Title of the invention: battery cell assembly, battery module including such battery cell assembly, battery pack including such battery module, and automobile including such battery pack
Technical field
[One]
The present invention relates to a battery cell assembly, a battery module including such a battery cell assembly, 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. 10-2018-0116523 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. It is common to construct a battery pack.
[6]
In the case of a conventional battery module or battery pack, as an assembly of a plurality of battery cells, when configuring a battery module or a battery pack, the assembly configuration type of the plurality of battery cells is also changed according to the model type of the battery module or battery pack.
[7]
Accordingly, in the related art, the shape or shape of an assembly of battery cells for each model of a battery module or battery pack is also different for each product, making it difficult to publicize. Accordingly, in the conventional battery module or battery pack, there is a problem in that the process efficiency is deteriorated due to low product-specific compatibility or expandability when the battery cells are assembled.
[8]
In particular, when the battery cells are cylindrical cells, when the battery cells are assembled with cylindrical cells due to the shape characteristics of the cylindrical cells, the possibility of a dead space occurring between the cylindrical cells for each model type increases. , There is a disadvantageous problem in terms of slimming and energy density.
Detailed description of the invention
Technical challenge
[9]
Accordingly, an object of the present invention is to provide a common battery cell assembly, a battery module including the battery cell assembly, a battery pack including the battery module, and a vehicle including the battery pack.
Means of solving the task
[10]
In order to solve the above object, the present invention provides a battery cell assembly, comprising: a plurality of cylindrical cell blocks including a plurality of cylindrical cells; A block cover covering an upper side of the plurality of cylindrical cell blocks and electrically connecting the plurality of cylindrical cell blocks; A cooling plate disposed opposite the block cover and disposed below the plurality of cylindrical cell blocks; And a heat transfer member disposed between the cooling plate and the plurality of cylindrical cell blocks and including a plurality of thermal interface materials corresponding to the bottoms of the plurality of cylindrical cells. .
[11]
The plurality of cylindrical cell blocks may have a shape corresponding to each other so as to be block-coupled with the adjacent cylindrical cell blocks.
[12]
The plurality of cylindrical cell blocks, each, the plurality of cylindrical cells; A bottom cover accommodating the bottoms of the plurality of cylindrical cells; A top cover coupled to the bottom cover and covering upper portions of the plurality of cylindrical cells; A pair of bus bar members provided on an upper side of the top cover and electrically connecting the plurality of cylindrical cells; And an insulating member provided between the pair of bus bar members.
[13]
Each of the plurality of cylindrical cell blocks may further include at least one heat insulating member for blocking flame propagation to adjacent cylindrical cells when at least one of the plurality of cylindrical cells is ignited.
[14]
The heat insulating member is provided in a plurality, the plurality of heat insulating members, the first heat insulating member covering the side surfaces of the plurality of cylindrical cells; A second heat insulating member covering an upper side of the plurality of cylindrical blood cells and disposed inside the top cover; And a third heat insulating member disposed spaced apart from the second heat insulating member by a predetermined distance and exposed to an upper side of the top cover.
[15]
The at least one heat insulating member may be provided with a mica heat insulating material.
[16]
In addition, the present invention, a battery module, at least one battery cell assembly according to the above-described embodiments; And a module case for packaging the at least one battery cell assembly.
[17]
The module case may include a main cover covering the at least one battery cell assembly; And a front cover coupled to the main cover and covering a front of the at least one battery cell assembly.
[18]
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.
[19]
In addition, the present invention provides a vehicle, comprising: at least one battery pack according to the above-described embodiment.
Effects of the Invention
[20]
According to various embodiments as described above, it is possible to provide a battery cell assembly that can be shared, a battery module including the battery cell assembly, a battery pack including the battery module, and a vehicle including the battery pack.
Brief description of the drawing
[21]
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 to be described later. It is limited to and should not be interpreted.
[22]
1 is a view for explaining a battery cell assembly according to an embodiment of the present invention.
[23]
2 is an exploded perspective view of the battery cell assembly of FIG. 1.
[24]
3 is an enlarged view of part A of the battery cell assembly of FIG. 1.
[25]
4 is an enlarged view of part B of the battery cell assembly of FIG. 1.
[26]
5 is a view for explaining a cylindrical cell block of the battery cell assembly of FIG. 2.
[27]
6 is an exploded perspective view of the cylindrical cell block of FIG. 5.
[28]
7 is a diagram illustrating an assembly structure of the cylindrical cell blocks of FIG. 5.
[29]
8 is a view for explaining a battery module according to an embodiment of the present invention.
[30]
9 is a view for explaining a battery pack according to an embodiment of the present invention.
[31]
10 is a view for explaining a vehicle according to an embodiment of the present invention.
Mode for carrying out the invention
[32]
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 shown exaggeratedly.
[33]
1 is a view for explaining a battery cell assembly according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the battery cell assembly of FIG. 1, and FIG. 3 is an enlarged view of part A of the battery cell assembly of FIG. 1 4 is an enlarged view of part B of the battery cell assembly of FIG. 1, FIG. 5 is a view for explaining a cylindrical cell block of the battery cell assembly of FIG. 2, and FIG. 6 is an exploded view of the cylindrical cell block of FIG. It is a perspective view, and FIG. 7 is a view for explaining an assembly structure of the cylindrical cell blocks of FIG. 5.
[34]
1 to 8, the battery cell assembly 10 may include a cylindrical cell block 100, a block cover 200, a cooling plate 300, and a heat transfer member 400.
[35]
The cylindrical cell block 100 may be provided in plural. The plurality of cylindrical cell blocks 100 may be combined with each other by block. To this end, the plurality of cylindrical cell blocks 100 may have a shape corresponding to each other so as to be block-coupled with the adjacent cylindrical cell blocks 100.
[36]
Specifically, an outer surface of the plurality of cylindrical cell blocks 100 may be provided in an uneven shape corresponding to an outer surface of the cylindrical cell block 100 facing each other. The uneven shape may be provided in a shape in which the convex portion and the concave portion are alternately provided with each other.
[37]
The plurality of cylindrical cell blocks 100 are, respectively, a cylindrical cell 110, a bottom cover 120, a top cover 130, a pair of bus bar members 140 and 150, an insulating member 160 And it may include a heat insulating member (170, 180, 190).
[38]
The cylindrical cell 110 may be provided in plural as a secondary battery. The plurality of cylindrical cells 110 may be stacked together to be electrically connected to each other.
[39]
The bottom cover 120 may have an accommodation space capable of accommodating the bottom portions of the plurality of cylindrical cells 110. The bottom cover 120 may form a part of the outer surface of the cylindrical cell block 100 and may have a concave-convex outer surface for block coupling with the adjacent cylindrical cell block 100.
[40]
The top cover 130 is coupled to the bottom cover 120 and may cover the upper portions of the plurality of cylindrical cells 110. The top cover 130 forms an outer surface of the cylindrical cell block 100 together with the bottom cover 120, and has an uneven outer surface for block coupling with the adjacent cylindrical cell block 100. I can have it.
[41]
A plurality of hooks 135 for more stably fixing the block cover 200 to be described later may be provided on the top cover 130. The block cover 200 to be described later through the plurality of hooks 135 may be stably fixed without being separated from the top cover 130.
[42]
The pair of bus bar members 140 and 150 may be provided on the upper side of the top cover 130. The pair of bus bar members 140 and 150 may electrically connect the plurality of cylindrical cells 110.
[43]
The pair of bus bar members 140 and 150 may include an anode bus bar 140 and a cathode bus bar 150.
[44]
The anode bus bar 140 is electrically connected to the anode of the plurality of cylindrical cells 110 and may be disposed between an insulating member 160 to be described later and an insulating member 190 to be described later.
[45]
The cathode bus bar 150 is electrically connected to the cathode of the plurality of cylindrical cells 110 and may be disposed between the top cover 130 and an insulating member 160 to be described later.
[46]
The insulating member 160 may be provided between the pair of bus bar members 140 and 150, that is, between the anode bus bar 140 and the cathode bus bar 150. The insulating member 160 may prevent direct contact that may occur between the positive busbar 140 and the negative busbar 150.
[47]
The heat insulating member 170, 180, 190 is for blocking flame propagation to the adjacent cylindrical cells 110 when at least one of the plurality of cylindrical cells 110 is ignited, and is provided in at least one or more plurality Can be.
[48]
Hereinafter, in the present embodiment, a description will be made limited to that the heat insulating members 170, 180, and 190 are provided in plural.
[49]
The plurality of heat insulating members 170, 180, 190 may be provided with mica insulating material, and may include a first insulating member 170, a second insulating member 180, and a third insulating member 190. .
[50]
The first heat insulating member 170 may cover side surfaces of the plurality of cylindrical cells 110. When at least one of the plurality of cylindrical cells 110 is ignited, the first heat insulating member 170 may preferentially block flame propagation to the adjacent cylindrical cells 110.
[51]
The second heat insulating member 180 covers the upper side of the plurality of cylindrical blood cells 110 and may be disposed inside the top cover 130. When at least one of the plurality of cylindrical cells 110 is ignited, the second heat insulating member 180 secondly blocks flame propagation and prevents propagation of the flame toward the bus bar member 150. Can be blocked.
[52]
The third heat insulating member 190 is disposed to be spaced apart from the second heat insulating member 180 by a predetermined distance, and may be exposed on the upper side of the top cover 130. When at least one of the plurality of cylindrical cells 110 is ignited, the third heat insulating member 190 finally blocks flame propagation and prevents propagation of the flame toward the block cover 200 to be described later. Can be blocked.
[53]
In this embodiment, through the plurality of heat insulating members 170, 180, 190 provided with the third heat insulating member 190, the second heat insulating member 180, and the first heat insulating member 170, the plurality of Even if ignition occurs in at least one of the cylindrical cells 110, it is possible to effectively prevent a chain of ignition that may lead to the entire cylindrical cells 110.
[54]
The block cover 200 may cover an upper side of the plurality of cylindrical cell blocks 100 and electrically connect the plurality of cylindrical cell blocks 100. The block cover 200 may be fixed through the plurality of hooks 135.
[55]
A cell block welding part 205 for electrically connecting adjacent cylindrical cell blocks 100 may be provided on the block cover 200. Cylindrical cell blocks 100 adjacent to each other through the cell block welding part 205 may be electrically connected to each other through laser welding or the like.
[56]
The cooling plate 300 is for cooling the plurality of cylindrical cells 110, is disposed opposite to the block cover 200, and may be disposed under the plurality of cylindrical cell blocks 110.
[57]
The heat transfer member 400 is disposed between the cooling plate 300 and the plurality of cylindrical cell blocks 110, and a plurality of thermal interface materials 450 corresponding to the bottoms of the plurality of cylindrical cells 110 Can be provided.
[58]
The plurality of thermal interface materials 450 may directly contact the bottoms of the plurality of cylindrical blood cells 110. Heat generated from the plurality of cylindrical cell blocks 110 through the plurality of thermal interface materials 450 may be transferred to the cooling plate 300 more quickly.
[59]
In the present embodiment, the plurality of cylindrical cells 110 may be cooled through the heat transfer member 400 including the plurality of thermal interface materials 450 and the cooling plate 300.
[60]
8 is a view for explaining a battery module according to an embodiment of the present invention.
[61]
Referring to FIG. 8, the battery module 1 may include the battery cell assembly 10 and the module case 50.
[62]
At least one or a plurality of battery cell assemblies 10 may be provided. Hereinafter, in the present embodiment, the battery cell assembly 10 will be described only as being provided in plural.
[63]
The outer surfaces of the plurality of battery cell assemblies 10 may have a shape corresponding to the adjacent battery cell assembly 10. Accordingly, the plurality of battery cell assemblies 10 may be connected to each other through mutual block coupling.
[64]
The module case 50 may package the at least one, and in the present embodiment, the plurality of battery cell assemblies 10.
[65]
The module case 50 may include a main cover 52 and a front cover 56.
[66]
The main cover 52 may cover the at least one, in the present embodiment, the plurality of battery cell assemblies 10. The main cover 52 may have a shape corresponding to an outer surface of the plurality of battery cell assemblies 10.
[67]
The front cover 56 is coupled to the main cover 52 and may cover the at least one, in the case of the present embodiment, a front of the plurality of battery cell assemblies 10. The front 56 may be connected to the main cover 52 through bolting and welding.
[68]
As such, the battery module 10 according to the present embodiment constitutes the battery cell assembly 10 through block coupling between the plurality of cylindrical cell blocks 100, and the plurality of battery cell assemblies 10 Since the battery module 10 can be configured through block coupling between ), the cylindrical cell block 100 can be used as a unit even in various model types. Accordingly, in the present embodiment, the compatibility or expandability of the battery module 10 for each product may be improved.
[69]
In addition, in the battery module 10 according to the present embodiment, since the plurality of cylindrical cell blocks 100 and the plurality of battery cell assemblies 10 are combined through block coupling, the battery module 10 It is possible to secure easy and simple assembleability when manufacturing Accordingly, in this embodiment, the manufacturing process efficiency of the battery module 10 may be remarkably improved.
[70]
In addition, in the battery module 10 according to the present embodiment, since the plurality of cylindrical cell blocks 100 and the plurality of battery cell assemblies 10 are coupled through block coupling, the cylindrical cells 110 The dead space that can occur between) can be minimized. Accordingly, in this embodiment, it is possible to provide the battery module 10 which is slimmer and more compact and has a high energy density.
[71]
9 is a view for explaining a battery pack according to an embodiment of the present invention, Figure 10 is a view for explaining a vehicle according to an embodiment of the present invention.
[72]
9 and 10, the battery pack P includes at least one battery module 1 according to the previous embodiment and a pack case 5 for packaging the at least one battery module 1 I can.
[73]
The battery pack P may be provided in the vehicle V as a fuel source for the vehicle V. For example, the battery pack P may be provided in the vehicle V in an electric vehicle, a hybrid vehicle, and other methods in which the battery pack P can be used as a fuel source.
[74]
In addition, the battery pack P may also be provided in other devices, devices, and facilities, such as an energy storage system using a secondary battery, in addition to the vehicle V.
[75]
As such, the battery pack P and the apparatus, apparatus, and equipment including the battery pack P such as the vehicle V according to the present embodiment include the battery module 1 described above. A battery pack (P) having all of the advantages of one battery module (1) and a device, apparatus, and equipment such as a vehicle (V) including the battery pack (P) can be implemented.
[76]
According to various embodiments as described above, the battery cell assembly 10 which can be shared, the battery module 1 including the battery cell assembly 10, and the battery module 1 including the battery module 1 A battery pack P and the vehicle V including the battery pack P may be provided.
[77]
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 assembly, comprising: a plurality of cylindrical cell blocks including a plurality of cylindrical cells; A block cover covering an upper side of the plurality of cylindrical cell blocks and electrically connecting the plurality of cylindrical cell blocks; A cooling plate disposed opposite the block cover and disposed below the plurality of cylindrical cell blocks; And a heat transfer member disposed between the cooling plate and the plurality of cylindrical cell blocks and including a plurality of thermal interface materials to correspond to bottoms of the plurality of cylindrical cells.
[Claim 2]
The battery cell assembly of claim 1, wherein the plurality of cylindrical cell blocks have a shape corresponding to each other so as to be block-coupled with the adjacent cylindrical cell blocks.
[Claim 3]
According to claim 2, wherein the plurality of cylindrical cell blocks, each, the plurality of cylindrical cells; A bottom cover accommodating the bottoms of the plurality of cylindrical cells; A top cover coupled to the bottom cover and covering upper portions of the plurality of cylindrical cells; A pair of bus bar members provided on an upper side of the top cover and electrically connecting the plurality of cylindrical cells; And an insulating member provided between the pair of bus bar members.
[Claim 4]
The method of claim 3, wherein each of the plurality of cylindrical cell blocks further comprises at least one heat insulating member configured to block flame propagation to adjacent cylindrical cells when at least one of the plurality of cylindrical cells is ignited. Battery cell assembly, characterized in that.
[Claim 5]
According to claim 4, wherein the heat insulating member is provided in a plurality, the plurality of heat insulating members, a first heat insulating member covering the side surfaces of the plurality of cylindrical cells; A second heat insulating member covering an upper side of the plurality of cylindrical blood cells and disposed inside the top cover; And a third heat insulating member disposed spaced apart from the second heat insulating member by a predetermined distance and exposed to an upper side of the top cover.
[Claim 6]
The battery cell assembly of claim 4, wherein the at least one heat insulating member is made of mica heat insulating material.
[Claim 7]
At least one battery cell assembly according to claim 1; And a module case for packaging the at least one battery cell assembly.
[Claim 8]
The apparatus of claim 7, wherein the module case comprises: a main cover covering the at least one battery cell assembly; And a front cover coupled to the main cover and covering a front of the at least one battery cell assembly.
[Claim 9]
At least one battery module according to claim 7; And a pack case for packaging the at least one battery module.
[Claim 10]
A vehicle comprising a; at least one battery pack according to claim 9.