WO2019203441A1

WO2019203441A1 - Battery pack

Info

Publication number: WO2019203441A1
Application number: PCT/KR2019/002759
Authority: WO
Inventors: 박상훈
Original assignee: 삼성에스디아이주식회사
Priority date: 2018-04-16
Filing date: 2019-03-08
Publication date: 2019-10-24
Also published as: KR20190120661A; KR102591513B1; CN111989812A

Abstract

The present invention provides a battery pack provided with: a unit cell which includes a sealing case which receives an electrode assembly, a terrace part extending in a first direction from one side of the sealing case, and a terminal part extending outside the sealing case; a protection circuit module which is positioned on one side of the unit cell so as to be electrically connected to the terminal part and is arranged on a level with the unit cell; an external case which receives the unit cell and the protection circuit module, and includes a first partition wall arranged between the unit cell and the protection circuit module and extending in a second direction perpendicular to the first direction; and a temperature element unit which includes a temperature element, and first and second leads connected to the respective sides of the temperature element, and which is positioned between the unit cell and the first partition wall and supported by the first partition wall.

Description

Battery pack

The present invention relates to a battery pack with improved durability and safety.

Due to the development of wireless Internet and communication technology, the use of portable electronic devices that can operate using batteries without a power supply device is becoming common. Among them, portable computers are small and easy to carry, and have excellent portability, so they are widely used for work or personal use. A portable computer may be provided with a battery pack for use in various locations without regard to the power supply. The battery pack may have a plurality of unit cells that can be repeatedly used for charging and discharging to provide sufficient output.

On the other hand, the lithium secondary battery, which has recently increased rapidly, has a variety of flammable materials, and there is a risk of overheating, explosion, etc. due to overcharge, overcurrent, and other physical external shocks. Therefore, a lithium secondary battery is a safety element that can effectively control abnormal conditions such as overcharge and overcurrent, such as a PTC (Positive Temperature Coefficient) element, a protection circuit module (PCM), and a thermal cut-out (TCO). It is included in the Battery Management Unit (BMU) that controls the operation of this battery pack.

In the provision of such a safety device, as the trend of the battery pack is focused on weight reduction and slimming, the safety device provided in the battery pack also requires a more compact structure.

However, as the battery pack becomes lighter and slimmer, heat conduction convection occurs actively according to the position where the safety device is disposed, which makes it difficult to perform the function of the safety device that needs to measure the temperature of the battery cell.

The present invention has been made to solve various problems including the above problems, and an object of the present invention is to provide a battery pack having a compact structure and improving the function of a safety device. However, these problems are exemplary, and the scope of the present invention is not limited thereby.

According to an embodiment of the present invention, a unit comprising an electrode assembly, a sealing case for receiving the electrode assembly, a terrace portion extending in a first direction on one side of the sealing case and a terminal portion extending outward of the sealing case battery; A protection circuit module positioned on one side of the unit battery so as to be electrically connected to the terminal unit, and disposed horizontally with the unit battery; An outer case accommodating the unit battery and the protection circuit module and including a first partition wall disposed between the unit battery and the protection circuit module and extending in a second direction perpendicular to the first direction; And a temperature element, a first lead and a second lead connected to both sides of the temperature element, and having a temperature element portion positioned between the unit cell and the first partition wall and supported by the first partition wall. Pack is provided.

According to the present exemplary embodiment, the first battery unit may include a first tab part and a second tab part disposed at one side of the unit battery, one end of which is connected to the temperature element part, and the other end of which is connected to the terminal part and the protection circuit module. have.

According to the present embodiment, the unit cell has a main surface parallel to the first plane and a side surface connected to the main plane and parallel to a second plane perpendicular to the first plane, and the temperature element portion is a side surface of the unit battery. It can be arranged parallel to.

According to the present embodiment, the first tab portion and the second tab portion may be bent to contact the side surface of the unit battery and the terrace portion.

According to the present embodiment, the temperature element may be disposed between the first tab portion and the second tab portion.

According to the present exemplary embodiment, the first tab part includes a first connection tab and a first support tab having a portion in contact with a side surface of the unit battery, and the second tab part is in contact with a side surface of the unit battery. It may include a second connection tab and the second support tab of the divided shape.

According to the present embodiment, the first lead may be connected to the first connection tab, and the second lead may be connected to the second connection tab.

According to the present embodiment, the first support tab and the second support tab may have a bent portion protruding in the first direction.

According to the present embodiment, the partition wall may contact the curved portion to support the temperature element portion.

In an embodiment, the outer case may further include a second partition spaced apart from the first partition wall, and the protection circuit module may be located between the first partition wall and the second partition wall.

According to the present embodiment, the height of the first partition wall may be higher than the height of the second partition wall.

According to the present embodiment, the protection circuit module may include a circuit board, and the second partition wall may support the circuit board.

According to the present embodiment, the circuit board may include a terminal groove, and the protection circuit module may be electrically connected to the first tab portion and the second tab portion through the terminal groove.

According to the present exemplary embodiment, the method may further include an adhesive layer interposed between the temperature device portion and the side surface of the unit battery.

According to the present embodiment, the temperature element may be disposed horizontally with the first partition.

According to another aspect of the invention, the unit cell accommodates the electrode assembly therein, having a main surface parallel to the first plane and a side surface connected to the main surface and parallel to the second plane perpendicular to the first plane; A protection circuit module positioned on one side to be electrically connected to the unit battery and disposed in parallel with the main surface; An outer case accommodating the unit cell and the protection circuit module and including a first partition wall disposed between the unit battery and the protection circuit module and disposed parallel to the side surface; And a temperature element unit positioned between the unit cell and the first partition wall and disposed on a side surface of the unit cell.

According to one embodiment of the present invention made as described above, it is possible to implement a battery pack with improved durability and safety. Of course, the scope of the present invention is not limited by these effects.

In addition, the effects of the present invention may be derived from the contents to be described below with reference to the drawings in addition to the above contents.

1 is an exploded perspective view schematically showing a battery pack according to an embodiment of the present invention.

2 is a perspective view schematically showing a battery pack according to an embodiment of the present invention.

3 is a perspective view schematically illustrating a part of a battery pack according to an embodiment of the present invention.

4 is a sectional view schematically showing a part of a battery pack according to another embodiment of the present invention.

5 is a cross-sectional view schematically showing a part of a battery pack according to an embodiment of the present invention.

6 is a plan view schematically illustrating a part of a battery pack according to an embodiment of the present invention.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. Effects and features of the present invention, and methods of achieving them will be apparent with reference to the embodiments described below in detail together with the drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various forms.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or corresponding components will be denoted by the same reference numerals, and redundant description thereof will be omitted. .

In the following embodiments, the terms first, second, etc. are used for the purpose of distinguishing one component from other components rather than a restrictive meaning.

In the following examples, the singular forms "a", "an" and "the" include plural forms unless the context clearly indicates otherwise.

In the following examples, the terms including or having have meant that there is a feature or component described in the specification and does not preclude the possibility of adding one or more other features or components.

In the following embodiments, when a portion of a film, an area, a component, or the like is said to be "on" or "on" another portion, as well as being "on" or "on directly" of another portion, It also includes the case where other film | membrane, area | region, a component, etc. are interposed.

In the following embodiments, the x-axis, y-axis and z-axis are not limited to three axes on the Cartesian coordinate system, but may be interpreted in a broad sense including the same. For example, the x-axis, y-axis, and z-axis may be orthogonal to each other, but may refer to different directions that are not orthogonal to each other.

In the drawings, components may be exaggerated or reduced in size for convenience of description. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, and thus the present invention is not necessarily limited to the illustrated.

1 is an exploded perspective view schematically showing a battery pack according to an embodiment of the present invention, and FIG. 2 is a perspective view schematically showing a battery pack according to an embodiment of the present invention. FIG. 2 corresponds to a structure in which the battery pack of FIG. 1 is assembled.

1 and 2, for receiving at least one unit cell 100, a protection circuit module 200 electrically connected to the unit cell 100, a unit cell 100, and a protection circuit module 200. The external case 300 and the temperature element unit 400 disposed on one side of the unit cell 100 is provided.

The battery pack may include at least one unit cell 100, and as illustrated in FIG. 1, a plurality of unit cells 100 may be provided and continuously disposed along one direction (+ x direction). Each unit cell 100 may include an electrode assembly (not shown), a sealing case 110 accommodating the electrode assembly, and a terminal unit 140. As shown in FIG. 1, the plurality of unit cells 100 may be continuously disposed in one direction (+ x direction), and each unit cell 100 may be connected to each other by

adhesive tapes

106 and 108. .

Although not shown, the electrode assembly may include a first electrode plate, a second electrode plate, and a separator interposed therebetween, to which the electrode active material is coated. The first electrode plate and the second electrode plate have different polarities. The electrode assembly may be manufactured by winding the first electrode plate, the separator, and the second electrode plate sequentially so as to form a jelly-roll. In another embodiment, the electrode assembly may be a stacked electrode assembly in which the first electrode plate, the separator, and the second electrode plate are sequentially stacked.

The sealing case 110 may include a storage space for accommodating the electrode assembly therein. The sealing case 110 may include an opening at one side, and the electrode assembly may be accommodated therein through the opening. The sealed case 110 may be formed of a metal material and may include, for example, a coated aluminum thin film. Specifically, the sealing case 110 is formed to have a laminated structure covered with a synthetic resin such as nylon, polypropylene or polyethylene on the upper and lower surfaces of a metal thin film, and the inner surface is a heat-adhesive resin for sealing. Is made of. Therefore, the sealing case 110 may be sealed by fusion bonding of the heat-adhesive resin coated on the inner surface by heating and pressing. In the present embodiment, the sealing case 110 may accommodate the electrode assembly and the electrolyte, and may be a pouched-case having flexibility. In another embodiment, the sealing case 110 may be rectangular or cylindrical.

The sealing case 110 may have a terrace 112 at one side thereof. The terrace part 112 may be defined as a part having an extra space formed on one surface of the sealed outer peripheral surfaces formed when the electrode assembly is sealed to the sealing case 110 of the laminate sheet. The terrace part 112 may extend in a first direction (+ y direction), and the protection circuit module 200 to be described later may be disposed to overlap the terrace part 112.

The terminal unit 140 may include a first terminal and a second terminal having different polarities from each other. Although not shown, the first terminal and the second terminal may be connected to the electrode assembly, respectively. For example, the first terminal may be connected to the first electrode plate of the electrode assembly and the second terminal may be connected to the second electrode plate of the electrode assembly, in which case the first terminal has a positive electrode and the second terminal has a negative electrode. Can have The first terminal and the second terminal may be electrically connected to the protection circuit module 200.

The protection circuit module 200 may be disposed on one side of the unit cell 100 and may be electrically connected to the unit cell 100. The protection circuit module 200 may be electrically connected to the unit cell 100 to control charge and discharge of the unit cell 100, and may prevent overheating and explosion caused by overcharge, overdischarge, or overcurrent. . The protection circuit module 200 may include an external terminal 240 that electrically connects the battery pack to an external device.

Meanwhile, the unit cell 100 may have a main surface 102 and a side surface 104 connected to the main surface 102 and perpendicular to the main surface 102. In FIG. 1, the main surface 102 is defined as a plane parallel to the first plane (xy plane), and the side surface 104 is a plane parallel to the second plane (xz plane) perpendicular to the first plane (xy plane). It can be defined as. As shown in FIG. 1, the protection circuit module 200 according to the present exemplary embodiment may be disposed in parallel with the unit cell 100. That the protective circuit module 200 is disposed in parallel with the unit cell 100, it can be understood that the protective circuit module 200 is disposed in parallel with the main surface 102 of the unit cell 100. That is, in FIG. 1, the protection circuit module 200 may be disposed in parallel with the first plane (x-y plane).

The protection circuit module 200 may include a circuit board 210, an element unit 220 mounted on the circuit board 210, a connection terminal 230, and an external terminal 240. The circuit board 210 may extend in the longitudinal direction along one side 104 of the unit cell 100. The device unit 220 may be selectively formed of a safety device made of a passive device such as a resistor and a capacitor of the circuit board 210 or an active device such as an electric field transistor, or integrated circuits. The safety element may include, for example, a positive temperature coefficient element, a fuse, a thermal cutoff element, and the like.

Referring to the enlarged view of FIG. 1, the connection terminal 230 of the protection circuit module 200 may be connected to the terminal unit 140 of the unit cell 100, respectively. The connection terminal 230 of the protection circuit module 200 and the terminal unit 140 of the unit cell 100 may be connected by, for example, spot welding. Therefore, in the present embodiment, the circuit board 210 may include a terminal groove 250. The terminal 230 of the unit cell 100 and the connection terminal 230 of the protection circuit module 200 may be welded in the -z direction through the terminal groove 250 of the circuit board 210.

The outer case 300 may accommodate at least one unit cell 100 and a protection circuit module 200 connected to the unit cell 100. The outer case 300 may include an opening OP to expose a part of the unit cell 100 to the outside. Heat generated in the unit cell 100 may be easily released to the outside through the opening OP. One side of the outer case 300 may be provided with a terminal opening 302 so that the external terminal 240 of the protection circuit module 200 is exposed to the outside.

Referring to FIG. 2, a battery unit in which at least one unit cell 100 and a protection circuit module 200 are coupled may be accommodated in the outer case 300. The battery unit accommodated in the outer case 300 may be fixed to the outer case 300 with

adhesive tapes

304, 306, and 308 on the surface thereof so as not to be removed from the outer case 300.

Referring back to FIG. 1, the temperature element unit 400 may be disposed on one side of the unit cell 100. The temperature device unit 400 is a component in which current is cut off when the temperature rises to reach a predetermined value. When the temperature rises due to a malfunction such as a short circuit in any one or more of the plurality of unit cells 100, By releasing the electrical connection of the corresponding unit electronics and the protection circuit module 200 consists of a structure to improve the safety of the battery pack. The temperature device unit 400 may be, for example, a thermal cut-out (TCO) device.

The temperature device unit 400 may be disposed in parallel with the side surface 104 of the unit cell 100, and may be disposed perpendicularly to the protection circuit module 200. As a comparative example, when the temperature element unit 400 is disposed horizontally with the unit cell 100 and the protection circuit module 200, heat generated from the unit cell 100 is hardly transmitted directly to the temperature element unit 400. There is a problem. Therefore, it is important to arrange the temperature device unit 400 as close to the unit cell 100 as possible.

Accordingly, in the battery pack according to the exemplary embodiment of the present invention, the temperature device unit 400 has a structure in which the unit cell 100 is perpendicular to the unit cell 100, thereby suggesting a structure for effectively improving the stability of the battery pack. The temperature device unit 400 may be disposed to be as close as possible to the unit cell 100 so that the temperature device unit 400 may operate at an optimal position.

3 is a perspective view schematically showing a part of a battery pack according to an embodiment of the present invention, and FIG. 4 is an exploded perspective view schematically showing a part of a battery pack according to another embodiment of the present invention. 3 corresponds to part A of FIG. 1.

Referring to FIG. 3, the temperature element unit 400 may be disposed on one side of the unit cell 100. The temperature device part 400 may be disposed between the first tab part 120 and the second tab part 130 located at one side of the unit cell 100, and the first tab part 120 and the second tab part 130 may be disposed on the temperature element part 400. Can be electrically connected.

The temperature element unit 400 includes a temperature element 410, a first lead 420 and a second lead 430 connected to both sides of the temperature element 410. One side of each of the first lead 420 and the second lead 430 may be connected to the temperature device 410, and the other side thereof may be connected to the first tab part 120 and the second tab part 130, respectively. That is, the temperature element 410 may be disposed between the first tab portion 120 and the second tab portion 130.

In this embodiment, the first tab portion 120 and the second tab portion 130 may have a bent shape. The first tab part 120 and the second tab part 130 may be bent and disposed to simultaneously contact the side surface 104 and the terrace part 112 of the unit cell 100. The first tab portion 120 and the second tab portion 130 may be bent in an approximately 'b' shape.

One end portion 122 of the first tab portion 120 has a split shape, and one end portion 122 of the first tab portion 120 may include a first connection tab 120a and a first support tab 120b, respectively. Can be. Similarly, one end portion 132 of the second tab portion 130 has a split shape, and one end portion 132 of the second tab portion 130 respectively connects the second connection tab 130a and the second support tab 130b. It may include. In FIG. 3, the first connection tab 120a and the second connection tab 130a are formed in a flat shape, but the first support tab 120b and the second support tab 130b are in a first direction (+ y direction). Protruding

bent portions

120c and 130c may be included. The first support tab 120b and the second support tab 130b may be supported by the first partition wall 310 (see FIG. 5) of the outer case 300 to be described later.

The first connection tab 120a of the first tab part 120 may be connected to the first lead 420 of the temperature element 410, and the second connection tab 130a of the second tab part 130 may be a temperature element ( It may be connected to the second lead 430 of the 410. The first connection tab 120a and the second connection tab 130a may be formed in a flat shape to be in surface contact with the first lead 420 and the second lead 430. As described above, the first tab portion 120 and the second tab portion 130 are separated from each other by the first connection tab 120a, the first support tab 120b, the second connection tab 130a, and the second support. As the tab 130b is provided, a portion connected to the temperature element portion 400 and a portion supporting the temperature element portion 400 by the first partition wall 310 may be distinguished from each other. Through this structure, it is possible to efficiently support the temperature element portion 400 so as not to be in direct contact with the temperature element portion 400.

The central portion 120e of the first tab portion 120 and the central portion 130e of the second tab portion 130 may be seated on the terrace portion 112 of the unit cell 100. In FIG. 3, one end portion 122 and one end portion 132 of the second tab portion 130 of the first tab portion 120 and the second tab portion 130 are formed in a bent shape, respectively. The center portion 120e of the first tab portion 120 and the center portion 130e of the second tab portion 130 are disposed corresponding to the side surface 104 of the battery 100, and the terrace portion 112 of the unit cell 100 is formed. It is arranged in correspondence with.

The other end portion 124 of the first tab portion 120 and the other end portion 134 of the second tab portion 130 may extend in a first direction (+ y direction). The other end 124 of the first tab 120 and the other end 134 of the second tab 130 may be connected to the protection circuit module 200 as shown in FIG. 5.

Referring to FIG. 4, an adhesive layer 440 may be interposed between the temperature device unit 400 and the unit cell 100. The adhesive layer 440 may be, for example, an adhesive tape. The adhesive layer 440 is interposed between the temperature element portion 400 and the side surface 104 of the unit cell 100, so that the temperature element portion 400 may be more stably fixed to the side surface 104 of the unit cell 100. You can do that.

5 is a cross-sectional view schematically showing a part of a battery pack according to an embodiment of the present invention, and FIG. 6 is a plan view schematically showing a part of a battery pack according to an embodiment of the present invention. FIG. 5 corresponds to a cross section taken along line BB ′ of FIG. 2.

Referring to FIG. 5, a protection circuit module 200 may be disposed at one side of the unit cell 100 to form a battery unit. The battery unit may be inserted into the outer case 300 to be protected from the outside.

The unit cell 100 may include a terrace part 112 at a side at which the sealing case 110 is sealed, and the terminal part 140 may be disposed at the terrace part 112 side. Although not shown, the electrode assembly is accommodated in the sealed case 110, and the terminal unit 140 may be connected to the electrode assembly. One end 140a of the terminal unit 140 may be inserted into the sealing case 110 to be directly connected to the electrode assembly, and the other end 140b of the terminal unit 140 may be electrically connected to the protection circuit module 200. The terminal unit 140 may be formed to be bent to have a predetermined step d between the one end 140a and the other end 140b. As a result, the protection circuit module 200 connected to the other end 140b of the terminal 140 and the terrace 112 of the unit cell 100 may be spaced a predetermined distance apart.

The protection circuit module 200 may be disposed on one side of the unit cell 100. The protection circuit module 200 may include a circuit board 210 and an element unit 220 disposed on the circuit board 210. The protection circuit module 200 may be electrically connected to the unit cell 100 by being connected to the terminal unit 140 of the unit cell 100.

Meanwhile, the first tab part 120 may be located at one side of the unit cell 100. In FIG. 5, the first tab part 120 is illustrated as an example, but the configuration of the second tab part 130 is similar to that of the first tab part 120. As described above with reference to FIG. 3, the first tab part 120 includes one end portion 122, a central portion 120e, and the other end portion 124 including the first connection tab 120a and the first support tab 120b. Equipped. In FIG. 5, a cross section of the first support tab 120b is shown.

The first support tab 120b may be disposed to contact the first partition wall 310 of the outer case 300. The first support tab 120b includes a protruding bent portion 120c, and the protruding bent portion 120c may directly contact the first partition wall 310. The center portion of the first tab portion 120 may be disposed on the terrace portion 112 of the unit cell 100. In some cases, an insulating member is disposed between the first tab portion 120 and the unit cell 100 as shown in FIG. 5. 114 may be interposed. The insulating member 114 may be disposed to cover the terrace portion 112 and the side surface 104 of the unit cell 100.

The other end portion 124 of the first tab portion 120 may be electrically connected to the terminal portion 140 and the protection circuit module 200 of the unit cell 100. The other end 124 of the first tab 120 may be sandwiched between the terminal 140 of the unit cell 100 and the circuit board 210 of the protection circuit module 200. In some cases, as shown in FIG. 5, a connection lead 116 may be further disposed between the other end 124 of the first tab part 120 and the protection circuit module 200.

The first tab part 120 may be bent to correspond to the side wall of the terrace part 112 and the unit cell 100 of the unit cell 100. That is, one end portion 122 of the first tab portion 120 corresponds to the side surface 104 of the unit cell 100, and the center portion 120e of the first tab portion 120 is the terrace portion of the unit cell 100. Bend to correspond to 112).

On the other hand, the outer case 300 may accommodate the battery unit including the unit cell 100 and the protection circuit module 200 connected to the unit cell 100. In FIG. 5, the outer case 300 may be combined or disassembled with the unit cell 100 and the protection circuit module 200 in the z-axis direction. The outer case 300 includes an outer wall accommodating the unit cell 100 and the protection circuit module 200, and includes a first partition 310 and a second partition wall that guide and fix the protection circuit module 200 therein. 320). The overall shape of the outer case 300 is shown in FIG. 6.

Referring to FIGS. 5 and 6, the outer case 300 according to the present exemplary embodiment may be divided into a first area 300A1 that occupies a main area and a second area 300A2 on one side of the first area 300A1. Can be. The first area 300A1 of the outer case 300 may correspond to the first accommodating part 300a, and the second area 300A2 may correspond to the second accommodating part 300b. The first accommodating part 300a may be a part accommodating at least one or more unit cells 100, and the second accommodating part 300b may be a part on which the protection circuit module 200 is seated. On the other hand, one side of the outer case 300 may be provided with a terminal opening 302 so that the external terminal 240 of the protection circuit module 200 is exposed to the outside.

Since the first accommodating part 300a accommodates at least one or more unit cells 100, the first accommodating part 300a may occupy most of the space of the outer case 300. The first accommodating part 300a may include an opening OP to expose a part of the unit cell 100 to the outside. Heat generated in the unit cell 100 may be easily released to the outside through the opening OP.

The second accommodating part 300b may be located at one side of the first accommodating part 300a and may be located along one side of the outer case 300. The first accommodating part 300a and the second accommodating part 300b may be divided by the first partition wall 310 disposed therebetween. At least one unit cell 100 is accommodated in the first accommodating part 300a surrounded by the first partition 310 and the outer wall 330, and the second accommodating part 300b enclosed by the first partition 310 and the outer wall. The protection circuit module 200 may be accommodated. The first partition wall 310 may include at least one groove 312 to allow the terminal 140 to connect the unit cell 100 and the protection circuit module 200 to be positioned.

The second partition wall 320 may be disposed inside the outer case 300, that is, inside the second accommodating part 300b to correspond to the shape of the protective circuit module 200. The second partition wall 320 may be provided in various shapes in consideration of the shape of the circuit board 210 of the protection circuit module 200. The second partition wall 320 may serve to guide and fix the protection circuit module 200 at the outer shell. The second partition wall 320 may be provided to support the circuit board 210 from above, as shown in FIG. 5.

Meanwhile, the first partition wall 310 separates the first accommodating part 300a and the second accommodating part 300b to mount the unit cell 100 on the outer case 300 and at the same time, the temperature element part 400. Can serve as a supporter. Referring to FIG. 5, the first partition wall 310 may be disposed between the unit cell 100 and the protection circuit module 200. The first partition wall 310 is in contact with the bent portion 120c of the first tab portion 120 to support the first tab portion 120, and at the same time the temperature element portion connected to the first connection tab 120a of the first tab portion 120. 400 may be supported. The curved portion 120c of the first tab portion 120 has a shape protruding in the first direction (+ y direction), has elasticity along the Y axis, and is supported by the first partition wall 310 as if the curved portion 120c is pressed. It is possible to efficiently support the temperature element portion 400 without directly pressing the element portion 400.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims

A unit cell including an electrode assembly, a sealing case accommodating the electrode assembly, a terrace part extending in a first direction on one side of the sealing case, and a terminal part extending outward of the sealing case;

A protection circuit module positioned on one side of the unit battery so as to be electrically connected to the terminal unit, and disposed horizontally with the unit battery;

An outer case accommodating the unit battery and the protection circuit module and including a first partition wall disposed between the unit battery and the protection circuit module and extending in a second direction perpendicular to the first direction; And

A temperature element comprising a temperature element, a first lead and a second lead connected to both sides of the temperature element, and positioned between the unit cell and the first partition wall and supported by the first partition wall;

A battery pack having a.
The method of claim 1,

Is disposed on one side of the unit cell, one end is connected to the temperature element portion, the other end includes a first tab portion and the second tab portion, which is connected to the terminal portion and the protection circuit module, battery pack.
The method of claim 1,

The unit cell has a main surface parallel to the first plane and a side surface connected to the main plane and parallel to a second plane perpendicular to the first plane,

The temperature element is disposed in parallel with the side of the unit cell, the battery pack.
The method of claim 2,

And the first tab portion and the second tab portion are bent to contact the side surface of the unit cell and the terrace portion.
The method of claim 4, wherein

And the temperature element is disposed between the first tab portion and the second tab portion.
The method of claim 2,

The first tab part may include a first connection tab and a first support tab having a portion in contact with a side surface of the unit battery.

The second tab part includes a second connection tab and a second support tab having a divided portion in contact with a side surface of the unit cell.
The method of claim 6,

And the first lead is connected to the first connection tab, and the second lead is connected to the second connection tab.
The method of claim 6,

And the first support tab and the second support tab have a bent portion protruding in the first direction.
The method of claim 8,

The partition wall is in contact with the bent portion to support the temperature element portion, the battery pack.
The method of claim 2,

The outer case further includes a second partition spaced apart from the first partition wall,

The protection circuit module is located between the first partition and the second partition, the battery pack.
The method of claim 10,

The height of the first partition wall is higher than the height of the second partition wall.
The method of claim 10,

The protective circuit module includes a circuit board, and the second partition wall supports the circuit board.
The method of claim 12,

The circuit board includes a terminal groove, wherein the protective circuit module is electrically connected to the first tab portion and the second tab portion through the terminal groove.
The method of claim 1,

The battery pack further comprises an adhesive layer interposed between the temperature element portion and the side of the unit cell.
The method of claim 1,

The temperature device unit is disposed in a horizontal plane with the first partition wall.
A unit cell accommodating therein and having a main surface parallel to a first plane and a side surface connected to the main surface and parallel to a second plane perpendicular to the first plane;

A protection circuit module positioned on one side to be electrically connected to the unit battery and disposed in parallel with the main surface;

An outer case accommodating the unit cell and the protection circuit module and including a first partition wall disposed between the unit battery and the protection circuit module and disposed parallel to the side surface; And

A temperature element unit positioned between the unit cell and the first partition wall and disposed on a side surface of the unit cell;

A battery pack having a.