CN112952963A - Solar control circuit - Google Patents

Solar control circuit Download PDF

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Publication number
CN112952963A
CN112952963A CN202110400121.5A CN202110400121A CN112952963A CN 112952963 A CN112952963 A CN 112952963A CN 202110400121 A CN202110400121 A CN 202110400121A CN 112952963 A CN112952963 A CN 112952963A
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CN
China
Prior art keywords
battery pack
circuit
charging
control circuit
electrically connected
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Pending
Application number
CN202110400121.5A
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Chinese (zh)
Inventor
刘志伟
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Hangzhou Hikvision Digital Technology Co Ltd
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Hangzhou Hikvision Digital Technology Co Ltd
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Priority to CN202110400121.5A priority Critical patent/CN112952963A/en
Publication of CN112952963A publication Critical patent/CN112952963A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The solar control circuit comprises a solar input interface, a battery pack interface, a charging circuit, a charging control circuit and a controller, wherein the solar input interface is used for being electrically connected with a photovoltaic panel; the controller is electrically connected with the charging circuit and the charging control circuit, is used for controlling the charging circuit, and is used for controlling the charging control circuit when the temperature of the first battery pack is within the charging temperature range of the first battery pack, so that the electric energy output by the charging circuit charges the first battery pack, and is used for controlling the charging control circuit when the temperature of the first battery pack is out of the charging temperature range, so that the electric energy output by the charging circuit charges the second battery pack. Charging efficiency can be improved, and the service life and stability of the whole power supply system are prolonged.

Description

Solar control circuit
Technical Field
The application relates to the technical field of electronics, especially, relate to a solar control circuit.
Background
The solar controller is internally provided with a solar control circuit, is used in a solar power generation system, is a control circuit for controlling a multi-path solar cell matrix to charge a storage battery and the storage battery to supply power to a solar inverter load, and is a core control part of the whole photovoltaic power supply system. In the process of practical application, the solar control circuit is connected with the single-circuit battery pack, so that the charging efficiency is not high, and the service life and the stability of the whole power supply system are influenced.
Disclosure of Invention
The application provides a solar control circuit for improving charging efficiency.
The application provides a solar control circuit, includes:
the solar energy input interface is used for electrically connecting the photovoltaic panel;
the battery pack interface comprises a first battery pack interface and a second battery pack interface, the first battery pack interface is used for being electrically connected with a first battery pack, and the second battery pack interface is used for being electrically connected with a second battery pack;
the input end of the charging circuit is electrically connected with the solar input interface, and the output end of the charging circuit is electrically connected with the battery pack interface;
the charging control circuit is electrically connected between the charging circuit and the battery pack interface; and
the controller is electrically connected with the charging circuit and the charging control circuit, the controller is used for controlling the charging circuit, the controller is used for controlling the temperature of the first battery pack within the charging temperature range, the charging control circuit is controlled to enable the electric energy output by the charging circuit to charge the first battery pack, the temperature of the first battery pack is controlled when the charging temperature range is out, the charging control circuit is controlled to enable the electric energy output by the charging circuit to charge the second battery pack.
The photovoltaic board, first group battery and second group battery are connected to the solar control circuit electricity of this application embodiment, and its controller makes the photovoltaic board charge for first group battery and second group battery under different temperatures through control charging circuit, charging control circuit, promotes charge efficiency, prolongs whole power supply system's life and stability.
Drawings
FIG. 1 is a schematic block circuit diagram of one embodiment of a solar control circuit of the present application;
FIG. 2 is a functional block diagram of a controller of the solar control circuit of the present application;
FIG. 3 is a circuit diagram of a charging circuit of the solar control circuit of the present application;
fig. 4 is a partial circuit diagram of a charge control circuit of the solar control circuit of the present application;
FIG. 5 is a circuit diagram of a temperature sensing circuit of the solar control circuit of the present application;
FIG. 6 is a circuit diagram of a heating control circuit of the solar control circuit of the present application;
FIG. 7 is a circuit diagram of a battery pack voltage acquisition circuit, a current acquisition circuit, a first anti-reverse connection circuit of the solar control circuit of the present application;
FIG. 8 is a circuit diagram of a second anti-reverse connection circuit of the solar control circuit of the present application;
FIG. 9 is a circuit diagram of an input voltage acquisition circuit of the solar control circuit of the present application;
FIG. 10 is a circuit diagram of the power supply circuit of the solar control circuit of the present application;
fig. 11 is a circuit diagram of a power conversion circuit of the solar control circuit of the present application;
fig. 12 is a circuit diagram of a load switching circuit of the solar control circuit of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means at least two. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
The application provides a solar control circuit for improving charging efficiency.
The solar control circuit comprises a solar input interface, a battery pack interface, a charging circuit, a charging control circuit and a controller, wherein the solar input interface is used for being electrically connected with a photovoltaic panel; the controller is electrically connected with the charging circuit and the charging control circuit, is used for controlling the charging circuit, and is used for controlling the charging control circuit when the temperature of the first battery pack is within the charging temperature range of the first battery pack, so that the electric energy output by the charging circuit charges the first battery pack, and is used for controlling the charging control circuit when the temperature of the first battery pack is out of the charging temperature range, so that the electric energy output by the charging circuit charges the second battery pack.
The solar control circuit of this application embodiment, electricity connection photovoltaic board, first group battery and second group battery, its controller makes the photovoltaic board charge for first group battery and second group battery under different temperatures through control charging circuit, charging control circuit, promotes charge efficiency to prolong whole power supply system's life and stability.
Referring to fig. 1 to 12, the solar control circuit 10 includes a solar input interface 11, a battery pack interface 12, a charging circuit 13, a charging control circuit 14, and a controller 15. In some embodiments, solar input interface 11 is used to electrically connect photovoltaic panel 100. In some embodiments, the solar input interface 11 includes a solar input interface positive pole PV + and a solar input interface negative pole PV- (as shown in fig. 8). In the present embodiment, the photovoltaic panel 100 is connected to the solar control circuit 10 via the solar input interface positive electrode PV + and the solar input interface negative electrode PV-. In some embodiments, photovoltaic panel 100 is a power generation device that generates direct current upon exposure to sunlight, and is comprised of thin solid photovoltaic cells made of semiconductor material (silicon).
In some embodiments, the battery pack interface 12 includes a first battery pack interface 121 and a second battery pack interface 122, the first battery pack interface 121 being configured to electrically connect the first battery pack 200, and the second battery pack interface 122 being configured to electrically connect the second battery pack 300. In some embodiments, the first battery pack interface 121 includes a first battery pack interface positive electrode BAT1+ and a first battery pack interface negative electrode BAT1-, and the first battery pack 200 is electrically connected between the first battery pack interface positive electrode BAT1+ and the first battery pack interface negative electrode BAT 1-. In some embodiments, the second battery pack interface 122 includes a second battery pack interface positive electrode BAT2+ and a second battery pack interface negative electrode BAT2-, and the second battery pack 300 is electrically connected between the second battery pack interface positive electrode BAT2+ and the second battery pack interface negative electrode BAT 2-.
In some embodiments, an input terminal of the charging circuit 13 is electrically connected to the solar input interface 11, an output terminal of the charging circuit 13 is electrically connected to the battery pack interface 12, and the charging control circuit 14 is electrically connected between the charging circuit 13 and the battery pack interface 12, so as to control the charging control circuit 14 to switch on/off the charging circuit 13 and the first battery pack interface 121 or the second battery pack interface 122. In some embodiments, the controller 15 is electrically connected to the charging circuit 13 and the charging control circuit 14, the controller 15 is configured to control the charging circuit 13, and the controller 15 is configured to control the charging control circuit 14 to enable the electric energy output by the charging circuit 13 to charge the first battery pack 200 when the temperature of the first battery pack 200 is within the charging temperature range thereof, and to control the charging control circuit 14 to enable the electric energy output by the charging circuit 13 to charge the second battery pack 300 when the temperature of the first battery pack 200 is outside the charging temperature range.
In some embodiments, when the first battery pack 200 is in the charging temperature range, the controller 15 controls the charging circuit 13 and the charging control circuit 14 to be conducted, so that the charging circuit 13 is communicated with the first battery pack 200, and the first battery pack 200 can be charged in time. In this process, when the second battery pack 300 does not need to be charged, the controller 15 controls the charging circuit 13 and the charging control circuit 14 to disconnect the charging circuit 13 from the second battery pack 300, so that power consumption can be reduced, and the current of the second battery pack 300 is prevented from reversely flowing into the controller 15, thereby preventing the controller 15 from being damaged.
In some embodiments, when the first battery pack 200 is outside the charging temperature range, the controller 15 controls the charging circuit 13 and the charging control circuit 14 to communicate the charging circuit 13 with the second battery pack 300, so as to charge the second battery pack 300 in time. In this process, when the first battery pack 200 does not need to be charged, the controller 15 controls the charging circuit 13 and the charging control circuit 14 to disconnect the charging circuit 13 from the first battery pack 200, so that power consumption can be reduced, and the current of the first battery pack 200 is prevented from reversely flowing into the controller 15, thereby preventing the controller 15 from being damaged.
Through photovoltaic board 100 with solar energy transformation electric energy, in solar control circuit 10 is inputed to through solar energy input interface 11, solar control circuit 10 is through control charging circuit 13, charging control circuit 14, makes photovoltaic board 100 charge for first group battery 200 or second group battery 300 under the different temperatures, can effectively utilize solar energy, energy-concerving and environment-protective, with low costs, and can promote charge efficiency, prolong whole power supply system's life and stability.
According to the battery properties of first battery pack 200 and second battery pack 300, the charging temperature range of second battery pack 300 is greater than the charging temperature range of first battery pack 200. In some embodiments, first battery pack 200 may be a ternary lithium battery that may be charged when ambient temperature is between 0-45 degrees, depending on the battery properties of the ternary lithium battery. In this embodiment, when the ambient temperature of the ternary lithium battery is 0-45 degrees, the controller 15 controls the charging control circuit 14 to charge the ternary lithium battery with the electric energy output by the charging circuit 13, so that the ternary lithium battery is normally charged. In some embodiments, second battery pack 300 includes a lithium titanate battery that can be charged when ambient temperature is between-35 degrees and 70 degrees, depending on the battery properties of the lithium titanate battery. When the ambient temperature is outside the range of 0-45 degrees, the controller 15 controls the charging control circuit 14 to charge the second battery pack 300 with the electric energy output by the charging circuit 13, so that the lithium titanate battery is normally charged. Through using ternary lithium cell and lithium titanate battery, both can satisfy the low temperature function of charging, possess the high characteristic of whole group battery energy density again to promote charging efficiency, prolong whole power supply system's life and stability.
In some embodiments, the energy density of the first battery pack 200 is greater than the energy density of the second battery pack 300, wherein the energy density is used to measure the amount of electricity stored in the battery packs. The energy density of second battery pack 300 is lower than that of first battery pack 200, but second battery pack 300 has low-temperature charge and discharge characteristics. By using the first battery pack 200 and the second battery pack 300, the low-temperature charging function can be satisfied, and the characteristic of high energy density of the whole battery pack is also provided, so that the charging efficiency is improved, and the service life and the stability of the whole power supply system are prolonged.
As shown in fig. 1 to 3, the charging circuit 13 includes a driving chip U1, a first switching tube Q1, and a second switching tube Q2. The driver chip U1 includes a first input terminal HIN, a second input terminal LIN, a first driver output terminal HO, and a second driver output terminal LO, the first switch tube Q1 electrically connects the first driver output terminal HO to the solar input interface 11, and the second switch tube Q2 electrically connects the second driver output terminal LO to the ground.
The controller 15 includes a first control port HIN electrically connected to the first input terminal HIN and a second control port LIN electrically connected to the second driving output terminal LO, and the controller 15 outputs PWM (Pulse Width Modulation) signals to the first input terminal HIN and the second input terminal LIN through the first control port HIN and the second control port LIN, respectively, to drive the first switching tube Q1 or the second switching tube Q2 to be alternately turned on or off, so that the photovoltaic panel 100 is communicated with the first battery pack 200 or the second battery pack 300. When the first control port HIN of the controller 15 outputs the first PWM signal to the first input terminal HIN of the driving chip U1, at this time, the first driving output terminal HO drives the first switch Q1 to be conducted, so that the photovoltaic panel 100 and the first battery pack 200 are conducted to supply power to the first battery pack 200. When the second control port LIN of the controller 15 outputs the second PWM signal to the second input terminal LIN of the driver chip U1, at this time, the second driver output terminal LO drives the second switch Q2 to be turned on, so that the photovoltaic panel 100 and the second battery pack 300 are turned on to supply power to the second battery pack 300.
In some embodiments, the driver chip U1 may be a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) half-bridge driver chip with high driving capability and high reliability. In some embodiments, the driving chip U1 further includes power supply terminals VB, VS electrically connected to the power conversion circuit 25, and the power conversion circuit 25 can provide a 12V power supply voltage to the driving chip U1.
As shown in fig. 1 to 4, the charging control circuit 14 includes a first charging control circuit 141 and a second charging control circuit 142, the first charging control circuit 141 electrically connects the controller 15 with the first battery pack interface positive electrode BAT1+ of the first battery pack interface 121, and the controller 15 controls the first charging control circuit 141 to communicate the charging circuit 13 with the first battery pack 200 to charge the first battery pack 200; the second charge control circuit 142 is electrically connected to the controller 15 and the second battery pack interface positive electrode BAT2+ of the second battery pack interface 122, and the controller 15 controls the second charge control circuit 142 to communicate the charge circuit 13 with the second battery pack 300 to charge the first battery pack 200.
In some embodiments, the first charge control circuit 141 includes a first transistor Q3 and a third transistor Q4, the controller 15 includes a third control port BEN1, the first transistor Q3 is electrically connected to the third control port BEN1 of the controller 15, the third transistor Q4 is electrically connected to the output CHG of the charging circuit 13, and the controller 15 controls the on/off of the first transistor Q3 through the third control port BEN1 to control the on/off of the third transistor Q4. In some embodiments, when the temperature of the first battery pack 200 is in the range of 0-45 degrees, the controller 15 controls the first transistor Q3 to be turned on through the third control port BEN1 to control the third transistor Q4 to be turned on, so that the charging circuit 13 is turned on with the first battery pack 200 to charge the first battery pack 200. When the first battery pack 200 is fully charged, the controller 15 controls the first transistor Q3 to turn off through the third control port BEN1, so as to control the third transistor Q4 to turn off, thereby disconnecting the charging circuit 13 from the first battery pack 200 and stopping charging the first battery pack 200.
In some embodiments, the second charge control circuit 142 includes a second transistor Q5 and a fourth switch Q6, the controller 15 includes a fourth control port BEN2, the second transistor Q5 is electrically connected to the fourth control port BEN2 of the controller 15, the fourth switch Q6 is electrically connected to the output CHG of the charging circuit 13, and the controller 15 controls the on/off of the second transistor Q5 through the fourth control port BEN2 to control the on/off of the fourth switch Q6. In some embodiments, when the temperature of the first battery pack 200 is out of the range of 0-45 degrees, the controller 15 controls the second transistor Q5 to be turned on through the fourth control port BEN2 to control the fourth transistor Q6 to be turned on, so that the charging circuit 13 is turned on with the second battery pack 300 to charge the second battery pack 300. When the second battery pack 300 is fully charged, the controller 15 controls the second transistor Q5 to turn off through the fourth control port BEN2, so as to control the fourth switch transistor Q6 to turn off, thereby disconnecting the charging circuit 13 from the second battery pack 300 and stopping charging the second battery pack 300.
Through setting up first control circuit 141 and the second control circuit 142 that charges, can realize the switching of charging of first group battery 200 and second group battery 300, guarantee that first group battery 200 and second group battery 300 effectively charge to promote charging efficiency, prolong whole power supply system's life and stability.
As shown in fig. 1 to 12, the solar control circuit 10 further includes a first temperature sensor 16, a second temperature sensor 17, a heating control circuit 18, a battery pack voltage collecting circuit 19, a current collecting circuit 20, a first anti-reverse connection circuit 21, a second anti-reverse connection circuit 22, an input voltage collecting circuit 23, a power supply circuit 24, a power conversion circuit 25, and a load switching circuit 26.
In some embodiments, the first temperature sensor 16 is configured to sense a temperature of the first battery pack 200 and generate a corresponding first electrical signal; the controller 15 is electrically connected to the first temperature sensor 16, and the controller 15 is configured to detect a first electrical signal output by the first temperature sensor 16, and control the charging control circuit 14 according to the first electrical signal, so that the electric energy output by the charging circuit 13 charges the first battery pack 200 or the second battery pack 300. In some embodiments, a first temperature sensor 16 may be disposed within first battery pack 200. In other embodiments, first temperature sensor 16 may be located proximate to first battery pack 200. The temperature sensed by the first temperature sensor 16 refers to the temperature of the environment in which the first battery pack 200 is located.
In some embodiments, the second temperature sensor 17 is used for sensing the temperature of the second battery pack 300 and generating a corresponding second electric signal; the controller 15 is electrically connected to the second temperature sensor 17, and the controller 15 is configured to detect a second electrical signal output by the second temperature sensor 17, and control the charging control circuit 14 according to the second electrical signal, so that the electric energy output by the charging circuit 13 charges the second battery pack 300 or the first battery pack 200. In some embodiments, a second temperature sensor 17 may be provided within the second battery pack 300. In other embodiments, a second temperature sensor 17 may be located near the second battery pack 300. The temperature sensed by the second temperature sensor 17 refers to the temperature of the environment in which the second battery pack 300 is located.
As shown in fig. 1, fig. 2 and fig. 5, the solar control circuit 10 further includes a temperature detection circuit 27, the temperature detection circuit 27 includes a first temperature detection circuit 271 and a second temperature detection circuit 272, the first temperature detection circuit 271 is electrically connected between the controller 15 and the power supply circuit 24 for detecting the temperature of the first battery pack 200, and the second temperature detection circuit 272 is electrically connected between the controller 15 and the power supply circuit 24 for detecting the temperature of the second battery pack 300. In this process, the power supply circuit 24 supplies a voltage of 3.3V to the first temperature detection circuit 271 and the second temperature detection circuit 272 to ensure that the first temperature sensor 16 and the second temperature sensor 17 can operate normally. For the specific circuits and implementation of the power supply circuit 24, please refer to the description below.
In some embodiments, the first temperature detection circuit 271 includes a first resistor R1 and a first temperature sensor 16, the first temperature detection circuit 271 includes a first voltage-dividing node M1, the first resistor R1 is electrically connected between the power supply circuit 24 and the first voltage-dividing node M1, and the first temperature sensor 16 is electrically connected between the first voltage-dividing node M1 and ground. The controller 15 includes a first sensing port TEMP1 electrically connected to the first voltage dividing node M1, and the controller 15 senses a first electrical signal after voltage division of the first temperature sensor 16 and the first resistor R1 through the first sensing port TEMP1 and controls the charging control circuit 14 according to the first electrical signal, so that the first battery pack 200 is charged by the electrical energy output from the charging circuit 13. When the electric signal indicates that the temperature of the first battery pack 200 is within the range of 0-45 degrees, the controller 15 controls the charging circuit 13 and the charging control circuit 14 to be conducted, so that the charging circuit 13 is communicated with the first battery pack 200 to charge the first battery pack 200. When the first electric signal indicates that the temperature of the first battery pack 200 is out of the range of 0-45 degrees, the controller 15 controls the charging circuit 13 and the charging control circuit 14 to be conducted, so that the charging circuit 13 is communicated with the second battery pack 300 to charge the second battery pack 300. Due to the circuit arrangement, solar energy can be effectively utilized to charge the first battery pack 200 and the second battery pack 300 uninterruptedly, and the charging efficiency is improved.
In this embodiment, the controller 15 includes a fifth control port EN _ TEMP1, the first temperature detection circuit 271 further includes a third transistor Q7, the third transistor Q7 is electrically connected to the fifth control port EN _ TEMP1 of the controller 15 and the first temperature sensor 16, and the controller 15 controls the on/off of the third transistor Q7 through the fifth control port EN _ TEMP1 to control the on/off of the first temperature sensor 16 and the power supply circuit 24. In some embodiments, when the temperature of the first battery pack 200 needs to be detected, the controller 15 controls the third transistor Q7 to be turned on through the fifth control port EN _ TEMP1, and controls the first temperature sensor 16 to communicate with the power supply circuit 24, so that the first temperature detection circuit 271 operates normally. When the temperature of the first battery pack 200 does not need to be detected, the controller 15 controls the third transistor Q7 to be turned off through the fifth control port EN _ TEMP1, and controls the first temperature sensor 16 to be disconnected from the power supply circuit 24, so that the first temperature detection circuit 271 stops working, thereby preventing the controller 15 from being always connected with the power supply circuit 24 and reducing power consumption.
In some embodiments, the second temperature detecting circuit 272 includes a second resistor R2 and a second temperature sensor 17, the second temperature detecting circuit 272 includes a second voltage dividing node M2, the second resistor R2 is electrically connected between the power supply circuit 24 and the second voltage dividing node M2, and the second temperature sensor 17 is electrically connected between the second voltage dividing node M2 and the ground. The controller 15 includes a second sensing port TEMP2 electrically connected to the second voltage dividing node M2, and the controller 15 senses a second electric signal after voltage division of the second temperature sensor 17 and the second resistor R2 through a second sensing port TEMP2 and controls the charging control circuit 14 according to the second electric signal, so that the electric power output from the charging circuit 13 charges the second battery pack 300. When the second electric signal indicates that the temperature of the second battery pack 300 is within the range of-35 degrees to-70 degrees, the controller 15 controls the charging circuit 13 and the charging control circuit 14 to be conducted, so that the charging circuit 13 is communicated with the second battery pack 300 to charge the second battery pack 300. When the second battery pack 300 is fully charged, the controller 15 controls the charging circuit 13 and the charging control circuit 14 to be conducted, so that the charging circuit 13 is communicated with the first battery pack 200 to charge the first battery pack 200. Due to the circuit arrangement, solar energy can be effectively utilized to charge the first battery pack 200 and the second battery pack 300 uninterruptedly, and the charging efficiency is improved.
In this embodiment, the controller 15 includes a sixth control port EN _ TEMP2, the second temperature detecting circuit 272 further includes a fourth transistor Q8, the fourth transistor Q8 is electrically connected to the sixth control port EN _ TEMP2 of the controller 15 and the second temperature sensor 17, and the controller 15 controls the on/off of the fourth transistor Q8 through the sixth control port EN _ TEMP2 to control the on/off of the second temperature sensor 17 and the power supply circuit 24. In some embodiments, when the temperature of the second battery pack 300 needs to be detected, the controller 15 controls the fourth transistor Q8 to be turned on through the sixth control port EN _ TEMP2, and controls the second temperature sensor 17 to communicate with the power supply circuit 24, so that the second temperature detection circuit 272 operates normally. When the temperature of the second battery pack 300 does not need to be detected, the controller 15 controls the fourth triode Q8 to be turned off through the sixth control port EN _ TEMP2, and controls the second temperature sensor 17 to be disconnected from the power supply circuit 24, so that the second temperature detection circuit 272 stops working, thereby preventing the controller 15 from being always connected with the power supply circuit 24 and reducing power consumption.
In this embodiment, the first Temperature sensor 16 and the second Temperature sensor 17 may be thermistors belonging to small-sized, high-precision chips and insulating polymer coatings of enameled copper wires, coated with epoxy resin, and NTC (Negative Temperature Coefficient) interchangeable thermistor sheets with bare tin-plated enameled copper leads.
In some embodiments, the heating control circuit 18 is used to electrically connect the heating assembly 400. The heating assembly 400 comprises a heating assembly anode HEAT + and a heating assembly cathode HEAT-, and the heating control circuit 18 is electrically connected with the heating assembly 400 through the heating assembly anode HEAT + and the heating assembly cathode HEAT-. The controller 15 is electrically connected to the heating control circuit 18, and the controller 15 is configured to control the heating control circuit 18 to enable the heating assembly 400 to heat the first battery pack 200 when the temperature of the first battery pack 200 is lower than the charging low-temperature protection threshold thereof. Due to the battery property of the first battery pack 200, normal charging is possible at an ambient temperature of 0-45 degrees. When the ambient temperature is lower than 0 degrees, the first battery pack 200 is under the low temperature protection, and when the ambient temperature is higher than 0 degrees, the first battery pack 200 releases the low temperature protection, and therefore, the charge low temperature protection threshold herein refers to 0 degrees.
In some embodiments, the controller 15 is configured to detect a first electrical signal output by the first temperature sensor 16, and control the heating control circuit 18 to enable the heating assembly 400 to heat the first battery pack 200 when the first electrical signal indicates that the temperature of the first battery pack 200 is lower than the charging cryoprotection threshold. In this embodiment, when the first temperature sensor 16 detects that the temperature of the first battery pack 200 is lower than 0 ℃, the first battery pack 200 is under low temperature protection, at this time, the controller 15 controls the heating control circuit 18 to heat the first battery pack 200 by the heating unit 400, and when the first temperature sensor 16 detects that the temperature of the first battery pack 200 is higher than 0 ℃, the first battery pack 200 releases the low temperature protection, and the controller 15 controls the heating control circuit 18 to stop heating the first battery pack 200 by the heating unit 400. Because first group battery 200 compares in the volume of second group battery 300 less, the cost is lower, carries out low temperature to first group battery 200 and charges and preheat, promotes the utilization ratio of first group battery 200, prolongs the life of first group battery 200 to reduce cost.
Due to the battery properties of the first battery pack 200 and the second battery pack 300, when the ambient temperature is lower than 0 ℃ and the illumination is sufficient, the controller 15 may control the heating control circuit 18 to enable the heating assembly 400 to charge the second battery pack 300, and at this time, the first battery pack 200 cannot be charged, so that when the ambient temperature is lower than 0 ℃, the first battery pack 200 is preferentially preheated by the heating assembly 400, and when the temperature of the first battery pack 200 is higher than 0 ℃, the first temperature sensor 16 detects that the temperature of the first battery pack 200 is higher than 0 ℃, and when the charging temperature of the first battery pack 200 is reached, the charging of the first battery pack 200 is switched. Due to the circuit arrangement, the first battery pack 200 and the second battery pack 300 can be charged in different temperature ranges, and the charging efficiency is improved.
In some embodiments, the heating control circuit 18 is electrically connected to the output terminal of the charging circuit 13 (shown in fig. 1, 4 and 6), and the controller 15 is configured to control the heating control circuit 18 to supply the electric energy output by the charging circuit 13 to the heating assembly 400 when the temperature of the first battery pack 200 is lower than the charging low-temperature protection threshold thereof. In this embodiment, when the first temperature sensor 16 detects that the temperature of the first battery pack 200 is lower than 0 ℃, the first battery pack 200 is under low temperature protection, and at this time, the controller 15 controls the heating control circuit 18 to supply the electric energy output by the charging circuit 13 to the heating assembly 400, so that the heating assembly 400 heats the first battery pack 200; when the first temperature sensor 16 detects that the temperature of the first battery pack 200 is higher than 0 ℃, the first battery pack 200 releases the low temperature protection, and the controller 15 controls the heating control circuit 18 to stop the charging circuit 13 from outputting the electric power, so that the heating assembly 400 stops heating the first battery pack 200. Compared with the second battery pack 300, the first battery pack 200 has smaller volume and lower cost, and the first battery pack 200 is charged and preheated at low temperature, so that the first battery pack 200 does not use the electric energy of the first battery pack 200 to maintain the battery temperature in the low-temperature charging and preheating process, the external heating assembly 400 is used for heating the first battery pack 200, and the first battery pack 200 starts to be charged after the temperature of the first battery pack 200 is increased, so that the power supply system can be charged in the whole time period, the utilization rate of the first battery pack 200 can be improved, the service life of the first battery pack 200 is prolonged, and the problem that the battery cannot be charged at low temperature is solved on the basis of reducing the cost.
As shown in fig. 1, 2 and 6, the controller 15 includes a seventh control port EN _ HEAT, the heating control circuit 18 includes a fifth transistor Q9 and a fifth switch Q10, the fifth transistor Q9 is electrically connected to the seventh control port EN _ HEAT and the positive pole HEAT of the heating element 400, and the fifth switch Q10 is electrically connected to the fifth transistor Q9 and the negative pole HEAT of the heating element 400. The controller 15 controls the on/off of the fifth triode Q9 through the seventh control port EN _ HEAT to control the on/off of the fifth switching tube Q10, thereby controlling the on/off of the heating assembly 400 and the first battery pack 200.
In some embodiments, when the first battery pack 200 needs to be heated, the controller 15 controls the fifth transistor Q9 to be turned on through the seventh control port EN _ HEAT, and controls the fifth switch Q10 to be turned on, so that the heating assembly positive pole HEAT + and the heating assembly negative pole HEAT-of the heating assembly 400 are electrically connected to the first battery pack 200, and thus the heating assembly 400 HEATs the first battery pack 200. When the first battery pack 200 does not need to be heated, the controller 15 controls the fifth triode Q9 to be turned off through the seventh control port EN _ HEAT, and controls the fifth switching tube Q10 to be turned off, so that the heating assembly positive pole HEAT + and the heating assembly negative pole HEAT-of the heating assembly 400 are disconnected from the first battery pack 200, and the heating assembly 400 stops heating the first battery pack 200.
In some embodiments, before the positive HEAT + of the heating element is connected to the fifth switching tube Q10, when the photovoltaic panel 100 has power output, the positive HEAT + of the heating element reaches the voltage of the first battery pack 200, and the voltage is divided by the resistor, so that the fifth switching tube Q10 is turned on, and when the seventh control port EN _ HEAT is enabled, the fifth transistor Q9 pulls the gate of the fifth switching tube Q10 down to the ground, and the fifth switching tube Q10 blocks the negative HEAT-of the heating element and the ground, so that the heating element 400 is turned off. Due to the circuit arrangement, the heating assembly 400 is charged by the charging circuit 13 of the solar control circuit 10 or the photovoltaic panel 100, the heating assembly 400 can stably heat the first battery pack 200, the first battery pack 200 is timely preheated, and the charging efficiency of the first battery pack 200 is improved.
In some embodiments, the battery voltage collecting circuit 19 and the current collecting circuit 20 are both electrically connected to the battery interface 12, the battery voltage collecting circuit 19 is configured to collect a first charging voltage of the first battery pack 200 and a second charging voltage of the second battery pack 300, and the current collecting circuit 20 is configured to collect a first charging current output by the first battery pack interface 121 and a second charging current output by the second battery pack interface 122; the controller 15 is electrically connected with the battery pack voltage acquisition circuit 19 and the current acquisition circuit 20, and the controller 15 is used for controlling the charging control circuit 14 to enable the charging circuit 13 to stop charging the first battery pack 200 when the first charging voltage is higher than the first charging voltage threshold and the first charging current is smaller than the first charging current cut-off threshold; when the second charging voltage is higher than the second charging voltage threshold and the second charging current is smaller than the second charging current cutoff threshold, the charging control circuit 14 is controlled to stop the charging circuit 13 from charging the second battery pack 300.
As shown in fig. 1, fig. 2, and fig. 4 to fig. 7, the battery voltage collecting circuit 19 includes a first battery voltage collecting circuit 191, and the first battery voltage collecting circuit 191 is connected to the first battery 200 through a first battery interface 121, and is configured to collect a first charging voltage of the first battery 200. In some embodiments, the current collecting circuit 20 includes a first current collecting circuit 201, and the first current collecting circuit 201 is connected to the first battery pack 200 through the first battery pack interface 121, and is configured to collect the first charging current output by the first battery pack interface 121.
In some embodiments, the controller 15 includes a third acquisition port VBAT1 and a fourth acquisition port IBAT1, the third acquisition port VBAT1 of the controller 15 being electrically connected to the first battery pack voltage acquisition circuit 191, and the fourth acquisition port IBAT1 of the controller 15 being electrically connected to the first current acquisition circuit 201. The controller 15 is configured to control the first charging control circuit 141 to disconnect when the first charging voltage is higher than the first charging voltage threshold and the first charging current is smaller than the first charging current cutoff threshold, so that the charging circuit 13 is disconnected from the first battery pack 200, and the charging of the first battery pack 200 is stopped. The first charging voltage threshold refers to an upper limit value of a first charging voltage of the first battery pack 200, the first charging current cutoff threshold refers to a lower limit value of a first charging current of the first battery pack 200, and when the first charging voltage threshold is higher than the upper limit value of the first charging voltage and lower than the lower limit value of the first charging current, the first battery pack 200 is stopped being charged, so that constant-temperature and constant-voltage operation of the solar control circuit 10 is ensured, and the controller 15 is prevented from being damaged.
In the embodiment shown in fig. 7, the first battery pack voltage collecting circuit 191 includes a third resistor R3 and a fourth resistor R4, the first battery pack voltage collecting circuit 191 includes a third voltage dividing node M3, the third resistor R3 is electrically connected between the first battery pack interface positive electrode BAT1+ and the third voltage dividing node M3 of the first battery pack interface 121, the fourth resistor R4 is electrically connected between the third voltage dividing node M3 and the ground terminal, the third collecting port VBAT1 of the controller 15 is electrically connected to the third voltage dividing node M3, and the voltage after voltage division by the third resistor R3 and the fourth resistor R4 is detected through the third collecting port VBAT1 to obtain the first charging voltage of the first battery pack 200, and the first charging voltage thus obtained is compared with the first charging voltage threshold, and when the first charging voltage threshold is higher than the first charging voltage threshold, the first battery pack 200 is stopped from being charged, so as to avoid the controller 15 from being damaged.
In the embodiment shown in fig. 7, the first current collecting circuit 201 includes a first operational amplifier U2, a non-inverting input terminal of the first operational amplifier U2 is electrically connected to the power conversion circuit 25 and the negative electrode BAT1 of the first battery pack interface 121, an output terminal of the first operational amplifier U2 is electrically connected to the fourth collecting port IBAT1 of the controller 15, the controller 15 detects an electrical signal output by the first operational amplifier U2 through the fourth collecting port IBAT1 to obtain a first charging current output by the first battery pack interface 121, the obtained first charging circuit is compared with a first charging current cutoff threshold, and when the obtained first charging circuit is lower than the first charging current cutoff threshold, the first battery pack 200 is stopped from being charged, so as to prevent the controller 15 from being damaged. The power conversion circuit 25 provides a 5V power voltage to the first current collecting circuit 201 to ensure that the first operational amplifier U2 operates normally, and the specific circuits and implementation processes thereof are described below.
Similar to the embodiment shown in fig. 7, the battery voltage acquisition circuit 19 includes a second battery voltage acquisition circuit (not shown) and a second current acquisition circuit (not shown), electrically connected to the controller 15. The second battery voltage acquisition circuit has the same circuit structure as the first battery voltage acquisition circuit 191, and the specific implementation process and the working principle thereof are described above in detail, and similarly, the second current acquisition circuit has the same circuit structure as the first current acquisition circuit 201, and the specific implementation process and the working principle thereof are described above in detail, and are not described herein again.
In some embodiments, the first reverse connection prevention circuit 21 is electrically connected between the battery pack interface 12 and the current collection circuit 20, and the controller 15 is electrically connected to the first reverse connection prevention circuit 21, and is configured to control the first reverse connection prevention circuit 21 to disconnect the battery pack interface 12 from the current collection circuit 20 when the positive electrode and the negative electrode of the battery pack interface 12 are reversely connected. In some embodiments, the first anti-reverse connection circuit 21 is electrically connected between the first current collecting circuit 201 and the first battery pack interface positive electrode BAT1+ of the first battery pack interface 121, so as to prevent the first battery pack interface positive electrode BAT1+ and the first battery pack interface negative electrode BAT 1-of the first battery pack interface 121 from being reversely connected, and prevent the controller 15 from being damaged. In some other embodiments, the first anti-reverse connection circuit 21 is electrically connected between the second current collecting circuit (not shown) and the first battery pack interface positive electrode BAT1+ of the first battery pack interface 121, so as to prevent the first battery pack interface positive electrode BAT1+ and the first battery pack interface negative electrode BAT 1-of the first battery pack interface 121 from being reversely connected, and prevent the controller 15 from being damaged.
In the embodiment shown in fig. 7, the first anti-reverse connection circuit 21 includes a sixth switch tube Q11 electrically connected to the first battery pack interface positive electrode BAT1+, the first battery pack interface negative electrode BAT 1-and the input end of the first current collecting circuit 201, and when the first battery pack interface positive electrode BAT1+ and the first battery pack interface negative electrode BAT 1-are normally connected, the sixth switch tube Q11 is turned on, and the controller 15 detects the first charging current output by the first battery pack interface 121 and collected by the first current collecting circuit 201 through a fourth collecting port IBAT 1. When the positive electrode BAT1+ of the first battery pack interface and the negative electrode BAT 1-of the first battery pack interface are reversely connected, the sixth switching tube Q11 is turned off, so that the current of the first battery pack 200 is prevented from reversely flowing into the controller 15, the controller 15 is prevented from being damaged, and the controller 15 and devices electrically connected with the controller 15 are protected.
In some embodiments, the second reverse connection preventing circuit 22 is electrically connected between the solar input interface 11 and the charging circuit 13, and the controller 15 is electrically connected to the second reverse connection preventing circuit 22, and is configured to control the second reverse connection preventing circuit 22 to disconnect the solar input interface 11 from the charging circuit 13 when the positive electrode and the negative electrode of the solar input interface 11 are reversely connected.
As shown in fig. 1 and 8, the controller 15 includes an eighth control port SEN1, and the solar input interface 11 includes a solar input interface positive electrode PV + and a solar input interface negative electrode PV-. The second anti-reverse connection circuit 22 comprises a sixth triode Q12 and a seventh switch tube Q13, the sixth triode Q12 is electrically connected with the eighth control port SEN1 of the controller 15, and the seventh switch tube Q13 is electrically connected with the positive electrode PV + of the solar input interface, the negative electrode PV of the solar input interface and the sixth triode Q12. The controller 15 controls the on/off of the sixth triode Q12 through the eighth control port SEN1 to control the on/off of the seventh switching tube Q13. In some embodiments, when the solar input interface positive electrode PV + and the solar input interface negative electrode PV — are normally connected, the controller 15 controls the sixth transistor Q12 to be turned on through the eighth control port SEN1 to control the seventh switch Q13 to be turned on, and at this time, the solar input interface 11 may normally input the voltage. When the positive electrode PV + of the solar input interface and the negative electrode PV-of the solar input interface are reversely connected, the controller 15 controls the sixth triode Q12 to be turned off through the eighth control port SEN1, and controls the seventh switching tube Q13 to be turned off, at this time, the solar input interface 11 cannot normally input voltage, and the controller 15 is prevented from being damaged.
In some embodiments, the input voltage collecting circuit 23 is electrically connected to the solar input interface 11 for collecting the output voltage of the photovoltaic panel 100, and the controller 15 is electrically connected to the input voltage collecting circuit 23 for controlling the charging circuit 13 to charge the first battery pack 200 or the second battery pack 300 when the voltage collected by the input voltage collecting circuit 23 is higher than at least one of the voltage of the first battery pack 200 and the voltage of the second battery pack 300.
Referring to fig. 1, 2 and 9, the controller 15 includes a fifth collecting port VS1, the input voltage collecting circuit 23 is electrically connected to the solar input interface positive electrode PV + and the fifth collecting port VS1, when the solar input interface positive electrode PV + and the solar input interface negative electrode PV-are normally connected, the controller 15 collects the voltage input to the solar control circuit 10 from the photovoltaic panel 100 through the fifth collecting port VS1, and when the voltage input to the solar control circuit 10 is higher than the voltage of the first battery pack 200 or the second battery pack 300, the first battery pack 200 or the second battery pack 300 is charged, so that the solar control circuit 10 can normally operate and the stability is improved.
In the embodiment shown in fig. 9, the input voltage collecting circuit 23 includes a fifth resistor R5 and a sixth resistor R6, the input voltage collecting circuit 23 includes a fourth voltage-dividing node M4, the fifth resistor R5 is electrically connected between the solar input interface positive electrode PV + and the fourth voltage-dividing node M4, and the sixth resistor R6 is electrically connected between the fourth voltage-dividing node M4 and the ground. The fifth collecting port VS1 of the controller 15 is electrically connected to the fourth voltage dividing node M4, and detects the voltage after voltage division by the fifth resistor R5 and the sixth resistor R6 through the fifth collecting port VS1 to obtain the voltage input to the solar control circuit 10 by the solar input interface 11, and when the collected voltage input to the solar control circuit 10 by the solar input interface 11 is higher than the voltage of the first battery pack 200, the charging control circuit 14 is controlled to charge the first battery pack 200 by the charging circuit 13. In other embodiments, when the collected voltage input to the solar control circuit 10 from the solar input interface 11 is higher than the voltage of the second battery pack 300, the charging control circuit 14 is controlled to enable the charging circuit 13 to charge the second battery pack 300. In other embodiments, when the collected voltage input to the solar control circuit 10 from the solar input interface 11 is higher than the voltages of the first battery pack 200 and the second battery pack 300, the charging control circuit 14 is controlled to enable the charging circuit 13 to alternately charge the first battery pack 200 and the second battery pack 300. In this process, the voltage of the first battery pack 200 may be collected by the first battery pack voltage collecting circuit 191 in the embodiment shown in fig. 7, and accordingly, the voltage of the second battery pack 300 may be collected by the second battery pack voltage collecting circuit similar to the embodiment shown in fig. 7.
In some embodiments, controller 15 includes a power supply terminal VDDA (as shown in fig. 2), an input of power supply circuit 24 is electrically coupled to first battery pack 200 and second battery pack 300, an output of power supply circuit 24 is electrically coupled to power supply terminal VDDA, and first battery pack 200 and second battery pack 300 provide power to controller 15 via power supply circuit 24. As shown in fig. 1 and fig. 10, the input end of the power supply circuit 24 is electrically connected to the first battery pack interface positive electrode BAT1+ of the first battery pack interface 121 and the second battery pack interface positive electrode BAT2+ of the second battery pack interface 122, the power supply circuit 24 is electrically connected to the first battery pack 200 through the first battery pack interface positive electrode BAT1+ of the first battery pack interface 121, and the power supply circuit 24 is electrically connected to the second battery pack 300 through the second battery pack interface positive electrode BAT2+ of the second battery pack interface 122. In the embodiment shown in fig. 10, the first battery pack 200 and the second battery pack 300 may provide a voltage of 3.3V to the controller 15, so as to ensure that the controller 15 and devices electrically connected to the controller 15 operate normally, thereby improving the stability of the circuit.
In some embodiments, the power conversion circuit 25 is electrically connected to the solar input interface 11 and the charging circuit 13, and the power conversion circuit 25 is configured to convert the voltage input by the solar input interface 11 to supply power to the charging circuit 13. Referring to fig. 1, 3 and 11, the power conversion circuit 25 includes a first voltage-dropping chip U3, an input terminal of the first voltage-dropping chip U3 is electrically connected to an output terminal of the second anti-reverse connection circuit 22 (as shown in fig. 8), and when a positive electrode PV + of the solar input interface 11 and a negative electrode PV-of the solar input interface are normally connected, the power conversion circuit 25 receives a voltage input by the solar input interface 11, and performs voltage-dropping conversion and output on the voltage input by the solar input interface 11 through the first voltage-dropping chip U3. For example, the output 12V power voltage can be converted to supply power to the charging circuit 13, so as to ensure the normal operation of the charging circuit 13 and improve the circuit stability.
In some embodiments, the power conversion circuit 25 is electrically connected to the solar input interface 11 and the current collection circuit 20, and is configured to convert the voltage input by the solar input interface 11 to supply power to the current collection circuit 20. As shown in fig. 1, 7, and 11, the power conversion circuit 25 includes a second buck chip U4, an input terminal of the second buck chip U4 is connected to an output terminal of the first buck chip U3, and the power conversion circuit 25 down-converts and outputs the voltage output by the first buck chip U3 through the second buck chip U4. For example, a 5V power supply voltage may be output to power the current collection circuit 20, so as to ensure that the current collection circuit 20 operates normally.
In some embodiments, load switching circuit 26 is used to connect load 500, and load switching circuit 26 is electrically connected to first battery pack 200 through first battery pack interface 121 and to second battery pack 300 through second battery pack interface 122; when the voltage of first battery pack 200 is higher than the voltage of second battery pack 300, load switching circuit 26 is used to switch first battery pack 200 to supply power to load 500; load switching circuit 26 is configured to switch second battery stack 300 to supply load 500 when the voltage of first battery stack 200 is lower than the voltage of second battery stack 300. As shown in fig. 1, 4 and 12, the load switching circuit 26 is electrically connected to the first battery pack 200 through a first battery pack interface positive electrode BAT1+ of the first battery pack interface 121, and is electrically connected to the second battery pack 300 through a second battery pack interface positive electrode BAT2+ of the second battery pack interface 122, and the load switching circuit 26 is configured to switch the first battery pack 200 to supply power to the load 500 when receiving that the voltage of the first battery pack 200 is higher than the voltage of the second battery pack 300, and to switch the second battery pack 300 to supply power to the load 500 when receiving that the voltage of the first battery pack 200 is lower than the voltage of the second battery pack 300. By arranging the load switching circuit 26, the first battery pack 200 and the second battery pack 300 can supply power to the load 500 uninterruptedly, so that the normal work of the load 500 is ensured, and the service life of the load 500 is prolonged.
In the embodiment shown in fig. 12, the load switching circuit 26 can combine the output terminals of the first battery pack 200 and the second battery pack 300 in two ways to output to the load 500, and the circuit structure thereof may use a unidirectional conductive circuit, which may be in an input sharing mode, that is, the first battery pack interface positive terminal BAT1+ and the second battery pack interface positive terminal BAT2+ output together.
In some embodiments, the load switching circuit 26 includes a switching chip U5, an eighth switching tube Q14 and a ninth switching tube Q15, a first input end of the switching chip U5 is electrically connected to the first battery pack interface positive electrode BAT1 of the first battery pack interface 121, a second input end of the switching chip U2 is electrically connected to the second battery pack interface positive electrode BAT2 of the second battery pack interface 122, an output end VS2 of the switching chip U5 is electrically connected to the load 500, the eighth switching tube Q14 is electrically connected to the first control end of the switching chip U5, and the switching chip U2 controls on and off of the first battery pack 200 and the load 500 by controlling on and off of the eighth switching tube Q14; the ninth switching tube Q15 is electrically connected to the second control terminal of the switching chip U5, and the switching chip U2 controls the on/off of the second battery pack 300 and the load 500 by controlling the on/off of the ninth switching tube Q15. In some embodiments, when the voltage difference between the first battery pack interface positive electrode BAT1+ and the second battery pack interface positive electrode BAT2+ reaches the specified value of the switching chip U5, the output is switched to the higher one of the first battery pack interface positive electrode BAT1+ and the second battery pack interface positive electrode BAT2+, thereby realizing the switching of the first battery pack 200 and the second battery pack 300 in two ways. For example, when one of the first battery pack 200 or the second battery pack 300 is in an undervoltage state, the other is switched to supply power.
In some embodiments, when the voltage input to the first input terminal of the switching chip U5 by the first battery pack 200 is higher than the voltage input to the second input terminal of the switching chip U5 by the second battery pack 300, the first control terminal of the switching chip U5 controls the eighth switching tube Q14 to be turned on, so that the first battery pack 200 communicates with the load 500, and thus the load 500 is supplied with power by the first battery pack 200. In some embodiments, when the voltage of the first battery pack 200 input to the first input terminal of the switching chip U5 is lower than the voltage of the second battery pack 300 input to the second input terminal of the switching chip U5, the second control terminal of the switching chip U5 controls the ninth switching tube Q15 to be turned on, so that the second battery pack 300 is communicated with the load 500, and thus the second battery pack 300 supplies power to the load 500.
In other embodiments, the controller 15 is electrically connected to the load switching circuit 26, and the controller 15 is configured to control the load switching circuit 26 to switch the first battery pack 200 to supply power to the load 500 when the temperature of the first battery pack 200 is within the discharging temperature range thereof and the first battery pack 200 has no discharging protection event, and control the load switching circuit 26 to switch the second battery pack 300 to supply power to the load 500 when the temperature of the first battery pack 200 is outside the discharging temperature range or the first battery pack 200 has a discharging protection event. Due to the battery properties of first battery pack 200 and second battery pack 300, the discharge temperature of first battery pack 200 may range from-20 degrees to 60 degrees, and the discharge protection event of first battery pack 200 may be an over-temperature, low battery, etc. event of first battery pack 200. When the first battery pack 200 is in the discharging temperature range and no over-temperature or low-power protection event occurs, the first battery pack 200 can be normally discharged. In the embodiment shown in fig. 1 and 2, the controller 15 includes a ninth control port SEN2 electrically connected to the load switching circuit 26, and when the first battery pack 200 is normally discharged, the controller 15 can control the load switching circuit 26 through the ninth control port SEN2 to switch the first battery pack 200 to supply power to the load 500. When the first battery pack 200 is out of the discharging temperature range and a protection event such as over-temperature or low battery occurs, the first battery pack 200 cannot be discharged. At this time, the controller 15 may control the load switching circuit 26 through the load switching circuit 26 to switch the second battery pack 300 to supply power to the load 500. With such a circuit arrangement, the load switching circuit 26 is controlled to switch between the first battery pack 200 and the second battery pack 300, so that the uninterrupted power supply for the load 500 is ensured, and the service life of the load 500 is prolonged.
In practical application, the solar control circuit 10 preferentially controls the first battery pack 200 to be charged by using the battery attributes of the first battery pack 200 and the second battery pack 300, switches to the second battery pack 300 to be charged when the first battery pack 200 is fully charged or the first battery pack 200 is under high/low temperature protection, performs charging low temperature protection preheating on the first battery pack 200 when the first battery pack 200 is under charging low temperature protection, and normally charges the first battery pack 200 when the temperature of the first battery pack 200 is increased to be within the charging temperature range. So set up, whole operation process does not consume the electric energy heating of battery itself, utilizes outside energy to its heating, still usable under low temperature environment, promotes the utilization ratio of group battery for the time of endurance extension of system under no illumination condition.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims (10)

1. A solar control circuit, comprising:
the solar energy input interface is used for electrically connecting the photovoltaic panel;
the battery pack interface comprises a first battery pack interface and a second battery pack interface, the first battery pack interface is used for being electrically connected with a first battery pack, and the second battery pack interface is used for being electrically connected with a second battery pack;
the input end of the charging circuit is electrically connected with the solar input interface, and the output end of the charging circuit is electrically connected with the battery pack interface;
the charging control circuit is electrically connected between the charging circuit and the battery pack interface; and
the controller is electrically connected with the charging circuit and the charging control circuit, the controller is used for controlling the charging circuit, the controller is used for controlling the temperature of the first battery pack within the charging temperature range, the charging control circuit is controlled to enable the electric energy output by the charging circuit to charge the first battery pack, the temperature of the first battery pack is controlled when the charging temperature range is out, the charging control circuit is controlled to enable the electric energy output by the charging circuit to charge the second battery pack.
2. The solar control circuit of claim 1, further comprising a heating control circuit for electrically connecting a heating element, wherein the controller is electrically connected to the heating control circuit, and wherein the controller is configured to control the heating control circuit to cause the heating element to heat the first battery pack when the temperature of the first battery pack is lower than the charging low temperature protection threshold thereof.
3. The solar control circuit according to claim 2, wherein the heating control circuit is electrically connected to an output terminal of the charging circuit, and the controller is configured to control the heating control circuit to supply the electric energy output by the charging circuit to the heating element when the temperature of the first battery pack is lower than a charging low-temperature protection threshold thereof; and/or
The solar control circuit comprises a first temperature sensor, a second temperature sensor and a control circuit, wherein the first temperature sensor is used for sensing the temperature of the first battery pack and generating a corresponding first electric signal; the controller is electrically connected with the first temperature sensor and used for detecting the first electric signal output by the first temperature sensor, and when the first electric signal indicates that the temperature of the first battery pack is lower than the charging low-temperature protection threshold value, the controller controls the heating control circuit to enable the heating assembly to heat the first battery pack.
4. The solar control circuit of claim 1, comprising a first temperature sensor for sensing a temperature of the first battery pack and generating a corresponding first electrical signal;
the controller is electrically connected with the first temperature sensor and used for detecting the first electric signal output by the first temperature sensor and controlling the charging control circuit according to the first electric signal so that the electric energy output by the charging circuit charges the first battery pack or the second battery pack.
5. The solar control circuit of claim 1, comprising a second temperature sensor for sensing a temperature of the second battery pack and generating a corresponding second electrical signal;
the controller is electrically connected with the second temperature sensor and used for detecting the second electric signal output by the second temperature sensor and controlling the charging control circuit according to the second electric signal so that the electric energy output by the charging circuit charges the second battery pack or the first battery pack.
6. The solar control circuit according to claim 1, wherein the solar control circuit comprises a battery voltage acquisition circuit and a current acquisition circuit, the battery voltage acquisition circuit and the current acquisition circuit are electrically connected to the battery interface, the battery voltage acquisition circuit is configured to acquire a first charging voltage of the first battery and a second charging voltage of the second battery, and the current acquisition circuit is configured to acquire a first charging current output by the first battery interface and a second charging current output by the second battery interface;
the controller is electrically connected with the battery pack voltage acquisition circuit and the current acquisition circuit, and is used for controlling the charging control circuit to enable the charging circuit to stop charging the first battery pack when the first charging voltage is higher than a first charging voltage threshold value and the first charging current is smaller than a first charging current cut-off threshold value; and when the second charging voltage is higher than a second charging voltage threshold and the second charging current is smaller than a second charging current cut-off threshold, controlling the charging control circuit to enable the charging circuit to stop charging the second battery pack.
7. The solar control circuit according to claim 6, further comprising a power conversion circuit electrically connected to the solar input interface and the current collection circuit, for converting the voltage input by the solar input interface to supply power to the current collection circuit; and/or
The solar control circuit further comprises a first reverse-connection preventing circuit electrically connected between the battery pack interface and the current collecting circuit, and the controller is electrically connected with the first reverse-connection preventing circuit and used for controlling the first reverse-connection preventing circuit to disconnect the battery pack interface and the current collecting circuit when the positive electrode and the negative electrode of the battery pack interface are reversely connected.
8. The solar control circuit of claim 1, further comprising a load switching circuit for connecting a load, the load switching circuit being electrically connected to the first battery pack through the first battery pack interface and electrically connected to the second battery pack through the second battery pack interface;
when the voltage of the first battery pack is higher than that of the second battery pack, the load switching circuit is used for switching the first battery pack to supply power to the load; when the voltage of the first battery pack is lower than that of the second battery pack, the load switching circuit is used for switching the second battery pack to supply power to the load; and/or
The controller is electrically connected with the load switching circuit and used for controlling the load switching circuit to switch the first battery pack to supply power to the load when the temperature of the first battery pack is within the discharging temperature range of the first battery pack and the first battery pack has no discharging protection event, and controlling the load switching circuit to switch the second battery pack to supply power to the load when the temperature of the first battery pack is out of the discharging temperature range or the first battery pack has the discharging protection event.
9. The solar control circuit according to claim 1, wherein the solar control circuit comprises an input voltage acquisition circuit electrically connected to the solar input interface for acquiring the output voltage of the photovoltaic panel, and the controller is electrically connected to the input voltage acquisition circuit for controlling the charging circuit to charge the first battery pack or the second battery pack when the voltage acquired by the input voltage acquisition circuit is higher than at least one of the voltage of the first battery pack and the voltage of the second battery pack.
10. The solar control circuit according to any one of claims 1 to 9, further comprising a second reverse connection prevention circuit electrically connected between the solar input interface and the charging circuit, wherein the controller is electrically connected to the second reverse connection prevention circuit and configured to control the second reverse connection prevention circuit to disconnect the solar input interface from the charging circuit when the positive electrode and the negative electrode of the solar input interface are reversely connected; and/or
The solar control circuit further comprises a power supply circuit, the controller comprises a power supply end, the input end of the power supply circuit is electrically connected with the first battery pack and the second battery pack, the output end of the power supply circuit is electrically connected with the power supply end, and the first battery pack and the second battery pack supply power to the controller through the power supply circuit; and/or
The solar control circuit further comprises a power conversion circuit, the power conversion circuit is electrically connected with the solar input interface and the charging circuit, and the power conversion circuit is used for converting the voltage input by the solar input interface and supplying power to the charging circuit; and/or
The charging temperature range of the second battery pack is greater than the charging temperature range of the first battery pack.
CN202110400121.5A 2021-04-14 2021-04-14 Solar control circuit Pending CN112952963A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113346609A (en) * 2021-08-05 2021-09-03 深圳市慧航星科技有限公司 Unmanned aerial vehicle three-dimensional monitoring method, device, computer readable storage medium and system
CN113629809A (en) * 2021-08-07 2021-11-09 西北工业大学 Power isolation protection circuit for small satellite
CN116914891A (en) * 2023-08-11 2023-10-20 江苏健龙电器有限公司 Automatic charging control system for shipborne box type power supply

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205610257U (en) * 2016-03-29 2016-09-28 维沃移动通信有限公司 Mobile terminal's heating control circuit and mobile terminal
CN111245066A (en) * 2020-03-19 2020-06-05 上海钧正网络科技有限公司 Charging system and charging management method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205610257U (en) * 2016-03-29 2016-09-28 维沃移动通信有限公司 Mobile terminal's heating control circuit and mobile terminal
CN111245066A (en) * 2020-03-19 2020-06-05 上海钧正网络科技有限公司 Charging system and charging management method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113346609A (en) * 2021-08-05 2021-09-03 深圳市慧航星科技有限公司 Unmanned aerial vehicle three-dimensional monitoring method, device, computer readable storage medium and system
CN113346609B (en) * 2021-08-05 2021-11-05 深圳市慧航星科技有限公司 Unmanned aerial vehicle three-dimensional monitoring method, device, computer readable storage medium and system
CN113629809A (en) * 2021-08-07 2021-11-09 西北工业大学 Power isolation protection circuit for small satellite
CN113629809B (en) * 2021-08-07 2024-01-16 西北工业大学 Power isolation protection circuit for small satellite
CN116914891A (en) * 2023-08-11 2023-10-20 江苏健龙电器有限公司 Automatic charging control system for shipborne box type power supply

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Application publication date: 20210611