WO2014084474A1

WO2014084474A1 - Battery module and battery pack having the same

Info

Publication number: WO2014084474A1
Application number: PCT/KR2013/006110
Authority: WO
Inventors: Tae Il Kim; Kwan Yong Kim
Original assignee: SK Innovation Co Ltd
Current assignee: SK Innovation Co Ltd
Priority date: 2012-11-27
Filing date: 2013-07-10
Publication date: 2014-06-05
Anticipated expiration: 2015-05-27
Also published as: KR102122930B1; KR20140068326A

Abstract

Provided are a battery module and a battery pack having the same, the battery module including fixing parts formed at both sides, and an electrode terminal, a voltage sensing terminal, and a connector formed at one side thereof. The battery pack may be easily configured by stacking a plurality of battery modules, electrode terminals may be easily connected in series or in parallel with each other, and a voltage sensing line and a temperature sensor may be easily connected to the battery module.

Description

BATTERY MODULE AND BATTERY PACK HAVING THE SAME

The present invention relates to a battery module and a battery pack which is easily configured by stacking a plurality of battery modules.

Generally, a secondary battery is capable of being charged and discharged unlike a primary battery, and may be applied to various fields such as a digital camera, a cellular phone, a notebook and a hybrid car, and research thereof has been actively conducted. Examples of the secondary battery may include a nickel-cadmium battery, a nickel-metal hydride battery, a nickel-hydrogen battery, and a lithium secondary battery. In addition, among the secondary batteries, a great variety of studies for a lithium secondary battery having high energy density and discharge voltage have been conducted and the lithium secondary battery has been commercialized and widely used.

In addition, the lithium secondary battery is capable of being manufactured so as to have various shapes. Examples of the lithium secondary battery include a cylindrical type secondary battery and a prismatic type lithium secondary battery. A lithium polymer battery recently in the spotlight is manufactured in a pouched type having flexibility, and the shape thereof is relatively varied.

Since the pouch type lithium polymer battery (hereinafter, referred to as a “pouch type cell”) is easily bent or curved, a compact case is coupled to the outside thereof to reinforce low rigidity of the pouch type cell. In addition, due to a need for high output and large capacitance, a plurality of pouch type cells are stacked with each other to be configured as a battery module or a battery pack.

In this case, the battery module may be configured so as to receive a plurality of battery cells and electrically connect the battery cells to each other. However, the plurality of battery modules should be stacked with each other and electrically connected to each other, and respective battery cells should be connected to each other by sensing lines for sensing voltage and temperature.

As described above, since a plurality of battery cells or a plurality of battery modules should be coupled and electrically connected to each other in order to configure a battery module and a battery pack, respectively, there is a problem where a battery module and a battery pack are complicatedly configured.

As the related art document associated with the above-description, “POWER SWITCHING MODULE FOR BATTERY MODULE ASSEMBLY”, which is US Patent No. 20120183820, has been disclosed.

[Related Art Document]

[Patent Document]

US 20120183820 A1 (July 19, 2012)

An object of the present invention is to provide a battery module capable of easily configuring a battery pack by being stacked on one another, easily connecting electrode terminals in series or in parallel with each other and easily connecting a voltage sensing line and a temperature sensor to the battery module.

Another object is to provide a battery pack capable of easily configuring a voltage sensing line and a temperature sensing line by using pins that are not connected to the voltage sensing line in connectors of some battery modules as the temperature sensor connection line in connecting the terminals of battery modules to the connector by the voltage sensing lines, respectively.

In one general aspect, a battery module includes: a unit module having battery cells and a plurality of terminals formed at one side thereof; fixing parts formed at both sides of the unit module; and a connector coupled to one side of the unit module.

Further, the unit module may include two battery cells having electrode tabs formed at one side thereof and stacked in parallel with each other; a case being opened at both sides and having the battery cells received therein; a lower cap coupled to opened one side of the case and coupled to an opposite side to the side at which the electrode tabs are positioned; a connection mold having a plurality of terminals formed at one side thereof and inserted between facing electrode tabs of the two battery cells to allow the terminals to be connected to the electrode tabs; and an upper cap coupled to the opened other side of the case to which the lower cap is coupled, and including a cut part formed therein such that the terminals of the connection mold are exposed to the outside.

Furthermore, the lower cap and the upper cap each may be provided with a fixing part, and one side of the upper cap may be connected to a connector.

Furthermore, the two battery cells may be stacked such that a cathode tab and an anode tab face each other, the terminal may include a cathode terminal, an anode terminal and a voltage sensing terminal, the cathode terminal being connected to the cathode tab of a first battery cell, the anode terminal being connected to the anode tab of a second battery cell, and the voltage sensing terminal being connected to the anode tab of the first battery cell and the cathode tab of the second battery cell.

In another aspect, a battery pack includes: a plurality of battery modules stacked in parallel with each other; a base frame to which fixing parts of the battery modules are coupled; and a pair of side plates closely adhered to the outermost side of the battery modules and coupled to the base frame.

Furthermore, the battery modules may be connected to each other in series or in parallel, and further include a voltage sensing line connecting the terminals to the connector.

Furthermore, the cathode terminal and the anode terminal of the battery modules may be formed at the fixing part side and the voltage sensing terminal and the connector may be formed at an opposite side to the fixing part.

Furthermore, among the battery modules, the battery module disposed at the outermost side and the battery module disposed at an odd-numbered position based on the outermost battery module at one side thereof may include a cathode terminal, an anode terminal and a voltage sensing terminal, connected to the connector by the voltage sensing line, respectively, and the battery module disposed at an even-numbered position may include a voltage sensing terminal connected to the connector by a voltage sensing line.

Furthermore, the connector has three pins or more, the battery module may be provided with a temperature sensor, and a disconnected connector pin of the battery module disposed at an even-numbered position may be connected to the temperature sensor.

The battery module and the battery pack having the same according to an embodiment of the present invention are capable of easily configuring a battery pack by stacking a plurality of battery modules, easily connecting electrode terminals in series or in parallel with each other, and easily connecting a voltage sensing line and a temperature sensor to the battery module.

Furthermore, the battery module according to an embodiment of the present invention and the battery pack including the battery module can configure a voltage sensing line and a temperature sensing line by using pins that are not connected to the voltage sensing line in connectors of some battery modules as the temperature sensor connection line in connecting the terminals of battery modules to the connector by the voltage sensing lines, respectively.

FIGS. 1A and 1B are perspective views showing a battery cell according to an embodiment of the present invention;

FIGS. 2 and 3 are an exploded perspective view and an assembly perspective view showing a battery module according to an embodiment of the present invention;

FIGS. 4A and 4B and 5A and 5B are cross-sectional views taken along lines AA’, BB’, CC’, and DD’ of FIG. 3, respectively;

FIGS. 6 and 7 are an exploded perspective view and an assembly perspective view showing a battery pack according to an embodiment of the present invention; and

FIGS. 8 to 11A and 11B are schematic views showing a structure of connection of a voltage sensing line and a temperature sensing line in a battery pack according to an embodiment of the present invention.

[Detailed Description of Main Elements]

1000: battery module

100: battery cell

100a: first battery cell 100b: second battery cell

110: electrode body 120: electrode tab

120a: cathode tab 120b: anode tab

130: pouch

200: unit module

300: case

400: lower cap 410: fixing part

500: connection mold

510: terminal 511: cathode terminal

512: anode terminal 513: voltage sensing terminal

600: upper cap

610: cut part 620: fixing part

700: connector 710: connector pin

800: bus bar

2000: battery pack

1100: base frame 1200: side plate

1300: voltage sensing line 1400: temperature sensor

1500: temperature sensing line

Hereinafter, a battery module and a battery pack having the battery module according to an embodiment of the present invention as described above will be described in detail with reference to the accompanying drawings.

FIGS. 1A and 1B are perspective views showing a battery cell according to an embodiment of the present invention; and FIGS. 2 and 3 are an exploded perspective view and an assembly perspective view showing a battery module according to an embodiment of the present invention.

As illustrated in the drawings, a battery module 1000 according to an embodiment of the present invention includes a unit module 200 having battery cells 100 and a plurality of terminals 510 formed at one side thereof;

fixing parts

410 and 620 formed at both sides of the unit module 200; and a connector 700 coupled to one side of the unit module 200.

First, the unit module 200 includes the battery cell 100 capable of being charged and discharged and the plurality of terminals 510 formed at one side thereof. In addition, the unit module 200 includes the

fixing parts

410 and 620 formed at both sides of the unit module 200. The fixing

parts

410 and 620 may be formed such that brackets each having a penetration hole protrude toward both sides of the unit module to be supported by a reinforced rib. Furthermore, the connector 700 may be formed at one side of the unit module 200, such that the connector 700 may be formed at one side of the unit module 200 with the terminals 510.

Therefore, since the battery module according to an embodiment of the present invention may include the fixing parts, the plurality of battery modules are easily stacked and fixed with each other. Also, since the terminals and the connector are formed at one side of the battery module, the battery modules are easily connected to each other in series or in parallel and a voltage sensing lines for measuring voltage of each of the battery cells may be easily connected to the battery modules.

Further, the unit module 200 includes two battery cells 100 having electrode tabs 120 formed at one side thereof and stacked in parallel with each other; a case 300 being opened at both sides thereof and having the battery cells 100 received therein; a lower cap 400 coupled to opened one side of the case 300 and coupled to an opposite side to the side at which the electrode tabs 120 are positioned; a connection mold 500 having a plurality of terminals 510 formed at one side thereof and inserted between the facing electrode tabs 120 of the two battery cells 100 to allow the terminals 510 to be connected to the electrode tabs 120; and an upper cap 600 coupled to the opened other side of the case 300 to which the lower cap 400 is coupled, and having a cut part 610 allowing the terminals 510 of the connection mold 500 to be exposed to the outside.

The unit module 200 is configured in the manner that the two battery cells 100 are stacked with each other to be received in the case 300, the two battery cells 100 are connected to each other in series or in parallel by the connection mold 500 having the terminals 510, and the lower cap 400 and the upper cap 600 are coupled to the opened both sides of the case 300.

In this case, the battery cell 100 includes the electrode tab 120 formed at one side of an electrode body 110 as shown in FIG. 1, wherein the electrode body 110 is configured of a cathode, an anode, an electrolyte, and a separating plate that separates the cathode from the anode, in which charging and discharging are performed, and the electrode tab 120 transmits a current generated from the electrode body 110 at the time of being discharged or a current introduced from the outside at the time of being charged. In addition, the battery cell 100 may be a pouch type cell sealed so as to be surrounded with a pouch 130 or may have an external member coupled to an outside of the pouch type cell, and the electrode body 110 sealed by the pouch 130 may protrude to only one side surface thereof or both side surfaces thereof, based on the pouch 130.

Here, as shown in FIG. 2, the two battery cells 100 are stacked in parallel with each other such that the electrode tabs 120 face each other. In the case in which the electrode body 110 protrudes to one side surface of the pouch 130, the battery cells 100 are stacked such that protruding surfaces of the electrode body 110 are in contact with each other so that the pouches 130 of the two battery cells 100 are positioned at an outer portion of the battery cells 100 in a width direction. In other words, the battery cells 100 are stacked such that the electrode tabs 120 of the two battery cells 100 are spaced apart from each other at a predetermined interval without being in contact with each other.

Referring to FIG. 3, the case 300 may be opened at both sides thereof, such that the two stacked battery cells 100 are inserted into the case 300 to be received therein. The case 300 may be formed of a metal plate having a thin thickness of 0.1 mm to 1.0 mm, and a central portion of both surfaces thereof in a width direction may be recessed to an inner side of the case 300, or a plurality of grooves recessed to the inner side may be formed to allow the two battery cells 100 received in the case 300 to be closely adhered to each other.

An inner portion of the lower cap 400 may be hollow and an upper side thereof may be opened. The lower cap 400 may be coupled to the opened portion of the case 300 at an opposite side to the side at which the electrode tabs 120 of the battery cells 100 are positioned in a state in which the two battery cells 100 are inserted into the case 300. In other words, the lower cap 400 is formed as a cap type, and the opened lower side of the case 300 is inserted into a hollowed inner side of the lower cap 400 and fixed thereto, such that the lower side of the case 300 is closed.

The connection mold 500 having the plurality of terminals 510 formed therein may be inserted between the facing electrode tabs 120 of the two battery cells 100 and the terminals 510 may be electrically connected to the electrode tabs 120 by the welding process, while being inserted. In other words, since the connection mold 500 is inserted between the facing electrode tabs 120 of the two battery cells 100 to support the inner side thereof, the connection mold 500 allows the electrode tabs 120 to be easily welded to the terminals 510 after pressing electrode tabs 120 at the side surfaces thereof in a width direction of the connection mold 500 and serves to fix the terminals 510 connected to the electrode tab 120. In addition, before the connection mold 500 is inserted, a hot-melt, an adhesive, or the like may be applied between the two battery cells 100 and then the connection mold 500 may be inserted therebetween to be fixed.

In addition, after the connection mold 500 is insertedly coupled therebetween, the upper cap 600 is coupled to the upper side of the inserted connection mold 500. The upper cap 600 is formed such that the inner portion thereof is hollow, and the lower side thereof is opened, thereby being insertedly coupled to the outside of the case 300. Here, the cut part 610 exposing the terminals 510 of the connection mold 500 to the outside is formed, to allow the terminals 510 to be connected to external circuits after the upper cap 600 is coupled to the case 300.

Therefore, with respect to the battery module according to an embodiment of the present invention, the battery cells are firmly fixed in the case to thereby improve stability, and the battery cells are fixed in the compact case to thereby increase utilization of space, and the electrode tabs of the battery cells are electrically connected to each other with ease to thereby be easily assembled as a module.

Then, the lower cap 400 and the upper cap 600 may include fixing

parts

410 and 620, respectively, and one side of the upper cap 600 may be connected to the connector 700. In other words, the fixing

parts

410 and 620 are formed at the lower cap 400 and upper cap 600, respectively, which are disposed at both sides of the battery module 1000, such that the fixing

parts

410 and 620 may be formed integrally with the lower cap 400 and the upper cap 600 through injection molding, respectively. In addition, the upper cap 600 may include a connection part to which the connector 700 may be coupled, thereby facilitating the connection of the connector 700.

Here, the two battery cells 100 are stacked such that a cathode tab 120a and an anode tab 120b face each other, and the terminal 510 includes a cathode terminal 511, an anode terminal 512, and a voltage sensing terminal 513, wherein the cathode terminal 511 is connected to the cathode tab 120a of a first battery cell 100a, the anode terminal 512 is connected to the anode tab 120b of a second battery cell 100b, and the voltage sensing terminal 513 is connected to the anode tab 120b of the first battery cell 100a and the cathode tab 120a of the second battery cell 100b.

As shown in FIGS. 1A and 1B and FIG. 2, in order to connect the two battery cells 100 to each other in series, the electrode tabs 120 having different polarities of the battery cells 100 are stacked so as to face each other. Thus, as shown in FIG. 4A, the cathode tab 120a of the first battery cell 100a and the anode tab 120b of the second battery cell 100b may be coupled to each other by the voltage sensing terminal 513 so as to be connected to each other. As shown in FIG. 5, the other anode tab 120b of the first battery cell 100a is connected to the anode terminal 512 and the cathode tab 120a of the second battery cell 100b is coupled to the cathode terminal 511 so as to be connected to each other. Here, since the electrode tabs 120 having different polarities of the two battery cells 100 are stacked so as to face each other, it is preferable that the cathode terminal 511 and anode terminal 512 are formed at one side thereof in the longitudinal direction of the connection mold 500, and the voltage sensing terminal 513 is formed at the other side in the longitudinal direction.

Therefore, the two battery cells 100 may be connected to each other in series, such that the cathode terminal 511 and the anode terminal 512 may become output terminals connected to the external circuits, and the voltage sensing terminal 513 may be connected to the cathode terminal 511 and the anode terminal 512 through a separate protecting circuit, respectively, thereby measuring voltage of each of the

battery cells

100a and 100b.

Then, as shown in FIGS. 4 and 5, the cathode terminal 511 may be bent from the upper surface to one side surface of the connection mold 500, the anode terminal 512 may be bent from the upper surface to the other side surface of the connection mold 500, and the voltage sensing terminal 513 may be bent from the upper surface to both side surfaces of the connection mold 500. When the two battery cells 100 are connected to each other in series, the terminals 510 are easily coupled to the electrode tabs 120 by the welding process, and the terminals 510 formed on the upper surface of the connection mold 500 are bent such that the terminal 510 and the electrode tab 120 are coupled to each other by the welding process while they are overlapped with each other, so that the terminal is extended to the side surface of the connection mold 500 in the width direction. In other words, the anode terminal 512 is bent toward the anode tab 120b of the first battery cell 100a so as to have a “ㄱ" shape, the cathode terminal 511 is bent toward the cathode tab 120a of the second battery cell 100b so as to have a “ㄱ” shape, and the voltage sensing terminal 513 is bent toward the cathode tab 120a of the first battery cell 100a and the anode tab 120b of the second battery cell 100b so as to have a “ㄷ” shape.

In addition, a battery pack 2000 including the battery module 1000 according to an embodiment of the present invention includes: a plurality of battery modules 1000 stacked in parallel with each other; a base frame 1100 to which fixing

parts

410 and 620 of the battery modules 1000 are coupled; and a pair of side plates 1200 closely adhered to the outermost side of the battery modules 1000 and coupled to the base frame 1100.

As shown in FIGS. 6 and 7, the battery pack 2000 is formed such that the plurality of battery modules 1000 having the fixing

parts

410 and 620 formed at both sides thereof are fixed to the base frame 1100 and stacked with each other in parallel, and thus the battery modules 1000 are coupled to the base frame 1100 while the side plates 1200 are closely adhered to the outside of the respective battery modules 1000 disposed at the outermost side.

Therefore, in the battery pack according to an embodiment of the present invention, the battery pack may have an easy structure by stacking the plurality of battery modules, the terminals and connectors of the battery modules are disposed at one side of the battery pack such that the electrode terminals may be connected to each other in series or in parallel, and the battery pack may have an easy structure of a voltage sensing line for measuring voltage of each of the battery cells.

In addition, the battery modules 1000 are connected to each other in series or in parallel, and the battery pack 2000 includes a voltage sensing line 1300 connecting the terminals 510 to the connector 700. In other words, a plurality of battery modules 1000 are stacked with each other and fixed, the cathode terminals 511 and the anode terminals 512 are coupled to each other by bus bars 800 such that the battery modules 1000 are connected to each other in series or in parallel, and each of the battery modules 1000 is configured such that the terminals 510 are connected to the connector 700 by the voltage sensing line 1300, respectively, such that voltage of each of the battery cells 100 may be measured.

Furthermore, in the battery pack 2000 includnig the battery modules 1000 stacked therein, the battery modules 1000 in which the two battery cells 100 are connected to each other in series, the cathode terminal 511 and anode terminal 512 of the battery modules 1000 are formed at the fixing part side 620, and the voltage sensing terminal 513 and connector 700 may be formed at an opposite side to the fixing part side 620.

As shown in FIG. 7, the fixing part 620 is formed at a lower side of the battery module 1000 at which the cathode terminal 511 and anode terminal 512 are formed, to thereby easily fix the fixing part 620 to the base frame 1100, and the cathode terminals 511 and anode terminals 512 of the plurality of battery modules 1000 are connected to each other by the bus bars 800, to thereby easily connecting the battery modules 1000 in series or in parallel. Furthermore, the voltage sensing terminal 513 and connector 700 are formed at an opposite side to the fixing part, such that the voltage sensing terminal 513 and connector 700 may be easily connected to each other.

In addition, the battery modules 1000 may be connected to each other in series or in parallel, and the battery pack 2000 may further include the voltage sensing line 1300 connecting the terminals 510 to the connector 700. In other words, as shown in FIGS. 8 and 9, the cathode terminals 511 and anode terminals 512 of the battery modules 1000 may be connected to each other in series by a bus bar 800, and then be connected to each other by the voltage sensing line 1300, and thus voltage of each of the battery cells 100 may be measured. Furthermore, as shown in FIG. 10, the plurality of battery modules 1000 may also be configured so as to be connected to each other in parallel.

Furthermore, among the battery modules 1000, the battery module 1000 disposed at the outermost side and the battery module 1000 disposed at an odd-numbered position based on the outermost battery module 1000 at one side thereof may include a cathode terminal 511, an anode terminal 512 and a voltage sensing terminal 513, connected to a connector 700 by the voltage sensing line 1300, respectively, and the battery module 1000 disposed at an even-numbered position may include a voltage sensing terminal 513 connected to a connector 700 by a voltage sensing line 1300.

The whole battery modules 1000 are configured such that the cathode terminal 511, the anode terminal 512 and the voltage sensing terminal 513 may be connected to the connector 700 by the voltage sensing line 1300, respectively. However, as shown in FIG. 8, the battery modules 1000 disposed at even-numbered positions based on the outermost battery module 1000 at one side thereof may include only the voltage sensing terminal 513 connected to the connector 700. Thus, the same connector 700 may be used for every battery module 1000 to allow the battery modules 1000 disposed at even-numbered positions to have available connector pins 710.

Therefore, a temperature sensor or various sensors may be connected to a disconnected connector pin 710 of the connector 700.

Then, with the outermost battery modules 1000 and the battery modules 1000 disposed at odd-numbered positions respectively, a connector pin 710 at which the cathode terminal 511 and the voltage sensing terminal 513 are connected to each other and a connector pin 710 at which the anode terminal 512 and the voltage sensing terminal 513 are connected to each other may be connected to each other, such that voltage of two battery cells 100 may be measured. Also, voltage of the battery modules 1000 disposed at even-numbered positions may be measured using voltage values of each of the battery cells 100 which have been measured in the battery modules 1000 disposed at the left and right thereof.

In other words, when measuring voltage by connecting a connector pin 710 to which the voltage sensing terminal 513 of the battery module 1000 disposed at an even-numbered position is connected to a connector pin 710 to which the cathode terminal 511 of the battery module 1000 disposed at the left side thereof is connected, the voltage of the battery module 1000 disposed at an even-numbered position may be measured and thus, the voltage of two battery cells 100 in the battery module 1000 at the left side thereof may be measured. Therefore, the voltage value of one battery cell 100 in the battery module 1000 disposed at an even-numbered position may be calculated by using the measured value. Similarly, when measuring voltage by connecting a connector pin 710 to which the voltage sensing terminal 513 of the battery module 1000 disposed at an even-numbered position is connected to a connector pin 710 to which the anode terminal 511 of the battery module 1000 disposed at the right side is connected, the voltage of the battery module 1000 disposed at an even-numbered position may be measured and then, the voltage of the other battery cell 100 may be also calculated as described above.

Furthermore, the connector 700 is configured of three pins or more, the battery module 1000 may include a temperature sensor 1400, and a disconnected connector pin 710 of the connector of the battery module 1000 disposed at an even-numbered position may be connected to the temperature sensor 1400.

In other words, when the connector 700 is configured of three pins, the battery module 1000 is provided with the temperature sensor 1400, such that the two disconnected connector pins 710 of the connector 700 of the battery module 1000 disposed at an even-numbered position may be connected to the temperature sensor 1400 by a temperature sensing line 1500. Furthermore, when the connector pins 710 are configured of three pins or more, for example, in the case of five pins, three pins each may be connected to the voltage sensing lines 1300 and the other two pins may be connected to the temperature sensing lines. In this case, when the connector 700 is configured of three pins, the size of the connector 700 may be reduced to reduce the volume of battery pack, and the number of remaining connector pins may be reduced to reduce the manufacturing cost thereof.

Therefore, a separate connector 700 or a connector pin 710 connecting the temperature sensor 1400 is not required, thereby making it possible to simplify the configuration of the connector 700.

As shown in FIG. 11A, an odd number of battery modules 1000 is formed, such that in the battery module 1000 disposed at an even-numbered position, only one connector pin 710 is used for connecting the voltage sensing line 1300 and the other two connector pins 710 are used for connecting the temperature sensing line 1500 and thus the battery modules 1000 disposed at even-numbered positions may be provided with the temperature sensor 1400. Furthermore, as shown in FIG. 11B, the three battery modules 1000 may be configured as one unit so that the battery module 1000 interposed therebetween may be provided with the temperature sensor 1400.

The present invention is not limited to the above-mentioned embodiments but may be variously applied. In addition, it will be appreciated by those skilled in the art that various modifications and changes may be made without departing from the appended claims of the present invention.

Claims

A battery module, comprising:

a unit module having battery cells and a plurality of terminals formed at one side thereof;

fixing parts formed at both sides of the unit module; and

a connector coupled to one side of the unit module.
The battery module of claim 1, wherein the unit module includes:

two battery cells having electrode tabs formed at one side thereof and stacked in parallel with each other;

a case being opened at both sides thereof and having the battery cells received therein;

a lower cap coupled to opened one side of the case and coupled to an opposite side to the side at which the electrode tabs are positioned;

a connection mold having a plurality of terminals formed at one side thereof and inserted between facing electrode tabs of the two battery cells to allow the terminals to be connected to the electrode tabs; and

an upper cap coupled to the opened other side of the case to which the lower cap is coupled, and including a cut part formed therein to allow the terminals of the connection mold to be exposed to the outside.
The battery module of claim 2, wherein the lower cap and the upper cap each are provided with a fixing part and one side of the upper cap is connected to a connector.
The battery module of claim 2, wherein the two battery cells are stacked in such a manner that a cathode tab and an anode tab face each other, and

wherein the terminal includes a cathode terminal, an anode terminal, and a voltage sensing terminal,

the cathode terminal being connected to the cathode tab of a first battery cell, the anode terminal being connected to the anode tab of a second battery cell, and the voltage sensing terminal being connected to the anode tab of the first battery cell and the cathode tab of the second battery cell.
A battery pack, comprising:

the plurality of battery modules of any one of claims 1 to 3 stacked in parallel with each other;

a base frame to which fixing parts of the battery modules are coupled; and

a pair of side plates closely adhered to an outermost side of the battery modules and coupled to the base frame.
The battery pack of claim 5, further comprising a voltage sensing line connecting the terminals to the connector, wherein the battery modules are connected to each other in series or in parallel.
A battery pack, comprising:

the plurality of battery modules of claim 4 stacked in parallel with each other;

a base frame to which fixing parts of the battery modules are coupled; and

a pair of side plates closely adhered to an outermost side of the battery modules and coupled to the base frame.
The battery pack of claim 7, wherein the cathode terminals and the anode terminals of the battery modules are formed at the fixing part side and the voltage sensing terminal and the connector are formed at an opposite side to the fixing part side.
The battery pack of claim 7, further comprising a voltage sensing line connecting the terminals to the connector, wherein the battery modules are connected to each other in series or in parallel.
The battery pack of claim 9, wherein among the battery modules, the battery module disposed at the outermost side and the battery module disposed at an odd-numbered position based on the outermost battery module at one side thereof include a cathode terminal, an anode terminal, and a voltage sensing terminal, connected to a connector by the voltage sensing line, respectively, and the battery module disposed at an even-numbered position includes a voltage sensing terminal connected to a connector by a voltage sensing line.
The battery pack of claim 10, wherein the connector is configured of three pins or more, the battery module is provided with a temperature sensor, and a disconnected connector pin of the battery module disposed at the even-numbered position is connected to the temperature sensor.