Anti-reverse-connection and anti-short-circuit vehicle-mounted emergency starting power supply and control method

Abstract

The embodiment of the invention discloses an anti-reverse-connection and anti-short-circuit vehicle-mounted emergency starting power supply and a control method, the anti-reverse-connection and anti-short-circuit vehicle-mounted emergency starting power supply comprises a power supply unit, a control unit, a positive electrode clamp, a negative electrode clamp, a voltage detection unit and a control unit, the positive electrode of the power supply unit is connected with the positive electrode clamp, and the negative electrode of the power supply unit is connected with the negative electrode clamp; the voltage detection unit is connected with the negative electrode clamp and the control unit. The voltage detection unit is arranged to directly detect the voltage of the negative electrode clamp, and the connection state of the vehicle-mounted emergency starting power supply is judged based on the voltage value, so that the intelligent identification of the connection state of the vehicle-mounted emergency starting power supply is realized. As the voltage of the negative electrode clamp is obviously different in the states of suspension, positive connection, reverse connection and short connection, the design can cover all abnormal working conditions only by single-point voltage sampling, and the output voltage of the vehicle-mounted emergency starting power supply is controlled only in the positive connection state, so that the safety is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle emergency jump starter technology, and in particular to a vehicle emergency jump starter and control method that is protected against reverse connection and short circuit. Background Technology

[0002] As a widely used vehicle auxiliary device, the core function of an on-board emergency jump starter is to provide temporary power support to a car battery that cannot start the engine due to insufficient power, thereby helping the vehicle to start in an emergency. In practical applications, this device needs to be correctly connected to the positive and negative terminals of the car battery via a dedicated connecting cable to form a complete power supply circuit.

[0003] However, when performing connection operations, users often encounter difficulties in ensuring accurate initial connections due to complex operating environments (such as cramped engine compartments or insufficient lighting), unclear signage, or insufficient operator experience. A particularly critical and prevalent operational risk lies in incorrect connection polarity, specifically the possibility of mistakenly connecting the positive output of the emergency jump starter to the negative terminal of the car battery, while simultaneously connecting its negative output to the positive terminal—a situation commonly referred to as "reverse connection."

[0004] Reverse polarity connection will lead to extremely serious consequences. The high energy release generated at the moment of reverse connection, accompanied by intense heat and even electric sparks, poses a direct threat to the personal safety of the operator and may cause burns or fires.

[0005] Therefore, ensuring the safety of emergency jump starters during the connection process is crucial. How to automatically detect and determine the connection status in real-time, quickly, and reliably during the connection process with a car battery, especially accurately identifying dangerous reverse polarity connections, has become a core technical bottleneck that urgently needs to be addressed in this field. Developing an efficient and robust reverse polarity detection mechanism, and taking timely protective measures accordingly (such as actively cutting off the output), is an essential technical requirement for improving the intrinsic safety level of the equipment, ensuring safe operation for users, and enhancing product reliability. Summary of the Invention

[0006] The technical problem to be solved by the embodiments of the present invention is how to accurately detect the connection status of the vehicle emergency starter power supply.

[0007] To address the aforementioned problems, in a first aspect, embodiments of the present invention propose a vehicle-mounted emergency jump starter with reverse connection and short-circuit protection, comprising a power supply unit, a control unit, a positive clamp, a negative clamp, a voltage detection unit, and a control unit. The positive terminal of the power supply unit is connected to the positive clamp, and the negative terminal of the power supply unit is connected to the negative clamp. The voltage detection unit is connected to both the negative clamp and the control unit. The voltage detection unit detects the voltage of the negative clamp, and the connection status of the vehicle-mounted emergency jump starter is determined based on the voltage of the negative clamp.

[0008] A further technical solution is that the vehicle-mounted emergency jump starter also includes a first voltage divider unit and a second voltage divider unit. The positive clamp is connected to the negative clamp through the first voltage divider unit, and the negative clamp is grounded through the second voltage divider unit.

[0009] A further technical solution is that the voltage detection unit includes a high-voltage detection unit and a first switching unit. The high-voltage detection unit is connected to the negative electrode clip and the first switching unit, and the first switching unit is connected to the control unit.

[0010] A further technical solution is that the voltage detection unit includes a low-voltage detection unit and a second switching unit. The low-voltage detection unit is connected to the negative electrode clip and the second switching unit, and the second switching unit is connected to the control unit.

[0011] A further technical solution is that the vehicle-mounted emergency jump starter also includes an alarm unit, which is connected to the control unit.

[0012] A further technical solution is that the vehicle-mounted emergency jump starter also includes a power supply start switch unit, which is connected to the negative terminal of the power supply unit, the control unit, and the negative terminal clip.

[0013] Secondly, embodiments of the present invention provide a control method for the above-mentioned reverse connection and short circuit protection vehicle emergency starting power supply, the method comprising:

[0014] Collect the voltage of the negative terminal clamp;

[0015] Determine whether the voltage of the negative clamp is greater than the output voltage of the power supply unit;

[0016] If the voltage of the negative clamp is greater than the output voltage of the power supply unit, the connection status of the vehicle emergency starter is determined to be reversed.

[0017] A further technical solution is that the method further includes:

[0018] Determine whether the voltage of the negative terminal clip is less than the output voltage of the power supply unit and greater than a preset first voltage value;

[0019] If the voltage of the negative clamp is not the output voltage of the power supply unit and is greater than a preset first voltage value, the connection status of the vehicle emergency starter power supply is determined to be positive.

[0020] A further technical solution is that the method further includes:

[0021] If the voltage of the negative clamp is equal to the first voltage value, the connection status of the vehicle emergency starter is determined to be floating.

[0022] If the voltage of the negative clamp is equal to the output voltage of the power supply unit, the connection status of the vehicle emergency starter is determined to be short-circuited.

[0023] A further technical solution is that the voltage of the negative electrode clip is collected, including:

[0024] The first switching unit is turned on, and the voltage of the negative electrode clip is collected by the high voltage detection unit;

[0025] If the voltage of the negative electrode clip is less than a preset voltage threshold, the second switching unit is controlled to turn on and the first switching unit is turned off, and the voltage of the negative electrode clip is collected by the low voltage detection unit.

[0026] Compared with the prior art, the technical effects achieved by the embodiments of the present invention include:

[0027] This invention provides a vehicle-mounted emergency jump starter with reverse connection and short-circuit protection, including a power supply unit, a control unit, a positive clamp, a negative clamp, a voltage detection unit, and a control unit. The positive terminal of the power supply unit is connected to the positive clamp, and the negative terminal is connected to the negative clamp. The voltage detection unit is connected to both the negative clamp and the control unit. The voltage detection unit detects the voltage of the negative clamp, and the connection status of the vehicle-mounted emergency jump starter is determined based on this voltage. By directly detecting the voltage of the negative clamp and determining the connection status of the vehicle-mounted emergency jump starter based on this voltage value, intelligent identification of the connection status of the vehicle-mounted emergency jump starter is achieved. Since the voltage of the negative clamp shows significant differences in floating, positive connection, reverse connection, and short-circuit states, this design only requires single-point voltage sampling to cover all abnormal operating conditions and controls the output voltage of the vehicle-mounted emergency jump starter only when positively connected, thereby greatly improving safety. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0031] Figure 1 This is a schematic diagram of the structure of a vehicle-mounted emergency starting power supply that is protected against reverse connection and short circuit according to an embodiment of the present invention;

[0032] Figure 2 This is a circuit diagram of a high-voltage detection unit and a low-voltage detection unit for a vehicle-mounted emergency starting power supply that is protected against reverse connection and short circuit, as proposed in an embodiment of the present invention.

[0033] Figure Labels

[0034] Power supply unit 1, control unit 2, positive clamp 3, negative clamp 4, voltage detection unit 5, first voltage divider unit 6, second voltage divider unit 7, high voltage detection unit 51, first switch unit 52, low voltage detection unit 53, second switch unit 54, alarm unit 8, power supply start switch unit 9, battery 10. Detailed Implementation

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Similar component reference numerals in the drawings represent similar components. Obviously, the embodiments described below are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0036] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0037] It should also be understood that the terminology used in this specification of embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of the invention. As used in this specification of embodiments of the invention and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0038] See Figure 1 This invention proposes a vehicle-mounted emergency jump starter that protects against reverse connection and short circuit. The vehicle-mounted emergency jump starter includes a power supply unit 1, a control unit 2, a positive clamp 3, a negative clamp 4, a voltage detection unit 5, and the control unit 2. The specific structure is described below:

[0039] The positive terminal of the power supply unit 1 is connected to the positive clamp 3, and the negative terminal of the power supply unit 1 is connected to the negative clamp 4. The voltage detection unit 5 is connected to both the negative clamp 4 and the control unit 2. The voltage detection unit 5 detects the voltage of the negative clamp 4, and the connection status of the vehicle emergency jump starter is determined based on the voltage of the negative clamp 4. The positive clamp 3 and the negative clamp 4 are used to connect to the positive and negative terminals of the vehicle's battery 10, respectively.

[0040] Specifically, power supply unit 1 can be a battery, but this invention is not specifically limited thereto. Control unit 2 can be an MCU, but this invention is not specifically limited thereto.

[0041] In this embodiment of the invention, a voltage detection unit 5 is set up to directly detect the voltage of the negative clamp 4, and the connection status of the vehicle emergency jump starter is determined based on the voltage value, thereby realizing intelligent identification of the connection status of the vehicle emergency jump starter. Since the voltage of the negative clamp 4 shows significant differences in floating, positive connection, reverse connection, and short circuit states, this design only requires single-point voltage sampling to cover all abnormal operating conditions, and controls the output voltage of the vehicle emergency jump starter only when positively connected, thereby greatly improving safety.

[0042] Furthermore, in some preferred embodiments, the vehicle-mounted emergency jump starter also includes a first voltage divider unit 6 and a second voltage divider unit 7, the positive clamp 3 is connected to the negative clamp 4 through the first voltage divider unit 6, and the negative clamp 4 is grounded through the second voltage divider unit 7.

[0043] In specific implementation, both the first voltage divider unit 6 and the second voltage divider unit 7 can be voltage divider resistors; however, this invention does not specifically limit the specific implementation.

[0044] In this embodiment of the invention, the first voltage divider unit 6 connects the positive clamp 3 and the negative clamp 4, and the second voltage divider unit 7 grounds the negative clamp 4, forming a resistor network voltage divider structure. This design allows the voltage of the negative clamp 4 to automatically decay to a fixed proportion (e.g., 1 / 16) of the voltage of the positive clamp 3 when it is floating. When connected in the correct direction, it reflects the voltage difference between the power supply unit 1 and the battery 10; when connected in the reverse direction, it superimposes the voltages of both; and when short-circuited, it is the same as the voltage of the positive clamp 3. By mathematically converting the four states into quantifiable voltage signals, the control unit 2 is provided with a discrimination basis that does not require additional sensors, significantly simplifying the hardware architecture.

[0045] For example, in a preferred embodiment, the resistance of the first voltage divider unit 6 is 300K ohms and the resistance of the second voltage divider unit 7 is 20K ohms. Based on the voltage divider law, the voltage of the negative clamp 4 when it is floating is 1 / 16 of the voltage of the positive clamp 3 (i.e., the output voltage of the power supply unit 1).

[0046] Furthermore, in some preferred embodiments, the voltage detection unit 5 includes a high-voltage detection unit 51 and a first switching unit 52. The high-voltage detection unit 51 is connected to the negative electrode clip 4 and the first switching unit 52, and the first switching unit 52 is connected to the control unit 2.

[0047] In specific implementation, the first switching unit 52 can be a MOSFET, and the switching of the first switching unit 52 can be controlled by the control unit 2.

[0048] In this embodiment of the invention, the high-voltage detection unit 51, in conjunction with the first switching unit 52, is specifically designed to handle high-voltage scenarios (such as a negative clamp 4 voltage > 10V during reverse / short-circuit connection). When the first switching unit 52 is controlled to conduct, the high-voltage detection unit 51 divides the high-voltage signal to the safe range of the main control chip, preventing high-voltage surges from damaging the control unit 2 and greatly ensuring safety.

[0049] Furthermore, in some preferred embodiments, the voltage detection unit 5 includes a low-voltage detection unit 53 and a second switching unit 54. The low-voltage detection unit 53 is connected to the negative terminal clip 4 and the second switching unit 54, and the second switching unit 54 is connected to the control unit 2.

[0050] In a specific implementation, the second switching unit 54 may be a MOSFET, and the switching of the second switching unit 54 may be controlled by the control unit 2.

[0051] In this embodiment of the invention, a low-voltage detection unit 53 and a second switching unit 54 are added to form a high- and low-voltage dual-path detection system. When the voltage of the negative clamp 4 is <10V, the second switching unit 54 conducts the low-voltage path for precise sampling. The low-voltage detection unit 53 improves the micro-voltage resolution through a small-ratio voltage divider or operational amplifier amplification, thereby improving the accuracy of detection.

[0052] See Figure 2 In this embodiment of the invention, the circuit structures of the high-voltage detection unit 51 and the low-voltage detection unit 53 can be the same, for example, both including: a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a capacitor C1, and a Zener diode D1; the first resistor R1 is connected to the second resistor R2, and the fourth resistor R4 is connected to the second resistor R2; the third resistor R3 is connected to the first resistor R1 and grounded, forming a voltage divider circuit; the capacitor C1 and the Zener diode D1 are connected to the fourth resistor R4 and grounded. The voltage signal is input to the first resistor R1 and output to the control unit by the fourth resistor R4. The control unit has a built-in ADC that samples the voltage signal and calculates the voltage value.

[0053] The differences between the high-voltage detection unit 51 and the low-voltage detection unit 53 include at least the fact that the resistance value of the first resistor R1 is different, thereby enabling detection of different voltage ranges. For example, in this embodiment, the resistance value of the first resistor R1 in the high-voltage detection unit 51 is 100K ohms; and the resistance value of the first resistor R1 in the low-voltage detection unit 53 is 10K ohms.

[0054] Furthermore, in some preferred embodiments, the voltage detection unit 5 further includes an alarm unit 8, which is connected to the control unit 2.

[0055] In specific implementation, the alarm unit 8 can be a buzzer or an indicator light, and the present invention does not specifically limit it.

[0056] In this embodiment of the invention, the alarm unit 8 is linked with the control unit 2, triggering an audible and visual alarm when abnormal states such as reverse connection or short circuit are detected. This design transforms the detection logic into real-time prompts that are perceptible to the user, avoiding equipment damage caused by misoperation. It is especially suitable for emergency start-up scenarios for non-professional users, improving product safety and operational fault tolerance.

[0057] Furthermore, in some preferred embodiments, the voltage detection unit 5 further includes a power supply start switch unit 9, which is connected to the negative terminal of the power supply unit 1, the control unit 2, and the negative terminal clip 4.

[0058] In specific implementation, the power supply start switch unit 9 can be a relay, and the power supply start switch unit 9 is controlled by the control unit 2.

[0059] In this embodiment of the invention, the power supply start-up switch unit 9 is connected in series between the negative terminal of the power supply unit 1 and the negative terminal clip 4, and is controlled by the control unit 2 based on the connection status determination result. When a reverse connection or short circuit is detected, the output circuit is immediately cut off to prevent the power supply unit 1 from being damaged by a large current surge; the circuit is closed only in the positive connection state, realizing a full closed-loop control of "detection-decision-protection" from a physical level.

[0060] Accordingly, embodiments of the present invention provide a control method for the above-mentioned reverse connection and short circuit protection vehicle emergency starting power supply, the method comprising the following steps:

[0061] S1, collects the voltage of the negative clamp.

[0062] S2, determine whether the voltage of the negative clamp is greater than the output voltage of the power supply unit.

[0063] S3, if the voltage of the negative clamp is greater than the output voltage of the power supply unit, it is determined that the connection status of the vehicle emergency start power supply is reversed.

[0064] In practical implementation, during reverse connection, the voltage of the negative clamp is equal to the sum of the output voltage of the power supply unit and the battery voltage of the vehicle. Therefore, by directly comparing the numerical relationship between the voltage of the negative clamp and the output voltage of the power supply unit, efficient determination of the reverse connection state can be achieved. When the voltage of the negative clamp is greater than the output voltage of the power supply unit, protection can be triggered without complex algorithms, significantly reducing software processing overhead.

[0065] Furthermore, the method also includes:

[0066] S4, determine whether the voltage of the negative terminal clip is less than the output voltage of the power supply unit and greater than a preset first voltage value;

[0067] S5. If the voltage of the negative clamp is not the output voltage of the power supply unit and is greater than the preset first voltage value, the connection status of the vehicle emergency start power supply is determined to be positive.

[0068] In specific implementation, the first voltage value is less than the output voltage of the power supply unit. The first voltage value can be set to the theoretical value when it is floating, for example, it can be set to 1 / 16 of the output voltage. This invention does not specifically limit the value.

[0069] In this embodiment of the invention, when the battery is positively connected, the characteristic is that the voltage of the negative clamp is equal to the difference between the output voltage of the power supply unit and the battery of the car. By introducing a first voltage value (such as the theoretical floating value CAR_BAT+ / 16) as a judgment threshold, and combining it with the condition that "the voltage of the negative clamp is less than the output voltage of the power supply unit and greater than the first voltage value", the positive connection state is accurately identified. By comparing the dual voltages, floating interference is eliminated, and the robustness of the judgment under weak signals is improved.

[0070] Furthermore, the method also includes:

[0071] S6, if the voltage of the negative clamp is equal to the first voltage value, the connection status of the vehicle emergency starter power supply is determined to be floating.

[0072] S7. If the voltage of the negative clamp is equal to the output voltage of the power supply unit, the connection status of the vehicle emergency start power supply is determined to be short-circuited.

[0073] In practice, deterministic determinations of floating (negative clamp voltage = first voltage value) and short-circuit (negative clamp voltage = power supply unit output voltage) are achieved through equivalent comparison. Floating detection relies on the fixed ratio characteristics of the voltage divider resistor network, while short-circuit detection utilizes the zero-impedance connection characteristics; neither requires an external reference source. This method transforms the circuit's physical characteristics into software-recognizable digital boundary conditions, forming a complete state decision tree.

[0074] Furthermore, in some preferred embodiments, the above step of "collecting the voltage of the negative electrode clip" specifically includes the following steps: controlling the first switching unit to conduct, and collecting the voltage of the negative electrode clip through the high voltage detection unit; if the voltage of the negative electrode clip is less than a preset voltage threshold, controlling the second switching unit to conduct and disconnecting the first switching unit, and collecting the voltage of the negative electrode clip through the low voltage detection unit.

[0075] In practice, a dynamic and safe voltage detection mechanism is constructed by setting a process of "firstly conducting the first switching unit to collect high-voltage signals, and only switching to the second switching unit for low-voltage acquisition when the voltage of the negative clamp is less than a preset voltage threshold (such as 10V)".

[0076] This design first utilizes the safe withstand voltage characteristics of the high-voltage detection unit to shield against dangerous high-voltage surges (such as 30V voltage during reverse connection). After confirming that the voltage is within a safe range, a high-precision low-voltage detection unit is then activated to analyze minute voltage differences (such as voltage when the circuit is floating or underpowered). This step-by-step strategy avoids chip damage caused by direct contact between the low-voltage circuit and the high-voltage circuit, while also covering the full range of detection requirements from 0V to 30V+ through the synergy of high and low voltage paths. It achieves a balance between detection safety and accuracy solely through methodological innovation.

[0077] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0078] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0079] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0080] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0081] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0082] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0083] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Since these modifications and variations fall within the scope of the claims and their equivalents, this invention also intends to include these modifications and variations.

[0084] The above description describes specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A vehicle-mounted emergency jump starter that protects against reverse connection and short circuit, characterized in that, The device includes a power supply unit, a control unit, a positive clamp, a negative clamp, a voltage detection unit, and a control unit. The positive terminal of the power supply unit is connected to the positive clamp, and the negative terminal of the power supply unit is connected to the negative clamp. The voltage detection unit is connected to both the negative clamp and the control unit. The voltage detection unit detects the voltage of the negative clamp and determines the connection status of the vehicle emergency starter power supply based on the voltage of the negative clamp.

2. The vehicle-mounted emergency starting power supply with reverse connection and short circuit protection according to claim 1, characterized in that, The vehicle-mounted emergency jump starter also includes a first voltage divider unit and a second voltage divider unit. The positive clamp is connected to the negative clamp through the first voltage divider unit, and the negative clamp is grounded through the second voltage divider unit.

3. The vehicle-mounted emergency starting power supply with reverse connection and short circuit protection according to claim 1, characterized in that, The voltage detection unit includes a high voltage detection unit and a first switch unit. The high voltage detection unit is connected to the negative electrode clip and the first switch unit, and the first switch unit is connected to the control unit.

4. The vehicle-mounted emergency starting power supply with reverse connection and short circuit protection according to claim 3, characterized in that, The voltage detection unit includes a low-voltage detection unit and a second switching unit. The low-voltage detection unit is connected to the negative terminal clip and the second switching unit, and the second switching unit is connected to the control unit.

5. The vehicle-mounted emergency starting power supply with reverse connection and short circuit protection according to claim 1, characterized in that, The vehicle-mounted emergency jump starter also includes an alarm unit, which is connected to the control unit.

6. The vehicle-mounted emergency starting power supply with reverse connection and short circuit protection according to claim 1, characterized in that, The vehicle-mounted emergency jump starter also includes a power supply start switch unit, which is connected to the negative terminal of the power supply unit, the control unit, and the negative terminal clip.

7. The control method for a vehicle-mounted emergency starting power supply with reverse connection and short circuit protection as described in any one of claims 1-6, characterized in that, The method includes: Collect the voltage of the negative terminal clamp; Determine whether the voltage of the negative clamp is greater than the output voltage of the power supply unit; If the voltage of the negative clamp is greater than the output voltage of the power supply unit, the connection status of the vehicle emergency starter is determined to be reversed.

8. The method according to claim 7, characterized in that, The method further includes: Determine whether the voltage of the negative terminal clip is less than the output voltage of the power supply unit and greater than a preset first voltage value; If the voltage of the negative clamp is not the output voltage of the power supply unit and is greater than a preset first voltage value, the connection status of the vehicle emergency starter power supply is determined to be positive.

9. The method according to claim 7, characterized in that, The method further includes: If the voltage of the negative clamp is equal to the first voltage value, the connection status of the vehicle emergency starter is determined to be floating. If the voltage of the negative clamp is equal to the output voltage of the power supply unit, the connection status of the vehicle emergency starter is determined to be short-circuited.

10. The method according to claim 7, characterized in that, The voltage of the negative electrode clip is collected, including: The first switching unit is turned on, and the voltage of the negative electrode clip is collected by the high voltage detection unit; If the voltage of the negative electrode clip is less than a preset voltage threshold, the second switching unit is controlled to turn on and the first switching unit is turned off, and the voltage of the negative electrode clip is collected by the low voltage detection unit.

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