High-voltage breaking circuit and high-voltage test box

Abstract

The utility model discloses a high-voltage breaking circuit and a high-voltage test box, and relates to the technical field of energy storage. The high-voltage breaking circuit disclosed by the utility model is arranged between a battery module and an inverter, the high-voltage breaking circuit comprises a contactor, a time relay, a fuse and a molded case circuit breaker, a first end of the contactor is connected with a direct current output end of the battery module, a control end of the contactor is connected with the time relay, and a second end of the contactor is connected with the molded case circuit breaker. The second end of the contactor is connected with the first end of the fuse, the second end of the fuse is connected with the first end of the molded case circuit breaker, and the second end of the molded case circuit breaker is connected with the input end of the inverter; wherein the time relay is used for controlling the timing function to be started after being started and controlling the contactor to be closed after timing is finished, so that a main loop between the battery module and the inverter is conducted. According to the circuit, the safety of field personnel can be ensured through various means, and the personnel can be transferred to a safe place at the moment of switching on, so that electric shock accidents are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a high-voltage disconnecting circuit and a high-voltage test box. Background Art

[0002] With the rapid development of energy storage technology, the energy storage voltage of energy storage mechanisms is getting higher and higher, up to 1500V. In order to prevent the high voltage and high current of energy storage mechanisms from causing harm to the human body, a series of safety measures are usually required to ensure the safety of on-site personnel. Among the many safety measures, setting up a safety disconnection circuit in the energy storage system is an effective method.

[0003] The purpose of the safety disconnect circuit is to ensure personal safety and the normal operation of the equipment. When the circuit needs to be repaired, the equipment needs to be replaced, or a fault occurs, the safety disconnect circuit can disconnect the powered equipment from the battery to prevent the current from continuing to flow, thereby avoiding electric shock accidents and protecting personnel from injury. In addition, the safety disconnect circuit can also prevent damage to the entire system caused by equipment overload, short circuit and other faults.

[0004] In the prior art, safety disconnection circuits usually use devices such as circuit breakers and fuses to achieve safe disconnection of the circuit. However, in the actual operation of the energy storage system, a safety accident may occur at the moment when the battery is closed. If the on-site personnel do not evade in time, a dangerous situation will occur. Therefore, the existing safety disconnection circuit cannot completely ensure the safety of on-site personnel. Utility Model Content

[0005] In view of this, the utility model provides a high-voltage disconnecting circuit and a high-voltage test box, the main purpose of which is to solve the technical problem that the safety disconnecting circuit cannot ensure the safety of on-site personnel at the moment of closing.

[0006] To achieve the above object, the utility model first provides a high-voltage disconnecting circuit, which is arranged between the battery module and the inverter. The high-voltage disconnecting circuit includes a contactor, a time relay, a fuse and a molded case circuit breaker, wherein:

[0007] The first end of the contactor is connected to the DC output end of the battery module, the control end of the contactor is connected to the time relay, the second end of the contactor is connected to the first end of the fuse, the second end of the fuse is connected to the first end of the molded case circuit breaker, and the second end of the molded case circuit breaker is connected to the input end of the inverter;

[0008] The time relay is used to control the timing function to start after startup, and to control the contactor to close after the timing ends, so that the main circuit between the battery module and the inverter is turned on.

[0009] In one embodiment of the utility model, the high-voltage disconnecting circuit also includes an emergency stop operating mechanism, and the molded case circuit breaker includes a switch body and a shunt release, wherein the switch body is connected between the fuse and the inverter, and the contacts of the shunt release are connected to the emergency stop operating mechanism, wherein the emergency stop operating mechanism is used to disconnect the molded case circuit breaker after being triggered to cut off the main circuit between the battery module and the inverter.

[0010] In one embodiment of the utility model, the emergency stop operating mechanism includes a first emergency stop operating mechanism arranged in the high-voltage disconnecting circuit, and / or a second emergency stop operating mechanism arranged on the remote control terminal, wherein the first emergency stop operating mechanism and the second emergency stop operating mechanism are connected to the contacts of the shunt release through a group of cables connected in parallel.

[0011] In one embodiment of the utility model, a limit contact is arranged inside the shunt release, wherein the limit contact is used to cut off the power supply at the opening position and the tripping position when the voltage in the main circuit reaches a preset voltage range.

[0012] In one embodiment of the utility model, the contactor includes a positive contactor and a negative contactor, wherein the first end of the positive contactor is connected to the positive output end of the battery module, the second end of the positive contactor is connected to the first end of the fuse, and the control end of the positive contactor is connected to the time relay; the first end of the negative contactor is connected to the negative output end of the battery module, the second end of the negative contactor is connected to the first end of the molded case circuit breaker, and the control end of the negative contactor is connected to the time relay.

[0013] In one embodiment of the present invention, the fuse is a fusible wire, wherein the fusible wire is connected between the positive contactor and the molded case circuit breaker.

[0014] In one embodiment of the utility model, the first end of the molded case circuit breaker includes a first connection terminal and a third connection terminal, and the second end of the molded case circuit breaker includes a second connection terminal and a fourth connection terminal, wherein the first connection terminal is connected to the second end of the negative contactor, the third connection terminal is connected to the second end of the fuse, the second connection terminal is connected to the negative input terminal of the inverter, and the fourth connection terminal is connected to the positive input terminal of the inverter, wherein the first connection terminal and the second connection terminal constitute a first switch, the third connection terminal and the fourth connection terminal constitute a second switch, and the first switch and the second switch are in a linkage relationship.

[0015] In one embodiment of the utility model, the time relay includes a time setting mechanism and a timing start mechanism, wherein the time setting mechanism is used to set the timing time of the time relay, and the timing start mechanism is used to close the connection contacts of the time relay after being triggered and after the timing ends to control the contactor to be closed.

[0016] In one embodiment of the utility model, the high-voltage disconnecting circuit also includes a battery quick-plug interface and / or an inverter quick-plug interface, wherein the battery quick-plug interface is connected to the first end of the contactor, wherein the battery quick-plug interface is used to enable the high-voltage disconnecting circuit to be pluggable with the battery module; the inverter quick-plug interface is connected to the second end of the molded case circuit breaker, wherein the inverter quick-plug interface is used to enable the high-voltage disconnecting circuit to be pluggable with the inverter.

[0017] In addition, to achieve the above-mentioned purpose, the utility model also proposes a high-voltage test box, including a box body and the above-mentioned high-voltage disconnecting circuit, wherein the high-voltage disconnecting circuit is arranged in the box body.

[0018] The utility model provides a high-voltage disconnecting circuit and a high-voltage test box, wherein the high-voltage disconnecting circuit includes a variety of power supply on-off devices such as contactors, time relays, fuses and molded case circuit breakers. The above circuit can ensure the safety of on-site personnel in a high-voltage or high-current environment by various safety means such as blowing a fuse or disconnecting the main circuit by a molded case circuit breaker. In addition, by connecting a time relay to the control end of the contactor, the above circuit can control the conduction of the main circuit between the battery module and the inverter after the time relay is started, so that the on-site personnel have time to move to a safe place. In this way, it can be avoided that the on-site personnel are unable to dodge when a safety accident occurs at the moment of closing the switch, thereby ensuring the life safety of the on-site personnel to the greatest extent and avoiding the occurrence of electric shock accidents.

[0019] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present invention and constitute a part 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 an improper limitation on the present invention. In the drawings:

[0021] Figure 1A schematic structural diagram of a high-voltage disconnecting circuit provided by an embodiment of the utility model is shown;

[0022] Figure 2 A circuit diagram of a high-voltage disconnecting circuit provided by an embodiment of the utility model is shown;

[0023] Figure 3 A schematic diagram of a time-current characteristic curve provided by an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0025] In order to further explain the technical means and effects adopted by the utility model to achieve the predetermined utility model purpose, the specific implementation methods, structures, features and effects of the utility model application are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0026] Combine the following Figures 1 to 3 A high voltage disconnecting circuit according to some embodiments of the present invention is described.

[0027] like Figure 1 As shown, this embodiment proposes a high-voltage disconnecting circuit, which is arranged between the battery module and the inverter. The high-voltage disconnecting circuit includes a contactor, a time relay, a fuse and a molded case circuit breaker, wherein the first end of the contactor is connected to the DC output end of the battery module, the control end of the contactor is connected to the time relay, the second end of the contactor is connected to the first end of the fuse, the second end of the fuse is connected to the first end of the molded case circuit breaker, and the second end of the molded case circuit breaker is connected to the input end of the inverter. In this embodiment, the time relay is used to control the timing function to start after startup, and control the contactor to be attracted after the timing ends, so that the main circuit between the battery module and the inverter is turned on.

[0028] Specifically, the high-voltage disconnecting circuit provided in this embodiment is a key connecting part between the battery module and the inverter, which can ensure the safety and reliability of power transmission. The above-mentioned high-voltage disconnecting circuit combines multiple electrical components such as contactors, time relays, fuses and molded case circuit breakers. In the environment of high voltage or high current, the safety of on-site personnel can be ensured by controlling multiple devices. In this embodiment, the control end of the contactor is connected to the time relay, and the delayed power-on of the circuit can be realized through the delay control of the time relay. When the contactor receives the start signal from the time relay after the delay, the contactor will be connected to the fuse, thereby constructing a channel for power transmission. As a safety protection element of the circuit, the fuse can automatically melt and cut off the circuit when the current increases abnormally, thereby preventing safety accidents such as equipment damage or fire caused by excessive current. As another safety barrier in the circuit, the molded case circuit breaker can quickly cut off the circuit when a fault or abnormality occurs in the circuit, thereby protecting the safety of the inverter and other electrical equipment.

[0029] In this embodiment, after the time relay is started, the timing function will be controlled to start. After the set time is over, the time relay will send a signal to control the contactor to close, so that the main circuit between the battery module and the inverter is turned on. This circuit design method not only ensures the stable operation of the circuit, but also ensures that the on-site personnel can stay away from the control area at the moment of closing the switch, thereby ensuring the safety of the entire system. Based on this, the above circuit ensures the safety of personnel and equipment through the characteristics of delayed power-on and fast power-off, thereby ensuring the reliable operation of the circuit system.

[0030] It should be noted that the circuit function of the high-voltage disconnecting circuit provided in this embodiment is mainly realized by the circuit connection relationship between each circuit module, and does not rely on the program module in a certain circuit module. In addition, each circuit module in the high-voltage disconnecting circuit can be realized by an analog circuit or a digital circuit, and for the circuit module that can be implanted with a program module, the realization of its module function can be realized by the program module provided by the prior art.

[0031] The high-voltage disconnecting circuit proposed in the embodiment of the utility model can ensure the safety of on-site personnel in a high-voltage or high-current environment by various safety means such as blowing a fuse or disconnecting the main circuit by a molded case circuit breaker. In addition, by connecting a time relay to the control end of the contactor, the above circuit can control the conduction of the main circuit between the battery module and the inverter after the time relay is started, so that the on-site personnel have time to move to a safe place. In this way, it can be avoided that the on-site personnel are unable to dodge when a safety accident occurs at the moment of closing the switch, thereby ensuring the life safety of the on-site personnel to the greatest extent and avoiding the occurrence of electric shock accidents.

[0032] In one embodiment of the present invention, Figure 2 As shown, the high-voltage disconnecting circuit also includes an emergency stop operating mechanism, and the above-mentioned molded case circuit breaker includes a switch body and a shunt release, wherein the switch body is connected between the fuse and the inverter, and the contacts of the shunt release are connected to the emergency stop operating mechanism, wherein the emergency stop operating mechanism can be used to disconnect the molded case circuit breaker after being triggered to cut off the main circuit between the battery module and the inverter.

[0033] Specifically, the above-mentioned high-voltage disconnecting circuit also includes an emergency stop operating mechanism to enhance the safety and emergency response capability of the circuit. Among them, the interior of the molded case circuit breaker includes two parts: a switch body and a shunt release. The switch body is responsible for the transmission of electric energy. It is connected between the fuse and the inverter to ensure that the current can flow smoothly to the inverter. The shunt release is a key component in the molded case circuit breaker, and its contacts are connected to the emergency stop operating mechanism. When the emergency stop operating mechanism is triggered, it can quickly transmit a signal to the shunt release, causing the shunt release to operate and then disconnect the molded case circuit breaker. This design allows the operator to quickly cut off the main circuit between the battery module and the inverter by triggering the emergency stop operating mechanism in an emergency, thereby preventing circuit failures or safety accidents. The existence of the emergency stop operating mechanism provides additional safety protection for the high-voltage disconnecting circuit. During the operation of the circuit, once an abnormal situation occurs or an emergency shutdown is required, the operator can quickly and effectively cut off the main circuit through the emergency stop operating mechanism to ensure the safety and stability of the entire system. This design not only improves the reliability of the circuit, but also reduces operational risks, providing strong support for the stable operation of power equipment.

[0034] In one embodiment of the present invention, Figure 2 As shown, the emergency stop operating mechanism includes a first emergency stop operating mechanism arranged in the high-voltage disconnecting circuit, and / or a second emergency stop operating mechanism arranged on the remote control terminal, wherein the first emergency stop operating mechanism and the second emergency stop operating mechanism are connected to the contacts of the shunt release through a group of cables connected in parallel.

[0035] Specifically, the emergency stop operating mechanism in the high-voltage disconnecting circuit can realize two control modes: local emergency stop and remote emergency stop. Specifically, the emergency stop operating mechanism includes two forms: one is the first emergency stop operating mechanism directly set in the high-voltage disconnecting circuit, which allows the operator to directly perform emergency stop operation on the circuit on site; the other is the second emergency stop operating mechanism set on the remote control terminal. This design enables the operator to quickly cut off the circuit through the remote control terminal when away from the site, thereby realizing the remote emergency stop function. In this embodiment, the first emergency stop operating mechanism and the second emergency stop operating mechanism can be connected to the contacts of the shunt release through a group of parallel-connected cables. This parallel connection method ensures that whether it is on-site operation or remote operation, as long as any emergency stop operating mechanism is triggered, the signal can be quickly transmitted to the shunt release, thereby realizing the emergency disconnection of the circuit. This design not only improves the safety and flexibility of the high-voltage disconnecting circuit, but also facilitates the daily management and maintenance work of the operator. Whether on site or at the remote control terminal, the operator can select a suitable emergency stop operating mechanism according to actual needs and quickly cut off the circuit to ensure the stable operation of the entire system.

[0036] In one embodiment of the utility model, a limit contact is provided inside the shunt release, wherein the limit contact can be used to cut off the power supply at the opening position and the tripping position when the voltage in the main circuit reaches a preset voltage range.

[0037] Specifically, as an important part of the molded case circuit breaker, the shunt release has a limit contact inside. This design enables the shunt release to have a higher level of safety protection function. When the voltage in the main circuit reaches the preset voltage range, the limit contact will respond quickly and accurately cut off the power supply at the opening position and the tripping position. For example, when the rated voltage of the shunt release of the molded case circuit breaker is AC220V, when the voltage reaches 70% to 110% of the rated voltage, the release can be operated, wherein the shunt release is internally provided with a limit contact, which can be used to cut off the power supply at the opening position and the tripping position. This function can effectively prevent circuit failures caused by excessive voltage and ensure the stable operation of the entire power system. At the same time, the setting of the limit contact also makes the action of the shunt release more accurate and reliable, and improves the safety performance of the circuit. Through this design, the high-voltage disconnecting circuit can quickly cut off the power supply when responding to emergency situations such as voltage abnormalities, preventing equipment damage and safety accidents.

[0038] In one embodiment of the present invention, Figure 2As shown, the contactor includes a positive contactor and a negative contactor, wherein the first end of the positive contactor is connected to the positive output end of the battery module, the second end of the positive contactor is connected to the first end of the fuse, and the control end of the positive contactor is connected to the time relay; the first end of the negative contactor is connected to the negative output end of the battery module, the second end of the negative contactor is connected to the first end of the molded case circuit breaker, and the control end of the negative contactor is connected to the time relay.

[0039] Specifically, the contactor includes a positive contactor and a negative contactor. Among them, the first end of the positive contactor is connected to the positive output end of the battery module to ensure the smooth outflow of the positive electric energy, and the second end of the positive contactor is connected to the first end of the fuse to form a path for electric energy transmission. The control end of the positive contactor is connected to the time relay, and the delay control operation of the positive contactor can be realized through the timing function of the time relay. At the same time, the first end of the negative contactor is connected to the negative output end of the battery module to ensure the smooth outflow of the negative electric energy. The second end of the negative contactor is connected to the first end of the molded case circuit breaker to form a path for electric energy transmission. Similarly, the control end of the negative contactor is also connected to the time relay, and the control signal of the time relay is used to realize the precise control of the negative contactor. The above design enables the contactor to accurately control the electric energy transmission between the battery module and the inverter, ensuring the stability and safety of the circuit. At the same time, through the control of the time relay, the functions of delayed start and automatic disconnection of the circuit can also be realized, thereby improving the intelligent control level of the entire circuit system.

[0040] In one embodiment of the present invention, Figure 2 As shown, the fuse is a fusible link, wherein the fusible link is connected between the positive contactor and the molded case circuit breaker.

[0041] Specifically, the fuse can play a role in safety protection, and it uses a fuse as a core component. Among them, the fuse is connected between the positive contactor and the molded case circuit breaker, forming an important link in the power transmission path. The fuse has a specific fusing current value. When the current in the circuit exceeds this set value, the fuse will quickly blow, thereby cutting off the connection between the positive contactor and the molded case circuit breaker. This design is intended to prevent damage to circuits and equipment caused by excessive current and ensure the safe operation of the power system. At the same time, the fast-blow characteristics of the fuse can also quickly cut off the power supply when a circuit fault occurs to prevent the fault from expanding, thereby reducing the risk of accidents.

[0042] In one embodiment of the present invention, Figure 2As shown, the first end of the molded case circuit breaker includes a first connection terminal and a third connection terminal, and the second end of the molded case circuit breaker includes a second connection terminal and a fourth connection terminal, wherein the first connection terminal is connected to the second end of the negative contactor, the third connection terminal is connected to the second end of the fuse, the second connection terminal is connected to the negative input terminal of the inverter, and the fourth connection terminal is connected to the positive input terminal of the inverter. The first connection terminal and the second connection terminal constitute a first switch, and the third connection terminal and the fourth connection terminal constitute a second switch, and the first switch and the second switch are in a linkage relationship.

[0043] Specifically, the first end of the molded case circuit breaker is provided with a first connection terminal and a third connection terminal, and the second end is provided with a second connection terminal and a fourth connection terminal. Among them, the first connection terminal is connected to the second end of the negative contactor to ensure the smooth flow of negative electric energy. The third connection terminal is connected to the second end of the fuse to form an electric energy transmission path between the fuse and the molded case circuit breaker. The second connection terminal is connected to the negative input terminal of the inverter, and the fourth connection terminal is connected to the positive input terminal of the inverter, ensuring that the inverter can obtain a stable power supply. In this embodiment, the first connection terminal and the second connection terminal in the molded case circuit breaker constitute a first switch, and the third connection terminal and the fourth connection terminal constitute a second switch. There is a linkage relationship between the two switches, that is, when one switch is actuated, the other switch will also act accordingly. This design not only improves the safety of the circuit, but also makes the operation more convenient. Through the above circuit design method, the molded case circuit breaker can realize efficient and safe transmission of electric energy in the high-voltage disconnecting circuit, thereby providing a strong guarantee for the stable operation of the entire circuit system.

[0044] In one embodiment of the utility model, the time relay includes a time setting mechanism and a timing starting mechanism. The time setting mechanism is used to set the timing time of the time relay. The timing starting mechanism is used to close the connection contacts of the time relay after being triggered and after the timing ends to control the contactor to be attracted.

[0045] Specifically, the time relay is a key component in the high-voltage disconnecting circuit. It can control the delayed closing of the contactor by accurately controlling the time. In this embodiment, the time relay is mainly composed of a time setting mechanism and a timing start mechanism. Among them, the time setting mechanism allows the user to flexibly set the timing time of the time relay according to actual needs. This function enables the time relay to adapt to different working scenarios and meet different control requirements. The timing start mechanism is the core part of the time relay. When the mechanism is triggered, it will start timing and close the connection contacts of the time relay after the timing ends. This action will control the contactor to close, and then control the main circuit between the battery module and the inverter to be turned on. By accurately controlling the timing process and contact closure, the timing start mechanism ensures the safe and reliable operation of the circuit. In this embodiment, the design form of the time setting mechanism and the timing start mechanism can be set according to actual conditions, and this implementation is not specifically limited. For example, the time setting mechanism can be designed in the form of a knob, and the user can control the timing time by rotating the position of the knob. The timing start mechanism can be designed as a self-locking switch, and the user can control the timing start after pressing the self-locking switch, and after the user leaves the device to a safe distance, the contactor is automatically attracted. At this time, the closing indicator light is on, and the battery module and the inverter are safely connected. In the above embodiment, by controlling the coordinated work of the time setting mechanism and the timing start mechanism of the time relay, precise control of the delayed opening and closing operation of the contactor can be achieved, thereby providing a strong guarantee for the safe operation of the high-voltage disconnecting circuit.

[0046] In one embodiment of the present invention, Figure 2 As shown, the high-voltage disconnecting circuit also includes a battery quick-plug interface and / or an inverter quick-plug interface, wherein the battery quick-plug interface is connected to the first end of the contactor, and the battery quick-plug interface can be used to enable a pluggable connection between the high-voltage disconnecting circuit and the battery module; the inverter quick-plug interface is connected to the second end of the molded case circuit breaker, and the inverter quick-plug interface can be used to enable a pluggable connection between the high-voltage disconnecting circuit and the inverter.

[0047] Specifically, the above-mentioned high-voltage disconnecting circuit also includes a battery quick-plug interface and an inverter quick-plug interface. By setting the quick-plug interface in the high-voltage disconnecting circuit, the circuit can be adapted to the new energy industry, and the circuit can be quickly plugged and unplugged to achieve a connection between the battery module and the electrical equipment, thereby enhancing the flexibility and convenience of the circuit. Among them, the battery quick-plug interface is connected to the first end of the contactor, which can realize a pluggable connection between the high-voltage disconnecting circuit and the battery module. Through simple plug-in operations, users can quickly connect or disconnect the battery module to the high-voltage disconnecting circuit without complicated fixing or connection steps, which greatly improves the convenience of operation. Similarly, the inverter quick-plug interface is connected to the second end of the molded case circuit breaker, which can realize a pluggable connection between the high-voltage disconnecting circuit and the inverter. This function makes the replacement and maintenance of the inverter simpler and more efficient, and reduces the inconvenience caused by disassembly and installation. The introduction of the battery quick-plug interface and the inverter quick-plug interface not only simplifies the circuit connection process, but also improves the maintainability of the system. When the battery module or inverter needs to be replaced, the user only needs to plug and unplug to complete it, without having to worry about complicated line connection issues, which improves the operating efficiency of the entire circuit system.

[0048] On the other hand, an embodiment of the utility model provides a high-voltage test box, which includes a box body and the high-voltage disconnecting circuit described in any one of the above embodiments, wherein the above-mentioned high-voltage disconnecting circuit is arranged in the above-mentioned box body, and the above-mentioned box body is in a closed state when the high-voltage disconnecting circuit is working.

[0049] Specifically, the high-voltage test box is a device specially used for circuit testing and verification under high-voltage environment, and one of its core components is the high-voltage disconnecting circuit. The high-voltage test box mainly includes a box body and a high-voltage disconnecting circuit integrated therein. Among them, the box body, as the shell of the high-voltage test box, not only has sufficient mechanical strength, but also has excellent insulation performance, ensuring that the circuit inside the test box operates safely and stably under high-voltage environment. When the high-voltage disconnecting circuit is in working state, the box body remains in a closed state, which can effectively prevent external dust, moisture and other impurities from entering the test box and ensure the accuracy of the test results. At the same time, the closed box body can also effectively reduce the leakage of electromagnetic radiation and protect the safety of the operator. In addition, the box body can usually be provided with an observation window and an operation panel, which is convenient for the operator to monitor the test process in real time and make necessary operational adjustments. The above-mentioned high-voltage test box can provide a safe, reliable and efficient test environment for circuit testing under high-voltage environment by integrating the high-voltage disconnecting circuit and keeping the box body closed during the test process. Specific embodiment:

[0051] In one embodiment, Figure 1As shown, a high-voltage disconnecting circuit is provided, which is arranged between the battery module and the inverter. The high-voltage disconnecting circuit includes a contactor, a time relay, a fuse and a molded case circuit breaker, wherein the first end of the contactor is connected to the DC output end of the battery module, the control end of the contactor is connected to the time relay, the second end of the contactor is connected to the first end of the fuse, the second end of the fuse is connected to the first end of the molded case circuit breaker, and the second end of the molded case circuit breaker is connected to the input end of the inverter. In this embodiment, the time relay can be used to control the timing function to start after startup, and control the contactor to be attracted after the timing ends, so that the main circuit between the battery module and the inverter is turned on.

[0052] In this embodiment, if Figure 2 As shown, the high-voltage disconnecting circuit also includes an emergency stop operating mechanism, and the molded case circuit breaker includes a switch body and a shunt release, wherein the switch body is connected between the fuse and the inverter, and the contacts of the shunt release are connected to the emergency stop operating mechanism. The emergency stop operating mechanism is used to disconnect the molded case circuit breaker after being triggered to cut off the main circuit between the battery module and the inverter.

[0053] In this embodiment, if Figure 2 As shown, the emergency stop operating mechanism includes a first emergency stop operating mechanism arranged in the high-voltage disconnecting circuit, and / or a second emergency stop operating mechanism arranged on the remote control terminal, and the first emergency stop operating mechanism and the second emergency stop operating mechanism are connected to the contacts of the shunt release through a group of cables connected in parallel.

[0054] In this embodiment, a limit contact is provided inside the shunt release, and the limit contact is used to cut off the power supply at the opening position and the tripping position when the voltage in the main circuit reaches a preset voltage range.

[0055] In this embodiment, if Figure 2 As shown, the contactor includes a positive contactor and a negative contactor, wherein the first end of the positive contactor is connected to the positive output end of the battery module, the second end of the positive contactor is connected to the first end of the fuse, and the control end of the positive contactor is connected to the time relay; the first end of the negative contactor is connected to the negative output end of the battery module, the second end of the negative contactor is connected to the first end of the molded case circuit breaker, and the control end of the negative contactor is connected to the time relay.

[0056] In this embodiment, if Figure 2 As shown, the fuse is a fusible link, which is connected between the positive contactor and the molded case circuit breaker.

[0057] In this embodiment, if Figure 2As shown, the first end of the molded case circuit breaker includes a first connection terminal and a third connection terminal, and the second end of the molded case circuit breaker includes a second connection terminal and a fourth connection terminal, wherein the first connection terminal is connected to the second end of the negative contactor, the third connection terminal is connected to the second end of the fuse, the second connection terminal is connected to the negative input terminal of the inverter, and the fourth connection terminal is connected to the positive input terminal of the inverter. The first connection terminal and the second connection terminal constitute a first switch, and the second connection terminal and the fourth connection terminal constitute a second switch, and the first switch and the second switch are in a linkage relationship.

[0058] In this embodiment, the time relay includes a time setting mechanism and a timing start mechanism, wherein the time setting mechanism is used to set the timing time of the time relay, and the timing start mechanism is used to close the connection contacts of the time relay after being triggered and the timing ends to control the contactor to be attracted.

[0059] In this embodiment, if Figure 2 As shown, the high-voltage disconnecting circuit also includes a battery quick-plug interface and / or an inverter quick-plug interface, wherein the battery quick-plug interface is connected to the first end of the contactor, and the battery quick-plug interface can be used to enable a pluggable connection between the high-voltage disconnecting circuit and the battery module; the inverter quick-plug interface is connected to the second end of the molded case circuit breaker, and the inverter quick-plug interface can be used to enable a pluggable connection between the high-voltage disconnecting circuit and the inverter.

[0060] This embodiment further provides a high-voltage test box, which includes a box body and the above-mentioned high-voltage disconnecting circuit, wherein the high-voltage disconnecting circuit is arranged in the above-mentioned box body.

[0061] The high-voltage disconnecting circuit proposed in the above embodiment can ensure the safety of on-site personnel in a high-voltage or high-current environment by various safety means such as blowing a fuse or disconnecting the main circuit by a molded case circuit breaker. In addition, by connecting a time relay to the control end of the contactor, the above circuit can control the conduction of the main circuit between the battery module and the inverter after the time relay is started, so that the on-site personnel have time to move to a safe place. In this way, it can be avoided that the on-site personnel are unable to dodge when a safety accident occurs at the moment of closing the switch, thereby ensuring the life safety of the on-site personnel to the greatest extent and avoiding the occurrence of electric shock accidents.

[0062] Furthermore, Figure 3The time-current characteristic curve diagram shown intuitively shows the collaborative working effect of each component in the high-voltage disconnection circuit in the above embodiment during the startup process. Through this time-current characteristic curve diagram, we can see the important role of the time relay in ensuring the safety of on-site personnel. Specifically, when the circuit is started, the time relay starts timing. During the timing process, the on-site personnel have enough time to move to a safe place. When the timing is over, the time relay controls the contactor to be attracted, at which time the main circuit between the battery module and the inverter is turned on, and the current begins to flow. In this time-current characteristic curve diagram, we can see the expected change of current value over time at different voltage levels. Within the set time range, the current gradually reaches the expected stable value, which reflects the performance of the high-voltage disconnection circuit under normal working conditions. Once an abnormality occurs in the circuit, such as the current exceeds the set threshold, the fuse will quickly blow, or the molded case circuit breaker will trip and disconnect the main circuit, thereby cutting off the power supply, preventing circuit failures from causing damage to equipment and personnel, and effectively avoiding the occurrence of electric shock accidents.

[0063] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A high voltage breaking circuit, characterized in that: The high-voltage disconnecting circuit is arranged between the battery module and the inverter, and the high-voltage disconnecting circuit includes a contactor, a time relay, a fuse and a molded case circuit breaker, wherein: The first end of the contactor is connected to the DC output end of the battery module, the control end of the contactor is connected to the time relay, the second end of the contactor is connected to the first end of the fuse, the second end of the fuse is connected to the first end of the molded case circuit breaker, and the second end of the molded case circuit breaker is connected to the input end of the inverter; The time relay is used to control the timing function to start after startup, and to control the contactor to close after the timing ends, so that the main circuit between the battery module and the inverter is turned on.

2. The high voltage disconnecting circuit according to claim 1, characterized in that: The high-voltage disconnecting circuit also includes an emergency stop operating mechanism, and the molded case circuit breaker includes a switch body and a shunt release, wherein: The switch body is connected between the fuse and the inverter, and the contacts of the shunt release are connected to the emergency stop operating mechanism, wherein the emergency stop operating mechanism is used to disconnect the molded case circuit breaker after being triggered to cut off the main circuit between the battery module and the inverter.

3. The high voltage disconnecting circuit according to claim 2, characterized in that: The emergency stop operating mechanism includes a first emergency stop operating mechanism arranged in the high-voltage disconnecting circuit, and / or a second emergency stop operating mechanism arranged on the remote control terminal, wherein the first emergency stop operating mechanism and the second emergency stop operating mechanism are connected to the contacts of the shunt release through a group of cables connected in parallel.

4. The high voltage disconnecting circuit according to claim 2 or 3, characterized in that: A limit contact is arranged inside the shunt release, wherein the limit contact is used to cut off the power supply at the opening position and the tripping position when the voltage in the main circuit reaches a preset voltage range.

5. The high voltage disconnecting circuit according to claim 1, characterized in that: The contactor includes a positive contactor and a negative contactor, wherein: The first end of the positive contactor is connected to the positive output end of the battery module, the second end of the positive contactor is connected to the first end of the fuse, and the control end of the positive contactor is connected to the time relay; The first end of the negative contactor is connected to the negative output end of the battery module, the second end of the negative contactor is connected to the first end of the molded case circuit breaker, and the control end of the negative contactor is connected to the time relay.

6. The high voltage disconnecting circuit according to claim 5, characterized in that: The fuse is a fusible link, wherein the fusible link is connected between the positive contactor and the molded case circuit breaker.

7. The high voltage disconnecting circuit according to claim 5 or 6, characterized in that: The first end of the molded case circuit breaker includes a first connection terminal and a third connection terminal, and the second end of the molded case circuit breaker includes a second connection terminal and a fourth connection terminal, wherein: The first connection terminal is connected to the second end of the negative contactor, the third connection terminal is connected to the second end of the fuse, the second connection terminal is connected to the negative input terminal of the inverter, and the fourth connection terminal is connected to the positive input terminal of the inverter, wherein the first connection terminal and the second connection terminal constitute a first switch, the third connection terminal and the fourth connection terminal constitute a second switch, and the first switch and the second switch are in a linkage relationship.

8. The high voltage disconnecting circuit according to claim 1, characterized in that: The time relay includes a time setting mechanism and a timing start mechanism, wherein the time setting mechanism is used to set the timing time of the time relay, and the timing start mechanism is used to close the connection contacts of the time relay after being triggered and the timing ends to control the contactor to be attracted.

9. The high voltage disconnecting circuit according to claim 1, characterized in that: The high-voltage disconnect circuit also includes a battery quick-plug interface and / or an inverter quick-plug interface, wherein: The battery quick-plug interface is connected to the first end of the contactor, wherein the battery quick-plug interface is used to enable the high-voltage disconnecting circuit to be pluggable with the battery module; The inverter quick-plug interface is connected to the second end of the molded case circuit breaker, wherein the inverter quick-plug interface is used to enable the high-voltage disconnecting circuit to be pluggable connected to the inverter.

10. A high voltage test box, characterized in that: The invention comprises a box and a high-voltage disconnecting circuit as claimed in any one of claims 1 to 9, wherein the high-voltage disconnecting circuit is arranged in the box.

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