Protective patch structure of explosion-proof valve

Abstract

The utility model relates to the technical field of batteries, in particular to an explosion-proof valve protection patch structure. The waterproof patch comprises a waterproof patch body, a fixed bottom edge is arranged on the edge of the bottom of the waterproof patch body, a cross is arranged in the fixed bottom edge, a supporting rod is arranged in the middle of the top of the cross, the supporting rod abuts against the bottom of the waterproof patch body, and an adhesive layer is arranged at the bottom of the fixed bottom edge. A plurality of mastoids are distributed at the top of the waterproof patch, each mastoid is wrapped with a wax crystal, and the waterproof patch is further provided with a plurality of micropores. The waterproof patch is in the shape of an arched cover through the supporting rod, an efficient waterproof lyophobic system is constructed in cooperation with the mastoid process and the wax crystal which are designed according to the bionic lotus leaf principle, the arched shape guides liquid to slide down through gravity, the mastoid process and the wax crystal enable electrolyte to form water drops at the moment of making contact with the patch by means of the super-lyophobic characteristic, and the water drops rapidly roll down. Residue is avoided, electrolyte is prevented from corroding the explosion-proof valve, and stable performance of the explosion-proof valve is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a protection patch structure of explosion -proof valve. BACKGROUND

[0002] In the field of modern electronic equipment and energy storage, the application of secondary batteries is extremely wide, from portable electronic equipment to electric vehicles, and its safety is directly related to the reliable operation of the equipment and the safety of the user. In order to protect the safety of secondary batteries under complex working conditions, installing explosion-proof valves on the battery top cover becomes a key safety protection measure. When the secondary battery encounters improper charging, short circuit or is in a harsh environment such as high temperature, complex electrochemical reactions will occur inside, resulting in the generation of a large amount of gas and a sharp rise in temperature. At this time, the explosion-proof valve can be opened when the gas pressure reaches a certain level, releasing the internal pressure, thereby effectively avoiding serious safety accidents such as explosion of the battery due to excessive internal pressure, greatly improving the safety performance of the battery.

[0003] However, the explosion-proof valve is at risk of being corroded by electrolyte in actual use, which will reduce its reliability and service life, and thus affect the overall safety performance of the battery. To solve this problem, the prior art usually pastes a protection patch above the explosion-proof valve. At the same time, in order to ensure that the gas pressure above the explosion-proof valve is balanced with the atmospheric pressure, a hole needs to be opened on the protection patch. At present, the design of the explosion-proof valve protection patch mainly has these two ways: adding a hole in the middle of the protection patch or increasing a boss around the hole. However, both of these two ways have obvious defects: first, the middle hole is too large, which will increase the probability of electrolyte passing through the vent hole; while the hole is too small, particles in the electrolyte are easy to accumulate, thereby blocking the vent hole and failing to achieve the expected effect of balancing the gas pressure; second, the existing design cannot effectively prevent electrolyte from flowing from the vent hole to the explosion-proof valve, thereby causing corrosion to the explosion-proof valve. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a protection patch structure of explosion-proof valve to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme, it includes waterproof patch, waterproof patch bottom edge is provided with fixed bottom edge, the cross in fixed bottom edge is provided with, the cross top middle is provided with the support rod, the support rod top is established in waterproof patch bottom, fixed bottom edge bottom is provided with the sticky glue layer.

[0006] As the preferred scheme of the utility model, the waterproof patch top is distributed with several papillae, and wax crystals are wrapped on each papillae, and several micro holes are also opened on the waterproof patch.

[0007] As the preferred scheme of the utility model, the diameter of the micro hole is 0.15 microns.

[0008] Compared with the prior art, the above technical scheme of the utility model has the following beneficial technical effects:

[0009] 1、The utility model discloses a waterproof patch is arched by the support rod, cooperates the papilla and the waxy crystal of bionic lotus leaf principle design, constructs efficient waterproof liquid -repellent system, arched shape uses gravity to guide liquid to slide down, and the papilla and waxy crystal form water bead and quickly roll down in the instant of contact patch with super liquid -repellent characteristics, avoid remaining, prevent electrolyte from eroding explosion -proof valve, ensure its performance stability.

[0010] 2、The utility model discloses a fixed bottom edge of waterproof patch bottom edge cooperates the cross structure in the inside, forms the stable support frame, and the fixed bottom edge ensures the installation position stability of whole device on explosion -proof valve, is not easy to shift;Cross enhances the strength of fixed bottom edge, makes it can bear certain external force and not deformed, provides reliable foundation for support rod and waterproof patch, guarantees protection device to work normally in the complex use environment of battery all the time. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the whole structure schematic diagram of the utility model;

[0012] Figure 2 It is the whole bottom structure schematic diagram of the utility model;

[0013] Figure 3 It is the structure schematic diagram when the utility model is unfolded;

[0014] Figure 4 It is Figure 1 The enlarged view of A in the middle;

[0015] Figure 5 It is the waterproof patch sectional view schematic diagram of the utility model.

[0016] Fig. 1 is a waterproof patch, 10 is a papilla, 11 is a waxy crystal, 12 is a micro-pore, 2 is a fixed bottom edge, 20 is a cross, 21 is a support rod, 3 is a sticky glue layer. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantage of the utility model more clear and obvious, the utility model is explained in further detail below in combination with specific implementation manners and with reference to the drawings. It should be understood that these descriptions are only exemplary, and are not intended to limit the scope of the utility model. In addition, in the following description, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.

[0018] As Figures 1-5As shown, the utility model discloses a kind of protection patch structures of explosion-proof valve, mainly including waterproof patch 1, waterproof patch 1 bottom edge, design has fixed bottom edge 2, its role is to stabilize the whole structure, in fixed bottom edge 2 inside, be equipped with cross 20 structure, cross 20 not only enhance the support strength of fixed bottom edge 2, also provide stable foundation for subsequent support components;

[0019] In the central position of cross 20 top, it is equipped with a bracing piece 21, and the top end of the bracing piece 21 is tightly arranged at the bottom of the waterproof patch 1. It is worth mentioning that the key role of the bracing piece 21 is that it can make the waterproof patch 1 present an arched cover shape. This unique arched shape, combined with the several papillae 10 evenly distributed on the top of the waterproof patch 1, can jointly exert strong protection efficiency.

[0020] The bottom of the fixed bottom edge 2 is coated with an adhesive layer 3. The adhesive layer has good adhesion, which can firmly adhere the whole structure to the designated position above the explosion-proof valve, tightly fit, prevent foreign matter and electrolyte from entering the gap, and cause damage to the explosion-proof valve.

[0021] The top of the waterproof patch 1 is evenly distributed with several papillae 10. These papillae 10 are designed using the principle of biomimetic lotus leaf. The micro-nano structure on the surface of the lotus leaf makes it super-hydrophobic. Water droplets on the lotus leaf can form a nearly perfect spherical shape and easily roll off, taking away the dust and other impurities on the surface. The papillae 10 in this structure imitate this characteristic, and each papilla 10 is wrapped with a wax crystal 11, further enhancing the liquid-repellent effect. This not only resists the erosion of electrolyte, but also uses surface tension to guide electrolyte, preventing it from accumulating on the surface of the waterproof patch 1.

[0022] In addition, several micro-pores 12 are provided on the waterproof patch 1, and the diameter of the micro-pores 12 is carefully designed to be 0.15 microns. This pore size can not only prevent particles in the electrolyte from passing through and avoid clogging the air vent, but also ensure that gas can pass through smoothly, achieving balance between the air pressure above the explosion-proof valve and the atmospheric pressure. This not only ensures the normal operation of the explosion-proof valve, but also improves the reliability and stability of the entire protection structure.

[0023] It should be understood that the above specific embodiments of the utility model are only used for illustrative or explanatory purposes, and do not constitute a limitation on the utility model. Therefore, any modification, equivalent replacement, improvement, etc. made without deviating from the spirit and scope of the utility model shall be included within the protection scope of the utility model. In addition, the appended claims of the utility model are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. An explosion-proof valve protection patch structure, comprising a waterproof patch (1), a fixed bottom edge (2) is arranged at the bottom edge of the waterproof patch (1), characterized in that: The fixed bottom edge (2) is internally provided with a cross (20), the top middle of which is provided with a support rod (21), the top of which is arranged on the bottom of the waterproof patch (1), and the bottom of the fixed bottom edge (2) is provided with a sticky adhesive layer (3).

2. The explosion valve protection patch structure of claim 1, wherein: The top of the waterproof patch (1) is distributed with a plurality of papillae (10), and each papilla (10) is wrapped with a wax crystal (11), and a plurality of micro-pores (12) are also formed on the waterproof patch (1).

3. The explosion valve protection patch structure of claim 2, wherein: The diameter of the micro-pores (12) is 0.15 microns.

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