Heat exchange system, battery and control method

Abstract

This invention relates to a heat exchange system, a battery, and a control method, and concerns the field of batteries. The heat exchange system comprises a heat management member, a throttling device, a first temperature sensor, and a pressure sensor. The heat management member has a first medium inlet and a medium outlet. The throttling device communicates with the first medium inlet. The first temperature sensor is for detecting the temperature of the first heat exchange medium at the medium outlet. The pressure sensor is for detecting the pressure of the first heat exchange medium at the medium outlet. The throttling device adjusts the flow rate entering the first medium inlet according to the first temperature sensor and the pressure sensor to create a gas-liquid mixture of the first heat exchange medium in the heat management member. By creating a gas-liquid mixture of the first heat exchange medium in the heat management member, a phase change occurs when the first heat exchange medium exchanges heat with the workpiece, but the temperature does not change. This improves the temperature uniformity of the heat management member, improves the heat management effect on the workpiece, and enhances the reliability of the workpiece.

Description

Technical Field

[0005] , , ,

[0001] (Cross - reference to related applications) This application claims the priority of a Chinese patent application (Application No.: 2023105516519) with the invention title "Heat Exchange System, Battery and Control Method", filed on May 16, 2023, and all the contents of that application are incorporated herein by reference.

[0002] This application relates to the field of batteries, and specifically, to a heat exchange system, a battery, and a control method.

Background Art

[0003] Batteries are being widely used in new energy fields such as electric vehicles and new energy vehicles. Electric vehicles and new energy vehicles have already become a new trend in the development of the automotive industry. To develop battery technology, it is necessary to consider a variety of design elements, such as performance parameters like battery life, energy density, discharge capacity, charge - discharge rate, etc. At the same time, the reliability of the battery also needs to be considered. However, current batteries have low reliability.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The purpose of the embodiments of this application is to provide a heat exchange system, a battery, and a control method to improve the problem of low reliability of batteries in related technologies.

Means for Solving the Problems

[0005] In a first embodiment, the embodiment of the present application provides a heat exchange system comprising: a heat management member having a first medium inlet and a medium outlet; a throttling device communicating with the first medium inlet; a first temperature sensor for detecting the temperature of the first heat exchange medium at the medium outlet; and a pressure sensor for detecting the pressure of the first heat exchange medium at the medium outlet, wherein the throttling device adjusts the flow rate entering the first medium inlet in accordance with the first temperature sensor and the pressure sensor to bring the first heat exchange medium in the heat management member into a gas-liquid mixed state.

[0006] In the above technical means, a first temperature sensor is provided to detect the temperature of the first heat exchange medium at the medium outlet, and a pressure sensor is provided to detect the pressure of the first heat exchange medium at the medium outlet. The state of the first heat exchange medium at the medium outlet is determined based on the temperature and pressure of the first heat exchange medium at the medium outlet. The throttling device is adjusted according to the state of the first heat exchange medium at the medium outlet to increase or decrease the flow rate entering the first medium inlet, thereby creating a gas-liquid mixed state for the first heat exchange medium in the heat management member. In this way, when the first heat exchange medium exchanges heat with the workpiece, the liquid state of the first heat exchange medium can vaporize into a gaseous state, and before and after vaporization, a phase change occurs in the first heat exchange medium, but the temperature does not change. Alternatively, the gaseous state of the first heat exchange medium can liquefy into a liquid state, and before and after liquefaction, a phase change occurs in the first heat exchange medium, but the temperature does not change. If the first heat exchange medium within the heat management component is in a gas-liquid mixed state, the temperature of the first heat exchange medium within the heat management component will not change, improving the temperature uniformity of the heat management component, enhancing the heat management effect on the workpiece, contributing to the workpiece fully demonstrating its performance, and improving the reliability of the workpiece.

[0007] As one selectable technical means of the embodiments of this application, the heat exchange system further comprises a compressor and a condenser, wherein the compressor, the condenser, the throttling device and the heat management member form a circulation circuit.

[0008] In the above technical means, the first heat exchange medium flowing out from the medium outlet is compressed by the compressor to become a high-temperature, high-pressure gas. After passing through the condenser, the high-temperature, high-pressure gas is cooled to become a high-temperature, high-pressure supercooled liquid. After passing through the throttling device, the high-temperature, high-pressure supercooled liquid becomes a low-pressure gas-liquid mixture. The first heat exchange medium in the low-pressure gas-liquid mixture state passes through the first medium inlet and enters the heat exchanger to exchange heat with the workpiece, thereby achieving thermal control for the workpiece. By forming a circulation circuit in the compressor, condenser, throttling device, and thermal control member, circulating flow of the first heat exchange medium is realized, which helps to reduce the consumption of the first heat exchange medium.

[0009] As one selectable technical means of the embodiments of this application, the heat exchange system comprises a heating system arranged to heat the first heat exchange medium flowing out of the medium outlet.

[0010] In the above technical means, the first heat exchange medium flowing out from the medium outlet is in a gas-liquid mixture state or a saturated vapor state. The first heat exchange medium in a gas-liquid mixture state contains liquid itself, and the first heat exchange medium in a saturated vapor state can be partially liquefied into a liquid when it enters the compressor. Whether the first heat exchange medium is in a gas-liquid mixture state or a saturated vapor state, it can cause liquid hammer to the compressor when it enters the compressor, potentially damaging it. By providing a heating system to heat the first heat exchange medium flowing out from the medium outlet, the first heat exchange medium is turned into superheated vapor, reducing the risk of the first heat exchange medium causing liquid hammer to the compressor when it enters the compressor.

[0011] As one selectable technical means in the embodiments of this application, the condenser and the throttling device are connected via a first pipeline, the heat management member and the compressor are connected via a second pipeline, and the heating system comprises a first heat exchanger connected to the first pipeline and the second pipeline, which realizes heat exchange between a first heat exchange medium in the first pipeline and a first heat exchange medium in the second pipeline.

[0012] In the above technical means, the first heat exchange medium in the first pipeline is a high-temperature, high-pressure supercooled liquid, and its temperature is higher than the temperature of the first heat exchange medium flowing out from the medium outlet. By heating the first heat exchange medium flowing out from the medium outlet with the first heat exchange medium in the first pipeline, the first heat exchange medium flowing out from the medium outlet can be heated to superheated steam, and the temperature of the first heat exchange medium entering the throttling device can be further reduced, increasing the degree of supercooling and improving the cooling amount of the heat exchange system.

[0013] As one selectable technical means in an embodiment of the present application, the thermal management member and the compressor are in communication via a second pipeline, the heating system comprises a medium supply system and a first heat exchanger, the medium supply system for supplying a second heat exchange medium to the first heat exchanger, the first heat exchanger is connected to the second pipeline and is arranged to realize heat exchange between the first heat exchange medium and the second heat exchange medium in the second pipeline.

[0014] In the above technical means, the media supply system supplies the second heat exchange medium to the first heat exchanger, and the second heat exchange medium heats the first heat exchange medium in the second pipeline, turning the first heat exchange medium into superheated steam, thereby reducing the risk of liquid hammering the compressor when the first heat exchange medium enters the compressor. By supplying the second heat exchange medium to the first heat exchanger via the media supply system, the flow rate of the second heat exchange medium entering the first heat exchanger can be controlled as needed, and the temperature of the second heat exchange medium can also be controlled as needed, resulting in greater flexibility.

[0015] As one selectable technical means of an embodiment of the present application, the medium supply system comprises a medium storage container for storing the second heat exchange medium and a drive unit, wherein the medium storage container, the drive unit and the first heat exchanger form a circulating circuit.

[0016] In the above technical means, the drive unit drives the second heat exchange medium stored in the medium reservoir to the first heat exchanger, thereby heating the first heat exchange medium in the second pipeline with the second heat exchange medium in the first heat exchanger. By forming a circulation circuit between the medium reservoir, the drive unit, and the first heat exchanger, it is possible to reduce the consumption of the second heat exchange medium.

[0017] As one selectable technical means of the embodiments of this application, the heating system further comprises a second heat exchanger arranged to heat the second heat exchange medium, wherein the second heat exchanger, the medium supply system and the first heat exchanger form a circulation circuit.

[0018] In the above technical means, the second heat exchange medium in the second heat exchanger exchanges heat with other systems to recover heat from those systems, and the recovered heat can heat the first heat exchange medium in the second pipeline. In this way, it helps to reduce the energy consumption of the heat exchange system and lower production costs.

[0019] As one selectable technical means in an embodiment of the present application, the compressor comprises a second medium inlet communicating with the medium outlet, the heat exchange system further comprises a second temperature sensor arranged to detect the temperature of the first heat exchange medium at the second medium inlet, and the medium supply system adjusts the flow rate of the second heat exchange medium passing through the first heat exchanger in accordance with the first and second temperature sensors.

[0020] In the above technical means, by providing a second temperature sensor to detect the temperature at the second medium inlet, it is determined whether the degree of superheating of the first heat exchange medium at the second medium inlet meets the requirement based on the temperature detected by the first temperature sensor and the temperature detected by the second temperature sensor. If the degree of superheating of the first heat exchange medium at the second medium inlet does not meet the requirement, the medium supply system can heat the first heat exchange medium in the second pipeline to a higher temperature by increasing the flow rate of the second heat exchange medium passing through the first heat exchanger.

[0021] As one selectable technical means of an embodiment of the present application, the compressor comprises a second medium inlet communicating with the medium outlet, the heat exchange system further comprises a second temperature sensor arranged to detect the temperature of the first heat exchange medium at the second medium inlet, and the throttling device responds to the second temperature sensor.

[0022] In the above technical means, by providing a second temperature sensor to detect the temperature of the second medium inlet, it is determined whether the degree of superheating of the first heat exchange medium at the second medium inlet meets the requirement based on the temperature detected by the first temperature sensor and the temperature detected by the second temperature sensor. If the degree of superheating of the first heat exchange medium at the second medium inlet does not meet the requirement, it means that the flow rate entering the first medium inlet is too large, and the flow rate entering the first medium inlet can be slightly reduced by a throttling device.

[0023] In a second embodiment, the embodiment of the present application further provides a battery comprising: a battery cell; a box housing the battery cell; and the heat exchange system in which the heat management member is housed within the box and arranged to manage the temperature of the battery cell.

[0024] In a third aspect, an embodiment of the present application further provides a control method based on the heat exchange system described above, which includes the step of adjusting the throttling device to increase the flow rate entering the first medium inlet until T1 ≤ T3 when T1 > T3, where T1 is the temperature detected by the first temperature sensor and T3 is the corresponding saturation temperature of the first heat exchange medium at the pressure detected by the pressure sensor.

[0025] In the above technical means, when the detected temperature of the first temperature sensor is higher than the corresponding saturation temperature at the detected pressure of the pressure sensor of the first heat exchange medium, it means that all of the first heat exchange medium at the medium outlet is in a gaseous state and has absorbed some heat. Therefore, until the detected temperature of the first temperature sensor becomes lower than or equal to the corresponding saturation temperature at the detected pressure of the pressure sensor of the first heat exchange medium, the throttling device can be adjusted to increase the flow rate entering the first medium inlet. When the detected temperature of the first temperature sensor becomes lower than or equal to the corresponding saturation temperature at the detected pressure of the pressure sensor of the first heat exchange medium, it means that the first heat exchange medium at the medium outlet is in a gas-liquid mixed state, or is exactly in a saturated vapor state, and the temperatures of the first heat exchange medium at each location within the heat management member are all equal.

[0026] As an optional technical means in an embodiment of the present application, the heat exchange system further includes a compressor having a second medium inlet communicating with the medium outlet and a condenser. The compressor, the condenser, the throttling device, and the heat management member form a circulation circuit. The heat exchange system includes a heating system arranged to heat the first heat exchange medium flowing out from the medium outlet, and further includes a second temperature sensor arranged to detect the temperature of the first heat exchange medium at the second medium inlet. The control method includes a step of adjusting the throttling device to reduce the flow rate entering the first medium inlet until T1≤T3 and T2 - T1>T when T1≤T3 and T2 - T1≤T, where T2 is the detected temperature of the second temperature sensor and T is the safe superheat degree at the inlet of the compressor.

[0027] In the above technical means, when T1≤T3 and T2 - T1≤T, it means that all of the first heat exchange medium within the heat management member is in a gas-liquid mixed state, but the superheat degree of the first heat exchange medium at the second medium inlet does not meet the requirements, which means that the flow rate entering the first medium inlet is too large. Until T1≤T3 and T2 - T1>T, that is, until all of the first heat exchange medium within the heat management member is in a gas-liquid mixed state and the superheat degree of the first heat exchange medium at the second medium inlet meets the requirements, the flow rate entering the first medium inlet can be slightly reduced by the throttling device.

[0028] As an optional technical means of an embodiment of the present application, the heat exchange system further includes a compressor having a second medium inlet communicating with the medium outlet and a condenser. The compressor, the condenser, the throttling device and the heat management member form a circulation circuit. The heat exchange system includes a heating system arranged to heat the first heat exchange medium flowing out from the medium outlet. The heat management member and the compressor communicate with each other through a second pipeline. The heating system includes a medium supply system and a first heat exchanger. The medium supply system is for providing a second heat exchange medium to the first heat exchanger. The first heat exchanger is connected to the second pipeline and is arranged to realize heat exchange between the first heat exchange medium in the second pipeline and the second heat exchange medium. The heat exchange system further includes a second temperature sensor arranged to detect the temperature of the first heat exchange medium at the second medium inlet. The control method includes a step of adjusting the medium supply system to increase the flow rate of the second heat exchange medium supplied to the first heat exchanger until T2 - T1 > T when T2 - T1 ≤ T. T2 is the detected temperature of the second temperature sensor, and T is the safe superheat degree at the inlet of the compressor.

[0029] In the above technical means, when T2 - T1 ≤ T, it means that the superheat degree of the first heat exchange medium at the second medium inlet does not meet the requirement. The medium supply system increases the flow rate of the second heat exchange medium passing through the first heat exchanger until T2 - T1 > T, that is, until the superheat degree of the first heat exchange medium at the second medium inlet meets the requirement, and the first heat exchange medium in the second pipeline can be heated to a higher temperature.

[0030] As an optional technical means of an embodiment of the present application, the medium supply system includes a medium storage for storing the second heat exchange medium and a driving machine. The medium storage, the driving machine and the first heat exchanger form a circulation circuit. The control method includes a step of increasing the output of the driving machine to increase the flow rate of the second heat exchange medium supplied to the first heat exchanger when T2 - T1 ≤ T.

[0031] In the above technical means, by increasing the output of the drive machine, the flow rate of the second heat exchange medium supplied to the first heat exchanger can be increased, so that the superheat degree of the first heat exchange medium at the second medium inlet meets the requirements, and the adjustment becomes simple and convenient.

[0032] As an optional technical means in the embodiment of the present application, when T2 - T1 > T + ΔT, the control method includes the step of adjusting the medium supply system to reduce the flow rate of the second heat exchange medium supplied to the first heat exchanger until T < T2 - T1 ≤ T + ΔT, where ΔT = 6°C.

[0033] In the above technical means, when T2 - T1 > T + ΔT, it means that the superheat degree of the first heat exchange medium at the second medium inlet is too large, and the energy consumption of the heat exchange system increases. By adjusting the medium supply system to reduce the flow rate of the second heat exchange medium supplied to the first heat exchanger, the superheat degree of the first heat exchange medium at the second medium inlet can be controlled within a predetermined range, thereby reducing the energy consumption of the heat exchange system and the production cost.

Brief Description of the Drawings

[0034] In order to more clearly illustrate the technical means of the embodiments of the present application, the drawings necessary for use in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. Those skilled in the art can conceive of other related drawings based on these drawings without creative effort.

[0035] [Figure 1] It is an exploded view of a battery provided in some embodiments of the present application. [Figure 2] It is a schematic diagram of a heat exchange system provided in some embodiments of the present application. [Figure 3] It is a schematic diagram of a heat exchange system provided in another embodiment of the present application. [Figure 4] It is a schematic diagram of a heat exchange system provided in yet another embodiment of the present application. [Figure 5] This is a schematic diagram of a heat exchange system provided in yet another embodiment of this application. [Figure 6] This is a schematic diagram of a heat exchange system provided in yet another embodiment of this application. [Figure 7] This is a schematic diagram of a heat exchange system provided in yet another embodiment of this application. [Figure 8] This is a schematic diagram of a heat exchange system provided in yet another embodiment of this application. [Figure 9] This is a schematic diagram of a heat exchange system provided in yet another embodiment of this application. [Modes for carrying out the invention]

[0036] To further clarify the purpose, technical means, and advantages of the embodiments of this application, the technical means of the embodiments of this application will be clearly explained below with reference to the drawings of the embodiments of this application. Naturally, the embodiments described are only a part of the embodiments of this application, not all of them. All other embodiments that a person skilled in the art could obtain without creative effort based on the embodiments of this application are all within the scope of protection of this application.

[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those generally understood by those skilled in the art relating to this application. Terms used in the specification of this application are solely for the purpose of describing specific embodiments and are not intended to limit this application. The terms “includes” and “have,” and any variations thereof, in the specification, claims, and the above-mentioned drawings are intended to cover non-exclusive inclusion. Terms such as “first,” “second,” etc., in the specification, claims, or drawings are intended to distinguish different subjects without describing a particular order or primary-secondary relationship.

[0038] Where the “Examples” are referred to in this application, it means that the specific features, structures, or characteristics described in the Examples can be included in at least one Example of this application. The term “Examples” appearing in other parts of the Specification does not necessarily refer to the same Example, nor does it mean that an Example is exclusively independent or alternative to another Example.

[0039] In the description of this application, unless otherwise clearly specified or limited, terms such as "mounting," "connection," "connection," and "accessory connection" should be understood in a broad sense. For example, these may be fixed connections, removable connections, integrated connections, direct connections, indirect connections via an intermediate mediator, or internal communication between two elements. Those skilled in the art will be able to understand the specific meaning of these terms in this application depending on the specific circumstances.

[0040] The term "and / or" in this application is merely used to describe the relationship between related objects, and means that there may be three types of relationships. For example, A and / or B can mean that A exists alone, that A and B exist simultaneously, or that B exists alone. In addition, the symbol " / " in this application generally means that the preceding and following related objects are in an "or" relationship.

[0041] In the embodiments of this application, the same reference numerals indicate the same component, and for the sake of brevity, detailed descriptions of the same component are omitted in different embodiments. It should be understood that the dimensions such as thickness, length, and width of various components in the embodiments of this application shown in the drawings, as well as the overall dimensions such as thickness, length, and width of the integrating device, are illustrative only and do not limit this application in any way.

[0042] In this application, "multiple" refers to two or more (including two).

[0043] 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, and is not limited to these in the embodiments of this application. The battery cell may be cylindrical, flattened, rectangular, or have other shapes, and is not limited to these in the embodiments of this application. Generally, battery cells are classified into three types according to the packaging method: columnar battery cells, prismatic battery cells, and soft-pack type battery cells. This is not limited to these in the embodiments of this application.

[0044] The battery described in the embodiments of this application is a single physical module containing one or more battery cells to provide higher voltage and capacity. For example, the battery described in this application may include a battery module or a battery pack, etc. The battery generally comprises a box for packaging one or more battery cells. The box can, to some extent, prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0045] Currently, market trends indicate that the applications of batteries are expanding. Batteries are not only used in energy storage and power systems such as hydroelectric, thermal, wind, and solar power plants, but also widely applied in many fields including electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, military equipment, and aerospace. As the application fields of batteries expand, market demand is also increasing.

[0046] To advance battery technology, it is necessary to simultaneously consider a wide range of design elements, such as battery life, energy density, discharge capacity, and charge / discharge rate. Battery reliability must also be considered. However, current batteries have low reliability.

[0047] Battery cells generate a large amount of heat during operation, causing their temperature to rise. When the temperature of a battery cell rises to a certain level, it affects its performance. If the temperature continues to rise, thermal runaway becomes more likely, leading to ignition and even explosion. Related technologies use water cooling plates to dissipate heat from the battery cell.

[0048] A water cooling plate has an inlet and an outlet. When water first enters the water cooling plate, its temperature is low, resulting in high heat dissipation for the battery cells. As the water flows to the middle of the water cooling plate or near the outlet, it absorbs heat, its temperature rises, and its heat dissipation effect decreases. In other words, the water cooling plate has a high heat dissipation effect on battery cells near its inlet, but a low heat dissipation effect on battery cells near its outlet. Because the temperature uniformity of the water cooling plate is poor, the battery cells near the outlet cannot effectively dissipate heat, making thermal runaway more likely to occur in the battery cells near the outlet, thus reducing the reliability of current batteries.

[0049] In view of the above, the embodiment of this application provides a heat exchange system comprising a heat management member, a throttling device, a first temperature sensor, and a pressure sensor. The heat management member comprises a first medium inlet and a medium outlet. The throttling device communicates with the first medium inlet. The first temperature sensor is for detecting the temperature of the first heat exchange medium at the medium outlet. The pressure sensor is for detecting the pressure of the first heat exchange medium at the medium outlet. The throttling device adjusts the flow rate entering the first medium inlet in accordance with the first temperature sensor and the pressure sensor to bring the first heat exchange medium in the heat management member into a gas-liquid mixed state.

[0050] A first temperature sensor is provided to detect the temperature of the first heat exchange medium at the medium outlet, and a pressure sensor is provided to detect the pressure of the first heat exchange medium at the medium outlet. By determining the state of the first heat exchange medium at the medium outlet based on its temperature and pressure, the state of the first heat exchange medium at the medium outlet is determined. The throttling device is adjusted according to the state of the first heat exchange medium at the medium outlet to increase or decrease the flow rate entering the first medium inlet, thereby creating a gas-liquid mixture state in the heat management member. In this way, when the first heat exchange medium exchanges heat with the workpiece, the liquid state of the first heat exchange medium can vaporize into a gaseous state, and before and after vaporization, a phase change occurs in the first heat exchange medium, but the temperature does not change. Alternatively, the gaseous state of the first heat exchange medium can liquefy into a liquid state, and before and after liquefaction, a phase change occurs in the first heat exchange medium, but the temperature does not change. If the first heat exchange medium within the heat management component is in a gas-liquid mixed state, the temperature of the first heat exchange medium within the heat management component will not change, improving the temperature uniformity of the heat management component, enhancing the heat management effect on the workpiece, contributing to the workpiece fully demonstrating its performance, and improving the reliability of the workpiece.

[0051] The technical means described in the embodiments of this application are suitable for heat dissipation of a workpiece, and the workpiece may be a battery, battery cell, or the like.

[0052] Please refer to Figure 1, an exploded view of a battery 100 provided in some embodiments of this application. The battery 100 comprises a box 10 and battery cells 20 housed in the box 10. Here, the box 10 is for providing storage space for the battery cells 20 and can employ various structures. In some embodiments, the box 10 may comprise a first part 11 and a second part 12 that, when stacked, together define a storage space for housing the battery cells 20. The second part 12 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure, with the first part 11 stacked on the open side of the second part 12 to define the storage space. The first part 11 and the second part 12 may similarly be hollow structures with one end open, with the open side of the first part 11 stacked on the open side of the second part 12. Of course, the box 10 formed by the first part 11 and the second part 12 may be of various shapes, such as a cylinder or a rectangular prism.

[0053] In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that among the multiple battery cells 20, there are both those connected in series and those connected in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the integrated multiple battery cells 20 may be housed in the box 10. Of course, the battery 100 may also be formed by first connecting multiple battery cells 20 in series, in parallel, or in a mixed connection to form a battery module, and then further integrating the multiple battery modules by connecting them in series, in parallel, or in a mixed connection and housing them in the box 10. The battery 100 may further have other structures; for example, the battery 100 may further include a current collector for realizing electrical connections between the multiple battery cells 20.

[0054] Here, each battery cell 20 may be a secondary battery cell or a primary battery cell, and may be, but is not limited to, a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell. The battery cell 20 may be cylindrical, flattened, rectangular, or have other shapes.

[0055] Refer to Figure 2, a schematic diagram of a heat exchange system 30 provided in some embodiments of this application. Embodiments of this application provide a heat exchange system 30 comprising a heat management member 31, a throttling device 32, a first temperature sensor 33, and a pressure sensor 34. The heat management member 31 comprises a first medium inlet 311 and a medium outlet 312. The throttling device 32 communicates with the first medium inlet 311. The first temperature sensor 33 is for detecting the temperature of the first heat exchange medium at the medium outlet 312. The pressure sensor 34 is for detecting the pressure of the first heat exchange medium at the medium outlet 312. The throttling device 32 adjusts the flow rate entering the first medium inlet 311 in response to the first temperature sensor 33 and the pressure sensor 34 to bring the first heat exchange medium in the heat management member 31 into a gas-liquid mixed state.

[0056] The thermal control member 31 is a component for controlling the temperature of a workpiece within a predetermined range. The thermal control member 31 can cool or heat the workpiece. The thermal control member 31 can contact the workpiece and exchange heat with it in the form of heat conduction. For example, the thermal control member 31 may be a direct cooling plate, and its outer surface may be in close contact with the outer surface of the workpiece. The thermal control member 31 may be provided at a distance from the workpiece and exchange heat with it in the form of convection or thermal radiation. For example, the thermal control member 31 may be the indoor unit of an air conditioner.

[0057] The heat management member 31 includes a first medium inlet 311 for introducing the first heat exchange medium into the heat management member 31, and a medium outlet 312 for releasing the first heat exchange medium from the heat management member 31.

[0058] The first heat exchange medium may be a refrigerant such as Freon, tetrafluoroethane, or trifluoromethane.

[0059] The throttling device 32 is a device for throttling a high-pressure liquid heat exchange medium to convert it into low-pressure moist steam. The throttling device 32 can further control the flow rate entering the first medium inlet 311. The throttling device 32 may also be an expansion valve.

[0060] The first temperature sensor 33 is a device for detecting the temperature of the first heat exchange medium at the medium outlet 312. The first temperature sensor 33 can sense the temperature of the first heat exchange medium and convert it into a usable output signal. The first temperature sensor 33 may be a contact-type temperature sensor such as a resistance thermometer. The first temperature sensor 33 may be a non-contact-type temperature sensor such as a radiation thermometer.

[0061] The pressure sensor 34 is a device for detecting the atmospheric pressure of the first heat exchange medium at the medium outlet 312. The pressure sensor 34 may be a piezoresistive pressure sensor.

[0062] The throttling device 32 may be directly and communicatively connected to the first temperature sensor 33. For example, the throttling device 32 may be connected to the first temperature sensor 33 by wired connection means such as a conductor or cable, and further connected to the first temperature sensor 33 by wireless connection means such as Bluetooth® or a wireless network. The throttling device 32 may be indirectly electrically connected to the first temperature sensor 33 via an intermediate member. For example, the intermediate member may be a controller, and the throttling device 32 may be electrically connected to the controller, and the controller may be electrically connected to the first temperature sensor 33. Similarly, the throttling device 32 may be directly and communicatively connected to the pressure sensor 34. For example, the throttling device 32 may be connected to the pressure sensor 34 by wired connection means such as a conductor or cable, and further connected to the pressure sensor 34 by wireless connection means such as Bluetooth or a wireless network. The throttling device 32 may be indirectly electrically connected to the pressure sensor 34 via an intermediate member. For example, the intermediate component may be a controller, the throttling device 32 is electrically connected to the controller, and the controller is electrically connected to the pressure sensor 34.

[0063] In some embodiments, the throttling device 32 is electrically connected to a first temperature sensor 33 and a pressure sensor 34 via a controller. The controller receives the temperature detected by the first temperature sensor 33 and the pressure detected by the pressure sensor 34, and controls the operation of the throttling device 32 based on the detected temperature and pressure, thereby adjusting the flow rate entering the first medium inlet 311 and bringing the first heat exchange medium in the heat management member 31 into a gas-liquid mixed state.

[0064] If the temperature detected by the first temperature sensor 33 is greater than the corresponding saturation temperature at the pressure detected by the pressure sensor 34 of the first heat exchange medium (saturation temperature refers to the temperature at which a liquid and vapor are in a state of dynamic equilibrium, i.e., a saturated state. In a saturated state, the temperatures of the liquid and vapor are equal. When the saturation temperature is constant, the saturation pressure is also constant. Conversely, when the saturation pressure is constant, the saturation temperature is also constant. When the pressure increases, a new state of dynamic equilibrium is formed at a new temperature. A certain saturation temperature of a substance always corresponds to a certain saturation pressure), it means that the first heat exchange medium at the medium outlet 312 is entirely in a gaseous state and has absorbed some of the heat. For this reason, the throttling device 32 can be adjusted to increase the flow rate entering the first medium inlet 311 until the temperature detected by the first temperature sensor 33 falls below the corresponding saturation temperature at the pressure detected by the pressure sensor 34 of the first heat exchange medium. When the temperature detected by the first temperature sensor 33 falls below the corresponding saturation temperature of the pressure detected by the pressure sensor 34 of the first heat exchange medium, the first heat exchange medium at the medium outlet 312 becomes a gas-liquid mixture, or just saturated vapor, meaning that the temperature of the first heat exchange medium at each point within the heat management member 31 is all the same.

[0065] A first temperature sensor 33 is provided to detect the temperature of the first heat exchange medium at the medium outlet 312, and a pressure sensor 34 is provided to detect the pressure of the first heat exchange medium at the medium outlet 312. By determining the state of the first heat exchange medium at the medium outlet 312 based on its temperature and pressure, the throttling device 32 is adjusted according to the state of the first heat exchange medium at the medium outlet 312 to increase or decrease the flow rate entering the first medium inlet 311, thereby creating a gas-liquid mixed state for the first heat exchange medium in the heat management member 31. In this way, when the first heat exchange medium exchanges heat with the workpiece, the liquid state of the first heat exchange medium can vaporize into a gaseous state, and before and after vaporization, a phase change occurs in the first heat exchange medium, but the temperature does not change. Alternatively, the gaseous state of the first heat exchange medium can liquefy into a liquid state, and before and after liquefaction, a phase change occurs in the first heat exchange medium, but the temperature does not change. If the first heat exchange medium in the heat management member 31 is in a gas-liquid mixed state, the temperature of the first heat exchange medium in the heat management member 31 will not change, improving the temperature uniformity of the heat management member 31, which in turn improves the heat management effect on the workpiece, contributing to the workpiece being able to fully perform its function and improving the reliability of the workpiece.

[0066] Refer to Figure 3, a schematic diagram of a heat exchange system 30 provided in another embodiment of this application. In the other embodiment, the heat exchange system 30 further comprises a compressor 37 and a condenser 35, and the compressor 37, condenser 35, throttling device 32 and heat management member 31 form a circulation circuit.

[0067] The compressor 37 is a driven fluid machine that raises low-pressure gas to high-pressure gas. The condenser 35 is a machine that condenses gas or vapor into a liquid.

[0068] The compressor 37, condenser 35, throttling device 32, and heat management member 31 are connected via a pipeline, thereby enabling the first heat exchange medium to circulate through the compressor 37, condenser 35, throttling device 32, and heat management member 31.

[0069] The first heat exchange medium flowing out from the medium outlet 312 is compressed by the compressor 37 to become a high-temperature, high-pressure gas. After passing through the condenser 35, the high-temperature, high-pressure gas cools to become a high-temperature, high-pressure supercooled liquid (supercooling is a phenomenon in which the temperature of a liquid falls below its freezing point at a given pressure, but the liquid still does not freeze; in this case, the liquid is called a supercooled liquid. The temperature of the high-temperature, high-pressure supercooled liquid is higher than the temperature of the first heat exchange medium at the medium outlet 312). After passing through the throttling device 32, the high-temperature, high-pressure supercooled liquid becomes a low-pressure gas-liquid mixture. The first heat exchange medium in this low-pressure gas-liquid mixture state passes through the first medium inlet 311 and enters the heat exchanger to exchange heat with the workpiece, thereby achieving thermal control for the workpiece.

[0070] By forming a circulation circuit in the compressor 37, condenser 35, throttling device 32, and heat management member 31, circulating flow of the first heat exchange medium is achieved, which helps to reduce the consumption of the first heat exchange medium.

[0071] Refer to Figure 4, a schematic diagram of a heat exchange system 30 provided in yet another embodiment of this application. In yet another embodiment, the heat exchange system 30 includes a heating system 36 arranged to heat the first heat exchange medium flowing out of the medium outlet 312.

[0072] The heating system 36 is for heating the first heat exchange medium flowing out from the medium outlet 312. The heating system 36 can heat the first heat exchange medium flowing out from the medium outlet 312 by at least one heat transfer means among heat conduction, heat radiation, and convection.

[0073] The first heat exchange medium flowing out from the medium outlet 312 is in a gas-liquid mixed state or a saturated steam state. The first heat exchange medium in a gas-liquid mixed state contains liquid itself, and the first heat exchange medium in a saturated steam state can be partially liquefied into a liquid when it enters the compressor 37. Whether the first heat exchange medium is in a gas-liquid mixed state or a saturated steam state, it can cause liquid hammer to the compressor 37 when it enters the compressor 37, potentially damaging it. By providing a heating system 36 to heat the first heat exchange medium flowing out from the medium outlet 312, the first heat exchange medium is converted into superheated steam (superheated steam is dry steam obtained by heating it to saturated steam, from which all the liquid has evaporated, and then continuing to heat it), thereby reducing the risk of liquid hammer to the compressor 37 when the first heat exchange medium enters the compressor 37.

[0074] Please refer to Figure 4, in yet another embodiment, the condenser 35 and the throttling device 32 are connected via a first pipeline 362, and the heat management member 31 and the compressor 37 are connected via a second pipeline 363. The heating system 36 includes a first heat exchanger 361 connected to the first pipeline 362 and the second pipeline 363. The first heat exchanger 361 is for realizing heat exchange between a first heat exchange medium in the first pipeline 362 and a first heat exchange medium in the second pipeline 363.

[0075] The first pipeline 362 connects the condenser 35 and the throttling device 32, and the first heat exchange medium flowing out of the condenser 35 enters the throttling device 32 via the first pipeline 362.

[0076] The second pipeline 363 connects the heat management member 31 and the compressor 37, and the first heat exchange medium flowing out from the heat management member 31 enters the compressor 37 via the second pipeline 363.

[0077] In yet another embodiment, the first heat exchanger 361 is connected to the first pipeline 362 and the second pipeline 363, and heat exchange is realized between the first heat exchange medium in the first pipeline 362 and the first heat exchange medium in the second pipeline 363, thereby heating the first heat exchange medium flowing out from the condenser 35 to heat the first heat exchange medium flowing out from the heat management member 31.

[0078] The first heat exchange medium in the first pipe 362 is a high-temperature, high-pressure supercooled liquid, and its temperature is higher than the temperature of the first heat exchange medium flowing out from the medium outlet 312. By heating the first heat exchange medium flowing out from the medium outlet 312 with the first heat exchange medium in the first pipe 362, the first heat exchange medium flowing out from the medium outlet 312 can be heated to superheated steam, and the temperature of the first heat exchange medium entering the throttling device 32 can be further reduced, increasing the degree of supercooling and improving the cooling amount of the heat exchange system 30.

[0079] Refer to Figure 5, a schematic diagram of a heat exchange system 30 provided in yet another embodiment of this application. In yet another embodiment, a heat management member 31 and a compressor 37 are in communication via a second pipeline 363. The heating system 36 comprises a medium supply system 365 and a first heat exchanger 361, the medium supply system 365 for supplying a second heat exchange medium to the first heat exchanger 361. The first heat exchanger 361 is connected to the second pipeline 363 and is arranged to enable heat exchange between the first heat exchange medium and the second heat exchange medium in the second pipeline 363.

[0080] The medium supply system 365 is a system for supplying a second heat exchange medium to the first heat exchanger 361, and since it is necessary to heat the first heat exchange medium in the second pipe 363, the temperature of the second heat exchange medium should be higher than the temperature of the first heat exchange medium.

[0081] The second heat exchange medium may be a gaseous medium such as air. The second heat exchange medium may be a liquid medium such as water. Of course, the second heat exchange medium may also be a refrigerant.

[0082] In yet another embodiment, the first heat exchanger 361 is connected to the second pipe 363 and is intended to facilitate heat exchange between the first heat exchange medium and the second heat exchange medium in the second pipe 363, with the second heat exchange medium heating the first heat exchange medium in the second pipe 363.

[0083] The medium supply system 365 supplies the second heat exchange medium to the first heat exchanger 361, and the second heat exchange medium heats the first heat exchange medium in the second pipeline 363, turning the first heat exchange medium into superheated steam, thereby reducing the risk of liquid hammering the compressor 37 when the first heat exchange medium enters the compressor 37. By supplying the second heat exchange medium to the first heat exchanger 361 via the medium supply system 365, the flow rate of the second heat exchange medium entering the first heat exchanger 361 can be controlled as needed, and the temperature of the second heat exchange medium can also be controlled as needed, providing greater flexibility.

[0084] Refer to Figure 5 and Figure 6, which is a schematic diagram of a heat exchange system 30 provided in yet another embodiment of this application. In some embodiments, the medium supply system 365 comprises a medium storage container 3652 for storing a second heat exchange medium and a drive unit 3651. The medium storage container 3652, the drive unit 3651 and the first heat exchanger 361 form a circulation circuit.

[0085] The media storage container 3652 is a container for storing the second heat exchange medium. For example, the media storage container 3652 may be a media storage box, a media storage tank, a media storage pool, etc.

[0086] The drive unit 3651 provides power to the flow of the second heat exchange medium. When the second heat exchange medium is a gas, the drive unit 3651 may be an air pump. When the second heat exchange medium is a liquid, the second heat exchange medium is a liquid pump.

[0087] Since the media storage unit 3652, the drive unit 3651, and the first heat exchanger 361 are connected via a pipeline, the second heat exchange medium can circulate through the media storage unit 3652, the drive unit 3651, and the first heat exchanger 361.

[0088] The drive unit 3651 drives the second heat exchange medium stored in the medium storage unit 3652 to the first heat exchanger 361, thereby heating the first heat exchange medium in the second pipeline with the second heat exchange medium in the first heat exchanger 361. By forming a circulation circuit between the medium storage unit 3652, the drive unit 3651, and the first heat exchanger 361, it is possible to reduce the consumption of the second heat exchange medium.

[0089] Refer to Figure 7, a schematic diagram of a heat exchange system 30 provided in yet another embodiment of this application. In yet another embodiment, the heating system 36 further comprises a second heat exchanger 366, and the second heat exchanger 366, a medium supply system 365, and the first heat exchanger 361 form a circulation circuit. The second heat exchanger 366 is arranged to heat the second heat exchange medium.

[0090] The second heat exchanger 366 is designed to exchange heat between the second heat exchange medium and the outside, and to recover heat from the outside. For example, the second heat exchanger 366 can heat the second heat exchange medium by recovering residual heat from the compressor 37, residual heat from the motor, residual heat from the condensing air side, etc.

[0091] Since the second heat exchanger 366, the medium supply system 365, and the first heat exchanger 361 are connected via a pipeline, the second heat exchange medium can circulate through the second heat exchanger 366, the medium supply system 365, and the first heat exchanger 361.

[0092] The second heat exchange medium in the second heat exchanger 366 exchanges heat with other systems to recover heat from those systems, and the recovered heat can heat the first heat exchange medium in the second pipeline. In this way, it helps to reduce the energy consumption of the heat exchange system 30 and lowers production costs.

[0093] Refer to Figure 8, a schematic diagram of a heat exchange system 30 provided in yet another embodiment of this application. In yet another embodiment, the compressor 37 includes a second medium inlet 371 communicating with a medium outlet 312. The heat exchange system 30 further includes a second temperature sensor 38 positioned to detect the temperature of the first heat exchange medium at the second medium inlet 371. The medium supply system 365 adjusts the flow rate of the second heat exchange medium passing through the first heat exchanger 361 in response to the first temperature sensor 33 and the second temperature sensor 38.

[0094] The second medium inlet 371 is for introducing the first heat exchange medium into the compressor 37. The second medium inlet 371 communicates with the medium outlet 312 via the second pipe.

[0095] The second temperature sensor 38 is a device for detecting the temperature of the first heat exchange medium at the second medium inlet 371. The second temperature sensor 38 can sense the temperature of the first heat exchange medium and convert it into a usable output signal. The second temperature sensor 38 may be a contact-type temperature sensor, such as a resistance thermometer. The second temperature sensor 38 may be a non-contact-type temperature sensor, such as an infrared thermometer.

[0096] The medium supply system 365 may be directly and communicatively connected to the first temperature sensor 33. For example, the medium supply system 365 may be connected to the first temperature sensor 33 by wired connection means such as conductors or cables, and further connected to the first temperature sensor 33 by wireless connection means such as Bluetooth or a wireless network. The medium supply system 365 may be indirectly electrically connected to the first temperature sensor 33 via an intermediate member. For example, the intermediate member may be a controller, and the medium supply system 365 may be electrically connected to the controller, and the controller may be electrically connected to the first temperature sensor 33. Similarly, the medium supply system 365 may be directly and communicatively connected to the second temperature sensor 38. For example, the medium supply system 365 may be connected to the second temperature sensor 38 by wired connection means such as conductors or cables, and further connected to the second temperature sensor 38 by wireless connection means such as Bluetooth or a wireless network. The medium supply system 365 may be indirectly electrically connected to the second temperature sensor 38 via an intermediate member. For example, the intermediate component may be a controller, the medium supply system 365 is electrically connected to the controller, and the controller is electrically connected to the second temperature sensor 38.

[0097] In some embodiments, the medium supply system 365 is electrically connected to a first temperature sensor 33 and a second temperature sensor 38 via a controller. The controller receives the temperatures detected by the first temperature sensor 33 and the second temperature sensor 38, and controls the operation of the medium supply system 365 based on these temperatures, thereby adjusting the flow rate of the second heat exchange medium passing through the first heat exchanger 361.

[0098] If the difference between the temperature detected by the second temperature sensor 38 and the temperature detected by the first temperature sensor 33 falls below the safe superheat level at the compressor 37 inlet, it means that the superheat level of the first heat exchange medium at the second medium inlet 371 (superheat level refers to the difference between the superheat temperature and the saturation temperature of the first heat exchange medium at the same pressure) is less than the safe superheat level at the compressor 37 inlet. By adjusting the medium supply system 365 to increase the flow rate of the second heat exchange medium passing through the first heat exchanger 361, the first heat exchange medium flowing out from the medium outlet 312 can be heated to a higher temperature, making the superheat level of the first heat exchange medium at the second medium inlet 371 greater than or equal to the safe superheat level at the compressor 37 inlet.

[0099] By providing a second temperature sensor 38 to detect the temperature of the second medium inlet 371, the superheating degree of the first heat exchange medium at the second medium inlet 371 is determined based on the temperature detected by the first temperature sensor 33 and the temperature detected by the second temperature sensor 38. If the superheating degree of the first heat exchange medium at the second medium inlet 371 does not meet the requirements, the medium supply system 365 increases the flow rate of the second heat exchange medium passing through the first heat exchanger 361 to heat the first heat exchange medium in the second pipeline to a higher temperature, thereby reducing the risk of liquid hammering the compressor 37 when the first heat exchange medium enters the compressor 37.

[0100] Refer to Figure 9, a schematic diagram of a heat exchange system 30 provided in yet another embodiment of this application. In yet another embodiment, the compressor 37 includes a second medium inlet 371 communicating with a medium outlet 312. The heat exchange system 30 further includes a second temperature sensor 38 positioned to detect the temperature of the first heat exchange medium at the second medium inlet 371. A throttling device 32 responds to the second temperature sensor 38.

[0101] The throttling device 32 may be directly and communicatively connected to the second temperature sensor 38. For example, the throttling device 32 may be connected to the second temperature sensor 38 by wired connection means such as a wire or cable, and further connected to the second temperature sensor 38 by wireless connection means such as Bluetooth or a wireless network. The throttling device 32 may also be electrically connected indirectly to the second temperature sensor 38 via an intermediate member. For example, the intermediate member may be a controller, and the throttling device 32 may be electrically connected to the controller, and the controller may be electrically connected to the second temperature sensor 38.

[0102] In some embodiments, the throttling device 32 is electrically connected to a first temperature sensor 33, a second temperature sensor 38, and a pressure sensor 34, respectively, via a controller. The controller receives the temperature detected by the first temperature sensor 33, the temperature detected by the second temperature sensor 38, and the pressure detected by the pressure sensor 34, and controls the operation of the throttling device 32 based on the temperature detected by the first temperature sensor 33, the temperature detected by the second temperature sensor 38, and the pressure detected by the pressure sensor 34, thereby adjusting the flow rate entering the first medium inlet 311.

[0103] By providing a second temperature sensor 38 to detect the temperature of the second medium inlet 371, it is determined whether the degree of superheating of the first heat exchange medium at the second medium inlet 371 meets the requirements based on the temperature detected by the first temperature sensor 33 and the temperature detected by the second temperature sensor 38. If the degree of superheating of the first heat exchange medium at the second medium inlet 371 does not meet the requirements, it means that the flow rate entering the first medium inlet 311 is too high, and the throttling device 32 can slightly reduce the flow rate entering the first medium inlet 311.

[0104] Embodiments of this application further provide a battery 100 comprising a battery cell 20, a box 10 housing the battery cell 20, and the heat exchange system 30. The heat management member 31 is housed within the box 10 and is positioned to manage the temperature of the battery cell 20.

[0105] Embodiments of this application further provide a control method based on the heat exchange system 30 described above, which includes the step of adjusting the throttling device 32 to increase the flow rate entering the first medium inlet 311 until T1 ≤ T3, when T1 > T3. T1 is the temperature detected by the first temperature sensor 33, and T3 is the corresponding saturation temperature at the pressure detected by the pressure sensor 34 of the first heat exchange medium.

[0106] If the temperature detected by the first temperature sensor 33 is greater than the corresponding saturation temperature at the pressure detected by the pressure sensor 34 of the first heat exchange medium, it means that the first heat exchange medium at the medium outlet 312 is entirely in a gaseous state and has absorbed some heat. For this reason, the throttling device 32 can be adjusted to increase the flow rate entering the first medium inlet 311 until the temperature detected by the first temperature sensor 33 falls below the corresponding saturation temperature at the pressure sensor 34 of the first heat exchange medium. When the temperature detected by the first temperature sensor 33 falls below the corresponding saturation temperature at the pressure sensor 34 of the first heat exchange medium, it means that the first heat exchange medium at the medium outlet 312 is in a gas-liquid mixture state, or just saturated vapor state, and that the temperature of the first heat exchange medium at each point in the heat management member 31 is all the same.

[0107] In some embodiments, the heat exchange system 30 further comprises a compressor 37 and a condenser 35, where the compressor 37, condenser 35, throttling device 32 and thermal management member 31 form a circulation circuit. The heat exchange system 30 includes a heating system 36 arranged to heat the first heat exchange medium flowing out of a medium outlet 312. The compressor 37 includes a second medium inlet 371 communicating with the medium outlet 312. The heat exchange system 30 further includes a second temperature sensor 38 arranged to detect the temperature of the first heat exchange medium at the second medium inlet 371. The control method includes the step of adjusting the throttling device 32 to reduce the flow rate entering the first medium inlet 311 until T1 ≤ T3 and T2-T1 > T, where T1 ≤ T3 and T2-T1 ≤ T, and T2 is the temperature detected by the second temperature sensor 38 and T is the safe superheat level at the inlet of the compressor 37.

[0108] The degree of superheating refers to the difference between the superheating temperature and the saturation temperature of a heat exchange medium at the same pressure. For example, if the superheating temperature is 105°C and the saturation temperature is 100°C, the degree of superheating is 5°C.

[0109] The safe superheat level at the compressor 37 inlet is determined during the manufacturing of the compressor 37. If the temperature of the first heat exchange medium at the second medium inlet 371 is higher than the safe superheat level, the risk of the first heat exchange medium causing liquid hammer to the compressor 37 is small.

[0110] When T1 ≤ T3 and T2 - T1 ≤ T, the first heat exchange medium in the heat management member 31 is entirely in a gas-liquid mixed state, but the degree of superheating of the first heat exchange medium at the second medium inlet 371 does not meet the requirements, meaning that the flow rate entering the first medium inlet 311 is too large. The throttling device 32 can slightly reduce the flow rate entering the first medium inlet 311 until T1 ≤ T3 and T2 - T1 > T, that is, until the first heat exchange medium in the heat management member 31 is entirely in a gas-liquid mixed state and the degree of superheating of the first heat exchange medium at the second medium inlet 371 meets the requirements.

[0111] In another embodiment, the heat exchange system 30 further comprises a compressor 37 and a condenser 35, and the compressor 37, condenser 35, throttling device 32 and heat management member 31 form a circulation circuit. The heat exchange system 30 includes a heating system 36 arranged to heat the first heat exchange medium flowing out from the medium outlet 312. The heat management member 31 and the compressor 37 are in communication via a second conduit 363. The heating system 36 includes a medium supply system 365 and a first heat exchanger 361, the medium supply system 365 for supplying a second heat exchange medium to the first heat exchanger 361. The first heat exchanger 361 is connected to the second conduit 363 and is arranged to realize heat exchange between the first heat exchange medium and the second heat exchange medium in the second conduit 363. The compressor 37 includes a second medium inlet 371 that communicates with the medium outlet 312. The heat exchange system 30 further includes a second temperature sensor 38 positioned to detect the temperature of the first heat exchange medium at the second medium inlet 371. The control method includes, when T2-T1 ≤ T, adjusting the medium supply system 365 to increase the flow rate of the second heat exchange medium supplied to the first heat exchanger 361 until T2-T1 > T, where T2 is the temperature detected by the second temperature sensor 38 and T is the safe superheat level at the inlet of the compressor 37.

[0112] If T2-T1≦T, it means that the superheating of the first heat exchange medium at the second medium inlet 371 does not meet the requirement, and the medium supply system 365 can increase the flow rate of the second heat exchange medium passing through the first heat exchanger 361 and heat the first heat exchange medium in the second pipe to a higher temperature until T2-T1>T, that is, until the superheating of the first heat exchange medium at the second medium inlet 371 meets the requirement.

[0113] In some embodiments, the medium supply system 365 comprises a medium storage container 3652 for storing a second heat exchange medium and a drive unit 3651, wherein the medium storage container 3652, the drive unit 3651 and the first heat exchanger 361 form a circulating circuit. The control method includes the step of increasing the output of the drive unit 3651 to increase the flow rate of the second heat exchange medium supplied to the first heat exchanger 361 when T2-T1≦T.

[0114] As the drive 3651, an inverter pump may be used, and its output is easy to adjust.

[0115] By increasing the output of the drive 3651, the flow rate of the second heat exchange medium supplied to the first heat exchanger 361 can be increased, and the superheat degree of the first heat exchange medium at the second medium inlet 371 can meet the requirements, making the adjustment simple and convenient.

[0116] In some embodiments, the control method includes the step of adjusting the medium supply system 365 to reduce the flow rate of the second heat exchange medium supplied to the first heat exchanger 361 until T < T2 - T1 ≤ T + ΔT when T2 - T1 > T + ΔT. ΔT = 6°C.

[0117] When T2 - T1 > T + ΔT, it means that the superheat degree of the first heat exchange medium at the second medium inlet 371 is too large, and the energy consumption of the heat exchange system 30 increases. By adjusting the medium supply system 365 to reduce the flow rate of the second heat exchange medium supplied to the first heat exchanger 361, the superheat degree of the first heat exchange medium at the second medium inlet 371 is controlled within a predetermined range, thereby reducing the energy consumption of the heat exchange system 30 and reducing the production cost.

[0118] For some embodiments according to this application, please refer to FIGS. 2 to 9.

[0119] The embodiment of this application provides a heat exchange system 30 comprising a compressor 37, a condenser 35, a heat management member 31, a throttling device 32, a first temperature sensor 33, and a pressure sensor 34. The compressor 37, condenser 35, throttling device 32, and heat management member 31 form a circulation circuit. The heat management member 31 includes a first medium inlet 311 and a medium outlet 312. The throttling device 32 communicates with the first medium inlet 311. The first temperature sensor 33 is for detecting the temperature of the first heat exchange medium at the medium outlet 312. The pressure sensor 34 is for detecting the pressure of the first heat exchange medium at the medium outlet 312. The throttling device 32 adjusts the flow rate entering the first medium inlet 311 in response to the first temperature sensor 33 and the pressure sensor 34 to bring the first heat exchange medium in the heat management member 31 into a gas-liquid mixed state. A first temperature sensor 33 is provided to detect the temperature of the first heat exchange medium at the medium outlet 312, and a pressure sensor 34 is provided to detect the pressure of the first heat exchange medium at the medium outlet 312. By determining the state of the first heat exchange medium at the medium outlet 312 based on its temperature and pressure, the throttling device 32 is adjusted according to the state of the first heat exchange medium at the medium outlet 312 to increase or decrease the flow rate entering the first medium inlet 311, thereby creating a gas-liquid mixed state for the first heat exchange medium in the heat management member 31. In this way, when the first heat exchange medium exchanges heat with the workpiece, the liquid state of the first heat exchange medium can vaporize into a gaseous state, and before and after vaporization, a phase change occurs in the first heat exchange medium, but the temperature does not change. Alternatively, the gaseous state of the first heat exchange medium can liquefy into a liquid state, and before and after liquefaction, a phase change occurs in the first heat exchange medium, but the temperature does not change. If the first heat exchange medium in the heat management member 31 is in a gas-liquid mixed state, the temperature of the first heat exchange medium in the heat management member 31 will not change, improving the temperature uniformity of the heat management member 31, which in turn improves the heat management effect on the workpiece, contributing to the workpiece being able to fully perform its function and improving the reliability of the workpiece.

[0120] The heat exchange system 30 includes a heating system 36 positioned to heat the first heat exchange medium flowing out from the medium outlet 312. The condenser 35 and the throttling device 32 are connected via a first conduit 362, and the heat management member 31 and the compressor 37 are connected via a second conduit 363. The heating system 36 is connected to the first conduit 362 and the second conduit 363 and includes a first heat exchanger 361 that enables heat exchange between the first heat exchange medium in the first conduit 362 and the first heat exchange medium in the second conduit 363. The first heat exchange medium in the first conduit 362 is a high-temperature, high-pressure supercooled liquid whose temperature is higher than that of the first heat exchange medium flowing out from the medium outlet 312. By heating the first heat exchange medium flowing out of the medium outlet 312 with the first heat exchange medium in the first pipe 362, the first heat exchange medium flowing out of the medium outlet 312 can be heated to superheated steam, and the temperature of the first heat exchange medium entering the throttling device 32 can be further reduced, increasing the degree of supercooling and improving the cooling amount of the heat exchange system 30.

[0121] In some embodiments, the compressor 37 includes a second medium inlet 371 communicating with a medium outlet 312, the heat exchange system 30 further includes a second temperature sensor 38 positioned to detect the temperature of the first heat exchange medium at the second medium inlet 371, and the medium supply system 365 adjusts the flow rate of the second heat exchange medium passing through the first heat exchanger 361 in accordance with the first temperature sensor 33 and the second temperature sensor 38. By providing the second temperature sensor 38 to detect the temperature of the second medium inlet 371, the temperature detected by the first temperature sensor 33 and the temperature detected by the second temperature sensor 38 determines whether the degree of superheating of the first heat exchange medium at the second medium inlet 371 meets the requirements. If the degree of superheating of the first heat exchange medium at the second medium inlet 371 does not meet the requirements, the medium supply system 365 can heat the first heat exchange medium in the second pipeline to a higher temperature by increasing the flow rate of the second heat exchange medium passing through the first heat exchanger 361.

[0122] The heat management member 31 and the compressor 37 are connected via a second pipeline 363. The heating system 36 includes a medium supply system 365 and a first heat exchanger 361. The medium supply system 365 provides a second heat exchange medium to the first heat exchanger 361. The first heat exchanger 361 is connected to the second pipeline 363 and is arranged to enable heat exchange between the first and second heat exchange mediums in the second pipeline 363. The medium supply system 365 supplies the second heat exchange medium to the first heat exchanger 361, and the second heat exchange medium heats the first heat exchange medium in the second pipeline 363, turning the first heat exchange medium into superheated steam, thereby reducing the risk of liquid hammering the compressor 37 when the first heat exchange medium enters the compressor 37. By supplying the second heat exchange medium to the first heat exchanger 361 via the medium supply system 365, the flow rate of the second heat exchange medium entering the first heat exchanger 361 can be controlled as needed, and the temperature of the second heat exchange medium can also be controlled as needed, resulting in greater flexibility.

[0123] The compressor 37 is equipped with a second medium inlet 371 that communicates with a medium outlet 312, and the heat exchange system 30 further includes a second temperature sensor 38 positioned to detect the temperature of the first heat exchange medium at the second medium inlet 371, and the throttling device 32 responds to the second temperature sensor 38. By providing the second temperature sensor 38 to detect the temperature of the second medium inlet 371, the temperature detected by the first temperature sensor 33 and the temperature detected by the second temperature sensor 38 determine whether the degree of superheating of the first heat exchange medium at the second medium inlet 371 meets the requirements. If the degree of superheating of the first heat exchange medium at the second medium inlet 371 does not meet the requirements, it means that the flow rate entering the first medium inlet 311 is too high, and the throttling device 32 can slightly reduce the flow rate entering the first medium inlet 311.

[0124] An embodiment of this application further provides a control method based on the heat exchange system 30 described above, which includes the step of adjusting the throttling device 32 to increase the flow rate entering the first medium inlet 311 until T1 ≤ T3, when T1 > T3, where T1 is the temperature detected by the first temperature sensor 33 and T3 is the corresponding saturation temperature of the first heat exchange medium at the pressure detected by the pressure sensor 34. When the temperature detected by the first temperature sensor 33 is greater than the corresponding saturation temperature of the first heat exchange medium at the pressure detected by the pressure sensor 34, it means that the first heat exchange medium at the medium outlet 312 is entirely in a gaseous state and has absorbed some heat. For this reason, the throttling device 32 can be adjusted to increase the flow rate entering the first medium inlet 311 until the temperature detected by the first temperature sensor 33 is less than or equal to the corresponding saturation temperature of the first heat exchange medium at the pressure detected by the pressure sensor 34. When the temperature detected by the first temperature sensor 33 falls below the corresponding saturation temperature of the pressure detected by the pressure sensor 34 of the first heat exchange medium, the first heat exchange medium at the medium outlet 312 becomes a gas-liquid mixture, or just saturated vapor, meaning that the temperature of the first heat exchange medium at each point within the heat management member 31 is all the same.

[0125] The foregoing are merely preferred embodiments of this application and are not intended to limit it. Those skilled in the art can make various modifications and changes to this application. Any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and principles of this application shall be included within the scope of the claims of this application. [Explanation of Symbols]

[0126] 10 boxes 11 Part 1 12 Part 2 20 battery cells 30 Heat exchange systems 31 Thermal Management Components 311 1st medium entrance 312 Media outlet 32 Throttling device 33. First temperature sensor 34 Pressure Sensor 35 Condenser 36 Heating System 361 1st heat exchanger 362 1st pipeline 363 2nd pipeline 365 media supply system 3651 Drive unit 3652 Media storage unit 366 Second heat exchanger 37 Compressor 371 2nd medium inlet 38. Second temperature sensor 100 batteries

Claims

1. A thermal control member having a first medium inlet and a medium outlet, A throttling device communicating with the first medium inlet, A first temperature sensor for detecting the temperature of the first heat exchange medium at the medium outlet, The system includes a pressure sensor for detecting the pressure of the first heat exchange medium at the medium outlet, The throttling device is a heat exchange system that adjusts the flow rate entering the first medium inlet in accordance with the first temperature sensor and the pressure sensor to bring the first heat exchange medium in the heat management member into a gas-liquid mixed state.

2. The heat exchange system according to claim 1, further comprising a compressor and a condenser, wherein the compressor, the condenser, the throttling device and the heat management member form a circulation circuit.

3. The heat exchange system according to claim 2, further comprising a heating system arranged to heat the first heat exchange medium flowing out from the medium outlet.

4. The condenser and the throttling device are connected via a first pipeline, and the heat management member and the compressor are connected via a second pipeline. The heat exchange system according to claim 3, wherein the heating system comprises a first heat exchanger connected to the first pipeline and the second pipeline, which realizes heat exchange between the first heat exchange medium in the first pipeline and the first heat exchange medium in the second pipeline.

5. The heat management member and the compressor are connected via a second pipeline. The heat exchange system according to claim 3, wherein the heating system comprises a medium supply system and a first heat exchanger, the medium supply system is for supplying a second heat exchange medium to the first heat exchanger, and the first heat exchanger is connected to a second pipeline and arranged to realize heat exchange between the first heat exchange medium and the second heat exchange medium in the second pipeline.

6. The heat exchange system according to claim 5, wherein the medium supply system comprises a medium storage container for storing the second heat exchange medium and a drive unit, and the medium storage container, the drive unit and the first heat exchanger form a circulation circuit.

7. The heating system further comprises a second heat exchanger arranged to heat the second heat exchange medium, wherein the second heat exchanger, the medium supply system and the first heat exchanger form a circulation circuit, according to claim 5 or 6.

8. The compressor is equipped with a second medium inlet that communicates with the medium outlet, The heat exchange system according to any one of claims 5 to 7, further comprising a second temperature sensor arranged to detect the temperature of the first heat exchange medium at the second medium inlet, and the medium supply system adjusting the flow rate of the second heat exchange medium passing through the first heat exchanger in accordance with the first temperature sensor and the second temperature sensor.

9. The compressor is equipped with a second medium inlet that communicates with the medium outlet, The heat exchange system according to any one of claims 3 to 7, further comprising a second temperature sensor arranged to detect the temperature of the first heat exchange medium at the second medium inlet, and the throttling device responding to the second temperature sensor.

10. Battery cell and A box for housing the aforementioned battery cells, A battery comprising a heat exchange system according to any one of claims 1 to 9, wherein the heat management member is housed in the box and arranged to manage the temperature of the battery cell.

11. Based on the heat exchange system described in any one of claims 1 to 9, T １ >T ３ In the case of T １ ≦T ３ The step includes adjusting the throttling device to increase the flow rate entering the first medium inlet until the following occurs: T １ is the temperature detected by the first temperature sensor, and T ３ A control method wherein is the corresponding saturation temperature of the first heat exchange medium at the pressure detected by the pressure sensor.

12. The heat exchange system further comprises a compressor having a second medium inlet communicating with the medium outlet, and a condenser, wherein the compressor, the condenser, the throttling device, and the heat management member form a circulation circuit, and the heat exchange system further comprises a heating system arranged to heat the first heat exchange medium flowing out from the medium outlet, and a second temperature sensor arranged to detect the temperature of the first heat exchange medium at the second medium inlet. The control method described above is T １ ≤ T ３ and T ２ -T １ When ≤ T and T - T ≤ T, T １ ≤ T ３ and T ２ -T １ including the step of adjusting the slotted ring device to reduce the flow rate entering the first medium inlet until > T T ２ The control method according to claim 11, wherein is the temperature detected by the second temperature sensor, and T is the safe overheating degree at the compressor inlet.

13. The heat exchange system further comprises a compressor having a second medium inlet communicating with the medium outlet, and a condenser, wherein the compressor, the condenser, the throttling device, and the heat management member form a circulation circuit, and the heat exchange system further comprises a heating system arranged to heat the first heat exchange medium flowing out from the medium outlet, the heat management member and the compressor are in communication via a second pipeline, and the heating system further comprises a medium supply system and a first heat exchanger, wherein the medium supply system is for supplying the second heat exchange medium to the first heat exchanger, the first heat exchanger is connected to the second pipeline and arranged to realize heat exchange between the first heat exchange medium and the second heat exchange medium in the second pipeline, and further comprises a second temperature sensor arranged to detect the temperature of the first heat exchange medium at the second medium inlet. The control method described above is T ２ -T １ When T ≤ T, ２ -T １ The step includes adjusting the medium supply system to increase the flow rate of the second heat exchange medium supplied to the first heat exchanger until T is reached, T ２ The control method according to claim 11, wherein is the temperature detected by the second temperature sensor, and T is the safe overheating degree at the compressor inlet.

14. The media supply system comprises a media storage container for storing the second heat exchange medium and a drive unit, wherein the media storage container, the drive unit and the first heat exchanger form a circulation circuit. The control method described above is T ２ -T １ The control method according to claim 13, further comprising the step of increasing the output of the drive unit to increase the flow rate of the second heat exchange medium supplied to the first heat exchanger when ≤ T.

15. T ２ -T １ > In the case of T + ΔT, T < T ２ -T １ The step includes adjusting the medium supply system to reduce the flow rate of the second heat exchange medium supplied to the first heat exchanger until ≤ T + ΔT, The control method according to claim 13 or claim 14, wherein ΔT = 6°C.

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