CN115207402A - Humidification jar water charging system and fuel cell test equipment - Google Patents
Humidification jar water charging system and fuel cell test equipment Download PDFInfo
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- CN115207402A CN115207402A CN202210837680.7A CN202210837680A CN115207402A CN 115207402 A CN115207402 A CN 115207402A CN 202210837680 A CN202210837680 A CN 202210837680A CN 115207402 A CN115207402 A CN 115207402A
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- water
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- humidification
- water replenishing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04126—Humidifying
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0438—Pressure; Ambient pressure; Flow
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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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- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention relates to a humidification tank water charging system and fuel cell testing equipment, wherein the humidification tank water charging system comprises a water charging tank which is arranged in a sealing manner, the water charging tank comprises an air inlet and a water outlet, and deionized water is stored in the water charging tank; the gas cylinder is internally stored with protective gas, and the protective gas is conveyed to the gas inlet of the water replenishing tank at a constant pressure, so that the deionized water in the water replenishing tank flows to the humidifying tank from the water outlet of the water replenishing tank after being pressurized. The humidification tank water replenishing system and the fuel cell testing equipment provided by the invention can meet the constant-pressure water replenishing requirement of the humidification tank at low cost, can avoid air from being introduced into deionized water, and improve the safety of the testing process.
Description
Technical Field
The invention relates to the field of fuel cell testing, in particular to a humidification tank water replenishing system and fuel cell testing equipment.
Background
Currently, a Proton Exchange Membrane Fuel Cell (PEMFC) is a fuel cell, and is equivalent to a reverse device for water electrolysis in principle. The single cell consists of anode, cathode and proton exchange membrane, the anode is the place where hydrogen fuel is oxidized, the cathode is the place where oxidant is reduced, both electrodes contain catalyst for accelerating electrochemical reaction of the electrodes, and the proton exchange membrane is used as electrolyte. When working, the device is equivalent to a direct current power supply, the anode of the device is the negative pole of the power supply, and the cathode of the device is the positive pole of the power supply. The proton exchange membrane fuel cell has the advantages of high energy conversion efficiency, zero emission, low operation noise and the like, and is widely applied to new energy automobiles.
In the related art, in order to test the performance of the proton exchange membrane fuel cell, deionized water is required to humidify hydrogen and air, and the humidified hydrogen and air are respectively led to an anode runner and a cathode runner of the fuel cell to perform a related performance test, wherein a water pump is mostly adopted to supplement deionized water into a humidification tank to supplement water into a de-humidification tank.
However, when the hydrogen or air is humidified, it is necessary to ensure that the water pressure of the humidification tank is stabilized within a preset range for a long time, the water pressure of the water replenishing port of the humidification tank is not too large or too small, the humidification effect of the humidification tank is not good due to the too large water replenishing port, and if the water replenishing port is too small, the water replenishing may be untimely or even the deionized water may flow back due to the pressure difference. Need adopt constant voltage moisturizing pump to the moisturizing of humidification jar in order to guarantee moisturizing pressure stability, however current constant voltage moisturizing pump need last operation just can realize the constant voltage moisturizing, can cause the test cost to increase by a wide margin. Meanwhile, the water is supplied to the humidification tank through the water pump, and air can be introduced into the humidification tank to be mixed with hydrogen in the water supply process, so that accidents such as hydrogen explosion and the like can be caused.
Disclosure of Invention
The embodiment of the invention provides a humidification tank water replenishing system and fuel cell testing equipment, and aims to solve the problems that low-power-consumption constant-pressure water replenishing cannot be realized in a humidification tank water replenishing process in the related technology, and air is possibly introduced in the water replenishing process to cause hydrogen explosion.
In a first aspect, a humidification tank water charging system is provided, comprising: the water replenishing tank is arranged in a sealing manner and comprises an air inlet and a water outlet, and deionized water is stored in the water replenishing tank; and the gas cylinder is internally stored with protective gas, and the protective gas is conveyed to the gas inlet of the water replenishing tank at a constant pressure, so that deionized water in the water replenishing tank flows to the humidification tank from the water outlet of the water replenishing tank after being pressurized.
In some embodiments, a pressure reducing valve is arranged between the gas cylinder and the gas inlet, and the protective gas is reduced to a preset constant pressure through the pressure reducing valve and flows to the gas inlet.
In some embodiments, the inlet of the refill tank is higher than the outlet.
In some embodiments, the water outlet is communicated with a solenoid valve, one side of the solenoid valve, which is far away from the water outlet, is used for communicating with the humidification tank, and a control port of the solenoid valve is used for being connected with a liquid level sensor of the humidification tank.
In some embodiments, the top of the water replenishing tank is further provided with an air and pressure relief opening.
In some embodiments, the water replenishing tank is provided with a liquid level display device, the liquid level display device is a transparent tube, one side of the liquid level display device extends into the water replenishing tank from the bottom of the water replenishing tank, and the other side of the liquid level display device extends out of the water replenishing tank.
In some embodiments, the shielding gas is nitrogen.
In some embodiments, a hand valve is disposed between the gas cylinder and the gas inlet.
In a second aspect, there is provided a fuel cell testing apparatus comprising: the humidifying tank water charging system; and the humidifying tank is communicated with the water outlet of the water replenishing tank.
In some embodiments, the fuel cell testing apparatus comprises two humidification tanks: and the two humidification tanks are communicated with the water outlet of the water replenishing tank, one humidification tank is used for humidifying hydrogen and guiding the hydrogen to an anode flow channel of a sample to be detected, and the other humidification tank is used for humidifying air and guiding the air to a cathode flow channel of the sample to be detected.
The technical scheme provided by the invention has the beneficial effects that:
the embodiment of the invention provides a humidification tank water replenishing system and fuel cell testing equipment. Through the protective gas of constant voltage input to and with the sealed setting of moisturizing case, can utilize the protective gas drive deionized water of constant voltage to press to the humidification jar, and can realize that moisturizing process deionized water pressure is invariable, the pressure of deionized water is too high or crosses lowly when avoiding the moisturizing, simultaneously, owing to pressurize in to the moisturizing case through the protective gas, avoid introducing the air in to deionized water through water pump water, improved fuel cell test process's security. Therefore, the constant-pressure water replenishing of the humidifying tank can be met at low cost, air can be prevented from being introduced into deionized water, and the safety of the testing process is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a framework of a fuel cell testing apparatus according to an embodiment of the present invention.
In the figure:
1. a gas cylinder;
2. a water replenishing tank; 21. an air inlet; 22. a water outlet; 23. an exhaust pressure relief port; 24. a liquid level display device; 25. a water inlet;
3. a humidifying tank;
4. a pressure reducing valve;
5. an electromagnetic valve;
6. a hand valve;
7. a sample to be tested; 71. an anode flow channel; 72. and a cathode flow channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The embodiment of the invention provides a humidification tank water replenishing system and fuel cell testing equipment, which can solve the problems that water cannot be replenished to a low-power constant-pressure manner in the related art, and hydrogen is exploded due to the possibility of introducing air in the water replenishing process.
Referring to fig. 1, for a humidification tank water charging system provided in an embodiment of the present application, the humidification tank water charging system includes: the water replenishing device comprises a water replenishing tank 2 which is arranged in a sealing mode, wherein the water replenishing tank 2 comprises an air inlet 21 and a water outlet 22, and deionized water is stored in the water replenishing tank 2; the gas cylinder 1 stores shielding gas in the gas cylinder 1, and the shielding gas is conveyed to the gas inlet 21 of the water replenishing tank 2 at a constant pressure, so that the deionized water in the water replenishing tank 2 flows to the humidifying tank 3 from the water outlet 22 of the water replenishing tank 2 after being pressurized. Through 2 sealed settings with moisturizing tank, and with the input moisturizing tank of protective gas constant voltage 2, the pressure of accessible protective gas presses the pressure of deionized water to humidification jar 3, through filling the protective gas in the moisturizing tank 2 to being equipped with deionized water, can press the deionized water to humidification jar 3 in by the delivery port 22 of moisturizing tank 2, realize the moisturizing to humidification jar 3, owing to extrude the deionized water to moisturizing tank 2 through protective gas and non-air, avoid air oxygen to flow to humidification jar 3 in the in-process of moisturizing, the explosion that leads to has avoided the hydrogen mixture in oxygen and the humidification jar 3, the security of equipment has been improved. Meanwhile, as the deionized water is pressed into the humidifying tank 3 through the protective gas, the gas dissolved in the deionized water is removed, and excessive protective gas is not consumed. Compare through water pump moisturizing, through gaseous pressurized-water, can reduce the energy resource consumption of moisturizing in-process, and build better test range. And since the shielding gas is supplied to the inlet 21 of the water replenishment tank 2 at a constant pressure, a constant pressure can be applied to the deionized water to achieve the stabilization of the pressure of the replenishment. The phenomenon that the pressure of deionized water is overhigh in the water replenishing process, so that the internal pressure difference of the fuel cell is overhigh instantaneously, and the proton exchange membrane is damaged is avoided; the pressure of the deionized water is too low in the water replenishing process, the backflow of the deionized water is avoided, and hydrogen is dissipated from the water replenishing port of the humidifying tank 3. In the embodiment, the pressure of the shielding gas is adjusted by arranging the pressure reducing valve 4 between the gas cylinder 1 and the water replenishing tank 2, so that the constant of the pressure of the shielding gas is realized, and in other embodiments, the opening degree of the outlet of the gas cylinder 1 can be controlled by combining the pressure of the shielding gas, so that the pressure of the shielding gas is controlled. In this embodiment, the water supply tank 2 is a sealed tank body made of stainless steel, and the pressure bearing of the water supply tank 2 is greater than 4MPa so as to prevent the water supply tank 2 from leaking during the pressurizing and water supplying processes.
Referring to fig. 1, in some alternative embodiments, a pressure reducing valve 4 is disposed between the gas cylinder 1 and the gas inlet 21, and the shielding gas is reduced to a preset constant pressure by the pressure reducing valve 4 and flows to the gas inlet 21. That is, the pressure of the shielding gas is adjusted by the pressure reducing valve 4, so that the pressure of the shielding gas to the water replenishing tank 2 is stabilized within a certain range, in this embodiment, the range before the pressure reducing valve 4 reduces the pressure is 20 to 25MPa, and the range after the pressure reducing valve 4 reduces the pressure is 1 to 2MPa. In other embodiments, the pressure reducing valve 4 may be adjusted to reduce the pressure of the shielding gas to a suitable pressure value, so as to meet the water replenishing pressure requirements of the humidification tanks 3 with different specifications. The pressure of the protective gas is adjusted through the pressure reducing valve 4, and the water replenishing of the humidifying tank 3 can be realized by utilizing the pressure energy of the protective gas in the gas bottle 1 under the condition of not adopting external energy.
Referring to fig. 1, in some alternative embodiments, the air inlet 21 of the make-up water tank 2 is higher than the water outlet 22. Because the gas can be lighter than liquid, the gas protection gas can assemble at the top of moisturizing case 2 in leading to moisturizing case 2, and then extrudes moisturizing case 2 with the deionized water in moisturizing case 2. Since the air inlet 21 of the water replenishing tank 2 is higher than the water outlet 22, the protective gas can be prevented from directly flowing from the water outlet 22 to the humidifying tank 3. In this embodiment, the air inlet 21 is disposed at the top of the makeup tank 2. In other embodiments, the air inlet 21 may be disposed at the side of the refill tank 2.
Referring to fig. 1, in some alternative embodiments, the water outlet 22 is communicated with a solenoid valve 5, a side of the solenoid valve 5 away from the water outlet 22 is used for communicating with the humidification tank 3, and a control port of the solenoid valve 5 is used for being connected with a liquid level sensor of the humidification tank 3. That is to say, the outflow of accessible solenoid valve 5 control deionized water because the control mouth of solenoid valve 5 links to each other with humidification tank 3's level sensor, can detect the liquid level of deionized water in humidification tank 3 through level sensor, and whether the control is to humidification tank 3 moisturizing. In this embodiment, one water outlet 22 is communicated with two humidification tanks 3, and one electromagnetic valve 5 is provided for each humidification tank 3 to independently control the water supplement of each water supplement path. The water can be separately supplied to one humidification tank 3.
Referring to fig. 1, in some preferred embodiments, the top of the refill tank 2 is further provided with an air vent 23. Can emit high-pressure gas when moisturizing case 2 is in high-pressure state through pressure relief vent 23, in this embodiment, pressure relief vent 23 sets up in the top of moisturizing case 2, can reduce the loss of deionized water at carminative in-process. Wherein, can set up the baroceptor at the pressure release mouth 23 that exhausts, and the pressure that the atmospheric pressure when moisturizing box 2 inside is higher than predetermineeing the vapour-pressure type and opens pressure release mouth 23 and exhaust the pressure release. The air discharge/pressure release port 23 may also be used for releasing pressure during water supply to the water supply tank 2. In this embodiment, the water replenishing tank 2 is provided with a water inlet 25, and deionized water can be replenished into the water replenishing tank 2 through the water inlet 25. Wherein the water inlet 25 is arranged at the top of the replenishing water tank 2.
Referring to fig. 1, in some alternative embodiments, the water replenishing tank 2 is provided with a liquid level display device 24, the liquid level display device 24 is a transparent tube, one side of the liquid level display device 24 extends into the water replenishing tank 2 from the bottom of the water replenishing tank 2, and the other side of the liquid level display device 24 extends out of the water replenishing tank 2. That is, the current liquid level of the refill tank 2 can be read by the liquid level display device 24. Conveniently know the surplus of the deionized water in moisturizing case 2, because liquid level display device 24 is the hyaline tube, can audio-visually know the current liquid level height of moisturizing case 2, can all communicate with each other with moisturizing case 2 with liquid level display device 24's both ends to avoid hyaline tube and outside air intercommunication, avoid melting into the deionized water with the oxygen in the air.
Preferably, the protective gas is nitrogen. The nitrogen has the advantages of no active wave in chemical property, low cost and no explosion caused by reaction with hydrogen. In this example, the shielding gas used was high-purity nitrogen having a purity of 99.999%. Noble gases may also be used as shielding gases.
Referring to fig. 1, in some alternative embodiments, a hand valve 6 is provided between the gas cylinder 1 and the gas inlet 21. The on-off of the gas cylinder 1 and the gas inlet 21 can be controlled by the hand valve 6, and the water replenishing tank 2 is prevented from being communicated with the atmosphere during ventilation.
An embodiment of the present invention further provides a fuel cell testing apparatus, where the fuel cell testing apparatus includes: the humidification tank water replenishing system comprises a humidification tank 3, wherein the humidification tank 3 is communicated with a water outlet 22 of a water replenishing tank 2. For 3 moisturizing of humidification jar through humidification jar water charging system, can realize the moisturizing of constant voltage, and pressurize the deionized water through the protective gas at the moisturizing in-process, can not introduce the air in the deionized water and lead to the hydrogen explosion.
Referring to fig. 1, preferably, the fuel cell testing apparatus includes two humidification tanks 3: the two humidification tanks 3 are communicated with the water outlet 22 of the water replenishing tank 2, one of the humidification tanks 3 is used for humidifying hydrogen and guiding the hydrogen to the anode flow channel 71 of the sample 7 to be measured, and the other humidification tank 3 is used for humidifying air and guiding the air to the cathode flow channel 72 of the sample 7 to be measured. That is, the water outlet 22 of the water replenishment tank 2 is connected to both humidification tanks 3 at the same time, and since the pressure in the water replenishment tank 2 is constant, the pressure of deionized water to be replenished to both humidification tanks 3 is also constant. The deionized water-humidified hydrogen gas is led through the anode flow channel 71 to the sample 7 to be measured, and the deionized water-humidified air is led through the cathode flow channel 72 to the sample 7 to be measured. The test of the sample 7 to be tested can be completed.
The principle of the humidification tank water replenishing system and the fuel cell testing equipment provided by the embodiment of the invention is as follows:
protection gas through 21 input constant voltages of air inlet to moisturizing case 2, in order to extrude the 22 flow direction humidification jars 3 of delivery port with the deionized water extrusion in the moisturizing case 2, carry out the moisturizing to humidification jar 3, because protection gas is defeated to moisturizing case 2 for the constant voltage, and moisturizing case 2 is sealed setting, the protection gas of constant voltage can apply invariable pressure to the deionized water in the moisturizing case 2, in order to realize that deionized water constant voltage flows to humidification jar 3, because realize the pressurization through gas cylinder 1, compare the water pump moisturizing and do not need external energy can realize long-time constant voltage moisturizing, energy resource consumption has been reduced. Simultaneously because through in the protective gas input moisturizing case 2, and moisturizing case 2 is sealed to be set up, can avoid the air admission moisturizing case 2 in, avoid the explosion that air and hydrogen mix and lead to take place. The safety of the water replenishing process is improved.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is noted that, in the present invention, relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A humidification tank water charging system, comprising:
the water replenishing device comprises a water replenishing tank (2) which is arranged in a sealing mode, wherein the water replenishing tank (2) comprises an air inlet (21) and a water outlet (22), and deionized water is stored in the water replenishing tank (2);
the gas cylinder (1) stores protective gas, and the protective gas is conveyed to the gas inlet (21) of the water replenishing tank (2) at a constant pressure, so that deionized water in the water replenishing tank (2) is pressurized and then flows to the humidifying tank (3) from the water outlet (22) of the water replenishing tank (2).
2. The humidification canister water refill system of claim 1, wherein:
a pressure reducing valve (4) is arranged between the gas cylinder (1) and the gas inlet (21), and the protective gas is reduced to a preset constant pressure through the pressure reducing valve (4) and flows to the gas inlet (21).
3. The humidification canister water refill system of claim 1, wherein:
and the air inlet (21) of the water replenishing tank (2) is higher than the water outlet (22).
4. The humidification canister water refill system of claim 1, wherein:
the water outlet (22) is communicated with an electromagnetic valve (5), one side, far away from the water outlet (22), of the electromagnetic valve (5) is used for being communicated with the humidifying tank (3), and a control opening of the electromagnetic valve (5) is used for being connected with a liquid level sensor of the humidifying tank (3).
5. The humidification canister water refill system of claim 1, wherein:
the top of the water replenishing tank (2) is also provided with an air exhaust and pressure relief opening (23).
6. The humidification canister water refill system of claim 1, wherein:
the water replenishing tank (2) is provided with a liquid level display device (24), the liquid level display device (24) is a transparent pipe, one side of the liquid level display device (24) is stretched into the water replenishing tank (2) from the bottom of the water replenishing tank (2), and the other side of the liquid level display device (24) stretches out of the water replenishing tank (2).
7. The humidification tank water replenishment system of claim 1, wherein:
the protective gas is nitrogen.
8. The humidification canister water refill system of claim 1, wherein:
a hand valve (6) is arranged between the gas cylinder (1) and the gas inlet (21).
9. A fuel cell testing apparatus, characterized by comprising:
the humidification tank water replenishment system of any one of claims 1 to 8;
the humidifying tank (3), the humidifying tank (3) is communicated with a water outlet (22) of the water replenishing tank (2).
10. A fuel cell test apparatus as claimed in claim 9, characterized in that the fuel cell test apparatus comprises two humidification tanks (3):
two humidification jar (3) all communicate with delivery port (22) of moisturizing case (2), one of them humidification jar (3) are used for humidifying hydrogen and lead the positive pole runner (71) of awaiting measuring sample (7) with hydrogen, and another humidification jar (3) are used for humidifying the air and lead the negative pole runner (72) of awaiting measuring sample (7) with the air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210837680.7A CN115207402A (en) | 2022-07-15 | 2022-07-15 | Humidification jar water charging system and fuel cell test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210837680.7A CN115207402A (en) | 2022-07-15 | 2022-07-15 | Humidification jar water charging system and fuel cell test equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115207402A true CN115207402A (en) | 2022-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210837680.7A Pending CN115207402A (en) | 2022-07-15 | 2022-07-15 | Humidification jar water charging system and fuel cell test equipment |
Country Status (1)
| Country | Link |
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| CN (1) | CN115207402A (en) |
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2022
- 2022-07-15 CN CN202210837680.7A patent/CN115207402A/en active Pending
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