Battery optimization management system for photovoltaic cleaning robot

Abstract

The utility model relates to the technical field of photovoltaic power generation system operation and maintenance, in particular to a battery optimization management system for a photovoltaic cleaning robot, which comprises a first voltage acquisition module electrically connected with a storage battery and used for acquiring the output voltage of the storage battery; the second voltage acquisition module is electrically connected with the solar panel and is used for acquiring the output voltage of the solar panel; the battery discharge control module is electrically connected with the storage battery and a main load; and a battery charging control module. The priority of the cleaning task of the cleaning robot is placed after the service life of the storage battery is guaranteed, it is firstly guaranteed that the storage battery discharges at the optimal charging power and the optimal discharging power, the service life of the storage battery is longer, meanwhile, the storage battery or a solar panel meeting the load power state can supply power to a main load, and the service life of the main load is prolonged. Frequent start and stop of a main load caused by unstable power generation of the solar panel are avoided, the operation cost of the system can be lower, and the maintenance cost can be lower.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power generation system operation and maintenance, in particular to a battery optimization management system for a photovoltaic cleaning robot. Background Art

[0002] The efficiency of photovoltaic power generation is closely related to the cleanliness of the surface of photovoltaic modules. The emergence of photovoltaic cleaning robots has greatly improved the cleanliness of the surface of photovoltaic modules, thereby ensuring the power generation efficiency of photovoltaic modules. At present, most photovoltaic cleaning robots are self-powered, that is, they have their own solar panels and batteries (secondary batteries). The solar panels charge the batteries, and the batteries are used to store energy and maintain the normal operation of the robots.

[0003] Since the charging and discharging process of the battery has a very large impact on the life of the battery, a battery charging and discharging management module is needed to manage the charging and discharging process of the battery to maximize the characteristics of the battery and increase the service life of the battery.

[0004] The photovoltaic robot battery charge and discharge management module currently used is usually provided with input by solar panels, and the load is powered through the DC-DC module and the constant current and constant voltage control module, while charging the battery. A common problem with this module is that when the current provided by the solar panel cannot meet the current battery charging requirements, the battery cannot be charged in the optimal state, thus affecting the battery life. For example, when charging the battery, when the power output provided by the solar energy cannot meet the battery's optimal charging current and voltage requirements, if the power output changes frequently, the battery cannot be charged in the optimal state, which has a serious impact on the battery life.

[0005] In addition, in the traditional power supply management module, when the power output provided by solar energy cannot meet the load (motor drive and cleaning work) requirements, if it is still powered by solar energy, frequent startup and shutdown will occur, affecting work efficiency and machine life. Utility Model Content

[0006] The utility model aims to solve the above problems. In the first aspect, the utility model proposes a technical solution, a battery optimization management system for a photovoltaic cleaning robot, comprising:

[0007] include:

[0008] A first voltage acquisition module electrically connected to the battery, used to acquire the output voltage of the battery;

[0009] A second voltage collection module electrically connected to the solar panel, used to collect the output voltage of the solar panel;

[0010] A battery discharge control module, electrically connected to the battery and the main load;

[0011] The battery charging control module is connected to the solar panel via the DC-DC module. The power output by the solar panel passes through the DC-DC module and then charges the battery via the battery charging control module.

[0012] A start control module is electrically connected to the solar panel to control the power output of the solar panel;

[0013] It also includes a main control chip, which is electrically connected to the first voltage acquisition module, the second voltage acquisition module, the battery discharge control module, the battery charging control module and the start control module, and controls whether to start the control module to enable the solar panel to output power to the outside and charge the battery.

[0014] Preferably, the main control chip has a built-in solar panel power-voltage matching unit and a battery charging and discharging power-voltage electrical matching unit.

[0015] Preferably, the solar panel power-voltage matching unit generates a specific first voltage-power curve according to power characteristics of the solar panel output at different voltages, and each voltage value corresponds to an output power threshold.

[0016] Preferably, the battery charging and discharging power-voltage electrical matching unit generates a specific second voltage-power curve according to the optimal charging power and discharging power characteristics corresponding to the battery at different voltages, and each voltage value corresponds to a charging power threshold and a discharging power threshold.

[0017] Preferably, when the minimum value of the output power of the solar panel at a certain voltage is greater than the minimum value of the charging power of the battery at the current voltage, the solar panel outputs power to the outside to charge the battery.

[0018] Preferably, the battery includes a first voltage interval, a second voltage interval and a third voltage interval, wherein a charging power threshold range in the second voltage interval is greater than a charging power threshold range in the first voltage interval and the third voltage interval.

[0019] Preferably, within the first voltage interval, the battery charging control module maintains a first current value to charge the battery, within the second voltage interval, the battery charging control module maintains a second current value to charge the battery, and within the third voltage interval, the battery charging control module maintains a first voltage value to charge the battery.

[0020] Preferably, when the rated power of the main load is greater than the maximum discharge power of the battery at the current voltage, the main control chip controls the battery discharge control module to disconnect the discharge circuit of the battery.

[0021] Preferably, the battery discharge control module is used to detect the current value of the battery discharge circuit. When the current value of the battery discharge circuit exceeds a preset value, the battery discharge control module disconnects the battery discharge circuit.

[0022] Preferably, when the discharge circuit of the battery is disconnected, the main control chip records the current operating power of the main load as the first power, and the second voltage acquisition module acquires the output power of the solar panel under the current voltage. If it is greater than the first power, the solar panel will supply power to the main load via the DC-DC module at the next startup; otherwise, at the next startup, the operating power of the main load is controlled to be less than the first power, and the battery continues to supply power to the main load.

[0023] Compared with the prior art, the beneficial effects of this application are:

[0024] This application puts the priority of the cleaning task of the cleaning robot after ensuring the service life of the battery. First, it ensures that the battery is discharged with the optimal charging power and the optimal discharging power to extend the service life of the battery. At the same time, the main load can be powered by the battery or the solar panel that meets the load power state to avoid the frequent start and stop of the main load caused by the unstable power generation of the solar panel, which can reduce the cost of system operation and maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are not intended to be drawn to scale. In the accompanying drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For the sake of clarity, not every component is labeled in each figure. Now, embodiments of various aspects of the utility model will be described by way of example and with reference to the accompanying drawings, in which:

[0026] Figure 1 It is a structural schematic diagram of a battery optimization management system for a photovoltaic cleaning robot shown in the utility model. DETAILED DESCRIPTION

[0027] In order to better understand the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.

[0028] Combination Figure 1 As shown, the first aspect of the utility model proposes a technical solution, a battery optimization management system for a photovoltaic cleaning robot, including a first voltage acquisition module 60, a second voltage acquisition module 50, a battery discharge control module 30, a battery charging control module 20, a start control module 70 and a main control chip 40.

[0029] The first voltage collection module 60 is electrically connected to the battery 300 for collecting the output voltage of the battery 300 , and the second voltage collection module 50 is electrically connected to the solar panel 100 for collecting the output voltage of the solar panel 100 .

[0030] In this way, by monitoring the voltage across the solar panel 100 and the battery 300, the output power of the solar panel 100 at the current voltage and the optimal output power and charging power of the battery 300 at the current voltage can be determined, which is beneficial for matching the appropriate charging and discharging timing for the battery 300 to ensure the service life of the battery 300.

[0031] The battery discharge control module 30 is electrically connected to the battery 300 and the main load 200 .

[0032] In this way, the battery 300-battery discharge control module 30-main load 200 constitute a discharge circuit. When the battery 300 supplies power to the main load 200, the discharge circuit of the battery 300 can be controlled by the battery discharge control module 30. Once overcurrent or low voltage occurs, the discharge circuit is disconnected, which can effectively protect the battery and avoid battery overheating or excessive discharge.

[0033] The battery charging control module 20 is connected to the solar panel 100 via the DC-DC module 10 . The power output by the solar panel 100 passes through the DC-DC module 10 and then charges the storage battery 300 via the battery charging control module 20 .

[0034] In this way, the solar panel 100-DC-DC module 10-battery charging control module 20-battery 300 constitute a charging circuit. The DC-DC module 10 can convert the direct current generated by the solar panel 100 into the voltage level required by the battery 300, and the battery charging control module 20 can monitor the current charging current and electric power. When overcurrent occurs or the charging power is not in compliance, the charging circuit is cut off to avoid the charging process from causing adverse effects on the battery 300.

[0035] Combination Figure 1 As shown, the start control module 70 is electrically connected to the solar panel 100 to control the power output of the solar panel 100. The main control chip 40 is electrically connected to the first voltage acquisition module 60, the second voltage acquisition module 50, the battery discharge control module 30, the battery charge control module 20 and the start control module 70.

[0036] Furthermore, the main control chip 40 has a built-in solar panel power-voltage matching unit and a battery charging and discharging power-voltage electrical matching unit, and determines the current optimal charging power according to the output voltage of the battery 300 and determines the current output power of the solar panel 100 according to the output voltage of the solar panel 100 through a calculation unit, and controls the start control module 70 to make the solar panel 100 output power to the outside and charge the battery 300 when the current output power of the solar panel 100 is greater than the current optimal charging power, otherwise the power output for charging the battery 300 is cut off.

[0037] The solar panel power-voltage matching unit generates a specific first voltage-power curve according to the power characteristics of the solar panel 100 output at different voltages, and each voltage value corresponds to an output power threshold.

[0038] The battery charging and discharging power-voltage electrical matching unit generates a specific second voltage-power curve according to the optimal charging power and discharging power characteristics of the battery 300 at different voltages, and each voltage value corresponds to a charging power threshold and a discharging power threshold.

[0039] It should be understood that the first voltage-power curve of each solar panel 100 is related to the properties of the solar panel itself and can be obtained through measurement before leaving the factory. The second voltage-power curve of each battery 300 is also related to the properties of the battery itself and can also be obtained through measurement before leaving the factory. It is only necessary to store the voltage-power curve corresponding to the different types of solar panels 100 or batteries 300 in the main control chip 40 in advance. The main control chip 40 can give a corresponding power value according to each voltage value.

[0040] In this way, by continuously monitoring the voltage output by the solar panel 100, and then according to the first voltage-power curve corresponding to the solar panel 100 model, the power range output by the solar panel 100 under the current voltage is obtained. At the same time, the voltage of the battery 300 is monitored to obtain the optimal charging power of the battery 300 under the current voltage. When the electric power output by the solar panel 100 under the current lighting conditions matches the optimal charging power of the battery 300 under the current voltage, the battery 300 can be charged. This charging process can protect the battery so that its performance / life is not impaired due to too low or too high power during the charging process, thereby maximizing the battery life.

[0041] It should be understood that due to changes in lighting conditions, the electric power output by the solar panel 100 is constantly changing. If such changing power that is not within the optimal charging range of the battery is used to charge the battery for a long time, it is easy to cause a decrease in the battery life. In a preferred embodiment, when the minimum value of the output power of the solar panel 100 at a certain voltage is greater than the minimum value of the charging power of the battery 300 at the current voltage, the solar panel 100 outputs power to charge the battery 300.

[0042] Therefore, only when the electric power generated by the solar panel 100 is sufficient to meet the minimum value of the current optimal charging power of the battery 300, the start control module 70 enables the solar panel 100 to charge the battery 300 to ensure that the battery 300 is charged with the optimal charging power during the entire charging process.

[0043] In an optional embodiment, taking the battery 300 as a lithium battery, since high-current charging of a lithium battery under overvoltage and undervoltage conditions can easily cause the battery life to decrease, the battery 300 is set to include a first voltage interval, a second voltage interval, and a third voltage interval, wherein the charging power threshold range within the second voltage interval is greater than the charging power threshold range of the first voltage interval and the third voltage interval.

[0044] Specifically, in the first voltage interval, the battery charging control module 20 maintains a first current value to charge the battery 300, in the second voltage interval, the battery charging control module 20 maintains a second current value to charge the battery 300, and in the third voltage interval, the battery charging control module 20 maintains the first voltage value to charge the battery 300. The second current value is greater than the first current value, and in the first voltage interval, as the battery voltage increases, the charging power gradually increases, and in the second voltage interval, the charging power further gradually increases, until in the third voltage interval, in order to avoid overcurrent, a constant voltage charging method is adopted, and the power gradually decreases.

[0045] During the discharge process, when the rated power of the main load 200 is greater than the maximum value of the discharge power of the battery 300 at the current voltage, the main control chip 40 controls the battery discharge control module 30 to disconnect the discharge circuit of the battery 300. Further, the battery discharge control module 30 is used to detect the current value of the discharge circuit of the battery 300. When the current value of the discharge circuit of the battery 300 exceeds a preset value, the battery discharge control module 30 disconnects the discharge circuit of the battery 300.

[0046] In this way, by monitoring the discharge current and the discharge power corresponding to the current voltage, overcurrent can be effectively avoided during the discharge process of the battery to protect the battery during discharge.

[0047] Furthermore, when the discharge circuit of the battery 300 is disconnected, the main control chip 40 records the current operating power of the main load 200 as the first power, and the second voltage collection module 50 collects the output power of the solar panel 100 under the current voltage. If it is greater than the first power, the solar panel 100 supplies power to the main load 200 via the DC-DC module 10 at the next startup. Otherwise, at the next startup, the operating power of the main load 200 is controlled to be less than the first power, and the battery 300 continues to supply power to the main load 200.

[0048] In an optional embodiment, when the current voltage of the battery 300 does not meet the operating power of the main load 200 and the solar panel 100 does not meet the operating power of the main load 200, the solar panel 100 preferentially charges the battery 300 according to a predetermined charging logic to maintain the main load 200 to operate for a long time at one time.

[0049] In this way, the storage battery 300 can be protected to avoid excessive power generation when the storage battery 300 is discharged, and the main load 200 can be prevented from being frequently started and stopped when powered by the solar panel 100.

[0050]

Battery charging and discharging management method for photovoltaic cleaning robots

[0051] The second aspect of the utility model proposes a technical solution, a battery charging and discharging management method for a photovoltaic cleaning robot, using the above-mentioned battery optimization management system for the photovoltaic cleaning robot, including a charging method and a discharging method:

[0052] The charging method comprises the following steps:

[0053] Step a1, continuously collecting the output voltage of the solar panel 100 and the battery 300;

[0054] Step a2, determining the current optimal charging power according to the output voltage of the battery 300 and determining the current output power of the solar panel 100 according to the output voltage of the solar panel 100;

[0055] Step a3: When the current output power of the solar panel 100 is greater than the current optimal charging power of the battery 300, the solar panel 100 is controlled to output power to the outside and charge the battery 300; otherwise, the power output for charging the battery 300 is cut off;

[0056] The discharge method comprises the following steps:

[0057] Step b1, continuously collecting the output voltage of the solar panel 100 and the battery 300;

[0058] Step b2: When the electric power generated by the solar panel 100 does not meet the power demand of the main load 200 or the power module, the battery 300 supplies power to each power module, and automatically disconnects the discharge circuit when the voltage of the battery 300 drops to a set value or the discharge current is higher than a set value.

[0059] It can be understood that by monitoring the voltage of the solar panel 100 and the battery 300, and calculating the electric power generated by the solar panel 100 and the optimal charging power of the battery 300 under the current voltage according to the voltage-power curve specifically determined by the solar panel and the battery themselves, the solar panel 100 is controlled to output power and charge the battery 300 only when the current output power of the solar panel 100 is greater than the current optimal charging power of the battery 300, otherwise the power output for charging the battery 300 is cut off. This method avoids the undesirable charging method of the solar panel 100 charging the battery 300 under low voltage state, so that the battery 300 maintains the optimal charging power throughout the entire charging cycle.

[0060] At the same time, during the charging and discharging process, the charging / discharging current and charging power of the battery 300 are detected, and when the current or charging power is greater than the current value or power value corresponding to the current voltage of the battery 300, the charging circuit or the discharging circuit is disconnected. In this way, it can further ensure that the battery 300 avoids over-discharging and over-charging during the charging and discharging process.

[0061] In combination with the above embodiments, the present application places the priority of the cleaning task of the cleaning robot after ensuring the service life of the battery. First, it ensures that the battery is discharged with the optimal charging power and the optimal discharging power to extend the service life of the battery. At the same time, the main load can be powered by the battery or the solar panel that meets the load power state to avoid frequent starting and stopping of the main load caused by unstable power generation of solar panels, which can reduce the cost of system operation and maintenance costs.

[0062] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A battery optimization management system for a photovoltaic cleaning robot, characterized in that: include: A first voltage acquisition module (60) electrically connected to the storage battery (300) and used to acquire the output voltage of the storage battery (300); A second voltage collection module (50) electrically connected to the solar panel (100) and used to collect the output voltage of the solar panel (100); A battery discharge control module (30) electrically connected to the storage battery (300) and the main load (200); A battery charging control module (20) is connected to the solar panel (100) via the DC-DC module (10); the power output by the solar panel (100) passes through the DC-DC module (10) and then charges the storage battery (300) via the battery charging control module (20); A start-up control module (70) is electrically connected to the solar panel (100) and is used to control the power outputted by the solar panel (100); The invention further comprises a main control chip (40), which is electrically connected to the first voltage acquisition module (60), the second voltage acquisition module (50), the battery discharge control module (30), the battery charging control module (20) and the start control module (70), and controls whether to start the control module (70) so that the solar panel (100) outputs power to the outside and charges the storage battery (300).

2. The battery optimization management system for the photovoltaic cleaning robot according to claim 1, characterized in that: The storage battery (300) comprises a first voltage interval, a second voltage interval and a third voltage interval, wherein a charging power threshold range in the second voltage interval is greater than a charging power threshold range in the first voltage interval and the third voltage interval.

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