Battery pack, thermal management system and vehicle

Abstract

The present invention discloses a battery pack, a thermal management system and a vehicle, belonging to the field of vehicle technology. The battery pack comprises: a box body connected to a passenger compartment; an upper cover, which is arranged on the box body and integrated with the floor panel of the passenger compartment, and a thermal management pipeline is arranged in the upper cover. The battery pack, thermal management system and vehicle of the present invention can save energy and increase the driving range.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a battery pack, a thermal management system and a vehicle. Background Art

[0002] When the outside temperature is too low, electric vehicles have to consume energy as energy for air conditioning to heat up the passenger compartment and to keep the battery cells in the battery pack warm. When the outside temperature is too high, electric vehicles have to consume energy as energy for air conditioning to cool down the passenger compartment and to keep the battery cells in the battery pack warm. This wastes the heat of the battery pack, causes a large amount of battery energy loss, and seriously affects the cruising range. Summary of the invention

[0003] The present invention provides a battery pack, a thermal management system and a vehicle, which solve or partially solve the technical problems in the prior art that heat of the battery pack is wasted, energy loss of the battery is large, and the cruising range is seriously affected.

[0004] To solve the above technical problems, the present invention provides a battery pack comprising: a box body connected to a passenger compartment; an upper cover, which is arranged on the box body and integrated with a floor panel of the passenger compartment, and a thermal management pipeline is arranged in the upper cover.

[0005] Furthermore, a plurality of reinforcement members are provided on the upper cover.

[0006] Based on the same inventive concept, the present application also provides a thermal management system, including the battery pack.

[0007] Furthermore, the thermal management system also includes: a condenser; a heater, connected to the condenser; a first pump, connected to the heater; a first electromagnetic three-way valve, a first interface of the first electromagnetic three-way valve is connected to the first pump, and a second interface of the first electromagnetic three-way valve is connected to the thermal management pipeline; a cooler, connected to a third interface of the first electromagnetic three-way valve; an electromagnetic four-way valve, a first interface of the electromagnetic four-way valve is connected to the thermal management pipeline, a second interface of the electromagnetic four-way valve is connected to the condenser, and a third interface of the electromagnetic four-way valve is connected to the cooler; a second pump, connected to a fourth interface of the electromagnetic four-way valve; a cold plate, provided at the bottom of the box and connected to the second pump and the cooler; a second electromagnetic three-way valve, a first interface of the second electromagnetic three-way valve is connected to the cooler, a second interface of the second electromagnetic three-way valve is connected to the first pump, and a third interface of the second electromagnetic three-way valve is connected to the condenser.

[0008] Furthermore, the thermal management system also includes a first three-way valve, a first interface of the first three-way valve is connected to the first pump, a second interface of the first three-way valve is connected to the first interface of the first electromagnetic three-way valve, and a third interface of the first three-way valve is connected to the second interface of the second electromagnetic three-way valve.

[0009] Furthermore, the thermal management system also includes a four-way valve, a first interface of the four-way valve is connected to the third interface of the first three-way valve, a second interface of the four-way valve is connected to the cooler, and the third interface of the four-way valve is connected to the second interface of the second electromagnetic three-way valve.

[0010] Furthermore, the thermal management system also includes a kettle connected to the fourth interface of the four-way valve.

[0011] Furthermore, the thermal management system also includes a second three-way valve, a first interface of the second three-way valve is connected to the third interface of the first electromagnetic three-way valve, a second interface of the second three-way valve is connected to the second interface of the electromagnetic four-way valve, and a third interface of the second three-way valve is connected to the cooler.

[0012] Furthermore, the thermal management system also includes a cooling component connected to the second interface of the electromagnetic four-way valve and the third interface of the second electromagnetic three-way valve.

[0013] Based on the same inventive concept, the present application also provides a vehicle, including the thermal management system.

[0014] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0015] Since the box body is connected to the passenger compartment, the upper cover is arranged on the box body and integrated with the floor panel of the passenger compartment, so the upper cover can not only serve as a structural member for sealing and isolating the battery area, but also play the role of bearing the structural members in the passenger compartment. That is to say, the upper cover directly serves as the floor panel of the passenger compartment, or the floor panel of the passenger compartment directly serves as the upper cover, and there is no need to set up an upper cover or a floor panel of the passenger compartment separately, which can increase the Z-direction space of the passenger compartment, reduce the weight of the whole vehicle, and reduce the cost. Since a thermal management pipeline is arranged in the upper cover, the coolant in the thermal management pipeline exchanges heat with the battery cells in the battery pack, and the coolant in the thermal management pipeline exchanges heat with the passenger compartment, so as to realize simultaneous heating or cooling of the passenger compartment and the battery pack, and there is no need to heat or cool the battery cells in the passenger compartment or the battery pack separately. At the same time, the heat in the battery pack can be exchanged to the passenger compartment to realize cooling of the battery cells in the battery pack and heating of the passenger compartment, and the heat in the battery pack is fully utilized, which can save energy and increase the cruising range. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of the upper cover of the battery pack provided by an embodiment of the present invention;

[0017] Figure 2 for Figure 1 Schematic diagram of the layout of the thermal management pipelines of the middle upper cover;

[0018] Figure 3 A schematic diagram of the structure of a thermal management system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] See also Figure 1-2 A battery pack provided by an embodiment of the present invention includes: a box body and an upper cover 1.

[0020] The box is connected to the passenger compartment.

[0021] The upper cover 1 is disposed on the box body and is integrated with the floor panel of the passenger compartment. A heat management pipeline 2 is disposed in the upper cover 1 .

[0022] The heat management pipeline 2 can be a coil to ensure the heat exchange area and improve the heat exchange efficiency.

[0023] In the specific implementation of the present application, since the box body is connected to the passenger compartment, the upper cover 1 is set on the box body and integrated with the floor panel of the passenger compartment, so the upper cover 1 can not only serve as a structural member for sealing and isolating the battery area, but also play a role in supporting the structural members in the passenger compartment. That is to say, the upper cover 1 directly serves as the floor panel of the passenger compartment, or the floor panel of the passenger compartment directly serves as the upper cover 1. There is no need to set up the upper cover 1 or the floor panel of the passenger compartment separately, which can increase the Z-direction space of the passenger compartment, reduce the weight of the whole vehicle, and reduce the cost. A thermal management pipeline 2 is provided in the upper cover 1, so the coolant in the thermal management pipeline 2 exchanges heat with the battery cells in the battery pack, and the coolant in the thermal management pipeline 2 exchanges heat with the passenger compartment, so as to achieve simultaneous heating or cooling of the passenger compartment and the battery pack, without the need to separately heat up or cool the battery cells in the passenger compartment or the battery pack. At the same time, the heat in the battery pack can be exchanged to the passenger compartment to achieve cooling of the battery cells in the battery pack and heating of the passenger compartment, and the heat in the battery pack is fully utilized, which can save energy and increase the cruising range.

[0024] In some embodiments, in order to ensure the structural strength of the upper cover 1, a plurality of reinforcing members 3 are provided on the upper cover 1 to increase the structural strength of the upper cover 1, so that the upper cover 1 can bear the structural members in the passenger compartment. In this embodiment, a plurality of reinforcing members 3 are welded on the upper cover 1 to ensure the connection strength.

[0025] In this embodiment, a plurality of reinforcing members 3 are arranged in parallel and at intervals on the upper cover 1 to ensure the structural strength of the upper cover 1 and, at the same time, ensure that the force on the upper cover 1 is uniform, thereby increasing the service life of the upper cover 1 .

[0026] In this embodiment, a plurality of reinforcing members 3 are arranged on the upper cover 1 at equal intervals to ensure the structural strength of the upper cover 1 , and at the same time, ensure that the force on the upper cover 1 is uniform, thereby increasing the service life of the upper cover 1 .

[0027] Based on the same inventive concept, the present application also provides a thermal management system, which adopts the battery pack. The specific structure of the battery pack refers to the above-mentioned embodiment. Since all the technical solutions of all the above-mentioned embodiments are adopted, it has at least all the beneficial effects brought by the above-mentioned embodiments, which will not be described one by one here.

[0028] See also Figure 3 The thermal management system also includes: a condenser 4, a heater 5, a first pump 6, a first electromagnetic three-way valve 7, a cooler 8, an electromagnetic four-way valve 9, a second pump 10, a cold plate 11 and a second electromagnetic three-way valve 12.

[0029] The heater 5 is connected to the condenser 4. In this embodiment, the heater 5 can be connected to the condenser 4 through a connecting pipe. The heater 5 can be a PTC (Positive Temperature Coefficient, positive temperature coefficient thermistor), which is easy to arrange, can achieve localized heating, temperature-limited heating, good safety, can automatically perform temperature compensation, adapt to wider voltage fluctuations, is not oxidized, and has a long service life.

[0030] The first pump 6 is communicated with the heater 5. In this embodiment, the first pump 6 may be communicated with the heater 5 through a communication pipeline.

[0031] The first interface of the first electromagnetic three-way valve 7 is connected to the first pump 6. In this embodiment, the first interface of the first electromagnetic three-way valve 7 can be connected to the first pump 6 through a connecting pipeline. The second interface of the first electromagnetic three-way valve 7 is connected to the thermal management pipeline 2. In this embodiment, the second interface of the first electromagnetic three-way valve 7 can be connected to the thermal management pipeline 2 through a connecting pipeline.

[0032] The cooler 8 is in communication with the third interface of the first electromagnetic three-way valve 7. In this embodiment, the cooler 8 may be in communication with the third interface of the first electromagnetic three-way valve 7 through a communication pipeline.

[0033] The first interface of the electromagnetic four-way valve 9 is connected to the thermal management pipeline 2. In this embodiment, the first interface of the electromagnetic four-way valve 9 can be connected to the thermal management pipeline 2 through a connecting pipeline. The second interface of the electromagnetic four-way valve 9 is connected to the condenser 4. In this embodiment, the second interface of the electromagnetic four-way valve 9 can be connected to the condenser 4 through a connecting pipeline. The third interface of the electromagnetic four-way valve 9 is connected to the cooler 8. In this embodiment, the third interface of the electromagnetic four-way valve 9 can be connected to the cooler 8 through a connecting pipeline.

[0034] The second pump 10 is communicated with the fourth interface of the electromagnetic four-way valve 9. In this embodiment, the second pump 10 can be communicated with the fourth interface of the electromagnetic four-way valve 9 through a communication pipeline.

[0035] The cold plate 11 is disposed at the bottom of the box body and is in communication with the second pump 10 and the cooler 8. In this embodiment, the cold plate 11 may be in communication with the second pump 10 and the cooler 8 through a communication pipeline.

[0036] The first interface of the second electromagnetic three-way valve 12 is connected to the cooler 8. In the present embodiment, the first interface of the second electromagnetic three-way valve 12 can be connected to the cooler 8 through a connecting pipe. The second interface of the second electromagnetic three-way valve 12 is connected to the first pump 6. In the present embodiment, the second interface of the second electromagnetic three-way valve 12 can be connected to the first pump 6 through a connecting pipe. The third interface of the second electromagnetic three-way valve 12 is connected to the condenser 4. In the present embodiment, the third interface of the second electromagnetic three-way valve 12 can be connected to the condenser 4 through a connecting pipe.

[0037] In this embodiment, when the outside temperature is too low and rapid heating is required, the first pump 6 and the heater 5 are started, so that the first interface of the electromagnetic four-way valve 9 is connected to the second interface of the electromagnetic four-way valve 9, and the first interface of the first electromagnetic three-way valve 7 is connected to the second interface of the first electromagnetic three-way valve 7. The first pump 6 draws the coolant in the condenser 4 into the heater 5 for heating, and the heated coolant enters the thermal management pipeline 2 through the first interface of the first electromagnetic three-way valve 7 and the second interface of the first electromagnetic three-way valve 7. The battery cells in the battery pack and the passenger compartment are heated simultaneously through the thermal management pipeline 2, and there is no need to heat the battery cells in the passenger compartment or the battery pack separately, which can save energy and improve the cruising range. Then, the coolant returns to the condenser 4 through the first interface of the electromagnetic four-way valve 9 and the second interface of the electromagnetic four-way valve 9.

[0038] In this embodiment, when insulation is required, the first pump 6 and the heater 5 are turned off, the second pump 10 is started, the first interface of the first solenoid three-way valve 7 is closed, the second interface of the first solenoid three-way valve 7 is connected to the third interface of the first solenoid three-way valve 7, the second interface of the solenoid four-way valve 9 is closed, and the fourth interface of the solenoid four-way valve 9 is connected to the first interface of the solenoid four-way valve 9 and the second interface of the solenoid four-way valve 9. The second pump 10 draws the coolant in the cold plate 11 into the cooler 8 through the fourth interface of the electromagnetic four-way valve 9 and the second interface of the electromagnetic four-way valve 9 to cool it down, and then transports it to the cold plate 11 to cool the battery cells in the battery pack. At the same time, the coolant in the cold plate 11 is drawn into the thermal management pipeline 2 through the fourth interface of the electromagnetic four-way valve 9 and the first interface of the electromagnetic four-way valve 9, and exchanges heat with the passenger compartment through the thermal management pipeline 2 to increase the temperature of the passenger compartment and reduce the temperature of the coolant. The heat generated by the battery cells in the battery pack can be fully utilized, energy can be saved, and the cruising range can be increased. Subsequently, the coolant in the thermal management pipeline 2 is transported to the cooler 8 through the second interface of the first electromagnetic three-way valve 7 and the third interface of the first electromagnetic three-way valve 7 in turn, and then transported to the cold plate 11 by the cooler 8 to cool the battery cells in the battery pack.

[0039] In this embodiment, when the outside temperature is too high and the carpet needs to be strongly cooled, the heater 5 is turned off, the third interface of the second electromagnetic three-way valve 12 is turned off, the first interface of the first electromagnetic three-way valve 7 is connected to the second interface of the first electromagnetic three-way valve 7, the first interface of the electromagnetic four-way valve 9 is connected to the second interface of the electromagnetic four-way valve 9, and the first pump 6 is started. The air-conditioning compressor delivers the low-temperature refrigerant to the condenser 4 to exchange heat with the coolant in the condenser 4. The coolant after heat exchange enters the thermal management pipeline 2 through the first interface of the first electromagnetic three-way valve 7 and the second interface of the first electromagnetic three-way valve 7. The battery cells in the battery pack and the passenger compartment are cooled simultaneously through the thermal management pipeline 2, and there is no need to heat up the battery cells in the passenger compartment or the battery pack separately, which can save energy and improve the cruising range. Then, the coolant returns to the condenser 4 through the first interface of the electromagnetic four-way valve 9 and the second interface of the electromagnetic four-way valve 9.

[0040] In this embodiment, the thermal management system also includes a first three-way valve 13, a first interface of the first three-way valve 13 is connected to the first pump 6, a second interface of the first three-way valve 13 is connected to the first interface of the first electromagnetic three-way valve 7, and a third interface of the first three-way valve 13 is connected to the second interface of the second electromagnetic three-way valve 12 to facilitate the circulation of the coolant.

[0041] In this embodiment, the thermal management system also includes a four-way valve 14, a first interface of the four-way valve 14 is connected to the third interface of the first three-way valve 13, a second interface of the four-way valve 14 is connected to the cooler 8, and a third interface of the four-way valve 14 is connected to the second interface of the second electromagnetic three-way valve 12 to facilitate the circulation of the coolant.

[0042] In this embodiment, the thermal management system further includes a kettle 15 connected to the fourth interface of the four-way valve 14. The kettle 5 stores coolant, which can be replenished.

[0043] In this embodiment, the thermal management system also includes a second three-way valve 16, a first interface of the second three-way valve 16 is connected to the third interface of the first electromagnetic three-way valve 7, a second interface of the second three-way valve 16 is connected to the second interface of the electromagnetic four-way valve 9, and a third interface of the second three-way valve 16 is connected to the cooler 8 to facilitate the circulation of the coolant.

[0044] In some embodiments, the thermal management system further includes a cooling component 17 connected to the second interface of the electromagnetic four-way valve 9 and the third interface of the second electromagnetic three-way valve 12 .

[0045] In this embodiment, when the vehicle is running normally and the battery needs to be cooled, the first interface of the first electromagnetic three-way valve 7 is closed, the first interface of the electromagnetic four-way valve 9 and the third interface of the electromagnetic four-way valve 9 are closed, the second interface of the electromagnetic four-way valve 9 and the fourth interface of the electromagnetic four-way valve 9 are connected, the second interface of the second electromagnetic three-way valve 12 is closed, and the first interface of the second electromagnetic three-way valve 12 and the third interface of the second electromagnetic three-way valve 12 are connected. The second pump 10 is started, and the coolant in the cold plate 11 enters the cooler 8, and then enters the cooling component 17 through the first interface of the second electromagnetic three-way valve 12 and the third interface of the second electromagnetic three-way valve 12 for cooling. The cooled coolant enters the cold plate 11 through the second interface of the electromagnetic four-way valve 9 and the fourth interface of the electromagnetic four-way valve 9, so as to cool the battery cells in the battery pack.

[0046] In this embodiment, the cooling component 17 includes a blower 17-1, an evaporator core 17-2 and a warm air core 17-3 which are arranged in sequence, wherein the evaporator core 17-2 and the warm air core 17-3 are in contact with each other, and the warm air core 17-3 is connected to the second interface of the electromagnetic four-way valve 9 and the third interface of the second electromagnetic three-way valve 12. The blower 17-1 blows air to the evaporator core 17-2 to cool the evaporator core 17-2, and the evaporator core 17-2 exchanges heat with the warm air core 17-3 to reduce the temperature of the coolant in the warm air core 17-3.

[0047] In this embodiment, the thermal management system also includes a third three-way valve 18, a first interface of the third three-way valve 18 is connected to the heater core 17-3, a second interface of the third three-way valve 18 is connected to the second interface of the electromagnetic four-way valve 9, and a third interface of the third three-way valve 18 is connected to the condenser 4 to facilitate the circulation of the coolant.

[0048] Based on the same inventive concept, the present application also provides a vehicle, which adopts the thermal management system. The specific structure of the thermal management system refers to the above-mentioned embodiment. Since all the technical solutions of all the above-mentioned embodiments are adopted, it has at least all the beneficial effects brought by the above-mentioned embodiments, which will not be repeated here one by one.

[0049] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0050] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0051] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0053] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0054] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A thermal management system, characterized in that: The invention comprises a battery pack, wherein the battery pack comprises a box body and an upper cover, wherein the box body is connected to a passenger compartment; the upper cover is arranged on the box body and is integrated with a floor panel of the passenger compartment; a thermal management pipeline is arranged in the upper cover, and the thermal management system further comprises: Condenser; a heater, connected to the condenser; a first pump, in communication with the heater; a first electromagnetic three-way valve, wherein a first interface of the first electromagnetic three-way valve is communicated with the first pump, and a second interface of the first electromagnetic three-way valve is communicated with the thermal management pipeline; a cooler, connected to the third interface of the first electromagnetic three-way valve; an electromagnetic four-way valve, wherein a first interface of the electromagnetic four-way valve is in communication with the thermal management pipeline, a second interface of the electromagnetic four-way valve is in communication with the condenser, and a third interface of the electromagnetic four-way valve is in communication with the cooler; a second pump, connected to the fourth interface of the electromagnetic four-way valve; a cold plate, disposed at the bottom of the box body and connected to the second pump and the cooler; A second electromagnetic three-way valve, wherein a first interface of the second electromagnetic three-way valve is connected to the cooler, a second interface of the second electromagnetic three-way valve is connected to the first pump, and a third interface of the second electromagnetic three-way valve is connected to the condenser.

2. The thermal management system according to claim 1, characterized in that: A plurality of reinforcing members are arranged on the upper cover.

3. The thermal management system according to claim 1, characterized in that: The thermal management system also includes a first three-way valve, a first interface of the first three-way valve is connected to the first pump, a second interface of the first three-way valve is connected to the first interface of the first electromagnetic three-way valve, and a third interface of the first three-way valve is connected to the second interface of the second electromagnetic three-way valve.

4. The thermal management system according to claim 3, characterized in that: The thermal management system also includes a four-way valve, a first interface of the four-way valve is connected to the third interface of the first three-way valve, a second interface of the four-way valve is connected to the cooler, and the third interface of the four-way valve is connected to the second interface of the second electromagnetic three-way valve.

5. The thermal management system according to claim 4, characterized in that: The thermal management system further includes a kettle connected to the fourth interface of the four-way valve.

6. The thermal management system according to claim 1, characterized in that: The thermal management system also includes a second three-way valve, a first interface of the second three-way valve is connected to the third interface of the first electromagnetic three-way valve, a second interface of the second three-way valve is connected to the second interface of the electromagnetic four-way valve, and a third interface of the second three-way valve is connected to the cooler.

7. The thermal management system according to claim 1, characterized in that: The thermal management system further includes a temperature reduction component connected to the second interface of the electromagnetic four-way valve and the third interface of the second electromagnetic three-way valve.

8. A vehicle, characterized in that: Comprising a thermal management system as claimed in any one of claims 1 to 7.

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