Battery device and electric device

Abstract

The invention discloses a battery device and a power utilization device, and relates to the field of batteries, and the battery device comprises a plurality of layers of battery packs which are sequentially arranged along a first direction; a mounting cavity is defined by the box body, the box body is provided with a mounting side wall, the mounting side wall is located on one side of the mounting cavity in the second direction, and an assembly space is formed by the mounting side wall; the plurality of heat exchange parts are arranged in the mounting cavity, and each heat exchange part exchanges heat with at least one battery pack; the communicating mechanism is fixed to the mounting side wall and communicates with the multiple heat exchange parts, and at least part of the communicating mechanism is assembled in the assembling space. Therefore, the communication mechanism is fixed on the mounting side wall, so that the number of the single batteries in the mounting cavity can be increased, the energy density of the battery device is favorably improved, and the space utilization rate of the mounting cavity in the battery device is also favorably improved; the space occupied by the communication mechanism in the mounting cavity is reduced, and the interference risk of the communication mechanism and the battery pack is reduced.

Description

Technical Field

[0001] This application relates to the field of batteries, and particularly to a battery device and an electrical device having the battery device. Background Art

[0002] In the related art, an existing battery device includes a box body and a plurality of battery cells. The box body defines an installation cavity, and the plurality of battery cells are installed in the installation cavity. The plurality of battery cells form a multi-layer battery pack, and the multi-layer battery pack is arranged in sequence along the height direction of the box body. A heat exchange part is arranged in the installation cavity, and the heat exchange part exchanges heat with the battery pack. A communication mechanism communicated with the heat exchange part is arranged at the middle position of the top wall of the box body, so that a heat exchange medium flows into and out of the heat exchange part. Since the communication mechanism is arranged at the middle position of the top wall of the box body, the communication mechanism occupies the middle position layout space in the installation cavity for installing the topmost layer of the battery pack, resulting in a small number of battery cells arranged in the topmost layer of the battery pack, thereby affecting the energy density of the battery device. Summary of the Invention

[0003] This application aims to at least solve one of the technical problems existing in the prior art. For this purpose, an object of this application is to provide a battery device, which is beneficial to improving the energy density of the battery device and also beneficial to improving the space utilization rate of the installation cavity in the battery device.

[0004] This application further provides an electrical device.

[0005] In a first aspect, an embodiment of this application provides a battery device, including: A multi-layer battery pack, each layer of the battery pack includes a plurality of battery cells arranged on a first plane, and the multi-layer battery pack is arranged in sequence along a first direction, and the first direction intersects with the first plane; A box body, the box body defines an installation cavity for installing the multi-layer battery pack, the box body has an installation side wall, along a second direction, the installation side wall is located on one side of the installation cavity, and the installation side wall forms an assembly space opening towards the installation cavity, and the first direction intersects with the second direction; A plurality of heat exchange parts, the plurality of heat exchange parts are arranged in the installation cavity and arranged in sequence along the first direction, and each heat exchange part exchanges heat with at least one battery pack; A communication mechanism, the communication mechanism is fixed to the installation side wall, the communication mechanism is communicated with the plurality of heat exchange parts, so that a heat exchange medium flows into the plurality of heat exchange parts through the communication mechanism and the heat exchange medium in the plurality of heat exchange parts flows out through the communication mechanism, and at least a part of the communication mechanism is assembled in the assembly space.

[0006] In the above technical solution, by fixing the connecting mechanism to the mounting side wall, compared with the prior art, the number of battery cells in the mounting cavity can be increased, which is beneficial to improving the energy density of the battery device and also beneficial to improving the space utilization rate of the mounting cavity in the battery device. Moreover, at least part of the connecting mechanism is assembled in the assembly space, which is beneficial to reducing the space occupied by the connecting mechanism in the mounting cavity and reducing the risk of interference between the connecting mechanism and the battery pack.

[0007] In some embodiments, the box body includes a box body, a box cover and an installation side panel, which together define an installation cavity. Along a first direction, the box cover and the installation side panel are located on the same side of the box body, and the box body has a first side wall opposite to the installation side panel along the first direction. The first side wall and the installation side panel are connected to form an installation side wall, and the first side wall defines an assembly space. Part of the connecting mechanism is provided on the installation side panel.

[0008] In the above technical solution, by arranging the box cover and the mounting side plate on the same side of the box body, it is convenient for the box body, the box cover and the mounting side plate to cooperate and assemble to define the mounting cavity, so that the relative positions of the box body, the box cover and the mounting side plate are arranged reasonably. In addition, by arranging part of the connecting mechanism on the mounting side plate, it is more conducive to reducing the space occupied by the connecting mechanism in the mounting cavity, so that more battery cells can be arranged in the mounting cavity, which is more conducive to improving the energy density of the battery device, and can also further reduce the risk of interference between the connecting mechanism and the battery pack, so as to facilitate the arrangement of the connecting mechanism.

[0009] In some embodiments, part of the communication mechanism is located on a side of the mounting side plate facing away from the mounting cavity.

[0010] In the above technical solution, by arranging part of the connecting mechanism on the side of the mounting side plate away from the mounting cavity, part of the connecting mechanism is located outside the mounting cavity, which further reduces the space occupied by the connecting mechanism in the mounting cavity, which is beneficial to increase the space for arranging battery cells in the mounting cavity, so that more battery cells can be installed in the mounting cavity, which is more beneficial to improving the energy density of the battery device and also more beneficial to improving the space utilization rate of the mounting cavity in the battery device, so that the connecting mechanism is reasonably arranged.

[0011] In some embodiments, the connecting mechanism includes: multiple connecting joints, the multiple connecting joints are arranged on the side of the installation side plate away from the installation cavity, some of the multiple connecting joints are configured as medium inlet joints, and another part of the multiple connecting joints are configured as medium outlet joints, each medium inlet joint is connected to multiple heat exchange parts to allow the heat exchange medium to flow into the multiple heat exchange parts, and each medium outlet joint is connected to multiple heat exchange parts to allow the heat exchange medium in the multiple heat exchange parts to flow out.

[0012] In the above technical solution, by providing a plurality of connecting joints, the effect of allowing the heat exchange medium to flow into and out of the heat exchange part is achieved. This enables the heat exchange medium to continuously carry away the heat of the battery device. Moreover, it is conducive to simplifying the structure of the connecting mechanism, facilitating the production and manufacturing of the battery device, reducing the assembly difficulty of the battery device, and also reducing the manufacturing cost of the battery device. Additionally, by arranging the plurality of connecting joints on the side of the mounting side plate facing away from the mounting cavity, the effect of arranging part of the structure of the connecting mechanism on the side of the mounting side plate facing away from the mounting cavity is realized.

[0013] In some embodiments, the plurality of connecting joints are arranged in sequence along a third direction, and the first direction intersects both the second direction and the third direction.

[0014] In the above technical solution, by arranging the plurality of connecting joints in sequence along the third direction, the plurality of connecting joints can be reasonably arranged, effectively utilizing the space of the battery device along the third direction. Compared with arranging the plurality of connecting joints in sequence along the second direction, the size of the battery device along the second direction can be effectively reduced, facilitating the installation of the battery device on the electrical device. Compared with arranging the plurality of connecting joints in sequence along the first direction, the risk of interference between the plurality of connecting pipes is reduced, facilitating the arrangement of the connecting pipes, reducing the assembly difficulty of the battery device, and being conducive to improving the assembly efficiency of the battery device.

[0015] In some embodiments, each connecting joint has a first interface. The first interface through which the medium flows into the joint is the medium inlet, and the first interface through which the medium flows out of the joint is the medium outlet. The orientations of the medium inlet and the medium outlet are the same.

[0016] In the above technical solution, due to the same orientations of the medium inlet and the medium outlet, during the pipeline connection operation, the construction personnel do not need to repeatedly adjust the pipeline orientation, can quickly and accurately complete the pipeline connection, reducing the pipeline connection time, improving the assembly efficiency of the battery device, and at the same time reducing the risk of pipeline leakage caused by complex pipeline connections, laying a solid foundation for the efficient and stable operation of the entire thermal management system of the battery device.

[0017] In some embodiments, the medium inlet and the medium outlet are arranged along the third direction.

[0018] In the above technical solution, by arranging the medium inlet and the medium outlet along the third direction, the medium inlet and the medium outlet are arranged on the same side of the battery device along the third direction. During the pipeline connection operation, the construction personnel do not need to repeatedly adjust the pipeline orientation, can more quickly and accurately complete the pipeline connection, is conducive to further reducing the pipeline connection time, is conducive to further improving the assembly efficiency of the battery device, and is conducive to further reducing the risk of pipeline leakage caused by complex pipeline connections.

[0019] In some embodiments, the mounting side panel includes: a first plate body and a second plate body, along the first direction, the first plate body is located on the side of the second plate body away from the box body, the first plate body and the second plate body are bent and connected to form an installation space on the side of the first plate body away from the mounting cavity, and at least a portion of each connecting joint is located in the installation space.

[0020] In the above technical solution, the first plate body and the second plate body are bent and connected to form an installation space on the side of the first plate body away from the installation cavity, so that the installation side plate can be recessed into the installation cavity, and at least a portion of each connecting joint is located in the installation space, which is beneficial to further reduce the size of the battery device along the second direction, and can make the structure of the battery device more compact, thereby helping to reduce the volume of the battery device.

[0021] In some embodiments, each connecting joint has a second interface, the second interface is connected to the first interface of the corresponding connecting joint, and the second interface is used to communicate with the corresponding heat exchange part.

[0022] In the above technical solution, a second interface is provided through the connecting joint, so that the connecting joint and the corresponding heat exchange part can be connected, and the first interface and the second interface of the medium inflow joint are connected, so that the heat exchange medium can flow into the corresponding heat exchange part along the first interface and the second interface, and the first interface and the second interface of the medium outflow joint are connected, so that the heat exchange medium in the heat exchange part can flow out through the second interface and the first interface.

[0023] In some embodiments, each connecting joint has a plurality of second interfaces, and the plurality of second interfaces are connected to the plurality of heat exchange parts in a one-to-one correspondence.

[0024] In the above technical solution, the multiple second interfaces of each connecting joint are respectively connected with the multiple heat exchange parts one by one, which is beneficial for the heat exchange medium to flow into the multiple heat exchange parts evenly through the medium inflow joint, which is beneficial for improving the heat exchange consistency of the heat exchange parts, which is beneficial for reducing the temperature difference of the multi-layer battery pack, which is beneficial for improving the reliability of the battery device, and which is also beneficial for making the heat exchange medium in the multiple heat exchange parts flow into the medium outflow joint synchronously.

[0025] In some embodiments, the mounting side panel is formed with multiple avoidance structures, and the multiple avoidance structures correspond one-to-one to the multiple connecting joints. Each avoidance structure includes an avoidance hole connected to the mounting cavity, and the multiple second interfaces of the connecting joint correspond to the avoidance holes of the corresponding avoidance structures.

[0026] In the above technical solution, a plurality of avoidance structures are formed by installing side plates. Each avoidance structure includes an avoidance hole communicating with the installation cavity. The plurality of second interfaces of the communication joint correspond to the avoidance holes of the corresponding avoidance structures, facilitating the communication pipe to communicate with the second interface of the corresponding communication joint and the corresponding heat exchange part, reducing the assembly difficulty of the communication pipe, thereby reducing the assembly difficulty of the battery device, and further facilitating the improvement of the assembly efficiency of the battery device and the production efficiency of the battery device.

[0027] In some embodiments, each avoidance structure includes a plurality of avoidance holes, and the plurality of second interfaces of the communication joint correspond one-to-one to the plurality of avoidance holes of the corresponding avoidance structure.

[0028] In the above technical solution, by setting the plurality of second interfaces of the communication joint to correspond one-to-one to the plurality of avoidance holes of the corresponding avoidance structure, the risk of interference of the plurality of communication pipes connecting the communication joint and the plurality of heat exchange parts is reduced, and it is more convenient for the communication pipe to communicate with the second interface of the corresponding communication joint and the corresponding heat exchange part, further reducing the assembly difficulty of the communication pipe, thereby further reducing the assembly difficulty of the battery device, and further facilitating the improvement of the assembly efficiency of the battery device and the production efficiency of the battery device.

[0029] In some embodiments, each avoidance structure includes two avoidance holes, which are respectively a first avoidance hole and a second avoidance hole. The first plate body forms a first avoidance hole, and the second plate body forms a second avoidance hole; Each communication joint has two second interfaces. One second interface is formed on each of the side of the communication joint facing the first plate body and the side facing the second plate body, and the two second interfaces respectively correspond to the corresponding first avoidance hole and second avoidance hole.

[0030] In the above technical solution, since the first plate body forms a first avoidance hole, the second plate body forms a second avoidance hole, and one second interface is formed on each of the side of the communication joint facing the first plate body and the side facing the second plate body, the plurality of second interfaces of the communication joint can be arranged on different sides of the communication joint, facilitating the two second interfaces of each communication joint to respectively correspond to the corresponding first avoidance hole and second avoidance hole, so that the arrangement positions of the second interface of the communication joint and the avoidance hole are reasonable, and facilitating the communication pipe to communicate with the second interface of the corresponding communication joint and the corresponding heat exchange part.

[0031] In some embodiments, a first connecting column is formed on the side of each communication joint facing the second plate body. The first connecting column forms a second interface, and the first connecting column passes through the second avoidance hole.

[0032] In the above technical solution, the first connecting column of the connecting joint passes through the corresponding second avoidance hole, and the first connecting column can extend into the installation cavity, facilitating the connection of the connecting pipe to the first connecting column and the corresponding heat exchange part, further improving the connection efficiency of the connecting pipe. Moreover, the first connecting column can abut against and be limited by the inner side wall of the second avoidance hole, and the connecting joint can be reliably fixed to the installation side plate.

[0033] In some embodiments, the connecting mechanism further includes: a plurality of connecting structures, at least part of the plurality of connecting structures is arranged in the assembly space, and the plurality of connecting structures correspond to the plurality of connecting joints one by one, and the connecting structures connect the corresponding connecting joints and the plurality of heat exchange parts.

[0034] In the above technical solution, by providing a plurality of connecting structures, the connecting structures can connect the corresponding connecting joints and the plurality of heat exchange parts, achieving the effect of connecting the corresponding connecting joints and the plurality of heat exchange parts. Moreover, the plurality of connecting structures can be produced using the same mold, which is beneficial to reducing the manufacturing cost of the battery device. In addition, at least part of the plurality of connecting structures is arranged in the assembly space, reducing the occupation of the space in the installation cavity by the plurality of connecting structures.

[0035] In some embodiments, the plurality of heat exchange parts include: a first heat exchange part and a second heat exchange part. Along the first direction, the first heat exchange part is located between the box cover and the second heat exchange part. The connecting structure includes a first connecting pipe and a second connecting pipe. The first connecting pipe connects the first heat exchange part and the second interface on the side of the corresponding connecting joint facing the first plate body, and the second connecting pipe connects the second heat exchange part and the second interface on the side of the corresponding connecting joint facing the second plate body. The second connecting pipe is arranged in the assembly space.

[0036] In the above technical solution, by providing the first heat exchange part, the second heat exchange part, the first connecting pipe and the second connecting pipe, and a second interface is formed on each of the side of the connecting joint facing the first plate body and the side facing the second plate body, the interference risk between the first connecting pipe and the second connecting pipe can be reduced, the space in the installation cavity can be fully utilized, and the overall structure of the battery device can be made more compact and reasonable. Moreover, the second connecting pipe is arranged in the assembly space, reducing the occupation of the space in the installation cavity by the second connecting pipe.

[0037] In some embodiments, the first side wall includes a side wall body, the side wall body and the installation side plate are arranged and connected along the first direction. Along the second direction, the assembly space is located between the installation cavity and the side wall body. The second connecting pipe extends along the first direction, and an avoidance groove is formed on the inner surface of the side wall body, and at least part of the second connecting pipe is located in the avoidance groove.

[0038] In the above technical solution, an avoidance groove is formed by the side wall body, and at least a part of the structure of the second connecting tube of the connecting structure can be assembled in the corresponding avoidance groove, thereby reducing the space occupied by the second connecting tube in the assembly space, so that there is more space in the installation cavity to install battery cells, which is beneficial to further improve the energy density of the battery device, and is also beneficial to further improve the space utilization rate of the installation cavity in the battery device, and can also make the overall structure of the battery device more compact.

[0039] In some embodiments, the first side wall also includes a mounting boss, and the mounting boss is formed on the inner surface of the side wall body near the mounting cavity, so that the side wall body and the mounting boss jointly define an assembly space, and the mounting boss is formed with a mounting hole, and the mounting hole passes through the mounting boss along a first direction. Along the first direction, the mounting boss and the second plate body are opposite, and the assembly space is located between the mounting boss and the second plate body, and the second heat exchange part is located on the side of the mounting boss away from the box cover, and the second heat exchange part has a second connecting column protruding toward the mounting boss, and the second connecting column is passed through the mounting hole, and the second connecting pipe is connected with the second connecting column to connect the second connecting pipe and the second heat exchange part.

[0040] In the above technical solution, a mounting boss is formed on the inner surface of the side wall body to achieve the effect of limiting the assembly space by the first side wall. The mounting boss can limit the second heat exchange part, reducing the risk of the second heat exchange part moving toward the first heat exchange part. In addition, the second connecting column is passed through the mounting hole to facilitate the connection between the second connecting pipe and the corresponding heat exchange part, thereby further improving the connection efficiency of the second connecting pipe. In addition, the second connecting column can abut against the inner side wall of the mounting hole to limit the position, so that the second heat exchange part can be reliably fixed in the mounting cavity.

[0041] In some embodiments, the connecting joint is formed with a mounting portion, the mounting portion is formed with a first mounting hole, the first connecting pipe is formed with a mounting flange, the mounting flange is formed with a second mounting hole, and the first connecting pipe is fixed to the mounting portion by a fastener that passes through the second mounting hole and is assembled to the first mounting hole.

[0042] In the above technical solution, the connecting joint is provided with a mounting portion, so that the first connecting pipe can be reliably fixed to the connecting joint, so that the first connecting pipe can be reliably connected with the corresponding second interface.

[0043] In some embodiments, there are multiple mounting portions, and the multiple mounting portions are arranged around the second interface on corresponding sides of the connecting joint.

[0044] In the above technical solution, by providing multiple mounting parts, and arranging the multiple mounting parts around the second interface on the corresponding side of the connecting joint, the first connecting pipe can be more reliably fixed to the connecting joint, so that the first connecting pipe and the corresponding second interface can be more reliably connected.

[0045] In some embodiments, the mounting side plate is clamped between the box cover and the box body, and the mounting side plate is fixed to at least one of the box body and the box cover.

[0046] In the above technical solution, by clamping the mounting side plate between the box cover and the box body, the mounting side plate, the box cover and the box body can jointly define a mounting cavity. By fixing the mounting side plate to at least one of the box body and the box cover, the mounting side plate, the box cover and the box body can be assembled into an integral body, which is beneficial to improving the structural strength of the battery device.

[0047] In some embodiments, the box cover has a second side wall, and the first side wall, the mounting side plate and the second side wall are arranged along the first direction, and the mounting side plate is clamped between the first side wall and the second side wall.

[0048] In the above technical solution, by clamping the mounting side plate between the first side wall and the second side wall, the mounting side plate can be arranged on one side of the mounting cavity along the second direction, so that the arrangement position of the mounting side plate is reasonable.

[0049] In some embodiments, the second side wall is formed with a first assembly notch, at least part of the mounting side plate is adapted to the shape of the first assembly notch, and the mounting side plate is assembled in the first assembly notch.

[0050] In the above technical solution, by forming the first assembly notch on the second side wall, the mounting side plate can be assembled in the first assembly notch, reducing the risk of interference between the box cover and the mounting side plate. And by at least part of the mounting side plate being adapted to the shape of the first assembly notch, the second side wall and the mounting side plate can be adapted, facilitating the mounting side plate to cover the first assembly notch and facilitating the mounting side plate, the box cover and the box body to jointly define the mounting cavity.

[0051] In some embodiments, the second side wall has a mounting flange, the mounting flange is arranged along the edge of the first assembly notch, the end face of the mounting side plate facing the second side wall has a mounting structure, the mounting structure is opposite to the mounting flange, and the mounting structure is fixed to the mounting flange.

[0052] In the above technical solution, by the second side wall having a mounting flange and the end face of the mounting side plate facing the second side wall having a mounting structure, it is convenient for the mounting flange and the mounting structure to be assembled in cooperation, so as to facilitate the fixed assembly of the second side wall and the mounting side plate, and further make the arrangement positions of the mounting flange and the mounting structure reasonable.

[0053] In some embodiments, the shapes of the mounting flange and the mounting structure are adapted.

[0054] In the above technical solution, by the shapes of the mounting flange and the mounting structure being adapted, it is beneficial to the reliable assembly of the mounting flange and the mounting structure, and it is also convenient for the gap sealing between the mounting flange and the mounting structure.

[0055] In some embodiments, the box body also has two third side walls, the two third side walls are spaced apart along a third direction, the first side wall is located between the two third side walls, and along the first direction, the third side wall has a protrusion protruding from the first side wall toward the box cover, and a second assembly notch is formed at the inner corner of the protrusion, part of the installation side plate is located between the two third side walls, and the installation side plate is assembled in the second assembly notch so that the third side wall limits the movement of the installation side plate along the second direction toward the installation cavity.

[0056] In the above technical solution, the third side wall has a protrusion protruding from the first side wall toward the box cover, and a second assembly notch is formed at the inner corner of the protrusion. After the mounting side panel is assembled in the second assembly notches of the two third side walls, the third side wall and the mounting side panel are abutted and limited along the second direction. The third side wall can limit the movement of the mounting side panel along the second direction toward the mounting cavity, thereby making the assembly of the mounting side panel more stable.

[0057] In some embodiments, the heat exchange parts are all configured as heat exchange plates.

[0058] In the above technical solution, by constructing the heat exchange part as a heat exchange plate, it is beneficial to increase the heat exchange area between the heat exchange part and the battery pack, and improve the heat exchange effect between the heat exchange part and the battery cell.

[0059] In some embodiments, the battery device further includes: an electrical connection mechanism, which is fixed to the mounting side plate and is located on a side of the mounting side plate away from the mounting cavity.

[0060] In the above technical solution, the electrical connection mechanism is located on the side of the mounting side plate away from the mounting cavity, which reduces the risk of the electrical connection mechanism occupying the space in the mounting cavity. This is more conducive to increasing the space for arranging battery cells in the mounting cavity, thereby allowing more battery cells to be installed in the mounting cavity. This is more conducive to improving the energy density of the battery device and also more conducive to improving the space utilization rate of the mounting cavity in the battery device, thereby making the electrical connection mechanism reasonably positioned.

[0061] In a second aspect, an embodiment of the present application further provides an electrical device, comprising the above-mentioned battery device.

[0062] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic diagram of a vehicle according to an embodiment of the present application; Figure 2Schematic diagram of a battery device according to an embodiment of the present application; Figure 3 is Figure 2 Enlarged view at position A in Figure 4 Assembly schematic diagram of a first heat exchange part, a second heat exchange part, a battery pack, and a connection mechanism according to an embodiment of the present application; Figure 5 Assembly schematic diagram of a first heat exchange part, a second heat exchange part, a mounting side plate, a connection structure, a connection joint, and a first side wall according to an embodiment of the present application; Figure 6 is Figure 5 Enlarged view at position B in Figure 7 Another angle schematic diagram of the assembly of a first heat exchange part, a second heat exchange part, a mounting side plate, a connection structure, a connection joint, and a first side wall according to an embodiment of the present application; Figure 8 is Figure 7 Enlarged view at position C in Figure 9 Assembly schematic diagram of a first heat exchange part, a second heat exchange part, a connection structure, and a connection joint according to an embodiment of the present application; Figure 10 is Figure 9 Enlarged view at position D in Figure 11 Schematic diagram of a mounting side plate according to an embodiment of the present application; Figure 12 Schematic diagram of a first side wall according to an embodiment of the present application; Figure 13 Schematic diagram of a connection joint according to an embodiment of the present application; Figure 14 Schematic diagram of a battery cell according to an embodiment of the present application; Figure 15 Schematic diagram of a box cover according to an embodiment of the present application.

[0064] Reference numerals: Battery device 100; Battery cell 10; Box body 20; Box body main body 21; First side wall 211; Side wall main body 2111; Avoidance groove 212; Mounting boss 213; Mounting hole 214; Third side wall 215; Protruding part 216; Second assembly notch 217; Box cover 22; Second side wall 221; First assembly notch 222; Mounting flange 223; First assembly hole 224; Mounting side wall 23; Assembly space 231; Install the side plate 30; the first plate body 31; the second plate body 32; the installation space 33; the installation structure 34; the second assembly hole 35; The heat exchange part 40; the first heat exchange part 41; the second heat exchange part 42; the second connecting column 43; the heat exchange part inlet 44; the heat exchange part outlet 45; the through hole 46; the third assembly hole 47; The communication mechanism 50; The communication joint 51; the first interface 511; the second interface 512; the first connecting column 513; the installation part 514; the first installation hole 515; The medium inflow joint 52; the medium outflow joint 53; The plug cover 60; The avoidance hole 71; the first avoidance hole 711; the second avoidance hole 712; The communication structure 80; the first communication pipe 81; the installation flange 811; the second communication pipe 82; The electrical connection mechanism 90; the battery pack 91; The vehicle 200; the controller 201; the motor 202. Specific embodiments

[0065] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0066] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0067] Referring to "embodiments" in this application means that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0068] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "linked", and "attached" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0069] The term "and / or" in the present application is merely an association relationship describing associated objects, indicating that there can be three relationships. For example, E and / or F can represent: E exists alone, E and F exist simultaneously, and F exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the associated objects before and after.

[0070] In the embodiments of the present application, the same reference numerals represent the same components. And for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, etc. of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width, etc. of the integrated device, are only illustrative descriptions and should not constitute any limitation to the present application.

[0071] If there is no special description, all embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions.

[0072] If there is no special description, all technical features and optional technical features of the present application can be combined with each other to form new technical solutions.

[0073] The "plurality" mentioned in the present application refers to two or more (including two).

[0074] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging so as to continue to be used.

[0075] The battery cell can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application do not limit this.

[0076] The battery cell can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc., and the embodiments of the present application do not limit this either. Generally, the battery cell is divided into three types according to the packaging method: cylindrical battery cell, square battery cell, and soft-pack battery cell, and the embodiments of the present application do not limit this either.

[0077] The battery device mentioned in the embodiments of the present application may include one or more battery packs for providing voltage and capacity. Each battery pack may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel or in a hybrid connection through a busbar component.

[0078] In some embodiments, a battery pack is generally formed by arranging a plurality of battery cells.

[0079] In some embodiments, the battery device may be a battery pack, which includes a box body and one or more battery packs, and the battery packs are accommodated in the box body.

[0080] As an example, the battery pack may be accommodated in the box body by directly fixing a plurality of battery cells to the box body.

[0081] As an example, the box body may include a box body main body and a box cover. The box body main body and the box cover are buckled, and the battery pack is installed in the box body.

[0082] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles and spaceships, etc.

[0083] The battery cell includes a housing, an electrode assembly and an electrolyte, and the housing is used to accommodate the electrode assembly and the electrolyte. The electrode assembly is composed of an anode current collector, a cathode current collector and a separator. The battery cell mainly works by the movement of metal ions between the anode current collector and the cathode current collector. The anode current collector includes an anode current collector body and an anode active material layer, and the anode active material layer is coated on the surface of the anode current collector body. The anode current collector body without the coated anode active material layer protrudes from the anode current collector body with the coated anode active material layer, and the anode current collector body without the coated anode active material layer serves as the anode tab. Taking a lithium-ion battery as an example, the material of the anode current collector can be aluminum, and the anode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, etc. The cathode current collector includes a cathode current collector body and a cathode active material layer, and the cathode active material layer is coated on the surface of the cathode current collector body. The cathode current collector body without the coated cathode active material layer protrudes from the cathode current collector body with the coated cathode active material layer, and the cathode current collector body without the coated cathode active material layer serves as the cathode tab. The material of the cathode current collector can be copper, and the cathode active material can be carbon or silicon, etc. In order to ensure that a large current can pass through without fusing, the number of anode tabs is multiple and they are stacked together, and the number of cathode tabs is multiple and they are stacked together.

[0084] The material of the separator can be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be a wound structure or a stacked structure, and the embodiments of the present application are not limited thereto.

[0085] In recent years, battery devices have developed rapidly. Battery devices can be installed in vehicles, laptop computers, battery-powered vehicles, electric toys, etc. This application takes the installation of a battery device on a new energy vehicle as an example for illustration. In recent years, new energy vehicles have achieved leapfrog development. In the field of electric vehicles, the battery device, as the power source of the electric vehicle, plays an irreplaceable and important role. As a core component of new energy vehicles, the battery device has high requirements for reliability.

[0086] In the prior art, multiple battery cells are arranged in the box body of the battery device. The box body defines an installation cavity, and the multiple battery cells are installed in the installation cavity. The multiple battery cells form a multi-layer battery pack, and the multi-layer battery pack is arranged in sequence along the height direction of the box body. A heat exchange part is arranged in the installation cavity, and the heat exchange part exchanges heat with the battery pack. A communication mechanism communicated with the heat exchange part is arranged at the middle position of the top wall of the box body, so that the heat exchange medium flows into and out of the heat exchange part. Since the communication mechanism is arranged at the middle position of the top wall of the box body, the communication mechanism occupies the middle position layout space in the installation cavity for installing the uppermost layer of the battery pack, resulting in a small number of battery cells arranged in the uppermost layer of the battery pack, thereby affecting the energy density of the battery device.

[0087] Based on the above considerations, in order to solve the energy density problem of the battery device, after in-depth research, a battery device is designed, including: a multi-layer battery pack, each layer of the battery pack includes a plurality of battery cells arranged on a first plane, and the multi-layer battery packs are arranged in sequence along a first direction, and the first direction intersects with the first plane; a box body, the box body defines an installation cavity for installing the multi-layer battery pack, the box body has an installation side wall, along a second direction, the installation side wall is located on one side of the installation cavity, and the installation side wall forms an assembly space opening towards the installation cavity, and the first direction intersects with the second direction; a plurality of heat exchange parts, the plurality of heat exchange parts are arranged in the installation cavity and are arranged in sequence along the first direction, and each heat exchange part exchanges heat with at least one battery pack; a communication mechanism, the communication mechanism is fixed on the installation side wall, the communication mechanism is communicated with the plurality of heat exchange parts, so that the heat exchange medium flows into the plurality of heat exchange parts through the communication mechanism and the heat exchange medium in the plurality of heat exchange parts flows out through the communication mechanism, and at least part of the communication mechanism is assembled in the assembly space. By fixing the communication mechanism on the installation side wall, compared with the prior art, the number of battery cells in the installation cavity can be increased, which is beneficial to improving the energy density of the battery device and also beneficial to improving the space utilization rate of the installation cavity in the battery device. Moreover, at least part of the communication mechanism is assembled in the assembly space, which is beneficial to reducing the space occupied by the communication mechanism in the installation cavity and reducing the interference risk between the communication mechanism and the battery pack.

[0088] Please refer to Figure 1 , Figure 1Schematic diagram of the structure of vehicle 200 provided by some embodiments of the present application. Vehicle 200 can be a fuel vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. The battery device 100 is installed on the chassis of vehicle 200. The battery device 100 can be used to supply power to vehicle 200. For example, the battery device 100 can be used as the operating power source of vehicle 200. Vehicle 200 may further include a controller 201 and a motor 202. The controller 201 is used to control the battery device 100 to supply power to the motor 202. For example, it is used for the working power requirements during the start-up, navigation, and driving of vehicle 200.

[0089] In some embodiments of the present application, the battery device 100 can not only be used as the operating power source of vehicle 200, but also as the driving power source of vehicle 200, replacing or partially replacing fuel or natural gas to provide driving power for vehicle 200.

[0090] The following refers to Figures 2 - 15 Describe the battery device 100 according to the embodiments of the present application, taking the battery device 100 installed on the chassis of vehicle 200 as an example for illustration.

[0091] As Figures 2 - 15 shown, the battery device 100 according to the embodiments of the present application includes: A multi-layer battery pack 91, each layer of the battery pack 91 includes a plurality of battery cells 10 arranged on a first plane, and the multi-layer battery packs 91 are arranged in sequence along a first direction, and the first direction intersects with the first plane; a box body 20, the box body 20 defines an installation cavity for installing the multi-layer battery pack 91, the box body 20 has an installation side wall 23, along a second direction, the installation side wall 23 is located on one side of the installation cavity, and the installation side wall 23 forms an assembly space 231 opening towards the installation cavity, and the first direction and the second direction intersect; a plurality of heat exchange parts 40, the plurality of heat exchange parts 40 are arranged in the installation cavity and arranged in sequence along the first direction, and each heat exchange part 40 exchanges heat with at least one battery pack 91; A communication mechanism 50, the communication mechanism 50 is fixed to the installation side wall 23, the communication mechanism 50 is communicated with a plurality of heat exchange parts 40, so that the heat exchange medium flows into the plurality of heat exchange parts 40 through the communication mechanism 50 and the heat exchange medium in the plurality of heat exchange parts 40 flows out through the communication mechanism 50, and at least part of the communication mechanism 50 is assembled in the assembly space 231.

[0092] Among them, the battery device 100 includes a box body 20, a communication mechanism 50, a multi-layer battery pack 91 and a plurality of heat exchange parts 40. The battery pack 91 can be formed in two layers, three layers, four layers, etc. Each layer of the battery pack 91 can include a plurality of battery cells 10, and the plurality of battery cells 10 in each layer of the battery pack 91 are arranged on a first plane. In the present application, the first plane is taken as a horizontal plane for illustration. As an example, as Figure 4As shown, a plurality of battery cells 10 of at least one layer of battery pack 91 can form a plurality of battery modules, and each battery module includes a plurality of battery cells 10. As an example, the plurality of battery cells 10 of at least one layer of battery pack 91 can be arranged in sequence along a direction parallel to the first plane. The multiple layers of battery packs 91 are arranged in sequence along the first direction, the first direction intersects with the first plane, and the included angle between the first direction and the first plane can be one of an acute angle, an obtuse angle, and a right angle. In this application, the example where the included angle between the first direction and the first plane is a right angle is used for illustration, that is, the example where the first direction is perpendicular to the first plane is used for illustration. When the battery device 100 is placed in the Figure 2 direction shown, the first direction is the Figure 2 Z direction in, and it can also be understood that the first direction is the height direction of the battery device 100. In other words, the first direction is the Figure 2 up and down direction in. In this application, the example where the first direction is the height direction of the battery device 100 is used for illustration.

[0093] The box body 20 defines an installation cavity for installing multiple layers of battery packs 91. The box body 20 has an installation side wall 23. Along the second direction, the installation side wall 23 is located on one side of the installation cavity. The installation side wall 23 forms an assembly space 231 that opens towards the installation cavity. Along the second direction, the assembly space 231 is located on the side of the installation side wall 23 facing the installation cavity. In other words, the assembly space 231 is located between the installation side wall 23 and the installation cavity. The assembly space 231 and the installation cavity are adjacent and communicate with each other. The first direction and the second direction intersect, and the included angle between the first direction and the second direction can be one of an acute angle, an obtuse angle, and a right angle. In this application, the example where the included angle between the first direction and the second direction is a right angle is used for illustration, that is, the example where the first direction is perpendicular to the second direction is used for illustration. As an example, the second direction and the first plane can be one of an acute angle, an obtuse angle, and a right angle. As another example, the second direction is parallel to the first plane. In this application, the example where the second direction is parallel to the first plane is used for illustration.

[0094] The heat exchange part 40 can be set to two, three, four, etc. The number of the heat exchange parts 40 can be reasonably selected according to the actual situation. A plurality of heat exchange parts 40 are arranged in the installation cavity. The heat exchange part 40 can be a heat exchange plate, and a plurality of heat exchange parts 40 are arranged at intervals in sequence along the first direction. A layer of battery packs 91 can be arranged between any two adjacent heat exchange parts 40. Along the first direction, a battery pack 91 can be arranged above the uppermost heat exchange part 40, and a battery pack 91 can also be arranged below the lowermost heat exchange part 40. The heat exchange part 40 is used for heat exchange cooperation with the adjacent battery packs 91, and a plurality of heat exchange parts 40 respectively perform heat exchange with the corresponding battery packs 91. It should be noted that the heat exchange part 40 between two adjacent layers of battery packs 91 can perform heat exchange with at least one adjacent battery pack 91. In this application, an example is given where the number of the heat exchange parts 40 is the same as the number of the battery packs 91, and a plurality of heat exchange parts 40 and a plurality of layers of battery packs 91 perform one-to-one heat exchange. Each layer of battery pack 91 is configured with a heat exchange part 40 for heat exchange, which is beneficial to improving the heat exchange efficiency of the battery cell 10.

[0095] The communication mechanism 50 is fixed to the installation side wall 23. The communication mechanism 50 can be welded to the installation side wall 23, and the communication mechanism 50 can also be fixed to the installation side wall 23 by bolts, and the communication mechanism 50 can also be clamped to the installation side wall 23. The communication mechanism 50 is communicated with a plurality of heat exchange parts 40. As an example, the communication mechanism 50 can include a medium inlet pipe and a medium outlet pipe. The medium inlet pipe is communicated with a plurality of heat exchange parts 40, so that the heat exchange medium flows into a plurality of heat exchange parts 40 through the medium inlet pipe. The medium outlet pipe is communicated with a plurality of heat exchange parts 40, so that the heat exchange medium in a plurality of heat exchange parts 40 flows out of the heat exchange part 40 through the medium outlet pipe. It should be noted that a heat exchange flow channel can be arranged in the heat exchange part 40. After the heat exchange medium flows into the heat exchange part 40 through the medium inlet pipe, the heat exchange medium in the heat exchange part 40 flows towards the medium outlet pipe along the heat exchange flow channel. During the flow of the heat exchange medium, it exchanges heat with the corresponding battery cell 10, thereby taking away the heat of the battery cell 10 and achieving the effect of adjusting the temperature of the battery cell 10, which is beneficial to the battery cell 10 working at a suitable temperature and thus beneficial to improving the reliability of the battery cell 10.

[0096] Along the second direction, the installation side wall 23 is located on one side of the installation cavity. The installation side wall 23 can be the side wall of the installation cavity. The first direction and the second direction can be perpendicular, such as Figure 2 shown, the second direction is Figure 2in the X direction. By fixing the communication mechanism 50 to the installation side wall 23, the communication mechanism 50 is arranged on one side of the installation cavity. Compared with the communication mechanism 50 being arranged on the top wall of the box body 20, along the first direction, the communication mechanism 50 does not occupy the layout space of the uppermost battery pack 91, and the number of battery cells 10 arranged in the uppermost battery pack 91 can be increased, which is beneficial to improving the energy density of the battery device 100 and also beneficial to improving the space utilization rate of the installation cavity in the battery device 100. Moreover, at least part of the structure of the communication mechanism 50 is assembled in the assembly space 231. It can also be understood that part of the structure of the communication mechanism 50 is assembled in the assembly space 231, or the whole structure of the communication mechanism 50 is assembled in the assembly space 231. In this application, the case where part of the structure of the communication mechanism 50 is assembled in the assembly space 231 is taken as an example for illustration. By assembling at least part of the structure of the communication mechanism 50 in the assembly space 231, it is beneficial to reduce the space occupied by the communication mechanism 50 in the installation cavity, so that more battery cells 10 can be arranged in the installation cavity, which is more beneficial to improving the energy density of the battery device 100, and can also reduce the interference risk between the communication mechanism 50 and the battery pack 91, thus facilitating the arrangement of the communication mechanism 50.

[0097] In the above technical solution, by the installation side wall 23 being located on one side of the installation cavity, the communication mechanism 50 is fixed to the installation side wall 23, so that the communication mechanism 50 is arranged on one side of the installation cavity. Compared with the communication mechanism 50 being arranged on the top wall of the box body 20, along the first direction, the communication mechanism 50 does not occupy the layout space in the middle position of the installation cavity for installing the uppermost battery pack 91, and the number of battery cells 10 arranged in the uppermost battery pack 91 can be increased, which is beneficial to improving the energy density of the battery device 100 and also beneficial to improving the space utilization rate of the installation cavity in the battery device 100. Moreover, by assembling at least part of the structure of the communication mechanism 50 in the assembly space 231, it is beneficial to reduce the space occupied by the communication mechanism 50 in the installation cavity, so that more battery cells 10 can be arranged in the installation cavity, which is more beneficial to improving the energy density of the battery device 100, and can also reduce the interference risk between the communication mechanism 50 and the battery pack 91, thus facilitating the arrangement of the communication mechanism 50.

[0098] According to some embodiments of the present application, as Figure 2 , Figure 3 and Figure 6 shown, the box body 20 includes a box body main body 21, a box cover 22 and an installation side plate 30. The box body main body 21, the box cover 22 and the installation side plate 30 jointly define an installation cavity. Along the first direction, the box cover 22 and the installation side plate 30 are located on the same side of the box body main body 21. The box body main body 21 has a first side wall 211 opposite to the installation side plate 30 along the first direction. The first side wall 211 and the installation side plate 30 are connected to form the installation side wall 23. The first side wall 211 defines an assembly space 231, and part of the communication mechanism 50 is arranged on the installation side plate 30.

[0099] Among them, the box body 20 includes a box body main body 21, a mounting side plate 30, and a box cover 22. Along the first direction, the box cover 22 and the mounting side plate 30 can be located on the same side of the box body main body 21. As Figure 2 shown, along the first direction, the box cover 22 and the mounting side plate 30 can be located on the upper side of the box body main body 21. Or along the first direction, the box cover 22 and the mounting side plate 30 can be located on the lower side of the box body main body 21. As Figure 2 shown, this application takes the box cover 22 and the mounting side plate 30 being located on the upper side of the box body main body 21 as an example for illustration.

[0100] The box body main body 21 and the box cover 22 can be opposite to each other along the first direction. The box cover 22 is fixed to the box body main body 21, and the box cover 22 is detachably connected to the box body main body 21. The box cover 22 can be detachably connected to the box body main body 21 by bolts, or the box cover 22 can be snap-connected to the box body main body 21 to make the box cover 22 detachably connected to the box body main body 21. The box body main body 21 has a first side wall 211 opposite to the mounting side plate 30 along the first direction. The lower end of the first side wall 211 contacts the upper end of the mounting side plate 30. The first side wall 211 and the mounting side plate 30 form a mounting side wall 23. The first side wall 211 and the mounting side plate 30 are connected. The first side wall 211 and the mounting side plate 30 can be connected by welding, or the first side wall 211 and the mounting side plate 30 can be connected by bolts, or the first side wall 211 and the mounting side plate 30 can be connected by snap connection. The first side wall 211 defines an assembly space 231, that is to say, the assembly space 231 is defined by the first side wall 211. The first side wall 211 forms an assembly space 231. A part of the communication mechanism 50 is arranged in the assembly space 231, and a part of the communication mechanism 50 is arranged on the mounting side plate 30.

[0101] The mounting side plate 30 can be clamped between the first side wall 211 of the box body main body 21 and the box cover 22, so that the box body main body 21, the box cover 22, and the mounting side plate 30 jointly define an installation cavity, and the multi-layer battery pack 91 is installed in the installation cavity. As an example, the mounting side plate 30 can be clamped between the first side wall 211 of the box body main body 21 and the second side wall 221 of the box cover 22, so that the box body main body 21, the box cover 22, and the mounting side plate 30 jointly define an installation cavity.

[0102] In the above technical solution, by arranging the box cover 22 and the mounting side plate 30 on the same side of the box body 21, it is convenient for the box body 21, the box cover 22 and the mounting side plate 30 to cooperate and assemble to define the mounting cavity, so that the relative positions of the box body 21, the box cover 22 and the mounting side plate 30 are arranged reasonably. In addition, by arranging part of the connecting mechanism 50 on the mounting side plate 30, it is more conducive to reducing the space occupied by the connecting mechanism 50 in the mounting cavity, so that more battery cells 10 can be arranged in the mounting cavity, which is more conducive to improving the energy density of the battery device 100, and can also further reduce the risk of interference between the connecting mechanism 50 and the battery pack 91, so as to facilitate the arrangement of the connecting mechanism 50.

[0103] According to some embodiments of the present application, each layer of battery packs 91 includes a plurality of battery cells 10 , and the plurality of battery cells 10 of each layer of battery packs 91 are arranged along the second direction.

[0104] Each layer of battery pack 91 may include a plurality of battery cells 10, and the plurality of battery cells 10 of each layer of battery pack 91 may be arranged along the second direction. As an example, the plurality of battery cells 10 of each layer of battery pack 91 form a plurality of battery modules, and any two adjacent battery modules in each layer of battery pack 91 may be spaced apart.

[0105] In the above technical solution, each layer of battery pack 91 includes multiple battery cells 10, and the multiple battery cells 10 of each layer of battery pack 91 are arranged along the second direction, so that the multi-layer battery pack 91 can be installed in the installation cavity in an orderly manner, which facilitates the connection of multiple battery cells 10.

[0106] According to some embodiments of the present application, Figure 2 and Figure 3 As shown, part of the communication mechanism 50 is located on a side of the mounting side plate 30 facing away from the mounting cavity.

[0107] Among them, along the second direction, the side of the mounting side plate 30 facing away from the mounting cavity is the outer side of the mounting side plate 30, and the inner side of the mounting side plate 30 is the side of the mounting side plate 30 facing the mounting cavity. Part of the structure of the connecting mechanism 50 is arranged on the outer side of the mounting side plate 30, and part of the structure of the connecting mechanism 50 is located outside the mounting cavity. The part of the structure of the connecting mechanism 50 arranged outside the mounting cavity does not occupy the space in the mounting cavity, which is beneficial to increase the space for arranging the battery cells 10 in the mounting cavity, so that more battery cells 10 can be installed in the mounting cavity, which is more beneficial to improve the energy density of the battery device 100, and is also more beneficial to improve the space utilization rate of the mounting cavity in the battery device 100, so that the connection mechanism 50 is reasonably arranged.

[0108] In the above technical solution, by arranging a part of the structure of the connection mechanism 50 on the side of the mounting side plate 30 facing away from the mounting cavity, a part of the structure of the connection mechanism 50 is located outside the mounting cavity, further reducing the space occupied by the connection mechanism 50 in the mounting cavity, which is beneficial to increasing the space for arranging the battery cells 10 in the mounting cavity, so that more battery cells 10 can be installed in the mounting cavity, which is more beneficial to improving the energy density of the battery device 100 and also more beneficial to improving the space utilization rate of the mounting cavity in the battery device 100, thus making the setting position of the connection mechanism 50 reasonable.

[0109] According to some embodiments of the present application, as Figures 2 - 5 shown, the connection mechanism 50 includes: a plurality of connection joints 51, the plurality of connection joints 51 are arranged on the side of the mounting side plate 30 facing away from the mounting cavity, a part of the plurality of connection joints 51 is configured as a medium inlet joint 52, and another part of the plurality of connection joints 51 is configured as a medium outlet joint 53. Each medium inlet joint 52 is connected to all the plurality of heat exchange parts 40 to allow the heat exchange medium to flow into the plurality of heat exchange parts 40, and each medium outlet joint 53 is connected to all the plurality of heat exchange parts 40 to allow the heat exchange medium in the plurality of heat exchange parts 40 to flow out.

[0110] Among them, the connection mechanism 50 includes: a plurality of connection joints 51. The number of connection joints 51 can be two, three, four, five, etc. A part of the plurality of connection joints 51 is configured as a medium inlet joint 52, and another part of the plurality of connection joints 51 is configured as a medium outlet joint 53. Each medium inlet joint 52 is connected to all the plurality of heat exchange parts 40, so that the heat exchange medium flows into the plurality of heat exchange parts 40 through the medium inlet joint 52. Each medium outlet joint 53 is connected to all the plurality of heat exchange parts 40, so that the heat exchange medium in the plurality of heat exchange parts 40 flows out of the heat exchange part 40 through the medium outlet joint 53. Each heat exchange part 40 is connected to at least one medium inlet joint 52 and at least one medium outlet joint 53, so that the heat exchange medium flows into and out of the heat exchange part 40. As Figure 2 shown, the present application takes the case where the connection joints 51 are set to two as an example for illustration. One connection joint 51 is configured as a medium inlet joint 52, and the other connection joint 51 is configured as a medium outlet joint 53. In some examples, the medium inlet joint 52 is connected to the heat exchange part inlet 44 of the heat exchange part 40, and the medium outlet joint 53 is connected to the heat exchange part outlet 45 of the heat exchange part 40. The heat exchange part inlet 44 and the heat exchange part outlet 45 are connected through the heat exchange flow path in the heat exchange part 40. The plurality of connection joints 51 are arranged on the outer side of the mounting side plate 30 facing away from the mounting cavity.

[0111] The connecting joint 51 can be configured as a multi-way joint. The connecting joint 51 can have multiple interfaces, and the multiple interfaces can communicate with each other. One interface of the medium inflow joint 52 can communicate with a medium source, where the medium source refers to a device that provides a heat exchange medium. The other interfaces of the medium inflow joint 52 are respectively connected to the corresponding heat exchange parts 40. One interface of the medium outflow joint 53 can communicate with the medium source, and the other interfaces of the medium outflow joint 53 are respectively connected to the corresponding heat exchange parts 40, so that a medium circulation flow path can be formed, and further the heat exchange medium can continuously take away the heat of the battery device 100.

[0112] In some examples, the connecting joint 51 can also be configured as a multi-way solenoid valve. The multiple interfaces of the multi-way solenoid valve can be selectively connected. One interface of the multi-way solenoid valve configured as the medium inflow joint 52 can communicate with the medium source, and one interface of the multi-way solenoid valve configured as the medium outflow joint 53 can communicate with the medium source. By controlling the multi-way solenoid valve configured as the medium inflow joint 52, the heat exchange medium can be controlled to flow into the corresponding heat exchange part 40, and by controlling the multi-way solenoid valve configured as the medium outflow joint 53, the heat exchange medium in the corresponding heat exchange part 40 can be controlled to flow out.

[0113] It should be noted that the structure of the existing connecting mechanism is complex and difficult to manufacture, resulting in complex assembly of the battery device and high production and manufacturing costs.

[0114] In the above technical solution, by providing multiple connecting joints 51, the effect of the heat exchange medium flowing into and out of the heat exchange part 40 can be achieved, so that the heat exchange medium can continuously take away the heat of the battery device 100. Moreover, it is beneficial to simplify the structure of the connecting mechanism 50, facilitate the production and manufacturing of the battery device 100, reduce the assembly difficulty of the battery device 100, and also reduce the manufacturing cost of the battery device 100. And, by arranging multiple connecting joints 51 on the side of the mounting side plate 30 away from the mounting cavity, the effect of arranging part of the structure of the connecting mechanism 50 on the side of the mounting side plate 30 away from the mounting cavity is achieved.

[0115] According to some embodiments of the present application, as Figure 2 and Figure 3 shown, multiple connecting joints 51 are arranged in sequence along the third direction, and the first direction, the second direction and the third direction all intersect.

[0116] Among them, the third direction and the first direction can be one of an acute angle, an obtuse angle and a right angle. The third direction and the second direction can be one of an acute angle, an obtuse angle and a right angle. In the present application, the case where the first direction, the second direction and the third direction are perpendicular to each other is taken as an example for illustration.

[0117] As Figure 2 shown, the third direction is Figure 2In the Y direction, a plurality of connecting joints 51 are arranged in sequence along the third direction. The plurality of connecting joints 51 are arranged oppositely along the third direction, and the plurality of connecting joints 51 are arranged at intervals in sequence along the third direction. If the plurality of connecting joints 51 are arranged in sequence along the second direction, the size of the battery device 100 along the second direction will be increased, which is not convenient for installing the battery device 100 on the electrical device. Moreover, the connecting joint 51 is communicated with the corresponding heat exchange part 40 through a connecting pipe. If the plurality of connecting joints 51 are arranged in sequence along the first direction, it may cause interference between the plurality of connecting pipes, which is not convenient for the arrangement of the connecting pipes.

[0118] In the above technical solution, by arranging the plurality of connecting joints 51 in sequence along the third direction, the plurality of connecting joints 51 can be reasonably arranged, the space of the battery device 100 along the third direction can be effectively utilized. Compared with the arrangement of the plurality of connecting joints 51 in sequence along the second direction, the size of the battery device 100 along the second direction can be effectively reduced, which is convenient for installing the battery device 100 on the electrical device, making the overall structure of the battery device 100 compact. Compared with the arrangement of the plurality of connecting joints 51 in sequence along the first direction, the risk of interference between the plurality of connecting pipes is reduced, which is convenient for the arrangement of the connecting pipes, reducing the assembly difficulty of the battery device 100, and being beneficial to improving the assembly efficiency of the battery device 100.

[0119] According to some embodiments of the present application, each connecting joint 51 has a first interface 511. The first interface 511 of the medium inflow joint 52 is the medium inlet, and the first interface 511 of the medium outflow joint 53 is the medium outlet. The orientation of the medium inlet and the orientation of the medium outlet are the same.

[0120] Among them, as Figure 3 and Figure 13 shown, each connecting joint 51 has a first interface 511. The first interface 511 of the medium inflow joint 52 is the medium inlet, and the medium inlet can be communicated with the medium source outlet of the medium source. The first interface 511 of the medium outflow joint 53 is the medium outlet, and the medium outlet can be communicated with the medium source inlet of the medium source. As an example, the medium source can be the water storage device of the electrical device, the medium source outlet is the water outlet of the water storage device, and the medium source inlet is the water inlet of the water storage device. The water in the water storage device flows to the medium inlet through the water outlet of the water storage device, and the heat exchange medium in the heat exchange part 40 flows into the water storage device through the medium outlet and the water inlet of the water storage device. The orientation of the medium inlet and the orientation of the medium outlet are the same, that is to say, the medium inlet and the medium outlet are arranged on the same side of the connecting joint 51. The medium inlet and the medium outlet can both be arranged on the same side of the connecting joint 51 along the first direction, or the medium inlet and the medium outlet can both be arranged on the same side of the connecting joint 51 along the second direction.

[0121] It should be noted that both the medium inlet and the medium outlet are connected to the water storage device through pipelines. If the orientations of the medium inlet and the medium outlet are inconsistent, during the pipeline connection operation, construction workers need to repeatedly adjust the pipeline orientation. The pipeline connection is complex, and there is a risk of pipeline leakage due to the complex pipeline connection. Moreover, the pipeline connection time is increased, affecting the installation efficiency of the battery device 100.

[0122] In the above technical solution, since the orientations of the medium inlet and the medium outlet are the same, during the pipeline connection operation, construction workers do not need to repeatedly adjust the pipeline orientation, can quickly and accurately complete the pipeline connection, reduce the pipeline connection time, improve the assembly efficiency of the battery device 100, and at the same time reduce the risk of pipeline leakage caused by complex pipeline connection, laying a solid foundation for the efficient and stable operation of the entire thermal management system of the battery device 100.

[0123] According to some embodiments of the present application, as Figure 3 shown, the medium inlet and the medium outlet are arranged along a third direction.

[0124] Among them, the medium inlet and the medium outlet are arranged along the third direction, and along the third direction, the orientations of the medium inlet and the medium outlet are the same. That is to say, the medium inlet and the medium outlet are arranged on the same side of the battery device 100 along the third direction. In some examples, the central axes of the medium inlet and the medium outlet both extend along the third direction, and the central axes of the medium inlet and the medium outlet may coincide.

[0125] In the above technical solution, by arranging the medium inlet and the medium outlet along the third direction, the medium inlet and the medium outlet are arranged on the same side of the battery device 100 along the third direction. During the pipeline connection operation, construction workers do not need to repeatedly adjust the pipeline orientation, can more quickly and accurately complete the pipeline connection, is conducive to further reducing the pipeline connection time, is conducive to further improving the assembly efficiency of the battery device 100, and is conducive to further reducing the risk of pipeline leakage caused by complex pipeline connection.

[0126] According to some embodiments of the present application, as Figure 3 and Figure 13 shown, the battery device 100 further includes: a plurality of plugs 60, and the plurality of plugs 60 are respectively used to block the corresponding first interfaces 511.

[0127] The battery device 100 may further include: a plurality of plugging covers 60, which are detachably disposed on the plurality of connecting joints 51, and the plurality of plugging covers 60 are respectively used to block the first interfaces 511 of the corresponding connecting joints 51. In some examples, the connecting joint 51 has a first interface 511, and the number of plugging covers 60 is the same as the number of connecting joints 51, and the plurality of connecting joints 51 and the plurality of plugging covers 60 are assembled one by one. When the battery device 100 is not installed on the electrical device, the plugging cover 60 is fixed at the first interface 511 of the corresponding connecting joint 51, and the plugging cover 60 blocks the corresponding first interface 511, thereby reducing the risk of external substances of the battery device 100 flowing into the connecting joint 51 and the heat exchange part 40 through the first interface 511, which is conducive to keeping the connecting joint 51 and the heat exchange part 40 clean, and can also reduce the risk of blockage of the connecting joint 51 and the heat exchange part 40. When the battery device 100 needs to be installed on an electrical device, the plug cover 60 is removed from the connecting connector 51 , and the battery device 100 and the electrical device can be installed.

[0128] In the above technical solution, by providing a plurality of plugging covers 60, when the battery device 100 is not installed on the electrical device, the plugging cover 60 is fixed at the first interface 511 of the corresponding connecting joint 51, and the plugging cover 60 blocks the corresponding first interface 511, thereby reducing the risk of external substances of the battery device 100 flowing into the connecting joint 51 and the heat exchange part 40 through the first interface 511, which is conducive to keeping the connecting joint 51 and the heat exchange part 40 clean, and can also reduce the risk of blockage of the connecting joint 51 and the heat exchange part 40. When the battery device 100 needs to be installed on the electrical device, the plugging cover 60 is removed from the connecting joint 51, and the battery device 100 and the electrical device can be installed.

[0129] According to some embodiments of the present application, Figure 3 , Figure 6 and Figure 7 As shown, the mounting side plate 30 includes: a first plate body 31 and a second plate body 32. Along the first direction, the first plate body 31 is located on the side of the second plate body 32 away from the box body 21. The first plate body 31 and the second plate body 32 are bent and connected to form an installation space 33 on the side of the first plate body 31 away from the installation cavity. At least a portion of each connecting joint 51 is located in the installation space 33.

[0130] Among them, the mounting side plate 30 includes: a first plate body 31 and a second plate body 32, the first plate body 31 and the second plate body 32 are fixedly connected, the first plate body 31 and the second plate body 32 can be integrally formed, the first plate body 31 and the second plate body 32 can be welded and connected, and the first plate body 31 and the second plate body 32 can also be fixedly connected by bolts. The present application takes the integral forming of the first plate body 31 and the second plate body 32 as an example for explanation. The integral forming of the first plate body 31 and the second plate body 32 is beneficial to improving the structural strength of the mounting side plate 30, reducing the risk of fracture at the connection between the first plate body 31 and the second plate body 32, and can also reduce the number of molds for producing the mounting side plate 30, which is beneficial to reducing the manufacturing cost of the mounting side plate 30, thereby helping to reduce the manufacturing cost of the battery device 100.

[0131] Along the first direction, the first plate 31 is located at the side of the second plate 32 away from the box body 21, which can also be understood as the first plate 31 is located between the second plate 32 and the box cover 22, and the second plate 32 is located at the side of the first plate 31 away from the box cover 22. The first plate 31 and the second plate 32 are bent and connected, so that the installation side plate 30 can be constructed as an "L"-shaped structure or a similar "L"-shaped structure. Along the second direction, the spacing distance between the inner ends of the first plate 31 and the second plate 32 is smaller than the spacing distance between the outer ends of the first plate 31 and the second plate 32. Further, the inner ends of the first plate 31 and the second plate 32 are adjacently arranged, so that the installation space 33 can be formed on the side of the first plate 31 away from the installation cavity. At least part of each connecting joint 51 is located in the installation space 33, that is, part of the structure of each connecting joint 51 is located in the installation space 33, or the entire structure of each connecting joint 51 is located in the installation space 33.

[0132] It should be noted that, along the second direction, the inner end of the second plate body 32 refers to the end of the second plate body 32 facing the installation cavity, and the outer end of the second plate body 32 refers to the end of the second plate body 32 away from the installation cavity.

[0133] In the above technical solution, the first plate body 31 and the second plate body 32 are bent and connected to form an installation space 33 on the side of the first plate body 31 away from the installation cavity, so that the installation side plate 30 can be recessed into the installation cavity, and at least a portion of each connecting joint 51 is located in the installation space 33, which is beneficial to further reduce the size of the battery device 100 along the second direction, and can make the structure of the battery device 100 more compact, thereby helping to reduce the volume of the battery device 100.

[0134] According to some embodiments of the present application, Figure 6 and Figure 13 As shown, each connecting joint 51 has a second interface 512 , the second interface 512 is in communication with the first interface 511 of the corresponding connecting joint 51 , and the second interface 512 is used to communicate with the corresponding heat exchange portion 40 .

[0135] Among them, each connecting joint 51 has a second interface 512. The first interface 511 and the second interface 512 of the connecting joint 51 are connected. The second interface 512 is used to communicate with the corresponding heat exchange part 40. Specifically, the second interface 512 of the medium inlet joint 52 can be communicated with the heat exchange part inlet 44 of the corresponding heat exchange part 40, and the second interface 512 of the medium outlet joint 53 can be communicated with the heat exchange part outlet 45 of the corresponding heat exchange part 40. The second interface 512 of the medium inlet joint 52 can be communicated with the heat exchange part inlet 44 of the heat exchange part 40 through a connecting pipe, and the second interface 512 of the medium outlet joint 53 can be communicated with the heat exchange part outlet 45 of the heat exchange part 40 through a connecting pipe.

[0136] In some embodiments, each connecting joint 51 has one second interface 512. The second interface 512 of the medium inlet joint 52 is simultaneously communicated with the heat exchange part inlets 44 of multiple heat exchange parts 40, and the second interface 512 of the medium outlet joint 53 is simultaneously communicated with the heat exchange part outlets 45 of multiple heat exchange parts 40.

[0137] In some embodiments, each connecting joint 51 has multiple second interfaces 512. The multiple second interfaces 512 of the medium inlet joint 52 are respectively communicated with multiple heat exchange parts 40, and each heat exchange part 40 is communicated with at least one second interface 512 of the medium inlet joint 52. The multiple second interfaces 512 of the medium outlet joint 53 are respectively communicated with multiple heat exchange parts 40, and each heat exchange part 40 is communicated with at least one second interface 512 of the medium outlet joint 53.

[0138] In the above technical solution, by providing the second interface 512 on the connecting joint 51, the effect of connecting the connecting joint 51 with the corresponding heat exchange part 40 can be achieved. Moreover, since the first interface 511 and the second interface 512 of the medium inlet joint 52 are connected, the effect that the heat exchange medium flows into the corresponding heat exchange part 40 along the first interface 511 and the second interface 512 can be achieved. Also, since the first interface 511 and the second interface 512 of the medium outlet joint 53 are connected, the effect that the heat exchange medium in the heat exchange part 40 flows out through the second interface 512 and the first interface 511 can be achieved.

[0139] According to some embodiments of the present application, as Figure 6 and Figure 13 shown, each connecting joint 51 has multiple second interfaces 512, and the multiple second interfaces 512 are in one-to-one correspondence and communication with multiple heat exchange parts 40.

[0140] Among them, each connecting joint 51 has a plurality of second interfaces 512. Each connecting joint 51 can be provided with two, three, four, five or other numbers of second interfaces 512. The number of second interfaces 512 provided on each connecting joint 51 is the same as the number of heat exchange parts 40 provided. The plurality of second interfaces 512 of each connecting joint 51 are respectively in one-to-one correspondence and communication with a plurality of heat exchange parts 40. The first interface 511 of each connecting joint 51 is in communication with the plurality of second interfaces 512.

[0141] In some examples, each connecting joint 51 is provided with two second interfaces 512, and the heat exchange parts 40 are provided in two. One second interface 512 of each connecting joint 51 is in communication with one heat exchange part 40, and the other second interface 512 of each connecting joint 51 is in communication with the other heat exchange part 40. In other examples, each connecting joint 51 is provided with three second interfaces 512, and the heat exchange parts 40 are provided in three. The three second interfaces 512 of each connecting joint 51 are respectively in communication with the three heat exchange parts 40. This application takes the example that each connecting joint 51 is provided with two second interfaces 512 and the heat exchange parts 40 are provided in two for illustration. In the above technical solution, by respectively connecting the plurality of second interfaces 512 of each connecting joint 51 with a plurality of heat exchange parts 40 in one-to-one correspondence, it is beneficial for the heat exchange medium to uniformly flow into the plurality of heat exchange parts 40 through the medium inflow joint 52, which is beneficial to improving the heat exchange consistency of the heat exchange parts 40, beneficial to reducing the temperature difference of the multi-layer battery pack 91, beneficial to improving the reliability of the battery device 100, and also beneficial to enabling the heat exchange medium in the plurality of heat exchange parts 40 to flow into the medium outflow joint 53 synchronously.

[0142] According to some embodiments of the present application, as Figure 6 and Figure 11 shown, the mounting side plate 30 is formed with a plurality of avoidance structures. The plurality of avoidance structures are in one-to-one correspondence with the plurality of connecting joints 51. Each avoidance structure includes an avoidance hole 71 communicating with the installation cavity. The plurality of second interfaces 512 of the connecting joint 51 correspond to the avoidance holes 71 of the corresponding avoidance structures.

[0143] Among them, the installation side plate 30 is formed with a plurality of avoidance structures, and the plurality of avoidance structures and the plurality of communication joints 51 are arranged in one-to-one correspondence, that is, one communication joint 51 is correspondingly provided with one avoidance structure. Each avoidance structure includes an avoidance hole 71, and the avoidance hole 71 penetrates the installation side plate 30 along the thickness direction of the installation side plate 30. The avoidance hole 71 communicates with the installation cavity, and the plurality of second interfaces 512 of the communication joint 51 correspond to the avoidance holes 71 of the corresponding avoidance structure, so that the installation side plate 30 avoids the plurality of second interfaces 512 of the communication joint 51. As an example, each avoidance structure includes one avoidance hole 71, and one avoidance hole 71 of each avoidance structure corresponds to the plurality of second interfaces 512 of the corresponding communication joint 51 at the same time. As another example, each avoidance structure includes a plurality of avoidance holes 71, and the plurality of avoidance holes 71 of each avoidance structure respectively correspond to the plurality of second interfaces 512 of the corresponding communication joint 51, and each avoidance hole 71 corresponds to at least one second interface 512 of the corresponding communication joint 51.

[0144] In the above technical solution, since the installation side plate 30 is formed with a plurality of avoidance structures, each avoidance structure includes an avoidance hole 71 communicating with the installation cavity, and the plurality of second interfaces 512 of the communication joint 51 correspond to the avoidance holes 71 of the corresponding avoidance structure, it is convenient for the connecting pipe to connect the second interface 512 of the corresponding communication joint 51 and the corresponding heat exchange part 40, reducing the assembly difficulty of the connecting pipe, thereby reducing the assembly difficulty of the battery device 100, and further being beneficial to improving the assembly efficiency of the battery device 100 and the production efficiency of the battery device 100.

[0145] According to some embodiments of the present application, such as Figure 6 and Figure 11 shown, each avoidance structure includes a plurality of avoidance holes 71, and the plurality of second interfaces 512 of the communication joint 51 correspond to the plurality of avoidance holes 71 of the corresponding avoidance structure in one-to-one correspondence.

[0146] Among them, each avoidance structure may include a plurality of avoidance holes 71. Each avoidance structure may include two, three, four, five or other numbers of avoidance holes 71. The number of avoidance holes 71 included in each avoidance structure is the same as the number of the plurality of second interfaces 512 of the corresponding communication joint 51, and the plurality of avoidance holes 71 of each avoidance structure are arranged in one-to-one correspondence with the plurality of second interfaces 512 of the corresponding communication joint 51.

[0147] In the above technical solution, the multiple second interfaces 512 of the connecting joint 51 are arranged in a one-to-one correspondence with the multiple avoidance holes 71 of the corresponding avoidance structure, thereby reducing the risk of interference between the multiple connecting pipes connecting the connecting joint 51 and the multiple heat exchange parts 40, making it easier for the connecting pipes to connect the second interfaces 512 of the corresponding connecting joint 51 and the corresponding heat exchange parts 40, further reducing the difficulty of assembling the connecting pipes, thereby further reducing the difficulty of assembling the battery device 100, and further being more conducive to improving the assembly efficiency of the battery device 100, and further improving the production efficiency of the battery device 100.

[0148] According to some embodiments of the present application, Figure 6 and Figure 11 As shown, each avoidance structure includes two avoidance holes 71, the two avoidance holes 71 are respectively a first avoidance hole 711 and a second avoidance hole 712, the first plate body 31 is formed with the first avoidance hole 711, and the second plate body 32 is formed with the second avoidance hole 712. Each connecting joint 51 has two second interfaces 512, and a second interface 512 is formed on the side of the connecting joint 51 facing the first plate body 31 and the side facing the second plate body 32, respectively, and the two second interfaces 512 correspond to the corresponding first avoidance hole 711 and the second avoidance hole 712, respectively.

[0149] Among them, each avoidance structure may include two avoidance holes 71, the two avoidance holes 71 are respectively a first avoidance hole 711 and a second avoidance hole 712, the first plate body 31 is formed with a first avoidance hole 711, the first avoidance hole 711 passes through the first plate body 31, and the first avoidance hole 711 is connected to the installation cavity, and the second plate body 32 is formed with a second avoidance hole 712, the second avoidance hole 712 passes through the second plate body 32, and the second avoidance hole 712 is connected to the installation cavity.

[0150] Each connecting joint 51 has two second interfaces 512. Along the second direction, the connecting joint 51 is located on the side of the first plate body 31 away from the installation cavity, and a second interface 512 is formed on the side of the connecting joint 51 facing the first plate body 31. Along the first direction, the connecting joint 51 is located on the side of the second plate body 32 away from the box body 21. In other words, the connecting joint 51 is located above the second plate body 32, and another second interface 512 is formed on the side of the connecting joint 51 facing the second plate body 32. The two second interfaces 512 of each connecting joint 51 correspond to the corresponding first avoidance hole 711 and the second avoidance hole 712, respectively, that is, one second interface 512 of each connecting joint 51 is arranged corresponding to the first avoidance hole 711, and the other second interface 512 of each connecting joint 51 is arranged corresponding to the second avoidance hole 712.

[0151] In the above technical solution, a first avoidance hole 711 is formed through the first plate body 31, a second avoidance hole 712 is formed through the second plate body 32, and a second interface 512 is formed on each of the side of the communication joint 51 facing the first plate body 31 and the side facing the second plate body 32, enabling multiple second interfaces 512 of the communication joint 51 to be arranged on different sides of the communication joint 51, facilitating the correspondence between the two second interfaces 512 of each communication joint 51 and the corresponding first avoidance hole 711 and second avoidance hole 712 respectively, so that the arrangement positions of the second interfaces 512 of the communication joint 51 and the avoidance holes 71 are reasonable, and facilitating the communication pipe to connect the second interfaces 512 of the corresponding communication joint 51 and the corresponding heat exchange part 40.

[0152] According to some embodiments of the present application, as Figure 8 , Figure 11 and Figure 13 shown, a first connecting column 513 is formed on the side of each communication joint 51 facing the second plate body 32, a second interface 512 is formed on the first connecting column 513, and the first connecting column 513 passes through the second avoidance hole 712.

[0153] Among them, along the first direction, a partial structure of the installation cavity is formed below the second plate body 32. A first connecting column 513 is formed on the side of each communication joint 51 facing the second plate body 32, and a second interface 512 is formed on the first connecting column 513. Specifically, the first connecting column 513 is an annular structure to define the second interface 512. When the communication joint 51 is installed on the installation side plate 30, the first connecting column 513 of the communication joint 51 can pass through the second avoidance hole 712 of the corresponding avoidance structure from top to bottom.

[0154] In the above technical solution, by passing the first connecting column 513 of the communication joint 51 through the corresponding second avoidance hole 712, the first connecting column 513 can extend into the installation cavity, facilitating the connection of the communication pipe between the first connecting column 513 and the corresponding heat exchange part 40, further improving the connection efficiency of the communication pipe. Moreover, the first connecting column 513 can abut against and be limited by the inner side wall of the second avoidance hole 712, and the communication joint 51 can be reliably fixed to the installation side plate 30.

[0155] According to some embodiments of the present application, as Figure 6 and Figure 10 shown, the communication mechanism 50 may further include: a plurality of communication structures 80, at least a part of the plurality of communication structures 80 is arranged in the assembly space 231, the plurality of communication structures 80 correspond to the plurality of communication joints 51 one by one, and the communication structure 80 communicates the corresponding communication joint 51 and the plurality of heat exchange parts 40.

[0156] Among them, as Figure 6 and Figure 10As shown, the connection mechanism 50 may further include: a plurality of connection structures 80, at least part of the plurality of connection structures 80 is disposed in the assembly space 231. It should be noted that at least part of the structure of at least one connection structure 80 may be disposed in the assembly space 231. As an example, at least part of the structure of each connection structure 80 is disposed in the assembly space 231. As another example, at least part of the structure of one connection structure 80 may be disposed in the assembly space 231. As another example, at least part of the structure of two connection structures 80 may be disposed in the assembly space 231. The number of connection structures 80 may be set to two, three, four, five, etc. The number of connection structures 80 provided may be the same as the number of connection joints 51 provided. The plurality of connection structures 80 and the plurality of connection joints 51 are connected in one-to-one correspondence. In this application, it is described by taking the connection structures 80 and the connection joints 51 both being provided with two as an example. Each connection structure 80 connects the corresponding connection joint 51 and a plurality of heat exchange parts 40. The connection structure 80 may include a connection pipe, and the connection pipe connects the second interface 512 of the corresponding connection joint 51 and the corresponding heat exchange part 40. As an example, each connection structure 80 may include a plurality of connection pipes. The plurality of connection pipes of each connection structure 80 respectively connect the plurality of second interfaces 512 of the corresponding connection joint 51 and the corresponding heat exchange part 40. The plurality of connection pipes, the plurality of second interfaces 512 of the corresponding connection joint 51, and the plurality of heat exchange parts 40 are connected in one-to-one correspondence. As another example, each connection structure 80 may include a plurality of connection pipes, and at least one connection pipe of each connection structure 80 connects one second interface 512 of the corresponding connection joint 51 and a plurality of heat exchange parts 40.

[0157] In the above technical solution, by providing a plurality of connection structures 80, the connection structures 80 can connect the corresponding connection joints 51 and a plurality of heat exchange parts 40, achieving the effect of connecting the corresponding connection joints 51 and a plurality of heat exchange parts 40. Moreover, the plurality of connection structures 80 can be produced using the same mold, which is beneficial to reducing the manufacturing cost of the battery device 100. Also, the plurality of connection structures 50 can be produced using the same mold, which is beneficial to reducing the manufacturing cost of the battery device 100. In addition, at least part of the plurality of connection structures 80 is disposed in the assembly space 231, reducing the occupation of the space in the installation cavity by the plurality of connection structures 80.

[0158] According to some embodiments of the present application, multiple heat exchange parts 40 include: a first heat exchange part 41 and a second heat exchange part 42. Along the first direction, the first heat exchange part 41 is located between the box cover 22 and the second heat exchange part 42. A second interface 512 is respectively formed on the side of the connecting joint 51 facing the first plate body 31 and the side facing the second plate body 32. The connecting structure 80 includes a first connecting pipe 81 and a second connecting pipe 82. The first connecting pipe 81 connects the first heat exchange part 41 and the second interface 512 of the corresponding connecting joint 51 on the side facing the first plate body 31. The second connecting pipe 82 connects the second heat exchange part 42 and the second interface 512 of the corresponding connecting joint 51 on the side facing the second plate body 32. The second connecting pipe 82 is arranged in the assembly space 231.

[0159] Among them, Figure 3 , Figure 6 and Figure 13 As shown, two heat exchange parts 40 are provided, and the two heat exchange parts 40 include a first heat exchange part 41 and a second heat exchange part 42. Along the first direction, the first heat exchange part 41 is located between the box cover 22 and the second heat exchange part 42, and the second heat exchange part 42 is located on the side of the first heat exchange part 41 away from the box cover 22. It can also be understood that the second heat exchange part 42 is located below the first heat exchange part 41, and the first heat exchange part 41 and the second heat exchange part 42 are spaced apart along the first direction, and at least one layer of battery pack 91 can be formed between the first heat exchange part 41 and the second heat exchange part 42. Along the second direction, a second interface 512 is formed on the side of the connecting joint 51 facing the first plate body 31, and a second interface 512 is formed on the side of the connecting joint 51 facing the second plate body 32 along the first direction, and the second interface 512 is formed on different sides of the connecting joint 51.

[0160] The connecting structure 80 includes a first connecting pipe 81 and a second connecting pipe 82. The first connecting pipe 81 is located above the second connecting pipe 82. One end of the first connecting pipe 81 is connected to the second interface 512 of the connecting joint 51 facing the first plate body 31, and the other end of the first connecting pipe 81 is connected to the first heat exchange part 41, so that the first connecting pipe 81 connects the first heat exchange part 41 and the second interface 512 of the corresponding connecting joint 51 facing the first plate body 31. One end of the second connecting pipe 82 is connected to the second interface 512 of the corresponding connecting joint 51 facing the second plate body 32, and the other end of the second connecting pipe 82 is connected to the second heat exchange part 42, so that the second connecting pipe 82 connects the second heat exchange part 42 and the second interface 512 of the corresponding connecting joint 51 facing the second plate body 32. The second connecting pipe 82 is arranged in the assembly space 231. It should be noted that part of the structure of the second connecting pipe 82 is arranged in the assembly space 231, or the entire structure of the second connecting pipe 82 is arranged in the assembly space 231.

[0161] In the above technical solution, by providing the first heat exchange part 41, the second heat exchange part 42, the first connecting pipe 81 and the second connecting pipe 82, and the connecting joint 51 is respectively formed with a second interface 512 on the side facing the first plate body 31 and the side facing the second plate body 32, the risk of interference between the first connecting pipe 81 and the second connecting pipe 82 can be reduced, and the space in the installation cavity can be fully utilized, making the overall structure of the battery device 100 more compact and reasonable. In addition, the second connecting pipe 82 is arranged in the assembly space 231, reducing the occupation of the second connecting pipe 82 in the installation cavity.

[0162] According to some embodiments of the present application, Figure 6 and Figure 12 As shown, the first side wall 211 includes a side wall body 2111, and the side wall body 2111 and the mounting side plate 30 are arranged and connected along a first direction. Along the second direction, the assembly space 231 is located between the mounting cavity and the side wall body 2111, and the second connecting tube 82 extends along the first direction. An avoidance groove 212 is formed on the inner surface of the side wall body 2111, and at least a portion of the second connecting tube 82 is located in the avoidance groove 212.

[0163] The box body 21 has a first side wall 211. Along the second direction, the first side wall 211 and the mounting side plate 30 are located on the same side of the mounting cavity. The first side wall 211 and the mounting side plate 30 are arranged opposite to each other along the first direction. It should be noted that the first side wall 211 and the mounting side plate 30 can be arranged opposite to each other along the first direction in part of the structure, or the first side wall 211 and the mounting side plate 30 can be arranged opposite to each other along the first direction in the whole structure. The first side wall 211 is located below the second plate body 32. The first side wall 211 includes a side wall body 2111. The side wall body 2111 and the second plate body 32 are arranged and connected along the first direction. Along the second direction, the second avoidance hole 712 on the second plate body 32 is located on the inner side of the side wall body 2111. The inner side of the side wall body 2111 refers to the side of the side wall body 2111 facing the mounting cavity. The second avoidance hole 712 on the second plate body 32 and the side wall body 2111 are staggered along the first direction. In the first direction, the second connecting tube 82 can be arranged below the second plate 32, the second connecting tube 82 can be extended in the installation cavity along the first direction, the second connecting tube 82 can be extended obliquely along the first direction, or the second connecting tube 82 can be extended in a straight line along the first direction. This application takes the example of the second connecting tube 82 extending obliquely from bottom to top toward the side wall body 2111 as an example for explanation.

[0164] The inner surface of the side wall body 2111 is formed with an escape groove 212, and there may be multiple escape grooves 212. Each escape groove 212 is correspondingly arranged with at least one connecting structure 80 along the second direction. The present application is described by taking multiple escape grooves 212 and multiple connecting structures 80 as an example of one-to-one correspondence. At least part of the second connecting pipe 82 is located in the escape groove 212, which can also be understood as that part of the structure of the second connecting pipe 82 is assembled in the corresponding escape groove 212, or the entire structure of the second connecting pipe 82 is assembled in the corresponding escape groove 212.

[0165] In the above technical solution, an avoidance groove 212 is formed by the side wall body 2111, and at least a part of the structure of the second connecting tube 82 of the connecting structure 80 can be assembled in the corresponding avoidance groove 212, thereby reducing the space occupied by the second connecting tube 82 in the assembly space 231, so that there is more space in the installation cavity to install the battery cell 10, which is beneficial to further improve the energy density of the battery device 100, and is also beneficial to further improve the space utilization rate of the installation cavity in the battery device 100, and can also make the overall structure of the battery device 100 more compact.

[0166] According to some embodiments of the present application, the first side wall 211 also includes a mounting boss 213, and the mounting boss 213 is formed on the inner surface of the side wall body 2111 near the mounting cavity, so that the side wall body 2111 and the mounting boss 213 jointly define an assembly space 231, and the mounting boss 213 is formed with a mounting hole 214, and the mounting hole 214 passes through the mounting boss 213 along a first direction. Along the first direction, the mounting boss 213 and the second plate body 32 are opposite, and the assembly space 231 is located between the mounting boss 213 and the second plate body 32, and the second heat exchange part 42 is located on the side of the mounting boss 213 away from the box cover 22, and the second heat exchange part 42 has a second connecting column 43 protruding toward the mounting boss 213, and the second connecting column 43 is passed through the mounting hole 214, and the second connecting pipe 82 and the second connecting column 43 are connected to connect the second connecting pipe 82 and the second heat exchange part 42.

[0167] Among them, Figure 6 and Figure 12As shown, the inner surface of the side wall body 2111 near the mounting cavity is provided with a mounting boss 213, and the mounting boss 213 and the side wall body 2111 can be integrally formed, and along the second direction, the mounting boss 213 protrudes from the inner surface of the side wall body 2111 into the mounting cavity. The mounting boss 213 and the second plate body 32 are arranged opposite to and spaced apart along the first direction, and along the first direction, the second connecting pipe 82 can be arranged between the mounting boss 213 and the second plate body 32, and the mounting boss 213 is formed with a mounting hole 214, and the mounting hole 214 penetrates the mounting boss 213 along the first direction, and the second heat exchange part 42 is located on the side of the mounting boss 213 away from the box cover 22, in other words, the second heat exchange part 42 is arranged below the mounting boss 213. Along the first direction, the second heat exchange part 42 can abut against the surface of the mounting boss 213 facing away from the box cover 22. It can also be understood that the second heat exchange part 42 abuts against the lower surface of the mounting boss 213. The mounting boss 213 can limit the second heat exchange part 42 to reduce the risk of the second heat exchange part 42 moving toward the first heat exchange part 41.

[0168] The second heat exchange part 42 has a second connecting column 43 protruding toward the mounting boss 213, the second connecting column 43 extends along the first direction, the second connecting column 43 is penetrated in the mounting hole 214, and the second connecting pipe 82 is connected to the second connecting column 43 so that the second connecting pipe 82 is connected to the second heat exchange part 42. The second heat exchange part 42 may have a plurality of second connecting columns 43, the second connecting columns 43 are annular, some of the second connecting columns 43 of the second heat exchange part 42 define the heat exchange part inlet 44, and another part of the second connecting columns 43 of the second heat exchange part 42 define the heat exchange part outlet 45. The mounting boss 213 may be formed with a plurality of mounting holes 214, and the plurality of mounting holes 214 correspond to the plurality of second connecting columns 43 one by one, and each mounting hole 214 has a second connecting column 43 penetrated therein.

[0169] As an example, the second heat exchange part 42 has two second connecting columns 43, one second connecting column 43 defines a heat exchange part inlet 44, and the other second connecting column 43 defines a heat exchange part outlet 45. The second connecting pipe 82 connected to the medium inlet joint 52 is connected to the second connecting column 43 defining the heat exchange part inlet 44, and the second connecting pipe 82 connected to the medium outlet joint 53 is connected to the second connecting column 43 defining the heat exchange part outlet 45.

[0170] In the above technical solution, an installation boss 213 is provided on the inner surface of the side wall body 2111, achieving the effect that the first side wall 211 defines an assembly space 231. The installation boss 213 can limit the position of the second heat exchange part 42, reducing the risk of the second heat exchange part 42 moving towards the first heat exchange part 41. Moreover, the second connecting column 43 passes through the installation hole 214, facilitating the connection between the second communication pipe 82 and the corresponding heat exchange part 40, further improving the connection efficiency of the second communication pipe 82. Additionally, the second connecting column 43 can abut against and be limited by the inner side wall of the installation hole 214, and the second heat exchange part 42 can be reliably fixed in the installation cavity.

[0171] According to some embodiments of the present application, as Figure 6 and Figure 13 shown, the communication joint 51 is formed with an installation part 514, the installation part 514 is formed with a first installation hole 515, the first communication pipe 81 is formed with an installation flange 811, and the installation flange 811 is formed with a second installation hole. By passing a fastener through the second installation hole and assembling it in the first installation hole 515, the first communication pipe 81 is fixed to the installation part 514.

[0172] Among them, along the second direction, on the side of the communication joint 51 facing the first plate body 31, an installation part 514 is formed. As an example, the installation part 514 can be a threaded sleeve, the threaded sleeve is formed with a first installation hole 515, the first installation hole 515 is a threaded hole, one end of the first communication pipe 81 connected to the communication joint 51 can be formed with an installation flange 811, the installation flange 811 and the installation part 514 are arranged oppositely, the installation flange 811 is formed with a second installation hole, the second installation hole and the first installation hole 515 are arranged in one-to-one correspondence, the fastener can be a bolt, and the bolt can pass through the second installation hole of the installation flange 811 and be assembled in the first installation hole 515, so that the fastener is fixedly connected to the threaded sleeve, thereby fixing the first communication pipe 81 to the installation part 514, and further enabling the first communication pipe 81 to be reliably communicated with the corresponding second interface 512.

[0173] As another example, the installation part 514 can be a first clamping structure, one end of the first communication pipe 81 connected to the communication joint 51 can be formed with a second clamping structure, the first clamping structure is one of a clamping groove and a clamping boss, the second clamping structure is the other of a clamping groove and a clamping boss, and the clamping boss is clamped in the clamping groove, thereby fixing the first communication pipe 81 to the installation part 514, and further enabling the first communication pipe 81 to be reliably communicated with the corresponding second interface 512.

[0174] In the above technical solution, by forming an installation part 514 on the side of the communication joint 51 facing the first plate body 31, the first communication pipe 81 can be reliably fixed to the communication joint 51, thereby enabling the first communication pipe 81 to be reliably communicated with the corresponding second interface 512.

[0175] According to some embodiments of the present application, as Figure 6 and Figure 13 shown, there are multiple mounting parts 514, and the multiple mounting parts 514 are arranged around the second interface 512 on the corresponding side of the connection joint 51.

[0176] Among them, on the side of the connection joint 51 facing the first plate body 31, multiple mounting parts 514 are formed. The number of mounting parts 514 can be set to two, three, four, etc. On the side of the connection joint 51 facing the first plate body 31, a second interface 512 is formed. The multiple mounting parts 514 are arranged around the second interface 512 along the circumferential direction of the second interface 512, and the multiple mounting parts 514 can be evenly arranged along the circumferential direction of the second interface 512. As an example, two mounting parts 514 are formed on the side of the connection joint 51 facing the first plate body 31, and the two mounting parts 514 are respectively located on the opposite sides of the second interface 512.

[0177] In the above technical solution, by providing multiple mounting parts 514 and arranging the multiple mounting parts 514 around the second interface 512 on the corresponding side of the connection joint 51, the first connecting pipe 81 can be more reliably fixed to the connection joint 51, so that the first connecting pipe 81 is more reliably connected to the corresponding second interface 512.

[0178] According to some embodiments of the present application, as Figure 2 and Figure 3 shown, the mounting side plate 30 is clamped between the box cover 22 and the box body 21, and the mounting side plate 30 is fixed to at least one of the box body 21 and the box cover 22.

[0179] Among them, along the first direction, the mounting side plate 30 is clamped between the box cover 22 and the box body 21. The mounting side plate 30 can be fixed to the box body 21 or the box cover 22, or the mounting side plate 30 can be fixed to both the box body 21 and the box cover 22. The mounting side plate 30 can be detachably fixed to at least one of the box body 21 and the box cover 22. As an example, the mounting side plate 30 can be detachably fixed to at least one of the box body 21 and the box cover 22 by bolts. As another example, the mounting side plate 30 can be detachably fixed to at least one of the box body 21 and the box cover 22 by a clamping structure.

[0180] In the above technical solution, by clamping the mounting side plate 30 between the box cover 22 and the box body 21, the mounting side plate 30, the box cover 22 and the box body 21 can jointly define an installation cavity. By fixing the mounting side plate 30 to at least one of the box body 21 and the box cover 22, the mounting side plate 30, the box cover 22 and the box body 21 can be assembled into a whole, which is beneficial to improving the structural strength of the battery device 100.

[0181] According to some embodiments of the present application, asFigure 2 and Figure 3 As shown in Figure 3 , the lid 22 has a second side wall 221. The first side wall 211, the mounting side plate 30, and the second side wall 221 are arranged in the first direction, and the mounting side plate 30 is clamped between the first side wall 211 and the second side wall 221.

[0182] Among them, the box body 21 has a first side wall 211, and the lid 22 has a second side wall 221. Both the first side wall 211 and the second side wall 221 are side walls of the installation cavity. Along the first direction, the mounting side plate 30 is arranged between the first side wall 211 and the second side wall 221, and the mounting side plate 30 is clamped between the first side wall 211 and the second side wall 221. The mounting side plate 30 can be fixed to the first side wall 211, or the mounting side plate 30 can be fixed to the second side wall 221, or the mounting side plate 30 can be fixed to both the first side wall 211 and the second side wall 221.

[0183] In the above technical solution, by clamping the mounting side plate 30 between the first side wall 211 and the second side wall 221, the mounting side plate 30 can be arranged on one side of the installation cavity along the second direction, so that the arrangement position of the mounting side plate 30 is reasonable.

[0184] According to some embodiments of the present application, as Figure 2 and Figure 3 shown, the second side wall 221 is formed with a first assembly notch 222. At least part of the mounting side plate 30 is adapted to the shape of the first assembly notch 222, and the mounting side plate 30 is assembled in the first assembly notch 222.

[0185] Among them, the second side wall 221 is formed with a first assembly notch 222. The first assembly notch 222 communicates with the installation cavity. The first assembly notch 222 penetrates the second side wall 221 along the second direction. And in the first direction, the end of the first assembly notch 222 close to the first side wall 211 can extend towards the end of the first side wall 211 to the end of the second side wall 221. The lid 22 and the box body 21 are assembled in cooperation along the first direction, the first assembly notch 222 is open, at least part of the mounting side plate 30 is assembled in the first assembly notch 222, and the mounting side plate 30 can cover the first assembly notch 222, so that the mounting side plate 30, the lid 22, and the box body 21 jointly define the installation cavity. When part of the structure of the mounting side plate 30 is assembled in the first assembly notch 222, the shape of part of the structure of the mounting side plate 30 is adapted to the shape of the first assembly notch 222. When the entire structure of the mounting side plate 30 is assembled in the first assembly notch 222, the shape of the entire mounting side plate 30 is adapted to the shape of the first assembly notch 222. Shape adaptation means that the shape of the mounting side plate 30 is the same as or substantially the same as the shape of the first assembly notch 222.

[0186] In the above technical solution, a first assembly notch 222 is formed through the second side wall 221, which enables the mounting side plate 30 to be assembled in the first assembly notch 222, reducing the interference risk between the box cover 22 and the mounting side plate 30. Moreover, by making at least part of the mounting side plate 30 fit the shape of the first assembly notch 222, the second side wall 221 and the mounting side plate 30 can be made to fit, facilitating the mounting side plate 30 to cover the first assembly notch 222 and facilitating the mounting side plate 30, the box cover 22, and the box body 21 to jointly define the installation cavity.

[0187] According to some embodiments of the present application, as Figure 3 and Figure 11 shown, the second side wall 221 has a mounting flange 223. The mounting flange 223 is arranged along the edge of the first assembly notch 222. The end face of the mounting side plate 30 facing the second side wall 221 has a mounting structure 34. The mounting structure 34 is opposite to the mounting flange 223, and the mounting structure 34 is fixed to the mounting flange 223.

[0188] Among them, the second side wall 221 has a mounting flange 223. The mounting flange 223 extends along the edge of the first assembly notch 222. Mounting flanges 223 are formed at the edge positions of the first assembly notch 222. Along the second direction, a mounting flange 223 is formed on the outer surface of the second side wall 221 facing away from the installation cavity. The end face of the mounting side plate 30 facing the second side wall 221 has a mounting structure 34. Specifically, the end face of the first plate body 31 facing the second side wall 221 is provided with a mounting structure 34. The mounting structure 34 can be a plate-like structure. The mounting structure 34 is opposite to the mounting flange 223 along the first direction, and the mounting structure 34 is fixed to the mounting flange 223, thereby fixing the mounting side plate 30 to the box cover 22.

[0189] As an example, the mounting flange 223 is formed with a first assembly hole 224, and the mounting structure 34 is formed with a second assembly hole 35. Both the first assembly hole 224 and the second assembly hole 35 are multiple. The multiple first assembly holes 224 and the multiple second assembly holes 35 correspond one by one. By passing bolts through the corresponding first assembly hole 224 and second assembly hole 35, the mounting structure 34 is fixed to the mounting flange 223.

[0190] In the above technical solution, since the second side wall 221 has a mounting flange 223 and the end face of the mounting side plate 30 facing the second side wall 221 has a mounting structure 34, it is convenient for the mounting flange 223 and the mounting structure 34 to be assembled in cooperation, thereby facilitating the fixed assembly of the second side wall 221 and the mounting side plate 30, and further making the positions of the mounting flange 223 and the mounting structure 34 reasonable.

[0191] According to some embodiments of the present application, as Figure 2 and Figure 3 shown, the shapes of the mounting flange 223 and the mounting structure 34 are adapted to each other.

[0192] Among them, the shape of the mounting flange 223 is the same as that of the mounting structure 34. Or the shape of the mounting flange 223 is substantially the same as that of the mounting structure 34.

[0193] In the above technical solution, due to the shape adaptation between the mounting flange 223 and the mounting structure 34, it is beneficial to reliably assemble the mounting flange 223 and the mounting structure 34, and it is also convenient to seal the gap between the mounting flange 223 and the mounting structure 34.

[0194] According to some embodiments of the present application, as Figure 3 shown, the box body 21 further has two third side walls 215. The two third side walls 215 are spaced apart along the third direction. The first side wall 211 is located between the two third side walls 215. Along the first direction, the third side wall 215 has a protruding portion 216 that protrudes towards the box cover 22 from the first side wall 211. At the inner corner of the protruding portion 216, a second assembly notch 217 is formed. A part of the mounting side plate 30 is located between the two third side walls 215, and the mounting side plate 30 is assembled in the second assembly notch 217 so that the third side wall 215 restricts the mounting side plate 30 from moving towards the installation cavity along the second direction.

[0195] Among them, the box body 21 further has two third side walls 215. The two third side walls 215 are opposite and spaced apart along the third direction. The first side wall 211 is located between the two third side walls 215. Along the second direction, one end of the first side wall 211 is adjacently arranged with the third side wall 215.

[0196] And along the first direction, the third side wall 215 has a protruding portion 216 that protrudes towards the box cover 22 from the first side wall 211. The protruding portion 216 protrudes along the first direction from the surface of the first side wall 211 facing the box cover 22. Along the third direction, a second assembly notch 217 is formed at the inner corner of the protruding portion 216. A part of the structure of the mounting side plate 30 is located between the two third side walls 215, and the mounting side plate 30 is assembled at the second assembly notch 217 of the two third side walls 215. After the mounting side plate 30 is assembled at the second assembly notch 217 of the two third side walls 215, along the second direction, a part of the structure of the third side wall 215 is located inside the mounting side plate 30 and can abut against the mounting side plate 30, which can make the third side wall 215 restrict the mounting side plate 30 from moving towards the installation cavity along the second direction, thereby making the assembly of the mounting side plate 30 more stable.

[0197] In the above technical solution, the third side wall 215 has a protruding portion 216 that protrudes from the first side wall 211 toward the lid 22. A second assembly notch 217 is formed at the inner corner of the protruding portion 216. After the mounting side plate 30 is assembled to the second assembly notches 217 of the two third side walls 215, the third side wall 215 and the mounting side plate 30 are abutted and limited in the second direction. The third side wall 215 can limit the mounting side plate 30 from moving toward the installation cavity in the second direction, thereby making the assembly of the mounting side plate 30 more stable.

[0198] According to some embodiments of the present application, as Figure 3 shown, along the second direction, the second assembly notch 217 and the end of the third side wall 215 close to the first side wall 211 are adjacent. In the direction from the installation cavity to the first side wall 211, the second assembly notch 217 extends to the end of the third side wall 215 close to the first side wall 211. The mounting side plate 30 moves from the end of the third side wall 215 close to the first side wall 211 toward the installation cavity, and the mounting side plate 30 can be installed at the second assembly notch 217, and then the mounting side plate 30 and the lid 22 are fixedly assembled. When it is necessary to remove the mounting side plate 30, the mounting side plate 30 can be moved away from the installation cavity side in the second direction, and the mounting side plate 30 can be removed from the second assembly notch 217 at the end of the third side wall 215 close to the first side wall 211.

[0199] According to some embodiments of the present application, as Figure 5 shown, the heat exchange parts 40 are all configured as heat exchange plates.

[0200] Among them, the heat exchange plate is a plate-like structure, each heat exchange part 40 is a whole plate body, and the heat exchange part 40 can be made of a metal material.

[0201] In the above technical solution, by configuring the heat exchange part 40 as a heat exchange plate, it is beneficial to increase the heat exchange area between the heat exchange part 40 and the battery pack 91, and improve the heat exchange effect between the heat exchange part 40 and the battery cell 10.

[0202] According to some embodiments of the present application, as Figure 5 shown, at least one heat exchange part 40 is formed with at least one through hole 46. There are multiple battery packs 91 adjacent to the heat exchange part 40. At least two adjacent battery packs 91 among the battery packs 91 adjacent to the heat exchange part 40 are spaced apart. There is no need for heat exchange at the position between two adjacent battery packs 91. Along the first direction, the through hole 46 is disposed opposite to the position between two adjacent battery packs 91. By providing the through hole 46, it is beneficial to reduce the weight of the heat exchange part 40 and facilitate the lightweight design of the battery device 100.

[0203] According to some embodiments of the present application, as Figure 5As shown, at least one heat exchange part 40 is formed with a third assembly hole 47, specifically, the second heat exchange part 42 is formed with a third assembly hole 47, and there are multiple third assembly holes 47. Bolts pass through the third assembly holes 47 and are assembled with the mounting beam of the box body 21, so as to fix the second heat exchange part 42 to the box body 21.

[0204] According to some embodiments of the present application, Figure 3 As shown, the battery device 100 further includes: an electrical connection mechanism 90 , which is fixed to the mounting side plate 30 , and is located on a side of the mounting side plate 30 away from the mounting cavity.

[0205] The battery device 100 may further include: an electrical connection mechanism 90, the electrical connection mechanism 90 includes a high-voltage connection member and a low-voltage connection member of the battery device 100, the electrical connection mechanism 90 may be fixed to the mounting side plate 30 by bolts, or the electrical connection mechanism 90 may be fixed to the mounting side plate 30 by snapping. Along the second direction, the electrical connection mechanism 90 is located on the side of the mounting side plate 30 away from the mounting cavity, which may also be understood as the electrical connection mechanism 90 being disposed outside the mounting cavity.

[0206] In the above technical solution, by locating the electrical connection mechanism 90 on the side of the mounting side plate 30 away from the mounting cavity, the risk of the electrical connection mechanism 90 occupying the space in the mounting cavity is reduced, which is more conducive to increasing the space for arranging the battery cells 10 in the mounting cavity, so that more battery cells 10 can be installed in the mounting cavity, which is more conducive to improving the energy density of the battery device 100, and is also more conducive to improving the space utilization rate of the mounting cavity in the battery device 100, so that the electrical connection mechanism 90 is reasonably set.

[0207] According to some embodiments of the present application, the number of battery packs 91 is equal to the number of heat exchange units 40, and the multiple heat exchange units 40 are arranged in sequence along the first direction. A layer of battery packs 91 is arranged between any two adjacent heat exchange units 40, and a layer of battery packs 91 is arranged above the uppermost heat exchange unit 40, and the heat exchange unit 40 exchanges heat with the upper adjacent battery pack 91. The multiple heat exchange units 40 are independently arranged, and the heat exchange units 40 can more accurately perform thermal management on the heating characteristics of the corresponding battery packs 91, so that the battery cells 10 of each layer of battery packs 91 can operate stably under a suitable temperature environment, which is beneficial to improving the performance of the battery device 100 and also beneficial to improving the life of the battery device 100.

[0208] According to some embodiments of the present application, the present application further provides an electrical device, including the battery device 100 of the above embodiment, and the battery device 100 is used to store or provide electrical energy.

[0209] In the above technical solution, since the electrical device includes the battery device 100 of the above embodiment, the battery device 100 can store more electrical energy, and the battery device 100 can provide an energy guarantee for the efficient operation of the electrical device, meeting the usage requirements in more complex scenarios and enhancing the competitiveness of the electrical device in the market.

[0210] According to some embodiments of the present application, as Figures 3 - 15 shown, the present application provides a battery device 100, including: a box body 20, a communication mechanism 50, a multi-layer battery pack 91, and a plurality of heat exchange parts 40. Each layer of the battery pack 91 includes a plurality of battery cells 10 arranged on a first plane, and the multi-layer battery packs 91 are arranged in sequence along a first direction, and the first direction, the second direction, and the first plane are perpendicular to each other. The box body 20 defines an installation cavity for installing the multi-layer battery pack 91, and the box body 20 has an installation side wall 23. Along the second direction, the installation side wall 23 is located on one side of the installation cavity, and the installation side wall 23 forms an assembly space 231 that opens towards the installation cavity. Two heat exchange parts 40 are arranged in the installation cavity and are spaced apart from each other in sequence along the first direction. A layer of battery pack 91 is arranged between two adjacent heat exchange parts 40, and a layer of battery pack 91 is arranged above the uppermost heat exchange part 40. The heat exchange part 40 exchanges heat with the adjacent battery pack 91 above. The communication mechanism 50 is fixed to the installation side wall 23, and the communication mechanism 50 is communicated with a plurality of heat exchange parts 40, so that the heat exchange medium flows into the plurality of heat exchange parts 40 through the communication mechanism 50 and the heat exchange medium in the plurality of heat exchange parts 40 flows out through the communication mechanism 50. At least part of the communication mechanism 50 is assembled in the assembly space 231.

[0211] The box body 20 includes a box body 21, a box cover 22 and a mounting side plate 30. In the first direction, the box cover 22 and the mounting side plate 30 are located on the same side of the box body 21. The box body 21, the box cover 22 and the mounting side plate 30 jointly define a mounting cavity for mounting multiple battery cells 10. In the second direction, the mounting side plate 30 is located on one side of the mounting cavity. Part of the structure of the connecting mechanism 50 is located on the side of the mounting side plate 30 away from the mounting cavity. The connecting mechanism 50 includes two connecting joints 51, one connecting joint 51 is configured as a medium inflow joint 52, and the other connecting joint 51 is configured as a medium outflow joint 53. Each connecting joint 51 has a first interface 511 and two second interfaces 512. The first interface 511 of the medium inflow joint 52 is connected to the outlet of the medium source, and the first interface 511 of the medium outflow joint 53 is connected to the inlet of the medium source. At least part of the connecting structure 80 is arranged in the assembly space 231. There are two connecting structures 80, and the two connecting structures 80 and the two connecting joints 51 are connected one by one. The connecting structure 80 includes a first connecting pipe 81 and a second connecting pipe 82. A second interface 512 of the medium inflow joint 52 is connected to the first heat exchange part 41 through the first connecting pipe 81, and another second interface 512 of the medium inflow joint 52 is connected to the second heat exchange part 42 through the second connecting pipe 82. A second interface 512 of the medium outflow joint 53 is connected to the first heat exchange part 41 through the first connecting pipe 81, and another second interface 512 of the medium outflow joint 53 is connected to the second heat exchange part 42 through the second connecting pipe 82. The battery device 100 also includes: an electrical connection mechanism 90, which is fixed to the mounting side plate 30, and the electrical connection mechanism 90 is located on the side of the mounting side plate 30 away from the mounting cavity.

[0212] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0213] Other components of the battery device 100 according to the embodiment of the present application, such as the bus bar and the explosion-proof valve, and operations are known to those skilled in the art and will not be described in detail here.

[0214] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0215] Although embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that: include: A multi-layer battery pack, each layer of the battery pack includes a plurality of battery cells arranged on a first plane, and the multi-layer battery packs are arranged in sequence along a first direction, and the first direction intersects the first plane; A box body, the box body defining a mounting cavity for mounting multiple layers of the battery pack, the box body having a mounting side wall, the mounting side wall being located at one side of the mounting cavity along a second direction, the mounting side wall forming an assembly space open toward the mounting cavity, the first direction and the second direction intersecting; A plurality of heat exchange parts, wherein the plurality of heat exchange parts are disposed in the installation cavity and arranged in sequence along the first direction, and each of the heat exchange parts exchanges heat with at least one of the battery packs; A connecting mechanism is fixed to the installation side wall, and the connecting mechanism is connected with the multiple heat exchange parts, so that the heat exchange medium flows into the multiple heat exchange parts through the connecting mechanism and the heat exchange medium in the multiple heat exchange parts flows out through the connecting mechanism, and at least a part of the connecting mechanism is assembled in the assembly space.

2. The battery device according to claim 1, characterized in that: The box body includes a box body, a box cover and an installation side plate, the box body, the box cover and the installation side plate jointly define the installation cavity, along the first direction, the box cover and the installation side plate are located on the same side of the box body, the box body has a first side wall opposite to the installation side plate along the first direction, the first side wall and the installation side plate are connected to form the installation side wall, the first side wall defines the assembly space, and part of the connecting mechanism is arranged on the installation side plate.

3. The battery device according to claim 2, characterized in that: The portion of the communication mechanism is located at a side of the installation side plate away from the installation cavity.

4. The battery device according to claim 2, characterized in that: The connecting mechanism includes: a plurality of connecting joints, wherein the plurality of connecting joints are arranged on a side of the mounting side plate away from the mounting cavity, a portion of the plurality of connecting joints are configured as medium inflow joints, and another portion of the plurality of connecting joints are configured as medium outflow joints, each of the medium inflow joints is connected to the plurality of heat exchange parts so that the heat exchange medium flows into the plurality of heat exchange parts, and each of the medium outflow joints is connected to the plurality of heat exchange parts so that the heat exchange medium in the plurality of heat exchange parts flows out.

5. The battery device according to claim 4, characterized in that: The plurality of connecting joints are arranged in sequence along a third direction, and the first direction intersects with both the second direction and the third direction.

6. The battery device according to claim 5, characterized in that: Each of the connecting joints has a first interface. The first interface of the medium inlet joint is a medium inlet, and the first interface of the medium outlet joint is a medium outlet. The direction of the medium inlet is consistent with the direction of the medium outlet.

7. The battery device according to claim 6, characterized in that: The medium inlet and the medium outlet are arranged along the third direction.

8. The battery device according to claim 6, characterized in that: The mounting side plate includes: a first plate body and a second plate body. Along the first direction, the first plate body is located on the side of the second plate body away from the box body. The first plate body and the second plate body are bent and connected to form an installation space on the side of the first plate body away from the mounting cavity. At least a portion of each of the connecting joints is located in the installation space.

9. The battery device according to claim 8, characterized in that: Each of the connecting joints has a second interface, the second interface is in communication with the first interface of the corresponding connecting joint, and the second interface is used to communicate with the corresponding heat exchange part.

10. The battery device according to claim 9, characterized in that: Each of the connecting joints has a plurality of the second interfaces, and the plurality of the second interfaces are connected to the plurality of the heat exchange parts in a one-to-one correspondence.

11. The battery device according to claim 10, characterized in that: The mounting side plate is formed with a plurality of avoidance structures, and the plurality of avoidance structures correspond one-to-one to the plurality of connecting joints. Each of the avoidance structures includes a avoidance hole connected to the mounting cavity, and the plurality of the second interfaces of the connecting joint correspond to the avoidance holes of the corresponding avoidance structures.

12. The battery device according to claim 11, characterized in that: Each of the avoidance structures comprises a plurality of the avoidance holes, and the plurality of the second interfaces of the connecting joint correspond one-to-one to the plurality of the avoidance holes of the corresponding avoidance structure.

13. The battery device according to claim 12, characterized in that: Each of the avoidance structures comprises two avoidance holes, the two avoidance holes are respectively a first avoidance hole and a second avoidance hole, the first plate body is formed with the first avoidance hole, and the second plate body is formed with the second avoidance hole; Each of the connecting joints has two second interfaces. A second interface is formed on the side of the connecting joint facing the first plate body and the side facing the second plate body respectively. The two second interfaces correspond to the corresponding first avoidance holes and the second avoidance holes respectively.

14. The battery device according to claim 13, characterized in that: A first connecting column is formed on a side of each of the connecting joints facing the second plate body, the first connecting column is formed with the second interface, and the first connecting column is penetrated through the second avoidance hole.

15. The battery device according to claim 13, characterized in that: The communication mechanism further includes: a plurality of communication structures, at least part of which is disposed in the assembly space, the plurality of communication structures corresponds to the plurality of communication joints one by one, and the communication structures communicate with the corresponding communication joints and the plurality of heat exchange parts.

16. The battery device according to claim 15, characterized in that: The multiple heat exchange parts include: a first heat exchange part and a second heat exchange part. Along the first direction, the first heat exchange part is located between the box cover and the second heat exchange part. The connecting structure includes a first connecting pipe and a second connecting pipe. The first connecting pipe connects the first heat exchange part and the second interface of the corresponding connecting joint facing the first plate body. The second connecting pipe connects the second heat exchange part and the second interface of the corresponding connecting joint facing the second plate body. The second connecting pipe is arranged in the assembly space.

17. The battery device according to claim 16, characterized in that: The first side wall includes a side wall body, and the side wall body and the mounting side plate are arranged and connected along the first direction. Along the second direction, the assembly space is located between the mounting cavity and the side wall body. The second connecting tube extends along the first direction. An avoidance groove is formed on the inner surface of the side wall body, and at least a portion of the second connecting tube is located in the avoidance groove.

18. The battery device according to claim 17, characterized in that: The first side wall also includes a mounting boss, and the mounting boss is formed on the inner surface of the side wall body close to the mounting cavity, so that the side wall body and the mounting boss jointly define the assembly space, and the mounting boss is formed with a mounting hole, and the mounting hole passes through the mounting boss along the first direction. Along the first direction, the mounting boss and the second plate body are opposite, and the assembly space is located between the mounting boss and the second plate body, and the second heat exchange part is located on the side of the mounting boss away from the box cover, and the second heat exchange part has a second connecting column protruding toward the mounting boss, and the second connecting column is passed through the mounting hole, and the second connecting pipe is connected to the second connecting column so that the second connecting pipe and the second heat exchange part are connected.

19. The battery device according to claim 16, characterized in that: The connecting joint is formed with a mounting portion, the mounting portion is formed with a first mounting hole, the first connecting pipe is formed with a mounting flange, the mounting flange is formed with a second mounting hole, and a fastener is passed through the second mounting hole and assembled to the first mounting hole so that the first connecting pipe is fixed to the mounting portion.

20. The battery device according to claim 19, characterized in that There are a plurality of the mounting portions, and the plurality of the mounting portions are arranged around the second interfaces on corresponding sides of the connecting joint.

21. The battery device according to any one of claims 2 to 20, characterized in that: The mounting side plate is sandwiched between the box cover and the box body, and the mounting side plate is fixed to at least one of the box body and the box cover.

22. The battery device according to claim 21, characterized in that The box cover has a second side wall, the first side wall, the mounting side plate and the second side wall are arranged along the first direction, and the mounting side plate is sandwiched between the first side wall and the second side wall.

23. The battery device according to claim 22, characterized in that The second side wall is formed with a first assembly notch, at least a portion of the mounting side plate is adapted to the shape of the first assembly notch, and the mounting side plate is mounted in the first assembly notch.

24. The battery device according to claim 23, characterized in that The second side wall has an installation flange, and the installation flange is arranged along the edge of the first assembly notch. The end surface of the installation side plate facing the second side wall has an installation structure, and the installation structure is opposite to the installation flange and fixed to the installation flange.

25. The battery device according to claim 24, characterized in that The shapes of the mounting flange and the mounting structure are adapted to each other.

26. The battery device according to claim 22, characterized in that The box body also has two third side walls, the two third side walls are spaced apart along the third direction, the first side wall is located between the two third side walls, and along the first direction, the third side wall has a protrusion protruding from the first side wall toward the box cover, and a second assembly notch is formed at the inner corner of the protrusion, part of the mounting side plate is located between the two third side walls, and the mounting side plate is assembled in the second assembly notch so that the third side wall limits the mounting side plate from moving toward the mounting cavity along the second direction.

27. The battery device according to any one of claims 1 to 20, characterized in that: The heat exchange parts are all configured as heat exchange plates.

28. The battery device according to any one of claims 2 to 20, characterized in that: The battery device further includes: an electrical connection mechanism, which is fixed to the mounting side plate and is located on a side of the mounting side plate away from the mounting cavity.

29. An electrical device, characterized in that: Comprising a battery device according to any one of claims 1-28.

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