A water-cooled all-in-one machine and arrangement structure for high-voltage chain direct-hanging energy storage cabin

Abstract

The application discloses a water-cooling integrated machine for high-voltage chain direct-hanging energy storage cabin and a layout structure. The water-cooling integrated machine comprises a refrigeration unit, a main water pump, a degassing tank, an auxiliary water pump, a three-way regulating valve, a water storage and temperature mixing tank and a cooling medium pipeline. Cooling medium output by the refrigeration unit first cools energy storage batteries. Cooling medium at the outlet of the energy storage batteries flows to the degassing tank or the water storage and temperature mixing tank through the three-way regulating valve. Cooling medium at the outlet of a power module radiator of a converter flows to the degassing tank or is returned to the water storage and temperature mixing tank through the auxiliary water pump, is mixed in temperature in the water storage and temperature mixing tank and is then supplied to the power module of the converter again. The layout structure comprises an energy storage cabin, a plurality of energy storage batteries, a plurality of power modules of the converter and a cabin cooling medium connecting pipeline. Cooling branches of the energy storage batteries are connected in parallel with each other. Cooling branches of the power modules of the converter are connected in parallel with each other. The two types of cooling sections are connected in series. The application can realize that the two types of equipment share a water cooling system, adjust the inlet temperature of the power module of the converter, consider the heat dissipation and condensation prevention requirements and improve the system integration.

Description

Technical Field

[0001] This invention relates to the field of energy storage device cooling technology, and in particular to a high-pressure chain-type direct-connected energy storage tank water-cooled integrated unit and its arrangement structure. Background Technology

[0002] With the continuous expansion of installed capacity of new energy power generation, the output of new energy sources such as wind power and photovoltaics is characterized by randomness, fluctuation and intermittency. Large-capacity energy storage devices are gradually being applied to scenarios such as new energy power plants, grid regulation and source-grid-load-storage coordinated operation. Among them, high-voltage chain-type direct-connected energy storage devices are gradually being applied to large-capacity energy storage systems due to their relatively simple system structure, flexible capacity expansion and good grid adaptability.

[0003] In high-voltage chain-connected energy storage devices, to reduce the cost of the high-voltage DC connection between the energy storage battery and the converter, the energy storage battery and the corresponding converter power module are usually placed in the same energy storage compartment and arranged at the same potential. Both the energy storage battery and the converter power module generate heat during operation. To ensure long-term stable operation, a liquid cooling system is required to dissipate the heat generated during operation in a timely manner.

[0004] In existing technologies, to address the heat dissipation requirements of energy storage batteries and converter power modules within an energy storage compartment, separate cooling systems are typically configured. This involves separate liquid cooling systems for the energy storage batteries and for the converter power modules. While this approach allows for independent temperature control based on the operating characteristics of different devices, it requires multiple cooling systems and corresponding piping structures. This increases the number of devices inside the energy storage compartment, occupies more space, and also increases system cost, installation complexity, and maintenance difficulty.

[0005] To reduce system complexity, existing technologies have proposed using a shared cooling system to simultaneously cool both the energy storage battery and the converter power module. However, due to the different operating characteristics of the energy storage battery and the converter power module, their requirements for cooling medium temperature, flow rate, and heat dissipation capacity differ. The energy storage battery typically needs to maintain a relatively stable operating temperature to ensure cycle performance and operational safety; while the converter power module generates significant heat during high-power operation, requiring strong heat dissipation capabilities. When using the same cooling system, it is difficult to simultaneously meet the operating requirements of different devices, potentially leading to decreased temperature control of the energy storage battery or poor heat dissipation capacity of the converter power module, preventing its power devices from operating at optimal conditions.

[0006] Furthermore, in high-voltage chain-type direct-connected energy storage devices, the energy storage compartment typically houses multiple energy storage batteries and multiple converter power modules. As energy storage capacity increases, the number of devices and corresponding cooling pipelines also increases. Existing cooling systems are prone to problems such as uneven distribution of cooling media, complex pipeline layout, and increased equipment connection distances, affecting the utilization rate of the internal space of the energy storage compartment and the system integration effect.

[0007] To address the aforementioned issues, existing technologies have proposed improving equipment operational reliability by adding auxiliary heat dissipation equipment and improving the environmental conditions of the energy storage chamber. However, these methods primarily improve local heat dissipation conditions or environmental states, and are insufficient to address the differences in cooling requirements between different devices by considering the cooling medium circulation process and the overall structure of the cooling system.

[0008] Therefore, in high-voltage chain-type direct-connected energy storage devices, how to achieve effective heat dissipation of energy storage batteries and converter power modules while reducing the complexity of the cooling system, and how to improve the integration and reliability of the cooling system inside the energy storage compartment, remain problems that existing technologies need to solve. Summary of the Invention

[0009] To address the problem in existing technologies where the energy storage battery and the converter power module share a cooling system in a high-voltage chain-connected energy storage compartment, it is difficult to simultaneously achieve stable cooling of the energy storage battery, heat dissipation of the converter power module, and prevention of condensation due to the differences in their cooling requirements, one objective of this invention is to provide a water-cooled integrated unit for a high-voltage chain-connected energy storage compartment.

[0010] To achieve the above objectives, the present invention adopts the following technical solution: a high-pressure chain-type direct-connected energy storage compartment water-cooled integrated unit, including a refrigeration unit, a main water pump, a degassing tank, an auxiliary water pump, a three-way regulating valve, a water storage mixing tank, and a cooling medium pipeline. The cooling medium pipeline includes a first liquid supply branch, a second liquid supply branch, a first return branch, and a second return branch; The cooling medium outlet of the refrigeration unit forms a first liquid supply interface, which is used to connect with the cooling medium inlet of the energy storage battery. The inlet of the three-way regulating valve is used to connect with the cooling medium outlet of the energy storage battery, the first outlet of the three-way regulating valve is connected to the degassing tank via the first return branch, and the second outlet of the three-way regulating valve is connected to the inlet of the water mixing tank via the first liquid supply branch. The outlet of the water mixing tank is used to connect to the radiator inlet of the converter power module. The second return branch and the second liquid supply branch are both used to connect to the heat sink outlet of the converter power module. The second return branch is connected to the degassing tank via a check valve, and the second liquid supply branch is connected to the inlet of the water storage mixing tank via the auxiliary water pump. The outlet of the degassing tank is connected to the cooling medium inlet of the refrigeration unit via the main water pump.

[0011] Furthermore, the refrigeration unit includes a water-air heat exchanger and an evaporator of the refrigeration unit; the water outlet of the water-air heat exchanger is connected to the water inlet of the evaporator, and the water outlet of the evaporator forms the first liquid supply interface, enabling the cooling medium to undergo multi-stage heat exchange treatment, which is beneficial to improving the cooling capacity and outlet temperature stability of the cooling medium, and providing a more stable cooling medium for the energy storage battery.

[0012] Furthermore, the water mixing tank is equipped with an electric heater, an exhaust valve at the top, and a drain valve at the bottom, which can assist in heating the cooling medium when needed. In addition, it facilitates gas discharge and cooling medium discharge during maintenance, thereby improving the temperature regulation capability and maintenance convenience of the mixing tank.

[0013] Furthermore, a first temperature sensor, a first pressure sensor, and a first flow sensor are installed on the pipeline between the outlet of the water mixing tank and the inlet of the radiator of the converter power module. These sensors can acquire the temperature, pressure, and flow rate of the cooling medium entering the radiator of the converter power module, providing a basis for determining the cooling status of the power module inlet and for subsequent cooling adjustments.

[0014] Furthermore, a second temperature sensor and a second pressure sensor are provided on the pipeline on the heat sink outlet side of the converter power module, which can monitor the state of the cooling medium after heat exchange, and facilitate the evaluation of the heat dissipation effect of the converter power module and the operating status of the cooling circuit.

[0015] Furthermore, it also includes a controller, an electric heater installed in the water mixing tank, and an environmental detection unit for detecting the ambient temperature and humidity inside the energy storage compartment; the controller is connected to the environmental detection unit, the electric heater, the first temperature sensor, and the second temperature sensor respectively, and can adjust the temperature of the cooling medium according to the environmental conditions, thereby reducing the risk of condensation on the surface of the radiator.

[0016] Furthermore, the controller is connected to the three-way regulating valve and the auxiliary water pump respectively, and can adjust the flow state of different cooling medium branches and the proportion of medium entering the water mixing tank, thereby improving the regulation capability of the inlet cooling medium temperature and flow rate of the converter power module.

[0017] Furthermore, the first liquid supply interface is connected to an ion exchange branch, which is provided with a flow indicator, an ion exchanger and a filter element in sequence along the flow direction of the cooling medium. This facilitates the observation of the branch flow and allows for ion exchange and filtration of the circulating cooling medium, which helps maintain the circulating state of the cooling medium.

[0018] The advantages of the high-pressure chain-type direct-connected energy storage compartment water-cooled integrated unit of the present invention are as follows: Through the cooperation of the three-way regulating valve, the water mixing tank and the auxiliary water pump, the cooling medium output from the refrigeration unit can first flow through the energy storage battery for cooling, and the cooling medium at the outlet of the energy storage battery can selectively flow back to the degassing tank or enter the water mixing tank. At the same time, the cooling medium at the outlet of the converter power module radiator can selectively flow back to the degassing tank or return to the water mixing tank via the auxiliary water pump, and mix with the cooling medium from the energy storage battery before supplying it to the converter power module radiator. This regulates the temperature of the cooling medium at the inlet of the converter power module, solving the problem that the cooling requirements of the energy storage battery and the converter power module are different and the temperature of the cooling medium at the inlet of the converter power module is difficult to adjust flexibly when they share a water cooling system. This allows the energy storage battery and the converter power module to share the same cooling cycle system while taking into account different heat dissipation requirements, which helps to reduce the structural complexity of the water cooling system and the risk of condensation on the converter power module.

[0019] To address the problems in existing technologies where multiple energy storage batteries and multiple converter power modules are installed in a high-voltage chain-type direct-connected energy storage compartment, the increased number of equipment and cooling pipes leads to difficulties in coordinating the distribution of cooling media, complex pipeline layout within the compartment, and significant challenges in equipment connection and system integration. Another objective of this invention is to provide an arrangement structure for a water-cooled integrated unit in a high-voltage chain-type direct-connected energy storage compartment.

[0020] To achieve the above objectives, the present invention adopts the following technical solution: a layout structure of a high-pressure chain-type direct-connected energy storage compartment with a water-cooled integrated unit, including an energy storage compartment, the aforementioned high-pressure chain-type direct-connected energy storage compartment with a water-cooled integrated unit, n energy storage batteries, n converter power modules, and internal cooling medium connection pipelines, wherein n is an integer greater than or equal to 1. The internal cooling medium connection pipeline includes the energy storage battery liquid supply main pipeline, the energy storage battery liquid return main pipeline, the converter power module liquid supply main pipeline, and the converter power module liquid return main pipeline. The cooling medium inlet of each of the energy storage batteries is connected to the main liquid supply pipeline of the energy storage battery, and the cooling medium outlet is connected to the main liquid return pipeline of the energy storage battery, so as to form a cooling branch of the energy storage battery; when there are two or more cooling branches of the energy storage battery, the cooling branches of the energy storage battery are connected in parallel. The radiator inlet of each of the converter power modules is connected to the liquid supply main pipeline of the converter power module, and the radiator outlet is connected to the liquid return main pipeline of the converter power module, so as to form a cooling branch of the converter power module; when there are two or more cooling branches of the converter power module, the cooling branches of the converter power module are connected in parallel. The main liquid supply line of the energy storage battery is connected to the first liquid supply interface, and the main liquid return line of the energy storage battery is connected to the inlet of the three-way regulating valve; the three-way regulating valve is connected to the inlet of the water mixing tank via the first liquid supply branch, and the outlet of the water mixing tank is connected to the main liquid supply line of the converter power module; the main liquid return line of the converter power module is connected to the second return branch and the second liquid supply branch respectively. At least a portion of the cooling medium flowing out of the energy storage battery cooling branch sequentially enters the converter power module cooling branch through the energy storage battery return main pipeline, the three-way regulating valve, the first liquid supply branch, and the water mixing tank, so that the energy storage battery cooling section formed by the energy storage battery cooling branch and the converter power module cooling section formed by the converter power module cooling branch form a series cooling relationship in the overall cooling medium circulation path.

[0021] Furthermore, each energy storage battery and its corresponding converter power module are arranged adjacent to each other on the left and right, and the energy storage battery and the corresponding converter power module are arranged in the same compartment and at the same potential, which can shorten the high-voltage electrical connection distance between them, make the internal structure of the energy storage compartment more compact, and help reduce the complexity of high-voltage connections.

[0022] Furthermore, the n energy storage batteries are arranged in rows, with each row including two energy storage batteries arranged vertically and two corresponding converter power modules; the high-voltage box output port of the energy storage battery and the input terminal of the frequency doubler filter circuit of the corresponding converter power module face the same direction, improving the utilization rate of the internal space of the energy storage compartment; at the same time, it can shorten the high-voltage connection line path and reduce the wiring complexity.

[0023] Furthermore, the main supply pipeline of the energy storage battery and the main return pipeline of the energy storage battery constitute the main water pipe group of the cooling medium of the energy storage battery, and the main supply pipeline of the converter power module and the main return pipeline of the converter power module constitute the main water pipe group of the cooling medium of the converter power module. The main water pipe group of the cooling medium of the energy storage battery and the main water pipe group of the cooling medium of the converter power module are arranged back to back, which can reduce the crossing between different cooling pipes, make the pipeline layout in the compartment clearer and more compact, and help improve the convenience of installation, inspection and maintenance.

[0024] The beneficial effects of the water-cooled integrated unit arrangement structure of the high-voltage chain-type direct-mounted energy storage compartment of the present invention are as follows: By coordinating the cooling branches of the energy storage batteries, the cooling branches of the converter power modules, and the connecting pipes of the cooling medium in the compartment, the present invention enables multiple energy storage batteries and multiple converter power modules to form parallel cooling relationships, and the cooling sections of the energy storage batteries and the cooling sections of the converter power modules to form a series cooling relationship in the overall cooling medium circulation path. At the same time, by combining the adjacent left and right arrangement of the energy storage batteries and the corresponding converter power modules on the same side, in the same compartment and at the same potential, and the back-to-back arrangement of the main water pipe groups of the energy storage battery cooling medium and the main water pipe groups of the converter power module cooling medium, the present invention solves the problems of difficult coordination of cooling medium distribution, complex cooling pipe layout, and high difficulty in equipment connection and system integration when the number of devices in the high-voltage chain-type direct-mounted energy storage compartment increases. The present invention makes the cooling medium circulation path in the energy storage compartment clearer, the equipment and pipe layout more compact, facilitates shortening of equipment connection paths, reduces cooling pipe intersections, and improves the space utilization of the energy storage compartment and the convenience of equipment installation, maintenance and capacity expansion. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall circulation system of a high-pressure chain-type direct-connected energy storage compartment using an integrated water-cooled unit, as described in this invention.

[0026] Figure 2 The schematic diagram of the battery and power conversion circuit for the cascaded H-bridge energy storage submodule.

[0027] Figure 3 This is a schematic diagram of the layout of the water-cooling system equipment for the energy storage compartment and the arrangement of the battery liquid cooling pipeline in this invention.

[0028] Figure 4 This is a schematic diagram of the internal power sub-module, battery module and water cooling pipeline layout of the energy storage compartment in this invention.

[0029] In the diagram: 1. Energy storage compartment; 2. Converter power module; 3. Energy storage battery; 4. Water-cooled main unit; 5. Main water pump; 6. Degassing tank; 7. Auxiliary water pump; 8. Three-way regulating valve; 9. Water mixing tank; 10. Electric heater; 11. Ion exchanger; 12. Refrigeration unit; 13. Water-air heat exchanger; 14. Condenser; 15. High-pressure water storage tank; 16. Filter; 17. Evaporator; A. First liquid supply branch; B. Second liquid supply branch; C. First return branch; D. Second return branch. Detailed Implementation

[0030] To make the above-mentioned objectives, technical solutions and beneficial effects of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein. Those skilled in the art can make modifications and improvements without departing from the inventive concept. Therefore, the scope of protection of the invention is not limited to the following specific embodiments.

[0032] It should be noted that in this embodiment, "connection" can be a direct connection or an indirect connection through other components; "set at" can be a fixed setting or a detachable setting, and the specific choice can be made according to the actual application scenario.

[0033] Example 1 Reference Figure 1 and Figure 2 This is the first embodiment of the present invention, which provides a water-cooled integrated unit for a high-voltage chain-type direct-connected energy storage compartment. The water-cooled integrated unit is used to connect to the energy storage battery 3 and the converter power module 2 inside the energy storage compartment 1, so as to cool the energy storage battery 3 and the converter power module 2 respectively.

[0034] In this embodiment, the water-cooled integrated unit, through the cooperation of the refrigeration unit, main water pump 5, degassing tank 6, auxiliary water pump 7, three-way regulating valve 8, water mixing tank 9, and cooling medium pipeline, enables the energy storage battery 3 and the converter power module 2 to share the same cooling circulation system, and can adjust the state of the cooling medium entering the converter power module 2. Figure 1 The diagram shows the main equipment area of ​​the integrated water-cooled unit 4. The water-cooled unit 4 is connected to the energy storage battery 3 and the converter power module 2 in the energy storage compartment 1 through cooling medium pipelines.

[0035] Specifically, the water-cooled integrated unit includes a refrigeration unit, a main water pump 5, a degassing tank 6, an auxiliary water pump 7, a three-way regulating valve 8, a water storage mixing tank 9, and a cooling medium pipeline; the cooling medium pipeline includes a first liquid supply branch A, a second liquid supply branch B, a first return branch C, and a second return branch D.

[0036] The refrigeration unit is used to cool the cooling medium, and the cooling medium outlet of the refrigeration unit forms a first liquid supply interface, which is connected to the cooling medium inlet of the energy storage battery 3.

[0037] Specifically, the cooling medium is cooled by the refrigeration unit and then enters the energy storage battery 3 through the first liquid supply interface, and absorbs the heat generated during the operation of the energy storage battery 3 through the cooling channel inside the energy storage battery 3.

[0038] Furthermore, the refrigeration unit includes a water-air heat exchanger 13 and an evaporator 17 of the refrigeration unit 12; the water outlet of the water-air heat exchanger 13 is connected to the water inlet of the evaporator 17, and the water outlet of the evaporator 17 forms the first liquid supply interface. (Refer to...) Figure 1 The refrigeration unit 12 also includes a condenser 14, a high-pressure water tank 15, and a filter 16 installed on the refrigerant circulation pipeline; the condenser 14, the high-pressure water tank 15, the filter 16, and the evaporator 17 are arranged according to... Figure 1 The refrigerant circulation path shown is connected, wherein filter 16 is located between high-pressure water tank 15 and evaporator 17, and is used to filter the refrigerant before it enters evaporator 17.

[0039] Specifically, after the cooling medium enters the refrigeration unit, it first flows through the water-air heat exchanger 13 for heat exchange, and then enters the evaporator 17 of the refrigeration unit 12 for further cooling. Subsequently, it flows from the water outlet of the evaporator 17 to the energy storage battery 3.

[0040] By cooperating with the water-air heat exchanger 13 and the evaporator 17, the cooling medium can be cooled by heat exchange according to the operating conditions, so that the cooling medium supplied to the energy storage battery 3 is kept within the temperature range that meets the cooling requirements of the energy storage battery 3, and the energy consumption of the refrigeration unit 12 can be reduced.

[0041] Furthermore, the cooling medium outlet of the energy storage battery 3 is connected to the inlet of the three-way regulating valve 8. The three-way regulating valve 8 has a first outlet and a second outlet, wherein the first outlet is connected to the degassing tank 6 via the first return branch C, and the second outlet is connected to the inlet of the water mixing tank 9 via the first liquid supply branch A.

[0042] Specifically, the cooling medium absorbs the heat generated during the operation of the energy storage battery 3 after flowing through it, and flows into the three-way regulating valve 8 from the cooling medium outlet of the energy storage battery 3.

[0043] Through the three-way regulating valve 8, the cooling medium at the outlet of the energy storage battery 3 forms two flow paths: one path returns to the degassing tank 6 via the first return branch C, and the other path enters the water mixing tank 9 via the first liquid supply branch A. The amount of cooling medium entering these two paths can be distributed by adjusting the opening of the three-way regulating valve 8.

[0044] In actual operation, the ratio of cooling medium returning through the first return branch C and entering the water mixing tank 9 through the first liquid supply branch A can be adjusted according to the cooling status of the energy storage battery 3 and the cooling requirements of the converter power module 2.

[0045] Furthermore, the outlet of the water mixing tank 9 is connected to the inlet of the radiator of the converter power module 2; the water mixing tank 9 is used to receive the cooling medium entering through the first liquid supply branch A and the cooling medium returning through the second liquid supply branch B, and to supply the mixed cooling medium to the radiator of the converter power module 2.

[0046] Specifically, the cooling medium from the outlet of the energy storage battery 3 and the return cooling medium from the outlet of the radiator of the converter power module 2 are mixed in the water mixing tank 9. The mixed cooling medium flows into the radiator of the converter power module 2 from the outlet of the water mixing tank 9 to cool the power devices therein.

[0047] By setting up a water mixing tank 9, the temperature of the inlet cooling medium of the converter power module 2 can be changed by mixing cooling media from different sources, so as to take into account both the heat dissipation requirements and the anti-condensation requirements of the converter power module 2.

[0048] Furthermore, both the second return branch D and the second liquid supply branch B are connected to the radiator outlet of the converter power module 2; the second return branch D is connected to the degassing tank 6, and the second liquid supply branch B is connected to the inlet of the water storage mixing tank 9 via the auxiliary water pump 7; this second liquid supply branch B corresponds to Figure 1 The mixing and return path is from the outlet of the radiator of the converter power module 2 back to the mixing tank 9.

[0049] Specifically, the cooling medium at the radiator outlet of the converter power module 2 is divided into two paths: one path returns to the degassing tank 6 via the second return branch D, and the other path returns to the water storage mixing tank 9 via the second liquid supply branch B and the auxiliary water pump 7 to participate in the mixing process in the water storage mixing tank 9.

[0050] By controlling the auxiliary water pump 7, the return flow state of the cooling medium at the outlet of the converter power module 2 and the flow rate back to the water mixing tank 9 can be adjusted, providing the execution conditions for regulating the temperature and flow rate of the cooling medium at the inlet of the converter power module 2.

[0051] Furthermore, an electric heater 10 is provided inside the water mixing tank 9 to provide auxiliary heating to the cooling medium inside the water mixing tank 9 when it is necessary to increase the temperature of the cooling medium at the inlet of the converter power module 2.

[0052] The water mixing tank 9 is equipped with an exhaust valve at the top and a drain valve at the bottom; the exhaust valve is used to discharge the gas accumulated in the water mixing tank 9, and the drain valve is used to discharge the cooling medium in the water mixing tank 9 during maintenance or repair.

[0053] Furthermore, the outlet of the degassing tank 6 is connected to the cooling medium inlet of the refrigeration unit via the main water pump 5; the degassing tank 6 is used to perform gas-liquid separation of the circulating cooling medium, and the main water pump 5 is used to provide driving force for the main circulation.

[0054] Specifically, in the main circulation, the cooling medium can pass through the main water pump 5, the refrigeration unit, the energy storage battery 3, the three-way regulating valve 8, the water mixing tank 9, and the radiator of the converter power module 2 in sequence, and return to the degassing tank 6 through the second return branch D; at the same time, part of the cooling medium can form bypass return and mixed temperature return through the first return branch C and the second liquid supply branch B respectively.

[0055] Furthermore, the first liquid supply interface is connected to an ion exchange branch. (Refer to...) Figure 1 The ion exchange branch is equipped with a flow indicator, an ion exchanger 11, and a filter element. The flow indicator displays the flow rate of the medium in the ion exchange branch, the ion exchanger 11 reduces the ion content in the cooling medium, and the filter element traps particulate impurities in the circulating cooling medium. It should be noted that... Figure 1 The filter element in this ion exchange branch is not individually labeled, and the filter 16 corresponding to the label 16 is as follows: Figure 1 It is installed on the refrigerant circulation pipeline of refrigeration unit 12.

[0056] It should be noted that, Figure 1 The water-cooled main unit 4 in the diagram represents the main equipment area of ​​the integrated water-cooled unit; the refrigeration unit 12, water-air heat exchanger 13, condenser 14, high-pressure water tank 15, filter 16, and evaporator 17 are all designed according to... Figure 1 The locations and piping relationships are shown. Among them, the water-air heat exchanger 13 and the evaporator 17 are used to exchange heat and cool down the cooling medium in the water-cooled main circulation. The condenser 14, the high-pressure water storage tank 15, the filter 16 and the evaporator 17 constitute the corresponding components of the refrigerant circulation side of the refrigeration unit 12. The filter 16 is installed on the refrigerant circulation pipeline between the high-pressure water storage tank 15 and the evaporator 17.

[0057] Working principle When the water-cooled integrated unit is running, the main water pump 5 starts, driving the cooling medium in the degassing tank 6 into the refrigeration unit. After heat exchange and cooling through the water-air heat exchanger 13 and the evaporator 17 of the refrigeration unit 12, it enters the energy storage battery 3 through the first liquid supply interface. After absorbing heat from the energy storage battery 3, the cooling medium enters the three-way regulating valve 8. Part of it returns to the degassing tank 6 via the first return branch C, and the other part enters the water mixing tank 9 via the first liquid supply branch A. At the same time, part of the cooling medium from the radiator outlet of the converter power module 2 returns to the degassing tank 6 via the second return branch D, and the other part returns to the water mixing tank 9 via the second liquid supply branch B and the auxiliary water pump 7. The cooling medium in the water mixing tank 9 is mixed and then supplied to the radiator of the converter power module 2, realizing the circulating heat exchange under the shared cooling system of the energy storage battery 3 and the converter power module 2.

[0058] In summary, this embodiment achieves the cooperating of the refrigeration unit, main water pump 5, degassing tank 6, three-way regulating valve 8, water mixing tank 9, and auxiliary water pump 7, enabling the energy storage battery 3 and the converter power module 2 to share the same water cooling circulation system. The cooling medium is divided, refluxed, and mixed through the first liquid supply branch A, the second liquid supply branch B, the first return branch C, and the second return branch D, thus providing a foundation for the stable cooling of the energy storage battery 3 and the heat dissipation and anti-condensation of the converter power module 2.

[0059] Example 2 Reference Figure 1 and Figure 2 This is the second embodiment of the present invention. Based on Embodiment 1, this embodiment further explains the detection, temperature adjustment, and anti-condensation control processes of the integrated water-cooled unit.

[0060] This embodiment includes a controller, an environmental detection unit, a first temperature sensor, a first pressure sensor, a first flow sensor, a second temperature sensor, and a second pressure sensor. The environmental detection unit is used to detect the ambient temperature and humidity inside the energy storage compartment 1. The first temperature sensor, the first pressure sensor, and the first flow sensor are installed on the pipeline between the outlet of the water mixing tank 9 and the radiator inlet of the converter power module 2. The second temperature sensor and the second pressure sensor are installed on the pipeline on the radiator outlet side of the converter power module 2.

[0061] Specifically, during operation of the water-cooled integrated unit, the main water pump 5 drives the cooling medium to circulate. The cooling medium output from the refrigeration unit enters the energy storage battery 3, and the cooling medium from the outlet of the energy storage battery 3 enters the first return branch C and the first liquid supply branch A respectively via the three-way regulating valve 8; the cooling medium entering the first liquid supply branch A flows into the water mixing tank 9. The cooling medium from the outlet of the radiator of the converter power module 2 enters the second return branch D and the second liquid supply branch B respectively. The cooling medium returning to the water mixing tank 9 via the second liquid supply branch B and the auxiliary water pump 7 is mixed with the cooling medium from the energy storage battery 3 and then supplied to the radiator of the converter power module 2.

[0062] Furthermore, after flowing through the energy storage battery 3, the cooling medium absorbs the heat generated during the operation of the energy storage battery 3 and flows out from the cooling medium outlet of the energy storage battery 3. The cooling medium from the outlet of the energy storage battery 3 enters the three-way regulating valve 8.

[0063] The three-way regulating valve 8 divides the cooling medium at the outlet of the energy storage battery 3 into two paths according to the operating status: one path of cooling medium returns to the degassing tank 6 via the first return branch C; the other path of cooling medium enters the water mixing tank 9 via the first liquid supply branch A. The amount of cooling medium entering the water mixing tank 9 can be changed by adjusting the three-way regulating valve 8.

[0064] Furthermore, the water mixing tank 9 receives cooling medium from the outlet of the energy storage battery 3, and simultaneously receives cooling medium returned from the radiator outlet of the converter power module 2 via the second liquid supply branch B.

[0065] The two cooling media are mixed inside the water mixing tank 9. The mixed cooling media flows out from the outlet of the water mixing tank 9 and enters the radiator inlet of the converter power module 2. The radiator of the converter power module 2 uses the cooling media to remove the heat generated during the operation of the converter power module 2, so that the power devices in the converter power module 2 are kept within a suitable operating temperature range.

[0066] Furthermore, after the cooling medium flows out of the radiator outlet of the converter power module 2, it is divided into two paths: one path enters the degassing tank 6 via the second return branch D; the other path returns to the water storage mixing tank 9 via the second liquid supply branch B and the auxiliary water pump 7. By controlling the operating status of the auxiliary water pump 7, the flow rate of the cooling medium returning from the radiator outlet of the converter power module 2 to the water storage mixing tank 9 can be adjusted.

[0067] Therefore, the water mixing tank 9 contains simultaneously: cooling medium from the outlet of the energy storage battery 3 and cooling medium from the outlet of the radiator of the converter power module 2. The two cooling media are mixed to form a cooling medium suitable for use by the radiator of the converter power module 2.

[0068] Specifically, during the operation of a high-voltage chain-type direct-connected energy storage device, environmental control equipment is usually installed inside the energy storage compartment to maintain the internal temperature and humidity within a certain range.

[0069] However, the power devices in the converter power module 2 are typically small in size and have high power density, and heat is concentrated in the area near the power devices during operation.

[0070] When the converter power module 2 uses a lower temperature cooling medium for heat dissipation, the surface temperature of the radiator of the converter power module 2 may be lower than the dew point temperature of the air in the energy storage compartment, causing water vapor in the air to condense on the radiator surface.

[0071] Therefore, in this embodiment, the ambient temperature and humidity of the energy storage compartment and the inlet temperature of the cooling medium of the converter power module 2 are obtained through the controller, and the risk of condensation is determined based on the detection results.

[0072] Furthermore, the water-cooled integrated unit also includes a controller and an environmental monitoring unit.

[0073] The environmental monitoring unit is used to detect the ambient temperature and humidity inside the energy storage compartment 1.

[0074] The controller is connected to the environmental detection unit, the electric heater 10, the first temperature sensor, the first pressure sensor, the first flow sensor, the second temperature sensor, the second pressure sensor, the three-way regulating valve 8, and the auxiliary water pump 7. The controller can control the electric heater 10, the three-way regulating valve 8, and the auxiliary water pump 7 based on the detection results of ambient temperature and humidity and the temperature, pressure, and flow rate of the cooling medium.

[0075] Specifically, the environmental monitoring unit is used to acquire the ambient temperature and relative humidity of the energy storage compartment 1; the first temperature sensor is used to detect the inlet cooling medium temperature of the converter power module 2, the first pressure sensor is used to detect the inlet-side cooling medium pressure, and the first flow sensor is used to detect the flow rate of the cooling medium entering the radiator of the converter power module 2; the second temperature sensor is used to detect the outlet cooling medium temperature of the converter power module 2, and the second pressure sensor is used to detect the outlet-side cooling medium pressure. The controller determines the current cooling status based on the above detection parameters and performs corresponding adjustments.

[0076] In one alternative implementation, the controller calculates the dew point temperature based on the ambient temperature and relative humidity of the energy storage compartment.

[0077] The relationship for calculating dew point temperature is as follows: =

[0078] in: )=In( )+

[0079] in: This indicates the dew point temperature, expressed in °C. This indicates the ambient temperature of the energy storage compartment, in °C. RH represents the relative humidity of the energy storage chamber environment; a and b represent preset constants in the dew point calculation model. In one implementation, a can be set to 17.625°C and b to 243.04°C, respectively.

[0080] Furthermore, to reduce the possibility of condensation on the surface of the heat sink of the converter power module 2, a safety margin is set based on the dew point temperature.

[0081] The temperature limit for preventing condensation is: = +Δ

[0082] in: Indicates the temperature limit for preventing condensation; Δ This indicates the dew point safety margin.

[0083] In a preferred embodiment, considering temperature detection error, system response lag, and fluctuations in the energy storage compartment's operating environment, Δ Set the temperature to 5℃.

[0084] Therefore, the inlet temperature of the cooling medium in the power module meets the following requirements: ≥ +5℃ This can reduce the risk of condensation on the heat sink surface of the converter power module 2.

[0085] The table below shows the calculation of dew point temperature under different temperature and humidity conditions. The dew point temperatures calculated under standard atmospheric pressure conditions based on different ambient temperatures and relative humidity are shown in the table below:

[0086] For example: when the ambient temperature of the energy storage chamber is 35℃ and the relative humidity is 75%RH: Dew point temperature is: =29.89℃ Considering a 5°C safety margin: =34.89℃ Therefore, the inlet temperature of the cooling medium of the converter power module 2 can be controlled at approximately 35°C or higher to reduce the risk of condensation.

[0087] When the controller detects that the ambient humidity in the energy storage compartment is rising and the inlet temperature of the cooling medium of the converter power module 2 is close to the anti-condensation temperature limit, the controller will start the electric heater 10.

[0088] The electric heater 10 heats the cooling medium in the water mixing tank 9, increasing the temperature of the cooling medium entering the radiator of the converter power module 2. As the converter power module 2 operates, the temperature of the cooling medium at the radiator outlet of the converter power module 2 gradually increases. At this time, the controller controls the auxiliary water pump 7 to operate, causing the cooling medium at the radiator outlet of the converter power module 2 to circulate back into the water mixing tank 9 and mix with the cooling medium from the outlet of the energy storage battery 3.

[0089] When the inlet temperature of the cooling medium of the converter power module 2 reaches the anti-condensation requirement, the controller controls the electric heater 10 to stop running and maintains the cooling medium temperature stable through the three-way regulating valve 8 and the auxiliary water pump 7.

[0090] In one optional embodiment, the temperature of the cooling medium inside the water mixing tank 9 can be determined based on the relationship between the cooling medium flow rate and temperature. Ignoring heat dissipation from the cooling medium pipeline and heat loss from the water mixing tank 9, according to the mass conservation law of the cooling medium, the cooling medium flow rate at the outlet of the water mixing tank 9 satisfies: F= +

[0091] in: F indicates the flow rate of the cooling medium at the outlet of the water mixing tank 9. ; This indicates the flow rate of the cooling medium entering the water mixing tank 9 from the outlet of the energy storage battery 3; This indicates the flow rate of the cooling medium returning from the radiator outlet of the converter power module 2 to the water mixing tank 9.

[0092] According to the energy conservation principle of the cooling medium, the outlet temperature of the water mixing tank 9 satisfies: =

[0093] in: This indicates the temperature of the cooling medium at the inlet of converter power module 2; This indicates the temperature of the cooling medium at the outlet of energy storage battery 3; This indicates the temperature of the return cooling medium at the outlet of converter power module 2.

[0094] The mixing ratio of different cooling media can be determined based on the target flow rate and target temperature.

[0095] In this embodiment, the environmental monitoring unit detects the environmental status of the energy storage compartment, and the first temperature sensor detects the temperature of the cooling medium at the inlet of the converter power module 2. The controller adjusts the electric heater 10, the three-way regulating valve 8, and the auxiliary water pump 7 based on the detection results. When there is a risk of condensation in the converter power module 2, the temperature of the cooling medium entering the radiator of the converter power module 2 is increased; when the heat dissipation demand of the converter power module 2 increases, the cooling medium circulation ratio is adjusted to ensure that the converter power module 2 receives a cooling medium that meets the heat dissipation requirements, thereby achieving a balance between the heat dissipation capacity and anti-condensation safety of the converter power module 2.

[0096] In summary, this embodiment, through the cooperation of the controller, environmental detection unit, first temperature sensor, electric heater 10, three-way regulating valve 8 and auxiliary water pump 7, can adjust the mixing process according to the ambient temperature and humidity of the energy storage compartment 1 and the inlet cooling medium temperature of the converter power module 2, so that the converter power module 2 can meet the heat dissipation requirements while reducing the risk of condensation.

[0097] Example 3 Reference Figure 1 and Figure 2 This is the third embodiment of the present invention. Based on Embodiments 1 and 2, this embodiment further explains the mixing process of the water mixing tank 9 and the method by which the controller adjusts the flow rate and temperature of the cooling medium.

[0098] In this embodiment, the flow rate and temperature of the cooling medium entering the radiator of the converter power module 2 are regulated by the cooperation of the three-way regulating valve 8, the auxiliary water pump 7, the water mixing tank 9, the first temperature sensor, the first flow sensor, and the second temperature sensor.

[0099] Specifically, during the operation of the water-cooled integrated unit, the cooling medium entering the water storage mixing tank 9 mainly consists of two parts.

[0100] The first part is the cooling medium that enters the water mixing tank 9 from the outlet of the energy storage battery 3 via the three-way regulating valve 8 and the first liquid supply branch A; the second part is the cooling medium that returns to the water mixing tank 9 from the outlet of the radiator of the converter power module 2 via the second liquid supply branch B and the auxiliary water pump 7.

[0101] The temperatures of the two cooling media mentioned above are usually different. By changing the flow ratio of the two cooling media entering the water mixing tank 9, the temperature of the cooling media at the outlet of the water mixing tank 9 can be changed. If necessary, the cooling media in the water mixing tank 9 can also be heated by the electric heater 10.

[0102] The two cooling media enter the water mixing tank 9 and are mixed. The mixed cooling media is then supplied to the radiator of the converter power module 2 from the outlet of the water mixing tank 9, so that the temperature and flow rate of the cooling media entering the radiator of the converter power module 2 are within the range that meets the operating requirements of the converter power module 2.

[0103] In one alternative embodiment, the mixing process of the water mixing tank 9 can be adjusted according to the flow rate and temperature parameters of the cooling medium.

[0104] The following is a table of the main control variables:

[0105] In one alternative embodiment, ignoring heat dissipation from the cooling medium pipeline and heat loss from the water mixing tank 9, and assuming that the physical properties of the two cooling media are essentially the same, the cooling medium flow rate at the outlet of the water mixing tank 9 satisfies the following according to the cooling medium flow rate conservation relationship: F= +

[0106] F This indicates the flow rate of the cooling medium from the outlet of the water mixing tank 9 to the radiator of the converter power module 2; This indicates the flow rate of the cooling medium from the outlet of the energy storage battery 3 into the water mixing tank 9 via the three-way regulating valve 8 and the first liquid supply branch A. This indicates the flow rate of the cooling medium returning from the outlet of the radiator of the converter power module 2 to the water storage mixing tank 9 via the second liquid supply branch B and the auxiliary water pump 7.

[0107] According to the energy conservation principle of the cooling medium, the outlet temperature of the cooling medium in the water mixing tank 9 satisfies: =

[0108] in: This indicates the temperature of the cooling medium at the outlet of the water mixing tank 9, which is also the inlet of the radiator of the converter power module 2. This indicates the temperature of the cooling medium entering the water mixing tank 9 from the outlet of the energy storage battery 3; This indicates the temperature of the cooling medium returning from the outlet of the radiator of the converter power module 2 to the water mixing tank 9.

[0109] From the above relationships, we can see that: exist < In the case of, when When the volume increases, the proportion of the cooling medium at the outlet of the energy storage battery 3, which has a relatively lower temperature, increases in the cooling medium entering the water mixing tank 9, and the temperature of the cooling medium at the outlet of the water mixing tank 9 increases. reduce; when When the power converter module 2 radiator outlet temperature increases, the proportion of return cooling medium increases, and the outlet temperature of the cooling medium in the water mixing tank 9 increases. Increase.

[0110] Therefore, by adjusting and It can adjust the temperature and flow rate of the cooling medium at the inlet of the radiator of the power module 2 converter.

[0111] Furthermore, the target flow rate at the inlet of the radiator of the converter power module 2 can be set according to the heat dissipation requirements of the converter power module 2. and target temperature .

[0112] In one alternative implementation, when ≠ And target temperature lie in and When the two parts of the cooling medium are in between, the target mixing flow rate can be determined based on the above flow conservation and energy conservation relationships.

[0113] The target flow rate of the cooling medium entering the water mixing tank 9 from the outlet of the energy storage battery 3. satisfy: = ×

[0114] The target flow rate of the cooling medium returning from the outlet of the radiator of converter power module 2 to the water mixing tank 9 satisfy: = ﹣

[0115] Based on the above relationships, the target flow rate at the inlet of the radiator of converter power module 2 can be determined. Target temperature and the actual temperature of the two cooling media. and The mixing ratio of the cooling medium at the outlet of the energy storage battery 3 and the return cooling medium at the outlet of the converter power module 2 is determined.

[0116] In this embodiment, the controller adjusts the three-way regulating valve 8, the auxiliary water pump 7, and the electric heater 10 based on the detection results.

[0117] The specific control strategies are shown in the table below:

[0118] It should be noted that the target temperature It can also be combined with the anti-condensation temperature limit determined according to the ambient temperature and humidity of the energy storage compartment 1 in Embodiment 2, so that the temperature of the cooling medium at the inlet of the radiator of the converter power module 2 meets the heat dissipation requirements and is not lower than the corresponding anti-condensation temperature limit.

[0119] This embodiment establishes a correspondence between the flow rates of the two cooling media in the water mixing tank 9 and the temperature of the mixed cooling media, and controls the flow rate of the cooling media from the outlet of the energy storage battery 3 into the water mixing tank 9 through the three-way regulating valve 8. The flow rate of the cooling medium returning from the outlet of the radiator of the converter power module 2 to the water storage mixing tank 9 is controlled by the auxiliary water pump 7. This allows the temperature and flow rate of the cooling medium at the outlet of the water mixing tank 9 to be adjusted according to the operating requirements of the converter power module 2.

[0120] In summary, this embodiment establishes an adjustment relationship between the cooling medium mixing ratio and the inlet temperature and flow rate of the converter power module 2 through the cooperation of the water mixing tank 9, the three-way regulating valve 8, the auxiliary water pump 7, the first temperature sensor, the first flow sensor, and the second temperature sensor. This makes the mixing process have clear detection quantities and actuators, thus facilitating the implementation of corresponding control by those skilled in the art in accordance with this specification.

[0121] Example 4 Reference Figure 1 , Figure 3 and Figure 4 This is the fourth embodiment of the present invention, which provides an arrangement structure for a high-pressure chain-type direct-connected energy storage compartment using an integrated water-cooled unit.

[0122] Specifically, the arrangement structure includes an energy storage compartment 1, a water-cooled integrated unit, n energy storage batteries 3, n converter power modules 2, and internal cooling medium connection pipelines, where n is an integer greater than or equal to 1. The main equipment of the water-cooled integrated unit can be composed of... Figure 1 The water-cooled host 4 and the refrigeration unit 12 shown are composed of or equipped with each other, and are connected to the energy storage battery 3 and the converter power module 2 in the energy storage compartment 1.

[0123] Furthermore, the internal cooling medium connection pipelines include a main supply pipeline for the energy storage battery, a main return pipeline for the energy storage battery, a main supply pipeline for the converter power module, and a main return pipeline for the converter power module. The cooling medium inlet of each energy storage battery 3 is connected to the main supply pipeline for the energy storage battery, and the cooling medium outlet is connected to the main return pipeline for the energy storage battery, thereby forming separate cooling branches for the energy storage battery. When more than two cooling branches for the energy storage battery are provided, they are connected in parallel.

[0124] Furthermore, the radiator inlet of each converter power module 2 is connected to the converter power module liquid supply main pipeline, and the radiator outlet is connected to the converter power module liquid return main pipeline, thus forming a converter power module cooling branch. When more than two converter power module cooling branches are provided, they are connected in parallel. Through the parallel arrangement of similar cooling branches, each energy storage battery 3 and each converter power module 2 can obtain cooling medium from their corresponding liquid supply and return main pipelines.

[0125] Furthermore, the main liquid supply line of the energy storage battery is connected to the first liquid supply interface of the refrigeration unit, and the main liquid return line of the energy storage battery is connected to the inlet of the three-way regulating valve 8; the three-way regulating valve 8 is connected to the inlet of the water mixing tank 9 via the first liquid supply branch A, and the outlet of the water mixing tank 9 is connected to the main liquid supply line of the converter power module; the main liquid return line of the converter power module is connected to the second return branch D and the second liquid supply branch B respectively.

[0126] Therefore, at least a portion of the cooling medium flowing out from the energy storage battery cooling branch sequentially passes through the energy storage battery return main pipeline, the three-way regulating valve 8, the first liquid supply branch A, and the water mixing tank 9 into the converter power module cooling branch. This creates a series cooling relationship between the energy storage battery cooling section (composed of the energy storage battery cooling branch) and the converter power module cooling section (composed of the converter power module cooling branch) in the overall cooling medium circulation path. This series relationship represents the sequential relationship between the two cooling sections in the overall circulation direction and does not alter the parallel relationships between the energy storage battery cooling branches and between the converter power module cooling branches.

[0127] Furthermore, such as Figure 3 and Figure 4 As shown, each energy storage battery 3 is arranged adjacent to its corresponding converter power module 2 on the left and right sides, and is arranged in the same compartment and at the same potential. By shortening the physical distance between the corresponding energy storage battery 3 and the converter power module 2, the high-voltage electrical connection path can be shortened accordingly.

[0128] Furthermore, the n energy storage batteries 3 are arranged in rows, with each row including two energy storage batteries 3 arranged vertically and two corresponding converter power modules 2. The high-voltage box output port of the energy storage battery 3 and the input terminal of the frequency doubler filter circuit of the corresponding converter power module 2 are arranged in the same direction to reduce the back-and-forth of the high-voltage connection lines inside the compartment. Figure 2 The electrical connection between the energy storage battery 3 and the converter power module 2 is shown.

[0129] Furthermore, the main supply pipeline and the main return pipeline of the energy storage battery constitute the main water pipe group for the cooling medium of the energy storage battery, and the main supply pipeline and the main return pipeline of the converter power module constitute the main water pipe group for the cooling medium of the converter power module. The two main water pipe groups are arranged back to back. Figure 3 and Figure 4 The arrangement shown reduces the crossing between the two types of cooling pipes and facilitates zoned installation.

[0130] Working principle During operation of the integrated water-cooled unit, the first liquid supply interface supplies cooling medium to the main liquid supply line of the energy storage battery. Each energy storage battery cooling branch receives the cooling medium and cools its corresponding energy storage battery 3. The cooling medium flowing out of each energy storage battery cooling branch merges into the energy storage battery return liquid main line and then enters the three-way regulating valve 8. At least a portion of the cooling medium enters the water mixing tank 9 via the first liquid supply branch A, and after mixing, it is supplied to each converter power module cooling branch by the converter power module supply line. The cooling medium after heat exchange in each converter power module 2 merges into the converter power module return liquid main line and connects to the second return branch D and the second liquid supply branch B to complete the main circulation return and mixing return.

[0131] In summary, this embodiment achieves parallel cooling relationships between multiple energy storage batteries 3 and multiple converter power modules 2 by coordinating the cooling branches of the energy storage batteries, the cooling branches of the converter power modules, and the cooling medium connection pipes within the storage compartment. It also establishes a series cooling relationship between the cooling sections of the energy storage batteries and the cooling sections of the converter power modules in the overall cooling medium circulation path. Furthermore, by combining the adjacent equipment with the same potential arrangement and the back-to-back arrangement of the main water pipe groups, the cooling medium circulation path and equipment connection relationships within the energy storage compartment 1 are made clearer.

[0132] Example 5 Reference Figure 1 , Figure 3 and Figure 4 This is the fifth embodiment of the present invention. Based on the above embodiments, this embodiment further explains the expansion and adjustment methods of the integrated water-cooled unit and its layout structure under different energy storage capacities and different operating conditions.

[0133] When the energy storage system capacity changes, the value of n can be adjusted while ensuring the liquid supply capacity of the integrated water-cooled unit and the space conditions of the energy storage compartment 1. When n is 1, one energy storage battery cooling branch and one converter power module cooling branch are set up; when n is greater than or equal to 2, the energy storage battery cooling branches and the converter power module cooling branches are kept in parallel, while the energy storage battery cooling section and the converter power module cooling section are still kept in series on the overall cooling medium circulation path. In this way, the number of energy storage batteries 3 and converter power modules 2 can be expanded while keeping the basic circulation topology unchanged.

[0134] Under different heat load conditions, the controller can adjust the three-way regulating valve 8, the regulating valve and the auxiliary water pump 7 according to the detection results of the first temperature sensor, the first flow sensor and the second temperature sensor, so as to change the flow rate of the cooling medium entering the water storage mixing tank 9 through the first liquid supply branch A and the flow rate of the cooling medium returning to the water storage mixing tank 9 through the second liquid supply branch B; when it is necessary to increase the inlet cooling medium temperature of the converter power module 2, the controller can also control the electric heater 10 to work.

[0135] When the ambient humidity in the energy storage compartment 1 is high and the inlet cooling medium temperature of the converter power module 2 is close to the anti-condensation temperature limit, the controller can increase the outlet cooling medium temperature of the water mixing tank 9 according to the detection results of the environmental detection unit. When the heat dissipation load of the converter power module 2 increases, the cooling medium flow rate and mixing ratio can be adjusted accordingly so that the converter power module 2 obtains a cooling medium that meets the heat dissipation requirements.

[0136] During the engineering layout, the number of rows of energy storage batteries 3 and converter power modules 2, as well as the extension length of the main pipeline, can be adjusted according to the length, width and maintenance access requirements of the energy storage compartment 1. However, the adjacent and same potential relationship between the energy storage batteries 3 and the corresponding converter power modules 2, the parallel relationship of the same type of cooling branches, the overall series relationship of the two cooling sections, and the back-to-back arrangement of the two main water pipe groups should be maintained.

[0137] In this embodiment, the cooling medium can be selected according to the insulation, heat exchange, and long-term circulating operation requirements of the energy storage system. The main water pump 5 provides the main circulation power, the degassing tank 6 is used for gas-liquid separation of the main circulation cooling medium, the auxiliary water pump 7 provides the return power for the second liquid supply branch B, the three-way regulating valve 8 is used to distribute the cooling medium at the outlet of the energy storage battery 3, the water mixing tank 9 is used to mix cooling media from different sources, the electric heater 10 is used to assist in heating the cooling medium in the water mixing tank 9 when necessary, and the ion exchanger 11 is used for media treatment in the ion exchange branch; the refrigeration unit 12 works in conjunction with the water-air heat exchanger 13 to cool the cooling medium, and the condenser 14, high-pressure water tank 15, filter 16, and evaporator 17 are configured according to... Figure 1 The refrigerant circulation path shown is configured such that filter 16 is located between high-pressure water tank 15 and evaporator 17.

[0138] In summary, this invention enables the energy storage battery 3 and the converter power module 2 to share a cooling system through the cooperation between the integrated water-cooled unit and the energy storage compartment 1. The cooling medium state at the inlet of the converter power module 2 is regulated by the cooperation of the water mixing tank 9, the three-way regulating valve 8, the regulating valve and the auxiliary water pump 7. At the same time, the system integration and expansion convenience are improved by parallel connection of similar branches, series connection of the two cooling sections and compact internal layout.

[0139] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and all such modifications and improvements should fall within the protection scope of the present invention.

Claims

1. A water-cooled integrated unit for a high-pressure chain-type direct-connected energy storage compartment, characterized in that, It includes a refrigeration unit, a main water pump (5), a degassing tank (6), an auxiliary water pump (7), a three-way regulating valve (8), a water storage mixing tank (9), and cooling medium pipelines; The cooling medium pipeline includes a first liquid supply branch (A), a second liquid supply branch (B), a first return branch (C), and a second return branch (D); The cooling medium outlet of the refrigeration unit forms a first liquid supply interface, which is used to connect with the cooling medium inlet of the energy storage battery (3). The inlet of the three-way regulating valve (8) is used to connect with the cooling medium outlet of the energy storage battery (3). The first outlet of the three-way regulating valve (8) is connected to the degassing tank (6) via the first return branch (C). The second outlet of the three-way regulating valve (8) is connected to the inlet of the water mixing tank (9) via the first liquid supply branch (A). The outlet of the water mixing tank (9) is used to connect with the radiator inlet of the converter power module (2); The second return branch (D) and the second liquid supply branch (B) are both used to connect to the radiator outlet of the converter power module (2). The second return branch (D) is connected to the degassing tank (6) via a check valve. The second liquid supply branch (B) is connected to the inlet of the water storage mixing tank (9) via the auxiliary water pump (7). The outlet of the degassing tank (6) is connected to the cooling medium inlet of the refrigeration unit via the main water pump (5).

2. The high-pressure chain-type direct-connection energy storage compartment water-cooled integrated unit according to claim 1, characterized in that, The refrigeration unit includes a water-air heat exchanger (13) and an evaporator (17); the water outlet of the water-air heat exchanger (13) is connected to the water inlet of the evaporator (17), and the water outlet of the evaporator (17) forms the first liquid supply interface.

3. A water-cooled integrated unit for a high-pressure chain-type direct-connected energy storage compartment according to claim 1, characterized in that, The water mixing tank (9) is equipped with an electric heater (10), and the top of the water mixing tank (9) is equipped with an exhaust valve and the bottom is equipped with a drain valve.

4. A water-cooled integrated unit for a high-pressure chain-type direct-connected energy storage compartment according to claim 1, characterized in that, A first temperature sensor, a first pressure sensor, and a first flow sensor are installed on the pipeline between the outlet of the water mixing tank (9) and the radiator inlet of the converter power module (2).

5. A water-cooled integrated unit for a high-pressure chain-type direct-connected energy storage compartment according to claim 4, characterized in that, The power converter module (2) has a second temperature sensor and a second pressure sensor installed on the pipeline on the heat sink outlet side.

6. A water-cooled integrated unit for a high-pressure chain-type direct-connected energy storage compartment according to claim 5, characterized in that, It also includes a controller, an electric heater (10) installed in the water mixing tank (9), and an environmental detection unit for detecting the ambient temperature and humidity inside the energy storage compartment (1); the controller is connected to the environmental detection unit, the electric heater (10), the first temperature sensor and the second temperature sensor respectively.

7. A water-cooled integrated unit for a high-pressure chain-type direct-connected energy storage compartment according to claim 6, characterized in that, The controller is connected to the three-way regulating valve (8) and the auxiliary water pump (7) respectively.

8. A water-cooled integrated unit for a high-pressure chain-type direct-connected energy storage compartment according to claim 1, characterized in that, The first liquid supply interface is connected to an ion exchange branch, and the ion exchange branch is provided with a flow indicator, an ion exchanger (11) and a filter element in sequence along the flow direction of the cooling medium.

9. A layout structure for a high-pressure chain-type direct-connected energy storage compartment using an integrated water-cooled unit, characterized in that, It includes an energy storage compartment (1), a high-voltage chain-type direct-connected energy storage compartment water-cooled integrated machine as described in any one of claims 1 to 8, n energy storage batteries (3), n converter power modules (2), and internal cooling medium connection pipelines, wherein n is an integer greater than or equal to 1; The internal cooling medium connection pipeline includes the energy storage battery liquid supply main pipeline, the energy storage battery liquid return main pipeline, the converter power module liquid supply main pipeline, and the converter power module liquid return main pipeline. The cooling medium inlet of each of the energy storage batteries (3) is connected to the main liquid supply pipeline of the energy storage battery, and the cooling medium outlet is connected to the main liquid return pipeline of the energy storage battery, so as to form a cooling branch of the energy storage battery; when there are two or more cooling branches of the energy storage battery, the cooling branches of the energy storage battery are connected in parallel. The radiator inlet of each of the converter power modules (2) is connected to the liquid supply main pipeline of the converter power module, and the radiator outlet is connected to the liquid return main pipeline of the converter power module, so as to form a cooling branch of the converter power module; when there are two or more cooling branches of the converter power module, the cooling branches of the converter power module are connected in parallel. The main liquid supply line of the energy storage battery is connected to the first liquid supply interface, and the main liquid return line of the energy storage battery is connected to the inlet of the three-way regulating valve (8); the three-way regulating valve (8) is connected to the inlet of the water mixing tank (9) via the first liquid supply branch (A), and the outlet of the water mixing tank (9) is connected to the main liquid supply line of the converter power module; the main liquid return line of the converter power module is connected to the second return branch (D) and the second liquid supply branch (B) respectively. At least a portion of the cooling medium flowing out of the energy storage battery cooling branch enters the converter power module cooling branch in sequence through the energy storage battery return main pipeline, the three-way regulating valve (8), the first liquid supply branch (A), and the water mixing tank (9), so that the energy storage battery cooling section formed by the energy storage battery cooling branch and the converter power module cooling section formed by the converter power module cooling branch form a series cooling relationship in the overall cooling medium circulation path.

10. The arrangement structure of a high-pressure chain-type direct-connected energy storage compartment with an integrated water-cooled unit according to claim 9, characterized in that, Each energy storage battery (3) is arranged adjacent to the corresponding converter power module (2) on the left and right, and the energy storage battery (3) and the corresponding converter power module (2) are arranged in the same compartment and at the same potential.

11. The arrangement structure of a high-pressure chain-type direct-connected energy storage compartment with a water-cooled integrated unit according to claim 10, characterized in that, n energy storage batteries (3) are arranged in rows, each row including two energy storage batteries (3) arranged vertically and two corresponding converter power modules (2); the high voltage box output port of the energy storage battery (3) and the double frequency filter circuit input terminal of the corresponding converter power module (2) face the same direction.

12. The arrangement structure of a high-pressure chain-type direct-connected energy storage compartment with an integrated water-cooled unit according to claim 9, characterized in that, The main supply pipeline for the energy storage battery and the main return pipeline for the energy storage battery constitute the main water pipe group for the cooling medium of the energy storage battery. The main supply pipeline for the power module of the converter and the main return pipeline for the power module of the converter constitute the main water pipe group for the cooling medium of the power module of the converter. The main water pipe group for the cooling medium of the energy storage battery and the main water pipe group for the cooling medium of the power module of the converter are arranged back to back.

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