Vehicle safety ignition device and control method and equipment thereof

Abstract

The invention discloses a vehicle safety ignition device and a control method and equipment thereof, and relates to the technical field of vehicle safety ignition, the device comprises four cables, six switches, six rectifier modules, four polarity detection modules and a main control module, the six rectifier modules supply power to the main control module, and the four polarity detection modules supply power to the main control module. The main control module determines the polarity of the electrodes connected with the four cables based on the output voltage of the four polarity detection modules, and controls the closing state of the six switches based on the polarity of the electrodes connected with the four cables. The polarity of the electrodes connected with the four cables is automatically detected, the six switches are further automatically controlled, it is ensured that the positive electrode of the rescue vehicle storage battery can be correctly connected with the positive electrode of the rescued vehicle storage battery, the negative electrode of the rescue vehicle storage battery can be correctly connected with the negative electrode of the rescued vehicle storage battery, accidents are avoided, and the service life of the rescue vehicle storage battery is prolonged. And the safety of the vehicle in the firing process is improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle safety jump-starting, and particularly to a vehicle safety jump-starting device, its control method, and equipment. Background Art

[0002] Currently, although new energy vehicles (such as electric vehicles) are developing relatively fast in China, globally, traditional energy vehicles (such as fuel vehicles) still account for a large proportion, especially in some special application scenarios, such as off-road and engineering fields. The battery used for starting in traditional fuel vehicles is generally a lead-acid battery, and after being used for a certain period of time, the battery often decays. At this time, the fuel vehicle cannot start normally and becomes a faulty vehicle (referred to as the vehicle to be rescued). In order to start the vehicle to be rescued when a new battery cannot be replaced in time, an external power source is required. The commonly used method is to use jumper cables to output electricity from another normally operating vehicle (referred to as the rescue vehicle) to the vehicle to be rescued, so that the vehicle to be rescued can start normally. The commonly available jumper cables on the market are generally two cables with a clip at each end. When in use, the clips at both ends of one cable (usually red) are respectively clipped to the positive electrodes of the batteries of the two vehicles (i.e., the rescue vehicle and the vehicle to be rescued), and the clips at both ends of the other cable (usually black) are respectively clipped to the negative electrodes of the batteries of the two vehicles. At this time, the rescue vehicle can deliver electricity to the vehicle to be rescued, that is, the battery of the rescue vehicle starts to charge the battery of the vehicle to be rescued. After the vehicle to be rescued starts normally, the cable connection can be disconnected.

[0003] Although the above vehicle jump-starting process seems relatively simple, in specific implementation, various unexpected situations may occur due to various reasons. For example, in an environment with relatively dim light, the electrode marks are covered by a large amount of dust, poor eyesight, or nervousness, etc., may all cause the red cable and the black cable to be connected reversely, resulting in the series connection and short circuit of the two batteries, which may cause serious accidents such as fire. Summary of the Invention

[0004] The purpose of the present application is to provide a vehicle safety jump-starting device, its control method, and equipment, ensuring that the positive electrode of the battery of the rescue vehicle can be correctly connected to the positive electrode of the battery of the vehicle to be rescued, and the negative electrode of the battery of the rescue vehicle can be correctly connected to the negative electrode of the battery of the vehicle to be rescued, avoiding accidents and improving the safety of the vehicle jump-starting process.

[0005] To achieve the above purpose, the present application provides the following solutions:

[0006] In the first aspect, the present application provides a vehicle safety jump-starting device, and the vehicle safety jump-starting device includes: 4 cables, 6 switches, 6 rectification modules, 4 polarity detection modules, and a main control module;

[0007] Four cables correspond to four electrodes one by one, and the first ends of the cables are connected to the electrodes; the four electrodes are the positive and negative poles of the battery of the rescue vehicle and the positive and negative poles of the battery of the vehicle to be rescued;

[0008] Six switches correspond to six combinations obtained by randomly combining the four cables. The first end of the switch is connected to the second end of the first cable in the combination, and the second end of the switch is connected to the second end of the second cable in the combination; the switch is used to connect the first cable and the second cable in the combination when it is in the closed state;

[0009] Six rectifier modules correspond to six combinations obtained by randomly combining the four cables. The first input end of the rectifier module is connected to the second end of the first cable in the combination, and the second input end of the rectifier module is connected to the second end of the second cable in the combination. The first output ends of the six rectifier modules are connected to form a total positive output end, and the second output ends of the six rectifier modules are connected to form a total negative output end. The total positive output end and the total negative output end are both connected to the main control module; the total positive output end and the total negative output end are used to output direct current to supply power to the main control module;

[0010] Four polarity detection modules correspond to the four cables. The input ends of the polarity detection modules are respectively connected to the second ends of the cables, the total positive output end and the total negative output end, and the output ends of the polarity detection modules are connected to the main control module;

[0011] The main control module is respectively connected to the control ends of the six switches; the main control module is used to determine the polarity of the electrode connected to the cable based on the output voltage of the polarity detection module, and control the first target switch and the second target switch to close based on the polarities of the electrodes connected by the four cables, so that the positive pole of the battery of the rescue vehicle is connected to the positive pole of the battery of the vehicle to be rescued, and the negative pole of the battery of the rescue vehicle is connected to the negative pole of the battery of the vehicle to be rescued; wherein, the polarity includes positive and negative; the first target switch is the switch corresponding to the combination composed of the two cables whose connected electrodes have the positive polarity, and the second target switch is the switch corresponding to the combination composed of the two cables whose connected electrodes have the negative polarity.

[0012] In a second aspect, the present application provides a control method for a vehicle safety jump-starting device, which is applied to the above-mentioned vehicle safety jump-starting device. The control method of the vehicle safety jump-starting device includes:

[0013] Obtain the output voltages of the four polarity detection modules;

[0014] Determine the polarities of the electrodes connected to the four cables based on the output voltages of the four polarity detection modules, and control the closing of the first target switch and the second target switch based on the polarities of the electrodes connected to the four cables, so that the positive electrode of the rescue vehicle battery is connected to the positive electrode of the vehicle to be rescued battery, and the negative electrode of the rescue vehicle battery is connected to the negative electrode of the vehicle to be rescued battery; the first target switch is a switch corresponding to the combination formed by the two cables with the positive electrode polarity of the connected electrodes, and the second target switch is a switch corresponding to the combination formed by the two cables with the negative electrode polarity of the connected electrodes.

[0015] In a third aspect, the present application provides a computer device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor executes the computer program to implement the control method of the vehicle safety jump-starting device described above.

[0016] According to the specific embodiments provided by the present application, the present application has the following technical effects:

[0017] The present application provides a vehicle safety jump-starting device, its control method, and device, including: four cables, six switches, six rectification modules, four polarity detection modules, and a main control module. The six switches and six rectification modules correspond one by one to the six combinations obtained by randomly combining the four cables. The four polarity detection modules correspond one by one to the four cables. The six rectification modules supply power to the main control module. The main control module determines the polarities of the electrodes connected to the four cables based on the output voltages of the four polarity detection modules, and controls the closing of the first target switch and the second target switch among the six switches based on the polarities of the electrodes connected to the four cables, so that the positive electrode of the rescue vehicle battery is connected to the positive electrode of the vehicle to be rescued battery, and the negative electrode of the rescue vehicle battery is connected to the negative electrode of the vehicle to be rescued battery. The present application automatically detects the polarities of the electrodes connected to the four cables, and further automatically controls the switches to ensure that the positive electrode of the rescue vehicle battery can be correctly connected to the positive electrode of the vehicle to be rescued battery, and the negative electrode of the rescue vehicle battery is connected to the negative electrode of the vehicle to be rescued battery, avoiding accidents and improving the safety of the vehicle jump-starting process. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic diagram of a short circuit caused by incorrect connection of ordinary jump-starting cables.

[0020] Figure 2Schematic circuit diagram of the rectification module for rectifying direct current with uncertain polarity into direct current with definite polarity provided in Embodiment 1 of the present application.

[0021] Figure 3 Schematic circuit diagram of the complete circuit composed of 6 rectification modules for rectifying direct current with uncertain polarity into direct current with definite polarity provided in Embodiment 1 of the present application.

[0022] Figure 4 Schematic circuit diagram of the polarity detection module for determining the polarity of the electrode connected to Cable A provided in Embodiment 1 of the present application.

[0023] Figure 5 Schematic diagram for analyzing the problems that will occur if a non-isolated voltage stabilizing module is used provided in Embodiment 1 of the present application.

[0024] Figure 6 Schematic diagram of a certain electrode being disconnected provided in Embodiment 1 of the present application.

[0025] Figure 7 Schematic circuit connection diagram of the vehicle safety jump-starting device provided in Embodiment 1 of the present application.

[0026] Figure 8 Schematic diagram of the control logic flow of the vehicle safety jump-starting device provided in Embodiment 1 of the present application.

[0027] Figure 9 Schematic diagram of the connection test of the vehicle safety jump-starting device provided in Embodiment 1 of the present application.

[0028] Figure 10 Schematic diagram of the flow of the control method of the vehicle safety jump-starting device provided in Embodiment 2 of the present application.

[0029] Figure 11 Schematic diagram of the structure of a computer device provided in Embodiment 3 of the present application. Specific implementation manners

[0030] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.

[0031] Embodiment 1

[0032] This embodiment provides a vehicle safety jump-starting device, which includes: 4 cables, 6 switches, 6 rectification modules, 4 polarity detection modules and a main control module.

[0033] Four cables correspond to four electrodes one by one. The first ends of the cables are connected to the electrodes. The four electrodes are the positive and negative poles of the battery of the rescue vehicle and the positive and negative poles of the battery of the vehicle to be rescued.

[0034] Six switches correspond to six combinations obtained by randomly combining the four cables. The first end of the switch is connected to the second end of the first cable in the combination, and the second end of the switch is connected to the second end of the second cable in the combination. The switch is used to connect the first cable and the second cable in the combination when it is in the closed state.

[0035] Six rectifier modules correspond to six combinations obtained by randomly combining the four cables. The first input end of the rectifier module is connected to the second end of the first cable in the combination, and the second input end of the rectifier module is connected to the second end of the second cable in the combination. The first output ends of the six rectifier modules are connected to form a total positive output end, and the second output ends of the six rectifier modules are connected to form a total negative output end. The total positive output end and the total negative output end are both connected to the main control module. The total positive output end and the total negative output end are used to output direct current to supply power to devices such as the main control module.

[0036] Four polarity detection modules correspond to the four cables one by one. The input ends of the polarity detection modules are respectively connected to the second ends of the cables, the total positive output end, and the total negative output end. The output ends of the polarity detection modules are connected to the main control module.

[0037] The main control module is respectively connected to the control ends of the six switches. The main control module is used to determine the polarity of the electrode connected to the cable based on the output voltage of the polarity detection module, and control the first target switch and the second target switch to close based on the polarities of the electrodes connected to the four cables, so that the positive pole of the battery of the rescue vehicle is connected to the positive pole of the battery of the vehicle to be rescued, and the negative pole of the battery of the rescue vehicle is connected to the negative pole of the battery of the vehicle to be rescued. Among them, the polarity includes the positive pole and the negative pole. The first target switch is the switch corresponding to the combination composed of the two cables with the polarity of the connected electrode being the positive pole, and the second target switch is the switch corresponding to the combination composed of the two cables with the polarity of the connected electrode being the negative pole.

[0038] The vehicle safety jump-starting device in this embodiment is provided with four cables, six switches, six rectifier modules, four polarity detection modules and a main control module. First, the first ends of the four cables are randomly connected to the four electrodes one by one. Subsequently, the polarities of the electrodes connected to the four cables can be determined through the polarity detection module and the main control module, and the switches are further controlled to ensure that the positive pole of the battery of the rescue vehicle can be correctly connected to the positive pole of the battery of the vehicle to be rescued, and the negative pole of the battery of the rescue vehicle is connected to the negative pole of the battery of the vehicle to be rescued, avoiding accidents and improving the safety of the vehicle jump-starting process.

[0039] Although the vehicle ignition process seems to be relatively simple, various unexpected situations may occur during its implementation due to various reasons, such as a dim light environment, the electrode mark is covered with a lot of dust, poor eyesight or emotional tension, which may cause the red cable and the black cable to be connected in reverse, resulting in similar Figure 1 The connection situation shown, that is, two batteries are connected in series and short-circuited, may cause serious accidents such as fire, so a vehicle safety ignition device that can prevent these situations from happening and can automatically jump to the correct connection is needed.

[0040] The related ignition devices currently on the market are either simply two cables without any protection, or several ignition wires involving safety functions. Generally, technologies such as fuse blowing or reverse connection protection are used. The connection can only be cut off when the connection is reversed, but it cannot automatically jump to the correct connection. Or it is a starting power supply device with a battery but only reverse connection protection. The starting power supply device can only cut off the connection when the connection is reversed, but it cannot automatically jump to the correct connection. This starting power supply device is more suitable for occasions such as auto repair shops and professional vehicle rescue units where multiple and short-term use is often required. It is not suitable for long-term carrying in ordinary passenger vehicles. Because in summer, when ordinary passenger vehicles are parked outdoors, the car compartment will be at high temperature due to exposure to the sun. At this time, placing a starting power supply device equipped with a large-capacity lithium battery is itself a safety hazard. Even electric vehicles with lithium battery cooling and protection devices are often reported to spontaneously combust without a collision, not to mention this type of starting power supply device with limited size.

[0041] Obviously, the current related vehicle ignition devices cannot automatically jump to the correct connection, so we try to design and make a vehicle intelligent safety ignition device that can connect 4 clips to 4 electrodes at will, automatically identify the positive and negative poles and automatically complete the corresponding cable connection. At the same time, it is required that the power required for its operation is provided by the vehicle battery, and there is no need to bring its own power supply to avoid the risk of spontaneous combustion caused by being in a high temperature environment for a long time. To further improve safety, it is required that after removing the clip from the electrode, it can also automatically detect and disconnect the cable with the removed clip from other cables in time to prevent it from accidentally touching other electrodes or metal on the vehicle to cause accidents and cause danger. In order to facilitate use in dim light, high dust and emergency environments, we try to make the vehicle intelligent safety ignition device be able to use it by simply taking any clip and connecting any electrode that has not been connected. It is convenient to use in a dim light environment when the electrode logo or color covered with a lot of dust cannot be accurately identified. It is more friendly to people with poor eyesight, poor hands-on ability or poor logical thinking, and can also ensure that it is not easy to make mistakes in tense situations to avoid danger.

[0042] In this embodiment, the cable can be a cable or the like. The first end of the cable can have a clip, and the clip is clamped on the electrode to realize the connection between the first end of the cable and the electrode.

[0043] The design method of the vehicle intelligent safety jump-starting device in this embodiment is as follows:

[0044] In order to be able to perform automatic cross-connection of 4 cables, a connection device is required between every 2 cables. In terms of type, commonly used electrical control connection devices in general electrical automation control include relays, contactors, etc. In this embodiment, normally open DC relays are selected. In terms of quantity, since there are 4 cables and the polarities of the electrodes connected to each cable are unknown in advance and pairwise connection is required, 6 normally open DC relays need to be set. In order to be able to achieve automatic control, a circuit capable of completing logical judgment needs to be installed. However, if a hardware logic circuit that can achieve the corresponding function is used, it needs to be redesigned. Therefore, a low-power computing device such as a single-chip microcomputer is selected as the main control module, and the automatic control function is completed through the software running in it. Similarly, because the polarities of the electrodes connected to the cables cannot be predicted, but the power supply of the main control module requires a clear positive and negative pole, so in this embodiment, the unknown-polarity direct current on the cable is roughly regarded as alternating current, and then the mature technology of converting alternating current to direct current (through a rectification module) can be used to convert it into direct current with a clear polarity (only with a voltage drop of less than 1V), and after stepping down, it is supplied to the main control module for use. The number of rectification modules is the same as that of the normally open DC relays, which is also 6.

[0045] (1) Complete the cross-connection.

[0046] In this embodiment, 6 switches are designed, and the 6 switches correspond one by one to the 6 combinations obtained by randomly combining 4 cables. The 4 cables are respectively denoted as the first cable, the second cable, the third cable, and the fourth cable. Then the 6 combinations are the combination composed of the first cable and the second cable, the combination composed of the first cable and the third cable, the combination composed of the first cable and the fourth cable, the combination composed of the second cable and the third cable, the combination composed of the second cable and the fourth cable, and the combination composed of the third cable and the fourth cable. For each combination, the first end of the switch is connected to the second end of the first cable in the combination, and the second end of the switch is connected to the second end of the second cable in the combination. The switch is used to connect the first cable and the second cable in the combination when it is in the closed state. At this time, the electrode connected to the first cable in the combination is connected to the electrode connected to the second cable in the combination.

[0047] Among them, the switch can be a normally open DC relay. Of course, other types of switches can also be used as long as they have the function of being controlled by the main control module to be disconnected or closed. This embodiment does not make any restrictions on this.

[0048] (2) Determine the power supply polarity.

[0049] Because the design requirement is to achieve the goal of being able to connect arbitrarily without distinguishing the positive and negative poles of the battery, among the 4 cables of the vehicle intelligent safety jump-start device, it is impossible to predict whether a specific cable is connected to the positive or negative pole. However, devices such as the main control module all require a clear positive and negative pole to be connected to their input terminals, that is, they can only accept a power supply with the correct polarity and voltage range. Reverse connection cannot work and may even burn out. Therefore, it is necessary to convert the power supply with uncertain polarity into a power supply with a clear polarity for power supply.

[0050] Although the battery outputs direct current, due to the uncertainty of the cable connection, there are multiple possibilities. Here, taking any two cables (marked as A and B) as an example, the possible polarity combinations and potential differences are shown in Table 1 below.

[0051] Table 1 Possible polarity combinations and potential differences

[0052] A B Potential difference of A to B + + <![CDATA[0 to (V A -V B )]]> + - <![CDATA[V A > - + <![CDATA[-V B > - - <![CDATA[0 to (V A -V B )]]>

[0053] In Table 1, V A is the potential of A, and V B is the potential of B.

[0054] Of course, Table 1 above only shows the positive and negative pole connection conditions of the cables and the theoretical potential difference. In fact, if not in the same circuit (that is, A and B are not connected to two electrodes of the same battery), no current will be generated. That is, in the first and fourth cases in Table 1, there is no current. For the second and third cases, it depends on whether A and B are connected to two electrodes of the same battery. If so, current can be output. Otherwise, no current will be generated before the normally open DC relay closes. If in the same circuit, it can be roughly regarded as an alternating current with a manually controlled current direction, then the relatively mature rectification module can be used to rectify it. Here, because once the two cables A and B are connected, the direction of the potential difference will not change with time, so the rectification module selects a full-bridge rectification circuit that can utilize currents in two directions and is relatively stable. Its circuit schematic diagram is as Figure 2 shown.

[0055] The above is only the case of 2 cables. In fact, there are 4 cables. A rectification module needs to be set between every 2 cables. The output terminals with determined positive and negative poles in all rectification modules can be connected in parallel. The complete circuit constructed by four wires and six groups is as Figure 3 shown, Figure 3 where 1, 2, 3, and 4 represent the 4 cables.

[0056] Due to the existence of the full-bridge rectifier circuit, as long as the reverse breakdown voltage of the rectifier diodes in the full-bridge rectifier circuit is not exceeded, there will be no backflow to the non-output part and the lower-voltage part (only the reverse leakage caused by the rectifier diodes themselves, which is only about 0.1V in actual measurement and can be ignored). Therefore, as long as a pair of cables is connected to the same circuit (i.e., connected to the two poles of the same battery) in the whole circuit, direct current with a definite polarity can be output to supply power to devices such as the main control module.

[0057] At this time, in this embodiment, the 6 rectification modules correspond one by one to the 6 combinations obtained by randomly combining 4 cables. For each combination, the first input terminal of the rectification module is connected to the second end of the first cable in the combination, the second input terminal of the rectification module is connected to the second end of the second cable in the combination, the first output terminals of the 6 rectification modules are connected together to form the total positive output terminal, the second output terminals of the 6 rectification modules are connected together to form the total negative output terminal, both the total positive output terminal and the total negative output terminal are connected to the main control module, and the total positive output terminal and the total negative output terminal are used to output direct current to supply power to the main control module.

[0058] Among them, the rectification module can be a full-bridge rectifier circuit. The full-bridge rectifier circuit includes a first diode, a second diode, a third diode, and a fourth diode. The cathode of the first diode is connected to the anode of the second diode, the cathode of the second diode is connected to the cathode of the third diode, the anode of the third diode is connected to the cathode of the fourth diode, and the anode of the fourth diode is connected to the anode of the first diode. The connection end of the first diode and the second diode is the first input terminal of the rectification module, the connection end of the second diode and the third diode is the first output terminal of the rectification module, the connection end of the third diode and the fourth diode is the second input terminal of the rectification module, and the connection end of the fourth diode and the first diode is the second output terminal of the rectification module.

[0059] (3) Positive and negative pole detection.

[0060] If the positive poles (or two negative poles) of two batteries are to be correctly connected, it is necessary to accurately detect whether a specific cable among the 4 cables is connected to the positive pole or the negative pole. With the power supply with definite positive and negative poles obtained by the output of the 6 rectification modules before (i.e., the total positive output terminal and the total negative output terminal), in addition to being able to supply power to devices such as the main control module, this power supply with definite positive and negative poles also has an important function, that is, regarding it as a polarity reference benchmark. As Figure 2 shown, if A is connected to the positive pole, then the potential difference (or voltage drop) between it and the first output terminal of the rectification module (i.e., the positive output terminal, also called the positive pole of the output terminal) is relatively small, less than 0.6V in actual measurement under no-load conditions, while the potential difference between it and the second output terminal of the rectification module (i.e., the negative output terminal, also called the negative pole of the output terminal) is close to the potential difference between A and B, about V in actual measurement under no-load conditions. A-0.6V. If terminal A is connected to the negative electrode, the situation is exactly the opposite.

[0061] Currently, the relatively mature technologies for detecting the positive and negative electrodes mainly include the dual-integral ADC method for measuring voltage values similar to that on a digital multimeter, or some ADC circuits that require components such as voltage followers, adders, and comparators (usually with a resistor voltage division circuit and a reference power supply). If built with basic components, it is relatively complex, and the stability and reliability cannot be guaranteed. Moreover, an ADC module is required. If a finished voltage measurement module is used, since only the positive and negative electrodes need to be detected here without obtaining the specific voltage value, some functions will be wasted and the overall cost will be relatively high. The overall cost is relatively high because 4 cables need to be detected separately, that is, 4 voltage measurement modules are required. Therefore, other simple module components with relatively low cost are prepared to design a stable and reliable positive and negative electrode detection circuit (i.e., a polarity detection module).

[0062] Because many digital circuits for measuring voltage were found to use ADCs during the previous literature review, and currently, many microcontrollers come with varying numbers of built-in ADC interfaces. Therefore, an attempt is made to use these ADC interfaces on the main control module and add a module at the front end that can output a voltage signal to the ADC interface to form a positive and negative electrode detection circuit. Initially, referring to the light-emitting diode circuit for detecting the positive and negative electrodes for human eye recognition (the light emits when connected in the forward direction, otherwise, either it does not emit or the other reversely connected diode emits light), an attempt was made to use an optocoupler. However, since many commercially available optocoupler modules require a relatively narrow range of input operating voltage, a voltage stabilization module also needs to be provided. According to the analysis and actual measurement of the potential difference of the previous rectification module, it was found that, taking the power supply with a clear positive and negative electrode after rectification as a reference, the voltage stabilization module can be directly used to output a voltage signal to an ADC interface of the microcontroller, as Figure 4 shown.

[0063] Two wide-input voltage regulation modules are used for each cable. The positive input terminal of the first voltage regulation module (detecting whether cable A is connected to the negative electrode) is connected to the positive pole of the rectified power supply (i.e., the first output terminal of the rectification module), and the negative input terminal of the second voltage regulation module (detecting whether cable A is connected to the positive electrode) is connected to the negative pole of the rectified power supply (i.e., the second output terminal of the rectification module), serving as the reference positive and negative poles respectively. The negative input terminal of the first voltage regulation module and the positive input terminal of the second voltage regulation module are connected together as the detection interface and connected to cable A whose positive and negative poles need to be determined. The negative output terminals of the two voltage regulation modules are both connected to the GND interface (i.e., the common ground wire, negative pole) of the main control module, and the positive output terminals of the two voltage regulation modules are respectively connected to two different ADC interfaces on the main control module. At this time, if the input of cable A is positive, that is, the electrode connected to cable A is the positive electrode, then the second voltage regulation module starts to work and outputs a 3.3V voltage, while the first voltage regulation module cannot work properly because the potential difference at the input terminal is about -0.6V, that is, there is no output voltage; on the contrary, if the input of cable A is negative, that is, the electrode connected to cable A is the negative electrode, then it is exactly the opposite. In this way, different input values can be measured at the two ADC interfaces of the main control module, and the polarity of the electrode connected to cable A can be detected. Of course, if there is no input to cable A (not connected to a certain battery circuit), then there is no output at the positive output terminals of the two voltage regulation modules, and it can be judged whether this cable has been connected, that is, a total of three possible situations can be judged, as shown in Table 2 below.

[0064] Table 2 Analysis of Polarity Detection Conditions

[0065] Output of the second voltage stabilizing module Output of the first voltage stabilizing module Detection conclusion 3.3 0 Positive electrode 0 3.3 Negative electrode 0 0 Not connected to the circuit 3.3 3.3 This situation does not exist

[0066] It should be further explained that when the input of cable A is positive, because the negative input terminal of the second voltage regulation module is connected to the second output terminal of the rectification module, its input terminal is the normal input voltage. For all normal voltage regulation modules on the market, as long as their output voltage is designed to be a certain value (or can be adjusted to this value, generally a value matching the ADC input voltage), their normal functions will be completed, that is, a set voltage (such as 3.3V) is regulated and output at the positive output terminal. However, the positive input terminal of the first voltage regulation module is connected to the first output terminal of the rectification module, and the voltage difference (less than 1V) between it and the cable A (in the case of positive input) connected to its negative input terminal is not sufficient to complete its normal voltage regulation function, so there is no output at its output terminal. In addition, although the voltage at its negative input terminal is slightly higher than that at the positive input terminal, the voltage difference is very small and can be ignored, so the first voltage regulation module will not be damaged either. This function has nothing to do with the specific circuit structure of the voltage regulation module. As long as it is a normal-function voltage regulation module on the market (regardless of whether it is an isolated type), the above-mentioned design function requirements can be achieved. Therefore, the sources of the voltage regulation modules used in the polarity detection module can be more extensive and the cost can be reduced.

[0067] The voltage stabilizing module needs to be isolated. Otherwise, if the voltage stabilizing module is non-isolated, that is, its negative input terminal and negative output terminal are directly connected, and the negative output terminals of two voltage stabilizing modules are simultaneously connected to the GND interface of the main control module, it will cause a current loop as shown by the gray line in Figure 5 . The current only passes through a rectifier diode, and the current is relatively large, resulting in a sparking phenomenon similar to a short circuit.

[0068] At this time, in this embodiment, the four polarity detection modules correspond to the four cables one by one. The input terminals of the polarity detection modules are respectively connected to the second ends, the total positive output terminal, and the total negative output terminal of the cables, and the output terminals of the polarity detection modules are connected to the main control module.

[0069] Among them, the polarity detection module includes a first voltage stabilizing module and a second voltage stabilizing module. The positive input terminal of the first voltage stabilizing module is connected to the total positive output terminal, the negative input terminal of the first voltage stabilizing module is connected to the second end of the cable, the positive output terminal of the first voltage stabilizing module is connected to the first ADC interface of the main control module, and the negative output terminal of the first voltage stabilizing module is connected to the GND interface of the main control module. The positive input terminal of the second voltage stabilizing module is connected to the second end of the cable, the negative input terminal of the second voltage stabilizing module is connected to the total negative output terminal, the positive output terminal of the second voltage stabilizing module is connected to the second ADC interface of the main control module, and the negative output terminal of the second voltage stabilizing module is connected to the GND interface of the main control module. The positive input terminal, the negative input terminal, the positive input terminal, and the negative input terminal of the first voltage stabilizing module and the second voltage stabilizing module form the input terminal of the polarity detection module, and the positive output terminal, the negative output terminal, the positive output terminal, and the negative output terminal of the first voltage stabilizing module and the second voltage stabilizing module form the output terminal of the polarity detection module.

[0070] Among them, both the first voltage stabilizing module and the second voltage stabilizing module can be isolated voltage stabilizing modules. The negative input terminal and the negative output terminal of the isolated voltage stabilizing module are isolated, that is, not connected.

[0071] The main control module is used to determine the polarity of the electrode connected to the cable based on the output voltage of the polarity detection module, and control the first target switch and the second target switch to close based on the polarities of the electrodes connected to the four cables, so that the positive pole of the rescue vehicle battery is connected to the positive pole of the vehicle to be rescued battery, and the negative pole of the rescue vehicle battery is connected to the negative pole of the vehicle to be rescued battery.

[0072] Among them, the main control module is used to determine that the polarity of the electrode connected by the cable is negative when the positive output terminal of the first voltage stabilization module outputs voltage and the positive output terminal of the second voltage stabilization module does not output voltage; determine that the polarity of the electrode connected by the cable is positive when the positive output terminal of the first voltage stabilization module does not output voltage and the positive output terminal of the second voltage stabilization module outputs voltage; and determine that the cable is not connected to the electrode that has been connected to the loop when the positive output terminal of the first voltage stabilization module does not output voltage and the positive output terminal of the second voltage stabilization module does not output voltage.

[0073] Among them, the main control module can be a single-chip microcomputer.

[0074] (4) Open circuit detection.

[0075] When the vehicle intelligent safety jump-starting device is just powered on and started, it is in the preparation mode. At this time, all switches are in the off state. The detection output values of 4 cables can be measured through the polarity detection module to determine whether they have been connected to a certain battery circuit and their positive and negative pole states. However, when the vehicle intelligent safety jump-starting device is in the jump-starting working mode, that is, when two of the switches connect the positive and negative poles of the rescue vehicle battery and the vehicle to be rescued battery respectively, it is impossible to detect whether a certain cable is in the open state through the above method. For example, after starting, one of the 4 clips is removed. If the No. 3 electrode in Figure 6 has been disconnected, Figure 6 K1 and K2 in are both switches. However, because the cable where the No. 3 electrode is located is still electrically connected to the No. 1 electrode, that is, the same pole of another battery, through the switch, it is impossible to detect whether it is open by detecting the positive and negative poles. At this time, if it accidentally contacts another polarity port (such as the No. 2 electrode or the No. 4 electrode) or the vehicle body metal part (generally the negative pole is grounded), it may cause a short circuit. Therefore, in addition to passive protection measures such as installing insulating coating materials at the clip and other positions, an active detection method is also required to be able to detect in real time that a certain cable is disconnected and disconnect all the switches connected to this cable to eliminate potential hazards and avoid danger to the greatest extent.

[0076] This embodiment attempts to measure the detection scheme of current. Since the power supply of the entire vehicle intelligent safety jump-starting device is provided by the battery, that is, the working power supply of the main control module comes from Figure 3For the circuit, for each of the four cables, before the first switch it is connected to, it can ensure that there is no current after removing the clip from the electrode. However, for the part behind the switch (such as the jump connection section), current may be generated because another battery connected to the switch powers a certain rectifier module. Therefore, the ammeter is set at the root of each cable, but outside the switch terminal. Specifically, the ammeter is installed at the second end of the cable, that is, before the connection point of the second end to any component (such as a switch, rectifier module). The Hall effect ammeter is used in this embodiment, that is, by measuring the magnetic field generated by the current in the cable, the current is calculated. Since the direction of the current is unknown, an ammeter capable of two-way measurement is required. Also, as mentioned in the previous analysis, the starting currents of different vehicles vary greatly, and the current difference between only charging and starting the vehicle is also relatively large. That is, an ammeter with a working current range of 0 - 500A needs to be adapted. Therefore, an ammeter with a large range is required.

[0077] At this time, the vehicle safety jump - starting device of this embodiment further includes: four ammeters, and the four ammeters are all connected to the main control module. The four ammeters correspond to the four cables one by one. The ammeter is installed at the second end of the cable and before the switch and rectifier module. The ammeter is used to detect whether there is current at the second end of the cable and obtain a detection signal. The main control module is used to control all switches connected to the cable to disconnect when the detection signal indicates that there is no current at the second end of the cable (that is, there is no current before the connection point of the second end of the cable to any component (such as a switch, rectifier module)).

[0078] Among them, the ammeter is an ammeter capable of two - way measurement and with a large range. A large range means that the range is greater than a preset value, and the preset value can be 0 - 500A.

[0079] (5) Overall circuit design.

[0080] Because the vehicle intelligent safety jump - starting device of this embodiment needs to be placed in the vehicle for a long time. If it is parked outdoors in summer and exposed to sunlight, the temperature inside the vehicle will be very high. To ensure safety, no power supply is set, but the battery of the rescue vehicle or the vehicle to be rescued is used for power supply. According to the previous discussion on the rectifier module and the polarity detection module, as well as the selection of the main control module and other components, the circuit diagram as shown in Figure 7 can be obtained. Figure 7Among them, the wide-input isolation voltage regulation module (group) is used to provide a stable working power supply for devices such as the main control, relay, and current sensor. The wide-input isolation voltage regulation module 1 is used to measure whether 1 is connected to the positive electrode, the wide-input isolation voltage regulation module 2 is used to measure whether 1 is connected to the negative electrode, the wide-input isolation voltage regulation module 3 is used to measure whether 2 is connected to the positive electrode, the wide-input isolation voltage regulation module 4 is used to measure whether 2 is connected to the negative electrode, the wide-input isolation voltage regulation module 5 is used to measure whether 3 is connected to the positive electrode, the wide-input isolation voltage regulation module 6 is used to measure whether 3 is connected to the negative electrode, the wide-input isolation voltage regulation module 7 is used to measure whether 4 is connected to the positive electrode, the wide-input isolation voltage regulation module 8 is used to measure whether 4 is connected to the negative electrode. The wide-input isolation voltage regulation modules 1-8 are all isolation voltage regulation modules. The upper limit of their input voltage can withstand the highest voltage of the vehicle battery, generally 12 or 24V, slightly higher when there is no load. Therefore, an isolation voltage regulation module with a higher voltage than the no-load voltage can be used. For example, an isolation voltage regulation module with an upper limit of 36V can be used. The lower limit of its input voltage only needs to meet the requirement that this isolation voltage regulation module can output a high-level signal that can be recognized by the main control. Specifically, it is determined by the isolation voltage regulation module, but it needs to be lower than the voltage of the faulty battery. Generally, as long as the lower limit is lower than 6V, it can cover the voltage range of most aging and declining batteries. The output voltage only needs to conform to the voltage that can be withstood and recognized by the input interfaces such as the main control ADC or GPIO, generally 3.3V or 5V, and can be determined according to the parameters of the main control module.

[0081] (6) Software control logic design.

[0082] After the hardware circuit is connected, it is necessary to sort out the control logic of the software according to the design requirements. It is mainly divided into three mode states. Mode 0 is when the power is just turned on (at least 2 cables are connected to the same battery circuit). The system performs various initializations, such as configuring each ADC interface, setting and enabling the serial port (used for communication with the relay board), configuring initial parameters for each filter, and disconnecting all relays on the relay board to prevent misoperation. Finally, it switches to Mode 1. After entering Mode 1, first perform corresponding operations according to the flag of whether re-initialization is required (required when returning from Mode 2 to Mode 1), then obtain the connection status of each cable, and according to the positive and negative connection status of each cable, jump to the corresponding relay and switch to Mode 2. After entering Mode 2, first perform corresponding operations according to the flag of whether re-initialization is required (required when entering Mode 2 from Mode 1), and delay for a corresponding time according to the delay requirement. Because in Mode 2, the current on the cable is measured by the ammeter, but even if the current on the cable is constant, the actual output of the ammeter is not a constant value, but a value that fluctuates around this actual value. Therefore, it is necessary to filter the output signal of the ammeter. Filtering requires collecting a certain amount of signals, which takes a little time. So, it is necessary to delay, and at the same time, continuously refresh the measured value of the ammeter. After it is stable (after the delay ends), judge whether disconnection is required (disconnection protection). The specific logic flowchart is asFigure 8 as shown

[0083] (7) Initial prototype physical object

[0084] Two 12V storage batteries are used to simulate the storage batteries of the rescue vehicle and the vehicle to be rescued. Through the positive and negative pole connection method similar to that Figure 9 as shown, the relay with the light on is the one that is pulled in, and the others are not. Multiple possible connection situations are tested. The specific combination situations are shown in Table 3 below

[0085] Table 3 Lapping polarity combination and relay pull-in test

[0086] Line 1# Line 2# Line 3# Line 4# Actually energized relay + - - + 1-4 and 2-3 + - + - 1-3 and 2-4 + + - - 1-2 and 3-4 - + + - 1-4 and 2-3 - + - + 1-3 and 2-4 - - + + 1-2 and 3-4

[0087] Only 6 situations need to be listed here because there are 4 electrodes in total for 2 storage batteries, and there are P4 = 24 combinations. However, in actual positive and negative pole connections, it is not necessary to distinguish whether it is the rescue vehicle or the vehicle to be rescued. Eventually, as long as the polarities are the same, they will be connected. Even if 2 cables are connected to the positive pole of the same storage battery and the other 2 cables are connected to the negative pole of the same storage battery, no short circuit will occur after connection. Therefore, there are (24 / 2) / 2 = 6 situations, thus achieving the design goal of intelligent and safe jump-starting

[0088] This embodiment provides a vehicle intelligent and safe jump-starting device and its design method. Aiming at the problem that traditional vehicle storage batteries decline and temporary safe jump-starting is needed, a safety jump-starting device based on relay jump connection technology and supporting software logic algorithm is proposed. Using basic components such as relays, rectification modules, voltage stabilization modules, and ammeters, a self-developed control logic algorithm is developed in the main control module. According to the detection data obtained by the self-developed low-cost positive and negative pole detection circuit, intelligent jump connection for jump-starting can be realized, which can achieve: without distinguishing the positive and negative poles of the connection wires and the storage battery, as long as 4 jump-starting wire clips are connected to the 4 electrodes on the storage battery (one clip is connected to one electrode), automatic identification and correct connection for jump-starting can be achieved within 20 ms. If even 1 clip is not correctly connected, no action will be taken to ensure connection safety; after jump-starting is completed, any 1 clip is removed, and the relay connection can be disconnected within 20 ms to ensure that this clip will not cause an accident due to touching other electrodes or the vehicle body metal. At the same time, this design and control logic algorithm can be extended to mutual power borrowing between different interface new energy vehicles with appropriate improvement, providing a possible technical option for temporary power supply in emergency situations

[0089] Embodiment 2

[0090] This embodiment provides a control method for a vehicle safety jump-starting device, which is applied to the vehicle safety jump-starting device described in Embodiment 1. As Figure 10 shown, the control method of the vehicle safety jump-starting device includes

[0091] S1: Obtain the output voltages of four polarity detection modules.

[0092] S2: Determine the polarities of the electrodes connected to the four cables based on the output voltages of the four polarity detection modules, and control the first target switch and the second target switch to close based on the polarities of the electrodes connected to the four cables, so that the positive electrode of the rescue vehicle battery is connected to the positive electrode of the vehicle to be rescued battery, and the negative electrode of the rescue vehicle battery is connected to the negative electrode of the vehicle to be rescued battery; the first target switch is a switch corresponding to the combination composed of the two cables whose connected electrodes have positive polarities, and the second target switch is a switch corresponding to the combination composed of the two cables whose connected electrodes have negative polarities.

[0093] Embodiment 3

[0094] In an exemplary embodiment, a computer device is provided. The computer device can be a server or a terminal, and its internal structure diagram can be as shown in Figure 11 The figure shows. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O), and a communication interface. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores a computer program. The internal memory provides an environment for the operation of the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with an external terminal through a serial port connection. When the computer program is executed by the processor, it implements a control method for a vehicle safety jump-start device.

[0095] Those skilled in the art can understand that Figure 11 The structure shown in is only a block diagram of some structures related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have a different component layout.

[0096] In an exemplary embodiment, a computer device is provided, including a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, it implements the control method of the vehicle safety jump-start device in Embodiment 2.

[0097] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use, and processing of relevant data need to comply with relevant regulations.

[0098] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0099] Specific examples are used in this article to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application; at the same time, for those of ordinary skill in the art, according to the idea of this application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to this application.

Claims

1. A vehicle safety jump-starting device, characterized in that, The vehicle safety jump-starting device includes: 4 cables, 6 switches, 6 rectification modules, 4 polarity detection modules, and a main control module; The 4 cables correspond to the 4 electrodes one by one, and the first ends of the cables are connected to the electrodes; the 4 electrodes are the positive and negative electrodes of the rescue vehicle battery and the positive and negative electrodes of the vehicle to be rescued battery; The 6 switches correspond to the 6 combinations obtained by randomly combining the 4 cables one by one. The first end of the switch is connected to the second end of the first cable in the combination, and the second end of the switch is connected to the second end of the second cable in the combination; the switch is used to connect the first cable and the second cable in the combination when in the closed state; The 6 rectification modules correspond to the 6 combinations obtained by randomly combining the 4 cables one by one. The first input end of the rectification module is connected to the second end of the first cable in the combination, and the second input end of the rectification module is connected to the second end of the second cable in the combination. The first output ends of the 6 rectification modules are connected to form a total positive output end, and the second output ends of the 6 rectification modules are connected to form a total negative output end. The total positive output end and the total negative output end are both connected to the main control module; the total positive output end and the total negative output end are used to output direct current to supply power to the main control module; The 4 polarity detection modules correspond to the 4 cables one by one. The input ends of the polarity detection modules are respectively connected to the second ends of the cables, the total positive output end, and the total negative output end, and the output ends of the polarity detection modules are connected to the main control module; The main control module is respectively connected to the control ends of the 6 switches; the main control module is used to determine the polarity of the electrode connected to the cable based on the output voltage of the polarity detection module, and control the first target switch and the second target switch to close based on the polarities of the electrodes connected by the 4 cables, so that the positive electrode of the rescue vehicle battery is connected to the positive electrode of the vehicle to be rescued battery, and the negative electrode of the rescue vehicle battery is connected to the negative electrode of the vehicle to be rescued battery; wherein, the polarity includes positive and negative; the first target switch is the switch corresponding to the combination composed of the two cables with the polarity of the connected electrode being positive, and the second target switch is the switch corresponding to the combination composed of the two cables with the polarity of the connected electrode being negative.

2. The vehicle safety jump-starting device according to claim 1, characterized in that, The switch is a normally open DC relay.

3. The vehicle safety jump-starting device according to claim 1, characterized in that, The rectification module is a full-bridge rectification circuit, and the full-bridge rectification circuit includes a first diode, a second diode, a third diode, and a fourth diode. The cathode of the first diode is connected to the anode of the second diode, the cathode of the second diode is connected to the cathode of the third diode, the anode of the third diode is connected to the cathode of the fourth diode, and the anode of the fourth diode is connected to the anode of the first diode; Among them, the connection end of the first diode and the second diode is the first input end of the rectification module, the connection end of the second diode and the third diode is the first output end of the rectification module, the connection end of the third diode and the fourth diode is the second input end of the rectification module, and the connection end of the fourth diode and the first diode is the second output end of the rectification module.

4. The vehicle safety jump-starting device according to claim 1, characterized in that, The polarity detection module includes a first voltage stabilization module and a second voltage stabilization module; The positive input terminal of the first voltage stabilizing module is connected to the total positive output terminal, the negative input terminal of the first voltage stabilizing module is connected to the second end of the cable, the positive output terminal of the first voltage stabilizing module is connected to the first ADC interface of the main control module, and the negative output terminal of the first voltage stabilizing module is connected to the GND interface of the main control module; The positive input terminal of the second voltage stabilizing module is connected to the second end of the cable, the negative input terminal of the second voltage stabilizing module is connected to the total negative output terminal, the positive output terminal of the second voltage stabilizing module is connected to the second ADC interface of the main control module, and the negative output terminal of the second voltage stabilizing module is connected to the GND interface of the main control module; Among them, both the first voltage stabilizing module and the second voltage stabilizing module are isolated voltage stabilizing modules, and the negative input terminal and the negative output terminal of the isolated voltage stabilizing module are isolated from each other; the positive input terminal of the first voltage stabilizing module, the negative input terminal of the first voltage stabilizing module, the positive input terminal of the second voltage stabilizing module, and the negative input terminal of the second voltage stabilizing module form the input terminal of the polarity detection module, and the positive output terminal of the first voltage stabilizing module, the negative output terminal of the first voltage stabilizing module, the positive output terminal of the second voltage stabilizing module, and the negative output terminal of the second voltage stabilizing module form the output terminal of the polarity detection module.

5. The vehicle safety jump-starting device according to claim 4, characterized in that, The main control module is used to determine that the polarity of the electrode connected by the cable is negative when the voltage is output at the positive output terminal of the first voltage stabilizing module and no voltage is output at the positive output terminal of the second voltage stabilizing module; to determine that the polarity of the electrode connected by the cable is positive when no voltage is output at the positive output terminal of the first voltage stabilizing module and the voltage is output at the positive output terminal of the second voltage stabilizing module; and to determine that the cable is not connected to the electrode already connected to the loop when no voltage is output at the positive output terminal of the first voltage stabilizing module and no voltage is output at the positive output terminal of the second voltage stabilizing module.

6. The vehicle safety jump-starting device according to claim 1, characterized in that, The vehicle safety jump-starting device further includes: four ammeters, and all four ammeters are connected to the main control module; The four ammeters correspond to the four cables one by one, and the ammeters are installed at the second end of the cables; the ammeters are used to detect whether there is current at the second end of the cables to obtain detection signals; The main control module is used to control all the switches connected to the cables to be disconnected when the detection signal indicates that there is no current at the second end of the cables.

7. The vehicle safety jump-starting device according to claim 6, wherein, The ammeter is an ammeter that can measure bidirectionally and has a large range, and the large range means that the range is greater than a preset value.

8. The vehicle safety jump-starting device according to claim 1, characterized in that, The main control module is a single-chip microcomputer.

9. A control method for a vehicle safety jump-starting device, applied to the vehicle safety jump-starting device according to any one of claims 1-8, characterized in that, The control method of the vehicle safety jump-starting device includes: Obtaining the output voltages of the four polarity detection modules; Determining the polarities of the electrodes connected by the four cables based on the output voltages of the four polarity detection modules, and controlling the first target switch and the second target switch to close based on the polarities of the electrodes connected by the four cables, so that the positive pole of the rescue vehicle battery is connected to the positive pole of the vehicle to be rescued battery, and the negative pole of the rescue vehicle battery is connected to the negative pole of the vehicle to be rescued battery; the first target switch is the switch corresponding to the combination formed by the two cables whose connected electrodes have a positive polarity, and the second target switch is the switch corresponding to the combination formed by the two cables whose connected electrodes have a negative polarity.

10. A computer device, comprising: A memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that the processor executes the computer program to implement the control method of the vehicle safety jump-starting device according to claim 9.

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