Device for adjusting positive and negative polarities of automobile charging clamp and starting system

Abstract

The utility model relates to a new energy automobile technology, and discloses a device for adjusting positive and negative polarities of an automobile charging clamp and a starting system. The device comprises a polarity judgment module, a polarity conversion module, a first connection clamp and a second connection clamp, the polarity judgment module is used for judging the connected positive and negative electrodes when the first connecting clamp and the second connecting clamp are respectively connected with the automobile storage battery; and the polarity conversion module is used for controlling positive and negative polarity adjustment according to the judgment result of the polarity judgment module, so that the first connecting clamp and the second connecting clamp are respectively conducted with the positive electrode and the negative electrode of an external power supply or the first connecting clamp and the second connecting clamp are respectively conducted with the negative electrode and the positive electrode of the external power supply. Through the polarity judgment module and the polarity conversion module, the positive and negative polarities of the automobile storage battery connected with the charging connection clamp can be automatically identified when the automobile emergency power supply is charged, and the polarity corresponding to the charging connection clamp can be automatically switched, so that the charging efficiency and the safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, in particular to a device for adjusting the positive and negative polarities of a vehicle charging clamp and a starting system. Background Art

[0002] With the widespread popularity of new energy vehicles, car emergency power supplies (also known as car emergency starting power supplies) are also becoming more and more widely used. Specifically, car emergency power supplies are mainly used to provide the required starting power for the car. When the car emergency power supply is out of power, the car emergency power supply can be charged by connecting the battery charging clamp. However, since the power supply has positive and negative poles, users need to carefully check and ensure that the positive and negative poles are correctly connected, otherwise a short circuit will occur, the circuit lamp will burn out, and charging will be impossible.

[0003] In the prior art, polarity marking is performed by labeling, etc., which is inefficient and unsafe, and cannot avoid problems such as short circuits and circuit burnout caused by wrong connection. Utility Model Content

[0004] The purpose of the utility model is to provide a device and a starting system for adjusting the positive and negative polarity of a car charging clamp, which can automatically identify the positive and negative polarity of a car battery connected to the charging connection clamp when charging with a car emergency power supply and automatically switch the positive and negative polarity corresponding to the charging connection clamp, thereby improving charging efficiency and safety.

[0005] In order to solve the above technical problems, the embodiment of the utility model provides a device for adjusting the positive and negative polarity of a car charging clip, comprising: a polarity judgment module, a polarity conversion module, a first connecting clip and a second connecting clip;

[0006] The polarity judgment module includes an eighth resistor, a ninth resistor, a sixteenth resistor, a seventeenth resistor and a single-chip computer, wherein the eighth pin of the single-chip computer is respectively connected to one end of the ninth resistor and the seventeenth resistor, the other end of the seventeenth group of resistors is used to be connected to the negative electrode of the external power supply, the other end of the ninth resistor is connected to the first input end of the polarity conversion module, the other end of the ninth resistor is also used to be connected to the positive electrode of the external power supply, the eleventh pin of the single-chip computer is respectively connected to one end of the eighth resistor and the sixteenth resistor, the other end of the sixteenth resistor is used to be connected to the negative electrode of the external power supply, and the other end of the eighth resistor is connected to the second connecting clip;

[0007] The polarity determination module is used to determine the positive and negative poles to which the first connection clip and the second connection clip are connected when they are respectively connected to the car battery;

[0008] The second input terminal, the third input terminal, and the fourth input terminal of the polarity conversion module are respectively connected to different pins of the single-chip microcomputer, and the two output terminals of the polarity conversion module are both connected to the first connecting clip and the second connecting clip;

[0009] The polarity conversion module is used to control the positive and negative polarity adjustment according to the judgment result of the polarity judgment module, so that the first connection clip and the second connection clip are respectively connected to the positive pole and the negative pole of the external power supply, or the first connection clip and the second connection clip are respectively connected to the negative pole and the positive pole of the external power supply;

[0010] The first connecting clip and the second connecting clip are used to connect two poles of a car battery respectively.

[0011] The embodiment of the utility model further provides a starting system, comprising an external power supply and the above-mentioned device for adjusting the positive and negative polarity of the automobile charging clamp.

[0012] Compared with the prior art, the implementation mode of the utility model can automatically identify the positive and negative polarities of the car battery connected to the charging connection clip when the car emergency power supply is charging, and automatically switch the positive and negative polarities corresponding to the charging connection clip. There is no need to mark the positive and negative poles of the car emergency power supply in advance, nor is there any need to manually adjust the connection of the clip when the connection clip is connected to the car emergency power supply in reverse, thereby improving charging efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0014] Figure 1 It is a schematic diagram of a module of a device for adjusting the positive and negative polarity of a car charging clamp according to the first embodiment of the utility model;

[0015] Figure 2 It is a schematic diagram of a module of a device for adjusting the positive and negative polarity of a vehicle charging clamp according to a second embodiment of the utility model;

[0016] Figure 3 It is a detailed circuit diagram of a device for adjusting the positive and negative polarity of a car charging clamp in the utility model;

[0017] Figure 4 It is a schematic diagram of a module of a device for adjusting the positive and negative polarities of a vehicle charging clamp according to a third embodiment of the utility model.

[0018] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the utility model clearer, the various embodiments of the utility model will be described in detail below with reference to the accompanying drawings. However, different technicians in the field can understand that in the various embodiments of the utility model, many technical details are proposed in order to make the reader better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical schemes claimed for protection in the claims can also be achieved.

[0020] The first embodiment of the utility model relates to a device for adjusting the positive and negative polarity of a car charging clamp. The specific structure of the device for adjusting the positive and negative polarity of a car charging clamp is as follows: Figure 1 As shown, it includes a polarity judgment module 11, a polarity conversion module 12, a first connecting clamp 13 and a second connecting clamp 14.

[0021] Specifically, the polarity judgment module 11 includes an eighth resistor a, a ninth resistor b, a sixteenth resistor c, a seventeenth resistor d and a single chip computer 1, wherein the eighth pin of the single chip computer 1 is connected to one end of the ninth resistor b and the seventeenth resistor d respectively, and the other end of the seventeenth resistor d is used to be connected to the negative electrode of the external power supply ( Figure 1 , which is a schematic diagram of connection with an external power supply); the other end of the ninth resistor b is connected to the first input end of the polarity conversion module 12, and the other end of the ninth resistor b is also used to be connected to the positive electrode of the external power supply 10, the eleventh pin of the single-chip computer 1 is respectively connected to one end of the eighth resistor a and the sixteenth resistor c, the other end of the sixteenth resistor c is used to be connected to the negative electrode of the external power supply 10, and the other end of the eighth resistor a is connected to the second connecting clip 14.

[0022] The polarity determination module 11 is used to determine the positive and negative poles to which the first connection clip 13 and the second connection clip 14 are connected when they are respectively connected to the vehicle battery.

[0023] Specifically, the polarity judgment module 11 is used to calculate the resistance R between the first connection clip 13 and the second connection clip 14 according to the voltage values ​​measured by the eighth resistor a, the ninth resistor b, the sixteenth resistor c, the seventeenth resistor d, the eighth pin and the eleventh pin after the first connection clip 13 and the second connection clip 14 are connected to the two poles of the car battery, when the polarity conversion module 12 (specifically, a switch device in the polarity conversion module 12 is connected to the first connection clip, connected to the external power supply, and connected to the ninth resistor) is connected to the positive pole of the external power supply and the first connection clip 13 is turned on. x , according to the resistor R xThe size of determines whether the first connecting clip 13 and the second connecting clip 14 are connected to the positive electrode or the negative electrode.

[0024] The second input terminal, the third input terminal, and the fourth input terminal of the polarity conversion module 12 are respectively connected to different pins of the single-chip computer 1 (for example, the second input terminal of the polarity conversion module 12 is connected to the third pin of the single-chip computer 1, the third input terminal of the polarity conversion module 12 is connected to the sixth pin of the single-chip computer, and the fourth input terminal of the polarity conversion module 12 is connected to the ninth pin of the single-chip computer), and the two output terminals of the polarity conversion module 12 are both connected to the first connecting clip 13 and the second connecting clip 14;

[0025] The polarity conversion module 12 is used to control the positive and negative polarity adjustment according to the judgment result of the polarity judgment module 11, so that the first connection clip 13 and the second connection clip 14 are respectively connected to the positive and negative poles of the external power supply, or the first connection clip 13 and the second connection clip 14 are respectively connected to the negative and positive poles of the external power supply. In other words, the polarity conversion module 12 can adjust the polarity of the first connection clip 13 and the second connection clip 14 according to the judgment result of the polarity judgment module 11, so that the first connection clip 13 and the second connection clip 14 can be connected to the polarity corresponding to the external power supply according to the polarity of the battery connected to the two connection clips, without marking the positive and negative poles of the automobile emergency power supply in advance, and without determining the positive and negative poles of the two clips or the positive and negative poles of the automobile battery in advance. The two connection clips can be randomly connected to the two poles of the battery, and the external power supply can be connected to the positive and negative poles of the automobile battery through the two connection clips, and there is no need to manually adjust the connection between the clip and the battery when the connection clip is connected to the automobile emergency power supply in reverse.

[0026] The first connecting clamp 13 and the second connecting clamp 14 are used to connect two poles of a car battery respectively.

[0027] In this embodiment, the single chip microcomputer is MCU (Microcontroller Unit), and specifically, the single chip microcomputer may be a SQ2711 chip, which has 16 pins. The first connecting clip and the second connecting clip are two clips for connecting the two poles of the car battery when charging the car, and are also called car charging clips.

[0028] In a specific implementation, the eighth resistor a may be a resistor or include at least two resistors connected in series (for example, including a high-precision resistor and a low-precision resistor connected in series, such as Figure 3 R8 and R 12 ). Similarly, the ninth resistor b (such as Figure 3 R9 and R 14 ), the sixteenth resistor c and the seventeenth resistor d can both be one resistor or include at least two resistors connected in series.

[0029] In a specific implementation, the first connecting clip 13 can be connected to the positive electrode of the car battery, and can also be connected to the negative electrode of the car battery; similarly, the second connecting clip 14 can be connected to the positive electrode of the car battery, and can also be connected to the negative electrode of the car battery.

[0030] Specifically, when the first connecting clip 13 and the second connecting clip 14 are respectively connected to the two poles of the car battery (at this time, the user can connect the two connecting clips to the two poles of the car battery at will), and the device for adjusting the positive and negative polarity of the car charging clip described in this embodiment is connected to the external power supply, and after power-on, first, the single-chip microcomputer 1 initially defaults to the first connecting clip 13 being connected to the positive pole of the car battery and the second connecting clip 14 being connected to the negative pole of the car battery, and performs polarity judgment, and does not charge the car battery (that is, the single-chip microcomputer 1 sends a signal to the polarity conversion module 12 at a certain frequency to adjust the conduction of each sub-module in the polarity conversion module, so that the first connecting clip 13 is instantaneously connected to the positive pole of the external power supply, and the polarity is judged by the resistance value and voltage value obtained at the moment of conduction).

[0031] Furthermore, other pins of the single-chip computer 1 can also be connected to the positive and negative poles of the external power supply, respectively, so that the voltage of the external power supply can be obtained through the pins of the single-chip computer 1. For example, the first pin of the single-chip computer 1 is connected to the positive pole of the external power supply, and the fourteenth pin of the single-chip computer 1 is connected to the negative pole of the external power supply. If the single-chip computer 1 determines that the voltage of the external power supply is a safe voltage, the polarity judgment module 11 judges the positive and negative poles connected to the first connecting clip and the second connecting clip.

[0032] Alternatively, the voltage of the external power supply may not be obtained, and the positive and negative poles of the car battery connected to the first connecting clip 13 and the second connecting clip 14 may be directly determined by the polarity determination module 11. Specifically, based on the connection circuit of the polarity determination module 11, the voltage difference between the eighth pin and the eleventh pin of the single-chip computer 1 is obtained, and the resistance value R to be calculated between the first connecting clip 13 and the second connecting clip 14 after the car battery is clamped is calculated according to the voltage difference. x, according to the resistance value to be calculated, determine whether the positive and negative poles of the car battery clamped by the first connection clip 13 and the second connection clip 14 are consistent with the initial default polarity. If they are consistent, control charging. If they are inconsistent (that is, the user actually connects the first connection clip 13 to the negative pole of the car battery, and the second connection clip 14 to the positive pole of the car battery), the single-chip computer 1 sends a signal to the polarity conversion module 12 to adjust the conduction of each submodule in the polarity conversion module, so that the first connection clip 13 is connected to the negative pole of the external power supply, and the second connection clip 14 is connected to the positive pole of the external power supply, so that the car battery can be charged through the external power supply 10, the first connection clip 13, and the second connection clip 14. Based on this, it is only necessary to rely on the resistance value in the circuit to automatically analyze the positive and negative connections when the two connection clips are clamped on the battery. The overall circuit structure is simple, and the use of resistors as the main components can also greatly reduce the volume after the circuit board is made, and the application is universal.

[0033] Specifically, the resistance value R to be calculated x The resistance value can be obtained through experiments based on the circuit resistance value, and can be a preset threshold. If the resistance value to be calculated is greater than the preset threshold and does not tend to infinity, it is determined that the positive and negative poles of the car battery clamped by the first connecting clip 13 and the second connecting clip 14 are consistent with the initial default polarity; if the resistance value to be calculated is less than the preset threshold, it is determined that the positive and negative poles of the car battery clamped by the first connecting clip 13 and the second connecting clip 14 are inconsistent with the initial default polarity.

[0034] For example, if the resistance value to be calculated is greater than 10Ω and does not tend to infinity, it is determined that the positive and negative poles of the car battery clamped by the first connecting clip 13 and the second connecting clip 14 are consistent with the initial default polarity; if the resistance value to be calculated is less than 10Ω, it is determined that the positive and negative poles of the car battery clamped by the first connecting clip 13 and the second connecting clip 14 are inconsistent with the initial default polarity.

[0035] Specifically, the principle of calculation based on the circuit of the polarity judgment module is as follows:

[0036] Definition: V8 is the voltage generated by the external power supply shown in the figure and measured at the eighth pin of the single-chip computer 1;

[0037] V 11 The voltage generated by the external power supply shown in the figure is measured at the eleventh pin of the single-chip computer 1;

[0038] V x =V8—V 11

[0039] R x is the resistance value to be calculated between the two connection clips;

[0040] R xa It is the equivalent resistance of on-board electrical appliances such as car dashboards;

[0041] R xb :Equivalent resistance of automobile battery;

[0042] (1) When there is no battery in the car (or the battery is broken or has no power), the resistance value to be calculated between the two clamps is equal to the equivalent resistance R of the car dashboard and other on-board electrical appliances xa , so that R X The eighth resistor (ie, R8), the ninth resistor (ie, R9), and the seventeenth resistor (ie, R 17 ) and the sixteenth resistor (i.e. R 16 ) form a bridge circuit, then:

[0043] Assume: R8 = 9.0KΩ, R 16 =R 17 =1KΩ, R9 = 10KΩ, external power supply voltage V = 15v

[0044] According to the bridge principle, when V8 = V 11 , that is, when Vx=0, the product of the opposite resistances is equal,

[0045] That is (R x +R8)*R17=R9*R 16 ,

[0046] R x =(R9*R 16 / R 17 )—(R8)=1.0KΩ

[0047] At this time, V8 = V 11 =(1 / 11)*15=1.363V, that is, V x =0

[0048] Assume Rx = ∞, that is, the clamp is in an open circuit state,

[0049] At this time V 11 →0V,V8=(1 / 11)*15=1.363V,

[0050] Vx=V8-V 11 =1.363V, that is, Vx = the maximum value of Vx

[0051] Assume R x =10KΩ, at this time V 11 =1 / (10+9)*15=0.789V, V8=(1 / 11)*15=1.363V,

[0052] V x =V8—V 11 =0.574V, that is, V x>0

[0053] Let R x =0KΩ, at this time V 11 =(1 / 10)*15=1.500V, V8=(1 / 11)*15=1.363V,

[0054] V x =V8—V 11 = -0.137V, that is, V x <0

[0055] This proves that: R x =∞, V x Maximum (i.e. V8 and V 11 The difference between the two is the largest), R x =0, V x Minimum (i.e. V8 and V 11 The difference between them is the smallest). That is: R x ∝V x ,

[0056] According to the above principle, by measuring the voltage of the eighth and eleventh pins of the microcontroller, V x The value (according to V x =V8—V 11 ), we can deduce and calculate R x The value of .

[0057] (2) When connected to a car battery, there are two situations:

[0058] ①Car battery voltage>external battery voltage

[0059] When the connecting clip is clamped on the car, the power of the car battery charges the external battery through the ninth resistor R9. At this time, the charging current offsets the current output by the external battery, so that: V 11 →0, Vx→Vx maximum value;

[0060] Because: R x ∝V x

[0061] So: At this time R x →∞, which is equivalent to the connection clip being left hanging, and the program will not proceed to the next step (i.e., charging will not occur).

[0062] ②Car battery voltage ≦ external battery voltage

[0063] When the connection clamp is attached to the car, the car battery will not have any effect on the external battery voltage, nor on the circuit. x Still based on the equivalent resistance R of electrical equipment such as automobile dashboards xaCalculations are performed (i.e., calculations are performed when there is no battery in the car).

[0064] When a car battery is connected and the positive and negative poles of the connection clips are not in the default direction:

[0065] At this time, the reverse resistance R of the reverse-connected electrical equipment such as the car dashboard xa →0, and the reverse-connected car battery will absorb the current of the external battery, which is equivalent to an effective load, resistance = R xb ,

[0066] Because R x =R xa R xb / (R xa +R xb )

[0067] So R x →0, therefore, in a specific implementation, if the resistance value to be calculated is less than a resistance threshold value (such as 10Ω, depending on the different products connected, such as different brands and models, the specific resistance threshold value may be different), it is determined that the positive and negative poles of the car battery clamped by the first connecting clip 13 and the second connecting clip 14 are inconsistent with the initial default polarity; if the resistance value to be calculated is greater than the resistance threshold value (such as 10Ω) and does not tend to infinity, it is determined that the positive and negative poles of the car battery clamped by the first connecting clip 13 and the second connecting clip 14 are consistent with the initial default polarity.

[0068] Based on the above description, the circuit of the polarity determination module 11 can determine the positive and negative polarity of the connection clip.

[0069] Furthermore, the second embodiment of the present utility model relates to a device for adjusting the positive and negative polarity of a vehicle charging clamp, see Figure 2 , Figure 2 Schematic diagram of a module of a device for adjusting the positive and negative polarities of a vehicle charging clamp according to a second embodiment of the present utility model, wherein the polarity conversion module includes a boost submodule 15 , a drive submodule 16 , a positive submodule 17 and a negative submodule 18 .

[0070] The polarity conversion module is used to control the switch unit 1 and the switch unit 3 to be turned on, and control the switch unit 2 and the switch unit 4 to be turned off according to the judgment result of the polarity judgment module; or control the switch unit 2 and the switch unit 4 to be turned on, and control the switch unit 1 and the switch unit to be turned off.

[0071] The driving submodule 16 includes a first driving unit 19 , a second driving unit 20 and a third driving unit 21 , the positive submodule 17 includes a switch unit 111 and a switch unit 2 112 , and the negative submodule 18 includes a switch unit 3 113 and a switch unit 4 114 .

[0072] The input end of the first driving unit 19 is connected to the third pin of the single chip computer 1 , and the output end of the first driving unit 19 is connected to the first port of the switch unit 111 and the first port of the switch unit 3 113 respectively.

[0073] The input end of the second driving unit 20 is connected to the sixth pin of the single chip computer 1, and the output end of the second driving unit 20 is connected to the first port end of the second switch unit 112;

[0074] The input end of the third driving unit 21 is connected to the ninth pin of the single chip computer 1, and the output end of the third driving unit 21 is connected to the first port of the fourth switch unit 114;

[0075] The second ports of the switch unit 111 and the switch unit 2 112 are both connected to the positive electrode of the external power supply 10, the third ports of the switch unit 111 and the switch unit 2 112 are both connected to the ninth resistor, the fourth ports of the switch unit 111 and the switch unit 2 112 are both connected to one end of the boost submodule 15, the second ports of the switch unit 3 113 and the switch unit 4 114 are both connected to the negative electrode of the external power supply 10, the fifth port of the switch unit 113 and the third port of the switch unit 4 114 are both connected to the second connection clamp 14, and the fifth port of the switch unit 2 112 and the third port of the switch unit 3 113 are both connected to the first connection clamp 13;

[0076] The other end of the boost submodule 15 is also connected to the positive electrode of the external power source 10;

[0077] The boost submodule 15 is used for boosting the circuits of the switch unit 1 and the switch unit 2.

[0078] In this embodiment, the positive submodule 17 includes a switch unit 111 and a switch unit 2 112, and they are connected to the second connection clip 14 and the first connection clip 13 respectively, and the negative submodule 18 includes a switch unit 3 113 and a switch unit 4 114, and they are connected to the first connection clip 13 and the second connection clip 14 respectively. This is equivalent to having two groups of switch units (wherein the switch unit 1 and the switch unit 3 are a group of switch units, and the switch unit 2 and the switch unit 4 are a group of switch units). When one group of switch units is turned on (such as the switch unit 2 and the switch unit 4 are turned on, and the switch unit 1 and the switch unit 3 are turned off), the corresponding first connection clip 13 is connected to the positive electrode of the battery, and the second connection clip 14 is connected to the negative electrode of the battery. When the other group of switch units is turned on (such as the switch unit 1 and the switch unit 3 are turned on, and the switch unit 2 and the switch unit 4 are turned off), the corresponding first connection clip 13 is connected to the negative electrode of the battery, and the second connection clip 14 is connected to the positive electrode of the battery. There is no need for the user to manually adjust the first connection clip or the second connection clip, and the polarity on the two connection clips can be directly converted.

[0079] Specifically, when the single-chip computer 1 judges based on the circuit of the polarity judgment module 11 (in the initial judgment, the third pin of the single-chip computer can send a low level, the sixth pin can send a high level, and the ninth pin can send a high level, and the switch unit 111, the switch unit 3 113, and the switch unit 4 114 are all turned off, and the switch unit 2 112 is turned on. According to the adjustment of the sending frequency, the conduction can be controlled to be instantaneous conduction, then the first connecting clip 13 is connected to the ninth resistor b and the positive electrode of the external power supply, R8—>R X —> Second switch unit —> R9 forms a loop, and then calculates the resistance R between the first connecting clip 13 and the second connecting clip x , according to the resistor R x The size of the first connecting clip 13 determines whether the first connecting clip and the second connecting clip are connected to the positive or negative electrode respectively) When the first connecting clip 13 is connected to the negative electrode of the battery and the second connecting clip 14 is connected to the positive electrode of the battery, a signal is sent to the first driving unit 19, the second driving unit 20 and the third driving unit 21 to drive the switch unit 111 and the switch unit 3 113 to be turned on, and drive the switch unit 2 112 and the switch unit 4 114 to be turned off, so that the first connecting clip 13 is connected to the negative electrode of the external power supply 10, and the second connecting clip 14 is connected to the positive electrode of the external power supply 10.

[0080] Similarly, when the single chip microcomputer 1 determines that the first connecting clip 13 is connected to the positive pole and the second connecting clip 14 is connected to the negative pole based on the circuit of the polarity judgment module 11, a signal is sent to the first driving unit 19, the second driving unit 20 and the third driving unit 21 to drive the switch unit 111 and the switch unit 3 113 to be turned off, and drive the switch unit 2 112 and the switch unit 4 114 to be turned on, so that the first connecting clip 13 is connected to the positive pole of the external power supply 10, and the second connecting clip 14 is connected to the negative pole of the external power supply 10.

[0081] Specifically, the boost submodule may include a small MCU, capacitors, inductors, MOS tubes, and resistors, and their connection relationship may be similar to the boost module configuration in the prior art. For details, see Figure 3 The medium boost submodule 15 will not be described in detail here.

[0082] For further information, see Figure 3 , Figure 3 The second switch unit 112 includes: a first MOS transistor QP1, a second MOS transistor QP4, a first switch resistor RP2 and a second switch resistor RP5; one end of the first MOS transistor QP1 and the second MOS transistor QP4 are both connected to the first connection clip 13 (such as Figure 3 As shown, the drains of the first MOS transistor QP1 and the second MOS transistor QP4 are both connected to the first connecting clip 13, and the other ends of the first MOS transistor QP1 and the second MOS transistor QP4 (as shown in FIG. Figure 3 The source electrode is shown in FIG. 1 ) is connected to the positive electrode of the external power source 10. Another end of the first MOS transistor QP1 (shown as the source electrode) is connected to the positive electrode of the external power source 10. Figure 3 The gate is shown as a gate) is connected to one end of the first switch resistor RP2, and the other end of the second MOS transistor QP4 (as shown as a gate) is connected to one end of the first switch resistor RP2. Figure 3 The gate is shown as a gate) is connected to one end of the second switch resistor RP5, and the other ends of the first switch resistor RP2 and the second switch resistor RP5 are both connected to the second driving unit 20.

[0083] The first switch resistor RP2 and the second switch resistor RP5 are both gate resistors.

[0084] Furthermore, the ports of the first MOS transistor QP1 and the second MOS transistor QP4 in the switch unit 2 connected to the first connecting clip 13 may be further connected to a current limiting resistor (eg Figure 3 In the preferred embodiment, connecting the current limiting resistor can stabilize the current and provide overvoltage protection, thereby improving the stability and safety of the circuit.

[0085] Please continue to see Figure 3 The switch unit 4 includes a third MOS tube QN3, a fourth MOS tube QN4, a third switch resistor RN1 and a fourth switch resistor RN4; one end of the third MOS tube QN3 and the fourth MOS tube QN4 (such as Figure 3 The drain electrode is shown in FIG. 1 ) is connected to the second connection clip 14. The other ends of the third MOS transistor QN3 and the fourth MOS transistor QN4 (as shown in FIG. 1 ) are connected to the second connection clip 14. Figure 3The source electrode is shown in FIG. 1 ) is connected to the negative electrode of the external power source 10, and another end of the third MOS tube QN3 (shown as the source electrode) is connected to the negative electrode of the external power source 10. Figure 3 The gate is shown as a gate) is connected to one end of the third switch resistor RN1, and the other end of the fourth MOS tube QN4 (as shown as a gate) is connected to one end of the third switch resistor RN1. Figure 3 The gate is shown as a gate) is connected to one end of the fourth switch resistor RN4, and the other ends of the third switch resistor RN1 and the fourth switch resistor RN4 are both connected to the third driving unit 21.

[0086] Specifically, the switch unit 111 and the switch unit 2 112 are mirror circuits, the switch unit 3 113 and the switch unit 4 114 are mirror circuits, the switch unit 1 22 also includes two MOS tubes QP2 and QP3, and two resistors RP3 and RP4, and the switch unit 3 113 also includes two MOS tubes QN1 and QN2, and two resistors RN2 and RN3.

[0087] Specifically, the switch unit 1 includes: a fifth MOS transistor QP2, a sixth MOS transistor QP3, a fifth switch resistor RP3 and a sixth switch resistor RP4; one end of the fifth MOS transistor QP2 and the sixth MOS transistor QP3 are both connected to the second connecting clip 14, the other ends of the fifth MOS transistor QP2 and the second MOS transistor are both connected to the positive electrode of the external power supply 10, another end of the fifth MOS transistor QP2 is connected to one end of the fifth switch resistor RP3, another end of the sixth MOS transistor QP3 is connected to one end of the sixth switch resistor RP4, and the other ends of the fifth switch resistor RP3 and the sixth switch resistor RP4 are both connected to the first driving unit 19;

[0088] The switch unit 3 includes: a seventh MOS transistor QN1, an eighth MOS transistor QN2, a seventh switch resistor RN3 and an eighth switch resistor RN2; one end of the seventh MOS transistor QN1 and the eighth MOS transistor QN2 are both connected to the first connection clip 13, the other ends of the seventh MOS transistor QN1 and the eighth MOS transistor QN2 are both connected to the negative electrode of the external power supply 10, another end of the seventh MOS transistor QN1 is connected to one end of the seventh switch resistor RN3, another end of the eighth MOS transistor QN2 is connected to one end of the eighth switch resistor RN2, and the other ends of the seventh switch resistor RN3 and the eighth switch resistor RN2 are both connected to the first driving unit 19. Similarly, one end of the MOS transistors QP2 and QP3 can be connected to the current limiting resistor R34.

[0089] For further information, please see Figure 3The first driving unit 19 includes: a first resistor R41, a second resistor R46, a first transistor Q7, a first pull-up resistor R31, a third resistor R36, a fourth resistor R38, a first driving MOS tube Q3, a second driving MOS tube Q5, an eighteenth resistor R28, a first diode ZD3, a fifth resistor R44, a sixth resistor R43, a third driving MOS tube Q11, a fourth driving MOS tube Q12, a seventh resistor R33, and a second diode D11;

[0090] One end of the first resistor R41 is connected to the third pin of the single-chip computer U2, the other end of the first resistor R41 is respectively connected to the second resistor R46 and one end of the first transistor Q7, the other end of the second resistor R46 is grounded, the other end of the first transistor Q7 is grounded, another end of the first transistor Q7 is connected to one end of the first pull-up resistor R31, and the other end of the first pull-up resistor R31 is connected to the positive electrode of the external power supply 10.

[0091] The first resistor R41 and the second resistor R46 are driving resistors of the first transistor Q7 , and the third resistor R36 and the fourth resistor R38 are gate resistors.

[0092] The other end of the first transistor Q7 is also connected to the third resistor R36 and the fourth resistor R38. The other end of the third resistor R36 is connected to one end of the first driving MOS transistor Q3 (such as Figure 3 The other end of the fourth resistor R38 is connected to one end of the second driving MOS tube Q5 (as shown in FIG. Figure 3 The first driving MOS transistor Q3 and the second driving MOS transistor Q5 are connected to each other at the other end (as shown in FIG. Figure 3 The first driving MOS tube Q3 and the second driving MOS tube Q5 are both grounded. Figure 3 The drain electrode is shown as the drain electrode) is also connected to the switch first unit 111, and the further end (as shown in FIG. Figure 3 The drain electrode is also connected to one end of the eighteenth resistor R28, and another end of the eighteenth resistor R28 is also connected to the cathode of the first diode ZD3. The first diode D8 can be a voltage-stabilizing diode D8, and its anode is also connected to the anode of the external power supply 10. Figure 3 ,exist Figure 3 In the embodiment, the boost submodule 15 transmits the boosted voltage to the gates of the MOS transistors QP2 and QP3 in the switch unit 111 through the resistor R26 and the diode D9, so that the MOS transistors QP2 and QP3 in the switch unit 111 can be turned on when the switch unit 2 112 is turned on.

[0093] The further end of the first triode Q7 is also connected to both the fifth resistor R44 and the sixth resistor R43, the other end of the fifth resistor R44 is connected to one end of the third driving MOS transistor Q11, the other end of the sixth resistor R43 is connected to one end of the fourth driving MOS transistor Q12, the other ends of the third driving MOS transistor Q11 and the fourth driving MOS transistor Q12 are both grounded, the further ends of the third driving MOS transistor Q11 and the fourth driving MOS transistor Q12 are also connected to the switch three unit 113, the further ends of the third driving MOS transistor Q11 and the fourth driving MOS transistor Q12 are also connected to one end of the seventh resistor R33, the further end of the seventh resistor R33 is also connected to the cathode of the second diode D11, and the anode of the second diode D11 is also connected to the anode of the external power supply 10.

[0094] Furthermore, the first diode ZD3, the second diode D11 and the first pull-up resistor R31 are also grounded respectively. Figure 3 The capacitors C16, C20 and C19 are shown to be grounded. In this preferred embodiment, the capacitors can play a filtering role.

[0095] Specifically, the second driving unit 20 includes: an eighth resistor R40, a ninth resistor R47, a second triode Q8, a second pull-up resistor R30, a tenth resistor R37, an eleventh resistor R39, a third driving MOS tube Q4, a fourth driving MOS tube Q6, a twelfth resistor R29, and a third diode D8;

[0096] One end of the eighth resistor R40 is connected to the third pin of the single-chip computer U2, the other end of the eighth resistor R40 is respectively connected to the ninth resistor R47 and one end of the second transistor Q8, the other end of the ninth resistor R47 is grounded, the other end of the second transistor Q8 is grounded, another end of the second transistor Q8 is connected to one end of the second pull-up resistor R30, the other end of the second pull-up resistor R30 is connected to the positive electrode of the external power supply 10, the other end of the second transistor Q8 is also connected to the tenth resistor R37 and the eleventh resistor R39, the other end of the tenth resistor R37 is connected to one end of the third driving MOS tube Q4 (such as Figure 3 The other end of the eleventh resistor R39 is connected to one end of the fourth driving MOS tube Q6 (as shown in FIG. Figure 3 The other end (shown as the gate) of the third driving MOS tube Q4 and the other end (shown as the gate) of the fourth driving MOS tube Q6 are connected. Figure 3 The source is shown as the source electrode) is grounded, and another end of the third driving MOS tube Q4 and the fourth driving MOS tube Q6 (as shown in FIG. Figure 3The drain electrode is shown as the drain electrode) is also connected to the switch second unit 112, and the other end (as shown in FIG. Figure 3 The drain electrode is also connected to one end of a twelfth resistor R29, and another end of the twelfth resistor R29 is also connected to the cathode of a third diode D8. The third diode D8 may be a voltage-stabilizing diode, and its anode is also connected to the anode of the external power supply 10. Figure 3 The boost submodule 15 can directly transmit the boosted voltage to the gates of the first MOS transistor QP1 and the second MOS transistor QP4 in the second switch unit 112 through the resistor R27 and the diode ZD4, so that the first MOS transistor QP1 and the second MOS transistor QP4 in the second switch unit 112 can be turned on when the second switch unit 112 is turned on.

[0097] Specifically, the third driving unit 21 includes: a thirteenth resistor R45, a fourteenth resistor R42, a fifth driving MOS tube Q9, a sixth driving MOS tube Q10, a fifteenth resistor R32, and a fourth diode D10;

[0098] The 9th pin of the single-chip computer U2 is connected to both the thirteenth resistor R45 and the fourteenth resistor R42, the other end of the thirteenth resistor R45 is connected to one end of the fifth driving MOS tube Q9, the other end of the fourteenth resistor R42 is connected to one end of the sixth driving MOS tube Q10, the other ends of the fifth driving MOS tube Q9 and the sixth driving MOS tube Q10 are both grounded, the other ends of the fifth driving MOS tube Q9 and the sixth driving MOS tube Q10 are also connected to the switch fourth unit 114, the other ends of the fifth driving MOS tube Q9 and the sixth driving MOS tube Q10 are also connected to one end of the fifteenth resistor R32, the other end of the fifteenth resistor R32 is also connected to the negative electrode of the fourth diode D10, and the positive electrode of the fourth diode D10 is also connected to the positive electrode of the external power supply 10.

[0099] Furthermore, the third diode D8, the fourth diode D10 and the second pull-up resistor R30 are also grounded. Specifically, the third diode D8, the fourth diode D10 and the second pull-up resistor R30 can be grounded respectively. Figure 3 The capacitors C17, C18 and C19 are grounded. In this preferred embodiment, the capacitors can play a filtering role.

[0100] In this embodiment, when the switch unit 111 needs to be turned on, the single-chip microcomputer U2 sends a high level to Q7 in the first driving unit 19 through the sixth pin. At this time, Q7 is turned on and grounded, and the pull-up voltage through R31 is directly grounded through Q7. Then the voltage at R36 and R37 has no power supply voltage and no high level. At this time, Q3 and Q5 cannot be turned on because they are low levels. Therefore, the voltage of the external power supply 10 passes through D9 and R28 without passing through MOS tubes Q3 and Q5 to be grounded, but directly enters MOS tubes QP3 and QP4. At the same time, the gate of MOS tubes QP2 and QP3 obtained by the boost submodule is higher than the drain, and QP2 and QP3 are turned on.

[0101] Similarly, when the switch unit 111 needs to be turned off, the single-chip microcomputer U2 sends a low level to Q7 in the first driving unit 19 through the sixth pin. At this time, Q7 cannot be turned on, and the pull-up voltage through R31 cannot be grounded through Q7. The voltage at R36 and R37 is the pull-up voltage, and the MOS tubes Q3 and Q5 can be turned on. After the MOS tubes Q3 and Q5 are turned on, the voltage of the positive electrode of the external power supply 10 connected through R28 is directly grounded through the MOS tubes Q3 and Q5, and the voltage that makes the MOS tubes QP2 and QP3 turned on cannot be provided to the MOS tubes QP2 and QP3, and the MOS tubes QP2 and QP3 are both turned off. Therefore, the switch unit 111 is turned off.

[0102] Similarly, when the third pin of the single-chip microcomputer U2 sends a high level, the switch three is turned on, and when it sends a low level, the switch three is turned off; when the sixth pin of the single-chip microcomputer sends a high level, the switch two is turned on, and when it sends a low level, the switch two is turned off; when the ninth pin of the single-chip microcomputer sends a high level, the switch four is turned off, and when it sends a low level, the switch four is turned on. The specific principle is basically the same as the above description. No further description is given here.

[0103] Furthermore, the device for adjusting the positive and negative polarity of the vehicle charging clamp may also include: Figure 3 The diode D14, the diode D16, the diode D17, the resistor R54, the resistor R55, the resistor R57, the resistor R58, the diode D15, the diode D13, the diode D12, the resistor R48, the resistor R49, the resistor 50, the resistor R52, the resistor R51, the MOS tube Q13, the resistor R53, and the resistor R56 are connected as shown in FIG. Figure 3 As shown. In this preferred embodiment, the circuit can be protected by connecting these components. Specifically, resistors R54, R55, R57, and R58 are all gate resistors. Resistor R53 is the gate pull-up resistor of MOS tube Q13, and resistor R56 is the pull-down resistor. When MOS tube Q7 or MOS tube Q8 is turned off, MOS tube Q13 can be turned on.

[0104] Furthermore, the device for adjusting the positive and negative polarity of the vehicle charging clamp may also include: Figure 3 The connection relationship of D6, D7 and RP1 shown in the figure can play a role in circuit protection.

[0105] Further, in Figure 3 In the figure, BAT+ is the positive pole of the external power supply, BAT- is the negative pole of the external power supply, the left side of the pins of the microcontroller U2 are the first to eighth pins from top to bottom, and the right side are the ninth to sixteenth pins from bottom to top. The eighth resistor can be corresponded to R8+R 12 The ninth resistor can be represented by R9+R 14 17th resistor R 17 16th resistor R 16 , they form a bridge resistor.

[0106] Furthermore, the device for adjusting the positive and negative polarity of the vehicle charging clamp may also include: Figure 3 The resistor R shown 15 , resistor R 10 +R 13 , used to measure the voltage in the circuit and improve the circuit safety.

[0107] For further information, see Figure 4 , Figure 4 It is a schematic diagram of a module of a device for adjusting the positive and negative polarity of a car charging clip according to the third embodiment of the utility model, and the device for adjusting the positive and negative polarity of a car charging clip further comprises: a power supply module 25, one end of the power supply module 25 is connected to the first pin of the single-chip computer 1, and the other end of the power supply module 25 is used to connect to the positive electrode of the external power supply 10. The power supply module is used to supply power to the single-chip computer.

[0108] For details, please continue to see Figure 3 , Figure 3 In the embodiment, the power supply module 25 includes a diode D1, a capacitor C2 and a voltage regulator U1, wherein one end of the diode D1 is connected to the positive electrode of the external power supply, the other end of the diode D1 is connected to the voltage regulator U1 and one end of the capacitor C2, and the other end of the voltage regulator U1 is connected to the first pin of the single-chip computer U2. At the same time, the other end of the capacitor C2 is connected to the negative electrode of the power supply.

[0109] In this embodiment, after power is turned on, the power supply module 25 starts to work, and the power supply can be stabilized to 5V through the voltage stabilizer U1 to supply power to the single-chip microcomputer U2.

[0110] For further information, please see Figure 4 In an optional embodiment of the present invention, the vehicle starting device further comprises: an indicator light module 26, wherein the first port and the second port of the indicator light module 26 are respectively connected to different pins of the single chip microcomputer 1 (such as Figure 3 The third port of the indicator light module is used to connect the power supply module 25. The indicator light module 25 is used to light up to remind whether the car battery is connected to the external power supply.

[0111] Specifically, when the single chip microcomputer determines that the positive and negative polarities of the first connecting clip and the second connecting clip are correctly connected to the external power supply and are conductive, or when they are not conductive to the external power supply, the single chip microcomputer sends a control signal to the indicator light module to light up the indicator light module.

[0112] For further information, please see Figure 3 , in an optional embodiment of the present invention, the indicator light module includes a first light emitting diode D2, a first indicating resistor R1, a second light emitting diode D3 and a second indicating resistor R3;

[0113] One end of the first indicating resistor R1 is connected to the thirteenth pin of the single-chip computer, the other end of the first indicating resistor R1 is connected to one end of the first light-emitting diode D2, and the other end of the first light-emitting diode D2 is connected to the power supply module 25. Specifically, the other end of the first light-emitting diode D2 is connected to the voltage regulator U1 in the power supply module 25. One end of the second indicating resistor R3 is connected to the second pin of the single-chip computer 1, the other end of the second indicating resistor R3 is connected to one end of the second light-emitting diode D3, and the other end of the second light-emitting diode D3 is connected to the power supply module 25. Specifically, the other end of the second light-emitting diode D3 is connected to the voltage regulator U1 in the power supply module 25.

[0114] Specifically, the on and off states of the first light emitting diode and the second light emitting diode may be controlled by the high level or low level output by the single chip microcomputer U2.

[0115] The first indicating resistor R1 and the second indicating resistor R3 are both current limiting resistors, which ensure that the current flowing through the light emitting diode is below the rated current.

[0116] For example, the first light-emitting diode is used to light up a green light, and the second light-emitting diode is used to light up a red light. When it is detected that the first connecting clip and the second connecting clip are correctly connected to the positive and negative polarities of the external power supply and are turned on, the single-chip microcomputer sends a high-level signal to the first light-emitting diode and a low-level signal to the second light-emitting diode, then the first light-emitting diode lights up a green light, and the second light-emitting diode does not light up. When it is detected that the external power supply is not turned on, the single-chip microcomputer sends a low-level signal to the first light-emitting diode and a high-level signal to the second light-emitting diode, then the first light-emitting diode does not light up, and the second light-emitting diode lights up a red light.

[0117] For further information, please see Figure 4In an optional embodiment of the present invention, the vehicle starting device further includes: a sound reminder module 27, one end of the sound reminder module 27 is connected to a pin of the single-chip microcomputer 1, and the other end of the sound reminder module 27 is used to connect to the positive electrode of the external power supply 10; the sound reminder module 27 is used to give a sound reminder when the single-chip microcomputer detects a preset event.

[0118] Specifically, when a preset event is detected, the single chip microcomputer sends a signal to the sound reminder module 27 so that the sound reminder module performs a sound reminder.

[0119] Specifically, the preset event may be a short circuit, an external power supply, or an over-temperature of a car battery.

[0120] For further information, please see Figure 3 The sound reminder module 27 includes a first reminder resistor R5, a second reminder resistor R11, a third transistor Q1 and a buzzer BEE1, wherein one end of the first reminder resistor R5 is used to be connected to the positive electrode of the external power supply 10, the other end of the first reminder resistor R5 is connected to one end of the buzzer BEE1, and the other end of the buzzer BEE1 is connected to one end of the third transistor Q1 (such as Figure 3 The other end of the third transistor Q1 (as shown in the collector) is connected. Figure 3 The emitter is shown in FIG. 1 ) is connected to the negative electrode of the external power source 10, and another end of the third transistor Q1 (as shown in FIG. Figure 3 The base electrode is shown as the base electrode) is connected to one end of the second reminder resistor R11, and another end of the second reminder resistor R11 is connected to the fifth pin of the single chip microcomputer U2.

[0121] In this embodiment, the third resistor R5 and the fourth resistor R11 are current limiting resistors. When a preset event is detected, the single chip sends a high level signal to the base of the transistor Q1, thereby applying a forward voltage between the base and the emitter, the transistor Q1 is turned on, and the BEE1 buzzer emits a sound reminder.

[0122] The above implementation can automatically identify the positive and negative polarities of the car battery connected to the charging connection clip when the car emergency power supply is charging, and automatically switch the positive and negative polarities corresponding to the charging connection clip. There is no need to mark the positive and negative poles of the car emergency power supply in advance, nor is there any need to manually adjust the connection of the clip when the connection clip is connected to the car emergency power supply in reverse, thereby improving charging efficiency and safety.

[0123] The third embodiment of the utility model relates to a starting system, which includes an external power supply and the device for adjusting the positive and negative polarity of the vehicle charging clamp.

[0124] In an embodiment of the present invention, the device for adjusting the positive and negative polarity of the car charging clip is used together with an external power supply to charge the car battery, and no matter which of the two connecting clips is connected to the positive pole of the car battery and which is connected to the negative pole, the polarity corresponding to the connecting clip can be automatically determined, and the polarity can be automatically switched for charging. The problems of high cost and large insertion loss are solved by reducing the power consumption and insertion loss when the detection reference signal is sent and received, thereby reducing costs. The technical principle is the same as described above and will not be repeated here.

[0125] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A device for adjusting the positive and negative polarity of a car charging clamp, characterized in that: The device for adjusting the positive and negative polarity of the automobile charging clip comprises: a polarity judgment module, a polarity conversion module, a first connecting clip and a second connecting clip; The polarity judgment module includes an eighth resistor, a ninth resistor, a sixteenth resistor, a seventeenth resistor and a single-chip computer, wherein the eighth pin of the single-chip computer is respectively connected to one end of the ninth resistor and the seventeenth resistor, the other end of the seventeenth group of resistors is used to be connected to the negative electrode of the external power supply, the other end of the ninth resistor is connected to the first input end of the polarity conversion module, the other end of the ninth resistor is also used to be connected to the positive electrode of the external power supply, the eleventh pin of the single-chip computer is respectively connected to one end of the eighth resistor and the sixteenth resistor, the other end of the sixteenth resistor is used to be connected to the negative electrode of the external power supply, and the other end of the eighth resistor is connected to the second connecting clip; The polarity determination module is used to determine the positive and negative poles to which the first connection clip and the second connection clip are connected when they are respectively connected to the car battery; The second input terminal, the third input terminal, and the fourth input terminal of the polarity conversion module are respectively connected to different pins of the single-chip microcomputer, and the two output terminals of the polarity conversion module are both connected to the first connecting clip and the second connecting clip; The polarity conversion module is used to control the positive and negative polarity adjustment according to the judgment result of the polarity judgment module, so that the first connection clip and the second connection clip are respectively connected to the positive pole and the negative pole of the external power supply, or the first connection clip and the second connection clip are respectively connected to the negative pole and the positive pole of the external power supply; The first connecting clip and the second connecting clip are used to connect two poles of a car battery respectively.

2. The device for adjusting the positive and negative polarity of a car charging clamp as claimed in claim 1, characterized in that: The polarity conversion module includes a boost submodule, a drive submodule, a positive submodule and a negative submodule, wherein the drive submodule includes a first drive unit, a second drive unit and a third drive unit, the positive submodule includes a switch unit 1 and a switch unit 2, and the negative submodule includes a switch unit 3 and a switch unit 4; The polarity conversion module is used to control the switch unit 1 and the switch unit 3 to be turned on, and control the switch unit 2 and the switch unit 4 to be turned off, or control the switch unit 2 and the switch unit 4 to be turned on, and control the switch unit 1 and the switch unit 3 to be turned off according to the judgment result of the polarity judgment module; The input end of the first driving unit is connected to the third pin of the single chip microcomputer, and the output end of the first driving unit is respectively connected to the first port end of the switch unit 1 and the first port end of the switch unit 3; The input end of the second driving unit is connected to the sixth pin of the single chip microcomputer, and the output end of the second driving unit is connected to the first port end of the second switch unit; The input end of the third driving unit is connected to the ninth pin of the single chip microcomputer, and the output end of the third driving unit is connected to the first port of the fourth switch unit; The second ports of the switch unit 1 and the switch unit 2 are both connected to the positive electrode of the external power supply, the third ports of the switch unit 1 and the switch unit 2 are both connected to the ninth resistor, the fourth ports of the switch unit 1 and the switch unit 2 are both connected to one end of the boost submodule, the second ports of the switch unit 3 and the switch unit 4 are both connected to the negative electrode of the external power supply, the fifth port of the switch unit 1 and the third port of the switch unit 4 are both connected to the second connection clamp, and the fifth port of the switch unit 2 and the third port of the switch unit 3 are both connected to the first connection clamp; The other end of the boost submodule is also connected to the positive electrode of the external power supply; The boost submodule is used for boosting the circuits of the switch unit 1 and the switch unit 2.

3. The device for adjusting the positive and negative polarity of a car charging clamp as claimed in claim 2, characterized in that: The first driving unit includes: a first resistor, a second resistor, a first triode, a first pull-up resistor, a third resistor, a fourth resistor, a first driving MOS transistor, a second driving MOS transistor, an eighteenth resistor, a first diode, a fifth resistor, a sixth resistor, a third driving MOS transistor, a fourth driving MOS transistor, a seventh resistor, and a second diode; One end of the first resistor is connected to the third pin of the single-chip microcomputer, the other end of the first resistor is respectively connected to the second resistor and one end of the first transistor, the other end of the second resistor is grounded, the other end of the first transistor is grounded, another end of the first transistor is connected to one end of the first pull-up resistor, and the other end of the first pull-up resistor is connected to the positive electrode of the external power supply; The further end of the first triode is also connected to the third resistor and the fourth resistor, the other end of the third resistor is connected to one end of the first driving MOS tube, the other end of the fourth resistor is connected to one end of the second driving MOS tube, the other ends of the first driving MOS tube and the second driving MOS tube are both grounded, the further ends of the first driving MOS tube and the second driving MOS tube are also connected to the switch first unit, the further ends of the first driving MOS tube and the second driving MOS tube are also connected to one end of an eighteenth resistor, the further end of the eighteenth resistor is also connected to the negative electrode of the first diode, and the positive electrode of the first diode is also connected to the positive electrode of the external power supply; The further end of the first triode is also connected to both the fifth resistor and the sixth resistor, the other end of the fifth resistor is connected to one end of the third driving MOS tube, the other end of the sixth resistor is connected to one end of the fourth driving MOS tube, the other ends of the third driving MOS tube and the fourth driving MOS tube are both grounded, the further ends of the third driving MOS tube and the fourth driving MOS tube are also connected to the switch unit three, the further ends of the third driving MOS tube and the fourth driving MOS tube are also connected to one end of the seventh resistor, the further end of the seventh resistor is also connected to the negative electrode of the second diode, and the positive electrode of the second diode is also connected to the positive electrode of the external power supply; The second driving unit includes: an eighth resistor, a ninth resistor, a second triode, a second pull-up resistor, a tenth resistor, an eleventh resistor, a third driving MOS transistor, a fourth driving MOS transistor, a twelfth resistor, and a third diode; One end of the eighth resistor is connected to the third pin of the single-chip computer, the other end of the eighth resistor is respectively connected to the ninth resistor and one end of the second triode, the other end of the ninth resistor is grounded, the other end of the second triode is grounded, another end of the second triode is connected to one end of the second pull-up resistor, the other end of the second pull-up resistor is connected to the positive electrode of the external power supply, the other end of the second triode is also connected to the tenth resistor and the eleventh resistor, the other end of the tenth resistor is connected to one end of the third drive MOS tube, the other end of the eleventh resistor is connected to one end of the fourth drive MOS tube, the other ends of the third drive MOS tube and the fourth drive MOS tube are both grounded, another end of the third drive MOS tube and the fourth drive MOS tube is also connected to the second switch unit, the other end of the third drive MOS tube and the fourth drive MOS tube is also connected to one end of the twelfth resistor, and the other end of the twelfth resistor is also connected to the negative electrode of the third diode; The third driving unit includes: a thirteenth resistor, a fourteenth resistor, a fifth driving MOS tube, a sixth driving MOS tube, a fifteenth resistor, and a fourth diode; The ninth pin of the single-chip computer is connected to the thirteenth resistor and the fourteenth resistor, the other end of the thirteenth resistor is connected to one end of the fifth driving MOS tube, the other end of the fourteenth resistor is connected to one end of the sixth driving MOS tube, the other ends of the fifth driving MOS tube and the sixth driving MOS tube are both grounded, the other ends of the fifth driving MOS tube and the sixth driving MOS tube are also connected to the switch unit four, the other ends of the fifth driving MOS tube and the sixth driving MOS tube are also connected to one end of the fifteenth resistor, the other end of the fifteenth resistor is also connected to the negative electrode of the fourth diode, and the positive electrode of the fourth diode is also connected to the positive electrode of the external power supply.

4. The device for adjusting the positive and negative polarity of a car charging clamp as claimed in claim 2, characterized in that: The switch unit 2 includes: a first MOS tube, a second MOS tube, a first switch resistor, and a second switch resistor; one end of the first MOS tube and the second MOS tube are both connected to the first connection clip, the other ends of the first MOS tube and the second MOS tube are both connected to the positive electrode of the external power supply, another end of the first MOS tube is connected to one end of the first switch resistor, another end of the second MOS tube is connected to one end of the second switch resistor, and the other ends of the first switch resistor and the second switch resistor are both connected to the second driving unit; The switch unit 4 includes a third MOS tube, a fourth MOS tube, a third switch resistor and a fourth switch resistor; one end of the third MOS tube and the fourth MOS tube are both connected to the second connecting clip, the other ends of the third MOS tube and the fourth MOS tube are both connected to the negative electrode of the external power supply, another end of the third MOS tube is connected to one end of the third switch resistor, another end of the fourth MOS tube is connected to one end of the fourth switch resistor, and the other ends of the third switch resistor and the fourth switch resistor are both connected to the third driving unit; The switch unit 1 includes: a fifth MOS tube, a sixth MOS tube, a fifth switch resistor and a sixth switch resistor; one end of the fifth MOS tube and the sixth MOS tube are both connected to the second connection clip, the other ends of the fifth MOS tube and the second MOS tube are both connected to the positive electrode of the external power supply, another end of the fifth MOS tube is connected to one end of the fifth switch resistor, another end of the sixth MOS tube is connected to one end of the sixth switch resistor, and the other ends of the fifth switch resistor and the sixth switch resistor are both connected to the first driving unit; The switch three unit includes: a seventh MOS tube, an eighth MOS tube, a seventh switch resistor and an eighth switch resistor; one end of the seventh MOS tube and the eighth MOS tube are both connected to the first connecting clip, the other ends of the seventh MOS tube and the eighth MOS tube are both connected to the negative electrode of the external power supply, another end of the seventh MOS tube is connected to one end of the seventh switch resistor, another end of the eighth MOS tube is connected to one end of the eighth switch resistor, and the other ends of the seventh switch resistor and the eighth switch resistor are both connected to the first driving unit.

5. The device for adjusting the positive and negative polarity of a vehicle charging clamp according to any one of claims 1 to 4, characterized in that: The device for adjusting the positive and negative polarity of the car charging clip also includes: a power supply module, one end of the power supply module is connected to the first pin of the single-chip microcomputer, and the other end of the power supply module is used to connect to the positive electrode of the external power supply.

6. The device for adjusting the positive and negative polarity of a car charging clamp as claimed in claim 5, characterized in that: The vehicle starting device further comprises: an indicator light module, wherein the first port and the second port of the indicator light module are respectively connected to different pins of the single chip microcomputer, and the third port of the indicator light module is connected to the power supply module; The indicator light module is used to light up to remind whether the vehicle battery is connected to the external power supply.

7. The device for adjusting the positive and negative polarity of a car charging clamp as claimed in claim 6, characterized in that: The indicator light module includes a first light emitting diode, a first indicating resistor, a second light emitting diode and a second indicating resistor; One end of the first indicating resistor is connected to the thirteenth pin of the single chip computer, the other end of the first indicating resistor is connected to one end of the first light emitting diode, and the other end of the first light emitting diode is connected to the power supply module; One end of the second indicating resistor is connected to the second pin of the single chip microcomputer, the other end of the second indicating resistor is connected to one end of the second light emitting diode, and the other end of the second light emitting diode is connected to the power supply module 25 .

8. The device for adjusting the positive and negative polarity of a vehicle charging clamp according to any one of claims 1 to 4, characterized in that: The vehicle starting device further comprises: a sound reminder module, one end of which is connected to a pin of the single chip computer, and the other end of which is used to connect to the positive electrode of the external power supply; The sound reminder module is used to make a sound reminder when the single chip microcomputer detects the occurrence of a preset event.

9. The device for adjusting the positive and negative polarity of a car charging clamp as claimed in claim 8, characterized in that: The sound reminder module includes a first reminder resistor, a second reminder resistor, a third transistor and a buzzer, wherein one end of the first reminder resistor is used to be connected to the positive electrode of the external power supply, the other end of the first reminder resistor is connected to one end of the buzzer, the other end of the buzzer is connected to one end of the third transistor, the other end of the third transistor is connected to the negative electrode of the external power supply, another end of the third transistor is connected to one end of the second reminder resistor, and another end of the reminder resistor is connected to the fifth pin of the single-chip computer.

10. A starting system, characterized in that: The starting system comprises an external power supply and a device for adjusting the positive and negative polarity of the vehicle charging clamp as claimed in any one of claims 1 to 9.

Images