A circuit breaker, a battery pack and a vehicle

Abstract

The present invention discloses a circuit breaker, a battery pack and a vehicle, which relate to the technical field of circuit breakers, and aim to solve the problem that the prior art cannot timely weaken the arc after the copper busbar in the circuit breaker is disconnected. The circuit breaker includes an electrical connection structure, a disconnecting device, an insulating liquid module and a driving device. The disconnecting device is arranged on one side of the electrical connection structure. The insulating liquid module includes at least insulating liquid. The driving device is used to drive the disconnecting device to move toward the electrical connection structure to disconnect the electrical connection structure, and drive the insulating liquid of the insulating liquid module to be sprayed on the position on the electrical connection structure disconnected by the disconnecting device. The circuit breaker is used to disconnect the circuit.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a circuit breaker, a battery pack and a vehicle. Background Art

[0002] At present, many devices in our lives use electricity as energy to a large extent. In order to ensure the safety of the equipment and prevent fires caused by accidental short circuits, most devices will be equipped with circuit breakers in the equipment lines. When the equipment circuit is overloaded and short-circuited or other situations occur, the circuit breaker can disconnect the circuit in time to prevent accidents.

[0003] The circuit breaker in the prior art uses a cutter to directly disconnect the copper busbar connected to the circuit to disconnect the circuit, so that the current at both ends of the copper busbar cannot be connected.

[0004] However, after the copper busbar is directly disconnected, a large arc will still remain at the location where the copper busbar is disconnected. If this large arc cannot be weakened or eliminated in time, it may cause voltage overload of the equipment, and even cause fire in serious cases. Summary of the invention

[0005] The object of the present invention is to provide a circuit breaker, a battery pack and a vehicle, aiming to solve the problem that the prior art cannot weaken the arc in time after the copper busbar in the circuit breaker is disconnected.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme:

[0007] In a first aspect, the present invention provides a circuit breaker, comprising an electrical connection structure, a disconnecting device, an insulating liquid module and a driving device. The disconnecting device is arranged on one side of the electrical connection structure. The insulating liquid module at least comprises insulating liquid. The driving device is used to drive the disconnecting device to move toward the electrical connection structure to disconnect the electrical connection structure, and drive the insulating liquid of the insulating liquid module to be sprayed on the position on the electrical connection structure to be disconnected by the disconnecting device.

[0008] In the circuit breaker provided in the embodiment of the present application, after the driving device is in operation, the disconnecting device can be driven to move in the direction of the electrical connection structure, so that the disconnecting device contacts the electrical connection structure and disconnects the electrical connection structure, thereby disconnecting the current flowing through the electrical connection structure. At the same time, when the disconnecting device moves toward the electrical connection structure, the insulating liquid module can release the insulating liquid contained therein, and the insulating liquid is sprayed to the position on the electrical connection structure disconnected by the disconnecting device.

[0009] This can reduce the intensity of the residual arc on the disconnected electrical connection structure and isolate the residual arc from other structures to a certain extent, preventing the residual arc from causing overload damage to other components and maintaining the stability of the circuit and the safety of the equipment.

[0010] In some embodiments, the electrical connection structure includes a main body and at least one weak portion connected to the main body, and the thickness of the weak portion is less than the thickness of the main body. When the driving device drives the disconnecting device to move toward the electrical connection structure, the disconnecting device contacts the at least one weak portion, and the electrical connection structure is disconnected by the at least one weak portion.

[0011] In some embodiments, the insulating liquid module further includes a protective sleeve. The insulating liquid is contained in the protective sleeve. The insulating liquid module is disposed between at least a portion of the disconnecting device and the electrical connection structure. When the disconnecting device moves toward the electrical connection structure, the protective sleeve can be fractured to cause the insulating liquid to leak and drip onto a position on the electrical connection structure disconnected by the disconnecting device.

[0012] In some embodiments, the circuit breaker further comprises a housing. A containing chamber is provided in the housing, and the insulating liquid is contained in the containing chamber. The containing chamber is provided with a liquid outlet, and the liquid outlet is communicated with the to-be-disconnected position of the electrical connection structure. The insulating liquid module further comprises a valve and a transmission structure. The valve is provided at the liquid outlet, and the transmission structure is connected between the disconnecting device and the valve. The transmission structure is used to drive the valve to move to open the liquid outlet when the disconnecting device moves toward the electrical connection structure.

[0013] In some embodiments, the transmission structure includes a contact member and a swing rod. The contact member is located between the disconnecting device and the electrical connection structure. The middle part of the swing rod is rotatably connected to the housing around the rotation axis, the contact member is connected to one end of the swing rod, and the valve is connected to the other end of the swing rod.

[0014] In some embodiments, the length of the portion of the rocker arm between the contact member and the rotating shaft is greater than the length of the portion of the rocker arm between the rotating shaft and the valve.

[0015] In some embodiments, the circuit breaker further comprises a piston, the disconnecting device is connected to the piston, and the disconnecting device is located between the piston and the electrical connection structure.

[0016] In some embodiments, the breaking device includes a first breaking knife and a second breaking knife arranged along a first direction. The blade of the first breaking knife and the blade of the second breaking knife extend along an arc, and the blade of the first breaking knife arches toward the blade of the second breaking knife, and the blade of the second breaking knife arches toward the blade of the first breaking knife. The first direction is the extension direction of the electrical connection path on the electrical connection structure.

[0017] In some embodiments, the circuit breaker further comprises a housing. A cylindrical accommodating cavity is provided in the housing. The cylindrical accommodating cavity extends toward the electrical connection structure from one axial end of the cylindrical accommodating cavity to the other axial end of the cylindrical accommodating cavity. The piston is slidably accommodated in the cylindrical accommodating cavity along the axial direction of the cylindrical accommodating cavity. The driving device comprises a gas generating device, and an exhaust port of the gas generating device is connected to a portion of the cylindrical accommodating cavity of the piston that is opposite to the electrical connection structure.

[0018] In some embodiments, the circuit breaker further comprises a housing and an arc extinguishing grid. An arc extinguishing cavity is provided in the housing, and the arc extinguishing cavity is located on a side of the electrical connection structure facing away from the disconnecting device. When the disconnecting device moves toward the electrical connection structure to disconnect the electrical connection structure, it can push the electrical connection structure to swing into the arc extinguishing cavity. The arc extinguishing grid is located in the arc extinguishing cavity.

[0019] In some embodiments, the arc chute includes a first group of arc chute. The first group of arc chute includes a first spacer. When the disconnecting device moves toward the electrical connection structure to disconnect the electrical connection structure, it pushes the part of the electrical connection structure located on the disconnection position side to swing into the first spacer.

[0020] In some embodiments, the arc extinguishing grid further includes a second group of arc extinguishing grids, and the first group of arc extinguishing grids and the second group of arc extinguishing grids are arranged at intervals along the first direction. When the disconnecting device moves toward the electrical connection structure to disconnect the electrical connection structure, it pushes the portion of the electrical connection structure located on the other side of the disconnecting position to swing toward the second group of arc extinguishing grids. The first direction is the extension direction of the electrical connection path on the electrical connection structure.

[0021] In some embodiments, the first spacer includes a first partition portion, a second partition portion, and a third partition portion. The first partition portion and the second partition portion are spaced apart along the second direction, an end of the first partition portion facing the second group of arc extinguishing grids is the first end, an end of the second partition portion facing the second group of arc extinguishing grids is the second end, and the third partition portion is connected between the first end and the second end. The second direction is perpendicular to the first direction.

[0022] In some embodiments, the third partition plate portion is in an arc plate shape and the third partition plate portion is arched toward the second group of arc extinguishing grids.

[0023] In some embodiments, an edge of the third partition portion facing the electrical connection structure is provided with an avoidance gap.

[0024] In some embodiments, a side surface of the third partition portion facing away from the second group of arc extinguishing grids includes at least one step surface.

[0025] In some embodiments, the first set of arc extinguishing grids further includes an arc extinguishing grid body, the arc extinguishing grid body is located in the first spacer, and a height of the arc extinguishing grid body is less than a height of the first spacer.

[0026] In some embodiments, the arc extinguishing grid body includes a plurality of arc extinguishing grids arranged at intervals. Each arc extinguishing grid includes a first grid portion, a second grid portion and a third grid portion, the first grid portion and the second grid portion are arranged at intervals along the second direction, one end of the first grid portion facing the second group of arc extinguishing grids is the third end, one end of the second grid portion facing the second group of arc extinguishing grids is the fourth end, and the third grid portion is connected between the third end and the fourth end. The second direction is perpendicular to the extension direction of the electrical connection path on the electrical connection structure.

[0027] In some embodiments, the third grid segment is in an arc-shaped shape, and the third grid segment arches toward the second group of arc-extinguishing grids.

[0028] In some embodiments, the first spacer further includes a first lining plate and a second lining plate. The first lining plate is disposed between the first partition portion and the arc extinguishing grid body, and a first arc extinguishing gap is formed between the first lining plate and the first partition portion. The second lining plate is disposed between the second partition portion and the arc extinguishing grid body, and a second arc extinguishing gap is provided between the second lining plate and the second partition portion. One end of the first arc extinguishing gap facing the third partition portion and one end of the second arc extinguishing gap facing the third partition portion are both open.

[0029] In a second aspect, the present invention further provides a battery pack, comprising a battery assembly, a control circuit and any one of the above-mentioned circuit breakers. The control circuit is connected to the battery assembly. The electrical connection structure of the circuit breaker is connected to the control circuit.

[0030] In a third aspect, the present invention further provides an electrical device, comprising a circuit and any one of the above-mentioned circuit breakers, wherein the circuit breaker is arranged in the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 A schematic structural diagram of a circuit breaker provided by the present invention;

[0033] Figure 2 for Figure 1 Schematic diagram of the structure of the circuit breaker after use;

[0034] Figure 3 for Figure 1 Schematic diagram of the structure of the middle piston and the breaking device;

[0035] Figure 4 for Figure 2 Schematic diagram of the structure of the arc extinguishing grid;

[0036] Figure 5 A schematic structural diagram of another circuit breaker provided by the present invention;

[0037] Figure 6 for Figure 5 Schematic diagram of the structure of the circuit breaker after use.

[0038] Figure numerals: 100-circuit breaker; 10-electrical connection structure; 101-weak part; 11-first part; 12-second part; 13-third part; 20-breaking device; 21-piston; 22-first breaking knife; 23-second breaking knife; 30-insulating liquid module; 31-insulating liquid; 40-driving device; 41-ignition tube; 42-ignition tube base; 50-housing; 501-accommodating chamber; 502-circulation groove; 503-accommodating chamber; 51-upper cover; 52-upper end shell; 53-base; 5301-arc extinguishing chamber; 54-lower end base; 55- Base bottom plate; 56-sleeve; 60-arc extinguishing grid; 61-first group of arc extinguishing grids; 611-first spacer sleeve; 6111-first partition portion; 6112-second partition portion; 6113-third partition portion; 6114-avoidance gap; 6115-step surface; 6116-first inner lining plate; 6117-second inner lining plate; 612-arc extinguishing grid body; 6121-arc extinguishing grid piece; 61211-first grid piece portion; 61212-second grid piece portion; 61213-third grid piece portion; 62-second group of arc extinguishing grids; 63-first arc extinguishing gap; 64-second arc extinguishing gap. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside" and the like indicate directions or positional relationships based on the directions or relative positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. Unless otherwise specified, the above-mentioned directional description can be flexibly set in the process of actual application under the condition that the relative positional relationship shown in the accompanying drawings is satisfied.

[0041] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. It can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the embodiments of the present invention, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, article or device including the element.

[0044] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0045] In the related technology, considering the usage characteristics and usage environment of the battery pack, the traditional fuses are not very effective under conditions such as withstanding pulse current and quickly breaking low-fold fault current. In addition, the working conditions of the vehicle often shorten the life of the traditional fuses, and the cost of frequent replacement and maintenance will also increase.

[0046] As a result, smart fuses appeared, which can disconnect the conductive device through a gas generating device and push the conductive device into the arc extinguishing device to achieve the arc extinguishing effect when a circuit fault occurs.

[0047] However, the smart fuses in the related art have some shortcomings and defects. Due to the limitation of air, the arc on the conductive device is difficult to be extinguished, and the arc cannot be extinguished quickly when the conductive device is disconnected.

[0048] Based on this, the present invention also provides an electrical device, including a circuit and any one of the above-mentioned circuit breakers, wherein the circuit breaker is arranged in the circuit.

[0049] As a switching element, the circuit breaker can directly act on the operating circuit of the terminal. By controlling the circuit breaker, the disconnection and connection of the terminal circuit can be controlled.

[0050] Exemplarily, the electrical equipment may be terminal equipment such as vehicles, ships, and energy storage cabinets.

[0051] The present invention also provides a battery pack, comprising a battery assembly, a control circuit and any one of the above-mentioned circuit breakers. The control circuit is connected to the battery assembly. The electrical connection structure of the circuit breaker is connected to the control circuit.

[0052] The control circuit can control the working state of the battery assembly and control the distribution and output of electric energy by the battery assembly. The circuit breaker is connected to the control circuit. When the circuit breaker is operated, it can interrupt the operation of the control circuit, thereby interrupting the output of electric energy from the battery assembly to the outside world and maintaining the safety of the circuit and equipment.

[0053] like Figure 1 As shown, Figure 1 A schematic diagram of the structure of a circuit breaker provided by the present invention. The present invention provides a circuit breaker 100, which may include an electrical connection structure 10, a disconnecting device 20, an insulating liquid module 30, and a driving device 40. The disconnecting device 20 is arranged on one side of the electrical connection structure 10. The insulating liquid module 30 includes at least insulating liquid 31. The driving device 40 is used to drive the disconnecting device 20 to move toward the electrical connection structure 10 to disconnect the electrical connection structure 10, and at the same time drive the insulating liquid 31 of the insulating liquid module 30 to be sprayed on the position on the electrical connection structure 10 to be disconnected by the disconnecting device 20.

[0054] The electrical connection structure 10 is mainly connected to the circuit in the device. The disconnecting device 20 can contact the electrical connection structure 10 and disconnect the electrical connection structure 10 from the position where it contacts the disconnecting device 20. The insulating liquid module 30 can release insulating oil. The driving device 40 can drive the disconnecting device 20 to move, so as to drive the operation of the entire circuit breaker 100.

[0055] In the circuit breaker 100 provided in the embodiment of the present application, after the driving device 40 is in operation, the disconnecting device 20 can be driven to move toward the electrical connection structure 10, so that the disconnecting device 20 contacts the electrical connection structure 10 and disconnects the electrical connection structure 10, thereby disconnecting the current flowing through the electrical connection structure 10. When the disconnecting device 20 moves toward the electrical connection structure 10, the insulating liquid module 30 can release the insulating liquid 31 contained therein, and the insulating liquid 31 is sprayed to the position on the electrical connection structure 10 disconnected by the disconnecting device 20.

[0056] In this way, the intensity of the residual arc on the disconnected electrical connection structure 10 can be reduced, and the residual arc can be isolated from other structures to a certain extent, preventing the residual arc from causing overload damage to other components, thereby maintaining the stability of the circuit and the safety of the equipment.

[0057] Exemplarily, the electrical connection structure 10 may be a copper bar, and connection holes may be provided at both ends of the copper bar. The copper bar is located in the circuit, and both ends are connected to the circuit in the circuit through the connection holes. When the copper bar is disconnected by the disconnecting device 20, the circuit where the copper bar is located is also disconnected, so that the circuit where the copper bar is located cannot continue to operate.

[0058] It can be seen that the circuit breaker 100 is generally connected in series in the circuit, so that when the copper bar disconnects the circuit where it is located, the entire circuit can be stopped and the circuit can be safely protected.

[0059] For example, Figure 1 As shown, the driving device 40 may be a gas generating device. The gas generating device may include an ignition tube 41 and an ignition tube base 42. When a fault occurs in the circuit where the circuit breaker 100 is located, the ignition tube 41 receives a trigger signal, causing the ignition tube 41 to be detonated. After the ignition tube 41 is detonated, high-pressure gas is generated, and the high-pressure gas acts on the disconnecting device 20, causing the disconnecting device 20 to move toward the electrical connection structure 10, thereby disconnecting the electrical connection structure 10.

[0060] The ignition tube base 42 is sleeved on the outside of the ignition tube 41, and the lead of the ignition tube 41 extends out of the ignition tube base 42 and is exposed, so as to be easily detonated. In other embodiments, the driving device 40 can also be a hydraulic operating mechanism. The hydraulic operating mechanism uses high-pressure hydraulic oil to drive the hydraulic cylinder, so that the hydraulic cylinder drives the disconnecting device 20 to move toward the electrical connection structure 10, thereby disconnecting the electrical connection structure 10.

[0061] There is no specific limitation on the structural type of the driving device 40 , as long as it can drive the disconnecting device 20 to disconnect the electrical connection structure 10 when a fault occurs in the circuit where the circuit breaker 100 is located.

[0062] In some embodiments, Figure 1 As shown, the electrical connection structure 10 includes a main body and at least one weak portion 101 connected to the main body, and the thickness of the weak portion 101 is less than the thickness of the main body. When the driving device 40 drives the disconnecting device 20 to move toward the electrical connection structure 10, the disconnecting device 20 contacts the at least one weak portion 101, and the electrical connection structure 10 is disconnected by the at least one weak portion 101.

[0063] The thickness of the electrical connection structure 10 at the weak portion 101 is thinner than that at other locations of the electrical connection. Therefore, the disconnecting device 20 can disconnect the electrical connection structure 10 more easily at this location, so that the arc on the electrical connection structure 10 can be disconnected more easily.

[0064] Exemplarily, the electrical connection structure 10 may be a fuse, i.e., a fusible wire. The electrical connection structure 10 may be made of a low melting point metal, so that when a large current passes through the electrical connection structure 10, it can be quickly melted to disconnect the circuit. Specifically, the material of the electrical connection structure 10 may be lead, tin, copper alloy, etc.

[0065] Therefore, when the strength of the electric arc on the electrical connection structure 10 is within a controllable range and will not cause damage to other equipment, the electrical connection structure 10 can be melted only by the current. When the strength of the electric arc on the electrical connection structure 10 is large and can cause damage to other external equipment, the disconnecting device 20 is required to quickly disconnect the electrical connection structure 10 from the weak portion 101 to disconnect the electric arc.

[0066] In some embodiments, the insulating liquid module 30 may further include a protective sleeve. The insulating liquid 31 is contained in the protective sleeve. The insulating liquid module 30 is disposed between at least a portion of the disconnecting device 20 and the electrical connection structure 10. When the disconnecting device 20 moves toward the electrical connection structure 10, the protective sleeve can be crushed to cause the insulating liquid 31 to leak and drip onto the position on the electrical connection structure 10 disconnected by the disconnecting device 20.

[0067] When the disconnecting device 20 moves toward the electrical connection structure 10, it will first contact the insulating liquid module 30 located between at least part of the disconnecting device 20 and the electrical connection structure 10. When the disconnecting device 20 continues to move toward the electrical connection structure 10, the disconnecting device 20 will disconnect the electrical connection structure 10 and apply an extrusion force in the direction of the electrical connection structure 10 to the protective cover containing the insulating liquid 31. When the value of the extrusion force reaches a certain level, the protective cover will rupture and the insulating liquid 31 in the protective cover will leak. The insulating liquid 31 will drip onto the position on the electrical connection structure 10 disconnected by the disconnecting device 20, cool the temperature of the electrical connection structure 10 and reduce the intensity of the arc on the electrical connection structure 10.

[0068] Exemplarily, the insulating liquid 31 may be transformer oil. Transformer oil is a liquid insulating material used in electrical equipment such as power transformers and reactors. Transformer oil has good electrical insulation properties and can prevent the propagation of arcs to a certain extent, thereby reducing the amount of arcs at both ends of the copper busbar being disconnected and protecting the equipment from damage.

[0069] At the same time, transformer oil can also absorb the temperature at the point where the copper busbar is disconnected, preventing dangerous situations such as fire due to excessive temperature.

[0070] For example, the protective cover can be made of a plastic film. The plastic film is a soft, thin film with good stability and good barrier properties. The plastic film can protect the insulating liquid 31 inside the circuit breaker 100 before it is started, and will not cause the insulating liquid 31 to leak in advance, thereby ensuring the safety of the circuit when it is disconnected.

[0071] At the same time, the soft plastic film can be broken under appropriate pressure. After the circuit breaker 100 is started, the breaking device 20 can squeeze the plastic film to break it and leak the insulating liquid 31 inside.

[0072] For example, the plastic film can be made of polyvinyl alcohol, which has good oil resistance and can better protect the insulating liquid 31 made of transformer oil inside. In addition, the polyvinyl alcohol material is more environmentally friendly.

[0073] In some embodiments, Figure 2 As shown, Figure 2 for Figure 1 The circuit breaker 100 is a schematic diagram of a structure after use. The circuit breaker 100 further includes a piston 21 , a disconnecting device 20 is connected to the piston 21 , and the disconnecting device 20 is located between the piston 21 and the electrical connection structure 10 .

[0074] After the piston 21 is subjected to the pressure exerted by the high-pressure gas, it moves toward the electrical connection structure 10, thereby driving the disconnecting device 20 connected to the piston 21 to move toward the electrical connection structure 10. Then the disconnecting device 20 will contact the electrical connection structure 10, and then disconnect the electrical connection structure 10 under the action of pressure.

[0075] Exemplarily, the number of the disconnecting device 20 may be one, and one disconnecting device 20 can divide the electrical connection structure 10 into two structures, so that the arc on the electrical connection structure 10 is separated, thereby preventing the possibility of harm caused by a large arc in the circuit.

[0076] The number of the disconnecting devices 20 can be set according to the requirements without any specific limitation, as long as they can separate the electrical connection structure 10 and the arcs thereon.

[0077] In some embodiments, Figure 3 As shown, Figure 3 for Figure 1 A schematic diagram of the structure of the middle piston 21 and the breaking device 20, wherein the breaking device 20 may include a first breaking knife 22 and a second breaking knife 23 arranged along a first direction X. The blade of the first breaking knife 22 and the blade of the second breaking knife 23 extend along an arc, and the blade of the first breaking knife 22 arches toward the blade of the second breaking knife 23, and the blade of the second breaking knife 23 arches toward the blade of the first breaking knife 22. The first direction X is the extension direction of the electrical connection path on the electrical connection structure 10.

[0078] The blades of the first breaking knife 22 and the second breaking knife 23 extending along the arc line can form an arc-shaped cross-section at the position where the electrical connection structure 10 is broken. Compared with a general straight cross-section, the arc-shaped cross-section area is larger, and the intensity of the arc distributed per unit area is smaller, so the arc on the arc-shaped cross-section is less likely to cause dangerous accidents and is easier to be eliminated.

[0079] The first breaking knife 22 and the second breaking knife 23 can make the arc extinguishing efficiency of the two ends of the electrical connection structure 10 to be broken the same. The arc surfaces of the blades of the first breaking knife 22 and the second breaking knife 23 are arched toward each other, and the shapes of the two ends are the same, so that the end faces of the electrical connection structure 10 cut by the blades of the first breaking knife 22 and the blades of the second breaking knife 23 are the same.

[0080] Exemplarily, the blade of the first breaking knife 22 and the blade of the second breaking knife 23 may be in an arc shape. The arc-shaped blade is convenient for processing, and the shapes of the blades of the first breaking knife 22 and the second breaking knife 23 can be easily adjusted to a consistent shape.

[0081] In some embodiments, Figure 2 As shown, the circuit breaker 100 may further include a housing 50 .

[0082] For example, Figure 2 As shown, the housing 50 may include an upper cover 51, an upper shell 52, a base 53, a lower base 54, a base bottom plate 55 and a sleeve 56. Along the moving direction of the disconnecting device 20, the upper cover 51, the upper shell 52, the base 53, the lower base 54 and the base bottom plate 55 are arranged in sequence. Among them, the electrical connection structure 10 is located between the upper shell 52 and the base 53. The sleeve 56 is located in the upper shell 52.

[0083] The base 53 is located on the side of the electrical connection structure 10 facing away from the upper housing 52, and is used to support the electrical connection structure 10 and maintain the stability of the electrical connection structure 10. The lower base 54 and the base bottom plate 55 are located on the side of the base 53 away from the electrical connection structure 10, and are used to support the structure of the entire circuit breaker 100.

[0084] A cylindrical accommodating chamber 503 is provided in the housing 50. Specifically, the cylindrical accommodating chamber 503 is provided in the sleeve 56. The cylindrical accommodating chamber 503 extends toward the electrical connection structure 10 from one axial end of the cylindrical accommodating chamber 503 to the other axial end of the cylindrical accommodating chamber 503. The piston 21 is slidably accommodated in the cylindrical accommodating chamber 503 along the axial direction of the cylindrical accommodating chamber 503. The driving device 40 includes a gas generating device, and the exhaust port of the gas generating device is communicated with the part of the cylindrical accommodating chamber 503 of the piston 21 that is opposite to the electrical connection structure 10.

[0085] Specifically, because the cylindrical accommodating cavity 503 extends toward the electrical connection structure 10 from one axial end of the cylindrical accommodating cavity 503 to the other axial end of the cylindrical accommodating cavity 503, the piston 21 can slide toward the electrical connection structure 10 in the cylindrical accommodating cavity 503. At the same time, the piston 21 also drives the disconnecting device 20 to slide toward the electrical connection structure 10, so that the disconnecting device 20 connected to the base disconnects the electrical connection structure 10.

[0086] Exemplarily, the material of the sleeve 56 can be steel. Steel has a large strength, and the sleeve 56 made of steel can provide a stable operating space for the piston 21, the first breaking knife 22 and the second breaking knife 23 inside it.

[0087] Exemplarily, the shape of the columnar accommodation cavity 503 may be cylindrical.

[0088] In other embodiments, the shape of the cylindrical accommodating cavity 503 may also be a prism. There is no specific limitation on the shape of the cylindrical accommodating cavity 503 as long as the driving device 40 and the disconnecting device 20 can move therein toward the electrical connection structure 10 .

[0089] Of course, the columnar accommodation cavity 503 may also be a square columnar accommodation cavity, an elliptical columnar accommodation cavity, etc., and this application does not make any specific limitation on this.

[0090] In some embodiments, Figure 2 As shown, the circuit breaker 100 may further include an arc extinguishing grid 60. An arc extinguishing cavity 5301 is provided in the housing 50, and the arc extinguishing cavity 5301 is located on the side of the electrical connection structure 10 facing away from the disconnecting device 20. When the disconnecting device 20 moves toward the electrical connection structure 10 to disconnect the electrical connection structure 10, it can push the electrical connection structure 10 to swing into the arc extinguishing cavity 5301. The arc extinguishing grid 60 is located in the arc extinguishing cavity 5301.

[0091] Specifically, an arc extinguishing chamber 5301 may be provided in the base 53. Since the base 53 is located on the side of the electrical connection structure 10 facing away from the disconnecting device 20, it can support the electrical connection structure 10, so that the two ends of the electrical connection structure 10 facing away from the disconnecting device 20 will be supported by the base 53. Therefore, after the electrical connection structure 10 is subjected to the pressure applied by the disconnecting device 20, the position where it is not supported and in contact with the disconnecting device 20 will be disconnected.

[0092] After the disconnecting device 20 disconnects the electrical connection structure 10, it will continue to move toward the base bottom plate 55 under the action of the high-pressure gas. The disconnecting device 20 continues to move and can drive the disconnected electrical connection structure 10 to move toward the base bottom plate 55. At the same time, because the part of the electrical connection structure 10 in contact with the base 53 is supported and will not move toward the base bottom plate 55 under the drive of the disconnecting device 20, the disconnected part of the electrical connection structure 10 will swing with the position in contact with the base 53 as the center of the circle.

[0093] The disconnected portion of the electrical connection structure 10 will swing into the arc extinguishing chamber 5301, so that the arc extinguishing chamber 5301 extinguishes the arc on the disconnected portion of the electrical connection structure 10 to prevent the electric arc from causing harm.

[0094] In some embodiments, Figure 4 As shown, Figure 4 for Figure 2 Schematic diagram of the structure of the arc extinguishing grid 60. The arc extinguishing grid 60 includes a first group of arc extinguishing grids 61.

[0095] When the disconnecting device 20 moves toward the base bottom plate 55, it can drive the electric connection structure 10 with the electric arc to move toward the first set of arc extinguishing grids 61. The first set of arc extinguishing grids 61 can contact the disconnected electric connection structure 10, so that the first set of arc extinguishing grids 61 can extinguish the arc of the disconnected electric connection structure 10, thereby preventing the electric arc from damaging the circuit and equipment.

[0096] In some embodiments, Figure 4 As shown, the arc extinguishing grid 60 may further include a second group of arc extinguishing grids 62, and the first group of arc extinguishing grids 61 and the second group of arc extinguishing grids 62 are arranged at intervals along the first direction X. When the disconnecting device 20 moves toward the electrical connection structure 10 to disconnect the electrical connection structure 10, it pushes the portion of the electrical connection structure 10 located on the other side of the disconnection position to swing toward the second group of arc extinguishing grids 62. The first direction X is the extension direction of the electrical connection path on the electrical connection structure 10.

[0097] The second set of arc extinguishing grids 62 spaced apart from the first set of arc extinguishing grids 61 along the first direction X can extinguish the arc on the other partially disconnected electrical connection structure 10. When the disconnecting device 20 moves toward the electrical connection structure 10 to disconnect the electrical connection structure 10, it pushes the portion of the electrical connection structure 10 located on the disconnection position side to swing into the second set of arc extinguishing grids 62.

[0098] When the disconnecting device 20 moves toward the base bottom plate 55, it can drive the arcing electrical connection structure 10 to move toward the second set of arc extinguishing grids 62. The second set of arc extinguishing grids 62 can contact the disconnected electrical connection structure 10, so that the second set of arc extinguishing grids 62 extinguish the arc of the disconnected electrical connection structure 10, thereby preventing the arc from damaging the circuit and equipment.

[0099] Because the two ends of the electrical connection structure 10 are spaced apart when the electrical connection structure 10 is separated by the breaking device 20 and is driven by the breaking device 20 to continue to move into the arc extinguishing chamber 5301, a first group of arc extinguishing grids 61 and a second group of arc extinguishing grids 62 can be arranged spaced apart, so that both sections of the electrical connection structure 10 with arcs can be arc extinguished.

[0100] In other embodiments, the arc extinguishing grid 60 may also be provided with only the first group of arc extinguishing grids 61, without providing the second group of arc extinguishing grids 62. The present application is exemplified by the fact that the arc extinguishing grid 60 includes both the first group of arc extinguishing grids 61 and the second group of arc extinguishing grids 62, which cannot be regarded as a special limitation on the structure of the arc extinguishing grid 60. The structure of the first group of arc extinguishing grids 61 will be described in detail below, and the structure of the second group of arc extinguishing grids 62 may be the same as that of the first group of arc extinguishing grids 61, and the present application does not repeat the structure of the second group of arc extinguishing grids 62.

[0101] In some embodiments, Figure 4 As shown, the first set of arc extinguishing grids 61 includes a first spacer 611. When the disconnecting device 20 moves toward the electrical connection structure 10 to disconnect the electrical connection structure 10, it pushes the portion of the electrical connection structure 10 located at the disconnecting position side to swing into the first spacer 611.

[0102] Optional, such as Figure 4 As shown, the first spacer 611 may include a first partition portion 6111, a second partition portion 6112 and a third partition portion 6113. The first partition portion 6111 and the second partition portion 6112 are spaced apart along the second direction Y, one end of the first partition portion 6111 facing the second group of arc extinguishing grids 62 is the first end, one end of the second partition portion 6112 facing the second group of arc extinguishing grids 62 is the second end, and the third partition portion 6113 is connected between the first end and the second end. The second direction Y is perpendicular to the first direction X.

[0103] The first partition portion 6111 and the second partition portion 6112 arranged at intervals along the second direction Y can protect the position of the electrical connection structure 10 along the second direction Y when the electrical connection structure 10 swings into the first group of arc extinguishing grids 61, thereby preventing the arc on the electrical connection structure 10 from leaking out and causing damage to other components.

[0104] The first end is an end of the first partition part 6111 close to the second group of arc extinguishing grids 62, and the second end is an end of the second partition part 6112 close to the second group of arc extinguishing grids 62, so the third partition part located between the first end and the second end is located on the side of the first partition part 6111 and the second partition part 6112 close to the second group of arc extinguishing grids 62. And the base 53 is located on the peripheral side of the integral arc extinguishing grid 60. Therefore, at the position of the electrical connection structure 10 along the first direction X, the disconnected electrical connection structure 10 can be protected by the third partition part 6113 and the base 53 to prevent the arc on the electrical connection structure 10 from leaking out and causing damage to other components.

[0105] In some embodiments, Figure 4 As shown, the third partition plate portion 6113 may be in an arc plate shape, and the third partition plate portion 6113 is arched toward the second group of arc extinguishing grids 62 .

[0106] Because the shape of the interface where the electrical connection structure 10 is disconnected is arc-shaped, the arc-shaped third partition plate portion 6113 can better fit the shape of the disconnected electrical connection structure 10, so that when the disconnected electrical connection structure 10 swings, the position is not easily blocked or affected by the first spacer 611 or the second spacer. In addition, the third partition plate portion 6113 that better fits the shape of the disconnected electrical connection structure 10 can provide more stringent protection for the arc thereon, preventing the arc from leaking to other structures.

[0107] In other embodiments, the third partition plate portion 6113 may be in a flat plate shape, a wavy shape, or other shapes. As long as the third partition plate portion 6113 can be connected to the first end and the second end, the arc on the disconnected electrical connection structure 10 can be protected.

[0108] In some embodiments, Figure 2 and Figure 4 As shown, an edge of the third partition portion 6113 facing the electrical connection structure 10 may be provided with an avoidance notch 6114 .

[0109] When the first breaking knife 22 and the second breaking knife 23 of the electrical connection structure 10 are used to cut the electrical connection structure 10, the electrical connection structure 10 is cut into a first part 11, a second part 12 and a third part 13. The first part 11 is located between the first breaking knife 22 and the upper end housing 52, the second part 12 is located between the second breaking knife 23 and the upper end housing 52, and the third part 13 is located between the first breaking knife 22 and the second breaking knife 23.

[0110] The first part 11 and the second part 12 will continue to move toward the arc extinguishing chamber 5301 driven by the breaking device 20, and the third part 13 will move toward the lower end base 54 under the action of gravity without the support of other parts. In order to prevent the third part 13 from directly contacting other parts and causing the arc on it to affect other parts, an avoidance notch 6114 can be provided at the edge of the third partition part 6113 facing the electrical connection structure 10.

[0111] At the same time, the avoidance notch 6114 can also avoid the position of the disconnected electrical connection structure 10 during the swing, thereby preventing the disconnected electrical connection structure 10 from being blocked by the third partition part 6113 and the sixth partition part, making it impossible to extinguish the arc.

[0112] In some other embodiments, the third partition portion 6113 and the sixth partition portion may not be provided with the avoidance gap 6114 .

[0113] In some embodiments, Figure 4 As shown, the side surface of the third partition plate portion 6113 facing away from the second group of arc extinguishing grids 62 may include at least one step surface 6115 .

[0114] When the first part 11 swings toward the arc extinguishing chamber 5301, the distance between the third partition part 6113 and the first part 11 can be reduced through the step surface 6115, but the continuous swing of the first part 11 will not be hindered. When the first part 11 swings to a position opposite to the step surface 6115, the arc it carries can be dispersed and transferred along the step surface 6115 to extinguish the arc, thereby improving the arc extinguishing effect.

[0115] Meanwhile, there may be multiple step surfaces 6115 , and the multiple step surfaces 6115 can disperse the arc of the first portion 11 multiple times, so that the arc on the first portion 11 can be fully extinguished.

[0116] Exemplarily, the number of the step surfaces 6115 may be three or four.

[0117] In some embodiments, Figure 4 As shown, the first group of arc extinguishing grids 61 may further include an arc extinguishing grid body 612 , which is located in the first spacer 611 , and the height of the arc extinguishing grid body 612 is less than the height of the first spacer 611 .

[0118] Because the height of the arc extinguishing grid body 612 is less than the height of the first spacer 611 and is located in the first spacer 611, the first part 11 swings in the first spacer and finally contacts the arc extinguishing grid body 612, and transmits its own arc to the arc extinguishing grid body 612. The arc extinguishing grid body 612 can extinguish the arc on the first part 11.

[0119] In some embodiments, Figure 4 As shown, the arc extinguishing grid body 612 may include a plurality of arc extinguishing grids 6121 arranged at intervals. Each arc extinguishing grid 6121 includes a first grid portion 61211, a second grid portion 61212 and a third grid portion 61213. The first grid portion 61211 and the second grid portion 61212 are arranged at intervals along the second direction Y. One end of the first grid portion 61211 facing the second group of arc extinguishing grids 62 is the third end, and one end of the second grid portion 61212 facing the second group of arc extinguishing grids 62 is the fourth end. The third grid portion 61213 is connected between the third end and the fourth end. The second direction Y is perpendicular to the extension direction of the electrical connection path on the electrical connection structure 10.

[0120] When the first portion 11 contacts the arc extinguishing grid body 612, it will first contact the third grid section 61213 connected between the third end and the fourth end. The third grid section 61213 first breaks the arc along the length direction of the third grid section 61213, and then transmits the arc to the first grid section 61211 and the second grid section 61212. The first grid section 61211 and the second grid section 61212 will then cut the arc along the length direction of the first grid section 61211 and the second grid section 61212.

[0121] In this way, the arc is cut in different directions, which can ensure that the arc is divided into multiple small arcs, and the small arcs are extinguished quickly without much impact on external equipment. Thus, the arc on the electrical connection structure 10 can be quickly extinguished.

[0122] Exemplarily, the number of the first grid sheet portion 61211, the second grid sheet portion 61212 and the third grid sheet portion 61213 may be multiple, multiple first grid sheet portions 61211 are arranged at intervals, multiple second grid sheet portions 61212 are arranged at intervals, and multiple third grid sheet portions 61213 are arranged at intervals. An arc extinguishing gap can be formed between the grid sheets arranged at intervals, and multiple arc extinguishing gaps can divide the arc into multiple small arcs again, further enhancing the arc extinguishing speed.

[0123] In some embodiments, Figure 4 As shown, the third grid plate portion 61213 may be in an arc shape, and the third grid plate portion 61213 is arched toward the second group of arc-extinguishing grids 62 .

[0124] The arc-shaped third grid sheet portion 61213 can smoothly connect the first grid sheet portion 61211 and the second grid sheet portion 61212. A smooth connection is beneficial to the conduction speed of the arc and increases the arc extinguishing speed.

[0125] In other embodiments, the third grid portion 61213 may be flat or wavy. The shape of the third grid portion 61213 is not specifically limited, as long as it can conduct the arc from the third grid portion 61213 to the first grid portion 61211 and the second grid portion 61212.

[0126] In some embodiments, Figure 4 As shown, the first spacer 611 may further include a first inner lining plate 6116 and a second inner lining plate 6117. The first inner lining plate 6116 is disposed between the first baffle portion 6111 and the arc extinguishing grid body 612, and a first arc extinguishing gap 63 is formed between the first inner lining plate 6116 and the first baffle portion 6111. The second inner lining plate 6117 is disposed between the second baffle portion 6112 and the arc extinguishing grid body 612, and a second arc extinguishing gap 64 is provided between the second inner lining plate 6117 and the second baffle portion 6112. One end of the first arc extinguishing gap 63 facing the third baffle portion 6113 and one end of the second arc extinguishing gap 64 facing the third baffle portion 6113 are both open.

[0127] The first arc extinguishing gap 63 is located between the first partition plate 6111 and the arc extinguishing grid body 612 , and the second arc extinguishing gap 64 is located between the second partition plate 6112 and the arc extinguishing grid body 612 . The heights of the first inner lining plate 6116 and the second inner lining plate 6117 are higher than the heights of the arc extinguishing grid pieces 6121 .

[0128] When the first portion 11 contacts the step surface 6115, the third partition portion 6113 provided with the step surface 6115 can transmit part of the arc to the first arc extinguishing gap 63 and the second arc extinguishing gap 64 through the channel connected with the first arc extinguishing gap 63 and the second arc extinguishing gap 64, so as to separate the arc. At the same time, the third partition portion 6113 can also transmit the arc to the arc extinguishing grid body 612, so as to separate and extinguish the arc.

[0129] Thus, during the swinging process of the first part 11, the arc on the first part 11 can be extinguished by contacting the step surface 6115. Thus, when the first part 11 contacts the arc extinguishing grid body 612, electric sparks or other dangers will not be generated due to excessive number of arcs, further maintaining the safety of circuits and equipment.

[0130] like Figure 5 As shown, Figure 5 This is a schematic diagram of the structure of another circuit breaker 100 provided by the present invention. The circuit breaker provided by this embodiment includes an electrical connection structure 10, a disconnecting device 20, an insulating liquid module 30 and a driving device 40.

[0131] The electrical connection structure 10, the disconnecting device 20 and the driving device 40 are Figure 1-Figure 2The electrical connection structure 10, the disconnecting device 20 and the driving device 40 in the circuit breaker 100 are the same and will not be described in detail here. Figure 1-Figure 2 The insulating liquid module 30 in the circuit breaker 100 is different, and the insulating liquid module 30 of this embodiment will be described in detail below.

[0132] The housing 50 is provided with a housing chamber 501. The insulating liquid module 30 includes an insulating liquid 31, which is contained in the housing chamber 501. The housing chamber 501 is provided with a liquid outlet, which is connected to the position to be disconnected of the electrical connection structure 10. The insulating liquid module 30 also includes a valve and a transmission structure. The valve is provided at the liquid outlet, and the transmission structure is connected between the disconnecting device 20 and the valve. The transmission structure is used to drive the valve to move to open the liquid outlet when the disconnecting device 20 moves toward the electrical connection structure 10.

[0133] When the disconnecting device 20 moves toward the electrical connection structure 10, it can drive the transmission structure to move, so that the transmission structure drives the valve to move, and at the same time, the disconnecting device 20 disconnects the electrical connection structure 10. After the valve moves, the space in the accommodating cavity 501 can be connected with the space where the electrical connection structure 10 is located, so that the insulating liquid 31 is poured at the position where the electrical connection structure 10 is disconnected by the disconnecting device 20, cooling the temperature of the electrical connection structure 10 and reducing the intensity of the arc on the electrical connection structure 10.

[0134] A receiving cavity 501 for receiving the insulating liquid 31 is provided in the housing 50 , which can fix the position of the insulating liquid 31 , so that the insulating liquid 31 can be stored more stably and prevent the insulating liquid 31 from leaking in advance.

[0135] The upper cover 51 is located outside the ignition tube base 42 to further protect the explosion force generated by the ignition tube 41. The upper shell 52 is connected to the upper cover 51 and is used to accommodate the breaking device 20, the insulating liquid module 30 and the driving device 40. Among them, the accommodating cavity 501 for accommodating the insulating liquid 31 is located in the upper shell 52.

[0136] In some embodiments, the transmission structure may include a contact member and a swing rod. The contact member is located between a portion of the disconnecting device 20 and the electrical connection structure 10. The middle portion of the swing rod is rotatably connected to the housing 50 around a rotation axis, the contact member is connected to one end of the swing rod, and the valve is connected to the other end of the swing rod.

[0137] When the disconnecting device 20 moves toward the electrical connection structure 10, it will contact the contact piece and apply a force to the contact piece in the direction of the electrical connection structure 10. Because the swing rod connected to the contact piece is connected to the housing 50 around the rotation axis, after the contact piece is subjected to force, the force will be transmitted to the swing rod, causing the swing rod to rotate around the rotation axis. When the swing rod rotates, it will drive the valve connected to one end of it to rotate. When the valve rotates, it will shift, open the liquid outlet, and allow the insulating liquid 31 in the accommodating chamber 501 to be poured onto the position on the electrical connection structure 10 that is disconnected by the disconnecting device 20.

[0138] For example, a slope may be provided at the position where the contact piece contacts the disconnecting device 20. In this way, the direction of the force applied by the disconnecting device 20 to the contact piece position will change due to the angle of the slope, so that the oblique force can easily drive the swing rod to rotate.

[0139] In other embodiments, inclined surfaces may be provided at the positions of the disconnecting device 20 and the contact piece, so that the direction of the force applied to the contact piece can be inclined.

[0140] For example, Figure 6 As shown, Figure 6 for Figure 5 The schematic diagram of the structure of the circuit breaker 100 after use. The housing 50 may also include a circulation groove 502. The circulation groove 502 is located between the accommodating groove and the position where the electrical connection structure 10 is disconnected by the disconnecting device 20. One end of the circulation groove 502 is connected to the liquid outlet, and the other end leads to the position where the electrical connection structure 10 is disconnected by the disconnecting device 20. After the liquid outlet is opened, the insulating liquid 31 can flow along the circulation groove 502 to the position where the electrical connection structure 10 is disconnected, so as to cool down and extinguish the arc of the electrical connection structure 10. Among them, the circulation groove 502 is located in the upper end housing 52.

[0141] For example, Figure 6 As shown, the flow slot 502 may be L-shaped. The shape of the flow slot 502 is not particularly limited, as long as it can transfer the insulating liquid 31 from the containing tank to the position where the electrical connection structure 10 is disconnected by the disconnecting device 20 .

[0142] In other embodiments, the transmission structure may further include a moving part and a rotating part. The moving part is located between the disconnecting device 20 and the electrical connection structure 10, and one end of the moving part can contact the disconnecting device 20. One end of the rotating part is rotatably connected to the other end of the moving part, and the other end of the rotating part is connected to the valve.

[0143] The upper housing 52 may further include a moving groove and a limiting portion. The moving groove can only accommodate the moving member, limiting the moving member from moving in the moving groove toward the electrical connection structure 10. The limiting portion is located on the side of the rotating member facing away from the moving member, and can limit the position of the transmission structure.

[0144] When the disconnecting device 20 moves toward the electrical connection structure 10, it will contact the moving part, driving the moving part to move toward the electrical connection structure 10. The moving part tends to drive the rotating part to move, but the rotating part is restricted by the limiter and cannot move further toward the electrical connection structure 10. Therefore, the rotating part will rotate relative to the moving part under the action of the force. When the rotating part rotates, the position of the side of the rotating part connected to the valve changes, opening the liquid outlet, allowing the insulating liquid 31 to flow out of the liquid outlet and pour onto the position where the electrical connection structure 10 is disconnected, cooling the electrical connection structure 10 and extinguishing the arc.

[0145] In some embodiments, the length of the portion of the rocker arm between the contact member and the rotating shaft is greater than the length of the portion of the rocker arm between the rotating shaft and the valve.

[0146] In other embodiments, the length of the portion of the rocker arm between the contact member and the rotating shaft may also be equal to or less than the length of the portion of the rocker arm between the rotating shaft and the valve.

[0147] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0148] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A circuit breaker (100), characterized in that: include: Electrical connection structure (10); A disconnecting device (20), the disconnecting device (20) being arranged on one side of the electrical connection structure (10); An insulating liquid module (30), the insulating liquid module (30) comprising at least insulating liquid (31); a driving device (40), the driving device (40) being used to drive the disconnecting device (20) to move toward the electrical connection structure (10) so as to disconnect the electrical connection structure (10), and to drive the insulating liquid (31) of the insulating liquid module (30) to be sprayed onto a position on the electrical connection structure (10) disconnected by the disconnecting device (20); A housing (50), wherein a containing chamber (501) is provided in the housing (50), wherein the insulating liquid (31) is contained in the containing chamber (501), wherein the containing chamber (501) is provided with a liquid outlet, and wherein the liquid outlet is in communication with a position to be disconnected of the electrical connection structure (10); The insulating liquid module (30) further comprises a valve and a transmission structure, the valve being arranged at the liquid outlet, the transmission structure being connected between the disconnecting device (20) and the valve, the transmission structure being used to drive the valve to move so as to open the liquid outlet when the disconnecting device (20) moves towards the electrical connection structure (10); Wherein, the transmission structure comprises: A contact piece, the contact piece being located between a portion of the disconnecting device (20) and the electrical connection structure (10); A swing rod, wherein the middle portion of the swing rod is rotatably connected to the housing (50) around a rotation axis, the contact piece is connected to one end of the swing rod, and the valve is connected to the other end of the swing rod.

2. The circuit breaker (100) according to claim 1, characterized in that: The electrical connection structure (10) comprises a main body and at least one weak portion (101) connected to the main body, the thickness of the weak portion (101) being smaller than the thickness of the main body; When the driving device (40) drives the disconnecting device (20) to move toward the electrical connection structure (10), the disconnecting device (20) contacts the at least one weak portion (101), and disconnects the electrical connection structure (10) via the at least one weak portion (101).

3. The circuit breaker (100) according to claim 1, characterized in that: The insulating liquid module (30) further comprises a protective sleeve; the insulating liquid (31) is contained in the protective sleeve; The insulating liquid module (30) is arranged between at least a portion of the disconnecting device (20) and the electrical connection structure (10); When the disconnecting device (20) moves toward the electrical connection structure (10), it is capable of fracturing the protective cover, so that the insulating liquid (31) leaks and drips onto a position on the electrical connection structure (10) disconnected by the disconnecting device (20).

4. The circuit breaker (100) according to claim 1, characterized in that: The length of the portion of the rocker rod between the contact member and the rotating shaft is greater than the length of the portion of the rocker rod between the rotating shaft and the valve.

5. The circuit breaker (100) according to any one of claims 3 to 4, characterized in that: The circuit breaker (100) further comprises a piston (21), the disconnecting device (20) being connected to the piston (21), and the disconnecting device (20) being located between the piston (21) and the electrical connection structure (10).

6. The circuit breaker (100) according to claim 5, characterized in that: The breaking device (20) comprises a first breaking knife and a second breaking knife arranged along a first direction; The blade of the first breaking knife and the blade of the second breaking knife extend along an arc, and the blade of the first breaking knife arches toward the blade of the second breaking knife, and the blade of the second breaking knife arches toward the blade of the first breaking knife; The first direction is the extension direction of the electrical connection path on the electrical connection structure (10).

7. The circuit breaker (100) according to claim 5, characterized in that: Also includes: A housing (50), wherein a columnar accommodating cavity (503) is provided in the housing (50); the columnar accommodating cavity (503) extends from one axial end of the columnar accommodating cavity (503) to the other axial end of the columnar accommodating cavity (503) toward the electrical connection structure (10); the piston (21) is slidably accommodated in the columnar accommodating cavity (503) along the axial direction of the columnar accommodating cavity (503); The driving device (40) comprises a gas generating device, wherein an exhaust port of the gas generating device is in communication with a portion of the cylindrical accommodation cavity (503) of the piston (21) that faces away from the electrical connection structure (10).

8. The circuit breaker (100) according to any one of claims 1 to 4, characterized in that: Also includes: A housing (50), wherein an arc extinguishing chamber (5301) is provided in the housing (50), and the arc extinguishing chamber (5301) is located on a side of the electrical connection structure (10) that is opposite to the disconnecting device (20); when the disconnecting device (20) moves towards the electrical connection structure (10) to disconnect the electrical connection structure (10), it can push the electrical connection structure (10) to swing into the arc extinguishing chamber (5301); An arc extinguishing grid (60), wherein the arc extinguishing grid (60) is located in the arc extinguishing cavity (5301).

9. The circuit breaker (100) according to claim 8, characterized in that: The arc extinguishing grid (60) comprises a first group of arc extinguishing grids (61); The first group of arc extinguishing grids (61) comprises a first spacer (611); When the disconnecting device (20) moves towards the electrical connection structure (10) to disconnect the electrical connection structure (10), it pushes the portion of the electrical connection structure (10) located on one side of the disconnecting position to swing into the first spacer (611).

10. The circuit breaker (100) according to claim 9, characterized in that: The arc extinguishing grid (60) further comprises a second group of arc extinguishing grids (62), wherein the first group of arc extinguishing grids (61) and the second group of arc extinguishing grids (62) are arranged at intervals along a first direction; When the disconnecting device (20) moves toward the electrical connection structure (10) to disconnect the electrical connection structure (10), it pushes the portion of the electrical connection structure (10) located on the other side of the disconnecting position to swing toward the second group of arc extinguishing grids (62); The first direction is the extension direction of the electrical connection path on the electrical connection structure (10).

11. The circuit breaker (100) according to claim 10, characterized in that: The first spacer (611) comprises a first spacer portion (6111), a second spacer portion (6112) and a third spacer portion (6113); The first partition plate portion (6111) and the second partition plate portion (6112) are arranged at intervals along the second direction, an end of the first partition plate portion (6111) facing the second group of arc extinguishing grids (62) is a first end, an end of the second partition plate portion (6112) facing the second group of arc extinguishing grids (62) is a second end, and the third partition plate portion (6113) is connected between the first end and the second end; The second direction is perpendicular to the first direction.

12. The circuit breaker (100) according to claim 11, characterized in that: The third partition plate portion (6113) is in the shape of an arc plate; the third partition plate portion (6113) is arched toward the second group of arc extinguishing grids (62).

13. The circuit breaker (100) according to claim 11, characterized in that: An avoidance notch (6114) is provided on the edge of the third partition portion (6113) facing the electrical connection structure (10).

14. The circuit breaker (100) according to claim 11, characterized in that: The side surface of the third partition plate portion (6113) facing away from the second group of arc extinguishing grids (62) includes at least one step surface (6115).

15. The circuit breaker (100) according to claim 11, characterized in that: The first group of arc extinguishing grids (61) further comprises an arc extinguishing grid (60) body, the arc extinguishing grid (60) body is located in the first spacer (611), and the height of the arc extinguishing grid (60) body is less than the height of the first spacer (611).

16. The circuit breaker (100) according to claim 15, characterized in that: The arc extinguishing grid (60) main body comprises a plurality of arc extinguishing grid (60) pieces arranged at intervals; Each arc extinguishing grid (60) comprises a first grid section (61211), a second grid section (61212) and a third grid section (61213); the first grid section (61211) and the second grid section (61212) are arranged at intervals along a second direction; an end of the first grid section (61211) facing the second group of arc extinguishing grids (62) is a third end; an end of the second grid section (61212) facing the second group of arc extinguishing grids (62) is a fourth end; and the third grid section (61213) is connected between the third end and the fourth end; The second direction is perpendicular to the extension direction of the electrical connection path on the electrical connection structure (10).

17. The circuit breaker (100) according to claim 16, characterized in that: The third grid plate portion (61213) is in the shape of an arc plate, and the third grid plate portion (61213) is arched toward the second group of arc-extinguishing grids (62).

18. The circuit breaker (100) according to claim 15, characterized in that: The first spacer (611) further includes a first inner lining plate (6116) and a second inner lining plate (6117); The first inner lining plate (6116) is arranged between the first partition plate portion (6111) and the arc extinguishing grid (60) body, and a first arc extinguishing gap is formed between the first inner lining plate (6116) and the first partition plate portion (6111); The second inner lining plate (6117) is arranged between the second partition plate portion (6112) and the arc extinguishing grid (60) body, and a second arc extinguishing gap is provided between the second inner lining plate (6117) and the second partition plate portion (6112); One end of the first arc-extinguishing gap facing the third partition portion (6113) and one end of the second arc-extinguishing gap facing the third partition portion (6113) are both open.

19. A battery pack, characterized in that: include: Battery components; A control circuit connected to the battery assembly; as well as, The circuit breaker (100) according to any one of claims 1 to 18, wherein the electrical connection structure (10) of the circuit breaker (100) is connected to the control circuit.

20. An electrical equipment, characterized in that: The invention comprises a circuit and a circuit breaker (100) according to any one of claims 1 to 18, wherein the circuit breaker (100) is arranged in the circuit.

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