【TECHNICAL FIELD】
Cross Citation with Related Application(s)
This application claims the benefit of Korean Patent Application No. 10-2020-0168895
filed on December 4, 2020 and Korean Patent Application No. 10-2021-0150562 filed on
November 4, 2021 with the Korean Intellectual Property Office, the disclosure of which is
10 incorporated herein by reference in its entirety.
The present disclosure relates to a battery module and a battery pack including the same,
and more particularly, to a battery module having an enhanced safety, and a battery pack including
the same.
15 【BACKGROUND ART】
With the increase of the technological development and demand for a mobile device,
demand for a secondary battery as an energy source is rapidly increasing, and accordingly, many
researches of the battery capable of meeting a variety of needs are emerging.
A secondary battery has attracted considerable attention as an energy source for power20 driven devices, such as an electric bicycle, an electric vehicle, and a hybrid electric vehicle, as well
as an energy source for mobile devices, such as a mobile phone, a digital camera, and a laptop
computer.
Recently, along with a continuous rise of the necessity for a large-capacity secondary
battery structure, including the utilization of the secondary battery as an energy storage source,
25 there is a growing demand for a battery pack of a multi-module structure which is an assembly of
battery modules in which a plurality of secondary batteries are connected in series/parallel.
Meanwhile, when a plurality of battery cells are connected in series/parallel to configure a
battery pack, a method of configuring a battery module composed of at least one battery cell and
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then adding other components to at least one battery module to configure a battery pack is common.
Since the battery cells constituting these middle or large-sized battery modules are composed of
chargeable/dischargeable secondary batteries, such a high-output and large-capacity secondary
battery generates a large amount of heat in a charging and discharging process.
5 The battery module may include a battery cell stack in which a plurality of battery cells are
stacked, a frame for housing the battery cell stack, and end plates for covering the front and rear
surfaces of the battery cell stack.
Fig. 1 is a view showing the appearance of a battery module mounted on a conventional
battery pack at the time of ignition. Fig. 2 is a section taken the line A-A of Fig. 1, which is a
10 cross-sectional view showing the appearance of a flame that affects adjacent battery modules
during ignition of a battery module mounted on a conventional battery pack.
Referring to Figs. 1 and 2, the conventional battery module includes a battery cell stack in
which a plurality of battery cells 10 are stacked, a frame 20 for housing the battery cell stack, end
plates 30 formed on the front and rear surfaces of the battery cell stack, terminal busbars 40 formed
15 so as to protrude to the outside of the end plates 30, and the like.
The frame 20 and the end plate 30 can be combined so as to be sealed by welding. When the
frame 20 for housing the battery cell stack and the end plate 30 are combined in this way, the
internal pressure of the battery cells 10 increases during overcharge of the battery module to exceed
a limit value of the fusion strength of the battery cell. In this case, high-temperature heat, gas, and
20 flame generated in the battery cells 10 can be discharged to the outside of the battery cell 10.
At this time, the high-temperature heat, gas and flame may be discharged through the
openings formed in the end plates 30. However, in a battery pack structure in which a plurality of
battery modules are arranged so that the end plates 30 face each other, the high-temperature heat,
gas and flame ejected from the battery module may affect a battery module. Thereby, the terminal
25 busbar 40 formed on the adjacent end plates 30 of the battery module may be damaged, and hightemperature heat, gas, and flame may enter the inside of the battery module via the openings
formed in the adjacent end plates 30 of the battery module to damage the plurality of battery cells
10.
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【DETAILED DESCRIPTION OF THE INVENTION】
【Technical Problem】
It is an object of the present disclosure to provide a battery module having an enhanced
5 safety by suppressing high-temperature heat and flame discharged when an ignition phenomenon
occurs inside the battery module, and a battery pack including the same.
However, the technical problem to be solved by embodiments of the present disclosure is
not limited to the above-described problems, and can be variously expanded within the scope of
the technical idea included in the present disclosure.

【CLAIMS】
【Claim 1】
A battery module comprising:
a battery cell stack in which a plurality of battery cells are stacked, and
5 a module frame for housing the battery cell stack,
wherein a venting part is formed on one side plate of the module frame,
wherein the venting part comprises an inflow port and a discharge port for discharging gas
flowing in through the inflow port, and
wherein the inflow port and the discharge port of the venting part are arranged spaced apart
10 from each other in the longitudinal direction of the one side plate.
【Claim 2】
The battery module of claim 1, wherein:
the battery module comprises a first fire extinguishing material layer located between one side
plate of the module frame and the battery cell stack, and
15 the first fire extinguishing material layer includes a fire extinguishing agent.
【Claim 3】
The battery module of claim 1, wherein:
a second fire extinguishing material layer containing a fire extinguishing agent is formed in
the venting part.
20 【Claim 4】
The battery module of claim 1, wherein:
a first fire extinguishing material layer containing a fire extinguishing agent is formed between
one side plate of the module frame and the battery cell stack,
a second fire extinguishing material layer containing a fire extinguishing agent is formed in
25 the venting part, and
the fire extinguishing agent contained in the first fire extinguishing material layer and the
second fire extinguishing material layer comprises potassium hydrogen carbonate, and at least one
of the first fire extinguishing material layer and the second fire extinguishing material layer causes
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a thermal decomposition reaction during occurrence of a fire.
【Claim 5】
The battery module of claim 4, wherein:
the first fire extinguishing material layer and the second fire extinguishing material layer are
5 connected to each other.
【Claim 6】
The battery module of claim 1, wherein:
the venting part has a hole structure, and the hole structure has an inclined structure.
【Claim 7】
10 The battery module of claim 1, wherein:
the venting part has a hole structure formed in an upper side plate of the module frame, and
the hole structure obliquely penetrates the upper side plate.
【Claim 8】
The battery module of claim 1, wherein:
15 the venting part comprises
an inflow port that is formed on the upper side plate of the module frame and faces the battery
cell stack, and
a discharge port that discharges gas flowed in through the inflow port,
wherein the discharge port is formed in a direction perpendicular to the inflow port.
20 【Claim 9】
The battery module of claim 8, wherein:
the venting part comprises
a connection part that is formed between the inflow port and the discharge port and guides gas
flowing into the inflow port in a direction in which the discharge port is located, and
25 the upper surface of the connection part is formed obliquely.