Battery thermal management system and method, electric equipment and energy storage equipment

Abstract

The invention relates to the technical field related to batteries, and discloses a battery heat management system and method, electric equipment and energy storage equipment. The battery heat management system comprises a compressor, a heat exchange assembly, a first refrigerant flow path, a second refrigerant flow path, a third refrigerant flow path, a fourth refrigerant flow path, a condenser, an evaporator, a first control valve group and a second control valve group; the first refrigerant flow path and the second refrigerant flow path communicate with a refrigerant inlet of the heat exchange assembly and a refrigerant outlet of the compressor, the third refrigerant flow path and the fourth refrigerant flow path communicate with a refrigerant outlet of the heat exchange assembly and a refrigerant inlet of the compressor, the condenser is arranged on the first refrigerant flow path, and the evaporator is arranged on the fourth refrigerant flow path. The first control valve group is suitable for selectively conducting one of the first refrigerant flow path and the second refrigerant flow path, the second control valve group is suitable for selectively conducting one of the third refrigerant flow path and the fourth refrigerant flow path, the heat exchange assembly can heat the battery and can also cool the battery, and the temperature regulation and control capacity of the battery is improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular, to a battery thermal management system and method, an electrical equipment, and an energy storage device. Background Art

[0002] The information provided in this part is only background information related to the present application, and it is not necessarily prior art.

[0003] A battery can store electrical energy and can be applied to electrical equipment, such as in a vehicle, as a power source; it can also be applied to an energy storage device, such as in a power storage station, to store electrical energy for subsequent use by electrical equipment. Temperature has a great influence on the performance of the battery. Too low temperature will reduce the battery activity and may even lead to inability to charge or discharge, while too high temperature poses a risk of thermal runaway. How to improve the temperature control ability of the battery has always been a continuously concerned issue in the development of batteries. Summary of the Invention

[0004] In view of the above problems, the present application provides a battery thermal management system and method, an electrical equipment, and an energy storage device, so as to improve the temperature control ability of the battery by heating or cooling the battery.

[0005] A first aspect of the present application provides a battery thermal management system, including a compressor, a heat exchange component, a first refrigerant flow path, a second refrigerant flow path, a third refrigerant flow path, a fourth refrigerant flow path, a condenser, an evaporator, a first control valve group, and a second control valve group. The heat exchange component is used for heat exchange with the battery; the first refrigerant flow path connects the refrigerant inlet of the heat exchange component to the refrigerant outlet of the compressor, the second refrigerant flow path connects the refrigerant inlet of the heat exchange component to the refrigerant outlet of the compressor, the third refrigerant flow path connects the refrigerant outlet of the heat exchange component to the refrigerant inlet of the compressor, the fourth refrigerant flow path connects the refrigerant outlet of the heat exchange component to the refrigerant inlet of the compressor, the condenser is arranged on the first refrigerant flow path, and the evaporator is arranged on the fourth refrigerant flow path; the first control valve group is connected to the first refrigerant flow path and the second refrigerant flow path and is adapted to selectively conduct one of the first refrigerant flow path and the second refrigerant flow path; the second control valve group is connected to the third refrigerant flow path and the fourth refrigerant flow path, and the second control valve group is adapted to selectively conduct one of the third refrigerant flow path and the fourth refrigerant flow path.

[0006] In the technical solution of the embodiment of the present application, through the control of the first control valve group on the first refrigerant flow path and the second refrigerant flow path, and the control of the second control valve group on the third refrigerant flow path and the fourth refrigerant flow path, the battery thermal management system can not only heat the battery but also cool the battery, improving the temperature regulation ability of the battery. Among them, when the battery needs to be heated, the first control valve group is controlled to conduct the second refrigerant flow path, and the second control valve group is controlled to conduct the fourth refrigerant flow path. At this time, the refrigerant flowing out of the compressor flows into the heat exchange component through the second refrigerant flow path. The refrigerant exchanges heat with the battery in the heat exchange component, causing the battery to warm up. The refrigerant flowing out of the heat exchange component flows to the evaporator. After the refrigerant evaporates and absorbs heat in the evaporator, it flows to the compressor, forming a heating cycle loop. When the battery needs to be cooled, the second control valve group is controlled to conduct the first refrigerant flow path, and the second control valve group is controlled to conduct the third refrigerant flow path. At this time, the refrigerant flowing out of the compressor flows to the heat exchange component after being cooled by the condenser. The refrigerant exchanges heat with the battery in the heat exchange component, causing the battery to cool down. The refrigerant flowing out of the heat exchange component flows to the compressor through the third refrigerant circuit, forming a refrigeration cycle loop.

[0007] In some embodiments of the present application, the first refrigerant flow path includes a first sub-flow path and a second sub-flow path. The first sub-flow path is connected between the refrigerant outlet of the compressor and the refrigerant inlet of the condenser. The second sub-flow path is connected between the refrigerant outlet of the condenser and the refrigerant inlet of the heat exchange component. The battery thermal management system further includes a fifth refrigerant flow path and a third control valve group. The refrigerant inlet of the fifth refrigerant flow path is communicated with the second sub-flow path. The refrigerant outlet of the fifth refrigerant flow path is connected to the refrigerant inlet of the evaporator. The third control valve group is arranged on the fifth refrigerant flow path and is adapted to control the fifth refrigerant flow path to be conducted or disconnected. When the fifth refrigerant flow path is opened, in addition to flowing to the heat exchange component, a part of the refrigerant flowing out of the condenser will be diverted into the fifth refrigerant flow path and return to the refrigerant inlet of the compressor after passing through the evaporator. In this working condition, the evaporator can divert the refrigerant, reducing the refrigeration capacity of the heat exchange component. It can be applied to the working condition with a lower battery heat dissipation demand, increasing the adjustable range of the refrigeration capacity of the heat exchange component, which is beneficial to improving the temperature regulation ability of the battery.

[0008] In some embodiments of the present application, a first expansion valve is further arranged on the second sub-flow path. The inlet of the fifth refrigerant flow path is arranged between the first expansion valve and the condenser. A part of the refrigerant flowing out of the condenser flows to the heat exchange component after passing through the first expansion valve, which can improve the operating stability of the battery thermal management system. At the same time, since the pressure of the refrigerant in the first expansion valve is usually greater than the pressure of the refrigerant after the first expansion valve, arranging the fifth refrigerant flow path before the first expansion valve is beneficial for the refrigerant to be smoothly diverted and flow into the fifth refrigerant flow path.

[0009] In some embodiments of the present application, the battery thermal management system further includes a subcooler. The subcooler is connected to the second sub-flow path and is located between the condenser and the first expansion valve, and / or the subcooler is connected to the second refrigerant flow path. Under the refrigeration condition, the subcooler can further cool the refrigerant flowing out of the condenser to the subcooled liquid state first. In this way, when the refrigerant flows into the heat exchange component, it can have a higher heat exchange efficiency, improving the cooling effect of the heat exchange component on the battery. Under the heating condition, the subcooler can cool the refrigerant flowing out of the compressor, so that the refrigerant in the superheated gas state can be partially or completely converted into the refrigerant in the saturated gas state. In this way, when the refrigerant enters the heat exchange component, in the heat exchange component, the refrigerant can utilize the phase change latent heat for heat exchange more, and the temperature change of the refrigerant before and after heat exchange is smaller, making the temperature change of the heat exchange component smaller, and further making the temperature change of the battery connected to the heat exchange component smaller.

[0010] In some embodiments of the present application, the second refrigerant flow path includes a third sub-flow path and a fourth sub-flow path. The third sub-flow path is connected between the refrigerant outlet of the compressor and the refrigerant inlet of the subcooler, and the fourth sub-flow path is connected between the refrigerant outlet of the subcooler and the refrigerant inlet of the heat exchange component; the second sub-flow path includes a first pipe section and a second pipe section. The second pipe section is connected between the refrigerant outlet of the condenser and the refrigerant inlet of the subcooler, and the first pipe section is connected between the refrigerant outlet of the subcooler and the refrigerant inlet of the first expansion valve; the first control valve group is connected to the first sub-flow path and the third sub-flow path to communicate, and is used to control the alternative communication of the first sub-flow path and the third sub-flow path. The battery thermal management system further includes a fourth control valve group. The fourth control valve group is connected to the first pipe section and the fourth sub-flow path, and is adapted to make the fourth sub-flow path and the first pipe section communicate alternatively. In this embodiment, a set of condensers can be shared under the refrigeration condition and the heating condition, with lower equipment costs and less occupied space.

[0011] In some embodiments of the present application, the first control valve group includes a first valve member disposed on the first sub-flow path and a second valve member disposed on the third sub-flow path; and / or, the second control valve group includes a third valve member disposed on the third refrigerant flow path and a fourth valve member disposed on the fourth refrigerant flow path; and / or, the fourth control valve group includes a fifth valve member disposed on the first pipe section and a sixth valve member disposed on the fourth sub-flow path. By directly controlling the on / off of the corresponding flow paths through each valve member, the operation is convenient and the control logic is simple.

[0012] In some embodiments of the present application, the battery thermal management system further includes a second expansion valve. The second expansion valve is disposed on the fourth refrigerant flow path and is located between the refrigerant outlet of the heat exchange component and the refrigerant inlet of the evaporator. The refrigerant outlet of the fifth refrigerant flow path is communicated with the refrigerant inlet of the second expansion valve. Before flowing into the evaporator, the refrigerant first passes through the second expansion valve, which can improve the operating stability of the battery thermal management system. At the same time, the refrigerant from the fifth refrigerant flow path and the refrigerant of the heat exchange component can share a set of second expansion valves, with relatively low equipment input costs and a more concise component layout.

[0013] In some embodiments of the present application, the battery thermal management system further includes a first detection component. The refrigerant inlet and / or refrigerant outlet of the heat exchange component is communicated with the first detection component. The first detection component is adapted to detect the refrigerant flow rate flowing through the heat exchange component. By providing the first detection component, the refrigerant flow rate flowing through the heat exchange component can be detected, and the heat exchange capacity of the heat exchange component can be predicted based on the refrigerant flow rate, which is beneficial to controlling the temperature regulation of the battery.

[0014] In some embodiments of the present application, the first detection component is communicated with the first refrigerant flow path and the fourth refrigerant flow path. Connecting the first detection component to the first refrigerant flow path and the fourth refrigerant flow path allows for sharing a set of first detection components under both refrigeration and heating conditions, resulting in lower equipment costs and a more concise component layout. At the same time, the temperature of the refrigerant flowing from the first refrigerant flow path into the heat exchange component and the refrigerant flowing from the heat exchange component to the fourth refrigerant flow path is relatively low, and the content of the refrigerant in the liquid state is relatively high, enabling more accurate flow rate detection.

[0015] In some embodiments of the present application, the battery thermal management system further includes a second detection component and a third detection component. The second detection component is disposed at the refrigerant inlet of the heat exchange component, and the third detection component is disposed at the refrigerant outlet of the heat exchange component. The second detection component and the third detection component are respectively adapted to detect the refrigerant pressure at the refrigerant inlet and refrigerant outlet of the heat exchange component, and / or the second detection component and the third detection component are respectively adapted to detect the refrigerant temperature at the refrigerant inlet and refrigerant outlet of the heat exchange component. By detecting the refrigerant temperature and refrigerant pressure at the refrigerant inlet of the heat exchange component, the heat exchange capacity of the heat exchange component can be assisted in being known, which is beneficial to controlling the temperature regulation of the battery. Moreover, when the first detection component, the second detection component, and the third detection component are provided simultaneously, the enthalpy change of the refrigerant can be inferred based on the refrigerant temperature and refrigerant pressure before and after the heat exchange component, and combined with the refrigerant flow rate flowing through the heat exchange component, the heat exchange capacity of the heat exchange component can be calculated more accurately. Thus, the heat exchange capacity of the heat exchange component can be tested, and the heat exchange component can be controlled more precisely based on the heat exchange capacity of the heat exchange component, thereby improving the accuracy of battery temperature regulation.

[0016] In some embodiments of the present application, the battery thermal management system further includes a flow regulation component. The refrigerant inlet of the compressor is provided with the flow regulation component, and the flow regulation component is adapted to regulate the refrigerant flow rate flowing through the compressor. By providing the flow regulation component, the heat exchange regulation ability of the battery thermal management system can be increased, so that the battery thermal management system can adapt to various heat exchange power requirements.

[0017] In some embodiments of the present application, the flow regulation component includes a throttle valve.

[0018] In some embodiments of the present application, the evaporator includes a refrigerant flow channel and a medium flow channel that exchange heat with each other. The refrigerant flow channel is communicated with the refrigerant inlet and the refrigerant outlet of the evaporator; the battery thermal management system further includes a medium supply device, and the medium supply device includes a heating device, a first medium pipeline, a second medium pipeline, and a medium driving component. The heating device is adapted to heat the medium flowing through the heating device. The medium inlet of the heating device is connected to the medium outlet of the medium flow channel through the first medium pipeline, and the medium outlet of the heating device is connected to the medium inlet of the medium flow channel through the second medium pipeline. The medium driving component is used to drive the medium to flow, and the medium driving component is provided on the first medium pipeline and / or the second medium pipeline. By providing the medium supply component, heat exchange can be carried out between a medium such as water and the refrigerant, improving the heat exchange effect of the evaporator.

[0019] In some embodiments of the present application, the heat exchange component includes a direct cooling and direct heating plate.

[0020] A second aspect of the present application provides a battery thermal management method, which is applied to the battery thermal management system proposed in the present application or any embodiment of the present application. According to the battery being in a working condition that requires cooling, the first refrigerant flow path and the third refrigerant flow path are controlled to be conducted, and the second refrigerant flow path and the fourth refrigerant flow path are closed; according to the battery being in a working condition that requires heating, the second refrigerant flow path and the fourth refrigerant flow path are controlled to be conducted, and the first refrigerant flow path and the third refrigerant flow path are closed.

[0021] In this embodiment of the battery thermal management method, by controlling the first refrigerant flow path and the second refrigerant flow path, and controlling the third refrigerant flow path and the fourth refrigerant flow path, the battery thermal management system can both heat the battery and cool the battery, improving the temperature regulation ability of the battery.

[0022] In some embodiments of the present application, the battery thermal management system further includes a fifth refrigerant flow path, and the battery thermal management method further includes: controlling the fifth refrigerant flow path to be turned on or off according to the required battery cooling amount. When the battery thermal management system is in the refrigeration working condition, by controlling the fifth refrigerant flow path to be turned on or off, the cooling capacity of the heat exchange component can be adjusted, so that the battery can be cooled according to the required battery cooling amount, and the cooling capacity of the heat exchange component can be adaptively allocated, improving the adaptability of the battery temperature control.

[0023] In some embodiments of the present application, when the required battery cooling amount is less than the first reference cooling amount, the fifth refrigerant flow path is controlled to be turned on. The first reference cooling amount is the first preset cooling amount, or the first reference cooling amount is the maximum cooling output of the heat exchange component when the compressor is in the minimum operating frequency state; when the required battery cooling amount is greater than or equal to the first reference cooling amount, the fifth refrigerant flow path is controlled to be turned off.

[0024] In some embodiments of the present application, the battery thermal management system further includes a medium supply device, and the battery thermal management method further includes: regulating the refrigerant flow rate flowing in the battery thermal management system, the power of the compressor, and / or the heat exchange capacity of the medium of the medium supply device according to the required battery cooling amount or the required battery heating amount, so that the output of the heat exchange component is reduced or increased. In this embodiment, the required battery cooling amount or the required battery heating amount can be compared with the heat exchange capacity of the heat exchange component of the current battery thermal management system, and the heat exchange capacity of the battery thermal management system can be regulated, improving the battery temperature control ability of the battery thermal management system, enabling the battery to be maintained within a more appropriate temperature range, which is more friendly to maintaining battery performance.

[0025] In some embodiments of the present application, regulating the refrigerant flow rate flowing in the battery thermal management system, the power of the compressor, and / or the heat exchange capacity of the medium of the medium supply device includes: when the required battery cooling amount is greater than or equal to the second reference cooling amount, controlling the compressor to operate within a first power range. The second reference cooling amount is greater than the first reference cooling amount, and the second reference cooling amount is the second preset cooling amount, or the second reference cooling amount is the maximum cooling output of the heat exchange component; when the required battery cooling amount is less than the second reference cooling amount, controlling the compressor to operate within a second power range, and the minimum value of the first power range is greater than or equal to the maximum value of the second power range. In this embodiment, by regulating the power of the compressor, the heat exchange capacity of the battery thermal management system in the refrigeration working condition can be regulated, improving the battery temperature control ability of the battery thermal management system, enabling the battery to be maintained within a more appropriate temperature range, which is more friendly to maintaining battery performance.

[0026] In some embodiments of the present application, regulating the refrigerant flow rate flowing in the battery thermal management system, the power of the compressor, and / or the heat exchange capacity of the medium of the medium supply device further includes: when the battery required cooling amount is greater than or equal to the third reference cooling amount, the refrigerant flowing in the battery thermal management system flows at a first flow rate, the first reference cooling amount is greater than the third reference cooling amount, the third reference cooling amount is a third preset cooling amount, or the third reference cooling amount is the maximum cooling output of the heat exchange component when the compressor is at the minimum operating frequency and the heat exchange capacity of the medium of the medium supply device is in the maximum state; when the battery required cooling amount is less than the third reference cooling amount, the refrigerant flowing in the battery thermal management system flows at a second flow rate, and the second flow rate is less than the first flow rate. In this embodiment, by regulating the refrigerant flow rate flowing in the battery thermal management system, the heat exchange capacity of the battery thermal management system under the refrigeration working condition can be regulated, the temperature regulation ability of the battery thermal management system for the battery is improved, so that the battery can be maintained within a relatively appropriate temperature range, which is more friendly to maintaining the battery performance.

[0027] In some embodiments of the present application, when the battery required heating amount is greater than or equal to the first reference heating amount, control the compressor to operate within a third power range, the first reference heating amount is a first preset heating amount, or the first reference heating amount is the maximum heating output of the heat exchange component; when the battery required heating amount is less than the first reference heating amount, control the compressor to operate within a fourth power range, and the minimum value of the third power range is greater than or equal to the maximum value of the fourth power range. In this embodiment, by regulating the power of the compressor, the heat exchange capacity of the battery thermal management system under the heating working condition can be regulated, the temperature regulation ability of the battery thermal management system for the battery is improved, so that the battery can be maintained within a relatively appropriate temperature range, which is more friendly to maintaining the battery performance.

[0028] In some embodiments of the present application, the battery thermal management system further includes a medium supply device, and the battery thermal management method further includes: when the required heating amount of the battery is greater than or equal to a second reference heating amount, controlling the medium of the medium supply device to flow at a first flow rate and / or the heating device to operate at a first heating power, where the second reference heating amount is less than the first reference heating amount, the second reference heating amount is a second preset heating amount, or the first reference heating amount is the maximum heating output of the heat exchange component when the compressor is in the state of minimum operating frequency; when the required heating amount of the battery is less than the second reference heating amount, controlling the medium of the medium supply device to flow at a second flow rate, and / or the heating device to operate at a second heating power, where the second flow rate is less than the first flow rate and the second heating power is less than the first heating power. In this embodiment, by regulating the heat exchange capacity of the medium of the supply device, the heat exchange capacity of the battery thermal management system under the heating industrial control can be regulated, improving the temperature regulation ability of the battery thermal management system for the battery, enabling the battery to be maintained within a more appropriate temperature range, which is more friendly to maintaining the battery performance.

[0029] In some embodiments of the present application, the battery thermal management method further includes: when the required heating amount of the battery is greater than or equal to a third reference heating amount, controlling the refrigerant flowing in the battery thermal management system to flow at a third flow rate, where the third reference heating amount is less than the second reference heating amount, the third reference heating amount is a third preset heating amount, or the third reference heating amount is the maximum heating output of the heat exchange component when the compressor is in the state of minimum operating frequency and the heat exchange capacity of the medium of the medium supply device is at the minimum; when the required heating amount of the battery is less than the third reference heating amount, controlling the refrigerant flowing in the battery thermal management system to flow at a fourth flow rate, where the fourth flow rate is less than the third flow rate. In this embodiment, by regulating the flow rate of the refrigerant flowing in the battery thermal management system, the heat exchange capacity of the battery thermal management system under the heating condition can be regulated, improving the temperature regulation ability of the battery thermal management system for the battery, enabling the battery to be maintained within a more appropriate temperature range, which is more friendly to maintaining the battery performance.

[0030] A third aspect of the present application provides an electrical device including a battery and the battery thermal management system provided in the present application or any embodiment thereof, where the battery is connected to the heat exchange component.

[0031] A fourth aspect of the present application provides an energy storage device including a battery and the battery thermal management system provided in the present application or any embodiment thereof, where the battery is connected to the heat exchange component.

[0032] The above description is only an overview of the technical solution of the present application. In order to better understand the technical means of the present application, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specific embodiments of the present application are specifically given. Description of the Drawings

[0033] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0034] Figure 1 Schematically shows a schematic diagram of an energy storage device according to some embodiments of the present application;

[0035] Figure 2 Schematically shows a schematic diagram of a battery thermal management system according to some embodiments of the present application;

[0036] Figure 3 Schematically shows a schematic diagram of a battery thermal management system according to some embodiments of the present application;

[0037] Figure 4 Schematically shows a schematic diagram of a battery thermal management system according to some embodiments of the present application;

[0038] Figure 5 Schematically shows a schematic diagram of a battery thermal management system according to some embodiments of the present application;

[0039] Figure 6 Schematically shows a schematic diagram of a battery thermal management system according to some embodiments of the present application;

[0040] Figure 7 Schematically shows Figure 6 the operating schematic diagram of the battery thermal management system for cooling the battery;

[0041] Figure 8 Schematically shows Figure 6 the operating schematic diagram of the battery thermal management system for heating the battery;

[0042] Figure 9 Schematically shows the flowchart of a battery thermal management method according to some embodiments of the present application;

[0043] Figure 10 Schematically shows the flowchart of a battery thermal management method according to some embodiments of the present application;

[0044] Figure 11Schematically shows a flowchart of the battery thermal management method according to some embodiments of the present application when the battery is in a working condition that requires temperature reduction;

[0045] Figure 12 Schematically shows a flowchart of the battery thermal management method according to some embodiments of the present application when the battery is in a working condition that requires temperature reduction;

[0046] Figure 13 Schematically shows a flowchart of the battery thermal management method according to some embodiments of the present application when the battery is in a working condition that requires temperature increase;

[0047] Figure 14 Schematically shows a flowchart of the battery thermal management method according to some embodiments of the present application when the battery is in a working condition that requires temperature increase.

[0048] The reference numerals in the specific embodiments are as follows:

[0049] 10. Energy storage device; 11. Support frame; 12. Battery;

[0050] 100. Compressor; 101. First main flow path; 102. Second main flow path;

[0051] 200. Heat exchange component; 201. Third main flow path; 202. Fourth main flow path; 210. Direct cooling and direct heating plate;

[0052] 310. First refrigerant flow path; 311. First sub-flow path; 312. Second sub-flow path; 313. First pipe section; 314. Second pipe section; 320. Second refrigerant flow path; 321. Third sub-flow path; 322. Fourth sub-flow path; 330. Third refrigerant flow path; 340. Fourth refrigerant flow path; 341. Fifth sub-flow path; 342. Sixth sub-flow path; 350. Fifth refrigerant flow path; 361. First check valve; 362. Second check valve; 363. Third check valve; 364. Fourth check valve;

[0053] 410. First expansion valve; 420. Second expansion valve;

[0054] 500. Subcooler;

[0055] 610. First detection component; 620. Second detection component; 630. Third detection component; 640. Flow rate adjustment component; 641. Throttle valve;

[0056] 700. Condenser; 710. Liquid receiver; 720. Gas-liquid separator;

[0057] 800. Evaporator; 810. Medium supply device; 811. Heating device; 8111. Medium storage container; 8112. Heating component; 812. First medium pipeline; 813. Second medium pipeline; 814. Medium driving component;

[0058] 910, the first control valve group; 911, the first valve member; 912, the second valve member; 920, the second control valve group; 921, the third valve member; 922, the fourth valve member; 930, the third control valve group; 940, the fourth control valve group; 941, the fifth valve member; 942, the sixth valve member; 950, the stop valve. Detailed implementation manners

[0059] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description of the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0061] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "a plurality" is more than two, unless otherwise specifically defined.

[0062] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0063] In the description of the embodiments of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0064] In the description of the embodiments of this application, the term "a plurality" refers to more than two (including two). Similarly, "a plurality of groups" refers to more than two groups (including two groups), and "a plurality of pieces" refers to more than two pieces (including two pieces).

[0065] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the embodiments of the present application.

[0066] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0067] A rechargeable battery can be referred to as a secondary battery or a power battery. The rechargeable battery can be a lithium battery, for example, a lithium-sulfur battery, a sodium-ion lithium battery, or a magnesium-ion battery, etc. For the convenience of description, the rechargeable battery can be collectively referred to as a battery in this article.

[0068] Temperature has a great influence on the performance of the battery. Too low a temperature will reduce the battery activity and may cause inability to charge and discharge. Too high a temperature poses a risk of thermal runaway. In some technologies, in the energy storage device using the battery, a cooling system is set up to cool the battery to adjust the temperature of the battery.

[0069] It is found in actual applications that the environment where the energy storage device is located is relatively complex, and it may occur that the outside temperature is low, resulting in too low a temperature of the battery. The cooling system cannot adjust the too low temperature of the battery. If an additional heating system is set up, it will not only occupy the space of the energy storage device, have a great impact on the energy storage density of the energy storage device, but also increase more cost investment.

[0070] Based on the above considerations, the present application provides a battery thermal management system and method. A first refrigerant flow path and a second refrigerant flow path are provided between the refrigerant inlet of the compressor of the battery thermal management system and the heat exchange component, and a third refrigerant flow path and a fourth refrigerant flow path are provided between the heat exchange component and the refrigerant inlet of the compressor. A condenser is provided on the first refrigerant flow path, and an evaporator is provided on the fourth refrigerant flow path. The first refrigerant flow path and the second refrigerant flow path are connected to a first control valve group capable of controlling the selective conduction of the two, and the third refrigerant flow path and the fourth refrigerant flow path are connected to a second control valve group capable of controlling the selective conduction of the two.

[0071] Among them, the heat exchange component is used to exchange heat with the battery. When the battery needs to be heated, the first control valve group is controlled to make the second refrigerant flow path conductive, and the second control valve group is controlled to make the fourth refrigerant flow path conductive. At this time, the refrigerant flowing out of the compressor flows into the heat exchange component through the second refrigerant flow path. The refrigerant exchanges heat with the battery in the heat exchange component to raise the temperature of the battery. The refrigerant flowing out of the heat exchange component flows to the evaporator, and after evaporating and absorbing heat in the evaporator, it flows to the compressor, forming a heating cycle circuit. When the battery needs to be cooled, the second control valve group is controlled to make the first refrigerant flow path conductive, and the second control valve group is controlled to make the third refrigerant flow path conductive. At this time, the refrigerant flowing out of the compressor flows to the heat exchange component after being cooled by the condenser. The refrigerant exchanges heat with the battery in the heat exchange component to cool the battery. The refrigerant flowing out of the heat exchange component flows to the compressor through the third refrigerant circuit, forming a refrigeration cycle circuit.

[0072] In such a battery thermal management system, by switching the first control valve group and the second control valve group, the heat exchange component can both heat and cool the battery, improving the temperature control ability of the battery. At the same time, when heating and cooling the battery, the battery thermal management system can use the same set of systems, occupying less space and having a lower cost.

[0073] The battery thermal management system and method proposed in the embodiments of the present application can be used for testing the refrigeration and heating capabilities of the battery thermal management system to verify the temperature regulation ability of the battery thermal management system and improve the reliability of the battery thermal management system.

[0074] The battery thermal management system and method proposed in the embodiments of the present application can also be used in electrical equipment or energy storage equipment.

[0075] Among them, the electrical equipment may but is not limited to electric vehicles, electric trains, electric bicycles, golf carts, drones or ships, etc. Moreover, the electrical equipment may be a device powered only by a battery or a hybrid device. The battery provides electrical energy for the electrical equipment and drives the electric device to move forward through the motor. The energy storage device may be a battery swapping station, an energy storage power station, etc. Among them, the battery swapping station usually has multiple batteries, and these batteries can be replaced for use in the electrical equipment. The batteries of the energy storage power station can store electrical energy, and when electrical energy is needed, the batteries of the energy storage power station can also send the electrical energy back to the electrical equipment such as the power grid.

[0076] For ease of description, in the following embodiments, the battery thermal management system is taken as an example applied to the energy storage device for illustration.

[0077] Figure 1 Schematically shown is a schematic diagram of an energy storage device according to some embodiments of the present application. Referring to Figure 1 , the energy storage device 10 includes a support frame 11 and a battery 12, and the battery 12 is installed on the support frame 11. The support frame 11 may be a box structure or a frame structure, etc. One or more batteries 12 may be provided on the support frame 11. The energy storage device 10 may be an energy storage power station, and the battery 12 refers to a single physical module including one or more battery cells to provide a higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack, etc.

[0078] The energy storage device 10 further includes a battery 12 thermal management system, and the battery 12 thermal management system is used to adjust the temperature of the battery 12. The heat exchange component 200 of the battery 12 thermal management system may be correspondingly arranged with the battery 12. Among them, one heat exchange component 200 may be correspondingly arranged for each battery 12, or one heat exchange component 200 may be correspondingly arranged for a battery 12 group composed of multiple batteries 12. The heat exchange component 200 performs heat exchange with the battery 12 to adaptively adjust the temperature of the battery 12.

[0079] As Figure 2 shown, Figure 2Schematically shown is a schematic diagram of a battery 12 thermal management system according to some embodiments of the present application. Embodiments of the present application provide a battery 12 thermal management system, including a compressor 100, a heat exchange component 200, a first refrigerant flow path 310, a second refrigerant flow path 320, a third refrigerant flow path 330, a fourth refrigerant flow path 340, a condenser 700, an evaporator 800, a first control valve group 910, and a second control valve group 920. The heat exchange component 200 is used for heat exchange with the battery 12. The first refrigerant flow path 310 connects the refrigerant inlet of the heat exchange component 200 to the refrigerant outlet of the compressor 100. The second refrigerant flow path 320 connects the refrigerant inlet of the heat exchange component 200 to the refrigerant outlet of the compressor 100. The third refrigerant flow path 330 connects the refrigerant outlet of the heat exchange component 200 to the refrigerant inlet of the compressor 100. The fourth refrigerant flow path 340 connects the refrigerant outlet of the heat exchange component 200 to the refrigerant inlet of the compressor 100. The condenser 700 is disposed in the first refrigerant flow path 310, and the evaporator 800 is disposed in the fourth refrigerant flow path 340. The first control valve group 910 is connected to the first refrigerant flow path 310 and the second refrigerant flow path 320, and is adapted to selectively conduct one of the first refrigerant flow path 310 and the second refrigerant flow path 320. The second control valve group 920 is connected to the third refrigerant flow path 330 and the fourth refrigerant flow path 340, and is adapted to selectively conduct one of the third refrigerant flow path 330 and the fourth refrigerant flow path 340.

[0080] The compressor 100 is a driven fluid machine that raises low-pressure gas to high-pressure gas. It sucks in low-temperature and low-pressure refrigerant from its own refrigerant inlet, compresses it through the operation of the motor driving the piston, and then discharges high-temperature and high-pressure refrigerant to its own refrigerant outlet, providing power for the refrigerant cycle.

[0081] Refrigerant, also known as refrigerant, refrigerant, etc., is a medium for completing energy conversion in various heat engines.

[0082] The heat exchange component 200 is a component capable of heat exchange with the battery 12. A refrigerant channel can be provided therein for the refrigerant to flow through. The refrigerant inlet of the heat exchange component 200 is also the refrigerant inlet of the refrigerant channel therein, and the refrigerant outlet of the heat exchange component 200 is also the refrigerant outlet of the refrigerant channel therein. When the refrigerant flows through the heat exchange component 200, heat exchange can occur between the heat exchange component 200 and the battery 12. The heat exchange component 200 can be disposed in close contact with the battery 12, and the heat of the battery 12 can be directly transferred to the refrigerant through the heat exchange component 200 to improve the heat exchange efficiency. The heat exchange component 200 can be disposed on the bottom surface, top surface, side surface, etc. of the battery 12.

[0083] The condenser 700 is a heat exchanger capable of heat exchange, and is provided with a refrigerant channel therein, and the refrigerant channel is used for the refrigerant to flow through. The refrigerant inlet of the condenser 700 is also the refrigerant inlet of the refrigerant channel therein, and the refrigerant outlet of the condenser 700 is also the refrigerant outlet of the refrigerant channel therein. When the refrigerant flows through the condenser 700, heat can be dissipated and the temperature can be reduced. The condenser 700 is arranged on the first refrigerant flow path 310. When the first refrigerant flow path 310 is turned on, the refrigerant can flow from the compressor 100 through the condenser 700 and then flow to the heat exchange component 200.

[0084] The evaporator 800 is also a heat exchanger capable of heat exchange, and a refrigerant flow channel is provided therein, and the refrigerant flow channel is used for the refrigerant to flow through. The refrigerant inlet of the evaporator 800 is also the refrigerant inlet of the refrigerant flow channel therein, and the refrigerant outlet of the evaporator 800 is also the refrigerant outlet of the refrigerant flow channel therein. When the refrigerant flows through the evaporator 800, it can absorb heat and heat up. The evaporator 800 is provided on the fourth refrigerant flow path 340. When the fourth refrigerant flow path 340 is turned on, the refrigerant can flow from the heat exchange component 200 through the evaporator 800 and then flow to the compressor 100.

[0085] The first refrigerant flow path 310, the second refrigerant flow path 320, the third refrigerant flow path 330 and the fourth refrigerant flow path 340 are all flow paths for the flow of refrigerant, and they can all be refrigerant pipes. Figure 2 As shown, the refrigerant outlet of the compressor 100 may be connected to the first main flow path 101, the refrigerant inlet of the first refrigerant flow path 310 and the refrigerant inlet of the second refrigerant flow path 320 may be connected to the first main flow path 101, and communicate with the refrigerant outlet of the compressor 100 through the first main flow path 101; the refrigerant inlet of the compressor 100 may be connected to the second main flow path 102, the refrigerant outlet of the third refrigerant flow path 330 and the refrigerant outlet of the fourth refrigerant flow path 340 may be connected to the second main flow path 102, and communicate with the refrigerant inlet of the compressor 100 through the second main flow path 102; The refrigerant inlet of the heat exchange component 200 can be connected to the third main flow path 201, the refrigerant outlet of the first refrigerant flow path 310 and the refrigerant outlet of the second refrigerant flow path 320 can both be connected to the third main flow path 201, and communicate with the refrigerant inlet of the heat exchange component 200 through the third main flow path 201; the refrigerant outlet of the heat exchange component 200 can be connected to the fourth main flow path 202, the refrigerant inlet of the third refrigerant flow path 330 and the refrigerant inlet of the fourth refrigerant flow path 340 can both be connected to the fourth main flow path 202, and communicate with the refrigerant outlet of the heat exchange component 200 through the fourth main flow path 202.

[0086] like Figure 2As shown, downstream of the condenser 700, a first one-way valve 361 may be further provided on the first refrigerant flow path 310 to reduce the possibility of the refrigerant flowing back to the first refrigerant flow path 310 when the second refrigerant flow path 320 is connected; downstream of the evaporator 800, a second one-way valve 362 may be further provided on the fourth refrigerant flow path 340 to reduce the possibility of the refrigerant flowing back to the fourth refrigerant flow path 340 when the third refrigerant flow path 330 is connected.

[0087] The first control valve group 910 is connected to both the first refrigerant flow path 310 and the second refrigerant flow path 320. The first control valve group 910 is suitable for enabling either the first refrigerant flow path 310 or the second refrigerant flow path 320 to be conductive. It can be understood that the first control valve group 910 can enable the first refrigerant flow path 310 to be conductive and the second refrigerant flow path 320 to be closed, or it can enable the second refrigerant flow path 320 to be conductive and the first refrigerant flow path 310 to be closed. At the same time, the first control valve group 910 can also enable the first refrigerant flow path 310 and the second refrigerant flow path 320 to switch between the above two states. The first control valve group 910 may include a multi-way valve, for example, a multi-way solenoid valve, which is connected to the outlet of the compressor 100, the first refrigerant flow path 310 and the second refrigerant flow path 320, and controls the conductiveness of either the first refrigerant flow path 310 or the second refrigerant flow path 320 by switching the corresponding connecting ports. Figure 2 As shown, the first control valve group 910 may also include a first valve component 911 arranged on the first refrigerant flow path 310 and a second valve component 912 on the second refrigerant flow path 320. The first valve component 911 controls the on-off of the first refrigerant flow path 310, and the second valve component 912 controls the on-off of the second refrigerant flow path 320, so as to realize the selective conduction of the first refrigerant flow path 310 and the second refrigerant flow path 320. The first valve component 911 and the second valve component 912 may be solenoid valves, etc.

[0088] The second control valve group 920 is connected to both the third refrigerant flow path 330 and the fourth refrigerant flow path 340. The second control valve group 920 is suitable for connecting the third refrigerant flow path 330 and the fourth refrigerant flow path 340. It can be understood that the second control valve group 920 can connect the third refrigerant flow path 330 and close the fourth refrigerant flow path 340, or can connect the third refrigerant flow path 330 and close the fourth refrigerant flow path 340. At the same time, the second control valve group 920 can also switch the third refrigerant flow path 330 and the fourth refrigerant flow path 340 between the above two states. The second control valve group 920 may include a multi-way valve, for example, a multi-way solenoid valve, which is connected to the refrigerant inlet of the compressor 100, the third refrigerant flow path 330 and the fourth refrigerant flow path 340, and controls the connection of the third refrigerant flow path 330 and the fourth refrigerant flow path 340 by switching the corresponding connecting ports. Figure 2As shown, the second control valve group 920 may also include a third valve member 921 disposed on the third refrigerant flow path 330 and a fourth valve member 922 disposed on the fourth refrigerant flow path 340. The on / off of the third refrigerant flow path 330 is controlled by the third valve member 921, and the on / off of the fourth refrigerant flow path 340 is controlled by the fourth valve member 922, so as to achieve alternative conduction of the third refrigerant flow path 330 and the fourth refrigerant flow path 340. Both the third valve member 921 and the fourth valve member 922 may be valve members such as solenoid valves.

[0089] When the battery 12 needs to be heated, the first control valve group 910 is controlled to conduct the second refrigerant flow path 320, and the second control valve group 920 is controlled to conduct the fourth refrigerant flow path 340. At this time, the refrigerant flowing out of the compressor 100 flows into the heat exchange assembly 200 through the second refrigerant flow path 320. The refrigerant exchanges heat with the battery 12 in the heat exchange assembly 200 to raise the temperature of the battery 12. The refrigerant flowing out of the heat exchange assembly 200 flows to the evaporator 800. After the refrigerant evaporates and absorbs heat in the evaporator 800, it flows to the compressor 100, forming a heating cycle circuit. When the battery 12 needs to be cooled, the second control valve group 920 is controlled to conduct the first refrigerant flow path 310, and the second control valve group 920 is controlled to conduct the third refrigerant flow path 330. At this time, the refrigerant flowing out of the compressor 100 flows to the heat exchange assembly 200 after being cooled by the condenser 700. The refrigerant exchanges heat with the battery 12 in the heat exchange assembly 200 to cool the battery 12. The refrigerant flowing out of the heat exchange assembly 200 flows to the compressor 100 through the third refrigerant circuit, forming a refrigeration cycle circuit.

[0090] It should be noted that the switching control of the first control valve group 910 and the second control valve group 920 can be realized by a controller. The controller is electrically connected to the first control valve group 910 and the second control valve group 920, and controls the actions of the first control valve group 910 and the second control valve group 920 according to corresponding control signals, so that the battery 12 thermal management system is in a refrigeration or heating working condition. When the battery 12 thermal management system is applied to the energy storage device 10, the controller may be the intelligent control system of the energy storage device 10; when the battery 12 thermal management system is applied to an electrical device, such as a vehicle, the controller may be the intelligent control system of the electrical device; in some cases, a controller may also be separately provided in the battery 12 thermal management system.

[0091] In the battery 12 thermal management system, by switching the first control valve group 910 and the second control valve group 920, the heat exchange assembly 200 can both heat the battery 12 and cool the battery 12, improving the temperature regulation ability of the battery 12. At the same time, when the battery 12 thermal management system heats and cools the battery 12, the same set of system can be used, which occupies less space and has lower cost.

[0092] According to some embodiments of the present application, optionally, as Figure 3 shownFigure 3 The figure schematically shows a schematic diagram of the battery 12 thermal management system according to some embodiments of the present application. The first refrigerant flow path 310 includes a first sub-flow path 311 and a second sub-flow path 312. The first sub-flow path 311 is connected between the refrigerant outlet of the compressor 100 and the refrigerant inlet of the condenser 700, and the second sub-flow path 312 is connected between the refrigerant outlet of the condenser 700 and the refrigerant inlet of the heat exchange component 200. The battery 12 thermal management system further includes a fifth refrigerant flow path 350 and a third control valve group 930. The refrigerant inlet of the fifth refrigerant flow path 350 is communicated with the second sub-flow path 312, the refrigerant outlet of the fifth refrigerant flow path 350 is connected to the refrigerant inlet of the evaporator 800, and the third control valve group 930 is arranged on the fifth refrigerant flow path 350 and is adapted to control the fifth refrigerant flow path 350 to be conducted or disconnected.

[0093] The first sub-flow path 311, the second sub-flow path 312 and the fifth refrigerant flow path 350 are all channels for the refrigerant to flow. When the first refrigerant flow path 310 is conducted, the refrigerant flowing out of the compressor 100 sequentially flows through the first sub-flow path 311, the condenser 700, and the second sub-flow path 312 and then flows to the heat exchange component 200.

[0094] As Figure 3 shown, in one implementation, the fourth refrigerant flow path 340 includes a fifth sub-flow path 341 and a sixth sub-flow path 342. The fifth sub-flow path 341 is connected between the refrigerant outlet of the heat exchange component 200 and the refrigerant inlet of the evaporator 800, and the sixth sub-flow path 342 is connected between the refrigerant outlet of the evaporator 800 and the refrigerant inlet of the second main flow path 102. The fifth refrigerant flow path 350 can be communicated with the fifth sub-flow path 341, so as to be communicated with the refrigerant inlet of the evaporator 800. Among them, the second control valve group 920 (i.e., the fourth valve member 922) can be arranged on the fifth sub-flow path 341, and the fifth refrigerant flow path 350 is connected to the flow path between the fourth valve member 922 and the evaporator 800. In this way, the fourth valve member 922 can control whether the flow path between the heat exchange component 200 and the evaporator 800 is conducted, but does not affect the on-off between the fifth refrigerant flow path 350 and the evaporator 800.

[0095] The third control valve group 930 can be a solenoid valve. The third control valve group 930 is mainly used to control the fifth refrigerant flow path 350 to be conducted or closed when the first control valve group 910 conducts the first refrigerant flow path 310. That is to say, when the battery 12 thermal management system makes the heat exchange component 200 in the refrigeration working condition, the third control valve group 930 can control whether the fifth refrigerant flow path 350 is opened.

[0096] Combined with Figure 3As shown, when the fifth refrigerant flow path 350 is opened, in addition to flowing to the heat exchange component 200, part of the refrigerant flowing out of the condenser 700 will be diverted into the fifth refrigerant flow path 350, and after passing through the evaporator 800, it will flow back to the refrigerant inlet of the compressor 100. In this operating condition, the evaporator 800 can divert the refrigerant, reducing the refrigeration capacity of the heat exchange component 200. This can be applied to the operating condition with a lower heat dissipation demand of the battery 12, increasing the adjustable range of the refrigeration capacity of the heat exchange component 200, which is beneficial to improving the temperature control ability of the battery 12.

[0097] According to some embodiments of the present application, optionally, as Figure 2 and Figure 3 shown, a first expansion valve 410 is further provided on the second sub-flow path 312, and the inlet of the fifth refrigerant flow path 350 is provided between the first expansion valve 410 and the condenser 700.

[0098] The first expansion valve 410 is also an expansion valve, which is a type of throttling element. The first expansion valve 410 can throttle the refrigerant to cause pressure and other changes, and it can play the roles of throttling and pressure reduction and flow regulation.

[0099] Part of the refrigerant flowing out of the condenser 700 flows to the heat exchange component 200 after passing through the first expansion valve 410, which can improve the operating stability of the battery 12 thermal management system. At the same time, since the pressure of the refrigerant in the first expansion valve 410 is usually greater than the pressure of the refrigerant after the first expansion valve 410, setting the fifth refrigerant flow path 350 before the first expansion valve 410 is beneficial for the refrigerant to be smoothly diverted and flow into the fifth refrigerant flow path 350.

[0100] According to some embodiments of the present application, optionally, as Figure 4 shown, Figure 4 schematically shows a schematic diagram of the battery 12 thermal management system according to some embodiments of the present application; the battery 12 thermal management system further includes a subcooler 500, the subcooler 500 is connected to the second sub-flow path 312 and is located between the condenser 700 and the first expansion valve 410, and / or the subcooler 500 is connected to the second refrigerant flow path 320.

[0101] The subcooler 500 is a heat exchanger that can perform heat exchange, and a refrigerant channel is provided therein for the refrigerant to flow through. The subcooler 500 can cool the refrigerant.

[0102] The subcooler 500 can be arranged on the second sub-flow path 312 and located between the condenser 700 and the first expansion valve 410. In this way, when the first refrigerant flow path 310 is connected and the second refrigerant flow path 320 is closed, that is, when the battery 12 thermal management system cools the heat exchange component 200, the refrigerant flowing from the compressor 100 to the condenser 700, after being condensed by the condenser 700, first flows through the subcooler 500, and then flows through the first expansion valve 410 and then into the heat exchange component 200. The subcooler 500 can further cool the refrigerant flowing out of the condenser 700 to the subcooled liquid state first. In this way, when the refrigerant flows into the heat exchange component 200, it can have a higher heat exchange efficiency, improving the temperature reduction effect of the heat exchange component 200 on the battery 12.

[0103] The subcooler 500 can also be connected to the second refrigerant flow path 320. When the second refrigerant flow path 320 is conducted and the first refrigerant flow path 310 is closed, that is, when the battery 12 thermal management system heats the heat exchange component 200, the refrigerant flowing out of the compressor 100 first flows through the subcooler 500 and then into the heat exchange component 200. The subcooler 500 can cool the refrigerant flowing out of the compressor 100, enabling the refrigerant in the superheated gas state to be partially or fully converted into the refrigerant in the saturated gas state. In this way, when the refrigerant enters the heat exchange component 200, in the heat exchange component 200, the refrigerant can utilize the phase change latent heat for heat exchange to a greater extent, and the temperature change of the refrigerant before and after heat exchange is smaller, making the temperature change of the heat exchange component 200 smaller, and further making the temperature change of the battery 12 connected to the heat exchange component 200 smaller. That is to say, when the heat exchange component 200 exchanges heat with the battery 12 and supplies heat to the battery 12, in this process, it may only be the transfer of heat, but the temperature of the heat exchange component 200 can be maintained unchanged, thereby reducing the possibility of excessive temperature change of the battery 12 and reducing the possibility of damage to the performance of the battery 12 due to excessive temperature change.

[0104] It should be noted that the battery 12 thermal management system can be provided with relatively independent subcoolers 500 respectively in the heating and cooling working conditions, or can share a subcooler 500. When sharing a subcooler 500 in heating and cooling, the subcooler 500 is connected to both the second sub-flow path 312 and the second refrigerant flow path 320.

[0105] According to some embodiments of the present application, optionally, as Figure 4As shown, the second refrigerant flow path 320 includes a third sub-flow path 321 and a fourth sub-flow path 322. The third sub-flow path 321 is connected between the refrigerant outlet of the compressor 100 and the refrigerant inlet of the subcooler 500. The fourth sub-flow path 322 is connected between the refrigerant outlet of the subcooler 500 and the refrigerant inlet of the heat exchange component 200. The second sub-flow path 312 includes a first pipe section 313 and a second pipe section 314. The second pipe section 314 is connected between the refrigerant outlet of the condenser 700 and the refrigerant inlet of the subcooler 500. The first pipe section 313 is connected between the refrigerant outlet of the subcooler 500 and the refrigerant inlet of the first expansion valve 410. The first control valve group 910 is connected to the first sub-flow path 311 and the third sub-flow path 321 to communicate, and is used to control the alternative communication between the first sub-flow path 311 and the third sub-flow path 321. The battery 12 thermal management system further includes a fourth control valve group 940. The fourth control valve group 940 is connected to the first pipe section 313 and the fourth sub-flow path 322, and is adapted to alternatively communicate the fourth sub-flow path 322 and the first pipe section 313.

[0106] The position where the first control valve group 910 is connected to the first sub-flow path 311 may be located between the refrigerant inlet of the condenser 700 and the refrigerant outlet of the compressor 100. The control of the first sub-flow path 311 and the third sub-flow path 321 by the first control valve group 910 is to achieve the on-off control of the first refrigerant flow path 310 and the second refrigerant flow path 320.

[0107] The fourth control valve group 940 is connected to both the first pipeline and the fourth sub-flow path 322. The fourth control valve group 940 is adapted to alternatively conduct the first pipeline and the fourth sub-flow path 322. It can be understood that the fourth control valve group 940 can close the first pipeline and the fourth sub-flow path 322, or can conduct the first pipeline and close the fourth sub-flow path 322. At the same time, the fourth control valve group 940 can also switch the first pipeline and the fourth sub-flow path 322 between the above two states. The fourth control valve group 940 may include a multi-way valve. For example, a multi-way solenoid valve. The multi-way valve is connected to the outlet of the subcooler 500, the first pipeline and the fourth sub-flow path 322, and controls the alternative conduction of the first pipeline and the fourth sub-flow path 322 by switching the corresponding communication ports. As Figure 4 shown, the fourth control valve group 940 may also include a fifth valve member 941 provided on the first pipeline and a sixth valve member 942 provided on the fourth sub-flow path 322. The on-off of the first pipeline is controlled by the fifth valve member 941, and the on-off of the sixth valve member 942 is controlled by the sixth valve member 942 to achieve the alternative conduction of the first pipeline and the fourth sub-flow path 322. The fifth valve member 941 and the sixth valve member 942 may be solenoid valves or the like.

[0108] Refer to Figure 4As shown in the figure, in the battery 12 heat exchange system of this embodiment, a subcooler 500 is shared in the heating and cooling conditions. The refrigerant outlet of the third sub-flow path 321 is communicated with the refrigerant inlet of the fourth sub-flow path 322 through the subcooler 500. At the same time, the refrigerant outlet of the second pipe section 314 is communicated with the refrigerant inlet of the first pipe section 313 through the subcooler 500. That is to say, the third sub-flow path 321 and the second pipe section 314 are connected in parallel at the refrigerant inlet of the subcooler 500, and the fourth sub-flow path 322 and the first pipe section 313 are connected in parallel at the refrigerant outlet of the subcooler 500. The first control valve group 910 and the fourth control valve group 940 are used to open or close the corresponding flow paths in the refrigeration and heating conditions. Among them, when the heat exchange component 200 is in refrigeration, the first refrigerant flow path 310 needs to be conducted and the second refrigerant flow path 320 needs to be closed. The specific operation is as follows: the first control valve group 910 conducts the first sub-flow path 311 and closes the third sub-flow path 321. At the same time, the fourth control valve group 940 conducts the first pipeline (when the first pipeline is conducted, the second sub-flow path 312 is conducted) and closes the fourth sub-flow path 322. At this time, the refrigerant flowing out of the compressor 100 flows through the first sub-flow path 311, the condenser 700, the second pipe section 314, the subcooler 500, the second pipe section 314, and the first expansion valve 410 and then flows to the heat exchange component 200. When the heat exchange component 200 is in heating, the second refrigerant flow path 320 needs to be conducted and the first refrigerant flow path 310 needs to be closed. The specific operation is as follows: the first control valve group 910 conducts the third sub-flow path 321 and closes the first sub-flow path 311. At the same time, the fourth control valve group 940 closes the first pipeline (when the first pipeline is closed, the second sub-flow path 312 is closed) and conducts the fourth sub-flow path 322. At this time, the refrigerant flowing out of the compressor 100 flows through the third sub-flow path 321, the subcooler 500, and the fourth sub-flow path 322 and then flows to the heat exchange component 200.

[0109] It should be noted that a third check valve 363 may be provided on the first pipe section 313 to reduce the possibility of refrigerant reflux in the first pipe section 313 when the fourth sub-flow path 322 is connected.

[0110] In this embodiment, a set of condensers 700 can be shared in the refrigeration and heating conditions, with lower equipment costs and less occupied space.

[0111] According to some embodiments of the present application, optionally, as Figures 2 to 4 shown, the first control valve group 910 includes a first valve member 911 provided on the first sub-flow path 311 and a second valve member 912 provided on the third sub-flow path 321; and / or, the second control valve group 920 includes a third valve member 921 provided on the third refrigerant flow path 330 and a fourth valve member 922 provided on the fourth refrigerant flow path 340; and / or, the fourth control valve group 940 includes a fifth valve member 941 provided on the first pipe section 313 and a sixth valve member 942 provided on the fourth sub-flow path 322.

[0112] The first valve component 911, the second valve component 912, the third valve component 921, the fourth valve component 922, the fifth valve component 941 and the sixth valve component 942 can all be on-off valves such as solenoid valves. The first valve component 911 can control the on-off of the first sub-flow path 311, that is, when the first valve component 911 is opened, the first sub-flow path 311 is connected, and when the second valve component 912 is closed, the first sub-flow path 311 is closed. The second valve component 912 can control the on-off of the third sub-flow path 321, that is, when the second valve component 912 is opened, the third sub-flow path 321 is connected, and when the second valve component 912 is closed, the third sub-flow path 321 is closed. The third valve component 921 can control the on-off of the third refrigerant flow path 330, that is, when the third valve component 921 is opened, the third refrigerant flow path 330 is connected, and when the third valve component 921 is closed, the third refrigerant flow path 330 is closed. The fourth valve member 922 can control the on-off of the fourth refrigerant flow path 340, that is, when the fourth valve member 922 is opened, the fourth refrigerant flow path 340 is connected, and when the fourth valve member 922 is closed, the fourth refrigerant flow path 340 is closed. The fifth valve member 941 can control the on-off of the first pipeline, that is, when the fifth valve member 941 is opened, the first pipeline is connected, and when the fifth valve member 941 is closed, the first pipeline is closed. The sixth valve member 942 can control the on-off of the fourth sub-flow path 322, that is, when the sixth valve member 942 is opened, the fourth sub-flow path 322 is connected, and when the sixth valve member 942 is closed, the fourth sub-flow path 322 is closed.

[0113] The on and off of the corresponding flow path is directly controlled by each valve, which is easy to operate and has simple control logic.

[0114] According to some embodiments of the present application, optionally, Figures 2 to 4 As shown, the battery 12 thermal management system also includes a second expansion valve 420, which is arranged on the fourth refrigerant flow path 340 and is located between the refrigerant outlet of the heat exchange component 200 and the refrigerant inlet of the evaporator 800, and the refrigerant outlet of the fifth refrigerant flow path 350 is connected to the refrigerant inlet of the second expansion valve 420.

[0115] The second expansion valve 420 is also an expansion valve, which is a type of throttling element. The first expansion valve 410 can throttle the refrigerant to cause changes in pressure, etc., and can play the role of throttling, reducing pressure and regulating flow.

[0116] Reference Figure 3 and Figure 4 As shown, the second expansion valve 420 may be disposed on the fifth sub-flow path 341 and located downstream of the fifth refrigerant flow path 350 and the fourth valve member 922 .

[0117] Before the refrigerant flows into the evaporator 800, it first passes through the second expansion valve 420, which can improve the operating stability of the thermal management system of the battery 12. At the same time, the refrigerant from the fifth refrigerant flow path 350 and the refrigerant of the heat exchange component 200 can share a set of second expansion valves 420, resulting in a lower equipment investment cost and a more concise component layout.

[0118] According to some embodiments of the present application, optionally, as Figure 5 shown, Figure 5 Schematically shown is a schematic diagram of the thermal management system of the battery 12 according to some embodiments of the present application. The thermal management system of the battery 12 further includes a first detection component 610. The refrigerant inlet and / or refrigerant outlet of the heat exchange component 200 is / are connected to the first detection component 610, and the first detection component 610 is adapted to detect the refrigerant flow rate flowing through the heat exchange component 200.

[0119] The refrigerant flow rate flowing through the heat exchange component 200 can be the mass of the refrigerant flowing through the heat exchange component 200 per unit time. The first detection component 610 can be a flow detector, etc. The first detection component 610 can be directly disposed at the refrigerant inlet or the refrigerant outlet of the heat exchange component 200, or can be disposed on the flow path connected to the refrigerant inlet or the refrigerant outlet of the heat exchange component 200. For example, the first detection component 610 can be disposed on the third main flow path 201 or the fourth main flow path 202, or can be disposed on the corresponding flow path directly connected to the third main flow path 201 or the fourth main flow path 202.

[0120] By setting the first detection component 610, the refrigerant flow rate flowing through the heat exchange component 200 can be detected, and the heat exchange capacity of the heat exchange component 200 can be predicted based on the refrigerant flow rate, which is beneficial to controlling the temperature regulation of the battery 12.

[0121] According to some embodiments of the present application, optionally, referring to Figure 5 and further combining Figures 6 to 8 , Figure 6 Schematically shown is a schematic diagram of the thermal management system of the battery 12 according to some embodiments of the present application. Figure 7 Schematically shown is Figure 6 the operating schematic diagram of the thermal management system of the battery 12 for cooling the battery 12. Figure 8 Schematically shown is Figure 6 the operating schematic diagram of the thermal management system of the battery 12 for heating the battery 12. The first detection component 610 is connected to the first refrigerant flow path 310 and the fourth refrigerant flow path 340.

[0122] Since the first detection component 610 is required to detect the refrigerant flow rate through the heat exchange component 200, when the first detection component 610 is connected to the first refrigerant flow path 310, it can be arranged relatively close to the third main flow path 201. When the first detection component 610 is connected to the fourth refrigerant flow path 340, it can be arranged relatively close to the fourth main flow path 202. In this embodiment, as Figure 5 and Figure 6 shown, the first detection component 610 is arranged on the first pipe segment 313 and is located between the refrigerant inlet of the fifth refrigerant flow path 350 and the first expansion valve 410. The third one-way valve 363 can be arranged between the first detection component 610 and the first expansion valve 410. At the same time, the fifth sub-flow path 341 is connected to the first detection component 610 through the first pipe segment 313. In the refrigeration working condition, the refrigerant flowing to the heat exchange component 200 flows into the heat exchange component 200 after passing through the first detection component 610. The first detection component 610 can detect the refrigerant flow rate through the heat exchange component 200. In the heating working condition, the refrigerant flowing out of the heat exchange component 200 flows into the evaporator 800 after passing through the first detection component 610. The first detection component 610 can detect the refrigerant flow path through the heat exchange component 200.

[0123] In this embodiment, the first detection component 610 is connected to the first refrigerant flow path 310 and the fourth refrigerant flow path 340. In this way, a set of first detection components 610 can be shared under both refrigeration and heating working conditions, with lower equipment costs and a more concise component layout. At the same time, the temperature of the refrigerant flowing from the first refrigerant flow path 310 into the heat exchange component 200 and the refrigerant flowing from the heat exchange component 200 to the fourth refrigerant flow path 340 is relatively low, and the content of the refrigerant in the liquid state is relatively large, so the flow rate detection is more accurate.

[0124] According to some embodiments of the present application, optionally, as Figures 2 to 6 shown, the battery 12 thermal management system further includes a second detection component 620 and a third detection component 630. The second detection component 620 is arranged at the refrigerant inlet of the heat exchange component 200, and the third detection component 630 is arranged at the refrigerant outlet of the heat exchange component 200. The second detection component 620 and the third detection component 630 are respectively adapted to detect the refrigerant pressure at the refrigerant inlet and the refrigerant outlet of the heat exchange component 200, and / or, the second detection component 620 and the third detection component 630 are respectively adapted to detect the refrigerant temperature at the refrigerant inlet and the refrigerant outlet of the heat exchange component 200.

[0125] The second detection component 620 can be used to detect the refrigerant pressure at the refrigerant inlet of the heat exchange component 200, and the third detection component 630 can be used to detect the refrigerant pressure at the refrigerant outlet of the heat exchange component 200. At this time, according to the known corresponding relationship between the refrigerant pressure and temperature, the refrigerant temperatures at the refrigerant inlet and outlet of the heat exchange component 200 can be obtained. The second detection component 620 can be used to detect the refrigerant temperature at the refrigerant inlet of the heat exchange component 200, and the third detection component 630 can be used to detect the refrigerant temperature at the refrigerant outlet of the heat exchange component 200. At this time, according to the known corresponding relationship between the refrigerant pressure and temperature, the refrigerant pressures at the refrigerant inlet and outlet of the heat exchange component 200 can be obtained. The second detection component 620 can also simultaneously detect the refrigerant pressure and temperature at the refrigerant inlet of the heat exchange component 200, and the third detection component 630 can simultaneously detect the refrigerant pressure and temperature at the refrigerant outlet of the heat exchange component 200.

[0126] Both the second detection component 620 and the third detection component 630 can be PT sensors (pressure and temperature sensors). The second detection component 620 can be directly disposed at the refrigerant inlet of the heat exchange component 200 or on the flow path connected to the refrigerant inlet of the heat exchange component 200. For example, the second detection component 620 can be disposed on the third main flow path 201. The third detection component 630 can be directly disposed at the refrigerant outlet of the heat exchange component 200 or on the flow path connected to the refrigerant outlet of the heat exchange component 200. For example, the third detection component 630 can be disposed on the fourth main flow path 202.

[0127] By detecting the refrigerant temperature and pressure at the refrigerant inlet of the heat exchange component 200, the heat exchange capacity of the heat exchange component 200 can be assisted in obtaining, which is beneficial to controlling the temperature regulation of the battery 12. Moreover, when the first detection component 610, the second detection component 620, and the third detection component 630 are simultaneously provided, the change in the enthalpy value of the refrigerant can be inferred based on the refrigerant temperature and pressure before and after the heat exchange component 200, and combined with the refrigerant flow rate flowing through the heat exchange component 200, the heat exchange capacity of the heat exchange component 200 can be calculated more accurately. Thus, the heat exchange capacity of the heat exchange component 200 can be tested, and the heat exchange component 200 can also be more precisely controlled according to the heat exchange capacity of the heat exchange component 200, thereby improving the accuracy of temperature regulation of the battery 12.

[0128] According to some embodiments of the present application, optionally, as Figures 2 to 6 shown, the battery 12 thermal management system further includes a flow rate adjustment component 640. A flow rate adjustment component 640 is provided at the refrigerant inlet of the compressor 100, and the flow rate adjustment component 640 is adapted to adjust the refrigerant flow rate flowing through the compressor 100.

[0129] The refrigerant flow rate through the compressor 100 is also the refrigerant flow rate flowing in the battery 12 thermal management system, which can be understood by referring to the refrigerant mass flowing through the flow rate regulating component 640 per unit time.

[0130] The flow rate regulating component 640 can be a solenoid valve or a throttle valve 641, etc. By setting the flow rate regulating component 640, the refrigerant flow rate flowing in the battery 12 thermal management system can be adjusted. When the refrigerant flow rate decreases, the heating or cooling capacity of the battery 12 thermal management system decreases. When the refrigerant flow rate increases, the heating or cooling capacity of the battery 12 thermal management system increases.

[0131] The number of batteries 12 of different energy storage devices 10 or different electrical equipment may be different. Multiple heat exchange components 200 are connected in series or in parallel in a set of battery 12 thermal management systems. When the number of batteries 12 and the number of heat exchange components 200 are different, the system load of the battery 12 thermal management system will change greatly. The heat exchange amount required by the battery 12 thermal management system may be in a large range of 1 kilowatt to 10 kilowatts. By setting the flow rate regulating component 640, the heat exchange adjustment ability of the battery 12 thermal management system can be increased, so that the battery 12 thermal management system can adapt to various heat exchange power requirements. At the same time, when this battery 12 thermal management system is used to test the heat exchange ability of the heat exchange component 200, only the heat exchange component 200 needs to be replaced, and various heat exchange components 200 can be tested, and the test cost of the battery 12 thermal management system is relatively low.

[0132] It should also be noted that the flow rate regulating component 640 is arranged at the inlet of the compressor 100, reducing the possibility of adverse effects on the operation of the compressor 100 due to the throttling effect of the flow rate regulating component 640. For example, it reduces the possibility of excessive pressure of the compressor 100, and the stability of the battery 12 thermal management system is better.

[0133] According to some embodiments of the present application, optionally, the flow rate regulating component 640 includes a throttle valve 641.

[0134] The flow rate regulating component 640 only includes the throttle valve 641, and the throttle valve 641 can be connected to the second main flow path 102. The flow rate regulating component 640 can also be provided with other components on the basis of the throttle valve 641.

[0135] The refrigerant flow rate of the battery 12 thermal management system is adjusted by the throttle valve 641. While adjusting the flow rate, the throttle valve 641 can stabilize the system pressure and improve the stability of the system operation.

[0136] According to some embodiments of the present application, optionally, as Figures 2 to 6As shown, the evaporator 800 includes a refrigerant flow channel and a medium flow channel that exchange heat with each other. The refrigerant flow channel is connected to the refrigerant inlet and the refrigerant outlet of the evaporator 800; the battery 12 thermal management system further includes a medium supply device 810. The medium supply device 810 includes a heating device 811, a first medium pipeline 812, a second medium pipeline 813, and a medium driving component 814. The heating device 811 is adapted to heat the medium flowing through the heating device 811. The medium inlet of the heating device 811 is connected to the medium outlet of the medium flow channel through the first medium pipeline 812, and the medium outlet of the heating device 811 is connected to the medium inlet of the medium flow channel through the second medium pipeline 813. The medium driving component 814 is used to drive the medium to flow, and the medium driving component 814 is provided on the first medium pipeline 812 and / or the second medium pipeline 813.

[0137] The medium that exchanges heat with the refrigerant in the evaporator 800 can be a liquid or a gas fluid, specifically water. The medium supply device 810 is used to supply the medium. In this embodiment, water is taken as an example of the medium for illustration. The heating device 811 includes a medium storage container 8111 and a heating component 8112. The medium storage container 8111 stores the medium, and the heating component 8112 is connected to the medium storage container 8111 and is used to heat the medium. The heating component 8112 can be an electric heating tube or the like.

[0138] The medium flow channel is a channel for the medium to flow. The first medium pipeline 812 and the second medium pipeline 813 are pipelines for the medium to flow. The medium driving component 814 can be a power device such as a water pump, which can drive the medium to circulate between the medium supply device 810 and the medium flow channel of the heat exchanger. The medium driving component 814 can also be provided on the first medium pipeline 812 or on the second medium pipeline 813.

[0139] The medium is heated and raised in temperature in the heating device 811, that is, in the medium storage container 8111. Under the driving force of the medium driving component 814, the heated medium flows from the medium outlet of the medium storage container 8111 through the second medium pipeline 813 to the medium flow channel of the evaporator 800. The refrigerant exchanges heat with the medium in the evaporator 800, and the medium returns to the heating device 811 through the first medium pipeline 812.

[0140] By setting the medium supply component, a medium such as water can be used to exchange heat with the refrigerant, improving the heat exchange effect of the evaporator 800.

[0141] According to some embodiments of the present application, optionally, the heat exchange component 200 includes a direct cooling and direct heating plate 210.

[0142] The heat exchange assembly 200 may only include the direct cooling and direct heating plate 210, the refrigerant inlet of the direct cooling and direct heating plate 210 is the refrigerant inlet of the heat exchange assembly 200, and the refrigerant outlet of the direct cooling and direct heating plate 210 is the refrigerant outlet of the heat exchange assembly 200. The heat exchange assembly 200 may also add other heat exchange components based on the direct cooling and direct heating plate 210.

[0143] The direct cooling and direct heating plate 210 is a plate with a refrigerant channel, which can be well fitted with the battery 12 to increase the heat exchange area, thereby improving the heat exchange efficiency with the battery 12 .

[0144] According to some embodiments of the present application, this embodiment provides a battery 12 thermal management method, which can be applied to the battery 12 thermal management system proposed in this application or any embodiment of the present application. Figure 9 As shown, Figure 9 A flow chart of a battery 12 thermal management method according to some embodiments of the present application is schematically shown. The battery 12 thermal management method includes:

[0145] Step S100 : According to the battery 12 being in a cooling condition, the first refrigerant flow path 310 and the third refrigerant flow path 330 are controlled to be connected, and the second refrigerant flow path 320 and the fourth refrigerant flow path 340 are controlled to be closed.

[0146] Step S200 : According to the battery 12 being in a heating condition, the second refrigerant flow path 320 and the fourth refrigerant flow path 340 are controlled to be connected, and the first refrigerant flow path 310 and the third refrigerant flow path 330 are controlled to be closed.

[0147] The thermal management method of the battery 12 in this embodiment can be executed by a controller. Figure 9 As shown, when the thermal management system of the battery 12 is in operation, step S01 is first executed: the working condition of the battery 12 is judged. Then, corresponding steps are executed according to the working condition of the battery 12. Among them, the working condition of the battery 12 includes at least the working condition that the battery 12 is in and needs to be heated and the working condition that the battery 12 is in and needs to be cooled. In some cases, the working condition of the battery 12 may also include the working condition that the temperature of the battery 12 is suitable and does not need to be cooled or heated. The judgment of the working condition of the battery 12 can be made by the controller based on the built-in program and the detection data obtained by the temperature sensor connected to the battery 12. For example, when the controller knows that the temperature of the battery 12 exceeds the maximum value of the preset temperature range based on the temperature sensor, the battery 12 is judged to be in a working condition that needs to be cooled. When the controller knows that the temperature of the battery 12 exceeds the minimum value of the preset temperature range based on the temperature sensor, the battery 12 is judged to be in a working condition that needs to be heated. The controller can also directly judge the working condition of the battery 12 through the input control signal, for example, manually input the working condition signal of the battery 12 that needs to be cooled, and the controller determines that the battery 12 is in a working condition that needs to be cooled based on the signal.

[0148] The control of the first refrigerant flow path 310, the second refrigerant flow path 320, the third refrigerant flow path 330, and the fourth flow path can be specifically achieved by controlling the first control valve group 910 and the second control valve group 920. As Figures 2 to 8 shown, when the battery 12 is in the cooling required condition, by controlling the first valve member 911 to be turned on, the second valve member 912 to be turned off, the third valve member 921 to be turned on, and the fourth valve member 922 to be turned off, the first refrigerant flow path 310 and the third refrigerant flow path 330 are made to communicate, and the second refrigerant flow path 320 and the fourth refrigerant flow path 340 are closed. In the case of having a fourth control group, the fifth valve member 941 is turned on and the sixth valve member 942 is turned off. At this time, the heat exchange assembly 200 is in the refrigeration state, and the refrigerant in the heat exchange assembly 200 can perform heat exchange with the battery 12 to take away the heat of the battery 12. When the battery 12 is in the heating required condition, by controlling the first valve member 911 to be turned off, the second valve member 912 to be turned on, the third valve member 921 to be turned off, and the fourth valve member 922 to be turned on, the second refrigerant flow path 320 and the fourth refrigerant flow path 340 are made to communicate, and the first refrigerant flow path 310 and the third refrigerant flow path 330 are closed. In the case of having a fourth control group, the fifth valve member 941 is turned off and the sixth valve member 942 is turned on. At this time, the heat exchange assembly 200 is in the heating state, and the refrigerant in the heat exchange assembly 200 can perform heat exchange with the battery 12 to provide heat to the battery 12.

[0149] In the battery 12 thermal management method of this embodiment, by controlling the first refrigerant flow path 310 and the second refrigerant flow path 320, and controlling the third refrigerant flow path 330 and the fourth refrigerant flow path 340, the battery 12 thermal management system can both heat the battery 12 and cool the battery 12, improving the temperature regulation ability of the battery 12.

[0150] According to some embodiments of the present application, optionally, the first refrigerant flow path 310 includes a first sub-flow path 311 and a second sub-flow path 312, and the battery 12 thermal management system further includes a fifth refrigerant flow path 350 and a third control valve group 930, as Figure 10 shown, Figure 10 schematically shows a flowchart of the battery 12 thermal management method according to some embodiments of the present application. The battery 12 thermal management method further includes:

[0151] Step S111: Control the fifth refrigerant flow path 350 to communicate according to that the required cooling amount of the battery 12 is less than the first reference cooling amount. Wherein, the first reference cooling amount is the first preset cooling amount, or the first reference cooling amount is the maximum cooling output amount of the heat exchange assembly 200 when the compressor 100 is in the minimum operating frequency state.

[0152] Step S112: Control the fifth refrigerant flow path 350 to be closed according to that the required cooling amount of the battery 12 is greater than or equal to the first reference cooling amount.

[0153] Steps S111 and S112 are steps when the battery 12 is in the working condition that needs to be cooled down. That is to say, when the opening degree of the flow rate regulating component 640 is the largest, the fifth refrigerant flow path 350 is closed, and the compressor 100 is in the working condition that the battery 12 needs to be cooled down and executes step S100, then based on the judgment of the required cooling amount of the battery 12, step S111 or step S112 is executed.

[0154] The required cooling amount of the battery 12 is the cooling amount required by the current state of the battery 12. It can be the temperature-related parameters of the current state of the battery 12 measured by a sensor, or the heat dissipation-related parameters calculated by the controller for the current state of the battery 12. The first preset cooling amount can be a cooling amount parameter preset in the control. It can be the temperature-related parameters of the battery 12, or the heat dissipation-related parameters, etc. Among them, the judgment of whether the required cooling amount of the battery 12 is higher than the first preset cooling amount can be made by the controller based on the built-in program and relevant measurement data, or the controller directly receives relevant control signals and realizes it through the judgment of the control signals.

[0155] When the compressor 100 is in the state of the minimum operating frequency, the maximum cooling output of the heat exchange component 200, that is, when the compressor 100 is started and running and in the state of the minimum operating frequency, and other variables of the battery 12 thermal management system are set to the maximum heat exchange amount, the maximum cooling amount that the heat exchange component 200 can reach. Specifically, when the compressor 100 is in the state of the minimum operating frequency, the maximum cooling output of the heat exchange component 200 can be calculated through the measurement data of the first detection component 610, the second detection component 620, and the third detection component 630 when the opening degree of the flow rate regulating component 640 is the largest, the fifth refrigerant flow path 350 is closed, and the compressor 100 is running at the minimum operating frequency. After this data is obtained, it can be stored in the controller in advance, and the controller compares the data with the required cooling amount of the battery 12 by calling the data.

[0156] It should be noted that when the maximum cooling output of the heat exchange component 200 is used as the first reference cooling amount in the state where the compressor 100 is at the minimum operating frequency, the operation process of the controller can also be as follows: The battery 12 thermal management system is operated at the state where the frequency of the compressor 100 is reduced to the lowest frequency, the opening degree of the flow rate regulating component 640 is the largest, and the fifth refrigerant flow path 350 is closed. In this state, the cooling output of the heat exchange component 200 in the current operating state is calculated through the measurement data of the first detection component 610, the second detection component 620, and the third detection component 630. If the cooling output is less than or equal to the cooling amount required by the battery 12 in the current state, it can be considered that the cooling amount required by the battery 12 is greater than or equal to the first reference cooling amount. If the cooling output is greater than the cooling amount required by the battery 12 in the current state, it can be considered that the cooling amount required by the battery 12 is less than the first reference cooling amount. That is to say, when the cooling amount required by the battery 12 is less than the heat exchange capacity of the heat exchange component 200 of the current battery 12 thermal management system, the power of the compressor 100 can be preferentially reduced to adjust the heat exchange capacity of the battery 12 thermal management system; when the compressor 100 has been reduced to the lowest frequency operation and still cannot meet the cooling amount required by the battery 12, the fifth refrigerant flow path 350 can be opened to further reduce the heat exchange capacity of the battery 12 thermal management system.

[0157] In the battery 12 thermal management method of this embodiment, when the battery 12 thermal management system is in the refrigeration working condition, that is, when the battery 12 is in the working condition of needing to be cooled, the on-off of the third control valve group 930 can be controlled to make the fifth refrigerant flow path 350 conduct or close. Among them, when the fifth refrigerant flow path 350 is closed, all the refrigerant in the battery 12 thermal management system flows to the heat exchange component 200, so that the heat exchange component 200 has a higher cooling capacity for the battery 12; when the cooling amount required by the battery 12 is low, the fifth refrigerant flow path 350 is painted, and part of the refrigerant in the battery 12 thermal management system is shunted to the fifth refrigerant flow path 350, and this part of the refrigerant returns to the compressor 100 through the evaporator 800. In this way, the refrigerant flowing to the heat exchange component 200 is reduced, and the cooling capacity of the heat exchange component 200 for the battery 12 is weakened.

[0158] When the battery 12 thermal management system is in the refrigeration working condition, by controlling the conduction or closing of the fifth refrigerant flow path 350, the cooling capacity of the heat exchange component 200 can be adjusted, so that the cooling capacity of the heat exchange component 200 can be adaptively allocated according to the cooling amount required by the battery 12, and the adaptability of the temperature control of the battery 12 is improved.

[0159] According to some embodiments of the present application, optionally, the battery 12 thermal management system further includes a medium supply device 810, and the battery 12 thermal management method further includes: according to the required cooling amount or the required heating amount of the battery 12, regulating the refrigerant flow rate flowing in the battery 12 thermal management system, the power of the compressor 100, and / or the heat exchange capacity of the medium of the medium supply device 810, so as to reduce or increase the output of the heat exchange assembly 200.

[0160] Among them, the required heating amount of the battery 12 is the heating amount required by the current state of the battery 12, which can be the temperature-related parameters of the current state of the battery 12 measured by a sensor, or the relevant parameters of the required heating heat of the current state of the battery 12 calculated by a controller.

[0161] In some embodiments, the heat exchange capacity of the battery 12 thermal management system can be regulated by comparing the cooling output of the heat exchange assembly 200 of the current battery 12 thermal management system with the required cooling amount of the battery 12. Specifically, when the heat exchange assembly 200 is in the refrigeration working condition, when the required cooling amount of the battery 12 is greater than the cooling output of the heat exchange assembly 200 of the current battery 12 thermal management system (i.e., the heat exchange capacity of the cooling output of the heat exchange assembly 200 of the current battery 12 thermal management system), the cooling capacity of the heat exchange assembly 200 can be improved by means of increasing the power of the compressor 100, increasing the refrigerant flow rate flowing in the battery 12 thermal management system, etc. In the current state, when the fifth refrigerant flow path 350 is in the conducting state, the fifth refrigerant flow path 350 can also be closed or the heat exchange capacity of the medium of the medium supply device 810 can be reduced to improve the cooling capacity of the heat exchange assembly 200. When the required cooling amount of the battery 12 is less than the heat exchange capacity of the heat exchange assembly 200 of the current battery 12 thermal management system, the cooling capacity of the heat exchange assembly 200 can be reduced by means of reducing the power of the compressor 100, reducing the refrigerant flow rate flowing in the battery 12 thermal management system, etc.; in the current state, when the fifth refrigerant flow path 350 is in the closed state, the fifth refrigerant flow path 350 can also be opened to reduce the cooling capacity of the heat exchange assembly 200; in the current state, when the fifth refrigerant flow path 350 is in the conducting state, the heat exchange capacity of the medium of the medium supply device 810 can also be increased to reduce the cooling capacity of the heat exchange assembly 200.

[0162] In some embodiments, under refrigeration conditions, when the cooling requirement of the battery 12 is less than the heat exchange capacity of the heat exchange component 200 of the current battery 12 thermal management system, the power of the compressor 100 can be preferentially reduced to adjust the heat exchange capacity of the battery 12 thermal management system; when the compressor 100 has been reduced to the lowest operating frequency and still cannot meet the cooling requirement of the battery 12, the fifth refrigerant flow path 350 can be opened to further reduce the heat exchange capacity of the battery 12 thermal management system; when the fifth refrigerant flow path 350 is opened and the capacity of the medium of the medium supply device 810 is at its maximum, and still cannot meet the cooling requirement of the battery 12, the refrigerant flow rate flowing in the battery 12 thermal management system can be reduced by adjusting the flow rate adjustment component 640 to further reduce the heat exchange capacity of the battery 12 thermal management system. When the cooling requirement of the battery 12 is greater than the heat exchange capacity of the heat exchange component 200 of the current battery 12 thermal management system, the priority adjustment is opposite to that when the cooling requirement of the battery 12 is less than the heat exchange capacity of the heat exchange component 200 of the current battery 12 thermal management system, that is, the flow rate adjustment component 640 is preferentially adjusted to increase the refrigerant flow rate flowing in the battery 12 thermal management system, then closing the fifth refrigerant flow path 350 is considered, and finally increasing the frequency of the compressor 100 is considered.

[0163] In some embodiments, the heating output of the heat exchange component 200 of the current battery 12 thermal management system can be compared with the heating requirement of the battery 12 to control the heat exchange capacity of the battery 12 thermal management system. Specifically, when the heat exchange component 200 is in the heating condition and the heating requirement of the battery 12 is greater than the heating output of the heat exchange component 200 of the current battery 12 thermal management system (i.e., the heat exchange capacity of the heat exchange component 200 of the current battery 12 thermal management system), the heating capacity of the heat exchange component 200 can be increased by means such as increasing the power of the compressor 100, increasing the refrigerant flow rate flowing in the battery 12 thermal management system, and increasing the heat exchange capacity of the medium of the medium supply device 810. When the heating requirement of the battery 12 is less than the heat exchange capacity of the heat exchange component 200 of the current battery 12 thermal management system, the heating capacity of the heat exchange component 200 can be reduced by means such as reducing the power of the compressor 100, reducing the refrigerant flow rate flowing in the battery 12 thermal management system, and reducing the heat exchange capacity of the medium of the medium supply device 810.

[0164] Among them, the heat exchange capacity of the heat exchange component 200 of the current battery 12 thermal management system, that is, the cooling output or heating output of the heat exchange component 200 of the current battery 12 thermal management system, can be obtained by measurement through the refrigerant flow rate flowing through the heat exchange component 200 detected by the first detection component 610, the temperature or pressure of the refrigerant inlet of the heat exchange component 200 detected by the second detection component 620, and the temperature or pressure of the refrigerant outlet of the heat exchange component 200 detected by the third detection component 630. The power of the compressor 100 can be achieved by adjusting the power of the motor of the compressor 100. The refrigerant flow rate flowing in the battery 12 thermal management system can be achieved by adjusting the flow rate adjustment component 640, that is, the throttle valve 641. The larger the opening of the flow rate adjustment component 640, the larger the refrigerant flow rate flowing in the battery 12 thermal management system.

[0165] The heat exchange capacity of the medium of the medium supply device can be achieved by regulating the flow rate of the medium and the heating power of the heating device 811 (i.e., the heating component 8112). Among them, the flow rate of the medium of the medium supply device 810 can be achieved by adjusting the power of the medium driving component 814. For example, when the medium driving component 814 is a water pump, the flow rate of the medium of the medium supply device 810 can be adjusted by adjusting the power of the water pump, so as to change the circulation amount of the medium flowing into the medium flow channel of the evaporator 800 per unit time. It can be understood that the larger the flow rate of the medium, the larger the circulation amount of the medium flowing into the medium flow channel of the evaporator 800 per unit time, and the higher the heat exchange efficiency that the evaporator 800 can perform. The heating power of the heating device 811 can be achieved by regulating the heating power of the heating component 8112. The larger the heating power of the heating component 8112, the more heat the refrigerant absorbs in the evaporator 800, and the higher the heat exchange efficiency of the evaporator 800.

[0166] In one embodiment, under the heating condition, when the required heating quantity of the battery 12 is less than the heat exchange capacity of the heat exchange component 200 of the current battery 12 thermal management system, the power of the compressor 100 can be preferentially reduced to adjust the heat exchange capacity of the battery 12 thermal management system; when the compressor 100 has been reduced to the lowest frequency operation and still cannot meet the required heating quantity of the battery 12, the heat exchange capacity of the medium of the medium supply device 810 can be reduced to further reduce the heat exchange capacity of the heat exchange component 200; if the heat exchange capacity of the medium of the medium supply device 810 reaches the lowest and still cannot meet the required heating quantity of the battery 12, the refrigerant flow rate flowing in the battery 12 thermal management system can be reduced by adjusting the flow rate adjustment component 640 to further reduce the heat exchange capacity of the battery 12 thermal management system. When the required heating quantity of the battery 12 is greater than the heat exchange capacity of the heat exchange component 200 of the current battery 12 thermal management system, the priority adjustment is opposite to that when the required heating quantity of the battery 12 is less than the heat exchange capacity of the heat exchange component 200 of the current battery 12 thermal management system, that is, the flow rate adjustment component 640 is preferentially adjusted to increase the refrigerant flow rate flowing in the battery 12 thermal management system, then the heat exchange capacity of the medium of the medium supply device 810 is considered to be increased, and finally the frequency of the compressor 100 is considered to be increased.

[0167] This embodiment can compare according to the required temperature reduction quantity of the battery 12 or according to the required heating quantity of the battery 12 and the heat exchange capacity of the heat exchange component 200 of the current battery 12 thermal management system, and adjust the heat exchange capacity of the battery 12 thermal management system, improving the temperature control ability of the battery 12 thermal management system for the battery 12, enabling the battery 12 to be maintained within a more appropriate temperature range, which is more friendly to the maintenance of the battery 12 performance.

[0168] According to some embodiments of the present application, optionally, as Figure 11 and Figure 12 shown, Figure 11 Schematically shows a flowchart of the battery 12 thermal management method of some embodiments of the present application when the battery 12 is in the temperature reduction required working condition, Figure 12 Schematically shows a flowchart of the battery 12 thermal management method of some embodiments of the present application when the battery 12 is in the temperature reduction required working condition; adjusting the refrigerant flow rate, the power of the compressor 100 and / or the heat exchange capacity of the medium of the medium supply device 810 flowing in the battery 12 thermal management system, including:

[0169] Step S121: Control the compressor 100 to operate within the first power range according to the required temperature reduction quantity of the battery 12 being greater than or equal to the second reference temperature reduction quantity. Wherein, the second reference temperature reduction quantity is the second preset temperature reduction quantity, or the second reference temperature reduction quantity is the maximum temperature reduction output of the heat exchange component 200.

[0170] Step S122: When the required cooling amount of the battery 12 is less than the second reference cooling amount, control the compressor 100 to operate within the second power range. The minimum value of the first power range is greater than or equal to the maximum value of the second power range, and the second reference cooling amount is greater than the first reference cooling amount.

[0171] As Figure 11 shown, step S121 and step S122 can be executed before step S111 and step S112. That is to say, when the required cooling amount of the battery 12 is less than the second reference cooling amount, then it is determined whether the required cooling amount of the battery 12 is less than the first reference cooling amount, and then corresponding steps are executed according to the determination result. As Figure 12 shown, step S121 and step S122 can also be executed in parallel with step S111 and step S112. That is, after step S100 is executed, it can be simultaneously determined whether the required cooling amount of the battery 12 is less than the first reference cooling amount and whether the required cooling amount of the battery 12 is less than the second reference cooling amount, and corresponding steps are executed.

[0172] The second preset cooling amount can be a cooling amount parameter preset in the control. It can be a temperature-related parameter of the battery 12 or a heat dissipation-related parameter, etc. Among them, the determination of whether the required cooling amount of the battery 12 is higher than the second preset cooling amount can be made by the controller based on the built-in program and relevant measurement data, or the controller can directly receive relevant control signals and make a determination through the judgment of the control signals.

[0173] The maximum cooling output of the heat exchange component 200 in this embodiment is the maximum cooling amount that the heat exchange component 200 can reach when all variables of the battery 12 thermal management system are set to the maximum heat exchange amount. Specifically, the maximum cooling output of the heat exchange component 200 in this embodiment can be calculated from the measurement data of the first detection component 610, the second detection component 620, and the third detection component 630 when the compressor 100 is at the maximum operating frequency, the opening of the flow regulation component 640 is the largest, and the fifth refrigerant flow path 350 is closed. After this data is obtained, it can be stored in the controller, and the controller compares the data with the required cooling amount of the battery 12 by calling the data.

[0174] It should be noted that when the maximum cooling output of the heat exchange component 200 in this embodiment is used as the second reference cooling amount, the operation process of the controller can also be to make the battery 12 thermal management system operate in a state where the frequency of the compressor 100 is adjusted to the highest frequency, the opening of the flow regulation component 640 is the largest, and the fifth refrigerant flow path 350 is closed. In this state, the cooling output of the heat exchange component 200 in the current operating state is calculated based on the measurement data of the first detection component 610, the second detection component 620, and the third detection component 630. If the cooling output is less than or equal to the cooling amount required by the battery 12 in the current state, it can be considered that the cooling amount required by the battery 12 is greater than or equal to the second reference cooling amount. If the cooling output is greater than the cooling amount required by the battery 12 in the current state, it can be considered that the cooling amount required by the battery 12 is less than the second reference cooling amount.

[0175] Since the second reference cooling amount is greater than the first reference cooling amount, when the cooling amount required by the battery 12 is less than the heat exchange capacity of the heat exchange component 200 of the current battery 12 thermal management system, the power of the compressor 100 can be preferentially reduced to adjust the heat exchange capacity of the battery 12 thermal management system; when the compressor 100 has been reduced to the lowest frequency operation and still cannot meet the cooling amount required by the battery 12, the fifth refrigerant flow path 350 can be opened to further reduce the heat exchange capacity of the battery 12 thermal management system. Conversely, when the cooling amount required by the battery 12 is greater than the heat exchange capacity of the heat exchange component 200 of the current battery 12 thermal management system, the fifth refrigerant flow path 350 can be preferentially closed to improve the heat exchange capacity between the battery 12 thermal management system and the battery 12.

[0176] It should be noted that both the lowest frequency and the highest frequency of the compressor 100 are the operating frequencies at which the compressor 100 can operate normally, and both the first power range and the second power range are also within the operating frequencies at which the compressor 100 can operate normally. The minimum value of the first power range can be the lowest operating frequency of the compressor 100, and the maximum value of the second power range can be the highest operating frequency of the compressor 100.

[0177] In this embodiment, by regulating the power of the compressor 100, the heat exchange capacity of the battery 12 thermal management system in the refrigeration industrial control can be regulated, improving the temperature regulation ability of the battery 12 thermal management system for the battery 12, enabling the battery 12 to be maintained within a more appropriate temperature range, which is more friendly to the maintenance of the battery 12 performance.

[0178] According to some embodiments of the present application, optionally, as Figure 11 and Figure 12 shown, regulating the refrigerant flow rate flowing in the battery 12 thermal management system, the power of the compressor 100, and / or the heat exchange capacity of the medium of the medium supply device 810 further includes:

[0179] Step S131: According to the required cooling amount of the battery 12 being greater than or equal to the third reference cooling amount, the refrigerant flowing in the battery 12 thermal management system flows at a first flow rate, and the first reference cooling amount is greater than the third reference cooling amount. Herein, the third reference cooling amount is the third preset cooling amount, or the third reference cooling amount is the maximum cooling output of the heat exchange assembly 200 when the compressor 100 is at the minimum operating frequency and the heat exchange capacity of the medium of the medium supply device 810 is in the maximum state;

[0180] Step S132: According to the required cooling amount of the battery 12 being less than the third reference cooling amount, the refrigerant flowing in the battery 12 thermal management system flows at a second flow rate, and the second flow rate is less than the first flow rate.

[0181] As Figure 11 shown, Step S131 and Step S132 can be executed after Step S111, that is to say, when the required cooling amount of the battery 12 is less than the first reference cooling amount, it is further determined whether the required cooling amount of the battery 12 is less than the third reference cooling amount, and then corresponding steps are executed according to the determination result. As Figure 12 shown, Step S131 and Step S132 can also be executed in parallel with Step S111, Step S112, Step S121 and Step S122, that is, after executing Step S100, it can be simultaneously determined whether the required cooling amount of the battery 12 is less than the first reference cooling amount, whether the required cooling amount of the battery 12 is less than the second reference cooling amount, and whether the required cooling amount of the battery 12 is less than the third reference cooling amount, and corresponding steps are executed.

[0182] The first flow rate is greater than the second flow rate, that is, when the required cooling amount of the battery 12 decreases, the flow rate of the refrigerant flowing in the battery 12 thermal management system can be adjusted downwards, and when the required cooling amount of the battery 12 increases, the flow rate of the refrigerant flowing in the battery 12 thermal management system can be adjusted upwards. More specifically, the maximum value of the first flow rate can be the maximum flow rate of the refrigerant flowing in the battery 12 thermal management system, and at this time, the opening degree of the flow rate regulating valve is the largest; the minimum value of the second flow rate can be the minimum flow rate of the refrigerant flowing in the battery 12 thermal management system, and at this time, the opening degree of the flow rate regulating valve is the smallest.

[0183] The third preset cooling amount can be a cooling amount parameter preset in the controller. It can be a temperature-related parameter of the battery 12 or a heat dissipation-related parameter, etc. Herein, for the determination of whether the required cooling amount of the battery 12 is higher than the third preset cooling amount, it can be determined by the controller based on the built-in program and relevant measurement data, or the controller directly receives relevant control signals and realizes it by judging the control signals.

[0184] The third reference cooling capacity in this embodiment is the maximum cooling output of the heat exchange assembly 200 when the compressor 100 is at the minimum operating frequency and the heat exchange capacity of the medium of the medium supply device 810 is at its maximum. Specifically, when the compressor 100 is at the minimum operating frequency, the medium driving assembly 814 is at its maximum power, and all other variables of the battery 12 thermal management system are set to the state with the maximum heat exchange amount, the maximum cooling capacity that the heat exchange assembly 200 can reach. Specifically, the maximum cooling output of the heat exchange assembly 200 in this embodiment can be calculated from the measurement data of the first detection assembly 610, the second detection assembly 620, and the third detection assembly 630 when the compressor 100 is at the minimum operating frequency, the fifth refrigerant flow path 350 is opened, the medium driving assembly 814 is at its maximum power, and the flow regulating assembly 640 has the maximum opening. After obtaining this data, it can be pre-stored in the controller, and the controller compares the called data with the required cooling capacity of the battery 12.

[0185] It should be noted that when the third reference cooling capacity in this embodiment is the maximum cooling output of the heat exchange assembly 200 when the compressor 100 is at the minimum operating frequency and the heat exchange capacity of the medium of the medium supply device 810 is at its maximum, the operation process of the controller can also be to make the battery 12 thermal management system operate in a state where the compressor 100 is at the minimum operating frequency, the fifth refrigerant flow path 350 is opened, the medium driving assembly 814 is at its maximum power, and the flow regulating assembly 640 has the maximum opening. In this state, the cooling output of the heat exchange assembly 200 in the current operating state is calculated from the measurement data of the first detection assembly 610, the second detection assembly 620, and the third detection assembly 630. If this cooling output is less than or equal to the required cooling capacity of the battery 12 in the current state, it can be considered that the required cooling capacity of the battery 12 is greater than or equal to the third reference cooling capacity. If this cooling output is greater than the required cooling capacity of the battery 12 in the current state, it can be considered that the required cooling capacity of the battery 12 is less than the third reference cooling capacity.

[0186] When the first reference cooling capacity is greater than the third reference cooling capacity, such that the required cooling capacity of the battery 12 is less than the heat exchange capacity of the heat exchange assembly 200 of the current battery 12 thermal management system, between adjusting the refrigerant flow rate flowing in the battery 12 thermal management system and opening the fifth refrigerant flow path 350, the fifth refrigerant flow path 350 is preferentially controlled to be opened to reduce the cooling capacity of the battery 12 thermal management system. On the contrary, when the required cooling capacity of the battery 12 is greater than the heat exchange capacity of the heat exchange assembly 200 of the current battery 12 thermal management system, the refrigerant flow rate flowing in the battery 12 thermal management system is preferentially increased to improve the heat exchange capacity between the battery 12 thermal management system and the battery 12.

[0187] In this embodiment, by regulating the flow rate of the refrigerant flowing in the thermal management system of the battery 12, the heat exchange capacity of the thermal management system of the battery 12 under the refrigeration condition can be regulated, the temperature regulation ability of the thermal management system of the battery 12 for the battery 12 is improved, so that the battery 12 can be maintained within a more appropriate temperature range, which is more friendly to the maintenance of the performance of the battery 12.

[0188] According to some embodiments of the present application, optionally, as Figure 13 shown, Figure 13 schematically shows a flowchart of the battery 12 thermal management method according to some embodiments of the present application when the battery 12 is in a heating required condition, Figure 14 schematically shows a flowchart of the battery 12 thermal management method according to some embodiments of the present application when the battery 12 is in a heating required condition. The battery 12 thermal management method further includes:

[0189] Step S211: Control the compressor 100 to operate within a third power range according to the heating amount required by the battery 12 being greater than or equal to the first reference heating amount. Wherein, the first reference heating amount is the first preset heating amount, or the first reference heating amount is the maximum heating output of the heat exchange component 200;

[0190] Step S212: Control the compressor 100 to operate within a fourth power range according to the heating amount required by the battery 12 being less than the first reference heating amount, and the minimum value of the third power range is greater than or equal to the maximum value of the fourth power range.

[0191] The first preset heating amount can be a heating amount parameter preset in the control, which can be a temperature-related parameter of the battery 12 or a heat dissipation-related parameter, etc. Among them, the judgment on whether the heating amount required by the battery 12 is higher than the first preset heating amount can be made by the controller based on the built-in program and relevant measurement data, or the controller directly receives relevant control signals and makes a judgment through the control signals.

[0192] The maximum heating output of the heat exchange component 200 in this embodiment is the maximum heating amount that the heat exchange component 200 can reach when all variables of the thermal management system of the battery 12 are set to the maximum heat exchange. Specifically, the maximum heating output of the heat exchange component 200 in this embodiment can be calculated from the measurement data of the first detection component 610, the second detection component 620, and the third detection component 630 when the compressor 100 is at the maximum operating frequency, the opening of the flow rate adjustment component 640 is the largest, and the power of the medium driving component 814 is the largest. After obtaining this data, it can be stored in the controller in advance, and the controller compares the data with the heating amount required by the battery 12 by calling the data.

[0193] It should be noted that when the maximum heating output of the heat exchange component 200 in this embodiment is used as the first reference heating amount, the operation process of the controller can also be to make the battery 12 thermal management system operate in a state where the frequency of the compressor 100 is adjusted to the highest frequency, the opening of the flow rate adjustment component 640 is the largest, and the power of the medium driving component 814 is the largest. In this state, the heating output of the heat exchange component 200 in the current operating state is calculated through the measurement data of the first detection component 610, the second detection component 620, and the third detection component 630. If the heating output is less than or equal to the heating amount required by the battery 12 in the current state, it can be considered that the heating amount required by the battery 12 is greater than or equal to the second reference heating amount. If the heating output is greater than the heating amount required by the battery 12 in the current state, it can be considered that the heating amount required by the battery 12 is less than the second reference heating amount.

[0194] The minimum value of the third power range can be the lowest operating frequency of the compressor 100, and the maximum value of the fourth power range can be the highest operating frequency of the compressor 100. The third power range can be the same as or different from the first power range, and the second power range can be the same as or different from the fourth power range.

[0195] In this embodiment, by controlling the power of the compressor 100, the heat exchange capacity of the battery 12 thermal management system in the heating industrial control can be regulated, improving the temperature regulation ability of the battery 12 thermal management system for the battery 12, so that the battery 12 can be maintained within a more appropriate temperature range, which is more friendly to maintaining the performance of the battery 12.

[0196] According to some embodiments of the present application, optionally, in combination Figure 13 and Figure 14 as shown, the battery 12 thermal management system further includes a medium supply device 810, and the battery 12 thermal management method further includes:

[0197] Step S221: According to the heating amount required by the battery 12 being greater than or equal to the second reference heating amount, control the medium of the medium supply device 810 to flow at a first flow rate and / or the heating device 811 to operate at a first heating power, and the second reference heating amount is less than the first reference heating amount. Wherein, the second reference heating amount is the second preset heating amount, or the second reference heating amount is the maximum heating output of the heat exchange component 200 when the compressor 100 is in the minimum operating frequency state;

[0198] Step S222: According to the heating amount required by the battery 12 being less than the second reference heating amount, control the medium of the medium supply device 810 to flow at a second flow rate, and / or the heating device 811 to operate at a second heating power, and the second flow rate is less than the first flow rate.

[0199] As Figure 13As shown, step S221 and step S222 can be executed after step S212, that is, when the required heating amount of the battery 12 is less than the first reference heating amount, it is further determined whether the required heating amount of the battery 12 is less than the second reference heating amount, and then corresponding steps are executed according to the determination result. As Figure 14 shown, step S221 and step S222 can also be executed in parallel with step S211 and step S212, that is, after executing step S200, it can be simultaneously determined whether the required heating amount of the battery 12 is less than the first reference heating amount and whether the required heating amount of the battery 12 is less than the second reference heating amount, and corresponding steps are executed.

[0200] The second preset heating amount can be a heating amount parameter preset in the controller. It can be a temperature-related parameter of the battery 12 or a heat dissipation-related parameter, etc. Among them, the determination of whether the required heating amount of the battery 12 is higher than the second preset heating amount can be made by the controller based on the built-in program and relevant measurement data, or the controller can directly receive relevant control signals and make a determination through the control signals.

[0201] When the compressor 100 is in the state of the minimum operating frequency, the maximum heating output of the heat exchange component 200, that is, when the compressor 100 is started and operates at the minimum operating frequency, and other variables of the battery 12 thermal management system are set to the maximum heat exchange amount, the maximum heating amount that the heat exchange component 200 can reach. Specifically, when the compressor 100 is in the state of the minimum operating frequency, the maximum heating output of the heat exchange component 200 can be calculated through the measurement data of the first detection component 610, the second detection component 620, and the third detection component 630 when the opening of the flow regulating component 640 is the largest, the fifth refrigerant flow path 350 is closed, and the compressor 100 operates at the minimum operating frequency. After obtaining this data, it can be pre-stored in the controller, and the controller compares the data with the required heating amount of the battery 12 by calling the data.

[0202] It should be noted that when the maximum heating output of the heat exchange component 200 in the state where the compressor 100 is at the minimum operating frequency is used as the second reference heating amount, the operation process of the controller can also be: making the battery 12 thermal management system operate in a state where the frequency of the compressor 100 is reduced to the lowest frequency, the opening of the flow rate adjustment component 640 is the largest, and the fifth refrigerant flow path 350 is closed. In this state, the heating output of the heat exchange component 200 in the current operating state is calculated through the measurement data of the first detection component 610, the second detection component 620, and the third detection component 630. If the heating output is less than or equal to the heating amount required by the battery 12 in the current state, it can be considered that the heating amount required by the battery 12 is greater than or equal to the second reference heating amount. If the heating output is greater than the heating amount required by the battery 12 in the current state, it can be considered that the heating amount required by the battery 12 is less than the second reference heating amount.

[0203] When the second reference heating amount is less than the first reference heating amount, such that the heating amount required by the battery 12 is less than the heat exchange capacity of the heat exchange component 200 of the current battery 12 thermal management system, the power of the compressor 100 can be preferentially reduced to adjust the heat exchange capacity of the battery 12 thermal management system; when the compressor 100 has been reduced to the lowest frequency operation and still cannot meet the heating amount required by the battery 12, the power of the medium driving component 814 can be reduced to reduce the flow rate of the medium, thereby further reducing the heat exchange capacity of the heat exchange component 200; the heating power of the heating component 8112 can also be reduced to reduce the temperature of the medium, thereby further reducing the heat exchange capacity of the heat exchange component 200. On the contrary, when the heating amount required by the battery 12 is greater than the heat exchange capacity of the heat exchange component 200 of the current battery 12 thermal management system, the power of the medium driving component 814 can be preferentially increased to increase the flow rate of the medium, thereby increasing the heat exchange capacity between the battery 12 thermal management system and the battery 12.

[0204] The first flow rate is greater than the second flow rate, and / or the first heating power is less than the second heating power. That is, when the heating amount required by the battery 12 decreases, the heat exchange capacity of the medium of the medium supply device 810 can be reduced, and when the heating amount required by the battery 12 increases, the heat exchange capacity of the medium of the medium supply device 810 can be increased. More specifically, the maximum value of the first flow rate can be the maximum value of the flow rate of the medium of the medium supply device 810, at this time the power of the medium driving component 814 is the largest; the minimum value of the first flow rate can be the minimum value of the flow rate of the medium of the medium supply device 810, at this time the power of the medium driving component 814 is the smallest. The maximum value of the first heating power can be the maximum heating power of the heating component 8112, and the minimum value of the second heating power can be the minimum heating power of the heating component 8112.

[0205] In this embodiment, by regulating the heat exchange capacity of the medium of the supply device, the heat exchange capacity of the battery 12 thermal management system under the heating industrial control can be regulated, improving the temperature regulation ability of the battery 12 thermal management system for the battery 12, so that the battery 12 can be maintained within a more appropriate temperature range, which is more friendly to maintaining the performance of the battery 12.

[0206] According to some embodiments of the present application, optionally, in combination with Figure 13 and Figure 14 as shown, the battery 12 thermal management method further includes:

[0207] Step S231: When the required heating amount of the battery 12 is greater than or equal to the third reference heating amount, control the refrigerant flowing in the battery 12 thermal management system to flow at a third flow rate. The third reference heating amount is less than the second reference heating amount. The third reference heating amount is the third preset heating amount, or the third reference heating amount is the maximum heating output of the heat exchange component 200 when the compressor 100 is at the minimum operating frequency and the heat exchange capacity of the medium of the medium supply device 810 is in the minimum state.

[0208] Step S232: When the required heating amount of the battery 12 is less than the third reference heating amount, control the refrigerant flowing in the battery 12 thermal management system to flow at a fourth flow rate, and the fourth flow rate is less than the third flow rate.

[0209] The third flow rate is greater than the fourth flow rate. That is, when the required heating amount of the battery 12 decreases, the flow rate of the refrigerant flowing in the battery 12 thermal management system can be reduced, and when the required heating amount of the battery 12 increases, the flow rate of the refrigerant flowing in the battery 12 thermal management system can be increased. More specifically, the maximum value of the third flow rate can be the maximum flow rate of the refrigerant flowing in the battery 12 thermal management system, and at this time, the opening of the flow rate regulating valve is the largest; the minimum value of the fourth flow rate can be the minimum flow rate of the refrigerant flowing in the battery 12 thermal management system, and at this time, the opening of the flow rate regulating valve is the smallest. The values of the first flow rate and the third flow rate can be the same or different, and the values of the second flow rate and the fourth flow rate can be the same or different.

[0210] As Figure 13 shown, step S231 and step S232 can be executed after step S222, that is, when the required heating amount of the battery 12 is less than the second reference heating amount, then it is judged whether the required heating amount of the battery 12 is less than the third reference heating amount, and then corresponding steps are executed according to the judgment result. As Figure 14As shown, step S231 and step S232 can also be executed in parallel with step S211, step S212, step S221, and step S222. That is, after executing step S100, it is possible to simultaneously determine whether the required heating amount of battery 12 is less than the first reference heating amount, whether the required heating amount of battery 12 is less than the second reference heating amount, and whether the required heating amount of battery 12 is less than the third reference heating amount, and execute the corresponding steps.

[0211] The third preset heating amount can be a heating amount parameter pre-set in the controller. It can be a temperature-related parameter of battery 12 or a heat dissipation-related parameter, etc. Among them, the determination of whether the required heating amount of battery 12 is higher than the third preset heating amount can be made by the controller based on built-in programs and relevant measurement data calculations, or the controller can directly receive relevant control signals and make a determination through the judgment of the control signals.

[0212] In this embodiment, the third reference heating amount is the maximum heating output of the heat exchange component 200 when the compressor 100 is at the minimum operating frequency and the heat exchange capacity of the medium of the medium supply device 810 is in the minimum state. Specifically, when the compressor 100 is at the minimum operating frequency and the medium driving component 814 is at the minimum power, and other variables of the battery 12 thermal management system are set to the maximum heat exchange amount, the maximum heating amount that the heat exchange component 200 can reach. Specifically, the maximum heating output of the heat exchange component 200 in this embodiment can be calculated from the measurement data of the first detection component 610, the second detection component 620, and the third detection component 630 when the compressor 100 is at the minimum operating frequency, the medium driving component 814 is at the minimum power, and the flow rate regulating component 640 has the maximum opening. After obtaining this data, it can be pre-stored in the controller, and the controller compares the data with the required heating amount of battery 12 by calling the data.

[0213] It should be noted that when the third reference heating amount in this embodiment is the maximum heating output of the heat exchange component 200 when the compressor 100 is at the minimum operating frequency and the heat exchange capacity of the medium of the medium supply device 810 is in the minimum state, the operation process of the controller can also be to make the battery 12 thermal management system operate in a state where the compressor 100 is at the minimum operating frequency, the medium driving component 814 is at the minimum power, and the flow rate regulating component 640 has the maximum opening. In this state, the heating output of the heat exchange component 200 in the current operating state is calculated from the measurement data of the first detection component 610, the second detection component 620, and the third detection component 630. If the heating output is less than or equal to the required heating amount of battery 12 in the current state, it can be considered that the required heating amount of battery 12 is greater than or equal to the third reference heating amount. If the heating output is greater than the required heating amount of battery 12 in the current state, it can be considered that the required heating amount of battery 12 is less than the third reference heating amount.

[0214] When the second reference heating amount is greater than the third reference heating amount, such that the required heating amount of the battery 12 is less than the heat exchange capacity of the heat exchange component 200 of the current battery 12 thermal management system, between adjusting the refrigerant flow rate flowing in the battery 12 thermal management system and adjusting the heat exchange capacity of the medium of the medium supply device 810, the heat exchange capacity of the medium of the medium supply device 810 is preferentially reduced to reduce the heating amount of the battery 12 thermal management system. Conversely, when the required heating amount of the battery 12 is greater than the heat exchange capacity of the heat exchange component 200 of the current battery 12 thermal management system, the refrigerant flow rate flowing in the battery 12 thermal management system is preferentially increased to improve the heat exchange capacity of the battery 12 thermal management system with the battery 12.

[0215] In this embodiment, by regulating the refrigerant flow rate flowing in the battery 12 thermal management system, the heat exchange capacity of the battery 12 thermal management system under the heating condition can be regulated, improving the temperature regulation ability of the battery 12 thermal management system for the battery 12, such that the battery 12 can be maintained within a more appropriate temperature range, which is more friendly to maintaining the performance of the battery 12.

[0216] Some embodiments of the present application further provide an electrical device, including the battery 12 and the battery 12 thermal management system proposed in the present application or any embodiment of the present application, and the battery 12 is connected to the heat exchange component 200.

[0217] The electrical device can be any of the above electrical devices.

[0218] Some embodiments of the present application further provide an energy storage device 10, including the battery 12 and the battery 12 thermal management system proposed in the present application or any embodiment of the present application, and the battery 12 is connected to the heat exchange component 200.

[0219] The energy storage device 10 can be any of the above energy storage devices 10.

[0220] As Figures 6 to 8 shown, this embodiment provides a battery 12 thermal management system, which includes a compressor 100, a heat exchange component 200, a first refrigerant flow path 310, a second refrigerant flow path 320, a third refrigerant flow path 330, a fourth refrigerant flow path 340, a condenser 700, an evaporator 800, a first control valve group 910, a second control valve group 920, a fifth refrigerant flow path 350, a third control valve group 930, a fourth control valve group 940, a first expansion valve 410, a second expansion valve 420, a first detection component 610, a second detection component 620, a third detection component 630, a subcooler 500, and a liquid receiver 710.

[0221] Among them, the heat exchange component 200 is used for heat exchange with the battery 12, and the heat exchange component 200 is a direct cooling and direct heating plate 210. The first refrigerant flow path 310 includes a first sub-flow path 311 and a second sub-flow path 312. The first sub-flow path 311 is connected between the refrigerant outlet of the compressor 100 and the refrigerant inlet of the condenser 700. The second sub-flow path 312 is connected between the refrigerant outlet of the condenser 700 and the refrigerant inlet of the heat exchange component 200. The refrigerant inlet of the fifth refrigerant flow path 350 is communicated with the second sub-flow path 312, and the refrigerant outlet of the fifth refrigerant flow path 350 is connected to the refrigerant inlet of the evaporator 800. The third control valve group 930 is arranged on the fifth refrigerant flow path 350 and is adapted to control the fifth refrigerant flow path 350 to be conducted or disconnected.

[0222] Specifically, the second sub-flow path 312 includes a first pipe section 313 and a second pipe section 314. The second pipe section 314 is connected between the refrigerant outlet of the condenser 700 and the refrigerant inlet of the subcooler 500. The first pipe section 313 is connected between the refrigerant outlet of the subcooler 500 and the refrigerant inlet of the first expansion valve 410. The inlet of the fifth refrigerant flow path 350 is arranged between the first expansion valve 410 and the condenser 700. The first control valve group 910 includes a first valve member 911 arranged on the first sub-flow path 311 and a second valve member 912 arranged on the third sub-flow path 321, and is adapted to control the first sub-flow path 311 and the third sub-flow path 321 to be selectively conducted. The second control valve group 920 includes a third valve member 921 arranged on the third refrigerant flow path 330 and a fourth valve member 922 arranged on the fourth refrigerant flow path 340, and is adapted to selectively conduct one of the first refrigerant flow path 310 and the second refrigerant flow path 320. The fourth control valve group 940 includes a fifth valve member 941 arranged on the first pipe section 313 and a sixth valve member 942 arranged on the fourth sub-flow path 322, and is adapted to selectively connect the fourth sub-flow path 322 and the first pipe section 313.

[0223] The second expansion valve 420 is arranged on the fourth refrigerant flow path 340 and is located between the refrigerant outlet of the heat exchange component 200 and the refrigerant inlet of the evaporator 800. The refrigerant outlet of the fifth refrigerant flow path 350 is communicated with the refrigerant inlet of the second expansion valve 420.

[0224] The refrigerant inlet and / or outlet of the heat exchange assembly 200 is / are connected to the first detection assembly 610, and the first detection assembly 610 is adapted to detect the refrigerant flow rate flowing through the heat exchange assembly 200. The first detection assembly 610 is connected to the first refrigerant flow path 310 and the fourth refrigerant flow path 340. The battery 12 thermal management system further includes a second detection assembly 620 and a third detection assembly 630. The second detection assembly 620 is disposed at the refrigerant inlet of the heat exchange assembly 200, and the third detection assembly 630 is disposed at the refrigerant outlet of the heat exchange assembly 200. The second detection assembly 620 and the third detection assembly 630 are respectively adapted to detect the refrigerant pressure at the refrigerant inlet and outlet of the heat exchange assembly 200, and the second detection assembly 620 and the third detection assembly 630 are respectively adapted to detect the refrigerant temperature at the refrigerant inlet and outlet of the heat exchange assembly 200.

[0225] A throttle valve 641 is provided at the refrigerant inlet of the compressor 100, and the throttle valve 641 is adapted to regulate the refrigerant flow rate flowing through the compressor 100.

[0226] The evaporator 800 includes a refrigerant flow channel and a medium flow channel that exchange heat with each other. The refrigerant flow channel is connected to the refrigerant inlet and outlet of the evaporator 800;

[0227] The battery 12 thermal management system further includes a medium supply device 810. The medium supply device 810 includes a heating device 811, a first medium pipeline 812, a second medium pipeline 813, and a medium driving component 814. The heating device 811 is adapted to heat the medium flowing through the heating device 811. The medium inlet of the heating device 811 is connected to the medium outlet of the medium flow channel through the first medium pipeline 812, and the medium outlet of the heating device 811 is connected to the medium inlet of the medium flow channel through the second medium pipeline 813. The medium driving component 814 is used to drive the medium to flow, and the medium driving component 814 is provided on the first medium pipeline 812 and / or the second medium pipeline 813. The medium driving component 814 is a water pump, and the medium is water.

[0228] The accumulator 710 is disposed on the flow path between the condenser 700 and the subcooler 500. A first check valve 361 is provided on the first refrigerant flow path 310, a second check valve 362 is provided on the fourth refrigerant flow path 340, a third check valve 363 is provided on the first pipe section 313, and a fourth check valve 364 is provided on the fifth sub-flow path 341. A stop valve 950 can also be provided before and after the heat exchange assembly 200. In the case of closing the stop valve 950, the heat exchange assembly 200 can be replaced. A gas-liquid separator 720 can also be provided between the throttle valve 641 and the refrigerant outlet of the compressor 100 to improve the operating stability of the battery thermal management system.

[0229] As Figure 7As shown, when the battery 12 thermal management system is in the refrigeration mode, that is, when the battery 12 is in the condition of needing to be cooled down, the refrigerant in the state of high-temperature gas discharged by the compressor 100 can enter the condenser 700 through the first valve member 911 for cooling and condensation. The condensed refrigerant in the liquid state enters the liquid receiver 710. The liquid refrigerant is further cooled to the subcooled liquid state through the subcooler 500, and then flows into the first detection component 610 after passing through the fifth valve member 941. The first detection component 610 detects the mass flow rate of the refrigerant. The refrigerant is then throttled by the first expansion valve 410 into a two-phase flow gas-liquid mixture with low temperature and low pressure, and undergoes evaporation and heat absorption through the direct cooling and direct heating plate 210. After the refrigerant becomes superheated gas through heat absorption, it passes through the fourth valve member 922 and the throttle valve 641 to further throttle the refrigerant gas. After the pressure is further reduced, it returns to the compressor 100.

[0230] As Figure 11 As shown, under the refrigeration mode, the battery 12 thermal management system adjusts the refrigeration load mainly in the following ways: (1) When the system's refrigeration demand is the largest, the compressor 100 operates at the maximum frequency, the water pump is turned off, the medium supply device 810 has no output, the throttle valve 641 is fully open, and the third control valve group 930 is closed, and the heating capacity of the unit is the largest; (2) When the system's refrigeration demand decreases, the operating frequency of the compressor 100 is preferentially reduced. The minimum frequency of the compressor 100 can be 20% of the maximum operating frequency, and the refrigeration capacity of the unit decreases; (3) When the system's refrigeration demand further decreases, the third control valve group 930 is opened, and part of the refrigerant is diverted to the evaporator 800. The water pump operates at the maximum speed and the output of the heating component 8112 increases. The double evaporator 800 of the unit operates, and the refrigeration capacity of the direct cooling and heating plate further decreases; (4) When the system's refrigeration demand further decreases, the third control valve group 930 is opened, and part of the refrigerant continues to be diverted to the water-cooled evaporator 800, so as to reduce the refrigeration capacity of the direct cooling and direct heating plate 210. At the same time, when the load of the direct cooling and direct heating plate 210 further decreases, the system will close the throttle valve 641 to throttle the gas, thereby reducing the suction pressure, reducing the suction density, and thus reducing the circulation volume of the refrigerant in the whole system, so as to achieve the effect of reducing the refrigeration capacity of the system.

[0231] More specifically, taking the maximum heat generation of the battery 12 of the energy storage device 10 as 40 kilowatts as an example, when the required cooling capacity during the charging and discharging process of the battery 12 (the required cooling capacity is the required temperature reduction of the battery 12) is 90% to 100% of the maximum cooling capacity (the maximum cooling capacity is the maximum temperature reduction output of the thermal management system of the battery 12), the compressor 100 operates at the maximum frequency of 100 hertz; when the required cooling capacity becomes 50% to 90% of the maximum cooling capacity, the compressor 100 adjusts the refrigeration output capacity of the system by reducing the frequency until the compressor 100 is reduced to the lowest operating frequency of 20 hertz; when the required cooling capacity becomes 30% - 50% of the maximum cooling capacity, the system further adjusts the output capacity of the direct cooling and direct heating plate 210 by starting to parallel the evaporator 800 until the demand is met.

[0232] For example Figure 8 When the thermal management system of the battery 12 is in the heating working condition, that is, when the battery 12 is in the condition of needing to be heated, the high-temperature gas discharged by the compressor 100 enters the second valve member 912, and further enters the subcooler 500 to be cooled into saturated gas. After passing through the sixth valve member 942, it enters the direct cooling and direct heating plate 210 to heat the battery 12. At the same time, the refrigerant is condensed into a liquid state. After the mass flow rate is detected by the first detection component 610, the refrigerant passes through the fourth valve member 922 and the second expansion valve 420 to be throttled into a two-phase flow gas-liquid mixture with low temperature and low pressure. The evaporator 800 evaporates and absorbs heat. After the refrigerant absorbs heat and becomes superheated gas, it is further throttled by the throttle valve 641, and the refrigerant pressure is further reduced and then returns to the compressor 100.

[0233] For example Figure 13 As shown, the thermal management system of the battery 12 mainly adjusts the heating load through the following measures: (1) When the heating demand of the system is the largest, the compressor 100 operates at the maximum frequency, the water pump operates at full speed, the heating component 8112 outputs the maximum, the throttle valve 641 is in the fully open state, and the heating capacity of the unit is the largest; (2) When the heating demand of the system decreases, the operating frequency of the compressor 100 is preferentially reduced. The minimum frequency of the compressor 100 can be 20% of the maximum operating frequency, and the heating capacity of the unit decreases; (3) When the heating demand of the system further decreases, the operating speed of the water pump and the output of the water heating component 8112 are reduced, the evaporation temperature of the unit decreases, and the heating capacity further decreases; (4) When the heating demand of the system further decreases, the throttle valve 641 is further closed. The throttle valve 641 throttles the gas, the suction pressure further decreases, the system circulation volume further decreases, thereby reducing the refrigerant circulation volume of the entire system, and further reducing the heating capacity of the unit.

[0234] It should be noted that Figures 2 to 8 the arrows in represent the flow direction of the refrigerant.

[0235] The descriptions of the various embodiments above tend to emphasize the differences between the various embodiments. For the similarities or resemblances among them, reference can be made to each other. For the sake of brevity, they will not be elaborated herein again.

[0236] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery thermal management system, characterized in that, Comprising: A compressor; A heat exchange component for performing heat exchange with a battery; A first refrigerant flow path connecting the refrigerant inlet of the heat exchange component to the refrigerant outlet of the compressor; A second refrigerant flow path connecting the refrigerant inlet of the heat exchange component to the refrigerant outlet of the compressor; A third refrigerant flow path connecting the refrigerant outlet of the heat exchange component to the refrigerant inlet of the compressor; A fourth refrigerant flow path connecting the refrigerant outlet of the heat exchange component to the refrigerant inlet of the compressor; A condenser disposed in the first refrigerant flow path; An evaporator disposed in the fourth refrigerant flow path; A first control valve group connected to the first refrigerant flow path and the second refrigerant flow path, adapted to selectively conduct either the first refrigerant flow path or the second refrigerant flow path; A second control valve group connected to the third refrigerant flow path and the fourth refrigerant flow path, the second control valve group being adapted to selectively conduct either the third refrigerant flow path or the fourth refrigerant flow path.

2. The battery thermal management system according to claim 1, wherein, The first refrigerant flow path includes a first sub-flow path and a second sub-flow path. The first sub-flow path is connected between the refrigerant outlet of the compressor and the refrigerant inlet of the condenser, and the second sub-flow path is connected between the refrigerant outlet of the condenser and the refrigerant inlet of the heat exchange component; The battery thermal management system further includes a fifth refrigerant flow path and a third control valve group. The refrigerant inlet of the fifth refrigerant flow path is communicated with the second sub-flow path, the refrigerant outlet of the fifth refrigerant flow path is connected to the refrigerant inlet of the evaporator, and the third control valve group is disposed on the fifth refrigerant flow path and is adapted to control the fifth refrigerant flow path to be conducted or disconnected.

3. The battery thermal management system according to claim 2, characterized in that, A first expansion valve is further disposed on the second sub-flow path, and the inlet of the fifth refrigerant flow path is disposed between the first expansion valve and the condenser.

4. The battery thermal management system according to claim 3, wherein, The battery thermal management system further includes a subcooler. The subcooler is communicated in the second sub-flow path and is located between the condenser and the first expansion valve, and / or the subcooler is communicated in the second refrigerant flow path.

5. The battery thermal management system according to claim 4, wherein, The second refrigerant flow path includes a third sub-flow path and a fourth sub-flow path. The third sub-flow path is connected between the refrigerant outlet of the compressor and the refrigerant inlet of the subcooler, and the fourth sub-flow path is connected between the refrigerant outlet of the subcooler and the refrigerant inlet of the heat exchange component; The second sub-flow path includes a first pipe section and a second pipe section. The second pipe section is connected between the refrigerant outlet of the condenser and the refrigerant inlet of the subcooler, and the first pipe section is connected between the refrigerant outlet of the subcooler and the refrigerant inlet of the first expansion valve; The first control valve group is connected to and communicates the first sub-flow path and the third sub-flow path, and is used to control the selective connection of the first sub-flow path and the third sub-flow path. The battery thermal management system further includes a fourth control valve group. The fourth control valve group is connected to the first pipe section and the fourth sub-flow path and is adapted to selectively connect either the fourth sub-flow path or the first pipe section.

6. The battery thermal management system according to claim 5, characterized in that, The first control valve group includes a first valve member disposed on the first sub-flow path and a second valve member disposed on the third sub-flow path; And / or, the second control valve group includes a third valve member disposed in the third refrigerant flow path and a fourth valve member disposed in the fourth refrigerant flow path; And / or, the fourth control valve group includes a fifth valve member disposed on the first pipe section and a sixth valve member disposed on the fourth sub-flow path.

7. The battery thermal management system according to claim 2, wherein The battery thermal management system further includes a second expansion valve, which is disposed on the fourth refrigerant flow path and is located between the refrigerant outlet of the heat exchange component and the refrigerant inlet of the evaporator, and the refrigerant outlet of the fifth refrigerant flow path is communicated with the refrigerant inlet of the second expansion valve.

8. The battery thermal management system according to claim 1, wherein The battery thermal management system further includes a first detection component, the refrigerant inlet and / or the refrigerant outlet of the heat exchange component are communicated with the first detection component, and the first detection component is adapted to detect the refrigerant flow rate flowing through the heat exchange component.

9. The battery thermal management system according to claim 8, characterized in that, The first detection component is communicated with the first refrigerant flow path and the fourth refrigerant flow path.

10. The battery thermal management system according to claim 8, wherein, The battery thermal management system further includes a second detection component and a third detection component. The second detection component is disposed at the refrigerant inlet of the heat exchange component, and the third detection component is disposed at the refrigerant outlet of the heat exchange component. The second detection component and the third detection component are respectively adapted to detect the refrigerant pressure at the refrigerant inlet and the refrigerant outlet of the heat exchange component, and / or, the second detection component and the third detection component are respectively adapted to detect the refrigerant temperature at the refrigerant inlet and the refrigerant outlet of the heat exchange component.

11. The battery thermal management system according to any one of claims 1-10, characterized in that, The battery thermal management system further includes a flow rate adjustment component, and the flow rate adjustment component is disposed at the refrigerant inlet of the compressor, and the flow rate adjustment component is adapted to adjust the refrigerant flow rate flowing through the compressor.

12. The battery thermal management system according to claim 11, characterized in that, The flow rate adjustment component includes a throttle valve.

13. The battery thermal management system according to any one of claims 1-10, characterized in that, The evaporator includes a refrigerant flow channel and a medium flow channel that exchange heat with each other, and the refrigerant flow channel is communicated with the refrigerant inlet and the refrigerant outlet of the evaporator; The battery thermal management system further includes a medium supply device, and the medium supply device includes a heating device, a first medium pipeline, a second medium pipeline, and a medium driving component. The heating device is adapted to heat the medium flowing through the heating device. The medium inlet of the heating device is connected to the medium outlet of the medium flow channel through the first medium pipeline, and the medium outlet of the heating device is connected to the medium inlet of the medium flow channel through the second medium pipeline. The medium driving component is used to drive the medium to flow, and the medium driving component is disposed on the first medium pipeline and / or the second medium pipeline.

14. The battery thermal management system according to any one of claims 1-10, characterized in that, The heat exchange component includes a direct cooling and direct heating plate.

15. A battery thermal management method, applied to the battery thermal management system according to any one of claims 1-14, characterized in that According to the battery being in a cooling required working condition, control the first refrigerant flow path and the third refrigerant flow path to be conducted, and the second refrigerant flow path and the fourth refrigerant flow path to be closed; According to the battery being in a heating required working condition, control the second refrigerant flow path and the fourth refrigerant flow path to be conducted, and the first refrigerant flow path and the third refrigerant flow path to be closed.

16. The battery thermal management method according to claim 15, wherein The battery thermal management system further includes a fifth refrigerant flow path, and the battery thermal management method further includes: Control the opening or closing of the fifth refrigerant flow path according to the amount of cooling required by the battery.

17. The battery thermal management method according to claim 16, wherein When the amount of cooling required by the battery is less than the first reference cooling amount, control the fifth refrigerant flow path to be opened. The first reference cooling amount is a first preset cooling amount, or the first reference cooling amount is the maximum cooling output of the heat exchange component when the compressor is in the minimum operating frequency state. When the amount of cooling required by the battery is greater than or equal to the first reference cooling amount, control the fifth refrigerant flow path to be closed.

18. The battery thermal management method according to claim 17, wherein The battery thermal management system further includes a medium supply device. The battery thermal management method further includes: regulating the refrigerant flow rate flowing in the battery thermal management system, the power of the compressor, and / or the heat exchange capacity of the medium of the medium supply device according to the amount of cooling required by the battery or the amount of heating required by the battery, so as to reduce or increase the output of the heat exchange component.

19. The battery thermal management method according to claim 18, wherein The regulating the refrigerant flow rate flowing in the battery thermal management system, the power of the compressor, and / or the heat exchange capacity of the medium of the medium supply device includes: When the amount of cooling required by the battery is greater than or equal to the second reference cooling amount, control the compressor to operate within a first power range. The second reference cooling amount is greater than the first reference cooling amount. The second reference cooling amount is a second preset cooling amount, or the second reference cooling amount is the maximum cooling output of the heat exchange component. When the amount of cooling required by the battery is less than the second reference cooling amount, control the compressor to operate within a second power range. The minimum value of the first power range is greater than or equal to the maximum value of the second power range.

20. The battery thermal management method according to claim 19, wherein The regulating the refrigerant flow rate flowing in the battery thermal management system, the power of the compressor, and / or the heat exchange capacity of the medium of the medium supply device further includes: When the amount of cooling required by the battery is greater than or equal to the third reference cooling amount, the refrigerant flowing in the battery thermal management system flows at a first flow rate. The first reference cooling amount is greater than the third reference cooling amount. The third reference cooling amount is a third preset cooling amount, or the third reference cooling amount is the maximum cooling output of the heat exchange component when the compressor is in the minimum operating frequency and the heat exchange capacity of the medium of the medium supply device is at the maximum state. When the amount of cooling required by the battery is less than the third reference cooling amount, the refrigerant flowing in the battery thermal management system flows at a second flow rate, and the second flow rate is less than the first flow rate.

21. The battery thermal management method according to any one of claims 15 to 20, characterized in that The battery thermal management method further includes: When the amount of heating required by the battery is greater than or equal to the first reference heating amount, control the compressor to operate within a third power range. The first reference heating amount is a first preset heating amount, or the first reference heating amount is the maximum heating output of the heat exchange component. When the amount of heating required by the battery is less than the first reference heating amount, control the compressor to operate within a fourth power range. The minimum value of the third power range is greater than or equal to the maximum value of the fourth power range.

22. The battery thermal management method according to claim 21, wherein, The battery thermal management system further includes a medium supply device. The medium supply device includes a heating device. The battery thermal management method further includes: When the heating amount required by the battery is greater than or equal to a second reference heating amount, control the medium of the medium supply device to flow at a first flow rate and / or control the heating device to operate at a first heating power, where the second reference heating amount is less than the first reference heating amount, the second reference heating amount is a second preset heating amount, or the first reference heating amount is the maximum heating output of the heat exchange component when the compressor is in a state of minimum operating frequency; When the heating amount required by the battery is less than the second reference heating amount, control the medium of the medium supply device to flow at a second flow rate and / or control the heating device to operate at a second heating power, where the second flow rate is less than the first flow rate and the second heating power is less than the first heating power.

23. The battery thermal management method according to claim 22, wherein The battery thermal management method further includes: When the heating amount required by the battery is greater than or equal to a third reference heating amount, control the refrigerant flowing in the battery thermal management system to flow at a third flow rate, where the third reference heating amount is less than the second reference heating amount, the third reference heating amount is a third preset heating amount, or the third reference heating amount is the maximum heating output of the heat exchange component when the compressor is in a state of minimum operating frequency and the heat exchange capacity of the medium of the medium supply device is minimum; When the heating amount required by the battery is less than the third reference heating amount, control the refrigerant flowing in the battery thermal management system to flow at a fourth flow rate, where the fourth flow rate is less than the third flow rate.

24. An electrical device, characterized in that, It includes: A battery; The battery thermal management system according to any one of claims 1 to 23, where the battery is connected to the heat exchange component.

25. An energy storage device, characterized in that A battery; The battery thermal management system according to any one of claims 1 to 23, where the battery is connected to the heat exchange component.

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