Title of the invention: battery module, battery pack including such battery module, and automobile 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 a priority claim application for Korean Patent Application No. 10-2018-0116525 filed on September 28, 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 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. The general way to configure the battery pack
[6]
When constructing such a battery module or a battery pack, increasing the efficiency of the assembly process is an important factor in product productivity and price competitiveness. In recent years, as the demand for high-capacity battery cells increases, the demand for battery modules or battery packs is increasing rapidly. Therefore, in order to secure product market competitiveness, the efficiency of the assembly process of such battery modules or battery packs can be improved. A plan is required.
Detailed description of the invention
Technical challenge
[7]
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.
Means of solving the task
[8]
In order to solve the above object, the present invention provides a battery module, comprising: a plurality of battery cells; A base frame supporting the plurality of battery cells; A cover frame coupled to the base frame to cover the plurality of battery cells; And a bus bar unit tiltingly coupled to the cover frame so as to rotate at a predetermined angle between a first position fixed to the cover frame and a second position fixed to the base frame. .
[9]
The bus bar unit may include a bus bar housing rotatably coupled to the cover frame and fixed to the base frame; And a connection bus bar provided in the bus bar housing and connected to electrode leads of the plurality of battery cells.
[10]
The bus bar housing may be provided with a tension stopper that is hooked to the bottom of the cover frame at the first position to separate the bus bar housing from the base frame by a predetermined angle.
[11]
The tension stopper may include a protrusion protruding from the bus bar housing to a predetermined length; A first bent portion bent from the protrusion, in close contact with the bottom surface of the cover frame at the first position, and spaced apart from the bottom surface of the cover frame at the second position; And a second bent portion bent from the first bent portion, spaced apart from the bottom surface of the cover frame at the first position, and disposed in close contact with or adjacent to the bottom surface of the cover frame at the second position. .
[12]
A guide protrusion for guiding the positioning of the bus bar housing at the second position may be formed on the bus bar housing.
[13]
A guide groove into which the guide protrusion is inserted when the bus bar unit is rotated from the first position to the second position may be formed in the cover frame.
[14]
In the busbar housing, a fixing hook for fixing the busbar housing to the base frame at the second position may be formed.
[15]
A hook insertion groove into which the fixing hook is inserted at the second position may be formed in the base frame.
[16]
In addition, the present invention provides a battery pack, comprising: at least one battery module according to the above-described embodiments; And a pack case for packaging the at least one battery module.
[17]
In addition, the present invention provides a vehicle, comprising: at least one battery pack according to the above-described embodiments.
Effects of the Invention
[18]
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.
Brief description of the drawing
[19]
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.
[20]
1 is a view for explaining a battery module according to an embodiment of the present invention.
[21]
2 is an exploded perspective view of the battery module of FIG. 1.
[22]
3 and 4 are views for explaining a combination of a cover frame and a bus bar unit of the battery module of FIG. 2.
[23]
5 is a view for explaining an arrangement of the bus bar unit of FIG. 3 in a first position.
[24]
6 and 7 are views for explaining a tension stopper of the bus bar unit of FIG. 5.
[25]
8 to 10 are views for explaining an arrangement of the bus bar unit of FIG. 3 in a second position.
[26]
11 to 16 are views for explaining an assembly process of the battery module of FIG. 1.
[27]
17 is a diagram for describing a battery pack according to an embodiment of the present invention.
[28]
18 is a view for explaining a vehicle according to an embodiment of the present invention.
Mode for carrying out the invention
[29]
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 variously modified and implemented differently 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.
[30]
1 is a view for explaining a battery module according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the battery module of FIG. 1, and FIGS. 3 and 4 are a cover frame and a bus bar of the battery module of FIG. It is a diagram for explaining the combination of the units, FIG. 5 is a diagram for explaining the arrangement of the bus bar unit of FIG. 3 in the first position, and FIGS. 6 and 7 are diagrams illustrating a tension stopper of the bus bar unit of FIG. It is a figure for explaining, and FIGS. 8 to 10 are diagrams for explaining an arrangement of the bus bar unit of FIG. 3 in a second position.
[31]
1 to 10, the battery module 10 includes a battery cell 100, a base frame 200, a cover frame 300, a front cover 400, a rear cover 450, and a bus bar unit ( 500).
[32]
The battery cell 100 is a secondary battery, and may be 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 a pouch-type secondary battery.
[33]
A plurality of such battery cells 100 may be provided. The plurality of battery cells 100 may be stacked together to be electrically connected to each other. The electrical connection of the plurality of battery cells 100 may be performed through connection between the electrode leads 150 of the plurality of battery cells 100 and a bus bar unit 500 to be described later.
[34]
The base frame 200 is for supporting the plurality of battery cells 100 and may support the bottom of the plurality of battery cells 100. The top surface of the base frame 200 may have a shape corresponding to the bottom surface of the plurality of battery cells 100. Accordingly, the plurality of battery cells 100 may be stably supported on the upper surface of the base frame 200.
[35]
The base frame 200 may include a hook insertion groove 210.
[36]
The hook insertion groove 210 is for stably fixing the bus bar housing 510 of the bus bar unit 500 to be described later to the base frame 200 at a second position to be described later, and the base frame ( 200) may be provided at the front and rear ends.
[37]
The hook insertion groove 210 may be provided in a plurality of at least one or more. Hereinafter, in the present embodiment, a plurality of hook insertion grooves 210 may be provided, and the plurality of hook insertion grooves 210 may be spaced apart from each other by a predetermined distance.
[38]
The cover frame 300 may be coupled to the base frame 200 to cover the plurality of battery cells 100. The cover frame 300 may cover upper and both sides of the plurality of battery cells 100.
[39]
The cover frame 300 and the rotation guide groove 310 may be included.
[40]
The rotation guide groove 310 is provided above both ends and may guide the rotation of the bus bar unit 500 to be described later. A rotation shaft protrusion 530 of the bus bar unit 500 to be described later may be mounted in the rotation guide groove 310.
[41]
The cover frame 300 may include a connector 330.
[42]
The connector 330 is for connecting the battery module 10 to an external power source or other electrical components, and may be provided on a front inner wall of the cover frame 300.
[43]
The cover frame 300 may include a guide groove 350.
[44]
The guide groove 350 may be provided at both side ends of the cover frame 300. In the guide groove 350, when the bus bar unit 500 to be described later rotates from a first position to be described later to a second position to be described later, a guide protrusion 540 to be described later may be inserted.
[45]
The front cover 400 may cover the front of the bus bar unit 500 and may form the front of the battery module 10. The rear cover 450 covers the rear of the bus bar unit 500 and may form a rear surface of the battery module 10.
[46]
The bus bar unit 500 electrically connects the plurality of battery cells 100 and includes a first position fixed to the cover frame 300 at a predetermined angle and a second fixed to the base frame 200. It may be tilted and coupled to the cover frame 300 so as to rotate at a predetermined angle between positions.
[47]
In this embodiment, the first position is a position at which the bus bar housing 510 of the bus bar unit 500 to be described later is fixed from the cover frame 300 at a predetermined angle, and the second position is a bus to be described later. It may mean a position where the bar housing 510 is fixed to the base frame 200.
[48]
Hereinafter, the bus bar unit 500 according to the present embodiment will be described in more detail.
[49]
The bus bar unit 500 may include a bus bar housing 510, a connection bus bar 520, and a rotating shaft protrusion 530.
[50]
The bus bar housing 510 is rotatably coupled to the cover frame 300 and may be fixed to the base frame 200. The busbar housing 510 may cover front and rear of the plurality of battery cells 100.
[51]
The connection bus bar 520 is provided in the bus bar housing 510 and may be connected to the electrode leads 150 of the plurality of battery cells 100. A plurality of connection busbars 520 may be provided and mounted on the busbar housing 510 to be spaced apart from each other by a predetermined distance.
[52]
The rotation shaft protrusion 530 is provided on both upper sides of the bus bar housing 510 and may be rotatably inserted into the rotation guide groove 310 of the cover frame 300.
[53]
The bus bar unit 500 may include a guide protrusion 530.
[54]
The guide protrusion 530 is provided on a side surface of the bus bar housing 510 and may guide the positioning of the bus bar housing 510 at the second position. The guide protrusion 530 may be inserted into the guide groove 350 to guide the assembly of the bus bar housing 510 in position.
[55]
The bus bar unit 500 may include a fixing hook 550.
[56]
The fixing hook 550 is for fixing the bus bar housing 510 to the base frame 200 in the second position, and may be provided at the bottom of the bus bar housing 510.
[57]
The fixing hook 550 may be provided in a plurality of at least one or more.
[58]
The bus bar unit 500 may include a tension stopper 560.
[59]
The tension stopper 560 is provided on the bus bar housing 510 and is caught on the bottom of the cover frame 300 at the first position to move the bus bar housing 510 from the base frame 200. It can be separated by a predetermined angle.
[60]
The tension stopper 560 may include a protrusion 562, a first bent part 564 and a second bent part 566.
[61]
The protrusion 562 is provided on an upper surface of the bus bar housing 510 and may protrude from the upper surface of the bus bar housing 510 to a predetermined length.
[62]
The first bent portion 564 is bent from the protruding portion 562, is in close contact with the bottom surface of the cover frame 300 at the first position, and from the bottom surface of the cover frame 300 at the second position Can be separated.
[63]
The second bent portion 566 is bent from the first bent portion 564, is spaced apart from the bottom surface of the cover frame 300 at the first position, and the cover frame 300 at the second position It can be placed in close contact with or adjacent to the bottom of.
[64]
Hereinafter, a rotation operation of the bus bar unit 500 between the first position and the second position will be described in detail.
[65]
First, in the first position (refer to FIG. 5), the bus bar housing 510 is fixed while being spaced apart from the cover frame 300 at a predetermined angle to open the front and rear sides of the cover frame 300 to a predetermined size. You can keep it.
[66]
Such a fixed arrangement of the busbar housing 510 at a predetermined angle may be possible through the tension stopper 560. As disclosed in FIG. 7, in the first position, the first bent portion 564 of the tension stopper 560 is in close contact with the inner wall of the cover frame 300. Flow can be prevented.
[67]
In this embodiment, since the bus bar housing 510 is fixed at a predetermined angle and disposed without flow at the first position, when assembling the cover frame 300 and the base frame 200, the bus bar It is possible to prevent damage to the electrode leads 150 of the battery cells 100 that may be caused by the flow of the housing 510 or damage to other components.
[68]
Therefore, in this embodiment, when assembling the cover frame 300 and the base frame 200, it is possible to more accurately assemble the cover frame 300 and the base frame 200, so that the inside of the cover frame 300 and the base frame 200 The assembly position of the plurality of battery cells 100 disposed in the battery can be more accurately assembled, and damage to the electric component or electrode lead 150 near the busbar housing 510 that may be caused during this assembly process, etc. Can be effectively prevented.
[69]
After correctly placing the battery cells 100 in the cover frame 300 and the base frame 200, a manufacturer, etc. 8), the bus bar housing 510 may be rotated.
[70]
Thereafter, the manufacturer or the like may electrically connect the connection bus bars 520 of the bus bar unit 500 and the electrode leads 150 of the battery cells 100.
[71]
When the bus bar housing 510 is rotated from the first position to the second position, the guide protrusion 540 is inserted into the guide groove 350 of the cover frame 300 and the bus bar housing ( 510) can be guided.
[72]
When the bus bar housing 510 is rotated from the first position to the second position, the tension stopper 560 is also rotated together, and the first bent portion of the tension stopper 560 ( As 564 is spaced apart from the inner wall of the cover frame 300, the second bent portion 566 may be disposed in contact with or adjacent to the inner wall of the cover frame 300.
[73]
In addition, the fixing hook 550 of the bus bar housing 510 is inserted into the hook insertion groove 210 in the base frame 200 according to the rotation, and the bus bar housing 510 is moved at the second position. Can be fixed.
[74]
On the other hand, the bus bar housing 510 is disposed (see Fig. 6) to form a space S between the connector 330 provided in the cover frame 300 and a predetermined space. The problem of interference with 330 may not occur.
[75]
11 to 16 are views for explaining an assembly process of the battery module of FIG. 1.
[76]
Referring to FIG. 11, first, the manufacturer or the like may stack the plurality of battery cells 100 side by side in a predetermined direction. Referring to FIG. 12, the manufacturer or the like may seat the plurality of battery cells on the base frame 200.
[77]
Referring to FIG. 13, the manufacturer or the like may mount the cover frame 300 on the base frame 200 so as to cover the upper and both sides of the plurality of battery cells 200.
[78]
At this time, since the bus bar unit 500 coupled with the cover frame 300 is fixed at a predetermined angle and disposed without flow, the manufacturer, etc. The cover frame 300 can be smoothly assembled to the base frame 200.
[79]
Referring to FIG. 14, when the assembly of the cover frame 300 and the base frame 200 is completed, the manufacturer or the like rotates the bus bar unit 500 to prevent the battery cells 100 (see FIG. 11 ). The electrode leads 150 may be electrically connected to the bus bar unit 500.
[80]
Referring to FIG. 15, the manufacturer or the like may then mount the front cover 400 and the rear cover 450 to cover the front and rear sides of the busbar unit 500.
[81]
Referring to FIG. 16, when mounting of the front cover 400 and the rear cover 450 is completed, the manufacturer, etc. The rear cover 450 is finally coupled through a welding coupling (S), so that the battery cells 100 (see FIG. 11) and the bus bar unit 500 (see FIG. 15) may be hermetically packaged.
[82]
As such, in the present embodiment, since the assembly process can be performed without interference between constituent parts coupled during the assembly process of the battery module 10, the assembly process efficiency of the battery module 10 can be remarkably improved. .
[83]
17 is a view for explaining a battery pack according to an embodiment of the present invention, and FIG. 18 is a view for explaining a vehicle according to an embodiment of the present invention.
[84]
Referring to FIGS. 17 and 18, 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.
[85]
The battery pack 1 may be provided in the vehicle V as a fuel source for the vehicle V. For 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.
[86]
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.
[87]
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.
[88]
According to various embodiments as described above, the battery module 10 that can increase the assembly process efficiency, the battery pack 1 including the battery module 10, and the battery pack 1 are included. It is possible to provide the vehicle (V).
[89]
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 implemented by those skilled in the art, and these modifications should not be understood individually from the technical spirit or prospect of the present invention.
Claims
[Claim 1]
A battery module, comprising: a plurality of battery cells; A base frame supporting the plurality of battery cells; A cover frame coupled to the base frame to cover the plurality of battery cells; And a bus bar unit tiltingly coupled to the cover frame so as to rotate at a predetermined angle between a first position fixed to the cover frame and a second position fixed to the base frame.
[Claim 2]
The apparatus of claim 1, wherein the bus bar unit comprises: a bus bar housing rotatably coupled to the cover frame and fixed to the base frame; And a connection bus bar provided in the bus bar housing and connected to electrode leads of the plurality of battery cells.
[Claim 3]
The battery module of claim 2, wherein the bus bar housing is provided with a tension stopper that is hooked to a bottom of the cover frame at the first position to separate the bus bar housing from the base frame by a predetermined angle; .
[Claim 4]
The apparatus of claim 3, wherein the tension stopper comprises: a protrusion protruding from the bus bar housing to a predetermined length; A first bent portion bent from the protrusion, in close contact with the bottom surface of the cover frame at the first position, and spaced apart from the bottom surface of the cover frame at the second position; And a second bent portion bent from the first bent portion, spaced apart from the bottom surface of the cover frame at the first position, and disposed in close contact with or adjacent to the bottom surface of the cover frame at the second position. Battery module.
[Claim 5]
The battery module of claim 2, wherein the bus bar housing has a guide protrusion configured to guide the positioning of the bus bar housing at the second position.
[Claim 6]
The battery module of claim 5, wherein the cover frame includes a guide groove into which the guide protrusion is inserted when the bus bar unit is rotated from the first position to the second position.
[Claim 7]
The battery module of claim 2, wherein the bus bar housing is provided with a fixing hook for fixing the bus bar housing to the base frame at the second position.
[Claim 8]
The battery module of claim 7, wherein the base frame has a hook insertion groove into which the fixing hook is inserted at the second position.
[Claim 9]
At least one battery module according to claim 1; And a pack case for packaging the at least one battery module.
[Claim 10]
At least one battery pack according to claim 9; A vehicle comprising a.