Inter-cluster active balancing device based on bidirectional high-voltage DCDC coupling high-voltage box

Abstract

This invention relates to the field of energy storage system technology and discloses an inter-cluster active balancing device based on a bidirectional high-voltage DC-DC coupled high-voltage box, comprising: a bidirectional high-voltage DC-DC converter module, a high-voltage box integration module, a battery cluster connection module, a coordination controller module, and a high-voltage DC bus coupling module. Compared with the existing technology where the high-voltage box and bidirectional DC-DC module are deployed separately, resulting in a dispersed structure and poor scalability, especially under the conditions of long-term operation and bidirectional energy flow control in multi-cluster energy storage systems, which makes it impossible to achieve high-efficiency intelligent inter-cluster balancing scheduling, this application achieves modular bidirectional adaptive energy migration between clusters by deeply integrating the bidirectional DC-DC converter with the high-voltage box structure. This avoids the problems of complex wiring, slow balancing, and dispersed protection systems in existing systems, and improves system integration, voltage balance efficiency, and long-term operational safety.

Description

Technical Field

[0001] This invention relates to the field of energy storage system technology, and in particular to an inter-cluster active balancing device based on a bidirectional high-voltage DC-DC coupled high-voltage box. Background Technology

[0002] Currently, in applications such as photovoltaic-storage microgrids, industrial-grade long-duration energy storage, and grid-side peak shaving, energy storage systems are gradually evolving towards higher voltage, larger capacity, and modularity. The typical operating voltage of these systems has increased from 750V to 1050V or even 1500V. To meet the energy coordination needs between different energy storage clusters, bidirectional DC-DC converters and high-voltage distribution boxes (i.e., high-voltage boxes) are typically introduced into high-voltage DC systems for coordinated operation. However, in existing technical architectures, bidirectional DC-DC modules and high-voltage boxes are mostly designed as separate units, resulting in shortcomings such as dispersed structure, complex deployment, signal separation, and fragmented control.

[0003] For example, most existing high-voltage DC-DC modules adopt a unidirectional boost or buck topology, lacking the ability to adapt to bidirectional energy flow between clusters. This results in the system only being able to achieve unidirectional charge-discharge switching, unable to flexibly adjust the power direction according to the battery cluster status. The high-voltage box exists only as a traditional protection unit for fuse breaking, isolation, and pre-charging, lacking a deeply coupled structure and control interface with the DC-DC converter, and cannot support the implementation of active energy balancing scheduling strategies between clusters. At the same time, due to differences in operating environment, degradation rate, load sharing, and other factors during battery cluster operation, the SOC level often deviates significantly. However, current mainstream systems still rely on cell-level or module-level balancing mechanisms, unable to redistribute energy at the cluster level, resulting in problems such as decreased overall pack capacity utilization, asynchronous aging, and poor maintainability.

[0004] Furthermore, the internal structure of existing high-voltage boxes is not optimized for DC-DC controllers, lacking a shared channel for real-time data on bus voltage, current, temperature rise, and failure modes, making it difficult to achieve module-level operational diagnostics and closed-loop protection. Under high-power operating conditions, the long high-voltage wiring paths, separate heat dissipation systems, and numerous wiring nodes further lead to low system integration, poor thermal management efficiency, and complex expansion or replacement processes, resulting in high engineering risks and maintenance costs.

[0005] Therefore, there is an urgent need for an energy storage system solution with bidirectional energy conversion capability and compact integrated structure under high-voltage conditions. With the bidirectional DC-DC module and the high-voltage box integrated in the same shell, intelligent energy balance migration and dynamic scheduling between battery clusters can be achieved to improve the system integration, operating efficiency and long-term capacity retention capability. Summary of the Invention

[0006] To address the aforementioned technical shortcomings, the purpose of this invention is to propose an inter-cluster active balancing device based on a bidirectional high-voltage DC-DC coupled high-voltage box. This device aims to solve the technical problems of existing technologies, such as the separate deployment of the high-voltage box and DC-DC module, dispersed structure, and poor scalability, especially the inability to achieve high-efficiency intelligent balancing scheduling between clusters under long-term operation and bidirectional energy flow control conditions in multi-cluster energy storage systems.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides an inter-cluster active equalization device based on a bidirectional high-voltage DC-DC coupled high-voltage box. Inter-cluster active equalization devices based on high-voltage DC-DC coupled high-voltage boxes include: The high-voltage DC bus coupling module is used to connect the high-voltage side output terminal of the bidirectional high-voltage DC-DC converter module in parallel with the corresponding high-voltage box integrated module to build a shared high-voltage DC energy coupling channel between clusters and realize bidirectional energy transmission between multiple battery clusters. The coordination controller module establishes a bidirectional communication connection with the bidirectional high-voltage DC-DC converter module through a communication link. It is used to periodically collect the state parameters of the first battery cluster and the second battery cluster, and execute a dynamic optimization scheduling algorithm based on the state parameters to generate the target energy migration path and the corresponding power control command. The high-voltage box integrated module is integrated with the bidirectional high-voltage DC-DC converter module in the same shell. It is equipped with fuses, disconnect switches, pre-charge circuits and anti-arc unit, and forms a high-voltage power exchange channel with the high-voltage side bus of the first battery cluster and the second battery cluster. The bidirectional high-voltage DC-DC converter module has its power input terminal electrically connected to the first battery cluster, while its power output terminal is connected to the combiner cabinet on the PCS side via a power bus. It is used to achieve bidirectional energy conversion between 1050V and 1500V to support directional energy transfer between clusters. The battery cluster connection module connects the positive and negative terminals of the first battery cluster and the second battery cluster respectively, and forms a closed and controllable energy flow path with the first battery cluster, the second battery cluster and the bidirectional high voltage DC-DC converter module. Preferably, the high-voltage DC bus coupling module further includes: the high-voltage DC bus coupling module includes an insulating support structure, and current detection nodes and thermal monitoring nodes.

[0008] Preferably, in the coordination controller module, the state parameters include voltage parameters, current parameters, SOC parameters, and temperature parameters; the dynamic optimization algorithm includes an optimization algorithm based on minimizing the objective function using a weighted directed graph.

[0009] Preferably, in the bidirectional high-voltage DC-DC converter module, the bidirectional high-voltage DC-DC converter module includes a non-isolated three-level half-bridge topology circuit for performing bidirectional voltage conversion between 1050V and 1500V.

[0010] Preferably, in the high-voltage integrated module, the bidirectional high-voltage DC-DC converter module and the high-voltage box integrated module are physically deployed in a shared shell. Structurally, they share the shell, heat dissipation channels and busbar channels, and electrically, they share the control signal channel and protective grounding path, which is used to achieve dual optimization of structural integration and functional integration.

[0011] Preferably, the bidirectional high-voltage DC-DC converter module further includes an energy scheduling execution unit, a PWM control unit, and a drive circuit unit; wherein, the energy scheduling execution unit is deployed inside the bidirectional high-voltage DC-DC converter module and has a bidirectional communication connection with the coordination controller module, and is directly connected to the PWM control unit and drive circuit unit of the bidirectional high-voltage DC-DC converter module, and is used to control the bidirectional high-voltage DC-DC converter module to output or absorb current of a specified direction and amplitude according to the received scheduling power command, so as to realize the target energy scheduling between battery clusters.

[0012] Preferably, the high-voltage box integrated module further includes a safety protection unit, which is connected to the internal circuit of the high-voltage box integrated module and is used to monitor abnormal states such as overvoltage, overcurrent, short circuit and overtemperature during the energy dispatching process; and sends the monitoring signals to the coordination controller module and the bidirectional high-voltage DC-DC converter module.

[0013] The beneficial effects of this invention are as follows: This invention realizes the integrated co-shell integration of the bidirectional high-voltage DC-DC converter module and the high-voltage box, which significantly simplifies the system wiring structure and improves the integration of the whole machine, the flexibility of modular deployment and the maintainability of the system while ensuring the safety of bus protection, heat dissipation channel and high voltage insulation.

[0014] This invention introduces a dynamic energy scheduling mechanism based on the differences in battery cluster states. By coordinating the controller to collect inter-cluster SOC and voltage state parameters in real time, and combining the optimization algorithm to control the bidirectional DC-DC power output, it can achieve bidirectional balanced flow of high-voltage energy between clusters, thereby improving the capacity utilization and operational stability of the entire energy storage system. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a flowchart illustrating the first embodiment of an inter-cluster active equalization device based on a bidirectional high-voltage DC-DC coupled high-voltage box according to the present invention.

[0017] Figure 2 This is a schematic diagram of a three-level half-bridge topology circuit of a first embodiment of an inter-cluster active equalization device based on a bidirectional high-voltage DC-DC coupled high-voltage box according to the present invention.

[0018] Figure 3 This invention provides a schematic diagram of the electrical connection topology between the bidirectional high-voltage DC-DC converter module and the high-voltage box in a first embodiment of an inter-cluster active equalization device based on a bidirectional high-voltage DC-DC coupled high-voltage box. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: As Figure 1 The diagram shown is a flowchart of the first embodiment of the active inter-cluster balancing device based on a bidirectional high-voltage DC-DC coupled high-voltage box according to the present invention. The first embodiment of the active inter-cluster balancing device based on a high-voltage DC-DC coupled high-voltage box according to the present invention is presented.

[0021] In the first embodiment, the inter-cluster active equalization device based on a high-voltage DC-DC coupled high-voltage box includes: The bidirectional high-voltage DC-DC converter module has its power input terminal electrically connected to the first battery cluster (1500V), while its power output terminal is connected to the busbar on the PCS side (1050V) through the power bus. This module is used to achieve bidirectional energy conversion between 1050V and 1500V to support directional energy transfer between clusters. It should be noted that, as Figure 2 As shown, the bidirectional high-voltage DC-DC converter module adopts a non-isolated three-level half-bridge topology, combined with automotive-grade SiC MOSFETs and a multi-phase interleaved parallel design, which can achieve high-efficiency, low-loss energy conversion under high voltage and high current conditions, and supports flexible power regulation capability in continuous current operation mode.

[0022] Understandably, this DC-DC module not only has conventional boost and buck functions, but also achieves real-time reversal of current direction through software-defined control strategies. It can dynamically determine the current module's "power supply" or "power receiving" role based on the SOC difference between battery clusters, thereby realizing autonomous energy redistribution between battery clusters.

[0023] It should be understood that, compared with the traditional unidirectional DC-DC structure, the bidirectional conversion module in this embodiment can avoid the problem of premature system protection tripping caused by uneven SOC.

[0024] For example, in a certain energy storage subsystem, the SOC of the first battery cluster is 92% and the SOC of the second battery cluster is 84%. After detecting that the difference between the two exceeds the system's set equalization threshold (such as 5%), the coordinating controller sends a target power command to the DC-DC module, for example, setting the output voltage to 1050V and the output current to 50A. The DC-DC module then enters the power supply mode and continuously outputs energy to the second battery cluster with the lower SOC according to the command until the SOC difference falls back to the threshold range, thereby completing a closed-loop inter-cluster equalization task.

[0025] The high-voltage box integrated module is integrated with the bidirectional high-voltage DC-DC converter module in the same shell. It is equipped with fuses, disconnect switches, pre-charge circuits and anti-arc unit, and forms a high-voltage power exchange channel with the high-voltage side bus of the first battery cluster and the second battery cluster. It should be noted that, as Figure 3 As shown, the high-voltage box integrated module forms an integrated electrical component with the bidirectional high-voltage DC-DC converter module through a shared shell structure. Its internal bus wiring and DC-DC power channels in the shell are arranged in a layered manner, which ensures the safety of the high-voltage isolation path and significantly reduces the energy loss and wiring complexity caused by cable redundancy in the traditional split structure.

[0026] Understandably, this high-voltage box not only has traditional high-voltage power distribution functions, but also achieves composite control functions of high-voltage side protection, energy flow switching and module linkage by sharing a housing and control interface with the DC-DC module, effectively improving the fault response speed and system safety and stability of the entire energy storage cluster.

[0027] It should be understood that, compared to the existing technology of installing the high-voltage box and the DC-DC module in separate cabinets and connecting them by cables, the integrated structure adopted in this invention not only reduces the number of electrical connection points and contact resistance, but also avoids creepage, heat dissipation and vibration problems caused by external busbar connections. It is particularly suitable for industrial or new energy field environments with high vibration, high temperature difference and limited space.

[0028] The battery cluster connection module connects the positive and negative terminals of the first battery cluster and the second battery cluster respectively, and forms a closed and controllable energy flow path with the first battery cluster, the second battery cluster and the bidirectional high voltage DC-DC converter module. It should be noted that the battery cluster connection module includes a high-voltage connector, busbar, insulating support components, and a current sampling device. It features high-voltage safety isolation, thermal management interface, and online detection functions. Its connection structure supports point-to-point, relay-free direct connection, ensuring low impedance and high reliability of the energy flow path.

[0029] Understandably, while constructing a closed energy path, this module also allows the system to dynamically configure the energy flow direction. When the first battery cluster is in a high SOC state and the second battery cluster is in a low SOC state, directional energy migration can be achieved through this connection path under the action of the bidirectional DC-DC module, completing the inter-cluster equalization process. Moreover, this path has electrical isolation and independent disconnection protection capabilities.

[0030] It should be understood that, compared with the traditional method of using multiple busbars and adapter terminals, the battery cluster connection module of the present invention reduces the number of intermediate connection points and contacts, thereby reducing the risk of thermal runaway caused by contact resistance, vibration loosening or aging, and is particularly suitable for energy storage systems that operate for a long time under high current and high frequency.

[0031] For example, in actual deployment, the positive and negative terminals of the first battery cluster are connected to the input of the DC-DC module through a customized L-shaped copper busbar, while the second battery cluster is connected to the output of the DC-DC module through an independent insulating support structure. The connection module integrates a Hall current sensor and a thermocouple probe, which can monitor the operating current and temperature rise of each energy path in real time. When the temperature at the connection point exceeds a preset threshold (such as 85°C) or an abnormal current change is detected, the upper-level coordinating controller will be triggered to perform connection path disconnection or power limiting operations, thereby ensuring the safe operation of the system.

[0032] The coordination controller module establishes a bidirectional communication connection with the bidirectional high-voltage DC-DC converter module through a communication link. It is used to periodically collect the state parameters of the first battery cluster and the second battery cluster, and execute a dynamic optimization scheduling algorithm based on the state parameters to generate the target energy migration path and the corresponding power control command. It should be noted that the coordination controller module can be deployed in the system-level main control unit (such as the EMS edge master station) or distributed within each energy storage module. It has the ability to collect, cache and dynamically calculate battery cluster status parameters (including voltage, current, SOC, temperature, etc.) in real time. It communicates bidirectionally with the DC-DC conversion module through CAN, RS485 or Ethernet communication protocols to realize the issuance of scheduling commands and the closed-loop update of feedback status.

[0033] It should be understood that, unlike traditional equalization mechanisms that are based solely on static rules or timed polling, the coordination controller in this invention introduces a dynamic model prediction and a multi-factor comprehensive judgment mechanism based on voltage, SOC, and temperature. This significantly improves the system's scheduling and adaptive capabilities under conditions of heterogeneous battery cluster states and power boundary fluctuations, and reduces the risk of redundant adjustment and misjudgment in energy migration.

[0034] For example, when the system detects that the SOC of the first battery cluster is 89%, the SOC of the second battery cluster is 78%, the voltage difference between the two exceeds 30V, and the temperature is within the allowable range, the coordinating controller will determine that the balancing conditions are met and calculate the target energy migration path as "from the first cluster to the second cluster" in the optimized scheduling model, with a corresponding power command of 3.5kW and a duration of 180 seconds. This command is then sent to the corresponding DC-DC module to control its output voltage and current, while monitoring the SOC difference curve during the execution process. If the termination conditions are met (such as SOC difference <2% or current <1A), the controller will automatically terminate the balancing process and update the cluster status record.

[0035] The high-voltage DC bus coupling module is used to connect the high-voltage side output terminals of multiple bidirectional high-voltage DC-DC converter modules in parallel with the corresponding high-voltage box integrated module to build a shared high-voltage DC energy coupling channel between clusters, thereby realizing bidirectional energy transmission between multiple battery clusters.

[0036] It should be noted that the high-voltage DC bus coupling module includes a bus copper bus assembly, an insulation support structure, a current / voltage detection node, a thermal coupling sensing unit, and an equipotential grounding path. It is used to construct a stable, low-impedance high-voltage DC energy channel between multiple energy storage modules and to meet the requirements of system-level parallel connection, decoupling, and monitoring. The bus coupling structure is usually set in the lower part of the module level or in the main trunk line, and a layered shielded wiring layout is adopted to reduce the risk of common-mode interference and thermal coupling.

[0037] Understandably, this module physically realizes the parallel connection of multiple bidirectional high-voltage DC-DC output sides, and logically forms a coupling platform for cross-cluster unified scheduling, enabling energy flow between any two battery clusters through the intermediate bus, thereby breaking through the path limitations of the traditional "point-to-point" balancing mode and supporting global arbitrary pair scheduling and multi-cluster chain energy reconfiguration.

[0038] It should be understood that, compared with the traditional distributed energy storage system which uses long-distance cables, distributed busbars and segmented isolation connections, the bus coupling module of this invention improves the energy flow efficiency of the system while taking into account electrical safety and thermal management stability. It avoids problems such as voltage drop, contact point heating and inconsistent grounding caused by excessive wiring, and is particularly suitable for energy storage cluster deployment environments with high voltage, high current and multiple clusters in parallel.

[0039] For example, in a system containing six energy storage clusters, each cluster is equipped with a DC-DC converter and a high-voltage box fusion module. Its high-voltage output is connected to the main DC bus via its respective copper busbar. When the coordinating controller detects that the State of Charge (SOC) of clusters 1, 4, and 5 is too high, while that of clusters 2 and 6 is too low, the controller issues three energy flow path commands through the bus coupling module: cluster 1 → cluster 2, cluster 4 → cluster 6, and cluster 5 → cluster 6. The high-voltage DC bus performs multi-point concurrent bidirectional energy dispatch while ensuring voltage equalization. During this process, the bus current sensor detects the actual energy transmission of each branch, and the protection mechanism works in conjunction with this to achieve system-level inter-cluster equalization.

[0040] Example 2: Furthermore, this invention also provides an inter-cluster active equalization system based on a bidirectional high-voltage DC-DC coupled high-voltage box. Employing an inter-cluster active equalization device based on a bidirectional high-voltage DC-DC coupled high-voltage box as described in the above embodiments, this system can solve the technical problem of inter-cluster active equalization based on a bidirectional high-voltage DC-DC coupled high-voltage box. Compared with the prior art, the beneficial effects of the inter-cluster active equalization system based on a bidirectional high-voltage DC-DC coupled high-voltage box provided by this invention are the same as those of the inter-cluster active equalization device based on a bidirectional high-voltage DC-DC coupled high-voltage box provided in the above embodiments. Moreover, other technical features of the inter-cluster active equalization system based on a bidirectional high-voltage DC-DC coupled high-voltage box are the same as those disclosed in the above embodiments, and will not be repeated here.

[0041] Example 3: This invention also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the above-described active inter-cluster equalization device based on a bidirectional high-voltage DC-DC coupled high-voltage box. The computer program product provided by this invention can solve the technical problem of active inter-cluster equalization based on a high-voltage DC-DC coupled high-voltage box. Compared with the prior art, the beneficial effects of the computer program product provided by this invention are the same as those of the active inter-cluster equalization device based on a bidirectional high-voltage DC-DC coupled high-voltage box provided in the above embodiments, and will not be repeated here.

[0042] In particular, according to the embodiments disclosed in this invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this invention include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for executing the apparatus shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from read-only memory 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the apparatus of the embodiments disclosed in this invention.

[0043] It should be understood that the various parts disclosed in this invention can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0044] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. An inter-cluster active equalization device based on a bidirectional high-voltage DC-DC coupled high-voltage box, characterized in that, The device includes: The high-voltage DC bus coupling module is used to connect the high-voltage side output terminal of the bidirectional high-voltage DC-DC converter module in parallel with the corresponding high-voltage box integrated module to build a shared high-voltage DC energy coupling channel between clusters and realize bidirectional energy transmission between multiple battery clusters. The coordination controller module establishes a bidirectional communication connection with the bidirectional high-voltage DC-DC converter module through a communication link. It is used to periodically collect the state parameters of the first battery cluster and the second battery cluster, and execute a dynamic optimization scheduling algorithm based on the state parameters to generate the target energy migration path and the corresponding power control command. The high-voltage box integrated module is integrated with the bidirectional high-voltage DC-DC converter module in the same shell. It is equipped with fuses, disconnect switches, pre-charge circuits and anti-arc unit, and forms a high-voltage power exchange channel with the high-voltage side bus of the first battery cluster and the second battery cluster. The bidirectional high-voltage DC-DC converter module has its power input terminal electrically connected to the first battery cluster, while its power output terminal is connected to the combiner cabinet on the PCS side via a power bus. It is used to achieve bidirectional energy conversion between 1050V and 1500V to support directional energy transfer between clusters. The battery cluster connection module connects the positive and negative terminals of the first battery cluster and the second battery cluster respectively, and forms a closed and controllable energy flow path with the first battery cluster, the second battery cluster and the bidirectional high voltage DC-DC converter module.

2. The inter-cluster active equalization device based on a bidirectional high-voltage DC-DC coupled high-voltage box as described in claim 1, characterized in that, The bidirectional high-voltage DC-DC converter module includes a non-isolated three-level half-bridge topology circuit for bidirectional voltage conversion between 1050V and 1500V.

3. The inter-cluster active equalization device based on a bidirectional high-voltage DC-DC coupled high-voltage box as described in claim 1, characterized in that, In the high-voltage integrated module, the bidirectional high-voltage DC-DC converter module and the high-voltage box integrated module are physically deployed in the same shell. Structurally, they share the same shell, heat dissipation channels and busbar channels, and electrically, they share the same control signal channels and protective grounding paths, which is used to achieve dual optimization of structural integration and functional integration.

4. The inter-cluster active equalization device based on a bidirectional high-voltage DC-DC coupled high-voltage box as described in claim 1, characterized in that, In the coordination controller module, the state parameters include voltage parameters, current parameters, SOC parameters, and temperature parameters; the dynamic optimization algorithm includes an optimization algorithm based on weighted directed graph minimization of the objective.

5. The inter-cluster active equalization device based on a bidirectional high-voltage DC-DC coupled high-voltage box as described in claim 1, characterized in that, The bidirectional high-voltage DC-DC converter module also includes an energy dispatch execution unit, a PWM control unit, and a drive circuit unit. The energy dispatch execution unit is deployed inside the bidirectional high-voltage DC-DC converter module and has a bidirectional communication connection with the coordination controller module. It is also directly connected to the PWM control unit and drive circuit unit of the bidirectional high-voltage DC-DC converter module. It is used to control the bidirectional high-voltage DC-DC converter module to output or absorb current of a specified direction and amplitude according to the received dispatch power command, so as to realize the target energy dispatch between battery clusters.

6. The inter-cluster active equalization device based on a bidirectional high-voltage DC-DC coupled high-voltage box as described in claim 1, characterized in that, The high-voltage DC bus coupling module also includes: the high-voltage DC bus coupling module includes an insulating support structure, and current detection nodes and thermal monitoring nodes.

7. The inter-cluster active equalization device based on a bidirectional high-voltage DC-DC coupled high-voltage box as described in claim 1, characterized in that, The high-voltage box integrated module also includes a safety protection unit, which is connected to the internal circuit of the high-voltage box integrated module. It is used to monitor abnormal states such as overvoltage, overcurrent, short circuit and overtemperature during the energy dispatching process, and sends the monitoring signals to the coordination controller module and the bidirectional high-voltage DC-DC converter module.

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