High-voltage connector with fuse and protection switch

Abstract

The utility model relates to a high-voltage connector with a fuse and a protection switch, which is used for circuit connection of an inverter of a new energy automobile and comprises a plastic-coated support, a copper bar assembly arranged on the plastic-coated support, at least one fuse and a plurality of blind hole nuts. The copper bar assembly comprises a main positive electricity copper bar, a main negative electricity copper bar, at least one positive electricity branch copper bar, a positive electricity branch copper bar connecting plate and a negative electricity branch copper bar, and the positive electricity branch copper bar connecting plate is connected with the main positive electricity copper bar in a welded mode. One end of the at least one fuse is connected with the positive electricity branch copper bar connecting plate by locking the blind hole nut through a screw, and the other end of the at least one fuse is connected with the at least one positive electricity branch copper bar by locking the blind hole nut through a screw; and the negative electricity branch copper bar is welded and connected with the main negative electricity copper bar. The integrated structure is used, the assembly space is saved, and the assembly steps are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a high pressure connector, concretely relates to a high pressure connector with a fuse and a protection switch applied to a new energy automobile inverter. BACKGROUND

[0002] With the development of science and technology, the progress of technology, automobile products change rapidly, and higher requirements are put forward for circuit connecting piece products, and automobile parts are an important field for China's automobile industry to participate in globalization. In a new energy hybrid vehicle, a high voltage connector plays a very important role. In a high voltage and high current environment, good sealing performance, reliable power distribution and conduction become the core and key of the safety of the new energy vehicle.

[0003] The working principle of the existing high voltage connector is: by connecting the terminals at both ends of the high voltage connector, the power and signal transmission in the inverter are realized, and the transmission process is usually accompanied by high temperature and high pressure environment. If the current overload or the component is damaged during the operation of the high voltage connector, it is easy to cause a fire accident if the power cannot be cut off in time.

[0004] The existing high voltage connector has the following defects in actual use:

[0005] (1) The high voltage connector is simple in design;

[0006] (2) Usually only contains circuit and plastic shell, lacks necessary safety protection measures;

[0007] (3) When current overload or component damage occurs, it cannot be protected by cutting off the power in time,

[0008] resulting in a fire accident.

[0009] Therefore, the existing high voltage connector still has room for improvement. INVENTION CONTENTS

[0010] The utility model aims at providing a high voltage connector with a fuse and a protection switch in a new energy automobile inverter, which has reliable structure, to solve the existing technical problems.

[0011] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0012] A high-voltage connector with a fuse and a protection switch is used for circuit connection of a new energy vehicle inverter, the high-voltage connector comprises a plastic-coated support, a copper bar assembly arranged on the plastic-coated support, at least one fuse and a plurality of blind hole nuts, the copper bar assembly comprises a main positive copper bar, a main negative copper bar, at least one positive branch copper bar, a positive branch copper bar connecting plate and a negative branch copper bar, the positive branch copper bar connecting plate is welded to the main positive copper bar, one end of the at least one fuse is connected to the positive branch copper bar connecting plate by locking the blind hole nut with a screw, and the other end of the at least one fuse is connected to the at least one positive branch copper bar by locking the blind hole nut with a screw; the negative branch copper bar is welded to the main negative copper bar.

[0013] The high-voltage connector with a fuse and a protection switch disclosed in the preferred embodiment of the present application further comprises an open-circuit positive copper bar, an open-circuit negative copper bar, two first capacitors and a second capacitor, the open-circuit positive copper bar is connected to the main positive copper bar through one of the first capacitors; the open-circuit negative copper bar is connected to the main negative copper bar through the other first capacitor; and the main positive copper bar is connected to the main negative copper bar through the second capacitor.

[0014] The first capacitor in the high-voltage connector with a fuse and a protection switch disclosed in the preferred embodiment of the present application is a 4.7nF capacitor.

[0015] The second capacitor in the high-voltage connector with a fuse and a protection switch disclosed in the preferred embodiment of the present application is a 1nF capacitor.

[0016] The design concept of the present application is to design a high-voltage connector with a fuse and a protection switch, adopt an integrated structure design, closely combine the circuit, the fuse and the protection switch together, form an integrated structure, and ensure the cooperative work between the components.

[0017] Due to the adoption of the above technical scheme, the high-voltage connector with a fuse and a protection switch has the following advantages and effects:

[0018] Firstly, the integrated structure is used to save assembly space and reduce assembly steps;

[0019] Secondly, the advanced fuse technology is adopted to quickly cut off the power supply and protect the power system in extreme cases;

[0020] Thirdly, the unique protection switch is added to automatically shut down the power supply during maintenance, ensuring the safety of maintenance.

[0021] Of course, any one of the specific embodiments implementing the content of the present application does not necessarily have all the above technical effects at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is high voltage connector appearance schematic diagram of the application;

[0023] Figure 2 It is high voltage connector explosion schematic diagram of the application;

[0024] Figure 3 It is fuse schematic diagram of the application;

[0025] Figure 4 It is first capacitor schematic diagram of the application;

[0026] Figure 5 It is second capacitor schematic diagram of the application. DETAILED DESCRIPTION

[0027] In order to facilitate understanding, the preferred embodiments of the utility model are described in further detail below in combination with the drawings.

[0028] Please refer to Figure 1 and Figure 2 High voltage connector appearance schematic diagram and explosion schematic diagram of the application, the high voltage connector of the application is integrally structured design, and the circuit, fuse and protection switch are closely combined together to form an integral structure, which ensures the cooperative work between the components; and advanced fuse technology is adopted to realize the rapid cutting of current in extreme conditions, protect the power system from damage; the protection switch can be automatically closed and powered off during maintenance to ensure the safety of the maintenance process; the safety performance of the high voltage connector is greatly improved, and the occurrence of dangerous conditions such as automobile fire is effectively prevented.

[0029] For example Figure 2As shown, the high-voltage connector is used for circuit connection of a new energy vehicle inverter, the vehicle-mounted inverter (power converter, power inverter) is a kind of device capable of converting DC 12V direct current into AC 220V alternating current same as the mains for general electrical appliances, and is a kind of convenient power converter for vehicle, the high-voltage connector comprises a plastic-coated support 10, a copper bar assembly arranged on the plastic-coated support 10, at least one fuse 30 and a plurality of blind hole nuts 40, the plastic-coated support 10 is connected to the copper bar assembly, and only the connection part of the copper bar assembly is exposed; the copper bar assembly comprises a main positive copper bar 21, a main negative copper bar 22, at least one positive branch copper bar 23, a positive branch copper bar connecting plate 24 and a negative branch copper bar 25, the main positive copper bar 21 and the main negative copper bar 22 are both sheet-shaped curved copper sheets, the main positive copper bar 21 and the main negative copper bar 22 exposed outside the plastic-coated support 10 are in parallel; the positive branch copper bar connecting plate 24 is welded to the main positive copper bar 21, and the positive branch copper bar connecting plate 24 is used to form a branch, in the embodiment of the application, two connecting holes are formed on the positive branch copper bar connecting plate 24, and the two connecting holes are one-to-two sheet materials, where the so-called one-to-two refers to a case that one power supply is connected to two branch power supplies at the same time.

[0030] In addition, one end of the at least one fuse 30 is connected to the positive branch copper bar connecting plate 24 by locking the blind hole nut 40 with a screw, and the other end of the at least one fuse 30 is connected to the at least one positive branch copper bar 23 by locking the blind hole nut 40 with a screw, in the embodiment of the application, the number of the fuses 30 corresponds to the number of the connecting holes of the positive branch copper bar connecting plate 24, which is two, that is, two connecting holes are formed on the positive branch copper bar connecting plate 24, and a connecting hole is also formed on the connecting end of the fuse 30, in the plastic injection process, the blind hole nut 40 is also injected in the plastic-coated support 10, the upper end of the blind hole nut 40 is fixedly connected to the connecting hole of the positive branch copper bar connecting plate 24, and in addition, the positive branch copper bar 23 connected to the connecting hole of the fuse 30 is also fixedly connected to a blind hole nut 40; the negative branch copper bar 25 is welded to the main negative copper bar 22, and the negative branch copper bar 25 is used to form a branch, in the embodiment of the application, two connecting holes are formed on the negative branch copper bar 25, and the two connecting holes are one-to-two sheet materials.

[0031] Figure 2In the embodiment of the present application, the number of the blind hole nuts 40 is eight, in addition to the above-mentioned, four of which are arranged in the four connecting holes connected with the two fuse 30, and the other four are arranged below the connecting holes of the two positive branch copper bars 23 and the two negative branch copper bars 25 exposed outside the plastic-encapsulated support 10, respectively, to facilitate the high-voltage connector to connect other components on the vehicle. The fuse 30 acts as a kind of fuse, which is a current protector, and its working principle is based on the ampere-second characteristic, that is, when the current exceeds the specified value for a period of time, the fuse melts the fuse body with its own heat, thereby breaking the circuit; this design enables the fuse to react quickly when the current in the circuit is too large, protecting electrical equipment from damage.

[0032] Please refer to Figure 2 The high-voltage connector further comprises an open-circuit positive copper bar 26, an open-circuit negative copper bar 27, two first capacitors 28 and a second capacitor 29, the open-circuit positive copper bar 26 is connected with the main positive copper bar 21 through one of the first capacitors 28; the open-circuit negative copper bar 27 is connected with the main negative copper bar 22 through the other first capacitor 28; the main positive copper bar 21 is connected with the main negative copper bar 22 through the second capacitor 29, the first capacitor 28 is a 4.7nF capacitor, and the second capacitor 29 is a 1nF capacitor. In a direct current circuit environment, the first capacitor 28 and the second capacitor 29 actually play the role of an open circuit, because the frequency of direct current is zero, which causes the first capacitor 28 and the second capacitor 29 to be unable to pass current, thereby forming a disconnected point in the circuit, the first capacitor 28 and the second capacitor 29 as passive elements for storing charge and energy, their energy storage characteristics cannot be exerted under direct current conditions, but they show a state of complete isolation from the power supply, therefore, we can regard the first capacitor 28 and the second capacitor 29 in the direct current circuit as an open circuit element, which is only used for storing charge, and will not conduct current in the circuit.

[0033] It should be noted that the use of the terms "first", "second", etc. to define parts only facilitates the differentiation of corresponding parts, and the above terms have no special meaning unless otherwise stated, therefore, they cannot be understood as limiting the scope of protection of the present application.

[0034] In the description of the present application, it is understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship is generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0035] Due to the adoption of the above technical scheme, the utility model has the following advantages and effects:

[0036] First, the present application uses an integrated structure, saves assembly space and reduces assembly steps;

[0037] Second, the present application adopts advanced fusing technology to quickly cut off the power supply to protect the power system in extreme cases;

[0038] Third, the present application increases a unique protection switch, which can automatically shut down power during maintenance to ensure safety.

[0039] Of course, any one of the specific embodiments implementing the content of the present application does not necessarily have all the above technical effects at the same time.

[0040] The above disclosure is only a preferred embodiment of the utility model, but not to limit itself, any skilled person in the art without departing from the spirit of the utility model, the equivalent changes and changes, should fall within the scope of protection of the utility model.

Claims

1. A high-voltage connector with a fuse and a protection switch for circuit connection of a new energy vehicle inverter, characterized in that, The high-voltage connector comprises a plastic-encased support, a copper bar assembly arranged on the plastic-encased support, at least one fuse, and a plurality of blind hole nuts, the copper bar assembly comprises a main positive copper bar, a main negative copper bar, at least one positive branch copper bar, a positive branch copper bar connecting plate, and a negative branch copper bar, the positive branch copper bar connecting plate is welded to the main positive copper bar, one end of the at least one fuse is connected to the positive branch copper bar connecting plate by screwing the blind hole nuts, and the other end of the at least one fuse is connected to the at least one positive branch copper bar by screwing the blind hole nuts; the negative branch copper bar is welded to the main negative copper bar.

2. A high voltage connector with a fuse and protection switch according to claim 1, characterized in that, The high-voltage connector further comprises an open-circuit positive copper bar, an open-circuit negative copper bar, two first capacitors, and a second capacitor, the open-circuit positive copper bar is connected to the main positive copper bar through one of the first capacitors; the open-circuit negative copper bar is connected to the main negative copper bar through the other first capacitor; and the main positive copper bar is connected to the main negative copper bar through the second capacitor.

3. A high voltage connector with a fuse and protection switch according to claim 2, characterized in that, The first capacitor is a 4.7nF capacitor.

4. A high voltage connector with a fuse and protection switch according to claim 2, characterized in that, The second capacitor is a 1nF capacitor.

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