Portable standby starting device for vehicle

Abstract

The utility model relates to the technical field of automobiles, and discloses a vehicle portable standby starting device which comprises an internal power source, a switching circuit, a first voltage detection circuit, a first electrode clamp and a second electrode clamp, and the first electrode clamp and the second electrode clamp are used for being connected with the first end and the second end of a vehicle load. The internal power supply is provided with a first electrode and a second electrode, the first electrode is coupled to the first electrode clamp, the second electrode is coupled to the switching circuit, the switching circuit is coupled to the second electrode clamp, and the first voltage detection circuit is coupled to the switching circuit, the first electrode and the second electrode. And the detection circuit is used for detecting first voltage between the first electrode and the second electrode before the switching circuit is switched on, and the switching circuit is not switched on when the first voltage meets a first preset condition. The device can effectively solve the problems of safety and the like in the vehicle starting process in the prior art.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a portable standby starting device for a vehicle. Background Art

[0002] Cars often encounter problems that prevent them from starting during use. For example, when the car battery cannot start due to various reasons such as low temperature, aging, or long-term non-use, the vehicle can be started by a portable backup emergency starting device. However, in actual use, various abnormal conditions often occur, such as excessive output current and insufficient internal power supply voltage. If the starting device cannot cope with these conditions, it may cause certain damage to the vehicle circuit or the starting device itself. Utility Model Content

[0003] In view of this, an embodiment of the present application provides a portable backup starting device for a vehicle, which can effectively solve the safety and other problems in the vehicle starting process in the prior art.

[0004] In a first aspect, an embodiment of the present application provides a portable standby starting device for a vehicle, comprising: an internal power supply, a switch circuit, a first voltage detection circuit, a first electrode clamp and a second electrode clamp,

[0005] The first electrode clamp and the second electrode clamp are used to connect to the first end and the second end of the vehicle load,

[0006] The internal power source has a first electrode and a second electrode, the first electrode is coupled to the first electrode clamp, and the second electrode is coupled to the switch circuit.

[0007] The switch circuit is coupled to the second electrode clamp,

[0008] The first voltage detection circuit is coupled to the switch circuit, the first electrode and the second electrode, and is used to detect a first voltage between the first electrode and the second electrode before the switch circuit is turned on. The switch circuit is not turned on when the first voltage meets a first preset condition.

[0009] The embodiments of the present application have the following beneficial effects:

[0010] The portable standby starting device for a vehicle of an embodiment of the present application includes an internal power supply, a switch circuit, a first voltage detection circuit, a first electrode clamp and a second electrode clamp, wherein the first electrode clamp and the second electrode clamp are used to connect to the first end and the second end of the vehicle load, and the internal power supply has a first electrode and a second electrode, the first electrode is coupled to the first electrode clamp, the second electrode is coupled to the switch circuit, and the switch circuit is coupled to the second electrode clamp. The first voltage detection circuit is coupled to the switch circuit, the first electrode and the second electrode, and the first voltage detection circuit is used to detect a first voltage between the first electrode and the second electrode before the switch circuit is turned on, and the switch circuit is not turned on when the first voltage meets a first preset condition. The device can effectively solve the safety and other problems in the vehicle starting process in the prior art. For example, when the internal power supply voltage is insufficient, the control of the switch circuit is suspended to enter a state of protecting the internal power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 A first structural schematic diagram of a portable standby starting device for a vehicle according to an embodiment of the present application is shown;

[0013] Figure 2 A second structural schematic diagram of a portable standby starting device for a vehicle according to an embodiment of the present application is shown;

[0014] Figure 3 A first circuit diagram of a portable standby starting device for a vehicle according to an embodiment of the present application is shown;

[0015] Figure 4 A third structural schematic diagram of the portable standby starting device for a vehicle according to an embodiment of the present application is shown;

[0016] Figure 5 A second circuit diagram of a portable standby starting device for a vehicle according to an embodiment of the present application is shown;

[0017] Figure 6 A first schematic diagram of a first voltage detection circuit according to an embodiment of the present application is shown;

[0018] Figure 7 A fourth structural schematic diagram of a portable standby starting device for a vehicle according to an embodiment of the present application is shown;

[0019] Figure 8A second schematic diagram of the first voltage detection circuit according to an embodiment of the present application is shown;

[0020] Fig. 9 Another circuit schematic diagram of the switch circuit according to an embodiment of the present application is shown.

[0021] Description of main component symbols:

[0022] 10-vehicle portable standby starting device; BAT-internal power supply; CLIP-electrode clip; 100-switch circuit; 101-first voltage detection circuit; 102-second voltage detection circuit; 103-first indication circuit; 104-voltage stabilizing circuit; 105-first voltage maintaining circuit; 106-second voltage maintaining circuit; 107-first current detection circuit; 108-third voltage detection circuit; 109-first detection signal circuit; 110-second current detection circuit; 111-first resistance detection circuit; 112-second indication circuit; 113-second detection signal circuit; 114-temperature detection circuit. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0024] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0025] Hereinafter, the terms "including", "having" and their cognates that can be used in various embodiments of the present application are intended only to indicate specific features, numbers, steps, operations, elements, components or a combination of the foregoing items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components or a combination of the foregoing items or increasing the possibility of one or more features, numbers, steps, operations, elements, components or a combination of the foregoing items. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance.

[0026] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as those generally understood by those skilled in the art to which the various embodiments of the present application belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meanings as the contextual meanings in the relevant technical field and will not be interpreted as having idealized meanings or overly formal meanings unless clearly defined in the various embodiments of the present application.

[0027] Please refer to Figures 1 to 8 , some implementation methods of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0028] Figure 1 A structural schematic diagram of a portable standby starting device 10 for a vehicle according to an embodiment of the present application is shown.

[0029] Exemplarily, the portable standby starting device 10 for a vehicle includes: an internal power supply BAT, a switch circuit 100, a first voltage detection circuit 101, and an electrode clip CLIP, including a first electrode clip and a second electrode clip. Specifically, the first electrode clip and the second electrode clip are used to connect to the first end and the second end of the vehicle load. The internal power supply BAT has a first electrode and a second electrode. The first electrode is coupled to the first electrode clip, and the second electrode is coupled to the switch circuit 100. The switch circuit 100 is coupled to the second electrode clip. The first voltage detection circuit 101 is coupled to the switch circuit 100, the first electrode, and the second electrode. The first voltage detection circuit 101 is used to detect a first voltage between the first electrode and the second electrode before the switch circuit 100 is turned on. The switch circuit 100 is not turned on when the first voltage meets the first preset condition, and is turned on when the first voltage does not meet the first preset condition.

[0030] In the present application, the vehicle load mainly refers to the vehicle battery. It can be understood that the "first" and "second" in the present application are only used to distinguish two different electrode clips or electrodes for the convenience of description. Among them, the first electrode clip can be a negative polarity electrode clip CLIP-, or a positive polarity electrode clip CLIP+. The first electrode on the internal power supply BAT can be a negative electrode BAT- or a positive electrode BAT+. For example, when the first electrode clip is a negative polarity electrode clip CLIP- and the second electrode clip is a positive polarity electrode clip CLIP+, correspondingly, the first electrode coupled to the first electrode clip should be a negative electrode BAT-, and the second electrode coupled to the second electrode clip should be a positive electrode BAT+. Alternatively, when the first electrode clip is a positive polarity electrode clip CLIP+ and the second electrode clip is a negative polarity electrode clip CLIP-, correspondingly, the first electrode coupled to the first electrode clip is a positive electrode BAT+, and the second electrode coupled to the second electrode clip is a negative electrode BAT-.

[0031] Considering that if the voltage of the internal power supply BAT is too low and the vehicle is still powered, irreversible damage may be caused to the internal power supply BAT. For example, the active material on the electrode of the internal power supply BAT may be damaged and lose its responsiveness, thereby shortening the life of the internal power supply BAT. In this embodiment, the voltage state of the internal power supply BAT is detected by the first voltage detection circuit 101 to determine whether it meets the first preset condition, and when it meets the first preset condition, the switch circuit 100 is controlled not to be turned on, so that the internal power supply BAT does not power the vehicle.

[0032] Exemplarily, when it is detected that the value of the first voltage is less than or equal to the set low voltage threshold, the switch circuit 100 is turned off to enter the state of protecting the internal power supply BAT. It can be understood that the first preset condition is mainly related to the low voltage threshold of the internal power supply BAT. It is worth noting that for different types and quantities of battery positive electrode materials, the low voltage protection point of the corresponding single battery may be different, and thus the low voltage threshold of the entire internal power supply BAT may be different. For example, the low voltage threshold U in_L =U 1 ×N,U 1 It is the low voltage protection point of a single battery. In the present application, the setting of the first preset condition can be adjusted according to the type and quantity of the battery positive electrode material used, and is not specifically limited here.

[0033] For example, in the first case, if a ternary lithium battery or a lithium cobalt oxide battery is used, that is, N ternary lithium batteries or N lithium cobalt oxide batteries are connected in series between the first electrode and the second electrode to form the above-mentioned internal power supply BAT, wherein the voltage range of the ternary lithium battery or the lithium cobalt oxide battery is 3.0V to 3.7V, and the typical value is 3.2V. At this time, the first preset condition can be set to: the value of the first voltage is less than or equal to 3.2N, wherein N is the number of batteries connected in series in the internal power supply BAT. For example, if the internal power supply BAT is composed of 4 ternary lithium batteries connected in series, then the corresponding voltage threshold U in_L Then it is 3.2V*4=12.8V. That is to say, if it is detected that the value of the first voltage is less than or equal to 12.8V, the switch circuit 100 is controlled not to be turned on.

[0034] In the second case, if lithium iron phosphate batteries are used, that is, N lithium iron phosphate batteries are connected in series between the first electrode and the second electrode, where the voltage range of the lithium iron phosphate battery is 2.0V to 3.2V, and the typical value is 2.5V. At this time, the first preset condition may be: the value of the first voltage is less than or equal to 2.5N, where N is the number of batteries connected in series in the internal power supply BAT.

[0035] In the third case, if the internal power supply BAT uses a supercapacitor, that is, N supercapacitors are connected in series between the first electrode and the second electrode, where the voltage range of the supercapacitor is 1.8V to 2.5V, and the typical value is 2.0V. At this time, the first preset condition can be set to: the value of the first voltage is less than or equal to 2N, where N is the number of supercapacitors connected in series in the internal power supply BAT.

[0036] In one embodiment, Figure 2 As shown, the first voltage detection circuit 101 includes a sub-first voltage detection circuit 1011 and a microprocessor MCU, wherein the sub-first voltage detection circuit 1011 is coupled to the first electrode, the second electrode and the microprocessor MCU, the sub-first voltage detection circuit 1011 is used to detect the first voltage between the first electrode and the second electrode before the switch circuit 100 is turned on, the microprocessor MCU is coupled to the switch circuit 100, when the first voltage meets the first preset condition, the microprocessor MCU is used to control the switch circuit 100 not to be turned on, conversely, when the first voltage does not meet the first preset condition, the microprocessor MCU is used to control the switch circuit 100 to be turned on.

[0037] For example, Figure 3 As shown, the first voltage detection circuit 1011 includes resistors R2 and R6, wherein one end of the resistor R2 is used to connect the first electrode or the second electrode of the internal power supply BAT to collect the voltage signal VIN_VFB of the first voltage, and then the voltage signal VIN_VFB is used to connect to the first pin (not shown) of the microprocessor MCU. Figure 2 ), so that the microprocessor MCU reads the value U of the first voltage in , when the value of the first voltage U in Less than or equal to the low voltage threshold U in_L When the microprocessor MCU controls the switch circuit 100 to be non-conductive, the internal power supply BAT is protected.

[0038] Further optionally, in addition to being used to detect that the voltage of the internal power supply BAT is too low, the first voltage detection circuit 101 of the above embodiment can also be used to detect that the voltage of the internal power supply BAT is too high in some embodiments, thereby realizing protection against overvoltage of the internal power supply BAT.

[0039] Exemplarily, when the first voltage detection circuit 101 detects that the value of the first voltage of the internal power source BAT is greater than or equal to the set high voltage threshold, the control switch circuit 100 is turned off to enter a state of protecting the internal power source BAT. The high voltage threshold mainly depends on the type and quantity of the positive electrode material of the internal power source BAT. For example, the high voltage threshold U in_H=U2×N, U2 is the high voltage protection point of a single battery. For example, the high voltage protection point range of a ternary lithium battery is 4.2V~4.5V, with a typical value of 4.3V; the high voltage protection point range of a lithium iron phosphate battery is 3.65V~4.0V, with a typical value of 3.7V; the high voltage protection point range of a supercapacitor is 2.5V~3.6V, with a typical value of 3.0V; N is the number of batteries in series in the internal power supply BAT, etc. For example, when four ternary lithium batteries are connected in series, the high voltage threshold U in_H It is 4.3V×4=17.2V.

[0040] It can be understood that the first voltage detection circuit 101 is used to protect the internal power supply BAT and prevent the internal power supply BAT from being damaged.

[0041] In another embodiment, if Figure 5 As shown, the first voltage detection circuit 1011 includes a resistor R4, a resistor R30, a resistor R6 and a capacitor C2, wherein one end of the resistor R4 is used to connect the first electrode or the second electrode of the internal power supply BAT to collect the voltage signal of the first voltage (from Figure 5 The collected voltage signal is then input to the 13th pin of the microprocessor MCU, so that the microprocessor MCU reads the value U of the first voltage. in , when the value of the first voltage U in Less than or equal to the low voltage threshold U in_L When, or when the value of the first voltage U in Greater than or equal to the high voltage threshold U in_H When the microprocessor MCU controls the switch circuit 100 to be non-conductive, the internal power supply BAT is protected.

[0042] In addition, in order to achieve protection against the internal power supply BAT voltage being too low, in some other embodiments, the first voltage detection circuit 101 may adopt the following Figure 6 The circuit shown is composed of an op amp comparator IC3A, diodes D1, D6, D10, D23, D33, a capacitor C7, resistors R15, R27, R28, R13, R16, etc. Among them, the positive electrode of the diode D1 is connected to the positive electrode of the internal power supply BAT, and the negative electrode of the diode D10 is connected to the switch circuit 100. It can be understood that when the value of the first voltage U in Less than or equal to the low voltage threshold U in_L When the operational amplifier comparator IC3A pin 1 outputs a high level signal through the diode D10, the high level signal is used to control the switch circuit 100 not to conduct (or disconnect). Further optionally, the high level signal can also be used to drive the buzzer to sound and the light-emitting diode LED to light up, indicating that the device has entered the state of protecting the internal power supply BAT.

[0043] As another optional solution, in some other embodiments, the first voltage detection circuit 101 includes a sub-first voltage detection circuit 1011 and a microprocessor MCU, wherein the sub-first voltage detection circuit 1011 can be implemented as follows: Figure 6 The circuit shown. When the value of the first voltage U in Less than or equal to the low voltage threshold U in_L When the operational amplifier comparator IC3A pin 1 outputs a high level signal through the diode D10, the microprocessor MCU controls the switch circuit 100 to be non-conductive (or disconnected) based on the high level signal.

[0044] Of course, in some other embodiments, the first voltage detection circuit 101 can also protect the internal power supply BAT through a communication cable or other communication methods. For example, if the vehicle portable standby starting device 10 includes a host side including an internal power supply BAT and a wiring side including an electrode clip CLIP, and the host side and the wiring side are connected through a physical connector (such as an EC5 connector, etc.), Figure 7 As shown, the host side includes an internal power supply BAT, a first voltage detection circuit 101 and a first microprocessor MCU1, and the wiring side includes an electrode clip CLIP, a switch circuit and a second microprocessor MCU2, wherein the second microprocessor MCU2 and the first microprocessor MCU1 use a cable method, such as a serial port (COM) cable method, etc. Of course, other methods can also be used for communication, which is not limited here. Therefore, when the first microprocessor MCU1 detects that the first voltage meets the first preset condition through the first voltage detection circuit 101, it is transmitted to the second microprocessor MCU2 through the communication cable, so that the second microprocessor MCU2 controls the switch circuit 100 to be non-conductive. Optionally, the portable vehicle standby starting device 10 also includes a detection unit for temperature monitoring of the internal power supply BAT. When the battery temperature of the internal power supply BAT reaches a preset temperature range (such as 65°C to 90°C, with a typical value of greater than 80°C), the first microprocessor MCU1 can also use a communication cable or other communication method to transmit to the second microprocessor MCU2, so that the second microprocessor MCU2 controls the switch circuit 100 to be non-conductive (or disconnected), so as to enter a state of protecting the internal power supply BAT.

[0045] Similarly, combined Figure 6 In order to protect the internal power supply BAT from overvoltage, in some other embodiments, the first voltage detection circuit 101 further includes: Figure 8 The circuit shown in the figure is composed of an op amp comparator IC4A, a diode D30, resistors R53, R25, R19, R47, R46, etc., wherein one end of the resistor R19 is connected to the positive electrode of the internal power supply BAT, and the first pin of the op amp comparator IC4A is connected to Figure 6The cathode of the diode D23 in the circuit shown. in Greater than or equal to the high voltage threshold U in_H When the op amp comparator IC4A outputs a low level signal at the first pin to the cathode of the diode D23, the op amp comparator IC3A outputs a high level signal to control the switch circuit 100 to be non-conductive and enter the state of protecting the internal power supply BAT. Further optionally, the high level signal can also be used to drive the buzzer to sound and the light-emitting diode LED to light up, indicating that the device is currently in the overvoltage protection state.

[0046] In another possible embodiment, see Figure 1 The portable standby starting device 10 for a vehicle further includes a second voltage detection circuit 102, which is coupled to the switch circuit 100, the first electrode clamp and the second electrode clamp. The second voltage detection circuit 102 is used to detect the second voltage between the first end and the second end of the vehicle load before the switch circuit 100 is turned on. The switch circuit 100 is not turned on when the first voltage meets the first preset condition or the second voltage meets the second preset condition, and is turned on when the first voltage does not meet the first preset condition and the second voltage does not meet the second preset condition. It can be understood that the use of the second voltage detection circuit 102 to detect the voltage state on the vehicle load to control the switch circuit 100 to be turned on or off can further improve the working safety and system reliability of the device.

[0047] For example, the second preset condition may include, but is not limited to, that the second voltage is a reverse voltage, etc. It can be understood that the connection state between the first electrode clamp and the second electrode clamp and the first end and the second end of the vehicle load includes a first connection state and a second connection state, wherein the first electrode clamp has the same electrical polarity as the first end of the vehicle load, and the second electrode clamp has the same electrical polarity as the second end of the vehicle load, wherein the first connection state is that the first electrode clamp is connected to the first end and the second electrode clamp is connected to the second end; the second connection state is that the first electrode clamp is connected to the second end and the second electrode clamp is connected to the first end. When in the first connection state, the second voltage is a forward voltage, and when in the second connection state, the second voltage is a reverse voltage. If the voltage across the vehicle load is detected to be a reverse voltage, the control switch circuit 100 is not turned on. Further optionally, the absolute value of the reverse voltage is greater than or equal to 0.1V.

[0048] In other embodiments, the second preset condition may also be: the second voltage is a forward voltage, and the absolute value of the forward voltage is less than or equal to 9 V. It can be understood that when it is detected that the voltage difference across the vehicle load is a forward voltage, but the forward voltage value is too small, that is, the output voltage is lower than the normal 9V, in order to protect the vehicle load, the switch circuit 100 needs to be controlled not to conduct.

[0049] In one embodiment, Figure 3 As shown, the second voltage detection circuit 102 mainly includes an operational amplifier comparator U3, a resistor R17 and a resistor R19, and a diode D5, wherein the input end of the resistor R17 is used to connect the vehicle load. When it is detected that the input end voltage of the resistor R17 is lower than the reference voltage, the fourth foot of the operational amplifier comparator U3 outputs a high level signal, and the high level signal is used to control the switch circuit 100 to be non-conductive. Among them, the setting of the reference voltage should satisfy: the voltage of the reverse input end of the third foot of the operational amplifier comparator U3 is lower than the voltage of the same direction input end of the first foot of the operational amplifier comparator U3.

[0050] As an optional solution, the second voltage detection circuit 102 includes a sub-second voltage detection circuit 1021 and a microprocessor MCU (not shown in the figure), wherein the sub-second voltage detection circuit 1021 is coupled to the first electrode clamp, the second electrode clamp and the microprocessor MCU, and the sub-second voltage detection circuit 1021 is used to detect the second voltage between the first end and the second end before the switch circuit 100 is turned on; the microprocessor MCU is coupled to the switch circuit 100, and when the second voltage meets the second preset condition, the microprocessor MCU controls the switch circuit 100 to not be turned on. For example, Figure 3 Based on the second voltage detection circuit 102 for detecting the vehicle load voltage shown, the fourth pin of the operational amplifier comparator U3 can be further connected to the microprocessor MCU. When the microprocessor MCU receives the high level signal output by the fourth pin of the operational amplifier comparator U3, the switch circuit 100 is controlled to be non-conductive (or disconnected).

[0051] Further optionally, the portable standby starting device 10 for a vehicle further includes a first indication circuit 103, which is coupled to the second voltage detection circuit 102, and generates a sound and / or a light when the second voltage meets the second preset condition. It can be understood that the sound / light indication can allow the user to intuitively know the current working state of the device, so as to perform corresponding processing when a corresponding fault occurs, such as forced starting, disconnecting the connection between the electrode clip CLIP and the vehicle load, and other operations.

[0052] For example, Figure 3 As shown, the first indication circuit 103 includes a buzzer LS1, a resistor R22, a light emitting diode LED3, a resistor R24, a MOS tube Q6, and a resistor R26 (constituting a driving unit). The first indication circuit 103 is used to drive the buzzer LS1 to emit an alarm sound indication and the light emitting diode LED3 to emit a red light indication when the second voltage detection circuit 102 detects that the second voltage meets the second preset condition. Among them, the working voltage of the buzzer LS1 is 3V~24V, and the typical value can be 3.3V, 5V, and 12V.

[0053] In one embodiment, after the vehicle portable standby starting device 10 is connected to the vehicle load and the conditions for turning on the switch circuit 100 are met, the switch circuit 100 is first turned on to connect the internal power supply BAT to the vehicle load, and then waits for the user to perform an ignition operation. To avoid the internal power supply BAT being connected to the vehicle load for a long time, this embodiment will automatically disconnect the switch circuit 100 after a certain period of time, that is, disconnect the internal power supply BAT from the vehicle load.

[0054] Exemplarily, the vehicle portable standby starting device 10 further includes a first time control circuit, which is coupled to the switch circuit 100. The first time control circuit is used to start calculating the first time after the internal power source BAT is connected to the vehicle load, and the switch circuit 100 disconnects the internal power source BAT from the vehicle load when the first time satisfies the third preset condition. For example, the first time control circuit can be a microprocessor MCU, or can also be a timing module, etc.

[0055] Among them, the third preset condition can be set as: the above-mentioned first time is within the range of 10s-120s, such as 20s, 30s, 60s, 80s, etc., which is not limited here and can be set according to actual conditions.

[0056] In addition, in order to stabilize the voltage output by the internal power supply BAT and reduce fluctuations, in some other embodiments, such as Figure 1 , 2 As shown in FIG. 4 , the portable vehicle standby starting device 10 further includes a voltage stabilizing circuit 104, which is coupled to the internal power supply BAT and is used to supply power to the switch circuit 100 and the first voltage detection circuit 101. For example, the voltage provided by the voltage stabilizing circuit 104 is in the range of 2.0-6.0V, and can be specifically set to values ​​such as 2.7V, 3.3V, 5V, etc.

[0057] For example, Figure 3 As shown, the voltage stabilizing circuit 104 includes a voltage stabilizing chip U1, capacitors C1, C2, C3, and a resistor R1, and outputs a regulated voltage (such as 5V) to power the microprocessor MCU and various unit circuits in the device.

[0058] Further optionally, in order to increase the reliability of the voltage stabilizing circuit 104, the portable vehicle standby starting device 10 further includes a first voltage maintaining circuit 105, which is coupled to the internal power supply BAT and the voltage stabilizing circuit 104, and is used to prevent a sudden change in the input voltage of the voltage stabilizing circuit 104. For example, in one embodiment, the first voltage maintaining circuit 105 includes a capacitor and a diode, and the cathode of the diode is coupled to the anode of the capacitor. Figure 2As shown, when the internal power supply BAT voltage is pulled low during the vehicle startup process, the first voltage maintaining circuit 105 composed of the diode D1 and the capacitor C4 maintains the stability of the system power supply for a certain period of time, and the output voltage is usually in the range of 2.5V-13.0V, with a typical value of 5.0V.

[0059] In addition, considering that the voltage of the internal power supply BAT may be pulled down due to high current discharge during the vehicle startup process, for example, the voltage of the internal power supply BAT is 12V, and when the output current is 400A, the voltage will be instantly pulled down to about 7V. In winter, this voltage may even be pulled down to 1-2V at low temperatures. At this time, the voltage is too low, which will cause the system power supply voltage to be seriously insufficient and the switch circuit 100 cannot be reliably maintained on. Therefore, the reliability of the input voltage of the switch circuit 100 needs to be ensured through corresponding technologies. For example, the following solutions can be met, namely, method 1: design a voltage maintenance circuit that can maintain the voltage for a certain period of time; method 2: select (or design) an electronic switch that can remain stable at a very low voltage after being turned on; method 3: select an electronic switch that works at a lower voltage, and add a step-down circuit to power the electronic switch when necessary.

[0060] In some embodiments, see above Figure 1 , 2 Or 4, the portable vehicle standby starting device 10 further includes a second voltage maintaining circuit 106, which is coupled to the internal power supply BAT and the switch circuit 100, and is used to prevent the input voltage of the switch circuit 100 from changing suddenly. For example, in one embodiment, the second voltage maintaining circuit 106 includes a capacitor and a diode, and the cathode of the diode is coupled to the anode of the capacitor. Figure 2 As shown, the second voltage maintaining circuit 106 is composed of a diode D6 and a capacitor C12, and maintains the conduction of the switch circuit 100 for a certain period of time (typical value is greater than 10ms), wherein the length of time is determined by the capacity of the capacitor C12.

[0061] When the vehicle load is connected and the switch circuit 100 is turned on normally, considering that the internal power supply BAT may have abnormal conditions such as excessive current after being turned on, for safety reasons, the vehicle portable standby starting device 10 of the present application will also monitor the output current of the internal power supply BAT in real time so as to disconnect it in time when an abnormality occurs.

[0062] In some other embodiments, see above Figure 1, exemplary, the vehicle portable standby starting device 10 also includes a first current detection circuit 107, the switch circuit 100 is coupled to the first current detection circuit 107, the first current detection circuit 107 is coupled to the first electrode or the second electrode, the first current detection circuit 107 is used to detect a first current flowing through the first current detection circuit 107 after the switch circuit 100 is turned on, the switch circuit 100 is coupled to the first current detection circuit 107, and when the first current meets a fourth preset condition, the internal power supply BAT is disconnected from the vehicle load.

[0063] Among them, the fourth preset condition can be set as: the first current is greater than or equal to 1000A, for example, it can be specifically set to 1100A, 1200A, 1300A, etc.

[0064] In one embodiment, Figure 2 As shown, the first current detection circuit 107 includes a sub-first current detection circuit 1071 and a microprocessor MCU. The sub-first current detection circuit 1071 is coupled to the first electrode or the second electrode, and is used to detect the first current flowing through the first current detection circuit 107 after the switch circuit 100 is turned on. The microprocessor MCU is coupled to the switch circuit 100 and the sub-first current detection circuit 1071, and when the first current meets the fourth preset condition, the switch circuit 100 is controlled to disconnect.

[0065] For example, the sub-first current detection circuit 1071 can use devices such as current sensing resistors to collect current signals, and then transmit the collected current signals to the microprocessor MCU through differential wiring, so that the microprocessor MCU reads and calculates the magnitude of the first current, and controls the switch circuit 100 to disconnect when the current is greater than or equal to the set current threshold. It can be understood that when performing current detection, in addition to using current sensing resistors, devices such as Hall current sensors, current transformers, wires, etc. that can collect current can also be used, which is not limited here.

[0066] Alternatively, in some other embodiments, the first current detection circuit 107 includes a first current acquisition circuit 1072 and a first circuit 1073, wherein the first current acquisition circuit 1072 is coupled to the first electrode or the second electrode for acquiring the first current, and the first circuit 1073 is coupled to the first current acquisition circuit 1072 and the switch circuit 100 for determining whether the first current satisfies the fourth preset condition. The first current acquisition circuit 1072 may be composed of components such as a current sensing resistor, a Hall current sensor, a current transformer, and a wire. The first circuit 1073 may be a microprocessor MCU with an analog-to-digital (i.e., ADC) function, or may be composed of discrete ADC modules and comparators and other components, which are not specifically limited here, as long as the first current can be acquired and compared with the set current value to obtain a control signal for controlling the switch circuit 100.

[0067] For example, Figure 3 As shown, the first current acquisition circuit 1072 includes a detection resistor R25, and the first circuit 1073 includes a transistor Q5, resistors R23, R21 and a microprocessor MCU, wherein when the first current exceeds the threshold value I1, the transistor Q5 is turned on, and a level signal is output to the 10th pin of the microprocessor MCU, and the microprocessor MCU will quickly output a shutdown signal to the switch circuit 100 to immediately disconnect the output. Generally, this response time (recorded as T1) should be short to ensure a fast response. Among them, the threshold value I1 is usually greater than 800A, the typical value is 1000A, and the typical value of T1 is less than 100ms.

[0068] Considering the situation that the device may need to be manually forced to start, in some other embodiments, exemplarily, the portable standby starting device 10 for a vehicle further includes a forced starting switch K2, the second voltage detection circuit 102 includes a sub-second voltage detection circuit 1021 and a microprocessor MCU, the sub-second voltage detection circuit 1021 is coupled to the first electrode clamp, the second electrode clamp and the microprocessor MCU, and is used to detect the second voltage between the first end and the second end before the switch circuit 100 is turned on, and the microprocessor MCU is coupled to the switch circuit 100, the first voltage detection circuit 101 and the forced starting switch K2. When the switch circuit 100 is not turned on when the first voltage does not meet the first preset condition, the second voltage is a forward voltage, and the resistance value of the equivalent resistance RL corresponding to the externally connected vehicle load calculated by the voltage value output by the third voltage detection circuit 108 is within a normal range (such as greater than or equal to 1Ω), after the forced starting switch K2 is manually pressed, the microprocessor MCU directly controls the switch circuit 100 to turn on, or controls the switch circuit 100 to turn on when it is detected that the voltage between the first end and the second end of the vehicle load has a certain voltage drop value. It can be understood that only when the first voltage does not meet the first preset condition, the second voltage is a forward voltage, and the resistance value of the equivalent resistance RL corresponding to the vehicle load is within the normal range, can the microprocessor MCU control the switch circuit 100 to be turned on based on the operation of the forced start switch K2.

[0069] Exemplarily, the forced start switch K2 can be implemented by a button, and can be specifically connected to one of the pins of the microprocessor MCU. For example, when the voltage between the first end and the second end of the vehicle load drops from UC1 to UC2 ​​to generate a voltage drop value UCD (UCD=UC1-UC2), and the voltage drop value UCD is greater than or equal to the voltage drop threshold UC3 (usually in the range of 0.5V to 2V, and a typical value of 1V), it indicates that the voltage drop is caused by the ignition of the vehicle. To ensure the normal start of the vehicle, the microprocessor MCU needs to output a control signal within time T0 to turn on the switch circuit 100, so that the internal power supply BAT supplies power to the vehicle. Among them, the typical value of time T0 is less than 100ms. It can be understood that if the voltage drop value UCD is less than UC3, the switch circuit 100 is not turned on, which can prevent interference and cause misoperation.

[0070] In some other embodiments, the vehicle portable standby starting device 10 further includes a third voltage detection circuit 108, which is coupled to the switch circuit 100, the first electrode clamp and the second electrode clamp, and is used to detect a third voltage and / or voltage drop between the first end and the second end before the switch circuit 100 is turned on. The switch circuit 100 is not turned on when the first voltage meets the first preset condition, or the third voltage meets the fifth preset condition, or the voltage drop meets the sixth preset condition. The third voltage between the first end and the second end of the vehicle load can be collected by, for example, a resistor voltage divider, a voltage sensor, etc.

[0071] Among them, when the third voltage is detected, the fifth preset condition can be set to that the third voltage is a forward voltage and the third voltage is less than or equal to 9V, indicating that the vehicle load voltage is insufficient. Alternatively, when the voltage drop is detected, the sixth preset condition can be set to that the voltage drop is less than 1V. It can be understood that when any of the three situations occurs, namely, the first voltage satisfies the first preset condition, the third voltage satisfies the fifth preset condition, and the voltage drop between the first end and the second end satisfies the sixth preset condition, the switch circuit 100 needs to be controlled to be non-conductive.

[0072] In one embodiment, Figure 2As shown, the third voltage detection circuit 108 includes a first detection signal circuit 109, a sub-third voltage detection circuit 1081 and a microprocessor MCU, the first detection signal circuit 109 is coupled to the first electrode clamp or the second electrode clamp, and is used to provide a first signal to the first end and the second end before the switch circuit 100 is turned on, the sub-third voltage detection circuit 1081 is coupled to the first electrode clamp and the second electrode clamp, and is used to detect the third voltage and / or voltage drop between the first end and the second end according to the first signal before the switch circuit 100 is turned on, and the microprocessor MCU is coupled to the switch circuit 100 and the sub-third voltage detection circuit 1081, and when the first voltage meets the first preset condition, or the third voltage meets the fifth preset condition, or the voltage drop meets the sixth preset condition, the switch circuit 100 is controlled not to be turned on. Among them, the first signal can be used to assist in determining whether the first electrode clamp and the second electrode clamp have been normally connected to the vehicle load.

[0073] For example, Figure 3As shown, the third voltage detection circuit 108 includes a first detection signal circuit 109 composed of a transistor Q4, a MOS tube Q1, resistors R12, R11, R3, and a diode D3, a sub-third voltage detection circuit 1081 composed of resistors R4 and R8, and a microprocessor MCU. The specific detection process is as follows: first, the 11th pin of the microprocessor MCU outputs a low level to the first resistor detection circuit 111, so that the MOS tube Q1 in the first detection signal circuit 109 is turned off. At this time, the 2nd pin of the microprocessor MCU reads the voltage value of the sub-third voltage detection circuit 1081 to calculate the voltage value UC1 of the vehicle load. When the voltage value UC1 is within a reasonable range (the typical range is 1V to 15V), the microprocessor MCU determines that the electrode clip CLIP has been normally connected to the vehicle load, and then judges the size of the voltage value UC1 again. If the voltage value UC1 is greater than the threshold value UC2 (UC2 ranges from 8 to 11V, and the typical value is 9V), at this time, the microprocessor MCU controls the switch circuit 100 to turn on when it is detected that the voltage between the first end and the second end of the vehicle load has a certain voltage drop value; if the voltage value UC1 is less than or equal to the threshold value UC2, it indicates that the vehicle load is in a low voltage state. In this state, the user needs to manually press the forced start switch K2 to make the vehicle portable standby starting device 10 enter the forced start mode. Further, when the voltage value UC1 is zero (if no voltage value is read, it means that the vehicle load does not exist or is not connected to the vehicle load), the 11th pin of the microprocessor MCU will output a high level to the first detection signal circuit 109, and the MOS tube Q1 in the first detection signal circuit 109 is turned on, and a voltage value is output to the sub-third voltage detection circuit 1081. Then the 2nd pin of the microprocessor MCU reads the voltage value output by the sub-third voltage detection circuit 1081, and calculates the equivalent resistance RL corresponding to the externally connected vehicle load according to this voltage value. If the resistance value of the equivalent resistance RL is very low (such as close to 0Ω, the typical value RL is less than 1Ω), the 12th pin of the microprocessor MCU controls the switch circuit 100 to be non-conductive. On the contrary, if the resistance value of the equivalent resistance RL is within the normal range (such as greater than or equal to 1Ω), it is judged that the first electrode clamp and the second electrode clamp are normally connected to the vehicle load, and the 12th pin of the microprocessor MCU outputs a high level to control the switch circuit 100 to be turned on.

[0074] Of course, in some other embodiments, the first detection signal circuit 109 can be separated from the third voltage detection circuit 108 and exist in the portable vehicle standby starting device 10, so as to control the switch circuit 100 to be turned on or off based on the second voltage and the first signal. Exemplarily, the portable vehicle standby starting device 10 also includes a first detection signal circuit 109, which is coupled to the switch circuit 100, the first electrode clamp and the second electrode clamp, and is used to provide a first signal to the first end and the second end before the switch circuit 100 is turned on. When the first voltage does not meet the first preset condition and the second voltage does not meet the second preset condition, the switch circuit 100 selectively connects the internal power supply BAT to the vehicle load based on the second voltage and the first signal.

[0075] For example, when the microprocessor MCU outputs a low-level first signal, when the second voltage is within a reasonable range (typical range of 1V to 15V), the switch circuit 100 is controlled to be turned on to connect the internal power supply BAT to the vehicle load; when the second voltage is less than the set voltage threshold or is zero, the switch circuit 100 is not turned on first. After that, after the first signal of high level is output, the equivalent resistance of the vehicle load can be detected according to the second voltage read again, and then it can be determined whether the first electrode clamp and the second electrode clamp are normally connected to the vehicle load, so as to control whether the switch circuit 100 needs to be turned on.

[0076] In one embodiment, Figure 4 As shown, the first detection signal circuit 109 includes a sub-first detection signal circuit 1091 and a microprocessor MCU. The sub-first detection signal circuit 1091 is coupled to the first electrode clamp and the second electrode clamp, and is used to provide a first signal to the first end and the second end before the switch circuit 100 is turned on. The microprocessor MCU is coupled to the switch circuit 100 and the sub-first detection signal circuit 1091. When the first voltage does not meet the first preset condition and the second voltage does not meet the second preset condition, the switch circuit 100 is controlled to be turned on or off based on the second voltage and the first signal. For example, the sub-first detection signal circuit 1091 includes the following: Figure 3 The transistor Q4, MOS tube Q1, resistors R12, R11, R3, diode D3, etc. are shown.

[0077] In some other embodiments, the vehicle portable standby starting device 10 further includes a second time control circuit, the third voltage detection circuit 108 is used to detect the third voltage and voltage drop between the first end and the second end before the switch circuit 100 is turned on, the second time control circuit is coupled to the switch circuit 100, and the second time control circuit is used to start calculating the second time after the first voltage does not meet the first preset condition, the third voltage does not meet the fifth preset condition, and the voltage drop does not meet the sixth preset condition, and the switch circuit 100 meets the seventh preset condition and turns on at the second time. For example, the second time control circuit can be a microprocessor MCU, or can also be a timing module, etc.

[0078] Among them, the seventh preset condition can be set to that the second time is less than or equal to 100ms. It can be understood that when it is determined that the internal power supply BAT voltage, the third voltage or voltage drop between the first terminal and the second terminal of the vehicle load meet the conduction condition, the switch circuit 100 is controlled to be turned on in time within the time range of 100ms.

[0079] As an alternative, different from the above embodiment, the calculation start time of the second time is different. In some other embodiments, the portable vehicle standby starting device 10 further includes a second time control circuit, which is coupled to the switch circuit 100. The second time control circuit is used to start calculating the second time after the first voltage does not meet the first preset condition, and the switch circuit 100 is turned on when the second time meets the seventh preset condition. It can be understood that in this embodiment, the second time control circuit starts timing as long as it is determined that the internal power supply BAT does not have a voltage shortage, and then controls the switch circuit 100 to be turned on in time within a certain time.

[0080] Considering that the output current of the portable vehicle standby starting device 10 may be too large after the switch circuit 100 is turned on, in order to protect the internal power supply BAT in time when the current is too large, the device also sets a current detection circuit to detect the current output by the internal power supply BAT.

[0081] In some other embodiments, the vehicle portable standby starting device 10 also includes a second current detection circuit 110, which is coupled to the first electrode or the second electrode and is used to detect a second current flowing through the second current detection circuit 110 after the switch circuit 100 is turned on. The switch circuit 100 is coupled to the second current detection circuit 110, and when the second current satisfies an eighth preset condition and the second current duration satisfies a ninth preset condition, the internal power supply BAT is disconnected from the vehicle load.

[0082] The eighth preset condition may be set as: the second current is greater than or equal to 300 A. The ninth preset condition may be set as: the second current duration is greater than 10 ms.

[0083] In one embodiment, the second current detection circuit 110 includes a sub-second current detection circuit 1101 and a microprocessor MCU. The sub-second current detection circuit 1101 is coupled to the first electrode or the second electrode, and is used to detect the second current flowing through the second current detection circuit 110 after the switch circuit 100 is turned on. The microprocessor MCU is coupled to the switch circuit 100 and the sub-second current detection circuit 1101, and controls the switch circuit 100 to disconnect when the second current meets the eighth preset condition and the second current duration meets the ninth preset condition.

[0084] For example, Figure 3 As shown, the sub-second current detection circuit 1101 includes resistors R18 and R20, wherein the 5th pin of the microprocessor MCU is connected to the series node between the resistors R18 and R20, and optionally, the 5th pin of the microprocessor MCU is also grounded through a capacitor C10. The working process is: the 5th pin of the microprocessor MCU reads the voltage signal output by the resistor R20 and further calculates the size of the corresponding second current, and then when it is detected that the second current reaches the preset current threshold I2, the microprocessor MCU starts timing, and after T3 time, the 12th pin of the microprocessor MCU outputs a shutdown signal to the switch circuit 100 to turn off the output. For example, the time T3 is usually 1s-120s, the typical value is 5s, and the current threshold I2 is usually 50A-200A, and the typical value is 100A.

[0085] In another embodiment, the second current detection circuit 110 includes a second current acquisition circuit 1102 and a second circuit 1103 (neither of which is shown in the figure), the second current acquisition circuit 1102 is coupled to the first electrode or the second electrode, and is used to collect the second current, and the second circuit 1103 is coupled to the second current acquisition circuit 1102 and the switching circuit 100, and is used to determine whether the second current satisfies a fourth preset condition.

[0086] The second current collection circuit 1102 may be implemented as follows: Figure 3 The structure of the second current detection circuit 1101 shown in FIG. 1 includes resistors R18 and R20. The second circuit 1103 may be configured as follows: Figure 3 The first circuit 1073 shown includes a transistor Q5, resistors R23, R21 and a microprocessor MCU. Specifically, the 10th pin of the microprocessor MCU is connected to the transistor Q5 in the second circuit. When it is detected that the second current reaches the current threshold I3 and is maintained for a certain time T2, the 12th pin of the microprocessor MCU outputs a shutdown signal to the switch circuit 100 to turn off the output. The current threshold I3 is usually 400A-1000A, with a typical value of 500A, and the time T2 is usually 10ms-1s, with a typical value of 300ms. It can be understood that the response time allowed by the second current can be longer than the response time allowed by the first current.

[0087] It is worth noting that, for the first circuit 1073 in the first current detection circuit 107 and the second circuit 1103 in the second current detection circuit 110, since they have the same structure, in actual application, it is preferred to implement the first current detection and the second current detection of the internal power supply BAT through time-sharing multiplexing of the circuits (i.e. sharing the same circuit).

[0088] Further optionally, due to certain errors in components, the present embodiment will also calibrate the first current detection circuit 107 and / or the second current detection circuit 110 in the device. It can be understood that by first disconnecting the loop where the first current detection circuit 107 and / or the second current detection circuit 110 is located and measuring the voltage as the zero point, and then obtaining the voltage value when the loop is connected, the calibrated voltage value is obtained by performing difference processing to improve the current measurement accuracy.

[0089] As Figure 3 Taking the first current detection circuit 107 shown as an example, the microprocessor MCU calibrates the connected first current detection circuit 107 through the 5th pin each time it is powered on. The method is: when powered on, the 11th and 12th pins of the microprocessor MCU are both in a closed state, so that the first current detection loop is in an open state, and then the 5th pin of the microprocessor MCU reads the current voltage value UI0 across the current detection resistor R25, and uses the voltage value UI0 as the zero point. After that, when the switch circuit 100 is turned on to form a loop, the current flows through the current detection resistor R25 to generate a voltage value UI1. By subtracting the zero point value UI0, that is, according to (UI1-UI0) divided by the resistance value of the current detection resistor R25, the actual current value Io can be calculated.

[0090] In some other embodiments, the portable standby starting device 10 for a vehicle further includes a first resistance detection circuit 111, which is coupled to the switch circuit 100, the first electrode clamp and the second electrode clamp, and is used to detect the resistance value of the vehicle load before the switch circuit 100 is turned on. The switch circuit 100 is not turned on when the first voltage satisfies the first preset condition or the resistance value satisfies the tenth preset condition. The tenth preset condition is that the above-mentioned resistance value is less than 1Ω.

[0091] In one embodiment, Figure 2As shown, the first resistance detection circuit 111 includes a sub-first resistance detection circuit 1111 and a microprocessor MCU. The sub-first resistance detection circuit 1111 is coupled to the first electrode clamp and the second electrode clamp, and is used to detect the resistance value of the vehicle load before the switch circuit 100 is turned on. The microprocessor MCU is coupled to the switch circuit 100 and the sub-first resistance detection circuit 1111. When the first voltage meets the first preset condition or the resistance value meets the tenth preset condition, the switch circuit 100 is controlled not to be turned on. It can be understood that the microprocessor MCU here is mainly used to obtain the resistance value of the vehicle load and perform conditional judgment to control the switch circuit 100. Of course, this role of the microprocessor MCU can also be achieved by discrete devices, and this is only an achievable example.

[0092] For example, the first resistance detection circuit 111 can be implemented by using the same structure as the third voltage detection circuit 108, wherein the first resistance detection circuit 111 includes: Figure 3 The transistor Q4, MOS tube Q1, resistors R12, R11, R3, diode D3, resistor R4, resistor R8 and microprocessor MCU shown in the figure, in actual application, if the device already includes the third voltage detection circuit 108, then the third voltage detection circuit 108 can be reused to detect the resistance value of the vehicle load without the need to additionally set up the first resistance detection circuit 111, so as to simplify the circuit and reduce the cost.

[0093] In some other embodiments, the vehicle portable standby starting device 10 also includes a second indication circuit 112, the first resistance detection circuit 111 includes a sub-first resistance detection circuit 1111 and a microprocessor MCU, the sub-first resistance detection circuit 1111 is coupled to the first electrode clamp and the second electrode clamp, and is used to detect the resistance value of the vehicle load before the switch circuit 100 is turned on, the microprocessor MCU is coupled to the switch circuit 100, the sub-first resistance detection circuit 1111 and the second indication circuit 112, and the second indication circuit 112 makes a sound and / or generates light when the resistance value meets the tenth preset condition.

[0094] like Figure 3 As shown, the second indication circuit 112 includes a light emitting diode LED1 and a resistor R15. It can be seen that the microprocessor MCU obtains the resistance value of the equivalent resistor RL corresponding to the vehicle load. If the resistance value of the equivalent resistor RL is very low (close to 0Ω, and a typical value is less than 1Ω), the 15th pin of the microprocessor MCU outputs a high level, so that the light emitting diode LED1 of the second indication circuit 112 sends a green indication signal. Of course, it can be understood that the light emitting diode in the second indication circuit 112 is not limited to LED1, and further, it can also include other light emitting diodes, such as Figure 3As shown, the 16th pin of the microprocessor MCU is externally connected to a red light-emitting diode LED2. It should be understood that the green light-emitting diode LED1 connected to the 15th pin is used to indicate the status when the connection is correct; and the red light-emitting diode LED2 connected to the 16th pin can be used to indicate the status when the connection is incorrect. In addition, the color of the light-emitting diodes in this application is not limited to a single color. For example, some can be green, and some can be yellow, purple, etc. In actual processes, users can use light-emitting diodes of different colors to indicate different states according to actual needs, which is not limited here.

[0095] As an optional solution, the vehicle portable standby starting device 10 also includes a second detection signal circuit 113 (not shown in the figure), which is coupled to the switch circuit 100, the first electrode clamp and the second electrode clamp, and is used to provide a second signal to the first end and the second end before the switch circuit 100 is turned on. When the first voltage does not meet the first preset condition, the switch circuit 100 selectively connects the internal power supply BAT to the vehicle load based on the first voltage and the second signal.

[0096] In one embodiment, Figure 4 As shown, the second detection signal circuit 113 includes a sub-second detection signal circuit 1131 and a microprocessor MCU. The sub-second detection signal circuit 1131 is coupled to the first electrode clamp and the second electrode clamp, and is used to provide a second signal to the first end and the second end before the switch circuit 100 is turned on. The microprocessor MCU is coupled to the switch circuit 100 and the sub-second detection signal circuit 1131. When the first voltage does not meet the first preset condition, the switch circuit 100 is controlled to be turned on or off based on the first voltage and the second signal.

[0097] like Figure 5 As shown, the second detection signal circuit 113 includes a sub-second detection signal circuit 1131 composed of resistors R22, R26, R2, R27 and MOS tube Q10 and a microprocessor MCU, wherein the output signal of the sixth pin of the microprocessor MCU controls the conduction and disconnection of the MOS tube Q10, and then the MOS tube Q10 generates different voltage values ​​in different states, thereby providing a second signal. For example, when Q10 is turned off, it is used to generate a first voltage value UH, and when Q10 is turned on, it generates a second voltage value UL. Then, the microprocessor MCU determines whether to turn on the switch circuit 100 according to the first voltage value UH and the second voltage value UL. It can be understood that the above-mentioned second signal includes two different states of the conduction and disconnection of the MOS tube Q10.

[0098] In some other embodiments, when the second detection signal circuit 113 is included, Figure 4As shown, the vehicle portable standby starting device 10 further includes a common detection circuit 120, including: a first detection circuit 121, a second detection circuit 122 and a third detection circuit 123, which is used to specifically determine whether the switch circuit 100 is turned on by detecting voltages of different levels.

[0099] For example, Figure 5 As shown, the first detection circuit 121 includes resistors R12, R15, R5, R7, R17, a voltage-stabilizing diode ZD3, and a capacitor C5, which are used for detecting higher voltages. The second detection circuit 122 includes resistors R16, R8, a capacitor C3, and a voltage-stabilizing diode ZD1, which are used for detecting normal (such as 12V) voltages. The third detection circuit 123 includes resistors R3, R9, a voltage-stabilizing diode ZD2, and a capacitor C4, which are used for detecting low voltages, such as detecting voltages when the current reaches 1000A. Among them, the voltage-stabilizing diodes ZD1, ZD2, and ZD3 are all used for voltage limiting clamping to prevent excessive voltage from damaging the microprocessor MCU.

[0100] Specifically, the 6th pin of the microprocessor MCU outputs a low level, the MOS tube Q10 of the first detection circuit is turned on, and the 9th, 10th, and 11th pins of the microprocessor MCU read the values ​​U1L, U2L, and U3L of the first to third detection circuits respectively, so as to obtain the voltage value UL. UL value: if U1L is not over the range, UL = U1L, when U1L is over the range, read U2L, if U2L is not over the range, UL = U2L, when U2L is over the range, read U3L, UL = U3L; the 6th pin of the microprocessor MCU outputs a high level, the MOS tube Q10 is turned on, and the 9th, 10th, and 11th pins of the microprocessor MCU read the values ​​U1H, U2H, and U3H of the three detection circuits respectively, so as to obtain the voltage value UH; (the method of taking the value of UH is the same as UL). When UH is approximately equal to the voltage of the internal power supply BAT, and UL is approximately equal to 0V, it is judged to be no-load; when UH is approximately equal to the voltage of the internal power supply BAT, and UL is approximately equal to UH, it is judged that the resistance value of the vehicle load before the switch circuit 100 is turned on is less than 1Ω; when UH is greater than the voltage of the internal power supply BAT, and UL is greater than the voltage of the internal power supply BAT, it is judged that the first electrode clamp and the second electrode clamp are in a second connection state with the first end and the second end of the vehicle load.

[0101] In the present application, there are many solutions for implementing the switch circuit 100 in the portable vehicle standby starting device 10 .

[0102] For example, in a first embodiment, the switch circuit 100 includes a first drive switch, a second drive switch and a first switch K1, the first drive switch is coupled to the first voltage detection circuit 101 and the first switch K1, the second drive switch is coupled to the second voltage detection circuit 102 and the first switch K1, the first switch K1 is coupled to the second electrode clamp, the first drive switch controls the first switch K1 to be non-conductive when the first voltage satisfies the first preset condition, the second drive switch controls the first switch K1 to be non-conductive when the second voltage satisfies the second preset condition, and the first switch K1 is non-conductive when the first voltage satisfies the first preset condition or the second voltage satisfies the second preset condition. Exemplarily, the first switch K1 can be one of a relay, a MOS tube, etc., and needs to be able to withstand a current of 50A to 1000A within 5 seconds.

[0103] like Fig. 9 As shown, the switch circuit 100 includes a MOS transistor Q7 as a first drive switch, a MOS transistor Q2 as a second drive switch, and a first switch K1. In addition, it also includes some required peripheral devices, such as resistors R5, R9, R10, diode D2, etc. One end of the first switch K1 is connected to the electrode clip CLIP, and the other end is used to connect the internal power supply BAT; the MOS transistor Q2 is coupled to the first switch K1, wherein the control end of the MOS transistor Q7 and the input end of the resistor R9 are respectively used to access the corresponding control signal. For example, when it is detected that the voltage of the internal power supply BAT is low, the first voltage detection circuit 101 can generate a control signal to the MOS transistor Q7 to control the first switch K1 to be non-conductive. Alternatively, when it is detected that the voltage at both ends of the vehicle load is a reverse voltage or a forward voltage but the magnitude of the forward voltage does not meet the forward conduction requirement, the second voltage detection circuit 102 can generate a control signal to the MOS transistor Q2 to control the first switch K1 to be non-conductive. It can be understood that when the first voltage detection circuit 101 or the second voltage detection circuit 102 adopts a solution including a microprocessor, the corresponding control signal can be sent by the microprocessor MCU to the corresponding MOS transistor Q7 or MOS transistor Q2.

[0104] Optionally, in a second embodiment, the switching circuit 100 includes a first drive switch, a second drive switch, a third drive switch and a first switch K1, the third drive switch is coupled to the second voltage detection circuit 102 and the second drive switch, the second drive switch is coupled to the first switch K1, the first drive switch is coupled to the first voltage detection circuit 101 and the first switch K1, the first switch K1 is coupled to the second electrode clamp, the third drive switch controls the second drive switch to be non-conductive when the second voltage satisfies the second preset condition, the first drive switch is non-conductive when the first voltage satisfies the first preset condition, and the first switch K1 is non-conductive when the first voltage satisfies the first preset condition or the second voltage satisfies the second preset condition.

[0105] exist Fig. 9 On the basis of, the switch circuit 100 further includes a transistor Q3 and a transistor Q8 as a third driving switch, and required resistors R13, R27, R14, and R28, such as Figure 3 As shown, when the second voltage detection circuit 102 detects that the output voltage on the second electrode clamp is lower than the reference voltage, it will output a high level, thereby controlling the first switch K1 to be non-conductive through the third driving switch.

[0106] Optionally, in a third embodiment, the switch circuit 100 includes a first drive switch and a first switch K1, the first drive switch is coupled to the first voltage detection circuit 101 and the first switch K1, the first switch K1 is coupled to the second electrode clamp, and the first drive switch controls the first switch K1 to be non-conductive when the first voltage satisfies the first preset condition. It can be understood that in this embodiment, the control signal of the first drive switch can be derived from the first voltage detection circuit 101, and can also be derived from one or more combinations of the above-mentioned second voltage detection circuit 102, the third voltage detection circuit 108, the first time control circuit, the first current detection circuit 107, the second current detection circuit 110, the first detection signal circuit 109, the second detection signal circuit 113, etc., depending on the actual circuit design of the device, which is not limited here.

[0107] like Figure 5 As shown, the switch circuit 100 includes a MOS transistor Q6 as a first drive switch, and peripheral devices such as resistors R1, R31 and a diode D3. When the MOS transistor Q6 receives different control signals, it controls the first switch K1 to be turned on or off. For example, when the first voltage detection circuit 101 detects that the internal power supply BAT has a low voltage, the first switch K1 is controlled to be turned off by the MOS transistor Q6. Among them, the MOS transistor Q6 here can also be implemented by a triode, etc., which is not limited here.

[0108] In some other embodiments, exemplarily, the vehicle portable standby starting device 10 further includes a temperature detection circuit 114, which is coupled to the switch circuit 100 and is used to detect the temperature of the switch circuit 100. The switch circuit 100 is not turned on when the first voltage meets the first preset condition or the temperature meets the eleventh preset condition. For example, the temperature detection circuit 114 includes a temperature sensor, the switch circuit 100 includes a first switch K1, and the temperature sensor is arranged near the first switch K1. Among them, the eleventh preset condition is that the temperature is greater than or equal to 70°C, the temperature value TMP1 is usually 60°C to 120°C, and the typical value is 90°C.

[0109] In another embodiment, if Figure 2Or 4, the temperature detection circuit 114 includes a sub-temperature detection circuit 1141 and a microprocessor MCU, the sub-temperature detection circuit 1141 is used to detect the temperature of the switch circuit 100, the microprocessor MCU is coupled to the switch circuit 100 and the sub-temperature detection circuit 1141, and when the first voltage meets the first preset condition or the temperature meets the eleventh preset condition, the switch circuit 100 is controlled to be non-conductive.

[0110] For example, Figure 3 As shown, the resistor R7 and the thermistor NTC1 form a sub-temperature detection circuit 1141. The thermistor NTC1 is placed near the first switch K1. When the temperature is too high, the resistance of the thermistor NTC1 becomes smaller. The third pin of the microprocessor MCU calculates the temperature value through this voltage value, and when the temperature rises to the temperature threshold TMP1, the over-temperature protection action is triggered, that is, the 12th pin of the microprocessor MCU outputs a closing signal or does not output an opening signal to control the switch circuit 100 to be disconnected or not conducting.

[0111] In the above-mentioned embodiments, various circuits may include a microprocessor MCU. In actual applications, a microprocessor MCU and the like may appear.

[0112] The vehicle portable standby starting device 10 of the present application can effectively control the start and stop operations of the device when an abnormality occurs in the circuit by performing various functions such as voltage value detection, current value detection, vehicle load resistance detection, etc. on the internal power supply BAT side, thereby greatly increasing the safety of the present application.

[0113] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and structure diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in an alternative implementation, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the structure diagram and / or the flow diagram, and the combination of boxes in the structure diagram and / or the flow diagram, can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0114] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A portable standby starting device for a vehicle, characterized in that: include: internal power supply, switch circuit, first voltage detection circuit, first electrode clamp and second electrode clamp, The first electrode clamp and the second electrode clamp are used to connect to the first end and the second end of the vehicle load, The internal power source has a first electrode and a second electrode, the first electrode is coupled to the first electrode clamp, and the second electrode is coupled to the switch circuit. The switch circuit is coupled to the second electrode clamp, The first voltage detection circuit is coupled to the switch circuit, the first electrode and the second electrode, and is used to detect a first voltage between the first electrode and the second electrode before the switch circuit is turned on. The switch circuit is not turned on when the first voltage meets a first preset condition.

2. The portable backup starting device for a vehicle according to claim 1, characterized in that: N ternary lithium batteries or N lithium cobalt oxide batteries are connected in series between the first electrode and the second electrode, and the first preset condition is that the value of the first voltage is less than or equal to 3.2N.

3. The portable backup starting device for a vehicle according to claim 1, characterized in that: N lithium iron phosphate batteries are connected in series between the first electrode and the second electrode, and the first preset condition is that the value of the first voltage is less than or equal to 2.5N.

4. The portable backup starting device for a vehicle according to claim 1, characterized in that: N supercapacitors are connected in series between the first electrode and the second electrode, and the first preset condition is that the value of the first voltage is less than or equal to 2N.

5. The portable backup starting device for a vehicle according to claim 1, characterized in that: The first voltage detection circuit includes a sub-first voltage detection circuit and a microprocessor, The sub-first voltage detection circuit is coupled to the first electrode, the second electrode and the microprocessor, and is used to detect the first voltage between the first electrode and the second electrode before the switch circuit is turned on. The microprocessor is coupled to the switch circuit, and controls the switch circuit to be non-conductive when the first voltage meets the first preset condition.

6. The portable backup starting device for a vehicle according to claim 1, characterized in that: It also includes a second voltage detection circuit, which is coupled to the switch circuit, the first electrode clamp and the second electrode clamp, and is used to detect a second voltage between the first end and the second end before the switch circuit is turned on. The switch circuit is not turned on when the first voltage meets the first preset condition or the second voltage meets the second preset condition.

7. The portable backup starting device for a vehicle according to claim 6, characterized in that: The second preset condition is that the second voltage is a reverse voltage.

8. The portable standby starting device for a vehicle according to claim 7, characterized in that: The absolute value of the reverse voltage is greater than or equal to 0.1V.

9. The portable backup starting device for a vehicle according to claim 6, characterized in that: The second preset condition is that the second voltage is a forward voltage, and the absolute value of the forward voltage is less than or equal to 9V.

10. The portable backup starting device for a vehicle according to claim 6, characterized in that: The second voltage detection circuit comprises a sub-second voltage detection circuit and a microprocessor, The sub-second voltage detection circuit is coupled to the first electrode clamp, the second electrode clamp and the microprocessor, and is used to detect the second voltage between the first end and the second end before the switch circuit is turned on. The microprocessor is coupled to the switch circuit, and controls the switch circuit to be non-conductive when the first voltage satisfies a first preset condition or the second voltage satisfies the second preset condition.

11. The portable backup starting device for a vehicle according to claim 6, characterized in that: The switch circuit includes a first drive switch, a second drive switch and a first switch, wherein the first drive switch is coupled to the first voltage detection circuit and the first switch, the second drive switch is coupled to the second voltage detection circuit and the first switch, and the first switch is coupled to the second electrode clamp. The first drive switch controls the first switch to be non-conductive when the first voltage satisfies the first preset condition, and the second drive switch controls the first switch to be non-conductive when the second voltage satisfies the second preset condition. The first switch is non-conductive when the first voltage satisfies the first preset condition or the second voltage satisfies the second preset condition.

12. The portable backup starting device for a vehicle according to claim 6, characterized in that: The switch circuit further includes a first drive switch, a second drive switch, a third drive switch and a first switch, wherein the third drive switch is coupled to the second voltage detection circuit and the second drive switch, the second drive switch is coupled to the first switch, the first drive switch is coupled to the first voltage detection circuit and the first switch, and the first switch is coupled to the second electrode clamp. The third drive switch controls the second drive switch to be non-conductive when the second voltage satisfies the second preset condition, the first drive switch to be non-conductive when the first voltage satisfies the first preset condition, and the first switch to be non-conductive when the first voltage satisfies the first preset condition or the second voltage satisfies the second preset condition.

13. The portable backup starting device for a vehicle according to claim 1, characterized in that: The switch circuit includes a first drive switch and a first switch, wherein the first drive switch is coupled to the first voltage detection circuit and the first switch, and the first switch is coupled to the second electrode clamp. The first driving switch controls the first switch to be non-conductive when the first voltage meets the first preset condition.

14. The portable backup starting device for a vehicle according to claim 1, characterized in that: It also includes a first time control circuit, wherein the first time control circuit is coupled to the switch circuit, The first time control circuit is used to start calculating a first time after the internal power supply is connected to the vehicle load, and the switch circuit disconnects the internal power supply from the vehicle load when the first time satisfies a third preset condition.

15. The portable backup starting device for a vehicle according to claim 14, characterized in that: The third preset condition is that the first time is in the range of 10s-120s.

16. The portable backup starting device for a vehicle according to claim 14, characterized in that: The first time control circuit is a microprocessor.

17. The portable standby starting device for a vehicle according to claim 1, characterized in that: The first current detection circuit is coupled to the first electrode or the second electrode, and is used to detect a first current flowing through the first current detection circuit after the switch circuit is turned on. The switch circuit is coupled to the first current detection circuit, and disconnects the internal power supply from the vehicle load when the first current meets a fourth preset condition.

18. The portable standby starting device for a vehicle according to claim 17, characterized in that: The fourth preset condition is that the first current is greater than or equal to 1000A.

19. The portable backup starting device for a vehicle according to claim 17, characterized in that: The first current detection circuit comprises a sub-first current detection circuit and a microprocessor, The sub-first current detection circuit is coupled to the first electrode or the second electrode, and is used to detect a first current flowing through the first current detection circuit after the switch circuit is turned on. The microprocessor is coupled to the switch circuit and the sub-first current detection circuit, and controls the switch circuit to be disconnected when the first current meets the fourth preset condition.

20. The portable backup starting device for a vehicle according to claim 1, characterized in that: It also includes a voltage stabilizing circuit, which is coupled to the internal power supply and is used to supply power to the switch circuit and the first voltage detection circuit.

21. The portable backup starting device for a vehicle according to claim 20, characterized in that: The voltage provided by the voltage stabilizing circuit is in the range of 2.0V-6.0V.

22. The portable backup starting device for a vehicle according to claim 20, characterized in that: It also includes a first voltage maintaining circuit, which is coupled to the internal power supply and the voltage stabilizing circuit and is used to prevent a sudden change in the input voltage of the voltage stabilizing circuit.

23. The portable backup starting device for a vehicle according to claim 22, characterized in that: The first voltage maintaining circuit includes a capacitor and a diode, wherein the cathode of the diode is coupled to the anode of the capacitor.

24. The portable standby starting device for a vehicle according to claim 1, characterized in that: It also includes a third voltage detection circuit, which is coupled to the switch circuit, the first electrode clamp and the second electrode clamp, and is used to detect a third voltage and / or voltage drop between the first end and the second end before the switch circuit is turned on. The switch circuit does not turn on when the first voltage meets the first preset condition, or the third voltage meets the fifth preset condition, or the voltage drop meets the sixth preset condition.

25. The portable backup starting device for a vehicle according to claim 24, characterized in that: The fifth preset condition is that the third voltage is a forward voltage and the third voltage is less than or equal to 9V.

26. The portable backup starting device for a vehicle according to claim 24, characterized in that: The sixth preset condition is that the voltage drop is less than 1V.

27. The portable backup starting device for a vehicle according to claim 24, characterized in that: The third voltage detection circuit includes a sub-third voltage detection circuit and a microprocessor, The sub-third voltage detection circuit is coupled to the first electrode clamp and the second electrode clamp, and is used to detect a third voltage and / or a voltage drop between the first end and the second end before the switch circuit is turned on. The microprocessor is coupled to the switch circuit and the sub-third voltage detection circuit, and controls the switch circuit to be non-conductive when the first voltage satisfies the first preset condition, or the third voltage satisfies the fifth preset condition, or the voltage drop satisfies the sixth preset condition.

28. The portable standby starting device for a vehicle according to claim 24, characterized in that: It also includes a second time control circuit, wherein the third voltage detection circuit is used to detect a third voltage and a voltage drop between the first end and the second end before the switch circuit is turned on. The second time control circuit is coupled to the switch circuit, and is used to start calculating the second time after the first voltage does not meet the first preset condition, the third voltage does not meet the fifth preset condition, and the voltage drop does not meet the sixth preset condition. The switch circuit is turned on when the second time meets the seventh preset condition.

29. The portable backup starting device for a vehicle according to claim 28, characterized in that: The seventh preset condition is that the second time is less than or equal to 100 ms.

30. The portable standby starting device for a vehicle according to claim 28, characterized in that: The second time control circuit is a microprocessor.

31. The portable standby starting device for a vehicle according to claim 1, characterized in that: It also includes a second time control circuit, which is coupled to the switch circuit. The second time control circuit is used to start calculating the second time after the first voltage does not meet the first preset condition, and the switch circuit is turned on when the second time meets the seventh preset condition.

32. The portable standby starting device for a vehicle according to claim 1, characterized in that: It also includes a second voltage maintaining circuit, which is coupled to the internal power supply and the switch circuit and is used to prevent a sudden change in the input voltage of the switch circuit.

33. The portable standby starting device for a vehicle according to claim 32, characterized in that: The second voltage maintaining circuit includes a resistor, a capacitor, and a diode, wherein the cathode of the diode is coupled to the anode of the capacitor.

34. The portable standby starting device for a vehicle according to claim 1, characterized in that: The device further comprises a second current detection circuit, the second current detection circuit being coupled to the first electrode or the second electrode and configured to detect a second current flowing through the second current detection circuit after the switch circuit is turned on. The switch circuit is coupled to the second current detection circuit, and disconnects the internal power supply from the vehicle load when the second current satisfies an eighth preset condition and a duration of the second current satisfies a ninth preset condition.

35. The portable backup starting device for a vehicle according to claim 34, characterized in that: The eighth preset condition is that the second current is greater than or equal to 300A, and the ninth preset condition is that the duration of the second current is greater than 10ms.

36. The portable standby starting device for a vehicle according to claim 34, characterized in that: The second current detection circuit includes a sub-second current detection circuit and a microprocessor, wherein the sub-second current detection circuit is coupled to the first electrode or the second electrode and is used to detect a second current flowing through the second current detection circuit after the switch circuit is turned on. The microprocessor is coupled to the switch circuit and the sub-second current detection circuit, and controls the switch circuit to be disconnected when the second current satisfies an eighth preset condition and the second current duration satisfies a ninth preset condition.

37. The portable standby starting device for a vehicle according to claim 1, characterized in that: It also includes a first resistance detection circuit, which is coupled to the switch circuit, the first electrode clamp and the second electrode clamp, and is used to detect the resistance value of the vehicle load before the switch circuit is turned on. The switch circuit is not turned on when the first voltage meets the first preset condition or the resistance value meets the tenth preset condition.

38. The portable standby starting device for a vehicle according to claim 37, characterized in that: The tenth preset condition is that the resistance value is less than 1Ω.

39. The portable standby starting device for a vehicle according to claim 37, characterized in that: The first resistance detection circuit includes a sub-first resistance detection circuit and a microprocessor. The sub-first resistance detection circuit is coupled to the first electrode clamp and the second electrode clamp and is used to detect the resistance value of the vehicle load before the switch circuit is turned on. The microprocessor is coupled to the switch circuit and the sub-first resistance detection circuit, and controls the switch circuit to be non-conductive when the first voltage satisfies a first preset condition or the resistance value satisfies a tenth preset condition.

40. The portable backup starting device for a vehicle according to claim 6, characterized in that: The device further comprises a first detection signal circuit, which is coupled to the switch circuit, the first electrode clamp and the second electrode clamp and is used to provide a first signal to the first end and the second end before the switch circuit is turned on. The switch circuit selectively connects the internal power source to the vehicle load based on the second voltage and the first signal when the first voltage does not satisfy the first preset condition and the second voltage does not satisfy the second preset condition.

41. The portable standby starting device for a vehicle according to claim 40, characterized in that: The first detection signal circuit includes a sub-first detection signal circuit and a microprocessor, The sub-first detection signal circuit is coupled to the first electrode clamp and the second electrode clamp, and is used to provide a first signal to the first end and the second end before the switch circuit is turned on. The microprocessor is coupled to the switch circuit and the sub-first detection signal circuit, and controls the switch circuit to be turned on or off based on the second voltage and the first signal when the first voltage does not satisfy the first preset condition and the second voltage does not satisfy the second preset condition.

42. The portable standby starting device for a vehicle according to claim 1, characterized in that: The device further comprises a second detection signal circuit, which is coupled to the switch circuit, the first electrode clamp and the second electrode clamp and is used to provide a second signal to the first end and the second end before the switch circuit is turned on. The switch circuit selectively connects the internal power source to the vehicle load based on the first voltage and the second signal when the first voltage does not satisfy the first preset condition.

43. The portable standby starting device for a vehicle according to claim 42, characterized in that: The second detection signal circuit includes a sub-second detection signal circuit and a microprocessor, wherein the sub-second detection signal circuit is coupled to the first electrode clamp and the second electrode clamp, and is used to provide a second signal to the first end and the second end before the switch circuit is turned on. The microprocessor is coupled to the switch circuit and the sub-second detection signal circuit, and controls the switch circuit to be conductive or non-conductive based on the first voltage and the second signal when the first voltage does not meet the first preset condition.

44. The portable standby starting device for a vehicle according to claim 1, characterized in that: It also includes a temperature detection circuit, which is coupled to the switch circuit and is used to detect the temperature of the switch circuit. The switch circuit is not turned on when the first voltage meets the first preset condition or the temperature meets the eleventh preset condition.

45. The portable standby starting device for a vehicle according to claim 44, characterized in that: The eleventh preset condition is that the temperature is greater than or equal to 70°C.

46. ​​The portable standby starting device for a vehicle according to claim 44, characterized in that: The temperature detection circuit includes a sub-temperature detection circuit and a microprocessor. The sub-temperature detection circuit is used to detect the temperature of the switch circuit. The microprocessor is coupled to the switch circuit and the sub-temperature detection circuit. When the first voltage meets the first preset condition or the temperature meets the eleventh preset condition, the switch circuit is controlled to be non-conductive.

47. The portable standby starting device for a vehicle according to claim 44, characterized in that: The temperature detection circuit includes a temperature sensor, the switch circuit includes a first switch, and the temperature sensor is arranged near the first switch.

48. The portable standby starting device for a vehicle according to any one of claims 11 to 13, characterized in that: The first switch is one of a relay and a MOS tube.

49. The portable standby starting device for a vehicle according to claim 6, characterized in that: The device further comprises a forced start switch, wherein the second voltage detection circuit comprises a sub-second voltage detection circuit and a microprocessor, wherein the sub-second voltage detection circuit is coupled to the first electrode clamp, the second electrode clamp and the microprocessor, and is used to detect the second voltage between the first end and the second end before the switch circuit is turned on. The microprocessor is coupled to the switch circuit, the first voltage detection circuit and the forced start switch. The switch circuit is not turned on when the first voltage meets the first preset condition or the second voltage meets the second preset condition. When the forced start switch is pressed, the microprocessor controls the switch circuit to be turned on when the second voltage meets the second preset condition.

50. The portable standby starting device for a vehicle according to claim 6, characterized in that: It also includes a first indication circuit, which is coupled to the second voltage detection circuit. When the second voltage meets a second preset condition, a sound and / or a light is generated.

51. The portable standby starting device for a vehicle according to claim 37, characterized in that: It also includes a second indicating circuit, wherein the first resistance detection circuit includes a sub-first resistance detection circuit and a microprocessor, The sub-first resistance detection circuit is coupled to the first electrode clamp and the second electrode clamp, and is used to detect the resistance value of the vehicle load before the switch circuit is turned on. The microprocessor is coupled to the switch circuit, the sub-first resistance detection circuit and the second indication circuit. The second indication circuit emits a sound and / or generates a light when the resistance value meets a tenth preset condition.

52. The portable standby starting device for a vehicle according to claim 17, characterized in that: The first current detection circuit includes a first current acquisition circuit and a first circuit. The first current acquisition circuit is coupled to the first electrode or the second electrode and is used to acquire the first current. The first circuit is coupled to the first current acquisition circuit and the switching circuit and is used to determine whether the first current meets a fourth preset condition.

53. The portable standby starting device for a vehicle according to claim 34, characterized in that: The second current detection circuit includes a second current acquisition circuit and a second circuit. The second current acquisition circuit is coupled to the first electrode or the second electrode and is used to acquire the second current. The second circuit is coupled to the second current acquisition circuit and the switching circuit and is used to determine whether the second current meets a fourth preset condition.

54. The portable standby starting device for a vehicle according to claim 42, characterized in that: It also includes a common detection circuit, which is used to specifically determine whether the switch circuit is turned on by detecting voltages of different levels.

55. The portable standby starting device for a vehicle according to claim 54, characterized in that: The common detection circuit includes a first detection circuit, a second detection circuit and a third detection circuit.

Images