Inverter, motor controller, motor assembly and vehicle

Abstract

The present disclosure relates to an inverter device, a motor controller, an electric assembly and a vehicle. The inverter device includes a capacitor module and a power module. The capacitor module includes a capacitor housing, and a first flow channel is arranged on the capacitor housing; the power module is installed on the capacitor module, and the power module includes a plurality of power tubes and a first conductive member, the first conductive member is electrically connected to the power tubes, the first conductive member is used to connect the winding of the motor, and the first flow channel is used for heat exchange of the first conductive member. The inverter device installs the power tubes and the first conductive member on the capacitor module, and can use the first flow channel to exchange heat for the first conductive member, such as cooling, thereby improving the cooling effect, reducing the difficulty of assembly, and improving the product integration and automatic assembly capabilities.

Description

Technical Field

[0001] The present disclosure relates to the technical field of inverters, and in particular, to an inverter device, a motor controller, a motor assembly and a vehicle. Background Art

[0002] The existing inverter device (inverter brick structure) integrates structures such as capacitor modules, power modules, three-phase output modules (including three-phase copper bars) and cooling water channels. It focuses on a certain component, sets multiple connection structures on the component, and fixes the remaining components such as capacitors and power modules to the component. The overall size is still large and the cooling effect is poor. Summary of the invention

[0003] The purpose of the present disclosure is to provide an inverter device, a motor controller, a motor assembly and a vehicle. The inverter device installs power tubes and conductive parts on a capacitor module, and can use a first flow channel to exchange heat for the conductive parts, such as cooling, thereby improving the cooling effect, reducing the difficulty of assembly, and improving product integration and automated assembly capabilities.

[0004] In order to achieve the above-mentioned object, the present disclosure provides, in a first aspect, an inverter device, comprising:

[0005] A capacitor module, the capacitor module comprising a capacitor housing, the capacitor housing being provided with a first flow channel; and

[0006] A power module, wherein the power module is mounted on the capacitor module, and the power module comprises a plurality of power tubes and a first conductive member, wherein the first conductive member is electrically connected to the power tubes, the first conductive member is used to connect the windings of the motor, and the first flow channel is used for heat exchange of the first conductive member.

[0007] Optionally, the inverter device further includes a flow channel plate, the flow channel plate is fixedly connected to the capacitor housing, a second flow channel is provided on the flow channel plate, and the second flow channel is used for heat exchange of the power tube.

[0008] Optionally, the power module further includes a base plate, the power tube is fixedly connected to the base plate, and the base plate covers the opening of the second flow channel.

[0009] Optionally, the power module also includes a heat sink having a third flow channel, the heat sink is connected to a side of the base plate away from the second flow channel, a first mounting portion for mounting a plurality of the power tubes is formed between the heat sink and the base plate, and the third flow channel is used for heat exchange of the power tubes.

[0010] Optionally, the heat sink includes a first plate body and a second plate body, and the first plate body and the second plate body surround the third flow channel.

[0011] Optionally, a heat dissipation portion located inside the third flow channel is formed on a side of the first plate body and / or the second plate body facing the third flow channel.

[0012] Optionally, a first liquid inlet and a first liquid outlet communicating with the third flow channel are formed on the second plate;

[0013] A first liquid inlet channel connecting the first liquid inlet and the second flow channel, and a first liquid outlet channel connecting the first liquid outlet and the second flow channel are formed on the bottom plate.

[0014] Optionally, a first joint and a second joint are provided on the capacitor housing; the first joint is connected to the first flow channel, the second joint is connected to the second flow channel and / or the third flow channel, and one of the first joint and the second joint is an inlet joint, and the other is an outlet joint.

[0015] Optionally, the first connector and the second connector are arranged on the same side of the capacitor housing;

[0016] The first flow channel is L-shaped and located on the side of the capacitor housing facing the flow channel plate. One end of the first flow channel is connected to the first joint, and the other end extends in a direction away from the first joint and communicates with the second flow channel.

[0017] Optionally, the capacitor module further includes a capacitor component, and the capacitor component is sealed in the capacitor housing by glue filling.

[0018] Optionally, the inverter device further includes a second conductive member, the second conductive member is electrically connected to the first conductive member, and the first flow channel is used for cooling the first conductive member and the second conductive member.

[0019] Optionally, the second conductive member is fixedly connected to the flow channel plate, and the flow channel plate at least partially wraps the second conductive member.

[0020] Optionally, the inverter device further includes a circuit board;

[0021] The flow channel plate further includes a fourth mounting portion, and the circuit board is fixedly connected to the fourth mounting portion and is located at a side of the power module away from the capacitor housing.

[0022] According to a second aspect of the present disclosure, a motor controller is further provided, wherein the motor controller comprises the above-mentioned inverter device.

[0023] According to a third aspect of the present disclosure, an electric assembly is provided, wherein the electric assembly includes the above-mentioned motor controller.

[0024] According to a fourth aspect of the present disclosure, a vehicle is also provided, comprising the above-mentioned electric assembly.

[0025] Through the above technical solution, the inverter device disclosed in the present invention includes a capacitor module and a power module, the capacitor module includes a capacitor housing with a first flow channel, the power module is installed on the capacitor module, and includes a plurality of power tubes and a first conductive member, the first conductive member is electrically connected to the power tube and is used to be electrically connected to the winding of the motor, and can achieve heat exchange for the first conductive member through the first flow channel, wherein the first conductive member can be an AC terminal of the power tube. The inverter device installs the power tube and the first conductive member on the capacitor module, and can use the first flow channel to exchange heat for the first conductive member, such as cooling, to improve the cooling effect, and can reduce the difficulty of assembly, improve product integration and automated assembly capabilities.

[0026] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure.

[0028] Figure 1 It is a structural diagram of an inverter device provided in some embodiments of the present disclosure.

[0029] Figure 2 is an exploded diagram of an inverter device provided in some embodiments of the present disclosure.

[0030] Figure 3 is an exploded diagram of a first cooling unit provided in some embodiments of the present disclosure.

[0031] Figure 4 is a structural diagram of a second cooling unit provided in some embodiments of the present disclosure.

[0032] Figure 5 is an exploded view of a second cooling unit provided in some embodiments of the present disclosure.

[0033] Figure 6 It is an exploded view of the first cooling unit, the first body and the second body provided in some embodiments of the present disclosure.

[0034] Figure 7 It is a structural diagram of the first entity provided in some embodiments of the present disclosure.

[0035] Figure 8 It is a structural diagram of the second body provided in some embodiments of the present disclosure.

[0036] Fig. 9It is a schematic diagram of the flow direction of the coolant in the inverter device provided in some embodiments of the present disclosure.

[0037] Description of Reference Numerals

[0038] 100-power module; 101-third flow channel; 102-first mounting portion; 110-heat sink; 111-first plate; 112-second plate; 1121-first liquid inlet; 1122-first liquid outlet; 120-heat dissipation portion; 130-power tube; 131-first conductive member; 140-bottom plate; 141-first liquid inlet channel; 142-first liquid outlet channel; 150-second sealing member;

[0039] 200-capacitor module; 201-second flow channel; 202-first flow channel; 203-second joint; 204-first joint; 210-flow channel plate; 211-second liquid inlet; 212-second liquid outlet; 213-fourth mounting portion; 214-third mounting portion; 220-capacitor housing; 221-second mounting portion; 2211-groove structure; 230-capacitor element; 240-second conductive element; 250-first sealing element;

[0040] 300-Circuit Board. DETAILED DESCRIPTION

[0041] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0042] In this disclosure, unless otherwise stated, the directional words used, such as "inside" and "outside", refer to the outline of the corresponding parts themselves. The terms "first", "second", etc. used in this disclosure are to distinguish one element from another element and do not have order or importance. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0043] The purpose of the present disclosure is to provide an inverter device, a motor controller, an electric assembly and a vehicle. The inverter device installs a power tube 130 and a first conductive member 131 on a capacitor module 200, and can use a first flow channel 202 to exchange heat for the first conductive member 131, such as cooling, thereby improving the cooling effect, reducing the difficulty of assembly, and improving product integration and automated assembly capabilities.

[0044] In order to achieve the above purpose, Figures 1 to 9As shown, an embodiment of the present disclosure provides an inverter device, which includes a capacitor module 200 and a power module 100, the capacitor module 200 includes a capacitor housing 220, and the capacitor housing 220 is provided with a first flow channel 202; the power module 100 is installed on the capacitor module 200, the power module 100 includes a plurality of power tubes 130 and a first conductive member 131, the first conductive member 131 is electrically connected to the power tube 130, the first conductive member 131 is used to electrically connect the winding of the motor, and the first flow channel 202 is used for heat exchange of the first conductive member 131. Among them, the first flow channel 202 can be passed through a cooling medium or a coolant to achieve heat dissipation of the first conductive member 131.

[0045] Through the above technical solution, the inverter device of the present disclosure includes a capacitor module 200 and a power module 100, the capacitor module 200 includes a capacitor housing 220 having a first flow channel 202, the power module 100 is installed on the capacitor module 200, and includes a plurality of power tubes 130 and a first conductive member 131, the first conductive member 131 is electrically connected to the power tube 130 and is used to be electrically connected to the winding of the motor, and heat exchange for the first conductive member 131 can be achieved through the first flow channel 202. The inverter device installs the power tube 130 and the first conductive member 131 on the capacitor module 200, and can use the first flow channel 202 to exchange heat for the first conductive member 131, such as cooling, thereby improving the cooling effect, reducing the difficulty of assembly, and improving the product integration and automated assembly capabilities.

[0046] In order to cool the power tube 130, in some embodiments, the inverter device further includes a flow channel plate 210, the flow channel plate 210 is fixedly connected to the capacitor housing 220, and a second flow channel 201 is provided on the flow channel plate 210, and the second flow channel 201 is used for heat exchange of the power tube 130. The flow channel plate 210 can be provided on one side of the power tube 130 and installed above the capacitor housing 220. When the cooling medium or coolant (such as water) passes through the second flow channel 201 of the flow channel plate 210, heat exchange can be performed on the power tube 130, thereby cooling the power tube 130.

[0047] It should be noted that the first flow channel 202 and / or the second flow channel 201 can also be configured to be able to perform heat exchange on the capacitor 230 of the capacitor housing 220 to achieve cooling of the capacitor 230. For example, the first flow channel 202 can be used for heat exchange between the first conductive member 131 and the capacitor 230, and the second flow channel 201 can be used for heat exchange between the power tube 130, the first conductive member 131 and the capacitor 230 at the same time.

[0048] In order to allow the coolant to flow into the second flow channel 201, the second flow channel 201 needs to be a relatively closed structure, such as Figure 3As shown, in some embodiments, the power module 100 further includes a bottom plate 140, the power tube 130 is fixedly connected to the bottom plate 140, and the bottom plate 140 covers the opening of the second flow channel 201. The power tube 130 can be fixedly connected to the bottom plate 140, and the bottom plate 140 covers the opening of the second flow channel 201 of the flow channel plate 210, so that the bottom plate 140 and the second flow channel 201 form a relatively closed cavity, and the coolant can be passed to realize cooling of the power tube 130.

[0049] It is understandable that after the flow channel plate 210 is connected to the capacitor housing 220 of the capacitor module 200 , it also forms a relatively closed cavity with the first flow channel 202 , through which coolant can flow to achieve heat exchange with the first conductive member 131 .

[0050] In order to improve the heat dissipation capacity of the second flow channel 201, in some embodiments, a heat dissipation portion may also be formed on the side of the base plate 140 facing the second flow channel 201 to increase the heat exchange area, that is, the contact area with the coolant. The specific structure of the heat dissipation portion may select a suitable fin structure, including but not limited to pin-fin, corrugated or straight-fin structures.

[0051] In some embodiments, in order to ensure the sealing effect between the bottom plate 140 and the second flow channel 201 , a first sealing member 250 (eg, a sealing ring or a sealing strip) may be provided at the junction of the bottom plate 140 and the second flow channel 201 to prevent leakage of the coolant.

[0052] In the inverter device, the power tube 130 is a device with relatively large heat generation. Therefore, in order to further realize the heat exchange of the power tube 130, as shown in FIG. Figure 2 and Figure 3 As shown, in some embodiments, the power module 100 further includes a heat sink 110 having a third flow channel 101, the heat sink 110 is connected to a side of the bottom plate 140 away from the second flow channel 201, and a first mounting portion 102 for mounting a plurality of power tubes 130 is formed between the heat sink 110 and the bottom plate 140, and the third flow channel 101 is used for heat exchange of the power tubes 130. The third flow channel 101 may also be a relatively closed cavity, for example, it may include a liquid inlet and a liquid outlet, for the circulation of a cooling medium or a coolant, and heat dissipation is achieved through the cooling medium or the coolant. A first mounting portion 102 for mounting the power tube 130 is formed between the base plate 140 and the radiator 110, that is, one side of the power tube 130 has a second flow channel 201, and the other opposite side has a third flow channel 101, so that the third flow channel 101 of the radiator 110 and the second flow channel 201 of the flow channel plate 210 can together realize heat exchange of the power tube 130, improve heat exchange efficiency, and ensure normal operation of the power tube 130.

[0053] The heat sink 110 may be constructed using any suitable structure, such as Figures 5 to 8 As shown, in some embodiments, the heat sink 110 includes a first plate body 111 and a second plate body 112, and the first plate body 111 and the second plate body 112 form a third flow channel 101. Among them, a depression can be formed on the first plate body 111 and / or the second plate body 112, and when the first plate body 111 and the second plate body 112 are connected, the depression forms the third flow channel 101. For example, a depression in the direction opposite to the second plate body 112 can be formed on the first plate body 111, and the depression and the second plate body 112 form the third flow channel, and the power tube 130 can be installed in the first installation part 102 between the second plate body 112 and the bottom plate 140. Since the second plate body 112 and the bottom plate 140 are both flat plates, it is convenient to form the first installation part 102, simplifying the installation.

[0054] In order to better increase the heat dissipation area to achieve cooling effect, such as Figure 3 As shown, in some embodiments, the first plate 111 and / or the second plate 112 is formed with a heat dissipation portion 120 located inside the third flow channel on the side facing the third flow channel 101. The heat dissipation portion 120 can be arranged on the first plate 111 or the second plate 112, and of course, can also be arranged on both the first plate 111 and the second plate 112. In order to increase the heat exchange area, the heat dissipation portion 120 can select a suitable fin structure, including but not limited to a pin-fin, corrugated or straight-fin structure.

[0055] It should be noted that the power tube 130 can be a single tube, half-bridge or full-bridge power device.

[0056] It should be noted that the first flow channel 202 , the second flow channel 201 and the third flow channel 101 may be cavity structures for the coolant to flow in separately, or may be a closed structure for the coolant to flow in and out by a second joint 203 and a first joint 204 .

[0057] In order to achieve the communication between the third flow channel 101 and the second flow channel 201, as Figure 5 and Figure 6As shown, in some embodiments, the second plate body 112 is formed with a first liquid inlet 1121 and a first liquid outlet 1122 connected to the third flow channel 101; the bottom plate 140 is formed with a first liquid inlet channel 141 connecting the first liquid inlet 1121 and the second flow channel, and a first liquid outlet channel 142 connecting the first liquid outlet 1122 and the second flow channel. Among them, the second joint 203 is connected with the second liquid inlet 211 of the second flow channel 201, the second flow channel 201 is connected with the third flow channel 101 through the first liquid inlet channel 141 and the first liquid inlet 1121, the third flow channel 101 is connected with the second flow channel 201 through the first liquid outlet 1122 and the first liquid outlet channel 142, and the outlet of the third flow channel 101 can be connected with the first joint 204 through the first flow channel 202, so as to realize the circulation of the coolant.

[0058] In some embodiments, in order to ensure the sealing performance between the first liquid inlet 1121 and the first liquid inlet channel 141, and between the first liquid outlet 1122 and the first liquid outlet channel 142, a second sealing member 150, such as a sealing ring, may be provided between the two to ensure the sealing effect and prevent leakage of the coolant.

[0059] In some embodiments, a first joint 204 and a second joint 203 are provided on the capacitor housing 220; the first joint 204 is connected to the first flow channel 202, and the second joint 203 is connected to the second flow channel 201 and / or the third flow channel 101, and one of the first joint 204 and the second joint 203 is an inlet joint, and the other is an outlet joint.

[0060] For example, a first joint 204 and a second joint 203 are provided on the capacitor housing 220, wherein the first joint 204 and the second joint 203 can be connected to the first flow channel 202, the second flow channel 201 and the third flow channel 101 respectively, or the three can be connected by arranging appropriate connecting channels to realize the circulation and heat exchange of the coolant.

[0061] In some embodiments, the first joint 204 and the second joint 203 are arranged on the same side of the capacitor housing 220; and the first flow channel 202 is constructed in an L-shape and is located on the side of the capacitor housing 220 facing the flow channel plate 210, one end of the first flow channel 202 is connected to the first joint 204, and the other end extends in a direction away from the first joint 204 and communicates with the second flow channel 201. Among them, the second joint 203 is communicated with the second liquid inlet 211 of the second flow channel 201, the second flow channel 201 is communicated with the third flow channel 101 through the first liquid inlet channel 141 and the first liquid inlet 1121, the third flow channel 101 is communicated with the second flow channel 201 through the first liquid outlet 1122 and the first liquid outlet channel 142, and the outlet of the third flow channel 101 can be communicated with the first joint 204 through the first flow channel 202, thereby realizing the circulation of the coolant.

[0062] Optionally, the inverter device further includes a second conductive member 240, which is electrically connected to the first conductive member 131, and the first flow channel 202 is used to cool the first conductive member 131 and the second conductive member 240. When the cooling medium is passed into the first flow channel 202, the first conductive member 131 and the second conductive member 240 can be cooled simultaneously. The second conductive member 240 is fixedly connected to the flow channel plate 210, and the flow channel plate 210 at least partially wraps the second conductive member 240.

[0063] In some embodiments, the flow channel plate 210 is provided with a third mounting portion 214, and the second conductive member 240 is fixedly mounted on the third mounting portion 214. The second conductive member 240 can be fixedly mounted on the flow channel plate 210 in any suitable manner, for example, the second conductive member 240 and the flow channel plate 210 can be injection molded. For example, the second conductive member 240 can be a three-phase copper busbar. In order to simplify manufacturing, the third mounting portion 214 can be arranged on the side of the second flow channel 201, and the three-phase copper busbar can be injection molded with the flow channel plate 210. In addition, in order to facilitate current monitoring, a current sampling chip can be arranged on the second conductive member 240 (three-phase copper busbar), wherein the current sampling chip can also be injection molded together with the three-phase copper busbar.

[0064] It should be noted that the first flow channel 202 can adopt any suitable shape, such as Figure 6 As shown, in some embodiments, the first flow channel 202 can be configured as an L-shape, one end of the first flow channel 202 is connected to the second liquid outlet 212 of the second flow channel 201, and the other end is connected to the first joint 204, wherein at least a portion of the first flow channel 202 is located below the third mounting portion 214 of the flow channel plate 210, so that the first flow channel 202 can perform heat exchange with the second conductive member 240 mounted on the third mounting portion 214. It can be understood that the above configuration of the first flow channel as an L-shape is schematic, and can also be configured as an approximate L-shape or other shapes.

[0065] The first flow channel 202 is respectively connected to the second flow channel 201 and the third flow channel 101, and the specific connection relationship is that the second joint 203 is connected to the second liquid inlet 211 of the second flow channel 201, the second flow channel 201 is connected to the third flow channel through the first liquid inlet channel 141 and the first liquid inlet 1121, the third flow channel 101 is connected to the second flow channel 201 through the first liquid outlet 1122 and the first liquid outlet channel 142, the second liquid outlet 212 of the second flow channel 201 is connected to the inlet of the first flow channel 202, and the outlet of the first flow channel 202 is connected to the first joint 204, so as to realize the circulation of the coolant. Therefore, the second flow channel 201 and the third flow channel 101 are equivalent to being arranged in parallel, and then connected in series with the first flow channel 202. A portion of the coolant entering the second flow channel 201 through the second joint 203 can enter the first flow channel 202 through the second liquid outlet 212 of the second flow channel 201, and another portion can enter the third flow channel 101, and then flow to the first flow channel 202 after flowing into the second flow channel 201, and finally flow out from the first joint 204. Through the above configuration, a second joint 203 and a first joint 204 can be provided to meet the circulation of the coolant in the three flow channels, and realize the cooling of the power tube 130, the first conductive component 131, the capacitor 230 and the second conductive component 240.

[0066] The capacitor 230 can be arranged on the capacitor housing 220 in any suitable manner. In order to fix the capacitor 230, for example, Figure 8 As shown, in some embodiments, the capacitor module 200 includes a capacitor 230, the capacitor housing 220 is formed with a second mounting portion 221, and the capacitor 230 is sealed to the second mounting portion 221 of the capacitor housing 220 by glue filling. The second mounting portion 221 can be configured as a groove structure 2211, and the capacitor 230 is sealed to the groove structure 2211 by glue filling to achieve fixation.

[0067] The flow channel plate 210 may be fixedly connected to the capacitor housing 220 in any suitable manner. For example, in some embodiments, the flow channel plate 210 and the capacitor housing 220 are fixedly connected by insert molding.

[0068] It should be noted that the flow channel plate 210 and the capacitor housing 220 can be fixedly installed by sealing with a sealing ring, fastener connection, etc. Solvent connection, insert molding, etc. can also be selected for connection, as long as the sealing performance is ensured. Taking insert molding as an example, the convex part on the top of the capacitor housing 220 is inserted into the corresponding groove part at the bottom of the flow channel plate 210, and the sealing connection can be achieved by melting.

[0069] like Figure 1 and Figure 2As shown, in some embodiments, the inverter device further includes a circuit board 300; the flow channel plate 210 further includes a fourth mounting portion 213, the circuit board 300 is fixedly connected to the fourth mounting portion 213, and is located on a side of the power module 100 away from the capacitor housing 220. The fourth mounting portion 213 can be disposed on a side of the flow channel plate 210 away from the capacitor housing 220, and can be constructed as a plurality of mounting columns surrounding the second flow channel 201. For example, four mounting columns can be arranged on opposite sides of the second flow channel 201, respectively, and the circuit board 300 is fixed to the mounting columns by mounting screws to achieve the installation and fixation of the circuit board 300.

[0070] An embodiment of the present disclosure provides a motor controller, which includes the inverter device of the above embodiment. Therefore, the motor controller also has all the advantages of the inverter device.

[0071] An embodiment of the present disclosure provides an electric assembly, which includes the above-mentioned motor controller. Therefore, the electric assembly also has all the advantages of the motor controller, which will not be described in detail here.

[0072] The embodiment of the present disclosure also provides a vehicle, which includes the above-mentioned electric assembly, so the vehicle also has all the advantages of the electric assembly. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle.

[0073] In addition, the inverter device of the embodiment of the present disclosure can also be used for other electrical equipment, wherein the electrical equipment can be the above-mentioned motor controller, electric assembly and vehicle, and can also be a distribution box, mobile phone, portable device, laptop computer, ship, spacecraft, electric toy and electric tool, etc. Spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc. The embodiments of the present application do not impose special restrictions on the above-mentioned electrical equipment.

[0074] The inverter device of the disclosed embodiment provides a new design scheme for packaging a circuit board 300 (e.g., a PCB board), a power module 100 (including a third flow channel 101, a power tube 130, a first conductive member 131, and a second conductive member 240), a flow channel plate 210 (including a second flow channel 201), and a capacitor module 200 (including a capacitor member 230, a capacitor housing 220 having a first flow channel 202). That is, by improving the cooling structure and the connection method between the modules, the difficulty of assembly can be effectively reduced, and the product integration and automated assembly capability can be improved.

[0075] The inventive concept of the present disclosure is mainly embodied in two aspects.

[0076] The first aspect: Figure 2 As shown, the circuit board 300, the power module 100 and the capacitor module 200 are integrated as a whole into the form of an inverter brick, which has a more compact structure and can effectively improve the space utilization of the motor controller. The radiator 110 of the power module 100 can select a common single-sided radiator, or a double-sided water-cooled radiator. In the present disclosure, a double-sided water-cooled radiator (a second flow channel 201 and a third flow channel 101) is taken as an example. The double-sided water-cooled radiator module has no lower cover plate and only includes a first plate body 111, a second plate body 112 and a bottom plate 140. The first plate body 111 and the second plate body 112 are fixedly connected by brazing or the like to form the third flow channel 101, and the bottom plate 140 and the flow channel plate 210 form the second flow channel 201. The heat dissipation portion 120 can select a suitable fin structure, including but not limited to a pin-fin, corrugated or straight-fin structure. The power tube is clamped between the second flow channel 201 and the third flow channel 101, and the power tube 130 and the base plate 140 are fixed by screws. The capacitor module 200 includes a flow channel plate 210 and a capacitor housing 220. The flow channel plate 210 includes a second flow channel 201 and a third mounting portion 214. The three-phase copper busbar and the flow channel plate 210 are integrally injection molded. Correspondingly, the current sampling chip can also be injection molded at the corresponding position of the copper busbar. The capacitor housing 220 includes a first flow channel 202, a second connector 203 connected to the second flow channel 201, and a first connector 204 connected to the first flow channel 202.

[0077] Second aspect: In the present disclosure, the second flow channel is formed by the bottom plate 140 and the depression on the flow channel plate 210, and there is no need to separately set up a cover body and a welding pipe. A sealing ring can be selected between the two to save costs. Fig. 9As shown, it enters through the second joint 203 and finally flows out through the first joint 204. In addition to dissipating heat to the power tube 130, the second flow channel 201 can also dissipate heat to the capacitor 230 at the bottom through the bottom plate 140. After the coolant flows back through the first flow channel 202, it can dissipate heat to the first conductive member 131 and the second conductive member 240 (three-phase copper busbar), thereby improving the overall heat dissipation efficiency without adding a thermal pad or thermal conductive adhesive. After the power module 100 and the capacitor module 200 are assembled together, the circuit board 300 is fixedly installed on the fourth mounting portion 213, and the inverter device is assembled. The connection between the power tube terminal, the three-phase copper busbar, and the capacitor copper busbar can be selected by screw fixing or laser welding.

[0078] Compared with related designs, in the inverter device disclosed in the present invention, the capacitor housing 220 with the first flow channel 202 is directly fixed to the power module 100 with the third flow channel 101, and the second flow channel 201 is surrounded by the flow channel plate 210 to save costs and ensure modular design.

[0079] The inverter device in the present disclosure includes a flow channel plate 210 and a capacitor housing 220. The second conductive member 240 (three-phase copper busbar) can be directly encapsulated in the flow channel plate 210, eliminating the raw materials of the three-phase injection molding parts and saving costs. In addition, the coolant can directly dissipate heat for the capacitor 230 and the three-phase copper busbar, without the need for a thermal pad or thermal conductive adhesive, and the heat dissipation efficiency is effectively improved. In the present disclosure, the second conductive member 240 (three-phase copper busbar), the capacitor 230, the power tube 130, the first conductive member 131 and the circuit board 300 (PCB board) are integrated into one, saving costs, overall packaging, and a higher degree of integration. The number of internal components of the controller is simplified, which facilitates the assembly and disassembly of the motor controller and reduces the difficulty of manufacturing and maintenance.

[0080] The inverter device disclosed in the present invention has a smaller overall package, which is convenient for disassembly and assembly, and improves assembly efficiency to a certain extent. The coolant directly dissipates heat to the capacitor 230, the power tube 130, the first conductive member 131 and the second conductive member 240 (three-phase copper busbar), without adding a heat conducting plate or heat conducting glue, and the heat dissipation efficiency is higher. The capacitor 230 and the power tube 130 share a water channel, saving costs and integrating the process.

[0081] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0082] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0083] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. An inverter device, characterized in that: include: A capacitor module, the capacitor module comprising a capacitor housing, the capacitor housing being provided with a first flow channel; as well as A power module, the power module is mounted on the capacitor module, the power module comprises a plurality of power tubes and a first conductive member, and the first conductive member is electrically connected to the power tube; The inverter device also includes a second conductive member, one end of which is electrically connected to the first conductive member, and the other end of which is used to electrically connect to the winding of the motor. The first flow channel is used to cool the first conductive member and the second conductive member.

2. The inverter device according to claim 1, characterized in that: The inverter device further includes a flow channel plate, the flow channel plate is fixedly connected to the capacitor housing, a second flow channel is provided on the flow channel plate, and the second flow channel is used for heat exchange of the power tube.

3. The inverter device according to claim 2, characterized in that: The power module further includes a bottom plate, the power tube is fixedly connected to the bottom plate, and the bottom plate covers the opening of the second flow channel.

4. The inverter device according to claim 3, characterized in that: The power module also includes a heat sink having a third flow channel, the heat sink is connected to a side of the base plate away from the second flow channel, a first mounting portion for mounting a plurality of the power tubes is formed between the heat sink and the base plate, and the third flow channel is used for heat exchange of the power tubes.

5. The inverter device according to claim 4, characterized in that: The heat sink includes a first plate body and a second plate body, and the first plate body and the second plate body surround the third flow channel.

6. The inverter device according to claim 5, characterized in that: A heat dissipation portion located inside the third flow channel is formed on a side of the first plate body and / or the second plate body facing the third flow channel.

7. The inverter device according to claim 5, characterized in that: The second plate body is formed with a first liquid inlet and a first liquid outlet which are in communication with the third flow channel; A first liquid inlet channel connecting the first liquid inlet and the second flow channel, and a first liquid outlet channel connecting the first liquid outlet and the second flow channel are formed on the bottom plate.

8. The inverter device according to claim 4, characterized in that: The capacitor housing is provided with a first joint and a second joint; the first joint is connected to the first flow channel, the second joint is connected to the second flow channel and / or the third flow channel, one of the first joint and the second joint is an inlet joint, and the other is an outlet joint.

9. The inverter device according to claim 8, characterized in that: The first connector and the second connector are arranged on the same side of the capacitor housing; The first flow channel is L-shaped and located on the side of the capacitor housing facing the flow channel plate. One end of the first flow channel is connected to the first joint, and the other end extends in a direction away from the first joint and communicates with the second flow channel.

10. The inverter device according to claim 1, characterized in that: The capacitor module further includes a capacitor component, and the capacitor component is glue-filled and sealed in the capacitor housing.

11. The inverter device according to claim 1, characterized in that: The second conductive member is fixedly connected to the flow channel plate, and the flow channel plate at least partially wraps the second conductive member.

12. The inverter device according to claim 2, characterized in that: The inverter device also includes a circuit board; The flow channel plate further includes a fourth mounting portion, and the circuit board is fixedly connected to the fourth mounting portion and is located at a side of the power module away from the capacitor housing.

13. A motor controller, characterized in that: The motor controller comprises the inverter device according to any one of claims 1-12.

14. An electric assembly, characterized in that: The electric powertrain includes the motor controller of claim 13 .

15. A vehicle, characterized in that: The vehicle includes the electric powertrain of claim 14.

Images