CN115290951A - High-voltage-resistance current detection splitter for new energy automobile battery management system - Google Patents
High-voltage-resistance current detection splitter for new energy automobile battery management system Download PDFInfo
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- CN115290951A CN115290951A CN202211027642.1A CN202211027642A CN115290951A CN 115290951 A CN115290951 A CN 115290951A CN 202211027642 A CN202211027642 A CN 202211027642A CN 115290951 A CN115290951 A CN 115290951A
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- shunt
- pcb
- current detection
- battery management
- resistor body
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- 238000001514 detection method Methods 0.000 title claims abstract description 40
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052802 copper Inorganic materials 0.000 claims abstract description 17
- 239000010949 copper Substances 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 229910000896 Manganin Inorganic materials 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000009792 diffusion process Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 230000020169 heat generation Effects 0.000 claims 1
- 238000012806 monitoring device Methods 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 abstract description 11
- 238000013461 design Methods 0.000 abstract description 6
- 230000005855 radiation Effects 0.000 abstract description 3
- 238000007306 functionalization reaction Methods 0.000 abstract description 2
- XOMKZKJEJBZBJJ-UHFFFAOYSA-N 1,2-dichloro-3-phenylbenzene Chemical compound ClC1=CC=CC(C=2C=CC=CC=2)=C1Cl XOMKZKJEJBZBJJ-UHFFFAOYSA-N 0.000 description 8
- 238000009434 installation Methods 0.000 description 6
- 238000005070 sampling Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical group [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
Abstract
The invention discloses a high-voltage-resistance current detection shunt for an automobile new energy battery management system, belongs to the technical field of new energy automobile battery management systems, and relates to a current detection technology, wherein the current detection technology comprises a soft copper bar and a shunt resistor body; the shunt resistor body comprises a heating source and a conducting medium; the conducting medium is arranged at two ends of the heating source; a PCB is arranged on the shunt resistor body, and the PCB is connected with the shunt resistor body through a PIN stitch; the PCB is provided with the connector, and the PCB is also provided with the temperature acquisition unit, so that the heat dissipation efficiency of the shunt is improved in a radiation heat dissipation mode and a conduction heat dissipation mode; signal acquisition is carried out through an integrated structure design, so that the stability of the shunt is improved; through increasing temperature sensor, make it can gather shunt surface temperature rise, correct the measuring error who leads to because of the temperature through system operation, improve the flow detection ability of shunt, realize multi-functionalization, integrate.
Description
Technical Field
The invention belongs to the technical field of new energy automobile battery management systems, relates to a current detection technology, and particularly relates to a high-voltage-resistance current detection shunt for an automobile new energy battery management system.
Background
The battery management system is a bridge for connecting a new energy automobile core component battery and the whole automobile. With the benefit of the development of new energy vehicles, battery management systems, which are core components, have also been rapidly developed. The total current detection is indispensable, and the current detection of the battery management system is divided into a traditional Hall sensor detection mode and a shunt detection mode. The shunt detection mode has the advantages of high measurement precision, relatively low cost, simple measurement method, few used equipment, convenience and rapidness, and is applied to a battery management system. The measuring principle of the shunt detection mode is that the voltage at two ends of the shunt is directly measured, and then the measured voltage is divided by the resistance value of the shunt according to ohm's law, so that the current value in the circuit is obtained for current detection.
However, with the increase of the power consumption of the new energy automobile, the range of current detection is increased, the increase of the current value can cause the temperature of the current divider to rise in the detection process, so that temperature drift is generated, and the reason for the temperature drift is that the parameters are changed when the environmental temperature changes, so that the static operating point is unstable, the dynamic parameters of the circuit are unstable, and even the circuit cannot work normally;
therefore, the invention provides a high-voltage-resistance current detection shunt for an automobile new energy battery management system.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a high-voltage-resistance current detection diverter for an automobile new energy battery management system, which can increase the heat dissipation efficiency of the diverter in the modes of radiation heat dissipation and conduction heat dissipation; the stability of the shunt is improved by collecting signals through an integrated structure design; the temperature sensor is added, so that the temperature rise on the surface of the shunt can be collected, the measurement error caused by the temperature is corrected through system operation, the current detection capability of the shunt is improved, and the multifunction and integration are realized; through structural design, make shunt and copper bar link to each other with the welded form, make its structure can deal with littleer and complicated installation environment, reduce the installation cost of whole car.
In order to achieve the above object, an embodiment according to a first aspect of the present invention provides a high withstand voltage current divider for an automobile new energy battery management system, including a soft copper bar and a current divider resistor body; the shunt resistor body and the soft copper bar are welded in a diffusion welding mode;
the shunt resistor body comprises a heating source and a conducting medium; the conducting medium is arranged at two ends of the heating source;
the splitter resistor body is provided with a PCB, and the PCB is connected with the splitter resistor body through a PIN stitch;
the PCB is provided with a connector, the PCB is also provided with a temperature acquisition unit, and the temperature acquisition unit is arranged on the surface of the PCB right above the manganin.
Preferably, the heating source is manganese copper; the conducting medium is red copper; the thickness of the heat generating source is smaller than that of the conducting medium.
Preferably, one end of the PIN PIN is welded with the PCB; and the other end of the PIN PIN is connected with a conducting medium of the shunt resistor body.
Preferably, the surface of the PCB is further provided with a capacitor.
Preferably, the connector comprises 6 PINs, wherein 1/2 of the PINs are respectively connected with two ends of the temperature sensor, and 5/6 of the PINs are respectively connected with PIN PINs.
Compared with the prior art, the invention has the beneficial effects that:
1. in the prior art, when the current detection highest range is increased, the heat generated by the current divider is increased due to the increase of current, the resistance value and the measurement precision of the current divider are influenced, and the battery management system is failed due to serious interference of the battery; the heat dissipation efficiency of the current divider is improved in a radiation heat dissipation mode and a conduction heat dissipation mode;
2. the traditional voltage signal acquisition point of the current detection splitter is used for installing a sampling wire harness in a screw fastening mode, so that the local temperature of a sampling point is too high due to screw loosening in the running process of an automobile, and the falling of a sampling line influences the signal acquisition; the signal acquisition is carried out through the integrated structure design, so that the stability of the shunt is improved;
3. the traditional 3. Current detection shunt only has the voltage acquisition function; according to the temperature sensor, the temperature rise on the surface of the shunt can be collected by the temperature sensor, the measurement error caused by the temperature is corrected through system operation, the current detection capacity of the shunt is improved, and the multifunction and integration are realized;
this application passes through structural design, makes shunt and copper bar link to each other with the welded form, makes its structure can deal with littleer and complicated installation environment, reduces the installation cost of whole car.
Drawings
FIG. 1 is a schematic structural view of a high withstand voltage current shunt according to the present invention;
FIG. 2 is a front view of the high withstand voltage current sensing shunt of the present invention;
FIG. 3 is a side view of a high withstand voltage current shunt according to the present invention;
FIG. 4 is a R-T relationship curve measured by the high withstand voltage current splitter of the present invention;
FIG. 5 is a plot of R-T relationship measured conventionally using a TD1540 DC shunt calibration apparatus.
In the figure: 1. soft copper bars; 2. a shunt resistor body; 3. a heat generating source; 4. a conductive medium; 5. a PCB board; 6. a PIN stitch; 7. a connector is provided.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the prior art, along with the increase of the power consumption of a new energy automobile vehicle, the range of current detection is increased, the increase of a current value can cause the temperature of a current divider to rise in the detection process, so that temperature drift is generated, and when the temperature drift is generated seriously, the dynamic parameters of a circuit are unstable, even the circuit cannot work normally;
meanwhile, an integrated, multifunctional and integrated design concept is provided, and a new integrated, multifunctional and integrated flow detection current divider with high voltage resistance, wider range and special structure is provided; the purpose of the application is to provide an integrated, multifunctional and integrated flow detection diverter with high voltage resistance, larger range and special structure;
simultaneously the high withstand voltage current detection shunt that this application provided is when increasing current detection maximum scope, still through increasing temperature sensor, makes it can gather shunt surface temperature rise, corrects the measuring error that leads to because of the temperature rise through system's operation, improves the current detection ability of shunt, realizes multi-functionalization, integrates.
As shown in fig. 1-3, a high voltage-resistant current detection splitter for an automobile new energy battery management system comprises a soft copper bar 1 and a splitter resistor body 2; the shunt resistor body 2 is welded with the soft copper bar 1 in a diffusion welding mode, the smaller and more responsible installation environment can be coped with in the diffusion welding mode, and the installation cost of the whole vehicle is reduced.
The shunt resistor 2 includes a heat source 3 and a conductive medium 4; in the present application, the heat generating source 3 is manganin; the overcurrent capacity of the high-voltage-withstanding current detection shunt can be ensured by adopting the manganin as the heating source 3;
the two ends of the manganin are provided with conducting media 4; in the present application, the conductive medium 4 is copper; it is well known that red copper is widely used for the conductive medium 4 due to its good heat and electrical conductivity; in the application, the red copper is used as the conductive medium 4, so that the current and heat can be well conducted, and the heat conducting capacity of the high-voltage-resistance current detecting shunt is further improved;
it should be noted that, in the present application, the thickness of the manganese copper of the heat generating source 3 is smaller than that of the red copper of the conductive medium 4; the effective heat dissipation area can be increased by reducing the thickness of the manganese copper of the heating source 3, and the heat dissipation efficiency is further improved by increasing the thickness of the red copper of the conducting medium 4;
in the present application, a PCB 5 is disposed on the splitter resistor body 2, and the PCB 5 is connected to the splitter resistor body 2 through a PIN 6; a sampling wire harness is arranged on the PCB 5, and one end of the PIN PIN 6 is welded with the sampling wire harness arranged on the PCB 5; the other end of the PIN stitch 6 is connected with the conducting medium 4 of the shunt resistor body 2;
the PCB 5 is provided with a connector 7, and the connector 7 is used for outputting signals; the PCB 5 is also provided with a temperature acquisition unit, and the connector 7 is used for transmitting signals acquired by the temperature acquisition unit to an automobile new energy battery management system;
it should be further explained that the temperature acquisition unit is specifically a temperature sensor, and the temperature sensor is installed on the surface of the PCB 5 right above the manganin;
a capacitor is arranged on the surface of the PCB 5;
in one embodiment, the connector 7 is a Molex connector 7, and the temperature sensor is model number village NCP18XH103F03RB; the resistance value of the temperature sensor is 10K omega +/-1%; the value of B is 25/85 ℃=3434K;
the model of the connector 7 is Molex5023520600;
the type of the capacitor is Samsung CL21B104KCFNNNE;
the connector 7 comprises 6 PINs, wherein 1/2 of the PINs are respectively connected with two ends of the temperature sensor, and 5/6 of the PINs are respectively connected with the PIN PINs 6.
In a specific embodiment, the specification parameters of the high withstand voltage current shunt for the new energy battery management system of the automobile provided by the invention are set as shown in table one and table two:
watch 1
Watch two
Setting according to the specifications of the first table and the second table, accessing into an automobile new energy battery management system, and obtaining an R-T table of the resistance value and the temperature, as shown in the third table:
watch III
| Type number | NCP18XH103F03RB | Model number | NCP18XH103F03RB |
| Resistance value | 10KΩ | Resistance value | 10KΩ |
| B value | 3380 | B value | 3380 |
| Temperature (. Degree. C.) | Resistance (K omega) | Temperature (. Degree. C.) | Resistance (K omega) |
| -40 | 195.652 | 45 | 4.917 |
| -35 | 148.171 | 50 | 4.161 |
| -30 | 113.347 | 55 | 3.535 |
| -25 | 87.559 | 60 | 3.014 |
| -20 | 68.237 | 65 | 2.586 |
| -15 | 53.650 | 70 | 2.228 |
| -10 | 42.506 | 75 | 1.925 |
| -5 | 33.892 | 80 | 1.669 |
| 0 | 27.219 | 85 | 1.452 |
| 5 | 22.021 | 90 | 1.268 |
| 10 | 17.926 | 95 | 1.110 |
| 15 | 14.674 | 100 | 0.974 |
| 20 | 12.081 | 105 | 0.858 |
| 25 | 10.000 | 110 | 0.758 |
| 30 | 8.315 | 115 | 0.672 |
| 35 | 6.948 | 120 | 0.596 |
| 40 | 5.834 | 125 | 0.531 |
FIG. 4 shows the R-T relationship; according to the curve, the resistance value is reduced along with the temperature increase; FIG. 4 is obtained according to Table III;
under the same set condition, a TD1540 direct current shunt calibrating device is utilized, and 10A current is conducted for resistance value test; wherein the conditions are as follows:
1) 50 test samples are obtained;
2) Testing temperature points (-40 ℃ to +125 ℃), wherein one temperature test point is arranged at every 10 ℃;
3) Recording the resistance value of the test, and taking the average value;
the obtained experimental data are shown in a table four;
| temperature (. Degree. C.) | Resistance (mu omega) | Temperature (. Degree.C.) | Resistance (mu omega) |
| -40 | 99.1884 | 50 | 100.1746 |
| -30 | 99.3878 | 60 | 100.2323 |
| -20 | 99.5313 | 70 | 100.2586 |
| -10 | 99.6487 | 80 | 100.2660 |
| 0 | 99.7704 | 90 | 100.2746 |
| 10 | 99.8717 | 100 | 100.3159 |
| 20 | 99.9813 | 110 | 100.3205 |
| 22 | 100.0000 | 120 | 100.3286 |
| 30 | 100.0593 | 125 | 100.3304 |
| 40 | 100.1213 |
Watch four
As shown in fig. 5, is an R-T relationship curve; the curve can be used to show that the temperature rises with the rise of the temperature;
according to comparison, the resistance measured by the high-voltage-resistance current detection splitter has a deviation value of 100 [ mu ] omega compared with a conventional TD1540 direct current shunt calibrating device, and the deviation value is generated due to temperature drift during detection by the conventional TD1540 direct current shunt calibrating device.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.
Claims (5)
1. A high-voltage-resistance current detection shunt for an automobile new energy battery management system is characterized by comprising a soft copper bar (1) and a shunt resistor body (2); the shunt resistor body (2) and the soft copper bar (1) are welded in a diffusion welding mode;
the shunt resistor body (2) comprises a heating source (3) and a conductive medium (4); the conducting media (4) are arranged at two ends of the heating source (3);
the shunt resistor body (2) is provided with a PCB (printed circuit board) (5), and the PCB (5) is connected with the shunt resistor body (2) through a PIN PIN (6);
the temperature monitoring device is characterized in that a connector (7) is installed on the PCB (5), a temperature acquisition unit is further installed on the PCB (5), and the temperature acquisition unit is installed on the surface of the PCB (5) right above the manganin.
2. The high voltage-resistant current detection shunt for the new energy battery management system of the automobile according to claim 1, wherein the heat generation source (3) is manganin; the conducting medium (4) is red copper; the thickness of the heat generating source (3) is smaller than that of the conducting medium (4).
3. The high voltage-resistant current detection shunt for the new energy battery management system of the automobile according to claim 1, characterized in that one end of the PIN PIN (6) is welded with the PCB (5); the other end of the PIN PIN (6) is connected with the conducting medium (4) of the shunt resistor body (2).
4. The high voltage-resistant current detection shunt for the new energy battery management system of the automobile according to claim 1, characterized in that a capacitor is further arranged on the surface of the PCB (5).
5. The high voltage-withstanding current detection shunt for the new energy battery management system of the automobile is characterized in that the connector (7) comprises 6 PINs, wherein 1/2 PINs are respectively connected to two ends of the temperature sensor, and 5/6 PINs are respectively connected with the PIN PINs (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211027642.1A CN115290951A (en) | 2022-08-25 | 2022-08-25 | High-voltage-resistance current detection splitter for new energy automobile battery management system |
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| CN202211027642.1A CN115290951A (en) | 2022-08-25 | 2022-08-25 | High-voltage-resistance current detection splitter for new energy automobile battery management system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117091712A (en) * | 2023-10-20 | 2023-11-21 | 杭州得明电子有限公司 | Manganese copper temperature testing method and device for IR46 Internet of things meter |
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2022
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Application publication date: 20221104 |