Battery device and electric appliance

Abstract

The application relates to a battery device and an electric equipment. The battery device comprises a box body, a partition plate, a first battery pack and a second battery pack. The partition plate is arranged in the box body and divides the box body into a first cavity and a second cavity which are adjacent along a first direction. The first battery pack is arranged in the first cavity, and the second battery pack is arranged in the second cavity. A first cooling flow channel for cooling medium is arranged in the partition plate. The battery device and the electric equipment have the following advantages. The partition plate with the first cooling flow channel is arranged in the box body. The partition plate divides the box body into two cavities which are adjacent along the height direction of the box body. The first battery pack and the second battery pack are arranged in the two cavities respectively, so that the first battery pack and the second battery pack are stacked along the height direction of the box body and share the same partition plate for cooling and heat dissipation. An auxiliary heat dissipation structure is not needed, the structure of the battery device is simplified, the weight is reduced, and the volume energy density of the battery device is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and electrical equipment. Background Technology

[0002] With the popularization and promotion of new energy vehicles, their charging and discharging performance and range have increasingly attracted people's attention and importance. As the power source for new energy vehicles, batteries are widely used.

[0003] Currently, batteries are typically installed in a single-layer configuration. However, when the power requirements of the device are high (e.g., to increase battery life), the battery needs to make full use of vertical space, and if necessary, a double-layer configuration can be used to stack battery modules vertically. In a double-layer battery module, each layer needs to be equipped with a cooling mechanism, which complicates the assembly structure, increases the overall weight of the battery, and is not conducive to improving the volumetric energy density of the battery. Utility Model Content

[0004] Therefore, it is necessary to provide a battery device and electrical equipment to address the problems of complex battery assembly structures and heavy overall weight of existing batteries with dual-layer battery packs.

[0005] A battery device includes a housing, a separator, a first battery pack, and a second battery pack. The separator is disposed inside the housing and divides the interior of the housing into a first cavity and a second cavity adjacent to each other along a first direction, which is the height direction of the housing. The first battery pack is disposed in the first cavity, and the second battery pack is disposed in the second cavity. The separator has a first cooling channel for the flow of a cooling medium. In this battery device, the separator with the first cooling channel within the housing divides the interior of the housing into two adjacent cavities along the height direction of the housing. The first battery pack and the second battery pack are respectively disposed in the two cavities, allowing the first and second battery packs to be stacked along the height direction of the housing and sharing the same separator for cooling and heat dissipation. This eliminates the need for additional auxiliary heat dissipation structures, simplifies the overall structure of the battery device, reduces weight, improves the space utilization along the height direction of the housing, and is beneficial for increasing the volumetric energy density of the battery device.

[0006] In some embodiments, the separator and the housing are an integral structure. This integrated molding simplifies the overall structure of the battery device, reduces weight, improves space utilization in the height direction of the housing, and helps to increase the volumetric energy density of the battery device.

[0007] In some embodiments, the separator has a first surface and a second surface disposed opposite to each other along a first direction. The side of the first battery pack facing away from its own electrode terminals abuts against the first surface, and the side of the second battery pack facing away from its own electrode terminals abuts against the second surface. This arrangement simplifies the separator structure and increases the contact area between the separator and each battery pack, facilitating rapid cooling and heat dissipation for each battery pack.

[0008] In some embodiments, the first cavity has a first closed end and a first open end disposed opposite each other along a first direction, and the first surface is configured as the first closed end; the battery device further includes a first cover, which is disposed on the first open end. Thus, the first cover, disposed on the first open end, together with the housing, defines a closed first cavity to facilitate the first cavity accommodating the first battery pack.

[0009] In some embodiments, the first cover includes a first connecting portion and a second connecting portion surrounding the outer periphery of the first connecting portion, with one end of the second connecting portion away from the first connecting portion connected to the housing. Thus, the cover, together with the housing, defines a closed first cavity. The first cover has a simple structural design and facilitates the first cavity in accommodating the first battery pack.

[0010] In some embodiments, in the first direction, the height of the second connecting portion is greater than or equal to the height of the sidewall of the first cavity; the end of the second connecting portion away from the first connecting portion is located outside the sidewall of the first cavity and is detachably connected to the sidewall of the first cavity. Thus, having the end of the second connecting portion away from the first connecting portion located outside the sidewall of the first cavity and detachably connected to the sidewall of the first cavity allows for the fixation of the first cover and the housing, while simultaneously improving the connection strength and stability of the first cover and the housing.

[0011] In some embodiments, the end of the second connecting portion away from the first connecting portion is provided with a first fixing hole, and the side wall of the first cavity is provided with a second fixing hole. The first fixing hole and the second fixing hole are flush with the partition in a first direction. The battery device also includes a first fastener, which passes through the first fixing hole and the second fixing hole. In this way, after the first fastener passes through the first fixing hole and the second fixing hole, it can extend further into the partition if the length space is insufficient, which can provide sufficient installation space for locking the first fastener, so that the second connecting portion of the first cover and the housing are effectively fixed.

[0012] In some embodiments, the second cavity has a second closed end and a second open end disposed opposite each other along a first direction, and the second surface is configured as the second closed end; the battery device also includes a second cover that covers the second open end. Thus, the second cover, together with the housing, defines a closed second cavity to facilitate the second cavity accommodating the second battery pack.

[0013] In some embodiments, the second cover is constructed as a planar plate structure, and the cross-sectional area of ​​the second cover is greater than or equal to the cross-sectional area of ​​the second opening end. Thus, the second cover closes onto the second opening end of the second cavity, thereby defining a closed second cavity together with the housing, facilitating the second cavity's reception of the second battery pack.

[0014] In some embodiments, the battery device further includes a positioning element disposed between the second battery pack and the second cover, which supports the second battery pack. Thus, during assembly, when the housing is flipped over, the positioning element can assist in supporting the second battery pack within the second cavity, mitigating the risk of the second battery pack shifting downwards and detaching from the housing due to flipping, thereby effectively improving the structural strength of the product.

[0015] In some embodiments, the side of the second battery pack facing away from the second surface has two edge portions disposed opposite each other along a second direction, and each edge portion is provided with at least one positioning member, the second direction being the width direction of the housing. Thus, by providing a positioning member on the edge portion of the second battery pack facing away from the second surface, the positioning member can assist in supporting the second battery pack 400 within the second cavity, improving the situation where the second battery pack shifts downwards due to housing rotation and becomes detached from the housing.

[0016] In some embodiments, a second cooling channel for the flow of cooling medium is provided inside the casing. Thus, by providing a second cooling channel inside the casing, the cooling efficiency of each battery pack can be further accelerated.

[0017] An electrical device includes the aforementioned battery device. The device has a partition with a first cooling channel inside its housing. The partition divides the housing into two adjacent cavities along the height direction of the housing. A first battery pack and a second battery pack are respectively disposed in the two cavities, allowing the first and second battery packs to be stacked along the height direction of the housing and sharing the same partition for cooling. This eliminates the need for additional auxiliary cooling structures, simplifies the overall structure of the battery device, reduces weight, improves space utilization along the height direction of the housing, and helps to increase the volumetric energy density of the battery device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the electrical equipment in some embodiments of this application.

[0019] Figure 2 This is a schematic diagram of a battery device in some embodiments of this application.

[0020] Figure 3 for Figure 2 Exploded view of the battery device shown.

[0021] Figure 4 for Figure 2 A schematic diagram of the internal structure of the battery device shown.

[0022] Figure 5 for Figure 4 A cross-sectional view of the casing in the battery device shown.

[0023] Figure 6 for Figure 2 A schematic diagram of the second battery pack and positioning components in the battery device shown.

[0024] Figure 7 for Figure 2 A schematic diagram showing the combination of the battery device, the first packaging material, and the second packaging material.

[0025] Figure label:

[0026] 10. Vehicle; 11. Controller; 12. Motor; 20. Battery; 21. Battery cell; 30. First packaging material; 40. Second packaging material; 100. Housing; 110. First cavity; 110a. Second fixing hole; 111. First closed end; 112. First open end; 120. Second cavity; 121. Second closed end; 122. Second open end; 200. Separator; 201. First surface; 202. Second surface; 300. First battery pack; 400. Second battery pack; 401. Edge; 500. First cover; 510. First connecting part; 520. Second connecting part; 521. First fixing hole; 600. First fastener; 700. Second cover; 800. Positioning element. Detailed Implementation

[0027] 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.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0029] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0030] In this document, the term "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 throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0031] In the description of the embodiments 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, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0032] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0033] 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," and "circumferential" 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 are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0034] In the description of the embodiments of this application, unless otherwise expressly specified and limited, 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.

[0035] With the popularization and promotion of new energy vehicles, their charging and discharging performance and range are increasingly attracting attention and importance. Power batteries, a type of rechargeable battery, are the power source for new energy vehicles and are widely used in the field.

[0036] Currently, batteries are typically installed in a single-layer configuration. However, when the power requirements of the device are high (e.g., to increase battery life), the battery needs to make full use of vertical space, and if necessary, a double-layer configuration can be used to stack battery modules vertically. In a double-layer battery module, each layer needs to be equipped with a cooling mechanism, which complicates the assembly structure, increases the overall weight of the battery, and is not conducive to improving the volumetric energy density of the battery.

[0037] Based on the above considerations, and after in-depth research, a battery device and electrical equipment were designed. In the battery device, a partition with a first cooling channel is provided inside the housing. The partition divides the interior of the housing into two adjacent cavities distributed along the height direction of the housing. The first battery pack and the second battery pack are respectively located in the two cavities, so that the first battery pack and the second battery pack are stacked in the height direction of the housing and share the same partition for cooling and heat dissipation. There is no need for a separate auxiliary heat dissipation structure, which simplifies the overall structure of the battery device, reduces the weight, improves the space utilization rate in the height direction of the housing, and helps to improve the volumetric energy density of the battery device.

[0038] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0039] For ease of explanation, the following embodiments will be described using a vehicle 10 as an example of an electrical device according to an embodiment of this application.

[0040] Please refer to Figure 1Vehicle 10 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 20 is installed inside vehicle 10, and the battery device 20 can be located at the bottom, front, or rear of vehicle 10. The battery device 20 can be used to power vehicle 10; for example, it can serve as the operating power source for vehicle 10. Vehicle 10 may also include a controller 11 and a motor 12. The controller 11 controls the battery device 20 to supply power to the motor 12, for example, to meet the power needs of vehicle 10 during starting, navigation, and driving. In other embodiments of this application, the battery device 20 can not only serve as the operating power source for vehicle 10 but also as the driving power source for vehicle 10, replacing or partially replacing gasoline or natural gas to provide driving force for vehicle 10.

[0041] Please refer to Figures 1 to 4 In one embodiment, the battery device 20 includes a housing 100, a partition 200, a first battery pack 300, and a second battery pack 400. The partition 200 is disposed inside the housing 100 and divides the interior of the housing 100 into a first cavity 110 and a second cavity 120 that are adjacent to each other along a first direction, the first direction being the height direction of the housing 100. The first battery pack 300 is disposed in the first cavity 110, and the second battery pack 400 is disposed in the second cavity 120. The partition 200 is provided with a first cooling channel for the flow of cooling medium.

[0042] It should be noted that the first direction is Figure 4 The X direction shown is the height direction of the housing 100. The first cavity 110 and the second cavity 120, which are adjacent to each other along the first direction, can be understood as follows: the first cavity 110 and the second cavity 120 are adjacent to each other in the first direction but not connected. The first cavity 110 and the second cavity 120 share the same partition 200, which constitutes both the cavity wall of the first cavity 110 and the cavity wall of the first cavity 110.

[0043] In the embodiments of this application, the first cavity 110 and the second cavity 120 are arranged in an adjacent manner, for example, in the first direction, the first cavity 110 is located above and the second cavity 120 is located below; or, the first cavity 110 is located below and the second cavity 120 is located above.

[0044] In the embodiments of this application, the housing 100 is a component used to provide housing space for each battery pack, and the housing 100 can adopt various structures. For example, the housing 100 is a hollow structure with openings at both ends, and two cover plates are used to close the two open sides of the housing 100 to define a closed housing space. The housing 100 can be in the shape of a hollow cylinder, a hollow prism, or other shapes, and no specific limitation is made here.

[0045] In the embodiments of this application, the partition 200 is disposed inside the housing 100 and divides the interior of the housing 100 into a first cavity 110 and a second cavity 120 distributed adjacently along a first direction. The partition 200 and the housing 100 can be an integral structure, for example, integrally formed by injection molding, casting, or other methods; the partition 200 and the housing 100 can also be a separate structure, for example, the partition 200 and the housing 100 can be fixed by plugging, riveting, or other methods. The partition 200 is provided with a first cooling channel for the flow of cooling medium. The first cooling channel can have various structural forms, for example, the first cooling channel can be an S-shaped tortuous channel or other shapes. The cooling medium can be a liquid substance or a solid-liquid mixture, and the type of cooling medium is not limited here.

[0046] In the embodiments of this application, the first battery pack 300 and the second battery pack 400 each include at least one battery cell 21. When multiple battery cells 21 are included, they can be connected in series, in parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 21 are connected in both series and parallel. Multiple battery cells 21 can be directly connected in series, in parallel, or in a mixed configuration, and then the whole assembly of multiple battery cells 21 is housed in the housing 100. Of course, the battery device 20 can also be formed by first connecting multiple battery cells 21 in series, in parallel, or in a mixed configuration to form a battery pack, and then connecting multiple battery packs in series, in parallel, or in a mixed configuration to form a whole assembly, which is housed in the housing 100.

[0047] Each battery cell 21 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 21 can be cylindrical, flat, cuboid, or other shapes. In some embodiments of this application, the battery cell 21 may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., but this application does not limit this. The battery cell 21 can be cylindrical, flat, cuboid, or other shapes, but this application does not limit this.

[0048] The aforementioned battery device 20 has a partition 200 with a first cooling channel inside the housing 100. The partition 200 divides the interior of the housing 100 into two adjacent cavities along the height direction of the housing 100. The first battery pack 300 and the second battery pack 400 are respectively disposed in the two cavities, so that the first battery pack 300 and the second battery pack 400 are stacked in the height direction of the housing 100 and share the same partition 200 for cooling and heat dissipation. There is no need to set up an auxiliary heat dissipation structure, which simplifies the overall structure of the battery device 20, reduces the weight, improves the space utilization rate in the height direction of the housing 100, and helps to improve the volumetric energy density of the battery device 20.

[0049] Based on some embodiments in this application, please refer to Figure 3 The partition 200 and the box 100 are an integral structure.

[0050] In the embodiments of this application, the partition 200 and the box 100 can be integrally formed by injection molding, casting or other methods. The specific method of integral forming of the partition 200 and the box 100 is not limited here.

[0051] With the above configuration, the separator 200 and the housing 100 are integrally formed, which simplifies the overall structure of the battery device 20 and reduces its weight, improves the space utilization rate in the height direction of the housing 100, and helps to improve the volumetric energy density of the battery device 20.

[0052] Based on some embodiments in this application, please refer to Figure 5 and Figure 4 The separator 200 has a first surface 201 and a second surface 202 disposed opposite to each other along a first direction. The side of the first battery pack 300 away from its own electrode terminals abuts against the first surface 201, and the side of the second battery pack 400 away from its own electrode terminals abuts against the second surface 202.

[0053] It should be noted that the first battery pack 300 has an edge... Figure 4 The first and second sides shown are arranged opposite to each other in the X direction. The first side is the side where the electrode terminals of the first battery pack 300 are located, and the second side is the side of the first battery pack 300 away from its own electrode terminals. The second side of the first battery pack 300 abuts against the first surface 201 of the separator 200. The second battery pack 400 has a... Figure 4 The third and fourth sides are arranged opposite to each other in the X direction. The third side is the side where the electrode terminals of the second battery pack 400 are located, and the fourth side is the side of the second battery pack 400 that is away from its own electrode terminals. The fourth side of the second battery pack 400 abuts against the first surface 201 of the separator 200.

[0054] In the embodiments of this application, since the side of the first battery pack 300 away from its own electrode terminals is a planar structure, the first surface 201 of the separator 200 is also a planar structure, so that the side of the first battery pack 300 away from its own electrode terminals fits better with the first surface 201, increasing the contact area between the two, which is beneficial for the separator 200 to quickly cool down and dissipate heat for the first battery pack 300.

[0055] In the embodiments of this application, since the side of the second battery pack 400 away from its own electrode terminals is a planar structure, the second surface 202 of the separator 200 is also a planar structure, so that the side of the second battery pack 400 away from its own electrode terminals fits better with the second surface 202, increasing the contact area between the two, which is beneficial for the separator 200 to quickly cool down and dissipate heat for the second battery pack 400.

[0056] With the above arrangement, the side of the first battery pack 300 away from its own electrode terminals abuts against the first surface 201, and the side of the second battery pack 400 away from its own electrode terminals abuts against the second surface 202. This simplifies the structure of the separator 200 and increases the contact area between the separator 200 and each battery pack, which is beneficial for the separator 200 to quickly cool down and dissipate heat for each battery pack.

[0057] Based on some embodiments in this application, please refer to Figure 5 and Figure 4 The first cavity 110 has a first closed end 111 and a first open end 112 disposed opposite to each other along a first direction, and the first surface 201 is configured as the first closed end 111; the battery device 20 also includes a first cover 500, which covers the first open end 112.

[0058] It should be noted that the first cavity 110 is used to accommodate the first battery pack 300. When the first opening end 112 is in the open state, the first battery pack 300 is first placed into the first cavity 110 through the first opening end 112, and the first battery pack 300 contacts the first closed end 111. Then, the first cover 500 is placed on the first opening end 112 and fixed to the housing 100. At this time, the first opening end 112 is in the closed state.

[0059] In the embodiments of this application, the opening of the first cavity 110 faces upward, the first surface 201 of the partition 200 is configured as a first closed end 111, and the first open end 112 is the end of the first cavity 110 away from the first surface 201 of the partition 200.

[0060] In the embodiments of this application, the first cover 500 is disposed on the first opening end 112. The first cover 500 can be fixed in a variety of ways. For example, the first cover 500 is a U-shaped hollow structure with one end open. The first cover 500 covers the first opening end 112 of the first cavity 110 so as to define the closed first cavity 110 together with the box body 100. Alternatively, the first cover 500 can also be an I-shaped flat plate structure. The first cover 500 covers the first opening end 112 of the first cavity 110 so as to define the closed first cavity 110 together with the box body 100.

[0061] With the above configuration, the first cover 500 is placed on the first opening end 112, and the first cover 500 and the box 100 together define a closed first cavity 110, so as to facilitate the first cavity 110 to accommodate the first battery pack 300.

[0062] Based on some embodiments in this application, please refer to Figure 5 and Figure 4The first cover 500 includes a first connecting portion 510 and a second connecting portion 520 surrounding the outer periphery of the first connecting portion. The end of the second connecting portion 520 away from the first connecting portion 510 is connected to the box body 100.

[0063] It should be noted that the second connecting part 520 and the first connecting part 510 form a hollow structure with one end open. The first cover 500 covers the first opening end 112 of the first cavity 110, or the first cover 500 is connected to the first opening end 112 of the first cavity 110, so that the first cover 500 and the box body 100 together define the closed first cavity 110.

[0064] In the embodiments of this application, the first connecting part 510 is a component of the first cover 500. The first connecting part 510 can adopt various structural forms. Preferably, the first connecting part 510 is a flat plate structure.

[0065] In the embodiments of this application, the second connecting portion 520 is a component of the first cover 500. The second connecting portion 520 and the first connecting portion 510 can be connected in various ways. For example, the second connecting portion 520 and the first connecting portion 510 can be an integral structure, formed by casting, injection molding, or other methods. Alternatively, the second connecting portion 520 and the first connecting portion 510 can be separate structures, formed by snap-fitting, riveting, or other methods. The second connecting portion 520 can be connected to the housing 100 in various ways, such as by bolts or screws. Preferably, the second connecting portion 520 has a flat plate structure.

[0066] With the above configuration, the first cover 500 and the box 100 together define a closed first cavity 110. The structure of the first cover 500 is simple and facilitates the first cavity 110 to accommodate the first battery pack 300.

[0067] Based on some embodiments in this application, please refer to Figure 3 In the first direction, the height of the second connecting portion 520 is greater than or equal to the height of the side wall of the first cavity 110; the end of the second connecting portion 520 away from the first connecting portion 510 is located outside the side wall of the first cavity 110 and is detachably connected to the side wall of the first cavity 110.

[0068] It is understandable that, in the first direction, the height of the second connecting portion 520 is greater than or equal to the height of the sidewall of the first cavity 110, that is: the second connecting portion 520 is in Figure 4 The sidewall of the first cavity 110, whose dimension in the X direction is greater than or equal to that of the sidewall in the X direction, is shown. Figure 4 The dimension in the X direction is shown.

[0069] In the embodiments of this application, the end of the second connecting part 520 away from the first connecting part 510 is located outside the side wall of the first cavity 110. That is, the two second connecting parts 520 and the first connecting part 510 form a U-shaped hollow structure with one end open. The first cover 500 covers the first opening end 112 of the first cavity 110, and the end of the second connecting part 520 away from the first connecting part 510 is attached to the side wall of the first cavity 110 so that the second connecting part 520 can be detachably connected to the box 100.

[0070] In the embodiments of this application, the end of the second connecting part 520 away from the first connecting part 510 and the side wall of the first cavity 110 can be detachably connected in various ways, such as by snap-fit ​​or plug-in.

[0071] With the above configuration, the end of the second connecting part 520 away from the first connecting part 510 is located outside the side wall of the first cavity 110 and is detachably connected to the side wall of the first cavity 110, which can fix the first cover 500 and the box 100, and at the same time improve the connection strength and stability of the first cover 500 and the box 100.

[0072] Based on some embodiments in this application, please refer to Figure 4 The second connecting part 520 is provided with a first fixing hole 521 at one end away from the first connecting part 510, and the side wall of the first cavity 110 is provided with a second fixing hole 110a. The first fixing hole 521 and the second fixing hole 110a are flush with the partition 200 in the first direction. The battery device 20 also includes a first fastener 600, which passes through the first fixing hole 521 and the second fixing hole 110a.

[0073] It should be noted that both the first fixing hole 521 and the second fixing hole 110a are screw holes, and the first fastener 600 is a bolt or screw. By rotating the first fastener 600, the insertion length of the first fastener 600 can be adjusted, thereby adjusting the locking degree of the second connecting part 520 of the first cover 500 and the box 100.

[0074] In the embodiments of this application, the first fixing hole 521 is disposed along the second direction at one end of the second connecting portion 520 away from the first connecting portion 510. The first fixing hole 521 is a circular screw hole, and the number of the first fixing holes 521 is not limited to one.

[0075] In the embodiments of this application, the second fixing hole 110a is disposed along the second direction in the side wall of the first cavity 110. The second fixing hole 110a is a circular screw hole, and the number of the second fixing holes 110a is not limited to one.

[0076] With the above configuration, after the first fastener 600 passes through the first fixing hole 521 and the second fixing hole 110a, if the length space is insufficient, it can extend further into the partition 200, which can provide sufficient installation space for the locking of the first fastener 600, so that the second connecting part 520 of the first cover 500 and the box 100 are effectively fixed.

[0077] Based on some embodiments in this application, please refer to Figure 4 The second cavity 120 has a second closed end 121 and a second open end 122 disposed opposite to each other along a first direction, and the second surface 202 is configured as the second closed end 121; the battery device 20 also includes a second cover 700, which covers the second open end 122.

[0078] It should be noted that the second cavity 120 is used to accommodate the second battery pack 400. When the second opening end 122 is in the open state, the second battery pack 400 is first placed into the second cavity 120 through the second opening end 122, and the second battery pack 400 contacts the second closed end 121. Then, the second cover 700 is placed on the second opening end 122 and fixed to the housing 100. At this time, the second opening end 122 is in the closed state.

[0079] In the embodiments of this application, the opening of the second cavity 120 faces upward, the second surface 202 of the partition 200 is configured as the second closed end 121, and the second open end 122 is the end of the second cavity 120 away from the second surface 202 of the partition 200.

[0080] In the embodiments of this application, the second cover 700 is disposed on the second opening end 122. The second cover 700 can be fixed in a variety of ways. For example, the second cover 700 is a U-shaped hollow structure with one end open. The second cover 700 covers the second opening end 122 of the second cavity 120 to jointly define the closed second cavity 120 with the box body 100. Alternatively, the second cover 700 can also be an I-shaped flat plate structure. The second cover 700 covers the second opening end 122 of the second cavity 120 to jointly define the closed second cavity 120 with the box body 100.

[0081] With the above arrangement, the second cover 700 is placed on the second opening end 122, and the second cover 700 and the box 100 together define a closed second cavity 120, so as to facilitate the second cavity 120 to accommodate the second battery pack 400.

[0082] Based on some embodiments in this application, please refer to Figure 4 The second cover is constructed as a planar plate structure, and the cross-sectional area of ​​the second cover 700 is greater than or equal to the cross-sectional area of ​​the second opening end 122.

[0083] In the embodiments of this application, the second cover 700 is an I-shaped flat plate structure. The second cover 700 covers the second opening end 122 of the second cavity 120, so as to jointly define a closed second cavity 120 with the box body 100. The second cover 700 and the box body 100 can be fixed in a variety of ways, such as by adhesive or riveting.

[0084] With the above arrangement, the second cover 700 covers the second opening end 122 of the second cavity 120, so as to define the closed second cavity 120 together with the box 100, which is conducive to the second cavity 120 accommodating the second battery pack 400.

[0085] Based on some embodiments in this application, please refer to Figure 4 and Figure 6 The battery device 20 also includes a positioning member 800, which is located between the second battery pack 400 and the second cover 700 and is used to support the second battery pack 400.

[0086] It should be noted that, in conjunction with references Figure 7 During assembly, the second cavity 120 of the housing 100 is usually placed facing upwards first. After the second battery pack 400 is installed in the second cavity 120, the positioning component 800 is installed, and then the second cover 700 is closed. Then the housing 100 is flipped over so that the first cavity 110 of the housing 100 faces upwards. After the first battery pack 300 is installed in the first cavity 110, the first cover 500 is closed. Finally, the first packaging material 30 and the second packaging material 40 are covered around the battery device 20. The second packaging material 40 is installed on the connecting lug of the housing 100, and the first packaging material 30 is fixed to the second packaging material 40 to form a closed accommodating space, so that the battery device 20 can be accommodated in the closed accommodating space for subsequent packaging and transportation.

[0087] In the embodiments of this application, the positioning member 800 is a component disposed between the second battery pack 400 and the second cover 700, and used to support the second battery pack 400. The positioning member 800 cannot undergo elastic deformation and needs to have a certain degree of hardness. For example, the positioning member 800 can be a strip structure composed of fiber-reinforced composite material. The number of positioning members 800 is not limited to one.

[0088] With the above settings, when the housing 100 is flipped during assembly, the positioning component 800 can assist in supporting the second battery pack 400 in the second cavity 120, which improves the situation where the second battery pack 400 moves down and becomes detached from the housing 100 due to the flipping of the housing 100, and can effectively improve the structural strength of the product.

[0089] Based on some embodiments in this application, please refer to Figure 4 and Figure 6The second battery pack 400 has two edge portions 401 disposed opposite to each other along a second direction on the side opposite to the second surface 202. Each edge portion 401 is provided with at least one positioning member 800. The second direction is the width direction of the housing 100.

[0090] It should be noted that the second direction is Figure 4 and Figure 6 The second battery pack 400 has two edge portions 401 disposed opposite each other along the second direction on the side opposite to the second surface 202, that is: in the Y direction. Figure 4 and Figure 6 In the Y direction shown, the second battery pack 400 has two edge portions 401 on the side opposite to the second surface 202, and the two edge portions 401 are in Figure 4 and Figure 6 The Y-axis is shown to be set relative to each other and spaced apart.

[0091] In the embodiments of this application, any edge portion 401 is provided with at least one positioning member 800, wherein the positioning member 800 is located between the side of any edge portion 401 away from the second surface 202 and the second cover 700. When the number of positioning members 800 is at least two, each positioning member 800 can be distributed side by side at intervals along the same direction.

[0092] With the above configuration, by providing a positioning member 800 on the edge 401 of the second battery pack 400 on the side opposite to the second surface 202, the positioning member 800 can assist in supporting the second battery pack 400 in the second cavity 120, thereby improving the situation where the second battery pack 400 moves downward and becomes detached from the housing 100 due to the flipping of the housing 100.

[0093] Based on some embodiments in this application, please refer to Figure 4 and Figure 6 The housing 100 is equipped with a second cooling channel for the flow of cooling medium.

[0094] In the embodiments of this application, the second cooling channel can take various structural forms, such as an S-shaped tortuous channel or other shapes.

[0095] With the above configuration, by setting a second cooling channel inside the housing 100, the cooling and heat dissipation efficiency of each battery pack can be further accelerated.

[0096] Based on some embodiments in this application, please refer to Figure 1 In one embodiment, the electrical device includes the battery device 20 described above.

[0097] It should be noted that, in addition to the battery device 20 mentioned above, the electrical equipment also includes components such as the vehicle frame, and the battery device 20 is mounted on the vehicle frame.

[0098] The aforementioned electrical equipment has a partition 200 with a first cooling channel inside the housing 100. The partition 200 divides the interior of the housing 100 into two adjacent cavities along the height direction of the housing 100. The first battery pack 300 and the second battery pack 400 are respectively located in the two cavities, so that the first battery pack 300 and the second battery pack 400 are stacked in the height direction of the housing 100 and share the same partition 200 for cooling and heat dissipation. There is no need to set up an auxiliary heat dissipation structure, which simplifies the overall structure of the battery device 20 and reduces its weight, improves the space utilization rate in the height direction of the housing 100, and helps to improve the volumetric energy density of the battery device 20.

[0099] According to some embodiments in this application, see Figures 1 to 7 In one embodiment, the battery device 20 includes a housing 100, a separator 200, a first battery pack 300, a second battery pack 400, a first cover 500, a second cover 700, and a positioning member 800. The housing 100 has a second cooling channel for the flow of cooling medium, and the separator 200 has a first cooling channel for the flow of cooling medium. The separator 200 is integrally formed inside the housing 100 and divides the interior of the housing 100 into first cavities distributed adjacent to each other along a first direction. 110 and the second cavity 120, the first direction is the height direction of the box 100; the first battery pack 300 is disposed in the first cavity 110, the second battery pack 400 is disposed in the second cavity 120, the first cover 500 covers the first opening end 112 of the first cavity 110, the second cover covers the second opening end 122 of the second cavity 120, and the positioning member 800 is disposed between the second battery pack 400 and the second cover 700 and is used to support the second battery pack 400.

[0100] The first cavity 110 has a first closed end 111 and a first open end 112 arranged opposite to each other in a first direction. The first surface 201 is constructed as the first closed end 111. The first cover 500 includes a first connecting part 510 and a second connecting part 520 surrounding the outer periphery of the first connecting part 510. The end of the second connecting part 520 away from the first connecting part 510 is provided with a first fixing hole 521. The side wall of the first cavity 110 is provided with a second fixing hole 110a. The first fixing hole 521 and the second fixing hole 110a are in the same position as the partition 200 in the first direction. The first fastener 600 passes through the first fixing hole 521 and the second fixing hole 110a.

[0101] According to some embodiments in this application, see Figure 1 One embodiment of the electrical device includes the battery device 20 described above.

[0102] 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 (20), characterized in that, include: Box (100); A partition (200) is disposed inside the box (100) and divides the inside of the box (100) into a first cavity (110) and a second cavity (120) distributed adjacent to each other along a first direction, wherein the first direction is the height direction of the box (100); The first battery pack (300) is disposed within the first cavity (110); The second battery pack (400) is disposed within the second cavity (120); The partition (200) is provided with a first cooling channel for the flow of cooling medium.

2. The battery device (20) according to claim 1, characterized in that, The partition (200) and the box (100) are an integral structure.

3. The battery device (20) according to claim 1, characterized in that, The partition (200) has a first surface (201) and a second surface (202) disposed opposite to each other along the first direction. The side of the first battery pack (300) away from its own electrode terminals abuts against the first surface (201), and the side of the second battery pack (400) away from its own electrode terminals abuts against the second surface (202).

4. The battery device (20) according to claim 3, characterized in that, The first cavity (110) has a first closed end (111) and a first open end (112) disposed opposite to each other along the first direction, and the first surface (201) is configured as the first closed end (111). The battery device (20) further includes a first cover (500) which covers the first opening end (112).

5. The battery device (20) according to claim 4, characterized in that, The first cover (500) includes a first connecting portion (510) and a second connecting portion (520) surrounding the outer periphery of the first connecting portion (510), wherein one end of the second connecting portion (520) away from the first connecting portion (510) is connected to the box body (100).

6. The battery device (20) according to claim 5, characterized in that, In the first direction, the height of the second connecting portion (520) is greater than or equal to the height of the sidewall of the first cavity (110); The end of the second connecting part (520) away from the first connecting part (510) is located outside the side wall of the first cavity (110) and is detachably connected to the side wall of the first cavity (110).

7. The battery device (20) according to claim 6, characterized in that, The second connecting part (520) is provided with a first fixing hole (521) at one end away from the first connecting part (510), and the side wall of the first cavity (110) is provided with a second fixing hole (110a). The first fixing hole (521), the second fixing hole (110a) and the partition (200) are flush in the first direction. The battery device (20) further includes a first fastener (600) which passes through the first fixing hole (521) and the second fixing hole (110a).

8. The battery device (20) according to claim 3, characterized in that, The second cavity (120) has a second closed end (121) and a second open end (122) disposed opposite to each other along the first direction, and the second surface (202) is configured as the second closed end (121). The battery device (20) further includes a second cover (700) which covers the second opening end (122).

9. The battery device (20) according to claim 8, characterized in that, The second cover (700) is constructed as a planar plate structure, and the cross-sectional area of ​​the second cover (700) is greater than or equal to the cross-sectional area of ​​the second opening end (122).

10. The battery device (20) according to claim 8, characterized in that, The battery device (20) further includes a positioning element (800), which is disposed between the second battery pack (400) and the second cover (700) and is used to support the second battery pack (400).

11. The battery device (20) according to claim 10, characterized in that, The second battery pack (400) has two edge portions (401) disposed opposite to each other along a second direction on the side away from the second surface (202), and each edge portion (401) is provided with at least one of the positioning elements (800), the second direction being the width direction of the housing (100).

12. The battery device (20) according to claim 1, characterized in that, The housing (100) is provided with a second cooling channel for the flow of cooling medium.

13. An electrical appliance, characterized in that, Includes the battery device (20) as described in any one of claims 1-12.

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