Electric control box body, electric assembly, electronic device and vehicle

Abstract

The utility model relates to an electric control box body, an electric assembly, an electronic device and a vehicle. Wherein the electric control box body comprises a shell, a ventilation valve and a retaining wall. A first accommodating cavity is formed in the shell and is used for accommodating an electronic device; the ventilation valve is arranged on the side wall of the shell in a penetrating mode so as to communicate the first containing cavity with the space outside the shell. The retaining wall is arranged in the first containing cavity and used for being arranged between the ventilation valve and the electronic device. According to the technical scheme, the retaining wall has a shielding effect on the ventilation valve, direct impact of impact waves and comburent on the ventilation valve when thermal runaway occurs in the shell is avoided, the ventilation valve is prevented from being separated from the shell, and therefore the comburent can be limited in the shell, and the safety of the electric control box body is improved.

Description

[0001] Priority declaration

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on September 24, 2024, with application number 202422343020.0. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of motor control technology, and in particular to an electric control box, an electric assembly, an electronic device and a vehicle. Background Art

[0004] Breather valves are commonly found in sealed box-shaped mechanical or electronic devices. This is because sealed boxes often contain gas, and the pressure of the gas inside can differ significantly from atmospheric pressure. Without a breather valve, a significant pressure difference between the box's internal pressure and atmospheric pressure can damage the box's seal, causing it to fail. In mechanical devices, seal failure can cause internal gears to rust and oil to emulsify. In electronic devices, it can cause internal wiring to rust due to moisture or even cause a short circuit.

[0005] The electronic control box filters the external DC power supply before converting it into AC power, which is then fed into the motor to power it. To protect the internal electronic components, the electronic control box also requires a sealed box structure, and therefore is equipped with a vent valve. However, compared to typical electronic components, the electronic control box has its own unique features. Specifically, the large internal capacitors that filter the power supply and the power components that invert the power supply generate high heat and are prone to explosion in the event of thermal runaway.

[0006] While vent valves can withstand significant pressure differentials and can quickly vent gases to maintain a stable seal even if the pressure inside the electronic control box suddenly increases, the situation presents a different challenge when a component explodes. The explosion generates shock waves and debris, which, with their high momentum, can directly impact the vent valve, potentially even knocking it off the enclosure. The resulting flames and burning combustibles could then burst through the holes where the vent valve is installed and exit the control box. Since the exterior of an electronic control box is often adjacent to flammable materials such as wiring harnesses, water pipes, and sound insulation, the flames and burning combustibles could ignite these materials, making the control box highly dangerous. Utility Model Content

[0007] The embodiments of the present application provide an electric control box, an electric assembly, an electronic device, and a vehicle, which improve the safety of the electric control box and at least partially solve the above-mentioned technical problems.

[0008] In order to achieve the above-mentioned object, according to a first aspect of the present application, an electric control box is provided, comprising:

[0009] The housing is formed with a first accommodating cavity;

[0010] a vent valve, disposed through the shell, the vent valve communicating with the first accommodating cavity and the outside of the shell;

[0011] A retaining wall is provided in the first accommodating cavity, wherein a projection of the retaining wall on the shell along the axial direction of the breathable valve covers the breathable valve.

[0012] Optionally, the retaining wall and the shell are integrally formed.

[0013] Optionally, the retaining wall is provided with an air vent, and the air vent and the air valve are staggered.

[0014] Optionally, the electric control box further includes a bus capacitor, which is installed in the first accommodating cavity and includes:

[0015] The capacitor box is formed with a second accommodating cavity;

[0016] a smoothing capacitor, installed in the second accommodating cavity;

[0017] The first filter magnetic ring is installed in the second accommodating cavity.

[0018] Optionally, the busbar capacitor further includes a second filter magnetic ring, which is installed in the second accommodating cavity; the first filter magnetic ring includes a nanocrystalline magnetic ring, and the second filter magnetic ring includes a ferrite magnetic ring.

[0019] Optionally, the bus capacitor further includes a first XY capacitor group and a second XY capacitor group; the first XY capacitor group and the second XY capacitor group are connected in parallel; the first filter magnetic ring is arranged at the input end of the first XY capacitor group and the second XY capacitor group; the second filter magnetic ring is arranged between the first XY capacitor group and the second XY capacitor group; the first XY capacitor group and the second XY capacitor group are installed in the second accommodating cavity.

[0020] Optionally, the electrical control box is used to be electrically connected to the motor; wherein, the shell is used to be installed on one radial side of the motor; the shell protrudes in the direction of the output shaft of the gearbox driven by the motor to form a capacitor accommodating portion in the first accommodating cavity, and the bus capacitor is installed in the capacitor accommodating portion.

[0021] Optionally, a side of the smoothing capacitor facing the output shaft is arranged parallel to the bottom wall of the housing.

[0022] Optionally, the electrical control box also includes a drive control integrated board, a first connecting piece and a second connecting piece; the drive control integrated board is arranged on the side of the bus capacitor facing away from the shell; the bus capacitor also includes a high-voltage sampling positive copper bus and a high-voltage sampling negative copper bus; the high-voltage sampling positive copper bus is electrically connected to the positive pole of the smoothing capacitor, and the high-voltage sampling negative copper bus is electrically connected to the negative pole of the smoothing capacitor; the first connecting piece simultaneously passes through the drive control integrated board and the high-voltage sampling positive copper bus to be connected to the capacitor box; the second connecting piece simultaneously passes through the drive control integrated board and the high-voltage sampling negative copper bus to be connected to the capacitor box.

[0023] Optionally, the busbar capacitor further includes a positive busbar and a negative busbar; the positive busbar is electrically connected to the positive electrode of the smoothing capacitor; the negative busbar is electrically connected to the negative electrode of the smoothing capacitor; the positive busbar and the negative busbar are arranged on both sides of the smoothing capacitor and are arranged opposite to each other.

[0024] Optionally, the electrical control box also includes a DC bus; the DC bus includes a wire and a connector, the wire passes through the connector to be electrically connected to the bus capacitor, and the connector is connected to the shell; the input direction of the connector and the output direction of the connector are set at an angle.

[0025] Optionally, the electric control box is used to be installed on a vehicle; the line input direction of the connector is along the width direction of the vehicle, and the line output direction of the connector is along the length direction of the vehicle.

[0026] Optionally, the electrical control box also includes a shielding cover and a low-voltage filter board connector assembly; the low-voltage filter board connector assembly is installed in the first accommodating cavity, and the shielding cover is arranged on the low-voltage filter board connector assembly, and the shielding cover, the low-voltage filter board connector assembly and the shell are enclosed to form a shielding compartment.

[0027] Optionally, the electric control box further comprises a three-phase magnetic ring terminal block, the three-phase magnetic ring terminal block is provided through the housing, and the electric control box further comprises a third filter magnetic ring, the third filter magnetic ring is provided at the output end of the three-phase magnetic ring terminal block; and / or

[0028] The electric control box further comprises a first sealing ring, which is arranged at the matching position between the three-phase magnetic ring terminal block and the shell.

[0029] Optionally, the electric control box further includes a resolver connector and a second sealing ring, the resolver connector is inserted into the three-phase magnetic ring terminal block, and the second sealing ring is arranged at the matching position between the resolver connector and the three-phase magnetic ring terminal block.

[0030] Optionally, a projection of the retaining wall on the electrical control box along the axial direction of the ventilation valve at least partially covers the ventilation valve.

[0031] According to a second aspect of the present application, an electric assembly is provided, comprising the above-mentioned electric control box.

[0032] According to a third aspect of the present application, an electronic device is also provided, comprising the above-mentioned electric control box or the above-mentioned electric assembly.

[0033] According to a fourth aspect of the present application, a vehicle is also provided, comprising the above-mentioned electric control box or the above-mentioned electric assembly or the above-mentioned electronic device.

[0034] In the electronic control box of the embodiment of the present application, a retaining wall is provided within the first accommodating cavity formed by the housing. Thus, when the electronic components within the housing experience thermal runaway and begin to explode, the shock wave or burning materials are blocked by the retaining wall and cannot directly impact the vent valve. As can be seen from the above, the retaining wall makes it difficult for the vent valve to be pushed away from the housing by shock waves and burning materials. When thermal runaway occurs within the housing, the burning materials are confined within the housing and will not ignite flammable materials outside the electronic control box, thereby improving the safety of the electronic control box.

[0035] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0037] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0038] Figure 1 is a schematic structural diagram of a housing of an electric control box provided in an exemplary embodiment of the present disclosure;

[0039] Figure 2 yes Figure 1 A magnified schematic diagram of part A;

[0040] Figure 3 yes Figure 1 A schematic diagram of an exploded structure of an electric control box provided in an exemplary embodiment;

[0041] Figure 4 yes Figure 1A schematic structural diagram of an electric control box with the electric control upper cover removed provided in an exemplary embodiment;

[0042] Figure 5 yes Figure 4 Schematic diagram of the cross section in the middle BB direction;

[0043] Figure 6 yes Figure 5 An enlarged schematic diagram of part D in the middle;

[0044] Figure 7 yes Figure 5 A magnified schematic diagram of part E;

[0045] Figure 8 yes Figure 4 Schematic diagram of the cross section in the CC direction;

[0046] Figure 9 yes Figure 8 A magnified schematic diagram of part F;

[0047] Figure 10 yes Figure 8 An enlarged schematic diagram of part G in FIG;

[0048] Figure 11 yes Figure 1 A schematic diagram of an exploded structure of a busbar capacitor of an electric control box provided in an exemplary embodiment;

[0049] Figure 12 yes Figure 1 A schematic diagram of the assembly structure of the busbar capacitor of the electric control box provided in an exemplary embodiment;

[0050] Figure 13 yes Figure 1 A topological diagram of the busbar capacitor of the electric control box provided in an exemplary embodiment;

[0051] Figure 14 is a schematic diagram of the structure of an electric assembly provided in an exemplary embodiment of the present disclosure from a top view;

[0052] Figure 15 yes Figure 14 Schematic diagram of the cross section in the HH direction;

[0053] Figure 16 is a schematic diagram of a three-dimensional structure of an electric powertrain provided in an exemplary embodiment of the present disclosure;

[0054] Figure 17 yes Figure 1 Schematic diagram of the exploded structure of the resolver connector, three-phase magnetic ring terminal block and shell of the electric control box provided in an exemplary embodiment.

[0055] Description of reference numerals:

[0056] 100, housing; 110, first accommodating cavity; 111, capacitor accommodating portion; 200, vent valve; 300, retaining wall; 301, shielding portion; 302, connecting portion; 400, vent cavity; 410, vent port; 500, busbar capacitor; 510, capacitor box; 520, smoothing capacitor; 530, first filter magnetic ring; 540, second filter magnetic ring; 550, first XY capacitor group; 551, first X capacitor; 552, first Y capacitor; 553, first Two Y capacitors; 560, second XY capacitor group; 561, second X capacitor; 562, third Y capacitor; 563, fourth Y capacitor; 571, high voltage sampling positive copper bus; 572, high voltage sampling negative copper bus; 581, positive bus bus; 582, negative bus bus; 590, schematic diagram of the glue filling surface; 5101, capacitor positive input copper bus; 5102, capacitor negative input copper bus; 5111, capacitor positive output copper bus; 5112, capacitor negative output copper bus 5120, glue-filled sealing baffle; 5131, first grounding copper busbar; 5132, second grounding copper busbar; 5140, insulation and pressure-resistant partition; 610, motor front housing; 710, output shaft; 720, gearbox housing; 800, drive control integrated board; 910, first connecting piece; 920, second connecting piece; 1010, wire; 1020, connector; 1100, shielding cover; 1200, low-voltage filter board connector assembly; 1300, three-phase magnetic Ring terminal block; 1400, third filter magnetic ring; 1500, first sealing ring; 1600, resolver connector; 1700, second sealing ring; 1800, heat dissipation water pipe; 1900, temperature sensor; 1910, main body; 1920, temperature measurement unit; 2000, IGBT; 2100, Hall; 2200, resolver fixed copper busbar; 2300, busbar cover; 2400, motor water outlet pipe; 2500, electric control upper cover; 2600, electric control water inlet pipe. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0058] According to the first aspect of this application, referring to Figure 1The present disclosure provides an electric control box, including a shell 100, a breathable valve 200 and a retaining wall 300. The shell 100 is formed with a first accommodating chamber 110, and the first accommodating chamber 110 is used to accommodate electronic devices. The breathable valve 200 is arranged on the side wall of the shell 100 to connect the first accommodating chamber 110 with the space outside the shell 100, so that the breathable valve 200 can connect the first accommodating chamber 110 with the space outside the shell 100. When the air pressure in the first accommodating chamber 110 increases, the breathable valve 200 can discharge part of the gas from the first accommodating chamber 110; when the air pressure in the first accommodating chamber 110 decreases, the outside gas is replenished into the first accommodating chamber 110 (but impurities such as water, oil and solid dust are blocked) to balance the air pressure in the first accommodating chamber 110 and the outside atmospheric pressure, so as to avoid the air pressure difference being too large to cause the sealing of the shell 100 to fail.

[0059] Refer again Figure 2 A retaining wall 300 is disposed within the first accommodating chamber 110. The retaining wall 300 is positioned between the vent valve 200 and the electronic device. As will be readily understood, the retaining wall 300 may be partially or entirely positioned between the vent valve 200 and the electronic device. This allows the retaining wall 300 to block at least a portion of the vent valve 200. In other words, the retaining wall 300 can partially block the vent valve 200, preventing shock waves or combustion products from directly impacting the vent valve. Alternatively, the retaining wall 300 can completely block the vent valve 200, preventing shock waves or combustion products from directly impacting the vent valve 200.

[0060] In the electronic control box of the embodiment of the present application, a retaining wall is provided within the first accommodating cavity formed by the housing. Thus, when the electronic components within the housing experience thermal runaway and begin to explode, the shock wave or burning materials are blocked by the retaining wall and cannot directly impact the vent valve. As can be seen from the above, the retaining wall makes it difficult for the vent valve to be pushed away from the housing by shock waves and burning materials. When thermal runaway occurs within the housing, the burning materials are confined within the housing and will not ignite flammable materials outside the electronic control box, thereby improving the safety of the electronic control box.

[0061] In some embodiments, the projection of the retaining wall 300 on the housing 100 along the axis of the breathable valve 200 can at least partially cover the breathable valve 200. It can be seen that the retaining wall 300 can provide shielding for the breathable valve 200 along the axis of the breathable valve 200. In some examples, the projection of the retaining wall 300 on the housing 100 along the axis of the breathable valve 200 can cover the breathable valve 200. Figure 3The housing 100 may contain electronic components including busbar capacitors 500 and IGBTs 2000 (Insulated Gate Bipolar Transistors). These components may explode in the event of thermal runaway. Since the retaining wall 300 shields the vent valve 200 in its axial direction, when these components explode, the retaining wall 300 can block shock waves or debris that propagate along the axial direction of the vent valve 200 and directly impact the vent valve 200, preventing the vent valve 200 from being ruptured by the shock waves or debris, or even falling off the housing 100. Figure 4 Because the vent valve 200 is mounted on the housing 100, if shock waves and debris attempt to strike the vent valve 200 radially, they often need to be reflected by walls such as the housing 100 or the electrical control cover 2500 before bypassing the retaining wall 300 and striking the vent valve 200. During this reflection process, the kinetic energy of the shock waves and debris is rapidly dissipated due to collision, and the temperature of the burning material decreases due to contact with other objects. Therefore, the destructive power of these shock waves and debris is greatly weakened when they contact the vent valve 200, making it difficult for them to break through the vent valve 200 or become detached from the housing. As can be seen from the above, the retaining wall 300 makes it easier for the vent valve 200 to maintain full functionality in the event of thermal runaway within the electrical control housing. This confines the flames or burning debris within the housing 100, preventing them from igniting flammable materials such as pipes, wiring, or soundproofing installed outside the electrical control housing. This prevents uncontrolled fires outside the electrical control housing and improves the safety of the electrical control housing.

[0062] In some embodiments, reference Figure 5 and Figure 6 , the retaining wall 300 is integrally formed with the shell 100. The shell 100 is often a casting, and the structure of the retaining wall 300 can be designed into the mold when the shell 100 is molded, which can save the cost of separately molded for the retaining wall 300. The integral molding of the retaining wall 300 and the shell 100 can also improve the strength of the retaining wall 300 and improve the protective effect of the retaining wall 300. Of course, in other embodiments, the retaining wall 300 can also be set separately from the shell 100, or even not fixed on the shell 100. For example, it can be fixed to the three-phase magnetic ring terminal block 1300 to indirectly fix the position relationship with the air valve 200, providing stable axial shielding for the air valve 200. When the retaining wall 300 is not integrally formed with the shell 100, it can also be made of a material that is inconsistent with the shell 100, such as a high-strength flame-retardant material.

[0063] In some embodiments, the retaining wall 300 is provided with a vent 410, which is staggered with the vent valve 200. By staggering the vent 410 with the vent valve 200, the retaining wall 300 can block most shock waves and debris radially approaching the vent valve 200, further improving the protection of the vent valve 200 and thus the safety of the electrical control cabinet.

[0064] In some embodiments, reference Figure 5 and Figure 6 The retaining wall 300 includes a shielding portion 301 and a connecting portion 302. The shielding portion 301 is disposed opposite the vent valve 200, i.e., shielding the vent valve 200 in the axial direction thereof, while the connecting portion 302 is used to connect the shielding portion 301 to the housing 100, i.e., to provide support for the shielding portion 301. The end of the vent valve 200 facing the first accommodating chamber 110 is connected to the vent cavity 400. The shielding portion 301 is provided with a vent opening 410 in the radial direction of the vent valve 200. Since the vent opening 410 connects the first accommodating chamber 110 and the vent cavity 400, the vent valve 200 can be connected to the first accommodating chamber 110 through the vent cavity 400, thereby maintaining the vent valve 200's function of balancing the air pressure within the first accommodating chamber 110. The vent 410 is located radially of the vent valve 200. Therefore, shock waves and debris must approach the vent valve 200 radially in order to reach it through the vent 410. However, as mentioned above, shock waves and debris approaching the vent valve 200 radially from the vent 410 have less energy and are less destructive, making them less likely to damage the vent valve 200. Furthermore, the presence of the vent 410 allows the vent valve 200 to maintain its pressure balance. Therefore, the retaining wall 300 can be completely sealed to the housing 100 outside of the vent valve 200. This means that any radial locations of the vent valve 200 not facing the vent 410 are blocked by the retaining wall 300. This further blocks most shock waves and debris approaching the vent valve 200 radially from the vent valve 200, further protecting the vent valve 200 and, consequently, enhancing the safety of the electrical control cabinet.

[0065] In some embodiments, reference Figure 3 The electric control box further includes a bus capacitor 500, which is installed in the first accommodating cavity 110. Figure 11The busbar capacitor 500 includes a capacitor housing 510, a smoothing capacitor 520, and a first filter magnetic ring 530. Both the smoothing capacitor 520 and the first filter magnetic ring 530 are disposed within a second accommodating cavity formed by the capacitor housing 510. In practice, the second accommodating cavity often only accommodates the smoothing capacitor 520. Therefore, the first filter magnetic ring 530 must be disposed outside the capacitor housing 510, requiring an additional fixing structure. The presence of this fixing structure increases the manufacturing cost of the electric control housing and increases the volume of the electric control housing. However, by arranging the first filter magnetic ring 530 within the capacitor housing 510, the capacitor housing 510 assumes the role of fixing the first filter magnetic ring 530, eliminating the need for an additional fixing structure and reducing the production cost of the electric control housing. Furthermore, the reduction in fixing structures also makes the structure of the electric control housing more compact.

[0066] In some embodiments, reference Figure 11 The busbar capacitor 500 further includes a second filter magnetic ring 540, which is installed in the second accommodating cavity. The first filter magnetic ring 530 includes a nanocrystalline magnetic ring, and the second filter magnetic ring 540 includes a ferrite magnetic ring. The first filter magnetic ring 530 and the second filter magnetic ring 540 are both arranged on the capacitor positive input copper bar 5101 and the capacitor negative input copper bar 5102. Figure 12 , capacitor positive electrode input copper bar 5101 and capacitor negative electrode input copper bar 5102 are actually electrically connected with DC bus, and DC bus is electrically connected with external power supply, and external power supply is often DC power supply such as battery.But DC power supply also has certain current fluctuation under the influence of external interference, and internal environment changes, and can not be maintained at a constant value completely.Considering that direct current needs to be converted into the inversion process of alternating current in electric control box, more stable direct current is needed, supply to IGBT2000 (in other embodiments of the present application, power device can also replace IGBT2000 with SiC) that is electrically connected with busbar capacitor 500 output end, to complete inversion process smoothly.Therefore the first filtering magnetic ring 530 and the second filtering magnetic ring 540 are set to be arranged on the input end of smoothing capacitor 520, the current fluctuation loaded on the direct current of DC bus input is filtered out. Nanocrystalline magnetic rings have a good filtering effect on low frequency bands, while ferrite magnetic rings have a good filtering effect on high frequency bands. Therefore, their combined use can achieve good filtering effects in both high and low frequency bands, thereby improving the EMC (Electromagnetic Compatibility) level of the electric control box.

[0067] In some embodiments, reference Figure 11 and Figure 13, the bus capacitor 500 also includes a first XY capacitor group 550 and a second XY capacitor group 560. The first XY capacitor group 550 includes a first X capacitor 551, a first Y capacitor 552, and a second Y capacitor 553. The second XY capacitor group 560 includes a second X capacitor 561, a third Y capacitor 562, and a fourth Y capacitor 563. The first Y capacitor 552 and the second Y capacitor 553 form a common Y capacitor pair, and the third Y capacitor 562 and the fourth Y capacitor 563 also form a common Y capacitor pair, so as to respectively play the role of suppressing common-mode interference. For the way in which the first Y capacitor 552, the second Y capacitor 553, the third Y capacitor 562, and the fourth Y capacitor 563 are connected to the circuit, refer to Figure 13 The first X capacitor 551 and the second X capacitor 561 each function to suppress differential-mode interference. The first XY capacitor group 550 and the second XY capacitor group 560 are connected in parallel. The first filter magnetic ring 530 is disposed at the input ends of the first XY capacitor group 550 and the second XY capacitor group 560, and the second filter magnetic ring 540 is disposed between the first XY capacitor group 550 and the second XY capacitor group 560. In this way, the input current of the busbar capacitor 500 is first filtered by the first filter magnetic ring 530, then filtered by the first XY capacitor group 550 for the first time to eliminate differential-mode interference and common-mode interference, then filtered by the second filter magnetic ring 540 for the second time, and finally filtered by the second XY capacitor group 560 for the second time to eliminate differential-mode interference and common-mode interference before being input into the smoothing capacitor 520. This makes the current received by the smoothing capacitor 520 more stable, improving the EMC level of the electrical control cabinet. Furthermore, the first X capacitor 551 and the second X capacitor 561 can be selected from different types, and the first Y capacitor 552 and the second Y capacitor 553 can also be selected from different types than the third Y capacitor 562 and the fourth Y capacitor 563. This allows filtering of common-mode interference and differential-mode interference in different bands, further improving the EMC level of the electrical control cabinet. The first XY capacitor group 550 and the second XY capacitor group 560 are installed in the second housing cavity, eliminating the need for additional fixing structures for the first XY capacitor group 550 and the second XY capacitor group 560, reducing the production cost of the electrical control cabinet. This also reduces the connection distance between the first XY capacitor group 550, the second XY capacitor group 560, and the smoothing capacitor 520, thereby lowering the ESR (equivalent series resistance) of the circuit and reducing the heat generation efficiency of the connection circuit during overcurrent. This also makes the electrical control cabinet more compact.

[0068] In some embodiments, reference Figure 14 as well as Figure 15 The electric control box is used to be electrically connected to the motor, which receives the AC power from the electric control box. The motor is connected to the gearbox in its axial drive, such as Figure 14 As shown, the gearbox can be a single-speed gearbox for the motor, Figure 14 as well as Figure 15 In the embodiment shown, the gearbox and the motor front housing 610 of the motor can be enclosed to form a mounting cavity for the gearbox internal structure, in which the gearbox transmits the torque output by the motor to the output shaft 710 of the gearbox. Figure 15 Normally, the radial direction of the output shaft 710 is relatively empty. The housing 100 is used to be installed on one side of the radial direction of the motor, and the housing 100 protrudes in the direction close to the output shaft 710 of the gearbox to form a capacitor accommodating portion 111 in the first accommodating cavity 110, and the busbar capacitor 500 is installed in the capacitor accommodating portion 111. In this way, the busbar capacitor 500 can be installed in the empty position in the radial direction of the output shaft 710, which rationally utilizes the space occupied by the electric assembly and makes the structure of the electric assembly more compact. Figure 15 and Figure 16 , the electric control box can even be slightly lower than the gearbox housing 720 in the Z-axis direction of the vehicle, which fully saves the installation space in the Z-axis. The electric assembly refers to the overall structure including the motor and the electric control box.

[0069] In some embodiments, reference Figure 11 、 Figure 14 and Figure 15 The side of the smoothing capacitor 520 facing the output shaft 710 is arranged parallel to the bottom wall of the housing 100. The smoothing capacitor 520 also serves as a filter and is therefore prone to heat generation. The heat of the smoothing capacitor 520 is usually directly transferred to the outside world through the capacitor housing 510 and the housing 100 to prevent the smoothing capacitor 520 from overheating. Therefore, the smoothing capacitor 520 is arranged parallel to the bottom wall of the housing 100 to ensure that the distance from the housing 100 to each location on the smoothing capacitor 520 is consistent, preventing certain locations on the smoothing capacitor 520 from being too far from the housing 100, resulting in slow heat conduction and damage to the smoothing capacitor 520. Therefore, these embodiments can improve the operational reliability of the smoothing capacitor 520.

[0070] In some embodiments, reference Figure 8 、 Figure 9 and Figure 11 The electric control box also includes a drive control integrated board 800, a first connector 910, and a second connector 920. The drive control integrated board 800 can control the IGBT2000 and monitor the working status of other components in the electric control box, as well as transmit information. Therefore, the drive control integrated board 800 needs to obtain the input terminal status of the bus capacitor 500. Figure 8In the embodiment shown, the drive control integrated board 800 is arranged on the side of the bus capacitor 500 facing away from the shell 100. The bus capacitor 500 also includes a high-voltage sampling positive copper bus 571 and a high-voltage sampling negative copper bus 572. The high-voltage sampling positive copper bus 571 is electrically connected to the positive electrode of the smoothing capacitor 520, and the high-voltage sampling negative copper bus 572 is electrically connected to the negative electrode of the smoothing capacitor 520. In this way, when the drive control integrated board 800 is electrically connected to the high-voltage sampling positive copper bus 571 and the high-voltage sampling negative copper bus 572 respectively, the input voltage and current of the bus capacitor 500 can be obtained. For this purpose, refer to Figure 9 In the embodiment shown, the first connecting member 910 is simultaneously passed through the drive control integrated board 800 and the high-voltage sampling positive copper bus 571 to be connected to the capacitor box 510, and the second connecting member 920 is simultaneously passed through the drive control integrated board 800 and the high-voltage sampling negative copper bus 572 to be connected to the capacitor box 510. In this way, the drive control integrated board 800 is electrically connected to the high-voltage sampling positive copper bus 571 and the high-voltage sampling negative copper bus 572. In addition, since the first connecting member 910 and the second connecting member 920 respectively fix the drive control integrated board 800 to the capacitor box 510, they also play a role in fixing the drive control integrated board 800. This allows the sampling and fixation of the drive control integrated board 800 to be completed by one structure at the same time, reducing the setting of other fixing structures or electrical connection structures, and making the structure of the electric control box more compact.

[0071] The first connecting member 910 may be a bolt, and the second connecting member 920 may be a bolt.

[0072] In some embodiments, reference Figure 11 The busbar capacitor 500 further includes a positive busbar 581 and a negative busbar 582. The positive busbar 581 is electrically connected to the positive electrode of the smoothing capacitor 520, and the negative busbar 582 is electrically connected to the negative electrode of the smoothing capacitor 520. The positive busbar 581 and the negative busbar 582 are disposed on opposite sides of the smoothing capacitor 520. Since the current flowing through the positive bus copper bar 581 is the positive current of the input smoothing capacitor 520, and the current flowing through the negative bus copper bar 582 is the negative current of the input smoothing capacitor 520, the currents on the positive bus copper bar 581 and the negative bus copper bar 582 are always equal in magnitude and opposite in direction. In this way, when the two currents fluctuate, the magnitude of the fluctuations is always equal in magnitude and opposite in direction. At the same time, the positive bus copper bar 581 and the negative bus copper bar 582 are arranged relative to each other, so that when any one of the above two currents fluctuates, the magnetic field generated will suppress the current fluctuation of the other current, so that the two currents tend to be stable, which is equivalent to playing a filtering role, and further improving the EMC level of the electric control box.

[0073] In some embodiments, reference Figure 14 and Figure 16, the electrical control box also includes a DC bus. The DC bus includes a wire 1010 and a connector 1020. The wire 1010 passes through the connector 1020 and is electrically connected to the bus capacitor 500. The internal structure of the connector 1020 can be hollow, allowing the wire 1010 to pass directly through without changing the structure of the wire 1010. The inside of the connector 1020 can also be divided into two channels, for the positive wire and the negative wire in the wire 1010 to pass through respectively, so that the connector 1020 is equivalent to acting as the outermost insulating sheath of the wire 1010. In this embodiment, the outermost insulating sheath of the wire 1010 is connected to the connector 1020, and after entering the connector 1020, the wire 1010 is divided into two strands. The connector 1020 may also be provided with a copper bar inside. After the wire 1010 is connected to the connector 1020, it is no longer extended to the inside of the connector 1020 by directly connecting to the copper bar, and subsequent electrical connection (i.e., allowing the electrical connection of the wire 1010 to the bus capacitor 500) is completed by the copper bar. Other embodiments of the connector 1020 can refer to the prior art. In some embodiments provided by the present application, the connector 1020 is connected to the housing 100, so that one end of the wire 1010 is also equivalent to being fixed in position with the housing 100. In addition, the direction in which the wire 1010 enters the connector 1020, i.e., the incoming line direction, is angled with the direction in which the wire 1010 leaves the connector 1020 (or provides the direction in which the subsequent electrical connection structure connected to the bus capacitor 500 is left by the connector 1020 for the wire 1010), i.e., the outgoing line direction of the connector 1020. This is equivalent to the connector 1020 providing a stable angle for the wire 1010. This is necessary because the environment around the electric control box is often very cramped, so the wires 1010 are often arranged around the electric assembly; and the connector 1020 is often a necessary connector to maintain the position of the wires 1010 and the housing 100. If the input and output directions of the connector 1020 are parallel, the wires 1010 will need to bend a distance away from the housing 100, making the turning radius of the wires 1010 from the housing 100 larger and not conducive to the surrounding layout of the wires 1010. However, because the input and output directions of the connector 1020 are at an angle, it is equivalent to helping the wires 1010 to be arranged around, reducing the turning radius of the wires 1010 and making the electric assembly structure more compact.

[0074] In some embodiments, reference Figure 16 The electric control box is installed on the vehicle. The incoming line of the connector 1020 is along the width direction of the vehicle (i.e., the Y-axis direction in the figure), and the outgoing line of the connector 1020 is along the length direction of the vehicle (i.e., the X-axis direction in the figure). On the one hand, this is equivalent to the angle between the incoming line and the outgoing line being approximately 90 degrees, so that the incoming line direction is almost parallel to the surface of the electric assembly, which is more conducive to the surrounding layout of the wire 1010. On the other hand, Figure 16The vehicle's X, Y, and Z axes are indicated in the figure. As can be seen, when the electric assembly is placed at the rear of the vehicle, such as near the rear axle or next to the rear wheels, the height of the wire 1010 protruding from the electric assembly in the vehicle's X-axis direction is small. When the vehicle is rear-ended and the rear end collapses, the wire 1010 is less likely to be crushed and broken by other structures in the vehicle. This also makes the wire 1010 less likely to leak electricity in a collision, thereby improving vehicle safety. Furthermore, if the electric assembly is placed at the front of the vehicle, such as near the front axle or near the front wheels, the wire 1010 can be prevented from being crushed and broken by other structures, causing leakage, when the front of the vehicle crashes and collapses. As can be seen from the above, this can improve vehicle safety.

[0075] In some embodiments, reference Figure 3 The electric control box also includes a shielding cover 1100 and a low-voltage filter board connector assembly 1200, wherein the low-voltage filter board connector assembly 1200 is a device that connects the drive control integrated board 800 with other external controller signals, such as the signal connection with the electric drive control system, the external 12V power supply control system or the collision signal grounding system and other control systems. Since the low-voltage filter board connector assembly 1200 plays the role of signal connection, it is more sensitive to electromagnetic interference. The low-voltage filter board connector assembly 1200 is installed in the first accommodating cavity 110, and the shielding cover 1100 is provided on the low-voltage filter board connector assembly 1200, so that the shielding cover 1100, the low-voltage filter board connector assembly 1200 and the shell 100 can be enclosed to form a shielding compartment. Among the three, the shielding cover 1100 and the shell 100 are often made of conductive materials, which can play a good electromagnetic shielding role, ensure the stability of the signal connection, and improve the EMC level of the vehicle.

[0076] In some embodiments, reference Figure 3 and Figure 17 The electric control box also includes a three-phase magnetic ring terminal block 1300. The three-phase magnetic ring terminal block outputs the three-phase alternating current generated by the IGBT2000 to supply components that drive the motor. The three-phase magnetic ring terminal block 1300 is arranged through the housing 100, so that the input end of the three-phase magnetic ring terminal block can be electrically connected to the IGBT2000, and the output end can be electrically connected to the motor. The electric control box also includes a third filter magnetic ring 1400. The third filter magnetic ring 1400 is arranged around the output end of the three-phase magnetic ring terminal block 1300, so that the alternating current output by the electric control box can be filtered at the last level, thereby improving the EMC level of the electric control box. The third filter magnetic ring 1400 can also be configured as a nanocrystalline magnetic ring.

[0077] In some embodiments, reference Figure 3 、 Figure 8 、 Figure 10 and Figure 17The electrical control box also includes a first sealing ring 1500, which is provided at the interface between the three-phase magnetic ring terminal block 1300 and the housing 100. Since the motor generates a large amount of heat during operation, this heats the air surrounding the motor. Since the saturated water vapor pressure of hot air is relatively high, if this hot air enters the housing 100 through the gap between the three-phase magnetic ring terminal block 1300 and the housing 100, the relatively low temperature inside the housing 100 may cause water droplets to condense inside the housing 100, causing malfunctions in the electronic components within the housing 100. Therefore, the provision of the first sealing ring 1500 improves the reliability of the electrical control box.

[0078] In some embodiments, reference Figure 10 and Figure 17 The electric control box also includes a resolver connector 1600 and a second sealing ring 1700, wherein the resolver connector 1600 is a signal connector that transmits the motor's speed information to the drive control integrated board 800. The resolver connector 1600 is inserted into the three-phase magnetic ring terminal block 1300, so that one end can be connected to the speed sensor signal in the motor, and the other end can be connected to the drive control integrated board 800 signal. The second sealing ring 1700 is set at the mating point of the resolver connector 1600 and the three-phase magnetic ring terminal block 1300. This can also prevent the hot air generated during the operation of the motor from entering the housing 100 through the mating gap between the three-phase magnetic ring terminal block 1300 and the resolver connector 1600, avoid the generation of droplets in the housing 100, and improve the operational reliability of the electric control box.

[0079] In some embodiments, reference Figure 5 and Figure 7 The electric control box also includes a heat dissipation water pipe 1800 and a temperature sensor 1900. The heat dissipation water pipe 1800 is installed in the housing 100. The cooling liquid flows in the heat dissipation water pipe 1800, and the cooling liquid can be used to cool the IGBT2000 in the electric control box. In particular, Figure 3 In the embodiment shown, the heat dissipation water pipe 1800 is also connected to the electric control water inlet pipe 2600 and the motor water outlet pipe 2400. Figure 3 In the illustrated embodiment, the coolant in the heat dissipation water pipe 1800 can also be used to cool the motor. However, in some other embodiments, the coolant can also be used solely to cool the IGBT 2000 or further to cool heat-generating components such as the bus capacitor 500. In order to detect the temperature of the coolant in the heat dissipation water pipe 1800 to prevent overheating of the electrical control box (or components such as the motor), a temperature sensor 1900 is provided. The temperature sensor 1900 includes a main body 1910 and a temperature measuring portion 1920. The main body 1910 of the temperature sensor 1900 is inserted into the heat dissipation water pipe 1800 so that the temperature measuring portion 1920 enters the heat dissipation water pipe 1800. In this way, the temperature measuring portion 1920 directly measures the temperature of the liquid in the heat dissipation water pipe 1800, which is more accurate.

[0080] Figure 3 In the embodiment shown, a Hall 2100 is provided. The Hall 2100 is provided at the input end of the three-phase magnetic ring terminal block 1300 and can monitor the waveform of the three-phase alternating current output by the IGBT 2000 . Figure 3 In the illustrated embodiment, a resolver fixing copper bus 2200 is further provided, which is used to fix the resolver connector 1600 to the housing 100 . Figure 3 The busbar cover 2300 shown as shown can expose the input port of the busbar capacitor 500 when it is opened (for example, Figure 12 The capacitor positive input copper bus 5101 and the capacitor negative input copper bus 5102 are shown to facilitate the electrical connection between the busbar and the busbar capacitor 500.

[0081] Figure 11 In the illustrated embodiment, a schematic diagram of a potting surface 590 is shown. This is because in this embodiment, the capacitor box 510 is not provided with an upper cover, and the components in the capacitor box 510 are packaged by potting with glue. Figure 11 The capacitor positive output copper bus 5111 and the capacitor negative output copper bus 5112 shown are copper buses that electrically connect the bus capacitor 500 and the IGBT 2000. The DC power from the bus is filtered by the bus capacitor 500 and then input into the IGBT 2000 through the capacitor positive output copper bus 5111 and the capacitor negative output copper bus 5112 to generate AC power. Figure 11 The purpose of the glue sealing baffle 5120 is to prevent the capacitor positive input copper bus 5101 and the capacitor negative input copper bus 5102 from being submerged in the glue during the glue pouring process, but to expose them to the outside and be connected to the busbar.

[0082] refer to Figure 13 ,exist Figure 13 In the embodiment shown, the first Y capacitor 552 and the second Y capacitor 553 need to be grounded, which can be achieved by Figure 11 The first grounding copper bus 5131 is shown to be grounded, and Figure 13 The third Y capacitor 562 and the fourth Y capacitor 563 shown in FIG can be used. Figure 11 The second grounding copper bus 5132 shown in FIG is grounded.

[0083] Figure 11 Also shown is an insulating voltage-resistant partition 5140, which serves to isolate the capacitor positive electrode output copper bus 5111 and the capacitor negative electrode output copper bus 5112 to prevent arcing due to the huge voltage difference between the two.

[0084] According to a second aspect of the present disclosure, an electric assembly is provided, which includes the above-mentioned electric control box. The electric assembly has all the beneficial effects of the above-mentioned electric control box, which will not be described in detail in this disclosure.

[0085] According to a third aspect of the present disclosure, an electronic device is provided, which includes the above-mentioned electric control box or the above-mentioned electric assembly. The electronic device has all the beneficial effects of the above-mentioned electric control box, which will not be described in detail in the present disclosure.

[0086] According to a fourth aspect of the present disclosure, a vehicle is provided, which includes the above-mentioned electric control box or the above-mentioned electric assembly or the above-mentioned electronic device. The vehicle has all the beneficial effects of the above-mentioned electric control box, which will not be repeated in this disclosure.

[0087] The vehicle may be a fuel vehicle, a plug-in hybrid vehicle, a new energy vehicle, etc., and this disclosure does not make any specific limitations on this.

[0088] To facilitate understanding of the present disclosure, the functions and effects of other components in the accompanying drawings are now described. In other embodiments of the present application, the components described below may not be included or may be replaced by other structures. Therefore, the following description does not limit the scope of protection of this application.

[0089] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0090] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0091] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0092] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application shall still fall within the scope of the technical solution of the present application.

Claims

1. An electric control box, characterized in that: include: The housing is formed with a first accommodating cavity, wherein the first accommodating cavity is used to accommodate the electronic device; a vent valve, disposed on a side wall of the housing to connect the first accommodating cavity with the space outside the housing; and The retaining wall is arranged in the first accommodating cavity and is used to be arranged between the breathable valve and the electronic component.

2. The electric control box according to claim 1, characterized in that: The retaining wall and the shell are integrally formed.

3. The electric control box according to claim 1, characterized in that: The retaining wall is provided with an air vent, and the air vent and the air valve are staggered.

4. The electric control box according to any one of claims 1 to 3, characterized in that: The electric control box further includes a bus capacitor, which is installed in the first accommodating cavity and includes: The capacitor box is formed with a second accommodating cavity; a smoothing capacitor, installed in the second accommodating cavity; The first filter magnetic ring is installed in the second accommodating cavity.

5. The electric control box according to claim 4, characterized in that: The busbar capacitor further includes a second filter magnetic ring, which is installed in the second accommodating cavity; the first filter magnetic ring includes a nanocrystalline magnetic ring, and the second filter magnetic ring includes a ferrite magnetic ring.

6. The electric control box according to claim 5, characterized in that: The bus capacitor also includes a first XY capacitor group and a second XY capacitor group; the first XY capacitor group and the second XY capacitor group are connected in parallel; the first filter magnetic ring is arranged at the input end of the first XY capacitor group and the second XY capacitor group; the second filter magnetic ring is arranged between the first XY capacitor group and the second XY capacitor group; the first XY capacitor group and the second XY capacitor group are installed in the second accommodating cavity.

7. The electric control box according to claim 4, characterized in that: The electrical control box is used to be electrically connected to the motor; wherein, the shell is used to be installed on one radial side of the motor; the shell protrudes in the direction close to the output shaft of the gearbox driven by the motor to form a capacitor accommodating portion in the first accommodating cavity, and the busbar capacitor is installed in the capacitor accommodating portion.

8. The electric control box according to claim 7, characterized in that: The side of the smoothing capacitor facing the output shaft is arranged parallel to the bottom wall of the housing.

9. The electric control box according to claim 7, characterized in that: The electric control box further includes a drive control integrated board, a first connecting member and a second connecting member; The drive control integrated board is arranged on the side of the bus capacitor facing away from the housing; the bus capacitor further comprises a high-voltage sampling positive copper busbar and a high-voltage sampling negative copper busbar; the high-voltage sampling positive copper busbar is electrically connected to the positive electrode of the smoothing capacitor, and the high-voltage sampling negative copper busbar is electrically connected to the negative electrode of the smoothing capacitor; The first connecting member passes through the drive control integrated board and the high-voltage sampling positive copper busbar and is connected to the capacitor box; The second connecting member passes through the drive control integrated board and the high-voltage sampling negative copper busbar and is connected to the capacitor box.

10. The electric control box according to claim 4, characterized in that: The busbar capacitor further includes a positive busbar and a negative busbar; the positive busbar is electrically connected to the positive electrode of the smoothing capacitor; the negative busbar is electrically connected to the negative electrode of the smoothing capacitor; the positive busbar and the negative busbar are arranged on both sides of the smoothing capacitor and are arranged opposite to each other.

11. The electric control box according to claim 4, characterized in that: The electrical control box also includes a DC bus; the DC bus includes a wire and a connector, the wire passes through the connector and is electrically connected to the bus capacitor, and the connector is connected to the shell; the incoming line direction of the connector and the outgoing line direction of the connector are set at an angle.

12. The electric control box according to claim 11, characterized in that: The electric control box is used to be installed on a vehicle; the line input direction of the connector is along the width direction of the vehicle, and the line output direction of the connector is along the length direction of the vehicle.

13. The electric control box according to any one of claims 1 to 3, characterized in that: The electrical control box also includes a shielding cover and a low-voltage filter board connector assembly; the low-voltage filter board connector assembly is installed in the first accommodating cavity, and the shielding cover is arranged on the low-voltage filter board connector assembly. The shielding cover, the low-voltage filter board connector assembly and the shell are enclosed to form a shielding compartment.

14. The electric control box according to any one of claims 1 to 3, characterized in that: The electric control box further comprises a three-phase magnetic ring terminal block, the three-phase magnetic ring terminal block is provided through the housing, the electric control box further comprises a third filter magnetic ring, the third filter magnetic ring is provided at the output end of the three-phase magnetic ring terminal block; and / or The electric control box further comprises a first sealing ring, which is arranged at the matching position between the three-phase magnetic ring terminal block and the shell.

15. The electric control box according to claim 14, characterized in that: The electric control box further includes a resolver connector and a second sealing ring. The resolver connector is inserted into the three-phase magnetic ring terminal block. The second sealing ring is arranged at the matching position between the resolver connector and the three-phase magnetic ring terminal block.

16. The electric control box according to any one of claims 1 to 3, characterized in that: The projection of the retaining wall on the electric control box along the axial direction of the ventilation valve at least partially covers the ventilation valve.

17. An electric assembly, characterized in that: The electric control box comprises the electric control box according to any one of claims 1 to 16.

18. An electronic device, characterized in that: The electric control box comprises any one of claims 1 to 16 or the electric assembly comprises claim 17.

19. A vehicle, characterized in that: It includes the electric control box according to any one of claims 1 to 16, the electric assembly according to claim 17, or the electronic device according to claim 18.

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