Liquid cooling temperature control system of electric truck

Abstract

The utility model discloses a liquid cooling temperature control system for an electric truck, which comprises a heat exchange unit, a heat dissipation unit, a cooling medium and a refrigerating unit, and the heat exchange unit comprises a first heat exchanger and a second heat exchanger; the radiating unit comprises a first radiator and a second radiator; wherein the first heat exchanger is arranged on a battery pack of the electric truck, and the second heat exchanger is arranged on a brake driving system of the electric truck; the combination mode between the radiators and the heat exchangers is changed by changing the opening condition of the valves on the pipelines, the first radiator and the second radiator can work independently and can also be used in parallel, and the first heat exchanger and the second heat exchanger can be switched among the independent working state, the parallel state and the series state. And the cooling requirements of the battery system and the brake driving system in different states can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle temperature control system especially relates to a kind of electric truck liquid cooling temperature control system. BACKGROUND

[0002] In the current electric truck, especially in electric truck for mine, battery cooling and drive cooling are two separate systems, wherein battery cooling adopts liquid cooling form, while drive cooling adopts air cooling form, since battery pack and drive system each has its optimum working temperature interval, and battery needs to be actively heated to ensure its performance in low temperature in addition to heat dissipation in high temperature, so in this case, electric truck for mine has the following deficiencies in practical application:

[0003] 1, drive adopts air cooling form, and air cooling system is relatively large in size, occupies the space position of truck for mine, increases the self weight of truck for mine, and reduces the load capacity of truck for mine;

[0004] 2, drive air cooling system must be installed with drive due to air duct requirement, and it has high requirement on space, and environmental influence problems such as dust and water need to be considered for air inlet and outlet;

[0005] 3, drive air cooling and battery water cooling two cooling systems are used independently, some devices cannot be shared, causing unnecessary waste of hardware resources;

[0006] 4, battery cooling and drive cooling two systems are used independently, when battery needs to be heated and drive needs to be cooled, heat loss leads to waste, and efficiency is relatively low;

[0007] 5, battery cooling and drive cooling work independently, causing low cooling efficiency and repeated waste problems. CONTENT OF UTILITY MODEL

[0008] In view of the above deficiencies of current electric truck temperature control system, the utility model provides a kind of electric truck liquid cooling temperature control system, can make different cooling systems both independently run and combined operation, improve energy utilization and cooling efficiency, and reduce the effect of energy consumption.

[0009] To achieve the above object, the embodiment of the utility model adopts the following technical scheme:

[0010] The application discloses an electric truck liquid cooling temperature control system, which comprises a heat exchange unit, a heat dissipation unit, a cooling medium and a refrigerating unit, wherein the heat exchange unit comprises a first heat exchanger and a second heat exchanger; the heat dissipation unit comprises a first heat radiator and a second heat radiator; the refrigerating unit comprises a refrigerating end and a heat dissipation end; the first heat radiator and the heat dissipation end form a first loop through a first water inlet pipeline, a first water return pipeline; the second heat radiator and the second heat exchanger form a second loop through a second water inlet pipeline and a second water return pipeline; the first heat exchanger and the refrigerating end form a third loop through a third water inlet pipeline and a third water return pipeline; a first driving valve is arranged on the first loop; a second driving valve is arranged on the second loop; a third driving pump is arranged on the third loop; the first heat radiator is connected with the second heat radiator in parallel through a first parallel pipeline group; the second heat exchanger is connected in series in the third loop through a series pipeline group; the second heat exchanger is connected with the first heat exchanger in parallel through a second parallel pipeline group; and valves are arranged in series on the second water inlet pipeline, the second water return pipeline, the third water inlet pipeline, the third water return pipeline, the first parallel pipeline group, the series pipeline group and the second parallel pipeline group.

[0011] According to an aspect of the application, the first parallel pipeline group comprises a first switching pipeline and a second switching pipeline; the series pipeline group comprises a third switching pipeline and a fifth switching pipeline; and the second parallel pipeline group comprises a fourth switching pipeline and a fifth switching pipeline.

[0012] According to an aspect of the application, the first switching pipeline connects the first water return pipeline and the second water return pipeline; the second switching pipeline connects the first water inlet pipeline and the second water inlet pipeline; the third switching pipeline connects the third water return pipeline and the second water return pipeline; the fourth switching pipeline connects the third water inlet pipeline and the second water return pipeline; and the fifth switching pipeline connects the third water return pipeline and the second water inlet pipeline.

[0013] According to an aspect of the application, a first switching valve is arranged on the first switching pipeline; a second switching valve is arranged on the second switching pipeline; a third switching valve is arranged on the third switching pipeline; a fourth switching valve is arranged on the fourth switching pipeline; a fifth switching valve is arranged on the fifth switching pipeline; a second loop water inlet valve is arranged on the second water inlet pipeline; a second loop water return valve is arranged on the second water return pipeline; a third loop water inlet valve is arranged on the third water inlet pipeline; and a third loop water return valve is arranged on the third water return pipeline.

[0014] According to an aspect of the application, the third loop water return valve is located between the connection position of the third switching pipeline and the third water return pipeline and the connection position of the fifth switching pipeline and the third water return pipeline; and the third loop water inlet valve is located between the refrigerating unit and the connection position of the fourth switching pipeline and the third water inlet pipeline.

[0015] According to one aspect of the utility model, the second heat exchanger forms a heat exchanger parallel circuit with the first heat exchanger through the fourth switching pipeline and the fifth switching pipeline, and the third drive pump is located at the overlapping part of the third circuit and the heat exchanger parallel circuit.

[0016] According to one aspect of the utility model, the second circuit backwater valve is located between the connection of the first switching pipeline and the second backwater pipeline and the connection of the third switching pipeline and the second backwater pipeline, and the second circuit backwater valve is located between the connection of the first switching pipeline and the second backwater pipeline and the connection of the fourth switching pipeline and the second backwater pipeline, and the second circuit water inlet valve is located between the connection of the second switching pipeline and the second water inlet pipeline and the connection of the fifth switching pipeline and the second water inlet pipeline.

[0017] According to one aspect of the utility model, the first switching valve, the second switching valve, the third switching valve, the fourth switching valve, the fifth switching valve, the second circuit water inlet valve, the second circuit backwater valve, the third circuit water inlet valve and the third circuit backwater valve are electric control valves.

[0018] According to one aspect of the utility model, the first heat exchanger is arranged at the battery pack of the electric truck, and the second heat exchanger is arranged at the brake drive system of the electric truck.

[0019] The utility model has the advantages of the following:

[0020] 1. Distributed installation can be adopted to improve space utilization; 2. The battery pack cooling, the freezer unit cooling and the drive brake cooling are uniformly adopted liquid cooling temperature control, the device has high universality, and the maintenance cost can be reduced; 3. The battery pack cooling, the freezer unit cooling and the drive brake cooling can be independently operated or combined according to different working conditions, and the output power of the drive pump, the radiator and the freezer unit can be adjusted according to actual cooling needs, so that energy loss can be reduced, and service life can be improved; 4. The switching combination mode can utilize the heat generated by the brake drive system to heat the battery pack, and energy consumption can be reduced; 5. The combination of multiple modes can improve the redundancy of the system and improve stability. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 It is a structural schematic diagram of the electric truck liquid cooling temperature control system.

[0023] Diagram descriptions: 11. First heat exchanger; 12. Second heat exchanger; 21. First radiator; 22. Second radiator; 3. Refrigeration unit; 41. First drive pump; 42. Second drive pump; 43. Third drive pump; 51. First switching valve; 52. Second switching valve; 53. Third switching valve; 54. Fourth switching valve; 55. Fifth switching valve; 61. Second loop inlet valve; 62. Second loop return valve; 63. Third loop inlet valve; 64. Third loop return valve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1 As shown, an electric truck liquid-cooled temperature control system includes a heat exchange unit, a heat dissipation unit, a cooling medium, and a refrigeration unit 3. The heat exchange unit includes a first heat exchanger 11 and a second heat exchanger 12; the heat dissipation unit includes a first radiator 21 and a second radiator 22; the refrigeration unit 3 includes a cooling end and a heat dissipation end; the first radiator 21 forms a first circuit with the heat dissipation end through a first inlet pipe and a first return pipe; the second radiator 22 forms a second circuit with the second heat exchanger 12 through a second inlet pipe and a second return pipe; the cooling end is connected to the second heat exchanger 12 through a third inlet pipe and a third return pipe. A third loop is formed with the first heat exchanger 11; a first drive valve is installed on the first loop; a second drive valve is installed on the second loop; a third drive pump 43 is installed on the third loop; the first radiator 21 is connected in parallel with the second radiator 22 through a first parallel pipe group; the second heat exchanger 12 is connected in series in the third loop through a series pipe group; the second heat exchanger 12 is connected in parallel with the first heat exchanger 11 through a second parallel pipe group; valves are connected in series on the second inlet pipe, the second return pipe, the third inlet pipe, the third return pipe, the first parallel pipe group, the series pipe group, and the second parallel pipe group;

[0026] The first heat exchanger 11 is installed in the battery pack of the electric truck, and the second heat exchanger 12 is installed in the braking drive system of the electric truck. By changing the opening status of the valves on the pipeline, the combination of the radiators and heat exchangers can be changed. The first radiator 21 and the second radiator 22 can work independently or be used in parallel. The first heat exchanger 11 and the second heat exchanger 12 can switch between three states: working independently, parallel, and series, which can meet the cooling requirements of the battery system and the braking drive system under different conditions.

[0027] In the embodiment, the first parallel pipeline group comprises a first switching pipeline and a second switching pipeline; the serial pipeline group comprises a third switching pipeline and a fifth switching pipeline; and the second parallel pipeline group comprises a fourth switching pipeline and a fifth switching pipeline.

[0028] The specific connection mode is that the first switching pipeline connects the first return water pipeline and the second return water pipeline; the second switching pipeline connects the first water inlet pipeline and the second water inlet pipeline; the third switching pipeline connects the third return water pipeline and the second return water pipeline; the fourth switching pipeline connects the third water inlet pipeline and the second return water pipeline; and the fifth switching pipeline connects the third return water pipeline and the second water inlet pipeline.

[0029] To realize the switching of the combination mode, a valve is arranged on each switching pipeline to control the on-off of the corresponding switching pipeline. Specifically, a first switching valve 51 is arranged on the first switching pipeline; a second switching valve 52 is arranged on the second switching pipeline; a third switching valve 53 is arranged on the third switching pipeline; a fourth switching valve 54 is arranged on the fourth switching pipeline; and a fifth switching valve 55 is arranged on the fifth switching pipeline.

[0030] Correspondingly, a second loop water inlet valve 61 is arranged on the second water inlet pipeline; a second loop return water valve 62 is arranged on the second return water pipeline; a third loop water inlet valve 63 is arranged on the third water inlet pipeline; and a third loop return water valve 64 is arranged on the third return water pipeline.

[0031] The first heat exchanger 11 and the heat dissipation end of the refrigeration unit 3 constitute the refrigeration unit 3 cooling, the refrigeration end of the refrigeration unit 3 and the first heat sink 21 constitute the battery pack cooling, and the second heat exchanger 12 and the second heat sink 22 constitute the brake drive system cooling. When the switching valves on the first to fifth switching pipelines are all closed, the water inlet valves, the return water valves on the first to third loops, and the drive pumps are all opened, the refrigeration unit 3 cooling, the battery pack cooling, and the brake drive system cooling work independently.

[0032] The third loop return water valve 64 is located between the connection between the third switching pipeline and the third return water pipeline and the connection between the fifth switching pipeline and the third return water pipeline; and the third loop water inlet valve 63 is located between the refrigeration unit 3 and the connection between the fourth switching pipeline and the third water inlet pipeline.

[0033] The second heat exchanger 12 forms a heat exchanger parallel loop circuit with the first heat exchanger 11 through the fourth switching pipeline and the fifth switching pipeline; in actual use, the third drive pump 43 should be located in the overlapping part of the third loop and the heat exchanger parallel loop circuit.

[0034] The second loop backwater valve 62 is located between the connection of the first switching pipeline and the second backwater pipeline and the connection of the third switching pipeline and the second backwater pipeline; the second loop backwater valve 62 is located between the connection of the first switching pipeline and the second backwater pipeline and the connection of the fourth switching pipeline and the second backwater pipeline; the second loop water inlet valve 61 is located between the connection of the second switching pipeline and the second water inlet pipeline and the connection of the fifth switching pipeline and the second water inlet pipeline.

[0035] The first switching valve 51, the second switching valve 52, the third switching valve 53, the fourth switching valve 54, the fifth switching valve 55, the second loop water inlet valve 61, the second loop backwater valve 62, the third loop water inlet valve 63 and the third loop backwater valve 64 are electrically controlled valves.

[0036] Compared with the traditional electric truck cooling system, the battery cooling is liquid cooling, and the drive cooling is air cooling, the two cooling systems work independently, the device sharing rate is low, and it is not convenient to maintain and maintain, most of the components of the temperature control system in the application, such as valves, drive pumps and pipelines, can adopt the same specifications, and the device sharing rate is greatly improved.

[0037] In addition, the liquid cooling temperature control system does not need to consider the arrangement of the air duct, can adopt distributed installation, and can improve the space utilization rate of the truck.

[0038] For different use conditions of the electric truck, especially the mine electric truck, the liquid cooling temperature control system in the embodiment has at least the following working states:

[0039] State 1, general case: the first loop, the second loop and the third loop do not interfere with each other, the refrigerating unit 3 cooling, the battery pack cooling and the brake drive system cooling are cooled according to the needs, at this time, the switching valves on the first to fifth switching pipelines are all closed, the water inlet valves, the backwater valves and the drive pumps on the first to third loops are all opened, and the three cooling loops decide whether to start and the power of the drive pump of the corresponding loop according to the environmental temperature;

[0040] State 2, the ambient temperature is too low, the battery pack needs to be heated, and the heat generated by the brake drive system can be used to heat the battery pack: at this time, the first drive pump 41 and the second drive pump 42 are closed; the second circuit inlet valve 61 and the second circuit return valve 62 are closed, and the second radiator 22 is cut out of the second circuit; the third circuit inlet valve 63 and the third circuit return valve 64 are closed, and the refrigeration end of the refrigerating unit 3 is cut out of the third circuit; the third switch valve 53 is closed, the fourth switch valve 54 and the fifth switch valve 55 are opened, and the third drive pump 43 is opened; the first heat exchanger 11 and the second heat exchanger 12 form a circulating loop through the fourth switch pipeline and the fifth switch pipeline, and the heat generated by the brake drive system of the electric truck when it is running can be transferred to the battery pack, heating the battery pack while ensuring that the brake drive system will not overheat, saving energy;

[0041] State 3, when the electric truck is in fast charging and the brake drive system does not need to run, the battery pack needs more cooling than usual for a short time, and the brake drive system does not need to be cooled, specifically, the second drive pump 42, the second circuit inlet valve 61 and the second circuit return valve 62 are closed; the first switch valve 51, the second switch valve 52 and the first drive pump 41 are opened; the third switch valve 53, the fourth switch valve 54 and the fifth switch valve 55 remain closed; the third circuit inlet valve 63, the third circuit return valve 64 and the third drive pump 43 are opened; at this time, the first radiator 21 and the second radiator 22 are used in parallel to speed up the heat dissipation of the refrigerating unit 3, thereby rapidly cooling the battery pack;

[0042] State 4, when the ambient temperature is high, the heat dissipation of the brake drive system alone cannot meet the requirements, and further improvement of the heat dissipation efficiency is needed, the first heat exchanger 11 and the second heat exchanger 12 are connected in series at the refrigeration end of the refrigerating unit 3, and the first radiator 21 and the second radiator 22 are connected in parallel at the heat dissipation end of the refrigerating unit 3; specifically, the second drive pump 42, the second circuit inlet valve 61 and the second circuit return valve 62 are closed; the first switch valve 51, the second switch valve 52 and the first drive pump 41 are opened; the third switch valve 53 and the fifth switch valve 55 are opened, and the fourth switch valve 54 and the third circuit return valve 64 are closed; the third circuit inlet valve 63 and the third drive pump 43 are opened; the cooling medium at the refrigeration end of the refrigerating unit 3 first cools the battery pack through the first heat exchanger 11 and then cools the brake drive system through the second heat exchanger 12 (as shown in Figure 1 , the cooling medium is discharged from the water outlet end of the refrigeration end of the refrigerating unit 3, enters the first heat exchanger 11 inlet end through the second circuit inlet valve 61, enters the second heat exchanger 12 inlet end from the first heat exchanger 11 outlet end and the fifth switch pipeline, and flows into the refrigeration end of the refrigerating unit 3 from the second heat exchanger 12 outlet end and the third switch pipeline);

[0043] Different combinations can be used for different working conditions, so as to fully utilize the refrigeration resources or heat of the system, improve the energy utilization rate, and reduce the loss; during operation, the output power can be adjusted according to the temperature of each heat generating component, so as to be more energy-saving; the two radiators can be used independently or in parallel, and the two groups of heat exchangers can be switched between independent operation, series connection and parallel connection; when one of the radiators fails, the connection mode can be changed through valve action to meet the heat dissipation demand of the system, ensure the normal operation of the system, and improve the stability.

[0044] The embodiment of the utility model has the advantages of:

[0045] 1. Distributed installation can be used to improve the space utilization rate; 2. The battery pack cooling, freezer unit cooling and drive braking cooling are uniformly cooled by liquid cooling temperature control, the device has high universality, and the maintenance cost can be reduced; 3. The battery pack cooling, freezer unit cooling and drive braking cooling can be independently operated or combined according to different working conditions, and the output power of the drive pump, radiator and freezer unit can be adjusted according to the actual cooling requirement, so as to reduce the energy loss and improve the service life; 4. The switching combination mode can utilize the heat generated by the braking drive system to heat the battery pack, so as to reduce the energy consumption; 5. The combination of multiple modes can improve the redundancy of the system and improve the stability.

[0046] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. An electric truck liquid cooling temperature control system comprising a heat exchange unit, a heat dissipation unit, and a cooling medium, characterized in that, The heat exchange unit comprises a first heat exchanger (11) and a second heat exchanger (12); the heat dissipation unit comprises a first heat dissipator (21) and a second heat dissipator (22); the refrigeration unit (3) comprises a refrigeration end and a heat dissipation end; the first heat dissipator (21) forms a first loop with the heat dissipation end through a first water inlet pipeline, a first water return pipeline; the second heat dissipator (22) forms a second loop with the second heat exchanger (12) through a second water inlet pipeline, a second water return pipeline; the refrigeration end forms a third loop with the first heat exchanger (11) through a third water inlet pipeline, a third water return pipeline; a first drive valve is arranged on the first loop; a second drive valve is arranged on the second loop; a third drive pump (43) is arranged on the third loop; the first heat dissipator (21) is connected in parallel with the second heat dissipator (22) through a first parallel pipeline group; the second heat exchanger (12) is connected in series in the third loop through a series pipeline group; the second heat exchanger (12) is connected in parallel with the first heat exchanger (11) through a second parallel pipeline group; valves are connected in series on the second water inlet pipeline, the second water return pipeline, the third water inlet pipeline, the third water return pipeline, the first parallel pipeline group, the series pipeline group and the second parallel pipeline group.

2. The electric truck liquid-cooled thermal control system of claim 1, wherein, The first parallel pipeline group comprises a first switching pipeline and a second switching pipeline; the series pipeline group comprises a third switching pipeline and a fifth switching pipeline; and the second parallel pipeline group comprises a fourth switching pipeline and a fifth switching pipeline.

3. The electric truck liquid-cooled thermal control system of claim 2, wherein, The first switching pipeline connects the first water return pipeline and the second water return pipeline; the second switching pipeline connects the first water inlet pipeline and the second water inlet pipeline; the third switching pipeline connects the third water return pipeline and the second water return pipeline; the fourth switching pipeline connects the third water inlet pipeline and the second water return pipeline; and the fifth switching pipeline connects the third water return pipeline and the second water inlet pipeline.

4. The electric truck liquid-cooled thermal control system of claim 3, wherein, A first switching valve (51) is arranged on the first switching pipeline; a second switching valve (52) is arranged on the second switching pipeline; a third switching valve (53) is arranged on the third switching pipeline; a fourth switching valve (54) is arranged on the fourth switching pipeline; a fifth switching valve (55) is arranged on the fifth switching pipeline; a second loop water inlet valve (61) is arranged on the second water inlet pipeline; a second loop water return valve (62) is arranged on the second water return pipeline; a third loop water inlet valve (63) is arranged on the third water inlet pipeline; and a third loop water return valve (64) is arranged on the third water return pipeline.

5. The electric truck liquid-cooled thermal control system of claim 4, wherein, The third loop water return valve (64) is located between the connection between the third switching pipeline and the third water return pipeline and the connection between the fifth switching pipeline and the third water return pipeline; and the third loop water inlet valve (63) is located between the refrigeration unit (3) and the connection between the fourth switching pipeline and the third water inlet pipeline.

6. The electric truck liquid-cooled thermal control system of claim 4, wherein, The second heat exchanger (12) forms a heat exchanger parallel loop with the first heat exchanger (11) through the fourth switching pipeline and the fifth switching pipeline; and the third drive pump (43) is located in the overlapping part of the third loop and the heat exchanger parallel loop.

7. The electric truck liquid cooling thermal control system of claim 4, wherein, The second loop backwater valve (62) is located between the connection of the first switching pipeline and the second backwater pipeline and the connection of the third switching pipeline and the second backwater pipeline; the second loop backwater valve (62) is located between the connection of the first switching pipeline and the second backwater pipeline and the connection of the fourth switching pipeline and the second backwater pipeline; the second loop water inlet valve (61) is located between the connection of the second switching pipeline and the second water inlet pipeline and the connection of the fifth switching pipeline and the second water inlet pipeline.

8. The electric truck liquid-cooled thermal control system of claim 4, wherein, The first switching valve (51), the second switching valve (52), the third switching valve (53), the fourth switching valve (54), the fifth switching valve (55), the second loop water inlet valve (61), the second loop backwater valve (62), the third loop water inlet valve (63) and the third loop backwater valve (64) are electrically controlled valves.

9. The electric truck liquid cooling thermal control system of claim 1, wherein, The first heat exchanger (11) is arranged at the battery pack of the electric truck; and the second heat exchanger (12) is arranged at the brake driving system of the electric truck.

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