Electric vehicle charger

Abstract

The invention belongs to the technical field of electric vehicles, and discloses an electric vehicle charger which comprises a shell, a circuit board, a radiator and a heat transfer piece. The shell is provided with a containing cavity, the containing cavity is provided with heat dissipation holes, the circuit board is installed on the shell and used for achieving connection between the photovoltaic panel and the electric vehicle so that the photovoltaic panel can charge the electric vehicle, and the radiator is installed in the shell and provided with heat dissipation fins extending into the heat dissipation holes. The heat transfer piece is installed on the side, away from the heat dissipation holes, of the radiator and abuts against the circuit board. The heat transfer piece is used for transferring heat of the circuit board to the radiator. The electric vehicle charger is good in heat dissipation effect, can well prevent the temperature of the charger from being too high in the charging process, and is beneficial to improving the charging efficiency, shortening the charging time and improving the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and in particular to an electric vehicle charger. Background Art

[0002] The principle of solar chargers is mainly the process of converting sunlight energy into electrical energy. Light absorption generates electron-hole pairs, establishes a potential difference, and connects to a boost circuit to output a stable voltage output to charge electric vehicles. Since solar chargers are heated by direct sunlight and the load temperature of power devices during use, the charger temperature is too high, triggering the charger protection and intermittent charging, which reduces charging efficiency, prolongs charging time, and reduces the user experience. Summary of the invention

[0003] The object of the present invention is to provide an electric vehicle charger, which has a good heat dissipation effect and can better avoid the charger temperature from being too high during the charging process, which is beneficial to improving the charging efficiency, shortening the charging time, and improving the user experience.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] The present invention discloses an electric vehicle charger, comprising: a shell, the shell having a containing cavity, the containing cavity having a heat dissipation hole; a circuit board, the circuit board is installed in the shell, the circuit board is used to realize the connection between a photovoltaic panel and an electric vehicle, so that the photovoltaic panel can charge the electric vehicle; a radiator, the radiator is installed in the shell, the radiator has heat dissipation fins extending into the heat dissipation hole; a heat transfer element, the heat transfer element is installed on a side of the radiator away from the heat dissipation hole and stops at the circuit board, the heat transfer element is used to transfer the heat of the circuit board to the radiator.

[0006] In some embodiments, a protruding inductor element is provided on the circuit board, a receiving groove for receiving the inductor element is provided on the heat sink, and the heat transfer element is provided between a groove wall of the receiving groove and the inductor element.

[0007] In some embodiments, a power MOS tube is further provided on the circuit board, a protrusion corresponding to the power MOS tube is provided on the heat sink, and the heat transfer element is provided between the protrusion and the power MOS tube.

[0008] In some embodiments, the housing includes a top shell and a bottom shell, the top shell is detachably connected to the bottom shell, the heat dissipation holes are provided on the top shell, and the circuit board is fixed to the bottom shell.

[0009] In some specific embodiments, a fixing column is provided on the bottom shell, a fixing hole is provided on the circuit board, and a fixing member passes through the fixing hole and is connected to the fixing column to fix the circuit board on the bottom shell; wherein: there are multiple fixing holes, and the multiple fixing holes are arranged at intervals along the outer contour of the circuit board.

[0010] In some specific embodiments, one of the bottom shell and the top shell is provided with a latching protrusion, and the other of the bottom shell and the top shell is provided with a latching groove matched with the latching protrusion.

[0011] In some specific embodiments, a convex ring portion arranged around the heat dissipation hole is provided on the inner side wall of the top shell facing the bottom shell, the convex ring portion is arranged around the heat dissipation fins, and the convex ring portion is connected to the heat sink.

[0012] In some more specific embodiments, the heat sink is provided with a mounting ear, the convex ring portion is provided with a mounting column, and the mounting member passes through the mounting ear and is connected to the mounting column to fix the heat sink to the convex ring portion; wherein: there are multiple mounting ears, and along the length direction of the heat sink fin, the multiple mounting ears are respectively located on both sides of the heat sink fin, and the multiple mounting ears on the same side are arranged at intervals.

[0013] In some embodiments, the electric vehicle charger further includes a glue potting member, which fills the accommodating cavity and wraps the components on the circuit board and the heat transfer member.

[0014] In some embodiments, two opposite sides of the shell are provided with wire outlet holes; the circuit board is provided with wire outlet terminals corresponding to the wire outlet holes and extending out of the wire outlet holes, and the two wire outlet terminals are respectively used to connect to the photovoltaic panel and the electric vehicle.

[0015] Beneficial effects of the present invention: Since the electric vehicle charger of the present invention has a heat transfer element and a radiator, the heat transfer element is installed on the radiator and stops at the circuit board. During the operation of the electric vehicle charger, the heat transfer element can transfer the heat of the circuit board to the radiator, and the heat dissipation fins of the radiator can export the heat of the radiator to the air, thereby reducing the temperature of the electric vehicle charger during operation, and can better avoid the charger temperature from being too high during charging, which is beneficial to improving charging efficiency, shortening charging time, and improving user experience.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an electric vehicle charger according to an embodiment of the present invention;

[0018] Figure 2 is a schematic diagram of the exploded structure of an electric vehicle charger according to an embodiment of the present invention;

[0019] Figure 3 yes Figure 2 A schematic diagram of the structure in another direction of the structure shown;

[0020] Figure 4 is a schematic structural diagram of a radiator according to an embodiment of the present invention;

[0021] Figure 5 is a schematic structural diagram of a top shell according to an embodiment of the present invention;

[0022] Figure 6 2 is a schematic structural diagram of a bottom shell according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] 100, housing; 110, top housing; 111, heat dissipation hole; 112, card slot; 1121, protrusion; 113, convex ring; 1131, mounting column; 114, slot; 120, bottom housing; 121, fixing column; 122, card protrusion; 1221, groove; 123, plug-in edge;

[0025] 200, circuit board; 210, inductor element; 220, power MOS tube; 230, fixing hole;

[0026] 300, heat sink; 310, heat dissipation fins; 320, receiving groove; 330, protrusion; 340, mounting ear; 400, outlet terminal. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0031] The present invention discloses an electric vehicle charger, referring to Figure 1-Figure 3 As shown, the electric vehicle charger of this embodiment includes a shell 100, a circuit board 200, a radiator 300 and a heat transfer element (not shown in the figure), the shell 100 has a accommodating cavity, the accommodating cavity has a heat dissipation hole 111, the circuit board 200 is installed in the shell 100, the circuit board 200 is used to realize the connection between the photovoltaic panel and the electric vehicle, so that the photovoltaic panel can charge the electric vehicle, the radiator 300 is installed in the shell 100, the radiator 300 has heat dissipation fins 310 extending into the heat dissipation hole 111, the heat transfer element is installed on the side of the radiator 300 away from the heat dissipation hole 111 and stops at the circuit board 200, and the heat transfer element is used to transfer the heat of the circuit board 200 to the radiator 300. It can be understood that, since the electric vehicle charger of this embodiment has a heat transfer element and a radiator 300, the heat transfer element is installed on the radiator 300 and stops at the circuit board 200. During the operation of the electric vehicle charger, the heat transfer element can transfer the heat of the circuit board 200 to the radiator 300, and the heat dissipation fins 310 of the radiator 300 can export the heat of the radiator 300 to the air, thereby reducing the temperature of the electric vehicle charger during operation, and can better avoid the charger temperature from being too high during charging, which is beneficial to improving the charging efficiency, shortening the charging time, and improving the user experience.

[0032] Optionally, in the embodiment of the present invention, the type of the heat transfer element can be selected from thermal grease or thermal gel according to actual needs, as long as it has good heat transfer performance.

[0033] refer to Figure 2-Figure 4As shown, the circuit board 200 is provided with a protruding inductor element 210, the heat sink 300 is provided with a receiving groove 320 for receiving the inductor element 210, and a heat transfer element is provided between the groove wall of the receiving groove 320 and the inductor element 210. It can be understood that in the actual working process, the inductor element 210 is a component with a large volume and a large amount of heat on the circuit board 200, and the heat sink 300 is provided with a receiving groove 320 for receiving the inductor element 210, and the heat transfer element is sandwiched between the groove wall of the receiving groove 320 and the inductor element 210, which can increase the contact area between the inductor element 210 and the heat sink 300, so that the heat generated by the inductor element 210 can be transferred to the heat sink 300 more quickly, thereby helping to improve the heat dissipation effect of the electric vehicle charger.

[0034] refer to Figure 2-Figure 4 As shown, the circuit board 200 is also provided with a power MOS tube 220, and the heat sink 300 is provided with a protrusion 330 corresponding to the power MOS tube 220, and a heat transfer member is provided between the protrusion 330 and the power MOS tube 220. It can be understood that in the actual working process, the inductor element 210 is a component with a smaller volume and more heat on the circuit board 200, and the heat sink 300 is provided with a protrusion 330 that stops against the power MOS tube 220, and the heat transfer member is sandwiched between the protrusion 330 and the power MOS tube 220, which can increase the contact area between the power MOS tube 220 and the heat sink 300, so that the heat generated by the power MOS tube 220 can be transferred to the heat sink 300 more quickly, thereby helping to improve the heat dissipation effect of the electric vehicle charger.

[0035] Of course, it should be additionally explained here that other power components are also provided on the circuit board 200. In order to ensure the heat dissipation efficiency of other power components, corresponding receiving grooves 320 or protrusions 330 can be provided on the heat sink 300 according to the size and distribution position of the power components.

[0036] refer to Figure 2 , Figure 5 and Figure 6 As shown, the housing 100 includes a top housing 110 and a bottom housing 120, the top housing 110 is detachably connected to the bottom housing 120, the heat dissipation holes 111 are provided on the top housing 110, and the circuit board 200 is fixed to the bottom housing 120. It can be understood that in the actual working process, the radiator 300 is installed on the top housing 110, and then the circuit board 200 is fixed on the bottom housing 120, and the assembly of the electric vehicle charger can be completed. This structure of splitting the housing 100 into two parts facilitates the assembly of the entire electric vehicle charger, which is conducive to improving the manufacturing efficiency of the electric vehicle charger.

[0037] Optionally, the top shell 110 is provided with a slot 114 extending along its contour, and the bottom shell 120 is provided with a plug-in edge 123 set with the slot 114. The plug-in connection between the slot 114 and the plug-in edge 123 is helpful to improve the connection stability of the top shell 110 and the bottom shell 120, thereby ensuring the reliability of the electric vehicle charger, ensuring the connection sealing between the bottom shell 120 and the bottom shell 120, and preventing external foreign matter from entering the interior of the shell 100, thereby reducing the short circuit probability of the electric vehicle charger. Of course, in other embodiments of the present invention, the top shell 110 is provided with a plug-in edge 123, and the bottom shell 120 is provided with a slot 114. In addition, in order to improve the connection sealing between the top shell 110 and the bottom shell 120, additional structures such as a sealing ring sandwiched between the top shell 110 and the bottom shell 120 can also be provided.

[0038] refer to Figure 2 and Figure 6 As shown, a fixing column 121 is provided on the bottom shell 120, a fixing hole 230 is provided on the circuit board 200, and a fixing member passes through the fixing hole 230 and is connected to the fixing column 121 to fix the circuit board 200 on the bottom shell 120. It can be understood that in the actual assembly process, the circuit board 200 is installed on the bottom shell 120, and the fixing hole 230 is aligned with the fixing column 121, and finally the fixing member is passed through the fixing hole 230 and connected to the fixing column 121 to fix the circuit board 200 on the bottom shell 120. In this way, the circuit board 200 can be accurately and stably fixed on the bottom shell 120, which is conducive to improving the working reliability of the electric vehicle charger. In this embodiment, the fixing member can be a screw or a pin.

[0039] Optionally, there are multiple fixing holes 230, and the multiple fixing holes 230 are arranged at intervals along the outer contour of the circuit board 200. The connection between the circuit board 200 and the bottom shell 120 is realized by multiple fixing members, which can further improve the connection stability of the circuit board 200.

[0040] It should be supplemented that, in other embodiments of the present invention, the circuit board 200 and the bottom shell 120 may also be directly snap-connected or bonded, and are not limited to the aforementioned connection method.

[0041] refer to Figure 2 , Figure 5 and Figure 6As shown, a protrusion 122 is provided on the bottom shell 120, and a slot 112 that cooperates with the protrusion 122 is provided on the top shell 110. It can be understood that the bottom shell 120 and the top shell 110 are connected by the clamping of the protrusion 122 and the slot 112, without the need to use connecting parts such as screws or pins, which is conducive to facilitating the assembly of the shell 100, thereby facilitating the production efficiency of the electric vehicle charger. Optionally, a protrusion 1121 is provided on the groove wall of the slot 112, and a groove 1221 that cooperates with the protrusion 1121 is provided on the protrusion 122. In the process of inserting the protrusion 122 into the slot 112, the protrusion 1121 can be inserted into the groove 1221, which can improve the connection strength of the slot 112 and the protrusion 122, thereby improving the connection stability of the top shell 110 and the bottom shell 120. Optionally, there are multiple protrusions 122 and slots 112, and they are arranged at intervals along the outer contours of the bottom shell 120 and the top shell 110. Thus, the connection stability between the top shell 110 and the bottom shell 120 can be further improved. Of course, in other embodiments, the protrusion 122 can also be provided on the top shell 110, and the slot 112 can be provided on the bottom shell 120.

[0042] refer to Figure 2 and Figure 5 As shown, a convex ring portion 113 arranged around the heat dissipation hole 111 is provided on the inner side wall of the top shell 110 facing the bottom shell 120, the convex ring portion 113 is arranged around the heat dissipation fin 310, and the convex ring portion 113 is connected to the heat sink 300. It can be understood that the connection between the convex ring portion 113 and the heat sink 300 can ensure that the heat sink 300 is stably installed inside the housing 100, and ensure that the heat dissipation fin 310 can be stably fitted in the heat dissipation hole 111, so as to help ensure the heat dissipation efficiency of the heat dissipation fin 310.

[0043] refer to Figure 4 and Figure 5 As shown, the radiator 300 is provided with a mounting ear 340, the convex ring portion 113 is provided with a mounting column 1131, and the mounting piece passes through the mounting ear 340 and is connected to the mounting column 1131 to fix the radiator 300 to the convex ring portion 113. It can be understood that in the actual assembly process, the radiator 300 is inserted into the middle of the convex ring portion 113 so that the heat dissipation fin 310 is inserted into the heat dissipation hole 111, and it is ensured that the mounting column 1131 and the mounting ear 340 are correspondingly arranged, and then the mounting piece is passed through the mounting ear 340 and connected to the mounting column 1131 to fix the radiator 300 to the convex ring portion 113. In this way, the radiator 300 can be accurately and stably fixed to the top shell 110, which is conducive to improving the working reliability of the electric vehicle charger. In this embodiment, the fixing member can be a screw or a pin.

[0044] Optionally, there are multiple mounting ears 340, and along the length direction of the heat dissipation fin 310, the multiple mounting ears 340 are respectively located on both sides of the heat dissipation fin 310, and the multiple mounting ears 340 on the same side are arranged at intervals. In this way, the connection stability between the heat sink 300 and the top case 110 can be further improved.

[0045] refer to Figure 1-Figure 3 As shown, two opposite sides of the housing 100 are provided with outlet holes; the circuit board 200 is provided with outlet terminals 400 which are arranged corresponding to the outlet holes and extend out of the outlet holes, and the two outlet terminals 400 are used to connect to the photovoltaic panel and the electric vehicle respectively. It can be understood that the additional outlet terminals 400 can ensure that the circuit board 200 is stably connected to the photovoltaic panel and the electric vehicle, and can avoid the wires from being damaged by friction with the housing 100, thereby helping to improve the safety of the electric vehicle charger.

[0046] Optionally, the electric vehicle charger further includes a glue potting member, which is filled in the accommodating cavity and wraps the components and heat transfer member on the circuit board 200. Thus, the circuit board 200 can be well protected, and the probability of damage to the circuit board 200 when the electric vehicle charger is subjected to a large external force is reduced. Further optionally, in order to ensure the heat dissipation efficiency of the electric vehicle charger, the glue potting member uses a colloid with a high thermal conductivity.

[0047] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An electric vehicle charger, characterized in that: include: A housing (100), the housing (100) having a receiving cavity, the receiving cavity having a heat dissipation hole (111); A circuit board (200), the circuit board (200) being mounted on the housing (100), and the circuit board (200) being used to realize the connection between the photovoltaic panel and the electric vehicle, so that the photovoltaic panel can charge the electric vehicle; A radiator (300), the radiator (300) being installed in the housing (100), the radiator (300) having heat dissipation fins (310) extending into the heat dissipation holes (111); A heat transfer member is installed on a side of the heat sink (300) away from the heat dissipation hole (111) and abuts against the circuit board (200), and is used to transfer heat from the circuit board (200) to the heat sink (300).

2. The electric vehicle charger according to claim 1, characterized in that: The circuit board (200) is provided with a protruding inductor element (210), the heat sink (300) is provided with a receiving groove (320) for receiving the inductor element (210), and the heat transfer element is provided between a groove wall of the receiving groove (320) and the inductor element (210).

3. The electric vehicle charger according to claim 1, characterized in that: A power MOS tube (220) is also provided on the circuit board (200), a protrusion (330) corresponding to the power MOS tube (220) is provided on the heat sink (300), and the heat transfer element is provided between the protrusion (330) and the power MOS tube (220).

4. The electric vehicle charger according to any one of claims 1 to 3, characterized in that: The housing (100) comprises a top shell (110) and a bottom shell (120), the top shell (110) is detachably connected to the bottom shell (120), the heat dissipation holes (111) are arranged on the top shell (110), and the circuit board (200) is fixed to the bottom shell (120).

5. The electric vehicle charger according to claim 4, characterized in that: The bottom shell (120) is provided with a fixing column (121), the circuit board (200) is provided with a fixing hole (230), and a fixing member passes through the fixing hole (230) and is connected to the fixing column (121) so as to fix the circuit board (200) on the bottom shell (120); wherein: there are a plurality of fixing holes (230), and the plurality of fixing holes (230) are arranged at intervals along the outer contour of the circuit board (200).

6. The electric vehicle charger according to claim 4, characterized in that: One of the bottom shell (120) and the top shell (110) is provided with a latching protrusion (122), and the other of the bottom shell (120) and the top shell (110) is provided with a latching groove (112) that cooperates with the latching protrusion (122).

7. The electric vehicle charger according to claim 4, characterized in that: A convex ring portion (113) arranged around the heat dissipation hole (111) is provided on the inner side wall of the top shell (110) facing the bottom shell (120); the convex ring portion (113) is arranged around the heat dissipation fins (310), and the convex ring portion (113) is connected to the heat sink (300).

8. The electric vehicle charger according to claim 7, characterized in that: The heat sink (300) is provided with a mounting ear (340), the convex ring portion (113) is provided with a mounting column (1131), and a mounting piece passes through the mounting ear (340) and is connected to the mounting column (1131) so as to fix the heat sink (300) to the convex ring portion (113); wherein: there are a plurality of mounting ears (340), and along the length direction of the heat dissipation fin (310), the plurality of mounting ears (340) are respectively located on both sides of the heat dissipation fin (310), and the plurality of mounting ears (340) located on the same side are arranged at intervals.

9. The electric vehicle charger according to any one of claims 1 to 3, characterized in that: The electric vehicle charger also includes a glue potting component, which is filled in the accommodating cavity and wraps the components on the circuit board (200) and the heat transfer component.

10. The electric vehicle charger according to any one of claims 1 to 3, characterized in that: The housing (100) is provided with wire outlet holes on two opposite sides thereof; the circuit board (200) is provided with wire outlet terminals (400) which are arranged corresponding to the wire outlet holes and extend out of the wire outlet holes; the two wire outlet terminals (400) are respectively used to be connected to the photovoltaic panel and the electric vehicle.

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