Gas discharge system

Abstract

The present invention relates to a system (1) which enables the gas formed in the module located in the electric vehicle battery packs to be discharged without spreading into the pack.

Description

[0001] DESCRIPTION

[0002] GAS DISCHARGE SYSTEM

[0003] Technical Field

[0004] The present invention relates to a system which enables the gas formed in the module located in the electric vehicle battery packs to be discharged without spreading into the pack.

[0005] Background of the Invention

[0006] Thermal dissipation in electric vehicle battery packs is a condition that occurs as a result of a rapid increase in the temperature in the battery, and uncontrolled continuation of this situation can lead to serious problems. Precautions should be taken for this problem and controlled gas discharge should be performed. Because thermal dissipation can cause the formation of gases as a result of high temperatures and energy losses. The accumulation of these gases can lead to increased pressure inside the battery and potentially explosions. In addition, overheating of the battery cells reduces battery performance and shortens its life. The accumulation of gases inside the module increases the risk of fire and can cause corrosion of metal parts.

[0007] For this reason, in order to overcome the above-mentioned deficiencies, there is a need for a new system which enables the gas formed in the modules in the battery packs to be discharged without spreading into the pack.

[0008] The Chinese patent document no. CN102931432, an application included in the state of the art, discloses a self-balancing lithium-ion battery. The invention subject to the said Chinese patent document describes a self-balancing lithium-ion battery. The lithium-ion battery comprises a lithium iron phosphate anode, a cathode, a membrane, electrolyte and a shell; the shell comprises a cover plate assembly and a shell body. With the adoption of the battery structure provided by the invention, the consistency, the reliability and the environment adaptability can be effectively improved, and the circular service life of the lithium-ion battery is effectively prolonged, and the large-current balance can be realized. The difficult problem of small balance current and poor reliability of the conventional protection board can be solved, and the self-balancing lithium-ion battery, especially the large-capacity lithium-ion battery, can be used in fields such as energy storage, rail traffic and electric cars.

[0009] Summary of the Invention

[0010] An object of the present invention is to realize a system which enables the gas formed in the module located in the electric vehicle battery packs to be discharged without spreading into the pack.

[0011] Another object of the present invention is to realize a system which enables the internal pressure to be kept under control and possible explosions to be prevented by discharging the gas formed inside the module in battery packs.

[0012] A further object of the present invention is to realize a system which reduces the possibility of fire due to gas accumulation inside the battery pack.

[0013] A further object of the present invention is to realize a system which enables metal corrosion caused by gas accumulation inside the battery pack to be eliminated.

[0014] Detailed Description of the Invention

[0015] “Gas Discharge System” realized to fulfil the objectives of the present invention is shown in the figure attached, in which: Figure l is a general view of the inventive system.

[0016] The components illustrated in the figure are individually numbered, where the numbers refer to the following:

[0017] 1. System

[0018] 2. Battery frame

[0019] 3. Module

[0020] 4. Battery cell

[0021] 5. First cover

[0022] 6. Second cover

[0023] 7. Flange

[0024] 8. Sealing element

[0025] 9. Valve

[0026] The inventive system (1) which enables the gas formed in the module located in the electric vehicle battery packs to be discharged out of the pack without spreading into the pack comprises at least one battery frame (2) which forms the skeletal structure of the electric vehicle battery pack and is in the form of a box having multiple compartments therein; at least one module (3) which is placed in the compartments in the battery frame (2) and has a ‘U’ shape; at least one battery cell (4) which is placed inside the module (3); at least one first cover (5) which is a plate-shaped structure covering the battery cell (4) and is configured to have at least one circular opening; at least one second cover (6) which is a plate-shaped structure having at least one circular opening and is positioned on the first cover (5) such that there is a gap between it and the first cover (5); at least one flange (7) which is located in the gap between the first cover

[0027] (5) and the second cover (6); is in contact with the first cover (5) and the second cover (6); is placed in such a way that to be aligned with the circular openings of the first cover (5) and the second cover (6) and has a cylindrical structure with a diameter not smaller than the diameter of these openings; at least one sealing element (8) which is located on the surfaces of the flange (7) that are in contact with the first cover (5) and the second cover

[0028] (6) and is used to provide a seal during the discharge of the gas formed in the battery cell (4) through the circular openings in the first cover (5) and the second cover (6) by preventing it from spreading into the battery pack; and at least one valve (9) which is positioned so as to be located on the second cover (6) after the circular openings of the first cover (5), the second cover (6) and the flange (7) are aligned on top of each other and is configured to enable the gas in the battery cell (4) to be discharged.

[0029] The first cover (5) included in the inventive system (1) is configured to enable the module (3) in the form of an open-top box to be covered in a sealed manner. The first cover (5) is used to prevent the gas released by the battery cell (4) in the module (3) from leaking into the battery pack, and to direct the gas through the opening it has towards the valve (9) during the discharge of the gas out of the battery pack. A flange (7) is placed on the opening of the first cover (5) so that it is aligned with the opening.

[0030] The second cover (6) included in the inventive system (1) is configured to be aligned with the flange (7) from the lower part of the opening in the plate-shaped structure thereof, and with the valve (9) from the upper part thereof. The second cover (6) enables the gas discharged from the battery cell (4) to be transmitted to the valve (9) after passing through the opening of the first cover (6) and the flange (7) and is aligned with the first cover (5) opening, the flange (7) and the valve (9). The second cover (6) is configured to close the battery pack at the top.

[0031] The valve (9) included in the inventive system (1) is a gas pressure-sensitive valve for detecting the pressure generated by the gas when gas is formed in the battery cell (4) due to thermal dissipation or for any other reason. The valve (9) is configured to perform an opening / closing movement when it detects that there is gas pressure in the battery cell (4) in order to enable the gas to be discharged from the battery cell (4) out of the battery pack. The valve (9) is placed on the first cover (5), the flange (7) and the second cover (6), placed such that their circular openings overlap, so as to close the openings of them.

[0032] Industrial Application of the Invention

[0033] By means of the inventive system (1), it is enabled to discharge the gas formed as a result of thermal dissipation in the electric vehicle battery in a regular and safe manner, thus ensuring the safety, performance and longevity of the battery. The gas formed in the battery cell generates a gas pressure. The gas pressure passes through the first cover (5) opening, the flange (7) and the second cover (6) opening respectively and reaches the valve (9). Since the valve (9) is sensitive to the gas pressure, it senses the pressure and enables the gas in the battery cell (4) to be discharged out of the pack without leaking into the battery pack.

[0034] Within these basic concepts; it is possible to develop various embodiments of the inventive “Gas Discharge System (1)”; the invention cannot be limited to examples disclosed herein and it is essentially according to claims.

Claims

CLAIMS1. A system (1) which enables the gas formed in the module located in the electric vehicle battery packs to be discharged out of the pack without spreading into the pack; comprising at least one battery frame (2) which forms the skeletal structure of the electric vehicle battery pack and is in the form of a box having multiple compartments therein; at least one module (3) which is placed in the compartments in the battery frame (2) and has a ‘U’ shape; at least one battery cell (4) which is placed inside the module (3); and characterized by at least one first cover (5) which is a plate-shaped structure covering the battery cell (4) and is configured to have at least one circular opening; at least one second cover (6) which is a plate-shaped structure having at least one circular opening and is positioned on the first cover (5) such that there is a gap between it and the first cover (5); at least one flange (7) which is located in the gap between the first cover(5) and the second cover (6); is in contact with the first cover (5) and the second cover (6); is placed in such a way that to be aligned with the circular openings of the first cover (5) and the second cover (6) and has a cylindrical structure with a diameter not smaller than the diameter of these openings; at least one sealing element (8) which is located on the surfaces of the flange (7) that are in contact with the first cover (5) and the second cover(6) and is used to provide a seal during the discharge of the gas formed in the battery cell (4) through the circular openings in the first cover (5) and the second cover (6) by preventing it from spreading into the battery pack; and at least one valve (9) which is positioned so as to be located on the second cover (6) after the circular openings of the first cover (5), the second cover(6) and the flange (7) are aligned on top of each other and is configured to enable the gas in the battery cell (4) to be discharged.

2. A system (1) according to Claim 1; characterized by the first cover (5) which is configured to enable the module (3) in the form of an open-top box to be covered in a sealed manner.

3. A system (1) according to Claim 1 or 2; characterized by the first cover (5) which is used to prevent the gas released by the battery cell (4) in the module (3) from leaking into the battery pack, and to direct the gas through the opening it has towards the valve (9) during the discharge of the gas out of the battery pack.

4. A system (1) according to any one of the preceding claims; characterized by the first cover (5), on the opening of which the flange (7) is placed so that it is aligned with the opening.

5. A system (1) according to any one of the preceding claims; characterized by the second cover (6) which is configured to be aligned with the flange (7) from the lower part of the opening in the plate-shaped structure thereof, and with the valve (9) from the upper part thereof6. A system (1) according to any one of the preceding claims; characterized by the second cover (6) which enables the gas discharged from the battery cell (4) to be transmitted to the valve (9) after passing through the opening of the first cover (6) and the flange (7) and is aligned with the first cover (5) opening, the flange (7) and the valve (9).

7. A system (1) according to any one of the preceding claims; characterized by the second cover (6) which is configured to close the battery pack at the top.

8. A system (1) according to any one of the preceding claims; characterized by the valve (9) which is a gas pressure-sensitive valve for detecting the pressure generated by the gas when gas is formed in the battery cell (4) due to thermal dissipation or for any other reason.

9. A system (1) according to any one of the preceding claims; characterized by the valve (9) which is configured to perform an opening / closing movement when it detects that there is gas pressure in the battery cell (4) in order to enable the gas to be discharged from the battery cell (4) out of the battery pack.

10. A system (1) according to any one of the preceding claims; characterized by the valve (9) which is placed on the first cover (5), the flange (7) and the second cover (6), placed such that their circular openings overlap, so as to close the openings of them.

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