Omnidirectional activation structure of zinc-silver battery

Abstract

The utility model provides an omnidirectional activation structure of a zinc-silver battery. Comprising a liquid reservoir and a cell stack, the liquid reservoir comprises an upper cover, an air bag and a bottom shell which are all hemispherical, the air bag is arranged in the upper cover, the upper cover is inversely buckled on the bottom shell, the hemispherical design facilitates overturning of the air bag, it is ensured that electrolyte can be completely squeezed at any angle, and residues are avoided. The top of the upper cover is provided with an air inlet connected with a high-pressure air source; a liquid outlet pipe is arranged at the bottom of the hemispherical bottom shell and is connected with the cell stack; and an easily-broken membrane is arranged in the liquid outlet pipe. The air bag is extruded by the high-pressure gas, so that the angle of the electrolyte in the liquid reservoir entering the cell stack can be changed at will, the requirements of activation and use at different angles are met, and the application range of the zinc-silver reserve cell is expanded.

Description

Technical Field

[0001] This utility model relates to an omnidirectional activation structure for zinc-silver batteries. Background Technology

[0002] Zinc-silver battery banks are power sources used in the aerospace field. The specific application of these fields directly demands that the batteries possess characteristics such as high output voltage accuracy, small size, and diverse operating modes. Zinc-silver battery banks are aqueous solution-based batteries, and traditional zinc-silver battery banks have an unsealed structure. During battery activation, a mixture of high-pressure gas and electrolyte enters each individual cell through a distribution system. Due to gravity, the electrolyte accumulates at the lower position of the cell, while air and gases from the electrolyte rise upwards through the exhaust system and are expelled from the cell. Because of gravity, the battery bank is generally activated in an upright position or at a small angle of offset. Activating the battery bank at an angle exceeding 10° results in a larger amount of residual electrolyte in the reservoir, leading to insufficient electrolyte entering the battery bank and uneven electrolyte distribution within each individual cell. This affects battery performance and fails to meet power supply requirements, thus limiting the activation angle of zinc-silver battery banks. For example, CN202103124U discloses a coil-type electrolyte storage device, which stores the electrolyte in a coil and uses high-pressure gas generated by ignition to force the electrolyte into the battery stack, thereby avoiding the influence of gravity on electrolyte distribution. However, its coil is a fixed structure, and there is no gas-liquid isolation between the coil and the battery stack, allowing high-pressure gas to enter the battery stack and affecting battery performance. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides an omnidirectional activation structure for zinc-silver batteries.

[0004] This utility model is achieved through the following technical solution.

[0005] This utility model provides an omnidirectional activation structure for a zinc-silver battery, comprising: a reservoir and a battery stack;

[0006] The liquid reservoir includes a hemispherical upper cover, an air bladder, and a bottom shell. The air bladder is placed inside the upper cover, and the upper cover is inverted on the bottom shell. The hemispherical design facilitates the air bladder to flip over, ensuring that the electrolyte can be completely squeezed at any angle to avoid residue.

[0007] The top of the cover is equipped with an air inlet that connects to a high-pressure air source;

[0008] The bottom of the hemispherical bottom shell is equipped with an outlet pipe that connects to the battery stack, and the outlet pipe is equipped with a ruptureable membrane.

[0009] The battery stack includes a casing and individual battery cells. The casing has several cavities for housing the individual battery cells. The upper part of the casing has a connecting groove, and the lower end of the connecting groove has several diversion holes that connect to the housing cavities.

[0010] The volume of the accommodating cavity is larger than the volume of a single battery cell, and the ratio of the remaining space volume of all accommodating cavities to the liquid reservoir is ≥0.667.

[0011] The airbag is a rubber component, and its edge is fixed to the edge of the hemispherical upper cover, forming a gap between the airbag and the wall of the hemispherical upper cover.

[0012] The edge of the airbag is wrapped by the edge of the upper cover and fastened to the edge of the bottom shell by pressing.

[0013] One end of the liquid outlet pipe is flush with the inner wall of the bottom shell, and the part extending out of the bottom shell is provided with external threads.

[0014] The rupture membrane is a polytetrafluoroethylene sheet with a thickness of 0.1 to 0.2 mm, and a cross-shaped pre-cut line is processed in the center of the rupture membrane.

[0015] The depth of the pre-cut line is 50% to 70% of the thickness of the fragile film.

[0016] The connecting groove, the diversion hole, and the receiving cavity are integrally machined within the outer shell.

[0017] The beneficial effects of this invention are as follows: by squeezing the airbag with high-pressure gas, the angle at which the electrolyte in the reservoir enters the battery stack can be arbitrarily changed, which meets the requirements for activation at different angles and expands the application range of zinc-silver storage batteries. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram illustrating the activation principle of this utility model;

[0020] In the diagram: 1-Air inlet, 2-Upper cover, 3-Airbag, 4-Bottom shell, 5-Easily ruptured membrane, 6-Liquid outlet pipe, 7-Connecting groove, 8-Diverter hole, 9-Outer shell, 10-Single cell. Detailed Implementation

[0021] The technical solution of this utility model is further described below, but the scope of protection is not limited to what is described.

[0022] A zinc-silver battery omnidirectional activation structure; comprising: a reservoir and a battery stack;

[0023] The liquid reservoir includes: a hemispherical upper cover 2, an air bladder 3, and a bottom shell 4. The air bladder 3 is placed inside the upper cover, and the upper cover 2 is inverted on the bottom shell 4. The hemispherical design facilitates the air bladder to flip over, ensuring that the electrolyte can be completely squeezed at any angle to avoid residue.

[0024] The top of the upper cover 2 is provided with an air inlet 1 connected to a high-pressure gas source; the high-pressure gas pushes the air bag 3 evenly through the air inlet 1 to ensure that the electrolyte is injected into the battery stack quickly.

[0025] The bottom of the hemispherical bottom shell 4 is provided with an outlet pipe 6 that is connected to the battery stack. The outlet pipe 6 is provided with a ruptureable membrane 5. The ruptureable membrane 5 is precisely ruptured under high pressure to ensure that the electrolyte quickly enters the battery stack through the outlet pipe 6.

[0026] The battery stack includes a casing 9 and individual batteries 10. The casing 9 has several cavities for housing the individual batteries 10. The upper part of the casing 9 has a connecting groove 7, and the lower end of the connecting groove 7 has several diversion holes that are connected to the housing cavities respectively. The volume of the housing cavities is larger than the volume of the individual batteries. The ratio of the remaining space volume of all housing cavities to the liquid reservoir is ≥0.667. The liquid-to-air ratio limit ensures that there is no electrolyte residue when the airbag is completely flipped, and the pressure is evenly transmitted to each individual battery.

[0027] The airbag 3 is a rubber component, and its edge is fixed to the edge of the hemispherical upper cover 2, forming a gap between the airbag 3 and the wall of the hemispherical upper cover 2.

[0028] The edge of the airbag 3 is wrapped by the edge of the upper cover 2 and fastened to the edge of the bottom shell 4 by pressing tightly.

[0029] One end of the liquid outlet pipe 6 is flush with the inner wall of the bottom shell 4, and the part extending out of the bottom shell 4 is provided with external threads.

[0030] The fragile membrane 5 is a polytetrafluoroethylene sheet with a thickness of 0.1 to 0.2 mm, and a cross-shaped pre-cut line is processed in the center of the fragile membrane 5.

[0031] The depth of the pre-cut line is 50% to 70% of the thickness of the fragile film 5.

[0032] The connecting groove 7, the diversion hole 8, and the accommodating cavity are integrally formed within the outer shell 9.

[0033] The fully sealed battery pack uses a bladder-type electrolyte reservoir to store the electrolyte in a sealed container. The battery stack is also a sealed structure. During battery activation, high-pressure gas generated by the gas-generating device pushes an air bladder on one side of the reservoir. The air bladder then flips and squeezes the electrolyte stored in the reservoir into the battery stack (the activation process is similar to a piston-driven activation process, with gas and liquid belonging to different spatial volumes). Regardless of the angle, as long as the air bladder is completely flipped, there is almost no electrolyte residue left in the reservoir (see...). Figure 1 If the direction of gravity of the electrolyte is consistent with the direction of electrolyte discharge, there is almost no residue in the reservoir. The activation process simply involves injecting the electrolyte into the battery stack. Regardless of whether the battery is sealed, as long as the volume of the cavity can accommodate the electrolyte, the battery pack can be activated and operate normally. If the direction of gravity of the electrolyte forms a certain angle with the direction of electrolyte discharge, if the battery stack is not sealed, the electrolyte distribution will be affected by gravity. However, in a sealed battery stack, the pressure in each cell cavity is almost uniform. According to the law of pressure balance, the injected electrolyte will be evenly distributed to each cell. Within each cell cavity, due to the sealed battery stack, the entry of electrolyte into the battery stack increases the internal pressure of the cell. When the compression exceeds two-thirds of the cavity volume, the airbag cannot fully rotate during angled activation, resulting in abnormal battery activation. To ensure that the electrolyte pushed by high-pressure compression can smoothly enter each cell, the electrolyte distribution during battery activation is basically unaffected by the angle. When the ratio of electrolyte volume to the remaining space volume of the battery is ≤0.667, the electrolyte distribution during battery activation is unaffected by the angle, and the electrolyte is evenly distributed, enabling omnidirectional activation and external power supply.

Claims

1. An omnidirectional activation structure for a zinc-silver battery, characterized by, The utility model relates to a kind of battery pack and liquid storage tank, including: Liquid storage tank and battery pack; The liquid storage tank includes: upper cover (2) that is all hemispherical, air bag (3), bottom shell (4), the air bag (3) is placed in upper cover, upper cover (2) is inverted on bottom shell (4), The top of upper cover (2) is equipped with air inlet (1) and high-pressure gas source connection; The bottom of hemispherical bottom shell (4) is equipped with liquid outlet pipe (6) and battery pack connection, liquid outlet pipe (6) is equipped with breakable membrane (5) in it; The battery pack includes shell (9) and single battery (10), several accommodating cavities are processed in shell (9) to install single battery (10), the upper portion of shell (9) is processed with intercommunication groove (7), the lower end of intercommunication groove (7) is processed with several shunt holes respectively connected with accommodating cavity; The volume of the accommodating cavity is greater than the volume of single battery, the ratio of the residual space volume of all accommodating cavities and the liquid storage tank is greater than or equal to 0.

667.

2. The omnidirectional activation structure of the zinc-silver battery according to claim 1, characterized in that: The air bag (3) is rubber part, its edge is fixed to the edge of hemispherical upper cover (2), and the gap is formed between air bag (3) and the wall surface of hemispherical upper cover (2).

3. The omnidirectional activation structure of the zinc-silver battery of claim 2, characterized by: The edge of air bag (3) is wrapped by the edge of upper cover (2), and is buckled on the edge of bottom shell (4) by the way of tight pressing.

4. The omnidirectional activation structure of the zinc-silver battery of claim 1, characterized by: One end of the liquid outlet pipe (6) is flush with the inner wall of bottom shell (4), and the part of liquid outlet pipe (6) extending out of bottom shell (4) is equipped with external thread.

5. The omnidirectional activation structure of the zinc-silver battery of claim 1, characterized by: The breakable membrane (5) is polytetrafluoroethylene plate with thickness of 0.1-0.2mm, and cross-shaped pre-cut line is processed in the center of breakable membrane (5).

6. The omnidirectional activation structure of the zinc-silver battery of claim 5, characterized by the fact that: The depth of the pre-cut line is 50%-70% of the thickness of breakable membrane (5).

7. The omnidirectional activation structure of the zinc-silver battery of claim 1, characterized by: The intercommunication groove (7), shunt hole (8) and accommodating cavity are integrally processed in shell (9).

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