Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device, the battery device comprises a box body, a battery monomer assembly and a constraint piece, the box body comprises a plurality of limiting beams which are oppositely arranged along a first direction; each battery monomer assembly is arranged between every two adjacent limiting beams, and each battery monomer assembly comprises a plurality of battery monomers arranged in the first direction; the restraining piece comprises a main body part and connecting parts, the connecting parts are arranged at the two ends of the main body part in the first direction, the thickness of the connecting parts is larger than that of the main body part, and the connecting parts are connected to the limiting beam. According to the structure, the thickness of the connecting part, connected with the limiting beams, in the restraining piece is set to be larger than that of the main body part, so that the connecting part can bear larger acting force, and the restraining piece can provide larger restraining force for the two limiting beams oppositely arranged in the first direction to reinforce the limiting beams; and the limiting beams can better bear the acting force caused by the expansion of the battery monomers, so that the weight reduction of the limiting beams is facilitated, and the weight of the battery device is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and a power utilization device. BACKGROUND

[0002] The battery device has the advantages of high specific energy and high power density, and is widely used in electronic devices and vehicles, such as mobile phones, notebook computers, electric vehicles, electric cars, electric planes, electric ships and electric tools.

[0003] With the increasingly wide application of the battery device, people have higher and higher requirements for the battery device. How to reduce the weight of the battery device has begun to attract the attention of those skilled in the art. UTILITY MODEL CONTENT

[0004] In view of the above problems, the present application provides a battery device and a power utilization device, which has a lighter weight.

[0005] In a first aspect, some embodiments of the present application provide a battery device, which comprises a box body, a battery monomer assembly, a constraint member and an insulating pressing strip, the box body comprises a plurality of limiting beams arranged opposite to each other along a first direction; the battery monomer assembly is arranged between two adjacent limiting beams, and the battery monomer assembly comprises a plurality of battery monomers arranged along the first direction; the constraint member comprises a main body part and a connecting part, the main body part is provided with the connecting part at both ends in the first direction, the thickness of the connecting part is greater than the thickness of the main body part, the connecting part is connected to the limiting beam, and at least part of the insulating pressing strip is clamped between the main body part and the battery monomer.

[0006] In the above structure, since the thickness of the connecting part of the constraint member connected to the limiting beam is set to be greater than the thickness of the main body part, the connecting part can withstand greater force, so that the constraint member can provide greater constraint force to the two limiting beams arranged opposite to each other along the first direction to reinforce the limiting beams, so that the limiting beams can better withstand the force caused by the expansion of the battery monomers, which is beneficial to the lightweight of the limiting beams, thereby reducing the weight of the battery device. By clamping the insulating pressing strip between the main body part and the battery monomer, not only can the main body part apply force to the battery monomer through the insulating pressing strip to position the battery monomer, but also the insulating pressing strip can insulate and isolate the belt body and the battery monomer.

[0007] According to the battery device provided by some embodiments of the present application, the constraint member comprises a belt body and a pad, the belt body comprises a main body part and a fixing part, and the main body part is connected with the fixing part at both ends in the first direction; the fixing part and the pad are stacked and connected in the thickness direction of the belt body, and the connecting part comprises the fixing part and the pad.

[0008] The fixing part and the cushion block are stacked and connected along the thickness direction of the belt body, the thickness of the connecting part formed by the fixing part and the cushion block is increased, the structural strength of the connecting part is improved, the connecting part can exert greater constraint force on the limiting beam, and the limiting beam can be better reinforced by the constraint member.

[0009] According to the battery device provided by some embodiments of the application, the cushion block is connected to the fixing part by welding. By welding the cushion block to the fixing part, the material of the cushion block can be melted together with the material of the fixing part, which is beneficial to improving the connection strength of the cushion block and the fixing part and improving the structural strength of the connecting part composed of the cushion block and the fixing part.

[0010] According to the battery device provided by some embodiments of the application, the connecting part is provided with a connecting hole penetrating through the connecting part along the thickness direction of the connecting part; and the battery device further comprises a connecting member penetrating through the connecting hole and connecting the limiting beam and the connecting part, so that the connecting part can exert force on the limiting beam by exerting force on the connecting member.

[0011] According to the battery device provided by some embodiments of the application, the connecting hole is configured as a through hole, and the connecting member is connected to the limiting beam by threads. By configuring the connecting hole as a through hole and connecting the connecting member to the limiting beam by threads, when the connection between the connecting member and the limiting beam is affected by vibration and other factors and the torque is lost, the influence of the connecting member on the connecting part is small.

[0012] According to the battery device provided by some embodiments of the application, the surface of the insulating strip facing the main part is inwardly recessed to form a positioning groove, and at least part of the main part is located in the positioning groove and abuts against the bottom surface of the positioning groove, so that at least part of the main part can be limited in the positioning groove and is not easy to fall out of the positioning groove, which is beneficial to improving the mutual stability of the positions between the belt body and the insulating strip.

[0013] According to the battery device provided by some embodiments of the application, the constraint member further comprises an insulating sleeve sleeved and connected to the outer periphery of the main part, and the insulating strip is attached to the outer surface of the insulating sleeve. By sleeving and connecting the insulating sleeve to the outer periphery of the main part, the insulating sleeve can cover the main part, reducing the possibility of electrical connection between the main part and external devices.

[0014] According to the battery device provided by some embodiments of the application, the insulating sleeve is configured as a heat shrink tube. By configuring the insulating sleeve as a heat shrink tube, the connection of the insulating sleeve on the main part is facilitated, which is beneficial to improving the assembly effect of the strip.

[0015] According to some embodiments of the battery device provided in this application, a reinforcing rib is provided on the side of the connecting portion away from the limiting beam. By providing a reinforcing rib on the side of the connecting portion away from the limiting beam, not only can the structural strength of the connecting portion be improved, allowing the connecting portion to apply a greater restraining force to the limiting beam to reinforce it, which is beneficial to reducing the thickness of the limiting beam and making the limiting beam lighter, but also makes it less likely for the reinforcing rib to interfere with the connection between the connecting portion and the limiting beam.

[0016] According to some embodiments of the present application, the battery device further includes a buffer member connected to the side of the main body away from the battery cell. By providing a buffer member on the side of the main body away from the battery cell, the buffer member can absorb the force transmitted from the housing, reducing the impact and collisions on the restraint members.

[0017] According to some embodiments of this application, the battery device includes a housing body and a cover body. A limiting beam and a battery cell assembly are housed within the housing body body. The cover body is connected to the housing body body. A buffer is located between the cover body and the housing body body, so that the buffer can protect the housing body body while also improving the cover body's resistance to pressure.

[0018] According to some embodiments of the present application, the battery device further includes a bending portion connected between the main body and the connecting portion, and the bending portion bends relative to the main body toward the limiting beam.

[0019] According to some embodiments of this application, the battery device includes a fixing seat, which is fixed to a limiting beam, and a connecting portion is connected to the fixing seat. By providing a fixing seat on the limiting beam and connecting the connecting portion to the fixing seat on the limiting beam, the robustness of the connection between the connecting portion and the limiting beam is improved.

[0020] According to some embodiments of the battery device provided in this application, the limiting beam extends along a second direction, which is perpendicular to the first direction; the housing also includes a support beam connected to the limiting beam on the side away from the battery cell, and the support beam extends along the first direction. The support beam can support and fix the limiting beam from the side of the limiting beam away from the battery cell, reducing the possibility of interference between the support beam and the battery cell.

[0021] According to some embodiments of this application, the battery device has a first cavity and a second cavity, the first cavity being located between two limiting beams, and the battery cell assembly being located in the first cavity; the battery device also includes a control module located in the second cavity, such that the control module and the battery cells in the battery device are housed separately.

[0022] According to some embodiments of the present application, the battery device has a second cavity located on one side of the first cavity in a first direction, and a support beam is disposed in the second cavity and divides the second cavity into at least two receiving areas, so that the control module can be stored in the second cavity in separate sections.

[0023] According to some embodiments of the present application, the control module of the battery device is connected to the support beam, which makes the position of the control module in the housing stable.

[0024] Secondly, some embodiments of this application provide an electrical device that includes the battery device provided by the above-described technical solution, the battery device being used to provide electrical energy.

[0025] The technical solutions provided by the embodiments of this disclosure have at least the following beneficial effects:

[0026] This application provides a battery device including a housing, a battery cell assembly, a constraint member, and an insulating strip. The housing includes multiple limiting beams arranged opposite each other along a first direction. The battery cell assembly is disposed between two adjacent limiting beams and includes multiple battery cells arranged along the first direction. The constraint member includes a main body and a connecting part. The main body has connecting parts at both ends in the first direction, and the thickness of the connecting part is greater than the thickness of the main body. The connecting parts are connected to the limiting beams, and at least part of the insulating strip is clamped between the main body and the battery cells. In the above structure, because the thickness of the connecting part connected to the limiting beams in the constraint member is set to be greater than the thickness of the main body, the connecting part can withstand greater forces. This allows the constraint member to provide greater constraint force to the two limiting beams arranged opposite each other along the first direction to reinforce the limiting beams, enabling the limiting beams to better withstand the forces caused by the expansion of the battery cells. This is beneficial for the lightweighting of the limiting beams, thereby reducing the weight of the battery device.

[0027] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0028] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0029] Figure 1 These are schematic diagrams of the vehicle structure provided in some embodiments of this application;

[0030] Figure 2 This is a exploded view of a battery device provided in some embodiments of this application;

[0031] Figure 3 This is a schematic diagram of the structure of the battery device provided in some embodiments of this application after the constraint members, insulating strips and buffer members are connected from one view.

[0032] Figure 4 This is a schematic diagram of the structure of the battery device provided in some embodiments of this application after the constraint members, insulating strips and buffer members are connected, from another perspective.

[0033] Figure 5 This is a cross-sectional view of a portion of the structure of the constraint member in a battery device provided in some embodiments of this application;

[0034] Figure 6 This is a partial structural diagram of the internal structure of a battery device provided in some embodiments of this application.

[0035] In the attached diagram:

[0036] 1. Vehicle; 2. Battery unit; 3. Controller; 4. Motor; 5. Housing; 5a. First housing section; 5b. Second housing section; 5c. Accommodation space; 7. Battery cell; 103. Housing body; 11. Limiting beam; 111. Fixing seat; 12. Support beam; 13. First cavity; 14. Second cavity; 20. Battery cell assembly;

[0037] 30. Constraint component; 31. Belt body; 311. Main body; 312. Fixing part; 313. Bending part; 32. Pad; 33. Connecting part; 331. Connecting hole; 34. Insulating sleeve;

[0038] 40. Insulating strip; 41. Positioning groove; 50. Buffer component;

[0039] X, the first direction; Y, the second direction. Detailed Implementation

[0040] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0041] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by those skilled in the art to which the embodiments of this application pertain.

[0042] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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. Therefore, they should not be construed as limitations on the embodiments of this application.

[0043] Furthermore, technical terms such as "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 indicated. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0044] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0045] In the description of the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. As the application areas of battery devices continue to expand, the requirements for battery devices are also constantly increasing.

[0047] The battery device mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity.

[0048] 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.

[0049] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0050] 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.

[0051] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0052] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0053] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0054] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0055] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0056] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0057] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0058] Among them, the battery cell can be a secondary battery cell, 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.

[0059] Battery cells can be lithium-ion cells, sodium-ion cells, sodium-lithium-ion cells, lithium metal cells, sodium metal cells, lithium-sulfur cells, magnesium-ion cells, nickel-metal hydride cells, nickel-cadmium cells, lead-acid cells, etc.

[0060] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0061] In some embodiments, the battery device may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0062] Typically, a battery pack includes a housing, individual battery cells, a high-voltage box, a control module, connecting high-voltage copper bars, wiring harnesses, and external connectors. The housing forms a cavity to hold the individual battery cells, and a limiting beam is installed on the portion facing the large surface of the battery cells. This beam is used to withstand the forces exerted by the expansion and deformation of the battery cells during cyclic charging and discharging. As the demand for battery capacity continues to increase, the number of battery cells in the pack is also increasing. To enable the limiting beam to withstand the expansion forces of more battery cells, the thickness of the limiting beam in the housing is increasing, which is detrimental to the lightweight design of the battery pack, making it heavier.

[0063] To reduce the weight of the battery device, some embodiments of this application provide a battery device including a housing, a battery cell assembly, a constraint member, and an insulating strip. The housing includes a plurality of limiting beams arranged opposite each other along a first direction. The battery cell assembly is disposed between two adjacent limiting beams and includes a plurality of battery cells arranged along the first direction. The constraint member includes a main body and a connecting part. The main body has connecting parts at both ends in the first direction. The thickness of the connecting part is greater than the thickness of the main body. The connecting part is connected to the limiting beams. At least part of the insulating strip is clamped between the main body and the battery cells. In the above structure, because the thickness of the connecting part connected to the limiting beams in the constraint member is set to be greater than the thickness of the main body, the connecting part can withstand greater forces. This allows the constraint member to provide greater constraint force to the two limiting beams arranged opposite each other along the first direction to reinforce the limiting beams. This enables the limiting beams to better withstand the forces caused by the expansion of the battery cells, which is beneficial for the lightweighting of the limiting beams, thereby reducing the weight of the battery device.

[0064] The battery device described in the embodiments of this application is applicable to electrical devices that use battery devices.

[0065] 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. Because this electrical device includes the battery device provided by the above-mentioned technical solution, it has good reliability.

[0066] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0067] Figure 1 The diagram shows the structural features of a vehicle provided in some embodiments of this application.

[0068] like Figure 1 As shown, a battery device 2 is installed inside the vehicle 1. The battery device 2 can be located at the bottom, front, or rear of the vehicle 1. The battery device 2 can be used to power the vehicle 1; for example, the battery device 2 can serve as the operating power source for the vehicle 1.

[0069] The vehicle 1 may also include a controller 3 and a motor 4. The controller 3 is used to control the battery device 2 to supply power to the motor 4, for example, for the power needs of the vehicle 1 during starting, navigation and driving.

[0070] In some embodiments of this application, the battery device 2 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0071] Figure 2 This is a exploded view of a battery device provided in some embodiments of this application. For example... Figure 2 As shown, the battery device 2 includes a housing 5 and battery cells 7, with the battery cells 7 housed within the housing 5. The battery cell 7 can be the smallest unit that makes up a battery.

[0072] The housing 5 is used to house the battery cell 7, and the housing 5 can have various structures. In some embodiments, the housing 5 may include a first housing portion 5a and a second housing portion 5b, which overlap each other, and together define a housing space 5c for housing the battery cell 7. The second housing portion 5b may be a hollow structure with one end open, and the first housing portion 5a may be a plate-like structure, with the first housing portion 5a covering the open side of the second housing portion 5b to form a housing 5 with the housing space 5c; alternatively, both the first housing portion 5a and the second housing portion 5b may be hollow structures with one side open, with the open side of the first housing portion 5a covering the open side of the second housing portion 5b to form a housing 5 with the housing space 5c. Of course, the first housing portion 5a and the second housing portion 5b can be various shapes, such as cylinders, cuboids, etc.

[0073] To improve the sealing performance after the first housing part 5a and the second housing part 5b are connected, a sealing element, such as sealant or sealing ring, can also be provided between the first housing part 5a and the second housing part 5b.

[0074] Assuming that the first box part 5a covers the top of the second box part 5b, the first box part 5a can also be called the upper box cover, and the second box part 5b can also be called the lower box 5.

[0075] Some embodiments of this application provide a battery device 2, which includes a housing 5, a battery cell assembly 20, a restraining member 30, and an insulating strip 40. The housing 5 includes a plurality of limiting beams 11 arranged opposite each other along a first direction X. The battery cell assembly 20 is disposed between two adjacent limiting beams 11, and the battery cell assembly 20 includes a plurality of battery cells 7 arranged along the first direction X. (Reference) Figure 3 , Figure 4 and Figure 5The constraint member 30 includes a main body 311 and a connecting part 33. The main body 311 is provided with connecting parts 33 at both ends in the first direction X. The thickness of the connecting part 33 is greater than the thickness of the main body 311. The connecting part 33 is connected to the limiting beam 11. At least part of the insulating pressure strip 40 is clamped between the main body 311 and the battery cell 7.

[0076] The housing 5 can be the outer shell structure of the battery device 2, which forms a cavity to accommodate other components in the battery device 2, so as to protect the other devices in the battery device 2. The battery cell assembly 20 can be an assembly composed of multiple battery cells 7, wherein the multiple battery cells 7 can be connected in series, parallel or mixed connection through a busbar component.

[0077] The battery cell assembly 20 includes a plurality of battery cells 7 arranged along a first direction X, which may mean that at least some of the battery cells 7 in the battery cell assembly 20 are arranged along the first direction X between two limiting beams 11.

[0078] By placing the battery cell assembly 20 between two adjacent limiting beams 11, the two adjacent limiting beams 11 are able to withstand the expansion force of the battery cell 7 in the battery cell assembly 20 in the first direction X.

[0079] The constraint member 30 can be a component used to connect two adjacent limiting beams 11 and to constrain the two limiting beams 11 from moving away from each other in the first direction X. When the two limiting beams 11 are subjected to the expansion force of the battery cell 7 in the first direction X and have a tendency to move away from each other, it can apply a constraint force to the two limiting beams 11 to strengthen them, so that the limiting beams 11 can better withstand the force brought about by the expansion of the battery cell 7.

[0080] The main body 311 can be the main structure in the constraint member 30. The main body 311 can extend along the first direction X, so that the main body 311 can limit the multiple battery cells 7 arranged along the first direction X, so that the battery cells 7 are not easily displaced when they fall off the housing 5, which helps to reduce the possibility of short circuit of the battery cells 7 and improves the reliability of the battery device 2.

[0081] The connecting part 33 can be a structure in the constraint member 30 used to connect with the limiting beam 11. By providing connecting parts 33 at both ends of the main body part 311 in the first direction X, the constraint member 30 can be connected to the limiting beam 11 at both ends of the first direction X through the connecting parts 33. This allows the two limiting beams 11 arranged opposite each other in the first direction X to be constrained by the constraint member 30. The constraint member 30 can reinforce the limiting beams 11, enabling the limiting beams 11 to withstand the force caused by the expansion of the battery cell 7.

[0082] By setting the thickness of the connecting part 33 to be greater than the thickness of the main body 311, the structural strength of the connecting part 33 is greater than that of the main body 311. The connection between the connecting part 33 and the limiting beam 11 is not easy to detach. The constraint member 30 can provide greater constraint force for the limiting beam 11, so that the limiting beam 11 can better withstand the force brought by the expansion of the battery cell 7. This allows the limiting beam 11 to withstand the expansion force of the battery cell 7 in the battery cell assembly 20 in the first direction X with a thinner thickness.

[0083] The insulating strip 40 may be a component disposed on the outside of the constraint member 30, which is used to insulate the constraint member 30 from the battery cell 7.

[0084] The insulating strip 40 can be a long strip-shaped component made of insulating material. By extending the insulating strip 40 along the first direction X, the insulating strip 40 can extend along the extension direction of the main body 311, making it easier for the insulating strip 40 to be clamped between the main body 311 and the battery cell 7.

[0085] By clamping at least a portion of the insulating strip 40 between the main body 311 and the battery cell 7, the main body 311 can apply force to the battery cell 7 through the insulating strip 40 to limit the battery cell 7, and the insulating strip 40 can also insulate and isolate the strip 31 and the battery cell 7.

[0086] For example, the insulating strip 40 may include a thermoplastic composite material or mica paper. The thermoplastic composite material is a composite material composed of thermoplastic resin and reinforcing materials (such as glass fiber, carbon fiber, etc.). Mica paper may refer to paper made from mica through processing. By including a thermoplastic composite material or mica paper in the insulating strip 40, the insulating strip 40 not only has good insulation properties but also a high melting point.

[0087] In the above structure, since the thickness of the connecting part 33 in the constraint member 30 that connects to the limiting beam 11 is set to be greater than the thickness of the main body part 311, the connecting part 33 can withstand greater force, and the constraint member 30 can provide greater constraint force to the two limiting beams 11 that are arranged opposite to each other along the first direction X to strengthen the limiting beams 11. This allows the limiting beams 11 to better withstand the force brought about by the expansion of the battery cell 7, which is beneficial to the lightweighting of the limiting beams 11, thereby reducing the weight of the battery device 2.

[0088] In some embodiments, continue to refer to Figure 5The constraint member 30 includes a belt body 31 and a pad 32. The belt body 31 includes a main body 311 and a fixing part 312. The fixing part 312 is connected to both ends of the main body 311 along the first direction X. The fixing part 312 and the pad 32 are stacked and connected along the thickness direction of the belt body 31. The connecting part 33 includes the fixing part 312 and the pad 32.

[0089] The belt body 31 may be a strip-shaped member in the constraint member 30, extending along the first direction X. The pad 32 may be a member in the constraint member 30 used to increase the thickness. The main body 311 and the fixing part 312 are two interconnected parts of the belt body 31, wherein the fixing part 312 is connected to the end of the main body 311 in the first direction X. Exemplarily, the thickness of the main body 311 and the thickness of the fixing part 312 are equal.

[0090] The fixing part 312 and the pad 32 are stacked and connected along the thickness direction of the belt body 31. Specifically, the pad 32 can be connected to the side of the fixing part 312 in the thickness direction, so that the pad 32 and the fixing part 312 are stacked. By stacking and connecting the fixing part 312 and the pad 32 along the thickness direction of the belt body 31, the thickness of the connecting part 33 formed by the fixing part 312 and the pad 32 is increased, improving the structural strength of the connecting part 33. This allows the connecting part 33 to apply a greater restraining force to the limiting beam 11, and the limiting beam 11 can be better reinforced by the restraining member 30.

[0091] For example, the pad 32 can be connected to the fixing part 312 by welding, bonding or other means.

[0092] In some embodiments, the pad 32 is welded to the fixing part 312.

[0093] By welding the pad 32 to the fixing part 312, the material of the pad 32 can be fused together with the material of the fixing part 312. This not only helps to improve the connection strength between the pad 32 and the fixing part 312, but also helps to improve the structural strength of the connection part 33 composed of the pad 32 and the fixing part 312.

[0094] In some embodiments, the connecting portion 33 is provided with a connecting hole 331, which penetrates the connecting portion 33 along the thickness direction of the connecting portion 33; the battery device 2 also includes a connector, which passes through the connecting hole 331 and connects the limiting beam 11 and the connecting portion 33.

[0095] The connecting hole 331 can be a hole-like structure provided on the connecting part 33, which is used to connect the connecting part 33 and the limiting beam 11. The connecting hole 331 penetrates the connecting part 33 along the thickness direction of the connecting part 33, which means that the connecting hole 331 is set as a through hole and penetrates the connecting part 33 along the thickness direction of the connecting part 33, so that a connector can be inserted through the connecting hole 331, and the connecting part 33 can apply a force to the limiting beam 11 by applying a force to the connector.

[0096] The connector can be a component used to connect the connecting part 33 and the limiting beam 11. The connector passes through the connecting hole 331 and connects the limiting beam 11 and the connecting part 33. Alternatively, a portion of the connector may pass through the connecting hole 331, and a portion of the connector extending out of the connecting hole 331 may be connected to the limiting beam 11.

[0097] For example, the connector can be a rivet, which passes through the connecting hole 331 and is riveted to the limiting beam 11; the connector can also be a connecting bolt, which passes through the connecting hole 331 and is locked to the limiting beam 11.

[0098] In some embodiments, the connection hole 331 is configured as a smooth hole, and the connector is connected to the limiting beam 11 by threads.

[0099] A smooth hole refers to a hole with a smooth inner wall surface and no threads. The connector is connected to the limiting beam 11 by threads, which means that the part of the connector extending from the connecting hole 331 is connected to the limiting beam 11 by screwing on the threads, making the connection between the connector and the limiting beam 11 convenient.

[0100] By configuring the connecting hole 331 as a smooth hole, the connector is connected to the limiting beam 11 by threads, so that when the connection between the connector and the limiting beam 11 loses torque due to factors such as vibration, the influence of the connector on the connecting part 33 is small.

[0101] In some embodiments, continue to refer to Figure 3 and Figure 4 The insulating strip 40 is recessed inward on the surface of the main body 311 to form a positioning groove 41, and at least part of the main body 311 is located in the positioning groove 41 and abuts against the bottom surface of the positioning groove 41.

[0102] The positioning groove 41 can be a groove structure used to position the tape body 31 and the insulating strip 40. By providing at least a portion of the main body 311 in the positioning groove 41 and abutting against the bottom surface of the positioning groove 41, at least a portion of the main body 311 can be confined in the positioning groove 41 and is not easy to come out of the positioning groove 41, which helps to improve the mutual stability of the positions between the tape body 31 and the insulating strip 40.

[0103] In some embodiments, the constraint member 30 further includes an insulating sleeve 34, which is sleeved and connected to the outer periphery of the main body 311, and an insulating strip 40 is attached to the outer surface of the insulating sleeve 34.

[0104] The insulating sleeve 34 can be a sleeve-shaped component with insulating properties. By sleeved and connected to the outer periphery of the main body 311, the insulating sleeve 34 can cover the main body 311, reducing the possibility of electrical connection between the main body 311 and external devices.

[0105] The insulating strip 40 is attached to the outer surface of the insulating sleeve 34. This means that the strip 31 abuts against the insulating strip 40 through the insulating sleeve 34 on the outer periphery of the main body 311, which helps to further improve the insulation effect between the main body 311 and the battery cell 7.

[0106] In some embodiments, the insulating sleeve 34 is configured as a heat shrink tubing.

[0107] Heat shrink tubing is a polymer material sleeve that shrinks upon heating. By configuring the insulating sleeve 34 as heat shrink tubing, the connection of the insulating sleeve 34 to the main body 311 is convenient, which helps to improve the assembly effect of the pressure strip.

[0108] In some embodiments, the connecting portion 33 is provided with a reinforcing rib on the side away from the limiting beam 11.

[0109] By providing a reinforcing rib on the side of the connecting part 33 away from the limiting beam 11, the structural strength of the connecting part 33 can be improved, allowing the connecting part 33 to apply a greater constraint force to the limiting beam 11 to strengthen the limiting beam 11. This is beneficial for reducing the thickness of the limiting beam 11 and making the limiting beam 11 lighter. It also makes it less likely that the reinforcing rib will interfere with the connection between the connecting part 33 and the limiting beam 11.

[0110] In some embodiments, the battery device 2 further includes a buffer 50, which is connected to the side of the main body 311 away from the battery cell 7.

[0111] The buffer 50 can be a component used to buffer the impact and bumps that the housing 5 brings to the constraint member 30. By providing the buffer 50 on the side of the main body 311 away from the battery cell 7, the buffer 50 can absorb the force transmitted from the housing 5, thereby reducing the impact and bumps on the constraint member 30.

[0112] For example, the buffer 50 can be made of elastic materials such as sponge or rubber, so that the buffer 50 connected to the side of the main body 311 away from the battery cell 7 can absorb the impact and bumps on the restraint member 30 by its own elastic restoring force.

[0113] In some embodiments, the housing 5 includes a housing body 103 and a cover (not shown in the figure), a limiting beam 11 and a battery cell assembly 20 are housed within the housing body 103, the cover is connected to the housing body 103, and a buffer 50 is located between the cover and the housing body 311.

[0114] The main body 103 and the cover are two interconnected parts of the box 5. After they are connected, they protect the battery cells 7, high voltage box, control module, high voltage copper bars, wiring harness and external connectors located in the box 5.

[0115] The main body 103 can be the first box part 5a of the aforementioned scheme, and the cover is the second box part 5b that covers the first box part 5a in the aforementioned scheme.

[0116] By accommodating the limiting beam 11 and the battery cell assembly 20 within the box body 103, the limiting beam 11 and the battery cell assembly 20 can be located within the box body 5 when the cover is connected to the box body 103.

[0117] The buffer 50 is located between the cover and the main body 311. This can mean that the buffer 50 is sandwiched between the cover and the main body 311, so that the buffer 50 can protect the main body 311 while also improving the cover's resistance to pressure. Alternatively, the buffer 50 can mean that it is located between the cover and the main body 311 and is spaced apart from the cover.

[0118] In some embodiments, the belt 31 further includes a bending portion 313, which is connected between the main body portion 311 and the connecting portion 33, and the bending portion 313 bends toward the limiting beam 11 relative to the main body portion 311.

[0119] The bending portion 313 can be a structure in the belt body 31 that connects the main body portion 311 and the connecting portion 33. The bending portion 313 is connected to the main body portion 311 and the fixing portion 312, so that the main body portion 311, the bending portion 313 and the fixing portion 312 are connected to form the belt body 31.

[0120] By bending the bent portion 313 toward the limiting beam 11 relative to the main body portion 311, the connecting portion 33 connected to the bent portion 313 can be brought closer to the limiting beam 11, which facilitates the connection between the connecting portion 33 and the limiting beam 11.

[0121] For example, the main body 311, the bending part 313 and the fixing part 312 are integrally formed, so that the belt 31 is an integral component with strong overall structural strength.

[0122] For example, the belt 31 can be a steel belt, which allows the belt 31 to apply a greater restraining force to the limiting beam 11, which is beneficial to improving the reinforcement effect of the restraining member 30 on the limiting beam 11.

[0123] In some embodiments, reference Figure 6 The battery device 2 includes a fixing seat 111, which is fixed to the limiting beam 11, and a connecting part 33 is connected to the fixing seat 111.

[0124] The fixing seat 111 can be a seat structure provided on the limiting beam 11 for connecting with the connecting part 33. By providing the fixing seat 111 on the limiting beam 11 and connecting the connecting part 33 to the fixing seat 111 of the limiting beam 11, it is beneficial to improve the firmness of the connection between the connecting part 33 and the limiting beam 11.

[0125] In some embodiments, the limiting beam 11 extends along a second direction Y, which is perpendicular to the first direction X; the housing 5 also includes a support beam 12, which is connected to the side of the limiting beam 11 away from the battery cell 7, and extends along the first direction X.

[0126] The second direction Y can be a direction perpendicular to the first direction X. The fact that the limiting beam 11 extends along the second direction Y means that the extension direction of the limiting beam 11 is the second direction Y, so that the limiting beam 11 can limit the number of battery cells 7 in the box 5.

[0127] The support beam 12 can be a beam structure installed on the box body 5, which is used to support and reinforce the limiting beam 11. The support beam 12 is connected to the side of the limiting beam 11 away from the battery cell 7. This means that the support beam 12 is located on the side of the limiting beam 11 away from the battery cell 7 and is connected to the limiting beam 11, so that the support beam 12 can support and fix the limiting beam 11 from the side of the limiting beam 11 away from the battery cell 7, reducing the possibility of interference between the support beam 12 and the battery cell 7.

[0128] The extension of the support beam 12 along the first direction X can mean that the extension direction of the support beam 12 is the first direction X, and the end of the support beam 12 in the first direction X is connected to the side of the limiting beam 11 away from the battery cell 7.

[0129] In some embodiments, the housing 5 has a first cavity 13 and a second cavity 14, the first cavity 13 being located between two limiting beams 11, and a plurality of battery cells 7 being located in the first cavity 13; the battery device 2 also includes a control module (not shown in the figure), the control module being located in the second cavity 14.

[0130] The first cavity 13 and the second cavity 14 are different cavity structures within the housing 5, both used to store components of the battery device 2. The first cavity 13 houses the individual battery cells 7, and the battery cell assembly 20 of the battery device 2 is located within the first cavity 13. The second cavity 14 houses the control module, and the control module of the battery device 2 is located within the first cavity 13, thus separating the control module from the individual battery cells 7 within the battery device 2.

[0131] For example, the second cavity 14 may be disposed outside the first cavity 13 in the first direction X, and the second cavity 14 may also be disposed outside the first cavity 13 in the second direction Y.

[0132] For example, the control module may include a battery management unit and a battery cell monitoring circuit.

[0133] In some embodiments, the second cavity 14 is located on one side of the first cavity 13 in the first direction X, and the support beam 12 is disposed in the second cavity 14 and divides the second cavity 14 into at least two receiving areas.

[0134] By placing the second cavity 14 on one side of the first cavity 13 in the first direction X, and placing the support beam 12 in the second cavity 14, the support beam 12 can support the limiting beam 11 from the outside of the limiting beam 11 away from the battery cell 7 in the second cavity 14.

[0135] The support beam 12, by being disposed in the second cavity 14, can divide the second cavity 14 into at least two receiving areas, so that the control module can be stored in the second cavity 14 in separate areas.

[0136] In some embodiments, the control module is connected to the support beam 12.

[0137] The connection of the control module to the support beam 12 can mean that the control module is connected to the support beam 12 by connecting bolts, rivets or other connecting parts, or it can mean that the control module is connected to the support beam 12 by adhesive, welding or other means, so that the control module is placed in the housing 5 with a stable position.

[0138] Some embodiments of this application also provide an electrical device, which includes a battery device 2 provided by any of the above technical solutions, the battery device 2 being used to provide electrical energy.

[0139] Some embodiments of this application provide a battery device 2, which includes a housing 5, a battery cell assembly 20, a restraint member 30, an insulating strip 40, a buffer member 50, and a control module. The housing 5 includes a main body 103 and a cover. The main body 103 includes a support beam 12 and two limiting beams 11 arranged opposite each other along a first direction X. The main body 103 has a first cavity 13 and a second cavity 14 arranged along the first direction X. The first cavity 13 is located between the two limiting beams 11, and the battery cell assembly 20 is located in the first cavity. In cavity 13, support beam 12 is located in second cavity 14 and connected to limiting beam 11. The main body 311 of constraint member 30 presses insulating strip 40 onto battery cell 7. In constraint member 30, pad 32 is welded to fixing part 312 connected to both ends of the main body 311 in the first direction X to form connecting part 33. Connecting part 33 is connected to limiting beam 11 by connecting member through thread. Cover is connected to box body 103 and covers first cavity 13 and second cavity 14. Buffer member 50 is clamped between cover and main body 311.

[0140] In the above structure, since the thickness of the connecting part 33 in the constraint member 30 that connects to the limiting beam 11 is set to be greater than the thickness of the main body part 311, the connecting part 33 can withstand greater force, and the constraint member 30 can provide greater constraint force to the two limiting beams 11 that are arranged opposite to each other along the first direction X to strengthen the limiting beams 11. This allows the limiting beams 11 to better withstand the force brought about by the expansion of the battery cell 7, which is beneficial to the lightweighting of the limiting beams 11, thereby reducing the weight of the battery device 2.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises: a box body comprising a plurality of limiting beams arranged oppositely along a first direction; a battery cell assembly arranged between two adjacent limiting beams, the battery cell assembly comprising a plurality of battery cells arranged along the first direction; a restraint member comprising a main body portion and a connecting portion, the main body portion being provided with the connecting portion at both ends along the first direction, the connecting portion having a thickness greater than that of the main body portion, and the connecting portion being connected to the limiting beam; an insulating pressing strip, at least part of which is clamped between the main body portion and the battery cell.

2. The battery device according to claim 1, characterized by The restraint member comprises a belt body and a pad, the belt body comprising the main body portion and a fixing portion, the main body portion being connected with the fixing portion at both ends along the first direction; The fixing portion and the pad are stacked and connected along the thickness direction of the belt body, and the connecting portion comprises the fixing portion and the pad.

3. The battery device of claim 2, wherein The pad is connected to the fixing portion by welding.

4. The battery device of claim 2, wherein The belt body further comprises a bending portion connected between the main body portion and the connecting portion, and the bending portion is bent towards the limiting beam relative to the main body portion.

5. The battery device of claim 1, wherein The connecting portion is provided with a connecting hole penetrating through the connecting portion along the thickness direction of the connecting portion; and the battery device further comprises a connecting member penetrating through the connecting hole and connecting the limiting beam and the connecting portion.

6. The battery device of claim 5, wherein The connecting hole is configured as a light hole, and the connecting member is connected to the limiting beam through threads.

7. The battery device of claim 1, wherein The surface of the insulating pressing strip towards the main body portion is inwardly recessed to form a positioning groove, and at least part of the main body portion is located in the positioning groove and abuts against the bottom surface of the positioning groove.

8. The battery device of claim 1, wherein The restraint member further comprises an insulating sleeve sleeved and connected to the outer periphery of the main body portion, and the insulating pressing strip is attached to the outer surface of the insulating sleeve.

9. The battery device of claim 8, wherein, The insulating sleeve is configured as a heat-shrinkable tube.

10. The battery device of claim 1, wherein The side of the connecting portion away from the limiting beam is provided with a reinforcing rib.

11. The battery device of claim 1, wherein The battery device further comprises a buffer member connected to the side of the main body portion away from the battery cell.

12. The battery device of claim 11, wherein, The box body comprises a box main body and a cover, the limiting beam and the battery cell assembly are accommodated in the box main body, the cover is connected to the box main body, and the buffer member is located between the cover and the main body portion.

13. The battery device of claim 1, wherein, The battery device comprises a fixing seat fixed to the limiting beam, and the connecting portion is connected to the fixing seat.

14. The battery device of claim 1, wherein, The limiting beam extends along a second direction perpendicular to the first direction; and the box body further comprises a supporting beam connected to the side of the limiting beam away from the battery cell and extending along the first direction.

15. The battery device of claim 14, wherein, The box body has a first accommodating cavity and a second accommodating cavity, the first accommodating cavity is located between two limiting beams, and the battery cell assembly is located in the first accommodating cavity; and the battery device further comprises a control module located in the second accommodating cavity.

16. The battery device of claim 15, wherein, The second accommodating cavity is located on one side of the first accommodating cavity along the first direction, and the supporting beam is arranged in the second accommodating cavity and divides the second accommodating cavity into at least two accommodating areas.

17. The battery device of claim 15, wherein, The control module is connected to the supporting beam.

18. An electrical device, comprising: A battery device as claimed in any one of claims 1-17 for providing electrical energy.

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