A disconnector, a high-voltage tank and an energy storage system

Abstract

The embodiment of the utility model provides a kind of isolator, high pressure box and energy storage system, it is related to electrical technology field.Isolator includes isolator body, wiring end, pre-charge circuit contactor and resistance, wiring end includes positive pole incoming line end, negative pole incoming line end, positive pole outgoing line end and negative pole outgoing line end, positive pole incoming line end, negative pole incoming line end, positive pole outgoing line end and negative pole outgoing line end are all set in isolator body, and isolator body is used to connect or cut off the circuit between positive pole incoming line end and positive pole outgoing line end, and the circuit between negative pole incoming line end and negative pole outgoing line end;Pre-charge circuit contactor and resistance are all set in isolator body, pre-charge circuit contactor is connected in series with resistance, and is connected in parallel on the circuit between positive pole incoming line end and positive pole outgoing line end, or on the circuit between negative pole incoming line end and negative pole outgoing line end.It can reduce overall volume, and reduce manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, and more specifically, to a disconnecting switch, a high-voltage box, and an energy storage system. Background Technology

[0002] New energy systems, as a crucial development direction in the current power sector, are receiving increasing attention. Photovoltaic power generation systems directly convert solar radiation into electrical energy through solar panels, thus achieving power generation. Energy storage systems, on the other hand, store the temporarily unused electrical energy generated by photovoltaic power generation systems, enabling time-shifted energy regulation and efficient utilization. As a key component of the new energy industry, energy storage systems play a vital role in improving grid stability and optimizing energy allocation.

[0003] The high-voltage box is one of the core components of an energy storage system. It is an independent device on the DC side, and its main function is to provide electrical protection before the battery outputs electrical energy, ensuring the safety and reliability of the system operation. However, in the existing technology, the high-voltage box has a large number of internal components and a complex circuit connection structure, resulting in a large overall size and high manufacturing cost, which affects its economic efficiency and deployability in practical applications. Utility Model Content

[0004] The purpose of this invention is to provide a disconnecting switch, a high-voltage box, and an energy storage system that can reduce the overall size and manufacturing cost.

[0005] The embodiments of this utility model are implemented as follows: In a first aspect, this utility model provides an isolating switch, comprising: The disconnector switch body; The connection terminal includes a positive input terminal, a negative input terminal, a positive output terminal, and a negative output terminal. The positive input terminal, the negative input terminal, the positive output terminal, and the negative output terminal are all disposed on the disconnecting switch body. The disconnecting switch body is used to connect or disconnect the circuit between the positive input terminal and the positive output terminal, as well as the circuit between the negative input terminal and the negative output terminal. The pre-charge circuit contactor and the resistor are both disposed on the disconnect switch body. The pre-charge circuit contactor and the resistor are connected in series and in parallel in the circuit between the positive terminal input and the positive terminal output, or in parallel in the circuit between the negative terminal input and the negative terminal output.

[0006] In an optional embodiment, the positive terminal, the negative terminal, the positive terminal, and the negative terminal are all located on one side of the disconnecting switch body, and the pre-charge circuit contactor and the resistor are located on the opposite side of the disconnecting switch body.

[0007] In an optional embodiment, the positive terminal, the negative terminal, the positive terminal, and the negative terminal are all located on the rear side of the disconnecting switch body, and the pre-charge circuit contactor and the resistor are all located on the upper side of the disconnecting switch body near the front side.

[0008] In an optional embodiment, the precharge circuit contactor is detachably mounted on the disconnector body; and / or, The resistor is detachably mounted on the disconnect switch body.

[0009] In an optional embodiment, the disconnect switch body includes a housing, an operating mechanism, and a contact structure. The operating mechanism, the contact structure, the positive terminal inlet, the negative terminal inlet, the positive terminal outlet, the negative terminal outlet, the pre-charge circuit contactor, and the resistor are all disposed in the housing. The operating mechanism is connected to the contact structure and is used to drive the contact structure to move, so as to connect or disconnect the circuit between the positive terminal and the positive terminal, and the circuit between the negative terminal and the negative terminal.

[0010] In an optional embodiment, the housing is provided with a face shield located on the front side of the housing, and the precharge circuit contactor and the resistor are both located on the upper side of the face shield.

[0011] In an optional embodiment, the contact structure includes a first moving contact, a second moving contact, a first positive stationary contact, a first negative stationary contact, a second positive stationary contact, and a second negative stationary contact. Both the first moving contact and the second moving contact are connected to the operating mechanism. The first positive stationary contact is connected to the positive input terminal, the first negative stationary contact is connected to the negative input terminal, the second positive stationary contact is connected to the positive output terminal, and the second negative stationary contact is connected to the negative output terminal. The first moving contact is electrically connected to the second positive stationary contact, and the second moving contact is electrically connected to the second negative stationary contact. The operating mechanism is used to drive the first moving contact and the second moving contact to move, so that the first moving contact contacts the first positive stationary contact and the second moving contact contacts the first negative stationary contact; or, to separate the first moving contact from the first positive stationary contact and the second moving contact from the first negative stationary contact.

[0012] In an optional embodiment, the first positive stationary contact is integrally formed with the positive input terminal; and / or, The first negative stationary contact is integrally formed with the negative input terminal; and / or... The second positive stationary contact is integrally formed with the positive terminal outlet; and / or, The second negative stationary contact is integrally formed with the negative output terminal.

[0013] In an optional embodiment, the disconnecting switch body further includes an arc-extinguishing chamber disposed within the housing, wherein the pre-charge circuit contactor and the resistor are both located on the front side of the arc-extinguishing chamber.

[0014] Secondly, this utility model provides a high-voltage box, including a box body and a disconnecting switch as described in any of the foregoing embodiments, wherein the disconnecting switch is disposed in the box body.

[0015] In an optional embodiment, the high-voltage box further includes a first fuse and a second fuse, wherein the first fuse is connected to the positive terminal and the second fuse is connected to the negative terminal; or, the first fuse is connected to the positive terminal and the second fuse is connected to the negative terminal.

[0016] Thirdly, this utility model provides an energy storage system, including the high-voltage box described in the foregoing embodiments.

[0017] The beneficial effects of this utility model embodiment include: The disconnecting switch includes a disconnecting switch body, terminals, a pre-charge circuit contactor, and a resistor. The terminals include a positive input terminal, a negative input terminal, a positive output terminal, and a negative output terminal. The positive input terminal, negative input terminal, positive output terminal, and negative output terminal are all located on the disconnecting switch body. The disconnecting switch body is used to connect or disconnect the circuit between the positive input terminal and the positive output terminal, as well as the circuit between the negative input terminal and the negative output terminal. The pre-charge circuit contactor and the resistor are both located on the disconnecting switch body. The pre-charge circuit contactor and the resistor are connected in series and in parallel in the circuit between the positive input terminal and the positive output terminal, or in parallel in the circuit between the negative input terminal and the negative output terminal.

[0018] As is easily understood, by directly controlling the connection and disconnection of the positive and negative circuits through the isolating switch body, the switching functions of existing isolating switches and contactors can be integrated into a single switching structure for circuit control. This reduces the number of components inside the high-voltage box and lowers manufacturing costs. Furthermore, by integrating the pre-charge circuit contactor and resistor onto the isolating switch body, connecting them in series first and then in parallel to the positive or negative circuit, the components inside the high-voltage box are compactly installed, simplifying circuit connections and reducing the overall size of the high-voltage box, thus also lowering manufacturing costs.

[0019] The high-voltage box includes a disconnecting switch body and has all the beneficial effects of that disconnecting switch body.

[0020] The energy storage system includes a high-voltage box, which has all the beneficial effects of the high-voltage box. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A simplified structural diagram of the energy storage system provided in this embodiment of the utility model; Figure 2 A simplified structural diagram of the high-pressure box provided in this embodiment of the utility model; Figure 3 This is a partial structural schematic diagram of the high-voltage box provided in an embodiment of the present utility model; Figure 4 A first-view structural schematic diagram of the disconnecting switch provided in an embodiment of this utility model; Figure 5 A second-view structural schematic diagram of the disconnecting switch provided in an embodiment of this utility model; Figure 6 A schematic diagram of the connection between the precharge circuit contactor and the resistor provided in this embodiment of the utility model; Figure 7 A cross-sectional view of the disconnecting switch provided in an embodiment of this utility model.

[0023] Icons: 1000 - Energy storage system; 1100 - High voltage box; 100 - Disconnecting switch; 10 - Disconnecting switch body; 11 - Housing; 111 - Faceplate; 12 - Operating mechanism; 13 - Contact structure; 131 - First moving contact; 133 - First positive stationary contact; 135 - Second positive stationary contact; 14 - Arc extinguishing chamber; 20 - Terminal; 21 - Positive inlet terminal; 22 - Negative inlet terminal; 23 - Positive outlet terminal; 24 - Negative outlet terminal; 30 - Pre-charge circuit contactor; 40 - Resistor; 200 - Box; 300 - First fuse; 400 - Second fuse; 1200 - Battery pack; 1300 - Battery combiner cabinet; 1400 - Energy storage converter; 1500 - Low voltage switchgear. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] As described in the background section, the high-voltage box is one of the core components of an energy storage system. Its main function is to provide electrical protection before the battery outputs electrical energy, ensuring the safety and reliability of the system operation.

[0031] However, in existing technologies, the high-voltage box contains a large number of components and has a complex circuit connection structure. Specifically, it first separates positive and negative circuits through a disconnecting switch, connecting a contactor and a fuse respectively. In one of the circuits, a pre-charge circuit contactor and a resistor are connected in parallel, resulting in a large overall size and high manufacturing cost, which affects its economic efficiency and deployability in practical applications.

[0032] Based on this, please refer to Figures 1-7 The present invention provides an isolating switch 100, a high-voltage box 1100 and an energy storage system 1000, which can effectively improve the technical problems mentioned above, that is, it can reduce the overall volume and reduce the manufacturing cost.

[0033] It should be noted that, Figures 1-7 The front, back, up, and down directions shown are those that are clearly known to those skilled in the art when the disconnecting switch 100, high-voltage box 1100, and energy storage system 1000 are conventionally placed. The disconnecting switch 100, high-voltage box 1100, and energy storage system 1000 will be described in detail below.

[0034] Please refer to Figure 1 , Figure 1 This is a simplified structural diagram of the energy storage system 1000 provided in this embodiment, combined with... Figure 1The energy storage system 1000 includes a battery pack 1200, a high-voltage box 1100, a battery combiner cabinet 1300, an energy storage converter 1400, and a transformer substation low-voltage cabinet 1500 connected in sequence. Electrical energy is stored in the battery pack 1200. When power generation is needed, the direct current (DC) from the battery pack 1200 flows sequentially through the high-voltage box 1100 and the battery combiner cabinet 1300 to the energy storage converter 1400. The energy storage converter 1400 converts the DC power into alternating current (AC), which is then transmitted to the transformer substation low-voltage cabinet 1500 for power generation.

[0035] Please refer to Figure 2 and Figure 3 , Figure 2 This is a simplified structural diagram of the high-voltage box 1100 provided in this embodiment. Figure 3 This is a partial structural schematic diagram of the high-voltage box 1100 provided in this embodiment. (In conjunction with...) Figure 2 and Figure 3 The high-voltage box 1100 includes a box body 200 and a disconnect switch 100. The disconnect switch 100 is located inside the box body 200 and can control the connection and disconnection of the circuit between the battery pack 1200 and the battery combiner cabinet 1300.

[0036] For details, please refer to Figure 4 and Figure 5 , Figure 4 This is a first-view structural schematic diagram of the disconnector switch 100 provided in this embodiment. Figure 5 This is a structural schematic diagram of the disconnector switch 100 provided in this embodiment from a second perspective. (Combined with...) Figure 4 and Figure 5 The disconnector switch 100 includes a disconnector switch body 10, terminals 20, a pre-charge circuit contactor 30, and a resistor 40. Terminal 20 includes a positive input terminal 21, a negative input terminal 22, a positive output terminal 23, and a negative output terminal 24. These terminals are all located on the disconnector switch body 10, and the disconnector switch body 10 is used to connect or disconnect the circuit between the positive input terminal 21 and the positive output terminal 23, as well as the circuit between the negative input terminal 22 and the negative output terminal 24.

[0037] Further, please refer to Figure 6 , Figure 6 This is a schematic diagram showing the connection between the precharge circuit contactor 30 and the resistor 40 provided in this embodiment, in conjunction with... Figures 4-6 The precharge circuit contactor 30 and the resistor 40 are both located on the disconnect switch body 10. The precharge circuit contactor 30 and the resistor 40 are connected in series and in parallel in the circuit between the positive terminal 21 and the positive terminal 23, or in parallel in the circuit between the negative terminal 22 and the negative terminal 24.

[0038] As is easily understood, by directly controlling the connection and disconnection of the positive and negative circuits through the isolating switch body 10, the switching functions of existing isolating switches and contactors can be integrated into a single switching structure for circuit control. This reduces the number of components inside the high-voltage box 1100 and lowers manufacturing costs. Furthermore, by integrating the pre-charge circuit contactor 30 and resistor 40 onto the isolating switch body 10, connecting them in series first and then in parallel to the positive or negative circuit, the components inside the high-voltage box 1100 are compactly installed, simplifying circuit connections and reducing the overall size of the high-voltage box 1100, thus also lowering manufacturing costs.

[0039] It should be noted that by connecting a resistor 40 in series in the pre-charge circuit of the pre-charge circuit contactor 30, the current can be limited, preventing the main relay contacts from burning or sticking due to overcurrent. Furthermore, in actual operation of the isolating switch 100, the circuit connection sequence is as follows: first connect the pre-charge circuit, then connect the main circuit; that is, first close the switch of the pre-charge circuit contactor 30, and then, through the isolating switch body 10, connect the positive circuit between the positive input terminal 21 and the positive output terminal 23, and connect the negative circuit between the negative input terminal 22 and the negative output terminal 24.

[0040] Combination Figure 1 and Figure 4 Specifically, in this embodiment, the positive electrode inlet 21 and the negative electrode inlet 22 are connected to the battery pack 1200, and the positive electrode outlet 23 and the negative electrode outlet 24 are connected to the battery combiner cabinet 1300.

[0041] Furthermore, please combine Figure 2 and Figure 3 The high-voltage box 1100 also includes a first fuse 300 and a second fuse 400, both of which are connected to the disconnect switch 100. It is easy to understand that by setting the first fuse 300 and the second fuse 400, short-circuit protection and overload protection can be achieved.

[0042] Specifically, in this embodiment, the first fuse 300 is connected to the positive terminal 23, and the second fuse 400 is connected to the negative terminal 24. Of course, in other embodiments, the first fuse 300 may be connected to the positive terminal 21, and the second fuse 400 may be connected to the negative terminal 22.

[0043] Please continue to combine Figure 4 and Figure 5 The positive terminal 21, negative terminal 22, positive terminal 23, and negative terminal 24 are all located on one side of the disconnector body 10, while the pre-charge circuit contactor 30 and resistor 40 are located on the opposite side of the disconnector body 10.

[0044] In other words, the terminal 20, the precharge circuit contactor 30, and the resistor 40 are located on opposite sides of the disconnector body 10. This allows the terminal 20 to be easily connected to other components of the energy storage system 1000 without affecting the installation and use of the precharge circuit contactor 30 and the resistor 40.

[0045] Specifically, in this embodiment, the positive terminal 21, the negative terminal 22, the positive terminal 23, and the negative terminal 24 are all located on the rear side of the disconnector body 10, and the pre-charge circuit contactor 30 and the resistor 40 are all located on the upper side of the disconnector body 10 near the front.

[0046] It should be noted that the "upper side near the front" mentioned above specifically refers to the fact that the precharge circuit contactor 30 and the resistor 40 are both located on the upper side of the disconnector switch body 10, and are also located near the front side of the disconnector switch body 10.

[0047] Furthermore, in order to facilitate the installation and removal of the precharge circuit contactor 30 and the resistor 40, in this embodiment, the precharge circuit contactor 30 is detachably mounted on the disconnector switch body 10, and the resistor 40 is detachably mounted on the disconnector switch body 10.

[0048] Specifically, in this embodiment, the precharge circuit contactor 30 and the resistor 40 are both connected to the disconnect switch body 10 by bolts; of course, in other embodiments, the precharge circuit contactor 30 and the resistor 40 can also be detachably connected to the disconnect switch body 10 by means of snap-fit, riveting or magnetic connection.

[0049] Furthermore, in this embodiment, the precharge circuit contactor 30 and the resistor 40 are both located on the top of the disconnect switch body 10, thereby further facilitating installation and disassembly.

[0050] Please refer to Figure 7 , Figure 7 This is a cross-sectional view of the disconnector switch 100 provided in this embodiment, combined with... Figures 4-7 The disconnector switch body 10 includes a housing 11, an operating mechanism 12, and a contact structure 13. The operating mechanism 12, the contact structure 13, the positive input terminal 21, the negative input terminal 22, the positive output terminal 23, the negative output terminal 24, the pre-charge circuit contactor 30, and the resistor 40 are all disposed in the housing 11. The operating mechanism 12 is connected to the contact structure 13 and is used to drive the contact structure 13 to move, so as to connect or disconnect the circuit between the positive input terminal 21 and the positive output terminal 23, and the circuit between the negative input terminal 22 and the negative output terminal 24.

[0051] Specifically, in this embodiment, the housing 11 is provided with a face mask 111, which is located on the front side of the housing 11. The pre-charge circuit contactor 30 and the resistor 40 are both located on the upper side of the face mask 111.

[0052] Please continue to combine Figures 4-7 Specifically, the contact structure 13 includes a first moving contact 131, a second moving contact (not shown), a first positive stationary contact 133, a first negative stationary contact (not shown), a second positive stationary contact 135, and a second negative stationary contact (not shown). Both the first moving contact 131 and the second moving contact are connected to the operating mechanism 12. The first positive stationary contact 133 is connected to the positive input terminal 21, the first negative stationary contact is connected to the negative input terminal 22, the second positive stationary contact 135 is connected to the positive output terminal 23, and the second negative stationary contact is connected to the negative output terminal 24. The first moving contact 131 is electrically connected to the second positive stationary contact 135, and the second moving contact is electrically connected to the second negative stationary contact. The operating mechanism 12 is used to drive the first moving contact 131 and the second moving contact to move, so that the first moving contact 131 contacts the first positive stationary contact 133 and the second moving contact contacts the first negative stationary contact; or, to separate the first moving contact 131 from the first positive stationary contact 133 and the second moving contact from the first negative stationary contact.

[0053] like Figure 7 As shown, the operating mechanism 12 drives the first moving contact 131 to perform closing and opening operations. When closing, the first moving contact 131 contacts the first positive stationary contact 133; when opening, the first moving contact 131 separates from the first positive stationary contact 133. Similarly, the operating mechanism 12 can also simultaneously drive the second moving contact to perform closing and opening operations on the first negative stationary contact.

[0054] In order to extinguish the electric arc generated during the energized operation of the contact structure 13 during closing and opening, in this embodiment, the disconnector switch body 10 also includes an arc-extinguishing chamber 14, which is disposed inside the housing 11. Furthermore, the pre-charge circuit contactor 30 and the resistor 40 are both located on the front side of the arc-extinguishing chamber 14.

[0055] Furthermore, in this embodiment, the first positive stationary contact 133 is integrally formed with the positive inlet terminal 21, the first negative stationary contact is integrally formed with the negative inlet terminal 22, the second positive stationary contact 135 is integrally formed with the positive outlet terminal 23, and the second negative stationary contact is integrally formed with the negative outlet terminal 24.

[0056] It is easy to understand that by using an integrated molding design, the structural strength of the wiring structure can be improved, production costs can be reduced, and the number of parts inside the disconnect switch body 10 can be reduced, thereby reducing the size of the disconnect switch body 10 and further reducing manufacturing costs.

[0057] In summary, the embodiments of this utility model provide a disconnecting switch 100, a high-voltage box 1100, and an energy storage system 1000. The disconnecting switch 100 includes a disconnecting switch body 10, terminals 20, a pre-charge circuit contactor 30, and a resistor 40. The terminals 20 include a positive terminal 21, a negative terminal 22, a positive terminal 23, and a negative terminal 24. The positive terminal 21, negative terminal 22, positive terminal 23, and negative terminal 24 are all disposed on the disconnecting switch body. The isolating switch body 10 is used to connect or disconnect the circuit between the positive input terminal 21 and the positive output terminal 23, and the circuit between the negative input terminal 22 and the negative output terminal 24. The pre-charge circuit contactor 30 and resistor 40 are both located on the isolating switch body 10. The pre-charge circuit contactor 30 and resistor 40 are connected in series and in parallel in the circuit between the positive input terminal 21 and the positive output terminal 23, or in parallel in the circuit between the negative input terminal 22 and the negative output terminal 24. By directly controlling the connection and disconnection of the positive and negative circuits with the isolating switch body 10, the switching functions of existing isolating switches and contactors can be integrated into a single switching structure for circuit control, thereby reducing the number of internal components in the high-voltage box 1100 and lowering manufacturing costs. Furthermore, by integrating the pre-charge circuit contactor 30 and resistor 40 onto the disconnector switch body 10, and then connecting them in series before connecting them in parallel to the positive or negative circuit, the components inside the high-voltage box 1100 are compactly installed, simplifying the circuit connection, thereby reducing the overall size of the high-voltage box 1100 and lowering the manufacturing cost.

[0058] The high-voltage box 1100 includes a disconnecting switch body 10, which has all the beneficial effects of the disconnecting switch body 10.

[0059] The energy storage system 1000 includes a high-voltage box 1100, which has all the beneficial effects of the high-voltage box 1100.

[0060] The above description is merely a specific embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A disconnecting switch, characterized in that, include: Disconnecting switch body (10); The terminal block (20) includes a positive terminal (21), a negative terminal (22), a positive terminal (23), and a negative terminal (24). The positive terminal (21), the negative terminal (22), the positive terminal (23), and the negative terminal (24) are all located on the isolating switch body (10). The isolating switch body (10) is used to connect or disconnect the circuit between the positive terminal (21) and the positive terminal (23), as well as the circuit between the negative terminal (22) and the negative terminal (24). A precharge circuit contactor (30) and a resistor (40) are provided on the disconnect switch body (10). The precharge circuit contactor (30) and the resistor (40) are connected in series and in parallel on the circuit between the positive terminal (21) and the positive terminal (23), or in parallel on the circuit between the negative terminal (22) and the negative terminal (24).

2. The disconnecting switch according to claim 1, characterized in that, The positive terminal (21), the negative terminal (22), the positive terminal (23), and the negative terminal (24) are all located on one side of the disconnecting switch body (10), and the pre-charge circuit contactor (30) and the resistor (40) are all located on the opposite side of the disconnecting switch body (10).

3. The disconnecting switch according to claim 2, characterized in that, The positive terminal (21), the negative terminal (22), the positive terminal (23), and the negative terminal (24) are all located on the rear side of the disconnecting switch body (10), and the pre-charge circuit contactor (30) and the resistor (40) are all located on the upper side of the disconnecting switch body (10) near the front.

4. The disconnecting switch according to claim 1, characterized in that, The precharge circuit contactor (30) is detachably mounted on the disconnector body (10); and / or, The resistor (40) is detachably mounted on the disconnector switch body (10).

5. The disconnecting switch according to any one of claims 1-4, characterized in that, The disconnect switch body (10) includes a housing (11), an operating mechanism (12), and a contact structure (13). The operating mechanism (12), the contact structure (13), the positive terminal (21), the negative terminal (22), the positive terminal (23), the negative terminal (24), the pre-charge circuit contactor (30), and the resistor (40) are all disposed in the housing (11). The operating mechanism (12) is connected to the contact structure (13) and is used to drive the contact structure (13) to move in order to connect or disconnect the circuit between the positive terminal (21) and the positive terminal (23), as well as the circuit between the negative terminal (22) and the negative terminal (24).

6. The disconnecting switch according to claim 5, characterized in that, The housing (11) is provided with a mask (111), which is located on the front side of the housing (11). The precharge circuit contactor (30) and the resistor (40) are both located on the upper side of the mask (111).

7. The disconnecting switch according to claim 5, characterized in that, The disconnector switch body (10) also includes an arc-extinguishing chamber (14), which is disposed inside the housing (11). The pre-charge circuit contactor (30) and the resistor (40) are both located on the front side of the arc-extinguishing chamber (14).

8. A high-pressure box, characterized in that, It includes a housing (200) and a disconnect switch (100) as described in any one of claims 1-7, wherein the disconnect switch (100) is disposed within the housing (200).

9. The high-pressure box according to claim 8, characterized in that, The high-voltage box (1100) also includes a first fuse (300) and a second fuse (400). The first fuse (300) is connected to the positive terminal (21), and the second fuse (400) is connected to the negative terminal (22); or, the first fuse (300) is connected to the positive terminal (23), and the second fuse (400) is connected to the negative terminal (24).

10. An energy storage system, characterized in that, Includes the high-pressure box (1100) as described in claim 8 or 9.

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