CN214028227U - Motor controller of electric automobile - Google Patents

Motor controller of electric automobile Download PDF

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Publication number
CN214028227U
CN214028227U CN202023194490.3U CN202023194490U CN214028227U CN 214028227 U CN214028227 U CN 214028227U CN 202023194490 U CN202023194490 U CN 202023194490U CN 214028227 U CN214028227 U CN 214028227U
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China
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channel
water
water channel
motor controller
main box
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CN202023194490.3U
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Chinese (zh)
Inventor
张大千
李�浩
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Shenzhen Faraday Electric Drive Co ltd
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Shenzhen Faraday Electric Drive Co ltd
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Priority to CN202023194490.3U priority Critical patent/CN214028227U/en
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Abstract

The utility model discloses a motor controller of an electric automobile, which comprises a main box body, an upper shell, an upper cover plate and a controller circuit, wherein the bottom plate of the main box body comprises a heat dissipation water channel which comprises a water inlet and a water outlet; the controller circuit comprises a heating power device, and the edge of the bottom of the main box body comprises a flange for fixing the lower shell; the heat dissipation water channel comprises an upper water channel, a sewer and a water return channel; the sewer is arranged below the upper water channel, the top of the upper water channel comprises a window, and the window is used as an upper cover plate of a heating power device radiator to close the window of the upper water channel; the sewer is connected with the water inlet, the water return channel is connected with the water outlet, the inlet of the upper water channel is communicated with the sewer, and the outlet of the upper water channel is communicated with the water return channel. The utility model discloses be convenient for integrated DC/DC module, DC/DC module heating power device's radiating effect is good.

Description

Motor controller of electric automobile
[ technical field ]
The utility model relates to an electric automobile especially relates to an electric automobile's machine controller.
[ background art ]
With the requirements of light weight and high power density of new energy automobile parts, the integrated design of the motor controller is imperative.
Application number is CN 201621019493.4's utility model discloses a pure electric vehicles uses motor controller water-cooling heat radiation structure, has solved the poor, not good enough scheduling problem of heat dissipation of prior art leakproofness. A water-cooling heat dissipation structure of a motor controller for a pure electric vehicle is characterized by comprising a main box body, an upper shell and a lower shell; the main box body, the upper shell and the lower shell are combined to form a shell of the motor controller, wherein the main box body is positioned between the upper shell and the lower shell; the water-saving switch box is characterized in that an internal water cavity is arranged in the main box body, a water inlet port and a water outlet port which are communicated with the internal water cavity are respectively arranged on the main box body, one side of the main box body, which faces the upper shell, is an IGBT module mounting area, and one side of the main box body, which faces the lower shell, is a DC/DC module mounting area.
The utility model adopts one-step forming casting, has low production efficiency, cannot form a complex water channel structure, greatly reduces the heat exchange area of the water channel, and leads to poor heat dissipation effect of the water channel; the DC/DC and the IGBT module radiate heat together, and because the heat productivity of the IGBT module is much larger than that of the DC/DC, the heat dissipated into the water channel by the IGBT can influence the heat dissipation of the DC/DC, and the DC/DC device is difficult to operate within an allowable temperature range; the utility model discloses a do not support the product of two kinds of independent states of single motor controller and motor controller + DC/DC.
[ summary of the invention ]
The to-be-solved technical problem of the utility model is to provide the electric automobile's that is convenient for integrated DC/DC module, and the radiating effect is good machine controller.
In order to solve the technical problem, the utility model adopts the technical scheme that the motor controller of the electric automobile comprises a main box body, an upper shell, an upper cover plate and a controller circuit, wherein a bottom plate of the main box body comprises a heat dissipation water channel, and the heat dissipation water channel comprises a water inlet and a water outlet; the controller circuit comprises a heating power device, and the edge of the bottom of the main box body comprises a flange for fixing the lower shell; the heat dissipation water channel comprises an upper water channel, a sewer and a water return channel; the sewer is arranged below the upper water channel, the top of the upper water channel comprises a window, and the window is used as an upper cover plate of a heating power device radiator to close the window of the upper water channel; the bottom of the sewer comprises a window, the sewer is connected with a water inlet, the water return channel is connected with a water outlet, the inlet of the upper water channel is communicated with the sewer, and the outlet of the upper water channel is communicated with the water return channel.
In the motor controller, the bottom of the upper cover plate comprises a plurality of parallel radiating fins, and the radiating fins are inserted into the upper water channel; the top surface of the bottom plate of the main box body comprises a plurality of threaded holes at the periphery of the upper water channel window, the periphery of the upper cover plate comprises a plurality of screw holes, and a plurality of screws penetrate through the screw holes of the upper cover plate and are screwed into the threaded holes at the top surface of the bottom plate of the main box body to fix the upper cover plate on the bottom plate of the main box body.
The water return channel of the motor controller is arranged below the upper water channel and on the side surface of the sewer; the projected area of the sewer is larger than that of the water return channel. The motor controller comprises a lower cover plate, the bottom of the sewer and the bottom of the water return channel respectively comprise a window, and the lower cover plate seals the window of the sewer and the window of the water return channel.
In the motor controller, the sewer comprises a first J-shaped water channel and a second J-shaped water channel; the length of the first J-shaped water channel and the length of the second J-shaped water channel are respectively greater than the length of the water return channel; the second J-shaped water channel is wrapped on the periphery of the first J-shaped water channel; the heat dissipation water channel comprises a water inlet channel and a water outlet channel of the upper water channel, and the water inlet channel and the water outlet channel are vertically arranged; the head of the first J-shaped water channel is connected with a water inlet, the foot of the second J-shaped water channel is connected with the foot of the first J-shaped water channel, and the head of the second J-shaped water channel is connected with the inlet of the upper water channel through a water inlet channel; the first end of the water return channel is connected with the water outlet, and the outlet of the upper water channel is connected with the second end of the water return channel through the water outlet channel.
In the motor controller, the water return channel is a third J-shaped water channel, and the first J-shaped water channel is wrapped on the periphery of the third J-shaped water channel; the head of the third J-shaped water channel is connected with the water outlet, and the outlet of the upper water channel is connected with the foot of the first J-shaped water channel through the water outlet channel.
In the motor controller, the lower cover plate is fixed on the bottom surface of the main box body through screws, a copper bar hole and a cable hole are reserved on the bottom plate of the main box body, and a direct current output interface is reserved on the side surface of the main box body.
The motor controller comprises a lower shell and a DC/DC module, wherein the lower cover plate is used as a radiator of a heating component of the DC/DC module, and the heating component of the DC/DC module is fixed on the bottom surface of the lower cover plate; the flange at the top of the lower shell is connected with the flange at the bottom of the main box body through screws, and the DC/DC module is positioned in the inner cavity of the lower shell.
In the motor controller, the bottom plate of the main box body comprises the copper bar holes and the cable holes, and the power input copper bar of the DC/DC module penetrates through the copper bar holes from the inner cavity of the main box body to enter the lower shell to be connected with the power module of the DC/DC module; and a power supply control signal cable penetrates through the cable hole from the inner cavity of the main box body to enter the lower shell to be connected with the DC/DC module.
In the motor controller, the side surface of the main box body comprises a direct current output interface, and the direct current output interface is provided with a direct current output terminal; the bottom surface of the main box body comprises a connecting hole of a direct current output terminal, and a direct current output end of the DC/DC module is connected with the direct current output terminal through the connecting hole.
The utility model discloses be convenient for integrated DC/DC module, DC/DC module heating power device's radiating effect is good.
[ description of the drawings ]
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a perspective view of a motor controller according to embodiment 1 of the present invention.
Fig. 2 is a front view of a motor controller according to embodiment 1 of the present invention.
Fig. 3 is a sectional view a-a in fig. 2.
Fig. 4 is a sectional view B-B in fig. 3.
Fig. 5 is a cross-sectional view C-C in fig. 3.
Fig. 6 is a perspective view of the main body of embodiment 1 of the present invention.
Fig. 7 is a perspective view of the main body of embodiment 1 of the present invention from another perspective.
Fig. 8 is a perspective view of a motor controller according to embodiment 2 of the present invention.
Fig. 9 is a front view of a motor controller according to embodiment 2 of the present invention.
Fig. 10 is an exploded view of a motor controller according to embodiment 2 of the present invention.
Fig. 11 is a sectional view taken along line G-G in fig. 9.
Fig. 12 is a cross-sectional view taken along line D-D in fig. 11.
Fig. 13 is a cross-sectional view E-E of fig. 11.
FIG. 14 is a sectional view taken along line F-F in FIG. 11
[ detailed description of the invention ]
The motor controller of embodiment 1 of the present invention has a structure as shown in fig. 1 to 7, and includes a main box 100, an upper casing 20, an upper cover plate 30, a lower cover plate 40, and a controller circuit. The upper case 20 is fixed above the main case 100 by screws 21, and forms a cavity in which the controller circuit is mounted.
The bottom plate 10 of the main box 100 has a heat dissipation water channel 10A, and the heat dissipation water channel 10A includes a water inlet 11, a water outlet 12, an upper water channel 13, a sewer 14, and a J-shaped water return channel 15.
The controller circuit comprises a heating power device 01, and the edge of the bottom of the main box 100 is provided with a ring of connecting discs 18 for fixing the lower shell 50.
The sewer 14 and the J-shaped water return channel 15 are arranged below the upper water channel 13, the sewer 14 and the water return channel 15 are separated from the upper water channel 13 by a partition plate 19, and the water return channel 15 is arranged on the side surface of the sewer 14.
The top of the upper water channel 13 has a window 131, the upper cover plate 30 as a heat sink for the heat generating power device is used to close the window of the upper water channel 13, and the heat generating power device 01 is fixed on the top surface of the upper cover plate 30. The upper cover plate 30 has a plurality of parallel heat dissipating fins 31 at the bottom thereof, and the heat dissipating fins 31 are inserted into the upper water passage 13 to improve the heat dissipating effect of the upper cover plate.
The top surface of the bottom plate 10 of the main box body 100 is provided with a plurality of threaded holes at the periphery of the window of the upper water channel 13, the periphery of the upper cover plate 30 is provided with a plurality of screw holes, and the screws 32 pass through the screw holes of the upper cover plate 30 and are screwed into the threaded holes at the top surface of the bottom plate 10 of the main box body 100, so that the upper cover plate 30 is fixed on the bottom plate 10 of the main box body 100.
The bottom surfaces of the sewer 14 and the water return channel 15 are provided with windows, the bottom of the sewer 14 is provided with a window 141, and the bottom of the water return channel 15 is provided with a window 151. The lower cover 40 is fastened to the bottom surface of the bottom plate 10 of the main body 100 by screws while closing the sewage window 141 and the window 151.
The projected area of the sewer 14 on the lower cover plate 40 is larger than that of the sewer 15 on the lower cover plate 40.
The sewer 14 comprises a J-shaped water channel 142 and a J-shaped water channel 143, the J-shaped water channel 15 is wrapped on the periphery of the J-shaped water channel 15, and the J-shaped water channel 143 is wrapped on the periphery of the J-shaped water channel 142.
The length of the J-shaped water channel 142 and the length of the J-shaped water channel 143 are respectively greater than the length of the return channel 15.
The heat sink water channel 10A further includes a water inlet channel 133 and a water outlet channel 132 of the upper water channel 13, and the water inlet channel 133 and the water outlet channel 132 are vertically arranged.
The head of the J-shaped water channel 142 is connected with the water inlet 11, the foot of the J-shaped water channel 143 is smoothly connected with the foot of the J-shaped water channel 142 through an arc-shaped water channel, and the head of the J-shaped water channel 143 is connected with the inlet of the upper water channel 13 through the water inlet channel 133. The first end of the return channel 15 is connected to the outlet 12, and the outlet of the upper channel 13 is connected to the second end of the return channel 15 through the outlet channel 132.
The head of the J-shaped water return channel 15 is connected with the water outlet 12, and the outlet of the upper water channel 13 is connected with the foot part of the J-shaped water channel 142 through the water outlet channel 132.
The cooling water flowing from the water inlet 11 flows through the J-shaped water passage 142 and the J-shaped water passage 143 to cool the lower cover plate 40, and then flows into the upper water passage 13 through the water inlet channel 133 to cool the upper cover plate 30, which is a heat sink for a heat generating power device. The cooling water flowing out from the upper water channel 13 flows out from the water outlet 12 through the water outlet channel 132 and the water return channel 15.
The bottom plate 10 of the main box 100 is reserved with a copper row hole 16 and a cable hole 17, and the side surface of the main box 100 is reserved with a direct current output interface 70.
The utility model discloses embodiment 2 motor controller's structure is as shown in fig. 8 to fig. 13, on embodiment 1 motor controller's basis, still includes casing 50 and DC/DC module 60 down, and lower apron 40 is fixed in the bottom surface of the bottom plate 10 of main box 100 with screw 42 as the radiator of DC/DC module 60 heating element spare, seals sewer window 141 and window 151 simultaneously. The heat generating components of the DC/DC module 60 are fixed to the bottom surface of the lower cover plate 40.
The flange 51 on the top periphery of the lower housing 50 is connected to the flange 18 on the bottom of the main box 100 by screws 52, and the DC/DC module 60 is located in the inner cavity enclosed by the lower housing 50 and the main box 100.
The bottom plate 10 of the main box 100 has a copper bar hole 16 and a cable hole 17, and the power input copper bar 61 of the DC/DC module 60 passes through the copper bar hole 16 from the inner cavity of the main box 100 and enters the lower shell 50 to connect with the power module of the DC/DC module 60. The power control signal cable 62 is inserted from the inner cavity of the main housing 100 through the cable hole 17 into the lower case 50 to be connected to the DC/DC module 60.
The main casing 100 has a dc output port 70 on a side thereof, and the dc output port 70 is provided with a dc output terminal 71. The main housing 100 has a connection hole 73 for a DC output terminal at a bottom surface thereof, and the DC output terminal 63 of the DC/DC module 60 is connected to the DC output terminal 71 through the connection hole 73.
The embodiment of the utility model provides a1 motor controller is single motor controller, can satisfy protection level more than IP67, uses as complete product. The utility model discloses motor controller has integrateed the DCDC power, increases DCDC power module, DCDC power input copper bar module, DCDC power control signal cable, DC output terminal and casing constitution down on single motor controller's basis.
The utility model discloses the main tank body in embodiment 1 and 2 is the die casting, and under the form of single motor controller, the main tank body bottom surface does not have functional requirement, and the die-casting blank can satisfy the requirement, need not to do special treatment, and sewer and return water way need not windowing, need not join in marriage down the apron yet. Under the state that the motor controller integrates a DCDC power supply, the bottom surface of the main box body needs to be machined by the main box body, so that the roughness Ra1.6 and the flatness 0.3 are achieved; the lower parts of the sewer and the water return channel are windowed and sealed by a lower cover plate used as a radiator of the DCDC power module so as to meet the radiating requirement of a DCDC power device. And a plurality of threaded holes are processed for fixing the lower cover plate, the DCDC power supply module, the DCDC power input copper bar module, the DC output terminal and the lower shell. Copper bar holes and cable holes are reserved on a bottom plate of the main box body, and the copper bar holes and the cable holes are opened when a die-cast blank is machined.
Assembling a DCDC power supply module on the bottom surface of the main box body, inputting the DCDC power supply into the copper bar module, and taking high-voltage direct current from the motor controller through the copper bar hole as the current input of the DCDC power supply; the DCDC power supply control signal cable is used for taking the DCDC power supply control signal from the motor controller through the cable hole; and the low-voltage direct current converted by the DCDC power supply is output to the automobile storage battery through the DC output terminal. The lower shell is matched with the main box body to realize sealing, so that the protection level of the whole motor controller integrated DCDC power supply product above IP67 is guaranteed. Embodiments 1 and 2 of the present embodiment adopt compatible structures. The structure realizes the development of two products under the condition of less development investment and less mold investment
The embodiment 1 of the utility model provides a still contain the water course structure that electric machine controller power heating device, DCDC power heating device shared. The water channel is divided into an upper layer and a lower layer, and cooling liquid firstly flows through the lower layer to dissipate heat of the DCDC power heating device and then flows into the upper layer to dissipate heat of the motor controller power heating device.
The DCDC power supply heating device loss of the water channel structure is considered to be small and is marked as P1 of about 300W, the motor controller heating device loss is large and is marked as P2 of about 3500W, and therefore the DCDC heating device is cooled firstly by the water flow structure. Most of heat loss in the water cooling system is transferred to the cooling liquid to flow out of the heat dissipation system, and the heat conducted and radiated out through other ways can be less and can be ignored. The density of the commonly used automobile cooling liquid is recorded as rho, and is about 1049kg/m3The specific heat capacity is recorded as c and is about 3454J/kg.K, and the commonly used flow rate of the automobile cooling system is recorded as q and is about 8L/min. According to the formula
c=Q/(m·△T),
Q=P·t,
m=ρ·T,
T=q·t,
De Δ T ═ P/(ρ · q · c)
Wherein
c is specific heat capacity, unit J/kg.K;
q is heat, in J;
m is mass, unit kg;
Δ T is the change temperature in K;
p is heating power in W;
rho is density, unit kg/m3
T is volume, unit m3
q is the flow rate in m3/s;
t is time, in units of s.
When the cooling liquid flows through the DCDC heating device, neglecting other heat transfer paths, the temperature rise delta T1 is P1/(rho.q.c) is 0.621K; when the cooling liquid flows through the motor controller heating device, the temperature rise delta T2 is P2/(rho.q.c) is 7.245K regardless of other heat transfer paths.
When the coolant liquid flows through lower floor DCDC heating device promptly, temperature rise 0.621K, later flow in the upper strata, because the coolant liquid temperature rise before flowing in the upper strata is less, and the temperature influence of the device that generates heat to machine controller is less, considers the temperature fluctuation of coolant liquid itself and temperature sensor's measuring error, the utility model discloses partial radiating effect of machine controller is equal to the radiating effect of single machine controller approximately in the integrated DCDC power supply product of machine controller of 2. On the contrary, if the coolant flows into the upper layer motor controller part first, when the coolant flows into the lower layer DCDC power supply part, the temperature of the coolant is already increased 7.245K, which directly results in the temperature of the DCDC power supply power device being increased 7.245K, and the DCDC service life is reduced and the capability is reduced.
The utility model discloses above embodiment single motor controller and the integrated DCDC product of motor controller can regard as a product development, and sharing mould, sharing material can regard as two independent product applications simultaneously.
The utility model discloses above embodiment single motor controller upgrades to the integrated DCDC product of motor controller, only needs processing the main tank body, increases spare part and just can realize. The material types are greatly reduced, the inventory pressure is reduced, and the production and operation flexibility is improved.
The utility model discloses above embodiment does not influence the competitiveness of each item index such as cost, power density, ability, life-span, reliability of single electric control ware form product to the compatible structure of DCDC power.

Claims (10)

1. A motor controller of an electric automobile comprises a main box body, an upper shell and a controller circuit, wherein a bottom plate of the main box body comprises a heat dissipation water channel, and the heat dissipation water channel comprises a water inlet and a water outlet; the controller circuit comprises a heating power device, and the edge of the bottom of the main box body comprises a flange for fixing the lower shell; the heat dissipation water channel is characterized by comprising an upper cover plate, wherein the heat dissipation water channel comprises an upper water channel, a sewer and a water return channel; the sewer is arranged below the upper water channel, the top of the upper water channel comprises a window, and the window is used as an upper cover plate of a heating power device radiator to close the window of the upper water channel; the sewer is connected with the water inlet, the water return channel is connected with the water outlet, the inlet of the upper water channel is communicated with the sewer, and the outlet of the upper water channel is communicated with the water return channel.
2. The motor controller according to claim 1, wherein the bottom of the upper cover plate includes a plurality of parallel fins inserted into the upper water passage; the top surface of the bottom plate of the main box body comprises a plurality of threaded holes at the periphery of the upper water channel window, the periphery of the upper cover plate comprises a plurality of screw holes, and a plurality of screws penetrate through the screw holes of the upper cover plate and are screwed into the threaded holes at the top surface of the bottom plate of the main box body to fix the upper cover plate on the bottom plate of the main box body.
3. The motor controller according to claim 1, wherein the water return passage is disposed below the water supply passage, at a side of the sewage passage; the projected area of the sewer is larger than that of the water return channel.
4. The motor controller of claim 3, comprising a lower cover plate, wherein the bottom of the sewer and the bottom of the backwater channel each comprise a window, and the lower cover plate closes the window of the sewer and the window of the backwater channel.
5. The motor controller of claim 3, wherein the sewer includes a first J-channel and a second J-channel; the length of the first J-shaped water channel and the length of the second J-shaped water channel are respectively greater than the length of the water return channel; the second J-shaped water channel is wrapped on the periphery of the first J-shaped water channel; the heat dissipation water channel comprises a water inlet channel and a water outlet channel of the upper water channel, and the water inlet channel and the water outlet channel are vertically arranged; the head of the first J-shaped water channel is connected with a water inlet, the foot of the second J-shaped water channel is connected with the foot of the first J-shaped water channel, and the head of the second J-shaped water channel is connected with the inlet of the upper water channel through a water inlet channel; the first end of the water return channel is connected with the water outlet, and the outlet of the upper water channel is connected with the second end of the water return channel through the water outlet channel.
6. The motor controller of claim 5 wherein the water return channel is a third J-shaped water channel, the first J-shaped water channel wrapping around the periphery of the third J-shaped water channel; the head of the third J-shaped water channel is connected with the water outlet, and the outlet of the upper water channel is connected with the foot of the first J-shaped water channel through the water outlet channel.
7. The motor controller according to claim 4, wherein the lower cover plate is fixed to the bottom surface of the main case by screws, a copper row hole and a cable hole are reserved on the bottom plate of the main case, and a direct current output interface is reserved on the side surface of the main case.
8. The motor controller according to claim 4, comprising a lower casing and a DC/DC module, wherein the lower cover plate is used as a radiator of a heating component of the DC/DC module, and the heating component of the DC/DC module is fixed on the bottom surface of the lower cover plate; the flange at the top of the lower shell is connected with the flange at the bottom of the main box body through screws, and the DC/DC module is positioned in the inner cavity of the lower shell.
9. The motor controller according to claim 8, wherein the bottom plate of the main box body comprises copper bar holes and cable holes, and the power input copper bars of the DC/DC module pass through the copper bar holes from the inner cavity of the main box body to enter the lower shell to be connected with the power module of the DC/DC module; and a power supply control signal cable penetrates through the cable hole from the inner cavity of the main box body to enter the lower shell to be connected with the DC/DC module.
10. The motor controller according to claim 8, wherein the side of the main housing includes a dc output interface, the dc output interface being provided with a dc output terminal; the bottom surface of the main box body comprises a connecting hole of a direct current output terminal, and a direct current output end of the DC/DC module is connected with the direct current output terminal through the connecting hole.
CN202023194490.3U 2020-12-25 2020-12-25 Motor controller of electric automobile Active CN214028227U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202023194490.3U CN214028227U (en) 2020-12-25 2020-12-25 Motor controller of electric automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202023194490.3U CN214028227U (en) 2020-12-25 2020-12-25 Motor controller of electric automobile

Publications (1)

Publication Number Publication Date
CN214028227U true CN214028227U (en) 2021-08-24

Family

ID=77342856

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202023194490.3U Active CN214028227U (en) 2020-12-25 2020-12-25 Motor controller of electric automobile

Country Status (1)

Country Link
CN (1) CN214028227U (en)

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