Motor controller and powertrain for a vehicle

Abstract

The application relates to the field of motor control, and discloses a motor controller and a power assembly for a vehicle. The motor controller comprises a first shell, a drive control board, a mounting piece and a protective shell. The first shell defines a first accommodating chamber, and the drive control board is arranged in the first accommodating chamber. The mounting piece comprises a mounting piece body and a conductive piece. The mounting piece body is fixed to the first shell, and the conductive piece is arranged on the mounting piece body and comprises a first connecting terminal and a second connecting terminal. The first connecting terminal is electrically connected with the drive control board, and the second connecting terminal is used for being electrically connected with a motor. The protective shell defines a second accommodating chamber, and the protective shell is arranged on the outer side of the second connecting terminal, so that the second connecting terminal is located in the second accommodating chamber. The beneficial effect is that the stability of the motor and the motor controller connection is improved.

Description

Technical Field

[0001] This application relates to the field of motor control, and more particularly to a motor controller and a powertrain for a vehicle. Background Technology

[0002] With the rapid development and expansion of electric vehicle technology, the motor controller, as a crucial component, plays a significant role in the electric vehicle industry. The basic principle of a motor controller is to regulate the motor power supply through electronic devices, thereby altering the motor's operating state. The high-voltage connector serves as the three-phase connection point between the motor and the controller, connecting the controller's copper busbars to the motor's three-phase lines. However, in related technologies, the connection strength between the controller's copper busbars and the motor's three-phase lines is often weak, and the lack of a protective housing makes it prone to short circuits and disconnections with other components, resulting in poor stability of the connection between the controller and the motor. Summary of the Invention

[0003] This application provides a motor controller and a powertrain for a vehicle, which solves the technical problems of low connection strength between the copper busbar of the motor controller and the three-phase wire of the motor, and the lack of a protective housing, which makes it easy to short circuit and disconnect from other components, resulting in poor stability of electric vehicles. It achieves the technical effect of improving the connection stability between the motor and the motor controller.

[0004] To achieve the above objectives, the main technical solutions adopted in this application include:

[0005] In a first aspect, embodiments of this application provide a motor controller, including a first housing, a drive control board, a mounting component, and a protective housing. The first housing defines a first receiving chamber, the drive control board is disposed in the first receiving chamber, the mounting component includes a mounting component body and a conductive component, the mounting component body is fixed to the first housing, the conductive component is disposed in the mounting component body and includes a first connecting terminal and a second connecting terminal, the first connecting terminal is electrically connected to the drive control board, and the second connecting terminal is used for electrical connection to a motor. The protective housing defines a second receiving chamber, and the protective housing is sleeved on the outside of the second connecting terminal so that the second connecting terminal is located in the second receiving chamber.

[0006] The protective housing defines a second receiving chamber and is fitted over the outside of the second connecting terminal so that the second connecting terminal is located within the second receiving chamber. In other words, the protective housing encloses the second connecting terminal, providing a robust physical barrier to prevent direct damage from external physical impacts, dust, moisture, and other environmental factors. This reduces the likelihood of power outages or leakage at the second connecting terminal and improves the stability of the connection between the motor and the motor controller.

[0007] Optionally, the second connecting terminal is connected to the motor wiring harness terminal by fasteners. The first housing, the mounting body, and the protective housing are respectively provided with a first through hole, a second through hole, and a third through hole for the fasteners to pass through. Along the axial direction of the second through hole, the first through hole, the second through hole, and the third through hole are arranged opposite to the second connecting terminal.

[0008] The second connection terminal is connected to the motor's wiring harness terminal via fasteners, which greatly improves the stability of the connection between the second connection terminal and the motor's wiring harness terminal and enhances the reliability of the motor controller's operation. The first through hole, second through hole, and third through hole are positioned opposite to the second connection terminal, which facilitates the installation or maintenance of tools to connect the second connection terminal to the motor's wiring harness terminal via fasteners, significantly improving the efficiency of motor controller installation or maintenance and reducing the cost of motor controller installation or maintenance.

[0009] Optionally, the protective housing is also provided with a fourth through hole for the wire harness terminal to pass through. Both the third and fourth through holes are connected to the second receiving chamber, and the extension direction of the third through hole is different from that of the fourth through hole.

[0010] Both the third and fourth vias are connected to the second receiving chamber. The extension direction of the third via is different from that of the fourth via. On the one hand, this can effectively utilize the space inside the second receiving chamber, improve the space utilization rate inside the second receiving chamber, reduce the overall size of the motor controller, and make the motor controller more compact. On the other hand, it can also enhance the connection stability between the second connection terminal and the motor wiring harness terminal, reduce the probability of connection failure between the second connection terminal and the motor wiring harness terminal, and improve the stability and reliability of the motor controller operation.

[0011] Optionally, a nut is also provided inside the protective housing. The fastener is constructed as a bolt, which passes through the second connecting terminal and the wire harness terminal to engage with the nut. The bolt includes a bolt head and a threaded rod. Along the extension direction of the threaded rod, the bolt head and the nut are respectively located on both sides of the wire harness terminal and the second connecting terminal.

[0012] The bolt passes through the second connecting terminal and the wiring harness terminal to engage with the nut. The bolt head and nut are respectively located on both sides of the wiring harness terminal and the second connecting terminal. On the one hand, the bolt and nut engage to securely fasten the second connecting terminal and the wiring harness terminal, which can reduce the risk of motor controller failure due to loose or broken connections and improve the stability and reliability of the connection between the second connecting terminal and the wiring harness terminal. On the other hand, it also facilitates the maintenance and inspection of the motor controller. When there are signs of loosening between the second connecting terminal and the wiring harness terminal, the nut can be easily retightened without replacing the entire fastener.

[0013] Optionally, the mounting body includes a first mounting portion, a connecting portion, and a second mounting portion. The first mounting portion is fixed to the first housing, a second through hole is disposed in the first mounting portion, the first mounting portion and the second mounting portion are spaced apart in the axial direction of the second through hole, the connecting portion connects the first mounting portion and the second mounting portion, and a conductive element is disposed in the second mounting portion.

[0014] The connecting part connects the first mounting part and the second mounting part. The conductive part is set in the second mounting part, which can collect the fallen fasteners on the connecting part and prevent the fasteners from falling to other parts of the motor controller. This improves the maintenance or assembly efficiency of the motor controller and reduces the probability of motor controller failure.

[0015] Optionally, along the axial direction of the second through hole, the projection of the first mounting part and the projection of the second mounting part do not overlap.

[0016] Along the axial direction of the second through hole, the projection of the first mounting part and the projection of the second mounting part do not overlap, which enables the second connecting terminal provided on the second mounting part to be enveloped by the protective housing, preventing external factors from damaging the connection between the second connecting terminal and the wire harness terminal, and improving the connection stability and reliability between the second connecting terminal and the wire harness terminal.

[0017] Optionally, a portion of the conductive element is embedded in the second mounting portion, and another portion of the conductive element extends out of the second mounting portion to form a second connection terminal.

[0018] One part of the conductive component is embedded in the second mounting part, and the other part of the conductive component extends out of the second mounting part to form a second connection terminal. On the one hand, this can enhance the reliability of the connection between the conductive component and the second mounting part and reduce the probability of power failure or leakage at the conductive component. On the other hand, embedding one part of the conductive component in the second mounting part can significantly improve the space utilization rate inside the motor controller and make the internal structure of the motor controller more compact.

[0019] Optionally, a plurality of spaced-apart stop ribs are also provided between the first mounting part and the connecting part.

[0020] Multiple spaced-apart stop ribs are also provided between the first mounting part and the connecting part. The stop ribs can support the first mounting part and the connecting part, improve the load-bearing capacity of the first mounting part and the connecting part. Without increasing the thickness of the first mounting part or the connecting part, the overall strength is increased by increasing the local strength, thereby saving material, reducing weight, reducing cost, and greatly improving the stability and reliability of the mounting component body structure.

[0021] Optionally, there are multiple second connection terminals, all of which are disposed in the second receiving chamber.

[0022] Multiple second connection terminals are located in the second receiving cavity. The protective housing can provide effective protection for the second connection terminals, reduce the probability of power failure or leakage at the second connection terminals, and improve the stability and reliability of the connection between the second connection terminals and the wire harness terminals.

[0023] Optionally, the first housing is further provided with a cooling chamber for cooling the drive control board, and a plurality of heat-conducting pillars are provided on the side of the drive control board facing the cooling chamber, at least a portion of which extends into the cooling chamber.

[0024] During operation, the motor controller's drive control board generates a significant amount of heat. A cooling chamber for cooling the drive control board is provided on the portion of the first housing corresponding to it. Multiple heat-conducting pillars are positioned on the side of the drive control board facing the cooling chamber, with at least a portion of these pillars located within the cooling chamber. During the cooling process, the cooling chamber contains coolant, and the multiple heat-conducting pillars extend into the coolant, significantly improving the drive control board's heat dissipation capacity, ensuring its performance, and consequently enhancing the stability, reliability, and lifespan of the motor controller.

[0025] Optionally, the cooling chamber has a liquid inlet and a liquid outlet, with the cross-sectional area of ​​the liquid inlet being larger than that of the liquid outlet.

[0026] The cooling chamber is equipped with an inlet and an outlet. Coolant flows into the cooling chamber through the inlet, continuously exchanging heat with the heat-conducting columns. The cross-sectional area of ​​the inlet is larger than that of the outlet. This ensures that the amount of coolant flowing into the cooling chamber is greater than the amount flowing out, thus avoiding the cavity effect (empty cooling chamber). This improves the heat exchange and heat dissipation capacity of the drive and control board, ensuring its performance and ultimately enhancing the stability, reliability, and lifespan of the motor controller.

[0027] Optionally, the first housing is provided with a first set of reinforcing ribs and a second set of reinforcing ribs on the side opposite to the first receiving chamber. Along the thickness direction of the first housing, the first set of reinforcing ribs is arranged opposite to the drive control plate. The height of the first set of reinforcing ribs is greater than the height of the second set of reinforcing ribs. The first housing is also provided with protective ribs and an exhaust valve. The protective ribs are spaced apart from the first set of reinforcing ribs to form a protective chamber. A portion of the exhaust valve extends into the protective chamber.

[0028] The exhaust valve extends into the protective chamber. In other words, along the thickness direction of the first housing, the height of the exhaust valve is lower than the first set of reinforcing ribs and protective ribs. This allows full use of the first set of ribs and protective ribs to protect the exhaust valve and reduce the probability of exhaust valve failure.

[0029] Secondly, embodiments of this application also provide a powertrain for a vehicle, including a motor, a battery, and a motor controller as described in any of the above embodiments, wherein the motor controller is electrically connected to the battery and the motor respectively.

[0030] The powertrain for a vehicle provided in this application includes a motor controller comprising a protective housing defining a second receiving chamber. The protective housing is fitted over the outside of a second connecting terminal so that the second connecting terminal is located within the second receiving chamber. In other words, the protective housing encloses the second connecting terminal, providing a robust physical barrier to prevent direct damage from external physical impacts, dust, moisture, and other environmental factors. This reduces the probability of power outages or leakage at the second connecting terminal and improves the stability of the connection between the motor and the motor controller. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is an exploded view of a motor controller provided in an embodiment of this application;

[0033] Figure 2 This is a schematic diagram of the structure of a motor controller and a motor provided in one embodiment of this application;

[0034] Figure 3 A partial enlarged view of a motor controller provided in an embodiment of this application;

[0035] Figure 4 This is a schematic diagram of the structure of a motor controller and a motor provided in one embodiment of this application;

[0036] Figure 5 This is a schematic diagram of the structure of a motor controller provided in one embodiment of this application;

[0037] Figure 6 for Figure 5 Sectional view in the LL direction;

[0038] Figure 7 for Figure 6 A magnified view of a portion of the image;

[0039] Figure 8 This is a schematic diagram of the structure of an installation component provided in one embodiment of this application;

[0040] Figure 9 A schematic diagram of the structure of the first housing is provided for one embodiment of this application;

[0041] Figure 10 An exploded view of a motor controller according to an embodiment of this application is provided;

[0042] Figure 11 A cross-sectional view of a motor controller provided in an embodiment of this application;

[0043] Figure 12 for Figure 9 Cross-sectional view;

[0044] Figure 13 This is a schematic diagram of the structure of a capacitor assembly provided in an embodiment of this application;

[0045] Figure 14 This is an exploded view of a capacitor assembly provided in an embodiment of this application;

[0046] Figure 15 This is a schematic diagram of the structure of the copper busbar and capacitor core provided in an embodiment of this application;

[0047] Figure 16 The positive electrode copper busbar is shown;

[0048] Figure 17 The negative electrode copper busbar is shown.

[0049] [Explanation of Labels in the Attached Image]

[0050] Motor controller 100; Motor 101; First housing 110; First receiving chamber 110S; First through hole 111; Drive control board 120; Heat-conducting column 121; Mounting component 130; Mounting component body 131; First mounting part 131A; Second mounting part 131B; Connecting part 131C; Conductive component 132; First connecting terminal 132A; Second connecting terminal 132B; Second through hole 133; Wire harness terminal 140; Protective housing 150; Second receiving chamber 150S; Third through hole 151; Fourth through hole 152; Fastener 160; Stop rib 170; Cooling chamber 180; Liquid inlet 181; Liquid outlet 182; Liquid storage chamber 183; First diversion channel 184; Second diversion channel 185; First set of reinforcing ribs 190; Second set of reinforcing ribs 191; Protective rib 200; Exhaust valve 210; Capacitor assembly 2 20; Second housing 221; Positive copper busbar 223; Negative copper busbar 224; Capacitor core 225; Injection molding 226; First body 230; Positive terminal 231; First terminal 231A; Second terminal 231B; Second body 232; Negative terminal 234; Third terminal 234A; Fourth terminal 234B; First through hole 235; Third body 236; Fourth body 237; Third through hole 238; Fourth through hole 239; Core unit 240; Extension 241; Insulating paper 242; Heat sink 245; Reinforcing rib 246; Filter 248; Low-voltage connector 249; Sealing cap 250; First cavity 251; Second cavity 252; Third cavity 253; Fourth cavity 254; Inlet pipe 255; Outlet section 256; Plug 257; Second through hole 258; Sealing ring 259; First connector 260. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0053] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0054] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0056] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0057] With the rapid development and expansion of electric vehicle technology, the three-electric system (battery, motor, and electronic control system) is a crucial component of electric vehicles, and its quality plays a vital role in the overall quality of the vehicle. The battery is the energy source of the electric vehicle, responsible for storing and releasing electrical energy. The motor converts the battery's electrical energy into mechanical energy to drive the vehicle. The electronic control system is the brain of the electric vehicle, responsible for controlling the operation of the battery, motor, and other auxiliary equipment. The electronic control system includes functional modules such as power management, battery management, and motor control, achieving intelligent control of the electric vehicle through real-time monitoring and analysis of various data.

[0058] As a crucial component of electric vehicles, the motor controller plays a significant role in the electric vehicle industry. The basic principle of the motor controller is to regulate the motor power supply through electronic devices, thereby altering the motor's operating state. The high-voltage connector, serving as the three-phase connection point between the motor and the motor controller, primarily functions to transmit high-voltage electrical energy, ensuring the motor controller receives sufficient power to power the motor. It is typically connected by the copper busbars of the motor controller to the three-phase lines of the motor. However, in related technologies, the connection strength between the copper busbars of the motor controller and the three-phase lines of the motor is not high, and the lack of a protective housing makes it prone to short circuits and disconnections with other components, resulting in poor stability of the connection between the motor controller and the motor.

[0059] In view of this, in order to improve the stability of the connection between the motor controller and the motor, this application proposes a motor controller, which includes a first housing, a drive control board, a mounting component, and a protective housing.

[0060] A first housing defines a first receiving chamber. A drive control board is disposed in the first receiving chamber. The mounting component includes a mounting component body and a conductive component. The mounting component body is fixed to the first housing. The conductive component is disposed on the mounting component body and includes a first connecting terminal and a second connecting terminal. The first connecting terminal is electrically connected to the drive control board. The second connecting terminal is used for electrical connection to a motor. A protective housing defines a second receiving chamber. The protective housing is sleeved on the outside of the second connecting terminal so that the second connecting terminal is located in the second receiving chamber.

[0061] In the above scheme, the protective housing defines a second receiving chamber. The protective housing is sleeved on the outside of the second connecting terminal so that the second connecting terminal is located in the second receiving chamber. This can enclose the second connecting terminal in the second receiving chamber, which can protect the connection line at the second connecting terminal and prevent the second terminal from short-circuiting with other components in the motor controller, thereby improving the stability and reliability of the connection between the motor controller and the motor.

[0062] The first housing disclosed in the embodiments of this application may be the housing of a motor controller.

[0063] The driver control board disclosed in this application may include IGBTs. IGBTs (Insulated Gate Bipolar Transistors) are a type of fully controllable voltage-driven power semiconductor device. They combine the advantages of high input impedance of MOSFETs and low on-state voltage drop of GTRs, making them one of the mainstream devices in power electronics.

[0064] The mounting component disclosed in the embodiments of this application can be a high-voltage connector.

[0065] The conductive component disclosed in the embodiments of this application can be a copper busbar.

[0066] For ease of explanation, the following embodiments use a motor controller according to an embodiment of this application as an example.

[0067] Please refer to Figures 1 to 12 , Figure 1 This is an exploded view of a motor controller 100 provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the motor controller 100 and the motor 101 provided in an embodiment of this application; Figure 3 This is a partial enlarged view of a motor controller 100 provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the motor controller 100 and the motor 101 provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a motor controller 100 provided in one embodiment of this application; Figure 6 Figure 5 Sectional view in the LL direction; Figure 7 for Figure 6 A magnified view of a portion of the image; Figure 8 This is a schematic diagram of the structure of the mounting component 130 provided in one embodiment of this application; Figure 9 A schematic diagram of the structure of the first housing 110 is provided for one embodiment of this application; Figure 10 An exploded structural diagram of a motor controller 100 is provided for one embodiment of this application; Figure 11 A cross-sectional view of a motor controller 100 provided in an embodiment of this application; Figure 12 for Figure 9 Cross-sectional view.

[0068] In this embodiment, there is a first housing 110, a drive control board 120, a mounting member 130, and a protective housing 150. The first housing 110 defines a first receiving chamber 110S. The drive control board 120 is disposed in the first receiving chamber 110S. The mounting member 130 includes a mounting member body 131 and a conductive member 132. The mounting member body 131 is fixed to the first housing 110. The conductive member 132 is disposed on the mounting member body 131 and includes a first connecting terminal 132A and a second connecting terminal 132B. The first connecting terminal 132A is electrically connected to the drive control board 120. The second connecting terminal 132B is used for electrical connection to the motor 101. The protective housing 150 defines a second receiving chamber 150S. The protective housing 150 is sleeved on the outside of the second connecting terminal 132B so that the second connecting terminal 132B is located inside the second receiving chamber 150S.

[0069] The first housing 110 defines a first receiving chamber 110S, and the drive control board 120 is disposed within the first receiving chamber 110S. That is, the first housing 110 can enclose the drive control board 120, and the first housing 110 provides a robust physical barrier for the drive control board 120, preventing direct damage to the drive control board 120 from external physical impacts, dust, moisture and other environmental factors. Moreover, the first housing 110 can also shield the drive control board 120 from external electromagnetic field interference, and at the same time reduce the impact of electromagnetic radiation generated by the drive control board 120 itself on the surrounding environment, thereby improving the working stability and reliability of the motor controller 100. Mounting component 130 includes mounting component body 131 and conductive component 132. Mounting component body 131 is fixed to first housing 110. Mounting component body 131 may be disposed within first receiving chamber 110, or it may be enveloped by first housing 110. Conductive component 132 is disposed on mounting component body 131. For example, conductive component 132 may be inserted into mounting component body 131. During the manufacturing process, conductive component 132 may be placed on a mold corresponding to mounting component body 131, and then integral injection molding technology may be used to integrally mold conductive component 132 and mounting component body 131. At least a portion of conductive component 132 is inserted into the interior of mounting component body 131. This can improve the stability of the connection between mounting component body 131 and conductive component 132, reduce the probability of conductive component 132 separating from mounting component body 131, and thus improve the connection stability between motor controller 100 and motor 101.

[0070] The input terminal of the motor controller 100 is electrically connected to the battery, and the output terminal is connected to the motor 101. The motor controller 100 is used to control the rotation of the motor 101. In this embodiment, the conductive component 132 includes a first connection terminal 132A and a second connection terminal 132B. The first connection terminal 132A is electrically connected to the drive control board 120, and the second connection terminal 132B is electrically connected to the motor 101. The drive control board 120 can be an IGBT, which is an insulated gate bipolar transistor. The drive control board 120 is mainly used in the motor controller 100 to convert AC power to DC power to meet the operating needs of the motor 101. The motor controller 100 controls the switching state of the drive control board 120 to achieve precise control of the start, running speed, and stop of the motor 101. Moreover, according to the user's instructions, the motor controller 100 can adjust the switching frequency and duty cycle of the drive control board 120 to control the output torque and speed of the motor 101. The first connection terminal 132A is electrically connected to the drive control board 120, and the second connection terminal 132B is electrically connected to the motor 101. The motor controller 100 can control the motor 101.

[0071] Furthermore, the protective housing 150 defines a second receiving chamber 150S. The protective housing 150 is sleeved on the outside of the second connecting terminal 132B so that the second connecting terminal 132B is located within the second receiving chamber 150S. In other words, the protective housing 150 can enclose the second connecting terminal 132B, providing a robust physical barrier for the second connecting terminal 132B, preventing direct damage to the second connecting terminal 132B from external physical impacts, dust, moisture, and other environmental factors. This reduces the probability of power failure or leakage at the second connecting terminal 132B and improves the stability of the connection between the motor 101 and the motor controller 100. For example, the protective housing 150 can be made of polycarbonate (PC). On one hand, polycarbonate has high impact resistance, effectively protecting the second connection terminal 132B from external impacts. On the other hand, polycarbonate is transparent, allowing direct observation of the second connection terminal 132B through the transparent protective housing 150 when the motor controller 100 malfunctions and requires repair. This enables rapid assessment of whether a fault has occurred at the second connection terminal 132B, significantly improving repair efficiency. Furthermore, polycarbonate has good heat resistance. The second connection terminal 132B typically transmits current, resulting in significant heat generation. Using polycarbonate as the protective housing greatly extends the lifespan of the protective housing 150, thereby increasing the lifespan of the motor controller 100 and improving the stability of the connection between the motor controller 100 and the motor 101.

[0072] In some embodiments, an insulating material may be disposed within the second receiving chamber 150S, which can enclose the second connecting terminal 132B. Exemplarily, the insulating material may be a PVC plastic insulating layer, a cross-linked polyethylene (XLPE) insulating layer, an epoxy resin powder coating, a glass fiber insulating layer, or an adhesive insulating layer. PVC plastic insulating material has advantages such as a smooth appearance, a clean surface, and high strength; XLPE insulating layer is a polymer insulating material with excellent heat resistance and anti-collapse properties, and a long service life; epoxy resin powder coating is a thermosetting dry powder with high mechanical properties, chemical resistance, and temperature resistance; adhesive insulating layer is an adhesive material with good insulating properties, a simple structure, and is easy to assemble and process.

[0073] Please refer to Figures 1 to 12 In this embodiment, the second connecting terminal 132B is connected to the wiring harness terminal 140 of the motor 101 via a fastener 160. The first housing 110, the mounting body 131, and the protective housing 150 are respectively provided with a first through hole 111, a second through hole 133, and a third through hole 151 for the fastener 160 to pass through. Along the axial direction of the second through hole 133, the first through hole 111, the second through hole 133, and the third through hole 151 are arranged opposite to the second connecting terminal 132B.

[0074] The second connection terminal 132B is connected to the wiring harness terminal 140 of the motor 101 via a fastener 160. For example, the second connection terminal 132B is provided with a socket. The wiring harness terminal 140 of the motor 101 extends into the second receiving chamber 150S, corresponding to the socket at the second connection terminal 132B. The wiring harness terminal 140 of the motor 101 is also provided with a socket. The fastener 160 passes through the socket of the second connection terminal 132B and the socket of the wiring harness terminal 140 of the motor 101. The second connection terminal 132B and the wiring harness terminal 140 of the motor 101 are electrically connected via the fastener 160. Moreover, the fastener 160 can firmly fix the second connection terminal 132B and the wiring harness terminal 140 of the motor 101, reducing the probability of the second connection terminal 132B and the wiring harness terminal 140 of the motor 101 falling off and separating, thereby improving the stability of the connection between the motor controller 100 and the motor 101.

[0075] Typically, an installation tool is needed to connect the second connection terminal 132B to the wiring harness terminal 140 of the motor 101. Since the second connection terminal 132B is located inside the first receiving chamber 110S, that is, inside the first housing 110, the installation tool needs to be inserted into the first receiving chamber 110S when it is necessary to install and connect the second connection terminal 132B to the wiring harness terminal 140 of the motor 101. A first through hole 111 is provided on the first housing 110 for a fastener 160 to pass through. The installation tool can enter the first receiving chamber 110S through the first through hole 111, and then connect the second connection terminal 132B to the wiring harness terminal 140 of the motor 101 using the fastener 160. On the one hand, the first through hole 111 can be used to insert the installation tool into the first receiving chamber 110S to connect the second connection terminal 132B to the wiring harness terminal 140 of the motor 101, thereby improving the connection stability between the second connection terminal 132B and the wiring harness terminal 140 of the motor 101 and improving the assembly efficiency of the motor controller 100. On the other hand, when a fault occurs inside the motor controller 100 or when maintenance is required, the installation tool or maintenance tool can be inserted into the motor controller 100 through the first through hole 111 without disassembling the first housing 110, which greatly improves the maintenance or assembly efficiency.

[0076] The mounting body 131 has a second through hole 133 for the fastener 160 to pass through. Along the axial direction of the second through hole 133, the second through hole 133 is opposite to the first through hole 111 and opposite to the second connecting terminal 132B. That is, along the axial direction of the second through hole 133, the positions of the second through hole 133, the first through hole 111, and the second connecting terminal 132B are corresponding. Since the conductive element 132 is disposed on the mounting body 131, and the conductive element 132 includes a first connecting terminal 132A and a second connecting terminal 132B, the second connecting terminal 132B is also connected to the mounting body 131. Therefore, when a fault occurs at the second connecting terminal 132B and repair is required, repair tools can be inserted into the first receiving chamber 110S through the first through hole 111, and then into the second connecting terminal 132B through the second through hole 133, thereby improving repair efficiency.

[0077] Along the axial direction of the second through hole 133, a third through hole 151 provided on the protective housing 150 for the fastener 160 to pass through is disposed opposite to the second connecting terminal 132B. Specifically, the third through hole 151 provided on the protective housing 150 faces the second connecting terminal 132B. The fastener 160 can extend into the second receiving chamber 150S through the third through hole 151 to achieve a fixed connection between the second connecting terminal 132B and the wiring harness terminal 140 of the motor 101.

[0078] Specifically, the second connection terminal 132B is connected to the wiring harness terminal 140 of the motor 101 via fastener 160, which greatly improves the stability of the connection between the second connection terminal 132B and the wiring harness terminal 140 of the motor 101 and improves the reliability of the motor controller 100. The first through hole 111, the second through hole 133, the third through hole 151 are arranged opposite to the second connection terminal 132B, which facilitates the installation or maintenance of tools to connect the second connection terminal 132B and the wiring harness terminal 140 of the motor 101 via fastener 160, which significantly improves the installation or maintenance efficiency of the motor controller 100 and reduces the installation or maintenance cost of the motor controller 100.

[0079] Please refer to Figures 1 to 12 In this embodiment, the protective housing 150 is also provided with a fourth through hole 152 for the wire harness terminal 140 to pass through. Both the third through hole 151 and the fourth through hole 152 are connected to the second receiving chamber 150S. The extension direction of the third through hole 151 is different from that of the fourth through hole 152.

[0080] The protective housing 150 is provided with a fourth through hole 152 for the wire harness terminal 140 to pass through. That is, the wire harness terminal 140 of the motor 101 can extend into the second receiving chamber 150S through the fourth through hole 152. Since the second connecting terminal 132B is connected to the wire harness terminal 140 of the motor 101 through the fastener 160, the second connecting terminal 132B can also extend into the second receiving chamber 150S through the fourth through hole 152. The extension direction of the third through hole 151 is different from the extension direction of the fourth through hole 152. For example, the extension direction of the first via can be perpendicular to the extension direction of the fourth via 152. The second connecting terminal 132B and the wiring harness terminal 140 of the motor 101 extend into the second receiving chamber 150S of the protective housing 150 through the fourth via 152. The fastener 160 can also extend into the second receiving chamber 150S of the protective housing 150 through the third via 151. The fastener 160 is perpendicular to the second connecting terminal 132B and the wiring harness terminal 140 of the motor 101, respectively. The fastener 160 secures the second connecting terminal 132B and the wiring harness terminal 140 of the motor 101. The second connecting terminal 132B is connected and fastened to the wiring harness terminal 140 of the motor 101. Since the fastener 160 is perpendicular to both the second connecting terminal 132B and the wiring harness terminal 140 of the motor 101, the contact area between the fastener 160 and the second connecting terminal 132B or the wiring harness terminal 140 of the motor 101 is the largest, and the friction or fastening force is also relatively large. This can greatly improve the connection stability between the second connecting terminal 132B and the wiring harness terminal 140, and improve the stability and reliability of the motor controller 100 operation. Furthermore, the wire harness terminal 140 enters the second receiving chamber 150S through the fourth through hole 152, and the fastener 160 extends into the receiving chamber through the third through hole 151. The extension direction of the third through hole 151 is different from that of the fourth through hole 152. In other words, the wire harness terminal 140 and the fastener 160 can enter the second receiving chamber 150S through two different directions, which can effectively utilize the space in the second receiving chamber 150S and reduce the probability of dead space (unused space) in the second receiving chamber 150S.

[0081] Specifically, both the third via 151 and the fourth via 152 are connected to the second receiving chamber 150S. The extension direction of the third via 151 is different from that of the fourth via 152. On the one hand, it can effectively utilize the space in the second receiving chamber 150S, improve the space utilization rate in the second receiving chamber 150S, reduce the overall volume of the motor controller 100, and make the motor controller 100 more compact. On the other hand, it can also enhance the connection stability between the second connecting terminal 132B and the wiring harness terminal 140 of the motor 101, reduce the probability of connection failure between the second connecting terminal 132B and the wiring harness terminal 140 of the motor 101, and improve the stability and reliability of the motor controller 100 operation.

[0082] Please refer to Figures 1 to 12 In this embodiment, a nut is also provided inside the protective housing 150, and the fastener 160 is constructed as a bolt. The bolt passes through the second connecting terminal 132B and the wire harness terminal 140 to cooperate with the nut bolt. The bolt includes a bolt head and a screw. Along the extension direction of the screw, the bolt head and the nut are respectively provided on both sides of the wire harness terminal 140 and the second connecting terminal 132B.

[0083] The second connecting terminal 132B and the wire harness terminal 140 may each be provided with holes for the screw to pass through. When the second connecting terminal 132B and the wire harness terminal 140 are fastened together with bolts, the screw is inserted into the second connecting terminal 132B and the wire harness terminal 140 respectively and engages with the nut in the protective housing 150 in the direction away from the bolt head and along the extension of the screw. The bolt head and the nut are respectively located at both ends of the second connecting terminal 132B and the wire harness terminal 140. For example, the bolt head, the second connecting terminal 132B, the wire harness terminal 140 and the nut can be arranged in sequence along the extension direction of the screw.

[0084] Specifically, the bolt passes through the second connecting terminal 132B and the wiring harness terminal 140 to engage with the nut. The bolt head and nut are respectively located on both sides of the wiring harness terminal 140 and the second connecting terminal 132B. On the one hand, the bolt and nut fasten the second connecting terminal 132B and the wiring harness terminal 140, reducing the risk of motor controller 100 malfunction due to loosening or breakage, and improving the stability and reliability of the connection between the second connecting terminal 132B and the wiring harness terminal 140. On the other hand, it also facilitates maintenance and inspection of the motor controller 100. When signs of loosening appear between the second connecting terminal 132B and the wiring harness terminal 140, the nut can be easily retightened without replacing the entire fastener 160. Moreover, when maintenance or replacement of the second connecting terminal 132B and the wiring harness terminal 140 is required, the bolt and nut can be disassembled, allowing for maintenance or replacement of the second connecting terminal 132B and the wiring harness terminal 140.

[0085] In some embodiments, the conductive element 132 is electrically connected to the drive control board 120 via the first connector 260, and the drive control board 120 is electrically connected to the motor 101, thereby enabling the motor controller 100 to control the motor 101. For example, the first connector 260 can be configured as a hexagonal copper stud, which, on the one hand, utilizes the conductivity of copper to electrically connect the drive control board 120 to the conductive element 260, and on the other hand, uses the stud to fix the mounting element 130 inside the motor controller 100.

[0086] In some embodiments, a double-nut system can be provided on the bolt to fasten the second connecting terminal 132B to the wire harness terminal 140. For example, the nuts may include a tightening nut and a lock nut, which can significantly enhance the tightness and stability of the connection. Through the dual cooperation of the tightening nut and the lock nut, the stability and reliability of the connection between the second connecting terminal 132B and the wire harness terminal 140 can be significantly improved. The double-nut system can more precisely control the preload through the interaction of the two nuts, effectively resisting the relaxation effect, thereby ensuring the tightness and stability of the connection.

[0087] In some embodiments, a high-temperature resistant water-absorbing component, such as silicone or water-absorbing resin, can be provided at the third through hole 151. On the one hand, it can absorb the moisture inside the second protective housing 150 to make the air inside the second receiving chamber 150S drier, further reducing the risk of power failure, leakage or short circuit at the second connecting terminal 132B. On the other hand, the high-temperature resistant water-absorbing component itself has a certain volume, which can fully occupy the remaining volume of the third through hole 151, thereby providing support for the second connecting terminal 132B, greatly improving the stability of the connection between the second connecting terminal 132B and the wire harness terminal 140, improving the stability and reliability of the motor 101 control operation, and reducing the probability of motor controller 100 failure.

[0088] Please refer to Figures 1 to 12 In this embodiment, the mounting body 131 includes a first mounting portion 131A, a connecting portion 131C, and a second mounting portion 131B. The first mounting portion 131A is fixed to the first housing 110, and a second through hole 133 is disposed in the first mounting portion 131A. The first mounting portion 131A and the second mounting portion 131B are spaced apart in the axial direction of the second through hole 133. The connecting portion 131C connects the first mounting portion 131A and the second mounting portion 131B, and a conductive element 132 is disposed in the second mounting portion 131B.

[0089] Along the axis of the second through hole 133, the first mounting part 131A and the second mounting part 131B are spaced apart, and the connecting part 131C connects the first mounting part 131A and the second mounting part 131B. That is, the connecting part 131C is located in the middle of the first mounting part 131A and the second mounting part 131B. The first mounting part 131A is fixed to the first housing 110 and is located in the first receiving chamber 110S. Correspondingly, the second mounting part 131B is also located in the first housing 110, and the second mounting part 131B is farther away from the first housing 110 than the first mounting part 131A. Since the conductive element 132 is disposed in the second mounting portion 131B, when the second connecting terminal 132B and the wire harness terminal 140 are assembled and fastened using the fastener 160, the fastener 160 will pass through the first through hole 111 disposed in the first housing 110 and the second through hole 133 disposed in the first mounting portion 131A. Since the second through hole 133 is disposed in the first mounting portion 131A, and the fastener 160 needs to fasten the second connecting terminal 132B and the wire harness terminal 140, that is, when assembling and fastening the second connecting terminal 132B and the wire harness terminal 140, the fastener 160 will pass through the first through hole 111 disposed in the first housing 110 and the second through hole 133 disposed in the first mounting portion 131A. When the 140 is tightened, the fastener 160 will pass through the first mounting part 131A to the second mounting part 131B. Since the first mounting part 131A and the second mounting part 131B are connected by a connecting part 131C, even if the fastener 160 falls off due to various factors, it will fall directly onto the connecting part 131C instead of falling onto other parts of the motor controller 100. This makes it convenient for maintenance or assembly personnel to remove the fastener 160 without having to disassemble the entire first housing 110, which greatly improves the maintenance or assembly efficiency of the motor controller 100.

[0090] Specifically, the connecting part 131C connects the first mounting part 131A and the second mounting part 131B. The conductive element 132 is disposed on the second mounting part 131B, which can collect the fallen fastener 160 on the connecting part 131C, preventing the fastener 160 from falling to other parts of the motor controller 100, improving the maintenance or assembly efficiency of the motor controller 100, and reducing the probability of the motor controller 100 malfunctioning.

[0091] Please refer to Figures 1 to 12 In this embodiment, along the axial direction of the second through hole 133, the projection of the first mounting part 131A and the projection of the second mounting part 131B do not overlap.

[0092] Along the axial direction of the second via 133, the projections of the first mounting portion 131A and the second mounting portion 131B do not overlap. That is, the first mounting portion 131A and the second mounting portion 131B are respectively located on opposite sides of the axial direction perpendicular to the second via 133. Since a conductive element 132 is provided on the second mounting portion 131B, and the conductive element 132 itself has a certain length, the position corresponding to the first mounting portion 131A along the axial direction of the second via 133 can accommodate the conductive element 132. This allows the second connecting terminal 132B to roughly correspond to the second via 133 on its axial direction, improving the internal space utilization of the motor controller 100 and reducing the overall volume of the motor controller 100.

[0093] Furthermore, along the axial direction of the second through hole 133, the projection of the first mounting portion 131A and the projection of the second mounting portion 131B do not overlap, which enables the second connecting terminal 132B provided on the second mounting portion 131B to be enveloped by the protective housing 150, preventing external factors from damaging the connection between the second connecting terminal 132B and the wire harness terminal 140, thereby improving the connection stability and reliability between the second connecting terminal 132B and the wire harness terminal 140.

[0094] Please refer to Figures 1 to 12 In this embodiment, a portion of the conductive element 132 is embedded in the second mounting portion 131B, and another portion of the conductive element 132 extends out of the second mounting portion 131B to form a second connection terminal 132B.

[0095] A portion of the conductive element 132 is disposed inside the second mounting portion 131B, and another portion of the conductive element 132 extends out of the second mounting portion 131B to form a second connecting terminal 132B. The second connecting terminal 132B is connected to the wire harness terminal 140. That is, the connection between the conductive element 132 and the second connecting terminal 132B is not inside the second mounting portion 131B, but outside the second mounting portion 131B. Along the axial direction of the second through hole 133, a support seat is also provided on the connecting portion 131C corresponding to the conductive element 132. The support seat abuts against the portion of the conductive element 132 extending out of the second mounting portion 131B (the second connecting terminal 132B). The support seat can support the conductive element 132, reduce the single-point stress on the conductive element 132, improve the service life of the conductive element 132, reduce the probability of deformation of the conductive element 132, and improve the stability and reliability of the connection between the second connecting terminal 132B and the wire harness terminal 140.

[0096] Furthermore, a portion of the conductive element 132 is embedded in the second mounting portion 131B, and another portion of the conductive element 132 extends out of the second mounting portion 131B to form a second connection terminal 132B. On the one hand, this can enhance the reliability of the connection between the conductive element 132 and the second mounting portion 131B and reduce the probability of power failure or leakage at the conductive element 132. On the other hand, the embedding of a portion of the conductive element 132 into the second mounting portion 131B can significantly improve the space utilization rate inside the motor controller 100, making the internal structure of the motor controller 100 more compact.

[0097] Please refer to Figures 1 to 12 In this embodiment, a plurality of spaced-apart stop ribs 170 are also provided between the first mounting part 131A and the connecting part 131C.

[0098] Multiple spaced-apart stop ribs 170 are also provided between the first mounting part 131A and the connecting part 131C. The stop ribs 170 can support the first mounting part 131A and the connecting part 131C, improve the load-bearing capacity of the first mounting part 131A and the connecting part 131C. Without increasing the thickness of the first mounting part 131A or the connecting part 131C, the overall strength is increased by increasing the local strength, thereby saving material usage, reducing weight, reducing cost, and greatly improving the stability and reliability of the mounting body 131 structure.

[0099] Please refer to Figures 1 to 12 In this embodiment, there are multiple second connection terminals 132B, and all of the multiple second connection terminals 132B are disposed in the second receiving chamber 150S.

[0100] For example, there can be three second connection terminals 132B. The three connection terminals are connected to the wiring harness terminal 140 respectively. The three connection terminals correspond to the three phases of the motor 101, namely the U phase, V phase, and W phase. After complex processing inside the motor controller 100, the current is output to the motor 101. The motor 101 rotates. The multiple second connection terminals 132B are all located in the second receiving chamber 150S. The protective housing 150 can provide effective protection for the second connection terminals 132B, reduce the probability of power failure or leakage at the second connection terminals 132B, and improve the stability and reliability of the connection between the second connection terminals 132B and the wiring harness terminal 140.

[0101] Please refer to Figures 1 to 12 In this embodiment, the first housing 110 is also provided with a cooling chamber 180 for cooling the drive control board 120. A plurality of heat-conducting columns 121 are provided on the side of the drive control board 120 facing the cooling chamber 180, and at least a portion of the heat-conducting columns 121 extends into the cooling chamber 180.

[0102] During operation, the motor controller 100 generates a significant amount of heat in the drive control board 120. A cooling chamber 180 is provided on the first housing 110 corresponding to the drive control board 120 for cooling the drive control board 120. Multiple heat-conducting pillars 121 are arranged on the side of the drive control board 120 facing the cooling chamber 180, with at least a portion of each pillar located within the cooling chamber 180. During the cooling process of the drive control board 120 in the cooling chamber 180, a coolant is provided inside the chamber. The multiple heat-conducting pillars 121 extend into the coolant, significantly improving the heat dissipation capacity of the drive control board 120, ensuring its performance, and consequently enhancing the stability, reliability, and service life of the motor controller 100.

[0103] Please refer to Figures 1 to 12 In this embodiment, the cooling chamber 180 has a liquid inlet 181 and a liquid outlet, and the cross-sectional area of ​​the liquid inlet 181 is larger than the cross-sectional area of ​​the liquid outlet.

[0104] To improve the heat exchange efficiency of the drive control board 120, the coolant inside the cooling chamber 180 is continuously replenished during the operation of the motor controller 100. The cooling chamber 180 is equipped with an inlet 181 and an outlet. The coolant flows into the cooling chamber 180 from the inlet 181 and continuously exchanges heat with the heat-conducting column 121. The cross-sectional area of ​​the inlet 181 is larger than that of the outlet, ensuring that the amount of coolant flowing into the cooling chamber 180 is greater than the amount of coolant draining from the cooling chamber 180. This avoids the cavity effect (no coolant in the cooling chamber 180), improves the heat exchange and heat dissipation capacity of the drive control board 120, ensures the working performance of the drive control board 120, and thus helps to improve the stability, reliability, and service life of the motor controller 100.

[0105] Please refer to Figures 1 to 12 In this embodiment, the first housing 110 is provided with a first set of reinforcing ribs 190 and a second set of reinforcing ribs 191 on the side opposite to the first receiving chamber 110S. Along the thickness direction of the first housing 110, the first set of reinforcing ribs 190 is arranged opposite to the drive control plate 120. The height of the first set of reinforcing ribs 190 is greater than the height of the second set of reinforcing ribs 191. The first housing 110 is also provided with a protective rib 200 and an exhaust valve 210. The protective rib 200 is spaced apart from the first set of reinforcing ribs 190 to form a protective chamber. A portion of the exhaust valve 210 extends into the protective chamber.

[0106] The first housing 110 has a first set of reinforcing ribs 190 and a second set of reinforcing ribs 191 on its side away from the first receiving chamber 110S. That is, the first set of reinforcing ribs 190 and the second set of reinforcing ribs 191 are located on the outer side of the first housing 110. Along the thickness direction of the first housing 110, the first set of reinforcing ribs 190 is positioned opposite to the drive control plate 120. The height of the first set of reinforcing ribs 190 is greater than that of the second set of reinforcing ribs 191. The protective rib 200 is spaced apart from the first set of reinforcing ribs 190 to form a protective chamber. A portion of the exhaust valve 210 extends into the protective chamber. That is, along the thickness direction of the first housing 110, the height of the exhaust valve 210 is lower than that of the first set of reinforcing ribs 190 and the protective rib 200. This allows for full utilization of the first set of reinforcing ribs 190 and the protective rib 200 to protect the exhaust valve 210 and reduce the probability of the exhaust valve 210 malfunctioning. Furthermore, the exhaust valve 210 is protected by the first set of reinforcing ribs 190 and protective ribs 200 provided on the first housing 110, eliminating the need for additional structures to protect the exhaust valve 210. This simplifies the construction of the motor controller 100, saves materials, and reduces the manufacturing and design costs of the motor controller 100.

[0107] Furthermore, the first set of reinforcing ribs 190, the second set of reinforcing ribs 191, and the protective ribs 200 are located on the outside of the first housing 110, which can also change the mode of the first housing 110 of the motor controller 100, thereby changing the sound propagation path and reducing the possibility of resonance, thus helping to improve the noise, vibration, and harshness (NVH) performance of new energy vehicles.

[0108] Please refer to Figures 13 to 17 , Figure 13 This is a schematic diagram of the structure of a capacitor assembly 220 provided in one embodiment of this application; Figure 14 This is an exploded view of the capacitor assembly 220 provided in an embodiment of this application; Figure 15 A schematic diagram of the structure of the copper busbar and capacitor core 225 provided in an embodiment of this application; Figure 16 The positive electrode copper busbar 223 is shown; Figure 17 The negative electrode copper busbar 224 is shown.

[0109] In some embodiments, the motor controller 100 further includes a capacitor assembly 220, which is fixed to the first housing 110. The capacitor assembly 220 includes a second housing 221, copper busbars, and a capacitor core 225. The second housing 221 includes a receiving cavity. The copper busbars include a positive copper busbar 223 and a negative copper busbar 224. The capacitor core 225 is located between the positive copper busbar 223 and the negative copper busbar 224 along the height direction. Both the positive copper busbar 223 and the negative copper busbar 224 are provided with through holes for filling with injection molding compound 226, so that the capacitor core 225, the copper busbars, and the second housing 221 are fixed by the injection molding compound 226.

[0110] When the capacitor core 225, positive copper busbar 223, and negative copper busbar 224 need to be encapsulated within the second housing 221, the positive copper busbar 223, negative copper busbar 224, and capacitor core 225 are all placed within the accommodating space of the second housing 221, so that along the height direction of the capacitor core 225, the capacitor core 225 is located between the positive copper busbar 223 and the negative copper busbar 224, and there are gaps between the capacitor core 225, the positive copper busbar 223, the negative copper busbar 224, and the second housing 221. When liquid injection molding compound 226 is poured and injected above the second housing 221, the injection molding compound 226 flows along... The gaps allow the plastic injection molding material 226 to flow into the accommodating space of the second housing 221 and fill the gaps between the capacitor core 225 and the second housing 221, the positive copper busbar 223 and the second housing 221, and the negative copper busbar 224 and the second housing 221. The injection molding material 226 also flows into the spaces between the positive copper busbar 223 and the capacitor core 225, and between the negative copper busbar 224 and the capacitor core 225 through the through holes in the positive copper busbar 223 and the negative copper busbar 224, filling the gaps between them. After the injection molding material 226 cools, it becomes solid, allowing the capacitor core 225 and the positive and negative copper busbars 224 to be encapsulated within the second housing 221, thereby improving the reliability of the capacitor assembly 220.

[0111] Therefore, through holes are provided on the positive copper busbar 223 and the negative copper busbar 224 so that the liquid injection plastic 226 can flow into the gap between the positive copper busbar 223 and the negative copper busbar 224, the capacitor core 225 and the second housing 221, so as to reduce the generation of voids, which is beneficial to improving the reliability and stability of the connection of each component of the capacitor assembly 220, and thus beneficial to improving the electrical and mechanical performance of the capacitor assembly 220.

[0112] Furthermore, along the height direction of the capacitor core 225, the positive copper busbar 223 and the negative copper busbar 224 are located on both sides of the capacitor core 225, which can reduce the probability of a short circuit between the positive copper busbar 223 and the negative copper busbar 224, and the capacitor core 225 can support the positive copper busbar 223 and the negative copper busbar 224, thereby improving the reliability of the capacitor core 225 and the positive copper busbar 223 and the negative copper busbar 224.

[0113] Please refer to Figures 13 to 17 In some embodiments, the positive electrode copper busbar 223 includes a first body 230 and a positive terminal 231, the negative electrode copper busbar 224 includes a second body 232 and a negative terminal 234, the capacitor core 225 is located between the first body 230 and the second body 232 along the height direction and is connected to both, both the positive terminal 231 and the negative terminal 234 extend out of the receiving space of the second housing 221, the through hole includes a first through hole 235, both the first body 230 and the second body 232 are provided with the first through hole 235, the first body 230 and the capacitor core 225 are welded through the first through hole 235 provided in the first body 230, and the second body 232 and the capacitor core 225 are welded through the first through hole 235 provided in the second body 232.

[0114] The first body 230 of the positive electrode copper busbar 223 is welded to the upper surface of the capacitor core 225 through the first through hole 235, and the second body 232 of the negative electrode copper busbar 224 is welded to the lower surface of the capacitor core 225 through the first through hole 235. This allows the positive electrode copper busbar 223 and the negative electrode copper busbar 224 to be fixed on both sides of the capacitor core 225 along the height direction, improving the reliability of the electrical connection between the capacitor core 225 and the positive and negative electrode copper busbars 224. Simultaneously, the first through hole 235 is provided in both the first body 230 and the second body 232, allowing the injection molding compound 226 to fill the gaps between the first body 230 and the capacitor core 225, and between the second body 232 and the capacitor core 225, thereby improving the reliability of the connection between the capacitor core 225 and the positive and negative electrode copper busbars 224.

[0115] The positive terminal 231 of the positive copper busbar 223 and the negative terminal 234 of the negative copper busbar 224 are used to electrically connect the capacitor core 225 to the battery and the drive control board 120. Specifically, the positive terminal 231 includes a first terminal 231A and a second terminal 231B. The first terminal 231A is used to connect to the positive terminal of the battery, and the second terminal 231B is used to connect to the positive terminal of the drive control board 120. The second terminal 231B is disposed on the first body 230. The negative terminal 234 includes a third terminal 234A and a fourth terminal 234B. The third terminal 234A is used to connect to the negative terminal of the battery, and the fourth terminal 234B is used to connect to the negative terminal of the drive control board 120, so that the capacitor core 225 connected to the positive and negative copper busbars 224 is electrically connected to the battery and the drive control board 120.

[0116] Please refer to Figures 13 to 17 In this embodiment, the positive electrode copper busbar 223 further includes a third body 236 that is perpendicularly connected to the first body 230, and the negative electrode copper busbar 224 further includes a fourth body 237 that is perpendicularly connected to the second body 232. Along the width direction of the capacitor core 225, the capacitor core 225 is located between the third body 236 and the fourth body 237.

[0117] The positive electrode copper busbar 223 also includes a second through hole 258, and the negative electrode copper busbar 224 also includes a third through hole 238 and a fourth through hole 239. The second through hole 258 is located at the connection between the first body 230 and the third body 236, the third through hole 238 is located at the connection between the second body 232 and the fourth body 237, and the fourth through hole 239 is located in the fourth body 237.

[0118] In this embodiment, since the first terminal 231A is narrower along the length of the capacitor assembly 220, the conductive area is increased by setting the first terminal 231A on the third body 236 extending along the height of the capacitor assembly 220. That is, the size of the third body 236 along the length of the capacitor assembly 220 is larger than the size of the first terminal 231A directly set on the first body 230, which helps to reduce the circuit impedance and makes the first terminal 231A have good conductivity. Similarly, since the third terminal 234A and the fourth terminal 234B are relatively narrow along the length of the capacitor assembly 220, their placement on the fourth body 237 extending along the height of the capacitor assembly 220 increases the conductive area. This means the size of the fourth body 237 along the length of the capacitor assembly 220 is larger than the size of the third terminal 234A and the fourth terminal 234B directly mounted on it. This reduces the length of the third terminal 234A and the fourth terminal 234B along the height, thus lowering the circuit impedance and ensuring good conductivity for the third terminal 234A and the fourth terminal 234B. A certain gap should exist between the third body 236 and the fourth body 237 along the height of the capacitor assembly 220 to reduce the risk of interference. While maintaining this gap, the size of the fourth body 237 along the height of the capacitor assembly 220 can be appropriately increased to further improve the conductivity of the third terminal 234A and the fourth terminal 234B.

[0119] Furthermore, gaps may exist between the third body 236 and the fourth body 237 and the sidewall of the capacitor cell, and the third body 236 and the fourth body 237 constrain the capacitor core 225. A second through-hole 258 is provided at the connection between the first body 230 and the third body 236, allowing the injection molding compound 226 to fill the gap between the positive copper busbar 223 and the capacitor core 225 located at the connection between the first body 230 and the third body 236 through the second through-hole 258. The injection molding compound 226 can also flow into the gap between the third body 236 and the sidewall of the capacitor core 225 through the second through-hole 258, thereby reducing the risk of voids forming between the capacitor core 225 and the positive copper busbar 223. The third through-hole 238 is disposed at the connection between the second body 232 and the fourth body 237, allowing the injection molding compound 226 to fill the gap between the negative copper busbar 224 and the capacitor core 225 located at the connection between the second body 232 and the fourth body 237 through the third through-hole 238. Furthermore, the injection molding compound 226 can flow into the gap between the fourth body 237 and the sidewall of the capacitor core through the third through-hole 238, thereby reducing the risk of voids forming between the capacitor core 225 and the negative copper busbar 224. Simultaneously, the fourth through-hole 239 is disposed at the fourth body 237, allowing the injection molding compound 226 to further fill the gap between the fourth body 237 and the sidewall of the capacitor core 225 through the fourth through-hole 239, further reducing the risk of voids forming between the capacitor core 225 and the negative copper busbar 224, and improving the electrical and mechanical properties of the capacitor assembly 220.

[0120] Among them, the first body 230 and the third body 236 of the positive electrode copper busbar 223 can be integrally formed by stamping and bending, and the second body 232 and the fourth body 237 of the negative electrode copper busbar 224 can be integrally formed by stamping and bending.

[0121] In summary, the through holes located around the capacitor core 225 allow the injection molding compound 226 to flow into the gaps between the positive and negative copper busbars 224 and the capacitor core 225 in various directions, greatly improving the reliability of the injection molding compound 226 filling the gaps and thus significantly reducing the risk of voids between the capacitor core 225 and the positive and negative copper busbars 224.

[0122] Please refer to Figures 13 to 17 In some embodiments, the capacitor core 225 includes a plurality of core units 240 distributed along the length direction. The first body 230 and the second body 232 are both provided with a plurality of first through holes 235 spaced apart along the length direction. Each first through hole 235 is used to weld to each core unit 240.

[0123] In this embodiment, the capacitor core 225 has multiple individual cores 240 along its length. The capacitor core 225 is installed inside a housing, so that all the multiple individual cores 240 are located within the housing. Compared with the traditional method of soldering multiple individual capacitors separately onto a PCB board, the multiple individual cores 240 located within the second housing 221 in this application can improve the integration level of the capacitor assembly 220. At the same time, both the first body 230 and the second body 232 are provided with multiple first through holes 235 spaced apart along their length, so that the extensions 241 in each first through hole 235 can be soldered to each individual core 240, further improving the stability and reliability of the soldering between the positive and negative copper busbars 224 and each individual core 240.

[0124] In addition, the injection molding material 226 can flow into the gap between each core cell 240 through the aforementioned through holes, thereby reducing the risk of voids in the core cell 240 and improving the electrical and mechanical properties of the capacitor core 225.

[0125] Please refer to Figures 13 to 17 In some embodiments, the second housing 221 is provided with a blocking portion for separating adjacent positive terminals 231 and negative terminals 234.

[0126] In this embodiment, the second housing 221 is provided with a blocking portion extending along the height direction of the capacitor core 225. The blocking portion can separate the first terminal 231A of the positive terminal 231 and the third terminal 234A of the negative terminal 234, reducing the risk of creepage between the first terminal 231A and the third terminal 234A along the length direction of the capacitor core 225, which is beneficial to improving the reliability and safety of the capacitor assembly 220.

[0127] Please refer to Figures 13 to 17 In some embodiments, insulating paper 242 is provided between the positive copper busbar 223 and the negative copper busbar 224 along the width direction.

[0128] In this embodiment, along the width direction of the capacitor core 225, the insulating paper 242 is used to separate the positive terminal 231 of the positive copper busbar 223 and the negative terminal 234 of the negative copper busbar 224, reducing the risk of creepage between the positive terminal 231 and the negative terminal 234 along the width direction, thereby reducing the risk of short circuit within the capacitor assembly 220 and improving the safety of the capacitor assembly 220.

[0129] Furthermore, along the height direction of the capacitor core 225, the positive copper busbar 223 and the negative copper busbar 224 are located on both sides of the capacitor core 225. Compared to having both the positive and negative copper busbars 224 located on one side of the capacitor core 225, this reduces the amount of insulating paper 242 used between the positive copper busbar 223 and the negative copper busbar 224, thereby reducing production costs and preventing the inconvenience caused by arranging a large amount of insulating paper 242, which could lead to reduced assembly efficiency.

[0130] Please refer to Figures 13 to 17 In some embodiments, the capacitor assembly 220 further includes a heat sink 245 mounted on the second housing 221. The bottom wall of the second housing 221 is provided with a first opening, through which the heat sink 245 dissipates heat. An insulating paper 242 is provided between the heat sink 245 and the negative electrode copper busbar 224.

[0131] In this embodiment, the heat sink 245 can be a heat sink aluminum plate. The heat sink aluminum plate has good thermal conductivity and can dissipate heat through the first opening, thereby reducing the operating temperature of the capacitor assembly 220 and improving its performance and lifespan. Simultaneously, due to the good electrical conductivity of the heat sink aluminum plate, an insulating paper 242 is provided between the heat sink 245 and the negative copper busbar 224, further reducing the risk of short circuits in the capacitor assembly 220 and improving its safety. Furthermore, the negative copper busbar 224 and the positive copper busbar 223 are located on opposite sides of the capacitor core 225; that is, when the negative copper busbar 224 is located at the bottom of the capacitor core 225, it can dissipate heat through the heat sink 245 located at the bottom of the second housing 221, thereby reducing its temperature and improving the operational stability of the capacitor core 225.

[0132] Please refer to Figures 13 to 17 In some embodiments, reinforcing ribs 246 are provided in the accommodating space of the second housing 221 to improve the strength of the second housing 221.

[0133] Please refer to Figures 1 to 12 In some embodiments, the drive control board 120 includes a board body, control elements, and drive elements. The board body is fixed to the first housing 110. The control elements and drive elements are integrated on the board body. The drive elements are used to provide power to the motor 101, and the control elements are used to control the working state of the motor 101. In this embodiment, the drive elements and control elements are provided on the board body to integrate the traditional control board and drive board into a drive control board 120 with the functions of motor 101 and controlling motor 101. This helps to reduce the number of printed circuit boards (PCBs) used to install drive elements and control elements in the motor controller 100, thereby reducing the space occupied by the drive unit and control unit in the motor controller 1001, improving the integration level in the motor controller 100, reducing the size, and thus making the motor controller 100 smaller and lighter.

[0134] In some embodiments, the control elements on a conventional control board are integrated into the gaps between the drive elements in the drive board, so that the drive board with control elements and drive elements is formed as the drive control board 120 of this application, thereby facilitating manufacturing. At the same time, the drive elements and control elements can be arranged on both sides of the board body along the thickness direction, saving arrangement space, which in turn helps to reduce the board body volume and further improve the integration level within the motor controller 100.

[0135] In some embodiments, the motor controller 100 includes a filter 248. Along the length of the motor controller 100, the mounting component 130, the drive control board 120, the capacitor assembly 220, and the filter 248 are sequentially disposed inside the motor controller 100. In this embodiment, the filter 248 is used to reduce electromagnetic interference and improve the output waveform quality, the capacitor assembly 220 is used to store energy and smooth the voltage, and the drive control board 120 is used to efficiently convert and control the current.

[0136] The mounting component 130, drive control board 120, capacitor assembly 220 and filter 248 are sequentially arranged inside the motor controller 100 along its length. This helps to reduce the size of the motor controller 100 along its width, making the system path inside the motor controller 100 the shortest, which helps to save layout space, and makes the input end (filter 248 is electrically connected to the high voltage DC line of the battery) and the output end (second connection terminal 132B is connected to the wiring harness terminal 140 of the motor 101) of the motor controller 100 arranged along the minimum path.

[0137] Please refer to Figures 1 to 12 In this embodiment, the motor controller 100 further includes a low-voltage connector 249, an exhaust valve 210, a sealing cap 250, and a plug 257. The low-voltage connector 249 is integrated on the drive control board 120 and is used to connect the vehicle and the motor controller 100 signals. The exhaust valve 210, the sealing cap 250, and the plug 257 are all installed on the first housing 110. The exhaust valve 210 is used for waterproofing and ventilation and balancing the internal and external pressure difference of the motor controller 100. The sealing cap 250 is used to seal the conductive part 132 connected to the motor 101. The plug 257 seals the wiring hole to seal the high-voltage DC line connected to the power battery.

[0138] Please refer to Figures 1 to 12The first receiving chamber 110S includes a first cavity 251, a second cavity 252, a third cavity 253, and a fourth cavity 254 distributed along the length of the motor controller 100. A filter 248 is housed in the first cavity 251, a capacitor assembly 220 is housed in the second cavity 252, at least a portion of the drive control board 120 extends into the third cavity 253, and a mounting member 130 is housed in the fourth cavity 254. This design improves the space utilization of the motor controller 100, reduces the size of the motor controller 100, and makes the motor controller 100 more portable.

[0139] In this embodiment, along the thickness direction of the motor controller 100, the depth of the second cavity 252 is greater than the depths of the first cavity 251, the third cavity 253, and the fourth cavity 254. Since the thickness of the capacitor assembly 220 is greater than the thickness of the filter 248, the drive control board 120, and the mounting component 130, the depth of the second cavity 252 is greater than the depths of the first cavity 251, the third cavity 253, and the fourth cavity 254. This ensures that after the capacitor assembly 220, the drive control board 120, the filter 248, and the mounting component 130 are installed in the first housing 110, the height difference between the components within the first receiving chamber 110 is small. The depth of the second cavity 252 is greater than the depth of the first cavity 251, and the depth of the first cavity 251 is also... The depth of the first receiving chamber 110S is greater than that of the third cavity 253, which in turn is greater than that of the fourth cavity 254. This makes the cross-section of the first receiving chamber 110S stepped, which helps to improve the strength of the first housing 110 and also changes the mode of the first housing 110 of the motor controller 100, thereby changing the sound propagation path and reducing the possibility of resonance. This helps to improve the noise, vibration, and harshness (NVH) performance of new energy vehicles.

[0140] The size of the first cavity 251 is smaller than the size of the second cavity 252, the third cavity 253 and the fourth cavity 254.

[0141] In this embodiment, along the width direction of the motor controller 100, the size of the first cavity 251 is smaller than that of the first cavity 251 and the third cavity 253, and the size of the first cavity 251 is smaller than that of the fourth cavity 254. This makes the size of each cavity along the width direction of the motor controller 100 match the size of each component it houses, which helps to reduce the size of the first housing 110 along the width direction, and further helps to reduce the size of the motor controller 100 along the width direction, thereby improving the integration level of each component in the motor controller 100.

[0142] Please refer to Figures 1 to 12In some embodiments, the cooling chamber 180 includes a second opening, and a sealing ring 259 is provided on the outer periphery of the second opening. The heat-conducting column 121 extends into the cooling chamber 180 through the second opening. The drive control plate 120 can press the sealing ring 259 to reduce the risk of coolant leakage and improve the safety of the motor controller 100.

[0143] In some embodiments, the cooling chamber 180 includes a liquid storage chamber 183, a first diversion channel 184, a second diversion channel 185, a liquid inlet 181, and a liquid outlet 182. The first diversion channel 184 communicates with the liquid inlet 181 and the liquid storage chamber 183, and the second diversion channel 185 communicates with the liquid outlet 182 and the liquid storage chamber 183. The liquid inlet 181 and the liquid outlet 182 are located on both sides of the liquid storage chamber 183 and are diagonally arranged. The first diversion channel 184 and the second diversion channel 185 are located on both sides of the liquid storage chamber 183 and are diagonally arranged.

[0144] The first housing 110 is also connected to an inlet pipe for supplying coolant to the cooling chamber. The coolant flows into the first distribution channel 184 through the inlet 181, then into the storage chamber 183 through the first distribution channel 184, and then into the second distribution channel 185 through the storage chamber 183. Subsequently, the coolant flows into the outlet 182 through the second distribution channel 185. Therefore, the inlet 181 and outlet 182 are located on opposite sides of the storage chamber 183 and are diagonally arranged, which helps to increase the resistance to the flow of coolant in the storage chamber 183, reduce the flow rate of coolant in the storage chamber 183, and increase the residence time of coolant in the storage chamber 183, thereby improving the heat dissipation effect on the drive control board 120. Meanwhile, the first diversion channel 184 and the second diversion channel 185 are located on both sides of the liquid storage chamber 183 and are arranged diagonally to extend the path of the coolant along the length of the motor controller 100 and improve the uniformity of heat dissipation from the coolant to the drive control board 120. In addition, the liquid inlet 181 is located in the middle of the motor controller 100 along the height direction, which facilitates venting during the filling of coolant.

[0145] The first housing 110 is also provided with a liquid outlet 256. Along the height direction of the motor controller 100, the liquid outlet 256 is located above the liquid outlet 182 and the liquid inlet 181 so that the coolant can fill the entire liquid storage chamber 183, further improving the heat dissipation capacity of the drive control board 120.

[0146] The cooling chamber 180 is rectangular, with the inlet 181 and outlet 182 located on the first diagonal of the cooling chamber 180, and the first diversion channel 184 and the second diversion channel 185 located on the second diagonal of the cooling chamber 180. This is beneficial to improve the path of the coolant along the length of the motor controller 100, and further improve the heat dissipation effect of the cooling chamber 180 on the drive control board 120.

[0147] This application also provides a powertrain for a vehicle, including a motor 101, a battery, and a motor controller 100 as described in any of the above embodiments, wherein the motor controller 100 is electrically connected to the battery and the motor 101 respectively.

[0148] The powertrain for a vehicle provided in this application embodiment includes a motor controller 100 comprising a protective housing 150. The protective housing 150 defines a second receiving chamber 150S. The protective housing 150 is sleeved on the outside of a second connecting terminal 132B, such that the second connecting terminal 132B is located within the second receiving chamber 150S. In other words, the protective housing 150 can enclose the second connecting terminal 132B, providing a robust physical barrier to prevent direct damage to the second connecting terminal 132B from external physical impacts, dust, moisture, and other environmental factors. This reduces the probability of power outages or leakage at the second connecting terminal 132B and improves the stability of the connection between the motor 101 and the motor controller 100.

[0149] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0150] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0151] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0152] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An electric motor controller characterized by, The application relates to a motor control device. The motor control device comprises a first shell defining a first accommodating chamber, a drive control board arranged in the first accommodating chamber, a mounting member comprising a mounting member body fixed to the first shell and a conductive member arranged in the mounting member body and comprising a first connecting terminal electrically connected to the drive control board and a second connecting terminal for electrically connecting to a motor, and a protective shell defining a second accommodating chamber, the protective shell being sleeved on the outside of the second connecting terminal so that the second connecting terminal is located in the second accommodating chamber. The second connecting terminal is connected to a wire harness terminal of the motor through a fastener. The first shell, the mounting member body and the protective shell are respectively provided with a first through hole, a second through hole and a third through hole for the fastener to pass through, and the first through hole, the second through hole and the third through hole are oppositely arranged with the second connecting terminal along the axial direction of the second through hole. The mounting member body comprises a first mounting part fixed to the first shell, a connecting part and a second mounting part, and the second through hole is arranged in the first mounting part. The first mounting part and the second mounting part are spaced apart along the axial direction of the second through hole, the connecting part connects the first mounting part and the second mounting part, and the conductive member is arranged in the second mounting part. The protective shell is further provided with a fourth through hole for the wire harness terminal to pass through, the third through hole and the fourth through hole are both in communication with the second accommodating chamber, and the extension direction of the third through hole is different from that of the fourth through hole. The protective shell is further provided with a nut, the fastener is configured as a bolt, and the bolt passes through the second connecting terminal and the wire harness terminal to be screwed with the nut. The bolt comprises a bolt head and a screw rod, and the bolt head and the nut are arranged on the two sides of the wire harness terminal and the second connecting terminal along the extension direction of the screw rod.

2. The motor controller of claim 1, wherein, The projection of the first mounting part along the axial direction of the second through hole does not overlap with the projection of the second mounting part.

3. The motor controller of claim 1, wherein, Part of the conductive member is embedded in the second mounting part, and another part of the conductive member protrudes out of the second mounting part to form the second connecting terminal. A plurality of spaced-apart stop ribs are arranged between the first mounting part and the connecting part.

4. The motor controller of claim 1, wherein, The second connecting terminal is a plurality of second connecting terminals, and the plurality of second connecting terminals are all arranged in the second accommodating chamber.

5. The motor controller of claim 4, wherein, The first shell is further provided with a cooling chamber for cooling the drive control board.

6. The motor controller of claim 1, wherein, The drive control board is provided with a plurality of heat-conducting columns on the side facing the cooling chamber, and at least part of the heat-conducting columns protrudes into the cooling chamber.

7. The motor controller of any one of claims 1-6, wherein, The cooling chamber has a liquid inlet and a liquid outlet, and the cross-sectional area of the liquid inlet is larger than that of the liquid outlet.

8. The motor controller of claim 1, wherein, ​ ​ 9. The motor controller of claim 8, wherein, ​ 10. The motor controller of claim 1, wherein, The side of the first shell away from the first accommodating cavity is provided with a first set of reinforcing ribs and a second set of reinforcing ribs, the first set of reinforcing ribs is arranged opposite to the control board along the thickness direction of the first shell, and the height of the first set of reinforcing ribs is greater than the height of the second set of reinforcing ribs; The first shell is further provided with a protection rib and an exhaust valve, the protection rib is spaced apart from the first set of reinforcing ribs to form a protection cavity, and part of the exhaust valve extends into the protection cavity.

11. A powertrain for a vehicle, characterized by, The electric machine, the battery and the electric machine controller according to any one of claims 1-10 are electrically connected with the battery and the electric machine respectively.

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