Protector and vehicle

Abstract

The utility model relates to a protector and a vehicle, the protector is used for realizing protection between a motor and a driving circuit thereof, and the protector comprises a flow guide body, a first sensor and a flow cutoff device; the conductor is used for transmitting current; the first sensor is used for detecting intrinsic parameters of the electric conductor; the cutoff device is configured to cut off the electric conductor when the intrinsic parameter meets a preset condition. According to the protector disclosed by the embodiment of the invention, the use state of the conductor is directly detected, and the conductor is cut off by the cutoff device when the conductor is used abnormally, so that the cut-off control of the conductor does not depend on the intervention of judging whether the use state of other external equipment is abnormal or not; therefore, current transmission can be cut off in time when the conductor is abnormal, and the use safety of the conductor is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of electronic technology, and in particular, to a protector and a vehicle. BACKGROUND

[0002] Currently, for the electrical equipment such as motor on the vehicle, a driving circuit is often used to control the current flowing to the equipment, and a cutout is arranged between the driving circuit and the electrical equipment. By detecting the use state of the driving circuit, motor and the like, when the current abnormality such as short circuit occurs, the cutout is used to cut off the conductive body (such as conductive copper bar) conveying the current, so as to avoid damage to the driving circuit and the electrical equipment. This protection mechanism has a certain protection effect on the power supply circuit.

[0003] Considering that the cut-off of the conductive copper bar completely depends on the judgment of whether the driving circuit, electrical equipment and the like (hereinafter collectively referred to as external equipment) is abnormal, when the external equipment is not accurately judged, the cut-off control of the conductive copper bar is often not timely enough, and the use safety of the power supply circuit needs to be improved. CONTENT OF THE INVENTION

[0004] The embodiment of the present disclosure provides a protector, which controls the operation of the flow interruption device by directly detecting whether the use of the conductive body is abnormal, thereby improving the use safety of the protector, and at least partially solving the technical problem of insufficient use safety of the conductive body in the related art.

[0005] In order to achieve the above-mentioned purpose, according to a first aspect of the present disclosure, a protector is provided for realizing protection between a motor and a driving circuit thereof, the protector comprising:

[0006] a conductive body for transmitting current;

[0007] a first sensor for detecting an intrinsic parameter of the conductive body;

[0008] a flow interruption device configured to cut off the conductive body when the intrinsic parameter meets a preset condition.

[0009] Optionally, in some embodiments of the present disclosure, the protector further comprises:

[0010] a second sensor for detecting a circuit parameter of the driving circuit.

[0011] Optionally, in some embodiments of the present disclosure, the flow interruption device is configured to cut off the conductive body when the circuit parameter meets a preset condition.

[0012] Optionally, in some embodiments of the present disclosure, the protector further comprises:

[0013] a controller, in electrical connection with at least one of the first sensor and the second sensor, for determining whether the intrinsic parameter and / or the circuit parameter meets a preset condition.

[0014] Optionally, in some embodiments of the present disclosure, the controller is in electrical connection with the flow interrupting device, for controlling the flow interrupting device to cut off the conductor when the controller determines that the intrinsic parameter and / or the circuit parameter meets the preset condition.

[0015] Optionally, in some embodiments of the present disclosure, the protector further comprises:

[0016] a current sensor for detecting an operating current of the motor;

[0017] wherein the current sensor is in electrical connection with the controller, for causing the controller to control the flow interrupting device to cut off the conductor when the operating current of the motor meets a preset condition.

[0018] Optionally, in some embodiments of the present disclosure, the protector further comprises:

[0019] a first type of housing formed with a first accommodating chamber for accommodating the conductor and the flow interrupting device.

[0020] Optionally, in some embodiments of the present disclosure, the controller is disposed outside the first accommodating chamber.

[0021] Optionally, in some embodiments of the present disclosure, the protector further comprises:

[0022] a shielding plate disposed between the first type of housing and the controller.

[0023] Optionally, in some embodiments of the present disclosure, the protector further comprises:

[0024] a second type of housing connected with the first type of housing to form a second accommodating chamber together with the first type of housing;

[0025] wherein the controller is disposed inside the second accommodating chamber.

[0026] Optionally, in some embodiments of the present disclosure, the second sensor comprises a pyroelectric infrared sensor.

[0027] Optionally, in some embodiments of the present disclosure, the intrinsic parameter comprises a temperature of the conductor.

[0028] Optionally, in some embodiments of the present disclosure, the first sensor comprises an inductive temperature sensor.

[0029] Optionally, in some embodiments of the present disclosure, the current breaking device comprises:

[0030] a body having a blade movably arranged relative to the electrically conductive body so as to contact and cut the electrically conductive body along a moving path relative to the electrically conductive body.

[0031] Optionally, in some embodiments of the present disclosure, the electrically conductive body is provided with:

[0032] a cutting groove recessed in the electrically conductive body for the blade to be embedded in when the blade moves relative to the electrically conductive body, so as to guide the blade to cut the electrically conductive body in the cutting groove.

[0033] Optionally, in some embodiments of the present disclosure, the body is provided with a plurality of the blades arranged at intervals so as to contact a plurality of different positions on the electrically conductive body when the blades move relative to the electrically conductive body.

[0034] Optionally, in some embodiments of the present disclosure, the current breaking device further comprises:

[0035] a driving member for driving the body to move relative to the electrically conductive body to cut the electrically conductive body.

[0036] Optionally, in some embodiments of the present disclosure, the protector further comprises:

[0037] an arc extinguishing grid for providing a breakdown protection when the electrically conductive body is cut.

[0038] Optionally, in some embodiments of the present disclosure, the electrically conductive body is arranged between the blade and the arc extinguishing grid.

[0039] Optionally, in some embodiments of the present disclosure, the protector comprises a plurality of electrically conductive bodies, and a plurality of the first sensors and a plurality of the current breaking devices corresponding to the plurality of electrically conductive bodies.

[0040] According to a second aspect of the present disclosure, there is provided a vehicle comprising the protector as described above.

[0041] In the protector of the embodiments of the present disclosure, the use state of the electrically conductive body is directly detected, and the electrically conductive body is cut by the current breaking device when there is a use abnormality in the electrically conductive body, so that the cutting control of the electrically conductive body can not depend on the judgment of whether the use state of other external equipment is abnormal, thereby the electric current can be cut in time when the electrically conductive body is abnormal, and the use safety of the electrically conductive body is improved.

[0042] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0044] In order to more completely understand the present disclosure and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0045] Figure 1 is a schematic view of the overall structure of the protector provided in the exemplary embodiment of the present disclosure;

[0046] Figure 2 is an exploded view of the protector provided in the exemplary embodiment of the present disclosure;

[0047] Figure 3 is a sectional view of the protector provided in the exemplary embodiment of the present disclosure;

[0048] Figure 4 is an exploded view of part of the structure in Figure 2

[0049] Figure 5 is a schematic view of the structure of the body in Figure 2 in a first perspective view;

[0050] Figure 6 is a schematic view of the structure of the body in Figure 2 in a second perspective view;

[0051] Figure 7 is a schematic view of the structure of the conductive body in Figure 1

[0052] Figure 8 is a schematic view of the structure of the arc extinguishing grid in Figure 2

[0053] Figure 9 is a schematic view of the connection relationship between the protector and a power supply circuit in which an electric machine is located, provided in the exemplary embodiment of the present disclosure;

[0054] Figure 10 is a schematic view of the principle of triggering the breaking of the conductive body by the protector, provided in the exemplary embodiment of the present disclosure;

[0055] Figure 11 is a schematic view of the overall structure of a vehicle, provided in the exemplary embodiment of the present disclosure.

[0056] Explanation of reference numerals: ​​​

[0057] 10. Vehicle;

[0058] 100. Protector;

[0059] 110. Electric conductor; 111. Cutout; 111a. First cutout; 111b. Second cutout; 111c. Third cutout;

[0060] 120. Interrupting device; 121. Body; 122. Blade; 122a. First blade edge; 122b. Second blade edge; 122c. Third blade edge; 123. Driving member;

[0061] 130. First sensor;

[0062] 140. Second sensor;

[0063] 150. Controller; 151. First control chip; 152. Second control chip; 153. Control circuit board;

[0064] 160. First type of housing; 161. First accommodating cavity;

[0065] 170. Shielding plate;

[0066] 180. Second type of housing; 181. Second accommodating cavity;

[0067] 190. Arc extinguishing grid; 191. Metal grid sheet;

[0068] 200. Driving circuit;

[0069] 300. Motor. DETAILED DESCRIPTION

[0070] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by a person skilled in the art without creative labor are within the protection scope of the present disclosure.

[0071] According to a first aspect of the present disclosure, with reference to Figures 1 to 8 The present disclosure provides a protector 100 for achieving protection between a motor and a driving circuit thereof, which comprises an electric conductor 110, an interrupting device 120 and a first sensor 130.

[0072] The electrically conductive body 110 is configured to transmit electric current. As an example of a specific solution, the electrically conductive body 110 is, for example, a copper bar connected between a motor and a driving circuit to transmit electric current, so that the driving circuit can control the working state of the motor, such as the rotating speed and rotating direction of the motor, through various electronic components arranged thereon. The specific structure of the driving circuit for realizing the control of the working state of the motor can be adaptively set according to actual needs by those skilled in the art, and the present disclosure will not be described here.

[0073] The current breaking device 120 is configured to cut off the electrically conductive body 110, so that when the electric current between the driving circuit and the motor is abnormal, the circuit can be disconnected by cutting off the electrically conductive body 110 to protect the driving circuit and the motor.

[0074] The first sensor 130 is configured to detect the intrinsic parameter of the electrically conductive body 110. The intrinsic parameter of the electrically conductive body 110 mentioned in the present disclosure refers to the physical property of the electrically conductive body 110 itself when the electrically conductive body 110 transports electric current between external devices exemplified by the motor and the driving circuit, such as the size of the electric current passing through the electrically conductive body 110 and the temperature of the electrically conductive body 110. The present disclosure integrates the first sensor 130 on the protector 100, and configures the current breaking device 120 to cut off the electrically conductive body 110 when the intrinsic parameter meets a preset condition. For example, when the electric current passing through the electrically conductive body 110 is abnormal or the temperature of the electrically conductive body 110 is abnormal, the control of the current breaking device 120 cuts off the electrically conductive body 110.

[0075] With the above solution, in the protector 100 of the embodiment of the present disclosure, the use state of the electrically conductive body 110 is directly detected, and the electrically conductive body 110 is cut off by the current breaking device 120 when the electrically conductive body 110 has a use abnormality, so that the cut-off control of the electrically conductive body 110 can not depend on the judgment of whether the use state of other external devices is abnormal, thereby the transport of electric current can be cut off in time when the electrically conductive body 110 is abnormal, and the use safety of the electrically conductive body 110 is improved.

[0076] In some embodiments, the first sensor 130 includes an inductive temperature sensor. Specifically, the intrinsic parameter includes the temperature of the electrically conductive body 110. That is, the first sensor 130 can be used to detect the temperature of the electrically conductive body 110, so as to cut off the electrically conductive body 110 in time by the current breaking device 120 when the electrically conductive body 110 has a temperature abnormality due to a fault such as short circuit. Moreover, since the inductive temperature sensor is adopted, the first sensor 130 does not directly contact the electrically conductive body 110, the temperature rise of the first sensor 130 is relatively small when the electrically conductive body 110 works, and the first sensor 130 works more stably.

[0077] It can be understood that at this time, the first sensor 130 detects the temperature near the conductive body 110, but the temperature near the conductive body 110 changes accordingly due to the heat dissipation of the conductive body 110 when it is working, so that detecting the ambient temperature near the conductive body 110 is equivalent to detecting the intrinsic parameter of the conductive body 110 in the present disclosure.

[0078] It should be noted that although the present disclosure illustrates the function of the protector 100 by setting the protector 100 between the driving circuit and the motor, the protector 100 can also be set in other types of power transmission lines according to the actual needs to realize circuit protection by using the protector 100. That is, the setting of the protector 100 between the driving circuit and the motor should be regarded as an exemplary description of the application scenario of the protector 100, but should not be regarded as the only limitation of the use scenario of the protector 100.

[0079] In some embodiments, referring to FIGS. 1, 2 and 3, the protector 100 further comprises a first sensor 130. The first sensor 130 is configured to detect a circuit parameter of the driving circuit. The circuit parameter of the driving circuit mentioned in the present disclosure refers to, for example, the physical properties of the electronic components in the driving circuit itself when the driving circuit is working, such as the current value on the driving circuit, or the temperature of the electronic components on the driving circuit, etc. By setting the first sensor 130, the protector 100 can be used to detect the use state of the driving circuit, and then the circuit parameter of the protector 100 detected by the second sensor 140 can be used to realize more functions in the subsequent use of the circuit parameter. Figure 1 Figure 2 As shown in FIGS. 1, 2 and 3, the protector 100 further comprises a second sensor 140. The second sensor 140 is configured to detect a circuit parameter of the driving circuit. The circuit parameter of the driving circuit mentioned in the present disclosure refers to, for example, the physical properties of the electronic components in the driving circuit itself when the driving circuit is working, such as the current value on the driving circuit, or the temperature of the electronic components on the driving circuit, etc. By setting the first sensor 130, the protector 100 can be used to detect the use state of the driving circuit, and then the circuit parameter of the protector 100 detected by the second sensor 140 can be used to realize more functions in the subsequent use of the circuit parameter.

[0080] In a specific scheme, the flow breaking device 120 is configured to cut off the conductive body 110 when the circuit parameter meets the preset condition. That is, the circuit parameter can be used as a judgment condition for the flow breaking device 120 to cut off the conductive body 110. In this scheme, when one of the driving circuit or the conductive body 110 fails, the conductive body 110 can be cut off by the flow breaking device 120, so as to further improve the use safety of the circuit where the conductive body 110 is located.

[0081] ​The circuit parameter can also be the temperature of the environment in which the protector 100 is located. That is, the second sensor 140 can also be used to detect the temperature of the protector 100, so that in the case of an excessively high external environment temperature, overheating of the protector 100, and the like, the current-carrying body 110 can also be cut off by the current breaking device 120, because the current-carrying body 110 and the power transmission line connected thereto can fail in insulation when used in an environment with a high temperature, and this arrangement can further improve the safety of the protector 100. Because the driving circuit and the current-carrying body 110 are in the same power circuit, the protector 100 and the driving circuit can both be regarded as a circuit that supplies current to the motor, and therefore, the temperature of the environment outside the protector 100 can also be regarded as an environmental factor of the power circuit in which the driving circuit is located, so that the temperature of the environment in which the protector 100 is located is also regarded as a circuit parameter that can be used in actual use in the present disclosure.

[0082] In some embodiments, the second sensor 140 includes a pyroelectric infrared sensor. In specific embodiments, the protector 100 can be arranged near the driving circuit, that is, the second sensor 140 can be used to detect the temperature of the electronic components on the driving circuit, or to detect the temperature of the environment of the protector 100, and the like, so that in the case of a driving circuit failure or a high temperature of the environment in which the protector 100 is located, the current-carrying body 110 can be cut off in time by the current breaking device 120. Moreover, because the pyroelectric infrared sensor is used, the second sensor 140 does not directly contact the driving circuit, thereby reducing mutual crosstalk of electrical signals between the driving circuit and the second sensor 140, and the second sensor 140 works more stably.

[0083] In specific embodiments, the driving circuit is often arranged on one or more circuit boards, and it can be understood that, at this time, the second sensor 140 detects the temperature near the circuit board of the driving circuit, but the temperature near the circuit board of the driving circuit changes accordingly due to heat generated by the driving circuit when it is working, and therefore, detecting the temperature of the environment near the driving circuit is equivalent to detecting the circuit parameter of the protector 100 in the present disclosure.

[0084] In more specific embodiments, the driving circuit includes, for example, a power module, and the power module controls the current, voltage, and the like flowing to the motor through integrated semiconductor switches, control chips, and other electronic components, to achieve control of the output power of the motor. The specific structure of the power module for achieving power control of the motor is not the focus of improvement of the present disclosure, and can be flexibly arranged by those skilled in the art as needed, and the present disclosure will not be described in detail. In some embodiments of the present disclosure, the second sensor 140 is used to detect, for example, at least one physical property of the power module on the driving circuit when the power module is working, such as the current and temperature on the power module, so that the current-carrying body 110 can be cut off in time when the power module fails.

[0085] In some embodiments, with reference toFigure 3 The protector 100 further comprises a controller 150.

[0086] The controller 150 is electrically connected with at least one of the first sensor 130 and the second sensor 140, to determine whether the intrinsic parameter and / or the circuit parameter meets the preset condition. That is, the controller 150 is integrated on the protector 100, to timely collect and determine the intrinsic parameter and / or the circuit parameter.

[0087] In a specific scheme, the controller 150 is further electrically connected with the flow breaking device 120, to control the flow breaking device 120 to cut off the conductor 110 when the controller 150 determines that the intrinsic parameter and / or the circuit parameter meets the preset condition. Compared with the general scheme of controlling the flow breaking device 120 to work by using the control chip, the power switch and other structures on the external device such as the driving circuit and the motor, the protector 100 is provided with the controller 150, which can timely collect and determine the intrinsic parameter and / or the circuit parameter, and timely control the flow breaking device to work to cut off the conductor 110 when the conductor 110 or the driving circuit is abnormal, so that the protector 100 can relatively less rely on the external device to realize the function of cutting off the conductor 110.

[0088] In some embodiments, the protector 100 further comprises a current sensor.

[0089] The current sensor is electrically connected with the controller 150, to control the controller 150 to control the flow breaking device 120 to cut off the conductor 110 when the working current of the motor meets the preset condition. As an example, the controller 150 can be used to control the flow breaking device 120 to cut off the conductor 110 when the current sensor detects that the actual current on the motor is greater than the rated current, that is, the conductor 110 can be cut off to realize the protection of the circuit where the protector 100 is located when the motor / conductor 110 / driving circuit is abnormal.

[0090] In a specific scheme, the current sensor is a Hall sensor. It can be configured to detect the current on the wire from the conductor 110 to a three-phase motor, which is a phase line for supplying power to the three-phase motor, to detect whether the three-phase motor can work normally by detecting the current on the phase line, and to control the controller 150 to control the flow breaking device 120 to cut off the conductor 110 when the current on the phase line is too high, to realize the protection of the motor. The current sensor is not shown in the drawings.

[0091] As a specific scheme, refer to Figure 3 and Figure 4As shown, the controller 150 comprises a first control chip 151 and a second control chip 152, for example, wherein the first control chip 151 and the second control chip 152 are integrated on a control circuit board 153, the first control chip 151 is electrically connected with at least one of the first sensor 130, the second sensor 140 and the current sensor, for receiving the electrical signals sent by the first sensor 130, the second sensor 140 and the current sensor, and judging whether the conductive body 110, the driving circuit and the motor exist faults according to the corresponding electrical signals. The second control chip 152 is electrically connected with the first control chip 151 and the cut-off device 120, sends an electrical signal to the second control chip 152 when the first control chip 151 judges that the circuit where the conductive body 110 is located exists a fault, and the second control chip 152 is integrated with a corresponding power switch to control the cut-off device 120 to work, so as to realize cutting off the conductive body 110 in an electrically controlled manner.

[0092] In some embodiments, referring to Figure 1 and Figure 3 As shown, the protector 100 further comprises a first type of shell 160. The first type of shell 160 is formed with a first accommodating chamber 161 for accommodating the conductive body 110 and the cut-off device 120, so that the area of the conductive body 110 that can be broken by the cut-off device 120 is located in the first accommodating chamber 161.

[0093] In some embodiments, the controller 150 is arranged outside the first accommodating chamber 161. In this way, the conductive body 110 and the controller 150 can be separated at least, and considering that the controller 150 often works under relatively low current and voltage, while the conductive body 110 often carries high current, this configuration can reduce the interference to the controller 150 during the energization of the conductive body 110.

[0094] In specific solutions, the conductive body 110 at least partially extends out of the first accommodating chamber 161, so that the conductive body 110 is connected to the driving circuit and the motor through some wires.

[0095] In some embodiments, referring to Figure 5 As shown, the protector 100 further comprises a shielding plate 170. The shielding plate 170 is arranged between the first type of shell 160 and the controller 150. In more specific solutions, the shielding plate 170 is made of copper foil arranged to be grounded, for example, which can guide away the interference signals radiated by high voltage and high frequency, that is, further reduce the interference to the controller 150 during the current transmission of the conductive body 110, and plays a role of shielding interference signals.

[0096] In some embodiments, referring to Figure 3 and Figure 4As shown, the protector 100 further comprises a second type of shell 180. The second type of shell 180 is connected with the first type of shell 160 to form a second accommodating chamber 181 together with the first type of shell 160. The controller 150 is arranged in the second accommodating chamber 181 to be protected by the wall surface forming the second accommodating chamber 181. In specific solutions, the first type of shell 160 and the second type of shell 180 are fixedly connected through snap connection, threaded connection or the like.

[0097] It can be understood that, based on the inventive concept of the present disclosure, the specific structure of the flow interrupting device 120 can be flexibly configured as required, which can cut off the conductive body 110 in operation. Hereinafter, the specific structure of the flow interrupting device 120 for realizing the function of cutting off the conductive body 110 will be exemplarily described.

[0098] In some embodiments, referring to Figure 2 and Figure 5 As shown, the flow interrupting device 120 comprises a body 121. The body 121 has a blade 122 movably arranged relative to the conductive body 110, so that the blade 122 contacts and cuts off the conductive body 110 on the moving path relative to the conductive body 110. In specific solutions, the body 121 is slidingly arranged in the first accommodating chamber 161, and one end of the blade 122 forms a tip. During the sliding of the body 121 relative to the first shell, the tip of the blade 122 contacts and presses the conductive body 110, thereby cutting off the conductive body 110.

[0099] To cooperate with the blade 122 to quickly cut off the conductive body 110, referring to Figure 7 As shown, the conductive body 110 is provided with a cutting groove 111. The cutting groove 111 is recessed on the conductive body 110, and is used for embedding the blade 122 when the blade 122 moves relative to the conductive body 110, so as to guide the blade 122 to cut off the conductive body 110 in the cutting groove 111. By arranging the recess, the wall thickness of the position of the conductive body 110 contacting the blade 122 is relatively thin, so that the blade 122 can timely cut off the conductive body 110.

[0100] In some embodiments, the body 121 is provided with a plurality of blade portions 122 spaced apart from each other, so that the blade portions 122 can contact the conductive body 110 at different positions when the body 121 moves. By forming a plurality of blade portions 122 on the body 121, even if some of the blade portions 122 cannot normally cut the conductive body 110 due to processing defects or the like, the other blade portions 122 can normally cut the conductive body 110. This ensures that the conductive body 110 can be cut in time when the body 121 moves. Moreover, when at least two blade portions 122 can normally work, the conductive body 110 can be cut into at least three parts, ensuring that the part of the conductive body 110 connected to the driving circuit and the part connected to the motor can be disconnected electrically, and the distance between the two parts can be a certain distance, reducing the possibility of tip discharge between the two parts.

[0101] In specific solutions, with reference to Figure 5 and Figure 6 , the blade portion 122 comprises a first blade edge 122a, a second blade edge 122b, and a third blade edge 122c, wherein the second blade edge 122b is arranged between the first blade edge 122a and the third blade edge 122c. The second blade edge 122b extends in a straight line, and the extension direction of the second blade edge 122b can be perpendicular to the extension direction of the conductive body 110 (for example, when the conductive body 110 is a copper bar, the extension direction of the conductive body 110 is, for example, the straight line direction extending from the end of the conductive body 110 connected to the driving circuit to the end connected to the motor). The first blade edge 122a and the third blade edge 122c extend in a circular arc, and the first blade edge 122a and the third blade edge 122c are circumferentially arranged at the periphery of the first blade edge 122a. The first blade edge 122a, the second blade edge 122b, and the third blade edge 122c extend in their respective directions so that they can at least contact the edge of the conductive body 110 when the body 121 moves, so that the body 121 can cut the conductive body 110 when it moves.

[0102] Correspondingly, with reference to Figure 7 , the cut groove 111 comprises a first cut 111a for inserting the first blade edge 122a, a second cut 111b for inserting the second blade edge 122b, and a third cut 111c for inserting the third blade edge 122c. The extension direction of each cut groove 111 matches the extension direction of the corresponding blade portion 122, and each cut groove 111 extends through the conductive body 110 along its extension direction, so that when each blade portion 122 is matched, the conductive body 110 can be cut into a plurality of parts in time.

[0103] In some embodiments, with reference to Figure 2 and Figure 3As shown, the flow breaking device 120 further comprises a driving member 123. The driving member 123 is configured to drive the body 121 to move relative to the conductor 110 to cut off the conductor 110. In a specific embodiment, to achieve the movement of the conductor 110, the driving member 123 can be an electromagnet, for example, which is electrically connected to the controller 150. Correspondingly, a permanent magnet is arranged on the side of the body 121 close to the driving member 123, and the controller 150 controls the electromagnet to be electrified and repel the permanent magnet, thereby pushing the body 121 to move close to and cut off the conductor 110. According to actual needs, the driving member 123 can also adopt specific structures such as an electric telescopic rod, an air cylinder, a motor, and a combination of a size rack, to achieve the movement of the conductor 110, and the present disclosure does not limit this.

[0104] In some embodiments, referring to Figure 8 As shown, the protector 100 further comprises an arc extinguishing grid 190. The arc extinguishing grid 190 is configured to provide breakdown protection when the conductor 110 is cut off. In a specific embodiment, the arc extinguishing grid 190 is formed by stacking a plurality of metal grid pieces 191, for example. The metal grid pieces can divide the electric arc into multiple short arcs, extinguish the arc by using the near-cathode effect principle, reduce the possibility of generating an electric arc when the conductor 110 is cut off, and further improve the safety of the protector 100.

[0105] In some embodiments, referring to Figure 3 As shown, the conductor 110 is arranged between the blade part 122 and the arc extinguishing grid 190. Since the blade part 122 cuts off the conductor 110 by moving and pressing the conductor 110, the above arrangement can keep the arc extinguishing grid 190 relatively far away from the conductor 110 and not interfere with the normal movement of the blade part 122.

[0106] In some embodiments, referring to Figure 2 and Figure 3 As shown, the protector 100 comprises a plurality of conductors 110, and a plurality of first sensors 130 and a plurality of flow breaking devices 120 corresponding to the plurality of conductors 110. As an example, when the protector 100 acts between a driving circuit and a three-phase motor, three conductors 110 can be arranged to be connected to three phase lines that supply power to the three-phase motor. Correspondingly, three flow breaking devices 120 for cutting off the corresponding conductors 110 and three first sensors 130 for detecting the corresponding conductors 110 are arranged. The above arrangement can ensure that the other first sensors 130 and flow breaking devices 120 can work normally to cut off the conductors 110 when part of the first sensors 130 and flow breaking devices 120 fail, thereby ensuring that the current transmission can be normally cut off and improving the fault tolerance.

[0107] As an example of a specific embodiment, the cooperation relationship between the protector 100 and the motor 300 is mainly described below when the protector 100 acts on the power supply circuit in which the motor 300 is arranged.

[0108] Reference Figure 9 As shown, the motor 300 is, for example, a permanent magnet synchronous three-phase motor, integrated into a car to provide power for the rotation of the wheels. When the motor 300 drives the car wheels to rotate, the drive circuit 200110 converts the DC power supplied by the vehicle's power supply into three-phase AC power, which is connected to three conductors 110 on the protector 100 by wires. The current is then transmitted to the stator windings of the motor 300 through the conductors 110 and the wires connected to the conductors 110, driving the rotor of the motor 300 to rotate. During this process, the stator windings of the motor 300 cut the magnetic field lines of the rotor, generating a back electromotive force. The magnitude of the back electromotive force is proportional to the rotor speed.

[0109] In the event of a serious fault in the circuit supplying power to motor 300, for safety reasons, the vehicle is required to enter an emergency active short circuit (ASC) state to achieve active short circuit protection. Specifically, the ASC state is a safe operating state, which manifests in the circuit as follows: shutting down the three MOSFETs in the upper axle arm (i.e.,... Figure 9 MOSFETs S1, S2, and S3 are in the middle, and the three MOSFETs of the lower bridge arm are turned on (i.e., Figure 10 MOSFETs S4, S5, and S6 in the middle; or turn on the three MOSFETs of the upper arm (i.e., Figure 9 The motor 300 uses MOSFETs S1, S2, and S3, and shuts off the three MOSFETs in the lower axle arm, forming a closed loop between the stator windings of the motor 300 and the three-phase power supply wires connected to them. The back electromotive force energy generated by the motor 300 is released through the stator windings, and the motor 300 outputs a corresponding braking torque. ASC is a safety protection mechanism for the motor 300, which can effectively prevent damage to the drive circuit 200. However, when the drive circuit 200 fails, the aforementioned MOSFETs S1, S2, S3, S4, S5, and S6 may be damaged, preventing the vehicle from entering the active short-circuit working state, and the back electromotive force may cause thermal runaway of the drive circuit 200. The protector 100 provided in this disclosure is located between the drive circuit 200 and the motor 300. When a serious fault occurs in the drive circuit 200, it makes a judgment based on intrinsic parameters, circuit parameters, and other information, and disconnects the power circuit between the drive circuit 200 and the motor 300.

[0110] Reference Figure 10As shown, it is a schematic diagram showing the principle of the protector 100 triggering the breaking of the conductor 110. When the permanent magnet synchronous motor 300 is working to drive the wheels to rotate, the detection module integrated in the drive circuit 200 detects the state of the drive circuit 200 in real time (such as detecting whether the current, voltage is abnormal, or whether the program execution of the drive circuit 200 is normal, etc.), and the drive circuit 200 is electrically connected with the first control chip 151, so as to send an electrical signal to the first control chip 151 in the form of an electrical signal to report an error when the use state of the drive circuit 200 is abnormal. This error reporting mode is hereinafter referred to as "IPM error reporting".

[0111] Correspondingly, the first sensor 130 is electrically connected to the first control chip 151, so as to send an electrical signal to the first control chip 151 in the form of an electrical signal to report an error when the temperature of the conductor 110 is abnormal. This error reporting mode is hereinafter referred to as "conductor error reporting". The second sensor 140 is electrically connected to the first control chip 151, so as to send an electrical signal to the first control chip 151 in the form of an electrical signal to report an error when the temperature of the area where the drive circuit 200 is located is abnormal and / or the temperature of the area where the protector 100 is located is abnormal. This error reporting mode is hereinafter referred to as "thermal runaway error reporting".

[0112] When the drive circuit 200 fails, the first control chip 151 can enter the following four scenarios: IPM error reporting, IPM error reporting and conductor error reporting; IPM error reporting and thermal runaway error reporting, IPM error reporting, conductor error reporting and thermal runaway error reporting. When the first control chip 151 appears in any one of the above error reporting scenarios, the first control chip 151 sends a drive signal to the second control chip 152, so that the second control chip 152 controls the driving member 123 to drive the body 121 to move, and the blade part 122 moves to embed in the cutting groove 111 and break the conductor at the cutting groove 111. Of course, in some scenarios, when IPM error reporting does not occur, conductor error reporting and / or thermal runaway error reporting occurs, the flow breaking device 120 can also be used to cut off the conductor 110, thereby breaking the power supply circuit between the motor 300 and the drive circuit 200, and blocking the current transmission.

[0113] According to the second aspect of the present disclosure, with reference to Figure 11 As shown, a vehicle 10 is provided, which comprises the above-mentioned protector 100. The vehicle 10 has all the beneficial effects of the above-mentioned protector 100, and the present disclosure will not be repeated here.

[0114] The vehicle 10 can be a fuel automobile, a plug-in hybrid electric vehicle or a new energy vehicle, etc., and the present disclosure does not make specific limitation thereon.

[0115] In the description of the disclosure, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the disclosure, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0116] In the above embodiments, the description of each embodiment is focused on, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0117] The embodiments, implementation manners and related technical features of the disclosure can be combined or replaced with each other without conflict.

[0118] The above is only a preferred embodiment of the disclosure, and does not limit the disclosure in any form. Any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the disclosure still belongs to the scope of the technical solution of the disclosure.

Claims

1. A protector for providing protection between a motor and its drive circuit, characterized in that, The protector includes: Conductors, used to transmit electric current; A first sensor is used to detect the intrinsic parameters of the conductor; A current-cutting device is configured to cut off the conductor when the intrinsic parameters meet preset conditions.

2. The protector according to claim 1, characterized in that, Also includes: The second sensor is used to detect the circuit parameters of the drive circuit.

3. The protector according to claim 2, characterized in that, The interrupting device is configured to cut off the conductor when the circuit parameters meet preset conditions.

4. The protector according to claim 2, characterized in that, Also includes: The controller is electrically connected to at least one of the first sensor and the second sensor to determine whether the intrinsic parameters and / or the circuit parameters meet preset conditions.

5. The protector according to claim 4, characterized in that, The controller is electrically connected to the interrupting device so that when the controller determines that the intrinsic parameters and / or the circuit parameters meet preset conditions, it controls the interrupting device to cut off the conductor.

6. The protector according to claim 4, characterized in that, Also includes: A current sensor is used to detect the operating current of the motor; The current sensor is electrically connected to the controller so that when the operating current of the motor meets a preset condition, the controller controls the current-cutting device to cut off the conductor.

7. The protector according to claim 4, characterized in that, Also includes: The first type of housing has a first receiving chamber for accommodating the conductor and the interrupting device.

8. The protector according to claim 7, characterized in that, in, The controller is located outside the first accommodating cavity.

9. The protector according to claim 7, characterized in that, Also includes: A shielding plate is disposed between the first type of housing and the controller.

10. The protector according to claim 7, characterized in that, Also includes: The second type of shell is connected to the first type of shell to form a second receiving chamber together with the first type of shell; The controller is located within the second accommodating cavity.

11. The protector according to claim 2, characterized in that, The second sensor includes a pyroelectric infrared sensor.

12. The protector according to claim 1, characterized in that, The intrinsic parameters include the temperature of the conductor.

13. The protector according to claim 12, characterized in that, The first sensor includes an inductive temperature sensor.

14. The protector according to any one of claims 1 to 13, characterized in that, The flow interruption device includes: The body has a cutting edge that is movably disposed relative to the conductor, such that the cutting edge contacts and cuts the conductor on a moving path relative to the conductor.

15. The protector according to claim 14, characterized in that, The conductor is provided with: A groove is recessed into the conductor and is used to allow the cutting edge to be inserted when the cutting edge moves relative to the conductor, so as to guide the cutting edge to cut the conductor within the groove.

16. The protector according to claim 14, characterized in that, The main body is provided with a plurality of blades spaced apart from each other, so that when the blades move relative to the conductor, they come into contact with a plurality of different positions on the conductor.

17. The protector according to claim 14, characterized in that, The flow interruption device further includes: A driving element is used to drive the body to move relative to the conductor to disconnect the conductor.

18. The protector according to claim 17, characterized in that, Also includes: An arc-quenching grid is used to provide breakdown protection when the conductor is cut off.

19. The protector according to claim 18, characterized in that, The conductor is disposed between the blade and the arc-extinguishing grid.

20. The protector according to any one of claims 1 to 13, characterized in that, The protector includes a plurality of conductors, a plurality of first sensors corresponding to the plurality of conductors, and a plurality of the current-cutting devices.

21. A vehicle, characterized in that, Includes the protector as described in any one of claims 1 to 20.

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