High-voltage box

Abstract

The embodiment of the utility model discloses a high-voltage box. The high-voltage box comprises a high-voltage box body; a first maintenance switch; the first battery interface is arranged on the high-voltage box body, and the first battery interface is electrically connected with the first terminal of the first maintenance switch; the first power interface is arranged on the high-voltage box body, and the first power interface is electrically connected with the second terminal of the first maintenance switch; the power supply interface comprises a power supply positive electrode and a power supply negative electrode which are arranged on the high-voltage box body, the power supply positive electrode is electrically connected with a third terminal of the first maintenance switch, and the power supply negative electrode is electrically connected with a fourth terminal of the first maintenance switch; therefore, an isolation switch or a relay with a relatively large size in the high-voltage box is replaced by a maintenance switch with a relatively small size, so that the size of the high-voltage box can be reduced, and the manufacturing cost of the high-voltage box is greatly reduced.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a high-voltage box. Background Art

[0002] In an energy storage system, a battery pack consists of several cells connected in series. These cells are then connected to a high-voltage box to form a cluster. Each cluster is controlled by a high-voltage box, which primarily connects and disconnects the system's main electrical circuit. The high-voltage box integrates various high-voltage components to ensure the transmission of power and electrical energy throughout the vehicle system and to detect insulation faults, circuit breaks, ground faults, and other high-voltage faults throughout the high-voltage system. Its primary functions include controlling the charge and discharge process, collecting battery cluster voltage and current data, and controlling and protecting contactors.

[0003] In the related art, the high-voltage box usually uses an isolating switch or a circuit breaker to connect or disconnect the main electrical circuit of the system. Due to the large size of the isolating switch and the circuit breaker, the high-voltage box is large in size and high in cost. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the present application provides a high-voltage box, which aims to solve the technical problems of the high-voltage box in the existing technology being large in size and high in cost.

[0005] To solve the above problems, the present application provides a high-voltage box, which includes:

[0006] High-voltage box body;

[0007] First maintenance switch;

[0008] A first battery interface is provided on the high-voltage box body, and the first battery interface is electrically connected to a first terminal of a first maintenance switch;

[0009] A first power interface is provided on the high-voltage box body, and the first power interface is electrically connected to the second terminal of the first maintenance switch;

[0010] The power supply interface includes a positive power supply electrode and a negative power supply electrode. The positive power supply electrode and the negative power supply electrode are arranged on the high-voltage box body. The positive power supply electrode is electrically connected to the third terminal of the first maintenance switch, and the negative power supply electrode is electrically connected to the fourth terminal of the first maintenance switch.

[0011] Furthermore, in the high-voltage box provided in the present application, the first maintenance switch includes a plug and a socket;

[0012] The first terminal and the third terminal of the first maintenance switch are arranged on the plug, and the second terminal and the fourth terminal of the first maintenance switch are arranged on the socket.

[0013] Furthermore, in the high-voltage box provided in the present application, the high-voltage box body is provided with a cavity, and the socket and the plug are provided in the cavity.

[0014] Furthermore, in the high-voltage box provided in the present application, the high-voltage box further includes a second maintenance switch;

[0015] The fourth terminal of the first maintenance switch is electrically connected to the negative power supply electrode through the second maintenance switch.

[0016] Furthermore, in the high-voltage box provided in the present application, the second maintenance switch is provided on the high-voltage box body.

[0017] Furthermore, in the high-voltage box provided in the present application, the high-voltage box further includes a first contactor, one end of the first contactor is electrically connected to the first battery interface, and the other end of the first contactor is electrically connected to the first terminal of the first maintenance switch; or / and,

[0018] The high-voltage box further includes a fuse, one end of the fuse is electrically connected to the first battery interface, and the other end of the fuse is electrically connected to the first terminal of the first maintenance switch; or / and,

[0019] The high-voltage box further includes a Hall sensor, one end of the Hall sensor is electrically connected to the first battery interface, and the other end of the Hall sensor is electrically connected to the first terminal of the first maintenance switch; or / and,

[0020] The high-voltage box further includes a battery collection interface, which is provided on the high-voltage box body and electrically connected to the first terminal of the first maintenance switch and the first battery interface respectively; or / and,

[0021] The high-voltage box also includes an indicator light, which is electrically connected to the positive power supply electrode and the negative power supply electrode, and is arranged on the high-voltage box body.

[0022] Furthermore, in the high-voltage box provided in this application, the high-voltage box also includes:

[0023] a pre-charging resistor, one end of the pre-charging resistor being electrically connected to the first battery interface and one end of the first contactor respectively;

[0024] The second contactor has one end electrically connected to the other end of the pre-charging resistor, and the other end of the second contactor is electrically connected to the fourth terminal of the second maintenance switch and the other end of the first contactor.

[0025] Furthermore, in the high-voltage box provided in this application, the high-voltage box also includes:

[0026] Third maintenance switch;

[0027] A second battery interface is provided on the high-voltage box body, and the second battery interface is electrically connected to the first terminal of the third maintenance switch;

[0028] A second power interface is provided on the high-voltage box body, and the second power interface is electrically connected to the second terminal of the third maintenance switch;

[0029] The positive power supply electrode is electrically connected to the third terminal of the third maintenance switch, and the negative power supply electrode is electrically connected to the fourth terminal of the third maintenance switch.

[0030] Furthermore, in the high-voltage box provided in the present application, the high-voltage box further includes a fourth maintenance switch;

[0031] The fourth terminal of the third maintenance switch is electrically connected to the negative power supply electrode through the fourth maintenance switch; or / and,

[0032] The high-voltage box further includes a shunt, one end of the shunt is electrically connected to the second battery interface, and the other end of the shunt is electrically connected to the first terminal of the third maintenance switch.

[0033] Furthermore, in the high-voltage box provided in this application, the high-voltage box body includes:

[0034] Lower cover;

[0035] Four side panels, wherein the four side panels are integrally formed with the lower cover plate;

[0036] The upper cover plate is detachably fixedly connected to at least one of the side plates.

[0037] The high-voltage box provided in the present application includes a high-voltage box body, a first maintenance switch, a first battery interface, a first power interface and a power supply interface. The first battery interface, the first power interface and the power supply interface are arranged on the high-voltage box body. The power supply interface includes a positive power supply electrode and a negative power supply electrode. The first battery interface is electrically connected to the first terminal of the first maintenance switch, the first power interface is electrically connected to the second terminal of the first maintenance switch, the positive power supply electrode is electrically connected to the third terminal of the first maintenance switch, and the negative power supply electrode is electrically connected to the fourth terminal of the first maintenance switch, thereby replacing the larger isolating switch or relay in the high-voltage box with a smaller maintenance switch, thereby reducing the size of the high-voltage box and greatly reducing the manufacturing cost of the high-voltage box. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0039] Figure 1 A first schematic block diagram of a high-voltage box provided in an embodiment of the present application;

[0040] Figure 2A second schematic block diagram of a high-voltage box provided in an embodiment of the present application;

[0041] Figure 3 A third schematic block diagram of a high-voltage box provided in an embodiment of the present application;

[0042] Figure 4 A fourth schematic block diagram of a high-voltage box provided in an embodiment of the present application;

[0043] Figure 5 A schematic diagram of the structure of the high-voltage box provided in an embodiment of the present application;

[0044] Figure 6 This is a schematic diagram of the circuit connection of the high-voltage box provided in an embodiment of the present application. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] It should be understood that the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0047] It should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" that may be mentioned in the description of this application indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0048] As analyzed in the above background technology, the existing high-voltage box has the technical problem of being large in size and high in cost. To solve this technical problem, the present application provides a high-voltage box 10.

[0049] See also Figure 1 and Figure 6 , Figure 1A first schematic block diagram of a high-voltage box 10 provided in an embodiment of the present application; Figure 6 This is a schematic diagram of the circuit connection of the high-voltage box provided in an embodiment of the present application.

[0050] like Figure 1 and Figure 6 As shown, a high-voltage box 10 includes:

[0051] High-voltage box body;

[0052] First maintenance switch 101;

[0053] A first battery interface 201 is provided on the high-voltage box body and is electrically connected to the first terminal 1 of the first maintenance switch 101;

[0054] A first power interface 301 is provided on the high-voltage box body and is electrically connected to the second terminal 2 of the first maintenance switch 101;

[0055] The power supply interface 400 includes a positive power supply electrode 401 and a negative power supply electrode 402. The positive power supply electrode 401 and the negative power supply electrode 402 are arranged on the high-voltage box body. The positive power supply electrode 401 is electrically connected to the third terminal 3 of the first maintenance switch 101, and the negative power supply electrode 402 is electrically connected to the fourth terminal 4 of the first maintenance switch 101.

[0056] A Manual Service Disconnect (MSD) is a manual disconnect device used in the high-voltage system of new energy electric vehicles. Its primary function is to disconnect the high-voltage system by unplugging or operating the switch, thereby achieving electrical isolation and ensuring the safety of maintenance personnel. A service switch typically consists of a plug, a socket, and a seal.

[0057] The first battery interface 201 can function as a battery positive terminal interface B+, electrically connected to the battery's positive terminal; the first power interface 301 can function as a power positive terminal interface P+; and the power supply interface 400 can function as a battery low-voltage discharge interface, providing a 24V DC voltage. The first battery interface 201, the first power interface 301, and the power supply interface 400 all meet IP65 protection standards, ensuring that the entire high-voltage box 10 meets IP65 protection standards.

[0058] The high-voltage box 10 provided in the present application includes a high-voltage box body, a first maintenance switch 101, a first battery interface 201, a first power interface 301 and a power supply interface 400. The first battery interface 201, the first power interface 301 and the power supply interface 400 are arranged on the high-voltage box body. The power supply interface 400 includes a positive power supply electrode 401 and a negative power supply electrode 402. The first battery interface 201 is electrically connected to the first terminal 1 of the first maintenance switch 101, the first power interface 301 is electrically connected to the second terminal 2 of the first maintenance switch 101, the positive power supply electrode 401 is electrically connected to the third terminal 3 of the first maintenance switch 101, and the negative power supply electrode 402 is electrically connected to the fourth terminal 4 of the first maintenance switch 101, thereby replacing the larger isolating switch or relay in the high-voltage box 10 with a smaller maintenance switch, thereby reducing the size of the high-voltage box 10 and greatly reducing the manufacturing cost of the high-voltage box 10.

[0059] In some embodiments, the first maintenance switch 101 includes a plug and a socket; wherein the first terminal 1 and the third terminal 3 of the first maintenance switch 101 are provided on the plug, and the second terminal 2 and the fourth terminal 4 of the first maintenance switch 101 are provided on the socket.

[0060] A maintenance switch typically consists of a plug, a socket, and a seal. The socket incorporates a copper contact busbar and an interlocking mechanism. The contact busbar provides electrical conductivity, while the interlocking mechanism prevents accidental connection when disconnecting the circuit. The contact busbar needs to maintain good electrical conductivity, so it is typically plated with silver or tin to prevent oxidation and improve conductivity. The socket design also incorporates a high-voltage interlocking feature to prevent accidental operation during plugging and unplugging.

[0061] The plug includes a fuse or copper busbar and an interlocking device. The fuse provides overcurrent protection, automatically shutting off the power supply when the current exceeds a set value, thereby protecting the system from damage. The copper busbar also serves as a conductor and mates with the copper busbar in the socket, ensuring a good electrical connection. The plug's high-voltage interlocking terminals ensure that the high-voltage terminals are connected first, followed by the interlocking terminals, and vice versa, during insertion and removal, thus preventing arcing.

[0062] The primary function of seals is to prevent fluids and solid particles from leaking between adjacent mating surfaces and to prevent external impurities such as dust and moisture from invading the interior of equipment. In service switches, seals are typically located at the connection between the plug and socket to ensure safe and reliable operation in high-pressure environments. Seals should be stored below 30°C to maintain stable performance.

[0063] In some embodiments, the high-voltage box body is provided with a cavity, and the socket and the plug are provided in the cavity.

[0064] Specifically, the maintenance switch mentioned in this application is arranged in the inner cavity of the high-voltage box body, and is electrically connected to the battery interface, power interface and power supply interface 400 on the high-voltage box 10 respectively. Since the maintenance switch is smaller in size than the isolating switch or relay, the maintenance switch can be used to replace the isolating switch or relay in the high-voltage box 10, thereby greatly reducing the size of the high-voltage box 10 and achieving the purpose of reducing the cost of manufacturing the high-voltage box 10.

[0065] In some embodiments, as Figure 2 As shown, the high-voltage box 10 further includes a second maintenance switch 102 ; wherein the fourth terminal 4 of the first maintenance switch 101 is electrically connected to the negative power supply electrode 402 through the second maintenance switch 102 .

[0066] In this embodiment, the second maintenance switch 102 is provided between the first maintenance switch 101 and the power supply interface 400 , so that when the main circuit of the high-voltage box 10 needs to be cut off, the second maintenance switch 102 can be used to cut off the main circuit of the high-voltage box 10 .

[0067] Furthermore, in some embodiments, Figure 5 As shown, the second maintenance switch 102 is provided on the high-voltage box body. Specifically, the second maintenance switch 102 can be provided on the high-voltage box body so that the second maintenance switch 102 is provided on the panel of the high-voltage box 10, thereby ensuring that the main circuit of the high-voltage box 10 can be manually cut off.

[0068] In some embodiments, as Figure 6 As shown, the high-voltage box 10 further includes a first contactor, one end of the first contactor is electrically connected to the first battery interface 201 , and the other end of the first contactor is electrically connected to the first terminal 1 of the first maintenance switch 101 .

[0069] In this embodiment, the first contactor can serve as the main positive contactor KM1, which can be located between the positive terminal of the battery and the positive terminal of the power supply and controls the connection and disconnection of the main circuit of the high-voltage box 10. This can avoid a reduction in the safety performance of the high-voltage box 10 after the isolation switch or relay in the high-voltage box 10 is replaced with a maintenance switch. The main positive contactor KM1 is capable of handling high currents, typically rated at 150 to 250 amperes continuous, to ensure that the heavy-duty contacts can safely control large currents.

[0070] In some embodiments, as Figure 6 As shown, the high-voltage box 10 further includes a fuse, one end of the fuse is electrically connected to the first battery interface 201 , and the other end of the fuse is electrically connected to the first terminal 1 of the first maintenance switch 101 .

[0071] In this embodiment, the fuse can be a main positive fuse, FU1, located between the positive terminal of the battery and the positive terminal of the power supply. The main positive fuse FU1 in the high-voltage box 10 primarily protects the circuit from damage caused by overload or short-circuit currents. Its operating principle is based on the thermal effect of current. When the current passing through the fuse exceeds its rated value, the temperature of the internal metal conductor rises rapidly. Once it reaches a certain temperature, it begins to melt, creating a circuit break, thereby interrupting the high current.

[0072] The basic structure of a fuse consists of an element, a housing, and a support. The element is the key component controlling its fusing characteristics and is typically made of low-melting-point materials such as lead and lead alloys, or high-melting-point materials such as copper and silver. The element remains solid during normal circuit operation. However, when an overload or short circuit occurs, the current exceeds its melting point, causing it to melt and vaporize, creating a break, thereby protecting the circuit.

[0073] Furthermore, the main positive fuse FU1 must be designed with both interrupting capacity and protective fusing characteristics in mind to ensure it can effectively interrupt fault currents under various operating conditions. For example, in high-voltage systems, the fuse's operating time must meet specific requirements to prevent overvoltage and other issues.

[0074] In addition, the main circuit copper bar of the high-voltage box 10 is 25*3mm 2 The contact copper bar for the main positive fuse FU1 is 3*30mm 2 Copper busbar can increase the heat dissipation area.

[0075] In some embodiments, as Figure 6 As shown, the high-voltage box 10 further includes a Hall sensor H, one end of the Hall sensor H is electrically connected to the first battery interface 201 , and the other end of the Hall sensor H is electrically connected to the first terminal 1 of the first maintenance switch 101 .

[0076] Hall effect sensors (H) use the Hall effect to measure the strength of a magnetic field. When a conductor moves in a magnetic field perpendicular to the direction of the current, an electromotive force (Hall voltage) is generated on the conductor's side. This voltage is proportional to the strength of the magnetic field. Therefore, by measuring the Hall voltage, the presence of a magnetic field and its changes can be accurately detected.

[0077] In the high-voltage box 10, Hall effect sensors H are often used to measure current and voltage. For example, certain high-performance Hall effect current sensors, such as the CC6920B, integrate a high-precision, low-noise linear Hall circuit and a low-impedance main current conductor. They can provide a measurement range of up to 50A and feature high bandwidth and fast response.

[0078] In some embodiments, as Figure 6As shown, the high-voltage box 10 further includes a battery collection interface HV, which is provided on the high-voltage box body and electrically connected to the first terminal 1 of the first maintenance switch 101 and the first battery interface 201 .

[0079] In this embodiment, the battery acquisition interface HV includes a battery management unit interface 501, a battery communication interface 503, a battery debugging interface 504 and a battery cluster management unit interface 502. The battery management unit interface 501, the battery communication interface 503, the battery debugging interface 504 and the battery cluster management unit interface 502 are all arranged on the high-voltage box body, specifically, they can be arranged on the panel of the high-voltage box 10.

[0080] In some embodiments, as Figure 6 As shown, the high-voltage box 10 further includes an indicator light, which is electrically connected to the positive power supply electrode 401 and the negative power supply electrode 402 respectively, and is provided on the high-voltage box body.

[0081] In this embodiment, the indicator lights include an operation indicator light 601 and a fault indicator light 602. Figure 6 Indicated as HL1 and HL2 respectively, the operation indicator light 601 and the fault indicator light 602 are both arranged on the panel of the high-voltage box 10, and then when the high-voltage box 10 is working, it can be determined whether there is a fault in the high-voltage box 10 by the operation indicator light 601 and the fault indicator light 602.

[0082] In some embodiments, as Figure 6 As shown, the high-voltage box 10 also includes:

[0083] A pre-charging resistor R1, one end of which is electrically connected to the first battery interface 201 and one end of the first contactor;

[0084] The second contactor KM3 has one end electrically connected to the other end of the pre-charging resistor R1 , and the other end electrically connected to the fourth terminal 4 of the second maintenance switch 102 and the other end of the first contactor.

[0085] In this embodiment, a pre-charging circuit is also provided in the high-voltage box 10, which includes a pre-charging resistor R1 and a second contactor KM3. After the pre-charging resistor R1 is connected in series with the second contactor KM3, it can be connected in parallel with the first contactor. Then, when the main circuit of the high-voltage box 10 is closed, the second contactor KM3 can be closed first for pre-charging, and then the first contactor is closed and the second contactor KM3 is disconnected, so that the main circuit of the high-voltage box 10 can be turned on.

[0086] The second contactor KM3 may be a circulating current contactor, which is a device used to control the current between battery clusters in a battery energy storage system. Its main function is to prevent the circulating current phenomenon caused by excessive voltage difference.

[0087] In some embodiments, as Figure 3 As shown, the high-voltage box 10 also includes:

[0088] A third maintenance switch 103;

[0089] The second battery interface 202 is provided on the high-voltage box body and is electrically connected to the first terminal 1 of the third maintenance switch 103;

[0090] A second power interface 302 is provided on the high-voltage box body and is electrically connected to the second terminal 2 of the third maintenance switch 103;

[0091] The positive power supply electrode 401 is electrically connected to the third terminal 3 of the third maintenance switch 103 , and the negative power supply electrode 402 is electrically connected to the fourth terminal 4 of the third maintenance switch 103 .

[0092] In this embodiment, the third maintenance switch 103 is located between the second battery interface 202 and the second power interface 302. The second battery interface 202 can function as the negative battery interface B-, electrically connected to the positive battery terminal; the second power interface 302 can function as the negative power interface P-; and the power interface 400 can function as a low-voltage battery discharge interface, providing 24V. Both the second battery interface 202 and the power interface 302 meet the IP65 protection rating, and thus the entire high-voltage box 10 meets the IP65 protection rating.

[0093] Furthermore, in some embodiments, Figure 4 As shown, the high-voltage box 10 further includes a fourth maintenance switch 104 ; wherein the fourth terminal 4 of the third maintenance switch 103 is electrically connected to the negative power supply electrode 402 through the fourth maintenance switch 104 .

[0094] In this embodiment, the fourth maintenance switch 104 is arranged between the third maintenance switch 103 and the power supply interface 400, which can further improve the safety performance of the high-voltage box 10, and when the main circuit of the high-voltage box 10 needs to be cut off, the main circuit of the high-voltage box 10 can be cut off through the second maintenance switch 102.

[0095] In some embodiments, as Figure 6 As shown, the high-voltage box 10 further includes a shunt SH1 , one end of the shunt SH1 is electrically connected to the second battery interface 202 , and the other end of the shunt SH1 is electrically connected to the first terminal 1 of the third maintenance switch 103 .

[0096] In this embodiment, the shunt SH1 can serve as a key component in the high-voltage box 10, used to measure and protect the charge and discharge currents of the battery cluster. Specifically, the shunt SH1 can perform current measurement, overcurrent protection, and data aggregation in the high-voltage box 10. Among them, current measurement is to accurately measure the charge and discharge currents of the battery cluster through the shunt SH1, which is crucial for the stable operation of the system; overcurrent protection can trigger the protection mechanism of the shunt SH1 in time when abnormal current is detected, preventing the battery cluster from being damaged by overcurrent; data aggregation specifically cooperates with the main control unit, and the shunt SH1 feeds back the collected data to the main control unit for further processing and decision-making.

[0097] In some embodiments, as Figure 6 As shown, the high-voltage box 10 further includes a main negative fuse FU2 and a main negative contactor KM2 , wherein the main negative fuse FU2 and the main negative contactor KM2 are connected in series and then connected in series between the second battery interface 202 and the third maintenance switch 103 .

[0098] Furthermore, in some embodiments, Figure 5 As shown, the high-voltage box body includes:

[0099] Lower cover;

[0100] Four side panels, the four side panels and the lower cover are integrally formed;

[0101] The upper cover plate is detachably fixedly connected to at least one side plate.

[0102] In this embodiment, the four side panels include a front side panel, a rear side panel, a left side panel and a right side panel. The front side panel, the rear side panel, the left side panel and the right side panel are all formed as one piece with the lower cover panel by sheet metal welding. At the same time, the front side panel, the rear side panel, the left side panel and the right side panel are all detachably fixed to the upper cover panel by screws. At the same time, sealing gaskets are also provided between the front side panel, the rear side panel, the left side panel and the right side panel and the upper cover panel.

[0103] Among them, the first battery interface 201, the second battery interface 202, the first power interface 301, the second power interface 302, the power supply interface 400, the battery management unit interface 501, the battery communication interface 503, the battery debugging interface 504, the battery cluster management unit interface 502, the operation indicator light 601 and the fault indicator light 602 are all arranged on the front cover.

[0104] The following describes the power-on and power-off processes of the high-voltage box 10 provided in this application.

[0105] Power-on process:

[0106] Connect the wiring harnesses in the high-voltage box 10 and install four maintenance switches, namely MSD1, MSD2, MSD3 and MSD4;

[0107] The battery cluster management unit performs self-test;

[0108] If the self-test shows a fault, the power-on fails;

[0109] If the self-test shows no fault, first close the main negative contactor KM2 and the secondary contactor KM3 for pre-charging;

[0110] After the pre-charge is completed, the main positive contactor KM1 is attracted;

[0111] If the operation indicator light 601 is on, it indicates that the power is successfully turned on;

[0112] If the operation indicator light 601 is off, it indicates that the power-on has failed.

[0113] Power-off process:

[0114] The battery cluster management unit receives the power-off command and disconnects all closed contactors;

[0115] If the battery cluster management unit detects that there is voltage, it will display power-off failure;

[0116] If the battery cluster management unit detects that there is no voltage, the fault indicator light 602 will light up;

[0117] Pull out the two maintenance switches on the front side panel, and the high-voltage box 10 is now powered off successfully.

[0118] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A high-voltage box, characterized in that: include: High-voltage box body; First maintenance switch; a first battery interface, provided on the high-voltage box body, the first battery interface being electrically connected to a first terminal of the first maintenance switch; a first power interface, provided on the high-voltage box body, the first power interface being electrically connected to the second terminal of the first maintenance switch; The power supply interface includes a positive power supply electrode and a negative power supply electrode. The positive power supply electrode and the negative power supply electrode are arranged on the high-voltage box body. The positive power supply electrode is electrically connected to the third terminal of the first maintenance switch, and the negative power supply electrode is electrically connected to the fourth terminal of the first maintenance switch.

2. The high-voltage box according to claim 1, characterized in that: The first maintenance switch includes a plug and a socket; The first terminal and the third terminal of the first maintenance switch are arranged on the plug, and the second terminal and the fourth terminal of the first maintenance switch are arranged on the socket.

3. The high-voltage box according to claim 2, characterized in that: The high-voltage box body is provided with a cavity, and the socket and the plug are arranged in the cavity.

4. The high-voltage box according to claim 1, characterized in that The high-voltage box also includes a second maintenance switch; The fourth terminal of the first maintenance switch is electrically connected to the negative power supply electrode through the second maintenance switch.

5. The high-voltage box according to claim 4, characterized in that: The second maintenance switch is arranged on the high-voltage box body.

6. The high-voltage box according to claim 1, characterized in that: The high-voltage box further includes a first contactor, one end of the first contactor is electrically connected to the first battery interface, and the other end of the first contactor is electrically connected to the first terminal of the first maintenance switch; or / and, The high-voltage box further includes a fuse, one end of the fuse is electrically connected to the first battery interface, and the other end of the fuse is electrically connected to the first terminal of the first maintenance switch; or / and, The high-voltage box further includes a Hall sensor, one end of which is electrically connected to the first battery interface, and the other end of which is electrically connected to the first terminal of the first maintenance switch; or / and, The high-voltage box further includes a battery collection interface, which is provided on the high-voltage box body and electrically connected to the first terminal of the first maintenance switch and the first battery interface respectively; or / and, The high-voltage box further includes an indicator light, which is electrically connected to the positive power supply electrode and the negative power supply electrode, respectively, and is arranged on the high-voltage box body.

7. The high-voltage box according to claim 6, characterized in that: The high-voltage box also includes: a pre-charging resistor, one end of which is electrically connected to the first battery interface and one end of the first contactor; A second contactor, one end of the second contactor is electrically connected to the other end of the pre-charging resistor, and the other end of the second contactor is electrically connected to the fourth terminal of the second maintenance switch and the other end of the first contactor respectively.

8. The high-voltage box according to claim 1, characterized in that: The high-voltage box also includes: Third maintenance switch; a second battery interface, provided on the high-voltage box body, the second battery interface being electrically connected to the first terminal of the third maintenance switch; a second power interface, provided on the high-voltage box body, the second power interface being electrically connected to the second terminal of the third maintenance switch; The positive power supply electrode is electrically connected to the third terminal of the third maintenance switch, and the negative power supply electrode is electrically connected to the fourth terminal of the third maintenance switch.

9. The high-voltage box according to claim 8, characterized in that: The high-voltage box also includes a fourth maintenance switch; Wherein, the fourth terminal of the third maintenance switch is electrically connected to the negative power supply electrode through the fourth maintenance switch; or / and, The high-voltage box further includes a shunt, one end of which is electrically connected to the second battery interface, and the other end of which is electrically connected to the first terminal of the third maintenance switch.

10. The high-voltage box according to any one of claims 1 to 9, characterized in that: The high-voltage box body includes: Lower cover; Four side panels, wherein the four side panels are integrally formed with the lower cover plate; The upper cover plate is detachably fixedly connected to at least one of the side plates.

Images