阅读说明：本技术 一种用于充电机直流回路的器件 (Device for direct current loop of charger ) 是由 刘晓民 周斌 丁晓伟 肖攀 杨延志 杜岩平 刘旭东 李洪涛 汤文广 门军 冯立艳 于 2020-06-29 设计创作，主要内容包括：本发明公开一种用于充电机直流回路的器件,包括：绝缘壳体；绝缘壳体内安装有第一静触头组件、第二静触头组件、第一输出端子、第二输出端子、第一动触头组件和第二动触头组件；第一静触头组件包括依次连接的第一输入端子、分流器和第一静触头静触点；第二静触头组件包括依次连接的第二输入端子、熔芯和第二静触头静触点；动触头组件用于控制对应的输出端子与静触头静触点之间导通或者不导通。本发明可解决现有技术中直流回路器件种类多,成本高,连接点多,回路集成度不高,可靠性差等问题,并降低接触不良导致的过热风险。同时提高电动汽车充电机稳定性,对新能源电动汽车的普及、用户的快速充电需求,起到极大的推进作用。(The invention discloses a device for a direct current loop of a charger, which comprises: an insulating housing; a first fixed contact component, a second fixed contact component, a first output terminal, a second output terminal, a first moving contact component and a second moving contact component are arranged in the insulating shell; the first fixed contact component comprises a first input terminal, a shunt and a first fixed contact which are sequentially connected; the second fixed contact component comprises a second input terminal, a fusible core and a second fixed contact which are sequentially connected; the movable contact assembly is used for controlling the conduction or non-conduction between the corresponding output terminal and the static contact of the static contact. The invention can solve the problems of various direct current loop devices, high cost, more connecting points, low loop integration level, poor reliability and the like in the prior art, and reduce the overheating risk caused by poor contact. Meanwhile, the stability of a charger of the electric automobile is improved, and the electric automobile charger plays a great role in promoting the popularization of new energy electric automobiles and the rapid charging requirements of users.)

1. A device for a direct current circuit of a charger is characterized by comprising: an insulating housing (100);

a first fixed contact assembly (10), a second fixed contact assembly (20), a first output terminal (31), a second output terminal (41), a first moving contact assembly and a second moving contact assembly are arranged in the insulating shell (100);

the first static contact assembly (10) comprises a first input terminal (11), a shunt (12) and a first static contact (13) which are connected in sequence;

the second fixed contact component (20) comprises a second input terminal (21), a fusible core (22) and a second fixed contact (23) which are connected in sequence;

the first output terminal (31) and the first static contact fixed contact (13) are arranged above the first movable contact component at intervals; the first movable contact assembly is used for controlling the conduction or non-conduction between the corresponding first output terminal (31) and the first fixed contact (13);

the second output terminal (41) and the second static contact fixed contact (23) are arranged above the second movable contact component at intervals; the second movable contact assembly is used for controlling the conduction or non-conduction between the corresponding second output terminal (41) and the second fixed contact (23).

2. The device for the direct current circuit of the charger according to claim 1, characterized in that the first input terminal (11) and the second input terminal (12) are fixedly embedded on the right side wall of the insulating casing (100) and are provided with threaded holes for wiring.

3. The device for the direct current circuit of the charger according to claim 1, characterized in that a first ceramic shell and a second ceramic shell (101) are arranged at the bottom of the left side in the insulating shell (100), and a first insulating sealing cover is arranged at the top of the first ceramic shell; a second insulating sealing cover (102) is arranged at the top of the second ceramic shell (101);

the first moving contact assembly (30) comprises a first moving contact driving device arranged in the first ceramic shell; the first output terminal and the first static contact fixed contact are positioned above the first movable contact driving device; the second movable contact assembly (40) comprises a second movable contact driving device arranged in the second ceramic shell, and the second output terminal and the second fixed contact are positioned above the second movable contact driving device;

a first fixed insulating plate (310) and a second fixed insulating plate (410) are respectively arranged above the first insulating sealing cover and the second insulating sealing cover (102) in the insulating shell (100);

the first output terminal and the static contact of the first static contact are fixed on the first fixed insulating plate (310) and the first insulating sealing cover, and the top of the first output terminal is exposed out of the first fixed insulating plate (310) for external wiring; the bottom contact end of the first output terminal extends into the first ceramic shell;

the second output terminal and the static contact of the second static contact are fixed on the second fixed insulating plate (410) and the second insulating sealing cover, and the top of the second output terminal is exposed out of the second fixed insulating plate (410) for external wiring; the bottom contact end of the second output terminal extends into the second ceramic shell.

4. The device for the direct current circuit of the charger according to claim 3, characterized in that the first moving contact driving device and the second moving contact driving device have the same structure; both comprise: the electromagnetic coil (42) of the cylindrical shape, the middle part of the electromagnetic coil (42) of the cylindrical shape has movable iron core (43); the middle part of the movable iron core (43) is provided with a movable iron core upright rod (431), and the top of the movable iron core upright rod (431) is provided with a movable contact (432).

5. The device for the direct current circuit of the charger according to claim 4, characterized in that when the cylindrical electromagnetic coil (42) is energized, the movable iron core (43) overcomes the resistance of the spring to rise, so that the movable contact (432) is in contact with the corresponding first/second output terminal and the stationary contact of the first/second stationary contact, and the three are conducted.

6. The device according to claim 4, characterized in that the space of movement of the plunger (43) is located in a vacuum environment or in an inert gas environment inside the corresponding ceramic casing.

7. The device according to claim 1, characterized in that the shunt (12) is an alloy resistor.

8. The device for the direct current circuit of the charger according to claim 1, characterized in that the top of the insulating casing (100) at both ends of the shunt (12) is provided with a small hole for measuring the voltage drop across the shunt.

Technical Field

The invention belongs to the technical field of chargers, and particularly relates to a device for a direct-current loop of a charger.

Background

The charger is used as an important service device of the electric automobile, and the direct current loop is a key loop of the charger.

Disclosure of Invention

The invention aims to provide a device for a direct current loop of a charger, and aims to solve the problems that in the prior art, direct current loop devices are various, high in cost, multiple in connection points, low in loop integration level, poor in reliability and prone to cause poor contact overheating risks.

In order to achieve the purpose, the invention adopts the following technical scheme:

a device for a charger dc circuit, comprising: an insulating housing;

a first fixed contact component, a second fixed contact component, a first output terminal, a second output terminal, a first moving contact component and a second moving contact component are arranged in the insulating shell;

the first fixed contact component comprises a first input terminal, a shunt and a first fixed contact which are sequentially connected;

the second fixed contact component comprises a second input terminal, a fusible core and a second fixed contact which are sequentially connected;

the first output terminal and the first static contact fixed contact are arranged above the first movable contact component at intervals; the first movable contact assembly is used for controlling the conduction or non-conduction between the corresponding first output terminal and the first fixed contact;

the second output terminal and the second static contact fixed contact are arranged above the second movable contact component at intervals; and the second movable contact assembly is used for controlling the conduction or non-conduction between the corresponding second output terminal and the second fixed contact.

Furthermore, the first input terminal and the second input terminal are fixedly embedded on the right side wall of the insulating shell and are provided with threaded holes for wiring.

Furthermore, a first ceramic shell and a second ceramic shell are arranged at the bottom of the left side in the insulating shell, and a first insulating sealing cover is arranged at the top of the first ceramic shell; a second insulating sealing cover is arranged at the top of the second ceramic shell;

the first moving contact component comprises a first moving contact driving device arranged in the first ceramic shell; the first output terminal and the first static contact fixed contact are positioned above the first movable contact driving device; the second moving contact component comprises a second moving contact driving device arranged in the second ceramic shell, and the second output terminal and the second static contact fixed contact are positioned above the second moving contact driving device;

a first fixed insulating plate and a second fixed insulating plate are respectively arranged above the first insulating sealing cover and the second insulating sealing cover in the insulating shell;

the first output terminal and the static contact of the first static contact are fixed on the first fixed insulating plate and the first insulating sealing cover, and the top of the first output terminal is exposed out of the first fixed insulating plate for external wiring; the bottom contact end of the first output terminal extends into the first ceramic shell;

the second output terminal and the second static contact fixed contact are fixed on the second fixed insulating plate and the second insulating sealing cover, and the top of the second output terminal is exposed out of the second fixed insulating plate for external wiring; the bottom contact end of the second output terminal extends into the second ceramic shell.

Further, the first movable contact driving device and the second movable contact driving device have the same structure; both comprise: the middle part of the cylindrical electromagnetic coil is provided with a movable iron core; the middle part of the movable iron core is provided with a movable iron core vertical rod, and the top of the movable iron core vertical rod is provided with a movable contact.

Furthermore, when the cylindrical electromagnetic coil is electrified, the movable iron core overcomes the resistance of the spring to rise, so that the movable contact is in contact with the corresponding first/second output terminal and the first/second static contact, and the conduction of the movable contact, the first output terminal and the second output terminal is realized.

Furthermore, the moving space of the movable iron core is positioned in a vacuum environment or an inert gas environment in the corresponding ceramic shell.

Further, the shunt is an alloy resistor.

Furthermore, the top of the insulating shell is provided with a small hole for measuring the voltage drop on the shunt at two ends of the shunt respectively.

Compared with the prior art, the invention has the following beneficial effects: the invention adopts a modular structure and is integrally packaged, so that the problems of multiple direct current loop devices, high cost, multiple connecting points, low loop integration level, poor reliability and the like in the prior art can be solved, and the overheating risk caused by poor contact is reduced. Meanwhile, the stability of a charger of the electric automobile is improved, and the electric automobile charger plays a great role in promoting the popularization of new energy electric automobiles and the rapid charging requirements of users.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram of a conventional dc circuit structure for a charger.

Fig. 2 is a perspective view of a novel device arrangement for a charger dc circuit according to the present invention;

fig. 3 is a top view of a novel device arrangement for a charger dc circuit according to the present invention;

fig. 4 is a right side view of a novel device arrangement for a charger dc circuit in accordance with the present invention;

fig. 5 is a front view of a novel device arrangement for a charger dc circuit according to the present invention;

fig. 6 is a left side view of a novel device arrangement for a charger dc circuit in accordance with the present invention;

fig. 7 is a top perspective view of a novel device arrangement for a charger dc circuit according to the present invention;

fig. 8 is a sectional view taken along line a-a of fig. 7.

Detailed Description

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical 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 herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.

Referring to fig. 2-8, the present invention provides a novel device for a dc circuit of a charger, which includes an insulating housing 100;

the insulating housing 100 is provided with a first fixed contact assembly 10, a second fixed contact assembly 20, a first output terminal 31, a second output terminal 41, a first movable contact assembly and a second movable contact assembly.

The first fixed contact assembly 10 comprises a first input terminal 11, a shunt 12 and a first fixed contact 13 which are connected in sequence; the second static contact component 20 comprises a second input terminal 21, a fusible core 22 and a second static contact fixed contact 23 which are connected in sequence; the first input terminal 11 and the second input terminal 12 are fixedly embedded on the right side wall of the insulating housing 100, and are provided with threaded holes for wiring.

The first output terminal 31 and the second output terminal 41 are fixed in position to form two stationary contacts; the first stationary contact 13, the second stationary contact 23, the first output terminal 31 and the second output terminal 41 are fixed together and spaced from each other.

The shunt 12 is a precision alloy resistor, the resistance value is very accurate, and the voltage drop on the shunt 12 is in a linear relation with the flowing current; the top of the insulating housing 100 at both ends of the shunt 12 is provided with a small hole for detecting the voltage drop across the shunt 12 and measuring the current.

A first ceramic shell and a second ceramic shell 101 are arranged at the bottom of the left side in the insulating shell 100, and a first insulating sealing cover is arranged at the top of the first ceramic shell; the top of the second ceramic housing 101 is provided with a second insulating sealing cover 102.

The first moving contact component comprises a first moving contact driving device arranged in the first ceramic shell; the first output terminal 31 and the first fixed contact 13 are positioned above the first moving contact driving device; the second moving contact assembly includes a second moving contact driving device disposed in the second ceramic case, and the second output terminal 41 and the second stationary contact fixed contact 23 are located above the second moving contact driving device.

A first fixed insulating plate 310 and a second fixed insulating plate 410 are respectively disposed above the first insulating sealing cap and the second insulating sealing cap 102 in the insulating case 100.

The first output terminal 31 and the first static contact stationary contact 13 are fixed on the first fixed insulating plate 310 and the first insulating sealing cover, the top of the first output terminal 31 is exposed out of the first fixed insulating plate 310 for external wiring, and the bottom contact end extends into the first ceramic shell; the second output terminal 41 and the second stationary contact 23 are fixed on the second fixed insulating plate 410 and the second insulating sealing cover, the top of the second output terminal 41 is exposed out of the second fixed insulating plate 410 for external connection, and the bottom contact end 411 extends into the second ceramic shell.

The first fixed insulating plate 310 and the second fixed insulating plate 410 are of an integrated/separated structure;

or the first insulating sealing cover and the second insulating sealing cover are of an integrated/split structure;

alternatively, the first fixed insulating plate 310, the second fixed insulating plate 410, the first insulating sealing cap, and the second insulating sealing cap are integrally formed.

The first movable contact driving device and the second movable contact driving device have the same structure; the second moving contact driving device comprises a cylindrical electromagnetic coil 42, and a moving iron core 43 is arranged in the middle of the cylindrical electromagnetic coil 42; the middle part of the movable iron core 43 is provided with a movable iron core upright rod 431, and the top of the movable iron core upright rod 431 is provided with a movable contact 432. When the cylindrical electromagnetic coil 42 is energized, the movable iron core 43 overcomes the resistance of the spring to rise, so that the movable contact 432 is contacted with the bottom contact end 411 of the second output terminal 41 and the bottom contact end 231 of the second stationary contact fixed contact 23, and the two fixed contacts are conducted through one movable contact.

The moving space of the movable iron core 43 is positioned in the vacuum environment in the second ceramic shell, so that arc extinction is facilitated.

The invention provides a novel device for a direct current loop of a charger, which has the functions of overload protection, short-circuit protection, loop current measurement and loop switching. The second stationary contact assembly 20 is a stationary contact having overload protection and short-circuit protection functions. The first stationary contact assembly 10 is a stationary contact having a loop current measuring function. The first movable contact assembly and the second movable contact assembly are movable contacts, and the circuit opening/closing function is achieved.

The second stationary contact assembly 20 is a stationary contact having overload protection and short circuit protection functions, and has a function of a fuse, one side of which is connected to an external connection and the other side of which is connected to a movable contact.

The first fixed contact assembly 10 is a fixed contact having a loop current measuring function, and can expand the current measuring range of the meter, convert the large current of the main loop into a secondary current value within the measuring range of the meter, and one side of the first fixed contact assembly is connected with an external wiring and the other side of the first fixed contact assembly is connected with a movable contact.

The first movable contact component and the second movable contact component are movable contacts of the device, the first movable contact component and the second movable contact component are connected with the electromagnet, and the position of the movable contact is controlled by controlling the power-on/power-off of the coil, so that the closing and the opening of the device are controlled.

The movable contact and part of the static contact which are composed of the first movable contact component and the second movable contact component are sealed by epoxy resin and ceramic materials, and arc extinguishing treatment is carried out in an inert gas/vacuum environment in the bin.

The technical scheme of the invention can solve the problems of various direct current loop devices, high cost, multiple connecting points, low loop integration level, poor reliability and the like in the prior art, and reduce the overheating risk caused by poor contact. Meanwhile, the stability of a charger of the electric automobile is improved, and the electric automobile charger plays a great role in promoting the popularization of new energy electric automobiles and the rapid charging requirements of users.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.