CN218974501U - Insulation detection tool for high-voltage component of fuel cell - Google Patents
Insulation detection tool for high-voltage component of fuel cell Download PDFInfo
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- CN218974501U CN218974501U CN202320030562.5U CN202320030562U CN218974501U CN 218974501 U CN218974501 U CN 218974501U CN 202320030562 U CN202320030562 U CN 202320030562U CN 218974501 U CN218974501 U CN 218974501U
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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
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- 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
Abstract
The utility model provides an insulation detection tool for a high-voltage component of a fuel cell, which comprises the following components: the device comprises a water supplementing tank, a deionizing tank, a first stop valve, a circulating water pump, a first pressure gauge, a second stop valve, a high-voltage component, a conductivity meter, an eighth stop valve, a ninth stop valve, an insulation detection module and a transparent pipe; the circulating water pump drives circulating water to enable each high-pressure part to be in a wet state, and then the insulation detection module is adopted to detect whether the insulation is qualified or not in real time, so that the insulation resistance of a plurality of high-pressure parts can be detected efficiently and simultaneously.
Description
Technical Field
The utility model belongs to the technical field of fuel cell detection, and particularly relates to an insulation detection tool for a high-voltage component of a fuel cell.
Background
In recent years, a high-voltage component of a conventional fuel vehicle is adapted to the development of a hydrogen fuel cell vehicle, and is modified and applied to the hydrogen fuel cell vehicle, and along with the use of the hydrogen fuel cell vehicle, the high-voltage component often has an insulation failure fault, so that a fuel cell system cannot normally operate. In order to ensure the safety of the vehicle, the current whole vehicle factories establish fault grades and corresponding treatment schemes for insulation failure faults of the vehicle, but cannot prevent unqualified high-voltage components from being assembled on the fuel cell system. If the high-voltage components with insulation failure are detected after the whole vehicle is installed on the fuel cell system, long reworking and replacing time is required, and a great amount of maintenance and service cost is generated.
In order to avoid insulation failure faults of the fuel cell system caused by the fact that high-voltage components (a water pump, an air compressor, a PTC heater and a DCDC) with unqualified insulation are assembled to the system, wet insulation detection is needed before the high-voltage components of the fuel cell system are assembled to the system. Chinese patent No. CN112373309a discloses a method and system for automatically positioning insulation failure high voltage component of new energy vehicle, the method comprising the steps of: the method comprises the steps of carrying out priority division on different high-voltage components, and setting fault treatment strategies for different priorities; setting the positioning sequence of the high-voltage components according to the priorities of the different high-voltage components; sequentially controlling the high-voltage contactors connected with the high-voltage components to be closed according to the set positioning sequence, monitoring whether the high-voltage system has an insulation failure fault, if so, positioning the high-voltage components to have the insulation failure, otherwise, controlling the high-voltage contactors connected with the next high-voltage components to be closed according to the set positioning sequence until all the high-voltage components with the insulation failure are positioned; and executing a corresponding fault processing strategy according to the priority of all the positioned high-voltage components with insulation failure. The above disclosed utility model is only suitable for monitoring and positioning the insulation failure of the high-voltage components in the running process of the fuel cell automobile, but cannot prevent the unqualified high-voltage components from being assembled on the fuel cell system, however, at present, a complete set of system, an efficient insulation detection device and a detection method do not exist for the high-voltage components to be assembled on the fuel cell system, and if each high-voltage component is subjected to independent insulation detection, waterway pipelines suitable for each high-voltage component are required to be manufactured; in addition, if a plurality of power circulating water pumps for adding water, exhausting and pressurizing are required to be arranged for simultaneously detecting the parts, the waste of the power circulating water pumps and the testing space is caused, and the detection efficiency is low; if the high-voltage components with unqualified insulation are assembled to the fuel cell system of the automobile, a great deal of reworking time and maintenance cost are consumed, so that it is necessary to design and develop a set of insulation detection device and detection method for the high-voltage components of the fuel cell system.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model provides an insulation detection tool for a high-voltage component of a fuel cell, which comprises the following components: the device comprises a water supplementing tank, a deionizing tank, a first stop valve, a circulating water pump, a first pressure gauge, a second stop valve, a first high-pressure component, a conductivity meter, an eighth stop valve, a ninth stop valve, an insulation detection module and a transparent pipe; the first high-voltage component is provided with an insulation detection module which is electrically connected;
the water outlet of the water supplementing tank is provided with a deionizing tank, the deionizing tank is connected with the inlet of the circulating water pump through the first stop valve, the outlet of the circulating water pump is provided with the first pressure gauge, the outlet of the first pressure gauge is connected with the inlet of the second stop valve, and the outlet of the second stop valve is provided with the first high-pressure component, the eighth stop valve, the second pressure gauge and the conductivity meter which are connected in sequence;
the outlet of conductivity meter is provided with ninth stop valve, conductivity meter connects the return water mouth of moisturizing case, conductivity meter with be provided with the transparent pipe on the connecting line between the moisturizing case.
Specifically, the outlet of the first pressure gauge is respectively connected with the inlets of the second stop valve and the third stop valve; the outlet of the third stop valve is provided with a second high-pressure component and a seventh stop valve which are sequentially connected, the outlet of the seventh stop valve is connected with the inlet of the second pressure gauge, and the second high-pressure component is provided with an insulation detection module which is electrically connected.
Specifically, the outlet of the first pressure gauge is respectively connected with the inlets of the second stop valve, the third stop valve and the fourth stop valve; the outlet of the fourth stop valve is provided with a third high-pressure component and a sixth stop valve which are sequentially connected, the outlet of the sixth stop valve is connected with the inlet of the second pressure gauge, and the third high-pressure component is provided with an insulation detection module which is electrically connected.
Specifically, the outlet of the first pressure gauge is respectively connected with the inlets of the second stop valve, the third stop valve, the fourth stop valve and the fifth stop valve; the outlet of the fifth stop valve is provided with a fourth high-voltage component and a sixth stop valve which are connected in sequence, the first high-voltage component, the second high-voltage component and the third high-voltage component are respectively and electrically connected with the fourth high-voltage component, and the fourth high-voltage component is provided with an insulation detection module which is electrically connected.
Specifically, the first high-voltage component, the second high-voltage component, the third high-voltage component and the fourth high-voltage component are respectively selected from one of an electronic water pump, a PTC heater, a DCDC and an air compressor, and the electronic water pump, the PTC heater, the air compressor and the insulation detection module are respectively and electrically connected with the DCDC.
More specifically, an insulation detection frock for fuel cell high voltage component includes: the device comprises a water supplementing tank, a deionizing tank, a first stop valve, a circulating water pump, a first pressure gauge, a second stop valve, a third stop valve, a fourth stop valve, a fifth stop valve, a sixth stop valve, a seventh stop valve, an eighth stop valve, a second pressure gauge, a high-voltage component, a conductivity meter, a ninth stop valve, a transparent pipe and an insulation detection module; the high-voltage component includes: the device comprises an electronic water pump, a PTC heater, a DCDC and an air compressor; the electronic water pump, the PTC heater and the air compressor are respectively and electrically connected with the DCDC, and the DCDC is electrically connected with the insulation detection module;
the water outlet of the water supplementing tank is provided with a deionizing tank, the deionizing tank is connected with the inlet of the circulating water pump through the first stop valve, the outlet of the circulating water pump is provided with the first pressure gauge, and the outlet of the first pressure gauge is respectively connected with the inlets of the second stop valve, the third stop valve, the fourth stop valve and the fifth stop valve;
the outlet of the second stop valve is provided with the electronic water pump and the eighth stop valve which are sequentially connected, the outlet of the third stop valve is provided with the PTC heater and the seventh stop valve which are sequentially connected, the outlet of the fourth stop valve is provided with the air compressor and the sixth stop valve which are sequentially connected, the outlet of the fifth stop valve is provided with the DCDC, the DCDC is connected with the inlet of the sixth stop valve, the inlet of the second pressure gauge is respectively connected with the outlet of the sixth stop valve, the outlet of the seventh stop valve and the outlet of the eighth stop valve, the outlet of the second pressure gauge is provided with the conductivity meter, the conductivity meter is connected with the water return port of the water supplementing tank through the transparent pipe, and the outlet of the conductivity meter is provided with the ninth stop valve.
Firstly, under the condition of no water, using an insulation detection module to perform dry insulation detection on a high-voltage component; specifically, the electronic water pump, the PTC heater, the air compressor and the insulation detection module are respectively and electrically connected in series with the DCDC through the high-voltage plug-in unit, the DCDC is detected independently when the insulation detection module detects, the electronic water pump, the PTC heater and the air compressor are sequentially and electrically connected in series with the DCDC through the high-voltage plug-in unit under the condition that the insulation is qualified, the insulation detection module is observed when the high-voltage plug-in unit of each high-voltage part is plugged into the DCDC, and the insulation failure of the newly-inserted high-voltage part is indicated if the integral insulation resistance value of the insulation detection module is unqualified.
The deionized water is driven by a circulating water pump to finish the cleaning of the water channels of all parts;
starting a circulating water pump and stop valves at the front and rear ends of each high-pressure part to finish water adding and air exhausting;
then, the insulation detection module is used again for wet insulation detection, specifically, the electronic water pump, the PTC heater, the air compressor and the insulation detection module are respectively and electrically connected with the DCDC in series through the high-voltage plug-in unit, the DCDC is detected independently when the insulation detection module detects, the electronic water pump, the PTC heater and the air compressor are sequentially and electrically connected with the DCDC in series through the high-voltage plug-in unit under the condition that the insulation is qualified, the insulation detection module is observed when the high-voltage plug-in unit of each high-voltage part is plugged into the DCDC, and the insulation failure of the newly-plugged high-voltage part is indicated if the integral insulation resistance value of the high-voltage part is failed.
Deionized water is driven by a circulating water pump to pass through the deionized water tank, the first stop valve, the first pressure gauge, the second stop valve, the high-pressure component, the eighth stop valve, the second pressure gauge and the conductivity meter to the ninth stop valve.
And when the indication of the conductivity meter does not reach the standard, opening a ninth stop valve to drain at a low point, and after the indication of the conductivity meter reaches the standard, closing the ninth stop valve to finish the cleaning of the water channel of each part.
The judgment standard for the completion of water addition and air discharge is to observe that no obvious bubbles exist in the transparent tube.
The utility model provides an insulation detection tool for a high-voltage component of a fuel cell, which takes a low-voltage electronic water pump as the power of water circulation of the whole high-voltage component insulation detection tool, and can regulate and control the water flow of each branch by utilizing a stop valve of each branch; the water outlet of the deionized water tank is provided with a deionized water tank, a digital display conductivity meter is arranged at a tail water outlet, when the conductivity does not reach the standard, the opening of a stop valve at the water outlet of the tail end low point is regulated to carry out water discharge flushing, after the conductivity reaches the standard, water is added and air is discharged, the air discharge condition can be observed from a transparent pipe beside the water return port of the water tank, and after no obvious bubble exists, an insulation detection module is adopted to carry out on-line wet insulation detection on a plurality of high-voltage components simultaneously, namely, the cleaning of the water channels of all the high-voltage components is realized in the insulation detection process. The circulating water pump drives circulating water to enable each high-pressure part to be in a wet state, and then the insulation detection module is adopted to detect whether the insulation is qualified or not in real time, so that the insulation resistance of a plurality of high-pressure parts can be detected efficiently and simultaneously.
Drawings
The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the disclosure.
FIG. 1 shows an insulation detection tool for a high voltage component of a fuel cell in an embodiment of the utility model;
reference numerals: the device comprises a 1-water supplementing tank, a 2-deionizing tank, a 3-first stop valve, a 4-circulating water pump, a 5-first pressure gauge, a 6-second stop valve, a 7-third stop valve, an 8-fourth stop valve, a 9-fifth stop valve, a 10-electronic water pump, an 11-PTC heater, a 12-DCDC, a 13-air compressor, a 14-sixth stop valve, a 15-seventh stop valve, a 16-eighth stop valve, a 17-second pressure gauge, an 18-conductivity meter, a 19-ninth stop valve, a 20-transparent pipe and a 21-insulation detection module.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While embodiments of the present disclosure are illustrated in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The term "comprising" and variations thereof as used herein means open ended, i.e., "including but not limited to. The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "connected," "coupled," and "connected" refer to either direct or indirect connection or communication through other components. The terms "first," "second," and the like, may refer to different or the same object, but do not directly indicate a difference in order or importance. Other explicit and implicit definitions are also possible below.
Abbreviations and key term definitions of the present disclosure:
a fuel cell: a chemical device for directly converting chemical energy of hydrogen fuel into electric energy.
Hydrogen fuel cell stack: the place where the electrochemical reaction occurs is a core component of the hydrogen fuel cell system, which maintains the energy output process of the whole fuel cell system.
A fuel cell system: the power generation system is composed of a fuel cell stack as a core, a fuel supply and circulation system, an oxidant supply system, a water/heat management system, a control system and the like.
Insulation detection: the dielectric strength of the insulation structure of the electrical equipment is detected before the high-voltage component is assembled to the fuel cell system, so as to check whether the insulation index of the electrical equipment or the circuit meets the requirement or not, and prevent dangerous accidents caused by short circuit due to the assembly of the high-voltage component with unqualified insulation to the fuel cell system.
High-pressure component: the electric parts in the fuel cell system which need high-voltage driving mainly comprise an electronic water pump, a PTC heater, DCDC, an air compressor and the like.
Electronic water pump: the flow rate of the cooling liquid is regulated by regulating the rotation speed of the impeller, so that the working temperature of the fuel cell system is always in a proper interval.
PTC heater: the heater adopts PTC ceramic heating elements with small thermal resistance and high heat exchange efficiency to realize a heating function, and can heat cooling liquid of a fuel cell system to realize low-temperature cold start.
DCDC: the device for converting a dc power supply of a certain voltage class (high voltage or low voltage) into a dc power supply of another voltage class (low voltage or high voltage), in short, is a step-up or step-down device for a dc power supply.
Air compressor: the air is pressurized to provide gas with proper pressure for the fuel cell, different operation conditions of the fuel cell system require different currents to be generated by the electric pile, the air and hydrogen entering the electric pile are controlled by adjusting the current, and the air compressor plays a role in adjusting the air quantity entering the electric pile.
And (3) a circulating water pump: and a water pump for providing driving force for the whole insulation detection tool water circulation.
As shown in fig. 1, the utility model provides an insulation detection tool for a high-voltage component of a fuel cell;
comprising the following steps: the system comprises a water supplementing tank 1, a deionizing tank 2, a first stop valve 3, a circulating water pump 4, a first pressure gauge 5, a second stop valve 6, a third stop valve 7, a fourth stop valve 8, a fifth stop valve 9, an electronic water pump 10, a PTC heater 11, a DCDC12, an air compressor 13, a sixth stop valve 14, a seventh stop valve 15, an eighth stop valve 16, a second pressure gauge 17, a conductivity meter 18, a ninth stop valve 19, a transparent pipe 20 and an insulation detection module 21; the electronic water pump 10, the PTC heater 11 and the air compressor 13 are respectively and electrically connected with the DCDC12, and the DCDC12 is electrically connected with the insulation detection module 21.
The water outlet of the water supplementing tank 1 is provided with a deionizing tank 2, the deionizing tank 2 is connected with the inlet of a circulating water pump 4 through a first stop valve 3, the outlet of the circulating water pump 4 is provided with a first pressure gauge 5, and the outlet of the first pressure gauge 5 is respectively connected with the inlets of a second stop valve 6, a third stop valve 7, a fourth stop valve 8 and a fifth stop valve 9;
the outlet of the second stop valve 6 is provided with an electronic water pump 10 and an eighth stop valve 16 which are sequentially connected, the outlet of the third stop valve 7 is provided with a PTC heater 11 and a seventh stop valve 15 which are sequentially connected, the outlet of the fourth stop valve 8 is provided with an air compressor 13 and a sixth stop valve 14 which are sequentially connected, the outlet of the fifth stop valve 9 is provided with a DCDC12 and a sixth stop valve 14 which are sequentially connected, the inlet of a second pressure gauge 17 is respectively connected with the outlet of the sixth stop valve 14, the outlet of the seventh stop valve 15 and the outlet of the eighth stop valve 16, the outlet of the second pressure gauge 17 is provided with a conductivity meter 18, the conductivity meter 18 is connected with a water return port of the water supplementing tank 1 through a transparent pipe 20, and the outlet of the conductivity meter 18 is provided with a ninth stop valve 19.
The whole detection process comprises four steps of dry insulation detection, water channel cleaning, water adding and air exhausting, and wet insulation detection;
the method comprises the steps of dry insulation detection, firstly, using an insulation detection module 21 to carry out dry insulation detection on an electronic water pump 10, a PTC heater 11, a DCDC12 and an air compressor 13 under the condition of no water passing, specifically, respectively and electrically connecting the electronic water pump 10, the PTC heater 11, the air compressor 13 and the insulation detection module 21 with the DCDC in series through high-voltage plug-ins, firstly, independently detecting the DCDC when the insulation detection module 21 detects, sequentially and electrically connecting the electronic water pump 10, the PTC heater 11 and the air compressor 13 with the DCDC12 in series through the high-voltage plug-ins under the condition that the insulation is qualified, and observing the insulation detection module 21 when the high-voltage plug-ins of each high-voltage component are plugged into the DCDC12, and if the whole insulation resistance is unqualified, indicating that the newly inserted high-voltage component is unqualified;
the water channel is cleaned, deionized water passes through a deionizing tank 2, a first stop valve 3, a first pressure gauge 5, a second stop valve 6, a third stop valve 7, a fourth stop valve 8, a fifth stop valve 9, an electronic water pump 10, a PTC heater 11, a DCDC12, an air compressor 13, a sixth stop valve 14, a seventh stop valve 15, an eighth stop valve 16, a second pressure gauge 17 and a conductivity meter 18 from a water supplementing tank 1 under the driving of a circulating water pump 4, when the indication of the conductivity meter 18 does not reach the standard, a ninth stop valve 19 is opened for low-point water drainage, and after the indication of the conductivity meter 18 reaches the standard, the ninth stop valve 19 is closed, so that the cleaning of the water channel of each part is completed;
the water is added for exhausting, the stop valves at the front and rear ends of the circulating water pump and each high-pressure part are opened, and the water adding and the exhausting are completed when no obvious bubbles exist in the transparent pipe 20;
wet insulation detection is then performed again by using the insulation detection module 21, specifically, the electronic water pump 10, the PTC heater 11, the air compressor 13 and the insulation detection module 21 are respectively and electrically connected in series with the DCDC through the high-voltage plug-in unit, the DCDC is detected separately when the insulation detection module 21 detects, the electronic water pump 10, the PTC heater 11 and the air compressor 13 are sequentially and electrically connected in series with the DCDC12 through the high-voltage plug-in unit under the condition that the insulation is qualified, the insulation detection module 21 is observed when the high-voltage plug-in unit of each high-voltage component is plugged into the DCDC12, and if the whole insulation resistance value of the whole insulation detection module is unqualified, the newly plugged high-voltage component is unqualified.
The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of the prior art, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (6)
1. A insulating detection frock for fuel cell high voltage component, its characterized in that includes: the device comprises a water supplementing tank, a deionizing tank, a first stop valve, a circulating water pump, a first pressure gauge, a second stop valve, a first high-pressure component, a conductivity meter, an eighth stop valve, a ninth stop valve, an insulation detection module and a transparent pipe; the first high-voltage component is provided with an insulation detection module which is electrically connected;
the water outlet of the water supplementing tank is provided with a deionizing tank, the deionizing tank is connected with the inlet of the circulating water pump through the first stop valve, the outlet of the circulating water pump is provided with the first pressure gauge, the outlet of the first pressure gauge is connected with the inlet of the second stop valve, and the outlet of the second stop valve is provided with the first high-pressure component, the eighth stop valve, the second pressure gauge and the conductivity meter which are connected in sequence;
the outlet of the conductivity meter is provided with a ninth stop valve, the conductivity meter is connected with the water return port of the water supplementing tank, and a transparent pipe is arranged on a connecting pipeline between the conductivity meter and the water supplementing tank.
2. The insulation detection tool for the high-voltage component of the fuel cell according to claim 1, wherein the outlet of the first pressure gauge is respectively connected with the inlets of the second stop valve and the third stop valve; the outlet of the third stop valve is provided with a second high-pressure component and a seventh stop valve which are sequentially connected, the outlet of the seventh stop valve is connected with the inlet of the second pressure gauge, and the second high-pressure component is provided with an insulation detection module which is electrically connected.
3. The insulation detection tool for the high-voltage component of the fuel cell according to claim 2, wherein the outlet of the first pressure gauge is respectively connected with the inlets of the second stop valve, the third stop valve and the fourth stop valve; the outlet of the fourth stop valve is provided with a third high-pressure component and a sixth stop valve which are sequentially connected, the outlet of the sixth stop valve is connected with the inlet of the second pressure gauge, and the third high-pressure component is provided with an insulation detection module which is electrically connected.
4. The insulation detection tool for the high-voltage component of the fuel cell according to claim 3, wherein the outlet of the first pressure gauge is respectively connected with the inlets of the second stop valve, the third stop valve, the fourth stop valve and the fifth stop valve; the outlet of the fifth stop valve is provided with a fourth high-voltage component and a sixth stop valve which are connected in sequence, the first high-voltage component, the second high-voltage component and the third high-voltage component are respectively and electrically connected with the fourth high-voltage component, and the fourth high-voltage component is provided with an insulation detection module which is electrically connected.
5. The insulation detection tool for the high-voltage component of the fuel cell according to claim 4, wherein the first high-voltage component, the second high-voltage component, the third high-voltage component and the fourth high-voltage component are respectively selected from one of an electronic water pump, a PTC heater, DCDC and an air compressor, and the electronic water pump, the PTC heater, the air compressor and the insulation detection module are respectively electrically connected with the DCDC.
6. The insulation detection tool for a high-voltage component of a fuel cell according to claim 1, comprising: the device comprises a water supplementing tank, a deionizing tank, a first stop valve, a circulating water pump, a first pressure gauge, a second stop valve, a third stop valve, a fourth stop valve, a fifth stop valve, a sixth stop valve, a seventh stop valve, an eighth stop valve, a second pressure gauge, a high-voltage component, a conductivity meter, a ninth stop valve, a transparent pipe and an insulation detection module; the high-voltage component includes: the device comprises an electronic water pump, a PTC heater, a DCDC and an air compressor; the electronic water pump, the PTC heater and the air compressor are respectively and electrically connected with the DCDC, and the DCDC is electrically connected with the insulation detection module;
the water outlet of the water supplementing tank is provided with a deionizing tank, the deionizing tank is connected with the inlet of the circulating water pump through the first stop valve, the outlet of the circulating water pump is provided with the first pressure gauge, and the outlet of the first pressure gauge is respectively connected with the inlets of the second stop valve, the third stop valve, the fourth stop valve and the fifth stop valve;
the outlet of the second stop valve is provided with the electronic water pump and the eighth stop valve which are sequentially connected, the outlet of the third stop valve is provided with the PTC heater and the seventh stop valve which are sequentially connected, the outlet of the fourth stop valve is provided with the air compressor and the sixth stop valve which are sequentially connected, the outlet of the fifth stop valve is provided with the DCDC, the DCDC is connected with the inlet of the sixth stop valve, the inlet of the second pressure gauge is respectively connected with the outlet of the sixth stop valve, the outlet of the seventh stop valve and the outlet of the eighth stop valve, the outlet of the second pressure gauge is provided with the conductivity meter, the conductivity meter is connected with the water return port of the water supplementing tank through the transparent pipe, and the outlet of the conductivity meter is provided with the ninth stop valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320030562.5U CN218974501U (en) | 2023-01-06 | 2023-01-06 | Insulation detection tool for high-voltage component of fuel cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320030562.5U CN218974501U (en) | 2023-01-06 | 2023-01-06 | Insulation detection tool for high-voltage component of fuel cell |
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| CN218974501U true CN218974501U (en) | 2023-05-05 |
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| CN202320030562.5U Active CN218974501U (en) | 2023-01-06 | 2023-01-06 | Insulation detection tool for high-voltage component of fuel cell |
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