Title of the invention: battery cell, battery module including the same, battery rack and power storage device
Technical field
[One]
The present invention relates to a battery cell, a battery module including the same, a battery rack, and a power storage device.
[2]
This application is an application for claiming priority for Korean Patent Application No. 10-2019-0018662 filed on February 18, 2019, and all contents disclosed in the specification and drawings of the application are incorporated herein by reference.
Background
[3]
Rechargeable batteries with high ease of application and high energy density according to product group are not only portable devices, but also electric vehicles (EVs) or hybrid vehicles (HEVs) driven by an electric drive source. It is universally applied. Such a secondary battery is attracting attention as a new energy source for eco-friendly and energy efficiency enhancement in that it does not generate by-products from the use of energy as well as the primary advantage that it can dramatically reduce the use of fossil fuels.
[4]
Currently widely used types of secondary batteries include lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel hydride batteries, and nickel zinc batteries. The operating voltage of such a unit secondary battery cell, that is, a unit battery cell, is about 2.5V to 4.5V. Therefore, when a higher output voltage is required, a battery pack may be configured by connecting a plurality of battery cells in series. In addition, a battery pack may be configured by connecting a plurality of battery cells in parallel according to the charge/discharge capacity required for the battery pack. Accordingly, the number of battery cells included in the battery pack may be variously set according to a required output voltage or charge/discharge capacity.
[5]
Meanwhile, when configuring a battery pack by connecting a plurality of battery cells in series/parallel, a battery module including at least one battery cell is first configured, and other components are added using at least one battery module. It is common to construct a battery pack. Here, a power storage device including battery racks including at least one such battery module may be configured according to various voltage and capacity requirements.
[6]
In the conventional power storage device, when the battery cells constitute a battery module, a battery rack, and a power storage device, after a plurality of cells or a plurality of cells are mounted on separate plurality of cell cartridges, the battery is stacked through a plurality of cell cartridges. Configure modules, battery racks or power storage devices.
[7]
Accordingly, conventionally, when a plurality of battery cells are stacked, a plurality of additional cell cartridges are additionally required, and thus, there is a disadvantage in terms of slimness and energy density due to such a plurality of cell cartridges. In addition, the addition of a plurality of additional cell cartridges has a problem of lowering the overall assembly process efficiency in terms of cost and time.
[8]
Therefore, there is a need for a method for providing a slimmer and more compact battery cell capable of improving assembly process efficiency, a battery module including the same, a battery rack, and a power storage device.
Detailed description of the invention
Technical challenge
[9]
Accordingly, an object of the present invention is to provide a battery cell having a slimmer and compact structure, a battery module including the same, a battery rack, and a power storage device.
[10]
In addition, another object of the present invention is to provide a battery cell capable of improving assembly process efficiency, a battery module including the same, a battery rack, and a power storage device.
[11]
In addition, another object of the present invention is to provide a battery cell capable of securing the fixing and insulating performance of the battery cell with a simpler structure, a battery module including the same, a battery rack, and a power storage device.
Means of solving the task
[12]
In order to solve the above object, the present invention provides a battery cell, comprising: an electrode assembly; A pair of electrode leads electrically connected to the electrode assembly; A battery case for accommodating the pair of electrode leads to protrude at least partially in a front-rear direction of the battery cell and forming an accommodation space for accommodating the electrode assembly; And a taping unit integrally covering both side surfaces and upper and lower surfaces of the battery case.
[13]
The taping unit may include a main tape integrally attached to both side surfaces and upper and lower surfaces of the battery case; And a pair of auxiliary tapes attached to the main tape and disposed to face the upper and lower surfaces of the battery case with the main tape interposed therebetween when the main tape is attached to the battery case.
[14]
A wing folding unit that is folded at least once may be provided on the upper and lower surfaces of the battery case, and the taping unit may be attached to the wing folding unit.
[15]
The taping unit may be attached to at least one of both side surfaces and upper and lower surfaces of the battery case, and then attached to both side surfaces and upper and lower surfaces of the battery case through rotation of at least one of the battery case or the taping unit.
[16]
The main tape may be provided as a double-sided tape.
[17]
The pair of auxiliary tapes may be provided as insulating tapes.
[18]
In addition, the present invention, a battery module, a plurality of battery cells according to the above-described embodiments; And a module case accommodating the plurality of battery cells.
[19]
The plurality of battery cells are mutually stacked so as to face both sides of each battery cell in the module case, and the taping unit is adhered to a taping unit of the facing battery cell when the plurality of battery cells are stacked. It is possible to fix between the plurality of battery cells in the module case.
[20]
In addition, the present invention, as a battery rack, at least one battery module according to the above-described embodiments; And a rack case accommodating the at least one battery module.
[21]
In addition, the present invention provides a power storage device comprising: at least one battery rack according to the above-described embodiment as a power storage device.
Effects of the Invention
[22]
According to various embodiments as described above, a battery cell having a slimmer and compact structure, a battery module including the same, a battery rack, and a power storage device may be provided.
[23]
In addition, according to various embodiments as described above, a battery cell capable of improving assembly process efficiency, a battery module including the same, a battery rack, and a power storage device may be provided.
[24]
In addition, according to various embodiments as described above, a battery cell capable of securing fixing and insulating performance of the battery cell with a simpler structure, a battery module including the same, a battery rack, and a power storage device may be provided.
Brief description of the drawing
[25]
The following drawings appended to the present specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of ​​the present invention together with the detailed description of the present invention, which will be described later. It is limited to and should not be interpreted.
[26]
1 is a view for explaining a battery cell according to an embodiment of the present invention.
[27]
FIG. 2 is a diagram illustrating a taping unit of the battery cell of FIG. 1.
[28]
3 is a front view of the battery cell of FIG. 1.
[29]
4 is an enlarged view of a main part of the battery cell of FIG. 3.
[30]
5 is a view for explaining a wing folding unit according to another embodiment of the battery cell of FIG. 3.
[31]
6 to 10 are views for explaining a process of attaching the taping unit of the battery cell of FIG. 1.
[32]
11 is a view for explaining a battery module according to an embodiment of the present invention.
[33]
12 is a view for explaining a battery rack according to an embodiment of the present invention.
[34]
13 is a diagram illustrating a power storage device according to an embodiment of the present invention.
Mode for carrying out the invention
[35]
The present invention will become more apparent by describing in detail a preferred embodiment of the present invention with reference to the accompanying drawings. The embodiments described herein are illustratively shown to aid understanding of the invention, and it should be understood that the present invention may be implemented with various modifications different from the embodiments described herein. In addition, in order to aid understanding of the invention, the accompanying drawings are not drawn to scale, but dimensions of some components may be shown exaggeratedly.
[36]
1 is a view for explaining a battery cell according to an embodiment of the present invention, FIG. 2 is a view for explaining a taping unit of the battery cell of FIG. 1, and FIG. 3 is a front view of the battery cell of FIG. , FIG. 4 is an enlarged view of a main part of the battery cell of FIG. 3, and FIG. 5 is a view for explaining a wing folding part according to another embodiment of the battery cell of FIG. 3.
[37]
1 to 5, the battery cell 100 is a secondary battery, and may be provided with any one of a pouch-type secondary battery, a prismatic secondary battery, and a cylindrical secondary battery. Hereinafter, in the present embodiment, the battery cell 100 is limited to being provided as a pouch-type secondary battery.
[38]
The battery cell 100 may include an electrode assembly 110, a pair of electrode leads 130, a battery case 150, and a taping unit 170.
[39]
The electrode assembly 110 may include a positive electrode plate, a negative electrode plate, and a separator. Since the electrode assembly 110 is well known, a detailed description will be omitted below.
[40]
The pair of electrode leads 130 are electrically connected to the electrode assembly 110 and may protrude outside one side of the battery case 150 to be described later. The pair of electrode leads 130 may include an anode lead and a cathode lead.
[41]
The battery case 150 accommodates the pair of electrode leads 130 to at least partially protrude in the front-rear direction (see FIG. 1) of the battery cell 100, It is possible to form an accommodation space that can be used.
[42]
Wing folding portions 155 and 157 that are folded at least once may be provided on the upper and lower surfaces of the battery case 150 to increase the slimness, energy density, and sealing power of the battery cell 100. For example, as shown in FIG. 4, the wing folding part 155 may be folded once, or, as shown in FIG. 5, the wing folding part 157 may be provided to be folded twice. .
[43]
The taping unit 170 is for fixing and supporting between adjacent battery cells 100 when a plurality of battery cells 100 are stacked together, and both sides of the battery case 150 (see FIG. 1) The upper and lower surfaces (refer to FIG. 1) can be integrally covered.
[44]
The taping unit 170 may include a main tape 172 and an auxiliary tape 176.
[45]
The main tape 172 may be integrally attached to both side surfaces and upper and lower surfaces of the battery case 150. When the main tape 172 is attached to the upper and lower surfaces of the battery case 150, the main tape 172 may be attached to the wing folding parts 155 and 157 of the battery case 150. The main tape 172 may be provided in a predetermined length to cover both side surfaces and upper and lower surfaces of the battery case 150.
[46]
The main tape 172 may be provided as a double-sided tape for adhesion to adjacent battery cells 100 when the battery case 150 and the plurality of battery cells 100 are stacked together.
[47]
The main tape 172 is attached to at least one of both side surfaces and upper and lower surfaces of the battery case 150 and then rotates at least one of the battery case 150 or the taping unit 170. It can be attached to both sides and upper and lower surfaces of the 150.
[48]
The auxiliary tape 176 may be provided in a pair. The pair of auxiliary tapes 176 are attached to the main tape 172, and when the main tape 172 is attached to the battery case 150, the battery case ( 150) may be disposed opposite to the upper and lower surfaces.
[49]
When configuring the battery module 10 of the plurality of battery cells 100 to be described later, the pair of auxiliary tapes 176 secures insulation between the plurality of battery cells 100 and the module case 200 to be described later. It can be provided with an insulating tape so that it can be done.
[50]
The pair of auxiliary tapes 176 may be disposed to surround the upper and lower surfaces of the battery case 150 when the battery cell 100 is attached to the taping unit 170. Accordingly, the pair of auxiliary tapes 176 may prevent expansion of the battery cell 100 when the battery cell 100 is swelled.
[51]
In addition, the pair of auxiliary tapes 176, when configuring the battery module 10 of the battery cell 100, the electrical components in the vicinity of the wing folding parts 155, 157 of the battery case 150, etc. Since the partition structure is formed between the battery cases 150, it is possible to prevent the cooling performance of the battery cell 100 from deteriorating.
[52]
Hereinafter, the attachment and fixing of the taping unit 170 of the battery cell 100 according to the present embodiment will be described in more detail.
[53]
6 to 10 are views for explaining a process of attaching the taping unit of the battery cell of FIG. 1.
[54]
Referring to FIG. 6, a manufacturer or the like may attach one end of the main tape 172 of the taping unit 170 to one side of the battery case 150 of the battery cell 100.
[55]
Referring to FIG. 7, thereafter, the manufacturer or the like rotates the battery cell 100 by 90 degrees in one direction to transfer the main tape 172 of the taping unit 170 to the battery of the battery cell 100. It can be attached to any one wing folding part 155 side of the case 150. Accordingly, the auxiliary tape 176 of the taping unit 170 may cover the side of any one wing folding part 155 of the battery case 150 of the battery cell 100.
[56]
Referring to FIG. 8, after that, the manufacturer or the like rotates the battery cell 100 again by 90 degrees in the one direction to remove the main tape 172 of the taping unit 170 from the battery cell 100. It may be attached to the other side of the battery case 150.
[57]
Referring to FIG. 9, after that, the manufacturer or the like rotates the battery cell 100 again by 90 degrees in one direction, so that the main tape 172 of the taping unit 170 is applied to the battery cell 100. It may be attached to the side of the other wing folding part 155 of the battery case 150. Accordingly, the auxiliary tape 176 of the taping unit 170 may cover the side of the other wing folding part 155 of the battery case 150 of the battery cell 100.
[58]
Referring to FIG. 10, thereafter, the manufacturer or the like rotates the battery cell 100 again by 90 degrees in the one direction to remove the main tape 172 of the taping unit 170 from the battery cell 100. It may be attached to one side of the battery case 150.
[59]
Through this attachment and fixation, the taping unit 170 is integrated on both sides and top and bottom surfaces of the battery case 100 so as to cover both sides and top and bottom surfaces of the battery cell 100 of the battery cell 100. Can be attached.
[60]
11 is a view for explaining a battery module according to an embodiment of the present invention.
[61]
Referring to FIG. 11, the battery module 10 may include a module case 200 accommodating the plurality of battery cells 100 and the plurality of battery cells 100.
[62]
The plurality of battery cells 100 may be stacked together so as to face both side surfaces of each battery cell 100 in the module case 200. When the plurality of battery cells 100 are stacked, the taping unit 170 is adhered to the taping unit 170 of the battery cell 100 to face the plurality of battery cells 100 so that the plurality of battery cells ( 100) can be fixed between.
[63]
In the present embodiment, when the battery cells 100 are stacked, since they are fixed to each other through the taping unit 170 provided on the battery cells 100, a plurality of separate cell cartridges as in the prior art may be omitted. .
[64]
Accordingly, in the case of the present embodiment, since a plurality of conventional cell cartridges in the module case 200 can secure space as much as the volume occupied in the module case 200, the battery module 10 is slimmed and energy The density can be significantly improved.
[65]
In addition, in the case of the present embodiment, since a plurality of additional cell cartridges are omitted, manufacturing cost or manufacturing time due to the addition of a plurality of additional cell cartridges can be reduced. Can be significantly increased.
[66]
12 is a view for explaining a battery rack according to an embodiment of the present invention.
[67]
Referring to FIG. 12, the battery rack 1 may include a rack case 50 accommodating the at least one battery module 10 and the at least one battery module 10.
[68]
Since the battery rack 1 according to the present embodiment includes the battery cells 100 and the battery module 10 of the previous embodiment, the battery cells 100 and the battery module 10 of the previous embodiment It is possible to implement a battery rack (1) having all of the advantages due to.
[69]
13 is a diagram illustrating a power storage device according to an embodiment of the present invention.
[70]
Referring to FIG. 13, the power storage device E may be used as a household or industrial energy source, and a rack case for accommodating the at least one battery rack 1 and the at least one battery rack 1 ( C) may be included.
[71]
Since the power storage device E according to the present embodiment includes the battery cells 100, the battery module 10, and the battery rack 1 of the previous embodiment, the battery cells 100 of the previous embodiment ), it is possible to implement a power storage device E having all of the advantages due to the battery module 10 and the battery rack 1.
[72]
According to various embodiments as described above, the battery cell 100 having a slimmer and compact structure, the battery module 10 including the same, the battery rack 1 and the power storage device E are provided. can do.
[73]
In addition, according to various embodiments as described above, the battery cell 100 capable of improving the assembly process efficiency, the battery module 10 including the same, the battery rack 1, and the power storage device E ) Can be provided.
[74]
In addition, according to various embodiments as described above, the battery cell 100 capable of securing the fixing and insulating performance of the battery cell 100 with a simpler structure, the battery module 10 including the same, and the A battery rack 1 and the power storage device E may be provided.
[75]
In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and is generally used in the technical field to which the present invention pertains without departing from the gist of the present invention claimed in the claims. Of course, various modifications may be made by those skilled in the art, and these modifications should not be understood individually from the technical idea or prospect of the present invention.
Claims
[Claim 1]
A battery cell, comprising: an electrode assembly; A pair of electrode leads electrically connected to the electrode assembly; A battery case for accommodating the pair of electrode leads to protrude at least partially in a front-rear direction of the battery cell and forming an accommodation space for accommodating the electrode assembly; And a taping unit integrally covering both side surfaces and upper and lower surfaces of the battery case.
[Claim 2]
The method of claim 1, wherein the taping unit comprises: a main tape integrally attached to both side surfaces and upper and lower surfaces of the battery case; And a pair of auxiliary tapes attached to the main tape and disposed to face the upper and lower surfaces of the battery case with the main tape interposed therebetween when the main tape is attached to the battery case.
[Claim 3]
The battery cell of claim 1, wherein a wing folding unit that is folded at least once is provided on the upper and lower surfaces of the battery case, and the taping unit is attached to the wing folding unit.
[Claim 4]
The method of claim 1, wherein the taping unit is attached to at least one of both side surfaces and upper and lower surfaces of the battery case, and then attached to both side surfaces and upper and lower surfaces of the battery case through a rotating operation of at least one of the battery case or the taping unit. Battery cell, characterized in that.
[Claim 5]
The battery cell according to claim 2, wherein the main tape is formed of a double-sided tape.
[Claim 6]
The battery cell according to claim 2, wherein the pair of auxiliary tapes are formed of insulating tapes.
[Claim 7]
A plurality of battery cells according to claim 1; And a module case accommodating the plurality of battery cells.
[Claim 8]
The method of claim 7, wherein the plurality of battery cells are mutually stacked so as to face both sides of each battery cell in the module case, and the taping unit comprises: A battery module, characterized in that it is adhered to a taping unit to fix between the plurality of battery cells within the module case.
[Claim 9]
At least one battery module according to claim 7; And a rack case accommodating the at least one battery module.
[Claim 10]
At least one battery rack according to claim 9; Power storage device comprising a.