Reverse connection prevention device, reverse connection prevention system and vehicle

Abstract

The utility model relates to an anti-reverse-connection device, an anti-reverse-connection system and a vehicle, relates to the technical field of vehicles, and is used for solving the problem that devices in the vehicle are damaged due to reverse connection of a positive electrode and a negative electrode when a storage battery is powered on. The anti-reverse-connection device comprises a positive electrode lead, a negative electrode lead, an on-off assembly and an anti-reverse-connection controller; the anode lead comprises a first end connected with the anode of the battery and a second end connected with the anode of an external power supply; the cathode lead comprises a third end connected with the cathode of the battery and a fourth end connected with the cathode of an external power supply; the on-off assembly is at least partially arranged on the positive electrode lead; the anti-reverse controller is connected between the positive lead and the negative lead, and is suitable for controlling the on-off assembly to be connected when the positive electrode of the external power supply is connected with the second end and the negative electrode of the external power supply is connected with the fourth end, so that the positive lead is connected. The reverse connection prevention device is used for preventing reverse current from directly flowing into a storage battery when an external power supply is reversely connected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a reverse connection prevention device, a reverse connection prevention system and a vehicle. BACKGROUND

[0002] With the continuous improvement of the intelligence level of electric vehicles, the demand of users for vehicle function experience is also increasing, which leads to the continuous increase in the number of vehicle electrical equipment, thereby causing the increase in the static current of the whole vehicle. The increase in the static current will cause the small battery of the long-time parked vehicle to be at risk of running out of power in the case of low battery power and inability to perform intelligent power compensation.

[0003] Since the small battery of the vehicle is the source of starting of all controllers of the electric vehicle, after the small battery runs out of power, the whole vehicle will be unable to start, enter the gear, and travel. Although the external power compensation of the traditional method can solve the problem of running out of power, the small battery of the electric vehicle is easily reversed when connected, which will cause damage to the internal devices (such as DCDC converters) connected to the small battery in the vehicle, thereby causing the whole vehicle to be unable to travel.

[0004] In related technologies, CN202221834053.X (Vehicle intelligent power distribution box and vehicle) provides a vehicle intelligent power distribution box and vehicle, which mentions an intelligent power distribution box, which includes a main power supply branch, a plurality of power supply distribution branches, a communication chip, a main control chip and a driving chip, wherein the output end of each power supply distribution branch is connected to the corresponding load, and a power distribution electronic switch is arranged on each power supply distribution branch; the communication chip sends the power-on instruction to the main control chip when receiving the power-on instruction, and the main control chip drives and controls the power distribution electronic switch on the corresponding power supply distribution branch through the driving chip according to the power-on instruction. When the sampling chip samples an abnormally large current, it is transmitted to the main control chip through the communication chip, and the main control chip gives an instruction to the driving chip to directly control the power distribution electronic switch to be turned off, thereby achieving the protection of the charger and the internal devices of the vehicle. However, the intelligent power distribution box in the related technology has a complex structure and lacks cost advantages. UTILITY MODEL CONTENTS

[0005] One of the purposes of the utility model is to provide a reverse connection prevention device to solve the problem of damage to the internal devices of the vehicle caused by the reversal of the positive and negative poles when the battery is connected. The second purpose of the utility model is to provide a reverse connection prevention system. The third purpose of the utility model is to provide a vehicle.

[0006] In order to achieve the above purposes, the technical scheme adopted by the utility model is as follows:

[0007] In a first aspect, the embodiments of the present application provide a reverse connection prevention device, comprising: a positive electrode lead, a negative electrode lead, a switch-on-off assembly, and a reverse connection prevention controller, the positive electrode lead comprising a first end for connecting with a positive electrode of a battery and a second end for connecting with a positive electrode of an external power source; the negative electrode lead comprising a third end for connecting with a negative electrode of the battery and a fourth end for connecting with a negative electrode of the external power source; the switch-on-off assembly being at least partially arranged on the positive electrode lead; the reverse connection prevention controller being connected between the positive electrode lead and the negative electrode lead and being adapted to control the switch-on-off assembly to be connected when the positive electrode of the external power source is connected with the second end and the negative electrode of the external power source is connected with the fourth end, so as to make the positive electrode lead connected.

[0008] According to the above technical means, the reverse connection prevention device detects the connection polarity of the external power source by the reverse connection prevention controller, and only when the positive electrode of the external power source is connected with the second end of the positive electrode lead and the negative electrode is connected with the fourth end of the negative electrode lead (i.e. the positive and negative electrodes are correctly connected), the reverse connection prevention controller controls the switch-on-off assembly to be connected, and then the positive electrode lead is connected, forming a complete current path. Once the positive and negative electrodes are connected in reverse, the switch-on-off assembly will not be connected, and the circuit cannot form a path, thereby effectively preventing the reverse current from being generated, and avoiding the damage of internal devices of the vehicle caused by reverse connection. In addition, the reverse connection prevention device is composed of the positive electrode lead, the negative electrode lead, the switch-on-off assembly, and the reverse connection prevention controller, and has a simple and compact structure, which is convenient for integration and installation.

[0009] In some embodiments, the switch-on-off assembly comprises: a first controllable switch, a relay, and a second controllable switch, the first controllable switch being electrically connected with the reverse connection prevention controller; the relay being connected in series with the first controllable switch between the positive electrode lead and the negative electrode lead; and the second controllable switch being arranged on the negative electrode lead and being adapted to cooperate with a contact of the relay, so as to make the second controllable switch connected when the relay is powered.

[0010] According to the above technical means, since the first controllable switch is electrically connected with the reverse connection prevention controller, the first controllable switch is accurately controlled by the reverse connection prevention controller. Thus, the reverse connection prevention controller identifies the positive and negative polarities when the external power source is connected, and only when the positive and negative electrodes of the external power source are correctly connected, i.e. the positive electrode is connected with the second end of the positive electrode lead and the negative electrode is connected with the fourth end of the negative electrode lead, the reverse connection prevention controller sends a conduction signal to the first controllable switch, and the first controllable switch is turned on after receiving the signal.

[0011] Since the relay is connected in series with the first controllable switch between the positive electrode lead and the negative electrode lead, when the first controllable switch is turned on, the current passes through the relay, the relay is powered, and the contact of the relay is actuated, and then the second controllable switch is connected. Thus, it is equivalent to setting double insurance for the circuit conduction, and only when both conditions (i.e. the first controllable switch is turned on and the relay is powered) are met, the positive electrode lead is connected, which greatly reduces the risk of failure of the reverse connection prevention function caused by the failure of a certain element, and enhances the reliability of the reverse connection prevention.

[0012] In some embodiments, the anti-reverse connection device further comprises: a resistor connected between the relay and the positive lead.

[0013] According to the above technical means, the relay will generate a large current at the moment of energization due to the inductance characteristics of its coil. This current may cause damage to the relay itself and other elements connected thereto (such as the first controllable switch, the anti-reverse controller, etc.). By setting a resistor, the current can be effectively limited, avoiding excessive current impact on the elements and prolonging the service life of the elements.

[0014] In some embodiments, the resistor is an absorption resistor. According to the above technical means, at the moment of external power supply access, the current in the circuit will rise rapidly, generating a surge current. The absorption resistor can buffer this rapidly changing current. When the current suddenly increases, the absorption resistor will consume part of the electrical energy, limiting the rising rate of the current, and avoiding damage to elements such as relays and controllable switches caused by excessive surge current.

[0015] In some embodiments, the first controllable switch is a MOS tube. According to the above technical means, since the MOS tube has extremely low on-resistance, when it is turned on in the anti-reverse connection device, it can effectively reduce the power loss in the circuit. For example, in a high-current application scenario, lower on-resistance means less heat generated on the MOS tube when transmitting the same current, which not only improves the conversion efficiency of electrical energy and reduces energy waste, but also reduces the requirement for heat dissipation devices, helping to reduce the size and cost of the entire anti-reverse connection device.

[0016] In some embodiments, the first controllable switch is a relay. According to the above technical means, since the relay can achieve electrical isolation between the input circuit (control end, i.e. the part where the anti-reverse controller is connected to the relay coil) and the output circuit (controlled end, i.e. the part where the relay is located). In this way, the control signal can be effectively protected from the influence of high voltage and large current in the output circuit, and at the same time, the output circuit failure can also be prevented from affecting the anti-reverse controller, improving the stability and safety of the entire anti-reverse connection device.

[0017] In a second aspect, the embodiments of the present application also provide an anti-reverse connection system, comprising the anti-reverse connection device of the first aspect and a battery, the battery comprising a battery positive electrode and a battery negative electrode, the battery positive electrode being connected to the first end, and the battery negative electrode being connected to the third end.

[0018] According to the above technical means, when the positive and negative poles of the external power supply are correctly connected to the second end and the fourth end of the anti-reverse connection device, the on-off component in the anti-reverse connection device is turned on under the control of the anti-reverse controller, and the battery can be normally charged or discharged. Once the positive and negative poles of the external power supply are reversed, the on-off component will not be turned on, thereby preventing reverse current from flowing into the battery.

[0019] In some embodiments, the reverse connection prevention system further comprises a DCDC converter connected between the positive electrode of the battery and the negative electrode of the battery.

[0020] According to the above technical means, when the battery (also referred to as the storage battery) of the vehicle is in a low power state, if the positive and negative electrodes of the external power supply are connected reversely, the current will not be transmitted to the DCDC converter, so that the DCDC converter can be prevented from being damaged, and the power interruption of the vehicle can be avoided. In addition, the DCDC converter is integrated in the electric drive or other parts of the vehicle, and the disassembly, maintenance and replacement cost is high, and the maintenance cost is high. By setting the reverse connection prevention system, the high maintenance cost caused by the damage of the DCDC converter due to the reverse connection can be avoided.

[0021] In some embodiments, the reverse connection prevention system further comprises a power connection switch, which comprises a power connection positive electrode and a power connection negative electrode, the power connection positive electrode is connected to the second end, and the power connection negative electrode is connected to the fourth end.

[0022] According to the above technical means, the setting of the power connection switch makes the connection of the external power supply simple and convenient. The user only needs to connect the positive and negative electrodes of the power connection wire to the power connection positive electrode and the power connection negative electrode of the power connection switch, without complex operation or adjustment of the system, the connection of the external power supply and the system can be realized.

[0023] In a third aspect, the embodiments of the present application further provide a vehicle, which comprises the reverse connection prevention system described in the second aspect.

[0024] Since the vehicle provided by the embodiments of the present application comprises the reverse connection prevention system in the second aspect, the same technical problems as the reverse connection prevention system can be solved, and the same technical effects can be achieved. Here, no longer be repeated. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0026] Figure 1 A connection structure diagram of a reverse connection prevention device provided by the embodiments of the present application is shown in the figure.

[0027] Figure 2 A connection structure diagram of a reverse connection prevention system provided by the embodiments of the present application is shown in the figure.

[0028] REFERENCE NUMERALS:

[0029] 1000 - reverse connection prevention system

[0030] 100 - reverse connection prevention device; 200 - battery; 201 - positive electrode of battery; 202 - negative electrode of battery; 300 - DCDC converter; 400 - power-on switch; 401 - positive electrode of power-on switch; 402 - negative electrode of power-on switch;

[0031] 10 - positive electrode lead; 11 - first end; 12 - second end; 20 - negative electrode lead; 21 - first end; 22 - second end; 30 - on-off assembly; 31 - first controllable switch; 32 - relay; 33 - second controllable switch; 40 - reverse prevention controller; 50 - resistor. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to 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 the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0034] The terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified and limited, the meaning of "a plurality of" is two or more.

[0035] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, when describing the pipeline, the "connected" and "connected" used in the present application have the meaning of conducting. The specific meaning needs to be understood in combination with the context.

[0036] In the embodiments of the present application, the word "exemplary" or "for example" is used to mean serving as an example, instance, or illustration. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the embodied examples are presented so as to enable a clear and concise disclosure of the application.

[0037] In the description of the present application, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0038] In a first aspect, refer to Figure 1 , Figure 1 A connection structure of a reverse connection prevention device is shown, and the reverse connection prevention device 100 includes a positive lead 10, a negative lead 20, a switch assembly 30, and a reverse connection prevention controller 40.

[0039] It should be noted that the positive lead 10 and the negative lead 20 can be made of metal with good electrical conductivity, and the positive lead 10 and the negative lead 20 can be made of the same material or different materials. For example, the positive lead 10 and the negative lead 20 can be made of copper, aluminum, silver, etc., and the present application does not limit this.

[0040] The positive lead 10 includes a first end 11 and a second end 12, the first end 11 is used to connect with the positive electrode of a battery (i.e., a small battery), and the second end 12 is used to connect with the positive electrode of an external power supply to access the external power supply. The negative lead 20 includes a third end 21 and a fourth end 22, the third end 21 is used to connect with the negative electrode of the battery, and the fourth end 22 is used to connect with the negative electrode of the external power supply to access the external power supply.

[0041] In addition, at least part of the switch assembly 30 is arranged on the positive lead 10, for the convenience of description, the switch assembly 30 can be referred to the description below, and the embodiments of the present application will not be described here.

[0042] In addition, the reverse connection prevention controller 40 is connected between the positive lead 10 and the negative lead 20, the reverse connection prevention controller 40 is used to detect the polarity of the external power supply, and control the action of the switch assembly 30 according to the detection result, so as to prevent the damage of the internal devices of the vehicle caused by the reverse connection of the positive electrode and the negative electrode when the external power supply is connected. Specifically, the reverse connection prevention controller 40 is adapted to control the switch assembly 30 to be connected when the positive electrode of the external power supply is connected with the second end 12 and the negative electrode of the external power supply is connected with the fourth end 22, so as to make the positive lead 10 connected, that is, to make the first end 11 and the second end 12 of the positive lead 10 can be electrically connected.

[0043] In one possible structural design, the reverse connection prevention controller 40 can detect the polarity of the external power supply based on the unidirectional conductivity of the diode to determine whether the external power supply is connected reversely. For example, under normal power supply polarity, the diode is forward conducting, allowing current to pass through; when the power supply is connected reversely, the diode is reverse blocked, and almost no current passes through the circuit. Thus, by detecting the voltage across the diode or the current change in the circuit, it can be determined whether the external power supply is connected reversely.

[0044] In another possible structural design, the reverse connection prevention controller 40 can determine whether the external power supply is connected reversely based on the detection of the comparator. For example, the actual voltage polarity of the power supply is compared with the preset correct voltage polarity, and when the power supply is connected reversely, the actual voltage polarity is different from the preset polarity, and the comparator outputs a specific signal to indicate that the external power supply is connected reversely.

[0045] In another possible structural design, the reverse connection prevention controller 40 can also determine the polarity of the power supply based on the detection of the magnetic field direction generated by the Hall sensor, indirectly determine the direction of the current, and then determine the polarity of the power supply. For example, when the external power supply is connected reversely, the direction of the current changes, and the direction of the magnetic field detected by the Hall sensor also changes accordingly.

[0046] In this way, the reverse connection prevention device 100 detects the connection polarity of the external power supply through the reverse connection prevention controller 40, and only when the positive electrode of the external power supply is connected to the second end 12 of the positive electrode lead 10 and the negative electrode of the external power supply is connected to the fourth end 22 of the negative electrode lead 20 (i.e., the positive and negative electrodes are connected correctly), the reverse connection prevention controller 40 controls the on-off assembly 30 to be connected, and then the positive electrode lead 10 is connected, forming a complete current path. Once the positive and negative electrodes are connected reversely, the on-off assembly 30 will not be connected, and the circuit cannot form a path, thereby effectively preventing the generation of reverse current and avoiding damage to internal devices of the vehicle caused by reverse connection. In addition, the reverse connection prevention device 100 is composed of the positive electrode lead 10, the negative electrode lead 20, the on-off assembly 30, and the reverse connection prevention controller 40, which has a simple and compact structure, is easy to integrate and install.

[0047] In some embodiments of the present application, the on-off assembly 30 includes a first controllable switch 31, a relay 32, and a second controllable switch 33.

[0048] The first controllable switch 31 is electrically connected to the reverse connection prevention controller 40, and the first controllable switch 31 is adapted to receive a control signal from the reverse connection prevention controller 40 when the reverse connection prevention controller 40 detects that the positive and negative electrodes of the external power supply are correctly connected, so that the first controllable switch 31 is closed and the branch in which the first controllable switch 31 is located is connected.

[0049] In addition, the relay 32 is connected in series with the first controllable switch 31 between the positive lead 10 and the negative lead 20, and the second controllable switch 33 is arranged on the negative lead 20 and is adapted to cooperate with the contact of the relay 32 so as to be connected when the relay 32 is powered. Then, when the branch where the first controllable switch 31 is located is connected, the relay 32 is powered, and after the contact of the relay 32 is actuated, the second controllable switch 33 is connected.

[0050] Optionally, the relay 32 can be an electromagnetic relay 32, which is composed of a core, a coil, an armature, a contact spring, etc. When a certain voltage is applied to the coil, a certain current will flow in the coil, thereby generating an electromagnetic effect, and the second controllable switch 33 is closed under the action of electromagnetic attraction, and then the positive lead is connected. When the coil is powered off, the electromagnetic attraction disappears, and the second controllable switch 33 returns to the original position under the action of gravity or spring force, so that the second controllable switch 33 is disconnected.

[0051] In this way, since the first controllable switch 31 is electrically connected with the anti-reverse controller 40, the first controllable switch 31 is accurately controlled by the anti-reverse controller 40. Therefore, the anti-reverse controller 40 identifies the positive and negative polarities of the external power supply, and only when the positive and negative poles of the external power supply are correctly connected, i.e., the positive pole is connected to the second end 12 of the positive lead 10 and the negative pole is connected to the fourth end 22 of the negative lead 20, the anti-reverse controller 40 sends a conduction signal to the first controllable switch 31, and the first controllable switch 31 is turned on after receiving the signal.

[0052] Since the relay 32 is connected in series with the first controllable switch 31 between the positive lead 10 and the negative lead 20, when the first controllable switch 31 is turned on, the current passes through the relay 32, the relay 32 is powered, and after the contact of the relay 32 is actuated, the second controllable switch 33 is connected. Therefore, it is equivalent to setting double insurance for the circuit conduction, and only when both conditions (i.e., the first controllable switch 31 is turned on and the relay 32 is powered) are met, the positive lead 10 is connected, which greatly reduces the risk of failure of the anti-reverse connection function due to the failure of a certain element and enhances the reliability of the anti-reverse connection.

[0053] In some embodiments of the present application, the anti-reverse connection device 100 further comprises a resistor 50 connected between the relay 32 and the positive lead 10.

[0054] In this way, the relay 32 will generate a large inrush current at the moment of power-on due to the inductive property of its coil. The inrush current may cause damage to the relay 32 itself and other elements connected thereto (such as the first controllable switch 31, the anti-reverse controller 40, etc.). By arranging the resistor 50, the size of the current can be effectively limited to avoid excessive current impact on damaging the elements and prolong the service life of the elements.

[0055] In some embodiments of the present application, the resistance 50 is an absorption resistance 50. The absorption resistance 50 is a resistance element used in a circuit to absorb certain energy, to protect other elements, reduce interference, and improve circuit stability.

[0056] In one possible structural design, the absorption resistance 50 can be an RC absorption circuit composed of a resistance (R) and a capacitor (C) in series. In this way, when the circuit has a voltage mutation, the capacitor will quickly charge and store energy, and then gradually dissipate the stored energy through the resistance.

[0057] In another possible structural design, the absorption resistance 50 can also be an RCD absorption circuit composed of a resistance (R), a capacitor (C), and a diode (D).

[0058] In another possible structural design, the absorption resistance 50 is only composed of a resistance, which directly dissipates the energy in the circuit in the form of heat.

[0059] In this way, at the moment when the external power source is connected, the current in the circuit will quickly rise, generating an inrush current, and the absorption resistance 50 can buffer this rapidly changing current. When the current suddenly increases, the absorption resistance 50 will dissipate part of the electrical energy, limiting the rising rate of the current, and avoiding excessive inrush current from damaging the relay 32, controllable switch, and other elements.

[0060] In some embodiments of the present application, the first controllable switch 31 is a MOS tube. The MOS tube is mainly composed of a metal layer (gate G), an oxide insulating layer, and a semiconductor layer (including a source S, a drain D, and a substrate B). For example, an N-channel MOS tube is made of two highly doped N+ regions as the source and the drain on a P-type semiconductor substrate, a layer of silicon dioxide insulating layer covering the semiconductor surface between the source and the drain, and a layer of metal deposited on the insulating layer as the gate.

[0061] Since the MOS tube has extremely low on-resistance 50, when it is turned on in the reverse connection protection device 100, it can effectively reduce the power loss in the circuit. For example, in a high-current application scenario, lower on-resistance 50 means that less heat is generated on the MOS tube when transmitting the same current, improving the conversion efficiency of electrical energy, reducing energy waste, and reducing the requirement for heat dissipation devices, which helps to reduce the size and cost of the entire reverse connection protection device 100.

[0062] In some embodiments, the first controllable switch 31 is a relay. Because the relay can achieve electrical isolation between the input circuit (the control terminal, i.e., the part where the reverse connection controller 40 is connected to the relay coil) and the output circuit (the controlled terminal, i.e., the part where the relay is located), the control signal can be effectively prevented from being affected by interference from high voltage, high current, etc. in the output circuit. It also prevents faults in the output circuit from affecting the reverse connection controller 40, thus improving the stability and safety of the entire reverse connection protection device 100.

[0063] Secondly, please refer to Figure 2 , Figure 2 This illustration shows a schematic diagram of the connection structure of a reverse connection protection system 1000 provided in an embodiment of this application. The system includes a reverse connection protection device 100 and a battery 200 (also referred to as a small battery). The battery 200 includes a positive terminal 201 and a negative terminal 202. The positive terminal 201 is connected to a first terminal 11, and the negative terminal 202 is connected to a third terminal 21. The reverse connection protection device 100 is described above and will not be repeated here.

[0064] When the positive and negative terminals of the external power supply are correctly connected to the second terminal 12 and the fourth terminal 22 of the reverse connection protection device 100, the switching component 30 in the reverse connection protection device 100 is turned on under the control of the reverse connection protection controller 40, and the battery 200 can be charged or discharged normally. Once the positive and negative terminals of the external power supply are reversed, the switching component 30 will not be turned on, thereby preventing reverse current from flowing into the battery 200.

[0065] In some embodiments of this application, the reverse connection protection system 1000 further includes a DC-DC converter 300 connected between the positive terminal 201 and the negative terminal 202 of the battery.

[0066] Thus, with the DC-DC converter 300 connected between the positive terminal 201 and the negative terminal 202 of the battery, if the vehicle's battery 200 is depleted and the external power supply's positive and negative terminals are reversed, current will not be transmitted to the DC-DC converter 300, thereby preventing damage to the DC-DC converter 300 and avoiding power interruption for the entire vehicle. Furthermore, since the DC-DC converter 300 is integrated into the vehicle's electric drive or other components, its disassembly, repair, and replacement are costly and expensive. By implementing this reverse connection protection system 1000, the high repair costs resulting from damage to the DC-DC converter 300 due to reverse connection can be avoided.

[0067] In some embodiments of the present application, the reverse connection prevention system 1000 further comprises a power connection switch 400, which comprises a positive pole 401 and a negative pole 402, the positive pole 401 is connected with the second end 12, and the negative pole 402 is connected with the fourth end 22. In this way, the arrangement of the power connection switch 400 makes it simple and convenient to connect the external power supply. The user only needs to connect the positive and negative poles of the power connection wire to the positive pole 401 and the negative pole 402 of the power connection switch 400, without the need for complex operation or adjustment of the system, to realize the connection of the external power supply with the reverse connection prevention system 1000.

[0068] In a third aspect, the embodiments of the present application also provide a vehicle comprising the reverse connection prevention system 1000. Wherein the reverse connection prevention system 1000 can refer to the description of the second aspect described above, and the present application will not be described one by one.

[0069] In this way, when the vehicle is configured with the reverse connection prevention system 1000, the reverse connection prevention system 1000 detects the external power supply connection polarity through the reverse control controller 40, and only when the positive pole of the external power supply is connected with the second end 12 of the positive pole lead 10 and the negative pole is connected with the fourth end 22 of the negative pole lead 20 (i.e. the positive and negative poles are connected correctly), the reverse control controller 40 controls the on-off assembly 30 to be connected, and then the positive pole lead 10 is connected, forming a complete current path. Once the positive and negative poles are reversed, the on-off assembly 30 will not be connected, and the circuit cannot form a path, thereby effectively preventing the reverse current from being generated, and avoiding the damage of the internal devices of the vehicle caused by the reverse connection.

[0070] In understanding the scope of the present application, the term "comprising" and its derivatives, as used herein, are intended to be open-ended terms that specify the presence of the stated features, elements, components, groups, integers, and / or steps, but do not exclude the presence of other unstated features, elements, components, groups, integers and / or steps. The term "comprising" herein, also includes the terms "including", "containing", "having", and the like.

[0071] The term "attached" or "attach" as used herein includes a configuration in which an element is directly secured to another element by fixing the element to the other element, a configuration in which the element is indirectly secured to the other element by fixing the element to an intermediate member which in turn is fixed to the other element, and a configuration in which one element is integral with another element, i.e., one element is essentially a part of the other element. This definition also applies to words of similar meaning, such as "connected", "coupled", "engaged", "mounted", "bonded", "fixed", and derivatives thereof. Finally, degree terms such as "substantially", "approximately" and "about" as used herein mean an acceptable amount of deviation from the stated term so that the end result is not significantly changed.

[0072] Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The features described in one embodiment can be applied to another embodiment, unless the features are not compatible with the other embodiment or are otherwise stated to be not applicable.

[0073] The application has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and illustration, and are not intended to limit the application to the scope of the described embodiments. Furthermore, those skilled in the art can understand that the application is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the application, which all fall within the scope of the application claimed.

Claims

1. A reverse connection protection device, characterized in that, include: The positive lead (10) includes a first end (11) for connecting to the positive terminal of the battery and a second end (12) for connecting to the positive terminal of an external power source; The negative lead (20) includes a third end (21) for connecting to the negative terminal of the battery and a fourth end (22) for connecting to the negative terminal of the external power source; The switching component (30) is at least partially disposed on the positive lead (10); An anti-reverse controller (40) is connected between the positive lead (10) and the negative lead (20), and is adapted to control the switching component (30) to connect when the positive terminal of the external power supply is connected to the second terminal (12) and the negative terminal of the external power supply is connected to the fourth terminal (22), so that the positive lead (10) is connected.

2. The anti-reverse connection device according to claim 1, characterized in that, The on / off component (30) includes: The first controllable switch (31) is electrically connected to the anti-reverse controller (40); A relay (32) is connected in series with the first controllable switch (31) between the positive lead (10) and the negative lead (20); The second controllable switch (33) is disposed on the negative lead (20) and is adapted to cooperate with the contacts of the relay (32) so that the second controllable switch (33) is connected when the relay (32) is energized.

3. The anti-reverse connection device according to claim 2, characterized in that, The reverse connection protection device further includes a resistor (50) connected between the relay (32) and the positive lead (10).

4. The anti-reverse connection device according to claim 3, characterized in that, The resistor (50) is an absorption resistor.

5. The anti-reverse connection device according to any one of claims 2-4, characterized in that, The first controllable switch (31) is a MOS transistor.

6. The reverse connection protection device according to any one of claims 2-4, characterized in that, The first controllable switch (31) is a relay.

7. A reverse connection protection system, characterized in that, include: The reverse connection protection device (100) according to any one of claims 1-6; The battery (200) includes a positive electrode (201) and a negative electrode (202), wherein the positive electrode (201) is connected to the first end (11) and the negative electrode (202) is connected to the third end (21).

8. The reverse connection protection system according to claim 7, characterized in that, Also includes: A DC-DC converter (300) is connected between the positive terminal (201) and the negative terminal (202) of the battery.

9. The reverse connection protection system according to claim 7, characterized in that, Also includes: A jump-start switch (400) includes a jump-start positive terminal (401) and a jump-start negative terminal (402), wherein the jump-start positive terminal (401) is connected to the second terminal (12) and the jump-start negative terminal (402) is connected to the fourth terminal (22).

10. A vehicle, characterized in that, The reverse connection protection system (1000) includes any one of claims 7-9.

Images