Solid oxide energy conversion device integrated with double-specification battery piece

Abstract

The utility model relates to the technical field of battery testing, in particular to a solid oxide energy conversion device integrating double-specification battery pieces, which comprises a tubular heating furnace for a button battery piece and a heating electric furnace for a single battery piece, battery testing clamps are arranged in the tubular heating furnace and the heating electric furnace, and the gas side of an air electrode is communicated with the anode sides of the battery testing clamps; the fuel electrode gas side is connected with an inlet of the water vapor evaporator through a pipeline; outlets of the water vapor evaporators are respectively connected with cathode sides of the battery test fixtures; an outlet in the cathode side of the battery test fixture is sequentially connected with the condenser and the double-column AB switching silica gel / molecular sieve drying dehydrator; according to the utility model, experimental equipment integrating a button cell and a single cell is adopted, and various reaction performance tests of cells with various specifications and sizes and electrolysis and cells are realized through public electrochemical test power supply equipment, a water vapor evaporator, a fuel electrode gas side, an air electrode gas side, condensation drying equipment and the like; the system is high in integration and simple in structure.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, in particular to a solid oxide energy conversion device integrating dual-specification battery sheets. Background Art

[0002] Solid oxide fuel cell (SOFC) is a typical high-temperature fuel cell that can directly convert the chemical energy stored in the fuel into electrical energy at high temperatures (600-1000°C). It is a clean and efficient energy conversion device.

[0003] High-temperature solid oxide batteries consist of a porous anode, a cathode, and a dense solid oxide electrolyte between the two. Under high-temperature working conditions, the porous electrode has the function of gas mass transfer and the conduction of oxygen ions and electrons, while the solid electrolyte has the function of conducting oxygen ions and preventing gas transfer. Therefore, in the actual operation process, ensuring the independent sealing of the cathode and anode gases and the current collection of the two levels is a necessary condition to ensure the testing and operation of high-temperature solid oxide batteries, making it difficult to test single-chip batteries of different sizes through a single battery test mold.

[0004] For example, the Chinese patent with the authorization announcement number CN112968198B designs a reaction device that can simultaneously meet the requirements of button-type and tubular solid oxide fuel cells and solid oxide electrolytic cells. Through simple experimental tests, it can conduct preliminary screening of small-area electrode materials. It is also a test device that is currently widely used at home and abroad. Another Chinese patent with the authorization announcement number CN105449250B discloses a kilowatt-class reversible solid oxide fuel cell-electrolytic cell test system, which can be sized to 10*10cm according to needs. 2 -20*20cm 2 Testing of large-area battery-electrolyzer stacks.

[0005] It can be seen that the existing test devices have not yet found a test device that can simultaneously realize the performance evaluation of small disc batteries and large-area flat batteries. In the process of developing electrode materials for large-scale solid oxide fuel cells and electrolyzers, it is necessary to simultaneously conduct rapid performance screening of button batteries and stability evaluation under large-scale industrial application conditions. Therefore, the development of a high-temperature solid oxide battery test device that integrates two specifications and sizes of battery cells for converting chemical energy into electrical energy and / or converting electrical energy into chemical energy is an important basis for the research and development of a new generation of large-scale solid oxide fuel cell stacks and electrolyzer stacks. Utility Model Content

[0006] In order to overcome the problems existing in the prior art, the purpose of the utility model is to provide a solid oxide energy conversion device integrating dual-specification battery cells; to overcome the limitation that button cells and large-area single-chip batteries in existing battery testing devices are restricted to two sets of testing systems.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a solid oxide energy conversion device integrating dual-specification battery cells, comprising a tubular heating furnace for button battery cells, a heating electric furnace for single battery cells, a fuel electrode gas side, an air electrode gas side, a water vapor evaporator, a power supply, a double-column AB switching silica gel / molecular sieve drying and dehydrating device, and a condenser; the tubular heating furnace for button battery cells and the heating electric furnace for single battery cells are both provided with a battery test fixture, and the battery test fixture includes a cathode side and an anode side; the air electrode gas side is connected to the anode side;

[0008] The fuel electrode gas side is connected to the inlet of the water vapor evaporator through a pipeline; the inlet of the water vapor evaporator is also connected to a water vapor unit, and the outlet of the water vapor evaporator is respectively connected to the cathode side of the tubular heating furnace for button battery cells and the cathode side inlet of the battery test fixture in the heating furnace for single battery cells; the cathode side outlet of the battery test fixture in the heating furnace for single battery cells is sequentially connected to the condenser and the double-column AB switching silica gel / molecular sieve drying and dehydrating device;

[0009] The power source is electrically connected to the battery testing fixtures in the tubular heating furnace for button battery sheets and the heating electric furnace for single battery sheets respectively.

[0010] The utility model is further configured as follows: the fuel electrode gas side includes a plurality of steel cylinders, and the plurality of steel cylinders are connected to the water vapor evaporator through pipelines; the steel cylinders on the fuel electrode gas side store fuel electrode gas H 2 , CO 2 , CO or CH 4 In actual use, H 2 , CO 2 , CO, CH 4 One or more gases in water vapor are introduced into the solid oxide energy conversion device to participate in the reaction.

[0011] The utility model is further configured as follows: the air cathode gas side includes a plurality of steel cylinders, the plurality of steel cylinders are connected to the water vapor evaporator through pipelines, and the steel cylinders on the air cathode gas side store compressed air or oxygen. When actually used, the compressed air or oxygen is introduced into the solid oxide energy conversion device to participate in the reaction.

[0012] The utility model is further configured as follows: a nitrogen pipeline is connected in parallel to the fuel electrode gas side and the air electrode gas side, and the pipeline after the reaction is purged by nitrogen.

[0013] The utility model is further configured as follows: a mass flow controller is respectively arranged on the pipelines on the air electrode gas side and the fuel electrode gas side.

[0014] The utility model is further configured as follows: the water vapor unit includes a plunger pump and a water storage tank, one end of the plunger pump is connected to the water storage tank, and the other end is connected to the water vapor evaporator; the water in the water storage tank is high-purity deionized water. The high-purity deionized water is driven by the plunger pump and enters the water vapor evaporator to achieve water vaporization, providing a steam source; and finally enters the fuel electrode side of the test device.

[0015] The utility model is further configured as follows: the solid oxide energy conversion device also includes an electronic load, and the electronic load is electrically connected to the battery test fixture in the tubular heating furnace for button battery sheets and the heating electric furnace for single battery sheets respectively.

[0016] The utility model is further configured as follows: the solid oxide energy conversion device also includes a pressure device, which is arranged above the heating furnace for the single cell sheet, and includes a telescopic cylinder and a counterweight; the output end of the telescopic cylinder is connected to the counterweight, and the position of the counterweight matches the position of the battery test fixture in the heating furnace for the single cell sheet. In actual use, the output end of the telescopic cylinder drives the counterweight to press down the battery test fixture at the bottom to ensure better sealing of the battery.

[0017] The utility model is further configured as follows: a gas outlet is also provided on the anode side of the battery test fixture.

[0018] The utility model is further configured as follows: the solid oxide energy conversion device also includes a display screen and a control unit; the control unit is electrically connected to the display screen, a tubular heating furnace for button battery cells, a heating electric furnace for single battery cells, a plunger pump, a water vapor evaporator, a mass flow controller, a power supply, an electronic load and a pressure device respectively.

[0019] The touch panel of the display can be used to intelligently control and monitor gas flow, liquid flow rate, water vapor evaporator temperature, etc. at any time. At the same time, data can be recorded continuously for a long time, making the data obtained more accurate and easier to observe data changes.

[0020] In summary, the beneficial effects of the above technical solution of the utility model are as follows:

[0021] (1) The utility model integrates the experimental equipment of button batteries and single batteries, and can carry out two different experiments. In the same system, the material performance preliminary screening through simple button batteries and the performance and stability evaluation of industrial scale-up through large-area single-chip batteries can be realized.

[0022] (2) The utility model has a high system integration and a simple structure. It can realize the testing of battery cells of various specifications and sizes and various electrolytic and battery reaction performance tests through common electrochemical test power supply equipment, water vapor evaporator, fuel electrode gas side, air electrode gas side, gas flow control module and condensation drying equipment.

[0023] (3) The gas flow rate, liquid flow rate, water vapor evaporator temperature, etc. can be controlled and monitored through the touch panel of the display screen. At the same time, the data can be recorded continuously for a long time, making the data obtained more accurate and easier to observe data changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is a schematic structural diagram of the solid oxide battery testing device of the present invention.

[0026] Figure 2 This is a gas circuit schematic diagram applicable to the solid oxide battery testing device described in the embodiment.

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0028] 1. Tubular heating furnace for button cell; 2. Display screen; 3. Pressure device; 4. Plunger pump; 5. Power supply; 6. Electronic load; 7. Heating furnace for single cell; 8. Water vapor evaporator; 9. Double-column AB switching silica gel / molecular sieve drying and dehydrating device; 10. Condenser. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the following is a clear and complete description of the technical solution of the present invention in conjunction with the drawings of the present invention. Based on the embodiments of the present invention, other similar embodiments obtained by ordinary technicians in the field without creative work should all fall within the scope of protection of the present invention. In addition, the directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the creation of the present invention.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0031] The utility model is further described below in conjunction with the accompanying drawings and preferred embodiments.

[0032] Example:

[0033] like Figure 1-2 As shown, a preferred embodiment of the utility model is a solid oxide energy conversion device integrating dual-specification battery cells, including a tubular heating furnace 1 for button battery cells, a heating furnace 7 for single battery cells, a fuel electrode gas side, an air electrode gas side, a water vapor evaporator 8, a power supply 5, a double-column AB switching silica gel / molecular sieve drying and dehydrating device 9, and a condenser 10; the tubular heating furnace 1 for button battery cells and the heating furnace 7 for single battery cells are both provided with a battery test fixture, and the battery test fixture includes a cathode side and an anode side; the air electrode gas side is connected to the anode side; the anode side of the battery test fixture is also provided with a gas exhaust port. Combined with Figure 2 As shown, the anode side of the battery test fixture inside the tubular heating furnace 1 for button cells is connected to the anode side of the battery test fixture in the heating furnace 7 for single cells; the tubular heating furnace 1 for button cells shares the gas exhaust port of the battery test fixture in the heating furnace 7 for single cells.

[0034] The fuel electrode gas side is connected to the inlet of the water vapor evaporator 8 through a pipeline; the inlet of the water vapor evaporator 8 is also connected to a water vapor unit, and the outlet of the water vapor evaporator 8 is provided with a three-way valve, which is respectively connected to the inlet of the cathode side of the battery test fixture in the tubular heating furnace 1 for button cells and the heating furnace 7 for single cells; the outlet of the cathode side of the battery test fixture of the heating furnace 7 for single cells is connected to the condenser 10 and the double-column AB switching silica gel / molecular sieve drying and dehydrating device 9 in sequence. The outlet of the cathode side of the battery test fixture of the tubular heating furnace 1 for button cells is connected to the outlet of the cathode side of the battery test fixture of the heating furnace 7 for single cells.

[0035] The solid oxide energy conversion device also includes a pressure device 3, which is arranged above the heating furnace 7 for the single cell sheet, and the pressure device 3 includes a telescopic cylinder and a counterweight block; the output end of the telescopic cylinder is connected to the counterweight block, and the position of the counterweight block matches the position of the battery test fixture in the heating furnace 7 for the single cell sheet.

[0036] The power source 5 is electrically connected to the battery test fixtures in the button cell tube heating furnace 1 and the single cell heating furnace 7. The power source 5 is a constant current power source.

[0037] The small-area button cell test is performed by placing the button cell test fixture in a tubular heating furnace 1 for button cell and subjecting to programmed temperature control. The large-area single cell test is performed by placing the large-area single cell test fixture in a heating electric furnace 7 for single cell and subjecting to programmed temperature control. Preferably, when performing large-area single cell testing, the test fixture is pressurized by the top pressure device 3 to ensure better sealing of the battery.

[0038] The fuel electrode gas side includes a plurality of steel cylinders, which are connected to the water vapor evaporator 8 through pipelines; the steel cylinders on the fuel electrode gas side store fuel electrode gas H 2 , CO 2 , CO or CH 4 .

[0039] The air cathode gas side includes a plurality of steel cylinders, and the plurality of steel cylinders are connected to the water vapor evaporator 8 through pipelines. The steel cylinders on the air cathode gas side store compressed air or oxygen.

[0040] The fuel electrode gas side and the air electrode gas side are both connected to nitrogen in parallel through pipelines, and the pipelines after the reaction are purged by nitrogen. The pipelines on the air electrode gas side and the fuel electrode gas side are respectively provided with mass flow controllers.

[0041] The water vapor unit comprises a plunger pump 4 and a water storage tank. One end of the plunger pump 4 is connected to the water storage tank, and the other end is connected to the water vapor evaporator 8. The water in the water storage tank is deionized water.

[0042] The solid oxide energy conversion device further comprises an electronic load 6, which is electrically connected to the battery test fixtures in the tubular heating furnace 1 for button cell sheets and the heating electric furnace 7 for single cell sheets, respectively.

[0043] When fuel gas and air are introduced into the electrodes of the battery test fixture, the electrochemical test uses an electronic load 6 to make the solid oxide fuel cell generate electricity; when water vapor and air are introduced into the electrodes of the battery test fixture, the electrochemical test uses a power supply 5 to make the solid oxide electrolytic cell electrolyze water or co-electrolyze water and CO. 2 Production of hydrogen or synthesis gas.

[0044] The solid oxide energy conversion device also includes a display screen 2 and a control unit; the control unit is electrically connected to the display screen 2, a tubular heating furnace 1 for button cell sheets, a heating electric furnace 7 for single cell sheets, a plunger pump 4, a water vapor evaporator 8, a mass flow controller, a power supply 5, an electronic load 6 and a pressure device 3 respectively.

[0045] In actual use, take the following two battery cells of different specifications as examples:

[0046] (1)10*10cm 2 Large-area single-cell water electrolysis performance test.

[0047] Put the single cell into the battery test fixture, and then put the sealed battery test fixture into the large-area single cell heating furnace 7. Connect the gas pipeline and the power connector. The top pressure device 3 will descend at a speed of 5mm / s. After hitting the battery test fixture and generating pressure, it will be changed to a speed of 0.1mm / s. When the pressure is close to the set value of 1 to 5kg, it will be reduced at a speed of 0.01mm / s. Stop when reaching the set pressure range (-1 to +1kg) and close the single cell heating furnace 7. After the airtightness test, heat up to 700℃ at a rate of 1.5℃ / min and keep the temperature unchanged. Pass 30vol% H 2 The battery cell was reduced. After 1 hour of reduction, the open circuit voltage of the battery cell was above 1V. At this time, the battery cell was considered to be fully reduced, and then the test began. The test conditions were that water vapor was used as the raw material to pass into the fuel electrode side, which contained a small amount of H 2 (20%) to prevent the electrode from being oxidized during the electrolysis process, air is the oxidant, H 2 The flow rate is 1L / min, and the electrolysis performance is recorded through power supply 5. Different current values ​​are adjusted to test until the average voltage of the single cell is about 1.3V. The system automatically records the performance of constant current electrolysis. 2 The same steps are performed as above for the flow rate ratio of the nitrogen gas and air, and the corresponding current density-voltage relationship is recorded. After the test is completed, the device is turned off, the mass flow controller on the nitrogen pipeline is turned on, and the nitrogen purge is turned off after the temperature drops to 200°C.

[0048] (2) Test of power generation performance of button cell.

[0049] The button cell is placed in the battery test fixture, and the sealed battery test fixture is placed in the tubular heating furnace 1 for button cell. The gas pipeline and the power connector are connected. After the air tightness test, the temperature is raised to 700°C at a rate of 3°C / min and kept constant. After the temperature reaches the working temperature, an appropriate amount of H is introduced. 2The test was started after the electrode surface was subjected to a reduction reaction for about half an hour. 2 (3% H 2 O) as fuel, air as oxidant, H 2 The flow rate was 80 ml / min, and the current density-voltage (IV) of the battery was recorded by electronic load 6. 2 The same steps are performed for the flow rate ratio of the furnace and air, and the corresponding current density-voltage relationship is recorded. After the test is completed, the power program segment and the heating program segment are turned off. After the temperature of the electric furnace drops to 400°C, the pump is stopped, the hydrogen and air flow controllers are turned off, and the nitrogen mass flow controller is turned on to purge at a speed of 1L / min. After the temperature drops to 200°C, the nitrogen purge is turned off.

[0050] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A solid oxide energy conversion device integrating dual-specification cells, characterized in that: It includes a tubular heating furnace for button cell sheets, a heating electric furnace for single cell sheets, a fuel electrode gas side, an air electrode gas side, a water vapor evaporator, a power supply, a double-column AB switching silica gel / molecular sieve drying and dehydrating device, and a condenser; the tubular heating furnace for button cell sheets and the heating electric furnace for single cell sheets are both provided with a battery test fixture, and the battery test fixture includes a cathode side and an anode side; the air electrode gas side is connected to the anode side; The fuel electrode gas side is connected to the inlet of the water vapor evaporator through a pipeline; the inlet of the water vapor evaporator is also connected to a water vapor unit, and the outlet of the water vapor evaporator is connected to the inlet of the cathode side of the battery test fixture; the outlet of the cathode side of the battery test fixture is connected to the condenser and the double-column AB switching silica gel / molecular sieve drying and dehydrating device in sequence; The power source is electrically connected to the battery testing fixture.

2. The solid oxide energy conversion device with integrated dual-size cells according to claim 1, characterized in that: The fuel electrode gas side includes a plurality of steel cylinders, and the plurality of steel cylinders are connected to the water vapor evaporator through pipelines; the steel cylinders on the fuel electrode gas side store fuel electrode gases H2, CO2, CO or CH4 respectively.

3. The solid oxide energy conversion device with integrated dual-size cells according to claim 2, characterized in that: The air cathode gas side includes a plurality of steel cylinders, and the plurality of steel cylinders are connected to the water vapor evaporator through pipelines. The steel cylinders on the air cathode gas side store compressed air or oxygen.

4. The solid oxide energy conversion device with integrated dual-size cells according to claim 3, characterized in that: The fuel electrode gas side and the air electrode gas side are both connected to nitrogen pipelines in parallel, and the pipelines after the reaction are purged by nitrogen.

5. The solid oxide energy conversion device with integrated dual-size cells according to claim 4, characterized in that: Mass flow controllers are respectively provided on the pipelines on the air electrode gas side and the fuel electrode gas side.

6. The solid oxide energy conversion device with integrated dual-size cells according to claim 5, characterized in that: The water vapor unit comprises a plunger pump and a water storage tank. One end of the plunger pump is connected to the water storage tank, and the other end is connected to the water vapor evaporator. The water in the water storage tank is deionized water.

7. The solid oxide energy conversion device with integrated dual-size cells according to claim 6, characterized in that: The solid oxide energy conversion device also includes an electronic load, which is electrically connected to the battery testing fixtures in the tubular heating furnace for button battery sheets and the heating electric furnace for single battery sheets, respectively.

8. The solid oxide energy conversion device with integrated dual-size cells according to claim 7, characterized in that: The solid oxide energy conversion device also includes a pressure device, which is arranged above the heating furnace for the single cell sheet, and the pressure device includes a telescopic cylinder and a counterweight block; the output end of the telescopic cylinder is connected to the counterweight block, and the position of the counterweight block matches the position of the battery test fixture in the heating furnace for the single cell sheet.

9. The solid oxide energy conversion device with integrated dual-size cells according to claim 8, characterized in that: The solid oxide energy conversion device also includes a display screen and a control unit; the control unit is electrically connected to the display screen, a tubular heating furnace for button cell sheets, a heating electric furnace for single cell sheets, a plunger pump, a water vapor evaporator, a mass flow controller, a power supply, an electronic load and a pressure device respectively.

10. The solid oxide energy conversion device with integrated dual-size cells according to claim 1, characterized in that: The anode side of the battery test fixture is also provided with a gas exhaust port.

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