Heat exchange system of equipment and control method thereof, and energy storage system

Abstract

The present application discloses a heat exchange system of a device and its control method and energy storage system, which belong to the field of thermal management technology. The device includes a first heat generating component and a second heat generating component, and the heat exchange system includes: a first phase change cold storage circuit, including a first heat exchange unit and a second heat exchange unit, the first heat exchange unit is thermally coupled with the first heat generating component; a second phase change cold storage circuit, including a third heat exchange unit thermally coupled with the second heat generating component; a compression circuit, configured to exchange heat with the second heat exchange unit; a first valve group, configured to control the first phase change cold storage circuit and the second phase change cold storage circuit to be connected, or to control the first phase change cold storage circuit and the second phase change cold storage circuit to be isolated from each other. The first phase change cold storage circuit and the second phase change cold storage circuit utilize the characteristics of phase change materials absorbing latent heat during the phase change process to dissipate heat for the heat generating components in the device, thereby reducing the heat dissipation cost.

Description

Technical Field

[0001] The present application belongs to the field of thermal management technology, and in particular, relates to a heat exchange system of a device, a control method thereof, and an energy storage system. Background Art

[0002] In the current energy storage technology field, liquid cooling technology has become the mainstream choice. Liquid cooling technology mainly relies on circulating coolant and uses its sensible heat storage characteristics to absorb and take away the large amount of heat generated during the operation of energy storage equipment. However, in the field of large-scale energy storage, energy storage equipment generates a lot of heat, and the use of liquid cooling technology to dissipate heat for energy storage equipment is inefficient and costly. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a heat exchange system for a device and a control method thereof, and an energy storage system, wherein the first phase change cold storage loop and the second phase change cold storage loop utilize the property of the phase change material to absorb latent heat during the phase change process to dissipate heat for the heat generating components in the device, thereby reducing the heat dissipation cost.

[0004] In a first aspect, the present application provides a heat exchange system for a device, the device comprising a first heat generating component and a second heat generating component, the heat exchange system comprising:

[0005] A first phase-change cold storage circuit includes a first heat exchange unit and a second heat exchange unit, wherein the first heat exchange unit is thermally coupled to the first heat generating component;

[0006] A second phase-change cold storage loop includes a third heat exchange unit thermally coupled to the second heat generating component;

[0007] a compression circuit configured to exchange heat with a second heat exchange unit;

[0008] The first valve group is configured to control the first phase change cold storage circuit and the second phase change cold storage circuit to be connected, or to control the first phase change cold storage circuit and the second phase change cold storage circuit to be isolated from each other.

[0009] According to one embodiment of the present application, the first phase-change cold storage circuit includes a first heat exchange unit, a first pump, a second heat exchange unit, and a first phase-change cold storage unit connected to form a circuit.

[0010] According to one embodiment of the present application, the first pump is connected between the first heat exchange unit and the second heat exchange unit, the first phase change cold storage unit is connected to the output side of the second heat exchange unit, the first valve group is connected between the first phase change cold storage unit and the first heat exchange unit, and the first valve group is used to directly connect the passage between the first phase change cold storage unit and the first heat exchange unit, or to connect the second phase change cold storage circuit between the first phase change cold storage unit and the first heat exchange unit.

[0011] According to one embodiment of the present application, the first phase change cold storage circuit includes:

[0012] A first bypass pipeline is connected in parallel with the first heat exchange unit;

[0013] and / or,

[0014] The second bypass pipeline is connected in parallel with the first phase change cold storage unit.

[0015] According to one embodiment of the present application, the first phase change cold storage circuit includes:

[0016] a second valve group, wherein a first valve port of the second valve group is communicated with a first port of the second heat exchange unit, and a second valve port of the second valve group is communicated with a first port of the first phase-change cold storage unit;

[0017] A mixing water tank, wherein the first port of the mixing water tank is connected to the second port of the first phase change cold storage unit, the second port of the mixing water tank is connected to the third valve port of the second valve group, and the third port of the mixing water tank is connected to the first valve group.

[0018] According to one embodiment of the present application, the second phase-change cold storage circuit includes a third heat exchange unit, a second pump, and a second phase-change cold storage unit connected to form a circuit.

[0019] According to one embodiment of the present application, the second pump is connected between the second phase change cold storage unit and the third heat exchange unit, the first valve group is connected between the second phase change cold storage unit and the third heat exchange unit, and the first valve group is used to control the on-off between the second phase change cold storage unit and the third heat exchange unit, or to control the on-off between the second phase change cold storage unit, the third heat exchange unit and the first phase change cold storage circuit respectively.

[0020] According to one embodiment of the present application, the second phase change cold storage circuit includes:

[0021] a third valve group, wherein a first valve port of the third valve group is connected to one end of the second pump, and a second valve port of the third valve group is connected to a first port of the second phase-change cold storage unit;

[0022] The third bypass pipeline has a first port connected to the third valve port of the third valve group, and a second port connected to the first valve group.

[0023] According to one embodiment of the present application, the phase change temperature of the phase change material in the first phase change cold storage loop is lower than the phase change temperature of the phase change material in the second phase change cold storage loop;

[0024] Alternatively, an electric heating unit is provided on the first phase-change cold storage circuit and / or the second phase-change cold storage circuit.

[0025] According to one embodiment of the present application, the compression circuit comprises:

[0026] a fourth valve group, wherein a first valve port of the fourth valve group is connected to the second heat exchange unit;

[0027] A gas-liquid separator, a compressor and an oil separator are sequentially connected, the inlet of the gas-liquid separator is connected to the second valve port of the fourth valve group, and the outlet of the oil separator is connected to the third valve port of the fourth valve group;

[0028] a fourth heat exchange unit, wherein a first port of the fourth heat exchange unit is in communication with a fourth valve port of the fourth valve group;

[0029] a fifth valve group, wherein a first valve port of the fifth valve group is communicated with a second port of the fourth heat exchange unit, and a second valve port of the fifth valve group is communicated with the second heat exchange unit;

[0030] The liquid reservoir, the filter and the throttling element are connected in sequence, the inlet of the liquid reservoir is connected to the third valve port of the fifth valve group, and the outlet of the throttling element is connected to the fourth valve port of the fifth valve group.

[0031] In a second aspect, the present application provides an energy storage system, which includes an energy storage device and the aforementioned heat exchange system, the energy storage device includes multiple energy storage cabinets and a liquid cooling unit, the energy storage cabinet includes an energy storage battery and an electronic device, the energy storage cabinet is provided with a first phase change cold storage circuit and a second phase change cold storage circuit, the liquid cooling unit is provided with a compression circuit, the energy storage battery is thermally coupled to the first phase change cold storage circuit, and the electronic device is thermally coupled to the second phase change cold storage circuit.

[0032] According to one embodiment of the present application, an energy storage cabinet includes a shell and a accommodating cavity formed by the shell, wherein a cold storage cavity, an electronic device compartment and an energy storage battery are sequentially arranged in the accommodating cavity from bottom to top, an electronic device is arranged in the electronic device compartment, the cold storage cavity is provided with a first phase change cold storage unit in a first phase change cold storage circuit, and the shell is provided with a second phase change cold storage unit in a second phase change cold storage circuit.

[0033] According to one embodiment of the present application, an opening is provided on a side of the electronic device cabin body facing the cold storage chamber, a heat dissipation tooth is formed on a side of the cold storage chamber facing the electronic device cabin, the heat dissipation tooth extends into the electronic device cabin through the opening, a fan unit is provided in the electronic device cabin, the fan unit is used to form a gas flow path in the electronic device cabin, and the heat dissipation tooth is located on the gas flow path; or,

[0034] A fan coil unit is arranged in the electronic device cabin, the inlet of the fan coil unit is connected with the main output pipeline of the cold storage chamber, the outlet of the fan coil unit is connected with the main input pipeline of the cold storage chamber, and the fan coil unit is located on the gas flow path.

[0035] According to one embodiment of the present application, the second phase-change cold storage unit is disposed at at least one of the side, top, back sheet metal, and door panel of the energy storage cabinet housing.

[0036] In a third aspect, the present application provides a control method, which is applied to the aforementioned heat exchange system, and the control method includes:

[0037] When the heat exchange system is in a cold charging mode, controlling the first phase change cold storage circuit and the second phase change cold storage circuit to be connected to form a first circulation circuit;

[0038] The compression circuit is controlled to transfer cold energy to the first circulation circuit through the second heat exchange unit.

[0039] According to one embodiment of the present application, the first heat exchange unit is connected in parallel with a first bypass pipeline, and the control method further includes:

[0040] When the heat exchange system is in a cold charging mode, the first bypass pipeline is controlled to be bypassed, and the flow path passing through the first heat exchange unit is disconnected;

[0041] and / or,

[0042] When the heat exchange system is in the cold charging mode and the ambient temperature is less than or equal to the temperature threshold, the third bypass pipeline is controlled to bypass and the flow path flowing through the second phase change cold storage unit is disconnected.

[0043] According to one embodiment of the present application, the control method further includes:

[0044] When the heat exchange system is in a heating mode, the first phase-change cold storage circuit and the second phase-change cold storage circuit are controlled to be connected to form a second circulation circuit, and the second bypass pipeline and the third bypass pipeline are both bypassed;

[0045] The compression circuit is controlled to transfer heat to the second circulation circuit through the second heat exchange unit, and the flow path flowing through the first phase change cold storage unit and the flow path flowing through the second phase change cold storage unit are disconnected.

[0046] According to one embodiment of the present application, the first phase-change cold storage unit in the first phase-change cold storage circuit is connected in parallel with a second bypass pipeline, the inlet of the first phase-change cold storage unit and the inlet of the second bypass pipeline are both connected to the second valve group, and the outlet of the first phase-change cold storage unit and the outlet of the second bypass pipeline are both connected to the mixing tank;

[0047] The control method also includes:

[0048] Get the coolant temperature at the output side of the mixing tank;

[0049] The flow ratio of the second valve group to the first phase change cold storage unit and the second bypass pipeline is adjusted according to the coolant temperature.

[0050] According to the heat exchange system, energy storage device and control method of the equipment of multiple embodiments of the present application, the first heat exchange unit realizes heat exchange with the first heat generating component to dissipate heat for the first heat generating component, the third heat exchange unit realizes heat exchange with the second heat generating component to dissipate heat for the second heat generating component, and the first phase change cold storage circuit and the second phase change cold storage circuit utilize the characteristic of phase change material absorbing latent heat during the phase change process to dissipate heat for the heat generating components in the equipment, thereby reducing the heat dissipation cost.

[0051] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0053] Figure 1 is a structural block diagram of a heat exchange system provided in an embodiment of the present application;

[0054] Figure 2 It is one of the structural schematic diagrams of the heat exchange system provided in the embodiment of the present application;

[0055] Figure 3 This is the second structural schematic diagram of the heat exchange system provided in the embodiment of the present application;

[0056] Figure 4 This is the third structural schematic diagram of the heat exchange system provided in the embodiment of the present application;

[0057] Figure 5 This is the fourth structural schematic diagram of the heat exchange system provided in the embodiment of the present application;

[0058] Figure 6 is a partial structural schematic diagram of a first phase change cold storage circuit provided in an embodiment of the present application;

[0059] Figure 7 is a schematic diagram of the structure of the energy storage device provided in the embodiment of the present application;

[0060] Figure 8 is a structural schematic diagram of an energy storage cabinet provided in an embodiment of the present application;

[0061] Fig. 9 This is one of the connection relationship diagrams of the electronic device cabin and the cold storage chamber provided in the embodiment of the present application;

[0062] Fig.10 This is one of the gas flow diagrams in the electronic device cabin provided in the embodiment of the present application;

[0063] Fig.11 This is the second diagram of the connection relationship between the electronic device cabin and the cold storage chamber provided in the embodiment of the present application;

[0064] Fig.12 This is the second gas flow diagram in the electronic device cabin provided by the embodiment of the present application;

[0065] Fig.13 This is the third diagram of the connection relationship between the electronic device cabin and the cold storage chamber provided in the embodiment of the present application;

[0066] Fig.14 This is the third gas flow diagram in the electronic device cabin provided by the embodiment of the present application;

[0067] Fig.15 Schematic diagram of the piping arrangement of the second phase change cold storage circuit provided in the embodiment of the present application;

[0068] Fig.16 It is one of the flow charts of the control method provided in the embodiment of the present application;

[0069] Fig.17 This is the second flowchart of the control method provided in the embodiment of the present application.

[0070] Reference numerals:

[0071] The first phase-change cold storage circuit 100, the first heat exchange unit 110, the second heat exchange unit 120, the first phase-change cold storage unit 130, the first bypass pipeline 140, the second bypass pipeline 150, the second valve group 160, the mixing tank 170, the temperature sensor 180, the second phase-change cold storage circuit 200, the third heat exchange unit 210, the third bypass pipeline 220, the second phase-change cold storage unit 230, the third valve group 240, the compression circuit 300, the fourth valve group 310, the gas-liquid separator 320, the compressor 330, the oil separator 340, the fourth heat exchange unit 350, the air Fan 351, fifth valve group 360, throttling element 370, filter 380, liquid reservoir 390, first valve group 400, first heating component 510, second heating component 520, first fan 521, second fan 522, third fan 523, fourth fan 524, fan coil 525, energy storage battery 526, electronic device compartment 527, electric heating unit 600, first pump 710, second pump 720, energy storage cabinet 800, cold storage chamber 810, heat dissipation teeth 820, first heat dissipation tooth portion 821, second heat dissipation tooth portion 822, liquid cooling unit 900. DETAILED DESCRIPTION

[0072] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0073] In the following description, "circuit" refers to a conductive loop composed of at least one element or subcircuit through electrical connection or electromagnetic connection. When an element or circuit is said to be "coupled to" or "connected to" another element or an element / circuit is said to be "coupled to" or "connected to" two nodes, it can be directly coupled or connected to another element or there can be an intermediate element, and the connection between the elements can be physical, logical, or a combination thereof. On the contrary, when an element is said to be "directly coupled to" or "directly connected to" another element, it means that there is no intermediate element between the two.

[0074] In the description, the terms "first", "second", etc. are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the numerical descriptors used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0075] In addition, descriptions with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0076] In the current energy storage technology field, liquid cooling technology has become the mainstream choice. Liquid cooling technology mainly relies on circulating coolant and uses its sensible heat storage characteristics to absorb and take away the large amount of heat generated during the operation of energy storage equipment. However, in the field of large-scale energy storage, energy storage equipment generates a lot of heat, and the efficiency of using liquid cooling technology to dissipate heat for energy storage equipment is low. In addition, it takes a lot of electricity to start the liquid cooling unit, which is costly.

[0077] Reference Figure 1 , Figure 1The structural block diagram of the heat exchange system of the device provided by the embodiment of the present application is shown. One embodiment of the present application proposes a heat exchange system of a device, the device includes a first heat generating component 510 and a second heat generating component 520, and the heat exchange system includes: a first phase change cold storage circuit 100, a second phase change cold storage circuit 200, a compression circuit 300 and a first valve group. The first phase change cold storage circuit 100 includes a first heat exchange unit 110 and a second heat exchange unit 120, and the first heat exchange unit 110 is thermally coupled with the first heat generating component 510; the second phase change cold storage circuit 200 includes a third heat exchange unit 210 thermally coupled with the second heat generating component 520; the compression circuit 300 is configured to exchange heat with the second heat exchange unit 120; the first valve group is configured to control the first phase change cold storage circuit 100 and the second phase change cold storage circuit 200 to be connected, or to control the first phase change cold storage circuit 100 and the second phase change cold storage circuit 200 to be isolated from each other.

[0078] The heat exchange system provided in the embodiment of the present application can be applied to a variety of equipment in the industrial field, including but not limited to energy storage equipment, chemical equipment or heating equipment. The first heating component 510 and the second heating component 520 refer to the components of the equipment that generate heat due to current flow, resistance loss, electromagnetic induction or other physical processes when the equipment is working. The specific type of the heating component is not limited here. For example, in an energy storage device, the heating component may include an inverter, a battery, and an energy storage converter.

[0079] The first phase change cold storage circuit 100 may include a first phase change cold storage unit 130, which is mainly used to store a first phase change material. The first phase change material can absorb latent heat when a phase change occurs within a specific temperature range, such as when it changes from a gaseous state to a liquid state, or when it changes from a liquid state to a solid state. The first phase change cold storage circuit 100 is a circuit that uses the latent heat released when the phase change material undergoes a phase change to dissipate heat for the first heating component 510.

[0080] There is a coolant circulating in the pipeline of the first phase-change cold storage circuit 100. The latent heat released during the phase change of the first phase-change material can make the coolant flowing through the first phase-change cold storage unit 130 at a lower temperature.

[0081] The first heat exchange unit 110 and the second heat exchange unit 120 are devices for realizing heat transfer between objects at different temperatures. The first heat exchange unit 110 is arranged in the first phase change cold storage circuit 100 and is in thermal contact with the first heating component 510. The coolant flowing through the first heat exchange unit 110 can realize heat exchange with the first heating component 510, thereby dissipating heat for the first heating component 510. The first heating component 510 can be a battery, and the first heat exchange unit 110 can be a cold plate, or other types of heat exchangers such as an immersion heat exchanger.

[0082] The second phase-change cold storage circuit 200 may include a second phase-change cold storage unit 230 . The second phase-change cold storage unit 230 is mainly used to store a second phase-change material. The principle of the second phase-change material may refer to the first phase-change material, which will not be described in detail here.

[0083] The third heat exchange unit 210 is in thermal contact with the second heating component 520, and the coolant flowing through the third heat exchange unit 210 can achieve heat exchange with the second heating component 520, thereby dissipating heat for the second heating component 520. The second heating component 520 can be an electronic device, and the third heat exchange unit 210 can be a cold plate, or other types of heat exchangers such as an immersion heat exchanger.

[0084] The first phase change material and the second phase change material can be selected according to the actual application scenario, and are not limited here. For example, the first phase change material and the second phase change material can be paraffin, acetic acid, molten salts, etc.

[0085] It should be noted that the number of the first phase change cold storage loop 100 and the second phase change cold storage loop 200 in the heat exchange system can be selected according to the actual application scenario and is not limited here. For example, the heat exchange system may include a first phase change cold storage loop 100 and a second phase change cold storage loop 200, or the heat exchange system may include two first phase change cold storage loops 100 and three second phase change cold storage loops 200.

[0086] When the heat exchange system includes multiple first phase-change cold storage circuits 100, each first phase-change cold storage circuit 100 can be connected in series or in parallel. When multiple first phase-change cold storage circuits 100 are connected in series, multiple first phase-change cold storage circuits 100 form a loop, on which multiple first heating components 510 and multiple first phase-change cold storage units 130 are connected in series in sequence. At this time, the cold can be circulated through each first phase-change cold storage circuit 100, and multiple first phase-change cold storage units 130 can be backed up for each other, thereby improving the reliability of the heat exchange system. When multiple first phase-change cold storage circuits 100 are connected in parallel, each first phase-change cold storage circuit 100 exchanges heat with the second heat exchange unit 120, and each first phase-change cold storage circuit 100 operates independently without interfering with each other. When multiple first phase-change cold storage circuits 100 are connected in series and in parallel, multiple first phase-change cold storage circuits 100 can be connected or isolated with the second phase-change cold storage circuit 200 through the first valve group 400.

[0087] Similarly, when the heat exchange system includes multiple second phase change cold storage circuits 200, the connection method thereof can refer to the case where the heat exchange system includes multiple first phase change cold storage circuits 100, which will not be repeated here.

[0088] The following description will be made by taking an example where the heat exchange system includes a first phase-change cold storage loop 100 and a second phase-change cold storage loop 200 .

[0089] The compression circuit 300 can have two working modes according to the different operation modes of its internal components. In the first working mode, when the second heat exchange unit 120 is used as an evaporator for the compression circuit 300 and as a condenser for the first phase change cold storage circuit 100, the compression circuit 300 provides cold capacity for the second heat exchange unit 120, and the first phase change cold storage circuit 100 can be charged with cold at this time; in the second working mode, when the second heat exchange unit 120 is used as a condenser for the compression circuit 300 and as an evaporator for the first phase change cold storage circuit 100, the compression circuit 300 can provide heat for the second heat exchange unit 120, and the first phase change cold storage circuit 100 can be heated at this time.

[0090] The specific type of the compression circuit 300 can be selected according to the actual application scenario and is not limited here. For example, the compression circuit 300 can include a liquid cooling module.

[0091] The first valve group 400 may be a five-way valve, or may be implemented by a combination of a two-way valve and a three-way valve, or may be implemented by a combination of multiple two-way valves. The first phase-change cold storage circuit 100 and the second phase-change cold storage circuit 200 may be connected or isolated from each other by controlling the opening and closing of each valve port in the first valve group 400. The following is an example of the first valve group 400 being a five-way valve.

[0092] When the first valve group 400 connects the first phase change cold storage circuit 100 and the second phase change cold storage circuit 200, the coolant circulates between the first phase change cold storage circuit 100 and the second phase change cold storage circuit 200 to achieve heat transfer; when the first valve group 400 disconnects the passage between the first phase change cold storage circuit 100 and the second phase change cold storage circuit 200, the two cold storage circuits form independent circulation circuits without interfering with each other, which is suitable for scenarios where the first heating component 510 and the second heating component 520 have different heat dissipation requirements.

[0093] According to the heat exchange system of the present application, the first heat exchange unit 110 realizes heat exchange with the first heat generating component 510 and thus realizes heat dissipation of the first heat generating component 510, and the third heat exchange unit 210 realizes heat exchange with the second heat generating component 520 and thus realizes heat dissipation of the second heat generating component 520; the first phase change cold storage circuit 100 and the second phase change cold storage circuit 200 utilize the characteristics of phase change materials absorbing sensible heat and latent heat during the phase change process to dissipate heat for the heat generating components in the equipment, thereby reducing the heat dissipation cost.

[0094] Reference Figures 2 to 5 , Figures 2 to 5In some embodiments, the first phase change cold storage circuit 100 includes a first heat exchange unit 110, a first pump 710, a second heat exchange unit 120 and a first phase change cold storage unit 130 connected in a loop.

[0095] The coolant circulates in the first heat exchange unit 110, the first pump 710, the second heat exchange unit 120 and the first phase change cold storage unit 130 connected in a loop. The first phase change material can be stored in the first phase change cold storage unit 130, and the latent heat absorbed by the first phase change material during the phase change process can reduce the temperature of the coolant in the first phase change cold storage loop 100. When the low-temperature coolant flows through the first heat exchange unit 110, the first heat exchange unit 110 can achieve heat exchange with the first heating component 510, thereby cooling the first heating component 510.

[0096] The second heat exchange unit 120 can achieve heat exchange with the compression circuit 300. When the compression circuit 300 provides cooling for the second heat exchange unit 120, the temperature of the coolant can be further reduced, thereby improving the heat exchange efficiency.

[0097] The first pump 710 may be a water pump and is mainly used to accelerate the flow rate of the coolant in the first phase-change cold storage loop 100 , thereby improving the heat exchange efficiency of the first phase-change cold storage loop 100 .

[0098] The present embodiment does not limit the specific connection sequence of the first heat exchange unit 110, the first pump 710, the second heat exchange unit 120 and the first phase change cold storage unit 130, and the specific connection sequence can be selected according to the actual application scenario.

[0099] In some embodiments, in order to reduce the loss of cold and further improve the cooling effect on the first heating component 510, the first pump 710 is connected between the first heat exchange unit 110 and the second heat exchange unit 120, the first phase change cold storage unit 130 is connected to the first port of the second heat exchange unit 120, and the first valve group 400 is connected between the first phase change cold storage unit 130 and the first heat exchange unit 110. The first valve group 400 is used to control the on-off between the first phase change cold storage unit 130 and the first heat exchange unit 110; or control the on-off between the first phase change cold storage unit 130 and the second phase change cold storage circuit 200, or control the on-off between the first heat exchange unit 110 and the second phase change cold storage circuit 200, or control the on-off between the first phase change cold storage unit 130, the first heat exchange unit 110 and the second phase change cold storage circuit 200.

[0100] The first pump 710 is connected between the first heat exchange unit 110 and the second heat exchange unit 120. After the coolant exchanges heat with the first heating component 510 through the first heat exchange unit 110, the temperature of the coolant increases. The first pump 710 can drive the coolant to enter the second heat exchange unit 120 and exchange heat with the compression circuit 300, thereby cooling the coolant.

[0101] Under some working conditions, after the second heat exchange unit 120 exchanges heat with the compression circuit 300, the temperature of the coolant may be too low. The first phase change cold storage unit 130 is connected to the first port of the second heat exchange unit 120. The first phase change cold storage material can appropriately heat the coolant output by the second heat exchange unit 120 to prevent the coolant with too low a temperature from entering the first heat exchange unit 110 and causing damage to the first heating component 510.

[0102] When the first valve group 400 is directly connected to the passage between the first phase change cold storage unit 130 and the first heat exchange unit 110, after the heat absorbed by the first phase change material cools the coolant, the coolant directly enters the first heat exchange unit 110 to dissipate heat for the first heating component 510, which can reduce the loss of cold and thus make the heat dissipation efficiency of the first heating component 510 higher.

[0103] When the first valve group 400 is connected to the second phase change cold storage circuit 200 between the first phase change cold storage unit 130 and the first heat exchange unit 110, after the heat absorbed by the first phase change material cools the coolant, the coolant can enter the second phase change cold storage circuit 200 and dissipate heat for the second heating component 520 through the third heat exchange unit 210, thereby improving the utilization rate of the latent heat released by the first phase change material.

[0104] In some embodiments, the first phase-change cold storage loop 100 includes a first bypass line 140 , and the first bypass line 140 is connected in parallel with the first heat exchange unit 110 .

[0105] The first bypass line 140 is connected in parallel with the first heat exchange unit 110. When the compression circuit 300 is used to charge the second heat exchange unit 120 with cold, the first bypass line 140 is connected. At this time, the pipeline of the first heat exchange unit 110 is disconnected, and the coolant passes through the second heat exchange unit 120, the first phase change cold storage unit 130, the first bypass line 140 and the first pump 710 in sequence. At this time, the low-temperature coolant can be prevented from entering the first heating component 510, thereby improving the cooling efficiency while protecting the battery.

[0106] In some embodiments, the first phase-change cold storage circuit 100 includes a second bypass line 150, and the second bypass line 150 is connected in parallel with the first phase-change cold storage unit 130. It should be emphasized that in order to adapt to different working conditions, one of the first bypass line 140 and the second bypass line 150, or both of them are present in the first phase-change cold storage circuit 100.

[0107] The cold released after the phase change of the first phase change material may make the temperature of the coolant much lower than the normal working temperature of the first heating component 510. The second bypass pipeline 150 is connected in parallel to the first phase change cold storage unit 130. When the normal working temperature of the first heating component 510 is higher than the temperature of the coolant after the phase change of the first phase change material, the second bypass pipeline 150 can be controlled to be conductive. The coolant passes through the second heat exchange unit 120, the second bypass pipeline 150, the first heat exchange unit 110 and the first pump 710 in sequence to dissipate heat for the first heating component 510, so as to prevent the coolant with too low a temperature from damaging the first heating component 510.

[0108] For example, refer to Figure 2-Figure 6 , Figure 6 The partial structure of the first phase-change cold storage circuit 100 of the present application is shown. In some embodiments, the first phase-change cold storage circuit 100 includes a second valve group 160 and a mixing water tank 170 connected in series. The first valve port b1 of the second valve group 160 is connected to the first port of the second heat exchange unit 120, and the second valve port b2 of the second valve group 160 is connected to the first port of the first phase-change cold storage unit 130; the first port of the mixing water tank 170 is connected to the second port of the first phase-change cold storage unit 130, and the second port of the mixing water tank 170 is connected to the third valve port b3 of the second valve group 160, and the third port of the mixing water tank 170 is connected to the first valve group 400.

[0109] When mixing water, a part of the coolant flows out from the first port of the second heat exchange unit 120 and passes through the first valve port b1 of the second valve group 160 and the third valve port b3 of the second valve group 160 and directly flows into the mixing water tank 170, and another part of the coolant flows out from the first port of the second heat exchange unit 120 and passes through the first valve port b1 of the second valve group 160 and the second valve port b2 of the second valve group 160 and flows into the first phase change cold storage unit 130, and flows out from the second port of the first phase change cold storage unit 130 and flows into the mixing water tank 170.

[0110] The cold released by the first phase change material after the phase change makes the temperature of the coolant much lower than the normal working temperature of the first heating component 510. The compression circuit 300 exchanges heat with the second heat exchange unit 120, which can make the temperature of the coolant in the second heat exchange unit 120 close to the ambient temperature, which is higher than the temperature of the coolant flowing out of the second port of the first phase change cold storage unit 130. Therefore, the low-temperature coolant output from the second port of the first phase change cold storage unit 130 and the high-temperature coolant output from the first port of the second heat exchange unit 120 are mixed in the mixing tank 170 and converted into medium-temperature coolant. The medium-temperature coolant flows into the first heat exchange unit 110 through the first valve group 400 and exchanges heat with the first heating component 510. The mixing tank 170 is provided to mix the coolant output from the first phase change cold storage unit 130 with the high-temperature coolant, so as to control the temperature of the coolant flowing into the first heat exchange unit 110, thereby protecting the life of the battery system coupled to the first heat exchange unit 110. The flow path of the coolant can refer to Figure 2 .

[0111] In the above embodiment of the present application, the use of the mixing tank 170 can improve the water mixing effect and make the temperature of the coolant flowing into the first heat exchange unit 110 more uniform. It should be emphasized that although the mixing tank 170 is called a mixing tank, various types of cooling media such as gas and liquid can be used in the present application, and these different types of cooling media can be mixed by the mixing tank 170.

[0112] It should be noted that the second valve group 160 can be a three-way valve or a plurality of gate valves connected in series or parallel. The number of valve bodies in the second valve group 160 and the number of valve ports on the valve bodies can be selected according to the actual application scenario.

[0113] As another example, the mixing tank 170 can be eliminated, and one end of the second bypass pipe 150 can be directly connected to the third valve port b3, and the other end of the second bypass pipe 150 can be directly connected to the first valve port a1 of the first valve group 400. The ratio between the cold and hot coolants can be adjusted by adjusting the opening of the third valve port b3, or by adjusting the openings of the third valve port b3 and the second valve port b2 at the same time. The cold and hot coolants are mixed in the pipes passing through the first valve port a1 of the first valve group 400 and the first valve port a2 of the first valve group 400, thereby achieving the temperature control of the coolant flowing into the first heat exchange unit 110.

[0114] In addition, by eliminating the mixing tank 170, one end of the second bypass pipe 150 can be directly connected to the third valve port b3, and the other end of the second bypass pipe 150 can be connected to the first valve port a1 of the first valve group 400. At the same time, a flow regulating valve can be installed in the second bypass pipe 150 to adjust the flow of the coolant flowing through the second bypass pipe 150. The cold and hot coolants are mixed in the pipes passing through the first valve port a1 of the first valve group 400 and the first valve port a2 of the first valve group 400, thereby controlling the temperature of the coolant flowing into the first heat exchange unit 110.

[0115] Compared with the embodiment using the mixing tank 170, the above two embodiments of the present application eliminate the mixing tank, and the requirements for installation space are lower.

[0116] The flow ratio of the second valve port b2 of the second valve group 160 and the third valve port b3 of the second valve group 160 is controllable. In some embodiments, the first phase change cold storage circuit 100 further includes a temperature sensor 180 and a controller (not shown in the figure). The temperature sensor 180 is disposed at the third port of the mixing tank 170, and is mainly used to measure the temperature of the coolant output by the mixing tank 170, and transmit the measurement result to the controller. When the temperature of the coolant output from the mixing tank 170 is lower than the normal working temperature of the first heating component 510, the controller can reduce the flow ratio of the second valve port b2 of the second valve group 160, reduce the coolant flowing through the first phase change cold storage unit 130, reduce the coolant flowing through the first phase change cold storage unit 130, and increase the temperature of the coolant output from the third port of the mixing water tank 170; when the temperature of the coolant output from the third port of the mixing water tank 170 is higher than the normal working temperature of the first heating component 510, the controller can increase the flow ratio of the second valve port b2 of the second valve group 160, increase the coolant flowing through the first phase change cold storage unit 130, and reduce the temperature of the coolant output from the third port of the mixing water tank 170.

[0117] In other embodiments, the temperature sensor 180 is disposed at the second port of the first heat exchange unit 110 to measure the temperature of the coolant flowing into the first heat exchange unit 110. The temperature of the coolant at the second port of the first heat exchange unit 110 is closer to the temperature of the heat exchange of the corresponding heating component, which can make the temperature control of the coolant more precise.

[0118] Continue to refer to Figures 2 to 5 In some embodiments, the second phase-change cold storage circuit 200 includes a third heat exchange unit 210, a second pump 720, and a second phase-change cold storage unit 230 connected to form a circuit.

[0119] The coolant circulates in the third heat exchange unit 210, the second pump 720, and the second phase change cold storage unit 230 connected to form a loop. The second phase change material can be stored in the second phase change cold storage unit 230, and the heat absorbed by the second phase change material during the phase change process can reduce the temperature of the coolant in the second phase change cold storage loop 200. The low-temperature coolant flows through the third heat exchange unit 210, and the second heating component 520 is thermally coupled with the third heat exchange unit 210, so that the coolant in the third heat exchange unit 210 can achieve heat exchange with the second heating component 520, thereby dissipating heat for the first heating component 510.

[0120] The second pump 720 may be a water pump and is mainly used to accelerate the flow rate of the coolant in the second phase-change cold storage loop 200 , thereby improving the heat exchange efficiency of the second phase-change cold storage loop 200 .

[0121] The present embodiment does not limit the specific connection sequence of the third heat exchange unit 210, the second pump 720 and the second phase change cold storage unit 230, and the specific connection sequence can be selected according to the actual application scenario.

[0122] In some embodiments, in order to reduce the loss of cold and further improve the cooling effect on the second heating component 520, the second pump 720 is connected between the second phase change cold storage unit 230 and the third heat exchange unit 210, and the first valve group 400 is connected between the second phase change cold storage unit 230 and the third heat exchange unit 210. The first valve group 400 is used to control the connection or disconnection of the passage between the second phase change cold storage unit 230 and the third heat exchange unit 210; or control the second phase change cold storage unit 230 to connect or disconnect the first phase change cold storage circuit 100, or control the third heat exchange unit 210 to connect or disconnect the first phase change cold storage circuit 100, or control the second phase change cold storage unit 230 and the third heat exchange unit 210 to connect or disconnect the connection with the first phase change cold storage circuit 100.

[0123] After the coolant in the third heat exchange unit 210 exchanges heat with the second heating component 520, the temperature of the coolant increases. The second pump 720 is connected between the second phase change cold storage unit 230 and the third heat exchange unit 210, which can accelerate the high-temperature coolant to enter the second phase change cold storage unit 230, so that the latent heat released by the second phase change material cools the high-temperature coolant.

[0124] When the first valve group 400 is directly connected to the direct passage between the second phase change cold storage unit 230 and the third heat exchange unit 210, after the heat absorbed by the second phase change material cools the coolant, the coolant directly enters the third heat exchange unit 210 to dissipate heat for the second heating component 520, which can reduce the loss of cold and thereby make the heat dissipation efficiency of the second heating component 520 higher.

[0125] When the first valve group 400 is connected to the first phase change cold storage circuit 100 between the second phase change cold storage unit 230 and the third heat exchange unit 210, after the heat absorbed by the second phase change material cools the coolant, the coolant can enter the first phase change cold storage circuit 100 and dissipate heat for the first heating component 510 through the first heat exchange unit 110, thereby improving the utilization rate of the latent heat released by the second phase change material.

[0126] In some embodiments, the second phase-change cold storage circuit 200 includes a third valve group 240 and a third bypass line 220. The first valve port c1 of the third valve group 240 is connected to the liquid outlet of the second pump 720, and the second valve port c2 of the third valve group 240 is connected to the first port of the second phase-change cold storage unit 230; the first port of the third bypass line 220 is connected to the third valve port c3 of the third valve group 240, and the second port of the third bypass line 220 is connected to the first valve group. In order to adapt to different working conditions, similar to the second valve group 160, the flow rate can also be regulated and the passage can be shut off or connected by controlling the opening of the three valve ports of the third valve group 240 or connecting a regulating valve on the third bypass line 220. For example, the three valve ports of the third valve group 240 can be connected, and the liquid output between the second valve port c2 and the third valve port c3 can be adjusted to charge the second phase-change cold storage unit 230 while cooling the third heat exchange unit 210.

[0127] It should be noted that the number of valve bodies in the third valve group 240 and the number of valve ports on the valve bodies can be selected according to actual application scenarios.

[0128] When the system is in the cold charging mode, the compression circuit 300 is usually used to charge the first phase change cold storage circuit 100 with cold. At this time, the compression circuit 300 extracts cold energy from the outside by means of compression refrigeration, and at the same time, the compression circuit 300 dissipates heat to the outside environment. The first phase change cold storage circuit 100 and the second phase change cold storage circuit 200 are connected. The low-temperature coolant first passes through the first phase change cold storage unit 130 for the first heat exchange. Then, the coolant enters the second phase change cold storage circuit 200 through the first valve group, and successively passes through the third heat exchange unit 210, the second pump 720, the first valve port c1 of the third valve group 240, and the second valve port c2 of the third valve group 240 to enter the second phase change cold storage unit 230, and performs a second heat exchange with the second phase change cold storage unit 230 to charge the second phase change cold storage unit 230 with cold. The flow path of the coolant can be referred to. Figure 3 At this time, the third bypass pipeline 220 is disconnected, the first bypass pipeline 140 is connected, and the second bypass pipeline 150 is disconnected. Of course, in the cold charging mode, if the first heat exchange unit 110 and the third heat exchange unit 210 also have heat dissipation requirements, the corresponding bypass pipelines can be connected, and the embodiment of the present invention will not be limited here.

[0129] In other embodiments, the ambient temperature is low, and the second phase change cold storage unit 230 can be set to self-cooling, and there is no need to charge the second phase change cold storage unit 230 with cold. At this time, only the first phase change cold storage unit 130 needs to be charged with cold, which can greatly improve the charging speed; after the low-temperature coolant flows out of the first phase change cold storage unit 130, it enters the second phase change cold storage circuit 200 through the first valve group, and passes through the third heat exchange unit 210, the second pump 720, the first valve port c1 of the third valve group 240, the third valve port c3 of the third valve group 240 and the first port of the third bypass line 220 in sequence to enter the third bypass line 220, and enters the first phase change cold storage circuit 100 through the second port of the third bypass line 220 and the first valve group. The flow path of the coolant can refer to Figure 4 The third bypass line 220 can reduce the use of the cold output by the second heat exchange unit 120 when the ambient temperature is low, thereby reducing the cold charging cost.

[0130] In some embodiments, the first valve group 400 has a plurality of valve ports, at least two of which are connected to the first phase-change cold storage circuit 100 , and at least two of which are connected to the second phase-change cold storage circuit 200 .

[0131] The valve port can be used to connect or disconnect the passage between the first phase change cold storage unit 130 and the first heat exchange unit 110, and can also be used to connect or disconnect the passage between the first phase change cold storage circuit 100 and the second phase change cold storage circuit 200. The following is an example in which the first valve group 400 includes five valve ports.

[0132] As an example, the first valve port a1 of the first valve group 400 is connected to the third port of the mixing water tank 170, the second valve port a2 of the first valve group 400 is connected to the input side of the first heat exchange unit 110, the third valve port a3 of the first valve group 400 is connected to the first port of the first bypass pipeline 140, the fourth valve port a4 of the first valve group 400 is connected to the input side of the third heat exchange unit 210, and the fifth valve port a5 of the first valve group 400 is connected to the second port of the first phase change cold storage unit 130.

[0133] When the first valve port a1 of the first valve group 400 is connected to the second valve port a2 of the first valve group 400, and the fourth valve port a4 of the first valve group 400 is connected to the fifth valve port a5 of the first valve group 400, the first phase-change cold storage circuit 100 is isolated from the second phase-change cold storage circuit 200. In the first phase-change cold storage circuit 100, the coolant passes through the second heat exchange unit 120, the first phase-change cold storage unit 130, the first valve port a1 of the first valve group 400, the second valve port a2 of the first valve group 400, the first heat exchange unit 110 and the first pump 710 in sequence, and the cooling energy generated by the heat exchange between the second heat exchange unit 120 and the compression circuit 300 and the latent heat released by the first phase-change material are heat exchanged with the battery in the first heat exchange unit 110 to dissipate heat for the battery. In the second phase change cold storage circuit 200, the latent heat released by the second phase change material reduces the temperature of the coolant and then flows out. The coolant passes through the third heat exchange unit 210 and the second pump 720 in sequence and then flows back to the second phase change cold storage unit 230, so that the latent heat released by the second phase change material can be used to dissipate heat for electronic devices.

[0134] When the first valve port a1 of the first valve group 400 is connected to the third valve port a3 of the first valve group 400, in the first phase change cold storage circuit 100, the coolant passes through the second heat exchange unit 120, the first phase change cold storage unit 130, the first valve port a1 of the first valve group 400, the third valve port a3 of the first valve group 400, the first bypass line 140 and the first pump 710 in sequence, and the first heat exchange unit 110 can be bypassed during the cold charging process to improve the cold charging efficiency.

[0135] When the first valve port a1 of the first valve group 400 is connected to the fifth valve port a5 of the first valve group 400, and the fourth valve port a4 of the first valve group 400 is connected to the third valve port a3 of the first valve group 400, the first phase change cold storage circuit 100 and the second phase change cold storage circuit 200 are connected, and the coolant passes through the second heat exchange unit 120, the first phase change cold storage unit 130, the first valve port a1 of the first valve group 400, the fifth valve port a5 of the first valve group 400, the third heat exchange unit 210, the second pump 720, the second phase change cold storage unit 230, the first bypass pipeline 140 and the first pump 710 in sequence, and can charge the first phase change cold storage unit 130 and the second phase change cold storage unit 230 with cold in sequence, thereby improving the charging efficiency.

[0136] When the first valve port a1 of the first valve group 400 is connected to the fifth valve port a5 of the first valve group 400, and the fourth valve port a4 of the first valve group 400 is connected to the second valve port a2 of the first valve group 400, the coolant passes through the second heat exchange unit 120, the first phase change cold storage unit 130, the first valve port a1 of the first valve group 400, the fifth valve port a5 of the first valve group 400, the third heat exchange unit 210, the second pump 720, the second phase change cold storage unit 230, the fourth valve port a4 of the first valve group 400, the second valve port a2 of the first valve group 400, the first heat exchange unit 110 and the first pump 710 in sequence. In a low temperature environment, the compression circuit 300 can operate in a heat pump mode to heat the second heat exchange unit 120, and the heat generated by the compression circuit 300 is used to heat the battery. The flow path of the coolant can refer to Figure 5 The second heating component 520 may also be used to work in a reactive mode to provide heating power for the battery.

[0137] In some embodiments, the phase change temperature of the phase change material in the first phase change cool storage loop 100 is lower than the phase change temperature of the phase change material in the second phase change cool storage loop 200 .

[0138] Different heating components generate different amounts of heat and have different sensitivities to temperature; therefore, the phase change temperatures of the phase change materials in the phase change cold storage subsystems corresponding to different heating components are also different.

[0139] In some embodiments, when the first heating component 510 is a battery and the second heating component 520 is an electronic device such as PCS, inverter, rectifier, DC-DC, DC-AC, the phase change temperature of the first phase change material in the first phase change cold storage circuit 100 where the battery is located is lower than the phase change temperature of the second phase change material in the second phase change cold storage circuit 200 because the battery generates more heat and is more sensitive to temperature than electronic devices.

[0140] Normally, in order to better dissipate heat from the battery, the battery will be placed in the first phase change cold storage circuit 100, and the first phase change cold storage circuit 100 will directly exchange heat with the compression circuit 300, that is, the compression circuit 300 is connected to the second heat exchange unit 120, which can further improve the heat dissipation effect.

[0141] Of course, if the battery is disposed in the second phase-change cold storage loop 200 , the phase change temperature of the phase change material in the first phase-change cold storage loop 100 is greater than the phase change temperature of the phase change material in the second phase-change cold storage loop 200 .

[0142] Setting up a phase change cold storage subsystem containing different phase change materials can meet the heat dissipation requirements of heat-generating components with different heat outputs, thereby achieving a better heat dissipation effect.

[0143] Continue to refer to Figures 2 to 5In some embodiments, an electric heating unit 600 is provided on the first phase-change cold storage loop 100 and / or the second phase-change cold storage loop 200 .

[0144] The electric heating unit 600 can convert electrical energy into thermal energy. When the electric heating unit 600 is arranged in the first phase-change cold storage circuit 100, it can provide heat to the battery when the ambient temperature is too low, so that the battery temperature remains within the optimal operating temperature range; when the electric heating unit 600 is arranged in the second phase-change cold storage circuit 200, it can provide heat to the electronic device when the ambient temperature is too low, so that the electronic device temperature remains within the optimal operating temperature range. The electric heating unit 600 is arranged on both the first phase-change cold storage circuit 100 and the second phase-change cold storage circuit 200, so that the battery and the electronic device can be heated at the same time, so that the temperature of each heating component in the device remains within the optimal operating temperature range, thereby maintaining the normal operation of each heating component and extending the service life of the heating component.

[0145] It should be noted that the present embodiment does not limit the specific location of the electric heating unit 600, and can be selected according to the actual application scenario. For example, in the first phase-change cold storage loop 100, the electric heating unit 600 can be arranged between the first heat exchange unit 110 and the first pump 710, and in the second phase-change cold storage loop 200, the electric heating unit 600 can be arranged between the third heat exchange unit 210 and the second pump 720.

[0146] Continue to refer to Figures 2 to 5 In some embodiments, the compression circuit 300 includes: a fourth valve group 310, a fourth heat exchange unit 350, a fifth valve group 360, a gas-liquid separator 320, a compressor 330 and an oil separator 340 connected in sequence, and a liquid reservoir 390, a filter 380 and a throttling element 370 connected in sequence. The first valve port d1 of the fourth valve group 310 is connected to the second heat exchange unit 120; the inlet of the gas-liquid separator 320 is connected to the second valve port d2 of the fourth valve group 310, and the outlet of the oil separator 340 is connected to the third valve port d3 of the fourth valve group 310; the first port of the fourth heat exchange unit 350 is connected to the fourth valve port d4 of the fourth valve group 310; the first valve port e1 of the fifth valve group 360 is connected to the second port of the fourth heat exchange unit 350, and the second valve port e2 of the fifth valve group 360 is connected to the second heat exchange unit 120; the inlet of the liquid reservoir 390 is connected to the third valve port e3 of the fifth valve group 360, and the outlet of the throttling element 370 is connected to the fourth valve port e4 of the fifth valve group 360.

[0147] It should be noted that the fourth valve group 310 and the fifth valve group 360 can both be four-way valves or multiple gate valves connected in series and parallel. The number of valve bodies in the fourth valve group 310 and the fifth valve group 360 and the number of valve ports on the valve bodies can be selected according to the actual application scenario.

[0148] The compression circuit 300 may be a liquid cooling module. The liquid cooling module is mainly used to perform heat exchange with the second heat exchange unit 120 and can charge cold or heat the second heat exchange unit 120.

[0149] The structure and function of the filter 380 and the liquid reservoir 390 have been described in relatively mature related technologies and will not be described in detail here.

[0150] When the second heat exchange unit 120 is used as an evaporator for the compression circuit 300 and as a condenser for the first phase change cold storage circuit 100, the compression circuit 300 provides cooling for the second heat exchange unit 120. The first valve port d1 of the fourth valve group 310 is connected to the second valve port d2 of the fourth valve group 310, the third valve port d3 of the fourth valve group 310 is connected to the fourth valve port d4 of the fourth valve group 310, the first valve port e1 of the fifth valve group 360 is connected to the fourth valve port e4 of the fifth valve group 360, and the second valve port e2 of the fifth valve group 360 is connected to the third valve port e3 of the fifth valve group 360. The coolant output by the second heat exchange unit 120 passes through the gas-liquid separator 320, the compressor 330, the oil separator 340, the fourth heat exchange unit 350, the liquid storage tank 390, the filter 380 and the throttling element 370 in sequence. The gas-liquid separator 320 is mainly used to reduce the risk of liquid hammer caused by the coolant that is not completely evaporated in the second heat exchange unit 120 to the compressor 330. The compressor 330 compresses the coolant into a high-temperature and high-pressure state. The oil separator 340 is mainly used to separate the lubricating oil in the high-pressure steam discharged from the compressor 330, reduce the lubricating oil from entering the heat exchange unit with the coolant, and reduce thermal resistance. At this time, the fourth heat exchange unit 350 is used as a condenser to convert the coolant in the high-temperature and high-pressure state into a high-pressure and normal-temperature state. The throttling element 370 is mainly used to convert the coolant in the high-pressure and normal-temperature state into a low-temperature and low-pressure state. The coolant in the low-temperature and low-pressure state evaporates and absorbs heat in the second heat exchange unit 120, so that the temperature of the coolant entering the first phase change cold storage circuit 100 is reduced, so as to charge the second heat exchange unit 120 with cold. The flow path of the coolant can refer to Figure 3 and Figure 4 .

[0151] The second heat exchange unit 120 is used as a condenser for the compression circuit 300 and as an evaporator for the first phase change cold storage circuit 100, and the compression circuit 300 transfers heat to the second heat exchange unit 120. The first valve port d1 of the fourth valve group 310 is connected to the third valve port d3 of the fourth valve group 310, the second valve port d2 of the fourth valve group 310 is connected to the fourth valve port d4 of the fourth valve group 310, the first valve port e1 of the fifth valve group 360 is connected to the fourth valve port e4 of the fifth valve group 360, and the second valve port e2 of the fifth valve group 360 is connected to the third valve port e3 of the fifth valve group 360. The coolant output by the second heat exchange unit 120 passes through the liquid reservoir 390, the filter 380, the throttling element 370, the fourth heat exchange unit 350, the gas-liquid separator 320, the compressor 330 and the oil separator 340 in sequence. The high-temperature and high-pressure coolant output by the compressor 330 is converted into a high-pressure and normal-temperature state after releasing heat in the second heat exchange unit 120. The heat released by the coolant increases the temperature of the second heat exchange unit 120, thereby heating the coolant in the first phase-change cold storage circuit 100. The flow path of the coolant can be referred to Figure 5 .

[0152] In other embodiments, the compression circuit 300 further includes a fan 351, which is disposed corresponding to the fourth heat exchange unit 350 and is mainly used to evenly distribute the cold or heat generated by the fourth heat exchange unit 350 to the surrounding space to increase the efficiency of heat exchange.

[0153] It should be noted that the liquid cooling module consumes a large amount of electrical energy during operation. Therefore, the liquid cooling module can be used to charge the first phase change cold storage circuit 100 and the second phase change cold storage sub-circuit during the night-time electricity price valley period, and the peak-valley electricity price difference can be used to recover the additional cost of the cold storage technology and reduce cooling costs.

[0154] Reference Figure 7 , Figure 7 The structure of the energy storage system provided by an embodiment of the present application is shown. An embodiment of the present application proposes an energy storage system, which includes an energy storage device and the aforementioned heat exchange system, the energy storage device includes a plurality of energy storage cabinets 800 and a liquid cooling unit 900, the energy storage cabinet 800 includes an energy storage battery 526 and an electronic device, the energy storage cabinet 800 is provided with a first phase change cold storage circuit 100 and a second phase change cold storage circuit 200, the liquid cooling unit 900 is provided with a compression circuit 300, the energy storage battery 526 is thermally coupled with the first phase change cold storage circuit 100, and the electronic device is thermally coupled with the second phase change cold storage circuit 200.

[0155] The energy storage device includes an energy storage battery 526 and an electronic device. The energy storage battery 526 and the electronic device will generate heat during operation. Therefore, the energy storage battery 526 can be the aforementioned first heating component 510, and the electronic device can be the aforementioned second heating component 520. The structure and principle of the heat exchange system can refer to the aforementioned embodiment and will not be repeated here. The first phase change cold storage loop 100 uses the characteristic of the phase change material absorbing latent heat during the phase change process to reduce the temperature of the coolant flowing through the first heat exchange unit 110. The first heat exchange unit 110 is used to perform heat exchange with the energy storage battery 526 to achieve heat dissipation for the energy storage battery 526; the second phase change cold storage loop 200 uses the characteristic of the phase change material absorbing latent heat during the phase change process to reduce the temperature of the coolant flowing through the third heat exchange unit 210. The third heat exchange unit 210 is used to perform heat exchange with the electronic device to achieve heat dissipation for the electronic device.

[0156] The liquid cooling unit 900 is provided with a compression circuit 300. The structure and function of the compression circuit 300 may refer to the aforementioned embodiment and will not be described in detail here.

[0157] The liquid cooling unit 900 and the first phase change cold storage circuit 100 in the energy storage cabinet 800 can be connected through a pipeline. The liquid cooling unit 900 is arranged outside the energy storage cabinet 800, so that the energy storage cabinet 800 can be connected in a four-sided manner when connecting cabinets, and the distance between cabinets can only consider the maintenance distance, which greatly increases the energy density of the energy storage power station.

[0158] According to the energy storage system of the present application, the first heat exchange unit 110 realizes heat exchange with the first heat generating component 510 to dissipate heat for the first heat generating component 510, the third heat exchange unit 210 realizes heat exchange with the second heat generating component 520 to dissipate heat for the second heat generating component 520, and the first phase change cold storage circuit 100 and the second phase change cold storage circuit 200 utilize the characteristic of phase change material absorbing latent heat during the phase change process to dissipate heat for the heat generating components in the equipment, thereby reducing the heat dissipation cost.

[0159] Reference Figure 7 , Figure 7 The structure of the energy storage cabinet 800 provided in an embodiment of the present application is shown. In some embodiments, the energy storage cabinet 800 includes a shell and a receiving cavity formed by the shell, and the receiving cavity is provided with a cold storage cavity 810, an electronic device compartment 527 and an energy storage battery 526 from bottom to top. The electronic device compartment 527 is provided with electronic devices, and an explosion-proof reserved space is formed between the energy storage battery 526 and the top of the shell. The cold storage cavity 810 is provided with a first phase-change cold storage unit 130 in the first phase-change cold storage circuit 100, and the shell is provided with a second phase-change cold storage unit 230 in the second phase-change cold storage circuit 200.

[0160] The shell is made of high-strength material, which can not only effectively protect the internal components from the external environment, but also has good heat insulation and explosion-proof performance. The specific material of the shell can be selected according to the actual application scenario and is not limited here. For example, the shell can be formed of aluminum alloy, stainless steel or fiberglass.

[0161] The first phase change cold storage unit 130 in the first phase change cold storage circuit 100 is arranged in the cold storage cavity 810 at the bottom of the accommodating cavity. The internal temperature of the energy storage cabinet 800 can be effectively adjusted by utilizing the characteristic of releasing latent heat of the phase change material, so as to achieve a suitable temperature environment required for the normal operation of the equipment even in extreme environments.

[0162] The energy storage battery 526 is arranged in the middle and upper part of the accommodating cavity to maximize the use of space and optimize the heat dissipation conditions. A certain space is reserved between the energy storage battery 526 and the top of the shell as a reserved explosion venting space. The energy storage battery 526 may have the risk of thermal runaway or explosion under extreme working conditions. The reserved explosion venting space can quickly release the pressure and effectively prevent the explosion wave from further damaging the energy storage cabinet 800 and the surrounding environment, greatly improving the safety of the energy storage system.

[0163] The shell itself integrates the second phase change cold storage unit 230 in the second phase change cold storage circuit 200. The second phase change cold storage unit 230 can be arranged in the interlayer of the shell or in the curved space of the corrugated plate. It can not only save space in the energy storage cabinet 800, but also the phase change material generally has a low thermal conductivity, which can play a certain role in heat preservation for the environment inside the cabinet.

[0164] Reference Figures 9 to 14 In some embodiments, an opening is provided on the side of the electronic device cabin 527 facing the cold storage chamber 810, and a heat dissipation tooth 820 is formed on the side of the cold storage chamber 810 facing the electronic device cabin 527, and the heat dissipation tooth 820 extends into the electronic device cabin 527 through the opening, and a fan unit is provided in the electronic device cabin 527, and the fan unit is used to form a gas flow path in the electronic device cabin 527, and the heat dissipation tooth 820 is located on the gas flow path; or, a fan coil unit 525 is provided in the electronic device cabin 527, and the inlet of the fan coil unit 525 is connected to the main output pipeline of the cold storage chamber 810, and the outlet of the fan coil unit 525 is connected to the main input pipeline of the cold storage chamber 810, and the fan coil unit 525 is located on the gas flow path.

[0165] The heat dissipation teeth 820 formed on the side of the cold storage chamber 810 facing the electronic device compartment 527 not only increase the surface area of ​​heat exchange, but also extend into the interior of the electronic device compartment 527 through the opening, forming an efficient heat conduction bridge. During the heat absorption or heat release process of the phase change material in the cold storage chamber 810, the heat dissipation teeth 820 can quickly transfer heat or cold to the heat exchange unit in the electronic device compartment 527, thereby effectively adjusting the temperature in the compartment.

[0166] Reference Fig. 9 and Fig.10 In some embodiments, the heat dissipation tooth 820 includes a first heat dissipation tooth portion 821 and a second heat dissipation tooth portion 822 located on opposite sides of the electronic device compartment 527 , and the fan group includes a plurality of fans, each of which is arranged around the side of the electronic device compartment 527 .

[0167] The first heat dissipation tooth portion 821 and the second heat dissipation tooth portion 822 on opposite sides of the electronic device compartment 527 not only increase the heat dissipation area, but also improve the efficiency and uniformity of the entire heat dissipation system by dispersing heat.

[0168] The number of fans in the fan group can be selected according to the actual application scenario and is not limited here.

[0169] As an example, the fan group includes four fans. The first fan 521 is arranged along the rack extension direction of the first heat dissipation tooth portion 821 toward the heat dissipation tooth 820, the second fan 522 is arranged on the first side in the electronic device compartment 527, and faces the second heat dissipation tooth portion 822; the third fan 523 is arranged along the rack extension direction of the second heat dissipation tooth portion 822 toward the heat dissipation tooth 820, and the third fan 523 is opposite to the first fan 521, and the fourth fan 524 is arranged on the second side in the electronic device compartment 527, and faces the first heat dissipation tooth portion 821, and the second side is opposite to the first side. The air outlet direction of the fan can fully cover every corner of the heat dissipation tooth 820, ensuring unobstructed and efficient circulation of the gas flow path.

[0170] Reference Fig.11 and Fig.12 In some embodiments, the heat dissipation tooth 820 is located in the middle of the electronic device compartment 527, and the rack of the heat dissipation tooth 820 is extended along the length direction of the electronic device compartment 527 (that is, the X direction in the figure). The fan group includes multiple fans, at least one fan is arranged toward the heat dissipation tooth 820 along the extension direction of the rack of the heat dissipation tooth 820, and multiple fans are arranged around the side of the electronic device compartment 527.

[0171] The rack design of the heat dissipation teeth 820 extends along the length of the electronic device compartment 527, which not only increases the heat dissipation area, but also achieves uniform distribution and effective conduction of heat. The channels formed between the racks provide a smooth path for the circulation of cold air, which helps to improve the overall heat dissipation efficiency.

[0172] The first fan 521 is arranged along the extending direction of the rack of the heat dissipation teeth 820 and is arranged toward the heat dissipation teeth 820. This directional arrangement allows the air outlet of the fan to directly act on the heat dissipation teeth 820, accelerates the flow of hot air between the racks, and improves the heat exchange efficiency.

[0173] The second fan 522 and the third fan 523 are respectively arranged at two opposite sides of the electronic device compartment 527, and the air outlet direction is opposite to the air outlet direction of the first fan 521, forming an all-round air flow network. Not only does it realize air circulation in every corner of the compartment, but also through the formed air flow circulation, the heat is quickly taken away from the central area and discharged to the outside, so that the entire heat dissipation system can operate efficiently and stably, providing reliable thermal protection for the electronic devices in the electronic device compartment 527.

[0174] It should be noted that the number and arrangement of the heat dissipation teeth 820 and the fans can be selected according to the actual application scenario and are not limited here.

[0175] Reference Fig.13 and Fig.14 The inlet of the fan coil 525 is connected to the main output pipeline of the cold storage chamber 810 so that the low-temperature cold stored in the cold storage chamber 810 can smoothly flow into the fan coil 525. In the fan coil 525, the low-temperature cold exchanges heat with the high-temperature air in the cabin, absorbs and takes away the heat in the air, thereby achieving a rapid reduction in the cabin temperature.

[0176] After the heat exchange, the temperature of the coolant will rise accordingly, and the coolant will flow out through the outlet of the fan coil 525 and re-enter the main input pipeline of the cold storage chamber 810. This cycle process not only realizes the transfer of heat, but also allows the coolant in the cold storage chamber 810 to be recycled, reducing energy waste.

[0177] Reference Fig.15 In some embodiments, the second phase-change cold storage unit 230 is disposed on at least one of the side, top, back sheet metal, and door panel of the energy storage cabinet 800 shell.

[0178] The second phase-change cold storage unit 230 is arranged on a sheet metal part on the side of the energy storage cabinet 800 shell, which not only saves space, but also promotes natural convection and radiation heat dissipation of heat by increasing the contact area with the surrounding environment, thereby improving the cold storage efficiency.

[0179] The second phase-change cold storage unit 230 is arranged on the sheet metal at the top of the energy storage cabinet 800 shell, so that the cold energy can directly cool the upper space in the cabin, effectively reducing the hot air stratification phenomenon and improving the overall heat dissipation uniformity.

[0180] The second phase-change cold storage unit 230 is embedded in the door panel, which can remove part of the heat by natural convection when the door is opened, and form a closed space when the door is closed to maintain the cooling capacity in the cabin, further improving the thermal management capability of the energy storage cabinet 800.

[0181] The second phase-change cold storage sub-circuit can be simultaneously arranged in multiple places on the side, top, back sheet metal and door panel of the energy storage cabinet 800 shell to increase the contact area with the internal space of the energy storage cabinet 800 and improve the cold storage efficiency.

[0182] Reference Fig.16 , Fig.16 The control method provided by the embodiment of the present application is shown. The embodiment of the present application provides a control method, which is applied to the aforementioned heat exchange system, and the control method includes step 10 and step 20.

[0183] Step 10: When the heat exchange system is in the cold charging mode, the first phase change cold storage loop 100 and the second phase change cold storage loop 200 are controlled to be connected to form a first circulation loop;

[0184] Step 20: Control the compression circuit to transfer cold energy to the first circulation circuit through the second heat exchange unit 120.

[0185] The heat exchange system also includes a controller, which is connected to the compression circuit 300 and the valve body. The executor of the control method proposed in the embodiment of the present application may be the controller or a functional module or functional entity in the controller that can implement the control method. The control method provided in the embodiment of the present application is described below using the controller as an example of the executor.

[0186] When the heat exchange system is in the charging and cooling mode, specifically, Figure 3 As shown, when the coolant circulates in the compression circuit 300, it will flow through the second heat exchange unit 120, the first valve port d1 of the fourth valve group 310, the second valve port d2 of the fourth valve group 310, the gas-liquid separator 320, the compressor 330, the oil separator 340, the fourth valve port d4 of the fourth valve group 310, the third valve port d3 of the fourth valve group 310, the fourth heat exchange unit 350, the first valve port e1 of the fifth valve group 360, the fourth valve port e4 of the fifth valve group 360, the liquid reservoir 390, the filter 380 and the throttling element 370, the third valve port e3 of the fifth valve group 360, and the second valve port e2 of the fifth valve group 360 to form a refrigeration circuit.

[0187] like Figure 3As shown, the third bypass pipeline 220 is disconnected, the first bypass pipeline 140 is connected, and the second bypass pipeline 150 is disconnected. The low-temperature coolant after heat exchange in the second heat exchange unit 120 flows through the first valve port b1 of the second valve group 160 and the second valve port b2 of the second valve group 160, the first phase change cold storage unit 130, the mixing water tank 170, the first valve port a1 of the first valve group 400, the fourth valve port a4 of the first valve group 400, the third heat exchange unit 210, and the second pump 70 in sequence. 20, the first valve port c1 of the third valve group 240, the second valve port c2 of the third valve group 240, the second phase-change cold storage unit 230, the fifth valve port a5 of the first valve group 400, the third valve port a3 of the first valve group 400, the first bypass pipeline 140, the electric heating unit 600, the first pump 710, and then return to the second heat exchange unit 120 to form a complete first circulation loop, realizing the joint cold charging of the first phase-change cold storage loop 100 and the second phase-change cold storage loop 200. Of course, in the cold charging mode, if the first heat exchange unit 110 and the third heat exchange unit 210 also have heat dissipation requirements, the corresponding bypass pipelines can be connected, and the embodiment of the present invention will not be limited to it here.

[0188] In actual applications, the controller can connect the valve port in the control valve body so that the first phase change cold storage circuit 100 and the second phase change cold storage circuit 200 are connected to form a first circulation circuit, and the compression circuit 300 transports cold to the second heat exchange unit 120, so that the temperature of the coolant in the second heat exchange unit 120 is reduced, and the low-temperature coolant passes through the first phase change cold storage circuit 100 and the second phase change cold storage circuit 200 in turn to charge the first phase change cold storage unit 130 and the second phase change cold storage unit 230 with cold, thereby providing temperature conditions for the phase change materials in the first phase change cold storage unit 130 and the second phase change cold storage unit 230 to undergo phase change.

[0189] According to the control method of the present application, the first heat exchange unit 110 realizes heat exchange with the first heat generating component 510 to dissipate heat for the first heat generating component 510, the third heat exchange unit 210 realizes heat exchange with the second heat generating component 520 to dissipate heat for the second heat generating component 520, and the first phase change cold storage circuit 100 and the second phase change cold storage circuit 200 utilize the characteristic of phase change material absorbing latent heat during the phase change process to dissipate heat for the heat generating components in the equipment, thereby reducing the heat dissipation cost.

[0190] In some embodiments, the first heat exchange unit 110 is connected in parallel with a first bypass line 140 , and the control method further includes: when the heat exchange system is in a cold charging mode, controlling the first bypass line 140 to bypass and disconnecting the flow path passing through the first heat exchange unit 110 .

[0191] The first heat exchange unit 110 is thermally coupled with the first heating component 510, that is, the first heat exchange unit 110 and the first heating component 510 exchange heat, and the heat generated by the first heating component 510 during operation can increase the temperature of the first heat exchange unit 110. When the heat exchange system is in the cold charging mode, the first bypass pipeline 140 bypasses the first heat exchange unit 110, so that the cold bypasses the first heat exchange unit 110, reduces the influence of the heat generated by the first heating component 510 on the cold charging process, and improves the cold charging efficiency.

[0192] In some embodiments, the second phase change cold storage unit 230 in the second phase change cold storage circuit 200 is connected in parallel with a third bypass line 220, and the control method also includes: when the heat exchange system is in a cold charging mode and the ambient temperature is less than or equal to a temperature threshold, controlling the third bypass line 220 to bypass and disconnecting the flow path through the second phase change cold storage unit 230.

[0193] At this time, if Figure 4 As shown, the third bypass line 220 is connected, the first bypass line 140 is connected, and the second bypass line 150 is disconnected. The low-temperature coolant after heat exchange in the second heat exchange unit 120 flows through the first valve port b1 of the second valve group 160 and the second valve port b2 of the second valve group 160, the first phase change cold storage unit 130, the mixing tank 170, the first valve port a1 of the first valve group 400, the fourth valve port a4 of the first valve group 400, the third heat exchange unit 210, the second pump 720, the first valve port c1 of the third valve group 240, the third valve port c3 of the third valve group 240, the fifth valve port a5 of the first valve group 400, the third valve port a3 of the first valve group 400, the first bypass line 140, the electric heating unit 600, the first pump 710, and then returns to the second heat exchange unit 120 to form a complete circulation loop, thereby realizing the combined cold charging of the first phase change cold storage loop 100 and the second phase change cold storage loop 200. Similarly, the third bypass line 220 may be disconnected, the first bypass line 140 may be connected, and the second bypass line 150 may be connected to realize charging only the second phase change cold storage unit 230. At this time, the electric heating unit 600 does not heat.

[0194] When the ambient temperature is less than or equal to the temperature threshold, the second phase-change cold storage unit 230 can be cooled naturally. At this time, the third bypass pipeline 220 bypasses the second phase-change cold storage unit 230, and the cold energy delivered by the compression circuit to the circulation circuit through the second heat exchange unit 120 is only used to charge the first phase-change cold storage unit 130, thereby improving the charging efficiency.

[0195] Reference Fig.17 , Fig.17The control method provided by the embodiment of the present application is shown. In some embodiments, the first phase change cold storage unit 130 in the first phase change cold storage loop 100 is connected in parallel with the second bypass pipeline 150, and the second phase change cold storage unit 230 in the second phase change cold storage loop 200 is connected in parallel with the third bypass pipeline 220, and the control method further includes steps 30 and 40.

[0196] Step 30: When the heat exchange system is in the heating mode, the first phase change cold storage loop 100 and the second phase change cold storage loop 200 are controlled to be connected to form a second circulation loop, and the second bypass line 150 and the third bypass line 220 are both bypassed;

[0197] Step 40 , control the compression circuit to transfer heat to the second circulation circuit through the second heat exchange unit 120 , and disconnect the flow path flowing through the first phase change cold storage unit 130 and the flow path flowing through the second phase change cold storage unit 230 .

[0198] like Figure 5 As shown, when the heat exchange system is in the heating mode, when the coolant circulates in the compression circuit 300, it will flow through the second heat exchange unit 120, the second valve port e2 of the fifth valve group 360, the third valve port e3 of the fifth valve group 360, the liquid reservoir 390, the filter 380 and the throttling element 370, the fourth valve port e4 of the fifth valve group 360, the first valve port e1 of the fifth valve group 360, the fourth heat exchange unit 350, the fourth valve port d4 of the fourth valve group 310, the second valve port d2 of the fourth valve group 310, the gas-liquid separator 320, the compressor 330, the oil separator 340, the third valve port d3 of the fourth valve group 310, and the first valve port d1 of the fourth valve group 310 to form a heating circuit.

[0199] At this time, the third bypass pipeline 220 is connected, the first bypass pipeline 140 is disconnected, and the second bypass pipeline 150 is connected. The high-temperature coolant after heat exchange in the second heat exchange unit 120 flows sequentially through the first valve port b1 of the second valve group 160 and the third valve port b3 of the second valve group 160, the second bypass pipeline 150, the mixing tank 170, the first valve port a1 of the first valve group 400, the fourth valve port a4 of the first valve group 400, the third heat exchange unit 210, and the second pump 70. 20, the first valve port c1 of the third valve group 240, the third valve port c3 of the third valve group 240, the third bypass line 220, the fifth valve port a5 of the first valve group 400, the second valve port a2 of the first valve group 400, the first heat exchange unit 110, the electric heating unit 600, the first pump 710, and then return to the second heat exchange unit 120 to form a complete second circulation loop, so as to realize the joint heating of the first phase change cold storage loop 100 and the second phase change cold storage loop 200. Similarly, the first bypass line 140 can be disconnected, the second bypass line 150 and the third bypass line 220 can be connected to realize heating only for the third heat exchange unit 210, or the first valve port a1 of the first valve group 400 and the second valve port a2 of the first valve group 400 can be connected, the first bypass line 140 can be disconnected, and the second bypass line 150 can be connected to realize heating only for the first heat exchange unit 110. The electric heating unit 600 can also provide additional heat to improve the heating efficiency.

[0200] In addition, when the battery heating demand is not high, the compression circuit 300 can be closed, and the electronic device on the third heat exchange unit 210 generates heat to heat the first heat exchange unit 110. At this time, the third bypass line 220 is connected, the first bypass line 140 is disconnected, and the second bypass line 150 is connected. The coolant flows through the first valve port b1 of the second valve group 160 and the third valve port b3 of the second valve group 160, the second bypass line 150, the mixing tank 170, the first valve group 400 in sequence. The first valve port a1, the fourth valve port a4 of the first valve group 400, the third heat exchange unit 210, the second pump 720, the first valve port c1 of the third valve group 240, the third valve port c3 of the third valve group 240, the third bypass line 220, the fifth valve port a5 of the first valve group 400, the second valve port a2 of the first valve group 400, the first heat exchange unit 110, the electric heating unit 600, the first pump 710, and then back to the second heat exchange unit 120 to form a complete second circulation loop.

[0201] In actual application, the controller controls the valve port in the valve body to communicate, so that the first phase change cold storage circuit 100 and the second phase change cold storage circuit 200 are connected to form a circulation circuit, and the compression circuit 300 transmits heat to the second heat exchange unit 120, so that the temperature of the coolant in the second heat exchange unit 120 increases. After the high-temperature coolant is output from the second heat exchange unit 120, it flows to the first heat exchange unit 110 through the second bypass line 150 to heat the first heating component 510. After passing through the second bypass line 150, the high-temperature coolant can also flow to the third heat exchange unit 210 through the valve body to heat the second heating component 520. The second bypass line 150 and the third bypass line 220 can be set to reduce the heat absorbed by the phase change of the phase change material in the first phase change cold storage unit 130 and the second phase change cold storage unit 230 in the heating mode. The influence on the heating process.

[0202] In some embodiments, the first phase change cold storage unit 130 in the first phase change cold storage circuit 100 is connected in parallel with the second bypass line 150, the inlet of the first phase change cold storage unit 130 and the inlet of the second bypass line 150 are both connected to the second valve group 160, and the outlet of the first phase change cold storage unit 130 and the outlet of the second bypass line 150 are both connected to the mixing tank 170; the control method also includes: obtaining the coolant temperature on the output side of the mixing tank 170; adjusting the flow ratio of the second valve group 160 to the first phase change cold storage unit 130 and the second bypass line 150 according to the coolant temperature.

[0203] The first phase-change cold storage circuit 100 may include a temperature sensor 180. The temperature sensor 180 is mainly used to measure the temperature of the coolant output from the mixing tank 170 and transmit the measurement result to the controller. When the temperature of the coolant output from the mixing tank 170 is lower than the normal working temperature of the first heating component 510, the controller can reduce the flow ratio of the second valve port b2 of the second valve group 160, reduce the coolant flowing through the first phase-change cold storage unit 130, reduce the coolant flowing through the first phase-change cold storage unit 130, and increase the temperature of the coolant output from the third port of the mixing tank 170; when the temperature of the coolant output from the third port of the mixing tank 170 is higher than the normal working temperature of the first heating component 510, the controller can increase the flow ratio of the second valve port b2 of the second valve group 160, increase the coolant flowing through the first phase-change cold storage unit 130, and reduce the temperature of the coolant output from the third port of the mixing tank 170.

[0204] like Figure 2 As shown, the present application also includes a cooling mode. In the cooling mode, the first phase change cold storage circuit 100 and the second phase change cold storage circuit 200 can circulate independently:

[0205] In the first phase-change cold storage circuit 100, the coolant is divided after passing through the second heat exchange unit 120, one of which flows through the first valve port b1 of the second valve group 160, the second valve port b2 of the second valve group 160, and the first phase-change cold storage unit 130, and the other flows through the first valve port b1 of the second valve group 160 and the third valve port b3 of the second valve group 160. The two flows are mixed into one in the mixing tank 170, and then flows through the first valve port a1 of the first valve group 400, the second valve port a2 of the first valve group 400, the first heat exchange unit 110, the electric heating unit 600, the first pump 710, and then returns to the second heat exchange unit 120 to form a complete circulation loop. Of course, the first bypass line 140 can also be connected according to actual needs.

[0206] In the second phase change cold storage circuit 200, the coolant flows in sequence through the third heat exchange unit 210, the second pump 720, the first valve port c1 of the third valve group 240, the second valve port c2 of the third valve group 240, the second phase change cold storage unit 230, the fifth valve port a5 of the first valve group 400, and the fourth valve port a4 of the first valve group 400 to form a complete circulation circuit.

[0207] In practical applications, in order to make full use of the cold energy in the second phase change cold storage unit 230 to cool the first heat exchange unit 110, the first phase change cold storage circuit 100 and the second phase change cold storage circuit 200 can also be connected in series to form a circulation circuit. At this time, when the circulation circuit formed by the two in series and the heat exchange system are in the cold charging mode, the flow mode between the first phase change cold storage circuit 100 and the second phase change cold storage circuit 200 is the same.

[0208] Furthermore, in order to improve the cooling power, the compression circuit 300 can also work synchronously to provide cooling capacity. The working principle of the compression circuit 300 is the same as that in the cold charging mode.

[0209] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A heat exchange system for an equipment, characterized in that: The device comprises a first heat generating component and a second heat generating component, and the heat exchange system comprises: A first phase-change cold storage circuit includes a first heat exchange unit and a second heat exchange unit, wherein the first heat exchange unit is thermally coupled to the first heat generating component; A second phase-change cold storage circuit includes a third heat exchange unit thermally coupled to the second heat generating component; a compression circuit configured to exchange heat with the second heat exchange unit; The first valve group is configured to control the first phase-change cold storage circuit and the second phase-change cold storage circuit to be connected, or to control the first phase-change cold storage circuit and the second phase-change cold storage circuit to be isolated from each other.

2. The heat exchange system according to claim 1, characterized in that: The first phase-change cold storage circuit includes a first heat exchange unit, a first pump, a second heat exchange unit and a first phase-change cold storage unit connected to form a circuit.

3. The heat exchange system according to claim 2, characterized in that: The first pump is connected between the first heat exchange unit and the second heat exchange unit, the first phase change cold storage unit is connected to the output side of the second heat exchange unit, the first valve group is connected between the first phase change cold storage unit and the first heat exchange unit, and the first valve group is used to control the connection and disconnection between the first phase change cold storage unit and the first heat exchange unit, or control the connection and disconnection between the first phase change cold storage unit, the first heat exchange unit and the second phase change cold storage circuit respectively.

4. The heat exchange system according to claim 3, characterized in that: The first phase change cold storage circuit comprises: a first bypass pipeline connected in parallel with the first heat exchange unit; and / or, The second bypass pipeline is connected in parallel with the first phase-change cold storage unit.

5. The heat exchange system according to claim 3, characterized in that: The first phase change cold storage circuit comprises: a second valve group, wherein a first valve port of the second valve group is communicated with a first port of the second heat exchange unit, and a second valve port of the second valve group is communicated with a first port of the first phase-change cold storage unit; A mixing water tank, wherein the first port of the mixing water tank is connected to the second port of the first phase change cold storage unit, the second port of the mixing water tank is connected to the third valve port of the second valve group, and the third port of the mixing water tank is connected to the first valve group.

6. The heat exchange system according to any one of claims 1 to 5, characterized in that: The second phase-change cold storage circuit includes a third heat exchange unit, a second pump, and a second phase-change cold storage unit connected to form a circuit.

7. The heat exchange system according to claim 6, characterized in that: The second pump is connected between the second phase-change cold storage unit and the third heat exchange unit, the first valve group is connected between the second phase-change cold storage unit and the third heat exchange unit, and the first valve group is used to control the connection and disconnection between the second phase-change cold storage unit and the third heat exchange unit, or control the connection and disconnection between the second phase-change cold storage unit, the third heat exchange unit and the first phase-change cold storage circuit respectively.

8. The heat exchange system according to claim 6, characterized in that: The second phase change cold storage circuit comprises: a third valve group, wherein a first valve port of the third valve group is connected to one end of the second pump, and a second valve port of the third valve group is connected to a first port of the second phase-change cold storage unit; A third bypass line, wherein a first port of the third bypass line is communicated with a third valve port of the third valve group, and a second port of the third bypass line is communicated with the first valve group.

9. The heat exchange system according to any one of claims 1 to 5, characterized in that: The phase change temperature of the phase change material in the first phase change cold storage circuit is lower than the phase change temperature of the phase change material in the second phase change cold storage circuit; Alternatively, an electric heating unit is provided on the first phase-change cold storage circuit and / or the second phase-change cold storage circuit.

10. The heat exchange system according to any one of claims 1 to 5, characterized in that: The compression circuit comprises: a fourth valve group, wherein a first valve port of the fourth valve group is in communication with the second heat exchange unit; A gas-liquid separator, a compressor and an oil separator connected in sequence, wherein the inlet of the gas-liquid separator is connected to the second valve port of the fourth valve group, and the outlet of the oil separator is connected to the third valve port of the fourth valve group; a fourth heat exchange unit, wherein a first port of the fourth heat exchange unit is in communication with a fourth valve port of the fourth valve group; a fifth valve group, wherein a first valve port of the fifth valve group is communicated with a second port of the fourth heat exchange unit, and a second valve port of the fifth valve group is communicated with the second heat exchange unit; A liquid reservoir, a filter and a throttling element are connected in sequence, wherein the inlet of the liquid reservoir is connected to the third valve port of the fifth valve group, and the outlet of the throttling element is connected to the fourth valve port of the fifth valve group.

11. An energy storage system, characterized in that: It comprises an energy storage device and a heat exchange system according to any one of claims 1 to 10, the energy storage device comprises a plurality of energy storage cabinets and a liquid cooling unit, the energy storage cabinet comprises an energy storage battery and an electronic device, the energy storage cabinet is provided with a first phase change cold storage circuit and a second phase change cold storage circuit, the liquid cooling unit is provided with a compression circuit, the energy storage battery is thermally coupled to the first phase change cold storage circuit, and the electronic device is thermally coupled to the second phase change cold storage circuit.

12. The energy storage system according to claim 11, characterized in that: The energy storage cabinet includes a shell and a accommodating cavity formed by the shell, wherein a cold storage cavity, an electronic device compartment and the energy storage battery are sequentially arranged from bottom to top in the accommodating cavity, the electronic device compartment is arranged with the electronic device, the cold storage cavity is arranged with a first phase change cold storage unit in the first phase change cold storage circuit, and the shell is arranged with a second phase change cold storage unit in the second phase change cold storage circuit.

13. The energy storage system according to claim 12, characterized in that: An opening is provided on a side of the electronic device compartment body facing the cold storage chamber, a heat dissipation tooth is formed on a side of the cold storage chamber facing the electronic device compartment, the heat dissipation tooth extends into the electronic device compartment through the opening, a fan unit is provided in the electronic device compartment, the fan unit is used to form a gas flow path in the electronic device compartment, and the heat dissipation tooth is located on the gas flow path; or, A fan coil unit is arranged in the electronic device cabin, the inlet of the fan coil unit is communicated with the main output pipeline of the cold storage chamber, the outlet of the fan coil unit is communicated with the main input pipeline of the cold storage chamber, and the fan coil unit is located on the gas flow path.

14. The energy storage system according to any one of claims 11 to 13, characterized in that: The second phase-change cold storage unit is arranged on at least one of the side, top, back sheet metal and door panel of the energy storage cabinet shell.

15. A control method, characterized in that: Applied to the heat exchange system according to any one of claims 1 to 10, the control method comprises: When the heat exchange system is in a cold charging mode, controlling the first phase change cold storage circuit and the second phase change cold storage circuit to be connected to form a first circulation circuit; The compression circuit is controlled to transfer cold energy to the first circulation circuit through the second heat exchange unit.

16. The control method according to claim 15, characterized in that: The first heat exchange unit is connected in parallel with a first bypass pipeline, and the control method further includes: When the heat exchange system is in a cold charging mode, controlling the first bypass pipeline to bypass and disconnecting the flow path passing through the first heat exchange unit; and / or, When the heat exchange system is in the cold charging mode and the ambient temperature is less than or equal to the temperature threshold, the third bypass pipeline is controlled to bypass and the flow path flowing through the second phase change cold storage unit is disconnected.

17. The control method according to claim 15 or 16, characterized in that: The control method further comprises: When the heat exchange system is in a heating mode, the first phase-change cold storage circuit and the second phase-change cold storage circuit are controlled to be connected to form a second circulation circuit, and the second bypass pipeline and the third bypass pipeline are both bypassed; The compression circuit is controlled to transfer heat to the second circulation circuit through the second heat exchange unit, and the flow path flowing through the first phase change cold storage unit and the flow path flowing through the second phase change cold storage unit are disconnected.

18. The control method according to claim 15 or 16, characterized in that: The first phase-change cold storage unit in the first phase-change cold storage circuit is connected in parallel with a second bypass pipeline, the inlet of the first phase-change cold storage unit and the inlet of the second bypass pipeline are both connected to the second valve group, and the outlet of the first phase-change cold storage unit and the outlet of the second bypass pipeline are both connected to the mixing tank; The control method further comprises: Obtaining the coolant temperature at the output side of the mixing tank; The flow ratio of the second valve group to the first phase-change cold storage unit and the second bypass line is adjusted according to the coolant temperature.

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