Protection apparatus, motor controller, motor assembly, and vehicle

Abstract

A protection apparatus (10), a motor controller, a motor assembly, and a vehicle. The protection apparatus (10) comprises: a first conductive sheet (11), the first conductive sheet (11) being provided with a first through hole (111) penetrating through the first conductive sheet (11) in the thickness direction of the first conductive sheet (11), a first weak part (112) being formed at the first through hole (111) on the first conductive sheet (11), and the first weak part (112) being configured to be disconnected when impacted; a circuit board (2); and a Hall chip (3), the Hall chip (3) being disposed on the circuit board (2), part of the Hall chip (3) being disposed opposite to at least part of the first through hole (111), or part of the Hall chip (3) being at least partially inserted into the first through hole (111).

Description

Safety devices, motor controllers, motor assemblies, and vehicles

[0001] Cross-reference to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202410685064.3, filed on May 29, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of motor technology, and more particularly to a safety device, a motor controller, a motor assembly, and a vehicle. Background Technology

[0004] When the insulated-gate bipolar transistor (IGBT) is off, a large current continues to flow through the motor controller due to reverse current. To protect the motor controller from being burned out by the reverse current, multiple break holes and sampling ports need to be set on some of the three-phase copper busbars. The break holes are used to disconnect the three-phase copper busbars after an impact, and the sampling ports are used for Hall effect chip detection. However, setting too many break holes and sampling ports on the copper busbars makes the copper busbar processing complex, resulting in low processing and production efficiency and high cost. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a safety device that reduces the number of first through holes, thereby simplifying the processing of the first conductive sheet, improving the processing and production efficiency of the safety device, and reducing production costs.

[0006] This application also proposes a motor controller that includes the aforementioned safety device.

[0007] This application also proposes a motor assembly including the aforementioned motor controller.

[0008] This application also proposes a vehicle including the aforementioned motor assembly.

[0009] An insurance device according to an embodiment of this application includes: a first conductive sheet having a first through hole penetrating the first conductive sheet in the thickness direction, the first conductive sheet forming a first weak portion at the first through hole, the first weak portion being configured to break upon impact; a circuit board; a Hall effect chip disposed on the circuit board, a portion of the Hall effect chip being disposed opposite to at least a portion of the first through hole, or a portion of the Hall effect chip being at least partially inserted into the first through hole.

[0010] According to the embodiments of this application, the safety device has a first through hole extending through the thickness of the first conductive sheet. The first conductive sheet is formed as a first weak part at the first through hole. A Hall chip is disposed on the circuit board. Some Hall chips are disposed opposite to at least some of the first through holes, or some Hall chips are inserted into the first through hole. This allows the first through hole to serve as both a break hole for the first conductive sheet, facilitating the disconnection of the first conductive sheet in case of abnormal current, and a sampling hole for the Hall chip. This achieves dual use of the first through hole, thereby reducing the number of first through holes required. This simplifies the processing of the first conductive sheet, improves the processing and production efficiency of the safety device, and reduces production costs.

[0011] In some embodiments of this application, the safety device further includes: a detonation device disposed on the circuit board, the detonation device having a first striker, at least a portion of the first striker being an insulating element, the first striker being disposed corresponding to the first conductive sheet, the first striker being opposite to the first weak portion of the first conductive sheet, and the insulating portion of the first striker being used to strike the first weak portion of the first conductive sheet.

[0012] In some embodiments of this application, the first impact pin includes a first impact post, the first impact post and the first weak portion are disposed opposite each other in the width direction of the first conductive sheet; or, the first impact pin includes a first impact post and a first cutting plate, the first cutting plate is disposed on the side of the first impact post facing the first conductive sheet, the first cutting plate and the first through hole are disposed opposite each other in the width direction of the first conductive sheet, and the first cutting plate is perpendicular to the first conductive sheet.

[0013] In some embodiments of this application, the safety device further includes a current sensor disposed on and connected to the circuit board for detecting the current signal on the Hall chip. The detonation device is configured to detonate and eject the first striker to strike the weak portion corresponding to the first conductive sheet when the current sensor detects an abnormality in the current signal of the Hall chip.

[0014] In some embodiments of this application, the safety device further includes: a second conductive sheet, the first conductive sheet and the second conductive sheet being spaced apart, the second conductive sheet having a second through hole penetrating the second conductive sheet in the thickness direction of the second conductive sheet, the second conductive sheet forming a second weak portion at the second through hole, the second weak portion being configured to break upon impact, and a portion of the Hall chip being disposed opposite to at least a portion of the second through hole, or a portion of the Hall chip being at least partially inserted into the second through hole.

[0015] In some embodiments of this application, the detonation device is located between the first conductive sheet and the second conductive sheet. The detonation device also has a second striking pin, which is opposite to the second weak portion of the second conductive sheet. At least a portion of the second striking pin is an insulating member, and the insulating portion of the second striking pin is used to strike the second weak portion of the second conductive sheet. In the arrangement direction of the first conductive sheet and the second conductive sheet, the first striking pin and the second striking pin are respectively disposed on opposite sides of the detonation device.

[0016] In some embodiments of this application, the safety device further includes a third conductive sheet located between the first conductive sheet and the second conductive sheet. The third conductive sheet has a third through hole extending through the third conductive sheet in the thickness direction. A portion of the Hall chip is disposed opposite to at least a portion of the third through hole, or at least a portion of the Hall chip is inserted into the third through hole.

[0017] In some embodiments of this application, the first conductive sheet, the second conductive sheet, and the third conductive sheet are located on the same side of the thickness direction of the circuit board, at least a portion of the first conductive sheet and at least a portion of the second conductive sheet are stacked with the circuit board, the detonation device is located between the third conductive sheet and the circuit board, the first conductive sheet and the second conductive sheet are arranged parallel to each other in the thickness direction of the circuit board, and the first conductive sheet and the third conductive sheet are staggered in the thickness direction of the circuit board.

[0018] In some embodiments of this application, the outer contour of the first through hole is U-shaped or V-shaped; and / or, the outer contour of the second through hole is U-shaped or V-shaped; and / or, the outer contour of the third through hole is U-shaped or V-shaped.

[0019] In some embodiments of this application, one end of the first conductive sheet, the second conductive sheet, and the third conductive sheet is bent and extended away from the circuit board along the thickness direction of the circuit board, and the first conductive sheet and the second conductive sheet are disposed closer to the circuit board than the third conductive sheet.

[0020] In some embodiments of this application, at least one of the first conductive sheet and the second conductive sheet includes a first sub-conductive sheet, a second sub-conductive sheet and a third sub-conductive sheet connected in sequence. The first sub-conductive sheet, the second sub-conductive sheet and the third sub-conductive sheet are separate processed parts. The first through hole is provided on the second sub-conductive sheet of the first conductive sheet, and / or the second through hole is provided on the second sub-conductive sheet of the second conductive sheet.

[0021] In some embodiments of this application, the thickness of the first sub-conductive sheet and the third sub-conductive sheet is greater than the thickness of the second sub-conductive sheet.

[0022] In some embodiments of this application, there is one first through hole, which is open on one side facing the width direction of the first conductive sheet; or, there are two first through holes, which are respectively located at both ends of the width direction of the first conductive sheet and are arranged opposite to each other in the width direction of the first conductive sheet, with the sides of the two first through holes facing away from each other open; or, there are four first through holes, which are divided into two groups, each group including two first through holes arranged opposite to each other in the width direction of the first conductive sheet, with the two first through holes in each group located at both ends of the width direction of the first conductive sheet and the sides of the two first through holes facing away from each other open, the two groups of first through holes being spaced apart in the length direction of the first conductive sheet, and the first conductive sheet between the two groups of first through holes being constructed as the first weak part.

[0023] In some embodiments of this application, the Hall chip is a Hall chip without a magnetic core, or the Hall chip is a Hall chip with a magnetic core.

[0024] The motor controller according to an embodiment of this application includes the aforementioned safety device.

[0025] According to the motor controller of the present application embodiment, by setting the above-mentioned safety device, a first through hole is provided on the first conductive sheet in the thickness direction of the first conductive sheet, and the first conductive sheet is formed as a first weak part at the first through hole. Hall chips are set on the circuit board, and some Hall chips are arranged opposite to at least some of the first through holes, or some Hall chips are inserted into the first through hole. Thus, the first through hole can be used as a break hole for the first conductive sheet, which facilitates the disconnection of the first conductive sheet when the current is abnormal. At the same time, the first through hole can also be used as a sampling hole for the Hall chip, realizing the dual use of the first through hole. This reduces the number of first through holes, simplifies the processing of the first conductive sheet, improves the processing and production efficiency of the safety device, and reduces production costs.

[0026] In some embodiments of this application, the safety device further includes a second conductive sheet, a third conductive sheet, and a power component. The first conductive sheet, the second conductive sheet, and the third conductive sheet are configured as three-phase conductive components. One end of the first conductive sheet, the second conductive sheet, and the third conductive sheet is connected to the power component, and the other end is used to connect to a motor.

[0027] In some embodiments of this application, the circuit board is configured as the control board of the motor controller.

[0028] The motor assembly according to an embodiment of this application includes the motor controller described above.

[0029] According to the motor assembly of the present application embodiment, by setting the above-mentioned motor controller, a first through hole is provided on the first conductive sheet in the thickness direction of the first conductive sheet, and the first conductive sheet is formed as a first weak part at the first through hole. Hall chips are set on the circuit board, and some Hall chips are arranged opposite to at least some of the first through holes, or some Hall chips are inserted into the first through hole. Thus, the first through hole can be used as a break hole for the first conductive sheet, which facilitates the disconnection of the first conductive sheet when the current is abnormal. At the same time, the first through hole can also be used as a sampling hole for the Hall chip, realizing the dual use of the first through hole. This reduces the number of first through holes, simplifies the processing of the first conductive sheet, improves the processing and production efficiency of the safety device, and reduces the production cost.

[0030] The vehicle according to an embodiment of this application includes the motor assembly described above.

[0031] According to the vehicle embodiment of this application, by setting the above-mentioned motor assembly, a first through hole is provided on the first conductive sheet in the thickness direction of the first conductive sheet, and the first conductive sheet forms a first weak part at the first through hole. Hall chips are set on the circuit board, and some Hall chips are arranged opposite to at least some of the first through holes, or some Hall chips are inserted into the first through hole. Thus, the first through hole can be used as a break hole for the first conductive sheet, which facilitates the disconnection of the first conductive sheet when the current is abnormal. At the same time, the first through hole can also be used as a sampling hole for the Hall chip, realizing the dual use of the first through hole. This reduces the number of first through holes, simplifies the processing of the first conductive sheet, improves the processing and production efficiency of the safety device, and reduces production costs.

[0032] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0033] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0034] Figure 1 is a perspective view of a safety device according to an embodiment of this application;

[0035] Figure 2 is a top view of the safety device according to Embodiment 1 of this application, wherein the first striking pin includes a first striking post and two first through holes;

[0036] Figure 3 is a top view of the safety device according to Embodiment 2 of this application, wherein the first striking pin includes a first striking post, and there are four first through holes, the outer contour of which is U-shaped;

[0037] Figure 4 is a top view of the safety device according to Embodiment 3 of this application, wherein the first striking pin includes a first striking post, and there are four first through holes, some of which have a U-shaped outer contour and some have a V-shaped outer contour.

[0038] Figure 5 is a top view of the safety device after activation according to Embodiment 2 or 3 of this application;

[0039] Figure 6 is a top view of the safety device according to Embodiment 4 of this application, wherein the first striking pin includes a first impact post and a first cutting plate;

[0040] Figure 7 is a top view of a safety device according to Embodiment 5 of this application, wherein the first conductive sheet and the second conductive sheet each include a first sub-conductive sheet, a second sub-conductive sheet and a third conductive sheet connected in sequence;

[0041] Figure 8 is a perspective view of the safety device according to Embodiment 5 of this application;

[0042] Figure 9 is an enlarged view of point A in Figure 7;

[0043] Figure 10 is a schematic diagram of a vehicle according to an embodiment of this application.

[0044] Reference numerals: 10000, Vehicle; 1000, Motor assembly; 100, Motor controller; 10, Safety device; 11, First conductive sheet; 111, First through hole; 112, First weak point; 12, Second conductive sheet; 121, Second through hole; 122, Second weak point; 13, First sub-conductive sheet; 14, Second sub-conductive sheet; 15, Third sub-conductive sheet; 16, Third conductive sheet; 161, Third through hole; 2, Circuit board; 3, Hall effect chip; 4, Detonation device; 41, First firing pin; 411, First impact post; 412, First cutting plate; 42, Second firing pin; 421, Second impact post; 422, Second cutting plate; 5, Current sensor. Detailed Implementation

[0045] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0046] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0047] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] The insurance device 10 according to an embodiment of this application is described below with reference to Figures 1-9.

[0049] As shown in Figures 1-9, the insurance device 10 according to an embodiment of this application includes: a first conductive sheet 11, a circuit board 2, and a Hall chip 3.

[0050] Specifically, referring to Figures 2-7, the first conductive sheet 11 has a first through hole 111 penetrating through the thickness of the first conductive sheet 11. A first weak portion 112 is formed at the first through hole 111, and the first weak portion 112 is configured to break upon impact. It should be noted that the first conductive sheet 11 connects the motor and the motor controller 100. When the first weak portion 112 is not broken, it can carry current, allowing the first conductive sheet 11 to be normally energized, ensuring the circuit connection between the motor controller 100 and the motor, thus enabling the motor to operate normally. When the current is abnormal, the first weak portion 112 will be impacted and break, causing the first conductive sheet 11 to open the circuit, thereby cutting off the loop between the motor and the motor controller 100, thus preventing damage to the motor and motor controller 100 from abnormal current and improving safety.

[0051] In some embodiments of this application, as shown in Figures 8 and 9, the Hall chip 3 is disposed on the circuit board 2, with a portion of the Hall chip 3 opposite to at least a portion of the first through hole 111, or a portion of the Hall chip 3 inserted into the first through hole 111. For example, in the examples shown in Figures 1-9, a portion of the Hall chip 3 and at least a portion of the first through hole 111 are opposite to each other in the thickness direction of the circuit board 2. However, this application is not limited to this; a portion of the Hall chip 3 may also be inserted into the first through hole 111.

[0052] Understandably, the Hall chip 3 can determine the magnitude of the current passing through the first conductive sheet 11 by the strength of the magnetic field, thereby determining whether the current on the first conductive sheet 11 is abnormal. The first through hole 111 allows the magnetic field lines generated on the first conductive sheet 11 to pass through, thus making the first through hole 111 a sampling hole of the Hall chip 3, which facilitates the Hall chip 3 to detect the current on the first conductive sheet 11.

[0053] The first conductive sheet 11 is formed as a first weak point 112 at the first through hole 111, meaning the first through hole 111 can serve as a break hole for the first conductive sheet 11, facilitating the disconnection of the first conductive sheet 11 in case of abnormal current. Simultaneously, the first through hole 111 can also serve as a sampling hole for the Hall chip 3, achieving a dual function for the first through hole 111. Compared to separately setting break holes and sampling holes on the conductive sheet, this reduces the number of first through holes 111, simplifying the processing of the first conductive sheet 11, improving the processing and production efficiency of the safety device 10, and reducing production costs.

[0054] According to the embodiments of this application, the safety device 10 has a first through hole 111 extending through the thickness of the first conductive sheet 11. The first conductive sheet 11 forms a first weak part 112 at the first through hole 111. A Hall chip 3 is disposed on the circuit board 2. Some Hall chips 3 are disposed opposite to at least some of the first through hole 111, or some Hall chips 3 are inserted into the first through hole 111. Thus, the first through hole 111 can serve as a break hole for the first conductive sheet 11, facilitating the disconnection of the first conductive sheet 11 when the current is abnormal. At the same time, the first through hole 111 can also serve as a sampling hole for the Hall chip 3, realizing the dual purpose of the first through hole 111. This reduces the number of first through holes 111, simplifies the processing of the first conductive sheet 11, improves the processing and production efficiency of the safety device 10, and reduces production costs.

[0055] In some embodiments of this application, as shown in Figures 1-8, the safety device 10 further includes: a detonation device 4, which is disposed on the circuit board 2. The detonation device 4 has a first striking pin 41, at least a portion of which is an insulating element. The first striking pin 41 is correspondingly disposed with the first conductive sheet 11 and is opposite to the first weak portion 112 of the first conductive sheet 11. The insulating portion of the first striking pin 41 is used to strike the first weak portion 112 of the first conductive sheet 11.

[0056] It should be noted that the first striking pin 41 can be entirely made of insulating material such as plastic, or the first striking pin 41 can be partially made of insulating material, such as the outer peripheral wall of the first striking pin 41 can be made of insulating material. This can prevent the formation of a circuit connection between the first striking pin 41 and the first conductive piece 11. This ensures that when the first striking pin 41 is inserted into the broken part of the first conductive piece 11, the circuit is broken after the first conductive piece 11 breaks. This further ensures that the motor and the motor controller 100 cannot form a circuit when the current is abnormal, thereby improving safety.

[0057] It is understandable that by having the first striker 41 face the first weak part 112 of the first conductive sheet 11, the first striker 41 is more likely to break the first weak part 112 of the first conductive sheet 11 when the current is abnormal, thereby further ensuring that the motor and the motor controller 100 cannot form a circuit when the current is abnormal, thus improving safety.

[0058] Furthermore, when the detonating device 4 is detonated, inert gas is injected into the first weak point 112 of the first conductive sheet 11, thereby eliminating the electric arc generated after the first weak point 112 of the first conductive sheet 11 breaks, thus improving safety. Simultaneously, the first firing pin 41 can extend into the fracture point of the first weak point 112 of the first conductive sheet 11. Since at least a portion of the first firing pin 41 is an insulating component, it can further eliminate the electric arc generated after the first weak point 112 of the first conductive sheet 11 breaks, further improving safety.

[0059] When the current is normal, the first striking pin 41 is tightly retracted in the detonation device 4. When the Hall element detects an abnormal current, the detonation device 4 is detonated, causing the first striking pin 41 to pop out. The first striking pin 41 impacts the first weak part 112 of the first conductive sheet 11, causing the first weak part 112 of the first conductive sheet 11 to break. At the same time, inert gas is sprayed into the first weak part 112 of the first conductive sheet 11, thereby eliminating the electric arc generated after the first weak part 112 of the first conductive sheet 11 breaks, thus cutting off the circuit between the motor and the motor controller 100, thereby improving safety.

[0060] In some embodiments of this application, as shown in Figures 2-5 and 7, the first striking pin 41 includes a first impact post 411. The first impact post 411 and the corresponding first weak portion 112 of the first conductive sheet 11 are disposed opposite each other in the width-upward direction of the first conductive sheet 11. It should be noted that at least a portion of the first impact post 411 is an insulating component, and the insulating portion of the first impact post 411 is used to impact the first weak portion 112 of the first conductive sheet 11. It is understood that the impact post has a robust and reliable structure, thereby ensuring that the first impact post 411 is not easily broken when impacting the first weak portion 112 of the first conductive sheet 11, thus improving the reliability of the first striking pin 41 colliding with the first weak portion 112 of the first conductive sheet 11.

[0061] In some embodiments of this application, as shown in FIG6, the first impact pin 41 includes a first impact post 411 and a first cutting plate 412. The first cutting plate 412 is disposed on the side of the first impact post 411 facing the first conductive sheet 11. The first cutting plate 412 and the first through hole 111 are disposed opposite to each other in the width direction of the first conductive sheet 11, and the first cutting plate 412 is perpendicular to the first conductive sheet 11. It should be noted that at least a portion of the first cutting plate 412 is an insulating member, and the insulating portion of the first cutting plate 412 is used to impact the first weak part 112 of the first conductive sheet 11. The first cutting plate 412 being perpendicular to the first conductive sheet 11 means that the plane containing the end face of the first conductive sheet 11 in the thickness direction is perpendicular to the plane containing the end face of the first cutting plate 412 in the thickness direction.

[0062] Understandably, the arrangement of the first impact post 411 ensures that the first impact pin 41 has sufficient structural strength when it impacts the first weak part 112 of the first conductive sheet 11, thus preventing the first impact pin 41 from breaking. The first cutting plate 412 is sharper than the first impact post 411, and its arrangement makes it easier for the first impact pin 41 to break the first weak part 112 of the first conductive sheet 11. This further ensures that the motor and the motor controller 100 cannot form a circuit when the current is abnormal, thereby improving safety.

[0063] In addition, when the first weak part 112 of the first conductive sheet 11 is cut off, the first cutting plate 412 is thin, which makes it easier for the first cutting plate 412 to extend into the break of the first weak part 112 of the first conductive sheet 11, thereby further eliminating the electric arc generated after the first weak part 112 of the first conductive sheet 11 breaks, and improving safety.

[0064] In some embodiments of this application, as shown in Figures 2-7, the safety device 10 further includes a current sensor 5, which is disposed on and connected to the circuit board 2 and is used to detect the current signal on the Hall chip 3. The detonation device 4 is configured to detonate and eject the first firing pin 41 to strike the weak part of the corresponding first conductive sheet 11 when the current sensor 5 detects an abnormal current signal on the Hall chip 3.

[0065] Understandably, the current sensor 5 is connected to the circuit board 2, and the Hall chip 3 is also connected to the circuit board 2. This allows the current signal on the Hall chip 3 to be transmitted to the current sensor 5. The current sensor 5 processes the current signal on the Hall chip 3 to determine whether the current is abnormal. Simultaneously, the detonation device 4 is connected to the circuit board 2. When the current sensor 5 determines that the current is abnormal, it can control the detonation device 4 to detonate, causing the first firing pin 41 to eject and strike the first weak point 112 of the corresponding first conductive sheet 11, thereby breaking the first weak point 112 of the first conductive sheet 11. This further ensures that the motor and the motor controller 100 cannot form a circuit when the current is abnormal, thus improving safety.

[0066] In some embodiments of this application, as shown in Figures 2-7, the safety device 10 further includes: a second conductive sheet 12, the first conductive sheet 11 and the second conductive sheet 12 being spaced apart, the second conductive sheet 12 having a second through hole 121 penetrating the second conductive sheet 12 in the thickness direction of the second conductive sheet 12, the second conductive sheet 12 forming a second weak portion 122 at the second through hole 121, the second weak portion 122 being configured to break when impacted, a portion of the Hall chip 3 being disposed opposite to at least a portion of the second through hole 121, or a portion of the Hall chip 3 being at least partially inserted into the second through hole 121.

[0067] It should be noted that the first conductive piece 11 and the second conductive piece 12 are spaced apart in the width direction of the first conductive piece 11. The second conductive piece 12 is also used to connect the motor and the motor controller 100. When the second weak part 122 is not disconnected, the second weak part 122 can carry current, thereby ensuring that the second conductive piece 12 is normally energized and that the circuit between the motor controller 100 and the motor is connected, allowing the motor to work normally. When the current is abnormal, the second weak part 122 will be impacted and disconnected, causing the second conductive piece 12 to be open-circuited, thus cutting off the circuit between the motor and the motor controller 100, thereby preventing the motor and the motor controller 100 from being damaged by abnormal current and improving safety. Therefore, when either the first conductive piece 11 or the second conductive piece 12 is disconnected, the circuit between the motor and the motor controller 100 can be cut off, thereby preventing the motor and the motor controller 100 from being damaged by abnormal current and further improving safety.

[0068] In some embodiments of this application, as shown in Figures 8 and 9, a portion of the Hall chip 3 is disposed opposite to at least a portion of the second through-hole 121, or a portion of the Hall chip 3 is inserted into the second through-hole 121. For example, in the examples shown in Figures 1-9, a portion of the Hall chip 3 and at least a portion of the second through-hole 121 are disposed opposite to each other in the thickness direction of the circuit board 2. However, this application is not limited to this; a portion of the Hall chip 3 may also be inserted into the second through-hole 121.

[0069] Understandably, the Hall chip 3 can determine the magnitude of the current passing through the second conductive sheet 12 by measuring the strength of the magnetic field, thereby determining whether the current on the second conductive sheet 12 is abnormal. The second through-hole 121 allows the magnetic field lines generated on the second conductive sheet 12 to pass through, thus making the second through-hole 121 a sampling hole for the Hall chip 3, facilitating the detection of the current on the second conductive sheet 12 by the Hall chip 3.

[0070] The second conductive sheet 12 is formed as a second weak point 122 at the second through hole 121. That is, the second through hole 121 can serve as a break hole for the second conductive sheet 12, thereby facilitating the disconnection of the second conductive sheet 12 in case of abnormal current. At the same time, the second through hole 121 can also serve as a sampling hole for the Hall chip 3, realizing the dual function of the second through hole 121. Compared with setting the break hole and sampling hole separately on the conductive sheet, the number of second through holes 121 can be reduced, thereby simplifying the processing of the second conductive sheet 12, improving the processing and production efficiency of the safety device 10, and reducing production costs.

[0071] In some embodiments of this application, as shown in Figures 1-8, the detonation device 4 is located between the first conductive sheet 11 and the second conductive sheet 12. The detonation device 4 also has a second striking pin 42, which is opposite to the second weak portion 122 of the second conductive sheet 12. At least a portion of the second striking pin 42 is an insulating member, and the insulating portion of the second striking pin 42 is used to strike the second weak portion 122 of the second conductive sheet 12.

[0072] It should be noted that the second striker 42 can be entirely made of insulating material such as plastic, or it can be partially made of insulating material, such as the outer peripheral wall of the second striker 42. This can prevent the formation of a circuit connection between the second conductive piece 12 and the second conductive piece 12. When the second striker 42 extends into the broken part of the second conductive piece 12, it can ensure that the circuit is broken after the second conductive piece 12 breaks. This further ensures that the motor and the motor controller 100 cannot form a circuit when the current is abnormal, thereby improving safety.

[0073] It is understandable that by having the second striker 42 face the second weak part 122 of the second conductive sheet 12, the second striker 42 is more likely to break the second weak part 122 of the second conductive sheet 12 when the current is abnormal, thereby further ensuring that the motor and the motor controller 100 cannot form a circuit when the current is abnormal, thus improving safety.

[0074] Furthermore, when the detonating device 4 is detonated, inert gas is injected into the second weak point 122 of the second conductive sheet 12, thereby eliminating the electric arc generated after the second weak point 122 of the second conductive sheet 12 breaks, improving safety. Simultaneously, the second firing pin 42 can extend into the broken point of the second weak point 122 of the second conductive sheet 12. Since at least a portion of the second firing pin 42 is an insulating component, it can further eliminate the electric arc generated after the second weak point 122 of the second conductive sheet 12 breaks, improving safety.

[0075] When the current is normal, the second striker 42 is tightly retracted in the detonation device 4. When the Hall element detects an abnormal current, the detonation device 4 is detonated, causing the second striker 42 to pop out. The impact of the second striker 42 on the second weak part 122 of the second conductive sheet 12 causes the second weak part 122 of the second conductive sheet 12 to break. At the same time, inert gas is sprayed into the second weak part 122 of the second conductive sheet 12 to eliminate the electric arc generated after the second weak part 122 of the second conductive sheet 12 breaks, thereby cutting off the circuit between the motor and the motor controller 100, thus improving safety.

[0076] In some embodiments of this application, as shown in Figures 2-7, the first firing pin 41 and the second firing pin 42 are respectively disposed on opposite sides of the detonating device 4 in the arrangement direction of the first conductive sheet 11 and the second conductive sheet 12. This allows one detonating device 4 to simultaneously cut off the first conductive sheet 11 and the second conductive sheet 12, thereby reducing the number of detonating devices 4 required, simplifying the structure, and reducing costs.

[0077] In some embodiments of this application, as shown in Figures 2-5 and 7, the second striking pin 42 includes a second impact post 421. The second impact post 421 and the corresponding second weak portion 122 of the second conductive sheet 12 are disposed opposite each other in the width-upward direction of the second conductive sheet 12. It should be noted that at least a portion of the second impact post 421 is an insulating component, and the insulating portion of the second impact post 421 is used to impact the second weak portion 122 of the second conductive sheet 12. It is understood that the impact post has a robust and reliable structure, thereby ensuring that the second impact post 421 is not easily broken when impacting the second weak portion 122 of the second conductive sheet 12, thus improving the reliability of the second striking pin 42 colliding with the second weak portion 122 of the second conductive sheet 12.

[0078] In some embodiments of this application, as shown in FIG6, the second impact pin 42 includes a second impact post 421 and a second cutting plate 422. The second cutting plate 422 is disposed on the side of the second impact post 421 facing the second conductive sheet 12. The second cutting plate 422 and the second through hole 121 are disposed opposite to each other in the width direction of the second conductive sheet 12, and the second cutting plate 422 is perpendicular to the second conductive sheet 12. It should be noted that at least a portion of the second cutting plate 422 is an insulating member, and the insulating portion of the second cutting plate 422 is used to impact the second weak portion 122 of the second conductive sheet 12. The second cutting plate 422 being perpendicular to the second conductive sheet 12 means that the plane containing the end face of the second conductive sheet 12 in the thickness direction is perpendicular to the plane containing the end face of the second cutting plate 422 in the thickness direction.

[0079] Understandably, the arrangement of the second impact post 421 ensures that the second impact pin 42 has sufficient structural strength when it impacts the second weak part 122 of the second conductive sheet 12, thus preventing the second impact pin 42 from breaking. The second cutting plate 422 is sharper than the second impact post 421, and its arrangement makes it easier for the second impact pin 42 to break the second weak part 122 of the second conductive sheet 12. This further ensures that the motor and the motor controller 100 cannot form a circuit when the current is abnormal, thereby improving safety.

[0080] In addition, when the second weak part 122 of the second conductive sheet 12 is cut off, the second cutting plate 422 is thinner, which makes it easier for the second cutting plate 422 to extend into the break of the second weak part 122 of the second conductive sheet 12, thereby further eliminating the electric arc generated after the second weak part 122 of the second conductive sheet 12 breaks, and improving safety.

[0081] In some embodiments of this application, as shown in Figures 2-7, the safety device 10 further includes a third conductive sheet 16, which is located between the first conductive sheet 11 and the second conductive sheet 12. The third conductive sheet 16 has a third through hole 161 extending through the third conductive sheet 16 in the thickness direction. A portion of the Hall effect chip 3 is disposed opposite to at least a portion of the third through hole 161, or at least a portion of the Hall effect chip 3 is inserted into the third through hole 161. It should be noted that by configuring the first conductive sheet 11, the second conductive sheet 12, and the third conductive sheet 16, a three-phase current output can be achieved, thereby enabling the operation of a three-phase motor.

[0082] Understandably, the third through-hole 161 allows magnetic field lines generated on the third conductive sheet 16 to pass through, thus making the third through-hole 161 a sampling hole for the Hall chip 3, facilitating the Hall chip 3 to detect the current on the third conductive sheet 16. When the current on the third conductive sheet 16 is abnormal, the detonation device 4 is detonated, with the first striking pin 41 striking the first weak part 112 and the second striking pin 42 striking the second weak part 122, thereby severing the first weak part 112 and the second weak part 122. This prevents the motor and the motor controller 100 from forming a circuit, thus improving safety.

[0083] In some embodiments of this application, as shown in Figures 1-8, the first conductive sheet 11, the second conductive sheet 12, and the third conductive sheet 16 are located on the same side of the circuit board 2 in the thickness direction. At least a portion of the first conductive sheet 11 and at least a portion of the second conductive sheet 12 are stacked with the circuit board 2. The detonating device 4 is located between the third conductive sheet 16 and the circuit board 2. The first conductive sheet 11 and the second conductive sheet 12 are arranged parallel to each other in the thickness direction of the circuit board 2, while the first conductive sheet 11 and the third conductive sheet 16 are staggered in the thickness direction of the circuit board 2. It can be understood that by staggering the first conductive sheet 11 and the third conductive sheet 16 in the thickness direction of the circuit board 2, it is easier to install the detonating device 4, thereby improving installation and production efficiency.

[0084] In some embodiments of this application, as shown in Figures 2-7, the outer contour of the first through hole 111 is U-shaped or V-shaped; thus, the outer contour of the first through hole 111 has more options, thereby making the safety device 10 applicable to different scenarios and improving its applicability.

[0085] When there are multiple first through holes 111, the outer contours of all the first through holes 111 can be U-shaped, or part of the outer contours of the multiple first through holes 111 can be U-shaped and the other part can be V-shaped, or the outer contours of the multiple first through holes 111 can all be V-shaped. As shown in Figures 2, 3 and 6, the outer contours of the first through holes 111 can all be U-shaped; as shown in Figures 4 and 5, part of the outer contours of the multiple first through holes 111 can be U-shaped and the other part can be V-shaped; as shown in Figure 7, the outer contours of the multiple first through holes 111 can all be V-shaped.

[0086] In some embodiments of this application, as shown in Figures 2-7, the outer contour of the second through hole 121 is U-shaped or V-shaped; thus, the outer contour of the second through hole 121 has more options, thereby making the safety device 10 applicable to different scenarios and improving its applicability.

[0087] When there are multiple second through holes 121, the outer contours of all the second through holes 121 can be U-shaped, or part of the outer contours of the multiple second through holes 121 can be U-shaped and the other part can be V-shaped, or the outer contours of the multiple second through holes 121 can all be V-shaped. As shown in Figures 2, 3 and 6, the outer contours of the second through holes 121 can all be U-shaped; as shown in Figures 4 and 5, part of the outer contours of the multiple second through holes 121 can be U-shaped and the other part can be V-shaped; as shown in Figure 7, the outer contours of the multiple second through holes 121 can all be V-shaped.

[0088] In some embodiments of this application, as shown in Figures 2-7, the outer contour of the third through hole 161 is U-shaped or V-shaped. This allows for more choices in the outer contour of the third through hole 161, enabling the safety device 10 to be applicable to different scenarios and thus improving its applicability.

[0089] In some embodiments of this application, as shown in Figures 1-8, one end of the first conductive sheet 11, the second conductive sheet 12, and the third conductive sheet 16 is bent and extends away from the circuit board 2 along the thickness direction of the circuit board 2. The first conductive sheet 11 and the second conductive sheet 12 are positioned closer to the circuit board 2 than the third conductive sheet 16. Therefore, by bending and extending one end of the first conductive sheet 11, the second conductive sheet 12, and the third conductive sheet 16 away from the circuit board 2 along the thickness direction of the circuit board 2, the first conductive sheet 11, the second conductive sheet 12, and the third conductive sheet 16 can utilize part of the space in the thickness direction of the circuit board 2, thereby optimizing the spatial arrangement and making the structure more compact.

[0090] In some embodiments of this application, as shown in Figures 7-9, at least one of the first conductive sheet 11 and the second conductive sheet 12 includes a first sub-conductive sheet 13, a second sub-conductive sheet 14, and a third sub-conductive sheet 15 connected in sequence. The first sub-conductive sheet 13, the second sub-conductive sheet 14, and the third sub-conductive sheet 15 are separate processed parts. A first through hole 111 is provided on the second sub-conductive sheet 14 of the first conductive sheet 11, and / or, a second through hole 121 is provided on the second sub-conductive sheet 14 of the second conductive sheet 12.

[0091] Understandably, one of the first sub-conductive piece 13 and the third sub-conductive piece 15 is connected to the motor, and the other is connected to the motor controller 100. Taking the first conductive piece 11, which includes the first sub-conductive piece 13, the second sub-conductive piece 14, and the third sub-conductive piece 15, as an example, when the current is normal, the two ends of the second sub-conductive piece 14 are connected to the first sub-conductive piece 13 and the third sub-conductive piece 15 respectively, thereby realizing the circuit connection between the motor and the motor controller 100, and realizing the normal operation of the motor.

[0092] Taking the first conductive sheet 11, which includes a first sub-conductive sheet 13, a second sub-conductive sheet 14, and a third sub-conductive sheet 15, as an example, the second sub-conductive sheet 14 forms a first weak point 112 at the first through hole 111. When the current is abnormal, the first weak point 112 of the second sub-conductive sheet 14 is impacted and breaks, thereby disconnecting the first sub-conductive sheet 13 and the third sub-conductive sheet 15, thus disconnecting the circuit between the motor and the motor controller 100, thereby improving safety. At the same time, if the second sub-conductive sheet 14 is subjected to an excessively heavy impact, the second sub-conductive sheet 14 may fly out, but the first sub-conductive sheet 13 and the third sub-conductive sheet 15 will not be affected by the impact, thus protecting the integrity of the first sub-conductive sheet 13 and the third sub-conductive sheet 15, thereby ensuring the integrity of the motor and the motor controller 100.

[0093] In addition, if the second sub-conductive piece 14 is broken, the safety device 10 can still be used normally after the second sub-conductive piece 14 is replaced, thereby avoiding the need to replace the entire first conductive piece 11 and reducing costs.

[0094] In some embodiments of this application, the thickness of the first sub-conductive sheet 13 and the third sub-conductive sheet 15 is greater than the thickness of the second sub-conductive sheet 14. This makes the second sub-conductive sheet 14 thinner, thus making its first weak point 112 more easily broken, thereby improving safety. Simultaneously, it reduces the manufacturing cost of the second sub-conductive sheet 14, thereby improving economic efficiency.

[0095] In some embodiments of this application, there is only one first through hole 111, which is open to one side of the first conductive sheet 11 in the width direction. It is understood that in this case, the first through hole 111 and the first striking pin 41 are arranged opposite each other in the width direction of the first conductive sheet 11, with the first through hole 111 open to one side of the width direction of the first conductive sheet 11. This makes the first weak point 112 of the first conductive sheet 11 easier to break, thereby improving safety. At the same time, providing only one first through hole 111 reduces the number of first through holes 111, thus simplifying the processing of the first conductive sheet 11, improving the processing and production efficiency of the safety device 10, and reducing production costs.

[0096] Alternatively, as shown in Figures 2, 6, and 7, there are two first through holes 111. These two first through holes 111 are located at opposite ends of the width direction of the first conductive sheet 11 and are positioned opposite each other in that direction. The sides of the two first through holes 111 facing away from each other are open. In this case, the first through holes 111 and the first striking pin 41 are positioned opposite each other in the width direction of the first conductive sheet 11. Therefore, by providing two first through holes 111, the area of ​​the first weak part 112 of the first conductive sheet 11 is reduced, thereby further reducing the structural strength of the first weak part 112 of the first conductive sheet 11. This makes the first weak part 112 of the first conductive sheet 11 easier to break, thus improving safety.

[0097] Alternatively, as shown in Figures 3-5, there are four first through holes 111, which are divided into two groups. Each group includes two first through holes 111 arranged opposite each other in the width direction of the first conductive sheet 11. The two first through holes 111 in each group are located at both ends of the width direction of the first conductive sheet 11, and the side of the two first through holes 111 facing away from each other is open. The two groups of first through holes 111 are spaced apart in the length direction of the first conductive sheet 11, and the first conductive sheet 11 between the two groups of first through holes 111 is constructed as a first weak part 112.

[0098] It should be noted that there are four first through holes 111 on the first conductive sheet 11, while there are still two first through holes 161 on the third conductive sheet 16. Since the first through holes 161 on the third conductive sheet 16 are only used to cooperate with the Hall chip 3, it is sufficient to set the first through holes 161 on the third conductive sheet 16 to be two. This simplifies the processing of the third conductive sheet 16, improves the processing and production efficiency of the safety device 10, and reduces the production cost.

[0099] In some embodiments of this application, as shown in Figures 3-5, there are four first through holes 111 on the first conductive sheet 11. The four first through holes 111 are divided into two groups. Each group includes two first through holes 111 disposed opposite to each other in the width direction of the first conductive sheet 11. The two first through holes 111 in each group are located at both ends in the width direction of the first conductive sheet 11, and the sides of the two first through holes 111 that are away from each other are open. The two groups of first through holes 111 are spaced apart in the length direction of the first conductive sheet 11. The first conductive sheet 11 between the two groups of first through holes 111 is constructed as a first weak part 112.

[0100] Understandably, at this time, the first weak part 112 of the first conductive sheet 11 and the first striker 41 are arranged opposite each other in the width direction of the first conductive sheet 11, and the Hall chip 3 cooperates with two of the first through holes 111. By setting four first through holes 111, the structural strength of the first weak part 112 of the first conductive sheet 11 is further reduced, making the first weak part 112 of the first conductive sheet 11 easier to break, thereby improving safety.

[0101] In addition, the first conductive sheet 11 between the two sets of first through holes 111 is constructed as a first weak part 112. When the first weak part 112 is broken, it is easier to form a gap between the two sets of first through holes 111, which makes it easier for the first firing pin 41 to extend into the broken part of the first weak part 112 of the first conductive sheet 11. This can further eliminate the electric arc generated after the first weak part 112 of the first conductive sheet 11 breaks, thus improving safety.

[0102] In some embodiments of this application, there is only one second through hole 121, which is open to one side facing the width direction of the second conductive sheet 12. It is understood that in this case, the second through hole 121 and the second striking pin 42 are arranged opposite to each other in the width direction of the second conductive sheet 12, with the second through hole 121 open to one side facing the width direction of the second conductive sheet 12. This makes the second weak point 122 of the second conductive sheet 12 easier to break, thereby improving safety. At the same time, providing only one second through hole 121 reduces the number of second through holes 121, thus simplifying the processing of the second conductive sheet 12, improving the processing and production efficiency of the safety device 10, and reducing production costs.

[0103] Alternatively, as shown in Figures 2, 6, and 7, there are two second through holes 121. These two through holes 121 are located at opposite ends of the width direction of the second conductive sheet 12 and are positioned opposite each other in that direction. The sides of the two through holes 121 facing away from each other are open. In this case, the second through holes 121 and the second striking pin 42 are positioned opposite each other in the width direction of the second conductive sheet 12. Therefore, by providing two second through holes 121, the area of ​​the second weak portion 122 of the second conductive sheet 12 is reduced, thereby further reducing the structural strength of the second weak portion 122. This makes the second weak portion 122 of the second conductive sheet 12 easier to break, thus improving safety.

[0104] Alternatively, as shown in Figures 3-5, there are four second through holes 121, which are divided into two groups. Each group includes two second through holes 121 arranged opposite each other in the width direction of the second conductive sheet 12. The two second through holes 121 in each group are located at both ends of the width direction of the second conductive sheet 12, and the side of the two second through holes 121 facing away from each other is open. The two groups of second through holes 121 are spaced apart in the length direction of the second conductive sheet 12, and the second conductive sheet 12 between the two groups of second through holes 121 is constructed as a second weak part 122.

[0105] In some embodiments of this application, as shown in Figures 3-5, there are four second through holes 121 on the second conductive sheet 12. The four second through holes 121 are divided into two groups. Each group includes two second through holes 121 that are disposed opposite each other in the width direction of the second conductive sheet 12. The two second through holes 121 in each group are located at both ends in the width direction of the second conductive sheet 12, and the side of the two second through holes 121 that is away from each other is open. The two groups of second through holes 121 are spaced apart in the length direction of the second conductive sheet 12. The second conductive sheet 12 between the two groups of second through holes 121 is constructed as a second weak part 122.

[0106] Understandably, at this time, the second weak portion 122 of the second conductive sheet 12 and the second striker 42 are arranged opposite to each other in the width direction of the second conductive sheet 12, and the Hall chip 3 cooperates with two of the two second through holes 121. By providing four second through holes 121, the structural strength of the second weak portion 122 of the second conductive sheet 12 is further reduced, making the second weak portion 122 of the second conductive sheet 12 easier to break, thereby improving safety.

[0107] In addition, the second conductive sheet 12 between the two sets of second through holes 121 is configured as a second weak part 122. When the second weak part 122 is broken, it is easier to form a gap between the two sets of second through holes 121, which makes it easier for the second firing pin 42 to extend into the broken part of the second weak part 122 of the second conductive sheet 12. This can further eliminate the electric arc generated after the second weak part 122 of the second conductive sheet 12 breaks, thus improving safety.

[0108] In some embodiments of this application, the Hall chip 3 is a coreless Hall chip 3, or a Hall chip 3 with a magnetic core 3. This allows for a diverse selection of the Hall chip 3, enabling the safety device 10 to be applicable to different scenarios and thus improving its applicability. When a coreless Hall chip 3 is selected, its size is small and it occupies little space, which helps to optimize the size of the safety device 10.

[0109] The following describes the safety device 10 according to specific embodiments one, two, three, four and five of this application. It is worth understanding that the following description is merely exemplary and intended to explain this application, and should not be construed as limiting this application.

[0110] Example 1:

[0111] As shown in Figures 1-9, the safety device 10 according to an embodiment of this application includes: a first conductive sheet 11, a second conductive sheet 12, a third conductive sheet 16, a circuit board 2, a Hall chip 3, a detonation device 4, and a current sensor 5.

[0112] In some embodiments of this application, as shown in Figures 1-9, a first conductive sheet 11 has a first through hole 111 penetrating through the first conductive sheet 11 in the thickness direction of the first conductive sheet 11. A first weak portion 112 is formed at the first through hole 111 in the first conductive sheet 11, and the first weak portion 112 is configured to break upon impact. A Hall chip 3 is disposed on the circuit board 2, with a portion of the Hall chip 3 facing at least a portion of the first through hole 111, or a portion of the Hall chip 3 being inserted into the first through hole 111. The first conductive sheet 11 and a second conductive sheet 12 are spaced apart. The second conductive sheet 12 has a second through hole 121 penetrating through the second conductive sheet 12 in the thickness direction of the second conductive sheet 12. A second weak portion 122 is formed at the second through hole 121 in the second conductive sheet 12, and the second weak portion 122 is configured to break upon impact. A portion of the Hall chip 3 is facing at least a portion of the second through hole 121, or a portion of the Hall chip 3 is at least partially inserted into the second through hole 121. The third conductive sheet 16 is located between the first conductive sheet 11 and the second conductive sheet 12. The third conductive sheet 16 has a third through hole 161 that penetrates the third conductive sheet 16 in the thickness direction. A portion of the Hall chip 3 is disposed opposite to at least a portion of the third through hole 161, or at least a portion of the Hall chip 3 is inserted into the third through hole 161.

[0113] In some embodiments of this application, as shown in Figures 1-9, the detonation device 4 is disposed on the circuit board 2, located between the first conductive sheet 11 and the second conductive sheet 12. The detonation device 4 has a first striking pin 41 and a second striking pin 42. In the arrangement direction of the first conductive sheet 11 and the second conductive sheet 12, the first striking pin 41 and the second striking pin 42 are respectively disposed on opposite sides of the detonation device 4. At least a portion of the first striking pin 41 is an insulating member. The first striking pin 41 is correspondingly disposed to the first conductive sheet 11 and faces the first weak portion 112 of the first conductive sheet 11. The insulating portion of the first striking pin 41 is used to strike the first weak portion 112 of the first conductive sheet 11. The second striking pin 42 faces the second weak portion 122 of the second conductive sheet 12. At least a portion of the second striking pin 42 is an insulating member. The insulating portion of the second striking pin 42 is used to strike the second weak portion 122 of the second conductive sheet 12. The first firing pin 41 includes a first impact post 411 and a second impact post 421. The first impact post 411 and the corresponding first weak portion 112 of the first conductive sheet 11 are arranged opposite each other in the width-upward direction of the first conductive sheet 11. The first conductive sheet 11, the second conductive sheet 12, and the third conductive sheet 16 are located on the same side of the thickness direction of the circuit board 2. At least a portion of the first conductive sheet 11 and at least a portion of the second conductive sheet 12 are stacked with the circuit board 2. The detonation device 4 is located between the third conductive sheet 16 and the circuit board 2. The first conductive sheet 11 and the second conductive sheet 12 are arranged parallel to each other in the thickness direction of the circuit board 2, and the first conductive sheet 11 and the third conductive sheet 16 are staggered in the thickness direction of the circuit board 2. One end of the first conductive sheet 11, the second conductive sheet 12, and the third conductive sheet 16 bends and extends away from the circuit board 2 along the thickness direction of the circuit board 2. The first conductive sheet 11 and the second conductive sheet 12 are arranged closer to the circuit board 2 than the third conductive sheet 16.

[0114] In some embodiments of this application, as shown in Figures 2-7, a current sensor 5 is disposed on and connected to a circuit board 2 for detecting the current signal on a Hall chip 3. The detonation device 4 is configured to detonate and eject a first firing pin 41 to strike the weak part of the corresponding first conductive sheet 11 when the current sensor 5 detects an abnormal current signal on the Hall chip 3.

[0115] Example 2:

[0116] As shown in Figures 3 and 5, the structure of Embodiment 2 is largely the same as that of Embodiment 1. The same structures are shown with the same reference numerals in the figures. The only difference is that there are four first through holes 111. The four first through holes 111 are divided into two groups. Each group includes two first through holes 111 arranged opposite each other in the width direction of the first conductive sheet 11. The two first through holes 111 in each group are located at both ends of the width direction of the first conductive sheet 11, and the side of the two first through holes 111 facing away from each other is open. The two groups of first through holes 111 are spaced apart in the length direction of the first conductive sheet 11. The first conductive sheet 11 between the two groups of first through holes 111 is constructed as a first weak part 112.

[0117] Example 3:

[0118] As shown in Figures 4 and 5, the structure of Embodiment 3 is the same as that of Embodiment 2. The same structures are shown with the same markings in the figures. The only difference is that the outer contour of some of the first through holes 111 is U-shaped and the outer contour of some of the first through holes 111 is V-shaped.

[0119] Example 4:

[0120] As shown in Figure 6, the structure of Embodiment 4 is mostly the same as that of Embodiment 1. The same structures are shown with the same markings in the figures. The only difference is that the first striking pin 41 includes an impact post and a cutting plate. The cutting plate is located on the side of the impact post facing the corresponding first conductive sheet 11. The cutting plate and the first through hole 111 of the corresponding first conductive sheet 11 are arranged opposite to each other in the width direction of the first conductive sheet 11. The cutting plate is perpendicular to the first conductive sheet 11.

[0121] Example 5:

[0122] As shown in Figures 7-9, Embodiment 5 has most of the same structure as Embodiment 1. Identical structures are shown with the same reference numerals in the figures. The only difference is that both the first conductive sheet 11 and the second conductive sheet 12 include a first sub-conductive sheet 13, a second sub-conductive sheet 14, and a third sub-conductive sheet 15 connected sequentially. The first sub-conductive sheet 13, the second sub-conductive sheet 14, and the third sub-conductive sheet 15 are separate manufactured parts. A first through hole 111 is provided on the second sub-conductive sheet 14 of the first conductive sheet 11, and a second through hole 121 is provided on the second sub-conductive sheet 14 of the second conductive sheet 12. The thickness of the first sub-conductive sheet 13 and the third sub-conductive sheet 15 is greater than the thickness of the second conductive sheet 14. The outer contour of the first through hole 111 is V-shaped.

[0123] The motor controller 100 according to an embodiment of the present application is described below with reference to Figures 1 and 10.

[0124] As shown in Figures 1 and 10, the motor controller 100 according to an embodiment of this application includes the aforementioned safety device 10.

[0125] According to the embodiment of the present application, the motor controller 100, by setting the above-mentioned safety device 10, has a first through hole 111 extending through the thickness direction of the first conductive sheet 11. The first conductive sheet 11 forms a first weak part 112 at the first through hole 111. A Hall chip 3 is set on the circuit board 2. Some Hall chips 3 are arranged opposite to at least some of the first through holes 111, or some Hall chips 3 are inserted into the first through hole 111. Thus, the first through hole 111 can serve as a break hole for the first conductive sheet 11, facilitating the disconnection of the first conductive sheet 11 when the current is abnormal. At the same time, the first through hole 111 can also serve as a sampling hole for the Hall chip 3, realizing the dual use of the first through hole 111. This reduces the number of first through holes 111, simplifies the processing of the first conductive sheet 11, improves the processing and production efficiency of the safety device 10, and reduces production costs.

[0126] In some embodiments of this application, the safety device 10 further includes a second conductive sheet 12, a third conductive sheet 16, and a power component. The first conductive sheet 11, the second conductive sheet 12, and the third conductive sheet 16 are configured as three-phase conductive components. One end of the first conductive sheet 11, the second conductive sheet 12, and the third conductive sheet 16 is connected to the power component, and the other end is used to connect to the motor. Thus, the normal operation of the three-phase motor can be achieved.

[0127] In some embodiments of this application, the circuit board 2 is configured as the control board of the motor controller 100. This enables the circuit board 2 to perform a control function, allowing it to control the detonation of the detonating device 4 based on the current signal detected by the Hall chip 3. Thus, the circuit board 2 serves both as a bridge circuit for the Hall chip 3 and as a control function, improving integration.

[0128] The motor assembly 1000 according to an embodiment of this application is described below with reference to FIG10.

[0129] As shown in FIG10, the motor assembly 1000 according to an embodiment of the present application includes the motor controller 100 described above.

[0130] According to the embodiment of the present application, the motor assembly 1000, by setting the motor controller 100 described above, has a first through hole 111 extending through the thickness direction of the first conductive sheet 11. The first conductive sheet 11 forms a first weak part 112 at the first through hole 111. A Hall chip 3 is set on the circuit board 2. Some Hall chips 3 are arranged opposite to at least some of the first through holes 111, or some Hall chips 3 are inserted into the first through hole 111. Thus, the first through hole 111 can serve as a break hole for the first conductive sheet 11, facilitating the disconnection of the first conductive sheet 11 when the current is abnormal. At the same time, the first through hole 111 can also serve as a sampling hole for the Hall chip 3, realizing the dual use of the first through hole 111. This reduces the number of first through holes 111, simplifies the processing of the first conductive sheet 11, improves the processing and production efficiency of the safety device 10, and reduces production costs.

[0131] The vehicle 10000 according to an embodiment of this application is described below with reference to FIG10.

[0132] As shown in FIG10, the vehicle 10000 according to an embodiment of the present application includes the motor assembly 1000 described above.

[0133] According to the vehicle 10000 of the present application embodiment, by setting the above-mentioned motor assembly 1000, a first through hole 111 is provided on the first conductive sheet 11, penetrating the first conductive sheet 11 in the thickness direction of the first conductive sheet 11. The first conductive sheet 11 forms a first weak part 112 at the first through hole 111. A Hall chip 3 is provided on the circuit board 2. Part of the Hall chip 3 is arranged opposite to at least part of the first through hole 111, or part of the Hall chip 3 is inserted into the first through hole 111. Thus, the first through hole 111 can be used as a break hole of the first conductive sheet 11, which facilitates the disconnection of the first conductive sheet 11 when the current is abnormal. At the same time, the first through hole 111 can also be used as a sampling hole of the Hall chip 3, realizing the dual use of the first through hole 111. This reduces the number of first through holes 111, simplifies the processing of the first conductive sheet 11, improves the processing and production efficiency of the safety device 10, and reduces the production cost.

[0134] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0135] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A safety device wherein, The safety device comprises: a first conductive sheet having a first through hole penetrating the first conductive sheet in the thickness direction of the first conductive sheet, the first conductive sheet being formed into a first weak part at the first through hole, the first weak part being configured to break when impacted; a circuit board; a Hall chip disposed on the circuit board, part of the Hall chip being disposed opposite at least part of the first through hole, or part of the Hall chip being at least partially inserted into the first through hole.

2. The safety device of claim 1, wherein, The safety device further comprises: an ignition device disposed on the circuit board, the ignition device having a first striker, at least part of the first striker being an insulating member, the first striker being disposed opposite the first weak part of the first conductive sheet, the insulating part of the first striker being used to impact the first weak part of the first conductive sheet.

3. The safety device of claim 2, wherein, The first striker comprises a first impact column disposed opposite the first weak part in the width direction of the first conductive sheet; or, the first striker comprises a first impact column and a first cutting plate disposed on the side of the first impact column facing the first conductive sheet, the first cutting plate being disposed opposite the first through hole in the width direction of the first conductive sheet, the first cutting plate being perpendicular to the first conductive sheet.

4. The safety device of claim 2 or 3, wherein, The safety device further comprises a current sensor disposed on and connected to the circuit board, for detecting the current signal on the Hall chip, the ignition device being configured to ignite and eject the first striker to impact the weak part of the first conductive sheet when the current sensor detects an abnormal current signal on the Hall chip.

5. The safety device according to any one of claims 2-4, wherein, Further comprising: a second conductive sheet spaced apart from the first conductive sheet, the second conductive sheet having a second through hole penetrating the second conductive sheet in the thickness direction of the second conductive sheet, the second conductive sheet being formed into a second weak part at the second through hole, the second weak part being configured to break when impacted, part of the Hall chip being disposed opposite at least part of the second through hole, or part of the Hall chip being at least partially inserted into the second through hole.

6. The safety device of claim 5, wherein, The ignition device is located between the first conductive sheet and the second conductive sheet, the ignition device further having a second striker, the second striker being disposed opposite the second weak part of the second conductive sheet, at least part of the second striker being an insulating member, the insulating part of the second striker being used to impact the second weak part of the second conductive sheet, the first striker and the second striker being respectively disposed on opposite sides of the ignition device in the arrangement direction of the first conductive sheet and the second conductive sheet.

7. The safety device of claim 5 or 6, wherein, The third conductive sheet is located between the first conductive sheet and the second conductive sheet, and has a third through hole penetrating the third conductive sheet in the thickness direction of the third conductive sheet. Part of the Hall chip is arranged opposite to at least part of the third through hole, or part of the Hall chip is inserted into the third through hole.

8. The safety device of claim 7, wherein, The first conductive sheet, the second conductive sheet and the third conductive sheet are located on the same side of the circuit board in the thickness direction of the circuit board. At least part of the first conductive sheet and at least part of the second conductive sheet are arranged in layers with the circuit board. The detonating device is located between the third conductive sheet and the circuit board. The first conductive sheet and the second conductive sheet are arranged in parallel in the thickness direction of the circuit board. The first conductive sheet and the third conductive sheet are arranged in a staggered manner in the thickness direction of the circuit board.

9. The safety device of claim 7 or 8, wherein, The first through hole has a U-shaped or V-shaped outer contour. The second through hole has a U-shaped or V-shaped outer contour. The third through hole has a U-shaped or V-shaped outer contour.

10. The safety device according to any one of claims 7-9, wherein, One end of the first conductive sheet, the second conductive sheet and the third conductive sheet is bent and extended away from the circuit board in the thickness direction of the circuit board. The first conductive sheet and the second conductive sheet are arranged closer to the circuit board than the third conductive sheet.

11. The safety device according to any one of claims 5-10, wherein, At least one of the first conductive sheet and the second conductive sheet comprises a first sub-conductive sheet, a second sub-conductive sheet and a third sub-conductive sheet connected in sequence. The first sub-conductive sheet, the second sub-conductive sheet and the third sub-conductive sheet are separate processing pieces. The first through hole is arranged on the second sub-conductive sheet of the first conductive sheet, and / or the second through hole is arranged on the second sub-conductive sheet of the second conductive sheet.

12. The safety device of claim 11, wherein, The thickness of the first sub-conductive sheet and the third sub-conductive sheet is greater than the thickness of the second sub-conductive sheet.

13. The guard device of any one of claims 1-12, wherein, The first through hole is one, and the first through hole is open to one side of the first conductive sheet in the width direction of the first conductive sheet. Or, the first through hole is two, and the two first through holes are respectively located at two ends of the first conductive sheet in the width direction of the first conductive sheet and are arranged opposite to each other in the width direction of the first conductive sheet. The two first through holes are open to sides away from each other. Or, the first through hole is four, and the four first through holes are divided into two groups. Each group comprises two first through holes arranged opposite to each other in the width direction of the first conductive sheet. The two first through holes of each group are respectively located at two ends of the first conductive sheet in the width direction of the first conductive sheet and are open to sides away from each other. The two groups of first through holes are spaced apart in the length direction of the first conductive sheet. The first conductive sheet between the two groups of first through holes is configured as the first weak part.

14. The guard device of any one of claims 1-13, wherein, The Hall chip is a Hall chip without a magnetic core, or the Hall chip is a Hall chip with a magnetic core.

15. An electric machine controller, wherein, The safety device comprises the safety device according to any one of claims 1-14.

16. The motor controller of claim 15, wherein, The safety device further comprises a second conductive sheet, a third conductive sheet and a power assembly, the first conductive sheet, the second conductive sheet and the third conductive sheet are configured as a three-phase conductive member, one end of the first conductive sheet, the second conductive sheet and the third conductive sheet is connected to the power assembly, and the other end is used for connecting the motor.

17. The motor controller of claim 16, wherein, The circuit board is configured as a control board of the motor controller.

18. An electric machine assembly, wherein, The motor controller according to any one of claims 15-17.

19. A vehicle, wherein, The motor assembly according to claim 18.

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