High-strength protective diaphragm device for aqueous zinc ion battery

Abstract

The utility model discloses a high-strength protective diaphragm device for an aqueous zinc ion battery, which comprises a positive shell, a groove is formed in the center of the bottom of the inner side of the positive shell, a positive plate is mounted in the groove, and a diaphragm component is arranged at the top of the positive plate. According to the utility model, the two diaphragms are arranged and are connected through the connecting diaphragm plate, so that the thickness of the diaphragms is increased, and the possibility that the diaphragms can be completely punctured by zinc dendritic crystals can be preliminarily reduced; and once the zinc dendritic crystal punctures the diaphragm plate II and then punctures the connecting diaphragm plate, the electrolyte additive made of the saccharin material and filled in the connecting diaphragm plate can be released to be mixed with the electrolyte, so that the growth of the zinc dendritic crystal can be inhibited, and the possibility that the zinc dendritic crystal completely punctures the diaphragm is further reduced. The diaphragm prepared from the PI material and the PP material has high-strength mechanical properties, and zinc dendritic crystals are difficult to puncture.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a high-strength protective diaphragm device for aqueous zinc-ion batteries. Background Technology

[0002] Aqueous zinc-ion batteries are a novel type of secondary battery system that uses metallic zinc as the negative electrode. On the surface of the zinc metal negative electrode, zinc ions are usually deposited non-uniformly, resulting in a large amount of zinc ions deposited locally, forming zinc dendrites. Zinc dendrites will eventually puncture the separator, causing a short circuit in the battery. Therefore, the electrochemical performance of aqueous zinc-ion batteries is affected by the formation of zinc dendrites.

[0003] Traditional aqueous zinc-ion batteries typically use glass fiber separators. However, the irregular pore structure of glass fiber separators cannot suppress the formation of zinc dendrites, which may eventually cause zinc dendrites to pierce the separator, leading to a short circuit between the positive and negative electrodes. In addition, glass fiber separators have a high cost.

[0004] Therefore, it is necessary to provide a high-strength protective diaphragm device for aqueous zinc-ion batteries to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to provide a high-strength protective membrane device for aqueous zinc-ion batteries to solve the problems existing in the background technology. The technical solution of this utility model provides a solution that is significantly different from the existing technology, which is aimed at the problem that the existing technical solutions are too simple.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-strength protective diaphragm device for aqueous zinc-ion batteries, comprising a positive electrode shell, a groove formed at the center of the bottom inner side of the positive electrode shell, a positive electrode plate installed inside the groove, a diaphragm assembly disposed on the top of the positive electrode plate, a negative electrode plate disposed on the top of the diaphragm assembly, a gasket disposed on the top of the negative electrode plate, and a negative electrode shell disposed on the top of the gasket.

[0007] Preferably, the diaphragm assembly includes a first diaphragm plate disposed on top of the positive electrode plate, a connecting membrane plate connected to the top center of the first diaphragm plate, and a second diaphragm plate connected to the top of the connecting membrane plate.

[0008] Preferably, the interior of the connecting membrane is filled with an electrolyte additive made of saccharin.

[0009] Preferably, the first diaphragm plate is made of PI material, and the second diaphragm plate is made of PP material.

[0010] Preferably, a limiting rod is installed at an equal angle at the top center of the second diaphragm plate, and the outer wall of the limiting rod abuts against the outer side of the negative electrode plate.

[0011] Preferably, the top of the limiting rod is provided with a slot, and a locking rod fixed to the bottom of the pad is engaged inside the slot.

[0012] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention features two types of diaphragms connected by a connecting plate, increasing the diaphragm thickness and initially reducing the likelihood of zinc dendrites completely piercing the diaphragm. The connecting plate is filled with a saccharin-based electrolyte additive; if a zinc dendrite pierces the second diaphragm and then the connecting plate, the saccharin-based electrolyte additive will be released and mixed with the electrolyte, thus inhibiting zinc dendrite growth and further reducing the possibility of zinc dendrites completely piercing the diaphragm. The diaphragms, made of PI and PP materials, possess high mechanical strength, making them difficult for zinc dendrites to penetrate. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is a partial view of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the upper part of the diaphragm assembly of this utility model;

[0018] Figure 4 This is a separation diagram of the diaphragm assembly of this utility model.

[0019] In the diagram: 1. Positive electrode shell; 2. Groove; 3. Positive electrode plate; 4. Separator assembly; 401. Separator plate one; 402. Connecting membrane plate; 403. Separator plate two; 5. Negative electrode plate; 6. Gasket; 7. Negative electrode shell; 8. Limiting rod; 9. Slot; 10. Locking rod. Detailed Implementation

[0020] 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.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will be described below based on its overall structure.

[0022] Please see Figure 1-4 A high-strength protective diaphragm device for an aqueous zinc-ion battery includes a positive electrode housing 1, a groove 2 is formed at the center of the bottom inner side of the positive electrode housing 1, a positive electrode plate 3 is installed inside the groove 2, a diaphragm assembly 4 is arranged on the top of the positive electrode plate 3, a negative electrode plate 5 is arranged on the top of the diaphragm assembly 4, a gasket 6 is installed on the top of the negative electrode plate 5, and a negative electrode housing 7 is installed on the top of the gasket 6.

[0023] like Figure 1-4 As shown, the diaphragm assembly 4 includes a first diaphragm plate 401 disposed on top of the positive electrode plate 3. A connecting membrane plate 402 is connected to the top center of the first diaphragm plate 401, and a second diaphragm plate 403 is connected to the top of the connecting membrane plate 402. By providing two types of diaphragms and connecting them with the connecting membrane plate 402, the thickness of the diaphragm is increased, which can initially reduce the possibility that zinc dendrites can completely puncture the diaphragm.

[0024] like Figure 1-4 As shown, the interior of the connecting membrane plate 402 is filled with an electrolyte additive made of saccharin. By filling the interior of the connecting membrane plate 402 with an electrolyte additive made of saccharin, once the zinc dendrite pierces the second diaphragm plate 403 and then pierces the connecting membrane plate 402, the electrolyte additive made of saccharin filled inside the connecting membrane plate 402 will be released and mixed with the electrolyte, thereby inhibiting the growth of zinc dendrites and further reducing the possibility of zinc dendrites completely piercing the diaphragm.

[0025] like Figure 1-4As shown, diaphragm plate 401 is made of PI material and diaphragm plate 403 is made of PP material. The diaphragms made of PI and PP materials have high mechanical strength and are difficult for zinc dendrites to puncture.

[0026] like Figure 1-4 As shown, a limiting rod 8 is installed at an equal angle at the top center of the diaphragm plate 403, and the outer wall of the limiting rod 8 abuts against the outer side of the negative electrode plate 5. The installation of the negative electrode plate 5 can be positioned by the limiting rod 8, which facilitates the quick positioning and installation of the negative electrode plate 5.

[0027] like Figure 1-4 As shown, a slot 9 is provided at the top of the limiting rod 8. The slot 9 is engaged with a locking rod 10 fixed to the bottom of the pad 6. The slot 9 and locking rod 10 facilitate the installation of the pad 6 on the top of the negative electrode plate 5.

[0028] Working principle: In use, two types of diaphragms are set and connected by a connecting plate 402, which increases the thickness of the diaphragms and initially reduces the possibility that zinc dendrites can completely puncture the diaphragms. By filling the inside of the connecting plate 402 with an electrolyte additive of saccharin material, once a zinc dendrite punctures the second diaphragm plate 403 and then punctures the connecting plate 402, the electrolyte additive of saccharin material filled inside the connecting plate 402 will be released and mixed with the electrolyte, thereby inhibiting the growth of zinc dendrites and further reducing the possibility that zinc dendrites can completely puncture the diaphragms. The diaphragms made of PI and PP materials have high mechanical strength, making it difficult for zinc dendrites to puncture. The limiting rod 8 can position the installation of the negative electrode plate 5, which is convenient for the quick positioning and installation of the negative electrode plate 5. The slot 9 and the locking rod 10 facilitate the installation of the gasket 6 on the top of the negative electrode plate 5.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-strength protective diaphragm device for aqueous zinc-ion batteries, comprising a positive electrode housing (1), characterized in that: The positive electrode housing (1) has a groove (2) at the center of the bottom inside. A positive electrode plate (3) is installed inside the groove (2). A diaphragm assembly (4) is provided on the top of the positive electrode plate (3). A negative electrode plate (5) is provided on the top of the diaphragm assembly (4). A gasket (6) is installed on the top of the negative electrode plate (5). A negative electrode housing (7) is installed on the top of the gasket (6).

2. The high-strength protective diaphragm device for aqueous zinc-ion batteries according to claim 1, characterized in that: The diaphragm assembly (4) includes a first diaphragm plate (401) disposed on the top of the positive electrode plate (3), a connecting membrane plate (402) is connected to the top center of the first diaphragm plate (401), and a second diaphragm plate (403) is connected to the top of the connecting membrane plate (402).

3. The high-strength protective diaphragm device for aqueous zinc-ion batteries according to claim 2, characterized in that: The interior of the connecting membrane plate (402) is filled with an electrolyte additive made of saccharin.

4. The high-strength protective diaphragm device for aqueous zinc-ion batteries according to claim 2, characterized in that: The first diaphragm plate (401) is made of PI material, and the second diaphragm plate (403) is made of PP material.

5. A high-strength protective diaphragm device for an aqueous zinc-ion battery according to claim 2, characterized in that: A limiting rod (8) is installed at an equal angle at the top center of the second diaphragm plate (403), and the outer wall of the limiting rod (8) abuts against the outer side of the negative electrode plate (5).

6. A high-strength protective diaphragm device for an aqueous zinc-ion battery according to claim 5, characterized in that: The top of the limiting rod (8) is provided with a slot (9), and the slot (9) is engaged with a rod (10) fixed to the bottom of the pad (6).

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