Charging device

Abstract

This utility model discloses a charging device, relating to the field of electronic equipment technology. The charging device includes a housing, a mounting bracket, a circuit board assembly, and a cooling fan. The housing has an air inlet and an air outlet. The mounting bracket is disposed within the housing. The circuit board assembly is disposed within the housing and located on the mounting bracket, forming a first air duct between the circuit board assembly and the mounting bracket, and a second air duct between the circuit board assembly and the inner wall of the housing. The circuit board assembly has a ventilation channel connecting the first and second air ducts. The air inlet communicates with the first and / or second air ducts, and the air outlet communicates with the first and / or second air ducts. The circuit board assembly includes a first circuit board and a second circuit board disposed opposite to each other, with the first circuit board, the second circuit board, and the mounting bracket collectively defining the first air duct. The cooling fan is disposed within the housing. This utility model solves the problem of unstable charging rates caused by poor heat dissipation efficiency in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of electronic equipment technology, and in particular to a charging device. Background Technology

[0002] The heat generated during the operation of a charging device can affect the lifespan of electronic devices and pose safety hazards. Therefore, efficient heat dissipation has become crucial for improving the overall performance of electronic devices. Traditional electronic devices generally rely on passive cooling solutions, such as attaching thermally conductive silicone, graphene sheets, or metal heat sinks to key heat-generating components. The heat generated by the key heat-generating components is transferred to the heat dissipation material, and then transferred to the housing through the contact between the heat dissipation material and the housing. Finally, the heat is dissipated through natural convection between the housing surface and the air. This cooling mode is inefficient, has high thermal resistance, and is difficult to cope with the instantaneous high heat load generated by continuous high current operation, thus affecting charging efficiency. Utility Model Content

[0003] The main purpose of this invention is to provide a charging device that aims to solve the problem of unstable charging rate caused by poor heat dissipation efficiency in the prior art.

[0004] To achieve the above objectives, the present invention proposes a charging device comprising a housing having an air inlet and an air outlet. Mounting bracket, disposed within the housing; A circuit board assembly is disposed within the housing and located on the mounting bracket. A first air duct is formed between the circuit board assembly and the mounting bracket, and a second air duct is formed between the circuit board assembly and the inner wall of the housing. The circuit board assembly is provided with an air passage that connects the first air duct and the second air duct. An air inlet is connected to the first air duct and / or the second air duct, and an air outlet is connected to the first air duct and / or the second air duct. The circuit board assembly includes a first circuit board and a second circuit board, which are disposed opposite to each other. At least part of the mounting bracket is disposed between the first circuit board and the second circuit board, and the first circuit board, the second circuit board and the mounting bracket together define the first air duct. A cooling fan, located inside the housing, drives air to flow from the air inlet into the first and second air ducts, and out through the air outlet.

[0005] In one embodiment, the circuit board assembly includes a first circuit board and a second circuit board, which are disposed opposite to each other. At least part of the mounting bracket is disposed between the first circuit board and the second circuit board, and the first circuit board, the second circuit board, the housing, and the mounting bracket together define the first air duct.

[0006] In one embodiment, the first circuit board is spaced apart from the inner wall of the housing to define a first sub-air duct, and the air passage includes a first groove on the first circuit board, the first groove connecting the first sub-air duct and the first air duct. And / or, the second circuit board is spaced apart from the inner wall of the housing and defines a second sub-air duct, the air passage including a second groove on the second circuit board, the second groove connecting the second sub-air duct and the first air duct.

[0007] In one embodiment, the mounting bracket is provided with a battery, the battery is electrically connected to the circuit board assembly, and there is a first heat dissipation gap between the battery and the inner wall of the housing, and the first sub-air duct and / or the second sub-air duct communicate with the first heat dissipation gap.

[0008] In one embodiment, at least a portion of the mounting bracket has a second heat dissipation gap between it and the housing, and at least a portion of the second heat dissipation gap communicates with the first air duct and / or the second air duct.

[0009] In one embodiment, a telescopic cable module is provided inside the housing, at least a portion of the telescopic cable module is located inside the first air duct, and the charging connector on the telescopic cable module extends out of the housing and is telescopically movable relative to the housing; And / or, the charging connector and the air inlet are located on different sides of the housing.

[0010] In one embodiment, a third air duct is defined between one side of the mounting bracket and the housing, the cooling fan is disposed within the third air duct, and the third air duct connects the first air duct and / or the second air duct.

[0011] In one embodiment, the distance between the cooling fan and the air inlet is greater than the distance between the fan and the air outlet.

[0012] In one embodiment, the housing includes an outer shell and a cover, the outer shell having a receiving cavity open at one end, the cover covering the outer shell and closing the receiving cavity, the air inlet being disposed on the outer shell, and the air outlet being disposed on the cover.

[0013] In one embodiment, a faceplate is provided on one side of the housing, a display component is provided between the faceplate and the housing, the display component is electrically connected to the circuit board, and at least a portion of the faceplate facing the display component is configured as a light-transmitting element; And / or, the faceplate, the air inlet, and the air outlet are located on different sides of the housing.

[0014] In one embodiment, the circuit board further includes a third circuit board, which is disposed in the first air duct and fixedly connected to the second circuit board and the mounting bracket respectively. The third circuit board is provided with a voltage sampling terminal and an internal resistance detection circuit. Both the voltage sampling terminal and the internal resistance detection circuit are electrically connected to the battery for collecting the internal resistance and voltage data of the battery and transmitting the data to the display component to display the battery's charge status.

[0015] In one embodiment, a thermally conductive substrate is further provided inside the housing. The thermally conductive substrate is disposed between the mounting bracket and the inner wall of the housing. One side of the thermally conductive substrate is in contact with the inner wall of the housing, and the other side abuts against the battery.

[0016] In one embodiment, the inner wall of the housing at the location of the air inlet and / or the air outlet is further provided with a mounting groove, and a protective net is provided in the mounting groove.

[0017] The technical solution of this utility model involves a circuit board assembly mounted on a mounting frame, forming a first air duct between the circuit board assembly and the mounting frame, and a second air duct between the circuit board assembly and the inner wall of the housing. An air passage connecting the first and second air ducts is provided on the circuit board assembly. Combined with the placement of an air inlet, air outlet, and cooling fan, airflow can circulate between the first and second air ducts. Since most of the electronic components of the charging device are located on the circuit board assembly, which is the main heat source of the charging device, the first and second air ducts allow for simultaneous heat dissipation on both sides of the circuit board assembly, increasing the heat dissipation area and further improving heat dissipation efficiency. This effectively copes with the instantaneous high heat load generated by continuous high-current operation, effectively avoiding the problem of reduced charging power and efficiency caused by the charging device's derating protection triggered by excessive temperature. This ensures that the charging device can stably output rated power under continuous high-current operation, improving charging efficiency and user experience. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 A schematic diagram of one embodiment of the electronic device provided by this utility model; Figure 2 for Figure 1 A schematic diagram of the vertical cross-sectional structure in the middle; Figure 3 for Figure 1 A schematic diagram of the transverse cross-sectional structure in the middle; Figure 4 for Figure 1 Partial structural explosion diagram; Figure 5 for Figure 1 Partial structural diagram; Figure 6 for Figure 5 A schematic diagram of the explosion structure.

[0020] Explanation of icon numbers: 1. Housing; 1a. Air inlet; 1b. Air outlet; 11. Outer shell; 11a. Receiving cavity; 12. Shell cover; 12a. Thermally conductive substrate; 13. Display assembly; 14. Front cover; 2. Mounting bracket; 3. Circuit board assembly; 31. First circuit board; 32. Second circuit board; 33. Third circuit board; 41. First air duct; 42. Second air duct; 42a. First sub-air duct; 42b. Second sub-air duct; 43. Third air duct; 44. Air passage; 44a. First groove; 44b. Second groove; 45. First heat dissipation gap; 46. Second heat dissipation gap; 5. Cooling fan; 6. Battery; 7. Telescopic line module.

[0021] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0023] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0024] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0025] This utility model proposes a charging device.

[0026] Please see Figures 1 to 3 In one embodiment of this utility model, the charging device includes a housing 1, a mounting bracket 2, a circuit board assembly 3, and a cooling fan 5. The housing 1 has an air inlet 1a and an air outlet 1b. The mounting bracket 2 is disposed inside the housing 1. The circuit board assembly 3 is disposed inside the housing 1 and located on the mounting bracket 2. A first air duct 41 is formed between the circuit board assembly 3 and the mounting bracket 2, and a second air duct 42 is formed between the circuit board assembly 3 and the inner wall of the housing 1. The circuit board assembly 3 is provided with a ventilation channel 44, which connects the first air duct 41 and the second air duct 42. The air inlet 1a is connected to the first air duct 41 and / or the second air duct 42, and the air outlet 1b is connected to the first air duct 41 and / or the second air duct 42. The cooling fan 5 is disposed inside the housing 1 and is used to drive air to flow from the air inlet 1a into the first air duct 41 and the second air duct 42, and out through the air outlet 1b.

[0027] It should be noted that in this embodiment, the specific shape of the housing 1 is not limited. For example, the overall shape of the housing 1 can be set as a cuboid, a cylinder or other regular or irregular shape, as long as it can accommodate the mounting bracket 2, the circuit board assembly 3 and the cooling fan 5 inside. No specific limitation is made here.

[0028] In this embodiment, the cooling fan 5 can be located at any position inside the housing 1. For example, the cooling fan 5 can be located in the first air duct 41, or in the second air duct 42, or partially located in the first air duct 41 and partially located in the second air duct 42, or only located at the air outlet 1b. As long as the cooling fan 5 can guide the airflow from the air inlet 1a into the first air duct 41 and the second air duct 42 and then discharge it from the air outlet 1b when it is working, the type, specific structure, and air outlet orientation of the cooling fan 5 can be adapted and set according to actual needs.

[0029] It should be noted that the charging device is used to provide power to external electronic devices. The circuit board assembly 3 is equipped with major electronic components such as charging management circuit, voltage conversion circuit, and control circuit. When the charging device is working, the power introduced by the external power supply through the power connector is converted into voltage and output by the circuit board assembly 3. Since most of the heat-generating electronic components are concentrated on the circuit board assembly 3, the circuit board assembly 3 is the main heat source of the charging device. The heat generated by the circuit board assembly 3 during operation directly affects the overall temperature rise of the charging device, thereby affecting the charging efficiency.

[0030] It is understood that the circuit board assembly 3 is mounted on the mounting bracket 2, and the mounting bracket 2 is fixed within the receiving cavity 11a of the housing 1. The first air duct 41 is formed between the circuit board assembly 3 and the mounting bracket 2. For example, the mounting bracket 2 may have a groove on the side facing the circuit board assembly 3, and the circuit board assembly 3 covers the mounting bracket 2. The groove and the circuit board assembly 3 together form the first air duct 41. Alternatively, the mounting bracket 2 may have multiple spaced support ribs protruding on the side facing the circuit board assembly 3, and the circuit board assembly 3 is mounted on the support ribs. The gap between the circuit board assembly 3 and the mounting bracket 2 constitutes the first air duct 41. In this way, the first air duct 41 is located on the lower side of the circuit board assembly 3, and the second air duct 42 is located on the upper side of the circuit board assembly 3. The upper and lower surfaces of the circuit board assembly 3 are in contact with the airflow, increasing the heat exchange area.

[0031] It is understood that the circuit board assembly 3 is provided with an air passage 44, which penetrates the upper and lower surfaces of the circuit board assembly 3. Optionally, the air passage 44 can be a through hole formed on the circuit board assembly 3 or a notch formed on the edge of the circuit board assembly 3. In this embodiment, the air passage 44 connects the first air duct 41 and the second air duct 42, so that the airflow in the first air duct 41 and the second air duct 42 can circulate with each other, avoiding local heat accumulation when the airflow in one air duct is blocked.

[0032] In this embodiment, the air inlet 1a is connected to the first air duct 41 and / or the second air duct 42. It is understood that the air inlet 1a may be connected only to the first air duct 41, only to the second air duct 42, or simultaneously to both air ducts 41 and 42. In this embodiment, the air outlet 1b is connected to the first air duct 41 and / or the second air duct 42. It is understood that the air outlet 1b may be connected only to the first air duct 41, only to the second air duct 42, or simultaneously to both air ducts 41 and 42. It is understood that regardless of which air duct the air inlet 1a and air outlet 1b are connected to, under the drive of the cooling fan 5, the airflow can flow between the first air duct 41 and the second air duct 42, passing over the upper and lower surfaces of the circuit board assembly 3.

[0033] For example, the air inlet 1a can be opened on the side wall of the housing 1, and the air outlet 1b can be opened on the top wall of the housing 1. When the cooling fan 5 is working, the cold air outside the housing 1 enters the housing 1 through the air inlet 1a and flows into the first air duct 41 and / or the second air duct 42. When the airflow passes through the lower surface and / or upper surface of the circuit board assembly 3, it carries away the heat generated by the operation of the circuit board assembly 3. The heat-exchanged hot air is discharged to the outside of the housing 1 through the air outlet 1b, thereby realizing the air cooling of the circuit board assembly 3.

[0034] In this embodiment, the first air duct 41 and the second air duct 42 are located on both sides of the circuit board assembly 3, so that both the upper and lower surfaces of the circuit board assembly 3 can come into contact with the airflow. Compared with the solution of only dissipating heat on one side of the circuit board assembly 3, the heat exchange area between the circuit board assembly 3 and the airflow is further increased, effectively improving the heat dissipation efficiency and effectively reducing the temperature of the circuit board assembly 3 during operation.

[0035] Further, see Figure 5 and Figure 6 The circuit board assembly 3 includes a first circuit board 31 and a second circuit board 32, which are disposed opposite to each other. At least part of the mounting bracket 2 is disposed between the first circuit board 31 and the second circuit board 32. The first circuit board 31, the second circuit board 32 and the mounting bracket 2 together define the first air duct 41.

[0036] Optionally, in this embodiment, the first circuit board 31 may be disposed on the upper side of the mounting bracket 2, and the second circuit board 32 may be disposed on the lower side of the mounting bracket 2; or, the first circuit board 31 may be disposed on the lower side of the mounting bracket 2, and the second circuit board 32 may be disposed on the upper side of the mounting bracket 2.

[0037] In this embodiment, at least a portion of the mounting bracket 2 is located between the first circuit board 31 and the second circuit board 32. The mounting bracket 2 may be entirely or partially located between the first circuit board 31 and the second circuit board 32. Exemplarily, the mounting bracket 2 provides a mounting location, where the first circuit board 31 and the second circuit board 32 are disposed on the mounting location of the mounting bracket 2 and spaced apart. The first circuit board 31 has electronic components, and the second circuit board 32 has electronic components on one side, which are positioned opposite each other. The mounting location may be located within the mounting bracket or at the upper or lower ends of the mounting bracket, as long as the first circuit board 31 and the second circuit board 32 are fixed and there is a gap between them; no specific limitation is made here.

[0038] In this embodiment, the first air duct 41 is located between the first circuit board 31 and the second circuit board 32, so that the airflow in the first air duct 41 can flow through the space between the first circuit board 31 and the second circuit board 32 at the same time, and carry away the heat generated by the two circuit boards when they are working. At the same time, by setting the first air duct 41 in the space between the first circuit board 31 and the second circuit board 32, the height space inside the housing 1 can be fully utilized, and there is no need to add an additional air duct component, which is conducive to the miniaturization design of the charging device.

[0039] In one implementation, see Figure 2 , Figure 5 and Figure 6 The circuit board assembly 3 includes a first circuit board 31 and a second circuit board 32, which are disposed opposite to each other. At least part of the mounting bracket 2 is disposed between the first circuit board 31 and the second circuit board 32. The first circuit board 31, the second circuit board 32, the housing 1 and the mounting bracket 2 together define the first air duct 41.

[0040] In this embodiment, the difference from the previous embodiment is that the first air duct 41 is formed by the first circuit board 31, the second circuit board 32, the mounting bracket 2, and the inner wall of the housing 1. Exemplarily, a gap may be left between the mounting bracket 2 and the side wall of the housing 1, and this gap communicates with the space enclosed by the first circuit board 31, the second circuit board 32, and the mounting bracket 2, and together they constitute the first air duct 41.

[0041] It is understandable that the first circuit board 31, the second circuit board 32, the mounting bracket 2, and the inner wall of the housing 1 together form the first air duct 41. The volume of the first air duct 41 is further increased compared to the method that is only limited by the circuit board and the mounting bracket 2, so that the airflow is reduced when it flows in the air duct, and the airflow that can be accommodated in the air duct is increased, which is conducive to improving the working efficiency of the cooling fan 5. At the same time, the increased air duct volume makes the arrangement of electronic components more flexible.

[0042] In one implementation, see Figure 2 The first circuit board 31 is spaced apart from the inner wall of the housing 1 and defines a first sub-air duct 42a. The air passage 44 includes a first groove 44a provided on the first circuit board 31, and the first groove 44a connects the first sub-air duct 42a and the first air duct 41; and / or, the second circuit board 32 is spaced apart from the inner wall of the housing 1 and defines a second sub-air duct 42b. The air passage 44 includes a second groove 44b provided on the second circuit board 32, and the second groove 44b connects the second sub-air duct 42b and the first air duct 41.

[0043] It should be noted that the second air duct 42 may include only the first sub-air duct 42a, may include only the second sub-air duct 42b, or may include both the first sub-air duct 42a and the second sub-air duct 42b. No specific restrictions are imposed here.

[0044] It should be noted that the first groove 44a can be a through groove formed on the first circuit board 31 or a notch formed on the edge of the first circuit board 31; the second groove 44b can be a through groove formed on the second circuit board 32 or a notch formed on the edge of the second circuit board 32; as long as airflow can be achieved between the first air duct 41 and the sub-air duct, no specific limitation is made here.

[0045] This embodiment utilizes the space between the inner wall of the housing 1 and the circuit board to fully utilize the space between the circuit board 31 and the inner wall of the housing 1, thereby increasing the heat dissipation area of ​​the air duct and the airflow path without increasing the overall volume of the charging device. In one implementation, see Figure 2 and Figure 4 The mounting bracket 2 is provided with a battery 6, which is electrically connected to the circuit board assembly 3. A first heat dissipation gap 45 is provided between the battery 6 and the inner wall of the housing 1. The first sub-air duct 42a and / or the second sub-air duct 42b are connected to the first heat dissipation gap 45.

[0046] It is understandable that the first sub-air duct 42a and / or the second sub-air duct 42b are connected to the first heat dissipation gap 45, meaning that the first heat dissipation gap 45 can be connected only to the first sub-air duct 42a, only to the second sub-air duct 42b, or simultaneously to both the first sub-air duct 42a and the second sub-air duct 42b.

[0047] In this embodiment, the first heat dissipation gap 45 and the first sub-air duct 42a, as well as the second heat dissipation gap 46 and the second sub-air duct 42b, can be connected through through holes or notches on the mounting bracket 2 or through the gap between the mounting bracket 2 and the housing 1. When the cooling fan 5 is working, the airflow flows in from the air inlet 1a, passes through the first sub-air duct 42a and / or the second sub-air duct 42b, and the connecting path on the mounting bracket 2 into the corresponding mounting heat dissipation gap, flows over the surface of the battery 6 to dissipate heat from the battery 6, and finally is discharged from the air outlet 1b. In this way, the heat on the surface of the battery 6 is carried away by the airflow, realizing the air cooling of the battery 6.

[0048] In one implementation, see Figure 3 At least a portion of the mounting bracket 2 and the housing 1 have a second heat dissipation gap 46, and at least a portion of the second heat dissipation gap 46 communicates with the first air duct 41 and / or the second air duct 42.

[0049] It should be noted that the second heat dissipation gap 46 can be the gap between the periphery of the mounting bracket 2 and the housing 1, the gap between the bottom of the mounting bracket 2 and the housing 1, or the gap between the top of the mounting bracket 2 and the housing 1. This application does not limit this, as long as at least a part of the mounting bracket 2 has a gap between it and the housing 1 that allows airflow.

[0050] It is understandable that by setting a second heat dissipation gap 46 between the mounting bracket 2 and the housing 1, an airflow channel is formed between the mounting bracket 2 and the housing 1. The airflow can circulate around or partially around the mounting bracket 2, carrying away the heat generated by the circuit board assembly 3 and battery 6 carried on the mounting bracket 2 and transferring it to the housing 1 for further auxiliary heat dissipation.

[0051] In this embodiment, the second heat dissipation gap 46 is connected to the first air duct 41 and / or the second air duct 42; it can be understood that the second heat dissipation gap 46 may be connected only to the first air duct 41, only to the second air duct 42, or simultaneously to both the first air duct 41 and the second air duct 42.

[0052] It is understood that there are multiple ways to achieve the connection between the second heat dissipation gap 46 and the first air duct 41 and / or the second air duct 42. For example, the mounting bracket 2 may have a ventilation hole penetrating its wall, with one end of the ventilation hole connected to the first air duct 41 and the other end connected to the second heat dissipation gap 46; or, the edge of the mounting bracket 2 may have a notch that connects the second air duct 42 and the second heat dissipation gap 46; or, the gap between the mounting bracket 2 and the housing 1 may directly communicate with the first air duct 41 or the second air duct 42 without the need for additional through holes; as long as airflow can be achieved between the second heat dissipation gap 46 and the first air duct 41 and / or the second air duct 42, this utility model does not impose any restrictions.

[0053] In one implementation, see Figure 4 The housing 1 is further provided with a heat-conducting substrate 12a, which is disposed between the mounting bracket 2 and the inner wall of the housing 1. One side of the heat-conducting substrate 12a is attached to the inner wall of the housing 1, and the other side is in contact with the battery 6.

[0054] It is understood that the thermally conductive substrate 12a may be selected as a heat dissipation material such as thermally conductive silicone, graphene sheet or metal heat sink, so as to further dissipate heat inside the housing 1.

[0055] In one implementation, see Figure 5 and Figure 6 The housing 1 is provided with a telescopic cable module 7, at least part of which is located in the first air duct 41. The charging connector on the telescopic cable module 7 extends out of the housing 1 and is telescopically movable relative to the housing 1.

[0056] It is understandable that the airflow in the first air duct 41 carries away heat as it flows over the surface of the circuit board assembly 3 and the retractable cable module 7, thus achieving joint heat dissipation of the circuit board assembly 3 and the retractable cable module 7 using the same air duct system. This eliminates the need for a separate heat dissipation structure for the retractable cable module 7, which is beneficial for miniaturization and compactness of the overall structure of the charging device.

[0057] Optionally, the charging connector and the air inlet 1a are located on different sides of the housing 1.

[0058] In this embodiment, by placing the charging connector and the air inlet 1a on different sides of the housing 1, the charging connector or cable is prevented from blocking the air inlet 1a, ensuring the air inlet 1a is unobstructed and enabling the cooling fan 5 to continuously and effectively draw in external cold air.

[0059] In one implementation, see Figure 2 and Figure 3 A third air duct 43 is defined between one side of the mounting bracket 2 and the housing 1. The cooling fan 5 is disposed in the third air duct 43. The third air duct 43 connects the first air duct 41 and / or the second air duct 42.

[0060] In one implementation, see Figure 2 and Figure 3 The distance between the cooling fan 5 and the air inlet 1a is greater than the distance between the fan and the air outlet 1b.

[0061] Since the cooling fan 5 is located at the end of the third air duct 43 near the air outlet 1b, when the cooling fan 5 is working, it continuously draws air from the housing 1. External cold air flows into the first air duct 41 and / or the second air duct 42 from the air inlet 1a. After passing through the surface of heat-generating components such as the circuit board assembly 3 and the battery 6 and carrying away heat, the hot air enters the third air duct 43 and converges at the fan. Finally, it is discharged from the air outlet 1b, thus limiting the heat dissipation path of the air.

[0062] In one implementation, see Figure 4 The housing 1 includes an outer shell 11 and a cover 12. The outer shell 11 has a receiving cavity 11a with one end open. The cover 12 covers the outer shell 11 and closes the receiving cavity 11a. The air inlet 1a is provided on the outer shell 11, and the air outlet 1b is provided on the cover 12.

[0063] In this embodiment, the air inlet 1a is located on the outer shell 11, and the air outlet 1b is located on the cover 12. It can be understood that the air inlet 1a and the air outlet 1b are respectively located on different parts of the shell 1. Since the outer shell 11 and the cover 12 are two different components of the shell 1, the air inlet 1a and the air outlet 1b are located on different sides of the shell 1. This can prevent the hot air discharged from the air outlet 1b from directly circulating to the air inlet 1a and being re-inhaled into the shell 1, which would cause the hot air to form a local thermal circulation between the shell 1 and the external environment, thereby affecting the heat dissipation efficiency.

[0064] In one implementation, see Figure 5 and Figure 6 The outer casing 11 has a face shell 14 on one side, and a display component 13 is provided between the face shell 14 and the outer casing 11. The display component 13 is electrically connected to the circuit board, and at least a portion of the face shell 14 facing the display component 13 is configured as a light-transmitting element.

[0065] It is understood that the display component 13 is disposed between the faceplate 14 and the outer casing 11. The display component 13 is electrically connected to the circuit board, and the circuit board transmits various operating parameters of the charging device to the display component 13 for display, so that the user can view the operating status of the charging device in real time. The specific type of the display component 13 is not limited. For example, the display component 13 can be any of the following: LCD display screen, LED digital tube, OLED display screen, or dot matrix screen.

[0066] It should be noted that the light-transmitting element refers to the area on the faceplate 14 located directly in front of the display component 13 that is transparent or semi-transparent, so that the information displayed by the display component 13 can be observed by the user through the faceplate 14. This embodiment does not impose specific limitations on the light-transmitting element.

[0067] Optionally, the faceplate 14, the air inlet 1a, and the air outlet 1b are located on different sides of the housing 1.

[0068] In this embodiment, the display component 13 occupies a different surface of the housing 1 than the air inlet 1a and the air outlet 1b, thus preventing cold and hot air from the air inlet 1a or the air outlet 1b from affecting the user. Since the user will observe the status of the charging device such as the power level through the display screen, if the air inlet 1a or the air outlet 1b is located on the same side of the display screen, the air it draws in or the hot air it exhausts will seriously affect the user's experience.

[0069] In one implementation, see Figure 2 and Figure 5 The circuit board also includes a third circuit board 33, which is disposed in the first air duct 41 and fixedly connected to the second circuit board 32 and the mounting bracket 2 respectively. The third circuit board 33 is provided with a voltage sampling terminal and an internal resistance detection circuit. The voltage sampling terminal and the internal resistance detection circuit are both electrically connected to the battery 6, and are used to collect the internal resistance and voltage data of the battery 6 and transmit the data to the display component 13 to display the power status of the battery 6.

[0070] For example, the second circuit board 32 may be provided with a plug-in slot, and the third circuit board 33 is plugged into the second circuit board 32 and fixed by the mounting bracket 2.

[0071] Understandably, during long-term use, the internal resistance of battery 6 will gradually increase, and the terminal voltage of battery 6 will change accordingly with the change in internal resistance. Therefore, by collecting the internal resistance and voltage data of battery 6, the health status of battery 6 can be comprehensively assessed. For example, the voltage sampling terminal and the internal resistance detection circuit are both electrically connected to battery 6; the positive and negative terminals of battery 6 are electrically connected to the voltage sampling terminal and the internal resistance detection circuit on the third circuit board 33 through wires or conductive connectors.

[0072] It is understandable that the third circuit board 33 will also generate heat when it is working. By placing it in the first air duct 41, it can be cooled by the airflow in the first air duct 41. There is no need to set up a separate heat dissipation structure for the third circuit board 33, which is conducive to the compactness of the overall structure of the charging device.

[0073] In one implementation, see Figure 4 The inner wall of the housing 1 at the location of the air inlet 1a and / or the air outlet 1b is also provided with an installation groove, and a protective net is provided in the installation groove.

[0074] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A charging device, characterized by, include: The housing has an air inlet and an air outlet; Mounting bracket, disposed within the housing; A circuit board assembly is disposed within the housing and located on the mounting bracket. A first air duct is formed between the circuit board assembly and the mounting bracket, and a second air duct is formed between the circuit board assembly and the inner wall of the housing. The circuit board assembly is provided with an air passage that connects the first air duct and the second air duct. An air inlet is connected to the first air duct and / or the second air duct, and an air outlet is connected to the first air duct and / or the second air duct. The circuit board assembly includes a first circuit board and a second circuit board, which are disposed opposite to each other. At least part of the mounting bracket is disposed between the first circuit board and the second circuit board, and the first circuit board, the second circuit board and the mounting bracket together define the first air duct. A cooling fan, located inside the housing, drives air to flow from the air inlet into the first and second air ducts, and out through the air outlet.

2. The charging device as described in claim 1, characterized in that, The first circuit board, the second circuit board, the housing, and the mounting bracket together define the first air duct.

3. The charging device as described in any one of claims 1 or 2, characterized in that, The first circuit board is spaced apart from the inner wall of the housing and defines a first sub-air duct. The air passage includes a first groove on the first circuit board, and the first groove connects the first sub-air duct and the first air duct. And / or, the second circuit board is spaced apart from the inner wall of the housing and defines a second sub-air duct, the air passage including a second groove on the second circuit board, the second groove connecting the second sub-air duct and the first air duct.

4. The charging device as described in claim 3, characterized in that, The mounting bracket is equipped with a battery, which is electrically connected to the circuit board assembly. There is a first heat dissipation gap between the battery and the inner wall of the housing. The first sub-air duct and / or the second sub-air duct are connected to the first heat dissipation gap.

5. The charging device as described in any one of claims 1 or 2, characterized in that, At least a portion of the mounting bracket has a second heat dissipation gap with the housing, and at least a portion of the second heat dissipation gap communicates with the first air duct and / or the second air duct.

6. The charging device as claimed in claim 1, characterized in that, The housing is provided with a telescopic cable module, at least part of which is located in the first air duct. The charging connector on the telescopic cable module extends out of the housing and is telescopically movable relative to the housing. And / or, the charging connector and the air inlet are located on different sides of the housing.

7. The charging device as described in any one of claims 1 or 2, characterized in that, A third air duct is defined between one side of the mounting bracket and the housing, and the cooling fan is disposed in the third air duct. The third air duct connects the first air duct and / or the second air duct.

8. The charging device as claimed in claim 7, characterized in that, The distance between the cooling fan and the air inlet is greater than the distance between the fan and the air outlet.

9. The charging device as claimed in claim 1, characterized in that, The housing includes an outer shell and a cover. The outer shell has a receiving cavity with one end open. The cover closes the outer shell and seals the receiving cavity. The air inlet is located on the outer shell, and the air outlet is located on the cover.

10. The charging device as claimed in claim 9, characterized in that, A faceplate is provided on one side of the outer casing, and a display component is provided between the faceplate and the outer casing. The display component is electrically connected to the circuit board, and at least a portion of the faceplate facing the display component is configured as a light-transmitting element. And / or, the faceplate, the air inlet, and the air outlet are located on different sides of the housing.

11. The charging device as claimed in claim 10, characterized in that, The circuit board also includes a third circuit board, which is disposed in the first air duct and fixedly connected to the second circuit board and the mounting bracket respectively. The third circuit board is provided with a voltage sampling terminal and an internal resistance detection circuit. Both the voltage sampling terminal and the internal resistance detection circuit are electrically connected to the battery to collect the internal resistance and voltage data of the battery and transmit the data to the display component to display the battery's power status.

12. The charging device as claimed in claim 4, characterized in that, The housing also includes a thermally conductive substrate, which is disposed between the mounting bracket and the inner wall of the housing. One side of the thermally conductive substrate is in contact with the inner wall of the housing, and the other side is in contact with the battery.

13. The charging device as claimed in claim 1 or 2, characterized in that, The inner wall of the housing at the location of the air inlet and / or the air outlet is also provided with a mounting groove, and a protective net is provided in the mounting groove.

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