CN212845821U - Online line impedance monitoring system - Google Patents
Online line impedance monitoring system Download PDFInfo
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- CN212845821U CN212845821U CN202020678926.7U CN202020678926U CN212845821U CN 212845821 U CN212845821 U CN 212845821U CN 202020678926 U CN202020678926 U CN 202020678926U CN 212845821 U CN212845821 U CN 212845821U
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Abstract
The utility model relates to an online line impedance monitoring system, include: a battery to be tested and test equipment; the output port of the test equipment is connected with the positive pole of the battery to be tested through a first wire; the output port of the test equipment is connected with the negative pole through a third wire; a voltage sampling port of the test equipment is connected with the anode through a second wire; a voltage sampling port of the test equipment is connected with the negative electrode through a fourth wire; a voltage acquisition chip and a current acquisition chip are arranged in the test equipment, and in the process of testing the battery, the voltage acquisition chip acquires voltage values on four wires; the current acquisition chip acquires the charging or discharging current of the battery to be detected; monitoring the impedance of the electric wire at the anode of the battery to be tested according to the voltage values and the currents of the first electric wire and the second electric wire; and monitoring the impedance of the wire at the negative electrode of the battery to be tested according to the voltage values and the currents of the third wire and the fourth wire. Through the utility model discloses an above-mentioned system realizes improving the accuracy of battery test to the monitoring of line impedance.
Description
Technical Field
The utility model relates to a battery test technical field especially relates to an online line impedance monitoring system.
Background
The existing battery test system judges whether the battery charging and discharging process is abnormal or not by monitoring the battery voltage and the battery current, thereby achieving the purpose of testing the battery. However, in the battery test system, the test equipment and the battery are connected by the cable and the clamp, when the cable or the clamp in the middle of the test equipment and the battery is in poor contact, the contact resistance is increased, the temperature of a poor contact point is increased in high-current work, meanwhile, the resistance is increased due to the temperature increase, vicious circle is caused, the inaccuracy of the battery test is influenced, and in severe cases, the circuit is burnt due to overhigh temperature, and a fire disaster is caused.
Disclosure of Invention
The utility model aims at providing an online line impedance monitoring system is used for monitoring the line impedance in battery test system.
In order to achieve the above object, the utility model provides a following scheme:
an online line impedance monitoring system, comprising: a battery to be tested and test equipment;
the output port of the test equipment is connected with the anode of the battery to be tested through a first wire; the output port of the test equipment is connected with the negative electrode of the battery to be tested through a third wire;
a voltage sampling port of the test equipment is connected with the anode of the battery to be tested through a second wire; a voltage sampling port of the test equipment is connected with the negative electrode of the battery to be tested through a fourth wire;
a voltage acquisition chip and a current acquisition chip are arranged in the test equipment, and in the process of testing the battery, the voltage acquisition chip is used for respectively acquiring voltage values of the first wire, the second wire, the third wire and the fourth wire; the current acquisition chip is used for acquiring the charging or discharging current of the battery to be detected;
monitoring the impedance of the electric wire at the anode of the battery to be tested according to the first electric wire voltage value, the second electric wire voltage value and the current;
and monitoring the impedance of the electric wire at the negative electrode of the battery to be tested according to the voltage value of the third electric wire, the voltage value of the fourth electric wire and the current.
Optionally, the model of the voltage acquisition chip is TJM4558 CDT.
Optionally, the model of the current collection chip is INA826 AIDR.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:
the utility model provides an online line impedance monitoring system, include: a battery to be tested and test equipment; the output port of the test equipment is connected with the positive pole of the battery to be tested through a first wire; the output port of the test equipment is connected with the negative pole through a third wire; a voltage sampling port of the test equipment is connected with the anode through a second wire; a voltage sampling port of the test equipment is connected with the negative electrode through a fourth wire; a voltage acquisition chip and a current acquisition chip are arranged in the test equipment, and in the process of testing the battery, the voltage acquisition chip acquires voltage values on four wires; the current acquisition chip acquires the charging or discharging current of the battery to be detected; monitoring the impedance of the electric wire at the anode of the battery to be tested according to the voltage values and the currents of the first electric wire and the second electric wire; and monitoring the impedance of the wire at the negative electrode of the battery to be tested according to the voltage values and the currents of the third wire and the fourth wire. Through the utility model discloses an above-mentioned system realizes improving the accuracy of battery test to the monitoring of line impedance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of an online line impedance monitoring system provided by the present invention;
description of the symbols:
1. the first wire, 2, the second wire, 3, the third wire, 4, the fourth wire, 5, the battery to be tested.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing an online line impedance monitoring system is used for monitoring the line impedance in battery test system.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Fig. 1 is the utility model provides an online line impedance monitoring system schematic structure, as shown in fig. 1, online line impedance monitoring system includes: the test device comprises a battery to be tested 5 and test equipment, wherein an output port of the test equipment is connected with a positive electrode of the battery to be tested 5 through a first wire 1, and an output port of the test equipment is connected with a negative electrode of the battery to be tested 5 through a third wire 3. The voltage sampling port of the test equipment is connected with the positive electrode of the battery 5 to be tested through the second wire 2, and the voltage sampling port of the test equipment is connected with the negative electrode of the battery 5 to be tested through the fourth wire 4.
The test equipment embeds there are voltage acquisition chip and electric current acquisition chip, and in the battery test process, voltage acquisition chip is used for gathering respectively first electric wire 1 the second electric wire 2 the third electric wire 3 with voltage value on the fourth electric wire 4, the electric current acquisition chip is used for gathering the battery 5 that awaits measuring charges or discharge current. Specifically, the model of the voltage acquisition chip is TJM4558 CDT. The model of the current acquisition chip is INA826 AIDR.
And monitoring the wire impedance at the anode of the battery 5 to be tested according to the voltage value of the first wire 1, the voltage value of the second wire 2 and the current. And monitoring the wire impedance at the negative electrode of the battery 5 to be tested according to the voltage value of the third wire 3, the voltage value of the fourth wire 4 and the current.
Specifically, the first electric wire 1 is also referred to as a positive current wire, and the voltage value of the first electric wire 1 is VI +. The second electric wire 2 is also called a positive electrode voltage sampling line, and the voltage value of the second electric wire 2 is Vv +. The third wire 3 is also called negative current wire and the voltage value of the third wire 3 is VI-. The fourth wire 4 is also called a negative voltage sampling wire, and the voltage value of the fourth wire 4 is Vv-. The charging current of the battery 5 to be tested is I, the discharging current of the battery 5 to be tested is-I, the charging current and the discharging current are equal in magnitude and opposite in direction.
And calculating the wire impedance at the positive electrode of the battery 5 to be tested according to the voltage value of the first wire 1, the voltage value of the second wire 2 and the current, wherein the calculation formula is R + - (VI + -Vv +)/I, wherein R + represents the wire impedance at the positive electrode of the battery 5 to be tested. And calculating the wire impedance at the negative pole of the battery 5 to be tested according to the voltage value of the third wire 3, the voltage value of the fourth wire 4 and the current, wherein the calculation formula is R- ═ (VI-Vv-)/I, wherein R-represents the wire impedance at the positive pole of the battery 5 to be tested, and the total line impedance is R ═ R + + R-.
The above calculation formula is the existing common physical calculation formula, and the impedance of the line is calculated in real time according to the ratio of the line voltage and the line current. Under normal conditions, the line impedance is fixed without too much change, through an upper-order calculation formula, the total line impedance R can be calculated, and comprises a fixed resistor of a connecting lead, a contact resistor of a battery contact surface, switching contact resistors of different sections of the connecting lead and the like. The impedance of the line is monitored to ensure the accuracy of test data, judge abnormal lines in advance to eliminate fire danger, know the state of equipment clamps in advance and judge whether maintenance and cleaning are needed.
The utility model discloses mainly through increasing line current line voltage detection, through the ratio of line voltage and line current, the impedance of real-time calculation circuit, if certain circuit impedance is unusual, to unusual passageway stopping current test, the test data of avoiding continuing the test and arousing is inaccurate.
Through the utility model discloses a line impedance monitoring system, in the battery test process, to the line impedance carry out real-time supervision, mainly solve because of the circuit is not hard up or contact failure, lead to line impedance grow, temperature rise, arouse the emergence of serious abnormal conditions such as test data is inaccurate and catch fire.
The utility model has the advantages that:
1. and the impedance condition of the line is monitored in real time, and the accuracy of test data is ensured.
2. The impedance condition of the line is monitored in real time, and the abnormal line can be judged in advance to eliminate the fire danger.
3. The impedance condition of the line is monitored in real time, the state of the equipment clamp is known in advance, and whether maintenance and cleaning are needed or not is known.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (3)
1. An online line impedance monitoring system, comprising: a battery to be tested and test equipment;
the output port of the test equipment is connected with the anode of the battery to be tested through a first wire; the output port of the test equipment is connected with the negative electrode of the battery to be tested through a third wire;
a voltage sampling port of the test equipment is connected with the anode of the battery to be tested through a second wire; a voltage sampling port of the test equipment is connected with the negative electrode of the battery to be tested through a fourth wire;
a voltage acquisition chip and a current acquisition chip are arranged in the test equipment, and in the process of testing the battery, the voltage acquisition chip is used for respectively acquiring voltage values of the first wire, the second wire, the third wire and the fourth wire; the current acquisition chip is used for acquiring the charging or discharging current of the battery to be detected;
monitoring the impedance of the electric wire at the anode of the battery to be tested according to the first electric wire voltage value, the second electric wire voltage value and the current;
and monitoring the impedance of the electric wire at the negative electrode of the battery to be tested according to the voltage value of the third electric wire, the voltage value of the fourth electric wire and the current.
2. The on-line impedance monitoring system of claim 1, wherein the voltage acquisition chip is of type TJM4558 CDT.
3. The online line impedance monitoring system of claim 1, wherein the current collection chip is model number INA826 AIDR.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020678926.7U CN212845821U (en) | 2020-04-28 | 2020-04-28 | Online line impedance monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020678926.7U CN212845821U (en) | 2020-04-28 | 2020-04-28 | Online line impedance monitoring system |
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| Publication Number | Publication Date |
|---|---|
| CN212845821U true CN212845821U (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020678926.7U Active CN212845821U (en) | 2020-04-28 | 2020-04-28 | Online line impedance monitoring system |
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| Country | Link |
|---|---|
| CN (1) | CN212845821U (en) |
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2020
- 2020-04-28 CN CN202020678926.7U patent/CN212845821U/en active Active
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