Integrated energy storage cabinet

Abstract

The utility model relates to the technical field of energy storage, in particular to an integrated energy storage cabinet. Comprising a cabinet body, and a distribution box, a control box, a liquid cooling box and a plurality of battery packs which are arranged in the cabinet body, the control box is respectively connected with the plurality of battery packs and the distribution box, and comprises a box body, and a PCS module, a BMS module and an EMS module which are arranged in the box body; a battery bin and an electrical bin are arranged in the cabinet body from top to bottom in the height direction of the cabinet body, and the multiple battery packs are arranged in the battery bin; the control box, the distribution box and the liquid cooling box are arranged in the electrical bin along the height direction of the cabinet body, and the liquid cooling box is arranged at the bottom of the electrical bin. Through integrated arrangement of the PCS module, the BMS module and the EMS module, the internal space layout is optimized and compact, the system architecture is simplified, and the size of the energy storage cabinet is reduced.

Description

Technical Field

[0001] This application relates to the technical field of energy storage, and particularly to an integrated energy storage cabinet. Background Art

[0002] With the development of power systems and energy storage technologies, energy storage cabinets play an increasingly important role in power energy storage systems.

[0003] In the layout of traditional energy storage cabinets, each component (such as a power conversion system (PCS), a battery management system (BMS), an energy management system (EMS), a high-voltage box, a distribution box, a liquid cooling unit, etc.) is set separately, resulting in a large occupied space, complex connections, and difficult maintenance of the system. Therefore, it is necessary to design a highly integrated and compact layout of the energy storage cabinet. Summary of the Utility Model

[0004] Based on this, it is necessary to provide an integrated energy storage cabinet that optimizes space utilization.

[0005] An integrated energy storage cabinet includes a cabinet body, and a distribution box, a control box, a liquid cooling box, and multiple battery packs arranged in the cabinet body; the control box is respectively connected to the multiple battery packs and the distribution box, and the control box includes a box body, and a PCS module, a BMS module, and an EMS module arranged in the box body; along the height direction of the cabinet body, a battery compartment and an electrical compartment are provided in the cabinet body from top to bottom, and the multiple battery packs are arranged in the battery compartment; the control box, the distribution box, and the liquid cooling box are arranged along the height direction of the cabinet body in the electrical compartment, and the liquid cooling box is arranged at the bottom of the electrical compartment.

[0006] In one embodiment, the box body includes a first compartment and a second compartment, the BMS module, the EMS module, and the PCS module are arranged in the first compartment, and a heat dissipation component is arranged in the second compartment.

[0007] In one embodiment, the heat dissipation component includes a radiator, an air inlet and an air outlet are formed on the second compartment, the air inlet and the air outlet are communicated to form an air duct communicated with the external air, and the air flowing in the air duct can perform air cooling on the radiator.

[0008] In one embodiment, the first compartment is a sealed compartment, a breather valve is arranged on the box body, and the air in the first compartment can be gas-communicated with the external air through the breather valve to balance the air pressure inside and outside the first compartment.

[0009] In one embodiment, the PCS module includes a driving component and a control component. The driving component is located in the middle of the first chamber, and the bottom of the driving component is in contact with the radiator.

[0010] In one embodiment, the distribution box includes a chassis and an interface board disposed within the chassis. The energy storage cabinet performs internal and external signal transmissions through the interface board. The PCS module and the BMS module are both communicatively connected to the plurality of battery packs and the EMS module. The EMS module is communicatively connected to the interface board.

[0011] In one embodiment, the distribution box further includes a DC-DC power module and an AC-DC power module disposed within the chassis. The input end of the DC-DC power module is connected to the DC output ends of the plurality of battery packs. The input end of the AC-DC power module is connected to the power grid. The DC-DC power module and the AC-DC power module are interconnected at the output end and input to the interface board, and are output from the interface board to the PCS module, the BMS module, and the EMS module. The energy storage cabinet performs power transmission through the interface board.

[0012] In one embodiment, the distribution box further includes a fault isolation unit disposed within the chassis and connected to the output end.

[0013] In one embodiment, the interface board includes a plurality of modular interfaces. The modular interface includes a socket disposed on the interface board and a modular connector plugged into the socket. The modular connector includes a power module connector and a signal processing module connector. The signal processing module connector is used for the signal transmission, and the power module connector is used for the power transmission.

[0014] In one embodiment, the BMS module is configured to sample the battery parameters of each battery pack to obtain a battery sampling signal and send it to the EMS module. The EMS module is configured to output a corresponding power control signal according to the battery sampling signal and send it to the PCS module. And send the battery parameters corresponding to the battery sampling signal to the cloud platform, and forward the battery control instruction sent by the cloud platform to the PCS module. The PCS module is configured to control the charging power or discharging power of the battery pack according to the power control signal and the battery control instruction. The EMS module includes an EMS controller and a communication unit connected to each other. The communication unit is connected to the cloud platform. The EMS controller is configured to convert the battery sampling signal into corresponding battery parameters. The battery parameters include the voltage, current, and temperature of the battery cluster. The communication unit is configured to forward the battery parameters to the cloud platform.

[0015] Compared with the prior art, by integrating the PCS module, BMS module, and EMS module, the integrated energy storage cabinet optimizes and compacts the internal space layout, simplifies the system architecture, reduces the volume of the energy storage cabinet, simplifies the system architecture, and realizes a single-column layout energy storage cabinet structure with a small volume. It simplifies the electrical connection, improves the reliability of the system and the convenience of maintenance. By adopting the layout form with the control box placed at the bottom inside the cabinet, the purpose of reducing the volume and cost is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a front view structural schematic diagram of the integrated energy storage cabinet provided by the present application.

[0018] Figure 2 It is a rear view structural schematic diagram of the integrated energy storage cabinet provided by the present application.

[0019] Figure 3 It is a structural schematic diagram of the control box provided by the present application.

[0020] Figure 4 It is a front view schematic diagram of the control box provided by the present application.

[0021] Figure 5 It is a rear view schematic diagram of the control box provided by the present application.

[0022] Figure 6 It is a Figure 3 cross-sectional view along line A-A in

[0023] Figure 7 It is a structural schematic diagram of the first compartment provided by the present application.

[0024] Figure 8 It is a structural schematic diagram of the distribution box provided by the present application.

[0025] Figure 9 It is a front view schematic diagram of the distribution box provided by the present application.

[0026] Figure 10 It is a rear view schematic diagram of the distribution box provided by the present application.

[0027] Figure 11 It is a structural schematic diagram of the interface board provided by the present application.

[0028] Figure 12Schematic diagram of the EMS module provided for this application.

[0029] Reference numerals: 100, cabinet; 1, battery compartment; 2, electrical compartment; 3, battery pack;

[0030] 4, distribution box; 41, chassis; 42, DC-DC power module; 43, AC-DC power module; 44, fault isolation unit; 441, diode; 45, interface board; 450, modular interface; 451, socket; 452, modular connector; 452a, power module connector; 452b, signal processing module connector; 46, terminal block; 47, control box interface; 48, first interface component; 49, second interface component;

[0031] 5, control box; 51, box body; 511, first compartment; 512, second compartment; 512a, air inlet; 512b, air outlet; 52, PCS module; 521, control component; 522, drive component; 53, BMS module; 54, EMS module; 541, EMS controller; 542, communication unit; 55, pre-charge resistor; 56, current sampler; 57, DC contactor; 58, DC circuit breaker; 59, power interface; 591, three-phase power interface; 592, power positive and negative interface; 510, indicator light; 520, antenna interface; 530, distribution box interface; 540, switch; 550, breather valve; 560, aviation plug interface; 500, heat dissipation component; 501, radiator; 502, extension plate; 503, opening;

[0032] 6, liquid cooling box; 61, liquid cooling unit; 62, liquid cooling pipeline. Detailed implementation manners

[0033] In order to make the above objects, features, and advantages of this application more obvious and understandable, the following will describe in detail the specific implementation manners of this application with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of this application. Therefore, this application is not limited by the specific embodiments disclosed below.

[0034] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the description of this application are only for the purpose of illustration and do not represent the only implementation manner.

[0035] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0036] In this application, unless otherwise clearly specified and defined, the first feature may be in direct contact with the second feature or indirectly contact the second feature through an intermediate medium when the first feature is "on" or "under" the second feature. Moreover, when the first feature is "above", "over" or "on top of" the second feature, it may be directly above or diagonally above the second feature, or merely indicate that the horizontal height of the first feature is higher than that of the second feature. When the first feature is "below", "beneath" or "underneath" the second feature, it may be directly below or diagonally below the second feature, or merely indicate that the horizontal height of the first feature is less than that of the second feature.

[0037] Unless otherwise defined, all technical and scientific terms used in the description of this application have the same meaning as commonly understood by those skilled in the technical field to which this application pertains. The terms used in the description of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the description of this application includes any and all combinations of one or more of the related listed items.

[0038] Please refer to Figures 1 to 12 , this application provides an integrated energy storage cabinet, which includes a cabinet body 100 and a distribution box 4, a control box 5, a liquid cooling box 6 and a plurality of battery packs 3 arranged in the cabinet body 100. The control box 5 is respectively connected to the plurality of battery packs 3 and the distribution box 4. The control box 5 includes a box body 51 and a PCS module 52, a BMS module 53 and an EMS module 54 arranged in the box body 51. Along the height direction of the cabinet body 100, a battery compartment 1 and an electrical compartment 2 are provided in the cabinet body 100 from top to bottom, and a plurality of battery packs 3 are arranged in the battery compartment 1. The control box 5, the distribution box 4 and the liquid cooling box 6 are arranged along the height direction of the cabinet body 100 in the electrical compartment 2, and the liquid cooling box 6 is arranged at the bottom of the electrical compartment 2.

[0039] Among them, the PCS module 52 is a power conversion system for energy storage, the BMS module 53 is a battery management system, and the EMS module 54 is an energy management system. The PCS module 52, the BMS module 53 and the EMS module 54 are communicatively connected. Preferably, in this embodiment, the data and instructions between the modules are interacted through a high-speed communication bus. The distribution box 4 is used to supply power to the control box 5 and make line connections, the control box 5 is used to control the charging and discharging of the battery packs 3, and the liquid cooling box 6 is used to cool down the battery packs 3 and the control box 5.

[0040] It can be understood that the PCS module 52, the BMS module 53, and the EMS module 54 are integrated into the control box 5, so that the three modules only occupy the space of one control box 5, compacting the internal space layout and reducing the volume of the energy storage cabinet. At the same time, the battery compartment 1 and the electrical compartment 2 are arranged vertically, making full use of the space of the energy storage cabinet in the vertical direction to realize the single-column arrangement of the energy storage cabinet; the battery compartment and the electrical compartment are separated up and down, effectively cutting off the mutual influence and threat between the battery and the electrical appliances, and greatly improving the safety; on this basis, the distribution box 4, the control box 5, and the liquid cooling box 6 are all arranged at the bottom of the energy storage cabinet, so that the sun does not directly shine on the core control component - the control box 5, avoiding the situation of downshifting due to overheating and improving the efficiency of the energy storage cabinet.

[0041] See Figures 3 to 7 , the box body 51 includes a first compartment 511 and a second compartment 512. The BMS module 53, the EMS module 54, and the PCS module 52 are arranged in the first compartment 511, and a heat dissipation component 500 is arranged in the second compartment 512.

[0042] Exemplarily, along the height direction of the cabinet body 100, the first compartment 511 and the second compartment 512 are distributed up and down, and the first compartment 511 is arranged above the second compartment 512.

[0043] It can be understood that the BMS module 53, the EMS module 54, and the PCS module 52 are all arranged in the upper first compartment 511, and the heat dissipation component 500 is separately arranged in the lower second compartment 512. After the first compartment 511 is sealed, the internal electrical modules can be protected to the greatest extent to prevent damage to the above electrical modules caused by external water intrusion, improving the protection performance of the entire box body 51. Specifically, the heat dissipation component 500 includes a radiator 501. An air inlet 512a and an air outlet 512b are opened on the second compartment 512. The air inlet 512a and the air outlet 512b are communicated to form an air duct communicating with the external air, and the air flowing in the air duct can perform air-cooled heat dissipation on the radiator 501.

[0044] That is to say, the control box 5 can dissipate heat from the radiator 501 in an air-cooled manner when working. Here, the air inlet 512a and the air outlet 512b are arranged on the opposite sides of the second compartment 512. In other embodiments, a heat dissipation fan can also be arranged on the air duct between the air inlet 512a and the air outlet 512b to increase the heat dissipation efficiency.

[0045] Specifically, the first compartment 511 is an airtight compartment, and a breathing valve 550 is provided on the box body 51. The air in the first compartment 511 can be in gas communication with the external air through the breathing valve 550 to balance the air pressure inside and outside the first compartment 511.

[0046] It can be understood that the breathing valve 550 is used to balance the internal and external air pressures of the first chamber 511, achieving high tightness of the first chamber 511, improving the protection level, and increasing the service life of the control box 5. Moreover, the conduction of the gas between the first chamber 511 and the external air can be utilized to dissipate heat and prevent the formation of condensed water inside the first chamber 511. Thus, the control box 5 has high practicability and economic value.

[0047] In this application, the breathing valve 550 includes a breathable membrane (not shown in the figure). The breathable membrane allows air to flow through, and moreover, the breathable membrane can block the flow of water. That is to say, the breathing valve 550 can utilize the characteristics of the breathable membrane to be breathable but not permeable to water to achieve the connection between the first chamber 511 and the external air and prevent external water from invading the first chamber 511.

[0048] Preferably, the breathing valve 550 is connected to the side wall of the first chamber 511 in a threaded manner, which facilitates the assembly of the breathing valve 550. At the same time, the threaded mating structure ensures the tightness of the breathing valve 550 when assembled on the first chamber 511. Here, the breathing valve 550 is fixedly connected to the first chamber 511 through a nut.

[0049] In the process of large-scale popularization and application of energy storage devices, many challenges are encountered, such as environmental factors like humidity, heavy rain, and rapid and large temperature differences. With the increasing number of extreme weather conditions, the protection requirements for energy storage devices are also getting higher and higher. Currently, the protection levels of many industrial and commercial energy storage cabinet bodies on the market are limited, and the protection level of the air-cooled PCS bidirectional converter is not high either. To protect the expensive core component, the air-cooled PCS bidirectional converter, from being damaged due to water ingress, most choose to design the battery compartment and electrical compartment of the energy storage cabinet body into a left-right structure, with the air-cooled PCS bidirectional converter suspended inside the electrical compartment, or an up-down structure, with the air-cooled PCS bidirectional converter placed at the top of the energy storage cabinet. Because placing it below the cabinet body has a risk of water ingress, especially for liquid-cooled cabinets, there is a risk of a large amount of coolant flowing out due to burst pipes. However, new problems arise in the actual use process. The left-right structure occupies a large area, and the construction cost and costs such as internal cables are relatively high; although the structure with the air-cooled PCS bidirectional converter placed at the top reduces the floor area, it increases the costs such as internal cables. Moreover, the air-cooled PCS bidirectional converter generates a large amount of heat during operation. Placed on the cabinet top, it is easily exposed to high temperatures and sunlight, causing the PCS bidirectional converter to be in a high-temperature working environment for a long time and being easily damaged; due to the low self-protection level of the air-cooled PCS bidirectional converter, both of the above two existing solutions face the risk of water ingress brought by condensate water and the failure of the protection of the energy storage cabinet body. To improve this problem, high-protection liquid-cooled PCS bidirectional converters have emerged on the market, but due to high costs and difficult maintenance, their popularity is limited. In this embodiment, the cabinet body 51 of the control box 5 integrating the PCS module 52 is divided into a first compartment 511 and a second compartment 512. The electrical components are arranged in the sealed chamber of the first compartment 511, and a breathing valve is used to balance the internal and external air pressures of the first compartment 511. This can not only improve the protection level of the control box 5 and extend the service life of the electrical components in the first compartment 511, but also utilize the gas conduction between the sealed chamber and the external air to play a heat dissipation role and prevent the formation of condensate water inside the first compartment 511. In this way, the control box 5 can maintain a relatively low cost while significantly improving the protection level, and can be placed in the electrical compartment 2 below the energy storage cabinet, further reducing the volume of the energy storage cabinet and the amount of internal cables, thus greatly reducing the cost.

[0050] Specifically, the PCS module 52 includes a driving component 522 and a control component 521. The driving component 522 is located in the middle of the first compartment 511, and the bottom of the driving component 522 is in contact with the radiator 501.

[0051] It can be understood that since the driving component 522 includes multiple power devices, it generates more heat during operation compared to the control component 521. Through the contact between the bottom of the driving component 522 and the radiator 501, the heat of the driving component 522 is transferred to the radiator 501 faster, improving the heat dissipation efficiency.

[0052] Further, the control component 521 is arranged on the side of the drive component 522. Extension plates 502 are connected to both sides of the radiator 501. The control component 521 and other electrical modules in the control box 5 are all arranged on the extension plates 502, and heat is transferred to the radiator 501 through the extension plates 502 to achieve heat dissipation.

[0053] Preferably, the EMS module 54 is integrally arranged with the control component 521. That is, the EMS module 54 is installed on the control component 521 to further reduce the volume.

[0054] Further, the radiator 501 can be a heat dissipation plate or a heat sink, preferably made of a metal material. The radiator 501 is arranged in the second compartment 512 and exchanges heat with the PCS module 52. The heat generated when the PCS module 52 works is transferred to the second compartment 512 by the heat sink to meet the heat dissipation use requirements for the PCS module 52. It should be noted that the number of heat sinks or heat dissipation plates is set to multiple, and the specific number is selected according to actual needs.

[0055] Preferably, an opening 503 is formed in the bottom plate of the first compartment 511 corresponding to the position of the drive component 522. The top of the radiator 501 is placed in the opening 503 and is in contact with the drive component 522, so as to better dissipate heat from the drive component 522. It should be noted that the inner side wall of the opening 503 and the outer side wall of the radiator 501 are in sealing fit to ensure that the first compartment 511 is a sealed chamber.

[0056] In this embodiment, the BMS module 53 is used to sample the battery parameters of each battery pack 3, obtain a battery sampling signal and send it to the EMS module 54. The EMS module 54 is used to output a corresponding power control signal according to the battery sampling signal and send it to the PCS module 52. And send the battery parameters corresponding to the battery sampling signal to the cloud platform, and forward the battery control instructions sent by the cloud platform to the PCS module 52. The PCS module 52 is used to control the charging power or discharging power of the battery pack 3 according to the power control signal and the battery control instructions.

[0057] See Figure 12 , the EMS module 54 includes an EMS controller 541 and a communication unit 542 that are connected to each other. The communication unit 542 is connected to the cloud platform. The EMS controller 541 is used to convert the battery sampling signal into corresponding battery parameters, and the battery parameters include the voltage, current, and temperature of the battery cluster. The communication unit 542 is used to forward the battery parameters to the cloud platform.

[0058] Specifically, the EMS controller 541 can be a single-chip microcomputer, replacing the industrial control computer in the prior art, running the basic operating system and application programs as the main control, reducing the hardware cost, reducing the occupied physical space and device power consumption.

[0059] Specifically, the communication unit 542 can be a component with wired communication or wireless communication functions. Wired communication can be Ethernet or bus communication, and wireless communication can be a mobile communication network such as 4G or 5G, or a wireless communication network such as WIFI or Bluetooth.

[0060] Specifically, the cloud platform can be a battery management and energy scheduling platform, which can be used to monitor the working status of each battery cluster in real time and perform energy scheduling for the charging and discharging of energy storage batteries.

[0061] In one embodiment, the control box 5 further includes a pre-charge resistor 55, a current sampler 56, a DC contactor 57, and a DC circuit breaker 58. Among them, the above-mentioned pre-charge resistor 55, current sampler 56, DC contactor 57, and DC circuit breaker 58 are arranged inside the box body 51.

[0062] Exemplarily, the above-mentioned current sampler 56 adopts a Hall current sampler 56. Exemplarily, the above-mentioned DC circuit breaker 58 adopts a DC molded case circuit breaker.

[0063] In one embodiment, the control box 5 further includes a power interface 59, an indicator light 510, an antenna interface 520, a distribution box interface 530, a switch 540, and a connector interface 560. Among them, the above-mentioned power interface 59, indicator light 510, antenna interface 520, distribution box interface 530, switch 540, and connector interface 560 are arranged on the side wall of the box body 51.

[0064] Specifically, the power interface 59 includes a three-phase power interface 591 and a power positive and negative interface 592. Among them, the three-phase power interface 591 is arranged on the side wall of the box body 51 close to the first compartment 511 in the length direction. The power positive and negative interface 592 is arranged on the side wall of the box body 51 close to the second compartment 512 in the length direction. That is, the power positive and negative interface 592 is arranged on the opposite side of the three-phase power interface 591.

[0065] Further, the indicator light 510, antenna interface 520, distribution box interface 530, switch 540, and connector interface 560 are arranged on the same side wall of the box body 51 as the power positive and negative interface 592. And this side wall of the box body 51 faces the front door of the cabinet.

[0066] Exemplarily, the switch 540 adopts a manual switch 540. Exemplarily, the number of the indicator lights 510 and antenna interfaces 520 is set to be multiple, and is specifically selected according to actual needs. The indicator lights 510 include power indicator lights, operation indicator lights, fault indicator lights, etc. The connector interface 560 includes signal interfaces, power interfaces, etc.

[0067] Exemplarily, a breather valve 550 is further arranged on the side wall of the box body 51, and the breather valve 550 is arranged on the same side as the three-phase power interface 591.

[0068] Furthermore, the distribution box interface 530 is electrically connected to the distribution box 4 through a patch cord, realizing the connection between the control box 5 and the distribution box 4.

[0069] See Figures 8 to 11 , the distribution box 4 includes a chassis 41 and an interface board 45 disposed within the chassis 41. The energy storage cabinet conducts internal and external signal transmissions through the interface board 45. Both the PCS module 52 and the BMS module 53 are communicatively connected to a plurality of battery packs 3 and the EMS module 54. The EMS module 54 is communicatively connected to the interface board 45.

[0070] It can be understood that through the integration of the PCS module 52, the BMS module 53, and the EMS module 54 into one (integrated), and the control box 5 in which the EMS module 54 is responsible for internal and external signal transmission control, and the interface board 45 responsible for all internal and external data input and output of the energy storage cabinet, and communicatively connecting the EMS module 54 and the interface board 45, signal unified management is achieved, simplifying the entire wiring and layout within the cabinet, thereby reducing the volume of the cabinet 100 and lowering costs.

[0071] Furthermore, the distribution box 4 further includes a DC-DC power module 42 and an AC-DC power module 43 disposed within the chassis 41. The input end of the DC-DC power module 42 is connected to the DC output ends of a plurality of battery packs 3, and the input end of the AC-DC power module 43 is connected to the power grid. The DC-DC power module 42 and the AC-DC power module 43 are interconnected at the output end and input to the interface board 45, and are output from the interface board 45 to the PCS module 52, the BMS module 53, and the EMS module 54. The energy storage cabinet conducts power transmission through the interface board 45.

[0072] It can be understood that by using the energy storage battery as an emergency power source, the traditional emergency power source is cancelled, and the interface board 45 is uniformly responsible for power transmission, thereby reducing the volume of the distribution box 4, and further reducing the volume of the entire cabinet 100.

[0073] The wiring method of traditional energy storage cabinets mainly relies on terminal blocks or direct functional module connections. This connection method is prone to messy wiring and difficult maintenance in complex systems, and due to the large number of independent wiring points, it increases the risk of poor contact, thus affecting the overall reliability of the system. The energy storage cabinet connection solution based on an integrated interface board proposed in this embodiment significantly optimizes the wiring structure and maintenance operations by uniformly managing all signal and power interfaces, improving the reliability and maintainability of the system.

[0074] Among them, the DC-DC power module 42 is a DC-to-DC power converter, and the AC-DC power module 43 is an AC-to-DC power converter. The DC-DC power module 42 converts the high-voltage DC power of the energy storage cabinet itself into a DC 24V power supply, and the AC-DC power module 43 converts the commercial power into a DC 24V power supply. The two are connected in parallel and output to the interface board 45, and the interface board 45 uniformly distributes and transmits power to the load end.

[0075] Exemplarily, the interface board 45 uses a PCB (Printed Circuit Board). Multiple interfaces on the interface board 45 realize the unified management and distribution of signals and power within the energy storage cabinet through the circuits on the PCB. Among them, various protection circuits can be integrated on the PCB, including overcurrent protection, overvoltage protection, short-circuit protection, etc., to ensure the safe operation of the system.

[0076] See Figure 11 , the interface board 45 includes multiple modular interfaces 450. The specific quantity and arrangement can be selected according to actual needs. The modular interface 450 classifies the interfaces by function, and each function is standardized, making the function interface widely used and facilitating flexible configuration; enabling the interface board 45 to expand functions and be flexibly configured according to different requirements.

[0077] Furthermore, the modular interface 450 includes a socket 451 and a modular connector 452. The socket 451 is opened on the interface board 45, and the modular connector 452 is plugged into the socket 451. The modular connector 452 includes a power module connector 452a and a signal processing module connector 452b. The signal processing module connector 452b is used for signal transmission, and the power module connector 452a is used for power transmission.

[0078] It can be understood that the detachable modular interface 450 of the interface board 45 facilitates the replacement of connectors and the expansion of applications. The electrical connections of all modules use standardized stacked interfaces, supporting quick plugging and unplugging and maintenance, reducing the complexity and time cost of maintenance. Preferably, the connection points on the socket 451 are welded to the interface board 45 to enhance reliability and safety and avoid problems of poor contact.

[0079] Furthermore, an anti-static gripper is also provided on the interface board 45, which is made of anti-static material, enabling users to safely hold the interface board 45 during installation or maintenance and avoiding static damage to sensitive electronic components.

[0080] See Figure 8, the distribution box 4 further includes a fault isolation unit 44 disposed inside the chassis 41 and connected to the output terminal. The fault isolation unit 44 is mainly used to achieve overcurrent protection, overvoltage protection, and short-circuit protection between the power supply end and the load end. When a fault occurs in the PCS module 52, BMS module 53, or EMS module 54, the fault isolation unit 44 can cut off the connection between the faulty module and the energy storage power supply system, without affecting the normal operation of the energy storage system, enhancing the fault tolerance of the energy storage system. Secondly, when the system detects abnormal current or voltage, the fault isolation unit 44 can quickly cut off the power supply to protect the equipment from damage.

[0081] Exemplarily, the fault isolation unit 44 can adopt electrical components such as diodes 441, surge protectors, fuses, and circuit breakers. Among them, the diode 441 is used to prevent reverse current; the fuse will melt when the current exceeds a certain value, disconnecting the circuit to protect subsequent equipment; the circuit breaker is a reusable protection device that automatically cuts off the power supply when detecting a short circuit or overload and can be manually reset; the surge protector protects the equipment from power surges by quickly transferring overvoltage. One or more of the above electrical components can be specifically selected according to actual needs.

[0082] Furthermore, the distribution box 4 further includes a terminal block 46 and a control box interface 47. The terminal block 46 is disposed on the side wall of the chassis 41, and the control box interface 47 is disposed on the side wall of the chassis 41 opposite to the terminal block 46.

[0083] Specifically, a plurality of terminal blocks 46 are provided and are distributed in multiple rows and columns on the side wall of the chassis 41. The specific number can be selected according to the actual situation and will not be elaborated here.

[0084] Furthermore, the control box interface 47 is electrically connected to the control box interface 47 through an insertion wire to achieve the connection between the control box 5 and the distribution box 4.

[0085] In an embodiment, the distribution box 4 further includes a first interface component 48, and the first interface component 48 is disposed inside the chassis 41.

[0086] Furthermore, the number of the first interface components 48 is set to be multiple. In this embodiment, the first interface components 48 are set to two groups, and the two groups of first interface components 48 are respectively disposed on both sides of the DC-DC power module 42, AC-DC power module 43, diode 441, and interface board 45.

[0087] It can be understood that components such as the DC-DC power module 42, AC-DC power module 43, diode 441, and interface board 45 are disposed between the two groups of first interface components 48. Water immersion sensors, relays, terminal blocks 46, etc. can be connected to the first interface components 48.

[0088] Further, a plurality of openings are formed in the first interface member 48 along its length direction. Exemplarily, the first interface member 48 is a strip-shaped metal bar, which facilitates the assembly and connection of the above-mentioned electrical components. In other embodiments, it may also be set to other shapes and materials.

[0089] In one embodiment, the distribution box 4 further includes a second interface member 49, which is disposed on the side wall of the chassis 41 close to the control box interface 47.

[0090] Further, an air switch, an electric meter, a socket, etc. can be connected to the second interface member 49.

[0091] Exemplarily, the second interface member 49 is a strip-shaped metal bar, which facilitates the assembly and connection of the above-mentioned electrical components. In other embodiments, it may also be set to other shapes and materials.

[0092] The distribution box 4 makes full use of the integrated interface board that omits the UPS emergency power supply and replaces the terminal block to integrate the above-mentioned multiple modules in a standard rack chassis, realizing the high integration and high modular design of the energy storage cabinet components, effectively saving the space of the energy storage cabinet, reducing the cable connection, and improving the reliability of the system operation.

[0093] In this embodiment, the liquid cooling box 6 includes a liquid cooling unit 61 and liquid cooling pipes 62. The liquid cooling pipes 62 include a coolant input pipe and a coolant output pipe, which are respectively connected to the liquid cooling unit and each component that needs to be cooled, including the battery pack 3 and the control box 5, so as to cool down the components that need to be cooled, such as the battery pack 3 and the control box 5.

[0094] The technical features of the above embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0095] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. An integrated energy storage cabinet, characterized in that, It includes a cabinet body (100), and a power distribution box (4), a control box (5), a liquid cooling box (6) and a plurality of battery packs (3) arranged in the cabinet body (100); the control box (5) is respectively connected to the plurality of battery packs (3) and the power distribution box (4), and the control box (5) includes a box body (51), and a PCS module (52), a BMS module (53) and an EMS module (54) arranged in the box body (51); along the height direction of the cabinet body (100), a battery compartment (1) and an electrical compartment (2) are provided in the cabinet body (100) from top to bottom, and the plurality of battery packs (3) are arranged in the battery compartment (1); the control box (5), the power distribution box (4) and the liquid cooling box (6) are arranged along the height direction of the cabinet body (100) in the electrical compartment (2), and the liquid cooling box (6) is arranged at the bottom of the electrical compartment (2).

2. The integrated energy storage cabinet according to claim 1, characterized in that, The box body (51) includes a first compartment (511) and a second compartment (512), the BMS module (53), the EMS module (54), and the PCS module (52) are arranged in the first compartment (511), and a heat dissipation component (500) is arranged in the second compartment (512).

3. The integrated energy storage cabinet according to claim 2, wherein, The heat dissipation component (500) includes a radiator (501), an air inlet (512a) and an air outlet (512b) are formed on the second compartment (512), the air inlet (512a) is communicated with the air outlet (512b) to form an air duct communicated with the external air, and the air flowing in the air duct can perform air cooling on the radiator (501).

4. The integrated energy storage cabinet according to claim 2, characterized in that, The first compartment (511) is a sealed compartment, a breather valve (550) is arranged on the box body (51), and the air in the first compartment (511) can be gas-communicated with the external air through the breather valve (550) to balance the air pressure inside and outside the first compartment (511).

5. The integrated energy storage cabinet according to claim 3, wherein, The PCS module (52) includes a driving component (522) and a control component (521), the driving component (522) is located in the middle of the first compartment (511), and the bottom of the driving component (522) is in contact with the radiator (501).

6. The integrated energy storage cabinet according to claim 1, characterized in that The power distribution box (4) includes a chassis (41), and an interface board (45) arranged in the chassis (41), and the energy storage cabinet performs internal and external signal transmission through the interface board (45); the PCS module (52) and the BMS module (53) are both communicatively connected to the plurality of battery packs (3) and the EMS module (54); the EMS module (54) is communicatively connected to the interface board (45).

7. The integrated energy storage cabinet according to claim 6, wherein The distribution box (4) further includes a DC-DC power module (42) and an AC-DC power module (43) disposed in the chassis (41). The input end of the DC-DC power module (42) is connected to the DC output ends of a plurality of the battery packs (3), and the input end of the AC-DC power module (43) is connected to the power grid. The DC-DC power module (42) and the AC-DC power module (43) are interconnected at the output end and input to the interface board (45), and are output from the interface board (45) to the PCS module (52), the BMS module (53), and the EMS module (54). The energy storage cabinet performs power transmission through the interface board (45).

8. The integrated energy storage cabinet according to claim 7, wherein, The distribution box (4) further includes a fault isolation unit (44) disposed in the chassis (41), which is connected to the output end.

9. The integrated energy storage cabinet according to claim 7, characterized in that, The interface board (45) includes a plurality of modular interfaces (450). The modular interface (450) includes a socket (451) disposed on the interface board (45), and a modular connector (452) plugged into the socket (451). The modular connector (452) includes a power module connector (452a) and a signal processing module connector (452b). The signal processing module connector (452b) is used for signal transmission, and the power module connector (452a) is used for power transmission.

10. The integrated energy storage cabinet according to claim 1, wherein, The BMS module (53) is used to sample the battery parameters of each of the battery packs (3) to obtain a battery sampling signal and send it to the EMS module (54); the EMS module (54) is used to output a corresponding power control signal according to the battery sampling signal and send it to the PCS module (52); and send the battery parameters corresponding to the battery sampling signal to the cloud platform, and forward the battery control instruction sent by the cloud platform to the PCS module (52); the PCS module (52) is used to control the charging power or discharging power of the battery pack (3) according to the power control signal and the battery control instruction; the EMS module (54) includes an EMS controller (541) and a communication unit (542) connected to each other. The communication unit (542) is connected to the cloud platform. The EMS controller (541) is used to convert the battery sampling signal into corresponding battery parameters, and the battery parameters include the voltage, current, and temperature of the battery cluster; the communication unit (542) is used to forward the battery parameters to the cloud platform.

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