A pressure relief bladder

Abstract

This invention relates to a discharge bag (1) which enables the redirection of high pressure and temperature gas inside the battery cell and its evacuation outside the cell to prevent an explosion when any thermal runaway occurs in battery packs containing lithium batteries in electric vehicles.

Description

1 TARIFF A pressure relief bladder Technical Area This invention is used in battery packs containing lithium batteries in electric vehicles. the battery cell when any thermal burn-in (thermal runaway) occurs directing the high-pressure and high-temperature gas inside and out of the cell. with a relief bag that prevents explosion by evacuating the contents It is related. 10 Previous Technique "Thermal runaway" occurs in battery packs such as lithium-ion batteries. This is a serious problem occurring in rechargeable batteries. This situation occurs when a cell's 15 It results from the acceleration of chemical reactions inside due to overheating. As these reactions accelerate, more heat is released, thus The chemical reactions and heat within the cell form a self-sustaining cycle. This If the process gets out of control, the cell can explode or catch fire. Thermal propagation is the thermal runaway that starts in a cell. This means the process can spread to neighboring cells. This is the battery pack's It can also affect other cells inside and cause the cells to overheat, This can cause an explosion or fire. Thermal runaway, This can cause batteries to explode or catch fire. This is serious for people. This poses a physical hazard, especially in vehicles that use batteries or those with 25... On mobile devices, this type of security threat can reach much larger proportions. Burning or exploding batteries can cause environmental damage. They can lead to environmental pollution and... This can lead to the release of toxic substances. This situation affects waste management and the environment. This can pose a major problem in terms of protection. Damage resulting from thermal runaway. Batteries that are exposed to sunlight become unusable. This renders the product or system inoperable. 30 This can lead to delays and cause financial losses. Also, batteries... 2 Due to its lack of safety, the product sales may decrease. Thermal runaway Solutions to this problem are generally related to the electrochemical structure of the cell. It is not completely resolved, meaning the possibility of the fire spreading to other modules. It cannot be brought under control. Therefore, lithium batteries are used in battery packs in electric vehicles. Whenever thermal burn-in occurs, the high level inside the battery cell directing the gas at different pressures and temperatures and releasing it outside the cell. to prevent an explosion and to prevent the fire from spreading to other cells It appears that a mechanism is needed to allow it to pass. 10 United States Regulation US2023268613A1, which is included in the known state of the art. The patent document describes a battery insulation coating system. The invention described in the United States patent document is a battery device. and includes a battery cell pack containing many battery cells. Battery device 15 It also includes a structure placed on top of the battery cell pack; this structure is a It includes insulation material and a housing, battery cell pack and structure. It is arranged within a protective enclosure. At least one upper surface of the structure is resistant to heat and fire. It has durable properties. Insulation material, through the insulation material. It contains a series of weak areas or cuts that extend beyond the structure. The structure, the burning of a cell 20 In this case, a cell can be affected through a weak area or cut in the insulation material. It is designed to have a ventilation passage on top. Brief Description of the Invention The aim of this invention is to improve the performance of lithium batteries in battery packs used in electric vehicles. Whenever thermal burn-in occurs, the high level inside the battery cell directing the gas at different pressures and temperatures and releasing it outside the cell. to prevent an explosion and to prevent the fire from spreading to other cells The goal is to create a drainage sac that allows passage. 30 3 Another aim of this invention is to determine the location of the positive and negative poles of the cell. by strengthening the region, the cell in the event of a possible thermal burn. a series of conductive gases and particles at high temperature and pressure emanating from its poles or by causing a short circuit on the tabs of parallel connected cell groups, etc. a relief bag that prevents the cells from entering thermal combustion 5 to accomplish. Detailed Description of the Invention To achieve the purpose of this invention, a "Pressure Relief Bag" was created (attached 10). as shown in the figures, these figures are: Figure 1 shows a top view of a pressure relief pouch, which is the subject of the invention. Figure 2 shows a clear view of a pressure relief pouch, which is the subject of the invention. Figure 3; Stages of wrapping a pressure relief pouch, the subject of the invention, around a battery. 15 It is an appearance that shows. The parts shown in the figures are individually numbered, and these numbers... The corresponding answers are given below. 1. Pressure relief bag 2. Film-coated surface 3. Insulation coating 4. Negative cell pole 5. Positive cell pole 25 6. Roll coating 7. Cut film-coated surface A. Battery cell In electric vehicles, any 30 lithium battery packs contain lithium batteries. When thermal burnout occurs, the high pressure inside the battery pack and 4 directing the gas at high temperature and releasing it outside the cell to prevent an explosion. to prevent this situation and to prevent the fire from spreading to other cells a pressure relief bag (1) that allows passage; - film-coated surface that protects the battery by wrapping around the outer surface of the battery (2), - Wrapping and insulating the battery cell strip (tab) and providing electrical insulation 5 insulation coating (3), - negative cell pole (4), - positive cell pole (5), - Roll coating in which lithium-ion anode, cathode, and separator materials are wound. (6) and 10 - created by making cuts at specific points on the film-coated surface (2) and the location where it fits in the battery cell allows for gas release in case of fire. It contains at least one cut film coated surface (7) that provides. The subject of the invention is a pressure relief bag (1) with special lamination on aluminum foil 15 It is produced with an insulating film using techniques and lithium-ion batteries. It is structured to cover. In the preferred arrangement of the invention, pressure discharge bag (1) respectively polyamide, polyester-polyurethane based adhesive, aluminum foil, polyurethane-free adhesive, and polypropylene It is manufactured from layers of materials. 20 Industrial application of the invention The subject of the invention is the pressure relief bag (1) with a cut film coated surface (7) and battery 25 The material is weakened by making cuts in its sections. (Invention) the subject is the cut film coated surface (7) part of the pressure relief bag (1). aluminum using polyamide, polyester-polyurethane based adhesive. The cut in the foil is insulated, and the battery is protected in case of fire. The weakest point of the cell is the side surface of the cell - cut film-coated surface (7) 30 Therefore, high-temperature gases will primarily affect the polyester-polyurethane surface. It melts and allows gas to escape. Around these basic concepts, the subject of the invention is “A Pressure Relief Bag (1)” It is possible to develop a wide variety of related applications, and the invention is one of the five described herein. It cannot be limited to examples; it is essentially as stated in the requests.

Claims

6 REQUESTS 1. In electric vehicles, there are no issues with battery packs containing lithium batteries. when thermal burn occurs, the high level inside the battery cell directing the gas at different pressures and temperatures and releasing it outside the cell 5 by preventing an explosion and the fire from spreading to other cells. prevents it from splashing; -film-coated surface (2) that wraps around the outer surface of the battery and protects the battery. -wrapping and insulating the battery cell strip (tab) and electrically insulation coating (3), 10 -negative cell pole (4), -positive cell pole (5), -Roll coating in which lithium ion anode, cathode and separator materials are wrapped. (6) containing and -15 created by making cuts at specific points on the film-coated surface (2). and the location where it fits in the battery cell allows for gas release in case of fire. a characterized by having at least one cut film coated surface (7) pressure relief bag (1).

2. An insulated 20 using special lamination techniques on aluminum foil. It is produced with an energizing film and has the feature of coating lithium-ion batteries. A pressure relief bag as described in Claim 1 (1).

3. Polyamide, polyester-polyurethane based adhesive, aluminum foil, 25 consisting of polyurethane-free adhesive and polypropylene materials as in Claim 1 or 2, characterized by being made of layers a pressure relief bag (1).