Charger

Abstract

The utility model relates to a charger which comprises N charging interfaces, a discharging interface and a charging conversion module, and N is a positive integer greater than or equal to 2. The N charging interfaces can be connected with N charging sources in a one-to-one correspondence manner, and the discharging interface is connected with electric equipment; the charging conversion module is used for switching a charging source among the N charging sources to serve as a power supply of the electric equipment, and the charging conversion module keeps supplying power to the electric equipment in the charging source switching process. The charger can ensure that the electric equipment is not powered off when the mobile power supply is replaced.

Description

Technical Field

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

[0002] A charger is a common electronic device, and electrical devices can obtain power from a charging source through the charger.

[0003] At present, the commonly used charger on the market is a 1-input 2-output charger, which has one charging interface and two power supply interfaces. In order to allow users to move when using electrical devices, a mobile power supply is usually provided. The 1-input 2-output charger is connected to the mobile power supply to power the electrical devices. However, due to the limited power of the mobile power supply, when the power of the mobile power supply is insufficient, the 1-input 2-output charger can only be replaced with a new mobile power supply. However, replacing the new mobile power supply will cause the electrical device to be powered off, which brings a bad experience to the user. Summary of the invention

[0004] Based on this, it is necessary to provide a charger that can ensure that the power-consuming device will not be powered off when the mobile power source is replaced.

[0005] A charger, comprising N charging interfaces, a discharging interface and a charging conversion module, wherein N is a positive integer greater than or equal to 2;

[0006] The N charging interfaces can be connected to the N charging sources in a one-to-one correspondence, and the discharging interface is connected to the electrical equipment;

[0007] The charging conversion module is used to switch a charging source among the N charging sources as the power supply for the electric device, wherein the charging conversion module maintains power supply to the electric device during the process of switching the charging source.

[0008] In one of the embodiments, the charging conversion module includes N switch units and a first control unit;

[0009] One end of the N switch units is connected to the N charging interfaces in a one-to-one correspondence, and the other end of the N switch units is connected to the discharging interface;

[0010] The first control unit is connected to the N switch units respectively, and the first control unit is used to control the N switch units to remain open or closed.

[0011] In one of the embodiments, the charging conversion module further includes a second control unit;

[0012] The second control unit is respectively connected to the N charging interfaces and the first control unit;

[0013] The second control unit outputs a power signal to the first control unit according to the remaining power of the N charging sources;

[0014] The first control unit controls the N switch units to remain open or closed according to the power signal.

[0015] In one embodiment, the N charging sources include a first charging source and a second charging source, the N switch units include a first switch unit and a second switch unit, and the power signal includes a first power signal;

[0016] When the remaining power of the first charging source is less than a first preset threshold and the remaining power of the second charging source is greater than a second preset threshold, the second control unit outputs the first power signal to the first control unit;

[0017] The first control unit controls the first switch unit to remain open and controls the second switch unit to remain closed according to the first power signal.

[0018] In one embodiment, the N charging sources include a first charging source and a second charging source, the N switch units include a first switch unit and a second switch unit, and the power signal includes a first power signal;

[0019] When the remaining power of the first charging source is outside the preset discharge interval and the remaining power of the second charging source is within the preset discharge interval, the second control unit outputs the first power signal to the first control unit;

[0020] The first control unit controls the first switch unit to remain open and controls the second switch unit to remain closed according to the first power signal.

[0021] In one embodiment, the N charging sources include a first charging source, a second charging source and a third charging source, the N switch units include a first switch unit, a second switch unit and a third switch unit, and the power signal includes a second power signal;

[0022] When the remaining power of the first charging source is outside the preset discharge interval, the remaining power of the second charging source is greater than the remaining power of the third charging source, and the remaining power of the second charging source is within the preset discharge interval, the second control unit outputs the second power signal to the first control unit;

[0023] The first control unit controls the first switch unit to remain open, controls the second switch unit to remain closed, and controls the third switch unit to remain open according to the second power signal.

[0024] In one embodiment, the N charging sources include a currently used charging source of the power-consuming device and N-1 unused charging sources, and the power signal includes a third power signal and a fourth power signal;

[0025] When the remaining power of the currently used charging source is less than a first preset threshold value, and there is a target charging source whose remaining power is within a preset discharge interval among the N-1 unused charging sources, the second control unit outputs the third power signal to the first control unit;

[0026] The first control unit controls the switch unit corresponding to the target charging source with the highest power to remain closed, and controls the switch units corresponding to all charging sources except the target charging source with the highest power to remain open, according to the third power signal;

[0027] When the remaining power of the currently used charging source is less than the first preset threshold value, and there is no target charging source whose remaining power is within the preset discharge interval among the N-1 unused charging sources, the second control unit outputs the fourth power signal to the first control unit;

[0028] The first control unit controls the switch unit corresponding to the unused charging source with the highest power to remain closed, and controls the switch units corresponding to all charging sources except the unused charging source with the highest power to remain open, according to the fourth power signal.

[0029] In one embodiment, the switch unit includes a MOS tube;

[0030] The drain of the MOS tube is connected to the charging interface corresponding to the MOS tube, the source of the MOS tube is connected to the discharging interface, and the gate of the MOS tube is connected to the first control unit.

[0031] In one embodiment, the N charging interfaces include a first charging interface and a second charging interface, the N switch units include a first switch unit and a second switch unit, and the charging conversion module further includes a first buck-boost unit and a second buck-boost unit;

[0032] The first buck-boost unit and the first switch unit are connected in series between the first charging interface and the discharging interface, and the first buck-boost unit is used to boost or buck the voltage provided by the first charging interface;

[0033] The second buck-boost unit and the second switch unit are connected in series between the second charging interface and the discharging interface, and the second buck-boost unit is used to boost or buck the voltage provided by the second charging interface.

[0034] In one embodiment, the N charging interfaces include a first charging interface and a second charging interface, and the charging conversion module further includes a third buck-boost unit and a fourth buck-boost unit;

[0035] One end of the third buck-boost unit is connected to the first charging interface, and the other end of the third buck-boost unit is connected to the first control unit and the second control unit respectively, and the third buck-boost unit is used to boost or buck the voltage provided by the first charging interface;

[0036] One end of the fourth buck-boost unit is connected to the second charging interface, and the other end of the fourth buck-boost unit is respectively connected to the first control unit and the second control unit. The fourth buck-boost unit is used to boost or buck the voltage provided by the second charging interface.

[0037] In one embodiment, the power-consuming device includes a wearable device, and the charging source includes a mobile power source, and the mobile power source moves as the wearable device moves.

[0038] The above-mentioned charger is provided with N charging interfaces, a discharging interface and a charging conversion module, wherein N is a positive integer greater than or equal to 2, the N charging interfaces can be connected to N charging sources one by one, and the discharging interface can be connected to the electrical equipment, that is, the charger in this application is an N-input 1-output charger, so that the charging conversion module can switch the charging source among the N charging sources as the power supply for the electrical equipment, and the charging conversion module maintains the power supply to the electrical equipment during the switching of the charging source. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 This is a schematic diagram of the component modules of a charger in one embodiment of the present application;

[0041] Figure 2 This is a schematic diagram of the component modules of a charger in another embodiment of the present application;

[0042] Figure 3 This is a schematic diagram of a charger component module when the charging conversion module in one embodiment of the present application is composed of a first switch unit, a second switch unit and a first control unit;

[0043] Figure 4This is a schematic diagram of a charger component module when the charging conversion module is further provided with a second control unit in an embodiment of the present application;

[0044] Figure 5 This is a schematic diagram of a charger component module when the charging conversion module in one embodiment of the present application is further provided with a first buck-boost unit and a second buck-boost unit;

[0045] Figure 6 This is a schematic diagram of a charger component module when the charging conversion module in an embodiment of the present application is further provided with a third buck-boost unit and a fourth buck-boost unit. DETAILED DESCRIPTION

[0046] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively with reference to the relevant drawings. The embodiments of the utility model are given in the drawings. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0048] It is understood that the terms "first", "second", etc. used in the present invention may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of the present invention, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0049] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0050] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least part of an element” means part or all of an element.

[0051] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0052] The charger provided in this embodiment may have N charging interfaces, where N is a positive integer greater than or equal to 2. Therefore, the charger in this embodiment may have 2 charging interfaces (such as Figure 1 As shown), there may also be 3 charging ports (such as Figure 2 As shown), in this embodiment, the number of charging ports is not limited. For the sake of convenience of explanation, the following description is given by taking the charger having two charging ports as an example.

[0053] Further references Figure 1 The charger includes a first charging interface 101 , a second charging interface 102 , a discharge interface 200 and a charging conversion module 300 .

[0054] Among them, the first charging interface 101 can be connected between the first charging source and the charging conversion module 300, the second charging interface 102 can be connected between the second charging source and the charging conversion module 300, and the discharge interface can be connected between the electrical device and the charging conversion module 300, so that the charging conversion module 300 can convert the power supply voltage of the first charging source or the second charging source into a power supply voltage suitable for the electrical device, and the charging conversion module 300 can switch the first charging source or the second charging source as the actual power supply for the electrical device.

[0055] It should be noted that the first power supply path from the first charging source to the power consumer and the second power supply path from the second charging source to the power consumer in the charging conversion module 300 are connected in parallel. Therefore, when either the first power supply path or the second power supply path is broken, the power supply to the power consumer can still be guaranteed, and when the first power supply path and the second power supply path are in the connection state at the same time, the power supply voltage received by the power consumer will not change. Therefore, in this embodiment, when the charging conversion module 300 switches the first charging source or the second charging source as the actual power supply source for the power consumer, the power consumer will not be powered off, and the power supply voltage obtained by the power consumer can also be kept stable. Therefore, in this embodiment, the charger can ensure that the power consumer will not be powered off when the mobile power supply is replaced.

[0056] As an example, the power-consuming device may be a wearable device, such as an AR device or a VR device, etc. In addition, the charging source may be a mobile power source for the wearable device, and the mobile power source may move along with the movement of the wearable device.

[0057] As an example, the first charging source or the second charging source may be a mobile power source or a fixed power source, and the supply voltages of the first charging source and the second charging source may be the same or different, which is not limited here.

[0058] As an example, the first charging interface 101 and the second charging interface 102 may use the same charging protocol or different charging protocols, which is not limited here.

[0059] In one embodiment, Figure 3 As shown, the charging conversion module 300 includes a first switch unit 301 , a second switch unit 302 and a first control unit 303 .

[0060] Among them, the first switch unit 301 is connected between the first charging interface 101 and the discharging interface 200, the second switch unit 302 is connected between the second charging interface 102 and the discharging interface 200, and the first control unit 303 is connected to the first switch unit 301 and the second switch unit 302 respectively, so that the first control unit 303 can control the first switch unit 301 to open or close, and control the second switch unit 302 to close or open, so as to switch the first charging source or the second charging source as the actual power supply for the electrical equipment.

[0061] In one embodiment, Figure 4 As shown, the charging conversion module 300 further includes a second control unit 304 .

[0062] Among them, the first input end of the second control unit 304 is connected to the first charging interface 101, the second input end of the second control unit 304 is connected to the second charging interface 102, and the output end of the second control unit 304 is connected to the input end of the first control unit 303; the first output end of the first control unit 303 is connected to the first switch unit 301, and the second output end of the first control unit 303 is connected to the second switch unit 302. In this way, the second control unit 304 can detect the remaining power of the first charging source through the first charging interface 101, and detect the remaining power of the second charging source through the second charging interface 102, and generate a power signal according to the remaining power of the first charging source and the remaining power of the second charging source, wherein the power signal can be used to characterize the remaining power of the first charging source and the remaining power of the second charging source, and can also be used to characterize the comparison result of the remaining power of the first charging source and the remaining power of the second charging source. Further, the second control unit 304 will output the power signal to the first control unit 303; and then the first control unit 303 will output the first control signal to the first switch unit 301 and the second control signal to the second switch unit 302 according to the power signal, wherein the first control signal is used to control the first switch unit 301 to remain open or closed, and the second control signal is used to control the first switch unit 302 to remain closed or open.

[0063] It should be noted that the second control unit 304 can obtain the remaining power of the charging source through the charging protocol of the charging interface.

[0064] As an example, when the actual power supply of the electrical device is the first charging source, the first switch unit 301 is in a closed state and the second switch unit 302 is in an open state. If the actual power supply of the electrical device needs to be switched from the first charging source to the second charging source, the first control unit 303 will generate a first control signal and a second control signal respectively, and output the first control signal to the first switch unit 301 respectively, and the first control signal is used to control the first switch unit 301 to be disconnected, and output the second control signal to the second switch unit 302, and the second control signal is used to control the second switch unit 302 to be closed. There is a time difference between the time point when the first control unit 303 outputs the first control signal and the time point when the second control signal is output, specifically, the time point when the second control signal is output is earlier than the time point when the first control signal is output, so that the second switch unit 302 will be closed, and then the first switch unit 301 will be disconnected, so as to avoid the situation where the first switch unit 301 and the second switch unit 302 are disconnected at the same time due to the first switch unit 301 being disconnected first, thereby avoiding the power failure of the electrical device due to switching the power supply of the electrical device.

[0065] As an example, when the actual power supply of the electrical device is the second charging source, the first switch unit 301 is in an open state and the second switch unit 302 is in a closed state. If the actual power supply of the electrical device needs to be switched from the second charging source to the first charging source, the first control unit 303 will generate a first control signal and a second control signal respectively, and output the first control signal to the first switch unit 301 respectively, and the first control signal is used to control the first switch unit 301 to close, and output the second control signal to the second switch unit 302, and the second control signal is used to control the second switch unit 302 to open. There is a time difference between the time point when the first control unit 303 outputs the first control signal and the time point when the second control signal is output, specifically, the time point when the second control signal is output is later than the time point when the first control signal is output, so that the first switch unit 301 will be closed, and then the second switch unit 302 will be opened, so as to avoid the situation where the first switch unit 301 and the second switch unit 302 are disconnected at the same time due to the second switch unit 302 being disconnected first, thereby avoiding the power failure of the electrical device due to switching the power supply of the electrical device.

[0066] As an example, the first control unit 303 and the second control unit 304 may both be charging protocol chips, such as PD (Power delivery) protocol chips.

[0067] In one embodiment, the N charging sources include a first charging source and a second charging source, and the power signal includes a first power signal; when the remaining power of the first charging source is less than a first preset threshold, and the remaining power of the second charging source is greater than a second preset threshold, the second control unit 304 outputs the first power signal to the first control unit 303; the first control unit 303 outputs a first control signal to the first switch unit 301 according to the first power signal to control the first switch unit 301 to remain disconnected, and outputs a second control signal to the second switch unit 302 to control the second switch unit 302 to remain closed. In this way, the actual power supply of the electrical device can be switched from the first charging source to the second charging source.

[0068] It should be noted that the second preset threshold is greater than the first preset threshold.

[0069] In the above embodiment, a first preset threshold value and a second preset threshold value are set to compare with the remaining power of the first charging source and the remaining power of the second charging source. When the remaining power of the first charging source is low and the remaining power of the second charging source is high, the actual power supply of the electrical device is automatically switched from the first charging source to the second charging source, thereby avoiding power outages of the electrical device due to low power supply.

[0070] In one embodiment, the N charging sources include a first charging source and a second charging source, the N switch units include a first switch unit 301 and a second switch unit 302, and the power signal includes a first power signal; when the remaining power of the first charging source is outside a preset discharge interval and the remaining power of the second charging source is within a preset discharge interval, the second control unit 304 outputs the first power signal to the first control unit 303; the first control unit 303 outputs a first control signal to the first switch unit 301 based on the first power signal to control the first switch unit 301 to remain disconnected, and outputs a second control signal to the second switch unit 302 to control the second switch unit 302 to remain closed.

[0071] It should be noted that the power life of the first charging source or the second charging source when discharging within the preset discharge interval is greater than the target life threshold, and the power life of the first charging source or the second charging source when discharging outside the preset discharge interval is less than or equal to the target life threshold, wherein the target life threshold refers to the minimum service life value that the charging source can achieve within the preset charging interval, and the minimum service life value can be obtained through experiments, so it is usually a fixed value.

[0072] As an example, the preset discharge interval refers to a power supply power interval in which the power supply life of the charging source during discharge is greater than a preset life threshold, for example, it may be a power range in which the battery power is from 30% to 80%.

[0073] In the above embodiment, a preset discharge interval is set as a condition for switching the first charging source and the second charging source. In this way, when the remaining power of the first charging source is outside the preset discharge interval and the remaining power of the second charging source is within the preset discharge interval, in order not to affect the service life of the first charging source, the second control unit 304 will promptly output the first power signal to the first control unit 303 to switch the actual power supply of the electrical device from the first charging source to the second charging source, thereby maintaining the power life of the charging source to the greatest extent while ensuring that the electrical device will not be powered off due to low power supply.

[0074] In one embodiment, the switch unit may be a switch component such as a MOS tube or a transistor. Taking N switch units including a first switch unit 301 and a second switch unit 302 as an example, the first switch unit 301 may be a first MOS tube, and the second switch unit 302 may be a second MOS tube.

[0075] The drain of the first MOS tube is connected to the first charging interface 101, the source of the first MOS tube is connected to the discharge interface 200, and the gate of the first MOS tube is connected to the first control unit 303. In this way, when the first control signal output by the first control unit 303 to the first MOS tube is a high-level signal, the first MOS tube is turned on, that is, the first switch unit 301 is closed; when the first control signal output by the first control unit 303 to the first MOS tube is a low-level signal, the first MOS tube is turned off, that is, the first switch unit 301 is disconnected; the drain of the second MOS tube is connected to the first charging interface 101, the source of the second MOS tube is connected to the discharge interface 200, and the gate of the second MOS tube is connected to the first control unit 303. In this way, when the second control signal output by the first control unit 303 to the first MOS tube is a high-level signal, the second MOS tube is turned on, that is, the second switch unit 302 is closed; when the second control signal output by the first control unit 303 to the second MOS tube is a low-level signal, the second MOS tube is turned off, that is, the second switch unit 302 is disconnected.

[0076] It should be noted that the first MOS tube and the second MOS tube are N-type MOS tubes, and the first MOS tube and the second MOS tube may also be P-type MOS tubes, wherein the circuit connection method and the control method of conduction or closing of the P-type MOS tube and the N-type MOS tube are similar and will not be repeated here.

[0077] In one embodiment, Figure 5 As shown, the charging conversion module 300 further includes a first buck-boost unit 305 and a second buck-boost unit 306 .

[0078] Among them, the first buck-boost unit 305 and the first switch unit 301 are connected in series between the first charging interface 101 and the discharge interface 200, and the first buck-boost unit 305 is used to boost or buck the supply voltage of the first charging source, so that the boosted or bucked supply voltage matches the actual required voltage of the electrical equipment; the second buck-boost unit 306 and the second switch unit 302 are connected in series between the second charging interface 101 and the discharge interface 200, and the second buck-boost unit 305 is used to boost or buck the supply voltage of the second charging source, so that the boosted or bucked supply voltage matches the actual required voltage of the electrical equipment.

[0079] In one embodiment, Figure 6 As shown, the charging conversion module 300 further includes a third buck-boost unit 307 and a fourth buck-boost unit 308 .

[0080] Among them, one end of the third buck-boost unit 307 is connected to the first charging interface 101, and the other end of the third buck-boost unit 307 is respectively connected to the first control unit 303 and the second control unit 304, and the third buck-boost unit 307 is used to boost or reduce the supply voltage of the first charging source and the second charging source, so that the boosted or reduced supply voltage matches the actual required voltage of the first control unit 303, and matches the actual required voltage of the second control unit 304.

[0081] One end of the fourth buck-boost unit 308 is connected to the second charging interface 101, and the other end of the fourth buck-boost unit 308 is respectively connected to the first control unit 303 and the second control unit 304. The fourth buck-boost unit 308 is used to boost or reduce the supply voltage of the first charging source and the second charging source, so that the boosted or reduced supply voltage matches the actual required voltage of the first control unit 303, and matches the actual required voltage of the second control unit 304.

[0082] In one embodiment, when the number of N charging sources is greater than 2, the N charging sources are taken as an example to include a first charging source, a second charging source and a third charging source. Accordingly, the N switch units may also include a first switch unit 301, a second switch unit 302 and a third switch unit, and the N charging interfaces may include a first charging interface 101, a second charging interface 102 and a third charging interface 103.

[0083] Further, the power signal may include a second power signal; when the remaining power of the first charging source is less than the first preset threshold, the remaining power of the second charging source is greater than the remaining power of the third charging source, and the remaining power of the second charging source is greater than the second preset threshold, the second control unit 304 outputs the second power signal to the first control unit 303; the first control unit 303 outputs the first control signal to the first switch unit 301 according to the second power signal to control the first switch unit 301 to remain disconnected, outputs the second control signal to the second switch unit 302 to control the second switch unit 302 to remain closed, and outputs the third control signal to the third switch unit to control the third switch unit to remain disconnected. In this way, when the remaining power of the first charging source is low, the second charging source with higher power can be automatically determined between the second charging source and the third charging source, and the actual power supply of the electric device is switched from the first charging source to the second charging source with higher power, so as to avoid the power failure of the electric device due to the low power supply, and ensure a longer battery life of the electric device.

[0084] Further, when the remaining power of the first charging source is outside the preset discharge interval, the remaining power of the second charging source is greater than the remaining power of the third charging source, and the remaining power of the second charging source is within the preset discharge interval, the second control unit 304 outputs a second power signal to the first control unit 303; the first control unit 303 outputs a first control signal to the first switch unit 301 according to the second power signal to control the first switch unit 301 to remain disconnected, outputs a second control signal to the second switch unit 302 to control the second switch unit 302 to remain closed, and outputs a third control signal to the third switch unit to control the third switch unit to remain disconnected. In this way, when the remaining power of the first charging source is outside the preset discharge interval, in order not to affect the service life of the first charging source, the second charging source with higher power will be automatically determined between the second charging source and the third charging source, and the actual power supply of the electric device will be switched from the first charging source to the second charging source with higher power, so that the power life of the charging source can be maintained to the greatest extent, while ensuring that the electric device will not be powered off due to too low power supply, and ensuring that the battery life of the electric device is longer.

[0085] In one embodiment, the N charging sources include a charging source currently in use by the power-consuming device and N-1 unused charging sources, and the power signal includes a third power signal and a fourth power signal, wherein the unused charging source refers to a charging source that is not currently in use by the power-consuming device.

[0086] When the remaining power of the charging source currently in use is less than the first preset threshold value, and there is a target charging source whose remaining power is within the preset discharge interval among the N-1 unused charging sources, the second control unit 304 outputs the third power signal to the first control unit 303; the first control unit 303 outputs a first control signal to the switch units corresponding to all charging sources except the target charging source with the highest power according to the third power signal, so as to control the switch units corresponding to all charging sources except the target charging source with the highest power to remain disconnected, and the first control unit 303 outputs a second control signal to the switch unit corresponding to the target charging source with the highest power according to the third power signal, so as to control the switch unit corresponding to the target charging source with the highest power to remain closed.

[0087] When the remaining power of the charging source currently in use is less than the first preset threshold value, and there is no target charging source whose remaining power is within the preset discharge interval among the N-1 unused charging sources, the second control unit 304 outputs a fourth power signal to the first control unit 303; the first control unit 303 outputs a first control signal to the switch units corresponding to all charging sources except the unused charging source with the highest power, based on the fourth power signal, so as to control the switch units corresponding to all charging sources except the unused charging source with the highest power to remain disconnected; and the first control unit 303 outputs a second control signal to the switch unit corresponding to the unused charging source with the highest power, based on the fourth power signal, so as to control the switch unit corresponding to the unused charging source with the highest power to remain closed.

[0088] In this way, it can be achieved that when the remaining power of the charging source currently used by the electric device is low, if there is a target charging source with a remaining power within the preset discharge interval among the N-1 unused charging sources, the charging source with the highest power among the target charging sources within the preset discharge interval is selected as the backup charging source for switching to the currently used charging source, which can avoid power outages of the electric device due to too low power of the power supply source and can ensure to the greatest extent that the service life of the charging source and the battery life of the electric device are longer; if there is no target charging source with a remaining power within the preset discharge interval among the N-1 unused charging sources, the charging source with the highest power is directly selected as the backup charging source for switching to the currently used charging source, which can avoid power outages of the electric device due to too low power of the power supply source and can ensure to the greatest extent that the battery life of the electric device is longer.

[0089] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0090] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the attached claims.

Claims

1. A charger, characterized in that: The charger includes N charging interfaces, a discharging interface and a charging conversion module, wherein N is a positive integer greater than or equal to 2; The N charging interfaces can be connected to the N charging sources in a one-to-one correspondence, and the discharging interface is connected to the electrical equipment; The charging conversion module is used to switch a charging source among the N charging sources as the power supply source for the power-consuming device, wherein the charging conversion module maintains power supply to the power-consuming device during the process of switching the charging source.

2. The charger according to claim 1, characterized in that: The charging conversion module includes N switch units and a first control unit; One end of the N switch units is connected to the N charging interfaces in a one-to-one correspondence, and the other end of the N switch units is connected to the discharging interface; The first control unit is connected to the N switch units respectively, and the first control unit is used to control the N switch units to remain open or closed.

3. The charger according to claim 2, characterized in that: The charging conversion module also includes a second control unit; The second control unit is respectively connected to the N charging interfaces and the first control unit; The second control unit outputs a power signal to the first control unit according to the remaining power of the N charging sources; The first control unit controls the N switch units to remain open or closed according to the power signal.

4. The charger according to claim 3, characterized in that: The N charging sources include a first charging source and a second charging source, the N switch units include a first switch unit and a second switch unit, and the power signal includes a first power signal; When the remaining power of the first charging source is less than a first preset threshold and the remaining power of the second charging source is greater than a second preset threshold, the second control unit outputs the first power signal to the first control unit; The first control unit controls the first switch unit to remain open and controls the second switch unit to remain closed according to the first power signal.

5. The charger according to claim 3, characterized in that: The N charging sources include a first charging source and a second charging source, the N switch units include a first switch unit and a second switch unit, and the power signal includes a first power signal; When the remaining power of the first charging source is outside the preset discharge interval and the remaining power of the second charging source is within the preset discharge interval, the second control unit outputs the first power signal to the first control unit; The first control unit controls the first switch unit to remain open and controls the second switch unit to remain closed according to the first power signal.

6. The charger according to claim 3, characterized in that: The N charging sources include a first charging source, a second charging source and a third charging source, the N switch units include a first switch unit, a second switch unit and a third switch unit, and the power signal includes a second power signal; When the remaining power of the first charging source is outside the preset discharge interval, the remaining power of the second charging source is greater than the remaining power of the third charging source, and the remaining power of the second charging source is within the preset discharge interval, the second control unit outputs the second power signal to the first control unit; The first control unit controls the first switch unit to remain open, controls the second switch unit to remain closed, and controls the third switch unit to remain open according to the second power signal.

7. The charger according to claim 3, characterized in that: The N charging sources include a currently used charging source of the power-consuming device and N-1 unused charging sources, and the power signal includes a third power signal and a fourth power signal; When the remaining power of the currently used charging source is less than a first preset threshold value, and there is a target charging source whose remaining power is within a preset discharge interval among the N-1 unused charging sources, the second control unit outputs the third power signal to the first control unit; The first control unit controls the switch unit corresponding to the target charging source with the highest power to remain closed, and controls the switch units corresponding to all charging sources except the target charging source with the highest power to remain open, according to the third power signal; When the remaining power of the currently used charging source is less than the first preset threshold value, and there is no target charging source whose remaining power is within the preset discharge interval among the N-1 unused charging sources, the second control unit outputs the fourth power signal to the first control unit; The first control unit controls the switch unit corresponding to the unused charging source with the highest power to remain closed, and controls the switch units corresponding to all charging sources except the unused charging source with the highest power to remain open, according to the fourth power signal.

8. The charger according to claim 2, characterized in that: The switch unit includes a MOS tube; The drain of the MOS tube is connected to the charging interface corresponding to the MOS tube, the source of the MOS tube is connected to the discharging interface, and the gate of the MOS tube is connected to the first control unit.

9. The charger according to claim 3, characterized in that: The N charging interfaces include a first charging interface and a second charging interface, the N switch units include a first switch unit and a second switch unit, and the charging conversion module also includes a first buck-boost unit and a second buck-boost unit; The first buck-boost unit and the first switch unit are connected in series between the first charging interface and the discharging interface, and the first buck-boost unit is used to boost or buck the voltage provided by the first charging interface; The second buck-boost unit and the second switch unit are connected in series between the second charging interface and the discharging interface, and the second buck-boost unit is used to boost or buck the voltage provided by the second charging interface.

10. The charger according to claim 3, characterized in that: The N charging interfaces include a first charging interface and a second charging interface, and the charging conversion module also includes a third buck-boost unit and a fourth buck-boost unit; One end of the third buck-boost unit is connected to the first charging interface, and the other end of the third buck-boost unit is connected to the first control unit and the second control unit respectively, and the third buck-boost unit is used to boost or buck the voltage provided by the first charging interface; One end of the fourth buck-boost unit is connected to the second charging interface, and the other end of the fourth buck-boost unit is respectively connected to the first control unit and the second control unit. The fourth buck-boost unit is used to boost or buck the voltage provided by the second charging interface.

11. The charger according to claim 1, characterized in that: The power-consuming device includes a wearable device, and the charging source includes a mobile power source, which moves as the wearable device moves.

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