Temperature management equipment and testing systems

Abstract

This application discloses a temperature management device and a testing system. The temperature management device is used to manage the temperature of a battery pack cooled by refrigerant. The device includes: a first interface for detachably connecting to the refrigerant outlet of the battery pack; a second interface for detachably connecting to the refrigerant inlet of the battery pack; a compressor; a condenser; an expansion valve, the first outlet of which is connected to the second interface; and a pressure regulating valve, the first end of which is connected to the first interface, and the second end of which is connected to the compressor inlet. The pressure regulating valve is used to regulate the pressure of the gas discharged from the refrigerant outlet of the battery pack, so that the pressure value of the gas discharged from the second end of the pressure regulating valve to the compressor inlet is within a preset range. The temperature management device and testing system of this application can maintain a stable and suitable temperature for the battery pack during battery pack testing.

Description

Technical Field

[0001] This application relates to the field of batteries, and more specifically, to a temperature management device and testing system. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. In this context, electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the automotive industry's sustainable development. And for electric vehicles, battery technology is a crucial factor in their development.

[0003] In the development of battery technology, besides improving battery performance, safety is also a crucial issue. Before use, batteries undergo extensive testing to ensure their safety and performance. Therefore, providing a stable temperature environment for battery testing is a pressing problem that needs to be solved in the current battery testing process. Summary of the Invention

[0004] This application provides a temperature management device and a testing system that can maintain a stable and suitable temperature for the battery pack during testing.

[0005] In a first aspect, a temperature management device is provided for temperature management of a battery pack cooled by refrigerant. The temperature management device includes: a first interface for detachably connecting to a refrigerant outlet of the battery pack; a second interface for detachably connecting to a refrigerant inlet of the battery pack; a compressor; a condenser, the inlet of which is connected to the outlet of the compressor; an expansion valve, the first inlet of which is connected to the outlet of the condenser, and the first outlet of which is connected to the second interface; a pressure regulating valve, the first end of which is connected to the first interface, and the second end of which is connected to the inlet of the compressor, the pressure regulating valve being used to regulate the pressure of the gas discharged from the refrigerant outlet of the battery pack, so that the pressure value of the gas discharged from the second end of the pressure regulating valve to the inlet of the compressor is within a preset range; and a detection device connected to the first interface and / or the second interface, for detecting the state of the refrigerant at the first interface and / or the second interface, the detection device including at least one of a sight glass, a temperature sensor, and a pressure sensor.

[0006] Therefore, the temperature management device of this application embodiment, after being connected to the battery pack, can form a loop. It circulates refrigerant to the battery pack through a compressor, condenser, expansion valve, and pressure regulating valve. Furthermore, it can detect the state of the refrigerant at corresponding locations using detection equipment, such as the temperature, pressure, and content of the refrigerant. This allows for temperature management of the battery pack connected to the temperature management device, maintaining a relatively stable temperature. This device can be widely used in various battery pack testing processes. In particular, the battery pack generates a large amount of heat during charging and discharging. Therefore, compared to other cooling methods, this application embodiment uses refrigerant to reduce the temperature of the battery pack, resulting in a faster cooling speed.

[0007] In some embodiments, the preset range is 300±30kPa, which can both ensure the working efficiency of the compressor and reduce power consumption.

[0008] In some embodiments, the temperature management device further includes: a regulating component for connecting the inlet of the compressor and the outlet of the condenser, the regulating component for regulating the proportion of refrigerant entering the first inlet of the expansion valve to the proportion of refrigerant discharged through the outlet of the condenser.

[0009] The pressure regulating valve in this embodiment is used to supply gas with a relatively stable pressure value to the compressor. Therefore, when the pressure of the refrigerant discharged from the battery pack does not meet the preset range, it can be adjusted by this regulating component.

[0010] In some embodiments, the regulating component is configured 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 if the pressure of the gas at the first end of the pressure regulating valve is higher than the preset range; and / or, decrease the proportion of refrigerant entering the first inlet of the expansion valve relative to the refrigerant discharged through the outlet of the condenser if the pressure of the gas at the first end of the pressure regulating valve is lower than the preset range.

[0011] This ensures both the cooling efficiency of the refrigerant on the battery pack and avoids waste.

[0012] In some embodiments, if the pressure of the gas at the first end of the pressure regulating valve is lower than the preset range, the regulating component 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, so as to reduce the refrigerant entering the expansion valve and thereby avoid insufficient utilization of the refrigerant in the battery pack.

[0013] In some embodiments, the temperature management device further includes a control unit, which controls the regulating component according to the pressure of the gas at the first end of the pressure regulating valve, thereby achieving high regulation efficiency and avoiding wasted power consumption.

[0014] In some embodiments, the regulating component includes: a capillary tube; 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 through the capillary tube, resulting in a simple circuit that is easy to regulate.

[0015] In some embodiments, the detection device includes at least one of the following: a first sight glass disposed between the inlet of the compressor and the pressure regulating valve for monitoring the liquid mixed in the gas entering the inlet of the compressor; a first temperature sensor disposed between the pressure regulating valve and the first interface for monitoring the temperature of the refrigerant entering the pressure regulating valve; and a first pressure sensor disposed between the pressure regulating valve and the first interface for monitoring the pressure of the refrigerant entering the pressure regulating valve.

[0016] The temperature and pressure of the refrigerant discharged from the battery pack can be used to record this data, and also to adjust other components within the temperature management device based on the detected temperature and pressure. For example, if the discharged refrigerant pressure is lower than a preset value, it can be determined that there is excess refrigerant in the battery pack, thereby reducing the amount of refrigerant entering the battery pack.

[0017] In some embodiments, the expansion valve is an H-type thermostatic expansion valve, and the expansion valve further includes a second inlet and a second outlet. The second inlet of the expansion valve is connected to the first interface so that the gas discharged from the refrigerant outlet of the battery pack is discharged through the second outlet of the expansion valve. The expansion valve is 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.

[0018] The expansion valve can determine whether the refrigerant is being fully utilized in the battery pack based on the state of the refrigerant passing through the second inlet and the second outlet, such as temperature or pressure, and thus increase or decrease the amount of refrigerant discharged from the first outlet of the expansion valve.

[0019] In some embodiments, the temperature management device further includes: a liquid storage tank, the inlet of which is connected to the outlet of the condenser, the liquid storage tank being used to store refrigerant discharged from the outlet of the condenser; a dryer filter, the dryer filter being disposed between the outlet of the liquid storage tank and the first inlet of the expansion valve, for filtering impurities in the refrigerant discharged from the outlet of the liquid storage tank; and a fan for cooling the condenser.

[0020] When the refrigerant discharged from the condenser does not match the actual needs of the battery pack, especially when the condenser discharges an excess of refrigerant, storing the refrigerant in the receiver tank can prevent refrigerant waste. The dryer filter is used to filter impurities from the refrigerant discharged from the receiver tank outlet, improving the cooling effect after the refrigerant enters the battery pack. A fan can be used to cool the condenser, improving its efficiency.

[0021] In some embodiments, the detection device includes at least one of the following: a second sight glass disposed between the dryer filter and the first inlet of the expansion valve for monitoring the state of the refrigerant entering the first inlet of the expansion valve; a second temperature sensor disposed between the dryer filter and the first inlet of the expansion valve for monitoring the temperature of the refrigerant entering the first inlet of the expansion valve; and a second pressure sensor disposed between the dryer filter and the first inlet of the expansion valve for monitoring the pressure of the refrigerant entering the first inlet of the expansion valve.

[0022] The temperature and pressure of the refrigerant discharged through the dryer filter can be obtained, which can be used to record the temperature and pressure data, and can also be used to adjust other components in the temperature management device to improve the cooling efficiency of the battery pack.

[0023] In some embodiments, the detection device further includes a third temperature sensor connected to the battery pack, the third temperature sensor being used to monitor the internal temperature of the battery pack. Based on the temperature measured by the third temperature sensor, if the measured temperature exceeds the required testing temperature or the normal temperature of the battery pack, the temperature management device can be controlled to activate; conversely, if the measured temperature meets the testing requirements or the normal temperature of the battery pack, the temperature management device can be controlled to deactivate, thus avoiding waste.

[0024] In some embodiments, the temperature management device further includes: a first valve and a second valve, the first valve being disposed between the outlet of the condenser and the first inlet of the expansion valve, and the second valve being disposed between the first interface and the inlet of the compressor. When the first valve and the second valve are closed, the battery pack replaces another battery pack and is connected to the temperature management device so that when the first valve and the second valve are reopened, the temperature management device performs temperature management for the battery pack.

[0025] In this way, the battery pack can be replaced by opening and closing the first and second valves without wasting refrigerant discharged from the condenser or introducing impurities into the compressor. Furthermore, after the first and second valves reopen, the temperature management device and the battery pack form a closed loop, in which the internal refrigerant circulates, improving refrigerant efficiency.

[0026] In some embodiments, the temperature management device further includes a vacuum assembly, which is used to: after the battery pack is connected to the temperature management device and before the first valve and the second valve are reopened, to perform a vacuum process on the battery pack to remove excess gas in the battery pack, so that after the first valve and the second valve are reopened, during the temperature management process of the temperature management device on the battery pack, only the refrigerant circulates in the closed loop formed by the temperature management device and the battery pack, avoiding the influence of other gases and improving the cooling effect of the refrigerant.

[0027] In a second aspect, a testing system is provided, comprising: a temperature management device as described in the first aspect or any embodiment of the first aspect, and a plurality of battery packs, wherein the temperature management device is used to perform temperature management on the plurality of battery packs cooled by refrigerant at different times to test the plurality of battery packs. Attached Figure Description

[0028] Figure 1 This is a schematic block diagram of a temperature management device according to one embodiment of this application;

[0029] Figure 2 This is a schematic block diagram of a temperature management device for connecting a battery pack according to one embodiment of this application;

[0030] Figure 3 This is another schematic block diagram of a temperature management device for connecting a battery pack according to one embodiment of this application. Detailed Implementation

[0031] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0034] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0037] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0038] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0039] It should be understood that the batteries in this application embodiment can be used in various electrical devices to provide power to them. These electrical devices can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application embodiment does not impose any special limitations on the above-mentioned electrical devices.

[0040] A battery can also be called a battery pack. To meet different power needs, a battery can include multiple battery cells, which can be connected in series, parallel, or a combination of both. In some embodiments, multiple battery cells can first be connected in series, parallel, or a combination of both to form a battery module, and then multiple battery modules can be connected in series, parallel, or a combination of both to form a battery. That is, multiple battery cells can be directly assembled into a battery, or they can first be assembled into a battery module, and then the battery modules can be assembled into a battery.

[0041] In this application, the battery cell may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application are not limited to these. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited to these. Battery cells are generally divided into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these.

[0042] The battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack. A battery generally includes a housing for encapsulating one or more battery cells. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0043] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrodes. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, and the uncoated positive current collector protrudes beyond the coated one, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the uncoated negative current collector protrudes beyond the coated one, serving as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon, etc. To ensure that a large current can pass through without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together. The separator can be made of polypropylene (PP) or polyethylene (PE), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure, and the embodiments of this application are not limited to these.

[0044] Figure 1 A schematic block diagram of a temperature management device 1 according to an embodiment of this application is shown. The temperature management device 1 of this application is used for temperature management of a battery pack 2 cooled by a refrigerant. Figure 1As shown, the temperature management device 1 includes: a first interface 11 for removably connecting the refrigerant outlet 21 of the battery pack 2; a second interface 12 for removably connecting the refrigerant inlet 22 of the battery pack 2; a compressor 10; a condenser 20, the inlet 201 of which is connected to the outlet 102 of the compressor 10; an expansion valve 30, the first inlet 301 of which is connected to the outlet 202 of the condenser 20, and the first outlet 302 of which is connected to the second interface 12; and a pressure regulating valve 40, the first end 401 of which is connected to the first interface 11. 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 is used to regulate the pressure of the gas discharged from the refrigerant outlet 21 of the battery pack 2, so that 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 is within a preset range. The detection device 50 is connected to the first interface 11 and / or the second interface 12 and is used to detect the state of the refrigerant at the first interface 11 and / or the second interface 12. The detection device 50 includes at least one of a sight glass, a temperature sensor, and a pressure sensor.

[0045] Therefore, the temperature management device 1 in this embodiment, after being connected to the battery pack 2, can form a circuit. It circulates refrigerant to the battery pack 2 through the compressor 10, condenser 20, expansion valve 30, and pressure regulating valve 40. Furthermore, the state of the refrigerant at corresponding locations can be detected by the detection device 50, such as its temperature, pressure, and content. This allows for temperature management of the battery pack 2 connected to the temperature management device 1, maintaining a relatively stable temperature. This system can be widely used in various testing processes of the battery pack 2. In particular, the battery pack 2 generates a large amount of heat during charging and discharging. Therefore, compared to other cooling methods, this embodiment uses refrigerant to lower the temperature of the battery pack 2, resulting in a faster cooling speed.

[0046] The temperature management device 1 of this application embodiment will now be described in detail with reference to the accompanying drawings. Figure 2 This diagram illustrates a schematic block diagram of a temperature management device 1 providing temperature management for a battery pack 2 according to an embodiment of this application. Figure 3 Another schematic block diagram is shown of the temperature management device 1 of this application providing temperature management for the battery pack 2.

[0047] It should be understood that the first interface 22 and the battery pack 2, as well as the second interface 12 and the battery pack 2, are detachably connected in this embodiment, so that the temperature management device 1 can be used to provide temperature management for different battery packs. For example, the temperature management device 1 can manage the temperature of multiple battery packs cooled by refrigerant at different times, and can also test multiple battery packs. The temperature management device 1 is reusable and easy to disassemble and install.

[0048] The temperature management device 1 of this application embodiment can be used in a testing system. This testing system includes the temperature management device 1 and multiple battery packs. The temperature management device 1 is used to manage the temperature of the multiple battery packs, which are cooled by refrigerant, at different times to test the multiple battery packs. Specifically, the testing system of this application embodiment, including the temperature management device 1 and multiple battery packs, can be used for various testing processes. For example, the temperature management device 1 can be used for at least one of the following testing processes for the battery pack 2: mud resistance test, high temperature operating endurance test (HTOE), and seasonal test.

[0049] For example, for a four-season test, the test conditions may include: placing battery pack 2 in an ambient temperature chamber at a constant temperature of 25°C; when the surface temperature of the individual battery cells in battery pack 2 is greater than or equal to 38°C, temperature management device 1 must be turned on until the temperature drops to 35°C, at which point temperature management device 1 can be turned off; the test cycle is one year. The temperature of the individual battery cells can be detected using a negative temperature coefficient thermistor (NTC).

[0050] For example, for HTOE testing, the test conditions typically include: requiring the surface temperature of the individual battery cells within battery pack 2 (e.g., via NTC testing) to be controlled at 50°C ± 2°C, with a continuous testing period of 4 months. Without using temperature management device 1, the NTC detection temperature of battery pack 2 can reach 58°C when connected to a charge / discharge machine, but the maximum temperature of the individual battery cells cannot exceed 57°C. Therefore, temperature management device 1 can be activated at any time when battery pack 2 exceeds the test temperature, and deactivated when the temperature drops to the required test temperature.

[0051] For ease of explanation, this application primarily uses temperature management of any one battery pack 2 as an example. For instance, during testing, the battery pack 2 needs to be maintained at a preset temperature value. This preset temperature value can refer to a specific numerical value or a range of values. For example, in the aforementioned four-season test, the preset temperature value can be set to less than or equal to 38°C. As another example, the dimensions of the battery pack 2 in this embodiment can be 450*650*1200 mm, where the units for length, width, and height are millimeters (mm). However, this embodiment is not limited to these dimensions.

[0052] Specifically, such as Figure 2 and Figure 3 As shown, the temperature management device 1 further includes a first valve 91 and a second valve 92. The first valve 91 is located between the outlet 202 of the condenser 20 and the first inlet 301 of the expansion valve 30, and the second valve 92 is located between the first interface 11 and the inlet 101 of the compressor 10. When the first valve 91 and the second valve 92 are closed, the battery pack 2 replaces another battery pack and connects to the temperature management device 1 so that when the first valve 91 and the second valve 92 are reopened, the temperature management device 1 performs temperature management for the battery pack 2. In this way, the battery pack 2 can be replaced through the closing and opening process of the first valve 91 and the second valve 92, without affecting the waste of refrigerant discharged from the condenser 20 or allowing other impurities to enter the compressor 10. Furthermore, after the first valve 91 and the second valve 92 are reopened, the temperature management device 1 and the battery pack 2 can form a closed loop, in which the internal refrigerant circulates, improving the refrigerant utilization efficiency.

[0053] Optionally, the temperature management device 1 can also be set to a closed state when the first valve 91 and the second valve 92 are closed, for example, by turning off the compressor 10 and / or the condenser 20, which can save power consumption and avoid waste.

[0054] Specifically, the first valve 91 and the second valve 92 in the embodiments of this application can be implemented in various ways, and the first valve 91 and the second valve 92 can be implemented in the same or different ways. For example, the first valve 91 in the embodiments of this application may include a first manual ball valve 911 and / or a first pin valve 912; the second valve 92 may include a second manual ball valve 921 and / or a second pin valve 922. Figure 2 and Figure 3 As shown, the first valve 91 and the second valve 92 can be the same valve for ease of operation.

[0055] For example, such as Figure 2 and Figure 3As shown, 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 closing the first manual ball valve 911 and the second manual ball valve 921, other battery packs can be replaced and the battery pack 2 can be installed, or the battery pack 2 can be unloaded and replaced with other battery packs. Alternatively, the first valve 91 may also include a first pin valve 912, or the second valve 92 may include a second pin valve 922. In this way, after closing the first manual ball valve 911 and the second manual ball valve 921, taking the unloading and replacement of the battery pack 2 with other battery packs as an example, the first pin valve 912 or the second pin valve 922 can be connected through a refrigerant recovery machine to recover the remaining refrigerant in the battery pack 2. After the recovery is completed, the battery pack 2 can be unloaded and replaced with other battery packs, so that the refrigerant can be recycled and reused, avoiding refrigerant waste and environmental pollution.

[0056] Optionally, the temperature management device 1 in this embodiment may further include a vacuum assembly, which is used to: perform a vacuuming process on the battery pack 2 after connecting the battery pack 2 to the temperature management device 1, and before the first valve 91 and the second valve 92 are reopened. Specifically, as Figure 2 and Figure 3 As shown, with the first valve 91 and the second valve 92 closed (i.e., both the first manual ball valve 911 of the first valve 91 and the second manual ball valve 921 of the second valve 92 closed), after the battery pack 2 is connected to the temperature management device 1, the battery pack 2 can be evacuated using the vacuum assembly to remove excess gas. For example, the vacuum assembly can 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 battery pack 2 can be evacuated through the first pin valve 912 and / or the second pin valve 922. Then, after opening the first valve 91 and the second valve 92 (i.e., reopening the first manual ball valve 911 of the first valve 91 and the second manual ball valve 921 of the second valve 92), during the temperature management process of the battery pack 2 by the temperature management device 1, only the refrigerant circulates in the closed loop formed by the temperature management device 1 and the battery pack 2, avoiding the influence of other gases and improving the cooling effect of the refrigerant and the system stability.

[0057] In this embodiment, after vacuuming, the first valve 91 and the second valve 92 are opened. Before activating the temperature management device 1, refrigerant can be added to the circuit formed by the temperature management device 1 and the battery pack 2. Furthermore, after adding the refrigerant, the temperature management device 1 can be activated at any time. For example, if the temperature of the battery pack 2 exceeds the test conditions, the temperature management device 1 can be activated to cool the battery pack 2.

[0058] Optionally, the refrigerant in this application embodiment can be made of various materials. For example, the refrigerant can be 134a refrigerant, which has a better cooling effect on the battery pack 2, but this application embodiment is not limited to this.

[0059] Optionally, the refrigerant in this embodiment can be added at any location of the temperature management device 1. For example, refrigerant is typically added at the low-pressure end or high-pressure end of the compressor 10 so that the temperature management device 1 can be turned on at any time after the refrigerant is added. Alternatively, refrigerant can also be added through the first pin valve 912 of the first valve and / or the second pin valve 922 of the second valve 92; however, this embodiment is not limited to these methods.

[0060] It should be understood that, such as Figure 2 and Figure 3 As shown, in this embodiment of the application, the inlet 101 of the compressor 10 is connected to the refrigerant outlet 21 of the battery pack 2, and can be used to compress the gas discharged through the refrigerant outlet 21 of the battery pack 2. Specifically, the refrigerant cools the battery pack 2 by absorbing heat through the vaporization of the liquid refrigerant, and the refrigerant outlet 21 of the battery pack 2 discharges gas with a higher vaporization temperature. The vaporized gas enters through the inlet 101 of the compressor 10, the compressor 10 can increase the pressure of the gas, and discharge the pressurized high-pressure gas to the condenser 20 through the outlet 102 of the compressor 10.

[0061] Optionally, the compressor 10 in this embodiment can be flexibly selected according to the actual application. For example, the compressor 10 can be a DC inverter compressor and can be powered by alternating current (AC) to direct current (DC) to improve the working efficiency of the compressor 10. However, this embodiment is not limited to this. Specifically, if the compressor 10 is an inverter compressor, the operating frequency of the compressor 10 can be adjusted according to the temperature change of the battery pack 2. For example, during the testing of the battery pack 2, it is necessary to maintain the temperature of the battery pack 2 at a preset temperature value. Then, when the temperature of the battery pack 2 increases significantly compared to the preset temperature value, the operating frequency of the compressor 10 can be increased to quickly reduce the temperature of the battery pack 2; conversely, if the temperature of the battery pack 2 increases only slightly compared to the preset temperature value, the operating frequency of the compressor 10 can be appropriately reduced to avoid wasting the power consumption of the compressor 10 and to avoid resource waste and equipment failure caused by repeatedly turning the temperature management device 1 on and off.

[0062] In the embodiments of this application, such as Figure 2 and Figure 3As shown, the outlet 102 of the compressor 10 is connected to the inlet 201 of the condenser 20, which is used to liquefy the high-temperature, high-pressure gas discharged through the outlet 102 of the compressor 10 to obtain a low-temperature liquid refrigerant.

[0063] Optionally, the condenser 20 in this embodiment can be flexibly selected according to the actual application. For example, the condenser 20 can be a finned condenser to improve its heat dissipation efficiency.

[0064] Optionally, such as Figure 2 and Figure 3 As shown, the temperature management device 1 in this embodiment of the application further includes a fan 83 for cooling the condenser 20 to further improve the efficiency of the condenser 20.

[0065] Optionally, such as Figure 2 and Figure 3 As shown, the temperature management device 1 in this embodiment further includes a liquid storage tank 81. The inlet 811 of the liquid storage tank 81 is connected to the outlet 202 of the condenser 20, and the outlet 812 of the liquid storage tank 81 is connected to a second interface. For example, the outlet 812 of the liquid storage tank 81 can be connected to a first valve 91. The liquid storage tank 81 is used to store the refrigerant discharged from the outlet 202 of the condenser 20. In this way, when the refrigerant discharged from the condenser 20 does not match the actual needs of the battery pack 2, especially when the refrigerant discharged from the condenser 20 is excessive, storing the refrigerant in the liquid storage tank 81 can avoid refrigerant waste.

[0066] Optionally, such as Figure 2 and Figure 3 As shown, the temperature management device 1 in this embodiment further includes a dryer filter 82, which is disposed between the outlet 202 of the condenser 20 and the first inlet 301 of the expansion valve 30. For example, the dryer 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. Alternatively, the dryer filter 82 may be located between the outlet 812 of the liquid storage tank 81 and the first valve 91. The dryer filter 82 is used to filter impurities in the refrigerant discharged from the outlet 812 of the liquid storage tank 81 to improve the cooling effect of the refrigerant after it enters the battery pack 2. For example, the refrigerant may contain impurities such as water.

[0067] Optionally, the detection device 50 in this embodiment may include at least one of the following: a second sight glass 54, disposed between the dryer 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, for example, for observing the content of bubbles in the refrigerant, or for observing the content of water in the refrigerant; a second temperature sensor 55, disposed between the dryer 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, disposed between the dryer 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.

[0068] For example, such as Figure 2 and Figure 3 As shown, in this embodiment of the application, the second sight glass 54, the second temperature sensor 55, and the second pressure sensor 56 can be located between the dryer filter 82 and the first valve 91 to detect the state of the refrigerant at their respective locations. Furthermore, this embodiment of the application does not limit the relative positions of the second sight glass 54, the second temperature sensor 55, and the second pressure sensor 56; the three can be arranged as follows... Figure 2 and Figure 3 The order can be arranged in one order or in other orders.

[0069] Optionally, such as Figure 2 As shown, the temperature management device 1 of this application embodiment may further include a control unit 70, which can be connected to the second temperature sensor 55 and the second pressure sensor 56 to acquire the temperature and pressure of the refrigerant discharged through the dryer filter 82 in a timely manner. This control unit 70 can be used to record the temperature and pressure data, and can also adjust other components within the temperature management device 1 based on the detected temperature and pressure. For clarity, the embodiments of this application... Figure 3 Not shown in the middle Figure 2 The control unit 70 shown.

[0070] It should be understood that the control unit 70 in this application embodiment can be implemented in various ways. For example, the control unit 70 can be a controller, such as a programmable controller (PLC), for controlling the components connected thereto.

[0071] It should be understood that the refrigerant discharged from the condenser 20 in this embodiment can enter the battery pack 2 through the expansion valve 30. Specifically, the expansion valve 30 in this embodiment may include a first inlet 301 and a first outlet 302, wherein the first outlet 302 can serve as a first interface of the temperature management device 1 for connecting the battery pack 2. Specifically, the expansion valve 30 can be used to depressurize the liquid refrigerant discharged from the condenser 20, and the depressurized refrigerant enters the battery pack 2 through the refrigerant inlet 22. When the temperature of the battery pack 2 exceeds the originally preset temperature, for example, when the temperature of the battery pack 2 exceeds the temperature required for testing, the battery pack 2 can be cooled through the vaporization process of the refrigerant inside, and the vaporized gas can be discharged from the refrigerant outlet 21 of the battery pack 2.

[0072] It should be understood that the refrigerant entering the expansion valve 30 is usually a low-temperature, high-pressure refrigerant. For example, the pressure range of the refrigerant is usually 1500 kPa ± 60 kPa. The expansion valve 30 can depressurize the refrigerant. The depressurized refrigerant enters the vacuum battery pack 2 through the refrigerant inlet 22 of the battery pack 2 to cool the battery pack 2.

[0073] Furthermore, the expansion valve 30 can also be used to regulate the amount of refrigerant entering the battery pack 2. For example, when the temperature rise of the battery pack 2 is large, that is, when the temperature of the battery pack 2 is much higher than the preset temperature value, the expansion valve 30 can release more refrigerant; conversely, when the temperature rise of the battery pack 2 is small, less refrigerant is released.

[0074] Optionally, the expansion valve 30 in this embodiment can be selected according to the actual application. For example, the expansion valve 30 can be an H-type thermostatic expansion valve. Specifically, for an H-type thermostatic expansion valve, the expansion valve 30 further includes a second inlet 303 and a second outlet 304. The second inlet 303 of the expansion valve 30 is connected to the first interface 11, or in other words, the second inlet 303 of the expansion valve 30 can serve as the first interface 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. 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 based on the state of the refrigerant passing through the second inlet 303 and the second outlet 304, such as temperature or pressure. The expansion valve 30 may also include a temperature detection structure for sensing or measuring the temperature of the refrigerant passing through the battery pack 2.

[0075] For example, if the temperature increase of battery pack 2 is small, excessive refrigerant will result in the refrigerant in battery pack 2 not being fully utilized. In this case, the temperature of the refrigerant passing through the second inlet 303 of expansion valve 30 will be higher than the preset temperature value, or the pressure will be lower than the preset pressure value. Then, expansion valve 30 can reduce the amount of refrigerant discharged from the first outlet 302 to battery pack 2. Conversely, if there is insufficient refrigerant in battery pack 2, the temperature inside battery pack 2 will be high, and the temperature of the refrigerant at the second inlet 303 of expansion valve 30 will also be higher than the preset temperature value. In this case, expansion valve 30 can increase the amount of refrigerant discharged from the first outlet 302 to battery pack 2.

[0076] Optionally, the temperature of the refrigerant discharged from the battery pack 2 increases. For example, the preset temperature value of the discharged refrigerant can usually be set to 0℃-5℃; the pressure of the discharged refrigerant from the battery pack 2 decreases. For example, the preset pressure value of the discharged refrigerant can usually be set to 300kPa±30kPa, or 300kPa±20kPa, but the embodiments of this application are not limited to this.

[0077] It should be understood that the vaporized gas discharged from the refrigerant outlet 21 of the battery pack 2 in this embodiment may carry some liquid. For example, if the refrigerant is not completely vaporized, the vaporized gas may be mixed with liquid and discharged together. This embodiment is not limited to this.

[0078] Optionally, such as Figure 2 and Figure 3 As shown, the detection device 50 also includes a third temperature sensor 57 connected to the battery pack 2. The third temperature sensor 57 is used to monitor the internal temperature of the battery pack 2. For example, based on the temperature measured by the third temperature sensor 57, if the measured temperature exceeds the required test temperature or the normal temperature of the battery pack 2, the temperature management device 1 can be controlled to turn on; conversely, if the measured temperature meets the test requirements or the normal temperature of the battery pack 2, the temperature management device can be controlled to turn off. Specifically, the third temperature sensor 57 can be connected to the control unit 70 so that the control unit 70 can obtain the internal temperature of the battery pack 2. This temperature value can be used to record experimental data and to adjust the temperature management device 1.

[0079] In this embodiment, the gas discharged from the battery pack 2 can directly enter the compressor 10, or it can enter the compressor 10 through the pressure regulating valve 40. Specifically, the first end 401 of the pressure regulating valve 40 in this embodiment is connected to the refrigerant outlet 21 of the battery pack 2. For example, the first end 401 of the pressure regulating valve 40 can be connected to the second valve 92; 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 can be used to regulate the pressure 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.

[0080] Optionally, the preset range in this application embodiment can be set according to actual application. For example, it can be set according to the working efficiency of the compressor 10. For example, as described above, the preset pressure value of the refrigerant discharged by the battery pack 2 in this application embodiment is usually 300kPa±30kPa, and correspondingly, the preset range can be set to 300±30kPa to ensure the working efficiency of the compressor 10 and reduce power consumption.

[0081] Optionally, the detection device 50 in this embodiment further includes at least one of the following: a first sight glass 51, disposed between the inlet 101 of the compressor 10 and the pressure regulating valve 40, for monitoring the liquid mixed in the gas entering the inlet 101 of the compressor 10; a first temperature sensor 52, disposed between the pressure regulating valve 40 and the first interface 11, for monitoring the temperature of the refrigerant entering the pressure regulating valve 40; and a first pressure sensor 53, disposed between the pressure regulating valve 40 and the first interface 11, for monitoring the pressure of the refrigerant entering the pressure regulating valve 40.

[0082] For example, such as Figure 2 and Figure 3 As shown, the first sight glass 51 in this embodiment is typically disposed between the compressor 10 and the pressure regulating valve 40 to detect the state of liquid mixed in the gas entering the compressor 10. For example, it can be used to observe the state of liquid refrigerant mixed in the gas entering the compressor 10, thereby reducing the amount of liquid refrigerant entering the compressor 10 in time when there is too much liquid refrigerant mixed in the gas entering the compressor 10, so as to avoid excessive low-temperature refrigerant entering the compressor 10, causing excessive icing at the low-pressure end of the compressor 10, and also to avoid liquid slugging accidents in the compressor 10. In this embodiment, the first temperature sensor 52 and the first pressure sensor 53 can be disposed between the pressure regulating valve 40 and the second valve 92 to detect the temperature and pressure of the refrigerant entering the pressure regulating valve 40. Furthermore, this embodiment does not limit the relative order between the first temperature sensor 52 and the first pressure sensor 53. For example, the arrangement order between the first temperature sensor 52 and the first pressure sensor 53 can be as follows: Figure 2and Figure 3 As shown, or, they can be arranged in other orders.

[0083] In some embodiments, the control unit 70 of this application embodiment can be connected to the first temperature sensor 52 and the first pressure sensor 53 to acquire the temperature and pressure of the refrigerant discharged from the battery pack 2 in a timely manner. The acquired temperature and pressure of the refrigerant discharged from the battery pack 2 can be used to record the temperature and pressure data, or to adjust other components within the temperature management device 1 based on the detected temperature and pressure. For example, if the refrigerant discharged from the battery pack 2 is less than a preset pressure value, it is determined that there is excessive refrigerant in the battery pack 2, thereby reducing the amount of refrigerant entering the battery pack 2.

[0084] It should be understood that the second end 402 of the pressure regulating valve 40 in this embodiment can be used to input gas with a pressure value within a preset range to the inlet 101 of the compressor 10. However, the pressure value of the refrigerant at the first end 401 of the pressure regulating valve 40 may not fall within the preset range, thus requiring adjustment of the temperature management device 1. Specifically, the refrigerant pressure at the first end 401 of the pressure regulating valve 40 being lower than the preset range may be caused by various reasons. For example, the temperature of the refrigerant discharged from the condenser 20 may be too low, potentially leading to an excessively low refrigerant pressure at the first end 401 of the pressure regulating valve 40. Another example is the low gas pressure output from the high-pressure end of the compressor 10, i.e., the low pressure of the gas discharged from the outlet 102 of the compressor 10 to the condenser 20, which may also lead to an excessively low refrigerant pressure at the first end 401 of the pressure regulating valve 40. Yet another example is the low temperature of the battery pack 2, which may also lead to an excessively low refrigerant pressure at the first end 401 of the pressure regulating valve 40. Furthermore, the above-mentioned reasons may exist individually or simultaneously.

[0085] If the temperature of the refrigerant entering the compressor 10 is too low, it may cause the low-pressure end temperature of the compressor 10 to be too low, resulting in excessive icing. It may also cause liquid slugging in the compressor 10, leading to compressor 10 malfunction or damage. Therefore, a pressure regulating valve 40 can be installed to prevent the temperature of the refrigerant entering the compressor 10 from being too low.

[0086] For the reasons mentioned above, 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 this embodiment may further include: an adjusting component 60, which is used to connect the inlet 101 of the compressor 10 and the outlet 202 of the condenser 20, and is used to adjust the proportion of refrigerant entering the first inlet 301 of the expansion valve 30 to the proportion of refrigerant discharged through the outlet 202 of the condenser 20. The pressure regulating valve 40 of this embodiment is used to supply gas with a relatively stable pressure value to the compressor 10. Therefore, when the pressure of the refrigerant discharged from the battery pack 2 does not meet the preset range, it can be adjusted by the adjusting component 60.

[0087] For example, the pressure regulating valve 40 in this embodiment can be connected to the control unit 70, and the regulating component 60 can also be connected to the control unit 70. The control unit 70 is used to control the regulating component 60 according to the pressure of the gas at the first end 401 of the pressure regulating valve 40, so as to facilitate timely adjustment of the temperature management device 1, improve cooling efficiency, and avoid waste.

[0088] Specifically, the regulating component 60 in this embodiment can be used to: increase the proportion of refrigerant entering the first inlet 301 of the expansion valve 30 relative to the refrigerant discharged through the outlet 202 of the condenser 20 if the pressure of the gas entering the first end 401 of the pressure regulating valve 40 is higher than a preset range. Specifically, if the pressure of the gas entering the first end 401 of the pressure regulating valve 40 is higher than a preset range, or if 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 problems such as insufficient refrigerant in the battery pack 2. Therefore, the regulating component 60 can be used to increase the refrigerant entering the first inlet 301 of the expansion valve 30 to increase the refrigerant in the battery pack 2, thereby achieving a rapid cooling effect and reducing the gas pressure at the first end 401 of the pressure regulating valve 40.

[0089] The regulating component 60 of this embodiment can also be used to: reduce the proportion of refrigerant entering the first inlet 301 of the expansion valve 30 relative to the refrigerant discharged through the outlet 202 of the condenser 20 if the pressure of the gas entering the first end 401 of the pressure regulating valve 40 is lower than a preset range. Specifically, if the pressure of the gas entering the first end 401 of the pressure regulating valve 40 is lower than a preset range, or if the temperature of the gas entering the first end 401 of the pressure regulating valve 40 is lower than a preset temperature value, it may indicate that there is an excess of refrigerant in the battery pack 2 or that the temperature of the refrigerant in the battery pack 2 is too low. Therefore, the regulating component 60 can be used to reduce the amount of refrigerant entering the first inlet 301 of the expansion valve 30 to reduce the amount of refrigerant in the battery pack 2 and avoid refrigerant waste.

[0090] Optionally, if the pressure of the gas at the first end 401 of the pressure regulating valve 40 is lower than a preset range, the regulating component 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. This can reduce the portion of the refrigerant discharged from the condenser 20 that enters the expansion valve 30, thereby reducing the amount of refrigerant entering the battery pack 2 and avoiding waste.

[0091] It should be understood that the adjustment component 60 in this application embodiment can be configured according to actual application. For example, as Figure 2 and Figure 3 As shown, the regulating component 60 may include: a capillary tube 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 tube 61. This facilitates regulation and simplifies the wiring setup. For example, the solenoid valve 62 in this embodiment has two states: open and closed. Furthermore, the amount of refrigerant flowing through the solenoid valve 62 to the capillary tube 61 can be adjusted by controlling the opening duration or the number of openings of the solenoid valve 62.

[0092] 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 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 closed, or the opening duration or number of openings of the solenoid valve 62 is reduced, so that a large amount of the refrigerant discharged through the condenser 20 enters the expansion valve 30, i.e., the battery pack 2, while less or no refrigerant enters the compressor 10 through the capillary tube 61; conversely, if it is necessary to reduce the amount of refrigerant entering the expansion valve 30 or the battery pack 2, or to reduce the amount of refrigerant entering the expansion valve 30... When the refrigerant at the first inlet 301 accounts for a proportion of the refrigerant discharged through the outlet 202 of the condenser 20, the solenoid valve 62 is opened, or the opening duration or number of openings of the solenoid valve 62 is increased, so that part of the refrigerant discharged through the condenser 20 enters the expansion valve 30, that is, enters the battery pack 2. At the same time, some refrigerant directly enters the compressor 10 through the capillary tube 61, so as 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, thereby increasing the refrigerant pressure at the first end 401 of the pressure regulating valve 40.

[0093] Optionally, the solenoid valve 62 in this embodiment can be selected from different types depending on the actual application. For example, the solenoid valve 62 can be a hydraulic solenoid valve.

[0094] It should be understood that when the refrigerant pressure at the first end 401 of the pressure regulating valve 40 in this embodiment of the application is lower than the preset range, in addition to adjusting by the adjusting component 60, the refrigerant pressure at the first end 401 of the regulating valve 40 can also be increased by other means. Alternatively, when adjusting by the adjusting component 60, other means can be combined to increase the refrigerant pressure at the first end 401 of the regulating valve 40.

[0095] For example, the amount of refrigerant entering the battery pack 2 can be controlled by the expansion valve 30; or, for example, it can be adjusted by the compressor 10, which is a variable frequency compressor 10. Specifically, if the refrigerant pressure at the first end 401 of the pressure regulating valve 40 is lower than a preset range, or if the refrigerant pressure at the first end 401 of the pressure regulating valve 40 is still lower than the preset range when the solenoid valve 62 is fully opened, the operating frequency of the compressor 10 can be reduced to reduce the discharge volume of the compressor 10, that is, to reduce the compression ratio of the refrigerant in the compressor 10, thereby increasing the refrigerant pressure at the first end 401 of the pressure regulating valve 40; conversely, the refrigerant pressure at the first end 401 of the pressure regulating valve 40 can be reduced by increasing the operating frequency of the compressor 10, for example, by increasing the discharge volume of the compressor 10, that is, by increasing the compression ratio of the refrigerant in the compressor 10.

[0096] Therefore, the temperature management device 1 of this application embodiment, through the pressure regulating valve 40, the regulating component 60 and the detection device 50, can not only detect the changes in the temperature and pressure of the refrigerant at various points in the temperature management device 1 in real time, but also effectively regulate the refrigerant content in the battery pack 2. This can not only ensure the required temperature of the battery pack 2 and achieve the effect of rapid cooling, but also effectively avoid resource waste and improve the working efficiency of the temperature management device 1.

[0097] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This 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 temperature management device, characterized by, The temperature management device is used to manage the temperature of a battery pack cooled by a refrigerant, and the temperature management device includes: The first interface is for the refrigerant outlet of the detachable battery pack; The second interface is for the refrigerant inlet of the detachable battery pack; compressor; A condenser, the inlet of which is connected to the outlet of the compressor; An expansion valve, wherein the first inlet of the expansion valve is connected to the outlet of the condenser, and the first outlet of the expansion valve is connected to the second interface; A pressure regulating valve, wherein a first end of the pressure regulating valve is connected to the first interface, and a second end of the pressure regulating valve is connected to the inlet of the compressor, the pressure regulating valve is used to regulate the pressure of the gas discharged from the refrigerant outlet of the battery pack, so that the pressure value of the gas discharged from the second end of the pressure regulating valve to the inlet of the compressor is within a preset range; A detection device, connected to the first interface and / or the second interface, is used to detect the state of the refrigerant at the first interface and / or the second interface, the detection device comprising at least one of a sight glass, a temperature sensor, and a pressure sensor; A regulating assembly for connecting the inlet of the compressor and the outlet of the condenser, the regulating assembly for regulating the proportion of refrigerant entering the first inlet of the expansion valve to the proportion of refrigerant discharged through the outlet of the condenser; The adjustment component is used for: If the gas pressure at the first end of the pressure regulating valve is higher than the preset range, the proportion of refrigerant entering the first inlet of the expansion valve relative to the refrigerant discharged through the outlet of the condenser is increased; and / or, If the pressure of the gas at the first end of the pressure regulating valve is lower than the preset range, the proportion of refrigerant entering the first inlet of the expansion valve relative to the refrigerant discharged through the outlet of the condenser is reduced.

2. The temperature management device of claim 1, wherein, The preset range is 300±30kPa.

3. The temperature management device of claim 1 or 2, wherein, If the pressure of the gas at the first end of the pressure regulating valve is lower than the preset range, the regulating component 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.

4. The temperature management device of claim 3, wherein, The temperature management device also includes: A control unit is configured to control the regulating component based on the pressure of the gas at the first end of the pressure regulating valve.

5. The temperature management device of any of claims 1 to 4, wherein, The adjustment component includes: Capillary; 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 tube.

6. The temperature management device of any of claims 1 to 5, wherein, The detection device includes at least one of the following: A first sight glass is disposed between the inlet of the compressor and the pressure regulating valve for monitoring the liquid mixed in the gas entering the inlet of the compressor. A first temperature sensor is disposed between the pressure regulating valve and the first interface for monitoring the temperature of the refrigerant entering the pressure regulating valve; A first pressure sensor is disposed between the pressure regulating valve and the first interface for monitoring the pressure of the refrigerant entering the pressure regulating valve.

7. The temperature management device of any of claims 1 to 6, wherein, The expansion valve is an H-type thermostatic expansion valve, and it further includes a second inlet and a second outlet. The second inlet of the expansion valve is connected to the first interface so that the gas discharged from the refrigerant outlet of the battery pack is discharged through the second outlet of the expansion valve. The expansion valve is 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.

8. The temperature management device of any of claims 1 to 7, wherein, The temperature management device also includes: A liquid receiver tank, the inlet of which is connected to the outlet of the condenser, is used to store the refrigerant discharged from the outlet of the condenser; A dryer filter is disposed between the outlet of the liquid receiver tank and the first inlet of the expansion valve for filtering impurities in the refrigerant discharged from the outlet of the liquid receiver tank. A fan is used to cool the condenser.

9. The temperature management device according to claim 8, characterized in that, The detection device includes at least one of the following: A second sight glass is disposed between the dryer filter and the first inlet of the expansion valve to monitor the state of the refrigerant entering the first inlet of the expansion valve; A second temperature sensor is disposed between the dryer filter and the first inlet of the expansion valve to monitor the temperature of the refrigerant entering the first inlet of the expansion valve; A second pressure sensor is installed between the dryer filter and the first inlet of the expansion valve to monitor the pressure of the refrigerant entering the first inlet of the expansion valve.

10. The temperature management device according to any one of claims 1 to 9, characterized in that, The detection equipment also includes: A third temperature sensor is connected to the battery pack and is used to monitor the internal temperature of the battery pack.

11. The temperature management device according to any one of claims 1 to 10, characterized in that, The temperature management device also includes: A first valve and a second valve are provided. The first valve is located between the outlet of the condenser and the first inlet of the expansion valve, and the second valve is located between the first inlet and the inlet of the compressor. When the first valve and the second valve are closed, the battery pack replaces another battery pack and is connected to the temperature management device so that when the first valve and the second valve are reopened, the temperature management device manages the temperature of the battery pack.

12. The temperature management device according to claim 11, characterized in that, The temperature management device also includes: A vacuum assembly for evacuating the battery pack after it has been connected to the temperature management device and before the first valve and the second valve are reopened.

13. A testing system, characterized in that, include: Temperature management device according to any one of claims 1 to 12; Multiple battery packs, wherein the temperature management device is used to perform temperature management on the multiple battery packs cooled by refrigerant at different times, in order to test the multiple battery packs.

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