CN119419410A

CN119419410A - Thermal management devices and energy storage cabinets

Info

Publication number: CN119419410A
Application number: CN202510007310.4A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Yineng Digital Energy Technology Co ltd; Yineng Digital Energy Technology Cangnan Co ltd
Current assignee: Yineng Digital Energy Technology Co ltd; Yineng Digital Energy Technology Cangnan Co ltd
Priority date: 2025-01-03
Filing date: 2025-01-03
Publication date: 2025-02-11

Abstract

The embodiment of the present application provides a thermal management device and an energy storage cabinet. The thermal management device is used for the energy storage cabinet, and the thermal management device includes a first circuit unit, a second circuit unit, a multi-way valve and a phase change heat storage unit; the first circuit unit includes a first heat exchange pipe, and the first heat exchange pipe is used to exchange heat with the energy storage device of the energy storage cabinet; the second circuit unit includes a second heat exchange pipe; the phase change heat storage unit includes a first flow channel, a second flow channel and a phase change part, the first flow channel can be selectively connected to the first heat exchange pipe through the multi-way valve, and the second flow channel is directly connected to the second heat exchange pipe; the phase change part is in thermal contact with the first flow channel and the second flow channel. By providing a thermal management device and making the phase change part in thermal contact with the flow channel, efficient heat exchange between the phase change material and the coolant in the flow channel can be achieved. When the temperature of the coolant in the flow channel increases, the phase change material absorbs heat and undergoes a phase change, and vice versa, which helps to balance the temperature fluctuations in the flow channel.

Description

Thermal management device and energy storage cabinet

Technical Field

The present application relates to the field of thermal management technologies, and in particular, to a thermal management device and an energy storage cabinet.

Background

The energy storage cabinet generally comprises a battery and a PCS (energy storage inverter), and the battery and the PCS are required to work at proper temperature to ensure reliability, safety and performance. The capacity of the battery and the surrounding temperature are closely related, the battery is high in temperature and easy to damage, and meanwhile, the overcharge phenomenon is easy to occur, and under severe conditions, the battery can be out of control thermally, so that the surrounding battery can be out of control continuously, and serious fire and even explosion accidents can be formed finally.

In the related art, liquid cooling is configured on an energy storage battery, an air cooling cold water system is mainly adopted for liquid cooling, low-temperature water is prepared through a compressor system, an ethylene glycol solution is adopted on the water side, and the low-temperature water is conveyed to a battery cold plate through a pump to control the temperature of the battery.

However, the thermal management efficiency of the energy storage battery is poor, resulting in a decrease in the benefits of the energy storage system.

Disclosure of Invention

The embodiment of the application provides a thermal management device and an energy storage cabinet, which can be used for more effectively controlling the thermal management of the energy storage device and the power conversion device of the energy storage cabinet by arranging the thermal management device.

The embodiment of the application provides a thermal management device which is used for an energy storage cabinet and comprises a first loop unit, a second loop unit, a multi-way valve and a phase change heat storage unit;

cooling liquid is uniformly led in the first loop unit and the second loop unit;

The first loop unit comprises a first heat exchange pipeline, and the cooling liquid of the first loop unit is used for exchanging heat with the energy storage device of the energy storage cabinet;

the second loop unit comprises a second heat exchange pipeline, and the cooling liquid of the second loop unit is used for exchanging heat with the power conversion device of the energy storage cabinet;

The phase change heat storage unit comprises a first flow passage, a second flow passage and a phase change part, wherein the first flow passage can be selectively communicated with the first heat exchange pipeline through the multi-way valve, and the second flow passage is communicated with the second heat exchange pipeline;

The phase change portion is in thermal contact with the first flow channel and the second flow channel.

In some embodiments, the first flow channel has a plurality of first flow segments connected end to end in sequence, and the extending directions of a part of the first flow segments intersect;

the second flow passage is provided with a plurality of second flow passage sections which are connected end to end in sequence, and the extending directions of part of the second flow passage sections are intersected;

The phase change portion is located between a partial number of the first flow-through sections and the corresponding second flow-through sections;

any first flow section and the corresponding second flow section are arranged in parallel.

In some embodiments, the phase change thermal storage unit includes a housing, the first flow passage, the second flow passage, and the phase change portion are all located within the housing, wherein,

The phase change heat storage unit is provided with a first cavity, a second cavity and a phase change cavity, the first cavity is communicated with the first flow channel, the second cavity is communicated with the second flow channel, and the phase change part is positioned in the phase change cavity;

the phase change cavity is in close proximity to at least one of the first cavity and the second cavity.

In some embodiments, the number of the first cavities, the second cavities and the phase-change cavities is multiple, and the first cavities and the second cavities are sequentially staggered;

The shell comprises a plurality of partition boards and a plurality of sealing rings, the partition boards and the sealing rings are sequentially staggered, and two adjacent partition boards and the corresponding sealing rings are jointly enclosed to form the first cavity, the second cavity and the phase-change cavity;

the left and right sides of the top of the partition plate are respectively provided with a first top flow opening and a second top flow opening, and the left and right sides of the bottom of the partition plate are respectively provided with a first bottom flow opening and a second bottom flow opening;

The first flow channel is communicated with the first top flow opening and the second bottom flow opening in a staggered way so as to be communicated with the first cavity;

The second flow channel is in staggered communication with the second overhead flow opening and the first underflow opening to communicate with the second cavity.

In some embodiments, the housing comprises an aluminum extrusion housing having a plurality of the phase change cavities arranged in an array within the aluminum extrusion housing,

The phase change cavities are respectively positioned at two sides of the first cavity and the second cavity.

In some embodiments, the first flow channel and the second flow channel are arranged in the shell at intervals, and the phase change part covers the peripheries of the first flow channel and the second flow channel;

the shell comprises a cylindrical shell, the first flow passage and the second flow passage are both in a coil shape, and the phase change part is filled in the cylindrical shell;

Or alternatively

The shell comprises a rectangular shell, the first runner and the second runner are both loop-shaped pipes with multiple bending, and the phase change part is filled in the rectangular shell.

In some embodiments, the phase change thermal storage unit further comprises an upper cover provided with at least a first opening, a second opening, a third opening, and a fourth opening, the first opening being disposed adjacent to the third opening, the second opening being disposed adjacent to the fourth opening, the first opening and the second opening being located on opposite sides of the upper cover;

Two ends of the first runner are respectively communicated with the first opening and the second opening, and two ends of the second runner are respectively communicated with the third opening and the fourth opening;

Or alternatively

The two ends of the first runner are respectively communicated with the first opening and the third opening, and the two ends of the second runner are respectively communicated with the second opening and the fourth opening.

In some embodiments, the first loop unit further comprises a refrigeration part, a heater, a first pump and a first wind-liquid heat exchanger, wherein the first pump and the first wind-liquid heat exchanger are both communicated with a first heat exchange pipeline;

The refrigerating part comprises a condenser, a compressor, a plate exchanger and a throttle valve, wherein the refrigerating part is used for refrigerating the cooling liquid flowing in the first heat exchange pipeline through the plate exchanger;

The second loop unit further comprises a second wind-liquid heat exchanger and a second pump, and the second wind-liquid heat exchanger and the second pump are both communicated with a second heat exchange pipeline.

In some embodiments, the first loop unit further comprises a third auxiliary conduit;

The multi-way valve is a four-way valve, a fourth valve port of the four-way valve is communicated with a first pump through a first wind-liquid heat exchanger, a fifth valve port of the four-way valve is communicated with the first heat exchange pipeline, a sixth valve port of the four-way valve is communicated with the first flow channel, and two ends of the third auxiliary pipeline are respectively communicated with a seventh valve port of the four-way valve and the first pump.

In a second aspect, an embodiment of the present application further provides an energy storage cabinet, including an energy storage device, a power conversion device, and the thermal management device;

The heat exchange structure of the energy storage device is communicated with the first heat exchange pipeline of the heat management device, and the heat exchange structure of the power conversion device is communicated with the second heat exchange pipeline of the heat management device.

In some embodiments, the phase change portion of the thermal management device has a threshold temperature;

The energy storage cabinet further comprises a controller and a temperature sensor electrically connected with the controller, wherein the temperature sensor is used for acquiring detection temperature;

the controller is provided with a preset temperature lower than the threshold temperature, and is configured to acquire the detection temperature provided by the temperature sensor, and control the communication relation between the multi-way valve and the first flow passage according to the working state of the energy storage cabinet, the detection temperature and the preset temperature of the controller so as to delay the heat release of the second heat exchange pipeline to the first heat exchange pipeline and the second wind-liquid heat exchanger.

According to the thermal management device and the energy storage cabinet provided by the embodiment of the application, the phase-change heat storage unit is added, so that the characteristics of absorbing and releasing a large amount of heat in the phase-change process of the phase-change material can be utilized, the temperatures of the energy storage device and the power conversion device are effectively balanced, the thermal management efficiency is improved, in addition, the phase-change heat storage unit is beneficial to avoiding abrupt change of the temperature, and the reliability of the energy storage cabinet is improved.

Therefore, the battery in the energy storage device can be ensured to work in a proper temperature range, the aging speed of the battery is reduced, the service life of the battery is prolonged, and the risks of overheating and thermal runaway of the battery can be reduced, so that the safety of the energy storage cabinet is improved, and safety accidents such as fire and explosion are avoided. In addition, the power conversion device can be ensured to work in a proper temperature range, and the phenomenon that the normal work is influenced by excessive heat released by overlong working time of the power conversion device is avoided.

The first flow passage is selectively communicated with the first heat exchange pipeline through the multi-way valve, the selective communication can provide higher flexibility, the heat capacity characteristic of the phase change material is used for adjusting when the temperature fluctuation of the energy storage device is larger, and the first flow passage can be disconnected when the temperature is stable so as to save energy and resources, and the arrangement is beneficial to optimizing the overall efficiency of the heat management system.

The second flow channel is directly communicated with the second heat exchange pipeline, so that the temperature fluctuation of the power conversion device is effectively buffered, unstable performance caused by overlarge temperature change is avoided, and the reliability of the power conversion device is improved.

By arranging the phase change part adjacent to the flow channel, efficient heat exchange between the phase change material and the cooling liquid in the flow channel can be realized. As the temperature of the cooling fluid in the flow channel increases, the phase change material absorbs heat and changes phase, and vice versa, helping to balance temperature fluctuations in the flow channel.

The phase change process of the phase change material can absorb or release a large amount of heat, so that buffering is provided when the temperature fluctuates, the temperature stability of the energy storage device and the power conversion device is maintained, and unstable performance caused by overlarge temperature change is avoided.

The ability of the phase change material to absorb and release heat during the phase change process reduces the need for external heating or cooling, thereby reducing energy consumption and improving overall energy efficiency.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic view of a first structure of an energy storage cabinet provided by the application;

fig. 2 is a schematic diagram of a second structure of the energy storage cabinet provided by the application;

Fig. 3 is a schematic diagram of a first structure of a phase-change heat storage unit of the energy storage cabinet provided by the application;

fig. 4 is a schematic diagram of a first structure of a phase-change heat storage unit of the energy storage cabinet provided by the application;

fig. 5 is a schematic diagram of a first structure of a phase-change heat storage unit of the energy storage cabinet provided by the application;

fig. 6 is a schematic diagram of a first structure of a phase-change heat storage unit of the energy storage cabinet provided by the application;

Fig. 7 is a schematic diagram of a first structure of a phase-change heat storage unit of the energy storage cabinet provided by the application;

Fig. 8 is a schematic diagram of a first structure of a phase-change heat storage unit of the energy storage cabinet provided by the application;

Fig. 9 is a schematic diagram of a first structure of a phase-change heat storage unit of the energy storage cabinet provided by the application;

Fig. 10 is a schematic diagram of a third structure of the energy storage cabinet provided by the application;

FIG. 11 is a schematic illustration of a third configuration of an energy storage cabinet according to the present application;

Fig. 12 is a schematic diagram of a fourth structure of the energy storage cabinet provided by the application;

Fig. 13 is a schematic communication diagram of a fourth structure of the energy storage cabinet provided by the application;

Fig. 14 is a schematic diagram of a fifth structure of the energy storage cabinet provided by the application;

Fig. 15 is a schematic communication diagram of a fifth structure of the energy storage cabinet provided by the application.

Reference numerals illustrate:

20. the energy storage cabinet, 21, the energy storage device, 22, the power conversion device;

10. thermal management device, 11, radiator fan, 1101, first fan, 1102, second fan;

100. The first loop unit comprises 110 parts of a first heat exchange pipeline, 120 parts of a refrigerating part, 121 parts of a compressor, 122 parts of a condenser, 123 parts of a plate exchanger, 130 parts of a heater, 140 parts of a first auxiliary pipeline, 150 parts of a second auxiliary pipeline, 160 parts of a third auxiliary pipeline, 170 parts of a first pump, 180 parts of a first wind-liquid heat exchanger;

200. A second loop unit; 210, a second heat exchange pipeline, 220, a second wind-liquid heat exchanger, 230, a second pump;

300. The phase change heat storage unit comprises a phase change heat storage unit 301, a first cavity 302, a second cavity 303 and a phase change cavity;

310. the device comprises a first runner, a first flow passage section, a second runner, a first flow passage 321, a second flow passage section 330 and a phase change part, wherein the first runner is provided with a first flow passage;

340. a shell 341, a baffle 342, a sealing ring 343, a first top flow opening 344, a second top flow opening 345, a first bottom flow opening 346 and a second bottom flow opening;

350. upper cover 351, first opening 352, second opening 353, third opening 354, fourth opening;

400. A multi-way valve;

410. Three-way valve 411, first valve port 412, second valve port 413, third valve port;

420. Four-way valve 421, fourth valve port 422, fifth valve port 423, sixth valve port 424 and seventh valve port.

Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the preferred embodiments of the present application will be described in more detail with reference to the accompanying drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals refer to the same or similar device elements or device elements having the same or similar functions throughout. The described embodiments are part of the apparatus embodiments of the application and are not the full apparatus embodiments. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, in a first aspect, an embodiment of the present application provides an energy storage cabinet 20 including an energy storage device 21, a power conversion device 22, and a thermal management device 10.

The energy storage device 21 is typically composed of a plurality of battery modules, and the energy storage device 21 may be installed at one side of the energy storage cabinet 20. A power conversion device 22, such as an energy storage inverter, may be mounted on the other side of the energy storage cabinet 20. Some of the components of thermal management device 10 are in thermally conductive contact with energy storage device 21 and power conversion device 22 and are responsible for regulating and managing the temperatures of energy storage device 21 and power conversion device 22.

Referring to fig. 1 and 2, in a second aspect, embodiments of the present application also provide a thermal management device 10. Specifically, the thermal management device 10 includes a first loop unit 100, a second loop unit 200, and a phase change thermal storage unit 300.

The first circuit unit 100 includes a first heat exchange pipe 110, the second circuit unit 200 includes a second heat exchange pipe 210, and the cooling liquid is uniformly circulated in the first circuit unit 100 and the second circuit unit 200. For example, the cooling fluid may flow through the first heat exchange pipe 110 of the first circuit unit 100 and the second heat exchange pipe 210 of the second circuit unit 200.

It will be appreciated that the cooling fluid may be selected according to the circumstances. By way of example, the cooling fluid may be water, an aqueous glycol solution, or the like. The embodiment of the present application is not limited to the type of the cooling liquid flowing through the first heat exchange tube 110 and the second heat exchange tube 210, and is not limited to the above example.

A heat exchange structure may be disposed in the energy storage device 21 and the power conversion device 22, and the heat exchange structure may perform heat transfer with the first circuit unit 100 or the second circuit unit 200, so as to conduct heat during operation or obtain heat when the temperature is insufficient.

In some embodiments, the cooling liquid of the first circuit unit 100 is used for exchanging heat with the energy storage device 21, specifically, the cooling liquid in the first heat exchange tube 110 may flow through a heat exchange structure of the energy storage device 21, that is, the heat exchange structures of the first heat exchange tube 110 and the energy storage device 21 are communicated, so that the cooling liquid of the first circuit unit 100 may flow through the heat exchange structure to cool or heat the energy storage device 21. The cooling liquid in the second circuit unit 200 exchanges heat with the power conversion device 22, specifically, the cooling liquid in the second heat exchange pipe 210 may flow through a heat exchange structure of the power conversion device 22, that is, the second heat exchange pipe 210 communicates with the heat exchange structure of the power conversion device 22, so that the cooling liquid in the first circuit unit 100 may flow through the heat exchange structure to cool the power conversion device 22. The heat exchange between the components may in particular be achieved by direct or indirect heat conducting contact. The cooling fluid is also a component.

In other embodiments, the heat exchange between the cooling liquid of the first circuit unit 100 and the heat exchange structure of the energy storage device 21 may be indirectly performed by the heat-conducting contact between the first heat exchange pipeline 110 and the heat exchange structure of the energy storage device 21, or the heat exchange between the cooling liquid of the second circuit unit 200 and the heat exchange structure of the power conversion device 22 may be indirectly performed by the heat-conducting contact between the second heat exchange pipeline 210 and the heat exchange structure of the power conversion device 22. In this embodiment, the heat exchange structure need not to set up the coolant liquid circulation passageway, only need make corresponding heat exchange pipeline and heat exchange structure abundant heat conduction contact can, be favorable to reducing the design degree of difficulty of heat exchange structure.

The phase change thermal storage unit 300 includes a phase change material, such as a paraffin or salt-based material, which is capable of absorbing or releasing a large amount of heat during the phase change.

The first loop unit 100 and the second loop unit 200 are independent from each other, can control the temperature of the energy storage device 21 and the power conversion device 22 in a targeted manner, improve the flexibility and the efficiency of heat management, and are convenient to maintain and overhaul, and can independently maintain the cooling system of the energy storage device 21 or the power conversion device 22 without affecting the other part.

The phase change heat storage unit 300 is connected in series with one of the first heat exchange pipe 110 and the second heat exchange pipe 210 and connected in parallel with the other of the first heat exchange pipe 110 and the second heat exchange pipe 210.

In addition, serial connection means that both directly circulate.

In some embodiments, the phase change thermal storage unit 300 is connected in series with the first heat exchange conduit 110. At this time, the cooling liquid in the first heat exchange pipeline 110 may enter the phase-change heat storage unit 300 after passing through the energy storage device 21 (specifically, the heat exchange structure of the energy storage device 21), and the phase-change heat storage unit 300 may perform heat exchange with the cooling liquid to absorb or release heat from the cooling liquid flowing through the first heat exchange pipeline 110.

In some embodiments, the phase change thermal storage unit 300 is connected in parallel with the first heat exchange conduit 110. At this time, the cooling fluid in the first heat exchange pipe 110 may enter the phase-change heat storage unit 300 after passing through the power conversion device 22 (specifically, after passing through the heat exchange structure of the power conversion device 22), and the phase-change heat storage unit 300 may perform heat exchange with the cooling fluid to absorb or release heat from the cooling fluid flowing through the first heat exchange pipe 110.

Parallel connection means that both selectively circulate.

In some embodiments, the phase change thermal storage unit 300 is connected in parallel with the first heat exchange conduit 110. At this time, the cooling liquid in the first heat exchange pipe 110 may or may not pass through the phase change heat storage unit 300. Can be adjusted according to the actual situation.

In some embodiments, the phase change thermal storage unit 300 is connected in parallel with the second heat exchange conduit 210. At this time, the cooling liquid in the first heat exchange pipe 110 may or may not pass through the phase change heat storage unit 300. Can be adjusted according to the actual situation.

According to the energy storage cabinet 20 provided by the embodiment of the application, the first loop unit 100 and the second loop unit 200 are arranged to be respectively and independently connected with the energy storage device 21 and the power conversion device 22, so that the temperature of the energy storage device 21 and the power conversion device 22 can be controlled in a targeted manner, the flexibility and the efficiency of heat management are improved, and the two loop units are convenient to maintain and overhaul, and the cooling system of the energy storage device 21 or the power conversion device 22 can be independently maintained without affecting the other part.

By adding the phase-change heat storage unit 300, the temperature of the energy storage device 21 and the power conversion device 22 can be effectively balanced by utilizing the characteristic that the phase-change material absorbs and releases a large amount of heat in the phase-change process, so that the efficiency of heat management is improved, and in addition, the phase-change heat storage unit 300 helps to avoid abrupt temperature change and improve the reliability of the energy storage cabinet 20.

In this way, the battery in the energy storage device 21 can be ensured to work in a proper temperature range, the aging speed of the battery is reduced, the service life of the battery is prolonged, and the risks of overheating and thermal runaway of the battery can be reduced, so that the safety of the energy storage cabinet 20 is improved, and safety accidents such as fire and explosion are avoided. In addition, the power conversion device 22 can be ensured to work in a proper temperature range, and the influence of excessive heat released by the overlong working time of the power conversion device 22 on the normal work is avoided.

The phase-change heat storage unit 300 is connected with one of the first heat exchange pipeline 110 and the second heat exchange pipeline 210 in series, and connected with the other in parallel, so that the cooling liquid firstly exchanges heat through the phase-change heat storage unit 300 and then transfers the heat to the other loop in the flowing process, thereby more effectively utilizing the heat exchange capacity of the phase-change heat storage unit 300 and improving the overall heat management performance.

By using the serial connection and parallel connection between the two loop units and the phase-change heat storage unit 300, the energy storage cabinet 20 can make the phase-change heat storage unit 300 exchange heat with different loops respectively under the appropriate condition, so as to improve the heat exchange efficiency.

Through the aforementioned thermal management device 10, the energy storage cabinet 20 can adapt to different detection temperatures, so that the energy storage device 21 and the power conversion device 22 can work normally even under extreme temperatures. By maintaining effective thermal management, degradation in battery performance due to excessive temperatures may be reduced, improving the overall energy efficiency and safety of the energy storage cabinet 20.

In order to ensure that the coolant flows through the first heat exchange pipe 110 and the second heat exchange pipe 210, pumps are provided in each of the first circuit unit 100 and the second circuit unit 200.

Referring to fig. 2, as an alternative embodiment, the first circuit unit 100 further includes a cooling part 120 and a heater 130, and each of the cooling part 120 and the heater 130 can cool or heat the coolant in the first circuit unit 100.

The refrigerating unit 120 serves to reduce the temperature of the cooling liquid (i.e., the cooling liquid of the first circuit unit 100) in the first heat exchange pipe 110. The refrigerating unit 120 may be realized by compressor refrigeration, thermoelectric refrigeration, or the like. In the embodiment of the present application, the refrigerating unit 120 performs compression refrigeration. The refrigerating unit 120 is configured to ensure that the temperature of the energy storage device 21 can be effectively reduced and overheat can be prevented when the detected temperature is high or the amount of heat generated by the battery is large.

The heater 130 serves to raise the temperature of the cooling fluid (i.e., the cooling fluid of the first circuit unit 100) in the first heat exchange pipe 110. The method is important when the detection temperature is low, and can be realized by means of an electric heater and the like. The heater 130 serves to ensure that the temperature of the energy storage device 21 can be maintained within a proper range under a low temperature environment, preventing degradation of battery performance.

By providing the refrigerating part 120 and the heater 130 in the first circuit unit 100, accurate temperature control of the energy storage device 21 can be achieved, different environmental conditions can be adapted, and performance and life of the energy storage device 21 can be improved.

In some embodiments, the phase change thermal storage unit 300 is in direct communication with the second heat exchange conduit 210, and the phase change thermal storage unit 300 is in selective communication with the first heat exchange conduit 110. I.e. the phase change heat storage unit 300 is always connected to the second heat exchange pipe 210, the cooling fluid in the second circuit unit 200 must pass through the phase change heat storage unit 300 after passing through the power conversion device 22. In this way, the phase change thermal storage unit 300 may absorb or release heat through the thermal capacity characteristics of the phase change material to balance the temperature of the power conversion device 22.

By direct communication, it is ensured that temperature fluctuations of the power conversion device 22 are effectively buffered, unstable performance due to excessive temperature variation is avoided, and reliability of the power conversion device 22 is improved.

In some embodiments, the phase change thermal storage unit 300 may be connected or disconnected from the first heat exchange pipe 110 as desired.

The selective communication may provide a high flexibility allowing for adjustment by utilizing the thermal capacity characteristics of the phase change material when the energy storage device 21 temperature fluctuates significantly, and may be disconnected to save energy and resources when the temperature stabilizes, which may help optimize the overall efficiency of the thermal management system.

Referring to fig. 1, as an alternative embodiment, a phase change thermal storage unit 300 includes a first flow channel 310, a second flow channel 320, and a phase change portion 330. At this time, the thermal management device 10 may further include a multi-way valve 400.

Specifically, the first flow channel 310 and the second flow channel 320 are two independent channels in the phase change thermal storage unit 300, respectively for different loop units. Through the above arrangement, the two loop units independently operate in the phase change thermal storage unit 300, avoiding direct transfer of heat between the two loops, thereby improving flexibility and efficiency of thermal management.

The first flow channel 310 and the second flow channel 320 are arranged at intervals through the phase change part 330. The phase change portion 330 is made of a phase change material. The phase change portion 330 can effectively absorb or release heat when the temperature changes, so as to balance the temperatures of the energy storage device 21 and the power conversion device 22, thereby helping to avoid abrupt temperature changes and improving the stability and reliability of the energy storage cabinet 20.

The first flow passage 310 selectively communicates with the first heat exchange tube 110 through the multi-way valve 400 and the second flow passage 320 directly communicates with the second heat exchange tube 210.

Through the above arrangement, the cooling liquid in the first heat exchange pipe 110 may selectively pass through the phase change heat storage unit 300, and the cooling liquid in the second heat exchange pipe 210 directly passes through the phase change heat storage unit 300. The above arrangement can improve the utilization rate of the phase change heat storage unit 300, ensuring that heat exchange can be effectively performed when needed.

The multi-way valve 400 is used to control the connection of the first flow passage 310 to the first heat exchange pipe 110 so that it can be connected in parallel so that the cooling liquid can selectively flow through the phase change heat storage unit 300.

By controlling the multi-way valve 400, the thermal management device 10 can adjust the flow path of the cooling liquid according to actual needs, and dynamically adjust the flow path to realize better temperature control, so as to optimize the thermal management process.

Referring to fig. 1, as an alternative embodiment, the phase change portion 330 is in thermally conductive contact with the first and second flow channels 310, 320.

From the above, the heat conduction contact means that the phase change material is in direct contact with the cooling liquid in the flow channel or in indirect contact with the cooling liquid in the flow channel through the heat conduction material, so that the phase change material and the cooling liquid in the flow channel can perform effective heat exchange.

By thermally contacting the phase change portion 330 with the flow channel, efficient heat exchange between the phase change material and the cooling fluid in the flow channel can be achieved. As the temperature of the cooling fluid in the flow channel increases, the phase change material absorbs heat and changes phase, and vice versa, helping to balance temperature fluctuations in the flow channel.

The phase change process of the phase change material can absorb or release a large amount of heat, thereby providing buffering when the temperature fluctuates, helping to maintain the temperature stability of the energy storage device 21 and the power conversion device 22, and avoiding unstable performance caused by overlarge temperature change.

Because the phase change portion 330 may be in thermally conductive contact with the first and second flow channels 310, 320, the thermal management device 10 may be selectively temperature conditioned as desired using the thermal capacity characteristics of the phase change material.

Referring to fig. 3, as an alternative embodiment, the first flow channel 310 has a plurality of first flow segments 311 connected end to end in sequence, and a plurality of consecutive flow segments are connected in sequence to form a complete flow path.

The intersection of the extension directions of a partial number of the first flow segments 311, that is, the intersection of partial flow segments with each other in the first flow channel 310, may increase the length and complexity of the flow channel, thereby increasing the contact area and time with the phase change material.

By increasing the complexity of the flow channel and prolonging the flow path of the cooling liquid, the heat exchange efficiency between the cooling liquid and the phase change material can be improved, the heat capacity characteristic of the phase change material can be effectively utilized, and the temperature regulation capability can be enhanced.

The second flow channel 320 has a plurality of second flow channel segments 321 connected end to end, and the extending directions of a part of the second flow channel segments 321 intersect, and the second flow channel 320 is similar to the first flow channel 310, and will not be described herein.

The phase change portion 330 is located between at least a portion of the number of first flow segments 311 and the corresponding second flow segments 321, enabling the phase change material to exchange heat with the cooling fluid in both flow channels simultaneously.

With the above arrangement, the phase change material can simultaneously regulate the temperatures of the energy storage device 21 and the power conversion device 22. The aforementioned dual regulation capability increases the thermal management efficiency of thermal management device 10, ensuring that both energy storage device 21 and power conversion device 22 operate within a preferred temperature range.

Referring to fig. 3, as an alternative embodiment, the extending directions of a part of the first circulation segments 311 are intersected, and the extending directions of a part of the second circulation segments 321 are intersected, so that the heat exchange efficiency between the cooling liquid and the phase change material can be improved by the intersected circulation segment design, which is helpful for distributing heat more uniformly and enhancing the temperature regulating capability, especially in the case of uneven heat load.

Any first flow-through section 311 and the corresponding second flow-through section 321 are arranged in parallel. The parallel arrangement ensures structural symmetry and consistency of heat exchange between the two flow channels.

Through the arrangement, the flow channels which are arranged in parallel can provide a more uniform temperature gradient and a more stable heat flow path, so that the phase change material can be ensured to be capable of adjusting the temperatures of the energy storage device 21 and the power conversion device 22 at the same time, and the overall heat management efficiency is improved.

Referring to fig. 3, as an alternative embodiment, the phase change thermal storage unit 300 includes a housing 340, and the first flow channel 310, the second flow channel 320, and the phase change portion 330 are all located in the housing 340.

The housing 340 may provide physical protection and structural support, ensure that the flow channels and phase change material operate in a controlled environment, help reduce the impact of the external environment on the thermal management system, and improve the reliability and durability of the thermal management system and the energy storage cabinet 20.

It is understood that the phase change heat storage unit 300 has different shapes, which will be exemplified below.

Referring to fig. 4, in some embodiments, the phase change thermal storage unit 300 has a first cavity 301, a second cavity 302, and a phase change cavity 303, the first cavity 301 is communicated with a first flow channel 310, the second cavity 302 is communicated with a second flow channel 320, and the phase change portion 330 is located in the phase change cavity 303, i.e., each flow channel is provided with a corresponding cavity for flow and heat exchange of cooling liquid.

With the above arrangement, the thermal management device 10 can effectively manage the thermal loads of the different flow paths. On the basis, the interval arrangement of the first cavity 301 and the second cavity 302 can ensure that the temperature adjustment of the energy storage device 21 and the power conversion device 22 can be independently carried out, and the accuracy of heat management is improved.

The phase change cavity 303 is proximate to at least one of the first cavity 301 and the second cavity 302.

The close fitting of the phase change cavity 303 can improve the contact area between the phase change material and the flow channel, and enhance the heat exchange efficiency. Through the aforementioned thermal coupling, the phase change material can rapidly respond to temperature changes, provide timely thermal buffering and regulation, reduce the risk of overheating and thermal runaway, and improve the safety of the energy storage cabinet 20.

Referring to fig. 4 and fig. 5, in some embodiments, the number of the first cavities 301, the second cavities 302, and the phase-change cavities 303 is multiple, and the multiple first cavities 301 and second cavities 302 are sequentially staggered.

Through setting up a plurality of cavitys of staggered arrangement, can improve the contact frequency and the area of coolant liquid and phase change material to reinforcing heat exchange efficiency helps evenly distributed heat load, improves temperature regulation's accuracy.

Referring to fig. 6, the casing 340 includes a plurality of separators 341 and a plurality of sealing rings 342, the plurality of separators 341 and the plurality of sealing rings 342 are sequentially staggered, and two adjacent separators 341 and the corresponding sealing rings 342 enclose together to form a first cavity 301, a second cavity 302 and a phase-change cavity 303.

The housing 340 described above allows each cavity to be independently and efficiently thermally managed. And each cavity can be modularized, and the whole shell 340 can be expanded. By using the seal ring 342, the sealing property between the cavities can be ensured, the leakage of the coolant can be prevented, and the reliability of the thermal management device 10 and the energy storage cabinet 20 can be improved.

The top left and right sides of the partition 341 are provided with a first top flow opening 343 and a second top flow opening 344, respectively, and the bottom left and right sides of the partition 341 are provided with a first bottom flow opening 345 and a second bottom flow opening 346, respectively.

It is appreciated that the first top flow opening 343, the second top flow opening 344, the first underflow opening 345 and the second underflow opening 346 may be located at corners of the partition wall 341, respectively, to raise the distance of the flow path.

By the arrangement, the cooling liquid flows in a staggered manner between different cavities, so that the complexity of a flow path and the residence time of the cooling liquid can be increased, and the heat exchange efficiency is improved.

The first flow channel 310 alternately communicates with the first top flow opening 343 and the second bottom flow opening 346 to communicate with the first chamber 301, and the second flow channel 320 alternately communicates with the second top flow opening 344 and the first bottom flow opening 345 to communicate with the second chamber 302.

Through the arrangement, the first flow channels 310 and the second flow channels 320 are communicated in a staggered manner, so that the cooling liquid can fully exchange heat with the phase change material in the flowing process. In this way, not only is the efficiency of thermal management improved, but also the uniformity of temperature regulation is ensured, reducing the risk of local overheating.

Referring to fig. 7, in some embodiments, the housing 340 comprises an aluminum extrusion. Aluminum has high thermal conductivity, is favorable for rapidly conducting heat, uniformly distributes temperature, and reduces the risk of local overheating. In addition, the structural strength and lightweight characteristics of the aluminum extruded shell improve the durability and portability of the phase change thermal storage unit 300.

The aluminum extrusion shell is provided with a plurality of phase-change cavities 303, and the plurality of phase-change cavities 303 are arranged in an array in the aluminum extrusion shell. The phase change cavities 303 arranged in an array can increase the contact area and frequency of the phase change material and the cooling liquid, so that the heat exchange efficiency is improved, the heat load is uniformly distributed, and the accuracy and the response speed of temperature regulation are improved.

The plurality of phase change cavities 303 are located at two sides of the first cavity 301 and the second cavity 302, respectively. By placing the phase change cavity 303 on both sides of the first cavity 301 and the second cavity 302, the phase change material is capable of adjusting the temperature of the energy storage device 21 and the power conversion device 22 at the same time, so that the overall thermal management efficiency of the thermal management device 10 can be improved, so as to ensure that both the energy storage device 21 and the power conversion device 22 can operate within a preferred temperature range.

In some embodiments, the first flow channel 310 and the second flow channel 320 are disposed in a spaced apart relationship within the housing 340. The spaced-apart flow channel designs help reduce thermal interference so that each flow channel can independently exchange heat, which can improve the thermal management efficiency of the thermal management device 10.

The phase change portion 330 covers the outer circumferences of the first flow path 310 and the second flow path 320. By covering the periphery of the flow channel with the phase change portion 330, the phase change material can effectively absorb and release heat conducted by the flow channel, so that heat exchange efficiency can be improved, rapid response to temperature change is ensured, and stable temperature regulation is provided.

Referring to fig. 8, in some embodiments, the housing 340 comprises a cylindrical shell, and the first flow channel 310 and the second flow channel 320 are each coiled.

The cylindrical shell is matched with the coiled flow channel, the coiled flow channel can increase the length of the flow channel and the residence time of the cooling liquid, the heat exchange efficiency is improved, and the flow of the cooling liquid is promoted by utilizing the gravity and the fluid dynamics characteristics.

The phase change portion 330 is filled in the cylindrical shell, and the phase change material is completely in the space outside the flow path in the shell 340, ensuring close contact with the flow path.

The filling of the phase change material ensures that heat between the flow channels can be quickly transferred to the phase change material for absorption or release. The tight thermal coupling described above may improve the response speed and temperature stability of thermal management device 10, reducing the risk of localized overheating and temperature fluctuations.

Referring to fig. 9, in some embodiments, the housing 340 comprises a rectangular shell. The rectangular shell has certain stability, is easy to install, is beneficial to optimizing space utilization, and enables the configuration of the runner and the phase change material to be compact and efficient.

The first flow channel 310 and the second flow channel 320 are both loop-shaped pipes with multiple bends. The multi-bent loop tube can increase the length of the flow channel and the residence time of the cooling liquid, thereby improving the heat exchange efficiency. The complex flow path ensures that the cooling liquid can fully exchange heat with the phase change material, and the temperature regulation capability is enhanced.

The phase change portion 330 is filled in the rectangular case. The filling of the phase change material ensures that heat between the flow channels can be quickly transferred to the phase change material for absorption or release. The tight thermal coupling described above may improve the response speed and temperature stability of thermal management device 10, reducing the risk of localized overheating and temperature fluctuations.

Referring to fig. 7 or 9, as an alternative embodiment, the phase-change thermal storage unit 300 further includes an upper cover 350, the upper cover 350 being provided with at least a first opening 351, a second opening 352, a third opening 353, and a fourth opening 354, the first opening 351 being disposed adjacent to the third opening 353, the second opening 352 being disposed adjacent to the fourth opening 354, the first opening 351 and the second opening 352 being located at opposite sides of the upper cover 350. The openings are used for connecting the flow channels and allowing the cooling liquid to enter and exit.

It will be appreciated that the upper cover 350 may provide a closed structure to ensure the safety and tightness of the internal components. The opening allows the runner to communicate with the outside, forming a complete cooling circuit.

The arrangement of the openings described above allows the flow channels to form alternating flow paths within the housing 340. Adjacent and opposite openings help optimize fluid flow, reduce flow resistance, and ensure uniform distribution of coolant in the flow channels.

Referring to fig. 9, in some embodiments, two ends of the first flow channel 310 communicate with the first and second openings 351 and 352, respectively, and two ends of the second flow channel 320 communicate with the third and fourth openings 353 and 354, respectively.

Ensuring that each flow channel forms an independent circulation path allows for efficient circulation of the coolant in the system. By this design, the first flow channel 310 and the second flow channel 320 can independently perform heat exchange, so as to reduce mutual interference and improve the thermal management efficiency of the thermal management device 10 and the energy storage cabinet 20.

Through accurate trompil configuration and runner connection, heat management device 10 and energy storage cabinet 20 can realize efficient fluid management, ensure that the coolant liquid can flow through the phase change material fast and evenly, realize best heat exchange effect.

Referring to fig. 7, in some embodiments, two ends of the first flow channel 310 communicate with the first opening 351 and the third opening 353, respectively, and two ends of the second flow channel 320 communicate with the second opening 352 and the fourth opening 354, respectively.

The above-described communication method ensures that each flow passage forms an independent circulation path, and that the coolant can be circulated efficiently in the thermal management device 10. By this design, the first flow channel 310 and the second flow channel 320 can independently perform heat exchange, reduce mutual interference, and improve the thermal management efficiency of the thermal management device 10. The independent flow channel circulation also helps to precisely control the temperature regulation of each flow channel.

Through accurate trompil configuration and runner connection, the heat management device 10 can realize efficient fluid management, ensures that the coolant liquid can flow through the phase change material fast and evenly, realizes better heat exchange effect.

Referring to fig. 10, 12 and 14, as an alternative embodiment, the first circuit unit 100 further includes a first pump 170, a refrigerating unit 120, a heater 130, and the aforementioned first wind-liquid heat exchanger 180. The first pump 170 and the first wind-liquid heat exchanger 180 are both communicated with the first heat exchange pipeline 110, the refrigerating part 120 is used for refrigerating the cooling liquid flowing through the first heat exchange pipeline 110, and the heater 130 is used for heating the cooling liquid flowing through the first heat exchange pipeline 110.

In some embodiments, the refrigeration section 120 is a refrigeration system comprising a condenser 122, a compressor 121, a plate exchanger 123, and a throttle valve, the condenser 122, the compressor 121, and the throttle valve being in communication with the first heat exchange conduit 110 through the plate exchanger 123.

The refrigerating unit 120 adjusts the temperature of the coolant by compression, condensation, and heat exchange. The compressor 121 increases the pressure and temperature of the refrigerant, the condenser 122 liquefies the refrigerant by heat dissipation, and the second wind-liquid heat exchanger 220 exchanges heat by contact with the cooling liquid. The throttle valve is used to reduce the pressure of the cooling liquid. The refrigeration unit 120 can provide a certain active temperature adjustment capability, and can effectively reduce the temperature inside the energy storage cabinet 20 under high temperature conditions.

In some embodiments, the second circuit unit 200 further includes a second windage heat exchanger 220 and a second pump 230. The second pump 230 and the second wind-liquid heat exchanger 220 are both communicated with the second heat exchange pipeline 210. Wherein the second pump 230 is used to drive the flow of the cooling liquid. The second wind-liquid heat exchanger 220 is used for exchanging heat in the second heat exchanging pipe 210, and helps to manage the temperature of the power conversion device 22. Through effective heat exchange, the second wind-liquid heat exchanger 220 can independently adjust the temperature of the second heat exchange pipeline 210 without affecting the first heat exchange pipeline 110, thereby improving the efficiency of the heat management device 10.

In some embodiments, thermal management device 10 further comprises a cooling fan 11. The first circuit unit 100 and the second circuit unit 200 include the condenser 122 and the second wind-liquid heat exchanger 220, respectively. The heat radiation fan 11 corresponds to at least one of the second wind-liquid heat exchanger 220 and the condenser 122. It is understood that the heat dissipation fan 11 may correspond to the second wind-liquid heat exchanger 220, such as the second fan 1102, or may correspond to the condenser 122, such as the first fan 1101, or may be located between the second wind-liquid heat exchanger 220 and the condenser 122, such as a third fan (not shown), so as to perform wind cooling heat dissipation on the second wind-liquid heat exchanger 220 and the condenser 122 simultaneously.

The cooling fan 11 enhances the cooling capability of the condenser 122 and/or the second wind-liquid heat exchanger 220 by forcing the air to flow, thereby helping to accelerate the discharge of heat, improving the condensing efficiency and the heat exchanging efficiency, and ensuring the normal operation of the refrigerating unit 120 and the second wind-liquid heat exchanger 220.

As an alternative embodiment, the energy storage cabinet 20 has a first operating state and a second operating state that are switched to each other;

The energy storage device 21, the power conversion device 22 and the thermal management device 10 are all operated when the energy storage cabinet 20 is in the first operating state, which normally corresponds to a normal energy storage and conversion operation, i.e. the energy storage cabinet 20 is in a charging and discharging process. The phase change heat storage unit 300 is not in communication with the first heat exchange pipe 110 and is in communication with the second heat exchange pipe 210, so that the temperature control of the first loop unit 100 on the energy storage device 21 is not affected, and meanwhile, the temperature of the power conversion device 22 can be balanced, so that when the phase change heat storage unit runs under high load or for a long time, the generated part of heat of the power conversion device 22 can be absorbed by the phase change material, the temperature of the power conversion device is prevented from rising continuously, the heat required to be diffused through the second loop unit 200 is reduced, the electric energy consumed by the cooling fan 11 is reduced, and the energy loss can be reduced on the basis of reliability through the temperature fluctuation control of the phase change material.

Here, the heat radiation fan 11 may be a first fan 1101 in the first circuit unit 100, a second fan 1102 in the second circuit unit 200, or a third fan that acts on both the first circuit unit 100 and the second circuit unit 200. Specific examples are described below.

When the energy storage cabinet 20 is in the second operating state, the energy storage device 21 and the power conversion device 22 are not operated, and the thermal management device 10 is operated, which state generally corresponds to standby or maintenance of the energy storage cabinet 20, i.e. the energy storage cabinet 20 is in an uncharged discharge process. The phase change heat storage unit 300 selectively circulates with the first heat exchange pipeline 110, and the selective circulation has certain flexibility, so that the energy storage cabinet 20 can perform temperature management under the condition of not affecting the main functions, and the energy storage cabinet 20 is ensured to be in an optimal temperature condition when the first working state is re-entered. The energy storage cabinet 20 can dynamically adjust the working state according to the actual requirement, so as to improve the energy efficiency and the response capability.

It can be appreciated that, in the process of heat absorption and release of the phase change portion 330, through selective circulation, the phase change portion 330 can delay release of the heat of the second heat exchange pipeline 210 to the first heat exchange pipeline 110 on one hand, and delay release of the heat of the second heat exchange pipeline 210 to the second wind-liquid heat exchanger 220 on the other hand.

In some embodiments, the energy storage cabinet 20 further includes a controller, and the controller is configured to obtain an operating state of the energy storage cabinet 20, and control the communication between the phase change heat storage unit 300 and the first heat exchange pipe 110 according to the operating state, so as to balance the temperatures of the first heat exchange pipe 110 and the second heat exchange pipe 210. It should be noted that, balancing the temperatures of the first heat exchange tube 110 and the second heat exchange tube 210 is actually balancing the temperatures of the cooling liquid in the channels of the first circuit unit 100 and the second circuit unit 200.

The controller can realize automatic thermal management adjustment, and the intelligent degree and the response speed of the energy storage cabinet 20 are improved. Through real-time monitoring and adjustment, the energy storage cabinet 20 can keep better performance and safety under different working conditions.

As an alternative embodiment, the phase change portion 330 has a threshold temperature, which refers to the critical point at which the phase change material transitions from one physical state (solid or liquid) to another. When the phase change portion 330 temperature approaches or reaches the threshold temperature, the phase change material begins to absorb or release heat, thereby stabilizing the temperature of the energy storage cabinet 20.

When the temperature of at least one of the first and second flow channels 310, 320 is higher than the threshold temperature, the phase change portion 330 changes from a solid state to a liquid state to absorb heat. In the case of an elevated temperature, the phase change material absorbs heat to perform a phase change (from solid to liquid), which helps to reduce the temperature in the flow path, effectively alleviating the overheating problem and protecting the energy storage device 21 and the power conversion device 22 from high temperatures.

When the temperature of at least one of the first and second flow channels 310, 320 is below the threshold temperature, the phase change portion 330 changes from a liquid state to a solid state to absorb heat. In the case of a temperature decrease, the phase change material releases heat to perform a phase change (from liquid to solid), which helps to raise the temperature in the flow path, and prevents the temperature from being too low, ensuring that the energy storage device 21 and the power conversion device 22 operate in a suitable temperature range.

It will be appreciated that the phase change material may be chosen as desired. In the embodiment of the application, the phase change material can be selected from materials with the threshold temperature of 20-50 ℃, such as paraffin, inorganic salt and the like. The embodiments of the present application are not limited thereto nor to the examples described above.

As an alternative embodiment, when the phase change thermal storage unit 300 includes the first flow path 310, the second flow path 320, and the phase change portion 330, the phase change portion 330 has a threshold temperature, the energy storage cabinet 20 further includes a temperature sensor electrically connected to the controller, and the temperature sensor is used to obtain the detected temperature.

The controller has a preset temperature lower than a threshold temperature for judging whether temperature adjustment is required.

The controller is configured to obtain the detected temperature provided by the temperature sensor, and control the communication relationship between the multi-way valve 400 and the first flow passage 310 according to the operating state, the detected temperature and the preset temperature, so as to balance the temperature of the first heat exchange pipe 110 and the temperature of the second heat exchange pipe 210.

Through the above arrangement, the controller can control the multi-way valve 400 according to the operating state, the detected temperature and the preset temperature, thereby realizing the temperature balance of the first heat exchange pipe 110 and the second heat exchange pipe 210. The intelligent control can improve the response speed and the response precision of the thermal management device 10, and ensure that the energy storage cabinet 20 can maintain a better thermal management state under different environmental conditions.

It will be appreciated that there is a further effect on the thermal management device 10 after balancing the temperature of the first heat exchange conduit 110 with the temperature of the second heat exchange conduit 210. The details are given below in different cases.

As an alternative embodiment, the state of the multi-way valve 400 is controlled to change the state of the phase change portion 330, achieving better energy-efficient thermal management control. The state of the control multi-way valve 400 means the communication relationship between the control multi-way valve 400 and the phase change heat storage unit 300.

The following is a detailed description of the various situations:

Referring to fig. 10 and 11, as an alternative embodiment, when the energy storage cabinet 20 is in the first operating state, i.e., the energy storage cabinet 20 is in the charging and discharging process. In the first operating state, both the energy storage device 21 and the power conversion device 22 are active, and energy is stored and converted. This process typically generates a significant amount of heat, requiring effective thermal management to maintain proper operation of the equipment to ensure continued operation of the energy storage cabinet 20 under high load conditions, avoiding performance degradation or equipment damage due to overheating.

In some embodiments, if the detected temperature is higher than a predetermined temperature, for example, the usage environment of the energy storage cabinet 20 is a summer high temperature.

The controller controls the multi-way valve 400 to make the first heat exchange pipeline 110 not communicated with the first flow channel 310 and the second flow channel 320 communicated with the second heat exchange pipeline 210, the temperature of the second flow channel 320 gradually rises until the temperature is greater than the threshold temperature, and besides the control of the temperature of the second heat exchange pipeline 210 by the second loop unit 200, the phase change part 330 also absorbs the heat of the second flow channel 320 until the temperature of the first heat exchange pipeline 110 is balanced with the temperature of the second heat exchange pipeline 210.

Through the arrangement, the phase change portion 330 also participates in heat management of the power conversion device 22, and the heat absorbing capability of the phase change material is utilized to relieve the influence of high temperature on the energy storage cabinet 20, so that the energy consumption of the second loop unit 200 is reduced.

It can be understood that the refrigerating unit 120 and the heater 130 are communicated in the first loop unit 100, so that the cooling liquid in the first heat exchange pipeline 110 can be adjusted to adjust the temperature of the energy storage device 21 in the first loop unit 100, and in summer, the refrigerating unit 120 mainly participates in working to reduce the temperature of the cooling liquid so as to reduce the temperature of the energy storage device 21.

When the temperature of the second flow channel 320 exceeds the threshold temperature of the phase change portion 330, the phase change material begins to absorb heat. The phase change material can effectively reduce the temperature of the second flow channel 320 during the heat absorption process until the temperature is balanced with the temperature of the first heat exchange tube 110. The heat absorbing capacity of the phase change material can relieve the heat load in the energy storage cabinet 20, and ensure the stable operation of the energy storage cabinet 20 in a high-temperature environment.

It should be noted that, after the phase change portion 330 absorbs the heat of the second flow channel 320, the temperature of the cooling liquid in the second flow channel 320 is inhibited from rising, so that the second fan 1102 does not need to maintain the operation with higher power, thereby reducing the energy consumption of the second fan 1102. That is, after balancing the temperature of the first heat exchange tube 110 and the temperature of the second heat exchange tube 210, the energy consumption of the second fan 1102 can be reduced, so as to reduce the overall energy consumption of the thermal management device 10.

Referring to fig. 10 and 11, in some embodiments, the usage scenario of the energy storage cabinet 20 is a winter low temperature if the detected temperature is lower than a preset temperature.

The controller controls the multi-way valve 400 such that the first heat exchanging pipe 110 is not communicated with the first flow passage 310 and the second flow passage 320 is communicated with the second heat exchanging pipe 210, the temperature of the second flow passage 320 is gradually reduced until it is less than the threshold temperature, and the phase change portion 330 releases heat into the second flow passage 320 until the temperature of the first heat exchanging pipe 110 is balanced with the temperature of the second heat exchanging pipe 210.

In a low temperature environment, the detected temperature may cause the internal temperature of the energy storage cabinet 20 to be too low, which affects the normal operation and performance of the energy storage device 21 and the power conversion device 22.

The non-communication between the first heat exchange tube 110 and the first flow channel 310 can ensure that the cooling liquid of the first heat exchange tube 110 does not directly pass through the phase change portion 330, so as to avoid excessive heat loss when not needed.

With the above arrangement, the energy storage cabinet 20 can handle the heat management of the power conversion device 22, and the temperature is regulated by utilizing the heat release capability of the phase change material.

When the temperature of the second flow path 320 gradually decreases and is less than the threshold temperature of the phase change portion 330, the phase change material starts to release heat. The phase change material is effective to raise the temperature of the second flow path 320 during the heat release process until it is in equilibrium with the temperature of the first heat exchange tube 110. The heat release capability of the phase change material can ensure the stability of the temperature inside the energy storage cabinet 20 and prevent the influence of the too low temperature on the performance of the equipment.

That is, after the temperature of the first heat exchange pipe 110 and the temperature of the second heat exchange pipe 210 are balanced, the temperature of the coolant in the second flow path 320 can be suppressed from decreasing, and the heat balance of the heat management device 10 can be maintained, thereby realizing the heat preservation of the power conversion device 22.

Referring to fig. 10 and 11, as an alternative embodiment, when the energy storage cabinet 20 is in the second operation state, i.e., the energy storage cabinet 20 is in an uncharged process, the energy storage device 21 and the power conversion device 22 do not perform the energy conversion operation, and may be in a standby or maintenance state. The thermal management device 10 is mainly used for maintaining a safe temperature range of the energy storage cabinet 20 and reducing the influence of the detected temperature on the energy storage cabinet 20.

The controller controls the multi-way valve 400 such that the first heat exchanging pipe 110 is not communicated with the first flow passage 310 and the second flow passage 320 is communicated with the second heat exchanging pipe 210, the temperature of the second flow passage 320 is gradually increased until it is greater than the threshold temperature, and the phase change portion 330 absorbs the heat of the second flow passage 320 until the temperature of the first heat exchanging pipe 110 is balanced with the temperature of the second heat exchanging pipe 210.

It should be noted that, in the present application, the temperature balance between the first heat exchange tube 110 and the second heat exchange tube 210 further refers to the temperature balance of the cooling liquid flowing through the two heat exchange tubes, that is, the temperature balance of the cooling liquid in the first circuit unit 100 and the second circuit unit 200.

With the above arrangement, the phase change portion 330 can handle heat management of the power conversion device 22, and the heat absorbing capability of the phase change material is utilized to mitigate the influence of high temperature on the energy storage cabinet 20.

It will be appreciated that the refrigerating unit 120 and the heater 130 are connected to the first circuit unit 100, and the cooling liquid in the first heat exchange pipe 110 may be adjusted to adjust the temperature of the energy storage device 21 in the first circuit unit 100.

Referring to fig. 12 and 13, in some embodiments, the usage scenario of the energy storage cabinet 20 is a winter low temperature if the detected temperature is lower than a preset temperature.

The controller controls the multi-way valve 400 to enable the first heat exchange pipeline 110 to be communicated with the first flow channel 310 and the second flow channel 320 to be communicated with the second heat exchange pipeline 210, the temperatures of the first flow channel 310 and the second flow channel 320 are gradually reduced until the temperature of the first flow channel 310 is smaller than a threshold temperature, and the phase change part 330 releases heat to enter the first flow channel 310 until the temperatures of the first heat exchange pipeline 110 and the second heat exchange pipeline 210 are balanced.

It will be appreciated that the phase change portion 330 is restored to a state capable of absorbing heat after releasing heat, so that the power conversion device 22 can absorb heat when it operates next time, thereby reciprocating.

The first heat exchange pipeline 110 is communicated with the first flow channel 310, so that the cooling liquid of the first heat exchange pipeline 110 can exchange heat through the phase change part 330, and the temperature of the energy storage device 21 is directly affected. At this time, the cooling liquid of the second heat exchange pipe 210 exchanges heat through the phase change portion 330. In this way, the phase change portion 330 suppresses the cooling liquid temperature of the first flow passage 310 from continuing to decrease, thereby achieving heat preservation of the energy storage device 21.

That is, after the temperature of the first heat exchange pipe 110 and the temperature of the second heat exchange pipe 210 are balanced, the temperature of the cooling liquid in the first flow channel 310 can be restrained from decreasing, and the heat balance of the heat management device 10 is maintained, so that the heat preservation of the energy storage device 21 is realized.

During the process of changing from the first working state to the second working state, the heat absorbed by the phase change portion 330 in the first working state can be released, and the heat can enter the first heat exchange pipeline 110 and the second heat exchange pipeline 210 through the first flow channel 310 and the second flow channel 320 respectively. In this way, the phase change part 330 delays the release of the heat of the second heat exchange pipe 210 to the first heat exchange pipe 110 and delays the release of the heat of the second heat exchange pipe 210 to the second wind-liquid heat exchanger 220.

In this way, the heater 130 in the first loop unit 100 does not need to maintain operation with a larger power, so that the power consumption of the heater 130 can be reduced, and the overall power consumption of the energy storage cabinet 20 can be further reduced.

When the temperature of the first runner 310 is less than the threshold temperature, the phase change material begins to release stored heat into the first runner 310, helping to raise the runner temperature. The heat release capability of the phase change material can ensure the stability of the temperature inside the energy storage cabinet 20 and prevent the influence of the too low temperature on the performance of the equipment.

In this process, the heat release process of the phase change portion 330 is continued until the temperatures of the two heat exchange pipes reach equilibrium. Through the thermal conditioning effect of the phase change material, the energy storage cabinet 20 can effectively maintain the internal temperature balance in a low-temperature environment, and the energy storage device 21 and the power conversion device 22 are ensured not to be damaged in the low-temperature environment.

It is understood that the multi-way valve 400 between the first flow passage 310 and the first heat exchange tube 110 can have a variety of configurations, and can be selectively circulated. The following examples are given:

Referring to fig. 11 and 13, as an alternative embodiment, the multi-way valve 400 is a three-way valve 410, and the three-way valve 410 has a first valve port 411, a second valve port 412, and a third valve port 413 that communicate with each other.

The first valve port 411 is communicated with an input end of the first heat exchange pipeline 110 and is used for receiving the cooling liquid from the first heat exchange pipeline 110. The second valve port 412 communicates with the output of the first heat exchange conduit 110 for returning the cooling fluid to the first heat exchange conduit 110. The third valve port 413 communicates with the input end of the first flow passage 310 for introducing the cooling liquid into the first flow passage 310.

The three-way valve 410 can flexibly control the flow direction of the cooling liquid, and can be switched under different conditions, so that the heat management is optimized.

The first circuit unit 100 further comprises a first auxiliary conduit 140 communicating with the first heat exchange conduit 110, one end of the first auxiliary conduit 140 communicating with the output end of the first flow channel 310 for receiving the cooling liquid from the first flow channel 310. The other end is in communication with the output end of the first heat exchange conduit 110 for returning the cooling fluid to the first heat exchange conduit 110.

The first auxiliary pipe 140 may provide an additional flow path for the cooling liquid to enhance the flexibility and efficiency of the heat management, and the cooling liquid in the above-mentioned heat management apparatus 10 is directly returned to the heat exchange pipe after passing through the phase change portion 330, thereby optimizing the heat exchange process.

Through the combination of the three-way valve 410 and the auxiliary pipeline, the energy storage cabinet 20 can flexibly adjust the flow path of the cooling liquid under different temperature conditions and working states, and the adaptability and the response speed of the energy storage cabinet 20 can be improved. The cooling liquid can circulate between different structures, so that the phase change material can effectively absorb or release heat, and the optimal temperature of energy storage is maintained. By optimizing the flow path of the cooling liquid, unnecessary heat loss and energy consumption are reduced, and the efficiency of the whole liquid cooling system is improved.

As can be seen from the foregoing, when the energy storage cabinet 20 is in the first working state, or when the energy storage cabinet 20 is in the second working state and the detected temperature is higher than the preset temperature, the first flow channel 310 is not communicated with the first heat exchange pipeline 110. Thus, under the control of the controller, the three-way valve 410 may place the first flow passage 310 out of communication with the first heat exchange conduit 110 by closing the third valve port 413 and opening the first and second valve ports 411 and 412.

When the energy storage cabinet 20 is in the second working state and the detected temperature is lower than the preset temperature, the first flow channel 310 is communicated with the first heat exchange pipeline 110. Thus, under the control of the controller, the three-way valve 410 may communicate the first flow passage 310 with the first heat exchange conduit 110 by closing the first valve port 411 and opening the second valve port 412 and the third valve port 413.

By controlling the opening and closing of the different ports of the three-way valve 410, the energy storage cabinet 20 can flexibly adjust the flow path of the cooling liquid according to actual needs, and ensure temperature management under different working states and environmental conditions. The method can ensure that the energy storage cabinet 20 can keep running under different conditions, and prevent the influence of overheat or supercooling on the performance of the energy storage cabinet 20.

Referring to fig. 14 and 15, as an alternative embodiment, the multi-way valve 400 is a four-way valve 420, and the four-way valve 420 has a fourth port 421, a fifth port 422, a sixth port 423, and a seventh port 424 that communicate with each other.

The fourth valve port 421 is connected to the input end of the first heat exchange tube 110, and is configured to receive the cooling liquid from the first heat exchange tube 110. The fifth valve port 422 communicates with the output of the first heat exchange conduit 110 for returning the cooling fluid to the first heat exchange conduit 110. The sixth valve port 423 communicates with an input end of the first flow passage 310 for introducing the cooling liquid into the first flow passage 310. The seventh valve port 424 may provide an additional flow path.

The four-way valve 420 may provide more complex fluid path control, enabling switching under different conditions, thereby optimizing thermal management.

The first circuit unit 100 further includes a first wind-liquid heat exchanger 180, a second auxiliary duct 150, and a third auxiliary duct 160, the first wind-liquid heat exchanger 180 being in communication with the first heat exchange duct 110, the first wind-liquid heat exchanger 180 being for assisting in temperature management of the cooling liquid by air flow.

The introduction of the first wind-liquid heat exchanger 180 can provide an additional cooling means, when the detected temperature is low, the heat dissipation requirement of the energy storage device 21 is reduced, and the loop where the first wind-liquid heat exchanger 180 is located can be utilized to dissipate heat for the energy storage device 21, so that the refrigeration part 120 including the compressor 121 does not need to be started, thereby being beneficial to reducing energy consumption. Accordingly, the cooling efficiency and flexibility of the energy storage cabinet 20 can be improved.

One end of the second auxiliary pipe 150 is connected to the output end of the first flow passage 310, and the other end is connected to the input end of the first heat exchange pipe 110. The second auxiliary pipe 150 can make the cooling liquid directly return to the heat exchanging pipe after passing through the phase change portion 330, and can optimize the heat exchanging process and increase the response speed of the energy storage cabinet 20.

One end of the third auxiliary conduit 160 communicates with the seventh valve port 424 and the other end communicates with the input of the first heat exchange conduit 110. The third auxiliary conduit 160 may provide an additional flow path, allowing flexible tuning of the loop unit under certain conditions (e.g., when additional cooling or heat release is required), which may improve the flexibility of the energy storage cabinet 20.

It will be appreciated that when the first circuit unit 100 includes the first pump 170 and the first wind-liquid heat exchanger 180, the fourth valve port 421 communicates with the first pump 170 through the first wind-liquid heat exchanger 180, and both ends of the third auxiliary pipe 160 communicate with the seventh valve port 424 of the four-way valve 420 and the first pump 170, respectively.

Note that, the energy consumption between the first wind-liquid heat exchanger 180 and the refrigeration unit 120 having the compressor 121 is different, the refrigeration unit 120 is relatively power-consuming, and the first circuit unit 100 incorporating the first wind-liquid heat exchanger 180 is relatively energy-saving. Therefore, when the first cooling pipe 110 is communicated with the first wind-liquid heat exchanger 180 through the four-way valve 420, if the first circuit unit 100 can meet the heat dissipation requirement of the energy storage device 21, the compressor 121 does not need to be started.

Through the combination of the four-way valve 420 and the plurality of auxiliary pipelines, the energy storage cabinet 20 can flexibly adjust the flow path of the cooling liquid to select different loops to radiate heat of the energy storage device 21 under different temperature conditions and working states, and the flexibility can improve the energy consumption of the thermal management device 10.

The configuration of the four-way valve 420 and auxiliary piping enables coolant to circulate between the various components, ensuring that the phase change material can efficiently absorb or release heat, thereby maintaining the temperature balance of the energy storage cabinet 20. By optimizing the flow path of the cooling liquid and introducing the first wind-liquid heat exchanger 180, unnecessary heat loss and energy consumption can be reduced.

Referring to fig. 15, as an alternative embodiment, when the energy storage cabinet 20 is in the first operating state, or when the energy storage cabinet 20 is in the second operating state and the detected temperature is higher than the preset temperature,

The controller controls the four-way valve 420 to close the fourth port 421 and the sixth port 423 and open the fifth port 422 and the seventh port 424, or controls the four-way valve 420 to close the seventh port 424 and the sixth port 423 and open the fifth port 422 and the fourth port 421.

When the energy storage cabinet 20 is in the second operating state and the detected temperature is lower than the preset temperature,

The controller controls the four-way valve 420 to close the fifth valve port 422 and the seventh valve port 424 and open the fourth valve port 421 and the sixth valve port 423, or the controller may control the four-way valve 420 to close the fourth valve port 421 and the seventh valve port 424 and open the fifth valve port 422 and the sixth valve port 423;

As can be seen from the foregoing, when the energy storage cabinet 20 is in the first working state, or when the energy storage cabinet 20 is in the second working state and the detected temperature is higher than the preset temperature, the first flow channel 310 is not communicated with the first heat exchange pipeline 110. Thus, under the control of the controller, the four-way valve 420 may place the first flow passage 310 out of communication with the first heat exchange conduit 110 by closing the fourth and sixth ports 421 and 423 and opening the fifth and seventh ports 422 and 424, or closing the seventh and sixth ports 424 and 423 and opening the fifth and fourth ports 422 and 421.

When the energy storage cabinet 20 is in the second working state and the detected temperature is lower than the preset temperature, the first flow channel 310 is communicated with the first heat exchange pipeline 110. Thus, under the control of the controller, the four-way valve 420 may open the fourth port 421 and the sixth port 423 by closing the fifth port 422 and the seventh port 424. Or closing the fourth port 421, the seventh port 424 and opening the fifth port 422, the sixth port 423 may allow the first flow passage 310 to communicate with the first heat exchange conduit 110.

By controlling the opening and closing of the different ports of the four-way valve 420, the energy storage cabinet 20 can flexibly adjust the flow path of the cooling liquid according to actual needs, and ensure temperature management under different working states and environmental conditions. The method can ensure that the energy storage cabinet 20 can keep running under different conditions, and prevent the influence of overheat or supercooling on the performance of the energy storage cabinet 20.

When the first heat exchanging pipe 110 is connected to the first air-liquid heat exchanger 180, the cooling liquid may exchange heat directly with the external environment through the first air-liquid heat exchanger 180. This direct heat exchange can avoid unnecessary energy consumption because the refrigeration unit 120 does not need to be started for compression refrigeration.

By directly utilizing a low temperature environment for cooling, the energy storage cabinet 20 can reduce energy consumption and improve overall energy efficiency, especially in winter or low temperature conditions.

The terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used for convenience in describing and simplifying the description of the present application based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. In the description of the present application, the meaning of "a plurality" is two or more, unless specified otherwise precisely.

The terms first, second, third, fourth and the like in the description and in the claims and in the above drawings are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that such data may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be noted that the above embodiments are merely for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or equivalent substitutions may be made for some or all of the technical features of the device, and these modifications or substitutions do not deviate from the essence of the corresponding technical solution from the scope of the technical solution of the embodiment of the present application.

Claims

1. A thermal management device, characterized in that it is used for an energy storage cabinet (20), the thermal management device (10) comprising a first circuit unit (100), a second circuit unit (200), a multi-way valve (400) and a phase change heat storage unit (300);

Cooling liquid flows through both the first circuit unit (100) and the second circuit unit (200);

The first circuit unit (100) comprises a first heat exchange pipe (110), and the coolant of the first circuit unit (100) is used to exchange heat with the energy storage device (21) of the energy storage cabinet (20);

The second circuit unit (200) comprises a second heat exchange pipe (210), and the coolant of the second circuit unit (200) is used to exchange heat with the power conversion device (22) of the energy storage cabinet (20);

The phase-change heat storage unit (300) comprises a first flow channel (310), a second flow channel (320) and a phase change portion (330); the first flow channel (310) can be selectively connected to the first heat exchange pipe (110) through the multi-way valve (400); and the second flow channel (320) is connected to the second heat exchange pipe (210);

The phase change portion (330) is in thermal contact with the first flow channel (310) and the second flow channel (320).

2. The thermal management device according to claim 1, characterized in that the first flow channel (310) comprises a plurality of first flow sections (311) connected end to end in sequence, and the extension directions of some of the first flow sections (311) intersect;

The second flow channel (320) has a plurality of second flow sections (321) connected end to end in sequence, and the extension directions of some of the second flow sections (321) intersect;

The phase change portion (330) is located between at least a portion of the first flow sections (311) and the corresponding second flow sections (321);

Any of the first circulation sections (311) and the corresponding second circulation section (321) are arranged in parallel.

3. The thermal management device according to claim 1, characterized in that the phase change heat storage unit (300) comprises a shell (340), and the first flow channel (310), the second flow channel (320) and the phase change part (330) are all located in the shell (340); wherein,

The phase-change heat storage unit (300) comprises a first cavity (301), a second cavity (302) and a phase-change cavity (303); the first cavity (301) is connected to the first flow channel (310); the second cavity (302) is connected to the second flow channel (320); and the phase-change portion (330) is located in the phase-change cavity (303);

The phase change cavity (303) is closely attached to at least one of the first cavity (301) and the second cavity (302).

4. The thermal management device according to claim 3, characterized in that the number of the first cavity (301), the second cavity (302) and the phase change cavity (303) is multiple, and the multiple first cavities (301) and the second cavities (302) are arranged alternately in sequence;

The shell (340) comprises a plurality of partitions (341) and a plurality of sealing rings (342), wherein the plurality of partitions (341) and the plurality of sealing rings (342) are arranged alternately in sequence, and two adjacent partitions (341) and the corresponding sealing rings (342) are jointly arranged to form the first cavity (301), the second cavity (302) and the phase change cavity (303);

A first top flow opening (343) and a second top flow opening (344) are respectively provided on the left and right sides of the top of the partition (341), and a first bottom flow opening (345) and a second bottom flow opening (346) are respectively provided on the left and right sides of the bottom of the partition (341);

The first flow channel (310) is staggeredly connected to the first top flow opening (343) and the second bottom flow opening (346) to connect to the first cavity (301);

The second flow channel (320) is alternately connected to the second top flow opening (344) and the first bottom flow opening (345) to connect to the second cavity (302).

5. The thermal management device according to claim 3, characterized in that the housing (340) comprises an aluminum extruded shell, the aluminum extruded shell has a plurality of the phase change cavities (303), and the plurality of the phase change cavities (303) are arranged in an array in the aluminum extruded shell.

The plurality of phase change cavities (303) are respectively located on both sides of the first cavity (301) and the second cavity (302).

6. The thermal management device according to claim 3, characterized in that the first flow channel (310) and the second flow channel (320) are arranged in the shell (340) at intervals, and the phase change portion (330) covers the outer periphery of the first flow channel (310) and the second flow channel (320);

The housing (340) comprises a cylindrical shell, the first flow channel (310) and the second flow channel (320) are both in a coil shape, and the phase change portion (330) is filled in the cylindrical shell;

or,

The housing (340) comprises a rectangular shell, the first flow channel (310) and the second flow channel (320) are both serpentine tubes with multiple bends, and the phase change portion (330) is filled in the rectangular shell.

7. The thermal management device according to claim 5 or 6, characterized in that the phase change thermal storage unit (300) further comprises an upper cover (350), the upper cover (350) being provided with at least a first opening (351), a second opening (352), a third opening (353) and a fourth opening (354), the first opening (351) being adjacent to the third opening (353), the second opening (352) being adjacent to the fourth opening (354), and the first opening (351) and the second opening (352) being located on opposite sides of the upper cover (350);

Two ends of the first flow channel (310) are respectively connected to the first opening (351) and the second opening (352), and two ends of the second flow channel (320) are respectively connected to the third opening (353) and the fourth opening (354);

or,

The two ends of the first flow channel (310) are respectively connected to the first opening (351) and the third opening (353), and the two ends of the second flow channel (320) are respectively connected to the second opening (352) and the fourth opening (354).

8. The thermal management device according to any one of claims 1 to 6, characterized in that the first circuit unit (100) further comprises a refrigeration unit (120), a heater (130), a first pump (170) and a first air-to-liquid heat exchanger (180), wherein the first pump (170) and the first air-to-liquid heat exchanger (180) are both connected to the first heat exchange pipe (110); the refrigeration unit (120) is used to cool the coolant flowing through the first heat exchange pipe (110), and the heater (130) is used to heat the coolant flowing through the first heat exchange pipe (110);

The refrigeration unit (120) comprises a condenser (122), a compressor (121), a plate exchanger (123) and a throttle valve; the refrigeration unit (120) cools the cooling liquid flowing in the first heat exchange pipe (110) through the plate exchanger (123);

The second circuit unit (200) further comprises a second air-liquid heat exchanger (220) and a second pump (230), and the second air-liquid heat exchanger (220) and the second pump (230) are both connected to the second heat exchange pipeline (210).

9. The thermal management device according to claim 8, characterized in that the first circuit unit (100) further comprises a third auxiliary pipeline (160);

The multi-way valve (400) is a four-way valve (420); the fourth valve port (421) of the four-way valve (420) is connected to the first pump (170) via the first air-liquid heat exchanger (180); the fifth valve port (422) of the four-way valve (420) is connected to the first heat exchange pipe (110); the sixth valve port (423) of the four-way valve (420) is connected to the first flow channel (310); and the two ends of the third auxiliary pipe (160) are respectively connected to the seventh valve port (424) of the four-way valve (420) and the first pump (170).

10. An energy storage cabinet, characterized in that it comprises an energy storage device (21), a power conversion device (22) and a thermal management device (10) according to any one of claims 1 to 9,

The heat exchange structure of the energy storage device (21) is in communication with the first heat exchange pipe (110) of the thermal management device (10), and the heat exchange structure of the power conversion device (22) is in communication with the second heat exchange pipe (210) of the thermal management device (10).

11. The energy storage cabinet according to claim 10, characterized in that the phase change portion (330) of the thermal management device (10) has a threshold temperature;

The energy storage cabinet (20) further comprises a controller and a temperature sensor electrically connected to the controller, wherein the temperature sensor is used to obtain a detection temperature;

The controller has a preset temperature lower than the threshold temperature, and is configured to obtain a detection temperature provided by the temperature sensor, and control the communication relationship between the multi-way valve (400) and the first flow channel (310) according to the working state of the energy storage cabinet (20), the detection temperature and the preset temperature of the controller, so as to delay the release of heat from the second heat exchange pipe (210) to the first heat exchange pipe (110) and the second air-to-liquid heat exchanger (220).