Anti-reverse connection circuit and vehicle-mounted emergency starting power supply

Abstract

This utility model discloses a reverse connection protection circuit and a vehicle emergency starter power supply, relating to the field of power safety protection technology. It includes a positive clamp, a negative clamp, a coil, an N-level Hall sensor, and a S-level Hall sensor. The two ends of the coil are connected to the positive clamp and the negative clamp, respectively. Both the N-level and S-level Hall sensors are located within the magnetic field induction range of the coil. This utility model can determine the connection status of the positive and negative clamps based on the N-level and S-level Hall sensors, accurately determining whether the positive and negative clamps are connected correctly or incorrectly. This effectively prevents the emergency starter power supply from outputting power in reverse connection mode, greatly improving safety.

Description

Technical Field

[0001] This utility model relates to the field of power safety protection technology, and in particular to a reverse connection protection circuit and a vehicle emergency starter. Background Technology

[0002] An emergency jump starter needs to be connected to the car battery when starting a car in an emergency. An emergency jump starter has positive and negative terminals; when connecting it to the car battery, the positive and negative terminals of the jump starter must be correctly connected.

[0003] However, users may not be able to connect it correctly the first time they use it. If it is connected incorrectly, there will be significant safety issues. Utility Model Content

[0004] The technical problem to be solved by this utility model embodiment is how to accurately detect the connection status of the emergency start-up power supply and improve the safety of using the emergency start-up power supply.

[0005] To address the aforementioned problems, in a first aspect, this utility model provides a reverse connection protection circuit, comprising a positive clamp, a negative clamp, a coil, an N-level Hall sensor, an S-level Hall sensor, and a control unit; the two ends of the coil are respectively connected to the positive clamp and the negative clamp; both the N-level Hall sensor and the S-level Hall sensor are located within the magnetic field induction range of the coil; both the N-level Hall sensor and the S-level Hall sensor are connected to the control unit; and the control unit is connected to the start switch unit of the vehicle emergency starter power supply.

[0006] A further technical solution is that the N-level detection Hall sensor includes a first signal output pin, which is connected to the control unit and grounded through a first capacitor.

[0007] A further technical solution is that the S-level detection Hall sensor includes a second signal output pin, which is connected to the control unit, and the second signal output pin is grounded through a second capacitor.

[0008] A further technical solution is that the reverse connection protection circuit also includes a current limiting unit, the positive clamp is connected to the coil through the current limiting unit, and the current limiting unit includes at least one current limiting resistor.

[0009] A further technical solution is that the reverse connection protection circuit further includes a buzzer unit, which includes a buzzer and a first controllable switch. The buzzer is connected to the first controllable switch. The first controllable switch is connected to the control unit and is controlled by the control unit.

[0010] A further technical solution is that the reverse connection protection circuit further includes a first indicator light unit, which includes a first indicator light and a second controllable switch. The first indicator light is connected to the second controllable switch; the second controllable switch is connected to the control unit and is controlled by the control unit.

[0011] A further technical solution is that the reverse connection protection circuit further includes a second indicator light unit, which includes a second indicator light and a third controllable switch. The second indicator light is connected to the third controllable switch. The third controllable switch is connected to the control unit and is controlled by the control unit.

[0012] A further technical solution is that the first controllable switch, the second controllable switch, and the third controllable switch are transistors.

[0013] Secondly, this utility model provides a vehicle-mounted emergency jump starter, which includes the reverse connection protection circuit described in the first aspect.

[0014] Compared with the prior art, the technical effects achieved by the embodiments of this utility model include:

[0015] This invention provides a reverse connection protection circuit, comprising a positive clamp, a negative clamp, a coil, an N-level Hall sensor, a S-level Hall sensor, a control unit, and a start switch unit. The two ends of the coil are connected to the positive clamp and the negative clamp, respectively. Both the N-level and S-level Hall sensors are located within the magnetic field induction range of the coil. Both the N-level and S-level Hall sensors are connected to the control unit. The control unit is connected to the start switch unit. This invention can determine the connection status of the positive and negative clamps based on the N-level and S-level Hall sensors, accurately determining whether the positive and negative clamps are connected correctly or incorrectly, thereby effectively preventing the emergency start power supply from outputting when reversed, greatly improving safety. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model 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.

[0018] 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.

[0019] Figure 1 A circuit diagram of a reverse connection protection circuit proposed in an embodiment of this utility model;

[0020] Figure 2 A circuit diagram of a buzzer unit with a reverse connection protection circuit proposed in an embodiment of this utility model;

[0021] Figure 3 A circuit diagram of the first indicator light unit of a reverse connection protection circuit proposed in an embodiment of this utility model;

[0022] Figure 4 A circuit diagram of a second indicator light unit for a reverse connection protection circuit proposed in an embodiment of this utility model;

[0023] Figure 5 A circuit diagram of a start-up switch unit for a reverse connection protection circuit proposed in an embodiment of this utility model;

[0024] Figure 6 This is a circuit block diagram of a reverse connection protection circuit proposed in an embodiment of the present invention.

[0025] Figure Labels

[0026] Positive clamp CAR_BAT+, negative clamp CAR_BAT-, coil L100, N-level Hall sensor U101, S-level Hall sensor U102, first capacitor C103, second capacitor C105, buzzer BUZZER100, first controllable switch Q101, first indicator light D_A100, second controllable switch Q102, second indicator light D_A100, third controllable switch Q103, MOSFET Q100, relay U103, control unit 10, buzzer unit 20, first indicator light unit 30, second indicator light unit 40, start switch unit 50. Detailed Implementation

[0027] The technical solutions in the embodiments of this utility model 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 this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] 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.

[0029] It should also be understood that the terminology used in this specification of embodiments of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of the present invention. As used in this specification of embodiments of the present 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.

[0030] See Figures 1-6 This utility model embodiment proposes a reverse connection protection circuit for use in emergency start-up power supplies. The reverse connection protection circuit includes a positive clamp CAR_BAT+, a negative clamp CAR_BAT-, a coil L100, an N-level Hall sensor U101, and an S-level Hall sensor U102. The specific structure is described below:

[0031] The positive clamp CAR_BAT+ is used to connect to the positive terminal of the car battery, and the negative clamp CAR_BAT- is used to connect to the negative terminal. Specifically, when connecting the positive clamp CAR_BAT+ to the positive terminal and the negative clamp CAR_BAT- to the negative terminal, the connection is correct and is called "positive connection." Conversely, if the positive clamp CAR_BAT+ is connected to the negative terminal and the negative clamp CAR_BAT- to the positive terminal, the connection is incorrect and is called "reverse connection."

[0032] The two ends of the coil L100 are connected to the positive clamp CAR_BAT+ and the negative clamp CAR_BAT-, respectively. The coil L100 can be wound clockwise or counterclockwise; this invention does not specifically limit this. For example, in this embodiment, the coil L100 is wound clockwise. Understandably, during use, the current in the coil L100 comes from the battery. Even when the battery is depleted, it still has a weak output, causing current to flow through the coil L100.

[0033] Both the N-level Hall sensor U101 and the S-level Hall sensor U102 are located within the magnetic field sensing range of the coil L100, for example, inside the coil L100. Both the N-level Hall sensor U101 and the S-level Hall sensor U102 are unipolar Hall sensors. The N-level Hall sensor U101 can detect the N-level of the magnetic field, and the S-level Hall sensor U102 can detect the S-level of the magnetic field.

[0034] Since the direction of the current in the coil L100 is different when it is connected in the positive direction and the direction of the magnetic field is different, the detection states of the N-level Hall sensor U101 and the S-level Hall sensor U102 are different. Therefore, based on the detection states of the N-level Hall sensor U101 and the S-level Hall sensor U102, it is possible to accurately determine whether the current connection is positive or negative.

[0035] This invention provides a reverse connection protection circuit, comprising a positive clamp CAR_BAT+, a negative clamp CAR_BAT-, a coil L100, an N-level Hall sensor U101, and an S-level Hall sensor U102. The two ends of the coil L100 are connected to the positive clamp CAR_BAT+ and the negative clamp CAR_BAT-, respectively. Both the N-level Hall sensor U101 and the S-level Hall sensor U102 are located within the magnetic field sensing range of the coil L100. This invention can determine the connection status of the positive clamp CAR_BAT+ and the negative clamp CAR_BAT- based on the N-level Hall sensor U101 and the S-level Hall sensor U102, accurately determining whether the positive clamp CAR_BAT+ and the negative clamp CAR_BAT- are connected correctly or incorrectly. This effectively prevents the emergency starter power supply from outputting power in reverse connection, greatly improving safety.

[0036] Furthermore, in some preferred embodiments, a control unit 10 is also included, wherein both the N-level detection Hall sensor U101 and the S-level detection Hall sensor U102 are connected to the control unit 10; the control unit 10 is connected to the start switch unit 50 of the vehicle emergency start power supply. Specifically, see [link to relevant documentation]. Figure 5 The start-up switch unit 50 may include a MOSFET Q100 and a relay U103. The MOSFET Q100 is connected to the relay U103, and the relay U103 is connected to the output terminal of the vehicle emergency start-up power supply. The MOSFET Q100 is also connected to the control unit 10 and is controlled by the control unit 10. The control unit 10 controls the relay U103 to be turned on / off through the MOSFET Q100.

[0037] Specifically, the control unit 10 is used to execute a reverse connection prevention method, which includes: the control unit 10 acquiring the sensing signals of the N-level detection Hall sensor U101 and the S-level detection Hall sensor U102; the control unit 10 determining the connection status of the positive clamp CAR_BAT+ and the negative clamp CAR_BAT- based on the detection signals of the N-level detection Hall sensor U101 and the S-level detection Hall sensor U102; if the positive clamp CAR_BAT+ and the negative clamp CAR_BAT- are connected in the correct direction, the control unit 10 controls the start switch unit 50 to close; if the positive clamp CAR_BAT+ and the negative clamp CAR_BAT- are connected in the reverse direction, the control unit 10 controls the start switch unit 50 to open.

[0038] Specifically, the control unit 10 receives the sensing signals from the N-level Hall sensor U101 and the S-level Hall sensor U102 in real time.

[0039] The control unit 10 determines the connection status of the positive clip CAR_BAT+ and the negative clip CAR_BAT- based on the detection signals of the N-level Hall sensor U101 and the S-level Hall sensor U102. The connection status includes not connected, positive connection, and reverse connection.

[0040] Specifically, in this embodiment, coil L100 is wound clockwise. When the positive clamp CAR_BAT+ and the negative clamp CAR_BAT- are not connected, coil L100 has no current, and the detection signals of the N-level Hall sensor U101 and the S-level Hall sensor U102 are both high-level signals. Therefore, if the detection signals of the N-level Hall sensor U101 and the S-level Hall sensor U102 are both high-level signals, the current connection state is determined to be unconnected.

[0041] Furthermore, when the positive clamp CAR_BAT+ and the negative clamp CAR_BAT- are connected in the correct direction, the coil L100 experiences a clockwise current. The detection signal from the N-level Hall sensor U101 is a low-level signal, and the detection signal from the S-level Hall sensor U102 is a high-level signal. Therefore, if the detection signal from the N-level Hall sensor U101 is low and the detection signal from the S-level Hall sensor U102 is high, the current connection state is determined to be positive.

[0042] Furthermore, when the positive clamp CAR_BAT+ and the negative clamp CAR_BAT- are reversed, the coil L100 experiences a counterclockwise current. The detection signal of the N-level Hall sensor U101 is a high-level signal, and the detection signal of the S-level Hall sensor U102 is a low-level signal. Therefore, if the detection signal of the N-level Hall sensor U101 is high and the detection signal of the S-level Hall sensor U102 is low, the current connection state is determined to be reversed.

[0043] In this embodiment of the present invention, if the positive clamp CAR_BAT+ and the negative clamp CAR_BAT- are connected in the correct direction, the control unit 10 controls the start switch unit 50 to close, and at this time the vehicle emergency start power supply can be output to the outside.

[0044] If the positive clamp CAR_BAT+ and the negative clamp CAR_BAT- are reversed, the control unit 10 controls the start switch unit 50 to disconnect. At this time, the vehicle emergency start power supply cannot output externally, thus ensuring safety by preventing output when reversed.

[0045] Furthermore, in some preferred embodiments, such as this embodiment, the N-level detection Hall sensor U101 includes a first signal output pin, which is connected to the control unit 10, and the first signal output pin is grounded through a first capacitor C103.

[0046] Specifically, the first capacitor C103 acts as a filter, which greatly improves the stability of the detection signal of the N-level Hall sensor U101 and effectively avoids false detection.

[0047] Furthermore, in some preferred embodiments, such as this embodiment, the S-level detection Hall sensor U102 includes a second signal output pin, which is connected to the control unit 10, and the second signal output pin is grounded through a second capacitor C105.

[0048] Specifically, the second capacitor C105 acts as a filter, which greatly improves the stability of the detection signal of the S-level detection Hall sensor U102 and effectively avoids false detection.

[0049] Furthermore, in some preferred embodiments, such as this embodiment, the reverse connection protection circuit further includes a current limiting unit, and the positive clamp CAR_BAT+ is connected to the coil L100 through the current limiting unit, the current limiting unit including at least one current limiting resistor.

[0050] Specifically, the current limiting unit limits the current to prevent excessive current. For example, see... Figure 1 In this embodiment, the current limiting unit includes two current limiting resistors R102 and R103, which are connected in parallel.

[0051] Furthermore, in some preferred embodiments, such as this embodiment, the reverse connection protection circuit further includes a buzzer unit 20, which includes a buzzer BUEEER100 and a first controllable switch Q101. The buzzer BUEEER100 is connected to the first controllable switch Q101. The first controllable switch Q101 is connected to the control unit 10 and is controlled by the control unit 10.

[0052] Specifically, the first controllable switch Q101 is a transistor. The base of the first controllable switch Q101 is connected to the control unit 10, the collector of the first controllable switch Q101 is connected to the buzzer BUEEER100, and the emitter of the first controllable switch Q101 is grounded. When the first controllable switch Q101 is turned on, the buzzer BUEEER100 is activated; when the first controllable switch Q101 is turned off, the buzzer BUEEER100 is deactivated.

[0053] Furthermore, the reverse connection protection circuit also includes a first indicator light unit 30, which includes a first indicator light D_A100 and a second controllable switch Q102. The first indicator light D_A100 is connected to the second controllable switch Q102. The second controllable switch Q102 is connected to the control unit 10 and is controlled by the control unit 10.

[0054] Specifically, the first indicator light D_A100 is an LED that emits green light. The second controllable switch Q102 is a transistor. The base of the second controllable switch Q102 is connected to the control unit 10, the collector of the second controllable switch Q102 is connected to the first indicator light D_A100, and the emitter of the second controllable switch Q102 is grounded. When the second controllable switch Q102 is turned on, the first indicator light D_A100 is activated; when the second controllable switch Q102 is turned off, the first indicator light D_A100 is deactivated.

[0055] Furthermore, the reverse connection protection circuit also includes a second indicator unit 40, which includes a second indicator D_A101 and a third controllable switch Q103. The second indicator D_A101 is connected to the third controllable switch Q103. The third controllable switch Q103 is connected to the control unit 10 and is controlled by the control unit 10.

[0056] Specifically, the second indicator light D_A101 is an LED that emits red light. The third controllable switch Q103 is a transistor. The base of the third controllable switch Q103 is connected to the control unit 10, the collector of the third controllable switch Q103 is connected to the second indicator light D_A101, and the emitter of the third controllable switch Q103 is grounded. When the third controllable switch Q103 is turned on, the second indicator light D_A101 is activated; when the third controllable switch Q103 is turned off, the second indicator light D_A101 is deactivated.

[0057] In this embodiment of the utility model, the control logic for the buzzer BUEEER100, the first indicator light D_A100, and the second indicator light D_A101 is as follows:

[0058] 1. When the clips and the positive and negative terminals of the car battery are connected correctly, the control unit 10 controls the buzzer BUEEER100 to sound continuously, and at the same time controls the first indicator light D_A100 (green light) to stay on. At this time, the vehicle emergency jump starter can be used for emergency starting.

[0059] 2. When the clamp and the positive and negative terminals of the car battery are reversed, the control unit 10 controls the buzzer BUEEER100 to sound at a frequency of 0.5s, and at the same time controls the second indicator light D_A101 (red light) to flash. At this time, the vehicle emergency jump starter cannot be used for emergency starting.

[0060] This utility model provides a vehicle-mounted emergency jump starter, which includes the reverse connection protection circuit described in any of the above embodiments.

[0061] 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.

[0062] In the description of this utility model, 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", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0063] 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 utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0064] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 utility model according to the specific circumstances.

[0065] 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.

[0066] 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 present 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.

[0067] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Since these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

[0068] The above description describes specific embodiments of this utility model, but the scope of protection of this utility model 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 this utility model, and these modifications or substitutions should all be covered within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. An anti-reverse connection circuit, characterized by, Applications include vehicle emergency jump starters, including positive clamps, negative clamps, coils, N-level Hall sensors, and S-level Hall sensors; The two ends of the coil are connected to the positive clamp and the negative clamp, respectively; the N-level Hall sensor and the S-level Hall sensor are both located within the magnetic field sensing range of the coil.

2. The reverse connection prevention circuit according to claim 1, characterized by It also includes a control unit, and both the N-level detection Hall sensor and the S-level detection Hall sensor are connected to the control unit; the control unit is connected to the start switch unit of the vehicle emergency start power supply.

3. The reverse connection prevention circuit according to claim 1, wherein The N-level Hall sensor includes a first signal output pin, which is connected to the control unit and grounded through a first capacitor.

4. The reverse-connection prevention circuit according to claim 1, characterized by, The S-level Hall sensor includes a second signal output pin, which is connected to the control unit and grounded through a second capacitor.

5. The reverse-connection prevention circuit according to claim 1, wherein The reverse connection protection circuit also includes a current limiting unit. The positive clamp is connected to the coil through the current limiting unit, and the current limiting unit includes at least one current limiting resistor.

6. The reverse-connection prevention circuit according to claim 1, wherein The reverse connection protection circuit also includes a buzzer unit, which includes a buzzer and a first controllable switch. The buzzer is connected to the first controllable switch. The first controllable switch is connected to the control unit and is controlled by the control unit.

7. The reverse connection protection circuit according to claim 6, characterized in that, The reverse connection protection circuit further includes a first indicator light unit, which includes a first indicator light and a second controllable switch. The first indicator light is connected to the second controllable switch. The second controllable switch is connected to the control unit and is controlled by the control unit.

8. The reverse connection protection circuit according to claim 7, characterized in that, The reverse connection protection circuit further includes a second indicator unit, which includes a second indicator light and a third controllable switch. The second indicator light is connected to the third controllable switch. The third controllable switch is connected to the control unit and is controlled by the control unit.

9. The reverse connection protection circuit according to claim 8, characterized in that, The first controllable switch, the second controllable switch, and the third controllable switch are transistors.

10. A vehicle-mounted emergency jump starter, characterized in that, Includes the reverse connection protection circuit as described in any one of claims 1-9.

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