Electric vehicle charger

Abstract

The utility model 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 utility model relates to the technical field of electric vehicles, in particular to an electric vehicle charger. Background Art

[0002] Solar chargers primarily convert sunlight into electricity. Light absorption generates electron-hole pairs, creating a potential difference. When connected to a step-up circuit, a stable voltage output is generated to charge electric vehicles. However, due to both direct solar radiation and the load temperature rise of power components, solar chargers can overheat, triggering charger protection and intermittent charging. This reduces charging efficiency, prolongs charging time, and degrades the user experience. Utility Model Content

[0003] The purpose of the utility model 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 charging, which is beneficial to improving charging efficiency, shortening charging time, and improving user experience.

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

[0005] The utility model discloses an electric vehicle charger, comprising: a shell, the shell having a receiving cavity, the receiving cavity having a heat dissipation hole; a circuit board, the circuit board being mounted on the shell, the circuit board being 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 being mounted in the shell, the radiator having heat dissipation fins extending into the heat dissipation hole; a heat transfer member, the heat transfer member being mounted on a side of the radiator away from the heat dissipation hole and abutting against the circuit board, the heat transfer member being used to transfer heat from 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, 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 that cooperates with the latching protrusion.

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

[0012] In some more specific embodiments, the radiator is provided with a mounting ear, the convex ring portion is provided with a mounting post, and the mounting piece passes through the mounting ear and is connected to the mounting post to fix the radiator 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 spaced apart.

[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, wire outlet holes are provided on two opposite sides of the shell; 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] The beneficial effects of the present invention are as follows: 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 conduct 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 will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

[0021] Figure 5 This is a schematic structural diagram of the top shell of an embodiment of the utility model;

[0022] Figure 6 It is a structural schematic diagram of the bottom shell of an embodiment of the present utility model.

[0023] Reference numerals:

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

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

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

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0028] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

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

[0030] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0031] The utility model discloses an electric vehicle charger, referring to Figure 1-Figure 3 As shown, the electric vehicle charger of this embodiment includes a housing 100, a circuit board 200, a radiator 300 and a heat transfer element (not shown in the figure). The housing 100 has a accommodating cavity, and the accommodating cavity has a heat dissipation hole 111. The circuit board 200 is installed in the housing 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 housing 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. 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 dissipate the heat of the radiator 300 into 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.

[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, a protruding inductor element 210 is provided on the circuit board 200, and a receiving groove 320 for accommodating the inductor element 210 is provided on the heat sink 300. A heat transfer element is provided between the groove wall of the receiving groove 320 and the inductor element 210. It is understood that in actual operation, the inductor element 210 is a large component on the circuit board 200 that generates a lot of heat. The receiving groove 320 provided on the heat sink 300 to accommodate the inductor element 210, and the heat transfer element sandwiched between the groove wall of the receiving groove 320 and the inductor element 210, 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 improving 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 transistor 220, and the heat sink 300 is provided with a protrusion 330 corresponding to the power MOS transistor 220, with a heat transfer element provided between the protrusion 330 and the power MOS transistor 220. It is understandable that in actual operation, the inductor element 210 is a relatively small component on the circuit board 200 that generates more heat. The heat sink 300 is provided with a protrusion 330 that abuts against the power MOS transistor 220, and the heat transfer element is sandwiched between the protrusion 330 and the power MOS transistor 220. This can increase the contact area between the power MOS transistor 220 and the heat sink 300, allowing the heat generated by the power MOS transistor 220 to be transferred to the heat sink 300 more quickly, thereby improving the heat dissipation effect of the electric vehicle charger.

[0035] Of course, it should be noted 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 is understood that in actual operation, the radiator 300 is installed on the top housing 110, and then the circuit board 200 is fixed to the bottom housing 120 to complete the assembly of the electric vehicle charger. This structure of splitting the housing 100 into two parts facilitates the assembly of the entire electric vehicle charger and 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 arranged with the slot 114. The plug-in connection between the slot 114 and the plug-in edge 123 is helpful in improving the connection stability between the top shell 110 and the bottom shell 120, thereby ensuring the reliability of the electric vehicle charger, ensuring the sealing of the connection between the bottom shell 120 and the bottom shell 120, and preventing external foreign matter from entering the interior of the housing 100, thereby reducing the probability of short circuit 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 sealing of the connection 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, the bottom shell 120 is provided with a fixing column 121, and the circuit board 200 is provided with a fixing hole 230. The fixing member passes through the fixing hole 230 and is connected to the fixing column 121 to fix the circuit board 200 to the bottom shell 120. It is understood that during 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. Finally, the fixing member is passed through the fixing hole 230 and connected to the fixing column 121 to fix the circuit board 200 to the bottom shell 120. In this way, the circuit board 200 can be accurately and stably fixed to 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, which are spaced apart along the outer contour of the circuit board 200. The connection between the circuit board 200 and the bottom case 120 is achieved through 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, the bottom shell 120 is provided with a latching protrusion 122, and the top shell 110 is provided with a latching slot 112 that mates with the latching protrusion 122. It will be appreciated that the bottom shell 120 and the top shell 110 are connected by the latching protrusion 122 and the latching slot 112, eliminating the need for fasteners such as screws or pins. This facilitates assembly of the housing 100 and improves the production efficiency of the electric vehicle charger. Optionally, the latching slot 112 has a protrusion 1121 on its wall, and the latching protrusion 122 has a groove 1221 that mates with the protrusion 1121. During insertion of the latching protrusion 122 into the slot 112, the protrusion 1121 snaps into the groove 1221, enhancing the connection strength between the slot 112 and the latching protrusion 122, thereby improving the connection stability between the top shell 110 and the bottom shell 120. Optionally, there are multiple latching protrusions 122 and multiple latching slots 112, and they are spaced apart along the outer contours of the bottom shell 120 and the top shell 110. This can further improve the connection stability between the top shell 110 and the bottom shell 120 . 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 raised ring portion 113 is provided on the inner side wall of the top case 110 facing the bottom case 120, surrounding the heat dissipation holes 111. The raised ring portion 113 is disposed around the heat dissipation fins 310 and is connected to the heat sink 300. It will be understood that the connection between the raised ring portion 113 and the heat sink 300 ensures that the heat sink 300 is stably installed inside the housing 100 and that the heat dissipation fins 310 are stably fitted into the heat dissipation holes 111, thereby facilitating heat dissipation efficiency of the heat dissipation fins 310.

[0043] refer to Figure 4 and Figure 5 As shown, the radiator 300 is provided with a mounting ear 340, and the convex ring portion 113 is provided with a mounting post 1131. The mounting piece passes through the mounting ear 340 and is connected to the mounting post 1131 to fix the radiator 300 to the convex ring portion 113. It is understood that during the actual assembly process, the radiator 300 is inserted into the middle of the convex ring portion 113 so that the heat dissipation fins 310 are inserted into the heat dissipation holes 111, and it is ensured that the mounting post 1131 and the mounting ear 340 are arranged correspondingly. Then, the mounting piece is passed through the mounting ear 340 and is connected to the mounting post 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 piece can be a screw or a pin.

[0044] Optionally, there are multiple mounting ears 340, which are located on both sides of the heat sink 310 along the length direction of the heat sink 310, and the multiple mounting ears 340 on the same side are spaced apart. This can further improve the connection stability between the heat sink 300 and the top case 110.

[0045] refer to Figure 1-Figure 3 As shown, the housing 100 has two opposing sides with wire holes. The circuit board 200 is provided with wire terminals 400 that correspond to and extend from the wire holes. These two wire terminals 400 are used to connect to the photovoltaic panel and the electric vehicle, respectively. It is understood that the additional wire terminals 400 ensure a stable connection between the circuit board 200 and the photovoltaic panel and the electric vehicle, and prevent damage to the wires caused by friction with the housing 100, thereby improving the safety of the electric vehicle charger.

[0046] Optionally, the electric vehicle charger also includes a potting element that fills the cavity and encapsulates the components and heat transfer element on the circuit board 200. This effectively protects the circuit board 200 and reduces the risk of damage to the circuit board 200 when the electric vehicle charger is subjected to significant external forces. Furthermore, to ensure efficient heat dissipation, the potting element may utilize a colloid with a high thermal conductivity.

[0047] Throughout this specification, references to "some embodiments," "other embodiments," and the like indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0048] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection 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), the circuit board (200) being used to achieve a connection between a photovoltaic panel and an electric vehicle, so that the photovoltaic panel charges 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 radiator (300) facing 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 radiator (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 provided 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) to fix the circuit board (200) on the bottom shell (120); wherein: 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).

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 locking protrusion (122), and the other of the bottom shell (120) and the top shell (110) is provided with a locking groove (112) that cooperates with the locking protrusion (122).

7. The electric vehicle charger according to claim 4, characterized in that: A convex ring portion (113) is provided on the inner side wall of the top shell (110) facing the bottom shell (120) and is arranged around the heat dissipation hole (111). The convex ring portion (113) is arranged around the heat dissipation fins (310), and the convex ring portion (113) is connected to the radiator (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 post (1131), and a mounting piece passes through the mounting ear (340) and is connected to the mounting post (1131) to fix the heat sink (300) to the convex ring portion (113); wherein: 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) 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 further comprises 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: Wire outlet holes are provided on two opposite sides of the housing (100); and the circuit board (200) is provided with wire outlet terminals (400) corresponding to the wire outlet holes and extending out of the wire outlet holes. The two wire outlet terminals (400) are respectively used to connect to the photovoltaic panel and the electric vehicle.

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