Automatic protection device for high temperature of zinc ion battery

Abstract

The utility model discloses an automatic protection device for high temperature of a zinc ion battery, which comprises a positive pole shell, a groove is arranged at the center of the bottom of the inner side of the positive pole shell, and a positive pole plate is arranged in the groove. The positive plate and the negative plate are communicated through the formed through hole and the center hole, electrolyte is injected into the positive shell and can be in contact with the positive plate and the negative plate at the same time, and in the charging and discharging process of the battery, heat generated in the shell is higher and higher, so that the temperature in the shell is increased; when the temperature rises to a certain temperature, the deformation temperature of the bimetallic strip can be reached, the bimetallic strip deforms and shrinks to drive the diaphragm plate II to move downwards to abut against the top of the diaphragm plate I, the through hole is blocked by the diaphragm plate I, and the positive plate and the negative plate cannot be simultaneously connected during electrolyte separation, so that the charging and discharging work of the battery is stopped, and the temperature is prevented from continuously rising; the safety performance of the battery in the working process is greatly improved, and after the temperature is reduced, the bimetallic strip is reset.

Description

Technical Field

[0001] This utility model relates to the field of zinc-ion battery technology, specifically to an automatic protection device for zinc-ion batteries at high temperatures. Background Technology

[0002] Aqueous zinc-ion batteries are a new type of rechargeable battery system that uses metallic zinc as the negative electrode. Compared to lithium-ion batteries, aqueous zinc-ion batteries use an aqueous solution as the electrolyte, avoiding the hazards caused by electrolyte combustion. Secondly, compared to metallic lithium, metallic zinc has a lower cost, reducing the cost of the battery. In addition, aqueous zinc-ion batteries also have a high capacity. Therefore, aqueous zinc-ion batteries are a new type of battery with great potential.

[0003] In aqueous zinc-ion batteries, zinc ions migrate between the positive and negative electrodes during charging and discharging, thus realizing the charging and discharging reaction of the battery. This process generates a lot of heat, which can easily lead to heat damage to the battery and poses certain safety hazards.

[0004] Therefore, it is necessary to provide an automatic protection device for zinc-ion batteries at high temperatures to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to provide an automatic protection device for zinc-ion batteries at high temperatures, so as 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: an automatic protection device for high-temperature 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 mechanism provided on the top of the positive electrode plate, a negative electrode plate installed on the top of the diaphragm mechanism, and a negative electrode shell installed on the top of the positive electrode shell.

[0007] Preferably, the diaphragm mechanism includes a diaphragm plate one installed on the top of the positive electrode plate, a central hole is provided at the top center of the diaphragm plate one, slots are provided at the four corners of the diaphragm plate one, a bimetallic strip is installed inside the slots, a diaphragm plate two is connected to the top of the bimetallic strip, and through holes are provided at equal intervals at both ends of the top of the diaphragm plate two.

[0008] Preferably, the top center of the second diaphragm plate has a fixing hole for engaging with the negative electrode plate, and the top of the negative electrode plate is higher than the top of the second diaphragm plate.

[0009] Preferably, the top of the second diaphragm plate is provided with a locking hole at an equal angle, and a fixing rod is installed inside the locking hole. The top of the fixing rod is connected to a gasket whose bottom abuts against the top of the negative electrode plate.

[0010] Preferably, mounting bases are installed at the four inner corners of the positive electrode housing, and mounting rods fixed to the four bottom corners of the negative electrode housing are installed on the inner side of the mounting bases.

[0011] Preferably, the front end face of the positive electrode shell is provided with an injection hole, and a plugging block is installed inside the injection hole.

[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 connects the positive and negative plates through the through holes and the central hole. When the electrolyte is injected into the positive electrode shell, it can contact both the positive and negative plates simultaneously. During the charging and discharging process of the battery, the heat generated inside the shell increases, causing the internal temperature of the shell to rise. When the temperature rises to a certain point, it reaches the deformation temperature of the bimetallic strip. At this time, the bimetallic strip deforms and contracts, causing the second separator to move downward and abut against the top of the first separator. At this time, the through hole is blocked by the first separator, and the electrolyte separation cannot connect the positive and negative plates simultaneously, causing the battery charging and discharging to stop and preventing the temperature from rising further. This greatly improves the safety performance of the battery during operation. After the temperature drops, the bimetallic strip resets.

[0015] This invention features a negative electrode plate with its top higher than the top of the separator plate, facilitating contact with the electrolyte. The injection hole allows for electrolyte injection after the battery structure is assembled, preventing electrolyte overflow and waste. It also facilitates operation when the electrolyte needs to be replaced later. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present utility model;

[0017] Figure 2 This is a perspective view of the blockage block and injection hole of this utility model separated;

[0018] Figure 3 This is a cross-sectional three-dimensional structural diagram of the present invention;

[0019] Figure 4 This is an exploded separation diagram of this utility model;

[0020] Figure 5 This is a schematic diagram of the explosion separation structure of the diaphragm mechanism of this utility model.

[0021] In the diagram: 1. Positive electrode shell; 2. Groove; 3. Positive electrode plate; 4. Separator mechanism; 401. Separator plate one; 402. Center hole; 403. Slot; 404. Bimetallic strip; 405. Separator plate two; 406. Through hole; 5. Negative electrode plate; 6. Negative electrode shell; 7. Fixing hole; 8. Clip hole; 9. Fixing rod; 10. Gasket; 11. Mounting base; 12. Mounting rod; 13. Injection hole; 14. Blocking block. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] Please see Figure 1-5 An automatic protection device for high temperature of zinc-ion batteries includes a positive electrode shell 1, a groove 2 is provided at the center of the bottom of the inner side of the positive electrode shell 1, a positive electrode plate 3 is installed inside the groove 2, a diaphragm mechanism 4 is provided on the top of the positive electrode plate 3, a negative electrode plate 5 is installed on the top of the diaphragm mechanism 4, and a negative electrode shell 6 is installed on the top of the positive electrode shell 1.

[0025] like Figure 1-5As shown, the diaphragm mechanism 4 includes a diaphragm plate 401 mounted on top of the positive electrode plate 3. A central hole 402 is formed at the center of the top of the diaphragm plate 401. Grooves 403 are formed at the four corners of the diaphragm plate 401. A bimetallic strip 404 is installed inside the grooves 403. A second diaphragm plate 405 is connected to the top of the bimetallic strip 404. Through holes 406 are equidistantly formed at both ends of the top of the second diaphragm plate 405. The through holes 406 and the central hole 402 allow the positive electrode plate 3 and the negative electrode plate 5 to communicate. Electrolyte injected into the positive electrode housing 1 can simultaneously interact with the positive electrode plate. 3. When the negative plate 5 is in contact, the heat generated inside the casing increases during the charging and discharging process, causing the internal temperature of the casing to rise. When the temperature rises to a certain level, it can reach the deformation temperature of the bimetallic strip 404. At this time, the bimetallic strip 404 deforms and contracts, causing the second separator 405 to move downward and abut against the top of the first separator 401. At this time, the through hole 406 is blocked by the first separator 401, and the electrolyte separation cannot connect the positive plate 3 and the negative plate 5 at the same time, so that the charging and discharging of the battery stops, preventing the temperature from rising further and greatly improving the safety performance of the battery during operation.

[0026] like Figure 1-5 As shown, a fixing hole 7 is provided at the top center of the second diaphragm plate 405 to engage with the negative electrode plate 5. The top of the negative electrode plate 5 is higher than the top of the second diaphragm plate 405. The top of the negative electrode plate 5 being higher than the top of the second diaphragm plate 405 facilitates contact with the electrolyte.

[0027] like Figure 1-5 As shown, the top of the diaphragm plate 405 is provided with locking holes 8 at equal angles. A fixing rod 9 is installed inside the locking hole 8. The top of the fixing rod 9 is connected to a pad 10 whose bottom abuts against the top of the negative electrode plate 5. The pad 10 is used to fix the position of the negative electrode plate 5 and prevent it from falling off the fixing hole 7.

[0028] like Figure 1-5 As shown, mounting bases 11 are installed at the four inner corners of the positive electrode housing 1, and mounting rods 12 fixed to the four bottom corners of the negative electrode housing 6 are installed on the inner side of the mounting bases 11. The mounting bases 11 and mounting rods 12 facilitate the installation of the negative electrode housing 6 on the top of the positive electrode housing 1.

[0029] like Figure 1-5 As shown, an injection hole 13 is provided on the front end face of the positive electrode shell 1. A plugging block 14 is installed inside the injection hole 13. The electrolyte can be injected after the battery structure is installed through the injection hole 13, avoiding the overflow and waste of electrolyte, and facilitating operation when the electrolyte needs to be replaced later.

[0030] Working principle: During use, the positive electrode plate 3 and the negative electrode plate 5 are connected through the through hole 406 and the central hole 402. Electrolyte injected into the positive electrode casing 1 can simultaneously contact both the positive electrode plate 3 and the negative electrode plate 5. During battery charging and discharging, the heat generated inside the casing increases, causing the internal temperature to rise. When the temperature reaches a certain point, it reaches the deformation temperature of the bimetallic strip 404. At this point, the bimetallic strip 404 deforms and contracts, causing the second separator plate 405 to move downwards and abut against the top of the first separator plate 401. At this time, the through hole 406 is blocked by the first separator plate... When 401 is blocked, the electrolyte separation prevents the simultaneous connection of the positive plate 3 and the negative plate 5, causing the battery charging and discharging to stop, preventing the temperature from rising further, and greatly improving the safety performance of the battery during operation. After the temperature drops, the bimetallic strip 404 resets. The top of the negative plate 5 is set higher than the top of the separator plate 405 to facilitate contact with the electrolyte. The injection hole 13 allows the electrolyte to be injected after the battery structure is installed, avoiding electrolyte overflow and waste, and also facilitating operation when the electrolyte needs to be replaced later.

[0031] 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. An automatic protection device for high-temperature zinc-ion batteries, comprising a positive electrode casing (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 mechanism (4) is provided on the top of the positive electrode plate (3). A negative electrode plate (5) is installed on the top of the diaphragm mechanism (4). A negative electrode housing (6) is installed on the top of the positive electrode housing (1).

2. The automatic protection device for high-temperature zinc-ion batteries according to claim 1, characterized in that: The diaphragm mechanism (4) includes a diaphragm plate one (401) installed on the top of the positive electrode plate (3). A central hole (402) is provided at the top center of the diaphragm plate one (401). Slots (403) are provided at the four corners of the diaphragm plate one (401). A bimetallic strip (404) is installed inside the slot (403). A diaphragm plate two (405) is connected to the top of the bimetallic strip (404). Through holes (406) are provided at equal intervals at both ends of the top of the diaphragm plate two (405).

3. The automatic protection device for high-temperature zinc-ion batteries according to claim 2, characterized in that: The top center of the second diaphragm plate (405) is provided with a fixing hole (7) that engages with the negative electrode plate (5), and the top of the negative electrode plate (5) is higher than the top of the second diaphragm plate (405).

4. The automatic protection device for high-temperature zinc-ion batteries according to claim 2, characterized in that: The top of the second diaphragm plate (405) is provided with a locking hole (8) at an equal angle. A fixing rod (9) is installed inside the locking hole (8). The top of the fixing rod (9) is connected to a gasket (10) whose bottom abuts against the top of the negative electrode plate (5).

5. The automatic protection device for high-temperature zinc-ion batteries according to claim 1, characterized in that: Mounting bases (11) are installed at the four inner corners of the positive electrode housing (1), and mounting rods (12) fixed to the four bottom corners of the negative electrode housing (6) are installed on the inner side of the mounting bases (11).

6. The automatic protection device for high-temperature zinc-ion batteries according to claim 1, characterized in that: The front end face of the positive electrode shell (1) is provided with an injection hole (13), and a plugging block (14) is installed inside the injection hole (13).

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