Title of invention: battery module, battery pack including such battery module, and vehicle including such battery pack
Technical field
[One]
The present invention relates to a battery module, a battery pack including such a battery module, and a vehicle including such a battery pack.
[2]
This application is an application for claiming priority for Korean Patent Application No. 10-2018-0077300 filed on July 03, 2018, 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 electric drive sources. It is universally applied. Such a secondary battery is attracting attention as a new energy source for environmentally friendly and energy efficiency enhancement in that it does not generate by-products from the use of energy as well as the primary advantage of being able to dramatically reduce the use of fossil fuels.
[4]
Types of rechargeable batteries currently widely used 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.
[6]
In such a conventional battery module, in general, after stacking the cell cartridges by mounting the battery cells on the cell cartridges or after stacking only the battery cells, welding bonding between the electrode lead and the bus bar for electrical connection of the battery cells is not possible. Performed. In conventional welding, the electrode leads facing the stacked battery cells are first bent into a predetermined shape through a bending process and then welded to the bus bar.
[7]
However, in the case of a conventional module assembly process in which such stacking of cell cartridges or welding between the electrode leads of the battery cells and the bus bar after stacking of battery cells is performed, an alignment error occurs when stacking cell cartridges or battery cells There is a problem in that assembling property and weldability between bars and electrode leads are deteriorated.
[8]
In addition, in the case of a conventional battery module, there is a problem in that the overall module assembly process efficiency is deteriorated as the bending process of the electrode leads facing the electrode leads and the busbar must be firstly performed before welding.
Detailed description of the invention
Technical challenge
[9]
Accordingly, an object of the present invention is to provide a battery module capable of increasing assembly process efficiency, a battery pack including the battery module, and a vehicle including the battery pack.
[10]
In addition, another object of the present invention is to provide a battery module capable of improving weldability during welding for an electrical connection between an electrode lead and a bus bar, a battery pack including the battery module, and a vehicle including the battery pack. For.
Means of solving the task
[11]
In order to solve the above object, the present invention provides a battery module, comprising: a plurality of battery cells stacked to be electrically connected to each other; A plurality of cell cartridges covering portions of the plurality of battery cells from which the pair of electrode leads protrude and disposed along the stacking direction of the plurality of battery cells; And a plurality of block bus bars provided on each of the plurality of cell cartridges, electrically connected to each electrode lead, and having a guide coupling protruding along the stacking direction on at least one side thereof. It provides a battery module.
[12]
The plurality of block bus bars may be formed to have a predetermined length along a length direction of the plurality of cell cartridges, and the guide coupling may be provided at one end of the plurality of block bus bars.
[13]
When the plurality of cell cartridges are stacked, the guide coupling may be mutually coupled with a guide coupling of a block bus bar facing in the stacking direction.
[14]
The guide couplings of the plurality of block busbars may include a male coupling protruding toward one side in the stacking direction; And a female coupling protruding to the other side of the stacking direction so as to be coupled to the mail coupling.
[15]
The guide couplings of the plurality of block busbars protrude to both sides in the stacking direction and may further include bi-couplings to be connected to an external power source.
[16]
The bi-coupling may be provided on a block bus bar provided in a cell cartridge disposed at the outermost of the plurality of cell cartridges.
[17]
Each of the plurality of battery cells may include an electrode assembly; A battery case accommodating the electrode assembly; And the pair of electrode leads protruding from both ends of the battery case and electrically connected to the electrode assembly, wherein each of the plurality of cell cartridges includes the battery from which the pair of electrode leads protrude. It can be mounted on both ends of the case.
[18]
The battery case includes: a case body having an accommodation space for accommodating the electrode assembly; And a case terrace extending from both ends of the case body and protruding from the pair of electrode leads, wherein each of the plurality of cell cartridges may support the pair of electrode leads and the case terrace. have.
[19]
An accommodation groove for accommodating the pair of electrode leads and the case terrace may be formed on one surface of the plurality of cell cartridges.
[20]
In the receiving groove, a bus bar seating portion in which each block bus bar is seated may be provided.
[21]
In addition, the present invention, a battery pack, at least one battery module according to the above-described embodiments; And a pack case for packaging the at least one battery module.
[22]
In addition, the present invention provides a vehicle, comprising: at least one battery pack according to the above-described embodiment.
Effects of the Invention
[23]
According to various embodiments as described above, a battery module capable of increasing assembly process efficiency, a battery pack including the battery module, and a vehicle including the battery pack may be provided.
[24]
In addition, according to various embodiments as described above, a battery module capable of improving weldability during welding for an electrical connection between an electrode lead and a bus bar, a battery pack including the battery module, and a vehicle including the battery pack Can provide.
Brief description of the drawing
[25]
The following drawings attached 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 only to and should not be interpreted.
[26]
1 is a view for explaining a battery module according to an embodiment of the present invention.
[27]
2 is a diagram illustrating a battery cell of the battery module of FIG. 1.
[28]
3 is a diagram illustrating a cell cartridge of the battery module of FIG. 1.
[29]
4 to 6 are views for explaining a block bus bar of the battery module of FIG. 1.
[30]
7 to 14 are views for explaining an assembly process of the battery module of FIG. 1.
[31]
15 is a diagram illustrating a battery pack according to an embodiment of the present invention.
[32]
16 is a view for explaining a vehicle according to an embodiment of the present invention.
Mode for carrying out the invention
[33]
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 exaggerated.
[34]
1 is a view for explaining a battery module according to an embodiment of the present invention, Figure 2 is a view for explaining a battery cell of the battery module of Figure 1, Figure 3 is a cell cartridge of the battery module of Figure 1 It is a diagram for explaining, and FIGS. 4 to 6 are diagrams for explaining a block bus bar of the battery module of FIG. 1.
[35]
1 to 6, the battery module 10 may include a battery cell 100, a cell cartridge 300, and a block bus bar 500.
[36]
The battery cell 100 is a secondary battery, and may be provided as a pouch-type secondary battery. Specifically, the battery cell 100 may be a pouch-type lithium polymer battery.
[37]
A plurality of such battery cells 500 may be provided. The plurality of battery cells 500 may be stacked to be electrically connected to each other, and may include an electrode assembly 110, an electrode lead 130, and a battery case 150, respectively.
[38]
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.
[39]
The electrode leads 130 may be provided in a pair, and the pair of electrode leads 130 may be formed of an anode lead and a cathode lead, respectively. The pair of electrode leads 130 are electrically connected to the electrode assembly 110 and protrude from both ends of the battery case 150 to be described later, specifically, both ends of the case terrace 156 to be described later. Can be.
[40]
The battery case 150 may be formed of a laminate sheet including a resin layer and a metal layer, and may accommodate the electrode assembly 110 therein. The battery case 150 may include a case body 152 and a case terrace 156.
[41]
The electrode assembly 110 may be accommodated in the case body 150. To this end, an accommodation space for accommodating the electrode assembly 110 may be provided in the case body 150.
[42]
The case terrace 156 may extend from both ends of the case body 150, and the pair of electrode leads 130 may protrude. The case terrace 150 may be sealed so that the inside of the case body 150 is sealed.
[43]
The cell cartridge 300 may cover a portion of the plurality of battery cells 100 from which the pair of electrode leads 130 protrude. To this end, the cell cartridge 300 may be provided in plurality.
[44]
The plurality of cell cartridges 300 are disposed along the stacking direction of the plurality of battery cells 100 and are mounted on both ends of the battery case 150 from which the pair of electrode leads 130 protrude. I can.
[45]
Specifically, the plurality of cell cartridges 300 may cover a portion of the case terrace 156 of the battery case 150 of the plurality of battery cells 100, and the case terrace 156 Can be mounted on.
[46]
Accordingly, the plurality of cell cartridges 300 may support the pair of electrode leads 130 of the battery cells 100 and the case terrace 156 of the battery case 150, respectively. have.
[47]
To this end, a receiving groove 310 for accommodating the pair of electrode leads 156 and the case terrace 156 may be formed on one surface of the plurality of cell cartridges 300.
[48]
A bus bar seating part 330 may be provided in the receiving groove 310.
[49]
The busbar seating portion 330 may seat and fix each block busbar 500 to be described later, and may include a welding guide groove 332 and a coupling passage groove 335.
[50]
The welding guide groove 332 secures a welding space when welding between the electrode lead 130 of the battery cell 100 and the block bus bar 500 to be described later, so that the cell cartridge 300 according to the welding is performed. ) Can be prevented from being damaged.
[51]
The coupling passage groove 335 may pass through the guide couplings 550, 560, and 570 of the block bus bars 500 to be described later during mutual coupling between the block bus bars 500 to be described later.
[52]
The block bus bar 500 may be provided in plural and provided in each of the plurality of cell cartridges 130, and may be electrically connected to each electrode lead 130 of the plurality of battery cells 100. Preferably, the block busbar 500 may be made of metal.
[53]
The plurality of block bus bars 500 may be formed to have a predetermined length along a length direction of the plurality of cell cartridges 130 (a height direction of the cell cartridge 130 in the drawing). Here, the plurality of block busbars 500 may be formed longer than the electrode leads 130 of the plurality of battery cells 100 in the height direction of the plurality of cell cartridges 130.
[54]
The plurality of block busbars 500 may include guide couplings 550, 560, and 570.
[55]
The guide coupling (550, 560, 570) is provided on at least one side of the plurality of block bus bars (500), the plurality of the plurality of the battery cells 100 and the stacking direction of the cell cartridges 300 The block busbars 500 may be formed to protrude from at least one side.
[56]
Specifically, the guide couplings 550, 560, and 570 may be provided at one end of the plurality of block bus bars 500. When the plurality of cell cartridges 300 are stacked, the guide couplings 550 and 560 may be mutually coupled with the guide couplings 560 and 550 of the block bus bar 500 facing in the stacking direction. .
[57]
Hereinafter, the guide couplings 550, 560, and 570 of the plurality of block busbars 500 will be described in more detail.
[58]
The guide couplings 550, 560, and 570 of the plurality of block busbars 500 may include a mail coupling 550, a female coupling 560, and a bi coupling 570.
[59]
The mail coupling 550 may protrude to any one side in the stacking direction of the block bus bar 500. A coupling guide rib 555 may be formed on the outer surface of the male coupling 550 to increase coupling with the female coupling 560 to be described later.
[60]
The female coupling 560 may protrude to the other side of the block bus bar 500 in the stacking direction so as to be coupled with the mail coupling 550. When the cell cartridges 300 are stacked, the female coupling 560 may be mutually coupled with the mail coupling 550 of the block bus bar 500 provided on the cell cartridge 300 facing each other .
[61]
The bi-coupling 570 is for connection with an external power source, and is provided in the cell cartridge 130 disposed at the outermost of the plurality of cell cartridges 130, and Both sides of the stacking direction may protrude.
[62]
Hereinafter, the assembly process of the battery module 10 according to the present embodiment will be described in more detail.
[63]
7 to 14 are views for explaining an assembly process of the battery module of FIG. 1.
[64]
7 and 8, during the assembly process of the battery module 10, a worker, etc., first, attach the block bus bar 500 to the bus bar seating portion 330 of the cell cartridge 300. Can be installed. Here, the block busbar 500 may be bonded to the busbar mounting portion 330 with an adhesive, tape, or thermal fusion.
[65]
Through this joint mounting, the block bus bar 500 is disposed to cover the welding guide groove 332, and the guide coupling 560 is disposed at a position corresponding to the coupling through hole 335. I can. Although not shown, it goes without saying that the guide couplings 550 and 570 may be disposed at positions corresponding to the coupling through holes 335.
[66]
Referring to FIGS. 9 to 11, the operator or the like may place the battery cell 100 on the cell cartridge 300 on which the block bus bar 500 is mounted. Specifically, one battery cell 100 may be mounted on a pair of cell cartridges 300. More specifically, the case terrace 156 of the battery case 150 of the one battery cell 100 may be mounted on the pair of cell cartridges 300.
[67]
Hereinafter, the operator, etc., the pair of electrode leads 130 of the battery cell 100 protruding outside the case terrace 156 and the block bus bar 500 mounted on the cell cartridges 300, respectively Can be welded together by laser welding or the like.
[68]
In this embodiment, since the welding bonding between the electrode lead 130 of the battery cells 100 and the block bus bar 500 is performed before the stacking of the battery cells 100, the stacking of the battery cells 100 The problem of welding defects due to assembly tolerances, such as defects or incorrect assembly, can be fundamentally prevented.
[69]
In addition, in the case of the present embodiment, since the electrode lead 130 is in a flat state without bending during the welding, the focal length error and the adherend during welding which may occur due to bending of the electrode lead 130 Problems such as occurrence of a gap between the two can be remarkably improved.
[70]
Referring to FIGS. 12 to 14, the operator or the like may stack the battery cells 100 coupled to the block bus bar 500 on each cell cartridge 300 to each other so that they can be electrically connected. Here, the electrical connection may include a direct connection or a parallel connection.
[71]
In this case, the stacking of the battery cells 100 may be performed by combining the block bus bars 500 provided in the cell cartridges 300 with each other. The mutual coupling of the block busbars 500 may be performed through mutual coupling of the guide couplings 550 and 560.
[72]
That is, the guide couplings 550 and 560 according to the present embodiment may guide the stacking assembly of the battery cells 100 and the cell cartridges 300 together with the electrical connection of the battery cells 100. I can.
[73]
In other words, the battery cells 100 and the cell cartridges 300 may be fixed to each other in addition to the electrical connection of the battery cells 100 through mutual coupling of the guide couplings 550 and 560.
[74]
Here, the mutual coupling of the guide couplings 550 and 560 may be achieved through coupling of the mail coupling 550 and the female coupling 560. For example, the male coupling 550 may be press-fitted to the female coupling 560.
[75]
In addition, to minimize contact resistance when the mail coupling 550 and the female coupling 560 are coupled, additionally, between the mail coupling 550 and the female coupling 560 May be filled with a heat conductive adhesive or lubricant.
[76]
As described above, in the present embodiment, electrical connection between the battery cells 100 facing each other during the stacking is made through mutual coupling of the guide couplings 550 and 560. 130) Since the bending process may be omitted, the entire assembly process step of the battery module 10 may be reduced.
[77]
In addition, in the present embodiment, through the guide coupling 570 for connection to an external power source, that is, a bi-coupling 570 provided in the cell cartridge 300 disposed at the outermost side, an external power source, etc. Connection can be planned.
[78]
On the other hand, in this embodiment, the cell cartridges 300 are not all of the battery cells 100 but a part of the battery case 150 of the battery cells 100, that is, a portion near the case terrace 156 Since the bay is covered, it is possible to minimize an increase in volume in the entire battery module 10 due to the cell cartridges 300.
[79]
Accordingly, in the present embodiment, the energy density compared to the same size can be increased, and the battery module 10 which is slimmer and more compact can be provided.
[80]
15 is a view for explaining a battery pack according to an embodiment of the present invention, and FIG. 16 is a view for explaining a vehicle according to an embodiment of the present invention.
[81]
15 and 16, the battery pack 1 includes at least one battery module 10 according to the previous embodiment and a pack case 50 for packaging the at least one battery module 10. I can.
[82]
The at least one battery module may be provided as the battery module 20 of the previous embodiment, or may be provided in plural. It goes without saying that when a plurality of pieces are provided, it may be provided as an assembly of the battery module 10 and the battery module 20 of the previous embodiment.
[83]
The battery pack 1 may be provided in the vehicle V as a fuel source for the vehicle V. By way of example, the battery pack 1 may be provided in the vehicle V in an electric vehicle, a hybrid vehicle, and other ways in which the battery pack 1 can be used as a fuel source.
[84]
In addition, it goes without saying that the battery pack 1 may be provided in other devices, devices, and facilities, such as an energy storage system using a secondary battery in addition to the vehicle V.
[85]
As described above, the battery pack 1 according to the present embodiment and the apparatus, apparatus, and equipment including the battery pack 1 such as the vehicle V include the battery module 10 described above. A battery pack 1 having all of the advantages due to one battery module 10 and a device, apparatus, and equipment such as a vehicle V including the battery pack 1 can be implemented.
[86]
According to various embodiments as described above, the battery module 10 capable of increasing the assembly process efficiency, the battery pack 1 including the battery module 10, and the vehicle V including the battery pack 1 ) Can be provided.
[87]
In addition, according to various embodiments as described above, a battery module 10 capable of improving weldability during welding for electrical connection between the electrode lead 130 and the block bus bar 500, such a battery module 10 It is possible to provide a battery pack 1 including a and a vehicle V including the battery pack 1.
[88]
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 belongs 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 module, comprising: a plurality of battery cells stacked to be electrically connected to each other; A plurality of cell cartridges covering portions of the plurality of battery cells from which the pair of electrode leads protrude and disposed along the stacking direction of the plurality of battery cells; And a plurality of block bus bars provided on each of the plurality of cell cartridges, electrically connected to each electrode lead, and having a guide coupling protruding along the stacking direction on at least one side thereof. Battery module.
[Claim 2]
The method of claim 1, wherein the plurality of block bus bars are formed to have a predetermined length along a length direction of the plurality of cell cartridges, and the guide coupling is provided at one end of the plurality of block bus bars. Battery module.
[Claim 3]
The battery module of claim 2, wherein the guide coupling is mutually coupled with a guide coupling of a block bus bar facing in the stacking direction when the plurality of cell cartridges are stacked.
[Claim 4]
The method of claim 3, wherein the guide couplings of the plurality of block bus bars include: a male coupling protruding toward one side in the stacking direction; And a female coupling protruding to the other side of the stacking direction so as to be coupled to the mail coupling.
[Claim 5]
The battery module of claim 4, wherein the guide couplings of the plurality of block busbars protrude to both sides in the stacking direction and are connected to an external power source.
[Claim 6]
The battery module of claim 5, wherein the bi-coupling is provided in a block bus bar provided in a cell cartridge disposed at an outermost part of the plurality of cell cartridges.
[Claim 7]
According to claim 1, The plurality of battery cells, each, an electrode assembly; A battery case accommodating the electrode assembly; And the pair of electrode leads protruding from both ends of the battery case and electrically connected to the electrode assembly, wherein each of the plurality of cell cartridges includes the battery from which the pair of electrode leads protrude. Battery module, characterized in that mounted on both ends of the case.
[Claim 8]
The apparatus of claim 7, wherein the battery case comprises: a case body provided with an accommodation space for accommodating the electrode assembly; And a case terrace extending from both ends of the case body and protruding from the pair of electrode leads, wherein each of the plurality of cell cartridges supports the pair of electrode leads and the case terrace. Battery module characterized by.
[Claim 9]
The battery module of claim 8, wherein a receiving groove for accommodating the pair of electrode leads and the case terrace is formed on one surface of the plurality of cell cartridges.
[Claim 10]
10. The battery module of claim 9, wherein the receiving groove is provided with a bus bar seating portion in which each block bus bar is seated.
[Claim 11]
At least one battery module according to claim 1; And a pack case for packaging the at least one battery module.
[Claim 12]
At least one battery pack according to claim 11; A vehicle comprising a.