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

Abstract

The embodiment of the invention provides a circuit breaker, a circuit breaking device, a motor controller, an electric drive assembly and a vehicle. The circuit breaker comprises: an insulating housing; the plurality of current-conducting plates are arranged on the insulating shell at intervals, and the plurality of current-conducting plates comprise at least two target current-conducting plates; and the detonating device is arranged on the insulating shell, and the detonating device is used for thrusting the at least two target conductive plates through airflow generated after the detonating device is detonated. The circuit breaker is small in size and low in cost.

Description

Technical Field

[0001] The present application belongs to the technical field of circuit breakers, and specifically relates to a circuit breaker, a circuit breaker device, a motor controller, an electric drive assembly and a vehicle. Background Art

[0002] 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 to the battery pack and the drive motor through circuits. The motor controller converts the electric energy stored in the battery pack into the electric energy required by the drive motor to enable the electric vehicle to travel. During the driving of an electric vehicle, short circuits, collisions and other events may occur, causing large currents in the connected circuits, causing damage to the motor controller, battery pack and motor.

[0003] In the related art, a circuit breaker is usually connected in the circuit. The circuit breaker usually includes a conductive plate and a detonating device. The conductive plate is electrically connected to the circuit. The detonating device can cut off the conductive plate, thereby disconnecting the circuit 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 relatively large. Summary of the invention

[0004] The present application aims to provide a circuit breaker, a circuit breaker device, a motor controller, an electric drive assembly and a vehicle to solve the problem of large space volume of existing circuit breakers.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, the present application discloses a circuit breaker, the circuit breaker comprising:

[0007] Insulating housing;

[0008] A plurality of conductive plates, the plurality of conductive plates are arranged on the insulating housing at intervals, and at least two target conductive plates are included in the plurality of conductive plates;

[0009] and a detonating device, wherein the detonating device is arranged on the insulating shell and is used for breaking the at least two target conductive plates by the airflow generated by the detonating device after being detonated.

[0010] Optionally, the detonation device comprises a detonation tube;

[0011] The explosive airflow generated by the detonation device after being detonated passes through the detonation tube to break the target conductive plate.

[0012] Optionally, the opening of the detonator is arranged on one side in the thickness direction of the target conductive plate.

[0013] Optionally, the opening of the detonator is arranged close to the target conductive plate, and there is a gap between the opening of the detonator and the target conductive plate.

[0014] Optionally, the detonating device further comprises a detonating member, wherein the detonating member is disposed at any position between the two openings of the detonating tube, and the detonating member is away from the target conductive plate relative to the opening in the thickness direction of the conductive plate.

[0015] Optionally, a weak portion is provided on the target conductive plate, and the end opening of the detonator tube is arranged corresponding to the weak portion.

[0016] Optionally, the detonator is constructed as an arc-shaped pipe, the detonator is at least partially arranged in the middle of the arc-shaped pipe, and the openings at both ends of the arc-shaped pipe are respectively arranged corresponding to the weak parts of the two target conductive plates.

[0017] Optionally, a detonation through hole is provided in the middle of the detonation tube; the detonating member extends into the detonation through hole and is embedded in the arc-shaped pipe.

[0018] Optionally, the target conductive plate is provided with a recessed groove, the recessed groove is recessed in a direction away from the opening of the detonator, and the weak portion is arranged at the recessed groove.

[0019] Optionally, the weak portion includes at least one cutout, and the cutout is arranged on a side of the target conductive plate away from the detonation device.

[0020] Optionally, the insulating shell includes: an upper body and a lower body, and the plurality of conductive plates are located between the upper body and the lower body.

[0021] Optionally, the detonating device includes a detonating shell, and the detonating shell is installed on a side of the upper body away from the lower body.

[0022] Optionally, the detonation shell is also provided with explosion-proof ears on the side;

[0023] The explosion-proof ear is fixedly connected to a surface of the upper body away from the lower body.

[0024] Optionally, the explosion-proof ears include at least two,

[0025] The explosion-proof ears are respectively arranged on two opposite sides of the detonation shell.

[0026] Optionally, the explosion-proof ears are staggeredly arranged on two opposite sides of the detonation shell.

[0027] Optionally, the detonation shell and the upper body are an integrally formed part.

[0028] Optionally, the circuit breaker further comprises at least one arc extinguishing fuse, and two ends of the arc extinguishing fuse are respectively connected to two ends of the target conductive plate.

[0029] In a second aspect, the present application further discloses a circuit breaker device, the circuit breaker device comprising:

[0030] A circuit breaker as described in any one of the above items;

[0031] a current sensor connected to the conductive plate;

[0032] and an electric device connected to the conductive plate;

[0033] The current sensor is used to detect the current on the conductive plate to control the detonation of the detonation device.

[0034] Optionally, the circuit breaker device further comprises a filter, and the filter is arranged around the conductive plate.

[0035] In a third aspect, the present application further discloses a motor controller, comprising the circuit breaker device described above, wherein the power device is configured as a power switch module.

[0036] In a fourth aspect, the present application also discloses an electric drive assembly, including the motor controller described above.

[0037] In a fifth aspect, the present application also discloses a vehicle, comprising the electric drive assembly described above.

[0038] In the embodiment of the present application, since the circuit breaker includes: a detonating device, the detonating device is arranged on the insulating shell, and the detonating device is used to generate an airflow after being detonated to break the at least two target conductive plates. In this way, by allowing the airflow after the detonating device is detonated to directly break the at least two conductive plates, there is no need to set a punch in the circuit breaker, thereby reducing the spatial volume of the circuit breaker, and there is no need to set a punch, so that the structure of the circuit breaker is simpler and the cost of the circuit breaker is reduced.

[0039] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0041] Figure 1 is a structural schematic diagram of a circuit breaker described in an embodiment of the present application;

[0042] Figure 2is a cross-sectional schematic diagram of a circuit breaker described in an embodiment of the present application;

[0043] Figure 3 It is a structural schematic diagram of a detonation device of a circuit breaker provided in an embodiment of the present application;

[0044] Figure 4 is a cross-sectional schematic diagram of a detonating device of a circuit breaker provided in an embodiment of the present application;

[0045] Figure 5 is a schematic structural diagram of a target conductive plate of a circuit breaker provided in an embodiment of the present application;

[0046] Figure 6 is a structural schematic diagram of another circuit breaker provided in an embodiment of the present application;

[0047] Figure 7 is a cross-sectional schematic diagram of another circuit breaker provided in an embodiment of the present application;

[0048] Figure 8 is a structural schematic diagram of a circuit breaker device provided in an embodiment of the present application;

[0049] Fig. 9 It is a schematic diagram of the structural decomposition of a circuit breaker device provided in an embodiment of the present application;

[0050] Fig.10 It is a connection diagram of a circuit breaker device provided in an embodiment of the present application.

[0051] Figure numerals: 10, shell; 101, upper body; 102, lower body; 20, conductive plate; 201, target conductive plate; 202, recessed groove; 203, weak part; 30-detonating device; 301, detonating tube; 3011, arc-shaped cavity; 3012, detonating through hole; 302, detonating piece; 3021, ignition tube; 3022, detonating fuel; 3023, charging chamber; 303, detonating shell; 40, explosion-proof ear; 50, arc-extinguishing insurance; 1, circuit breaker; 2, filter; 3, current sensor; 4, power device; 5, actuator; 6, controller. DETAILED DESCRIPTION

[0052] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0053] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means 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 objects connected before and after are in an "or" relationship.

[0054] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0055] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be 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 this application can be understood according to specific circumstances.

[0056] An embodiment of the present application provides a circuit breaker, which is applied to a vehicle. The circuit breaker of the present application is described in detail below with reference to the accompanying drawings.

[0057] like Figure 1 - Figure 6 As shown, refer to Figure 1 , showing a schematic structural diagram of a circuit breaker described in an embodiment of the present application; an embodiment of the present application discloses a circuit breaker, the circuit breaker comprising: an insulating shell 10; a plurality of conductive plates 20, the plurality of conductive plates 20 are arranged on the insulating shell 10 at intervals, and there are at least two target conductive plates 201 among the plurality of conductive plates; and a detonating device 30, the detonating device 30 is arranged on the insulating shell 10, and the detonating device 30 is used to break at least two of the target conductive plates 201 by the airflow generated after being detonated.

[0058] Specifically, the insulating housing 10 can be made of any suitable electrically insulating material. A cavity is provided in the insulating housing 10, and the bent and deformed conductive plate 20 after being cut is accommodated in the cavity to prevent the arc generated by the cutting of the conductive plate 20 from affecting the normal operation of other components.

[0059] The conductive plate 20 is used to conduct electricity in any direction through the circuit breaker. The conductive plate 20 can be cut inside the insulating housing 10 to interrupt any current flowing in the conductive plate 20. The conductive plate 20 can be made of any suitable conductive material. In some embodiments, the conductive plate is made of aluminum or copper.

[0060] A plurality of conductive plates 20 are arranged in the insulating housing 10 at a certain interval, and the specific interval can be set according to the actual situation. There are at least two conductive plates 20, and illustratively, there can be 2, 3, 4, etc. The target conductive plate 201 is the conductive plate 20 that needs to be cut off among the plurality of conductive plates 20, and there are at least two target conductive plates 201, and illustratively, there can be 2, 3, 4, etc.

[0061] The detonating device 30 is located in the insulating housing 10, and the detonating device 30 can be located on one side of two adjacent target conductive plates 201 (such as Figure 2 ), or may be located on one side of two non-adjacent target conductive plates 201 (as shown in Figure 7 As shown in FIG. 1 ), it can also be connected to three adjacent target conductive plates 201. The specific setting can be made according to the actual situation. After the detonating device 30 is detonated, the airflow generated by the explosion can cause at least two target conductive plates 201 to be broken, thereby cutting off the circuit, thereby protecting the circuit safety in the vehicle or other electrical equipment.

[0062] In the related art, in order to achieve the cutting of the conductive plate 20, a punch is usually set between the detonating device 30 and the conductive plate 20. When the detonating device 30 explodes, the impact force will drive the punch to move and contact the conductive plate 20. The huge impact force will drive the impact head to generate a corresponding impact force on the conductive plate 20, thereby cutting off the conductive plate. There is a certain distance between the two adjacent conductive plates 20 and the detonating device 30 to accommodate the punch, which makes the volume of the circuit breaker larger. In the embodiment of the present application, the punch structure is cancelled, and the airflow after the detonating device 30 is detonated directly breaks at least two target conductive plates 201. While the target conductive plates 201 can be broken, 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 rate. In addition, there is no need to set a punch, which makes the structure of the circuit breaker simpler and reduces the cost of the circuit breaker.

[0063] In addition, by locating the detonating device 30 on one side of at least two target conductive plates 201, and by directly using the airflow generated by the detonating device 30 to break at least two target conductive plates 201 among the multiple conductive plates 20, it is possible to cut off two conductive plates 20 at the same time, so that in a multi-phase circuit, one circuit breaker can break the multi-phase circuit, and there is no need to set up multiple circuit breakers to break the multi-phase circuit, thereby reducing the volume and saving costs.

[0064] Reference Figure 2 , showing a cross-sectional schematic diagram of a circuit breaker according to an embodiment of the present application, referring to Figure 3 , shows a schematic structural diagram of a detonating device for a circuit breaker provided in an embodiment of the present application.

[0065] Optionally, the detonating device 30 includes a detonating tube 301 ; after the detonating device 30 is detonated, an explosion airflow generated passes through the detonating tube 301 to break the target conductive plate 201 .

[0066] like Figure 3 As shown, the detonating tube 301 is a tubular hollow structure, and the detonating tube 301 is arranged on one side of the target conductive plate 201. The explosive airflow generated by the detonating device 30 after being detonated can be guided to the target conductive plate 201 through the detonating tube 301. The explosive airflow directly impacts the target conductive plate 201, causing the target conductive plate 201 to break, thereby realizing the cutting off process of the power circuit.

[0067] In actual application, by setting the detonating tube 301, the explosion airflow generated by the detonating device 30 is transmitted to the target conductive plate 201 through the detonating tube 301. On the one hand, the impact force generated by the explosion airflow can be more concentratedly transmitted to the target conductive plate 201, so that the detonating device 30 can more effectively cut off the target conductive plate 201, and directly concentrate the explosion airflow through the detonating tube 301, and then the target conductive plate 201 can be broken without setting a punch structure, thereby reducing the volume of the circuit breaker 1, and then reducing the volume of the electrical equipment or other devices occupied by the circuit breaker, thereby improving space utilization.

[0068] like Figure 2 As shown, optionally, the opening of the detonator 301 is arranged on one side of the target conductive plate 201 in the thickness direction.

[0069] Specifically, the opening of the detonator 301 is set on one side in the thickness direction of the target conductive plate 201. When the detonator is detonated, the detonator 301 guides the explosion airflow to concentrate on the target conductive plate 201 in the thickness direction, so that the target conductive plate 201 is broken in the thickness direction, and there is no need to cut the target conductive plate 201 through the hedging structure in the width direction of the target conductive plate 201, thereby reducing the size of the circuit breaker in the conductive plate arrangement direction, thereby reducing the volume of the circuit breaker. In other words, when the target conductive plate 201 is impacted in the back direction along its own thickness direction, it is necessary to reserve at least a space for the impact head between the two target conductive plates 201, while when the target conductive plate 201 is impacted in the width direction, the distance between the two target conductive plates can be reduced, thereby reducing the size of the circuit breaker in the conductive plate arrangement direction.

[0070] like Figure 2 As shown, optionally, the opening of the detonator 301 is arranged close to the target conductive plate 201 , and there is a gap between the opening of the detonator 301 and the target conductive plate 201 .

[0071] Specifically, in order to make the detonator tube have sufficient rigidity to resist the impact airflow generated by the explosion of the detonator device 30, the detonator tube 301 is made of metal material, and the detonator tube 301 has two ends. The openings of the two ends are arranged close to the target conductive plate 201, so that the end openings of the detonator tube 301 can be as close to the target conductive plate 201 as possible, and the explosion airflow can be transmitted to the target conductive plate 201 in a more concentrated manner, thereby improving the cutting efficiency of the circuit breaker 1.

[0072] Since the conductive plate 20 is made of metal material and the detonating tube 301 is also made of metal material, in order to ensure that the circuit breaker is in normal working or fault state, the conductive plate 20 and the detonating tube 301 will carry high voltage, and there needs to be a certain distance between the end of the detonating tube 301 and the weak part 203 of the two target conductive plates 201. The distance is the creepage distance. The creepage distance can prevent air breakdown or flashover on the surface of the insulating material from occurring in the gap between the target conductive plate 201 and the detonating tube 301, thereby ensuring the safe operation of the circuit breaker.

[0073] Optionally, the detonating device 30 further includes a detonating member 302 , which is disposed at any position between the two openings of the detonating tube 301 , and the detonating member 302 is away from the target conductive plate 201 relative to the opening in the thickness direction of the conductive plate.

[0074] Specifically, the detonator 302 is arranged at any position of the two openings of the detonator tube 301, and the relative opening of the detonator 302 is far away from the target conductive plate 201 in the thickness direction of the conductive plate. In other words, the detonator 302 and the opening of the detonator tube 301 are not arranged in the same horizontal plane. When the detonator 302 is detonated, the explosive airflow generated will impact the target conductive plate 201 from the thickness direction of the conductive plate. In the related art, the detonator and the conductive plate are usually arranged in the width direction of the conductive plate and are located on the same horizontal plane, so that the size of the circuit breaker in the width direction of the conductive plate is increased. In the embodiment of the present application, the detonator 302 and the opening of the detonator tube 301 are not arranged in the same horizontal plane. In this way, the size of the circuit breaker in the width direction is reduced, and the volume of the circuit breaker can be reduced.

[0075] like Figure 4 As shown, optionally, the detonating component 302 includes: a charging chamber 3023, an ignition fuel 3022 and an ignition tube 3021; ​​the charging chamber 3023 is located in the ignition tube 301; the ignition tube 3021 is connected to the charging chamber 3023; the ignition fuel 3022 is located in the charging chamber 3023, so as to ignite the ignition fuel 3022 through the ignition tube 3021. The ignition tube 3021 can be one or two, etc. The ignition tube 3021 can be connected to an external ignition device, and the other end of the ignition tube 3021 is connected to the charging chamber 3023, in which the detonation fuel 3022 is packaged. The charging chamber 3023 is located in the detonation tube 301, so that the ignition tube 3021 can be ignited by the ignition device, and the ignition tube 3021 detonates the detonation fuel 3022 in the charging chamber 3023, and the detonation fuel 3022 produces explosion products, which are conducted to the target conductive plate 201 through the detonation tube 301, so that the target conductive plate 201 is broken, thereby realizing the cutting process of the power circuit.

[0076] The specific material and type of the detonation fuel 3022 can be selected according to actual needs, and the present embodiment does not specifically limit this. The structure and material of the charge chamber 3023 and the ignition tube 3021 can be selected according to actual needs, and the present embodiment does not specifically limit this.

[0077] Optionally, a weak portion 203 is provided on the target conductive plate 201 , and an end opening of the detonator 301 is arranged corresponding to the weak portion 203 .

[0078] Specifically, the weak portion 203 refers to a portion on the target conductive plate 201 that is easily broken. The weak portion 203 is arranged corresponding to the end opening of the detonating tube 301. When the detonating device 30 explodes, the explosion airflow generated flows out from the end opening and impacts the weak portion, and the target conductive plate 201 breaks from the weak portion. By setting the weak portion 203, the detonating device 30 can more easily cut off the target conductive plate 201.

[0079] Optionally, the detonating tube 301 is constructed as an arc-shaped pipe, the detonating member 302 is at least partially disposed in the middle of the arc-shaped pipe, and the openings at both ends of the arc-shaped pipe are respectively disposed corresponding to the weak portions 203 of the two target conductive plates 201 .

[0080] like Figure 2 - Figure 4 As shown, the detonator tube 301 is an arc-shaped pipe, which is a hollow structure. The hollow structure forms a detonator chamber, which 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 drainage effect compared to a square shape, and can better drain the explosion gas generated by the detonator 302 to the weak part 203, thereby improving the cutting efficiency of the detonator 302.

[0081] The detonator 302 is arranged in the middle of the arc-shaped pipe, so that the airflow generated by the detonator 302 can be evenly output from the two ports of the detonator tube 301 to the weak parts 203 on the two target conductive plates 201, so that both weak parts 203 have sufficient impact force to be cut off.

[0082] Such as 3 and Figure 4 As shown, optionally, a detonating through hole 3012 is provided in the middle of the detonating tube 301 ; the detonating member 302 extends into the detonating through hole 3012 and is embedded in the arc-shaped cavity 3011 .

[0083] Specifically, the detonation through hole 3012 is set in the middle of the detonation tube 301, and the detonating member 302 extends into the detonation through hole 3012 and is embedded in the arc-shaped cavity 3011. The explosion product generated by the detonating member 302 can diffuse to the weak portion 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 process of cutting off the power circuit. In this embodiment, two target conductive plates 201 can be cut off by setting a detonating member 302, thereby further reducing the cost of the circuit breaker 1.

[0084] Reference Figure 5 , shows a schematic structural diagram of a target conductive plate 201 of a circuit breaker provided in an embodiment of the present application. Optionally, the target conductive plate 201 is provided with a recessed groove 202, the recessed groove 202 is recessed in a direction away from the detonator 301, and the weak portion 203 is arranged at the recessed groove 202.

[0085] like Figure 5As shown, a recessed groove 202 is provided on the target conductive plate 201. The setting of the recessed groove 202 makes the position where the straight part and the recessed part on the target conductive plate 201 are connected have an easy-to-bend part. The end of the detonating tube 301 is set on the weak part 203 set at the recessed groove 202. Therefore, after the detonating element 302 is detonated, after the target conductive plate 201 is cut off at the weak part 203, the disconnected part can be bent around the easy-to-bend part, thereby increasing the distance between the breakpoints of the target conductive plate 201 and reducing the intensity of the arc generated between the breakpoints.

[0086] Optionally, the weak portion 203 includes at least one cutout, and the cutout is disposed on the other side of the target conductive plate 201 away from the detonating device 30 .

[0087] Specifically, the weak portion 203 may be a plurality of cuts, and the cuts may penetrate the target conductive plate 201 in its width direction. The cuts may be U-shaped, triangular, etc., so that a stress concentration point may be formed on the conductive plate through the cuts to weaken the strength of the target conductive plate 201 at that location. The detonating device 30 may correspond to the position of the cuts to break the conductive plate 20. The plurality of cuts may be 1, 2, 3, etc. The setting of the plurality of cuts may make it more convenient for the detonating device 30 to cut off the target conductive plate 201.

[0088] Optionally, the insulating shell 10 includes 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 .

[0089] Specifically, the insulating housing 10 has an upper body 101 and a lower body 102. In other embodiments, the housing may have a different number of components. In some embodiments, the housing is made of plastic. For example, the upper body 101 and the lower body 102 may be corresponding injection molded components.

[0090] The lower body 102 has a receiving cavity inside, and the target conductive plate 201 bent and deformed after being cut is accommodated in the cavity to prevent the arc generated by the cutting of the target conductive plate 201 from affecting the normal operation of other components. The upper body 101 is used to install the detonator 30 and other components.

[0091] In actual applications, the insulating housing 10 is divided into two parts, which makes installation and maintenance more convenient. The upper body 101 can be opened separately for inspection, cleaning or replacement of internal components without disassembling the entire circuit breaker, thereby reducing maintenance costs and downtime.

[0092] Optionally, the detonating device 30 includes a detonating shell 303 , and the detonating shell 303 is installed on a side of the upper body 101 away from the lower body 102 .

[0093] like Figure 2 As shown, the detonating shell 303 is fixedly connected to the upper body 101, and the detonating tube 301 and the detonating member 302 can be completely or at least partially installed in the detonating shell 303, and then the detonating tube 301 and the detonating member 302 can be fixed and protected by the detonating shell 303, so as to prevent the detonating tube 301 from flying out of the insulating shell 10 due to the impact force generated by the detonating member 302 after being detonated, thereby damaging other components. The safety of the circuit breaker is improved.

[0094] Optionally, an explosion-proof ear 40 is further provided on a side of the detonation shell 303 ; the explosion-proof ear 40 is fixedly connected to a surface of the upper body 101 away from the lower body 102 .

[0095] Specifically, the explosion-proof ear 40 can be fixedly connected to the upper body 101 by screws. The explosion-proof ear 40 is used to prevent the 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, thereby saving the cost of the circuit breaker.

[0096] Optionally, the explosion-proof ears 40 include at least two, and the explosion-proof ears 40 are respectively arranged on two opposite sides of the detonation shell 303 .

[0097] Specifically, the explosion-proof ears 40 are symmetrically arranged on the opposite sides of the detonating shell 303. The multiple explosion-proof ears 40 can fix the detonating shell 303 from both sides to prevent the force generated after the detonating device 30 is ignited from driving the detonating shell 303 to separate from the upper body 101, causing damage to the circuit breaker, thereby further saving the cost of the circuit breaker.

[0098] Optionally, the explosion-proof ears 40 are staggeredly arranged on two opposite sides of the detonation shell 303 .

[0099] like Figure 1 As shown, specifically, in the case where there are two explosion-proof ears 40, the two explosion-proof ears are respectively arranged on both sides of the detonating shell 303, and the staggered arrangement means that the two explosion-proof ears 40 are not symmetrically arranged on both sides of the detonating shell 303, and there is a certain distance between the two explosion-proof ears. In the embodiment of the present application, by staggering the explosion-proof ears, only two explosion-proof ears 40 are required to fix the detonating shell 303, thereby further saving the cost of the circuit breaker.

[0100] Optionally, the detonation shell 303 and the upper body 101 are integrally formed.

[0101] Specifically, the detonating shell 303 can be made of plastic, the upper body 101 can be made of plastic, and the detonating shell 303 can be integrally injection molded with the upper body 101. Since the cost of plastic is relatively low, the cost of the circuit breaker can be further reduced.

[0102] Optionally, the circuit breaker further includes 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 .

[0103] Specifically, the arc extinguishing fuse 50 is connected to the upper body 101 and is connected in parallel with the target conductive plate 201. The arc extinguishing fuse 50 is used to remove the arc generated on the target conductive plate 201. Mounting holes for the arc extinguishing fuse 50 are provided on both sides of the recessed groove 202 of the target conductive plate 201. Both ends of the arc extinguishing fuse 50 are fixedly connected to the mounting holes by screws. The arc extinguishing fuse 50 can remove the arc generated on the target conductive plate 201 when the target conductive plate is cut off, thereby avoiding damage to other parts of the circuit breaker caused by the arc.

[0104] See also Figure 6-7 , Figure 6 A schematic structural diagram of another circuit breaker according to an embodiment of the present application is shown; Figure 7 A cross-sectional schematic diagram of another circuit breaker described in an embodiment of the present application is shown; its specific structure is similar to that of the present application Figure 1 The same as the circuit breaker shown, except that Figure 1 The circuit breaker in the embodiment cuts off two adjacent target conductive plates 201. Figure 6 and Figure 7 The target conductive plates of the two separated circuit breakers are cut off. The structures of other components are specifically described in the above discussion and will not be described in detail here.

[0105] In summary, the circuit breaker described in the embodiment of the present application may at least include the following advantages:

[0106] In the embodiment of the present application, the punch structure is eliminated, and the airflow after the detonation device 30 is detonated directly breaks at least two target conductive plates 201, which can break the target conductive plates 201 and reduce the volume of the circuit breaker 1, thereby reducing the volume of the electrical equipment or other devices occupied by the circuit breaker, thereby improving the space utilization rate. In addition, there is no need to set a punch, which makes the structure of the circuit breaker simpler and reduces the cost of the circuit breaker.

[0107] In a second aspect, the present application also discloses a circuit breaker device, see Figure 8 -10, the circuit breaker device includes: the circuit breaker 1 described in any of the above embodiments; a current sensor 3, the current sensor 3 is connected to the conductive plate 20; and an electric device 4, the electric device 4 is connected to the conductive plate 20; the current sensor 3 is used to detect the current on the conductive plate 20 to control the detonation of the detonation device 30.

[0108] 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, and the power device 4 is connected to the conductive plate 20. The specific connection method can be any fixed connection method such as bolt connection and welding, and the current sensor 3 can measure the current passing through the power device 4. Exemplarily, the current sensor 3 can be a Hall sensor, and the Hall sensor can be a Hall sensor with a magnetic core or a Hall sensor without a magnetic core.

[0109] Specifically, the circuit breaker device further includes a controller 6 and an actuator 5, the actuator 5 is electrically connected to the current sensor 3, the controller 6 is electrically connected to the actuator 5, and the actuator 5 is connected to the detonating device 30 in the circuit breaker 1. The working principle of the circuit breaker device is as follows: the current sensor 3 collects the current signal of the electric device 4 and sends the current signal to the controller 6, the controller 6 analyzes the current signal and determines whether it is necessary to cut off the conductive plate 20 in the circuit breaker 1. When it is determined 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 and detonates the detonating device 30 in the circuit breaker 1, cuts off the conductive plate 20 in the circuit breaker 1, and disconnects the circuit, thereby realizing high-sensitivity monitoring and active cut-off of the current, and improving the safety performance of the electrical equipment.

[0110] Optionally, the circuit breaker device further includes a filter 2 , and the filter 2 is arranged around the conductive plate 20 .

[0111] Specifically, the filter 2 can be a magnetic ring, which is a ring-shaped magnetic conductor. The magnetic ring is mounted on multiple conductive plates 20 of the circuit breaker 1 and can be made of ferrite material. The magnetic ring plays an anti-interference role. Under the action of the magnetic ring, normal and useful signals can pass well, and high-frequency interference signals can be well suppressed.

[0112] 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 is fixed in the insulating shell 10 model of the circuit breaker 1 and the magnetic ring 2 and the circuit breaker 1 are integrally injection molded by injection molding, thereby eliminating the need for additional fixings to install the magnetic ring 2, thereby reducing the cost of the circuit breaker device and simplifying the structure of the circuit breaker device.

[0113] 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 arts, and the embodiments of the present application do not specifically limit them.

[0114] It should be noted that in the embodiment of the present application, the structure of the circuit breaker is the same as the structure of the circuit breaker described in any of the above embodiments, and its beneficial effects are also similar, which will not be repeated here.

[0115] In a third aspect, an embodiment of the present application further discloses a motor controller, comprising the circuit breaker device described in the above embodiment, wherein the power device 4 is configured as a power switch module.

[0116] The power device 4 is configured as a power switch module, which can be a power semiconductor device. The power semiconductor device has two working characteristics of conduction and blocking, and can control the circuit opening and closing 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.

[0117] In a fourth aspect, an embodiment of the present application further discloses an electric drive assembly, including the motor controller described in the above embodiment.

[0118] In a fifth aspect, the present application also discloses a vehicle, comprising the electrical equipment described in the above embodiment or the electric drive assembly described in the above embodiment.

[0119] The vehicle can be a new energy vehicle, which can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.

[0120] It should be noted that in the embodiment of the present application, the structure of the circuit breaker device is the same as the structure of the circuit breaker device described in any of the above embodiments, and its beneficial effects are also similar, which will not be repeated here.

[0121] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", 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 this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0122] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A circuit breaker, characterized in that The circuit breaker comprises: Insulating housing; a plurality of conductive plates, the plurality of conductive plates being arranged on the insulating housing at intervals, and at least two target conductive plates being among the plurality of conductive plates; and The detonating device is arranged on the insulating shell and is used for breaking the at least two target conductive plates by the airflow generated by the detonating device after being detonated.

2. The circuit breaker according to claim 1, characterized in that: The detonation device comprises a detonation tube; The explosive airflow generated by the detonation device after being detonated passes through the detonation tube to break the target conductive plate.

3. The circuit breaker according to claim 2, characterized in that: The opening of the detonator is arranged on one side of the target conductive plate in the thickness direction.

4. The circuit breaker according to claim 2, characterized in that: The opening of the detonator is arranged close to the target conductive plate, and there is a gap between the opening of the detonator and the target conductive plate.

5. The circuit breaker according to claim 3, characterized in that: The detonating device further comprises a detonating member, which is arranged at any position between the two openings of the detonating tube, and the detonating member is away from the target conductive plate relative to the opening in the thickness direction of the conductive plate.

6. The circuit breaker according to claim 3, characterized in that: The target conductive plate is provided with a weak portion, and the end opening of the detonator tube is arranged corresponding to the weak portion.

7. The circuit breaker according to claim 6, characterized in that: The detonating tube is constructed as an arc-shaped pipe, the detonating member is at least partially arranged in the middle of the arc-shaped pipe, and the openings at both ends of the arc-shaped pipe are respectively arranged corresponding to the weak parts of the two target conductive plates.

8. The circuit breaker according to claim 7, characterized in that: A detonation through hole is arranged in the middle of the detonation tube; the detonation component extends into the detonation through hole and is embedded in the arc-shaped pipe.

9. The circuit breaker according to claim 6, characterized in that: The target conductive plate is provided with a recessed groove, the recessed groove is recessed in a direction away from the opening of the detonator, and the weak portion is arranged at the recessed groove.

10. The circuit breaker according to claim 6, characterized in that The weak portion includes at least one cutout, and the cutout is arranged on a side of the target conductive plate that is away from the detonating device.

11. The circuit breaker according to claim 1, characterized in that: The insulating shell includes an upper body and a lower body, and the plurality of conductive plates are located between the upper body and the lower body.

12. The circuit breaker according to claim 11, characterized in that The detonating device comprises a detonating shell, and the detonating shell is installed on a side of the upper body away from the lower body.

13. The circuit breaker according to claim 12, characterized in that: The side of the detonation shell is also provided with explosion-proof ears; The explosion-proof ear is fixedly connected to a surface of the upper body away from the lower body.

14. The circuit breaker according to claim 13, characterized in that The explosion-proof ears include at least two, and the explosion-proof ears are respectively arranged on two opposite sides of the detonation shell.

15. The circuit breaker according to claim 14, characterized in that The explosion-proof ears are staggeredly arranged on two opposite sides of the detonation shell.

16. The circuit breaker according to claim 12, characterized in that The detonation shell and the upper body are an integrally formed part.

17. The circuit breaker according to any one of claims 1 to 16, characterized in that: The circuit breaker further comprises at least one arc extinguishing fuse, and two ends of the arc extinguishing fuse are respectively connected to two ends of the target conductive plate.

18. A circuit breaker device, characterized in that: The circuit breaker device comprises: The circuit breaker according to any one of claims 1 to 17; a current sensor connected to the conductive plate; and An electric device connected to the conductive plate; The current sensor is used to detect the current on the conductive plate to control the detonation of the detonation device.

19. The circuit breaker device according to claim 18, characterized in that: The circuit breaker device further comprises a filter, and the filter is arranged around the conductive plate.

20. A motor controller, characterized in that: The circuit breaker device according to claim 18 or 19, wherein the power device is configured as a power switch module.

21. An electric drive assembly, characterized in that: Includes the motor controller as claimed in claim 20.

22. A vehicle, characterized in that: Includes the electric drive assembly as described in claim 21.

Images