60 results about "Electrolyte leakage" patented technology

The invention relates to the technical field of path planning, and discloses a path planning method and system of an AGV (Automatic Guided Vehicle) for a silver electrolysis process workshop. The method comprises the following steps: carrying out environment characteristic acquisition and electronic map construction on a silver electrolysis process workshop to obtain a silver electrolysis process workshop electronic map; calculating an initial optimal path of the AGV from the current position to the target workstation; detecting the actual driving resistance in the execution process of the initial optimal path to obtain a path correction parameter; performing local adjustment to obtain an energy-saving safe path; and in the process that the AGV executes the energy-saving safe path, the front moving obstacle and the electrolyte leakage area are monitored in real time, and a temporary detour path is generated. According to the application, the path planning is more suitable for the actual environment characteristics of the silver electrolysis workshop, the emergency situation of the silver electrolysis workshop can be timely handled, the equipment safety and the production continuity are guaranteed, the no-load rate of the AGV is reduced, and the overall logistics efficiency of the silver electrolysis workshop is improved.

The invention relates to the technical field of energy storage equipment, and discloses movable energy storage equipment based on a construction site, the movable energy storage equipment comprises a box body and a movable seat, an inclination angle adjusting assembly is arranged between the box body and the movable seat, the posture of the box body is sensed in real time through a gyroscope, a threaded rod is driven to adjust the supporting height, and the diagonal deformation of the box body is controlled to be smaller than or equal to 5 mm; a sliding groove and a connecting rod linkage mechanism are arranged in an installation barrel on the outer wall of the box body, a motor is matched to drive a rotating frame to achieve automatic winding and unwinding of a power line, cables are prevented from being scattered and damaged, a sensor set is arranged in the box body, temperature excursion and vibration interference are eliminated through a dynamic compensation algorithm, and the net weight is calculated and calibrated in real time. And electrolyte leakage or structural damage is judged in combination with leakage current monitoring. The problems that box deformation is out of control, cable management is disordered and hidden danger recognition is lagged under the complex terrain are solved, and the safety and reliability of equipment are improved.

The invention discloses a cold response PaIBH1 protein and application of a coding gene thereof in enhancing cold stress resistance of plants. The cold response PaIBH1 protein is a protein PaIBH1 with an amino acid sequence as shown in SEQ ID NO: 2. Experiments prove that the gene for coding the protein PaIBH1, namely the gene PaIBH1, is overexpressed in wild type arabidopsis thaliana, so that the cold resistance of the arabidopsis thaliana can be improved; the improvement of the cold resistance shows that after cold treatment, the fresh weight of the overground part is increased, the wilting rate is reduced, the leaf membrane damage and electrolyte leakage are reduced, the photosynthetic ability is improved, the membrane lipid peroxidation damage is relieved, the active oxygen scavenging ability is enhanced and / or the active oxygen accumulation in the plant body is reduced. Therefore, the protein PaIBH1 can improve the cold resistance of the plants. The method has a very wide application prospect in the aspect of cold-resistant genetic improvement of crops or pasture.

The invention provides a battery cell and electric equipment, a shell of the battery cell further comprises a first wall and a second wall which are oppositely arranged along the thickness direction of the battery cell, the first wall comprises a first main body wall and a first step wall, and the first step wall is sunken towards the direction close to the second wall relative to the first main body wall. The battery cell further comprises an electrode assembly and an electrode terminal, the electrode assembly is arranged in the shell, and the electrode assembly comprises a first pole piece and a second pole piece which are opposite in polarity. The electrode terminal is arranged on the first step wall and electrically connected with the first pole piece, and the thickness H0 of the first step wall meets the condition that H0 is smaller than or equal to 0.2 mm. The reinforcing structure is formed between the first main body wall and the first step wall, so that the possibility that the first step wall deforms after being stressed is low, the sealing effectiveness between the electrode terminal and the first step wall can be kept, the risk of electrolyte leakage is reduced, and the safety of the battery cell is improved.

The utility model relates to the technical field of electrolytic baths, and particularly discloses a sealing structure of water electrolysis hydrogen production equipment, which comprises a plurality of bipolar plates and a plurality of diaphragms, the diaphragms and the bipolar plates are arranged in a staggered manner, and sealing gaskets are arranged between the diaphragms and the adjacent bipolar plates in an abutting manner. A first caulking groove and a second caulking groove are formed in the two end faces of the bipolar plate respectively, a first sealing ring is embedded in the first caulking groove, a second sealing ring is embedded in the second caulking groove, and the first sealing ring and the second sealing ring abut against the adjacent sealing gaskets respectively. The sealing ring is additionally arranged between the sealing gasket and the bipolar plate, so that the sealing performance between the bipolar plate and the sealing gasket can be effectively enhanced, and electrolyte leakage is prevented.

The invention relates to a method for battery leak detection. The present invention relates in particular to a method for detecting electrolyte leaks in a battery in addition to quantifying and locating said leaks. The invention also relates to a method for battery leak detection by means of the leak detection tag. The above mentioned method relates to a self-powered leak detection method, wherein the power of the method is driven by an electrolyte leak and at least two electrodes of a leak detection tag.

This invention is the first to clone the SLAH1 gene from the root system of cowpea. Studies show that this gene can significantly enhance the plant's tolerance to stresses such as high salt content, promote plant growth, increase root length, increase plant biomass, enhance photosynthetic rate and relative chlorophyll content, and reduce electrolyte leakage rate and leaf drop rate. Transgenic soybeans with the SLAH1 gene show significantly enhanced salt tolerance, and hold promise for developing salt-tolerant transgenic soybean varieties for cultivation in saline-alkali land. This invention provides a new candidate gene for research on improving plant stress resistance, promoting plant growth, and altering plant phenotypes.

The embodiment of the application provides a battery monomer, a battery device and a power utilization equipment, and relates to the technical field of batteries. The battery monomer comprises a shell, an electrode assembly, a protective film, a pressure relief mechanism and an electrolyte detection piece. The shell is provided with a first wall, and the first wall is provided with a pressure relief hole. The electrode assembly is installed in the interior of the shell. The protective film is located on the surface of the first wall away from the electrode assembly and covers the pressure relief hole. The protective film is configured to be at least partially transparent. The pressure relief mechanism is installed in the pressure relief hole. The electrolyte detection piece is installed in the pressure relief hole and located between the protective film and the pressure relief mechanism. The electrolyte detection piece is at least partially arranged to face the transparent part of the protective film and is configured to change color after contacting the electrolyte. The application can accurately find the state of electrolyte leakage caused by damage and failure of the pressure relief mechanism, and improve the accuracy of damage detection of the pressure relief mechanism.

The utility model provides a batten structure of a quantitative acid adding battery cover of a lead-acid storage battery, which comprises a battery cover body and a plurality of groups of valve seat ports at the top of the battery cover body, and rubber cap valves are mounted at the tops of the valve seat ports; a pressing strip is arranged at the top of the valve seat opening, two sets of clamping grooves are formed in the outer side of a wall opening of the valve seat opening, two sets of clamping columns are connected to the top of the pressing strip in a penetrating mode, and clamping holes are formed in the tops of the inner walls of the two sets of clamping grooves; a plurality of limiting protruding blocks are arranged on the outer wall of the clamping column, a plurality of limiting sliding grooves are formed in the inner wall of the clamping hole, and a plurality of deflection clamping grooves are formed in the inner wall of the clamping hole. According to the quantitative acid adding battery cover pressing strip structure of the lead-acid storage battery, excessive acid adding of the battery is reduced through pressing fit of the valve seat opening and the pressing strip, full utilization of equipment is achieved, the rubber cap valve is used for sealing the battery, discharging water vapor, preventing electrolyte leakage and protecting the safety of the battery, normal operation of the battery is ensured, and the service life of the battery is prolonged.

This invention discloses a method for enhancing the high-temperature resistance of citrus through exogenous spraying of naringin, belonging to the field of agricultural technology. The method involves preparing naringin into a formulation and spraying it exogenously onto the leaves of citrus plants. Experiments show that after treatment with naringin, phenotypic damage such as wilting and curling of citrus seedling leaves under high-temperature stress is significantly alleviated; the maximum photochemical efficiency of photosystem II (Fv / Fm) is significantly increased; electrolyte leakage rate and malondialdehyde content are significantly reduced; and the accumulation of hydrogen peroxide and superoxide anions is effectively inhibited. This invention utilizes naturally sourced naringin to significantly enhance the tolerance of citrus to high-temperature stress through multiple mechanisms, including maintaining photosynthetic system function, protecting cell membrane integrity, inhibiting membrane lipid peroxidation, and scavenging reactive oxygen species. Furthermore, the method is simple to operate, environmentally friendly, and low-cost, making it suitable for stress-resistant citrus cultivation.

The application relates to the technical field of safety protection of electric ship power battery cabins, and discloses a double-layer aluminum alloy composite heat-insulating fireproof and explosion-proof structure of an electric ship power battery cabin. The battery cabin is composed of a composite bulkhead formed by a double-layer aluminum alloy shell and a sandwich inorganic filling layer, can significantly improve the fire resistance, heat insulation and energy absorption and buffering capacity of the battery cabin body, adopts an independent and separated battery module bin, the formed cabin separation structure can effectively limit the abnormal spread of a single module bin to adjacent module bins, water mist can be sprayed into the cabin in the initial stage of thermal runaway through active water injection, the temperature is reduced, oxygen is isolated, and the spread of fire is inhibited, the fire-fighting waste liquid and electrolyte leakage in the cabin can be quickly discharged through the liquid discharge structure after an accident, the secondary damage risk is reduced, a multi-parameter monitoring and electrically linked control type emergency treatment mode is adopted, the high-voltage circuit can be automatically cut off and the fire extinguishing and alarm functions can be started when an accident occurs, and emergency treatment of the battery cabin body accident can be completed in the first time.

The utility model relates to the technical field of battery processing, and relates to an electrolyte leakage detection system and a battery production system. The electrolyte leakage detection system comprises a liquid sensing piece and a monitoring device, the liquid sensing piece is arranged in the containing space, at least part of the liquid sensing piece surrounds a liquid related device in the containing space, and the liquid sensing piece is configured to be capable of detecting electrolyte leaked by the liquid related device and outputting a control signal; the monitoring device is in communication connection with the liquid sensing part, and the monitoring device is configured to be capable of receiving a control signal of the liquid sensing part so as to output a warning signal. According to the electrolyte leakage detection system provided by the embodiment of the invention, the electrolyte can be in contact with the liquid sensing piece and can be detected in time at the initial leakage stage by arranging the liquid sensing piece which at least partially surrounds the liquid relating device in the accommodating space.

The present invention discloses an all-solid-state electrochemical actuator and a preparation method thereof, which are used to solve the technical problems such as the large self-weight of the electrochemical actuator working in a liquid environment and the electrolyte leakage and evaporation of the electrochemical actuator working in a quasi-solid-state environment. An all-solid-state electrochemical reaction system is realized by preparing a driving material and a polyvinyl alcohol-sulfuric acid gel, and the assembly of the actuator is realized based on the interlayer van der Waals force formed during the pulsed laser deposition process and the super strong adhesiveness of the polyvinyl alcohol-sulfuric acid gel itself. The present invention proposes an all-solid-state electrochemical actuator that does not need to be immersed in electrolyte before use and does not need to add electrolyte during use, enriches the electrochemical driving technology, and broadens the development prospects of electrochemical actuators in research fields such as artificial muscle fibers, micro medical devices, and intelligent robots.

A first curved surface (41) that is convex toward the upper side in the axial direction and the outer side in the radial direction is provided at a corner part (40) on the upper side in the axial direction and the outer side in the radial direction of a sealing body (17). When t1 is defined as the maximum thickness in the axial direction of an outer portion (45) of the sealing body (17) located radially outward of a tip (15) on the opening side on an inner surface (65) of an exterior can (16) and t2 is defined as the maximum radius of curvature of a first curved surface (41) in an axial cross section, then t2 / t1 ≥1 / 2 is established. According to a battery (10) of the present disclosure, even if the thickness of a gasket (28) is increased in order to suppress electrolyte leakage, warping of the sealing body (17) is unlikely to occur.

The invention belongs to the technical field of in-situ Raman testing, and particularly discloses an electrochemical reaction tank for in-situ Raman testing and a use method thereof.The electrochemical reaction tank comprises a cathode chamber, a sealing ring is mounted in the cathode chamber, a cover plate is mounted on the cathode chamber, a first sealing gasket is embedded in the cover plate, and a second sealing gasket is mounted on the first sealing gasket. The window sealing cover, the quartz window and the annular sealing ring are tightly mounted on the cell cover to form an efficient sealing structure for an optical path, so that electrolyte leakage can be effectively avoided, the problems of equipment corrosion, experimental pollution and the like caused by electrolyte overflow are prevented, the safety of experimental operation is guaranteed, and meanwhile, the service life of the experimental device is prolonged. External impurities can be prevented from entering the device, the interference of the impurities on electrochemical reaction and Raman spectrum test is avoided, a pure and stable reaction environment is provided for experiments, and the accuracy and reliability of subsequent electrochemical reaction and spectrum monitoring are fundamentally ensured.

A pouch-type battery case according to the present invention comprises: a cup portion provided with an accommodating space in which an electrode assembly is accommodated; a terrace portion formed along the perimeter of the accommodation portion; and one or more gas discharge portions. The gas discharge portions are provided at one or more locations on the cup portion and the terrace portion, each of the gas discharge portions includes one or more through-holes and a gas-permeable film covering the through-holes, the gas-permeable film includes an adhesive resin layer and a permeable resin layer disposed on the adhesive resin layer, the gas-permeable film is sealed on the battery case, thus forming sealing regions around the through-holes, and each of the gas discharge portions has a water blocking index (WBI) of 2.0 to 10.5. The gas discharge portions that satisfy the water blocking index exhibit excellent performance in preventing water penetration from the outside and electrolyte leakage while continuously discharging gas, thereby improving the safety and lifespan of the pouch-type secondary battery.

This invention proposes a power battery casing and a secondary battery, belonging to the field of batteries. The casing includes a first casing wall and several second casing walls forming a casing. A pressure relief hole is provided on the first casing wall. A first boss protrudes into the casing from the first casing wall, and a second boss protrudes outward from the first boss. Alternatively, at least one first boss and one second boss protrude into the casing from the first casing wall, with the first and second bosses spaced apart. The pressure relief hole is located on one of the second bosses. This invention provides a first boss and a second boss with a height difference on the casing wall where the pressure relief hole is located, increasing the distance between the pressure relief device and the internal core of the battery and the external environment. This avoids the safety hazard of casing explosion due to the pressure relief device's inability to release pressure in time, and also mitigates the risk of electrolyte leakage due to damage to the pressure relief device caused by bumps and scratches caused by insufficient distance.

The invention provides a dual-electrode structure capable of stably, continuously and independently generating double bubbles and a preparation method. The dual-electrode structure comprises an external insulating tube, an electrode wire, an internal insulating tube, a wire and a sealing body, a first electrode wire is arranged in the internal insulating tube, a second electrode wire is arranged in the external insulating tube, the first electrode wire is parallel to the second electrode wire, the first ends of the first electrode wire and the second electrode wire are connected with a wire, and the second ends of the first electrode wire and the second electrode wire are flush with and sealed with the end face of the external insulating tube. A sealing body is arranged in a gap among the external insulating tube, the wire and the internal insulating tube at the first end; the first end of the internal insulating tube and the first end of the first electrode wire are arranged in the sealing body, and the two electrode wires are insulated in the external insulating tube; and micron-sized single bubbles are generated on the surface of the electrode, so that short circuit or corrosion caused by electrolyte leakage is prevented, generation of multiple bubbles on the surface of the electrode is eradicated fundamentally, it is guaranteed that the electrode only generates single bubbles at the same time, and the service life of the device is prolonged.

The thermal composite cover plate comprises a top cover and a pole assembly, a first through hole is formed in the surface of the top cover, and the top cover is provided with an outer side face and an inner side face; the pole assembly comprises an external pole and an internal pole, the external pole is attached to the outer side face of the top cover, a second through hole is formed in the surface of the external pole, and the second through hole and the first through hole are concentrically arranged; the built-in pole is provided with a sheet-shaped part and a protruding part arranged on the surface of the sheet-shaped part, the sheet-shaped part is attached to the inner side face of the top cover, the protruding part penetrates through the first through hole and the second through hole and is partially exposed outside, and the sheet-shaped part and the external pole jointly clamp the top cover so as to prevent the battery from leaking liquid. According to the technical scheme, high sealing performance is achieved, and electrolyte leakage is effectively prevented.

The utility model discloses a temperature-controllable and closed electrolytic cell for producing hydrogen by electrolyzing water, which is characterized in that an anode electrolytic cell clamp and a cathode electrolytic cell clamp ensure that an anode electrode, a diaphragm and a cathode electrode can be stably arranged in a closed cavity formed by the two clamps through an innovative anode groove and cathode convex groove design; and the problem of electrolyte leakage caused by poor fitting of the clamp is effectively avoided. In addition, the two types of clamps are integrated with an advanced control system which comprises an intuitive display and an accurate temperature control button. The temperature control system is installed on the back of the clamp, operation is convenient, the temperature in the electrolytic bath can be monitored in real time through a displayer, a control button allows a user to finely adjust the temperature and time according to experiment requirements, and therefore the electrolyte temperature in the water electrolysis hydrogen production process is accurately controlled. According to the integrated design, the structure of the experimental device is simplified, the production cost is remarkably reduced, and the efficiency and convenience of experimental operation are greatly improved.

The utility model relates to the technical field of flow battery electric piles, in particular to an electric pile end plate and an electric pile. The galvanic pile end plate is provided with a first compensation convex part and a second compensation convex part, the first compensation convex part is formed by protruding an area, corresponding to an electrode of a single battery, of the end plate towards the electrode direction, and the second compensation convex part is formed by protruding a central area of the first compensation convex part towards the electrode direction; and when the end plate clamps the single battery, the first compensation convex part and the second compensation convex part tend to be flat under the extrusion action of the electrode so as to compensate the outward elastic deformation of the end plate. According to the electric pile end plate and the electric pile, the double pre-convex structures are arranged on the end plate, outward elastic deformation of the end plate caused by an electrode surrounding area and a center area is compensated after the end plate is pressed, the sealing performance of a single battery is ensured after the end plate is assembled and in the operation process of the electric pile, and the risk of electrolyte leakage is reduced.

The utility model discloses a novel discharge hydrogen evolution and anode utilization rate testing device for a magnesium anode material. The novel discharge hydrogen evolution and anode utilization rate testing device comprises a base, a shell and a hydrogen collecting mechanism, the upper end of the shell is provided with a platinum wire electrode, and the platinum wire electrode extends downwards into the shell and is in contact with the electrolyte in the shell; a fixing hole is formed in the bottom of the shell, a metal sample to be tested is mounted in the fixing hole, and a sealing ring is arranged between the metal sample to be tested and the fixing hole; the hydrogen collecting mechanism comprises a support arranged in the shell and a funnel arranged on the support; the multiple sets of supports are arranged in the circumferential direction of the fixing hole. And the funnel is inversely buckled on the support. The testing device disclosed by the utility model not only can prevent electrolyte leakage, but also can accurately measure discharge hydrogen evolution and anode utilization rate of the magnesium anode material for the magnesium-air battery, and can simultaneously calculate metal particle falling weight loss in the discharge process.

The present application relates to a step-down lithium battery and a manufacturing method therefor. The step-down lithium battery comprises a circuit assembly, a plastic frame, a wound battery cell assembly, a first metal housing, a second metal housing, an insulating sealing member and an insulating sheath, the circuit assembly and the plastic frame being arranged in the first metal housing, the wound battery cell assembly being arranged in the second metal housing, the first metal housing and the second metal housing being fitted with each other vertically and being fixed by means of circumferential welding, the insulating sealing member being used for sealing the second metal housing, and the insulating sheath wrapping the first metal housing and the second metal housing. The present application uses the first metal housing and the insulating sealing member for completely sealing the upper end of the second metal housing, thus achieving good sealing performance, and effectively preventing electrolyte leakage; and only one steel housing layer is provided outside the wound battery cell assembly, such that compared with the prior art, one steel housing layer or soft housing layer is reduced, thus reducing the material cost. The connection strength of the first metal housing and the second metal housing is high, such that the first metal housing and the second metal housing are not prone to damage.

The invention discloses a safety performance evaluation method for a cooling liquid. The method comprises the following steps: measuring the flash point temperature and the ignition point temperature of the cooling liquid; respectively adjusting the measured flash point temperature and ignition point temperature of the cooling liquid to temperatures under standard atmospheric pressure to obtain a cooling liquid standard flash point temperature and a cooling liquid standard ignition point temperature corresponding to the cooling liquid; obtaining a mixture of the cooling liquid and the electrolyte; the flash point temperature and the ignition point temperature of the mixture are measured, the measured flash point temperature and the measured ignition point temperature of the mixture are adjusted to the temperature under the standard atmospheric pressure, and the mixture standard flash point temperature and the mixture standard ignition point temperature corresponding to the mixture are obtained; and evaluating the influence of electrolyte leakage on the safety performance of the cooling liquid based on the standard flash point temperature of the cooling liquid, the standard ignition point temperature of the cooling liquid, the standard flash point temperature of the mixture and the standard ignition point temperature of the mixture. According to the safety performance evaluation scheme of the cooling liquid, the influence of electrolyte leakage on the safety performance of the cooling liquid can be accurately evaluated, and an important technical support is provided for design and operation of an energy storage system.

The invention discloses a packaging film and an electrochemical device and an electronic device comprising the packaging film, and belongs to the technical field of energy storage.The packaging film comprises an insulating layer, a bonding layer, a composite layer and a heat sealing layer which are arranged in sequence, and a first blocking layer, a resin layer and a second blocking layer serve as the composite layer; the packaging film can be effectively prevented from being subjected to corner damage in a pit punching process, the risk of damage and deformation is reduced, the reliability and the sealing performance of a battery cell of an electrochemical device are effectively improved, meanwhile, the water vapor barrier property is effectively improved, the water vapor and oxygen permeability is effectively reduced, electrolyte seepage and battery cell corrosion of the electrochemical device are avoided, and the service life of the battery cell is prolonged. The reject ratio of the battery cell is obviously reduced, the production benefit is effectively improved, and the method has a wide application prospect.

This invention belongs to the field of electrochemical technology, specifically relating to a fully enclosed electrochemical device and its control method. The fully enclosed electrochemical device includes: a sealed housing, comprising a cathode bottom cover with cathode vent holes and an anode top cover with hydrophobic vent holes; a membrane electrode assembly fixed within an internal cavity, the edges of which are enclosed in a surrounding seal by insulating encapsulation ribs; the membrane electrode assembly comprises a cathode, a diaphragm, and an anode stacked sequentially, forming a tightly fitted structure with zero gaps. This invention uses insulating encapsulation ribs to surround and seal the zero-gap membrane electrode assembly, combined with a vent structure featuring a hydrophobic and breathable membrane. This macroscopically purely physical "fully enclosed" encapsulation design cuts off the macroscopic channels for electrolyte leakage, enabling the electrochemical device to adapt to extreme conditions such as tilting, inversion, and even microgravity, greatly expanding the application boundaries of deoxygenation / oxygenation equipment in aerospace and portable medical fields.

The present invention provides a battery cell capable of detecting electrolyte leakage, including: an electrode assembly; an electrolyte; a case 100 comprising a receptor 110 accommodating the electrode assembly and the electrolyte, and a sealing portion 120 provided at an edge of the receptor 110 and sealing the receptor 110 with the electrode assembly and the electrolyte accommodated therein; and a leakage sensor 200 coupled to and installed at the sealing portion 120 to detect the electrolyte leaking from the case 100. The leakage sensor 200 includes a conductor 220 constituting an electric circuit, at least a portion of the conductor 220 provided adjacent to and extending along an edge of the sealing portion 120. At least one of resistance, current and voltage of the electric circuit changes when leaked electrolyte contacts the conductor 220. Accordingly, a battery cell capable of detecting electrolyte leakage may be easily implemented at low cost with a simple configuration, and by detecting electrolyte leakage in real time quickly and accurately, accidents such as fire may be prevented in advance, and additional space for installing a leakage sensor may not be necessary.

The present invention relates to a sensor that is disposed inside a battery module or a battery pack and detects electrolyte leaking from a battery cell, and to a battery module or a battery pack that includes the sensor.

The invention discloses an electrolyte leakage detection system and method for a single battery. The electrolyte leakage detection system comprises a first gas sampling device and a second gas sampling device which are respectively provided with a closed chamber for accommodating a single battery to be detected; and the gas detection device is respectively connected with the two closed chambers and is configured to alternately and circularly detect sampling gas formed by the single batteries to be detected in the two closed chambers so as to determine whether electrolyte leakage occurs in the single batteries in the closed chambers. By arranging the first gas sampling device and the second gas sampling device, the gas detection device can detect the single batteries in the closed cavities of the first gas sampling device and the second gas sampling device alternately and circularly, so that the whole detection time is shortened by utilizing the feeding and discharging time of the single batteries, and the detection efficiency is improved. And the detection efficiency is improved.