Circuit breaker, circuit breaking apparatus, motor controller, electric drive assembly, and vehicle

Abstract

Embodiments of the present application provide a circuit breaker, a circuit breaking apparatus, a motor controller, an electric drive assembly, and a vehicle. The circuit breaker comprises: an insulating housing; a plurality of conductive plates, arranged on the insulating housing at intervals, the plurality of conductive plates including at least two target conductive plates; and a pyrotechnic device, arranged on the insulating housing, and used for breaking off the at least two target conductive plates by means of airflows generated after the pyrotechnic device is triggered.

Description

Circuit breaker, circuit breaking device, motor controller, electric drive assembly and vehicle

[0001] The present application claims priority to the Chinese patent application No. 202411381474.5, filed on September 29, 2024, and entitled "Circuit breaker, circuit breaking device, motor controller, electric drive assembly and vehicle", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application belongs to the technical field of circuit breakers, and particularly relates to a circuit breaker, a circuit breaking device, a motor controller, an electric drive assembly and a vehicle. BACKGROUND

[0003] With the continuous development of the automobile industry, electric vehicles have been widely used in various industries. Electric vehicles usually include a motor controller, a battery pack and a drive motor, the motor controller is connected with the battery pack and the drive motor through a circuit, and the motor controller converts the electrical energy stored in the battery pack into the electrical energy required by the drive motor, so that the electric vehicle can run. However, during the running of the electric vehicle, short circuit, collision and other events may occur to cause large current in each connected circuit, causing damage to the motor controller, the battery pack and the motor.

[0004] In related technologies, a circuit breaker is usually connected in the circuit, the circuit breaker usually includes a conductive plate and an exploding device, the conductive plate is electrically connected with the circuit, and the exploding device can cut off the conductive plate, so that the circuit is disconnected to protect the motor controller, the battery pack and the motor. However, the circuit breaker cuts off the conductive plate by a punch, and the space volume of the circuit breaker is large. SUMMARY

[0005] The present application aims to provide a circuit breaker, a circuit breaking device, a motor controller, an electric drive assembly and a vehicle to solve the problem of large space volume of the existing circuit breaker.

[0006] In order to solve the above technical problems, the present application is implemented as follows:

[0007] In a first aspect, the present application discloses a circuit breaker, comprising:

[0008] an insulating shell;

[0009] a plurality of conductive plates, the plurality of conductive plates are arranged on the insulating shell in a spaced manner, and at least two target conductive plates are included in the plurality of conductive plates;

[0010] and an exploding device, the exploding device is arranged on the insulating shell, and the exploding device is used to cut off the at least two target conductive plates by the airflow generated after being exploded.

[0011] Optionally, the detonating device comprises a detonation tube.

[0012] The explosion flow generated by the detonating device after being detonated passes through the detonation tube to cut off the target conductive plate.

[0013] Optionally, the opening of the detonation tube is arranged on one side of the thickness direction of the target conductive plate.

[0014] Optionally, the opening of the detonation tube is arranged close to the target conductive plate, and there is a gap between the opening and the target conductive plate.

[0015] Optionally, the detonating device further comprises a detonating member, which is arranged at any position between the two openings of the detonation tube, and the detonating member is away from the target conductive plate relative to the opening in the thickness direction of the conductive plate.

[0016] Optionally, a weak part is arranged on the target conductive plate, and the end opening of the detonation tube is arranged corresponding to the weak part.

[0017] Optionally, the detonation tube is configured as an arc-shaped pipe, the detonating member is at least partially arranged in the middle of the arc-shaped pipe, and the two end openings of the arc-shaped pipe are respectively arranged corresponding to the weak parts of the two target conductive plates.

[0018] Optionally, the middle part of the detonation tube is provided with a detonation through hole, and the detonating member is embedded in the arc-shaped pipe by extending into the detonation through hole.

[0019] Optionally, the target conductive plate is provided with a recessed groove, the recessed groove is recessed in the direction away from the opening of the detonation tube, and the weak part is arranged at the recessed groove.

[0020] Optionally, the weak part comprises at least one cutout, and the cutout is arranged on the side of the target conductive plate away from the detonating device.

[0021] Optionally, the insulating shell comprises an upper body and a lower body, and a plurality of conductive plates are located between the upper body and the lower body.

[0022] Optionally, the detonating device comprises a detonation shell, and the detonation shell is mounted on the side of the upper body away from the lower body.

[0023] Optionally, the detonation shell side is further provided with an anti-explosion ear.

[0024] The anti-explosion ear is fixedly connected with the side of the upper body away from the lower body.

[0025] Optionally, the anti-explosion ear comprises at least two,

[0026] The explosion-proof ears are arranged on opposite sides of the explosion shell.

[0027] Optionally, the explosion-proof ears are arranged in a staggered manner on opposite sides of the explosion shell.

[0028] Optionally, the explosion shell and the upper body are integrally formed.

[0029] Optionally, the circuit breaker further comprises at least one arc-extinguishing fuse, two ends of the arc-extinguishing fuse being connected to two ends of the target conductive plate, respectively.

[0030] In a second aspect, the present application further discloses a circuit breaking device, comprising:

[0031] The circuit breaker according to any one of the above;

[0032] A current sensor connected to the conductive plate;

[0033] and a power device connected to the conductive plate;

[0034] The current sensor is used to detect the current on the conductive plate to control the explosion of the explosion device.

[0035] Optionally, the circuit breaking device further comprises a filter, the filter being arranged around the conductive plate.

[0036] In a third aspect, the present application further discloses a motor controller comprising the circuit breaking device described above, the power device being configured as a power switch module.

[0037] In a fourth aspect, the present application further discloses an electric drive assembly comprising the motor controller described above.

[0038] In a fifth aspect, the present application further discloses a vehicle comprising the electric drive assembly described above.

[0039] In the embodiments of the present application, the circuit breaker comprises an explosion device arranged on an insulating shell, the explosion device being used to break the at least two target conductive plates by the airflow generated after the explosion of the explosion device, so that the at least two conductive plates are directly broken by the airflow generated after the explosion of the explosion device, and thus a punch does not need to be arranged in the circuit breaker, the space volume of the circuit breaker is reduced, the structure of the circuit breaker is simpler, and the cost of the circuit breaker is reduced.

[0040] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0041] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings in which:

[0042] Fig. 1 is a structural schematic diagram of a circuit breaker according to an embodiment of the present application;

[0043] Fig. 2 is a sectional schematic diagram of a circuit breaker according to an embodiment of the present application;

[0044] Fig. 3 is a structural schematic diagram of an initiating device of a circuit breaker according to an embodiment of the present application;

[0045] Fig. 4 is a sectional schematic diagram of an initiating device of a circuit breaker according to an embodiment of the present application;

[0046] Fig. 5 is a structural schematic diagram of a target conductive plate of a circuit breaker according to an embodiment of the present application;

[0047] Fig. 6 is a structural schematic diagram of another circuit breaker according to an embodiment of the present application;

[0048] Fig. 7 is a sectional schematic diagram of another circuit breaker according to an embodiment of the present application;

[0049] Fig. 8 is a structural schematic diagram of a circuit breaking device according to an embodiment of the present application;

[0050] Fig. 9 is a structural exploded schematic diagram of a circuit breaking device according to an embodiment of the present application;

[0051] Fig. 10 is a connection schematic diagram of a circuit breaking device according to an embodiment of the present application;

[0052] Fig. 11 is a structural schematic diagram of a motor controller according to an embodiment of the present application;

[0053] Fig. 12 is a structural schematic diagram of an electric drive assembly according to an embodiment of the present application;

[0054] Fig. 13 is a structural schematic diagram of a vehicle according to an embodiment of the present application.

[0055] Fig. 13 is a structural schematic diagram of a vehicle according to an embodiment of the present application. Embodiments

[0056] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, for the purpose of explanation, and are not to be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work under the premise that the scope of protection of the present application.

[0057] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0058] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0059] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0060] The embodiments of the present application provide a circuit breaker applied to a vehicle, which will be described in detail below in combination with the drawings.

[0061] As shown in FIGS. 1-6, referring to FIG. 1, a schematic diagram of a structure of a circuit breaker according to an embodiment of the present application is shown. The circuit breaker 1 according to the embodiment of the present application includes: an insulating shell 10; a plurality of conductive plates 20, the plurality of conductive plates 20 are arranged at intervals on the insulating shell 10, and at least two target conductive plates 201 are included in the plurality of conductive plates; and an initiating device 30, the initiating device 30 is arranged on the insulating shell 10, and the initiating device 30 is used to break at least two target conductive plates 201 by a gas flow generated after being initiated.

[0062] Specifically, the insulating shell 10 can be made of any suitable electrically insulating material. The insulating shell 10 is provided with a cavity, and the conductive plate 20 that is broken and deformed after being bent is accommodated in the cavity, so as to avoid the influence of the electric arc generated by the breaking of the conductive plate 20 on the normal work of other components.

[0063] The conductive plate 20 is used to conduct electricity in any direction through the circuit breaker 1. The conductive plate 20 can be broken in the insulating shell 10 to interrupt any current flowing in the conductive plate 20. The conductive plate 20 can be made of any suitable electrically conductive material. In some embodiments, the conductive plate is made of aluminum or copper.

[0064] The plurality of conductive plates 20 are arranged at intervals in the insulating shell 10, and the specific interval can be set according to actual conditions. The conductive plates 20 are at least two, for example, the conductive plates 20 can be 2, 3, 4, etc. The target conductive plate 201 is the conductive plate 20 that needs to be broken among the plurality of conductive plates 20, and the target conductive plate 201 is at least two, for example, the target conductive plate 201 can be 2, 3, 4, etc.

[0065] The initiating device 30 is located in the insulating shell 10, and the initiating device 30 can be located on one side of two adjacent target conductive plates 201 (as shown in FIG. 2), or can be located on one side of two target conductive plates 201 that are not adjacent (as shown in FIG. 7), or can be connected to three adjacent target conductive plates 201. The specific position of the initiating device 30 can be set according to actual conditions. After the initiating device 30 is initiated, the gas flow generated by the explosion can break at least two target conductive plates 201, so as to break the circuit, thereby protecting the safety of the circuit in the vehicle 400 or other electrical equipment.

[0066] In the related art, in order to realize the cutting of the conductive plate 20, a punch is usually arranged between the detonating device 30 and the conductive plate 20. When the detonating device 30 explodes, the impact force drives the punch to move and contact the conductive plate 20. The huge impact force drives the punch to generate a corresponding impact force on the conductive plate 20, thereby cutting the conductive plate. The adjacent two conductive plates 20 and the detonating device 30 have a certain distance to accommodate the punch, so that the volume of the circuit breaker 1 is large. In the embodiment of the present application, the punch structure is cancelled. The airflow generated after the detonating device 30 is detonated directly cuts at least two target conductive plates 201. The target conductive plates 201 can be broken, the volume of the circuit breaker 1 is reduced, and the volume of the power equipment or other devices occupied by the circuit breaker 1 is reduced, thereby improving the space utilization. Moreover, the punch is not required, the structure of the circuit breaker 1 is simpler, and the cost of the circuit breaker 1 is reduced.

[0067] In addition, by arranging the detonating device 30 on one side of the at least two target conductive plates 201, the airflow generated by the detonating device 30 directly cuts at least two target conductive plates 201 in the plurality of conductive plates 20, so that the two conductive plates 20 can be cut at the same time. In a multi-phase circuit, one circuit breaker 1 can cut the multi-phase circuit, thereby eliminating the need to arrange a plurality of circuit breakers 1 to cut the multi-phase circuit, reducing the volume and saving the cost.

[0068] Referring to FIG. 2, a cross-sectional view of a circuit breaker according to an embodiment of the present application is shown. Referring to FIG. 3, a structure diagram of a detonating device of a circuit breaker according to an embodiment of the present application is shown.

[0069] Optionally, the detonating device 30 includes a detonating tube 301. The explosion airflow generated after the detonating device 30 is detonated passes through the detonating tube 301 to cut the target conductive plate 201.

[0070] As shown in FIG. 3, the detonating tube 301 is a tubular hollow structure. The detonating tube 301 is arranged on one side of the target conductive plate 201. The explosion airflow generated after the detonating device 30 is detonated can be guided to the target conductive plate 201 through the detonating tube 301. The explosion airflow directly impacts the target conductive plate 201, so that the target conductive plate 201 is broken, thereby realizing the cutting process of the power circuit.

[0071] In practical application, by setting the detonation tube 301, the explosion airflow generated by the detonation device 30 is conducted to the target conductive plate 201 through the detonation tube 301, on the one hand, the impact force generated by the explosion airflow can be more concentrated to be transmitted to the target conductive plate 201, so that the detonation device 30 can more effectively cut off the target conductive plate 201, and directly through the detonation tube 301 to concentrate the explosion airflow, and then without setting the punch structure, the target conductive plate 201 can be broken, the size of the circuit breaker 1 is reduced, and then the size of the electrical equipment or other devices occupied by the circuit breaker 1 is reduced, and the space utilization is improved.

[0072] As shown in FIG. 2, optionally, the opening of the detonation tube 301 is arranged on one side of the thickness direction of the target conductive plate 201.

[0073] Specifically, the opening of the detonation tube 301 is arranged on one side of the thickness direction of the target conductive plate 201, when the detonation device is detonated, the detonation tube 301 guides the explosion airflow to concentrate on the target conductive plate 201 in the thickness direction of the target conductive plate 201, so that the target conductive plate 201 is broken in the thickness direction, and then without cutting the target conductive plate 201 in the width direction of the target conductive plate 201 by the counter-punch structure, the size of the circuit breaker 1 in the conductive plate arrangement direction is reduced, and then the size of the circuit breaker 1 is reduced. In other words, the target conductive plate 201 is impacted in the thickness direction of the target conductive plate 201, and at least a space for accommodating the impact head is required to be reserved between the two target conductive plates 201, and the target conductive plate 201 is impacted in the width direction of the target conductive plate 201, so that the distance between the two target conductive plates can be reduced, thereby reducing the size of the circuit breaker 1 in the conductive plate arrangement direction.

[0074] As shown in FIG. 2, optionally, the opening of the detonation tube 301 is arranged close to the target conductive plate 201, and has a gap between the target conductive plate 201.

[0075] Specifically, in order to make the detonation tube have enough rigidity to resist the impact airflow generated by the explosion of the detonation device 30, the detonation tube 301 is a metal material, the detonation tube 301 has two ends, and the openings of the two ends are arranged close to the target conductive plate 201, so that the end openings of the detonation tube 301 can be as close to the target conductive plate 201 as possible, the explosion airflow can be more concentrated to be transmitted to the target conductive plate 201, and the cutting efficiency of the circuit breaker 1 is improved.

[0076] Since the conductive plate 20 is made of metal material, and the detonation tube 301 is also made of metal material, in order to ensure that the circuit breaker 1 is in normal operation or fault state, the conductive plate 20 and the detonation tube 301 will have high voltage, and the end of the detonation tube 301 and the weak part 203 of the two target conductive plates 201 need to have a certain distance, which is the creepage distance, which can prevent air breakdown or flashover phenomenon on the surface of the insulating material between the target conductive plate 201 and the detonation tube 301, and ensure the safe operation of the circuit breaker 1.

[0077] Optionally, the detonation device 30 further comprises a detonation element 302, which is arranged at any position between the two openings of the detonation tube 301, and the detonation element 302 is away from the target conductive plate 201 in the thickness direction of the conductive plate relative to the opening.

[0078] Specifically, the detonation element 302 is arranged at any position between the two openings of the detonation tube 301, and the detonation element 302 is away from the target conductive plate 201 in the thickness direction of the conductive plate relative to the opening. That is, the detonation element 302 and the opening of the detonation tube 301 are not arranged in the same horizontal plane. When the detonation element 302 is detonated, the explosion gas flow generated by the detonation element 302 will impact the target conductive plate 201 from the thickness direction of the conductive plate. In the related art, the detonation element and the conductive plate are usually arranged in the width direction of the conductive plate and located in the same horizontal plane, so that the size of the circuit breaker 1 in the width direction is increased. In the embodiment of the present application, the detonation element 302 and the opening of the detonation tube 301 are not arranged in the same horizontal plane. Thus, the size of the circuit breaker 1 in the width direction is reduced, and the volume of the circuit breaker 1 can be reduced.

[0079] As shown in FIG. 4, optionally, the detonation element 302 comprises a charge chamber 3023, an explosive fuel 3022 and a fuse tube 3021; the charge chamber 3023 is located in the detonation tube 301; the fuse tube 3021 is connected to the charge chamber 3023; the explosive fuel 3022 is located in the charge chamber 3023 to detonate the explosive fuel 3022 through the fuse tube 3021. The fuse tube 3021 can be one, two or the like, and the fuse tube 3021 can be connected to an external ignition device. The other end of the fuse tube 3021 is connected to the charge chamber 3023, and the explosive fuel 3022 is encapsulated in the charge chamber 3023. The charge chamber 3023 is located in the detonation tube 301, so that the ignition device can ignite the fuse tube 3021, the fuse tube 3021 detonates the explosive fuel 3022 in the charge chamber 3023, the explosive fuel 3022 generates explosion products, the explosion products are conducted to the target conductive plate 201 through the detonation tube 301, the target conductive plate 201 is broken, and the process of cutting off the power circuit is realized.

[0080] The specific material and kind of the detonating fuel 3022 can be selected according to actual needs, and the embodiments of the present application do not make specific limitations thereon. The structure and material of the charge chamber 3023 and the ignition tube 3021 can be selected according to actual needs, and the embodiments of the present application do not make specific limitations thereon.

[0081] Optionally, the target conductive plate 201 is provided with a weak part 203, and the end opening of the detonation tube 301 is arranged corresponding to the weak part 203.

[0082] Specifically, the weak part 203 refers to a part that is easy to break on the target conductive plate 201, and the weak part 203 is arranged corresponding to the end opening of the detonation tube 301. When the explosion gas flow generated after the explosion of the detonation device 30 flows out from the end opening and impacts on the weak part, the target conductive plate 201 breaks from the weak part. By arranging the weak part 203, the detonation device 30 can more easily cut off the target conductive plate 201.

[0083] Optionally, the detonation tube 301 is configured as an arc-shaped pipeline, and the detonating element 302 is arranged at least partially in the middle of the arc-shaped pipeline, and the two end openings of the arc-shaped pipeline are arranged corresponding to the weak parts 203 of the two target conductive plates 201 respectively.

[0084] As shown in FIGS. 2-4, the detonation tube 301 is an arc-shaped pipeline, which is a hollow structure forming a detonation chamber, and the detonation chamber is an arc-shaped cavity 3011. The two ends of the arc-shaped cavity 3011 correspond to the positions of the weak parts 203 of the two target conductive plates 201 respectively. The arc-shaped cavity 3011 has a better flow guiding effect than a square or the like, and can better guide the explosion gas generated by the detonating element 302 to the weak parts 203, thereby improving the cutting efficiency of the detonating element 302.

[0085] The detonating element 302 is arranged at the middle position of the arc-shaped pipeline, so that the gas flow generated by the detonating element 302 can be uniformly output from the two ports of the detonation tube 301 to the weak parts 203 on the two target conductive plates 201 respectively, so that both of the weak parts 203 have enough impact force to be cut off.

[0086] As shown in FIGS. 3 and 4, optionally, the detonation tube 301 is provided with a detonation through hole 3012 at the middle part; and the detonating element 302 extends into the detonation through hole 3012 and is embedded in the arc-shaped cavity 3011.

[0087] Specifically, the detonation through hole 3012 is arranged at the middle position of the detonation tube 301, the detonation member 302 is inserted into the detonation through hole 3012 and embedded in the arc-shaped cavity 3011, and the explosion products generated by the detonation member 302 can diffuse to the weak part 203 of the target conductive plate 201 through the arc-shaped cavity 3011, so that the target conductive plate 201 is broken, thereby realizing the cutting process of the power circuit. In this embodiment, one detonation member 302 can be arranged to cut off two target conductive plates 201, thereby further reducing the cost of the circuit breaker 1.

[0088] Referring to FIG. 5, a schematic structural diagram of a target conductive plate of a circuit breaker is shown. Optionally, the target conductive plate 201 is provided with a recessed groove 202, the recessed groove 202 is recessed towards the direction away from the detonation tube 301, and the weak part 203 is arranged at the recessed groove 202.

[0089] As shown in FIG. 5, the target conductive plate 201 is provided with a recessed groove 202, the recessed groove 202 is arranged to make the position where the flat part and the recessed part of the target conductive plate 201 are connected have a bending part, and the end of the detonation tube 301 is arranged on the weak part 203 arranged at the recessed groove 202, so that after the detonation member 302 is detonated, the broken part of the target conductive plate 201 can be bent around the bending part after the target conductive plate 201 is cut off at the weak part 203, thereby increasing the distance between the breaking points of the target conductive plate 201 and reducing the strength of the electric arc generated between the breaking points.

[0090] Optionally, the weak part 203 includes at least one cutout, and the cutout is arranged on the other side of the target conductive plate 201 away from the detonation device 30.

[0091] Specifically, the weak part 203 can be a plurality of cutouts, the cutouts can penetrate the target conductive plate 201 in the width direction of the cutouts, and the cutouts can be U-shaped, triangular, etc., so that stress concentration points can be formed on the conductive plate through the cutouts, the strength of the target conductive plate 201 at the position is weakened, the detonation device 30 can correspond to the position of the cutout to make the conductive plate 20 break, and the plurality of cutouts can be one, two, three, etc. The arrangement of the plurality of cutouts can make the detonation device 30 more convenient to cut off the target conductive plate 201.

[0092] Optionally, the insulating shell 10 includes an upper body 101 and a lower body 102, and a plurality of the conductive plates 20 are located between the upper body 101 and the lower body 102.

[0093] In particular, the insulating housing 10 has an upper body 101 and a lower body 102 in this embodiment, and the insulating housing 10 can have different numbers of components in other embodiments. In some embodiments, the insulating housing 10 is made of plastic. For example, the upper body 101 and the lower body 102 can be corresponding injection-molded components.

[0094] The lower body 102 has a receiving cavity inside, in which the target conductive plate 201 is accommodated after being cut off and bent and deformed, so as to avoid the influence of the electric arc generated by cutting off the target conductive plate 201 on the normal work of other components. The upper body 101 is used for mounting the detonating device 30 and other components.

[0095] In actual application, by arranging the insulating housing 10 in a split manner, installation and maintenance are more convenient. The upper body 101 can be opened alone for inspection, cleaning or replacement of internal components without disassembling the entire circuit breaker 1, thereby reducing maintenance cost and downtime.

[0096] Optionally, the detonating device 30 comprises a detonating housing 303, which is mounted on a side of the upper body 101 away from the lower body 102.

[0097] As shown in FIG. 2, the detonating housing 303 is fixedly connected to the upper body 101, and the detonating tube 301 and the detonating member 302 can be wholly or at least partially mounted in the detonating housing 303. Thus, the detonating tube 301 and the detonating member 302 can be fixed and protected by the detonating housing 303, so as to avoid the detonating member 302 from being driven by the impact force generated after being detonated to make the detonating tube 301 fly out of the insulating housing 10 and cause damage to other components, thereby improving the safety of the circuit breaker 1.

[0098] Optionally, the detonating housing 303 further comprises an explosion-proof lug 40 fixedly connected to a side of the upper body 101 away from the lower body 102.

[0099] Specifically, the explosion-proof lug 40 can be fixedly connected to the upper body 101 by screws. The explosion-proof lug 40 is used to prevent the detonating device 30 from being driven by the impact force generated after ignition to make the detonating housing 303 separate from the upper body 101, thereby saving the cost of the circuit breaker 1.

[0100] Optionally, the explosion-proof lug 40 comprises at least two explosion-proof lugs 40 arranged on opposite sides of the detonating housing 303, respectively.

[0101] Specifically, the explosion-proof ears 40 are symmetrically arranged on opposite sides of the detonation shell 303, and the plurality of explosion-proof ears 40 can fix the detonation shell 303 from both sides, so as to avoid the action force generated after the detonation device 30 is ignited from driving the detonation shell 303 to separate from the upper body 101, causing damage to the circuit breaker 1, and further saving the cost of the circuit breaker 1.

[0102] Optionally, the explosion-proof ears 40 are staggered on opposite sides of the detonation shell 303.

[0103] As shown in FIG. 1, specifically, in the case of two explosion-proof ears 40, the two explosion-proof ears are arranged on both sides of the detonation shell 303, and the staggered arrangement means that the two explosion-proof ears 40 are not symmetrically arranged on both sides of the detonation shell 303, and there is a certain distance between the two explosion-proof ears 40. In the embodiment of the present application, by staggering the explosion-proof ears 40, the detonation shell 303 can be fixed by only arranging two explosion-proof ears 40, further saving the cost of the circuit breaker 1.

[0104] Optionally, the detonation shell 303 and the upper body 101 are integrally formed.

[0105] Specifically, the detonation shell 303 can be made of plastic, the upper body 101 can be made of plastic, and the detonation shell 303 can be integrally injection molded with the upper body 101. Since the cost of plastic is low, the cost of the circuit breaker 1 can be further reduced.

[0106] Optionally, the circuit breaker 1 further comprises at least one arc-extinguishing fuse 50, and two ends of the arc-extinguishing fuse 50 are respectively connected to two ends of the target conductive plate 201.

[0107] Specifically, the arc-extinguishing fuse 50 is connected to the upper body 101 and is connected in parallel with the target conductive plate 201, and the arc-extinguishing fuse 50 is used to remove the electric arc generated on the target conductive plate 201; the recessed groove 202 of the target conductive plate 201 is provided with mounting holes of the arc-extinguishing fuse 50, and the two ends of the arc-extinguishing fuse 50 are fixedly connected to the mounting holes through screws, so that the arc-extinguishing fuse 50 can remove the electric arc generated on the target conductive plate 201 when the target conductive plate is cut off, thereby avoiding the damage of the electric arc to other parts of the circuit breaker 1.

[0108] Referring to FIGS. 6-7, FIG. 6 shows a schematic structural diagram of another circuit breaker according to an embodiment of the present application; and FIG. 7 shows a schematic sectional view of still another circuit breaker according to an embodiment of the present application. The specific structure of the circuit breakers shown in FIGS. 6 and 7 is the same as that of the circuit breaker 1 shown in FIG. 1, except that the circuit breaker 1 shown in FIG. 1 is configured to cut off two adjacent target conductive plates 201, while the circuit breakers 1 shown in FIGS. 6 and 7 are configured to cut off two spaced target conductive plates. The structure of other components is described above and will not be repeated here.

[0109] In summary, the circuit breaker according to the embodiments of the present application can have at least the following advantages:

[0110] In the embodiments of the present application, the punch structure is cancelled, and the airflow generated after the detonation of the detonation device 30 directly cuts off the at least two target conductive plates 201, so that the target conductive plates 201 can be broken, while the volume of the circuit breaker 1 is reduced, thereby reducing the volume of the electrical equipment or other devices occupied by the circuit breaker and improving the space utilization. Moreover, the punch is not needed, so that the structure of the circuit breaker is simpler and the cost of the circuit breaker is reduced.

[0111] In a second aspect, the present application further discloses a circuit breaking device 100, as shown in FIGS. 8-10, which comprises: the circuit breaker 1 according to any of the above embodiments; a current sensor 3 connected to the conductive plate 20; and a power device 4 connected to the conductive plate 20; the current sensor 3 is configured to detect the current on the conductive plate 20 to control the detonation of the detonation device 30.

[0112] Specifically, one end of the current sensor 3 is connected to the plurality of conductive plates 20 of the circuit breaker 1, and the other end is connected to the power device 4, which is connected to the conductive plate 20. The specific connection mode can be any fixed connection mode such as bolt connection or welding, and the current sensor 3 can measure the current passing through the power device 4. For example, the current sensor 3 can be a Hall sensor, which can be a magnetic core Hall sensor or a non-magnetic core Hall sensor.

[0113] Specifically, the circuit breaking device 100 further comprises a controller 6 and an actuator 5, the actuator 5 is electrically connected with the current sensor 3, the controller 6 is electrically connected with the actuator 5, and the actuator 5 is connected with the detonator 30 in the circuit breaker 1. The working principle of the circuit breaking device 100 is that the current sensor 3 collects the current signal passing through the power device 4 and sends the current signal to the controller 6, the controller 6 analyzes the current signal and judges whether the conductive plate 20 in the circuit breaker 1 needs to be cut off, when it is judged that the conductive plate 20 needs to be cut off, the controller 6 sends a cut-off signal to the actuator 5, after receiving the cut-off signal, the actuator 5 ignites the detonator 30 in the circuit breaker 1 to cut off the conductive plate 20 in the circuit breaker 1, so that the circuit is disconnected, realizing high-sensitivity monitoring and active cutting of the current and improving the safety performance of the electrical equipment.

[0114] Optionally, the circuit breaking device 100 further comprises a filter 2, and the filter 2 is arranged around the conductive plate 20.

[0115] Specifically, the filter 2 can be a magnetic ring, which is a ring-shaped magnetic conductor. The magnetic ring is sleeved on the plurality of conductive plates 20 of the circuit breaker 1 and can be made of ferrite material. The magnetic ring plays a role of anti-interference. Under the action of the magnetic ring, normal useful signals can pass through well, and high-frequency interference signals can be well inhibited from passing through.

[0116] In another preferred embodiment, the magnetic ring 2 and the insulating shell 10 of the circuit breaker 1 can be integrally formed. The insulating shell 10 of the circuit breaker 1 is a plastic part. The magnetic ring 2 and the circuit breaker 1 are integrally injection molded by fixing the magnetic ring 2 in the model of the insulating shell 10 of the circuit breaker 1 and then injection molding, so that no additional fixing part is needed to install the magnetic ring 2, the cost of the circuit breaking device 100 is reduced, and the structure of the circuit breaking device 100 is simplified.

[0117] It should be noted that the specific structures of the current sensor 3, the power device 4, the filter 2, the controller 6 and the actuator 5 are prior art, and the embodiments of the present application do not make specific limitations thereto.

[0118] It should be noted that in the embodiments of the present application, the structure of the circuit breaker is the same as that of the circuit breaker in any of the above embodiments, and the beneficial effects are similar, which will not be repeated here.

[0119] In a third aspect, the embodiments of the present application further disclose a motor controller 200, as shown in FIG. 11, comprising the circuit breaking device 100 described in the above embodiments, and the power device 4 is configured as a power switch module.

[0120] The power device 4 is configured as a power switch module, which can be a power semiconductor device having both conduction and blocking characteristics, and can control the opening and closing of a circuit in the circuit. The power semiconductor device can be an insulated gate bipolar transistor, a silicon carbide power device, a gallium nitride power device, etc.

[0121] In a fourth aspect, the embodiments of the present application further disclose an electric drive assembly 300, as shown in FIG. 12, comprising the motor controller 200 described in the above embodiments.

[0122] In a fifth aspect, the present application further discloses a vehicle 400, as shown in FIG. 13, comprising the electric drive assembly 300 described in the above embodiments.

[0123] The vehicle 400 can be a new energy vehicle, which can be a pure electric vehicle, a hybrid electric vehicle, or a range extended vehicle, etc.

[0124] It should be noted that in the embodiments of the present application, the structure of the circuit breaking device is the same as that of the circuit breaking device described in any of the above embodiments, and the beneficial effects are similar, which will not be repeated here.

[0125] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0126] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A circuit breaker, wherein, The circuit breaker (1) comprises: an insulating shell (10); a plurality of conductive plates (20) are arranged on the insulating shell (10) in a spaced manner, and at least two target conductive plates (201) are included in the plurality of conductive plates (20); and an igniter (30) arranged on the insulating shell (10), the igniter (30) is used to generate a gas flow after being ignited to break the at least two target conductive plates (201).

2. The circuit breaker of claim 1, wherein, The igniter (30) comprises an ignition tube (301); The explosion gas flow generated after the igniter (30) is ignited passes through the ignition tube (301) to break the target conductive plate (201).

3. The circuit breaker of claim 2, wherein, The opening of the ignition tube (301) is arranged on one side of the thickness direction of the target conductive plate (201).

4. The circuit breaker of claim 2, wherein, The opening of the ignition tube (301) is arranged close to the target conductive plate (201) and has a gap between the target conductive plate (201).

5. The circuit breaker of claim 3, wherein, The igniter (30) further comprises an ignition element (302), which is arranged at any position between the two openings of the ignition tube (301), and the ignition element (302) is away from the target conductive plate (201) relative to the opening in the thickness direction of the conductive plate (20).

6. The circuit breaker of claim 3, wherein, The target conductive plate (201) is provided with a weak part (203), and the end opening of the ignition tube (301) is arranged correspondingly with the weak part (203).

7. The circuit breaker of claim 6, wherein, The ignition tube (301) is configured as an arc-shaped pipeline, the ignition element (302) is at least partially arranged in the middle of the arc-shaped pipeline, and the two end openings of the arc-shaped pipeline are arranged correspondingly with the weak parts (203) of the two target conductive plates (201) respectively.

8. The circuit breaker of claim 7, wherein, The middle part of the ignition tube (301) is provided with an ignition through hole (3012); the ignition element (302) is inserted into the ignition through hole (3012) and embedded in the arc-shaped pipeline.

9. The circuit breaker of claim 6, wherein, The target conductive plate (201) is provided with a recessed groove (202), the recessed groove (202) is recessed in a direction away from the opening of the ignition tube (301), and the weak part (203) is arranged at the recessed groove (202).

10. The circuit breaker of claim 6, wherein, The weak part (203) comprises at least one cutout arranged on the side of the target conductive plate (201) away from the igniter (30).

11. The circuit breaker of claim 1, wherein, The insulating shell (10) comprises an upper body (101) and a lower body (102), and the plurality of conductive plates (20) are located between the upper body (101) and the lower body (102).

12. The circuit breaker of claim 11, wherein, The igniter (30) comprises an ignition shell (303), and the ignition shell (303) is mounted on the side of the upper body (101) away from the lower body (102).

13. The circuit breaker of claim 12, wherein, The side of the ignition shell (303) is further provided with an explosion-proof ear (40); The explosion-proof ear (40) is fixedly connected with the side of the upper body (101) away from the lower body (102).

14. The circuit breaker of claim 13, wherein, The explosion-proof ears (40) are arranged on opposite sides of the detonation housing (303).

15. The circuit breaker of claim 14, wherein, The explosion-proof ears (40) are arranged on opposite sides of the detonation housing (303).

16. The circuit breaker of claim 12, wherein, The detonation housing (303) and the upper body (101) are integrally formed.

17. The circuit breaker of any one of claims 1-16, wherein, The circuit breaker (1) further comprises at least one arc-extinguishing fuse (50), two ends of the arc-extinguishing fuse (50) being connected to two ends of the target conductive plate (201) respectively.

18. A circuit breaking device wherein, The circuit breaking device comprises: The circuit breaker (1) according to any one of claims 1-17; a current sensor (3) connected to the conductive plate (20); and a power device (4) connected to the conductive plate (20); The current sensor (3) is configured to detect a current on the conductive plate (20) to control detonation of the detonation device (30).

19. The disconnect device of claim 18, wherein, The circuit breaking device further comprises a filter (2) arranged around the conductive plate (20).

20. An electric machine controller, wherein, The circuit breaking device (100) according to claim 18 or 19, wherein the power device (4) is configured as a power switch module.

21. An electric drive assembly, wherein, The motor controller (200) according to claim 20.

22. A vehicle, wherein, The electric drive assembly (300) according to claim 21.

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