction of the battery device 100.

[0127] By adopting the above technical solution, the first partition 1213 can effectively separate the first locking part 1211 from the first mounting part 1212, so that the first locking part 1211 and the first mounting part 1212 are not connected to each other, thereby effectively improving the sealing performance of the battery box 10.

[0128] In some embodiments of this application, please refer to Figure 6 The first partition 1213 has a first partition cavity 12131, which is used to separate the first locking part 1211 from the first mounting part 1212.

[0129] The first partition 1213 may have one first partition cavity 12131 or multiple first partition cavities 12131. As an example, when the first partition 1213 has multiple first partition cavities 12131, the multiple first partition cavities 12131 are arranged sequentially along the first direction.

[0130] By adopting the above technical solution, the first locking part 1211 and the first mounting part 1212 are separated more effectively, thereby further improving the sealing performance of the battery box 10.

[0131] In some embodiments of this application, please refer to Figure 6 The maximum dimension H2 of the first locking part 1211 along the height direction of the battery device 100 is smaller than the maximum dimension H3 of the battery cell 20 along the height direction of the battery device 100.

[0132] The maximum dimension H3 of the battery cell 20 along the height direction of the battery device 100 refers to the shortest distance between the highest position of the battery cell 20 on the side closest to the cover plate 111 and the lowest position of the battery cell 20 on the side furthest from the cover plate 111 in the height direction of the battery device 100.

[0133] By adopting the above technical solution, not only can the storage space of the battery box 10 be increased, thereby further improving the space utilization rate of the battery device 100, but the material cost and weight of the first beam 121 can also be reduced, thereby reducing the manufacturing cost of the battery device 100 and increasing the energy density of the battery device 100.

[0134] In some embodiments of this application, please refer to Figure 6 The ratio of the maximum dimension H2 of the first locking part 1211 along the height direction of the battery device 100 to the maximum dimension H3 of the battery cell 20 along the height direction of the battery device 100 is 0.2-0.5.

[0135] The ratio of the maximum dimension H2 of the first locking part 1211 along the height direction of the battery device 100 to the maximum dimension H3 of the battery cell 20 along the height direction of the battery device 100 can be determined according to the actual application needs, and can be 0.2, 0.3, 0.4, 0.5, etc.

[0136] By adopting the above technical solution, the height ratio between the first locking part 1211 and the battery cell 20 can be controlled within a suitable range. This not only increases the storage space of the battery box 10, thereby effectively improving the space utilization of the battery device 100, but also enables the first beam 121 to have good anti-compression performance, thereby effectively improving the anti-compression performance of the battery device 100. It can also reduce the material cost and weight of the first beam 121, thereby reducing the manufacturing cost of the battery device 100 and increasing the energy density of the battery device 100.

[0137] In some embodiments of this application, please refer to Figure 6 The side of the first vertical wall 112 facing the battery cell assembly is flush with the side of the first locking part 1211 facing the battery cell assembly.

[0138] In other words, the side of the first vertical wall 112 facing the battery cell assembly and the side of the first locking part 1211 facing the battery cell assembly are on the same plane. This plane can be parallel to the height direction of the battery device 100 or inclined relative to the height direction of the battery device 100.

[0139] By adopting the above technical solution, the storage space of the battery box 10 is further increased, thereby further improving the space utilization rate of the battery device 100.

[0140] In some embodiments of this application, please refer to Figure 6 The first beam 121 has multiple first cavities 1215, and each first cavity 1215 is arranged sequentially along a straight line parallel to the first direction.

[0141] In some embodiments, the first beam 121 includes a first locking portion 1211, a first mounting portion 1212, and a first partition portion 1213. The first locking portion 1211, the first partition portion 1213, and the first mounting portion 1212 are arranged sequentially along a first direction. The first locking portion 1211, the first mounting portion 1212, and the first partition portion 1213, located at the midpoint of the height direction of the battery device 100, respectively constitute at least a portion of the space of the first cavity 1215. The space of the first cavity 1215 of the first partition portion 1213 constitutes the aforementioned first partition cavity 12131.

[0142] By adopting the above technical solution, the height of the first beam 121 can be further reduced, the storage space of the battery box 10 can be further increased, and the space utilization rate of the battery device 100 can be further improved.

[0143] In some embodiments of this application, please refer to Figure 6 The first beam 121 also includes a first protrusion 1214, which is connected to the first locking part 1211 and protrudes from the first locking part 1211 toward the direction of the battery cell assembly.

[0144] In some embodiments, the first protrusion 1214 has a plate-like structure. As an example, the first protrusion 1214 has a solid plate-like structure. As an example, the first protrusion 1214 has a hollow plate-like structure.

[0145] In some embodiments, the first protrusion 1214 extends along the length of the first beam 121. As an example, the first protrusion 1214 extends from one end of the first beam 121 to the other end of the first beam 121.

[0146] In some embodiments, the first protrusion 1214 is disposed on the side of the first beam 121 away from the cover 11 along the height direction of the battery device 100.

[0147] Of course, in other embodiments, the first protrusion 1214 may also be disposed on the side of the first beam 121 near the cover 11 along the height direction of the battery device 100 or in the middle of the first beam 121 along the height direction of the battery device 100.

[0148] By adopting the above technical solution, the first protrusion 1214 can compensate for the strength loss of the first beam 121 after the height decreases, thereby enabling the first beam 121 to have good anti-compression performance, and thus enabling the battery box 10 to have good anti-compression performance.

[0149] In some embodiments of this application, please refer to Figure 6 The first protrusion 1214 is used to support at least a portion of the battery cell assembly.

[0150] In some embodiments, the cluster of battery cells closest to the first beam 121 in the battery cell assembly is supported on the first protrusion 1214.

[0151] Of course, in other embodiments, multiple battery cell clusters near the first beam 121 in the battery cell assembly may be supported on the first protrusion 1214.

[0152] By adopting the above technical solution, not only can the frame 12 bear at least part of the weight of the battery cell assembly, thereby improving the overall structural strength of the battery device 100, but it can also reduce the space occupied by the first protrusion 1214 in the battery cell assembly, thereby further improving the space utilization of the battery device 100 and making it more conducive to improving the energy density of the battery device 100.

[0153] In some embodiments of this application, please refer to Figure 7 The frame 12 also includes a second beam 122 disposed on the side of the battery cell assembly facing away from the first beam 121 along the first direction. The second beam 122 includes a main body 1221 and a second protrusion 1222. The cover 11 is connected to the main body 1221 along the side away from the first wall 112 along the first direction. The second protrusion 1222 is connected to the main body 1221 and protrudes from the main body 1221 toward the direction close to the battery cell assembly.

[0154] In some embodiments, the cover 11 further includes a second vertical wall 113, which is connected to the side of the cover plate 111 away from the first vertical wall 112 along a first direction, and is connected to the main body 1221. The first beam 121 cooperates with the first vertical wall 112 to define one boundary of the internal environment of the battery device 100 along the first direction, and the second beam 122 cooperates with the second vertical wall 113 to define the other boundary of the internal environment of the battery device 100 along the first direction.

[0155] The main body 1221 is the main body 1221 position of the second beam 122. As an example, the main body 1221 may include a second locking part 12211 and a second mounting part 12212. The second locking part 12211 is the part of the second beam 122 for connecting to the second vertical wall 113. The second vertical wall 113 may be connected to the side of the second locking part 12211 facing away from the bottom guard plate 14 along the height direction of the battery device 100. The second mounting part 12212 is disposed on the side of the second locking part 12211 facing away from the first beam 121 along the first direction. Both the first mounting part 1212 and the second mounting part 12212 are used to connect to the external bracket to mount the battery device 100 on the external bracket. In other words, the first beam 121 and the second beam 122 are both mounting beams. The first vertical wall 112 and the second vertical wall 113 are directly connected to the corresponding mounting beams. The two mounting beams are directly used to define the two side boundaries of the internal environment of the battery device 100 along the first direction.

[0156] As an example, the second vertical wall 113 includes a second wall body 1131 and a second flange 1132. The second wall body 1131 is connected to the side of the cover plate 111 away from the first vertical wall 112 in a first direction. The second flange 1132 is connected to the side of the second wall body 1131 away from the cover plate 111. The second flange 1132 protrudes from the second wall body 1131 in a direction away from the battery cell assembly. The second flange 1132 is connected to the second locking part 12211.

[0157] As an example, the battery device 100 also includes a second locking attachment 18 for connecting the second upright wall 113 and the second locking part 12211. For example, the second flange 1132 and the second locking part 12211 are connected by the second locking attachment 18 to lock the second upright wall 113 onto the second locking part 12211. The second locking attachment 18 can be, but is not limited to, bolts, screws, rivets, etc.

[0158] As an example, the second locking part 12211 is located within the projection range of the cover 11 along the height direction of the battery device 100. That is, at least a portion of the second beam 122 within the projection range of the cover 11 along the height direction of the battery device 100 constitutes the second locking part 12211. Alternatively, the second locking part 12211 may be constituted by all portions of the second beam 122 within the projection range of the cover 11 along the height direction of the battery device 100, or it may be constituted by a portion of the second beam 122 within the projection range of the cover 11 along the height direction of the battery device 100.

[0159] As an example, the second locking attachment 12211 is located within the projection range of the second locking attachment 18 along the height direction of the battery device 100. That is, the portion of the second beam 122 located within the projection range of the second locking attachment 18 along the height direction of the battery device 100 constitutes the second locking attachment 12211.

[0160] Of course, in other embodiments, the second vertical wall 113 and the second locking part 12211 can also be connected in other ways, such as welding, bonding, etc., and this application embodiment is not limited in this regard.

[0161] As an example, the main body 1221 also includes a second partition 12213, which is disposed between the second locking part 12211 and the second mounting part 12212. The second partition 12213 is used to separate the second locking part 12211 from the second mounting part 12212, so that the second locking part 12211 and the second mounting part 12212 are not in communication with each other.

[0162] In some embodiments, the second protrusion 1222 has a plate-like structure. As an example, the second protrusion 1222 has a solid plate-like structure. As an example, the second protrusion 1222 has a hollow plate-like structure.

[0163] In some embodiments, the second protrusion 1222 extends along the length of the second beam 122. As an example, the second protrusion 1222 extends from one end of the second beam 122 to the other end of the second beam 122.

[0164] In some embodiments, the second protrusion 1222 is disposed on the side of the second beam 122 away from the cover 11 along the height direction of the battery device 100.

[0165] Of course, in other embodiments, the second protrusion 1222 may also be disposed on the side of the second beam 122 near the cover 11 along the height direction of the battery device 100 or in the middle of the second beam 122 along the height direction of the battery device 100.

[0166] In some embodiments, the structure of the second beam 122 is the same as that of the first beam 121.

[0167] By adopting the above technical solution, the second protrusion 1222 can improve the structural strength of the second beam 122 to a certain extent. While keeping the structural strength of the second beam 122 roughly unchanged, the height of the second beam 122 can be reduced and the height of the cover 11 on the side away from the first vertical wall 112 along the first direction can be increased. In this way, when the outer envelope structure of the battery device 100 is the same or roughly the same, the space occupied by the second beam 122 inside the outer envelope structure of the battery device 100 can be reduced. After this space is released, it can be used as the housing space of the battery box 10 to accommodate the battery cell 20 or other components set inside the battery device 100, thereby further improving the space utilization rate of the battery device 100 and making it more conducive to improving the energy density of the battery device 100.

[0168] In some embodiments of this application, please refer to Figure 7 The second protrusion 1222 is used to support at least a portion of the battery cell assembly.

[0169] In some embodiments, the cluster of battery cells closest to the second beam 122 in the battery cell assembly is supported on the second protrusion 1222.

[0170] Of course, in other embodiments, multiple battery cell clusters near the second beam 122 in the battery cell assembly may be supported on the second protrusion 1222.

[0171] By adopting the above technical solution, not only can the frame 12 bear at least part of the weight of the battery cell assembly, thereby improving the overall structural strength of the battery device 100, but it can also reduce the space occupied by the second protrusion 1222 on the battery cell assembly, thereby further improving the space utilization of the battery device 100 and making it more conducive to improving the energy density of the battery device 100.

[0172] Please refer to some embodiments of this application as well. Figure 6 and Figure 7 The battery box 10 also includes a tray 13, which is connected between the first protrusion 1214 and the second protrusion 1222. The tray 13 is used to support the battery cell assembly.

[0173] The tray 13 is a component used to support individual battery cells. The material of the tray 13 can be, but is not limited to, aluminum, aluminum alloy, stainless steel, copper, iron, plastic, etc. The tray 13 can be a one-piece molded component, meaning it is formed as a single unit using a one-piece molding process, such as stamping. The tray 13 can also comprise multiple independently molded components. The connection method between the tray 13 and the first protrusion 1214 can be, but is not limited to, welding, bonding, fastening, etc. The connection method between the tray 13 and the second protrusion 1222 can be, but is not limited to, welding, bonding, fastening, etc.

[0174] In some embodiments, the battery cell cluster closest to the first beam 121 in the battery cell assembly is supported on the first protrusion 1214, the battery cell cluster closest to the second beam 122 in the battery cell assembly is supported on the second protrusion 1222, and the remaining battery cell clusters in the battery cell assembly are supported on the support plate 13.

[0175] In some embodiments, the battery cell assembly is bonded to the tray 13 to improve the overall structural strength of the battery device 100.

[0176] By adopting the above technical solution, the battery cell assembly is effectively supported, thereby improving the structural strength of the battery device 100.

[0177] Please refer to some embodiments of this application as well. Figure 8 and Figure 9 The battery device 100 also includes a control component (not shown) electrically connected to the battery cell assembly, and the support plate 13 also includes a first plate 131 and a second plate 132, the first plate 131 being used to support the battery cell assembly and the second plate 132 being used to support the control component.

[0178] The control component is used to control the battery cell assembly. For example, the control component can control the voltage, current, temperature, etc. of the battery cell assembly.

[0179] The first plate 131 and the second plate 132 can be formed separately and then connected to form a whole, or they can be formed separately and then separated from each other. The first plate 131 is connected to the first protrusion 1214 and the second protrusion 1222, and the second plate 132 is connected to the first protrusion 1214 and the second protrusion 1222.

[0180] In some embodiments, the battery cell assembly is bonded to the first plate 131, and the control assembly is bonded to the second plate to improve the overall structural strength of the battery device 100.

[0181] By adopting the above technical solution, the structural strength of the first plate 131 and the structural strength of the second plate 132 can be designed independently, which not only meets the overall strength requirements of the tray 13, but also reduces the manufacturing cost of the tray 13, thereby effectively reducing the manufacturing cost of the battery device 100.

[0182] Please refer to some embodiments of this application as well. Figure 8 and Figure 9 The frame 12 also includes a third beam 123, which is connected between the first beam 121 and the second beam 122 to divide the internal space of the battery device 100 into a first receiving space 15 for accommodating battery cell components and a second receiving space 16 for accommodating control components. A first plate 131 is provided on the opening side of the first receiving space 15 facing away from the box cover 11, and a second plate 132 is provided on the opening side of the second receiving space 16 facing away from the box cover 11. Both the first plate 131 and the second plate 132 are connected to the third beam 123.

[0183] Understandably, the first accommodating space 15 and the second accommodating space 16 are two spaces separated from each other by the third beam 123. The first accommodating space 15 and the second accommodating space 16 can be connected to each other or not connected to each other.

[0184] A first plate 131 covers the opening side of the first accommodating space 15 facing away from the lid 11, thereby closing the opening side of the first accommodating space 15 facing away from the lid 11. A second plate 132 covers the opening side of the second accommodating space 16 facing away from the lid 11, thereby closing the opening side of the second accommodating space 16 facing away from the lid 11. The first plate 131 is connected to the first protrusion 1214, the second protrusion 1222, and the third beam 123, and the second plate 132 is connected to the first protrusion 1214, the second protrusion 1222, and the third beam 123. The connection method between the first plate 131 and the third beam 123 can be, but is not limited to, welding, bonding, and fastening. The connection method between the second plate 132 and the third beam 123 can be, but is not limited to, welding, bonding, and fastening.

[0185] By adopting the above technical solution, not only can the opening side of the first accommodating space 15 facing away from the box cover 11 and the opening side of the second accommodating space 16 facing away from the box cover 11 be effectively sealed, but the connection strength between the tray 13 and the frame 12 is also effectively improved, thereby effectively improving the structural strength of the battery device 100.

[0186] In some embodiments of this application, the first plate 131 has a heat exchange channel (not shown) for circulating a heat exchange medium.

[0187] Understandably, the heat exchange medium can exchange heat with the battery cells during its flow in the heat exchange channel, so as to regulate the temperature of the battery cells.

[0188] By adopting the above technical solution, the heat exchange medium can exchange heat with the battery cell assembly during the flow of the heat exchange channel, so as to regulate the temperature of the battery cell assembly. That is, the heat exchange structure of the battery cell assembly is integrated on the first plate 131, making the structure of the battery device 100 more compact, thereby further improving the space utilization of the battery device 100.

[0189] Please refer to some embodiments of this application as well. Figure 6 and Figure 7 The bottom guard plate 14 is connected between the first locking part 1211 and the main body part 1221.

[0190] The connection between the bottom guard plate 14 and the first locking part 1211 can be, but is not limited to, welding, bonding, or fastening. The connection between the bottom guard plate 14 and the main body part 1221 can be, but is not limited to, welding, bonding, or fastening.

[0191] In some embodiments, the bottom guard plate 14 is connected between the first locking part 1211 and the second locking part 12211.

[0192] By adopting the above technical solution, the battery cell assembly is effectively protected, thereby effectively improving the reliability of the battery device 100.

[0193] In some embodiments of this application, please refer to Figure 6 The first vertical wall 112 includes a first wall body 1121 and a first flange 1122. The first wall body 1121 is connected to one side of the cover plate 111 along the first direction. The first flange 1122 is connected to the side of the first wall body 1121 away from the cover plate 111. The first flange 1122 protrudes from the first wall body 1121 in a direction away from the battery cell assembly. The first flange 1122 is connected to the first locking part 1211.

[0194] Understandably, the first flange 1122 and the first wall 1121 are arranged at an angle to each other. The angle between the first flange 1122 and the first wall 1121 can be 90°, that is, the first flange 1122 and the first wall 1121 are arranged perpendicular to each other. Of course, in other embodiments, the angle between the first flange 1122 and the first wall 1121 can also be greater than or less than 90°.

[0195] As an example, the first flange 1122 and the first locking part 1211 are connected by the first locking attachment 17 to lock the first upright wall 112 onto the first locking part 1211.

[0196] By adopting the above technical solution, since the first flange 1122 protrudes from the first wall 1121 in a direction away from the battery cell assembly and is used to connect the first locking part 1211, the outer side of the outer envelope structure of the battery device 100 can have enough space to avoid external components, effectively reducing the risk of interference between the battery device 100 and external components, and further improving the space utilization of the battery device 100.

[0197] In some embodiments of this application, the first locking portion 1211 has closed ends at both ends along the second direction, which is perpendicular to the first direction and the height direction of the battery device 100.

[0198] In this embodiment, the first locking part 1211 has at least one first cavity 1215, and the two closed ends of the first locking part 1211 are used to close the first cavity 1215 of the first locking part 1211 so that the first cavity 1215 of the first locking part 1211 is isolated from the external environment of the first beam 121.

[0199] In some embodiments, the second locking portion 12211 has at least one second cavity, and the two ends of the second locking portion 12211 along the second direction are closed ends. The two closed ends of the second locking portion 12211 are used to close the second cavity of the second locking portion 12211 so that the second cavity of the second locking portion 12211 is isolated from the external environment of the second beam 122.

[0200] As an example, the outer periphery of the battery device 100 is roughly rectangular. The first direction can be the width direction of the battery device 100, and the second direction can be the length direction of the battery device 100. Alternatively, the first direction can be the length direction of the battery device 100, and the second direction can be the width direction of the battery device 100.

[0201] As an example, the first direction is as follows Figure 2 and Figure 3 The Y direction is shown, and the second direction is as follows. Figure 2 and Figure 3 The X direction is shown.

[0202] By adopting the above technical solution, the internal environment of the battery box 10 is effectively isolated from the external environment of the battery box 10, thereby effectively improving the sealing performance of the battery device 100.

[0203] In some embodiments of this application, please refer to Figure 3The frame 12 also includes a fourth beam 124 and a fifth beam 125. The fourth beam 124 and the fifth beam 125 are respectively disposed on opposite sides of the battery cell assembly along the second direction. The fourth beam 124 closes one end of the first locking part 1211 along the second direction, and the fifth beam 125 closes the other end of the first locking part 1211 along the second direction.

[0204] Understandably, the first beam 121, the second beam 122, the fourth beam 124 and the fifth beam 125 cooperate to form the main body 1221 of the frame 12, thereby defining the outer perimeter boundary of the internal environment of the battery device 100.

[0205] In some embodiments, both the fourth beam 124 and the fifth beam 125 extend along a first direction. One end of the fourth beam 124 along the first direction abuts against one end of the first locking part 1211 along the second direction to close one end of the first locking part 1211 along the second direction. One end of the fifth beam 125 along the first direction abuts against the other end of the first locking part 1211 along the second direction to close the other end of the first locking part 1211 along the second direction.

[0206] As an example, the end of the fourth beam 124 away from the first beam 121 along the first direction is attached to the end of the second locking part 12211 along the second direction to close the end of the second locking part 12211 along the second direction, and the end of the fifth beam 125 away from the first beam 121 along the first direction is attached to the other end of the second locking part 12211 along the second direction to close the other end of the second locking part 12211 along the second direction.

[0207] In some embodiments, one end of the fourth beam 124 along the first direction is bonded to one end of the first locking portion 1211 along the second direction to close one end of the first locking portion 1211 along the second direction; one end of the fourth beam 124 along the first direction away from the first beam 121 is bonded to one end of the second locking portion 12211 along the second direction to close one end of the second locking portion 12211 along the second direction; one end of the fifth beam 125 along the first direction is bonded to the other end of the first locking portion 1211 along the second direction to close the other end of the first locking portion 1211 along the second direction; one end of the fifth beam 125 along the first direction away from the first beam 121 is bonded to the other end of the second locking portion 12211 along the second direction to close the other end of the second locking portion 12211 along the second direction.

[0208] By adopting the above technical solution, it is easy to close both ends of the first locking part 1211 along the second direction. The structure is simple and easy to implement.

[0209] In some embodiments of this application, the battery device 100 further includes a first sealing member (not shown) and a second sealing member (not shown), the first sealing member closing one end of the first locking part 1211 along the second direction, and the second sealing member closing the other end of the first locking part 1211 along the second direction.

[0210] In some embodiments, the battery device 100 further includes a third sealing member (not shown) and a fourth sealing member (not shown), the third sealing member closing one end of the second locking portion 12211 along the second direction, and the fourth sealing member closing the other end of the second locking portion 12211 along the second direction.

[0211] By adopting the above technical solution, the first locking part 1211 is effectively sealed at both ends along the second direction, thereby effectively improving the sealing performance of the battery device 100.

[0212] Secondly, please refer to Figure 1 This application also provides an electrical device, including the battery device 100 described in any of the above embodiments.

[0213] The electrical equipment provided in this application embodiment effectively improves the space utilization rate of the electrical equipment by using the battery device 100 described in any of the above embodiments.

[0214] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device (100), characterized in that, The battery device (100) includes: Multiple battery cells (20) are arranged to form a battery cell assembly; A battery box (10) is used to house the battery cell assembly. The battery box (10) includes a cover (11) and a frame (12). The cover (11) has a cover plate (111) and a first vertical wall (112). The first vertical wall (112) is connected to one side of the cover plate (111) along a first direction. The frame (12) includes a first beam (121). The first beam (121) is disposed on one side of the battery cell assembly along the first direction. The first direction is perpendicular to the height direction of the battery device (100). The first beam (121) includes a first locking part (1211). The first vertical wall (112) is connected to the first locking part (1211). Wherein, the minimum dimension H1 of the first vertical wall (112) along the height direction of the battery device (100) is greater than or equal to the maximum dimension H2 of the first locking part (1211) along the height direction of the battery device (100).

2. The battery device (100) according to claim 1, characterized in that, The ratio of the dimension H2 of the first locking part (1211) along the height direction of the battery device (100) to the dimension H1 of the first vertical wall (112) along the height direction of the battery device (100) is 0.3-1.

3. The battery device (100) according to claim 1, characterized in that, The first beam (121) further includes a first mounting part (1212), which is disposed on the side of the first locking part (1211) facing away from the battery cell assembly along the first direction. The first mounting part (1212) is used to connect an external bracket.

4. The battery device (100) according to claim 3, characterized in that, The distance L between the first mounting part (1212) and the first locking part (1211) along the first direction is 10mm-100mm.

5. The battery device (100) according to claim 3, characterized in that, The first beam (121) also includes a first partition (1213), which is disposed between the first locking part (1211) and the first mounting part (1212).

6. The battery device (100) according to claim 5, characterized in that, The first partition (1213) has a first partition cavity (12131) for separating the first locking part (1211) from the first mounting part (1212).

7. The battery device (100) according to claim 1, characterized in that, The maximum dimension H2 of the first locking part (1211) along the height direction of the battery device (100) is smaller than the maximum dimension H3 of the battery cell (20) along the height direction of the battery device (100).

8. The battery device (100) according to claim 7, characterized in that, The ratio of the maximum dimension H2 of the first locking part (1211) along the height direction of the battery device (100) to the maximum dimension H3 of the battery cell (20) along the height direction of the battery device (100) is 0.2-0.

5.

9. The battery device (100) according to claim 1, characterized in that, The side of the first upright wall (112) facing the battery cell assembly is flush with the side of the first locking part (1211) facing the battery cell assembly.

10. The battery device (100) according to claim 1, characterized in that, The first beam (121) has a plurality of first cavities (1215), and each of the first cavities (1215) is arranged sequentially along a straight line parallel to the first direction.

11. The battery device (100) according to any one of claims 1-10, characterized in that, The first beam (121) also includes a first protrusion (1214), which is connected to the first locking part (1211) and protrudes from the first locking part (1211) toward the direction of the battery cell assembly.

12. The battery device (100) according to claim 11, characterized in that, The first protrusion (1214) is used to support at least a portion of the battery cell assembly.

13. The battery device (100) according to claim 11, characterized in that, The frame (12) further includes a second beam (122) disposed on the side of the battery cell assembly facing away from the first beam (121) along the first direction. The second beam (122) includes a main body (1221) and a second protrusion (1222). The cover (11) is connected to the main body (1221) along the first direction away from the first wall (112). The second protrusion (1222) is connected to the main body (1221) and protrudes from the main body (1221) toward the direction close to the battery cell assembly.

14. The battery device (100) according to claim 13, characterized in that, The second protrusion (1222) is used to support at least a portion of the battery cell assembly.

15. The battery device (100) according to claim 14, characterized in that, The battery box (10) also includes a tray (13), which is connected between the first protrusion (1214) and the second protrusion (1222) and is used to support the battery cell assembly.

16. The battery device (100) according to claim 15, characterized in that, The battery device (100) further includes a control component electrically connected to the battery cell assembly, and the tray (13) further includes a first plate (131) and a second plate (132), the first plate (131) being used to support the battery cell assembly, and the second plate (132) being used to support the control component.

17. The battery device (100) according to claim 16, characterized in that, The frame (12) also includes a third beam (123), which is connected between the first beam (121) and the second beam (122) to divide the internal space of the battery device (100) into a first accommodating space (15) for accommodating the battery cell assembly and a second accommodating space (16) for accommodating the control assembly. The first plate (131) covers the opening side of the first accommodating space (15) facing away from the box cover (11), and the second plate (132) covers the opening side of the second accommodating space (16) facing away from the box cover (11). Both the first plate (131) and the second plate (132) are connected to the third beam (123).

18. The battery device (100) according to claim 16, characterized in that, The first plate (131) has a heat exchange channel for circulating heat exchange medium.

19. The battery device (100) according to claim 13, characterized in that, The battery box (10) also includes a bottom guard plate (14), which is connected between the first locking part (1211) and the main body part (1221).

20. The battery device (100) according to any one of claims 1-10, characterized in that, The first vertical wall (112) includes a first wall body (1121) and a first flange (1122). The first wall body (1121) is connected to one side of the cover plate (111) along a first direction. The first flange (1122) is connected to the side of the first wall body (1121) away from the cover plate (111). The first flange (1122) protrudes from the first wall body (1121) in a direction away from the battery cell assembly. The first flange (1122) is connected to the first locking part (1211).

21. The battery device (100) according to any one of claims 1-10, characterized in that, The first locking part (1211) has closed ends at both ends along the second direction, which is perpendicular to the first direction and the height direction of the battery device (100).

22. The battery device (100) according to claim 21, characterized in that, The frame (12) further includes a fourth beam (124) and a fifth beam (125), the fourth beam (124) and the fifth beam (125) being disposed on opposite sides of the battery cell assembly along the second direction, the fourth beam (124) closing one end of the first locking part (1211) along the second direction, and the fifth beam (125) closing the other end of the first locking part (1211) along the second direction.

23. The battery device (100) according to claim 21, characterized in that, The battery device (100) further includes a first sealing member and a second sealing member, the first sealing member closing one end of the first locking part (1211) along the second direction, and the second sealing member closing the other end of the first locking part (1211) along the second direction.

24. The battery device (100) according to any one of claims 1-10, characterized in that, The first locking part (1211) is located within the projection range of the cover (11) along the height direction of the battery device (100).

25. The battery device (100) according to any one of claims 1-10, characterized in that, The battery box (10) also includes a first locking attachment (17), which is used to connect the first upright wall (112) and the first locking part (1211). The first locking part (1211) is located within the projection range of the first locking attachment (17) along the height direction of the battery device (100).

26. An electrical appliance, characterized in that, The electrical equipment includes a battery device (100) as described in any one of claims 1-25.

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