Power supply device and charging control method

Abstract

The present disclosure provides a power supply device and a charging control method, which relate to the field of charging technology. The power supply device includes: a first power supply module, which is used to convert the received AC voltage into a first DC voltage; a second power supply module, the output end of which is connected in series with the output end of the first power supply module, and is used to convert the received AC voltage into a second DC voltage; the number of the second power supply modules is at least one; and a charging interface, which is connected to the first power supply module and the second power supply module respectively, and is used to provide an output voltage whose voltage value is the sum of the voltage value of the first DC voltage and the voltage value of the second DC voltage; wherein the voltage value of the second voltage is determined by the first power supply module.

Description

Technical Field

[0001] The present disclosure relates to the field of charging technology, and in particular to a power supply device and a charging control method. Background Art

[0002] With the widespread use of electronic devices (such as smart phones, tablet computers and other intelligent terminal devices), their functions are increasing, but the power consumption is also increasing accordingly, and they need to be charged frequently. In order to speed up the charging speed, a corresponding power adapter is required to output more power.

[0003] However, current power adapters that can output relatively high power are relatively large in size, inconvenient to carry around, and result in poor user experience.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] The purpose of the present disclosure is to provide a power supply device and a charging control method.

[0006] Other features and advantages of the present disclosure will become apparent from the following detailed description, or may be learned in part by the practice of the present disclosure.

[0007] According to one aspect of the present disclosure, there is provided a power supply device, comprising: a first power supply module, for converting a received AC voltage into a first DC voltage; a second power supply module, wherein an output end of the second power supply module is connected in series with an output end of the first power supply module, for converting the received AC voltage into a second DC voltage; the number of the second power supply modules is at least one; and a charging interface, respectively connected to the first power supply module and the second power supply module, for providing an output voltage having a voltage value that is the sum of a voltage value of the first DC voltage and a voltage value of the second DC voltage; wherein the voltage value of the second voltage is determined by the first power supply module.

[0008] According to another aspect of the present disclosure, a power supply providing device is provided, including: a first power supply module, used to convert a received AC voltage into a first DC voltage; a second power supply module, the output end of the second power supply module is connected in series with the output end of the first power supply module, and is used to convert the received AC voltage into a second DC voltage; the number of the second power supply modules is at least one; a charging interface, respectively connected to the first power supply module and the second power supply module, and is used to provide an output voltage whose voltage value is the sum of the voltage value of the first DC voltage and the voltage value of the second DC voltage; and a control unit, respectively connected to the first power supply module and the second power supply module, and is used to determine the voltage value of the first DC voltage and the voltage value of the second DC voltage.

[0009] According to another aspect of the present disclosure, a charging control method is provided, which is applied to a power supply providing device, including: converting a received AC voltage into a first DC voltage through a first power supply module in the power supply providing device; converting the received AC voltage into a second DC voltage through a second power supply module of the power supply providing device; and providing an output voltage whose voltage value is the sum of the voltage value of the first DC voltage and the voltage value of the second DC voltage through a charging interface of the power supply providing device; wherein the voltage value of the second voltage is determined by the first power supply module; and the number of the second power supply modules is at least one.

[0010] According to another aspect of the present disclosure, there is provided a charging control method, which is applied to a power supply providing device, comprising: converting a received AC voltage into a first DC voltage by a first power supply module in the power supply providing device; converting the received AC voltage into a second DC voltage by a second power supply module in the power supply providing device; determining a voltage value of the first DC voltage and a voltage value of the second DC voltage by a control unit in the power supply providing device; and providing an output voltage having a voltage value that is the sum of a voltage value of the first DC voltage and a voltage value of the second DC voltage through a charging interface of the power supply providing device; wherein the number of the second power supply modules is at least one.

[0011] According to the power supply device provided by the embodiment of the present disclosure, multiple power supply modules connected in series are encapsulated, which can realize the miniaturization of the power supply device under the premise of improving the output power. In addition, the power supply device determines the magnitude of the DC voltage output by each power supply module by the main power supply module, which can ensure the coordinated work between the power supply modules.

[0012] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0014] Figure 1 is a schematic diagram of a charging system according to an exemplary embodiment.

[0015] Figure 2 is a schematic structural diagram of a power supply device according to an exemplary embodiment.

[0016] Figure 3 is a schematic structural diagram of another power supply device according to an exemplary embodiment.

[0017] Figure 4 is a schematic structural diagram of yet another power supply device according to an exemplary embodiment.

[0018] Figure 5A is a schematic diagram of a power supply device according to an example.

[0019] Figure 5B is a schematic diagram showing a first power supply module and a second power supply module stacked according to an example.

[0020] Fig. 6A The figure is a schematic diagram of the structure of a first power supply module according to an exemplary embodiment.

[0021] Figure 6B is a schematic structural diagram of a second power supply module according to an exemplary embodiment.

[0022] Fig. 7A is a schematic structural diagram of another first power supply module according to an exemplary embodiment.

[0023] Figure 7B is a schematic structural diagram of another second power supply module according to an exemplary embodiment.

[0024] Figure 7C is a schematic structural diagram of yet another first power supply module according to an exemplary embodiment.

[0025] Fig.7D is a schematic structural diagram of yet another second power supply module according to an exemplary embodiment.

[0026] Fig. 7E is a schematic structural diagram of yet another first power supply module according to an exemplary embodiment.

[0027] Figure 7F is a schematic structural diagram of yet another second power supply module according to an exemplary embodiment.

[0028] Figure 8 is a schematic structural diagram of yet another power supply device according to an exemplary embodiment.

[0029] Fig. 9A is a schematic structural diagram of yet another first power supply module according to an exemplary embodiment.

[0030] Fig. 9B is a schematic structural diagram of yet another second power supply module according to an exemplary embodiment.

[0031] Fig. 10A is a schematic structural diagram of yet another power supply device according to an exemplary embodiment.

[0032] Fig. 10B is a schematic structural diagram of yet another power supply device according to an exemplary embodiment.

[0033] Fig.11 The figure is a flow chart of a charging control method according to an exemplary embodiment.

[0034] Fig.12 is a flow chart showing another charging control method according to an exemplary embodiment.

[0035] Fig.13 is a flow chart of yet another charging control method according to an exemplary embodiment.

[0036] Fig.14 is a flow chart of yet another charging control method according to an exemplary embodiment.

[0037] Fig.15 is a flow chart of yet another charging control method according to an exemplary embodiment.

[0038] Fig.16 is a flow chart of yet another charging control method according to an exemplary embodiment.

[0039] Fig.17 is a flow chart of yet another charging control method according to an exemplary embodiment. DETAILED DESCRIPTION

[0040] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the disclosure will be more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0041] In addition, the accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and their repeated description will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0042] In the present disclosure, unless otherwise clearly specified and limited, the terms "connected", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B, which can indicate the existence of A alone, B alone, and the existence of A and B at the same time.

[0044] Hereinafter, the power supply device and the charging control method in the exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings and embodiments.

[0045] Figure 1 is a schematic diagram of a charging system according to an exemplary embodiment.

[0046] refer to Figure 1 The charging system 1 includes: a power supply device 11 and a device to be charged 12.

[0047] The power supply device 11 is, for example, a power adapter, a mobile power bank, or other equipment.

[0048] The power supply device 11 is connected to the device to be charged 12 via a cable to provide power to the device to be charged 12 so as to charge the battery 122 in the device to be charged 12 .

[0049] The device to be charged 12 can be, for example, a terminal or electronic device, which can be a mobile terminal such as a mobile phone, a game console, a tablet computer, an e-book reader, a smart wearable device, an MP4 (Moving Picture Experts Group Audio Layer IV) player, a smart home device, an AR (Augmented Reality) device, a VR (Virtual Reality) device, etc.; it can also be a mobile power source (such as a power bank, a travel charger), an electronic cigarette, a wireless mouse, a wireless keyboard, a wireless headset, a Bluetooth speaker, etc., which is a rechargeable electronic device with a charging function; or, it can also be a personal computer (PC), such as a laptop computer and a desktop computer.

[0050] The device to be charged 12 is connected to the charging interface 113 in the power supply device 11 via the charging interface 121 .

[0051] The charging interface 121 may be, for example, a USB interface that meets the USB 2.0 specification, USB 3.0 specification, or USB 3.1 specification, including: a Micro USB interface or a USB TYPE-C interface, etc. In some embodiments, the charging interface 121 may also be a lightning interface, or any other type of parallel or serial port that can be used for charging.

[0052] Correspondingly, the charging interface 113 may be a male USB interface or Lightning interface that is compatible with the charging interface 121 and meets the USB 2.0 specification, USB 3.0 specification or USB 3.1 specification.

[0053] If the power supply device 11 can communicate with the device to be charged 12 through the charging interface 113 and the charging interface 121, neither party needs to set up an additional communication interface or other wireless communication module. If the charging interface 113 and the charging interface 121 are USB interfaces, the power supply device 11 and the device to be charged 12 can communicate based on the data lines (such as D+ and / or D- lines) in the USB interface. For example, if the charging interface 113 and the charging interface 121 are USB interfaces that support the power transmission (PD) communication protocol (such as a USBTYPE-C interface), the power supply device 11 and the device to be charged 12 can communicate based on the PD communication protocol. In addition, the power supply device 11 and the device to be charged 12 can also communicate through other communication methods other than the charging interface 113 and the charging interface 121. For example, the power supply device 11 and the device to be charged 12 communicate wirelessly, such as near field communication (NFC).

[0054] Taking the case where both the charging interface 121 and the charging interface 113 are USB interfaces, when the device to be charged 12 is connected to the power supply device 11 through a cable, the device to be charged 12 identifies whether the connection port provided by the power supply device 11 is a dedicated charging port (Dedicated Charging Port, DCP), which does not support data transmission, can provide a charging current of more than 1.5A, and the D+ and D- lines of the port are short-circuited. This type of port can support chargers and car chargers with higher charging capabilities. Specifically, the device to be charged 12 identifies whether the connection port provided by the power supply device 11 is a DCP through the BC2.1 protocol. BC2.1 is a USB charging specification, which specifies the detection, control and reporting mechanism of charging devices through USB ports. The BC2.1 protocol is well known to ordinary technicians in this field, and in order to avoid obscuring the present disclosure, it will not be repeated here.

[0055] When the device to be charged 12 identifies that the port provided by the power supply device 11 is a DCP, it can further identify the type of the power supply device 11 by setting different preset communication levels to be loaded on D+ / D-.

[0056] The types of the power supply device 11 can be divided into, for example, a normal charging type and a fast charging type. A fast charging type power supply device can provide a greater output power for the device to be charged than a normal charging type power supply device. The maximum output power of a normal charging type power supply device is, for example, 10W (5V / 2A). The fast charging type can be further divided into a first fast charging type and a second fast charging type. Among them, the maximum output power of the first fast charging type power supply device is, for example, 20W (5V / 4A); the maximum output power of the second fast charging type power supply device is, for example, 50W (10V / 5A).

[0057] When the device to be charged 12 is charged by the power supply device 11, it can request the required charging voltage and / or charging current from the power supply device 11 through the communication channel between the power supply device 11 (such as through the data lines D+ / D- in the USB interface) to meet its charging needs.

[0058] In the related art, the power supply module in the power supply device usually includes a large-volume capacitor for energy storage. The large-volume capacitor is generally a liquid electrolytic capacitor, which is large in volume, resulting in a large volume of the power supply device. In particular, the electrolytic capacitor included in the power supply module in the high-power power supply device is usually much larger than the electrolytic capacitor included in the power supply module in the low-power power supply device. Therefore, the high-power power supply device is larger in volume, inconvenient to carry, and the user experience is poor.

[0059] Therefore, the present disclosure provides a power supply device and a charging control method thereof, which can realize the miniaturization of the power supply device while improving the output power.

[0060] The power supply device and the charging control method thereof in each exemplary embodiment of the present disclosure will be described in more detail below in conjunction with the accompanying drawings and embodiments.

[0061] Figure 2 is a schematic structural diagram of a power supply device according to an exemplary embodiment.

[0062] refer to Figure 2 The power supply device 11 includes: a first power supply module 111 , a second power supply module 112 and a charging interface 113 .

[0063] The first power supply module 111 is used to convert the AC voltage received from the AC port into a first DC voltage, which may be a constant DC voltage or a pulsating DC voltage.

[0064] The output end of the second power supply module 112 is connected in series with the output end of the first power supply module 111. Figure 2 As shown, the positive output terminal P1+ of the first power supply module 111 is connected to the negative output terminal P2- of the second power supply module 112, the negative output terminal P1- of the first power supply module 111 is connected to the negative output terminal P3- of the charging interface 113, and the positive output terminal P2+ of the second power supply module 112 is connected to the positive output terminal P3+ of the charging interface 113.

[0065] Taking the USB interface as an example, the positive output terminal and the positive input terminal may be VBus in the USB interface, and the negative output terminal and the negative input terminal may be GND in the USB interface.

[0066] It should be noted that Figure 2The output terminal of the first power supply module 111 and the output terminal of the second power supply module 112 are connected in series for example only, and are not intended to limit the present disclosure. For example, the negative output terminal P1- of the first power supply module 111 may be connected to the positive output terminal P2+ of the second power supply module 112, the positive output terminal P1+ of the first power supply module 111 may be connected to the positive output terminal P3+ of the charging interface 113, and the negative output terminal P2- of the second power supply module 112 may be connected to the negative output terminal P3- of the charging interface 113.

[0067] The second power supply module 112 is used to convert the AC voltage received from the AC port into a second DC voltage, which can also be a constant DC voltage or a pulsating DC voltage.

[0068] The charging interface 113 is connected to the first power supply module 111 and the second power supply module 112 respectively, and is used to provide an output voltage whose voltage value is the sum of the voltage value of the first DC voltage and the voltage value of the second DC voltage.

[0069] Among them, taking the first power supply module 111 as the main power supply module as an example, the voltage value of the first DC voltage and the voltage value of the second voltage can both be determined by the first power supply module 111, thereby ensuring the coordinated work between the first power supply module 111 and the second power supply module 112.

[0070] As mentioned above, the electrolytic capacitor contained in the power supply module in the high-power power supply device is usually much larger than the electrolytic capacitor contained in the power supply module in the low-power power supply device. The power supply device provided by the embodiment of the present disclosure can achieve miniaturization of the power supply device under the premise of increasing the output power (such as connecting two 50W power supply modules in series to achieve a maximum output power of 100W). In addition, the power supply device determines the size of the DC voltage output by each power supply module by the main power supply module, which can ensure the coordinated work between the power supply modules.

[0071] In addition, each power supply module in the embodiment of the present disclosure can reuse the structure of the existing power supply module, so that the overall hardware performance does not need to be modified too much. And the charging cable can also remain unchanged, reducing the cost of replacing components / accessories required for device upgrades.

[0072] Figure 2 In the embodiment of the present invention, the power supply device 11 includes a second power supply module as an example. In order to further improve the output power of the power supply device 11, more second power supply modules can be packaged in the power supply device 11, such as two second power supply modules, three power supply modules, etc. The voltage values ​​of the second DC voltages output by the multiple power supply modules are all realized by the first power supply module as the main power supply module. Figure 3As an example, a power supply device including a plurality of second power supply modules is described in detail.

[0073] Figure 3 is a schematic structural diagram of another power supply device according to an exemplary embodiment.

[0074] refer to Figure 3 The second power supply module 112 in the power supply device 11A includes: a second power supply module 112A and a second power supply module 112B.

[0075] The output end of the second power supply module 112A and the output end of the second power supply module 112B are connected in series with the output end of the first power supply module 111. Figure 3 As shown, the positive output terminal P1+ of the first power supply module 111 is connected to the negative output terminal P2A- of the second power supply module 112A, the negative output terminal P1- of the first power supply module 111 is connected to the negative output terminal P3- of the charging interface 113, the positive output terminal P2A+ of the second power supply module 112A is connected to the negative output terminal P2B- of the second power supply module 112B, and the positive output terminal P2B+ of the second power supply module 112B is connected to the positive output terminal P3+ of the charging interface 113.

[0076] Depend on Figure 3 As shown in the power supply device 11A, those skilled in the art should understand that when multiple second power supply modules are included, the last second power supply module connected in series at the tail end needs to be connected to the charging interface to achieve the series connection of multiple second power supply modules with the first power supply module.

[0077] It should be noted that Figure 3 The connection mode of the output terminal of the first power supply module 111 and the output terminal of the second power supply module 112A and the output terminal of the second power supply module 112B is only an example and does not limit the present disclosure. For example, the negative output terminal P1- of the first power supply module 111 can also be connected to the positive output terminal P2A+ of the second power supply module 112A, the positive output terminal P1+ of the first power supply module 111 is connected to the positive output terminal P3+ of the charging interface 113, the negative output terminal P2A- of the second power supply module 112A is connected to the positive output terminal P2B+ of the second power supply module 112B, and the negative output terminal P2B- of the second power supply module 112B is connected to the negative output terminal P3- of the charging interface 113.

[0078] also, Figure 4 Another connection mode between the first power supply module 111 and the second power supply modules 112A and 112B is shown.

[0079] Figure 4is a schematic structural diagram of yet another power supply device according to an exemplary embodiment.

[0080] In such Figure 4 In the power supply providing device 11B shown, the positive output terminal P2A+ of the second power supply module 112A is connected to the positive output terminal P3+ of the charging interface 113, the negative output terminal P2A- of the second power supply module 112A is connected to the positive output terminal P1+ of the first power supply module 111, the negative output terminal P1- of the first power supply module 111 is connected to the positive output terminal P2B+ of the second power supply module 112B, and the negative output terminal P2B- of the second power supply module 112B is connected to the negative output terminal P3- of the charging interface 113.

[0081] refer to Figure 3 or Figure 4 The second power supply module 112A and the second power supply module 112B are respectively used to convert the AC voltage received from the AC port into a second DC voltage. Each second DC voltage can be a constant DC voltage or a pulsating DC voltage.

[0082] The charging interface 113 is used to provide an output voltage whose voltage value is the sum of the voltage value of the first DC voltage and the voltage values ​​of each second DC voltage.

[0083] The voltage value of the second DC voltage output by the second power supply module 112A and the voltage value of the second DC voltage output by the second power supply module 112B are both determined by the first power supply module 111 , thereby coordinating the second power supply module 112A and the second power supply module 112B to work together.

[0084] In some embodiments, in order to further reduce the volume of the power supply device 11 or 11A or 11B, the first power supply module 111 and the second power supply module 112 may be stacked in the packaging space, or the first power supply module 111, the second power supply module 112A and the second power supply module 112B may be stacked in the packaging space. Figure 5A Taking the power supply device shown in the figure as an example, the power supply device can be stacked in the direction H shown by the arrow to reduce the length in the direction L shown by the arrow, thereby reducing the volume of the power supply device. The specific stacking method is as follows Figure 5B shown. Figure 5B In the example, the circuit boards including the first power supply module 111 and the second power supply module 112 are arranged in parallel along the direction H. It should be noted that: Figure 5A The power supply device and the stacking arrangement described above are only examples and are not intended to limit the present disclosure. In practical applications, the design of the stacking arrangement can be determined according to actual needs, for example, according to the shape of the actual power supply device.

[0085] In some embodiments, the first power supply module 111 may receive a request message sent by the device to be charged 12 , and determine the voltage value of the first DC voltage and the voltage values ​​of each second DC voltage according to the request message.

[0086] The request message may, for example, include the charging voltage value requested by the device to be charged 12. Alternatively, the request message may also include the gear information selected by the device to be charged 12. The gear information may correspond to a charging voltage value. In addition, the gear information may be one of the multiple gear information negotiated between the device to be charged 12 and the power supply device 11 during the previous communication process. Each gear information may correspond to a different voltage value (or range) and current value (or range). Taking the PPS specification as an example: the gears may, for example, include: 5V / 3A, 9V / 3A, 3.3~21V / 5.5A, etc.

[0087] The first power supply module 111 determines the voltage value of the first DC voltage and the voltage values ​​of each second DC voltage according to the charging voltage.

[0088] In order to achieve communication with the device to be charged 12, taking the charging interface 113 as a USB interface as an example, Figure 2 As shown, the data lines D+ / D− and the CC1 and CC2 lines in the charging interface 113 are all connected to the first power supply module 111 .

[0089] by Figure 2 Taking the power supply device 11 as an example, it is assumed that the maximum output power of the first power supply module 111 and the second power supply module 111 are both 50W (10V / 5A).

[0090] When the power supply device 11 is connected to the device to be charged 12 via a cable, and the device to be charged 12 completes the power supply device type identification as described above, the power supply device 11 charges the device to be charged 12 .

[0091] If the charging voltage value requested by the device to be charged 12 to the power supply device 11 is less than or equal to the first threshold value (for example, 10V) by communicating with the power supply device 11, the first power supply module 111 can determine that it alone supplies power to the device to be charged 12, which is equivalent to determining that the voltage value of the second DC voltage is 0. At this time, the maximum output power of the power supply device 11 is 50W (10V / 5A).

[0092] If the charging voltage value requested by the device to be charged 12 to the power supply device 11 is greater than the first threshold value (such as 10V) and less than or equal to the second threshold value (such as 13.3V), for example, the charging voltage value requested by the device to be charged 12 is 10.1V, then the first power supply module 111 can determine that the voltage value of the first DC voltage outputted by it is 6.7V and the voltage value of the second DC voltage outputted by the second power supply module 112 is 3.4V according to the charging voltage value (according to the PPS protocol, the minimum output voltage of a single adapter circuit is 3.3V). At this time, the maximum output power of the power supply device 11 is 13.3V*5A=66.5W.

[0093] If the charging voltage value requested by the device to be charged 12 to the power supply device 11 is greater than the second threshold value (such as 13.3V), for example, the charging voltage value requested by the device to be charged 12 is 15V, then the first power supply module 111 can determine that the voltage value of the first DC voltage outputted by it is 10V and the voltage value of the second DC voltage outputted by the second power supply module 112 is 5V according to the charging voltage value. At this time, the maximum output power of the power supply device 11 is 20V*5A=100W.

[0094] The battery 122 in the device to be charged 12 may be, for example, a single battery or a battery cell, or a lithium battery comprising a plurality of battery cells connected in series. Alternatively, the battery 122 may also include a plurality of battery cells connected in series, each battery cell being a lithium battery comprising a single battery cell or a plurality of battery cells. When the battery 122 includes a plurality of battery cells or a plurality of battery cells, each battery cell or a battery cell may be charged separately, or the plurality of battery cells or a plurality of battery cells may be charged as a whole.

[0095] The following uses an example in which the battery 122 includes two battery units connected in series, and each battery unit includes a single cell, to illustrate how to use multiple battery units connected in series to increase the charging speed and reduce the heat generated by the electronic device when charging with a large current.

[0096] For electronic devices containing a single battery cell, when a larger charging current is used to charge a single battery cell, the heating phenomenon of the electronic device will be more serious. In order to ensure the charging speed of the electronic device and alleviate the heating phenomenon of the electronic device during the charging process, the battery structure can be modified to use multiple battery cells connected in series, and the multiple battery cells can be directly charged, that is, the voltage output by the adapter is directly loaded to the two ends of each battery cell in the multiple battery cells. Compared with the single battery cell solution (that is, the capacity of the single battery cell before the improvement is considered to be the same as the total capacity of the multiple battery cells connected in series after the improvement), if the same charging speed is to be achieved, the charging current applied to each battery cell in the multiple battery cells is approximately 1 / N of the charging current required for a single battery cell (N is the number of battery cells connected in series). In other words, under the premise of ensuring the same charging speed, multiple battery cells connected in series can greatly reduce the size of the charging current, thereby further reducing the heat generated by the electronic device during the charging process. Therefore, in order to increase the charging speed and reduce the heat generated by the electronic device during the charging process, the electronic device can use multiple battery cells connected in series.

[0097] In addition, the battery 122 may be, for example, a lithium battery including a plurality of battery cells connected in parallel, or may include a plurality of battery units connected in parallel, each battery unit being a lithium battery including a single battery cell or multiple battery cells.

[0098] In some embodiments, the first power supply module 111 can also determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the battery cell status fed back by the device to be charged 12. For example, when the battery 122 in the device to be charged 12 contains only a single battery cell and does not require a larger charging voltage and / or charging current, the first power supply module 111 can determine to power the device to be charged 12 only by itself, that is, to set the voltage value of the second DC voltage to 0. When the battery 122 in the device to be charged 12 contains multiple batteries connected in series and requires a large current and / or a higher voltage, the first power supply module 111 can work together with the second power supply module 112 to power the device to be charged 12.

[0099] The battery charging process may include the following charging stages: trickle charging stage, constant current charging stage, and constant voltage charging stage.

[0100] Among them, in the trickle charging stage, the battery discharged to a preset voltage threshold is first pre-charged (i.e., recovery charging). The trickle charging current is usually one tenth of the constant current charging current. When the battery voltage rises above the trickle charging voltage threshold, the charging current is increased to enter the constant current charging stage.

[0101] In the constant current charging stage, the battery is charged with a constant current, and the battery voltage rises rapidly. When the battery voltage reaches the expected voltage threshold (or cut-off voltage) of the battery, it enters the constant voltage charging stage.

[0102] During the constant voltage charging stage, the battery is charged at a constant voltage, and the charging current gradually decreases. When the charging current drops to a set current threshold (the current threshold is usually a few tenths or less of the charging current value during the constant current charging stage. Optionally, the current threshold can be tens of milliamperes or less), the battery is fully charged.

[0103] In addition, after the battery is fully charged, some current loss will occur due to the self-discharge of the battery, and then it will enter the supplementary charging stage. In the supplementary charging stage, the charging current is very small, just to ensure that the battery is in a fully charged state.

[0104] It should be noted that the constant current charging stage mentioned in the embodiments of the present disclosure does not require that the charging current remains completely constant. For example, it may generally refer to that the peak value or average value of the charging current remains constant over a period of time.

[0105] In practice, the constant current charging stage can also be charged in a multi-stage constant current charging manner.

[0106] The segmented constant current charging may have M constant current stages (M is an integer not less than 2). The segmented constant current charging starts the first stage of charging with a predetermined charging current, and the M constant current stages of the segmented constant current charging are executed sequentially from the first stage to the Mth stage. When the previous constant current stage in the constant current stage turns to the next constant current stage, the current size can be reduced; when the battery voltage reaches the charging voltage threshold corresponding to the current constant current stage, it will turn to the next constant current stage. The current conversion process between two adjacent constant current stages can be gradual or step-like jump changes.

[0107] As can be seen from the above, during the charging process of the battery, in the constant current charging stage, the charging current is the largest, causing the battery voltage to increase rapidly.

[0108] In some embodiments, the first power supply module 111 can also determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging stage of the device to be charged 12 as fed back by the device to be charged 12. For example, in the trickle charging stage and / or the constant voltage charging stage, the charging voltage and / or charging current required by the device to be charged is small, so the first power supply module 111 can choose to supply power to the device to be charged 12 only by itself, that is, determine that the voltage value of the second DC voltage is 0. In the constant current charging stage, since the required charging current and / or charging voltage is large, it can be determined that it and the second power supply module 112 jointly supply power.

[0109] Fig. 6A is a schematic structural diagram of a first power supply module 111 according to an exemplary embodiment.

[0110] refer to Fig. 6A The first power supply module 111 includes: a first control unit C1 and a first voltage conversion unit S1.

[0111] The first control unit C1 is used to receive a charging voltage value requested by the device to be charged 12, and determine the voltage value of the first DC voltage and the voltage values ​​of each second DC voltage according to the charging voltage value.

[0112] The first control unit C1 can be implemented, for example, by an independent micro control unit (MCU).

[0113] The first voltage conversion unit S1 is connected to the first control unit C1, and is used to adjust the voltage value of the output voltage of the first power supply module 111 to the voltage value of the first DC voltage determined by the first control unit C1 according to the control of the first control unit C1.

[0114] The first voltage conversion unit S1 may include at least one of a BUCK, a Boost, a BUCK / Boost, a charge pump or a CUK circuit.

[0115] It should be noted that the present disclosure does not limit the conversion ratio of the charge pump. In practical applications, it is set according to actual needs, for example, it can be set to 1:1, 2:1, 3:1, etc. In addition, when a higher voltage needs to be output, the conversion ratio of the charge pump can also be set to 1:2, 1:3, etc. to perform a boost operation.

[0116] Alternatively, the first voltage conversion unit S1 may further include: a CUK circuit. The CUK circuit can implement both a boost operation and a buck operation.

[0117] In addition, if Fig. 6A As shown, the first power supply module 111 may further include: a first rectifier circuit R1. The first rectifier circuit R1 is used to convert an AC voltage received from an AC into a DC voltage, such as a pulsating DC voltage.

[0118] In addition, in order to obtain a stable DC voltage (such as a constant DC voltage), the first power supply module 111 may further include: a first filter circuit F1 connected to the output end of the first rectifier circuit R1, for filtering the DC voltage output by the first rectifier circuit R1.

[0119] It should be noted that the present disclosure does not limit the specific circuit structure of the first rectifier circuit R1. The first rectifier circuit R1 may be, for example, a commonly used rectifier bridge, or may be other circuits that can realize the above-mentioned function of converting AC voltage into DC voltage.

[0120] Figure 6B is a schematic structural diagram of a second power supply module 112 according to an exemplary embodiment.

[0121] refer to Figure 6B The second power supply module 112 (or 112A or 112B) includes: a second control unit C2 and a second voltage conversion unit S2.

[0122] The second control unit C2 is used to communicate with the first control unit C1 in the first power supply module 111 and receive the voltage value of the second DC voltage sent by the first control unit C1.

[0123] The second control unit C2 may also be implemented by, for example, an independent micro control unit (MCU).

[0124] The second voltage conversion unit S2 is connected to the second control unit C2, and is used to adjust the output voltage of the second power supply module 112 (or 112A or 112B) to the voltage value of the second DC voltage determined by the first control unit C1 according to the control of the second control unit C2.

[0125] The second voltage conversion unit S2 may include at least one of a BUCK, a Boost, a BUCK / Boost, a charge pump or a CUK circuit.

[0126] It should be noted that the present disclosure does not limit the conversion ratio of the charge pump. In practical applications, it is set according to actual needs, for example, it can be set to 1:1, 2:1, 3:1, etc. In addition, when a higher voltage needs to be output, the conversion ratio of the charge pump can also be set to 1:2, 1:3, etc. to perform a boost operation.

[0127] Alternatively, the second voltage conversion unit S2 may further include: a CUK circuit. The CUK circuit can implement both a boost operation and a buck operation.

[0128] In addition, if Figure 6B As shown, the second power supply module 112 (or 112A or 112B) may further include: a second rectifier circuit R2. The second rectifier circuit R2 is used to convert the AC voltage received from the AC into a DC voltage, such as a pulsating DC voltage.

[0129] In addition, in order to obtain a stable DC voltage (such as a constant DC voltage), the second power supply module 112 (or 112A or 112B) may further include: a second filter circuit F2, connected to the output end of the second rectifier circuit R2, for filtering the DC voltage output by the second rectifier circuit R2.

[0130] It should be noted that the present disclosure does not limit the specific circuit structure of the second rectifier circuit R2. The second rectifier circuit R2 may be, for example, a commonly used rectifier bridge, or may be other circuits that can realize the above-mentioned function of converting AC voltage into DC voltage.

[0131] Fig. 7A is a schematic structural diagram of another first power supply module 211 according to an exemplary embodiment. Figure 7B is a schematic structural diagram of another second power supply module 212 according to an exemplary embodiment.

[0132] and Fig. 6A and Figure 6B The first power supply module 111 and the second power supply module 112 shown are different in that: Fig. 7A and Figure 7B The first power supply module 211 and the second power supply module 212 shown do not need to include the aforementioned large-volume liquid electrolytic capacitors, thereby further reducing the volume of the power supply device.

[0133] like Fig. 7A As shown, the first power supply module 211 includes: a first conversion circuit 2111 and a second conversion circuit 2112 .

[0134] The first conversion circuit 2111 may be, for example, a boost circuit for converting a received AC voltage (such as mains power received from a power grid) into a pulsating DC voltage whose voltage value is higher than that of the AC voltage.

[0135] The voltage range of the pulsating direct current output by the first conversion circuit 2111 is, for example, between 390V and 450V.

[0136] The second conversion circuit 2112 is connected to the first conversion circuit 2111, and is used to convert the pulsating DC voltage output by the first conversion circuit 2111, and output a constant DC voltage as the above-mentioned first DC voltage.

[0137] Those skilled in the art should understand that the first DC voltage output by the second conversion circuit 2112 is a constant DC voltage without a pulsating waveform, but the voltage value of the first DC voltage is not fixed, and different voltage values ​​can be output in different charging scenarios or charging stages.

[0138] The first power supply module 211 adopts a two-stage architecture consisting of a first conversion circuit and a second conversion circuit. Since the first conversion circuit boosts the input AC voltage, there is a variable bus voltage between the two-stage architecture, and the energy storage function can be achieved through the change of the bus voltage, so there is no need to use a large capacitor as an energy storage element. Removing the large capacitor can reduce the volume of the first power supply module 211.

[0139] In some embodiments, the first conversion circuit 2111 may further include: at least one capacitor 2113 with a relatively small filtering capability (such as a capacitor whose capacitance is less than a preset value or a capacitor whose volume is less than a preset volume threshold), which is used to filter out the burrs of the pulsating voltage output by the first conversion circuit 2111 to improve the quality of the output current of the first power supply module 211. The capacitor 2113 may be, for example, a thin film capacitor, a multilayer ceramic capacitor (MLCC), a chip capacitor, or an electrolytic capacitor whose capacity is less than the above-mentioned preset value. The volume and / or capacity of the filter capacitor 2113 are relatively small, so it will not have a significant impact on the volume of the first power supply module 211.

[0140] In addition, the second conversion circuit 2112 may further include: a first switch unit 21121 and a transformer 21122 .

[0141] The first power supply module 211 may further include a control unit 2114 and a first detection unit 2115. The first detection unit 2115 is connected to the transformer 21122, and is used to detect the output voltage and / or output current of the transformer 21122. The control unit 2114 is connected to the first detection unit 2115 and the first switch unit 21121, respectively, and is used to output a control signal according to the output voltage and / or output current of the transformer 21122 detected by the first detection unit 2115, control the on or off of the first switch unit 21121, adjust the output voltage of the transformer 21122, and thus adjust the voltage value of the first DC voltage output by the first power supply module 211.

[0142] The detected output voltage and / or output current may be a sampling signal of the output voltage and / or output current of the transformer 21122 .

[0143] The transformer 21122 can couple electric energy from the primary side to the secondary side in an electromagnetic coupling manner. The electric energy coupled to the secondary side can be extracted from the electric energy output by the first conversion circuit 2111. The energy extraction method can be controlled by the control unit 2114 according to the output voltage and / or output current of the transformer 21122 detected.

[0144] In some embodiments, the first detection unit 2115 may also directly detect the output voltage and / or output current of the first power supply module 211. The control unit 2114 may output a control signal according to the output voltage and / or output current of the first power supply module 211, control the on or off of the first switch unit 21121, adjust the output voltage of the transformer 21122, and thereby adjust the voltage value of the first DC voltage output by the first power supply module 211. The output voltage and / or output current may be a sampling signal of the output voltage and / or output current of the first power supply module 211.

[0145] In some embodiments, the second conversion circuit 2112 may be implemented as an LLC resonant converter, for example.

[0146] The control unit 2114 can be implemented as a microcontroller unit (MCU), for example. In order to make the first power supply module 211 output the first DC voltage, the control signal output by the control unit 2114 to the first switch unit 21121 includes: a pulse frequency modulation (PFM) signal and a pulse width modulation (PWM) signal, which controls the on and off of the first switch unit 21121.

[0147] When a PFM signal is output, the duty cycle of the PFM signal is kept unchanged, and the PFM signal is controlled by adjusting the interval (i.e., frequency) of the PFM signal. When a PWM signal is output, the frequency of the PWM signal is kept unchanged, and the duty cycle (i.e., signal width) of the PWM signal is adjusted to control the PWM signal.

[0148] The control unit 2114 may determine whether to output a PWM signal or a PFM signal according to the output voltage and / or output current of the transformer 21122 , or according to the output voltage and / or output current of the first power supply module 211 , for example.

[0149] In addition, the first power supply module 211 can also be as follows Fig. 7A As shown, a second detection unit 2116 is included, which is used to detect the output voltage and / or output current of the first conversion circuit 2111. The control unit 2114 controls the on and off of the switch unit included in the first conversion circuit 2111 by outputting a control signal according to the output voltage and / or output current detected by the second detection unit 2116, so as to adjust the output voltage and / or output current of the first conversion circuit 2111.

[0150] like Figure 7B As shown, the second power supply module 212 includes: a first conversion circuit 2121 and a second conversion circuit 2122 .

[0151] The first conversion circuit 2121, for example, may be a boost circuit for converting a received AC voltage (such as mains power received from a power grid) into a pulsating DC voltage whose voltage value is higher than that of the AC voltage.

[0152] The voltage range of the pulsating direct current output by the first conversion circuit 2111 is, for example, between 390V and 450V.

[0153] The second conversion circuit 2122 is connected to the first conversion circuit 2121, and is used to convert the pulsating DC voltage output by the first conversion circuit 2121, and output a constant DC voltage as the above-mentioned first DC voltage.

[0154] Those skilled in the art should understand that the second DC voltage output by the second conversion circuit 2122 is a constant DC voltage without a pulsating waveform, but the voltage value of the second DC voltage is not fixed, and different voltage values ​​can be output in different charging scenarios or charging stages.

[0155] The second power supply module 212 adopts a two-stage architecture consisting of a first conversion circuit and a second conversion circuit. Since the first conversion circuit boosts the input AC voltage, there is a variable bus voltage between the two-stage architecture, and the energy storage function can be achieved through the change of the bus voltage, so there is no need to use a large capacitor as an energy storage element. Removing the large capacitor can reduce the volume of the second power supply module 212.

[0156] In some embodiments, the first conversion circuit 2121 may further include: at least one capacitor 2123 with a relatively small filtering capability (such as a capacitor whose capacitance is less than a preset value or a capacitor whose volume is less than a preset volume threshold), which is used to filter out the burrs of the pulsating voltage output by the first conversion circuit 2121 to improve the quality of the output current of the second power supply module 212. The capacitor 2123 may be, for example, a thin film capacitor, a multilayer ceramic capacitor (MLCC), a chip capacitor, or an electrolytic capacitor with a capacity less than the above-mentioned preset value. The volume and / or capacity of the filter capacitor 2123 are relatively small, so it will not have a significant impact on the volume of the second power supply module 212.

[0157] In addition, the second conversion circuit 2122 may further include: a first switch unit 21221 and a transformer 21222 .

[0158] The second power supply module 212 may further include a control unit 2124 and a first detection unit 2125. The first detection unit 2125 is connected to the transformer 21222, and is used to detect the output voltage and / or output current of the transformer 21222. The control unit 2124 is connected to the first detection unit 2125 and the first switch unit 21221 respectively, and is used to output a control signal according to the output voltage and / or output current of the transformer 21222 detected by the first detection unit 2125, control the on or off of the first switch unit 21221, adjust the output voltage of the transformer 21222, and thus adjust the voltage value of the second DC voltage output by the second power supply module 211. Specifically, the control unit 2124 receives the voltage value of the second DC voltage determined by the control unit 2114 by communicating with the control unit 2114. The control unit 2124 controls the on or off of the first switch unit 21221, and adjusts the output voltage of the transformer 21222 to the voltage value of the second DC voltage.

[0159] The detected output voltage and / or output current may be a sampling signal of the output voltage and / or output current of the transformer 21222 .

[0160] The transformer 21222 can couple electric energy from the primary side to the secondary side in an electromagnetic coupling manner. The electric energy coupled to the secondary side can be extracted from the electric energy output by the first conversion circuit 2121. The energy extraction method can be controlled by the control unit 2124 according to the output voltage and / or output current of the transformer 21222 detected.

[0161] In some embodiments, the first detection unit 2125 can also directly detect the output voltage and / or output current of the second power supply module 212. The control unit 2124 can output a control signal according to the output voltage and / or output current of the second power supply module 212, control the on or off of the first switch unit 21221, adjust the output voltage of the transformer 21222, and thus adjust the voltage value of the second DC voltage output by the second power supply module 212. The output voltage and / or output current can be a sampling signal of the output voltage and / or output current of the second power supply module 212.

[0162] In some embodiments, the second conversion circuit 2122 may be implemented as an LLC resonant converter, for example.

[0163] The control unit 2124 can be implemented as a microcontroller unit (MCU), for example. In order to make the second power supply module 212 output the second DC voltage, the control signal output by the control unit 2124 to the first switch unit 21221 includes: a pulse frequency modulation (PFM) signal and a pulse width modulation (PWM) signal, which controls the on and off of the first switch unit 21221.

[0164] When a PFM signal is output, the duty cycle of the PFM signal is kept unchanged, and the PFM signal is controlled by adjusting the interval (i.e., frequency) of the PFM signal. When a PWM signal is output, the frequency of the PWM signal is kept unchanged, and the duty cycle (i.e., signal width) of the PWM signal is adjusted to control the PWM signal.

[0165] The control unit 2124 may determine whether to output a PWM signal or a PFM signal according to the output voltage and / or output current of the transformer 21222 , or according to the output voltage and / or output current of the second power supply module 212 , for example.

[0166] In addition, the second power supply module 212 can also be as follows Figure 7B As shown, a second detection unit 2126 is included, which is used to detect the output voltage and / or output current of the first conversion circuit 2121. The control unit 2124 controls the conduction and disconnection of the switch unit included in the first conversion circuit 2121 by outputting a control signal according to the output voltage and / or output current detected by the second detection unit 2126, so as to adjust the output voltage and / or output current of the first conversion circuit 2121.

[0167] Figure 7C is a schematic structural diagram of yet another first power supply module according to an exemplary embodiment. Fig.7D is a schematic structural diagram of yet another second power supply module according to an exemplary embodiment.

[0168] and Fig. 6A and Figure 6B The first power supply module 111 and the second power supply module 112 shown are different in that: Figure 7C and Fig.7D The first power supply module 411 and the second power supply module 412 shown also do not need to include the aforementioned large-volume liquid electrolytic capacitors, thereby further reducing the volume of the power supply device.

[0169] like Figure 7CAs shown, the first power supply module 411 includes: a rectifier module 4111 , a filter module 4112 , a conversion module 4113 , an operational amplifier module 4114 , a first control module 4115 , a second control module 4116 , and a switch module 4117 .

[0170] The filter module 4112 in the embodiment of the present disclosure may include a filter C1, wherein the filter C1 may be a filter capacitor with a capacity less than a preset threshold, used to filter the rectified AC power to obtain a pulsating DC current; the switch module 4117 may be, for example, a switching power supply; the conversion module 4113 may be the transformer mentioned above; the first control module 4115 and the second control module 4116 may both be implemented as MCUs. In addition, the second control module 4116, as a control unit in the first control module, may be used to control the second power supply module 412.

[0171] Optionally, in some embodiments, the filter capacitor includes a chip capacitor or a film capacitor or an electrolytic capacitor having a capacity less than the preset threshold. The chip capacitor in the embodiment of the present disclosure may refer to a multilayer ceramic chip capacitor (Multi-layer Ceramic Capacitors, MLCC), wherein the MLCC is formed by stacking parallel ceramic materials and electrode materials; the film capacitor may be a capacitor with a metal foil as an electrode, which is overlapped with a plastic film such as polyethylene, polypropylene, polystyrene or polycarbonate from both ends and wound into a cylindrical structure. The filter capacitor in the embodiment of the present disclosure may also be other capacitors, such as supercapacitors, etc., which are not specifically limited in the present disclosure.

[0172] In the disclosed embodiment, the large electrolytic capacitor used for filtering on the primary side of the traditional adapter is replaced with a smaller filter capacitor, such as the above-mentioned MLLCC capacitor (chip capacitor) or film capacitor, so that the volume of the adapter can be reduced; the number of filter capacitors can be one or more, and the connection relationship can be series or parallel, which is mainly determined by the required capacitance;

[0173] After replacing the large electrolytic capacitor, the output of the power supply module will be pulsating DC instead of constant DC. Therefore, when the voltage (AC voltage input to the power supply module) drops to a very low level, the power output of the adapter will also be lower, and the conversion efficiency of the adapter will be low.

[0174] Therefore, if Figure 7CAs shown in , voltage / current sampling is set to sample the voltage after filtering by a small capacitor. The sampled voltage passes through the operational amplifier module 4114, and the coefficient of the operational amplifier module 4114 is K, which converts the voltage into current. The first control unit 4115 adjusts the opening time of the switch module 4117 according to the current fed back by k to limit the power of the conversion module 4113 at low voltage and reduce the impact on the overall efficiency.

[0175] Specifically, when the sampled voltage is lower than a preset value (for example, 100V), the second control module 4116 reduces the peak current flowing through the switch module 4117, which reduces the conduction time of the switch tube, thereby reducing the power of the power supply when the voltage is low and improving the overall output efficiency of the adapter.

[0176] like Fig.7D As shown, the second power supply module 412 includes: a rectifier module 4121 , a filter module 4122 , a conversion module 4123 , an operational amplifier module 4124 , a first control module 4125 , a second control module 4126 , and a switch module 4127 .

[0177] The working principle of the second power supply module 412 is the same as that of the first power supply module 411, which will not be described in detail here. The second control module 4126 serves as the second control unit in the second power supply module 412, and is used to communicate with the second control module 4116 in the first power supply module 411, receive the voltage value of the second DC voltage, and control the magnitude of the second DC voltage output by the second power supply module 412 according to the voltage value.

[0178] Fig. 7E is a schematic structural diagram of yet another first power supply module according to an exemplary embodiment. Figure 7F is a schematic structural diagram of yet another second power supply module according to an exemplary embodiment.

[0179] and Fig. 6A and Figure 6B The first power supply module 111 and the second power supply module 112 shown are different in that: Fig. 7E and Figure 7F The first power supply module 511 and the second power supply module 512 shown also do not need to include the aforementioned large-volume liquid electrolytic capacitors, thereby further reducing the volume of the power supply device.

[0180] Compared to Figure 7C and Fig.7D The first power supply module 411 and the second power supply module 412 are shown. Fig. 7E and Figure 7F The first power supply module 511 and the second power supply module 512 shown further include: a clamping module 5118 and a clamping module 5128 respectively.

[0181] Taking the clamping module 5118 in the first power supply module 511 as an example, the clamping module 5118 may include a capacitor C2, which can absorb all or part of the leakage inductance energy of the transformer when the switch module 4117 is disconnected. The energy processed by the clamping module 5118 can be input to the output end of the transformer to charge the battery.

[0182] Due to the existence of the clamping module 5118, the rigidity of the switch tube included in the switch module 4117 can be reduced, and a switch tube with a lower conductivity can be used, thereby reducing costs and improving the conversion efficiency of the power supply module.

[0183] It should be understood that the clamp module 580 and the switch module 4117 in the embodiment of the present disclosure operate in a complementary mode, that is, when the switch module 4117 is in a closed state, the clamp module 5118 can be disconnected; when the switch module 4117 is in an open state, the clamp module 5118 can be closed.

[0184] Specifically, when the switch module 4117 is in a closed state, the clamp module 5118 can be disconnected. In this case, the DC current output after passing through the filter can be chopped by the switch module 4117, and the DC current processed by the conversion module 4113 can be used to charge the battery; when the switch module 4117 is in an open state, the clamp module 5118 can be closed. In this case, part or all of the leakage inductance energy of the transformer can be absorbed by the clamp module 5118, and the clamp module 5118 then releases the absorbed energy to the output end of the conversion module 4113 for charging the battery.

[0185] The ripple in the embodiments of the present disclosure may be caused by voltage fluctuations of a DC stabilized power supply. Since a DC stabilized power supply is generally formed by an AC power supply through rectification and voltage stabilization, it is inevitable that there are some AC components in the DC stabilized quantity. This AC component superimposed on the DC stabilized quantity is called ripple.

[0186] It can be understood that although an electrolytic capacitor with a capacity less than the preset threshold will produce a larger ripple, it can reduce the size of the adapter overall, and the DC current can be further filtered through a filter. Therefore, an electrolytic capacitor with a capacity less than the preset threshold can also be applied to the embodiments of the present disclosure.

[0187] Figure 8 FIG. 1 is a schematic diagram of a structure of another power supply device according to an exemplary embodiment. Figure 2 The power supply device 11 shown is different in that: Figure 8 The power supply device 11C shown further includes a control unit 114 .

[0188] The control unit 114 is connected to the first power supply module 311 and the second power supply module 312 respectively, and is used to determine the voltage value of the first DC voltage output by the first power supply module 311 and the voltage value of the second DC voltage output by the second power supply module 312 .

[0189] That is, with Figure 2 The difference between the power supply device 11 shown is that the power supply device 11C uses the control unit 114 to uniformly determine the voltage value of the first DC voltage and the voltage value of the second DC voltage, rather than the first power supply module 111 .

[0190] For example, as described above, the control unit 114 may communicate with the device to be charged 12 and receive a request message sent by the device to be charged, which may include the charging voltage requested by the device to be charged 12 or the gear information selected by the device to be charged 12. As described above, the gear information may correspond to the charging voltage requested by the device to be charged 12. Thus, the control unit 114 may determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage requested by the device to be charged 12.

[0191] If the charging voltage value requested by the device to be charged 12 to the power supply device 11C through communication with the power supply device 11C is less than or equal to the first threshold value (for example, 10V), the control unit 114 can determine that the first power supply module 311 alone supplies power to the device to be charged 12, which is equivalent to determining that the voltage value of the second DC voltage is 0. At this time, the maximum output power of the power supply device 11C is 50W (10V / 5A).

[0192] If the charging voltage value requested by the device to be charged 12 to the power supply device 11C is greater than the first threshold value (such as 10V) and less than or equal to the second threshold value (such as 13.3V), for example, the charging voltage value requested by the device to be charged 12 is 10.1V, then the control unit 114 can determine that the voltage value of the first DC voltage output by the first power supply module 311 is 6.7V and the voltage value of the second DC voltage output by the second power supply module 312 is 3.4V according to the charging voltage value (according to the PPS protocol, the minimum output voltage of a single adapter circuit is 3.3V). At this time, the maximum output power of the power supply device 11C is 13.3V*5A=66.5W.

[0193] If the charging voltage value requested by the device to be charged 12 to the power supply device 11C is greater than the second threshold value (such as 13.3V), for example, the charging voltage value requested by the device to be charged 12 is 15V, the control unit 114 can determine that the voltage value of the first DC voltage output by the first power supply module 311 is 10V and the voltage value of the second DC voltage output by the second power supply module 312 is 5V based on the charging voltage value. At this time, the maximum output power of the power supply device 11C is 20V*5A=100W.

[0194] For another example, the control unit 114 may also determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to information such as the battery cell condition of the battery of the device to be charged 12 and the charging stage of the battery.

[0195] It should be noted that, although the figure takes one second power supply module 312 as an example, multiple second power supply modules may also be included.

[0196] Fig. 9A is a schematic structural diagram of a first power supply module 311 according to an exemplary embodiment. Fig. 9B is a schematic structural diagram of a second power supply module 312 according to an exemplary embodiment.

[0197] and Fig. 7A and Figure 7B The difference between the first power supply module 211 and the second power supply module 212 is that: Fig. 9A and Fig. 9B The control units in the first power supply module 311 and the second power supply module 312 are both the above-mentioned control unit 114. The control unit 114 can also be used to respectively perform the functions of the above-mentioned control unit 2114 and the control unit 2124.

[0198] For other similar contents, please refer to Fig. 7A and Figure 7B The description will not be repeated here.

[0199] In addition, those skilled in the art can understand that the first power supply module 311 and the second power supply module 312 can also be implemented as Fig. 7A and Figure 7BThe first power supply module 211 and the second power supply module 212 are shown. The control unit 2114 in the first power supply module 211 and the control unit 2124 in the second power supply module 212 respectively control their respective second conversion circuits 2112 and 2122, and are respectively connected to the control unit 114 to respectively receive the voltage value of the first DC voltage and the voltage value of the second DC voltage sent by the control unit 114 and determined by the control unit 114. Thus, the control unit 2114 controls the first power supply module 211 to output the voltage value of the first DC voltage, and the control unit 2124 controls the second power supply module 212 to output the voltage value of the second DC voltage.

[0200] Fig. 10A is a schematic structural diagram of yet another power supply device according to an exemplary embodiment.

[0201] Fig. 10A The power supply device 11D shown in the figure includes two second power supply modules 112A and a second power supply module 112B as an example. Fig. 10A As shown, the positive output terminal and the negative output terminal of each of the second power supply module 112A and the second power supply module 112B are connected to the switch unit 114A and the switch unit 114B respectively.

[0202] The second control units C2 in the second power supply module 112A and the second power supply module 112B can also be used to control the on or off of the switch unit 114A and the switch unit 114B respectively.

[0203] The switch unit 114A and the switch unit 114B may be implemented as MOS transistors, for example.

[0204] As shown in the figure, when the switch unit 114A is turned on, the positive output terminal and the negative output terminal of the second power supply module 112A are short-circuited, which is equivalent to the voltage value of the second DC voltage provided by the second power supply module 112A being 0; when the switch unit 114A is turned off, the second power supply module 112A is connected in series with the first power supply module 111 and the second power supply module 112B.

[0205] When the switch unit 114B is turned on, the positive output terminal and the negative output terminal of the second power supply module 112B are short-circuited, which is equivalent to the voltage value of the second DC voltage provided by the second power supply module 112B being 0; when the switch unit 114B is turned off, the second power supply module 112B is connected in series with the first power supply module 111 and the second power supply module 112A.

[0206] The second control unit C2 in each of the second power supply module 112A and the second power supply module 112B controls the on or off of the switch unit 114A or the switch unit 114B based on the control of the first control unit C1 in the first power supply module 111 .

[0207] For example, when the second control unit C2 in the second power supply module 112A and / or the second power supply module 112B receives a second DC voltage sent by the first control unit C1 with a voltage value of 0, the switch unit 114A and / or the switch unit 114B connected thereto is controlled to be turned on, so as to short-circuit the positive output terminal and the negative output terminal of the second power supply module 112A and / or the second power supply module 112B, thereby achieving the purpose of making the voltage value of the second DC voltage output by the second power supply module 112A and / or the second power supply module 112B 0.

[0208] In addition, the first control unit C1 may also directly send an instruction to turn on or off the switch unit to the second control unit C2.

[0209] Fig. 10B FIG. 1 is a schematic diagram of a structure of another power supply device according to an exemplary embodiment. Fig. 10A The difference between the power supply device shown in Fig. 10B The power supply device 11E shown in FIG. 1 is controlled by a control unit 114 to turn on and off each switch unit. The control unit 114 can control the turning on and off of each switch unit according to the determined voltage value of the first DC voltage and the voltage value of the second DC voltage.

[0210] For example, when it is determined that the voltage value of the second DC voltage is 0, the control unit 114 controls the switch unit 314A and / or the switch unit 314B to be turned on to short-circuit the positive output terminal and the negative output terminal of the second power supply module 312A and / or the second power supply module 312B, thereby achieving the purpose of making the voltage value of the second DC voltage output by the second power supply module 312A and / or the second power supply module 312B 0.

[0211] Although Fig. 10A and Fig. 10B Taking two second power supply modules as an example, the switch unit therein can also be correspondingly applied to a power supply device including one second power supply module, three second power supply modules, four second power supply modules, etc. Each power supply module is connected in series with the first power supply module and other second power supply modules through the switch unit connected to each of them.

[0212] In the disclosed embodiment, a switch unit is connected between the positive and negative output terminals of the second power supply module. By controlling the on and off of the switch unit, the purpose of short-circuiting the corresponding second power supply module can be achieved, and the structure is simple.

[0213] The following are embodiments of the method disclosed herein, which can be applied to the embodiments of the device disclosed herein. For details not disclosed in the embodiments of the method disclosed herein, please refer to the embodiments of the device disclosed herein.

[0214] Fig.11 is a flow chart showing a charging control method according to an exemplary embodiment. The charging control method can be applied to the above-mentioned power supply device 11 (or 11A, 11B, 11D).

[0215] refer to Fig.11 , the charging control method 10 comprises:

[0216] In step S102, the received AC voltage is converted into a first DC voltage by a first power supply module in the power supply device.

[0217] In step S104, the received AC voltage is converted into a second DC voltage by a second power supply module of the power supply device.

[0218] In step S106 , an output voltage having a voltage value that is a sum of a voltage value of the first DC voltage and a voltage value of the second DC voltage is provided through a charging interface of the power supply device.

[0219] The voltage value of the second voltage is determined by the first power supply module; and the number of the second power supply module is at least one.

[0220] According to the charging control method provided by the embodiment of the present disclosure, a power supply device is encapsulated with multiple power supply modules connected in series, and the main power supply module determines the magnitude of the DC voltage output by each power supply module to coordinate the work between the power supply modules to provide higher output power. In this way, the power supply device can be miniaturized while increasing the output power.

[0221] Fig.12 is a flow chart of another charging control method according to an exemplary embodiment. Fig.11 The difference between the charging control method 10 shown is that Fig.12 The charging control method 20 shown further includes:

[0222] In step S202, a request message sent by an electronic device connected to the power supply device is received through a first control unit in a first power supply module.

[0223] In step S204, the voltage value of the first DC voltage and the voltage values ​​of each second DC voltage are determined by the first control unit according to the request message.

[0224] In some embodiments, the request message includes: the charging voltage value requested by the electronic device; or the request message includes: the gear information selected by the electronic device; the gear information is one of a plurality of gear information negotiated between the electronic device and the power supply device, and each gear information corresponds to a different voltage range and current range. Determining the voltage value of the first DC voltage and the voltage values ​​of each second DC voltage according to the request message by the first control unit includes: determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value corresponding to the gear information by the first control unit.

[0225] In some embodiments, the voltage value of the first DC voltage and the voltage value of the second DC voltage are determined by the first control unit according to the charging voltage value, including: when the charging voltage value is less than or equal to a first threshold value, the voltage value of the second DC voltage is determined to be 0 by the first control unit; when the charging voltage value is greater than the first threshold value and less than or equal to the second threshold value, the voltage value of the first DC voltage is determined to be a first voltage value by the first control unit, and the voltage value of the second current voltage is the difference between the charging voltage value and the first voltage value; when the charging voltage value is greater than the second threshold value, the voltage value of the first DC voltage is determined to be a second voltage value by the first control unit, and the voltage value of the second current voltage is the difference between the charging voltage value and the second voltage value; wherein, the second voltage value is greater than the first voltage value.

[0226] Fig.13 is a flow chart of another charging control method according to an exemplary embodiment. Fig.12 The difference between the charging control method 20 shown is that Fig.13 The charging control method shown further provides an embodiment of step S102.

[0227] like Fig.13 As shown, step S102 includes:

[0228] In step S1022, the voltage value of the output voltage of the first power supply module is adjusted to the voltage value of the first DC voltage through the first voltage conversion unit in the first power supply module according to the control of the first control unit.

[0229] In some embodiments, step S102 may also include: converting the received AC voltage into a first pulsating DC voltage through a first conversion circuit in a first power supply module, wherein a voltage value of the first pulsating DC voltage is higher than a voltage value of the AC voltage; converting the first pulsating DC voltage through a second conversion circuit in a second power supply module to output a first DC voltage.

[0230] In some embodiments, the first pulsating DC voltage is converted by the second conversion circuit in the second power supply module to output the first DC voltage, including: detecting the output voltage value and / or current value of the first transformer unit in the second conversion circuit by the first detection unit in the first power supply module; controlling the first switch unit in the second conversion circuit to be turned on or off by outputting a control signal according to the output voltage value and / or current value of the first transformer unit detected by the first detection unit by the first control unit, and adjusting the voltage value of the output voltage of the first transformer unit to the voltage value of the first DC voltage.

[0231] Fig.14 is a flow chart of another charging control method according to an exemplary embodiment. Fig.12 The difference between the charging control method 20 shown is that Fig.14 The charging control method shown further provides an embodiment of step S104.

[0232] like Fig.14 As shown, step S104 includes:

[0233] In step S1042, the voltage value of the second DC voltage sent by the first control unit is received through the second control unit in the second power supply module.

[0234] In step S1044, the output voltage of the second power supply module is adjusted to a voltage value of the second DC voltage through the second voltage conversion unit in the second power supply module according to the control of the second control unit.

[0235] In some embodiments, step S104 may also include: converting the received AC voltage into a second pulsating DC voltage through a third conversion circuit in the second power supply module, wherein the voltage value of the second pulsating DC voltage is higher than the voltage value of the AC voltage; converting the second pulsating DC voltage through a fourth conversion circuit in the second power supply module to output a second DC voltage.

[0236] In some embodiments, the second pulsating DC voltage is converted by the fourth conversion circuit in the second power supply module to output the second DC voltage, including: detecting the output voltage value and / or current value of the second transformer unit in the fourth conversion circuit by the second detection circuit in the second power supply module; communicating with the first control unit through the second control unit in the second power supply module to receive the voltage value of the second DC voltage sent by the first control unit; and outputting a control signal to control the second switch in the fourth conversion circuit to turn on or off according to the output voltage value and / or current value of the second transformer unit detected by the second detection unit, so as to adjust the voltage value of the output voltage of the second transformer unit to the voltage value of the second DC voltage.

[0237] Fig.15is a flow chart of yet another charging control method according to an exemplary embodiment. Fig.15 The charging control method 30 shown can be applied to the above-mentioned power supply device 11D. Fig.12 The difference between the charging control method 20 shown is that Fig.15 The charging control method 30 shown further includes:

[0238] In step S302, the second control unit controls the on or off of the third switch unit connected between the positive output terminal and the negative output terminal of the second power supply module based on the control of the first power supply module.

[0239] Fig.16 is a flow chart of another charging control method according to an exemplary embodiment. Fig.15 The difference between the charging control method 30 shown is that Fig.16 The charging control method shown further provides an embodiment of step S302.

[0240] like Fig.16 As shown, step S302 includes:

[0241] In step S3022, through the second control unit, when the voltage value of the second DC voltage sent by the first control unit is 0, or when the first control instruction sent by the first control unit is received, the connected third switch unit is controlled to be turned on to short-circuit the positive output terminal and the negative output terminal of the second power supply module.

[0242] Fig.17 FIG. 1 is a flow chart of another charging control method according to an exemplary embodiment. The charging control method can be applied to the above-mentioned power supply device 11C (or 11E).

[0243] refer to Fig.11 , the charging control method 40 includes:

[0244] In step S402, the received AC voltage is converted into a first DC voltage by a first power supply module in the power supply device.

[0245] In step S404, the received AC voltage is converted into a second DC voltage by a second power supply module in the power supply device.

[0246] In step S406, a control unit in the power supply device determines a voltage value of the first DC voltage and a voltage value of the second DC voltage.

[0247] In step S408, an output voltage having a voltage value that is a sum of a voltage value of the first DC voltage and a voltage value of the second DC voltage is provided through a charging interface of the power supply device.

[0248] Among them, the number of the second power supply module is at least one.

[0249] In some embodiments, the charging control method 40 may further include: receiving, by the control unit, a request message sent by an electronic device connected to the power supply device; and determining, by the control unit, a voltage value of the first DC voltage and a voltage value of the second DC voltage according to the request message.

[0250] In some embodiments, the request message includes: the charging voltage value requested by the electronic device; determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the request message by the control unit, including: determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value by the control unit.

[0251] In some embodiments, the request message includes: the gear information selected by the electronic device; determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the request message by the control unit, including: determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value corresponding to the gear information by the control unit; wherein the gear information is one of multiple gear information negotiated between the electronic device and the power supply device, and each gear information corresponds to a different voltage range and current range.

[0252] In some embodiments, step S406 includes: when the charging voltage value is less than or equal to the first threshold value, determining through the control unit that the voltage value of the second DC voltage is 0; when the charging voltage value is greater than the first threshold value and less than or equal to the second threshold value, determining through the control unit that the voltage value of the first DC voltage is the first voltage value, and the voltage value of the second current voltage is the difference between the charging voltage value and the first voltage value; when the charging voltage value is greater than the second threshold value, determining through the control unit that the voltage value of the first DC voltage is the second voltage value, and the voltage value of the second current voltage is the difference between the charging voltage value and the second voltage value; wherein the second voltage value is greater than the first voltage value.

[0253] In some embodiments, step S402 includes: converting the received AC voltage into a first pulsating DC voltage through a first conversion circuit in a first power supply module, and the voltage value of the first pulsating DC voltage is higher than the voltage value of the AC voltage; converting the first pulsating DC voltage through a second conversion circuit in a second power supply module to output a first DC voltage.

[0254] In some embodiments, the first pulsating DC voltage is converted by the second conversion circuit in the second power supply module to output the first DC voltage, including: detecting the output voltage value and / or current value of the first transformer unit in the second conversion circuit by the first detection unit in the first power supply module; controlling the first switch unit in the second conversion circuit to be turned on or off by outputting a control signal through the control unit according to the output voltage value and / or current value of the first transformer unit detected by the first detection unit, and adjusting the voltage value of the output voltage of the first transformer unit to the voltage value of the first DC voltage.

[0255] In some embodiments, step S404 includes: converting the received AC voltage into a second pulsating DC voltage through a third conversion circuit in the second power supply module, and the voltage value of the second pulsating DC voltage is higher than the voltage value of the AC voltage; converting the second pulsating DC voltage through a fourth conversion circuit in the second power supply module to output a second DC voltage.

[0256] In some embodiments, the second pulsating DC voltage is converted by a fourth conversion circuit in the second power supply module to output a second DC voltage, including: detecting the output voltage value and / or current value of the second transformer unit in the fourth conversion circuit by a second detection circuit in the second power supply module; outputting a control signal by a control unit to control the second switch in the fourth conversion circuit to be turned on or off according to the output voltage value and / or current value of the second transformer unit detected by the second detection unit, thereby adjusting the voltage value of the output voltage of the second transformer unit to the voltage value of the second DC voltage.

[0257] In some embodiments, the charging control method 40 further includes: controlling the on or off of a third switch unit connected between the positive output terminal and the negative output terminal of the second power supply module by a control unit.

[0258] In some embodiments, the on or off of a third switch unit connected between the positive output terminal and the negative output terminal of the second power supply module is controlled by a control unit, including: when it is determined that the voltage value of the second DC voltage is 0, the connected third switch unit is controlled to be turned on by the control unit to short-circuit the positive output terminal and the negative output terminal of the second power supply module.

[0259] It should be noted that the above figures are only schematic illustrations of the processes included in the method according to the exemplary embodiment of the present disclosure, and are not intended to be limiting. It is easy to understand that the processes shown in the above figures do not indicate or limit the time sequence of these processes. In addition, it is also easy to understand that these processes can be performed synchronously or asynchronously, for example, in multiple modules.

[0260] The exemplary embodiments of the present disclosure are specifically shown and described above. It should be understood that the present disclosure is not limited to the detailed structures, configurations or implementations described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent configurations included in the spirit and scope of the appended claims.

Claims

1. A power supply device, characterized in that: include: A first power supply module, used for converting the received AC voltage into a first DC voltage; A second power supply module, wherein the output end of the second power supply module is connected in series with the output end of the first power supply module, and is used to convert the received AC voltage into a second DC voltage; the number of the second power supply module is at least one; as well as a charging interface, connected to the first power supply module and the second power supply module respectively, and used to provide an output voltage whose voltage value is the sum of the voltage value of the first DC voltage and the voltage value of the second DC voltage; The voltage value of the second DC voltage is determined by the first power supply module; the second DC voltage is a constant DC voltage or a pulsating DC voltage; The first power supply module is further used to determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the battery cell status fed back by the device to be charged, and to set the voltage value of the second DC voltage to 0 when the battery of the device to be charged contains only a single battery cell, and to charge the device to be charged in conjunction with the second power supply module when the battery of the device to be charged contains multiple batteries connected in series; Alternatively, the first power supply module is also used to determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging stage fed back by the device to be charged, and to set the voltage value of the second DC voltage to 0 when the device to be charged is in the trickle charging stage and / or the constant voltage charging stage, and to charge the device to be charged in conjunction with the second power supply module when the device to be charged is in the constant current charging stage.

2. The power supply device according to claim 1, characterized in that: The first power supply module includes: a first control unit, which is used to receive a request message sent by an electronic device connected to the power supply device, and determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the request message.

3. The power supply device according to claim 2, characterized in that: The request message includes: a charging voltage value requested by the electronic device; and the first control unit is used to determine a voltage value of the first DC voltage and a voltage value of the second DC voltage according to the charging voltage value.

4. The power supply device according to claim 2, characterized in that: The request message includes: the gear information selected by the electronic device; the first control unit is used to determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value corresponding to the gear information; wherein the gear information is one of a plurality of gear information negotiated by the electronic device and the power supply device, and each gear information corresponds to a different voltage range and current range.

5. The power supply device according to claim 3 or 4, characterized in that: The first control unit is used to determine that the voltage value of the second DC voltage is 0 when the charging voltage value is less than or equal to a first threshold.

6. The power supply device according to claim 5, characterized in that: The first control unit is also used to determine that the voltage value of the first DC voltage is a first voltage value, and the voltage value of the second DC voltage is the difference between the charging voltage value and the first voltage value when the charging voltage value is greater than the first threshold and less than or equal to a second threshold.

7. The power supply device according to claim 6, characterized in that: The first control unit is also used to determine that the voltage value of the first DC voltage is a second voltage value when the charging voltage value is greater than the second threshold value, and the voltage value of the second DC voltage is the difference between the charging voltage value and the second voltage value; wherein the second voltage value is greater than the first voltage value.

8. The power supply device according to claim 2, characterized in that: The first power supply module also includes: a first voltage conversion unit, connected to the first control unit, and configured to adjust the voltage value of the output voltage of the first power supply module to the voltage value of the first DC voltage according to the control of the first control unit.

9. The power supply device according to claim 8, characterized in that: The second power supply module includes: a second control unit and a second voltage conversion unit; wherein the second control unit is used to communicate with the first control unit and receive the voltage value of the second DC voltage sent by the first control unit; the second voltage conversion unit is connected to the second control unit and is used to adjust the output voltage of the second power supply module to the voltage value of the second DC voltage according to the control of the second control unit.

10. The power supply device according to claim 2, characterized in that: The first power supply module also includes: a first conversion circuit and a second conversion circuit; wherein the first conversion circuit is used to convert the received AC voltage into a first pulsating DC voltage, and the voltage value of the first pulsating DC voltage is higher than the voltage value of the AC voltage; the second conversion circuit is connected to the first conversion circuit, and is used to convert the first pulsating DC voltage and output the first DC voltage.

11. The power supply device according to claim 10, characterized in that: The second conversion circuit includes: a first switch unit and a first transformer unit; the first power supply module also includes: a first detection unit, connected to the first transformer unit, for detecting the output voltage value and / or current value of the first transformer unit; the first control unit is respectively connected to the first detection unit and the first switch unit, and is also used to control the first switch unit to be turned on or off by outputting a control signal according to the output voltage value and / or current value of the first transformer unit detected by the first detection unit, so as to adjust the voltage value of the output voltage of the first transformer unit to the voltage value of the first DC voltage.

12. The power supply device according to claim 11, characterized in that: The second power supply module includes: a third conversion circuit and a fourth conversion circuit; wherein the third conversion circuit is used to convert the received AC voltage into a second pulsating DC voltage, and the voltage value of the second pulsating DC voltage is higher than the voltage value of the AC voltage; the fourth conversion circuit is respectively connected to the second control unit and the third conversion circuit, and is used to convert the second pulsating DC voltage and output the second DC voltage.

13. The power supply device according to claim 12, characterized in that: The fourth conversion circuit includes: a second switch unit and a second transformer unit; the second power supply module also includes: a second control unit and a second detection unit; wherein the second detection unit is connected to the second transformer unit, and is used to detect the output voltage value and / or current value of the second transformer unit; the second control unit is respectively connected to the second detection unit and the second switch unit, and is used to communicate with the first control unit, and receive the voltage value of the second DC voltage sent by the first control unit; and according to the output voltage value and / or current value of the second transformer unit detected by the second detection unit, the second switch unit is controlled to be turned on or off by outputting a control signal, and the voltage value of the output voltage of the second transformer unit is adjusted to the voltage value of the second DC voltage.

14. The power supply device according to claim 9 or 13, characterized in that: A third switch unit is connected between the positive output terminal and the negative output terminal of the second power supply module; the second control unit is also connected to the third switch unit, and the second control unit is also used to control the conduction or shutdown of the third switch unit based on the control of the first power supply module.

15. The power supply device according to claim 14, characterized in that: The second control unit of the second power supply module is also used to control the connected third switch unit to turn on so as to short-circuit the positive output terminal and the negative output terminal of the second power supply module when the voltage value of the second DC voltage sent by the first control unit is 0, or when the first control instruction sent by the first control unit is received.

16. The power supply device according to any one of claims 1 to 4, characterized in that: The negative input terminal of the charging interface is connected to the negative output terminal of the first power supply module, and the positive input terminal of the charging interface is connected to the positive output terminal of the second power supply module; Alternatively, the positive input terminal of the charging interface is connected to the positive output terminal of the first power supply module, and the negative input terminal of the charging interface is connected to the negative output terminal of the second power supply module.

17. The power supply device according to any one of claims 1 to 4, characterized in that: When multiple second power supply modules are included, the positive input terminal of the charging interface is connected to the positive output terminal of one of the multiple second power supply modules, and the negative input terminal of the charging interface is connected to the negative output terminal of another one of the multiple second power supply modules.

18. The power supply device according to any one of claims 1 to 4, characterized in that: The first power supply module and the second power supply module are stacked up and down in the power supply device.

19. A power supply device, characterized in that: include: A first power supply module, used for converting the received AC voltage into a first DC voltage; A second power supply module, wherein the output end of the second power supply module is connected in series with the output end of the first power supply module, and is used to convert the received AC voltage into a second DC voltage; the number of the second power supply module is at least one; a charging interface, connected to the first power supply module and the second power supply module respectively, and used to provide an output voltage whose voltage value is the sum of the voltage value of the first DC voltage and the voltage value of the second DC voltage; as well as a control unit, connected to the first power supply module and the second power supply module respectively, and used to determine the voltage value of the first DC voltage and the voltage value of the second DC voltage; the second DC voltage is a constant DC voltage or a pulsating DC voltage; The control unit is further used to determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the battery cell status fed back by the device to be charged, and to set the voltage value of the second DC voltage to 0 when the battery of the device to be charged contains only a single battery cell, and to charge the device to be charged in conjunction with the second power supply module when the battery of the device to be charged contains multiple batteries connected in series; Alternatively, the control unit is further used to determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging stage fed back by the device to be charged, set the voltage value of the second DC voltage to 0 when the device to be charged is in the trickle charging stage and / or the constant voltage charging stage, and charge the device to be charged in combination with the second power supply module when the device to be charged is in the constant current charging stage.

20. The power supply device according to claim 19, characterized in that: The control unit is further used to receive a request message sent by an electronic device connected to the power supply device, and determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the request message.

21. The power supply device according to claim 20, characterized in that: The request message includes: a charging voltage value requested by the electronic device; and the control unit is configured to determine a voltage value of the first DC voltage and a voltage value of the second DC voltage according to the charging voltage value.

22. The power supply device according to claim 20, characterized in that: The request message includes: the gear information selected by the electronic device; the control unit is used to determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value corresponding to the gear information; wherein the gear information is one of a plurality of gear information negotiated by the electronic device and the power supply device, and each gear information corresponds to a different voltage range and current range.

23. The power supply device according to claim 21 or 22, characterized in that: The control unit is used to determine that the voltage value of the second DC voltage is 0 when the charging voltage value is less than or equal to a first threshold value; when the charging voltage value is greater than the first threshold value and less than or equal to a second threshold value, determine that the voltage value of the first DC voltage is a first voltage value, and the voltage value of the second DC voltage is the difference between the charging voltage value and the first voltage value; When the charging voltage value is greater than the second threshold, the voltage value of the first DC voltage is determined to be a second voltage value, and the voltage value of the second DC voltage is the difference between the charging voltage value and the second voltage value; wherein the second voltage value is greater than the first voltage value.

24. The power supply device according to claim 20, characterized in that: The first power supply module includes: a first conversion circuit and a second conversion circuit; wherein the first conversion circuit is used to convert the received AC voltage into a first pulsating DC voltage, and the voltage value of the first pulsating DC voltage is higher than the voltage value of the AC voltage; the second conversion circuit is connected to the first conversion circuit, and is used to convert the first pulsating DC voltage and output the first DC voltage.

25. The power supply device according to claim 24, characterized in that: The second conversion circuit includes: a first switch unit and a first transformer unit; the first power supply module also includes: a first detection unit, connected to the first transformer unit, for detecting the output voltage value and / or current value of the first transformer unit; the control unit is respectively connected to the first detection unit and the first switch unit, and is also used to control the first switch unit to be turned on or off by outputting a control signal according to the output voltage value and / or current value of the first transformer unit detected by the first detection unit, so as to adjust the voltage value of the output voltage of the first transformer unit to the voltage value of the first DC voltage.

26. The power supply device according to claim 25, characterized in that: The second power supply module includes: a third conversion circuit and a fourth conversion circuit; wherein the third conversion circuit is used to convert the received AC voltage into a second pulsating DC voltage, and the voltage value of the second pulsating DC voltage is higher than the voltage value of the AC voltage; the fourth conversion circuit is respectively connected to the control unit and the third conversion circuit, and is used to convert the second pulsating DC voltage and output the second DC voltage.

27. The power supply device according to claim 26, characterized in that: The fourth conversion circuit includes: a second switch unit and a second transformer unit; the first power supply module also includes: a second detection unit; wherein the second detection unit is connected to the second transformer unit, and is used to detect the output voltage value and / or current value of the second transformer unit; the control unit is respectively connected to the second detection unit and the second switch unit, and is also used to control the second switch unit to be turned on or off by outputting a control signal according to the output voltage value and / or current value of the second transformer unit detected by the second detection unit, so as to adjust the voltage value of the output voltage of the second transformer unit to the voltage value of the second DC voltage.

28. The power supply device according to any one of claims 24 to 27, characterized in that: A third switch unit is connected between the positive output terminal and the negative output terminal of the second power supply module; the control unit is also connected to the third switch unit, and the control unit is also used to control the on or off of the switch unit.

29. The power supply device according to claim 28, characterized in that: The control unit is further configured to control the connected third switch unit to be turned on when it is determined that the voltage value of the second DC voltage is 0, so as to short-circuit the positive output terminal and the negative output terminal of the second power supply module.

30. The power supply device according to any one of claims 19 to 22, characterized in that: The negative input terminal of the charging interface is connected to the negative output terminal of the first power supply module, and the positive input terminal of the charging interface is connected to the positive output terminal of the second power supply module; Alternatively, the positive input terminal of the charging interface is connected to the positive output terminal of the first power supply module, and the negative input terminal of the charging interface is connected to the negative output terminal of the second power supply module.

31. The power supply device according to any one of claims 19 to 22, characterized in that: When multiple second power supply modules are included, the positive input terminal of the charging interface is connected to the positive output terminal of one of the multiple second power supply modules, and the negative input terminal of the charging interface is connected to the negative output terminal of another one of the multiple second power supply modules.

32. The power supply device according to any one of claims 19 to 22, characterized in that: The first power supply module and the second power supply module are stacked up and down in the power supply device.

33. A charging control method, applied to a power supply device, characterized in that: include: The received AC voltage is converted into a first DC voltage by a first power supply module in the power supply device; The received AC voltage is converted into a second DC voltage by a second power supply module of the power supply device; and Providing, through the charging interface of the power supply device, an output voltage whose voltage value is the sum of the voltage value of the first DC voltage and the voltage value of the second DC voltage; The voltage value of the second DC voltage is determined by the first power supply module; the number of the second power supply module is at least one; the second DC voltage is a constant DC voltage or a pulsating DC voltage; Determining the voltage value of the first DC voltage and the voltage value of the second DC voltage by the first power supply module in the power supply device includes: Determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the battery cell status fed back by the device to be charged, set the voltage value of the second DC voltage to 0 when the battery of the device to be charged contains only a single battery cell, and charge the device to be charged in conjunction with the second power supply module when the battery of the device to be charged contains multiple battery cells connected in series; Determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging stage fed back by the device to be charged, set the voltage value of the second DC voltage to 0 when the device to be charged is in the trickle charging stage and / or the constant voltage charging stage, and charge the device to be charged in combination with the second power supply module when the device to be charged is in the constant current charging stage.

34. The charging control method according to claim 33, characterized in that: Also includes: Receiving, by a first control unit in the first power supply module, a request message sent by an electronic device connected to the power supply device; as well as The first control unit determines a voltage value of the first DC voltage and a voltage value of the second DC voltage according to the request message.

35. The charging control method according to claim 34, characterized in that: The request message includes: the charging voltage value requested by the electronic device; Determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the request message by the first control unit includes: determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value by the first control unit.

36. The charging control method according to claim 34, characterized in that: The request message includes: gear information selected by the electronic device; Determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the request message by the first control unit, including: determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value corresponding to the gear information by the first control unit; The gear information is one of a plurality of gear information negotiated between the electronic device and the power supply device, and each gear information corresponds to a different voltage range and current range.

37. The charging control method according to claim 35 or 36, characterized in that: Determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value by the first control unit includes: When the charging voltage value is less than or equal to a first threshold value, determining, by the first control unit, that the voltage value of the second DC voltage is 0; When the charging voltage value is greater than the first threshold value and less than or equal to the second threshold value, the first control unit determines that the voltage value of the first DC voltage is the first voltage value, and the voltage value of the second DC voltage is the difference between the charging voltage value and the first voltage value; When the charging voltage value is greater than the second threshold value, the first control unit determines that the voltage value of the first DC voltage is a second voltage value, and the voltage value of the second DC voltage is the difference between the charging voltage value and the second voltage value; Wherein, the second voltage value is greater than the first voltage value.

38. The charging control method according to claim 34, characterized in that: The first power supply module in the power supply device converts the received AC voltage into a first DC voltage, including: Through the first voltage conversion unit in the first power supply module, according to the control of the first control unit, the voltage value of the output voltage of the first power supply module is adjusted to the voltage value of the first DC voltage.

39. The charging control method according to claim 38, characterized in that: The received AC voltage is converted into a second DC voltage by a second power supply module of the power supply device, including: receiving, through a second control unit in the second power supply module, a voltage value of the second DC voltage sent by the first control unit; Through the second voltage conversion unit in the second power supply module, according to the control of the second control unit, the output voltage of the second power supply module is adjusted to the voltage value of the second DC voltage.

40. The charging control method according to claim 34, characterized in that: The first power supply module in the power supply device converts the received AC voltage into a first DC voltage, including: The received AC voltage is converted into a first pulsating DC voltage by a first conversion circuit in the first power supply module, wherein a voltage value of the first pulsating DC voltage is higher than a voltage value of the AC voltage; The first pulsating DC voltage is converted by a second conversion circuit in the second power supply module to output the first DC voltage.

41. The charging control method according to claim 40, characterized in that: The first pulsating DC voltage is converted by a second conversion circuit in the second power supply module to output the first DC voltage, including: Detecting an output voltage value and / or current value of a first voltage conversion unit in the second conversion circuit by a first detection unit in the first power supply module; The first control unit controls the first switch unit in the second conversion circuit to be turned on or off by outputting a control signal based on the output voltage value and / or current value of the first transformer unit detected by the first detection unit, and adjusts the voltage value of the output voltage of the first transformer unit to the voltage value of the first DC voltage.

42. The charging control method according to claim 41, characterized in that: The received AC voltage is converted into a second DC voltage by a second power supply module of the power supply device, including: The received AC voltage is converted into a second pulsating DC voltage by a third conversion circuit in the second power supply module, wherein a voltage value of the second pulsating DC voltage is higher than a voltage value of the AC voltage; The second pulsating DC voltage is converted by a fourth conversion circuit in the second power supply module to output the second DC voltage.

43. The charging control method according to claim 42, characterized in that: The second pulsating DC voltage is converted by a fourth conversion circuit in the second power supply module to output the second DC voltage, comprising: Detecting an output voltage value and / or current value of a second voltage conversion unit in the fourth conversion circuit by a second detection unit in the second power supply module; The second control unit in the second power supply module communicates with the first control unit to receive the voltage value of the second DC voltage sent by the first control unit; and according to the output voltage value and / or current value of the second transformer unit detected by the second detection unit, an output control signal controls the second switch in the fourth conversion circuit to be turned on or off, and adjusts the voltage value of the output voltage of the second transformer unit to the voltage value of the second DC voltage.

44. The charging control method according to claim 39 or 43, characterized in that: Also includes: The second control unit controls the on or off of the third switch unit connected between the positive output terminal and the negative output terminal of the second power supply module based on the control of the first power supply module.

45. The charging control method according to claim 44, characterized in that: Controlling the on or off of a third switch unit connected between the positive output terminal and the negative output terminal of the second power supply module by the second control unit based on the control of the first power supply module includes: Through the second control unit, when the voltage value of the second DC voltage sent by the first control unit is 0, or when the first control instruction sent by the first control unit is received, the connected third switch unit is controlled to be turned on to short-circuit the positive output terminal and the negative output terminal of the second power supply module.

46. ​​A charging control method, applied to a power supply device, characterized in that: include: Converting the received AC voltage into a first DC voltage by a first power supply module in the power supply device; The received AC voltage is converted into a second DC voltage by a second power supply module in the power supply device; Determining the voltage value of the first DC voltage and the voltage value of the second DC voltage by a control unit in the power supply device; Providing, through the charging interface of the power supply device, an output voltage whose voltage value is the sum of the voltage value of the first DC voltage and the voltage value of the second DC voltage; The number of the second power supply module is at least one; the second DC voltage is a constant DC voltage or a pulsating DC voltage; Determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the battery cell status fed back by the device to be charged through the first power supply module in the power supply providing device, set the voltage value of the second DC voltage to 0 when the battery of the device to be charged contains only a single battery cell, and charge the device to be charged in conjunction with the second power supply module when the battery of the device to be charged contains multiple battery cells connected in series; Or, through the first power supply module in the power supply providing device, the voltage value of the first DC voltage and the voltage value of the second DC voltage are determined according to the charging stage fed back by the device to be charged, and the voltage value of the second DC voltage is set to 0 when the device to be charged is in the trickle charging stage and / or the constant voltage charging stage, and when the device to be charged is in the constant current charging stage, the second power supply module is used together to charge the device to be charged.

47. The charging control method according to claim 46, characterized in that: Also includes: Receiving, by the control unit, a request message sent by an electronic device connected to the power supply device; The control unit determines a voltage value of the first DC voltage and a voltage value of the second DC voltage according to the request message.

48. The charging control method according to claim 47, characterized in that: The request message includes: the charging voltage value requested by the electronic device; Determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the request message by the control unit includes: determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value by the control unit.

49. The charging control method according to claim 47, characterized in that: The request message includes: gear information selected by the electronic device; The control unit determines the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the request message, including: the control unit determines the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value corresponding to the gear information; wherein the gear information is one of a plurality of gear information negotiated between the electronic device and the power supply device, and each gear information corresponds to a different voltage range and current range.

50. The charging control method according to claim 48 or 49, characterized in that: Determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value by the control unit includes: When the charging voltage value is less than or equal to a first threshold value, determining, by the control unit, that the voltage value of the second DC voltage is 0; When the charging voltage value is greater than the first threshold value and less than or equal to the second threshold value, the control unit determines that the voltage value of the first DC voltage is a first voltage value, and the voltage value of the second DC voltage is a difference between the charging voltage value and the first voltage value; When the charging voltage value is greater than the second threshold value, the control unit determines that the voltage value of the first DC voltage is a second voltage value, and the voltage value of the second DC voltage is the difference between the charging voltage value and the second voltage value; Wherein, the second voltage value is greater than the first voltage value.

51. The charging control method according to claim 47, characterized in that: The first power supply module in the power supply device converts the received AC voltage into a first DC voltage, including: The received AC voltage is converted into a first pulsating DC voltage by a first conversion circuit in the first power supply module, wherein a voltage value of the first pulsating DC voltage is higher than a voltage value of the AC voltage; The first pulsating DC voltage is converted by a second conversion circuit in the second power supply module to output the first DC voltage.

52. The charging control method according to claim 51, characterized in that: The first pulsating DC voltage is converted by a second conversion circuit in the second power supply module to output the first DC voltage, including: Detecting an output voltage value and / or current value of a first voltage conversion unit in the second conversion circuit by a first detection unit in the first power supply module; The control unit controls the first switch unit in the second conversion circuit to be turned on or off by outputting a control signal based on the output voltage value and / or current value of the first transformer unit detected by the first detection unit, and adjusts the voltage value of the output voltage of the first transformer unit to the voltage value of the first DC voltage.

53. The charging control method according to claim 52, characterized in that: The received AC voltage is converted into a second DC voltage by a second power supply module of the power supply device, including: The received AC voltage is converted into a second pulsating DC voltage by a third conversion circuit in the second power supply module, wherein a voltage value of the second pulsating DC voltage is higher than a voltage value of the AC voltage; The second pulsating DC voltage is converted by a fourth conversion circuit in the second power supply module to output the second DC voltage.

54. The charging control method according to claim 53, characterized in that: The second pulsating DC voltage is converted by a fourth conversion circuit in the second power supply module to output the second DC voltage, comprising: Detecting an output voltage value and / or current value of a second voltage conversion unit in the fourth conversion circuit by a second detection unit in the second power supply module; The control unit outputs a control signal to control the second switch in the fourth conversion circuit to be turned on or off based on the output voltage value and / or current value of the second transformer unit detected by the second detection unit, thereby adjusting the voltage value of the output voltage of the second transformer unit to the voltage value of the second DC voltage.

55. The charging control method according to any one of claims 51 to 54, characterized in that: Also includes: The control unit controls the on or off of the third switch unit connected between the positive output terminal and the negative output terminal of the second power supply module.

56. The charging control method according to claim 55, characterized in that: The control unit is used to control the on or off of a third switch unit connected between the positive output terminal and the negative output terminal of the second power supply module, including: when it is determined that the voltage value of the second DC voltage is 0, the control unit is used to control the connected third switch unit to be turned on to short-circuit the positive output terminal and the negative output terminal of the second power supply module.

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