Integrated barrel pump thermal management system and energy storage device

Abstract

The utility model relates to integrated barrel pump heat management system technical field, especially integrated barrel pump heat management system and energy storage equipment of a kind of. The integrated barrel pump heat management system includes low-pressure circulating barrel, liquid pump and energy storage device, and heat exchange assembly for heat exchange with energy storage element is equipped in energy storage device, and low-pressure circulating barrel is filled with refrigerant. The inlet of liquid pump is communicated with the liquid outlet of low-pressure circulating barrel, the outlet of liquid pump is communicated with the inlet of heat exchange assembly, the outlet of heat exchange assembly is communicated with the liquid inlet of low-pressure circulating barrel, and self-circulation loop is formed. In the compressor stop operating state, liquid pump can be started and drive the refrigerant in low-pressure circulating barrel to flow to heat exchange assembly along self-circulation loop. The integrated barrel pump heat management system does not need to start compressor, and heating or cooling of battery module is realized through self-circulation mode, reduce system energy consumption, save cost.

Description

Technical Field

[0001] This utility model relates to the field of thermal management system technology, and in particular to an integrated barrel pump thermal management system and energy storage device. Background Technology

[0002] With the rapid development of new energy storage and power battery industries, the operating temperature of battery modules directly affects their safety, charge and discharge efficiency, and cycle life. Therefore, efficient and precise battery thermal management technology has become one of the core requirements of the industry. Among them, refrigerant direct cooling thermal management technology has significant advantages in heat exchange efficiency and system simplification because it can directly introduce refrigerant into the battery cold plate for heat exchange with the battery. It has been widely used in various battery thermal management scenarios.

[0003] However, existing thermal management systems require continuous compressor operation to provide cooling or heating when heating or cooling battery modules. This consumes a significant amount of additional electrical energy, increasing system energy consumption. Furthermore, some residual cooling energy remains in the system after the compressor stops operating, which current thermal management systems cannot utilize, leading to energy waste and increased costs.

[0004] Therefore, there is an urgent need to design an integrated barrel pump thermal management system and energy storage equipment to solve the above technical problems. Utility Model Content

[0005] The purpose of this invention is to propose an integrated barrel pump thermal management system and energy storage device that can heat or cool the battery module through a self-circulation mode without starting the compressor, thereby reducing system energy consumption and saving costs.

[0006] The integrated tank pump thermal management system and energy storage equipment offer diverse heating modes, allowing for switching between different heating modes based on varying operating conditions. This reduces the compressor's operating burden and energy consumption, enhances flexibility and adaptability, and saves costs.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] On the one hand, this utility model provides an integrated tank pump thermal management system, including a low-pressure circulating tank, a liquid pump and an energy storage device. The energy storage device is equipped with a heat exchange component for exchanging heat with the energy storage element, and the low-pressure circulating tank contains refrigerant.

[0009] The inlet of the liquid pump is connected to the outlet of the low-pressure circulation tank, the outlet of the liquid pump is connected to the inlet of the heat exchange component, and the outlet of the heat exchange component is connected to the inlet of the low-pressure circulation tank, forming a self-circulating loop.

[0010] When the compressor is not running, the liquid pump can start and drive the refrigerant in the low-pressure circulation tank to flow along the self-circulation loop to the heat exchange assembly.

[0011] As an optional technical solution for an integrated tank pump thermal management system, the integrated tank pump thermal management system further includes a third check valve, which is disposed between the outlet of the liquid pump and the inlet of the heat exchange component, and the conduction direction of the third check valve is consistent with the flow direction of the refrigerant in the self-circulation loop.

[0012] As an optional technical solution for an integrated tank pump heat management system, the integrated tank pump heat management system further includes a fifth solenoid valve and a fifth check valve, both of which are disposed between the heat exchange component and the low-pressure circulation tank; the fifth solenoid valve is used to control the on / off state of the self-circulation loop, and the conduction direction of the fifth check valve is consistent with the flow direction of the refrigerant in the self-circulation loop.

[0013] As an optional technical solution for an integrated tank pump thermal management system, the integrated tank pump thermal management system further includes a first filter, which is disposed between the inlet of the liquid pump and the outlet of the low-pressure circulating tank.

[0014] As an optional technical solution for an integrated tank pump thermal management system, the integrated tank pump thermal management system further includes a refrigerant heater, which is installed in the low-pressure circulating tank or in the self-circulating loop, and is configured to preheat the refrigerant when the ambient temperature is lower than a preset value.

[0015] As an optional technical solution for an integrated barrel pump thermal management system, the refrigerant heater is an electric heating rod or a PTC heating element.

[0016] As an optional technical solution for an integrated tank pump thermal management system, the integrated tank pump thermal management system further includes an oil return path and a third filter. One end of the oil return path is connected to the low-pressure circulating tank, and the other end of the oil return path is connected to the oil separator. The third filter is installed on the oil return path.

[0017] As an optional technical solution for an integrated barrel pump thermal management system, an ejector and an ejector solenoid valve are also provided on the return oil line. The ejector is used to enhance the return oil power, and the ejector solenoid valve is used to control the opening and closing of the return oil line.

[0018] As an optional technical solution for an integrated tank pump thermal management system, the integrated tank pump thermal management system further includes a controller, which is signal-connected to the liquid pump; the controller is configured to start the liquid pump and enter a self-circulation mode after the compressor stops and the temperature of the energy storage element is greater than a preset threshold.

[0019] On the other hand, this utility model provides an energy storage device, which includes an energy storage unit and the integrated tank pump thermal management system described above; the energy storage unit includes a plurality of battery modules and a battery cold plate wrapped around the outside of the battery modules; the battery cold plate is the heat exchange component, the inlet of the battery cold plate is connected to the outlet of the liquid pump, and the outlet of the battery cold plate is connected to the liquid inlet of the low-pressure circulation tank.

[0020] The beneficial effects of this utility model include at least the following:

[0021] This invention provides an integrated tank pump thermal management system, which includes a low-pressure circulation tank, a liquid pump, and an energy storage device. The energy storage device contains a heat exchange component for heat exchange with the energy storage element. The low-pressure circulation tank contains refrigerant. The inlet of the liquid pump is connected to the outlet of the low-pressure circulation tank, the outlet of the liquid pump is connected to the inlet of the heat exchange component, and the outlet of the heat exchange component is connected to the inlet of the low-pressure circulation tank, forming a self-circulating loop. When the compressor is not running, the liquid pump can start and drive the refrigerant in the low-pressure circulation tank to flow along the self-circulating loop to the heat exchange component.

[0022] As described above, the liquid pump can start even when the compressor is stopped. When the liquid pump operates, it exerts force on the refrigerant in the low-pressure circulation tank, causing it to flow along the self-circulating loop to the heat exchange components. Typically, the liquid pump has a relatively small head and flow rate, therefore it does not consume as much energy as the compressor when driving the refrigerant flow, thus reducing system energy consumption. This allows the integrated tank pump thermal management system to achieve heat exchange with the energy storage components without starting the compressor, further reducing system energy consumption. Simultaneously, the low-temperature refrigerant exchanges heat with the energy storage components (such as battery modules) in the heat exchange components, absorbing heat from the energy storage components while fully releasing its own residual cooling capacity. This avoids the problem of idle residual low-temperature refrigerant cooling capacity in the system after the compressor stops, achieving secondary energy utilization and cost savings.

[0023] This utility model also provides an energy storage device with multiple operating modes, which can significantly reduce operating energy consumption, improve energy utilization efficiency, and thus reduce the operating cost of the energy storage device. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the integrated tank pump heat management system provided in an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the integrated barrel pump heat management system provided in this embodiment of the utility model in the compressor-transported refrigerant heating mode;

[0027] Figure 3 This is a schematic diagram of the integrated tank pump thermal management system provided in this embodiment of the present invention in the liquid pump transport refrigerant heating mode;

[0028] Figure 4 This is a schematic diagram of the integrated tank pump heat management system provided in this embodiment of the utility model in self-circulation mode;

[0029] Figure 5 This is a schematic diagram of the integrated tank pump heat management system provided in this embodiment of the utility model in forced cooling mode;

[0030] Figure 6 This is a schematic diagram of the integrated tank pump thermal management system provided in this embodiment of the utility model in natural cooling mode;

[0031] Figure 7 This is a schematic diagram of the integrated barrel pump thermal management system (without ejector and ejector solenoid valve) provided in this embodiment of the utility model;

[0032] Figure 8 This is a schematic diagram of the integrated tank pump thermal management system (the refrigerant heater is located outside the low-pressure circulating tank) provided in this embodiment of the utility model.

[0033] Figure Labels

[0034] 100. Energy storage devices;

[0035] 1. Compressor; 2. Oil separator; 3. Throttling valve; 4. Low-pressure circulation tank; 5. Liquid pump; 6. Condenser; 7. Refrigerant heater; 8. First filter; 9. Second filter; 10. Third filter;

[0036] 11. First check valve; 12. Second check valve; 13. Third check valve; 14. Fourth check valve; 15. Fifth check valve; 16. First solenoid valve; 17. Second solenoid valve; 18. Third solenoid valve; 19. Fourth solenoid valve; 20. Fifth solenoid valve; 21. Return oil line; 22. Ejector; 23. Ejector solenoid valve. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0044] This embodiment provides an integrated barrel pump thermal management system that eliminates the need to start the compressor. It achieves heating or cooling of the battery module through a self-circulation mode, reducing system energy consumption and saving costs.

[0045] like Figures 1-4 As shown, the integrated tank pump thermal management system mainly includes a low-pressure circulating tank 4, a liquid pump 5, and an energy storage device 100. The energy storage device 100 is equipped with a heat exchange component for exchanging heat with the energy storage element. The low-pressure circulating tank 4 contains refrigerant. The inlet of the liquid pump 5 is connected to the outlet of the low-pressure circulating tank 4, the outlet of the liquid pump 5 is connected to the inlet of the heat exchange component, and the outlet of the heat exchange component is connected to the inlet of the low-pressure circulating tank 4, forming a self-circulating loop. When the compressor 1 is not running, the liquid pump 5 can start and drive the refrigerant in the low-pressure circulating tank 4 to flow along the self-circulating loop to the heat exchange component.

[0046] Based on the above design, the liquid pump 5 can start even when the compressor 1 is stopped. When the liquid pump 5 is working, it exerts a force on the refrigerant in the low-pressure circulation tank 4, causing it to flow along the self-circulation loop to the heat exchange components. Typically, the head and flow rate of the liquid pump 5 are relatively small, therefore it does not consume as much energy as the compressor 1 when driving the refrigerant flow, thus reducing system energy consumption. This integrated tank pump thermal management system can achieve heat exchange with the energy storage components without starting the compressor 1, reducing system energy consumption. Simultaneously, the low-temperature refrigerant exchanges heat with the energy storage components (such as battery modules) in the heat exchange components, absorbing heat from the energy storage components while fully releasing its own residual cooling capacity. This avoids the problem of idle residual low-temperature refrigerant cooling capacity in the system after the compressor 1 stops, achieving secondary energy utilization and cost savings.

[0047] The integrated barrel pump thermal management system in this embodiment also includes a controller and a temperature sensor (not shown in the figure). The temperature sensor is installed on the energy storage element to measure the temperature of the energy storage element. The controller is signal-connected to both the liquid pump 5 and the temperature sensor; the controller is configured to start the liquid pump 5 and enter self-circulation mode after the compressor 1 stops and the temperature of the energy storage element is greater than a preset threshold.

[0048] The controller can monitor the temperature of the energy storage element in real time. If the temperature of the energy storage element is still higher than the preset threshold after the compressor 1 stops, it means that the energy storage element is still generating heat and needs to be dissipated. At this time, the controller automatically starts the liquid pump 5 and enters the self-circulation mode based on this temperature condition.

[0049] Through intelligent control, this integrated tank pump thermal management system automatically adjusts its operating mode based on the actual temperature of the energy storage components. This automated control method not only improves the system's operating efficiency and reduces manual intervention, but also enables timely and effective thermal management of the energy storage components, preventing excessively high temperatures from affecting their performance and lifespan, thus improving safety.

[0050] For example, the controller can be set to a commercially available PLC controller.

[0051] like Figures 1-4 As shown, the integrated tank pump thermal management system also includes a compressor 1, an oil separator 2, and a throttling valve 3. The integrated tank pump thermal management system has a compressor-driven refrigerant heating mode. The exhaust port of the compressor 1 is connected to the inlet of the oil separator 2. The first outlet of the oil separator 2 is connected to the heat exchange component in the energy storage device 100, and the second outlet of the oil separator 2 is connected to the suction port of the compressor 1. One end of the throttling valve 3 is connected to the heat exchange component, and the other end is connected to the liquid inlet of the low-pressure circulation tank 4. The outlet of the low-pressure circulation tank 4 is connected to the suction port of the compressor 1. The integrated tank pump thermal management system also has a liquid pump-driven refrigerant heating mode and a self-circulation mode. The inlet of the liquid pump 5 is connected to the liquid outlet of the low-pressure circulation tank 4, and the outlet of the liquid pump 5 is sequentially connected to the heat exchange component in the energy storage device 100 and the liquid inlet of the low-pressure circulation tank 4. The low-pressure circulation tank 4 contains refrigerant.

[0052] Based on the above design, the integrated tank pump thermal management system in this embodiment has multiple heating modes, such as compressor-driven refrigerant heating mode and liquid pump-driven refrigerant heating mode, and also has a self-circulation mode.

[0053] Specifically, in the compressor-driven refrigerant heating mode, compressor 1 starts and draws low-pressure gaseous refrigerant from the outlet of low-pressure circulation tank 4. This low-pressure gaseous refrigerant is compressed into a high-temperature, high-pressure gaseous state and then sent to oil separator 2. Oil separator 2 separates the refrigerant oil and returns it to the suction port of compressor 1. The high-temperature, high-pressure gaseous refrigerant is then transported through the first outlet of oil separator 2 to the heat exchange components of energy storage device 100 (such as battery cold plates). After releasing heat to the energy storage elements (such as battery modules), the high-temperature, high-pressure gaseous refrigerant becomes a medium-temperature, high-pressure liquid. The medium-temperature, high-pressure liquid refrigerant is throttled and depressurized by throttling valve 3 to a low-temperature, low-pressure liquid state, and finally flows back to the inlet of low-pressure circulation tank 4. Compressor 1 rapidly increases the temperature and pressure of the refrigerant, causing a large amount of heat to be released at the heat exchange components, thus increasing the heating rate. Oil separator 2 prevents refrigerant oil from entering the heat exchange components, ensuring heat exchange efficiency.

[0054] In the refrigerant-carrying heating mode using a liquid pump, compressor 1 stops and liquid pump 5 starts. The preheated liquid refrigerant in the low-pressure circulation tank 4 is transported to the heat exchange assembly via liquid pump 5. The liquid refrigerant exchanges heat with the energy storage element, heating the energy storage element, and then flows directly back from the heat exchange assembly to the inlet of the low-pressure circulation tank 4. Since the power consumption of liquid pump 5 is much lower than that of compressor 1, the refrigerant-carrying heating mode using a liquid pump can significantly reduce the system's energy consumption when the ambient temperature is not particularly low or the energy storage element in the energy storage device 100 requires relatively little heat.

[0055] In self-circulation mode, compressor 1 stops running, but the refrigerant in the system still retains a certain amount of heat. Through self-circulation mode, liquid pump 5 delivers the liquid refrigerant in low-pressure circulation tank 4 to the heat exchange components, utilizing the residual heat of the refrigerant to heat or equalize the temperature of energy storage device 100, fully recovering and utilizing the waste heat in the system, and improving energy utilization efficiency.

[0056] Compared with existing technologies, the integrated tank pump thermal management system in this embodiment solves the problem of a single heating mode in existing technologies. By setting two heating modes—compressor-driven refrigerant heating mode and liquid pump-driven refrigerant heating mode—it can flexibly switch according to different operating conditions, such as ambient temperature and the load demand of the energy storage device 100, thereby improving the system's adaptability in complex environments and avoiding the excessive operating burden caused by relying on a single compressor 1 for heating. Meanwhile, the liquid pump-driven refrigerant heating mode does not require starting the compressor 1; heating is achieved solely by driving the refrigerant circulation through the liquid pump 5. Compared with the traditional single compressor 1 heating mode, this significantly reduces system energy consumption, improves flexibility and applicability, and saves costs. Furthermore, this integrated tank pump thermal management system can also effectively utilize waste heat, fully recovering residual heat within the system and improving energy efficiency.

[0057] like Figures 1-4As shown, the integrated tank pump thermal management system in this embodiment also includes a first check valve 11, a second check valve 12, and a third check valve 13. The first check valve 11 is disposed between the oil separator 2 and the heat exchange assembly, the second check valve 12 is disposed between the heat exchange assembly and the throttle valve 3, and the third check valve 13 is disposed between the liquid pump 5 and the heat exchange assembly. The conduction direction of the third check valve 13 is consistent with the flow direction of the refrigerant in the self-circulation loop.

[0058] The first one-way valve 11 ensures that the refrigerant can only flow from the oil separator 2 to the heat exchange assembly, preventing the refrigerant from flowing back to the oil separator 2 when the system pressure changes. This ensures unidirectional refrigerant flow and improves system stability and reliability. The second one-way valve 12 ensures that the refrigerant can only flow from the heat exchange assembly to the throttle valve 3, preventing the refrigerant from flowing back to the heat exchange assembly when the throttle valve 3 is closed. This avoids pressure fluctuations within the heat exchange assembly and ensures efficient heat exchange. The third one-way valve 13 ensures that the refrigerant can only flow from the liquid pump 5 to the heat exchange assembly, preventing the refrigerant from flowing back to the liquid pump 5 when it stops operating. This protects the liquid pump 5 from damage caused by refrigerant backflow and extends its service life.

[0059] Furthermore, the integrated tank pump heat management system also includes a first solenoid valve 16, a second solenoid valve 17, and a third solenoid valve 18. The first solenoid valve 16 is located between the first check valve 11 and the heat exchange assembly, the second solenoid valve 17 is located between the heat exchange assembly and the second check valve 12, and the third solenoid valve 18 is located between the outlet of the low-pressure circulating tank 4 and the suction port of the compressor 1.

[0060] The first solenoid valve 16 and the second solenoid valve 17 can precisely control the flow and on / off of the refrigerant according to the system's operating mode and requirements. In the refrigerant-carrying heating mode, the first solenoid valve 16, the first check valve 11, the second solenoid valve 17, the second check valve 12, and the third solenoid valve 18 are all open to ensure that the refrigerant smoothly enters the heat exchange components.

[0061] like Figures 1-4 As shown, the integrated tank pump thermal management system in this embodiment also includes a first filter 8 and a second filter 9. The first filter 8 is disposed between the liquid pump 5 and the outlet of the low-pressure circulation tank 4, and the second filter 9 is disposed between the throttle valve 3 and the second one-way valve 12. The first filter 8 can filter out impurities and particulate matter in the refrigerant sucked in by the liquid pump 5, preventing impurities from entering the liquid pump 5 and the heat exchange components, avoiding blockage of the liquid pump 5 and contamination of the heat exchange components, and ensuring the normal operation of the system. The second filter 9 can filter out impurities in the refrigerant before the throttle valve 3, preventing impurities from entering the low-pressure circulation tank 4, protecting the heat exchange effect and reliability of the system.

[0062] like Figures 1-4As shown, the integrated tank pump thermal management system also includes a refrigerant heater 7, which is located inside the low-pressure circulation tank 4 or between the throttle valve 3 and the low-pressure circulation tank 4. The refrigerant heater 7 can preheat the refrigerant when the ambient temperature is low, increasing the refrigerant temperature and enhancing the system's heating capacity. In compressor-operated refrigerant heating mode, the preheated refrigerant enters the heat exchange components, releasing more heat and improving heating efficiency. In liquid pump-operated refrigerant heating mode, the preheated refrigerant is transported to the heat exchange components via liquid pump 5, similarly improving the heating effect. The refrigerant heater 7 allows the system to better adapt to different ambient temperature conditions, especially ensuring that the system's heating performance is not affected in cold regions or low-temperature environments.

[0063] like Figure 8 As shown, the refrigerant heater 7 is installed on the pipeline between the throttle valve 3 and the low-pressure circulation tank 4, that is, the refrigerant heater 7 is installed in the self-circulation loop.

[0064] like Figure 1 As shown, the refrigerant heater 7 is installed inside the low-pressure circulation tank 4.

[0065] For example, the refrigerant heater 7 can be configured as an electric heating rod or a PTC heating element.

[0066] like Figures 1-4 As shown, the integrated tank pump thermal management system also includes an oil return line 21. One end of the oil return line 21 is connected to the low-pressure circulation tank 4, and the other end is connected to the first one-way valve 11. A third filter 10 is installed on the oil return line 21. The oil return line 21 provides a path for lubricating oil to return from the low-pressure circulation tank 4 to the oil separator 2, achieving effective oil return and ensuring that the compressor 1 can continuously obtain sufficient lubricating oil during operation, maintaining good lubrication, reducing wear on the compressor 1, and improving its operational stability and service life. The third filter 10 can filter out impurities and particles in the lubricating oil, preventing impurities from entering the oil separator 2 and the compressor 1, ensuring the cleanliness of the lubricating oil, and further improving the operational reliability of the compressor 1.

[0067] Furthermore, the return oil passage 21 is also equipped with an ejector 22 and an ejector solenoid valve 23. The ejector 22 utilizes the ejection effect of compressed air or gas to enhance the flow speed and pressure of lubricating oil in the return oil passage 21, improve return oil efficiency, and ensure that lubricating oil can return quickly and stably. The ejector solenoid valve 23 can precisely control the opening and closing of the return oil passage 21, opening or closing the return oil passage 21 in a timely manner according to the system's operating status and needs, realizing intelligent return oil control, and further improving the system's automation level and operating efficiency.

[0068] like Figures 5-6As shown, the integrated tank pump thermal management system also includes a condenser 6, a fourth solenoid valve 19, and a fourth check valve 14. The inlet of the condenser 6 is connected to the outlet of the oil separator 2 via the fourth solenoid valve 19, and the outlet of the condenser 6 is connected to the throttle valve 3 via the fourth check valve 14. The integrated tank pump thermal management system also includes a fifth solenoid valve 20 and a fifth check valve 15, both of which are located between the heat exchange assembly and the low-pressure circulation tank 4. The fifth solenoid valve 20 controls the on / off state of the self-circulation loop, and the conduction direction of the fifth check valve 15 is consistent with the flow direction of the refrigerant in the self-circulation loop. The integrated tank pump thermal management system can achieve both forced cooling and natural cooling modes.

[0069] In forced cooling mode, compressor 1 starts, draws gaseous refrigerant from low-pressure circulation tank 4 and compresses it into a high-temperature, high-pressure gaseous state. After being separated by oil separator 2, it enters condenser 6 through fourth solenoid valve 19 and is cooled into a medium-temperature, high-pressure liquid state. The medium-temperature, high-pressure liquid refrigerant is then throttled and depressurized through fourth check valve 14 and throttle valve 3 to a low-temperature, low-pressure liquid state, and then enters low-pressure circulation tank 4. The gaseous refrigerant in low-pressure circulation tank 4 returns to compressor 1, and the liquid refrigerant is sent by liquid pump 5 to the heat exchange component in energy storage device 100 to exchange heat with the battery. The refrigerant coming out of the heat exchange component finally flows back to low-pressure circulation tank 4 through fifth solenoid valve 20 and fifth check valve 15.

[0070] In natural cooling mode, compressor 1, fourth solenoid valve 19, and fifth solenoid valve 20 are all closed, and liquid pump 5 is started. The liquid refrigerant in the low-pressure circulation tank 4 is transported to the heat exchange components by liquid pump 5, where it absorbs heat from the battery and turns into a gaseous state. The gaseous refrigerant enters the condenser 6 (relying on ambient wind or water for natural heat dissipation), and after condensing into a liquid state, it flows back to the low-pressure circulation tank 4 through the throttling valve 3. In natural cooling mode, by utilizing ambient cold sources (such as low-temperature air at night), compressor 1 does not need to run, significantly reducing energy consumption and making it suitable for scenarios where the ambient temperature is lower than the battery temperature.

[0071] For example, in this embodiment, the first check valve 11, the second check valve 12, the third check valve 13, the fourth check valve 14, and the fifth check valve 15 can all be commercially available spring-loaded check valves. The first solenoid valve 16, the second solenoid valve 17, the third solenoid valve 18, the fourth solenoid valve 19, and the fifth solenoid valve 20 can all be commercially available pilot-operated solenoid valves. The first filter 8, the second filter 9, and the third filter 10 can all be metal mesh filters.

[0072] In some alternative embodiments, the first solenoid valve 16 and the fourth solenoid valve 19 can be removed and replaced with a three-way valve, which can also achieve the switching of the refrigerant flow path.

[0073] like Figure 7As shown, in some optional embodiments, the ejector 22 and the ejector solenoid valve 23 can be removed, and the outlet of the return oil line 21 is directly connected to the third solenoid valve 18.

[0074] like Figures 2-6 As shown, the working principle of the integrated tank pump thermal management system in this embodiment is as follows:

[0075] like Figure 2 As shown, in the compressor-driven refrigerant heating mode, compressor 1 starts, drawing gaseous refrigerant from low-pressure circulation tank 4 and compressing it into high-temperature, high-pressure gaseous refrigerant. The high-temperature, high-pressure gaseous refrigerant passes through oil separator 2, where lubricating oil is separated, and then enters the heat exchange component in energy storage device 100 via first one-way valve 11 and first solenoid valve 16. In the heat exchange component, the refrigerant releases heat, transferring it to the energy storage elements in energy storage device 100 for heating, and cools itself into medium-temperature, medium-pressure liquid refrigerant. After being throttled and depressurized by throttling valve 3, the liquid refrigerant becomes low-temperature, low-pressure liquid refrigerant and flows into low-pressure circulation tank 4.

[0076] like Figure 3 As shown, in the refrigerant heating mode transported by the liquid pump, the compressor 1 stops running and the liquid pump 5 starts. The liquid pump 5 draws liquid refrigerant from the low-pressure circulation tank 4 and delivers it to the heat exchange component in the energy storage device 100 through the third one-way valve 13. In the heat exchange component, the liquid refrigerant heats the battery, and then the refrigerant that has undergone heat exchange returns to the low-pressure circulation tank 4, completing the cycle.

[0077] like Figure 4 As shown, in self-circulation mode, compressor 1 stops running and liquid pump 5 starts. Liquid pump 5 draws liquid refrigerant from low-pressure circulation tank 4 and delivers it to the heat exchange components in energy storage device 100 through the third one-way valve 13. In the heat exchange components, the liquid refrigerant absorbs or releases heat, regulating the temperature of the energy storage elements in energy storage device 100 and achieving a uniform temperature effect for the energy storage elements (i.e., battery modules). The refrigerant then returns to low-pressure circulation tank 4, completing the circulation. This mode utilizes the residual heat or cold energy within the integrated tank pump thermal management system to avoid energy waste, while maintaining temperature stability of the integrated tank pump thermal management system after compressor 1 stops.

[0078] like Figure 5As shown, in forced cooling mode, compressor 1 starts, drawing gaseous refrigerant from low-pressure circulation tank 4 and compressing it into high-temperature, high-pressure gaseous refrigerant. After being separated by oil separator 2, the high-temperature, high-pressure gaseous refrigerant enters condenser 6 through fourth solenoid valve 19 and is cooled to a medium-temperature, high-pressure liquid state. The medium-temperature, high-pressure liquid refrigerant then passes through fourth one-way valve 14 and throttling valve 3 to reduce its pressure to a low-temperature, low-pressure liquid state, and then enters low-pressure circulation tank 4. The gaseous refrigerant in low-pressure circulation tank 4 returns to compressor 1, while the liquid refrigerant is sent by liquid pump 5 to the heat exchange components in energy storage device 100 to exchange heat with the battery. The refrigerant exiting the heat exchange components finally flows back to low-pressure circulation tank 4 through fifth solenoid valve 20 and fifth one-way valve 15. This mode, through the forced operation of compressor 1, provides powerful cooling capacity and is suitable for scenarios with high ambient temperatures.

[0079] like Figure 6 As shown, in natural cooling mode, compressor 1 stops running and liquid pump 5 starts. Liquid pump 5 draws liquid refrigerant from low-pressure circulation tank 4 and delivers it to the heat exchange component in energy storage device 100 through third one-way valve 13. In the heat exchange component, the liquid refrigerant absorbs heat and evaporates into gaseous refrigerant. Then, the gaseous refrigerant passes through first solenoid valve 16 and fourth solenoid valve 19 in sequence into condenser 6. In condenser 6, the gaseous refrigerant dissipates heat naturally by ambient wind or water. After condensing into liquid, the gaseous refrigerant flows back to low-pressure circulation tank 4 through throttling valve 3. This mode utilizes the cold source of the natural environment, eliminating the need for compressor 1 to operate, significantly reducing energy consumption, and is suitable for scenarios with low ambient temperatures.

[0080] This embodiment also provides an energy storage device, which includes an energy storage unit 100 and the aforementioned integrated barrel pump thermal management system; the energy storage unit 100 includes a plurality of battery modules and a battery cold plate wrapped around the outside of the battery modules, the battery cold plate being a heat exchange component, and the battery modules being energy storage elements.

[0081] In the compressor-driven refrigerant heating mode, both ends of the battery cold plate are connected to the first outlet of the oil separator 2 and the throttle valve 3, respectively, allowing the high-temperature, high-pressure gaseous refrigerant to release heat within the battery cold plate. In the liquid pump-driven refrigerant heating mode and the self-circulation mode, both ends of the battery cold plate are connected to the inlet of the liquid pump 5 and the low-pressure circulation tank 4, respectively, allowing the liquid refrigerant (or naturally circulating refrigerant) to exchange heat with the battery module within the battery cold plate.

[0082] This energy storage device has multiple operating modes, which can significantly reduce operating energy consumption, improve energy utilization efficiency, and thus reduce the operating cost of the energy storage device.

[0083] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0084] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. An integrated tank pump thermal management system, characterized in that, It includes a low-pressure circulating tank (4), a liquid pump (5) and an energy storage device (100). The energy storage device (100) is equipped with a heat exchange component for exchanging heat with the energy storage element. The low-pressure circulating tank (4) contains refrigerant. The inlet of the liquid pump (5) is connected to the outlet of the low-pressure circulation tank (4), the outlet of the liquid pump (5) is connected to the inlet of the heat exchange component, and the outlet of the heat exchange component is connected to the inlet of the low-pressure circulation tank (4), forming a self-circulating loop. When the compressor (1) is not running, the liquid pump (5) can start and drive the refrigerant in the low-pressure circulation tank (4) to flow along the self-circulation loop to the heat exchange assembly.

2. The integrated tank pump thermal management system according to claim 1, characterized in that, The integrated barrel pump heat management system also includes a third check valve (13), which is located between the outlet of the liquid pump (5) and the inlet of the heat exchange component, and the conduction direction of the third check valve (13) is consistent with the flow direction of the refrigerant in the self-circulation loop.

3. The integrated tank pump thermal management system according to claim 1, characterized in that, The integrated tank pump heat management system also includes a fifth solenoid valve (20) and a fifth check valve (15), both of which are located between the heat exchange assembly and the low-pressure circulation tank (4). The fifth solenoid valve (20) is used to control the opening and closing of the self-circulation loop, and the conduction direction of the fifth check valve (15) is consistent with the flow direction of the refrigerant in the self-circulation loop.

4. The integrated tank pump thermal management system according to claim 1, characterized in that, The integrated tank pump thermal management system further includes a first filter (8), which is disposed between the inlet of the liquid pump (5) and the outlet of the low-pressure circulating tank (4).

5. The integrated tank pump thermal management system according to claim 1, characterized in that, The integrated tank pump thermal management system also includes a refrigerant heater (7), which is located in the low-pressure circulating tank (4) or in the self-circulating loop. The refrigerant heater (7) is configured to preheat the refrigerant when the ambient temperature is lower than a preset value.

6. The integrated tank pump thermal management system according to claim 5, characterized in that, The refrigerant heater (7) is an electric heating rod or a PTC heating element.

7. The integrated tank pump thermal management system according to claim 1, characterized in that, The integrated barrel pump thermal management system also includes an oil return path (21) and a third filter (10). One end of the oil return path (21) is connected to the low-pressure circulating barrel (4), and the other end of the oil return path (21) is connected to the oil separator (2). The third filter (10) is installed on the oil return path (21).

8. The integrated tank pump thermal management system according to claim 7, characterized in that, The return oil passage (21) is also equipped with an ejector (22) and an ejector solenoid valve (23). The ejector (22) is used to enhance the return oil power, and the ejector solenoid valve (23) is used to control the opening and closing of the return oil passage (21).

9. The integrated tank pump thermal management system according to any one of claims 1-8, characterized in that, The integrated barrel pump thermal management system also includes a controller, which is signal-connected to the liquid pump (5); the controller is configured to start the liquid pump (5) and enter a self-circulation mode after the compressor (1) stops and the temperature of the energy storage element is greater than a preset threshold.

10. An energy storage device, characterized in that, The energy storage device includes an energy storage unit (100) and an integrated barrel pump thermal management system according to any one of claims 1-9; the energy storage unit (100) includes a plurality of battery modules and a battery cold plate wrapped around the outside of the battery modules; the battery cold plate is a heat exchange component, the inlet of the battery cold plate is connected to the outlet of the liquid pump (5), and the outlet of the battery cold plate is connected to the liquid inlet of the low-pressure circulating tank (4).

Images