Testing device for metal halogen battery

Abstract

The utility model provides a testing device for a metal halogen battery. The testing device comprises a transparent container and a sealing cover, the bottom of the inner side of the transparent container is filled with a solid or liquid positive halogen simple substance; a negative electrode assembly is suspended on the top of the inner side of the transparent container, is positioned above the positive halogen simple substance and is not in direct contact with the positive halogen simple substance; the negative electrode assembly comprises two stacked negative electrode metal sheets and a conductive net clamped between the two negative electrode metal sheets; the conductive net is connected with a cathode lead, the top wall of the transparent container is provided with a first through hole for the cathode lead to pass through, and the upper end of the cathode lead passes through the first through hole and falls outside the transparent container; the side wall of the transparent container is provided with a second through hole for the positive lead to penetrate through, the inner end of the positive lead abuts against the surface of the negative metal sheet, and the outer end of the positive lead falls outside the transparent container. The testing device disclosed by the utility model can provide reference for selecting proper electrode materials and setting technical parameters during industrial production.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a testing device for metal halide batteries. Background Art

[0002] The most commonly used metal halide battery on the market is the lithium-iodine battery. Lithium-iodine batteries are mainly used as power sources inside microelectronic devices and implantable medical devices. They have high energy density and obvious volume advantages. In the lithium-iodine battery system, iodine is usually used as the positive electrode active substance, while metallic lithium is used as the negative electrode material. The iodine is converted into a gas by heating, and then a chemical reaction occurs on the surface of the metallic lithium negative electrode to generate lithium iodide in situ. The generated lithium iodide can not only serve as an electrolyte, but also acts as a diaphragm, effectively isolating the positive and negative electrodes, preventing short circuits, and allowing the transmission of ions. The reaction equation of the lithium-iodine battery is: 2Li + I2 = 2LiI.

[0003] Generally speaking, gaseous halogens pose significant risks to both operators and the environment. Furthermore, metal halide batteries are expensive to manufacture, time-consuming, and require significant materials. Furthermore, the formation of the solid electrolyte is difficult to monitor, placing significant cost and operational pressures on the development of new cathode and anode materials for metal halide batteries. Therefore, developing a simple, easy-to-use, low-cost testing device that allows for convenient observation of battery reactions is crucial to screen suitable materials for metal halide batteries and reduce manufacturing costs. Utility Model Content

[0004] The purpose of the utility model is to provide a testing device for a metal halide battery.

[0005] A metal halide battery testing device includes a transparent container;

[0006] The transparent container is provided with a material inlet, and a detachable sealing cover is provided at the material inlet;

[0007] The bottom of the inner side of the transparent container is filled with a solid or liquid positive electrode halogen element;

[0008] A negative electrode assembly is suspended on the top of the inner side of the transparent container, and the negative electrode assembly is located above the solid or liquid positive electrode halogen element and is not in direct contact with the solid or liquid positive electrode halogen element;

[0009] The negative electrode assembly includes two stacked negative electrode metal sheets and a conductive mesh sandwiched between the two negative electrode metal sheets;

[0010] A negative electrode lead is connected to the conductive mesh, a first through hole for the negative electrode lead to pass through is opened on the top wall of the transparent container, and the upper end of the negative electrode lead passes through the first through hole and falls outside the transparent container;

[0011] A second through hole is provided on the side wall of the transparent container for the positive electrode lead to pass through, the inner end of the positive electrode lead contacts the surface of the negative electrode metal sheet, and the outer end of the positive electrode lead falls outside the transparent container;

[0012] The metal halide battery testing device further includes a heating device capable of heating the bottom of the transparent container.

[0013] When the bottom of the transparent container is heated, the solid or liquid positive electrode halogen element sublimates into a gaseous state after heating, and the gaseous positive electrode halogen element adheres to the surface of the negative electrode metal sheet, and a solid electrolyte membrane layer is generated in situ on the surface of the negative electrode metal sheet.

[0014] The metal halide battery testing device of the present invention can intuitively observe the volatilization of the positive electrode halogen element and the generation of the solid electrolyte on the surface of the negative electrode metal sheet, providing a reference for selecting suitable positive and negative electrode materials and setting technical parameters in subsequent industrial production, thereby reducing manufacturing costs. In addition, the gaseous positive electrode halogen element is confined in a transparent container to avoid harm to the operator and pollution to the environment. The excess gaseous positive electrode halogen element will condense into a solid or liquid when the transparent container is cooled to below the sublimation temperature, and can be reused repeatedly to avoid waste. In addition, the inner end of the positive electrode lead contacts the surface of the negative electrode metal sheet, so that the positive electrode lead maintains good contact with the solid electrolyte layer. At the same time, the outer ends of the positive electrode lead and the positive electrode lead both fall outside the transparent container, providing conditions for "measuring battery voltage, internal resistance, short-circuit current and other performance indicators without opening the transparent container."

[0015] Furthermore, a first rubber plug is sleeved on the negative lead to seal the gap between the negative lead and the wall of the first through hole to prevent gaseous positive electrode halogen from overflowing from the first through hole, polluting the environment and causing harm to the operator.

[0016] Furthermore, a second rubber plug is provided on the positive lead to seal the gap between the positive lead and the wall of the second through-hole, preventing gaseous positive halogen from escaping from the second through-hole, potentially polluting the environment and endangering the operator. The positive lead can be positioned perpendicular to the plane of the negative metal sheet. Of course, the positive lead can be, but is not limited to, perpendicular to the plane of the negative metal sheet; it can also form an acute angle with the plane of the negative metal sheet or be located in the same plane.

[0017] Furthermore, the outer contour line of the negative electrode metal sheet is located outside the contour line of the conductive mesh, and the two negative electrode metal sheets are bonded and fixed together, so that the conductive mesh is completely encapsulated between the two negative electrode metal sheets, so that more gaseous positive electrode halogen elements are attached to the outer surface of the negative electrode metal sheet, and the conductive mesh plays the role of collecting current and conducting current.

[0018] The transparent container is preferably a transparent glass container. Of course, the transparent container can be, but is not limited to, a transparent glass container, as long as it is heat-resistant, transparent, and made of a material that does not react with battery materials.

[0019] The positive electrode halogen element is a single type of halogen element, or a mixture of multiple different types of halogen elements.

[0020] The heating device is preferably a magnetic stirring heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a metal halide battery testing device of the present invention;

[0022] Figure 2 for Figure 1 Left side view of the metal halide battery test apparatus, Figure 2 The negative electrode assembly in FIG is a longitudinal cross-sectional view. DETAILED DESCRIPTION

[0023] The preferred embodiment of the metal halide battery testing device of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] Combine Figure 1 and Figure 2 , a metal halide battery testing device, comprising a transparent container 10;

[0025] The transparent container 10 is provided with a material inlet 11, and a detachable sealing cover 20 is provided at the material inlet 11;

[0026] The bottom of the transparent container 10 is filled with a solid or liquid positive electrode halogen element 30;

[0027] A negative electrode assembly 40 is suspended on the top of the transparent container 10. The negative electrode assembly 40 is located above the solid or liquid positive electrode halogen element 30 and is not in direct contact with the solid or liquid positive electrode halogen element 30.

[0028] The negative electrode assembly 30 includes two stacked negative electrode metal sheets (41, 42) and a conductive mesh 43 sandwiched between the two negative electrode metal sheets (41, 42);

[0029] A negative electrode lead 50 is connected to the conductive mesh 43 , and a first through hole for the negative electrode lead 50 to pass through is formed on the top wall of the transparent container 10 . The upper end of the negative electrode lead 50 passes through the first through hole and falls outside the transparent container 10 .

[0030] A second through hole is provided on the side wall of the transparent container 10 for the positive electrode lead 60 to pass through, the inner end of the positive electrode lead 60 is in direct contact with the surface of the negative electrode metal sheet (41, 42), and the outer end of the positive electrode lead 60 falls outside the transparent container 10;

[0031] The metal halide battery testing device further includes a heating device (conventional existing structure, not shown) capable of heating the bottom of the transparent container 10;

[0032] The positive electrode halogen element 30 is a solid iodine element, the negative electrode metal sheets (41, 42) are lithium sheets, and the positive electrode lead 60 and the negative electrode lead 50 are both made of stainless steel.

[0033] The method for using the above-mentioned metal halide battery testing device comprises the following steps:

[0034] (1) 10 g of solid iodine 30 is placed into the transparent container 10;

[0035] (2) Installing the negative electrode assembly 40 on the top of the transparent container 10;

[0036] (3) Installing the positive electrode lead 60 on the side wall of the transparent container 10 so that the inner end of the positive electrode lead 60 is in direct contact with the surface of the negative electrode metal sheet (41, 42) and the outer end of the positive electrode lead 60 falls outside the transparent container 10;

[0037] (4) Cover with the sealing cover 20;

[0038] (5) Turn on the heating device to heat the bottom of the transparent container 10 so that the solid iodine element 30 is sublimated into a gaseous state after heating; continue heating, control the heating temperature at 30 to 50° C., heat for more than 5 minutes, and then turn off the heating device.

[0039] Without opening transparent container 10, the positive and negative terminals of a voltage detection device (multimeter) were connected to the outer ends of positive lead 60 and negative lead 50, respectively, to measure the battery voltage, which was 2.765 V. Alternatively, other performance indicators such as the battery's internal resistance and short-circuit current can be measured using a measuring instrument.

[0040] Of course, the positive electrode halogen element 30 and the negative electrode metal sheets (41, 42) of the present invention can be replaced with other halogens (for example, liquid bromine (Br), solid iodine (I), solid astatine (At), solid thallium (Ts)) and other metal sheets (for example, sodium (Na), potassium (K), etc.) as needed. This is to test the reaction conditions and battery performance of metal halide batteries prepared from various positive and negative electrode material combinations. The heating temperature and heating time of the solid or liquid positive electrode halogen element 30 are adjusted according to the type of halogen element and the test requirements.

[0041] The conductive mesh 43 is a nickel mesh or a stainless steel mesh.

[0042] Preferably, Figure 1 、 Figure 2 As shown, the negative electrode lead 50 is also covered with a first rubber plug 51 to seal the gap between the negative electrode lead 50 and the wall of the first through-hole, preventing gaseous positive electrode halogen from escaping from the first through-hole, polluting the environment and causing harm to operators. Of course, the first rubber plug 51 can also be provided when the first through-hole is relatively small.

[0043] Preferably, Figure 2 As shown, a second rubber plug 61 is sleeved over the positive lead 60 to seal the gap between the positive lead 60 and the wall of the second through-hole, preventing gaseous positive halogen from escaping from the second through-hole, potentially polluting the environment and endangering operators. Of course, the second rubber plug 61 can also be provided when the second through-hole is relatively small.

[0044] The positive electrode lead 60 may be arranged perpendicular to the plane where the negative electrode metal sheets (41, 42) are located. Of course, the positive electrode lead 60 may be, but is not limited to, perpendicular to the plane where the negative electrode metal sheets (41, 42) are located. It may also be arranged at an acute angle or parallel to the plane where the negative electrode metal sheets (41, 42) are located.

[0045] Preferably, combined Figure 1 and Figure 2 The outer contour line of the negative electrode metal sheet (41, 42) is located outside the contour line of the conductive mesh 43, and the two metal sheets (41, 42) are bonded and fixed together, so that the conductive mesh 43 is completely encapsulated between the two metal sheets (41, 42), so that more gaseous positive electrode halogen elements are attached to the outer surface of the negative electrode metal sheet (41, 42), and the conductive mesh 43 plays the role of collecting current and conducting current.

[0046] The transparent container 10 is preferably a transparent glass container. Of course, the transparent container 10 can be, but is not limited to, a transparent glass container, as long as it is heat-resistant, transparent, and made of a material that does not react with battery materials.

[0047] The positive electrode halogen element 30 is a single type of halogen element or a mixture of multiple different types of halogen elements.

[0048] The heating device is preferably a magnetic stirring heater. At this time, the solid or liquid positive electrode halogen element 30 in the above step (4) can be heated while being stirred.

[0049] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A metal halide battery testing device, characterized in that: comprising a transparent container; The transparent container is provided with a material inlet, and a detachable sealing cover is provided at the material inlet; The bottom of the inner side of the transparent container is filled with a solid or liquid positive electrode halogen element; A negative electrode assembly is suspended on the top of the inner side of the transparent container, and the negative electrode assembly is located above the solid or liquid positive electrode halogen element and is not in direct contact with the solid or liquid positive electrode halogen element; The negative electrode assembly includes two stacked negative electrode metal sheets and a conductive mesh sandwiched between the two negative electrode metal sheets; A negative electrode lead is connected to the conductive mesh, a first through hole for the negative electrode lead to pass through is opened on the top wall of the transparent container, and the upper end of the negative electrode lead passes through the first through hole and falls outside the transparent container; A second through hole is provided on the side wall of the transparent container for the positive electrode lead to pass through, the inner end of the positive electrode lead contacts the surface of the negative electrode metal sheet, and the outer end of the positive electrode lead falls outside the transparent container; The metal halide battery testing device further includes a heating device capable of heating the bottom of the transparent container.

2. The metal halide battery testing device according to claim 1, wherein: The negative electrode lead is also sleeved with a first rubber plug for sealing the gap between the negative electrode lead and the wall of the first through hole.

3. The metal halide battery testing device according to claim 1, wherein: A second rubber plug is sleeved on the positive electrode lead to seal the gap between the positive electrode lead and the wall of the second through hole.

4. The metal halide battery testing device according to claim 1, wherein: The positive electrode lead is arranged perpendicular to the plane where the negative electrode metal sheet is located.

5. The metal halide battery testing device according to claim 1, wherein: The outer contour line of the negative electrode metal sheet is located outside the contour line of the conductive mesh, and the two negative electrode metal sheets are bonded and fixed together, so that the conductive mesh is completely encapsulated between the two negative electrode metal sheets.

6. The metal halide battery testing device according to claim 1, wherein: The transparent container is a transparent glass container.

7. The metal halide battery testing device according to claim 1, wherein: The positive electrode halogen element is a single type of halogen element, or a mixture of multiple different types of halogen elements.

8. The metal halide battery testing device according to claim 1, wherein: The heating device is a magnetic stirring heater.

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