Temperature Control Equipment and Test Systems

Abstract

The present invention relates to a temperature control device and a test system. The temperature control device is used to perform temperature control on a battery pack cooled by a refrigerant, and includes a first connection port for detachably connecting to a refrigerant outlet of the battery pack, a second connection port for detachably connecting to a refrigerant inlet of the battery pack, a compressor, a condenser, an expansion valve having a first outlet connected to a second connection port, and a pressure regulating valve, a first end of the pressure regulating valve being connected to the first connection port and a second end of the pressure regulating valve being connected to an inlet of the compressor, and the pressure regulating valve is a pressure regulating valve for regulating the pressure of the gas discharged from the refrigerant outlet of the battery pack to a preset range for the pressure value of the gas discharged from the second end of the pressure regulating valve to the inlet of the compressor. The temperature control device and the test system of the embodiment of the present application can maintain the battery pack at a stable and appropriate temperature during the battery pack test process.

Description

[Technical field]

[0001] [CROSS REFERENCE TO RELATED APPLICATIONS] This application claims priority to Chinese patent application CN 202210290309.3, entitled “Temperature Control Equipment and Test System,” filed on March 23, 2022, the entire contents of which are incorporated herein by reference.

[0002] TECHNICAL FIELD This application relates to the field of batteries, and more specifically, to thermal management equipment and testing systems. [Background technology]

[0003] Energy saving and reducing pollutant emissions are the keys to the sustainable development of the automotive industry. In this context, electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages in energy saving and environmental protection. However, for electric vehicles, battery technology is a key factor in their development.

[0004] In the development of battery technology, in addition to improving the performance of the battery, safety issues are also one of the issues that cannot be ignored. Before using the battery, a large amount of experimental testing is carried out to ensure the safety and performance of the battery. Therefore, how to provide an environment with a relatively stable temperature for battery testing is an issue that needs to be resolved immediately in the current battery testing process. Summary of the Invention

[0005] The embodiments of the present application provide a temperature control device and a test system that can maintain a battery pack at a stable and appropriate temperature during the battery pack testing process.

[0006] According to a first aspect, there is provided a temperature control device for performing temperature control on a battery pack cooled by a refrigerant, the temperature control device comprising: a first connection port for detachably connecting to a refrigerant outlet of a battery pack; a second connection port for detachably connecting to a refrigerant inlet of the battery pack; a compressor; a condenser, an inlet of the condenser connected to an outlet of the compressor; an expansion valve, a first inlet of the expansion valve connected to an outlet of the condenser and a first outlet of the expansion valve connected to the second connection port; and a pressure regulating valve, a first end of the pressure regulating valve connected to the first connection port and a second connection port for detachably connecting to a refrigerant inlet of the battery pack. a second end of the pressure regulating valve connected to the inlet of the compressor, the pressure regulating valve adjusting the pressure of the gas discharged from a refrigerant outlet of the battery pack to set the pressure value of the gas discharged from the second end of the pressure regulating valve to the inlet of the compressor within a preset range; and a detection device connected to the first connection port and / or the second connection port and used to detect a state of the refrigerant at the first connection port and / or the second connection port, the detection device including at least one of a sight glass, a temperature sensor, and a pressure sensor.

[0007] Therefore, the temperature control device of the embodiment of the present application can form a circuit after being connected to the battery pack, and can circulate and provide refrigerant to the battery pack through the compressor, condenser, expansion valve and pressure regulating valve, and can detect the state of the refrigerant at the corresponding position through the detection device, such as the temperature, pressure and content of the refrigerant, thereby performing temperature control on the battery pack connected to the temperature control device, and maintaining the battery pack at a relatively stable temperature, which can be widely used in various test processes of the battery pack. In particular, the battery pack generates a large amount of heat during the charging and discharging process, so compared with other temperature reduction methods, the embodiment of the present application uses a refrigerant to reduce the temperature of the battery pack, and the temperature reduction speed is faster.

[0008] In some embodiments, the preset range is 300±30 kPa, which can not only ensure the working efficiency of the compressor, but also reduce the power consumption.

[0009] In some embodiments, the temperature control device further includes an adjustment assembly adapted to connect an inlet of the compressor and an outlet of the condenser, the adjustment assembly adapted to adjust a proportion of refrigerant entering a first inlet of the expansion valve to refrigerant discharged through the outlet of the condenser.

[0010] The pressure regulating valve of the embodiment of the present application is used to provide a gas with a relatively stable pressure value to the compressor, and if the pressure of the refrigerant discharged from the battery pack does not meet a preset range, it can be adjusted by this regulating assembly.

[0011] In some embodiments, the regulating assembly is adapted to increase the proportion of refrigerant entering the first inlet of the expansion valve relative to the refrigerant discharged through the outlet of the condenser when the pressure of the gas at the first end of the pressure regulating valve is higher than the preset range, and / or to decrease the proportion of refrigerant entering the first inlet of the expansion valve relative to the refrigerant discharged through the outlet of the condenser when the pressure of the gas at the first end of the pressure regulating valve is lower than the preset range.

[0012] Not only can the efficiency of cooling the battery pack with the coolant be guaranteed, but waste can also be avoided.

[0013] In some embodiments, when the pressure of the gas at the first end of the pressure regulating valve is lower than the preset range, the regulating assembly is used to control at least a portion of the refrigerant discharged through the outlet of the condenser to flow to the inlet of the compressor, thereby reducing the refrigerant entering the expansion valve and further avoiding insufficient utilization of the refrigerant in the battery pack.

[0014] In some embodiments, the temperature control device further includes a control unit for controlling the regulating assembly according to the pressure of the gas at the first end of the pressure regulating valve, so that the regulating efficiency is high and wasteful power consumption is avoided.

[0015] In some embodiments, the adjustment assembly includes a capillary and a solenoid valve, the inlet of the solenoid valve being connected to the outlet of the condenser and the outlet of the solenoid valve being connected to the inlet of the compressor via the capillary, simplifying the circuit and making adjustment easy.

[0016] In some embodiments, the detection device includes at least one of: a first sight glass disposed between the compressor inlet and the pressure regulating valve for monitoring liquid mixed with gas entering the compressor inlet; a first temperature sensor disposed between the pressure regulating valve and the first connection port for monitoring a temperature of the refrigerant entering the pressure regulating valve; and a first pressure sensor disposed between the pressure regulating valve and the first connection port for monitoring a pressure of the refrigerant entering the pressure regulating valve.

[0017] The acquired temperature and pressure of the coolant discharged from the battery pack may be used to record the temperature and pressure data, and other components in the temperature control device may be adjusted according to the detected temperature and pressure. For example, if the coolant discharged from the battery pack is less than a preset pressure value, it may be determined that there is an excess of coolant in the battery pack, and the coolant entering the battery pack may be further reduced.

[0018] In some embodiments, the expansion valve is an H-type thermal expansion valve, and the expansion valve further includes a second inlet and a second outlet, the second inlet of the expansion valve being connected to the first connection port, thereby discharging gas discharged from a refrigerant outlet of the battery pack through the second outlet of the expansion valve, and the expansion valve being used to adjust the refrigerant discharged from the first outlet of the expansion valve according to the gas discharged from the refrigerant outlet of the battery pack.

[0019] The expansion valve determines whether the refrigerant is being fully utilized within the battery pack depending on the condition, such as temperature or pressure, of the refrigerant passing through the second inlet and the second outlet, and further increases or decreases the refrigerant discharged from the first outlet of the expansion valve.

[0020] In some embodiments, the temperature control device is a liquid storage tank, an inlet of the liquid storage tank is connected to the outlet of the condenser, and the liquid storage tank further includes a liquid storage tank for storing the refrigerant discharged from the outlet of the condenser, a drying filter installed between the outlet of the liquid storage tank and a first inlet of the expansion valve, for filtering impurities in the refrigerant discharged from the outlet of the liquid storage tank, and a blower for lowering the temperature of the condenser.

[0021] When the refrigerant discharged from the condenser does not match the actual demand of the battery pack, especially when the refrigerant discharged from the condenser is excessive, the liquid storage tank can store the refrigerant to avoid waste of the refrigerant. The dry filter is used to filter impurities in the refrigerant discharged from the outlet of the liquid storage tank, thereby improving the cooling effect after the refrigerant enters the battery pack. The blower is used to cool the condenser and improve the efficiency of the condenser.

[0022] In some embodiments, the detection device includes at least one of a second sight glass disposed between the dry filter and the first inlet of the expansion valve for monitoring a condition of the refrigerant entering the first inlet of the expansion valve, a second temperature sensor disposed between the dry filter and the first inlet of the expansion valve for monitoring a temperature of the refrigerant entering the first inlet of the expansion valve, and a second pressure sensor disposed between the dry filter and the first inlet of the expansion valve for monitoring a pressure of the refrigerant entering the first inlet of the expansion valve.

[0023] The temperature and pressure of the refrigerant discharged through the drying filter may be obtained and recorded, and other components within the temperature control device may be adjusted according to the detected temperature and pressure to improve the cooling efficiency of the battery pack.

[0024] In some embodiments, the detection device further includes a third temperature sensor connected to the battery pack for monitoring the temperature inside the battery pack. According to the temperature measured by the third temperature sensor, if the measured temperature exceeds a temperature required for testing or exceeds a normal temperature of the battery pack, the temperature management device may be controlled to be turned on, and conversely, if the measured temperature meets the testing requirements or meets the normal temperature of the battery pack, the temperature management device may be controlled to be turned off, to avoid waste.

[0025] In some embodiments, the temperature control device further includes a first valve and a second valve, the first valve being installed between the outlet of the condenser and the first inlet of the expansion valve, and the second valve being installed between the first connection port and the inlet of the compressor, and when the first valve and the second valve are off, the battery pack is replaced with another battery pack and connected to the temperature control device, so that when the first valve and the second valve are turned on again, the temperature control device provides temperature control to the battery pack.

[0026] In this way, the battery pack can be replaced through the process of turning on and off the first valve and the second valve, and the refrigerant discharged from the condenser is not wasted, and the compressor does not allow other impurities to enter. When the first valve and the second valve are turned on again, the temperature control device and the battery pack can form a closed circuit, and the internal refrigerant circulates through the circuit, improving the use efficiency of the refrigerant.

[0027] In some embodiments, the temperature control device further includes a vacuum assembly, which is used to perform a vacuum process on the battery pack after connecting the battery pack to the temperature control device and before the first valve and the second valve are turned on again, thereby removing excess gas in the battery pack; and after turning on the first valve and the second valve again, in the process of the temperature control device performing temperature control on the battery pack, only the refrigerant circulates in the closed circuit formed by the temperature control device and the battery pack, avoiding the influence of other gases and improving the cooling effect of the refrigerant.

[0028] According to a second aspect, there is provided a test system including a temperature control device according to the first aspect or any one of the embodiments of the first aspect, and a plurality of battery packs, the temperature control device being used to test the plurality of battery packs by performing temperature control on the plurality of battery packs, each of which is cooled by a refrigerant, within different periods of time. [Brief description of the drawings]

[0029] [Figure 1] FIG. 1 is a schematic block diagram of a temperature management device according to one embodiment of the present application. [Diagram 2] FIG. 2 is a schematic block diagram of a temperature management device connected to a battery pack in one embodiment of the present application. [Diagram 3] FIG. 2 is another schematic block diagram of a temperature management device connected to a battery pack in one embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] The technical solutions in the embodiments of the present application are described below in conjunction with the drawings.

[0031] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained based on the embodiments of the present application without the need for creative efforts by those skilled in the art are all within the scope of protection of the present application.

[0032] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the art in the technical field of this application, and the terms used in the specification of this application are only for describing specific embodiments and are not intended to limit this application, and the terms "comprises" and "has" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive "comprises". The terms "first", "second", etc. in the specification and claims of this application or the above drawings are not intended to describe a specific order or subordinate relationship, but are intended to distinguish different objects.

[0033] An "embodiment" referred to in this application means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art can explicitly and implicitly understand that the embodiments described in this application can be combined with other embodiments.

[0034] In the description of the present application, it should be explained that unless otherwise clearly defined or limited, the terms "attached", "connected", "connected" and "attached" should be understood in a broad sense, for example, may be a fixed connection, a removable connection, or an integral connection, may be a direct connection, may be an indirect connection through an intermediate medium, or may be communication between the insides of two elements. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific situation.

[0035] The term "and / or" in this application merely describes the relationship between related objects and indicates that three relationships may exist, for example, A and / or B may represent three cases: A alone, A and B in combination, and B alone. In addition, the character " / " in this application generally indicates that the related objects before and after are in an "or" relationship.

[0036] In the embodiments of the present application, the same reference numerals denote the same components, and detailed descriptions of the same components in different embodiments are omitted for the sake of brevity. It should be understood that the dimensions of thickness, aspect, etc. of various components in the embodiments of the present application shown in the drawings, and the dimensions of thickness, aspect, etc. of the entire integrated device are only illustrative descriptions, and do not constitute any limitations on the present application.

[0037] As used herein, the term "plurality" refers to two or more (including two); similarly, the term "set" refers to two or more (including two); and the term "plurality" refers to two or more (including two).

[0038] It should be understood that the battery of the embodiment of the present application may be used in various power consuming devices to provide electrical energy to the power consuming devices. The power consuming devices may be vehicles, mobile phones, portable devices, notebook computers, ships, spacecraft, electric toys and power tools, etc. The vehicles may be fuel oil vehicles, gas vehicles or new energy vehicles, the new energy vehicles may be pure electric vehicles, hybrid vehicles or range extender vehicles, etc., the spacecraft may include airplanes, rockets, space shuttles and spacecraft, etc., the electric toys may include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric plane toys, etc., and the electric tools may include metal cutting power tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric drivers, electric hammers, electric impact drills, concrete vibrators and electric planers, etc. The embodiment of the present application does not particularly limit the above power consuming devices.

[0039] The battery may be referred to as a battery pack. To meet different power usage demands, the battery may include multiple battery cells, where the multiple battery cells may be connected in series, parallel, or series-parallel, and the series-parallel connection is a mixture of the series and parallel connections. In some embodiments, the multiple battery cells may be first connected in series, parallel, or series-parallel to form a battery module, and the multiple battery modules may be further connected in series, parallel, or series-parallel to form a battery. That is, the multiple battery cells may directly form a battery, or may first form a battery module, and then the battery module may form a battery.

[0040] In the present application, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, or a magnesium ion battery, and the embodiments of the present application are not limited thereto. The battery cell may have a cylindrical, flat, rectangular, or other shape, and the embodiments of the present application are not limited thereto. Battery cells are generally divided into three types, namely, cylindrical battery cells, rectangular battery cells, and pouch battery cells, according to the packaging method, and the embodiments of the present application are not limited thereto.

[0041] The battery referred to in the embodiments of the present application is a single physical module that includes one or more battery cells and provides higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack. The battery generally includes a housing for packaging one or more battery cells. The housing can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0042] The battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode plate, a negative electrode plate, and a separator. The battery cell is mainly operated by the movement of metal ions between the positive electrode plate and the negative electrode plate. The positive electrode plate includes a positive electrode collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode collector, and the positive electrode collector without the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer, and the positive electrode collector without the positive electrode active material layer is called a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive electrode collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode plate includes a negative electrode collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode collector. The negative electrode collector on which the negative electrode active material layer is not coated protrudes from the negative electrode collector coated with the negative electrode active material layer, and the negative electrode collector on which the negative electrode active material layer is not coated is called a negative electrode tab. The material of the negative electrode collector may be copper, and the negative electrode active material may be carbon or silicon. The number of positive electrode tabs is multiple and the number of negative electrode tabs is multiple so that melting does not occur even when a large current is passed through it. The material of the separator may be polypropylene (PP) or polyethylene (PE), etc. The electrode assembly may have a wound structure or a stacked structure, and the embodiment of the present application is not limited thereto.

[0043] FIG. 1 shows a schematic block diagram of a temperature control device 1 of an embodiment of the present application, which is used to perform temperature control on a battery pack 2 cooled by a refrigerant. As shown in FIG. 1, the temperature control device 1 includes a first connection port 11 for detachably connecting to a refrigerant outlet 21 of the battery pack 2, a second connection port 12 for detachably connecting to a refrigerant inlet 22 of the battery pack 2, a compressor 10, a condenser 20 whose inlet 201 is connected to an outlet 102 of the compressor 10, an expansion valve 30 whose first inlet 301 is connected to an outlet 202 of the condenser 20 and whose first outlet 302 is connected to the second connection port 12, and a pressure regulating valve 40 whose first end 401 is connected to the first connection port 11 and whose second end 402 is connected to the second connection port 12. is connected to the inlet 101 of the compressor 10, and the pressure regulating valve 40 is a pressure regulating valve for regulating the pressure of the gas discharged from the refrigerant outlet 21 of the battery pack 2 to set the pressure value of the gas discharged from the second end 402 of the pressure regulating valve 40 to the inlet 101 of the compressor 10 within a preset range, and a detection device 50 is connected to the first connection port 11 and / or the second connection port 12 and is used to detect the state of the refrigerant at the first connection port 11 and / or the second connection port 12, and the detection device 50 includes at least one of a sight glass, a temperature sensor, and a pressure sensor.

[0044] Therefore, the temperature control device 1 in the embodiment of the present application can form a circuit after being connected to the battery pack 2, and circulates and provides refrigerant to the battery pack 2 through the compressor 10, the condenser 20, the expansion valve 30 and the pressure regulating valve 40, and detects the state of the refrigerant at the corresponding position through the detection device 50, for example, the temperature, pressure and content of the refrigerant, thereby performing temperature control on the battery pack 2 connected to the temperature control device 1, and maintaining the battery pack 2 at a relatively stable temperature, which can be widely used in various test processes of the battery pack 2. In particular, the battery pack 2 generates a large amount of heat during the charging and discharging process, and therefore, compared with other temperature-reducing methods, the embodiment of the present application uses a refrigerant to reduce the temperature of the battery pack 2, and the temperature-reducing speed is faster.

[0045] The temperature management device 1 of the embodiment of the present application will be described in detail below with reference to the drawings. Figure 2 shows a schematic block diagram of the temperature management device 1 of the embodiment of the present application providing temperature management to the battery pack 2, and Figure 3 shows another schematic block diagram of the temperature management device 1 of the embodiment of the present application providing temperature management to the battery pack 2.

[0046] It should be understood that the first connection port of the embodiment of the present application 11 A removable connection is used between the first connection port 12 and the battery pack 2, and between the second connection port 12 and the battery pack 2, so that the temperature control device 1 can be used to provide temperature control to different battery packs. For example, the temperature control device 1 may perform temperature control on multiple battery packs cooled by refrigerants at different times, and further test multiple battery packs. The temperature control device 1 can be used repeatedly and is easy to remove and install.

[0047] The temperature control device 1 of the embodiment of the present application may be used in a test system, which includes the temperature control device 1 and a plurality of battery packs, and the temperature control device 1 is used to test the plurality of battery packs, each of which is cooled by a refrigerant, by performing temperature control on the plurality of battery packs within different time periods. Specifically, the test system including the temperature control device 1 and the plurality of battery packs of the embodiment of the present application may be used in various test processes. For example, the temperature control device 1 may be used in at least one test process of the battery pack 2 among a mud resistance test, a high temperature operating endurance test (HTOE), and a four-season test.

[0048] For example, in the case of a four-season test, the test conditions may include that the battery pack 2 is placed in an environmental temperature chamber, the temperature of the environmental temperature chamber is constant at 25° C., the temperature control device 1 needs to be turned on when the surface temperature of the battery cells in the battery pack 2 is 38° C. or higher, and the temperature control device 1 may be turned off when the temperature drops to 35° C., and the test period is one year. Here, the temperature of the battery cells can be detected by a negative temperature coefficient thermistor (NTC).

[0049] Also, for example, in the case of HTOE testing, the test conditions generally include a requirement that the surface temperature of the battery cells in the battery pack 2 be controlled to 50°C ± 2°C (for example, by NTC testing), and a continuous test period of 4 months. If this temperature control device 1 is not used and a charger / discharger is attached to this battery pack 2, the NTC detection temperature can be up to 58°C, but the maximum temperature of the battery cells must not exceed 57°C. Therefore, when the battery pack 2 exceeds the test temperature, the temperature control device 1 may be turned on at any time, and when the temperature drops to a temperature required for the test, the temperature control device 1 may be turned off.

[0050] For ease of explanation, the present application mainly takes as an example the temperature management of one battery pack 2. For example, the battery pack 2 needs to be maintained at a preset temperature value during the test process, where the preset temperature value may refer to a certain numerical value or a certain numerical range, for example, in the above four-season test, the preset temperature value may be set to 38°C or less. For example, the length, width and height of the battery pack 2 in the embodiment of the present application may be 450*650*1200, where the units of the length, width and height are all millimeters (mm), but the embodiment of the present application is not limited thereto.

[0051] Specifically, as shown in Figures 2 and 3, the temperature control device 1 further includes a first valve 91 and a second valve 92, the first valve 91 is installed between the outlet 202 of the condenser 20 and the first inlet 301 of the expansion valve 30, and the second valve 92 is installed between the first connection port 11 and the inlet 101 of the compressor 10. When the first valve 91 and the second valve 92 are off, the battery pack 2 is replaced with another battery pack and connected to the temperature control device 1, so that when the first valve 91 and the second valve 92 are turned on again, the temperature control device 1 performs temperature control on the battery pack 2. In this way, the process of turning on and off the first valve 91 and the second valve 92 can realize the replacement of the battery pack 2, and does not affect the waste of the refrigerant discharged from the condenser 20, and does not allow the compressor 10 to enter other impurities. Furthermore, when the first valve 91 and the second valve 92 are turned on again, the temperature control device 1 and the battery pack 2 can form a closed circuit, and the internal refrigerant circulates through this circuit, improving the utilization efficiency of the refrigerant.

[0052] Optionally, with the first valve 91 and the second valve 92 in the off state, the temperature control device 1 may be set to the off state, for example, by turning off the compressor 10 and / or the condenser 20, to save power consumption and avoid waste.

[0053] Specifically, the first valve 91 and the second valve 92 in the embodiments of the present application may be realized in various ways, and the first valve 91 and the second valve 92 may be realized in the same or different ways. For example, the first valve 91 in the embodiments of the present application may include a first manual ball valve 911 and / or a first pin valve 912, and the second valve 92 may include a second manual ball valve 921 and / or a second pin valve 922. As shown in Figures 2 and 3, the first valve 91 and the second valve 92 may use the same valve, thereby facilitating operation.

[0054] For example, as shown in FIG. 2 and FIG. 3, the first valve 91 may include a first manual ball valve 911, and the second valve 92 may include a second manual ball valve 921. After the first manual ball valve 911 and the second manual ball valve 921 are turned off, another battery pack can be replaced and the battery pack 2 can be installed, or the battery pack 2 can be removed and replaced with another battery pack. Or the first valve 91 may further include a first pin valve 912, or the second valve 92 may include a second pin valve 922. In this way, after the first manual ball valve 911 and the second manual ball valve 921 are turned off, the battery pack 2 can be removed and replaced with another battery pack. For example, the first pin valve 912 or the second pin valve 922 can be connected through a refrigerant recovery machine first, so that the remaining refrigerant in the battery pack 2 can be recovered, and after the recovery is completed, the battery pack 2 can be removed and replaced with another battery pack, so that the refrigerant can be recovered and reused, and the waste of the refrigerant and environmental pollution can be avoided.

[0055] Optionally, the temperature management device 1 of the embodiment of the present application may further include a vacuum assembly, which is used to perform a vacuum process on the battery pack 2 after the battery pack 2 and the temperature management device 1 are connected and before the first valve 91 and the second valve 92 are turned on again. Specifically, as shown in FIG. 2 and FIG. 3, after the battery pack 2 and the temperature management device 1 are connected to each other in a state in which the first valve 91 and the second valve 92 are turned off, i.e., in a state in which the first manual ball valve 911 of the first valve 91 and the second manual ball valve 921 of the second valve 92 are both turned off, the vacuum assembly is used to perform a vacuum process on the battery pack 2, thereby removing excess gas in the battery pack 2. For example, the vacuum assembly may be connected to the first pin valve 912 of the first valve 91 and / or the second pin valve 922 of the second valve 92, and the first pin valve 912 and / or the second pin valve 922 are used to perform a vacuum process on the battery pack 2. In this way, after the first valve 91 and the second valve 92 are turned on again, i.e., after the first manual ball valve 911 of the first valve 91 and the second manual ball valve 921 of the second valve 92 are turned on again, in the process of the temperature control device 1 performing temperature control for the battery pack 2, only the refrigerant circulates in the closed circuit formed by the temperature control device 1 and the battery pack 2, avoiding the influence of other gases, and also improving the cooling effect of the refrigerant and the stability of the system.

[0056] In the embodiment of the present application, after the evacuation process, the first valve 91 and the second valve 92 are turned on, and before turning on the temperature control device 1, a refrigerant may be added to the circuit formed by the temperature control device 1 and the battery pack 2. After the refrigerant is added, the temperature control device 1 can be turned on at any time, for example, when the temperature of the battery pack 2 exceeds the test condition, the temperature control device 1 can be turned on at any time to lower the temperature of the battery pack 2.

[0057] Optionally, the refrigerant in the embodiments of the present application may use various materials, for example, the refrigerant may be refrigerant 134a, which has a relatively high cooling effect on the battery pack 2, but the embodiments of the present application are not limited thereto.

[0058] Optionally, the refrigerant in the embodiments of the present application may be added at any location of the temperature control device 1. For example, typically by adding refrigerant to the low pressure end or the high pressure end of the compressor 10, and turning on the temperature control device 1 at any time after the refrigerant is added. Also, for example, refrigerant may be added via the first pin valve 912 of the first valve and / or the second pin valve 922 of the second valve 92, but the embodiments of the present application are not limited thereto.

[0059] It should be understood that, as shown in Figures 2 and 3, the inlet 101 of the compressor 10 in the embodiment of the present application may be connected to the refrigerant outlet 21 of the battery pack 2 and used to perform compression processing on the gas discharged through the refrigerant outlet 21 of the battery pack 2. Specifically, the refrigerant may be cooled down in the battery pack 2 by the vaporization endotherm of the liquid refrigerant, and the refrigerant outlet 21 of the battery pack 2 discharges the vaporized gas with a relatively high temperature. The vaporized gas enters through the inlet 101 of the compressor 10, and the compressor 10 increases the pressure of the gas, and discharges the pressurized high-pressure gas to the condenser 20 through the outlet 102 of the compressor 10.

[0060] Alternatively, the compressor 10 of the embodiment of the present application may flexibly select the type of the compressor 10 according to the actual application. For example, the compressor 10 may use a DC inverter compressor and be powered using an alternating current (AC) to direct current (DC) conversion mode to improve the operating efficiency of the compressor 10, but the embodiment of the present application is not limited thereto. Specifically, if an inverter compressor is used for the compressor 10, the operating frequency of the compressor 10 can be adjusted according to the temperature change of the battery pack 2. For example, in the process of testing the battery pack 2, it is necessary to maintain the temperature of the battery pack 2 at a preset temperature value. If the temperature of the battery pack 2 increases by a relatively large amount compared to the preset temperature value, the operating frequency of the compressor 10 can be increased, thereby quickly lowering the temperature of the battery pack 2; conversely, if the temperature of the battery pack 2 increases by a relatively small amount compared to the increase in the preset temperature value, the operating frequency of the compressor 10 can be appropriately lowered to avoid waste of power consumption by the compressor 10 and also to avoid waste of resources and equipment failure due to repeated turning on and off of the temperature control device 1.

[0061] In an embodiment of the present application, as shown in FIGS. 2 and 3, the outlet 102 of the compressor 10 is connected to the inlet 201 of the condenser 20, and the condenser 20 is used to obtain a low-temperature liquid refrigerant by performing a liquefaction process on the high-pressure gas having a relatively high temperature discharged through the outlet 102 of the compressor 10.

[0062] Optionally, the type of the condenser 20 in the embodiment of the present application can be flexibly selected according to actual application. For example, the condenser 20 can be a fin condenser, which improves the heat dissipation efficiency of the condenser 20.

[0063] Optionally, as shown in FIG. 2 and FIG. 3, the temperature control device 1 of the embodiment of the present application further includes a blower 83 for lowering the temperature of the condenser 20, thereby further improving the efficiency of the condenser 20.

[0064] Optionally, as shown in Figures 2 and 3, the temperature control device 1 of the embodiment of the present application further includes a liquid storage tank 81, an inlet 811 of the liquid storage tank 81 is connected to the outlet 202 of the condenser 20, and an outlet 812 of the liquid storage tank 81 is connected to the second connection port, for example, the outlet 812 of the liquid storage tank 81 may be connected to the first valve 91. The liquid storage tank 81 is used to store the refrigerant discharged from the outlet 202 of the condenser 20, and thus, when the refrigerant discharged from the condenser 20 does not match with the actual demand of the battery pack 2, especially when the refrigerant discharged from the condenser 20 is excessive, the refrigerant can be stored by the liquid storage tank 81 to avoid waste of the refrigerant.

[0065] Optionally, as shown in Figures 2 and 3, the temperature control device 1 of the embodiment of the present application further includes a dry filter 82, which is installed between the outlet 202 of the condenser 20 and the first inlet 301 of the expansion valve 30. For example, the dry filter 82 may be located between the outlet 812 of the liquid storage tank 81 and the first inlet 301 of the expansion valve 30. For example, the dry filter 82 may be located between the outlet 812 of the liquid storage tank 81 and the first valve 91. The dry filter 82 is used to filter impurities in the refrigerant discharged from the outlet 812 of the liquid storage tank 81, thereby improving the cooling effect after the refrigerant enters the battery pack 2. For example, impurities such as water may be mixed into the refrigerant.

[0066] Optionally, the detection equipment 50 in the embodiment of the present application may include at least one of: a second sight glass 54 installed between the drying filter 82 and the first inlet 301 of the expansion valve 30 for monitoring the state of the refrigerant entering the first inlet 301 of the expansion valve 30, which may be used, for example, to observe the bubble content in the refrigerant or may further be used to observe the water content in the refrigerant; a second temperature sensor 55 installed between the drying filter 82 and the first inlet 301 of the expansion valve 30 for monitoring the temperature of the refrigerant entering the first inlet 301 of the expansion valve 30; and a second pressure sensor 56 installed between the drying filter 82 and the first inlet 301 of the expansion valve 30 for monitoring the pressure of the refrigerant entering the first inlet 301 of the expansion valve 30.

[0067] 2 and 3, the second sight glass 54, the second temperature sensor 55, and the second pressure sensor 56 in the embodiment of the present application may be positioned between the drying filter 82 and the first valve 91 and used to detect the state of the refrigerant at that position. Also, for example, the embodiment of the present application does not limit the relative positions between the second sight glass 54, the second temperature sensor 55, and the second pressure sensor 56, and the three may be arranged in the order as shown in Fig. 2 and 3, or in another order.

[0068] Optionally, as shown in Fig. 2, the temperature management device 1 of the embodiment of the present application may further include a control unit 70, which is connected to the second temperature sensor 55 and the second pressure sensor 56, and can timely obtain the temperature and pressure of the refrigerant discharged through the drying filter 82, and can be used to record the temperature and pressure data, and can adjust other components in the temperature management device 1 according to the detected temperature and pressure. Here, for clarity, the control unit 70 shown in Fig. 2 is not shown in Fig. 3 of the embodiment of the present application.

[0069] It should be understood that the control unit 70 in the embodiment of the present application can be realized in various ways, for example, the control unit 70 can be a controller, such as a Programmable Controller (PLC), used to control components connected thereto.

[0070] It should be understood that the refrigerant discharged through the condenser 20 in the embodiment of the present application can enter the battery pack 2 through the expansion valve 30. Specifically, the expansion valve 30 in the embodiment of the present application may include a first inlet 301 and a first outlet 302, where the first outlet 302 may be used as a first connection port of the temperature control device 1 to connect to the battery pack 2. Specifically, the expansion valve 30 may be used to perform a pressure reduction process on the liquid refrigerant discharged from the condenser 20, and the refrigerant after the pressure reduction enters the battery pack 2 through the refrigerant inlet 22 of the battery pack 2. When the temperature of the battery pack 2 exceeds the original preset temperature, for example, when the temperature of the battery pack 2 exceeds a temperature required for testing, the temperature reduction process may be performed on the battery pack 2 through the vaporization process of the internal refrigerant, and the vaporized gas may be discharged from the refrigerant outlet 21 of the battery pack 2.

[0071] It should be understood that the refrigerant entering the expansion valve 30 is generally a low-temperature, high-pressure refrigerant, for example, the pressure range of this refrigerant is generally 1500 kilopascals (kPa) ± 60 kPa, and the expansion valve 30 can perform a pressure reduction process on this refrigerant, and the refrigerant after pressure reduction enters the vacuum battery pack 2 through the refrigerant inlet 22 of the battery pack 2, thereby lowering the temperature of the battery pack 2.

[0072] Furthermore, the expansion valve 30 may also be used to adjust the amount of refrigerant that has entered the battery pack 2. For example, when the temperature rise of the battery pack 2 is relatively large, i.e., when the temperature of the battery pack 2 is much higher than a preset temperature value, the expansion valve 30 can release a relatively large amount of refrigerant, and conversely, when the temperature rise of the battery pack 2 is relatively small, the expansion valve 30 releases a relatively small amount of refrigerant.

[0073] Optionally, the expansion valve 30 in the embodiment of the present application may be selected according to the type of actual application. For example, the expansion valve 30 may be an H-type thermal expansion valve. Specifically, for the H-type thermal expansion valve, the expansion valve 30 further includes a second inlet 303 and a second outlet 304, and the second inlet 303 of the expansion valve 30 is connected to the first connection port 11, or the second inlet 303 of the expansion valve 30 may be the first connection port 11, so that the gas discharged from the refrigerant outlet 21 of the battery pack 2 is discharged through the second outlet 304 of the expansion valve 30, and the expansion valve 30 is used to adjust the refrigerant discharged from the first outlet 302 of the expansion valve 30 to the battery pack 2 according to the gas discharged from the refrigerant outlet 21 of the battery pack 2. Specifically, the expansion valve 30 can determine whether the refrigerant is fully utilized in the battery pack 2 according to the state, such as temperature or pressure, of the refrigerant passing through the second inlet 303 and the second outlet 304. Here, the expansion valve 30 may further include a temperature sensing structure, which is used to sense or measure the temperature of the refrigerant passing through the battery pack 2.

[0074] For example, when the temperature increase of the battery pack 2 is relatively small and the refrigerant in the battery pack 2 is not fully utilized due to an excess of refrigerant, the temperature of the refrigerant passing through the second inlet 303 of the expansion valve 30 is higher than a predetermined temperature value or the pressure is lower than a predetermined pressure value, and the expansion valve 30 can reduce the refrigerant discharged to the battery pack 2 from the first outlet 302; conversely, when the refrigerant in the battery pack 2 is insufficient, the temperature in the battery pack 2 is higher and the temperature of the refrigerant at the second inlet 303 of the expansion valve 30 is also higher than the predetermined temperature value, and the expansion valve 30 can increase the refrigerant discharged to the battery pack 2 from the first outlet 302.

[0075] Alternatively, the temperature of the refrigerant discharged from the battery pack 2 may be increased, for example, the preset temperature value of the discharged refrigerant may be generally set to 0°C-5°C, and the pressure of the refrigerant discharged from the battery pack 2 may be decreased, for example, the preset pressure value of the discharged refrigerant may be generally set to 300kPa±30kPa or 300kPa±20kPa, but the embodiments of the present application are not limited thereto.

[0076] It should be understood that the vaporized gas discharged from the refrigerant outlet 21 of the battery pack 2 in the embodiments of the present application may carry some liquid, for example, the vaporization of the refrigerant may be incomplete and liquid may be mixed with the vaporized gas refrigerant and discharged all at once, and the embodiments of the present application are not limited thereto.

[0077] Optionally, as shown in FIG. 2 and FIG. 3, the detection device 50 further includes a third temperature sensor 57 connected to the battery pack 2 for monitoring the temperature inside the battery pack 2. For example, according to the temperature measured by the third temperature sensor 57, if the measured temperature exceeds the temperature required for testing or exceeds the normal temperature of the battery pack 2, the temperature management device 1 may be controlled to be turned on, and conversely, if the measured temperature meets the testing requirements or meets the normal temperature of the battery pack 2, the temperature management device 1 may be controlled to be turned off. Specifically, the third temperature sensor 57 may be connected to the control unit 70, so that the control unit 70 can obtain the internal temperature of the battery pack 2, and the temperature value may be used to record the experimental data or to make adjustments to the temperature management device 1.

[0078] In the embodiment of the present application, the gas discharged through the battery pack 2 can directly enter the compressor 10, or can enter the compressor 10 through the pressure regulating valve 40. Specifically, the first end 401 of the pressure regulating valve 40 in the embodiment of the present application is connected to the refrigerant outlet 21 of the battery pack 2, for example, the first end 401 of the pressure regulating valve 40 may be connected to the second valve 92, and the second end 402 of the pressure regulating valve 40 is connected to the inlet 101 of the compressor 10. The pressure regulating valve 40 may be used to adjust the pressure value of the gas discharged from the second end 402 of the pressure regulating valve 40 to the inlet 101 of the compressor 10 to a preset range.

[0079] Alternatively, the preset range in the embodiment of the present application may be set according to actual application, for example, according to the operating efficiency of the compressor 10. For example, based on the above description, the preset pressure value of the refrigerant discharged from the battery pack 2 in the embodiment of the present application is generally 300 kPa±30 kPa, and the preset range may be set to 300±30 kPa correspondingly, thereby ensuring the operating efficiency of the compressor 10 and reducing the power consumption.

[0080] Optionally, the detection equipment 50 in the embodiment of the present application further includes at least one of a first sight glass 51 installed between the inlet 101 of the compressor 10 and the pressure regulating valve 40 for monitoring liquid mixed with the gas entering the inlet 101 of the compressor 10, a first temperature sensor 52 installed between the pressure regulating valve 40 and the first connection port 11 for monitoring the temperature of the refrigerant entering the pressure regulating valve 40, and a first pressure sensor 53 installed between the pressure regulating valve 40 and the first connection port 11 for monitoring the pressure of the refrigerant entering the pressure regulating valve 40.

[0081] For example, as shown in Figures 2 and 3, the first sight glass 51 in the embodiment of the present application is generally installed between the compressor 10 and the pressure regulating valve 40 and is used to detect the state of the liquid mixed with the gas entering the compressor 10. For example, it may be used to observe the state of the liquid refrigerant mixed with the gas entering the compressor 10, so that when the liquid refrigerant mixed with the gas entering the compressor 10 is too much, the liquid refrigerant mixed with the gas entering the compressor 10 can be timely reduced, so as to avoid too much low-temperature refrigerant entering the compressor 10 and excessive freezing of the low-pressure end of the compressor 10, and also to avoid the liquid hammer accident of the compressor 10. The first temperature sensor 52 and the first pressure sensor 53 in the embodiment of the present application may be installed between the pressure regulating valve 40 and the second valve 92 and are used to detect the temperature and pressure of the refrigerant entering the pressure regulating valve 40. Moreover, the embodiments of the present application do not limit the relative order between the first temperature sensor 52 and the first pressure sensor 53, for example, the installation order between the first temperature sensor 52 and the first pressure sensor 53 may be as shown in Figures 2 and 3, or may be arranged in other orders.

[0082] In some embodiments, the control unit 70 of the embodiments of the present application may be connected to the first temperature sensor 52 and the first pressure sensor 53, thereby timely acquiring the temperature and pressure of the coolant discharged from the battery pack 2. The acquired temperature and pressure of the coolant discharged from the battery pack 2 may be used to record the temperature and pressure data, and other members in the temperature management device 1 may be adjusted according to the detected temperature and pressure. For example, if the coolant discharged from the battery pack 2 is less than a preset pressure value, it may determine that the coolant in the battery pack 2 is excessive, and further reduce the coolant entering the battery pack 2.

[0083] It should be understood that the second end 402 of the pressure regulating valve 40 in the embodiment of the present application may be used to input gas into the inlet 101 of the compressor 10 with a pressure value in a preset range, but the pressure value of the refrigerant at the first end 401 of the pressure regulating valve 40 may not be within the preset range, and the temperature control device 1 needs to be adjusted. Specifically, the refrigerant pressure at the first end 401 of the pressure regulating valve 40 may be lower than the preset range due to various reasons. For example, if the temperature of the refrigerant discharged from the condenser 20 is too low, the refrigerant pressure value at the first end 401 of the pressure regulating valve 40 may be too low. For example, the gas pressure value output from the high pressure end of the compressor 10 may be low, i.e., the pressure value of the gas discharged from the outlet 102 of the compressor 10 to the condenser 20 may be low, causing the refrigerant pressure value at the first end 401 of the pressure regulating valve 40 to be too low. For example, if the temperature of the battery pack 2 is relatively low, the refrigerant pressure value at the first end 401 of the pressure regulating valve 40 may be too low. Moreover, the various causes described above may exist alone or a plurality of causes may exist simultaneously.

[0084] If the temperature of the refrigerant entering the compressor 10 is too low, the temperature of the low-pressure end of the compressor 10 may be too low, causing excessive freezing, which may cause a liquid hammer accident in the compressor 10 and further cause a breakdown or damage to the compressor 10. Therefore, by installing the pressure regulating valve 40, it is possible to prevent the temperature of the refrigerant entering the compressor 10 from becoming too low.

[0085] For the above reasons, the pressure of the refrigerant at the first end 401 of the pressure regulating valve 40 can be adjusted in various ways. For example, the temperature management device 1 of the embodiment of the present application may further include an adjustment assembly 60, which is used to connect the inlet 101 of the compressor 10 and the outlet 202 of the condenser 20, and the adjustment assembly 60 is used to adjust the proportion of the refrigerant entering the first inlet 301 of the expansion valve 30 to the refrigerant discharged through the outlet 202 of the condenser 20. The pressure regulating valve 40 of the embodiment of the present application is used to provide a gas with a relatively stable pressure value to the compressor 10, and when the pressure of the refrigerant discharged from the battery pack 2 does not meet a preset range, it can be adjusted by the adjustment assembly 60.

[0086] For example, the pressure regulating valve 40 in the embodiment of the present application may be connected to a control unit 70, and the regulating assembly 60 may be connected to the control unit 70, which controls the regulating assembly 60 according to the gas pressure at the first end 401 of the pressure regulating valve 40, so as to facilitate timely adjustment of the temperature control equipment 1, improve the cooling efficiency, and avoid waste.

[0087] Specifically, the regulating assembly 60 in the embodiment of the present application may be used to increase the proportion of the refrigerant entering the first inlet 301 of the expansion valve 30 to the refrigerant discharged through the outlet 202 of the condenser 20 when the pressure of the gas at the first end 401 of the pressure regulating valve 40 is higher than a preset range. Specifically, when the pressure of the gas entering the first end 401 of the pressure regulating valve 40 is higher than a preset range, or the temperature of the gas entering the first end 401 of the pressure regulating valve 40 is higher than a preset temperature value, there may be a problem such as a shortage of refrigerant in the battery pack 2, and therefore the regulating assembly 60 can increase the refrigerant entering the first inlet 301 of the expansion valve 30, thereby increasing the refrigerant in the battery pack 2, and further achieving the effect of rapid cooling, and reducing the gas pressure at the first end 401 of the pressure regulating valve 40.

[0088] The regulating assembly 60 of the embodiment of the present application may further be used to reduce the proportion of the refrigerant entering the first inlet 301 of the expansion valve 30 to the refrigerant discharged through the outlet 202 of the condenser 20 when the pressure of the gas at the first end 401 of the pressure regulating valve 40 is lower than a preset range. Specifically, when the pressure of the gas entering the first end 401 of the pressure regulating valve 40 is lower than a preset range, or the temperature of the gas entering the first end 401 of the pressure regulating valve 40 is lower than a preset temperature value, there may be problems such as excessive refrigerant in the battery pack 2 or the temperature of the refrigerant in the battery pack 2 is too low, and therefore the regulating assembly 60 can reduce the refrigerant entering the first inlet 301 of the expansion valve 30, thereby reducing the refrigerant in the battery pack 2 and avoiding refrigerant waste.

[0089] Optionally, when the gas pressure at the first end 401 of the pressure regulating valve 40 is lower than a preset range, the regulating assembly 60 is used to control at least a portion of the refrigerant discharged through the outlet 202 of the condenser 20 to flow to the inlet 101 of the compressor 10, thus reducing the portion of the refrigerant discharged from the condenser 20 that enters the expansion valve 30, i.e., reducing the refrigerant that enters the battery pack 2, and avoiding waste.

[0090] It should be understood that the regulating assembly 60 of the embodiment of the present application may be set according to the actual application. For example, as shown in Figures 2 and 3, the regulating assembly 60 may include a capillary 61 and a solenoid valve 62, the inlet 621 of the solenoid valve 62 is connected to the outlet 202 of the condenser 20, and the outlet 622 of the solenoid valve 62 is connected to the inlet 101 of the compressor 10 through the capillary 61, which is easy to regulate and the circuit setting is relatively simple. For example, the solenoid valve 62 of the embodiment of the present application has two states, on and off, and the amount of refrigerant flowing through the solenoid valve 62 to the capillary 61 can be adjusted by controlling the on-time length or the on-time number of the solenoid valve 62.

[0091] When it is necessary to increase the amount of refrigerant entering the expansion valve 30 or the battery pack 2, or to increase the proportion of the refrigerant entering the first inlet 301 of the expansion valve 30 relative to the refrigerant discharged through the outlet 202 of the condenser 20, the solenoid valve 62 is turned off, or the on-time length or on-time count of the solenoid valve 62 is reduced, so that the refrigerant discharged through the condenser 20 enters the expansion valve 30 in large amounts, i.e., into the battery pack 2, and into the compressor 10 via the capillary 61 in relatively small or no amount of time. Conversely, the amount of refrigerant entering the expansion valve 30 or the battery pack 2 is reduced, or the proportion of the refrigerant entering the first inlet 301 of the expansion valve 30 is increased. When it is necessary to reduce the proportion of the refrigerant entering the first inlet 301 of the expansion valve 30 in the refrigerant discharged through the outlet 202 of the condenser 20, the solenoid valve 62 is turned on, or the on-time length or on-time number of times of the solenoid valve 62 is increased, so that part of the refrigerant discharged through the condenser 20 enters the expansion valve 30, i.e., into the battery pack 2, and at the same time, part of the refrigerant passes directly through the capillary 61 into the compressor 10, thereby reducing the proportion of the refrigerant entering the first inlet 301 of the expansion valve 30 in the refrigerant discharged through the outlet 202 of the condenser 20, and further improving the pressure of the refrigerant at the first end 401 of the pressure regulating valve 40.

[0092] Optionally, the solenoid valve 62 in the embodiment of the present application may be selected to have different types according to the actual application, for example, the solenoid valve 62 can be a liquid solenoid valve.

[0093] It should be understood that when the pressure of the refrigerant at the first end 401 of the pressure regulating valve 40 in the embodiment of the present application is lower than the preset range, other ways can be used to regulate the pressure of the refrigerant at the first end 401 of the pressure regulating valve 40 in the embodiment of the present application besides regulating the pressure of the refrigerant at the first end 401 of the pressure regulating valve 40 in the embodiment of the present application. pressure The pressure of the refrigerant at the first end 401 of the regulating valve 40 may be increased or adjusted using the regulating assembly 60 in combination with other methods. pressure The pressure of the refrigerant at the first end 401 of the regulator valve 40 may be increased together.

[0094] For example, the amount of refrigerant entering the battery pack 2 can be controlled by the expansion valve 30, and can also be adjusted by the compressor 10, which is an inverter compressor 10. Specifically, when the pressure of the refrigerant at the first end 401 of the pressure regulating valve 40 is lower than a preset range, or when the solenoid valve 62 is fully turned on, the pressure of the refrigerant at the first end 401 of the pressure regulating valve 40 is still lower than a preset range, the operating frequency of the compressor 10 can be reduced, thereby reducing the displacement of the compressor 10, i.e., reducing the compression ratio of the refrigerant in the compressor 10, thereby improving the pressure of the refrigerant at the first end 401 of the pressure regulating valve 40; conversely, the operating frequency of the compressor 10 can also be further increased, for example, by increasing the displacement of the compressor 10, i.e., increasing the compression ratio of the refrigerant in the compressor 10, thereby reducing the pressure of the refrigerant at the first end 401 of the pressure regulating valve 40.

[0095] Therefore, the temperature control equipment 1 in the embodiment of the present application can detect changes in the state of the refrigerant such as the temperature and pressure at each point in the temperature control equipment 1 in real time through the installed pressure regulating valve 40, regulating assembly 60 and detection equipment 50, and can effectively adjust the content of the refrigerant in the battery pack 2, ensure the required temperature of the battery pack 2, achieve the effect of rapid cooling, and effectively avoid waste of resources, thereby improving the operating efficiency of the temperature control equipment 1.

[0096] Although the present application has been described with reference to the preferred embodiments, various modifications can be made thereto and equivalents can be substituted for its components without departing from the scope of the present application. In particular, unless there is a structural conflict, each technical feature mentioned in each embodiment can be combined in any manner. The present application is not limited to the specific embodiments disclosed in the specification, but includes all technical solutions falling within the scope of the claims. [Explanation of symbols]

[0097] 1 Temperature control equipment 2 Battery pack 10 Compressor 11 First connection port 12 Second connection port 20 Condenser 21 Refrigerant outlet 22 Refrigerant inlet 30 Expansion valve 40 Pressure Regulating Valve 50 Detection Equipment 51 First sight glass 52 First Temperature Sensor 53 First pressure sensor 54 Second sight glass 55 Second Temperature Sensor 56 Second pressure sensor 57 Third Temperature Sensor 60 Adjustment Assembly 61 Capillary 62 Solenoid valve 70 Control Unit 81 Liquid Storage Tank 82 Dry Filter 83 Blower 91 First Valve 92 Second Valve 101 Entrance 102 Exit 201 Entrance 202 Exit 301 First Entrance 302 First Exit 303 Second Entrance 304 Second Exit 401 First Edge 402 Second End 621 Entrance 622 Exit 811 Entrance 812 Exit 911 First manual ball valve 912 First pin valve 921 Second manual ball valve 922 Second pin valve

Claims

1. A temperature control device, the temperature control device being used to perform temperature control on a battery pack cooled by a refrigerant, the temperature control device comprising: a first connection port for removably connecting to a refrigerant outlet of a battery pack; a second connection port for removably connecting to a coolant inlet of the battery pack; A compressor; a condenser having an inlet connected to an outlet of the compressor; an expansion valve, a first inlet of the expansion valve being connected to an outlet of the condenser and a first outlet of the expansion valve being connected to the second connection port; a pressure regulating valve, a first end of the pressure regulating valve being connected to the first connection port and a second end of the pressure regulating valve being connected to an inlet of the compressor, the pressure regulating valve adjusting a pressure of a gas discharged from a refrigerant outlet of the battery pack to a pressure value of the gas discharged from the second end of the pressure regulating valve to the inlet of the compressor within a preset range; A temperature control device comprising a detection device connected to the first connection port and / or the second connection port and used to detect a state of the refrigerant at the first connection port and / or the second connection port, the detection device including at least one of a sight glass, a temperature sensor, and a pressure sensor.

2. 2. The temperature control device according to claim 1, wherein the preset range is 300±30 kPa.

3. The temperature control device includes:

3. The temperature control device of claim 1, further comprising an adjustment assembly, the adjustment assembly being used to connect an inlet of the compressor and an outlet of the condenser, the adjustment assembly being used to adjust a proportion of refrigerant entering a first inlet of the expansion valve to refrigerant discharged through the outlet of the condenser.

4. The adjustment assembly includes: When the pressure of the gas at the first end of the pressure regulating valve is higher than the preset range, the proportion of the refrigerant entering the first inlet of the expansion valve relative to the refrigerant discharged through the outlet of the condenser is increased; and / or The temperature control device according to claim 3, characterized in that when the pressure of the gas at the first end of the pressure regulating valve is lower than the preset range, the temperature control device is used to reduce the proportion of refrigerant entering the first inlet of the expansion valve in the refrigerant discharged through the outlet of the condenser.

5. 5. The temperature control device of claim 4, wherein when the pressure of the gas at the first end of the pressure regulating valve is lower than the preset range, the regulating assembly is used to control at least a portion of the refrigerant discharged through the outlet of the condenser to flow to the inlet of the compressor.

6. The temperature control device includes:

5. The temperature management apparatus of claim 4, further comprising a control unit for controlling the regulating assembly in response to a pressure of gas at a first end of the pressure regulating valve.

7. The adjustment assembly includes: Capillary and 4. The temperature control device according to claim 3, further comprising: a solenoid valve, the inlet of which is connected to the outlet of the condenser, and the outlet of which is connected to the inlet of the compressor via the capillary.

8. The detection device includes: a first sight glass disposed between the inlet of the compressor and the pressure regulating valve for monitoring liquid mixed with gas entering the inlet of the compressor; a first temperature sensor disposed between the pressure regulating valve and the first connection port for monitoring a temperature of the refrigerant entering the pressure regulating valve; and a first pressure sensor installed between the pressure regulating valve and the first connection port for monitoring the pressure of the refrigerant entering the pressure regulating valve. The temperature control device according to claim 1 or 2, further comprising at least one of:

9. the expansion valve is an H-type thermal expansion valve, the expansion valve further comprising a second inlet and a second outlet; A temperature control device as described in claim 1 or 2, characterized in that a second inlet of the expansion valve is connected to the first connection port, thereby discharging gas discharged from the refrigerant outlet of the battery pack through the second outlet of the expansion valve, and the expansion valve is used to adjust the refrigerant discharged from the first outlet of the expansion valve in accordance with the gas discharged from the refrigerant outlet of the battery pack.

10. The temperature control device includes: a liquid storage tank, an inlet of the liquid storage tank being connected to an outlet of the condenser, the liquid storage tank being for storing the refrigerant discharged from the outlet of the condenser; a dry filter disposed between an outlet of the liquid storage tank and a first inlet of the expansion valve for filtering impurities in the refrigerant discharged from the outlet of the liquid storage tank; 3. The temperature control device according to claim 1, further comprising a blower for lowering a temperature of the condenser.

11. The detection device includes: a second sight glass disposed between the drying filter and the first inlet of the expansion valve for monitoring a condition of a refrigerant entering the first inlet of the expansion valve; a second temperature sensor disposed between the drying filter and a first inlet of the expansion valve for monitoring a temperature of the refrigerant entering the first inlet of the expansion valve; and a second pressure sensor disposed between the drying filter and a first inlet of the expansion valve for monitoring a pressure of refrigerant entering the first inlet of the expansion valve.

12. The detection device includes:

3. The temperature control device according to claim 1, further comprising a third temperature sensor connected to the battery pack for monitoring an internal temperature of the battery pack.

13. The temperature control device includes: The refrigeration system further includes a first valve and a second valve, the first valve being disposed between an outlet of the condenser and a first inlet of the expansion valve, and the second valve being disposed between the first connection port and an inlet of the compressor; The temperature control device of claim 1 or 2, characterized in that when the first valve and the second valve are off, the battery pack is replaced with another battery pack and connected to the temperature control device, so that when the first valve and the second valve are turned on again, the temperature control device provides temperature control to the battery pack.

14. The temperature control device includes: The temperature management device of claim 13, further comprising a vacuum assembly, the vacuum assembly being used to apply a vacuum to the battery pack after the battery pack and the temperature management device are connected and before the first valve and the second valve are turned on again.

15. 1. A test system comprising: The temperature control device according to claim 1 or 2, and a plurality of battery packs, wherein the temperature control device is used to perform temperature control on the plurality of battery packs, each of which is cooled by a refrigerant, within different time periods and to test the plurality of battery packs.

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