Liquid cooling device, battery device and power utilization device

Abstract

The embodiment of the utility model discloses a liquid cooling device, a battery device and an electric device. The liquid cooling device comprises a liquid cooling pipe used for containing cooling liquid, and the liquid cooling pipe is provided with a liquid through hole; the liquid passing component is communicated with the liquid cooling pipe through the liquid passing hole, and the liquid passing component is used for injecting cooling liquid into the liquid cooling pipe or outputting the cooling liquid out of the liquid cooling pipe; and the flow dividing component is arranged in the accommodating space of the liquid cooling pipe, and the flow dividing component is used for limiting the flow speed of the cooling liquid in the axial direction of the liquid cooling pipe. By arranging the shunting component in the liquid cooling device, the flow velocity of the cooling liquid can be limited, so that the cooling rate of the cooling device on the battery monomers is balanced.

Description

Technical Field

[0001] The present application relates to the field of batteries, and more specifically, to a liquid cooling device, a battery device and an electrical device. Background Art

[0002] The liquid cooling device in the current battery device has inconsistent flow resistance in different directions due to the fixed module arrangement, which in turn leads to inconsistent flow rates of the coolant and inconsistent cooling rates of the battery cells. Utility Model Content

[0003] The embodiments of the present application provide a liquid cooling device, a battery device, and an electrical device, which can limit the flow rate of the coolant, thereby balancing the cooling rate of the battery cells by the cooling device.

[0004] In a first aspect, the present application provides a liquid cooling device, comprising a liquid cooling tube for containing cooling liquid, the liquid cooling tube being provided with a liquid through hole; a liquid through component, the liquid through component being connected to the liquid cooling tube through the liquid through hole, the liquid through component being used to inject cooling liquid into the liquid cooling tube or output cooling liquid from the liquid cooling tube; a diverter component, the diverter component being provided in the accommodating space of the liquid cooling tube, the diverter component being used to limit the flow rate of the cooling liquid along the axial direction of the liquid cooling tube.

[0005] In the embodiment of the present application, by setting a flow diversion component in the liquid cooling device, when the coolant flows through the flow diversion component, the flow diversion component changes the original flow path of the coolant, thereby changing the flow rate of the coolant. When the flow rate of the coolant can be changed by the flow diversion component, the flow rate of the coolant in each direction of the liquid cooling pipe can be adjusted by the flow diversion component, so that the flow rate of the coolant in each direction of the liquid cooling pipe is uniform, and then the cooling rate of the battery cells affected by the liquid cooling device in different areas is uniform, providing a more stable working environment for the battery cells.

[0006] In some embodiments of the first aspect, the diverter member includes a first boss and a second boss arranged at intervals, the first boss includes a first inclined surface, the second boss includes a second inclined surface, the first inclined surface and the second inclined surface are both inclined relative to the axial direction of the liquid cooling tube, and the coolant is used to pass between the first inclined surface and the second inclined surface to limit the flow rate of the coolant.

[0007] In an embodiment of the present application, a first boss and a second boss are provided, and the flow path of the coolant in the liquid cooling tube can be limited by the edge configuration of the first boss or the second boss. For example, the coolant can be guided to flow in a direction inclined to the axial direction by the first inclined surface of the first boss or the second inclined surface of the second boss, and the flow rate of the coolant is limited and adjusted according to the degree of inclination of the first inclined surface or the second inclined surface to the axial direction of the liquid cooling tube, thereby making the flow rate of the coolant in all directions of the liquid cooling tube uniform, and thereby making the cooling rate of the battery cells affected by the liquid cooling device in different areas uniform, providing a more stable working environment for the battery cells.

[0008] In some embodiments of the first aspect, along the axial direction of the liquid cooling tube, the distance between the first inclined surface and the axis of the liquid cooling tube is positively correlated with the distance between the first inclined surface and the liquid hole, and the distance between the second inclined surface and the axis of the liquid cooling tube is positively correlated with the distance between the second inclined surface and the liquid hole.

[0009] In the embodiment of the present application, by setting the inclination relationship between the first inclined surface and the second inclined surface relative to the axis of the liquid cooling tube, the first inclined surface and the second inclined surface can form an opening for adjusting the flow rate of the coolant through the liquid hole, so that when the coolant is injected or output, the flow rate of the coolant is limited to a certain extent, thereby making the flow rate of the coolant in all directions of the liquid cooling tube uniform, and further making the cooling rate of the battery cells affected by the liquid cooling device in different areas uniform, providing a more stable working environment for the battery cells.

[0010] In some embodiments of the first aspect, the first boss also includes a third bevel, the second boss also includes a fourth bevel, the liquid-passing component corresponds to the area between the first boss and the second boss, the first bevel and the third bevel correspond to the two sides of the liquid-passing component along the axial direction of the liquid cooling tube, the second bevel and the fourth bevel correspond to the two sides of the liquid-passing component along the axial direction of the liquid cooling tube, the coolant is used to pass between the first bevel and the second bevel along the first direction to limit the flow rate of the coolant along the first direction, the coolant is used to pass between the third bevel and the fourth bevel along the second direction to limit the flow rate of the coolant along the second direction, and the first direction is opposite to the second direction.

[0011] In an embodiment of the present application, by setting the liquid-passing component to correspond to the area between the first boss and the second boss, and setting a third inclined plane in addition to the first inclined plane on the first boss, and setting a fourth inclined plane in addition to the second inclined plane on the second boss, the flow rate of the coolant flowing from the first direction and the coolant flowing from the second direction can be limited and regulated under the synergistic action of each inclined plane (the first inclined plane, the second inclined plane, the third inclined plane and the fourth inclined plane), thereby making the flow rate of the coolant in each direction of the liquid cooling pipe uniform, and further making the cooling rate of the battery cells affected by the liquid cooling device in different areas uniform, providing a more stable working environment for the battery cells.

[0012] In some embodiments of the first aspect, along the axial direction of the liquid cooling tube, the distance between the third slope and the axis of the liquid cooling tube is positively correlated with the distance between the third slope and the liquid hole, and the distance between the fourth slope and the axis of the liquid cooling tube is positively correlated with the distance between the fourth slope and the liquid hole.

[0013] In the embodiment of the present application, by setting the inclination relationship between the third inclined plane and the fourth inclined plane relative to the axis of the liquid cooling tube, the third inclined plane and the fourth inclined plane can form an opening for adjusting the flow rate of the coolant through the liquid hole, thereby limiting the flow rate of the coolant when injecting or outputting the coolant, thereby making the flow rate of the coolant in all directions of the liquid cooling tube uniform, and further making the cooling rate of the battery cells affected by the liquid cooling device in different areas uniform, providing a more stable working environment for the battery cells.

[0014] In some embodiments of the first aspect, the liquid hole is arranged on the first wall of the liquid cooling tube. Along the direction perpendicular to the first wall, the quadrilateral projection area of ​​the hexahedron with the first inclined plane and the second inclined plane as opposite faces is the first zone, and the quadrilateral projection area of ​​the hexahedron with the third inclined plane and the fourth inclined plane as opposite faces is the second zone. The area ratio of the second zone to the first zone is in the range of [0.8,0.9].

[0015] In an embodiment of the present application, when the area ratio of the second zone to the first zone is in the range of [0.8, 0.9], the flow velocities of the coolant passing between the first slope and the second slope along the first direction and the coolant passing between the third slope and the fourth slope along the second direction are relatively close, so that the cooling rates of the battery cells affected by the liquid cooling device in different areas are relatively uniform, thereby providing a more stable working environment for the battery cells.

[0016] In some embodiments of the first aspect, the area ratio of the second region to the first region is 0.88.

[0017] In an embodiment of the present application, when the area ratio of the second zone to the first zone is 0.88, the flow rate of the coolant passing between the first slope and the second slope along the first direction is equal to the flow rate of the coolant passing between the third slope and the fourth slope along the second direction, so that the cooling rate of the battery cells acted upon by the liquid cooling device in different areas is uniform, thereby providing a more stable working environment for the battery cells.

[0018] In some embodiments of the first aspect, the first boss and the second boss are both connected to the bearing boss, and along a direction perpendicular to the first wall, a projection area of ​​the first boss and a projection area of ​​the second boss are both included in the projection area of ​​the bearing boss.

[0019] In the embodiment of the present application, a bearing boss connected to the first boss and the second boss is provided, so that the positions of the first boss and the second boss can be relatively fixed, so that when the first boss and the second boss are arranged in the liquid cooling tube as a whole, the flow rate of the coolant can be more finely limited, thereby improving the balance effect of the cooling rate of the battery cells affected by the liquid cooling device in different areas, thereby providing a more stable working environment for the battery cells.

[0020] In some embodiments of the first aspect, the thickness of the bearing boss along a direction perpendicular to the first wall ranges from [1.4, 1.6] mm.

[0021] In the embodiment of the present application, when the thickness of the bearing boss is in the range of [1.4, 1.6] mm, the thickness of the bearing boss can ensure that the connection between the first boss and the second boss and the bearing boss has a certain strength and has little effect on the flow rate of the liquid cooling medium.

[0022] In some embodiments of the first aspect, the diversion component includes a plurality of baffles, which are spaced apart circumferentially along the liquid cooling tube, and the baffles extend axially along the liquid cooling tube. The coolant is used to pass between the plurality of baffles, and the baffles are used to limit the flow rate of the coolant.

[0023] In an embodiment of the present application, when baffles are provided in the liquid cooling tube, which are spaced apart circumferentially along the liquid cooling tube and extend axially along the liquid cooling tube, the flow path of the coolant changes when the coolant passes through the intervals between the multiple baffles, thereby affecting its flow rate to a certain extent and thereby achieving flow rate regulation, thereby making the flow rate of the coolant in all directions of the liquid cooling tube uniform, and further making the cooling rate of the battery cells affected by the liquid cooling device in different areas uniform, thereby providing a more stable working environment for the battery cells.

[0024] In some embodiments of the first aspect, the liquid cooling tube includes a connecting piece and two sub-liquid cooling tubes, the connecting piece is provided with a liquid through hole, and the connecting piece is used to connect the two sub-liquid cooling tubes.

[0025] In the embodiment of the present application, by providing a sub-liquid cooling tube and a connector connecting two sub-liquid cooling tubes, the liquid cooling tube can be flexible in installation and disassembly; on the other hand, the connector can use a material with higher strength than the sub-liquid cooling tube, so that the liquid-passing component and the connector can be more tightly fixed when connected, and the connection strength of the connection between the connector and the sub-liquid cooling tube can be increased, so that the coolant will not leak during the flow of the liquid cooling tube.

[0026] In some embodiments of the first aspect, the material of the connecting piece includes any one of aluminum alloy, polypropylene, and polyamide.

[0027] In the embodiment of the present application, aluminum alloy, polypropylene or polyamide is selected as the material of the connecting piece, so that the connecting piece can be lightweight while being able to withstand the corrosion of the coolant, and having a certain mechanical strength to achieve a tighter fixation of the liquid-passing component and the connecting piece; and increase the connection strength of the connection between the connecting piece and the sub-liquid cooling pipe, so that the coolant will not leak during the flow in the liquid cooling pipe.

[0028] In some embodiments of the first aspect, the diverter member is disposed in the accommodating space of the liquid cooling tube by interference fit.

[0029] In the embodiment of the present application, the diverter component is arranged in the accommodating space of the liquid cooling tube by means of interference fit, which can facilitate the installation and disassembly of the diverter component and improve the tightness of the diverter component installed in the accommodating space of the liquid cooling tube.

[0030] In a second aspect, a battery device is provided, comprising a plurality of battery cells and a liquid cooling device as described in any one embodiment of the first aspect, wherein the liquid cooling device is used to dissipate heat for the battery cells.

[0031] In a third aspect, an electrical device is provided, comprising the battery device described in the second aspect, wherein the battery device is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application.

[0033] Figure 2 A partial structural schematic diagram of a battery device provided in an embodiment of the present application.

[0034] Figure 3 A schematic diagram of the structure of a liquid cooling device provided in an embodiment of the present application.

[0035] Figure 4 A cross-sectional view of a liquid cooling device provided in an embodiment of the present application.

[0036] Figure 5 Another cross-sectional view of the liquid cooling device provided in an embodiment of the present application.

[0037] Figure 6 Another cross-sectional view of the liquid cooling device provided in an embodiment of the present application.

[0038] Figure 7 Another cross-sectional view of the liquid cooling device provided in an embodiment of the present application.

[0039] Figure 8 Another cross-sectional view of the liquid cooling device provided in an embodiment of the present application.

[0040] Fig. 9 Another cross-sectional view of the liquid cooling device provided in an embodiment of the present application.

[0041] Fig.10 Another cross-sectional view of the liquid cooling device provided in an embodiment of the present application.

[0042] Fig.11 Another cross-sectional view of the liquid cooling device provided in an embodiment of the present application.

[0043] Fig.12 Another schematic diagram of the structure of the liquid cooling device provided in an embodiment of the present application.

[0044] Reference numerals:

[0045] 1-vehicle; 10-battery device; 11-box; 111-first box part; 112-second box part; 20-battery monomer; 30-controller; 40-motor; 50-liquid cooling device; 51-liquid cooling pipe; 511-liquid hole; 512-first wall; 513-connector; 514-sub-liquid cooling pipe; 52-liquid passing member; 53-diverter member; 531-first boss; 5311-first inclined plane; 5312-third inclined plane; 532-second boss; 5321-second inclined plane; 5322-fourth inclined plane; 533-bearing boss; 534-baffle;

[0046] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; 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" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0050] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0051] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", 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 a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0053] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0054] The term "multiple" as used in the present application refers to more than two (including two). Similarly, the term "multiple groups" refers to more than two groups (including two groups), and the term "multiple sheets" refers to more than two sheets (including two sheets).

[0055] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0056] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0057] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0058] 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 hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0059] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, which is arranged between the negative electrode and the positive electrode. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and released back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0060] In some embodiments, the battery cell may include a shell. The shell may be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell) or an aluminum-plastic film. In some embodiments, the shell may be a sealed structure or a non-sealed structure. As an example, when the shell is a non-sealed structure, the shell plays a role in protecting the electrode assembly, and a sealed bag is also included between the shell and the electrode assembly, and the sealed bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealed bag may be a bag-shaped insulating member or an aluminum-plastic film. When the shell is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0061] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in this application.

[0062] In some embodiments, the housing includes an end cap and a shell, the shell is provided with an opening, and the end cap is provided to cover the opening. The shell may be provided with one or more openings. One or more end caps may also be provided.

[0063] In some embodiments, at least one electrode terminal is disposed on the housing, and the electrode terminal is electrically connected to the electrode tab. The electrode terminal may be directly connected to the electrode tab, or may be indirectly connected to the electrode tab through a current collecting member. The electrode terminal may be disposed on an end cap, or may be disposed on the housing.

[0064] During the use of the battery device, a liquid cooling device needs to be installed at the position corresponding to the battery cell in the battery device to cool down the working battery cell and provide a good working environment for the battery cell. However, the flow resistance in different directions of the liquid cooling device is inconsistent, resulting in uneven flow rate of the coolant in the liquid cooling device, which in turn leads to inconsistent cooling rates of the battery cells in different areas of the liquid cooling device.

[0065] The embodiments of the present application provide a liquid cooling device, a battery device and an electrical device, which can solve the above problems. The liquid cooling device of the embodiments of the present application includes a liquid cooling tube, a liquid passing component and a diverter component. The liquid cooling tube is used to contain the cooling liquid, and the liquid cooling tube is provided with a liquid passing hole; the liquid passing component is connected to the liquid cooling tube through the liquid passing hole, and the liquid passing component is used to inject the cooling liquid into the liquid cooling tube or output the cooling liquid to the liquid cooling tube; the diverter component is provided in the containing space of the liquid cooling tube, and the diverter component is used to limit the flow rate of the cooling liquid along the axial direction of the liquid cooling tube.

[0066] The present application sets a diverter component in the liquid cooling device, which can limit and regulate the flow rate of the coolant along the axial direction of the liquid cooling tube, so that the flow rate in each direction in the liquid cooling tube is uniform, and further the cooling rate of the battery cells in different areas affected by the liquid cooling tube is consistent.

[0067] The technical solutions described in the embodiments of the present application are applicable to various electrical equipment using battery devices.

[0068] Electrical equipment may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, electric tools, and the like. Vehicles may be fuel vehicles, gas vehicles, or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, and the like; spacecraft include airplanes, rockets, space shuttles, and spacecraft, and the like; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical equipment.

[0069] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0070] For example, Figure 1As shown, it is a structural schematic diagram of a vehicle according to an embodiment of the present application. The vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 40, a controller 30 and a battery device 10 can be arranged inside the vehicle 1. The controller 30 is used to control the battery device 10 to power the motor 40. For example, a battery device 10 can be arranged at the bottom, front or rear of the vehicle 1. The battery device 10 can be used to power the vehicle 1. For example, the battery device 10 can be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, for example, for the working power requirements of the vehicle 1 during startup, navigation and operation. In another embodiment of the present application, the battery device 10 can not only be used as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0071] Figure 2 FIG. 1 is a schematic diagram showing a partial structure of a battery device according to an embodiment of the present application. Figure 2 As shown, the battery device 10 of the embodiment of the present application may include a plurality of battery cells 20 to meet different power requirements. The shape of the battery cell 20 of the embodiment of the present application may be set according to the actual application. For example, the battery cell 20 may be as follows: Figure 2 The cylindrical shape shown, or it can also be different from Figure 2 The rectangular parallelepiped or other shapes shown are not limited to the embodiments of the present application.

[0072] It should be understood that Figure 2 As shown, the battery device 10 of the embodiment of the present application may further include a box body 11, which may be used to accommodate a plurality of battery cells 20. The interior of the box body 11 of the embodiment of the present application is a hollow structure, and a plurality of battery cells 20 are accommodated in the box body 11. The box body 11 may include two parts, which are respectively referred to as a first box body part 111 and a second box body part 112, and the first box body part 111 and the second box body part 112 are snapped together. The shapes of the first box body part 111 and the second box body part 112 may be determined according to the shapes of the components accommodated inside. For example, they may be determined according to the shape of the combination of the plurality of battery cells 20 accommodated inside. At least one of the first box body part 111 and the second box body part 112 may have an opening. For example, as Figure 2As shown, the first box body 111 and the second box body 112 can both be hollow cuboids and each have an open face, the opening of the first box body 111 and the opening of the second box body 112 are arranged opposite to each other, and the first box body 111 and the second box body 112 are buckled together to form a box body 11 with a closed chamber, and the chamber can be used to accommodate multiple battery cells 20. Multiple battery cells 20 are connected in parallel, in series, or in mixed combination and placed in the box body 11 formed by the first box body 111 and the second box body 112 buckled together.

[0073] For example, different from Figure 2 As shown, only one of the first box body 111 and the second box body 112 may be a hollow cuboid with an opening, while the other is in a plate shape to cover the opening. Taking the second box body 112 as a hollow cuboid with an opening and the first box body 111 as a plate, the first box body 111 covers the opening of the second box body 112 to form a box body 11 with a closed chamber, which can be used to accommodate multiple battery cells 20.

[0074] Figure 3 The structure diagram of the liquid cooling device of the embodiment of the present application is shown. Figure 4 FIG. 2 shows a cross-sectional view of a liquid cooling device according to an embodiment of the present application. Figure 3 and Figure 4 As shown, the liquid cooling device 50 includes: a liquid cooling tube 51, which is used to accommodate the cooling liquid. The liquid cooling tube 51 is provided with a liquid through hole 511; a liquid through component 52, which is connected to the liquid cooling tube 51 through the liquid through hole 511, and the liquid through component 52 is used to inject the cooling liquid into the liquid cooling tube 51 or output the cooling liquid to the liquid cooling tube 51; a diverter component 53, which is provided in the accommodating space of the liquid cooling tube 51, and the diverter component 53 is used to limit the flow rate of the cooling liquid along the axial direction of the liquid cooling tube 51.

[0075] It should be understood that the cross-sectional shape of the liquid-passing member 52 may be circular, square, triangular, etc., as long as it matches the cross-sectional shape of the liquid-passing hole, and the embodiment of the present application does not limit this.

[0076] It should be understood that after the coolant is injected into the liquid cooling tube 51 from the liquid-passing component 52, the coolant flows in both the positive and negative axial directions of the liquid cooling tube 51, that is, the diverter component 53 can also be used to limit the flow rate of the coolant flowing in both the positive and negative axial directions along the liquid cooling tube 51.

[0077] Specifically, the liquid passing component 52 can be connected to the liquid passing hole 511 by welding, for example, welding the edge of the liquid passing component 52 to the inner wall of the liquid passing hole 511; or the liquid passing component 52 can be connected to the liquid passing hole 511 by integral molding, for example, the part of the liquid passing hole 511 extending outside the hole constitutes the liquid passing component 52.

[0078] Specifically, the coolant may be a water-based coolant, an ethylene glycol-based coolant, a propylene glycol-based coolant, etc., which is not limited in the embodiments of the present application.

[0079] By providing the diverter member 53 in the liquid cooling device 50, when the coolant flows through the diverter member 53, the diverter member 53 changes the original flow path of the coolant, thereby changing the flow rate of the coolant. When the flow rate of the coolant can be changed by the diverter member 53, the flow rate of the coolant in each direction of the liquid cooling pipe 51 can be adjusted by the diverter member 53, so that the flow rate of the coolant in each direction of the liquid cooling pipe 51 is uniform, and further the cooling rate of the battery cells 20 affected by the liquid cooling device 50 in different areas is uniform, providing a more stable working environment for the battery cells 20.

[0080] Figure 5 Another cross-sectional view of the liquid cooling device of the embodiment of the present application is shown. Figure 5 As shown, the diverter member 53 includes a first boss 531 and a second boss 532 that are spaced apart. The first boss 531 includes a first inclined surface 5311, and the second boss 532 includes a second inclined surface 5321. Both the first inclined surface 5311 and the second inclined surface 5321 are inclined relative to the axial direction of the liquid cooling tube 51. The coolant is used to pass between the first inclined surface 5311 and the second inclined surface 5321 to limit the flow rate of the coolant.

[0081] The first boss 531 and the second boss 532 are provided, and the flow path of the coolant in the liquid cooling tube 51 can be limited by the edge configuration of the first boss 531 or the second boss 532. For example, the coolant can be guided to flow in a direction inclined to the axial direction by the first inclined surface 5311 of the first boss 531 or the second inclined surface 5321 of the second boss 532, and the flow rate of the coolant is limited and adjusted according to the degree of inclination of the first inclined surface 5311 or the second inclined surface 5321 and the axial direction of the liquid cooling tube 51, so that the flow rate of the coolant in all directions of the liquid cooling tube 51 is uniform, and then the cooling rate of the battery cells 20 acted on by the liquid cooling device 50 in different areas is uniform, providing a more stable working environment for the battery cells 20.

[0082] It should be understood that the first boss 531 and the second boss 532 may be disposed opposite to each other along the axial sides of the liquid cooling tube 51 , so that the cooling liquid passes between the first inclined surface 5311 of the first boss 531 and the second inclined surface 5321 of the second boss 532 .

[0083] Figure 6 Another cross-sectional view of the liquid cooling device of the embodiment of the present application is shown. Figure 6As shown, along the axial direction of the liquid cooling tube 51, the distance between the first inclined surface 5311 and the axis of the liquid cooling tube 51 is positively correlated with the distance between the first inclined surface 5311 and the liquid hole 511, and the distance between the second inclined surface 5321 and the axis of the liquid cooling tube 51 is positively correlated with the distance between the second inclined surface 5321 and the liquid hole 511.

[0084] By setting the inclination relationship between the first inclined surface 5311 and the second inclined surface 5321 relative to the axis of the liquid cooling tube 51, the first inclined surface 5311 and the second inclined surface 5321 can form an opening for adjusting the flow rate of the coolant from the liquid hole 511, so that when the coolant is injected or output, the flow rate of the coolant is limited to a certain extent, so that the flow rate of the coolant in all directions of the liquid cooling tube 51 is uniform, and then the cooling rate of the battery cells 20 affected by the liquid cooling device 50 in different areas is unified, providing a more stable working environment for the battery cells 20.

[0085] It should be understood that Figure 6 As shown, as the positive correlation described above, that is, taking the liquid hole 511 in the figure as the starting point, the opening formed between the first inclined surface 5311 and the second inclined surface 5321 gradually increases. When the liquid hole 511 is used to inject coolant into the liquid cooling tube 51, the coolant injected by the liquid hole 511 flows from the opening formed by the first inclined surface 5311 and the second inclined surface 5321 into the conventional flow channel of the liquid cooling tube 51 without adding the diverter component 53, that is, the flow channel undergoes a change process from gradually widening to stable; and when the liquid hole 511 is used to output the coolant to the liquid cooling tube 51, the coolant flows from the conventional flow channel of the liquid cooling tube 51 without adding the diverter component 53 into the opening formed by the first inclined surface 5311 and the second inclined surface 5321, that is, the flow channel undergoes a change process of gradually narrowing during this period. The expansion and convergence of the opening formed between the first inclined surface 5311 and the second inclined surface 5321 will have a certain impact on the flow rate of the coolant.

[0086] Figure 7 Another cross-sectional view of the liquid cooling device of the embodiment of the present application is shown. Figure 7As shown, X1 is the first direction, X2 is the second direction, the first boss 531 also includes a third bevel 5312, the second boss 532 also includes a fourth bevel 5322, the liquid-passing component 52 corresponds to the area between the first boss 531 and the second boss 532, the first bevel 5311 and the third bevel 5312 correspond to the two sides of the liquid-passing component 52 along the axial direction of the liquid-cooling tube 51, the second bevel 5321 and the fourth bevel 5322 correspond to the two sides of the liquid-passing component 52 along the axial direction of the liquid-cooling tube 51, the coolant is used to pass between the first bevel 5311 and the second bevel 5321 along the first direction to limit the flow rate of the coolant along the first direction, the coolant is used to pass between the third bevel 5312 and the fourth bevel 5322 along the second direction to limit the flow rate of the coolant along the second direction, and the first direction is opposite to the second direction.

[0087] By setting the liquid-passing component 52 to correspond to the area between the first boss 531 and the second boss 532, and setting a third inclined surface 5312 in addition to the first inclined surface 5311 on the first boss 531, and setting a fourth inclined surface 5322 in addition to the second inclined surface 5321 on the second boss 532, the flow rates of the coolant flowing from the first direction and the coolant flowing from the second direction can be limited and regulated under the coordinated action of each inclined surface (the first inclined surface 5311, the second inclined surface 5321, the third inclined surface 5312 and the fourth inclined surface 5322), so that the flow rate of the coolant in each direction of the liquid cooling pipe 51 is uniform, and then the cooling rate of the battery cell 20 affected by the liquid cooling device 50 in different areas is uniform, providing a more stable working environment for the battery cell 20.

[0088] It should be understood that the coolant injected from the liquid hole 511 will flow in two opposite directions after being injected, that is, Figure 7 The first direction and the second direction shown in .

[0089] It should be understood that when the liquid hole 511 is used to output coolant, the coolant passes between the first slope 5311 and the second slope 5321 along the second direction, and passes between the third slope 5312 and the fourth slope 5322 along the first direction, and each slope (the first slope 5311, the second slope 5321, the third slope 5312 and the fourth slope 5322) also limits the flow rate.

[0090] Figure 8 Another cross-sectional view of the liquid cooling device of the embodiment of the present application is shown. Figure 8 As shown, along the axial direction of the liquid cooling tube 51, the distance between the third inclined surface 5312 and the axis of the liquid cooling tube 51 is positively correlated with the distance between the third inclined surface 5312 and the liquid hole 511, and the distance between the fourth inclined surface 5322 and the axis of the liquid cooling tube 51 is positively correlated with the distance between the fourth inclined surface 5322 and the liquid hole 511.

[0091] By setting the inclination relationship between the third inclined surface 5312 and the fourth inclined surface 5322 relative to the axis of the liquid cooling tube 51, the third inclined surface 5312 and the fourth inclined surface 5322 can form an opening for adjusting the flow rate of the coolant from the liquid hole 511, so that when the coolant is injected or output, the flow rate of the coolant is limited to a certain extent, so that the flow rate of the coolant in all directions of the liquid cooling tube 51 is uniform, and then the cooling rate of the battery cells 20 affected by the liquid cooling device 50 in different areas is uniform, providing a more stable working environment for the battery cells 20.

[0092] It should be understood that Figure 8 As shown, as the positive correlation described above, that is, taking the liquid hole 511 in the figure as the starting point, the opening formed between the third inclined surface 5312 and the fourth inclined surface 5322 gradually increases. When the liquid hole 511 is used to inject coolant into the liquid cooling tube 51, the coolant injected by the liquid hole 511 flows from the opening formed by the third inclined surface 5312 and the fourth inclined surface 5322 into the conventional flow channel of the liquid cooling tube 51 without adding the diverter component 53, that is, the flow channel undergoes a change process from gradually widening to stable; and when the liquid hole 511 is used to output the coolant to the liquid cooling tube 51, the coolant flows from the conventional flow channel of the liquid cooling tube 51 without adding the diverter component 53 into the opening formed by the third inclined surface 5312 and the fourth inclined surface 5322, that is, the flow channel undergoes a change process of gradually narrowing during this period. The expansion and convergence of the opening formed between the third inclined surface 5312 and the fourth inclined surface 5322 will have a certain impact on the flow rate of the coolant.

[0093] Fig. 9 Another cross-sectional view of the liquid cooling device of the embodiment of the present application is shown. Fig. 9 As shown, A1 is the first zone, A2 is the second zone, the liquid hole 511 is provided on the first wall 512 of the liquid cooling tube 51, along the direction perpendicular to the first wall 512, the quadrilateral projection area of ​​the hexahedron with the first inclined surface 5311 and the second inclined surface 5321 as the opposite surfaces is the first zone, and the quadrilateral projection area of ​​the hexahedron with the third inclined surface 5312 and the fourth inclined surface 5322 as the opposite surfaces is the second zone, and the area ratio of the second zone to the first zone ranges from [0.8, 0.9].

[0094] When the area ratio of the second zone to the first zone is in the range of [0.8, 0.9], the flow speed of the coolant passing between the first slope 5311 and the second slope 5321 along the first direction is closer to the flow speed of the coolant passing between the third slope 5312 and the fourth slope 5322 along the second direction, so that the cooling rate of the battery cell 20 affected by the liquid cooling device 50 in different areas is more uniform, thereby providing a more stable working environment for the battery cell 20.

[0095] It should be understood that Fig. 9 As shown, the first zone and the second zone are marked with shaded areas in the figure respectively, and the areas of the first zone and the second zone are mainly affected by factors such as the degree of inclination of each inclined surface (the first inclined surface 5311, the second inclined surface 5321, the third inclined surface 5312 and the fourth inclined surface 5322) relative to the axial direction of the liquid cooling tube 51 and the width of the liquid cooling tube 51. To a certain extent, it can be reflected in the combined effect of the first boss 531 including the first inclined surface 5311 and the third inclined surface 5312 and the second boss 532 including the second inclined surface 5321 and the fourth inclined surface 5322, the limiting effect of the diverter component 53 on the flow velocity of the coolant in the liquid cooling tube 51.

[0096] In some embodiments, the area ratio of the second region to the first region is 0.88.

[0097] When the area ratio of the second zone to the first zone is 0.88, the flow velocity of the coolant passing between the first slope 5311 and the second slope 5321 along the first direction is equal to the flow velocity of the coolant passing between the third slope 5312 and the fourth slope 5322 along the second direction, so that the cooling rate of the battery cell 20 acted upon by the liquid cooling device 50 in different areas is uniform, thereby providing a more stable working environment for the battery cell 20.

[0098] Fig.10 Another cross-sectional view of the liquid cooling device of the embodiment of the present application is shown. Fig.10 As shown, the first boss 531 and the second boss 532 are both connected to the bearing boss 533 , and along the direction perpendicular to the first wall 512 , the projection area of ​​the first boss 531 and the projection area of ​​the second boss 532 are both included in the projection area of ​​the bearing boss 533 .

[0099] The supporting boss 533 connected to the first boss 531 and the second boss 532 is provided so that the positions of the first boss 531 and the second boss 532 can be relatively fixed, so that when the first boss 531 and the second boss 532 are provided as a whole in the liquid cooling tube 51, the flow rate of the coolant can be more precisely limited, thereby improving the balance effect of the cooling rate of the battery cells 20 affected by the liquid cooling device 50 in different areas, thereby providing a more stable working environment for the battery cells 20.

[0100] It should be understood that the first boss 531, the second boss 532 and the supporting boss 533 can be cast in an integral manner; or the first boss 531, the second boss 532 are connected to the supporting boss 533 by gluing, for example, adhesive is applied between the contact surfaces of the first boss 531, the second boss 532 and the supporting boss 533 and the gluing is performed; or the first boss 531, the second boss 532 are connected to the supporting boss 533 by splicing, for example, bumps on the first boss 531 and the second boss 532 are convexly provided along the contact surfaces of the first boss 531, the second boss 532 and the supporting boss 533, and are plugged into grooves on the supporting boss 533.

[0101] In some embodiments, the thickness of the supporting boss 533 along a direction perpendicular to the first wall 512 ranges from [1.4, 1.6] mm.

[0102] When the thickness of the bearing boss 533 is in the range of [1.4, 1.6] mm, the thickness of the bearing boss 533 can ensure that the connection between the first boss 531 and the second boss 532 and the bearing boss 533 has a certain strength and has little effect on the flow rate of the liquid cooling medium.

[0103] Fig.11 Another cross-sectional view of the liquid cooling device of the embodiment of the present application is shown. Fig.11 As shown, the diverter component 53 includes a plurality of baffles 534, which are distributed at intervals along the circumference of the liquid cooling tube 51, and the baffles 534 extend axially along the liquid cooling tube 51. The coolant is used to pass between the plurality of baffles 534, and the baffles 534 are used to limit the flow rate of the coolant.

[0104] When baffles 534 are provided in the liquid cooling tube 51 and are distributed at intervals along the circumference of the liquid cooling tube 51 and extend along the axial direction of the liquid cooling tube 51, the flow path of the coolant changes when the coolant passes through the intervals between the multiple baffles 534, which has a certain impact on its flow rate and thereby realizes the regulation of the flow rate, so that the flow rate of the coolant in all directions of the liquid cooling tube 51 is uniform, and further the cooling rate of the battery cells 20 affected by the liquid cooling device 50 in different areas is uniform, providing a more stable working environment for the battery cells 20.

[0105] It should be understood that except Fig.11 In addition to the rectangular parallelepiped configuration of the spoiler 534 shown, the spoiler 534 may also have other configurations, such as a cylinder or a triangular prism, etc., which is not limited in the embodiments of the present application.

[0106] Fig.12 Another structural schematic diagram of the liquid cooling device of an embodiment of the present application is shown. Fig.12As shown, the liquid cooling tube 51 includes a connector 513 and two sub-liquid cooling tubes 514 . The connector 513 is provided with a liquid through hole 511 . The connector 513 is used to connect the two sub-liquid cooling tubes 514 .

[0107] By providing a sub-liquid cooling tube 514 and a connector 513 connecting the two sub-liquid cooling tubes 514, the liquid cooling tube 51 can be made flexible in installation and disassembly; on the other hand, the connector 513 can use a material with higher strength than the sub-liquid cooling tube 514, so that the liquid-passing component 52 and the connector 513 can be more tightly fixed when connected, and the connection strength of the connection between the connector 513 and the sub-liquid cooling tube 514 can be increased, so that the coolant will not leak during the flow of the coolant in the liquid cooling tube 51.

[0108] It should be understood that when the connector 513 is provided with a liquid hole 511, a corresponding liquid inlet connector and a liquid outlet connector can be provided, the liquid hole 511 provided on the liquid inlet connector is used to inject coolant, and the liquid hole 511 provided on the liquid outlet connector is used to output coolant.

[0109] It should be understood that the layout of the sub-liquid cooling tubes 514 should take into account the arrangement positions of the battery cells 20 in each region, and should try to take into account the battery cells 20 at each position, so as to achieve uniform heat dissipation of the battery cells 20 as a whole.

[0110] In some embodiments, the material of the connector 513 includes any one of aluminum alloy, polypropylene, and polyamide.

[0111] Selecting aluminum alloy, polypropylene or polyamide as the material of the connector 513 can make the connector 513 lighter and able to withstand the corrosion of the coolant, and have a certain mechanical strength to achieve a tighter fixation between the liquid-passing component 52 and the connector 513; and increase the connection strength between the connector 513 and the sub-liquid cooling pipe 514, so that the coolant will not leak during the flow in the liquid cooling pipe 51.

[0112] It should be understood that the material of the connecting member 513 may also be other lightweight and corrosion-resistant metal materials or polymer materials, and the embodiment of the present application is not limited to this.

[0113] In some embodiments, the diverter member 53 is disposed in the accommodating space of the liquid cooling tube 51 by interference fit.

[0114] The diverter member 53 is arranged in the accommodation space of the liquid cooling tube 51 by interference fit, which can facilitate the installation and removal of the diverter member 53 and improve the tightness of the diverter member 53 installed in the accommodation space of the liquid cooling tube 51.

[0115] It should be understood that the diverter component 53 can also be installed in the accommodating space of the liquid cooling tube 51 by other means, such as by welding at the contact surface between the diverter component 53 and the liquid cooling tube 51; or by bonding by applying adhesive at the contact surface between the diverter component 53 and the liquid cooling tube 51 and bonding them.

[0116] According to some embodiments of the present application, see Figures 3 to 12 The present application provides a liquid cooling device 50, including a liquid cooling tube 51, which is used to accommodate cooling liquid. The liquid cooling tube 51 is provided with a liquid through hole 511; a liquid through component 52, which is connected to the liquid cooling tube 51 through the liquid through hole 511, and is used to inject cooling liquid into the liquid cooling tube 51 or output the cooling liquid from the liquid cooling tube 51; a diverter component 53, which is arranged in the accommodating space of the liquid cooling tube 51, and is used to limit the flow rate of the cooling liquid along the axial direction of the liquid cooling tube 51.

[0117] The diverter member 53 includes a first boss 531 and a second boss 532 that are spaced apart. The first boss 531 includes a first inclined surface 5311, and the second boss 532 includes a second inclined surface 5321. Both the first inclined surface 5311 and the second inclined surface 5321 are inclined relative to the axial direction of the liquid cooling tube 51. The coolant is used to pass between the first inclined surface 5311 and the second inclined surface 5321 to limit the flow rate of the coolant.

[0118] Along the axial direction of the liquid cooling tube 51, the distance between the first inclined surface 5311 and the axis of the liquid cooling tube 51 is positively correlated with the distance between the first inclined surface 5311 and the liquid hole 511, and the distance between the second inclined surface 5321 and the axis of the liquid cooling tube 51 is positively correlated with the distance between the second inclined surface 5321 and the liquid hole 511.

[0119] The first boss 531 also includes a third bevel 5312, and the second boss 532 also includes a fourth bevel 5322. The liquid-passing component 52 corresponds to the area between the first boss 531 and the second boss 532. The first bevel 5311 and the third bevel 5312 correspond to the two sides of the liquid-passing component 52 along the axial direction of the liquid-cooling tube 51, and the second bevel 5321 and the fourth bevel 5322 correspond to the two sides of the liquid-passing component 52 along the axial direction of the liquid-cooling tube 51. The coolant is used to pass between the first bevel 5311 and the second bevel 5321 along the first direction to limit the flow rate of the coolant along the first direction. The coolant is used to pass between the third bevel 5312 and the fourth bevel 5322 along the second direction to limit the flow rate of the coolant along the second direction. The first direction is opposite to the second direction.

[0120] Along the axial direction of the liquid cooling tube 51, the distance between the third inclined surface 5312 and the axis of the liquid cooling tube 51 is positively correlated with the distance between the third inclined surface 5312 and the liquid hole 511, and the distance between the fourth inclined surface 5322 and the axis of the liquid cooling tube 51 is positively correlated with the distance between the fourth inclined surface 5322 and the liquid hole 511.

[0121] The liquid hole 511 is arranged on the first wall 512 of the liquid cooling tube 51. Along the direction perpendicular to the first wall 512, the quadrilateral projection area of ​​the hexahedron with the first inclined surface 5311 and the second inclined surface 5321 as opposite surfaces is the first zone, and the quadrilateral projection area of ​​the hexahedron with the third inclined surface 5312 and the fourth inclined surface 5322 as opposite surfaces is the second zone. The area ratio of the second zone to the first zone is in the range of [0.8, 0.9].

[0122] In some embodiments, the area ratio of the second region to the first region is 0.88.

[0123] The first boss 531 and the second boss 532 are both connected to the bearing boss 533 . Along the direction perpendicular to the first wall 512 , the projection area of ​​the first boss 531 and the projection area of ​​the second boss 532 are both included in the projection area of ​​the bearing boss 533 .

[0124] The thickness of the bearing boss 533 along the direction perpendicular to the first wall 512 ranges from [1.4, 1.6] mm.

[0125] The flow dividing member 53 includes a plurality of baffles 534 , which are spaced apart along the circumference of the liquid cooling tube 51 and extend along the axial direction of the liquid cooling tube 51 . The coolant is used to pass between the plurality of baffles 534 , and the baffles 534 are used to limit the flow rate of the coolant.

[0126] The liquid cooling tube 51 includes a connector 513 and two sub-liquid cooling tubes 514 . The connector 513 is provided with a liquid through hole 511 . The connector 513 is used to connect the two sub-liquid cooling tubes 514 .

[0127] The material of the connecting member 513 includes any one of aluminum alloy, polypropylene, and polyamide.

[0128] The flow dividing member 53 is disposed in the accommodation space of the liquid cooling tube 51 by interference fit.

[0129] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A liquid cooling device, characterized in that: include: A liquid cooling tube (51) for containing cooling liquid, wherein the liquid cooling tube (51) is provided with a liquid through hole (511); a liquid-passing component (52), the liquid-passing component (52) being in communication with the liquid-cooling pipe (51) via the liquid-passing hole (511), the liquid-passing component (52) being used to inject the cooling liquid into the liquid-cooling pipe (51) or to output the cooling liquid to the liquid-cooling pipe (51); A flow dividing component (53), the flow dividing component (53) being arranged in the accommodation space of the liquid cooling tube (51), the flow dividing component (53) being used to limit the flow velocity of the cooling liquid along the axial direction of the liquid cooling tube (51).

2. The liquid cooling device according to claim 1, characterized in that: The diverter member (53) comprises a first boss (531) and a second boss (532) which are arranged at intervals, the first boss (531) comprises a first inclined surface (5311), the second boss (532) comprises a second inclined surface (5321), the first inclined surface (5311) and the second inclined surface (5321) are both inclined relative to the axial direction of the liquid cooling tube (51), and the coolant is used to pass between the first inclined surface (5311) and the second inclined surface (5321) to limit the flow rate of the coolant.

3. The liquid cooling device according to claim 2, characterized in that: Along the axial direction of the liquid cooling tube (51), the distance between the first inclined surface (5311) and the axis of the liquid cooling tube (51) is positively correlated with the distance between the first inclined surface (5311) and the liquid through hole (511), and the distance between the second inclined surface (5321) and the axis of the liquid cooling tube (51) is positively correlated with the distance between the second inclined surface (5321) and the liquid through hole (511).

4. The liquid cooling device according to claim 2, characterized in that: The first boss (531) further includes a third inclined surface (5312), the second boss (532) further includes a fourth inclined surface (5322), and the liquid-passing member (52) corresponds to a region between the first boss (531) and the second boss (532). The first inclined surface (5311) and the third inclined surface (5312) correspond to two sides of the liquid-passing component (52) along the axial direction of the liquid-cooling tube (51), and the second inclined surface (5321) and the fourth inclined surface (5322) correspond to two sides of the liquid-passing component (52) along the axial direction of the liquid-cooling tube (51). The coolant is used to pass along a first direction between the first slope (5311) and the second slope (5321) to limit the flow rate of the coolant along the first direction, and the coolant is used to pass along a second direction between the third slope (5312) and the fourth slope (5322) to limit the flow rate of the coolant along the second direction. The first direction is opposite to the second direction.

5. The liquid cooling device according to claim 4, characterized in that: Along the axial direction of the liquid cooling tube (51), the distance between the third inclined surface (5312) and the axis of the liquid cooling tube (51) is positively correlated with the distance between the third inclined surface (5312) and the liquid through hole (511), and the distance between the fourth inclined surface (5322) and the axis of the liquid cooling tube (51) is positively correlated with the distance between the fourth inclined surface (5322) and the liquid through hole (511).

6. The liquid cooling device according to claim 4, characterized in that: The liquid through hole (511) is arranged on the first wall (512) of the liquid cooling tube (51), and along the direction perpendicular to the first wall (512), the quadrilateral projection area of ​​the hexahedron with the first inclined surface (5311) and the second inclined surface (5321) as opposite surfaces is the first zone, and the quadrilateral projection area of ​​the hexahedron with the third inclined surface (5312) and the fourth inclined surface (5322) as opposite surfaces is the second zone, and the area ratio of the second zone to the first zone is in the range of [0.8, 0.9].

7. The liquid cooling device according to claim 6, characterized in that: The area ratio of the second region to the first region is 0.

88.

8. The liquid cooling device according to claim 6, characterized in that: The first boss (531) and the second boss (532) are both connected to the bearing boss (533), and along a direction perpendicular to the first wall (512), the projection area of ​​the first boss (531) and the projection area of ​​the second boss (532) are both included in the projection area of ​​the bearing boss (533).

9. The liquid cooling device according to claim 8, characterized in that: The thickness of the bearing boss (533) along a direction perpendicular to the first wall (512) is in the range of [1.4, 1.6] mm.

10. The liquid cooling device according to claim 1, characterized in that: The flow dividing member (53) comprises a plurality of baffles (534), wherein the plurality of baffles (534) are spaced apart along the circumference of the liquid cooling tube (51), and the baffles (534) extend along the axial direction of the liquid cooling tube (51). The coolant is used to pass between the plurality of baffles (534), and the baffles (534) are used to limit the flow rate of the coolant.

11. The liquid cooling device according to any one of claims 1 to 10, characterized in that: The liquid cooling tube (51) comprises a connecting piece (513) and two sub-liquid cooling tubes (514); the connecting piece (513) is provided with the liquid through hole (511); and the connecting piece (513) is used to connect the two sub-liquid cooling tubes (514).

12. The liquid cooling device according to claim 11, characterized in that: The material of the connecting piece (513) includes any one of aluminum alloy, polypropylene, and polyamide.

13. The liquid cooling device according to any one of claims 1 to 10, characterized in that: The flow dividing component (53) is arranged in the accommodation space of the liquid cooling tube (51) through interference fit.

14. A battery device, characterized in that: The invention comprises a plurality of battery cells (20) and a liquid cooling device (50) according to any one of claims 1 to 13, wherein the liquid cooling device (50) is used for dissipating heat for the battery cells (20).

15. An electrical device, characterized in that: The battery device (10) as claimed in claim 14 is used to provide electrical energy.

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