Box assembly, battery device, energy storage device and power utilization device

Abstract

The embodiment of the utility model provides a box body assembly, a battery device, an energy storage device and a power utilization device. The battery device comprises a box body assembly and a battery monomer assembly. The box body assembly comprises a frame and an end cover, a through accommodating cavity is defined by the frame, the end cover seals at least one end of the accommodating cavity, and the accommodating cavity is used for accommodating the battery monomer assembly. Wherein at least part of the frame comprises a side wall, an end wall and a supporting piece, the end wall is connected with at least one end of the side wall in the height direction of the battery device, one end of the supporting piece is connected with the side wall, and the other end of the supporting piece is connected with the end wall. The frame is connected with the end cover through the end wall. According to the battery device provided by the embodiment of the invention, the supporting piece is arranged, and the two ends of the supporting piece are respectively connected with the side wall and the end wall, so that the end wall can be supported, the connection strength of the end wall and the end cover is improved, the structural strength of the box body assembly is improved to a certain extent, and the reliability of the battery device is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a housing assembly, a battery device, an energy storage device, and an electrical device. Background Technology

[0002] This section is intended to provide background or context for embodiments of this application. The description herein is not intended to imply that it is prior art simply because it is included in this section.

[0003] In new energy vehicles equipped with battery packs, the battery packs can provide all or part of the power. The battery housing is a crucial component of the battery pack, serving to house and protect the internal battery cells. Therefore, improving the structural strength of the battery housing has become a significant issue in the development of battery packs. Utility Model Content

[0004] In view of this, the embodiments of this application aim to provide a housing assembly, a battery device, an energy storage device, and an electrical device, which to a certain extent helps to improve the structural strength of the housing assembly, thereby improving the reliability of the battery device.

[0005] To achieve the above objectives, a first aspect of this application provides a battery device, comprising:

[0006] Battery cell assembly;

[0007] A housing assembly includes a frame and an end cap, the frame surrounding a through-hole receiving cavity, and the end cap closing at least one end of the receiving cavity, the receiving cavity being used to receive the battery cell assembly;

[0008] The frame includes at least a side wall, an end wall, and a support member. The end wall is connected to at least one end of the side wall along the height direction of the battery device. One end of the support member is connected to the side wall, and the other end is connected to the end wall. The frame is connected to the end cap through the end wall.

[0009] The battery device provided in this application includes a housing assembly and battery cell assemblies. The battery cell assemblies are disposed within the housing cavity of the housing assembly, and the housing assembly protects the battery cell assemblies. By configuring at least a portion of the frame to include side walls, end walls, and support members, with one end of the support member connected to the side wall and the other end connected to the end wall, that is, by providing support members with both ends connected to the side wall and the end wall respectively, the end wall can be supported. This helps to improve the connection strength between the end wall and the end cover, and to a certain extent, improves the structural strength of the housing assembly, thereby improving the reliability of the battery device.

[0010] In some embodiments, the frame is a plate-shaped structural component formed by extrusion or stamping.

[0011] Here, plate-like structural components refer to those similar to metal sheets, that is, frames are formed by direct extrusion or by stamping metal sheets.

[0012] In some embodiments, the border is a one-piece structure.

[0013] Here, by making the frame a one-piece structure, assembly steps can be reduced, meaning fewer parts need to be assembled during the assembly process, improving assembly efficiency and thus production efficiency. Furthermore, a one-piece frame structure helps improve the structural strength of the frame. Moreover, by making the frame a sheet-like structural component through extrusion or stamping, this structure helps reduce the weight of the housing assembly, lower costs, reduce space occupation, and ultimately improve the energy density of the battery device.

[0014] In some embodiments, the support is connected to the end of the end wall away from the side wall.

[0015] In this embodiment, connecting the support member to the end of the end wall away from the side wall helps to further improve the support effect of the support member on the end wall.

[0016] In some embodiments, the width of the end wall is 10mm-50mm.

[0017] In this embodiment, by setting the width of the end wall to 10mm-50mm, the appropriate width within this range is beneficial for the connection between the end wall and the end cap, and also for the support of the end wall by the support member, thereby improving the connection strength between the end wall and the end cap.

[0018] In some embodiments, the distance between the connection point of the support member and the side wall and the end wall is 10mm-50mm.

[0019] In this embodiment, by setting the distance between the connection between the support member and the side wall and the end wall to 10mm-50mm, the appropriate distance within this range is beneficial for supporting the end wall through the support member, thereby improving the connection strength between the end wall and the end cap.

[0020] In some embodiments, the cross-sectional shape of the cavity formed between the sidewall, the endwall, and the support is polygonal.

[0021] In this embodiment, by setting the cross-sectional shape of the cavity formed between the sidewall, endwall, and support member to a stable structure such as a polygon, it is beneficial to improve the connection strength between the endwall and the end cap.

[0022] In some embodiments, the cross-sectional shape of the cavity formed between the sidewall, the endwall, and the support member is triangular, and the included angle between the support member and the sidewall is in the range of 10°-80°.

[0023] In this embodiment, by setting the included angle between the support member and the side wall to a range of 10°-80°, it is beneficial to improve the support effect of the support member on the end wall, while also facilitating the installation of the support member.

[0024] In some embodiments, the wall thickness of the frame is 0.5mm-10mm.

[0025] In this embodiment, by setting the wall thickness of the frame to 0.5mm-10mm, it is beneficial to give the frame a certain structural strength, improve the overall stability and reliability of the housing assembly, reduce the weight of the housing assembly and reduce the cost, and increase the energy density of the battery device.

[0026] In some embodiments, the wall thickness of the frame is 2mm-3mm.

[0027] In this embodiment, by setting the wall thickness of the frame to 2mm-3mm, the frame has better structural strength, which improves the overall stability and reliability of the housing assembly, while reducing the weight and cost of the housing assembly, and further improving the energy density of the battery device.

[0028] In some embodiments, the frame is made of aluminum profile.

[0029] In some embodiments, the end wall is disposed on the side of the side wall facing and / or away from the receiving cavity.

[0030] In other words, an end wall can be provided on the side of the frame facing and / or away from the receiving cavity as needed, for connection with the end cover, and the side wall can be supported as needed.

[0031] A second aspect of this application provides a housing assembly, which is the housing assembly of the battery device described above, and the housing assembly is used to house the battery cell assembly.

[0032] The housing assembly provided in this application embodiment is used to house battery cell assemblies and protects the battery cell assemblies. By configuring at least a portion of the frame to include side walls, end walls, and support members, with one end of the support member connected to the side wall and the other end connected to the end wall, that is, by providing support members with both ends connected to the side wall and the end wall respectively, the end wall can be supported. This helps to improve the connection strength between the end wall and the end cover, and to a certain extent, helps to improve the structural strength of the housing assembly, thereby improving the reliability of the battery device.

[0033] A third aspect of this application provides an energy storage device including a plurality of battery devices as described above, the battery devices being used to store or provide electrical energy.

[0034] The battery device of the energy storage device provided in this application embodiment includes a housing assembly and a battery cell assembly. The battery cell assembly is disposed within the receiving cavity of the housing assembly, and the housing assembly protects the battery cell assembly. By configuring at least a portion of the frame to include side walls, end walls, and support members, with one end of the support member connected to the side wall and the other end connected to the end wall, that is, by providing support members with both ends connected to the side wall and the end wall respectively, the end wall can be supported. This helps to improve the connection strength between the end wall and the end cover, and to a certain extent, improves the structural strength of the housing assembly, thereby improving the reliability of the battery device.

[0035] A fourth aspect of this application provides an electrical device, including the battery device or the energy storage device described above, wherein the battery device is used to store or provide electrical energy.

[0036] The battery device of the power device provided in this application embodiment includes a housing assembly and a battery cell assembly. The battery cell assembly is disposed within the receiving cavity of the housing assembly, and the housing assembly protects the battery cell assembly. By configuring at least a portion of the frame to include side walls, end walls, and support members, with one end of the support member connected to the side wall and the other end connected to the end wall, that is, by providing support members with both ends connected to the side wall and the end wall respectively, the end wall can be supported. This helps to improve the connection strength between the end wall and the end cover, and to a certain extent, improves the structural strength of the housing assembly, thereby improving the reliability of the battery device. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application;

[0038] Figure 2 A partial structural schematic diagram of a housing assembly provided in an embodiment of this application;

[0039] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0040] Figure 4 This is a schematic diagram of the frame structure provided in the first embodiment of this application;

[0041] Figure 5 A schematic diagram of the frame structure provided in the second embodiment of this application.

[0042] Explanation of reference numerals in the attached figures

[0043] 10. Housing assembly; 11. Frame; 12. Frame; 121. Side wall; 122. End wall; 123. Support; 13. Receiving cavity; 100. Battery unit; 200. Controller; 300. Motor; 1000. Vehicle. Detailed Implementation

[0044] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0045] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0046] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the allowable tolerance range. "Parallel" is not parallel in the strict sense, but within the allowable tolerance range.

[0047] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances.

[0048] With the development of clean energy, more and more devices are using electricity as their driving force, leading to the rapid development of power batteries, such as lithium-ion batteries, which can store a large amount of electrical energy and can be repeatedly charged and discharged. These power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields.

[0049] The battery apparatus 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 connected in series, parallel, or mixed connections via a busbar.

[0050] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0051] The battery cell 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.

[0052] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0053] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0054] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0055] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0056] In some embodiments, the battery device may be a battery pack, which includes a housing assembly and one or more individual battery cells housed within the housing assembly.

[0057] As an example, the battery cell assembly can be a battery module, which can be housed in the housing assembly by fixing the battery module in the housing assembly.

[0058] As an example, battery cell assemblies can also be housed within a housing assembly by directly fixing multiple battery cells to the housing assembly.

[0059] The development of battery technology must take into account multiple design factors, such as performance parameters like energy density, discharge capacity, and charge / discharge rate. In addition, the reliability of the battery device also needs to be considered.

[0060] The housing assembly is a crucial component of a battery device, serving to house and protect the internal battery cells. Therefore, improving the structural strength of the housing assembly has become a significant challenge in the development of battery devices.

[0061] In view of this, in order to improve the structural strength of the housing assembly and thus improve the reliability of the battery device, embodiments of this application provide a battery device including a housing assembly and a battery cell assembly. The housing assembly includes a frame and an end cap. The frame surrounds a through-hole receiving cavity, and the end cap closes at least one end of the receiving cavity, which is used to receive the battery cell assembly. At least a portion of the frame includes a side wall, an end wall, and a support member. The end wall is connected to at least one end of the side wall along the height direction of the battery device. One end of the support member is connected to the side wall, and the other end is connected to the end wall. The frame is connected to the end cap via the end wall.

[0062] The battery device provided in this application includes a housing assembly and battery cell assemblies. The battery cell assemblies are disposed within the housing cavity of the housing assembly, and the housing assembly protects the battery cell assemblies. By configuring at least a portion of the frame to include side walls, end walls, and support members, with one end of the support member connected to the side wall and the other end connected to the end wall, that is, by providing support members with both ends connected to the side wall and the end wall respectively, the end wall can be supported. This helps to improve the connection strength between the end wall and the end cover, and to a certain extent, improves the structural strength of the housing assembly, thereby improving the reliability of the battery device.

[0063] This application provides an electrical device, including a battery device or an energy storage device according to any embodiment of this application, wherein the battery device is used to store or provide electrical energy.

[0064] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. 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, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0065] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device.

[0066] Please refer to Figure 1The vehicle 1000 may contain a controller 200, a motor 300, and a battery device 100. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, 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, it can serve as the operating power source for the vehicle 1000's electrical system, such as for the power requirements of starting, navigation, and operation. In another embodiment 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, replacing or partially replacing fuel or natural gas to provide driving power to the vehicle 1000.

[0067] This application provides an energy storage device, including a plurality of battery devices 100 according to any embodiment of this application, wherein the battery devices 100 are used to store or provide electrical energy.

[0068] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0069] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0070] Please see Figure 2 This application provides a battery device 100, which includes a housing assembly 10 and a battery cell assembly. The housing assembly 10 includes a frame 12 and an end cap. The frame 12 surrounds a through-hole receiving cavity 13, and the end cap closes at least one end of the receiving cavity 13. The receiving cavity 13 is used to receive the battery cell assembly. At least a portion of the frame 12 includes a side wall 121, an end wall 122, and a support member 123. The end wall 122 is connected to at least one end of the side wall 121 along the height direction of the battery device 100. One end of the support member 123 is connected to the side wall 121, and the other end is connected to the end wall 122. The frame 12 is connected to the end cap via the end wall 122.

[0071] The battery cell assembly includes at least one battery cell, which is disposed within the receiving cavity 13 of the housing assembly 10.

[0072] The housing assembly 10 is used to encapsulate the battery cell assembly, and the housing assembly 10 can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cell assembly.

[0073] As an example, the housing assembly 10 may include a first housing and a second housing. The first housing and the second housing are fastened together to form a closed receiving cavity 13 inside the housing assembly 10 to house the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing may be a lower housing or an upper housing.

[0074] As an example, the housing assembly 10 may include a top cover, a frame 11, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame 11, so that the interior of the housing assembly 10 forms a closed receiving cavity 13 to accommodate the battery cell assembly.

[0075] In some embodiments, the housing assembly 10 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing assembly 10 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing assembly 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0076] Here, the number of borders 12 can be one or more.

[0077] In the embodiments of this application, "multiple" refers to two or more items.

[0078] In embodiments where there are multiple borders 12, the multiple borders 12 surround to form a frame 11. Here, the multiple borders 12 are assembled and welded together, with the ends of the borders 12 having cuts at a preset angle, and are assembled and welded together with adjacent borders 12. For example, the ends of the borders 12 have cuts at 45°, and are assembled and welded together with adjacent borders 12 having cuts at 45°, so that the two borders 12 are set perpendicular to each other.

[0079] It should be noted that the structure of each border 12 can be the same or different; similarly, the size of each border 12 can be the same or different.

[0080] In related technologies, the frame is an extruded hollow beam and the interior is an extruded ribbed structure, which results in a heavy box, high cost, large space occupation, and low energy density of the battery device.

[0081] For example, by setting the frame 12 as a single thin-walled structural member including sidewalls 121 and endwalls 122, i.e. a plate-like structural member, it is beneficial to reduce the weight of the frame 12, thereby reducing the weight of the housing assembly 10, reducing costs, reducing space occupation, and improving the energy density of the battery device 100.

[0082] Here, the end wall 122 and the side wall 121 are connected at least one end along the height direction of the battery device 100. That is to say, the end wall 122 can refer to the top wall, the bottom wall, or both.

[0083] For example, the battery device 100 also includes a bottom cover plate, to which the bottom wall can be connected.

[0084] In some embodiments, please refer to Figures 2 to 5 The frame 12 can be a plate-shaped structural component formed by extrusion or stamping.

[0085] Here, plate-shaped structural components refer to those similar to metal plates, i.e., the frame 12 is formed by direct extrusion or by stamping a metal plate.

[0086] It should be noted that the specific material of the border 12 is not limited here.

[0087] For example, the frame 12 can be an aluminum profile.

[0088] Here, the frame 12 includes, but is not limited to, 5-series, 6-series, or 7-series aluminum alloy.

[0089] Of course, frame 12 can also be a lightweight and high-strength composite material structural component.

[0090] In some embodiments, please refer to Figure 4 and Figure 5 The frame 12 is a one-piece structure.

[0091] For example, the frame 12 is a one-piece structure formed by stamping or by extrusion.

[0092] For example, the frame 12 is a plate-shaped structural member formed by extrusion or stamping.

[0093] Here, by making the frame 12 a one-piece structure, assembly steps can be reduced, that is, the number of parts to be assembled is reduced during the assembly process, improving assembly efficiency and thus production efficiency. Furthermore, making the frame 12 a one-piece structure helps to improve the structural strength of the frame 12. Moreover, by making the frame 12 a plate-like structural component formed by extrusion or stamping, this structure helps to reduce the weight of the housing assembly 10, lower costs, reduce space occupation, and help to improve the energy density of the battery device 100.

[0094] Here, "at least one end of the end cap closing the receiving cavity 13" means that the end cap can be one end of the receiving cavity 13 or both ends of the receiving cavity 13.

[0095] For example, the housing assembly 10 also includes a base plate, and the end caps and the base plate are respectively connected to the frame 11, so that the interior of the housing assembly 10 forms a closed space to accommodate the battery cell assembly. Here, "closed" means covered or closed, and can be sealed or unsealed.

[0096] In some embodiments, the bottom guard plate is the same as the base plate; in other embodiments, the bottom guard plate is disposed below the base plate.

[0097] The connection method between the end cap and the end wall 122 is not limited here; for example, it can be a fastening connection or a welding connection.

[0098] Here, fastening connections include, but are not limited to, riveting, bolting, or screwing.

[0099] In related technologies, the frame is connected to the end cover through the end wall, such as by riveting. However, the end wall may not be strong enough, which may result in insufficient connection strength between the frame and the end cover.

[0100] For example, the locking hole on the end wall 122 can be machined.

[0101] To address the aforementioned issues, this application embodiment provides a support member 123, with its two ends connected to the side wall 121 and the end wall 122, respectively. This support member 123 provides support to the end wall 122, thereby improving the structural strength of the frame 12.

[0102] The battery device 100 provided in this application embodiment includes a housing assembly 10 and a battery cell assembly. The battery cell assembly is disposed within the receiving cavity 13 of the housing assembly 10, and the housing assembly 10 protects the battery cell assembly. By configuring at least a portion of the frame 12 to include a side wall 121, an end wall 122, and a support member 123, with one end of the support member 123 connected to the side wall 121 and the other end connected to the end wall 122, that is, by providing the support member 123, with both ends of the support member 123 connected to the side wall 121 and the end wall 122 respectively, the end wall 122 can be supported. This helps to improve the connection strength between the end wall 122 and the end cap, and to a certain extent, helps to improve the structural strength of the housing assembly 10, thereby improving the reliability of the battery device 100.

[0103] It should be noted that the specific location of the frame 12 in this embodiment is not limited, for example, it can be set on the front and / or rear side of the box assembly 10.

[0104] In some embodiments, please refer to Figures 2 to 5 The support member 123 is connected to the end of the end wall 122 away from the side wall 121.

[0105] Here, one end of the end wall 122 is connected to the side wall 121, and the other end extends away from the side wall 121.

[0106] Here, the width of the end wall 122 is the size of the end of the end wall 122 away from the side wall 121 and the end of the end wall 122 connected to the side wall 121.

[0107] In other words, the two ends of the end wall 122 in the width direction are connected to the side wall 121 and the support member 123 respectively. In this way, when the end wall 122 is subjected to force, the side wall 121 and the support member 123 can support the end wall 122, thereby improving the structural strength of the frame 12.

[0108] In this embodiment, by connecting the support member 123 to the end of the end wall 122 away from the side wall 121, it is beneficial to further improve the support effect of the support member 123 on the end wall 122.

[0109] In some embodiments, please refer to Figures 3 to 5 The width of end wall 122 is 10mm-50mm.

[0110] The width of the end wall 122 can be any one of 10mm, 12mm, 15mm, 18mm, 20mm, 22mm, 23mm, 25mm, 26mm, 28mm, 30mm, 32mm, 35mm, 36mm, 38mm, 40mm, 42mm, 45mm, 48mm, or 50mm, or a value between any two.

[0111] It is understandable that a larger width of the end wall 122 is more conducive to the connection between the end wall 122 and the end cap, but it will affect the structural strength of the end of the end wall 122 away from the side wall 121.

[0112] In this embodiment, by setting the width of the end wall 122 to 10mm-50mm, the appropriate width within this range is beneficial to the connection between the end wall 122 and the end cap, and also beneficial to the support of the end wall 122 by the support member 123, thereby improving the connection strength between the end wall 122 and the end cap.

[0113] In some embodiments, please refer to Figures 4 to 5 The distance between the connection point of the support member 123 and the side wall 121 and the end wall 122 is 10mm-50mm.

[0114] The distance between the connection point of the support member 123 and the side wall 121 and the end wall 122 can be any one of 10mm, 12mm, 15mm, 18mm, 20mm, 22mm, 23mm, 25mm, 26mm, 28mm, 30mm, 32mm, 35mm, 36mm, 38mm, 40mm, 42mm, 45mm, 48mm, or 50mm, or any value between two of them.

[0115] In this embodiment, by setting the distance between the connection between the support member 123 and the side wall 121 and the end wall 122 to 10mm-50mm, the distance within this range is appropriate, which is conducive to supporting the end wall 122 through the support member 123, thereby improving the connection strength between the end wall 122 and the end cap.

[0116] In some embodiments, please refer to Figures 3 to 5 The cross-sectional shape of the cavity formed by the side wall 121, end wall 122 and support member 123 is polygonal.

[0117] Here, the cross-sectional shape of the cavity formed between the side wall 121, the end wall 122, and the support member 123 refers to the shape of the cross-section of the cavity taken by a plane perpendicular to the extending direction of the end wall 122.

[0118] Here, polygons can be stable structures such as triangles and quadrilaterals.

[0119] For example, the cross-sectional shape of the cavity can be an isosceles triangle.

[0120] In this embodiment, by setting the cross-sectional shape of the cavity formed between the side wall 121, the end wall 122 and the support member 123 to a stable structure such as a polygon, it is beneficial to improve the connection strength between the end wall 122 and the end cap.

[0121] In some embodiments, please refer to Figures 3 to 5 The cavity formed by the side wall 121, end wall 122 and support member 123 has a triangular cross-sectional shape, and the included angle between the support member 123 and the side wall 121 is in the range of 10°-80°.

[0122] The included angle between the support member 123 and the side wall 121 can be any one of 10°, 12°, 15°, 18°, 20°, 22°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80° or any combination thereof.

[0123] In this embodiment, by setting the included angle between the support member 123 and the side wall 121 to a range of 10°-80°, it is beneficial to improve the support effect of the support member 123 on the end wall 122, while also facilitating the setting of the support member 123.

[0124] In some embodiments, please refer to Figure 4 The wall thickness of frame 12 is 0.5mm-10mm.

[0125] For example, the thicknesses are 0.5mm, 1mm, 1.5mm, 1.8mm, 2mm, 3mm, 3.1mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.6mm, 7mm, 7.5mm, 8mm, 8.5mm, 8.8mm, 9mm, 9.5mm, 10mm, etc.

[0126] It is understandable that the greater the wall thickness of the frame 12, the better it is to improve the structural strength of the frame 12, thereby improving the overall stability and reliability of the housing assembly 10; the smaller the wall thickness of the frame 12, the better it is to reduce the weight of the housing assembly 10 and reduce the cost.

[0127] In this embodiment, by setting the wall thickness of the frame 12 to 0.5mm-10mm, it is beneficial to make the frame 12 have a certain structural strength, improve the overall stability and reliability of the housing assembly 10, reduce the weight of the housing assembly 10 and reduce the cost, and improve the energy density of the battery device 100.

[0128] In some embodiments, please refer to Figure 4 The wall thickness of frame 12 is 2mm-3mm.

[0129] For example, the thicknesses are 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, etc.

[0130] In this embodiment, by setting the wall thickness of the frame 12 to 2mm-3mm, the frame 12 has better structural strength, which improves the overall stability and reliability of the housing assembly 10, while reducing the weight and cost of the housing assembly 10, and further improving the energy density of the battery device 100.

[0131] In some embodiments, please refer to Figure 2 The end wall 122 is located on the side of the side wall 121 facing and / or away from the receiving cavity 13.

[0132] Here, "end wall 122 is provided on the side of side wall 121 facing and / or away from the receiving cavity 13" means that the end wall 122 can be provided on the side of side wall 121 facing the receiving cavity 13, or on the side of side wall 121 away from the receiving cavity 13, or the end wall 122 can be provided on both the side of side wall 121 facing the receiving cavity 13 and the side of side wall 121 away from the receiving cavity 13.

[0133] In other words, as needed, the side of the frame 12 facing and / or away from the receiving cavity 13 can be provided with an end wall 122 for connection with the end cap, and the side wall 121 can be supported as needed.

[0134] It should be noted that the width of the end wall 122, the distance between the connection between the support member 123 and the side wall 121 and the end wall 122, the included angle between the support member 123 and the side wall 121, and the wall thickness of the frame 12 can all be measured by vernier calipers before the frame 12 is assembled; it should be noted that the above measurements can all be performed at normal temperature and pressure.

[0135] In the description of this application, the references to terms such as "in one embodiment," "in some embodiments," "in other embodiments," "in yet another embodiment," or "exemplary," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine the different embodiments or examples described in this application, as well as the features of the different embodiments or examples.

[0136] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A battery device, characterized in that, include: Battery cell assembly; A housing assembly includes a frame and an end cap, the frame surrounding a through-hole receiving cavity, and the end cap closing at least one end of the receiving cavity, the receiving cavity being used to receive the battery cell assembly; The frame includes at least a side wall, an end wall, and a support member. The end wall is connected to at least one end of the side wall along the height direction of the battery device. One end of the support member is connected to the side wall, and the other end is connected to the end wall. The frame is connected to the end cap through the end wall.

2. The battery device according to claim 1, characterized in that, The frame is a plate-shaped structural component formed by extrusion or stamping.

3. The battery device according to claim 1, characterized in that, The frame is a one-piece structure.

4. The battery device according to claim 1, characterized in that, The support member is connected to the end of the end wall away from the side wall.

5. The battery device according to claim 1, characterized in that, The width of the end wall is 10mm-50mm.

6. The battery device according to claim 1, characterized in that, The distance between the connection point of the support member and the side wall and the end wall is 10mm-50mm.

7. The battery device according to claim 1, characterized in that, The cross-sectional shape of the cavity formed between the sidewall, the endwall, and the support member is polygonal.

8. The battery device according to claim 7, characterized in that, The cavity formed by the sidewall, the endwall and the support member has a triangular cross-sectional shape, and the included angle between the support member and the sidewall is in the range of 10°-80°.

9. The battery device according to any one of claims 1-8, characterized in that, The wall thickness of the frame is 0.5mm-10mm.

10. The battery device according to claim 9, characterized in that, The wall thickness of the frame is 2mm-3mm.

11. The battery device according to any one of claims 1-8, characterized in that, The frame is made of aluminum profile.

12. The battery device according to any one of claims 1-8, characterized in that, The end wall is located on the side of the side wall facing and / or away from the receiving cavity.

13. A housing assembly, characterized in that, The housing assembly is the housing assembly of the battery device according to any one of claims 1-12, and the housing assembly is used to house the battery cell assembly.

14. An energy storage device, characterized in that, It includes a plurality of battery devices according to any one of claims 1-12, the battery devices being used to store or provide electrical energy.

15. An electrical appliance, characterized in that, Includes a battery device according to any one of claims 1-12, the battery device being used to store or provide electrical energy.

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