A SACHET-TYPE LITHIUM-ION BATTERY CELL

Abstract

This invention relates to a pouch-type lithium-ion battery cell (1) which is reinforced with a non-flammable outer casing and contains a smart rupture line (9) which allows the gas to be discharged only from a designated point during thermal escape.

Description

1 TARIFF A SACHET-TYPE LITHIUM-ION BATTERY CELL Technical Area 5 This invention is reinforced with a non-combustible outer coating and prevents gas from escaping during thermal escape. Smart rupture line that allows discharge only from a designated point. It relates to a pouch-type lithium-ion battery cell. Previous Technique Lithium-ion pouch cell batteries offer high energy density and a flexible design. It is widely used due to its advantages. However, thermal escape (thermal In the case of a runaway, random tearing of pouch cells and uncontrolled gas release occurs. 15 The evacuation of lithium today poses serious fire and explosion risks. In ion pouch cell batteries, where do the cells go during thermal escape? It is not possible to predict when a rupture will occur. A random rupture could cause gas to leak into neighboring cells. This increases the risk of a chain reaction as a result of the uncontrolled movement of the gas. The way these hot gases escape causes them to spread to the surrounding cells and thermally 20 This causes the escape to accelerate. On the other hand, pouch containers... Made of flammable polymer, it ignites during thermal escape, causing a fire. It can trigger [the virus]. Therefore, nowadays lithium-ion pouch cells are used. the batteries should only rupture at a designated point and the gas should be released at a specified point. Solutions are needed to ensure they are directed to a safe area. 25 It is heard. Japanese patent number JP2011060755A, which is included in the prior art. in the document, an active thermal spread prevention system for battery packs It is mentioned. The invention concerns a battery cell subjected to thermal runaway conditions. If this occurs, it reduces the effects and the thermal runaway phenomenon in the battery pack. 2 an active thermal runaway inhibitor that prevents its spread to adjacent cells within. The goal is to provide this system. This system is located near the cells inside the battery pack. It includes a conduit containing at least one fluid located in a specific position. The conduit, in particular... It has multiple breakpoints near groups of cells, and each breakpoint a predetermined point 5 lower than the melting temperature of the conduit It is designed to break at high temperatures. When fracture occurs, inside the conduit The fluid present is discharged from this point. Brief Description of the Invention The aim of this invention is to create a gas-resistant outer coating material reinforced with a non-combustible coating. A smart rupture line that directs discharge only from a designated point. A pouch-type lithium-ion battery cell containing Fracture Guidance Lines (FGL). to accomplish. Another aim of the invention is to prevent random tearing of sac cells during thermal escape. and by preventing uncontrolled gas release, it prevents battery fires and explosions. The goal is to create a pocket-type lithium-ion battery cell that prevents blockage. Another aim of the invention is to improve safety in battery packs by reducing thermal runaway 20. minimizing heat transfer to neighboring cells during the process and reducing the risk of fire The goal is to create a pouch-type lithium-ion battery cell. Another aim of the invention is to develop electric vehicle batteries, energy storage systems, and a pouch-type lithium-ion battery used in portable electronic devices 25 The cell is to perform. Detailed Description of the Invention The "A Sachet Type Lithium-Ion 30" project was carried out to achieve the purpose of this invention. The "Battery Cell" is shown in the attached figures; these figures are: 3 Figure 1. Front view of a pouch-type lithium-ion battery cell, which is the subject of the invention. It is the appearance. Figure 2. Side view of a pouch-type lithium-ion battery cell, which is the subject of the invention. It is the appearance. 5 Figure 3. Top view of a pouch-type lithium-ion battery cell, the subject of the invention. It is the appearance. The parts shown in the figures are individually numbered, and these numbers... The corresponding answers are given below: 10 1. Battery cell 2. Cell container 3rd Edge 4. Anode output terminal 15 5. Cathode output terminal 6. Neck area 7. Electrode block 8. Insulation tape 9. Smart tear line 20 10. Transition zone Reinforced with a non-combustible outer coating, and allowing only the gas to escape during thermal escape. The invention describes a type of pouch that allows for evacuation from a designated point. lithium-ion battery cell (1), 25 -having thermally welded edges (3), at least one anode outlet end (4) and at least one at least one cell containing a cathode output end (5) and covered with a non-flammable film container (2), - at least two neck regions located at the anode and cathode exit ends of the cell vessel (2) (6), 30 4 - electrodes located inside the cell container (2) in a spiral or stacked arrangement containing and gas escape towards the neck region (6) with the onset of thermal leakage at least one electrode block to which it is directed (7), - located in the neck region (4) and preventing short circuits during thermal escape. a small amount of insulation tape (8) and 5 - located on the cell container (2), the gas that is released during thermal escape from the cell the electrode block (7) that ruptures due to the increase in pressure created in the container (2) through a discharge channel that starts in the neck region of the gas (6) at least one smart rupture guidance line that enables exit It contains lines - FGL) (9). 10 The subject of the invention is the cell container (2) in the pouch-type lithium-ion battery cell (1) ceramic on the outer surface to prevent the cell from catching fire during thermal escape or includes composite coating. Ceramic coating is preferred in this application. It is either alumina or silicon oxide. The composite coating, on the other hand, is polybenzimidazole (PBI) based 15 They are coatings. In the preferred application, the cell container (2) completely surrounds the electrode block (5). It includes welded edges (3) that make it leakproof. In the preferred application The smart tear line (9) can be positioned near the edges (3) 20 Cell container (2) anode outlet end which is the external connection point of the anode collector foil (4) and the cathode outlet end (5), which is the outer connection point of the cathode collector foil. It includes the anode outlet end (4) and the cathode outlet end (5) during the thermal escape of the flame. and reinforced to prevent damage from hot gas and made of fireproof material 25 It is covered. The neck region of the pouch-type lithium-ion battery cell (1) is the subject of the invention. (6) with the onset of thermal escape, gas pressure and mechanical stress intensify This area is the starting point of the gas vent. The gas vent is 30 meters long. It starts in the region and extends to the smart rupture line (9). Thus, the area is released from a single point by the rupture of the smart rupture line (9). It is being discharged. Thermally insulated composite is used as a gas discharge channel. materials or mechanically opened micro relief valves It can be used. Thus, from the gas neck region (6) to the smart rupture line. (9) is directed. 5 The subject of the invention is the electrode block in the pouch-type lithium-ion battery cell (1). (7) Includes anode, cathode and separator electrodes in a spiral or stacked manner. In thermal runaway, gas formation starts in the electrode block (7) and reaches the neck region. (6) is oriented correctly. In the preferred application of the invention, the electrode block (7) 10 a transition zone (10) through which the collector foils pass between the neck region (6) (10) is located. The transit zone in question (10) is used during gas discharge. It is insulated to prevent electrical short circuits. The subject of the invention is the insulation tape in the pouch-type lithium-ion battery cell (1) 15 (8) is a dielectric tape and prevents short circuits in the neck region (6). This prevents electrical short circuits during gas evacuation. The subject of the invention is the smart tear-resistant pouch-type lithium-ion battery cell (1). lines (9) are attenuated lines located in the shell (2) of the cell vessel and thermal 20 It ruptures due to the pressure created during the escape, allowing the gas to be released. Smart rupture lines (9) increase in pressure during thermal escape in the cell vessel (2) Microstructures that initiate rupture in the section determined in the cell shell (2) It includes the electrode block (5) just below the smart tear line (9). formed, directing to the neck region (6) and enabling the discharge of gas 25 There is a gas venting outlet where the end of the redirecting channel is located. This way, the gas can only escape from a designated safe area. Smart tear lines (9) are provided from the preferred application of the invention. The cell vessel (2) is created by laser microstructure etching technology. 6 The invention concerns thermal runaway in a pouch-type lithium-ion battery cell (1). With the onset of the cell container (2), the pressure and internal temperature in the cell container increase and the cell container Smart tear lines (9) located on (2) are starting to tear. Thus, the gas formed in the electrode block (7) passes through the smart rupture line (9). By evacuating it outside, the cell container (2) is prevented from catching fire. 5 During thermal runaway in the pouch-type lithium-ion battery cell (1) which is the subject of the invention The risk of accidental rupture is eliminated, and gas release is made controlled. and is directed to the desired area. Also, the cell shell (2) shell is inflamed. By making it more durable, safety is increased. Thus, the cell container has 10 by controlling thermal dissipation in the battery module cells It is protected. Based on these fundamental concepts, the invention is titled "A Pouch-Type Lithium-Ion Battery". It is possible to develop a wide variety of applications related to the “Cell (1)”, and the invention 15 This cannot be limited to the examples described here, but is primarily stated in the claims. It is like that.

Claims

7 REQUESTS 1. Reinforced with a non-combustible outer coating, and preventing gas escape during thermal release. only allows evacuation from a designated point, -having thermally welded edges (3), at least one anode outlet end (4) and at least one 5 at least one cell containing a cathode output end (5) and covered with a non-flammable film container (2), - at least two neck regions located at the anode and cathode exit terminals of the cell vessel (2) (6), - electrodes located inside the cell container (2) in a spiral or stacked arrangement 10 containing and gas escape towards the neck region (6) with the onset of thermal leakage at least one electrode block to which it is directed (7), - located in the neck region (4) and preventing short circuits during thermal escape. a small amount of insulation tape (8) and - located on the cell container (2), the gas that is released during thermal escape from the cell 15 the electrode block (7) that ruptures due to the increase in pressure created in the container (2) through a discharge channel that starts in the neck region of the gas (6) at least one smart rupture guidance line that enables exit A pouch-type lithium-ion battery cell characterized by Lines - FGL) (9) (1). 20 2. To prevent the cell from catching fire during thermal escape on its outer surface. characterized by a cell vessel containing ceramic or composite coating (2) A pouch-type lithium-ion battery cell as in Claim 1 (1).

3. Welded edges that completely seal around the electrode block (5) a pouch as in Claim 1 or 2 characterized by a cell container (2) containing (3). type lithium-ion battery cell (1).

4. The anode outlet end (4) and 30, which is the external connection point of the anode collector foil. containing the cathode outlet end (5), which is the external connection point of the cathode collector foil. 8 A pouch-type lithium- as in Claim 1 or 2, characterized by a cell container (2). ion battery cell (1).

5. To prevent damage from flames and hot gas during thermal escape. Anode outlet (4) and cathode outlet 5, which are reinforced and covered with non-combustible material. any of the above requests characterized by its end (5) pouch type lithium-ion battery cell (1).

6. With the onset of thermal escape, gas pressure and mechanical stress... The neck region, where the gas concentration is highest and which is the starting point of the gas release channel, is 10. a purse like any of the above-mentioned claims characterized by (6) type lithium-ion battery cell (1).

7. Gas starting in the neck region and extending to the smart tear line (9) 15 in any of the above requests characterized by a drainage channel such as a pouch type lithium-ion battery cell (1).

8. Thermally insulated composite materials or mechanically opened micro-structures. the above is characterized by a gas release channel with relief valves. a pouch-type lithium-ion battery cell as in any of the requirements (1). 20 9. Containing anode, cathode, and separator electrodes in a spiral or stacked arrangement. Any of the above requirements characterized by an electrode block (7) a pouch type lithium-ion battery cell like one (1).

10. The collector located between the electrode block (7) and the neck region (6). The above is characterized by a transition zone (10) through which the foils pass. a pouch-type lithium-ion battery cell as in any of the requirements (1). 9 11. Insulated passage to prevent electrical short circuits during gas evacuation. a pouch-type lithium-ion as in Claim 10 characterized by region (10) battery cell (1).

12. It is a dielectric tape that prevents short circuits in the neck region (6). any of the above claims characterized by insulation tape (8) such as a pouch type lithium-ion battery cell (1).

13. Weakened lines located in the shell of the cell vessel (2) and thermal escape Smart rupture 10, which allows gas to escape by tearing due to the pressure created during the process. as in any of the above claims characterized by lines (9) a pouch type lithium-ion battery cell (1).

14. Increase in pressure during thermal escape in the cell container (2) of the cell Smart 15 containing microstructures that initiate tearing in the section determined in the container (2). any of the above claims characterized by tear lines (9) a pouch type lithium-ion battery cell like one (1).

15. Formed in the electrode block (5) immediately below, in the neck region (6) a channel that allows the discharge of the directed gas and the end of the discharge channel is located at 20 It is characterized by a smart rupture line (9) which has a gas release outlet. a pouch-type lithium-ion as in any of the above requests battery cell (1).

16. Created by laser microstructure etching technology on cell vessel (2) 25 any of the above claims characterized by smart tear lines (9) a pouch type lithium-ion battery cell like one (1).

Images