Thermal management system and energy storage system
By designing a thermal management system that uses three types of media for heat exchange, the problems of complex structure and large space occupancy in the prior art are solved, and efficient temperature control of the energy storage system is achieved.
Patent Information
- Application Number
- CN202510214719.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2025-05-27
AI Technical Summary
The existing thermal management system has a complex structure and takes up a large space, making it difficult to effectively control the temperature of the energy storage system.
A heat management system is designed to control the temperature of the battery module and the power conversion system through the first and second heat exchange devices and drivers, and heat exchange using three media.
It improves the energy efficiency of the thermal management system, reduces space occupation, and effectively controls the temperature of the energy storage system.
Smart Images
Figure CN120049053A_ABST
Abstract
Description
Technical Field
[0001] Embodiments of the present application relate to the technical field of energy storage systems, and particularly to a thermal management system and an energy storage system. Background Art
[0002] As an auxiliary power supply device for an energy storage system, a thermal management system can control the heat of the energy storage system, thereby improving the energy conversion efficiency of the energy storage system. However, the current thermal management system has a complex structure and requires more space. Summary of the Invention
[0003] Embodiments of the present application aim to provide a thermal management system and an energy storage system to solve the technical problems of the complex structure and large space occupation of the thermal management system in the prior art.
[0004] To solve the above technical problems, embodiments of the present application disclose the following technical solutions:
[0005] In a first aspect, a thermal management system is provided, which is applied to an energy storage system. The energy storage system includes a battery module, and the battery module is disposed in a first medium. The thermal management system includes:
[0006] A first heat exchange device, which connects a first circulation pipeline and a third circulation pipeline. A second medium is provided in the first circulation pipeline, and a third medium is provided in the third circulation pipeline. The first heat exchange device is configured to exchange heat of the second medium in the first circulation pipeline to control the temperature of the battery module, and the third circulation pipeline is connected to the battery module;
[0007] A second heat exchange device, which connects a second circulation pipeline and the third circulation pipeline. The second medium is provided in the second circulation pipeline. The second heat exchange device is configured to exchange heat of the second medium in the second circulation pipeline to control the temperature of the power conversion system;
[0008] A first driver, which is configured to adjust the flow direction of the first medium around the first heat exchange device so that the first medium exchanges heat with the first circulation pipeline, the third circulation pipeline, and the battery module respectively;
[0009] A second driver, which is configured to adjust the flow direction of the first medium around the second heat exchange device so that the first medium exchanges heat with the second circulation pipeline and the third circulation pipeline respectively.
[0010] In combination with the first aspect, the first heat exchange device includes a first heat exchange flow channel and a third heat exchange flow channel. The third heat exchange flow channel is attached to the first heat exchange flow channel. The first heat exchange flow channel is connected to a first circulation pipeline, and the third heat exchange flow channel is connected to a third circulation pipeline. The second medium exchanges heat with the third medium in the first heat exchange flow channel and the third heat exchange flow channel.
[0011] In combination with the first aspect, the first heat exchange device further includes a first heater and a first heat conducting fin. The first heater is connected to the first heat conducting fin, and the first heat conducting fin is connected to the first heat exchange flow channel and the third heat exchange flow channel. The first heater is configured to heat the second medium in the first heat exchange flow channel and / or the third medium in the third heat exchange flow channel through the first heat conducting fin.
[0012] In combination with the first aspect, the second heat exchange device includes a second heat exchange flow channel and a fourth heat exchange flow channel. The second heat exchange flow channel is attached to the fourth heat exchange flow channel. The second heat exchange flow channel is connected to a second circulation pipeline, and the fourth heat exchange flow channel is connected to the third circulation pipeline. The second medium exchanges heat with the third medium in the second heat exchange flow channel and the fourth heat exchange flow channel.
[0013] In combination with the first aspect, the second heat exchange device further includes a second heater and a second heat conducting fin. The second heater is connected to the second heat conducting fin, and the second heat conducting fin is connected to the second heat exchange flow channel and the fourth heat exchange flow channel. The second heater is configured to heat the second medium in the second heat exchange flow channel and / or the third medium in the fourth heat exchange flow channel through the second heat conducting fin.
[0014] In combination with the first aspect, a first switching valve is further included. The first switching valve has a first port, a second port, a third port, and a fourth port. The first port and the fourth port are respectively connected to the head and tail ports of the second circulation pipeline, and the second port and the third port are respectively connected to the head and tail ports of the first circulation pipeline. The first switching valve is configured to control the on / off between the first circulation pipeline and the second circulation pipeline.
[0015] In combination with the first aspect, a water pump is further included. The water pump is arranged in the second circulation pipeline and is configured to drive the second medium in the second circulation pipeline to flow.
[0016] In combination with the first aspect, a heating device is further included. The heating device is connected to the second circulation pipeline and is configured to heat the second medium in the second circulation pipeline.
[0017] In combination with the first aspect, it further includes a compressor configured to generate the third medium. The compressor is connected to the third circulation pipeline through a second switching valve. The second switching valve has a first interface, a second interface, a third interface, and a fourth interface. The first interface and the third interface are respectively connected to the head and tail interfaces of the compressor, and the second interface and the fourth interface are respectively connected to the head and tail interfaces of the third circulation pipeline. The second switching valve is configured to control the connection state between the compressor and the third circulation pipeline to control the flow direction of the third medium.
[0018] In combination with the first aspect, it further includes a throttling device connected to the third circulation pipeline and located between the first heat exchange device and the second heat exchange device. The throttling device is configured to reduce the pressure and temperature of the third medium.
[0019] In a second aspect, there is provided an energy storage system including a battery module and a power conversion system connected to the battery module. The battery module exchanges heat through the first heat exchange device and the second heat exchange device in the thermal management system according to any one of the first aspects. The power conversion system is connected to the second circulation pipeline in the thermal management system according to any one of the first aspects.
[0020] One of the above technical solutions has the following advantages or beneficial effects:
[0021] An embodiment of the present application provides a thermal management system applied to an energy storage system. The energy storage system includes a battery module disposed in a first medium. The thermal management system includes: a first heat exchange device connected to a first circulation pipeline and a third circulation pipeline. A second medium is provided in the first circulation pipeline, and a third medium is provided in the third circulation pipeline. The first heat exchange device is configured to exchange heat of the second medium in the first circulation pipeline to control the temperature of the battery module. The third circulation pipeline is connected to the battery module; a second heat exchange device connected to a second circulation pipeline and the third circulation pipeline. The second medium is provided in the second circulation pipeline. The second heat exchange device is configured to exchange heat of the second medium in the second circulation pipeline to control the temperature of the power conversion system; a first driver configured to adjust the flow direction of the first medium around the first heat exchange device so that the first medium exchanges heat with the first circulation pipeline, the third circulation pipeline, and the battery module respectively; a second driver configured to adjust the flow direction of the first medium around the second heat exchange device so that the first medium exchanges heat with the second circulation pipeline, the third circulation pipeline, and the battery module respectively. In the present application, the battery module is disposed in the first medium, the second medium is provided in the first heat exchange device, and the third medium is provided in the second heat exchange device, so as to realize temperature control of the battery module and the power conversion system through three media, thereby effectively improving the energy efficiency of the thermal management system. Description of the Drawings
[0022] The following will clearly show the technical solutions and other beneficial effects of the present application by describing the specific embodiments of the present application in detail with reference to the drawings.
[0023] Figure 1 Schematic connection structure diagram of the thermal management system provided by the embodiment of the present application;
[0024] Figure 2 Partial structure schematic diagram of the first heat exchange device provided by the embodiment of the present application;
[0025] Figure 3 Schematic connection structure diagram of the thermal management system provided by some embodiments of the present application;
[0026] Figure 4 Schematic connection structure diagram of the thermal management system provided by another embodiment of the present application;
[0027] Figure 5 Schematic connection structure diagram of the thermal management system provided by yet another embodiment of the present application;
[0028] Figure 6 Schematic connection structure diagram of the thermal management system provided by still another embodiment of the present application.
[0029] The reference numerals are as follows:
[0030] 100 - Compressor, 210 - Second switching valve, 220 - First switching valve, 310 - First driver, 320 - Second driver, 410 - First heat exchange device, 412 - First heat conducting fin, 413 - First heater, 414 - First heat exchange flow channel, 415 - Third heat exchange flow channel, 420 - Second heat exchange device, 500 - Throttling device, 600 - Heating device, 700 - Power conversion system, 800 - Water pump, 900 - Battery module. Detailed implementation manners
[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.
[0032] The following describes the specific implementation manners of the present application through embodiments:
[0033] As Figure 1As shown in the figure, an embodiment of the present application provides a thermal management system, which is applied to an energy storage system. The energy storage system includes a battery module 900, and the battery module 900 is disposed in a first medium. The thermal management system includes: a first heat exchange device 410, the first heat exchange device 410 is connected to a first circulation pipeline and a third circulation pipeline, a second medium is disposed in the first circulation pipeline, and a third medium is disposed in the third circulation pipeline. The first heat exchange device 410 is configured to enable heat exchange between the first circulation pipeline and the third circulation pipeline to control the temperature of the battery module 900, and the third circulation pipeline is connected to the battery module 900; a second heat exchange device 420, the second heat exchange device 420 is connected to a second circulation pipeline and the third circulation pipeline, a second medium is disposed in the second circulation pipeline, and the second heat exchange device 420 is configured to enable heat exchange between the second circulation pipeline and the third circulation pipeline to control the temperature of the power conversion system 700; a first driver 310, the first driver 310 is configured to adjust the flow direction of the first medium around the first heat exchange device 410, so that the first medium exchanges heat with the first circulation pipeline, the third circulation pipeline and the battery module 900 respectively; a second driver 320, the second driver 320 is configured to adjust the flow direction of the first medium around the second heat exchange device 420, so that the first medium exchanges heat with the second circulation pipeline, the third circulation pipeline and the battery module 900 respectively.
[0034] Specifically, as Figure 1 shown in the figure, the first circulation pipeline can be understood as: the pipeline that is only connected to the first heat exchange device 410 when it is not connected to the second circulation pipeline; the second circulation pipeline can be understood as: the pipeline that is only connected to the water pump 800, the second heat exchange device 420, the heating device 600 and the power conversion system 700 when it is not connected to the first circulation pipeline; the third circulation pipeline can be understood as: the pipeline that is connected to the second heat exchange device 420, the throttling device 500 and the first heat exchange device 410. The first medium may include a single gas or a mixed gas, such as air and carbon dioxide, etc.; the second medium and the third medium include liquids, such as any one of freon, propane, isobutane and water; in the embodiment of the present application, the second medium and the third medium may be the same or different. In the embodiment of the present application, the power conversion system (Power Conversion System, abbreviated as PCS in English) is an electric energy conversion device. For example, in a photovoltaic system, the PCS can convert direct current into alternating current.
[0035] In the embodiments of the present application, the battery module 900 includes any one of single cells, battery modules, battery packs, and battery clusters; both the first heat exchange device 410 and the second heat exchange device 420 include any one of a shell-and-tube heat exchanger, a plate heat exchanger, a finned-tube heat exchanger, a plate-fin heat exchanger, and a spiral plate heat exchanger; both the first driver 310 and the second driver 320 include any one of a blower, an exhaust fan, a ventilator, a centrifugal fan, and a turbocharger; the first circulation pipeline, the second circulation pipeline, and the third circulation pipeline are all connected to the first heat exchange device 410 and the second heat exchange device 420 by pipelines, thereby forming independent, closed circulation pipelines through which liquid can flow.
[0036] In the embodiments of the present application, the third medium can exchange heat with the battery module 900 through the third circulation pipeline, and then exchange heat with the second medium in the first circulation pipeline through the first heat exchange device 410; when the temperature of the battery module 900 is high and the temperature of the third medium is low, after the third medium exchanges heat with the battery module 900, the temperature of the third medium rises, and the temperature of the battery module 900 drops to achieve cooling, thereby avoiding malfunctions caused by overheating of the battery module 900. The heated third medium then exchanges heat with the cooler second medium, the temperature of the second medium rises, and the temperature of the third medium drops. The cooled third medium then passes through the battery module 900 to cool the battery module 900 again, and so on in a cycle to achieve temperature control when the temperature of the battery module 900 is high; when the temperature of the battery module 900 is low and the temperature of the third medium is high, after the third medium exchanges heat with the battery module 900, the temperature of the third medium drops, and the temperature of the battery module 900 rises, thereby avoiding the inability of the battery module 900 to output electrical energy normally due to too low a temperature. The cooled third medium then exchanges heat with the warmer second medium, the temperature of the second medium drops, and the temperature of the third medium rises, or the cooled third medium exchanges heat with hot air to be heated. The heated third medium then passes through the battery module 900 to heat the battery module 900 again, and so on in a cycle to achieve temperature control when the temperature of the battery module 900 is low.
[0037] It should be noted that the first heat exchange device 410 and the second heat exchange device 420 are also in the first medium. The third medium and the second medium exchange heat with the first medium through the first heat exchange device 410, and the battery module 900 also exchanges heat with the first medium. The first driver 310 drives the first medium around the first heat exchange device 410 to flow toward the battery module 900 side, thereby accelerating the heat exchange efficiency between the third medium and the second medium and the first medium, and at the same time accelerating the heat exchange efficiency between the battery module 900 and the first medium, so that the temperature of the battery module 900 can be kept stable; the second driver 320 drives the first medium around the battery module 900 to flow toward the second heat exchange device 420 side, thereby accelerating the heat exchange efficiency between the first medium and the second medium and the third medium, and at the same time accelerating the flow rate of the first medium around the battery module 900, so that the temperature of the first medium around the second heat exchange device 420 can be kept stable; and the first medium flowing through the second heat exchange device 420 finally flows into the power conversion system 700 to control the heat of the power conversion system 700.
[0038] It can be understood that by setting the first heat exchange device 410, the second heat exchange device 420, the first driver 310 and the second driver 320, the temperature control of the battery module 900 and the power conversion system 700 is realized through three media, thereby effectively improving the energy efficiency of the thermal management system.
[0039] As Figure 1 and Figure 2 shown, in the embodiment of the present application, the first heat exchange device 410 includes a first heat exchange flow channel 414 and a third heat exchange flow channel 415. The third heat exchange flow channel 415 is attached to the first heat exchange flow channel 414. The first heat exchange flow channel 414 is connected to the first circulation pipeline, and the third heat exchange flow channel 415 is connected to the third circulation pipeline. The second medium exchanges heat with the third medium in the third heat exchange flow channel 415 through the first heat exchange flow channel 414. Specifically, when the second medium flows through the first heat exchange flow channel 414, the second medium first exchanges heat with the first heat exchange pipeline. When the third medium flows through the third heat exchange flow channel 415, the third medium first exchanges heat with the third heat exchange flow channel 415. At the same time, the first heat exchange flow channel 414 and the third heat exchange flow channel 415 exchange heat, thereby realizing the heat exchange between the second medium and the third medium. In the embodiment of the present application, both the first heat exchange flow channel 414 and the third heat exchange flow channel 415 can be straight pipes. The straight pipe heat exchange flow channel has a fast flow rate, and the second medium and the third medium stay for a short time. It should be noted that in some other embodiments of the present application, the first heat exchange flow channel 414 and the third heat exchange flow channel 415 can also be spirally attached. The spiral heat exchange pipeline has a large contact area and higher heat exchange efficiency.
[0040] It can be understood that the first heat exchange channel 414 and the third heat exchange channel 415 are designed to be fitted together, making the internal space of the first heat exchange device 410 more compact, increasing the contact area between the second medium and the third medium, and improving the heat exchange efficiency.
[0041] As Figure 1 and Figure 2 shown, in the embodiment of the present application, the first heat exchange device 410 further includes a first heater 413 and a first heat conducting fin 412. The first heater 413 is connected to the first heat conducting fin 412, and the first heat conducting fin 412 connects the first heat exchange channel 414 and the third heat exchange channel 415. The first heater 413 is configured to heat the second medium in the first heat exchange channel 414 and the third medium in the third heat exchange channel 415 through the first heat conducting fin 412. Specifically, after the first heater 413 is powered on, heat is conducted to the first heat exchange channel 414 or the third heat exchange channel 415 through the first heat conducting fin 412, thereby heating the second medium in the first heat exchange channel 414 and the third medium in the third heat exchange channel 415.
[0042] It can be understood that by providing the first heater 413 and the first heat conducting fin 412, the efficient transfer of heat from the first heater 413 to the medium in the channels is promoted. And the heat conducting fin helps to evenly distribute the heat, ensuring that the media in the first heat exchange channel 414 and the third heat exchange channel 415 are evenly heated and reducing local overheating or overcooling.
[0043] In the embodiment of the present application, the second heat exchange device 420 includes a second heat exchange channel and a fourth heat exchange channel. The second heat exchange channel is fitted with the fourth heat exchange channel. The second heat exchange channel is connected to the second circulation pipeline, and the fourth heat exchange channel is connected to the third circulation pipeline. The second medium exchanges heat with the third medium in the fourth heat exchange channel through the second heat exchange channel. Specifically, when the second medium flows through the second heat exchange channel, the second medium first exchanges heat with the second heat exchange pipeline. When the third medium flows through the fourth heat exchange channel, the third medium first exchanges heat with the fourth heat exchange channel. At the same time, the second heat exchange channel exchanges heat with the fourth heat exchange channel, thereby realizing the heat exchange between the second medium and the third medium.
[0044] It can be understood that the second heat exchange channel and the fourth heat exchange channel can be designed to be fitted together, making the internal space of the second heat exchange device 420 more compact, increasing the contact area between the second medium and the third medium, and improving the heat exchange efficiency.
[0045] In the embodiment of the present application, the second heat exchange device 420 further includes a second heater and second heat conducting fins. The second heater is connected to the second heat conducting fins, and the second heat conducting fins are connected to the second heat exchange flow path and the fourth heat exchange flow path. The second heater is configured to heat the second medium in the second heat exchange flow path and the third medium in the fourth heat exchange flow path through the second heat conducting fins. Specifically, after the second heater is powered on, heat is generated, and the heat is guided to the second heat exchange flow path or the fourth heat exchange flow path through the second heat conducting fins, thereby realizing the heating of the second medium in the second heat exchange flow path and the third medium in the fourth heat exchange flow path.
[0046] It can be understood that by providing the second heater and the second heat conducting fins, the efficient transfer of heat from the second heater to the medium in the flow path is promoted. And the heat conducting fins contribute to the uniform distribution of heat, ensuring the uniform heating of the medium in the second heat exchange flow path and the fourth heat exchange flow path, and reducing local overheating or overcooling.
[0047] Such as Figure 3 , Figure 4 , Figure 5 and Figure 6 shown, in the embodiment of the present application, a first switching valve 220 is further included. The first circulation pipeline is connected to the second circulation pipeline through the first switching valve 220. The first switching valve 220 has a first port, a second port, a third port, and a fourth port. The first port and the fourth port are respectively connected to the head and tail ports of the second circulation pipeline, and the second port and the third port are respectively connected to the head and tail ports of the first circulation pipeline. The first switching valve 220 is configured to control the on / off between the first circulation pipeline and the second circulation pipeline. Specifically, when the first port and the fourth port are connected and the second port and the third port are connected, the first circulation pipeline and the second circulation pipeline are disconnected. At this time, the second medium in the first circulation pipeline and the second circulation pipeline circulates in their respective pipelines (as Figure 3 and Figure 5 shown); and when the first port is connected to the second port and the third port is connected to the fourth port, the first circulation pipeline and the second circulation pipeline are connected to form a new circulation pipeline, and the second medium can circulate in the new circulation pipeline (as Figure 4 and Figure 6 shown).
[0048] It can be understood that by controlling the first switching valve 220, different heat management scenarios are achieved under different temperature conditions. In a high-temperature environment, the first circulation pipeline and the second circulation pipeline are not connected. On the battery module 900 side, a low-temperature third medium is used in combination with air cooling for temperature reduction, and on the PCS side, a low-temperature second medium is used for liquid cooling temperature reduction. In a medium-temperature environment, the compressor 100 does not work, and only the water pump 800 supplies the second medium. The first circulation pipeline and the second circulation pipeline are connected. On the battery module 900 side, a low-temperature second medium is used in combination with air cooling for temperature reduction, and on the PCS side, a low-temperature second medium is used for liquid cooling temperature reduction. In a low-temperature environment, the battery module 900 needs to be heated to operate normally. The first circulation pipeline and the second circulation pipeline are not connected. The compressor 100 works to generate a high-temperature and high-pressure third medium. On the battery module 900 side, a high-temperature third medium is used in combination with a fan for temperature increase. On the PCS side, the water pump 800 does not work, and the second driver 320 works to heat the third medium flowing through the second heat exchange device 420 by using heat air convection. In an extremely low-temperature environment, the first circulation pipeline and the second circulation pipeline are connected. The compressor 100 works to generate a high-temperature and high-pressure third medium. On the battery module 900 side, a high-temperature third medium is used in combination with a fan for temperature increase. On the PCS side, the water pump 800 works, and the second medium is heated by the heating device 600 to heat the third medium through the first heat exchange device 410. It can be understood that in the working condition where the ambient temperature is relatively high and the battery module 900 side needs to be heated, there is no need to control the temperature on the PCS side. It should be noted that by switching the connection state of the first circulation pipeline and the second circulation pipeline through the first switching valve 220, the flow direction control of the second medium is achieved. When the first circulation pipeline and the second circulation pipeline are disconnected, the second medium circulates in its respective pipeline, and the second media in the two pipelines do not affect each other, thus realizing the separate control of the second medium in different circulation pipelines. When the first circulation pipeline and the second circulation pipeline are connected, the common control of the second medium is achieved.
[0049] Such as Figure 3 , Figure 4 , Figure 5 and Figure 6As shown in the figure, in the embodiment of the present application, a water pump 800 is further included. The water pump 800 is connected to the second circulation pipeline, and the water pump 800 is configured to drive the second medium in the second circulation pipeline to flow. Specifically, when the first circulation pipeline and the second circulation pipeline are connected through the first switching valve 220, after the water pump 800 is started, it can drive the second medium to flow in the first circulation pipeline and the second circulation pipeline, so that the second medium exchanges heat with the third medium in the first heat exchange device 410 and the second heat exchange device 420 respectively; when the first circulation pipeline and the second circulation pipeline are disconnected through the first switching valve 220, after the water pump 800 is started, it can drive the second medium to flow in the second circulation pipeline, so that the second medium exchanges heat with the third medium in the second heat exchange device 420.
[0050] It can be understood that through the cooperation of the first switching valve 220 and the water pump 800, it is realized to control the second medium to flow in the second circulation pipeline, or, in the first circulation pipeline and the second circulation pipeline, so as to realize different degrees of heat exchange of the third medium, and realize different degrees of temperature control of the battery module 900 and the power conversion system 700.
[0051] As Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown in the figure, in the embodiment of the present application, a heating device 600 is further included. The heating device 600 is connected to the second circulation pipeline, and the heating device 600 is configured to heat the second medium in the second circulation pipeline. Specifically, when the first circulation pipeline and the second circulation pipeline are connected, the heating device 600 heats the second medium and then drives the second medium to flow in the first circulation pipeline and the second circulation pipeline through the water pump 800. The heated second medium exchanges heat with the third medium in the first heat exchange device 410 and the second heat exchange device 420 respectively, so as to increase the temperature of the third medium; when the first circulation pipeline and the second circulation pipeline are disconnected, the heating device 600 heats the second medium and then the second medium flows in the second circulation pipeline. The heated second medium exchanges heat with the third medium in the second heat exchange device 420 to increase the temperature of the third medium.
[0052] Of course, it can be understood that since the function of the heating device 600 is to heat the temperature of the second medium to further heat the temperature of the third medium, therefore, if the heat exchanger (any one of the first heat exchange device 410 and the second heat exchange device 420) adopts the above heat exchanger with heating fins, that is, the heat exchanger can directly heat the second medium and / or the third medium, then the heating device 600 may not need to be further provided. Of course, if a better heating effect is desired, they can also be used in combination.
[0053] It can be understood that through the cooperation of the first switching valve 220, the water pump 800, and the heating device 600, the flow range of the second medium is controlled, and at the same time, the heat exchange degree between the second medium and the third medium can also be controlled, thereby realizing different degrees of temperature control of the battery module 900 and the power conversion system 700.
[0054] As Figure 3 , Figure 4 , Figure 5 and Figure 6 shown, in the embodiment of the present application, the compressor 100 is connected to the third circulation pipeline through the second switching valve 210. The compressor 100 is used to generate the third medium, increase the pressure and temperature of the third medium, and drive the third medium to flow in the third circulation pipeline. The second switching valve 210 has a first interface, a second interface, a third interface, and a fourth interface. The first interface and the third interface are respectively connected to the head and tail interfaces of the compressor 100, and the second interface and the fourth interface are respectively connected to the head and tail interfaces of the third circulation pipeline. The second switching valve 210 is configured to control the connection state between the compressor 100 and the third circulation pipeline to control the flow direction of the third medium. Specifically, when the first interface and the second interface are connected and the third interface and the fourth interface are connected, the head of the third circulation pipeline is connected to the head of the compressor 100, and the tail of the third circulation pipeline is connected to the tail of the compressor 100 (as Figure 3 and Figure 4 shown); and when the first interface is connected to the fourth interface and the second interface is connected to the third interface, the head of the third circulation pipeline is communicated with the tail of the compressor 100, and the tail of the third circulation pipeline is communicated with the head of the compressor 100 (as Figure 5 and Figure 6 shown).
[0055] It can be understood that by setting the compressor 100 and the second switching valve 210, and through their cooperation, the flow direction of the third medium in the third circulation pipeline is controlled, so as to control the sequence of the third medium passing through the first heat exchange device 410 and the second heat exchange device 420, and further control the temperature of the battery module 900 and the power conversion system 700.
[0056] In the embodiment of the present application, the basic function of the compressor 100 is to compress the third medium from a low-pressure state to a high-pressure state. During the process of compressing the third medium, the temperature of the third medium will increase. At the same time, the compressor 100 can also be used as a driving tool to provide power for the third medium. By the cooperation of the compressor 100 and the second switching valve 210, the flow direction of the third medium in the third circulation pipeline can be controlled. When the first interface and the second interface are connected and the third interface and the fourth interface are connected, the third medium flows clockwise in the third circulation pipeline (as Figure 3 and Figure 4The direction indicated by the arrow in the figure is the flow direction of the third medium); the high-temperature and high-pressure third medium exchanges heat with the second medium and the first medium in the second heat exchanger 420 to obtain a low-temperature and high-pressure third medium. It can be understood that the second driver 320 can drive the first medium to simultaneously dissipate heat from the PCS cabin and cool the third medium; it can be understood that when the third medium has this medium flow direction, the battery module 900 cabin needs to be cooled. When the first interface and the fourth interface are connected, and the second interface and the third interface are connected, the third medium flows counterclockwise in the third circulation pipeline (as Figure 5 and Figure 6 the direction indicated by the arrow in the figure is the flow direction of the third medium); the high-temperature and high-pressure third medium exchanges heat with the first medium in the first heat exchanger 410. Specifically, after the third medium heats the first medium near the first heat exchanger 410, the first driver 310 is turned on to drive the air circulation in the cabin, thereby accelerating the increase in the cabin temperature, thereby realizing the temperature increase of the battery module 900, thereby realizing the temperature increase of the battery module 900; it can be understood that when the third medium has this medium flow direction, the battery module 900 cabin needs to be heated.
[0057] It can be understood that by setting the compressor 100 in the thermal management system to change the pressure and temperature of the third medium, and combining with the second switching valve 210, the heated third medium can exchange heat with the second medium or the first medium in the first heat exchanger 410 or the second heat exchanger 420, thereby realizing the temperature control of the battery module 900 and the power conversion system 700.
[0058] such as Figure 3 、 Figure 4 、 Figure 5 and Figure 6 shown, in the embodiment of the present application, a throttling device 500 is further included. The throttling device 500 is connected to the third circulation pipeline and is located between the first heat exchanger 410 and the second heat exchanger 420. The throttling device 500 is configured to reduce the pressure and temperature of the third medium. Specifically, the throttling device 500 includes a throttle valve, a capillary tube, an orifice plate, an expansion valve, etc. The throttling device 500 restricts the flow channel of the third medium, reduces the pressure of the third medium, and thus converts the high-pressure state of the third medium into a low-pressure state, realizing the cooling and pressure reduction of the third medium.
[0059] It can be understood that by setting the throttling device 500 to cool and reduce the pressure of the third medium after heat exchange, the cooling of the battery module 900 or the power conversion system 700 is realized.
[0060] Based on the above solutions provided by the embodiments of the present application, the thermal management system has multiple modes to cope with different working conditions of the battery module 900 and the power conversion system 700.
[0061] As shown Figure 3 in the figure, it is the refrigeration mode of the thermal management system in the embodiment of the present application. This mode is mainly applied to the scenario where the battery module 900 and the power conversion system 700 are overheated (for example: the ambient temperature is greater than or equal to 45 °C). In this mode, the first medium is air, the second medium is coolant (such as water), and the third medium is refrigerant. Among them, the first switching valve 220 is switched so that the first port is communicated with the fourth port, and the second port is communicated with the third port. The second switching valve 210 is switched so that the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface. The compressor 100 is turned on, the first driver 310 and the second driver 320 are turned on, and the water pump 800 is turned on. On the side of the battery module 900, the refrigerant is compressed by the compressor 100 into a high-temperature and high-pressure gaseous state and then enters the second heat exchange device 420. The second driver 320 drives the air to exchange heat with the refrigerant. At the same time, after the water pump 800 is turned on, the low-temperature coolant can also cool the refrigerant through the second heat exchange device 420. After the refrigerant is cooled, it enters the throttling device 500. The throttling device 500 throttles the refrigerant into a low-temperature and low-pressure state and then enters the first heat exchange device 410. The low-temperature refrigerant exchanges heat with the surrounding air to cool the air. The first driver 310 drives the air circulation in the cabin where the battery module 900 is located to cool the battery module 900. After the refrigerant evaporates, it returns to the compressor 100. On the side of the power conversion system 700, the low-temperature coolant is driven by the water pump 800 to flow through the power conversion system 700, and the cabin where the power conversion system 700 is located is cooled by exchanging heat with the power conversion system 700. After the heat exchange, the temperature of the coolant rises and enters the second heat exchange device 420. Since the second driver 320 is turned on, the second driver 320 cools the coolant in the second heat exchange device 420 by driving the air, so as to obtain the low-temperature coolant again. The coolant enters the power conversion system 700 again for heat exchange, so as to realize the cyclic cooling of the power conversion system 700.
[0062] As shown Figure 4As shown, this is the natural heat dissipation mode of the thermal management system in the embodiment of the present application. This mode is mainly applied to the scenario where the temperatures of the battery module 900 and the power conversion system 700 are relatively high (for example: the ambient temperature is greater than or equal to 30°C and less than 45°C). Among them, the first switching valve 220 is switched so that the first port is communicated with the second port, and the third port is communicated with the third port. The second switching valve 210 is switched so that the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface. In this mode, the compressor 100 is not turned on, the first driver 310 and the second driver 320 are turned on, and the water pump 800 is turned on. The water pump 800 pumps the coolant into the second heat exchange device 420. The air is driven by the second driver 320 to cool the coolant. The low-temperature coolant enters the first heat exchange device 410 through the circulation pipeline. The low-temperature coolant exchanges heat with the surrounding air to cool the air. The first driver 310 drives the air circulation in the cabin of the battery module 900 to cool the battery module 900. Since the first circulation pipeline is arranged in the cabin of the battery module 900 and the second circulation pipeline is arranged in the cabin of the power conversion system 700, the low-temperature coolant flowing in the pipeline can also reduce the cabin temperature, thereby realizing the heat dissipation of the power conversion system 700 and the battery module 900.
[0063] As Figure 5 shown, this is the low-temperature mode of the thermal management system in the embodiment of the present application. This mode is mainly applied to the scenario where the ambient temperature is relatively low (for example: the ambient temperature is greater than or equal to -10°C and less than or equal to 10°C). At this time, the battery module 900 may not be able to operate normally due to too low temperature, and the battery module 900 needs to be heated. Among them, the first switching valve 220 is switched so that the first port is communicated with the fourth port, and the second port is communicated with the third port. The second switching valve 210 is switched so that the first interface is communicated with the fourth interface, and the second interface is communicated with the third interface. In this mode, the compressor 100 is turned on, the first driver 310 and the second driver 320 are turned on, and the water pump 800 is not turned on. On the side of the battery module 900, after the compressor 100 compresses the refrigerant, the refrigerant is in a high-temperature and high-pressure state and enters the first heat exchange device 410. The high-temperature refrigerant exchanges heat with the surrounding air to heat the air. The first driver 310 drives the air circulation in the cabin of the battery module 900, thereby heating the battery module 900. After the high-temperature refrigerant enters the throttling device 500, it throttles into a low-temperature and low-pressure state. When the refrigerant flows through the second heat exchange device 420, the second driver 320 drives the air to heat the refrigerant. Finally, the refrigerant flows back to the compressor 100 for another cycle. It can be understood that under this working condition, the temperature control of the power conversion system 700 side is no longer carried out.
[0064] As Figure 6As shown, it is the extremely low temperature mode of the thermal management system in the embodiment of the present application. This mode is mainly applied to scenarios where the ambient temperature is extremely low (for example: the ambient temperature is less than -10°C). Among them, the first switching valve 220 is switched to connect the first port and the second port, and the third port and the fourth port are connected. The second switching valve 210 is switched to connect the first interface and the fourth interface, and the second interface and the third interface are connected. In this mode, the water pump 800 is turned on, the heating device 600 is turned on, the compressor 100 is turned on, and the first driver 310 is turned on, while the second driver 320 is not turned on. On the side of the power conversion system 700, the heating device 600 is used to heat the coolant, and the water pump 800 drives the heated coolant into the second heat exchange device 420 and the first heat exchange device 410. On the side of the battery module 900, after the compressor 100 compresses the refrigerant, the refrigerant is in a high-temperature and high-pressure state and enters the first heat exchange device 410. The high-temperature refrigerant exchanges heat with the surrounding air to raise the temperature of the air. And because the first circulation pipeline is arranged in the cabin of the battery module 900, the high-temperature coolant flowing in the pipeline can also raise the temperature in the cabin, thereby heating the battery module 900. After the high-temperature refrigerant enters the throttling device 500, it throttles into a low-temperature and low-pressure state. When the refrigerant flows through the second heat exchange device 420, due to the too low ambient temperature, the air cannot heat the low-temperature refrigerant. At this time, the high-temperature coolant in the second heat exchange device 420 is used to heat the low-temperature refrigerant by exchanging heat with the high-temperature coolant. Finally, the refrigerant flows back to the compressor 100 for re-circulation. It can be understood that in this working condition, the temperature control of the power conversion system 700 side is no longer carried out. However, because the second circulation pipeline is arranged in the power conversion system 700, the high-temperature coolant flowing in the pipeline can also raise the temperature in the cabin to ensure the normal operation of the power conversion system 700.
[0065] It should be noted that in the embodiment of the present application, in the extremely low temperature mode, in order to improve the heating efficiency, the water pump 800, the heating device 600 and the second driver 320 can be turned off, while the compressor 100 and the first driver 310 are turned on. At the same time, the first heater 413 in the first heat exchange device 410 and / or the second heater in the second heat exchange device 420 are turned on. After the first heater 413 is powered on, heat is conducted to the first heat exchange flow channel 414 and the third heat exchange flow channel 415 through the first heat conducting fins 412, so as to directly heat the refrigerant. Or, the second heater is powered on, and heat is conducted to the second heat exchange flow channel and the fourth heat exchange flow channel through the second heat conducting fins, so as to directly heat the refrigerant. It can be understood that the refrigerant can be directly heated by the first heater 413 and the second heater, and there is no need to turn on the heating device 600, reducing the loss caused by the secondary heat exchange between the coolant and the refrigerant. Of course, in order to further improve the heating efficiency, the water pump 800 and the heating device 600 can also be turned on, and the first heater 413 in the first heat exchange device 410 and / or the second heater in the second heat exchange device 420 can also be turned on.
[0066] The embodiment of the present application also provides an energy storage system, including a battery module 900 and a power conversion system 700 connected to the battery module 900. The battery module 900 exchanges heat through the first heat exchange device 410 and the second heat exchange device 420 in the thermal management system provided in any one of the above embodiments, and the power conversion system 700 is connected to the second circulation pipeline in the thermal management system provided in any one of the above embodiments.
[0067] The above has introduced in detail a thermal management system and an energy storage system provided by the embodiments of the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A thermal management system, applied to an energy storage system, wherein the energy storage system comprises a battery module, wherein the battery module is disposed in a first medium, and wherein: The thermal management system comprises: a first heat exchange device, the first heat exchange device connecting a first circulation pipeline and a third circulation pipeline, a second medium is arranged in the first circulation pipeline, a third medium is arranged in the third circulation pipeline, the first heat exchange device is configured to perform heat exchange with the second medium in the first circulation pipeline to control the temperature of the battery module, and the third circulation pipeline is connected to the battery module; a second heat exchange device, the second heat exchange device connecting the second circulation pipeline and the third circulation pipeline, the second circulation pipeline being provided with the second medium, the second heat exchange device being configured to perform heat exchange with the second medium in the second circulation pipeline to control the temperature of the power conversion system; a first driver, the first driver being configured to adjust a flow direction of the first medium surrounding the first heat exchange device so that the first medium performs heat exchange with the first circulation pipeline, the third circulation pipeline and the battery module respectively; A second driver is configured to adjust a flow direction of the first medium surrounding the second heat exchange device so that the first medium exchanges heat with the second circulation pipeline and the third circulation pipeline respectively.
2. The thermal management system according to claim 1, characterized in that: The first heat exchange device includes a first heat exchange channel and a third heat exchange channel, the third heat exchange channel is in contact with the first heat exchange channel, the first heat exchange channel is connected to a first circulation pipeline, the third heat exchange channel is connected to the third circulation pipeline, and the second medium exchanges heat with the third medium in the third heat exchange channel through the first heat exchange channel.
3. The thermal management system according to claim 2, characterized in that: The first heat exchange device also includes a first heater and a first heat-conducting fin, the first heater is connected to the first heat-conducting fin, the first heat-conducting fin is connected to the first heat exchange channel and the third heat exchange channel, and the first heater is configured to heat the second medium in the first heat exchange channel and / or the third medium in the third heat exchange channel through the first heat-conducting fin.
4. The thermal management system according to claim 1, characterized in that: The second heat exchange device includes a second heat exchange channel and a fourth heat exchange channel, the second heat exchange channel is in contact with the fourth heat exchange channel, the second heat exchange channel is connected to the second circulation pipeline, the fourth heat exchange channel is connected to the third circulation pipeline, and the second medium exchanges heat with the third medium in the fourth heat exchange channel through the second heat exchange channel.
5. The thermal management system according to claim 4, characterized in that: The second heat exchange device also includes a second heater and a second heat-conducting fin, the second heater is connected to the second heat-conducting fin, the second heat-conducting fin is connected to the second heat exchange channel and the fourth heat exchange channel, and the second heater is configured to heat the second medium in the second heat exchange channel and / or the third medium in the fourth heat exchange channel through the second heat-conducting fin.
6. The thermal management system according to claim 1, wherein: It also includes a first switching valve, which has a first port, a second port, a third port and a fourth port, the first port and the fourth port are respectively connected to the head and tail ports of the second circulation pipeline, the second port and the third port are respectively connected to the head and tail ports of the first circulation pipeline, and the first switching valve is configured to control the on-off between the first circulation pipeline and the second circulation pipeline.
7. The thermal management system according to claim 1, characterized in that: The device further includes a water pump, which is disposed in the second circulation pipeline and is configured to drive the second medium in the second circulation pipeline to flow.
8. The thermal management system according to claim 1, wherein: The device further comprises a heating device, which is connected to the second circulation pipeline and is configured to heat the second medium in the second circulation pipeline.
9. The thermal management system according to claim 1, characterized in that: It also includes a compressor, which is used to produce the third medium. The compressor is connected to the third circulation pipeline through a second switching valve. The second switching valve has a first interface, a second interface, a third interface and a fourth interface. The first interface and the third interface are respectively connected to the head and tail interfaces of the compressor, and the second interface and the fourth interface are respectively connected to the head and tail interfaces of the third circulation pipeline. The second switching valve is configured to control the connection state between the compressor and the third circulation pipeline to control the flow direction of the third medium.
10. The thermal management system according to any one of claims 1 to 9, characterized in that: It also includes a throttling device, which is connected to the third circulation pipeline and located between the first heat exchange device and the second heat exchange device, and the throttling device is configured to reduce the pressure and temperature of the third medium.
11. An energy storage system, characterized in that: It includes a battery module and a power conversion system connected to the battery module, the battery module exchanges heat through a first heat exchange device and a second heat exchange device in a thermal management system as described in any one of claims 1-10, and the power conversion system is connected to a second circulation pipeline in the thermal management system as described in any one of claims 1-10.