Charger with cooling air guide structure

Abstract

The invention provides a charger with a cooling air guiding structure. The charger comprises an appliance shell, a charging position for charging a rechargeable battery unit is arranged on the appliance shell, a charging electronic equipment unit is arranged in the appliance shell, and a cooling air guide structure for cooling the charging electronic equipment unit is arranged in the appliance shell. The cooling air guiding structure comprises a relatively closed guiding channel, part of charging electronic components of the charging electronic equipment unit are arranged in the guiding channel, and the guiding channel is formed after an appliance shell and a cooling shell are connected.

Description

Technical Field

[0001] This application relates to the field of charging equipment technology, and more specifically to a charger that can accommodate a charging unit. Background Technology

[0002] The charger is used to charge corresponding rechargeable battery cells. Therefore, the charger has charging positions for the battery cells to be inserted for charging. The charger internally houses a charging electronics unit to supply electrical energy to the battery cells. The charger also includes a cooling air guiding structure. In existing chargers, the cooling air guiding structure is located in the middle of multiple charging positions. This concentrates the heat-generating elements in the center, resulting in poor heat dissipation. Furthermore, the cooling housing of the cooling air guiding structure is a separate structure that needs to be connected to the appliance housing, making the structure relatively complex and costly.

[0003] Therefore, there is a need to provide a charger that can at least partially solve the above problems. Summary of the Invention

[0004] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, this application provides a charger, including a device housing, a charging position for charging a rechargeable battery cell on the device housing, a charging electronic device unit disposed inside the device housing, and a cooling air guiding structure for dissipating heat from the charging electronic device unit inside the device housing. The cooling air guiding structure includes a relatively enclosed guiding channel, and some charging electronic components of the charging electronic device unit are disposed in the guiding channel, wherein the guiding channel is formed by connecting the device housing and the cooling housing.

[0006] Optionally, the cooling air guiding structure is disposed below the charging position.

[0007] Optionally, the cooling air guiding structure further includes an air intake structure, the air intake structure including at least one air intake area, the air intake area being disposed on at least one side of the cooling housing.

[0008] Optionally, the cooling air guiding structure further includes an air outlet structure, which includes an air outlet area, and the air outlet area and the air inlet area are disposed on different sides of the cooling housing.

[0009] Optionally, the cooling air guiding structure further includes a fan, which is located near the air outlet structure.

[0010] Optionally, the appliance housing is provided with an air inlet near the air intake structure of the cooling housing, and the air inlet is located on the bottom wall of the appliance housing.

[0011] Optionally, a support base is provided on the outer surface of the appliance housing, the support base protrudes from the bottom wall of the appliance housing, and the air inlet is exposed outside the appliance housing.

[0012] Optionally, some of the charging electronic components of the charging electronic device unit are disposed outside the cooling air guiding structure, and the charging electronic components disposed inside the guiding channel are isolated from the charging electronic components disposed outside the guiding channel.

[0013] Optionally, the area within the guide channel is a high-voltage area, and the area outside the guide channel is a low-voltage area, with the high-voltage area and the low-voltage area separated by an isolator.

[0014] Optionally, the charging electronic components located in the high-voltage area are high-power charging electronic components, and the charging electronic components located in the low-voltage area are low-power charging electronic components.

[0015] Optionally, the shape of the isolation element is consistent with the shape of the junction between the high-pressure area and the low-pressure area.

[0016] Optionally, the cooling housing is detachably connected to the bottom of the appliance housing.

[0017] Optionally, the charger further includes a second cooling air guiding structure for dissipating heat from the battery cells, the second cooling air guiding structure being disposed outside the guiding channel.

[0018] Optionally, the number of the second cooling air guiding structures is adapted to the number of charging positions.

[0019] Optionally, the second cooling air guiding structure includes vents on the surface of the battery cell and a fan for exhausting hot air from the battery cell, the fan being positioned opposite the vents on the surface of the battery cell. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the charger in this application;

[0022] Figure 2a This is a schematic diagram showing the bottom wall of the charger of this application connected to the ground;

[0023] Figure 2b This is a schematic diagram showing the bottom wall of the charger of this application connected to a wall;

[0024] Figure 2c This is a schematic diagram showing the side wall of the charger of this application connected to the ground;

[0025] Figure 2d This is a schematic diagram showing the side wall of the charger of this application connected to a wall;

[0026] Figure 3 This is a three-dimensional structural diagram of the charger from another direction in this application;

[0027] Figure 4 This is a schematic diagram of the exploded structure of the charger in this application;

[0028] Figure 5 This is a schematic diagram of the structure at the bottom of the charger in this application;

[0029] Figure 6 for Figure 4 Enlarged view of part A;

[0030] Figure 7 This is a schematic diagram of the device housing of the charger in this application;

[0031] Figure 8 This is a three-dimensional structural diagram of the cooling air guiding structure of the charger in this application;

[0032] Figure 9 This is a top view schematic diagram of the cooling air guiding structure of the charger in this application;

[0033] Figure 10 This is a schematic diagram of the structure of the isolation component of the charger in this application;

[0034] Figure 11 This is a schematic diagram of the cooling housing of the charger in this application;

[0035] Figure 12 This is a schematic diagram showing the bottom wall of the charger in this application connected to a building;

[0036] Figure 13 This is a schematic diagram of the airflow in the second cooling air guiding structure of the charger in this application;

[0037] Figure 14 This is a three-dimensional structural diagram of the second cooling air guiding structure of the charger in this application.

[0038] Figure 15 This is a three-dimensional structural diagram of the charger of this application after the upper casing has been removed.

[0039] Figure 16 This is a schematic diagram of the wiring harness limiting seat of the charger in this application.

[0040] Figure 17 This is another exploded structural diagram of the charger in this application. Detailed Implementation

[0041] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Reference Figure 1 This application discloses a charger 10 for charging a rechargeable battery unit 500. The charger 10 can be placed directly on the ground or connected to a building, preferably in a detachable manner. Specifically, for example, the bottom wall 104 of the charger (i.e., the side opposite to the operating side described below) is connected to the ground 21. Figure 2a As shown, the bottom of the charger can also be connected to wall 22, such as... Figure 2b As shown; for example, the side wall 105 of the charger (i.e., the side adjacent to the operating side described below) is connected to the ground 21, as shown. Figure 2c As shown, the side wall of the charger can also be connected to wall 22, such as... Figure 2d As shown.

[0043] The charger 10 mentioned above includes:

[0044] The appliance housing 100 has at least one charging position 130 for accommodating a battery cell;

[0045] A charging electronic device unit is disposed within the appliance housing 100; and

[0046] Cooling air guiding structure 200 is used to guide cooling air through.

[0047] like Figure 1 As shown, the device housing 100 has an operating side 101, and the charging position 130 is formed on the operating side 101. The charging position 130 is recessed from the operating side 101 into the device housing to form a recess 131 for accommodating the battery unit. The charging position 130 is provided with a plurality of first charging contacts 132, such as... Figure 3As shown, the first charging contact 501 is used to electrically connect with the second charging contact 501 on the battery unit 500. The electrical connection between the first charging contact and the second charging contact can be a plate-like connection, i.e., one of them is a metal insert and the other is a metal slot. When the metal insert is inserted into the slot and successfully paired, the two are electrically connected. Of course, the electrical connection between the first charging contact and the second charging contact can also adopt other connection methods, such as a pin-like connection or a rivet connection. A locking part 133 is provided on the side wall of the recess 131 for the battery unit to lock in. That is, the locking slot 502 of the battery unit mates with the locking part 133 in the charging position to realize the mechanical connection between the battery unit and the charger. The first charging contact 132 is provided on the locking part 133 and extends upward. When the battery unit is inserted into the charging position, the locking slot of the battery unit slides in along the locking part to realize the mechanical connection between the battery unit and the charger. At the same time, the first charging contact and the second charging contact contact each other to realize the electrical connection between them.

[0048] There is at least one charging position 130, preferably multiple charging positions 130, which are evenly arranged to allow multiple charging units to be charged simultaneously; at the same time, the card portion is preferably located on the side wall of the charging position near the housing of the device.

[0049] The charger 10 is connected to the building via a support 300, which is connected to the surface of the appliance housing and to the building. The support provides support and protection for the charger and reduces damage to the charger in the event of a collision.

[0050] Specifically, the surface of the appliance housing 100 is provided with a connecting portion 102 for positioning the support base 300, such as... Figure 4 As shown, the shape of the support base 300 is adapted to the shape of the connecting part 102, which is recessed into the appliance housing. The connecting part is located at a corner 103 of the appliance housing 100 to avoid obstructing the air inlet or outlet on the surface of the appliance housing. In some embodiments, there are four sets of support bases, which are linear and extend vertically, respectively located at the four corners of the appliance housing. Specifically, the corners for connecting the support bases are located between two adjacent side walls. In other embodiments, there are two sets of support bases, which are U-shaped. Specifically, they cover the bottom and side walls of the appliance housing. The horizontal connecting part is located at the corner between the side and bottom walls of the appliance housing, and the two vertical connecting parts are located at the corners of two adjacent side walls of the appliance housing. The shape of the connecting part is adapted to the support base.

[0051] In some embodiments, the support base 300 protrudes from the appliance housing 100. When the appliance housing 100 is connected to the ground or wall, a gap is left between the appliance housing 100 and the ground or wall to allow air circulation inside and outside the appliance housing, while also protecting the area around the charger.

[0052] like Figure 5 As shown, the bottom 301 of the support base 300 is provided with a first mounting member 310 for the support base 300 to be connected to the appliance housing 100 by fasteners. There are several first mounting members 310, which are evenly distributed on the support base 300. The bottom of the support base 300 is also provided with several shock absorbers 320 to buffer and absorb shock for the charger.

[0053] The bottom 301 of the aforementioned support base 300 has a first fixing area 303, which is located on the side protruding from the appliance housing 100. The first fixing area 303 is provided with a plurality of first fixing elements 330 for fastener installation, thereby enabling the charger to be connected to the ground or wall. The extension direction of the first fixing elements 330 is perpendicular to the operating surface. The support base 300 also has a second fixing area 304, which is located on the side 302 of the support base and on the side protruding from the appliance housing. The second fixing area 304 is provided with a plurality of second fixing elements 340, which extend in a different direction than the first fixing elements 330, specifically, parallel to the operating surface.

[0054] The first fixing element 330 and the second fixing element 340 are provided with metal bushings 350. When connected, the fasteners pass through the metal bushings and are connected to the ground or wall to strengthen the fixing elements and prevent them from deforming.

[0055] The top 305 of the aforementioned support base 300 is provided with a second mounting member 370 that connects to the appliance housing 100 for fastener connection, thereby realizing the connection between the support base and the appliance housing.

[0056] The aforementioned device housing 100 is provided with a handle 400 for easy handling by the user and for greater portability. There is at least one set of handles 400. The handles 400 are connected to the operating side of the device housing 100 and protrude from the operating side so that the user can grip the charger and move it.

[0057] Specifically, the handle 400 is U-shaped, and its bottom 401 is connected to the appliance housing 100. The appliance housing 100 is provided with a mounting portion 106 for positioning and connecting the handle 400. Figure 6 As shown, the mounting part 106 is located at the corner of the operating side 101;

[0058] Simultaneously, the bottom 401 of the handle 400 is connected to the support base 300. At this time, the handle 400 is provided with a receiving groove 402 for the mounting part 106 to accommodate, so as to realize the simultaneous positioning connection of the handle with the appliance housing and the support base. The top of the support base 300 is provided with a positioning element 630 for positioning the handle with the support base. Specifically, the bottom 306 of the support base is also provided with a third mounting member 380 connected to the handle 400. Among them, an arc-shaped groove 307 is provided between the second mounting member 370 and the third mounting member 380 to adapt to the corner area of ​​the appliance housing, so as to facilitate the installation and positioning of the support base.

[0059] The handle portion 400 includes an upper handle 410 and a lower handle 420 connected to the upper handle 410. When connected, the lower handle 420 is connected to the mounting portion 106 and the support base 300 of the appliance housing. The upper handle 410 covers the lower handle 420 and the two are connected by fasteners. The upper handle 410 serves a decorative function to close the connection between the lower handle and the appliance housing.

[0060] The aforementioned appliance housing 100 is composed of a lower housing 110 and an upper housing 120, as follows: Figure 7 As shown, the upper housing 120 is detachably connected to the lower housing 110, which can be connected by fasteners, magnetic elements, or hook and loop fasteners. The charging position 130 is integrally formed on the upper housing 120, and the mounting part 106 for connecting the handle is formed on the upper housing 120, while the connecting part 102 for connecting the support base is formed on the lower housing 110.

[0061] The lower housing 110 has an inner cavity providing a receiving space 111 for arranging the charging electronic device unit. This receiving space 111 is formed at the bottom of the cavity of the lower housing. The receiving space 111 includes a first region 111a and a second region 111b, as shown below. Figure 8 As shown, some of the charging electronic equipment units are arranged in the first region 111a, and some of the charging electronic equipment units are arranged in the second region 111b. Specifically, the first region 111a is configured as a high-voltage region for arranging high-power first charging electronic components, and the second region 111b is configured as a low-voltage region for arranging low-power second charging electronic components.

[0062] The first charging electronic component is mainly an electronic component powered by AC, an electronic component that inverts AC to DC, and an electronic component that rectifies DC to AC. The second charging electronic component is a low-voltage DC electronic component. Specifically, in some embodiments, the first charging electronic component located in the high-voltage region is configured as an electronic component with a DC voltage of 63V or higher or an electronic component powered by AC, and the second charging electronic component located in the low-voltage region is configured as an electronic component with a DC voltage of 63V or lower. In other embodiments, the first charging electronic component is configured as an electronic component with a DC voltage of 90V or higher or an electronic component powered by AC, and the second charging electronic component is configured as an electronic component with a DC voltage of 90V or lower.

[0063] The first region 111a and the second region 111b are independent of each other, and a separator 210 can be provided between the first region 111a and the second region 111b, such as... Figure 9 As shown, the isolator 210 is used to isolate the first charging electronic component and the second charging electronic component. The isolator 210 is disposed at the junction between the first region 111a and the second region 111b to isolate the high-voltage region and the low-voltage region, and to prevent the heat generated in the high-voltage region from affecting the low-voltage region. The shape of the isolator 210 is consistent with the shape of the junction between the first region 111a and the second region 111b. In this embodiment, the two adjacent sides of the second region 111b are surrounded by the first region 111a. The isolator 210 is disposed on the two adjacent sides of the second region 111b that intersect with the first region 111a. That is, the isolator 210 is arranged at a right angle to isolate the first region and the second region.

[0064] The aforementioned isolating member 210 is connected to the lower housing 110. Specifically, the lower housing 110 is provided with a fourth mounting member 211, such as... Figure 10 As shown, the spacer 210 is connected to the lower housing 110 by fasteners for fastening, or it can be connected to the receiving space by magnetic or hook-and-loop fasteners.

[0065] The aforementioned isolator 210 has guide portions at both ends, which are adapted to the lower housing to achieve positioning connection to the lower housing 110. The guide portion can be a protrusion 212a protruding from the body or a groove 212b recessed into the body. The protrusion 212a or groove 212b is adapted to the lower housing 110 to satisfy the positioning connection between the isolator and the lower housing.

[0066] The upper surface of the aforementioned isolation member 210 is provided with a downwardly recessed wiring groove 213 for positioning the connecting wire harness within the wiring groove 213; wherein, the opening of the wiring groove is provided with a plurality of hooks 214, which are arranged at intervals along the extension direction of the wiring groove 213 to hold the connecting wire harness and prevent the connecting wire harness from detaching from the wiring groove, and the plurality of hooks 214 are distributed on both sides of the opening of the wiring groove.

[0067] like Figure 9 As shown, the aforementioned charging electronic device unit includes a control board 700, and a first charging electronic component and a second charging electronic component arranged on the control board 700. The control board 700 is integrally formed, making the structure of the charging electronic device unit simpler and the manufacturing process more convenient. The first charging electronic component and the second charging electronic component are electrically connected by the control board, that is, the electrical connection between the two is achieved by the control board, so that the two do not need to be connected by a wiring harness. The first charging electronic component is configured as a high-power charging electronic component, which generates more heat when it is working, while the second charging electronic component is configured as a low-power charging electronic component, which generates less heat when it is working. The wiring harness of the charging electronic component or indicator light at the charging position is connected to the first charging electronic component, and the connection between the charging electronic components can be a plug-in method.

[0068] After the second charging electronic component is connected to the control board, it is potted and sealed to enhance the protection of the second electronic component.

[0069] The aforementioned cooling air guiding structure 200 is disposed below the aforementioned charging position 130. At this time, the first charging electronic component disposed within the cooling air guiding structure 200 is separated from the charging position, making it easier to dissipate heat. It has a guiding channel 230, which is in a relatively sealed state to allow air to pass through. The cooling air guiding structure 200 includes a cooling housing 220, which is connected to the lower housing and covers the aforementioned accommodating space 111. The cooling housing 220 is detachably connected to the lower housing 110 to facilitate the installation and subsequent maintenance of the charging electronic device unit. After the cooling housing 220 is connected to the lower housing 110, its inner cavity forms the aforementioned guiding channel 230, and the aforementioned first charging electronic component is arranged within the guiding channel 230.

[0070] The lower housing 110 has a plurality of mounting ribs 112 integrally formed therein for connecting the cooling housing, and the mounting ribs are located at the edge of the accommodating space.

[0071] The cooling air guiding structure 200 includes an air inlet structure 240 and an air outlet structure 250, located on different, relatively far sides of the cooling housing. Both the air inlet structure 240 and the air outlet structure 250 are connected to the guiding channel 230. Air is drawn in through the air inlet structure 240 and discharged through the air outlet structure 250. Specifically, the air inlet structure 240 consists of air inlet areas 241 located on two adjacent sides of the cooling housing 220, and the air outlet structure 250 includes an air outlet area 251 located on the side of the cooling housing 220 away from the air inlet area 241. Both the air inlet and air outlet areas are close to the appliance housing 100. Furthermore, the air inlet area 241 and the air outlet area 251 are located on the cooling housing 220, such as... Figure 11 As shown.

[0072] Meanwhile, an air inlet 107 is provided on the appliance housing 100 to guide air into the appliance housing, facilitating the guidance of cooling air into the cooling air guiding structure. This air inlet 107 is preferably located on the bottom wall 104 of the appliance housing. Figure 5 As shown, the air inlet 107 is covered by the support base 300. The support base 300 also has a through hole 361 communicating with the air inlet 107. This through hole 361 is located on a connecting protrusion 360 protruding from the support base 300. Figure 4 As shown, the bottom wall 104 of the appliance housing is provided with a connecting groove 108 that matches the connecting protrusion 360. The air inlet 107 is provided on the connecting groove 108 to realize the positioning connection between the support base and the appliance housing. Meanwhile, the bottom of the support base 300 is hollowed out, and the through hole 361 communicates with the outside through the hollowed-out part.

[0073] The middle portion of the bottom 301 of the aforementioned support is convex upwards, creating a gap 800 between the middle and bottom of the support to allow air to enter. Figure 12 As shown, on the one hand, when the lower casing is installed on the ground or wall, the support base will not be in close contact with the ground or wall, which facilitates air entry. On the other hand, there is a height difference between the through hole and the bottom of the support base to prevent water from entering the charger from the air inlet.

[0074] The cooling air guiding structure 200 also includes a fan 260, such as Figure 9As shown, the fan 260 is located at the exhaust structure 230. The lower housing 110 is provided with a first mounting groove 109 for the fan 260 to be installed. The first mounting groove 109 is located at the air outlet of the appliance housing. At this time, the appliance housing 100 is provided with a second mounting groove 261 for the fan 260 to be installed. When the cooling housing 220 is connected to the lower housing 110, the first mounting groove 109 and the second mounting groove 261 are connected to form a mounting groove for the fan 260. The connection between the cooling housing and the lower housing can be a fastener connection or a snap-fit ​​or slot connection.

[0075] The device housing is also provided with a second cooling air guiding structure 900. The second cooling air guiding structure 900 is located outside the cooling guiding structure 200 and inside the charging position 130, and is used to dissipate heat from the battery unit. The number of the second cooling air guiding structures 900 is adapted to the number of charging positions, that is, each charging position is provided with a second cooling air guiding structure 900.

[0076] The aforementioned second cooling air guiding structure 900 includes vents 503 disposed on the surface of the battery cell 500, such as... Figure 13 and Figure 14 As shown, air enters the battery unit 500 through the gap B at the battery charging position. A fan 260 is provided inside the charging position 130, and the fan 260 is mounted on the locking part 133 of the charging position. When the fan 260 is working, it exhausts the air passing through the battery unit 500 to the outside of the appliance housing, thereby achieving the purpose of heat dissipation and cooling of the battery unit. Preferably, each side of the battery unit 500 is provided with the aforementioned air hole 503, and the fan 260 is directly opposite one of the air holes 503, which facilitates the entry or exit of air from the battery unit. At this time, a second air outlet 105a is provided on the side wall 105 of the appliance housing for the air to be discharged from the charging position 130, and the second air outlet 105a is directly opposite the fan 260 located inside the charging position.

[0077] like Figure 14 As shown, an air guide shroud 140 is provided on the inner side wall of the lower housing 110, and the aforementioned fan 260 is disposed inside the air guide shroud 140. At least one fixing hole 141 is provided on the outer side wall of the air guide shroud 140, which can be used to connect the wire harness at the charging position to the fixing hole 141 through a fixing member, so as to facilitate the gathering and fixing of various wire harnesses at each charging position together; specifically, the fixing member can be a wire harness cable tie or a buckle.

[0078] A wire harness limiting seat 600 is provided inside the lower housing 110. The wire harness limiting seat 600 is located in the middle of the cavity of the lower housing. Figure 15As shown, it is located between the upper and lower housings, that is, between the charging position and the cooling air guiding structure, and is used to organize the wire harness. The wire harness limiting seat 600 plays the role of organizing the wire harness.

[0079] The aforementioned wire harness limiting seat 600 is provided with a wire threading hole 610, such as Figure 16 As shown, it is used for wire harnesses to pass through, making it easy to organize the wire harnesses; wherein, a separator 620 is provided in the wire hole 610, which divides the wire routing channel into several parts for the classification and organization of wire harnesses. Among them, some wire routing channels are used to pass through the relevant wire harnesses led out from each battery unit, and other wire routing channels are used to pass through the relevant wire harnesses of the charging operation side indicator lights.

[0080] The wiring harness limiting seat 600 is fixedly connected to the lower housing 110, and the upper housing 120 is fixedly connected to the wiring harness limiting seat 600, facilitating the assembly and fixation between the upper and lower housings and improving the internal strength and stability of the charger; specifically, as shown... Figure 17 As shown, the wire harness limiting seat 600 is provided with a third fixing element 630, which is a slot. The lower end of the upper housing 120 is provided with a positioning post 121 for inserting the third fixing element. The positioning post is located below the charging position. The number of the third fixing elements 630 is matched with the number of charging positions on the upper housing. That is, the positioning post 121 is provided below each charging position. When the upper housing of the appliance housing is installed on the lower housing, the positioning post 121 at each charging position is perfectly fitted and installed on the third fixing element 630, so that the wire harness limiting seat supports the upper housing.

[0081] Meanwhile, the wire harness limiting seat 600 is provided with a fourth fixing element 640 for fastener connection between the wire harness limiting seat and the lower housing. Correspondingly, the lower housing 110 of the appliance housing extends into the appliance housing to form a connecting post 113. The fourth fixing element 640 is connected to the connecting post 113 and fixed by fasteners, thereby fixing the wire harness limiting seat inside the appliance housing.

[0082] This application has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Those skilled in the art will understand that many more variations and modifications can be made based on the teachings of this application, and all such variations and modifications fall within the scope of protection claimed in this application.

Claims

1. A charger with a cooling air guiding structure, characterized in that, The charger includes a housing with a charging position for charging a rechargeable battery unit. A charging electronic device unit is disposed inside the housing, and a cooling air guiding structure for dissipating heat from the charging electronic device unit is disposed inside the housing. The cooling air guiding structure includes a relatively enclosed guiding channel, and some charging electronic components of the charging electronic device unit are disposed in the guiding channel. The guiding channel is formed by connecting the housing and the cooling housing.

2. The charger according to claim 1, characterized in that, The cooling air guiding structure is located below the charging position.

3. The charger according to claim 1, characterized in that, The cooling air guiding structure further includes an air intake structure, which includes at least one air intake area, and the air intake area is disposed on at least one side of the cooling housing.

4. The charger according to claim 3, characterized in that, The cooling air guiding structure also includes an air outlet structure, which includes an air outlet area and the air inlet area are located on different sides of the cooling housing.

5. The charger according to claim 4, characterized in that, The cooling air guiding structure also includes a fan, which is located near the air outlet structure.

6. The charger according to claim 3, characterized in that, The appliance housing is provided with an air inlet near the air intake structure of the cooling housing, and the air inlet is located on the bottom wall of the appliance housing.

7. The charger according to claim 6, characterized in that, A support base is provided on the outer surface of the device housing, the support base protrudes from the bottom wall of the device housing, and the air inlet is exposed outside the device housing.

8. The charger according to claim 1, characterized in that, Some of the charging electronic components of the charging electronic device unit are disposed outside the cooling air guiding structure, and the charging electronic components disposed inside the guiding channel are isolated from the charging electronic components disposed outside the guiding channel.

9. The charger according to claim 8, characterized in that, The area within the guide channel is a high-voltage area, and the area outside the guide channel is a low-voltage area. The high-voltage area and the low-voltage area are isolated by an isolator.

10. The charger according to claim 9, characterized in that, Charging electronic components located in high-voltage areas are high-power charging electronic components, while charging electronic components located in low-voltage areas are low-power charging electronic components.

11. The charger according to claim 9, characterized in that, The shape of the isolation element is consistent with the shape of the junction between the high-pressure area and the low-pressure area.

12. The charger according to claim 1, characterized in that, The cooling housing is detachably connected to the bottom of the appliance housing.

13. The charger according to any one of claims 1 to 12, characterized in that, The charger also includes a second cooling air guiding structure for dissipating heat from the battery cells, the second cooling air guiding structure being disposed outside the guiding channel.

14. The charger according to claim 13, characterized in that, The number of the second cooling air guiding structures is matched with the number of charging positions.

15. The charger according to claim 13, characterized in that, The second cooling air guiding structure includes vents on the surface of the battery cell and a fan for exhausting hot air from the battery cell, the fan being positioned opposite the vents on the surface of the battery cell.

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