Battery test structure

Abstract

The utility model discloses a battery test structure. The battery test structure comprises a base; a sealing cover is arranged on the base, and the sealing cover and the base form a volume cavity; a supporting pipe is arranged on the base, the supporting pipe penetrates through the base and extends into the inner side of the volume cavity, and a battery is arranged at the end, located on the inner side of the volume cavity, of the supporting pipe; the battery is separated from the external environment through the sealing cover, the battery is arranged on the inner side of the volume cavity, the air pressure in the volume cavity is adjusted through the supporting pipe and the air outlet pipe, adjustment and control over the pressure are achieved, and a pressurization test is conducted on the battery.

Description

Technical Field

[0001] This utility model relates to the field of battery testing devices, and in particular to a battery testing structure. Background Technology

[0002] To effectively eliminate the influence of other functional layers in the battery during testing, an important method for testing the electrochemical performance of solid oxide battery electrodes is the symmetric four-electrode test method. This method involves screen printing and high-temperature sintering to print two identical electrodes (air or fuel) onto an electrolyte substrate. Subsequently, a voltage line and a current line are drawn from each electrode to perform a four-electrode impedance test, thus obtaining the electrochemical performance of the electrodes.

[0003] Due to limitations in testing conditions and application scenarios, current testing of solid oxide symmetric batteries is mostly conducted at ambient pressure (one atmosphere). The testing method typically involves placing the battery, with its wires already connected, in a single-sided open alumina tube before the test. A test atmosphere (such as air) or a fuel atmosphere (such as hydrogen) is then introduced into the battery through another alumina tube to raise the temperature. Because this method operates in a semi-open environment, it can only test the electrochemical performance of the battery electrodes at ambient pressure.

[0004] However, with the development of solid oxide technology, the coupling of solid oxide batteries with other chemical technologies has gradually attracted attention. Since most industrial chemical reactions are carried out under high pressure (gas pressure above one atmosphere), the changes in the electrochemical performance of solid oxide battery electrodes under high pressure have also received more attention. However, current symmetric battery testing equipment is relatively simple and lacks the ability to pressurize the test gas. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a battery testing structure.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a battery testing structure, comprising:

[0007] Base;

[0008] A sealing cover is provided on the base, forming a volume cavity with the base;

[0009] A support tube is provided on the base, which extends through the base into the inner side of the volume cavity. A battery is installed at one end of the support tube located inside the volume cavity.

[0010] As a further description of the above technical solution: the base is clamped to the outside of the sealing cover by a spring clip.

[0011] As a further description of the above technical solution: a sealing ring is provided between the base and the sealing cover.

[0012] As a further description of the above technical solution: the base is provided with an air outlet pipe.

[0013] As a further description of the above technical solution: the sealing cover includes a volume portion and an outwardly extending connecting portion, the connecting portion being parallel to the base, and the sealing ring being located between the base and the connecting portion.

[0014] As a further description of the above technical solution: the base is provided with two connectors, the connectors penetrate the base, one end of the connector is located inside the volume cavity, and the other end is located below the base.

[0015] As a further description of the above technical solution: the connector is provided with two connecting wires, which are electrically connected to the battery.

[0016] As a further description of the above technical solution: the outer ring of the support tube is provided with four connecting tubes, and the battery wires are connected to the connecting lines through the connecting tubes.

[0017] As a further description of the above technical solution: the end of the support tube and the air outlet tube away from the sealing cover is connected to an external air valve.

[0018] As a further description of the above technical solution: the battery is a symmetrical battery.

[0019] The above technical solution has the following advantages or beneficial effects:

[0020] The battery is isolated from the external environment by a sealed cover, and placed inside the volumetric cavity. The air pressure inside the volumetric cavity is adjusted and controlled by the support tube and the vent tube, so as to perform pressure testing on the battery. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the battery testing structure proposed in this utility model.

[0022] Legend:

[0023] 1. Base; 2. Sealing cover; 21. Volume section; 22. Connecting section; 3. Support tube; 4. Battery; 5. Sealing ring; 6. Vent pipe; 7. Connector; 71. Connecting wire; 8. Connecting tube; 9. Wire. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figure 1 The present invention provides an embodiment of a battery testing structure, comprising: a base 1; a sealing cover 2 is provided on the base 1, forming a volume cavity with the base; a support tube 3 is provided on the base 1, the support tube 3 penetrates the base 1 and extends into the inner side of the volume cavity, and a battery 4 is provided at one end of the support tube 3 located inside the volume cavity, the battery 4 being a symmetrical battery.

[0026] In this embodiment, the battery 4 is separated from the external environment by the sealing cover 2, so that the battery 4 is placed inside the volume cavity. The air pressure inside the volume cavity is adjusted by the support tube 3 and the air outlet tube 6 to achieve pressure adjustment and control, and to perform a pressure test on the battery 4. The material of the support tube 3 is aluminum oxide.

[0027] The base 1 and the outer side of the sealing cover 2 are clamped together by a spring clip, and a sealing ring 5 is provided between the base 1 and the sealing cover 2.

[0028] In this embodiment, the outer edges of the base 1 and the sealing cover 2 are clamped by spring clips. The sealing ring 5 is an O-ring. During the test, mechanical pressure is applied to the sealing cover 2 and the base 1 by spring clips. The O-ring will deform under pressure, filling the existing gas gaps and achieving the function of gas sealing.

[0029] The base 1 is provided with an air outlet pipe 6, and the end of the support pipe 3 and the air outlet pipe 6 away from the sealing cover 2 is connected to an external air valve.

[0030] In this embodiment, the support tube 3 is used for inlet pressurization, and the outlet tube 6 is used for exhaust and depressurization. A back pressure regulator is installed on the gas path of the outlet tube 6 to regulate the gas pressure in the gas path, thereby enabling electrochemical performance testing of solid oxide symmetric batteries under high temperature and high pressure. The support tube 3 and the outlet tube 6 can be further connected to external gas paths and valves through Swagelok Ultra-torr vacuum tube connectors.

[0031] The sealing cover 2 includes a volume portion 21 and an outwardly extending connecting portion 22, which is parallel to the base 1. The sealing ring 5 is located between the base 1 and the connecting portion 22.

[0032] In this embodiment, the battery 4, the support tube 3, and the connecting member 7 are accommodated and placed in the volume portion 21. The connecting portion 22 extends outwardly in a ring shape. The cross-section of the volume portion 21 and the connecting portion 22 forms a "ji" shape. The material of the sealing cover 2 is quartz.

[0033] Two connecting members 7 are provided on the base 1. The connecting member 7 penetrates through the base 1. One end of the connecting member 7 is located inside the volume cavity, and the other end is located below the base 1. Two connecting wires 71 are provided on the connecting member 7 and are electrically connected to the battery 4 through the connecting wires 71. Four connecting tubes 8 are annularly provided on the outer side of the support tube 3. The wire 9 of the battery 4 is connected to the connecting wire 71 through the connecting tube 8.

[0034] In this embodiment, for current conduction, the four wires 9 led out from the tested symmetrical battery are respectively connected to the connecting wires 71 in the connecting member 7 through the four connecting tubes 8 to lead out the electrical signal. The material of the connecting tube 8 is alumina. The connecting member 7 is a vacuum through member with a copper wire penetrating through it. The connecting wire 71 is a copper wire. The four connecting tubes 8 are attached to the support tube 3 by being bundled with silver wires.

[0035] Working principle: In the test, the symmetrical battery 4 is placed at the end of the support tube 3. The four wires 9 are respectively connected to the four connecting wires 71 of the two connecting members 7 through the connecting tubes 8. Subsequently, the sealing cover 2 and the sealing ring 5 are placed on the base 1, and a mechanical pressure is applied to the sealing cover 2 and the base 1 using a spring clip. After the airtightness test, the entire test structure is placed in a tube furnace with a sealing ring. The support tube 3 and the gas outlet pipe 6 in the test structure are connected to an external gas pipe through Swagelok Ultra-torr vacuum tube fittings, and an electrochemical test instrument is connected to the connecting wire 71 outside the sealing cover 2 in the connecting member 7. Subsequently, it is heated up, and after introducing gas to reach the required air pressure for the test, an electrochemical test is carried out. During the test, the battery 4 and the upper half of the base 1 are in the hot zone in the tube furnace, and the temperature can reach up to 800 °C at most. The lower half is not heated by a heating wire, and its temperature can be maintained below 150 °C, enabling the sealing ring 5 to be used as a gas sealing method.

[0036] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A battery testing structure, characterized in that, include: Base (1); A sealing cover (2) is provided on the base (1), forming a volume cavity with the base; A support tube (3) is provided on the base (1). The support tube (3) extends through the base (1) into the inner side of the volume cavity. A battery (4) is provided at one end of the support tube (3) located inside the volume cavity.

2. The battery testing structure according to claim 1, characterized in that: The base (1) is clamped to the outside of the sealing cover (2) by a spring clamp.

3. The battery testing structure according to claim 1, characterized in that: A sealing ring (5) is provided between the base (1) and the sealing cover (2).

4. The battery testing structure according to claim 1, characterized in that: An air outlet pipe (6) is provided on the base (1).

5. The battery testing structure according to claim 3, characterized in that: The sealing cover (2) includes a volume portion (21) and an outwardly extending connecting portion (22), the connecting portion (22) being parallel to the base (1), and the sealing ring (5) being located between the base (1) and the connecting portion (22).

6. The battery testing structure according to claim 1, characterized in that: Two connectors (7) are provided on the base (1). The connectors (7) penetrate the base (1). One end of the connector (7) is located inside the volume cavity, and the other end is located below the base (1).

7. The battery testing structure according to claim 6, characterized in that: The connector (7) is provided with two connecting wires (71), which are electrically connected to the battery (4).

8. The battery testing structure according to claim 7, characterized in that: The outer ring of the support tube (3) is provided with four connecting tubes (8), and the wires (9) of the battery (4) are connected to the connecting line (71) through the connecting tubes (8).

9. The battery testing structure according to claim 4, characterized in that: The end of the support tube (3) and the air outlet tube (6) away from the sealing cover (2) is connected to an external air valve.

10. The battery testing structure according to claim 1, characterized in that: The battery (4) is a symmetrical battery.

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