Reverse connection prevention device and system and vehicle

Abstract

The utility model relates to the technical field of vehicles, in particular to a reverse connection prevention device and system and a vehicle. The cathode lead is connected to the cathode of the storage battery; and when the positive lead and the negative lead are reversely connected with the positive electrode and the negative electrode of the external power supply, the reverse connection prevention piece cuts off the current of the external power supply and connects the current to the charger. Therefore, the problem that the platform portability is poor due to the fact that an anti-reverse-connection mode in the related technology is high in cost and poor in adaptability to different vehicle types and the like is solved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to an anti-reverse connection device, system and vehicle. Background Art

[0002] When the battery of a new energy vehicle is powered, external jumpering is required. If the user is not clear about the correct jumpering direction, a large instantaneous current will be generated externally, causing damage to the motor and making the entire vehicle unable to operate normally. Therefore, it is very important to prevent the entire vehicle from back-feeding.

[0003] In the related art, CN202311700500.1 (A low-loss anti-reverse connection circuit and its anti-reverse connection control method) provides an anti-reverse connection circuit, which includes a MOS tube rectifier bridge having two input ends respectively connected to the first output end and the second output end of a DC power supply, a voltage comparison unit is connected between the MOS tube rectifier bridge and the DC power supply, the output end of the voltage comparison unit is connected to the control end of the MOS tube rectifier bridge via a driving unit, the output end of the MOS tube rectifier bridge is connected to a load, a DCDC unit is further connected between the MOS tube rectifier bridge and the load, and the DCDC unit is connected to the power supply end of the driving power supply. CN202221834053.X (vehicle intelligent power distribution box and vehicle) provides a vehicle intelligent power distribution box and a vehicle. The article mentions an intelligent power distribution box, which includes: a main power supply branch, multiple power distribution branches, a communication chip, a main control chip and a driver chip, wherein the output end of each power distribution branch is respectively connected to the corresponding load, and each power distribution branch is provided with a power distribution electronic switch; when the communication chip receives the power-on instruction, it sends the power-on instruction to the main control chip, and the main control chip drives and controls the power distribution electronic switch on the corresponding power distribution branch through the driver 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 issues an instruction to the driver chip to directly control the power distribution electronic switch to disconnect, thereby protecting the charger.

[0004] However, the methods in the related technologies have a long R&D cycle and poor platform portability, which is not conducive to platformization; at the same time, the resource loss is high and there is a lack of cost advantage. Utility Model Content

[0005] One of the purposes of the utility model is to provide an anti-reverse connection device to solve the problem that the anti-reverse connection method in the related technology in the prior art is relatively high in cost and has poor adaptability to different vehicle models, resulting in poor platform portability; the second purpose is to provide an anti-reverse connection system; the third purpose is to provide a vehicle.

[0006] In order to achieve the above purpose, the technical solution adopted in this application is as follows:

[0007] A reverse connection prevention device comprises: a positive lead connected to the positive electrode of a battery; a negative lead connected to the negative electrode of the battery; and a reverse connection prevention component arranged on the positive lead, wherein when the positive lead and the negative lead are reversely connected to the positive and negative electrodes of an external power source, the reverse connection prevention component cuts off the current of the external power source and connects it to a charger.

[0008] According to the above-mentioned technical means, the embodiment of the present application can provide protection when the positive and negative poles are connected reversely, thereby preventing damage to the motor and reducing device losses; at the same time, due to the use of anti-reverse connection components, the research and development cycle of the embodiment of the present application is short and the cost is low, and the adaptability to different vehicle models is high, which is conducive to platformization and meets the needs of actual use.

[0009] Furthermore, the reverse connection protection component is a fuse.

[0010] Furthermore, the reverse connection protection component is a diode.

[0011] Furthermore, one end of the positive lead is connected to the positive electrode jumper port, the other end of the positive lead is connected to the positive electrode of the diode, and the negative electrode of the diode is connected to the positive electrode of the battery.

[0012] According to the above-mentioned technical means, the embodiment of the present application can set a diode (i.e., an anti-reverse connection component) between the positive lead and the positive electrode of the battery, so that when the positive and negative poles are connected reversely during jump-charging, the reverse connection large current can fuse the diode, thereby preventing the large current from flowing into the motor, thereby protecting the motor and preventing the potential driving safety hazard caused by the backflow of large current that damages the motor.

[0013] Furthermore, the cathode of the diode is fixedly connected to the anode of the battery.

[0014] Furthermore, one end of the negative electrode lead is connected to the negative electrode connection port, and the other end of the negative electrode lead is connected to the negative electrode of the battery.

[0015] Furthermore, the other end of the negative electrode lead is fixedly connected to the negative electrode of the battery.

[0016] Further, the connection is fixed by bolts.

[0017] According to the above-mentioned technical means, the embodiment of the present application can fix one end of the positive lead and the negative lead to the positive and negative poles of the battery respectively, thereby avoiding redundant connection between the battery and the positive and negative leads each time it is used, while ensuring that the wiring of the positive and negative leads is correct, thereby avoiding damage to the motor that may be caused by reverse connection of the positive and negative leads, protecting the safety and service life of the battery and motor, and meeting actual use needs.

[0018] A reverse connection prevention system comprises: a storage battery and a charger, wherein the positive and negative electrodes of the storage battery and the charger are connected correspondingly; and the reverse connection prevention device as above.

[0019] A vehicle comprises the above anti-reverse connection system.

[0020] This application has at least the following advantages:

[0021] (1) The embodiment of the present application can provide protection when the positive and negative poles are connected in reverse, thereby preventing damage to the motor and reducing device loss. At the same time, due to the use of anti-reverse connection components, the development cycle of the embodiment of the present application is short and the cost is low. It has a high degree of adaptability to different vehicle models, is conducive to platformization, and meets the needs of actual use.

[0022] (2) In the embodiment of the present application, a diode (i.e., an anti-reverse connection component) can be arranged between the positive lead and the positive electrode of the battery, so that when the positive and negative electrodes are connected reversely during the jumper, the reverse connection large current can fuse the diode, thereby preventing the large current from flowing into the motor, thereby protecting the motor and preventing the potential driving safety hazard caused by the large current backflow that damages the motor;

[0023] (3) The embodiment of the present application can fix one end of the positive lead and the negative lead to the positive and negative poles of the battery respectively, thereby avoiding redundant connection between the battery and the positive and negative leads each time it is used, while ensuring that the connection of the positive and negative leads is correct, thereby avoiding damage to the motor that may be caused by reverse connection of the positive and negative leads, protecting the safety and service life of the battery and the motor, and meeting actual use needs.

[0024] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the electrical connection of a vehicle of the related technology;

[0026] Figure 2 A schematic diagram of adding an anti-reverse connection device inside a charger in the related technology;

[0027] Figure 3 A schematic diagram of a connection device for an intelligent power distribution box at the vehicle end of the related technology;

[0028] Figure 4 A schematic diagram of the anti-reverse connection device of the present application;

[0029] Figure 5 This is an example diagram of an anti-reverse connection device according to an embodiment of the present application;

[0030] Figure 6 Schematic diagram of the reverse connection protection system of the present application. DETAILED DESCRIPTION

[0031] The following will describe the implementation methods of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, not for limiting the scope of protection of the present application.

[0032] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application, and thus the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0033] In the daily use of new energy vehicles, it is inevitable that the small battery needs to be fed, and the whole vehicle needs to be restarted through external jumpering. However, there are users who are not clear about the correct jumpering method, which leads to the external power supply being connected in reverse. In this case, a large instantaneous feedback current will be generated, and the large current will be reversed into the DCDC module of the charger, causing damage to the charger and making it impossible to charge the small battery, which will cause the whole vehicle to break down, bringing serious consequences.

[0034] In the related art, a method of adding an anti-reverse connection circuit to the DCDC module of the charger can be used, and a method of adding an external intelligent distribution box between the battery and the DCDC module can also be used. These two methods are suitable for new energy vehicles to prevent small batteries from being connected reversely. However, these two methods will greatly increase the space and cost of the entire vehicle, which is not economical.

[0035] For example, Figure 1 The following is a schematic diagram of the electrical connection of the whole vehicle: Figure 1 As shown, after the battery is powered, the positive and negative terminals of the battery are directly connected to the external power supply for connection; Figure 2 , Figure 3 There are two different ways to prevent reverse mounting, among which, Figure 2 This is a schematic diagram of adding an anti-reverse connection device inside the charger. Figure 3 The figure is a schematic diagram of the intelligent power distribution box connection device solution at the vehicle end; the above two methods are relatively costly and difficult to promote on a platform; its composition includes a plastic box with a fixed positive port, a fuse / diode, and a 2-terminal wire.

[0036] In response to the above problems, the embodiments of the present application propose an anti-reverse connection device, system and vehicle, which can only allow jumpering through an external blacksmith wire when the external jumper is connected. When an instantaneous large current is generated when the external jumper is reversed, the fuse in the fuse box will be blown first, so that the large current during reverse connection cannot be reversed to the charger, thereby protecting the charger.

[0037] The anti-reverse connection device, system and vehicle according to the embodiments of the present application are described below with reference to the accompanying drawings.

[0038] Figure 4 It is a block diagram of an anti-reverse connection device according to an embodiment of the present application.

[0039] like Figure 4 As shown, the reverse connection prevention device 10 includes: a positive electrode lead 110 , a negative electrode lead 120 and a reverse connection prevention component 130 .

[0040] Among them, the positive lead 110 is connected to the positive pole of the battery 210; the negative lead 120 is connected to the negative pole of the battery 210; the reverse connection protection component 130 is arranged on the positive lead, wherein, when the positive lead 110 and the negative lead 120 are reversely connected with the positive and negative poles of the external power source, the reverse connection protection component 130 cuts off the current of the external power source and connects it to the charger 220.

[0041] It can be understood that the embodiment of the present application can use an anti-reverse connection device, which can add a special jumper lead between the charger 220 and the battery 210, which is led out from the positive and negative poles of the battery 210 respectively, and at the same time use an anti-reverse connection component 130, so that jumpering can only be performed when the positive and negative jumper ports are connected accordingly. When the positive and negative poles are connected reversely, the current access of the external jumper power supply is cut off; thus, the embodiment of the present application can provide protection when the positive and negative jumper ports are connected reversely, prevent motor damage, and reduce device consumption; at the same time, the embodiment of the present application has a short R&D cycle and low cost, and is highly adaptable to different vehicle models, which is conducive to platformization and meets actual use needs; an anti-reverse connection example of an embodiment of the present application can be as follows Figure 5 shown.

[0042] In the embodiment of the present application, the reverse connection prevention element 130 is a fuse.

[0043] In the embodiment of the present application, the reverse connection protection element 130 is a diode.

[0044] It can be understood that the anti-reverse connection component 130 of the embodiment of the present application can be at least one of a fuse or a diode. Both the fuse and the diode can be blown when the external connection is reversed, so that a large current cannot be reversed during reverse connection, thereby achieving the purpose of protecting the motor and meeting the actual use needs; in the following embodiments, the anti-reverse connection component is specifically described as a diode:

[0045] Specifically, one end of the positive lead 110 is connected to the positive electrode connection port, the other end of the positive lead 110 is connected to the positive electrode of the diode, and the negative electrode of the diode is connected to the positive electrode of the battery 210;

[0046] It can be understood that the diode in the embodiment of the present application is connected to the positive lead 110, wherein one end of the positive lead 110 is connected to the positive jumper port, and the other end is connected to the positive electrode of the diode, and the negative electrode of the diode is connected to the positive electrode of the battery 210; that is, the embodiment of the present application is provided with a diode on the positive lead 110. Since a large reverse current will be generated between the positive electrode of the battery 210 and the motor 220 when the jumper is connected in reverse, a unidirectional conducting diode is provided on the positive lead 110 as an anti-reverse connection component. The large current can melt the diode in a very short time, so that the generated large current cannot flow into the motor, thereby protecting the motor and preventing the safety hazard caused by the backflow of large current and damage to the motor.

[0047] In the embodiment of the present application, the cathode of the diode is fixedly connected to the anode of the battery 220 ; the other end of the cathode lead 120 is fixedly connected to the cathode of the battery 220 .

[0048] Among them, the embodiments of the present application can be fixedly connected by bolts.

[0049] It is understandable that the embodiment of the present application can also fix the positive lead 110 to the positive electrode of the battery 210 by bolts (that is, fix the negative electrode of the diode to the positive electrode of the battery 220), and fix the end of the negative lead 120 that is not connected to the negative electrode jumper port to the battery 220, thereby avoiding redundant connection between the battery and the positive and negative leads each time it is used, and further avoiding damage to the motor that may be caused by reverse connection of the positive and negative leads, thereby protecting the safety and service life of the battery and motor and meeting actual use needs.

[0050] According to the anti-reverse connection device proposed in the embodiment of the present application, protection can be provided when the positive and negative poles are connected reversely, thereby preventing damage to the motor, reducing device losses, and further preventing driving safety hazards caused by motor damage due to backflow of large currents. At the same time, due to the use of anti-reverse connection components, the research and development cycle of the embodiment of the present application is short and the cost is low, and the adaptability to different vehicle models is high, which is conducive to platformization and meets the needs of actual use.

[0051] Next, the anti-reverse connection system proposed according to the embodiment of the present application is described with reference to the accompanying drawings.

[0052] Figure 6 It is a block diagram of the anti-reverse connection system of an embodiment of the present application.

[0053] like Figure 6 As shown, the reverse connection prevention system 20 includes: a battery 210, a charger 220 and the reverse connection prevention device 10 as described above.

[0054] It should be noted that the above explanation of the embodiment of the anti-reverse connection device is also applicable to the anti-reverse connection system of this embodiment, and will not be repeated here.

[0055] The anti-reverse connection system proposed in the embodiment of the present application can provide protection when the positive and negative poles are connected reversely, thereby preventing damage to the motor, reducing device losses, and further preventing driving safety hazards caused by motor damage due to backflow of large currents. At the same time, due to the use of anti-reverse connection components, the research and development cycle of the embodiment of the present application is short and the cost is low, and the adaptability to different vehicle models is high, which is conducive to platformization and meets the needs of actual use.

[0056] An embodiment of the present application also provides a vehicle, comprising the above anti-reverse connection system.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0059] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A reverse connection prevention device, characterized in that: include: A positive electrode lead (110) connected to the positive electrode of the battery (210); A negative electrode lead (120) connected to the negative electrode of the battery (210); An anti-reverse connection component (130) is arranged on the positive lead (110), wherein when the positive lead (110) and the negative lead (120) are connected to the positive and negative poles of an external power source in reverse connection, the anti-reverse connection component (130) cuts off the current of the external power source and connects it to the charger (220).

2. The anti-reverse connection device according to claim 1, characterized in that: The anti-reverse connection component (130) is a fuse.

3. The anti-reverse connection device according to claim 1, characterized in that: The anti-reverse connection component (130) is a diode.

4. The anti-reverse connection device according to claim 3, characterized in that: One end of the positive lead (110) is connected to a positive electrode connection port, the other end of the positive lead (110) is connected to the positive electrode of the diode, and the negative electrode of the diode is connected to the positive electrode of the battery (210).

5. The anti-reverse connection device according to claim 4, characterized in that: The cathode of the diode is fixedly connected to the anode of the battery (210).

6. The anti-reverse connection device according to claim 1, characterized in that: One end of the negative electrode lead (120) is connected to a negative electrode connection port, and the other end of the negative electrode lead (120) is connected to the negative electrode of the storage battery (210).

7. The anti-reverse connection device according to claim 6, characterized in that: The other end of the negative electrode lead (120) is fixedly connected to the negative electrode of the battery (210).

8. The anti-reverse connection device according to claim 5 or 6, characterized in that: The connection is fixed by bolts.

9. A reverse connection prevention system, characterized in that: include: A storage battery (210) and a charger (220), wherein the positive and negative electrodes of the storage battery (210) and the charger (220) are connected correspondingly; The anti-reverse connection device according to any one of claims 1 to 8.

10. A vehicle, characterized in that: Includes the anti-reverse connection system as described in claim 9.

Images