A charger and charging combination

Abstract

The utility model relates to the technical field of charger, disclose a kind of charger and charging combination, and charger includes: AC input interface, USB interface, first battery pack interface and second battery pack interface;Further include: primary power conversion module, it connects AC input interface, receives alternating current input and is converted into first direct current;First voltage regulating module is used to handle the direct current of input to export from first battery pack interface;Second voltage regulating module is used to handle the direct current of input to export from second battery pack interface;Third voltage regulating module is used to handle the direct current of input to export from USB interface;Controller, connection controls first voltage regulating module, second voltage regulating module and third voltage regulating module;First voltage regulating module and second voltage regulating module are DC-DC voltage regulating module with isolation function.The utility model has two battery pack interfaces and USB interface can achieve stable output, can effectively prevent the advantages that two battery packs between each other charge.

Description

Technical Field

[0001] This utility model relates to the field of battery charger technology, and in particular to a charger and charging assembly. Background Technology

[0002] Power tool battery pack chargers are commonly categorized into single-pack chargers and dual-pack chargers, depending on the number of charging ports. With the widespread adoption of consumer electronics, some single-pack chargers have integrated USB ports for charging 3C electronic devices, evolving from single-function chargers to multi-functional chargers (see patent TWM584567U). However, this patent only discloses the functional logic of AC power input through the AC port being processed by the power module and then outputting DC power from the battery pack ports and the USB port; the specific circuit structure is not further explained. Extending this functionality to dual-pack chargers would require at least two battery pack ports and one USB port at the output end. Achieving stable output from multiple ports is a problem to be solved. Furthermore, the states of the two battery packs connected to the ports may differ, potentially leading to mutual charging between the battery packs. These issues hinder the implementation of multi-functional dual-pack charger solutions. Utility Model Content

[0003] The purpose of this invention is to provide a charger and charging assembly. This invention features two battery pack interfaces and a USB interface, enabling stable output and effectively preventing mutual charging between the two battery packs.

[0004] The technical solution of this utility model: In one aspect, this utility model provides a charger, including: an AC input interface for connecting to an AC power source, a USB interface for connecting to an electrical device, and a first battery pack interface and a second battery pack interface for connecting to a battery pack; further comprising:

[0005] The primary power conversion module is connected to the AC input interface, receives AC power input, and converts it into first DC power through primary rectification, filtering, and step-down.

[0006] A first voltage regulating module, corresponding to the first battery pack interface, is used to process the input DC power for output from the first battery pack interface.

[0007] A second voltage regulating module, corresponding to the second battery pack interface, is used to process the input DC power for output from the second battery pack interface.

[0008] A third voltage regulation module, corresponding to the USB interface, is used to process the input DC power for output from the USB interface.

[0009] The controller is connected to and controls the first voltage regulating module, the second voltage regulating module, and the third voltage regulating module.

[0010] Both the first voltage regulating module and the second voltage regulating module are DC-DC voltage regulating modules with isolation function.

[0011] Compared with the prior art, the beneficial effects of this utility model charger are reflected in the following: by setting a first voltage regulating module at the corresponding position of the first battery pack interface, a second voltage regulating module at the corresponding position of the second battery pack interface, and a third voltage regulating module at the corresponding position of the USB interface, and controlling all voltage regulating modules by the controller, it is possible to achieve stable DC power output from each output interface; in addition, the first and second voltage regulating modules are both DC-DC voltage regulating modules with isolation function, so even if there is a voltage difference between the two battery packs connected to the charger, the corresponding voltage regulating modules can play an isolation role, effectively preventing the two battery packs from charging each other, making the charger safer and more reliable to use.

[0012] In the aforementioned charger, both the first voltage regulating module and the second voltage regulating module are bidirectional DC-DC voltage regulating modules.

[0013] In the aforementioned charger, the first voltage regulation module includes a first bidirectional DC-DC chip and a first boost / buck circuit, wherein the first bidirectional DC-DC chip has a built-in boost / buck driver.

[0014] In the aforementioned charger, the second voltage regulation module includes a second bidirectional DC-DC chip and a second boost / buck circuit, wherein the second bidirectional DC-DC chip has a built-in boost / buck driver.

[0015] In the aforementioned charger, the third voltage regulation module includes a SOC chip and a third boost / buck circuit, wherein the SOC chip has a built-in boost / buck driver.

[0016] In the aforementioned charger, the SOC chip integrates the PD / QC fast charging protocol.

[0017] In the aforementioned charger, the primary power conversion module includes a flyback switching power supply and a transformer; the flyback switching power supply includes a flyback PWM control chip and a first switching transistor, the flyback PWM control chip being adapted to generate a PWM signal to control the on / off state of the first switching transistor, and cooperating with the transformer to achieve energy conversion.

[0018] In the aforementioned charger, the first switching transistor is a high-voltage MOS device.

[0019] In the aforementioned charger, the first switching transistor is a gallium nitride MOS device.

[0020] The aforementioned charger further includes a feedback control circuit, which is connected to the output of the flyback PWM control chip and the primary power conversion module. The feedback control circuit is used to receive feedback signals from the output of the primary power conversion module to adjust the duty cycle of the first switching transistor. The feedback control circuit is also connected to the controller.

[0021] The aforementioned charger further includes a parameter detection unit connected to the controller, which is used to detect the electrical parameters at the first battery pack interface, the second battery pack interface, and the USB interface in real time.

[0022] In the aforementioned charger, the charger is also provided with a switching button. The switching button is connected to the controller. When the AC input interface is not connected to an external power source, and the first battery pack interface and / or the second battery pack interface are connected to the battery pack, the switching button is used to control the battery pack's power output to the USB interface.

[0023] In the aforementioned charger, there are multiple USB interfaces, including USB-A interfaces and / or USB-C interfaces.

[0024] The aforementioned charger further includes a secondary power conversion module, which is disposed between the primary power conversion module and the first voltage regulation module, between the primary power conversion module and the second voltage regulation module, and between the primary power conversion module and the third voltage regulation module. The secondary power conversion module is used to receive the first DC input and convert it into a second DC input through secondary rectification and filtering.

[0025] In the aforementioned charger, a second switching transistor is provided between the first voltage regulation module and the secondary power conversion module.

[0026] In the aforementioned charger, a third switching transistor is provided between the second voltage regulation module and the secondary power conversion module.

[0027] In the aforementioned charger, a fourth switching transistor is provided between the third voltage regulation module and the secondary power conversion module.

[0028] In the aforementioned charger, the primary power conversion module further includes an EMI circuit, which is connected to the AC input interface.

[0029] In the aforementioned charger, the primary power conversion module further includes an RCD snubber circuit, which is used to suppress voltage spikes and protect the first switching transistor from breakdown.

[0030] In the aforementioned charger, the transformer is a planar transformer.

[0031] In one aspect, this utility model provides a charging assembly, including the aforementioned charger;

[0032] And a first battery pack and a second battery pack, wherein the first battery pack is connected to the first battery pack interface and the second battery pack is connected to the second battery pack interface;

[0033] When there is no input at the AC input interface, the power of the first battery pack can be output to the USB interface through the first voltage regulation module and the third voltage regulation module, and the power of the second battery pack can be output to the USB interface through the second voltage regulation module and the third voltage regulation module. The controller identifies the electrical parameters of the first battery pack and the second battery pack, and adjusts the first voltage regulation module and the second voltage regulation module according to the electrical parameters of the first battery pack and the second battery pack, so that the sum of the power output by the first voltage regulation module and the second voltage regulation module is constant.

[0034] Compared with the prior art, the beneficial effects of the charging combination of this utility model are reflected in the following: when there is no input at the AC input interface, the battery pack of the charging combination can reverse power the USB interface, and two battery packs can output power to the outside at the same time, so that the total available power is greater; depending on the state of the two battery packs, the output power can be adjusted by the first voltage regulation module and the second voltage regulation module, so that the sum of the output power is constant. While achieving stable power output, the use of the two battery packs is more reasonable and efficient. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the charger structure according to an embodiment of the present utility model;

[0036] Figure 2 This is a schematic diagram of the charging assembly structure according to an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the charger circuit according to an embodiment of the present invention.

[0038] Reference numerals: 1. Charger; 11. AC input interface; 12. USB interface; 13. First battery pack interface; 14. Second battery pack interface; 15. Primary power conversion module; 16. First voltage regulation module; 17. Second voltage regulation module; 18. Third voltage regulation module; 19. Controller; 101. Feedback control circuit; 102. Parameter detection unit; 103. Switch button; 104. Secondary power conversion module; 105. Second switching transistor; 106. Third switching transistor; 107. Fourth switching transistor; 151. Transformer; 152. Flyback PWM control chip; 153. First switching transistor; 154. EMI circuit; 155. RCD absorption circuit; 200. First battery pack; 300. Second battery pack. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0040] This utility model embodiment provides a charger 1, the structure of which is as follows: Figure 1 As shown, the circuit principle is as follows: Figure 3 As shown, it includes: an AC input interface 11 for connecting to an AC power source, a USB interface 12 for connecting to an electrical device, and a first battery pack interface 13 and a second battery pack interface 14 for connecting to a battery pack; it also includes:

[0041] The primary power conversion module 15 is connected to the AC input interface 11, receives AC power input and converts it into first DC power through primary rectification, filtering and step-down;

[0042] The first voltage regulating module 16, which is provided corresponding to the first battery pack interface 13, is used to process the input DC power and output it to the outside from the first battery pack interface 13;

[0043] The second voltage regulating module 17, which is provided corresponding to the second battery pack interface 14, is used to process the input DC power and output it to the outside from the second battery pack interface 14;

[0044] The third voltage regulation module 18, which is provided corresponding to the USB interface 12, is used to process the input DC power for output from the USB interface 12.

[0045] Controller 19 is connected to control the first voltage regulating module 16, the second voltage regulating module 17 and the third voltage regulating module 18;

[0046] The first voltage regulating module 16 and the second voltage regulating module 17 are both DC-DC voltage regulating modules with isolation function.

[0047] Optionally, the mechanical structures of the first battery pack interface 13 and the second battery pack interface 14 can be the same or different. That is, the two battery packs connected to the charger 1 can be the same battery pack or different battery packs, and different combination schemes can be selected according to different usage requirements.

[0048] In this embodiment, the mechanical structures of the first battery pack interface 13 and the second battery pack interface 14 are the same, that is, the interfaces of the two battery packs connected to the charger 1 are at least the same, but the capacities of the battery packs themselves may be different.

[0049] In this embodiment, the primary power conversion module 15 is connected to the AC input interface 11, receives AC input, and converts it into first DC power through primary rectification, filtering, and step-down. Specifically, the AC power is converted into pulsating DC power through a rectifier bridge, then filtered by capacitors and inductors, and finally stepped down by transformer 151 to generate smooth first DC power.

[0050] Optionally, the AC input interface 11 can be directly connected to AC mains power (such as 220V AC power) or an external AC power source via an AC cable to receive AC power. More preferably, the AC input interface 11 can allow wide voltage input, such as 100V-240V, to adapt to global power grid standards.

[0051] Optionally, the devices connected to the USB interface 12 include, but are not limited to, mobile devices such as mobile phones, tablets, and computers.

[0052] Optionally, both the first voltage regulating module 16 and the second voltage regulating module 17 are bidirectional DC-DC voltage regulating modules.

[0053] In this embodiment, when the AC input interface 11 is not connected to an external power source, the two battery packs can output to the USB interface 12 in reverse through the adjustment of the first voltage regulating module 16 and the second voltage regulating module 17. The bidirectional DC-DC voltage regulating module can realize this function.

[0054] Optionally, the first voltage regulating module 16 includes a first bidirectional DC-DC chip and a first boost / buck circuit, wherein the first bidirectional DC-DC chip has a built-in boost / buck driver.

[0055] In this embodiment, the first boost / buck circuit can adjust the output power of the first battery pack interface 13. Specifically, the first bidirectional DC-DC chip (with built-in boost / buck driver) drives the first boost / buck circuit to work according to the charging requirements of the first battery pack. If the first battery pack needs to be bucked, the first boost / buck circuit is adjusted in buck mode; if it needs to be boosted, it works in boost mode, ultimately achieving a stable output of voltage and current from the first battery pack interface 13.

[0056] Optionally, the second voltage regulating module 17 includes a second bidirectional DC-DC chip and a second boost / buck circuit, wherein the second bidirectional DC-DC chip has a built-in boost / buck driver.

[0057] In this embodiment, the second boost / buck circuit can adjust the output power of the second battery pack interface 14. Specifically, the second bidirectional DC-DC chip (with built-in boost / buck driver) drives the second boost / buck circuit to work according to the charging requirements of the second battery pack. If the second battery pack needs to be bucked, the second boost / buck circuit is adjusted in buck mode; if it needs to be boosted, it works in boost mode, ultimately achieving stable output of voltage and current of the second battery pack interface 14.

[0058] Optionally, the third voltage regulation module 18 includes a SOC chip and a third boost / buck circuit, with the SOC chip having a built-in boost / buck driver.

[0059] In this embodiment, the third boost / buck circuit can adjust the output power of the USB interface 12. Specifically, the SOC chip (with built-in boost / buck driver) drives the third boost / buck circuit to work according to the charging requirements of the device connected to the USB interface 12. If the charging device needs to step down, the third boost / buck circuit adjusts in buck mode; if it needs to step up, it works in boost mode, ultimately achieving a stable output of voltage and current from the USB interface 12.

[0060] Optionally, the SOC chip integrates the PD / QC fast charging protocol, which can automatically match the PD / QC protocol to achieve output from the USB interface 12.

[0061] Among them, PD protocol, or USB Power Delivery protocol, is a power transfer protocol based on the USB Type-C interface. It enables higher power transfer (up to 100W or even higher) and supports dynamic adjustment of output voltage and current to meet the charging needs of different devices. For example, some laptops can obtain 20V, 3A or even higher power charging support through the PD protocol.

[0062] QC protocol, or Quick Charge protocol, is a fast charging protocol developed by Qualcomm, primarily used in mobile devices that support Qualcomm chips. Different versions of the QC protocol support different combinations of output voltage and current. For example, QC 3.0 can dynamically adjust the voltage in 0.2V increments within a range of 3.6V-20V to achieve fast charging.

[0063] When a device is plugged into USB port 12, the SOC chip first identifies the connected device. By detecting the communication signals between the device and the port, the SOC chip determines the type of fast charging protocol supported by the device (whether it is the PD protocol or the QC protocol, and the specific protocol version). For example, the SOC chip will detect specific communication messages sent by the device and determine the protocol supported by the device based on the protocol identification information in the message.

[0064] Once the fast charging protocol supported by the device is identified, the SOC chip will initiate a protocol handshake process with the device. During this process, the SOC chip will communicate with the device according to the corresponding protocol standard, exchanging charging parameter information, such as the output voltage and current required by the device. For example, for devices supporting the PD protocol, the chip will negotiate the output voltage and current with the device to determine the optimal charging power. For instance, if the device sends a request for 15V / 3A charging power, the SOC chip will respond and adjust accordingly.

[0065] Based on the handshake result, the SOC chip adjusts the output voltage and current of USB interface 12 to meet the charging needs of the device. If the device supports the PD protocol and requests 15V / 3A charging power, the SOC chip controls the third boost / buck circuit to adjust the output voltage to 15V and limit the output current to within 3A, achieving fast charging.

[0066] As mentioned above, it can be understood that USB port 12 complies with the PD / QC fast charging protocol and has a maximum output of no more than 100W, for example, a maximum output of 45W. It has charging powers of 5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, and 20V / 2.25A.

[0067] Optionally, the primary power conversion module 15 includes a flyback switching power supply and a transformer 151; the flyback switching power supply includes a flyback PWM control chip 152 and a first switching transistor 153. The flyback PWM control chip 152 is adapted to generate a PWM signal to control the on / off of the first switching transistor 153, and works with the transformer 151 to achieve energy conversion. The first switching transistor 153 is a gallium nitride MOS device.

[0068] Optionally, the charger 1 also includes a feedback control circuit 101, which is connected to the output of the flyback PWM control chip 152 and the primary power conversion module 15. The feedback control circuit 101 is used to receive the feedback signal from the output of the primary power conversion module 15 to adjust the duty cycle of the first switching transistor 153. The feedback control circuit 101 is also connected to the controller 19.

[0069] In this embodiment, when the PWM signal generated by the flyback PWM control chip 152 is high, the first switch 153 (such as a gallium nitride MOS device) is turned on; when the PWM signal becomes low, the first switch 153 (such as a gallium nitride MOS device) is turned off.

[0070] Optionally, the charger 1 further includes a secondary power conversion module 104, which is disposed between the primary power conversion module 15 and the first voltage regulation module 16, between the primary power conversion module 15 and the second voltage regulation module 17, and between the primary power conversion module 15 and the third voltage regulation module 18. It is used to receive the first DC power input and convert it into the second DC power through secondary rectification and filtering.

[0071] In this embodiment, the feedback control circuit 101 is electrically connected to the output terminals of the flyback PWM control chip 152 and the primary power conversion module 15, specifically to the output terminal of the secondary power conversion module 104. The feedback control circuit 101 samples the second DC current as a sampling signal. After the sampling signal is fed back to the flyback PWM control chip 152, it is compared with the reference voltage inside the chip. If there is a deviation between the sampling signal and the reference voltage, the flyback PWM control chip 152 will generate a corresponding control signal based on this deviation to adjust the duty cycle of the first switching transistor 153 to adapt to load changes.

[0072] For example, when the sampled signal is lower than the reference voltage, the flyback PWM control chip 152 will increase the duty cycle of the first switching transistor 153; when the sampled signal is higher than the reference voltage, the flyback PWM control chip 152 will decrease the duty cycle of the first switching transistor 153.

[0073] It is understandable that in actual operation, the connected load (such as battery pack and USB device) of charger 1 may change. Different loads have different power requirements. When the load changes, the output current will also change. If it is not adjusted, the output voltage will be affected. By adjusting the duty cycle of the first switching transistor 153, the flyback switching power supply can dynamically adjust the output power according to the load change, thereby ensuring the stability of the output voltage.

[0074] Furthermore, gallium nitride (GaN) MOS devices can withstand higher voltages, making them well-suited for high-voltage input flyback switching power supplies. They can achieve higher voltage conversion ratios while ensuring safe and reliable operation. Moreover, GaN MOS devices have low on-resistance, resulting in minimal power loss when current flows through the switching transistor in the on-state. Therefore, using GaN MOS devices in flyback switching power supplies can effectively reduce transistor heat generation, improve power supply conversion efficiency, and also provide high switching speeds, allowing flyback switching power supplies to operate at higher frequencies. This, in turn, reduces the size of magnetic components such as the transformer 151, enabling miniaturized power supply designs.

[0075] Optionally, a second switch 105 is provided between the first voltage regulating module 16 and the secondary power conversion module 104. Its on / off state directly controls whether the battery pack at the first battery pack interface 13 is charged. When the second switch 105 is on, the second DC power output by the secondary power conversion module 104 can charge the first battery pack through the first battery pack interface 13; when the second switch 105 is off, the charging path is cut off, and the first battery pack stops charging.

[0076] Optionally, a third switch 106 is provided between the second voltage regulating module 17 and the secondary power conversion module 104. Its on / off state directly controls whether the battery pack at the second battery pack interface 14 is charged. When the third switch 106 is on, the second DC power output by the secondary power conversion module 104 can charge the second battery pack through the second battery pack interface 14; when the third switch 106 is off, the charging path is cut off, and the second battery pack stops charging.

[0077] Optionally, a fourth switch 107 is provided between the third voltage regulating module 18 and the secondary power conversion module 104 to control the discharge of the USB interface 12. When the fourth switch 107 is turned on, the second DC power can supply power to connected devices supporting the PD protocol through the USB interface 12; when the fourth switch 107 is turned off, the USB interface 12 stops outputting power.

[0078] Optionally, the primary power conversion module 15 also includes an EMI circuit 154, which is connected to the AC input interface 11 and is used to suppress electromagnetic interference.

[0079] Optionally, the primary power conversion module 15 also includes an RCD snubber circuit 155. The RCD snubber circuit 155 is used to suppress voltage spikes and protect the first switching transistor 153 from breakdown. The RCD snubber circuit 155 can absorb and dissipate the energy of the voltage spike, so that the voltage across the first switching transistor 153 is always kept within its withstand voltage range, thus avoiding breakdown damage caused by excessively high voltage spikes.

[0080] Optionally, the charger 1 also includes a parameter detection unit 102, which is connected to the controller 19 and is used to detect the electrical parameters at the first battery pack interface 13, the second battery pack interface 14, and the USB interface 12 in real time.

[0081] In this embodiment, electrical parameters may include voltage, current, and other electrical parameters. By collecting these electrical parameters, the charging and discharging status of the battery pack and the charging status of the electrical equipment can be fed back in real time.

[0082] Optionally, the charger 1 is also provided with a switching button 103, which is connected to the controller 19. When the AC input interface 11 is not connected to an external power source, and the first battery pack interface 13 and / or the second battery pack interface 14 are connected to the battery pack, the switching button 103 is used to control the battery pack's power output to the USB interface 12. It can be understood that the function of the battery pack to output its own power to the outside through the USB interface 12 is only activated when the switching button 103 is pressed.

[0083] In this embodiment, the switching button 103 is provided to improve the safety of the charging combination and to save some power consumption because the battery pack discharge circuit is in a dormant state before the switching button 103 is pressed.

[0084] Optionally, the number of USB ports 12 may be multiple, including USB-A ports and / or USB-C ports, to meet the charging needs of more 3C electronic devices.

[0085] In this embodiment, there are three USB ports 12, including one USB-A port and two USB-C ports, which can be adapted to most 3C electronic devices on the market.

[0086] Optionally, the transformer 151 is preferably a high-frequency transformer with an operating frequency ≥20kHz, such as 50kHz. Furthermore, in order to reduce the size of the charger 1, the high-frequency transformer can be a planar transformer.

[0087] Another embodiment of this utility model provides a charging assembly, see reference. Figure 2 It includes a charger 1, a first battery pack 200 and a second battery pack 300, the first battery pack 200 is connected to the first battery pack interface 13, and the second battery pack 300 is connected to the second battery pack interface 14.

[0088] When there is no input at the AC input interface 11, the power of the first battery pack 200 can be output to the USB interface 12 through the first voltage regulating module 16 and the third voltage regulating module 18, and the power of the second battery pack 300 can be output to the USB interface 12 through the second voltage regulating module 17 and the third voltage regulating module 18. The controller 19 identifies the electrical parameters of the first battery pack 200 and the second battery pack 300, and adjusts the first voltage regulating module 16 and the second voltage regulating module 17 according to the electrical parameters of the first battery pack 200 and the second battery pack 300, so that the sum of the power output by the first voltage regulating module 16 and the second voltage regulating module 17 is constant.

[0089] Among them, the first voltage regulating module 16 and the third voltage regulating module 18 achieve constant total output power through cooperation with the second switch tube 105 and the third switch tube 106. There are multiple specific output strategies for the battery pack.

[0090] The output strategy can be: the first battery pack 200 and the second battery pack 300 discharge simultaneously, with the battery pack with higher charge outputting more power.

[0091] The output strategy can also be: one of the first battery pack 200 and the second battery pack 300 discharges while the other does not discharge. When the battery pack discharges to the point where it can no longer maintain the rated power, the other battery pack takes over the discharge.

[0092] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0093] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A charger, comprising: An AC input interface (11) for connecting to an AC power source, a USB interface (12) for connecting to an electrical device, and a first battery pack interface (13) and a second battery pack interface (14) for connecting to a battery pack. Its characteristic is that it further includes: The primary power conversion module (15) is connected to the AC input interface (11), receives AC power input and converts it into first DC power through primary rectification, filtering and step-down; A first voltage regulating module (16) is provided corresponding to the first battery pack interface (13) for processing the input DC power to output it from the first battery pack interface (13); A second voltage regulating module (17) is provided corresponding to the second battery pack interface (14) for processing the input DC power to output it to the outside from the second battery pack interface (14); A third voltage regulating module (18) corresponding to the USB interface (12) is used to process the input DC power for output from the USB interface (12); The controller (19) is connected to control the first voltage regulating module (16), the second voltage regulating module (17) and the third voltage regulating module (18). Both the first voltage regulating module (16) and the second voltage regulating module (17) are DC-DC voltage regulating modules with isolation function.

2. The charger according to claim 1, characterized in that, Both the first voltage regulating module (16) and the second voltage regulating module (17) are bidirectional DC-DC voltage regulating modules.

3. The charger according to claim 2, characterized in that, The first voltage regulating module (16) includes a first bidirectional DC-DC chip and a first boost / buck circuit, wherein the first bidirectional DC-DC chip has a built-in boost / buck driver.

4. The charger according to claim 2, characterized in that, The second voltage regulating module (17) includes a second bidirectional DC-DC chip and a second boost / buck circuit, wherein the second bidirectional DC-DC chip has a built-in boost / buck driver.

5. The charger according to claim 1, characterized in that, The third voltage regulation module (18) includes a SOC chip and a third boost / buck circuit, wherein the SOC chip has a built-in boost / buck driver.

6. The charger according to claim 5, characterized in that, The SOC chip integrates the PD / QC fast charging protocol.

7. The charger according to claim 1, characterized in that, The primary power conversion module (15) includes a flyback switching power supply and a transformer (151); the flyback switching power supply includes a flyback PWM control chip (152) and a first switching transistor (153). The flyback PWM control chip (152) is adapted to generate a PWM signal to control the on / off state of the first switching transistor (153) and cooperate with the transformer (151) to achieve energy conversion.

8. The charger according to claim 7, characterized in that, The first switch (153) is a high-voltage MOS device.

9. The charger according to claim 8, characterized in that, The first switch (153) is a gallium nitride MOS device.

10. The charger according to claim 7, 8 or 9, characterized in that, The charger also includes a feedback control circuit (101), which is connected to the output of the flyback PWM control chip (152) and the primary power conversion module (15). The feedback control circuit (101) is used to receive the feedback signal from the output of the primary power conversion module (15) to adjust the duty cycle of the first switching transistor (153). The feedback control circuit (101) is also connected to the controller (19).

11. The charger according to claim 1, characterized in that, The charger is also equipped with a switching button (103), which is connected to the controller (19). When the AC input interface (11) is not connected to an external power source, and the first battery pack interface (13) and / or the second battery pack interface (14) are connected to the battery pack, the switching button (103) is used to control the power of the battery pack to be output to the USB interface (12).

12. The charger according to claim 1, characterized in that, The number of USB interfaces (12) is multiple, including USB-A interfaces and / or USB-C interfaces.

13. The charger according to claim 1, characterized in that, The charger also includes a secondary power conversion module (104), which is disposed between the primary power conversion module (15) and the first voltage regulation module (16), between the primary power conversion module (15) and the second voltage regulation module (17), and between the primary power conversion module (15) and the third voltage regulation module (18). It is used to receive the first DC input and convert it into the second DC through secondary rectification and filtering.

14. A charging assembly, characterized in that, Includes the charger as described in any one of claims 1-13; And a first battery pack (200) and a second battery pack (300), wherein the first battery pack (200) is connected to the first battery pack interface (13) and the second battery pack (300) is connected to the second battery pack interface (14). When there is no input to the AC input interface (11), the power of the first battery pack (200) can be output to the USB interface (12) through the first voltage regulating module (16) and the third voltage regulating module (18), and the power of the second battery pack (300) can be output to the USB interface (12) through the second voltage regulating module (17) and the third voltage regulating module (18). The controller (19) identifies the electrical parameters of the first battery pack (200) and the second battery pack (300), and adjusts the first voltage regulating module (16) and the second voltage regulating module (17) according to the electrical parameters of the first battery pack (200) and the second battery pack (300) so that the sum of the power output by the first voltage regulating module (16) and the second voltage regulating module (17) is constant.

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