CN116039430A - Solar boosting MPPT charging controller with storage battery heating function - Google Patents

Solar boosting MPPT charging controller with storage battery heating function Download PDF

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Publication number
CN116039430A
CN116039430A CN202310035780.2A CN202310035780A CN116039430A CN 116039430 A CN116039430 A CN 116039430A CN 202310035780 A CN202310035780 A CN 202310035780A CN 116039430 A CN116039430 A CN 116039430A
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voltage
control circuit
sampling resistor
pin
chip
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刘晓峰
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/50—Charging stations characterised by energy-storage or power-generation means
    • B60L53/51—Photovoltaic means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
    • H01M10/6571—Resistive heaters
    • 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
    • H02J7/34—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/46—Vehicles with auxiliary ad-on propulsions, e.g. add-on electric motor kits for bicycles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a solar boosting MPPT charging controller with a storage battery heating function, which comprises: the device comprises a boosting constant current circuit, an MPPT control circuit, a floating charge control circuit and a storage battery heating control circuit; the MPPT control circuit is connected with the voltage output end of the solar panel and is used for detecting and controlling the output voltage of the solar panel; the uniform floating charge control circuit is connected with the storage battery circuit and is used for detecting and controlling the uniform floating charge state of the storage battery; the storage battery heating control circuit is respectively connected with the MPPT control circuit, the uniform floating charge control circuit and the solar panel and is used for acquiring the output voltage of the solar panel and the uniform floating charge state of the storage battery, heating the storage battery by utilizing the residual output energy of the solar panel when the storage battery is in the floating charge state, and controlling the output voltage of the solar panel to fluctuate near the MPPT point. The controller can reduce the cost of the MPPT charging controller and promote the continuous voyage of the storage battery in a low-temperature environment.

Description

Solar boosting MPPT charging controller with storage battery heating function
Technical Field
The invention belongs to the technical field of solar charging of electric bicycles, and particularly relates to a solar boosting MPPT charging controller with a storage battery heating function.
Background
In the technical field of solar charging of electric bicycles, two solar boosting MPPT charging controllers are available on the market. One is a boost MPPT charge controller based on a dedicated chip scheme, and consumers have little purchase will because the chip is extremely expensive. The other is a solar boosting MPPT charging controller based on a singlechip, the development process of the solar boosting MPPT charging controller needs the participation of software and hardware personnel, the research and development cost and the hardware cost of the product are high, and the solar boosting MPPT charging controller cannot be popularized in the market. The two products have an important defect that the problem that the endurance of the storage battery is seriously reduced in a low-temperature environment cannot be solved.
Therefore, how to reduce the cost of the MPPT charge controller and promote the battery life in a low-temperature environment becomes a key problem in current research.
Disclosure of Invention
In view of the above problems, the present invention provides a solar boost MPPT charging controller with a battery heating function, which at least solves some of the above technical problems, and the controller can reduce the cost of the MPPT charging controller and improve the battery endurance in a low-temperature environment.
The embodiment of the invention provides a solar boosting MPPT charging controller with a storage battery heating function, which comprises the following components: the device comprises a boosting constant current circuit, an MPPT control circuit, a floating charge control circuit and a storage battery heating control circuit;
the MPPT control circuit is connected with the voltage output end of the solar panel and is used for detecting and controlling the output voltage of the solar panel;
the uniform floating charge control circuit is connected with the storage battery circuit and is used for detecting and controlling the uniform floating charge state of the storage battery;
the storage battery heating control circuit is respectively connected with the MPPT control circuit, the uniform floating charge control circuit and the solar panel output, and is used for acquiring the output voltage of the solar panel and the uniform floating charge state of the storage battery, heating the storage battery by utilizing the residual output energy of the solar panel when the storage battery is in the floating charge state, and controlling the output voltage of the solar panel to fluctuate near the MPPT point.
Further, the battery heating control circuit includes: the switch, the epoxy resin heating sheet, the fourth switch tube and the AND gate;
the drain electrode of the fourth switching tube is connected with the second end of the epoxy resin heating sheet;
the first end of the epoxy resin heating sheet is connected with the second end of the switch;
the first end of the switch is connected with the output plus end of the solar panel;
the source electrode of the fourth switching tube is grounded;
the grid electrode of the fourth switching tube is connected with the third pin of the AND gate;
the first pin of the AND gate is connected with the MPPT control circuit;
and the second pin of the AND gate is connected with the floating charge control circuit.
Further, the battery heating control circuit further includes: a resistor nine;
the first end of the ninth resistor is connected with the second pin of the AND gate;
and the second end of the ninth resistor is connected with the source electrode of the fourth switching tube.
Further, the step-up constant current circuit includes: the power supply comprises an inductor, a diode I, a switching tube I and a boosting constant current control IC chip;
the first end of the inductor is connected with the output plus end of the solar panel;
the second end of the inductor is connected with the anode of the first diode;
the drain electrode of the first switching tube is connected with the second end of the inductor;
the grid electrode of the first switching tube is connected with the DRV pin of the boosting constant current control IC chip;
and the source electrode of the first switching tube is connected with the CS pin of the boosting constant current control IC chip.
Further, the boost constant current circuit further includes: a second capacitor and a second current sampling resistor;
the anode of the second capacitor is connected with the cathode of the first diode;
the negative electrode of the second capacitor is connected with the second end of the second current sampling resistor and grounded;
and the first end of the second current sampling resistor is connected with the CS pin of the boosting constant current control IC chip.
Further, the MPPT control circuit includes: a first voltage sampling resistor, a second voltage sampling resistor, an adjustable resistor and a first voltage detection IC chip;
the first end of the first voltage sampling resistor is connected with the output plus end of the solar panel;
the second end of the first voltage sampling resistor is connected with the first end of the second voltage sampling resistor;
the second end of the second voltage sampling resistor is connected with the first end of the adjustable resistor;
the second end of the adjustable resistor is grounded;
the pin A of the first voltage detection IC chip is connected with the second end of the first voltage sampling resistor and the first end of the second voltage sampling resistor;
the pin B of the first voltage detection IC chip is connected with the second end of the second voltage sampling resistor and the first end of the adjustable resistor;
an OUT+ pin of the first voltage detection IC chip is connected with an FB pin of the boosting constant current control IC chip through a third diode;
the OUT-pin of the first voltage detection IC chip is connected with the first pin of the AND gate.
Further, the homogeneous floating charge control circuit includes: and the floating charge voltage control circuit and the floating charge flow control circuit.
Further, the floating charge voltage control circuit includes: a first voltage stabilizing tube, a second voltage stabilizing tube, a third switching tube and a third voltage detection IC chip;
the negative electrode of the first voltage stabilizing tube is connected with the positive end of the storage battery through a second diode;
the positive electrode of the first voltage stabilizing tube is connected with the negative electrode of the second voltage stabilizing tube;
the positive electrode of the second voltage stabilizing tube is connected with the negative electrode of the third voltage stabilizing tube;
the positive electrode of the third voltage stabilizing tube is connected with the FB pin of the boosting constant current control IC chip in the source electrode of the third switching tube and the boosting constant current circuit;
the drain electrode of the third switching tube is connected with the anode of the second voltage stabilizing tube and the cathode of the third voltage stabilizing tube;
the grid electrode of the third switching tube is connected with the OUT-pin of the third voltage detection IC chip;
and the OUT-pin of the third voltage detection IC chip is connected with the second pin of the AND gate.
Further, the float charge flow control circuit includes: a fifth voltage sampling resistor, a sixth voltage sampling resistor, a seventh voltage sampling resistor, a first current sampling resistor and a second switching tube;
the first end of the fifth voltage sampling resistor is connected with the anode of the second diode;
the second end of the fifth voltage sampling resistor is connected with the first end of the sixth voltage sampling resistor respectively, and the pin A of the third voltage detection IC chip is connected with the second end of the fifth voltage sampling resistor;
the second end of the sixth voltage sampling resistor is connected with the first end of the seventh voltage sampling resistor and the pin B of the third voltage detection IC chip respectively;
the second end of the seventh voltage sampling resistor is grounded;
the grid electrode of the second switching tube is connected with the OUT+ pin of the third voltage detection IC chip and is connected with the second end of the seventh voltage sampling resistor through the eighth resistor;
the drain electrode of the second switching tube is connected with the FB pin of the boosting constant current control IC chip in the boosting constant current circuit through a fourth resistor;
the source electrode of the second switching tube is connected with the first end of the first current sampling resistor;
and the second end of the first current sampling resistor is connected with the drain electrode of the second switching tube and the storage battery end.
Further, the first capacitor is also included;
the first end of the first capacitor is connected with the output plus end of the solar panel;
the second end of the first capacitor is grounded.
Compared with the prior art, the solar boosting MPPT charging controller with the storage battery heating function has the following beneficial effects:
1. the invention uses the extremely common low-cost boosting constant-current control IC chip in the LED illumination field, is assisted with the MPPT control circuit, the floating charge control circuit and the storage battery heating circuit, realizes the solar boosting MPPT charging control, only depends on hardware, and solves the cost problem of the solar charging management scheme of the storage battery of the electric vehicle in the market.
2. According to the invention, the boosting constant current circuit is assisted with the voltage detection circuit, so that MPPT control of the solar panel is realized.
3. The boost constant current circuit is assisted by the uniform floating charge voltage control circuit, so that the uniform floating charge voltage is controlled.
4. The boosting constant current circuit is assisted by the uniform floating charge flow control circuit, so that the uniform floating charge maximum current control is realized.
5. The MPPT control circuit and the storage battery uniform floating charge control circuit are utilized to jointly control the storage battery heating circuit, so that the storage battery is heated by utilizing the redundant output energy of the solar panel in a floating charge state of the storage battery, and the endurance of the storage battery in a low-temperature environment is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
fig. 1 is a schematic circuit diagram of a solar boosting MPPT charge controller with a battery heating function according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The embodiment of the invention provides a solar boosting MPPT charging controller with a storage battery heating function, which comprises the following components: the device comprises a boosting constant current circuit, an MPPT control circuit, a floating charge control circuit and a storage battery heating control circuit; the MPPT control circuit is connected with a voltage output end of the solar panel (namely the solar panel) and is used for detecting and controlling the output voltage of the solar panel; the uniform floating charge control circuit is connected with the storage battery and used for detecting and controlling the uniform floating charge state of the storage battery; the storage battery heating control circuit is respectively connected with the MPPT control circuit, the uniform floating charge control circuit and the solar panel output, and is used for acquiring the output voltage of the solar panel and the uniform floating charge state of the storage battery, heating the storage battery by utilizing the residual output energy of the solar panel when the storage battery is in the floating charge state, and controlling the output voltage of the solar panel to fluctuate near the MPPT point;
in another embodiment, the first capacitor C1 is further included; the first end of the first capacitor C1 is connected with the output plus end of the solar panel; the second terminal of the first capacitor C1 is grounded.
The above-described partial circuits are described in detail below with reference to fig. 1.
1. A battery heating control circuit:
the battery heating control circuit includes: the device comprises a switch S, an epoxy resin heating sheet RT, a fourth switching tube Q4, an AND gate U4, a first voltage detection IC chip U1 and a third voltage detection IC chip U3; the drain electrode of the fourth switching tube Q4 is connected with the second end of the epoxy resin heating sheet RT; the first end of the epoxy resin heating sheet RT is connected with the second end of the switch S; the first end of the switch is connected with the output plus end of the solar panel; the output end of the solar panel is grounded; the source electrode of the fourth switching tube Q4 is grounded; the grid electrode of the fourth switching tube Q4 is connected with a third pin of the AND gate U4; the first pin of the AND gate U4 is connected with the MPPT control circuit, and is particularly connected with the OUT-pin of the first voltage detection IC chip U1 in the MPPT control circuit; the second pin of the AND gate U4 is connected with the uniform floating charge control circuit, and is particularly connected with the OUT-pin of the third voltage detection IC chip U3 in the uniform floating charge control circuit; the battery heating control circuit further includes: a resistor No. R9; the first end of the resistor R9 is connected with the second pin of the AND gate U4; the second end of the ninth resistor R9 is connected with the source electrode of the fourth switching tube Q4;
the user decides whether to turn on the battery heating switch S according to the ambient temperature; when the switch S is turned on, the AND gate U4 outputs a high level after detecting that the storage battery is in a floating charge state and the output voltage of the solar panel is higher than the preset voltage (MPPT point) of the storage battery, and turns on the switch Q4 of the fourth switch to start heating the storage battery. According to different use environments, the circuit can be simply modified, and whether the solar panel outputs energy or not is selected through a switch, so that the storage battery is heated.
2. Boost constant current circuit:
the boost constant current circuit is used for charging a storage battery of the electric bicycle; the circuit comprises: the power-on/off control circuit comprises an inductor L1, a diode D1, a switch tube Q1 and a boost constant-current control IC chip U2; the first end of the inductor L1 is connected with the output plus end of the solar panel; the second end of the inductor L1 is connected with the anode of the diode D1; the drain electrode of the first switching tube Q1 is connected with the second end of the inductor L1; the grid electrode of the first switching tube Q1 is connected with a DRV pin of the boosting constant current control IC chip U2; the source electrode of the first switching tube Q1 is connected with the CS pin of the boosting constant current control IC chip U2; the step-up constant current circuit further includes: a second capacitor C2 and a second current sampling resistor Rs2; the anode of the second capacitor C2 is connected with the cathode of the first diode D1; the negative electrode of the second capacitor C2 is connected with the second end of the second current sampling resistor Rs2 and grounded; the first end of the second current sampling resistor Rs2 is connected with a CS pin of the boosting constant current control IC chip U2; the second terminal of the second current sampling resistor Rs2 is grounded.
3. MPPT control circuit:
the MPPT control circuit includes: a first voltage sampling resistor R1, a second voltage sampling resistor R2, an adjustable resistor R3 and a first voltage detection IC chip U1; the first end of the first voltage sampling resistor R1 is connected with the output plus end of the solar panel; the second end of the first voltage sampling resistor R1 is connected with the first end of the second voltage sampling resistor R2; the second end of the second voltage sampling resistor R2 is connected with the first end of the adjustable resistor R3; the second end of the adjustable resistor R3 is grounded; the pin A of the first voltage detection IC chip U1 is connected with the second end of the first voltage sampling resistor R1 and the first end of the second voltage sampling resistor R2; the pin B of the first voltage detection IC chip U1 is connected with the second end of the second voltage sampling resistor R2 and the first end of the adjustable resistor; the OUT+ pin of the first voltage detection IC chip U1 is connected with the FB pin of the boosting constant current control IC chip U2 through a third diode D3; the OUT-pin of the first voltage detection IC chip U1 is connected with a first pin of an AND gate U4 in the storage battery heating control circuit;
by adjusting the resistance value of the adjustable resistor R3, the fluctuation of the output voltage of the solar panel in a small range near the optimal working voltage point can be accurately set. When the output voltage of the solar panel is smaller than the preset voltage, the OUT+ pin of the first voltage detection IC chip U1 outputs a high level, the high level is sent to the feedback pin of the boost constant current control IC chip U2 through the FB, the boost main loop (namely the boost constant current circuit) stops working, and otherwise, the boost main loop works normally. Before the common load power requirement of the storage battery charging loop and the heating loop exceeds the maximum power which can be provided by the solar panel, the MPPT control circuit can control the output voltage of the solar panel to fluctuate near MPPT, so that the maximum efficiency utilization of the output power of the solar panel is realized;
in the embodiment of the invention, the output of the optimal working voltage point setting loop of the solar panel is sent to the feedback pin of the boost constant current control IC chip U2, and can be sent to other pins such as a chip enabling pin and the like which can control the working of the boost main loop in actual use.
4. And the floating charge control circuit:
the floating charge control circuit comprises: the floating charge voltage control circuit and the floating charge flow control circuit; wherein:
4.1, a uniform floating charge voltage control circuit:
the floating charge voltage control circuit includes: a first voltage stabilizing tube Dz1, a second voltage stabilizing tube Dz2, a third voltage stabilizing tube Dz3, a third switching tube Q3 and a third voltage detection IC chip U3; the negative electrode of the first voltage stabilizing tube Dz1 is connected with the positive end of the storage battery through a second diode D2, wherein the second diode D2 is used for avoiding impact of a charging plug on a sampling control circuit in the plugging process; the positive electrode of the first voltage stabilizing tube Dz1 is connected with the negative electrode of the second voltage stabilizing tube Dz 2; the positive electrode of the second voltage stabilizing tube Dz2 is connected with the negative electrode of the third voltage stabilizing tube Dz 3; the positive electrode of the third voltage stabilizing tube Dz3 is connected with the FB pin of the boosting constant current control IC chip U2 in the source electrode of the third switching tube Q3 and the boosting constant current circuit; the drain electrode of the third switching tube Q3 is connected with the positive electrode of the second voltage stabilizing tube Dz2 and the negative electrode of the third voltage stabilizing tube Dz 3; the grid electrode of the third switching tube Q3 is connected with the OUT-pin of the third voltage detection IC chip U3; the OUT-pin of the third voltage detection IC chip U3 is connected with the second pin of the AND gate U4;
the uniform floating charge voltage control circuit is used for setting the highest uniform charge voltage and floating charge voltage of the storage battery; the first voltage stabilizing tube Dz1, the second voltage stabilizing tube Dz2 and the third voltage stabilizing tube Dz3 can be adapted to different types of storage batteries through combination of different parameters;
the method comprises the steps that a fifth voltage sampling resistor R5, a sixth voltage sampling resistor R6 and a seventh voltage sampling resistor R7 in the uniform floating charge voltage control circuit indirectly detect the voltage of a storage battery, when the voltage of the storage battery is lower than a set uniform floating charge conversion point, the OUT-pin of a third voltage detection IC chip U3 outputs a low level, a third switching tube Q3 is cut off, and at the moment, the uniform charging voltage of the storage battery is determined by a first voltage stabilizing tube Dz1, a second voltage stabilizing tube Dz2 and a third voltage stabilizing tube Dz 3; when the voltage of the storage battery is higher than a set floating charge conversion point, the OUT-pin of the third voltage detection IC chip U3 outputs a high level, the third switching tube Q3 is conducted, and the maximum floating charge voltage of the storage battery is determined by the first voltage stabilizing tube Dz1 and the second voltage stabilizing tube Dz 2;
different boosting constant current control chips have different feedback modes, which are determined by the boosting constant current control chip, and can also feed back by including but not limited to a high-precision resistor series voltage division mode.
4.2, a uniform floating charge flow control circuit:
the float charge flow control circuit includes: a fifth voltage sampling resistor R5, a sixth voltage sampling resistor R6, a seventh voltage sampling resistor R7, a first current sampling resistor Rs1 and a second switching tube Q2; the first end of the fifth voltage sampling resistor R5 is connected with the anode of the second diode D2; the second end of the fifth voltage sampling resistor R5 is respectively connected with the first end of the sixth voltage sampling resistor R6 and the pin A of the third voltage detection IC chip U3; the second end of the sixth voltage sampling resistor R6 is respectively connected with the first end of the seventh voltage sampling resistor R7 and the pin B of the third voltage detection IC chip U3; the second end of the seventh voltage sampling resistor R7 is grounded; the grid electrode of the second switching tube Q2 is connected with an OUT+ pin of the third voltage detection IC chip U3 and is connected with a second end of the seventh voltage sampling resistor R7 through a eighth resistor R8; the drain electrode of the second switching tube Q2 is connected with the FB pin of the boosting constant current control IC chip U2 in the boosting constant current circuit through a fourth resistor; the source electrode of the second switching tube Q2 is connected with the first end of the first current sampling resistor Rs 1; the second end of the first current sampling resistor Rs1 is connected with the drain electrode of the second switching tube Q2 and the storage battery end;
when the voltage of the storage battery is lower than a set floating charge conversion point, the OUT+ pin of the third voltage detection IC chip U3 outputs a high level, the second switching tube Q2 is conducted, and the maximum charging current of the storage battery is determined by the first current sampling resistor Rs1 and the conducting resistance of the second switching tube Q2 together; when the voltage of the storage battery is higher than a set floating charge conversion point, the OUT+ pin of the third voltage detection IC chip U3 outputs a low level, the second switching tube Q2 is closed, and the maximum floating charge current of the storage battery is determined by the first current sampling resistor Rs 1;
aiming at different maximum average charging currents of storage batteries with different capacities, when the on resistance of the second switching tube Q2 is too small, the maximum average charging current of the storage batteries can be reduced in a mode of connecting sampling resistors in series.
In order to avoid excessive repeated jump of the circuit around the optimal working voltage point of the solar panel and the equal floating charge conversion voltage point of the storage battery, the first voltage detection IC chip U1 and the third voltage detection IC chip U3 related to the invention both use voltage detection chips with adjustable hysteresis, and can use common voltage detection ICs in actual use, and only the sampling circuit needs to be simply modified.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (10)

1. Take battery heating function's solar energy MPPT charge controller that steps up, a serial communication port includes: the device comprises a boosting constant current circuit, an MPPT control circuit, a floating charge control circuit and a storage battery heating control circuit;
the MPPT control circuit is connected with the voltage output end of the solar panel and is used for detecting and controlling the output voltage of the solar panel;
the uniform floating charge control circuit is connected with the storage battery circuit and is used for detecting and controlling the uniform floating charge state of the storage battery;
the storage battery heating control circuit is respectively connected with the MPPT control circuit, the uniform floating charge control circuit and the solar panel and is used for acquiring the output voltage of the solar panel and the uniform floating charge state of the storage battery, heating the storage battery by utilizing the residual output energy of the solar panel when the storage battery is in the floating charge state, and controlling the output voltage of the solar panel to fluctuate near the MPPT point.
2. The solar boost MPPT charge controller with battery heating function of claim 1, wherein said battery heating control circuit comprises: the switch, the epoxy resin heating sheet, the fourth switch tube and the AND gate;
the drain electrode of the fourth switching tube is connected with the second end of the epoxy resin heating sheet;
the first end of the epoxy resin heating sheet is connected with the second end of the switch;
the first end of the switch is connected with the output plus end of the solar panel;
the source electrode of the fourth switching tube is grounded;
the grid electrode of the fourth switching tube is connected with the third pin of the AND gate;
the first pin of the AND gate is connected with the MPPT control circuit;
and the second pin of the AND gate is connected with the floating charge control circuit.
3. The solar boost MPPT charge controller with battery heating function of claim 2, wherein said battery heating control circuit further comprises: a resistor nine;
the first end of the ninth resistor is connected with the second pin of the AND gate;
and the second end of the ninth resistor is connected with the source electrode of the fourth switching tube.
4. The solar boost MPPT charge controller with battery heating function of claim 2, wherein said boost constant current circuit comprises: the power supply comprises an inductor, a diode I, a switching tube I and a boosting constant current control IC chip;
the first end of the inductor is connected with the output plus end of the solar panel;
the second end of the inductor is connected with the anode of the first diode;
the drain electrode of the first switching tube is connected with the second end of the inductor;
the grid electrode of the first switching tube is connected with the DRV pin of the boosting constant current control IC chip;
and the source electrode of the first switching tube is connected with the CS pin of the boosting constant current control IC chip.
5. A solar boost MPPT charge controller with battery heating as defined in claim 4, wherein said boost constant current circuit further comprises: a second capacitor and a second current sampling resistor;
the anode of the second capacitor is connected with the cathode of the first diode;
the negative electrode of the second capacitor is connected with the second end of the second current sampling resistor and grounded;
and the first end of the second current sampling resistor is connected with the CS pin of the boosting constant current control IC chip.
6. A solar boost MPPT charge controller with battery heating as defined in claim 4, wherein said MPPT control circuit comprises: a first voltage sampling resistor, a second voltage sampling resistor, an adjustable resistor and a first voltage detection IC chip;
the first end of the first voltage sampling resistor is connected with the output plus end of the solar panel;
the second end of the first voltage sampling resistor is connected with the first end of the second voltage sampling resistor;
the second end of the second voltage sampling resistor is connected with the first end of the adjustable resistor;
the second end of the adjustable resistor is grounded;
the pin A of the first voltage detection IC chip is connected with the second end of the first voltage sampling resistor and the first end of the second voltage sampling resistor;
the pin B of the first voltage detection IC chip is connected with the second end of the second voltage sampling resistor and the first end of the adjustable resistor;
an OUT+ pin of the first voltage detection IC chip is connected with an FB pin of the boosting constant current control IC chip through a third diode;
the OUT-pin of the first voltage detection IC chip is connected with the first pin of the AND gate.
7. The solar boost MPPT charge controller with battery heating function of claim 2, wherein said float control circuit comprises: and the floating charge voltage control circuit and the floating charge flow control circuit.
8. The solar boost MPPT charge controller with battery heating function of claim 7, wherein said float voltage control circuit comprises: a first voltage stabilizing tube, a second voltage stabilizing tube, a third switching tube and a third voltage detection IC chip;
the negative electrode of the first voltage stabilizing tube is connected with the positive end of the storage battery through a second diode;
the positive electrode of the first voltage stabilizing tube is connected with the negative electrode of the second voltage stabilizing tube;
the positive electrode of the second voltage stabilizing tube is connected with the negative electrode of the third voltage stabilizing tube;
the positive electrode of the third voltage stabilizing tube is connected with the FB pin of the boosting constant current control IC chip in the source electrode of the third switching tube and the boosting constant current circuit;
the drain electrode of the third switching tube is connected with the anode of the second voltage stabilizing tube and the cathode of the third voltage stabilizing tube;
the grid electrode of the third switching tube is connected with the OUT-pin of the third voltage detection IC chip;
and the OUT-pin of the third voltage detection IC chip is connected with the second pin of the AND gate.
9. The solar boost MPPT charge controller with battery heating function of claim 8, wherein said float charge flow control circuit comprises: a fifth voltage sampling resistor, a sixth voltage sampling resistor, a seventh voltage sampling resistor, a first current sampling resistor and a second switching tube;
the first end of the fifth voltage sampling resistor is connected with the anode of the second diode;
the second end of the fifth voltage sampling resistor is connected with the first end of the sixth voltage sampling resistor respectively, and the pin A of the third voltage detection IC chip is connected with the second end of the fifth voltage sampling resistor;
the second end of the sixth voltage sampling resistor is connected with the first end of the seventh voltage sampling resistor and the pin B of the third voltage detection IC chip respectively;
the second end of the seventh voltage sampling resistor is grounded;
the grid electrode of the second switching tube is connected with the OUT+ pin of the third voltage detection IC chip and is connected with the second end of the seventh voltage sampling resistor through the eighth resistor;
the drain electrode of the second switching tube is connected with the FB pin of the boosting constant current control IC chip in the boosting constant current circuit through a fourth resistor;
the source electrode of the second switching tube is connected with the first end of the first current sampling resistor;
and the second end of the first current sampling resistor is connected with the drain electrode of the second switching tube and the storage battery end.
10. The solar boost MPPT charge controller with battery heating as recited in claim 2, further comprising a first capacitor;
the first end of the first capacitor is connected with the output plus end of the solar panel;
the second end of the first capacitor is grounded.
CN202310035780.2A 2023-01-10 2023-01-10 Solar boosting MPPT charging controller with storage battery heating function Pending CN116039430A (en)

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Application Number Priority Date Filing Date Title
CN202310035780.2A CN116039430A (en) 2023-01-10 2023-01-10 Solar boosting MPPT charging controller with storage battery heating function

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118137638A (en) * 2024-02-23 2024-06-04 中国铁塔股份有限公司 Method for determining output voltage of light stacking system and electronic equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118137638A (en) * 2024-02-23 2024-06-04 中国铁塔股份有限公司 Method for determining output voltage of light stacking system and electronic equipment

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