TECHNICAL FIELD
The present application claims priority to Korean Patent Application No. 10-2020-
0137094 filed on October 21, 2020 in the Republic of Korea, the disclosures of which are
incorporated herein by reference.
The present disclosure relates to a battery pack, an electronic device, and a vehicle,
10 and more particularly, to a battery pack for securing easy installation of sensing wires and
reducing manufacturing cost.
BACKGROUND ART
Recently, with the rapid increase in demand for portable electronic products such
15 as laptop computers, video cameras, and mobile phones and the extensive development of
electric vehicles, accumulators for energy storage, robots and satellites, many studies are
being made on high performance secondary batteries that can be repeatedly recharged.
Currently, commercially available secondary batteries include nickel-cadmium
batteries, nickel-hydrogen batteries, nickel-zinc batteries, lithium secondary batteries and
20 the like, and among them, lithium secondary batteries have little or no memory effect, and
thus they are gaining more attention than nickel-based secondary batteries for their
advantages that recharging can be done whenever it is convenient, the self-discharge rate is
very low and the energy density is high.
3
These lithium secondary battery mainly uses lithium-based oxide and carbon
material as a positive electrode active material and a negative electrode active material,
respectively. In addition, this lithium secondary battery includes an electrode assembly in
which a positive electrode plate and a negative electrode plate respectively coated with the
5 positive electrode active material and the negative electrode active material are disposed
with a separator interposed therebetween, and an exterior, namely a battery case, for
hermetically accommodating the electrode assembly together with an electrolyte.
In addition, depending on the shape of the exterior, lithium secondary batteries
may be classified into a can-type battery cell in which the electrode assembly is included in
10 a metal can and a pouch-type battery cell in which the electrode assembly is included in a
pouch made of an aluminum laminate sheet.
Here, in case of the can-type battery cell, the metal can in which the electrode
assembly is included may be made in a cylindrical shape. The can-type battery cell may
be used to construct a battery pack. For example, the battery pack may include a plurality
15 of can-type battery cells, a cell frame for accommodating the battery cells, and a bus bar or
a metal plate configured to electrically connect the plurality of battery cells.
Meanwhile, the battery pack of the prior art basically measures the current and
temperature changes according to the charging and discharging of a plurality of battery
cells in order to determine the battery operating state or battery life. The battery pack of
20 the prior art uses a current sensing wire to measure the current of a plurality of battery cells,
and a temperature sensing wire to measure the temperature. At this time, in the battery
pack of the prior art, the current sensing wire and the temperature sensing wire are fixed to
the outer surface of the cell frame by using a double-sided tape.
4
However, in the prior art, if the double-sided tape is used to prevent the movement
of the sensing wires, first, the double-sided tape should be installed to surround the sensing
wires, and then a release paper should be removed from the double-sided tape for adhesion
with the cell frame. In this way, the work for fixing the sensing wires by using double5 sided tape is cumbersome, thereby increasing the processing time and increasing the
manufacturing cost.
DISCLOSURE
Technical Problem
10 The present disclosure is designed to solve the problems of the related art, and
therefore the present disclosure is directed to providing a battery pack for securing easy
installation of sensing wires and reducing manufacturing cost.
These and other objects and advantages of the present disclosure may be
understood from the following detailed description and will become more fully apparent
15 from the exemplary embodiments of the present disclosure. Also, it will be easily
understood that the objects and advantages of the present disclosure may be realized by the
means shown in the appended claims and combinations thereof.
Technical Solution
20 In one aspect of the present disclosure, there is provided a battery pack,
comprising:
a plurality of battery cells;
a measuring unit configured to measure a current and temperature of at least one of
5
the plurality of battery cells;
at least one sensing wire electrically connected to the measuring unit and
configured to have a wire on which a current flows; and
a cell frame including a sidewall portion configured to form an inner space for
5 accommodating the plurality of battery cells, and a fixing portion having a pillar part
configured to protrude outward from the sidewall portion and a bending part bent and
extended from the protruding end of the pillar part to form a space for accommodating the
at least one sensing wire.
Also, the fixing portion may include:
10 a first fixing portion having a first pillar part located at one side with respect to the
sensing wire and configured to protrude outward from the sidewall portion, and a first
bending part bent and extended from the protruding end of the first pillar part to surround
the sensing wire; and
a second fixing portion having a second pillar part located at the other side with
15 respect to the sensing wire and configured to protrude outward from the sidewall portion,
and a second bending part bent and extended from the protruding end of the second pillar
part and located to face the first bending part to be spaced apart from the first bending part
by a predetermined distance.
Moreover, the second pillar part may be spaced apart from an end of the first
20 bending part by a predetermined distance.
In addition, the first bending part may further include a pressing protrusion on one
surface thereof facing the sensing wire.
Further, the sidewall portion may further include a fixing protrusion configured to
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protrude toward the sensing wire.
Also, the battery pack may further comprise a guide portion configured to protrude
toward the sensing wire from the second pillar part of the second fixing portion and have
an inclined surface so that a length of the guide portion protruding from the sidewall
5 portion gradually decreases as being closer to the sensing wire.
Moreover, at least one of the first pillar part and the second pillar part may include
a reinforcing rib configured to extend to the sidewall portion.
In addition, the fixing portion may include a hook configured to extend from an
end of the bending part to surround one side portion of the sensing wire.
10 Further, in another aspect of the present disclosure, there is also provided an
electronic device, comprising at least one battery pack.
Also, in another aspect of the present disclosure, there is also provided a vehicle,
comprising at least one battery pack.