Diverter module with high-precision function and safe design

Abstract

The utility model discloses a shunt module with high-precision function and safe design. The shunt module comprises a copper bar and a plurality of acquisition boards. The copper bar is connected with a plurality of alloy resistors and is provided with two groups of fixing holes; the plurality of acquisition plates respectively correspond to the plurality of alloy resistors, a plurality of pairs of connection bonding pads and a plurality of pairs of acquisition points are arranged on one side, close to the alloy resistors, of each acquisition plate, the connection bonding pads correspond to the acquisition points one by one, the acquisition plates are in contact with the copper bars through the connection bonding pads, and each pair of acquisition points are symmetrically arranged on two sides of the alloy resistors; the surface of the acquisition board is provided with a wiring port. According to the utility model, a multi-point acquisition mode is adopted, equalization resistors or matching resistors are additionally arranged in each acquisition circuit, the influence of current heterogeneity can be compensated together, detection values of each path can be averaged, the measurement precision can be further improved, a connection mode of two alloy resistors is disclosed, and when a single-point function fails, the single-point function can be changed into the single-point function, and the single-point function can be changed into the single-point function. And other multiple points can meet functional requirements.

Description

Technical Field

[0001] This utility model belongs to the field of shunt technology, specifically relating to a shunt module with high-precision functional safety design. Background Technology

[0002] There are several principles and methods for current detection, mainly including shunt detection and magnetic field detection. A shunt is a precision alloy resistor with a low, fixed resistance. When a direct current flows through the shunt, a voltage is generated across its terminals. This voltage can be measured with a voltmeter. Based on Ohm's law—voltage equals current multiplied by resistance—the current flowing in the circuit can be calculated.

[0003] The structure of commercially available shunts generally consists of a current-conducting area made up of two copper busbars and a resistive area made up of an alloy resistor, such as... Figure 1 As shown. However, due to the influence of non-uniform current, limitations of single-point acquisition, and electromagnetic induction effects from layout routing or cable connections, such as... Figure 2 As shown, this can lead to errors in current detection, which in turn affects the accuracy of data acquisition. In addition, since the shunt has only one alloy resistor area, one acquisition board, one set of acquisition points, one acquisition interface, and one set of mounting holes, when an abnormality occurs in a certain area, it can cause the entire product to malfunction, ultimately affecting the stability and safety of the whole machine.

[0004] Therefore, to address the aforementioned technical issues, it is necessary to provide a shunt module with a high-precision functional safety design.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this utility model is to provide a shunt module with a high-precision functional safety design, which can solve the problems in the background art mentioned above.

[0007] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows:

[0008] A shunt module with high-precision functional safety design includes: copper busbars and several acquisition boards;

[0009] Several alloy resistors are connected to the copper busbar, and two sets of fixing holes are provided on the copper busbar;

[0010] A plurality of the collection plates correspond to a plurality of the alloy resistors, one side of the collection plate close to the alloy resistor is provided with a plurality of pairs of connection pads and a plurality of pairs of collection points, the connection pad and the collection point one-to-one correspond, the collection plate is in contact with the copper bar through the connection pad, each pair of the collection points is symmetrically provided on both sides of the alloy resistor, the surface of the collection plate is provided with a wiring port, each pair of the collection points is electrically connected with the wiring port, and a temperature collection assembly is further installed on the collection plate and electrically connected with the wiring port.

[0011] In one or more embodiments of the utility model, the number of alloy resistors is 2, when single-point function fails, other multi-point can meet the functional requirements.

[0012] In one or more embodiments of the utility model, the distance between the connection pad and the alloy resistor is less than 1mm, which is used to ensure the measurement accuracy.

[0013] In one or more embodiments of the utility model, the temperature collection assembly is a thermistor or a temperature sensor or a platinum resistance, which is used to monitor the surface temperature of the copper bar on both sides of the alloy resistor.

[0014] In one or more embodiments of the utility model, the number of collection points is 4 pairs or 6 pairs or 8 pairs, the multi-point detection mode is adopted, the detection error can be reduced, and the detection accuracy can be improved.

[0015] In one or more embodiments of the utility model, each pair of the collection points forms a collection circuit, and an equalizing resistor or a matching resistor is electrically connected to the collection circuit, which is used to compensate the influence of current non-uniformity, and the detection values of each channel can be averaged, and the measurement accuracy can be improved.

[0016] In one or more embodiments of the utility model, the middle part of the collection plate is a heat conduction area, the heat conduction area is provided with a plurality of heat conduction contacts, the heat conduction contacts are in contact with the fixing holes, the surface temperature of the alloy resistor is introduced to the temperature collection assembly through the heat conduction contacts of the heat conduction area and the copper foil, and the temperature detection accuracy is improved.

[0017] In one or more embodiments of the utility model, the surface of the collection plate is provided with a copper foil, the heat conduction contacts are in contact with the copper foil, and the temperature collection assembly is in contact with the copper foil, the copper foil is used for transmitting the surface temperature of the fixing hole, and the detection accuracy of the surface temperature of the alloy resistor can be improved.

[0018] In one or more embodiments of the utility model, one pair of the alloy resistors is connected in series on the copper bar, when one of the wiring ports fails, the other wiring port can meet the functional requirements, so as to adapt to different use requirements.

[0019] In one or more embodiments of the utility model, a pair of alloy resistances are connected in parallel on the copper bar, when one of the connection ports fails, the other connection port can meet the functional requirements, so as to adapt to different use requirements.

[0020] Compared with the prior art, the shunt module with high-precision function safety design has the following advantages:

[0021] (1) The multi-point collection mode is adopted, the equalizing resistance or the matching resistance is added in each collection circuit, the influence of the non-uniformity of the current can be collectively compensated, meanwhile, the detection values of the multiple channels can be averaged, and then the measurement precision can be improved;

[0022] (2) Two kinds of connection modes of alloy resistances are disclosed, when the single-point function fails, other multiple points can meet the functional requirements. DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments in the utility model, and for those skilled in the art, other drawings can be obtained according to the drawings without creating labor.

[0024] Figure 1 It is a shunt structure schematic view in the prior art;

[0025] Figure 2 It is a disadvantage schematic view of the shunt in the prior art;

[0026] Figure 3 It is a series connection structure schematic view of the shunt module with high-precision function safety design in one embodiment of the utility model;

[0027] Figure 4 It is a parallel connection structure schematic view of the shunt module with high-precision function safety design in one embodiment of the utility model;

[0028] Figure 5 It is a collection board circuit diagram in one embodiment of the utility model;

[0029] Figure 6 It is a collection board signal wiring schematic view in one embodiment of the utility model.

[0030] MAIN DRAWING MARK EXPLANATION:

[0031] 1-copper bar, 101-alloy resistance, 102-fixing hole, 2-collection board, 201-connection port, 202-temperature collection assembly, 203-collection point. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0033] Example 1

[0034] like Figures 3 to 5 As shown, a high-precision functional safety design shunt module in one embodiment of this utility model includes a copper busbar 1 and several acquisition boards 2.

[0035] Among them, the copper busbar 1 is connected to several alloy resistors 101. The resistance value of the alloy resistors 101 is fixed. When the current passes through the alloy resistors 101, a voltage will be generated across them. Based on Ohm's law, that is, the voltage is equal to the current multiplied by the resistance, the current value flowing in the circuit can be calculated.

[0036] Preferably, there are two alloy resistors 101, which are connected in series on the copper busbar 1. Figure 3 The state is shown. When one of the connection ports 201 fails, another connection port 201 can still meet the functional requirements to adapt to different usage needs.

[0037] In addition, the copper busbar 1 is provided with two sets of fixing holes 102. The copper busbar 1 can be fixed by passing bolts through the fixing holes 102.

[0038] like Figures 3 to 5 As shown, several acquisition boards 2 correspond to several alloy resistors 101 respectively. The acquisition boards 2 are used to install wiring ports 201, temperature acquisition components 202 and several pairs of acquisition points 203.

[0039] Preferably, the acquisition board 2 can be set as a 2-layer board or a 4-layer board, which can be set according to the requirements.

[0040] The acquisition board 2 has several pairs of connecting pads and several pairs of acquisition points 203 on the side near the alloy resistor 101. The connecting pads and acquisition points 203 correspond one-to-one. The acquisition board 2 is in contact with the copper busbar 1 through the connecting pads. The circuit current can be calculated by measuring the voltage across a corresponding pair of acquisition points 203.

[0041] Preferably, the distance between the connecting pad and the alloy resistor 101 is less than 1 mm to ensure measurement accuracy.

[0042] In addition, the collection plate 2 is provided with a plurality of solid through holes, and the fixing through holes are arranged outside the collection points 203, which are used for fixing the collection plate 2, thereby increasing the bonding strength and reliability of the copper bar 1 and the collection plate 2.

[0043] Specifically, each pair of collection points 203 is symmetrically arranged on both sides of the alloy resistor 101, that is, Figure 5 as shown in the state.

[0044] Optionally, the number of collection points 203 is 4 pairs or 6 pairs or 8 pairs, and the multi-point detection mode is adopted, which can reduce the influence of current non-uniformity and single-point collection limitation on detection, and improve the detection precision. Preferably, the number of collection points 203 in the present application is 8 pairs.

[0045] In addition, each pair of collection points 203 constitutes a collection circuit, and the collection circuit is electrically connected with a balancing resistor or a matching resistor, that is, Figure 4 as shown in the state, which is used for jointly compensating the influence of current non-uniformity, and also can average the detection values of each channel, thereby improving the measurement precision.

[0046] As shown in the state, Figures 3 to 5 the collection plate 2 is also provided with a temperature collection assembly 202, and the temperature collection assembly 202 is electrically connected with the wiring port 201. The temperature collection assembly 202 is used for monitoring the surface temperature of the alloy resistor 101.

[0047] Optionally, the temperature collection assembly 202 is a thermistor or a temperature sensor or a platinum resistance, which is used for monitoring the surface temperature of the copper bar 1 on both sides of the alloy resistor 101.

[0048] Among them, the collection plate 2 is provided with the wiring port 201, and each pair of collection points 203 is electrically connected with the wiring port 201. The wiring port 201 is used for outputting the current detection signal and the temperature detection signal.

[0049] In addition, the middle part of the collection plate 2 is a heat conduction area, and the heat conduction area is provided with a plurality of heat conduction contacts, and the heat conduction contacts are in contact with the fixing holes 102. The surface of the collection plate 2 is provided with a copper foil, the heat conduction contacts are in contact with the copper foil, and the temperature collection assembly 202 is in contact with the copper foil. The copper foil is used for transmitting the surface temperature of the fixing hole 102, that is, the surface temperature of the alloy resistor 101 is introduced to the temperature collection assembly 202 through the heat conduction contacts of the heat conduction area and the copper foil, thereby improving the detection precision of the surface temperature of the alloy resistor 101.

[0050] Preferably, the current collection signal and the temperature collection signal inside the copper bar 1 adopt differential signal wiring, that is, Figure 5 as shown in the state, which can control the characteristic impedance, reduce the loop area, increase the anti-interference and signal transmission stability.

[0051] Example two

[0052] The difference from example one is that a pair of alloy resistors 101 are connected in parallel to the copper bar 1, as shown in Figure 6 The rest is the same as example one.

[0053] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other embodiments without deviating from the spirit or essential characteristics of the application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims.

[0054] Furthermore, it is to be understood that the description of the present application is not limited to only one independent technical solution in each embodiment, and the description of the present application is only for the sake of clarity. A person skilled in the art should consider the description as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by a person skilled in the art.

Claims

1. A shunt module with high-precision functional safety design, characterized in that, include: A copper busbar, on which several alloy resistors are connected, and the copper busbar is provided with two sets of fixing holes; A plurality of acquisition boards are provided, each corresponding to a plurality of alloy resistors. The side of the acquisition board near the alloy resistor is provided with a plurality of pairs of connection pads and a plurality of pairs of acquisition points. The connection pads and acquisition points correspond one-to-one. The acquisition board is in contact with the copper busbar through the connection pads. Each pair of acquisition points is symmetrically arranged on both sides of the alloy resistor. A wiring port is installed on the surface of the acquisition board. Each pair of acquisition points is electrically connected to the wiring port. A temperature acquisition component is also installed on the acquisition board. The temperature acquisition component is electrically connected to the wiring port.

2. The shunt module with high-precision functional safety design according to claim 1, characterized in that, The number of alloy resistors is two.

3. The shunt module with high-precision functional safety design according to claim 1, characterized in that, The distance between the connecting pad and the alloy resistor is less than 1 mm.

4. A shunt module with high-precision functional safety design according to claim 1, characterized in that, The temperature acquisition component is a thermistor, a temperature sensor, or a platinum resistance thermometer.

5. A shunt module with high-precision functional safety design according to claim 1, characterized in that, The number of collection points is 4, 6, or 8 pairs.

6. A shunt module with high-precision functional safety design according to claim 5, characterized in that, Each pair of acquisition points constitutes an acquisition circuit, and the acquisition circuit is electrically connected to an equalizing resistor or a matching resistor.

7. A shunt module with high-precision functional safety design according to claim 1, characterized in that, The middle part of the acquisition plate is a heat-conducting area, which is provided with a number of heat-conducting contacts, and the heat-conducting contacts are in contact with the fixing holes.

8. A shunt module with high-precision functional safety design according to claim 7, characterized in that, The surface of the acquisition board is provided with copper foil, the thermally conductive contact is in contact with the copper foil, and the temperature acquisition component is in contact with the copper foil.

9. A shunt module with high-precision functional safety design according to claim 2, characterized in that, A pair of alloy resistors are connected in series on the copper busbar.

10. A shunt module with high-precision functional safety design according to claim 2, characterized in that, A pair of alloy resistors are connected in parallel to the copper busbar.

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