Energy storage converter

Abstract

The invention relates to the technical field of converters. In view of the problem of poor heat dissipation of an energy storage converter in the related technology, the invention provides an energy storage converter, which comprises a cabinet having a first installation area and a second installation area which are oppositely arranged; the first mounting area and the second mounting area are provided with air ducts which are communicated with each other; the functional component is arranged in the first mounting area; the power module is arranged in the second mounting area; the liquid cooling plate is arranged on the power module so as to cool the power module; the liquid air heat exchanger is arranged in the first mounting area; the liquid air heat exchanger is connected with the liquid cooling plate and forms an air cooling circulation loop with the air duct; and the fan is arranged in the first mounting area and is used for driving air in the air duct to flow. According to the energy storage converter, mutual interference between the power module and the functional assembly can be avoided, so that the working environment of the energy storage converter is improved, and the energy storage converter works more smoothly; and meanwhile, a modular layout mode is adopted, so that the overall heat dissipation effect is better.

Description

Technical Field

[0001] The present application relates to the technical field of converters, and in particular to an energy storage converter. Background Art

[0002] With the continuous development of distributed power generation technology and the increase in the scale of new energy power generation, in order to improve the output characteristics of the electric field, many researchers have configured energy storage systems in the distribution network to improve the grid-connected capacity of new energy sources such as wind power and photovoltaic power generation. The energy storage system can achieve peak shaving and valley filling, that is, the energy storage system absorbs the excess electric energy in the system for storage when the load is low, and releases the stored electric energy to the system at peak load, thereby effectively eliminating the peak-to-valley difference between day and night. In this way, on the one hand, it ensures the reliability of power supply and the stability of operation, and ensures good voltage quality. On the other hand, it also solves the problem of large investment in traditional transmission lines to meet peak loads.

[0003] The core equipment of the energy storage system is the energy storage inverter, which mainly controls the charging and discharging process and performs AC-DC conversion. At present, the modules of the energy storage inverter are usually arranged in multiple rows and columns in the control cabinet. The modules are prone to mutual interference, which is not conducive to the heat dissipation of the entire equipment and easily affects the normal use of the equipment. Summary of the invention

[0004] In order to solve the problem of poor heat dissipation of the energy storage converter in the above-mentioned related art, the present application aims to propose an energy storage converter.

[0005] In view of this, the present application proposes an energy storage inverter, comprising: a cabinet, having a first installation area and a second installation area arranged relatively, the first installation area and the second installation area being provided with mutually connected air ducts; a functional component, arranged in the first installation area; a power module, arranged in the second installation area; a liquid cooling plate, arranged in the power module to cool the power module; a liquid-to-air heat exchanger, arranged in the first installation area, the liquid-to-air heat exchanger and the liquid cooling plate are connected to form a heat exchange cycle, and the liquid-to-air heat exchanger is also connected to the air duct to form an air cooling circulation loop; a fan, arranged in the first installation area, for driving the air flow in the air duct.

[0006] In the energy storage inverter, the power module is the core heat-generating component. In the above technical solution of the present application, on the one hand, the functional components with less power consumption and the power modules with greater power consumption are respectively arranged in the first installation area and the second installation area, which optimizes the spatial layout, makes the structure of the energy storage inverter more compact, and has high space utilization, and can avoid mutual interference between the power module and the functional components, which is conducive to improving the working environment of the energy storage inverter and making the energy storage inverter work more smoothly; at the same time, the modular layout method is adopted, which makes assembly and maintenance more convenient, and makes the overall heat dissipation effect better. On the other hand, the cooling method and thermal management layout are optimized, and the air-cooled cycle is formed by the fan driving the spatial flow in the air duct, and the mixed cooling of air cooling and liquid cooling is realized in conjunction with the liquid cooling plate, which improves the overall heat dissipation effect of the energy storage inverter, so that each module of the energy storage inverter works under suitable environmental conditions, ensuring the smooth operation of the energy storage inverter.

[0007] In some technical schemes, the energy storage inverter also includes a shunt unit; the shunt unit is connected to the liquid-air heat exchanger or the liquid cooling plate; the shunt unit includes: a water inlet splitter block, which is arranged in the first installation area, and the water inlet splitter block is connected to the liquid cooling plate water inlet pipe or the heat exchanger water inlet pipe; a water outlet water collecting block, which is arranged in the first installation area, and the water outlet water collecting block is connected to the liquid cooling plate return pipe or the heat exchanger return pipe.

[0008] In the above technical solution, the water is diverted through the water inlet splitter block to provide sufficient heat exchange for multiple groups of liquid cooling plates and liquid-to-air heat exchangers, and the entire energy storage inverter adopts an external circulation + internal circulation method to dissipate heat. Among them, the internal circulation allows the internal air of the entire energy storage inverter to circulate fully through the air duct, while the external circulation supplies water in a specific temperature range to the water inlet splitter block from the outside, and takes away the heat of the entire machine, thereby achieving heat dissipation. Furthermore, the pressure sensor can monitor the pressure of the coolant in the pipeline in real time. This is crucial to ensure the stable operation of the equipment, because excessive pressure may cause pipeline rupture or equipment damage, while too low pressure may affect the cooling effect.

[0009] In some technical solutions, optionally, the diversion unit also includes a pressure detection element and / or a temperature detection element; the pressure detection element and the temperature detection element are arranged at the water inlet end of the water inlet splitting block and the water outlet end of the water outlet collecting block.

[0010] In actual applications, water is delivered to the diversion unit through an external water supply machine, and the upper computer calculates the pressure difference between the water inlet end and the water outlet end by reading the pressure at the water inlet end of the water inlet splitter block and the water outlet end of the water outlet collection block. In this way, when the pressure difference is greater than the preset pressure threshold, the operation is maintained. If the pressure difference is less than or equal to the preset pressure threshold, an acceleration command is issued to the outside to control the external water supply machine pump to increase the speed so that the pressure difference between the water inlet end and the water outlet end reaches the preset pressure threshold; and when the temperature of the water inlet end of the water inlet splitter block is less than the preset temperature threshold, the operation is maintained. If the temperature of the water inlet end of the water inlet splitter block is greater than or equal to the preset temperature threshold, a cooling command is issued to the outside to control the external water supply machine to increase the cooling power to reduce the temperature of the water inlet end of the water inlet splitter block. These two work together to ensure the stable operation of the equipment.

[0011] In some technical solutions, the energy storage converter can optionally further include: a DC capacitor, which is arranged in the second installation area and is used to provide DC side energy; and a laminated busbar, which connects the DC capacitor and the power module. In this way, the DC capacitor can provide a certain voltage support function to keep the DC side voltage stable, and on the other hand, it can also filter harmonics to a certain extent, thereby helping to improve the stability of the entire device operation.

[0012] In some technical solutions, optionally, the functional components include: a DC protection unit; the DC protection unit is connected to the power module to control the on and off of the DC side and provide DC overcurrent protection; and / or, an AC protection unit, the AC protection unit is connected to the power module to control the on and off of the AC side and provide AC overcurrent protection, thereby helping to improve the reliability and stability of the entire device.

[0013] In the above technical solution, optionally, the DC protection unit includes: a DC fuse, arranged in the first installation area; a DC contactor, connecting the DC fuse and the DC capacitor; an isolating switch, connected to the DC fuse; and an isolating switch operating handle, connected to the isolating switch to control the opening or closing of the isolating switch.

[0014] In the above technical solution, the DC fuse is used for overcurrent and short-circuit protection, and can be quickly disconnected when the fuse is overloaded; the isolating switch is used to achieve DC isolation and DC protection, and plays a load disconnection function to avoid abnormalities, especially emergency situations such as battery thermal runaway, communication loss and uncontrolled energy storage inverter. Regardless of whether the energy storage inverter is under full load or other load conditions, the connection between the battery pack and the energy storage inverter can be quickly cut off, thereby making the system design more flexible and the control more convenient and rapid.

[0015] In some technical solutions, the DC protection unit may further include a DC magnetic ring, which connects the isolating switch and the isolating switch operating handle. The DC magnetic ring forms electromagnetic isolation and protection, which can provide a safety barrier for the isolating switch, thereby helping to improve the stability and reliability of the entire device.

[0016] In some technical solutions, optionally, the DC protection unit also includes: a DC power supply, arranged in the first installation area, for providing energy to the DC capacitor; a pre-charge resistor, connected to the DC power supply; and a DC relay, connecting the DC power supply and the pre-charge resistor.

[0017] In the above technical solution, the initial charging current is limited by setting a pre-charging resistor, so as to slowly increase the voltage of the DC capacitor, thereby effectively avoiding instantaneous current shocks and helping to increase the service life of the DC capacitor.

[0018] In the above technical solution, optionally, the AC protection unit includes: an AC circuit breaker; an AC circuit breaker connected to a power module; and / or an AC filter capacitor, which is arranged in the first installation area.

[0019] When an abnormal situation occurs, the AC circuit breaker can quickly cut off the circuit to protect the equipment from damage, thus ensuring the safe, reliable and stable operation of the entire equipment. The AC filter capacitor can filter out the harmonics on the AC side to improve the reliability and stability of the energy storage converter.

[0020] In some technical solutions, optionally, the energy storage converter further includes: an AC capacitor, which is arranged in the second installation area; an AC filter, which connects the power module and the AC capacitor; and an absorption capacitor, which connects the AC filter and the AC capacitor.

[0021] In the above technical solution, the AC capacitor can provide a certain voltage support on the one hand, and on the other hand, work with the AC filter to filter out the harmonics on the AC side, thereby helping to improve the stability of equipment operation.

[0022] Additional aspects and advantages of the present application will become apparent in the following description or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 One of the structural schematic diagrams of the energy storage converter in the embodiment of the present application is shown; Figure 2 The second structural schematic diagram of the energy storage converter in the embodiment of the present application is shown; Figure 3The third structural schematic diagram of the energy storage converter in the embodiment of the present application is shown; Figure 4 A fourth structural schematic diagram of the energy storage converter in an embodiment of the present application is shown; Figure 5 A schematic diagram showing the structure of an operation panel in an embodiment of the present application is shown; Figure 6 The fifth structural diagram of the energy storage converter in the embodiment of the present application is shown; Figure 7 A schematic structural diagram of a flow diversion unit in an embodiment of the present application is shown; Figure 8 One of the flow charts of the water supply control method in the embodiment of the present application is shown; Fig. 9 The second flow chart of the water supply control method in the embodiment of the present application is shown.

[0024] in, Figures 1 to 7 The corresponding relationship between the reference numerals and the component names is as follows: 100-cabinet; 110-first installation area; 120-second installation area; 130-air duct; 131-first air duct; 132-second air duct; 133-third air duct; 134-fourth air duct; 140-operation panel; 141-signal interface; 142-coolant inlet; 143-coolant outlet; 150-travel unit; 200-functional components; 210-DC protection unit; 211-DC fuse; 212-DC contactor; 213-isolating switch; 214-isolating switch operating handle; 215-DC magnetic ring; 216-DC power supply; 217-pre-charging resistor; 218-DC relay; 219-DC filter capacitor; 220-AC protection unit; 221-AC circuit breaker; 222-AC filter capacitor; 230-lightning arrester; 300-power module; 400-Liquid cooling plate; 500- fan; 600-liquid-air heat exchanger; 610-diversion unit; 611-water inlet block; 6111-water inlet end; 612-liquid cooling plate water inlet pipe; 613-liquid cooling plate return pipe; 614-heat exchanger water inlet pipe; 615-heat exchanger return pipe; 616-water outlet water collecting block; 6161-water outlet end; 617-pressure detection element; 618-temperature detection element; 700-DC capacitor; 710-laminated busbar; 800-AC capacitor; 810-AC filter; 820-absorption capacitor; 900 - Current sensor. DETAILED DESCRIPTION

[0025] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0027] Combine the following Figures 1 to 9 , the energy storage converter provided in the embodiment of the present application is described in detail through specific embodiments and their application scenarios.

[0028] Reference Figure 1 , Figure 2 and Figure 3 Some embodiments of the present application disclose an energy storage converter, the structure of which includes: a cabinet 100, a functional component 200, a power module 300, a liquid cooling plate 400, a fan 500 and a liquid-to-air heat exchanger 600.

[0029] Specifically, the cabinet 100 has a first installation area 110 and a second installation area 120 arranged opposite to each other, and the first installation area 110 and the second installation area 120 are provided with mutually connected air ducts 130. The functional component 200 is arranged in the first installation area 110. The power module 300 is arranged in the second installation area 120. The liquid cooling plate 400 is arranged in the power module 300 to cool the power module 300. The liquid-to-air heat exchanger 600 is arranged in the first installation area 110; the liquid-to-air heat exchanger 600 is connected to the liquid cooling plate 400 to form a heat exchange cycle, and the liquid-to-air heat exchanger 600 is connected to the air duct 130 to form an air cooling circulation loop. The fan 500 is arranged in the first installation area 110, and is used to drive the air flow in the air duct 130.

[0030] When the fan 500 is blowing, it can drive the air flow in the air duct 130, so that the air with heat is sent into the liquid-to-air heat exchanger 600 to exchange heat with the low-temperature liquid, and then the cooled air is sent into the air duct 130 again.

[0031] In the energy storage converter, the power module 300 is the core heat generating component. In the above embodiment of the present application, on the one hand, the functional component 200 with less power consumption and the power module 300 with greater power consumption are respectively arranged in the first installation area 110 and the second installation area 120, which optimizes the spatial layout, makes the structure of the energy storage converter more compact, and has high space utilization, and can avoid mutual interference between the power module 300 and the functional component 200, thereby helping to improve the working environment of the energy storage converter and make the work of the energy storage converter smoother; at the same time, the modular layout method is adopted, which makes assembly and maintenance more convenient, and makes the overall heat dissipation effect better. On the other hand, the cooling method and thermal management layout are optimized, and the air flow in the air duct 130 is driven by the fan 500 to form an air cooling cycle, and the liquid cooling plate 400 is used to achieve mixed cooling of air cooling and liquid cooling, which improves the overall heat dissipation effect of the energy storage converter, so that each module of the energy storage converter works under suitable environmental conditions, ensuring the smooth operation of the energy storage converter.

[0032] In some embodiments, the air duct 130 includes a first air duct 131, a second air duct 132, a third air duct 133, and a fourth air duct 134. Specifically, the functional component 200, the power module 300, and the top space of the cabinet 100 form the first air duct 131, the functional component 200, the power module 300, and the bottom space of the cabinet 100 cooperate to form the second air duct 132, the front of the cabinet 100 and the functional component 200 cooperate to form the third air duct 133 connecting the first air duct 131 and the second air duct 132, and the rear of the cabinet 100 and the power module 300 cooperate to form the fourth air duct 134 connecting the first air duct 131 and the second air duct 132.

[0033] In the above embodiment, the first air duct 131, the second air duct 132, the third air duct 133 and the fourth air duct 134 form an internal air circulation loop (the air flow direction is as follows): Figure 3 This vertical layered air duct design allows the air inside the energy storage converter to flow fully.

[0034] In actual application, the fan 500 and the liquid-to-air heat exchanger 600 are arranged in the second air duct 132, and the liquid-to-air heat exchanger 600 is connected to the liquid cooling plate 400 to form a heat exchange cycle. At the same time, through the cooperation between the liquid cooling plate 400 and the fan 500, the air in the air duct 130 is fully cooled in the liquid-to-air heat exchanger 600 and then circulates to form an air cooling circulation loop, optimizing the cooling method and thermal management layout, so that all components of the energy storage converter are fully cooled, and the components inside the cabinet 100 work under suitable environmental conditions, effectively avoiding power reduction caused by temperature changes.

[0035] Reference Figure 7In some embodiments, there are multiple groups of liquid cooling plates 400 and liquid-to-air heat exchangers 600. Therefore, the energy storage inverter further includes a shunt unit 610, which is connected to the liquid cooling plate 400 or the liquid-to-air heat exchanger 600.

[0036] The flow dividing unit 610 includes an inlet water dividing block 611 and an outlet water collecting block 616. Specifically, the inlet water dividing block 611 is arranged in the second air duct 132 of the first installation area 110, and is connected to the liquid cooling plate inlet pipe 612 or the heat exchanger inlet pipe 614. The outlet water collecting block 616 is arranged in the second air duct 132 of the first installation area 110, and is connected to the liquid cooling plate return pipe 613 or the heat exchanger return pipe 615. That is, the flow is divided through the inlet water dividing block 611, so that multiple groups of liquid cooling plates 400 and liquid-to-air heat exchangers 600 can fully exchange heat.

[0037] In the above embodiment, the water inlet splitter block 611 is used for diversion so as to provide sufficient heat exchange for multiple groups of liquid cooling plates 400 and liquid-to-air heat exchangers 600, and the entire energy storage converter adopts an external circulation + internal circulation method for heat dissipation. The internal circulation allows the internal air of the entire energy storage converter to circulate fully through the air duct 130, while the external circulation supplies water of a specific temperature range to the water inlet splitter block 611 through an external water supply machine, and takes away the heat of the entire machine, thereby achieving heat dissipation.

[0038] Reference Figure 7 In the above embodiment, the water inlet end 6111 of the water inlet splitter block 611 and the water outlet end 6161 of the water outlet water collecting block 616 are provided with a pressure detection element 617 (such as Figure 7 The pressure detection element 617 can monitor the pressure of the coolant in the pipeline in real time. This is crucial to ensure the stable operation of the equipment, because too high pressure may cause pipeline rupture or equipment damage, while too low pressure may affect the cooling effect.

[0039] In actual applications, the diversion unit 610 is connected to an external water supply machine, and the pressures of the water inlet end 6111 of the water inlet splitting block 611 and the water outlet end 6161 of the water outlet collecting block 616 are read by the upper computer, thereby calculating the pressure difference between the water inlet end 6111 and the water outlet end 6161. Subsequently, it is determined whether the pressure difference is greater than a preset pressure threshold. If so, the operation is maintained. If not, an acceleration command is issued to the outside to control the external water supply machine pump to increase the speed so that the pressure difference between the water inlet end 6111 and the water outlet end 6161 reaches the preset pressure threshold, thereby ensuring stable operation of the equipment.

[0040] Reference Figure 7 In the above embodiment, the water inlet end 6111 of the water inlet splitter block 611 and the water outlet end 6161 of the water outlet water collecting block 616 are provided with a temperature detection element 618 (such as Figure 7The T in the figure is used to monitor the temperature of the coolant in the pipeline in real time.

[0041] In actual applications, the temperature is read by the host computer, and it is determined whether the temperature of the water inlet end 6111 of the water inlet splitter block 611 is less than the preset temperature threshold. If so, the operation is maintained; if not, a cooling command is issued to the outside to control the external water supply machine to increase the cooling power to reduce the temperature of the water inlet end 6111 of the water inlet splitter block 611, thereby ensuring the stable operation of the equipment.

[0042] In practical applications, the pressure detection element 617 is a pressure sensor, and the temperature detection element 618 is a temperature sensor.

[0043] The diversion unit 610 is connected to an external water supply machine, see Figure 8 , the water supply control method of the diversion unit specifically includes: S100, the host computer reads pressure and temperature; S102, judging the water inlet temperature value; Determine whether T is less than T1, where T is the temperature of the water inlet and T1 is the preset temperature threshold; S104, if yes, maintain operation; S106, if not, a cooling instruction is issued to the water dispenser; S108, the water supply machine increases the cooling power.

[0044] Reference Fig. 9 , the water supply control method of the diversion unit specifically includes: S200, the host computer reads pressure and temperature; S202, calculating the pressure difference between the water inlet and the water outlet; S204, judging whether δP is greater than P1; Among them, δP is the pressure difference between the water inlet and the water outlet, and P1 is the preset pressure threshold; S206, if yes, maintain operation; S208, if not, sending an acceleration instruction to the water dispenser; S210, the water supply machine pump speed increases.

[0045] In the above embodiment, a temperature detection element 618 and / or a pressure detection element 617 may be provided on each branch of the water inlet splitter block 611 and the water outlet water collecting block 616. In this way, by monitoring the pressure and temperature of each branch, the entire diversion unit 610 can be fully monitored, which helps to timely discover and handle local abnormalities, thereby avoiding the expansion of problems.

[0046] In some embodiments, a plurality of liquid cooling pipes with different pipe diameters are arranged between the water inlet splitter block 611 and the water outlet water collecting block 616 to form a plurality of heat dissipation branches, so that liquid cooling pipes with corresponding pipe diameters can be arranged at different spatial positions inside the equipment according to the degree of heat generation at different positions inside the energy storage converter cabinet 100 to form different heat dissipation branches, such as using a liquid cooling pipe with a larger pipe diameter in an area with a large heat generation to increase the flow rate and heat dissipation area of ​​the cooling liquid; and using a liquid cooling pipe with a smaller pipe diameter in an area with a small heat generation to save materials and space; and using the liquid cooling plate 400 or the liquid-air heat exchanger 600 to ensure that the coolant can maintain a low temperature during the circulation process, thereby effectively taking away the heat inside the cabinet 100. The combination of liquid cooling pipes with different pipe diameters and thicknesses can better adapt to the complex spatial structure inside the cabinet, and achieve an optimal balance between the heat dissipation effect and the spatial layout; such a design can avoid the problem of space waste or insufficient heat dissipation caused by using a single specification liquid cooling pipe in the traditional solution. In addition, this design can flexibly adjust the layout and specifications of the liquid cooling pipes according to actual needs, providing more convenient conditions for the installation and maintenance of equipment inside the cabinet 100, so as to adapt to various different cabinet 100 structures and equipment layouts. At the same time, it achieves the overall lightweight of the equipment to a certain extent.

[0047] In some embodiments, the energy storage converter further includes a DC capacitor 700 and a laminated busbar 710. Specifically, the DC capacitor 700 is disposed in the second installation area 120 and is located on the side of the power module 300 away from the first installation area 110, and is used to provide DC side energy. The laminated busbar 710 connects the DC capacitor 700 and the power module 300. In this way, the DC capacitor 700 can provide a certain voltage support effect on the one hand, so that the DC side voltage remains stable, and on the other hand, it can also filter out harmonics to a certain extent, thereby helping to improve the stability of the operation of the entire device.

[0048] In the above embodiment, the input side and the output side of the DC capacitor 700 are arranged vertically. On the one hand, the vertical arrangement can effectively utilize the space in the second mounting area 120, reduce the horizontal occupation, and make the entire layout more compact. On the other hand, such a design can also make the connection relationship with other components more flexible.

[0049] In some embodiments, the functional component 200 includes a DC protection unit 210, which is connected to the power module 300 to control the on and off of the DC side and provide DC overcurrent protection. In this way, in the event of an abnormality, whether the energy storage converter is under full load or other load conditions, the connection between the battery pack and the energy storage converter can be quickly cut off, thereby making the system design more flexible, the cost solution more optimal, and the control more convenient and rapid, thereby helping to improve the reliability and stability of the entire device.

[0050] Reference Figure 1 , Figure 4 and Figure 5 In some embodiments, the DC protection unit 210 includes a DC fuse 211, a DC contactor 212, an isolating switch 213, and an isolating switch operating handle 214. The DC fuse 211 is disposed in the first installation area 110; the DC contactor 212 connects the DC fuse 211 and the DC capacitor 700; the isolating switch 213 is connected to the DC fuse 211; the isolating switch operating handle 214 is disposed on the operation panel 140 of the cabinet 100 and connected to the isolating switch 213 to control the opening or closing of the isolating switch 213.

[0051] In actual application, the DC contactor 212 is connected to the DC capacitor 700 and the DC fuse 211 through a copper busbar; the isolating switch 213 is connected to the DC fuse 211 through a copper busbar.

[0052] In the above embodiment, the DC fuse 211 is used for overcurrent and short-circuit protection, and can be quickly disconnected when the fuse is overloaded; the isolating switch 213 is used to achieve DC isolation and DC protection, and plays a load disconnection function to avoid abnormalities, especially emergency situations such as battery thermal runaway, communication loss and uncontrolled energy storage inverter. Regardless of whether the energy storage inverter is under full load or other load conditions, the connection between the battery pack and the energy storage inverter can be quickly cut off, thereby making the system design more flexible and the control more convenient and rapid.

[0053] In some embodiments, the DC protection unit 210 further includes a DC magnetic ring 215. The DC magnetic ring 215 connects the isolating switch 213 and the isolating switch operating handle 214. The DC magnetic ring 215 forms electromagnetic isolation and protection, which can provide a safety barrier for the isolating switch 213, thereby helping to improve the stability and reliability of the entire device.

[0054] Reference Figure 1 and Figure 2 In some embodiments, the DC protection unit 210 further includes a DC power supply 216, a pre-charging resistor 217, and a DC relay 218. Specifically, the DC power supply 216 is disposed in the first installation area 110 to provide energy for the DC capacitor 700; the pre-charging resistor 217 is connected to the DC power supply 216; and the DC relay 218 is connected to the DC power supply 216 and the pre-charging resistor 217.

[0055] In some embodiments, the DC protection unit 210 further includes a DC filter capacitor 219. Specifically, the DC filter capacitor 219 is disposed in the first installation area 110 and connected to the power module 300, thereby filtering out harmonics on the DC side to improve the reliability and stability of the energy storage converter.

[0056] Specifically, the DC filter capacitor 219 is a DC EMI (Electromagnetic Interference) capacitor plate.

[0057] In some embodiments, the functional component 200 further includes an AC protection unit 220. The AC protection unit 220 is connected to the power module 300 to control the on / off of the AC side and provide overcurrent protection, thereby helping to improve the reliability and stability of the entire device.

[0058] In the above embodiment, the AC protection unit 220 protects the AC circuit breaker 221. The AC circuit breaker 221 is connected to the power module 300. The AC circuit breaker 221 can control the switching operation of the power module 300. When an abnormal situation occurs, the circuit can be quickly cut off to protect the device from damage, thereby ensuring the safe, reliable and stable operation of the entire device.

[0059] It is understandable that, in actual use, in addition to using the AC circuit breaker 221, an isolating switch and a contactor may also be used to achieve the same cut-off protection function.

[0060] In some embodiments, the AC protection unit 220 further includes an AC filter capacitor 222. The AC filter capacitor 222 is disposed in the first installation area 110 and connected to the power module 300, thereby filtering out harmonics on the AC side to improve the reliability and stability of the energy storage converter.

[0061] Specifically, the AC filter capacitor 222 is an AC EMI capacitor plate.

[0062] In some embodiments, the functional component 200 further includes a lightning arrester 230. In power, communication, data transmission and other systems, lightning arresters play a vital role to ensure that the equipment can operate stably in harsh electrical environments. When an external line or device generates an overvoltage due to lightning or other reasons, the lightning arrester 230 can respond quickly to limit the overvoltage to a safe range that the device can withstand, or guide the overvoltage to the ground line, thereby preventing the overvoltage from damaging other internal electrical components.

[0063] In some embodiments, the energy storage converter further includes an AC capacitor 800 and an AC filter 810. Specifically, the AC capacitor 800 is disposed in the second installation area 120, and the AC filter 810 connects the AC capacitor 800 and the power module 300.

[0064] In the above embodiment, the AC capacitor 800 can provide a certain voltage support function on the one hand, and on the other hand, the AC capacitor 800 and the AC filter 810 work together to filter out the harmonics on the AC side, thereby helping to improve the stability of the equipment operation.

[0065] In some embodiments, the AC filter 810 is connected to an absorption capacitor 820 to further filter out residual high-frequency noise and ripples in the output signal of the AC filter 810 to make the output signal purer.

[0066] Reference Figure 6 In order to facilitate the movement of the entire device, in some embodiments, a walking unit 150 is provided at the bottom of the cabinet 100. The walking unit 150 allows the device to be easily moved between different locations, thereby improving the flexibility and adaptability of the device. Specifically, the walking unit 150 adopts a bearing structure. It is understood that in actual applications, a rolling rotor structure or the like may also be adopted, and the present embodiment is not limited thereto.

[0067] Reference Figure 5 In some embodiments, the external interface on the operation panel 140 includes a signal interface 141, a coolant inlet 142, and a coolant outlet 143. The coolant inlet 142 is connected to the water inlet end 6111 of the water inlet water separation block 611, and the coolant outlet 143 is connected to the water outlet end 6161 of the water outlet water collection block 616. In this way, the coolant enters through the coolant inlet 142 and then flows out through the coolant outlet 143, realizing recycling, thereby taking away the heat of the whole machine.

[0068] In some embodiments, the energy storage converter further includes a current sensor 900 for detecting current information. As an important component of equipment monitoring, the current sensor 900 can quickly respond to and handle potential problems through real-time monitoring and early warning, reduce downtime and maintenance costs caused by failures, and significantly improve system reliability and stability.

[0069] Specifically, the current sensor 900 is a Hall sensor. It is understandable that an electronic current sensor and a conventional electromagnetic current sensor may also be used, and the present embodiment is not limited thereto.

[0070] It should be clarified that in the claims, specification and drawings of the present application, the term "multiple" refers to two or more than two. Unless otherwise clearly defined, the orientation or position relationship indicated by the terms "upper" and "lower" is based on the orientation or position relationship shown in the drawings, which is only for the purpose of more conveniently describing the present application and making the description process easier, rather than indicating or implying that the device or element referred to must have the specific orientation described, be constructed and operated in a specific orientation, so these descriptions cannot be understood as limitations on the present application; the terms "connect", "install", "fix" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, or a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood based on the specific circumstances of the above data.

[0071] In the claims, specification and drawings of the present application, the description of the terms "one embodiment", "some embodiments", "specific embodiments" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the claims, specification and drawings of the present application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0072] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An energy storage converter, characterized in that: include: The cabinet has a first installation area and a second installation area arranged opposite to each other, wherein the first installation area and the second installation area are provided with mutually communicating air ducts; A functional component is arranged in the first installation area; A power module is arranged in the second installation area; A liquid cooling plate, disposed on the power module to cool the power module; A liquid-to-air heat exchanger is arranged in the first installation area; the liquid-to-air heat exchanger is connected to the liquid cooling plate to form a heat exchange cycle; the liquid-to-air heat exchanger is connected to the air duct to form an air cooling circulation loop; The fan is arranged in the first installation area and is used to drive the air flow in the air duct.

2. The energy storage converter according to claim 1, characterized in that: The energy storage converter further includes a flow splitter unit; the flow splitter unit is connected to the liquid-to-air heat exchanger or the liquid cooling plate; The diversion unit comprises: A water inlet splitter block is arranged in the first installation area, and the water inlet splitter block is connected to a water inlet pipe of a liquid cooling plate or a water inlet pipe of a heat exchanger; The water outlet and water collecting block is arranged in the first installation area, and the water outlet and water collecting block is connected to the return water pipe of the liquid cooling plate or the return water pipe of the heat exchanger.

3. The energy storage converter according to claim 2, characterized in that: The diversion unit further includes a pressure detection element and / or a temperature detection element; The pressure detection element and the temperature detection element are arranged at the water inlet end of the water inlet water dividing block and the water outlet end of the water outlet water collecting block.

4. The energy storage converter according to claim 1, characterized in that: The energy storage converter also includes: A DC capacitor, arranged in the second installation area, for providing DC side energy; The laminated busbar connects the DC capacitor and the power module.

5. The energy storage converter according to claim 4, characterized in that: The functional components include: A DC protection unit, the DC protection unit is connected to the power module to control the on and off of the DC side and provide DC overcurrent protection; and / or An AC protection unit is connected to the power module to control the on / off of the AC side and provide AC overcurrent protection.

6. The energy storage converter according to claim 5, characterized in that: The DC protection unit comprises: A DC fuse is arranged in the first installation area; A DC contactor connects the DC fuse and the DC capacitor; An isolating switch connected to the DC fuse; The isolating switch operating handle is connected to the isolating switch to control the opening or closing of the isolating switch.

7. The energy storage converter according to claim 6, characterized in that: The DC protection unit also includes a DC magnetic ring; the DC magnetic ring connects the isolating switch and the isolating switch operating handle.

8. The energy storage converter according to claim 5, characterized in that: The DC protection unit also includes: A DC power supply, disposed in the first installation area, for providing energy to the DC capacitor; A pre-charging resistor connected to the DC power supply; A DC relay is used to connect the DC power supply and the pre-charging resistor.

9. The energy storage converter according to claim 5, characterized in that: The AC protection unit comprises: AC circuit breaker; the AC circuit breaker is connected to the power module; and / or, The AC filter capacitor is arranged in the first installation area.

10. The energy storage converter according to claim 1, characterized in that: The energy storage converter also includes: an AC capacitor, arranged in the second installation area; An AC filter, connecting the power module and the AC capacitor; An absorption capacitor is connected between the AC filter and the AC capacitor.

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