CN111929503B - Insulation impedance testing device and method for fuel cell testing - Google Patents
Insulation impedance testing device and method for fuel cell testing Download PDFInfo
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- CN111929503B CN111929503B CN202010822662.2A CN202010822662A CN111929503B CN 111929503 B CN111929503 B CN 111929503B CN 202010822662 A CN202010822662 A CN 202010822662A CN 111929503 B CN111929503 B CN 111929503B
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- insulation
- fuel cell
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
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- 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
- G01R1/02—General constructional details
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- 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
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses an insulation impedance testing device and method for fuel cell testing, comprising feedback type electronic load alternating current output, feedback type electronic load and insulation monitor, wherein two wiring ports of the feedback type electronic load alternating current output are connected with wiring ends of the feedback type electronic load through a connected power line, one side of the front of the feedback type electronic load is fixedly provided with a feedback type electronic load input cathode, the other side of the front of the feedback type electronic load is fixedly provided with a feedback type electronic load input anode, the insulation monitor is internally arranged in the feedback type electronic load, and a high-voltage sampling cathode of the insulation monitor is communicated with the feedback type electronic load input cathode through a first connecting line.
Description
Technical Field
The invention relates to an insulation impedance testing device, in particular to an insulation impedance testing device and an insulation impedance testing method for testing a fuel cell, and belongs to the technical field of fuel cell testing devices.
Background
With the advocated energy conservation and environmental protection, new energy electric automobiles are becoming more common in life due to the advantages of energy conservation and no emission. Compared with the traditional internal combustion engine automobile, the electric automobile adopts an electric drive system, the high voltage exists in the electric automobile, the high voltage can relate to integral insulation check, and particularly the integral insulation performance of the electric automobile is possibly reduced under the condition that the environment changes such as vibration, temperature and humidity and the like when the service life of the automobile is prolonged. The change can endanger the safety of a user and influence the operation of the automobile, so that the electric automobile has very important evaluation on the internal electric insulation performance of the electric automobile, ensures the insulation performance of the automobile and has important significance for ensuring safe and reliable operation.
At present, two modes of energy supply of new energy electric automobiles are a vehicle-mounted power battery pack, and another mode is a vehicle-mounted fuel battery supported by recent countries. The insulation of the fuel cell output is directly related to the insulation of the whole vehicle platform, so that fuel cell manufacturers pay extra attention to the insulation of the fuel cell output to the ground in the fuel cell development and production test links. Often in reality, the test bench of the fuel cell manufacturer is excessively complicated to install integrated test equipment and sampling equipment, such as a DCDC converter, an air compressor, a fuel cell engine, a feedback type electronic load and various parameter acquisition sensors, and a customer can encounter complicated integration of a test system in actual use. In this case, adding other instrument testing instruments increases the complexity and difficulty of the whole testing rack, so that the color scheme of the insulation monitor integrated inside the feedback load is generated.
In summary, in the process of implementing the present invention, the inventor finds that at least the following problems in the prior art are not solved:
(1) The user buys the insulation detector and adds the insulation detector on the test bench to make the bench mess;
(2) When a user needs to know that the insulation resistance is large under the current test condition, a single upper computer display interface is needed to communicate with the insulation monitor to read the resistance value, so that the actual user has complicated operation;
(3) The additional insulation monitor is added, and a power supply circuit of the insulation monitor is added with a communication circuit of the insulation monitor, so that the stability is poor;
(4) One rack has various monitoring alarm functions, which easily causes users to confuse the alarm.
Disclosure of Invention
The present invention is directed to an insulation resistance testing device and method for testing fuel cells, so as to solve the above-mentioned problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the insulation impedance testing device comprises feedback type electronic load alternating current output, feedback type electronic load and an insulation monitor, wherein two wiring ports of the feedback type electronic load alternating current output are connected with wiring ends of the feedback type electronic load through a connected power line, and the insulation monitor is installed in the feedback type electronic load.
As a preferable technical scheme of the invention, one side of the front face of the feedback type electronic load is fixedly provided with a feedback type electronic load input negative electrode.
As a preferable technical scheme of the invention, the other side of the front side of the feedback type electronic load is fixedly provided with a feedback type electronic load input positive electrode.
As an optimal technical scheme of the invention, the feedback type electronic load input negative electrode and the feedback type electronic load input positive electrode are both made of copper bars.
As a preferable technical scheme of the invention, the high-voltage sampling negative electrode of the insulation monitor is communicated with the feedback type electronic load input positive electrode through a first connecting wire, and the high-voltage sampling positive electrode of the insulation monitor is communicated with the feedback type electronic load input positive electrode through a second connecting wire.
As a preferable technical scheme of the invention, the low-voltage power supply end of the insulation monitor is connected with the auxiliary power supply end inside the feedback type electronic load through a third connecting wire.
As an optimal technical scheme of the invention, a CAN operation interface is fixedly arranged at the top end of the feedback type electronic load.
As a preferred embodiment of the present invention, an insulation resistance test method for use in a fuel cell test, the test method comprising the steps of:
s1: during testing, the fuel cell, the two twisted pair shielding wires, the feedback type electronic load alternating current output and the feedback type electronic load are placed at the workbench together, one end of each twisted pair shielding wire is connected with the feedback type electronic load input negative electrode and the feedback type electronic load input positive electrode, and the other ends of the two twisted pair shielding wires are correspondingly connected with the positive electrode and the negative electrode of the fuel cell;
s2: the feedback type electronic load alternating current output and the feedback type electronic load are connected through a power line, and then a power switch of the feedback type electronic load alternating current output is started, voltage and current pass through the feedback type electronic load, and a low-voltage power supply end of the insulation monitor is connected with an auxiliary power supply end inside the feedback type electronic load through a third connecting line to supply voltage and current required by the insulation monitor;
s3: the first connecting wire and the second connecting wire are connected with the feedback type electronic load input negative electrode and the feedback type electronic load input negative electrode, so that the insulation monitor is used for monitoring the insulation impedance of the fuel cell to the ground and the ground in the testing process, and in addition, the collected positive impedance value and the collected negative impedance value to the ground are transmitted to a CAN operation interface at the top end of the feedback type electronic load through the twisted pair shielding wire, so that the insulation impedance is displayed on the feedback type electronic load.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the insulation impedance testing device and method for the fuel cell test, the insulation monitor is arranged in the feedback type electronic load, and the integration quantity of the fuel cell test rack is reduced, the equipment redundancy degree is reduced, the stability of the fuel cell test rack is improved, the operation complexity degree of a user is reduced, the alarm source is not easy to confuse, and the practicability is strong.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic diagram of a device symbol circuit according to the present invention.
In the figure: 1. feedback type electronic load alternating current output; 2. feedback type electronic load; 3. CAN operation interface; 4. feedback type electronic load input cathode; 5. the feedback type electronic load inputs the positive pole; 6. a power line; 7. an insulation monitor; 8. a first connecting line; 9. a second connecting line; 10. and a third connecting line.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, the present invention provides a technical scheme of an insulation resistance testing device and method for testing fuel cells:
according to the embodiment shown in fig. 1, the electronic load comprises a feedback type electronic load alternating current output 1 and a feedback type electronic load 2, two wiring ports of the feedback type electronic load alternating current output 1 are connected with wiring ends of the feedback type electronic load 2 through a connected power line 6, one side of the front face of the feedback type electronic load 2 is fixedly provided with a feedback type electronic load input negative electrode 4, the negative electrode of a fuel cell is conveniently connected through the feedback type electronic load input negative electrode 4, the other side of the front face of the feedback type electronic load 2 is fixedly provided with a feedback type electronic load input positive electrode 5, the positive electrodes of the fuel cell are conveniently connected through the feedback type electronic load input positive electrode 5, the feedback type electronic load input negative electrode 4 and the feedback type electronic load input positive electrode 5 which are made of copper bars are made of good conductive performance, the loss of current is reduced, and the top end of the feedback type electronic load 2 is fixedly provided with a CAN operation interface 3 which is convenient for displaying insulation resistance values and is convenient for users to understand intuitively.
According to the embodiment shown in fig. 2, the fuel cell comprises a feedback type electronic load, an insulation monitor 7 is installed in the feedback type electronic load 2, a high-voltage sampling negative electrode of the insulation monitor 7 is communicated with a feedback type electronic load input positive electrode 5 through a first connecting wire 8, a high-voltage sampling positive electrode of the insulation monitor 7 is communicated with the feedback type electronic load input positive electrode 5 through a second connecting wire 9, a low-voltage power supply end of the insulation monitor 7 is connected with an auxiliary power supply end in the feedback type electronic load 2 through a third connecting wire 10, the auxiliary power supply end in the feedback type electronic load 2 supplies power through the insulation monitor 7, so that the insulation monitor 7 plays a role in monitoring insulation resistance of the fuel cell to the positive and negative grounds in a testing process, and in addition, the collected positive ground resistance value and the negative ground resistance value are transmitted to a CAN operation interface 3 at the top end of the feedback type electronic load 2 through a twisted pair shielding wire, and thus insulation resistance is displayed on the feedback type electronic load 2.
When the insulation impedance testing device and the insulation impedance testing method are particularly used, before testing, a user firstly places a fuel cell, two twisted pair shielding wires, a power wire 6, a feedback type electronic load alternating current output 1 and a feedback type electronic load 2 at a workbench together, and faces a control panel of the feedback type electronic load alternating current output 1 to the user, then connects a feedback type electronic load input positive electrode 5 and a feedback type electronic load input negative electrode 4 on the feedback type electronic load 2 through one ends of the two twisted pair shielding wires, and correspondingly connects the other ends of the two twisted pair shielding wires with the positive electrode and the negative electrode of the fuel cell; when the feedback type electronic load alternating current output 1 and the feedback type electronic load 2 are connected through the power line 6 and are measured, the voltage and current in the feedback type electronic load 2 pass through by starting the power switch of the feedback type electronic load alternating current output 1, and the low-voltage power supply end of the insulation monitor 7 is connected with the auxiliary power supply end inside the feedback type electronic load 2 through the third connecting line 10 to supply the voltage and current required by the insulation monitor 7; the first connecting wire 8 and the second connecting wire 9 are connected with the feedback type electronic load input negative electrode 4 and the feedback type electronic load input positive electrode 5, so that the insulation monitor 7 is used for monitoring the insulation resistance of the fuel cell to the ground and the negative ground in the testing process, in addition, the collected positive ground resistance value and the collected negative ground resistance value are transmitted to the CAN operation interface 3 at the top end of the feedback type electronic load 2 through the twisted pair shielding wire, and the insulation resistance is displayed on the feedback type electronic load 2.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is merely for convenience in describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and defined otherwise, for example, it may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The insulation impedance testing device for the fuel cell test comprises a feedback type electronic load alternating current output (1), a feedback type electronic load (2) and an insulation monitor (7), and is characterized in that two wiring ports of the feedback type electronic load alternating current output (1) are connected with wiring ends of the feedback type electronic load (2) through a connected power line (6), and the insulation monitor (7) is arranged in the feedback type electronic load (2);
the high-voltage sampling anode of the insulation monitor (7) is communicated with the feedback type electronic load input anode (5) through a first connecting wire (8), the high-voltage sampling anode of the insulation monitor (7) is communicated with the feedback type electronic load input anode (5) through a second connecting wire (9), the low-voltage power supply end of the insulation monitor (7) is connected with the auxiliary power supply end inside the feedback type electronic load (2) through a third connecting wire (10), and the auxiliary power supply end inside the feedback type electronic load (2) supplies power to the electronic load through the insulation monitor (7);
the top end of the feedback type electronic load (2) is fixedly provided with a CAN operation interface (3) which is used for displaying insulation resistance on the feedback type electronic load;
the insulation monitor (7) is used for monitoring the insulation resistance of the fuel cell to the ground and the negative insulation resistance of the fuel cell to the ground in the test process; the collected positive and negative ground impedance values are transmitted to a CAN operation interface at the top end of the feedback type electronic load through the twisted pair shielding wire.
2. An insulation resistance testing device for use in a fuel cell test according to claim 1, wherein: and one side of the front face of the feedback type electronic load (2) is fixedly provided with a feedback type electronic load input cathode (4).
3. An insulation resistance testing device for use in a fuel cell test according to claim 1, wherein: the other side of the front face of the feedback type electronic load (2) is fixedly provided with a feedback type electronic load input positive electrode (5).
4. An insulation resistance testing apparatus for use in a fuel cell test according to claim 2 or 3, wherein: the feedback type electronic load input negative electrode (4) and the feedback type electronic load input positive electrode (5) are both made of copper bars.
5. An insulation resistance testing method for use in a fuel cell test, characterized in that the insulation resistance testing device for use in a fuel cell test as claimed in any one of claims 1 to 4 is employed, the testing method comprising the steps of:
s1, during testing, a fuel cell, two twisted pair shielding wires, a feedback type electronic load alternating current output (1) and a feedback type electronic load (2) are placed at a workbench together, one ends of the two twisted pair shielding wires are connected with a feedback type electronic load input positive electrode (5) and a feedback type electronic load input negative electrode (4), and the other ends of the two twisted pair shielding wires are correspondingly connected with a positive electrode and a negative electrode of the fuel cell;
s2, connecting a feedback type electronic load alternating current output (1) and a feedback type electronic load (2) through a power line (6), and then starting a power switch of the feedback type electronic load alternating current output (1), wherein voltage and current pass through the feedback type electronic load (2), and a low-voltage power supply end of an insulation monitor (7) is connected with an auxiliary power supply end inside the feedback type electronic load (2) through a third connecting wire (10) to supply voltage and current required by the insulation monitor (7);
and S3, connecting a feedback type electronic load input negative electrode (4) and a feedback type electronic load input positive electrode (5) through a first connecting wire (8) and a second connecting wire (9), so that the insulation monitor (7) is used for monitoring the insulation impedance of the fuel cell to the ground and the negative ground in the testing process, and in addition, the collected positive ground impedance value and the collected negative ground impedance value are transmitted to a CAN operation interface (3) at the top end of the feedback type electronic load (2) through a twisted pair shielding wire, so that the insulation impedance is displayed on the feedback type electronic load (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010822662.2A CN111929503B (en) | 2020-08-17 | 2020-08-17 | Insulation impedance testing device and method for fuel cell testing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010822662.2A CN111929503B (en) | 2020-08-17 | 2020-08-17 | Insulation impedance testing device and method for fuel cell testing |
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| CN111929503A CN111929503A (en) | 2020-11-13 |
| CN111929503B true CN111929503B (en) | 2023-07-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116818330A (en) * | 2023-06-28 | 2023-09-29 | 北京亿华通科技股份有限公司 | Automatic static testing device for fuel cell engine |
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| CN207164146U (en) * | 2017-09-29 | 2018-03-30 | 成都雅骏新能源汽车科技股份有限公司 | A kind of insulating resistor detecting circuit of power battery of pure electric automobile |
| CN110053519B (en) * | 2019-04-24 | 2019-11-19 | 中通客车控股股份有限公司 | A kind of fuel battery passenger car insulating monitoring control system, method and vehicle |
| CN110588442B (en) * | 2019-08-16 | 2024-04-12 | 上海电气集团股份有限公司 | High-pressure tank of fuel cell system |
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| CN103091645A (en) * | 2012-12-02 | 2013-05-08 | 威海广泰空港设备股份有限公司 | Alternating current 400 Hz medium frequency power supply test system with electric power feedback function |
| CN203275553U (en) * | 2013-06-03 | 2013-11-06 | 国家电网公司 | Feedback type charger detection platform |
| CN205809192U (en) * | 2016-04-26 | 2016-12-14 | 郑州宇通客车股份有限公司 | A kind of high-power charger test platform based on energy feedback electronic load instrument |
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