Design method of high-voltage box, electronic equipment, high-voltage box and energy storage system

Abstract

The embodiment of the invention discloses a design method of a high-voltage box, electronic equipment, the high-voltage box and an energy storage system. According to the method, the design information of the high-voltage box is obtained, the category of each device in the high-voltage box is determined according to the design information, then the type selection mode of the devices is determined according to the category, and finally the devices are selected according to the type selection mode so as to determine the parameter information of the devices, so that the designed high-voltage box can be applied to the energy storage system. All protection indexes of the high-voltage box can meet the requirements of the energy storage system, and it is guaranteed that the energy storage system can operate safely.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a design method for a high-voltage box, electronic equipment, a high-voltage box, and an energy storage system. Background Technology

[0002] In energy storage systems, the high-voltage box plays a crucial role. It is a key intermediate unit connecting the battery clusters and the energy storage converter. Its main functions include acquiring battery cluster voltage and current, controlling and protecting the circuit contactors, and ensuring stable power transmission. It also undertakes protection, monitoring, and control functions to ensure the safe operation of the energy storage system. Therefore, the design of the high-voltage box is critical to the energy storage system; whether the design meets the requirements directly determines whether the energy storage system can operate safely. Summary of the Invention

[0003] This application provides a design method for a high-voltage box, electronic equipment, a high-voltage box, and an energy storage system. The high-voltage box designed can meet the requirements of the energy storage system in terms of various protection indicators after being applied to the energy storage system, thus ensuring the safe operation of the energy storage system.

[0004] In a first aspect, embodiments of this application provide a design method for a high-voltage box, wherein the high-voltage box applies an energy storage system, and the method includes:

[0005] Obtain the design information of the high-voltage box;

[0006] Based on the design information, determine the categories of each component inside the high-voltage box;

[0007] Determine the selection method for the components based on their category;

[0008] Based on the selection method, the device is selected to determine its parameter information.

[0009] Secondly, embodiments of this application also provide a design device for a high-voltage box, which utilizes an energy storage system. This device includes:

[0010] The acquisition unit is used to acquire the design information of the high-voltage box;

[0011] The first determining unit is used to determine the category of each component inside the high-voltage box based on the design information;

[0012] The second determining unit is used to determine the selection method of the device according to the category;

[0013] The third determining unit is used to select devices according to the selection method in order to determine the parameter information of the devices.

[0014] Thirdly, this application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the high-voltage box design method provided in the first aspect above.

[0015] Fourthly, embodiments of this application also provide a computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to execute the high-voltage box design method provided in the first aspect.

[0016] Fifthly, embodiments of this application also provide a computer program product, including a computer program or instructions, wherein the computer program or instructions are executed by a processor using the high-voltage box design method provided in the first aspect.

[0017] Sixthly, embodiments of this application also provide a high-voltage box, which is designed using the high-voltage box design method provided in the first aspect.

[0018] In a seventh aspect, this application also provides an energy storage system comprising the high-voltage box provided in the sixth aspect.

[0019] The high-voltage box design method provided in this application obtains the design information of the high-voltage box, determines the category of each component inside the high-voltage box based on the design information, then determines the selection method of the component based on the category, and finally selects the component based on the selection method to determine the parameter information of the component. This ensures that the designed high-voltage box, when applied to an energy storage system, meets the requirements of the energy storage system in all its protection indicators, thus guaranteeing the safe operation of the energy storage system. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a first internal circuit diagram of a high-voltage box provided in an embodiment of this application;

[0022] Figure 2 This is a second internal circuit diagram of a high-voltage box provided in an embodiment of this application;

[0023] Figure 3 This is a third internal circuit diagram of a high-voltage box provided in an embodiment of this application;

[0024] Figure 4Protection curves of circuit breakers and fuses in high-voltage boxes provided in embodiments of this application;

[0025] Figure 5 The fourth internal circuit diagram of the high-voltage box provided in the embodiments of this application;

[0026] Figure 6 The fifth internal circuit diagram of the high-voltage box provided in the embodiments of this application;

[0027] Figure 7 The sixth internal circuit diagram of the high-voltage box provided in the embodiments of this application;

[0028] Figure 8 A first architecture diagram illustrating the connection between the high-voltage box and the battery management system provided in an embodiment of this application;

[0029] Figure 9 This is a second architecture diagram showing the connection between the high-voltage box and the battery management system provided in an embodiment of this application;

[0030] Figure 10 A schematic block diagram of an energy storage system provided in an embodiment of this application;

[0031] Figure 11 A flowchart illustrating the design method of the high-voltage box provided in the embodiments of this application;

[0032] Figure 12 Arc front curve diagram of the fuse provided in the embodiments of this application;

[0033] Figure 13 The tripping curve diagram of the circuit breaker provided in the embodiments of this application;

[0034] Figure 14 A schematic block diagram of a high-voltage box design device provided in the embodiments of this application;

[0035] Figure 15 A schematic block diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0038] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0039] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0040] Furthermore, in this application, unless otherwise explicitly specified or limited in the embodiments, the terms "installation," "connection," "joining," and "fixing" appearing in the embodiments should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral part; it can also be a mechanical connection, an electrical connection, etc. Of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication between two components, or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific implementation.

[0041] This application provides a design method for a high-voltage box, electronic equipment, a high-voltage box, and an energy storage system.

[0042] Before introducing the design method of the high-voltage box, this application first provides a detailed introduction to the high-voltage box and energy storage system.

[0043] In related technologies, high-voltage boxes in energy storage systems typically rely on a combination of disconnect switches, fuses, and relays for fault protection. However, this approach has increasingly revealed its drawbacks. The minimum breaking capacity of fuses is usually 8 to 10 times their rated current. For example, a 500A fuse can only break a fault current of 4000A or higher. However, the maximum breaking capacity of relays is currently 2000A, and disconnect switches can only isolate fault currents they can withstand. This results in a protection blind zone for fault currents between 2000A and 4000A in the energy storage system, reducing the reliability of the energy storage system and posing safety hazards.

[0044] Specifically, when a small fault current occurs in the energy storage system, it can be interrupted by a relay; when a large short-circuit fault current occurs, it can be interrupted by a fuse. The main function of a disconnecting switch is to provide reliable electrical isolation and a visible disconnect point. It has strong short-circuit withstand capability but cannot be operated under load. Therefore, in the high-voltage box, only relays and fuses are used as devices to interrupt fault currents.

[0045] As the current in energy storage charging and discharging systems increases, the protection blind zone between relays and fuses gradually becomes more apparent. The maximum breaking current of a relay under rated voltage is 2kA, while the minimum breaking current of a fuse is typically 8In to 10In (i.e., 8 to 10 times the rated current, where the rated current is the fuse's rated current). When the minimum breaking current of a fuse is set to 5In, if the fuse's rated current In > 400A, then 5In > 2kA, resulting in a protection blind zone that prevents breaking, thereby reducing the reliability of the energy storage system and posing a safety hazard.

[0046] To address this, this application provides a high-voltage box installed in the power supply branch of an energy storage system. The power supply branch includes at least one battery pack and the high-voltage box. The high-voltage box includes a first fuse, a first switching device, and an interface group. The first switching device includes a first terminal, a second terminal, a third terminal, and a fourth terminal. The interface group includes a first interface, a second interface, a third interface, and a fourth interface. The first fuse and the first switching device are located in the main circuit of the high-voltage box. The rated current of the first fuse is set to be less than or equal to a preset first current. The product of the first breaking capacity of the first fuse and the first current is less than or equal to the first breaking current of the first switching device. This avoids protection blind spots in the protection devices of the high-voltage box. Furthermore, the first switching device can be used for protection when a small fault current occurs in the energy storage system, and the first fuse can be used for protection when a large fault current occurs. This achieves global fault protection for the energy storage system and improves the safety performance of the energy storage system.

[0047] Please see Figure 1 and Figure 2 , Figure 1 This is a first internal circuit diagram of a high-voltage box provided in an embodiment of this application; Figure 2 This is a second internal circuit diagram of a high-voltage box provided in an embodiment of this application.

[0048] like Figure 1 and Figure 2 As shown, this application provides a high-voltage box 10, which is disposed in the power supply branch 1 of an energy storage system. The power supply branch 1 includes at least one battery pack 20 and the high-voltage box 10; the high-voltage box 10 includes:

[0049] First fuse FU+;

[0050] The first switching device K1 has a first terminal A and a second terminal B, and the first terminal A is electrically connected to one end of the first fuse FU+.

[0051] The interface group includes interface B+, interface B-, interface P+, ​​and interface P-.

[0052] Wherein, the first end A is electrically connected to one end of the first fuse FU+, the other end of the first fuse FU+ is electrically connected to one end of the first interface B+, the second end B is electrically connected to one end of the third interface P+, ​​and one end of the second interface B- is electrically connected to one end of the fourth interface P-; or, the first end A is electrically connected to one end of the first interface B+, the second end B is electrically connected to one end of the third interface P+, ​​one end of the first fuse FU+ is electrically connected to one end of the second interface B-, and the other end of the first fuse FU+ is electrically connected to one end of the fourth interface P-;

[0053] The other ends of the first interface B+ and the second interface B- are electrically connected to the two ends of the battery pack 20, respectively; the other ends of the third interface P+ and the fourth interface P- are electrically connected to the first bus and the second bus, respectively.

[0054] Wherein, the rated current of the first fuse FU+ is less than or equal to the first current, and the product between the first breaking ratio of the first fuse FU+ and the first current is less than or equal to the first breaking current of the first switching device K1.

[0055] In this application, the first fuse FU+ can be a conventional passive fuse or a Pyro fuse, i.e., a smart fuse. The first breaking capacity can be understood as the minimum breaking capacity of the first fuse FU+. The first switching device K1 can be one or more of a circuit breaker QF, a disconnector, a fusion switch QF1, and a relay. At least one of the circuit breaker QF, the disconnector, and the fusion switch QF1 can be equipped with a tripping device. The first breaking current can be understood as the maximum breaking current of the first switching device K1.

[0056] The breaking current of the first fuse FU+ can be obtained by multiplying the rated current of the first fuse FU+ by its breaking capacity. Since the rated current of the first fuse FU+ provided in this application is less than or equal to the first current, and the product of the first breaking capacity of the first fuse FU+ and the first current is less than or equal to the first breaking current of the first switching device K1, the product of the first breaking capacity of the first fuse FU+ and the rated current of the first fuse FU+ must also be less than or equal to the first breaking current of the first switching device K1. That is, the minimum breaking current of the first fuse FU+ is less than or equal to the first breaking current of the first switching device K1, thereby avoiding the existence of a protection blind zone in the power supply branch where the high-voltage box is located, and thus improving the safety and reliability of the energy storage system. The first current can be 400A.

[0057] The high-voltage box 10 provided in this application includes a first fuse FU+, a first switching device K1, and an interface group. The first switching device K1 has a first terminal A and a second terminal B. The interface group includes a first interface B+, a second interface B-, a third interface P+, ​​and a fourth interface P-. The first fuse FU+ and the first switching device K1 are located in the main circuit of the high-voltage box 10. The rated current of the first fuse FU+ is set to be less than or equal to a first current, and the product between the first breaking capacity of the first fuse FU+ and the first current is less than or equal to the first breaking current of the first switching device K1. This avoids the existence of protection blind spots in the protection devices in the high-voltage box. Thus, when a small fault current occurs in the energy storage system, the first switching device K1 can be used for protection, and when a large fault current occurs, the first fuse FU+ can be used for protection. This achieves global fault protection for the energy storage system and improves the safety performance of the energy storage system.

[0058] In some embodiments, the first breaking capacity of the first fuse FU+ is less than or equal to a preset first threshold, the first breaking current of the first switching device K1 is greater than or equal to a preset second current, and the ratio between the second current and the rated current of the first fuse FU+ is greater than or equal to the first threshold and less than or equal to the second breaking capacity of the first fuse.

[0059] Specifically, the first breaking capacity ratio can be understood as the minimum breaking capacity ratio of the first fuse FU+, and the second breaking capacity ratio can be understood as the maximum breaking capacity ratio of the first fuse FU+. This application sets the minimum breaking capacity ratio of the first fuse FU+ to be less than or equal to a preset first threshold, while the first threshold is less than or equal to the ratio between the second current and the rated current of the first fuse FU+. The first breaking capacity ratio of the first fuse FU+ is less than or equal to the first threshold, and the ratio between the second current and the rated current of the first fuse FU+ is less than or equal to the second breaking capacity ratio of the first fuse. Therefore, when the fault current of the energy storage system is less than or equal to the second current, the first switching device K1 is used for protection, and when the fault current is greater than the second current, the first fuse FU+ is used for protection. This achieves global fault protection for the energy storage system, avoids blind spots in the protection devices of the high-voltage box 10, and improves the safety performance of the energy storage system.

[0060] Meanwhile, the minimum breaking capacity of the first fuse FU+ mentioned in this application can be determined by the ratio between the minimum breaking current of the first fuse FU+ and its rated current. The first threshold can be 5, and the second current can be 5000A.

[0061] In some embodiments, when the fault current of the high-voltage box 10 is less than or equal to the second current, the breaking speed of the first fuse FU+ is less than or equal to the breaking speed of the first switching device K1; when the fault current is greater than the second current, the breaking speed of the first fuse FU+ is greater than the breaking speed of the first switching device K1.

[0062] In this application, when the fault current of the high-voltage box 10 is less than or equal to the second current, the breaking speed of the first fuse FU+ is less than or equal to the breaking speed of the first switching device K1. This allows the first switching device K1 to break first, thus preventing the first fuse FU+ from breaking before the first switching device K1. This reduces the number of times the first fuse FU+ needs to be replaced. At the same time, when the fault current is greater than the second current, the breaking speed of the first fuse FU+ is greater than the breaking speed of the first switching device K1. This ensures that when the fault current is greater than the second current, the first fuse FU+ is used first to break, thus preventing the failure of the first switching device K1 from preventing the main circuit of the high-voltage box 10 from being cut off.

[0063] In some embodiments, such as Figure 3 , Figure 5 and Figure 6As shown, the first switching device K1 includes a circuit breaker QF, a disconnector QS, a fusion switch QF1, or a second fuse FU-; wherein, the first terminal A and the second terminal B are provided on the circuit breaker QF, the disconnector QS, the fusion switch QF1, or the second fuse FU-; when the fault current of the high-voltage box 10 is less than or equal to the second current, the breaking speed of the circuit breaker QF, the breaking speed of the disconnector QS, the breaking speed of the fusion switch QF1, or the breaking speed of the second fuse FU- is greater than or equal to the breaking speed of the first fuse FU+.

[0064] Specifically, this application can use circuit breaker QF, disconnector QS, fusion switch QF1, or second fuse FU- as the first switching device K1. Then, when the fault current of the high-voltage box 10 is less than or equal to the second current, the breaking speed of circuit breaker QF, disconnector QS, fusion switch QF1, or second fuse FU- can be used to disconnect the main circuit of the high-voltage box 10. When the fault current of the high-voltage box 10 is greater than the second current, the first fuse FU+ can be used to disconnect the main circuit of the high-voltage box 10, thus achieving global fault protection for the energy storage system and improving the safety performance of the energy storage system.

[0065] It should be noted that the second fuse FU- can be a smart fuse. The second fuse FU- can be used as the first switching device K1 or can be used independently of the first switching device K1. It can be selected according to the actual application, and this application does not make specific limitations.

[0066] In some embodiments, such as Figure 3 , Figure 5 and Figure 6 As shown, the circuit breaker QF, the disconnector QS, or the fusion switch QF1 is equipped with a tripping device. The ratio between the instantaneous tripping current and the rated current of the circuit breaker QF, or the ratio between the instantaneous tripping current and the rated current of the disconnector QS, or the ratio between the instantaneous tripping current and the rated current of the fusion switch QF1 is greater than or equal to a preset second threshold and less than or equal to a preset third threshold.

[0067] In this application, the circuit breaker QF, disconnector QS, or fusion switch QF1 is equipped with a tripping device to interrupt fault current in the energy storage system. A tripping device is an electrical protection device that automatically triggers a switch (such as a circuit breaker QF, contactor, etc.) to disconnect the circuit when abnormal conditions such as overload, short circuit, or undervoltage occur, thereby protecting the circuit and equipment from damage. Common tripping devices include thermal trip units, electromagnetic trip units, and composite trip units (i.e., electronic trip units). Thermal trip units utilize the thermal effect of current, triggering the tripping mechanism through the deformation of a bimetallic strip, and are suitable for overload protection. Electromagnetic trip units utilize the magnetic effect of current, triggering the tripping mechanism through the magnetic field generated by an electromagnet, and are suitable for short circuit protection. Composite trip units combine thermal and electromagnetic tripping functions, providing dual protection against overload and short circuit. Electronic trip units use electronic circuits to detect changes in current and voltage, controlling the tripping mechanism through electronic signals, offering higher accuracy and flexibility.

[0068] Specifically, this application sets the ratio between the instantaneous tripping current and the rated current of circuit breaker QF, or the ratio between the instantaneous tripping current and the rated current of disconnector QS, or the ratio between the instantaneous tripping current and the rated current of fusion switch QF1 to be no less than a second threshold and no greater than a third threshold. This allows the first switching device K1 to trip when the fault current is less than or equal to the second current. The second threshold can be 5, and the third threshold can be 10.

[0069] Furthermore, in some embodiments, the second threshold is less than or equal to the first threshold, and the first threshold is less than or equal to the third threshold.

[0070] Specifically, this application sets the first threshold between the second and third thresholds, thereby enabling protection by using a circuit breaker QF, a disconnector QS, or a fusion switch QF1 when the fault current of the energy storage system is equal to or greater than the second current, and by using a first fuse FU+ when the fault current is greater than the second current. This achieves global fault protection for the energy storage system, avoids blind spots in the protection devices in the high-voltage box 10, and improves the safety performance of the energy storage system.

[0071] In some embodiments, such as Figure 3 As shown, the circuit breaker QF has a first terminal A, a second terminal B, a third terminal C, and a fourth terminal D. The circuit breaker QF is equipped with a tripping device; the third terminal C is electrically connected to one end of the second interface B-, and the fourth terminal D is electrically connected to one end of the fourth interface P-.

[0072] Specifically, in the process of selecting the circuit breaker QF, this application, such as Figure 4As shown, the tripping curve of circuit breaker QF can be matched with the pre-arc curve of the first fuse FU+. The curve of the first fuse FU+ shows a slower initial action and a faster later action, while the tripping curve of circuit breaker QF shows thermal tripping in the early stage, a slower initial action and a faster later action, and finally magnetic tripping. The tripping time is fixed. Figure 4 As can be seen from the data, the intersection of the two curves is 5kA. When the fault current is ≤5kA, the tripping curve of the circuit breaker QF acts faster, and the fault current is protected by the circuit breaker QF. When the fault current is >5kA, the arc-preceding curve of the fuse acts faster, and the fault current is protected by the fuse.

[0073] It should be noted that, Figure 4 The current at the intersection of the two curves exceeds the minimum breaking current of the fuse. This application uses a combination of circuit breaker QF and first fuse FU+ to eliminate protection blind spots and achieve full-range fault protection for the energy storage system. Furthermore, the circuit breaker QF must be UL and IEC certified during the selection process.

[0074] In some embodiments, such as Figure 5 As shown, the disconnector switch QS has a first terminal A, a second terminal B, a third terminal C, and a fourth terminal D. The disconnector switch QS is equipped with a tripping device; the third terminal C is electrically connected to one end of the second interface B-, and the fourth terminal D is electrically connected to one end of the fourth interface P-.

[0075] In this application, the disconnector switch QS is widely used due to its strong withstand capability, but it lacks breaking capacity. Therefore, this application upgrades the disconnector switch QS by replacing it with a disconnector switch QS equipped with a tripping device. This allows the disconnector switch to have a strong breaking capacity similar to that of the circuit breaker QF while retaining its strong withstand capability. Thus, when the fault current of the energy storage system is equal to or greater than the second current, the disconnector switch QS can be used for protection, and when the fault current is greater than the second current, the first fuse FU+ can be used for protection. This enables global fault protection for the energy storage system, avoids protection blind spots in the protection devices of the high-voltage box 10, and improves the safety performance of the energy storage system.

[0076] Meanwhile, the breaking capacity of the disconnecting switch QS mentioned in this application must be at least greater than the maximum short-circuit current of the high-voltage cluster and the minimum breaking current of the fuse.

[0077] In addition, after the disconnector switch QS is upgraded to a disconnector switch with a tripping device, it can also be equipped with a shunt trip accessory function to achieve linkage with the battery management system. When the battery management system detects a fault current exceeding a certain threshold, for example, a fault current ≥ 1.3 times the rated current of the first fuse FU+, the battery management system executes a tripping procedure, which can drive the disconnector switch QS to shunt trip and disconnect the faulty circuit.

[0078] It should be noted that the delay time involved in the process from the battery management system receiving a fault signal to issuing a command to the trip unit receiving the signal and starting to execute it must be less than the pre-arc fuse time of the first fuse FU+. At the same time, the pre-arc curve current value of the fuse corresponding to the delay time must be less than the minimum breaking current of the first fuse FU+.

[0079] In some embodiments, such as Figure 1 and Figure 2 As shown, one end of the second fuse FU- is electrically connected to one end of the second interface B-, and the other end of the second fuse FU- is electrically connected to one end of the fourth interface P-.

[0080] In this application, the first fuse FU+ is located between the first interface B+ and the third interface P+, ​​and the second fuse FU- is located between the second interface B- and the fourth interface P-. The first fuse FU+ and the second fuse FU- can be the main and negative fuses in the high-voltage box 10, thereby providing more reliable circuit protection for the high-voltage box 10 and ensuring that the circuit in the high-voltage box 10 can be effectively cut off under different fault conditions.

[0081] Furthermore, in some embodiments, when the fault current of the high-voltage box 10 is less than or equal to the second current, the breaking speed of the second fuse FU- is greater than or equal to the breaking speed of the first switching device K1; when the fault current is greater than the second current, the breaking speed of the second fuse FU- is less than the breaking speed of the first switching device K1.

[0082] In this application, the first fuse FU+ and the second fuse FU- can be a smart fuse and a traditional passive fuse, respectively. That is, this application can adjust the two traditional passive fuses at the positive and negative poles in the high-voltage box 10 to Pyro fuses and traditional passive fuses. Traditional passive fuses have a significant advantage in melting quickly when the short circuit current is large, but they have limitations in melting when the short circuit current is small, and they cannot melt in time, or even if the melting time is too long, there is a risk of tube explosion.

[0083] Therefore, this application replaces the two conventional passive fuses at the positive and negative terminals inside the high-voltage box 10 with Pyro fuses and conventional passive fuses, which can solve the risk of blank protection for small short-circuit currents. The Pyro fuse, also known as a smart fuse, is an integrated active and passive device. When any fault current occurs, the battery management system detects the fault current signal and sends an excitation signal to the Pyro fuse. Upon receiving the external excitation signal, the Pyro fuse activates the igniter, cutting off the internal connection circuit, thereby achieving rapid interruption of the circuit current.

[0084] In addition, Pyro fuses can internally detect fault currents and send excitation signals to trigger the circuit, forming an integrated active and passive protection scheme to ensure the safety and reliability of the energy storage system. When selecting Pyro fuses, they must possess certifications such as UL and IEC.

[0085] In some embodiments, such as Figure 6 and Figure 7 As shown, the fusion switch QF1 has a first terminal A, a second terminal B, a third terminal C, and a fourth terminal D. The third terminal C is electrically connected to one end of the second interface B-, and the fourth terminal D is electrically connected to one end of the fourth interface P-.

[0086] Specifically, this application can cover the minimum breaking capacity of the first fuse FU+ by setting a fusion switch QF1 in the high-voltage box 10. At the same time, the fusion switch QF1 adopts a modular design, which can reduce the size of the high-voltage box 10 and achieve the purpose of reducing the cost of the energy storage system.

[0087] Furthermore, in some embodiments, the second breaking current of the fusion switch QF1 is greater than or equal to the second current.

[0088] In this application, the second breaking current can be understood as the maximum breaking current of the fusion switch QF1. The main contacts of the fusion switch QF1 can replace the power-on and power-off functions of the relay in the high-voltage box 10. The breaking capacity of the fusion switch QF1 can reach 20kA, which is greater than 2kA. This avoids the limitation of the relay's breaking capacity. When the fault current of the energy storage system is equal to or equal to the second current, the fusion switch QF1 is used for protection. When the fault current is greater than the second current, the first fuse FU+ is used for protection. This enables global fault protection of the energy storage system, avoids the protection blind zone of the protection devices in the high-voltage box 10, and improves the safety performance of the energy storage system.

[0089] Furthermore, in some embodiments, the third breaking current of the first fuse FU+ is less than or equal to a preset third current, the third breaking current is greater than the first breaking current, and the second breaking current of the fusion switch QF1 is greater than or equal to the third current.

[0090] In this application, the third breaking current can be understood as the maximum breaking current of the first fuse FU+. The maximum breaking current of the first fuse FU+ is less than or equal to the preset third current. At the same time, the second breaking current of the fusion switch QF1, that is, the maximum breaking current of the fusion switch QF1, can be greater than or equal to the third current. Therefore, when performing full-area protection of the energy storage system, only the fusion switch QF1 can be used for protection, thereby reducing the number of fuse replacements in the high-voltage box 10.

[0091] In some embodiments, such as Figure 6 As shown, the tripping device provided with the fusion switch QF1 may include a motor tripping device and / or a shunt tripping device.

[0092] In this application, the fusion switch QF1 may be equipped with accessories such as a motor trip device and / or a shunt trip device. Both the motor trip device and the shunt trip device can realize remote tripping operation. The circuits of the motor trip device and the shunt trip device are independent, thereby realizing the tripping redundancy control function. In this way, the fusion switch QF1 can be guaranteed to operate normally in the event of power loss or a single fault in the active circuit.

[0093] Meanwhile, the protection mechanism of the integrated switch QF1 is similar to that of the circuit breaker QF protection. Both the motor tripping device and the shunt tripping device can be linked with the battery management system's protection strategy. When the battery management system detects a fault current exceeding a certain threshold, for example, a fault current ≥ 1.3 times the rated current of the first fuse FU+, the battery management system executes a tripping procedure, which can activate the motor tripping device or the shunt tripping device within the integrated switch QF1 to disconnect the faulty circuit. The integrated switch QF1 must possess UL, IEC, and other certifications during the selection process.

[0094] In some embodiments, such as Figure 6 and Figure 7 As shown, the fusion switch QF1 is equipped with a first relay KM+. One end of the first relay KM+ is electrically connected to the first terminal A, and the other end of the first relay KM+ is electrically connected to the second terminal B.

[0095] In this application, the first relay KM+ can be the main positive relay inside the high-voltage box 10. The main positive relay is used to control the on / off state of the high-voltage circuit, ensuring that the circuit can be quickly cut off when needed to prevent faults such as overload and short circuit. At the same time, before the main relay operates, a self-test is performed through the pre-charge circuit to prevent the large current at the moment of power-on from damaging other electronic components in the high-voltage system.

[0096] Specifically, the first relay KM+ is located within the fusion switch QF1, meaning that the first relay KM+ can be integrated into the fusion switch QF1. The main positive contact of the fusion switch QF1 can replace the function of the first relay KM+. Thus, when the fault current of the energy storage system is equal to or equal to the second current, the first relay KM+ integrated into the fusion switch QF1 can be used for protection. When the fault current is greater than the second current, the first fuse FU+ can be used for protection. This enables global fault protection for the energy storage system, avoids blind spots in the protection devices in the high-voltage box 10, and improves the safety performance of the energy storage system.

[0097] It should be noted that the first relay KM+ can also be independent of the fusion switch, and it can be selected according to the actual application. This application does not make any specific restrictions.

[0098] In some embodiments, such as Figure 6 and Figure 7 As shown, the high-voltage box 10 also includes a pre-charging circuit, the two ends of which are electrically connected to the two ends of the first relay KM+.

[0099] In this application, a pre-charging circuit can be provided inside the high-voltage box 10. The pre-charging circuit can cooperate with the first relay KM+ to enable the high-voltage box 10 to be powered on.

[0100] In some embodiments, the pre-charging circuit includes a pre-charging relay KM and a pre-charging resistor R; wherein, one end of the pre-charging relay KM is electrically connected to one end of the first relay KM+ and one end of the first fuse FU+, the other end of the pre-charging relay KM is electrically connected to one end of the pre-charging resistor R, and the other end of the pre-charging resistor R is electrically connected to the other end of the first relay KM+ and the second end B.

[0101] Furthermore, in some embodiments, such as Figure 6 and Figure 7 As shown, the precharge relay KM is located inside the fusion switch QF1.

[0102] In this application, the pre-charge relay KM can also be integrated into the fusion switch QF1, so that when the high-voltage box 10 needs to be powered on, the fusion switch QF1 can be used to power on, thereby avoiding damage to electronic components.

[0103] In some embodiments, such as Figure 6 and Figure 7 As shown, the high-voltage box 10 also includes a second relay KM-, one end of the second relay KM- is electrically connected to one end of the second interface B-, and the other end of the second relay KM- is electrically connected to the third terminal C.

[0104] In this application, the second relay KM- can be the main negative relay in the high-voltage box 10. The main negative relay is a key relay on the negative side of the high-voltage system. The operation of the main negative relay is usually completed in conjunction with the pre-charging circuit and the main positive relay. The main negative relay is responsible for connecting the negative terminal of the battery to the negative terminal of the external load or charger. At the same time, by controlling the closing and opening of the main negative relay, it can be determined whether the high-voltage circuit forms a closed loop, thereby realizing the on-off control of the high-voltage circuit.

[0105] In some embodiments, such as Figure 6 and Figure 7 As shown, the second relay KM is located inside the fusion switch QF1.

[0106] In this application, the second relay KM- can be integrated into the fusion switch QF1. The main negative contact of the fusion switch QF1 can replace the function of the second relay KM-, and thus can power on the high voltage box 10 together with the first relay KM+ and the pre-charging circuit.

[0107] Furthermore, this application can integrate the first relay KM+, the second relay KM-, and the pre-charge relay KM into the fusion switch QF1, thereby reducing the size of the high-voltage box 10. For example... Figure 8 and Figure 9 As shown, Figure 8 This is a schematic diagram showing the connection between the first relay KM+, the second relay KM-, and the precharge relay KM, which are not integrated into the fusion switch QF1, and the main control board of the battery management system. Figure 9 This diagram shows the integration of the first relay KM+, the second relay KM-, and the precharge relay KM within the fusion switch QF1, and their connection to the main control board of the battery management system.

[0108] Traditional solutions require one disconnecting switch, two main negative relays, two fuses, one pre-charge relay KM, one pre-charge resistor R, and one Hall sensor HALL. However, by integrating the first relay KM+, the second relay KM-, and the pre-charge relay KM into the fusion switch QF1, only one disconnecting switch, two fuses, one pre-charge resistor R, and one Hall sensor HALL are needed. Therefore, it can be seen that the use of the fusion switch QF1 in this application can reduce the structural complexity of the high-voltage box 10 and also reduce installation time, thereby achieving the goal of saving costs for the energy storage system.

[0109] At the same time, from Figure 8 and Figure 9As can be seen, the traditional battery management system has a total of 7 interfaces in its control loop: 4 high-side drivers and 3 DI interfaces. In contrast, the QF1 integrated switch solution only requires 4 interfaces: 3 high-side drivers and 1 DI interface. It can be seen that using the QF1 integrated switch can save 3 interfaces and also optimize the control circuit.

[0110] The control circuit principle of the traditional battery management system is as follows: the coil drives of the main positive and negative relays, precharge relay KM, shunt intermediate relay, etc. are all controlled by the high-side drive signal of the battery management system to turn on and off, that is, on when high level, off when low level; the auxiliary contacts of the main positive and negative relays and circuit breaker QF are connected to the DI feedback signal interface of the battery management system to identify the switching status of the main positive and negative relays and circuit breaker QF; the shunt tripping function of circuit breaker QF is driven by the contacts of the shunt intermediate relay, which solves the problem of insufficient direct drive power of the battery management system.

[0111] The control circuit principle of the battery management system (BMS) using the integrated switch QF1 scheme is as follows: The integrated switch QF1 contains a main charging switch and a pre-charging switch, which are controlled by a motor trip to open and close. The opening and closing time can be 2 seconds. The high-side drive point of the BMS continuously sends a high-level signal (greater than 2 seconds) to the internal electric operating mechanism of the integrated switch QF1 for 3 seconds. The high level is between 19.2V and 28.8V, and the low level is between 0V and 4.5V. The high and low level strategies are as follows: Low level input to both the main charging switch and the pre-charging switch: pre-charging fully open, main charging fully open; low level input to both the main charging switch and the pre-charging switch: pre-charging closed, main charging fully open; high level input to both the main charging switch and the pre-charging switch: pre-charging closed, main charging fully open; high level input to both the main charging switch and the pre-charging switch: pre-charging fully open, main charging closed. It can be seen that the control circuit of the BMS using the integrated switch QF1 scheme in this application requires fewer control points, has a lower failure rate, and a simpler execution strategy.

[0112] In some embodiments, such as Figure 2 As shown, the high-voltage box 10 also includes a shunt SH, which is located on the line between the first interface B+ and the third interface P+, ​​or on the line between the second interface B- and the fourth interface P-.

[0113] In some embodiments, such as Figure 7 As shown, the high-voltage box 10 also includes a Hall sensor HALL, which is located on the line between the first interface B+ and the third interface P+, ​​or on the line between the second interface B- and the fourth interface P-.

[0114] Specifically, this application enables current acquisition of the battery cluster located in the high-voltage box 10 by installing a shunt SH and / or a Hall sensor HALL inside the high-voltage box 10. Simultaneously, the shunt SH and / or the Hall sensor HALL can be placed at the negative terminal, where the negative potential is lower, isolation requirements are less stringent, circuit design is simpler, cost may be lower, and the risk of electric shock or short circuit can be reduced.

[0115] In some embodiments, such as Figure 10 As shown, this application also provides an energy storage system, which includes at least one power supply branch 1, the power supply branch 1 including at least one battery pack 20 and the high voltage box 10 provided in this application.

[0116] In this application, by setting multiple battery packs 20 in each power supply branch 1, and while each battery pack 20 is connected in series, a fuse and / or a relay can also be connected in series to form a battery cluster, which can not only increase the voltage of the power supply branch 1, but also enhance the safety performance of the power supply branch 1.

[0117] In some embodiments, such as Figure 10 As shown, the energy storage system includes a second switching device K2 and N power supply branches 1, where N is a positive integer greater than or equal to 2, i.e., N is a natural number greater than 1; wherein, the N power supply branches 1 are connected in parallel and then electrically connected to the target device through the second switching device K2.

[0118] In this application, the second switching device K2 can be a disconnecting switch, and the target device can be an energy storage converter. The PCS+ and PCS- interfaces of the second switching device K2 are electrically connected to the energy storage converter, respectively. By setting a disconnecting switch between the energy storage converter and the high-voltage box 10, the main circuit of the energy storage system can be disconnected by the second switching device K2 when the high-voltage box 10 cannot be disconnected, thereby further ensuring the safety performance of the energy storage system.

[0119] Furthermore, in some embodiments, the fourth breaking current of the second switching device K2 is greater than N times the third breaking current of the first fuse FU+.

[0120] Specifically, this application can also solve the protection blind zone problem of the high-voltage box 10 by using the second switching device K2. By setting the fourth breaking current of the second switching device K2 to be greater than N times the third breaking current of the first fuse FU+, the second switching device K2 can be used to break the fault when the fault current of the power supply branch 1 is less than or equal to the minimum breaking current of the first fuse FU+; and the first fuse FU+ can be used to break the fault when the fault current of the power supply branch 1 is greater than the minimum breaking current of the first fuse FU+. This can avoid the occurrence of a protection blind zone when the protection devices in the high-voltage box 10 are used to protect the energy storage system.

[0121] In this embodiment, the breaking capacity of the second switching device K2 needs to be decomposed to the power supply branch 1 layer. If there are N power supply branches 1 in the energy storage system, then the current after N times the maximum breaking current of the second switching device K2, i.e., the third current, needs to be greater than the minimum breaking current of the first fuse FU+. Thus, when the fault current of the power supply branch 1 is less than or equal to the minimum breaking current of the first fuse FU+, the second switching device K2 can be used for breaking; when the fault current of the power supply branch 1 is greater than the minimum breaking current of the first fuse FU+, the first fuse FU+ can be used for breaking. This avoids the occurrence of protection blind spots when using the protection devices in the high-voltage box 10 to protect the energy storage system.

[0122] In some embodiments, such as Figure 10 As shown, the battery pack 20 includes a third fuse FU and at least one battery cell. The minimum breaking current of the third fuse FU is greater than or equal to the minimum breaking current of the first fuse FU+. The third fuse FU and at least one battery cell are connected in series and electrically connected to one end of the battery pack 20 and the other end of the battery pack 20, respectively. Alternatively, the third fuse FU and the battery cell are connected in series one-to-one and electrically connected to one end of the battery pack 20 and the other end of the battery pack 20, respectively, to achieve parallel connection. This allows the third fuse FU to quickly and effectively interrupt short circuits in the battery pack 20. The circuit containing battery pack 20 is disconnected in a timely manner to ensure the safety of battery pack 20. At the same time, the minimum breaking current of the third fuse FU can be greater than or equal to the minimum breaking current of the first fuse FU+, thereby avoiding the third fuse FU blowing before the first fuse FU+FU1. This reduces the number of times the third fuse FU needs to be replaced when replacing the fuses in the power supply branch 1, and thus reduces the number of times battery pack 20 needs to be disassembled and reassembled, greatly improving the maintenance efficiency of the energy storage system and reducing the maintenance cost of the energy storage system.

[0123] Furthermore, in some embodiments, the fusing speed of the first fuse FU+ is greater than the fusing speed of the third fuse FU.

[0124] In this implementation, the melting speed of the first fuse FU+ is greater than that of the third fuse FU. When both the first fuse FU+ and the third fuse FU meet the conditions for breaking, the first fuse FU+ will melt first, thereby avoiding increasing the number of times the battery pack 20 needs to be disassembled and reassembled.

[0125] In some embodiments, the target device is an energy storage converter; the energy storage converter can control the charging and discharging process of the power supply branch 1 and perform AC-DC conversion, and can also directly supply power to AC loads in the absence of a power grid.

[0126] It is understood that the high-voltage box and energy storage system provided in the above embodiments are merely examples. The description of the high-voltage box and energy storage system in this application is to more clearly illustrate the technical solutions of the embodiments of this application, and does not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the evolution of high-voltage boxes and energy storage systems and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems. Detailed descriptions are provided below.

[0127] In related technologies, the selection and installation standards for key components inside the high-voltage box of energy storage systems are not rigorous enough, resulting in insufficient effectiveness of the device's protection mechanism and failure to meet the protection requirements of the energy storage system. Specifically, this manifests as: insufficient matching between the overcurrent protection threshold setting and the device's tolerance parameters, and the insulation coordination coefficient failing to meet industry standards, leading to reliability defects in the overall protection system and consequently poor safety performance of the energy storage system.

[0128] Therefore, this application provides a design method for a high-voltage box. This method obtains the design information of the high-voltage box, determines the category of each component inside the high-voltage box based on the design information, then determines the selection method of the component based on the category, and finally selects the component based on the selection method to determine the parameter information of the component. This can limit the key parameters of the components inside the high-voltage box, optimize the interlocking mechanism and installation method of the protection strategy of the energy storage system, so that the designed high-voltage box can meet the requirements of the energy storage system after being applied to the energy storage system, ensuring the safe operation of the energy storage system.

[0129] Before detailing the design method of the high-voltage box provided in this application, this application first describes the application scenarios of the high-voltage box design method. The high-voltage box design method provided in the embodiments of this application can be applied to electronic devices.

[0130] The design method of the high-voltage box provided in this application will be described in detail below.

[0131] like Figure 11 As shown, the method includes the following steps S110 to S140.

[0132] S110. Obtain the design information for the high-voltage box;

[0133] S120. Based on the design information, determine the categories of each component inside the high-voltage box;

[0134] S130. Determine the selection method for the components based on their category;

[0135] S140. Select the appropriate device based on the selection method to determine the device's parameter information.

[0136] In this application, design information can be understood as the relevant data information for designing a high-voltage box for use in an energy storage system. This data information needs to meet the control and protection requirements for battery charging and discharging. Design information may include the functional and dimensional information of the high-voltage box. The categories of components can be understood as the types of components within the high-voltage box, such as primary components, secondary components, and other components. Primary components include high-voltage circuit breakers, load switches, disconnect switches, fuses, current transformers, voltage transformers, busbars, etc., which directly participate in the transmission and distribution of electrical energy and bear high-voltage current and voltage. Secondary components include relays, microprocessor-based protection devices, electricity meters, ammeters, voltmeters, indicator lights, control buttons, changeover switches, fuses, air switches, etc., which are mainly responsible for the control, monitoring, protection, and signal indication functions of primary equipment. Other components include insulating parts (wall bushings, contact boxes, insulators, etc.), grounding busbars, heating devices, connectors, etc., used to ensure the normal operation and safety performance of the high-voltage box.

[0137] Specifically, after obtaining the design information of the high-voltage box, this application can determine the categories of each component inside the high-voltage box based on the design information. After determining the category of each component, the selection method of the corresponding component can be determined based on its category. Thus, the selection method of each component can be determined, and the component can be selected according to the selection method to determine the parameter information of the component. This limits the key parameters of the components inside the high-voltage box, optimizes the interlocking mechanism and installation method of the protection strategy of the energy storage system, and ensures that the designed high-voltage box can meet the requirements of the energy storage system after being applied to the energy storage system, thus ensuring the safe operation of the energy storage system.

[0138] In some embodiments, the device is selected according to the selection method to determine the device's parameter information, including: determining the attribute information of the energy storage system according to the design information; and selecting the device according to the selection method based on the attribute information of the energy storage system to determine the device's parameter information.

[0139] In this application, during the process of selecting components according to the selection method to determine the component parameter information, the attribute information of the energy storage system can be determined in advance based on the design information. This allows for the acquisition of the energy storage system's application scenario, electrical parameters, control and protection requirements, as well as its size and installation method. The attribute information can include at least one of the following: application scenario information, electrical parameter information, control information, protection requirement information, and size and installation method. Based on this, the corresponding selection method for each component can be used to select components, thereby limiting the key parameters of the components inside the high-voltage box, optimizing the interlocking mechanism and installation method of the energy storage system's protection strategy. This ensures that after the designed high-voltage box is applied to the energy storage system, all protection indicators of the high-voltage box meet the requirements of the energy storage system, guaranteeing the safe operation of the energy storage system.

[0140] In some embodiments, the selection method includes the rated current of the device; based on the attribute information of the energy storage system, the selection method is used to select the device to determine the parameter information of the device, including: determining the rated current of the device according to the attribute information of the energy storage system; and selecting the device according to the rated current of the device to determine the parameter information of the device.

[0141] Specifically, in the process of selecting devices based on the attribute information of the energy storage system, this application can determine the peak current of the energy storage system through the attribute information, and then determine the rated current of each device based on this, and select devices based on the rated current of the devices, so as to determine the specific value of the minimum rated current required by each device in the energy storage system, i.e., parameter information, and then realize the design of each device of the high-voltage box based on this.

[0142] The peak current of the energy storage system can be determined based on the capacity of the battery cells, the charge / discharge rate of the system, and the rated voltage of the cells. For example, if the battery cell capacity is 314Ah, the rated voltage is 3.2V, the charge / discharge voltage is 2.5V, and the charge / discharge rate is 1P, then the peak current Irms can be calculated as follows: Irms = 314 * 1 * (3.2 / 2.5) = 402A.

[0143] In this application, when selecting devices based on their rated current to determine their parameter information, the operating conditions of the energy storage system also need to be considered. For example, if the rated current of the device (high-voltage circuit breaker) is determined to be 500A, and considering the possible short-term overload and fault current of the energy storage system, its short-circuit breaking capacity needs to reach more than 800A. In this case, 800A can be used as the parameter information.

[0144] In some embodiments, determining the rated current of a device based on the attribute information of the energy storage system includes: determining the peak current of the energy storage system and the derating factor of the device based on the attribute information of the energy storage system; the derating factor of the device includes at least one of temperature derating factor, cable derating factor at both ends of the device, and altitude derating factor; and determining the rated current of the device based on the peak current of the energy storage system and the derating factor of the device.

[0145] In this application, during the process of determining the rated current of a device based on the attribute information of the energy storage system, at least one of the following is considered: derating factor of each device, derating factor of temperature, derating factor of cables at both ends of the device, and derating factor of altitude. After determining the peak current of the energy storage system and the derating factor of the device based on the attribute information of the energy storage system, the rated current of the device can be determined based on the peak current and the derating factor of the device.

[0146] For example, taking a fuse as an example: the maximum ambient temperature is 55℃, the altitude h = 3000m, and the copper busbars connected to both ends of the fuse are 40*6mm (cross-sectional area S = 240mm²). 2 ).

[0147] The temperature derating factor Kt and the ambient temperature T satisfy the formula: Kt=-0.0046*T+1.0725. Substituting the ambient temperature T=55℃ into the formula, the temperature derating factor Kt is equal to 0.82.

[0148] The cable connection derating factor Ke and the cable connection cross-sectional area S satisfy the following formula: Ke = 0.374 * 1.3 / Irms * S + 0.6792. Substituting the peak current Irms = 401A and S = 240mm2, we get the cable connection derating factor Ke as 0.97.

[0149] The altitude reduction factor Ka and altitude h satisfy the following formula relationship: Substituting the altitude h = 3000m into the equation, we get the altitude reduction coefficient Ka = 0.95.

[0150] Meanwhile, the peak current of the energy storage system and the derating factor of the device are used to determine the rated current of the device. The formula In=Irms / Kt / Ke / Ka can be used to determine the rated current of the fuse, which is 526A. In order to ensure a certain margin, the rated current of the fuse can be selected as 550A or 630A.

[0151] For example, taking a circuit breaker as an example: the battery cell capacity is 314Ah, the energy storage system charge / discharge rate is 0.5P, the maximum ambient temperature is 55℃, the altitude is 3000m, and the peak current of the energy storage system is Irms = 314 * 0.5 / (3.2 / 2.5) = 201A. Therefore, the temperature derating factor is 0.95, and the altitude derating factor is 0.98. Considering that the circuit breaker's cyclic overload factor G ≥ 1.1, the rated current of the circuit breaker can be determined as In = Irms / Kt / / Ka * G = 201 / 0.95 / 0.98 * 1.1 = 237A. To ensure a certain margin, it is recommended that the rated current of the circuit breaker be 250A, that is, the recommended rated current of the circuit breaker is 250A or higher.

[0152] In some embodiments, the design method of the high-voltage box further includes: determining the arc-front integral of the first fuse in the battery pack corresponding to the high-voltage box based on the attribute information of the energy storage system; and determining the second arc-front integral of the second fuse in the high-voltage box based on the first arc-front integral of the first fuse in the battery pack corresponding to the high-voltage box.

[0153] In this application, the second fuse in the high-voltage box and the first fuse in the battery pack need to implement a hierarchical matching strategy. That is, when a short-circuit current fault occurs, the second fuse in the high-voltage box blows first, while the first fuse in the battery pack does not blow. This effectively reduces after-sales maintenance work and saves manpower, material resources, and financial resources. Simultaneously, from the perspective of the fuse's pre-arc energy, it can be quantified, and the first pre-arc integral (If) of the first fuse in the battery pack... 2 The value of t) can be greater than or equal to a preset multiple (such as 1.5 times) the second arc-before integral (I) of the second fuse in the high-voltage box. 2 The value of t) is determined so that the second fuse in the high-voltage box can be blown first, while the first fuse in the battery pack does not blow, thus achieving the purpose of the graded matching strategy.

[0154] In some embodiments, determining the device selection method according to the category includes: if the device category is a second fuse, using the rated current, breaking current, breaking ratio, and second pre-arc integral of the second fuse as the selection method for the second fuse; selecting the device according to the rated current of the device to determine the parameter information of the device includes: selecting the fuse according to the rated current, breaking current, and breaking ratio of the second fuse to determine the parameter information of the fuse.

[0155] In this application, when it is determined that a second fuse needs to be selected for the high-voltage box, the second fuse can be pre-determined based on its second arc-precession integral. Then, the rated current, breaking current, and breaking capacity of the second fuse are used as the selection criteria, thereby determining the fuse's parameter information. The breaking current of the fuse can include both the minimum and maximum breaking current, and the breaking capacity can include both the minimum and maximum breaking capacity.

[0156] In some embodiments, the design method of the high-voltage box further includes: determining the first short-circuit current of the energy storage system and the second short-circuit current at the battery cluster where the high-voltage box is located based on the attribute information of the energy storage system; determining the breaking current of the second fuse based on the first short-circuit current; and determining the breaking ratio of the second fuse based on the rated current of the second fuse and the second short-circuit current.

[0157] Specifically, in determining the breaking current and breaking capacity of the second fuse, this application can determine the minimum breaking current and minimum breaking capacity of the second fuse based on the attribute information of the energy storage system. Specifically, the first short-circuit current of the energy storage system and the second short-circuit current at the battery cluster where the high-voltage box is located can be determined based on the attribute information of the energy storage system. Then, the breaking current of the second fuse is determined based on the first short-circuit current, and the breaking capacity of the second fuse is determined based on the rated current of the second fuse and the second short-circuit current.

[0158] In this application, the first short-circuit current can be understood as the maximum short-circuit current of the energy storage system, and the second short-circuit current can be the minimum short-circuit current of the battery cluster where the high-voltage box is located. The attribute information may include the cell capacity, the rated voltage of the cell, the AC internal resistance of the cell, the charge and discharge rate, the composition of the battery pack, the composition of the battery cluster, the number of battery clusters, and the internal resistance coefficient of the energy storage system.

[0159] For example, the cell capacity is 314Ah, the cell rated voltage V0 is 3.2V, the cell AC internal resistance R0 is 0.2mΩ, the energy storage system charge / discharge rate is 1P, the battery pack configuration is 1P52S, the battery cluster configuration is 1P416S, the number of battery clusters n is 10, and the energy storage system internal resistance coefficient k = 1.4. In this case, the maximum short-circuit current I1 of the battery cluster containing the high-voltage box is I1 = (V0*52)V / (R*52*K+1)mΩ = (3 0.2*52)V / (0.2*52*1.4+1)mΩ=10.69kA, where 1mΩ is the external short-circuit resistance. Considering redundancy, it is recommended that the maximum short-circuit current I1 of the battery cluster where the high-voltage box is located be 13kA. The minimum breaking current Ia of the first fuse in the battery pack is greater than I1. It is recommended that the minimum breaking current Ia of the first fuse in the battery pack be 30kA or 50kA.

[0160] Meanwhile, the maximum short-circuit current of the energy storage system is I2 = (n-1)*I1 = (10-1)*13 = 117kA. Considering two energy storage systems connected in parallel, the maximum short-circuit current of the energy storage system is I2 = (n-1)*I1 = (20-1)*13 = 247kA. Therefore, it is recommended that the maximum short-circuit current of the energy storage system be 120kA, 150kA or 250kA. That is, the minimum breaking current of the second fuse in the high-voltage box is recommended to be 120kA, 150kA or 250kA.

[0161] Additionally, the minimum short-circuit current at the cluster level is I3 = (V0*52)V / (R0*52*K+30)mΩ = (3.2*52)V / (0.2*52*1.4+30)mΩ = 3.73kA, where 30mΩ is the external short-circuit resistance. The rated current In of the first fuse in the battery pack is 630A, so m ≤ I3 / In = 3.73*1000 / 630A = 5.93 times. If m is taken as 5 times, the minimum breaking capacity of the first fuse in the battery pack is recommended to be 5In. Meanwhile, the second fuse In in the high-voltage box is 550A, so m ≤ I3 / In = 3.73*1000 / 550A = 6.78 times. It is recommended that m be taken as 6 times, that is, the minimum breaking capacity of the second fuse in the high-voltage box is recommended to be 6In.

[0162] In some embodiments, determining the device selection method according to the category includes: if the device category is a circuit breaker, using the rated current and withstand information of the circuit breaker as the selection method for the circuit breaker; selecting the device according to the rated current of the device to determine the parameter information of the device includes: selecting the circuit breaker according to the rated current and withstand information of the circuit breaker to determine the parameter information of the circuit breaker.

[0163] In this application, when it is determined that a circuit breaker needs to be selected in a high-voltage box, the rated current and withstand information of the circuit breaker can be used as the selection criteria for the fuse, thereby determining the parameter information of the circuit breaker. The withstand information of the circuit breaker may include the withstand time.

[0164] In some embodiments, the design method of the high-voltage box further includes: determining the current overload time of the energy storage system under preset operating conditions and the tripping time of the circuit breaker based on the attribute information of the energy storage system; and determining the withstand information of the circuit breaker based on the overload time and the tripping time.

[0165] Specifically, in determining the withstand information of the circuit breaker, this application can determine the current overload time of the energy storage system under preset operating conditions and the tripping time of the circuit breaker based on the attribute information of the energy storage system. Then, the withstand information of the circuit breaker can be determined based on the overload time and tripping time.

[0166] For example, the overload current check of the circuit breaker needs to satisfy T2 > T1, where T1 is the overload time of the operating current of the energy storage system (T1 = 10min, 2min, 1min, 10s, and the specific value of T1 can be corresponding to the overload coefficient K1 value according to the overload test requirements of the energy storage system), and T2 is the tripping time of the circuit breaker. Specifically, when the peak current I1 is 201A, the rated current of the circuit breaker I2 is 250A, the overload factors K1 are 1.1, 1.2, 1.5, and 3 times respectively, and the overload time T1 of the operating current is 10min, 2min, 1min, and 10s respectively (the overload time T1 of the operating current corresponds to K1 in sequence). Then, the overload factor K2 of the rated current of the circuit breaker is K1*I1 / I2 = 1.1*201 / 250 = {0.8844 times, 1.2*201 / 250 = 0.96488 times, 1.5*201 / 250 = 1.206 times, 3*201 / 250 = 2.412 times}. After that, K2 takes values ​​of 0.8844 times, 0.96488 times, 1.206 times, and 2.412 times respectively, and is considered... Figure 12 By looking up the table, we can obtain the value of T2. Finally, according to the table, we can find that T2 is greater than 10000s or equal to 10000s or between 1000s and 10000s or between 60s and 250s. We can determine that when K1 takes different values, T2 is always greater than T1, so the judgment is qualified.

[0167] In some embodiments, the design method of the high-voltage box further includes: determining the current overload coefficient of the energy storage system under a preset operating condition based on the overload time; determining the overload coefficient of the rated current of the circuit breaker based on the peak current of the energy storage system and the rated current of the circuit breaker; and determining the tripping time of the circuit breaker from a preset circuit breaker tripping curve based on the overload coefficient of the rated current of the circuit breaker.

[0168] In some embodiments, determining the device selection method according to the category includes: if the device category is a connector, using the connector's endurance time as the connector selection method; selecting the device according to the selection method to determine the device's parameter information includes: selecting the connector according to the connector's endurance time to determine the connector's parameter information.

[0169] In this application, when it is determined that a connector needs to be selected in the high-voltage box, the withstand time of the connector can be used as the selection criterion, thereby determining the parameter information of the connector.

[0170] In some embodiments, the design method of the high-voltage box further includes: determining the arc pre-arc time of the second fuse in the high-voltage box based on the attribute information of the energy storage system; and determining the withstand time of the connector based on the arc pre-arc time of the second fuse in the high-voltage box.

[0171] Specifically, connectors are electrical connections, which experience high temperature rise when current flows through them. When a short circuit occurs, the temperature increases dramatically. Coupled with the connector's high IP protection rating, the expansion of high-temperature gases can cause the high-voltage connector connection to spring open, or even explode and arc. When a short circuit occurs, the connector is required to withstand it safely for a period of time, during which a second fuse provides protection. The second fuse is of type A protection. It melts quickly for large short circuit currents, but the melting time is longer and more unstable for small short circuit currents, which has high limitations.

[0172] For example, taking the minimum short-circuit current at the cluster level as an example, if the minimum short-circuit current at the cluster level I3 = 3.73kA, then... Figure 13 As shown in the diagram, the arc pre-arc time of the second fuse is 15s. Therefore, the recommended withstand time for the connector under a short-circuit current of 3.73kA is greater than 20s.

[0173] In some embodiments, the design information includes functional information; determining the category of each component inside the high-voltage box based on the design information includes: determining the category of each component inside the high-voltage box based on the functional information.

[0174] Specifically, in determining the categories of each component inside the high-voltage box, this application can determine the categories of each component based on functional information. This functional information includes functions such as cluster-level system power transmission, cluster-level current acquisition, cluster-level short-circuit protection, cluster-level disconnection, cluster-level closing and opening, maintenance functions, pre-charging, and equalization.

[0175] After obtaining the design information, this application can obtain the functional information of each device in the high-voltage box. For example, for power transmission in the cluster system, the device category can be determined as a high-voltage connector; for collecting cluster current, the device category can be determined as a shunt or Hall effect sensor; for cluster short-circuit protection, the device category can be determined as a main fuse; for cluster disconnection to realize power-on and power-off functions, the device category can be determined as a main relay; for cluster closing, opening, and maintenance, the device category can be determined as a circuit breaker or disconnector; for pre-charging and equalization to solve the circulating current problem caused by excessive inter-cluster voltage difference, the device category can be determined as a pre-charging relay and a pre-charging resistor.

[0176] In some embodiments, the design information also includes dimensional information; after determining the categories of each component inside the high-voltage box, it further includes: determining the connection method of the components inside the high-voltage box based on the dimensional information and the categories.

[0177] Specifically, after determining the categories of each component inside the high-voltage box, this application can also determine the connection method of the components inside the high-voltage box based on the size information and component categories in the design information. This ensures that each component inside the high-voltage box can be installed in the corresponding position to achieve the purpose of stable and safe operation of the energy storage system.

[0178] For example, the high-voltage connector can be located at interface B+ and interface B- to connect the high-voltage box and the battery pack; at the same time, the high-voltage connector can also be located at interface P+ and interface P- to connect the high-voltage box and the combiner cabinet or energy storage converter.

[0179] Shunt units or Hall effect sensors are typically placed on the negative terminal. The negative terminal has a lower potential, requiring less isolation, resulting in simpler circuit design, potentially lower cost, and reduced risk of electric shock or short circuits. Both the positive and negative circuits require a fuse to prevent blind spots and ensure the safety of the energy storage system under various fault scenarios. Short-circuit currents can be promptly cut off, providing full-path protection. Simultaneously, both the positive and negative circuits require a relay to prevent potential current paths (such as leakage current) from forming through grounding, parasitic capacitance, or insulation failure on the unconnected terminal, which could lead to incomplete isolation of the high-voltage circuit. Therefore, it is necessary to ensure complete disconnection of the high-voltage circuit. Furthermore, when the energy storage system is powered on, the positive and negative relays, in conjunction with the pre-charging resistor, limit the capacitor charging current to prevent surge impacts.

[0180] Circuit breakers or disconnect switches are usually installed on the DC output side for three reasons: first, the output side is closer to the load and can effectively protect downstream equipment, and the load conditions are more complex and require priority protection; second, the input side battery pack is usually equipped with fuses for protection, avoiding redundant protection; and third, the internal space of the high-voltage box is limited, so the input side is usually arranged with compact devices such as fuses and relays, while the output side is more suitable for installing larger circuit breakers or disconnect switches.

[0181] The pre-charge relay and pre-charge resistor are usually installed and connected on both sides of the positive relay. If the pre-charge circuit is connected to the negative side, the current limiting may fail due to the grounding path (the current bypasses the resistor and flows directly into the ground circuit). In addition, the pre-charge circuit is linked with the main positive relay, and only the positive path needs to be controlled to switch between the pre-charge circuit and the main circuit, avoiding complex timing control on the negative side.

[0182] In the high-voltage box design method provided in this application embodiment, the design information of the high-voltage box is obtained, and the categories of each component inside the high-voltage box are determined based on the design information. Then, the selection method of the components is determined based on the categories, and finally, the components are selected according to the selection method to determine the parameter information of the components. This ensures that the designed high-voltage box, when applied to an energy storage system, meets the requirements of the energy storage system in terms of various protection indicators, guaranteeing the safe operation of the energy storage system. Simultaneously, by calculating the rated current of fuses and circuit breakers, this application can realize the power transmission function of the high-voltage box, meeting the system's current carrying capacity and temperature rise requirements. Furthermore, the breaking capacity of the fuses, graded matching, the withstand requirements of the high-voltage connectors, and the overload requirements of the circuit breakers can realize the short-circuit protection function of the high-voltage box, meeting the system's current carrying capacity and temperature rise requirements.

[0183] This application also provides a high-voltage box design apparatus 200, which is used to perform any of the aforementioned high-voltage box design methods.

[0184] Specifically, please refer to Figure 14 , Figure 14 This is a schematic block diagram of the high-voltage box design device 200 provided in the embodiments of this application.

[0185] like Figure 14 As shown, the high-voltage box design device 200 provided in this application includes: an acquisition unit 210, a first determination unit 220, a second determination unit 230 and a third determination unit 240.

[0186] The acquisition unit 210 is used to acquire the design information of the high-voltage box; the first determination unit 220 is used to determine the category of each component inside the high-voltage box according to the design information; the second determination unit 230 is used to determine the selection method of the component according to the category; and the third determination unit 240 is used to select the component according to the selection method to determine the parameter information of the component.

[0187] The high-voltage box design device 200 provided in this application embodiment can obtain the design information of the high-voltage box, determine the category of each component inside the high-voltage box based on the design information, determine the selection method of the component based on the category, and finally select the component based on the selection method to determine the parameter information of the component. In this way, the designed high-voltage box can meet the requirements of the energy storage system after being applied to the energy storage system, ensuring that the energy storage system can operate safely.

[0188] It should be noted that those skilled in the art can clearly understand that the specific implementation process of the above-mentioned high-voltage box design device 200 and each unit can be referred to the corresponding description in the foregoing method embodiments. For the sake of convenience and brevity, it will not be repeated here.

[0189] The aforementioned high-voltage box design device 200 can be implemented as a computer program, which can be used in, for example... Figure 15 It runs on the electronic device shown.

[0190] Please see Figure 15 , Figure 15 This is a schematic block diagram of the electronic device 300 provided in the embodiments of this application.

[0191] See Figure 15 The electronic device 300 includes a processor 302, a memory, and a network interface 305 connected via a system bus 301. The memory may include a storage medium 303 and internal memory 304.

[0192] The storage medium 303 can store an operating system 3031 and a computer program 3032. When the computer program 3032 is executed, it causes the processor 302 to execute the design method of the high-voltage box.

[0193] The processor 302 provides computing and control capabilities to support the operation of the entire device 300.

[0194] The internal memory 304 provides an environment for the execution of the computer program 3032 in the non-volatile storage medium 303. When the computer program 3032 is executed by the processor 302, the processor 302 can execute the design method of the high-voltage box.

[0195] The network interface 305 is used for network communication, such as providing data transmission. Those skilled in the art will understand that... Figure 15 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the device 300 to which the present application is applied. The specific device 300 may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0196] The processor 302 is used to run the computer program 3032 stored in the memory to perform the following functions: obtain the design information of the high-voltage box; determine the category of each component inside the high-voltage box according to the design information; determine the selection method of the component according to the category; and select the component according to the selection method to determine the parameter information of the component.

[0197] Those skilled in the art will understand that Figure 15The embodiments of device 300 shown do not constitute a limitation on the specific configuration of device 300. In other embodiments, device 300 may include more or fewer components than shown, or combine certain components, or have different component arrangements. For example, in some embodiments, device 300 may include only a memory and processor 302. In such embodiments, the structure and function of the memory and processor 302 are similar to those shown. Figure 15 The embodiments shown are consistent and will not be described again here.

[0198] It should be understood that in the embodiments of this application, processor 302 may be a central processing unit (CPU), and processor 402 may also be other general-purpose processor 302, digital signal processor 302 (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor 302 may be a microprocessor 302, or it may be any conventional processor 302, etc.

[0199] According to one aspect of this application, a computer program product or computer program is also provided, comprising computer instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform the following steps: obtaining design information of a high-voltage box; determining the categories of various components inside the high-voltage box based on the design information; determining the selection method for the components based on the categories; and selecting components based on the selection method to determine the parameter information of the components.

[0200] It will be understood by those skilled in the art that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program includes program instructions and can be stored in a storage medium, which is a computer-readable storage medium. The program instructions are executed by at least one processor in the computer system to implement the process steps of the embodiments of the above methods.

[0201] In another embodiment of this application, a computer storage medium is provided. This storage medium can be a non-volatile computer-readable storage medium or a volatile storage medium. The storage medium stores a computer program 3032, which, when executed by a processor 302, performs the following steps: obtaining design information of the high-voltage box; determining the categories of each component inside the high-voltage box based on the design information; determining the selection method for the components based on the categories; and selecting components based on the selection method to determine the parameter information of the components.

[0202] The storage medium can be any computer-readable storage medium that can store program code, such as a USB flash drive, external hard drive, read-only memory (ROM), magnetic disk, or optical disk.

[0203] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.

[0204] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For example, the division of each unit is merely a logical functional division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0205] The steps in the methods of this application embodiment can be adjusted, merged, or deleted according to actual needs. The units in the apparatus of this application embodiment can be merged, divided, or deleted according to actual needs. Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0206] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause an electronic device (which may be a personal computer, a terminal, or a network device, etc.) to execute all or part of the steps of the methods provided in the various embodiments of this application.

[0207] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A design method for a high-pressure box, characterized in that, The high-voltage box utilizes an energy storage system, and the method includes: Obtain the design information of the high-voltage box; Based on the design information, determine the categories of each component inside the high-voltage box; Based on the category, determine the selection method for the device; According to the selection method, the device is selected to determine the parameter information of the device.

2. The design method of the high-voltage box according to claim 1, characterized in that, The step of selecting the device according to the selection method to determine the device's parameter information includes: Based on the design information, determine the attribute information of the energy storage system; Based on the attribute information of the energy storage system, the device is selected using the selection method to determine the parameter information of the device.

3. The design method of the high-voltage box according to claim 2, characterized in that, The selection method includes the rated current of the device; The selection of devices based on the attribute information of the energy storage system, using the selection method to determine the parameter information of the devices, includes: Based on the attribute information of the energy storage system, determine the rated current of the device; The device is selected based on its rated current to determine its parameter information.

4. The design method of the high-voltage box according to claim 3, characterized in that, Determining the rated current of the device based on the attribute information of the energy storage system includes: Based on the attribute information of the energy storage system, the peak current of the energy storage system and the derating factor of the device are determined; the derating factor of the device includes at least one of temperature derating factor, cable derating factor at both ends of the device, and altitude derating factor. The rated current of the device is determined based on the peak current of the energy storage system and the derating factor of the device.

5. The design method of the high-voltage box according to claim 3, characterized in that, The method further includes: Based on the attribute information of the energy storage system, determine the first arc-front integral of the first fuse in the battery pack corresponding to the high-voltage box; The second arc-precursor integral of the second fuse in the high-voltage box is determined based on the first arc-precursor integral.

6. The design method of the high-voltage box according to claim 5, characterized in that, The step of determining the selection method for the device based on the category includes: If the device is classified as the second fuse, the rated current, breaking current, breaking ratio, and second pre-arc integral of the second fuse shall be used as the selection method for the second fuse. The step of selecting the device based on its rated current to determine the device's parameter information includes: The second fuse is selected based on its rated current, breaking current, and breaking ratio to determine its parameter information.

7. The design method of the high-voltage box according to claim 6, characterized in that, The method further includes: Based on the attribute information of the energy storage system, determine the first short-circuit current of the energy storage system and the second short-circuit current at the battery cluster where the high-voltage box is located; The breaking current of the second fuse is determined based on the first short-circuit current, and the breaking ratio of the fuse is determined based on the rated current of the second fuse and the second short-circuit current.

8. The design method of the high-voltage box according to claim 3, characterized in that, The step of determining the selection method for the device based on the category includes: If the device is classified as a circuit breaker, the rated current and withstand information of the circuit breaker shall be used as the selection method for the circuit breaker. The step of selecting the device based on its rated current to determine the device's parameter information includes: The circuit breaker is selected based on its rated current and withstand information to determine its parameter information.

9. The design method of the high-voltage box according to claim 8, characterized in that, The method further includes: Based on the attribute information of the energy storage system, determine the current overload time of the energy storage system under preset operating conditions and the tripping time of the circuit breaker. The withstand information of the circuit breaker is determined based on the overload time and the tripping time.

10. The design method of the high-voltage box according to claim 9, characterized in that, The method further includes: The current overload coefficient of the energy storage system under the preset operating conditions is determined based on the overload time. Based on the peak current of the energy storage system and the rated current of the circuit breaker, determine the overload factor of the rated current of the circuit breaker; Based on the overload coefficient of the rated current of the circuit breaker, the tripping time of the circuit breaker is determined from the preset circuit breaker tripping curve.

11. The design method of the high-voltage box according to claim 3, characterized in that, The step of determining the selection method for the device based on the category includes: If the device is classified as a connector, the connector's endurance time will be used as the selection criterion for the connector. The step of selecting the device according to the selection method to determine the device's parameter information includes: The connector is selected based on its withstand time to determine the connector's parameter information.

12. The design method of the high-voltage box according to claim 11, characterized in that, The method further includes: Based on the attribute information of the energy storage system, determine the arc pre-arc time of the second fuse in the high-voltage box; The withstand time of the connector is determined based on the pre-arc time of the second fuse.

13. The design method of the high-voltage box according to any one of claims 1-12, characterized in that, The design information includes functional information; The step of determining the category of each component inside the high-voltage box based on the design information includes: Based on the functional information, the categories of each component inside the high-voltage box are determined.

14. The design method of the high-voltage box according to any one of claims 1-12, characterized in that, The design information also includes dimensional information; After determining the categories of each component inside the high-voltage box, the following steps are also included: Based on the size information and the category, determine the connection method of the device within the high-voltage box.

15. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the high-voltage box design method according to any one of claims 1 to 14.

16. A high-pressure box, characterized in that, The high-pressure box was designed using the design method of any one of claims 1 to 14.

17. An energy storage system, characterized in that, Includes the high-pressure box as described in claim 16.

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