Circulation pipeline for thermal management system of engineering vehicle

Abstract

The utility model relates to the technical field of engineering vehicles, and discloses a circulation pipeline for a heat management system of an engineering vehicle, which comprises a water inlet pipeline and a water outlet pipeline, the water inlet pipeline comprises a water inlet pipe and a water distribution pipe with the pipe diameter smaller than that of the water inlet pipe, and the two ends of the water inlet pipe communicate with a heat exchange device and the water distribution pipe correspondingly; the water distribution pipe is communicated with a plurality of water inlet connectors, each water inlet connector is communicated with the water inlet end of the corresponding battery pack, the water outlet pipeline comprises a gathering pipe and a water outlet pipe with the pipe diameter larger than that of the gathering pipe, the two ends of the water outlet pipe are communicated with the heat exchange device and the gathering pipe respectively, and the gathering pipe is communicated with a plurality of water outlet connectors. Each water outlet connector is communicated with the water outlet end of the corresponding battery pack, so that the flow velocity of the cooling medium is accelerated after the cooling medium enters the water distribution pipe through the water inlet pipe, the situation that the flow velocity of the cooling medium is directly reduced is avoided, the flow velocity of the cooling medium entering the battery pack is ensured, and the service life of the battery pack is prolonged. And the cooling or heating efficiency of the battery pack is further ensured.

Description

Technical Field

[0001] The present application belongs to the technical field of engineering vehicles, and in particular relates to a circulation pipeline for a thermal management system of an engineering vehicle. Background Art

[0002] With the country's vigorous promotion and support for new energy, electric and hybrid engineering vehicles are gradually entering the market. In order to increase the cruising range of engineering vehicles, existing electric and hybrid engineering vehicles are equipped with a thermal management system to cool or heat the battery pack, so that the battery pack works at a relatively good temperature, so as to achieve the effect of increasing the cruising range of electric or hybrid engineering vehicles.

[0003] In the related art, the thermal management system of an engineering vehicle includes a water tank, a water pump, a heater, a radiator and a compressor. When cooling the battery pack, the water pump pumps the cooling medium in the water tank into the battery pack via the radiator, and then the cooling medium takes away the heat of the battery pack to achieve the effect of cooling the battery; when heating the battery pack, the water pump heats the cooling medium in the water tank through the heater and pumps it into the battery pack, so that the heat of the cooling medium is transferred to the battery pack to achieve heating of the battery pack. However, due to the heavy weight of the engineering vehicle and the heavy load of the engineering vehicle, it is necessary to equip the engineering vehicle with multiple battery packs, each of which is provided with a water inlet pipe and a water outlet pipe, and the water inlet pipes of the multiple battery packs are connected to the same water inlet pipeline, which results in a lower flow rate of the coolant entering the battery pack, thereby affecting the cooling or heating efficiency of the battery pack. Utility Model Content

[0004] The present application provides a circulation pipeline for a thermal management system of an engineering vehicle to ensure the flow rate of coolant entering the battery pack, thereby ensuring the cooling or heating efficiency of the battery pack.

[0005] The technical solution adopted in this application is:

[0006] A circulation pipeline for a thermal management system of an engineering vehicle comprises a water inlet pipeline and a water outlet pipeline, wherein the water inlet pipeline comprises a water inlet pipe and a water branch pipe having a smaller diameter than the water inlet pipe, wherein both ends of the water inlet pipe are respectively connected to a heat exchange device and the water branch pipe, wherein the water branch pipe is connected with a plurality of water inlet connectors, each of which is connected to a water inlet end of a corresponding battery pack, and the water outlet pipeline comprises a collecting pipe and a water outlet pipe having a larger diameter than the collecting pipe, wherein both ends of the water outlet pipe are respectively connected to the heat exchange device and the collecting pipe, wherein the collecting pipe is connected with a plurality of water outlet connectors, each of which is connected to a water outlet end of a corresponding battery pack.

[0007] By adopting the above technical solution, when the battery pack is cooled or heated, the cooling medium enters the water distribution pipe through the water inlet pipe, and the cooling medium entering the water distribution pipe enters the interior of the battery pack through the water inlet connector, so that the cooling medium flows in the battery pack along the flow channel inside the battery pack to transfer heat with the battery pack, thereby realizing cooling or heating of the battery pack, and the cooling medium that transfers heat with the battery pack enters the collecting pipe through the water outlet connector and enters the water outlet pipe through the collecting pipe.

[0008] Since the diameter of the water distribution pipe is smaller than that of the water inlet pipe, the flow rate of the cooling medium will be accelerated after the cooling medium enters the water distribution pipe through the water inlet pipe, and the flow rate of the cooling medium will be reduced after being diverted through multiple water inlet joints, thereby avoiding the direct reduction of the flow rate of the cooling medium, thereby ensuring the flow rate of the cooling medium entering the battery pack, and further ensuring the cooling or heating efficiency of the battery pack; at the same time, compared with using pipes with larger diameters for all water inlet pipelines, the cost of the circulation pipeline is also reduced.

[0009] Because the diameter of the water outlet pipe is larger than that of the collecting pipe, the flow rate of the cooling medium can be kept as consistent as possible to avoid the water outlet pipe from being deflated under the action of the water pump, thereby ensuring the normal operation of the circulation pipeline. In addition, compared with using pipes with larger diameters for all water outlet pipes, the cost of the circulation pipeline is also reduced.

[0010] Optionally, the water diversion pipe includes a first water diversion section and a second water diversion section whose diameter is smaller than that of the first water diversion section, the first water diversion section is connected to the water inlet pipe, and the second water diversion section is connected to the plurality of water inlet connectors.

[0011] By adopting the above technical solution, since the water diversion pipe includes a first water diversion section and a second water diversion section, and the diameter of the second water diversion section is smaller than the diameter of the first water diversion section, after the cooling medium flows through the first water diversion section to the second water diversion section, the flow rate of the cooling medium will increase again, and then the cooling medium will be accelerated twice before entering the battery pack, so as to increase the flow rate of the cooling medium in the battery pack, thereby further increasing the cooling or heating efficiency of the battery pack.

[0012] Optionally, a plurality of battery packs are arranged in sequence along a vertical direction, and the second water-dividing section is extended along the vertical direction.

[0013] By adopting the above technical solution, since the second water diversion section is extended in the vertical direction, the cooling medium can flow into the battery pack under the action of its own gravity, so as to reduce the load of the water pump, thereby reducing the power of the water pump, so as to achieve energy saving effect, thereby reducing the user's use cost, and at the same time, the volume of the water pump can be reduced to achieve the effect of facilitating the arrangement of the circulation device.

[0014] Optionally, the collecting pipe includes a first collecting section and a second collecting section with a diameter larger than that of the first collecting section, the first collecting section is connected to the plurality of water outlet connectors, and the second collecting section is connected to the water outlet pipe.

[0015] By adopting the above technical solution, since the collecting pipe includes a first collecting section and a second collecting section with a diameter larger than the first collecting section, the cost of the circulation pipeline is further reduced compared with a solution in which the entire collecting pipe has a larger diameter.

[0016] Optionally, two of the water distribution pipes and the water collection pipes are provided, and the water inlet connector and the water outlet connector are provided at both ends of each battery pack. The two water distribution pipes are respectively connected to the water inlet connectors located at both ends of the battery pack, and the two collection pipes are respectively connected to the water outlet connectors located at both ends of the battery pack.

[0017] By adopting the above technical solution, since there are two water distribution pipes and two collecting pipes, and each battery pack is provided with a water inlet connector and a water outlet connector at both ends, the cooling medium enters the interior of the battery pack from both ends of the battery pack through the two water distribution pipes, and then flows out from both ends of the battery pack through the water outlet connectors, so that the temperature at both ends of the battery pack can be kept as consistent as possible, so as to further increase the cooling or heating effect of the battery pack.

[0018] Optionally, the two water distribution pipes are connected to the water inlet pipe via a first three-way joint, and the first three-way joint is fixedly connected to the engineering vehicle;

[0019] And / or, the two collecting pipes are connected to the water outlet pipe via a second three-way joint, and the second three-way joint is fixedly connected to the engineering vehicle.

[0020] By adopting the above technical solution, since the two water distribution pipes are connected to the water inlet pipe through the first three-way joint, and the first three-way joint is fixedly connected to the engineering vehicle, the connection stability between the water distribution pipes and the water inlet pipes is increased, and the situation where the stability of the connection between the water distribution pipes and the water inlet pipes is affected by poor operating conditions of the engineering vehicle is avoided, thereby reducing the failure rate of the circulation pipeline.

[0021] Since the two collecting pipes are connected to the water outlet pipe through the second three-way joint, and the second three-way joint is fixed to the engineering vehicle, the connection stability between the collecting pipe and the water inlet pipe is increased, avoiding the situation where the connection stability between the water distribution pipe and the water inlet pipe is affected by the poor operating conditions of the engineering vehicle, thereby reducing the failure rate of the circulation pipeline.

[0022] Optionally, the water distribution pipe includes a first water distribution section extending in a horizontal direction, and the collecting pipe includes a second collecting section extending in a horizontal direction, and the first water distribution section is located above the second collecting section.

[0023] By adopting the above technical solution, since the first water diversion section is located above the second aggregation section, the cooling medium can flow into the battery pack under the action of its own gravity, and can flow out of the battery pack and enter the second aggregation section under the action of its own gravity, so as to reduce the load of the water pump, thereby reducing the power of the water pump and reducing the energy consumption of the water pump, so as to achieve the effect of reducing the cost of use.

[0024] Optionally, the water inlet pipe has a water inlet port away from the water distribution pipe, and the water inlet port is located above the battery pack.

[0025] By adopting the above technical solution, since the water inlet port is located above the battery pack, the coolant can enter the battery pack through the water inlet pipe and the water distribution pipe under the action of its own gravity, so as to further reduce the load of the water pump, thereby further reducing the requirement for the water pump power, so that a smaller power water pump can be used to match the circulation pipeline, and at the same time reduce the energy consumption of cooling or heating the battery pack, so as to reduce the cost of cooling or heating the battery pack.

[0026] Optionally, it further comprises a first fixing member fixedly connected to the engineering vehicle, and the water inlet pipe is fixedly connected to the first fixing member;

[0027] And / or, it also includes a second fixing member fixedly connected to the engineering vehicle, and the water outlet pipe is fixedly connected to the second fixing member.

[0028] By adopting the above technical solution, since the first fixing member is fixedly connected to the engineering vehicle, the water inlet pipe is fixedly connected to the water inlet pipe, that is, the water inlet pipe is fixedly connected to the engineering vehicle through the first fixing member to increase the stability of the water inlet pipe, so as to avoid the situation where the water inlet pipe is easily damaged due to lack of restraint, thereby reducing the failure rate of the circulation pipeline and increasing the service life of the circulation pipeline.

[0029] Since the second fixing member is fixedly connected to the engineering vehicle, the water outlet pipe is fixedly connected to the water outlet pipe, that is, the water outlet pipe is fixedly connected to the engineering vehicle through the second fixing member to increase the stability of the water outlet pipe and avoid the situation where the water outlet pipe is easily damaged due to lack of restraint, thereby reducing the failure rate of the circulation pipeline and increasing the service life of the circulation pipeline.

[0030] Optionally, the flow areas of the multiple water inlet connectors are arranged to gradually increase from top to bottom.

[0031] By adopting the above technical solution, since the flow area of ​​multiple water inlet connectors is gradually increased from top to bottom, the amount of cooling medium entering the battery pack through the water distribution pipe can be kept as consistent as possible to ensure the uniformity of cooling or heating of multiple battery packs.

[0032] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0033] 1. The circulation pipeline in the present application includes a water inlet pipeline and a water outlet pipeline. The water inlet pipeline includes a water inlet pipe and a water branch pipe with a smaller diameter than the water inlet pipe. The two ends of the water inlet pipe are respectively connected to the heat exchange device and the water branch pipe. The water branch pipe is connected with a plurality of water inlet connectors, each of which is connected to the water inlet end of the corresponding battery pack. The water outlet pipeline includes a manifold and a water outlet pipe with a larger diameter than the manifold. The two ends of the water outlet pipe are respectively connected to the heat exchange device and the manifold. The manifold is connected with a plurality of water outlet connectors, each of which is connected to the water outlet end of the corresponding battery pack. Then, after the cooling medium enters the water branch pipe through the water inlet pipe, the flow rate of the cooling medium will be accelerated, and the flow rate of the cooling medium will be reduced after being diverted by multiple water inlet connectors, thereby avoiding the situation where the flow rate of the cooling medium is directly reduced, thereby ensuring the flow rate of the cooling medium entering the battery pack, and then ensuring the cooling or heating efficiency of the battery pack; at the same time, compared with the case where all water inlet pipelines use pipes with larger diameters, the cost of the circulation pipeline is also reduced.

[0034] 2. The water diversion pipe in the present application includes a first water diversion section and a second water diversion section with a smaller diameter than the first water diversion section. The first water diversion section is connected to the water inlet pipe, and the second water diversion section is connected to multiple water inlet connectors, so that after the cooling medium flows through the first water diversion section to the second water diversion section, the flow rate of the cooling medium will increase again, and then the cooling medium will be accelerated twice before entering the battery pack, so as to increase the flow rate of the cooling medium in the battery pack, thereby further increasing the cooling or heating efficiency of the battery pack.

[0035] 3. The multiple battery packs in the present application are arranged in sequence along the vertical direction, and the second water diversion section is extended along the vertical direction, so that the cooling medium can flow into the battery pack under the action of its own gravity, so as to reduce the load of the water pump, thereby reducing the power of the water pump, so as to achieve energy saving effect, thereby reducing the user's use cost, and at the same time, the volume of the water pump can be reduced to achieve the effect of facilitating the arrangement of the circulation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0037] Figure 1This is a schematic diagram of the structure of the circulation pipeline described in one embodiment of the present application;

[0038] Figure 2 This is a schematic structural diagram of the circulation pipeline in another perspective according to one embodiment of the present application;

[0039] Figure 3 This is a structural schematic diagram of the circulation pipeline described in one embodiment of the present application from another perspective.

[0040] Reference numerals:

[0041] 1. Water inlet pipeline; 11. Water inlet pipe; 12. Water distribution pipe; 121. First water distribution section; 122. Second water distribution section; 123. First three-way joint; 2. Water outlet pipeline; 21. Collection pipe; 211. First collection section; 212. Second collection section; 213. Second three-way joint; 22. Water outlet pipe; 3. Battery pack; 31. Water inlet connector; 32. Water outlet connector; 4. First fixing piece; 5. Second fixing piece. DETAILED DESCRIPTION

[0042] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment may be combined with each other without conflict.

[0044] In addition, in the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. are based on the orientations or positional relationships 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.

[0045] 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, an electrical connection, or a communication; 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.

[0046] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0047] Reference Figures 1 to 3 , discloses a circulation pipeline for a thermal management system of an engineering vehicle, including a water inlet pipeline 1 and a water outlet pipeline 2, the water inlet pipeline 1 includes a water inlet pipe 11 and a water branch pipe 12 with a smaller diameter than the water inlet pipe 11, the two ends of the water inlet pipe 11 are respectively connected to a heat exchange device and the water branch pipe 12, the water branch pipe 12 is connected and provided with a plurality of water inlet connectors 31, each of which is connected to a water inlet end of a corresponding battery pack 3, the water outlet pipeline 2 includes a collecting pipe 21 and a water outlet pipe 22 with a larger diameter than the collecting pipe 21, the two ends of the water outlet pipe 22 are respectively connected to the heat exchange device and the collecting pipe 21, the collecting pipe 21 is connected and provided with a plurality of water outlet connectors 32, each of which is connected to a water outlet end of a corresponding battery pack 3.

[0048] It is understandable that multiple battery packs 3 are provided to achieve cooling or heating of the multiple battery packs 3 using a set of circulation pipelines.

[0049] When cooling or heating the battery pack 3, the cooling medium enters the water distribution pipe 12 via the water inlet pipe 11. The cooling medium entering the water distribution pipe 12 enters the interior of the battery pack 3 via the water inlet connector 31, so that the cooling medium flows in the battery pack 3 along the flow channel inside the battery pack 3 to transfer heat with the battery pack 3, thereby cooling or heating the battery pack 3. The cooling medium that transfers heat with the battery pack 3 enters the collecting pipe 21 through the water outlet connector 32 and enters the water outlet pipe 22 via the collecting pipe 21.

[0050] Since the diameter of the water distribution pipe 12 is smaller than the diameter of the water inlet pipe 11, the flow rate of the cooling medium will be accelerated after the cooling medium enters the water distribution pipe 12 through the water inlet pipe 11, and the flow rate of the cooling medium will be reduced after being diverted through multiple water inlet joints, thereby avoiding the direct reduction of the flow rate of the cooling medium, thereby ensuring the flow rate of the cooling medium entering the battery pack 3, and further ensuring the cooling or heating efficiency of the battery pack 3; at the same time, compared with the water inlet pipeline 1 using pipes with larger diameters, the cost of the circulation pipeline is also reduced.

[0051] Since the diameter of the water outlet pipe 22 is larger than the diameter of the collecting pipe 21, the flow rate of the cooling medium can be kept as consistent as possible to avoid the water outlet pipe 2 from being deflated under the action of the water pump, thereby ensuring the normal operation of the circulation pipeline. In addition, compared with using pipes with larger diameters for the water outlet pipe 2, the cost of the circulation pipeline is also reduced.

[0052] In a preferred embodiment, referring to Figure 1 The water diversion pipe 12 includes a first water diversion section 121 and a second water diversion section 122 with a smaller diameter than the first water diversion section 121. The first water diversion section 121 is connected to the water inlet pipe 11, and the second water diversion section 122 is connected to multiple water inlet connectors 31. Then, after the cooling medium flows from the first water diversion section 121 to the second water diversion section 122, the flow rate of the cooling medium will increase again, and then the cooling medium will be accelerated twice before entering the battery pack 3, so as to increase the flow rate of the cooling medium in the battery pack 3, thereby further increasing the cooling or heating efficiency of the battery pack 3.

[0053] Further, see Figure 1 , Figure 2 and Figure 3 , multiple battery packs 3 are arranged in sequence along the vertical direction, and the second water diversion section 122 is extended along the vertical direction, so that the cooling medium can flow into the battery pack 3 under the action of its own gravity, so as to reduce the load of the water pump, thereby reducing the power of the water pump, so as to reduce the energy consumption of the water pump, achieve energy saving effect, reduce the user's use cost, and at the same time can also reduce the volume of the water pump, so as to achieve the effect of facilitating the arrangement of the circulation device.

[0054] It should be noted that the water distribution pipe 12 can also be a structure in which the pipe diameter gradually decreases along the flow direction of the cooling medium, so that when the cooling medium flows in the water distribution pipe 12, the flow velocity of the cooling medium gradually increases, and at the same time, the number of parts required to be assembled when assembling the circulation pipeline is reduced, thereby improving the assembly efficiency of the circulation pipeline.

[0055] In a preferred embodiment, referring to Figure 1 The collecting pipe 21 includes a first collecting section 211 and a second collecting section 212 whose diameter is larger than that of the first collecting section 211. The first collecting section 211 is connected to a plurality of water outlet connectors 32, and the second collecting section 212 is connected to the water outlet pipe 22. Compared with the solution in which the entire collecting pipe 21 has a larger diameter, the cost of the circulation pipeline is further reduced.

[0056] Preferably, the first aggregation section 211 is extended in the vertical direction, and the second aggregation section 212 is connected to the lower section of the first aggregation section 211, so that the cooling medium can flow into the second aggregation section 212 under the action of its own gravity.

[0057] It should be noted that the collecting pipe 21 may also be a structure in which the pipe diameter gradually increases along the flow direction of the cooling medium, so as to reduce the number of components required for assembling the circulation pipeline and improve the assembly efficiency of the circulation pipeline.

[0058] In a preferred embodiment, referring to Figure 1 There are two water distribution pipes 12 and two collecting pipes 21, and each battery pack 3 is provided with a water inlet connector 31 and a water outlet connector 32 at both ends. The two water distribution pipes 12 are respectively connected to the water inlet connectors located at both ends of the battery pack 3, and the two collecting pipes 21 are respectively connected to the water outlet connectors 32 located at both ends of the battery pack 3.

[0059] It is understandable that each battery pack 3 has two cooling channels inside, and the water inlet ends of the two cooling channels are respectively located at the opposite ends of the battery pack 3, and the water outlet ends of the two cooling channels are also respectively located at the opposite ends of the battery pack 3.

[0060] Since there are two water distribution pipes 12 and two collecting pipes 21, and each battery pack 3 is provided with a water inlet connector 31 and a water outlet connector 32 at both ends, the cooling medium enters the interior of the battery pack 3 from both ends of the battery pack 3 through the two water distribution pipes 12, and then flows out from both ends of the battery pack 3 through the water outlet connector 32, so that the temperature at both ends of the battery pack 3 can be kept as consistent as possible, so as to further increase the cooling or heating effect on the battery pack 3.

[0061] In a preferred embodiment, referring to Figure 1 The two water distribution pipes 12 are connected to the water inlet pipe 11 through the first three-way joint 123, and the first three-way joint 123 is fixedly connected to the engineering vehicle, thereby increasing the connection stability between the water distribution pipes 12 and the water inlet pipe 11, avoiding the situation where the connection stability between the water distribution pipes 12 and the water inlet pipe 11 is affected by the poor use conditions of the engineering vehicle, thereby reducing the failure rate of the circulation pipeline.

[0062] It can be understood that the first three-way joint 123 has a water inlet and two water outlets. The water inlet of the first three-way joint 123 is connected to the water inlet pipe 11, and the two water outlets of the first three-way joint 123 are respectively connected to the two water distribution pipes 12.

[0063] Preferably, a mounting plate is provided on the first three-way joint 123, and the mounting plate is fixedly connected to the frame of the engineering vehicle to achieve a fixed connection between the first three-way joint 123 and the engineering vehicle.

[0064] In a preferred embodiment, referring to Figure 1The two collecting pipes 21 are connected to the water outlet pipe 22 through the second three-way joint 213, and the second three-way joint 213 is fixedly connected to the engineering vehicle, thereby increasing the connection stability between the collecting pipe 21 and the water inlet pipe 11, avoiding the situation where the connection stability between the water distribution pipe 12 and the water inlet pipe 11 is affected by the poor use conditions of the engineering vehicle, thereby reducing the failure rate of the circulation pipeline.

[0065] It can be understood that the second three-way joint 213 has a water outlet and two water inlets. The water outlet of the second three-way joint 213 is connected to the water outlet pipe 22, and the two water inlets of the second three-way joint 213 are respectively connected to the two collecting pipes 21.

[0066] Preferably, the second three-way joint 213 is also provided with a mounting plate, and the mounting plate is fixedly connected to the frame of the engineering vehicle to achieve a fixed connection between the second three-way joint 213 and the engineering vehicle.

[0067] In a preferred embodiment, referring to Figure 1 The water pipe 12 includes a first water diversion section 121 extending in a horizontal direction, and the collecting pipe 21 includes a second collecting section 212 extending in a horizontal direction. The first water diversion section 121 is located above the second collecting section 212.

[0068] Since the first water diversion section 121 is located above the second aggregation section 212, the cooling medium can flow into the battery pack 3 under the action of its own gravity, and can flow out of the battery pack 3 and enter the second aggregation section 212 under the action of its own gravity, so as to reduce the load of the water pump, thereby reducing the power of the water pump and reducing the energy consumption of the water pump, so as to achieve the effect of reducing the cost of use.

[0069] In a preferred embodiment, the water inlet pipe 11 has a water inlet port away from the water distribution pipe 12 , and the water inlet port is located above the battery pack 3 .

[0070] Since the water inlet port is located above the battery pack 3, the coolant can enter the battery pack 3 through the water inlet pipe 11 and the water distribution pipe 12 under the action of its own gravity, so as to further reduce the load of the water pump, thereby further reducing the requirement for the water pump power, so that a smaller power water pump can be used to match the circulation pipeline, and at the same time reduce the energy consumption of cooling or heating the battery pack 3, so as to reduce the cost of cooling or heating the battery pack 3.

[0071] In a preferred embodiment, referring to Figure 1The circulation pipeline also includes a first fixing part 4 fixedly connected to the engineering vehicle, and the water inlet pipe 11 is fixedly connected to the first fixing part 4. That is to say, the water inlet pipe 11 is fixedly connected to the engineering vehicle through the first fixing part 4 to increase the stability of the water inlet pipe 11 to avoid the situation where the water inlet pipe 11 is easily damaged due to lack of restraint, thereby reducing the failure rate of the circulation pipeline and increasing the service life of the circulation pipeline.

[0072] Preferably, a plurality of first fixing members 4 are sequentially arranged at intervals along the length direction of the water inlet pipe 11 to increase the fixing points of the water inlet pipe 11 , thereby further increasing the stability of the water inlet pipe 11 .

[0073] The present application does not make any specific limitation on the structure of the first fixing member 4. Preferably, the first fixing member 4 includes a fixing ring sleeved on the outside of the water inlet pipe 11 and an extension piece provided on the fixing ring, and the extension piece is fixedly connected to the frame of the engineering vehicle to facilitate the installation and fixation of the water inlet pipe 11.

[0074] In a preferred embodiment, referring to Figure 1 The circulation pipeline also includes a second fixing member 5 fixedly connected to the engineering vehicle, and the water outlet pipe 22 is fixedly connected to the second fixing member 5. That is to say, the water outlet pipe 22 is fixedly connected to the engineering vehicle through the second fixing member 5 to increase the stability of the water outlet pipe 22 and avoid the water outlet pipe 22 from being easily damaged due to lack of restraint, thereby reducing the failure rate of the circulation pipeline and increasing the service life of the circulation pipeline.

[0075] The present application does not make any specific limitation on the structure of the second fixing member 5. Preferably, the second fixing member 5 includes a fixing plate fixedly connected to the frame of the engineering vehicle and a plurality of fixing plates arranged on the fixing plate. The plurality of fixing plates are all wrapped around the outside of the water outlet pipe 22 to increase the connection points between the water outlet pipe 22 and the engineering vehicle, while achieving the effect of facilitating the installation and fixation of the water outlet pipe 22.

[0076] In a preferred embodiment, the flow areas of the multiple water inlet connectors 31 are gradually increased from top to bottom, so that the amount of cooling medium entering the battery pack 3 through the water distribution pipe 12 is kept as consistent as possible to ensure the uniformity of cooling or heating of the multiple battery packs 3.

[0077] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0078] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0079] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A circulation pipeline for a thermal management system of an engineering vehicle, characterized in that: The invention comprises a water inlet pipeline (1) and a water outlet pipeline (2), wherein the water inlet pipeline (1) comprises a water inlet pipe (11) and a water branch pipe (12) having a smaller diameter than the water inlet pipe (11), wherein the two ends of the water inlet pipe (11) are respectively connected to a heat exchange device and the water branch pipe (12), wherein the water branch pipe (12) is provided with a plurality of water inlet connectors (31), and each of the water inlet connectors (31) is connected to the water inlet end of a corresponding battery pack (3), and the water outlet pipeline (2) comprises a collecting pipe (21) and a water outlet pipe (22) having a larger diameter than the collecting pipe (21), wherein the two ends of the water outlet pipe (22) are respectively connected to the heat exchange device and the collecting pipe (21), wherein the collecting pipe (21) is provided with a plurality of water outlet connectors (32), and each of the water outlet connectors (32) is connected to the water outlet end of a corresponding battery pack (3).

2. The circulation pipeline for a thermal management system of an engineering vehicle according to claim 1, characterized in that: The water diversion pipe (12) comprises a first water diversion section (121) and a second water diversion section (122) having a smaller diameter than the first water diversion section (121); the first water diversion section (121) is connected to the water inlet pipe (11), and the second water diversion section (122) is connected to a plurality of the water inlet connectors (31).

3. The circulation pipeline for a thermal management system of an engineering vehicle according to claim 2, characterized in that: The plurality of battery packs (3) are arranged in sequence along the vertical direction, and the second water-dividing section (122) is extended along the vertical direction.

4. The circulation pipeline for a thermal management system of an engineering vehicle according to claim 1, characterized in that: The collecting pipe (21) comprises a first collecting section (211) and a second collecting section (212) having a larger diameter than the first collecting section (211); the first collecting section (211) is connected to a plurality of the water outlet connectors (32); and the second collecting section (212) is connected to the water outlet pipe (22).

5. The circulation pipeline for a thermal management system of an engineering vehicle according to claim 1, characterized in that: Two of the water distribution pipes (12) and the water collection pipes (21) are provided, and the water inlet connector (31) and the water outlet connector (32) are provided at both ends of each battery pack (3). The two water distribution pipes (12) are respectively connected to the water inlet connectors (31) located at both ends of the battery pack (3), and the two collection pipes (21) are respectively connected to the water outlet connectors (32) located at both ends of the battery pack (3).

6. The circulation pipeline for a thermal management system of an engineering vehicle according to claim 5, characterized in that: The two water distribution pipes (12) are connected to the water inlet pipe (11) via a first three-way joint (123), and the first three-way joint (123) is fixedly connected to the engineering vehicle; And / or, the two collecting pipes (21) are connected to the water outlet pipe (22) via a second three-way joint (213), and the second three-way joint (213) is fixedly connected to the engineering vehicle.

7. The circulation pipeline for a thermal management system of an engineering vehicle according to claim 1, characterized in that: The water distribution pipe (12) comprises a first water distribution section (121) extending in a horizontal direction, and the collecting pipe (21) comprises a second collecting section (212) extending in a horizontal direction, wherein the first water distribution section (121) is located above the second collecting section (212).

8. The circulation pipeline for a thermal management system of an engineering vehicle according to claim 1, characterized in that: The water inlet pipe (11) has a water inlet port which is away from the water distribution pipe (12), and the water inlet port is located above the battery pack (3).

9. The circulation pipeline for a thermal management system of an engineering vehicle according to claim 1, characterized in that: It also includes a first fixing member (4) fixedly connected to the engineering vehicle, and the water inlet pipe (11) is fixedly connected to the first fixing member (4); And / or, it also includes a second fixing member (5) fixedly connected to the engineering vehicle, and the water outlet pipe (22) is fixedly connected to the second fixing member (5).

10. The circulation pipeline for a thermal management system of an engineering vehicle according to claim 1, characterized in that: The flow areas of the plurality of water inlet connectors (31) are arranged to gradually increase from top to bottom.

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