A vehicle charger

Abstract

The application discloses a vehicle-mounted charger, and aims to provide a vehicle-mounted charger which is convenient to clean, and which comprises a charger body and a mounting seat, the top of the charger body is provided with a plurality of heat dissipation fins, the heat dissipation fins are uniformly distributed on the charger body, the heat dissipation fins are detachably connected with the charger body, the bottom of the charger body is provided with a self-locking structure, and the charger body is detachably connected with the mounting seat through the self-locking structure. The application has the advantages that the heat dissipation fins are convenient to clean, the charger surface is convenient to clean, the purpose of being convenient to clean is achieved, the charger body is convenient to mount and dismount, the mounting efficiency is improved, the charger body mounting is improved in firmness, the charger body is provided with a good damping effect, and the heat dissipation effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field related to vehicle-mounted chargers, and in particular to a vehicle-mounted charger. Background Art

[0002] An on-board charger (OBC) is a charger permanently installed on an electric vehicle. It has the ability to safely, quickly, and conveniently charge the power battery. Based on data provided by the battery management system (BMS), it dynamically adjusts the charging current and voltage parameters, executes the corresponding charging actions, and completes the charging process.

[0003] Chinese patent application number CN201520060806.X, published on June 17, 2015, discloses a distributed on-board charger, including a housing and a control circuit; the control circuit is disposed in the housing, and is characterized in that: the housing is composed of a box body and an end cover; a receiving cavity is provided inside the box body, an opening is provided on one side of the box body, and the end cover is sealed on the opening on the side of the box body; a heat dissipation surface is formed horizontally on the surface of one side of the box body, and the control circuit is applied to the inner side of the heat dissipation surface of the box body; heat dissipation fins are provided on the heat dissipation surface, and the heat dissipation fins are surrounded by a cavity in the middle of the heat dissipation surface, and a fan is provided in the cavity.

[0004] It can be seen from the above patent in combination with the accompanying drawings that the heat sink in the prior art is generally connected to the outer wall of the charger in a fixed manner. During the long-term use of the charger, dust and other debris will accumulate between adjacent heat sinks. When accumulated to a certain extent, it will seriously reduce the heat dissipation effect and affect the service life of the charger. Since the heat sink is fixedly connected to the charger casing and cannot be disassembled, and since the distance between adjacent heat sinks is small, it is very inconvenient to clean the debris between two adjacent heat sinks, which makes it difficult to clean the surface of the charger and inconvenient. Summary of the Invention

[0005] The present invention aims to overcome the disadvantage in the prior art that the surface of an on-board charger is inconvenient to clean, and provides an on-board charger that is easy to clean.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A vehicle-mounted charger includes a charger body and a mounting base. The top of the charger body is provided with a plurality of heat dissipation fins, which are evenly distributed on the charger body. The heat dissipation fins are detachably connected to the charger body. The bottom of the charger body is provided with a self-locking structure, and the charger body is detachably connected to the mounting base via the self-locking structure.

[0008] The top of the charger body is equipped with several heat dissipating fins, evenly distributed throughout the body. The fins are detachably connected to the body, and a self-locking structure is provided at the bottom of the body, detachably connecting the body to the mounting base via the self-locking structure. The detachable connection between the heat dissipating fins and the body facilitates cleaning of the fins and the surface of the charger, thus facilitating cleaning. Onboard chargers are typically mounted on a dedicated mounting beam under the hood of a vehicle. Installation typically utilizes a specialized mounting structure, which is complex and time-consuming, making repairs or replacements onboard chargers time-consuming and labor-intensive. Therefore, this solution also improves the mounting method of the onboard charger by replacing the mounting beam with a cylindrical or rectangular mounting base. During installation, the charger body simply needs to be placed on the mounting base, whereupon the self-locking structure allows the charger body to be self-locked with the mounting base, making it quick and convenient, and improving installation efficiency.

[0009] The top of the chassis is located in the heat dissipation zone, and the other end of the chassis is located outside the chassis and is in contact with the mounting base. In the initial state, the self-locking rod is in a vertical state on one side outside the cavity under the action of the counterweight, and the end of the self-locking rod inside the cavity contacts the top block; during installation, the operator places the charger body on the mounting seat, and the mounting seat overcomes the elastic effect to lift the top block, so that the top block moves upward to drive the end of the self-locking rod inside the cavity to rotate upward, and the end of the self-locking rod outside the cavity gradually approaches the mounting seat until the clamping surfaces on the two self-locking rods are respectively clamped on the left and right sides of the mounting seat, and finally the charger body is locked through the two clamping rods under the action of its own gravity. The self-locking rods are respectively clamped on the left and right side walls of the mounting base to realize the self-locking installation function of the charger body and the mounting base. Conversely, when the charger body needs to be disassembled, the operator only needs to lift the charger body upwards so that the top block is gradually separated from the mounting base. The top block gradually moves downward under the elastic resetting action, so that the self-locking rod rotates in the opposite direction under the action of the counterweight block, and finally the clamping surface gradually separates from the side wall of the mounting base, realizing the disassembly of the charger body and the mounting base, thereby making the installation and disassembly of the charger body convenient and quick, and helping to improve the installation efficiency.

[0010] Preferably, a locking ring is provided at the bottom of the charger body, and the locking ring is connected to the charger body for damping rotation. The inner circumferential surface of the locking ring is elliptical, and one end of the self-locking rod passes through the avoidance hole and is located in the locking ring, and the self-locking rod is in contact with the inner circumferential surface of the locking ring. During installation, the operator rotates the locking ring by a certain angle so that the two self-locking rods are located on the long axis of the inner ring of the locking ring; when the charger body is installed on the mounting seat, the clamping surfaces on the two self-locking rods are clamped on the left and right sides of the mounting seat respectively. The operator rotates the locking ring again so that the inner circumferential surface of the locking ring gradually approaches the self-locking rod until it conflicts with the surface of the self-locking rod, which limits the self-locking rod and helps prevent the clamping surface on the self-locking rod from detaching from the mounting seat during the bumpy process of the vehicle, thereby improving the firmness of the charger body installation. At the same time, the locking ring is connected to the charger body with damping rotation, which helps reduce the loosening of the locking ring during driving of the vehicle, further improving the firmness of the charger body installation.

[0011] Preferably, the mounting base is provided with a T-shaped slot on both the left and right sides, and a matching T-shaped slider is provided within the T-shaped slot. The T-shaped slider is slidably connected to the T-shaped slot up and down, and shock-absorbing springs are provided at both ends of the T-shaped slider. The T-shaped slider is elastically connected to the upper and lower ends of the T-shaped slot via the shock-absorbing springs at both ends, and the clamping surface on the counterweight is in contact with the sidewall of the T-shaped slider. Since the top block is elastically connected to the cavity, and the self-locking rod is clamped on the T-shaped slider via the clamping surface, and the T-shaped slider is elastically connected to the upper and lower ends of the T-shaped slot via the shock-absorbing springs at both ends, a good shock-absorbing effect is achieved on the charger body.

[0012] Preferably, one side of the counterweight is fixedly connected to the self-locking rod, and the clamping surface is located on the other side of the counterweight. The clamping surface is provided with a plurality of linearly evenly distributed protruding teeth, and the T-shaped slider is provided with a plurality of locking grooves that mesh with the plurality of protruding teeth. This design helps to increase the clamping force between the clamping surface and the T-shaped slider, thereby further improving the self-locking effect of the charger body.

[0013] Preferably, one side of the self-locking rod is located within the cavity and in contact with the top block, while the other side of the self-locking rod is partially located within the cavity and another portion thereof is located outside the cavity. The clamping surface and the other side of the self-locking rod form an obtuse angle α. The obtuse angle α increases the contact area between the clamping surface and the side wall of the T-shaped slider when the clamping surface is clamped on the T-shaped slider, thereby facilitating increased clamping force.

[0014] Preferably, support plates are provided at both ends of the heat sink fins, with the fins evenly distributed along the length of the support plates. Each end of the heat sink fin is fixedly connected to a corresponding support plate. The top of the charger body is provided with two slots that match the support plates at both ends of the heat sink fins. The support plates are detachably connected to the charger body through the slots. This design allows the operator to remove the fins simultaneously by simply removing the two support plates from the corresponding slots. This simplifies operation and facilitates cleaning of both the heat sink fins and the surface of the charger body.

[0015] As another preferred embodiment, support plates are provided at both ends of the heat sink fins, with multiple heat sink fins evenly distributed along the length of the support plates. Each end of the heat sink fin is pivotally connected to a corresponding support plate. The top of the charger body is provided with two slots that match the support plates at each end of the heat sink fins. The support plates are removably connected to the charger body via the slots. The pivotal connection of each end of the heat sink fin to the corresponding support plate facilitates wiping the surface of the heat sink fins, improving cleaning efficiency.

[0016] Preferably, one side of the support plate is connected to the heat sink fins, and a plurality of tension springs are provided on the other side of the support plate. The support plate is detachably connected to the side wall of the charger body via the tension springs. The tension of the tension springs ensures that the edges of the heat sink fins fully contact the top of the charger body, thereby improving heat dissipation.

[0017] Preferably, the charger body includes an upper housing and a lower housing. The top of the lower housing is detachably connected to the upper housing to form a sealed cavity. A circuit board is detachably mounted within the sealed cavity. The heat dissipation fins are located on the upper housing and outside the sealed cavity. The self-locking structure is located at the bottom of the lower housing. A cooling fan is detachably mounted on the upper housing and is located on the side of the heat dissipation fins. The cooling fan further improves heat dissipation.

[0018] The beneficial effects of the present invention are: it is easy to clean the heat dissipation fins and at the same time it is beneficial to clean the surface of the charger, thereby achieving the purpose of easy cleaning; the installation and disassembly of the charger body is convenient and quick, which is beneficial to improving the installation efficiency; it is beneficial to improving the firmness of the installation of the charger body; it has a good shock-absorbing effect on the charger body; and it is beneficial to improving the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure when the self-locking structure on the charger body is separated from the mounting base;

[0021] Figure 3 is a structural schematic view of the charger body connected with the mounting seat through the self-locking structure;

[0022] Figure 4 is a structural schematic view of the charger body locking the self-locking structure through the locking ring;

[0023] Figure 5 is Figure 1 a bottom view;

[0024] Figure 6 is Figure 2 an enlarged view of structure at A in

[0025] In the figure: 1. charger body, 2. mounting seat, 3. heat dissipation fin, 4. self-locking structure, 5. top block, 6. self-locking rod, 7. cavity, 8. through hole, 9. relief hole, 10. counterweight, 11. clamping surface, 12. locking ring, 13. T-shaped sliding groove, 14. T-shaped sliding block, 15. shock absorbing spring, 16. protruding tooth, 17. locking groove, 18. α angle, 19. support plate, 20. insertion slot, 21. tension spring, 22. upper shell, 23. lower shell, 24. sealed cavity. Embodiment

[0026] The application will be further described below in combination with the drawings and specific embodiments.

[0027] As Figure 1 , Figure 2 , Figure 3 and Figure 4 described in the embodiments, a vehicle-mounted charger includes a charger body 1 and a mounting seat 2. The top of the charger body 1 is provided with a plurality of heat dissipation fins 3, which are evenly distributed on the charger body 1 and are detachably connected with the charger body 1. The bottom of the charger body 1 is provided with a self-locking structure 4, and the charger body 1 is detachably connected with the mounting seat 2 through the self-locking structure 4.

[0028] As Figure 2 , Figure 3 and Figure 4As shown, the self-locking structure 4 includes a top block 5 and two self-locking rods 6. A cavity 7 is provided at the bottom of the charger body 1. The top of the cavity 7 is close to the heat dissipation fins 3, and the bottom of the cavity 7 is away from the heat dissipation fins 3. A through hole 8 matching the top block 5 is provided at the bottom center of the cavity 7. One end of the top block 5 is located in the cavity 7, and the other end of the top block 5 passes through the through hole 8 and is located outside the cavity 7 and in contact with the mounting base 2. The top block 5 is elastically connected to the cavity 7, and the two self-locking rods 6 are symmetrically distributed with the top block 5 as the center. The bottom of the cavity 7 is provided with two avoidance holes 9 that match the two self-locking rods 6 one by one. The self-locking rod 6 is L-shaped. The bending part of the self-locking rod 6 is rotatably connected to the cavity 7. One end of the self-locking rod 6 is in contact with the end of the top block 5 located in the cavity 7. The other end of the self-locking rod 6 is provided with a counterweight block 10. The other end of the self-locking rod 6 passes through the avoidance hole 9 and is fixedly connected to the counterweight block 10. The counterweight block 10 is located outside the cavity 7. The counterweight block 10 is provided with a clamping surface 11 that contacts the side wall of the mounting seat 2.

[0029] like Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, a locking ring 12 is provided at the bottom of the charger body 1, and the locking ring 12 is connected to the charger body 1 for damping rotation. The inner circumferential surface of the locking ring 12 is elliptical, and one end of the self-locking rod 6 passes through the avoidance hole 9 and is located in the locking ring 12, and the self-locking rod 6 is in contact with the inner circumferential surface of the locking ring 12.

[0030] like Figure 2 、 Figure 3 、 Figure 4 and Figure 6 As shown, T-shaped grooves 13 are provided on both sides of the mounting seat 2, and a T-shaped slider 14 matching it is provided in the T-shaped groove 13. The T-shaped slider 14 is connected to the T-shaped groove 13 for sliding up and down. Shock-absorbing springs 15 are provided at the upper and lower ends of the T-shaped slider 14. The T-shaped slider 14 is elastically connected to the upper and lower ends of the T-shaped groove 13 through the shock-absorbing springs 15 at both ends. The clamping surface 11 on the counterweight block 10 is in contact with the side wall of the T-shaped slider 14.

[0031] like Figure 2 、 Figure 3 、 Figure 4 and Figure 6 As shown, one side of the counterweight block 10 is fixedly connected to the self-locking rod 6, and the clamping surface 11 is located on the other side corresponding to the counterweight block 10. The clamping surface 11 is provided with a plurality of linearly evenly distributed protruding teeth 16, and the T-shaped slider 14 is provided with a plurality of locking grooves 17 that mesh with the plurality of protruding teeth 16 one by one.

[0032] like Figure 2 、 Figure 3 、 Figure 4 and Figure 6As shown, one side of the self-locking rod 6 is located in the cavity 7 and in contact with the top block 5, the other side of the self-locking rod 6 is partially located in the cavity 7, and the other part is located outside the cavity 7, and the clamping surface 11 and the other side of the self-locking rod 6 form an angle α 18, and the angle α 18 is an obtuse angle.

[0033] like Figure 1 As shown, support plates 19 are provided at both ends of the heat dissipation fins 3, and several heat dissipation fins 3 are evenly distributed along the length direction of the support plates 19. The two ends of the heat dissipation fins 3 are fixedly connected to the corresponding support plates 19 respectively. The top of the charger body 1 is provided with two slots 20 that match the support plates 19 at both ends of the heat dissipation fins 3 one by one. The support plates 19 are detachably connected to the charger body 1 through the slots 20.

[0034] Support plates 19 are provided at both ends of the heat dissipation fins 3. Several heat dissipation fins 3 are evenly distributed along the length direction of the support plates 19. The two ends of the heat dissipation fins 3 are rotatably connected to the corresponding support plates 19. The top of the charger body 1 is provided with two slots 20 that match the support plates 19 at both ends of the heat dissipation fins 3 one by one. The support plates 19 are detachably connected to the charger body 1 through the slots 20.

[0035] One side of the support plate 19 is connected to the heat dissipation fins 3 , and the other side of the support plate 19 is provided with a plurality of tension springs 21 . The support plate 19 is detachably connected to the side wall of the charger body 1 via the tension springs 21 .

[0036] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, the charger body 1 includes an upper shell 22 and a lower shell 23. The top of the lower shell 23 is detachably connected to the upper shell 22 and forms a sealed cavity 24. A circuit board is detachably installed in the sealed cavity 24. The heat dissipation fins 3 are located on the upper shell 22 and outside the sealed cavity 24. The self-locking structure 4 is located at the bottom of the lower shell 23. A cooling fan is detachably installed on the upper shell 22, and the cooling fan is located on the side of the heat dissipation fins 3.

[0037] In the initial state, the self-locking rod 6 is in a vertical state on its side outside the cavity 7 under the action of the counterweight 10, and the self-locking rod 6 on its side inside the cavity 7 contacts the top block 5; during installation, the operator first rotates the locking ring 12 to a certain angle so that the two self-locking rods 6 are located on the long axis of the inner ring of the locking ring 12; then the charger body 1 is placed on the mounting seat 2, and the mounting seat 2 overcomes the elastic effect to lift the top block 5, so that the top block 5 moves upward to drive the end of the self-locking rod 6 located in the cavity 7 to rotate upward, and the end of the self-locking rod 6 located outside the cavity 7 gradually approaches the mounting seat 2 until the clamping surfaces 11 on the two self-locking rods 6 are respectively clamped on the T-shaped sliders 14 on the left and right sides of the mounting seat 2, finally making the charger body 1 is clamped on the left and right sides of the mounting base 2 by two self-locking rods 6 under the action of its own gravity, realizing the self-locking installation function of the charger body 1 and the mounting base 2; finally, the operator rotates the locking ring 12 again, so that the inner circumferential surface of the locking ring 12 gradually approaches the self-locking rod 6 until it conflicts with the surface of the self-locking rod 6, which plays a limiting role on the self-locking rod 6, which is beneficial to prevent the clamping surface 11 on the self-locking rod 6 from separating from the mounting base 2 during the bumpy process of the vehicle, and is beneficial to improving the firmness of the installation of the charger body 1. At the same time, the locking ring 12 is connected to the charger body 1 with damping rotation, which is beneficial to reduce the loosening of the locking ring 12 during the driving of the vehicle, and further improves the firmness of the installation of the charger body 1.

[0038] On the contrary, when the charger body 1 needs to be disassembled, the operator rotates the locking ring 12 by a certain angle so that the inner circumference of the locking ring 12 gradually separates from the self-locking rod 6, and then lifts the charger body 1 upward, so that the top block 5 gradually separates from the mounting base 2. The top block 5 gradually moves downward under the elastic resetting action, so that the self-locking rod 6 rotates in the opposite direction under the action of the counterweight block 10, and finally the clamping surface 11 gradually separates from the side wall of the mounting base 2, thereby realizing the disassembly of the charger body 1 and the mounting base 2, thereby making the installation and disassembly of the charger body 1 convenient and quick, and helping to improve the installation efficiency.

[0039] When the charger body 1 is installed on the mounting base 2, the clamping surfaces 11 on the two self-locking rods 6 are respectively clamped on the left and right sides of the mounting base 2. Since the top block 5 is elastically connected to the cavity 7, the self-locking rod 6 is clamped on the T-shaped slider 14 through the clamping surface 11, and the T-shaped slider 14 is elastically connected to the upper and lower ends of the T-shaped slide groove 13 through the shock-absorbing springs 15 at both ends, which has a good shock-absorbing effect on the charger body 1.

[0040] When cleaning the charger body 1 , the operator only needs to remove the two support plates 19 from the corresponding slots 20 to remove several heat dissipating fins 3 at the same time. The operation is simple and is conducive to cleaning the heat dissipating fins 3 while also cleaning the surface of the charger body 1 .

[0041] The two ends of the heat dissipation fin 3 are rotatably connected to the corresponding support plates 19, which makes it easier to wipe the surface of the heat dissipation fin 3 and improves the cleaning effect.

Claims

1. A vehicle-mounted charger, characterized in that: The invention comprises a charger body (1) and a mounting base (2), wherein a plurality of heat dissipation fins (3) are provided on the top of the charger body (1), and the plurality of heat dissipation fins (3) are evenly distributed on the charger body (1), and the heat dissipation fins (3) are detachably connected to the charger body (1), and a self-locking structure (4) is provided on the bottom of the charger body (1), and the charger body (1) is detachably connected to the mounting base (2) via the self-locking structure (4); the self-locking structure (4) comprises a top block (5) and two self-locking rods (6), and a cavity (7) is provided on the bottom of the charger body (1), and the top of the cavity (7) is close to the heat dissipation fins (3), and the cavity ( The bottom of the cavity (7) is away from the heat dissipation fins (3), and a through hole (8) matching the top block (5) is provided at the bottom center of the cavity (7), one end of the top block (5) is located in the cavity (7), and the other end of the top block (5) passes through the through hole (8) and is located outside the cavity (7) and contacts the mounting seat (2), the top block (5) is elastically connected to the cavity (7), and the two self-locking rods (6) are symmetrically distributed with the top block (5) as the center, and the bottom of the cavity (7) is provided with two avoidance holes (9) matching the two self-locking rods (6) one by one, the shape of the self-locking rod (6) is L-shaped, and the bending part of the self-locking rod (6) is rotatably connected to the cavity (7). One end of the self-locking rod (6) contacts one end of the top block (5) located in the cavity (7), and the other end of the self-locking rod (6) is provided with a counterweight (10). The other end of the self-locking rod (6) passes through the avoidance hole (9) and is fixedly connected to the counterweight (10). The counterweight (10) is located outside the cavity (7). The counterweight (10) is provided with a clamping surface (11) that contacts the side wall of the mounting seat (2); a locking ring (12) is provided at the bottom of the charger body (1), and the locking ring (12) is connected to the charger body (1) in a damping rotation manner. The inner circumferential surface of the locking ring (12) is elliptical. The self-locking rod (6) passes through the avoidance hole ( One end of the self-locking rod (9) is located in the locking ring (12), and the self-locking rod (6) contacts the inner circumference of the locking ring (12); during installation, the operator rotates the locking ring (12) by a certain angle so that the two self-locking rods (6) are located on the long axis of the inner ring of the locking ring (12); when the charger body (1) is installed on the mounting seat (2), the clamping surfaces (11) on the two self-locking rods (6) are clamped on the left and right sides of the mounting seat (2) respectively, and the operator rotates the locking ring (12) again so that the inner circumference of the locking ring (12) gradually approaches the self-locking rod (6) until it conflicts with the surface of the self-locking rod (6), thereby limiting the self-locking rod (6).

2. The vehicle-mounted charger according to claim 1, wherein: The left and right sides of the mounting seat (2) are both provided with T-shaped grooves (13), and a T-shaped slider (14) matching the T-shaped groove (13) is provided in the T-shaped groove (13), and the T-shaped slider (14) is connected to the T-shaped groove (13) by sliding up and down. Shock-absorbing springs (15) are provided at the upper and lower ends of the T-shaped slider (14), and the T-shaped slider (14) is elastically connected to the upper and lower ends of the T-shaped groove (13) through the shock-absorbing springs (15) at both ends. The clamping surface (11) on the counterweight (10) contacts the side wall of the T-shaped slider (14).

3. The vehicle-mounted charger according to claim 2, wherein: One side of the counterweight (10) is fixedly connected to the self-locking rod (6), and the clamping surface (11) is located on the other side corresponding to the counterweight (10). The clamping surface (11) is provided with a plurality of linearly evenly distributed protruding teeth (16), and the T-shaped slider (14) is provided with a plurality of locking grooves (17) that mesh with the plurality of protruding teeth (16) one by one.

4. A vehicle-mounted charger according to claim 1, 2 or 3, characterized in that: One side of the self-locking rod (6) is located in the cavity (7) and in contact with the top block (5), the other side of the self-locking rod (6) is partially located in the cavity (7), and another part of it is located outside the cavity (7), and the clamping surface (11) and the other side of the self-locking rod (6) form an α angle (18), and the α angle (18) is an obtuse angle.

5. The vehicle-mounted charger according to claim 1, wherein: Support plates (19) are provided at both ends of the heat dissipation fins (3), and a plurality of heat dissipation fins (3) are evenly distributed along the length direction of the support plates (19). The two ends of the heat dissipation fins (3) are fixedly connected to the corresponding support plates (19), and the top of the charger body (1) is provided with two slots (20) that match the support plates (19) at the two ends of the heat dissipation fins (3) one by one. The support plates (19) are detachably connected to the charger body (1) through the slots (20).

6. The vehicle-mounted charger according to claim 1, wherein: Support plates (19) are provided at both ends of the heat dissipation fins (3), and a plurality of heat dissipation fins (3) are evenly distributed along the length direction of the support plates (19). The two ends of the heat dissipation fins (3) are rotatably connected to the corresponding support plates (19), and the top of the charger body (1) is provided with two slots (20) that match the support plates (19) at both ends of the heat dissipation fins (3). The support plates (19) are detachably connected to the charger body (1) through the slots (20).

7. The vehicle-mounted charger according to claim 5 or 6, characterized in that: One side of the support plate (19) is connected to the heat dissipation fin (3), and the other side of the support plate (19) corresponding to the support plate (19) is provided with a plurality of tension springs (21). The support plate (19) is detachably connected to the side wall of the charger body (1) via the tension springs (21).

8. The vehicle-mounted charger according to claim 1, 2, 3, 5 or 6, characterized in that: The charger body (1) comprises an upper shell (22) and a lower shell (23), the top of the lower shell (23) is detachably connected to the upper shell (22) and forms a sealed cavity (24), a circuit board is detachably mounted in the sealed cavity (24), the heat dissipation fins (3) are located on the upper shell (22) and outside the sealed cavity (24), the self-locking structure (4) is located at the bottom of the lower shell (23), a cooling fan is detachably mounted on the upper shell (22), and the cooling fan is located on the side of the heat dissipation fins (3).

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