Battery device and electric equipment

Abstract

The embodiment of the utility model provides a battery device and electric equipment, and relates to the technical field of batteries. Comprising a battery box body and a battery monomer installed in the battery box body, the battery box body comprises a first wall and a second wall which are opposite, the battery device comprises a middle part and side parts located on the two sides of the middle part, the middle part is provided with a first connecting structure, and the first connecting structure penetrates through the first wall, an inner cavity of the battery box body and the second wall. The battery device is connected with the electric equipment through the first connecting structure, so that the overall structure of the battery device on the middle part can be connected with the electric equipment, the connection stability of the battery device on the middle part and the electric equipment is improved, the possibility that the middle part of the battery device resonates when the electric equipment vibrates is reduced, and the service life of the battery device is prolonged. Therefore, the structural stability and reliability of the battery device are improved.

Description

Technical Field

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

[0002] Battery devices are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc.

[0003] As the size and weight of battery devices increase, improving the connection stability between battery devices and electrical equipment is a research direction in battery technology. Utility Model Content

[0004] This application provides a battery device and an electrical device that can improve the connection stability between the battery device and the electrical device.

[0005] In a first aspect, embodiments of this application provide a battery device, including a battery housing and battery cells installed within the battery housing. The battery housing includes a first wall and a second wall opposite to each other, and a side wall connecting the first wall and the second wall. The first wall, the second wall, and the side wall together form the inner cavity of the battery housing. Along a first direction intersecting the arrangement direction of the first wall to the second wall, the battery device includes a central portion and side portions located on both sides of the central portion. The dimension of the central portion along the first direction is greater than or equal to the dimension of each side portion along the first direction. The central portion is provided with at least one first connecting structure, which penetrates the first wall, the inner cavity, and the second wall, and is used to connect electrical equipment.

[0006] By adopting the above technical solution, a first connecting structure is provided in the middle part of the battery device. The first connecting structure passes through the first wall, the inner cavity of the battery device and the second wall. The electrical equipment is connected through the first connecting structure, so that the overall structure of the battery device in the middle part can be connected with the electrical equipment. This improves the connection stability between the battery device and the electrical equipment in the middle part and reduces the possibility of resonance in the middle part of the battery device when the electrical equipment vibrates, thereby improving the structural stability and reliability of the battery device.

[0007] In some embodiments of this application, the first connection structure includes a first connection portion disposed on the first wall and a second connection portion disposed on the second wall, wherein the first connection portion and the second connection portion are aligned along a second direction, the second direction being the arrangement direction from the first wall to the second wall.

[0008] By adopting the above technical solution, the first connection structure is designed to include a first connection part on the first wall of the battery box and a second connection part on the second wall, so that both walls of the battery box can be connected to the electrical equipment, thereby improving the connection stability between the battery box and the electrical equipment.

[0009] In some embodiments of this application, the battery device further includes a heat exchanger located within the battery housing, the heat exchanger being connected to the first wall or the second wall, and the first connection structure including a third connection portion penetrating the heat exchanger, the third connection portion being located between the first connection portion and the second connection portion.

[0010] By adopting the above technical solution, the first connection structure is designed to include a third connection part located in the heat exchange component, so that the heat exchange component of the battery device can be connected to the electrical equipment, thereby improving the stability of the connection between the heat exchange component and the entire battery device and the electrical equipment.

[0011] In some embodiments of this application, the first connecting portion includes a first connecting hole, the second connecting portion includes a second connecting hole, and the third connecting portion includes a third connecting hole, wherein the third connecting hole is connected to the first connecting hole and the second connecting hole respectively.

[0012] By adopting the above technical solution, the first connecting part is designed to include a first connecting hole, the second connecting part is designed to include a second connecting hole, and the third connecting part is designed to include a third connecting hole. The electrical equipment is connected through the above connecting hole structure. The structure is simple and facilitates the processing and assembly of the battery device.

[0013] In some embodiments of this application, the first connection structure further includes a first connector, which is connected through the first connection hole, the second connection hole and the third connection hole, and is used to connect the electrical equipment.

[0014] By adopting the above technical solution, the first connection structure is designed to include a first connector, which mates with the first connection hole, the second connection hole and the third connection hole, so that the first connector is connected to the battery box and the water cooling plate as a whole. Then, the electrical equipment is connected through the first connector, which can improve the connection stability between the battery device and the electrical equipment.

[0015] In some embodiments of this application, the first connecting hole, the second connecting hole, and the third connecting hole are all oblong holes.

[0016] By adopting the above technical solution, the first connecting hole, the second connecting hole and the third connecting hole are designed as waist-shaped holes. The waist-shaped holes can facilitate the first connecting part to mate with the above connecting holes when there is a dimensional error in the first connecting part.

[0017] In some embodiments of this application, the first connector is a cylindrical member with open ends and a hollow interior. The first connection structure further includes a second connector, which passes through the first connector, and the first connector is connected to the electrical equipment through the second connector.

[0018] By adopting the above technical solution, the first connector is designed as a cylindrical part. The first connector is used to connect the first connecting hole, the second connecting hole and the third connecting hole, so that the battery box and the heat exchanger form an integral connection structure with through holes under the connection of the first connector. Then, the second connector is used to connect the first connector and the electrical equipment respectively, which can further improve the connection stability between the battery device and the electrical equipment.

[0019] In some embodiments of this application, the minimum diameter of the first connecting hole, the minimum diameter of the second connecting hole, and the minimum diameter of the third connecting hole are 10mm-50mm, respectively.

[0020] By adopting the above technical solution, the diameters of the first connecting hole, the second connecting hole, and the third connecting hole are designed to be 10mm-50mm, which reduces the negative impact on the structural strength of the battery box and the water-cooling plate, facilitates processing, and ensures that the hole diameters meet the connection strength requirements of the electrical equipment or the first connector.

[0021] In some embodiments of this application, the minimum diameter of the first connecting hole, the minimum diameter of the second connecting hole, and the minimum diameter of the third connecting hole are 15mm-30mm, respectively.

[0022] By adopting the above technical solution, the negative impact on the structural strength of the battery box and water-cooled plate can be further reduced, and the processing can be further facilitated. Moreover, the aperture can be made to meet the connection strength of the electrical equipment or the first connector.

[0023] In some embodiments of this application, the heat exchanger is provided with a heat exchange medium flow channel inside, and the heat exchange medium flow channel and the third connection portion are offset from each other in the second direction.

[0024] By adopting the above technical solution, the heat exchange medium flow channel and the third connection part of the heat exchanger are designed to be staggered in the second direction, so that the heat exchange medium flow channel avoids the third connection part and reduces the possibility of mutual influence between the two.

[0025] In some embodiments of this application, the minimum distance between the heat exchange medium channel and the third connection portion is greater than or equal to 5 mm.

[0026] By adopting the above technical solution, the minimum distance between the heat exchange medium flow channel and the third connection part is designed to be greater than or equal to 5mm, so that the heat exchange medium flow channel and the third connection part have a certain safe distance, further reducing the possibility of mutual influence between the third connection part and the heat exchange medium flow channel.

[0027] In some embodiments of this application, the minimum distance between the heat exchange medium channel and the third connection portion is less than or equal to 40 mm.

[0028] By adopting the above technical solution, the minimum distance between the heat exchange medium flow channel and the third connection part is designed to be less than or equal to 40mm, so that the safe distance between the heat exchange medium flow channel and the third connection part is not too large, thus reducing the number of heat exchange medium flow channels and reducing the negative impact of setting the third connection part on the water cooling efficiency of the heat exchanger.

[0029] In some embodiments of this application, the heat exchange medium channel has a clearance section facing the third connection portion, the clearance section being recessed in a direction away from the third connection portion.

[0030] By adopting the above technical solution, the heat exchange medium flow channel can avoid the third connection part by using the recess of the avoidance section. This can reduce the negative impact of setting the third connection part on the water cooling efficiency of the heat exchanger without changing the overall flow direction of the heat exchange medium flow channel.

[0031] In some embodiments of this application, the avoidance segment is an arc segment.

[0032] By adopting the above technical solution, the avoidance section is designed as an arc section. The side of the arc section facing the third connecting part is an arc surface. Along the circumference of the arc surface, the distance between the arc surface and the third connecting part is approximately equal, which makes it easier to control the distance between the avoidance section and the third connecting part.

[0033] In some embodiments of this application, the battery housing further includes a support beam connected between two opposing side walls, and the first connection structure includes a fourth connection portion passing through the support beam, the fourth connection portion being located between the first connection portion and the third connection portion.

[0034] By adopting the above technical solution, the battery box is designed to include a support beam, which can improve the structural strength and stability of the battery box. Furthermore, the first connection structure is designed to include a fourth connection part that runs through the support beam, and the support beam is also connected to the electrical equipment through the first connection structure, which further improves the stability of the connection between the battery device and the electrical equipment.

[0035] In some embodiments of this application, there are multiple first connection structures, and the multiple first connection structures are arranged at intervals along the first direction and / or a third direction, the third direction intersecting the first direction and the arrangement direction from the first wall to the second wall respectively.

[0036] By adopting the above technical solution, the number of first connection structures is designed to be multiple, and the multiple first connection structures are arranged at intervals along the first direction and / or the third direction. External electrical equipment is connected through the multiple first connection structures, thereby further improving the stability of the connection between the battery device and the electrical equipment.

[0037] In some embodiments of this application, a plurality of the first connecting structures are arranged at intervals along the third direction, and the minimum distance between two adjacent first connecting structures along the third direction is 100mm-2000mm.

[0038] By adopting the above technical solution, the minimum distance between two adjacent first connection structures along a third direction is designed to be 100mm-2000mm, which can meet the quantity requirements of the first connection structure and reduce the impact on the structural stability of the battery device.

[0039] In some embodiments of this application, the minimum distance between two adjacent first connection structures along the third direction is 300mm-1000mm.

[0040] By adopting the above technical solution, the quantity requirements of the first connection structure can be further met, and the impact on the structural stability of the battery device can be reduced.

[0041] In some embodiments of this application, the first connecting structure is disposed on a first centerline of the battery device along the first direction, and / or the first connecting structure is disposed on a second centerline of the battery device along a third direction, the third direction intersecting the first direction and the arrangement direction of the first wall to the second wall respectively.

[0042] By adopting the above technical solution, the first connecting structure is set on the centerline of the battery device along the first direction, so that the first connecting structure is located at the center position of the battery device along the first direction or closer to the center position. Therefore, after the first connecting structure is connected to the electrical equipment, the possibility of vibration in the middle part of the battery device can be further reduced.

[0043] In some embodiments of this application, the side portion is provided with at least one second connection structure, which is also used to connect the electrical equipment.

[0044] By adopting the above technical solution, a second connection structure is provided on the side, and the electrical equipment is connected by the second connection structure, so that both the middle part and the side of the battery device can be connected to the electrical equipment, thereby improving the connection stability between the battery device and the electrical equipment.

[0045] In some embodiments of this application, the minimum size of the battery device is greater than or equal to 600 mm along any one of the first, second, and third directions; and / or the weight of the battery device is greater than or equal to 200 kg.

[0046] By adopting the above technical solution, the size of the battery device in any direction is designed to be greater than or equal to 600mm. The battery device with this size is relatively large, and the middle part is prone to vibration. When the first connecting structure is set in the middle part, the possibility of vibration in the middle part of the battery device with this size can be effectively reduced. When the weight of the battery device is greater than or equal to 200kg, the weight and size of the battery are relatively large, and the middle part is prone to vibration. When the first connecting structure is set in the middle part, the possibility of vibration in the middle part of the battery device with this size can also be effectively reduced.

[0047] Secondly, embodiments of this application provide an electrical device including a battery device as described in any of the above technical solutions, wherein the battery device is used to provide electrical energy or store electrical energy. Attached Figure Description

[0048] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0049] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0050] Figure 2 Exploded views of battery devices provided in some embodiments of this application;

[0051] Figure 3 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application;

[0052] Figure 4 for Figure 3 AA section diagram;

[0053] Figure 5 for Figure 4 Enlarged view of part A;

[0054] Figure 6A schematic diagram showing the connection of the first connector and the second connector of the battery device provided in some embodiments of this application;

[0055] Figure 7 Exploded views of heat exchangers provided in some embodiments of this application;

[0056] Figure 8 A schematic diagram of the flow channel plate of a heat exchanger provided in some embodiments of this application;

[0057] Figure 9 for Figure 8 Enlarged view of part b;

[0058] Figure 10 A top view of a first type of battery device provided for some embodiments of this application;

[0059] Figure 11 A top view of a second battery device provided in some embodiments of this application;

[0060] Figure 12 A top view of a third battery device provided for some embodiments of this application.

[0061] The reference numerals in the accompanying drawings for the specific embodiments are as follows:

[0062] 1000, vehicles;

[0063] 100. Battery assembly; 101. Middle section; 102. Side section; 103. First center line; 104. Second center line;

[0064] 10. Battery housing; 11. First wall; 111. First surface; 12. Second wall; 121. Second surface; 13. Side wall;

[0065] 20. Battery cell;

[0066] 30. Heat exchanger; 31. First plate; 311. Flow channel; 32. Second plate; 33. Joint assembly; 34. Heat exchange medium flow channel; 341. Clearance section;

[0067] 40. First connecting structure; 41. First connecting part; 411. First connecting hole; 42. Second connecting part; 421. Second connecting hole; 43. Third connecting part; 431. Third connecting hole; 44. First connecting member; 441. First cylinder; 442. Second cylinder; 443. Third cylinder; 444. Fourth cylinder; 45. Second connecting member;

[0068] 50. Electrical components;

[0069] 200. Controller;

[0070] 300. Motor;

[0071] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0072] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0073] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0074] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0075] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" 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; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0076] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, H and / or B can represent: H existing alone, H and B existing simultaneously, and B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0077] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0078] In this application, "multiple" means two or more (including two).

[0079] A battery pack typically consists of a battery housing and individual battery cells located within it. The battery housing withstands external impacts and pressure, protecting the internal components from physical damage and reducing the risk of damage from collisions or drops. Mounting structures are located on both sides of the battery housing for connecting to the mounting points of electrical equipment such as those mounted on the vehicle body.

[0080] However, as the requirements for battery range increase, the number of individual battery cells in the battery pack increases, which in turn increases the size and weight of the battery pack. After the battery pack is installed in the vehicle body, the middle part of the battery pack is prone to vibration during vehicle body vibration, which will negatively affect the stability and reliability of the battery pack.

[0081] Therefore, improving the connection stability between battery devices and electrical equipment such as vehicles, and reducing the possibility of vibration in the middle part of the battery device, is an important issue in the research and development of battery devices and their related components.

[0082] In view of this, this application provides a technical solution by setting a first connecting structure that runs through the entire battery device in the middle region of the battery device, and connecting the electrical equipment through the first connecting structure, thereby solving the above-mentioned technical problems.

[0083] The following is in conjunction with the appendix Figure 1-12 The battery device 100 and electrical equipment provided in the embodiments of this application will be described. For ease of explanation, the following embodiments will use a vehicle as an example of electrical equipment.

[0084] Combined with appendix Figure 1As shown, this application provides an electrical device, which is a vehicle 1000. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0085] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0086] Besides the vehicle 1000 mentioned above, electrical equipment can also include mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Spacecraft include airplanes, rockets, space shuttles, and spaceships, 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 aforementioned electrical equipment.

[0087] Combined with appendix Figure 2-4 As shown, this application embodiment provides a battery device 100, including a battery housing 10 and battery cells 20 installed in the battery housing 10. The battery housing 10 includes a first wall 11 and a second wall 12 opposite to each other, and a side wall 13 connecting the first wall 11 and the second wall 12. The first wall 11, the second wall 12 and the side wall 13 together form the inner cavity of the battery housing 10. Along a first direction X intersecting the arrangement direction of the first wall 11 to the second wall 12, the battery device 100 includes a middle part 101 and side parts 102 located on both sides of the middle part 101. The size of the middle part 101 along the first direction X is greater than or equal to the size of each side part 102 along the first direction X. The middle part 101 is provided with at least one first connecting structure 40. The first connecting structure 40 passes through the first wall 11, the inner cavity of the battery housing 10 and the second wall 12, and is used to connect electrical equipment.

[0088] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells 20, which are connected in series, parallel, or mixed connections via a busbar.

[0089] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 20; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into a single module. As an example, a battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0090] In some embodiments, the battery device 100 may be a battery pack, which includes a battery housing 10 and one or more battery cell assemblies, each battery cell assembly including a plurality of battery cells 20, the battery cell assembly being housed within the battery housing 10.

[0091] In some embodiments, the battery device 100 may also refer to an energy storage device, which includes a battery housing 10, and at least one side of the battery housing 10 is provided with a door. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0092] In some embodiments, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the battery housing 10 by fixing the battery module in the battery housing 10.

[0093] In some embodiments, the battery cell assembly may also be housed in the battery housing 10 by directly fixing multiple battery cells 20 to the battery housing 10. The structure of the battery housing 10 is described in more detail below.

[0094] In some embodiments, the first surface 111 and the second surface 121 may be two opposing surfaces along the thickness direction of the battery device 100. In some embodiments, one of the first surface 111 and the second surface 121 is a surface for direct contact with electrical equipment.

[0095] For ease of understanding, in this embodiment, the battery device 100 is divided into three regions along the first direction X: the middle part 101 and the side parts 102 located on both sides of the middle part 101, and the middle part 101 and the side parts 102 are divided by dashed lines.

[0096] As a further refinement of the above technical solution, the size of the middle portion 101 along the first direction X can be designed to be smaller than or equal to the size of the side portion 102 along the first direction X, so that the first connecting structure 40 on the middle portion 101 can be closer to the middle region of the battery device 100 along the first direction X.

[0097] Side portion 102 refers to the portion of the battery device 100 having a certain size on both sides along the first direction X, and does not refer to the two opposite sides of the battery device 100 along the first direction X. When the first direction X is the length direction of the battery device 100, side portion 102 can be the end of the battery device 100.

[0098] In this embodiment, the first direction X can be one of the length direction and the thickness direction of the battery device 100, for example... Figure 2 As shown, the first direction X is the length direction of the battery device 100. The first direction X intersects the arrangement direction of the first surface 111 to the second surface 121 (the second direction Y in the figure). In some embodiments, the first direction X is perpendicular to the arrangement direction of the first surface 111 to the second surface 121.

[0099] In order to reduce the possibility of resonance in the middle part 101 of the battery device 100 when the vehicle 1000 vibrates, this embodiment provides at least one first connection structure 40 in the middle part 101, that is, the number of first connection structures 40 on the middle part 101 is one or more.

[0100] Furthermore, the first connecting structure 40 penetrates the first surface 111, the inner cavity of the battery device 100, and the second surface 121. In some embodiments, the first connecting structure 40 penetrates the structure of the battery device 100 except for the battery cell 20. It should be understood that the "penetration" in the first connecting structure 40 penetrating the first surface 111, the inner cavity of the battery device 100, and the second surface 121 in this embodiment refers to the first connecting structure 40 penetrating the first surface 111, the inner cavity of the battery device 100, and the second surface 121 as a whole. When the first connecting structure 40 is a plurality of spaced-apart structures (e.g., including the first connecting hole 411, the second connecting hole 421, and the third connecting hole 431 described below), the whole formed by the plurality of parts can also be regarded as penetrating the first surface 111, the inner cavity of the battery device 100, and the second surface 121 as a whole.

[0101] The first connection structure 40 in this embodiment refers to a structure that can connect electrical equipment through mechanical connection (including plug-in, snap-in, bolt connection, etc.). The first connection structure 40 and the electrical equipment can be directly connected or indirectly connected, and the two can maintain a fixed relative position after connection.

[0102] By connecting the power-consuming equipment through the first connection structure 40, the overall structure of the battery device 100 on the middle part 101 can be connected to the power-consuming equipment, which improves the connection stability between the battery device 100 and the power-consuming equipment in the middle part 101, reduces the possibility of resonance in the middle part 101 of the battery device 100 when the power-consuming equipment vibrates, and thus improves the structural stability and reliability of the battery device 100.

[0103] The battery housing 10 provides a space for housing the battery cells 20, and the battery housing 10 can adopt various structures. For example, the battery housing 10 may include a first housing and a second housing, which cover each other, and the first housing and the second housing together define a space for housing the battery cells 20.

[0104] In this design, both the first and second housings can be hollow structures with one open end, with the second housing covering the open side of the first housing, so that the first and second housings together define the accommodating space. Alternatively, the second housing can be a plate-like structure, and the first housing can be a hollow structure with one open side, with the open side of the second housing covering the open side of the first housing. Of course, the battery housing 10 formed by the first and second housings can be of various shapes, such as a cylinder, a cuboid, etc.

[0105] In some embodiments, the battery housing 10 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, forming a closed space inside the battery housing 10 to accommodate individual battery cells. The top cover can be considered as the second housing described above, and the frame and bottom plate, when connected, can be considered as the first housing described above.

[0106] In some embodiments, the battery housing 10 may be part of the chassis structure of the vehicle 1000. For example, the top cover of the battery housing 10 may be at least part of the chassis structure of the vehicle 1000, or the frame of the battery housing 10 may be at least part of the crossbeams and longitudinal beams of the vehicle 1000.

[0107] The battery cell 20 mentioned in the embodiments of this application may include an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode, a negative electrode, and a separator. The battery cell 20 mainly operates by the movement of metal ions between the positive and negative electrode. The positive electrode includes a positive current collector and a positive active material layer, the positive active material layer being coated on the surface of the positive current collector; the positive current collector includes a positive electrode coating area and a positive electrode tab connected to the positive electrode coating area, the positive electrode coating area being coated with the positive active material layer, and the positive electrode tab not being coated with the positive active material layer.

[0108] Taking a lithium-ion battery cell 20 as an example, the positive electrode current collector can be made of aluminum, and the positive electrode active material layer includes positive electrode active material, which can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative electrode current collector and a negative electrode active material layer, with the negative electrode active material layer coated on the surface of the negative electrode current collector. The negative electrode current collector includes a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area. The negative electrode coating area is coated with the negative electrode active material layer, while the negative electrode tab is not coated with the negative electrode active material layer. The negative electrode current collector can be made of copper, and the negative electrode active material layer includes negative electrode active material, which can be carbon or silicon, etc. The separator can be made of PP (polypropylene) or PE (polyethylene), etc.

[0109] The battery housing 10 has a first wall 11 and a second wall 12 opposite to each other along the second direction Y, and a side wall 13 connecting the first wall 11 and the second wall 12. In some embodiments, the first wall 11 can be understood as one of the top cover and the bottom plate mentioned above, and the second wall 12 can be understood as the other of the top cover and the bottom plate mentioned above. For example, the top cover in the figure is the first wall 11 mentioned above, the bottom plate is the second wall 12 mentioned above, and the multiple side walls 13 enclose the frame mentioned above. The second wall 12 and the multiple side walls 13 enclose the first housing mentioned above.

[0110] The second direction Y is the arrangement direction of the first surface 111 to the second surface 121, and also the arrangement direction of the first wall 11 to the second wall 12. In some embodiments, the second direction Y is the thickness direction of the entire battery device 100.

[0111] In order to enable both the first wall 11 and the second wall 12 of the battery device 100 to be connected to the electrical equipment.

[0112] In some examples, the first connection structure 40 may optionally include a first connection portion 41 disposed on the first wall 11 and a second connection portion 42 disposed on the second wall 12, wherein the first connection portion 41 and the second connection portion 42 are aligned along a second direction Y, the second direction Y being the arrangement direction of the first wall 11 to the second wall 12.

[0113] The first connecting part 41 and the second connecting part 42 may include structures such as holes, sleeves, and grooves.

[0114] The first connecting part 41 and the second connecting part 42 can be connected to the electrical equipment by mechanical means such as plugging, snapping, or bolting. Although the first connecting part 41 and the second connecting part 42 are spaced apart, after they are connected to the electrical equipment respectively, they can be regarded as an integral structure on the battery device 100 for connecting the electrical equipment.

[0115] As can be seen from the above description, in this embodiment, the first connection structure 40 is designed to include a first connection part 41 provided on the first wall 11 and a second connection part 42 provided on the second wall 12 of the battery box 10, so that both walls of the battery box 10 can be connected to the electrical equipment, thereby improving the connection stability between the battery box 10 and the electrical equipment.

[0116] Combined again with the appendix Figure 2 and 7 As shown, in some examples, the battery device 100 may optionally include a heat exchanger 30 installed in the battery housing 10, the heat exchanger 30 being connected to the first wall 11 or the second wall 12, and the first connection structure 40 including a third connection portion 43 penetrating through the heat exchanger 30, the third connection portion 43 being located between the first connection portion 41 and the second connection portion 42.

[0117] The heat exchanger 30 can be a plate-like structure as shown in the figure. The heat exchanger 30 absorbs and dissipates the heat generated by the battery device 100 during charging and discharging by circulating heat exchange medium, keeping the battery device 100 within the ideal operating temperature range. This can reduce the possibility of overheating of the battery device 100, thereby extending the life of the battery device 100 and improving the safety of the battery device 100.

[0118] In some embodiments, the heat exchanger 30 is a water-cooled plate, and the heat exchange medium can be water or other coolant. The water-cooled plate includes a first plate 31, a second plate 32 and a connector assembly 33. The third connecting hole 431 passes through the first plate 31 and the second plate 32. That is, the third connecting hole 431 can be regarded as a part located in the first plate 31 and another part located in the second plate 32.

[0119] The connector assembly 33 is used to connect the coolant pipe (not shown in the figure) and the heat exchange medium flow channel 34 inside the water-cooled plate. The first plate 31 is provided with multiple flow channel grooves 311. After the second plate 32 is connected to the first plate 31, the multiple flow channel grooves 311 and the second plate 32 surround multiple heat exchange medium flow channels 34.

[0120] A third connecting part 43 is provided on the heat exchanger 30. The third connecting part 43 is located between the first connecting part 41 and the second connecting part 42. The first connecting part 41, the third connecting part 43 and the second connecting part 42 together form a first connecting structure 40 that runs through the entire battery device 100 along the second direction Y.

[0121] Similar to or similar to the first connecting part 41 and the second connecting part 42 mentioned above, the third connecting part 43 may include mechanical connection structures such as holes, grooves, and sleeves, which will not be listed one by one in this embodiment.

[0122] When assembling the battery device 100, the heat exchanger 30 can be installed on the aforementioned frame and / or on the second wall 12. The first connection structure 40 is designed to include a third connection portion 43 located on the heat exchanger 30, so that the heat exchanger 30 of the battery device 100 can be connected to the electrical equipment, thereby improving the stability of the connection between the heat exchanger 30 and the entire battery device 100 and the electrical equipment.

[0123] In addition to the heat exchanger 30, the battery device 100 may also include an electrical device 50 that is electrically connected to the battery cell 20. In some embodiments, the electrical device 50 may include a battery management system (BMS).

[0124] Combined again with the appendix Figure 2 As shown, in some examples, optionally, the first connecting part 41 includes a first connecting hole 411, the second connecting part 42 includes a second connecting hole 421, and the third connecting part 43 includes a third connecting hole 431, the third connecting hole 431 being connected to the first connecting hole 411 and the second connecting hole 421 respectively.

[0125] The first connecting hole 411, the third connecting hole 431, and the second connecting hole 421 are connected sequentially along the second direction Y in the figure, and there may be a gap between the first connecting hole 411 and the third connecting hole 431 along the second direction Y. The third connecting hole 431 and the second connecting hole 421 may be directly connected or have a certain gap.

[0126] The first connecting hole 411, the second connecting hole 421 and the third connecting hole 431 are all through holes. They can be circular holes or oblong holes, or other shapes of through holes. This embodiment will not list them all.

[0127] When connecting to electrical equipment, a connector can be directly inserted into the first connection hole 411, the second connection hole 421 and the third connection hole 431 to complete the connection between the first connection structure 40 and the electrical equipment. The connector can be regarded as part of the electrical equipment and also as part of the first connection structure 40.

[0128] Of course, the first connecting hole 411, the second connecting hole 421 and the third connecting hole 431 can also be threaded holes, and a bolt can be threaded to the above three connecting holes. The bolt can be regarded as part of the electrical equipment, or as part of the first connecting structure 40.

[0129] In this embodiment, the first connecting part 41 is designed to include a first connecting hole 411, the second connecting part 42 is designed to include a second connecting hole 421, and the third connecting part 43 is designed to include a third connecting hole 431. The electrical equipment is connected through the above-mentioned connecting hole structure, which is simple in structure and facilitates the processing and assembly of the battery device 100.

[0130] Combined with appendix Figure 4 and attached Figure 5 As shown, in some examples, the first connection structure 40 may optionally include a first connector 44, which is connected through the first connection hole 411, the second connection hole 421 and the third connection hole 431, and is used to connect electrical equipment.

[0131] The first connecting member 44 can be a single connecting member or a connecting member formed by combining multiple components. The first connecting member 44 can be a rod-shaped member, a block-shaped member, or a cylindrical member, etc. The shape of the first connecting member 44 will not be listed in detail in this embodiment.

[0132] The first connector 44 is connected to the first connecting hole 411, the second connecting hole 421 and the third connecting hole 431 respectively. The connection method can be plug-in, snap-fit, bolt connection, adhesive, welding or other methods.

[0133] The first connector 44 can be directly connected to the electrical equipment, or it can be indirectly connected through other structures (such as the second connector 45 described below). When the first connector 44 is directly connected to the electrical equipment, the connection method can be plug-in, welding, bonding, bolt connection, snap-fit, etc., as long as it can keep the first connector 44 relatively fixed after being connected to the electrical equipment.

[0134] In this embodiment, the first connector 44 is connected to the first connecting hole 411, the second connecting hole 421 and the third connecting hole 431, so that the first connector 44 is connected to the battery box 10 and the water cooling plate as a whole. Then, the first connector 44 is used to connect to the electrical equipment, so that the rest of the battery device 100 except for the battery cell 20 is indirectly connected to the electrical equipment, which can improve the connection stability between the battery device 100 and the electrical equipment.

[0135] In some examples, the first connecting hole 411, the second connecting hole 421 and the third connecting hole 431 are optionally oblong holes.

[0136] A waist-shaped hole refers to a hole-like structure with rounded ends and two straight segments in the middle, which is similar to the shape of a "waist".

[0137] The first connecting hole 411, the second connecting hole 421 and the third connecting hole 431 are designed as waist-shaped holes. The waist-shaped holes can facilitate the first connecting member 44 to mate with the above-mentioned connecting holes when there is a dimensional error in the first connecting member 44.

[0138] Of course, in addition to the waist-shaped hole, the first connecting hole 411, the second connecting hole 421 and the third connecting hole 431 can also be round holes or square holes, etc., which will not be listed one by one in this embodiment.

[0139] Combined with appendix Figure 5 and attached Figure 6 As shown, in some examples, optionally, the first connector 44 is a cylindrical member with open ends and a hollow interior. The first connection structure 40 also includes a second connector 45, which passes through the first connector 44. The first connector 44 is connected to the electrical equipment through the second connector 45.

[0140] The first connector 44 may be a single piece or a detachable component composed of multiple parts. In some embodiments, the first connector 44 includes a first cylinder 441, a second cylinder 442, a third cylinder 443, and a fourth cylinder 444 connected sequentially from top to bottom in the figure. The cylinders can be connected by threads, plug-in, or snap-fit ​​connections.

[0141] The reason for designing the first connector 44 as including the above-mentioned multiple cylindrical structures is that the base plate needs to be installed first during the assembly of the battery device 100. Therefore, in this embodiment, the third cylindrical body 443 and the fourth cylindrical body 444 are first connected to the second connecting hole 421 on the second wall 12, then the second cylindrical body 442 is connected to the third connecting hole 431 of the heat exchanger 30, and then the first cylindrical body 441 is connected to the first connecting hole 411 on the first wall 11. In this way, the assembly of the first connector 44 can be adapted to the assembly process of the battery device 100, thereby making it easier for the first connector 44 to dock with the first connecting hole 411, the second connecting hole 421 and the third connecting hole 431 respectively.

[0142] After the first cylinder 441, the second cylinder 442, the third cylinder 443 and the fourth cylinder 444 form the first connecting member 44, the first connecting member 44 forms a through hole, which allows the second connecting member 45 to be inserted, and the through hole may also be provided with threads.

[0143] The second connector 45 can be a bolt or a plug. The direct connection between the second connector 45 and the electrical equipment achieves the indirect connection and fixation between the first connector 44 and the electrical equipment.

[0144] In this embodiment, the first connector 44 is designed as a cylindrical part. The first connector 44 is used to connect the first connecting hole 411, the second connecting hole 421 and the third connecting hole 431, so that the battery box 10 and the heat exchanger 30 form an integral connection structure with through holes under the connection of the first connector 44. Then, the second connector 45 is used to connect the first connector 44 and the electrical equipment respectively, which can further improve the connection stability between the battery device 100 and the electrical equipment.

[0145] In some examples, the minimum diameter of the first connecting hole 411, the minimum diameter of the second connecting hole 421, and the minimum diameter of the third connecting hole 431 are optionally 10mm-50mm.

[0146] The above technical solution includes multiple implementations. For example, the minimum diameter of the first connecting hole 411 can be 10mm-50mm, while the diameters of the second connecting hole 421 and the third connecting hole 431 are not limited. Alternatively, the minimum diameter of the second connecting hole 421 can be 10mm-50mm, while the diameters of the first connecting hole 411 and the third connecting hole 431 are not limited. Or, the minimum diameter of the third connecting hole 431 can be 10mm-50mm, while the diameters of the first connecting hole 411 and the second connecting hole 421 are not limited.

[0147] The minimum diameter of the connecting holes 411, 421 and 431 mentioned above refers to the minimum distance between two opposite points on the hole wall corresponding to the line passing through the centroid of the connecting hole.

[0148] When the first connecting hole 411, the second connecting hole 421 and the third connecting hole 431 in this embodiment are all circular holes, the minimum hole diameter is the diameter of the first connecting hole 411. When the first connecting hole 411, the second connecting hole 421 and the third connecting hole 431 in this embodiment are all the above-mentioned waist-shaped holes, the first connecting hole 411 is the minimum distance between the two opposite straight hole walls of the waist-shaped hole.

[0149] The diameters of the first connecting hole 411, the second connecting hole 421, and the third connecting hole 431 are designed to be 10mm-50mm. This is mainly because if the diameters are too small, the connection dimensions between the first connecting hole 411, the second connecting hole 421, and the third connecting hole 431 and the electrical device will be too small. Specifically, this could result in the radial dimensions of the first connector 44 and the second connector 45 being too small, which could easily affect the connection stability between the middle part 101 of the battery device 100 and the electrical device.

[0150] If the diameters of the first connecting hole 411, the second connecting hole 421 and the third connecting hole 431 are made too large, it is easy to reduce the structural strength of the first wall 11, the second wall 12 and the heat exchanger 30 of the battery device 100, and reduce the heat exchange area of ​​the heat exchanger 30.

[0151] Therefore, considering the above points, in this embodiment, the minimum diameter of the first connecting hole 411, the second connecting hole 421, and the third connecting hole 431 is 10mm-50mm. In some embodiments, the minimum diameter of the first connecting hole 411, the second connecting hole 421, and the third connecting hole 431 can be 10mm, 20mm, 30mm, 40mm, and 50mm, etc., and can be adapted according to the size and weight of the battery device 100.

[0152] In this way, the negative impact of setting the above-mentioned connection holes on the structural strength of the battery box 10 and the water-cooling plate can be reduced. It is also convenient to process and the hole diameter can meet the connection strength of the electrical equipment or the first connector 44.

[0153] In some examples, optionally, the minimum diameter of the first connecting hole 411, the second connecting hole 421 and the third connecting hole 431 is 15mm-30mm.

[0154] The above technical solution further restricts the minimum aperture of the first connecting hole 411, the second connecting hole 421 and the third connecting hole 431. The connecting holes that meet this condition can further reduce the negative impact on the structural strength of the battery box 10 and the water-cooling plate, and are more convenient to process. Moreover, the aperture can further meet the connection strength requirements of the electrical equipment or the first connector 44.

[0155] In some embodiments, the minimum diameter of the first connecting hole 411, the second connecting hole 421, and the third connecting hole 431 can be 15mm, 18mm, 20mm, 25mm, 28mm, and 30mm, etc., which will not be listed one by one in this embodiment.

[0156] Combined with appendix Figure 8 and 9 As shown, in some examples, optionally, the heat exchanger 30 is provided with a heat exchange medium flow channel 34 inside, and the heat exchange medium flow channel 34 is offset from the third connection part 43 in the second direction Y.

[0157] The heat exchange medium flow channel 34 and the third connection part 43 are staggered in the second direction Y, which means that the projections of the heat exchange medium flow channel 34 and the third connection part 43 on the second wall 12 in the second direction Y do not overlap.

[0158] When the number of heat exchange medium channels 34 is multiple as shown in the figure, the heat exchange medium channel 34 that is closest to the third connection part 43 among the multiple heat exchange medium channels 34 needs to be staggered from the third connection part 43 in the second direction Y.

[0159] The reason for adopting this design is that the setting of the third connection part 43 should not affect the water cooling circulation of the heat exchange medium flow channel 34. If the third connection part 43 and the heat exchange medium flow channel 34 partially overlap, the flow area of ​​the heat exchange medium flow channel 34 will be reduced, affecting the cooling effect. It may even be necessary to seal the heat exchange medium flow channel 34 at the third connection part 43, increasing production costs.

[0160] Therefore, in this embodiment, when designing the heat exchanger 30, the heat exchange medium flow channel 34 and the third connection part 43 are designed to be offset in the second direction Y, so that the heat exchange medium flow channel 34 avoids the third connection part 43, reducing the possibility of mutual influence between the two.

[0161] In some examples, optionally, the minimum distance between the heat exchange medium channel 34 and the third connection 43 is greater than or equal to 5 mm.

[0162] When the third connecting part 43 includes the aforementioned third connecting hole 431, and the third connecting hole 431 is a round hole, the minimum distance between the heat exchange medium flow channel 34 and the third connecting part 43 is: the distance between the side of the third connecting hole 431 closest to the heat exchange medium flow channel 34 and the heat exchange medium flow channel 34 along the second direction Y.

[0163] The minimum distance between the heat exchange medium flow channel 34 and the third connection part 43 is marked by L1 in the figure. When L1 is greater than or equal to 5mm, the heat exchange medium flow channel 34 and the third connection part 43 have a certain safe distance, which further reduces the possibility of mutual influence between the third connection part 43 and the heat exchange medium flow channel 34, so that the heat exchange effect of the heat exchange medium flow channel 34 will not be excessively transferred to the outside through the third connection part 43.

[0164] In some examples, the minimum distance between the heat exchange medium channel 34 and the third connection 43 is optionally less than or equal to 40 mm.

[0165] Of course, based on the above-mentioned L1 being greater than or equal to 5mm, L1 should not be too large, because if the minimum distance between the heat exchange medium flow channel 34 and the third connection part 43 is too large, the number of heat exchange medium flow channels 34 provided on the heat exchange element 30 will be reduced.

[0166] Therefore, in this embodiment, L1 is designed to be greater than or equal to 5mm and less than or equal to 40mm. For example, L1 can be 5mm, 10mm, 20mm, 30mm and 40mm, etc. This embodiment will not list them one by one.

[0167] In this embodiment, the minimum distance L1 between the heat exchange medium flow channel 34 and the third connection part 43 is designed to be less than or equal to 40mm, so that the safe distance between the heat exchange medium flow channel 34 and the third connection part 43 is not too large, thus reducing the number of heat exchange medium flow channels 34 and reducing the negative impact of setting the third connection part 43 on the water cooling efficiency of the heat exchange component 30.

[0168] In some examples, the heat exchange medium flow channel 34 may optionally have a clearance section 341 facing the third connection portion 43, the clearance section 341 being recessed in a direction away from the third connection portion 43.

[0169] The heat exchange medium flow channel 34 is designed to have a clearance section 341. When the heat exchange medium flow channel 34 extends along the first direction X in the figure, the clearance section 341 of the heat exchange medium flow channel 34 is arranged opposite to the third connection part 43 along the second direction Y in the figure.

[0170] By utilizing the recess of the avoidance section 341, L1 meets the above-mentioned numerical requirements, and the overall flow direction of the heat exchange medium flow channel 34 can be maintained without changing it, thereby reducing the negative impact of the third connection part 43 on the water cooling efficiency of the heat exchanger 30.

[0171] In some examples, the avoidance segment 341 may optionally be a circular arc segment.

[0172] The arc segment refers to the side of the avoidance segment 341 facing the third connecting part 43 being an arc surface or having an arc line.

[0173] Compared to straight lines, oblique lines, and other curves, the avoidance section 341 is designed as an arc section. The side of the arc section facing the third connecting part 43 is an arc surface. Along the circumference of the arc surface, the distance between the arc surface and the third connecting part 43 is equal or approximately equal, which makes it easier to control the distance between the avoidance section 341 and the third connecting part 43.

[0174] In some examples, the battery housing 10 may optionally include a support beam (not shown) connected between two opposing sidewalls 13, and the first connection structure 40 includes a fourth connection portion extending through the support beam, the fourth connection portion being located between the first connection portion 41 and the third connection portion 43.

[0175] The length direction of the support beam can be a longitudinal beam set along the first direction XX, or a transverse beam set along the third direction ZZ.

[0176] The fourth connecting part may include a fourth connecting hole, and the first connecting member 44 described above may also be connected to and pass through the fourth connecting hole.

[0177] The support beam not only improves the structural strength and stability of the battery box 10, but also, by designing the first connection structure 40 to include a fourth connection part that runs through the support beam, the support beam is also connected to the electrical equipment through the first connection structure 40, further improving the stability of the connection between the battery device 100 and the electrical equipment.

[0178] Combined with appendix Figure 10-12 As shown, in some examples, optionally, there are multiple first connection structures 40, which are arranged at intervals along the first direction X and / or the third direction Z, respectively intersecting the first direction X and the arrangement direction of the first surface 111 to the second surface 121.

[0179] The above technical solution includes multiple implementation methods, to Figure 10 For example, the first direction X is the length direction of the battery device 100, the third direction Z is the width direction of the battery device 100, and the multiple first connecting structures 40 are arranged at intervals along the third direction Z. In some embodiments, the multiple first connecting structures 40 can be arranged at uniform intervals along the third direction Z.

[0180] by Figure 11 For example, the first direction X is the length direction of the battery device 100, and the third direction Z is the width direction of the battery device 100. Multiple first connecting structures 40 are arranged at intervals along the first direction X. In some embodiments, multiple first connecting structures 40 can be arranged at uniform intervals along the first direction X. When the size of the middle part 101 along the first direction X is greater than the size of the side part 102 along the first direction X, the multiple first connecting structures 40 arranged at intervals along the first direction X are all located in the middle part 101. When the size of the middle part 101 along the first direction X is smaller than the size of the side part 102 along the first direction X, some of the multiple first connecting structures 40 are located in the side part 102.

[0181] by Figure 12 For example, the first direction X is the length direction of the battery device 100, the third direction Z is the width direction of the battery device 100, and the multiple first connection structures 40 are arranged at intervals along the first direction X and also at intervals along the third direction Z.

[0182] The term "multiple" in the above-mentioned plurality of first connecting structures 40 refers to two or more, for example, the first connecting portion 41 on the intermediate portion 101 could be Figure 10 and 11 The three of them, or Figure 12 Five of them.

[0183] Compared to having only one first connection structure 40, designing multiple first connection structures 40 with multiple first connection structures 40 spaced apart along the first direction X and / or the third direction Z, and connecting external electrical equipment through multiple first connection structures 40, can further improve the stability of the connection between the battery device 100 and the electrical equipment, thereby reducing the possibility of resonance of the middle part 101 of the battery device 100 along with the vehicle 1000.

[0184] In some examples, optionally, the minimum distance between two adjacent first connection structures 40 along the third direction Z is 100mm-2000mm.

[0185] In the figure, the minimum distance between two adjacent first connection structures 40 along the third direction Z is marked as L2. The size of L2 can be 100mm-2000mm, for example, L2 is 100mm, 200mm, 500mm, 1000mm and 2000mm, etc. This embodiment will not list them one by one.

[0186] The reason for adopting the above design is that the minimum distance L2 between two adjacent first connection structures 40 along the third direction Z should not be too large or too small. If L2 is too large, the distance between two adjacent first connection structures 40 will be large, making it difficult to arrange too many first connection structures 40 on the battery device 100 with fixed size. As a result, the improvement on the connection stability between the battery device 100 and the electrical equipment is weak, thereby weakening the effect of reducing the vibration of the middle part 101 of the battery device 100.

[0187] However, if L2 is too small, the first connection structure 40 will be arranged too densely, which will not only increase production costs, but also have a negative impact on the structural strength of the battery device 100.

[0188] Therefore, in this embodiment, the minimum distance between two adjacent first connection structures 40 along the third direction Z is designed to be 100mm-2000mm, which can meet the quantity requirements of the first connection structures 40 and at the same time reduce the impact on the structural stability of the battery device 100.

[0189] In some examples, optionally, the minimum distance between two adjacent first connection structures 40 along the third direction Z is 300mm-1000mm.

[0190] The L2 was designed to be 300mm-1000mm. In addition to considering the quantity requirements of the first connecting structure 40 and the structural stability of the battery device 100, it was also found that the spacing of the first connecting structure 40 would affect the amplitude and main frequency of the vibration transmitted to the battery device 100 when the electrical equipment vibrates.

[0191] Therefore, this embodiment further optimized the design of L2 through experiments, designing it to be 300mm-1000mm, for example, it can be 300mm, 500mm, 700mm, 900mm and 1000mm, etc., which will not be listed one by one in this embodiment.

[0192] Designing L2 to be 300mm-1000mm not only further meets the quantity requirements of the first connection structure 40 and reduces the impact on the structural stability of the battery device 100, but also reduces the amplitude and main frequency transmitted to the battery device 100 when the electrical equipment vibrates, thus better reducing the possibility of vibration in the middle part 101 of the battery device 100.

[0193] Similarly, when multiple first connecting structures 40 are spaced apart along the first direction X in the figure, the minimum distance between two adjacent first connecting structures 40 is designed to be 100mm-2000mm. In some embodiments, it can also be designed to be 300mm-1000mm.

[0194] In some examples, the first connection structure 40 is optionally disposed on the first centerline 103 of the battery device 100 along the first direction X, and / or the first connection structure 40 is disposed on the second centerline 104 of the battery device 100 along the third direction Z, which intersects the first direction X and the arrangement direction of the first surface 111 to the second surface 121 respectively.

[0195] The first connecting structure 40 is disposed on the first centerline 103 of the battery device 100 along the first direction X (the first centerline 103 and the second centerline 104 are marked with dashed lines in the figure). This means that any position of the first connecting structure 40 coincides with the first centerline 103 of the battery device 100 along the first direction X. This arbitrary position can be the center of the first connecting structure 40 along the first direction X, or both sides of the first connecting structure 40 along the first direction X, or the part between the center and both sides of the first connecting structure 40 along the first direction X.

[0196] In this way, the first connecting structure 40 can be located at the center of the battery device 100 along the first direction X or closer to the center, thereby further reducing the possibility of vibration in the middle part 101 of the battery device 100 after the first connecting structure 40 is connected to the electrical equipment.

[0197] Similarly, the first connecting structure 40 is disposed on the second centerline 104 of the battery device 100 along the third direction Z, so that the first connecting structure 40 is closer to the center of the battery device 100, thereby reducing the possibility of vibration in the middle part 101 of the battery device 100.

[0198] In some examples, the side portion 102 may optionally be provided with at least one second connection structure (not shown in the figure), which is also used to connect electrical equipment.

[0199] The second connection structure can be located on the side of the side 102 away from the middle part 101, or at one end. The second connection structure does not need to penetrate the inner cavity of the battery box 10. The second connection structure can include connecting rods, bolts and other connecting components. In some embodiments, the second connection structure can be a mounting structure in related technologies, as long as it can achieve mechanical connection with the electrical equipment. This embodiment will not describe it in detail.

[0200] A second connection structure is provided on the side 102, and the electrical equipment is connected by the second connection structure, so that both the middle part 101 and the side 102 of the battery device 100 can be connected to the electrical equipment, thereby improving the connection stability between the battery device 100 and the electrical equipment.

[0201] In some examples, optionally, the minimum dimension of the battery device 100 is greater than or equal to 600 mm along any one of the first direction X, the second direction Y, and the third direction Z; and / or, the weight of the battery device 100 is greater than or equal to 200 kg.

[0202] The above technical solutions include multiple implementation methods. For example, the minimum size of the battery device 100 may be greater than or equal to 600 mm, and the weight of the battery may be unlimited. Another method is that the weight of the battery device 100 may be greater than or equal to 200 kg, and the size of the battery device 100 may be unlimited. Yet another method is that the minimum size of the battery device 100 may be greater than or equal to 600 mm, and the weight of the battery device 100 may be greater than or equal to 200 kg.

[0203] When the weight or size of the battery device 100 meets any of the above requirements, a first connecting structure 40 needs to be provided in the middle part 101 of the battery device 100. The reason is that the size of the battery device 100 under this size or weight is relatively large, and the middle part 101 is prone to vibration. When the first connecting structure 40 is provided in the middle part 101, the possibility of vibration of the middle part 101 of the battery device 100 under this size can be effectively reduced.

[0204] In some embodiments, the first connection structure 40 described above may be provided on the battery device 100 when the size of any one of the first direction X, the second direction Y and the third direction Z is greater than or equal to 1000mm to 2000mm, such as 1000mm, 1200mm, 1500mm, 1800mm and 2000mm.

[0205] In some embodiments, the first connection structure 40 described above may be provided on the battery device 100 when the weight of the battery device 100 is greater than or equal to 600 kg.

[0206] Finally, please see the appendix. Figure 2-11As shown, this application embodiment provides a battery device 100, including a battery housing 10 and battery cells 20 installed in the battery housing 10. The battery housing 10 includes a first wall 11 and a second wall 12 opposite to each other, and a side wall 13 connecting the first wall 11 and the second wall 12. The first wall 11, the second wall 12 and the side wall 13 together form the inner cavity of the battery housing 10. Along a first direction X intersecting the arrangement direction of the first wall 11 to the second wall 12, the battery device 100 includes a middle part 101 and side parts 102 located on both sides of the middle part 101. The size of the middle part 101 along the first direction X is greater than or equal to the size of each side part 102 along the first direction X. The middle part 101 is provided with at least one first connecting structure 40. The first connecting structure 40 passes through the first wall 11, the inner cavity of the battery housing 10 and the second wall 12, and is used to connect electrical equipment. The first connecting structure 40 includes a first connecting portion 41 disposed on the first wall 11 and a second connecting portion 42 disposed on the second wall 12. The first connecting portion 41 and the second connecting portion 42 are aligned along a second direction Y, where the second direction Y is the arrangement direction from the first wall 11 to the second wall 12. The battery device 100 also includes a heat exchanger 30 located within the battery housing 10. The heat exchanger 30 is connected to either the first wall 11 or the second wall 12. The first connecting structure 40 includes a third connecting portion 43 penetrating through the heat exchanger 30, located between the first connecting portion 41 and the second connecting portion 42. The first connecting portion 41 includes a first connecting hole 411, the second connecting portion 42 includes a second connecting hole 421, and the third connecting portion 43 includes a third connecting hole 431, which communicates with both the first connecting hole 411 and the second connecting hole 421. The first connecting structure 40 further includes a first connecting member 44, which passes through and connects to the first connecting hole 411, the second connecting hole 421, and the third connecting hole 431. The first connecting member 44 is used to connect electrical equipment. The first connecting hole 411, the second connecting hole 421, and the third connecting hole 431 are all oblong holes. The first connecting member 44 is a cylindrical member with open ends and a hollow interior. The first connecting structure 40 also includes a second connecting member 45, which passes through the first connecting member 44. The first connecting member 44 is connected to the electrical equipment through the second connecting member 45. The minimum diameter of the first connecting hole 411, the second connecting hole 421, and the third connecting hole 431 are 10mm-50mm. The minimum diameter of the first connecting hole 411, the second connecting hole 421, and the third connecting hole 431 are 15mm-30mm. The heat exchanger 30 has a heat exchange medium flow channel 34 inside, which is offset from the third connection part 43 in the second direction Y. The minimum distance between the heat exchange medium flow channel 34 and the third connection part 43 is greater than or equal to 5 mm. The minimum distance between the heat exchange medium flow channel 34 and the third connection part 43 is less than or equal to 40 mm.The heat exchange medium flow channel 34 has a clearance section 341 facing the third connection portion 43, and the clearance section 341 is recessed in the direction away from the third connection portion 43. The clearance section 341 is an arc segment. The battery housing 10 also includes a support beam connecting two opposite side walls 13. The first connection structure 40 includes a fourth connection portion passing through the support beam, and the fourth connection portion is located between the first connection portion 41 and the third connection portion 43. There are multiple first connection structures 40, which are arranged at intervals along a first direction X and / or a third direction Z. The third direction Z intersects the first direction X and the arrangement direction of the first wall 11 to the second wall 12, respectively. The multiple first connection structures 40 are arranged at intervals along the third direction Z, and the minimum distance between two adjacent first connection structures 40 along the third direction Z is 100mm-2000mm. The minimum distance between two adjacent first connection structures 40 along the third direction Z is 300mm-1000mm. A first connecting structure 40 is disposed on a first centerline 103 of the battery device 100 along a first direction X, and / or, the first connecting structure 40 is disposed on a second centerline 104 of the battery device 100 along a third direction Z, the third direction Z intersecting the first direction X and the arrangement direction of the first wall 11 to the second wall 12 respectively. The side portion 102 is provided with at least one second connecting structure, which is also used to connect electrical equipment. Along any one of the first direction X, the second direction Y, and the third direction Z, the minimum dimension of the battery device 100 is greater than or equal to 600 mm; and / or, the weight of the battery device 100 is greater than or equal to 200 kg.

[0207] 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.

[0208] Combined again with the appendix Figure 1 As shown, based on the battery device 100 described above, this application embodiment also provides an electrical device, including the battery device 100 described above. The battery device 100 is used to provide electrical energy or store electrical energy for the electrical device, which may be a vehicle 1000.

[0209] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended 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 they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for the intermediate technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A battery device, characterized in that, The device includes a battery housing and battery cells installed within the battery housing. The battery housing includes a first wall and a second wall opposite to each other, and a side wall connecting the first wall and the second wall. The first wall, the second wall, and the side wall together form the inner cavity of the battery housing. Along a first direction intersecting the arrangement direction of the first wall to the second wall, the battery device includes a central portion and side portions located on both sides of the central portion. The dimension of the central portion along the first direction is greater than or equal to the dimension of each side portion along the first direction. The central portion is provided with at least one first connecting structure, which penetrates the first wall, the inner cavity, and the second wall, and is used to connect electrical equipment.

2. The battery device according to claim 1, characterized in that, The first connection structure includes a first connection portion disposed on the first wall and a second connection portion disposed on the second wall. The first connection portion and the second connection portion are aligned along a second direction, which is the arrangement direction from the first wall to the second wall.

3. The battery device according to claim 2, characterized in that, The battery device further includes a heat exchanger located inside the battery housing. The heat exchanger is connected to the first wall or the second wall. The first connection structure includes a third connection portion passing through the heat exchanger. The third connection portion is located between the first connection portion and the second connection portion.

4. The battery device according to claim 3, characterized in that, The first connecting part includes a first connecting hole, the second connecting part includes a second connecting hole, and the third connecting part includes a third connecting hole, which is connected to the first connecting hole and the second connecting hole respectively.

5. The battery device according to claim 4, characterized in that, The first connection structure further includes a first connector, which is connected through the first connection hole, the second connection hole and the third connection hole, and is used to connect the electrical equipment.

6. The battery device according to claim 5, characterized in that, The first connecting hole, the second connecting hole, and the third connecting hole are all oblong holes.

7. The battery device according to claim 5, characterized in that, The first connector is a cylindrical part with open ends and hollow interior. The first connection structure also includes a second connector, which passes through the first connector. The first connector is connected to the electrical equipment through the second connector.

8. The battery device according to claim 4, characterized in that, The minimum diameter of the first connecting hole, the minimum diameter of the second connecting hole, and the minimum diameter of the third connecting hole are 10mm-50mm, respectively.

9. The battery device according to claim 8, characterized in that, The minimum diameters of the first connecting hole, the second connecting hole, and the third connecting hole are 15mm-30mm, respectively.

10. The battery device according to claim 3, characterized in that, The heat exchanger has a heat exchange medium flow channel inside, and the heat exchange medium flow channel and the third connection part are offset from each other in the second direction.

11. The battery device according to claim 10, characterized in that, The minimum distance between the heat exchange medium channel and the third connection part is greater than or equal to 5 mm.

12. The battery device according to claim 11, characterized in that, The minimum distance between the heat exchange medium channel and the third connection part is less than or equal to 40 mm.

13. The battery device according to claim 10, characterized in that, The heat exchange medium flow channel has a clearance section facing the third connection portion, and the clearance section is recessed in a direction away from the third connection portion.

14. The battery device according to claim 13, characterized in that, The avoidance section is an arc segment.

15. The battery device according to any one of claims 3-14, characterized in that, The battery housing includes a support beam connected between two opposing side walls, and the first connection structure includes a fourth connection portion passing through the support beam, the fourth connection portion being located between the first connection portion and the third connection portion.

16. The battery device according to claim 1, characterized in that, The number of the first connection structures is multiple, and the multiple first connection structures are arranged at intervals along the first direction and / or a third direction, the third direction intersecting the first direction and the arrangement direction from the first wall to the second wall respectively.

17. The battery device according to claim 16, characterized in that, Multiple first connecting structures are arranged at intervals along the third direction, and the minimum distance between two adjacent first connecting structures along the third direction is 100mm-2000mm.

18. The battery device according to claim 17, characterized in that, The minimum distance between two adjacent first connection structures along the third direction is 300mm-1000mm.

19. The battery device according to any one of claims 1-14, characterized in that, The first connection structure is disposed on a first centerline of the battery device along the first direction, and / or the first connection structure is disposed on a second centerline of the battery device along a third direction, the third direction intersecting the first direction and the arrangement direction of the first wall to the second wall respectively.

20. The battery device according to any one of claims 1-14, characterized in that, The side portion is provided with at least one second connection structure, which is used to connect the electrical equipment.

21. The battery device according to any one of claims 1-14, characterized in that, Along any one of the first, second, and third directions, the minimum dimension of the battery device is greater than or equal to 600 mm; and / or, the weight of the battery device is greater than or equal to 200 kg.

22. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-21, the battery device being used to provide electrical energy or store electrical energy.

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