WO2024067696A1

WO2024067696A1 - Automobile startup power source and automobile startup apparatus

Info

Publication number: WO2024067696A1
Application number: PCT/CN2023/122021
Authority: WO
Inventors: 谢燕琳
Original assignee: 谢燕琳
Priority date: 2022-09-28
Filing date: 2023-09-27
Publication date: 2024-04-04
Also published as: CN115596590A

Abstract

An automobile startup power source and an automobile startup apparatus. The automobile startup power source comprises a power source battery circuit (11), a load access detection circuit (12), a startup control circuit (13), a switch circuit (14) and output ports, wherein the power source battery circuit comprises a power source battery (111), the output ports comprise a positive output port (16) and a negative output port (15), and the switch circuit comprises a switch device; the power source battery circuit is connected to both the load access detection circuit and the startup control circuit, and the load access detection circuit is connected to the startup control circuit; the positive output port is connected to a positive electrode of the power source battery; the switch device is connected to the negative output port and a negative electrode of the power source battery, and the switch device is used for controlling the connection between the negative output port and the power source battery; and the negative output port is connected to an input end of the load access detection circuit, and an input end of the startup control circuit is connected to an output end of the load access detection circuit.

Description

Automobile starting power supply and automobile starting device

Technical Field

The present invention relates to the field of automobiles, and more particularly to an automobile starting power supply and an automobile starting device. This application is based on a Chinese invention patent application filed on September 28, 2022, with application number CN202211193100.1, the contents of which are incorporated herein by reference.

Background technique

Cars need batteries for ignition to start the vehicle. When the battery is exhausted, it cannot ignite normally, causing inconvenience to travel. Car starting power supply can be connected to the battery as an emergency power supply to help the vehicle ignite and start when the vehicle is stalled and the battery is exhausted and cannot ignite.

Existing automobile starting power supplies can be implemented through pure hardware circuits, but such automobile starting power supplies often sample the voltage of the output positive port for the circuits of various modules. For example, the Chinese utility model patent with announcement number CN216709232U discloses a portable backup starting device and backup starting tool for a vehicle. The load access detection module of this solution needs to use two operational amplifiers to realize the realization of voltage load and resistance load, which is relatively complex in structure. In addition, the device cannot realize the detection of load falling off from the wire clamp and the detection of relay adhesion, and is not safe and reliable enough.

technical problem

The first object of the present invention is to provide a vehicle starting power supply with a simpler structure.

A second object of the present invention is to provide a vehicle starting device comprising the above-mentioned vehicle starting power supply.

Technical Solutions

In order to achieve the above-mentioned first purpose, the present invention provides an automobile starting power supply, which includes: a power battery circuit, a load access detection circuit, a starting control circuit, a switch circuit and an output port, the power battery circuit includes a power battery, the output port includes an output positive port and an output negative port, and the switch circuit includes a switch device; the power battery circuit is respectively connected to the load access detection circuit and the starting control circuit, and the load access detection circuit is connected to the starting control circuit; the output positive port is connected to the positive electrode of the power battery; the switch device is connected to the output negative port and the negative electrode of the power battery, and the switch device is used to control the connection between the output negative port and the power battery; the output negative port is connected to the input end of the load access detection circuit, and the output end of the starting control circuit is connected to the input end of the load access detection circuit; the load access detection circuit is used to detect whether a target load is connected between the output positive port and the output negative port, and when it is detected that the target load is not connected, the load access detection circuit prohibits the output end of the starting control circuit from outputting a target electrical signal for controlling the switching device to be turned on; when the load access detection circuit detects that the target load is connected, the load access detection circuit controls the output end of the starting control circuit to output the target electrical signal for controlling the switching device to be turned on to the switch circuit.

A further solution is that the load access detection circuit includes a first operational amplifier; when the load access detection module detects that the target load is connected, the non-inverting input terminal of the first operational amplifier obtains a first voltage signal from the output negative port, the output terminal of the first operational amplifier outputs a second voltage signal to the start control circuit, the start control circuit outputs the target electrical signal, and the non-inverting input terminal of the first operational amplifier receives the target electrical signal.

A further solution is that the automobile starting power supply includes a short circuit reverse connection detection circuit, which is respectively connected to the power battery circuit, the starting control circuit and the output port; the short circuit reverse connection detection circuit includes a second operational amplifier; the inverting input terminal of the second operational amplifier receives a third voltage signal from the output positive port, and the non-inverting input terminal of the second operational amplifier receives a fourth voltage signal from the output negative port; when the output positive port is short-circuited with the output negative port, or the target load is reversely connected between the output positive port and the output negative port, the output terminal of the second operational amplifier outputs a fifth voltage signal to prohibit the output terminal of the starting control circuit from outputting the target electrical signal to control the conduction of the switching device to the switching circuit.

A further solution is that the automobile starting power supply includes an automobile battery voltage detection circuit, which is respectively connected to the power battery circuit, the starting control circuit and the output port; the automobile battery voltage detection circuit includes a third operational amplifier and a fourth operational amplifier; the inverting input terminal of the third operational amplifier receives a sixth voltage signal from the output negative port, and the non-inverting input terminal of the third operational amplifier receives a seventh voltage signal from the output positive port; the inverting input terminal of the fourth operational amplifier obtains an eighth voltage signal from the power battery circuit, and the non-inverting input terminal of the fourth operational amplifier obtains a ninth voltage signal from the output terminal of the third operational amplifier; when the target load is a car battery and the car battery is positively connected between the output positive port and the output negative port and the voltage of the car battery is greater than a first preset value, the output terminal of the fourth operational amplifier outputs a tenth voltage signal to prohibit the output terminal of the starting control circuit from outputting the target electrical signal for controlling the conduction of the switching device to the switching circuit.

A further solution is that the automobile starting power supply includes a reverse charging detection circuit, which is respectively connected to the power battery circuit, the starting control circuit, the output port and the automobile battery voltage detection circuit; the reverse charging detection circuit includes a fifth operational amplifier; the non-inverting input terminal of the fifth operational amplifier obtains a ninth voltage signal from the output terminal of the third operational amplifier, and the inverting input terminal of the fifth operational amplifier obtains an eleventh voltage signal from the output positive port; when the target load is a car battery and the car battery is positively connected between the output positive port and the output negative port and the difference between the voltage of the car battery and the voltage of the power battery is greater than a second preset value, the output terminal of the fifth operational amplifier outputs a twelfth voltage signal to prohibit the output terminal of the starting control circuit from outputting the target electrical signal for controlling the conduction of the switching device to the switching circuit.

A further solution is that the automobile starting power supply includes a power battery voltage detection circuit, which is respectively connected to the power battery circuit, the starting control circuit and the output port; the battery voltage detection circuit includes a sixth operational amplifier and a voltage regulator; the non-inverting input terminal of the sixth operational amplifier obtains a thirteenth voltage signal from the power battery circuit, and the inverting input terminal of the sixth operational amplifier obtains a fourteenth voltage signal from the output positive port; the control terminal of the voltage regulator obtains a fifteenth voltage signal from the power battery circuit, and the reference terminal of the voltage regulator obtains a sixteenth voltage signal from the output positive port; when the voltage of the power battery is less than a third preset value, the output terminal of the sixth operational amplifier outputs a seventeenth voltage signal to prohibit the output terminal of the starting control circuit from outputting a target electrical signal to control the conduction of the switch device to the switch circuit; when the voltage of the power battery is greater than a fourth preset value, the control terminal of the voltage regulator outputs an eighteenth voltage signal to prohibit the output terminal of the starting control circuit from outputting a target electrical signal to control the conduction of the switch device to the switch circuit.

A further solution is that the power battery voltage detection circuit is connected to the switch circuit, and when the switch device is turned on, the power battery voltage detection circuit obtains a nineteenth voltage signal from the switch circuit.

The output terminal of the sixth operational amplifier is prohibited from outputting the seventeenth voltage signal.

A further solution is that the switching device is a relay, and the automobile starting power supply includes a relay sticking detection circuit, which is respectively connected to the output negative port, the starting control circuit and the power battery circuit; the relay sticking detection circuit is used to obtain a twentieth voltage signal from the output negative port when the load access detection circuit detects that the target load is connected and the relay is stuck, and output a twenty-first voltage signal to prohibit the output end of the starting control circuit from outputting the target electrical signal for controlling the conduction of the switching device to the switching circuit.

A further solution is that the relay sticking detection circuit includes a first transistor, the base of the first transistor obtains a twentieth voltage signal from the output negative port, and when the load connection detection circuit detects that the target load is connected and the relay is stuck, the first transistor is cut off, and the collector of the first transistor outputs a twenty-first voltage signal to prohibit the output end of the start-up control circuit from outputting the target electrical signal to control the conduction of the switching device to the switching circuit.

In order to achieve the above second purpose, the present invention provides a vehicle starting device, including a housing and a wire clamp, wherein the housing is connected to the wire clamp, wherein the housing includes the above vehicle starting power supply.

Beneficial Effects

The present invention samples the voltage signal of the negative output port through the load access detection module. On the basis of realizing the automobile starting power supply through pure hardware, the detection of the resistive load and the voltage load can be realized through an operational amplifier at the same time, making the volume of the present invention more concise and compact. In addition, the target electrical signal of the conducting switch device is multiplexed, and the target electrical signal is simultaneously transmitted to the load access detection module, the output of the load access detection module is maintained, and the detection of load shedding is realized, and the structure is more reasonable and reliable.

The present invention synchronously detects the short circuit and reverse connection states of the automobile starting power supply through the short circuit and reverse connection detection circuit, without the need to separate different circuits for detection respectively, and directly uses the voltage signal of the output positive terminal as the bias power supply of the sampling circuit, which can save the setting of an additional bias power supply circuit.

The automobile battery voltage detection circuit of the present invention directly uses the positive and negative electrodes of the power battery for power supply, and has a simpler structure.

The present invention directly uses the positive and negative electrodes of the power battery to supply power, and has a simpler structure.

The present invention can also prevent the power supply battery voltage from malfunctioning when the relay is normally attracted.

The present invention can also realize relay adhesion detection and protect the automobile starting power supply.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of an embodiment of an automobile starting power supply of the present invention.

FIG. 2 is a circuit diagram of a power supply battery circuit of an embodiment of the automobile starting power supply of the present invention.

FIG. 3 is a circuit schematic diagram of the connection between a load access detection circuit and a relay adhesion detection circuit in an embodiment of the automobile starting power supply of the present invention.

FIG. 4 is a circuit diagram of a starting control circuit of an embodiment of an automobile starting power supply of the present invention.

FIG. 5 is a circuit schematic diagram of a switch circuit connected to an output port of an embodiment of the automobile starting power supply of the present invention.

FIG6 is a circuit schematic diagram showing the connection between the short circuit reverse connection detection circuit, the reverse charge detection circuit, and the automobile battery voltage detection circuit of the automobile starting power supply embodiment of the present invention.

FIG. 7 is a circuit diagram of a power battery voltage detection circuit of an embodiment of the automobile starting power supply of the present invention.

FIG. 8 is a circuit diagram of a temperature detection circuit of an embodiment of the automobile starting power supply of the present invention.

FIG. 9 is a circuit diagram of a timing circuit of an embodiment of the automobile starting power supply of the present invention.

FIG. 10 is a circuit diagram of an alarm circuit of an embodiment of a vehicle starting power supply of the present invention.

FIG. 11 is a circuit diagram of an indicator circuit of an embodiment of the automobile starting power supply of the present invention.

The present invention is further described below in conjunction with the accompanying drawings and embodiments.

Best Mode for Carrying Out the Invention

The load access detection module of the automobile starting power supply of the present invention samples the voltage signal from the negative output port, thereby synchronously realizing the detection of the voltage load and the resistance load. The present invention also provides an automobile starting device including the above automobile starting power supply. It should be noted that the automobile starting power supply of the present invention is realized by a pure hardware circuit, and does not involve software control methods such as MCU (Microcontroller Unit) sampling.

Car starting power supply implementation example:

Referring to FIG. 1 , the automobile starting power supply of this embodiment includes a power battery circuit 11, a load connection detection circuit 12, a starting control circuit 13, a switch circuit 14, an output port, a short circuit reverse connection detection circuit 17, an automobile battery voltage detection circuit 18, a reverse charge detection circuit 19, a power battery voltage detection circuit 20, a relay adhesion detection circuit 21, a temperature detection circuit 22, a timing circuit 23, an alarm circuit 24, and an indication circuit 25. The power battery circuit 11 includes a power battery 111 and a DC-DC circuit 112. The output port includes an output negative electrode port 15 and an output positive electrode port 16. The switch circuit 14 includes a switch device (not shown in the figure).

The power battery circuit 11 is connected to the load access detection circuit 12 and the start control circuit 13 respectively, and the load access detection circuit 12 is connected to the start control circuit 13. The output positive terminal 16 is connected to the positive terminal of the power battery 111. The switch device is connected to the output negative terminal 15, and is used to control the connection between the output negative terminal 15 and the negative terminal of the battery unit 111.

The load input detection circuit 12 is used to detect whether the target load is connected between the output positive terminal 16 and the output negative terminal 15. When it is detected that the target load is not connected, the load connection detection circuit 12 prohibits the output end of the startup control circuit 13 from outputting the target electrical signal for controlling the conduction of the switch device, so that the negative pole of the power battery 111 cannot be correctly connected to the output negative terminal 15. When the load connection detection circuit 12 detects that the target load is connected, the load connection detection circuit 12 controls the output end of the startup control circuit 13 to output the target electrical signal for controlling the conduction of the switch device, so that the negative pole of the power battery 111 is correctly connected to the output negative terminal 15, so that the positive and negative poles of the power battery 111 are correctly connected to the target load. The target load of this embodiment is a car battery. It can be understood that the target load can also be other electronic devices of the car.

The power battery circuit 11 is used to supply power to the target load correctly connected between the output negative electrode port 15 and the output positive electrode port 16, and to supply power to other functional modules of the startup control circuit of this embodiment. Referring to FIG2 , the power battery circuit of this embodiment includes a power battery J1 and a DC-DC circuit, the DC-DC circuit includes a first diode D1, a third resistor R3, a voltage stabilizing chip U1, a first capacitor C1, an eighteenth capacitor C18, a fourth capacitor C4, a second capacitor C2, and a third capacitor C3, the voltage VDD and the voltage V+ are used to provide voltage to other functional modules of the startup control circuit of this embodiment (such as the operational amplifiers of each functional module), VIN1 is connected to the output positive electrode port P1, and GND1 is connected to the output negative electrode port P2.

3 , the load connection detection circuit 12 includes a first operational amplifier IC2A, a 30th resistor R30, a 32nd resistor R32, a 33rd resistor R33, a 38th resistor R38, a 19th diode D19, a 21st diode D21 and a 9th capacitor C9.

4 , the start-up control circuit 13 includes a fifty-sixth resistor R56, a fifty-eighth resistor R58, a fifty-ninth resistor R59, a sixtieth resistor R90, a sixty-seventh resistor R67, a NE555 timer IC4, a twenty-eighth diode D28, a twenty-ninth diode D29, a fifteenth transistor Q15, a thirteenth capacitor C13, a fourteenth capacitor C14, and a seventeenth capacitor C17.

Referring to FIG5 , the switch circuit 14 includes a tenth resistor R10, an eleventh resistor R11, a third triode Q3, a fifth diode D5, and a relay K1. The relay K1 is used as a switch device to connect the output negative electrode port P2 and the ground terminal. The output positive electrode port P1 is connected to the positive electrode of the power supply battery. It can be understood that the switch device can also be a field effect tube, etc.

Therefore, it is not necessary to implement resistive load detection and voltage load detection through different operational amplifiers. When a resistive load is connected between the output positive port P1 and the output negative port P2 (for example, when no car battery is connected, the electronic device of the car connected between the output positive port P1 and the output negative port P2 is equivalent to a resistor, such as a car battery with zero voltage) or a voltage load (for example, a car battery with a non-zero voltage), the non-inverting input terminal of the first operational amplifier IC2A of the load connection detection circuit receives the first voltage signal from the output negative port P2, so that the voltage of the non-inverting input terminal of the first operational amplifier IC2A is greater than the voltage of the inverting input terminal of the first operational amplifier IC2A, so that the output terminal level of the first operational amplifier IC2A is flipped from a low level to a high level. The voltage level of the first transistor Q15 of the start control circuit is changed to a high level, that is, the second voltage signal is output to the start control circuit, so that the 15th transistor Q15 of the start control circuit is turned on, and the oscillation circuit composed of the 59th resistor, the 60th resistor, and the 13th capacitor C13 starts to oscillate, so that the third foot of the NE555 timer IC4 outputs a square wave signal of a preset period. The high level in the square wave signal is the target electrical signal. The target electrical signal is input to the switch circuit, so that the third transistor Q3 of the switch circuit is turned on, and then the relay K1 is pulled in, and the negative electrode of the power battery is connected to the output negative electrode port P2 through the relay K1, and the target load between the output positive electrode port P1 and the output negative electrode port P2 is powered. If the target load is a car battery, the car can be ignited. When the relay K1 is pulled in, since the output end of the start control circuit is connected to the input end of the load access detection circuit, the high level output of the first operational amplifier IC2A is maintained by the target electrical signal. During the duration of the square wave signal, when the output of the third pin of the NE555 timer IC4 is converted from a high level to a low level, the third transistor Q3 is turned off, and after the relay K1 is disconnected for the duration of the low level, if the load access detection circuit does not detect the access of the voltage load or the resistive load at this time, that is, the non-inverting input terminal of the first operational amplifier IC2A cannot receive the first voltage signal from the output negative electrode port P2, then the first operational amplifier IC2A outputs a low level, thereby causing the fifteenth transistor Q15 to be turned off, the twenty-ninth diode D29 to be forward-conducted, the oscillation circuit to stop oscillating, the third pin of the NE555 timer IC4 to output a low level, the third transistor Q3 is turned off, and the relay K1 is no longer closed, thereby realizing the function of detecting whether the connected voltage load or resistive load is detached from the output positive electrode port P1 and the output negative electrode port P2, and disconnecting the relay K1 in time when the detachment occurs.

Continuing to refer to FIG3 , the relay adhesion detection circuit 21 is respectively connected to the output cathode port, the start-up control circuit and the power battery circuit. The relay adhesion detection circuit 21 is used to obtain the twentieth voltage signal from the output cathode port P2 when the load access detection circuit 12 detects that the load is connected and the relay is stuck at the same time, and output the twenty-first voltage signal to prohibit the output end of the start-up control circuit from outputting the target electrical signal for controlling the relay to be turned on to the switch circuit. As an optional embodiment, the relay adhesion detection circuit 21 includes a first transistor Q14, a sixty-fourth resistor R64, a twelfth capacitor C12, a sixty-first resistor R61, a twenty-fifth diode D25, a thirteenth transistor Q13, a twenty-sixth diode D26, a twenty-seventh diode D27, a sixty-sixth resistor R66, and a sixteenth capacitor 104. When the load connection detection circuit 12 detects that the load is connected and the relay is stuck, the first transistor Q13 obtains the 20th voltage signal from the output negative electrode port P2 and is cut off, and the collector of the first transistor Q13 outputs the 21st voltage signal to prohibit the output end of the start control circuit from outputting the target electrical signal for controlling the relay K1 to be turned on to the switch circuit. Even if the car battery is connected between the output positive electrode port P1 and the output negative electrode port P2, the output end of the start control circuit is not output to control the target electrical signal for controlling the switch device to be turned on to the switch circuit.

The short circuit reverse connection detection circuit 17 is respectively connected to the power battery circuit 11, the start control circuit 13 and the output port. Referring to FIG6 , the short circuit reverse connection detection circuit 17 includes a seventy-second resistor R72, a forty-third resistor R43, a thirty-sixth resistor R36, a second operational amplifier IC2B, a twenty-first capacitor 21, a seventeenth diode D17, a sixty-second resistor R62, a fourth resistor R4, a fifth resistor R5, a sixteenth transistor Q16, a sixth resistor R6, a first field effect transistor Q1, a first resistor R1, and a second resistor R2. The inverting input terminal of the second operational amplifier IC2B receives the third voltage signal from the output positive electrode port P1, and the non-inverting input terminal of the second operational amplifier IC2B receives the fourth voltage signal from the output negative electrode port P2. When the output positive electrode port P1 is short-circuited with the output negative electrode port P2, or the car battery is reversely connected between the output positive electrode port P1 and the output negative electrode port P2, the output terminal of the second operational amplifier IC2B outputs the fifth voltage signal to turn on the twelfth transistor Q13, thereby prohibiting the output terminal of the start control circuit from outputting the target electrical signal for controlling the relay K1 to turn on to the switch circuit. Even if the car battery is connected between the output positive electrode port P1 and the output negative electrode port P2, the output terminal of the start control circuit does not output the target electrical signal for controlling the switch device to turn on to the switch circuit.

The car battery voltage detection circuit 18 is connected to the power battery circuit 11, the start control circuit 13 and the output port respectively. Referring to FIG6 , the car battery voltage detection circuit 11 includes a third operational amplifier IC3C, a fourth operational amplifier IC3D, a 46th resistor R46, a 47th resistor R47, a 45th resistor R45, a 35th resistor R35, a 20th capacitor C20, a 69th resistor R69, a 70th resistor R70, a 50th resistor R50, a 29th resistor R29, a 53rd resistor R53, a first voltage regulator ZD1, an 11th diode D11 and a 23rd diode D23. The inverting input terminal of the third operational amplifier IC3C receives the sixth voltage signal from the output negative electrode port P2, and the non-inverting input terminal of the third operational amplifier IC3C receives the seventh voltage signal from the output positive electrode port P1. The sixth voltage signal and the seventh voltage signal are differentially amplified to obtain a fixed ninth voltage signal. Since the car battery is positively connected between the output positive electrode port P1 and the output negative electrode port P2, the ninth voltage signal can be used to represent the voltage of the car battery. The inverting input terminal of the fourth operational amplifier IC3D obtains the eighth voltage signal from the power battery circuit, and the non-inverting input terminal obtains the ninth voltage signal from the output terminal of the third operational amplifier IC3C. Since the value of the eighth voltage signal can be adjusted to be set to the first preset value, the first preset value represents the maximum threshold value allowed by the voltage of the car battery, the fourth operational amplifier IC3D compares the eighth voltage signal with the ninth voltage signal. When the ninth voltage signal is greater than the first preset value, the output terminal of the fourth operational amplifier IC3D outputs a high-level tenth voltage signal, and the tenth voltage signal turns on the twelfth transistor Q12, thereby prohibiting the output terminal of the start control circuit from outputting the target electrical signal for controlling the relay K1 to turn on to the switch circuit. Even if the car battery is connected between the output positive terminal P1 and the output negative terminal P2, the target electrical signal for controlling the output terminal of the start control circuit to output the control device to turn on is not output to the switch circuit. Since the reverse charge detection circuit 19 directly uses the positive and negative poles of the power battery for power supply, the structure is simpler and the loss of the DC-DC circuit is reduced.

The reverse charge detection circuit is connected to the power battery circuit, the start control circuit, the output port and the car battery voltage detection circuit respectively. Referring to FIG6 , the reverse charge detection circuit includes a fifth operational amplifier IC3A, a fifty-fifth resistor R55, a fifty-seventh resistor R57, a twenty-second diode D22, a sixty-third resistor R63 and a sixty-fifth resistor R65. The in-phase input terminal of the fifth operational amplifier IC3A obtains the ninth voltage signal from the output terminal of the third operational amplifier, and the inverting input terminal of the fifth operational amplifier IC3A obtains the eleventh voltage signal from the output positive electrode port P1. Since the value of the eleventh voltage signal can also be adjusted to be set to the second preset value, the second preset value is used to represent the voltage of the power battery. The fifth operational amplifier IC3A compares the ninth voltage signal with the eleventh voltage signal. When the car battery is positively connected between the output positive electrode port P1 and the output negative electrode port P2 and the voltage of the car battery is greater than the voltage of the power battery, the output terminal of the fifth operational amplifier IC3A outputs the twelfth voltage signal to turn on the twelfth transistor Q12, thereby prohibiting the output terminal of the start control circuit from outputting the target electrical signal for controlling the relay K1 to turn on to the switch circuit. Even if the car battery is connected between the output positive terminal P1 and the output negative terminal P2, the output terminal of the startup control circuit does not output the target electrical signal for controlling the switching device to conduct to the switching circuit. Since the reverse charge detection circuit directly uses the positive and negative electrodes of the power battery for power supply, the structure is simpler and the loss of the DC-DC circuit is reduced.

The power battery voltage detection circuit is connected to the power battery circuit, the start-up control circuit and the output port respectively. Referring to FIG7 , the battery voltage detection circuit includes a sixth operational amplifier IC2C, a voltage regulator IC1, a fourth transistor Q4, a seventh resistor R7, a fifteenth resistor D15, a sixth capacitor C6, a twenty-fifth resistor R25, a fifteenth diode D15, a twenty-third resistor R23, a seventeenth resistor R17, a thirteenth resistor R13, a twenty-fourth resistor R24, a twelfth resistor R12, a twenty-sixth resistor R26, a third diode D3, a tenth diode D10, and a ninth diode D9.

The in-phase input terminal of the sixth operational amplifier IC2C obtains the thirteenth voltage signal from the power battery circuit, and the inverting input terminal of the sixth operational amplifier IC2C obtains the fourteenth voltage signal from the output positive electrode port P1. The sixth operational amplifier IC2C compares the thirteenth voltage signal with the fourteenth voltage signal. When the voltage of the power battery is less than the third preset value, which represents the minimum threshold value of the voltage of the power battery, the output terminal of the sixth operational amplifier IC2C outputs the seventeenth voltage signal of a high level to turn on the twelfth transistor Q12, thereby prohibiting the output terminal of the start control circuit from outputting the target electrical signal for controlling the relay K1 to turn on to the switch circuit. Even if the car battery is connected between the output positive electrode port P1 and the output negative electrode port P2, the output terminal of the start control circuit does not output the target electrical signal for controlling the switch device to turn on to the switch circuit.

The control end of the voltage regulator IC1 obtains the fifteenth voltage signal from the power battery circuit, and the reference end ref of the voltage regulator IC1 obtains the sixteenth voltage signal from the output positive electrode port P1. When the voltage of the power battery is greater than the fourth preset value, the fourth preset value represents the maximum threshold of the voltage of the power battery, and the control end K of the voltage regulator IC1 outputs a low level to turn on the fourth transistor Q4, and the output end outputs a high level seventeenth voltage signal to turn on the twelfth transistor Q12, thereby turning on the twelfth transistor Q12, thereby prohibiting the output end of the start control circuit from outputting the target electrical signal for controlling the relay K1 to turn on to the switch circuit. Even if the car battery is connected between the output positive electrode port P1 and the output negative electrode port P2, the output end of the start control circuit does not output the target electrical signal for controlling the switching device to turn on to the switch circuit.

The battery voltage detection circuit 18 is also connected to the switch circuit 14. When the switch device is turned on, the battery voltage detection circuit 18 obtains the nineteenth voltage signal, namely the UVP signal, from the switch circuit 14, thereby pulling down the output of the output terminal of the sixth operational amplifier IC2C, so that when the relay K1 is normally turned on, the power battery low voltage protection function is disabled to prevent normal ignition due to the power battery voltage being too low during the ignition operation.

Referring to FIG8 , the temperature detection circuit 22 includes a seventh operational amplifier IC2D, a sixteenth resistor R16, a twenty-seventh resistor R27, an eighteenth resistor R18, an eighth resistor R8, a nineteenth resistor R19, a twenty-first resistor R21, a temperature sensor NTC1, an eighth diode D8, a sixth diode D6, a thirteenth diode D13, a second transistor Q2, a fifth transistor Q5, a fifth capacitor C5, and a seventh capacitor C7. When the temperature sensor detects that the temperature of NTC1 is too high, the voltage of the inverting input terminal of the seventh operational amplifier IC2D becomes low, and the output terminal of the seventh operational amplifier IC2D outputs a high level, which turns on the twelfth transistor Q12 through the eighth diode D8, thereby prohibiting the output terminal of the start control circuit from outputting the target electrical signal for controlling the relay K1 to turn on to the switch circuit. Even if the car battery is connected between the output positive terminal P1 and the output negative terminal P2, the output terminal of the start control circuit does not output the target electrical signal for controlling the switch device to turn on to the switch circuit.

Referring to FIG9 , the timing circuit 23 includes an eighth operational amplifier IC2B, a fifty-second resistor R52, a seventy-first resistor R71, a twentieth resistor R20, an eighth capacitor C8, a nineteenth capacitor C19, a fourteenth diode D14, a twentieth diode D20, a seventh diode D7, and a twelfth diode D12. When the load access detection circuit 12 detects that the car battery is connected, the inverting input terminal of the eighth operational amplifier IC2B charges the eighth capacitor C8. When the voltage of the inverting input terminal is higher than the non-inverting input terminal, the output terminal of the eighth operational amplifier IC2B outputs a low-level voltage to the start control circuit 13, thereby prohibiting the output terminal of the start control circuit 13 from outputting the target electrical signal for controlling the relay K1 to conduct to the switch circuit. Thus, the power supply to the car battery can be automatically disconnected.

Referring to FIG. 10 , the alarm circuit 24 includes a ninth resistor R9, a buzzer BZ1, a fourth diode D4, a sixth transistor Q6 and a seventeenth transistor Q17. When the vehicle starting power supply has an erroneous operating condition such as reverse connection, short circuit, reverse charging, or overtemperature, the sixth transistor Q6 obtains a high-level signal to turn on the sixth transistor Q6 and then causes the buzzer BZ1 to alarm, alerting the user.

11 , the indicating circuit 25 includes a first LED lamp LED1, a 40th resistor R40, a second LED lamp LED2, a 41st resistor R41, a 39th resistor R39, a 42nd resistor R42, an 18th resistor R48, a 31st resistor R31, a 34th resistor R34, a 51st resistor R41, an 8th transistor Q8, a 9th transistor Q9, a 10th transistor Q10, an 11th transistor Q11, an 18th diode D18, a 24th diode D24, a 31st diode D31, a 10th capacitor C10 and an 11th capacitor C11. When the vehicle starting power supply has an erroneous operating condition such as reverse connection, short circuit, reverse charging, or overtemperature, the stop signal is a high-level signal, the base of the 9th transistor Q9 is cut off, the 8th transistor Q8 and the 10th transistor Q10 are turned on, and the first LED lamp LED1 is lit. When the relay K1 is normally energized, the transistor of the eleventh transistor Q11 is at a high level, the eighth transistor Q8 is cut off, the eighth transistor Q8 and the eleventh transistor Q11 are turned on, and the second LED lamp LED2 is lit.

Automobile starting device embodiment:

The automobile starting device of this embodiment includes a shell and a wire clamp, the shell is connected to the wire clamp, and the shell includes the automobile starting power supply described in the automobile starting power supply embodiment. During actual use, the wire clamp is clamped at the two poles of the automobile battery to perform the ignition operation.

In summary, the present invention samples the voltage signal of the negative output port through the load access detection module, so that the detection of the resistive load and the voltage load can be realized simultaneously through an operational amplifier. On the basis of using pure hardware to realize the automobile starting power supply, the volume of the present invention is more concise and compact, the target electrical signal of the conducting switch device is multiplexed, and the target electrical signal is synchronously transmitted to the load access detection module, and the output of the load access detection module is maintained, so that the structure is more reasonable and reliable. The present invention also provides an automobile starting device including the above-mentioned automobile starting power supply.

Industrial Applicability

The automobile starting power supply and automobile starting device of the present invention are suitable for the automobile field. Through the setting of a power battery circuit, a load access detection circuit, a starting control circuit, a switch circuit and an output port, on the basis of realizing the automobile starting power supply in pure hardware, the detection of a resistive load and a voltage load is realized simultaneously through an operational amplifier, the target electrical signal of the conducting switch device is multiplexed, and the target electrical signal is simultaneously transmitted to the load access detection module, the output of the load access detection module is maintained, and the detection of load shedding is realized. The voltage signal of the output positive electrode port is directly used as the bias power supply of the sampling circuit to save the setting of an additional bias power supply circuit. The overall structure is compact and the implementation is simple.

Claims

A car starting power supply, characterized by comprising:

A power battery circuit, a load access detection circuit, a start-up control circuit, a switch circuit and an output port, wherein the power battery circuit includes a power battery, the output port includes an output positive electrode port and an output negative electrode port, and the switch circuit includes a switch device;

The power battery circuit is connected to the load access detection circuit and the startup control circuit respectively, and the load access detection circuit is connected to the startup control circuit;

The output positive electrode port is connected to the positive electrode of the power battery; the switch device is connected to the output negative electrode port and the negative electrode of the power battery, and the switch device is used to control the connection between the output negative electrode port and the power battery;

The output cathode port is connected to the input end of the load connection detection circuit, and the output end of the start control circuit is connected to the input end of the load connection detection circuit;

The load access detection circuit is used to detect whether a target load is connected between the output positive port and the output negative port. When it is detected that the target load is not connected, the load access detection circuit prohibits the output end of the start control circuit from outputting a target electrical signal for controlling the conduction of the switching device; when the load access detection circuit detects that the target load is connected, the load access detection circuit controls the output end of the start control circuit to output a target electrical signal for controlling the conduction of the switching device to the switching circuit.
The automobile starting power supply as claimed in claim 1 is characterized in that:

The load access detection circuit includes a first operational amplifier;

When the load access detection module detects that the target load is connected, the non-inverting input terminal of the first operational amplifier obtains a first voltage signal from the output negative port, the output terminal of the first operational amplifier outputs a second voltage signal to the startup control circuit, the startup control circuit outputs the target electrical signal, and the non-inverting input terminal of the first operational amplifier receives the target electrical signal.
The automobile starting power supply as claimed in claim 1 is characterized in that:

The automobile starting power supply comprises a short circuit reverse connection detection circuit, wherein the short circuit reverse connection detection circuit is respectively connected to the power battery circuit, the starting control circuit and the output port; the short circuit reverse connection detection circuit comprises a second operational amplifier;

The inverting input terminal of the second operational amplifier receives a third voltage signal from the output positive port, and the non-inverting input terminal of the second operational amplifier receives a fourth voltage signal from the output negative port; when the output positive port is short-circuited with the output negative port, or the target load is reversely connected between the output positive port and the output negative port, the output terminal of the second operational amplifier outputs a fifth voltage signal to prohibit the output terminal of the startup control circuit from outputting the target electrical signal to control the conduction of the switching device to the switching circuit.
The automobile starting power supply as claimed in claim 1 is characterized in that:

The automobile starting power supply comprises an automobile battery voltage detection circuit, wherein the automobile battery voltage detection circuit is respectively connected to the power battery circuit, the starting control circuit and the output port; the automobile battery voltage detection circuit comprises a third operational amplifier and a fourth operational amplifier;

The inverting input terminal of the third operational amplifier receives a sixth voltage signal from the output negative electrode port, and the non-inverting input terminal of the third operational amplifier receives a seventh voltage signal from the output positive electrode port;

The inverting input terminal of the fourth operational amplifier obtains an eighth voltage signal from the power battery circuit, and the non-inverting input terminal of the fourth operational amplifier obtains a ninth voltage signal from the output terminal of the third operational amplifier;

When the target load is a car battery and the car battery is directly connected between the output positive port and the output negative port and the voltage of the car battery is greater than a first preset value, the output end of the fourth operational amplifier outputs a tenth voltage signal to prohibit the output end of the startup control circuit from outputting a target electrical signal to control the conduction of the switching device to the switching circuit.
The automobile starting power supply as claimed in claim 4 is characterized in that:

The automobile starting power supply comprises a reverse charging detection circuit, wherein the reverse charging detection circuit is respectively connected to the power battery circuit, the starting control circuit, the output port and the automobile battery voltage detection circuit; the reverse charging detection circuit comprises a fifth operational amplifier;

The non-inverting input terminal of the fifth operational amplifier obtains the ninth voltage signal from the output terminal of the third operational amplifier, and the inverting input terminal of the fifth operational amplifier obtains the eleventh voltage signal from the output positive terminal;

When the target load is a car battery and the car battery is connected between the output positive port and the output negative port and the difference between the voltage of the car battery and the voltage of the power battery is greater than a second preset value, the output end of the fifth operational amplifier outputs a twelfth voltage signal to prohibit the output end of the startup control circuit from outputting a target electrical signal to control the conduction of the switching device to the switching circuit.
The automobile starting power supply as claimed in claim 1 is characterized in that:

The automobile starting power supply comprises a power battery voltage detection circuit, wherein the power battery voltage detection circuit is respectively connected to the power battery circuit, the starting control circuit and the output port; the battery voltage detection circuit comprises a sixth operational amplifier and a voltage stabilizing source;

The non-inverting input terminal of the sixth operational amplifier obtains a thirteenth voltage signal from the power battery circuit, and the inverting input terminal of the sixth operational amplifier obtains a fourteenth voltage signal from the output positive electrode port; the control terminal of the voltage stabilizing source obtains a fifteenth voltage signal from the power battery circuit, and the reference terminal of the voltage stabilizing source obtains a sixteenth voltage signal from the output positive electrode port;

When the voltage of the power battery is less than the third preset value, the output terminal of the sixth operational amplifier outputs a seventeenth voltage signal to prohibit the output terminal of the startup control circuit from outputting a target electrical signal for controlling the switching device to be turned on to the switching circuit;

When the voltage of the power battery is greater than a fourth preset value, the control end of the voltage stabilizing source outputs an eighteenth voltage signal to prohibit the output end of the startup control circuit from outputting a target electrical signal to control the conduction of the switch device to the switch circuit.
The automobile starting power supply as claimed in claim 6 is characterized in that:

The power battery voltage detection circuit is connected to the switch circuit. When the switch device is turned on, the power battery voltage detection circuit obtains the nineteenth voltage signal from the switch circuit to prohibit the output end of the sixth operational amplifier from outputting the seventeenth voltage signal.
The automobile starting power supply as described in any one of claims 1 to 7 is characterized in that:

The switch device is a relay.
The automobile starting power supply as claimed in claim 8 is characterized in that:

The automobile starting power supply comprises a relay sticking detection circuit, and the relay sticking detection circuit is respectively connected to the output cathode port, the starting control circuit and the power battery circuit;

The relay sticking detection circuit is used to obtain a twentieth voltage signal from the output negative port and output a twenty-first voltage signal to prohibit the output end of the start control circuit from outputting a target electrical signal to the switch circuit to control the conduction of the switch device when the load access detection circuit detects that the target load is connected and the relay is stuck.
The automobile starting power supply as claimed in claim 9 is characterized in that:

The relay sticking detection circuit includes a first transistor, the base of which obtains the 20th voltage signal from the output negative port. When the load access detection circuit detects that the target load is connected and the relay is stuck, the first transistor is cut off, and the collector of the first transistor outputs the 21st voltage signal to prohibit the output end of the start control circuit from outputting the target electrical signal to control the conduction of the switching device to the switching circuit.
The automobile starting power supply as claimed in claim 5 is characterized in that:

The automobile starting power supply comprises a temperature detection circuit, and the temperature detection circuit is connected to the reverse charge detection circuit and the battery voltage detection circuit.
The automobile starting power supply as claimed in claim 1 is characterized in that:

The automobile starting power supply comprises a timing circuit, and the timing circuit is connected to the starting control circuit.
The automobile starting power supply as claimed in claim 12 is characterized in that:

The automobile starting power supply comprises an alarm circuit, and the alarm circuit is connected to the timing circuit.
The automobile starting power supply as claimed in claim 13 is characterized in that:

The automobile starting power supply comprises an indication circuit, and the indication circuit is connected to the alarm circuit.
A car starting device, comprising a housing and a wire clamp, wherein the housing is connected to the wire clamp, and is characterized in that:

The housing includes the automobile starting power supply according to any one of claims 1 to 14.