Multi-channel power supply switching electric quantity acquisition system

Abstract

The invention discloses a multichannel power supply switching electric quantity acquisition system, which belongs to the technical field of standby power supply switching and comprises a storage battery, a mains supply end, a first intelligent switcher and a second intelligent switcher. The device further comprises a solar panel, the output end of the solar panel is electrically connected with a solar controller, the solar controller is electrically connected to the first input end of the first intelligent switcher, and the output end of the first intelligent switcher is electrically connected to the storage battery. The output end of the storage battery is electrically connected to the first input end of the second intelligent switcher, and the output end of the second intelligent switcher is electrically connected to the terminal through the main control board; the first output end of the mains supply end is electrically connected to the second input end of the second intelligent switcher through an inverter. The system has the advantage of seamlessly switching the commercial power and the storage battery.

Description

Technical Field

[0001] The invention belongs to the technical field of backup power supply switching, and in particular relates to a multi-channel power supply switching power collection system. Background Art

[0002] In today's society, with the rapid development of science and technology, various types of electrical equipment are widely popularized, and the demand for stable, reliable and efficient power supply systems is becoming increasingly prominent. Whether it is precision instruments and equipment in industrial production, numerous electrical facilities in commercial operation sites, or smart home equipment that is indispensable in daily life, continuous and uninterrupted power supply has become a key factor in ensuring their normal operation, avoiding interruptions in production and life, and preventing data loss or equipment damage. Traditional power supply methods often rely on a single power source, such as relying solely on the mains power grid for power supply. Although the mains power has the advantages of relative stability and large power capacity, and can meet the needs of most conventional power consumption scenarios, it is extremely susceptible to interference from external factors. Situations such as severe weather (heavy rain, strong winds, and blizzards causing damage to transmission lines), power system failures (substation maintenance, transmission line short circuit tripping, etc.), and power grid overload during peak hours of electricity consumption frequently occur, which leads to frequent mains power outages, causing many inconveniences and even serious losses to electrical equipment.

[0003] In order to deal with the drawbacks of the single power supply of the mains, some power supply systems have introduced solar energy and batteries as auxiliary or backup power sources. However, the existing technology cannot achieve seamless switching between solar energy, batteries and mains, and cannot allow the equipment to instantly switch to solar energy and batteries when the mains power is suddenly cut off. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a multi-channel power supply switching power collection system, which has the advantage of seamless switching between mains power and batteries, and solves the problems of the prior art.

[0005] The present invention is implemented as follows: a multi-channel power switching power collection system includes a battery, a mains power supply end, a first intelligent switch and a second intelligent switch. It also includes a solar panel, the output end of the solar panel is electrically connected to a solar controller, the solar controller is electrically connected to the first input end of the first intelligent switch, the output end of the first intelligent switch is electrically connected to the battery, the output end of the battery is electrically connected to the first input end of the second intelligent switch, the output end of the second intelligent switch is electrically connected to the terminal through the main control board; the first output end of the mains power supply end is electrically connected to the second input end of the second intelligent switch through an inverter.

[0006] As a preferred embodiment of the present invention, the main control board includes a first control unit, which is used for: when the amount of electricity generated by solar energy is not less than the amount of electricity required by the load, the solar panel generates electricity to charge the battery through the solar controller and the first intelligent switch, and at the same time the battery serves as a power source to supply power to the terminal through the second intelligent switch and the main control board, and the first output end of the AC power supply end is not powered.

[0007] As a preferred embodiment of the present invention, the main control board includes a second control unit, and the second control unit is used for: when the amount of electricity generated by solar energy is less than the amount of electricity required by the load, the mains power supply end and the storage battery cooperate to supply power to the terminal load; The AC power is controlled to be output from the power supply end, and the AC power is first converted into DC power suitable for load and battery charging by the inverter, and then connected to the second input end of the second intelligent switch.

[0008] As a preferred embodiment of the present invention, the main control board includes a third control unit, and the third control unit is used to: when the mains power is cut off or the battery is damaged, control the second intelligent switch to switch to a single power supply form. If the mains power is cut off, the battery will supply power to the terminal load alone; if the battery is damaged, the mains power supply will supply power to the terminal load alone after conversion by the inverter.

[0009] As a preferred embodiment of the present invention, the second output end of the mains power supply end is electrically connected to the second input end of the first intelligent switch through a charger, so as to charge the battery through the mains power supply end.

[0010] As a preferred embodiment of the present invention, the main control board includes a fourth control unit, and the fourth control unit is used to select a power supply mode after the mains power is repaired: It is used to evaluate the power supply mode after the mains power is restored. Assume that the probability of unexpected power outage within the next preset time is , the time interval of unexpected power outage is , the remaining battery power is , the solar power supply capacity is ,in: For the first power supply mode, the evaluation value is , is the weight coefficient; For the second power supply mode, the evaluation value is , is the weight coefficient; For the third power supply mode, the evaluation value is , is the weight coefficient; And the power supply mode selection rule is: if and , then select the first power supply mode; if and , then choose the second power supply mode; if and , then select the third power supply method.

[0011] As a preferred embodiment of the present invention, the first intelligent switch includes a charging determination and power distribution module; The charging determination and power allocation module is executed according to the following steps: when and When the first intelligent switch starts the charging process; Calculate the power allocated to battery charging : ; in, Indicates at time The electrical power output of the solar panels; : represents the moment The remaining battery capacity; : The maximum charging power allowed by the battery; : The comprehensive energy conversion efficiency during the charging process from the solar panel through the first intelligent switch to the battery.

[0012] As a preferred embodiment of the present invention, the first intelligent switch further includes an auxiliary discharge determination and power limitation module; The auxiliary discharge determination and power limitation module is executed according to the following steps: Assume the load demand power is ,when and When the battery is discharged and replenished through the first intelligent switch; Calculate battery auxiliary discharge power : ; in, Indicates at time The electrical power output of the solar panels; : represents the moment The remaining battery capacity; : The maximum charging power allowed by the battery; : The minimum discharge power set for the battery; : The comprehensive energy conversion efficiency during the charging process from the solar panel through the first intelligent switch to the battery.

[0013] As a preferred embodiment of the present invention, the second intelligent switch includes a power supply distribution determination module and an emergency power supply allocation module; The power distribution determination module is executed according to the following steps: when Can support and In the preset range, solar energy is used to supply power through batteries; If solar energy is insufficient ( ) but the mains power is normal and Sufficient, enter the stage of coordinated power supply of mains and batteries, calculate the power supply of each: ; ; The second intelligent switch also includes: The emergency power supply deployment module is executed according to the following steps: when or When the threshold is exceeded and the original power supply is unbalanced, and the mains power is normal: ; ; when , the system switches to battery power supply alone:

[0014] When the utility power is cut off and restored: If the first power supply method is selected according to the rules, then:

[0015] ; in Provide additional power to the mains compared to before; If the second power supply method is selected, then: ; ; If the third power supply method is selected, then: ; ; in, : represents the moment The electrical power required by the terminal load; : represents at time The remaining battery capacity; : Indicates at time The electrical power output of the solar panels; :time The effective electric power that can be provided by the mains power supply and adapted by the inverter; : The maximum discharge power allowed by the battery; : The minimum effective power supply power set by the mains; α, β: weight coefficients.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 3. Solutions to technical problems 1. Efficient energy utilization and energy saving: Make full use of solar energy, a clean energy source, to collect electricity during the daytime when the sun is abundant and store it in batteries, reduce dependence on the mains, and reduce traditional electricity consumption, especially in long-term operation scenarios, which greatly reduces electricity costs and energy consumption. Even at night or when solar energy is insufficient, the mains power supply is combined with the battery power supply, so that the mains power consumption is accurately controlled within the range of supplementing the shortage, maximizing the advantages of solar energy and conforming to the concept of green energy saving.

[0017] 2. Improved power supply stability and reliability: With multiple power supply channels (solar energy, battery, mains power) and intelligent switching mechanisms, it can effectively deal with various power supply anomalies. For common power supply problems such as solar power generation failure due to bad weather and power outages due to mains power grid maintenance, the system can complete the switching action in milliseconds to maintain stable power supply to the terminal, avoid equipment downtime and data loss due to power fluctuations and interruptions, and ensure the reliable operation of facilities such as communication base stations and monitoring equipment that are sensitive to power supply continuity.

[0018] 3. Extend equipment life and reduce maintenance costs: Stable power supply prevents terminal equipment from repeated start-stop and voltage shock, which is conducive to extending the service life of equipment hardware. At the same time, the intelligent switch controls the reasonable charging and discharging of the battery to prevent overcharging and over-discharging, maintain battery health, and reduce the frequency of frequent battery replacement; the system structure is clear, the modules are divided into different parts, and faults can be easily located and repaired quickly, which reduces the long-term comprehensive operating costs from multiple dimensions of equipment life and operation and maintenance convenience.

[0019] 4. Flexible adaptation to multiple power usage scenarios: Whether it is industrial control and data center fields with strict requirements on power supply stability, or remote monitoring points and outdoor small facilities that are decentralized and have small power consumption but require continuous power supply, they can be flexibly deployed on demand, and power supply can be flexibly allocated according to actual light, power load, city power conditions, etc., so as to meet the needs of efficient and stable power supply in different environments with one system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1is a system block diagram provided by Embodiment 1 of the present invention; Figure 2 This is a system block diagram provided by Example 2 of the present invention. DETAILED DESCRIPTION

[0021] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0022] The structure of the present invention is described in detail below in conjunction with the accompanying drawings. Example 1

[0023] like Figure 1 As shown, a multi-channel power switching power collection system provided by an embodiment of the present invention includes a battery, a mains power supply end, a first intelligent switch and a second intelligent switch, and also includes a solar panel, the output end of the solar panel is electrically connected to a solar controller, the solar controller is electrically connected to a first input end of the first intelligent switch, the output end of the first intelligent switch is electrically connected to the battery, the output end of the battery is electrically connected to a first input end of the second intelligent switch, and the output end of the second intelligent switch is electrically connected to a terminal through a main control board; The first output end of the commercial power supply is electrically connected to the second input end of the second intelligent switch through an inverter.

[0024] With the above settings, the usage process is as follows: Solar charging and power supply process: When there is sufficient sunlight during the day, the solar panel converts light energy into electrical energy output. After the solar controller performs intelligent control such as voltage regulation and overcharge protection, the stable and adaptive electrical energy is transmitted to the first input end of the first intelligent switch. The first intelligent switch plays the channel selection and control functions to guide solar electricity into the battery to realize the charging and storage process. During this period, it can flexibly control the charging process according to the battery power status (such as continuous charging when the battery is not full, and adjusting the charging current when it is almost full). At the same time, the first input end of the second intelligent switch connected to the battery output end is ready for power supply. Once the load has demand, the battery can transmit power to the terminal through the second intelligent switch and the main control board to ensure the operation of the equipment.

[0025] Insufficient solar energy or nighttime power supply logic: When the amount of electricity generated by solar energy is difficult to meet the needs of the load (the load demand increases, the light becomes weaker, resulting in reduced power generation, or there is no light generation at night), the system automatically enables the mains as a supplementary power source. The mains is output from the power supply end, and the inverter first converts the AC power into DC power that is suitable for the load and battery charging, and then connects to the second input end of the second intelligent switch. At this time, the second intelligent switch finely adjusts the battery and mains supply based on preset strategies (such as giving priority to ensuring the stable operation of critical loads, allocating battery and mains power supply in proportion, etc.), allowing the two to work together to power the load, and the battery power is the main support, and the mains power is the auxiliary support to maintain the stable energy supply state of the system.

[0026] Fault emergency switching mechanism: In the face of a sudden power outage, the second intelligent switch can monitor the lack of AC input in real time, quickly cut off the AC power supply line, and seamlessly switch to an independent power supply mode where only the battery is used to supply power to the terminal, thereby ensuring the continuous operation of critical loads by relying on the battery reserve power. If the battery is damaged and cannot output power normally, the second intelligent switch will also be able to detect it sensitively and immediately cut off its power supply link and switch to a single AC power supply (if the AC power is normal), thereby responding to power failures, achieving uninterrupted power supply switching, and protecting the smooth operation of terminal equipment.

[0027] Specifically, the main control board includes a first control unit, which is used for: when the amount of electricity generated by solar energy is not less than the amount of electricity required by the load, the solar panel generates electricity to charge the battery through the solar controller and the first intelligent switch, and at the same time the battery serves as a power source to supply power to the terminal through the second intelligent switch and the main control board, and the first output end of the AC power supply end is not powered.

[0028] Specifically, the main control board includes a second control unit, and the second control unit is used to: when the amount of electricity generated by solar energy is less than the amount of electricity required by the load, the mains power supply end and the storage battery cooperate to supply power to the terminal load; The AC power is controlled to be output from the power supply end, and the AC power is first converted into DC power suitable for load and battery charging by the inverter, and then connected to the second input end of the second intelligent switch.

[0029] Specifically, the main control board includes a third control unit, which is used to: when the AC power is cut off or the battery is damaged, control the second intelligent switch to switch to a single power supply form. If the AC power is cut off, the battery will supply power to the terminal load alone; if the battery is damaged, the AC power supply will supply power to the terminal load alone after conversion by the inverter. Example 2

[0030] See also Figure 2 , based on Example 1, the following settings are also performed: The second output end of the mains power supply end is electrically connected to the second input end of the first intelligent switch through a charger, and is used to charge the battery through the mains power supply end.

[0031] Furthermore, the main control board includes a fourth control unit, and the fourth control unit is used to select a power supply mode after the mains power is restored: It is used to evaluate the power supply mode after the mains power is restored. Assume that the probability of unexpected power outage within the next preset time is , the time interval of unexpected power outage is , the remaining battery power is , the solar power supply capacity is ,in: For the first power supply mode (mains and batteries supply power simultaneously and the mains supply is increased to charge the batteries), the evaluation value is , is the weight coefficient; For the second power supply mode (mains power supply alone and solar power charging battery), the evaluation value is , is the weight coefficient; For the third power supply mode (mains power supply alone and solar power charging batteries, and mains power also charging batteries), the evaluation value is , is the weight coefficient; And the power supply mode selection rule is: if and , then select the first power supply mode; if and , then choose the second power supply mode; if and , then select the third power supply method.

[0032] Specifically, during normal use during the day, the battery can be charged by solar energy, and then the battery supplies power to the load; if the amount of electricity generated by solar energy is not enough for the load, or the load requires more electricity, or the amount of electricity generated by solar energy decreases, the load is powered by both the mains and the battery (solar energy supplies power to the battery), in which the battery is the main power source and the mains is the auxiliary power source; When the mains power is unexpectedly cut off, the battery is charged by solar energy, and then the battery supplies power to the load. When the battery power is not exhausted, after the mains power is restored, there are several power supply methods: First, use the previous mode: the AC power and the battery (solar energy supplies power to the battery) supply power to the load at the same time, but at this time, the supply of AC power to the load is increased by a constant on the basis of the previous one, and the supply of battery to the load can be reduced by a constant. In this way, the battery can be gradually charged, and when it is full, it returns to the previous mode.

[0033] Second, considering that there is still a probability of unexpected power outages in the next few hours after the mains is restored, after the mains is restored, the loads are powered entirely by the mains, while the solar energy charges the batteries. If the mains is cut off again, the battery power can supply the loads for a longer time; Third, based on the second situation, if it is predicted that the probability of unexpected power outages in the next few hours is higher after the mains is restored, then after the mains is restored, not only will the loads be fully powered by the mains and the solar energy will charge the batteries, but the batteries will also be powered by the mains.

[0034] Further, the first intelligent switch includes a charging determination and power distribution module; The charging determination and power allocation module is executed according to the following steps: when (i.e. solar energy produces effective electricity) and ( When is the full charge value of the battery (unit: Wh), the first intelligent switch starts the charging process; Calculate the power allocated to battery charging : ; This formula indicates that the actual charging power is the smaller value between the power of the solar panel output after efficiency loss and the maximum allowable charging power of the battery, ensuring safe and compliant charging and preventing overcharging from damaging the battery. For example, if the solar output power at a certain moment is 150W after efficiency conversion, and the maximum allowable charging power of the battery is 120W, then at this moment .

[0035] Furthermore, the first intelligent switch also includes an auxiliary discharge determination and power limitation module; The auxiliary discharge determination and power limitation module is executed according to the following steps: When the overall power supply of the system is tight, the city power is out and the solar energy is insufficient but the load urgently needs electricity to maintain basic operation, and the battery power is low but still requires emergency power supply, the first intelligent switch participates in auxiliary discharge control.

[0036] Assume the load demand power is ,when (Solar power is not enough to meet the load) and When the battery is discharged and replenished through the first intelligent switch; Calculate battery auxiliary discharge power : ; This formula ensures that the battery can supplement the power gap between solar power supply and load demand under the premise of meeting the minimum discharge protection. For example, if the load needs 80W power, solar energy can only provide 30W, and the minimum discharge power of the battery is set to 20W, then the auxiliary discharge power of the battery is 80-30=50 (greater than the minimum discharge power, meeting the formula rules).

[0037] The first intelligent switch monitors the overall power supply of the system and the power consumption of the load at all times, and cyclically compares the logical conditions of the above charging and discharging formulas. When the charging conditions are met, priority is given to ensuring safe and efficient charging; when facing a power supply crisis and requiring battery emergency, the discharge power is carefully allocated according to the rules to achieve intelligent and orderly management of the interaction between solar energy and battery power, which meets the requirements of flexible power supply and stable operation of multi-power systems.

[0038] Through these formula settings, the first intelligent switch accurately controls the power transmission path and power size under different working conditions, becoming one of the key hubs for the stable operation of the entire multi-channel power switching power collection system, taking into account energy utilization, battery life maintenance and load power supply guarantee. in, : Indicates at time The electrical power output of the solar panel (unit: watt, W) changes in real time with factors such as light intensity, sun angle, and weather conditions. It can be monitored by sensors and converted by a solar controller.

[0039] : represents the moment The remaining power of the battery (unit: watt-hour, Wh) is fed back to the first intelligent switch through the power monitoring circuit to determine the battery capacity status; : The maximum charging power allowed by the battery (unit: W), which is determined by the battery specifications and performance parameters. It is the upper limit of the charging power that can be tolerated under the premise of ensuring battery safety and extending battery life; : The minimum discharge power set for the battery (unit: W) to avoid over-discharge of the battery, damage to the battery cells, etc., and to maintain the power lower limit of the basic health state of the battery; : The comprehensive energy conversion efficiency (dimensionless, ranging from 0 to 1) from the solar panel to the battery charging process via the first intelligent switch, covering the influence of factors such as line transmission loss and conversion circuit efficiency.

[0040] Further, the second intelligent switch includes a power supply distribution determination module; The power distribution determination module is executed according to the following steps: when Can support and In the preset range (such as greater than the set power threshold to ensure subsequent stability), the solar energy through the battery power supply mode is adopted. At this time, the mains power is in standby or only maintains a low power to charge the battery.

[0041] If solar energy is insufficient ( ) but the mains power is normal and Sufficient, enter the stage of coordinated power supply of mains and batteries, calculate the power supply of each: ; ; in, : represents the moment The electric power required by the terminal load (unit: watt, W) can be obtained through real-time conversion of load current and voltage monitoring sensors, and it changes dynamically with the operating status of the load equipment (such as equipment startup, standby, full load operation, etc.).

[0042] : represents at time The remaining power of the battery (unit: watt-hour, Wh) is continuously fed back to the second intelligent switch through the power monitoring module to measure the energy reserve status of the battery.

[0043] : Indicates at time The electrical power output of the solar panel (unit: W).

[0044] :time The effective electric power (unit: W) that can be provided by the AC power supply and adapted by the inverter depends on the stability of the AC power access, the inverter conversion efficiency and the state of the AC power grid itself.

[0045] : The maximum discharge power allowed by the battery (unit: W), which is limited by the battery's own electrical performance, heat dissipation capacity and other specification parameters to ensure the power upper limit of safe and stable discharge.

[0046] : The minimum effective power supply power set by the mains (unit: W), which is set in consideration of factors such as the basic operating energy consumption of the mains access equipment and the minimum power requirement to maintain the operation of some modules of the system. A power lower than this is considered as an abnormality or close to failure.

[0047] α, β: weight coefficients (dimensionless, ranging from 0 to 1), corresponding to the priority of battery and mains in coordinated power supply, and dynamically adjusted according to the system operation strategy (such as energy saving priority, battery life protection priority, power supply stability priority, etc.) and current operating conditions. The initial value can be set based on experience and optimized during system operation.

[0048] In the above formula, the battery power supply The load demand for the part where solar energy is insufficient is distributed according to the weight coefficient α, and is adjusted in combination with the ratio of the battery power to the power available from the mains. The mains power supply is the total load demand minus the battery power share, so as to balance the energy supply of the two, taking into account both energy saving and battery life (no excessive discharge).

[0049] Furthermore, the second intelligent switch also includes an emergency power supply allocation module; The emergency power supply deployment module is executed according to the following steps: Special working condition 1: Insufficient solar energy and sudden increase in load at night When there is no solar energy at night ( ) or a sudden and significant increase in load ( When the power supply is unbalanced (exceeds the threshold), and the mains power is normal:

[0050]

[0051] Here, the battery shares part of the load power according to the weight coefficient β (subject to the maximum discharge power limit), and the mains makes up the rest to ensure emergency power supply and participate appropriately according to the battery status to avoid battery overload and respond quickly to load changes.

[0052] Special working condition 2: mains failure Single battery power supply when (Mains power failure judgment), the system switches to battery power supply alone:

[0053] Ensure that during a mains power failure, the battery supports the load with the safe maximum discharge power, and at the same time alert the monitoring end of mains power anomalies to ensure uninterrupted operation of critical loads until the mains power is restored or the battery is exhausted.

[0054] Special working condition 3: Strategy after mains power restoration Suppose the probability of unexpected power outage within the next preset time is , the time interval of unexpected power outage is , using the previously defined comprehensive evaluation indicators And corresponding , , Formulas and rules for selecting power supply methods.

[0055] If the first power supply mode is selected according to the rules (mains power and battery power supply at the same time and the mains power supply is increased to charge the battery):

[0056]

[0057] in The additional power supply from the mains is used to supplement the load and help charge the battery. It is dynamically adjusted according to the battery power and load to restore normal coordination and gradually charge the battery.

[0058] If you choose the second power supply method (mains power supply alone and solar power charging batteries): (The battery stops discharging and is charged by solar energy)

[0059] The mains electricity bears the entire load, and solar energy replenishes the batteries to cope with possible power outages.

[0060] If the third power supply method is selected (mains power supply alone and solar power charges the battery, and mains power also charges the battery):

[0061]

[0062] In addition, part of the AC power is allocated to charge the battery according to the safe charging strategy, thereby enhancing battery energy storage and coping with high power outage risks.

[0063] The second intelligent switch continuously monitors various variables, switches in real time according to the above formula logic, and accurately allocates the power supply of AC power and battery power, shuttling between multiple working conditions to ensure stable, efficient and intelligent power supply of the system, meeting the needs of complex power consumption scenarios and energy-saving and reliability goals.

[0064] Working principle of the present invention: When in use, the solar charging and power supply process: when there is sufficient sunlight during the day, the solar panel converts light energy into electrical energy output. After the solar controller performs intelligent control such as voltage regulation and overcharge protection, the stable and adaptive electrical energy is transmitted to the first input end of the first intelligent switch. The first intelligent switch plays the channel selection and control functions to guide solar electricity into the battery to realize the charging and storage process. During this period, it can flexibly control the charging process according to the battery power status (such as continuous charging when it detects that the power is not full, and adjusting the charging current when it is almost full). At the same time, the first input end of the second intelligent switch connected to the battery output end is ready for power supply. Once the load has demand, the battery can transmit power to the terminal through the second intelligent switch and the main control board to ensure the operation of the equipment.

[0065] Insufficient solar energy or nighttime power supply logic: When the amount of electricity generated by solar energy is difficult to meet the needs of the load (the load demand increases, the light becomes weaker, resulting in reduced power generation, or there is no light generation at night), the system automatically enables the mains as a supplementary power source. The mains is output from the power supply end, and the inverter first converts the AC power into DC power that is suitable for the load and battery charging, and then connects to the second input end of the second intelligent switch. At this time, the second intelligent switch finely adjusts the battery and mains supply based on preset strategies (such as giving priority to ensuring the stable operation of critical loads, allocating battery and mains power supply in proportion, etc.), allowing the two to work together to power the load, and the battery power is the main support, and the mains power is the auxiliary support to maintain the stable energy supply state of the system.

[0066] Fault emergency switching mechanism: In the face of a sudden power outage, the second intelligent switch can monitor the lack of AC input in real time, quickly cut off the AC power supply line, and seamlessly switch to an independent power supply mode where only the battery is used to supply power to the terminal, thereby ensuring the continuous operation of critical loads by relying on the battery reserve power. If the battery is damaged and cannot output power normally, the second intelligent switch will also be able to detect it sensitively and immediately cut off its power supply link and switch to a single AC power supply (if the AC power is normal), thereby responding to power failures, achieving uninterrupted power supply switching, and protecting the smooth operation of terminal equipment.

[0067] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0068] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-channel power switching power collection system, comprising a battery, a mains power supply terminal, a first intelligent switch and a second intelligent switch, characterized in that: It also includes a solar panel, the output end of the solar panel is electrically connected to a solar controller, the solar controller is electrically connected to a first input end of the first intelligent switch, the output end of the first intelligent switch is electrically connected to the battery, the output end of the battery is electrically connected to a first input end of the second intelligent switch, and the output end of the second intelligent switch is electrically connected to a terminal through a main control board; The first output end of the commercial power supply is electrically connected to the second input end of the second intelligent switch through an inverter.

2. A multi-channel power supply switching power collection system as claimed in claim 1, characterized in that: The main control board includes a first control unit, which is used for: when the amount of electricity generated by solar energy is not less than the amount of electricity required by the load, the solar panel generates electricity to charge the battery through the solar controller and the first intelligent switch, and at the same time the battery serves as a power source to supply power to the terminal through the second intelligent switch and the main control board, and the first output end of the AC power supply end is not powered.

3. A multi-channel power supply switching power collection system as claimed in claim 1, characterized in that: The main control board includes a second control unit, which is used to: when the amount of electricity generated by solar energy is less than the amount of electricity required by the load, the mains power supply end and the storage battery cooperate to supply power to the terminal load; The AC power is controlled to be output from the power supply end, and the AC power is first converted into DC power suitable for load and battery charging by the inverter, and then connected to the second input end of the second intelligent switch.

4. A multi-channel power supply switching power collection system as claimed in claim 1, characterized in that: The main control board includes a third control unit, which is used to: when the mains power is cut off or the battery is damaged, control the second intelligent switch to switch to a single power supply form. If the mains power is cut off, the battery will supply power to the terminal load alone; if the battery is damaged, the mains power supply will supply power to the terminal load alone after conversion by the inverter.

5. A multi-channel power switching power collection system as claimed in claim 1, characterized in that: The second output end of the mains power supply end is electrically connected to the second input end of the first intelligent switch through a charger, and is used to charge the battery through the mains power supply end.

6. A multi-channel power supply switching power collection system as claimed in claim 5, characterized in that: The main control board includes a fourth control unit, which is used to select a power supply mode after the mains power is restored: It is used to evaluate the power supply mode after the mains power is restored. Assume that the probability of unexpected power outage within the next preset time is , the time interval of unexpected power outage is , the remaining battery power is , the solar power supply capacity is ,in: For the first power supply mode, the evaluation value is , is the weight coefficient; For the second power supply mode, the evaluation value is , is the weight coefficient; For the third power supply mode, the evaluation value is , is the weight coefficient; And the power supply mode selection rule is: if and , then select the first power supply mode; if and , then choose the second power supply mode; if and , then select the third power supply method.

7. A multi-channel power switching power collection system as claimed in claim 6, characterized in that: The first intelligent switch includes a charging determination and power distribution module; The charging determination and power allocation module is executed according to the following steps: when and When the first intelligent switch starts the charging process; Calculate the power allocated to battery charging : ; in, Indicates at time The electrical power output of the solar panels; : represents the moment The remaining battery capacity; : The maximum charging power allowed by the battery; : The comprehensive energy conversion efficiency during the charging process from the solar panel through the first intelligent switch to the battery.

8. A multi-channel power supply switching power collection system as claimed in claim 7, characterized in that: The first intelligent switch also includes an auxiliary discharge determination and power limitation module; The auxiliary discharge determination and power limitation module is executed according to the following steps: Assume the load demand power is ,when and When the battery is discharged and replenished through the first intelligent switch; Calculate battery auxiliary discharge power : ； in, Indicates at time The electrical power output of the solar panels; : represents the moment The remaining battery capacity; : The maximum charging power allowed by the battery; : The minimum discharge power set for the battery; : The comprehensive energy conversion efficiency during the charging process from the solar panel through the first intelligent switch to the battery.

9. A multi-channel power supply switching power collection system as claimed in claim 6, characterized in that: The second intelligent switch includes a power supply distribution determination module and an emergency power supply allocation module; The power distribution determination module is executed according to the following steps: when Can support and In the preset range, solar energy is used to supply power through batteries; If solar energy is insufficient ( ) but the mains power is normal and Sufficient, enter the stage of coordinated power supply of mains and batteries, calculate the power supply of each: ； ； The second intelligent switch also includes: The emergency power supply deployment module is executed according to the following steps: when or When the threshold is exceeded and the original power supply is unbalanced, and the mains power is normal: ； ； when , the system switches to battery power supply alone: ； When the utility power is cut off and restored: If the first power supply method is selected according to the rules, then: ； ； in Provide additional power to the mains compared to before; If the second power supply method is selected, then: ； ； If the third power supply method is selected, then: ； ； in, : represents the moment The electrical power required by the terminal load; : represents at time The remaining battery capacity; : Indicates at time The electrical power output of the solar panels; :time The effective electric power that can be provided by the mains power supply and adapted by the inverter; : The maximum discharge power allowed by the battery; : The minimum effective power supply power set by the mains; α, β: weight coefficients.

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