Electrical equipment and electric vehicles

Abstract

The present invention provides an electrical device and an electric vehicle, comprising a housing and a power device, wherein the housing forms a closed space, a heat conduction component is arranged in the housing in the closed space, the power device is located in the closed space and is thermally connected to the heat conduction component, the heat conduction component comprises a first heat conduction block, a first blind hole is arranged on the outer surface of the housing, the first blind hole extends from the outer surface of the housing to the first heat conduction block, the electrical device further comprises a first heat pipe and a first heat dissipation fin, the first end of the first heat pipe is inserted into the first blind hole and is thermally connected to the peripheral wall of the first blind hole, and the second end of the first heat pipe is thermally connected to the first heat dissipation fin. Since the heat pipe has a more efficient heat conduction performance, the waste heat can be quickly conducted from the inside of the housing to the outside of the housing, and then heat is conducted through the heat dissipation fins with better heat dissipation performance, thereby further improving the thermal conductivity efficiency of the electrical device, and does not affect the overall airtightness and protection.

Description

Technical Field

[0001] The present invention relates to the field of new energy equipment, and in particular to an electrical device and an electric vehicle. Background Art

[0002] Electric vehicles are environmentally friendly and less polluting because they do not burn gasoline to generate power. They are widely used in tourist attractions and other places with high environmental requirements. Existing electric vehicles are generally equipped with a motor controller and an on-board charger. The motor controller is used to convert the DC power output by the battery into a three-phase AC power supply and drive the motor to rotate, while the on-board charger charges the battery with external energy.

[0003] With the integration of electrical equipment in electric vehicles, such as chargers, motor controllers and other electrical equipment, a variety of power devices are enclosed in the electrical equipment. The power devices include switching tubes, inductors, capacitors or resistors, etc. Power devices will generate waste heat when working, so the waste heat needs to be conducted and dissipated. Since electrical equipment is often used outdoors, there are extremely high requirements for the airtightness and protection level of the electrical equipment. Therefore, it is necessary to optimize the heat dissipation efficiency and airtightness of the electrical equipment on the electric vehicle. Summary of the invention

[0004] A first object of the present invention is to provide an electrical device with high heat conduction efficiency.

[0005] A second object of the present invention is to provide an electric vehicle equipped with the above-mentioned electric device.

[0006] In order to achieve the first objective of the present invention, the present invention provides an electrical device, including a shell and a power device, the shell encloses a closed space, the shell is provided with a heat-conducting component in the closed space, the power device is located in the closed space and is thermally connected to the heat-conducting component, the heat-conducting component includes a first heat-conducting block, the shell is provided with a first blind hole on the outer surface, the first blind hole extends from the outer surface of the shell to the first heat-conducting block, the electrical device also includes a first heat pipe and a first heat dissipation fin, the first end of the first heat pipe is inserted into the first blind hole and is thermally connected to the peripheral wall of the first blind hole, and the second end of the first heat pipe is thermally connected to the first heat dissipation fin.

[0007] It can be seen from the above scheme that a heat-conducting component and a power device are arranged in a closed space, thereby effectively improving the airtightness and protection, and the power device is thermally connected to the heat-conducting component, so that the waste heat on the power device can be efficiently transferred to the heat-conducting block, and the first end of the heat pipe is inserted into the blind hole and extended to the heat-conducting block without destroying the original airtight structure through the blind hole. Then, the waste heat can be transferred from the heat-conducting block to the first end of the heat pipe more quickly. Since the heat pipe has a more efficient thermal conductivity, the waste heat can be quickly conducted from the inside of the shell to the outside of the shell, and then heat is conducted through the heat sink fins with better heat dissipation performance, thereby further improving the thermal conductivity efficiency of the electrical equipment without affecting the overall airtightness and protection.

[0008] A further solution is that the extension direction of the first blind hole is parallel to the extension direction of the first heat conducting block; and the extension direction of the first end of the first heat pipe is parallel to the extension direction of the first blind hole.

[0009] As can be seen from the above, the blind hole extends in the same direction as the heat conductive block, so that the heat pipe can also extend into the end of the heat conductive block, and then the waste heat can be efficiently transferred to the second end of the heat pipe.

[0010] A further solution is that the extension direction of the first end of the first heat pipe is perpendicular to the extension direction of the second end of the first heat pipe; the electrical device includes a plurality of first cooling fins, the plurality of first cooling fins are arranged in parallel, and the second end of the first heat pipe passes through the plurality of first cooling fins.

[0011] A further solution is that a mounting groove is provided on the outer surface of the shell, the mounting groove is located at the radial side of the first blind hole, and a plurality of first heat dissipation fins are arranged in the mounting groove.

[0012] As can be seen from the above, in order to optimize the arrangement of multiple heat sink fins, the heat sink fins are arranged in parallel and set in the mounting grooves, and the bending arrangement of the heat pipes is utilized, thereby improving space utilization.

[0013] A further solution is that the electrical equipment also includes a second heat pipe, a positioning groove is provided on the outer surface of the shell, the positioning groove is located on the radial side of the first blind hole, the extension direction of the positioning groove is perpendicular to the extension direction of the first blind hole, the second heat pipe is located in the positioning groove and is thermally connected to the surrounding wall of the positioning groove, and the second heat pipe is thermally connected to the first heat sink fin.

[0014] As can be seen from the above, for the arrangement of the heat pipe, a positioning groove can be provided on the radial side of the blind hole, and the heat pipe can be arranged in the positioning groove. The waste heat at the bottom of the heat conductive block can be transferred by adding the heat pipe, thereby further improving the heat conduction efficiency.

[0015] A further solution is that the shell includes a base and a cover body, the base is provided with an installation opening, the cover body covers the installation opening, the base and the cover body form a closed space, and the power device, the first heat conductive block and the first blind hole are all arranged on the base.

[0016] As can be seen from the above, circuit devices such as power devices can be installed from the installation opening and sealed with a cover, and the first heat-conducting block and the first blind hole are isolated and arranged, thereby improving the protection of the electrical equipment.

[0017] A further solution is that the heat-conducting component includes a heat-conducting groove and a second heat-conducting block, the heat-conducting groove is located between the first heat-conducting block and the second heat-conducting block, the shell is provided with a second blind hole on the outer surface, the second blind hole extends from the outer surface of the shell to the second heat-conducting block; the electrical equipment also includes a third heat pipe and a second heat dissipating fin, the first end of the third heat pipe is inserted into the second blind hole and is thermally connected to the surrounding wall of the second blind hole, and the second end of the third heat pipe is thermally connected to the second heat dissipating fin.

[0018] A further solution is that the first heat dissipation fins and the second heat dissipation fins are respectively located on two opposite sides of the housing.

[0019] As can be seen from the above, large devices such as inductors can be installed and heat-conducted through the heat-conducting grooves, so the heat-conducting blocks on both sides can conduct heat efficiently. Therefore, another blind hole and heat pipe are set to dissipate heat at the same time, and are located on opposite sides to optimize the layout of the fins.

[0020] A further solution is that the heat-conducting assembly includes a third heat-conducting block, and the shell is provided with a third blind hole on the outer surface, and the third blind hole extends from the outer surface of the shell to the third heat-conducting block; the electrical equipment also includes a fourth heat pipe, the first end of the fourth heat pipe is inserted into the third blind hole and is thermally connected to the surrounding wall of the third blind hole, and the second end of the fourth heat pipe is thermally connected to the first heat sink fin.

[0021] As can be seen from the above, different power devices can be heat-conducted by providing different heat-conducting blocks, and heat can be dissipated at the first heat sink fins by using heat pipes at the same time, thereby effectively improving the utilization rate of the heat sink fins.

[0022] In order to achieve the second object of the present invention, the present invention provides an electric vehicle, comprising the electrical device as described above.

[0023] It can be seen from the above scheme that the electrical equipment of the electric vehicle mainly includes an on-board charger and a motor controller. The electrical equipment can be provided with a heat-conducting component and a power device in a confined space, thereby effectively improving the airtightness and protection. The power device is thermally connected to the heat-conducting component, so that the waste heat on the power device can be efficiently transferred to the heat-conducting block, and the first end of the heat pipe is inserted into the blind hole and extended to the heat-conducting block through the blind hole from the surface without destroying the original airtight structure. Then, the waste heat can be transferred from the heat-conducting block to the first end of the heat pipe more quickly. Since the heat pipe has a more efficient thermal conductivity, the waste heat can be quickly conducted from the inside of the shell to the outside of the shell, and then heat is conducted through the heat sink fins with better heat dissipation performance, thereby further improving the thermal conductivity efficiency of the electrical equipment without affecting the overall airtightness and protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of an embodiment of an electrical device of the present invention.

[0025] Figure 2 It is a structural diagram of an electrical device embodiment of the present invention from another perspective.

[0026] Figure 3 It is a diagram of the internal structure of the base in the embodiment of the electrical equipment of the present invention.

[0027] Figure 4 Detailed description of an exploded view of an electrical device embodiment of the present invention.

[0028] Figure 5 It is a cross-sectional view of the first heat pipe in an embodiment of the electrical device of the present invention.

[0029] Figure 6 It is a cross-sectional view of the second heat pipe in the embodiment of the electrical device of the present invention.

[0030] Figure 7 It is a cross-sectional view of the third heat pipe in the embodiment of the electrical device of the present invention.

[0031] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0032] Reference Figures 1 to 3In this embodiment, the electrical device 1 is an on-board OBC charger. The electrical device 1 includes a housing, a circuit board (not shown) and a power device (not shown) arranged on the circuit board. The housing includes a base 11 and a cover 12. The base 11 forms an installation cavity. The circuit board and the power device are both arranged in the installation cavity. For the specific arrangement method, reference may be made to the invention patent with application number 201910652593.2 entitled “A charger and electric vehicle with a laminated circuit board layout”. The power device includes a power switch tube, an inductor, etc. The base 11 is provided with a heat conduction groove 141 and a heat conduction groove 142 in the installation cavity. The heat conduction groove 141 The heat conducting groove 141 and the heat conducting groove 142 are arranged in the horizontal direction. The heat conducting block 131 is arranged on the right side of the heat conducting groove 141. The heat conducting block 131 extends in a plate shape. The heat conducting blocks 132 and 133 are arranged on both sides of the heat conducting groove 142. The heat conducting blocks 132 and 133 are arranged in a plate shape and surround the heat conducting groove 142. The inductors are respectively arranged in the heat conducting groove 141 and the heat conducting groove 142, and the heat conducting grooves are filled with potting glue. A plurality of power switch tubes are respectively attached to the surface of the heat conducting blocks. When the charger is working, the power switch tubes and the inductors generate waste heat, which is then transferred to the heat conducting groove and the heat conducting block, and then to the outer surface of the housing. The base 11 is provided with an installation opening 11 at the outer end of the installation cavity. The cover 12 covers the installation opening 11 and is fixedly connected to the base 11, so that the base 11 and the cover 12 form a closed space.

[0033] Reference Figures 3 to 7 The base 11 is provided with a mounting groove 161, a mounting groove 162 and a positioning block 15 on a side opposite to the cover body 12. The mounting groove 161 and the mounting groove 162 are located on both sides of the positioning block 15, and the mounting grooves are located on the radial side of the blind hole. The outer surface of the positioning block 15 is provided with a blind hole 41, a blind hole 43, two parallel positioning grooves 42, three blind holes 44 and three blind holes 45. The blind holes 41 and the blind holes 43 are distributed on both sides of the positioning block 15. The blind hole 41 is close to the mounting groove 161, and the blind hole 43 is close to the mounting groove 162. The blind holes 41 and the blind holes 43 extend from the outer surface of the positioning block 15 to the first heat conducting block 131. The extension lengths of the blind holes 41 and the blind holes 43 are substantially the same as the height of the first heat conducting block 131, but the blind holes do not penetrate the first heat conducting block 131. The blind holes have openings in the longitudinal upper part and the lateral side, so as not to affect the airtightness of the enclosed space.

[0034] The electrical device 1 includes a heat pipe 21, a heat pipe 23, two heat pipes 22, three heat pipes 24, three heat pipes 25, a plurality of heat dissipation fins 31 arranged in parallel, and a plurality of heat dissipation fins 32 arranged in parallel. The heat pipes 21 and the heat pipes 23 are arranged in a bent manner. The extension direction of the blind hole 41 is parallel to the extension direction of the first heat conducting block 131. The extension direction of the first end 211 of the heat pipe 21 is parallel to the extension direction of the blind hole 41. The extension direction of the first end 211 of the heat pipe 21 is perpendicular to the extension direction of the second end 212 of the heat pipe 21. The first end 212 of the heat pipe 21 is perpendicular to the extension direction of the second end 213 of the heat pipe 21. 11 is inserted into the blind hole 41 and connected to the peripheral wall of the blind hole 41 by thermal conduction. The heat pipe 21 can be interference fit with the peripheral wall of the blind hole 41. Of course, it can also be filled with fixed thermal conductive glue. The second end 212 of the heat pipe 21 extends from the lateral opening of the blind hole. The second end 212 of the heat pipe 21 is connected to a plurality of heat sink fins 31 by thermal conduction. The heat sink fins 31 are arranged in an arched shape. After the plurality of heat sink fins 31 are arranged, there is a ventilation gap between adjacent heat sink fins 31. The second end 212 of the heat pipe 21 passes through the plurality of heat sink fins 31 and is adjacent to the heat sink fins 31. After the power device generates waste heat, it will be transferred to the heat conductive block 131, and then the waste heat can be efficiently transferred to the first end of the heat pipe 21. Due to the high thermal conductivity of the heat pipe, the waste heat can be quickly transferred to the second end of the heat pipe 21, and then it can also be quickly transferred to the heat sink fins 31, and then the corresponding heat dissipation is performed.

[0035] Based on the same arrangement principle as the heat pipe 21, the first end of the heat pipe 23 extends into the blind hole 43, and the second end of the heat pipe 23 passes through a plurality of heat sink fins 32. The arrangement of the heat sink fins 32 is the same as that of the heat sink fins 31. The heat pipe 23 is adjacent to the heat sink fins 32. The heat sink fins 31 are arranged at the mounting groove 161, and the heat sink fins 32 are arranged at the mounting groove 162, so that the heat sink fins 31 and the heat sink fins 32 are respectively located on both sides of the positioning block 15.

[0036] The two positioning grooves 42 are located on the radial side of the blind hole 41, and the two positioning grooves 42 are arranged to penetrate in the transverse direction. The two positioning grooves 42 are located at the bottom of the mounting groove 141. The two parallel heat pipes 22 are respectively arranged in one positioning groove 42. The heat pipe 22 is interference fit with the positioning groove 42. The first end 221 of the heat pipe 22 passes through the multiple heat dissipation fins 32 and is connected to the multiple heat dissipation fins 32. The second end 222 of the heat pipe 22 passes through the multiple heat dissipation fins 31 and is connected to the multiple heat dissipation fins 31.

[0037] Based on the same arrangement principle of the heat pipe 21 and the blind hole 41, and the same configuration principle of the heat pipe 23 and the blind hole 43, three blind holes 44 extend to the heat conductive block 132, three blind holes 45 extend to the heat conductive block 133, the first end of the heat pipe 24 is interference fit with the blind hole 44, the second end of the heat pipe 24 passes through a plurality of heat dissipating fins 31 and is connected to the plurality of heat dissipating fins 31, the first end of the heat pipe 25 is interference fit with the blind hole 45, the second end of the heat pipe 25 passes through a plurality of heat dissipating fins 32 and is connected to the plurality of heat dissipating fins 32.

[0038] In addition to this embodiment, the application principle of heat pipes and blind holes can also be applied to motor controllers or other electrical equipment. Under the premise of not affecting the airtightness, the heat pipes are extended into the position close to the power device, and the waste heat can be efficiently transferred through the heat pipes, thereby improving the thermal conductivity. The arrangement and number of heat pipes and heat dissipation fins can be set according to actual conditions.

[0039] Electric vehicle embodiment: The electric vehicle is provided with the above-mentioned electrical device, which may be the above-mentioned charger or motor controller.

[0040] As can be seen from the above, the electrical equipment of the electric vehicle mainly includes an on-board charger and a motor controller. The electrical equipment can be provided with a heat-conducting component and a power device in a confined space, thereby effectively improving the airtightness and protection. The power device is thermally connected to the heat-conducting component, so that the waste heat on the power device can be efficiently transferred to the heat-conducting block, and the first end of the heat pipe is inserted into the blind hole and extended to the heat-conducting block through the blind hole from the surface without destroying the original airtight structure. Then, the waste heat can be transferred from the heat-conducting block to the first end of the heat pipe more quickly. Since the heat pipe has a more efficient thermal conductivity, the waste heat can be quickly conducted from the inside of the shell to the outside of the shell, and then heat is conducted through the heat sink fins with better heat dissipation performance, thereby further improving the thermal conductivity efficiency of the electrical equipment without affecting the overall airtightness and protection.

Claims

1. An electrical device, comprising a housing and a power device, wherein the housing encloses a closed space, wherein a heat-conducting component is disposed in the closed space, wherein the power device is located in the closed space and is thermally connected to the heat-conducting component, wherein the heat-conducting component comprises a first heat-conducting block, Features: The shell is provided with a first blind hole on the outer surface, and the first blind hole extends from the outer surface of the shell to the first heat conducting block; The electrical device further comprises a first heat pipe and a first heat dissipation fin, wherein a first end of the first heat pipe is inserted into the first blind hole and is thermally connected to a peripheral wall of the first blind hole, and a second end of the first heat pipe is thermally connected to the first heat dissipation fin; The housing comprises a base and a cover, the base is provided with a mounting opening, the cover covers the mounting opening, the base and the cover form a closed space, and the power device, the first heat conducting block and the first blind hole are all provided on the base; The waste heat generated by the power device will be transferred to the first heat conductive block, and then the waste heat will be transferred to the first end of the first heat pipe. The first end of the first heat pipe extends into a position close to the power device.

2. The electrical device according to claim 1, Features: An extending direction of the first blind hole is parallel to an extending direction of the first heat conducting block; An extending direction of the first end of the first heat pipe is parallel to an extending direction of the first blind hole.

3. The electrical device according to claim 2, Features: An extension direction of the first end of the first heat pipe is perpendicular to an extension direction of the second end of the first heat pipe; The electrical device includes a plurality of the first heat dissipation fins, the plurality of the first heat dissipation fins are arranged in parallel, and the second end of the first heat pipe passes through the plurality of the first heat dissipation fins.

4. The electrical device according to claim 3, Features: The housing is provided with a mounting groove on the outer surface, the mounting groove is located at the radial side of the first blind hole, and a plurality of the first heat dissipation fins are arranged in the mounting groove.

5. The electrical device according to claim 1, Features: The electrical device also includes a second heat pipe. A positioning groove is provided on the outer surface of the shell, and the positioning groove is located on the radial side of the first blind hole. The extension direction of the positioning groove is perpendicular to the extension direction of the first blind hole. The second heat pipe is located in the positioning groove and is thermally connected to the surrounding wall of the positioning groove by thermal conduction. The second heat pipe is thermally connected to the first heat sink fin by thermal conduction.

6. The electrical device according to any one of claims 1 to 5, Features: The heat-conducting assembly comprises a heat-conducting groove and a second heat-conducting block, the heat-conducting groove is located between the first heat-conducting block and the second heat-conducting block, the shell is provided with a second blind hole on the outer surface, and the second blind hole extends from the outer surface of the shell to the second heat-conducting block; The electrical device also includes a third heat pipe and a second heat dissipation fin. The first end of the third heat pipe is inserted into the second blind hole and is thermally connected to the peripheral wall of the second blind hole. The second end of the third heat pipe is thermally connected to the second heat dissipation fin.

7. The electrical device according to claim 6, Features: The first heat dissipation fins and the second heat dissipation fins are respectively located on two opposite sides of the housing.

8. The electrical device according to any one of claims 1 to 5, Features: The heat conduction assembly includes a third heat conduction block, and the shell is provided with a third blind hole on the outer surface, and the third blind hole extends from the outer surface of the shell to the third heat conduction block; The electrical device further includes a fourth heat pipe, a first end of which is inserted into the third blind hole and thermally connected to the peripheral wall of the third blind hole, and a second end of which is thermally connected to the first heat sink fin.

9. Electric vehicles, It is characterized in that The invention comprises an electrical device as claimed in any one of claims 1 to 8.

Images