KR102364930B1 - Battery Pack Comprising coverlay - Google Patents

Abstract

The present invention is a unit cell stack in which a plurality of unit cells are stacked; a coverlay electrically connected to the unit cells and bent at least once; and a battery management system plate comprising a battery management system electrically connected to the coverlay. It relates to a battery pack, wherein the coverlay includes a battery management system connection unit, and the battery management system and the coverlay are electrically connected to each other through the battery management system connection unit.

Description

Battery pack comprising a coverlay {Battery Pack Comprising coverlay}

The present invention relates to a battery pack including a coverlay.

As technology development and demand for mobile devices increase, the demand for secondary batteries as an energy source is rapidly increasing.

The secondary battery may be used in the form of a single battery cell or in the form of a battery cell stack in which a plurality of unit cells are electrically connected, depending on the type of external device in which it is used. For example, small devices such as mobile phones can operate for a predetermined time with the output and capacity of one battery cell, while medium-sized devices such as notebook computers, portable DVDs, small PCs, electric vehicles, hybrid electric vehicles, etc. Alternatively, large devices require the use of a battery pack including a battery cell stack due to problems of high output and high capacity.

Such a battery pack is manufactured by connecting a safety control device or the like to a battery cell stack in which a plurality of unit cells are arranged and connected in series and/or in parallel. When a prismatic or pouch-type battery is used as the unit cell, it can be easily manufactured by stacking the wide surfaces to face each other and then connecting the electrode terminals by a connection member such as a bus bar. Accordingly, when manufacturing a three-dimensional battery pack having a hexahedral structure, a prismatic or pouch-type battery is advantageous as a unit battery.

However, in the case of a battery pack requiring high output and high capacity, since a connection member for connecting a plurality of battery cells and various safety control devices must be included, there is a problem in that the overall volume and weight of the battery pack increase.

Accordingly, there is a high need for a technology capable of fundamentally solving these problems.

An object of the present invention is to solve the problems of the prior art as described above and the technical problems that have been requested from the past.

After the inventors of the present application repeated in-depth research and various experiments, the battery pack includes a bent coverlay (COVERLAY), and the coverlay includes a battery management system connection part, and a battery management system connection part The coverlay is electrically connected to the battery management system through It was confirmed that the volume and weight of the battery pack can be reduced as well as a compact battery pack can be manufactured because separate connecting members are not required, and thus the present invention has been completed.

The battery pack according to the present invention for achieving this object is a unit cell stack in which a plurality of unit cells are stacked, a coverlay electrically connected to the unit cells and bent at least once, and electrically connected to the coverlay and a battery management system plate including a battery management system comprising: a battery management system, wherein the coverlay includes a battery management system connection part, and the battery management system and the coverlay are electrically connected through the battery management system connection part.

The battery management system connecting portion and the battery management system plate are coupled.

The coverlay includes at least two coverlay portions formed in a plate-like shape having a length compared to a width, and the coverlay portion extends in a direction crossing an extension direction of the electrode terminals of the unit cells.

The coverlay includes at least one bent portion, and the bent portion includes a cutout having a relatively reduced width.

The coverlay includes an electrode terminal connection part and an insulating layer, and the electrode terminal connection part is laminated on the insulating layer.

The unit cells are electrically connected in parallel or in series by the electrode terminal connection part.

The battery management system connection part is located at the center of the coverlay based on the longitudinal direction of the coverlay.

The battery management system connection part includes an extension part extending in a direction in which the electrode terminal of the unit cell extends from the coverlay.

The battery management system connection part further includes a connection terminal formed at an end of the extension part.

The connection terminal is bent in an inner direction of the battery pack in a direction in which the extension portion extends and is coupled to the battery management system plate.

The outermost electrode terminal ends located on both sides in the longitudinal direction of the coverlay extend in the direction in which the electrode terminals of the unit cell extend, are bent in the inner direction of the battery pack, and are coupled to the battery management system plate.

The power supply terminal portions located on both sides of the coverlay in the longitudinal direction extend in the direction in which the electrode terminals of the unit cells extend, are bent in the inner direction of the battery pack, and are coupled to the battery management system plate.

A battery management system mounting part is formed by the extension part, the outermost electrode terminal end part, and the power supply terminal part, and the battery management system plate is located in the battery management system mounting part.

The connection terminal, the distal end of the outermost electrode terminal, and the power supply terminal surround the side and upper surfaces of the battery management system plate.

It further includes an external connector positioned on the upper surface of the battery management system plate.

It further includes an elastic member interposed between the unit cells.

A battery pack according to another embodiment of the present invention includes a unit cell stack in which a plurality of unit cells are stacked, a coverlay electrically connected to the unit cells and bent at least once, and a battery electrically connected to the coverlay. a battery management system plate including a management system, and a rigid rigid layer, wherein the coverlay includes a battery management system connector through which the battery management system and the coverlay are electrically connected. .

The battery management system connection part includes an extension part extending in a direction in which the electrode terminal of the unit cell extends from the coverlay, a connection terminal is formed at an end of the extension part, and the connection terminal is in a direction in which the extension part extends is bent in the inner direction of the battery pack and coupled to the battery management system plate, and the outermost electrode terminal end located on both sides of the coverlay in the longitudinal direction extends in the direction in which the electrode terminal of the unit cell extends and the battery The power supply terminal portion is bent in the inner direction of the pack and coupled to the battery management system plate, and the power supply terminal portions located on both sides of the coverlay in the longitudinal direction extend in the direction in which the electrode terminal of the unit cell extends and in the inner direction of the battery pack. bent and coupled to the battery management system plate, a battery management system mounting portion is formed by the extension portion, the outermost electrode terminal end portion, and the power supply terminal portion, the battery management system plate is located in the battery management system mounting portion And, the connection terminal, the outermost electrode terminal end portion, and the power supply terminal portion is formed in a structure surrounding the side and upper surface of the battery management system plate.

It further includes an external connector located on the upper surface of the battery management system plate.

The present invention may also provide a device including the battery pack as a power source, wherein the device is an unmanned aerial vehicle, an electric vehicle, a hybrid electric vehicle, an electric motorcycle, an electric bicycle, an energy storage system, or an uninterruptible power supply (UPS). It may be one selected from among.

Since the structure of these devices and a method for manufacturing the same are known in the art, detailed description thereof will be omitted herein.

The battery pack according to the present invention includes a bent coverlay electrically connected to unit cells, the coverlay includes a battery management system connection part, and is electrically connected to the battery management system through the battery management system connection part, and the extension part The battery management system mounting portion is formed by the , the outermost electrode terminal end portion, and the power supply terminal portion, and the battery management system plate is configured to be located in the battery management system mounting portion, thereby reducing the volume and weight of the battery pack and making it compact There is an effect that a battery pack can be manufactured.

1 is a schematic diagram of a battery pack according to an embodiment of the present invention;
Fig. 2 is a schematic diagram of the coverlay of Fig. 1;
3 is a schematic view showing a shape in which the coverlay of FIG. 2 is connected to the unit cells before being bent;
FIG. 4 is a schematic view showing a battery management system mounting unit formed on the coverlay of FIG. 2 ;
5 is a schematic diagram of a battery management system connected to the coverlay before being bent in FIG. 3

Hereinafter, although described with reference to the drawings according to an embodiment of the present invention, this is for easier understanding of the present invention, and the scope of the present invention is not limited thereto.

1 is a schematic diagram of a battery pack according to an embodiment of the present invention. FIG. 2 is a schematic diagram of the coverlay of FIG. 1 .

1 and 2, the battery pack 10 includes a unit cell stack 100 in which unit cells 110, 120, 130, 140, 150, and 160 are stacked, unit cells 110, 120, 130, The battery management system plate 300 is electrically connected to 140 , 150 , and 160 , and includes a coverlay 200 having a bent structure and a battery management system electrically connected to the coverlay 200 . In particular, the coverlay 200 includes a battery management system connection unit 210 , and is electrically connected to the battery management system through the battery management system connection unit 210 , and the coverlay 200 is electrically connected to the battery management system connection unit 210 by the battery management system connection unit 210 . ) and the battery management system plate 300 may be directly coupled.

3 is a schematic diagram illustrating a shape in which the coverlay of FIG. 2 is connected to unit cells before being bent.

1 to 3 , the coverlay 200 includes electrode terminal connection parts 230: 230a, 230b, 230c, 230d, 230e and an insulating layer 220, and an electrode terminal connection part on the insulating layer 220. (230) is laminated. The insulating layer 220 may be located on one or both surfaces of the electrode terminal connection part 230 . The coverlay 200 further includes plate-shaped coverlay portions 241, 242, 243, 244, 245, and 246 having a long length to width, and coverlay portions 241, 242, 243, 244, 245, 246. is the direction in which the electrode terminals 111, 112, 121, 122, 131, 132, 141, 142, 151, 152, 161, 162 of the unit cells 110, 120, 130, 140, 150, 160 extend and It extends in a direction that intersects vertically.

The unit cells 110 , 120 , 130 , 140 , 150 , and 160 having the same size and shape are electrically connected in series by the electrode terminal connection part 230 . Specifically, adjacent unit cells 110 and 120 connected in series by the electrode terminal connection part 230a are stacked so that the front surfaces 113 and 123 of the unit cells 110 and 120 face each other. The adjacent unit cells 130 and 140 connected in series by the electrode terminal connection part 230c are stacked on each other so that the front surfaces 133 and 143 of the unit cells 130 and 140 face each other. Similarly, adjacent unit cells 150 and 160 connected in series by the electrode terminal connection part 230e are stacked so that the front surfaces 153 and 163 of the unit cells 150 and 160 face each other. However, adjacent unit cells 120 and 130 connected in series by the electrode terminal connection part 230b are stacked so that the front surfaces 120 and 130 of the unit cells 120 and 130 face each other. Similarly, the adjacent unit cells 140 and 150 connected in series by the electrode terminal connection part 230d are stacked so that the front surfaces 143 and 153 of the unit cells 140 and 150 face each other.

The number of unit cells 110 , 120 , 130 , 140 , 150 , 160 may be determined according to the output, capacity, and shape of the battery pack 10 , and the unit cells 110 , 120 , 130 , 140 , 150 , 160 . may be connected in various structures by the electrode terminal connection unit 230 such as parallel and series/parallel as well as in series. In addition, the shape and size of the unit cells 110 , 120 , 130 , 140 , 150 , 160 may be formed in various ways in consideration of the internal space of the device in which the battery pack 10 is mounted.

The electrode terminal 112 of the unit cell 110 and the electrode terminal 121 of the unit cell 120 are directly connected to the electrode terminal connection part 230a without a separate connection member. The electrode terminal 122 of the unit cell 120 and the electrode terminal 131 of the unit cell 130 are directly connected to the electrode terminal connection part 230b without a separate connection member. The electrode terminal 132 of the unit cell 130 and the electrode terminal 141 of the unit cell 140 are directly connected to the electrode terminal connection part 230c without a separate connection member. The electrode terminal 142 of the unit cell 140 and the electrode terminal 151 of the unit cell 150 are directly connected to the electrode terminal connection part 230D without a separate connection member. The electrode terminal 152 of the unit cell 150 and the electrode terminal 162 of the unit cell 160 are directly connected to the electrode terminal connection part 230e without a separate connection member. The electrode terminals 112 , 121 , 122 , 131 , 132 , 141 , 142 , 151 , 152 , and 162 may be connected to the electrode terminal connection part 230 by soldering or the like. In another embodiment, the electrode terminals 112 , 121 , 122 , 131 , 132 , 141 , 142 , 151 , 152 , and 162 may be connected to the electrode terminal connection part 230 through a separate connection member. As an example, the connecting member may be a conductive plate-shaped member bent in a “U” shape. The electrode terminal corresponding to the space formed inside the connection member may be inserted and fixed. The electrode terminals 112 , 121 , 122 , 131 , 132 , 141 , 142 , 151 , 152 , and 162 inserted into the connection member may be fixed by soldering, laser welding, or the like.

The coverlay 200 includes bent portions A1 , A2 , A3 , and A4 . The bent portions A1, A2, A3, and A4 have a “c” shape in which two angled corners are formed while the coverlay 200 is folded by 180 degrees. The shape of the bent portions A1 , A2 , A3 , and A4 is not limited to the “C” shape, and may be formed in various ways according to the shape of the coverlay 200 . The number of the bent portions A1 , A2 , A3 , and A4 may increase or decrease according to the number of unit cells 110 , 120 , 130 , 140 , 150 , 160 and the bent shape of the coverlay 200 . Cutouts B1, B2, B3, B4, and B5 having relatively reduced widths are formed at the two angled corners of the bent portions A1, A2, A3, and A4. The coverlay 200 may be easily bent by the cutouts B1, B2, B3, B4, and B5. In addition, the same effect may be achieved by forming a notch in place of the cutouts B1, B2, B3, B4, and B5.

The coverlay 200 includes plate-shaped coverlay portions 241 , 242 , 243 , 244 , 245 , and 246 having a long length to width. The coverlay units 241 and 242 extend from two angled corners of the bent portion A1, respectively, and are spaced apart from each other in parallel by the stacked height of the unit cells 110 and 120 . The coverlay unit 241 extends in a direction crossing the direction in which the electrode terminals 111 and 112 of the unit cell 110 extend. Similarly, the coverlay unit 242 extends in a direction crossing the extending direction of the electrode terminals 121 and 122 of the unit cell 120 .

The coverlay portions 243 and 244 extend from two angled corners of the bent portion A3, respectively, and are spaced apart from each other in parallel by the stacked height of the unit cells 130 and 140 . The coverlay unit 243 extends in a direction crossing the direction in which the electrode terminals 131 and 132 of the unit cell 130 extend. Similarly, the coverlay unit 244 extends in a direction crossing the extending direction of the electrode terminals 141 and 142 of the unit cell 140 .

The coverlay portions 245 and 246 extend from two angled corners of the bent portion A4, respectively, and are spaced apart from each other in parallel by the stacked height of the unit cells 130 and 140 . The coverlay unit 243 extends in a direction crossing the direction in which the electrode terminals 131 and 132 of the unit cell 130 extend. Similarly, the coverlay unit 244 extends in a direction crossing the extending direction of the electrode terminals 141 and 142 of the unit cell 140 .

The coverlay units 242 and 243 extend from two angled corners of the bent portion A2, respectively, and the unit cells 120 and 130 are spaced apart from each other in parallel by a spaced distance. Similarly, the coverlay portions 244 and 245 extend from two angled corners of the bent portion A4, respectively, and the unit cells 140 and 150 are spaced apart from each other in parallel by a spaced distance.

The coverlay 200 further includes a battery management system connection unit 210 . The battery management system connection part 210 is located at the center in the longitudinal direction in the shape before the coverlay 200 is bent (see FIG. 3 ). The location of the battery management system connection part 210 is not particularly limited, but may be determined according to the number of unit cells 110 , 120 , 130 , 140 , 150 , 160 and the shape of the battery management system plate 300 .

The battery management system connection unit 210 includes electrode terminals 111 , 112 , 121 , 122 , 131 , 132 , 141 , 142 of the unit cells 110 , 120 , 130 , 140 , 150 , 160 from the coverlay 200 , 151 , 152 , 161 , and 162 include an extension portion 211 extending in an extension direction. The extension part 211 is a part of the electrode terminal connection parts 230a, 230b, 230d, and 230e connecting the unit cells 110 , 120 , 130 , 140 , 150 , 160 to form the battery management system connection part 210 . A portion extending along the longitudinal direction of the coverlay 200 is a portion of the electrode terminal connection portion 203c together with the electrode terminals 111 , 112 , 121 of the unit cells 110 , 120 , 130 , 140 , 150 , 160 , 122, 131, 132, 141, 142, 151, 152, 161, 162) are further extended in the extending direction. An insulating layer 220 is formed on one surface of the extended part 211 , and the insulating layer 220 extends along the extended part 211 .

A connection terminal 212 is formed at an end of the extension 220 . The connection terminal 212 is bent in the inner direction of the battery pack 10 in the direction in which the extension part 220 is extended to be connected to the battery management system plate 300 . The connection terminal 212 has a structure surrounding the side surface and the upper surface of the battery management system plate 300 . The insulating layer 220 is not formed on the connection terminal 212 .

The coverlay 200 further includes outermost electrode terminal connecting portions 231 and 232 positioned on both sides in the longitudinal direction. The outermost electrode terminal connection part 231 is electrically connected to the electrode terminal 111 of the unit cell 110 positioned at the outermost portion of the unit cell stack 100 . The outermost electrode terminal connection part 231 is extended in the direction in which the electrode terminal 111 is extended and is bent in the inner direction of the battery pack 10 to be connected to the battery management system plate 300 . The outermost electrode terminal connector 231 has a structure surrounding the side and upper surfaces of the battery management system plate 300 .

The outermost electrode terminal connection part 232 is formed on the other surface opposite to one surface of the unit cell stack 100 on which the outermost electrode terminal connection part 231 is formed. The outermost electrode terminal connection part 232 is electrically connected to the electrode terminal 161 of the unit cell 160 located at the outermost part. The outermost electrode terminal connection part 232 extends in the direction in which the electrode terminal 161 extends and is bent in the inner direction of the battery pack 10 to be connected to the battery management system plate 300 . The outermost electrode terminal connection part 232 is formed in a structure surrounding the side and upper surfaces of the battery management system plate 300 .

The coverlay 200 further includes power supply terminal portions 233 and 234 located on both sides in the longitudinal direction. The power supply terminals 233 and 234 supply power to the device in which the battery pack 10 is mounted through the external connector 310 located on the upper surface of the battery management system plate 300 . The power supply terminal unit 233 is electrically connected to the electrode terminal 111 of the unit cell 110 positioned at the outermost portion of the unit cell stack 100 . The power supply terminal unit 233 is connected to the battery management system plate 300 by extending in the direction in which the electrode terminal 111 extends and bending in the inner direction of the battery pack 10 . The power supply terminal unit 233 is formed in a structure surrounding the side and upper surfaces of the battery management system plate 300 .

The power supply terminal part 234 is formed on the other surface opposite to one surface of the unit cell stack 100 on which the power supply terminal part 233 is formed. The power supply terminal part 234 is electrically connected to the electrode terminal 161 of the unit cell 160 located at the outermost part. The power supply terminal unit 234 is connected to the battery management system plate 300 by extending in the direction in which the electrode terminal 161 extends and bending in the inner direction of the battery pack 10 . The power supply terminal 234 has a structure surrounding the side and upper surfaces of the battery management system plate 300 .

FIG. 4 is a schematic view showing a battery management system mounting unit formed on the coverlay of FIG. 2 .

1 to 4 , as described above, the battery management system connection part 210 , the outermost electrode terminal connection parts 231 and 232 , and the power supply terminal parts 233 and 234 are the battery management system plate 300 . ) is formed in a structure that surrounds the side and upper surfaces of the The battery management system mounting unit 330 (refer to FIG. 4 ) is formed on the coverlay 200 by this structure, and the battery management system plate 300 is firmly positioned on the battery management system mounting unit 330 without a separate binding member. can do.

The coverlay 200 may further include a rigid rigid layer 250 . In particular, the rigid rigid layer may be positioned on one or both surfaces of the coverlay units 241 , 242 , 243 , 244 , 245 , and 246 . The rigid rigid layer 250 may firmly support the battery management system plate 300 when the battery management system plate 300 is mounted on the battery management system mounting unit 330 .

The battery management system plate 300 includes a state monitoring unit, an algorithm operation unit, a command control unit, a protection circuit unit, and a communication unit. The state monitoring unit measures the voltage, current, and temperature of the unit cells (110, 120, 130, 140, 150, 160), and the algorithm operation unit performs SOC (Sate of Charge), SOH (State of Health) and various cell balancing. (Cell Balancing) Calculates the algorithm. The command control unit is responsible for sending a control signal to the switch to perform a cell balancing or protection function, and the protection circuit unit controls the voltage or current of the unit cells 110 , 120 , 130 , 140 , 150 , 160 to overvoltage , overcurrent, overcharge, overdischarge, short circuit, reverse voltage, etc. are monitored and blocked to protect the unit cells 110 , 120 , 130 , 140 , 150 and 160 . The protection circuit unit includes a field effect transistor, an integrated circuit, a positive temperature coefficient, a switching element, and the like. And, the communication unit is configured to perform CAN (Controller Area Network) communication between the master and the slave, or RS-232C communication from the master to an external device. An external connector 310 is formed on the upper surface of the battery management system plate 300 to be used as a communication and power supply terminal with an external device.

Referring to FIG. 1 , the battery pack 10 further includes elastic members 400 , 410 , 420 , 430 and 440 . The elastic member 400 is interposed between the unit cells 110 and 120 , the elastic member 410 is interposed between the unit cells 120 and 130 , and the elastic member 420 is interposed between the unit cells 130 and 140 . ), the elastic member 430 is interposed between the unit cells 110 and 120 , and the elastic member 440 is interposed between the unit cells 110 and 120 . The elastic members 400, 410, 420, 430, and 440 of the unit cells 110, 120, 130, 140, 150, 160 during charging and discharging of the unit cells 110, 120, 130, 140, 150, 160 It has elasticity to accommodate volume changes. Also, the elastic members 400 , 410 , 420 , 430 , and 440 may be adhesive tapes for fixing the unit cells 110 , 120 , 130 , 140 , 150 , 160 .

5 is a schematic diagram of a battery management system plate connected to the coverlay before being bent in FIG. 3 . A process of manufacturing the battery pack according to the present invention will be described with reference to FIGS. 2 and 3 to 5 .

First, as shown in FIG. 3 , the unit cells 110 , 120 , 130 , 140 , 150 and 160 are electrically connected to the coverlay 200 before being bent. Then, as shown in FIG. 5 , the battery management system plate 300 is connected to the battery management system connection unit 210 . Then, as shown in FIG. 2 , the unit cells 110 , 120 , 130 , 140 , 150 , and 160 are stacked to form the unit cell stack 100 and the coverlay 200 is bent. Then, the battery management system plate 300 is bent at 90 degrees to mount the battery management system plate 300 on the battery management system mounting unit 330 formed on the bent coverlay 200 . Finally, the outermost electrode terminal connection parts 231 and 232 and the power supply terminal parts 233 and 234 are bent and connected to the battery management system plate 300 .

In the present invention, the unit cells 110 , 120 , 130 , 140 , 150 , and 160 may be formed in a stack type, a stack/folding type, or a lamination-stack type, but they are combined into one battery Of course, it is also possible to have a built-in form in the case. Detailed information about the electrode group of the stack/folding structure is disclosed in Korean Patent Application Publication Nos. 2001??0082058, 2001??0082059, and 2001??0082060, and the applications are the content of the present invention incorporated by reference in

The battery case has an inner surface structure corresponding to the outer surface of the electrode assembly so as to minimize the volume of the unit cells 110, 120, 130, 140, 150, 160 manufactured in which the electrode assembly is accommodated. there may be In addition, the outer surface structure of the battery case may also have a structure in which a volume is minimized corresponding to the outer surface of the electrode assembly.

The battery case may be a pouch-type battery case made of a laminate sheet including a resin layer and a metal layer or a metal can.

The metal can-type battery case may have a hollow structure made of a metal material, and the pouch-type battery case may be formed of a laminate sheet including a resin layer and a metal layer.

The laminate sheet may have a structure in which a resin layer is coated on both sides of the metal barrier layer, for example, a resin outer layer with excellent durability is added to one surface (outer surface) of the metal barrier layer, and the other surface (inner surface) It may have a structure in which a heat-fusible resin sealant layer is added.

In one specific example, as a material of the metal barrier layer, aluminum having barrier properties against gas and the like and ductility enabling thin film processing may be used. Since the resin outer layer has to have excellent resistance from the external environment, a polymer resin having a tensile strength and weather resistance of a predetermined or higher may be used as a material thereof, such as polyethylene terephthalate (PET) and a stretched nylon film.

In addition, as a material of the resin sealant layer, it has thermal adhesion (thermal adhesion), has low hygroscopicity to suppress the penetration of electrolyte, and is not expanded or eroded by the electrolyte (CPP). system resins and the like may be used.

In general, in the case of a can-type battery case, one or both spaces open for the introduction of the electrode assembly may be sealed by welding while covered with a cover, and in the case of a pouch-type battery case, the outer circumferential surface of the receiving part can be sealed by heat-sealing.

The battery case and the metal can of the laminate sheet may be provided with an accommodating part in which the electrode assembly having a unique structure according to the present invention is built, and the accommodating part has a width corresponding to the shape of the electrode assembly having a unique structure according to the present invention. It may have a shape of a stepped structure having a height and a height.

For example, when the battery case is a battery case of a laminate sheet, the battery case of the laminate sheet may include an upper case and a lower case, and the upper case and the lower case are coupled to each other and stacked in a sealed space. Accommodating parts may be formed to correspond to the stacked outer shape of the electrode assemblies so that the electrode assemblies can be accommodated.

The unit cells 110 , 120 , 130 , 140 , 150 , and 160 may be a lithium ion battery cell or a lithium ion polymer battery cell, but are not limited thereto.

Those of ordinary skill in the sales field to which the present invention belongs will be able to perform various applications and modifications within the scope of the present invention based on the above contents.

Claims (20)

a unit cell stack in which a plurality of unit cells are stacked;
a coverlay electrically connected to the unit cells and bent at least once; and
a battery management system plate including a battery management system electrically connected to the coverlay;
including,
The coverlay includes a battery management system connection part, and the battery management system and the coverlay are electrically connected to each other through the battery management system connection part,
The battery management system connection part further includes a connection terminal formed at an end of the extension part extending in a direction in which the electrode terminal of the unit cell extends from the coverlay,
The connection terminal is bent in an inner direction of the battery pack in a direction in which the extension portion is extended, and is coupled to the battery management system plate. According to claim 1,
A battery pack to which the battery management system connection unit and the battery management system plate are coupled. According to claim 1,
The coverlay includes at least two or more coverlay portions formed in a plate-like shape having a length compared to a width,
The coverlay portion extends in a direction crossing the direction in which the electrode terminals of the unit cells extend. According to claim 1,
The coverlay includes at least one bent part, and the bent part includes a cutout having a relatively reduced width. According to claim 1,
The coverlay includes an electrode terminal connection part and an insulating layer, and the electrode terminal connection part is laminated on the insulating layer. 6. The method of claim 5,
A battery pack in which the unit cells are electrically connected in parallel or in series by the electrode terminal connection part. According to claim 1,
The battery management system connection part is located in the center of the coverlay based on the longitudinal direction of the coverlay battery pack. delete delete delete According to claim 1,
The outermost electrode terminal end portions located on both sides in the longitudinal direction of the coverlay extend in the direction in which the electrode terminal of the unit cell extends and are bent in the inner direction of the battery pack to be coupled to the battery management system plate. 12. The method of claim 11,
The power supply terminal portions located on both sides of the coverlay in the longitudinal direction extend in the direction in which the electrode terminals of the unit cells extend, are bent in the inner direction of the battery pack, and are coupled to the battery management system plate. 13. The method of claim 12,
A battery management system mounting part is formed by the extension part, the outermost electrode terminal end part, and the power supply terminal part, and the battery management system plate is located in the battery management system mounting part. 13. The method of claim 12,
The connection terminal, the outermost electrode terminal end portion, and the power supply terminal portion is a battery pack enclosing a side surface and an upper surface of the battery management system plate. 15. The method of claim 14,
The battery pack further comprising an external connector positioned on the upper surface of the battery management system plate. According to claim 1,
The battery pack further comprising an elastic member interposed between the unit cells. a unit cell stack in which a plurality of unit cells are stacked;
a coverlay electrically connected to the unit cells and bent at least once;
a battery management system plate including a battery management system electrically connected to the coverlay;
and
hard rigid layer;
including,
The coverlay includes a battery management system connection part, and the battery management system and the coverlay are electrically connected to each other through the battery management system connection part,
The battery management system connection part further includes a connection terminal formed at an end of the extension part extending in a direction in which the electrode terminal of the unit cell extends from the coverlay,
The connection terminal is bent in an inner direction of the battery pack in a direction in which the extension portion is extended, and is coupled to the battery management system plate. 18. The method of claim 17,
The outermost electrode terminal end portions located on both sides in the longitudinal direction of the coverlay extend in the direction in which the electrode terminal of the unit cell extends, are bent in the inner direction of the battery pack, and are coupled to the battery management system plate,
Power supply terminal portions located on both sides in the longitudinal direction of the coverlay extend in the direction in which the electrode terminals of the unit cells extend and are bent in the inner direction of the battery pack to be coupled to the battery management system plate,
A battery management system mounting part is formed by the extension part, the outermost electrode terminal end part, and the power supply terminal part, and the battery management system plate is located in the battery management system mounting part,
The connection terminal, the outermost electrode terminal end portion, and the power supply terminal portion is a battery pack enclosing a side surface and an upper surface of the battery management system plate. 19. The method of claim 18,
The battery pack further comprising an external connector positioned on the upper surface of the battery management system plate. A device comprising the battery pack according to claim 1 or 17 as a power source.

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