KR-20260063011-A - REUSABLE BATTERY PACK VENTING DEVICE

Abstract

A reusable thermal runaway battery exhaust device is disclosed. A reusable thermal runaway battery exhaust device according to one embodiment of the present invention may include a main body installed in an internal-external connection section of a battery and comprising a first hinge equipped with an elastic member and an exhaust port for discharging gas generated inside the battery, and a cover coupled to the main body through the first hinge, wherein if the internal pressure of the battery is greater than or equal to a preset value, an internal plate expands so that the fastening part is released from the main body and opens, and if it is less than the preset value, it closes again by the elastic force of the first hinge while simultaneously contracting the plate to its original state so that the fastening part is connected to the main body.

Inventors

• 윤양원

Assignees

• 윤양원

Dates

Publication Date

20260507

Application Date

20241030

Claims (5)

1. A main body installed in an internal-external connection section of a battery and comprising a first hinge equipped with an elastic member and an outlet for discharging gas generated inside the battery; and A reusable thermal runaway battery exhaust device comprising: a cover that is coupled to the main body through the first hinge, wherein if the internal pressure of the battery is greater than or equal to a preset value, the internal plate expands to release the fastening portion from the main body and open, and if it is less than the preset value, it closes again by the elastic force of the first hinge while simultaneously the plate contracts to its original state so that the fastening portion is connected to the main body.
2. In paragraph 1, The above main body is, A reusable thermal runaway battery exhaust device further comprising a sealing member for sealing the interior of the battery around the discharge port.
3. In paragraph 1, The above cover is, A second hinge that operates according to the expansion or contraction of the above plate; It further includes a crank having one end connected to the second hinge and the other end provided with a sliding groove, and The above fastening part is, A reusable thermal runaway battery exhaust device in which a set of moving pins is coupled to the sliding groove, rotates around a first fixed pin in the central part according to the movement of the crank, and a hook is engaged or disengaged from a locking part of the main body.
4. In paragraph 3, The above crank is, A first shaft with one end connected to the second hinge; and First, it includes a second shaft that is coupled to the other end of the first shaft with a second fixing pin and has the sliding groove at the other end. A reusable thermal runaway battery exhaust device that rotates around the second fixing pin fixedly coupled to the cover according to the operation of the second hinge and rotates the fastening part.
5. In paragraph 1, The above plate is, Reusable thermal runaway battery exhaust device, which is an elastic metal sheet.

Description

Reusable Battery Pack Venting Device The present invention relates to a reusable thermal runaway battery exhaust device. Recently, as the demand for portable electronic products such as laptops and mobile phones has increased, and robots and electric vehicles have become commercialized and widely utilized, the demand for batteries is increasing explosively. Batteries can experience a rapid rise in internal temperature and generate flames due to various causes, including external forces. Although the exact cause is unknown, battery-related fire accidents have been occurring frequently in electric vehicles that use batteries as a power source recently. Since fires originating in batteries are very difficult to extinguish and can easily spread to adjacent battery modules, it is desirable to devise methods to prevent battery fires in advance. In particular, if high temperature, high pressure gas, and flames are generated inside the battery, they must be able to be quickly vented to the outside. Conventional battery exhaust devices used disposable parts such as rupture discs and film members, so after one operation, the battery exhaust device itself had to be replaced, or in severe cases, the entire battery pack or battery rack had to be replaced. As an example of the technology forming the background of the present invention, Korean Registered Patent Publication No. 10-2330377 (November 18, 2021) discloses battery cells capable of discharging high-temperature gas and flames, etc. to the outside when a high-temperature situation occurs due to abnormal heat generation in a battery module; a module case that accommodates the battery cells and has internal cooling channels formed on both sides of the battery cells; at least one opening provided on both sides of the module case facing the internal cooling channels of the module case; a battery module comprising a pair of film members mounted on both sides of the module case to cover at least one opening and opening the at least one opening while melting at a temperature above a predetermined temperature; and a battery rack comprising such a battery module. FIG. 1 is an enlarged view of a reusable thermal runaway battery exhaust device and some configurations according to one embodiment of the present invention. FIG. 2 shows the expanded plate of a reusable thermal runaway battery exhaust device according to one embodiment of the present invention. FIG. 3 shows the cover of a reusable thermal runaway battery exhaust device according to one embodiment of the present invention in an open state. FIG. 4 shows a plate that has contracted when the cover of a reusable thermal runaway battery exhaust device according to one embodiment of the present invention is open. FIG. 5 shows the cover of a reusable thermal runaway battery exhaust device according to one embodiment of the present invention closed. The operating principles of preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. Furthermore, in describing embodiments of the invention, detailed descriptions of related known functions or configurations will be omitted if it is determined that such detailed descriptions could obscure the essence of the present disclosure. Additionally, the terms used below are defined considering their functions in the present invention, and these may vary depending on the intentions or conventions of the user or operator. Therefore, the definitions of the terms used should be interpreted based on the content throughout this specification and the corresponding functions. FIG. 1 is an enlarged view of a reusable thermal runaway battery exhaust device and some configurations according to one embodiment of the present invention. Referring to FIG. 1, a reusable thermal runaway battery exhaust device (10) according to one embodiment of the present invention may include a main body (100) and a cover (200). A main body (100) according to one embodiment of the present invention is installed in a duct of a battery and may include a first hinge (110) equipped with an elastic member (111) and an outlet which is a passage for discharging gas generated inside the battery. Here, the elastic member (111) may apply elastic force in the direction in which the first hinge (110) closes the cover (200), and may be, for example, a coil spring. Also, although a battery has been described as an example for convenience of explanation, the battery may include not only individual battery cells but also battery packs, battery racks, etc. Additionally, the main body (100) may include a sealing member for sealing the inside of the battery around the discharge port. Here, the sealing member may be an elastic flexible material such as rubber or silicone. A cover (200) according to one embodiment of the present invention is coupled to a main body (100) through a first hinge (110) and can be opened by high temperature, high pressure gas inside the battery