Electric tractor heat management integrated device and electric tractor

Abstract

The utility model provides an electric tractor heat management integrated device and an electric tractor. An electric tractor heat management integrated device comprises a frame, an optimized battery pack, an electric drive system, a heat dissipation water tank used for the electric drive system, a cooling unit used for battery cooling and a cooling box, and the optimized battery pack and the electric drive system are both installed on the frame. The heat dissipation water tank and the cooling unit are integrated in the cooling box, the cooling box is connected with the optimized battery pack and the electric drive system through pipelines, and the cooling box is installed on one side of the frame.

Description

Technical Field

[0001] The utility model relates to the technical field of tractor thermal management, in particular to an electric tractor thermal management integrated device and an electric tractor. Background Art

[0002] Electric tractors are becoming increasingly popular in the agricultural sector due to their low carbon emissions, low noise, and fuel efficiency. Like electric vehicles, battery life and lifespan are also key concerns. Currently, most electric tractor batteries are placed under the hood, with the battery cooling unit fixed to the side of the frame and the radiator tank for cooling the motor fixed to the front of the frame. Figure 6 This is the layout of most current vehicle models. The cooling unit 3 is on one side of the frame and cools the battery pack 1 separately by compressing the refrigerant with a compressor. The radiator is fixed in front of the vehicle body (the front is defined as the direction of vehicle travel) and is used to cool the electric drive system.

[0003] This arrangement compresses the battery space, reducing the battery charge. Meanwhile, the hot air exhausted by the cooling fan hinders heat dissipation from the battery pack. Furthermore, this arrangement makes the cooling line from the cooling water tank to the motor very long, making it difficult to route. Therefore, designing a highly integrated cooling device is crucial. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an electric tractor thermal management integrated device and an electric tractor in view of the deficiencies in the prior art.

[0005] The utility model provides a technical solution to the above-mentioned technical problem as follows: an electric tractor thermal management integrated device, comprising: a vehicle frame, an optimized battery pack, an electric drive system, a heat dissipation water tank for the electric drive system, a cooling unit for battery cooling, and a cooling box. The optimized battery pack and the electric drive system are both mounted on the vehicle frame, the heat dissipation water tank and the cooling unit are integrated in the cooling box, and the cooling box is connected to the optimized battery pack and the electric drive system respectively through pipelines. The cooling box is mounted on one side of the vehicle frame.

[0006] The beneficial effects of adopting the technical solution of this utility model are as follows: the electric drive system's radiator and cooling unit are integrated into a single cooling box, fixed to one side of the vehicle frame. This integration allows for more usable space for the optimized battery pack. The radiator tank is relocated away from the optimized battery pack. This separation also improves the heat dissipation of the battery. Furthermore, most electric drive systems are located under the cockpit, and the cooling lines from the radiator to the electric drive system are relatively long, making installation difficult. After integration, the cooling line layout is relatively simple.

[0007] Further, the cooling box comprises a compressor, a heat exchanger, a three-way valve, an expansion valve, a battery water pump, a PTC heater, a four-way valve, a radiator, a condenser and a cooling fan, the heat exchanger, the three-way valve and the expansion valve are installed on the left side plate of the cooling box, the compressor, the battery water pump and the radiator are installed on the bottom plate of the cooling box, the condenser and the cooling fan are respectively installed on the front and rear sides of the radiator, and the PTC heater and the four-way valve are installed on the right side plate of the cooling box.

[0008] The beneficial effect of the above further technical solution is that the radiator is fixed with a cooling fan behind the radiator for cooling the radiator.

[0009] Further, the compressor is connected with the condenser through a pipeline, the condenser is connected with the expansion valve and the heat exchanger through a pipeline respectively, the expansion valve is connected with an evaporator through a pipeline, the evaporator and the heat exchanger are connected with the compressor through a pipeline respectively, the cooling liquid passage of the heat exchanger is connected with the three-way valve and the battery water pump through a pipeline respectively, the battery water pump is connected with the four-way valve through a pipeline, the four-way valve is connected with the PTC heater, the electric drive system and the three-way valve through a pipeline respectively, the PTC heater is connected with the optimized battery pack through a pipeline, and the optimized battery pack is connected with the radiator and the three-way valve through a pipeline respectively.

[0010] The beneficial effect of the above further technical solution is that the outlet of the compressor is connected with the inlet of the condenser, the refrigerant from the compressor can be cooled by the condenser, and then can enter the evaporator through the expansion valve according to actual needs, to perform cabin refrigeration, and can enter the heat exchanger to exchange heat with the cooling liquid from the optimized battery pack to cool the optimized battery pack, and the refrigerant from the evaporator and the heat exchanger returns to the compressor.

[0011] Further, the heat exchanger is integrated with the expansion valve, the radiator comprises a motor radiator and a battery radiator, the optimized battery pack is connected with the battery radiator through a pipeline, and the electric drive system is connected with the motor radiator through a pipeline.

[0012] The beneficial effect of the above further technical solution is that the radiator is divided into two chambers of motor heat dissipation and battery heat dissipation. The motor radiator and the battery radiator are integrated into an integrated radiator, so as to reduce the space of the radiator and make the structure compact.

[0013] Further, the A port of the three-way valve is connected with the battery radiator through a pipeline, the B port of the three-way valve is connected with the heat exchanger through a pipeline, and the C port of the three-way valve is respectively connected with the optimized battery pack and the battery radiator through a pipeline.

[0014] The beneficial effect of the above further technical solution is that the connection relationship between each port of the three-way valve and the components facilitates the installation and maintenance of the three-way valve.

[0015] Further, the 1 port of the four-way valve is connected with the battery water pump through a pipeline, the 2 port of the four-way valve is connected with the PTC heater through a pipeline, and the 3 port and the 4 port of the four-way valve are both connected with the electric drive system through a pipeline.

[0016] The beneficial effect of the above further technical solution is that the connection relationship between each port of the four-way valve and the components facilitates the installation and maintenance of the four-way valve.

[0017] Further, the cooling box is connected with a first electric drive system cooling liquid outlet, a battery pack cooling liquid inlet, a first electric drive system cooling liquid inlet, a second electric drive system cooling liquid inlet, a second electric drive system cooling liquid outlet, and a battery pack cooling liquid outlet, the optimized battery pack is respectively connected with the radiator and the three-way valve through the battery pack cooling liquid outlet, and the PTC heater is connected with the battery pack cooling liquid inlet of the optimized battery pack through a pipeline; the electric drive system is respectively connected with the first electric drive system cooling liquid outlet, the first electric drive system cooling liquid inlet, the second electric drive system cooling liquid inlet, and the second electric drive system cooling liquid outlet through a pipeline.

[0018] The beneficial effect of the further technical scheme is that: the cooling liquid from the optimized battery pack is divided into two paths through the battery pack cooling liquid outlet: one path goes to the battery radiator, and the air convection of the cooling fan is used to cool the optimized battery pack; the other path is connected to the three-way valve C, and the cooling liquid is heat exchanged with the refrigerant in the heat exchanger, and then sequentially passes through the battery water pump-four-way valve 1, 2 channel-PTC heater-battery pack cooling liquid inlet on the cooling box, and then enters the optimized battery pack for cooling. Different modes can be selected according to the actual temperature requirement of the battery. The cooling liquid from the electric drive system can also be divided into two paths: one path is connected to the first electric drive system cooling liquid outlet 14 on the cooling box, and then passes through the four-way valve 2, 3 channel-PTC heater-optimized battery pack-three-way valve B, C-heat exchanger-battery water pump-four-way valve 1, 4-first electric drive system cooling liquid inlet connector on the cooling box, and then enters the electric drive system. This mode is mainly to use the waste heat of the electric drive system to heat the optimized battery pack; the other path is connected to the second electric drive system cooling liquid outlet on the cooling box, and then enters the motor radiator, and then passes through the second electric drive system cooling liquid inlet on the cooling box and returns to the electric drive system. This mode is for the heat dissipation of the electric drive system.

[0019] Further, the optimized battery pack is located on the front side of the vehicle frame, the electric drive system is located behind the optimized battery pack, the cooling box is located between the electric drive system and the optimized battery pack, and the cooling box is located on the left side or the right side of the vehicle frame.

[0020] The beneficial effect of the further technical scheme is that: the integrated cooling box is fixed on one side of the vehicle frame, which reduces the use space of the parts in the vehicle on the one hand, and on the other hand, since the cooling water tank is close to the electric drive system, the layout of the cooling liquid pipeline is simplified.

[0021] Further, the cooling box is connected with an evaporator inlet, the evaporator inlet is connected with an evaporator, and a fan is installed adjacent to the evaporator.

[0022] The beneficial effect of the further technical scheme is that: the cooling box is connected with the evaporator.

[0023] In addition, the utility model provides a kind of electric tractor, including the electric tractor heat management integrated device of any one described above.

[0024] The beneficial effect of the technical scheme of the utility model is that the heat dissipation water tank and the cooling unit of the electric drive system are integrated into a cooling box and fixed on one side of the vehicle frame. After integration, the optimized battery pack has more space for use. The heat dissipation water tank is repositioned to be far away from the optimized battery pack. The heat dissipation water tank being far away from the optimized battery pack improves the heat dissipation of the battery. In addition, most of the electric drive system is arranged below the driver's cabin, and the cooling pipeline from the heat dissipation water tank to the electric drive system is relatively long, and the cooling pipeline is difficult to install. After integration, the cooling pipeline is relatively simple to arrange.

[0025] The advantages of the additional aspects of the utility model will be partially given in the following description, some will become apparent from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The structure schematic view of the electric tractor thermal management integrated device provided by the utility model embodiment.

[0027] Figure 2 The structure schematic view of the cooling box provided by the utility model embodiment.

[0028] Figure 3 The structure schematic view of the cooling box provided by the utility model embodiment.

[0029] Figure 4 The structure schematic view of the cooling box provided by the utility model embodiment.

[0030] Figure 5 The connection relationship schematic view of the cooling box provided by the utility model embodiment.

[0031] Figure 6 The structure schematic view of the cooling device in the prior art.

[0032] BRIEF DESCRIPTION OF DRAWINGS: 1, battery pack; 2, heat dissipation water tank; 3, cooling unit; 4, optimized battery pack; 5, cooling box; 6, electric drive system; 7, compressor; 8, heat exchanger; 9, three-way valve; 10, expansion valve; 11, battery water pump; 12, PTC heater; 13, four-way valve; 14, first electric drive system cooling liquid outlet; 15, battery pack cooling liquid inlet; 16, first electric drive system cooling liquid inlet; 17, second electric drive system cooling liquid inlet; 18, second electric drive system cooling liquid outlet; 19, battery pack cooling liquid outlet; 20, radiator; 21, condenser; 22, cooling fan; 23, evaporator inlet. DETAILED DESCRIPTION

[0033] The principles and characteristics of the utility model are described below in combination with the drawings, and the examples are only used to explain the utility model and not to limit the scope of the utility model.

[0034] As Figures 1 to 5 The utility model discloses an electric tractor heat management integrated device, including: frame, optimized battery pack 4, electric drive system 6, the heat dissipation water tank for electric drive system 6, the cooling unit for battery cooling, cooling box 5, the optimized battery pack 4 and electric drive system 6 all install on the frame, the heat dissipation water tank and cooling unit are integrated in cooling box 5, cooling box 5 is connected with optimized battery pack 4 and electric drive system 6 respectively through pipeline, and cooling box 5 is installed on one side of the frame.

[0035] The beneficial effects of the utility model technical scheme are: the heat dissipation water tank and cooling unit of electric drive system are integrated into a cooling box and fixed on one side of the frame.After integration, the optimized battery pack can have more use space.The heat dissipation water tank is rearranged to be far away from the optimized battery pack.The heat dissipation water tank far away from the optimized battery pack improves the heat dissipation of the battery.In addition, most of the electric drive system is arranged below the cockpit, and the cooling pipeline from the heat dissipation water tank to the electric drive system is relatively long, and the cooling pipeline is troublesome to install.After integration, the cooling pipeline arrangement is relatively simple.

[0036] In order to make the battery pack have more use space to increase the battery capacity, and make the battery pack easy to dissipate heat.In addition, in order to further simplify the cooling pipeline arrangement of the electric drive system, the utility model embodiment integrates the heat dissipation water tank and the cooling unit into a cooling water tank (cooling box 5), and fixes the water tank (cooling box 5) to one side of the vehicle body (frame), which greatly reduces the use space of the components.

[0037] Figure 1 It is the arrangement mode of improved vehicle model, and the heat dissipation water tank and cooling unit of electric drive system 6 are integrated into a cooling box body (cooling box 5) and fixed on one side of the frame.After integration, the battery pack (optimized battery pack 4) can have more use space, and the heat dissipation water tank is far away from the battery pack (optimized battery pack 4), so that the heat dissipation of the battery is improved.In addition, most of the motor system (electric drive system) is arranged below the cockpit, and the cooling pipeline from the heat dissipation water tank to the motor (electric drive system 6) is relatively long, and the cooling pipeline is troublesome to install.After integration, the cooling pipeline arrangement is relatively simple.

[0038] As Figures 1 to 5As shown, further, the cooling box 5 comprises: a compressor 7, a heat exchanger 8, a three-way valve 9, an expansion valve 10, a battery water pump 11, a PTC heater 12, a four-way valve 13, a radiator 20, a condenser 21, and a cooling fan 22, wherein the heat exchanger 8, the three-way valve 9, and the expansion valve 10 are all installed on the left side plate of the cooling box 5, the compressor 7, the battery water pump 11, and the radiator 20 are all installed on the bottom plate of the cooling box 5, the condenser 21 and the cooling fan 22 are respectively installed on the front and rear sides of the radiator 20, and the PTC heater 12 and the four-way valve 13 are installed on the right side plate of the cooling box 5.

[0039] The beneficial effect of the above further technical solution is that the radiator is fixed with a cooling fan behind the radiator for cooling the radiator. The installation positions of the various components in the cooling box are designed to make the structure compact, simplify the structure, and improve the integration.

[0040] As shown in the figure, Figures 1 to 5 Further, the compressor 7 is connected with the condenser 21 through a pipeline, the condenser 21 is connected with the expansion valve 10 and the heat exchanger 8 through a pipeline respectively, the expansion valve 10 is connected with an evaporator through a pipeline, the evaporator and the heat exchanger 8 are connected with the compressor 7 through a pipeline, the cooling liquid passage of the heat exchanger 8 is connected with the three-way valve 9 and the battery water pump 11 through a pipeline respectively, the battery water pump 11 is connected with the four-way valve 13 through a pipeline, the four-way valve 13 is connected with the PTC heater 12, the electric drive system 6, and the three-way valve 9 through a pipeline respectively, the PTC heater 12 is connected with the optimized battery pack 4 through a pipeline, and the optimized battery pack 4 is connected with the radiator 20 and the three-way valve 9 through a pipeline respectively.

[0041] The beneficial effect of the above further technical solution is that the outlet of the compressor is connected with the inlet of the condenser, the refrigerant from the compressor can pass through the expansion valve to enter the evaporator after heat dissipation of the condenser according to actual needs, to perform cabin refrigeration, and one way enters the heat exchanger to exchange heat with the cooling liquid from the optimized battery pack to cool the optimized battery pack, and the refrigerant from the evaporator and the heat exchanger returns to the compressor.

[0042] As shown in the figure, Figures 1 to 5 Further, the heat exchanger 8 is integrated with an expansion valve, the radiator 20 comprises a motor radiator and a battery radiator, the optimized battery pack 4 is connected with the battery radiator through a pipeline, and the electric drive system 6 is connected with the motor radiator through a pipeline.

[0043] The beneficial effect of the further technical scheme is that the heat sink is divided into two chambers for motor heat dissipation and battery heat dissipation. The motor heat sink and the battery heat sink are integrated into an integrated heat sink, reducing the space of the heat sink and making the structure compact.

[0044] As shown in Figures 1 to 5 Further, the A port of the three-way valve 9 is connected with the battery heat sink through a pipeline, the B port of the three-way valve 9 is connected with the heat exchanger 8 through a pipeline, and the C port of the three-way valve 9 is connected with the optimized battery pack 4 and the battery heat sink through a pipeline respectively.

[0045] The beneficial effect of the further technical scheme is that the connection relationship between each port of the three-way valve and the components is designed to facilitate the installation and maintenance of the three-way valve.

[0046] As shown in Figures 1 to 5 Further, the 1 port of the four-way valve 13 is connected with the battery water pump 11 through a pipeline, the 2 port of the four-way valve 13 is connected with the PTC heater 12 through a pipeline, and the 3 port and the 4 port of the four-way valve 13 are both connected with the electric drive system 6 through a pipeline.

[0047] The beneficial effect of the further technical scheme is that the connection relationship between each port of the four-way valve and the components is designed to facilitate the installation and maintenance of the four-way valve.

[0048] As shown in Figures 1 to 5 Further, the cooling box 5 is connected with a first electric drive system cooling liquid outlet 14, a battery pack cooling liquid inlet 15, a first electric drive system cooling liquid inlet 16, a second electric drive system cooling liquid inlet 17, a second electric drive system cooling liquid outlet 18, and a battery pack cooling liquid outlet 19. The optimized battery pack 4 is connected with the heat sink 20 and the three-way valve 9 through the battery pack cooling liquid outlet 19, and the PTC heater 12 is connected with the battery pack cooling liquid inlet 15 of the optimized battery pack 4 through a pipeline. The electric drive system 6 is connected with the first electric drive system cooling liquid outlet 14, the first electric drive system cooling liquid inlet 16, the second electric drive system cooling liquid inlet 17, and the second electric drive system cooling liquid outlet 18 through a pipeline respectively.

[0049] The beneficial effect of adopting this further technical solution is that the coolant from the optimized battery pack is divided into two paths through the battery pack coolant outlet: one path goes to the battery radiator, where it uses air convection from the cooling fan to cool the optimized battery pack; the other path is connected to port C of the three-way valve. The coolant exchanges heat with the refrigerant in the heat exchanger, then passes through the battery water pump, channels 1 and 2 of the four-way valve, the PTC heater, and the battery pack coolant inlet on the cooling box before entering the optimized battery pack for cooling. Different modes can be selected based on the actual battery temperature requirements. The coolant coming out of the electric drive system can also be divided into two routes: one route is connected to the first electric drive system coolant outlet 14 on the cooling box, and then passes through channels 2 and 3 of the four-way valve-PTC heater-optimized battery pack-three-way valves B and C-heat exchanger-battery water pump-four-way valves 1 and 4-the first electric drive system coolant inlet connector on the cooling box and then enters the electric drive system. This mode is mainly to use the waste heat of the electric drive system to heat the optimized battery pack; the other route is connected to the second electric drive system coolant outlet on the cooling box, and then enters the motor radiator, and then passes through the second electric drive system coolant inlet on the cooling box and returns to the electric drive system. This mode is for heat dissipation of the electric drive system.

[0050] like Figures 1 to 5 As shown, further, the optimized battery pack 4 is located on the front side of the frame, the electric drive system 6 is located behind the optimized battery pack 4, the cooling box 5 is located between the electric drive system 6 and the optimized battery pack 4, and the cooling box 5 is located on the left or right side of the frame.

[0051] The beneficial effects of adopting the above-mentioned further technical solution are: the integrated cooling box is fixed to one side of the frame, which, on the one hand, reduces the space used by components in the entire vehicle; on the other hand, since the cooling water tank is close to the electric drive system, the layout of the coolant pipeline is simplified.

[0052] like Figure 2 As shown, further, the cooling box 5 is connected to an evaporator inlet 23, the evaporator inlet 23 is connected to the evaporator, and a fan is installed near the evaporator.

[0053] The beneficial effect of adopting the above further technical solution is that it is easy to connect the cooling box and the evaporator.

[0054] The specific structure in the cooling box 5 is as follows: Figure 3 、 Figure 4 and Figure 5As shown: heat exchanger 8, three-way valve 9, expansion valve 10 are fixed on the left side plate, wherein the heat exchanger 8 itself is integrated with the expansion valve 10; the compressor 7, the battery water pump 11 and the radiator 20 are fixed on the bottom plate, the condenser 21 is fixed in front of the radiator 20, and the radiator 20 is fixed behind the radiator 20 for cooling the radiator 20, wherein the radiator 20 is divided into two chambers of motor cooling and battery cooling; the PTC heater 12, the four-way valve 13 and the cooling liquid inlet and outlet joint are fixed on the right side plate.

[0055] The connection mode of the cooling water pipes between the components is as shown in the figure ​ As shown, the components in the virtual box are outside the cooling box 5, and the arrow direction is the fluid flow direction. The power battery in the figure is an optimized battery pack 4, which is only named as an optimized battery pack different from the battery pack in the prior art, and the internal structure of the optimized battery pack has not changed. The fan is a cooling fan.

[0056] The outlet of the compressor 7 is connected with the inlet of the condenser 21, the refrigerant coming out of the compressor 7 can be cooled by the condenser 21, then one way enters the evaporator in the vehicle cabin (evaporator) after being depressurized by the expansion valve 10, to perform cabin cooling, and the other way enters the heat exchanger 8 to exchange heat with the cooling liquid coming out of the battery (optimized battery pack 4) to cool the battery (optimized battery pack 4), and the refrigerant coming out of the evaporator and the heat exchanger 8 returns to the compressor 7. The inlet and outlet of the cooling liquid channel of the heat exchanger are respectively connected with the B port of the three-way valve 9 and the inlet of the battery water pump 11, the outlet of the battery water pump 11 is connected with the 1 port of the four-way valve 13, and the 2 / 3 / 4 ports of the four-way valve 13 are respectively connected with the inlet of the PTC heater 12, the outlet of the electric drive system 6, the A port of the three-way valve and the inlet of the electric drive system 6. The cooling liquid coming out of the optimized battery pack 4 is divided into two ways through the cooling box battery cooling liquid outlet joint (battery pack cooling liquid outlet 19): one way to the battery radiator, using air convection of the cooling fan 22 to cool the battery (optimized battery pack); one way is connected to the C port of the three-way valve, and the cooling liquid exchanges heat with the refrigerant in the heat exchanger 8, then passes through the battery water pump 11-four-way valve 1, 2 channel-PTC heater-cooling box body battery cooling liquid inlet (battery pack cooling liquid inlet 15) in turn, and then enters the optimized battery pack for cooling. Different modes can be selected according to the actual temperature requirement of the battery.

[0057] The cooling liquid from the electric drive system can also be divided into two paths: one path is connected to the first electric drive system cooling liquid outlet 14 on the cooling box (cooling box 5), and then passes through the 2, 3 channels of the four-way valve, the PTC heater, the optimized battery pack, the B, C of the three-way valve, the heat exchanger 8, the battery water pump 11, the 1, 4 of the four-way valve, and then enters the motor cooling liquid inlet 1 (the first electric drive system cooling liquid inlet 16) on the cooling box, and then enters the electric drive system 6, and this mode is mainly to utilize the waste heat of the motor (electric drive system) to heat the optimized battery pack; the other path is connected to the motor cooling liquid outlet 2 (the second electric drive system cooling liquid outlet 18) on the cooling box, and then enters the motor radiator, and then passes through the motor cooling liquid inlet 2 (the second electric drive system cooling liquid inlet 17) on the cooling box (cooling box 5) to return to the electric drive system 6, and this mode is to cool the electric drive system.

[0058] 1. The position of the radiator is rearranged, and the radiator is far away from the battery pack (optimized battery pack 4).

[0059] 2. The radiator is integrated with the battery cooling unit.

[0060] Advantage 1: The traditional radiator arrangement is broken, the position of the radiator is rearranged, the battery pack has more use space, so that the battery can meet the demand of the whole vehicle in the limited use space, and in addition, the radiator is far away from the battery pack (optimized battery pack 4), which is beneficial to the heat dissipation of the battery pack (optimized battery pack 4).

[0061] Advantage 2: The radiator for cooling the motor is integrated with the battery cooling unit, and the integrated cooling tank is fixed on one side of the vehicle body, which reduces the use space of the parts in the whole vehicle, and on the other hand, since the cooling tank is close to the electric drive system, the arrangement of the cooling liquid pipeline is simplified.

[0062] In addition, the utility model further provides an electric tractor which comprises the electric tractor heat management integrated device of any one of the preceding aspects.

[0063] The beneficial effects of the technical scheme of the utility model are as follows: the radiator and the cooling unit of the electric drive system are integrated into a cooling tank and fixed on one side of the vehicle frame. After integration, the optimized battery pack has more use space. The position of the radiator is rearranged, and the radiator is far away from the optimized battery pack. The radiator is far away from the optimized battery pack, so that the heat dissipation of the battery is also improved. In addition, the electric drive system is mostly arranged below the driver's cabin, the cooling pipeline from the radiator to the electric drive system is relatively long, and the installation of the cooling pipeline is troublesome. After integration, the arrangement of the cooling pipeline is relatively simple.

[0064] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electric tractor thermal management integrated device, characterized in that: include: A vehicle frame, an optimized battery pack (4), an electric drive system (6), a heat dissipation water tank for the electric drive system (6), a cooling unit for cooling the battery, and a cooling box (5); the optimized battery pack (4) and the electric drive system (6) are both mounted on the vehicle frame; the heat dissipation water tank and the cooling unit are integrated in the cooling box (5); the cooling box (5) is connected to the optimized battery pack (4) and the electric drive system (6) respectively through pipelines; and the cooling box (5) is mounted on one side of the vehicle frame.

2. The electric tractor thermal management integrated device according to claim 1, characterized in that: The cooling box comprises: a compressor (7), a heat exchanger (8), a three-way valve (9), an expansion valve (10), a battery water pump (11), a PTC heater (12), a four-way valve (13), a radiator (20), a condenser (21), and a cooling fan (22); the heat exchanger (8), the three-way valve (9), and the expansion valve (10) are all mounted on the left side panel of the cooling box (5); the compressor (7), the battery water pump (11), and the radiator (20) are all mounted on the bottom plate of the cooling box (5); the condenser (21) and the cooling fan (22) are respectively mounted on the front and rear sides of the radiator (20); and the PTC heater (12) and the four-way valve (13) are mounted on the right side panel of the cooling box (5).

3. The electric tractor thermal management integrated device according to claim 2, characterized in that: The compressor (7) is connected to the condenser (21) through a pipeline, the condenser (21) is connected to the expansion valve (10) and the heat exchanger (8) through pipelines, the expansion valve (10) is connected to the evaporator through a pipeline, the evaporator and the heat exchanger (8) are both connected to the compressor (7) through pipelines, the coolant channel of the heat exchanger (8) is connected to the three-way valve (9) and the battery water pump (11) through pipelines, the battery water pump (11) is connected to the four-way valve (13) through pipelines, the four-way valve (13) is connected to the PTC heater (12), the electric drive system (6) and the three-way valve (9) through pipelines, the PTC heater (12) is connected to the optimized battery pack (4) through pipelines, and the optimized battery pack (4) is connected to the radiator (20) and the three-way valve (9) through pipelines.

4. The electric tractor thermal management integrated device according to claim 3, characterized in that: An expansion valve is integrated in the heat exchanger (8), and the radiator (20) includes a motor radiator and a battery radiator. The optimized battery pack (4) is connected to the battery radiator via a pipeline, and the electric drive system (6) is connected to the motor radiator via a pipeline.

5. The electric tractor thermal management integrated device according to claim 4, characterized in that: The port A of the three-way valve (9) is connected to the battery radiator through a pipeline, the port B of the three-way valve (9) is connected to the heat exchanger (8) through a pipeline, and the port C of the three-way valve (9) is connected to the optimized battery pack (4) and the battery radiator through pipelines respectively.

6. The electric tractor thermal management integrated device according to claim 4, characterized in that: Port 1 of the four-way valve (13) is connected to the battery water pump (11) through a pipeline, port 2 of the four-way valve (13) is connected to the PTC heater (12) through a pipeline, and port 3 of the four-way valve (13) and port 4 of the four-way valve (13) are both connected to the electric drive system (6) through pipelines.

7. The electric tractor thermal management integrated device according to claim 3, characterized in that: The cooling box (5) is connected to a first electric drive system coolant outlet (14), a battery pack coolant inlet (15), a first electric drive system coolant inlet (16), a second electric drive system coolant inlet (17), a second electric drive system coolant outlet (18), and a battery pack coolant outlet (19); the optimized battery pack (4) is connected to the radiator (20) and the three-way valve (9) respectively through the battery pack coolant outlet (19); the PTC heater (12) is connected to the battery pack coolant inlet (15) of the optimized battery pack (4) through a pipeline; the electric drive system (6) is connected to the first electric drive system coolant outlet (14), the first electric drive system coolant inlet (16), the second electric drive system coolant inlet (17), and the second electric drive system coolant outlet (18) respectively through a pipeline.

8. The electric tractor thermal management integrated device according to claim 1, characterized in that: The optimized battery pack (4) is located on the front side of the vehicle frame, the electric drive system (6) is located behind the optimized battery pack (4), the cooling box (5) is located between the electric drive system (6) and the optimized battery pack (4), and the cooling box (5) is located on the left or right side of the vehicle frame.

9. The electric tractor thermal management integrated device according to claim 1, characterized in that: The cooling box (5) is connected to an evaporator inlet (23), the evaporator inlet (23) is connected to an evaporator, and a fan is installed near the evaporator.

10. An electric tractor, characterized in that: An electric tractor thermal management integrated device comprising the above-mentioned one of claims 1 to 9.

Images