Thermal management system and energy storage system

Abstract

The invention discloses a heat management system and an energy storage system, and belongs to the technical field of energy storage, the heat management system is applied to the energy storage system, the energy storage system comprises an electric power conversion system, the electric power conversion system is arranged in a first heat exchange medium, and the heat management system comprises a first heat exchange device and a second heat exchange device; the second heat exchange device comprises a third flow channel and a fourth flow channel, the second flow channel and the third flow channel are connected in series to form a first heat exchange pipeline, the first flow channel and the fourth flow channel are connected in series to form a second heat exchange pipeline, and the first heat exchange pipeline and the second heat exchange pipeline are used for adjusting the temperature of the power conversion system; the first electromagnetic expansion valve is used for condensing water vapor in the first heat exchange medium on the outer wall of the first flow channel; and the first driver is used for driving the first heat exchange medium. According to the heat management system, the first electromagnetic expansion valve and the first driver are combined, the dehumidification function of the heat management system under different working conditions is achieved, and it is ensured that the electric power conversion system is in a proper humidity environment.

Description

Technical Field

[0001] Embodiments of the present application relate to the technical field of energy storage, 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, the 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 does not have a dehumidification function, and additional dehumidification equipment is required for dehumidification. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a thermal management system and an energy storage system to solve the technical problem that the thermal management system in the prior art does not have a corresponding dehumidification function under different working conditions.

[0004] To solve the above technical problem, the 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 power conversion system, and the power conversion system is disposed in a first heat exchange medium. The thermal management system includes:

[0006] A first heat exchange device, the first heat exchange device includes a first flow channel and a second flow channel, and the first flow channel is in contact with the second flow channel;

[0007] A second heat exchange device, the second heat exchange device includes a third flow channel and a fourth flow channel, the third flow channel is in contact with the fourth flow channel, the second flow channel is connected in series with the third flow channel through a pipeline to form a first heat exchange pipeline, the first flow channel is connected in series with the fourth flow channel through a pipeline to form a second heat exchange pipeline, a second heat exchange medium is provided in the first heat exchange pipeline, a third heat exchange medium is provided in the second heat exchange pipeline, the first heat exchange pipeline is disposed around the power conversion system, and the first heat exchange pipeline and the second heat exchange pipeline are used to adjust the temperature of the power conversion system;

[0008] A first electromagnetic expansion valve, the first electromagnetic expansion valve is connected to the end of the first flow channel, and the first electromagnetic expansion valve is used to cool the third heat exchange medium. When the low-temperature third heat exchange medium flows through the first flow channel, water vapor in the first heat exchange medium can be condensed on the outer wall of the first flow channel;

[0009] A first driver, the first driver is used to drive the first heat exchange medium to pass through the first flow channel.

[0010] In combination with the first aspect, it further includes a compressor, which is connected in series to the pipeline at the tail of the first flow channel, and the compressor is used to drive the third heat exchange medium and increase the temperature and pressure of the third heat exchange medium.

[0011] In combination with the first aspect, it further includes a second driver, which is used to adjust the flow direction of the first heat exchange medium around the first heat exchange device, so that the first heat exchange medium exchanges heat with the third flow channel, the fourth flow channel and the power conversion system respectively.

[0012] In combination with the first aspect, it further includes a first water pump, which is connected to the pipeline between the second flow channel and the third flow channel, and the first water pump is used to drive the second heat exchange medium to flow.

[0013] In combination with the first aspect, it further includes a dryer filter, which is connected to the pipeline between the first electromagnetic expansion valve and the fourth flow channel, and the dryer filter is used to dehumidify and filter the third heat exchange medium.

[0014] In combination with the first aspect, the energy storage system further includes a battery module, the battery module is arranged in the first heat exchange medium, the thermal management system further includes a third heat exchange device, the third heat exchange device includes a fifth flow channel and a sixth flow channel, the head and tail of the fifth flow channel are connected in series through a pipeline to form a third heat exchange pipeline, the third heat exchange pipeline is arranged around the battery module, the sixth flow channel is connected in series with the first flow channel to form a fourth heat exchange pipeline, and the fifth flow channel and the sixth flow channel are used to adjust the temperature of the battery module through heat exchange.

[0015] In combination with the first aspect, it further includes a second electromagnetic expansion valve, which is connected in series to the fourth heat exchange pipeline and is located between the sixth flow channel and the dryer filter, and the second electromagnetic expansion valve is used to cool down the third heat exchange medium.

[0016] In combination with the first aspect, it further includes a first heating device and a second water pump, the first heating device is connected to the pipeline between the end of the fifth flow channel and the battery module, the first heating device is used to heat the fourth heat exchange medium arranged in the third heat exchange pipeline, the second water pump is connected to the pipeline between the tail of the fifth flow channel and the battery module, and the second water pump is used to drive the fourth heat exchange medium arranged in the third heat exchange pipeline.

[0017] In combination with the first aspect, the energy storage system further includes a battery module, the battery module is disposed in the first heat exchange medium, the thermal management system further includes a first solenoid valve and a second solenoid valve, the first solenoid valve and the second solenoid valve are connected in series through a pipeline to form a fifth heat exchange pipeline, the fifth heat exchange pipeline surrounds the battery module, and the head and tail ends of the fifth heat exchange pipeline are connected to the tail of the first flow channel.

[0018] In combination with the first aspect, it further includes a second heating device, the second heating device is connected in series to the pipeline between the second flow channel and the first water pump, and the second heating device is used to heat the second heat exchange medium.

[0019] In combination with the first aspect, it further includes a third solenoid valve, the third solenoid valve is connected in series to the pipeline between the first flow channel and the compressor, and the third solenoid valve is used to control the connection state between the first heat exchange device and the compressor.

[0020] In a second aspect, an energy storage system is provided, including a battery module and a power conversion system connected to the battery module, the battery module is temperature-regulated through the first heat exchange device, the second heat exchange device or the third heat exchange device in the thermal management system according to any one of the first aspects, and the power conversion system is temperature-regulated 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.

[0021] One of the technical solutions in the above technical solutions has the following advantages or beneficial effects:

[0022] An embodiment of the present application provides a thermal management system applied to an energy storage system. The energy storage system includes a power conversion system disposed in a first heat exchange medium. The thermal management system includes: a first heat exchange device including a first flow channel and a second flow channel in contact with each other; a second heat exchange device including a third flow channel and a fourth flow channel in contact with each other. The second flow channel and the third flow channel are connected in series through a pipeline to form a first heat exchange pipeline, and the first flow channel and the fourth flow channel are connected in series through a pipeline to form a second heat exchange pipeline. A second heat exchange medium is provided in the first heat exchange pipeline, and a third heat exchange medium is provided in the second heat exchange pipeline. The first heat exchange pipeline is disposed around the power conversion system. The first heat exchange pipeline and the second heat exchange pipeline are used to adjust the temperature of the power conversion system; a first electromagnetic expansion valve connected to an end of the first flow channel for cooling the third heat exchange medium. When the low-temperature third heat exchange medium flows through the first flow channel, water vapor in the first heat exchange medium can be condensed on the outer wall of the first flow channel; a first driver for driving the first heat exchange medium to pass through the first flow channel. The thermal management system provided by the present application realizes dehumidification in different ways under different working conditions through the first heat exchange device, the second heat exchange device, the first electromagnetic expansion valve and the first driver, so as to ensure that the power conversion system is in a suitable humidity environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following will clearly show the technical solutions and other beneficial effects of the present application through a detailed description of the specific embodiments of the present application with reference to the drawings.

[0024] Figure 1 is a schematic structural diagram of the thermal management system provided by the embodiment of the present application;

[0025] Figure 2 is a heat exchange schematic diagram of the thermal management system at a high ambient temperature provided by Embodiment 1 of the present application;

[0026] Figure 3 is a heat exchange schematic diagram of the thermal management system at a medium-high ambient temperature provided by Embodiment 1 of the present application;

[0027] Figure 4 is a heat exchange schematic diagram of the thermal management system at a medium-low ambient temperature provided by Embodiment 1 of the present application;

[0028] Figure 5 is a heat exchange schematic diagram of the thermal management system at a low ambient temperature provided by Embodiment 1 of the present application;

[0029] Figure 6 is a heat exchange schematic diagram of the thermal management system at a high ambient temperature provided by Embodiment 2 of the present application;

[0030] Figure 7The heat exchange schematic diagram of the thermal management system at medium and high ambient temperatures provided in Embodiment 2 of the present application;

[0031] Figure 8 The heat exchange schematic diagram of the thermal management system at medium and low ambient temperatures provided in Embodiment 2 of the present application;

[0032] Figure 9 The heat exchange schematic diagram of the thermal management system at low ambient temperatures provided in Embodiment 2 of the present application;

[0033] Figure 10 The structural schematic diagram of the thermal management system provided in Embodiment 3 of the present application.

[0034] The reference numerals are as follows:

[0035] 110 - First heat exchange device, 120 - Second heat exchange device, 130 - Third heat exchange device, 210 - First driver, 220 - Second driver, 310 - First water pump, 320 - Second water pump, 400 - Compressor, 500 - Power conversion system, 600 - Drying filter, 710 - First electromagnetic expansion valve, 720 - Second electromagnetic expansion valve, 730 - First solenoid valve, 740 - Second solenoid valve, 750 - Third solenoid valve, 810 - First heating device, 820 - Second heating device, 900 - Battery module. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with 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 relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and is 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 therefore cannot be understood 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 indicating 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.

[0037] The following describes the specific implementation manners of the present application through embodiments:

[0038] Please refer to Figure 1 , Figure 1The structural schematic diagram of a thermal management system according to an embodiment of the present application is provided. In the embodiment of the present application, the thermal management system is applied to an energy storage system, and the energy storage system includes a power conversion system 500. The power conversion system 500 is disposed in a first heat exchange medium. The thermal management system includes: a first heat exchange device 110, the first heat exchange device 110 includes a first flow channel and a second flow channel, and the first flow channel is in contact with the second flow channel; a second heat exchange device 120, the second heat exchange device 120 includes a third flow channel and a fourth flow channel, the third flow channel is in contact with the fourth flow channel, the second flow channel is connected in series with the third flow channel through a pipeline to form a first heat exchange pipeline, the first flow channel is connected in series with the fourth flow channel through a pipeline to form a second heat exchange pipeline, a second heat exchange medium is disposed in the first heat exchange pipeline, a third heat exchange medium is disposed in the second heat exchange pipeline, the first heat exchange pipeline is disposed around the power conversion system 500, and the first heat exchange pipeline and the second heat exchange pipeline are used to adjust the temperature of the power conversion system 500; a first electromagnetic expansion valve 710, the first electromagnetic expansion valve 710 is connected to the end of the first flow channel, and the first electromagnetic expansion valve 710 is used to cool the third heat exchange medium. When the low-temperature third heat exchange medium flows through the first flow channel, the water vapor in the first heat exchange medium can be condensed on the outer wall of the first flow channel; a first driver 210, the first driver 210 is used to drive the first heat exchange medium to pass through the first flow channel.

[0039] Specifically, as Figure 1 shown, the first heat exchange pipeline can be understood as: a pipeline formed by connecting in series the first flow channel in the first heat exchange device 110, a compressor 400, the fourth flow channel in the second heat exchange device 120, and a drying filter 600; the second heat exchange pipeline can be understood as: a pipeline formed by connecting in series the second flow channel in the first heat exchange device 110, a first water pump 310, and the third flow channel in the second heat exchange device 120. It should be noted that the first heat exchange medium may include a single gas or a mixed gas, such as air and carbon dioxide, etc.; the second heat exchange medium and the third heat exchange medium include liquids, for example, the second heat exchange medium includes any one of freon, propane, isobutane, and water; the third heat exchange medium includes any one of freon, propane, and isobutane; in the embodiment of the present application, the second heat exchange medium and the third heat exchange medium may be the same or different. In the embodiment of the present application, the power conversion system 500 (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.

[0040] In the embodiments of the present application, both the first heat exchange device 110 and the second heat exchange device 120 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 210 and the second driver 220 include any one of a blower, an exhaust fan, a ventilator, a centrifugal fan, and a turbocharger; the first heat exchange pipeline and the second heat exchange pipeline are both connected to the first heat exchange device 110 and the second heat exchange device 120 by pipes, thereby forming independent, closed and liquid-flowable circulation pipelines.

[0041] In the embodiments of the present application, the first flow channel and the second flow channel in the first heat exchange device 110 are arranged in contact and fitting with each other. Among them, the first flow channel and the second flow channel include any one of a straight pipe, a bent pipe, and a spiral pipe; when both the first flow channel and the second flow channel are straight pipes or bent pipes, the outer walls of the first flow channel and the second flow channel are in contact; when the first flow channel is a straight pipe or a bent pipe and the second flow channel is a spiral pipe, the second flow channel is spirally wound around the outer wall of the first flow channel; when both the first flow channel and the second flow channel are spiral pipes, the outer walls of the first flow channel and the second flow channel are wound around each other. It should be understood that the purpose of arranging the first flow channel and the second flow channel in a fitting manner is to increase the contact area between the two flow channels, thereby improving the heat exchange efficiency of the heat exchange medium flowing through the first flow channel and the second flow channel. It is worth noting that the fitting manner of the third flow channel and the fourth flow channel in the second heat exchange device 120 is the same as that of the first flow channel and the second flow channel in the first heat exchange device 110, and the embodiments of the present application will not elaborate more here.

[0042] In the embodiments of the present application, an electromagnetic expansion valve is a device for precisely controlling the refrigerant flow rate. The core of the electromagnetic expansion valve is an electromagnetic coil, which generates a magnetic field after being energized to drive the needle valve to move, change the opening degree to adjust the flow rate, thereby realizing precise control of the liquid supply amount. The first electromagnetic expansion valve 710 in the embodiments of the present application realizes the cooling and pressure reduction of the third heat exchange medium by controlling the flow rate of the third heat exchange medium.

[0043] It can be understood that by setting the first heat exchange device 110 and the second heat exchange device 120 to provide heat exchange for the second heat exchange medium and the third heat exchange medium, the temperature control of the power conversion system 500 is realized; by setting the first electromagnetic expansion valve 710 to cool the third heat exchange medium, the water vapor in the first heat exchange medium is condensed into water droplets, thereby reducing the humidity of the first heat exchange medium; and after the first driver 210 is started, it can drive the first heat exchange medium to evaporate the water droplets, thereby reducing the humidity inside the power conversion system 500.

[0044] Please refer to Figure 1, in the embodiment of the present application, it further includes a compressor 400. The compressor 400 is connected in series to the pipeline at the tail of the first flow channel. The compressor 400 is used to drive the third heat exchange medium and raise the temperature and pressure of the third heat exchange medium. Specifically, the basic function of the compressor 400 is to compress the third heat exchange medium from a low-pressure state to a high-pressure state. During the process of compressing the third heat exchange medium, the temperature of the third heat exchange medium will increase. After the pressure increases, the high-pressure third heat exchange medium flows towards the low-pressure area. Therefore, the compressor 400 can also serve as a driving device to provide power for the third heat exchange medium.

[0045] It can be understood that by arranging the compressor 400 in the third heat exchange pipeline, the pressure of the third heat exchange medium can be increased. After the pressure of the third heat exchange medium is increased, it is cooled and depressurized after passing through the first electromagnetic expansion valve 710, so as to realize the cooling of the second heat exchange medium in the first heat exchange device 110, and at the same time, it also has the effect of reducing the humidity of the first heat exchange medium.

[0046] Please refer to Figure 1 , in the embodiment of the present application, it further includes a second driver 220. The second driver 220 is used to adjust the flow direction of the first heat exchange medium around the first heat exchange device 110, so that the first heat exchange medium exchanges heat with the third flow channel, the fourth flow channel and the power conversion system 500 respectively. Specifically, the second heat exchange medium in the third flow channel exchanges heat with the third heat exchange medium in the fourth flow channel and also exchanges heat with the first heat exchange medium. Similarly, the third heat exchange medium also exchanges heat with the first heat exchange medium. By driving the first heat exchange medium around the third flow channel and the fourth flow channel by the second driver 220, the heat exchange rate between the second heat exchange medium and the third heat exchange medium and the first heat exchange medium can be accelerated, so as to effectively reduce the temperatures of the second heat exchange medium and the third heat exchange medium.

[0047] It can be understood that by arranging the second driver 220, the heat exchange speed between the second heat exchange medium and the third heat exchange medium can be increased, so that the second heat exchange medium can be cooled faster and the cooling speed of the power conversion system 500 can be increased.

[0048] Please refer to Figure 1 , in the embodiment of the present application, it further includes a first water pump 310. The first water pump 310 is connected to the pipeline between the second flow channel and the third flow channel. The first water pump 310 is used to drive the second heat exchange medium to flow.

[0049] Specifically, after the first water pump 310 is started, it can drive the second heat exchange medium to flow in the first heat exchange pipeline; the second heat exchange medium first flows through the second heat exchange device 120 along the first heat exchange pipeline to exchange heat with the third heat exchange medium; then the second heat exchange medium flows through the power conversion system 500 to cool the power conversion system 500; then the second heat exchange medium flows through the first heat exchange device 110 to exchange heat with the cooled third heat exchange medium to achieve cooling; finally, the second heat exchange medium returns to the first water pump 310 to start a new cycle.

[0050] It can be understood that when the power conversion system 500 needs to be cooled, the first water pump 310 can be started, so that the second heat exchange medium in the first heat exchange pipeline can cool the power conversion system 500, thereby preventing the power conversion system 500 from malfunctioning due to excessive temperature.

[0051] Please refer to Figure 1 , in the embodiment of the present application, a dryer filter 600 is further included. The dryer filter 600 is connected to the pipeline between the first electromagnetic expansion valve 710 and the fourth flow channel. The dryer filter 600 is used to dehumidify and filter the third heat exchange medium.

[0052] Specifically, the dryer filter 600 is used to dehumidify and filter the third heat exchange medium, and usually includes molecular sieves, activated alumina, silica gel, etc. Dehumidifying the third heat exchange medium by the dryer filter 600 can remove water vapor in the third heat exchange medium, thereby preventing the water vapor from freezing due to low temperature and blocking when passing through the first electronic expansion valve; filtering the third heat exchange medium can remove impurities in the third heat exchange medium, avoiding the corrosion or oxidation of the second heat exchange pipeline caused by impurities, so that the third heat exchange medium can smoothly pass through the first electromagnetic expansion valve 710 to achieve cooling and pressure reduction.

[0053] It can be understood that by setting the dryer filter 600, water vapor and impurities in the third heat exchange medium can be removed, thereby improving the conversion efficiency of the third heat exchange medium and prolonging the service life of the first electronic expansion valve and the compressor 400.

[0054] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 , Figures 2 to 5The heat exchange schematic diagram of the thermal management system in Embodiment 1 of the present application at different ambient temperatures is provided. In the embodiment of the present application, the energy storage system further includes a battery module 900, the battery module 900 is disposed in the first heat exchange medium, the thermal management system further includes a third heat exchange device 130, the third heat exchange device 130 includes a fifth flow channel and a sixth flow channel, the head and tail of the fifth flow channel are connected in series through a pipeline to form a third heat exchange pipeline, the third heat exchange pipeline is disposed around the battery module 900, the sixth flow channel is connected in series with the first flow channel to form a fourth heat exchange pipeline, and the fifth flow channel and the sixth flow channel are used to adjust the temperature of the battery module 900 through heat exchange.

[0055] Specifically, the battery module 900 includes any one of single cells, battery modules, battery packs, and battery clusters; the third heat exchange device 130 includes 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; a fourth heat exchange medium is disposed in the third heat exchange pipeline, and the fourth heat exchange medium circulates in the third heat exchange pipeline. The fourth heat exchange pipeline is connected in series with the second heat exchange pipeline, so the third heat exchange medium is divided into two paths and flows to the first heat exchange device 110 and the third heat exchange device 130 respectively. The third heat exchange medium flowing to the third heat exchange device 130 exchanges heat with the fourth heat exchange medium in the third heat exchange device 130. After the fourth heat exchange medium exchanges heat with the third heat exchange medium, the temperature of the battery module 900 is adjusted.

[0056] It can be understood that by providing the third heat exchange device 130 and the third heat exchange pipeline, the heat exchange between the fourth heat exchange medium and the third heat exchange medium is realized, so as to facilitate the control of the temperature of the battery module 900.

[0057] Please refer to Figures 2 to 5 In the embodiment of the present application, it further includes a second electromagnetic expansion valve 720, the second electromagnetic expansion valve 720 is connected in series with the fourth heat exchange pipeline and is located between the sixth flow channel and the dryer filter 600, and the second electromagnetic expansion valve 720 is used to cool the third heat exchange medium.

[0058] Specifically, the second electromagnetic expansion valve 720 is used to cool and depressurize the third heat exchange medium before the third heat exchange medium enters the sixth flow channel; the low-temperature third heat exchange medium can exchange heat with the fourth heat exchange medium in the third heat exchange device 130, so as to cool the battery module 900 and realize the temperature control of the battery module 900.

[0059] It can be understood that by providing the second electromagnetic expansion valve 720 and the third heat exchange device 130, the battery module 900 can be cooled when the temperature of the battery module 900 is relatively high, so as to realize the temperature control of the battery module 900 and improve the working efficiency of the battery module 900.

[0060] Please refer to Figures 2 to 5, in the embodiment of the present application, it further includes a first heating device 810 and a second water pump 320. The first heating device 810 is connected to the pipeline between the end of the fifth flow channel and the battery module 900. The first heating device 810 is used to heat the fourth heat exchange medium arranged in the third heat exchange pipeline. The second water pump 320 is connected to the pipeline between the tail of the fifth flow channel and the battery module 900. The second water pump 320 is used to drive the fourth heat exchange medium arranged in the third heat exchange pipeline.

[0061] Specifically, when the battery module 900 is in a low-temperature environment, in order to enable the battery module 900 to operate at an appropriate temperature, the first heating device 810 is added to the third heat exchange pipeline to heat up the fourth heat exchange medium in the third heat exchange pipeline; the heated fourth heat exchange medium then exchanges heat with the battery module 900, so that the temperature of the battery module 900 rises to a level where it can work normally.

[0062] In the embodiment of the present application, after the second water pump 320 is started, it can drive the heated fourth heat exchange medium to circulate in the third heat exchange pipeline. When the fourth heat exchange medium flows through the battery module 900, it can exchange heat with the battery module 900, thereby realizing the temperature control of the battery module 900.

[0063] It can be understood that by setting the first heating device 810 and the second water pump 320, the temperature rise and driving of the fourth heat exchange medium are realized, thereby realizing the temperature control of the battery module 900.

[0064] Please refer to Figure 2 , Figure 2 is the heat exchange schematic diagram of the thermal management system under high ambient temperature provided by Embodiment 1 of the present application. Under high ambient temperature conditions, both the battery module 900 and the power conversion system 500 may overheat. Therefore, in order to prevent the battery module 900 and the power conversion system 500 from malfunctioning due to overheating, it is necessary to start the liquid cooling and heat dissipation mode of the thermal management system to effectively cool down the battery module 900 and the power conversion system 500. In this mode, the first heat exchange medium is air, the second heat exchange medium is water, the third heat exchange medium is refrigerant, and the fourth heat exchange medium is water. Among them, the compressor 400 is turned on, the first water pump 310 and the second water pump 320 are turned on, the second driver 220 is turned on, and the first electromagnetic expansion valve 710 and the second electromagnetic expansion valve 720 are turned on.

[0065] In the embodiment of the present application, the control method for the liquid cooling heat dissipation mode of the power conversion system 500 is as follows: In the second heat exchange pipeline, after the compressor 400 is started, it drives the third heat exchange medium into the second heat exchange device 120, and the second driver 220 drives the first heat exchange medium to cool the third heat exchange medium in the second heat exchange device 120. The cooled third heat exchange medium passes through the drying filter 600 for drying and filtering to remove water vapor and impurities in the third heat exchange medium; subsequently, the third heat exchange medium flows along the pipeline into the first electromagnetic expansion valve 710, and the first electromagnetic expansion valve 710 throttles the third heat exchange medium to obtain a low-temperature and low-pressure third heat exchange medium; the low-temperature third heat exchange medium flows through the first heat exchange device 110 to cool the second heat exchange medium, and finally the third heat exchange medium returns to the compressor 400 for the next cycle (please refer to the direction indicated by the hollow arrow in Figure 2 for the flow direction of the first heat exchange medium, and please refer to the direction indicated by the solid arrow in Figure 2 for the flow direction of the third heat exchange medium). In the first heat exchange pipeline, the first water pump 310 is started to drive the second heat exchange medium to flow into the second heat exchange device 120. The second driver 220 drives the first heat exchange medium to cool the second heat exchange medium in the second heat exchange device 120, and then the second heat exchange medium flows through the power conversion system 500 and cools the power conversion system 500; the second heat exchange medium after heat exchange flows along the pipeline into the first heat exchange device 110 and exchanges heat with the low-temperature third heat exchange medium in the first heat exchange device 110 to achieve cooling; the cooled second heat exchange medium finally returns to the first water pump 310 for the next cycle (please refer to the direction indicated by the solid dot arrow in Figure 2 for the flow direction of the second heat exchange medium). It should be noted that since the second electromagnetic expansion valve 720 is in the open state, the third heat exchange medium will enter the fourth heat exchange pipeline; the third heat exchange medium flows into the third heat exchange device 130 after being cooled by the second electromagnetic expansion valve 720, and finally the third heat exchange medium converges with the third heat exchange medium in the second heat exchange pipeline and returns to the compressor 400 for the next cycle.

[0066] In the embodiment of the present application, the control method for the liquid cooling heat dissipation mode of the battery module 900 is as follows: After the second water pump 320 is started, it drives the fourth heat exchange medium to flow into the third heat exchange device 130 and exchanges heat with the low-temperature third heat exchange medium in the third heat exchange device 130 to achieve cooling; the low-temperature fourth heat exchange medium flows through the first heating device 810 to cool the battery module 900, and the fourth heat exchange medium after heat exchange finally returns to the second water pump 320 for the next cycle; since the first heating device 810 is not turned on under this working condition, the third heat exchange medium will not be heated (please refer to the direction indicated by the solid square dot arrow in Figure 2 for the flow direction of the fourth heat exchange medium).

[0067] In an embodiment of the present application, if it is detected that the humidity of the first heat exchange medium is too high, the first driver 210 is turned on. Since the temperature of the third heat exchange medium is relatively low, water vapor will condense on the outer wall of the first heat exchange device 110 to obtain water droplets. The first driver 210 can drive the first heat exchange medium to evaporate and discharge the water droplets when passing through the first heat exchange device 110.

[0068] Please refer to Figure 3 , Figure 3 which is a heat exchange schematic diagram of the thermal management system at medium and high ambient temperatures provided in Embodiment 1 of the present application. Under medium and high ambient temperature conditions, the temperatures of the battery module 900 and the power conversion system 500 are higher than the ambient temperature but do not reach overheating. Therefore, in order to prevent the temperatures of the battery module 900 and the power conversion system 500 from continuously rising, the air-cooled heat dissipation mode of the thermal management system can be started to cool the battery module 900, and the liquid-cooled heat dissipation mode is adopted for the power conversion system 500 for cooling. In this mode, the first heat exchange medium is air, the second heat exchange medium is water, and the third heat exchange medium is refrigerant. Among them, the compressor 400 is turned on, the first driver 210 and the second driver 220 are turned on, the first electromagnetic expansion valve 710 is turned on, and the first water pump 310 is turned on.

[0069] In an embodiment of the present application, the control method for the liquid-cooled heat dissipation mode of the power conversion system 500 is as follows: In the second heat exchange pipeline, after the compressor 400 is turned on, it drives the third heat exchange medium into the second heat exchange device 120. The second driver 220 drives the first heat exchange medium to cool the third heat exchange medium in the second heat exchange device 120. The cooled third heat exchange medium passes through the drying filter 600 for drying and filtering to remove water vapor and impurities in the third heat exchange medium; subsequently, the third heat exchange medium flows along the pipeline into the first electromagnetic expansion valve 710, and the first electromagnetic expansion valve 710 throttles the third heat exchange medium to obtain a low-temperature and low-pressure third heat exchange medium; the low-temperature third heat exchange medium flows through the first heat exchange device 110 to cool the second heat exchange medium, and finally the third heat exchange medium returns to the compressor 400 for the next cycle (for the flow direction of the first heat exchange medium, please refer to Figure 3 the direction indicated by the hollow arrow in Figure 3the direction indicated by the solid arrow). In the first heat exchange pipeline, the first water pump 310 is started to drive the second heat exchange medium to flow into the second heat exchange device 120. The second driver 220 drives the first heat exchange medium to cool the second heat exchange medium in the second heat exchange device 120. Subsequently, the second heat exchange medium flows through the power conversion system 500 and cools the power conversion system 500; the second heat exchange medium after heat exchange flows along the pipeline into the first heat exchange device 110 and exchanges heat with the low-temperature third heat exchange medium in the first heat exchange device 110 to achieve cooling; the cooled second heat exchange medium finally returns to the first water pump 310 for the next cycle (please refer to the direction indicated by the solid dot arrow in Figure 3 for the flow direction of the second heat exchange medium).

[0070] In the embodiment of the present application, the control method for the air-cooled heat dissipation mode of the battery module 900 is as follows: by turning on the first driver 210, the first heat exchange medium surrounding the first heat exchange device 110 is blown towards the battery module 900, thereby realizing air-cooled heat dissipation for the battery module 900. The third heat exchange medium is in a low-temperature state after throttling by the first electromagnetic expansion valve 710. When the low-temperature third heat exchange medium flows through the first heat exchange device 110, it can reduce the temperature of the surrounding first heat exchange medium. The low-temperature first heat exchange medium is blown towards the battery module 900, thereby effectively reducing the temperature of the battery module 900.

[0071] In the embodiment of the present application, if it is detected that the humidity of the first heat exchange medium is too high, the first driver 210 is turned on. Since the temperature of the third heat exchange medium is relatively low, water vapor will condense on the outer wall of the first heat exchange device 110. The water droplets generated by condensation can be collected and discharged from the first heat exchange device 110. Of course, the first driver 210 can also be used to drive the first heat exchange medium to evaporate and discharge the water droplets when passing through the first heat exchange device 110.

[0072] Please refer to Figure 4 , Figure 4 , which is a heat exchange schematic diagram of the thermal management system at medium and low ambient temperatures provided in Embodiment 1 of the present application. Under medium and low ambient temperature conditions, the external ambient temperature is relatively low. At this time, the temperatures of the battery module 900 and the power conversion system 500 are higher than the external ambient temperature. Therefore, in order to improve the working efficiency of the battery module 900 and the power conversion system 500, the natural heat dissipation mode of the thermal management system can be started to cool the battery module 900, while the liquid-cooled heat dissipation mode is adopted for the power conversion system 500 for cooling. In this mode, the first heat exchange medium is air, and the second heat exchange medium is water. Among them, the first driver 210 and the second driver 220 are turned on, and the first water pump 310 is turned on.

[0073] In the embodiment of the present application, the control method for the liquid cooling heat dissipation mode of the power conversion system 500 is as follows: The first water pump 310 drives the second heat exchange medium to flow into the second heat exchange device 120. The second driver 220 drives the first heat exchange medium to cool the second heat exchange medium in the second heat exchange device 120. The cooled second heat exchange medium flows through the power conversion system 500 and cools the power conversion system 500. Subsequently, the second heat exchange medium flows into the first heat exchange device 110, and the first driver 210 drives the first heat exchange medium to cool the second heat exchange medium in the first heat exchange device 110. Finally, the second heat exchange medium returns to the first water pump 310 for the next cycle (please refer to the direction indicated by the solid dot arrow in Figure 4 ).

[0074] In the embodiment of the present application, the control method for the natural heat dissipation mode of the battery module 900 is as follows: By turning on the first driver 210, the first heat exchange medium surrounding the first heat exchange device 110 is blown towards the battery module 900, thereby realizing natural heat dissipation of the battery module 900 (please refer to the direction indicated by the hollow arrow in Figure 4 ).

[0075] In the embodiment of the present application, it should be noted that there is no need to dehumidify the system under this ambient temperature.

[0076] Please refer to Figure 5 , Figure 5 which is the heat exchange schematic diagram of the thermal management system provided in Embodiment 1 of the present application under low ambient temperature. Under low ambient temperature conditions, the external ambient temperature is very low. At this time, it is necessary to heat the battery module 900 to make the battery module 900 reach the safe operating temperature. Therefore, in order to improve the working efficiency of the battery module 900, the heating mode of the thermal management system can be started to heat up the battery module 900, and the power conversion system 500 does not need to be heated up, so the power conversion system 500 does not need to be heated. In this mode, the fourth heat exchange medium is water. Among them, the first heating device 810 and the second water pump 320 are turned on.

[0077] In the embodiment of the present application, the control method for heating up the battery module 900 is as follows: The second water pump 320 drives the fourth heat exchange medium to flow through the third heat exchange device 130. The fourth heat exchange medium then passes through the first heating device 810. The first heating device 810 heats up the fourth heat exchange medium. The heated fourth heat exchange medium flows through the battery module 900 to heat up the battery module 900. Finally, the fourth heat exchange medium returns to the first water pump 310 for the next cycle (please refer to the direction indicated by the solid square dot arrow in Figure 5 ).

[0078] In the embodiments of the present application, it should be noted that there is no need to dehumidify the system at this ambient temperature.

[0079] Please refer to Figure 6 , Figure 7 , Figure 8 and Figure 9 , Figures 6 to 9 , which provides a heat exchange schematic diagram of the thermal management system in Embodiment 2 of the present application at different ambient temperatures. In the embodiments of the present application, the energy storage system further includes a battery module 900. The battery module 900 is disposed in the first heat exchange medium. The thermal management system further includes a first solenoid valve 730 and a second solenoid valve 740. The first solenoid valve 730 and the second solenoid valve 740 are connected in series through a pipeline to form a fifth heat exchange pipeline. The fifth heat exchange pipeline surrounds the battery module 900, and the head and tail ends of the fifth heat exchange pipeline are connected to the tail of the first flow channel.

[0080] Specifically, a solenoid valve is a basic automation component that controls the on-off or flow regulation of a fluid through electromagnetic force. The first solenoid valve 730 and the second solenoid valve 740 are connected in series through a pipeline to form a fifth heat exchange pipeline, and the first solenoid valve 730 and the second solenoid valve 740 are respectively located at both ends of the fifth heat exchange pipeline. The middle section of the fifth heat exchange pipeline surrounds the outside of the battery module 900 and is used for heat exchange with the battery module 900. The first solenoid valve 730 and the second solenoid valve 740 are respectively connected to the tail of the first flow channel in the first heat exchange device 110. When both the first solenoid valve 730 and the second solenoid valve 740 are turned on, the third heat exchange medium flows into the fifth heat exchange pipeline after flowing out of the first flow channel. The third heat exchange medium exchanges heat with the battery module 900 in the fifth heat exchange pipeline, thereby realizing temperature control of the battery module 900.

[0081] It can be understood that after the first electromagnetic expansion valve 710 cools down the third heat exchange medium, the low-temperature third heat exchange medium flows through the first flow channel and then enters the fifth heat exchange pipeline to exchange heat with the battery module 900, thereby realizing cooling of the battery module 900.

[0082] Please refer to Figures 6 to 9 , in the embodiments of the present application, it further includes a second heating device 820. The second heating device 820 is connected in series to the pipeline between the second flow channel and the first water pump 310. The second heating device 820 is used to heat the second heat exchange medium.

[0083] Specifically, when the external temperature is relatively low, the second heat exchange medium in the first heat exchange pipeline is heated by the second heating device 820, and the heated second heat exchange medium is driven by the first water pump 310 into the second flow channel of the first heat exchange device 110. When the second heat exchange medium flows through the second heat exchange device 120, it heats the first heat exchange medium surrounding the second heat exchange device 120. Finally, the heated first heat exchange medium is driven by the first driver 210 to the battery module 900, thereby realizing the temperature increase of the battery module 900.

[0084] It can be understood that by setting the second heating device 820 and the cooperation of the first water pump 310, the first heat exchange device 110 and the first driver 210, the temperature of the battery module 900 can be increased in a low-temperature environment.

[0085] Please refer to Figure 10 , Figure 10 which provides a heat exchange schematic diagram of the thermal management system in Embodiment 3 of the present application. In the embodiment of the present application, a third solenoid valve 750 is further included. The third solenoid valve 750 is connected in series to the pipeline between the first flow channel and the compressor 400, and the third solenoid valve 750 is used to control the connection state between the first heat exchange device 110 and the compressor 400.

[0086] Specifically, when the first solenoid valve 730, the second solenoid valve 740, and the third solenoid valve 750 are all turned on, the second heat exchange medium will be divided into two paths after flowing out of the first flow channel; in the first path, the second heat exchange medium flows through the first solenoid valve 730 to the battery module 900 to control the temperature of the battery module 900, and then the second heat exchange medium flows through the second solenoid valve 740 and returns to the compressor 400; in the second path, the second heat exchange medium flows through the third solenoid valve 750 and returns to the compressor 400. When the first solenoid valve 730 and the second solenoid valve 740 are turned on and the third solenoid valve 750 is turned off, all the second heat exchange medium flows into the first solenoid valve 730 after flowing out of the first flow channel and then returns to the compressor 400 from the second solenoid valve 740. When the first solenoid valve 730 and the second solenoid valve 740 are turned off and the third solenoid valve 750 is turned on, all the second heat exchange medium returns to the compressor 400 after flowing out of the first flow channel.

[0087] It can be understood that by controlling the opening and closing of the first solenoid valve 730, the second solenoid valve 740, and the third solenoid valve 750, the flow direction and flow rate of the second heat exchange medium can be controlled, thereby realizing different degrees of temperature control of the battery module 900.

[0088] Please refer to Figure 6 , Figure 6This is a heat exchange schematic diagram of the thermal management system provided in Embodiment 2 of the present application. Under high ambient temperature conditions, both the battery module 900 and the power conversion system 500 may overheat. Therefore, in order to prevent the battery module 900 and the power conversion system 500 from malfunctioning due to overheating, it is necessary to start the liquid cooling mode of the thermal management system to cool down the power conversion system 500, while the direct cooling method is used for the battery module 900. In this mode, the first heat exchange medium is air, the second heat exchange medium is water, and the third heat exchange medium is refrigerant. Among them, the compressor 400 is turned on, the first water pump 310 is turned on, the second driver 220 is turned on, the first electromagnetic expansion valve 710 is turned on, and both the first solenoid valve 730 and the second solenoid valve 740 are turned on.

[0089] In the embodiment of the present application, the control method for the direct cooling method of the battery module 900 is as follows: The compressor 400 drives the third heat exchange medium into the second heat exchange device 120, and the second driver 220 drives the first heat exchange medium to cool the third heat exchange medium in the second heat exchange device 120. The cooled third heat exchange medium passes through the dryer filter 600 for drying and filtering to remove water vapor and impurities in the third heat exchange medium; then the third heat exchange medium flows along the pipeline into the first electromagnetic expansion valve 710, and the first electromagnetic expansion valve 710 throttles the third heat exchange medium to obtain a low-temperature and low-pressure third heat exchange medium; the low-temperature third heat exchange medium flows through the first heat exchange device 110 to cool the second heat exchange medium; then the heat-exchanged third heat exchange medium flows through the opened first solenoid valve 730 through the battery module 900 and cools the battery module 900. Finally, the third heat exchange medium returns to the compressor 400 through the opened second solenoid valve 740 for the next cycle (please refer to the direction indicated by the hollow arrow for the flow direction of the first heat exchange medium, and please refer to the direction indicated by the solid arrow for the flow direction of the third heat exchange medium). Figure 6 in Figure 6 for the indication direction of the solid arrow).

[0090] In the embodiment of the present application, the control method for the liquid cooling method of the power conversion system 500 is as follows: The first water pump 310 drives the second heat exchange medium to flow into the second heat exchange device 120. The second driver 220 drives the first heat exchange medium to cool the second heat exchange medium in the second heat exchange device 120. Then the second heat exchange medium flows through the power conversion system 500 and cools the power conversion system 500; the heat-exchanged second heat exchange medium flows along the pipeline into the first heat exchange device 110 and exchanges heat with the low-temperature third heat exchange medium in the first heat exchange device 110 and cools down; the cooled second heat exchange medium finally returns to the first water pump 310 for the next cycle (please refer to the flow direction of the second heat exchange medium Figure 6(the direction indicated by the solid dot arrow in). It should be noted that since the first electromagnetic expansion valve 710 is opened, the second heat exchange medium will exchange heat with the cooled third heat exchange medium in the first heat exchange device 110, thereby achieving cooling.

[0091] In the embodiment of the present application, if it is detected that the humidity of the first heat exchange medium is too high, the first driver 210 can be turned on. Since the temperature of the third heat exchange medium is relatively low, water vapor will condense on the outer wall of the first heat exchange device 110 to obtain water droplets. The first driver 210 can drive the first heat exchange medium to evaporate and discharge the water droplets when passing through the first heat exchange device 110.

[0092] Please refer to Figure 7 , Figure 7 FIG. is a heat exchange schematic diagram of the heat management system at medium and high ambient temperatures provided by Embodiment 2 of the present application. Under medium and high ambient temperature conditions, the temperatures of the battery module 900 and the power conversion system 500 are higher than the ambient temperature but do not reach overheating. Therefore, in order to prevent the temperatures of the battery module 900 and the power conversion system 500 from continuing to rise, the air-cooled heat dissipation mode of the heat management system can be started to cool the battery module 900, and the liquid-cooled heat dissipation mode is adopted for the power conversion system 500 for cooling. In this mode, the first heat exchange medium is air, the second heat exchange medium is water, and the third heat exchange medium is refrigerant. Among them, the compressor 400 is turned on, the first driver 210 and the second driver 220 are turned on, the first electromagnetic expansion valve 710 is turned on, and the first water pump 310 is turned on.

[0093] In the embodiment of the present application, the control method for the liquid-cooled heat dissipation of the power conversion system 500 is as follows: The compressor 400 drives the third heat exchange medium into the second heat exchange device 120, and the second driver 220 drives the first heat exchange medium to cool the third heat exchange medium in the second heat exchange device 120. The cooled third heat exchange medium passes through the dryer filter 600 for drying and filtering to remove water vapor and impurities in the third heat exchange medium; then the third heat exchange medium flows along the pipeline into the first electromagnetic expansion valve 710, and the first electromagnetic expansion valve 710 throttles the third heat exchange medium to obtain a low-temperature and low-pressure third heat exchange medium; the low-temperature third heat exchange medium flows through the first heat exchange device 110 to cool the second heat exchange medium, and finally the third heat exchange medium returns to the compressor 400 for the next cycle (for the flow direction of the first heat exchange medium, please refer to Figure 7 the direction indicated by the hollow arrow in, and for the flow direction of the third heat exchange medium, please refer to Figure 7(indicated by the direction of the solid arrow in). In the first heat exchange pipeline, the first water pump 310 drives the second heat exchange medium to flow into the second heat exchange device 120. The second driver 220 drives the first heat exchange medium to cool the second heat exchange medium in the second heat exchange device 120. Subsequently, the second heat exchange medium flows through the power conversion system 500 and cools the power conversion system 500; the second heat exchange medium after heat exchange flows along the pipeline into the first heat exchange device 110 and exchanges heat with the low-temperature third heat exchange medium in the first heat exchange device 110 to achieve cooling; the cooled second heat exchange medium finally returns to the first water pump 310 for the next cycle (please refer to the direction indicated by the solid dot arrow in Figure 7 ).

[0094] In the embodiment of the present application, the control method for the air-cooled heat dissipation method of the battery module 900 is: the first driver 210 that is turned on blows the first heat exchange medium around the first heat exchange device 110 to the battery module 900, so as to realize air-cooled heat dissipation of the battery module 900. The third heat exchange medium is in a low-temperature state after throttling by the first electromagnetic expansion valve 710. When the low-temperature third heat exchange medium flows through the first heat exchange device 110, it can reduce the temperature of the surrounding first heat exchange medium. Blowing the low-temperature first heat exchange medium to the battery module 900 can effectively reduce the temperature of the battery module 900.

[0095] In the embodiment of the present application, if it is detected that the humidity of the first heat exchange medium is too high, the first driver 210 can be turned on. Since the temperature of the third heat exchange medium is relatively low, water vapor will condense on the outer wall of the first heat exchange device 110 to obtain water droplets. The first driver 210 can drive the first heat exchange medium to evaporate and discharge the water droplets when passing through the first heat exchange device 110.

[0096] Please refer to Figure 8 , Figure 8 , which is a heat exchange schematic diagram of the thermal management system under medium and low ambient temperatures provided by Embodiment 2 of the present application. Under medium and low ambient temperature conditions, the external ambient temperature is relatively low. At this time, the temperatures of the battery module 900 and the power conversion system 500 are higher than the external ambient temperature. Therefore, in order to improve the working efficiency of the battery module 900 and the power conversion system 500, the air-cooled heat dissipation mode of the thermal management system can be started to cool the battery module 900, and the liquid-cooled heat dissipation mode is adopted for the power conversion system 500 for cooling. In this mode, the first heat exchange medium is air and the second heat exchange medium is water. Among them, the first driver 210 and the second driver 220 are turned on, and the first water pump 310 is turned on.

[0097] In the embodiment of the present application, the control method for the liquid cooling heat dissipation mode of the power conversion system 500 is as follows: The first water pump 310 drives the second heat exchange medium to flow into the second heat exchange device 120, and the second driver 220 drives the first heat exchange medium to cool the second heat exchange medium in the second heat exchange device 120. The cooled second heat exchange medium flows through the power conversion system 500 and cools the power conversion system 500; subsequently, the second heat exchange medium flows into the first heat exchange device 110, and the first driver 210 drives the first heat exchange medium to cool the second heat exchange medium in the first heat exchange device 110. Finally, the second heat exchange medium returns to the first water pump 310 for the next cycle (please refer to the direction indicated by the solid dot arrow in Figure 8 for the flow direction of the second heat exchange medium).

[0098] In the embodiment of the present application, the control method for the natural heat dissipation mode of the battery module 900 is as follows: By turning on the first driver 210, the first heat exchange medium surrounding the first heat exchange device 110 is blown towards the battery module 900, thereby realizing natural heat dissipation of the battery module 900 (please refer to the direction indicated by the hollow arrow in Figure 8 for the flow direction of the first heat exchange medium).

[0099] In the embodiment of the present application, it should be noted that there is no need to dehumidify the system under this ambient temperature.

[0100] Please refer to Figure 9 , Figure 9 , which is a heat exchange schematic diagram of the thermal management system at low ambient temperature provided by Embodiment 2 of the present application. Under the low ambient temperature condition, the outside ambient temperature is very low. At this time, it is necessary to heat the battery module 900 to make the battery module 900 reach the safe operating temperature. Therefore, in order to improve the working efficiency of the battery module 900, the heating mode of the thermal management system can be started to heat the battery module 900, and the power conversion system 500 does not need to be heated, so the power conversion system 500 can not be heated. In this mode, the first heat exchange medium is air and the second heat exchange medium is water. Among them, the first driver 210 is turned on, and the first heating device 810 and the second water pump 320 are turned on.

[0101] In the embodiment of the present application, the control method for heating up the battery module 900 is as follows: The first heating device 810 heats up the second heat exchange medium. The heated second heat exchange medium is driven by the first water pump 310 to flow through the second heat exchange device 120, the power conversion system 500, and the first heat exchange device 110. The second heat exchange medium exchanges heat with the first heat exchange medium in the first heat exchange device 110, so as to heat up the first heat exchange medium; the heated first heat exchange medium is blown towards the battery module 900 by the first driver 210, thereby realizing the heating up of the battery module 900; the second heat exchange medium after heat exchange finally returns to the first water pump 310 for the next cycle (for the flow direction of the first heat exchange medium, please refer to Figure 9 the direction indicated by the hollow arrow in Figure 9 , and for the flow direction of the second heat exchange medium, please refer to

[0102] the direction indicated by the solid dot arrow in

[0103] In the embodiment of the present application, it should be noted that there is no need to dehumidify the system at this ambient temperature.

[0104] The embodiment of the present application also provides an energy storage system, including a battery module 900 and a power conversion system 500 connected to the battery module 900. The temperature of the battery module 900 is adjusted through the first heat exchange device 110, the second heat exchange device 120, or the third heat exchange device 130 in the heat management system provided by any one of the above embodiments, and the temperature of the power conversion system 500 is adjusted through the first heat exchange device 110 and the second heat exchange device 120 in the heat management system provided by any one of the above embodiments.

[0105] The above has introduced in detail a heat 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, characterized in that: Applied to an energy storage system, the energy storage system includes a power conversion system, the power conversion system is arranged in a first heat exchange medium, and the thermal management system includes: A first heat exchange device, the first heat exchange device comprising a first flow channel and a second flow channel, the first flow channel is in contact with the second flow channel; a second heat exchange device, the second heat exchange device comprising a third flow channel and a fourth flow channel, the third flow channel is in contact with the fourth flow channel, the second flow channel is connected in series with the third flow channel through a pipeline to form a first heat exchange pipeline, the first flow channel is connected in series with the fourth flow channel through a pipeline to form a second heat exchange pipeline, a second heat exchange medium is arranged in the first heat exchange pipeline, a third heat exchange medium is arranged in the second heat exchange pipeline, the first heat exchange pipeline is arranged around the power conversion system, and the first heat exchange pipeline and the second heat exchange pipeline are used to adjust the temperature of the power conversion system; a first electromagnetic expansion valve, the first electromagnetic expansion valve being connected to an end of the first flow channel, the first electromagnetic expansion valve being used to cool the third heat exchange medium, so that when the low-temperature third heat exchange medium flows through the first flow channel, water vapor in the first heat exchange medium can be condensed on an outer wall of the first flow channel; A first driver is used to drive the first heat exchange medium to pass through the first flow channel.

2. The thermal management system according to claim 1, characterized in that: It also includes a compressor, which is connected in series to the pipeline at the tail end of the first flow channel, and is used to drive the third heat exchange medium and increase the temperature and pressure of the third heat exchange medium.

3. The thermal management system according to claim 1, characterized in that: It also includes a second driver for adjusting the flow direction of the first heat exchange medium surrounding the first heat exchange device so that the first heat exchange medium exchanges heat with the third flow channel, the fourth flow channel and the power conversion system respectively.

4. The thermal management system according to claim 1, characterized in that: It also includes a first water pump, which is connected to a pipeline between the second flow channel and the third flow channel, and is used to drive the second heat exchange medium to flow.

5. The thermal management system according to claim 1, characterized in that: It also includes a drying filter, which is connected to the pipeline between the first electromagnetic expansion valve and the fourth flow channel, and is used to dehumidify and filter the third heat exchange medium.

6. The thermal management system according to claim 5, characterized in that: The energy storage system also includes a battery module, which is arranged in the first heat exchange medium. The thermal management system also includes a third heat exchange device, which includes a fifth flow channel and a sixth flow channel. The head and tail parts of the fifth flow channel are connected in series through a pipeline to form a third heat exchange pipeline. The third heat exchange pipeline is arranged around the battery module. The sixth flow channel is connected in series with the first flow channel to form a fourth heat exchange pipeline. The fifth flow channel and the sixth flow channel are used to adjust the temperature of the battery module through heat exchange.

7. The thermal management system according to claim 6, characterized in that: It also includes a second electromagnetic expansion valve, which is connected in series to the fourth heat exchange pipeline and is located between the sixth flow channel and the drying filter, and the second electromagnetic expansion valve is used to cool the third heat exchange medium.

8. The thermal management system according to claim 7, characterized in that: It also includes a first heating device and a second water pump, the first heating device is connected to the pipe between the end of the fifth flow channel and the battery module, the first heating device is used to heat the fourth heat exchange medium arranged in the third heat exchange pipeline, the second water pump is connected to the pipe between the tail of the fifth flow channel and the battery module, and the second water pump is used to drive the fourth heat exchange medium arranged in the third heat exchange pipeline.

9. The thermal management system according to claim 1, characterized in that: The energy storage system also includes a battery module, which is arranged in the first heat exchange medium. The thermal management system also includes a first solenoid valve and a second solenoid valve, which are connected in series through a pipeline to form a fifth heat exchange pipeline, and the fifth heat exchange pipeline surrounds the battery module. The first and tail ends of the fifth heat exchange pipeline are connected to the tail of the first flow channel.

10. The thermal management system according to claim 4, characterized in that: It also includes a second heating device, which is connected in series to a pipeline between the second flow channel and the first water pump, and is used to heat the second heat exchange medium.

11. The thermal management system according to claim 2, characterized in that: It also includes a third solenoid valve, which is connected in series to a pipeline between the first flow channel and the compressor, and is used to control the connection state between the first heat exchange device and the compressor.

12. An energy storage system, characterized in that: The invention comprises a battery module and an electric power conversion system connected to the battery module, wherein the temperature of the battery module is adjusted by a first heat exchange device, a second heat exchange device or a third heat exchange device in a thermal management system as described in any one of claims 1 to 11, and the temperature of the electric power conversion system is adjusted by a first heat exchange device and a second heat exchange device in a thermal management system as described in any one of claims 1 to 11.

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