Circuit structure, power supply device and cable

Abstract

The invention discloses a circuit structure, power supply equipment and a cable. The circuit structure comprises a switch module, a first charging capacitor and a control switch unit. The switch module is used for controlling the energy storage group to be connected or disconnected with the output port. The first charging capacitor is used for generating a first detection voltage according to the duration of a target driving voltage, and the target driving voltage is used for driving the switch module to be connected. And when the duration of the target driving voltage is greater than the preset duration, the control switch unit controls the switch module to be turned off based on the first detection voltage. The communication time of the energy storage group and the output port is controlled through the hardware circuit, compared with software control, control of the hardware circuit is more stable, and the possibility that a starting power supply is reversely charged by an automobile battery is reduced.

Description

Technical Field

[0001] The present invention relates to a circuit delay control technology, and more specifically, to a circuit structure, a power supply device and a cable. Background Art

[0002] The starting power supply provides power to the car battery by connecting to the car battery. When the starting power supply is connected to the car battery for a long time, the car battery may reverse charge the starting power supply. In the related art, the smart battery clamp needs to be controlled by microcontroller programming. The software runs not fast enough and may fail during operation, which will increase the possibility of reverse charging of the car battery to the starting power supply. Summary of the invention

[0003] The embodiments of the present invention provide a circuit structure, a power supply device and a cable, which can solve the problem of reverse charging of a starting power supply by a car battery due to software operation.

[0004] An embodiment of the present invention provides a circuit structure, which is used to control the connection and disconnection of an energy storage group and an output port, and the output port is used to connect a target power supply system, and the target power supply system includes at least one of a starter and a car battery. The circuit structure includes a switch module, a first charging capacitor, and a control switch unit. Among them, the switch module is used to control the connection or disconnection of the energy storage group and the output port. The first charging capacitor is used to generate a first detection voltage according to the duration of a target drive voltage, and the target drive voltage is used to drive the switch module to connect. When the duration of the target drive voltage is greater than a preset duration, the control switch unit controls the switch module to turn off based on the first detection voltage.

[0005] In some embodiments, the first charging capacitor is used to charge after the target driving voltage is used to drive the switch module to be connected, so as to generate the first detection voltage.

[0006] In some embodiments, when the duration of the target driving voltage is greater than a preset duration, the first detection voltage is greater than a first preset voltage, so that the control switch unit controls the switch module to turn off.

[0007] In some embodiments, the control switch unit includes a switch tube, the emitter of the switch tube is used to access the target drive voltage, the base of the switch tube is used to access the first detection voltage, and the collector of the switch tube is connected to the switch module. When the duration of the target drive voltage is greater than a preset duration, the first detection voltage causes the switch tube to be disconnected, the base and collector of the switch tube are disconnected, so that the switch module stops accessing the target drive voltage, and the switch module is disconnected.

[0008] In some embodiments, the circuit structure further includes a power-on delay circuit, which is used to detect the power-on time of the energy storage group and output the target driving voltage after the power-on time of the energy storage group reaches a preset time.

[0009] In some embodiments, the power-on delay circuit includes a detection circuit. The detection circuit is used to detect the power-on time of the energy storage group to generate a second detection voltage, and the power-on delay circuit is specifically used to output the target drive voltage to charge the first charging capacitor when the second detection voltage is greater than a second preset voltage.

[0010] In some embodiments, the power-on delay circuit further includes a comparator. A first input terminal of the comparator is used to access the second preset voltage, a second input terminal of the comparator is used to access the second detection voltage, and the comparator is used to output the target drive voltage when the second detection voltage is greater than the second preset voltage to charge the first charging capacitor.

[0011] In some embodiments, the detection circuit further includes a second charging capacitor, and the second charging capacitor is used to charge after the energy storage group is powered on to generate the second detection voltage.

[0012] In some embodiments, after the power-on time of the energy storage group reaches a preset time, the second detection voltage is greater than the second preset voltage.

[0013] In some embodiments, the circuit structure further includes a driving circuit, the driving circuit is connected to the switch module, and when the control switch unit controls the switch module to turn off, the driving circuit is disconnected to disconnect the switch module. When the control switch unit controls the switch module to close, the driving circuit can drive the switch module to close.

[0014] In some embodiments, the circuit structure further includes an overcurrent detection circuit for detecting a load current flowing from the energy storage group to the output port. When the current value of the load current is greater than a preset current value, the control switch unit controls the switch module to turn off, so as to control the switch module to turn off, so that the energy storage group is disconnected from the output port.

[0015] In some embodiments, the circuit structure further includes an anti-reverse connection circuit, which is used to detect the voltage of the target power supply system to detect the connection state between the output port and the target power supply system. When the connection state between the output port and the target power supply system is reverse connection or short circuit, the control switch unit controls the switch module to turn off, so as to control the switch module to turn off, so that the energy storage group is disconnected from the output port.

[0016] In some embodiments, the circuit structure further includes a power-on switch, and the power-on switch can be used to control the connection and disconnection between the energy storage group and the output port.

[0017] An embodiment of the present invention provides a power supply device, which includes a housing and a circuit structure according to any one of the above embodiments, wherein the circuit structure is arranged in the housing.

[0018] An embodiment of the present invention provides a cable, which includes a shell and a circuit structure of any one of the above-mentioned embodiments, wherein the circuit structure is arranged in the shell, and the output port includes a first clamp and a second clamp, and the first clamp and the second clamp are used to connect to the target power supply system; the cable also includes a pluggable interface, and the pluggable interface is used to pluggably connect to the energy storage group.

[0019] In the circuit structure, power supply device and cable of the embodiment of the present invention, the first detection voltage can reflect the duration of the target driving voltage, and the duration of the target driving voltage can reflect the connection time of the switch module. When the duration of the target driving voltage is greater than the preset duration, the first detection voltage will be within a preset range. When the first detection voltage is within this preset range, it can be considered that the duration of the target driving voltage is greater than the preset duration. The control switch unit can control the switch module to disconnect when the first detection voltage is within this preset range, thereby realizing the disconnection between the energy storage group and the output port, that is, realizing the function of automatically disconnecting the switch module after reaching the preset time. In this way, the working time of the switch module closure is controlled, and the connection time of the energy storage group and the output port can be avoided to be too long. In this way, the time for the energy storage group and the output port to be connected can be controlled by the hardware circuit, which can avoid the connection time of the energy storage group and the output port to be too long. The operation speed is faster than that of software control, and the possibility of reverse charging of the car battery to the starting power supply is reduced.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a connection diagram of the energy storage group, circuit structure and output port according to an embodiment of the present invention;

[0023] Figure 2 is a circuit schematic diagram of a circuit structure of an embodiment of the present invention;

[0024] Figure 3 It is a connection diagram of a power-on delay circuit, an anti-reverse connection circuit, an overcurrent detection circuit, a power-on switch and a voltage stabilizing circuit according to an embodiment of the present invention;

[0025] Figure 4 is a circuit schematic diagram of a circuit structure of an embodiment of the present invention;

[0026] Figure 5 is a circuit schematic diagram of a circuit structure of an embodiment of the present invention;

[0027] Figure 6 is a schematic diagram of a power supply device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] The starting power supply provides power to the car battery by connecting to the car battery. When the starting power supply is connected to the car battery for a long time, the car battery may reverse charge the starting power supply. In the related art, the smart battery clamp needs to be controlled by microcontroller programming. The software runs not fast enough and may fail during operation, which will increase the possibility of reverse charging of the car battery to the starting power supply.

[0030] See also Figure 1 An embodiment of the present invention provides a circuit structure 100, which is used to control the on-off of an energy storage group and an output port, and the output port is used to connect a target power supply system, and the target power supply system includes at least one of a starter and a car battery.

[0031] The circuit structure 100 includes a switch module 30, a first charging capacitor 10 and a control switch unit 20. The switch module 30 is used to control the energy storage group to be connected or disconnected with the output port. The first charging capacitor 10 is used to generate a first detection voltage according to the duration of the target driving voltage, and the target driving voltage is used to drive the switch module 30 to be connected. When the duration of the target driving voltage is greater than the preset duration, the control switch unit 20 controls the switch module 30 to be turned off based on the first detection voltage.

[0032] Specifically, see Figure 2 , the switch module 30 may include a relay S1. The energy storage group includes at least one of a battery group and a capacitor group, the battery group may be a lithium battery group, and the positive and negative electrodes of the energy storage group may be Figure 2The output port is used to connect to the target power supply system, which includes at least one of the starter and the car battery. The positive and negative electrodes of the output port can be Figure 2 CAR+ and CAR- in.

[0033] The target driving voltage can drive the relay S1 in the switch module 30 to close, so that the switch module 30 is connected. The control switch unit 200 can control the switch module 30. When the duration of the target driving voltage is greater than the preset duration, the control switch unit 20 controls the switch module 30 to turn off based on the first detection voltage.

[0034] The first charging capacitor 10 can be charged according to the duration of the target driving voltage to generate a corresponding first detection voltage, so the value of the first detection voltage can reflect the duration of the target driving voltage. During one operation, the duration of the target driving voltage is less than the preset duration. At this time, the target driving voltage can drive the switch module 30 to turn on, and the energy storage group is connected to the output port. When the duration of the target driving voltage is greater than the preset duration, the first detection voltage generated by the first charging capacitor 10 causes the control switch unit 20 to control the switch module 30 to turn off, and the energy storage group is disconnected from the output port.

[0035] Furthermore, the first charging capacitor 10 can be Figure 2 The first charging capacitor 10 can be connected to the control switch unit 20 through the resistor R6. The holding time of the target driving voltage can be reflected by the voltage of the capacitor CE2. The longer the holding time of the target driving voltage is, the greater the charging voltage of the capacitor CE2 is, that is, the greater the first detection voltage is. The resistor R6 can be set to 10KΩ, the capacitor CE2 can be set to 470UF, and the preset duration is set to about 30S. The preset duration can also be changed by setting the parameters of the resistor R6 and the capacitor CE2.

[0036] In this way, when the duration of the target driving voltage is greater than the preset duration, the control switch unit 20 controls the switch module 30 to disconnect based on the first detection voltage, thereby realizing the disconnection between the energy storage group and the output port, that is, realizing the function of the switch module 30 automatically disconnecting after reaching the preset time. In this way, the working time of the switch module 30 closing is controlled, and the connection time between the energy storage group and the output port can be avoided to be too long. In this way, the time when the energy storage group and the output port are connected can be controlled by the hardware circuit, which can avoid the connection time between the energy storage group and the output port to be too long. Compared with the operation speed of software control, it is faster and reduces the possibility of the car battery charging the starting power supply reversely.

[0037] In some embodiments, the first charging capacitor 10 is used to charge after the target driving voltage is used to drive the switch module 30 to be connected, so as to generate a first detection voltage.

[0038] Specifically, the first charging capacitor 10 can be charged according to the closing time of the switch module 30 to generate a corresponding first detection voltage, so the value of the first detection voltage can reflect the closing time of the switch module 30 .

[0039] Reference Figure 2 When the switch module 30 is closed, the target driving voltage charges the capacitor CE2 through the diode D3 and the resistor R3. The longer the switch module 30 is closed, the longer the target driving voltage charges the capacitor CE2, and the greater the voltage of the capacitor CE2, that is, the greater the first detection voltage.

[0040] In this way, when the closing time of the switch module 30 is greater than the preset duration, the control switch unit 20 controls the switch module 30 to open based on the first detection voltage, thereby realizing the disconnection between the energy storage group and the output port, that is, realizing the function of automatically disconnecting the switch module 3030 after reaching the preset time.

[0041] Further, in some embodiments, when the duration of the target driving voltage is greater than a preset duration, the first detection voltage is greater than a first preset voltage, so that the control switch unit 20 controls the switch module 30 to turn off.

[0042] Specifically, the first preset voltage may be a threshold voltage for controlling the switch unit 20 to control the switch module 30 to turn off. The longer the target driving voltage is maintained, the greater the charging voltage of the first charging capacitor 10, that is, the greater the first detection voltage. When the first detection voltage is greater than the first preset voltage, the switch unit controls the switch module 30 to turn off.

[0043] In some embodiments, the control switch unit 20 includes a switch tube, the emitter of the switch tube is used to access the target driving voltage, the base of the switch tube is used to access the first detection voltage, and the collector of the switch tube is connected to the switch module 30. When the duration of the target driving voltage is greater than the preset duration, the first detection voltage disconnects the switch tube, the base and the collector of the switch tube are disconnected, so that the switch module 30 stops accessing the target driving voltage, and the switch module 30 is disconnected.

[0044] Specifically, the switch tube can be Figure 2 The transistor Q2, the resistor R6 and the capacitor CE2 are connected in series between the base of the transistor Q2 and the ground, and the target driving voltage is connected to the emitter of the transistor Q2 through the resistor R3 and the diode D3.

[0045] When the transistor Q2 is closed, the target drive voltage is connected to the base of the transistor Q1 through the transistor Q2, so that the relay S1 in the switch module 30 is closed and the switch module 30 is connected. The target drive voltage also charges the capacitor CE2 through the transistor Q1 and the resistor R6. The longer the target drive voltage is maintained, the greater the charging voltage of the capacitor CE2, the greater the first detection voltage, and the greater the voltage connected to the base of the transistor Q2.

[0046] When the target driving voltage is maintained for a time greater than a preset duration, the voltage connected to the base of the transistor Q2 is large enough to turn off the transistor Q2, and the emitter and collector of the transistor Q2 are disconnected. When the emitter and collector of the transistor Q2 are disconnected, the target driving voltage cannot be connected to the base of the transistor Q1 through the transistor Q2, so that the relay S1 in the switch module 30 is disconnected, and the switch module 30 is turned off.

[0047] In some embodiments, the circuit structure 100 further includes a power-on delay circuit 40, which is used to detect the power-on time of the energy storage group and output a target driving voltage to charge the first charging capacitor 10 after the power-on time of the energy storage group reaches a preset time.

[0048] Specifically, the power-on delay circuit 40 can be a delay circuit composed of discrete devices and arithmetic units. When the output port is connected to the target power supply system, it takes a delay period of time to output the corresponding target drive voltage, and the target drive voltage is connected to the transistor Q2 through the diode D3 and the resistor R3 to charge the capacitor CE2.

[0049] After the energy storage group is powered on for a preset time, the power-on delay circuit 40 outputs the target drive voltage through the emitter of the transistor Q2. During one operation, the target drive voltage first turns on the transistor Q2, the switch module 30 turns on, and the capacitor CE2 is charged at the same time. As the target drive voltage is maintained for a longer time, the voltage of the capacitor CE2 increases, and the base voltage of the transistor Q2 increases, until the voltage difference between the emitter voltage and the base of the transistor Q2 is less than the turn-on voltage, the transistor Q2 turns from on to off, so that the emitter and collector of the transistor Q2 are disconnected, and the target drive voltage cannot be connected to the switch module 30, and the switch module 30 is disconnected.

[0050] In this way, the power-on delay circuit 40 realizes the power-on delay function, avoids the switch module 30 from closing too early, saves the energy transmitted from the energy storage group to the output port, and avoids the problem of sparks generated when connected to the target power supply system.

[0051] In some embodiments, the power-on delay circuit 40 includes a detection circuit, which is used to detect the power-on time of the energy storage group to generate a second detection voltage. The power-on delay circuit 40 is specifically used to output a target drive voltage to charge the first charging capacitor 10 when the second detection voltage is greater than a second preset voltage.

[0052] Specifically, the detection circuit can detect the power-on time of the energy storage group to generate a corresponding second detection voltage, so the value of the second detection voltage can reflect the power-on time of the energy storage group. During one operation, when the detection circuit just detects that the energy storage group is powered on, the power-on time of the energy storage group is less than the preset time, and the power-on delay circuit 40 does not output the target drive voltage. When the power-on time of the energy storage group is greater than the preset time, the generated second detection voltage reaches the reference voltage, and the detection circuit outputs the target drive voltage to charge the first charging capacitor 10.

[0053] In this way, the power-on time of the energy storage group is reflected according to the second detection voltage, and the output of the target driving voltage is controlled according to the size of the second detection voltage. The target driving voltage is output after the power-on time of the energy storage group reaches the preset time, thereby realizing the power-on delay function.

[0054] In some embodiments, the first input terminal of the comparator is used to connect to the second preset voltage, and the second input terminal of the comparator is used to connect to the second detection voltage. The comparator is used to output a target drive voltage to charge the first charging capacitor 10 when the second detection voltage is greater than the second preset voltage.

[0055] Specifically, the detection circuit may include Figure 2 In the comparator U1A, the 5V power supply terminal is grounded through the resistor R9 and the resistor R10, the first input terminal of the comparator is, for example, the negative input terminal, and the second input terminal of the comparator is, for example, the positive input terminal. The first input terminal of the comparator U1A is connected to the divided voltage of the resistor R10, which is the second preset voltage. The second input terminal of the comparator U1A is connected to the second detection voltage. When the second detection voltage is greater than the reference voltage, the comparator outputs the target drive voltage (the target drive voltage is, for example, a high level), and is connected to the emitter of the transistor Q2 through the diode D3 and the resistor R3, so that the transistor Q2 is turned on and the switch module 30 is turned on. When the second detection voltage is less than the reference voltage, the comparator outputs a low level and the diode D3 is turned off. The size of the reference voltage can be set by setting the resistance values ​​of the resistors R9 and R10.

[0056] In this way, by using the comparator, a high or low level can be output according to the comparison result between the second detection voltage and the reference voltage, and the target driving voltage can be output when the second detection voltage is greater than the reference voltage.

[0057] In some embodiments, the detection circuit further includes a second charging capacitor, and the second charging capacitor is used to charge after the energy storage group is powered on to generate a second detection voltage.

[0058] Specifically, see Figure 2 , the second voltage-dividing resistor R7 is connected in series with the second charging capacitor C3. After the energy storage group is powered on, the voltage value of the second charging capacitor C3 increases, so that the voltage of the positive input terminal (second input terminal) of the comparator U1A rises from 0V, that is, the second detection voltage rises from 0V. The longer the time after the energy storage group is powered on, the greater the value of the second detection voltage.

[0059] After the energy storage group is powered on, the second charging capacitor C3 is charged, so that the voltage of the positive input terminal (second input terminal) of the comparator U1A becomes larger, thereby detecting the power-on time of the energy storage group. The longer the time after the energy storage group is powered on, the longer the charging time of the second charging capacitor C3, the larger the voltage of the second charging capacitor C3, and the larger the corresponding second detection voltage. In one embodiment, the energy storage group outputs a 5V voltage after powering on, and the second charging capacitor C3 in the detection circuit is charged, so that the voltage of the positive input terminal (second input terminal) of the comparator U1A rises from 0V to 5V, that is, the second detection voltage rises from 0V to 5V.

[0060] In this way, the second detection voltage can be determined by the charging circuit formed by the second voltage-dividing resistor and the second charging capacitor, so that the second detection voltage can represent the time after the energy storage group is powered on.

[0061] In some embodiments, the circuit structure 100 also includes a driving circuit, which is connected to the switch module 30. When the control switch unit 20 controls the switch module 30 to turn off, the driving circuit is disconnected so that the switch module 30 is disconnected; when the control switch unit 20 controls the switch module 30 to close, the driving circuit can drive the switch module 30 to close.

[0062] Specifically, the driving circuit may include: Figure 2 When the transistor Q2 is turned on, the target driving voltage is connected to the base of the transistor Q1, so that the transistor Q1 is turned on, thereby turning on the relay S1 in the switch module 30, and achieving the effect of driving the switch module 30 to close. When the transistor Q2 is turned off, the base of the transistor Q1 is connected to a low level, the transistor Q1 is turned off, and the switch module 30 is turned off.

[0063] See also Figure 3 In some embodiments, the circuit structure 100 also includes an overcurrent detection circuit 50 for detecting the load current flowing from the energy storage group to the output port; when the current value of the load current is greater than a preset current value, the control switch unit 20 is used to control the switch module 30 to turn off, so that the energy storage group is disconnected from the output port.

[0064] Specifically, the overcurrent detection circuit 50 may include: Figure 4 The sampling resistor CN1, comparator U3A and comparator U3B, the sampling resistor CN1 is connected between the negative electrode BAT- of the energy storage group and the negative electrode CAR- of the output port, and is used to detect the load current flowing from the energy storage group to the output port, and generate the corresponding load detection voltage. The generated voltage difference is amplified by the output value of the comparator U3A and the negative input terminal of the comparator U3B. The resistor R13 and the resistor R24 ​​form a voltage divider circuit. The positive input terminal of the comparator U3B is connected to the voltage of the resistor R24. When the comparator U3B outputs a low level, that is, the voltage connected to the positive input terminal of the comparator U3B is less than the voltage connected to the negative input terminal, the current flowing through the sampling resistor CN1 is as high as 1000A. At this time, the low level output by the comparator U3B outputs a low level through the diode D9, and the output low level is connected to Figure 2 The positive input terminal of the comparator U1A in the circuit is connected to the positive input terminal of the comparator U1A, thereby causing the comparator U1A to output a low level, the transistor Q1 and the transistor Q2 are turned off, and the switch module 30 is disconnected.

[0065] In this way, when the overcurrent detection circuit 50 detects that the load current is greater than the preset current value, the switch module 30 is controlled to be disconnected, thereby achieving overcurrent protection for the circuit structure 100.

[0066] See also Figure 3 In some embodiments, the circuit structure 100 also includes an anti-reverse connection circuit 60, which is used to detect the voltage of the target power supply system to detect the connection status between the output port and the target power supply system; when the connection status between the output port and the target power supply system is reverse connection or short circuit, the control switch unit 20 is used to control the switch module 30 to turn off, so that the energy storage group is disconnected from the output port.

[0067] Specifically, the reverse connection prevention circuit 60 may include: Figure 5 In the comparator U1B, when the connection state between the output port and the target power supply system is reversed or short-circuited, the energy storage group supplies power to the output port, which may cause damage to the target power supply system and easily cause safety accidents. At this time, the voltage connected to the positive input terminal of the comparator U1B will be higher than the reference voltage connected to the negative input terminal. The comparator U1B outputs a high level to turn on the transistor Q4, and the diode D10 is equivalent to the on-state of a switch. Figure 2 The level of the positive input terminal of the comparator U1A is pulled low. The comparator U1A outputs a low level, so that the transistor Q2 and the transistor Q1 are both in the cut-off state, so that the switch module 30 is turned off. When the connection relationship between the output port and the target power supply system is normal, for example, when the output port is forwardly connected to a voltage source greater than or equal to 0.4V, the comparator U1B outputs a low level to turn off the transistor Q4 and the diode D10, which does not affect the working condition of the comparator U1A.

[0068] In this way, the output end can correctly output a level voltage according to the connection state between the output port and the target power supply system, thereby achieving control over the switch module 30 .

[0069] See also Figure 3 In some embodiments, the circuit structure further includes a voltage stabilizing circuit, which is used to access the voltage of the energy storage group and output a stable voltage.

[0070] Specifically, the voltage stabilizing circuit may include Figure 2 The voltage regulator chip U2 is connected to the energy storage group BAT+ and outputs a +5V DC voltage source.

[0071] In this way, the energy storage group can output a stable voltage through the voltage stabilizing circuit.

[0072] See also Figure 3 In some embodiments, the circuit structure 100 further includes a power-on switch, which can be used to control the connection and disconnection between the energy storage group and the output port.

[0073] Specifically, the power-on switch can be Figure 5 The switch S2 in the output port can be used to control the on / off of the energy storage group and the output port when a passive device is connected to the output port. When a passive device is connected to the output port, that is, the target power supply system has no power supply to connect, the voltage connected to the positive input of the comparator U1B is greater than the voltage connected to the negative input, and the comparator U1B will output a high level to turn on the transistor Q4, and the diode D10 is equivalent to the on state of a switch. This makes Figure 1 The positive input of comparator U1A is connected to a low level, comparator U1A outputs a low level, transistors Q1 and Q2 are turned off, and relay S1 is in a disconnected state. At this time, the connection between the energy storage group and the output port can be controlled by powering on switch S2, and switch S2 can be closed by pressing switch S2, and +5V passes through resistor R19, and switch S2 charges capacitor C10. At this time, transistor Q3 is turned on, so that the +5V voltage source continues to turn on transistor Q5 through R18 and R27, and then the +5V voltage passes through resistor R12, and diode D7 is added to the positive electrode CAR+ of the output port, pulling up the voltage connected to the negative input of comparator U1B, so that comparator U1B outputs a low level, and diode D10 is turned off, which does not affect the comparator. Figure 1The working condition of the comparator U1A in the circuit is shown in FIG. 1 . After the power-on time of the energy storage group reaches the preset time, the positive input terminal of the comparator U1A is connected to a high level, so that the comparator U1A outputs a high level, so that the transistor Q1 is turned on and the relay S1 is closed, thus realizing the connection between the energy storage group and the output port. Within a period of time after the power-on switch S2 is released, the capacitor C10 is discharged through the resistor R17, the resistor R18, and the pin 1 of the transistor Q5. During the discharge process of the capacitor C10, the transistor Q5 remains turned on, so that the transistor Q3 remains turned on, and the diode D7 is added to the positive electrode CAR+ of the output port, realizing the connection between the energy storage group and the output port. For a period of time after the power switch S2 is released, the voltage of capacitor C10 is relatively large and is still in the process of discharging. If the power switch S2 is closed again at this time, capacitor C10 is connected to pin 1 of transistor Q3 and pin 3 of transistor Q5 and discharged, so that the voltage connected to pin 1 of transistor Q3 and pin 3 of transistor Q5 is pulled up, thereby cutting off transistor Q3 and transistor Q5, and the +5V voltage cannot pass through resistor R12. Diode D7 is added to the positive electrode CAR+ of the output port. Since the CAR+ end is connected to a passive device, the voltage connected to the positive input of comparator U1B is greater than the voltage connected to the negative input. Comparator U1B will output a high level to turn on transistor Q4, and diode D10 is equivalent to the on state of a switch. This makes Figure 1 The positive input terminal of the comparator U1A is connected to a low level, the comparator U1A outputs a low level, the transistors Q1 and Q2 are cut off, and the relay S1 is in the disconnected state, thus realizing the disconnection between the energy storage group and the output port.

[0074] In this way, the power-on switch can be used to control the on and off of the energy storage group and the output port.

[0075] See also Figure 6 An embodiment of the present invention provides a power supply device 1000 , which includes a housing 400 and a circuit structure 100 according to any one of the above embodiments, and the circuit structure 100 is disposed in the housing 400 .

[0076] Specifically, the power supply device 1000 includes a car starting power supply. Thus, the power supply device 1000 can be used to provide electric energy for ignition starting of the car.

[0077] The power supply device 1000 of the present invention may further include an energy storage group, that is, the energy storage group and the circuit structure 100 are integrated to form the power supply device 1000. The output port in the power supply device 1000 may include a first clamp and a second clamp, and the first clamp and the second clamp are used to connect to the target power supply system.

[0078] An embodiment of the present invention provides a cable, which includes a shell 400 and a circuit structure 100 of any one of the above-mentioned embodiments, wherein the circuit structure 100 is arranged in the shell 400, and the output port includes a first clamp and a second clamp, and the first clamp and the second clamp are used to connect to the target power supply system; the cable also includes a pluggable interface, and the pluggable interface is used to pluggably connect to the energy storage group.

[0079] Specifically, when the car is started, electrical energy is transmitted from the energy storage group to the target power supply system through cables.

[0080] In this way, the car can be started by using a cable, and the cable can control the time when the energy storage group and the output port are connected by using the circuit structure 100 of any of the above embodiments, thereby avoiding the possibility of the car battery charging the starting power supply reversely.

[0081] The embodiment of the present invention provides a circuit structure 100, a power supply device 1000 and a cable. The circuit structure 100 is used to control the connection and disconnection of the energy storage group and the output port, and the output port is used to connect the target power supply system, and the target power supply system includes at least one of a starter and a car battery. The circuit structure 100 includes a switch module 30, a first charging capacitor 10 and a control switch unit 20. Among them, the switch module 30 is used to control the energy storage group to be connected or disconnected with the output port. The first charging capacitor 10 is used to generate a first detection voltage according to the duration of the target driving voltage, and the target driving voltage is used to drive the switch module 30 to connect. When the duration of the target driving voltage is greater than the preset duration, the control switch unit 20 controls the switch module 30 to turn off based on the first detection voltage. The first detection voltage can reflect the duration of the target driving voltage, and the duration of the target driving voltage can reflect the connection time of the switch module 30. When the duration of the target driving voltage is greater than the preset duration, the control switch unit 20 controls the switch module 30 to disconnect based on the first detection voltage. In this way, the connection time between the energy storage group and the output port can be controlled by the hardware circuit, which can avoid the energy storage group and the output port being connected for too long. Compared with the operation speed of software control, it is faster and reduces the possibility of the car battery reverse charging the starting power supply.

[0082] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0083] In addition, the term "connection" should be understood in a broad sense, for example, it can include fixed connection, detachable connection, or integral connection; it can include direct connection, indirect connection through an intermediate medium, and internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0084] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0085] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0086] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A circuit structure, characterized in that: The circuit structure is used to control the on / off of the energy storage group and the output port, the output port is used to connect to a target power supply system, the target power supply system includes at least one of a starter and a car battery, and the circuit structure includes: A switch module, used to control the energy storage group to be connected or disconnected with the output port; a first charging capacitor, wherein the first charging capacitor is used to generate a first detection voltage according to a duration of a target driving voltage, and the target driving voltage is used to drive the switch module to be connected; A control switch unit is provided, wherein when the duration of the target driving voltage is greater than a preset duration, the control switch unit controls the switch module to be turned off based on the first detection voltage.

2. The circuit structure according to claim 1, characterized in that: The first charging capacitor is used to charge after the target driving voltage is used to drive the switch module to be connected, so as to generate the first detection voltage.

3. The circuit structure according to claim 1, characterized in that: In a case where the duration of the target driving voltage is greater than a preset duration, the first detection voltage is greater than a first preset voltage, so that the control switch unit controls the switch module to be turned off.

4. The circuit structure according to claim 1, characterized in that: The control switch unit comprises a switch tube, the emitter of the switch tube is used to connect to the target driving voltage, the base of the switch tube is used to connect to the first detection voltage, and the collector of the switch tube is connected to the switch module; When the duration of the target driving voltage is greater than the preset duration, the first detection voltage disconnects the switch tube, and the base and collector of the switch tube are disconnected, so that the switch module stops receiving the target driving voltage and disconnects.

5. The circuit structure according to claim 1, characterized in that: The circuit structure further includes: A power-on delay circuit is used to detect the power-on time of the energy storage group and output the target driving voltage after the power-on time of the energy storage group reaches a preset time.

6. The circuit structure according to claim 5, characterized in that: The power-on delay circuit includes a detection circuit, which is used to detect the power-on time of the energy storage group to generate a second detection voltage. The power-on delay circuit is specifically used to output the target drive voltage to charge the first charging capacitor when the second detection voltage is greater than a second preset voltage.

7. The circuit structure according to claim 6, characterized in that: The power-on delay circuit also includes a comparator, a first input end of the comparator is used to access the second preset voltage, a second input end of the comparator is used to access the second detection voltage, and the comparator is used to output the target drive voltage when the second detection voltage is greater than the second preset voltage to charge the first charging capacitor.

8. The circuit structure according to claim 6, characterized in that: The detection circuit also includes a second charging capacitor, and the second charging capacitor is used to charge after the energy storage group is powered on to generate the second detection voltage.

9. The circuit structure according to claim 6, characterized in that: After the power-on time of the energy storage group reaches a preset time, the second detection voltage is greater than the second preset voltage.

10. The circuit structure according to claim 1, characterized in that: The circuit structure further includes: A driving circuit is connected to the switch module. When the control switch unit controls the switch module to turn off, the driving circuit is disconnected so that the switch module is disconnected; when the control switch unit controls the switch module to close, the driving circuit can drive the switch module to close.

11. The circuit structure according to claim 1, characterized in that: The circuit structure also includes an overcurrent detection circuit for detecting a load current flowing from the energy storage group to the output port; When the current value of the load current is greater than a preset current value, the control switch unit controls the switch module to be turned off, so as to control the switch module to be turned off, so that the energy storage group is disconnected from the output port.

12. The circuit structure according to claim 1, characterized in that: The circuit structure further includes an anti-reverse connection circuit, which is used to detect the voltage of the target power supply system to detect the connection state between the output port and the target power supply system; When the connection state between the output port and the target power supply system is reverse connection or short circuit, the control switch unit controls the switch module to turn off, so as to control the switch module to turn off, so that the energy storage group is disconnected from the output port.

13. The circuit structure according to claim 1, characterized in that: The circuit structure further includes a power-on switch, and the power-on switch can be used to control the on and off of the switch module.

14. A power supply device, characterized in that: The power supply device comprises a housing and a circuit structure according to any one of claims 1 to 13, wherein the circuit structure is arranged in the housing.

15. A cable, characterized in that: The cable comprises a housing and a circuit structure according to any one of claims 1 to 13, wherein the circuit structure is arranged in the housing, and the output port comprises a first clamp and a second clamp, wherein the first clamp and the second clamp are used to connect to the target power supply system; The cable also includes a pluggable interface, and the pluggable interface is used for pluggable connection to the energy storage group.

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