TECHNICAL FIELD
[0001] The present disclosure relates to a battery pack including a fixing unit
using a magnetic force and a manufacturing method thereof, and a method for
10 placing a battery cell of the battery pack, and more particularly, to a battery pack
including a fixing unit using a magnetic force, which is capable of easily fixing a
plurality of battery cells in a battery pack housing, and a manufacturing method
thereof, and a method for placing a battery cell of the battery pack.
BACKGROUND
15 [0002] A medium and large-sized device such as an electric vehicle requires
a high output and large capacity power source. Thus, the medium and large-sized
device generally uses a medium and large-sized battery pack in which a plurality of
battery cells are electrically connected as a power source.
[0003] The plurality of battery cells may be connected by serial connection,
20 parallel connection, or a mixed method of the serial connection and the parallel
connection and maintain a stable structure against an external impact when
connected, so that the medium and large-sized battery pack satisfies the high output
and the large capacity required by the medium and large-sized device.
[0004] To this end, a typical medium and large-sized battery pack electrically
25 connects and structurally fixes the plurality of battery cells by welding the plurality
3
of battery cells to a busbar assembly. Here, this welding work is extremely
complicated and sophisticated to require much time. Also, once components are
welded, the components are hardly separated from each other. That is, when a
portion of the battery cells are damaged, it is hard to separate and replace only the
5 damaged battery cells. Also, the welding work may cause deformation of the battery
cell according to a welding intensity and easily give an adverse effect on
performance and safety of the battery cell.
[0005] The background technology of the present invention is disclosed in
patent documents below.
10 (Patent document 1) KR10-2008-0027505 A
(Patent document 2) KR10-2009-0011601 A
(Patent document 3) KR10-2018-0129115 A
SUMMARY
15 [0006] The present disclosure provides a battery pack capable of easily fixing
a plurality of battery cells in a battery pack housing by using a magnetic force.
[0007] The present disclosure also provides a method for manufacturing a
battery pack, which is capable of easily fixing a plurality of battery cells in a battery
pack housing by using a magnetic force.
20 [0008] The present disclosure also provides a method for replacing a battery
cell of a battery pack, which is capable of easily replacing a wanted battery cell by
using a magnetic force.
[0009] In accordance with an exemplary embodiment, a battery pack
includes: a battery pack housing; a plurality of battery cells disposed in the battery
25 pack housing; and a fixing unit disposed in the battery pack housing to fix a position
4
of the plurality of battery cells by using a magnetic force.
[0010] The fixing unit may include: a plurality of first members respectively
attached and coupled to top surfaces of the plurality of battery cells by a magnetic
force; and a second member having a size corresponding to that of a bottom surface
5 of a battery pack housing upper cover and attached and coupled to the plurality of
first members by the magnetic force.

WHAT IS CLAIMED IS:
1. A battery pack comprising:
a battery pack housing;
a plurality of battery cells disposed in the battery pack housing; and
5 a fixing unit disposed in the battery pack housing to fix a position of the
plurality of battery cells by using a magnetic force.
2. The battery pack of claim 1, wherein the fixing unit comprises:
a plurality of first members respectively attached and coupled to top surfaces
10 of the plurality of battery cells by a magnetic force; and
a second member having a size corresponding to that of a bottom surface of a
battery pack housing upper cover and attached and coupled to the plurality of first
members by the magnetic force.
15 3. The battery pack of claim 1, wherein the fixing unit comprises:
a plurality of first members respectively attached and coupled to bottom
surfaces of the plurality of battery cells by a magnetic force; and
a second member having a size corresponding to that of a bottom surface of a
battery pack housing lower case and attached and coupled to the plurality of first
20 members by the magnetic force.
4. The battery pack of claim 1, wherein the fixing unit comprises:
a plurality of first members attached and coupled to a top surface and a
bottom surface of each of the plurality of battery cells by a magnetic force; and
25 a plurality of second members respectively disposed above and below the
26
plurality of battery cells and attached and coupled to the plurality of first members by
the magnetic force,
wherein the plurality of second members comprises the second member
disposed above the plurality of battery cells, which has a size corresponding to that
5 of a bottom surface of a battery pack housing upper cover, and the second member
disposed below the plurality of battery cells, which has a size corresponding to that
of a bottom surface of a battery pack housing lower case.