Power bank with built-in fire extinguishing tank

Abstract

The present invention relates to a battery pack applied to a power bank, and more specifically, to a power bank or battery pack capable of initial fire suppression in the event of battery thermal runaway or fire by incorporating a fire extinguishing tank filled with a fire extinguishing agent.

Description

Technology Field

[0001] The present invention relates to a battery pack applicable to an auxiliary battery or an external battery, and in particular to a battery pack having a built-in fire extinguishing tank and a fire extinguishing function in the event of thermal runaway of the battery. Background Technology

[0002] A battery cell can be a single battery, such as a cylindrical battery, a prismatic battery, or a pouch battery.

[0003] A battery module may be configured with multiple single cells arranged in series and parallel.

[0004] A battery pack can be configured by combining multiple battery modules in series or parallel.

[0005] A high-capacity power bank is generally configured by placing a single battery pack like the one above or by combining multiple battery packs.

[0006] Such power banks are highly vulnerable to fires caused by high temperatures and heat generation. Furthermore, because the battery cells are installed in a dense manner, a fire in just one battery can cause a chain reaction that spreads to adjacent batteries, making fire suppression extremely difficult.

[0007] Fires in battery packs can also occur due to electrical short circuits caused by static electricity, sparks, and corrosion of wire insulation. Prior art literature

[0008] KR 1027671350000KR 102757994 The problem to be solved

[0009] The present invention has been devised to solve the aforementioned problem, and its purpose is to provide a battery module or battery pack having a structure capable of urgently introducing a fire extinguishing agent from outside the battery module or battery pack. means of solving the problem

[0010] To achieve the aforementioned objective, the power bank with a built-in fire extinguishing tank according to the present invention may include a battery module comprising a plurality of battery cells arranged in series and parallel, a battery pack composed of said battery module, a fire extinguishing tank filled with a fire extinguishing agent, a valve or duct structure connecting the battery pack and the fire extinguishing tank, and a plug sealing said structure.

[0011] In addition, in the power bank with a built-in fire extinguishing tank of the present invention, the battery pack may include a structure in which a plurality of the battery modules are connected in series and parallel.

[0012] In addition, in the power bank with a built-in fire extinguishing tank of the present invention, the battery pack may include a structure in which the battery module is composed solely of one.

[0013] In addition, in the power bank with a built-in fire extinguishing tank of the present invention, the battery module may include a structure in which the battery cell is composed solely of one.

[0014] In addition, in the power bank with a built-in fire extinguishing tank according to the present invention, the valve or duct structure may include a structure that is not directly connected to the battery pack or the fire extinguishing tank.

[0015] In addition, the power bank with a built-in fire extinguishing tank according to the present invention may include a structure in which the battery pack and the fire extinguishing tank are directly connected without the valve or duct structure.

[0016] In addition, in the power bank with a built-in fire extinguishing tank of the present invention, the plug may be made of a material that is easily ruptured by pressure or easily destroyed by heat compared to the fire extinguishing tank. Effects of the invention

[0017] The power bank with a built-in fire extinguishing tank according to the present invention has the following effects.

[0018] In the event of battery thermal runaway or fire, the fire extinguishing agent filled in the fire extinguishing tank may flow into the battery pack and submerge the battery cells.

[0019] Unlike conventional control-based fire suppression systems, it operates by physical pressure or heat, which can increase the operational reliability of the device in the event of battery thermal runaway or fire.

[0020] With a fire extinguishing tank built into the power bank or battery pack, unlike conventional battery fire spread prevention systems, a separate external device is not required.

[0021] The fire extinguishing device is structured to operate inside a power bank or battery pack, and the fire extinguishing device of the present invention is not hindered by the shape or structure of the power bank or battery pack enclosure. Brief explanation of the drawing

[0022] FIG. 1 is a perspective view of a battery pack (100) combined with a fire extinguishing tank inside a power bank according to a preferred first variant of the present invention. FIGS. 2 and FIGS. 3 are perspective views showing a battery pack with the outer case removed from the battery pack (100) of FIG. 1. FIG. 4 is an enlarged plan view for representing the groove structure for injecting fire extinguishing agent. FIG. 5 is a top view of a battery pack combined with a fire extinguishing tank. FIG. 6 is a bottom view of a battery pack combined with a fire extinguishing tank. Specific details for implementing the invention

[0023] The embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components, regardless of drawing symbols, will be assigned the same reference number, and redundant descriptions thereof will be omitted. The suffixes "module," "pack," and "part" used for components in the following description are assigned or used interchangeably solely for the ease of drafting the specification and do not inherently possess distinct meanings or roles. Furthermore, when describing the embodiments disclosed in this specification, if it is determined that a detailed description of related prior art could obscure the essence of the embodiments disclosed in this specification, such detailed description will be omitted. Additionally, the attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification; the technical concept disclosed in this specification is not limited by the attached drawings and should be understood to include all modifications, equivalents, and substitutions that fall within the spirit and technical scope of the invention.

[0024] Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0025] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0026] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0027] In this application, terms such as “comprising” or “having” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0028] In the drawings, the sizes of the components may be exaggerated or reduced for convenience of explanation. For example, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, so the present invention is not necessarily limited to what is illustrated.

[0029] Where an embodiment can be implemented differently, a specific process sequence may be performed differently from the order described. For example, two processes described consecutively may be performed substantially simultaneously or proceed in the reverse order of the description.

[0030] FIG. 1 is a perspective view of a battery pack (100) combined with a fire extinguishing tank inside a power bank according to a preferred first variant of the present invention, and FIG. 2 and FIG. 3 are perspective views in which the outer case (110, 111) of the battery pack (100) is omitted for easy verification of the internal structure.

[0031] Referring to FIG. 1 and FIG. 2, the fire extinguishing tank (101) according to the present embodiment is coupled to a battery pack (100) and injects a fire extinguishing agent through a duct structure.

[0032] Referring to FIG. 3, the duct structure of the fire extinguishing tank (101) according to the present embodiment is blocked by a plug (102) so that the outflow of the fire extinguishing agent is suppressed under normal circumstances.

[0033] The stopper (102) of Fig. 3 may include a bulb structure that can be ruptured by pressure, or a structure that can be destroyed by heat including rubber, silicone, etc.

[0034] Additionally, the plug (102) of Fig. 3 may be a valve structure that is opened by a signal or by pressure.

[0035] In the event of a battery thermal runaway or fire, the cap (102) of the fire extinguishing tank (101) ruptures, breaks, or opens to fill the battery pack (100) with a fire extinguishing agent, thereby extinguishing the battery fire in its early stages.

[0036] At this time, the battery pack (100) has a fire extinguishing agent injection groove (113a) of FIG. 4 inside, so the time for the fire extinguishing agent to be filled into the battery pack can be shortened.

[0037] In addition, the battery pack (100) can prevent the extinguishing agent introduced by the battery pack case (110) and battery cover (120) from leaking out to the outside.

[0038] Some or other embodiments of the present invention described above are not exclusive or distinct from one another. Some or other embodiments of the present invention described above may be used in combination or combined, with their respective components or functions.

[0039] It is obvious to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential features of the invention. The foregoing detailed description should not be interpreted restrictively in any respect and should be considered exemplary. The scope of the invention shall be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the invention are included within the scope of the invention. Explanation of the symbols

[0040] 100: Conceptual diagram of a battery pack with a fire extinguishing tank installed 101: Fire extinguishing tank 102: Stopper 110: Battery pack case 111: Battery pack cover 112: Battery front / rear frame 113: Battery upper frame 113a: Fire extinguishing agent injection groove 114: Battery lower frame 120: Battery cell terminal busbar 121: Battery cell busbar

Claims

Claim 1 A battery module comprising multiple rows and columns of battery cells directly connected in series and parallel to upper and lower buses, and a battery pack composed of said module. Claim 2 A fire extinguishing tank installed near a battery pack, having a valve or duct structure capable of rapidly injecting fire extinguishing agent into the battery pack, and including a plug to prevent leakage of the fire extinguishing agent under normal circumstances. Claim 3 A fire extinguishing tank according to claim 2, which is integrated with a battery pack and can inject a fire extinguishing agent into the battery pack without a valve or duct structure. Claim 4 A battery pack comprising a battery frame having a fire extinguishing agent inlet or an inlet assisting groove for rapid injection of a fire extinguishing agent. Claim 5 A battery pack according to claim 1, wherein the battery cell comprises any one of a cylindrical battery, a prismatic battery, and a pouch-type battery, having a mesh-shaped bus bar connection structure.

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