CN219418633U - Resistor and power supply device for detecting current - Google Patents
Resistor and power supply device for detecting current Download PDFInfo
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- CN219418633U CN219418633U CN202223439529.2U CN202223439529U CN219418633U CN 219418633 U CN219418633 U CN 219418633U CN 202223439529 U CN202223439529 U CN 202223439529U CN 219418633 U CN219418633 U CN 219418633U
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Abstract
The application provides a resistor and a power supply device for detecting a current. The resistor includes: the intermediate part and connect in the first tip and the second tip of intermediate part both sides, first tip and second tip are used for being connected with current input and current output, when circular telegram, the electric current is from current input through intermediate part flow to the current output, wherein, the intermediate part includes: a middle portion body through which current flows when energized and a first dead zone near the first end portion and a second dead zone near the second end portion through which current does not substantially flow, a test path between the first dead zone and the second dead zone passing through the middle portion body when the first dead zone and the second dead zone are connected to a test device. The resistor according to the embodiment of the utility model reduces the influence of the position of the test contact on the resistance and improves the test precision.
Description
Technical Field
The present utility model relates to an electronic device, and more particularly, to a resistor for detecting a current in a power supply device.
Background
For a power supply device of an electric vehicle, it is necessary to measure the current between batteries for battery management. A resistor arrangement for making such measurements is connected between two cells of a power supply arrangement, the resistor comprising copper plates on both sides and a middle resistive alloy (e.g. Cu84Ni4Mn 12). The intermediate resistive alloy has a small rate of change of resistance with temperature, and therefore, by measuring the voltage drop across the intermediate resistive alloy, the current can be accurately measured with substantially little effect from ambient temperature. In conventional arrangements, the voltage drop across the intermediate resistive alloy is typically tested by selecting contact wires on both copper plates, but deviations in contact position may cause differences in resistance between the two contacts, affecting measurement accuracy.
Disclosure of Invention
The object of the present application is to solve or at least alleviate the problems of the prior art.
In one aspect, there is provided a resistor for detecting a current, comprising: a middle portion and first and second ends connected to both sides of the middle portion, each of the middle portion and the first and second ends being made of a conductive material, the middle portion being made of a material different from that of the first and second ends, wherein the first and second ends are adapted to be connected to a current input terminal and a current output terminal, and when energized, current flows from the current input terminal through the middle portion to the current output terminal, wherein the middle portion comprises: a middle portion body through which current flows when energized and a first dead zone near the first end portion and a second dead zone near the second end portion through which current does not substantially flow, a test path between the first dead zone and the second dead zone passing through the middle portion body when the first dead zone and the second dead zone are connected to a test device.
Optionally, in an embodiment of the resistor for detecting a current, the first dead zone and the second dead zone are first protrusions and second protrusions extending from the middle portion body in a direction transverse to a current flow direction.
Optionally, in an embodiment of the resistor for detecting a current, the first protrusion and the second protrusion comprise portions extending towards each other.
Optionally, in an embodiment of the resistor for detecting a current, portions of the first end portion and the second end portion are not provided outside the first protruding portion and the second protruding portion in a current flowing direction.
Optionally, in an embodiment of the resistor for detecting a current, in a current flow direction, portions of the first and second protruding portions having the first and second end portions are outside the first and second protruding portions,
wherein the first and second protrusions are connected to portions of the first and second ends on the outside thereof, and the portions of the first and second ends have slots in the lateral direction; or alternatively
The first and second tab outsides are spaced apart from portions of the first and second ends by a slot in a lateral direction.
Optionally, in an embodiment of the resistor for detecting a current, the intermediate portion comprises at least one notch, the first dead zone and the second dead zone being separated by the at least one notch.
Optionally, in an embodiment of the resistor for detecting a current, the first dead zone is a first island surrounded by a first notch, and the second dead zone is a second island surrounded by a second notch.
Optionally, in an embodiment of the resistor for detecting current, the first notch and the second notch each include a first end, a second end and an intermediate section connected between the first end and the second end;
wherein the intermediate portion and the first and second end portions have opposite resistance trends with temperature, the first and second ends of the first and second notches extending to a seam between the intermediate portion and the first or second end portions, and the first and second end portions having an extension that engages the first and second notches; or alternatively
The intermediate portion has the same tendency to change resistance with temperature as the first and second ends, and the first and second ends of the first and second notches extend to terminate at a location proximate to or at the seam.
Optionally, in an embodiment of the resistor for detecting a current, a rate of change of resistance of the intermediate portion with temperature is lower than the first end portion and the second end portion.
There is also provided a power supply apparatus in which the resistor for detecting a current according to the respective embodiments is provided in a main flow path.
The resistor according to the embodiment of the utility model reduces the influence of the position of the test contact on the resistance and improves the test precision.
Drawings
The disclosure of the present application will become more readily understood with reference to the accompanying drawings. As will be readily appreciated by those skilled in the art: these drawings are for illustrative purposes only and are not intended to limit the scope of the present application. Moreover, like numerals in the figures are used to designate like parts, wherein:
FIG. 1 shows a schematic diagram of a resistor for detecting current according to one embodiment of the utility model; and
fig. 2 to 12 show schematic diagrams of resistors for detecting current according to other embodiments of the present utility model.
Detailed Description
The present utility model provides a resistor for detecting a current, comprising: the middle part 2 and the first end part 1 and the second end part 3 connected on both sides of the middle part 2 are made of conductor materials, and the middle part 2 is made of a material different from the first end part 1 and the second end part 3. In some embodiments, the first end portion 1 and the second end portion 3 may be made of the same material, such as copper, and the intermediate portion 2 may be made of a material having a lower rate of change of electrical resistance with temperature than the first end portion 1 and the second end portion 3, such as a copper alloy material, such as Cu84Ni4Mn12 or other alloys having similar properties, or a suitable material. In the embodiment shown, the first end 1 and the second end 3 are connected to opposite sides of the intermediate portion 2, respectively, for example the intermediate portion 2 may be rectangular, while the first end 1 and the second end 3 are connected to opposite sides of the intermediate portion 2. The first end portion 1 and the second end portion 3 are adapted to be connected to a current input terminal and a current output terminal, e.g. the first end portion 1 and the second end portion 3 comprise a first contact and a second contact, and when energized, a current i flows from the current input terminal to the current output terminal via the intermediate portion 2. For example, the first contact and the second contact are respectively connected with two batteries or battery packs of the electric power source of the electric vehicle, and the connection contacts thereof may be disposed at any positions of the first end portion 1 and the second end portion 3. According to the utility model, the intermediate portion 2 comprises: the intermediate part body 20 through which the current i flows and the first dead zone near the first end part 1 and the second dead zone near the second end part 3 through which the current does not substantially flow are provided with a first test contact and a second test contact, and the current path R of the first dead zone and the second dead zone passes through the intermediate part body 20 when the first test contact and the second test contact are connected to the test device. One design idea of the resistor according to the utility model is to form two dead zones in the intermediate part 2, through which the conduction current does not substantially pass, so that the sensitivity to the position of the contact point is reduced when the current is tested through these two dead zones, thereby enabling the resistor to measure the current more accurately.
More specifically, in the embodiment of fig. 1 to 7, the first dead zone and the second dead zone are the first protrusion 21 and the second protrusion 22 extending from the side of the middle portion main body 20 in the direction transverse to the current flow direction. The first and second protrusions 21 and 22 may extend to the same side along the vicinity of the seam of the intermediate portion body 20 and the first and second end portions 1 and 3, respectively. Alternatively, the first and second protrusions 21, 22 may further comprise portions 210,220 extending towards each other, thereby forming the shape shown in fig. 3-7. When the first end 1 and the second end 3 are connected to the corresponding circuit, the current flows through the intermediate portion 20 substantially as i in fig. 1 without flowing through the first dead zone and the second dead zone, i.e. the first protrusion 21 and the second protrusion 22, the measuring path R of which will pass through the intermediate portion body 20 when the first protrusion 21 and the second protrusion 22 are connected to the measuring means, whereas the voltage drop corresponding to the current i is determined when the shape of the intermediate portion is determined, substantially without being influenced by the actual contact positions on the first protrusion 21 and the second protrusion 22, whereby a more accurate measurement of the current is achieved.
In the embodiment of fig. 1, the first projection 21 and the second projection 22 extend from the intermediate portion 2 in the lateral direction. In the embodiment of fig. 2, the first protruding portion 21 and the second protruding portion 22 are provided outside with the first end portion 10 and the second end portion 30 in the current flow direction (left-right direction in the drawing). With continued reference to fig. 3, wherein the first and second protrusions 21, 22 further comprise portions 210,220 extending towards each other, the first and second test contacts may be provided at this extending portions 210,220, thereby further reducing the sensitivity to contact positions. With continued reference to fig. 4, which differs from the embodiment of fig. 3 in that the outer sides of the first and second protrusions 21, 22 are spaced from the first and second end portions 10,30 by a slot 41 in the transverse direction. By the provision of the slot 41, the current will be further suppressed from passing through the first projection 21 and the second projection 22. Referring to fig. 5, in an alternative embodiment, similar functionality may be similarly achieved by providing slots 41 within the first and second end portions 10,30 outside of the first and second dead zones 21, 22. In some embodiments, as shown in fig. 6, the first and second protrusions 21 and 22 are not provided with portions of the first and second ends outside, or alternatively, as shown in fig. 7, only a small portion of the first and second end portions 10,30 outside the first and second protrusions 21 and 22, which also serves to further suppress the current flowing through the first and second dead zones 21 and 22.
With continued reference to fig. 8-12, in these embodiments, the first and second dead zones are implemented by forming at least one notch 23 in the intermediate portion 2 to space the first and second dead zones apart. For example, referring to the embodiment of fig. 8, the first dead zone 21 'and the second dead zone 22' are separated by a notch 23. In an alternative embodiment, the first 21 'and second 22' dead zones are each surrounded by a slot, for example as shown in fig. 9-12. In the embodiment shown in fig. 9, two sides of one "i-shaped" notch 23 surround the first dead zone and the second dead zone, respectively, and as shown in fig. 10 to 12, the middle portion includes a first island portion 21 'partially surrounded by a first notch 231 and a second island portion 22' partially surrounded by a second notch 232, the first island portion 21 'and the second island portion 22' constituting the first dead zone and the second dead zone. In some embodiments, the first slot 231 and the second slot 232 each include a first end, a second end, and an intermediate section connected between the first end and the second end. In the embodiment shown in fig. 10, the first and second ends of the first and second notches 231, 232 terminate in the intermediate portion and the first and second end seams 11,31, in the illustration shown in fig. 11, the first and second ends of the first and second notches 231, 232 terminate in a position proximate to the seams 11,31, in the embodiment shown in fig. 12, the first and second ends of the first and second notches 231, 232 extend to the seams 11,31, and the first and second end portions have an extension that engages the first and second notches, i.e., the notches extend to the first and second end portions. In some embodiments, the first and second notches may be formed as semi-rectangular as shown, alternatively they may be formed as semi-circular or semi-elliptical or other suitable shapes. In some embodiments, where the intermediate portion and the first and second end portions have opposite temperature-dependent trends in resistance, for example where the resistance of the material of the intermediate portion decreases with increasing temperature and the resistance of the material of both sides increases with increasing temperature, then the first and second ends of the first and second notches extend to the seam as shown in fig. 10 and 12, and the first and second end portions may have extensions that engage the first and second notches such that the test path R as shown in fig. 12 includes a material consisting primarily of the intermediate portion and including a portion of the first and second end portions, thereby counteracting the effects of the two such that the overall resistance is minimized over temperature. In an alternative embodiment, the resistance is the same as the first and second ends in the middle portion, which extend to terminate at the joint 11,31 or at a position close to said joint 11,31, with the temperature change trend.
There is also provided a power supply apparatus in which the resistor for detecting a current according to the respective embodiments is provided in a main flow path.
The specific embodiments of the present application have been described above merely to provide a more clear description of the principles of the present application, in which individual components are explicitly shown or described so as to provide a more readily understood principles of the present utility model. Various modifications or variations of this application may be readily made by those skilled in the art without departing from the scope of this application. It is to be understood that such modifications and variations are intended to be included within the scope of the present application.
Claims (10)
1. A resistor for detecting current, comprising: -a middle part (2) and first and second end parts (1, 3) connected to both sides of the middle part, the middle part (2) and the first and second end parts (1, 3) being made of a conductive material, the middle part (2) being made of a different material than the first and second end parts (1, 3), characterized in that the first and second end parts (1, 3) are adapted to be connected to a current input and a current output, when energized, a current (i) flows from the current input through the middle part (2) to the current output, wherein the middle part (2) comprises: a middle part body (20) through which current flows when energized and a first dead zone near the first end (1) and a second dead zone near the second end (3) through which current (i) does not substantially flow, a test path (R) between the first dead zone and the second dead zone passing through the middle part body (20) when the first dead zone and the second dead zone are connected to a test device.
2. The resistor for detecting a current according to claim 1, characterized in that the first dead zone and the second dead zone are a first protrusion (21) and a second protrusion (22) extending from the middle part body in a direction transverse to the current flow direction.
3. The resistor for detecting a current according to claim 2, characterized in that the first protrusion (21) and the second protrusion (22) comprise portions (210, 220) extending towards each other.
4. A resistor for detecting a current according to claim 3, characterized in that the outer sides of the first and second protruding portions (21, 22) are not provided with parts of the first and second end portions in the current flow direction.
5. A resistor for detecting a current according to claim 3, characterized in that, in the current flow direction, the first (21) and the second (22) protruding parts (10, 30) have the first and second end parts outside,
wherein the first and second protrusions (21, 22) are connected externally to the first and second end portions (10, 30) and the first and second end portions have a slot (41) in the transverse direction; or alternatively
The first (21) and second (22) projections are spaced apart from the first and second end portions (10, 30) by a slot (41) in the transverse direction.
6. The resistor for detecting a current according to claim 1, characterized in that the intermediate portion comprises at least one notch (23), the first dead zone and the second dead zone being separated by the at least one notch (23).
7. The resistor for detecting a current according to claim 1, characterized in that the first dead zone is a first island (21 ') surrounded by a first notch (231) and the second dead zone is a second island (22') surrounded by a second notch (232).
8. The resistor for detecting a current according to claim 7, characterized in that the first notch (231) and the second notch (232) each comprise a first end, a second end and an intermediate section connected between the first end and the second end;
wherein the intermediate portion (2) has an opposite trend of resistance with temperature from the first (1) and second (3) ends, the first and second ends of the first and second slots (231, 232) extending to a seam (13, 33) between the intermediate portion and the first or second ends, and the first and second ends having an extension that engages the first and second slots; or alternatively
The intermediate portion (2) and the first and second end portions (1, 3) have the same resistance trend with temperature, and the first and second ends of the first and second notches (231, 232) extend to terminate at a position close to the joint (13, 33) or the joint (13, 33).
9. A resistor for detecting a current according to claim 1, characterized in that the rate of change of the resistance of the intermediate portion (2) with temperature is lower than the first end portion (1) and the second end portion (3).
10. A power supply device characterized in that a resistor for detecting a current as claimed in any one of claims 1-9 is provided in a main flow path of the power supply device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223439529.2U CN219418633U (en) | 2022-12-22 | 2022-12-22 | Resistor and power supply device for detecting current |
| DE102023211314.7A DE102023211314A1 (en) | 2022-12-22 | 2023-11-14 | CURRENT SENSING RESISTOR AND POWER SUPPLY UNIT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223439529.2U CN219418633U (en) | 2022-12-22 | 2022-12-22 | Resistor and power supply device for detecting current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219418633U true CN219418633U (en) | 2023-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223439529.2U Active CN219418633U (en) | 2022-12-22 | 2022-12-22 | Resistor and power supply device for detecting current |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN219418633U (en) |
| DE (1) | DE102023211314A1 (en) |
-
2022
- 2022-12-22 CN CN202223439529.2U patent/CN219418633U/en active Active
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2023
- 2023-11-14 DE DE102023211314.7A patent/DE102023211314A1/en active Pending
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| Publication number | Publication date |
|---|---|
| DE102023211314A1 (en) | 2024-06-27 |
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