Current detection assembly

Abstract

The utility model provides a current detection assembly. The current detection assembly comprises a conducting bar and a current sensor arranged on the conducting bar. Wherein the width size of the current sensor is smaller than the width size of the conducting bar, the length size of the current sensor is smaller than the length size of the conducting bar, and the thickness size of the current sensor is smaller than the thickness size of the conducting bar. According to the current detection assembly provided by the invention, the width size or the length size or the thickness size of the current sensor is smaller than the corresponding size of the conducting bar, so that compared with an existing current sensor, the size is greatly reduced, the current sensor can be conveniently installed on the conducting bar, and the power density of power electronic equipment is improved.

Description

Technical Field

[0001] The present application relates to the field of power electronics technology, and in particular to a current detection component. Background Art

[0002] In recent years, power electronic systems such as new energy vehicles, photovoltaic power generation, wind power generation, and energy storage are gradually developing towards high power, modularization, integration, and high power density, requiring the use of copper or aluminum busbars with larger cross-sectional areas. Correspondingly, traditional current sensors are also becoming larger and more expensive.

[0003] like Figure 1 As shown, the existing current sensor 11 is usually composed of an iron core, a coil, a Hall chip, an operational amplifier, etc. The current sensor 11 is sleeved on the conductive bar 12 to detect the current, that is, the conductive bar 12 passes through the hole in the middle of the current sensor 12, and the current sensor 12 is installed on the conductive bar 11 through a structural member.

[0004] The detection principle of the current sensor 11 is as follows: when current flows through the conductive bus 12, electromagnetic induction generates a magnetic field, the iron core senses the magnetic field strength, and a small voltage is induced on the Hall chip. The small voltage is amplified by the operational amplifier and fed back to the compensation coil (not shown) through the transistor. Current flows through the compensation coil, and finally the current Is is detected, and the current Ip in the conductive bus is indirectly calculated.

[0005] exist Figure 1 In the assembly shown, there is a problem that the current sensor 11 is large in size and inconvenient to install. Utility Model Content

[0006] The present application provides a current detection component to solve the problem that the current sensor in the existing current detection component is large in size and inconvenient to install.

[0007] The present application provides a current detection assembly, including a conductive bar and a current sensor disposed on the conductive bar;

[0008] The width of the current sensor is smaller than the width of the conductive bar, the length of the current sensor is smaller than the length of the conductive bar, and the thickness of the current sensor is smaller than the thickness of the conductive bar.

[0009] In one example, the current sensor includes an insulating housing and a current sensing chip disposed in the insulating housing.

[0010] In one example, the current sensor does not include a coil or a core.

[0011] In one example, the current sensor further includes a lead, one end of the lead is connected to the current sensing chip, and the other end of the lead extends out of the insulating housing.

[0012] In one example, a width dimension, a length dimension, or a thickness dimension of the current sensor is between 2 mm and 10 mm.

[0013] In one example, the conductive bar has a receiving cavity, and the current sensor is at least partially accommodated in the receiving cavity.

[0014] In one example, the accommodating cavity includes a slot disposed on the conductive bar.

[0015] In one example, the current sensor includes an insulating shell and a lug extending horizontally from the insulating shell, the insulating shell is accommodated in the accommodating cavity, and the lug is arranged on the outer surface of the conductive bar.

[0016] In one example, a cross-sectional area of ​​the insulating shell is larger than a cross-sectional area of ​​the accommodating cavity.

[0017] In one example, the current sensor is glued to the conductive bar by an adhesive material.

[0018] The current detection component provided in the present application has a greatly reduced volume compared to existing current sensors, because the width dimension, length dimension or thickness dimension of the current sensor is smaller than the corresponding dimension of the conductive bar, which is conducive to the installation of the current sensor on the conductive bar and improves the power density of the power electronic equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0020] Figure 1 It is a schematic diagram of an existing current detection component;

[0021] Figure 2 is a schematic diagram of a current detection component provided in an embodiment of the present application;

[0022] Figure 3 is a schematic diagram of a current sensor provided in an embodiment of the present application;

[0023] Figure 4 It is a physical schematic diagram of the current detection component provided in the implementation mode of the present application. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present application. The terms used in this specification in the specification of the present application are only for the purpose of describing specific embodiments and are not used to limit the present application. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0025] like Figure 2 As shown, the current detection assembly provided in the embodiment of the present application includes a conductive bar 120 and a current sensor 110 disposed on the conductive bar 120;

[0026] The width of the current sensor 110 is smaller than the width of the conductive bar 120 , the length of the current sensor 110 is smaller than the length of the conductive bar 120 , and the thickness of the current sensor 110 is smaller than the thickness of the conductive bar 120 .

[0027] In this example, the current sensor does not include a coil or a core, thereby greatly reducing the size or volume of the current sensor 110 .

[0028] In one example, a width dimension, a length dimension, or a thickness dimension of the current sensor is between 2 mm and 10 mm, or between 2 mm and 8 mm, or between 2 mm and 6 mm, or between 4 mm and 6 mm.

[0029] like Figure 3 As shown, in one example, the current sensor 110 includes an insulating housing 111, a lug 112 extending horizontally from the insulating housing 111, a current sensing chip 113 disposed in the insulating housing 111, and a lead 114 connected to the current sensing chip 113. One end of the lead 114 is connected to the current sensing chip 113, and the other end of the lead 114 extends out of the insulating housing 111 to be connected to an external device. The current sensing chip 113 can directly detect the magnetic field strength generated by the current of the conductive bar 120, thereby directly detecting and calculating the current flowing through the conductive bar 120.

[0030] In one example, the conductive bar 120 has a receiving cavity 121 , and the current sensor 110 is at least partially received in the receiving cavity 121 .

[0031] Specifically, the accommodating cavity 121 includes a slot disposed on the conductive bar 120 . The insulating housing 111 is received in the accommodating cavity 121 , and the lug 112 is disposed on an outer surface of the conductive bar 120 .

[0032] In one example, the cross-sectional area of ​​the insulating housing 111 (including the area of ​​the inner hollow part) is slightly larger than the cross-sectional area of ​​the accommodating cavity 121. In this way, the insulating housing 111 is conveniently held in the accommodating cavity 121. The shape of the insulating housing 111 includes but is not limited to a cube or a cylinder.

[0033] It should be noted that the manner in which the current sensor 110 is arranged on the conductive bar 120 is not limited to the aforementioned manner. For example, in other examples, the current sensor 110 is adhered to the conductive bar 120 by an adhesive material, which is also feasible. The adhesive material needs to be a high temperature resistant material, such as a material resistant to 200° C. or above (the specific temperature value is not limited).

[0034] Figure 4 Schematic diagram of the current detection component provided in the embodiment of the present application. Figure 4 It can be seen that relative to Figure 1 As shown in the current sensor 11, the volume of the current sensor 110 of the present application is greatly reduced (close to the volume of ordinary headphones), which is conducive to the installation of the current sensor 110 on the conductive bar 120 and improves the power density of the power electronic device.

[0035] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not used as additional limitations on the content of the present application. The purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope of the description of the present application; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the present application.

Claims

1. A current detection component, characterized in that: It includes a conductive bar and a current sensor arranged on the conductive bar; The width of the current sensor is smaller than the width of the conductive bar, the length of the current sensor is smaller than the length of the conductive bar, and the thickness of the current sensor is smaller than the thickness of the conductive bar.

2. The current detection component as claimed in claim 1, characterized in that The current sensor comprises an insulating shell and a current sensing chip arranged in the insulating shell.

3. The current detection component as claimed in claim 2, characterized in that The current sensor does not include a coil or a core.

4. The current detection component as claimed in claim 2, characterized in that The current sensor further comprises a lead wire, one end of which is connected to the current sensing chip, and the other end of which extends out of the insulating housing.

5. The current sensing component as claimed in claim 1, characterized in that: The width dimension, length dimension or thickness dimension of the current sensor is between 2 mm and 10 mm.

6. The current sensing component as claimed in claim 1, characterized in that: The conductive bar has a receiving cavity, and the current sensor is at least partially received in the receiving cavity.

7. The current sensing component as claimed in claim 6, characterized in that: The accommodating cavity includes a slot arranged on the conductive bar.

8. The current sensing component as claimed in claim 6, characterized in that: The current sensor comprises an insulating shell and a lug extending horizontally from the insulating shell. The insulating shell is accommodated in the accommodating cavity, and the lug is arranged on the outer surface of the conductive bar.

9. The current sensing component as claimed in claim 8, characterized in that: The cross-sectional area of ​​the insulating shell is larger than the cross-sectional area of ​​the accommodating cavity.

10. The current sensing component as claimed in claim 1, characterized in that: The current sensor is glued to the conductive bar by means of an adhesive material.

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