Direct-current high-voltage control box and energy storage system

Abstract

The invention provides a direct-current high-voltage control box and an energy storage system, the direct-current high-voltage control box comprises a box body, a control box main chip, a battery cluster management module, an isolation module and a DC / DC conversion device, and the control box main chip, the battery cluster management module, the isolation module and the DC / DC conversion device are all arranged in the box body. The control box main chip is respectively connected with one end of the battery cluster management module, one end of the isolation module and one end of the DC / DC conversion device, the other end of the battery cluster management module and the other end of the isolation module are connected in parallel and then are connected with the battery cluster, and the other end of the DC / DC conversion device is connected with other components needing to be controlled by the control box; according to the direct-current high-voltage control box and the energy storage system, the structural stability of the direct-current high-voltage control box can be effectively improved, the safety and reliability of the control box are enhanced, the control strategy of the control box is optimized, the phenomenon that after the control box breaks down, abnormity of all components controlled by the control box cannot be prevented is prevented, and the safety of the control box is improved. And the safety of operation or maintenance personnel is further ensured.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to a direct current high voltage control box and an energy storage system. Background Art

[0002] At present, in electrochemical energy storage systems, DC high-voltage control boxes are widely used, and conventional DC high-voltage control boxes are installed on the battery rack of lithium batteries, and their installation position is at the top or bottom of the battery rack, which makes it very inconvenient for operators both in installation and in operation and maintenance. In particular, when a failure or accident occurs in the energy storage battery container, there is a great safety risk when personnel enter the container to troubleshoot the failure or repair the device. In addition, the high-voltage DC relays commonly used in high-voltage control boxes are only unidirectional and cannot effectively extinguish arcs in both directions. The main contacts are prone to arcing and burning and sticking, which makes them unreliable to use and poses a safety hazard. Therefore, it is of great significance to improve the safety and reliability of DC high-voltage control boxes, enhance the structural stability of the control box, and ensure the safety of operators.

[0003] In patent CN217469215U, a new type of energy storage DC high-voltage control box is disclosed, the control box includes a battery cluster management module, a fuse, a fuse holder, a DC-DC converter, a shunt, a maintenance isolation switch, and a push button switch. The battery cluster management module, the fuse, the fuse holder, the DC-DC converter, the shunt, the maintenance isolation switch and the push button switch are arranged in the inner cavity of the control box, the control box is installed at the external position of the lithium battery battery compartment box, and is structurally isolated from the battery compartment. The control box is installed near the battery cluster and the energy storage converter. The control box can be installed outdoors, with a protection level of IP54 or above. The high-voltage control box is installed nearby together with the battery cluster and the energy storage converter. The high-voltage control box is equipped with overcurrent and short-circuit protection fuses. Professionals can operate outside the container, close or disconnect the system circuit, and repair and replace the components in the high-voltage control box. Placing the control box outside the container can help improve the safety of the control box, but after the control box fails, the safety protection of the batteries in the battery compartment box controlled by it is relatively small. Summary of the invention

[0004] In view of this, the present invention aims to propose a DC high-voltage control box and energy storage system to solve the problems in the prior art that the safety and reliability of the control box are low, and the real-time status of components such as batteries cannot be monitored in time after the control box fails; thereby effectively improving the structural stability of the DC high-voltage control box, enhancing the safety and reliability of the control box, optimizing the control strategy of the control box, and preventing the occurrence of abnormal and unpreventable phenomena in the components controlled by the control box after the control box fails, thereby ensuring the safety of operators or maintenance personnel.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] The present invention relates to a DC high-voltage control box and an energy storage system. The DC high-voltage control box comprises a box body, a control box main chip, a battery cluster management module, an isolation module, and a DC / DC conversion device. The control box main chip, the battery cluster management module, the isolation module, and the DC / DC conversion device are all arranged inside the box body. The control box main chip is respectively connected to one end of the battery cluster management module, the isolation module, and the DC / DC conversion device. The other ends of the battery cluster management module and the isolation module are connected in parallel and then connected to the battery cluster. The other end of the DC / DC conversion device is connected to other components that need to be controlled by the control box.

[0007] Furthermore, other components include any one or more of a PCS, an air conditioning system, and a fire protection system.

[0008] Furthermore, the control box is arranged in parallel with the rack of the battery cluster, and there is a certain gap between the control box and the rack, and the control box is arranged near the door of the container.

[0009] Furthermore, the control box also includes a protection module, which is arranged in the box body and between the control box main chip and the battery cluster management module.

[0010] Furthermore, the protection module adopts a protection circuit including any one or more components of a fuse, a relay, and a circuit breaker.

[0011] Furthermore, the control box also includes a storage device, a shunt processing device and a monitoring device, and the storage device, the shunt processing device and the monitoring device are all connected to the main chip of the control box.

[0012] Furthermore, the storage device, the diversion processing device and the monitoring device are integrated with the main chip of the control box.

[0013] An energy storage system, the system includes the DC high-voltage control box, the system includes a system management platform, and the system management platform is respectively communicatively connected with a battery cluster, a monitoring device, a PCS, an air conditioning system, and a fire protection system.

[0014] Furthermore, the system management platform includes a main controller, a processor, a first memory and a second memory, and the processor, the first memory and the second memory are all connected to the main controller.

[0015] Furthermore, the monitoring device includes a temperature sensor and a humidity sensor, and the temperature sensor and the humidity sensor are connected to the control box main chip and the system management platform respectively.

[0016] Compared with the prior art, the DC high voltage control box and energy storage system described in the present invention have the following beneficial effects:

[0017] Through the setting of the control box, the structural stability of the DC high-voltage control box can be effectively improved, the safety and reliability of the control box can be enhanced, the control strategy of the control box can be optimized, and the occurrence of abnormal and unpreventable phenomena in the components controlled by it can be prevented after the control box fails, thereby ensuring the safety of operators or maintenance personnel. In addition, through the coordinated setting of the energy storage system, it is possible to improve the prevention of abnormal situations inside the control box and the protection of the control box, and it is also possible to improve the protection of the components controlled by the control box, obtain the status information of each component in real time, and effectively realize the pre-prevention of abnormal situations of each component. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations of the present invention.

[0019] In the figure:

[0020] Figure 1 This is a schematic diagram of the overall structure of the control box;

[0021] Figure 2 The internal structure of the control box and the overall structure diagram of the energy storage system in which it is located;

[0022] Figure 3 Schematic diagram of the internal structure of the energy storage system.

[0023] Explanation of the reference numerals: 1. Box body; 2. Control box main chip; 3. Battery cluster management module; 4. Isolation module; 5. DC / DC conversion device; 6. Protection module. DETAILED DESCRIPTION

[0024] The inventive concepts of the present disclosure will be described below using terms commonly used by those skilled in the art to convey the essence of their work to other persons skilled in the art. However, these inventive concepts can be embodied in many different forms and should not be considered limited to the embodiments described herein.

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0027] The control box of this embodiment is similar to a conventional control box in that the overall structure is composed of a box body, wires, and switches.

[0028] In order to solve the problems of low safety and reliability of the control box in the prior art, and the inability to monitor the real-time status of components such as batteries in time after the control box fails; this embodiment proposes a DC high-voltage control box and an energy storage system, wherein the DC high-voltage control box includes a box body 1, a control box main chip 2, a battery cluster management module 3, an isolation module 4, and a DC / DC conversion device 5. The control box main chip 2, the battery cluster management module 3, the isolation module 4, and the DC / DC conversion device 5 are all arranged inside the box body 1, and the control box main chip 2 is respectively connected to one end of the battery cluster management module 3, the isolation module 4, and the DC / DC conversion device 5. The other ends of the battery cluster management module 3 and the isolation module 4 are connected in parallel and connected to the battery cluster, and the other end of the DC / DC conversion device 5 is connected to other components required to be controlled by the control box. Among them, the other components include any one or more of PCS, air conditioning system, and fire protection system. The isolation module 4 is used to bypass the battery cluster management module 3 when it is abnormal, and then perform maintenance to ensure that the circuit can operate normally without interruption. The control box is arranged in parallel with the rack of the battery cluster, and there is a certain gap between the control box and the rack. The control box is arranged near the door of the container to facilitate maintenance and replacement by the staff, and to protect the safety of the operators as much as possible. It can prevent the battery cluster failure from affecting the normal operation of the control box, and prevent the control box failure from affecting the safety of the battery cluster.

[0029] Through the setting of the control box, the structural stability of the DC high-voltage control box can be effectively improved, the safety and reliability of the control box can be enhanced, the control strategy of the control box can be optimized, and the occurrence of abnormal and unpreventable phenomena in the components controlled by the control box after a control box failure can be prevented, thereby ensuring the safety of operators or maintenance personnel.

[0030] The control box also includes a protection module 6, which is arranged in the box body 1. The protection module 6 is arranged between the control box main chip 2 and the battery cluster management module 3. When the battery cluster management module 3 is detected to be abnormal, the circuit is disconnected in time, and the bypass circuit where the isolation module 4 is located is switched through the control box main chip 2 to ensure that the battery cluster can operate stably and continuously, and reduce the energy and cost loss caused by downtime. Among them, the protection module 6 adopts a protection circuit including any one or more components of fuses, relays, and circuit breakers. The box body 1 also includes a fan, which is connected to the system management platform signal in the energy storage system. Under the action of the system management platform in the energy storage system, the fan can be turned on and off, thereby playing a role in cooling the inside of the control box.

[0031] By providing the protection module 6, the stability and safety of the internal circuit of the control box can be effectively improved. While improving the protection of the battery cluster, it is also beneficial to enable the circuit to work uninterruptedly and improve the operational reliability of the circuit.

[0032] The control box also includes a storage device, a shunt processing device and a monitoring device, and the storage device, the shunt processing device and the monitoring device are all connected to the control box main chip 2. The storage device, the shunt processing device and the monitoring device are all arranged in the box body 1. The storage device, the shunt processing device and the monitoring device are integrated with the control box main chip 2 to increase the space occupied by the components in the control box. The storage device is used to store the information collected by the control box main chip 2. The shunt processing device is used to integrate and process the information collected by the control box main chip 2, and after comparing the collected information with the instruction information issued by the system management platform, it is fed back to the control box main chip 2, and the control box main chip 2 accurately controls the voltage, circuit and other parameters that need to be output by different components.

[0033] By setting up storage devices and diversion devices, the control box can effectively realize accurate detection and control of each component. The setting up of monitoring devices is also helpful to ensure the safety of the control box itself.

[0034] The control box also includes a strap setting, at least one strap setting, the wires inside the control box are regulated by the strap, there is a certain gap between the strap and the back plate of the control box, or the strap is fixed on the inner side of the box body 1 of the control box, and the wires pass through the strap setting. Through the setting of the strap, the neatness of the internal lines of the control box can be improved, and the occurrence of bonding caused by the intersection of wires can be prevented. It can improve the aesthetics of the inside of the control box and improve the safety of the wiring of the control box. A swing leaf grille is set on the top of the box body 1, and a fan is set below the swing leaf grille. When the temperature of the control box is too high, the fan is turned on through the regulation of the system management platform, thereby cooling the inside of the control box. Among them, the swing leaf grille is a soft connection plate. On the one hand, it is convenient to discharge air when the fan is running, and on the other hand, it can prevent water droplets, flying insects or dust from entering when the fan is not running, thereby improving the safety of the control box. Hinge and soft connection strips are set between the cabinet door of the box body 1 and the cabinet body. The cabinet door is fixed to the cabinet body by hinges, and a soft connection strip is arranged on the side of the hinge away from the cabinet door, and the two ends of the soft connection strip are respectively arranged to fit the cabinet door and the cabinet body, so as to improve the sealing of the control box. In addition, a wire through hole is arranged on the outside of the control box, and the wire through hole is used to connect the modules in the control box with the modules outside the control box. A film that can be opened and closed is arranged on the inside of the wire through hole, and the center position of the film is a cross-shaped opening, which can facilitate the passage of wires and is dust-proof, waterproof and dust-proof. At least one wire through hole and hinge are provided.

[0035] An energy storage system includes a system management platform, which is respectively connected to a battery cluster, a monitoring device, a PCS, an air conditioning system, and a fire protection system. The system management platform is used to monitor the real-time information of each component in real time, and then respond in time when an abnormality occurs in each component.

[0036] The system management platform includes a main controller, a processor, a first memory and a second memory. The processor, the first memory and the second memory are all connected to the main controller. The first memory is used to store the real-time status information in the control box obtained by the monitoring device, and the second memory is used to store the real-time status information of other components in the system. On the one hand, the main controller can store the preset values ​​corresponding to different components in the corresponding memory. On the other hand, it can also be used to receive the detected real-time information, store the received real-time information in the corresponding storage area, call the preset value and compare it with the actual value, and feedback the real-time status information of each component to the main controller based on the comparison result. After the main controller analyzes it, it issues different types of instructions to the control box, thereby realizing intelligent monitoring of the control box and ensuring the stable operation of the energy storage system.

[0037] The energy storage system management platform can store the detected information separately, which is helpful to prevent data disorder and improve the accuracy and efficiency of the system management platform's control over the control box. The setting of the processor can help enhance the accuracy of the system management platform's processing of the detected information.

[0038] The monitoring device includes a temperature sensor and a humidity sensor, and the temperature sensor and the humidity sensor are respectively connected to the control box main chip 2 and the system management platform. At least two temperature sensors are set. At least one humidity sensor is set. When two temperature sensors are set, one temperature sensor is set at the location of the control box main chip 2 of the control box, and the other temperature sensor is set outside the control box. The system management platform can preliminarily determine whether the internal circuit of the control box is operating normally by comparing the difference in temperature inside and outside the control box. If the temperature is too high, it proves that there is an abnormality. Under the control of the system management platform, the shunt processing device is mobilized for shunt processing to reduce the frequency of use of the position where the temperature of the control box is too high, and then the temperature is physically cooled in time. It can also start the fan in the control box to adjust the temperature in the control box. In addition, the humidity sensor is used to detect the change of humidity in the control box. According to the detection of the humidity change of the control box in different time periods by the system management platform, it can timely detect whether the control box is flooded, so as to arrange the operator to perform maintenance operations in time.

[0039] By communicating with the system management platform through the monitoring device, the real-time status of the control box can be effectively uploaded, which is beneficial to ensuring the safety of the control box and improving the reliability of the energy storage system.

[0040] There are n battery clusters, and all of them are connected to the battery cluster management module 3, which is used to control the battery cluster management module 3 to collect information of each battery cell in different battery clusters under the action of the control box main chip 2, and to summarize and analyze the information in time. It can also perform flexible scheduling according to the state changes of the battery cluster to ensure the stable operation of the battery cluster. When the battery cluster is in an overcharged or over-discharged state, the control box main chip 2 can realize the discharge or charging operation of the battery cluster by controlling the access or disconnection of the PCS. It can also call the air conditioning system to increase or decrease the temperature of the space where the battery cluster is located when the battery cluster is overheated. In addition, when a dangerous situation occurs in the battery cluster and causes a fire, the fire protection system is called in time to handle the abnormality. Among them, the fire protection system includes any one or more of a mobile fire protection device and a sprinkler device. It is used to carry out fire extinguishing in a corresponding manner according to the level of the dangerous situation.

[0041] In the present invention, any control box may include a DC high-voltage control box and an energy storage system structure as described in this embodiment, and based on the relevant structures and assembly relationships of the shunt processing device and the monitoring device provided in this embodiment, the control box also includes conventional components including a box body 1, wires, switches and other structures. Since they are all prior art, they will not be described in detail here.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A DC high voltage control box, characterized in that: The invention comprises a box body (1), a control box main chip (2), a battery cluster management module (3), an isolation module (4), and a DC / DC conversion device (5). The control box main chip (2), the battery cluster management module (3), the isolation module (4), and the DC / DC conversion device (5) are all arranged inside the box body (1). The control box main chip (2) is respectively connected to one end of the battery cluster management module (3), the isolation module (4), and the DC / DC conversion device (5). The other ends of the battery cluster management module (3) and the isolation module (4) are connected in parallel and then connected to the battery cluster. The other end of the DC / DC conversion device (5) is connected to other components required to be controlled by the control box.

2. A DC high voltage control box according to claim 1, characterized in that: The other components include any one or more of a PCS, an air conditioning system, and a fire protection system.

3. A DC high voltage control box according to claim 1, characterized in that: The control box is arranged in parallel with the rack of the battery cluster, and there is a certain gap between the control box and the rack. The control box is arranged near the door of the container.

4. A DC high voltage control box according to claim 2, characterized in that: The control box further comprises a protection module (6), which is arranged in the box body (1) and between the control box main chip (2) and the battery cluster management module (3).

5. A DC high voltage control box according to claim 4, characterized in that: The protection module (6) adopts a protection circuit including any one or more components of a fuse, a relay, and a circuit breaker.

6. A DC high voltage control box according to claim 2, characterized in that: The control box also includes a storage device, a flow distribution processing device and a monitoring device, and the storage device, the flow distribution processing device and the monitoring device are all connected to the control box main chip (2).

7. A DC high voltage control box according to claim 6, characterized in that: The storage device, the flow distribution processing device and the monitoring device are integrated with the control box main chip (2).

8. An energy storage system, characterized in that: The system comprises a DC high-voltage control box according to any one of claims 1 to 7, and the system comprises a system management platform, which is respectively communicatively connected with a battery cluster, a monitoring device, a PCS, an air conditioning system, and a fire protection system.

9. An energy storage system according to claim 8, characterized in that: The system management platform includes a main controller, a processor, a first memory and a second memory, and the processor, the first memory and the second memory are all connected to the main controller.

10. An energy storage system according to claim 8, characterized in that: The monitoring device comprises a temperature sensor and a humidity sensor, and the temperature sensor and the humidity sensor are respectively connected to the control box main chip (2) and the system management platform.

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