Liquid inlet pipeline structure, liquid cooling device, battery pack and electric equipment

Abstract

The utility model belongs to the technical field of battery design, and particularly relates to a liquid inlet pipeline structure, a liquid cooling device, a battery pack and electric equipment. The liquid inlet pipeline structure comprises a main pipeline used for feeding liquid and conveying cooling liquid, and the main pipeline comprises a plurality of main pipe sections which are sequentially communicated; the branch pipes are used for distributing and conveying the cooling liquid in the main pipeline to the corresponding devices to be cooled so as to dissipate heat and reduce temperature, and one branch pipe is arranged between any two adjacent main pipe sections in a communicating mode; and in the flowing direction of the cooling liquid in the main pipeline, the average pipe inner diameter of any two adjacent main pipe sections is gradually reduced. By applying the technical scheme, the problem of how to reduce the number of liquid inlet pipelines under the condition that the cooling liquid flow of each liquid cooling plate is basically uniform is solved.

Description

Technical Field

[0001] The present application belongs to the technical field of battery design, and in particular relates to a liquid inlet pipeline structure, a liquid cooling device, a battery pack and electrical equipment. Background Art

[0002] At present, in order to meet the requirements of high endurance, electric vehicles generally use multiple batteries to form a battery pack, which stores electricity and supplies power, thereby storing a large amount of electricity to ensure high endurance. Among them, each battery of the electric vehicle is cooled and dissipated by liquid cooling. The liquid cooling method mainly uses the coolant in the liquid cooling plate to take away the heat generated by the battery during operation. One battery is equipped with a liquid cooling plate.

[0003] In the related art, in order to facilitate the flow regulation of the coolant in the liquid cooling plate, generally one liquid cooling plate is equipped with a corresponding liquid inlet pipe, so that the flow of the coolant in each liquid cooling plate can be adjusted separately, so that the flow of the coolant in each liquid cooling plate can be basically consistent, so as to achieve the purpose of uniform cooling and heat dissipation of each battery. However, this leads to an increase in the number of liquid inlet pipes, which not only takes up a large assembly space, but also leads to high costs due to the large number of liquid inlet pipes. Summary of the invention

[0004] The purpose of the present application is to provide a liquid inlet pipeline structure, a liquid cooling device, a battery pack and an electrical device, aiming to solve the problem of how to reduce the number of liquid inlet pipelines while ensuring that the coolant flow of each liquid cooling plate is basically uniform.

[0005] To achieve the above-mentioned purpose, according to the first aspect of the present application, the technical solution adopted in the present application is: a liquid inlet pipeline structure, comprising:

[0006] A main pipe, used for taking in liquid and conveying cooling liquid, the main pipe comprises a plurality of main pipe sections connected in sequence;

[0007] Multiple branch pipes are used to divert the coolant in the main pipe and transport it to the corresponding device to be cooled to dissipate heat and reduce temperature. A branch pipe is connected between any two adjacent main pipe sections;

[0008] Wherein, along the flow direction of the coolant in the main pipe, the average inner diameters of any two adjacent main pipe sections are gradually reduced.

[0009] Compared with the related art, the liquid inlet pipeline structure of the present application integrates multiple liquid inlet pipes into a main pipeline, and then uses each branch pipe to divert the coolant in the main pipeline and transport it to the device to be cooled for heat dissipation and cooling. In this way, the number of pipelines can be reduced, thereby greatly saving the assembly space used to assemble the liquid inlet pipeline structure, which is very beneficial for the limited assembly space. Moreover, in the liquid inlet pipeline structure of the present application, along the flow direction of the coolant in the main pipeline, the average inner diameter of any two adjacent main sections is gradually reduced, so that the coolant in the main pipeline flows faster the further back it flows on the flow path, so that the flow rate of the coolant flowing into each branch pipe can be kept basically consistent, that is, the flow rate of the coolant flowing to each device to be cooled is basically consistent, so that each device to be cooled can dissipate heat and cool evenly.

[0010] In some embodiments of the present application, along the flow direction of the coolant in the main pipe, the inner diameter of at least one main pipe section is gradually reduced, and the average inner diameter of the main pipe section located upstream of any two adjacent main pipe sections is greater than the average inner diameter of the main pipe section located downstream. In this way, the coolant in the main pipe flows faster as it flows further back on the flow path of the main pipe, so that the flow rate of the coolant flowing into each branch pipe can be kept basically consistent.

[0011] In some embodiments of the present application, the pipe passages of each main pipe section are pipe passages with constant inner diameters, and along the flow direction of the coolant in the main pipe, the inner diameter of the upstream main pipe section of any two adjacent main pipe sections is larger than the inner diameter of the downstream main pipe section. In this way, the coolant in the main pipe flows faster as it flows further back on the flow path of the main pipe, so that the flow rate of the coolant flowing into each branch pipe can be kept basically consistent.

[0012] In some embodiments of the present application, along the flow direction of the coolant in the main line, the inner diameters of any two adjacent branch pipes are gradually reduced. In this way, when the coolant flows from the main line into each branch pipe, the flow rate of the coolant flowing into the branch pipe becomes faster as the coolant flows further back along the flow path of the main line, so that the flow rate of the coolant flowing into each branch pipe can be kept basically consistent.

[0013] In some embodiments of the present application, the inner diameter of at least one branch pipe is gradually reduced along the flow direction of the coolant in the branch pipe, and along the flow direction of the coolant in the main pipe, the average inner diameter of the branch pipe located upstream of any two adjacent branch pipes is greater than the average inner diameter of the branch pipe located downstream. In this way, when the coolant flows from the main pipe into each branch pipe, the flow rate of the coolant flowing into the branch pipe becomes faster the further it flows along the flow path of the coolant in the main pipe, so that the flow rate of the coolant flowing into each branch pipe can be kept basically consistent.

[0014] In some embodiments of the present application, the pipe channels of each branch pipe are pipe channels with constant inner diameters, and along the flow direction of the coolant in the main pipe, the inner diameter of the upstream branch pipe of any two adjacent branch pipes is larger than the inner diameter of the downstream branch pipe. In this way, when the coolant flows from the main pipe into each branch pipe, the flow rate of the coolant flowing into the branch pipe becomes faster the further it flows along the flow path of the main pipe, so that the flow rate of the coolant flowing into each branch pipe can be kept basically consistent.

[0015] In some embodiments of the present application, the liquid inlet pipeline structure also includes a plurality of joint components, and the joint components are provided with a first joint end, a second joint end, and a third joint end that are interconnected, and the first joint end and the second joint end are respectively connected to two adjacent main pipe sections one by one, and the third joint end is connected to the corresponding branch pipe. The two adjacent main pipe sections and a corresponding branch pipe are connected by the joint components, which helps to improve the assembly efficiency. Among them, the channel opening diameter of the first joint end is greater than or equal to the channel opening diameter of the second joint end, and along the flow direction of the coolant in the main pipe, the channel opening diameter of the third joint end of the upstream joint component of any two adjacent joint components is greater than the channel opening diameter of the third joint end of the downstream joint component, so that the flow rate of the coolant flowing into each branch pipe can be kept basically consistent, so that each device to be cooled can dissipate heat and cool down evenly.

[0016] In some embodiments of the present application, in any joint component, the channel opening diameter of the first joint end and the channel opening diameter of the second joint end are both greater than or equal to the channel opening diameter of the third joint end. On the basis of ensuring that the flow rate of the coolant flowing into each branch pipe is basically the same, it can be ensured that a sufficient flow rate of coolant flows to the downstream main pipe section, so that the flow rate of the coolant flowing to each device to be cooled is basically the same.

[0017] In some embodiments of the present application, a plurality of main pipe sections are integrally formed into a main pipe.

[0018] According to the second aspect of the present application, a liquid cooling device is provided. Specifically, the liquid cooling device includes the liquid inlet pipeline structure as described above.

[0019] Compared with the related art, the liquid inlet pipeline structure adopted by the liquid cooling device of the present application integrates multiple liquid inlet pipes into a main pipeline, and then uses each branch pipe to divert the coolant in the main pipeline and transport it to the device to be cooled for heat dissipation and cooling. In this way, the number of pipelines can be reduced, thereby greatly saving the assembly space used to assemble the liquid inlet pipeline structure, which is very beneficial for the limited assembly space. Moreover, in the liquid inlet pipeline structure adopted by the liquid cooling device of the present application, along the flow direction of the coolant in the main pipeline, the average inner diameter of any two adjacent main pipeline sections is gradually reduced, so that the coolant in the main pipeline flows faster the further back it flows on the flow path, so that the flow rate of the coolant flowing into each branch pipe can be kept basically consistent, that is, the flow rate of the coolant flowing to each device to be cooled is basically consistent, so that each device to be cooled can dissipate heat and cool evenly.

[0020] In some embodiments of the present application, the liquid cooling device further includes a plurality of liquid cooling plates, each of which is provided with a liquid inlet interface end, and each of which is connected to each branch pipe in a one-to-one correspondence, and the liquid cooling plate is used to be arranged in contact with the device to be cooled in a one-to-one correspondence. The liquid inlet pipeline structure diverts the coolant in the main pipeline to the corresponding liquid cooling plates through each branch pipe, and heat is transferred to the coolant through the contact between the liquid cooling plate and the device to be cooled for heat conduction.

[0021] According to the third aspect of the present application, a battery pack is provided. Specifically, the battery pack includes:

[0022] Multiple batteries; and

[0023] As in the aforementioned at least one liquid cooling device, a plurality of liquid cooling plates are arranged in one-to-one correspondence with a plurality of batteries.

[0024] The liquid inlet pipeline structure diverts the coolant in the main pipeline to the corresponding liquid cooling plates through various branch pipes, and heat is transferred to the coolant through the contact between the liquid cooling plate and the battery. The coolant in the liquid cooling plate takes away the heat during the continuous flow, thereby achieving heat dissipation and cooling of the battery during the charging and discharging process. The liquid cooling effect is obvious, preventing the battery from having an excessively high operating temperature during the charging and discharging process and affecting normal operation.

[0025] In some embodiments of the present application, the battery includes a box shell and a battery cell, the box shell forms a storage space, the liquid cooling plate is installed at the bottom of the storage space, the battery cell is installed in the storage space and is in contact with the liquid cooling plate, and the corresponding branch pipe passes through the box shell and is connected to the liquid inlet interface of the liquid cooling plate. The liquid cooling plate is directly in contact with the battery cell, so that the heat generated by the battery cell during the charging and discharging process can be directly and quickly transferred to the liquid cooling plate, thereby achieving heat dissipation and cooling of the battery during the charging and discharging process.

[0026] In some embodiments of the present application, at least some of the batteries are laid out in a row, and the liquid inlet interface ends of the liquid cooling plates in the batteries laid out in a row are all located on the same side, wherein the arrangement direction of the batteries laid out in a row is parallel to the extension direction of at least some of the main lines.

[0027] In some embodiments of the present application, at least some of the batteries are stacked in sequence, and the liquid inlet interface ends of the liquid cooling plates in the stacked batteries are all located on the same side, wherein the stacking direction of the multiple batteries is arranged parallel to the extension direction of at least some of the main lines.

[0028] According to a fourth aspect of the present application, an electrical device is provided. Specifically, the electrical device includes an electrical load and a battery pack as described above, wherein the battery pack is electrically connected to the electrical load to supply power. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A schematic diagram of a liquid inlet pipeline structure according to an embodiment of the present application;

[0031] Figure 2 This is a schematic structural diagram of a liquid cooling device according to an embodiment of the present application;

[0032] Figure 3 This is a schematic diagram of the structure of another liquid cooling device according to an embodiment of the present application;

[0033] Figure 4 It is an exploded schematic diagram of a battery and a liquid cooling plate in a battery pack according to an embodiment of the present application;

[0034] Figure 5 This is a schematic diagram of the structure of the electrical equipment according to an embodiment of the present application.

[0035] Among them, the reference numerals in the figure are:

[0036] 100. Liquid inlet pipeline structure;

[0037] 10. Main road; 11. Main section;

[0038] 20. Branch pipe;

[0039] 30. Connector component; 31. First connector end; 32. Second connector end; 33. Third connector end;

[0040] 200. Liquid cooling device;

[0041] 210, liquid cooling plate; 211, liquid inlet interface end;

[0042] 300, battery; 301, battery pack;

[0043] 310, box shell; 311, box body; 312, box cover; 313, accommodating space; 320, battery cell;

[0044] 400. Electrical equipment;

[0045] 410. Electrical load; 420. Vehicle frame; 430. Wheels. DETAILED DESCRIPTION

[0046] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0047] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0048] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the feature. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0049] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between 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.

[0050] At present, in order to meet the requirements of high endurance, electric vehicles generally use multiple batteries to form a battery pack, which stores electricity and supplies power, thereby storing a large amount of electricity to ensure high endurance. Among them, each battery of the electric vehicle is cooled and dissipated by liquid cooling. The liquid cooling method mainly uses the coolant in the liquid cooling plate to take away the heat generated by the battery during operation. One battery is equipped with a liquid cooling plate.

[0051] In the related art, in order to facilitate the flow regulation of the coolant in the liquid cooling plate, generally one liquid cooling plate is equipped with a corresponding liquid inlet pipe, so that the flow of the coolant in each liquid cooling plate can be adjusted separately, so that the flow of the coolant in each liquid cooling plate can be basically consistent, so as to achieve the purpose of uniform cooling and heat dissipation of each battery. However, this leads to an increase in the number of liquid inlet pipes, which not only takes up a large assembly space, but also leads to high costs due to the large number of liquid inlet pipes.

[0052] Based on the above considerations, the embodiment of the present application provides a liquid inlet pipeline structure, which can reduce the number of pipelines through an integrated design, thereby greatly saving assembly space and reducing pipeline costs. The liquid inlet pipeline structure is assembled to obtain a liquid cooling device, and the liquid cooling device is applied to a battery pack. The liquid cooling plate of the liquid cooling device dissipates heat and cools the battery, so that the charging and discharging operating temperature of the battery is always maintained normal. In addition, the battery pack is assembled to an electrical device to supply power to the electrical load of the electrical device.

[0053] like Figure 1 As shown, the liquid inlet pipeline structure 100 provided by the embodiment of the present application includes a main pipeline 10 and a plurality of branch pipes 20. The main pipeline 10 is used to inlet liquid and transport coolant. The main pipeline 10 includes a plurality of main pipe sections 11 connected in sequence. The plurality of branch pipes 20 are used to divert and transport the coolant in the main pipeline 10 to the corresponding device to be cooled for heat dissipation and temperature reduction. A branch pipe 20 is connected between any two adjacent main pipeline sections 11. Among them, along the flow direction of the coolant in the main pipeline 10, the average inner diameter of any two adjacent main pipeline sections 11 is gradually reduced.

[0054] The liquid inlet pipeline structure 100 provided by the embodiment of the present application is used to transport the coolant to the device to be cooled for heat dissipation and cooling. The liquid inlet pipeline structure 100 of the present application is designed by an integrated design method to include a main pipeline 10 including multiple main sections 11 and multiple branch pipes 20, and any two adjacent main sections 11 are connected to each other with a branch pipe 20, and each branch pipe 20 diverts the coolant in the main pipeline 10 to the corresponding device to be cooled, thereby achieving heat dissipation and cooling. Compared with the related art, the liquid inlet pipeline structure 100 of the present application integrates multiple liquid inlet pipes into a main pipeline 10, and then uses each branch pipe 20 to divert the coolant in the main pipeline 10 to the device to be cooled for heat dissipation and cooling. In this way, the number of pipelines can be reduced, thereby greatly saving the assembly space used to assemble the liquid inlet pipeline structure 100, which is very beneficial for limited assembly space, and the number of pipelines is reduced, which also reduces the pipeline cost. Moreover, in the liquid inlet pipeline structure 100 of the present application, along the flow direction of the coolant in the main pipeline 10, the average inner diameters of any two adjacent main pipeline sections 11 are gradually reduced, so that the coolant in the main pipeline 10 flows faster as it flows further back on the flow path, thereby making the flow rate of the coolant flowing into each branch pipe 20 basically consistent, that is, the flow rate of the coolant flowing to each device to be cooled is basically consistent, so that each device to be cooled can dissipate heat and cool down evenly.

[0055] In some embodiments of the present application, Figure 1 As shown, along the flow direction of the coolant in the main pipe 10, the inner diameter of at least one main pipe section 11 is gradually reduced, that is, the pipe channel of at least one main pipe section 11 is a conical channel. In addition, the average inner diameter of the main pipe section 11 located upstream of any two adjacent main pipe sections 11 is greater than the average inner diameter of the main pipe section 11 located downstream, so that the coolant in the main pipe 10 flows faster as it flows further back on the flow path of the main pipe 10, so that the flow rate of the coolant flowing into each branch pipe 20 can be kept basically consistent.

[0056] Specifically, in some embodiments of the present application, the inner diameter of each main pipe section 11 is tapered, that is, the pipe channel of each main pipe section 11 is a conical channel. Moreover, the average inner diameter of the upstream main pipe section 11 of any two adjacent main pipe sections 11 is greater than the average inner diameter of the downstream main pipe section 11. In this way, the coolant in the main pipe 10 flows faster as it flows further back on the flow path of the main pipe 10, so that the flow rate of the coolant flowing into each branch pipe 20 can be kept basically consistent, so that each device to be cooled can dissipate heat and cool down evenly.

[0057] Alternatively, in some other embodiments of the present application, the inner diameters of several main pipe sections 11 are tapered (the pipe passages of this part of the main pipe sections 11 are conical passages), and the pipe passages of the remaining main pipe sections 11 are pipe passages with constant inner diameters (the pipe passages of this part of the main pipe sections 11 are straight tube passages). Moreover, the average inner diameter of the upstream main pipe section 11 of any two adjacent main pipe sections 11 is greater than the average inner diameter of the downstream main pipe section 11. In this way, the coolant in the main pipe 10 flows faster as it flows further back on the flow path of the main pipe 10, so that the flow rate of the coolant flowing into each branch pipe 20 can be kept basically consistent, so that each device to be cooled can dissipate heat and cool down evenly.

[0058] In some embodiments of the present application, Figure 1 As shown, the pipe passages of each main pipe section 11 are pipe passages with constant inner diameters, that is, the pipe passages of each main pipe section 11 are straight tube-shaped passages. Along the flow direction of the coolant in the main pipe 10, the inner diameter of the pipe section 11 located upstream of any two adjacent main pipe sections 11 is larger than the inner diameter of the pipe section 11 located downstream, so that the coolant in the main pipe 10 flows faster as it flows further back on the flow path of the main pipe 10, so that the flow rate of the coolant flowing into each branch pipe 20 can be kept basically consistent, so that each device to be cooled can dissipate heat and cool down evenly.

[0059] In some embodiments of the present application, Figure 1 As shown, along the flow direction of the coolant in the main line 10, the inner diameters of any two adjacent branch pipes 20 are gradually reduced. In this way, when the coolant flows from the main line 10 into each branch pipe 20, along the flow direction of the coolant in the main line 10, the flow rate of the coolant flowing into the branch pipe 20 is faster as the coolant flows further back along the flow path of the main line 10, so that the flow rate of the coolant flowing into each branch pipe 20 can be kept basically consistent, and then the flow rate of the coolant flowing to the device to be cooled can be kept basically consistent, so that each device to be cooled can dissipate heat and cool down evenly.

[0060] In some embodiments of the present application, Figure 1As shown, the inner diameter of at least one branch pipe 20 is gradually reduced along the flow direction of the coolant in the branch pipe 20, that is, the pipe channel of at least one branch pipe 20 is a conical channel. Moreover, along the flow direction of the coolant in the main pipe 10, the average inner diameter of the branch pipe 20 located upstream of any two adjacent branch pipes 20 is greater than the average inner diameter of the branch pipe 20 located downstream. In this way, when the coolant flows from the main pipe 10 into each branch pipe 20, along the flow direction of the coolant in the main pipe 10, the flow rate of the coolant flowing into the branch pipe 20 is faster the further it flows along the flow path of the coolant in the main pipe 10, so that the flow rate of the coolant flowing into each branch pipe 20 can be kept basically consistent, and then the flow rate of the coolant flowing to the device to be cooled can be kept basically consistent, so that each device to be cooled can dissipate heat and cool down evenly.

[0061] Specifically, in some embodiments of the present application, the inner diameter of each branch pipe 20 is tapered, that is, the pipe channel of each branch pipe 20 is a conical channel. Moreover, along the flow direction of the coolant in the main line 10, the average inner diameter of the branch pipe 20 located upstream of any two adjacent branch pipes 20 is greater than the average inner diameter of the branch pipe 20 located downstream. In this way, when the coolant flows from the main line 10 into each branch pipe 20, along the flow direction of the coolant in the main line 10, the flow rate of the coolant flowing into the branch pipe 20 is faster the further the coolant flows on the flow path of the main line 10, so that the flow rate of the coolant flowing into each branch pipe 20 can be kept basically consistent, and then the flow rate of the coolant flowing to the device to be cooled can be kept basically consistent, so that each device to be cooled can dissipate heat and cool down evenly.

[0062] Alternatively, in some other embodiments of the present application, the inner diameters of several branch pipes 20 are tapered (the pipe passages of some branch pipes 20 are conical), and the pipe passages of the remaining branch pipes 20 are pipe passages with constant inner diameters (the pipe passages of some branch pipes 20 are straight tube passages). Moreover, along the flow direction of the coolant in the main pipe 10, the average inner diameter of the branch pipe 20 located upstream of any two adjacent branch pipes 20 is greater than the average inner diameter of the branch pipe 20 located downstream. In this way, when the coolant flows from the main pipe 10 into each branch pipe 20, along the flow direction of the coolant in the main pipe 10, the flow rate of the coolant flowing into the branch pipe 20 is faster the further it flows along the flow path of the coolant in the main pipe 10, so that the flow rate of the coolant flowing into each branch pipe 20 can be kept basically consistent, and then the flow rate of the coolant flowing to the device to be cooled can be kept basically consistent, so that each device to be cooled can dissipate heat and cool down evenly.

[0063] In some embodiments of the present application, Figure 1As shown, the pipe channels of each branch pipe 20 are pipe channels with constant inner diameters, that is, the pipe channels of each branch pipe 20 are straight tube channels. Along the flow direction of the coolant in the main line 10, the inner diameter of the branch pipe 20 located upstream of any two adjacent branch pipes 20 is larger than the inner diameter of the branch pipe 20 located downstream. In this way, when the coolant flows from the main line 10 into each branch pipe 20, along the flow direction of the coolant in the main line 10, the flow rate of the coolant flowing into the branch pipe 20 is faster the further the coolant flows along the flow path of the main line 10, so that the flow rate of the coolant flowing into each branch pipe 20 can be kept basically consistent, and then the flow rate of the coolant flowing to the device to be cooled can be kept basically consistent, so that each device to be cooled can dissipate heat and cool down evenly.

[0064] The "average tube inner diameter" mentioned in the present application means that when the tube channel of the main pipeline 10 is a conical channel, the average tube inner diameter of the tube channel of the main pipeline 10 is equal to the average value of the sum of the inner diameter of the channel opening of the large end and the inner diameter of the channel opening of the small end. At this time, the tube inner diameter at the midpoint of the tube channel of the main pipeline 10 is the average tube inner diameter; when the tube channel of the main pipeline 10 is a straight cylindrical channel, the inner diameter of the tube channel of the main pipeline 10 remains unchanged, and the tube inner diameter of the main pipeline 10 is equal to the average value of the sum of the inner diameter of the channel opening of the large end and the inner diameter of the channel opening of the small end. The inner diameter of the channel is the average inner diameter of the tube; when the tube channel of the branch tube 20 is a conical channel, the average inner diameter of the tube channel of the branch tube 20 is equal to the average value of the sum of the inner diameter of the channel opening of the large end and the inner diameter of the channel opening of the small end. At this time, the inner diameter of the tube at the midpoint of the tube channel of the branch tube 20 is the average inner diameter of the tube; when the tube channel of the branch tube 20 is a straight cylindrical channel, the inner diameter of the tube channel of the branch tube 20 remains unchanged, and the inner diameter of the tube channel of the branch tube 20 is the average inner diameter of the tube.

[0065] In some embodiments of the present application, Figure 1 As shown, the liquid inlet pipeline structure 100 also includes a plurality of joint components 30, each branch pipe 20 is connected to the main pipe 10 through a corresponding joint component 30, and each main pipe section 11 is a separate component independent of each other, and two adjacent main pipe sections 11 are connected through the joint component 30. The joint component 30 is provided with a first joint end 31, a second joint end 32 and a third joint end 33 that are interconnected, the first joint end 31 and the second joint end 32 are respectively connected to two adjacent main pipe sections 11 in a one-to-one correspondence, and the third joint end 33 is connected to the corresponding branch pipe 20. The two adjacent main pipe sections 11 and the corresponding branch pipe 20 are connected through a joint component 30, which helps to improve the assembly efficiency between the two adjacent main pipe sections 11 and the assembly efficiency between the main pipe section 11 and the corresponding branch pipe 20, so as to quickly complete the assembly of the liquid inlet pipeline structure 100.

[0066] In other embodiments of the present application, two adjacent main pipe sections 11 and a corresponding branch pipe 20 can also be connected by welding. Further, in this embodiment, multiple main pipe sections 11 are integrally formed into a main pipe 10, wherein the main pipe 10 includes but is not limited to an extruded seamless pipe. Multiple connection holes are provided on the main pipe 10, and each branch pipe 20 is welded to the multiple connection holes one by one.

[0067] The diameter of the channel opening of the first joint end 31 may be greater than the diameter of the channel opening of the second joint end 32. That is, when the pipe passage of the upstream main pipe section 11 of the two adjacent main pipe sections 11 connected to the same joint component 30 is a conical passage and the downstream main pipe section 11 is a straight tube passage, the minimum inner diameter of the pipe passage of the upstream main pipe section 11 may be greater than the inner diameter of the pipe passage of the downstream main pipe section 11; or, when the pipe passages of the two adjacent main pipe sections 11 connected to the same joint component 30 are both conical passages, the minimum inner diameter of the pipe passage of the upstream main pipe section 11 may be greater than the maximum inner diameter of the pipe passage of the downstream main pipe section 11; or, when the pipe passages of the two adjacent main pipe sections 11 connected to the same joint component 30 are both straight tube passages, the inner diameter of the pipe passage of the upstream main pipe section 11 is greater than the inner diameter of the pipe passage of the downstream main pipe section 11. Furthermore, along the flow direction of the coolant in the main line 10, the channel opening diameter of the third joint end 33 of the upstream joint component 30 of any two adjacent joint components 30 is larger than the channel opening diameter of the third joint end 33 of the downstream joint component 30. In this way, the coolant in the main line 10 flows faster as it flows further back on the flow path of the main line 10, so that the flow rate of the coolant flowing into each branch pipe 20 can be kept basically consistent, so that each device to be cooled can dissipate heat and cool down evenly.

[0068] In other embodiments of the present application, the channel opening diameter of the first joint end 31 may be equal to the channel opening diameter of the second joint end 32. In this embodiment, the pipe passages of the two adjacent main pipe sections 11 connected to the same joint component 30 are conical channels, and the minimum inner diameter of the pipe passage of the upstream main pipe section 11 may be equal to the maximum inner diameter of the pipe passage of the downstream main pipe section 11. Moreover, along the flow direction of the coolant in the main pipe 10, the channel opening diameter of the third joint end 33 of the upstream joint component 30 of any two adjacent joint components 30 is greater than the channel opening diameter of the third joint end 33 of the downstream joint component 30. In this way, the coolant in the main pipe 10 flows faster as it flows further back on the flow path of the main pipe 10, so that the flow rate of the coolant flowing into each branch pipe 20 can be kept basically consistent, so that each device to be cooled can dissipate heat and cool down evenly.

[0069] Furthermore, in some embodiments of the present application, in any joint component 30 , the channel opening diameter of the first joint end 31 and the channel opening diameter of the second joint end 32 are both greater than or equal to the channel opening diameter of the third joint end 33 . Wherein: when the pipe channels of two adjacent main pipe sections 11 and the pipe channel of one branch pipe 20 connected to the same joint component 30 are all conical channels, the channel opening diameter of the first joint end 31, the channel opening diameter of the second joint end 32 and the channel opening diameter of the third joint end 33 may be equal. At this time, the average inner diameter of the pipe channel of the upstream main pipe section 11 is greater than the average inner diameter of the pipe channel of the downstream main pipe section 11, and the average inner diameter of the pipe channel of the downstream main pipe section 11 is greater than the average inner diameter of the pipe channel of the branch pipe 20; or, when the pipe channels of two adjacent main pipe sections 11 and the pipe channel of one branch pipe 20 connected to the same joint component 30 are all conical channels, the channel opening diameter of the first joint end 31 and the channel opening diameter of the second joint end 32 are greater than the channel opening diameter of the third joint end 33, and the upstream The average inner diameter of the pipe channel of the main pipe section 11 located upstream is greater than the average inner diameter of the pipe channel of the main pipe section 11 located downstream, and the average inner diameter of the pipe channel of the main pipe section 11 located downstream is greater than the average inner diameter of the pipe channel of the branch pipe 20; or, in two adjacent main pipe sections 11 and one branch pipe 20 connected to the same joint component 30, when the pipe channels of the two adjacent main pipe sections 11 are conical channels or straight cylindrical channels, and the branch pipe 20 is a conical channel or a straight cylindrical channel, the channel opening diameter of the first joint end 31 and the channel opening diameter of the second joint end 32 are both greater than the channel opening diameter of the third joint end 33, and the average inner diameter of the pipe channel of the main pipe section 11 located upstream is greater than the average inner diameter of the pipe channel of the main pipe section 11 located downstream, and the average inner diameter of the pipe channel of the main pipe section 11 located downstream is greater than the average inner diameter of the pipe channel of the branch pipe 20. In this way, when the coolant is diverted to the downstream main pipe section 11 and the corresponding branch pipe 20 at each joint component 30, a smaller portion of the coolant is diverted to the branch pipe 20, while a larger portion of the coolant is diverted to the downstream main pipe section 11. On the basis of ensuring that the flow rate of the coolant flowing into each branch pipe 20 is basically the same, it can be ensured that a sufficient flow rate of coolant flows to the downstream main pipe section 11, so that the flow rate of the coolant flowing to each device to be cooled is basically the same, so that each device to be cooled can dissipate heat and cool down evenly.

[0070] The liquid inlet pipeline structure 100 of the embodiment of the present application adopts the following design method:

[0071] The pipe passages of each main pipe section 11 and each branch pipe 20 are straight-cylindrical passages, and two adjacent main pipe sections 11 and a corresponding branch pipe 20 are connected by a joint component 30. In the same joint component 30: the first joint end 31 is connected to the main pipe section 11 located upstream, and the passage opening diameter of the first joint end 31 is equal to the inner diameter of the pipe passage of the main pipe section 11 located upstream; the second joint end 32 is connected to the main pipe section 11 located downstream, and the passage opening diameter of the second joint end 32 is equal to the inner diameter of the pipe passage of the main pipe section 11 located downstream; the third joint end 33 is connected to the corresponding branch pipe 20, and the passage opening diameter of the third joint end 33 is equal to the inner diameter of the pipe passage of the branch pipe 20. In the same joint component 30, the passage opening diameter of the first joint end 31 and the passage opening diameter of the second joint end 32 are both larger than the passage opening diameter of the third joint end 33. Furthermore, in the liquid inlet pipeline structure 100, the second joint end 32 of the last joint component 30 in the coolant flow direction along the main pipeline 10 is set to a blocked state, that is, the last joint component 30 has only the first joint end 31 connected to the corresponding main pipe section 11, and the third joint end 33 connected to the corresponding branch pipe 20.

[0072] According to the second aspect of the present application, the embodiment of the present application provides a liquid cooling device 200, such as Figure 2 and Figure 3 The liquid cooling device 200 includes the liquid inlet pipeline structure 100 as mentioned above.

[0073] Compared with the related art, the liquid inlet pipeline structure 100 used in the liquid cooling device 200 of the present application integrates multiple liquid inlet pipes into a main pipeline 10, and then uses each branch pipe 20 to divert the coolant in the main pipeline 10 to the device to be cooled for heat dissipation and cooling. In this way, the number of pipelines can be reduced, thereby greatly saving the assembly space used to assemble the liquid inlet pipeline structure 100, which is very beneficial for limited assembly space. Moreover, in the liquid inlet pipeline structure 100 used in the liquid cooling device 200 of the present application, along the flow direction of the coolant in the main pipeline 10, the average inner diameter of any two adjacent main sections 11 is gradually reduced, so that the coolant in the main pipeline 10 flows faster as it flows further back on the flow path, so that the flow rate of the coolant flowing into each branch pipe 20 can be kept basically consistent, that is, the flow rate of the coolant flowing to each device to be cooled is basically consistent, so that each device to be cooled can dissipate heat and cool evenly.

[0074] In some embodiments of the present application, Figure 2 and Figure 3As shown, the liquid cooling device 200 also includes a plurality of liquid cooling plates 210, and the liquid cooling plates 210 are provided with liquid inlet interface ends 211. The liquid inlet interface ends 211 of each liquid cooling plate 210 are connected to each branch pipe 20 in a one-to-one correspondence, and the liquid cooling plates 210 are used to be arranged in contact with the device to be cooled in a one-to-one correspondence. In the liquid cooling device 200, the liquid inlet pipeline structure 100 diverts the coolant in the main pipeline 10 to the corresponding liquid cooling plates 210 through each branch pipe 20, and heat is transferred to the coolant through the contact between the liquid cooling plates 210 and the device to be cooled for heat conduction. The coolant of the liquid cooling plate 210 takes away the heat during the continuous flow process, thereby achieving heat dissipation and cooling of the device to be cooled, and the liquid cooling effect is obvious, which prevents the working temperature of the device to be cooled from being too high and affecting normal operation.

[0075] According to the third aspect of the present application, the embodiment of the present application provides a battery pack 301. The battery pack 301 includes a plurality of batteries 300 and at least one liquid cooling device 200 as described above, and a plurality of liquid cooling plates 210 are arranged in a one-to-one correspondence with the plurality of batteries 300. The liquid inlet pipeline structure 100 diverts the coolant in the main pipeline 10 to the corresponding liquid cooling plates 210 through each branch pipe 20, and conducts heat through the contact between the liquid cooling plate 210 and the battery 300, thereby transferring the heat to the coolant. The coolant of the liquid cooling plate 210 takes away the heat during the continuous flow process, thereby achieving heat dissipation and cooling of the battery 300 during the charging and discharging process. The liquid cooling effect is obvious, which prevents the operating temperature of the battery 300 from being too high during the charging and discharging process and affecting normal operation.

[0076] In some embodiments of the present application, Figure 4 As shown, the battery 300 includes a box shell 310 and a battery cell 320. The box shell 310 is formed with a receiving space 313. The liquid cooling plate 210 is installed at the bottom of the receiving space 313. The battery cell 320 is installed in the receiving space 313 and is arranged in contact with the liquid cooling plate 210. The corresponding branch pipe 20 passes through the box shell 310 and is connected to the liquid inlet interface end 211 of the liquid cooling plate 210. In this embodiment, the liquid cooling plate 210 is directly in contact with the battery cell 320, so that the heat generated by the battery cell 320 during the charging and discharging process can be directly and quickly transferred to the liquid cooling plate 210, and then the coolant of the liquid cooling plate 210 takes away the heat during the continuous flow process, thereby achieving heat dissipation and cooling of the battery 300 during the charging and discharging process. The liquid cooling effect is obvious, which prevents the working temperature of the battery 300 from being too high during the charging and discharging process and affecting normal operation.

[0077] In some embodiments of the present application, Figure 3 and Figure 4As shown, at least some of the batteries 300 are laid out in a row, and the liquid inlet interface ends 211 of the liquid cooling plates 210 in the batteries 300 laid out in a row are all located on the same side, wherein the arrangement direction of the batteries 300 laid out in a row is arranged parallel to the extension direction of at least some of the main lines 10. Take all the batteries 300 laid out in a row as an example for explanation, at this time, the main line 10 extends in a straight line in the horizontal direction, and each branch pipe 20 is located on the same side of the main line 10, and each branch pipe 20 is at the same level and extends in a straight line in the horizontal direction. The coolant in the main line 10 is diverted and transported to the corresponding liquid cooling plates 210 through each branch pipe 20, and heat conduction is carried out through the liquid cooling plate 210 and the battery 300. Heat is transferred to the coolant. The coolant of the liquid cooling plate 210 takes away the heat during the continuous flow process, thereby achieving heat dissipation and cooling of the battery 300 during the charging and discharging process.

[0078] In some embodiments of the present application, Figure 2 and Figure 4 As shown, at least some of the batteries 300 are stacked in sequence, and the liquid inlet interface ends 211 of the liquid cooling plates 210 in the stacked batteries 300 are all located on the same side, wherein the stacking direction of the multiple batteries 300 is arranged parallel to the extension direction of at least part of the main line 10. Taking all the batteries 300 stacked in sequence as an example, at this time, the main line 10 extends in a straight line in the vertical direction, and each branch pipe 20 is located on the same side of the main line 10, and each branch pipe 20 is at the same level and extends in a straight line in the horizontal direction. The coolant in the main line 10 is diverted and transported to the corresponding liquid cooling plates 210 through each branch pipe 20, and heat conduction is carried out through the contact between the liquid cooling plate 210 and the battery 300, thereby transferring heat to the coolant. The coolant of the liquid cooling plate 210 takes away the heat during the continuous flow process, thereby achieving heat dissipation and cooling of the battery 300 during the charging and discharging process.

[0079] According to the fourth aspect of the present application, the embodiment of the present application provides an electric device 400, such as Figure 5 The electrical device 400 includes an electrical load 410 and the aforementioned battery pack 301, and the battery pack 301 is electrically connected to the electrical load to supply power.

[0080] The electric devices 400 include but are not limited to mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys may include but are not limited to fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft may include but are not limited to airplanes, rockets, space shuttles, and spacecraft, etc.

[0081] In the embodiment of the present application, the electric device 400 is an electric vehicle, such as Figure 5 As shown, the battery pack 301 is installed on the frame 420 of the electric vehicle. The battery pack 301 provided by the embodiment of the present application is used to power the driving motor (i.e., the electric load 410) of the electric vehicle, and the driving motor drives the wheel 430 to rotate, so that the electric vehicle can travel normally.

[0082] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A liquid inlet pipeline structure, characterized in that: include: A main pipe, used for taking in liquid and conveying cooling liquid, the main pipe comprising a plurality of main pipe sections connected in sequence; A plurality of branch pipes, used for diverting and transporting the coolant in the main pipe to the corresponding device to be cooled to dissipate heat and reduce temperature, and one branch pipe is connected between any two adjacent main pipe sections; Wherein, along the flow direction of the coolant in the main pipe, the average inner diameters of any two adjacent main pipe sections are gradually reduced.

2. The liquid inlet pipeline structure according to claim 1, characterized in that: Along the flow direction of the coolant in the main pipe, the inner diameter of at least one of the main pipe sections is gradually reduced, and the average inner diameter of the main pipe section located upstream of any two adjacent main pipe sections is greater than the average inner diameter of the main pipe section located downstream.

3. The liquid inlet pipeline structure according to claim 1, characterized in that: The pipe channels of each of the main pipe sections are pipe channels with constant inner diameters. Along the flow direction of the coolant in the main pipe, the inner diameter of the upstream main pipe section of any two adjacent main pipe sections is greater than the inner diameter of the downstream main pipe section.

4. The liquid inlet pipeline structure according to any one of claims 1 to 3, characterized in that: Along the flow direction of the coolant in the main pipe, the inner diameters of any two adjacent branch pipes are gradually reduced.

5. The liquid inlet pipeline structure according to claim 4, characterized in that: The inner diameter of at least one of the branch pipes is gradually reduced along the flow direction of the coolant in the branch pipe, and along the flow direction of the coolant in the main pipe, the average inner diameter of the upstream branch pipe of any two adjacent branch pipes is greater than the average inner diameter of the downstream branch pipe.

6. The liquid inlet pipeline structure according to claim 4, characterized in that: The pipe channels of each branch pipe have constant inner diameters. Along the flow direction of the coolant in the main pipe, the inner diameter of the upstream branch pipe of any two adjacent branch pipes is greater than the inner diameter of the downstream branch pipe.

7. The liquid inlet pipeline structure according to claim 6, characterized in that: The liquid inlet pipeline structure also includes a plurality of joint components, wherein the joint components are provided with a first joint end, a second joint end and a third joint end which are interconnected, wherein the first joint end and the second joint end are respectively connected to two adjacent main pipe sections in a one-to-one correspondence, and the third joint end is connected to the corresponding branch pipe, wherein the channel opening diameter of the first joint end is greater than or equal to the channel opening diameter of the second joint end, and, along the flow direction of the coolant in the main pipe, the channel opening diameter of the third joint end of the upstream joint component of any two adjacent joint components is greater than the channel opening diameter of the third joint end of the downstream joint component.

8. The liquid inlet pipeline structure according to claim 7, characterized in that: In any of the joint components, the diameter of the passage opening of the first joint end and the diameter of the passage opening of the second joint end are both greater than or equal to the diameter of the passage opening of the third joint end.

9. The liquid inlet pipeline structure according to claim 6, characterized in that: The plurality of main pipe sections are integrally formed into the main pipe.

10. A liquid cooling device, characterized in that: It comprises a liquid inlet pipeline structure as described in any one of claims 1 to 9.

11. The liquid cooling device according to claim 10, characterized in that: The liquid cooling device also includes a plurality of liquid cooling plates, each of which is provided with a liquid inlet interface end, and each of the liquid cooling plates is connected to each of the branch pipes in a one-to-one correspondence, and the liquid cooling plates are used to be arranged in contact with the device to be cooled in a one-to-one correspondence.

12. A battery pack, characterized in that: include: Multiple batteries; as well as At least one liquid cooling device as described in any one of claims 10-11, wherein a plurality of the liquid cooling plates are arranged in a one-to-one correspondence with a plurality of the batteries.

13. The battery pack according to claim 12, characterized in that: The battery includes a box shell and a battery cell. The box shell forms a accommodating space. The liquid cooling plate is installed at the bottom of the accommodating space. The battery cell is installed in the accommodating space and is arranged in contact with the liquid cooling plate. The corresponding branch pipe passes through the box shell and is connected to the liquid inlet interface end of the liquid cooling plate.

14. The battery pack according to claim 12 or 13, characterized in that: At least some of the batteries are laid out in a row in sequence, and among the batteries laid out in a row, the liquid inlet interface ends of the liquid cooling plate are all located on the same side, wherein the arrangement direction of the batteries laid out in a row is parallel to the extension direction of at least some of the main lines.

15. The battery pack according to claim 14, characterized in that: At least part of the batteries are stacked in sequence, and the liquid inlet interface ends of the liquid cooling plates in the stacked batteries are all located on the same side, wherein the stacking direction of the multiple batteries is parallel to the extension direction of at least part of the main pipeline.

16. An electrical equipment, characterized in that: It comprises an electrical load and a battery pack as claimed in any one of claims 12 to 15, wherein the battery pack is electrically connected to the electrical load to supply power.

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