Thermal management system, energy storage system and photovoltaic inverter system

Abstract

The invention provides a thermal management system, an energy storage system and a photovoltaic inverter system. The difficulty of installation and maintenance can be reduced. The cooling liquid circulation system comprises a cooling liquid flow channel plate and a plurality of cooling liquid end assemblies, a cooling liquid flow channel is integrated in the cooling liquid flow channel plate, and the cooling liquid flow channel is communicated with the cooling liquid end assemblies. The refrigerant circulation system comprises a refrigerant flow channel plate and a plurality of refrigerant end assemblies, a refrigerant flow channel is integrated in the refrigerant flow channel plate, and the refrigerant flow channel is communicated with the refrigerant end assemblies. The cooling liquid flow channel and the refrigerant channel are communicated with the heat exchange assembly, and the heat exchange assembly is used for heat exchange of the cooling liquid and the refrigerant. And the cooling liquid flow channel plate and the refrigerant flow channel plate are formed into a plate shape. The cooling liquid runner plate and the refrigerant runner plate are fixed in an attached mode. The multiple cooling liquid end assemblies are installed on the face, away from the refrigerant flow channel plate, of the cooling liquid flow channel plate. The multiple refrigerant end assemblies and the heat exchange assembly are installed on the face, away from the cooling liquid flow channel plate, of the refrigerant flow channel plate.

Description

Thermal management systems, energy storage systems, and photovoltaic inverter systems

[0001] This application claims priority to the Chinese patent application with application number 202322385242.4 filed with the State Intellectual Property Office of China on August 30, 2023, and priority to the Chinese patent application with the utility model name “Thermal Management System, Energy Storage System and Photovoltaic Inversion System”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of thermal management technology, and in particular to a thermal management system, an energy storage system, and a photovoltaic inverter system. Background Art

[0003] With the rapid development of new energy technologies, energy storage technology is gaining increasing attention. In addition to battery clusters for storing electrical energy and the electronic devices used to manage them, existing energy storage systems also include thermal management systems to ensure their performance and safety.

[0004] One existing technique involves directly exchanging heat with the thermally managed object through a refrigerant, thereby cooling or heating the object. However, existing refrigerants are typically chemical substances. This makes them susceptible to corrosion, requiring the use of corrosion-resistant materials such as metal in pipes, increasing costs. Furthermore, leaks are difficult to clean and can be harmful to humans and the environment.

[0005] To address this issue, secondary cooling technology has been proposed. This involves exchanging heat between a refrigerant and a coolant, such as water, and then using the resulting coolant to cool or heat the thermally managed object. Because coolant is less corrosive, it requires less demanding piping materials, such as plastic, significantly reducing costs. Furthermore, since the coolant is primarily water, leaks are easier to clean and pose less risk to humans or the environment.

[0006] However, this secondary cooling technology requires the layout of both coolant and refrigerant circuits, resulting in increased thermal management system costs, complex installation, and significant space requirements. This is particularly true in power plants, where thermal management of large numbers of battery clusters is required, as the sheer number of pipes and complex connections make installation and maintenance challenging.

[0007] Utility Model Content

[0008] The present application provides a thermal management system, an energy storage system, and a photovoltaic inverter system that can reduce the difficulty of installation and maintenance.

[0009] In a first aspect, a thermal management system is provided, comprising a coolant circulation system, a refrigerant circulation system and a heat exchange component. The coolant circulation system comprises a coolant flow channel plate and a plurality of coolant end assemblies, wherein the coolant flow channel is integrated in the coolant flow channel, and the coolant flow channel connects the plurality of coolant end assemblies. The refrigerant circulation system comprises a refrigerant flow channel plate and a plurality of refrigerant end assemblies, wherein the refrigerant flow channel is integrated in the refrigerant flow channel, and the refrigerant channel connects the plurality of refrigerant end assemblies. The coolant flow channel and the refrigerant channel are connected to the heat exchange component, and the heat exchange component is used for heat exchange between the coolant and the refrigerant. The coolant flow channel plate and the refrigerant flow channel plate are formed in a plate shape. The coolant flow channel plate is fitted and fixed to the refrigerant flow channel plate. The plurality of coolant end assemblies are mounted on a side of the coolant flow channel plate facing away from the refrigerant flow channel plate (i.e., the configuration surface of the coolant flow channel plate). The plurality of refrigerant end components and the heat exchange component are mounted on a side of the refrigerant flow channel plate facing away from the coolant flow channel plate (ie, the configuration surface of the refrigerant flow channel plate).

[0010] By integrating flow channels for connecting various components of the refrigerant circulation system on the refrigerant flow channel plate and integrating flow channels for connecting various components of the coolant circulation system on the coolant flow channel plate, the difficulty of installation and maintenance can be reduced.

[0011] The coolant end assembly includes one or more of the following components: a coolant tank, a pump, a heater, and a multi-way valve.

[0012] The refrigerant end assembly includes one or more of the following components: a compressor, an expansion valve, a fluorine pump, a liquid storage tank, a four-way valve or a gas-liquid separator.

[0013] The heat exchange assembly includes an evaporator and / or a condenser.

[0014] In one implementation, the multiple coolant end assemblies include a coolant tank and a pump, with the coolant tank positioned above the pump in a first direction. When the coolant flow channel plate is positioned parallel to the direction of gravity, the first direction is parallel to the direction of gravity. This allows coolant to be replenished using gravity, reducing energy consumption.

[0015] Furthermore, the refrigerant flow plate includes mounting components for securing the thermal management system. Because the refrigerant flow plate is made of metal, it can serve as a load-bearing component for the thermal management system, thereby improving the stability and safety of the thermal management system's installation configuration.

[0016] In addition, the case is located on the side of the refrigerant flow channel plate, and the side is parallel to the thickness direction of the refrigerant flow channel plate. This can save space on the configuration plane of the refrigerant flow channel plate for installing refrigerant components, which is conducive to the miniaturization of the thermal management system.

[0017] In one implementation, the heat exchange element is mounted on a surface of the refrigerant flow channel plate that faces away from the coolant flow channel plate. Furthermore, the refrigerant flow channel plate includes at least one through-hole extending through the thickness of the refrigerant flow channel plate. A pipe is housed within the at least one through-hole, the pipe being used to connect the heat exchange element to the flow channel in the coolant flow channel plate.

[0018] For example, there is only one through hole, with a portion of the through hole within the coverage area of ​​the condenser and another portion within the coverage area of ​​the evaporator. Thus, a single through hole can accommodate the pipes connecting the condenser and the evaporator, thereby reducing processing difficulty and improving the strength of the refrigerant channel plate.

[0019] For another example, there are two through holes, one of which is within the coverage of the condenser and the other is within the coverage of the evaporator. Thus, by setting the positions of the through holes according to the positions of the condenser and the evaporator, the flexibility of the layout of the condenser and the evaporator can be improved.

[0020] In a second aspect, an energy storage system is provided, comprising: a battery cluster and a thermal management system, wherein the thermal management system uses a coolant to exchange heat with the battery cluster. The coolant circulation system includes a coolant flow channel plate and multiple coolant end assemblies, wherein the coolant flow channel is integrated into the coolant flow channel, and the coolant flow channel connects the multiple coolant end assemblies. The refrigerant circulation system includes a refrigerant flow channel plate and multiple refrigerant end assemblies, wherein the refrigerant flow channel is integrated into the refrigerant flow channel, and the refrigerant channel connects the multiple refrigerant end assemblies. The coolant flow channel and the refrigerant channel connect to a heat exchange assembly, and the heat exchange component is used for heat exchange between the coolant and the refrigerant. The coolant flow channel plate and the refrigerant flow channel plate are formed in a plate shape. The coolant flow channel plate is bonded and fixed to the refrigerant flow channel plate. The multiple coolant end assemblies are mounted on a side of the coolant flow channel plate facing away from the refrigerant flow channel plate. The multiple refrigerant end assemblies and the heat exchange assembly are mounted on a side of the refrigerant flow channel plate facing away from the coolant flow channel plate.

[0021] In a third aspect, a photovoltaic inverter system is provided, characterized by comprising: a photovoltaic panel, a photovoltaic inverter, an energy storage system, and a thermal management system. The photovoltaic panel is used to convert solar energy into electrical energy. The energy storage system includes a battery cluster for storing electrical energy from the photovoltaic panel. The photovoltaic inverter is used to convert direct current (DC) from the photovoltaic panel into alternating current (AC). The thermal management system uses a coolant to exchange heat with the energy storage system and / or the photovoltaic inverter. The coolant circulation system includes a coolant flow plate and multiple coolant end assemblies. The coolant flow plate has integrated coolant flow channels, which connect the multiple coolant end assemblies. The refrigerant circulation system includes a refrigerant flow plate and multiple refrigerant end assemblies. The refrigerant flow plate has integrated refrigerant flow channels, which connect the multiple refrigerant end assemblies. The coolant flow channels and the refrigerant channels connect to a heat exchange assembly, which is used for heat exchange between the coolant and the refrigerant. The coolant flow plate and the refrigerant flow plate are formed in a plate shape. The coolant flow channel plate is fixedly attached to the refrigerant flow channel plate. The plurality of coolant end assemblies are mounted on a side of the coolant flow channel plate facing away from the refrigerant flow channel plate. The plurality of refrigerant end assemblies and the heat exchange assembly are mounted on a side of the refrigerant flow channel plate facing away from the coolant flow channel plate.

[0022] The configuration and structure of the components in the thermal management system in the second and third aspects are similar to those in the first aspect, and their detailed descriptions are omitted here to avoid redundancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic structural diagram of an example of a photovoltaic inverter system to which the thermal management system provided by the present application is applicable.

[0024] FIG2 is a schematic structural diagram of an example of an energy storage system to which the thermal management system provided by the present application is applicable.

[0025] FIG3 is a structural diagram of an example of a thermal management system provided by the present application.

[0026] FIG4 is an architectural diagram of another example of the thermal management system provided by the present application.

[0027] FIG5 is an architectural diagram of another example of the thermal management system provided by the present application.

[0028] FIG6 is an architectural diagram of another example of the thermal management system provided by the present application.

[0029] FIG7 is an architectural diagram of another example of the thermal management system provided by the present application.

[0030] FIG8 is an architectural diagram of another example of the thermal management system provided by the present application.

[0031] FIG9 is a structural diagram showing an example of the layout of the refrigerant flow channel plate in the thermal management system provided by the present application.

[0032] FIG10 is a structural diagram showing another example of the layout of the refrigerant flow channel plate in the thermal management system provided by the present application.

[0033] FIG11 is a structural diagram showing another example of the layout of the refrigerant flow channel plate in the thermal management system provided by the present application.

[0034] FIG12 is a structural diagram showing another example of the layout of the refrigerant flow channel plate in the thermal management system provided by the present application.

[0035] FIG13 is a structural diagram showing an example of the layout of a coolant flow channel plate in the thermal management system provided by the present application.

[0036] FIG14 is a structural diagram showing another example of the layout of the coolant channel plate in the thermal management system provided by the present application.

[0037] FIG15 is a structural diagram showing another example of the layout of the coolant channel plate in the thermal management system provided by the present application.

[0038] FIG. 16 is a schematic diagram showing an example of the arrangement relationship between the coolant flow channel plate and the refrigerant flow channel plate. DETAILED DESCRIPTION

[0039] The technical solution in this application will be described below with reference to the accompanying drawings.

[0040] The thermal management system provided in this application is applicable to energy storage systems or photovoltaic inverter systems, and is particularly applicable to scenarios with large-scale battery clusters as thermal management objects, such as energy storage systems or photovoltaic inverter systems in power stations.

[0041] Figure 1 illustrates an example of a photovoltaic inverter system suitable for use with the thermal management system provided herein. As shown in Figure 1, the photovoltaic inverter system includes photovoltaic (PV) panels and a PV inverter. PV panels convert solar energy into electrical energy. Since PV panels generate direct current (DC), a PV inverter is required to convert DC into AC for easier transmission and utilization.

[0042] The photovoltaic inverter includes a direct current to alternating current (DC / AC) converter, and the DC / AC converter is used to convert direct current into alternating current.

[0043] The photovoltaic inverter also includes a maximum power point tracking (MPPT) module, which is used to track the highest voltage and current values ​​so that the power generation system can output current at maximum power.

[0044] The MPPT module and DC / DC module in the photovoltaic inverter can be arranged in the same package device or in different package devices.

[0045] The MPPT module may include a direct current to direct current (DC / DC) converter, which is used to stabilize the DC power generated by the PV module (or, in other words, perform voltage conversion processing). The DC power after voltage stabilization can be output to the power energy storage system. One end of the DC / AC converter (denoted as end A) is connected to the MPPT module and an energy storage system, and the other end B is used to connect to the AC grid or AC load. Thus, the DC / AC converter converts the DC power output by the MPPT module or the energy storage system into AC power and provides it to the AC load or the AC grid.

[0046] The other end, B, of the DC / AC converter (referred to as "B-end") can also be connected to another energy storage system via an inverter (i.e., a DC / AC converter). This inverter converts the AC power from the PV inverter into DC power and stores it in the energy storage system. Furthermore, the DC power from the energy storage system can be converted into AC power and supplied to an AC load or the AC grid.

[0047] It should be noted that the photovoltaic inverter system provided in the present application may include only the energy storage system connected to the A-end of the DC / AC converter in the photovoltaic inverter, or may include only the energy storage system connected to the B-end of the DC / AC converter in the photovoltaic inverter, or may include both of the above energy storage systems.

[0048] The photovoltaic inverter system may also include a thermal management system that uses a coolant to cool the battery cluster in the energy storage system, the DC / DC converter in the photovoltaic inverter, and some or all of the components in the DC / AC converter. This thermal management system will be described in detail later.

[0049] FIG1 is an example of an energy storage system applicable to the thermal management system provided in this application. As shown in FIG2 , the energy storage system includes one or more DC / DC converters, one or more battery clusters, and one or more AC / DC converters. In addition, although not shown, the energy storage system also includes one or more battery management systems (BMS). Each battery pack corresponds to a BMS. BMS is generally used to implement functions such as dynamic monitoring of battery pack charging and discharging, battery pack balancing, and evaluation of battery pack charge state.

[0050] When the energy storage system includes multiple battery clusters, the multiple battery clusters are connected in parallel. Among them, a battery cluster is composed of multiple battery packs. Among them, each battery pack includes one or more battery packs (PACKs). In one implementation, each battery pack may also include a battery management unit (BMU), and the energy storage system also includes a battery control unit (BCU). The above-mentioned BMS includes the BMU and the BCU. The BMU is used to monitor the voltage, temperature and other information of the PACK and report the above information to the BCU. The BCU monitors the PCK based on the above information and generates power control instructions for the PACK.

[0051] The PACK in the embodiment may be a single battery or a battery cluster composed of multiple batteries. Specifically, the battery may be a combination of one or more of a lead-carbon battery, a lithium iron phosphate battery, a ternary lithium battery, a sodium sulfur battery, and a flow battery.

[0052] In an energy storage system, one end of a DC / DC converter is connected to a photovoltaic panel, and the other end is connected to a battery cluster. The DC / DC converter performs power conversion processing, such as voltage stabilization, on the DC power from the photovoltaic panel before outputting it to the battery cluster. One end of an AC / DC converter is connected to the battery cluster, and the other end is connected to the AC grid and / or AC battery. The AC / DC converter converts the DC power from the battery into AC power, which is then supplied to a load or the grid.

[0053] In one possible implementation, although not shown, another DC / DC converter may be configured between the AC / DC converter and the battery cluster. The other DC / DC converter is used to perform power conversion processing such as boosting on the DC power from the battery cluster.

[0054] The energy storage system may further include a thermal management system that cools part or all of the components in the battery cluster, DC / DC converter, and DC / AC converter in the energy storage system through a coolant.

[0055] The structure of the thermal management system of the present application will be described in detail below with reference to FIG. 3 to FIG. 7 .

[0056] Figure 3 shows a logical architecture diagram of an example of a thermal management system of the present application. As shown in Figure 3, the thermal management system includes a coolant circulation system, a refrigerant circulation system, and a heat exchange system.

[0057] The coolant circulation system uses a coolant as a thermal management medium. By way of example and not limitation, the coolant may include water. Furthermore, when performing thermal management on the battery, the coolant may be deionized to prevent electrical conductivity. Furthermore, when the energy storage system or photovoltaic inverter system is used in cold regions, antifreeze may be added to the coolant to prevent it from freezing.

[0058] Refrigerant circulation systems use refrigerants as a heat management medium. Refrigerants, also known as refrigerants, coolants, or refrigerants, are the medium used to convert energy in various heat engines. These substances typically increase power through reversible phase changes (such as gas-liquid).

[0059] In the present application, the refrigerant is a working fluid used to transfer heat energy and produce a freezing effect. In other words, the refrigerant can transfer heat through evaporation and condensation. The refrigerant can be a substance that easily absorbs heat to become a gas and easily releases heat to become a liquid. For example, the refrigerant is an intermediate substance in the refrigeration process. It first receives the coldness of the refrigerant and cools down, and then cools other cooled substances. As an example and not a limitation, in the present application, the refrigerant may include ammonia, air, water, brine, chlorofluorocarbons (or chlorofluorocarbons), etc. In the present application, the gaseous refrigerant releases heat to become a liquid when under pressure, and absorbs heat when the high-pressure liquid is decompressed to become a gas.

[0060] As shown in FIG3 , the heat exchange system includes an evaporator. Although not shown in the figure, the evaporator includes a coolant channel and a refrigerant channel respectively. Thus, the coolant and the refrigerant can exchange heat in the evaporator. In the present application, in order to facilitate heat exchange, the evaporator is made of a material with high thermal conductivity such as metal. As shown in FIG3 , the evaporator includes two refrigerant interfaces and two coolant interfaces. The refrigerant can enter the evaporator from one refrigerant interface and be discharged from the other refrigerant interface after heat exchange with the coolant. The coolant can enter the evaporator from one coolant interface and be discharged from the other coolant interface after heat exchange with the refrigerant.

[0061] The thermal management system of the present application may include a cooling mode and a heating mode. In the cooling mode, a low-temperature, low-pressure refrigerant enters the evaporator to perform heat exchange with the coolant, thereby cooling the coolant. That is, in the cooling mode, heat is transferred from the coolant to the refrigerant, causing the coolant to heat up and the coolant to cool down. In the heating mode, a high-temperature, high-pressure refrigerant enters the evaporator to perform heat exchange with the coolant, thereby heating the coolant. That is, in the heating mode, heat is transferred from the refrigerant to the coolant, causing the coolant to heat up and the refrigerant to cool down.

[0062] As an example and not a limitation, the pipes in the evaporator through which the refrigerant and the coolant circulate can be made of a material with good thermal conductivity, such as a metal material (eg, an alloy material such as iron, copper or stainless steel).

[0063] Figure 3 shows a schematic diagram of an example of a refrigerant circulation system. As shown in Figure 3, the refrigerant circulation system includes but is not limited to the following components:

[0064] A.Compressor

[0065] The compressor includes an input port and an output port. A low-temperature gaseous refrigerant can enter the compressor through the input port. The compressor compresses the gaseous refrigerant, converting it from a low-temperature gaseous state to a high-temperature gaseous state. The compressed refrigerant is then output through the output port.

[0066] A gas compressor is a machine that compresses gas and simultaneously increases its pressure. Based on their operating principle, compressors can be categorized as positive-displacement and aerodynamic. Positive-displacement compressors introduce gas into a confined space, compressing the volume of the space where the original gas is dispersed, thereby increasing the internal pressure and converting mechanical energy into pressure energy. Depending on the compression method, they can be categorized as reciprocating, rotary, scroll, and screw types. Aerodynamic compressors use the high-speed rotation of an impeller to force the gas to flow at high speed, generating kinetic energy. As the gas passes through the booster ring, the increased cross-sectional area reduces the air flow rate, converting the kinetic energy into pressure energy and increasing the pressure. Currently, this type of compressor includes centrifugal and axial flow types. Based on lubrication method, they can be divided into oil-free and oil-lubricated air compressors. Based on performance, they can be categorized into low-noise, variable-frequency, and explosion-proof types. Based on performance, they can be categorized into fixed, mobile, and enclosed types.

[0067] In the present application, one compressor may be used, or multiple compressors may be used in parallel or in series, which is not particularly limited in the present application.

[0068] B.Condenser

[0069] The condenser includes two interfaces. The refrigerant can enter the condenser from one interface and be output from the other interface. Alternatively, the refrigerant can also enter the condenser through the other interface and be output from the one interface. The condenser is used to cool the refrigerant and condense it into a liquid refrigerant or a gas-liquid two-phase refrigerant. For example, the refrigerant can be heat-exchanged with a coolant, or the refrigerant can be heat-exchanged with the outside air. In addition, the condenser may also include a fan (not shown in the figure) for controlling the flow rate of the outside air (or controlling the cooling speed).

[0070] Among them, the condenser (also known as an evaporator, heat exchanger or heat exchange equipment) is a device used to transfer heat from a hot fluid to a cold fluid to meet the specified process requirements. It is an industrial application of convective heat transfer and heat conduction. The condenser is a device that can condense a gaseous substance into a liquid. It is a common heat exchanger, and generally uses cooling to condense the substance. During the condensation process, the substance releases latent heat and part of the sensible heat, which increases the refrigerant temperature of the condenser. That is, in the condenser, heat is transferred from the refrigerant to the air or coolant. As an example and not a limitation, the condenser can be configured outdoors so that the refrigerant can exchange heat with the external environment, that is, release heat or cold to the external environment. Alternatively, the condenser can also be inherited on the refrigerant flow channel plate described later.

[0071] In addition, in the present application, one condenser may be used, or multiple condensers may be used in parallel or in series.

[0072] As shown above, when the coolant and the refrigerant are heat exchanged to condense the refrigerant, the condenser can also be regarded as belonging to the above-mentioned heat exchange system.

[0073] C. Expansion valve

[0074] An expansion valve has two ports. Refrigerant can enter the expansion valve through one port and exit through the other. Alternatively, refrigerant can enter the expansion valve through the other port and exit through the first port. The expansion valve reduces the pressure (or, in other words, releases or throttles) of the high-pressure refrigerant it receives, producing a low-temperature refrigerant.

[0075] An expansion valve, also known as a thermal expansion valve or throttle valve, is used to throttle medium-temperature, high-pressure liquid refrigerant through its throttling mechanism, turning it into low-temperature, low-pressure wet steam. The refrigerant then absorbs heat in the heat exchange plate to achieve a cooling effect.

[0076] In the present application, the expansion valve consists of three major parts: the valve body, the temperature-sensing bulb, and the balancing tube. The temperature-sensing bulb is filled with refrigerant in a saturated state of gas-liquid equilibrium, and this part of the refrigerant is not connected to the refrigerant in the system. It is generally tied to the evaporator outlet pipe and is in close contact with the pipe to sense the superheated steam temperature at the evaporator outlet. Since the refrigerant inside it is saturated, the pressure of the saturated state at the temperature is transferred to the valve body according to the temperature. One end of the balancing tube is connected to a position slightly away from the temperature-sensing bulb at the evaporator outlet and is directly connected to the valve body through a capillary tube. Its function is to transfer the actual pressure of the evaporator outlet to the valve body. There are two diaphragms in the valve body. The diaphragms move upward under the action of pressure to reduce the flow of refrigerant through the expansion valve, seeking balance in dynamics.

[0077] The thermal expansion valve is installed at the inlet of the evaporator and is often called an expansion valve. It has two main functions:

[0078] 1) Throttling effect: After the high-temperature and high-pressure liquid refrigerant passes through the throttle hole of the expansion valve, it becomes a low-temperature and low-pressure mist-like hydraulic refrigerant, creating conditions for the evaporation of the refrigerant;

[0079] 2) Controlling the refrigerant flow: Liquid refrigerant entering the evaporator evaporates from liquid to gas after passing through the evaporator, absorbing heat and lowering the temperature of the object being managed (for example, a car battery). The expansion valve controls the refrigerant flow, ensuring that the evaporator outlet is completely filled with gaseous refrigerant. If the flow is too high, liquid refrigerant may enter the compressor and cause liquid hammer. If the flow is too low, evaporation will complete prematurely, resulting in insufficient cooling.

[0080] In the present application, the refrigerant circulation system further includes a refrigerant flow channel plate, in which refrigerant channels for connecting various devices or ports in the refrigerant circulation system are integrated.

[0081] The following describes in detail the flow path, temperature changes, and gas phase changes of the refrigerant in the refrigerant circulation system.

[0082] As shown in Figure 3, the compressor compresses the low-temperature, low-pressure gaseous refrigerant, and the compressed high-temperature, high-pressure gaseous refrigerant is discharged. The high-temperature, high-pressure refrigerant flows through the flow channel integrated in the refrigerant flow channel plate and flows into the condenser.

[0083] The high-temperature and high-pressure gaseous refrigerant exchanges heat with the low-temperature medium (for example, air or coolant in the coolant circulation system) in the condenser. The low-temperature and high-pressure refrigerant (the gas phase is liquid phase or gas-liquid two-phase) formed after the heat exchange is discharged. The low-temperature and high-pressure refrigerant passes through the flow channel integrated in the refrigerant flow channel plate and flows into the expansion valve.

[0084] The low-temperature, high-pressure refrigerant releases pressure and heat in the expansion valve, converting to a low-temperature, low-pressure refrigerant (the gas phase is liquid or both). This low-temperature, low-pressure refrigerant passes through the flow channel integrated in the refrigerant flow channel plate and reaches the refrigerant inlet of the evaporator.

[0085] In the evaporator, the low-temperature, low-pressure refrigerant exchanges heat with the high-temperature coolant (specifically, absorbs heat) to form a high-temperature, low-pressure refrigerant (the gas phase is gas phase or gas-liquid two-phase). The high-temperature, low-pressure refrigerant passes through the flow channel integrated in the refrigerant flow channel plate and flows into the inlet of the compressor.

[0086] Thus, the heat cycle process of the refrigerant is completed.

[0087] As mentioned above, chemical substances used as refrigerants are usually corrosive, and the temperature difference is large during gas-liquid conversion. Therefore, in this application, corrosion-resistant and high- and low-temperature resistant materials such as metals are used to make various components in the refrigerant cycle, such as refrigerant flow plates and expansion valves.

[0088] It should be understood that the structure of the refrigerant circulation system listed above is merely illustrative and the present application is not limited thereto. For example, as shown in FIG8 , the refrigerant circulation system of the present application may further include a liquid storage tank and a gas-liquid separator. The liquid storage tank is used to store and supply refrigerant to the refrigerant circulation system. The gas-liquid separator is used to prevent the refrigerant from hitting the compressor, ensuring the safe and normal operation of the compressor. Its working principle is that when the gas-liquid two-phase refrigerant enters the gas-liquid separator, the expansion rate decreases, causing the liquid to separate or hit a baffle, thereby separating the liquid.

[0089] Returning to FIG3 , the coolant circulation system includes a pump and a cold plate.

[0090] The pump is used to transfer mechanical energy or other external energy to the coolant, thereby increasing the coolant energy and accelerating the flow rate and pressure of the coolant.

[0091] The cold plate is disposed near a thermal management object (eg, a battery cluster) and is capable of heat transfer with the thermal management object.

[0092] It should be noted that when coolant is used as the medium for heat exchange with the refrigerant in the condensing plate, the coolant circulation system should include a coolant flow channel for connecting the pump with the coolant inlet of the condenser. Hereinafter, unless otherwise specified, the connection between two devices or ports can be understood as the connection between the two devices or ports through the coolant channel.

[0093] In the present application, the coolant circulation system further includes a coolant flow channel plate, in which coolant channels for connecting various devices or ports are integrated.

[0094] The flow path and temperature changes of the coolant in the coolant circulation system are described in detail below.

[0095] The coolant is pumped into the evaporator, where it undergoes heat exchange with the low-temperature refrigerant and is cooled. The low-density coolant then enters the cold plate, exchanges heat with the battery cluster, and flows back to the evaporator to be cooled again, completing the coolant's thermal cycle.

[0096] As mentioned above, since the coolant has low corrosiveness and the temperature change after heat exchange is small, in this application, low-cost waterproof materials such as plastic or rubber are used to make various components in the refrigerant cycle, such as the coolant flow channel plate.

[0097] It should be understood that the structure of the coolant circulation system listed above is only an example, and the present application is not limited thereto. For example, the coolant circulation system of the present application may also include a coolant tank and an expansion tank. The coolant tank is used to replenish coolant to the coolant circulation system to make up for the loss caused by coolant evaporation, etc. The function of the expansion tank is to control the pressure of the coolant circulation system to avoid excessive pressure. When the coolant temperature rises, its volume will expand. When the coolant expands to a certain extent, the pressure regulating valve located in the expansion tank will open, allowing part of the coolant to flow out of the coolant circulation system, thereby achieving the purpose of pressure relief.

[0098] Figure 3 illustrates the structure of a thermal management system used to cool a battery cluster. However, the thermal management system of this application is not limited to this. For example, when an energy storage system or a photovoltaic inverter system is used in a low-temperature environment, the battery cluster needs to be heated. Figure 4 shows the case where a heater is used to provide a heating source for the coolant, and Figure 5 shows the case where a refrigerant circulation system is used to provide a heating source for the coolant.

[0099] In the thermal management system shown in Figure 4, when the battery needs to be heated, the refrigerant circulation system can be turned off. That is, the coolant does not exchange heat with the refrigerant in the evaporator. After being heated by the heater, it enters the cold plate under the action of the pump, thereby supplying heat to the battery through the cold plate.

[0100] As shown in Figure 5, when a refrigerant circulation system provides a heat source for the coolant, a four-way valve can be provided to switch the refrigerant circulation system between cooling and heating modes. As shown in Figure 5, the four-way valve includes a first port 11, a second port 12, a third port 13, and a fourth port 14. The first port communicates with the compressor input, the second port 12 communicates with the condenser, the third port 13 communicates with the compressor output, and the fourth port communicates with the evaporator. Although not shown, the pipes connecting the ports are integrated into the refrigerant channel plate.

[0101] A four-way valve can also be called a four-way reversing valve, which is a control valve with four ports (also called interfaces or oil ports). As an example and not a limitation, in this application, the working principle of the four-way valve is: when the solenoid valve coil is in the power-off state, the pilot slide valve moves to the left under the drive of the right compression spring, and the high-pressure gas enters the capillary tube and then enters the right end piston chamber. On the other hand, the gas in the left end piston chamber is discharged. Due to the pressure difference between the two ends of the piston, the piston and the main slide valve move to the left, so that the second port 12 is connected to the third port 13, and the first port 11 is connected to the fourth port 14, so that the thermal management system works in the cooling mode. The temperature and gas phase transformation of the refrigerant in the cooling mode have been explained above.

[0102] When the solenoid valve coil is energized, the pilot slide valve shifts rightward under the magnetic force generated by the solenoid valve, overcoming the tension of the compression spring. High-pressure gas enters the capillary tube and then the left piston chamber. Meanwhile, gas in the right piston chamber is discharged. Due to the pressure differential across the piston, the piston and main slide valve shift rightward, connecting the third port 13 with the fourth port 14 and the first port 11 with the second port 12, thereby placing the thermal management system in heating mode. In heating mode, high-temperature, high-pressure gaseous refrigerant flows from the compressor's output port into the third port 13 of the four-way valve and enters the evaporator through the fourth port 14. Within the evaporator, this high-temperature, high-pressure gaseous refrigerant undergoes heat exchange with the coolant, raising the coolant's temperature. The refrigerant, converted to low-temperature, high-pressure refrigerant through heat exchange, is decompressed in the thermal expansion valve, converting to low-temperature, low-pressure refrigerant. Further cooling occurs in the condenser, converting it to low-temperature, low-pressure refrigerant before flowing into the compressor through the second port 12 and first port 11 of the four-way valve.

[0103] Affected by seasonal changes, for example, in spring and autumn, the compressor can be stopped from working to save energy. In this case, the scheme shown in Figure 6 or Figure 7 can be adopted to cool the coolant.

[0104] As shown in Figure 6, the coolant circulation system further includes a radiator and a three-way valve, which includes ports 21, 22, and 23. Port 21 is connected to the evaporator, port 23 is connected to the radiator, and port 22 is connected to the pump.

[0105] When the refrigerant circulation system is in operation, ports 21 and 22 of the three-way valve are connected, and port 23 is closed. At this time, the coolant is cooled by the refrigerant, and this process has been described above.

[0106] When the refrigerant circulation system stops operating, ports 22 and 23 of the three-way valve are connected. The pump operates to heat the coolant between the cold plate and the battery cluster, raising its temperature. It then cools down through heat exchange between the radiator and the external environment. The cooled coolant is then re-delivered to the cold plate through ports 23 and 22 of the three-way valve. The functions and connections of the other components of the thermal management system in Figure 6 are similar to those described in Figures 3 through 5 above, and their detailed descriptions are omitted here.

[0107] As shown in Figure 7, the refrigerant circulation system also includes a fluorine pump and two bypass valves, one of which is a bypass valve A used to bypass the compressor, and the other is a bypass valve B used to bypass the fluorine pump. When the compressor is required to work, the bypass valve B bypasses the fluorine pump and the compressor works normally. The circulation process in this case has been described above. When the compressor is required to stop working, the bypass valve A bypasses the compressor, the fluorine pump starts, and the refrigerant heats up after heat exchange with the coolant in the evaporator. The heated refrigerant is directly cooled after heat exchange in the condenser. The cooled refrigerant overcomes the pipe resistance under the action of the fluorine pump and returns to the evaporator to continue heat exchange, achieving energy-saving effects. In addition, the functions and connection relationships of the other components of the thermal management system in Figure 7 are similar to the functions and connection relationships of the same components described in Figures 3 to 5 above, and their detailed descriptions are omitted here.

[0108] In addition to the battery cluster, the thermal management system of the present application can also be used to cool the aforementioned DC / DC converter or AC / DC converter. In this case, the coolant circulation system also includes a multi-way valve. As shown in Figure 8, port 1 of the multi-way valve is connected to the coolant inlet of the condenser plate. It should be noted that, although not shown, the coolant circulation system should include a coolant flow channel for connecting port 1 of the multi-way valve to the coolant inlet of the condenser. The coolant outlet of the condenser is connected to port 2 of the multi-way valve. Port 3 of the multi-way valve is connected to the coolant inlet of the evaporator, and the coolant outlet of the evaporator is connected to port 4 of the multi-way valve. Port 4 of the multi-way valve is connected to the inlet of the heater. The coolant flowing out of the heater outlet can undergo heat exchange with the battery cluster. After heat exchange, the coolant can flow into the inlet of the pump. The outlet of the pump is connected to port 6 of the multi-way valve. The coolant flowing out of port 8 of the multi-way valve can undergo heat exchange with the AC / DC converter or DC / DC converter. After heat exchange, the coolant can flow into the port of the multi-way valve. The port 10 of the multi-way valve is in communication with the inlet of the radiator, the outlet of the radiator is in communication with the inlet of the pump, and the outlet of the pump is in communication with the port 9 of the multi-way valve.

[0109] The low-temperature coolant flows out of port 1 of the multi-way valve, passes through the flow channel integrated in the coolant manifold, and enters the coolant inlet of the condenser. Inside the condenser, the low-temperature coolant exchanges heat with the high-temperature refrigerant, raising its temperature to form high-temperature coolant. The high-temperature coolant flows out of the coolant outlet of the condenser, passes through the flow channel integrated in the coolant manifold, and enters port 2 of the multi-way valve.

[0110] When the thermal management object needs to be heated (for example, when the outside temperature is low and the battery cluster needs to be heated), the multi-way valve 210 controls the connection between port 2 and port 5. The high-temperature coolant flows out of port 5 of the multi-way valve 210 and, under the action of the pump 225, flows into the battery cluster and undergoes heat exchange with the battery cluster to form a low-temperature coolant. After that, it flows into port 6 of the multi-way valve 210 under the action of the pump 225. It should be noted that when the new coolant circulation system includes a heater 240, the high-temperature coolant can be further heated by the heater 240 before flowing into the battery cluster. In addition, the multi-way valve 210 can control the connection between port 6 and port 1, thereby allowing the low-temperature coolant to undergo heat exchange with the high-temperature refrigerant in the condenser plate 310 to form a high-temperature coolant.

[0111] The high-temperature coolant flows out of port 3 of the multi-way valve, passes through the flow channel integrated into the coolant channel plate, and enters the coolant inlet of the evaporator. Inside the evaporator, the high-temperature coolant exchanges heat with the low-temperature refrigerant and cools down to form low-temperature coolant.

[0112] The low-temperature coolant flows out from the coolant outlet of the evaporator, passes through the flow channel integrated in the coolant flow channel plate, and enters port 4 of the multi-way valve.

[0113] When the battery cluster needs to be cooled, the multi-way valve controls the connection between port 4 and port 5. Low-temperature coolant flows out of port 5 of the multi-way valve and, under the action of a pump, flows into the battery cluster, undergoes heat exchange with the battery cluster, and forms high-temperature coolant. The high-temperature coolant then flows into port 6 of the multi-way valve under the action of a pump. Furthermore, the multi-way valve can control the connection between port 6 and port 3, allowing the high-temperature coolant to undergo heat exchange with the low-temperature refrigerant in the evaporator, forming low-temperature coolant.

[0114] When cooling the AC / DC converter or DC / DC converter is required, the multi-way valve controls port 4 to connect with port 8. Low-temperature coolant flows out of port 8 of the multi-way valve, flows through the coolant pipeline into the AC / DC converter or DC / DC converter, and exchanges heat with the AC / DC converter or DC / DC converter to form high-temperature coolant, which then flows into port 7 of the multi-way valve. Furthermore, the multi-way valve can control port 7 to connect with port 3, allowing the high-temperature coolant to exchange heat with the low-temperature refrigerant in the evaporator 320 to form low-temperature coolant.

[0115] In addition, the multi-way valve controls the connection between port 4 and port 10. Under the action of the pump, low-temperature coolant flows out of port 10 of the multi-way valve, flows through the coolant pipe into the radiator, and exchanges heat with the external environment in the radiator to form low-temperature coolant, which then flows into port 9 of the multi-way valve. Furthermore, the multi-way valve can control the connection between port 9 and port 1, thereby allowing the low-temperature coolant to exchange heat with the high-temperature refrigerant in the condenser to form high-temperature coolant. In this way, the thermal cycle process of the coolant is completed.

[0116] It should be understood that the structures of the coolant circulation systems listed above are merely exemplary and the present application is not limited thereto. For example, the coolant circulation system of the present application may not include a heater.

[0117] The components of the thermal management system of the present application are described in detail below with reference to Figures 9 to 16. In order to reduce the difficulty of installation and maintenance, multiple components or assemblies in the thermal management system of the present application are integrated.

[0118] The thermal management system includes a refrigerant flow channel plate and a plurality of refrigerant end components integrated on the refrigerant flow channel plate.

[0119] In addition, the thermal management system further includes a coolant flow channel plate and a plurality of coolant end components integrated on the coolant flow channel plate.

[0120] In addition, a condenser and / or an evaporator is integrated on the refrigerant flow channel plate.

[0121] FIG9 is a schematic diagram of an example of a refrigerant flow channel plate. As shown in FIG9 , the refrigerant flow channel plate is formed into a plate shape extending along a first plane, which is a plane formed by the X-axis and the Y-axis shown in FIG9 . That is, the refrigerant flow channel plate is formed with two relatively large surfaces, one of which is called a configuration surface and the other is called a mounting surface. The configuration surface is formed as a whole into a generally planar shape, but it does not exclude the possibility of having some concave and convex portions due to design and application requirements. That is, the configuration surface of the refrigerant flow channel plate is formed as a whole into a shape that is generally parallel to the first plane formed by the X-axis and the Y-axis.

[0122] When the thermal management system is in normal use, the first plane is parallel to the direction of gravity. That is, the Y-axis can be understood as the height direction of the thermal management system when in normal use, the Z-axis shown in Figure 9 can be understood as the thickness direction of the thermal management system when in normal use, and the X-axis can be understood as the width direction of the thermal management system when in normal use. In this case, when the thermal management system is in normal use, the X-axis is perpendicular to the direction of gravity, and the Y-axis is parallel to the direction of gravity.

[0123] Multiple components of the refrigerant circulation system are arranged on the configuration plane of the refrigerant flow channel plate. For example, when the thermal management system includes the structure shown in Figure 3, the refrigerant flow channel plate can be integrated with the above-mentioned compressor, expansion valve, evaporator and condenser.

[0124] In one implementation, as shown in Figure 9, the refrigerant flow plate is equipped with a compressor, an expansion valve, a condenser, and an evaporator. Furthermore, the positions of the compressor, expansion valve, condenser, and evaporator on the refrigerant flow plate can be arbitrarily configured according to actual needs.

[0125] For example, as shown in FIG9 , in the Y-axis direction, the compressor is located below the expansion valve.

[0126] For another example, the heat exchange assembly composed of the condenser and the evaporator and the compressor can be arranged in a row in the X-axis direction.

[0127] The condenser and the evaporator may be arranged in parallel in the X-axis direction, or the condenser and the evaporator may be arranged in parallel in the Y-axis direction, which is not particularly limited in the present application.

[0128] Furthermore, in the X-axis direction, the expansion valve and the compressor are located on both sides of the condenser (or evaporator).

[0129] In addition, although not shown, the refrigerant flow channel plate is provided with at least one through-hole extending through the thickness of the refrigerant flow channel plate. The through-hole is used to accommodate a condenser communication pipe connecting the coolant flow channel plate (specifically, the flow channel in the coolant flow channel plate) and the condenser, and an evaporator communication pipe connecting the coolant flow channel plate and the evaporator.

[0130] For example, the through hole can be one, in which case both the condenser connecting pipe and the evaporator connecting pipe are accommodated in the one through hole. In this case, the evaporator and the condenser can be arranged close to each other, that is, a portion of the through hole is covered by the evaporator, and another portion of the through hole is covered by the condenser. In addition, the interfaces for connecting the pipes of the evaporator and the condenser can be arranged in the area covering the through hole, so that the pipes can be easily accommodated in the through hole. In addition, the area of ​​the through hole can be reduced, which is conducive to reducing the complexity of processing and improving the strength of the refrigerant flow channel plate.

[0131] For another example, there could be two through-holes. In this case, one through-hole houses the condenser connecting pipe, while the other houses the evaporator connecting pipe. Furthermore, the interfaces for connecting the evaporator and condenser pipes can be located within the area covering the through-holes, making it easy to accommodate the pipes within the through-holes. In this case, the positions of the through-holes can be adjusted accordingly based on the positions of the evaporator and condenser, thereby increasing layout flexibility.

[0132] In another implementation, as shown in FIG10 , unlike the solution shown in FIG9 , the refrigerant flow channel plate is further configured with the aforementioned liquid storage tank and gas-liquid separator. For example, the liquid storage tank, gas-liquid separator, and expansion valve can be arranged side by side in the X-axis direction. The liquid storage tank and gas-liquid separator are located above the compressor in the Y-axis direction. Furthermore, in the X-axis direction, the liquid storage tank and gas-liquid separator are located on the same side of the expansion valve.

[0133] In yet another implementation, as shown in FIG11 , unlike the solutions shown in FIG9 and FIG10 , a four-way valve is further configured on the refrigerant flow channel plate. For example, the four-way valve and the expansion valve can be arranged side by side in the X-axis direction. In the Y-axis direction, the four-way valve is located above the condenser and evaporator. Furthermore, in the X-axis direction, the four-way valve and the expansion valve are located on the same side of the liquid storage tank.

[0134] In yet another implementation, different from the solutions shown in FIG. 9 to FIG. 11 , as shown in FIG. 12 , the number of the compressors may be multiple, for example, 2, and the multiple compressors may be arranged in parallel in the X-axis direction.

[0135] It should be noted that, as shown above, the components included in the refrigerant circulation system may be different depending on actual needs. In this case, the components integrated on the refrigerant flow channel plate can be changed according to actual needs. For example, if the volume or mass of the device configured on the refrigerant flow channel plate shown in Figures 9 to 11 is large, the device can also be configured independently and connected to the refrigerant flow channel plate (specifically, the refrigerant flow channel in the refrigerant flow channel plate) through a pipeline.

[0136] The coolant flow channel plate is formed into a plate-like shape extending along a first plane, which is the plane defined by the X-axis and the Y-axis as shown in Figure 13. Specifically, the coolant flow channel plate has two relatively large surfaces, one of which is referred to as the configuration surface and the other as the mounting surface. The configuration surface is generally planar, but may have some uneven sections depending on design and application requirements. In other words, the configuration surface of the coolant flow channel plate is generally parallel to the first plane defined by the X-axis and the Y-axis.

[0137] When the thermal management system is in normal use, the first plane is parallel to the direction of gravity. That is, the Y-axis can be understood as the height direction of the thermal management system when in normal use, the Z-axis shown in FIG13 can be understood as the thickness direction of the thermal management system when in normal use, and the X-axis can be understood as the width direction of the thermal management system when in normal use. In this case, when the thermal management system is in normal use, the X-axis is perpendicular to the direction of gravity, and the Y-axis is parallel to the direction of gravity.

[0138] Multiple components of the coolant circulation system are arranged on the configuration plane of the coolant flow channel plate. For example, when the thermal management system includes the structure shown in FIG5 , the coolant tank and the pump are arranged on the configuration plane of the coolant flow channel plate.

[0139] In one implementation, as shown in Figure 13 , the coolant tank is located above the pump in the Y-axis direction. When the thermal management system provided by this application is in normal use, the coolant flow plate is arranged parallel to the direction of gravity. In this case, the coolant tank is located above the pump, allowing coolant to be supplied to the coolant flow plate under the action of gravity.

[0140] In another implementation, unlike the solution shown in Figure 13 , as shown in Figure 14 , the coolant flow channel plate is further configured with an expansion tank. Furthermore, the number of expansion tanks can be one or more, and this application does not specifically limit this. For example, as shown in Figure 14 , the expansion tank and the coolant tank can be arranged side by side along the X-axis.

[0141] In another embodiment, different from the solution shown in Figure 13, a heater is further provided on the coolant flow channel plate, as shown in Figure 14. For example, as shown in Figure 14, the heater is located between the coolant tank and the pump in the Y-axis direction.

[0142] FIG14 illustrates a case where both an expansion tank and a heater are disposed on the coolant flow channel plate. However, the present application is not limited thereto. Alternatively, only one of the expansion tank and the heater may be disposed on the coolant flow channel plate. For example, the expansion tank and the coolant flow channel plate may be disposed independently, with pipes connecting the expansion tank and the coolant flow channel plate (specifically, the coolant flow channels within the coolant flow channel plate).

[0143] In yet another implementation, as shown in Figures 13 and 14 , the coolant flow plate is further configured with a multi-way valve (e.g., the three-way valve described above) as shown in Figure 15 . Furthermore, the multi-way valve is positioned below the coolant tank along the Y-axis. Furthermore, along the X-axis, the pump and the multi-way valve are positioned side by side.

[0144] It should be noted that, as shown above, the components included in the coolant circulation system may vary depending on actual needs. In this case, the components integrated on the coolant flow channel plate can be changed according to actual needs. Among them, the components of the coolant circulation system that are not configured on the coolant flow channel plate can be connected to the coolant flow channel plate (specifically, the coolant flow channels in the coolant flow channel plate) through multiple pipes. In addition, the number of each component can also be adjusted according to needs. In addition, the position of each component on the coolant flow channel plate can be arbitrarily changed according to actual needs, and this application does not specifically limit it.

[0145] In addition, although not shown in the figure, the coolant flow channel plate is also provided with an interface for outputting coolant to the cold plate, and an interface for connecting to the radiator.

[0146] In order to reduce costs, the coolant flow channel plate is usually made of non-metallic materials, which is not conducive to being used as the load-bearing part of the heat exchange system. Therefore, under one idea, the refrigerant flow channel plate made of metal can be used as the load-bearing part of the heat exchange system. In this case, fixing parts for fixing the thermal management system can be installed on the side of the refrigerant flow channel plate. Alternatively, the coolant flow channel plate, which is easy to process and low in cost, can be used as the installation base, on which the coolant circulation system and multiple components of the refrigerant circulation system are installed, and the metal load-bearing parts are independently configured, thereby reducing the size of the refrigerant flow channel plate, thereby reducing the processing difficulty and cost of the refrigerant flow channel plate.

[0147] As shown in FIG16 , in the present application, the refrigerant flow channel plate and the coolant flow channel plate are stacked in the Z-axis direction, that is, the mounting surface of the coolant flow channel plate is in contact with the mounting surface of the refrigerant flow channel plate.

[0148] In addition, although not shown, the refrigerant flow channel plate is provided with a through hole extending from the mounting surface of the refrigerant flow channel plate to the configuration surface, and a pipe for connecting the coolant flow channel in the coolant flow channel plate and the coolant inlet and outlet of the evaporator is accommodated in the through hole.

[0149] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A thermal management system, characterized in that: Including coolant circulation system, refrigerant circulation system and heat exchange components; The coolant circulation system comprises a coolant flow channel plate and a plurality of coolant end components, the coolant flow channel is integrated in the coolant flow channel plate, the coolant flow channel is connected to the plurality of coolant end components, the refrigerant circulation system comprises a refrigerant flow channel plate and a plurality of refrigerant end components, the refrigerant flow channel is integrated in the refrigerant flow channel plate, the refrigerant channel is connected to the plurality of refrigerant end components, the coolant flow channel and the refrigerant channel are connected to the heat exchange component, and the heat exchange component is used for heat exchange between the coolant and the refrigerant; The coolant flow channel plate and the refrigerant flow channel plate are formed in a plate shape, the coolant flow channel plate is adhered and fixed to the refrigerant flow channel plate, the multiple coolant end components are installed on a side of the coolant flow channel plate away from the refrigerant flow channel plate, and the multiple refrigerant end components and the heat exchange component are installed on a side of the refrigerant flow channel plate away from the coolant flow channel plate.

2. The thermal management system according to claim 1, characterized in that: The plurality of coolant end assemblies include a coolant tank and a pump; The coolant tank and the pump are arranged in sequence along a first direction, wherein when the coolant flow channel plate is placed parallel to the direction of gravity, the first direction is parallel to the direction of gravity, and the coolant tank is located above the pump.

3. The thermal management system according to claim 2, wherein the plurality of coolant end assemblies further comprise an expansion tank, wherein the expansion tank and the coolant tank are arranged in parallel in a second direction, wherein the second direction is perpendicular to the first direction and parallel to the coolant flow channel plate.

4. The thermal management system according to claim 1, characterized in that: The refrigerant flow channel plate includes a mounting member, and the mounting member is used for mounting and fixing the thermal management system.

5. The thermal management system according to claim 4, characterized in that: The mounting member is located on a side surface of the refrigerant flow channel plate, and the side surface is parallel to a thickness direction of the refrigerant flow channel plate.

6. The thermal management system according to claim 1, characterized in that: The heat exchange element is installed on a side of the refrigerant flow channel plate away from the coolant flow channel plate; The refrigerant flow channel plate includes at least one through hole penetrating the refrigerant flow channel plate in a thickness direction. A pipe is housed in the at least one through hole. The pipe is used to connect the heat exchange element and the flow channel in the coolant flow channel plate.

7. The thermal management system according to claim 6, characterized in that: The number of the through hole is one, and a part of the through hole is within the coverage range of the condenser on the refrigerant flow channel plate, and the other part of the through hole is within the coverage range of the evaporator on the refrigerant flow channel plate.

8. The thermal management system according to claim 6, characterized in that: The number of through holes is two, and one through hole is within the coverage range of the condenser on the refrigerant flow channel plate, and the other through hole is within the coverage range of the evaporator on the refrigerant flow channel plate.

9. The thermal management system according to claim 1, characterized in that: The multiple coolant end assemblies also include a multi-way valve, which is arranged in sequence along the first direction between the coolant tank and the multi-way valve, wherein when the coolant flow channel plate is placed parallel to the direction of gravity, the coolant tank is located above the multi-way valve.

10. The thermal management system according to claim 1, characterized in that: The plurality of coolant end assemblies further include a heater, which is arranged in sequence along a first direction between the coolant tank and the heater, wherein the coolant tank is located above the heater when the coolant channel plate is placed parallel to the direction of gravity.

11. The thermal management system according to any one of claims 1 to 10, characterized in that: The multiple refrigerant end components include at least one of the following devices: a compressor, an expansion valve, a fluorine pump, a liquid storage tank, a four-way valve or a gas-liquid separator.

12. An energy storage system, characterized in that: include: A battery cluster and a thermal management system according to any one of claims 1 to 11, wherein the thermal management system uses a coolant to perform heat exchange with the battery cluster.

13. A photovoltaic inverter system, characterized in that: include: A photovoltaic panel, a photovoltaic inverter, an energy storage system and a thermal management system as described in any one of claims 1 to 11, wherein the photovoltaic panel is used to convert solar energy into electrical energy, the energy storage system includes a battery cluster, the battery cluster is used to store electrical energy from the photovoltaic panel, the photovoltaic inverter is used to convert direct current from the photovoltaic panel into alternating current, and the thermal management system uses a coolant to perform heat exchange with the battery cluster in the energy storage system and / or the power converter in the photovoltaic inverter.

Images