Motor cooling system for electronic supercharger

Abstract

A motor housing of an electric motor for an electronic supercharger is configured to be received in an outer housing to jointly define a coolant jacket. The motor housing includes a housing member that at least partially defines a motor cavity for receiving the electric motor. The motor housing also includes a blocking member fixed to the housing member. The blocking member protrudes from the housing member in an outer side direction from an outer surface of the housing member. The housing member and the blocking member are configured to be received in the outer housing to define a coolant jacket and the blocking member separates the coolant jacket. The blocking member is made of a different material from the housing member.

Description

Technical Field

[0001] The present disclosure generally relates to an electronic supercharger device, and more particularly, to a motor cooling system for an electronic supercharger device. Background Art

[0002] An air intake device such as a turbocharger or supercharger is provided, which improves performance by compressing a fluid, which is then fed to a fuel cell stack, an engine, etc. In some cases, an electric boost device is provided, which has an electric motor configured to drive and rotate a compressor impeller to compress an air flow, which is then fed to a fuel cell stack, an engine, etc.

[0003] These induction devices may include a cooling system. For example, in the case of an electronic supercharger device, a cooling system may be provided that directs a coolant through the device to maintain an operating temperature within a predetermined range. For example, an electric motor may be cooled to improve the operating efficiency of the electric motor.

[0004] However, conventional cooling systems for electronic superchargers suffer from various drawbacks, and operating efficiency may be negatively impacted as a result. It may be difficult to provide acceptable cooling for some intake arrangements and / or under certain operating conditions. There may be space constraints that limit the size and / or routing of the cooling circuit, which may negatively impact cooling performance.

[0005] Therefore, it is desirable to provide a cooling system for an electronic supercharger device that improves cooling effectiveness and / or operating efficiency. It is also desirable to provide a compact, highly manufacturable and cost-effective electronic supercharger cooling system. Other desirable features and characteristics of the present disclosure will become apparent from the subsequent detailed description and appended claims, taken in conjunction with the accompanying drawings and this background discussion. Summary of the invention

[0006] In one embodiment, a motor housing for an electric motor of an electronic supercharger is disclosed. The electric motor is configured to drive and rotate the rotor of the electronic supercharger to rotate around an axis. The motor housing is configured to be received in an outer housing to jointly define a coolant jacket. The motor housing includes a shell member that at least partially defines a motor cavity for receiving the electric motor. The motor housing also includes a blocking member fixed to the shell member. The blocking member protrudes from the shell member in an outer side direction from the outer surface of the shell member. The shell member and the blocking member are configured to be received in the outer housing to define a coolant jacket and the blocking member separates the coolant jacket. The blocking member is made of a different material from the shell member.

[0007] In a further embodiment, a motor housing for an electric motor of an electronic supercharger is disclosed. The electric motor is configured to drive and rotate the rotor of the electronic supercharger to rotate around an axis. The motor housing is configured to be received in an outer housing to jointly define a coolant jacket. The motor housing includes a shell member that is metal and formed to define at least a portion of a motor cavity for receiving the electric motor. The motor housing further includes a blocking member fixed to the shell member. The blocking member is molded onto the outer surface of the shell member to be laminated onto and attached to the outer surface. The blocking member protrudes from the outer surface in an outer side direction. The blocking member is made of a material different from the shell member. The shell member and the blocking member are configured to be received in the outer housing to define a coolant jacket and the blocking member separates the coolant jacket.

[0008] In another embodiment, a method for manufacturing a motor housing for an electric motor for an electronic supercharger is disclosed. The electric motor is configured to drive a rotor of the electronic supercharger to rotate about an axis. The motor housing is configured to be received in an outer housing to jointly define a coolant jacket. The method includes a metal-formed shell member, which is metal to form at least a portion of a motor cavity for receiving the electric motor. The method also includes molding a barrier member onto an outer surface of the shell member to be laminated on and attached to the outer surface. The barrier member protrudes from the outer surface in an outboard direction. The shell member and the barrier member are configured to be received in an outer housing to define a coolant jacket and the barrier member separates the coolant jacket. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present disclosure will hereinafter be described in conjunction with the following drawings, wherein like numerals represent like elements, and wherein:

[0010] Figure 1 is a schematic diagram of an electronic boost device incorporated into, for example, a fuel cell system;

[0011] Figure 2 is a cross-sectional view of a motor portion of an electronic supercharger device according to an example embodiment of the present disclosure;

[0012] Figure 3 According to an exemplary embodiment of the present disclosure Figure 2 a first isometric view of a motor housing of a motor portion of the motor;

[0013] Figure 4 yes Figure 2 a second isometric view of a motor housing;

[0014] Figure 5 yes Figure 3 and Figure 4 An exploded view of the motor housing;

[0015] Figure 6 is partly due to Figure 3 a first end view of a cooling system defined by a motor housing;

[0016] Figure 7 yes Figure 6 A cross-sectional view of a cooling system;

[0017] Figure 8 yes Figure 6 A second end view of the cooling system;

[0018] Fig. 9 is manufactured according to an exemplary embodiment of the present disclosure Figure 3-5 A schematic diagram of a method for a motor housing; and

[0019] Figures 10A-10E is a cross-sectional view of a motor housing according to an example embodiment. DETAILED DESCRIPTION

[0020] The following detailed description is merely exemplary in nature and is not intended to limit the disclosure or the application and uses of the disclosure. Furthermore, there is no intention to be bound by any theory presented in the preceding background or the following detailed description.

[0021] In summary, the example embodiments disclosed herein include an improved electronic supercharger. The disclosed electronic supercharger may be a device having an electrically driven compressor impeller that provides a compressed air flow to a downstream component (e.g., an engine, a fuel cell stack, etc.). In addition, the electronic supercharger of the present disclosure may be configured as an electrically assisted turbocharger, an electronic supercharger, a hybrid turbocharger, an electronic supercharger assembly, an electronic turbine, an electronically assisted intake device, or other related components. In particular, an electronic supercharger and a method for manufacturing the same are disclosed, wherein the electronic supercharger also includes a fluid cooling system, through which a coolant (e.g., ethylene glycol) flows to remove heat from the electronic supercharger.

[0022] The electronic supercharger may include a motor housing that encapsulates the electric motor and holds the core windings together. At least a portion of the motor housing may be thermally conductive for transferring heat from the motor to the coolant. The motor housing may have a relatively thin wall thickness (especially compared to conventional motor housings), resulting in reduced mass, lower material costs, and quick and efficient transfer of heat through it to the coolant. The motor housing is also chemically resistant to the coolant. The motor housing may also define one or more fluid boundaries, barriers, baffles, etc. for the coolant flowing through the cooling system. These boundary members (e.g., barriers) may be compact, may be efficiently manufactured, and / or may provide other advantages.

[0023] In some embodiments, the motor housing may include at least one housing member including a shell portion and a blocking member fixed to an outer surface of the shell portion. The shell portion and the blocking member may be made of different materials.

[0024] The shell can be formed of a metal material and / or can include a metal material (e.g., an aluminum alloy, a copper alloy, a zinc alloy, a magnesium alloy, etc.). In addition, the shell can be formed via a metal processing or metal forming process. More specifically, the shell can be formed by a metal blank or workpiece (e.g., a metal sheet) that is plastically deformed via cold working or hot working. The shell can be formed via a stamping process, deep drawing, hydraulic forming, magnetic pulse forming, ultrasonic forming or other forming methods. In these embodiments, the blank can be plastically deformed to include various contours, edges, surfaces and other features of the shell.

[0025] The blocking member may be formed of and / or may include a polymeric material. The blocking member may be fixed to the shell portion and may protrude from the outer surface of the shell portion in an outboard direction. In some embodiments, the blocking member may be overmolded on the shell portion by a selected plastic injection molding technique (e.g., insert molding).

[0026] There may be a plurality of housing components that collectively define the motor housing and collectively encapsulate the motor. In some embodiments, there may be a first housing component and a second housing component, each housing component comprising a respective shell component (e.g., a metal shell component) and a respective barrier component (e.g., a polymer barrier component). Once formed, the housing components may be assembled to encapsulate the motor, and the motor housing may be leak tested.

[0027] The motor housing can enclose a motor having a rotor shaft extending outward from the motor housing. In addition, the motor housing can be positioned within an outer housing of the electronic supercharger. The outer surface of the shell member can be opposite to the inner surface of the outer housing and can be spaced therefrom. In addition, the barrier member can be opposite to the inner surface of the outer housing and can be disposed proximate thereto. Thus, the coolant jacket can be defined between the motor housing and the outer housing. The interface between the barrier member and the outer housing can separate the coolant jacket, separate one area of ​​the coolant jacket from another area, block the coolant, and / or direct the coolant flow through the coolant jacket. Thus, the coolant can flow from the inlet into and through the coolant jacket, and flow to the outlet to remove heat (e.g., from the stator of the motor, from the housing, from the housing, from one or more bearing components, or from other areas proximate to the coolant jacket).

[0028] In some embodiments, there may be one or more sealing members that form a seal between the motor housing and the outer housing. In some embodiments, one or more barrier members may be formed to include features (e.g., grooves) to receive the sealing members. In this way, the barrier members may be simply and effectively formed to secure the sealing members in place.

[0029] Additionally, in some embodiments, the barrier member may be formed to include or at least partially define a gap, orifice, hole, or other void. The gap, etc. may define a fluid passage for coolant to flow from one region of the coolant jacket to another region. In other words, the gap may fluidly connect these regions of the coolant jacket. In some embodiments, the barrier member may include a first portion attached to and overlying the shell member and a second portion separated and spaced from the outer surface of the shell member to define a gap, hole, void, etc.

[0030] Thus, in some embodiments, the coolant jacket may be highly detailed with a tortuous fluid path. The coolant may be directed around the motor housing to effectively remove heat from the electronic supercharger. Several cooling channels may be defined with predetermined shapes, sizes, and flow profiles to provide the desired coolant flow. Furthermore, the disclosed manufacturing method may be used to efficiently, accurately, and repeatably form the motor housing in a high volume manufacturing environment.

[0031] Figure 1 is a schematic diagram of an example electronic boost device 100 according to an example embodiment of the present disclosure. In some embodiments, the electronic boost device 100 may be incorporated into a fuel cell system 102 of a vehicle.

[0032] Generally, the electronic supercharger device 100 may include an electronic supercharger housing 104 and a rotor 106 (ie, a rotating group). The rotor 106 may be supported by one or more bearings within the electronic supercharger housing 104 to rotate about a rotor rotation axis 108.

[0033] The electric supercharger device 100 may include a motor portion 110 . The motor portion 110 may include an electric motor 222 that selectively drives the rotor 106 to rotate about the axis 108 .

[0034] The electric boost device 100 may also include a compressor portion 111 having a compressor impeller that is fixed to the rotor 106 and rotates within the housing 104 (within a compressor housing member). As a result of the rotation of the rotor 106, the compressor portion 111 of the electric boost device 100 may compress the received input air flow 112 into a pressurized air flow 114. The pressurized air flow 114 may be directed to the fuel cell system 102.

[0035] The electric supercharger 100 may also include a turbine section 116. The turbine section 116 may include a turbine wheel fixed to the end of the rotor 106 opposite the compressor section 111, and the turbine wheel may rotate within the housing 104 (within a turbine housing member). The turbine section 116 may be configured to receive a high pressure and high temperature exhaust gas flow 118 from the fuel cell system 102.

[0036] The turbine section 116 may transfer and / or convert energy of the exhaust flow 118. For example, the turbine section 116 may drive the rotor 106 to drive rotation of the compressor section 111. In additional embodiments, the turbine section 116 may be operatively connected to a generator to generate electrical energy for the motor section 110. The high pressure exhaust flow 118 may become a low pressure exhaust flow 124 that is released into a downstream exhaust pipe 126.

[0037] From the compressor section 111, the pressurized air flow 114 may be characterized by an increased temperature above the temperature of the input air flow 112. Therefore, the air flow 114 may be directed through an air cooler 130 (i.e., an intercooler), such as a convection-cooled charge air cooler. The air cooler 130 may be configured to dissipate heat from the air flow 114, increasing its density. The resulting cooled and pressurized air flow 132 may be directed to the fuel cell stack 140, or alternatively, to a subsequent series compressor.

[0038] Hydrogen may be supplied to the fuel cell stack 140 from a tank 142 , and oxygen may be supplied to the fuel cell stack 140 to generate electricity through known chemical reactions. The fuel cell stack 140 may generate electricity for an electrical device such as an electric motor 144 .

[0039] A control system 145 for controlling various systems may be included. The control system 145 may be connected to one or more components via a communication connection 149. The control system 145 may be a computerized system having a processor, various sensors, and other components for electrically controlling the operation of the motor 144, the fuel cell stack 140, and / or the electronic supercharging device 100. In addition, the fuel cell system 102 may be included in a vehicle, such as a car, a truck, a sports utility vehicle, a van, a motorcycle, etc. Therefore, in some embodiments, the electric motor 144 may convert electrical energy into mechanical energy to drive and rotate the axle (and therefore, one or more wheels) of the vehicle. In these embodiments, the control system 145 may be incorporated into a vehicle control unit that controls a plurality of additional vehicle systems (e.g., a braking system, an air conditioning system, etc.).

[0040] Thus, during operation, oxygen may be at least partially supplied by Figure 1The electronic boost device 100 shown is provided to a fuel cell stack 140. More specifically, the motor portion 110 can drive the rotation of the rotor 106, and the compressor portion 111 can provide the pressurized air flow 114 to the air cooler 130 when the pressurized air flow flows to the stack 140, and the exhaust flow 118 from the stack 140 can be returned to the turbine portion 116 to provide power assistance to the motor portion 110. However, it will be understood that other embodiments of the electronic boost device 100 fall within the scope of the present disclosure. For example, in some embodiments, the turbine portion 116 can be omitted so that the electronic boost device 100 includes the motor portion 110 and the compressor portion 111. In addition, in some embodiments, the electronic boost device 100 can include multiple parts, such as multiple compressor parts, which are connected in series fluidly to include a first (low pressure) stage, which feeds a second (high pressure) stage, and the second (high pressure) stage is finally fed to the fuel cell system 102. Furthermore, the electronic boost device 100 may be provided in a system other than the fuel cell system 102 without departing from the scope of the present disclosure.

[0041] It should be understood that the term "electronic supercharger" as used herein should be interpreted broadly, for example, including a device having an electrically driven compressor impeller, regardless of where the electronic supercharger is incorporated, the type of system into which the electronic supercharger is incorporated, etc. It should also be understood that the electronic supercharger of the present disclosure may also be referred to as an electrically driven compressor assembly. In addition, the electronic supercharger of the present disclosure may be configured as an electric supercharger, a hybrid turbocharger, an electronic supercharger device, an electronic turbine, or other related components.

[0042] Reference now Figure 2 , the motor portion 110 is shown in more detail according to an example embodiment. The motor portion 110 may include a motor 222 as described above. The motor 222 may include a stator 224 and a rotor member 226. The rotor member 226 may be fixed to the shaft of the rotor 106, and the rotor member 226 may be received within the stator 224 and may be operatively connected so that the rotor 106 is selectively driven to rotate by the motor 222.

[0043] The motor 222 may be enclosed in a motor housing 228 ( Figure 2 , 3 and 4). Generally, the motor housing 228 can be a hollow, shell-like, thin-walled body. Therefore, the motor housing 228 can include an internal motor cavity 230 therein. The size and dimensions of the motor cavity 230 can correspond to the size and dimensions of the motor 222 to be nested and supported therein. The shaft of the rotor 106 can extend and protrude from opposite sides of the motor housing 228. In addition, the motor housing 228 can basically accommodate, encapsulate and support the motor 222.

[0044] Generally, the motor housing 228 may be cylindrical and / or barrel-shaped. The motor housing 228 may include a first end 201 and a second end 202 extending transversely to the axis 108 and spaced apart from each other along the axis 108. The motor housing 228 may further include a side 203 extending in a circumferential direction around the axis 108. The side 203 may also extend longitudinally between the first end 201 and the second end 202.

[0045] For reference purposes, the “outboard direction” will be discussed with respect to the motor housing 228. For example, in the illustrated embodiment, the outboard direction may be directed longitudinally (i.e., substantially parallel to the axis) away from the first end 201 and away from the motor cavity 230. Furthermore, the outboard direction may be directed longitudinally (i.e., substantially parallel to the axis) away from the second end 202 and away from the motor cavity 230. Furthermore, the outboard direction may be directed radially away from the side 203 of the motor housing 228.

[0046] In contrast, the motor housing 228 can define an inboard direction pointing toward the motor housing 228 and the motor cavity 230 therein. The inboard direction points longitudinally toward the motor cavity 230. Additionally, the inboard direction points radially toward the side 203 of the motor housing 228 and into the motor cavity 230.

[0047] like Figure 2 As shown in , the motor housing 228 can be received and fixedly supported within the outer housing 204. The outer housing 204 can define a portion of the housing 104 of the electronic boost device 100. The outer housing 204 can include one or more solid and stable (e.g., metal) components. The outer housing 204 can be block-shaped, with a generally cylindrical or barrel-shaped outer housing cavity 206. Figure 2 As shown in , the housing cavity 206 can be defined by a first face 208, a second face 209, and a side 210. The motor housing 228 can be received in the housing cavity 206 such that the first end 201 is opposite to the first face 208, the second end 202 is opposite to the second face 209, and the side 203 is opposite to the side 210.

[0048] In addition, the electronic boost device 100 may include a cooling system 250 ( Figure 2 and Figure 6-8 ). The cooling system 250 may include a plurality of fluid channels, reservoirs, passages, circuits, etc. that receive one or more streams of liquid coolant. The cooling system 250 may include at least one inlet, such as a first inlet 212 and a second inlet 213 ( Figure 2). The cooling system 250 may further include a coolant jacket 214. The coolant jacket 214 may be defined by the motor housing 228 and the outer housing 204 so as to surround the motor housing 228. In other words, a majority of the exterior of the motor housing 228 may be smaller than the inner surface of the outer housing cavity 206. Therefore, the exterior of the motor housing 228 may be spaced apart and spaced a distance from the inner surface of the outer housing cavity 206. The space between the exterior of the motor housing 228 and the inner surface of the outer housing cavity 206 may define the coolant jacket 214. The cooling system 250 may additionally include at least one outlet 216 ( Figure 7 ). In some embodiments, liquid coolant may be provided to the coolant jacket 214 via the inlets 212, 213, and the coolant may be exhausted via the outlet 216. As the coolant flows through the cooling system 250, the coolant may remove heat from the electronic supercharger device 100 to maintain high operating efficiency.

[0049] Reference now Figure 3-5 , the motor housing 228 will be discussed in detail according to an example embodiment. In some embodiments, the motor housing 228 may include a plurality of pieces, components, members, etc., which collectively define the motor housing 228 and the motor cavity 230 therein. For example, the motor housing 228 may generally include a first housing member 231 and a second housing member 232, which are fixed together end to end (e.g., removably attached) to collectively define the motor housing 228 and the motor cavity 230 therein. In some embodiments, the first housing member 231 may be referred to as a "sleeve" and the second housing member 232 may be referred to as a "cap" of the motor 222.

[0050] The first housing member 231 may include a first housing member 234. Figure 5 As shown in FIG. 1 , the first shell member 234 can be integral, cup-shaped, and thin-walled (e.g., with a wall thickness as low as one millimeter). This reduced wall thickness can increase heat transfer away from the motor 222. The first shell member 234 can include a circular and plate-like end disk 238 ( Figure 5 ) and an annular ring 240 secured thereto. The annular ring 240 may include one or more features (e.g., a tapered portion, a shoulder, an edge, or other surface feature) that change the diameter of the annular ring 240 as it protrudes from the disk 238. The end disk 238 may include a central hole 242. The ring 240 may protrude from one side of the end disk 238 and terminate at an edge 244. The edge 244 may have a slightly larger diameter than the end disk 238.

[0051] The first shell member 234 can be a formed metal part. Therefore, the first shell member 234 can be a plastic deformation part and a metal processing part. The first shell member 234 can be formed via a cold working process or via a hot working process. The metal processing can be used to effectively and repeatedly form the cup shape of the first shell member 234.

[0052] In addition, the first cover member 231 may include at least one first blocking member 236. The first blocking member 236 may be fixed to the first shell member 234. The first blocking member 236 may be stacked on the outer surface of the first shell member 234 and fixed to the outer surface of the first shell member 234. The first blocking member 236 may also protrude from the outer surface of the first shell member 234 in the outer side direction. Therefore, the first blocking member 236 may be referred to as a "protruding portion" or "outer side portion" that protrudes from the shell member 234 in the outer side direction. The first blocking member 236 may protrude from the first shell member 234 in the outer side direction and have a plurality of smooth outer surfaces, such as a first outer surface 237a. The first outer surface 237a may be smooth and annular, and may face longitudinally and in the outer side direction away from the motor housing 228. The surface 237a may define a portion of the second end 202 of the motor housing 228.

[0053] The first blocking member 236 may include a first circumferential blocking portion 246 that is elongated and laminated on the outer surface of the first shell member 234. The first circumferential blocking portion 246 may extend in a circumferential direction on the first shell member 234. The first circumferential blocking portion 246 may be disposed near the edge 244. The first blocking member 236 may also include a second circumferential blocking portion 248. The second circumferential blocking portion 248 may be elongated, laminated on the outer surface of the first shell member 234, and may extend in a circumferential direction. The second circumferential blocking portion 248 may be disposed near the transition between the edge 244 and the end disk 238. In addition, the first blocking member 236 may include an elongated blocking portion 249. The elongated blocking portion 249 may include a plurality of elongated and straight segments, such as a first segment 245 extending longitudinally along the annular ring 240 and a second segment 247 extending radially along the end disk 238. As Figure 4 and Figure 5 As shown in FIG. , there may be a circumferentially defined space 254 between the ends of the elongated barrier 249 and the second circumferential barrier 248 .

[0054] In some embodiments, the first shell member 234 and the first blocking member 236 can be made of different materials. For example, in some embodiments, the first shell member 234 can be made of a metal material, and the first blocking member 236 can be made of a polymer material. However, it should be understood that in other embodiments, the first shell member 234 and the blocking member 236 can be made of different metal materials. In further embodiments, the first shell member 234 and the blocking member 236 can be made of different polymeric materials. In some embodiments, the first blocking member 236 can be an overmolded polymer member molded onto the outer surface of the first shell member 234.

[0055] The second housing member 232 may include a second housing member 264. Figure 5 As shown in FIG. 1 , the second shell member 264 can be integral, cup-shaped, and thin-walled (e.g., with a wall thickness as low as one millimeter). This reduced wall thickness can increase heat transfer away from the motor 222. The second shell member 264 can include a circular and plate-like end disk 268 ( Figure 5 ) and an annular ring 270 fixed thereto. The annular ring 270 may have a substantially constant diameter. The end disk 268 may include a central hole 272. The ring 270 may protrude from one side of the end disk 268 and terminate at an edge 274. The ring 270 may also include an elongated side opening 276 extending therethrough.

[0056] The second shell member 264 can be a formed metal part. Therefore, the second shell member 264 can be a plastic deformation part and a metal processing part. The second shell member 264 can be formed via a cold working process or via a hot working process. The metal processing can be used to effectively and repeatedly form the cup shape of the second shell member 264.

[0057] In addition, the second housing member 232 may include at least one second blocking member 266. The second blocking member 266 may be fixed to the second housing member 264. The second blocking member 266 may be fixed to the outer surface of the second housing member 264. The second blocking member 266 may also protrude from the outer surface of the second housing member 264 in the outer side direction. Therefore, the second blocking member 266 may be referred to as a "protruding portion" or "outer side portion" that protrudes from the housing member 264 in the outer side direction. The second blocking member 266 may protrude from the second housing member 264 in the outer side direction and have a plurality of smooth outer surfaces, such as a second outer surface 237b and a third outer surface 237c. The second outer surface 237b may be smooth and annular and may face longitudinally and in the outer side direction away from the motor housing 228 to define a portion of the first end 201. The third outer surface 237c may be smooth and annular and may face radially and in the outer side direction away from the motor housing 228 and the axis 108.

[0058] The second blocking member 266 may include an outer skirt 278, which may be elongated and annular, extending around the ring 270. The second blocking member 266 may further include an end blocking portion 279, which is elongated and linear and extends radially along the end disk 268.

[0059] In some embodiments, the second shell member 264 and the second blocking member 266 can be made of different materials. For example, in some embodiments, the second shell member 264 can be made of a metal material, and the second blocking member 266 can be made of a polymer material. However, it should be understood that in other embodiments, the second shell member 264 and the blocking member 266 can be made of different metal materials. In further embodiments, the second shell member 264 and the blocking member 266 can be made of different polymeric materials. In some embodiments, the second blocking member 266 can be an overmolded polymer member molded to the outer surface of the second shell member 264.

[0060] At least one of the first cover shell member 231 and the second cover shell member 232 can be formed according to an embodiment of the manufacturing method of the present disclosure. For example, both can be formed using a combination of metal forming and overmolding processes. In some embodiments, the first cover shell member 231 can be formed by metal forming (e.g., cold working via stamping, pressing or other similar processes) the first shell member 234. Then, the first blocking member 236 can be overmolded onto the first shell member 234. In addition, the second cover shell member 232 can be similarly formed by metal forming the second shell member 264 and then overmolding the second blocking member 266 onto the second shell member 264. The skirt 278 can be overmolded to include an opening aligned with the side opening 276. The shell members 231, 232 can also be heat treated, coated or otherwise treated before further assembly.

[0061] The first housing member 231 and the second housing member 232 may be connected and in some embodiments removably attached ( Figure 3-5 ).like Figure 5 As shown in FIG. 1 , the first housing member 231 can be received in the second housing member 232. The edge 244 of the first housing member 231 can be received within the edge 274 of the second housing member 232. The outer radial surface of the edge 244 can be fluidly sealed to the inner radial surface of the edge 274. Therefore, the annular rings 240, 270, the skirt 278, and the first and second circumferential barriers 246, 248 can extend about the axis 108 and can define the side 203 of the motor housing 228. In addition, the end disk 268 and the end barrier 279 can extend radially relative to the axis 108 and can define the first end 201 of the motor housing 228. In addition, the end disk 238 and the elongated barrier 249 can define the second end 202 of the motor housing 228. The first housing member 231 and the second housing member 232 can be connected and sealed using adhesives, fasteners, interference fit, or other means.

[0062] The motor housing 228 may further include and define at least one through hole, such as the first through hole 296 ( Figure 2-4 and Figure 6 ) and the second through hole 298 ( Figure 3-7 ). The through holes 296, 298 may have any suitable shape and may be referred to as gaps, holes, or other types of openings that allow coolant to pass therethrough to flow between one portion of the coolant jacket 214 and another portion. The through holes 296, 298 may be independently defined to have a continuous fluid boundary extending through the motor housing 228. Thus, while some of the coolant jacket 214 may be defined by both the motor housing 228 and the outer housing 204, the through holes 296, 298 may define a portion of the coolant jacket 214 independently of the outer housing 204.

[0063] exist Figure 3 In some embodiments shown in , the skirt 278 can include an attachment area 273 that is laminated on and attached to the outer surface of the annular ring 270. The skirt 278 also protrudes outwardly in a radial direction from the attachment area 273 and can extend around the ring 270. The skirt 278 can also include a first separation area 275 and a second separation area 271 that are separated from the ring 270. The outer surfaces of the separation areas 271, 275 and the attachment area 273 of the skirt 278 can be flush, as shown in FIG. Figure 3 and 4 , so as to be smooth, continuous and circular.

[0064] The first separation area 275 can extend from one circumferential end of the attachment area 273 to the first section 245 of the elongated barrier 249. The first separation area 275 can also be spaced apart from the outer surface of the shell member 264 in the outboard direction (i.e., radial direction) to define a first through hole 296 therebetween in the radial direction. Thus, the first through hole 296 can extend longitudinally (e.g., substantially parallel to the axis 108) through the motor housing 228 between the shell member 264 and the skirt 278. In addition, the first through hole 296 can be arcuate so as to extend circumferentially relative to the axis 108.

[0065] The second separation area 271 can extend from the opposite circumferential end of the attachment area 273 to the first section 245 of the elongated barrier 249. The second separation area 271 can be spaced apart from the outer surface of the shell member 264 in the outboard direction (i.e., radial direction) to define a second through hole 298 therebetween in the radial direction. Thus, the second through hole 298 can extend longitudinally (e.g., substantially parallel to the axis 108) through the motor housing 228 between the shell member 264 and the skirt 278. In addition, the second through hole 298 can be arcuate so as to extend circumferentially relative to the axis 108.

[0066] Once the first housing member 231 and the second housing member 232 are formed, they can be connected together to enclose the electric motor 222. Then, as shown in FIG. Figure 2 and Figure 6-8 As shown in FIG. 2 , the motor housing 228 can be disposed in the outer housing 204. The motor housing 228 can be nested therein, and the outer surfaces ( Figure 3 , 5 and 9) are located adjacent to the opposite inner faces 208, 209, 210 of the housing cavity 206. For example, the smooth first, second and third surfaces 237a, 237b, 237c ( Figure 3-5 ) can be located near the corresponding smooth portions of the inner faces 208, 209, 210. When positioned therein, the outer surfaces of the first shell member 234 and the second shell member 264 can be spaced a distance from the opposite inner faces 208, 209, 210 of the outer shell cavity 206.

[0067] Therefore, if Figure 2 and Figure 6-8 As shown in FIG. 1 , the coolant jacket 214 may be at least partially defined by the space between the outer surface of the shell members 234 , 264 and the inner surface 208 , 209 , 210 of the outer shell cavity 206 . Figure 2 ) can flow through the space to the outlet 216 ( Figure 7 The first blocking member 236 and the second blocking member 266 may separate the coolant jacket 214 so that the coolant is directed to flow primarily along a predetermined path through the coolant jacket 214 .

[0068] In addition, the assembly 100 may include one or more sealing members. The sealing member may be a separate component that seals to the motor housing 228 and / or the outer housing 204. Thus, the sealing member may define a sealed fluid boundary and further separate the coolant jacket 214. For example, the assembly 100 may include a first sealing member 280 (FIGS. 2, 7, and 8). The first sealing member 280 may be a polymer O-ring that is centered on the axis 108 and may be disposed between and sealed to the end disk 238 and the face 209. As shown in FIG. Figure 7 As shown in FIG. 1 , face 209 may include a groove to receive first sealing member 280. Assembly 100 may additionally include second sealing member 282. Second sealing member 282 may be a polymeric O-ring centered about axis 108 and may be disposed between and seal to the outer radial surface of skirt 278 and side 210. Figure 2 and Figure 7As shown in , the outer skirt 278 may include a groove 284 that receives the second sealing member 282. The groove 284 may be formed by the molding process described above. In addition, the assembly 100 may further include a third sealing member 286. The third sealing member 286 may be a polymer O-ring, which is centered on the axis 108 and may be disposed between and sealed to the end surface of the skirt 278 and the face 208 of the outer shell 204. As shown in Figure 2 and Figure 7 As shown in FIG. 1 , the face 208 may include a groove for receiving the third sealing member 286. In addition, the assembly 100 may further include a fourth sealing member 288 ( Figure 2 and Figure 7 ). The fourth sealing member 288 may be a polymer O-ring that is centered about the axis 108 and may be disposed between and sealed to the end disk 268 and the face 208. Figure 7 As shown in FIG, face 208 may include a groove that receives fourth sealing member 288 .

[0069] Thus, one or more continuous fluid paths may be defined through the coolant jacket 214 from the inlets 212, 213 to the outlet 216. As shown, there may be multiple paths flowing in parallel through the coolant jacket 214 as will be discussed.

[0070] Specifically, a first coolant flow path (ie, a circumferential flow path) may be defined. From the inlet 212 ( Figure 2 ) of coolant may be provided to the first inlet region 290 ( Figure 2 and Figure 4 ), and then provided to the side chamber 281 of the coolant jacket 214. The side chamber 281 can surround the side 203 of the motor housing 228. The side chamber 281 can be defined by the first circumferential barrier 246, the skirt 278, the elongated barrier 249, the outer surface of the first shell member 234, and the face 210 of the outer shell 204. The fluid in the side chamber 281 can flow around the motor housing 228 circumferentially to the outlet area 292 ( Figure 4 and Figure 7 The outlet region 292 may be fluidly connected to the outlet 216 for discharging the coolant ( Figure 7 ).

[0071] In addition, a second coolant flow path (ie, a first end flow path) may be defined. Figure 2) can be provided to the second inlet region 294 and then to the first end chamber 283 of the coolant jacket 214. The first end chamber 283 can surround the end 202 of the motor housing 228. The first end chamber 283 can be defined by the second circumferential barrier 248, the second section 247 of the elongated barrier 249, the first sealing member 280, the end disk 238, and the face 209. The fluid in the first end chamber 283 can flow circumferentially around the motor housing 228 to the space 254 ( Figure 4 ), and then to outlet area 292 for coolant discharge.

[0072] In addition, a third coolant flow path (i.e., a second end flow path) may be defined. The first through hole 296 of the motor housing 228 may fluidly connect the side chamber 281 to the second end chamber 285 of the coolant jacket 214. The second end chamber 285 may surround the end 201 of the motor housing 228. The second end chamber 285 may be defined by the skirt 278, the sealing member 288, the outer surface of the end disc 268, and the face 208 of the second shell member 264. In this coolant flow path, the coolant entering through the first inlet 212 may flow through the first through hole 296 and enter the second end chamber 285. The fluid may flow circumferentially around the end disc 268 to the second through hole 298. The second through hole 298 may fluidly connect and exit the second end chamber 285 to the outlet region 292 of the side chamber 281 of the coolant jacket 214 to be discharged through the outlet 216.

[0073] The through holes 296, 298 through the motor housing 228 provide useful routing of the coolant through the coolant jacket 214. The through holes 296, 298 can be easily formed for arranging the path of the coolant. Various through hole configurations can also be included in additional embodiments. In some embodiments, the through holes can be at an angle relative to the axis 108 or extend radially along a non-linear axis.

[0074] Fig. 9 A method 299 of manufacturing a motor housing 228 is shown in accordance with an example embodiment of the present disclosure. The motor housing 228 may be formed using a manufacturing system 300, which will be discussed in accordance with an example embodiment of the present disclosure.

[0075] The method 299 may include forming the first shell member 234. Fig. 9 As shown in , the first shell member 234 can be formed by a first workpiece 301. In some embodiments, the first workpiece 301 can be a thin flat sheet or plate. In some embodiments, the first workpiece 301 can be made of metal. For example, the first workpiece 301 can be a sheet of aluminum alloy, copper alloy, zinc alloy, magnesium alloy or other metal material. The material can be selected so that the first shell member 234 is strong and durable and is also thermally conductive, chemically resistant and non-magnetic.

[0076] The first workpiece 301 can be metal formed and plastically deformed in the first metal processing system 310. As shown, the first metal processing system 310 can include at least a first die 312 and a second die 314, which are movably supported relative to each other. The dies 312, 314 can be fitted together to define a cavity 316 between them. The workpiece 301 can be placed between the dies 312, 314, and the dies 312, 314 can be actuated toward each other to be formed according to the surface of the cavity 316. Therefore, the first metal processing system 310 can plastically deform the first workpiece 301 (e.g., via cold working) to form the first shell member 234. More specifically, the first metal processing system 310 can be a stamping system, a deep drawing system, a hydraulic forming system, a magnetic pulse forming system, an ultrasonic forming system, or other forming systems. The first shell member 234 can be removed from the cavity 316 for further processing discussed below.

[0077] It should be understood that Fig. 9 The first metalworking station 310 shown in is a schematic illustration of an example embodiment. Additional embodiments may exist in which there are successive stations (collectively indicated at 310) with corresponding dies or other components for gradually forming the first shell member 234. For example, in additional embodiments, the first metalworking system 310 may include different stations and corresponding components for blanking, deep drawing, drawing, re-drawing, re-forging, perforating (e.g., to form the center hole 242), and trimming the workpiece 301 to form the first shell member 234. Once formed, the first shell member 234 may be additionally heat treated, coated, cleaned, polished, textured, or otherwise processed before the first blocking member 236 is formed thereon.

[0078] Next, if Fig. 9 , the first blocking member 236 can be molded to the first shell member 234. For example, the first blocking member 236 can be molded using an overmolding system 320. The overmolding system 320 can include a plurality of interconnected molds 321a, 321b, 321c and a runner system 328. There can also be vents for air to be exhausted when the polymeric material is supplied via the runner system 328.

[0079] The molds 321a, 321b, 321c may be movably supported relative to each other and may fit together to jointly define at least one cavity 324. A runner system 328 may be fluidly connected to the cavity 324. The first shell member 234 may be disposed between the molds 321a, 321b, 321c. At least a portion of the first shell member 234 may be nested against one or more of the molds 321a, 321b, 321c, and another portion of the first shell member 234 may be spaced apart from the inner surface of the cavity 324. Thus, one or more spaces 326a, 326b may be defined to receive polymeric material for overmolding the first barrier member 236 onto the first shell member 234. The runner system 328 may include a plurality of branches for feeding molten polymer to the spaces 326a, 326b. There may be a first space 326a for forming the first circumferential barrier 246. There may be a second space 326b for forming the second circumferential barrier 248. A similar space may exist for the elongated barrier 249 .

[0080] The polymer material used to form the first barrier member 236 can be selected to be chemically resistant to coolants, suitable for overmolding to the first shell member 234, and can be relatively high in thermal conductivity. The barrier member 236 can be cured within the cavity 324 to be formed according to the inner surface of the cavity 324 and attached to the first shell member 234. In addition, there can be internal cooling or heating lines for controlling the temperature of the molding system 320. Once formed, additional coatings can be added or other processing can be performed on the first shell member 231 before the first shell member 231 is connected to the second shell member 232.

[0081] The overmolding system 320 can be configured to improve manufacturing efficiency. For example, the runner system 328 can include multiple branches for simultaneously feeding molten polymer to the spaces 326a, 326b. In addition, the molds 321a, 321b, 321c can be shaped and configured to allow accurate and repeatable molding, and also allow the molded first housing member 231 to be quickly removed therefrom. For example, the molds 321a, 321b, 321c can be configured to avoid protruding from each other in the direction in which the mold is opened. In addition, one or more of the molds 321a, 321b, 321c can be so-called lifters or other components designed to move between such protrusions when the mold is opened.

[0082] In addition, if Fig. 9As shown in , the second shell member 264 can be formed by a second workpiece 302. In some embodiments, the second workpiece 302 can be a thin flat sheet or plate. In some embodiments, the second workpiece 302 can be made of metal. For example, the second workpiece 302 can be a sheet of aluminum alloy, copper alloy, zinc alloy, magnesium alloy or other metal material. The material can be selected to make the second shell member 264 strong and durable, and also thermally conductive, chemically resistant and non-magnetic.

[0083] The second workpiece 302 can be metal formed and plastically deformed in the second metal processing system 340. As shown, the second metal processing system 340 can include at least a first die 342 and a second die 344 that are movably supported relative to each other. The dies 342, 344 can be fitted together to jointly define a cavity 346 between them. The workpiece 302 can be placed between the dies 342, 344, and the dies 342, 344 can be actuated toward each other to be formed according to the surface of the cavity 346. Therefore, the second metal processing system 340 can plastically deform the second workpiece 302 (e.g., via cold working) to form the second shell member 264. More specifically, the first metal processing system 310 can be a stamping system, a deep drawing system, a hydraulic forming system, a magnetic pulse forming system, an ultrasonic forming system, or other forming system. The second shell member 264 can be removed from the cavity 346 for further processing discussed below.

[0084] It should be understood that Fig. 9 The second metalworking station 340 shown in is a schematic illustration of an example embodiment. Additional embodiments may exist in which there are successive stations (collectively indicated at 340) with corresponding dies or other components for gradually forming the second shell member 264. For example, in additional embodiments, the second metalworking system 340 may include different stations and corresponding components for blanking, deep drawing, perforating (e.g., to form the side openings 276 and the center hole 272), and trimming the workpiece 302 to form the second shell member 264. Once formed, the second shell member 264 may be additionally heat treated, coated, cleaned, polished, textured, or otherwise processed before the second barrier member 266 is formed thereon.

[0085] Next, if Fig. 9 , the second blocking member 266 can be molded to the second shell member 264. For example, the second blocking member 266 can be molded using an overmolding system 350. The overmolding system 350 can include a plurality of interconnected molds 361a, 361b, 361c and a runner system 358. There can also be vents for air to be exhausted when the polymeric material is supplied via the runner system 358.

[0086] The molds 361a, 361b, 361c can be movably supported relative to each other and can be fitted together to jointly define at least one cavity 354. The flow channel system 358 can be fluidly connected to the cavity 354. The second shell member 264 can be disposed between the molds 361a, 361b, 361c. At least a portion of the second shell member 264 can be nested against one or more of the molds 361a, 361b, 361c, and another portion of the second shell member 264 can be spaced apart from the inner surface of the cavity 354. Therefore, one or more spaces 356 can be defined for receiving polymeric material for overmolding the second barrier member 266 onto the second shell member 264. The space 356 can be defined for forming a second barrier member 266 such as Fig. 9 The outer skirt 278 shown in FIG. There may be a similar space for forming an end barrier 279.

[0087] The polymer material used to form the second barrier member 266 can be selected to be chemically resistant to coolants, suitable for overmolding to the second shell member 264, and can be relatively high in thermal conductivity. The barrier member 266 can be cured within the cavity 354 to be formed according to the inner surface of the cavity 354 and attached to the second shell member 264. In addition, there can be internal cooling or heating lines for controlling the temperature of the molding system 350. Once formed, additional coatings can be added or other processing can be performed on the second shell member 232 before it is connected to the first shell member 231.

[0088] The overmolding system 350 is configured to improve manufacturing efficiency. For example, the runner system 358 may include multiple branches for feeding molten polymer to the cavity 354. At least one of the molds 361a-361c may be disposed between the second shell member 264 and the cavity 354, for example to form the through holes 296, 298 discussed above. In other words, at least one of the molds 361a-361c may be disposed between the separation region 275 and the outer surface of the shell member 264 to form the through hole 296. The through hole 298 may be similarly formed. In addition, the groove 284 in the skirt 278 may be molded using one or more of the molds 361a-361c. In addition, the molds 361a, 361b, 361c may be formed, shaped and configured to allow accurate and repeatable molding, and also to allow the molded second housing member 232 to be quickly removed therefrom. For example, the molds 361a, 361b, 361c may be configured to avoid protruding outward from each other in the direction in which the mold is opened. Furthermore, one or more of the dies 361a, 361b, 361c may be so-called lifters or other components designed to move between such protrusions when the dies are opened.

[0089] In some embodiments, the barrier member 266 may be overmolded and secured to an outer surface of the second shell member 264 . Figures 10A-10E Additional embodiments are shown where the blocking member 266 can be attached to the second shell member 264. These embodiments can also be used to attach the first blocking member 236 to the first shell member 234.

[0090] For example, Fig. 10A One embodiment of a shell member 402 is shown, which may represent the first shell member 234 or the second shell member 264 . Fig. 10A Also shown is an embodiment of a blocking member 403, which can represent the first blocking member 236 or the second blocking member 266. As shown, the shell member 402 can include at least one hole 408 defined through its thickness. The blocking member 403 can be laminated on the outer surface 404 of the shell member 402, with a portion passing through the hole 408. In addition, the blocking member 403 can include an enlarged inner portion 410 engaged on or near the inner surface 406 of the shell member 402. The enlarged inner portion 410 can be bulbous and can be engaged to the shell member 402 via an interference fit.

[0091] Fig. 10B Additional embodiments of embodiments of a shell member 502 are shown, which may represent the first shell member 234 or the second shell member 264 . Fig. 10B Also shown is an embodiment of a blocking member 503, which can represent the first blocking member 236 or the second blocking member 266. As shown, the shell member 502 can include at least one hole 508 defined through its thickness. The blocking member 503 can be laminated on the outer surface 504 of the shell member 502, with a portion passing through the hole 508. In addition, the blocking member 503 can include an enlarged inner portion 510 engaged on or near the inner surface 506 of the shell member 502. The enlarged inner portion 510 can be bulbous and can be received within a corresponding recess on the inner surface 506 to engage with the shell member 402 via an interference fit. In some embodiments, the inner portion 510 can be flush with the surrounding area of ​​the inner surface 506.

[0092] Fig. 10C A further embodiment of a shell member 602 is shown, which may represent the first shell member 234 or the second shell member 264 . Fig. 10CAlso shown is an embodiment of a blocking member 603, which can represent the first blocking member 236 or the second blocking member 266. As shown, the shell member 602 can include at least one hole 608 defined through its thickness. As shown, there can be a plurality of holes 608, which can taper in width. The blocking member 603 can be stacked on the outer surface 604 of the shell member 602, with a portion passing through the hole 608. In addition, the blocking member 603 can include an enlarged inner portion 610 received in the tapered hole 608. Thus, the inner portion 610 can be engaged to the shell member 602 via an interference fit.

[0093] Fig. 10D A further embodiment of a shell member 702 is shown, which may represent the first shell member 234 or the second shell member 264 . Fig. 10D Also shown is an embodiment of a blocking member 703, which can represent the first blocking member 236 or the second blocking member 266. As shown, the shell member 702 can include at least one hole 708 partially defined by its wall thickness. The blocking member 703 can be stacked on the outer surface 704 of the shell member 702, with a portion of it being received in the hole 708. In addition, the blocking member 703 can include an enlarged inner portion 710 received in the hole 708. The enlarged inner portion 710 can have a cross shape (e.g., an inverted "T" shape). Therefore, the inner portion 710 can be engaged to the shell member 702 via an interference fit.

[0094] Fig.10E A further embodiment of a shell member 802 is shown, which may represent the first shell member 234 or the second shell member 264 . Fig.10E Also shown is an embodiment of a blocking member 803, which can represent the first blocking member 236 or the second blocking member 266. As shown, the shell member 802 can include at least one hole 808 partially defined by its wall thickness. The blocking member 803 can be stacked on the outer surface 804 of the shell member 802, with a portion of it being received in the hole 808. In addition, the blocking member 803 can include an enlarged inner portion 810 received in the hole 808. The enlarged inner portion 810 can have a tapered or wedge shape. Therefore, the inner portion 810 can be engaged to the shell member 802 via an interference fit.

[0095] The motor housing 228 may also include other features for attaching the blocking members 236, 266. For example, the outer surface of at least one of the shell members 234, 264 may be textured (e.g., mechanically, chemically, and / or laser textured) to increase the surface roughness and increase the adhesion of the blocking members 236, 266 thereto. In additional embodiments, the outer surface of at least one of the shell members 234, 264 may be embossed to form a specific feature, and the feature may be used to interlock to the corresponding blocking member 236, 266.

[0096] As described above, the motor housing 228 may be assembled from the first housing member 231 and the second housing member 232 to enclose the motor 222. The wires of the motor 222 may be loaded through the side opening 276, and the motor housing 228 and the motor 222 may be installed in the outer housing 204. As described above, the coolant jacket 214 may be provided with a coolant.

[0097] Thus, the cooling system 250 of the present disclosure provides efficient cooling. The cooling system 250, the motor housing 228, and more generally, the electronic supercharger 100 are very compact and lightweight. The electronic supercharger 100 can be manufactured efficiently and cost-effectively. In addition, due to these manufacturing methods, one or more of the shell members 234, 264 can be standardized for different configurations of the motor housing. Different configurations of blocking members can be added to the same configuration of the shell members 234, 264 to increase design flexibility.

[0098] Although at least one exemplary embodiment has been presented in the foregoing detailed description, it should be understood that there are a large number of variations. It should also be understood that one or more exemplary embodiments are merely examples and are not intended to limit the scope, applicability, or configuration of the present disclosure in any way. On the contrary, the foregoing detailed description will provide a convenient roadmap for implementing the exemplary embodiments of the present disclosure to those skilled in the art. It should be understood that various changes may be made to the functions and arrangements of the elements described in the exemplary embodiments without departing from the scope of the present disclosure as set forth in the appended claims.

Claims

1. A motor housing for enclosing an electric motor of an electronic supercharger, the electric motor being configured to drive and rotate a rotor of the electronic supercharger about an axis, the motor housing being configured to be received in an outer housing, the motor housing together with the outer housing being configured to jointly define a coolant jacket between the motor housing and the outer housing, the motor housing comprising: a housing member at least partially defining a motor cavity for receiving and enclosing the electric motor, the housing member including an outer surface facing away from the motor cavity in an outboard direction; a blocking member molded and fixed to the shell member, the blocking member protruding from the shell member in an outer side direction from an outer surface of the shell member; the shell member and the barrier member being configured to be received within the outer housing, the outer surface being spaced apart from the outer housing to define the coolant jacket therebetween and the barrier member being disposed proximate the outer housing to separate the coolant jacket; and The blocking member is made of a different material from that of the shell member. 2 . The motor housing of claim 1 , further comprising a sealing member sealed to the barrier member and configured to seal to the outer housing to define a sealed fluid boundary.

3. The motor housing according to claim 2, wherein: The barrier member includes a groove, and the sealing member is received in the groove.

4. The motor housing according to claim 1, wherein: The barrier member is made of a polymeric material and the shell member is made of a metallic material.

5. The motor housing according to claim 1, wherein: the barrier member comprising an attachment area attached to the outer surface of the shell member; wherein the blocking member includes a separation region extending from the attachment region and spaced apart from the outer surface in the outboard direction to at least partially define a hole.

6. The motor housing according to claim 1, wherein: The blocking member is elongated to extend in a circumferential direction about the axis.

7. The motor housing according to claim 1, wherein: The blocking member is elongated to extend in a radial direction relative to the axis.

8. The motor housing according to claim 1, wherein: The blocking member is elongated to extend in a longitudinal direction relative to the axis.

9. The motor housing according to claim 1, wherein: The shell member is a first shell member, wherein the barrier member is a first barrier member, and wherein the exterior surface is a first exterior surface; and further comprising a second shell member and a second blocking member fixed to the second shell member, the second blocking member protruding outwardly from a second outer surface of the second shell member; The second barrier member and the second outer surface are configured to define the coolant jacket, and the second barrier member divides the coolant jacket, the second barrier member being made of a different material than the second shell member.

10. The motor housing according to claim 1, wherein: The blocking member has a portion received in the hole of the shell member to attach the blocking member to the shell member.

11. The motor housing according to claim 1, wherein: The barrier member includes a barrier outer surface that is smooth and configured to be disposed adjacent to an opposing inner surface of the outer housing to separate the coolant jacket.

12. The motor housing according to claim 1, wherein: The shell member comprises a formed metal piece, and wherein the barrier member is an overmolded polymer piece overmolded onto the shell member.

13. A motor housing for an electric motor of an electronic supercharger, the electric motor being configured to drive and rotate a rotor of the electronic supercharger about an axis, the motor housing being configured to be received in an outer housing to jointly define a coolant jacket, the motor housing comprising: a first housing member at least partially defining a motor cavity for receiving the electric motor; a first blocking member molded and fixed to the first shell member, the first blocking member protruding in an outboard direction from a first outer surface of the first shell member, the first blocking member being made of a material different from that of the first shell member; a second shell member and a second blocking member molded and fixed to the second shell member, the second blocking member protruding outwardly from a second outer surface of the second shell member; the first shell member and the first barrier member being configured to be received within the outer shell to define the coolant jacket and the first barrier member to divide the coolant jacket; as well as A second blocking member and a second outer surface are configured to define the coolant jacket and the second blocking member divides the coolant jacket, the second blocking member being made of a material different from the second shell member.

14. The motor housing according to claim 13, wherein: The first barrier member is made of a polymeric material and the first shell member is made of a metallic material.

15. The motor housing according to claim 13, wherein: The second case member is attached to the first case member such that the second case member and the first case member together define a motor cavity for enclosing the electric motor.

16. A method of manufacturing a motor housing for an electric motor for an electronic supercharger, the electric motor being configured to drive and rotate a rotor of the electronic supercharger about an axis, the motor housing being configured to be received within an outer casing to jointly define a coolant jacket, the method comprising: metal forming a first housing member, the first housing member being metal to form at least a portion of a motor cavity for receiving an electric motor; and molding a first blocking member onto a first outer surface of the first shell member to overlie and attach to the first outer surface, the first blocking member protruding from the first outer surface in an outboard direction, the first shell member and the first blocking member being configured to be received within the outer shell to define a coolant jacket and the first blocking member partitioning the coolant jacket; metal forming a second housing member, the second housing member being metal to form another portion of the motor cavity for receiving the electric motor; molding a second blocking member onto the second outer surface of the second shell member to be laminated on and attached to the second outer surface, the second blocking member protruding outwardly from the second outer surface; and Also included is attaching the first case member to the second case member to jointly house the motor.

17. The method of claim 16, further comprising providing a sealing member that seals to the motor housing to define a sealed fluid boundary for coolant.

18. The method of claim 16, wherein metal forming the first shell member comprises: The workpiece is cold worked to form a first shell member.

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