Liquid-cooled electric motor for BSG, and electric motor casing and cooling structure of liquid-cooled electric motor
Through the design of parallel waterway structure and spoiler heat dissipation column, the problem of low heat dissipation efficiency of series waterways of BSG liquid-cooled motor is solved, and efficient cooling and lightweight shell are achieved, which is suitable for low-pressure waterway conditions.
Patent Information
- Application Number
- PCT/CN2023/105093
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-06-30
- Publication Date
- 2025-01-02
AI Technical Summary
The series waterway heat dissipation efficiency of existing BSG liquid-cooled motors is low, the inner and outer walls of the casing are thick and heavy, making it difficult to manufacture, and it is difficult to apply to low-pressure waterway conditions.
The parallel waterway structure is adopted, including an outer water jacket and an inner water jacket. The first cooling waterway is spiraled along the outer wall of the inner water jacket. The second cooling waterway is a U-shaped waterway. The stator is realized through the parallel connection between the first and second cooling waterways. , rotor and inverter are cooled simultaneously, and the heat dissipation column is used to improve the heat dissipation efficiency, and the cooling water path is controlled through the water discharge port.
It improves heat dissipation efficiency, reduces water channel flow resistance, is suitable for low-pressure working conditions, simplifies the manufacturing process, and reduces the weight of the motor housing.
Smart Images
Figure CN2023105093_02012025_PF_FP_ABST
Abstract
Description
A BSG liquid-cooled motor and its motor housing and cooling structure Technical Field
[0001] The invention relates to a BSG liquid-cooled motor, in particular to a BSG liquid-cooled motor and a motor housing and a cooling structure thereof. Background Art
[0002] A belt-driven starter generator (BSG) is a mild hybrid technology within hybrid powertrains. It integrates an inverter controller with a motor, enabling rapid motor start and stop at idle and energy recovery during braking. Currently, 48V BSG systems are used in some passenger cars. Their installation in the front wheel train of the engine results in limited installation space and high temperatures, significantly impacting motor performance and efficiency. BSG motors typically utilize a liquid cooling system, primarily consisting of a motor water circuit for cooling the stator and rotor, and a controller water circuit for cooling the controller. To reduce motor size and product cost, existing technology integrates the motor and inverter water circuits serially within the motor housing. For example, the motor and inverter water circuits are connected in series: the inverter water inlet is connected to the water inlet pipe, the motor water inlet is connected to the inverter water outlet, and the motor water outlet is connected to the drain pipe. The front cover or rear cover of the motor is integrated with the water channel. The inner and outer walls of the casing are thick, the casing is heavy, and it is difficult to manufacture. It can only manufacture series water channels with large flow resistance and low heat dissipation efficiency. It has high requirements on the water channel pressure of the entire vehicle and is not convenient for application in low-pressure water channel conditions.
[0003] Invention Disclosure
[0004] The technical problem to be solved by the present invention is that the existing technology is not convenient to be applied to external low-pressure water channel working conditions, the heat dissipation efficiency of the series water channel is low, the inner and outer walls of the casing are thick, the casing is heavy and difficult to manufacture, etc., and a BSG liquid-cooled motor and its motor housing and cooling structure are provided.
[0005] In order to achieve the above object, the present invention provides a cooling structure for a BSG liquid-cooled motor, which includes:
[0006] An outer water jacket is provided between the front cover and the rear cover of the BSG liquid-cooled motor, with both ends of the outer water jacket being connected to the front cover and the rear cover respectively;
[0007] An inner water jacket is sleeved inside the outer water jacket, one end of the inner water jacket abuts against the front end cover, and the other end of the inner water jacket is connected to an end of the outer water jacket close to the rear end cover;
[0008] a first cooling water channel, which is provided on the inner water jacket; a water outlet and a water inlet of the first cooling water channel are both provided on the outer water jacket and are respectively connected to the cooling water channel of the BSG liquid-cooled motor;
[0009] A second cooling water channel is provided on the inverter of the BSG liquid-cooled motor;
[0010] a first transfer water channel, provided on the outer water jacket and the rear end cover, wherein the water inlets of the first cooling water channel and the second cooling water channel are both connected to the first transfer water channel, and a transfer water inlet is provided on the first transfer water channel corresponding to the water inlet of the first cooling water channel, and the transfer water inlet is connected to the cooling water path of the BSG liquid-cooled motor; and
[0011] a second transfer water channel, provided on the outer water jacket and the rear end cover, wherein the water inlet of the second cooling water channel is connected to the water inlet of the first cooling water channel through the first transfer water channel, and the water outlet of the second cooling water channel is connected to the water outlet of the first cooling water channel through the second transfer water channel;
[0012] Among them, the cooling water enters the first cooling water channel and the first transfer water channel synchronously from the transfer water inlet, and enters the second cooling water channel through the first transfer water channel, thereby cooling and dissipating the stator, rotor and inverter of the BSG liquid-cooled motor respectively and simultaneously.
[0013] The cooling structure of the above-mentioned BSG liquid-cooled motor, wherein the upper end surface of the outer water jacket abuts against the rear end cover, an outer stop is provided on the inner side of the upper end surface of the outer water jacket, the outer stop abuts against the end surface of the stator of the BSG liquid-cooled motor, and a first gap is provided at the connection between the lower end surface of the outer water jacket and the front end cover.
[0014] The cooling structure of the above-mentioned BSG liquid-cooled motor, wherein an inner stop is provided on the inner side of the lower end surface of the inner water jacket, the inner stop abuts the end surface of the stator, and the outer circumferential surface of the stator is interference-connected with the inner wall of the inner water jacket; the lower end surface of the inner water jacket abuts the front end cover, and a second gap is provided at the connection between the upper end surface of the inner water jacket and the outer water jacket.
[0015] In the cooling structure of the above-mentioned BSG liquid-cooled motor, the first gap and the second gap are both 0.1-1 mm.
[0016] In the cooling structure of the above-mentioned BSG liquid-cooled motor, the first cooling water channel is spirally arranged along the outer wall of the inner water jacket, and a water outlet is provided at the end of the first cooling water channel.
[0017] The cooling structure of the above-mentioned BSG liquid-cooled motor, wherein the second cooling water channel is a U-shaped water channel, which is arranged on the water plate of the inverter, and the cooling water flows into the second transfer water channel from the outlet of the second cooling water channel, and then flows out from the outlet of the first cooling water channel after merging with the cooling water of the first cooling water channel from the outlet of the second transfer water channel.
[0018] The cooling structure of the above-mentioned BSG liquid-cooled motor, wherein a plurality of turbulent heat dissipation columns are arranged in the U-shaped water channel.
[0019] The cooling structure of the above-mentioned BSG liquid-cooled motor, wherein a drain port is also provided on the first adapter water channel, and the drain port is provided directly below the adapter water inlet, and the drain port is connected to the cooling water channel of the BSG liquid-cooled motor; when the drain port is opened, the cooling water directly enters the drain port from the adapter water inlet to avoid entering the BSG liquid-cooled motor for cooling.
[0020] The cooling structure of the above-mentioned BSG liquid-cooled motor, wherein the first transfer water channel is arranged on the outer water jacket and the rear end cover and is staggered to avoid the corner hole; the second transfer water channel is arranged on the outer water jacket and the rear end cover and is staggered to avoid the corner hole.
[0021] In order to better achieve the above-mentioned purpose, the present invention also provides a motor housing of a BSG liquid-cooled motor, which includes a front end cover, a rear end cover and a cooling structure, and the cooling structure is the above-mentioned cooling structure.
[0022] In order to better achieve the above-mentioned purpose, the present invention also provides a BSG liquid-cooled motor, including a motor housing, a stator, a rotor and an inverter, wherein the stator is installed in the motor housing, the rotor is installed and supported on the motor housing corresponding to the stator, and the inverter is connected to the motor housing, wherein the motor housing is the above-mentioned motor housing.
[0023] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.
[0024] BRIEF DESCRIPTION OF THE DRAWINGS
[0025] FIG1 is a schematic structural diagram of a BSG liquid-cooled motor according to an embodiment of the present invention;
[0026] FIG2 is a schematic diagram of the structure of a motor housing according to an embodiment of the present invention;
[0027] FIG3 is a schematic diagram of a cooling structure according to an embodiment of the present invention;
[0028] FIG4 is an exploded view of a motor housing according to an embodiment of the present invention;
[0029] FIG5 is a schematic diagram of the assembly of a motor housing according to an embodiment of the present invention;
[0030] FIG6 is a cross-sectional view taken along line AA of FIG2 ;
[0031] FIG7 is a sectional view taken along line BB of FIG2 ;
[0032] FIG8 is a contour diagram of inlet pressure, whole machine temperature, and inverter temperature according to an embodiment of the present invention.
[0033] Reference numerals 1 motor housing 11 front cover 12 rear cover 121 corner hole 13 cooling structure 131 outer water jacket 1311 outer stop 132 inner water jacket 1321 inner stop 133 first cooling water channel 1331 water outlet 134 second cooling water channel 135 first transfer water channel 1351 transfer water inlet
[0034] 1352 Drain port 136 Second transfer water channel 137 Water plate bottom plate 138 Water plate cover 139 Disturbing heat dissipation column 2 Stator 3 Rotor 4 Inverter 5 Bearing 6 Nail 7 Sealing ring
[0035] Best Mode for Carrying Out the Invention
[0036] The structural principle and working principle of the present invention are described in detail below with reference to the accompanying drawings:
[0037] Referring to Figure 1, Figure 1 is a schematic diagram of the structure of a BSG liquid-cooled motor according to one embodiment of the present invention. The BSG liquid-cooled motor of the present invention comprises a motor housing 1, a stator 2, a rotor 3, and an inverter 4. The stator 2 is mounted within the motor housing 1, the rotor 3 is mounted and supported on the motor housing 1 in correspondence with the stator 2, and the inverter 4 is connected to the motor housing 1. Because the composition, structure, relative positional relationships, connection relationships, and functions of the other components of this motor are relatively mature in the prior art, they will not be described in detail here. The following will only describe the motor housing 1 and cooling structure 13 of the present invention in detail.
[0038] Referring to Figure 2, a schematic diagram of the structure of a motor housing 1 according to one embodiment of the present invention is shown. The motor housing 1 includes a front cover 11, a rear cover 12, and a cooling structure 13. The rotor 3 is mounted on the front and rear covers 11, 12 via bearings 5. Pins 6 penetrate the rear cover 12, the outer water jacket 131, and the front cover 11, securing the inner and outer water jackets 132, 131, and the stator 2 between the front and rear covers 11, 12.
[0039] Referring to Figures 3-5, Figure 3 is a schematic diagram of a cooling structure 13 according to an embodiment of the present invention, and Figure 4 is an exploded view of a motor housing 1 according to an embodiment of the present invention. The cooling structure 13 of the present invention comprises: an outer water jacket 131 disposed between the front end cover 11 and the rear end cover 12 of the BSG liquid-cooled motor, with one end of the outer water jacket 131 connected to the front end cover 11 and the other end abutting the rear end cover; and an inner water jacket 132, sleeved within the outer water jacket 131, with one end abutting the front end cover 11 and the other end connected to the outer water jacket 131. The first cooling water channel 133 is provided on the inner water jacket 132. The water outlet 1331 and the water inlet of the first cooling water channel 133 are both provided on the outer water jacket 131. The water outlet 1331 is connected to the cooling water path of the BSG liquid-cooled motor. The first cooling water channel 133 is formed by the inner water jacket 132 and the outer water jacket 131, and grooves are provided at both ends of the first cooling water channel 133 to place the O-ring 7. The second cooling water channel 134 is provided on the inverter of the BSG liquid-cooled motor. 4; a first transfer water channel 135, which is provided on the outer water jacket 131 and the rear end cover 12, and is preferably staggered to avoid the corner hole 121, the water inlets of the first cooling water channel 133 and the second cooling water channel 134 are both connected to the first transfer water channel 135, and a transfer water inlet 1351 is provided on the first transfer water channel 135 corresponding to the water inlet of the first cooling water channel 133, and the transfer water inlet 1351 is connected to the cooling water path of the BSG liquid-cooled motor; and a second transfer water The second transfer water channel 136 is provided on the outer water jacket 131 and the rear end cover 12, and is preferably staggered to avoid the corner hole 121. One end of the second transfer water channel 136 is connected to the first cooling water channel 133, and the other end of the second transfer water channel 136 is connected to the outlet of the second cooling water channel 134, that is, the water inlet of the second cooling water channel 134 is connected to the water inlet of the first cooling water channel 133 through the first transfer water channel 135, and the water outlet of the second cooling water channel 134 is connected to the water inlet of the first cooling water channel 133 through the first transfer water channel 135. The second transfer water channel 136 is connected to the water outlet 1331 of the first cooling water channel 133 to realize the parallel connection between the first cooling water channel 133 and the second cooling water channel 134; wherein, the cooling water enters the first cooling water channel 133 and the first transfer water channel 135 synchronously from the transfer water inlet 1351, and enters the second cooling water channel 134 through the first transfer water channel 135, thereby realizing the simultaneous cooling and heat dissipation of the stator 2, rotor 3 and inverter 4 of the BSG liquid-cooled motor.
[0040] Referring to Figures 5-7, Figure 5 is a schematic diagram of the assembly of a motor housing 1 according to an embodiment of the present invention, Figure 6 is a cross-sectional view taken along line AA of Figure 2, and Figure 7 is a cross-sectional view taken along line BB of Figure 2. In this embodiment, the upper end surface of the outer water jacket 131 abuts the rear end cover 12. An outer stop 1311 is provided on the inner side of the upper end surface, abutting the axial end surface of the stator 2 of the BSG liquid-cooled motor. A first gap is defined between the lower end surface of the outer water jacket 131 and the front end cover 11. An inner stop 1321 is provided on the inner side of the lower end surface of the inner water jacket 132, abutting the axial end surface of the stator 2. The outer circumferential surface of the stator 2 forms an interference fit with the inner wall of the inner water jacket 132. The lower end surface of the inner water jacket 132 abuts the front end cover 11, and a second gap is defined between the upper end surface of the inner water jacket 132 and the outer water jacket 131. The first gap and the second gap are both 0.1-1 mm.
[0041] Referring to Figure 3 , the first cooling water channel 133 of this embodiment is spirally arranged along the outer wall of the inner water jacket 132. The first cooling water channel 133 preferably has a rectangular cross-section and preferably spirals three times. An outlet 1331 is provided at the end of the first cooling water channel 133. The second cooling water channel 134 is a U-shaped channel, installed on the water plate of the inverter 4. The water plate includes a water plate bottom plate 137 and a water plate cover plate 138. The water plate bottom plate 137 has a U-shaped flow channel groove, which can accommodate cylindrical flow-dispersing heat dissipating elements. Cooling water flows from the outlet of the second cooling water channel 134 into the second transfer water channel 136. The outlet of the second transfer water channel 136 merges with the cooling water from the first cooling water channel 133 and then flows out of the outlet 1331 of the first cooling water channel 133. The first and second cooling water channels 133 and 134 are arranged in parallel, resulting in a compact structure. The U-shaped water channel is equipped with multiple heat-dissipating columns 139, preferably circular columns with a diameter of 2.5-4 mm, preferably 2.5 mm, to provide balanced heat dissipation between the two cooling channels. This ensures high heat dissipation efficiency and is suitable for low-pressure applications. The rear end cover 12, the outer water jacket 131, and the inverter 4 water plate water channel interface are all provided with grooves for O-rings.
[0042] In this embodiment, a drain port 1352 is further provided on the first transfer water channel 135, and the drain port 1352 is arranged directly below the transfer water inlet 1351. The drain port 1352 is connected to the cooling water path of the BSG liquid-cooled motor; when the drain port 1352 is opened, the cooling water directly enters the drain port 1352 from the transfer water inlet 1351 to avoid entering the BSG liquid-cooled motor for cooling.
[0043] During operation, drain port 1352 is blocked, and the cooling water circuit supplies water to the transfer water inlet 1351. Cooling water simultaneously enters the first cooling water channel 133 and the first transfer water channel 135, and then enters the second cooling water channel 134, achieving simultaneous cooling and heat dissipation for the stator 2, rotor 3, and inverter 4. Cooling water entering the first cooling water channel 133 spirals downward along the inner water jacket 132 into the water outlet 1331. Cooling water entering the second cooling water channel 134 flows along the U-shaped water channel into the second transfer water channel 136. The water outlet of the second transfer water channel 136 merges with the cooling water at the end of the first cooling water channel 133, and then flows out of the water outlet 1331 of the first cooling water channel 133. Alternatively, the drain port 1352 is connected to the cooling water circuit and opened, and the cooling water circuit supplies water to the transfer water inlet 1351. The cooling water directly enters the water pipe connected to the drain port 1352 to avoid entering the cooling of the entire machine. When the BSG liquid-cooled motor is shut down, the cooling water circuit of the BSG liquid-cooled motor can be cut off without closing the water circuit of the entire vehicle, and the circulation of the remaining water circuits of the system will not be affected.
[0044] See Figure 8, which shows contour plots of inlet pressure, system temperature, and inverter temperature for one embodiment of the present invention. The simulation settings for this embodiment are as follows: inlet flow rate of 0.2 kg / s, inlet water temperature of 80°C, stator 2 winding loss of 1024 W, iron loss of 283 W, inverter 4 chip loss of 40 W, and a total of 70 W for the capacitor and busbar. The inlet pressure, system temperature, and inverter 4 temperature under different water channel turns and heat sink diameters were examined to evaluate the flow balance and water channel flow resistance of the parallel water channels. The data results are shown in the following table:
[0045] The cooling effect of the first cooling water channel 133 was evaluated based on the temperature of the entire stator, and the cooling effect of the second cooling water channel 134 was evaluated based on the temperature of the inverter 4. The optimal solution was selected based on the principle of selecting low-pressure and high-heat dissipation efficiency water channels. The first 30% of the data (30% low pressure, 30% low temperature) was selected and a contour map was plotted. The contour map shows that the low-pressure and high-heat dissipation efficiency range is: three water channels and a 2.5-4mm diameter turbulent heat dissipation cylinder. Combined with the data table, it can be seen that when the three water channels have a 2.5mm diameter turbulent heat dissipation cylinder, the water channel flow resistance is minimized and the heat dissipation efficiency is maximized.
[0046] The first cooling water channel 133 (the whole machine water channel) and the second cooling water channel 134 (the inverter water channel) of the present invention are connected in parallel. The water outlet 1331 and the water inlet of the first cooling water channel 133 are both provided on the outer water jacket 131. The water inlet of the first cooling water channel 133 is connected to the switching water inlet 1351, the water outlet 1331 is connected to the external drain pipe, and the switching water inlet 1351 is connected to the water pipe; the water inlet of the second cooling water channel 134 is connected to the water inlet of the first cooling water channel 133 through the first switching water channel 135, and the water outlet of the second cooling water channel 134 is connected to the water inlet of the first cooling water channel 133 through the second switching water channel 136. The outlet 1331 of the first cooling water channel 133 is connected to realize the parallel connection between the first cooling water channel 133 and the second cooling water channel 134; the first transfer water channel 135 and the second transfer water channel 136 are both arranged on the rear end cover 12 and the outer water jacket 131, and are staggered to avoid the hanging angle hole 121; a drain port 1352 connected to the transfer water inlet 1351 is provided directly below the transfer water inlet 1351; a raised inner stop 1321 is provided on the lower part of the inner end surface of the inner water jacket 132, the end surface of the inner stop 1321 is in close contact with the stator 2, the lower end surface of the inner water jacket 132 is in close contact with the stop of the front end cover 11, and the upper end surface of the inner water jacket 132 is in close contact with the outer water jacket A first gap is provided between the outer water jacket 131, preferably 0.1-1mm. A raised outer stop 1311 is provided on the upper inner end surface of the outer water jacket 131. The upper end surface of the outer water jacket 131 is in close contact with the rear end cover 12, and the outer stop 1311 is in close contact with the stator 2. A second gap is provided between the lower end surface of the outer water jacket 131 and the front end cover 11, preferably 0.1-1mm. The axial end surface of the stator 2 is in close contact with the inner stop 1321 of the inner water jacket 132 and the outer stop 1311 of the outer water jacket 131. The stator 2 is radially fitted with the inner wall of the inner water jacket 132 in an interference fit, preferably 0-0.2mm. The split housing of this motor enables the fabrication of a transfer water channel, which in turn connects the transfer water channel to the first and second cooling water channels, thereby achieving parallel connection of the first and second cooling water channels.
[0047] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.
[0048] Industrial Applicability
[0049] The present invention adopts parallel water channels suitable for low-pressure working conditions, and the water flow of the first cooling water channel and the second cooling water channel is balanced and has higher heat dissipation efficiency; the use of a split shell facilitates the processing of some water channels of the motor to set up water channels with high heat dissipation efficiency.
Claims
1. A cooling structure (13) of a BSG liquid-cooled motor, characterized in that: include: An outer water jacket (131) is arranged between a front end cover (11) and a rear end cover (12) of the BSG liquid-cooled motor, and two ends of the outer water jacket (131) are respectively connected to the front end cover (11) and the rear end cover (12); An inner water jacket (132) is sleeved inside the outer water jacket (131), one end of the inner water jacket (132) abuts against the front end cover (11), and the other end of the inner water jacket (132) is connected to an end of the outer water jacket (131) close to the rear end cover (12); A first cooling water channel (133) is arranged on the inner water jacket (132); a water outlet and a water inlet of the first cooling water channel (133) are both arranged on the outer water jacket (131) and are respectively connected to the cooling water circuit of the BSG liquid-cooled motor; A second cooling water channel (134) is provided on the inverter (4) of the BSG liquid-cooled motor; A first transfer water channel (135) is arranged on the outer water jacket (131) and the rear end cover (12); the water inlets of the first cooling water channel (133) and the second cooling water channel (134) are both connected to the first transfer water channel (135); a transfer water inlet (1351) is arranged on the first transfer water channel (135) corresponding to the water inlet of the first cooling water channel (133); the transfer water inlet (1351) is connected to the cooling water path of the BSG liquid-cooled motor; as well as a second transfer water channel (136) disposed on the outer water jacket (131) and the rear end cover (12); a water inlet of the second cooling water channel (134) being connected to a water inlet of the first cooling water channel (133) through the first transfer water channel (135); and a water outlet of the second cooling water channel (134) being connected to a water outlet of the first cooling water channel (133) through the second transfer water channel (136); The cooling water enters the first cooling water channel (133) and the first transfer water channel (135) synchronously from the transfer water inlet (1351), and enters the second cooling water channel (134) through the first transfer water channel (135), thereby realizing cooling and heat dissipation of the stator (2), rotor (3) and inverter (4) of the BSG liquid-cooled motor respectively and simultaneously.
2. The cooling structure (13) of the BSG liquid-cooled motor according to claim 1, characterized in that: The upper end surface of the outer water jacket (131) is in contact with the rear end cover (12); an outer stopper (1311) is provided on the inner side of the upper end surface of the outer water jacket (131); the outer stopper (1311) is in contact with the end surface of the stator (2) of the BSG liquid-cooled motor; and a first gap is provided at the connection between the lower end surface of the outer water jacket (131) and the front end cover (11).
3. The cooling structure (13) of the BSG liquid-cooled motor according to claim 2, characterized in that: An inner stop (1321) is provided on the inner side of the lower end surface of the inner water jacket (132), the inner stop (1321) abuts against the end surface of the stator (2), and the outer circumferential surface of the stator (2) is interference-connected with the inner wall of the inner water jacket (132); the lower end surface of the inner water jacket (132) abuts against the front end cover (11), and a second gap is provided at the connection between the upper end surface of the inner water jacket (132) and the outer water jacket (131).
4. The cooling structure (13) of the BSG liquid-cooled motor according to claim 3, characterized in that: The first gap and the second gap are both 0.1-1 mm.
5. The cooling structure (13) of the BSG liquid-cooled motor according to claim 1, characterized in that: The first cooling water channel (133) is arranged in a spiral shape along the outer wall of the inner water jacket (132), and a water outlet is arranged at the end of the first cooling water channel (133).
6. The cooling structure (13) of the BSG liquid-cooled motor according to claim 5, characterized in that: The second cooling water channel (134) is a U-shaped water channel, which is arranged on the water plate of the inverter (4). Cooling water flows from the outlet of the second cooling water channel (134) into the second transfer water channel (136), and then flows out from the outlet of the first cooling water channel (133) after merging with the cooling water of the first cooling water channel (133) from the outlet of the second transfer water channel (136).
7. The cooling structure (13) of the BSG liquid-cooled motor according to claim 6, characterized in that: A plurality of flow-disturbing and heat-dissipating columns (139) are arranged in the U-shaped water channel.
8. The cooling structure (13) of the BSG liquid-cooled motor according to claim 1, characterized in that: The first transfer water channel (135) is also provided with a drain port (1352), and the drain port (1352) is arranged directly below the transfer water inlet (1351), and the drain port (1352) is connected to the cooling water path of the BSG liquid-cooled motor; when the drain port (1352) is opened, the cooling water directly enters the drain port (1352) from the transfer water inlet (1351) to avoid entering the BSG liquid-cooled motor for cooling.
9. The cooling structure (13) of the BSG liquid-cooled motor according to claim 1, characterized in that: The first transfer water channel (135) is arranged on the outer water jacket (131) and the rear end cover (12) and is staggered to avoid the corner hanging hole (121); the second transfer water channel (136) is arranged on the outer water jacket (131) and the rear end cover (12) and is staggered to avoid the corner hanging hole (121).
10. A motor housing (1) of a BSG liquid-cooled motor, characterized in that: It comprises a front end cover (11), a rear end cover (12) and a cooling structure (13), wherein the cooling structure (13) is the cooling structure (13) according to any one of claims 1 to 9.
11. A BSG liquid-cooled motor, comprising a motor housing (1), a stator (2), a rotor (3) and an inverter (4), wherein the stator (2) is mounted in the motor housing (1), the rotor (3) is mounted and supported on the motor housing (1) corresponding to the stator (2), and the inverter (4) is connected to the motor housing (1), characterized in that: The motor housing (1) is the motor housing (1) according to claim 10.
Citation Information
Patent Citations
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