Simple gas cell wide temperature range testing device

Abstract

The application is a simple gas battery wide temperature range testing device, which adopts a metal bottle body and a top cover to seal a testing cavity, a plurality of layers of PCB circuit boards are fixed in the bottle body through a lengthened screw rod, a plurality of button cell seats are integrated on each layer of circuit board, the positive and negative electrode leads of each cell seat are collected to a horn socket through the circuit board to realize the multi-channel synchronous connection with the external circuit, the top cover is provided with a gas inlet pipe interface, a gas outlet pipe interface and a gas pressure gauge, the accurate control of static atmosphere and dynamic atmosphere can be realized flexibly, and the series connection, parallel connection and mixed connection expansion of multiple devices are supported. The application solves the problems of easy deformation and air leakage, uneven heat transfer and poor air convection of the existing testing device under variable temperature conditions, can provide a stable, efficient and atmosphere controllable electrochemical performance testing platform for various metal-gas batteries in a wide temperature range, and has important significance for the mechanism research and performance evaluation of gas batteries in extreme environments.

Description

Technical Field

[0001] This invention relates to the field of electrochemical power sources, and more specifically, to a simple gas battery wide-temperature-range testing device. Background Technology

[0002] Climate change caused by the greenhouse effect has spurred the development of technologies for reducing and capturing carbon dioxide emissions. Alkali metal carbon dioxide batteries, which can both capture and utilize carbon dioxide for energy storage, hold promise as an effective way to reduce net carbon emissions and achieve carbon neutrality. Alkali metal carbon dioxide batteries are a novel type of secondary battery that achieves current output through the oxidation of metal at the anode and the reduction of carbon dioxide at the cathode. First reported by Archer et al. in 2013, their theoretical specific capacity is as high as 1876 mAh g⁻¹. -1 (Based on lithium mass) The theoretical specific energy can reach 5253 Wh kg. -1 In the future, it could provide energy storage and supply on Mars, which has a high concentration of carbon dioxide.

[0003] Currently, there are two main types of devices for metal-gas testing: one is a simulated battery, often using Swagelok molds, and the other is an open-cell button cell testing device using glass or plastic bottles as containers.

[0004] The Swagelok mold, originally named for its use of ferrule fittings and stainless steel tubing manufactured by Swagelok, is characterized by its simple and quick assembly and disassembly. However, due to the presence of only a single vent, it easily creates dead zones inside the battery, making it difficult to obtain a test system with a pure atmosphere. Although subsequent research has separated the gas entry and exit pathways, the stainless steel inlet tube, which also serves as the positive electrode's conductive path, must maintain tight contact with the positive electrode material to reduce the battery's internal resistance. However, excessive tightness can easily lead to deformation of the positive electrode or even a short circuit between the positive and negative electrodes.

[0005] Because stainless steel button cell batteries have high mechanical strength and good conductivity, alkali metal carbon dioxide batteries often use positive electrode perforated (usually 17 or 19 holes) battery casings, and a microporous membrane can be placed on top to help suppress electrolyte evaporation.

[0006] Currently, devices using acrylic and plastic (referring to the cap of the glass bottle) as container materials have relatively poor stability. They are prone to deformation and leakage at connection points during testing under varying temperature conditions and when changing atmospheres due to negative pressure. Furthermore, the heat transfer rate of the bottle is relatively slow, and temperature differences between the inside of the bottle and the external environment may exist during testing, affecting the research results.

[0007] Furthermore, because it takes time for the gas to diffuse and become uniform after entering the bottle from the inlet, these devices can only measure the battery's electrochemical performance under a static atmosphere after gas exchange is complete. Also, considering the impact of the gases consumed and generated during the charge-discharge reaction on the atmosphere, high-density placement of the battery holders is not possible; for example, a 1 L container is typically used to test two batteries simultaneously. Summary of the Invention

[0008] This invention provides a simple gas battery testing device that solves the problems of deformation and leakage, uneven heat transfer, and poor airflow convection in existing testing devices under varying temperature conditions.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A simple wide-temperature-range testing device for gas batteries includes a metal bottle with an open top and a sealable top cover. The top cover is connected to an extension screw, on which multiple PCB circuit boards are fixed at intervals. Each PCB circuit board has multiple button cell battery holders soldered on it. The button cell battery holders are used to hold assembled button cell metal-gas batteries. The positive and negative leads of the button cell battery holders are led out from the PCB circuit board to the positive and negative horn-shaped sockets, respectively. The top cover is provided with an inlet pipe interface and an outlet pipe interface with valves.

[0011] Further technology of the present invention:

[0012] Preferably, the top cover is equipped with a pressure gauge for detecting the air pressure inside the metal bottle.

[0013] Preferably, a threaded blind hole is provided at the center of the lower side of the top cover for fixing the extension screw.

[0014] Preferably, the metal bottle body has an external thread at the bottle mouth, and the top cover has an internal thread groove that mates with the external thread at the bottle mouth. After alignment, the top cover is screwed in and tightened to form a sealed cavity.

[0015] Preferably, a sealing ring is provided at the bottom of the internal threaded groove.

[0016] Preferably, the air inlet pipe interface connects to an air inlet pipe that extends into the bottom of the metal bottle, and a multi-hole nozzle is connected to the air inlet pipe outlet. Using a multi-hole spray device to supply air from the bottom up provides a uniform atmosphere, enabling simultaneous measurement of multiple batteries within the device.

[0017] Preferably, the metal bottle body is also equipped with a small fan to increase the gas convection speed.

[0018] Furthermore, when multiple devices need to be tested, the testing device of the present invention can be assembled in series, parallel, or in a mixed manner. Specifically, the series assembly method is as follows: the air inlet pipe interface of the first device is normally connected, and the air outlet pipe interface of the previous device is connected to the air inlet pipe interface of the next device in sequence, so as to realize the series connection of multiple devices.

[0019] The parallel assembly method is as follows: the air inlet ports of multiple test devices are connected to the air source, and the air outlet ports of these test devices are connected to the main air outlet, so as to realize the parallel connection of multiple test devices.

[0020] The mixed assembly method is as follows: multiple test devices are connected in series to form a group, and the operation is the same as the series assembly method described above. The air inlet ports of multiple such series test devices are connected to the air source, and the air outlet ports of these series test devices are connected to the main air outlet to realize the mixed connection of multiple test devices.

[0021] Compared with the prior art, the present invention provides a simple wide-temperature-range testing device for gas batteries, which has the following advantages:

[0022] This invention utilizes a metal bottle body, which facilitates rapid temperature changes and withstands low-temperature testing environments, is not easily deformed, and has a small size. It allows for series, parallel, and mixed connections of gas pipelines, and the ability to perform vacuum operations within the bottle ensures the purity of the testing atmosphere. It can test various gas batteries, withstand variable temperature testing environments, provide a uniform testing atmosphere (both static and dynamic), offer a gas pressure display, and provide multi-channel battery / electrochemical testing interfaces. It boasts advantages such as stable structure, high testing accuracy, convenient disassembly and maintenance, and wide applicability. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the simplified battery testing device of the present invention as disclosed in an embodiment of the present invention. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1: As Figure 1 This embodiment provides a simple gas battery wide temperature range testing device. The device specifically includes a metal bottle (1), the top of which is open and sealed with an openable top cover (9). The top cover (9) is connected to an extension screw (10), and multiple PCB circuit boards (2) are fixed at intervals on the extension screw (10). Multiple button battery holders are soldered on each PCB circuit board (2). The button battery holders are used to hold assembled button metal-gas batteries. The positive and negative leads of the button battery holders are led out from the PCB circuit board (2) to the positive horn socket (4) and the negative horn socket (5), respectively. The top cover (9) is provided with an air inlet (6) and an air outlet (7) with valves.

[0027] A pressure gauge (8) is installed on the top cover (9) to detect the air pressure inside the metal bottle (1).

[0028] A threaded blind hole is provided at the center of the lower side of the top cover (9) for fixing the extension screw (10).

[0029] The metal bottle body (1) has an external thread at the bottle mouth, and the top cover (9) has an internal thread groove that matches the external thread at the bottle mouth. The bottom of the internal thread groove has a sealing ring. After alignment, the ring is screwed in and tightened to form a sealed cavity.

[0030] An air inlet pipe is connected to the bottom of the metal bottle (1), and a multi-hole nozzle is connected to the outlet of the air inlet pipe. A small fan is also installed inside the metal bottle (1) to increase the gas convection speed.

[0031] In this embodiment, the test bottle body and top cap are made of 304 stainless steel, and the inlet and outlet pipes are made of polytetrafluoroethylene (PTFE) tubing.

[0032] First, assemble the metal-gas battery inside the glove box. During testing, place the assembled button-type metal-gas battery into the button battery base and secure it. Place the circuit board inside the bottle, align the bottle with the top cap, and tighten it by rotation. First, close the inlet gas inlet, connect the gas inlet to a vacuum pump to evacuate to negative pressure, then close the outlet gas inlet, open the inlet gas inlet, and introduce the reaction gas. Repeat this several times, then close the inlet / outlet gas inlet and connect an external testing circuit to test the electrochemical performance of the battery.

[0033] Example 2:

[0034] The battery assembly process is the same as in Example 1. However, the air inlet ports of multiple test devices are connected to the gas source, and the air outlet ports of these test devices are connected to the main air outlet. A control valve is connected to the air inlet port or air outlet port of each test device to control the gas flow rate in each test device, so as to realize the parallel connection of multiple test devices under static atmosphere. The rest is the same as in Example 1.

[0035] Example 3

[0036] The battery assembly process is the same as in Example 1, but after connecting the air inlet port of the first test device to the air source, the air outlet port of the first test device is connected to the air inlet port of the second test device through a connector, the air outlet port of the second test device is connected to the air inlet port of the third test device through a connector, and so on, to realize the series connection of multiple test devices under static atmosphere. The rest is the same as in Example 1.

[0037] Example 4

[0038] The battery assembly process is the same as in Example 1. However, the testing device is placed in a -80 ℃ low-temperature device and connected to an external testing circuit to perform electrochemical performance testing on the battery, realizing battery measurement in a static atmosphere low-temperature environment. The rest is the same as in Example 1.

[0039] Example 5

[0040] The battery assembly process is the same as in Example 1. However, the testing device is placed in an 80°C high-temperature testing device and connected to an external testing circuit to perform electrochemical performance testing on the battery, realizing battery measurement in a static atmosphere high-temperature environment. The rest is the same as in Example 1.

[0041] Example 6

[0042] The battery assembly process is the same as in Example 1. The top inlet pipe interface is connected to an inlet pipe that extends into the bottom of the metal bottle. A multi-hole nozzle is connected to the outlet of the inlet pipe, and a small fan is installed inside the bottle. First, close the inlet pipe interface, connect the outlet pipe interface to a vacuum pump to evacuate to negative pressure, then close the outlet pipe interface and open the inlet pipe interface to introduce the reaction gas. After repeating this several times, continuously allow carbon dioxide to pass through a gas flow meter and then into the bottle along the inlet pipe. Once the flow rate is stabilized, electrochemical performance testing is performed. This achieves battery measurement under a dynamic atmosphere; the rest is the same as in Example 1.

[0043] Example 7

[0044] The battery assembly process is the same as in Example 1. However, the testing device is placed in a -80°C cryogenic environment. The inlet / outlet gas pipe interfaces are led out from the cryogenic environment, and the top gas inlet interface is connected to the gas inlet pipe extending into the bottom of the metal bottle. A multi-hole nozzle is connected to the outlet of the gas inlet pipe, and a small fan is installed inside the bottle. First, the gas inlet interface is closed, and the gas outlet interface is connected to a vacuum pump to evacuate to negative pressure. Then, the gas outlet interface is closed again, and carbon dioxide is introduced. After repeating this several times, carbon dioxide is continuously allowed to pass through a gas flow meter and then enter the bottle along the gas inlet pipe. After the flow rate is stabilized, an external testing circuit is connected to test the electrochemical performance of the battery. This achieves battery measurement under a dynamic atmosphere in a low-temperature environment, and the rest is the same as in Example 1.

[0045] Example 8

[0046] The battery assembly process is the same as in Example 1. However, the testing device is placed in an 80°C high-temperature testing device. The inlet / outlet gas pipe interfaces are led out from the high-temperature device, and the top gas inlet interface is connected to the gas inlet pipe extending into the bottom of the metal bottle. A multi-hole nozzle is connected to the outlet of the gas inlet pipe, and a small fan is installed inside the bottle. First, the gas inlet interface is closed, and the gas outlet interface is connected to a vacuum pump to evacuate to negative pressure. Then, the gas outlet interface is closed, and carbon dioxide is introduced. After repeating this several times, carbon dioxide is continuously allowed to pass through a gas flow meter and then enter the bottle along the gas inlet pipe. After the flow rate is stabilized, an external testing circuit is connected to test the electrochemical performance of the battery. This achieves battery measurement under a low-temperature dynamic atmosphere, and the rest is the same as in Example 1.

[0047] Through the above design, this device successfully solves the problems of simultaneous testing of multiple cells and intolerance to high and low temperatures in button cell testing. It can test various gas cells, such as Li / Na / K / Zn-CO2 / N2 / O2 / air, and provides a dynamic and static uniform test atmosphere, a gas pressure display, and a multi-channel battery / electrochemical test interface. It has the advantages of stable structure, high testing accuracy, convenient disassembly and maintenance, and wide applicability.

[0048] In this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A simple gas cell wide temperature range testing device, characterized in that: The device includes a metal bottle (1), which has an open top and is sealed with an openable top cover (9). The top cover (9) is connected to an extension screw (10), and multiple PCB circuit boards (2) are fixed at intervals on the extension screw (10). Multiple button battery holders are soldered on each PCB circuit board (2). The button battery holders are used to house the assembled button metal-gas batteries. The positive and negative leads of the button battery holders are led out from the PCB circuit board (2) to the positive horn socket (4) and the negative horn socket (5), respectively. The top cover (9) is provided with an air inlet (6) and an air outlet (7) with valves.

2. The simple gas cell wide temperature range testing device according to claim 1, characterized in that: The top cover (9) is equipped with a pressure gauge (8) for detecting the air pressure inside the metal bottle (1).

3. The simplified gas battery wide-temperature-range testing device according to claim 1, characterized in that: A threaded blind hole is provided at the center of the lower side of the top cover (9) for fixing the extension screw (10).

4. The simplified gas battery wide-temperature-range testing device according to claim 1, characterized in that: The metal bottle body (1) has an external thread at the bottle mouth, and the top cover (9) has an internal thread groove that matches the external thread at the bottle mouth. After alignment, the top cover is screwed in and tightened to form a sealed cavity.

5. A simple gas battery wide-temperature-range testing device according to claim 4, characterized in that: The bottom of the internal threaded groove is equipped with a sealing ring.

6. The simplified gas battery wide-temperature-range testing device according to claim 1, characterized in that: The air inlet pipe interface is connected to the air inlet pipe extending into the bottom of the metal bottle (1), and a multi-hole nozzle is connected to the air inlet pipe outlet.

7. A simple gas battery wide-temperature-range testing device according to claim 1, characterized in that: The metal bottle (1) is also equipped with a small fan to increase the gas convection speed.

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