Charging module and charger

Abstract

The utility model provides a charging module and a charger, and the charging module comprises a circuit substrate which comprises a first surface and a second surface, and is provided with an isolation groove; the isolation piece is arranged on the circuit substrate and penetrates through the isolation groove, the isolation piece comprises an isolation part protruding out of the first surface of the circuit substrate, and the first surface is divided into a high-voltage area and a low-voltage area; the charging circuit is arranged on the circuit substrate, the charging circuit comprises an AD conversion circuit and a DD conversion circuit, the AD conversion circuit comprises a main control chip arranged in the high-voltage area, and the DD conversion circuit comprises a buck-boost chip arranged in the low-voltage area.

Description

Technical Field

[0001] This application relates to the field of charging technologies, and in particular, to a charging module and a charger. Background Art

[0002] A charger is a common household device in people's daily lives. Chargers are used for many household appliances such as mobile phones, computers, and wearable electronic devices.

[0003] Existing chargers have different styles and usage objects. However, most existing chargers use discrete components. In order to be compatible with multiple charging protocols, while ensuring powerful performance and minimizing the volume of the charger as much as possible, and improving the power density of the charger (that is, the charging power that can be output per unit volume), the high-voltage circuit layout and the low-voltage circuit layout in the charger are usually designed on different circuit boards, and the circuit boards are divided into two or more pieces. However, such a circuit board design has complex processes and difficult assembly, which is not conducive to the miniaturization design of the charger. Summary of the Invention

[0004] To solve the existing technical problems, this application provides a charging module and a charger with a single-board design that has simple processes, can reduce the assembly difficulty, and is conducive to maintaining the small volume of the charger.

[0005] In the first aspect of the embodiments of this application, a charging module is provided, including:

[0006] A circuit board, including a first surface and a second surface, and an isolation groove is provided on the circuit board;

[0007] An isolator, installed on the circuit board and passing through the isolation groove, the isolator includes an isolation portion protruding from the first surface of the circuit board, and a high-voltage area and a low-voltage area are separated and formed on the first surface;

[0008] A charging circuit, provided on the circuit board, the charging circuit includes an AD conversion circuit and a DD conversion circuit, the AD conversion circuit includes a main control chip provided in the high-voltage area, and the DD conversion circuit includes a buck-boost chip provided in the low-voltage area.

[0009] Optionally, the isolation portion includes a first section, a second section, and a third section, the first section extends along the width direction of the circuit board, and the second section and the third section extend from opposite ends of the first section in different directions respectively.

[0010] Optionally, in the length direction of the circuit board, the size of the low-voltage area is smaller than the size of the high-voltage area.

[0011] Optionally, the second section is perpendicular to the first section, and / or the third section is perpendicular to the first section.

[0012] Optionally, the AD conversion circuit includes a transformer disposed on the second surface, and an assembly reuse space for installing other circuit components is formed at an interval between the transformer and the second surface.

[0013] Optionally, the isolation member further includes a partition portion protruding from the second surface, and the transformer is disposed on the partition portion.

[0014] Optionally, the partition portion includes a support portion and a connecting portion. The support portion is disposed at an interval from the second surface, and the connecting portion is connected between the support portion and the second surface; the transformer is disposed on the support portion; and the isolation portion is connected to an end of the connecting portion away from the support portion.

[0015] Optionally, the transformer includes a plurality of pins passing through the circuit board and fixed by soldering. The solder joints corresponding to the pins are located in the high-voltage area and are arranged along the extending direction of the isolation portion.

[0016] Optionally, the DD conversion circuit includes an output interface disposed in the assembly reuse space, and the interface connection side of the output interface protrudes from the edge of the circuit board.

[0017] Optionally, the DD conversion circuit further includes a protocol chip disposed in the low-voltage area and corresponding to the position of the output interface; and / or, the AD conversion circuit includes an optocoupler, and the optocoupler is disposed in the high-voltage area and is arranged in parallel with the protocol chip.

[0018] Optionally, the height of the isolation portion protruding from the first surface is greater than or equal to 2.5 mm.

[0019] In a second aspect, a charger is further provided, including:

[0020] A housing, on which a charging port is provided;

[0021] The charging module provided in any embodiment of the present application, the charging module is received in the housing, and the output interface on the charging module is aligned with the charging port.

[0022] The charging module provided in the above embodiments includes a circuit board, an isolation groove provided on the circuit board, and an isolation member mounted on the circuit board. The isolation member divides the first surface of the circuit board into a high-voltage area and a low-voltage area. The main control chip in the AD conversion circuit for receiving an AC input power supply and converting it in the charging circuit can be arranged in the high-voltage area, and the buck-boost chip in the DD conversion circuit for converting the direct current converted by the AD conversion circuit into a charging output of a target magnitude can be arranged in the low-voltage area, so as to meet the safety distance when the linear distance between the high- and low-voltage components in the AD conversion circuit and the DD conversion circuit is relatively small. In this way, the AD conversion circuit and the DD conversion circuit can be arranged more compactly on the same circuit board, ensuring a small volume of the charger while maintaining strong performance. Moreover, the design of a single circuit board can eliminate complex processes and reduce the assembly difficulty.

[0023] In the above embodiments, the charger and the corresponding charging module embodiments belong to the same concept, and thus at least have the same technical effects as the charging module embodiments, which will not be elaborated here. Description of the Drawings

[0024] Figure 1 It is a front view of the first surface of the charging module in an embodiment.

[0025] Figure 2 It is a schematic diagram of the charging circuit in an embodiment.

[0026] Figure 3 It is a three-dimensional structural schematic diagram of the charging module in an embodiment.

[0027] Figure 4 It is a front view of the second surface of the charging module in an embodiment.

[0028] Figure 5 It is a structural schematic diagram of the charging module mounted on the base of the charger in an embodiment.

[0029] Figure 6 For Figure 5 It is a structural schematic diagram of the charging module after removing the transformer in

[0030] Figure 7 For Figure 5 It is a side view of the charging module mounted on the base of the charger in

[0031] Figure 8 It is a structural schematic diagram of the charger in an embodiment.

[0032] Description of Component Symbols

[0033] Charger 100, housing 10, charging port 131, charging module 20, circuit board 21, first surface 211, second surface 212, solder joint 213, AD conversion circuit 22, DD conversion circuit 23, isolation part 24, first section 241, second section 242, third section 243, partition part 25, support part 251, connection part 252, assembly reuse space 253, notch 254, isolation groove 26, high-voltage area 271, low-voltage area 272, AC input power supply 28, output interface 29;

[0034] Main control chip U2, buck-boost chip U3, protocol chip U5, transformer T1, optocoupler U1A / B. Specific implementation mode

[0035] The technical solution of the present invention will be further elaborated in detail below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0036] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the drawings. The described embodiments should not be regarded as limitations of the present application. All other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0037] In the following description, the expression "some embodiments" is used, which describes a subset of all possible embodiments. It should be noted that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0038] In the following description, the terms "first, second, third" are only used to distinguish similar objects, and do not represent a specific order for the objects. It can be understood that "first, second, third" can be interchanged with a specific order or sequence when allowed, so that the embodiments of the present application described here can be implemented in an order other than that illustrated or described here.

[0039] Please refer to Figure 1 and Figure 2 , a charging module provided by an embodiment of the present application, including a circuit board 21, including a first surface 211 and a second surface 212, and an isolation groove 26 is provided on the circuit board 21. An isolator 24 is mounted on the circuit board 21 and passes through the isolation groove 26. The isolator 24 includes an isolation part protruding from the first surface 211 of the circuit board 21, and a high-voltage area 271 and a low-voltage area 272 are separated and formed on the first surface 211. A charging circuit is provided on the circuit board 21. The charging circuit includes an AD conversion circuit 22 and a DD conversion circuit 23. The AD conversion circuit 22 includes a main control chip U2 provided in the high-voltage area 271, and the DD conversion circuit 23 includes a buck-boost chip U3 provided in the low-voltage area 272.

[0040] Among them, the spacer 24 is made of non-conductive materials such as plastic and rubber, and can be quickly installed on the circuit board 21 by being inserted into the isolation groove 26. The isolation part protrudes from the first surface 211 of the circuit board 21, so as to divide the space on the first surface 211 of the circuit board 21 into a high-voltage area 271 and a low-voltage area 272. In this way, the safety distance between the circuit devices in the high-voltage area 271 and the circuit devices in the low-voltage area 272 includes the distance that climbs along the height of the isolation part protruding from the first surface 211, so that the safety distance can be increased when the linear distance between the circuit devices is small. That is to say, through the cooperation structure of the spacer 24 and the isolation groove 26, while reducing the overall volume of the charging module, the requirements of the safety distance can also be met.

[0041] In the above embodiment, the space on the first surface 211 of the circuit board 21 is divided into a high-voltage area 271 and a low-voltage area 272 by using the spacer 24. The main control chip U2 in the AD conversion circuit 22 for receiving the AC input power supply 28 and converting it in the charging circuit can be arranged in the high-voltage area 271, and the buck-boost chip U3 in the DD conversion circuit 23 for converting the direct current converted by the AD conversion circuit 22 into a charging output of a target size can be arranged in the low-voltage area 272, so as to meet the safety distance when the linear distance between the high-voltage and low-voltage devices in the AD conversion circuit 22 and the DD conversion circuit 23 is small. In this way, the AD conversion circuit 22 and the DD conversion circuit 23 can be arranged more compactly on the same circuit board 21, ensuring strong performance while maintaining the small volume of the charger, and the design of a single circuit board 21 can eliminate complex processes and reduce the assembly difficulty.

[0042] In an optional example, the height of the isolation part protruding from the first surface 211 is greater than or equal to 2.5 mm, which can ensure a safety distance of at least 5-7 mm between the high-voltage area 271 and the low-voltage area 272 on the circuit board 21.

[0043] In some embodiments, the isolation part includes a first section 241, a second section 242, and a third section 243. The first section 241 extends along the width direction of the circuit board 21, and the second section 242 and the third section 243 extend from opposite ends of the first section 241 in different directions respectively. In an alternative specific example, the second section 242 and the third section 243 extend from the two ends of the first section 241 in opposite directions; the second section 242 is perpendicular to the first section 241, and / or the third section 243 is perpendicular to the first section 241. Among them, in the length direction of the circuit board 21, the size of the low-voltage area 272 is smaller than that of the high-voltage area 271. Specifically, the circuit board 21 includes width edges located at both ends and parallel to the first section 241. The low-voltage area 272 is located on the side with a smaller size between the first section 241 and the width edge of the circuit board 21, and the high-voltage area 271 is located on the side with a larger size between the first section 241 and the width direction of the circuit board 21. Among them, through the design of the second section 242 and the third section 243 that extend from opposite ends of the first section 241 in two opposite directions, the high-voltage area 271 and the low-voltage area 272 can include parts arranged side by side along the length direction of the circuit board 21 separated by the first section 241, parts arranged side by side along the width direction of the circuit board 21 separated by the second section 242, and parts arranged side by side along the width direction of the circuit board 21 separated by the third section 243 on the first surface 211 of the circuit board 21. In this way, it is more conducive to the layout optimization of high-voltage circuit devices and low-voltage circuit devices in the charging circuit. On the premise that the straight-line distance between high-voltage devices and low-voltage devices is small and the safety regulation distance requirements can be met, the layout flexibility on the same circuit board 21 is improved, further meeting the product miniaturization design requirements.

[0044] Optionally, please refer to Figures 3 to 7 , the AD conversion circuit 22 includes a transformer T1 disposed on the second surface 212. A mounting multiplexing space 253 for mounting other circuit components is formed at an interval between the transformer T1 and the second surface 212. Among them, the overhead design of the transformer T1 relative to the second surface 212 of the circuit board 21 forms the mounting multiplexing space 253 between the transformer T1 and the circuit board 21, which is equivalent to being able to reuse the surface area of the circuit board 21 corresponding to the area of the mounting multiplexing space 253 for the mounting of circuit devices in the charging circuit. Thus, it is beneficial to ensure a small volume of the charging module adapted to the charger while maintaining strong performance on the premise of the basic design of a single circuit board.

[0045] In some embodiments, the separator 24 further includes a partition portion 25 protruding from the second surface 212 of the circuit board 21, and the transformer T1 is disposed on the partition portion 25. Among them, the partition portion 25 is formed by the separator 24 disposed on the circuit board 21 through the isolation groove 26, and the partition portion 25 provides an overhead setting of the transformer T1 relative to the second surface 212 of the circuit board 21, which is beneficial to simplifying the overall structure of the charging module and reducing the assembly steps, and is also beneficial to the stability of the overall structure overheadly disposed above the second surface 212 of the circuit board 21 by the partition portion 25.

[0046] Optionally, the partition portion 25 includes a support portion 251 and a connecting portion 252. The support portion 251 is spaced from the second surface 212, and the connecting portion 252 is connected between the support portion 251 and the second surface 212; the transformer T1 is disposed on the support portion 251; the isolation portion is connected to one end of the connecting portion 252 away from the support portion 251. In this embodiment, the support portion 251 is in a flat plate shape, parallel and spaced from the circuit board 21, and the connecting portion 252 includes connecting side walls vertically extending from the opposite side edges of the support portion 251 to form an assembly reuse space 253 between the support portion 251 and the circuit board 21.

[0047] In some embodiments, the transformer T1 includes a plurality of pins passing through the circuit board 21 and welded and fixed. The solder joints 213 corresponding to the pins are located in the high-voltage area 271 and are arranged along the extending direction of the isolation portion. The pins of the transformer T1 are inserted into the circuit board 21 from the second surface 212 of the circuit board 21, pass through the circuit board 21 and are welded to the first surface 211. In the case of no partition portion 25, the length of the pins can also be increased, and the welding of the pins provides support for the overhead design of the transformer T1 directly relative to the second surface 212 of the circuit board 21, and the solder joints 213 of the pins on the first surface 211 can more conveniently realize the electrical connection between the input / output of the transformer T1 and other circuit devices disposed on the first surface 211 in the AD conversion circuit 22, thereby optimizing the circuit connection and making the performance more stable.

[0048] Optionally, the DD conversion circuit 23 includes an output interface 29 disposed within the assembly reuse space 253. The interface connection side of the output interface 29 protrudes from the edge of the circuit board 21. The interface connection side is the side where the output interface 29 is connected to an external data line connector. The DD conversion circuit 23 further includes a protocol chip U5 disposed within the low-voltage area 272 and corresponding to the position of the output interface 29. Among them, the support portion 251 is provided with a notch 254 on the side close to the edge of the circuit board 21. The notch 254 is located between the connecting sidewalls. The output interface 29 is disposed at the notch 254 and the interface connection side protrudes from the edge of the circuit board 21. The design of the notch 254 is more conducive to the setting of the output interface 29 within the assembly reuse space 253 to reduce the overall thickness. The height of the assembly reuse space 253 is approximately equal to the thickness of the output interface 29. When the transformer T1 is disposed on the support portion 251, the surface of the transformer T1 in contact with the support portion 251 is also in contact with the surface of the output interface 29. In an optional example, the output interface 29 is a type-c interface. The protocol chip U5 and the output interface 29 are respectively located on the first surface 211 and the second surface 212 of the circuit board 21, and the positions of the protocol chip U5 and the output interface 29 are directly opposite. Electrical connection can be achieved through the plug-in welding method. The protocol chip U5 has the ability to detect devices and identify cables. By the feedback of detection signals, it can judge the insertion state of the electronic device to be charged and whether the charging cable is normally connected, and can automatically adjust the magnitude of the charging output voltage and current according to the needs of the electronic device to be charged to ensure the safety and stability of charging. If an abnormal situation occurs in the electronic device to be charged or the cable, the protocol chip U5 will take protection measures in time to prevent the device from being damaged. In this embodiment, the protocol chip U5 can determine the charging protocol adapted to the corresponding connected electronic device to be charged according to the charging type supported by the electronic device to be charged currently connected to the output interface 29. The charging module outputs a DC output voltage of a target magnitude through the output interface 29 according to the adapted charging protocol to charge the electronic device to be charged.

[0049] In some embodiments, the AD conversion circuit 22 includes optocouplers U1A / B; the optocouplers U1A / B are disposed in the high-voltage area 271 and are arranged side by side with the protocol chip U5. The optocouplers U1A / B and the main control chip U2 are both located in the high-voltage area 271. The optocouplers U1A / B collect the output current information of the output interface 29 to form a feedback signal and feed it back to the main control chip U2. Among them, the protocol chip U5 controls the magnitude of the DC output voltage of the output interface 29 according to the type of the charging protocol adapted to the electronic device to be charged currently plugged into the output interface 29 and different charging stages. It can collect the output current information through a sampling resistor, form a feedback signal according to the output current information, and feed it back to the main control chip U2 through the optocouplers U1A / B, so that the main control chip U2 adjusts the output voltage according to the feedback signal to control the output current. In this way, the protocol chip U5 can provide corresponding power in different fast-charging stages, ensure the stable operation of fast charging, and provide a better fast-charging experience. The optocouplers U1A / B, as high-voltage components with a relatively large volume in the AD conversion circuit 22, are arranged side by side with the protocol chip U5. Specifically, the optocouplers U1A / B and the protocol chip U5 are disposed on opposite sides of the second section 242 of the isolation part, and are arranged approximately flush and spaced along the width direction of the circuit board 21.

[0050] The charging module provided by the embodiment of the present application has at least the following characteristics:

[0051] First, the charging circuit is integrally disposed on a single circuit board 21. An isolation groove 26 is provided on the circuit board 21, and the space on the surface of the circuit board 21 is divided into a high-voltage area 271 and a low-voltage area 272 by an isolator 24 installed in the isolation groove 26, so as to increase the safety distance between the high-voltage area 271 and the low-voltage area 272. On the premise of ensuring electrical safety, the assembly of circuit components on the circuit board 21 can be made more compact, and the surface area required for assembling all circuit components in the charging circuit on a single circuit board 21 can be minimized as much as possible.

[0052] Second, the transformer T1 is elevated relative to the circuit board 21, so as to form an assembly reuse space 253 for other circuit components between the transformer T1 and the circuit board 21. In this way, within the area on the circuit board 21 for assembling the transformer T1, the circuit components can be stacked, which is further conducive to reducing the size of the surface area required for assembling all circuit components in the charging circuit. On the premise of ensuring that the size of a single circuit board 21 can be compatible with the size of existing chargers, the assembly of all circuit components in the charging circuit can be completed.

[0053] Thirdly, the bent shape of the isolation part 24 enables the high-voltage area 271 and the low-voltage area 272 to form parts arranged side by side along the length direction of the circuit board 21 on the first surface 211 of the circuit board 21, and also includes parts arranged side by side along the width direction of the circuit board 21, which is more conducive to the layout optimization of high-voltage circuit devices and low-voltage circuit devices in the charging circuit. On the premise that the straight-line distance between the high-voltage circuit devices and the low-voltage circuit devices is small and the safety distance requirements can be met, the layout flexibility on the same circuit board 21 is improved.

[0054] Please refer to Figure 8 , on the other hand, this application also provides a charger 100, which includes: a housing 10 with a charging port 131 provided thereon; the charging module 20 in any embodiment of this application, the charging module 20 is housed in the housing 10, and the output interface 29 on the charging module 20 is aligned with the charging port 131.

[0055] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application can easily think of changes or substitutions, which should all be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A charging module, characterized in that, Comprising: A circuit board, including a first surface and a second surface, with isolation grooves provided on the circuit board; An isolator, installed on the circuit board and passing through the isolation grooves, the isolator including an isolation portion protruding from the first surface of the circuit board, separating and forming a high-voltage area and a low-voltage area on the first surface; A charging circuit, provided on the circuit board, the charging circuit including an AD conversion circuit and a DD conversion circuit, the AD conversion circuit including a main control chip provided in the high-voltage area, and the DD conversion circuit including a buck-boost chip provided in the low-voltage area.

2. The charging module according to claim 1, wherein The isolation portion includes a first segment, a second segment, and a third segment, the first segment extending along the width direction of the circuit board, and the second segment and the third segment extending from opposite ends of the first segment in different directions respectively.

3. The charging module according to claim 2, wherein In the length direction of the circuit board, the size of the low-voltage area is smaller than the size of the high-voltage area.

4. The charging module according to claim 2, wherein, The second segment is perpendicular to the first segment, and / or the third segment is perpendicular to the first segment.

5. The charging module according to claim 1, wherein The AD conversion circuit includes a transformer provided on the second surface, and an assembly reuse space for installing other circuit components is formed at an interval between the transformer and the second surface.

6. The charging module according to claim 5, wherein, The isolator further includes a separation portion protruding from the second surface, and the transformer is installed on the separation portion.

7. The charging module according to claim 6, wherein The separation portion includes a support portion and a connecting portion, the support portion is disposed at an interval from the second surface, and the connecting portion is connected between the support portion and the second surface; The transformer is installed on the support portion; The isolation portion is connected to one end of the connecting portion away from the support portion.

8. The charging module according to claim 6, wherein, The transformer includes a plurality of pins passing through the circuit board and fixed by soldering, and the solder joints corresponding to the pins are located in the high-voltage area and arranged along the extending direction of the isolation portion.

9. The charging module according to claim 6, wherein The DD conversion circuit includes an output interface provided in the assembly reuse space, and the interface connection side of the output interface protrudes from the edge of the circuit board.

10. The charging module according to claim 9, wherein The DD conversion circuit further includes a protocol chip provided in the low-voltage area and corresponding to the position of the output interface; and / or the AD conversion circuit includes an optocoupler, and the optocoupler is provided in the high-voltage area and arranged in parallel with the protocol chip.

11. The charging module according to any one of claims 1 to 10, characterized in that, The height of the isolation portion protruding from the first surface is greater than or equal to 2.5 mm.

12. A charger, characterized in that, Comprising: A housing, with a charging port provided on the housing; The charging module according to any one of claims 1 to 11, the charging module is received in the housing, and the output interface on the charging module is aligned with the charging port.

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