CN213185585U

CN213185585U - Constant-current constant-voltage charging circuit with reverse connection prevention and numerical control temperature compensation

Info

Publication number: CN213185585U
Application number: CN202022259602.2U
Authority: CN
Inventors: 楼森燎; 杨红梁
Original assignee: Ningbo Meilei Electric Appliance Co ltd
Current assignee: Ningbo Meilei Electric Appliance Co ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-05-11
Anticipated expiration: 2030-10-12

Abstract

The utility model discloses a take and prevent reverse-connection numerical control temperature compensation constant current constant voltage charging circuit, including the control unit, charge switch unit, constant current constant voltage regulating unit, prevent reverse-connection unit and temperature detecting element, prevent reverse-connection unit and control unit electricity and be connected, constant current constant voltage regulating unit and control unit and prevent reverse-connection unit electricity and be connected, charge switch unit and control unit and constant current constant voltage regulating unit electricity are connected, temperature detecting element is connected with the control unit electricity; the utility model discloses can ensure lead acid battery charge and discharge performance under the different temperature environment, have simultaneously with low costs and the high advantage of reliability.

Description

Constant-current constant-voltage charging circuit with reverse connection prevention and numerical control temperature compensation

Technical Field

The utility model relates to a charging circuit technical field, concretely relates to anti-numerical control temperature compensation constant current constant voltage charging circuit that connects is prevented in area.

Background

The severity of the chemical reaction and the temperature of the battery are closely related when the battery is charged. The higher the battery temperature, the more vigorous the chemical reaction, and the lower the temperature, the more dilute the battery chemical reaction. Therefore, when the temperature of the storage battery is high, the float charge voltage needs to be reduced to slow down the chemical reaction due to the aggravation of the chemical reaction of the battery; when the temperature of the storage battery is low, the chemical reaction is slowed down, and at the moment, the float charging voltage needs to be increased to enhance the chemical reaction so as to ensure the normal conversion of energy.

When the environmental temperature is low, the floating charge voltage is increased, so that a series of problems of increasing floating charge current, accelerating grid corrosion and the like can be caused; when the ambient temperature is high, the float charge voltage is reduced, and a series of problems such as insufficient charging of the storage battery can be formed. Especially for an environment with large environmental temperature variation, this has a great influence on the chemical reaction speed inside the battery. Therefore, the precise adjustment of the constant-current constant-voltage charging parameters is also required to maintain the storage battery at the optimal working temperature as much as possible, so that the capacity of the storage battery can be used to the maximum extent, and the storage battery is not damaged.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a reverse-connection-preventing numerical control temperature compensation constant current constant voltage charging circuit, it can ensure the charge and discharge performance of lead-acid batteries under different temperature environment, has with low costs and the high advantage of reliability simultaneously.

The utility model discloses a take and prevent reverse-connection numerical control temperature compensation constant current constant voltage charging circuit, including the control unit, the switch unit that charges, constant current constant voltage regulating unit, prevent reverse-connection unit and temperature detecting unit, prevent that reverse-connection unit is connected with the control unit electricity, constant current constant voltage regulating unit and the control unit with prevent reverse-connection unit electricity and be connected, the switch unit that charges is connected with the control unit and constant current constant voltage regulating unit electricity, temperature detecting unit is connected with the control unit electricity.

The utility model discloses a reverse numerical control temperature compensation constant current constant voltage charging circuit is prevented connecing in area, wherein, the control unit includes microprocessor MCU, diode D4, electric capacity C9, resistance R26, R27, diode D4's negative pole is connected with power end VDD electricity, diode D4's positive pole is connected with microprocessor MCU electricity, be connected with earthing terminal VSS electricity behind diode D4's the anodal series resistance R27, electric capacity C9 is parallelly connected with resistance R27, be connected with wiring terminal VIN electricity behind diode D4's the anodal series resistance R26.

The utility model discloses a take and prevent joining conversely numerical control temperature compensation constant current constant voltage charging circuit, wherein, prevent that the joining-up prevention unit includes field effect transistor Q8, resistance R13, R89, RH4, RH5, battery interface BAT1, be connected with microprocessor MCU electricity behind field effect transistor Q8's 1 foot series resistance R13, be connected with earthing terminal GND electricity behind field effect transistor Q8's 1 foot series resistance R89, 3 feet and microprocessor MCU electricity of field effect transistor Q8 are connected, battery interface BAT 1's both ends are connected with wiring terminal BT + and 3 feet electricity of field effect transistor Q8 respectively, be connected with earthing terminal CGND electricity behind field effect transistor Q8's 2 feet series resistance RH4, resistance RH5 is parallelly connected with resistance RH 4.

The utility model discloses a take anti-digital control temperature compensation constant current constant voltage charging circuit that connects conversely, wherein, constant current constant voltage regulating unit includes operational amplifier IC2A, IC2B, triode Q9, diode D1, D2, D3, zener diode Z1, Z2, resistance R1, RH1, RH2, RH3, R10, R14, R17, R18, R19, R24, R2, electric capacity CH1, C5; a 5-pin series resistor RH1 of an operational amplifier IC2B is electrically connected with a ground terminal CGND, a 5-pin series resistor R1 of the operational amplifier IC2B is electrically connected with a terminal CH-CC, a 6-pin series resistor RH3 of the operational amplifier IC2B is electrically connected with the ground terminal GND, a 6-pin series capacitor CH1 of the operational amplifier IC2B is electrically connected with the ground terminal CGND, a 7-pin series resistor RH2 of the operational amplifier IC2B is electrically connected with a cathode of a diode D1, an anode of a diode D1 is electrically connected with a 3-pin of the operational amplifier IC2A, a 4-pin of the operational amplifier IC2A is electrically connected with the ground terminal CGND, an 8-pin of the operational amplifier IC2A is electrically connected with a terminal VIN, a 3-pin series resistor R10 of the operational amplifier IC2A is electrically connected with a terminal VIN +, a 3-pin series resistor R18 of the operational amplifier IC2A is electrically connected with the ground terminal CGND, a capacitor C5 is electrically connected with the ground terminal VIN 5 in parallel, a pin of the operational, a 1 pin series resistor R17 of an operational amplifier IC2A is electrically connected with the positive electrode of a diode D3, the negative electrode of a diode D3 is electrically connected with a 3 pin of an operational amplifier IC2A, a 1 pin series resistor R2 of an operational amplifier IC2A is electrically connected with a ground terminal GND, a 1 pin of an operational amplifier IC2A is electrically connected with the negative electrode of a voltage stabilizing diode Z2, a positive electrode series resistor R24 of a voltage stabilizing diode Z2 is electrically connected with the base electrode of a triode Q9, a collector series resistor R19 of a triode Q9 is electrically connected with a power terminal VDD, a collector of a triode Q9 is electrically connected with a microprocessor MCU, an emitter of the triode Q9 is electrically connected with the ground terminal VSS, a positive electrode of the voltage stabilizing diode Z1 is electrically connected with a 1 pin of an operational amplifier IC2A, a negative electrode of the voltage stabilizing diode Z1 is electrically connected with a charging switch unit, a negative electrode terminal of a diode D2 is electrically connected with; and the terminal CH-CC and the terminal CH-SW are electrically connected with the microprocessor MCU.

The utility model discloses a prevent joining conversely numerical control temperature compensation constant current constant voltage charging circuit, wherein, the charge switch unit includes triode Q1, Q6, resistance R6, R7, R8, electric capacity C1, interface J1, DC-IN1, triode Q1's collecting electrode and diode D2's positive pole electricity are connected, behind triode Q1's base series resistance R9 with zener diode Z1's negative pole electricity be connected, electric capacity C1's one end and resistance R9 keep away from triode Q1's one end electricity and be connected, electric capacity C1's the other end and earthing terminal CGND electricity are connected, triode Q6's collecting electrode and triode Q1's base electricity are connected, behind triode Q6's base series resistance R8 with the terminal electricity be connected, triode Q1's projecting pole and VIN electricity are connected, the one end of resistance R6 is connected with VIN terminal electricity, the other end and the 2 feet of interface J1 of resistance R6, interface DC-IN 1's 1 foot and Q6's projecting, the resistor R7 is connected IN parallel with the resistor R6, pin 1 of the interface J1 is electrically connected with the grounding terminal CGND, and pin 2 and pin 3 of the interface DC-IN1 are both electrically connected with the grounding terminal CGND.

The utility model discloses a reverse numerical control temperature compensation constant current constant voltage charging circuit is prevented connecing in area, wherein, the temperature detecting element includes thermistor Rt1, resistance R16, electric capacity C7, resistance R16's one end is connected with power end VDD electricity, resistance R16's the other end is connected with microprocessor MCU electricity, electric capacity C7's one end is connected with earthing terminal VSS electricity, electric capacity C7's the other end is connected with microprocessor MCU electricity, thermistor Rt 1's one end is connected with microprocessor MCU electricity, thermistor Rt 1's the other end is connected with VSS earthing terminal electricity.

The utility model discloses can ensure lead acid battery charge and discharge performance under the different temperature environment, have simultaneously with low costs and the high advantage of reliability.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic circuit diagram of the present invention.

Detailed Description

In the following description, numerous implementation details are set forth in order to provide a more thorough understanding of the present invention. It should be understood, however, that these implementation details should not be used to limit the invention. That is, in some embodiments of the invention, details of these implementations are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for description purposes, not specifically referring to the order or sequence, and are not intended to limit the present invention, but only to distinguish the components or operations described in the same technical terms, and are not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model discloses a take and prevent reverse-connection numerical control temperature compensation constant current constant voltage charging circuit, including the control unit, charge switch unit 1, constant current constant voltage regulating unit 2, prevent reverse-connection unit 3 and temperature detecting element 4, prevent reverse-connection unit 3 and the control unit electricity is connected, constant current constant voltage regulating unit 2 with the control unit with prevent reverse-connection unit 3 electricity and be connected, charge switch unit 1 is connected with the 2 electricity of control unit and constant current constant voltage regulating unit, temperature detecting element 4 is connected with the control unit electricity.

The control unit comprises a microprocessor MCU, a diode D4, a capacitor C9, resistors R26 and R27, wherein the cathode of the diode D4 is electrically connected with a power supply end VDD, the anode of the diode D4 is electrically connected with the microprocessor MCU, the anode of the diode D4 is electrically connected with a ground end VSS after being connected with the resistor R27 in series, the capacitor C9 is connected with a resistor R27 in parallel, and the anode of the diode D4 is electrically connected with a terminal VIN after being connected with the resistor R26 in series.

The reverse connection preventing unit 3 comprises a field effect transistor Q8, resistors R13, R89, RH4 and RH5, a storage battery interface BAT1, a pin 1 of the field effect transistor Q8 is electrically connected with a microprocessor MCU after being connected with a resistor R13 in series, a pin 1 of the field effect transistor Q8 is electrically connected with a ground terminal GND after being connected with a resistor R89 in series, a pin 3 of the field effect transistor Q8 is electrically connected with the microprocessor MCU, two ends of the storage battery interface BAT1 are electrically connected with a pin BT + terminal and a pin 3 of the field effect transistor Q8 respectively, a pin 2 of the field effect transistor Q8 is electrically connected with a ground terminal CGND after being connected with a resistor RH4 in series, and the resistor RH.

The constant-current constant-voltage adjusting unit 2 comprises operational amplifiers IC2A, IC2B, a triode Q9, diodes D1, D2 and D3, voltage-stabilizing diodes Z1 and Z2, resistors R1, RH1, RH2, RH3, R10, R14, R17, R18, R19, R24 and R2, and capacitors CH1 and C5; a 5-pin series resistor RH1 of an operational amplifier IC2B is electrically connected with a ground terminal CGND, a 5-pin series resistor R1 of the operational amplifier IC2B is electrically connected with a terminal CH-CC, a 6-pin series resistor RH3 of the operational amplifier IC2B is electrically connected with the ground terminal GND, a 6-pin series capacitor CH1 of the operational amplifier IC2B is electrically connected with the ground terminal CGND, a 7-pin series resistor RH2 of the operational amplifier IC2B is electrically connected with a cathode of a diode D1, an anode of a diode D1 is electrically connected with a 3-pin of the operational amplifier IC2A, a 4-pin of the operational amplifier IC2A is electrically connected with the ground terminal CGND, an 8-pin of the operational amplifier IC2A is electrically connected with a terminal VIN, a 3-pin series resistor R10 of the operational amplifier IC2A is electrically connected with a terminal VIN +, a 3-pin series resistor R18 of the operational amplifier IC2A is electrically connected with the ground terminal CGND, a capacitor C5 is electrically connected with the ground terminal VIN 5 in parallel, a pin of the operational, a 1 pin series resistor R17 of an operational amplifier IC2A is electrically connected with the positive electrode of a diode D3, the negative electrode of a diode D3 is electrically connected with a 3 pin of an operational amplifier IC2A, a 1 pin series resistor R2 of an operational amplifier IC2A is electrically connected with a ground terminal GND, a 1 pin of an operational amplifier IC2A is electrically connected with the negative electrode of a voltage stabilizing diode Z2, a positive electrode series resistor R24 of a voltage stabilizing diode Z2 is electrically connected with the base electrode of a triode Q9, a collector series resistor R19 of a triode Q9 is electrically connected with a power terminal VDD, a collector of a triode Q9 is electrically connected with a microprocessor MCU, an emitter of the triode Q9 is electrically connected with the ground terminal VSS, a positive electrode of the voltage stabilizing diode Z1 is electrically connected with a 1 pin of the operational amplifier IC2A, a negative electrode of the voltage stabilizing diode Z1 is electrically connected with a charging switch unit 1, a negative electrode of a diode D2 is electrically connected with a BT; and the terminal CH-CC and the terminal CH-SW are electrically connected with the microprocessor MCU.

The charging switch unit 1 comprises transistors Q1 and Q6, resistors R6, R7 and R8, a capacitor C1, an interface J1 and a DC-IN1, wherein a collector of the transistor Q1 is electrically connected to an anode of the diode D2, a base of the transistor Q2 is electrically connected to a cathode of the zener diode Z2 after being connected IN series with the resistor R2, one end of the capacitor C2 is electrically connected to one end of the resistor R2 away from the transistor Q2, the other end of the capacitor C2 is electrically connected to a ground terminal CGND, a collector of the transistor Q2 is electrically connected to a base of the transistor Q2, the base of the transistor Q2 is electrically connected to the terminal VIN after being connected IN series with the resistor R2, an emitter of the transistor Q2 is electrically connected to the terminal VIN, one end of the resistor R2 is electrically connected to the VIN terminal, the other end of the resistor R2 is electrically connected to a 2 pin of the interface J2, a 1 pin of the interface DC-IN 2 and an emitter of the transistor Q2, the resistor R,

pins

2 and 3 of interface DC-IN1 are both electrically connected to ground CGND.

The temperature detection unit 4 comprises a thermistor Rt1, a resistor R16 and a capacitor C7, wherein one end of the resistor R16 is electrically connected with a power supply end VDD, the other end of the resistor R16 is electrically connected with the microprocessor MCU, one end of the capacitor C7 is electrically connected with a ground end VSS, the other end of the capacitor C7 is electrically connected with the microprocessor MCU, one end of the thermistor Rt1 is electrically connected with the microprocessor MCU, and the other end of the thermistor Rt1 is electrically connected with the ground end VSS; the thermistor Rt1 in the above is attached to the same shell as the storage battery, so as to achieve the purpose of sensing the temperature of the environment where the storage battery is located in real time.

The utility model discloses a theory of operation is: a charging power supply is connected from a charging switch unit, at the moment, a field effect transistor Q8 is turned on, the microprocessor MCU completes the starting of charging self-checking and the detection of the ambient temperature, and during charging, the microprocessor MCU outputs CH-SW and CH-CC control signals to turn on a triode Q1; the microprocessor MCU can detect the ambient temperature around the storage battery in real time through the thermistor Rt1, and can adjust the values of CH-SW and CH-CC in real time according to different ambient temperatures to enable the charging curve to be close to the ideal curve when the storage battery is charged.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides a take anti-numerical control temperature compensation constant current constant voltage charging circuit that connects which characterized in that: the temperature detection device comprises a control unit, a charging switch unit (1), a constant-current and constant-voltage adjusting unit (2), an anti-reverse connection unit (3) and a temperature detection unit (4), wherein the anti-reverse connection unit (3) is electrically connected with the control unit, the constant-current and constant-voltage adjusting unit (2) is electrically connected with the control unit and the anti-reverse connection unit (3), the charging switch unit (1) is electrically connected with the control unit and the constant-current and constant-voltage adjusting unit (2), and the temperature detection unit (4) is electrically connected with the control unit.

2. The anti-reverse-connection-type numerical control temperature compensation constant-current constant-voltage charging circuit with the function of the constant voltage, according to the claim 1, is characterized in that the control unit comprises a microprocessor MCU, a diode D4, a capacitor C9 and resistors R26 and R27, wherein the cathode of the diode D4 is electrically connected with a power supply end VDD, the anode of the diode D4 is electrically connected with the microprocessor MCU, the anode of the diode D4 is electrically connected with a ground end VSS after being connected with the resistor R27 in series, the capacitor C9 is connected with a resistor R27 in parallel, and the anode of the diode D4 is electrically connected with a terminal VIN after being connected with the resistor R26.

3. The constant current and constant voltage charging circuit with the reverse connection prevention function and the numerical control temperature compensation function is characterized in that the reverse connection prevention unit (3) comprises a field effect transistor Q8, resistors R13, R89, RH4 and RH5 and a storage battery interface BAT1, wherein a pin 1 of the field effect transistor Q8 is electrically connected with a microprocessor MCU after being connected with a resistor R13 in series, a pin 1 of the field effect transistor Q8 is electrically connected with a ground terminal GND after being connected with a resistor R89 in series, a pin 3 of the field effect transistor Q8 is electrically connected with the microprocessor MCU, two ends of the storage battery interface BAT1 are respectively electrically connected with a terminal + and a pin 3 of the field effect transistor Q8, a pin 2 of the field effect transistor Q8 is electrically connected with the ground terminal CGND after being connected with a resistor RH4 in parallel, and the resistor RH4 are connected.

4. The anti-reverse-connection-equipped numerical control temperature compensation constant-current constant-voltage charging circuit according to claim 3, wherein the constant-current constant-voltage adjusting unit (2) comprises operational amplifiers IC2A, IC2B, a triode Q9, diodes D1, D2, D3, voltage-stabilizing diodes Z1, Z2, resistors R1, RH1, RH2, RH3, R10, R14, R17, R18, R19, R24, R2, capacitors CH1, C5; a 5-pin series resistor RH1 of the operational amplifier IC2B is electrically connected to a ground terminal CGND, a 5-pin series resistor R1 of the operational amplifier IC2B is electrically connected to a terminal CH-CC, a 6-pin series resistor RH3 of the operational amplifier IC2B is electrically connected to a ground terminal GND, a 6-pin series capacitor CH1 of the operational amplifier IC2B is electrically connected to a ground terminal CGND, a 7-pin series resistor RH2 of the operational amplifier IC2B is electrically connected to a negative electrode of a diode D1, a positive electrode of the diode D1 is electrically connected to a 3-pin of an operational amplifier IC2A, a 4-pin of the operational amplifier IC2A is electrically connected to a ground terminal CGND, an 8-pin of the operational amplifier IC2A is electrically connected to a terminal VIN, a 3-pin series resistor R10 of the operational amplifier IC2A is electrically connected to a terminal BT +, a 3-pin series resistor R A is electrically connected to a ground terminal CGND 18, and a capacitor C5 is electrically connected to a ground terminal CGND in parallel, a 2 pin series resistor R14 of the operational amplifier IC2A is electrically connected with a terminal CH-SW, a 1 pin series resistor R17 of the operational amplifier IC2A is electrically connected with the anode of a diode D3, the cathode of a diode D3 is electrically connected with a 3 pin of an operational amplifier IC2A, a 1 pin series resistor R2 of the operational amplifier IC2A is electrically connected with a ground terminal GND, a 1 pin of the operational amplifier IC2A is electrically connected with the cathode of a zener diode Z2, the anode series resistor R24 of the zener diode Z2 is electrically connected with the base of a transistor Q9, the collector series resistor R19 of the transistor Q9 is electrically connected with the power terminal VDD, the collector of the transistor Q9 is electrically connected with a microprocessor MCU, the emitter of the transistor Q9 is electrically connected with a ground terminal VSS, the anode of the zener diode Z1 is electrically connected with a 1 pin of the operational amplifier IC2A, and the cathode of the zener diode Z1 is electrically connected with a charging switch unit (1), the cathode of the diode D2 is electrically connected with a terminal BT +, and the anode of the diode D2 is electrically connected with a charging switch unit (1); and the terminal CH-CC and the terminal CH-SW are electrically connected with the microprocessor MCU.

5. The anti-reverse-connection-prevention numerical control temperature compensation constant-current constant-voltage charging circuit according to claim 4, wherein the charging switch unit (1) comprises transistors Q1 and Q6, resistors R6, R7 and R8, a capacitor C1, an interface J1 and a DC-IN1, a collector of the transistor Q1 is electrically connected with a positive electrode of a diode D2, a base of the transistor Q1 is electrically connected with a negative electrode of a zener diode Z1 after being connected IN series with a resistor R9, one end of the capacitor C1 is electrically connected with one end of the resistor R9 far away from the transistor Q1, the other end of the capacitor C1 is electrically connected with a grounding terminal CGND, a collector of the transistor Q6 is electrically connected with a base of a transistor Q1, a base of the transistor Q6 is electrically connected with a resistor R8 after being connected IN series with the resistor R8, an emitter of the transistor Q1 is electrically connected with a VIN, one end of the resistor R6 is electrically connected with a terminal VIN, and the other end, Pin 1 of the interface DC-IN1 is electrically connected to an emitter of the transistor Q6, the resistor R7 is connected IN parallel to the resistor R6, pin 1 of the interface J1 is electrically connected to a ground terminal CGND, and pins 2 and 3 of the interface DC-IN1 are both electrically connected to the ground terminal CGND.

6. The constant current and constant voltage charging circuit with the reverse connection prevention function and the numerical control temperature compensation function according to claim 5, wherein the temperature detection unit (4) comprises a thermistor Rt1, a resistor R16 and a capacitor C7, one end of the resistor R16 is electrically connected with a power supply terminal VDD, the other end of the resistor R16 is electrically connected with the microprocessor MCU, one end of the capacitor C7 is electrically connected with a ground terminal VSS, the other end of the capacitor C7 is electrically connected with the microprocessor MCU, one end of the thermistor Rt1 is electrically connected with the microprocessor MCU, and the other end of the thermistor Rt1 is electrically connected with the ground terminal VSS.