CN113964926A

CN113964926A - Multi-power management method and terminal

Info

Publication number: CN113964926A
Application number: CN202111237684.3A
Authority: CN
Inventors: 郭延锐; 吴港; 郭佳; 孙德林
Original assignee: Shenzhen Zhongyun Innovation Technology Co ltd
Current assignee: Shenzhen Zhongyun Innovation Technology Co ltd
Priority date: 2021-04-15
Filing date: 2021-10-22
Publication date: 2022-01-21
Also published as: CN116017339A; CN115497255A; CN115314853A; CN115046578A; CN115497255B; CN114866973A; CN115665687A; CN116437307A; CN115052255A

Abstract

The invention relates to a multi-power management method and a terminal, wherein the terminal at least comprises a solar charging circuit, a charging chip control circuit, a VDC access detection circuit and a power selection circuit, the power selection circuit is connected to the charging chip control circuit through the VDC access detection circuit, the charging chip control circuit is connected with the solar charging circuit, and the VDC access detection circuit is configured to monitor the power access condition of the power selection circuit and transmit the monitored condition to the charging chip control circuit in the form of an electric signal; the charging chip control circuit is configured to control the solar charging circuit to be turned on/off after receiving the electric signal transmitted by the VDC access detection circuit. The terminal can integrate all modules together by designing the PCB structure, thereby reducing the volume of equipment, improving the protection capability of the equipment, reducing the construction difficulty and saving the construction time.

Description

Multi-power management method and terminal

Technical Field

The invention belongs to the technical field of power supply (the technical field is not written in the way usually, the specific description can be put in the following), and particularly relates to a multi-power management method and a terminal, in particular to a multi-power management method and a terminal using solar energy and at least one other power supply, such as an edge computing terminal deployed outdoors, an internet of things device, public basic setting needing data transmission and the like.

Background

With the development of scientific technology, more and more equipment facilities can be deployed outdoors, such as internet of things terminals, solar street lamps, monitoring machines, vending machines or other equipment with at least two power supply paths (one of which is a solar power supply) integrated for supplying power. The usage scenarios of these facilities are increasing, and the power supply methods of the facilities are different in different scenarios.

Taking the internet of things terminal as an example, the internet of things terminal cannot be connected with an external power supply in a field environment. In order to enable the internet terminal to work normally under different environments, multiple power supply modes are arranged on the terminal. Due to the adoption of multiple power supply modes, the terminal necessarily relates to the management of multiple power supply paths.

Chinese patent publication No. CN112653225A discloses an intelligent power management system for photovoltaic power supply, which includes: the charging and discharging system of the battery power supply comprises solar charging and discharging, commercial power charging and discharging and storage battery charging and discharging; the power supply circuit protection system comprises a load intelligent adjusting circuit, an overvoltage and overcurrent protection circuit and a power failure fault alarm circuit; a rectifier bridge is introduced between a charging and discharging system of the battery power supply and a power supply circuit protection system; the electric equipment protection system comprises a delay circuit, an automatic closing switching circuit and an explosion-proof circuit. The charging and discharging system of the battery power supply comprises a solar panel charging and discharging circuit, a mains supply charging circuit and an over-charging over-current protection circuit, wherein the solar panel charging and discharging circuit is connected with the mains supply charging circuit and is used for charging a storage battery together; the solar panel charge and discharge circuit is connected with the storage battery charge and discharge circuit and can supply power to the electric equipment at the same time. The diodes are additionally arranged in the output circuits of the solar panel charging and discharging circuit and the storage battery charging and discharging circuit, so that high-voltage preferential power supply is realized in the solar panel and the storage battery, and the efficiency is improved. The overcharge and overcurrent protection circuit detects a voltage signal of the storage battery by using the sensor, and monitors the charging process of the solar energy to the storage battery by using the sensor, so that the overcharge and overcurrent protection circuit of the storage battery is realized. If the storage battery is not fully charged, the sensor detects a weak voltage signal to enable the solar power generation panel to charge the storage battery; if the storage battery is fully charged, the sensor detects a high-voltage signal and stops charging the storage battery. The battery is not under-voltage or over-charged, so that the battery can work within the rated power for a long time, and the service life of the storage battery is effectively prolonged. The charging and discharging system and the battery charging and discharging system are combined, so that the solar battery pack, the solar panel and the mains supply are cooperatively powered, and a stable power supply is provided for the power supply system.

Patent publication No. CN112345029A discloses a ponding depth monitoring warning pole. The device is deployed in an outdoor environment and is provided with a plurality of power supply complementation modes including a storage battery mode, a photoelectric mode and a hydroelectric generation mode. Utilize the battery to supply power when the battery has the electricity, utilize from taking the battery to supply power when the battery does not have the electricity, get into miniature hydraulic generator through the hole of permeating water of warning pole body of rod bottom when rivers for miniature hydraulic generator generates electricity, supply with the battery through comprehensive controller afterwards, under the condition that takes place continuous rainfall, when shimmer solar panel can't generate electricity, can utilize miniature hydraulic generator to generate electricity, guarantee all-weather power supply.

For example, chinese patent publication No. CN112886660A discloses a solar LED lamp control method and circuit with supplementary power supplied by mains, which has a threshold Wh of remaining battery power, when the remaining battery power is less than Wh, if in the daytime, the mains power supply circuit and the solar power supply circuit charge the battery together, if at night, the mains power supply circuit and the battery supply power together, when the remaining battery power is greater than or equal to Wh, if in the daytime, the mains power supply circuit stops working, when the battery is not fully charged, the solar power supply circuit charges the battery alone, if at night, the mains power supply circuit stops working, and the battery supplies power alone.

Patent document CN202231480U discloses a multi-power supply device for a wireless internet of things terminal, which is provided with multiple power interfaces and corresponding charging circuits. The power supply comprises an alternating current power supply, a solar power supply and other power supplies. The device determines that a certain power supply supplies power to the whole device through controlling the switch circuit. The control switch circuit is a plurality of diodes with the same number as the power supply circuits, the output end of each power supply circuit is provided with one diode, the anode of each diode corresponds to the output end of each power supply circuit, and the cathode of each diode is connected with the power output port. The input energy voltages of all power supply branches are different, so that the anode voltages of all diodes are different, and the diodes are only switched on and switched off by the characteristics of the diodes, namely, one power supply branch is connected under different power supply modes. When the switched-on power supply branch has no input, the diode on the other branch is switched on, and the rest branches are all switched off, so that the power supply of the other power supply form is carried out. Although the setting mode of the control switch circuit is simple, the diode has larger conduction voltage drop, and when the output current is larger, the diode generates larger loss and efficiency loss. The premise that the control switch circuit works normally is that the input energy voltages of all power supply branches are different, and under the condition that the input energy voltages of the power supply branches are the same, the control switch circuit of the device is possibly abnormal, so that a plurality of power supplies supply power simultaneously, and the voltage is overlarge and even equipment is burnt.

Patent publication No. CN207184140U discloses a standby power supply system for terminal equipment of the Internet of things. The system can accurately detect when the mains supply for supplying power to the equipment fluctuates or is powered off, and directly switches to the standby power supply for supplying power when the mains supply is powered off.

Patent publication No. CN211018382U discloses a switching device for multiple power supplies of a mobile terminal. The communication module 12 may only receive one power supply mode at a time, where the power supply mode includes the power supply of the USB interface 4, the power supply of the adapter interface 1, or the power supply of the battery 6. The battery can be prevented from continuously working by flexibly switching various power supply modes, and the service life of the battery is prolonged. In addition, through a plurality of voltage and current detection modules, the power supply process can be detected in time, and the safety of the mobile terminal in the using process is effectively improved.

In summary, in the prior art, most of the schemes for managing multiple Power supplies (especially, multiple Power supplies with solar Power supplies) designed for implementing the UPS (Uninterruptible Power Supply) function are provided with rechargeable batteries, and various Power supplies are used to charge the rechargeable batteries. However, in the prior art, a phenomenon that current flows to other charging circuits when a certain power supply charges a rechargeable battery (for example, commercial power of a multi-power supply system flows to a solar charging circuit when the rechargeable battery is charged) generally exists, and the phenomenon is called backward flow. In order to avoid or reduce the occurrence of the reverse flow phenomenon, a reverse protection circuit (i.e. a reverse flow prevention circuit) needs to be designed to reduce the power consumption waste caused by the reverse flow, but in the prior art, a MOS transistor is usually adopted to perform reverse flow prevention, so that the reverse protection voltage difference is generated, and thus, the battery cannot be fully charged. Therefore, there is a need for a compromise solution for preventing backflow and eliminating or reducing the problem of battery non-full charge caused by the reverse protection voltage difference generated by backflow prevention in the multi-power management of rechargeable batteries.

Furthermore, on the one hand, due to the differences in understanding to the person skilled in the art; on the other hand, since the inventor has studied a lot of documents and patents when making the present invention, but the space is not limited to the details and contents listed in the above, however, the present invention is by no means free of the features of the prior art, but the present invention has been provided with all the features of the prior art, and the applicant reserves the right to increase the related prior art in the background.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a multi-power management terminal, which at least comprises: the solar charging device comprises a processing module, a solar charging circuit, a charging chip control circuit, a VDC access detection circuit and a power selection circuit. The power selection circuit is connected to the charging chip control circuit through the VDC access detection circuit. The charging chip control circuit is connected with the solar charging circuit. The VDC access detection circuit is configured to monitor a power access condition of the power selection circuit and transmit the monitored condition in the form of an electrical signal to the charging chip control circuit. And the charging chip control circuit controls the solar charging circuit to be turned on/off after receiving the electric signal transmitted by the VDC access detection circuit. The power path management scheme of the multi-power management terminal provided by the invention can be designed around one or more combinations of external commercial power supply, external adapter power supply, solar power supply and battery power supply. Considering that a plurality of power supply modes are combined together, although the arrangement and installation are convenient, if external module integration is completely used according to the prior art, the size is large, a plurality of lines need to be accessed during field installation, a constructor is easy to connect in mistake during field construction, and the time spent is long. Therefore, the multi-power management terminal provided by the invention is highly integrated.

According to a preferred embodiment, the solar input end is directly connected to an external solar panel, and the solar panel inputs electric energy converted from light energy to the solar charging circuit through the solar input end. Under the condition that the solar panel is connected with the solar input end, the electric energy generated by the solar panel and converted from the light energy can be output in a maximum power point tracking mode through the solar charging circuit.

According to a preferred embodiment, the solar charging circuit comprises at least a solar input, a charging chip and a built-in battery interface. The solar energy input end is connected with the built-in battery interface through the charging chip. The charging chip controls the electric energy input from the solar energy input end to enter the built-in battery interface. Preferably, the electric energy generated by conversion of the solar panel and input from the solar input end can also supply power to the whole terminal system when the battery is charged through the built-in battery interface.

According to a preferred embodiment, the VDC access detection circuit comprises at least a VDC input, a system supply terminal and a second semiconductor switch. The VDC input end is configured to be connected with an external power supply to supply power to the system power supply end. The VDC input terminal transmits an electrical signal to the DC input signal terminal through the second semiconductor switch. Preferably, when the external commercial power is converted into a VDC input terminal of a direct current access system directly used by the terminal through an alternating current to direct current (AC to DC) module integrated inside the terminal and the commercial power is converted into the VDC input terminal of the direct current access system directly used by the terminal through an external adapter, the current entering the system through the VDC input terminal can charge the battery and simultaneously can supply power to the whole system through a system power supply terminal.

According to a preferred embodiment, the solar charging chip control circuit comprises at least a charging chip first terminal, a first semiconductor switch and a DC input signal terminal. The DC input signal end transmits the situation of monitoring the power supply access condition of the power supply selection circuit to the first end of the charging chip through the first semiconductor switch in the form of an electric signal. The charging chip receives an electrical signal through the first end of the charging chip. Preferably, when the charging chip receives an electrical signal carrying "external VDC access information" through the first terminal of the charging chip, the charging chip may cut off the solar charging circuit, so that the terminal system no longer uses solar energy, i.e. solar energy neither charges the battery nor supplies power to the terminal system, and at this time, the power supply of the whole terminal system is directly or indirectly provided by the external VDC.

According to a preferred embodiment, the power selection circuit comprises at least the VDC input, a third semiconductor switch, a fourth semiconductor switch, the system power supply and the built-in battery interface. The third semiconductor switch is configured to be in a conductive state in the absence of external power access to the VDC input. The built-in battery interface supplies power to the system power supply terminal through the third semiconductor switch, and in the case that an external power is connected to the VDC input terminal, the third semiconductor switch is turned off and the fourth semiconductor switch is turned on, so that the system power supply terminal obtains power from the VDC input terminal. Preferably, the system power supply terminal receives the current flowing from the built-in battery interface through the third semiconductor switch to supply power to the terminal system in the case that no external power is applied to the VDC input terminal. Preferably, the current flowing from the interface of the built-in battery to the power supply terminal of the system through the third semiconductor switch can be generated by the solar panel through converting light energy, and can also be generated by discharging the battery.

According to a preferred embodiment, a built-in battery is connected to the built-in battery interface, wherein the built-in battery interface charges the built-in battery and supplies power to the system power supply terminal. Preferably, the internal battery interface may be bi-directionally conductive. When the built-in battery is charged, a current flows from the built-in battery interface to the built-in battery to charge the battery. Preferably, the charging current may be electric energy generated by converting light energy from a solar panel, may also be current converted by an AC-to-DC module after an external commercial power is connected to the terminal, and may also be direct current converted from an external alternating commercial power through an adapter.

According to a preferred embodiment, the external power input at the VDC input comprises direct current DC power provided by an adapter. The system also comprises a direct current DC power supply which is converted from AC commercial power to DC by an AC-DC module. Preferably, after the external power supply inputs the whole circuit of the multi-power management terminal at the VDC input terminal, the external power supply charges the built-in battery of the terminal instead of solar energy in case that the terminal is solar-charged by the connected solar panel.

According to a preferred embodiment, the terminal further comprises a second charging chip control circuit. The second charging chip control circuit at least comprises a DC input signal end, a first semiconductor switch, a second semiconductor switch, a resistor and a second end of the charging chip. The DC input signal end transmits the monitored power supply access condition of the power supply selection circuit to the second end of the charging chip in the form of an electric signal through a circuit consisting of the first semiconductor switch, the second semiconductor switch and the resistor. The charging chip controls the solar charging circuit to be turned on/off through a signal received by the second end of the charging chip. Preferably, the first semiconductor switch and the second semiconductor switch are in a closed state when the multi-power management terminal is not connected to an external power supply and is only connected to a solar panel. When an external power supply is connected to the circuit of the multi-power-supply management terminal, the level of the second end of the charging chip is pulled down to the ground through the DC input signal end, so that the solar charging circuit is closed, and the connection between the solar energy and the circuit of the multi-power-supply management terminal is cut off.

The invention also provides a multi-power management method. The method comprises the following steps: the power supply selection circuit is connected to the charging chip control circuit through the VDC access detection circuit; the charging chip control circuit is connected with the solar charging circuit; the VDC access detection circuit monitors the power supply access condition of the power supply selection circuit and transmits the monitored condition to the charging chip control circuit in the form of an electric signal; and the charging chip control circuit controls the solar charging circuit to be turned on/off after receiving the electric signal transmitted by the VDC access detection circuit.

Drawings

Fig. 1 is a schematic diagram of a solar charging circuit of a preferred embodiment of the terminal of the present invention;

FIG. 2 is a preferred circuit diagram of the solar charging chip control circuit of the present invention;

fig. 3 is a preferred circuit schematic of the VDC access detection circuit of the present invention;

FIG. 4 is a schematic diagram of a preferred power selection circuit of the present invention;

FIG. 5 is another preferred circuit diagram of the solar charging chip control circuit of the present invention;

FIG. 6 is a solar charging self-recovery circuit in accordance with a preferred embodiment of the present invention;

FIG. 7 is a block diagram of a preferred embodiment of a processing module of the present invention;

FIG. 8 is a flow chart of the steps of a preferred embodiment of the method of the present invention.

List of reference numerals

100: a processing module; 200: a solar charging circuit; 210: a solar energy input end; 220: a charging chip; 230: a built-in battery interface; 221: a charging chip first end; 222: a charging chip second terminal; 240: a DC input signal terminal; 250: a microcontroller; 300: a charging chip control circuit; 320: a resistance; 400: VDC access detection circuit; 410: a system power supply terminal; 420: a VDC input; 430: a first semiconductor switch; 431: a second semiconductor switch; 432: a third semiconductor switch; 433: a fourth semiconductor switch; 434: a fifth semiconductor switch; 500: a power supply selection circuit; 600: a second chip control circuit; 700: and (4) a flow chart.

Detailed Description

The following detailed description is made with reference to fig. 1 to 8.

The outdoor equipment can be terminal equipment for transmitting data, equipment for sending/receiving signals, or a terminal which needs to be connected with other equipment through a network and a cable, such as an internet of things terminal, a solar street lamp, a vending machine or other equipment facilities with at least two power supply paths. The usage scenarios of these facilities are increasing, and the power supply methods of the facilities are different in different scenarios.

Taking the terminal of the internet of things as an example, with the high-speed development of the internet of things, the use scenes of the terminal of the internet of things are continuously increased, and the power supply modes of the terminal are different under different scenes. At present, the design of setting multiple power supply modes on the same electric equipment is very common. And the key technology of using multiple power supply modes to stably supply power for the electric equipment lies in multi-power supply path management. At present, a method for managing multiple power supply paths is mature, a plurality of special chips are provided, for example, in the aspect of consumer electronics and power supply path management of a mobile phone, when an external charger is not inserted, power supply of the whole system is provided by an internal battery, after the charger is inserted, the battery is not discharged, the charger charges the battery, and meanwhile, the charger supplies power to the system. The solar panel is connected to the system to charge the equipment, so the scheme is common, a large solar charging panel is generally installed in some environments with sufficient space, a large charging battery is used, the problem of large static power consumption is not needed to be considered, and the charging battery can be used for a long time.

The power supply mode adopted by the terminal comprises at least one power supply mode of external commercial power supply, external adapter power supply, battery power supply, wind power supply, hydraulic power supply, electromagnetic energy power supply, temperature difference power supply, kinetic energy power supply, biological energy power supply and the like besides solar power supply. Preferably, the power path management scheme of the present invention may be designed around one or a combination of external mains supply, external adapter supply, solar supply and battery supply.

Preferably, the present invention can be used in a terminal device for transmitting data, or a device for transmitting/receiving signals, or a terminal that needs to be connected to other devices through a network or a cable, so that the terminal does not affect the deployment due to power supply problems. The deployment and use scenes of the terminal are many, and the terminal is divided into a power scene and a power-free scene according to whether a power scene can be provided or not, if the equipment only has one power supply mode, the terminal is difficult to deploy on many sites, a plurality of modules need to be externally connected, so that the construction cost is increased, the later maintenance cost is also increased, and the terminal is inconvenient to deploy on the sites on a large scale.

Preferably, an alternating current to direct current (AC to DC) module is integrated in the terminal to convert alternating current such as mains Power into direct current for the terminal to directly use, a battery is further integrated in the terminal to realize an Uninterruptible Power Supply (UPS) function, and the UPS function is to connect a storage battery (mostly a lead-acid maintenance-free storage battery) with the host machine to provide stable and uninterrupted Power Supply for Power electronic equipment of the host machine. The terminal can insert solar panel and charge for the battery, also can supply power through the adapter. The AC-to-DC module at least comprises a transformer and an AC-to-DC conversion chip (AD conversion chip).

Under the condition that a terminal needs to be connected with a solar panel, a current general method is to connect the solar panel into a solar charging module which supports a Maximum Power Point Tracking (MPPT) function. However, when the solar energy charging module is only connected with the solar panel and the rechargeable battery, the quiescent current is larger and reaches the mA level, in a field occasion, continuous rainy days can occur, the standby power consumption of the 12V rechargeable battery can reach more than 20mAh every day, and the electric energy close to 150mAh is consumed in vain in rainy days lasting for one week.

Under the condition of using the solar panel for power supply, external power supply is connected, and the external power supply can flow current backwards to the solar charging module. If the external power supply is repeatedly plugged and unplugged or the power supply is unstable, the solar charging module is repeatedly and repeatedly reflowed, the solar charging circuit is repeatedly switched on and off, devices in the circuit are lost, the solar module is damaged, and finally the solar power supply fails. On the other hand, the solar module can consume a certain amount of energy when flowing backwards. The scheme of the power path pipe can avoid the current backflow of the solar module.

The invention takes the access state of the external power supply as a trigger signal, under the condition that the external power supply is accessed to the terminal, the VDC access detection circuit of the invention detects the access of the external power supply and transmits the detected signal to the solar charging chip control circuit, and the solar charging chip control circuit enables the solar charging circuit to enter the dormant state. The solar charging function of the invention is forced to be switched off whether the solar panel generates electric energy or not. After the solar charging function is turned off, the problem that the solar module is subjected to reverse current flow is solved under the condition that an external power supply is connected, the abnormity caused by the fact that the solar panel continuously charges the battery is avoided, in addition, the static current of the solar module can be reduced to 30 mu A through the arrangement mode, and the problems that the static current is large and much power consumption is wasted are successfully solved.

Example 1

The embodiment discloses a multi-power management terminal. The terminal of the embodiment can be an edge computing terminal, a data acquisition terminal, a router, a signal transmitting terminal, a data acquisition wireless relay and a sensor.

The power supply mode which can be adopted by the terminal comprises one or a combination of more of external commercial power supply, external adapter power supply, solar power supply, battery power supply, wind power supply, hydraulic power supply, electromagnetic energy power supply, temperature difference power supply, kinetic energy power supply and biological energy power supply.

The deployment and use scenes of the data acquisition terminal are divided into power supply scenes and power supply-free scenes according to whether the power supply scenes can be provided or not. Under the power supply scene, the two situations of sufficient space and insufficient space are divided. And the space for deployment in site construction is insufficient, and only an external alternating current power supply can be directly provided for equipment. In the case of direct use of an external AC power source, an AC to DC module is integrated within the device. The AC-to-DC module converts an external alternating current power supply into a direct current power supply usable by the equipment. Under the condition that a sufficient space is provided for installing the stabilized voltage power supply, the adapter power supply can be provided for the equipment. Under the scene, the device can integrate a battery to realize the UPS function. In a scene without a power supply, a built-in battery is arranged inside the device. Preferably, the solar panel can also be accessed to charge the battery in case of sufficient sunlight. Under the condition that the solar panel cannot be deployed due to the fact that sunlight is shielded, the solar panel can be charged after the built-in battery finishes electric energy consumption. If the device has only one power supply mode, the device is difficult to deploy in many fields. A plurality of modules need to be connected externally, so that the construction cost is increased, the later maintenance cost is also increased, and the large-scale on-site deployment is inconvenient.

In the above-described powerless scenario, the solar panel is generally accessible in sunny places. Currently, a common method is to insert a solar panel into a solar charging module that supports a Maximum Power Point Tracking (MPPT) function. Such solar modules are directed to high power solar panels. When the solar charging module is only connected with the solar panel and the rechargeable battery, the quiescent current is relatively high, and the mA level can be achieved. The standby power consumption of each chip, device, and the like in the solar circuit is large. In a field situation, a rainy weather may occur for many consecutive days. In rainy weather, the solar panel cannot work. The standby power consumption of the 12V rechargeable battery in the device reaches more than 20mAh every day. A rainy day lasting one week will consume nearly 150mAh of electrical energy. The existing solar charging modules are all independent structures. In actual deployment, one end of the solar charging module is connected with the solar panel, and the other end of the solar charging module is connected with the terminal device. The solar charging module is exposed after being installed. This condition makes the solar charging module highly vulnerable to damage. Particularly, in the case where the solar charging module is deployed in the field, the solar charging module is easily damaged by rainwater, dust and other environmental factors.

Under the condition of using the solar panel for power supply, external power supply is connected, and the external power supply can flow current backwards to the solar charging module. When the external power supply is unstable (for example, the external commercial power or the adapter is in poor contact with the terminal), the solar charging module is repeatedly and repeatedly recharged, the solar charging circuit is repeatedly switched on and off, devices in the circuit are lost, the solar module is damaged, and finally the solar power supply fails. On the other hand, the reverse flow to the solar module consumes some energy.

In summary, the difficulties to be overcome by the present invention in providing a multi-power management terminal include:

1. in consideration of combining multiple power supply modes, although the power supply device is convenient to deploy and install, the power supply device is large in size due to the fact that external module integration is completely used according to the prior art, multiple lines need to be connected during field installation, constructors can easily get in mistake, and meanwhile time spent is long;

2. there is a need to optimize the rechargeable battery for use with the system. Otherwise, the battery can reversely flow current to the solar charging module when no sunlight exists, so that the quiescent current is large, and much power consumption is wasted;

3. the solar module is combined with other modules for use, and the dynamic enabling function cannot be realized. The external power supply may cause the solar charging module to be repeatedly and repeatedly recharged due to unstable connection, so that the solar charging circuit is repeatedly switched on and off, devices in the circuit are lost, the solar module is damaged, and finally the solar power supply fails;

4. the external solar charging module has large volume, and is extremely easy to be damaged by rainwater, sand and dust and other environmental factors during actual deployment, particularly in the field deployment;

5. the parameters of the general solar module are different from the matching degree of the actual use requirements, and the situations of overlarge dissipation, current overload and other damage to equipment can occur.

In view of the above disadvantages, the present invention provides a multi-power management terminal. The power supply modes adopted by the terminal comprise at least two power supply modes of external commercial power supply, external adapter power supply, solar power supply, battery power supply, wind power supply, hydraulic power supply, electromagnetic energy power supply, temperature difference power supply, kinetic energy power supply and biological energy power supply. Preferably, the power path management scheme of the present invention is designed around four power supply modes, namely, external mains power supply, external adapter power supply, solar power supply and battery power supply, and the external mains power supply, the external adapter and the solar power supply can charge the built-in battery of the terminal. The invention uses the access state of the external power supply as the information carrier to manage the power supply. Under the condition that the terminal is not accessed with an external power supply and a solar panel, the built-in battery of the terminal provides electric energy for the whole terminal. Under the condition that the terminal is connected with the solar panel, the solar panel inputs the electric energy generated by the conversion of the light energy into the built-in battery of the terminal through the built-in solar charging circuit 200 of the terminal to charge the built-in battery of the terminal, and meanwhile, the electric energy generated by the conversion of the light energy of the solar panel can also supply power to the power utilization system of the whole terminal. When an external power supply is connected (including an external AC mains supply and an adapter power supply), the external power supply charges a battery built in the terminal by cutting off the electric energy input of the solar panel of the terminal, and the external power supply supplies power to the whole power utilization system of the terminal. The invention can realize the dynamic enabling of solar energy. The "dynamic enabling of solar energy" refers to dynamically turning off the solar charging unit, so that the electric energy generated by the solar panel through the conversion of the light energy can be dynamically input into the power utilization unit of the terminal. Specifically, when an external power supply (such as an adapter power supply) is connected to the terminal, the solar charging unit is turned off, and the electric energy generated by the solar panel through conversion of the light energy cannot be input into the built-in battery and other power utilization units of the terminal, so that the situation that the battery is charged by the solar energy and the external power supply at the same time, and the charging current exceeds the set current value, so that the battery is damaged is avoided.

Preferably, the terminal is not connected with the solar panel and is not connected with an external power supply, and the equipment in the terminal is powered by the built-in battery. After the solar panel is connected with the terminal built-in battery through the solar charging module, the solar panel charges the built-in battery. Preferably, the electric energy generated by the solar panel can supply power to the equipment in the terminal under the condition that the electric energy charged by the solar panel to the built-in battery of the terminal through the solar charging module is still sufficient after the battery is charged. Preferably, in the state of the connection of the external power supply, the terminal cuts off the electric energy input of the solar panel, and the equipment in the terminal is powered by the external power supply. Preferably, the device is connected to a power supply source through a power selection circuit 500. After the commercial power in the external power supply is connected with the AC-to-DC module in the terminal, the commercial power is connected to the VDC input terminal 420 in the power selection circuit 500. An adapter in the external power supply is wired into the VDC input 420 in the power selection circuit 500. An external power source is connected to a semiconductor device through the VDC input terminal 420 and then connected to the built-in battery interface 230 to charge the battery. Preferably, when the terminal detects external power access (or power access at the VDC input 420), the terminal may cut off the solar panel's power input to the terminal by turning off the solar charging chip or putting the solar chip into a sleep state. Preferably, the battery supplies power to the device through a built-in battery interface 230 in the power selection circuit 500.

For devices employing multiple power sources as in the present invention, the battery and/or external power source will generally sink current to the solar charging circuit, typically using battery power and/or external power. The multi-power-supply path management scheme can prevent the battery and/or the external power supply from flowing current back to the solar charging circuit. Under the condition that the level of the built-in battery interface 230 is greater than the level of the solar input end, the solar charging chip integrated in the terminal of the invention enters a dormant state, and the quiescent current of the solar charging chip after dormancy is less than 15 muA and far lower than that of a solar controller (solar charging chip) adopting external arrangement. Through this mode of setting up, can avoid the battery to flow backward the electric current and give solar charging circuit, solve the great problem of quiescent current, it is extravagant to have reduced the consumption.

The terminal of the invention takes the access state of the external power supply as a trigger signal. Under the condition that an external power is connected to the terminal, the VDC connection detecting circuit 400 of the present invention detects the connection of the external power and transmits the detected signal to the solar charging chip control circuit 300, and the solar charging chip control circuit 300 makes the solar charging circuit 200 enter a sleep state, and the solar charging function of the present invention is forcibly turned off regardless of whether the solar panel generates electric energy. The solar charging circuit 200 with the solar charging function turned off can avoid the problem that the solar module is reversely charged under the condition that the terminal is connected to an external power supply, and can avoid the abnormality caused by the fact that the solar panel continuously charges the battery, in addition, the static current of the solar module can be reduced to 30 muA through the setting mode, and the problems that the static current is large and much power consumption is wasted are successfully solved.

The terminal integrates the solar charging module which is originally an independent structure into the terminal. The solar charging module with an independent structure is prevented from being easily damaged by rainwater, sand and other environmental factors when being exposed after being installed.

The invention can also set the element parameters of the solar charging circuit and limit the specification of the solar panel used by the terminal. The solar charging circuit after setting is adapted with the solar panel of limited specification, successfully solves the problem that solar energy power supply dissipation is too big, and electric current is overloaded and other harm equipment.

Preferably, the terminal provided by the present invention at least comprises a processing module 100, a solar charging circuit 200, a charging chip control circuit 300, a VDC access detection circuit 400, a power selection circuit 500 and an AC-to-DC module (not shown). Deployment and use scenes of the terminal are divided into power supply scenes and non-power supply scenes according to whether the power supply scenes can be provided or not. The power supply scene is divided into two scenes of sufficient deployment space and insufficient deployment space. The deployment space is sufficient to provide adapter power for use by the device. The arrangement space is not enough and only can directly provide an external alternating current power supply for equipment. The scene without power supply is divided into two situations of sufficient sunlight and insufficient sunlight. The terminal device must be provided with a built-in battery without a power supply. Under the condition of sufficient sunlight, the solar panel can be accessed. In the case of insufficient sunlight, the terminal equipment can only be powered by a built-in battery. Preferably, the terminal provided by the invention integrates 4 power supplies, namely a solar power supply, an external adapter power supply, a battery power supply and an external alternating current power supply. It is also possible to use only at least two of the 4 power sources according to the specific requirements. Preferably, the terminal provided by the invention can be deployed in all power supply use environments.

The existing solar charging modules are all independent structures. In actual deployment, the solar charging module is exposed after being installed. This condition makes the solar charging module highly vulnerable to damage. Particularly, in the case where the solar charging module is deployed in the field, the solar charging module is easily damaged by rainwater, dust and other environmental factors. The terminal provided by the present invention preferably integrates a solar charging module on the PCB circuit board of the terminal in the form of a solar charging circuit 200. The device is not enough in the deployment space and only can directly provide external alternating current power supply for the equipment. The AC to DC module 800 is preferably integrated into a PCB circuit board inside the terminal. The processing module 100, the solar charging circuit 200, the charging chip control circuit 300, the VDC access detection circuit 400, the AC-to-DC module, and the power selection circuit 500 are preferably integrated on a PCB circuit board inside the terminal.

The invention avoids the use of external module integration, which results in large volume. And a plurality of lines are not required to be accessed during field installation, so that the error rate of constructors is reduced, and the time spent is shorter. The solar energy is integrated on the PCB from the electric module, so that the problem that the external solar charging module is large in size is successfully solved. The solar charging module which is originally an independent structure is integrated into the terminal. The solar charging module is prevented from being damaged by rainwater, sand and other environmental factors in actual deployment, particularly in the case of field deployment.

Preferably, the invention can set the element parameters of the solar charging circuit, and define the specification of the solar panel used by the terminal. The solar charging circuit after setting is adapted with the solar panel of limited specification, successfully solves the problem that solar energy power supply dissipation is too big, and electric current is overloaded and other harm equipment.

Although the multi-power management scheme of the present invention is as sophisticated as possible, extremes are still possible. For example, when a terminal (e.g., a terminal disposed on a cliff for geological disaster monitoring and early warning) deployed in the field and having no external power supply and being unable to reach the environment for a short time encounters extreme weather (e.g., overcast and rainy weather for a very long time), the solar panel cannot provide enough electric energy to the terminal, which results in over-discharge of a battery disposed in the terminal. After the battery is over-discharged, the battery cells are deeply released, so that the electric energy generated after the solar panel normally works cannot be charged into the battery, and the terminal cannot work. Preferably, the multi-power management terminal perfectly solves the problem that the electric energy generated after the solar panel normally works cannot be charged into the battery and the terminal cannot work due to the fact that battery cells are deeply released after the battery built in the terminal is over-discharged by arranging the solar charging self-recovery circuit.

A preferred solar charging circuit 200 of the present embodiment is integrated into the device as shown in fig. 1. The solar charging circuit 200 includes at least a solar input 210, a charging chip 220, and a built-in battery interface 230. Preferably, the charging chip 220 is a solar synchronous rectification controller model BQ 24650. Preferably, the solar input end 210 is connected to the piezoresistor and then grounded. The voltage-limiting protection element of the voltage-sensitive resistor is used for providing overvoltage protection for the sensitive element, and when the voltage applied to two ends of the voltage-sensitive resistor exceeds the voltage-sensitive voltage, the resistance value of the voltage-sensitive resistor is reduced, and a large amount of current is released. When the voltage-sensitive resistor does not act, the resistance value of the voltage-sensitive resistor is large, and the circuit is not influenced. Preferably, the model number of the piezoresistor can be 07D 390K. The solar input 210 is connected to the semiconductor and then grounded. Preferably, the semiconductor is a TVS diode. The chinese name for TVS diodes is transient suppression diodes. When it is subjected to instantaneous high-energy pulse, it can change its impedance state from original high-impedance state to low-impedance state in a very short time, and can clamp the voltage to a specific level so as to effectively protect equipment and circuit component. Preferably, the transient suppression diode may be of the type SMAJ24 CA. The solar input 210 is connected to a self-healing fuse. Preferably, the model of the self-healing fuse may be SMD1812P150 TF/24. The self-recovery fuse is connected with the semiconductor and then grounded. The semiconductor is a schottky diode rectifier. Preferably, the model number of the Schottky diode rectifier can be B360B-13-F60V 3A. And the self-healing fuse is connected with the light-emitting semiconductor and then connected to the STAT1 and STAT2 pins of the charging chip 220 through the protection resistor. The self-recovery fuse is connected with the capacitor and then grounded after being connected with the two parallel resistors. The self-recovery fuse is connected to the MPPSET pin of the charging chip 220 after being connected with a circuit in which a resistor and a capacitor are connected in parallel, and is grounded after being connected with the resistor. The self-healing fuse is connected to the power supply pin of the charging chip 220 after being connected to the resistor, and is connected to the capacitor ground. The self-recovery fuse is connected with the two parallel capacitors and then grounded. The self-healing fuse is connected to a first terminal of the first semiconductor device. Preferably, the first semiconductor device is a transistor. The REGN pin of the charging chip 220 is connected to the PH pin of the charging chip 220 after being connected to the semiconductor and the capacitor. The REGN pin of the charging chip 220 is grounded after being connected with the capacitor. The HIDRV pin of the charging chip 220 is connected to the second terminal of the first semiconductor device. The PH pin of the charging chip 220 is connected to the third terminal of the first semiconductor device and the first terminal of the second semiconductor device. The PH pin of the charging chip 220 is connected to the inductor and then connected to the SRP pin of the charging chip 220, and is grounded after being connected to the capacitor. The LODRV pin of the charging chip 220 is connected to the second terminal of the second semiconductor device. The GND pin of the charging chip 220 is grounded. The third terminal of the second semiconductor device is grounded. Preferably, the first semiconductor device and the second semiconductor device are both transistors. The transistor model may be Si7288 DP. The SRP pin of the charging chip 220 is connected to the SRN pin of the charging chip 220 after being connected to the parallel circuit of the resistor and the capacitor. The SRN pin of the charging chip 220 is connected to the multi-capacitor parallel circuit and then grounded. The SRN pin of the charging chip 220 is connected to the built-in battery interface 230. The solar panel converts light energy into electric energy, and then enters the circuit from the solar input end 210, and after being rectified by the charging chip 220, the battery is charged from the built-in battery interface 230.

Preferably, the charging circuit adjusts the type of the components used in the circuit according to the parameters of the built-in battery and the solar panel used. Through the setting mode, the charging circuit can adjust the charging current of the built-in battery interface 230, and further energy dissipation of the charging circuit is reduced. And compared with a general module, the solar charging module integrated on the terminal has high efficiency and controllable power consumption, and can adjust the current to protect the battery.

Fig. 2 shows a preferred solar charging chip control circuit 300 of the present embodiment. The solar charging chip control circuit 300 includes at least a charging chip first terminal 221, a first semiconductor switch 430, and a DC input signal terminal 240. The DC input signal terminal 240 is connected to the charging chip first terminal 221 through a circuit composed of a first semiconductor switch 430 and two resistors, one semiconductor device. Preferably, the semiconductor device is a high frequency switching diode. Preferably, the high frequency switching diode may be 1N4148 WS. Preferably, the first semiconductor switch 430 is a MOS transistor. Preferably, the MOS transistor may be FDN 340P.

As shown in fig. 1-2, preferably, the charging chip 220 may be a BQ 24650. The BQ24650 is a solar synchronous rectification controller supporting a maximum power point tracking function. In case that the level of the built-in battery interface 230 is greater than the level of the solar input terminal 210, the charging chip 220 enters a sleep state. The dormant current is less than 15 muA and far lower than that of an external solar controller. Through the setting mode, the problem that the static current is large is solved and the power consumption is reduced.

Preferably, the DC input signal terminal 240 represents an external power access signal. The DC input signal terminal 240 is low after the external power is switched on. The first end 221 of the charging chip is a thermistor access end. Preferably, the charging chip first terminal 221 may be TS. After the level of the first terminal 221 of the charging chip is pulled up to the reference voltage of the VREF pin of the charging chip 220, the solar charging chip 220 is forced to be turned off. When the DC input signal terminal 240 is at a low level, the first semiconductor switch 430 is turned on, and the first terminal 221 of the charging chip is forced to be pulled up to the reference voltage of the VREF pin of the charging chip 220. Preferably, the first semiconductor switch 430 may be an FDN 340P. The solar charging chip 220 is forcibly turned off. Through the setting mode, no matter whether the solar input end 210 is supplied with power or not, the BQ24650 chip is forcibly turned off, and the function of forcibly turning off solar charging after the power supply of an external power supply is connected is realized. And the problem that the solar module is reversely flowed by the external power supply can be avoided, and the abnormity caused by the fact that the solar panel continuously charges the battery can be avoided. In addition, the static current of the solar module can be reduced to be less than 30 muA by the arrangement mode, and only about 5mAh of electric energy of the battery is consumed in rainy days lasting for one week, so that the standby time of the device is remarkably prolonged. Preferably, if the solar charging chip 220 does not operate, the first semiconductor switch 430 is not turned on, and the current does not flow backward much, but only flows backward a small amount of current through the first semiconductor switch 430. The solar charging circuit 200 is only provided with the first semiconductor switch 430 and a direct backflow prevention device, so that the problem that the battery cannot be fully charged due to the voltage difference generated by the backflow prevention protection circuit when the solar energy normally charges the built-in battery of the terminal can be avoided.

Fig. 3 is a schematic diagram of a preferred VDC access detection circuit 400 of this embodiment. The VDC access detection circuit 400 includes at least a DC input signal terminal 240, a VDC input terminal 420, a system power supply terminal 410, and a second semiconductor switch 431. The VDC input is connected to the system power supply 410 through a semiconductor. Preferably, the model of the semiconductor may be B360B-13-F60V 3A. The VDC input terminal 420 is connected to the DC input signal terminal 240 through a switching circuit. Preferably, the switching circuit comprises a second semiconductor 431 and at least one resistor and at least one semiconductor device. Preferably, the model of the semiconductor device may be 1N4148 WS. Preferably, the second semiconductor switch 431 may be FDN 335N. After the external power VDC is connected to the VDC input terminal 420, the second semiconductor switch 431 is turned on, so that the DC input signal terminal 240 is forced to be pulled low, thereby controlling the solar charging chip 220 to be turned off. And the external power VDC supplies power to the entire system through the system power terminal 410.

Fig. 4 is a schematic diagram of a preferred power selection circuit 500 of the present embodiment. The power selection circuit 500 includes at least a VDC input terminal 420, a third semiconductor switch 432, a fourth semiconductor switch 433, a system power supply terminal 410, and an internal battery interface 230. The VDC input 420 is connected to the internal battery interface 230 through a semiconductor. Preferably, the semiconductor may be B360B-13-F60V 3A. The VDC input terminal 420 and the internal battery interface 230 are connected to the system power supply terminal 410 through a circuit composed of the third semiconductor switch 432, the fourth semiconductor switch 433, and a resistor and a semiconductor device. Preferably, the third semiconductor switch 432 may be the AOD 403. Preferably, the fourth semiconductor switch 433 may be FDN 335N. Preferably, the built-in battery interface 230 is connected to the third semiconductor switch 432 through a semiconductor. Preferably, the semiconductor may be B360B-13-F60V 3A. The VDC input 420 is connected through a semiconductor to two resistors and a third semiconductor switch 432. Preferably, the semiconductor may be 1N4148 WS. The system power supply terminal 410 supplies power to the whole device. The internal battery interface 230 is directly conductive to the system power supply terminal 410 by default. I.e. the third semiconductor switch 432 is turned on by default. When the VDC is connected, the path between the internal battery interface and the system power supply terminal 410 is directly closed. The circuit at the back stage of the system power supply terminal 410 has a large capacitance. The system power supply 410 is able to quickly switch between the internal battery interface or VDC input 420. And the situation of no power supply for a long time can not occur. VDC is connected from the VDC input terminal 420, and then is directly charged to the constant current and the constant voltage of the built-in battery interface through a semiconductor.

Preferably, as shown in fig. 5, a solar second charging chip control circuit 600. Including at least a DC input signal terminal 240, a first semiconductor switch 430, a second semiconductor switch 431, a resistor 320, and a charging chip second terminal 222. Preferably, in the solar charging circuit shown in fig. 1, the operating state of the charging circuit can be controlled by controlling the second end 222 of the charging chip, so as to manage the power path. The DC input signal terminal 240 is connected to the second terminal 222 of the charging chip through the first semiconductor switch 430, the second semiconductor switch 431, the resistor 320 and other circuits formed by resistors and semiconductors. Preferably, the semiconductor may be 1N148 WS. Preferably, the second end 222 of the charging chip may be MPPSET.

Preferably, the DC input signal terminal 240 is an external power access signal. The DC input signal terminal 240 is low after the external power is switched on. The charging chip second terminal 222 is an input voltage setting terminal. After the level of the second terminal 222 of the charging chip is pulled down to ground, the solar charging chip is turned off. After the DC input signal terminal 240 is low, the first semiconductor switch 430 is turned on. Preferably, the first semiconductor switch 430 may be an FDN 340P. The voltage at the upper end of the resistor 320 is pulled high, the second semiconductor switch 431 is turned on, and the second end 222 of the charging chip is pulled low. Preferably, the second semiconductor switch 431 may be FDN 335N. The solar charging chip 220 is forcibly turned off. The charging chip 220 is forced to be turned off regardless of whether the solar input 210 is powered or not. The function of forcibly turning off the solar charging after the power supply of the external power supply is connected is realized. The solar module is prevented from being reversely flowed with current by an external power supply. And meanwhile, the abnormity caused by the fact that the solar panel continuously charges the battery is avoided. Preferably, the present invention may provide an electronic switch such as a relay on a line connecting the solar charging circuit 200 and the internal battery interface 230. An electronic switch arranged on a line connecting the solar charging circuit 200 and the built-in battery interface 230 is connected with and controlled by the DC input signal terminal 240, and when the DC input signal terminal 240 is an external power supply access signal electronic switch, the solar charging circuit 200 is disconnected from the built-in battery interface 230, so that no matter whether the charging chip works, the solar energy can not charge the battery. At this time, there is no problem of power consumption waste caused by the current of the battery built in the terminal or the external power source flowing back to the solar charging circuit 200.

Preferably, the AC-to-DC module in this embodiment at least includes a transformer, an AD chip, and a rectifying and filtering circuit. And after the external alternating current commercial power is accessed, the direct current DC is output through the AC-to-DC module. The interface for the AC to DC module output DC is connected to the VDC input 420 in common with the adapter power interface.

Fig. 6 shows a solar charging self-recovery circuit. When the solar panel charges the terminal-built-in battery using electric power generated by light energy, the charging chip 220 applies a pre-charging current to the battery if the built-in battery voltage of the terminal is lower than a minimum voltage threshold (i.e., the battery is over-discharged). This function is intended to restore deeply released cells. Preferably, the precharge timer is fixed for 30 minutes. After the precharge is started for 30 minutes, if the battery voltage does not reach the lowest voltage threshold value, the precharge function is closed, a fault is displayed on a status pin of the charging chip 220, and the solar charging function is closed. The charging chip 220 transmits a fault signal displayed on the status pin to the microcontroller 250, the microcontroller 250 outputs a signal to turn off the fifth semiconductor switch 434 after being turned on, so that the solar charging circuit 200 is reset, the charging chip 220 applies the pre-charging current to the battery again, and the solar energy starts pre-charging again; and repeating the steps until the voltage of the battery arranged in the terminal reaches the minimum voltage threshold, finishing the pre-charging, and entering normal constant current charging. Preferably, the charging chip 220 may be a BQ 24650. Preferably, microcontroller 250 may be PIC10F 200. Preferably, the fifth semiconductor switch 434 may be FDN 340P. When the status pins of the BQ24650 are STAT1 and STAT2, and faults are displayed on the status pins of the BQ24650, fault signals on the status pins STAT1 and STAT2 are transmitted to the PIC10F200, the PIC10F200 outputs signals to enable the FDN340P to be turned on and then turned off, the chip setting end MPPTET of the BQ24650 is grounded, the solar charging circuit 200 is reset, and the solar energy starts to be precharged again; and repeating the steps until the voltage of the battery reaches the minimum voltage threshold, finishing the pre-charging and entering the constant current charging.

FIG. 7 is a block diagram of a preferred embodiment of the process module of the present invention. The terminal of the invention ensures the power supply of internal devices of the terminal such as the processing module shown in figure 7 through multi-power management, and ensures that the terminal can work normally for a long time.

Example 2

The embodiment discloses a multi-power management method. The power management method can be applied to an edge computing terminal, a data acquisition terminal, a router, a signal transmitting terminal, a data acquisition wireless relay and a sensor. The method of the present embodiment may be implemented by the terminal of the present invention and/or other alternative components. For example, the method disclosed in the present embodiment is implemented by using various components in the terminal of the present invention. The preferred embodiments of the present invention are described in whole and/or in part in the context of other embodiments, which can supplement the present embodiment, without resulting in conflict or inconsistency.

Referring to fig. 8, the method includes the following steps.

S100: first, whether the VDC is accessed is determined.

S201: disconnecting the rechargeable battery from the system power supply unit if the VDC is accessed,

s202: the VDC is coupled to the charging battery for charging if the VDC is coupled,

s203: if the VDC is connected to the system power supply unit,

s204: and if the VDC is accessed, the solar charging circuit is closed.

S300: if the VDC is not accessed, the rechargeable battery is connected to the system power supply unit and supplies power, and S400 determines whether the solar panel is accessed.

S500: no other operation is performed if the solar panel is not accessed.

S600: if the solar panel is connected, the solar charging circuit is started,

s700: and judging whether the level of the interface of the built-in battery is greater than the level of the solar energy input end.

S800: and if the level of the built-in battery interface is greater than that of the solar input end, the chip enters a dormant state.

S900: and if the level of the built-in battery interface is not greater than the level of the solar input end, the solar panel charges the rechargeable battery.

The VDC in S100 comprises a VDC output by an external adapter power supply and a VDC converted by an AC-to-DC module after an external mains supply is connected with a terminal.

Preferably, the terminal includes at least a solar charging circuit 200, a charging chip control circuit 300, a VDC access detection circuit 400 and a power selection circuit 500. Preferably, the power selection circuit 500 is connected to the charging chip control circuit 300 through the VDC access detection circuit 400. The charging chip control circuit 300 is connected to the solar charging circuit 200. The VDC access detection circuit 400 monitors the power access condition of the power selection circuit 500 and transmits the monitored condition to the charging chip control circuit 300 in the form of an electrical signal. The charging chip control circuit 300 controls the solar charging circuit 200 to be turned on/off after receiving the electrical signal transmitted by the VDC access detection circuit 400.

Preferably, the solar charging circuit 200, the charging chip control circuit 300, the VDC access detection circuit 400, the power selection circuit 500, the AC-to-DC module and their connected components adopted in this embodiment are the same as those in embodiment 1, and are not described herein again.

It should be noted that the above-mentioned embodiments are exemplary, and that those skilled in the art, having benefit of the present disclosure, may devise various arrangements that are within the scope of the present disclosure and that fall within the scope of the invention. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents.

Claims

1. A multi-power management terminal at least comprises a solar charging circuit (200), a charging chip control circuit (300), a VDC access detection circuit (400) and a power selection circuit (500),

it is characterized in that the preparation method is characterized in that,

the power selection circuit (500) is connected to the charging chip control circuit (300) through the VDC access detection circuit (400), the charging chip control circuit (300) is connected to the solar charging circuit (200),

the VDC access detection circuit (400) is configured to monitor a power access condition of the power selection circuit (500) and transmit the monitored condition to the charging chip control circuit (300) in the form of an electrical signal;

the charging chip control circuit (300) is configured to control the solar charging circuit (200) to be turned on/off after receiving the electric signal transmitted by the VDC access detection circuit (400).

2. The multi power management terminal of claim 1, wherein the solar charging circuit (200) comprises at least a solar input (210), a charging chip (220) and an internal battery interface (230),

the solar energy input end (210) is connected with the built-in battery interface (230) through the charging chip (220), and the charging chip (220) controls electric energy input from the solar energy input end (210) to enter the built-in battery interface (230).

3. The multi power management terminal according to claim 1 or 2, wherein the solar charging chip control circuit (300) comprises at least a charging chip first terminal (221), a first semiconductor switch (430) and a DC input signal terminal (240),

the DC input signal terminal (240) transmits the power supply connection condition of the power supply selection circuit (500) to the first terminal (221) of the charging chip in the form of an electric signal through the first semiconductor switch (430), and the charging chip (220) receives the electric signal through the first terminal (221) of the charging chip.

4. The multi power management terminal according to one of the preceding claims, wherein the VDC access detection circuit (400) comprises at least a VDC input (420), a system supply terminal (410) and a second semiconductor switch (431),

the VDC input terminal (420) is configured to supply power to the system power supply terminal (410) after an external power source is connected, and the VDC input terminal (420) transmits an electrical signal to the DC input signal terminal (240) through the second semiconductor switch (431).

5. Multiple power management terminal according to one of the preceding claims, wherein the power selection circuit (500) comprises at least the VDC input (420), a third semiconductor switch (432), a fourth semiconductor switch (433), the system power supply (410) and the built-in battery interface (230),

-said third semiconductor switch (432) is configured to be in a conducting state in case no external power is connected to said VDC input (420);

the built-in battery interface (230) supplies power to the system power supply terminal (410) through the third semiconductor switch (432), and

in the case of an external power supply access to the VDC input (420), the third semiconductor switch (432) is turned off and the fourth semiconductor switch (433) is turned on, so that the system power supply (410) obtains power from the VDC input (420).

6. The multi power management terminal as claimed in one of the above claims, wherein the solar input end (210) is connected to an external solar panel, and the solar input end (210) inputs the electric energy converted from light energy to the solar charging circuit (200).

7. Multiple power management terminal according to one of the preceding claims, wherein an internal battery is connected at the internal battery interface (230), wherein,

the built-in battery interface (230) charges the built-in battery and supplies power to the system power supply terminal (410).

8. The multi power management terminal according to one of the preceding claims, wherein the external power input at the VDC input (420) comprises a DC power provided by an adapter and a DC power converted from AC mains by an AC to DC module.

9. Multiple power management terminal according to one of the preceding claims, wherein the terminal further comprises a second charging chip control circuit (600), the second charging chip control circuit (600) comprising at least a DC input signal terminal (240), a first semiconductor switch (430), a second semiconductor switch (431), a resistor (320) and a charging chip second terminal (222),

the DC input signal terminal (240) transmits the monitored power supply access condition of the power supply selection circuit (500) to the charging chip second terminal (222) through a circuit composed of the first semiconductor switch (430), the second semiconductor switch (431) and the resistor (320) in the form of an electric signal, and the charging chip (220) controls the solar charging circuit (200) to be turned on/off through the signal received by the charging chip second terminal (222).

10. A method for multiple power management, the method comprising:

the power selection circuit (500) is connected to the charging chip control circuit (300) through the VDC access detection circuit (400);

the charging chip control circuit (300) is connected with the solar charging circuit (200);

the VDC access detection circuit (400) monitors the power access condition of the power selection circuit (500) and transmits the monitored condition to the charging chip control circuit (300) in the form of an electric signal;

the charging chip control circuit (300) controls the solar charging circuit (200) to be turned on/off after receiving the electric signal transmitted by the VDC access detection circuit (400).