Charging device

Abstract

The utility model provides a charging device, and relates to the technical field of charging devices. The first circuit board is arranged on the shell and comprises a first step-down circuit; the power connector is electrically connected with the input end of the first step-down circuit and used for being electrically connected with energy storage equipment and receiving first voltage of the energy storage equipment, and the first step-down circuit can reduce the first voltage into second voltage; the second circuit board comprises a second step-down circuit and a first fast charging socket, the input end of the second step-down circuit is electrically connected with the output end of the first step-down circuit, the second voltage of the first step-down circuit can be reduced to third voltage, and the first fast charging socket is connected with the output end of the second step-down circuit; and the first fast charging jack is also used for being connected with an electric load so as to charge the electric load. According to the charging device provided by the utility model, secondary voltage reduction is carried out on the high voltage input to the power supply connector, so that the situation that overlarge current flows into an electric load is avoided, and the safety of the electric load is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of charging devices, and in particular to a charging device. Background Art

[0002] Currently, the most common chargers on the market are usually chargers that connect to AC mains power. This type of charger usually adopts a one-stage step-down design with a large step-down span. Under certain special circumstances, excessive current can easily flow into the power load, thereby posing the problem of burning the power load. Utility Model Content

[0003] The utility model aims to solve the technical problem in the prior art or related art that a charging device is prone to burn out an electrical load.

[0004] The utility model provides a charging device.

[0005] The charging device provided by the present invention includes: a shell; a first circuit board, which is arranged in the shell, and the first circuit board includes a first step-down circuit; a power connector, which is electrically connected to the input end of the first step-down circuit, and is used to electrically connect to an energy storage device and receive a first voltage of the energy storage device, and the first step-down circuit can reduce the first voltage to a second voltage; a second circuit board, which includes a second step-down circuit and a first fast charging socket, and the input end of the second step-down circuit is electrically connected to the output end of the first step-down circuit, and can reduce the second voltage of the first step-down circuit to a third voltage, the first fast charging socket is connected to the output end of the second step-down circuit, and the first fast charging socket is also used to connect to an electrical load to charge the electrical load.

[0006] The charging device provided by the present invention includes a housing, a first circuit board, a power connector, and a second circuit board. The first circuit board is disposed within the housing and includes a first step-down circuit, which includes a first step-down chip for performing a primary step-down operation on the circuit. The power connector is electrically connected to the input of the first step-down circuit for connecting to an external energy storage device to provide power to the entire circuit. The second circuit board includes a second step-down circuit and a first fast-charging socket. The second step-down circuit is electrically connected to the output of the first step-down circuit and includes a second step-down chip for performing a secondary step-down operation. The first fast-charging socket is connected to the output of the second step-down circuit for charging an electrical load. The charging device of the present invention performs a secondary step-down operation on the high voltage input to the power connector. Even if the first step-down circuit experiences a voltage reduction delay, the second step-down circuit can further reduce the voltage, thereby preventing excessive current from flowing into the electrical load, thereby ensuring the safety of the electrical load. Even if either the first step-down chip or the second step-down chip experiences a voltage reduction delay, the electrical load is protected from being burned. In addition, the two step-down circuits are arranged on two different circuit boards, which has a good heat dissipation effect and avoids the problem of overheating caused by excessive concentration of chips.

[0007] In some technical solutions, optionally, the voltage provided by the energy storage device is greater than or equal to 48V, that is, the first voltage is greater than or equal to 48V, so that the voltage received by the power connector is greater than or equal to 48V, so that the voltage is reduced to 31V through the first step-down chip, that is, the second voltage is 31V. Of course, according to different actual conditions, different parameters can also be selected for the second voltage, for example, any voltage between 20V and 40V is acceptable, and then the voltage is reduced to the voltage required by the electrical load through the second step-down circuit.

[0008] In some technical solutions, optionally, the second buck circuit includes a second buck chip, and the charging device further includes a control chip electrically connected to the second buck chip for adjusting the output voltage of the second buck chip.

[0009] In this technical solution, the output voltage of the second step-down chip is adjusted by the control chip, which can be applied to different specifications of electrical loads. Optionally, the output voltage and current of the second step-down chip can be 5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, 20V / 5A, and 28V / 5A.

[0010] In some technical solutions, optionally, the control chip is set on the second step-down circuit.

[0011] In this technical solution, the control chip is arranged on the second buck circuit, which can make the signal transmission efficiency between the control chip and the second buck chip faster.

[0012] In some technical solutions, optionally, the control chip and the second step-down chip are integrated into the same chip.

[0013] In this technical solution, the control chip and the second step-down chip are integrated into the same chip, making the overall volume of the device smaller. Of course, the control chip and the second step-down chip can also be different chips, so that their respective heat dissipation effects are good.

[0014] In some technical solutions, optionally, the second step-down circuit includes a second step-down chip, and the charging device also includes a control chip electrically connected to the second step-down chip for controlling the output voltage of the second step-down chip; wherein, the second circuit board also includes a third step-down circuit, the third step-down circuit is connected in parallel with the second step-down circuit, the third step-down circuit includes a third step-down chip and a second fast charging socket, the first fast charging socket is a Type-C interface, and the second fast charging socket is a USB interface.

[0015] In this technical solution, the second circuit board also includes a third step-down circuit, which is connected to the first step-down circuit, and the third step-down circuit is connected in parallel with the second step-down circuit. The third step-down circuit includes a third step-down chip and a second fast charging socket. The charging device of the utility model is equipped with two fast charging circuits at the same time, and the two fast charging circuits are connected in parallel. One can adjust the output voltage through the control chip and is suitable for the Type-C interface, and the other can output a fixed voltage and is suitable for the USB interface, so that the charging device of the utility model can match different types of power loads at the same time.

[0016] In some technical solutions, optionally, the second step-down circuit further includes a communication chip for realizing information transmission between the charging device and the electrical load.

[0017] In this technical solution, information transmission between the charging device and the electrical load can be achieved through a communication chip, thereby achieving rapid charging of the electrical load.

[0018] In some technical solutions, optionally, the first buck circuit further includes a switch device for controlling on-off between the first buck circuit and the second buck circuit.

[0019] In this technical solution, a switching device is provided on the first step-down circuit, so that the on-off between the first step-down circuit and the second step-down circuit can be controlled by the switching device, so that when charging is not required, the signal transmission between the first step-down circuit and the second step-down circuit can be cut off, avoiding unnecessary safety hazards.

[0020] In some technical solutions, optionally, the first circuit board includes a first fixed plate, the second circuit board includes a second fixed plate, the first fixed plate and the second fixed plate are arranged at intervals in the shell, the first step-down circuit is arranged on the side of the first fixed plate away from the second fixed plate, and the second step-down circuit is arranged on the side of the second fixed plate away from the first fixed plate.

[0021] In this technical solution, the first and second step-down circuits are positioned away from each other to improve heat dissipation. Of course, the first and second fixing plates can also be the same fixing plate, with the first and second step-down circuits positioned on either side of the fixing plate. This approach saves one fixing plate, improving assembly efficiency. The advantage of having two fixing plates is that the first and second step-down circuits can be positioned away from each other, improving heat dissipation.

[0022] In some technical solutions, optionally, the shell includes: an enclosure with openings at both ends; a front plate covering one opening of the enclosure; a rear plate covering the other opening of the enclosure, and the first circuit board and the second circuit board are arranged in the enclosure.

[0023] In this technical solution, the enclosure, front plate and rear plate form the shell of the entire charging device. The first circuit board is arranged on the front plate, and the second circuit board is arranged on the rear plate, thereby increasing the distance between the first circuit board and the second circuit board, thereby improving the heat dissipation effect.

[0024] In some technical solutions, optionally, a relief hole is provided on the front panel, and the charging device further includes a connecting wire, one end of which is connected to the input end of the first step-down circuit, and the other end passes through the relief hole and is connected to the power connector.

[0025] In this technical solution, by providing a connecting line, the charging device of the utility model can be more conveniently assembled with the energy storage device, thereby increasing the charging distance.

[0026] In some technical solutions, optionally, the shell further includes a partition, which forms a wire storage cavity with the enclosure, and the connecting wire can be hidden in the wire storage cavity.

[0027] In this technical solution, a wire storage cavity is also provided in the shell, so that when charging is not needed, the connecting wire can be hidden in the wire storage cavity, thereby preventing the connecting wire from being exposed to the outside for a long time and being damaged.

[0028] In some technical solutions, optionally, a snap-fit portion is provided on the front panel, and a matching portion is provided on the power connector, and the snap-fit portion can cooperate with the matching portion to fix the power connector on the front panel.

[0029] In this technical solution, when charging is not needed, the power connector is fixed to the front panel through the engagement of the locking portion and the matching portion. This not only makes the overall appearance more beautiful, but also prevents the power connector from moving around and damaging the power cord.

[0030] In some technical solutions, the enclosure plate can optionally be an aluminum alloy plate. Aluminum alloy plates have good heat dissipation effects, thereby improving the heat dissipation efficiency of the first and second circuit boards. In addition, aluminum alloy plates also have a certain degree of compressive strength.

[0031] In some technical solutions, optionally, both the front plate and the back plate are composite plates.

[0032] In this technical solution, both the front and back panels are composite panels, such as PC (Polycarbonate)-ABS (Acrylonitrile Butadiene Styrene). PC-ABS composite panels have excellent impact resistance, meaning they are not easily damaged even in the event of an accidental drop or collision. PC-ABS composite panels also have good heat resistance. Since a certain amount of heat is generated during the charging process, the PC-ABS composite panel can withstand higher temperatures without deformation, ensuring the safe and stable operation of the charger.

[0033] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0035] Figure 1 A circuit diagram showing a related charging device;

[0036] Figure 1 The corresponding relationship between the reference numerals and component names is as follows:

[0037] 23' first step-down chip, 24' protocol chip, 25' second step-down chip, 262' Type-C1 interface, 264' Type-C2 interface, 27' USB interface, 28' communication chip, 29' MCU chip.

[0038] Figure 2 An exploded view of the charging device of the present invention is shown;

[0039] Figure 3 Shows a circuit diagram of the charging device of the present utility model;

[0040] Figure 4 Shows one of the structural schematic diagrams of the charging device of the present utility model;

[0041] Figure 5 The second structural diagram of the charging device of the present invention is shown;

[0042] Figure 6 The third structural diagram of the charging device of the present invention is shown;

[0043] Figure 7 The fourth structural diagram of the charging device of the present invention is shown;

[0044] Figure 8 A structural diagram showing the power connector and connecting wires of the charging device of the present invention is shown;

[0045] Figure 9 An end view of the power connector of the charging device of the present invention is shown;

[0046] Figure 10 Shows an assembly diagram of the charging device and energy storage device of the utility model;

[0047] Figure 11 A schematic structural diagram of an energy storage device assembled with the charging device of the present invention is shown;

[0048] Figure 12 The fifth structural diagram of the charging device of the present invention is shown;

[0049] Figure 13 The sixth structural diagram of the charging device of the present invention is shown.

[0050] Figures 2 to 13 The corresponding relationship between the reference numerals and component names is as follows:

[0051] 1 Charging device, 11 Housing, 112 Enclosure, 114 Front plate, 1142 Engaging portion, 116 Rear plate, 117 Partition, 118 Avoidance through-hole, 119 Line storage cavity, 12 First circuit board, 122 First step-down circuit, 1222 First step-down chip, 124 First fixing plate, 14 Power connector, 1402 Matching portion, 15 Connecting wire, 16 Second circuit board, 162 Second step-down circuit, 1622 Second step-down chip, 1624 Control chip, 1626 First fast charging socket, 164 Second fixing plate, 172 Third step-down circuit, 1722 Third step-down chip, 1724 Second fast charging socket, 182 Power load, 192 Communication chip, 194 Switching device, 196 Microcontroller unit, 2 Energy storage device. DETAILED DESCRIPTION

[0052] In order to more clearly understand the above aspects, features and advantages of the embodiments of the present invention, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other unless there is a conflict.

[0053] In the following description, many specific details are set forth to facilitate a full understanding of the embodiments of the present invention. However, the embodiments of the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the embodiments of the present invention is not limited to the specific embodiments disclosed below.

[0054] like Figure 2 、 Figure 3 、 Figure 10 、 Figure 11 and Figure 12 As shown, the charging device 1 provided by the present invention includes: a shell 11; a first circuit board 12, which is arranged in the shell 11, and the first circuit board 12 includes a first step-down circuit 122; a power connector 14, which is electrically connected to the input end of the first step-down circuit 122, used to electrically connect the energy storage device 2 and receive the first voltage of the energy storage device 2, and the first step-down circuit 122 can reduce the first voltage to a second voltage; a second circuit board 16, including a second step-down circuit 162 and a first fast charging socket 1626, the input end of the second step-down circuit 162 is electrically connected to the output end of the first step-down circuit 122, and can reduce the second voltage of the first step-down circuit 122 to a third voltage, the first fast charging socket 1626 is connected to the output end of the second step-down circuit 162, and the first fast charging socket 1626 is also used to connect to the power load 182 to charge the power load 182.

[0055] The charging device 1 provided by the present invention includes a shell 11, a first circuit board 12, a power connector 14 and a second circuit board 16. The first circuit board 12 is arranged in the shell 11. The first circuit board 12 includes a first step-down circuit 122. The first step-down circuit 122 includes a first step-down chip 1222. The first step-down chip 1222 is used to perform a first-level step-down on the circuit; the power connector 14 is electrically connected to the input end of the first step-down circuit 122, and is used to connect an external energy storage device 2, thereby providing power for the entire circuit. The second circuit board 16 includes a second step-down circuit 162 and a first fast charging socket 1626. The second step-down circuit 162 is electrically connected to the output end of the first step-down circuit 122. The second step-down circuit 162 includes a second step-down chip 1622. The second step-down chip 1622 is used for secondary step-down. The first fast charging socket 1626 is connected to the output end of the second step-down circuit 162, and is used to charge the power load 182. The charging device 1 of the present invention performs a two-stage voltage reduction on the high voltage input to the power connector 14, preventing excessive current from flowing into the power load 182. This ensures the safety of the power load 182. Even if a voltage reduction delay occurs in either the first or second step-down chip 1222, 1622, the power load 182 will not be damaged. Furthermore, the two step-down circuits are located on separate circuit boards, providing excellent heat dissipation and preventing overheating caused by excessive chip concentration. The overall dimensions of the housing 11 are 105 mm long, 70 mm wide, and 38 mm high.

[0056] In some embodiments, the energy storage device 2 of the present invention can be a balcony photovoltaic energy storage device. Balcony photovoltaic energy storage devices are typically installed on a balcony or in a home's courtyard, using sunlight to generate electricity to power various household appliances. Specifically, the balcony photovoltaic energy storage device can be connected to a photovoltaic panel, where the photovoltaic effect of the panel generates electricity to charge the balcony photovoltaic energy storage device. It can also be connected to the mains electricity supply, which can also charge the balcony photovoltaic energy storage device. The balcony energy storage device also has an AC output port that can be plugged into a household power outlet to power various AC loads in the home. Balcony photovoltaic energy storage equipment is usually small in size and has good mobility. Therefore, it can be moved to other power consumption scenarios according to user needs. For example, it can be used as an outdoor portable energy storage device. The balcony energy storage device of the present invention also provides a 48V or 36V DC output interface. Through the charging device 1 provided by the present invention, 48V or 36V DC can be converted into DC of other voltage values to charge various electronic devices. For example, it can charge mobile phones, notebooks, tablets, drones and other electronic devices. Through the charging device 1 of the present invention, 48V or 36V DC can be converted into 5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, 20V / 5A or 28V / 5A for charging. Of course, the voltage provided by the energy storage device 2 is not limited to 48V or 36V, and can also be greater than or equal to 48V, that is, the first voltage is greater than or equal to 48V, so that the voltage received by the power connector 14 is greater than or equal to 48V, and the voltage is reduced to 31V by the first step-down chip 1222, that is, the second voltage is 31V. Of course, according to different actual conditions, different parameters can also be selected for the second voltage, for example, any voltage between 20V and 40V is acceptable, and then the voltage is reduced to the voltage required by the electrical load 182 by the second step-down circuit 162.

[0057] In some technical solutions, optionally, as Figure 3 As shown, the second buck circuit 162 includes a second buck chip 1622 , and the charging device 1 further includes a control chip 1624 electrically connected to the second buck chip 1622 for adjusting the output voltage of the second buck chip 1622 .

[0058] In this technical solution, the output voltage of the second step-down chip 1622 is adjusted by the control chip 1624, so that it can be applied to different specifications of the electrical load 182. Optionally, the output voltage and current of the second step-down chip 1622 can be 5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, 20V / 5A, and 28V / 5A.

[0059] In some technical solutions, optionally, the charging device 1 further includes an MCU.

[0060] In some technical solutions, optionally, the control chip 1624 is set on the second buck circuit 162 .

[0061] In this technical solution, the control chip 1624 is disposed on the second buck circuit 162 , which can make the signal transmission efficiency between the control chip 1624 and the second buck chip 1622 faster.

[0062] In some technical solutions, optionally, as Figure 3 As shown, the control chip 1624 and the second step-down chip 1622 are integrated into the same chip.

[0063] In this technical solution, the control chip 1624 and the second step-down chip 1622 are integrated into the same chip, making the overall size of the device smaller. Of course, the control chip 1624 and the second step-down chip 1622 can also be different chips, so that their respective heat dissipation effects are good.

[0064] In some technical solutions, optionally, the second step-down circuit 162 includes a second step-down chip 1622, and the charging device 1 also includes a control chip 1624, which is electrically connected to the second step-down chip 1622 and is used to control the output voltage of the second step-down chip 1622; wherein, the second circuit board 16 also includes a third step-down circuit 172, the third step-down circuit 172 is connected in parallel with the second step-down circuit 162, the third step-down circuit 172 includes a third step-down chip 1722 and a second fast charging socket 1724, the first fast charging socket 1626 is a Type-C interface, and the second fast charging socket 1724 is a USB interface.

[0065] In this technical solution, the second circuit board 16 also includes a third step-down circuit 172, which is connected to the first step-down circuit 122, and the third step-down circuit 172 is connected in parallel with the second step-down circuit 162. The third step-down circuit 172 includes a third step-down chip 1722 and a second fast charging socket 1724. The charging device 1 of the present invention is equipped with two fast charging circuits at the same time, and the two fast charging circuits are connected in parallel. One can adjust the output voltage through the control chip 1624 and is suitable for the Type-C interface, and the other can output a fixed voltage and is suitable for the USB interface, so that the charging device 1 of the present invention can match different types of power loads 182 at the same time.

[0066] In some technical solutions, optionally, the second step-down circuit 162 further includes a communication chip 192 for implementing information transmission between the charging device 1 and the electrical load 182 .

[0067] In this technical solution, information transmission between the charging device 1 and the electrical load 182 can be achieved through the communication chip 192, thereby achieving rapid charging of the electrical load 182.

[0068] In some technical solutions, optionally, as Figure 7 As shown, the first buck circuit 122 further includes a switch device 194 for controlling the on / off between the first buck circuit 122 and the second buck circuit 162 .

[0069] In this technical solution, a switching device 194 is provided on the first buck circuit 122, so that the on-off between the first buck circuit 122 and the second buck circuit 162 can be controlled by the switching device 194, so that when charging is not required, the signal transmission between the first buck circuit 122 and the second buck circuit 162 can be cut off to avoid unnecessary safety hazards.

[0070] In some technical solutions, optionally, as Figure 12 As shown, the first circuit board 12 includes a first fixing plate 124, the second circuit board 16 includes a second fixing plate 164, the first fixing plate 124 and the second fixing plate 164 are arranged at intervals in the shell 11, the first step-down circuit 122 is arranged on the side of the first fixing plate 124 away from the second fixing plate 164, and the second step-down circuit 162 is arranged on the side of the second fixing plate 164 away from the first fixing plate 124.

[0071] In this technical solution, the first step-down circuit 122 and the second step-down circuit 162 are arranged away from each other, which can improve the heat dissipation effect. Of course, the first fixing plate 124 and the second fixing plate 164 can also be the same fixing plate, and the first step-down circuit 122 and the second step-down circuit 162 are arranged on both sides of the fixing plate. The advantage of doing so is that one fixing plate can be saved, thereby improving assembly efficiency. The advantage of setting two fixing plates is that the first step-down circuit 122 and the second step-down circuit 162 can be kept away from each other, thereby improving the heat dissipation effect. Of course, you can also choose Figure 13 In the installation manner shown, the second circuit board 16 is disposed on the first circuit board 12 , which makes it easier to assemble the two.

[0072] In some technical solutions, optionally, as Figure 4 、 Figure 5 and Figure 6 As shown, the shell 11 includes: a panel 112 with openings at both ends; a front plate 114 covering one opening of the panel 112; a rear plate 116 covering the other opening of the panel 112, and the first circuit board 12 and the second circuit board 16 are arranged in the panel 112.

[0073] In this technical solution, the enclosure 112, the front plate 114 and the rear plate 116 form the shell 11 of the entire charging device 1. The first circuit board 12 is arranged on the front plate 114, and the second circuit board 16 is arranged on the rear plate 116, thereby increasing the distance between the first circuit board 12 and the second circuit board 16, thereby improving the heat dissipation effect.

[0074] In some technical solutions, optionally, as Figure 8 、 Figure 9 and Figure 12 As shown, a through hole 118 is provided on the front plate 114, and the charging device 1 further includes a connecting wire 15, one end of which is connected to the input end of the first step-down circuit 122, and the other end passes through the through hole 118 and is connected to the power connector 14. Figure 8 In the figure, 900±15 and 100±5 correspond to lengths in millimeters.

[0075] In this technical solution, by providing the connecting line 15 , the charging device 1 of the present invention can be more conveniently assembled with the energy storage device 2 , thereby increasing the charging distance.

[0076] In some technical solutions, optionally, as Figure 12 As shown, the housing 11 further includes a partition 117 , which forms a wire storage cavity 119 together with the enclosure 112 , and the connecting wire 15 can be hidden in the wire storage cavity 119 .

[0077] In this technical solution, a wire storage cavity 119 is further provided in the housing 11, so that when charging is not required, the connecting wire 15 can be hidden in the wire storage cavity 119, thereby preventing the connecting wire 15 from being exposed to the outside for a long time and being damaged.

[0078] In some technical solutions, optionally, as Figure 12 As shown, a locking portion 1142 is provided on the front plate 114 , and a matching portion 1402 is provided on the power connector 14 . The locking portion 1142 can match with the matching portion 1402 to fix the power connector 14 on the front plate 114 .

[0079] In this technical solution, when charging is not needed, the power connector 14 is fixed to the front plate 114 by cooperating with the locking portion 1142 and the matching portion 1402. On the one hand, it makes the overall appearance more beautiful, and on the other hand, it can prevent the power connector 14 from moving around and damaging the power cord.

[0080] In some technical solutions, the enclosure 112 is optionally an aluminum alloy plate. Aluminum alloy plates have good heat dissipation effects, thereby improving the heat dissipation efficiency of the first circuit board 12 and the second circuit board 16. In addition, aluminum alloy plates also have a certain compressive strength.

[0081] In some technical solutions, optionally, the front plate 114 and the back plate 116 are both PC)-ABS composite plates.

[0082] In this technical solution, both the front plate 114 and the rear plate 116 are composite plates, such as PC-ABS composite plates. PC-ABS composite plates have excellent impact resistance, meaning they are not easily damaged even in the event of an accidental drop or collision. PC-ABS composite plates also have good heat resistance. Since a certain amount of heat is generated during the charging process, the PC-ABS composite plates can withstand higher temperatures without deformation, ensuring the safe and stable operation of the charger.

[0083] Another embodiment of the present invention provides a charging device 1 .

[0084] The first thing you need to know is that the PD3.1 fast charging module cleverly combines household energy storage power with consumer portable digital charging heads, which can achieve fast charging for high-power digital products and laptops, covering most digital product usage scenarios.

[0085] The conventional charging device has a structure such as Figure 1 As shown, the entire circuit structure includes two first buck chips 23', a second buck chip 25', two protocol chips 24', two Type-C interfaces, a USB interface 27', a communication chip 28' and an MCU chip 29'. The two first buck chips 23' and the second buck chip 25' are connected to the mobile energy storage device. The two first buck chips 23' are respectively connected to a protocol chip 24'. The protocol chip 24' is used to adjust the output voltage of the first buck chip 23'. Two Type-C interfaces and one USB interface 27' are also provided. In this circuit design, since the output voltage of the mobile energy storage device is usually greater than 48V, through the first-level buck method, when certain special circumstances occur, excessive current can easily flow into the power load through the charging cable, thereby burning the power load.

[0086] Based on the problem that current charging devices are easily burned by electrical loads, such as Figure 3As shown, the charging device 1 provided by the present invention includes a first buck chip 1222, two second buck chips 1622, a third buck chip 1722, two first fast charging sockets 1626, two second fast charging sockets 1724, a communication chip 192 and an MCU chip. The charging device 1 of the present invention, when receiving a 48V voltage at the left end, the first buck chip 1222 can step down the voltage to 31V, and then the second buck chip 1622 steps down the voltage to the standard voltage and current for use with PD3.1, Type-C1 sockets and PD3.1, Type-C2 sockets. For example, 5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, 20V / 5A and 28V / 5A. In this circuit, the second buck chip 1622 can be an integrated chip and also integrated with a control chip, so that the output voltage of the second buck chip 1622 can be adjusted to suit different power loads 182. The third step-down chip 1722 can output a fixed voltage, such as 5V, so that the charging device 1 of the present invention can be applied to different types of electrical loads 182. The circuit board of the charging device 1 of the present invention is small in size and suitable for miniaturization.

[0087] Among them, the Type-C1 interface can output 5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, 20V / 5A and 28V / 5A DC, the Type-C2 interface can output 5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, 20V / 5A and 28V / 5A DC, the USB can output 5V / 2.4A DC, the Type-C1 interface and Type-C2 interface can output a maximum of 140W when used single-ended, of course Dual interfaces can be used at the same time. When used at the same time, considering the safety of the device, the maximum output power of the two interfaces is 65W each. When the Type-C1 interface and USB are used at the same time, the maximum output power is 140W+12W. When the Type-C2 interface and USB are used at the same time, the maximum output power is 140W+12W. When the Type-C1 interface, Type-C2 interface and USB are used at the same time, the maximum output power is 65W+65W+12W. When USB is used alone, the maximum output power is 12W.

[0088] The improved charging device 1 of the utility model adopts a two-level voltage reduction, which can avoid the risk of burning the external power load 182. It can effectively and cleverly integrate the household energy storage power supply with the consumer portable digital charging head to achieve fast charging for high-power digital products and laptops, etc., and can cover most digital product usage scenarios. The Type-C1 interface, Type-C2 interface and USB interface all output DC power, with a high charging efficiency of up to 95%, realizing charging of high-power digital products.

[0089] In the embodiments according to the present invention, the terms "first", "second", and "third" are used only for descriptive purposes and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. Terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the embodiments according to the present invention can be understood according to specific circumstances.

[0090] In addition, although each operation is described in a specific order, this should be understood as requiring such operation to be performed in the specific order or in a sequential order, or requiring that all illustrated operations should be performed to obtain desired results. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details have been included in the above discussion, these should not be interpreted as limiting the scope of the present invention. Some features described in the context of a separate embodiment can also be implemented in a single implementation in combination. On the contrary, the various features described in the context of a single implementation can also be implemented in multiple implementations individually or in any suitable sub-combination.

[0091] Although the subject matter has been described in the language of specific structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

[0092] The above are only preferred embodiments of the present invention and are not intended to limit the embodiments of the present invention. For those skilled in the art, various modifications and variations can be made to the embodiments of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the embodiments of the present invention shall be included in the scope of protection of the embodiments of the present invention.

Claims

1. A charging device, characterized in that: include: case; a first circuit board, disposed in the housing, wherein the first circuit board includes a first step-down circuit; a power connector electrically connected to the input end of the first step-down circuit, configured to be electrically connected to an energy storage device and receive a first voltage of the energy storage device, wherein the first step-down circuit is capable of reducing the first voltage to a second voltage; The second circuit board includes a second step-down circuit and a first fast charging socket. The input end of the second step-down circuit is electrically connected to the output end of the first step-down circuit, and can reduce the second voltage of the first step-down circuit to a third voltage. The first fast charging socket is connected to the output end of the second step-down circuit, and the first fast charging socket is also used to connect to an electrical load to charge the electrical load.

2. The charging device according to claim 1, characterized in that The second step-down circuit includes a second step-down chip, and the charging device further includes: The control chip is electrically connected to the second step-down chip and is used to adjust the output voltage of the second step-down chip.

3. The charging device according to claim 2, characterized in that The control chip is arranged on the second step-down circuit; and / or The control chip and the second step-down chip are integrated into one chip.

4. The charging device according to claim 1, wherein: The second step-down circuit includes a second step-down chip, and the charging device further includes: a control chip, electrically connected to the second step-down chip, and configured to control the output voltage of the second step-down chip; Among them, the second circuit board also includes a third step-down circuit, the third step-down circuit is connected in parallel with the second step-down circuit, the third step-down circuit includes a third step-down chip and a second fast charging socket, the first fast charging socket is a Type-C interface, and the second fast charging socket is a USB interface.

5. The charging device according to claim 1, wherein: The second step-down circuit further includes a communication chip for realizing information transmission between the charging device and the electrical load; and / or The first buck circuit further includes a switch device for controlling on-off between the first buck circuit and the second buck circuit.

6. The charging device according to claim 1, wherein: The first circuit board includes a first fixing plate, the second circuit board includes a second fixing plate, the first fixing plate and the second fixing plate are arranged in the shell with an interval, the first step-down circuit is arranged on a side of the first fixing plate away from the second fixing plate, and the second step-down circuit is arranged on a side of the second fixing plate away from the first fixing plate.

7. The charging device according to any one of claims 1 to 6, characterized in that: The housing comprises: A panel, wherein both ends of the panel are open; a front plate, covering an opening of the enclosure; The rear plate covers the other opening of the enclosure, and the first circuit board and the second circuit board are arranged in the enclosure.

8. The charging device according to claim 7, characterized in that The front plate is provided with an avoidance through hole, and the charging device further comprises: A connecting line has one end connected to the input end of the first step-down circuit, and the other end passing through the avoidance through hole and connected to the power connector.

9. The charging device according to claim 8, characterized in that The housing further comprises a partition plate, which forms a wire storage cavity with the enclosure plate, and the connecting wire can be hidden in the wire storage cavity; and / or The front panel is provided with a clamping portion, and the power connector is provided with a matching portion. The clamping portion can match with the matching portion to fix the power connector on the front panel.

10. The charging device according to claim 7, characterized in that: The enclosure plate is an aluminum alloy plate; and / or The front plate and the rear plate are both composite plates.

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