Circulating device for thermal management system of engineering vehicle

Abstract

The utility model relates to the technical field of engineering vehicles, and discloses a circulating device for a thermal management system of an engineering vehicle, the circulating device comprises at least two water pumps and battery modules in one-to-one correspondence with the water pumps, each battery module is communicated with a water inlet pipeline, and each water inlet pipeline is communicated with the corresponding water pump; the circulating device comprises a plurality of water pumps and a plurality of battery modules, the water pumps are communicated with the corresponding water inlet pipelines so that the water pumps can convey cooling media into the corresponding battery modules through the corresponding water inlet pipelines, and each battery module is communicated with a water outlet pipeline so that the cooling media entering the battery modules can flow out through the water outlet pipelines. Therefore, the requirement for the power of each water pump is reduced, the size of the water pump is reduced, the water pumps can be arranged in a small space, the situation that the size of a container is occupied due to the fact that the size of the water pumps is large is avoided, the cargo capacity of the engineering vehicle is guaranteed, and meanwhile the cost of the thermal management system is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of engineering vehicles, and in particular relates to a circulation device 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 then 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 more battery packs, and more battery packs will increase the power of the water pump, which will result in a larger volume of the water pump, resulting in the thermal management system needing to occupy a larger space, thereby encroaching on the cargo space of the engineering vehicle or increasing the difficulty of arranging the thermal management system, while increasing the cost of the thermal management system. Utility Model Content

[0004] The present application provides a circulation device for a thermal management system of an engineering vehicle to ensure the cargo space of the engineering vehicle, reduce the difficulty of arranging the thermal management system, and reduce the cost of the thermal management system.

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

[0006] A circulation device for a thermal management system of an engineering vehicle comprises at least two water pumps and battery modules corresponding to the water pumps one by one, each of the battery modules is connected to a water inlet pipe, each of the water inlet pipes is connected to the corresponding water pump, so that the water pump transports a cooling medium to the corresponding battery module via the corresponding water inlet pipe, each of the battery modules is connected to a water outlet pipe, so that the cooling medium entering the battery module flows out via the water outlet pipe, connecting pipes are provided between the multiple water inlet pipes, so that the multiple water inlet pipes are connected to each other through the connecting pipes, each of the water pumps is provided with an operating status sensor and / or each of the water inlet pipes is provided with at least one flow sensor.

[0007] By adopting the above technical solution, when a thermal management system with a circulation device in the present application is used to cool down a battery module, multiple water pumps are started, and then the water pumps transport the cooled cooling medium to the battery module through the water inlet pipe, so that the cooling medium flows through the battery module and then returns to the water tank through the water outlet pipe. When the cooling medium flows through the battery module, heat is transferred with the battery module to reduce the temperature of the battery module, so as to achieve the effect of cooling the battery module. When a thermal management system with a circulation device in the present application is used to heat a battery module, multiple water pumps are started, and then the water pumps transport the heated cooling medium to the battery module through the water inlet pipe, so that the cooling medium flows through the battery module and then returns to the water tank through the water outlet pipe. When the cooling medium flows through the battery module, heat is transferred with the battery module to increase the temperature of the battery module, so as to achieve the effect of heating the battery module.

[0008] The circulation device in the present application pumps cooling medium to multiple battery modules through multiple water pumps, thereby reducing the power requirement of each water pump to reduce the volume of the water pump, so that the water pump can be arranged in a smaller space to avoid the situation where the volume of the cargo box is occupied due to the large volume of the water pump, thereby ensuring the cargo capacity of the engineering vehicle. At the same time, the difficulty of arranging the water pump is reduced, thereby reducing the difficulty of arranging the thermal management system, and because the power of the water pump is reduced, the cost of the thermal management system is reduced.

[0009] Since connecting pipes are arranged between multiple water inlet pipes, when a single water pump fails, the water pump that can work normally can transport the cooling medium to the water inlet pipe corresponding to the failed water pump, so as to perform thermal management on each battery module and avoid high or low temperature in a single battery module, thereby ensuring the safe operation of the engineering vehicle and increasing the safety of the engineering vehicle.

[0010] Since each water pump is provided with an operating status sensor and / or each water inlet pipe is provided with at least one flow sensor, the driver can clearly understand the working status of each water pump and / or the flow status of the cooling medium in each water inlet pipe, so that the driver can understand the thermal management status of the battery module in real time to ensure the safety of the construction machinery.

[0011] Optionally, the connecting pipe is provided with a control valve to control the connection or disconnection of the plurality of water inlet pipelines.

[0012] By adopting the above technical solution, when a single water pump fails, the control valve is opened to connect multiple water inlet pipes, so that other normally operating water pumps can pump the cooling medium to the battery module corresponding to the failed water pump, so as to perform thermal management on each battery module.

[0013] Optionally, a one-way valve is further provided downstream of the connection between each water inlet pipeline and the connecting pipe, and the one-way valve can control the closing or opening degree of the downstream of the water inlet pipeline.

[0014] By adopting the above technical solution, since the one-way valve is located downstream of the connection between the water inlet pipe and the connecting pipe, and the one-way valve can control the closing or opening of the downstream of the water inlet pipe, when a single water pump fails, the flow of coolant can be distributed to ensure the uniformity of cooling or heating of the battery module, thereby further increasing the safety of construction machinery.

[0015] Optionally, it also includes a return water main pipeline, and the multiple water outlet pipelines are connected to the return water main pipeline, so that the cooling medium in the multiple water outlet pipelines enters the return water main pipeline and is collected.

[0016] By adopting the above technical solution, since multiple water outlet pipes are connected to the return water main pipe, the multiple water outlet pipes are then collected through the return water main pipe and then enter the water tank, so as to reduce the number of connecting ports that need to be set on the water tank, thereby reducing the production cost of the water tank, and further reducing the connection cost between the pipes and the water tank.

[0017] Optionally, the water pump is located above the battery module.

[0018] By adopting the above technical solution, since the water pump is located above the battery module, that is, the water tank is located above the battery module, the cooling medium can flow under the action of its own gravity, so as to further reduce the load of a single water pump, thereby further reducing the power requirement for a single water pump, so as to further reduce the volume of the water pump, and further reduce the cost of the thermal management system.

[0019] Optionally, the water inlet pipeline includes a water inlet pipe and a water distribution pipe located at the bottom of the water inlet pipe, and the water outlet pipeline includes a collecting pipe and a water outlet pipe, and the collecting pipe is located at the bottom of the water distribution pipe.

[0020] By adopting the above technical solution, since the collecting pipe is located at the bottom of the water distribution pipe, the cooling medium flowing out of the battery module is collected at the bottom of the water distribution pipe, so that the cooling medium can flow and collect under the action of its own gravity, so as to further reduce the load of the water pump, thereby further reducing the power required for the water pump, so as to further reduce the volume of the water pump and reduce the cost of the thermal management system.

[0021] Optionally, the plurality of battery modules are respectively located on both sides of the forward direction of the engineering vehicle.

[0022] By adopting the above technical solution, since multiple battery modules are located on both sides of the forward direction of the engineering vehicle, the battery modules can reasonably utilize the space on both sides of the forward direction of the engineering vehicle to avoid the battery modules occupying the cargo box space, thereby ensuring the cargo capacity of the cargo box. At the same time, the outside of the battery pack can be unobstructed to improve the natural cooling effect of the battery.

[0023] Optionally, a plurality of the water pumps are arranged in sequence along the vertical direction.

[0024] By adopting the above technical solution, since multiple water pumps are arranged in sequence along the vertical direction, the vertical space of the engineering vehicle can be reasonably utilized to further avoid the situation where the water pumps occupy the cargo box space, thereby further ensuring the cargo capacity of the cargo box.

[0025] Optionally, a connecting plate is also included, and the plurality of water inlet pipes are all connected to the connecting plate.

[0026] By adopting the above technical solution, since multiple water inlet pipes are connected to the connecting plate, the connecting plate connects the multiple water inlet pipes into one, so as to increase the stability of the multiple water inlet pipes, thereby avoiding the relative movement of the multiple water inlet pipes and affecting the stability of the connection between the connecting pipe and the water inlet pipe, thereby avoiding possible leakage between the water inlet pipe and the connecting pipe.

[0027] Optionally, the battery module includes at least one main battery module, the rated power of the main battery module is greater than that of other battery modules, and the rated power of the water pump corresponding to the main battery module is greater than that of other water pumps;

[0028] And / or, a one-way valve is provided downstream of the connection between the water inlet pipeline corresponding to the main battery module and the connecting pipe, and the one-way valve can control the closing or opening of the downstream of the water inlet pipeline.

[0029] By adopting the above technical solution, since the rated power of the water pump corresponding to the main battery module is greater than the rated power of other water pumps, the cooling or heating efficiency of the main battery module is guaranteed to ensure the normal operation of the engineering machinery and the cruising range of the engineering machinery. Since a one-way valve is provided downstream of the connection between the water inlet pipeline corresponding to the main battery module and the connecting pipe, the flow rate of the cooling medium flowing into the main battery module can be controlled to ensure the cooling and heating efficiency of the main battery module.

[0030] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0031] 1. The circulation device in the present application includes at least two water pumps and battery modules corresponding to the water pumps. Each battery module is connected to a water inlet pipeline, and each water inlet pipeline is connected to the corresponding water pump, so that the water pump can transport the cooling medium to the corresponding battery module through the corresponding water inlet pipeline. Each battery module is connected to a water outlet pipeline, so that the cooling medium entering the battery module can flow out through the water outlet pipeline. That is to say, the circulation device in the present application pumps cooling medium to multiple battery modules through multiple water pumps, thereby reducing the power requirements of each water pump to reduce the volume of the water pump, so that the water pump can be arranged in a smaller space to avoid the situation where the volume of the cargo box is occupied due to the large volume of the water pump, thereby ensuring the cargo capacity of the engineering vehicle. At the same time, the difficulty of arranging the water pump is reduced, so as to reduce the difficulty of arranging the thermal management system, and because the power of the water pump is reduced, the cost of the thermal management system is reduced.

[0032] 2. A connecting pipe is provided between the multiple water inlet pipes in the present application so that the multiple water inlet pipes are interconnected through the connecting pipe. Then, when a single water pump fails, the water pump that can work normally can transport the cooling medium to the water inlet pipe corresponding to the failed water pump, so as to perform thermal management on each battery module to avoid high or low temperature in a single battery module, thereby ensuring the safe operation of the engineering vehicle and increasing the safety of the engineering vehicle.

[0033] 3. The connecting pipe in the present application is provided with a control valve to control the connection or interruption of multiple water inlet pipes, so that when a single water pump fails, the control valve is opened to connect multiple water inlet pipes, so that other normally working water pumps can pump the cooling medium to the battery module corresponding to the failed water pump, so as to perform thermal management on each battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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:

[0035] Figure 1 This is a schematic diagram of the structure of the circulation device in one embodiment of the present application;

[0036] Figure 2 This is a schematic structural diagram of the circulation device in another embodiment of the present application;

[0037] Figure 3 for Figure 2 Magnified view of area A.

[0038] Reference numerals:

[0039] 1. Water pump; 2. Battery module; 21. Battery pack; 3. Water inlet pipeline; 31. Water inlet pipe; 32. Water distribution pipe; 33. Connecting pipe; 331. Control valve; 332. Check valve; 4. Water outlet pipeline; 41. Collecting pipe; 42. Water outlet pipe; 5. Return water main pipeline; 6. Connecting piece. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] Reference Figures 1 to 3 , discloses a circulation device for a thermal management system of an engineering vehicle, comprising at least two water pumps 1 and battery modules 2 corresponding to the water pumps 1 one by one, each battery module 2 is connected to a water inlet pipe 3, each water inlet pipe 3 is connected to the corresponding water pump 1, so that the water pump 1 transports the cooling medium to the corresponding battery module 2 via the corresponding water inlet pipe 3, each battery module 2 is connected to a water outlet pipe 4, so that the cooling medium entering the battery module 2 flows out via the water outlet pipe 4, a connecting pipe 33 is provided between the multiple water inlet pipes 3, and the connecting pipe 33 is connected to the water inlet pipe 3, that is, the multiple water inlet pipes 3 are interconnected through the connecting pipe 33, each water pump 1 is provided with an operating status sensor and / or each water inlet pipe 3 is provided with at least one flow sensor.

[0046] When the battery module 2 is cooled using a thermal management system having a circulation device in the present application, multiple water pumps 1 are started, and then the water pumps 1 transport the cooled cooling medium to the battery module 2 via the water inlet pipe 3, so that the cooling medium flows through the battery module 2 and then returns to the water tank via the water outlet pipe 4. When the cooling medium flows through the battery module 2, heat is transferred with the battery module 2 to reduce the temperature of the battery module 2, thereby achieving the effect of cooling the battery module 2.

[0047] When the battery module 2 is heated using a thermal management system having a circulation device in the present application, multiple water pumps 1 are started, and then the water pumps 1 transport the heated cooling medium to the battery module 2 via the water inlet pipe 3, so that the cooling medium flows through the battery module 2 and then returns to the water tank via the water outlet pipe 4. When the cooling medium flows through the battery module 2, heat is transferred with the battery module 2 to increase the temperature of the battery module 2, thereby achieving the effect of heating the battery module 2.

[0048] The circulation device in the present application pumps cooling medium to multiple battery modules 2 through multiple water pumps 1, thereby reducing the power requirement of each water pump 1, thereby reducing the volume of the water pump 1, so that the water pump 1 can be arranged in a smaller space to avoid the situation where the volume of the cargo box is occupied due to the large volume of the water pump 1, thereby ensuring the cargo capacity of the engineering vehicle. At the same time, the difficulty of arranging the water pump 1 is reduced, thereby reducing the difficulty of arranging the thermal management system, and because the power of the water pump 1 is reduced, the cost of the thermal management system is reduced.

[0049] Since a connecting pipe 33 is provided between the multiple water inlet pipes 3, when a single water pump 1 fails, the water pump 1 that can work normally can transport the cooling medium to the water inlet pipe 3 corresponding to the failed water pump 1, so as to perform thermal management on each battery module 2 and avoid high or low temperature in a single battery module 2, thereby ensuring the safe operation of the engineering vehicle and increasing the safety of the engineering vehicle.

[0050] Since each water pump 1 is provided with an operating status sensor and / or each water inlet pipe 3 is provided with at least one flow sensor, the driver can clearly understand the working status of each water pump 1 and / or the flow status of the cooling medium in each water inlet pipe 3, so that the driver can understand the thermal management status of the battery module in real time to ensure the safety of the construction machinery.

[0051] Preferably, each water pump 1 is provided with an operation status sensor and each water inlet pipe 3 is provided with a flow sensor to avoid a situation where a malfunction of one of the operation status sensor and the flow sensor causes a false alarm of the system.

[0052] The present application does not make any specific limitation on the structure of the operating status sensor, which may be a speed sensor capable of detecting the speed of the rotating shaft of the water pump 1 , or may be other structures as long as it can detect whether the water pump 1 is running.

[0053] In a preferred embodiment, referring to Figure 2 and Figure 3 The connecting pipe 33 is provided with a control valve 331 to control the connection or disconnection of the multiple water inlet pipes 3. It can be understood that when the multiple water pumps 1 are working normally, the control valve 331 is in a closed state to interrupt the connection of the multiple water inlet pipes 31, and when a single water pump 1 fails, the control valve 331 is opened to connect the multiple water inlet pipes 3, so that other normally working water pumps 1 can pump the cooling medium to the battery module 2 corresponding to the failed water pump 1, so as to perform thermal management on each battery module 2.

[0054] The present application does not specifically limit the structure of the control valve 331. Preferably, the control valve 331 is a solenoid valve, so that the solenoid valve can automatically control the connection or interruption of multiple water inlet pipes 3, so as to avoid the need for manual operation of the control valve 331, thereby improving the automation of the engineering vehicle. In other implementation examples, the control valve 331 can also be a manual valve to reduce the cost of the thermal management system.

[0055] In a preferred embodiment, referring to Figure 2A one-way valve 332 is also provided downstream of the connection between each water inlet pipeline 3 and the connecting pipe 33. The one-way valve 332 can control the closing or opening of the downstream of the water inlet pipeline 3. Then, when a single water pump 1 fails, the flow of the coolant can be distributed under the action of the one-way valve 332 to ensure the uniformity of cooling or heating of the battery module 2, so as to further increase the safety of the construction machinery.

[0056] In a preferred embodiment, referring to Figure 2 The circulation device also includes a return water main pipeline 5, and multiple water outlet pipelines 4 are all connected to the return water main pipeline 5, so that the cooling medium in the multiple water outlet pipelines 4 enters the return water main pipeline 5 and is collected. That is to say, after the cooling medium flows out of the battery module 2 through the water outlet pipeline 4, it is collected in the return water main pipeline 5 and enters the water tank through the return water main pipeline 5, so as to reduce the number of connecting ports that need to be set on the water tank, thereby reducing the production cost of the water tank, and then reducing the connection cost between the pipeline and the water tank.

[0057] In other embodiments, the main water return pipeline 5 may be omitted, that is, the cooling medium flowing out of the battery module 2 enters the water tank via the corresponding water outlet pipeline 4 .

[0058] In a preferred embodiment, referring to Figure 1 and Figure 2 The water pump 1 is located above the battery module 2, that is, the water tank is located above the battery module 2, so that the cooling medium can flow under the action of its own gravity, so as to further reduce the load of the single water pump 1, thereby further reducing the power requirement for the single water pump 1, so as to further reduce the volume of the water pump 1, and further reduce the cost of the thermal management system.

[0059] In a preferred embodiment, referring to Figure 1 and Figure 2 The water inlet pipeline 3 includes a water inlet pipe 31 and a water distribution pipe 32 located at the bottom of the water inlet pipe 31 , and the water outlet pipeline 4 includes a collecting pipe 41 and a water outlet pipe 42 , and the collecting pipe 41 is located at the bottom of the water distribution pipe 32 .

[0060] Since the collecting pipe 41 is located at the bottom of the water distribution pipe 32, the cooling medium flowing out of the battery module 2 is collected at the bottom of the water distribution pipe 32, so that the cooling medium can flow and collect under the action of its own gravity, so as to further reduce the load of the water pump 1, thereby further reducing the required power of the water pump 1, so as to further reduce the volume of the water pump 1 and reduce the cost of the thermal management system.

[0061] In a preferred embodiment, referring to Figure 1 and Figure 2, multiple battery modules 2 are respectively located on both sides of the engineering vehicle in the forward direction, so that the battery modules 2 can reasonably use the space on both sides of the engineering vehicle in the forward direction to avoid the battery modules 2 occupying the cargo box space, so as to ensure the cargo capacity of the cargo box, and at the same time, the outside of the battery pack 21 can be unobstructed to improve the natural cooling effect of the battery. At the same time, if the battery pack 21 located on one side of the engineering vehicle has a high temperature due to the influence of light, the flow rate of the corresponding water pump 1 can be adjusted at this time to speed up the cooling efficiency of the battery module 2, thereby ensuring the normal operation of the engineering vehicle and increasing the safety of the engineering vehicle.

[0062] In a preferred embodiment, referring to Figure 1 and Figure 2 , multiple water pumps 1 are arranged in sequence along the vertical direction, so that the vertical space of the engineering vehicle can be reasonably utilized to further avoid the situation where the water pumps 1 occupy the cargo box space, thereby further ensuring the cargo capacity of the cargo box.

[0063] In a preferred embodiment, referring to Figure 1 , Figure 2 and Figure 3 The circulation device also includes a connecting piece 6, and multiple water inlet pipes 3 are all connected to the connecting piece 6, so that the connecting piece 6 connects the multiple water inlet pipes 3 into one, so as to increase the stability of the multiple water inlet pipes 3, so as to avoid the relative movement of the multiple water inlet pipes 3 and affect the connection stability between the connecting pipe 33 and the water inlet pipe 3, thereby avoiding the possible leakage between the water inlet pipe 3 and the connecting pipe 33.

[0064] Preferably, the connecting piece 6 is fixedly connected to the body of the engineering vehicle to further increase the stability of the water inlet pipeline 3 .

[0065] In a preferred embodiment, the battery module 2 includes at least one main battery module, the rated power of the main battery module is greater than that of other battery modules 2, and the rated power of the water pump 1 corresponding to the main battery module is greater than the rated power of other water pumps 1; and / or, a one-way valve 332 is provided downstream of the connection between the water inlet pipeline 3 corresponding to the main battery module and the connecting pipe 33, and the one-way valve 332 can control the closing or opening of the water inlet pipeline 3 downstream.

[0066] Since the rated power of the water pump 1 corresponding to the main battery module is greater than the rated power of other water pumps, the cooling or heating efficiency of the main battery module is guaranteed to ensure the normal operation of the engineering machinery and the cruising range of the engineering machinery. Since a one-way valve 332 is provided downstream of the connection between the water inlet pipeline 3 corresponding to the main battery module and the connecting pipe 33, the flow rate of the cooling medium flowing into the main battery module can be controlled to ensure the cooling and heating efficiency of the main battery module.

[0067] Preferably, the rated power of the water pump 1 corresponding to the main battery module is greater than the rated power of other water pumps 1, and a one-way valve 332 is provided downstream of the connection between the water inlet pipe 3 corresponding to the main battery module and the connecting pipe 33 to further ensure that more cooling medium can flow to the main battery module.

[0068] The present application does not specifically limit the structure of the battery module 2. Preferably, refer to Figure 1 and Figure 2 Each battery module 2 includes a plurality of battery packs 21 arranged in sequence along the vertical direction, so that the plurality of battery packs 21 are arranged in sequence in the height direction of the engineering vehicle, so as to reasonably utilize the vertical space of the engineering vehicle, thereby making the structure of the engineering vehicle more compact, and at the same time reducing the number of required water pumps 1, so as to reduce the cost of the thermal management system. In other embodiments, each battery module 2 may also include only one battery pack 21.

[0069] The present application does not specifically limit the number of battery modules 2. Preferably, two battery modules 2 are provided to make multiple battery packs 21 highly integrated, so as to facilitate the installation and protection of the battery packs 21. In other embodiments, the battery modules 2 may also be provided in other numbers such as three or four.

[0070] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0071] 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.

[0072] 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 device for a thermal management system of an engineering vehicle, characterized in that: The invention comprises at least two water pumps (1) and battery modules (2) corresponding to the water pumps (1) one by one. Each of the battery modules (2) is connected to a water inlet pipeline (3). Each of the water inlet pipelines (3) is connected to the corresponding water pump (1) so that the water pump (1) delivers a cooling medium to the corresponding battery module (2) via the corresponding water inlet pipeline (3). Each of the battery modules (2) is connected to a water outlet pipeline (4) so ​​that the cooling medium entering the battery module (2) flows out via the water outlet pipeline (4). A connecting pipe is provided between the plurality of water inlet pipelines (3) so that the plurality of water inlet pipelines (3) are connected to each other via the connecting pipe (33). Each of the water pumps (1) is provided with an operating status sensor and / or each of the water inlet pipelines (3) is provided with at least one flow sensor.

2. A circulation device for a thermal management system of an engineering vehicle according to claim 1, characterized in that: The connecting pipe (33) is provided with a control valve (331) to control the connection or disconnection of the plurality of water inlet pipelines (3).

3. A circulation device for a thermal management system of an engineering vehicle according to claim 2, characterized in that: A one-way valve (332) is also provided downstream of the connection between each water inlet pipeline (3) and the connecting pipe (33), and the one-way valve (332) can control the closing or opening degree of the downstream of the water inlet pipeline (3).

4. The circulation device for a thermal management system of an engineering vehicle according to claim 1, characterized in that: It also comprises a water return main pipeline (5), and the plurality of water outlet pipelines (4) are all connected to the water return main pipeline (5), so that the cooling medium in the plurality of water outlet pipelines (4) enters the water return main pipeline (5) and is collected.

5. The circulation device for a thermal management system of an engineering vehicle according to claim 1, characterized in that: The water pump (1) is located above the battery module (2).

6. A circulation device for a thermal management system of an engineering vehicle according to claim 5, characterized in that: The water inlet pipeline (3) comprises a water inlet pipe (31) and a water distribution pipe (32) located at the bottom of the water inlet pipe (31); the water outlet pipeline (4) comprises a collecting pipe (41) and a water outlet pipe (42); the collecting pipe (41) is located at the bottom of the water distribution pipe (32).

7. The circulation device for a thermal management system of an engineering vehicle according to claim 1, characterized in that: The plurality of battery modules (2) are respectively located on both sides of the engineering vehicle in the forward direction.

8. The circulation device for a thermal management system of an engineering vehicle according to claim 1, characterized in that: The plurality of water pumps (1) are arranged in sequence along the vertical direction.

9. The circulation device for a thermal management system of an engineering vehicle according to claim 1, characterized in that: It also comprises a connecting piece (6), and the plurality of water inlet pipes (3) are all connected to the connecting piece (6).

10. The circulation device for a thermal management system of an engineering vehicle according to claim 2, characterized in that: The battery module (2) comprises at least one main battery module, the rated power of the main battery module is greater than that of the other battery modules (2), and the rated power of the water pump (1) corresponding to the main battery module is greater than the rated power of the other water pumps (1); And / or, a one-way valve (332) is provided downstream of the connection between the water inlet pipeline (3) corresponding to the main battery module and the connecting pipe (33), and the one-way valve (332) can control the closing or opening of the downstream of the water inlet pipeline (3).

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