Battery device and electric device

Abstract

The utility model discloses a kind of battery device and electric device, it is related to battery technical field, wherein, battery device includes box, multiple groups of battery monomer components, heat exchange components and reinforcing beam;Box is formed with containing cavity;Multiple groups of battery monomer components are spaced apart in containing cavity along first direction, and battery monomer component includes at least one battery monomer;Heat exchange component is located in containing cavity, and heat exchange component includes multiple heat exchange structures, and heat exchange structure is equipped with heat exchange medium flow channel, heat exchange structure is located between two groups of battery monomer components, or is located in multiple groups of battery monomer components in at least one side in first direction;Reinforcing beam is spaced apart in containing cavity, and its two ends are respectively connected with the inside wall of box, and reinforcing beam is equipped with flow guide passage;Heat exchange medium flow channel of two adjacent heat exchange structures is interconnected, and flow guide passage and heat exchange medium flow channel of heat exchange structure adjacent thereto are communicated.The technical scheme of the application can take into account the structural reinforcement requirement and heat management requirement of battery device.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] Regarding battery pack structure, to meet the strength requirements for side-impact collisions, crossbeams are typically added inside the battery pack to improve overall rigidity. Simultaneously, to ensure individual battery cells operate at suitable temperatures, heat exchange devices are also required within the battery pack for cooling or cryogenic heating. These heat exchange devices often have connecting pipes for transporting the heat exchange medium, and the routing of these pipes within the battery pack inevitably conflicts with the crossbeams. In related technologies, the ends of the crossbeams are usually cut to avoid the connecting pipes, but this method reduces the strength of the crossbeams, making it difficult to meet the structural strength design requirements of the battery pack. Utility Model Content

[0004] The main purpose of this utility model is to propose a battery device and an electrical device that takes into account both the structural reinforcement requirements and thermal management requirements of the battery device.

[0005] To achieve the above objectives, the battery device proposed in this utility model includes: The box-shaped structure forms a receiving cavity; Multiple sets of battery cell assemblies are spaced apart in the receiving cavity along a first direction, and each battery cell assembly includes at least one battery cell. A heat exchange assembly is disposed in the receiving cavity. The heat exchange assembly includes multiple heat exchange structures, which are arranged along a first direction. Each heat exchange structure is provided with a heat exchange medium flow channel. The heat exchange structure is disposed between two adjacent sets of battery cell assemblies, or on at least one side of the multiple sets of battery cell assemblies in the first direction. A reinforcing beam is disposed in the receiving cavity. The reinforcing beam extends along the second direction, and both ends of the reinforcing beam are respectively connected to the inner sidewall of the box. At least one end of the reinforcing beam is provided with a flow guiding channel. The first direction intersects the second direction. The heat exchange medium channels of two adjacent heat exchange structures are interconnected, and the flow guide channel is connected to the heat exchange medium channel of the adjacent heat exchange structure.

[0006] The technical solution of this application sets a flow channel at the end of the reinforcing beam and connects the reinforcing beam with the heat exchange structure so that the flow channel is connected with the heat exchange medium flow channel of the heat exchange structure. This eliminates the need to cut and slot the reinforcing beam to avoid the heat exchange structure and provides a flow path for the circulation of the heat exchange medium, thus taking into account both the structural strength and thermal management requirements of the battery pack.

[0007] According to some embodiments of this application, a first joint is provided on the side of the heat exchange structure adjacent to the reinforcing beam facing the reinforcing beam; The reinforcing beam includes a second joint, in which a portion of the flow channel is provided. The first joint and the second joint are plugged into each other and communicate with each other.

[0008] By adopting the above method, the heat exchange structure and the reinforcing beam are connected to each other through the insertion and mating of the first joint and the second joint. The connection between the heat exchange structure and the reinforcing beam does not require the use of additional transfer pipes, which reduces the number of components in the battery device, simplifies the assembly operation, and improves the sealing reliability of the connection.

[0009] According to some embodiments of this application, the second connector includes a connector body and a convex ring. The connector body has a portion of the flow guiding channel, and the convex ring protrudes from the outer wall of the end of the connector body and surrounds the connector body. The second connector is inserted into the first connector, and the convex ring abuts against the inner wall of the first connector.

[0010] Using the above method, the main body of the connector is inserted into the first connector to connect the first connector with the flow channel. The convex ring abuts against the inner wall of the first connector to form a radial sealing interface, improving the sealing performance between the first connector and the second connector and reducing the risk of heat exchange medium leakage.

[0011] According to some embodiments of this application, the reinforcing beam is recessed with a relief groove on the side facing the heat exchange structure, the second joint is located in the relief groove, and the first joint abuts against the bottom wall of the relief groove.

[0012] Using the above method, after the first and second joints are inserted, the end of the first joint abuts against the bottom wall of the clearance groove to achieve axial restraint, thereby improving the relative positional stability between the heat exchange structure and the reinforcing beam. Furthermore, the clearance groove allows part of the first joint structure to extend into it, reducing the total length in the first direction after the heat exchange structure and reinforcing beam are connected, making the overall structure more compact.

[0013] According to some embodiments of this application, the reinforcing beam is disposed between two adjacent sets of battery cell modules, and the heat exchange structure is respectively provided on both sides of the reinforcing beam along the first direction. The two ends of the flow channel are respectively connected to the heat exchange structure on both sides.

[0014] By adopting the above method, the flow channel in the reinforcing beam connects the heat exchange medium flow channels of two adjacent heat exchange structures, reducing the number of connecting pipes between two adjacent heat exchange structures. This eliminates the need to cut the reinforcing beam to avoid obstacles and also reduces the number of components in the battery device.

[0015] According to some embodiments of this application, the liquid inlet and liquid outlet of the heat exchange structure are located at one end of the heat exchange structure along the second direction and arranged along the third direction; The reinforcing beam includes two flow channels arranged along the third direction, which are respectively connected to the inlet and the outlet, and the third direction is the depth direction of the receiving cavity.

[0016] Using the above method, the two guide channels serve as the liquid inlet and outlet channels, respectively, connecting to the liquid inlet and outlet of the heat exchange medium flow channel, simplifying the internal piping layout of the battery pack. Furthermore, this arrangement places the liquid inlet and outlet channels on the same side of the housing cavity and along its depth, resulting in a compact internal layout. This avoids occupying excessive space in the housing cavity in the second direction, allowing more space to be used to accommodate more battery cells or increase their size, thus improving the energy density of the battery device. Additionally, placing the liquid inlet and outlet channels on the same side facilitates unified connection of external liquid cooling piping.

[0017] According to some embodiments of this application, the reinforcing beam includes a beam body and a connecting section connected together, the beam body extends along the second direction, and the connecting section is located at the end of the beam body and connected to the inner sidewall of the box body; The width of the connecting segment gradually increases in the direction away from the beam.

[0018] By adopting the above method, the gradually widening structure of the connecting section increases the contact area with the side wall of the enclosure, which helps to distribute the impact load more evenly and reduce local stress concentration. The gradual widening of the connecting section at the end of the reinforcing beam also eliminates the need to increase the width of the entire reinforcing beam or the spacing between the battery cells on both sides of the reinforcing beam, thus achieving a compact overall structure while meeting structural strength requirements.

[0019] According to some embodiments of this application, the reinforcing beam is an integral structure.

[0020] By adopting the above method, the welding or bolting connection process required for the split structure is eliminated, reducing the assembly steps. The integrated structure eliminates the connection interface between the components, and there are no seams or gaps in the collision load transmission path. This facilitates the continuous transmission of impact force along the reinforcing beam, reduces the risk of cracking or loosening at the connection, and improves the overall structural strength and impact resistance of the reinforcing beam.

[0021] According to some embodiments of this application, the heat exchange assembly further includes a connecting pipe, through which the heat exchange medium channels of two adjacent heat exchange structures are connected.

[0022] Using the above method, the connecting pipe is used as an independent connecting element. The length of the connecting pipe can be adjusted accordingly to adapt to the connection between heat exchange structures with different intervals, reducing the requirements for the end docking accuracy of the heat exchange structure and improving applicability and connection reliability.

[0023] According to some embodiments of this application, the heat exchange structure includes a heat exchange body and a current collector. The heat exchange body extends along the second direction and contacts the battery cell assembly. The heat exchange body is provided with the heat exchange medium channel. The current collector is located at the end of the heat exchange body along the second direction and communicates with the heat exchange medium channel. The current collector is communicated with the flow guide channel or another heat exchange structure.

[0024] Using the above method, the collector is located at the end of the heat exchange body along the second direction for collecting liquid. The collector is connected to each heat exchange medium channel in the heat exchange body. The inlet and outlet ends of each heat exchange medium channel are connected to the chamber of the collector. The heat exchange medium is divided or merged in the chamber of the collector. That is, the internal chamber of the collector gathers multiple parallel heat exchange medium channels in the heat exchange body into one place, so that the heat exchange medium is simultaneously divided to each heat exchange medium channel or returned from each heat exchange medium channel to the collector through the collector, which reduces the assembly difficulty between the heat exchange structure and the connecting pipe.

[0025] According to some embodiments of this application, the battery cell has two first surfaces disposed opposite to each other along the first direction and two second surfaces disposed opposite to each other along the second direction, the area of ​​the first surface is larger than the area of ​​the second surface, and the heat exchange structure is in contact with the first surface.

[0026] By adopting the above method, the heat exchange structure comes into contact with the first surface with a larger area, which increases the heat exchange area between the heat exchange structure and the battery cell, and helps to improve the heat exchange efficiency.

[0027] This application also proposes an electrical device, including a battery device as described in any of the foregoing embodiments.

[0028] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 Here are structural diagrams of a vehicle provided according to some embodiments of this application; Figure 2 This is an exploded view of a battery device provided according to some embodiments of this application; Figure 3 This is a structural diagram of the housing, heat exchange assembly, and reinforcing beam in a battery device according to some embodiments of this application; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a structural diagram of a reinforcing beam in a battery device provided according to some embodiments of this application; Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0031] Explanation of icon numbers: 100. Battery assembly; 10. Housing; 11. First part; 12. Second part; 13. Receiving cavity; 20. Battery cell; 30. Heat exchange assembly; 31. Heat exchange structure; 311. Heat exchange body; 312. Current collector; 3121. First connector; 32. Connecting pipe; 40. Reinforcing beam; 41. Second connector; 411. Connector body; 412. Protruding ring; 42. Beam; 43. Connecting section; 44. Flow guide channel; 45. Clearance groove; 1000, vehicle; 200, controller; 300, motor; X, first direction; Y, second direction; Z, third direction.

[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0034] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0035] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0036] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0037] Regarding battery pack structure, to meet the strength requirements for side-impact collisions, crossbeams are typically added inside the battery pack to improve overall rigidity. Simultaneously, to ensure individual battery cells operate at suitable temperatures, heat exchange devices are also required within the battery pack for cooling or cryogenic heating. These heat exchange devices often have connecting pipes for transporting the heat exchange medium, and the routing of these pipes within the battery pack inevitably conflicts with the crossbeams. In related technologies, the ends of the crossbeams are usually cut to avoid the connecting pipes, but this method reduces the strength of the crossbeams, making it difficult to meet the structural strength design requirements of the battery pack.

[0038] Based on the above considerations, this application proposes a battery device, which includes a housing, multiple sets of battery cell assemblies, a heat exchange assembly, and a reinforcing beam; the housing forms a receiving cavity; multiple sets of battery cell assemblies are spaced apart in the receiving cavity along a first direction, and each battery cell assembly includes at least one battery cell; the heat exchange assembly is disposed in the receiving cavity, and the heat exchange assembly includes multiple heat exchange structures, each heat exchange structure having a heat exchange medium flow channel, the multiple heat exchange structures being arranged along the first direction, and the heat exchange structures being disposed between two adjacent sets of battery cell assemblies, or on at least one side of the multiple sets of battery cell assemblies in the first direction; the reinforcing beam is spaced apart in the receiving cavity, the reinforcing beam extending along a second direction, both ends of the reinforcing beam being connected to the inner sidewall of the housing, and at least one end of the reinforcing beam having a flow guide channel, the first direction intersecting the second direction; the heat exchange medium flow channels of two adjacent heat exchange structures are interconnected, and the flow guide channel is connected to the heat exchange medium flow channel of the adjacent heat exchange structure.

[0039] In other words, by setting a flow channel at the end of the reinforcing beam, and connecting the flow channel with the connecting pipe of the heat exchange component, there is no need to cut or slot the reinforcing beam to avoid the heat exchange component, and a flow path is provided for the circulation of the heat exchange medium. This takes into account both the structural strength requirements and thermal management requirements of the battery device, enabling the battery device to have good resistance to side column collisions and to better regulate and control the temperature of the battery device.

[0040] The battery device in this application can serve as a power source or power system for an electrical device. The battery device refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. This is beneficial for improving the overall performance of the battery device and facilitating its promotion.

[0041] The aforementioned electrical devices may include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, rail trains, ships, spacecraft, etc. Among them, electric toys may include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0042] For ease of explanation, the following embodiments will be described using a vehicle or rail train as an example of an electrical device according to an embodiment of this application.

[0043] Please refer to Figure 1 , Figure 1 This is a structural schematic diagram of a vehicle 1000 provided in some embodiments of this application.

[0044] Vehicle 1000 can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is installed inside vehicle 1000, which can be located at the bottom, front, or rear of vehicle 1000. The battery device 100 can be used to power vehicle 1000; for example, it can serve as the operating power source for vehicle 1000. Vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 controls the battery device 100 to supply power to the motor 300, for example, to meet the power needs of vehicle 1000 during starting, navigation, and driving. In some embodiments of this application, the battery device 100 can also serve as the driving power source for vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power, and can also be used to power electrical appliances on vehicle 1000.

[0045] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and a battery cell 20, with the battery cell 20 housed within the housing 10. The housing 10 provides a space for accommodating the battery cell 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, which overlap each other, jointly defining a space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one open end, and the first portion 11 may be a plate-like structure, covering the open side of the second portion 12 so that the first portion 11 and the second portion 12 jointly define the space; alternatively, the first portion 11 and the second portion 12 may both be hollow structures with one open side, with the open side of the first portion 11 covering the open side of the second portion 12. Of course, the housing 10 formed by the first portion 11 and the second portion 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0046] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells 20, which are connected in series, parallel, or mixed connections via busbars.

[0047] In some embodiments, the battery cell assembly is typically formed by arranging a plurality of battery cells 20.

[0048] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 20 together to form an independent module. As an example, a battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0049] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 10 and one or more sets of battery cell assemblies housed within the housing 10. As an example, the battery cell assembly may be a battery module, which can be housed within the housing 10 by securing the battery module to the housing 10. Alternatively, the battery cell assembly may be housed within the housing 10 by directly securing multiple battery cells 20 to the housing 10.

[0050] The battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0051] According to some embodiments of this application, please refer to Figures 3 to 6 , Figure 3 This is a schematic diagram of the structure of the battery device 100 provided according to some embodiments of this application. Figure 4 for Figure 3 Enlarged view of the structure of the battery device 100 at the joint position between the reinforcing beam 40 and the connecting pipe 32. Figure 5 This is a structural schematic diagram of the reinforcing beam 40 according to some embodiments of this application. Figure 6 for Figure 5 Enlarged view of the structure of the central reinforcing beam 40 at the end with the flow guiding channel 44.

[0052] This application provides a battery device 100, which includes a housing 10, multiple sets of battery cell assemblies, a heat exchange assembly 30, and a reinforcing beam 40. The housing 10 forms a receiving cavity 13. Multiple sets of battery cell assemblies are spaced apart along a first direction X in the receiving cavity 13, and each battery cell assembly includes at least one battery cell 20. The heat exchange assembly 30 is disposed in the receiving cavity 13 and includes multiple heat exchange structures 31. Each heat exchange structure 31 has a heat exchange medium flow channel, and the multiple heat exchange structures 31 are arranged along the first direction X. The heat exchange structure 31 is disposed between two adjacent sets of battery cell modules or on at least one side of multiple sets of battery cell modules in the first direction X; the reinforcing beam 40 is disposed in the receiving cavity 13 and extends along the second direction Y. The two ends of the reinforcing beam 40 are respectively connected to the inner sidewall of the box 10. At least one end of the reinforcing beam 40 is provided with a flow guide channel 44, and the first direction X and the second direction Y intersect; the heat exchange medium flow channels of two adjacent heat exchange structures 31 are interconnected, and the flow guide channel 44 is connected to the heat exchange medium flow channel of the adjacent heat exchange structure 31.

[0053] As shown in the figure, the first direction X is the arrangement direction of multiple sets of battery cell modules in the battery device 100, which is usually the length direction of the battery device 100; the second direction Y is the arrangement direction of the battery cells 20 in a single set of battery cell modules, which is usually the width direction of the battery device 100; and the third direction Z is the thickness direction of the battery device 100. It should be noted that the first direction X can also be the width direction of the battery device 100, and the second direction Y can be the length direction of the battery device 100.

[0054] The heat exchange component 30 serves as a thermal management component of the battery device 100. It includes a plurality of heat exchange structures 31 arranged along the first direction X. The heat exchange structures 31 are in contact with the battery cell assembly to transfer heat. The heat exchange structures 31 are provided with heat exchange medium channels. The heat exchange medium exchanges heat with the channel wall during the flow of the medium in the channel, thereby regulating the temperature of the battery cell 20.

[0055] The heat exchange structure 31 can be configured as a plate-like structure, such as a harmonica tube. Multiple parallel and independent heat exchange medium channels are arranged inside the harmonica tube along its length. The plate-like shape allows for a larger contact area between the heat exchange structure 31 and the battery cell 20, improving heat exchange efficiency. In other embodiments, the heat exchange structure 31 can also be configured as a serpentine tube structure, consisting of a circular or flat metal tube bent into a serpentine shape, with the outer wall of the tube contacting the surface of the battery pack, and the interior of the tube serving as a heat exchange medium channel. Additionally, the heat exchange structure 31 can also be configured in other regular or irregular shapes.

[0056] Multiple heat exchange structures 31 are provided. Each heat exchange structure 31 can be positioned between two adjacent sets of battery cell modules, allowing it to contact the battery cell modules on both sides. Alternatively, the heat exchange structure 31 can be positioned on the side of the outermost battery cell module facing away from the other battery cell modules along the first direction X, so that the heat exchange structure 31 only contacts the outermost battery cell module. In some embodiments, two adjacent heat exchange structures 31 can be directly connected to allow the heat exchange medium channels to communicate with each other, or a connecting pipe 32 can be provided between two adjacent heat exchange structures 31 to connect the two heat exchange medium channels.

[0057] In this embodiment, the battery device 100 further includes at least one reinforcing beam 40 disposed in the receiving cavity 13. The reinforcing beam 40 extends along the second direction Y, and its two ends along the second direction Y are respectively connected to the two side walls of the housing 10 to form lateral support, thereby improving the structural rigidity of the housing 10 in the second direction Y. The reinforcing beam 40 can be disposed between two adjacent sets of battery cell modules, or it can be disposed on one side of multiple sets of battery cell modules along the first direction X.

[0058] At least one end of the reinforcing beam 40 is provided with a flow guiding channel 44, which is connected to the heat exchange medium flow channel in the adjacent heat exchange structure 31. The heat exchange medium can flow from one side of the heat exchange structure 31 to the other side of the heat exchange structure 31 through the flow guiding channel 44 in the reinforcing beam 40. Alternatively, the flow guiding channel 44 can also serve as a communication channel between the heat exchange component 30 and the external flow path.

[0059] With this configuration, by setting a flow channel 44 at the end of the reinforcing beam 40 and connecting the reinforcing beam 40 to the heat exchange structure 31, the flow channel 44 is connected to the heat exchange medium flow channel of the heat exchange structure 31. This eliminates the need to cut and slot the reinforcing beam 40 to avoid the heat exchange structure 31, while providing a flow path for the circulation of the heat exchange medium, thus taking into account both the structural strength and thermal management requirements of the battery pack.

[0060] Combined with reference Figures 4 to 6 According to some embodiments of this application, a first connector 3121 is provided on the side of the heat exchange structure 31 adjacent to the reinforcing beam 40 facing the reinforcing beam 40; the reinforcing beam 40 includes a second connector 41, and a partial flow channel 44 is provided in the second connector 41. The first connector 3121 and the second connector 41 are plugged into each other and communicate with each other.

[0061] In this embodiment, a first connector 3121 is provided on the side of the heat exchange structure 31 facing the reinforcing beam 40, and a corresponding second connector 41 is provided on the reinforcing beam 40. The second connector 41 has a partial flow guiding channel 44. The first connector 3121 and the second connector 41 are connected by a plug-in fit, so that the heat exchange medium flow channel in the heat exchange structure 31 is directly connected to the flow guiding channel 44 in the reinforcing beam 40, without the need for an additional independent connecting pipe 32 between the two. This connection method allows the heat exchange structure 31 and the reinforcing beam 40 to complete mechanical positioning and flow path docking simultaneously during assembly, reducing assembly steps, and the plug-in fit improves the sealing reliability of the connection.

[0062] After the first connector 3121 and the second connector 41 are plugged in, the heat exchange medium enters the first connector 3121 through the guide channel 44 via the second connector 41, and then flows into the heat exchange medium flow channel of the heat exchange structure 31, or flows in the reverse direction. The plug-in mating method shortens the flow path of the heat exchange medium between the heat exchange structure 31 and the reinforcing beam 40, reduces the number of pipe interfaces, and lowers the risk of leakage.

[0063] In some embodiments, the reinforcing beam 40 is located in the area between two adjacent heat exchange structures 31. In this case, second joints 41 can be provided on both sides of the reinforcing beam 40 along the first direction X so that the reinforcing beam 40 can be connected to the heat exchange structures 31 on both sides.

[0064] In one embodiment, a sealing element is provided between the first connector 3121 and the second connector 41. The sealing element is pressed against the mating interface between the two to improve the sealing performance and reduce the risk of heat exchange medium leakage.

[0065] Please refer to Figure 6 According to some embodiments of this application, the second connector 41 includes a connector body 411 and a protruding ring 412. The connector body 411 is provided with a partial flow channel 44. The protruding ring 412 protrudes from the outer wall of the end of the connector body 411 and surrounds the connector body 411. The second connector 41 is inserted into the first connector 3121, and the protruding ring 412 abuts against the inner wall of the first connector 3121.

[0066] In this embodiment, the second connector 41 is inserted into the first connector 3121, and the convex ring 412 forms a tight fit with the inner wall of the first connector 3121. The outer diameter of the convex ring 412 is slightly larger than the inner diameter of the first connector 3121. During assembly, the convex ring 412 is radially compressed by the inner wall of the first connector 3121, and extrusion occurs between the convex ring 412 and the inner wall, forming a sealing interface between them. This improves the sealing performance between the first connector 3121 and the second connector 41 and reduces the risk of leakage of the heat exchange medium along the gap between the outer wall of the second connector 41 and the inner wall of the first connector 3121. The tight fit also fixes the first connector 3121 and the second connector 41 radially, and they can maintain the insertion state without additional snaps or locking structures, reducing the number of parts.

[0067] Please refer to Figure 6 According to some embodiments of this application, the side of the reinforcing beam 40 facing the heat exchange structure 31 is recessed with a relief groove 45, the second joint 41 is located in the relief groove 45, and the first joint 3121 abuts against the bottom wall of the relief groove 45.

[0068] In this embodiment, the reinforcing beam 40 has a recessed clearance groove 45 along its side in the first direction X, and the second connector 41 is located in the clearance groove 45. When the first connector 3121 and the second connector 41 are inserted into each other, the end of the first connector 3121 extends into the clearance groove 45, and the end face of the first connector 3121 abuts against the bottom wall of the clearance groove 45 to achieve axial limiting, thereby improving the relative positional stability between the heat exchange structure 31 and the reinforcing beam 40. Furthermore, by providing the clearance groove 45, a portion of the structure of the first connector 3121 can extend into the clearance groove 45, reducing the total length along the first direction X after the heat exchange structure 31 and the reinforcing beam 40 are connected, making the overall structure more compact.

[0069] In some embodiments, to increase the structural strength of the reinforcing beam 40, the width of the end of the reinforcing beam 40 is gradually widened in the direction away from the beam body 42. In this case, the sidewall of the reinforcing beam 40 facing the heat exchange structure 31 is at least partially set as a slope or arc surface due to the gradual widening of the width. The setting of the clearance groove 45 allows an independent flat wall to be formed at the bottom of the groove even when the width of the end of the reinforcing beam 40 is gradually widened and the sidewall is a slope or arc surface, so that the end face of the first joint 3121 can obtain a planar contact condition, which is beneficial to improving the sealing performance.

[0070] Please refer to Figure 4 According to some embodiments of this application, the reinforcing beam 40 is disposed between two adjacent sets of battery cell modules, and the reinforcing beam 40 is provided with heat exchange structures 31 on both sides along the first direction X, and the two ends of the flow channel 44 are respectively connected to the heat exchange structures 31 on both sides.

[0071] In this embodiment, the reinforcing beam 40 can be disposed in the central region of the receiving cavity 13, positioned between two adjacent sets of battery cell modules, to support the central region of the side wall of the housing 10, thereby improving the structural strength and impact resistance of the housing 10. Simultaneously, heat exchange structures 31 are respectively provided on both sides of the reinforcing beam 40. This allows at least one set of battery cell modules to be disposed between the reinforcing beam 40 and the heat exchange structure 31, or allows the reinforcing beam 40 to contact the heat exchange structure 31. The heat exchange structures 31 on both sides of the reinforcing beam 40 are connected through a flow channel 44, allowing the heat exchange medium to flow from one side of the heat exchange structure 31 to the other side. This eliminates the need for a connecting pipe 32 at the location of the reinforcing beam 40 to connect the heat exchange structures 31 on both sides, reducing the number of components in the battery device 100 and simplifying the piping layout.

[0072] Please refer to Figure 5 and Figure 6 According to some embodiments of this application, the inlet and outlet of the heat exchange structure 31 are located at one end of the heat exchange structure 31 along the second direction Y and arranged along the third direction Z. The reinforcing beam 40 includes two flow channels 44 arranged along the third direction Z. The two flow channels 44 are respectively connected to the inlet and outlet. The third direction Z is the depth direction of the accommodating cavity 13.

[0073] In this embodiment, the inlet and outlet of the heat exchange structure 31 are centrally located at the same end of the heat exchange structure 31. Correspondingly, two flow guiding channels 44 are provided on the reinforcing beam 40, which serve as the inlet and outlet channels, respectively, and are connected to the inlet and outlet of the heat exchange medium flow channel. This arrangement allows the inlet and outlet pipes of the heat exchange medium to be arranged on the same side of the receiving cavity 13, and the docking interfaces of the external pipes are centralized, reducing the space occupied in the second direction Y caused by the pipes being dispersed on both sides of the receiving cavity 13.

[0074] The inlet and outlet are arranged along the depth direction of the receiving cavity 13, i.e., the third direction Z in the figure, which is also the thickness direction of the battery device 100. The two guide channels 44 are arranged vertically along the depth direction of the receiving cavity 13, corresponding to the vertical positions of the inlet and outlet of the heat exchange structure 31. This results in a smaller span of the connecting pipe 32 or the connector in the depth direction and a more regular pipeline route. It also reduces the space occupied in the second direction Y, making the internal layout compact. It does not require occupying too much space in the receiving cavity 13 in the second direction Y, so that the receiving cavity 13 can have more space to arrange more battery cells 20 or increase the size of the battery cells 20, which is beneficial to improving the energy density of the battery device 100.

[0075] Please refer to Figures 4 to 6According to some embodiments of this application, the reinforcing beam 40 includes a beam body 42 and a connecting section 43 connected together. The beam body 42 extends along a second direction Y, and the connecting section 43 is located at the end of the beam body 42 and connected to the inner sidewall of the box body 10. The width of the connecting section 43 gradually increases along the direction away from the beam body 42.

[0076] In this embodiment, the reinforcing beam 40 includes a beam body 42 and a connecting section 43 connected together. The beam body 42 extends along the second direction Y, and the connecting section 43 is located at the end of the beam body 42 and abuts against the inner wall of the box body 10. Along the direction away from the beam body 42, the width of the connecting section 43 gradually increases, with the width of the connecting section 43 near the inner wall of the box body 10 being greater than its width at the connection point with the beam body 42. This increases the contact area between the reinforcing beam 40 and the inner wall of the box body 10, which helps to disperse the impact load, reduces concentrated compression of the connecting section 43 by the side wall of the box body 10, and lowers the risk of localized stress concentration in the contact area between the connecting section 43 and the side wall of the box body 10.

[0077] The sidewall of the connecting segment 43 along the first direction X can be set as an inclined surface, a stepped surface, an arc surface, or other shapes.

[0078] In some embodiments, the sidewall of the connecting segment 43 along the first direction X is configured as a concave arc surface. The concave direction of the arc surface smoothly transitions along the width direction of the connecting segment 43, making the overall shape of the reinforcing beam 40 transition naturally, and there are no sharp corners or abrupt cross sections between the connecting segment 43 and the beam body 42. When subjected to impact loads, the smoothly transitioning concave arc surface allows the load to be continuously transmitted along the arc surface, preventing stress concentration areas due to abrupt cross sections, and reducing the risk of local cracking or plastic deformation of the connecting segment 43 under impact conditions.

[0079] Meanwhile, the concave region of the concave arc surface forms a clearance space in the width direction of the connecting section 43, causing the outer contour of the connecting section 43 to contract inward in the middle of the sidewall. This reduces the occupancy of the end of the reinforcing beam 40 on both sides of the receiving cavity 13 along the first direction X, and lowers the possibility of interference between the reinforcing beam 40 and adjacent battery cell components. In addition, the curvature of the concave arc surface changes gently, which is conducive to one-time forming by milling or casting processes, making it easy to process.

[0080] According to some embodiments of this application, the reinforcing beam 40 is an integral structure.

[0081] In this embodiment, the integrated structure eliminates the welding or bolting processes required for separate structures, reducing assembly steps and the number of parts. The flow channel 44 is formed directly inside the reinforcing beam 40, eliminating the need for butt seals between different components and reducing the risk of leakage.

[0082] Meanwhile, the integrated structure eliminates the connection interfaces between components, and there are no seams or gaps in the collision load transmission path. The impact force is continuously transmitted along beam 42, and there is no reduction in load-bearing capacity due to loosening or cracking at the connection. The reinforced beam 40 has high overall structural strength and fatigue resistance, and good structural stability.

[0083] In some implementations, the reinforcing beam 40 can be formed by extrusion molding or casting.

[0084] According to some embodiments of this application, the battery cell 20 has two first surfaces disposed opposite to each other along a first direction X and two second surfaces disposed opposite to each other along a second direction Y. The area of ​​the first surface is larger than the area of ​​the second surface, and the heat exchange structure 31 is in contact with the first surface.

[0085] In this embodiment, the first surface area of ​​the battery cell 20 is relatively large, and the heat exchange structure 31 forms a large heat exchange area after contacting it, which is conducive to the efficient transfer of heat between the battery cell 20 and the heat exchange structure 31, improving the heat exchange efficiency and helping the battery cell 20 maintain temperature consistency during charging and discharging.

[0086] When the heat exchange structure 31 is disposed between two adjacent sets of battery cell modules, its two side surfaces are in contact with the first surface of the adjacent battery cell module respectively. The same heat exchange structure 31 can simultaneously regulate the temperature of the battery cell modules on both sides, thereby reducing the number of heat exchange structures 31 arranged.

[0087] Please refer to Figure 4 According to some embodiments of this application, the heat exchange structure 31 includes a heat exchange body 311 and a current collector 312. The heat exchange body 311 extends along the second direction Y and contacts the battery cell assembly. A heat exchange medium flow channel is provided in the heat exchange body 311. The current collector 312 is located at the end of the heat exchange body 311 along the second direction Y and communicates with the heat exchange medium flow channel. The current collector 312 communicates with the flow guide channel 44 or another heat exchange structure 31.

[0088] In this embodiment, the heat exchange body 311 is provided with multiple heat exchange medium channels, each channel being arranged parallel to the width direction of the heat exchange body 311. The heat exchange medium flows within each channel and exchanges heat with the channel wall. The collector 312 is located at the end of the heat exchange body 311 along the second direction Y and is used to collect liquid. The collector 312 is connected to each heat exchange medium channel in the heat exchange body 311. The inlet and outlet ends of each heat exchange medium channel are connected to the chamber of the collector 312. The heat exchange medium is divided or merged within the chamber of the collector 312. That is, the internal chamber of the collector 312 converges multiple parallel heat exchange medium channels in the heat exchange body 311 to one place, so that the heat exchange medium is simultaneously divided into each heat exchange medium channel or returned from each heat exchange medium channel to the collector 312 via the collector 312. The collector 312 is provided with a connecting port located on the end side wall of the collector 312. The connecting port is connected to the flow guide channel 44 or another heat exchange structure 31. In some embodiments, a first connector 3121 can be provided on the collector 312 for docking with the reinforcing beam 40, or for docking with another heat exchange structure 31, or for connecting the connecting pipe 32 to connect with the reinforcing beam 40 or another heat exchange structure 31.

[0089] The arrangement of the collector 312 allows multiple heat exchange medium channels within the heat exchange body 311 to be connected to the outside through a single collector 312, eliminating the need for separate interfaces for each heat exchange medium channel. This reduces the number of interfaces, lowers the risk of leakage, and improves assembly convenience.

[0090] Please refer to Figure 3 and Figure 4 According to some embodiments of this application, the heat exchange assembly 30 further includes a connecting pipe 32, through which two adjacent heat exchange structures 31 are connected.

[0091] In this embodiment, the connecting pipe 32 serves as an independent connecting element, with its end inserted into or sleeved with the connecting port of the current collector 312. The length of the connecting pipe 32 can be adapted to the relative position and spacing between the two heat exchange structures 31. When the spacing between two adjacent heat exchange structures 31 changes due to the thickness of the battery cell assembly or the arrangement of the reinforcing beam 40, the length of the connecting pipe 32 can be adjusted accordingly to accommodate the connection between heat exchange structures 31 with different intervals, reducing the requirements for the docking accuracy of the ends of the heat exchange structures 31 and improving applicability and connection reliability.

[0092] This utility model also proposes an electrical device, which includes a battery device 100. The specific structure of the battery device 100 is as described in the above embodiments. The battery device can be, but is not limited to, devices or systems that utilize the battery device 100, such as mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, rail trains, ships, and spacecraft. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0093] Since the electrical device proposed in this application can adopt all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0094] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A battery device, characterized in that, include: The box-shaped structure forms a receiving cavity; Multiple sets of battery cell assemblies are spaced apart in the receiving cavity along a first direction, and each battery cell assembly includes at least one battery cell. A heat exchange assembly is disposed in the receiving cavity. The heat exchange assembly includes multiple heat exchange structures, which are arranged along a first direction. Each heat exchange structure is provided with a heat exchange medium flow channel. The heat exchange structure is disposed between two adjacent sets of battery cell assemblies, or on at least one side of the multiple sets of battery cell assemblies in the first direction. A reinforcing beam is disposed in the receiving cavity. The reinforcing beam extends along the second direction, and both ends of the reinforcing beam are respectively connected to the inner sidewall of the box. At least one end of the reinforcing beam is provided with a flow guiding channel. The first direction intersects the second direction. The heat exchange medium channels of two adjacent heat exchange structures are interconnected, and the flow guide channel is connected to the heat exchange medium channel of the adjacent heat exchange structure.

2. The battery device as claimed in claim 1, characterized in that, The heat exchange structure adjacent to the reinforcing beam has a first joint on the side facing the reinforcing beam; The reinforcing beam includes a second joint, in which a portion of the flow channel is provided. The first joint and the second joint are plugged into each other and communicate with each other.

3. The battery device as claimed in claim 2, characterized in that, The second connector includes a connector body and a convex ring. The connector body has a portion of the flow guiding channel. The convex ring protrudes from the outer wall of the end of the connector body and surrounds the connector body. The second connector is inserted into the first connector, and the convex ring abuts against the inner wall of the first connector.

4. The battery device as claimed in claim 2, characterized in that, The reinforcing beam has a recessed clearance groove on its side facing the heat exchange structure, the second joint is located in the clearance groove, and the first joint abuts against the bottom wall of the clearance groove.

5. The battery device as claimed in claim 1, characterized in that, The reinforcing beam is disposed between two adjacent sets of battery cell modules, and the heat exchange structure is provided on both sides of the reinforcing beam along the first direction. The two ends of the flow channel are respectively connected to the heat exchange structure on both sides.

6. The battery device according to any one of claims 1 to 5, characterized in that, The liquid inlet and liquid outlet of the heat exchange structure are located at one end of the heat exchange structure along the second direction and arranged along the third direction; The reinforcing beam includes two flow channels arranged along the third direction, which are respectively connected to the inlet and the outlet, and the third direction is the depth direction of the receiving cavity.

7. The battery device according to any one of claims 1 to 5, characterized in that, The reinforcing beam includes a connected beam body and a connecting section. The beam body extends along the second direction, and the connecting section is located at the end of the beam body and is connected to the inner sidewall of the box body. The width of the connecting segment gradually increases in the direction away from the beam.

8. The battery device according to any one of claims 1 to 5, characterized in that, The reinforcing beam is a one-piece structure.

9. The battery device according to any one of claims 1 to 5, characterized in that, The heat exchange assembly also includes a connecting pipe, through which the heat exchange medium channels of two adjacent heat exchange structures are connected; And / or, the heat exchange structure includes a heat exchange body and a current collector, the heat exchange body extends along the second direction and contacts the battery cell assembly, the heat exchange body is provided with the heat exchange medium channel, the current collector is provided at the end of the heat exchange body along the second direction and communicates with the heat exchange medium channel, and the current collector is communicated with the flow guide channel or another heat exchange structure.

10. The battery device according to any one of claims 1 to 5, characterized in that, The battery cell has two first surfaces disposed opposite each other along the first direction and two second surfaces disposed opposite each other along the second direction, wherein the area of ​​the first surface is greater than the area of ​​the second surface.

11. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 10.

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