Charging device

Abstract

The utility model discloses a charging device. The charging device comprises a shell assembly; the first charging part is installed on the shell assembly, and a first air inlet is formed in the first charging part; the second charging part is installed on the shell assembly, a second air inlet is formed in the second charging part, and the output current value of the second charging part is different from the output current value of the first charging part; the first air outlet and the second air outlet are formed in the shell assembly or the first charging part, a first air channel is formed between the first air inlet and the first air outlet, a second air channel is formed between the second air inlet and the second air outlet, and the first air channel and the second air channel are not communicated; the first fan is mounted in the first air duct and is used for generating first airflow which flows into the first air duct from the first air inlet and then flows out of the first air outlet; the second fan is installed in the second air duct and used for generating second air flow which flows into the second air duct from the second air inlet and then flows out of the second air outlet. The battery pack can be cooled, the charging efficiency is improved, and components are protected.

Description

Technical Field

[0001] This application belongs to the field of charging technology, specifically relating to a charging device. Background Technology

[0002] Power tools such as electric drills and chainsaws typically use lithium-ion battery packs for power. After a period of use, these tools need to be recharged. However, charging generates a significant amount of heat. If the charging device is not designed optimally, this heat can accumulate and not dissipate quickly enough. This heat can also be generated by internal chemical reactions within the battery pack, or by inadequate design of both the charger and the battery pack. Ultimately, this leads to low charging efficiency and may even cause aging and damage to components.

[0003] Therefore, it is necessary to provide a charging device to address the aforementioned technical problems.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this application is to provide a charging device that can dissipate heat from the battery pack, improve charging efficiency, and protect components.

[0006] To achieve the above objectives, a specific embodiment of this application provides the following technical solution:

[0007] A charging device, the charging device comprising:

[0008] Housing assembly;

[0009] A first charging unit is installed on the housing assembly, and the first charging unit is provided with a first air inlet;

[0010] A second charging unit is installed on the housing assembly. The second charging unit is provided with a second air inlet. The output current value of the second charging unit is different from the output current value of the first charging unit.

[0011] The first air duct connects the first air inlet and the first air outlet on the housing assembly or the first charging unit.

[0012] The second air duct connects the second air inlet and the second air outlet on the housing assembly or the second charging unit. The second air duct and the first air duct are not connected to each other.

[0013] A first fan is installed in the first air duct. The first fan is used to generate a first airflow that flows into the first air duct from the first air inlet and flows out from the first air outlet.

[0014] The second fan is installed in the second air duct and is used to generate a second airflow that flows into the second air duct from the second air inlet and out of the second air outlet.

[0015] In one or more embodiments of this application, the charging device includes a heat dissipation duct, a first air duct and a second air duct are integrally formed on the heat dissipation duct, and a partition plate is provided between the first air duct and the second air duct.

[0016] In one or more embodiments of this application, the first fan includes a first air inlet and a first air outlet, the first air inlet being directly or indirectly connected to the heat dissipation duct, and the first air outlet being directly or indirectly connected to the first air outlet; and / or,

[0017] The second fan includes a second air inlet and a second air outlet. The second air inlet is directly or indirectly connected to the cooling duct, and the second air outlet is directly or indirectly connected to the second air outlet; and / or,

[0018] The heat dissipation path of the first fan is shorter than that of the second fan. The first fan is a centrifugal fan, and the second fan is an axial fan.

[0019] In one or more embodiments of this application, the heat dissipation duct includes a main body, a first connecting part, and a second connecting part. The partition plate is disposed between the main body and the first connecting part. The first connecting part has a first opening communicating with a first air inlet and a second opening communicating with the first opening. The second connecting part has a third opening communicating with a second air inlet and a fourth opening communicating with the third opening. The first fan is mounted on the second opening, and the second fan is mounted on the fourth opening. The second opening is disposed on the first connecting part, and the fourth opening is disposed on the main body or the second connecting part.

[0020] In one or more embodiments of this application, the housing assembly has a third air inlet and a third air outlet, and a third air duct is formed inside the housing assembly to connect the third air inlet and the third air outlet. The charging device further includes a third fan mounted on the housing assembly. The third fan is used to generate a third airflow that flows into the third air duct from the third air inlet and out of the third air outlet. The charging device also includes a circuit board disposed in the third air duct.

[0021] In one or more embodiments of this application, the housing assembly has a plurality of mounting slots distributed circumferentially for mounting a first charging unit or a second charging unit, and the number of mounting slots is greater than or equal to the sum of the number of the first charging unit and the second charging unit.

[0022] In one or more embodiments of this application, the housing assembly includes a first housing and a second housing that are mounted to each other, the first housing having a first groove and the second housing having a second groove, the first groove and / or the second groove forming an assembly groove.

[0023] In one or more embodiments of this application, the output current value of the first charging unit is greater than the output current value of the second charging unit; and / or,

[0024] The output current of the first charging unit is [0A, 9A], and the output current of the second charging unit is [0A, 4A].

[0025] In one or more embodiments of this application, the charging device further includes a baffle assembly mounted on the mounting portion of the first charging unit and / or the mounting portion of the second charging unit. The baffle assembly includes a baffle movably disposed in the housing assembly and a reset member, the reset member having a tendency to cause the baffle to close the first air inlet and / or the second air inlet.

[0026] In one or more embodiments of this application, one of the baffle and the mounting portion is provided with a slider, and the other is provided with a groove that mates with the slider; and / or,

[0027] The housing assembly includes a support portion located below the baffle, and the reset member abuts against both the support portion and the baffle; and / or,

[0028] The lower surface of the baffle is provided with a fixing member for mounting the reset member.

[0029] Compared with the prior art, the charging device of this application can ensure the heat dissipation performance of the charging device while charging multiple battery packs, preventing heat from concentrating near the battery packs during charging, thereby improving the charging speed and efficiency of the charging device, and further dissipating heat from the components to ensure their service life. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application 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 recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is an exploded view of a charging device according to an embodiment of this application;

[0032] Figure 2 This is a side view of the charging device in one embodiment of this application;

[0033] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at point BB;

[0034] Figure 4 This is a schematic diagram of the vertical structure of the heat dissipation duct, the first fan, and the second fan in one embodiment of this application;

[0035] Figure 5 This is a top view of the charging device in one embodiment of this application;

[0036] Figure 6 This is a top view of the structure of the charging device inserted into the battery pack in one embodiment of this application;

[0037] Figure 7 for Figure 6 A schematic diagram of the cross-sectional structure at the CC section;

[0038] Figure 8 for Figure 6 Schematic diagram of the cross-sectional structure at point DD;

[0039] Figure 9 for Figure 8 Enlarged view of the local structure at point A in the middle.

[0040] Explanation of key figure labels:

[0041] 1-Housing assembly; 11-First housing; 111-First groove; 1111-First sub-groove; 1112-Second sub-groove; 12-Second housing; 121-Second groove; 1211-Third sub-groove; 1212-Fourth sub-groove; 13-Base; 131-Circuit board; 14-Second air outlet; 15-First air duct; 16-Second air duct; 17-Third air duct; 18-Third air inlet; 19-Third air outlet; 10-Support part;

[0042] 2-First charging section; 21-First air inlet; 22-First air outlet;

[0043] 3-Second charging section; 31-Second air inlet;

[0044] 4-Heat dissipation duct; 41-Main body; 42-First connecting part; 421-First opening; 422-Second opening; 43-Second connecting part; 431-Third opening; 411-Fourth opening; 44-Partition plate;

[0045] 5-First fan; 51-First air inlet; 52-First air outlet;

[0046] 6-Second fan; 61-Second air inlet; 62-Second air outlet;

[0047] 7-Third fan;

[0048] 81-Baffle; 811-Slider; 912-Fixing component; 82-Reset component; 800-Groove

[0049] 9-Battery pack. Detailed Implementation

[0050] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0051] Most charging devices on the market are slow-charging devices, which have low charging power and low charging efficiency. Furthermore, they cannot effectively dissipate heat from the battery pack during charging, further reducing charging efficiency. Therefore, to address these issues, this application provides a charging device.

[0052] Reference Figures 1-4 As shown, the charging device in one embodiment of this application includes: a housing assembly 1; a first charging unit 2, mounted on the housing assembly 1, the first charging unit 2 having a first air inlet 21; a second charging unit 3, mounted on the housing assembly 1, the second charging unit 3 having a second air inlet 31, the output current value of the second charging unit 3 being different from the output current value of the first charging unit 2; a first air duct 15, connecting the first air inlet 21 and a first air outlet 22 on the housing assembly 1 or the first charging unit 2; a second air duct 16, connecting the second air inlet 31 and a second air outlet 14 on the housing assembly 1 or the second charging unit 3, the second air duct 16 and the first air duct 15 being unconnected; a first fan 5, mounted in the first air duct 15, the first fan 5 being used to generate a first airflow that flows into the first air duct 15 from the first air inlet 21 and flows out from the first air outlet 22; and a second fan 6, mounted in the second air duct 16, the second fan 6 being used to generate a second airflow that flows into the second air duct 16 from the second air inlet 31 and flows out from the second air outlet 14. The first air outlet 22 is disposed on the first charging unit 2, and the second air outlet 14 is disposed on the housing assembly 1. Of course, this application is not limited to this. In other embodiments, the first air outlet 22 may also be directly disposed on the housing assembly 1, and the second air outlet 14 may also be disposed on the second charging unit 2. These solutions should all be within the protection scope of this application.

[0053] By setting different output current values ​​for the first charging unit 2 and the second charging unit 3, different charging needs, such as fast charging or slow charging, can be met. When fast charging is required, charging efficiency can be improved. At the same time, corresponding fans are set for each unit to ensure heat dissipation and prevent excessive heat concentration in the battery pack 9 (refer to) during fast or slow charging. Figure 6 (As shown) This affects the components inside the battery pack 9. These components can be MOSFETs on the PCB board, and the charging device ensures the lifespan of these components.

[0054] Specifically, the charging device in this application includes a heat dissipation duct 4. A first air duct 15 and a second air duct 16 are integrally formed on the heat dissipation duct 4. A partition plate 44 is provided between the first air duct 15 and the second air duct 16. Through the provision of the partition plate 44, the first air duct 15 and the second air duct 16 in this application can be disconnected from each other. Of course, in other embodiments, the first air duct 15 and the second air duct 16 can also be separately provided, that is, respectively provided in different air duct structures, for heat dissipation of the first charging unit 2 and the second charging unit 3. These solutions should all be within the protection scope of this application.

[0055] In order to facilitate airflow within the housing assembly 1 and to dissipate heat from the charging battery pack 9, thereby ensuring charging efficiency and lifespan, reference is made to... Figure 1 , Figure 4 As shown, the first fan 5 includes a first air inlet 51 and a first air outlet 52. The first air inlet 51 is directly connected to the second opening 422, and the first air outlet 52 is directly connected to the first air outlet 22. The housing assembly 1 has a second air outlet 14. The second fan 6 includes a second air inlet 61 and a second air outlet 62. The second air inlet 61 is directly connected to the fourth opening 411, and the second air outlet 62 is directly connected to the second air outlet 14. Of course, this application is not limited to this. In other embodiments, the first air inlet end 51 of the first fan 5 can also be indirectly connected to the second opening 422 through other air ducts or connecting structures such as air pipes formed inside the housing assembly 1. The first air outlet end 52 can also be indirectly connected to the first air outlet 22 through other air ducts or connecting structures such as air pipes formed inside the housing assembly 1. In other embodiments, the second air inlet end 61 of the second fan 6 can also be connected to the fourth opening 411 through connecting structures such as air pipes. The second air outlet end 62 can also be indirectly connected to the second air outlet 14 through other air ducts or connecting structures such as air pipes formed inside the housing assembly 1.

[0056] Furthermore, referring to Figures 2-4As shown, the heat dissipation duct 4 includes a main body 41, a first connecting part 42, and a second connecting part 43. A partition plate 44 is disposed between the main body 41 and the first connecting part 42. The first connecting part 42 has a first opening 421 communicating with the first air inlet 21 and a second opening 422 communicating with the first opening 421. The second connecting part 43 has a third opening 431 communicating with the second air inlet 31 and a fourth opening 411 communicating with the third opening 431. A first fan 5 is mounted on the second opening 422, and a second fan 6 is mounted on the fourth opening 411. The first connecting part 42 and the partition plate 44 together form a first air duct 15, and the main body 41, the second connecting part 43, and the partition plate 44 together form a second air duct 16. The number of first connecting parts 42 is the same as the number of first charging parts 2, and the number of second connecting parts 43 is the same as the number of second charging parts 3.

[0057] For example, refer to Figure 1 and combined Figure 5 As shown, in this embodiment, there is one first connecting part 42 and one first charging part 2, and five second connecting parts 43 and five second charging parts 3. The first charging part 2 provides fast charging, and the second charging part 3 provides slow charging, thus meeting different user charging needs. Specifically, the output current value of the first charging part 2 is greater than the output current value of the second charging part 3. The output current value of the first charging part 2 is [0A, 9A], and the output current value of the second charging part 3 is [0A, 4A]. For example, when a battery pack 9 is inserted into the first charging part 2, the output current value of the first charging part 2 is 9A. When one or two of the five second charging parts 3 are inserted into the battery pack 9, the output current value of the second charging part 3 inserted into the battery pack 9 is 4A, and the output current value of the other second charging parts 3 not inserted into the battery pack 9 is 0A. For example, when n (3≤n≤5) of the five second charging parts 3 are inserted into the battery pack 9, the output current value of the second charging part 3 inserted into the battery pack 9 is 9 / nA.

[0058] Of course, the number of the first connecting part 42, the first fan 5 and the first charging part 2 in this application can also be 2, 3 or more, and the number of the second connecting part 43, the second fan 6 and the second charging part 3 can also be 1, 2, 3 or more. As long as the number of the first fan 5 and the first charging part 2, the second fan 6 and the second charging part 3 does not affect their distribution on the housing assembly 1, and the arrangement of the first connecting part 42 and the second connecting part 43 does not affect their connection with the main body part 41, they should all be within the protection scope of this application.

[0059] In this embodiment, the heat dissipation path of the first fan 5 is shorter than that of the second fan 6. This facilitates rapid heat dissipation during fast charging of the battery pack 9 and sufficient heat dissipation during slow charging of the battery pack 9. Preferably, for better heat dissipation, the first fan 5 is a centrifugal fan and the second fan 6 is an axial fan.

[0060] Specifically, to facilitate the direct mounting of the first fan 5 and the second fan 6 onto the cooling duct 4, refer to... Figure 4 As shown, in this embodiment, the second opening 422 is disposed on the first connecting portion 42, and the fourth opening 411 is disposed on the main body portion 41. Specifically, the second opening 422 is disposed on the bottom wall of the first connecting portion 42, and the fourth opening 411 is disposed on the side wall of the main body portion 41. The first air inlet end 51 of the first fan 5 is directly installed on the second opening 422, and the second air inlet end 61 of the second fan 6 is directly installed on the fourth opening 411. According to this design, it is convenient to install the various structures inside the housing assembly 1, and the space occupancy rate is low without affecting air circulation. Of course, this application is not limited to this. In other embodiments, the second opening 422 may be disposed on the side wall or top wall of the first connecting portion 42; or, the fourth opening 411 may be disposed on the side wall, top wall, or bottom wall of the second connecting portion 43; or, the fourth opening 411 may be disposed on the top wall or bottom wall of the main body portion 41, as long as it is convenient to connect with the first fan 5 or the second fan 6. These solutions should all be within the protection scope of this application.

[0061] Reference Figure 7 As shown, the housing assembly 1 has a third air inlet 18 and a third air outlet 19. A third air duct 17 is formed inside the housing assembly 1, connecting the third air inlet 18 and the third air outlet 19. The charging device also includes a third fan 7 installed on the housing assembly 1. The third fan 7 is used to generate a third airflow that flows into the third air duct 17 from the third air inlet 18 and flows out of the third air outlet 19. The charging device also includes a circuit board 131 disposed in the third air duct 17. Specifically, in this embodiment, the housing assembly 1 further includes a base 13. The first housing 11, the second housing 12, and the base 13 together form a mounting cavity. The third fan 7 is mounted on the mounting cavity, and the circuit board 131 is disposed on the base 13. The third air inlet of the third fan 7 is positioned towards the gap above the circuit board 131 and below the heat dissipation duct 4 (i.e., the third air duct 17). The third air outlet of the third fan 7 is directly mounted towards the third air outlet 19. According to this design, air flowing in from the third air inlet 18 can flow through the third air duct 17 and then out through the first air outlet 22 through the rotation of the third fan 7, thereby dissipating heat. According to this design, the heat generated by the components on the circuit board 131 can be carried out of the charging device by the third airflow to ensure the service life of the charging device.

[0062] To facilitate the mounting of the first charging unit 2 and the second charging unit 3 onto the housing assembly 1, refer to... Figure 5 , Figure 6 As shown, the housing assembly 1 in this application has a plurality of mounting slots distributed circumferentially for mounting the first charging unit 2 or the second charging unit 3, and the number of mounting slots is equal to the sum of the number of the first charging unit 2 and the second charging unit 3. Of course, even if the number of mounting slots is greater than the sum of the number of the first charging unit 2 and the second charging unit 3, it will not affect the mounting of the first charging unit 2 or the second charging unit 3 on the housing assembly 1.

[0063] Reference Figure 5 As shown, the housing assembly 1 in this application includes a first housing 11 and a second housing 12 that are mounted on each other. The first housing 11 is provided with a first groove 111, and the second housing 12 is provided with a second groove 121. The first groove 111 and / or the second groove 121 form an assembly groove.

[0064] Specifically, in this embodiment, six assembly slots are circumferentially arranged and symmetrically distributed on the housing assembly 1. These assembly slots include one first assembly slot and five second assembly slots. The first assembly slot is used to install the first charging unit 2, and the second assembly slots are used to install the second charging unit 3. Further, the first assembly slot is located at the position where the first housing 11 and the second housing 12 are installed. One of the five second assembly slots is also located at the position where the first housing 11 and the second housing 12 are installed and is aligned with the first assembly slot. The remaining four second assembly slots are symmetrically arranged in pairs on the first housing 11 and the second housing 12. The first groove 111 on the first housing 11 includes two opposing first sub-grooves 1111 and two adjacent second sub-grooves 1112. The second groove 121 on the second housing 12 includes two opposing third sub-grooves 1211 and two adjacent fourth sub-grooves 1212. A first sub-slot 1111 and a third sub-slot 1211 are connected to form a first assembly slot, and another first sub-slot 1111 and another third sub-slot 1211 are connected to form a second assembly slot. The second sub-slot 1112 and the fourth sub-slot 1212 both directly form the second assembly slot.

[0065] Of course, this application is not limited to this. In other embodiments, the assembly slots formed by the connection of the first sub-slot 1111 and the third sub-slot 1211 can all accommodate the second charging unit 3, and the first charging unit 2 can be installed in one of the second sub-slot 1112 or the fourth sub-slot 1212. In yet another embodiment, the first groove 111 may only include the adjacent second sub-slot 1112, and the second groove 121 may only include the adjacent fourth sub-slot 1212. One of the second sub-slots 1112 and the fourth sub-slot 1212 can be directly used to install the first charging unit 2, while the remaining second sub-slots 1112 and the fourth sub-slot 1212 are used to install the second charging unit 3. As long as the distribution and number of the first groove 111 and the second groove 121 in these embodiments can achieve the effect of installing the first charging unit 2 and the second charging unit 3, they should all be within the protection scope of this application.

[0066] Reference Figure 1 and combined Figures 6-9 As shown, the charging device in this application also includes a baffle assembly 8, which is respectively mounted on the mounting portion of the first charging unit 2 and the mounting portion of the second charging unit 3. Specifically, the baffle assembly 8 includes a baffle 81 movably disposed in the housing assembly 1 and a reset member 82. The reset member 82 has a tendency to move the baffle 81 away from the housing assembly 1 to close the first air inlet 21 and the second air inlet 31. According to this design, the first air inlet 21 and the second air inlet 31 can be automatically opened or closed when the battery pack 9 is inserted or removed from the first charging unit 2 and the second charging unit 3.

[0067] To facilitate the sliding of the baffle 81 along its height direction, refer to Figure 9 As shown, the baffle 81 in this application is provided with a slider 811, and both the first charging part 2 and the second charging part 3 are provided with a groove 800 that cooperates with the slider 811. Of course, this application is not limited to this. When the baffle 81 is provided with a groove 800, and the first charging part 2 and the second charging part 3 are provided with sliders 811; or, only the first charging part 2 or the second charging part 3 is provided with sliders 811 or grooves 800, and the baffle 81 is provided with a groove 800 or slider 811 that cooperates with it, the same technical effect can also be achieved.

[0068] Optional, refer to Figure 8 As shown, the housing assembly 1 in this application has a support portion 10 located below the baffle 81, and the reset member 82 abuts against both the support portion 10 and the baffle 81. This design facilitates the installation of the reset member 82, allowing it to apply an elastic force to the baffle 81 to automatically open or close the first air inlet 21 and the second air inlet 31. The reset member 82 can be a component with elastic potential energy, such as a spring, rubber block, tension spring, or leaf spring.

[0069] Furthermore, referring to Figure 8As shown, the lower surface of the baffle 81 in this application is provided with a fixing member 812 for mounting the reset member 82. This design allows for a more secure and stable installation of the reset member 82, enabling it to better apply elastic force to the baffle 81.

[0070] In the description of the embodiments of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0071] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0072] In the description of the embodiments of the present invention, it should also be noted that the terms "first," "second," etc., used herein do not specifically refer to any order or sequence, nor are they intended to limit the present case; they are merely used to distinguish components or operations described using the same technical terms.

[0073] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0074] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A charging device, characterized in that, The charging device includes: Housing assembly (1); A first charging unit (2) is installed on the housing assembly (1), and the first charging unit (2) is provided with a first air inlet (21); The second charging unit (3) is installed on the housing assembly (1). The second charging unit (3) is provided with a second air inlet (31). The output current value of the second charging unit (3) is different from the output current value of the first charging unit (2). The first air duct (15) connects the first air inlet (21) and the first air outlet (22) on the housing assembly (1) or the first charging part (2); The second air duct (16) connects the second air inlet (31) and the second air outlet (14) on the housing assembly (1) or the second charging unit (3). The second air duct (16) and the first air duct (15) are not connected to each other. The first fan (5) is installed in the first air duct (15). The first fan (5) is used to generate a first airflow that flows into the first air duct (15) from the first air inlet (21) and flows out from the first air outlet (22). The second fan (6) is installed in the second air duct (16) and is used to generate a second airflow that flows into the second air duct (16) from the second air inlet (31) and flows out from the second air outlet (14).

2. The charging device according to claim 1, characterized in that, The charging device includes a heat dissipation duct (4), the first air duct (15) and the second air duct (16) are integrally formed on the heat dissipation duct (4), and a partition plate (44) is provided between the first air duct (15) and the second air duct (16).

3. The charging device according to claim 2, characterized in that, The first fan (5) includes a first air inlet (51) and a first air outlet (52). The first air inlet (51) is directly or indirectly connected to the heat dissipation duct (4), and the first air outlet (52) is directly or indirectly connected to the first air outlet (22); and / or, The second fan (6) includes a second air inlet (61) and a second air outlet (62). The second air inlet (61) is directly or indirectly connected to the heat dissipation duct (4), and the second air outlet (62) is directly or indirectly connected to the second air outlet (14); and / or, The heat dissipation path of the first fan (5) is shorter than that of the second fan (6). The first fan (5) is a centrifugal fan, and the second fan (6) is an axial fan.

4. The charging device according to claim 2, characterized in that, The heat dissipation duct (4) includes a main body (41), a first connecting part (42), and a second connecting part (43). The partition plate (44) is disposed between the main body (41) and the first connecting part (42). The first connecting part (42) is provided with a first opening (421) communicating with the first air inlet (21) and a second opening (422) communicating with the first opening (421). The second connecting part (43) is provided with a third opening (431) communicating with the second air inlet (31) and a fourth opening (411) communicating with the third opening (431). The first fan (5) is installed on the second opening (422), and the second fan (6) is installed on the fourth opening (411). The second opening (422) is disposed on the first connecting part (42), and the fourth opening (411) is disposed on the main body (41) or the second connecting part (43).

5. The charging device according to claim 1, characterized in that, The housing assembly (1) has a third air inlet (18) and a third air outlet (19). A third air duct (17) is formed inside the housing assembly (1) to connect the third air inlet (18) and the third air outlet (19). The charging device also includes a third fan (7) installed on the housing assembly (1). The third fan (7) is used to generate a third airflow that flows into the third air duct (17) from the third air inlet (18) and flows out from the third air outlet (19). The charging device also includes a circuit board (131) disposed in the third air duct (17).

6. The charging device according to claim 1, characterized in that, The housing assembly (1) has a plurality of mounting slots distributed circumferentially for mounting the first charging part (2) or the second charging part (3), and the number of mounting slots is greater than or equal to the sum of the number of the first charging part (2) and the second charging part (3).

7. The charging device according to claim 6, characterized in that, The housing assembly (1) includes a first housing (11) and a second housing (12) mounted on each other. The first housing (11) has a first groove (111) and the second housing (12) has a second groove (121). The first groove (111) and / or the second groove (121) form an assembly groove.

8. The charging device according to claim 1, characterized in that, The output current value of the first charging unit (2) is greater than the output current value of the second charging unit (3); and / or, The output current value of the first charging unit (2) is [0A, 9A], and the output current value of the second charging unit (3) is [0A, 4A].

9. The charging device according to claim 1, characterized in that, The charging device further includes a baffle assembly (8) mounted on the mounting portion of the first charging unit (2) and / or the mounting portion of the second charging unit (3). The baffle assembly (8) includes a baffle (81) movably disposed in the housing assembly (1) and a reset member (82). The reset member (82) has a tendency to cause the baffle (81) to close the first air inlet (21) and / or the second air inlet (31).

10. The charging device according to claim 9, characterized in that, One of the baffle (81) and the mounting portion is provided with a slider (811), and the other is provided with a groove (800) that mates with the slider (811); and / or, The housing assembly (1) has a support portion (10) located below the baffle (81), and the reset member (82) abuts against the support portion (10) and the baffle (81) respectively; and / or, The lower surface of the baffle (81) is provided with a fixing member (912) for mounting the reset member (82).

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