Heat management system for pure electric vehicle in cooperation with charging pile

Abstract

The application provides a pure electric vehicle and charging pile cooperative heat management system; the system comprises a passenger cabin refrigeration unit, a battery refrigeration unit and a charging pile cooling unit; the battery refrigeration unit comprises a cooler and a water cooling plate; the cooler has a plurality of parallel arranged heat exchange channels; the water cooling plate and one of the heat exchange channels constitute a first refrigeration circuit; another heat exchange channel of the cooler is connected in parallel with the passenger cabin refrigeration unit, so that the heat exchange channel and the passenger cabin refrigeration unit constitute a second refrigeration circuit; and another heat exchange channel of the cooler can be connected in series with the charging pile cooling unit, so that the heat exchange channel and the charging pile cooling unit constitute a cooling circuit; the application makes full use of the refrigeration performance of the charging pile to empower the vehicle; the vehicle only needs to be configured to meet the heat management demand under the driving condition, and does not need to match the high-performance heat management system for the fast charging condition, so that the cost and the vehicle quality can be reduced, and the cruising range is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy commercial vehicles, in particular to a heat management system for pure electric vehicles and charging piles. BACKGROUND

[0002] At present, the problem of endurance mileage of new energy commercial vehicles has always been a great difficulty for engineers. In order to increase the endurance mileage of new energy pure electric commercial vehicles, there are mainly three ways: first, for the vehicle itself, design a high-efficiency high-voltage power distribution system, a high-energy-density power battery, a high-efficiency central motor or electric drive axle system, and a more reasonable energy utilization vehicle thermal management system. The second is to increase the power of the vehicle carrying the battery. This idea is more direct, and currently there are main machine factories with 800kwh of power. The third is to improve the charging speed, and high-voltage platform high-power charging is also an effective means to solve the mileage problem.

[0003] For the third way mentioned above, the first problem to be solved while charging is the heat generation of the battery. In actual application, it is found that when the large-capacity and high-power charging system is running, the heat generation of the battery will be large, which requires the vehicle to be matched with a higher performance thermal management system. However, under the driving condition, the heat generation of the battery is not high, and matching a higher performance thermal management system will cause performance and cost waste.

[0004] Therefore, a pure electric vehicle and charging pile cooperative thermal management system is urgently needed to solve the technical problems existing in the prior art to some extent. SUMMARY

[0005] The purpose of the present application is to provide a pure electric vehicle and charging pile cooperative thermal management system, which utilizes the refrigeration performance of the charging pile to empower the vehicle, and the vehicle only needs to be configured with a thermal management system that meets the thermal management requirements under the driving condition, without the need to match a high-performance thermal management system for fast charging condition. To some extent, it can reduce the cost, reduce the vehicle quality, and increase the endurance mileage.

[0006] The present application provides a pure electric vehicle and charging pile cooperative thermal management system; for battery refrigeration; comprising a passenger compartment refrigeration unit, a battery refrigeration unit and a charging pile cooling unit;

[0007] The battery refrigeration unit comprises a cooler and a water-cooled plate capable of heat exchange with the battery, the cooler has a plurality of parallel arranged heat exchange channels, and the water-cooled plate and one of the heat exchange channels constitute a first refrigeration circuit;

[0008] Another heat exchange channel of the cooler is connected in parallel with the passenger compartment refrigeration unit, so that the heat exchange channel and the passenger compartment refrigeration unit constitute a second refrigeration circuit;

[0009] Another heat exchange channel of the cooler can be connected in series with the charging pile cooling unit, so that the heat exchange channel and the charging pile cooling unit form a cooling loop.

[0010] The first refrigeration circuit can exchange heat with the second refrigeration circuit and the cooling loop, respectively, so that the battery reaches a preset temperature under a preset working condition.

[0011] In the above technical solution, further, the cooler has three parallelly arranged heat exchange channels, namely a first heat exchange channel, a second heat exchange channel and a third heat exchange channel.

[0012] The water-cooled plate has a cooling pipeline arranged in a zigzag shape inside, which can exchange heat with the battery.

[0013] The inlet and outlet of the cooling pipeline are respectively connected in correspondence with the inlet and outlet of the first heat exchange channel, so that the cooling pipeline and the first heat exchange channel form the first refrigeration circuit.

[0014] In the above technical solution, further, a water pump is arranged between the inlet of the cooling pipeline and the inlet of the first heat exchange channel, which is used to realize the circulation of the coolant in the first refrigeration circuit.

[0015] In the above technical solution, further, the passenger compartment refrigeration unit includes a compressor, a condenser and an evaporator.

[0016] The compressor, the condenser and the evaporator are connected in series to form a passenger compartment refrigeration circuit.

[0017] The condenser has two refrigerant outlets, the evaporator is connected in communication with one of the refrigerant outlets through a first pipeline, one end of the second heat exchange channel is connected in communication with the compressor and the other end is connected in communication with the other refrigerant outlet through a second pipeline, so that the second heat exchange channel is connected in parallel with the passenger compartment refrigeration unit.

[0018] In the above technical solution, further, a first expansion valve is arranged on the first pipeline, and a second expansion valve is arranged on the second pipeline.

[0019] In the above technical solution, further, the charging pile cooling unit includes a refrigeration machine.

[0020] One end of the third heat exchange channel is connected in communication with the inlet of the refrigeration machine through a cooling outlet pipe, and the other end is connected in communication with the outlet of the refrigeration machine through a cooling inlet pipe.

[0021] In the above technical solution, further, the charging pile cooling unit further includes a charging power supply.

[0022] The charging power supply is capable of communicating with the battery through a high-voltage wire harness.

[0023] In the technical solution, further, the heat management system of the pure electric vehicle and the charging pile cooperates further includes a controller.

[0024] The controller is electrically connected with the first expansion valve and the second expansion valve, and the controller can control the opening or closing of the first expansion valve and the second expansion valve to control the opening or closing of the passenger cabin refrigeration unit and the opening or closing of the second heat exchange channel.

[0025] In the technical solution, further, the heat management system of the pure electric vehicle and the charging pile cooperates further includes the following control modes: the passenger cabin independent refrigeration control mode during vehicle driving; the battery and passenger cabin bidirectional refrigeration control mode during vehicle driving; the battery independent refrigeration control mode during vehicle driving; the battery independent refrigeration control mode at a first preset temperature during vehicle charging; the battery and passenger cabin bidirectional refrigeration control mode during vehicle charging; and the battery independent control mode at a second preset temperature during vehicle charging.

[0026] In the technical solution, further, the passenger cabin independent refrigeration control mode during vehicle driving is that the controller controls the first expansion valve to open and the second expansion valve to close; the compressor, the condenser and the evaporator work, so that the refrigerant flows in the compressor, the condenser, the first expansion valve, the evaporator and the compressor in sequence.

[0027] The battery and passenger cabin bidirectional refrigeration control mode during vehicle driving is that the controller controls the first expansion valve and the second expansion valve to open; the compressor, the condenser, the cooler, the evaporator and the water pump work, so that the refrigerant flows in two paths, the first path is in the compressor, the condenser, the second expansion valve, the second heat exchange channel of the cooler and the compressor in sequence, and the second path is in the compressor, the condenser, the first expansion valve and the compressor in sequence, and the cooling liquid flows in the water pump, the first heat exchange channel of the cooler, the water-cooled plate and the water pump in sequence.

[0028] The battery independent refrigeration control mode during vehicle driving is that the controller controls the first expansion valve to close and the second expansion valve to open; the compressor, the condenser, the cooler and the water pump work, so that the cooling liquid flows in the water pump, the first heat exchange channel of the cooler, the water-cooled plate and the water pump in sequence, and the refrigerant flows in the compressor, the condenser, the second expansion valve, the second heat exchange channel of the cooler and the compressor in sequence.

[0029] In the battery independent refrigeration control mode at the first preset temperature during the vehicle charging process, the controller controls the first expansion valve to be closed and the second expansion valve to be closed; the refrigerating machine and the water pump work, and the cooling liquid is divided into first and second paths for circulation. The first path cooling liquid flows through the water pump, the first heat exchange channel of the cooler, the water-cooled plate, and the water pump in sequence. The second path cooling liquid flows through the refrigerating machine, the cooling inlet pipe, the third heat exchange channel of the cooler, the cooling outlet pipe, and the refrigerating machine in sequence.

[0030] In the battery and passenger cabin bidirectional refrigeration control mode during the vehicle charging process, the first expansion valve is opened, and the second expansion valve is closed; the compressor, the condenser, the evaporator, and the water pump work; the refrigerant flows through the compressor, the condenser, the first expansion valve, the evaporator, and the compressor in sequence; the cooling liquid is divided into first and second paths for circulation. The first path cooling liquid flows through the water pump, the first heat exchange channel of the cooler, the water-cooled plate, and the water pump in sequence. The second path cooling liquid flows through the refrigerating machine, the cooling inlet pipe, the third heat exchange channel of the cooler, the cooling outlet pipe, and the refrigerating machine in sequence.

[0031] In the battery independent control mode at the second preset temperature during the vehicle charging process, the first expansion valve is closed, and the second expansion valve is opened; the compressor, the condenser, the cooler, the water pump, and the refrigerating machine work; the refrigerant flows through the compressor, the condenser, the second expansion valve, the second heat exchange channel of the cooler, and the compressor in sequence. The cooling liquid is divided into first and second paths for circulation. The first path cooling liquid flows through the water pump, the first heat exchange channel of the cooler, the water-cooled plate, and the water pump in sequence. The second path cooling liquid flows through the refrigerating machine, the cooling inlet pipe, the third heat exchange channel of the cooler, the cooling outlet pipe, and the refrigerating machine in sequence.

[0032] Compared with the prior art, the present application has the following beneficial effects:

[0033] The present application provides a pure electric vehicle and charging pile cooperative thermal management system; for battery refrigeration; including a passenger cabin refrigeration unit, a battery refrigeration unit, and a charging pile cooling unit;

[0034] The battery refrigeration unit includes a cooler and a water-cooled plate capable of heat exchange with the battery. The cooler has a plurality of parallel arranged heat exchange channels. The water-cooled plate and one of the heat exchange channels form a first refrigeration circuit.

[0035] Another heat exchange channel of the cooler is connected in parallel to the passenger cabin refrigeration unit, so that the heat exchange channel and the passenger cabin refrigeration unit form a second refrigeration circuit.

[0036] Another heat exchange channel of the cooler can be connected in series with the charging pile cooling unit so that the heat exchange channel and the charging pile cooling unit form a cooling circuit;

[0037] The first refrigeration circuit can exchange heat with the second refrigeration circuit and the cooling circuit respectively, so that the battery can reach a preset temperature under preset operating conditions.

[0038] In summary, this application fully utilizes the cooling performance of charging piles to power vehicles. The vehicle configuration only needs to meet the thermal management requirements under driving conditions, without the need for a high-performance thermal management system for fast charging conditions. This can reduce costs, decrease the overall vehicle weight, and increase the driving range. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0040] Figure 1 A block diagram of the thermal management system for the coordinated operation of pure electric vehicles and charging piles provided in this application.

[0041] Reference numerals in the attached diagram: 1-First heat exchange channel; 2-Second heat exchange channel; 3-Third heat exchange channel; 4-Battery; 5-Water pump; 6-First pipeline; 7-Second pipeline; 8-First expansion valve; 9-Second expansion valve; 10-High voltage wiring harness; 11-Cooling water outlet pipe; 12-Cooling water inlet pipe; 13-Quick connector; 14-High voltage wiring plug. Detailed Implementation

[0042] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0043] The features described can be implemented in different ways, and are not to be interpreted as being limited to the examples described herein. Rather, the examples are provided as a description of embodiments that, as of this time and based on knowledge of the applicant, represent the most practical and preferred implementations of the methods, devices and / or systems described herein.

[0044] Throughout the specification, when an element (such as a layer, region or substrate) is referred to as being "on" another element, "connected to" another element, "coupled to" another element, "adjacent to" another element, "on top of" another element or "covering" another element, it can be directly on, connected, coupled, adjacent, on top of, or covering the other element, or one or more other elements can be interposed therebetween. In contrast, when an element is referred to as being "directly on", "directly connected to", "directly coupled to", "directly adjacent to", "directly on top of", or "directly covering" another element, there are no other elements interposed therebetween.

[0045] As used herein, the term "and / or" includes any one of the listed items and any combination of any two or more of the listed items.

[0046] Although terms such as "first", "second" and "third" can be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections are not limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, the element, component, region, layer or section referred to as the first element, component, region, layer or section in the examples described herein can also be referred to as the second element, component, region, layer or section without departing from the teachings of the examples.

[0047] For ease of description, spatial relationship terms, such as "on", "upper", "below", and "lower", can be used herein to describe the relationship between one element and another element as shown in the drawings. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over, the element described as being on or above other elements would then be oriented on or below the other elements. Accordingly, the term "on" encompasses both an "on" and an "under" orientation in accordance with the spatial orientation of the device. The device can also be oriented in other ways (e.g., rotated 90 degrees or at other orientations) and the spatial relationship terms used herein will be interpreted accordingly.

[0048] The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including" and "has" are inclusive and permit the presence of one or more other features, numbers, operations, members, elements and / or combinations thereof, but do not exclude the presence or addition of one or more other features, numbers, operations, members, elements and / or combinations thereof.

[0049] Variations in the shapes illustrated in the drawings can occur as a result of manufacturing processes and / or tolerances. Thus, the examples described herein are not limited to the specific shapes illustrated in the drawings, but include variations in shapes that occur during manufacturing.

[0050] Features of the examples described herein can be combined with one another in a variety of ways. Furthermore, although the examples described herein have various configurations, other configurations are possible.

[0051] The following detailed description Figure 1 The detailed description provides a pure electric vehicle and charging pile cooperative thermal management system.

[0052] The present application provides a pure electric vehicle and charging pile cooperative thermal management system for a large-capacity, high-power charging pure electric commercial vehicle system; the system utilizes the refrigeration performance of the charging pile to empower the vehicle, and the vehicle can meet the thermal management requirements under the driving condition without matching the high-performance thermal management system for fast charging condition, which can reduce the cost, reduce the vehicle quality and increase the cruising range.

[0053] Specifically, the pure electric vehicle and charging pile cooperative thermal management system includes a passenger compartment refrigeration unit, a battery 4 refrigeration unit, and a charging pile cooling unit.

[0054] Specifically, the battery 4 refrigeration unit includes a cooler and a water-cooled plate capable of heat exchange with the battery 4. In actual application, the battery 4 can be directly placed on the water-cooled plate. Specifically, a limiting groove can be formed on the water-cooled plate, and the battery 4 can be placed in the limiting groove. The above installation method is understood by those skilled in the art, or other realizable structures can be thought of. Further, the cooler has a plurality of parallel heat exchange channels, and the water-cooled plate and one of the heat exchange channels constitute a first refrigeration circuit.

[0055] Preferably, the model of the cooler is H616503-01.

[0056] Specifically, the other heat exchange channel of the cooler is connected in parallel with the passenger compartment refrigeration unit, so that the heat exchange channel and the passenger compartment refrigeration unit constitute a second refrigeration circuit.

[0057] Specifically, the another heat exchange channel of the cooler can be connected in series with the charging pile cooling unit, and in particular, when the battery 4 is electrically connected with the charging pile and the battery 4 is charged by the charging pile, the another heat exchange channel of the cooler can be connected in series in the charging pile cooling unit, so that the heat exchange channel and the charging pile cooling unit form a cooling loop.

[0058] In actual use, the first refrigeration circuit can exchange heat with the second automatic circuit, and the first refrigeration circuit can also exchange heat with the cooling circuit. Specifically, according to the actual working condition and the temperature of the battery 4, different heat exchange circuits are selected.

[0059] In summary, the application makes full use of the refrigeration performance of the charging pile to empower the vehicle. The vehicle only needs to be configured to meet the thermal management needs under driving conditions, without the need to match a high-performance thermal management system for fast charging conditions, which can reduce costs, reduce vehicle weight, and increase range.

[0060] In this embodiment, in combination with Figure 1 As shown in the figure, the cooler has three parallelly arranged heat exchange channels, namely a first heat exchange channel 1, a second heat exchange channel 2, and a third heat exchange channel 3.

[0061] Specifically, the water-cooled plate has a cooling pipeline arranged in a zigzag shape inside, which can exchange heat with the battery 4.

[0062] Specifically, the inlet of the cooling pipeline is in communication with the inlet of the first heat exchange channel 1, and the outlet of the cooling pipeline is in communication with the outlet of the first heat exchange channel 1, so that the cooling pipeline and the first heat exchange channel 1 form a first refrigeration circuit, and direct heat exchange of the battery 4 can be realized by using the first refrigeration circuit.

[0063] Further, a water pump 5 is arranged between the inlet of the cooling pipeline and the inlet of the first heat exchange channel 1, and the water pump 5 is used to circulate the coolant in the first refrigeration circuit.

[0064] In this embodiment, in combination with Figure 1 As shown in the figure, the passenger compartment refrigeration unit includes a compressor, a condenser, and an evaporator.

[0065] Specifically, the compressor, the condenser, and the evaporator are connected in series to form a passenger compartment refrigeration circuit.

[0066] Specifically, the condenser has two refrigerant outlets; the evaporator is in communication with one of the refrigerant outlets through a first pipeline 6; one end of the second heat exchange channel 2 is in communication with the compressor, and the other end is in communication with the other refrigerant outlet through a second pipeline 7, so that the second heat exchange channel 2 is connected in parallel with the passenger compartment refrigeration unit.

[0067] Further, the first pipeline 6 is provided with a first expansion valve 8; the second pipeline 7 is provided with a second expansion valve 9.

[0068] In actual use, when the first expansion valve 8 is closed and the second expansion valve 9 is opened, that is, when the second pipeline 7 is in communication with the second heat exchange channel 2, the second heat exchange channel 2 can exchange heat with the first heat exchange channel 1, thereby reducing the temperature of the medium in the first heat exchange channel 1, and the reduction of the medium temperature can further realize the refrigeration of the battery 4.

[0069] In this embodiment, in combination with Figure 1 As shown, the charging pile cooling unit comprises a refrigeration machine; specifically, one end of the third heat exchange channel 3 is in communication with the inlet of the refrigeration machine through a cooling outlet water pipe 11, and the other end is in communication with the outlet of the refrigeration machine through a cooling inlet water pipe 12.

[0070] Further, the charging pile cooling unit further comprises a charging power supply; the charging power supply can be in communication with the battery 4 through a high-voltage wire harness 10.

[0071] To sum up, in actual use, when the battery 4 is charged, the battery 4 will generate a lot of heat during charging, and the refrigeration machine of the charging pile is used to realize the refrigeration of the battery 4; further, when the battery 4 is charged by the high-voltage connector plug 14, the cooling outlet water pipe 11 is in communication with the inlet of the refrigeration machine, and the cooling inlet water pipe 12 is in communication with the outlet of the refrigeration machine; when the battery 4 is charged, the third heat exchange channel 3 exchanges heat with the first heat exchange channel 1, thereby realizing rapid cooling of the battery 4.

[0072] In this embodiment, the heat management system of the pure electric vehicle and the charging pile in cooperation further comprises a controller; the controller is electrically connected with the first expansion valve 8 and the second expansion valve 9, and the controller can control the opening or closing of the first expansion valve 8 and the second expansion valve 9 to control the opening or closing of the passenger compartment refrigeration unit and the opening or closing of the second heat exchange channel 2.

[0073] It is worth noting that the control here refers to the controller on the vehicle, and there is no need to additionally configure a controller.

[0074] In this embodiment, the heat management system of the pure electric vehicle and the charging pile in cooperation comprises the following control modes: passenger compartment independent refrigeration control mode during vehicle driving; battery 4 and passenger compartment bidirectional refrigeration control mode during vehicle driving; battery 4 independent refrigeration control mode during vehicle driving; battery 4 independent refrigeration control mode at a first preset temperature during vehicle charging; battery 4 and passenger compartment bidirectional refrigeration control mode during vehicle charging; battery 4 independent control mode at a second preset temperature during vehicle charging.

[0075] Specifically, during vehicle operation, the independent cooling control mode for the passenger compartment is as follows: the controller controls the first expansion valve 8 to open and the second expansion valve 9 to close; the compressor, condenser and evaporator work, so that the refrigerant flows sequentially through the compressor, condenser, first expansion valve 8, evaporator and compressor, thereby achieving cooling for the passengers.

[0076] During vehicle operation, the bidirectional cooling control mode of battery 4 and passenger compartment is as follows: the controller controls both the first expansion valve 8 and the second expansion valve 9 to open, and the compressor, condenser, cooler, evaporator and water pump 5 to work, so that the refrigerant flows in two paths. The first path flows sequentially through the compressor, condenser, second expansion valve 9, second heat exchange channel 2 of the cooler and compressor. The second path flows sequentially through the compressor, condenser, first expansion valve 8 and compressor, and the coolant flows sequentially through water pump 5, first heat exchange channel 1 of the cooler, water cooling plate and water pump 5. At this time, the second heat exchange channel 2 of the cooler and the first heat exchange channel 1 of the cooler will exchange heat, thereby rapidly cooling the battery 4.

[0077] During vehicle operation, the battery 4's independent cooling control mode is as follows: the controller controls the first expansion valve 8 to close and the second expansion valve 9 to open; the compressor, condenser, cooler, and water pump 5 operate; so that the coolant flows sequentially through the water pump 5, the first heat exchange channel 1 of the cooler, the water-cooled plate, and the water pump 5, and the refrigerant flows sequentially through the compressor, condenser, second expansion valve 9, the second heat exchange channel 2 of the cooler, and the compressor.

[0078] During vehicle charging, the battery 4 operates in an independent cooling control mode at a first preset temperature (the first preset temperature is lower than the second preset temperature described below; the first preset temperature is set between 5°C and 10°C, and the second preset temperature is set between 10°C and 15°C). The controller closes the first expansion valve 8 and the second expansion valve 9. The refrigeration unit and water pump 5 operate, and the coolant flows in two separate paths. The first path of coolant flows sequentially through the water pump 5, the first heat exchange channel 1 of the cooler, the water-cooled plate, and the water pump 5. The second path of coolant flows sequentially through the refrigeration unit, the cooling water inlet pipe 12, the third heat exchange channel 3 of the cooler, the cooling water outlet pipe 11, and the refrigeration unit. At this time, the third heat exchange channel 3 of the cooler exchanges heat with the first heat exchange channel 1 of the cooler, thereby achieving rapid cooling of the battery 4. This utilizes the cold source of the charging pile, eliminating the need for an additional cold source and reducing costs.

[0079] During vehicle charging, the bidirectional cooling control mode of battery 4 and passenger compartment is as follows: the first expansion valve 8 is open and the second expansion valve 9 is closed; the compressor, condenser, evaporator and water pump 5 are working; the refrigerant flows sequentially through the compressor, condenser, first expansion valve 8, evaporator and compressor; the coolant is divided into a first path and a second path. The first path of coolant flows sequentially through water pump 5, the first heat exchange channel 1 of the cooler, water-cooled plate and water pump 5; the second path of coolant flows sequentially through the refrigeration unit, cooling water inlet pipe 12, the third heat exchange channel 3 of the cooler, cooling water outlet pipe 11 and refrigeration unit; at this time, the first expansion valve 8 is open and the second expansion valve 9 is closed, and the compressor, condenser and evaporator are used to cool the passengers. The third heat exchange channel 3 of the cooler in the charging pile exchanges heat with the first heat exchange channel 1 of the cooler, thereby achieving rapid cooling of battery 4.

[0080] During vehicle charging, the battery 4 operates in an independent control mode at the second preset temperature: the first expansion valve 8 is closed, the second expansion valve 9 is open, and the compressor, condenser, cooler, water pump 5, and refrigeration unit are operational; the refrigerant flows sequentially to:

[0081] The coolant flows in two separate channels. The first channel flows sequentially through the water pump 5, the first heat exchange channel 1 of the cooler, the water-cooled plate, and the water pump 5. The second channel flows sequentially through the chiller, the cooling water inlet pipe 12, the third heat exchange channel 3 of the cooler, the cooling water outlet pipe 11, and the chiller. In this case, the first heat exchange channel 1 exchanges heat not only with the second heat exchange channel 2 but also with the third heat exchange channel 3, thus providing a higher cooling source for the battery 4 and enabling the battery 4 to cool down more quickly.

[0082] In summary, this application can select different cooling modes for battery 4 based on different operating conditions and battery 4 temperature, without the need to match a high-performance thermal management system for fast charging conditions. This can reduce costs, decrease vehicle weight, and increase driving range to a certain extent.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A pure electric vehicle and charging pile cooperative thermal management system; for battery refrigeration; characterized in that, The cooling system comprises a passenger cabin refrigeration unit, a battery refrigeration unit and a charging pile cooling unit. The battery refrigeration unit comprises a cooler and a water-cooled plate capable of heat exchange with the battery, the cooler has a plurality of heat exchange channels arranged in parallel, and the water-cooled plate and one of the heat exchange channels form a first refrigeration circuit. Another heat exchange channel of the cooler is connected in parallel with the passenger cabin refrigeration unit, so that the heat exchange channel and the passenger cabin refrigeration unit form a second refrigeration circuit. Still another heat exchange channel of the cooler can be connected in series with the charging pile cooling unit, so that the heat exchange channel and the charging pile cooling unit form a cooling circuit. The first refrigeration circuit can exchange heat with the second refrigeration circuit and the cooling circuit respectively, so that the battery reaches a preset temperature under a preset working condition. The cooler has three heat exchange channels arranged in parallel, namely a first heat exchange channel, a second heat exchange channel and a third heat exchange channel. The water-cooled plate has a cooling pipeline arranged in a zigzag shape inside, and the cooling pipeline can exchange heat with the battery. The inlet and outlet of the cooling pipeline are respectively connected in correspondence with the inlet and outlet of the first heat exchange channel, so that the cooling pipeline and the first heat exchange channel form the first refrigeration circuit. The passenger cabin refrigeration unit comprises a compressor, a condenser and an evaporator. The compressor, the condenser and the evaporator are connected in series to form a passenger cabin refrigeration circuit. The condenser has two refrigerant outlets. One end of the second heat exchange channel is connected to the compressor and the other end is connected to the other refrigerant outlet through a second pipeline, so that the second heat exchange channel is connected in parallel with the passenger cabin refrigeration unit.

2. The heat management system of pure electric vehicle and charging pile according to claim 1; characterized in that, A water pump is arranged between the inlet of the cooling pipeline and the inlet of the first heat exchange channel to circulate the coolant in the first refrigeration circuit.

3. The heat management system of pure electric vehicle and charging pile according to claim 2; characterized in that, A first expansion valve is arranged on the first pipeline, and a second expansion valve is arranged on the second pipeline.

4. The heat management system of pure electric vehicle and charging pile according to claim 3; characterized in that, The charging pile cooling unit comprises a refrigeration machine. One end of the third heat exchange channel is connected to the inlet of the refrigeration machine through a cooling outlet pipe, and the other end is connected to the outlet of the refrigeration machine through a cooling inlet pipe.

5. The heat management system of pure electric vehicle and charging pile according to claim 4; characterized in that, The charging pile cooling unit further comprises a charging power supply. The charging power supply can be connected to the battery through a high-voltage wire harness.

6. The heat management system of pure electric vehicle and charging pile according to claim 4; characterized in that, The heat management system of the pure electric vehicle and the charging pile further comprises a controller. The controller is electrically connected to the first expansion valve and the second expansion valve, and the controller can control the opening or closing of the first expansion valve and the second expansion valve to control the opening or closing of the passenger cabin refrigeration unit and the opening or closing of the second heat exchange channel.

7. The heat management system of pure electric vehicle and charging pile according to claim 6; characterized in that, The pure electric vehicle and charging pile cooperative thermal management system comprises the following control modes: a passenger cabin independent refrigeration control mode during vehicle driving; a battery and passenger cabin two-way refrigeration control mode during vehicle driving; a battery independent refrigeration control mode during vehicle driving; a battery independent refrigeration control mode at a first preset temperature during vehicle charging; a battery and passenger cabin two-way refrigeration control mode during vehicle charging; and a battery independent control mode at a second preset temperature during vehicle charging.

8. The pure electric vehicle and charging pile cooperative thermal management system according to claim 7, characterized in that: the passenger cabin independent refrigeration control mode during vehicle driving is that the controller controls the first expansion valve to be opened and the second expansion valve to be closed, and the compressor, the condenser and the evaporator work, so that the refrigerant flows in the compressor, the condenser, the first expansion valve, the evaporator and the compressor in sequence; the battery and passenger cabin two-way refrigeration control mode during vehicle driving is that the controller controls the first expansion valve and the second expansion valve to be opened, and the compressor, the condenser, the cooler, the evaporator and the water pump work, so that the refrigerant flows in two paths, the first path being the compressor, the condenser, the second expansion valve, the second heat exchange channel of the cooler and the compressor in sequence, and the second path being the compressor, the condenser, the first expansion valve and the compressor in sequence, and the cooling liquid flows in the water pump, the first heat exchange channel of the cooler, the water-cooled plate and the water pump in sequence; the battery independent refrigeration control mode during vehicle driving is that the controller controls the first expansion valve to be closed and the second expansion valve to be opened, and the compressor, the condenser, the cooler and the water pump work, so that the cooling liquid flows in the water pump, the first heat exchange channel of the cooler, the water-cooled plate and the water pump in sequence, and the refrigerant flows in the compressor, the condenser, the second expansion valve, the second heat exchange channel of the cooler and the compressor in sequence; the battery independent refrigeration control mode at the first preset temperature during vehicle charging is that the controller controls the first expansion valve to be closed and the second expansion valve to be closed, and the refrigeration machine and the water pump work, and the cooling liquid flows in two paths, the first path being the water pump, the first heat exchange channel of the cooler, the water-cooled plate and the water pump in sequence, and the second path being the refrigeration machine, the cooling water inlet pipe, the third heat exchange channel of the cooler, the cooling water outlet pipe and the refrigeration machine in sequence; In the vehicle charging process, the bidirectional refrigeration control mode of the battery and the passenger cabin is that the first expansion valve is opened, the second expansion valve is closed, the compressor, the condenser, the evaporator and the water pump work, the refrigerant flows in the compressor, the condenser, the first expansion valve, the evaporator and the compressor in sequence, the cooling liquid is divided into first and second paths, the first path cooling liquid flows in the water pump, the first heat exchange channel of the cooler, the water-cooled plate and the water pump in sequence, and the second path cooling liquid flows in the refrigerator, the cooling water inlet pipe, the third heat exchange channel of the cooler, the cooling water outlet pipe and the refrigerator in sequence. In the vehicle charging process, the independent control mode of the battery at the second preset temperature is that the first expansion valve is closed, the second expansion valve is opened, and the compressor, the condenser, the cooler, the water pump and the refrigerator work. The refrigerant flows in the compressor, the condenser, the second expansion valve, the second heat exchange channel of the cooler and the compressor in sequence, the cooling liquid is divided into first and second paths, the first path cooling liquid flows in the water pump, the first heat exchange channel of the cooler, the water-cooled plate and the water pump in sequence, and the second path cooling liquid flows in the refrigerator, the cooling water inlet pipe, the third heat exchange channel of the cooler, the cooling water outlet pipe and the refrigerator in sequence.

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