CN221178225U - Thermal management system, energy storage system and photovoltaic inversion system - Google Patents

Thermal management system, energy storage system and photovoltaic inversion system Download PDF

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Publication number
CN221178225U
CN221178225U CN202322385242.4U CN202322385242U CN221178225U CN 221178225 U CN221178225 U CN 221178225U CN 202322385242 U CN202322385242 U CN 202322385242U CN 221178225 U CN221178225 U CN 221178225U
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cooling liquid
refrigerant
plate
coolant
thermal management
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吴迎文
李马林
刘欢
王彦忠
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Huawei Digital Power Technologies Co Ltd
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Huawei Digital Power Technologies Co Ltd
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Abstract

The application provides a thermal management system, an energy storage system and a photovoltaic inversion system, which can reduce the difficulty of installation and maintenance. The cooling liquid circulation system comprises a cooling liquid flow passage plate and a plurality of cooling liquid end assemblies, wherein a cooling liquid flow passage is integrated in the cooling liquid flow passage plate and communicated with the cooling liquid end assemblies. The refrigerant circulation system comprises a refrigerant flow channel plate and a plurality of refrigerant end assemblies, wherein a refrigerant flow channel is integrated in the refrigerant flow channel plate and is communicated with the plurality of refrigerant end assemblies. The cooling liquid flow passage and the cooling medium passage are communicated with the heat exchange component, and the heat exchange component is used for heat exchange between the cooling liquid and the cooling medium. The cooling liquid flow passage plate and the cooling medium flow passage plate are formed in a plate shape. The cooling liquid flow passage plate is attached and fixed with the cooling medium flow passage plate. The plurality of cooling liquid end components are arranged on one surface of the cooling liquid flow passage plate, which is away from the cooling liquid flow passage plate. The plurality of refrigerant end assemblies and the heat exchange assembly are arranged on one surface of the refrigerant flow channel plate, which is away from the cooling liquid flow channel plate.

Description

Thermal management system, energy storage system and photovoltaic inversion system
Technical Field
The application relates to the technical field of thermal management, in particular to a thermal management system, an energy storage system and a photovoltaic inversion system.
Background
With the vigorous development of new energy technologies, energy storage technologies are also becoming more important. In addition to the battery clusters for storing electric energy and the electronic devices for managing the battery clusters, the existing energy storage system further includes a thermal management system for heating or radiating the battery clusters and the electronic devices in order to ensure the performance and safety of the battery clusters and the electronic devices.
In one prior art, a refrigerant is directly used to exchange heat with a thermal management object, so as to realize cooling or heating of the thermal management object, but the conventional refrigerant is usually a chemical substance, on one hand, in order to corrode the pipeline, a corrosion-resistant material such as metal is required, and the cost is increased. On the other hand, when the leakage and other conditions occur, the cleaning difficulty is high, and the damage to the human body and the environment is easy to cause.
In this regard, there has been proposed a secondary cooling technique in which a coolant such as water is used to exchange heat with a refrigerant, and the heat-exchanged coolant is used to cool or heat a thermal management object. Because the coolant has low corrosiveness and low requirements on pipeline materials, for example, plastics and the like can be used, so that the cost is greatly reduced. In addition, the main component of the cooling liquid is water, and when leakage and other conditions occur, the cleaning difficulty is low, and the harm to human bodies and the environment is low.
However, the secondary cooling technology needs to arrange a cooling liquid loop and a refrigerant loop, so that the problems of high cost, complex installation, large occupied space and the like of a thermal management system are caused. Especially, under the condition that a large number of battery clusters need to be thermally managed in a power station and the like, the number of pipelines is large, the connection relationship is complex, and the installation and maintenance difficulties are large.
Disclosure of utility model
The application provides a thermal management system, an energy storage system and a photovoltaic inversion system, which can reduce the difficulty of installation and maintenance.
In a first aspect, a thermal management system is provided that includes a coolant circulation system, and a heat exchange member. The cooling liquid circulation system comprises a cooling liquid flow passage plate and a plurality of cooling liquid end assemblies, wherein a cooling liquid flow passage is integrated in the cooling liquid flow passage plate and communicated with the cooling liquid end assemblies. The refrigerant circulation system comprises a refrigerant flow channel plate and a plurality of refrigerant end assemblies, wherein a refrigerant flow channel is integrated in the refrigerant flow channel plate and is communicated with the plurality of refrigerant end assemblies. The cooling liquid flow passage and the cooling medium passage are communicated with the heat exchange component, and the heat exchange component is used for heat exchange between the cooling liquid and the cooling medium. The cooling liquid flow passage plate and the cooling medium flow passage plate are formed in a plate shape. The cooling liquid flow passage plate is attached and fixed with the cooling medium flow passage plate. The plurality of cooling liquid end components are arranged on one surface of the cooling liquid flow channel plate (namely, the arrangement surface of the cooling liquid flow channel plate) which faces away from the cooling liquid flow channel plate. The plurality of refrigerant end assemblies and the heat exchange assembly are arranged on one surface of the refrigerant flow channel plate (namely, the arrangement surface of the refrigerant flow channel plate) which is away from the cooling liquid flow channel plate.
The cooling liquid circulation system comprises a cooling liquid flow channel plate, a cooling liquid flow channel plate and a cooling liquid flow channel plate, wherein the cooling liquid flow channel plate is provided with a cooling liquid flow channel, and the cooling liquid flow channel plate is provided with a cooling liquid flow channel.
The coolant end assembly includes one or more of the following: a cooling liquid tank, a pump, a heater and a multi-way valve.
The refrigerant end assembly comprises one or more of the following components: compressor, expansion valve, fluorine pump, liquid storage pot, four-way valve or gas-liquid separator.
The heat exchange assembly includes an evaporator and/or a condenser.
In one implementation, the plurality of coolant end assemblies includes a coolant tank and a pump, the coolant tank being located above the pump in a first direction, wherein the first direction is parallel to a direction of gravity when the coolant flow channel plate is placed parallel to the direction of gravity. Therefore, the gravity can be utilized to realize the replenishment of the cooling liquid, and the energy consumption is reduced.
And, this refrigerant runner board includes the installed part, and the installed part is used for this thermal management system's installation fixed. Because the refrigerant flow channel plate is made of metal, the refrigerant flow channel plate can be used as a bearing piece of the thermal management system, so that the stability and the safety of the installation and the configuration of the thermal management system can be improved.
In addition, the case is positioned on the side surface of the refrigerant flow channel plate, and the side surface is parallel to the thickness direction of the refrigerant flow channel plate. Therefore, the space of the refrigerant flow channel plate for installing the configuration plane of the refrigerant component can be saved, and the miniaturization of the heat management system is facilitated.
In one implementation, the heat exchange element is mounted on a side of the refrigerant flow field plate facing away from the coolant flow field plate. The refrigerant flow channel plate comprises at least one through hole penetrating through the thickness direction of the refrigerant flow channel plate, and a pipeline is accommodated in the at least one through hole and is used for communicating the heat exchange piece and the flow channel in the cooling liquid flow channel plate.
For example, the number of through holes is one, and a portion of the through holes is within the coverage of the condenser, and another portion of the through holes is within the coverage of the evaporator. Therefore, the pipeline for communicating the condenser and the evaporator can be accommodated through one through hole, the processing difficulty can be reduced, and the strength of the refrigerant flow passage plate can be improved.
For another example, the number of through holes is two, and one through hole is within the coverage of the condenser and the other through hole 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, flexibility in the layout of the condenser and the evaporator can be improved.
In a second aspect, there is provided an energy storage system comprising: a battery cluster and a thermal management system that uses a coolant to exchange heat with the battery cluster. The cooling liquid circulation system comprises a cooling liquid flow passage plate and a plurality of cooling liquid end assemblies, wherein a cooling liquid flow passage is integrated in the cooling liquid flow passage plate and communicated with the cooling liquid end assemblies. The refrigerant circulation system comprises a refrigerant flow channel plate and a plurality of refrigerant end assemblies, wherein a refrigerant flow channel is integrated in the refrigerant flow channel plate and is communicated with the plurality of refrigerant end assemblies. The cooling liquid flow passage and the cooling medium passage are communicated with the heat exchange component, and the heat exchange component is used for heat exchange between the cooling liquid and the cooling medium. The cooling liquid flow passage plate and the cooling medium flow passage plate are formed in a plate shape. The cooling liquid flow passage plate is attached and fixed with the cooling medium flow passage plate. The plurality of cooling liquid end components are arranged on one surface of the cooling liquid flow passage plate, which is away from the cooling liquid flow passage plate. The plurality of refrigerant end assemblies and the heat exchange assembly are arranged on one surface of the refrigerant flow channel plate, which is away from the cooling liquid flow channel plate.
In a third aspect, a photovoltaic inverter system is provided, which includes: the photovoltaic system comprises a photovoltaic panel, a photovoltaic inverter, an energy storage system and a thermal management system, wherein the photovoltaic panel is used for converting solar energy into electric energy, the energy storage system comprises a battery cluster, the battery cluster is used for storing electric energy from the photovoltaic panel, the photovoltaic inverter is used for converting direct current from the photovoltaic panel into alternating current, and the thermal management system uses cooling liquid to exchange heat with the energy storage system and/or the photovoltaic inverter. The cooling liquid circulation system comprises a cooling liquid flow passage plate and a plurality of cooling liquid end assemblies, wherein a cooling liquid flow passage is integrated in the cooling liquid flow passage plate and communicated with the cooling liquid end assemblies. The refrigerant circulation system comprises a refrigerant flow channel plate and a plurality of refrigerant end assemblies, wherein a refrigerant flow channel is integrated in the refrigerant flow channel plate and is communicated with the plurality of refrigerant end assemblies. The cooling liquid flow passage and the cooling medium passage are communicated with the heat exchange component, and the heat exchange component is used for heat exchange between the cooling liquid and the cooling medium. The cooling liquid flow passage plate and the cooling medium flow passage plate are formed in a plate shape. The cooling liquid flow passage plate is attached and fixed with the cooling medium flow passage plate. The plurality of cooling liquid end components are arranged on one surface of the cooling liquid flow passage plate, which is away from the cooling liquid flow passage plate. The plurality of refrigerant end assemblies and the heat exchange assembly are arranged on one surface of the refrigerant flow channel plate, which is away from the cooling liquid flow channel plate.
The configuration and structure of each component in the thermal management system in the second aspect and the third aspect are similar to those in the first aspect, and detailed descriptions thereof are omitted here to avoid redundancy.
Drawings
Fig. 1 is a schematic configuration diagram of an example of a photovoltaic inverter system to which the thermal management system provided by the present application is applied.
Fig. 2 is a schematic architecture diagram of an example of an energy storage system to which the thermal management system provided by the present application is applied.
FIG. 3 is a block diagram of an example of a thermal management system provided by the present application.
FIG. 4 is a block diagram of another example of a thermal management system provided by the present application.
FIG. 5 is a block diagram of another example of a thermal management system provided by the present application.
FIG. 6 is a block diagram of another example of a thermal management system provided by the present application.
FIG. 7 is a block diagram of a thermal management system according to another embodiment of the present application.
FIG. 8 is a block diagram of a thermal management system according to another embodiment of the present application.
Fig. 9 is a schematic diagram showing an example of a layout of a refrigerant flow channel plate in the thermal management system according to the present application.
Fig. 10 is a schematic diagram of another example of the layout of the refrigerant flow channel plate in the thermal management system according to the present application.
Fig. 11 is a schematic diagram showing still another example of the layout of the refrigerant flow channel plate in the thermal management system according to the present application.
Fig. 12 is a schematic diagram of another example of the layout of the refrigerant flow channel plate in the thermal management system according to the present application.
Fig. 13 is a schematic diagram showing an example of a layout of a coolant flow field plate in the thermal management system according to the present application.
Fig. 14 is a schematic diagram showing another example of the layout of the coolant flow field plates in the thermal management system according to the present application.
Fig. 15 is a schematic diagram showing still another example of the layout of the coolant flow field plates in the thermal management system according to the present application.
Fig. 16 is a schematic diagram showing an example of the arrangement relationship of the coolant flow field plate and the refrigerant flow field plate.
Detailed Description
The technical scheme of the application will be described below with reference to the accompanying drawings.
The thermal management system provided by the application is suitable for an energy storage system or a photovoltaic inversion system, in particular for a scene with larger scale of a battery cluster as a thermal management object, such as the energy storage system or the photovoltaic inversion system in a power station.
Fig. 1 is an example of a photovoltaic inverter system to which the thermal management system provided by the present application is applied. As shown in fig. 1, the photovoltaic inverter system includes a Photovoltaic (PV) panel that converts solar energy into electric energy and a photovoltaic inverter that is required to convert the direct current into alternating current to facilitate the transmission and utilization of electric power because the photovoltaic panel generates the direct current.
The photovoltaic inverter comprises a direct current-to-alternating current (direct current to alternating current, DC/AC) converter, and the DC/AC converter is used for converting direct current into alternating current.
The photovoltaic inverter also includes a maximum power point tracking (maximum power point tracking, MPPT) module. The MPPT module is used for tracking the highest voltage current value so that the power generation system outputs current with the maximum power.
The MPPT module and the DC/DC module in the photovoltaic inverter can be arranged in the same packaging device or in different packaging devices.
The MPPT module may include a direct current to direct current (direct current to direct g current, DC/DC) converter for stabilizing (or otherwise converting) the direct current generated by the PV assembly. The dc power after the voltage stabilization can be output to the power storage system. One end (denoted as an A end) of the DC/AC converter is connected with the MPPT module and an energy storage system, and the other end B is used for being connected with an alternating current power grid or an alternating current load, so that the DC/AC converter converts direct current output by the MPPT module or the energy storage system into alternating current and provides the alternating current to the alternating current load or the alternating current power grid.
In addition, the other end B (denoted as B-end) of the DC/AC converter may also be connected to another energy storage system via an inverter (i.e. DC/AC converter) for converting alternating current from the photovoltaic inverter into direct current and storing in the energy storage system. And, the direct current from the energy storage system may be converted to alternating current and provided to an alternating current load or an alternating current grid.
It should be noted that, in the photovoltaic inverter system provided by the application, only the energy storage system connected to the a end of the DC/AC converter in the photovoltaic inverter may be included, or only the energy storage system connected to the B end of the DC/AC converter in the photovoltaic inverter may be included, or both of the above energy storage systems may be included.
The photovoltaic inverter system may further include a thermal management system that cools some or all of the components in the battery clusters in the energy storage system, the DC/DC converters in the photovoltaic inverter, and the DC/AC converters by the cooling fluid, as described in more detail below.
Fig. 1 is an example of an energy storage system to which the thermal management system provided by the present application is applied. As shown in fig. 2, the energy storage system includes one or more DC/DC converters, one or more battery clusters, and one or more AC/DC converters. Also, although not shown, the energy storage system further includes one or more Battery MANAGEMENT SYSTEM (BMS). Each battery pack corresponds to one BMS. The BMS is generally used for realizing functions of dynamic monitoring of charge and discharge of the battery pack, balancing of the battery pack, evaluation of charge state of the battery pack, and the like.
When the energy storage system includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel. Wherein, a plurality of battery packs form a battery cluster. Wherein each battery PACK includes one or more battery PACKs (PACKs). In one implementation, each battery pack may further include a battery management unit (battery managemet unit, BMU), and the energy storage system further includes a battery control unit (batterycontrol unit, BCU). The BMS includes the BMU and the BCU. The BMU is used for monitoring information such as the voltage and the temperature of the PACK, reporting the information to the BCU, and the BCU monitors the PCK according to the information and generates a power control instruction for the PACK.
The PACK in the embodiment may be a single battery or may be a battery cluster composed of a plurality of batteries. Specifically, the storage battery can be one or a combination of a plurality of lead-carbon batteries, lithium iron phosphate batteries, ternary lithium batteries, sodium-sulfur batteries and flow batteries.
In the energy storage system, one end of the DC/DC converter is used for being connected with the photovoltaic panel, the other end of the DC/DC converter is connected with the battery cluster, and the DC/DC converter is used for performing power conversion processing such as voltage stabilization on direct current from the photovoltaic panel and outputting the direct current to the battery cluster. One end of the AC/DC converter is connected with the battery cluster, the other end of the AC/DC converter is connected with the alternating current power grid and/or the alternating current battery, and the AC/DC converter carries out conversion treatment on direct current from the battery to convert the direct current into alternating current and supply the alternating current to a load or a power grid.
In one possible implementation, although not shown, another DC/DC converter for performing power conversion processing such as boosting of direct current from the battery cluster may be further disposed between the AC/DC converter and the battery cluster.
The energy storage system may also include a thermal management system that cools some or all of the components in the battery clusters, the DC/DC converters, and the DC/AC converters in the energy storage system with a cooling fluid.
Next, the structure of the thermal management system of the present application will be described in detail with reference to fig. 3 to 7.
FIG. 3 illustrates a logical architecture diagram of an example of a thermal management system of the present application. As shown in fig. 3, the thermal management system includes a coolant circulation system, a refrigerant circulation system, and a heat exchange system.
The coolant circulation system uses a coolant, which may include water by way of example and not limitation, as a thermal management medium. And, in the case of thermal management of the battery, the coolant may be deionized to avoid conduction of the coolant. In addition, when the energy storage system or the photovoltaic inverter system is used in cold regions, an antifreezing agent may be added to the cooling liquid to prevent the cooling liquid from solidifying.
The refrigerant circulation system uses a refrigerant as a thermal management medium. The refrigerant (REFRIGERANT) may also be referred to as a refrigerant, or a snow species, and is a medium substance in various heat engines to accomplish energy conversion. These substances typically increase power in a reversible phase change (e.g., gas-liquid phase).
In the application, the refrigerant is used for transferring heat energy and generating a working fluid with a freezing effect. Alternatively, the refrigerant may transfer heat by evaporation and condensation. The refrigerant may be a substance that absorbs heat easily to become gas and releases heat easily to become liquid. For example, a refrigerant is an intermediate material in the cooling process, which receives the cooling energy of the refrigerant to cool down, and then cools down other cooled materials. By way of example and not limitation, in the present application, the refrigerant may include ammonia, air, water, brine, fluorochlorohydrocarbons (or fluorochlorocarbides), and the like. In the present application, the gaseous refrigerant is heated to a liquid when pressurized, and absorbs heat when the high-pressure liquid is depressurized to a gas.
As shown in fig. 3, the heat exchange system includes an evaporator. Although not shown, the evaporator includes a cooling liquid passage and a refrigerant passage, respectively. Thus, the cooling liquid and the refrigerant can exchange heat in the evaporator. In the present application, the evaporator is made of a material having high heat conductivity, such as metal, for facilitating heat exchange. As shown in fig. 3, the evaporator includes two refrigerant interfaces and two coolant interfaces, and 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 cooling liquid can enter the evaporator from one cooling liquid interface and be discharged from the other cooling liquid interface after heat exchange with the cooling medium.
The thermal management system of the application can comprise a refrigerating mode and a heating mode, and in the refrigerating mode, a refrigerant with low temperature and low pressure enters an evaporator to exchange heat with cooling liquid to cool the cooling liquid. That is, in the cooling mode, heat is transferred from the coolant to the refrigerant, which heats up and cools down. In the heating mode, the high-temperature and high-pressure refrigerant enters the evaporator to exchange heat with the cooling liquid, and the cooling liquid is heated. That is, in the heating mode, heat is transferred from the refrigerant to the cooling heat, the temperature of the cooling liquid increases, and the temperature of the refrigerant decreases.
By way of example and not limitation, the tubes in the evaporator through which the refrigerant and cooling fluid flow may be made of a material having good thermal conductivity, such as a metallic material (e.g., an alloy material such as iron, copper, or stainless steel).
Fig. 3 is a schematic diagram showing an example of the refrigerant circulation system. As shown in fig. 3, the refrigerant circulation system includes, but is not limited to, the following components:
A. Compressor with a compressor body having a rotor with a rotor shaft
The compressor includes an input port and an output port. The low temperature gaseous refrigerant may enter the compressor from the inlet. The compressor can compress the gaseous refrigerant to change the refrigerant from low-temperature gas state to high-temperature gas state. And outputting the compressed refrigerant from the output port.
A Compressor (Gas Compressor) is a machine that compresses Gas and simultaneously raises the pressure of the Gas. The compressors can be classified into positive-displacement compressors (positive-displacement) and gas-powered compressors (aerodynamic) according to their operation principle. The positive displacement compressor introduces gas into a closed space, and converts mechanical energy into pressure energy by compressing the volume of the space in which the original gas is dispersed to raise the internal pressure. According to the compression mode, the compression mode can be classified into reciprocating mode, rotary mode, scroll mode, spiral mode and the like. The aerodynamic compressor uses the high-speed rotation of the impeller to force the gas to flow at high speed to generate kinetic energy, and in the process of passing through the pressure increasing ring, the air flow speed is reduced due to the increase of the cross-sectional area, so that the kinetic energy of the gas is converted into pressure energy to increase the pressure. Currently, there are centrifugal type compressors, axial type compressors, and the like. According to the lubrication mode, the lubrication method can be divided into: an oilless air compressor and an engine oil lubrication air compressor. According to the performance, the method can be divided into: low noise, variable frequency, explosion prevention. According to the performance, the method can be divided into: fixed, mobile, closed.
In the present application, one compressor may be used, or a plurality of compressors may be used in parallel or in series, and the present application is not particularly limited.
B. condenser
The condenser comprises two interfaces. The refrigerant can enter the condenser from one interface and be output from the other interface. Or the refrigerant can also enter the condenser through another interface and be output from the interface. The condenser is used for cooling and condensing the refrigerant into a liquid refrigerant or a gas-liquid two-phase refrigerant. For example, the refrigerant may be heat-exchanged with the coolant, or the refrigerant may be heat-exchanged with the outside air. And, the condenser may further include a fan (not shown) for controlling the flow rate of the external air (or, controlling the cooling rate).
Among them, a condenser (also called an evaporator, a heat exchanger or a heat exchange device) is a device for transferring heat from a hot fluid to a cold fluid to meet a prescribed process requirement, and is an industrial application of convection heat transfer and heat transfer. A condenser is a device that condenses gaseous substances into a liquid state, and is a common heat exchanger that typically condenses substances by cooling. The material releases latent heat and partial sensible heat during the condensation process, so that the temperature of the refrigerant of the condenser is increased. That is, in the condenser, heat is transferred from the refrigerant to the air or the cooling liquid. By way of example and not limitation, the condenser may be disposed outdoors so that the refrigerant may exchange heat with the external environment, i.e., release heat or cold to the external environment. Or the condenser may be attached to a refrigerant flow plate described later.
In the present application, one condenser may be used, or a plurality of condensers connected in parallel or in series may be used.
As described above, the condenser can be regarded as belonging to the heat exchange system when the coolant is subjected to heat exchange with the refrigerant to condense the refrigerant
C. expansion valve
The expansion valve includes two ports. The refrigerant can enter the expansion valve from one interface and be output from the other interface. Alternatively, the refrigerant may enter the expansion valve through another port, and be output from the one port. The expansion valve may decompress (or release or throttle) the high-pressure refrigerant to obtain a low-temperature refrigerant.
The expansion valve may also be referred to as a thermal expansion valve or a throttle valve. The expansion valve is used for throttling the medium-temperature high-pressure liquid refrigerant into low-temperature low-pressure wet steam through the expansion valve, and then the refrigerant absorbs heat in the heat exchange plate to achieve the refrigerating effect.
In the application, the expansion valve consists of a valve body, a temperature sensing bulb and a balance pipe. The temperature sensing bag is filled with a refrigerant in a gas-liquid equilibrium saturation state, and the refrigerant is not communicated with the refrigerant in the system. It is generally tied to the outlet pipe of the evaporator and is in close contact with the pipe to sense the temperature of the superheated vapor at the outlet of the evaporator, and because the refrigerant in the evaporator is saturated, the pressure in the saturated state is transmitted to the valve body according to the temperature. One end of the balance pipe is connected to the evaporator outlet at a position slightly far away from the temperature sensing bulb and is directly connected with the valve body through a capillary tube. The function is to transmit the actual pressure at the evaporator outlet to the valve body. The valve body is internally provided with two diaphragms which move upwards under the action of pressure so as to reduce the flow of the refrigerant passing through the expansion valve and seek balance in the dynamic state.
The thermostatic expansion valve is installed at the evaporator inlet, commonly referred to as an expansion valve, and has two main functions:
1) Throttling action: the high-temperature and high-pressure liquid refrigerant is throttled by the throttle hole of the expansion valve to become a low-temperature and low-pressure vaporous hydraulic refrigerant, so that conditions are created for evaporation of the refrigerant;
2) Controlling the flow rate of the refrigerant: after the liquid refrigerant entering the evaporator passes through the evaporator, the refrigerant is evaporated from the liquid state to the gaseous state, absorbs heat and reduces the temperature of a management object (for example, a vehicle battery). The expansion valve controls the flow of the refrigerant, ensures that the outlet of the evaporator is completely gaseous refrigerant, and if the flow is too large, the outlet contains liquid refrigerant and possibly enters the compressor to generate liquid impact; if the flow of the refrigerant is too small, the refrigerant is evaporated in advance, and the refrigeration is insufficient.
In the application, the refrigerant circulation system further comprises a refrigerant flow channel plate, and a refrigerant channel for connecting each device or each port in the refrigerant circulation system is integrally arranged in the refrigerant flow channel plate.
Next, a flow path, a temperature change, and a gas phase change of the refrigerant in the refrigerant circulation system will be described in detail.
As shown in fig. 3, the compressor compresses a low-temperature low-pressure gaseous refrigerant, and the compressed high-temperature high-pressure gaseous refrigerant is discharged and flows into the condenser through a flow passage integrated in the refrigerant flow passage plate.
The high-temperature and high-pressure gaseous refrigerant exchanges heat with a low-temperature medium (such as air or cooling liquid in a cooling liquid circulation system) in the condenser, the low-temperature and high-pressure refrigerant (the gas phase state is liquid phase or gas-liquid phase) formed by heat exchange is discharged, and the low-temperature and high-pressure refrigerant flows into the expansion valve through a flow passage integrated in the refrigerant flow passage plate.
The low-temperature and high-pressure refrigerant releases pressure and releases heat in the expansion valve, and is converted into a low-temperature and low-pressure refrigerant (the gas phase state is liquid phase or gas-liquid phase). The low-temperature low-pressure refrigerant passes through a flow passage integrated in the refrigerant flow passage plate and a refrigerant inlet of the evaporator.
In the evaporator, the low-temperature low-pressure refrigerant exchanges heat (specifically, absorbs heat) with the high-temperature cooling liquid to form a high-temperature low-pressure refrigerant (the gas phase state is gas phase or gas-liquid two phases), and the high-temperature low-pressure refrigerant flows into the inlet of the compressor through the flow channel integrated in the refrigerant flow channel plate.
Thus, the thermal cycle process of the refrigerant is completed.
As described above, since the chemical substance as the refrigerant is generally corrosive and has a large temperature difference at the time of gas-liquid conversion, in the present application, various devices in the refrigerant cycle, for example, a refrigerant flow path plate, an expansion valve, and the like are manufactured using a material which is resistant to corrosion such as metal and is resistant to high and low temperatures.
It should be understood that the above-listed structure of the refrigerant circulation system is only exemplary, and the present application is not limited thereto, and for example, the refrigerant circulation system of the present application may further include a liquid storage tank and a gas-liquid separator as shown in fig. 8. The liquid storage tank is used for storing and replenishing the refrigerant to the refrigerant circulation system. The gas-liquid separator is used for preventing refrigerant from striking the compressor and ensuring the safe and normal operation of the compressor, and the working principle is that when the refrigerant with gas-liquid two phases enters the gas-liquid separator, the expansion speed is reduced, so that the liquid is separated or beaten on a baffle plate, and the liquid is separated.
Returning to fig. 3, the coolant circulation system includes a pump and a cold plate.
The pump is used to transfer mechanical or other external energy to the coolant to increase the coolant energy and thereby accelerate the flow rate and pressure of the coolant.
The cold plate is disposed adjacent to and is capable of heat transfer with a thermal management object (e.g., a battery cluster).
When a coolant is used as a medium for heat exchange with the refrigerant in the condensation plate, the coolant circulation system includes a coolant flow passage for communicating the pump with the coolant inlet of the condenser, and in the following, communication between two devices or ports is understood to mean that the two devices or ports communicate through the coolant passage, unless otherwise specified.
In the present application, the cooling liquid circulation system further includes a cooling liquid flow path plate in which cooling liquid passages for connecting the devices or ports are integrally provided.
Next, the flow path and temperature change of the coolant in the coolant circulation system will be described in detail.
The cooling liquid enters the evaporator under the action of the pump, is cooled after heat exchange with the low-temperature refrigerant, and the low-temperature cooling liquid enters the cold plate under the action of the pump, flows back to the evaporator after heat exchange with the battery cluster, and is cooled again. Thereby, the thermal cycle process of the coolant is completed.
As described above, since the coolant has low corrosiveness and a temperature change after heat exchange is small, in the present application, various devices in the coolant circulation, for example, a coolant flow field plate and the like are manufactured using a waterproof material such as plastic or rubber, which is low in cost.
It should be understood that the above-listed structures of the coolant circulation system are only exemplary, and the present application is not limited thereto, and for example, the coolant circulation system of the present application may also include a coolant tank and an expansion tank. The cooling liquid tank is used for supplementing cooling liquid to the cooling liquid circulation so as to supplement the loss caused by evaporation and the like of the cooling liquid. The expansion tank is used for controlling the pressure of the cooling liquid circulation system and avoiding the overlarge pressure. The stage expands in volume as the temperature of the coolant increases. When the cooling liquid expands to a certain degree, the pressure regulating valve in the expansion tank is opened to allow a part of the cooling liquid to flow out of the cooling liquid circulation system, so that the purpose of pressure release is achieved.
Fig. 3 illustrates the structure of a thermal management system in a use scenario for cooling a battery cluster. The function of the thermal management system of the present application is not limited thereto, and for example, when the energy storage system or the photovoltaic inverter system is applied to an environment having a low temperature, it is also necessary to heat the battery clusters. Fig. 4 shows a case where a heating source for the coolant is provided by the heater, and fig. 5 shows a case where a heating source for the coolant is provided by the refrigerant circulation system.
In the thermal management system shown in fig. 4, when the battery needs to be heated, the refrigerant circulation system can be closed, that is, the cooling liquid does not exchange heat with the refrigerant in the evaporator, and after being heated by the heater, the cooling liquid enters the cold plate under the action of the pump, so that heat is supplied to the battery through the cold plate.
As shown in fig. 5, when a heating source for the coolant is provided by the coolant circulation system, a four-way valve may be provided so that the coolant circulation system is switched between cooling and heating modes. As shown in fig. 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 input port of the compressor, the second port 12 communicates with the condenser, the third port 13 communicates with the output port of the compressor, and the fourth port communicates with the evaporator.
The four-way valve may also be referred to as a four-way reversing valve, which is a control valve having four ports (also referred to as ports or ports). By way of example and not limitation, in the present application, the four-way valve operates on the following principle: when the solenoid valve coil is in a power-off state, the pilot spool is driven by the right-side compression spring to move left, high-pressure gas enters the right-side piston cavity after entering the capillary tube, on the other hand, the gas in the left-side piston cavity is discharged, the piston and the main spool move left due to the pressure difference between the two ends of the piston, so that the second port 12 is communicated with the third port 13, the first port 11 is communicated with the fourth port 14, and the thermal management system is operated in a refrigeration mode. The temperature and gas phase transition of the refrigerant in the cooling mode are described above.
When the solenoid valve coil is in an electrified state, the pilot spool moves rightwards under the action of magnetic force generated by the solenoid valve coil to overcome the tension of the compression spring, high-pressure gas enters the capillary tube and then enters the left-end piston cavity, on the other hand, the gas in the right-end piston cavity is discharged, and the piston and the main spool move rightwards due to the pressure difference between the two ends of the piston, so that the third port 13 is communicated with the fourth port 14, and the first port 11 is communicated with the second port 12, so that the thermal management system works in a heating mode. In the heating mode, the high-temperature and high-pressure gaseous refrigerant flows into the third port 13 of the four-way valve from the output port of the compressor and enters the evaporator through the fourth port 14, and the high-temperature and high-pressure gaseous refrigerant exchanges heat with the cooling liquid in the evaporator, so that the temperature of the cooling liquid is increased. The refrigerant converted into low temperature and high pressure through heat exchange is released in the thermal expansion valve, converted into low temperature and low pressure refrigerant, further cooled by the condenser, converted into low temperature and low pressure refrigerant, and flows into the compressor through the second port 12 and the first port 11 of the four-way valve.
Due to seasonal variations, for example, in spring and autumn, the compressor may not be operated, thereby saving energy. In this case, the cooling of the coolant may be achieved by using the scheme shown in fig. 6 or fig. 7.
As shown in fig. 6, the coolant circulation system further includes a radiator and a three-way valve including a port 21, a port 22, and a port 23. Port 21 communicates with the evaporator, port 23 communicates with the radiator, and port 22 communicates with the pump.
When the refrigerant circulation system works, the port 21 and the port 22 of the three-way valve are communicated, and the port 23 is closed. At this time, the cooling liquid is cooled by the refrigerant, and the process is described above.
When the refrigerant circulation system stops working, the port 22 and the port 23 of the three-way valve are communicated, under the action of the pump, the temperature of the cooling liquid is raised after heat exchange between the cold plate and the battery cluster, and the temperature of the cooling liquid is lowered after heat exchange between the radiator and the external environment, and the cooled cooling liquid is sent into the cold plate again through the port 23 and the port 22 of the three-way valve. Further, the functions and connection relationships of other components of the thermal management system of fig. 6 are similar to those of the same components described in fig. 3 to 5 above, and detailed description thereof is omitted here.
As shown in fig. 7, the refrigerant circulation system further includes a fluorine pump and two bypass valves, one of which a is used to bypass the compressor and the other of which B is used to bypass the fluorine pump. When compressor operation is required, bypass valve B bypasses the fluorine pump and the compressor is operating normally, the cycle in this case being as described above. When the compressor is required to stop working, the bypass valve A enables the compressor to bypass, the fluorine pump is started, the temperature of the refrigerant is raised after heat exchange with the cooling liquid in the evaporator, the refrigerant after the temperature rise is directly cooled after heat exchange in the condenser, and the cooled refrigerant overcomes the pipe resistance and returns to the evaporator to continue heat exchange under the action of the fluorine pump, so that the energy-saving effect is achieved. Further, the functions and connection relationships of other components of the thermal management system of fig. 7 are similar to those of the same components described in fig. 3 to 5 above, and detailed description thereof is omitted here.
The thermal management system of the present application may also be used to cool the DC/DC converter or AC/DC converter described above, in addition to the battery clusters. In this case, the coolant circulation system further includes a multi-way valve. As shown in fig. 8, the port 1 of the multi-way valve communicates with the coolant inlet of the condensing plate, and although not shown, the coolant circulation system includes a coolant flow path for communicating the port 1 of the multi-way valve with the coolant inlet of the condenser. The cooling liquid outlet of the condenser is communicated with a port 2 of the multi-way valve. The port 3 of the multi-way valve is in communication with the cooling fluid inlet of the evaporator and the cooling fluid outlet of the evaporator is in communication with the port 4 of the multi-way valve. The port 4 of the multi-way valve is communicated with the inlet of the heater, the cooling liquid flowing out from the outlet of the heater can exchange heat with the battery cluster, the cooling liquid after heat exchange can flow into the inlet of the pump, and the outlet of the pump is communicated with the port 6 of the multi-way valve. The coolant flowing out of the port 8 of the multi-way valve can exchange heat with the AC/DC converter or the DC/DC converter, and the coolant after heat exchange can flow into the port of the multi-way valve. The port 10 of the multi-way valve communicates with the inlet of the radiator, the outlet of the radiator communicates with the inlet of the pump, and the outlet of the pump communicates with the port 9 of the multi-way valve.
The low-temperature cooling liquid flows out from a port 1 of the multi-way valve, passes through a runner integrated in the cooling liquid runner plate and enters a cooling liquid input port of the condenser. The low-temperature cooling liquid exchanges heat with the high-temperature refrigerant in the condenser and then heats up to form the high-temperature cooling liquid. The high-temperature cooling liquid flows out from a cooling liquid outlet of the condenser, passes through a runner integrated in the cooling liquid runner plate and enters the port 2 of the multi-way valve.
When it is necessary to heat the object to be thermally managed (for example, when the outside air temperature is low and it is necessary to heat the battery cluster), the multi-way valve 210 controls the port 2 to communicate with the port 5, the high-temperature coolant flows out from the port 5 of the multi-way valve 210, flows into the battery cluster by the pump 225, exchanges heat with the battery cluster, forms a low-temperature coolant, and flows into the port 6 of the multi-way valve 210 by the pump 225. In the case where the new cooling fluid circulation system includes the heater 240, the high-temperature cooling fluid may be further heated by the heater 240 before the high-temperature cooling fluid flows into the battery cluster. The through valve 210 can control the port 6 to communicate with the port 1, and further can exchange heat between the low-temperature coolant and the high-temperature coolant in the condensation plate exchanger 310 to form a high-temperature coolant.
The high-temperature cooling liquid flows out from a port 3 of the multi-way valve, passes through a runner integrated in the cooling liquid runner plate and enters a cooling liquid input port of the evaporator. The high-temperature cooling liquid exchanges heat with the low-temperature refrigerant in the evaporator and then is cooled to form the low-temperature cooling liquid.
The low-temperature cooling liquid flows out from a cooling liquid outlet of the evaporator, passes through a flow channel integrated in the cooling liquid flow channel plate and enters a port 4 of the multi-way valve.
When the battery cluster needs to be cooled, the multi-way valve controls the port 4 to be communicated with the port 5, low-temperature cooling liquid flows out from the port 5 of the multi-way valve, flows into the battery cluster under the action of the pump, exchanges heat with the battery cluster, and flows into the port 6 of the multi-way valve under the action of the pump after high-temperature cooling liquid is formed. The multi-way valve can control the port 6 to be communicated with the port 3, so that the high-temperature cooling liquid can exchange heat with the low-temperature refrigerant in the evaporator to form the low-temperature cooling liquid.
When the AC/DC converter or the DC/DC converter needs to be cooled, the multi-way valve controls the port 4 to be communicated with the port 8, low-temperature cooling liquid flows out from the port 8 of the multi-way valve, flows into the AC/DC converter or the DC/DC converter through a cooling liquid pipeline, exchanges heat with the AC/DC converter or the DC/DC converter, forms high-temperature cooling liquid, and flows into the port 7 of the multi-way valve. The multi-way valve can control the port 7 to communicate with the port 3, so that the high-temperature cooling liquid can exchange heat with the low-temperature refrigerant in the evaporator 320 to form the low-temperature cooling liquid.
The multi-way valve controls the port 4 to communicate with the port 10, and the low-temperature cooling liquid flows out from the port 10 of the multi-way valve under the action of the pump, flows into the radiator through the cooling liquid pipeline, exchanges heat with the external environment in the radiator, and flows into the port 9 of the multi-way valve after the low-temperature cooling liquid is formed. The multi-way valve can control the port 9 to be communicated with the port 1, so that heat exchange between the low-temperature cooling liquid condenser and the high-temperature refrigerant can be performed to form high-temperature cooling liquid. Thereby, the thermal cycle process of the coolant is completed.
It should be understood that the above-listed configurations of the coolant circulation system are merely exemplary, and the present application is not limited thereto, and for example, the coolant circulation system of the present application may not include a heater.
The components of the thermal management system of the present application will be described in detail below with reference to fig. 9-16. To reduce the difficulty of installation and maintenance, the various components or assemblies in the thermal management system of the present application are configured integrally.
The thermal management system comprises a refrigerant flow channel plate and a plurality of refrigerant end assemblies integrated on the refrigerant flow channel plate.
And, the thermal management system further includes a coolant flow field plate and a plurality of coolant end assemblies integrated on the coolant flow field plate.
In addition, a condenser and/or an evaporator are integrated on the refrigerant flow channel plate.
Fig. 9 is a schematic view showing an example of the refrigerant flow path plate, and as shown in fig. 9, the refrigerant flow path plate is formed in a plate shape extending along a first plane, which is a plane formed by the X axis and the Y axis shown in fig. 9. That is, the refrigerant flow passage plate is formed with two surfaces having a large area, one of which is referred to as an arrangement surface and the other of which is referred to as a mounting surface, and the arrangement surface is formed in a substantially planar shape as a whole, but it does not exclude that a portion having a partial concave-convex undulation is formed due to design and application requirements, that is, the arrangement surface of the refrigerant flow passage plate is formed in a shape substantially parallel to a first plane formed by an X axis and a Y axis as a whole.
When the thermal management system is used normally, the first plane is parallel to the gravity direction, that is, the direction of the Y axis may be understood as the height direction when the thermal management system is used normally, the Z axis direction shown in fig. 9 may be understood as the thickness direction when the thermal management system is used normally, and the X axis direction may be understood as the width direction when the thermal management system is used normally. 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.
The plurality of components of the refrigerant circulation system are disposed on the disposition plane of the refrigerant flow plate, and for example, when the thermal management system includes the structure shown in fig. 3, the compressor, the expansion valve, the evaporator and the condenser may be integrated on the refrigerant flow plate.
In one implementation, as shown in fig. 9, the refrigerant flow plate is provided with a compressor, an expansion valve, a condenser, and an evaporator. And the positions of the compressor, the expansion valve, the condenser and the evaporator on the refrigerant flow passage plate can be arbitrarily configured according to actual needs.
For example, as shown in fig. 9, in the Y-axis direction, the compressor is located below the expansion valve.
For another example, the heat exchange unit and the compressor constituted by the condenser and the evaporator may be arranged in a row in the X-axis direction.
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, and the present application is not particularly limited.
Also, in the X-axis direction, the expansion valve and the compressor are located on both sides of the condenser (or the evaporator).
Although not shown, at least one through hole penetrating the refrigerant retaining plate in the thickness direction of the refrigerant flow passage plate is provided in the refrigerant flow passage plate. The through hole is used for accommodating a condenser communication pipe for communicating the cooling liquid flow passage plate (specifically, a flow passage in the cooling liquid flow passage plate) with the condenser, and an evaporator communication pipe for communicating the cooling liquid flow passage plate with the evaporator.
For example, the through hole may be one, and in this case, both the condenser communication pipe and the evaporator communication pipe are accommodated in the one through hole. In this case, the evaporator and the condenser may be disposed close to each other, that is, a part of the through hole is covered with the evaporator and the other part of the through hole is covered with the condenser. In addition, the connection port for connecting the evaporator and the condenser to the pipe may be disposed in the region covering the through hole, and thus, the pipe can be easily accommodated in the through hole. In addition, the area of the through hole can be reduced, so that the processing complexity is reduced, and the strength of the refrigerant flow passage plate is improved.
For another example, the number of the through holes may be two, and in this case, the condenser communication pipe is accommodated in one through hole, and the evaporator communication pipe is accommodated in the other through hole. In addition, the connection port for connecting the evaporator and the condenser to the pipe may be disposed in the region covering the through hole, and thus, the pipe can be easily accommodated in the through hole. In this case, the positions of the through holes can be adjusted accordingly according to the positions of the evaporator and the condenser, thereby improving the flexibility of layout.
In another implementation, unlike the solution shown in fig. 9, as shown in fig. 10, the refrigerant flow plate is further configured with the above-mentioned liquid storage tank and gas-liquid separator, for example, the liquid storage tank and gas-liquid separator and the expansion valve may be configured in parallel in the X-axis direction. The liquid storage tank and the gas-liquid separator are positioned above the compressor in the Y-axis direction. In the X-axis direction, the liquid storage tank and the gas-liquid separator are located on the same side of the expansion valve.
In still another implementation, unlike the solutions shown in fig. 9 and 10, as shown in fig. 11, a four-way valve is further disposed on the refrigerant flow plate, for example, the four-way valve and the expansion valve may be disposed in parallel in the X-axis direction. The four-way valve is positioned above the condenser and the evaporator in the Y-axis direction. In addition, in the X-axis direction, the four-way valve and the expansion valve are positioned on the same side of the liquid storage tank.
In still another implementation, unlike the schemes shown in fig. 9 to 11, as shown in fig. 12, the number of compressors may be plural, for example, 2, and the plural compressors may be arranged in parallel in the X-axis direction.
In this case, the components integrated in the refrigerant flow path plate may be changed according to actual needs, for example, if the volume or mass of the device disposed in the refrigerant flow path plate shown in fig. 9 to 11 is large, the device may be disposed independently and may be connected to the refrigerant flow path plate (specifically, the refrigerant flow path in the refrigerant flow path plate) through a pipe.
The cooling liquid flow passage plate is formed in a plate shape extending along a first plane which is a plane formed by the X axis and the Y axis shown in fig. 13. That is, the coolant flow field plate is formed with two surfaces having a large area, one of which is referred to as an arrangement surface and the other of which is referred to as an installation surface, and the arrangement surface is formed in a substantially planar shape as a whole, but it does not exclude that a part having a partial concave-convex undulation is formed due to design and application requirements, that is, the arrangement surface of the coolant flow field plate is formed in a shape substantially parallel to a first plane formed by an X axis and a Y axis as a whole.
When the thermal management system is used normally, the first plane is parallel to the gravity direction, that is, the direction of the Y axis may be understood as the height direction when the thermal management system is used normally, the Z axis direction shown in fig. 13 may be understood as the thickness direction when the thermal management system is used normally, and the X axis direction may be understood as the width direction when the thermal management system is used normally. 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.
The plurality of components of the coolant circulation system are arranged on the arrangement plane of the coolant flow field plates, for example, the coolant tank and the pump described above are arranged on the arrangement plane of the coolant flow field plates when the thermal management system includes the structure shown in fig. 5.
In one implementation, as shown in FIG. 13, the coolant tank is located above the pump in the Y-axis direction. When the thermal management system provided by the application is normally used, the cooling liquid flow channel plate is arranged parallel to the gravity direction, and in this case, the cooling liquid tank is positioned above the pump, so that the cooling liquid can be supplied to the cooling liquid flow channel plate under the action of gravity.
In another implementation, unlike the solution shown in fig. 13, an expansion tank is further disposed on the coolant flow field plate as shown in fig. 14. The number of the expansion tanks may be one or a plurality of the expansion tanks, and the present application is not particularly limited. For example, as shown in fig. 14, the expansion tank and the coolant tank may be arranged in parallel in the X-axis direction.
In still another implementation, unlike the solution shown in fig. 13, a heater is further disposed on the coolant flow field plate as shown in fig. 14. For example, as shown in fig. 14, in the Y-axis direction, the heater is located between the coolant tank and the pump.
In addition, although fig. 14 shows the case where both the expansion tank and the heater are disposed on the coolant flow field plate, the present application is not limited to this, and only one of the expansion tank and the heater may be disposed on the coolant flow field plate. For example, the expansion tank and the coolant flow field plate may be disposed independently, and the expansion tank and the coolant flow field plate (specifically, the coolant flow field in the coolant flow field plate) may be connected by a pipe.
In still another implementation, unlike the solutions shown in fig. 13 and 14, as shown in fig. 15, a multi-way valve (e.g., the three-way valve described above) is further disposed on the coolant flow field plate. And, the multi-way valve is located below the coolant tank in the Y-axis direction. The pump is arranged in parallel with the multi-way valve in the X-axis direction.
It should be noted that, as described above, the components included in the coolant circulation system may be different according to actual demands, in which case, the components integrated on the coolant flow field plates may be changed according to actual demands, where devices not disposed on the coolant flow field plates in the coolant circulation system may be in communication with the coolant flow field plates (specifically, the coolant flow channels in the coolant flow field plates) through multiple pipes. And the number of the devices can be adjusted according to the requirements. The positions of the respective members on the coolant flow field plate may be changed as desired, and the present application is not particularly limited.
In addition, although not shown, an interface for outputting the cooling liquid to the cold plate and an interface for communicating with the radiator are also provided on the cooling liquid flow path plate.
In order to reduce the cost, the coolant flow field plates are usually made of nonmetallic materials, which is disadvantageous as a load-bearing part of the heat exchange system, so that, under one concept, the coolant flow field plates made of metal can be used as the load-bearing part of the heat exchange system, in which case, fixing members for fixing the heat management system can be installed at the side surfaces of the coolant flow field plates. Or the cooling liquid flow channel plate which is easy to process and low in cost can be used as a mounting substrate, a plurality of components in the cooling liquid circulation system and the cooling medium circulation system are mounted on the cooling liquid flow channel plate, and the bearing parts made of metal are independently configured, so that the size of the cooling liquid flow channel plate can be reduced, and the processing difficulty and cost of the cooling liquid flow channel plate are further reduced.
As shown in fig. 16, in the present application, the refrigerant flow field plate and the coolant flow field plate are stacked in the Z-axis direction, that is, the mounting surface of the coolant flow field plate is bonded to the mounting surface of the refrigerant flow field plate.
Although not shown, a through hole penetrating from the mounting surface to the disposition surface of the refrigerant flow passage plate is provided in the refrigerant flow passage plate, and a pipe for communicating the coolant flow passage in the coolant flow passage plate with the coolant inlet and outlet of the evaporator is accommodated in the through hole.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (13)

1. The heat management system is characterized by comprising a cooling liquid circulation system, a refrigerant circulation system and a heat exchange piece;
The cooling liquid circulation system comprises a cooling liquid flow passage plate and a plurality of cooling liquid end assemblies, wherein a cooling liquid flow passage is integrated in the cooling liquid flow passage plate and is communicated with the cooling liquid end assemblies, the cooling liquid circulation system comprises a cooling liquid flow passage plate and a plurality of cooling liquid end assemblies, a cooling liquid flow passage is integrated in the cooling liquid flow passage plate and is communicated with the cooling liquid end assemblies, the cooling liquid flow passage and the cooling liquid passage are communicated with the heat exchange piece, and the heat exchange piece is used for heat exchange of cooling liquid and cooling liquid;
The cooling liquid flow passage plate is fixedly attached to the cooling liquid flow passage plate, a plurality of cooling liquid end assemblies are mounted on one face, deviating from the cooling liquid flow passage plate, of the cooling liquid flow passage plate, and a plurality of cooling liquid end assemblies and heat exchange pieces are mounted on one face, deviating from the cooling liquid flow passage plate, of the cooling liquid flow passage plate.
2. The thermal management system of claim 1, wherein the plurality of coolant end assemblies comprise a coolant tank and a pump;
The coolant tank with the pump sets gradually along first direction, wherein, when the coolant flow channel board is placed in parallel with the gravity direction, first direction with the gravity direction is parallel, just the coolant tank is located the top of pump.
3. The thermal management system of claim 2, the plurality of coolant end assemblies further comprising an expansion tank, the expansion tank and the coolant tank being arranged side-by-side in a second direction, the second direction being perpendicular to the first direction and parallel to the coolant flow field plates.
4. The thermal management system of claim 1, wherein the refrigerant flow plate includes a mounting for mounting and securing the thermal management system.
5. The thermal management system of claim 4, wherein said mounting member is located on a side of said refrigerant flow field plate, said side being parallel to a thickness direction of said refrigerant flow field plate.
6. The thermal management system of claim 1, wherein said heat exchange member is mounted on a side of said refrigerant flow field plate facing away from said coolant flow field plate;
The refrigerant flow channel plate comprises at least one through hole penetrating through the thickness direction of the refrigerant flow channel plate, a pipeline is accommodated in the at least one through hole, and the pipeline is used for communicating the heat exchange piece and the flow channel in the cooling liquid flow channel plate.
7. The thermal management system of claim 6, wherein the number of through holes is one and a portion of the through holes are within a coverage area of a condenser on the refrigerant flow field plate and another portion of the through holes are within a coverage area of an evaporator on the refrigerant flow field plate.
8. The thermal management system of claim 6, wherein the number of through holes is two, and one through hole is within a coverage area of a condenser on the refrigerant flow field plate and the other through hole is within a coverage area of an evaporator on the refrigerant flow field plate.
9. The thermal management system of claim 1, wherein the plurality of coolant end assemblies further comprise a multi-way valve disposed sequentially in a first direction with the coolant tank, wherein the coolant tank is positioned above the multi-way valve when the coolant flow channel plate is positioned parallel to a direction of gravity.
10. The thermal management system of claim 1, wherein the plurality of coolant end assemblies further comprise a heater disposed sequentially in a first direction with the coolant tank, wherein the coolant tank is above the heater when the coolant flow field plate is placed parallel to a direction of gravity.
11. The thermal management system of any one of claims 1 to 10, wherein the plurality of refrigerant side assemblies comprise at least one of: compressor, expansion valve, fluorine pump, liquid storage pot, four-way valve or gas-liquid separator.
12. An energy storage system, comprising: a battery cluster and a thermal management system according to any one of claims 1 to 11 that uses a cooling fluid to exchange heat with the battery cluster.
13. A photovoltaic inverter system, comprising: a photovoltaic panel for converting solar energy into electrical energy, a photovoltaic inverter for converting direct current from the photovoltaic panel into alternating current, an energy storage system comprising a cluster of cells for storing electrical energy from the photovoltaic panel, and a thermal management system according to any one of claims 1 to 11 using a cooling fluid in heat exchange with the cluster of cells in the energy storage system and/or the power converter in the photovoltaic inverter.
CN202322385242.4U 2023-08-30 2023-08-30 Thermal management system, energy storage system and photovoltaic inversion system Active CN221178225U (en)

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