Art
[1]
This application claims priority to an application for the Korea Patent Application No. 10-2017-0036034, filed on March 22, 2017 date, all information disclosed in the specification and drawings of that application is hereby incorporated by reference into this application.
[2]
The present invention relates to a battery pack, to a battery pack that can more specifically to improve the energy density.
BACKGROUND
[3]
Technology and the secondary battery demand as an energy source that has been rapidly increased as the demand increases, but the nickel-cadmium battery or a hydrogen ion battery is used as a conventional secondary battery, in recent years, the memory effect as compared to a secondary battery of nickel based on the mobile device there is free and the charge and discharge hardly occurs, self-discharge rate is very low widely used in the lithium secondary battery is a high energy density.
[4]
The lithium secondary battery mainly uses a lithium-based oxide and carbon materials as an anode active material and the negative active material. The lithium secondary battery is provided with such a positive electrode active material and the negative electrode active material are respectively coated with the positive electrode plate and the negative electrode plate with a separator disposed between the electrode assembly and the casing for sealing the housing with the electrode assembly and an electrolyte, that is, the battery case.
[5]
The lithium secondary battery has a positive electrode, a negative electrode and composed of a separator and an electrolyte interposed between them, a lithium ion battery depending on which to use the positive electrode active material and the negative active material (Lithium Ion Battery, LIB), a lithium polymer battery (Polymer Lithium Ion Battery divided into, PLIB) and the like. Typically, the electrodes of the lithium secondary battery may be formed by after coating aluminum or copper sheet (sheet), mesh (mesh), the film (film), the foil (foil), such as positive or negative electrode active material on collector dried .
[6]
In recent years, the increase in the amount of the energy storage device, such as a battery pack that is used for these automobile while an increasing demand of the hybrid vehicle or electric vehicle. Accordingly, a situation is arranged in an underfloor, such as a hybrid vehicle or an electric vehicle (Under Floor) necessary to develop a battery pack that has a high energy density.
Detailed Description of the Invention
SUMMARY
[7]
Accordingly, the object of the present invention is increasing the space utilization is to provide a battery pack, a relatively high energy density.
[8]
Further, to provide a battery pack that can be easily disposed in the under-floor, such as a hybrid vehicle or an electric vehicle (Under Floor).
Problem solving means
[9]
According to an aspect of the invention, a plurality of battery cells are stacked and a battery module which is provided with a casing member surrounding the plurality of battery cells; And it can be provided with a battery pack including a plurality of connecting members for interconnecting the battery module.
[10]
Further, the plurality of battery modules connected by the connecting member can be arranged in a single layer.
[11]
In addition, the plurality of battery modules may be arranged so as to have at least one row or at least one column.
[12]
Further, the casing member, the upper casing is placed on top of the battery cell; And arranged on the side of said battery cell includes a side housing coupled to the upper casing, at least one of the side casing is formed with an aperture of predetermined size, the connecting member will be coupled to the opening of the side casing can.
[13]
In addition, the connecting member includes a first insertion portion that is inserted into the opening formed on the side of the casing of any one of the battery modules of the plurality of battery modules; And it may include a second insertion portion that is inserted into the other of the openings formed in the casing side surface of the battery module of the plurality of battery modules.
[14]
In addition, the connecting member, the first insert portion and the second insertion portion may further include a stopper that is formed between the first insertion portion and the second insertion portion in order to prevent the insert beyond the predetermined range have.
[15]
In addition, the stopper may be formed so as to extend from between the first insertion portion and the second insertion portion formed toward the direction crossing the direction of the first insertion portion and the second insertion portion.
[16]
In addition, the connecting member may be fixed to the side of the casing through a coupling structure, or a hook coupling structure by screws.
[17]
According to another aspect of the invention, the automobile comprises the above-mentioned battery pack may be provided.
Effects of the Invention
[18]
Embodiments of the present invention, increasing the space utilization, there is an effect that can be relatively improved energy density.
[19]
In addition, there is an effect plurality of battery modules are arranged in a single layer can easily be arranged in an underfloor, such as a hybrid vehicle or an electric vehicle (Under Floor).
Brief Description of the Drawings
[20]
1 is a schematic perspective view of a battery pack according to a first embodiment of the present invention.
[21]
Figure 2 is an exploded perspective view of the battery module in the battery pack according to a first embodiment of the present invention.
[22]
Figure 3 is a separate perspective view of the connecting member and the battery modules in the battery pack according to a first embodiment of the present invention.
[23]
Figure 4 is an enlarged perspective view of A portion in Fig.
[24]
Figure 5 is a partial cross-sectional view of a state, the battery modules are connected by a connecting member in the battery pack according to a first embodiment of the present invention.
[25]
6 is a perspective view of the appearance, the battery modules are connected by a connecting member in the battery pack according to a first embodiment of the present invention.
[26]
Figure 7 is a separate perspective view of the connecting member and the battery modules in the battery pack according to a second embodiment of the present invention.
[27]
Figure 8 is an enlarged perspective view of portion B of FIG.
[28]
Figure 9 is a partial cross-sectional view of a state, the battery modules are connected by a connecting member in the battery pack according to a second embodiment of the present invention.
[29]
10 is an exploded perspective view of the connecting member and the battery modules in the battery pack according to the third embodiment of the present invention.
[30]
Figure 11 is an enlarged perspective view of portion C of Figure 10;
[31]
Figure 12 is a partial cross-sectional view of a state, the battery modules are connected by a connecting member in the battery pack according to the third embodiment of the present invention.
Mode for the Invention
[32]
With reference to the accompanying drawings, it will be described in detail according to a preferred embodiment of the present invention. Herein and in the terms or words used in the claims is general and not be construed as limited to the dictionary meanings are not, the inventor can adequately define terms to describe his own invention in the best way on the basis of the principle that the interpreted based on the meanings and concepts corresponding to technical aspects of the present invention. Accordingly, the configuration shown in the examples and figures disclosed herein are in not intended to limit the scope of the present is merely a preferable embodiment of the present invention invention, a variety that can be made thereto according to the present application point It should be understood that there are equivalents and modifications.
[33]
Size of the particular portion to be combined with each component or components in the drawings are exaggerated, omitted for the purpose of convenience or clarity, or was schematically illustrated. Therefore, the size of elements does not utterly reflect an actual size. If a detailed description of known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention, such explanation will be omitted.
[34]
The term "coupled" or "connected" as used herein, is one member and the other members directly bonded, or a single member, as well as when directly connected or via a joint member indirectly coupled to another element or indirectly to also include the case that is connected.
[35]
Figure 1 is a perspective view of a battery pack according to a first embodiment of the present invention, Figure 2 is a first embodiment of an exploded perspective view of a battery module in a battery pack according to a first embodiment of the present invention, Figure 3 is the invention and the separation of the connecting member and the battery modules in the battery pack is a perspective view according to the Figure 4 by the connection members the battery module in the battery pack according to a first embodiment of an enlarged perspective view, the Fig. 5 the invention of the a portion of Fig. 3 a partial cross-sectional view of the connected state, Figure 6 is a perspective view of the appearance, the battery modules are connected by a connecting member in the battery pack according to a first embodiment of the present invention.
[36]
When 1 to 6, the battery pack 10 according to the first embodiment of the present invention, a battery module 100 and the connection member 200. 1, the battery pack 10 may be mutually connected to a plurality of battery modules 100, for example of a type that is coupled to the plate 400.
[37]
The battery module 100 may Referring to Figure 2, having a plurality of battery cells 110, a casing member 120.
[38]
A plurality of battery cells 110 may be stacked together in various forms. For example, plastic injection and the battery cell 110 housed in the cartridge assembly forming a plurality of cartridge assemblies can be stacked on one another. However, the lamination method of the plurality of battery cells 110 may be varied without being limited thereto.
[39]
Casing member 120 may be configured so as to surround the plurality of battery cells (110). Casing member 120 may be variously configured, for example, is arranged on the side of the upper casing 121, the battery cells 110, which is placed on top of the battery cells 110 coupled to the upper casing 121 which has to be provided with the side casing 122. Wherein each casing can be joined by various methods, such as screws, welding, rivets, bolts, pins, or brackets moment laminating method. 2, the side casing 122 and an opening 126 of a predetermined size can be formed, which will be described later connection member 200 is coupled to the opening 126 of the side casing 122, a plurality of batteries the modules 100 may be interconnected. On the other hand, is disposed in the lower portion of the battery cells 110 may further include a lower casing coupled to the side casing 122.
[40]
Connecting member 200 is configured to interconnect a plurality of battery modules 100. 3 to Referring to Figure 5, the connecting member 200 includes a first insert to be inserted into the opening 126 formed in one of the side casing (122a) of the battery module (100a) of the plurality of battery modules 100 may comprise a portion 210, a plurality of battery modules, the second insertion portion 220 is inserted into the opening 126 formed in the other of the side casing (122c) of the battery module (100b), (100) . A first insertion unit 210, a plurality of battery modules (100) of any one of the battery modules (100a) of the side of the casing screws (300) after the insertion in an opening 126 formed in (122a), or bolts and nuts, etc. and fastening a fastening member of the second insertion portion 220, a plurality of battery modules 100 of the insert after the screw (300 in another one of the openings 126 formed in the side casing (122c) of the battery module (100b) ), or bolts and can be fastened in a fastening member such as a nut. Here, the opening 126 can be presented to the length of the first insertion portion 210 or the second insertion unit 220, for example identically formed.
[41]
3 and 6, the connecting member 200, a plurality of battery modules (100a, 100b) of each of the battery modules that are connected to the side of the casing (122a, 122c) adjacent (100a, 100b) of the interconnection and, thereby to enable the simple assembly it is not required, such as a frame for supporting the battery modules 100 so as well as a reduction material and processing costs the frame is occupied by the space required in close contact than the battery module 100 by state it is possible to configure to the effect that the energy density of the battery pack 10 is improved. Here, the side casing 122 may be provided in a thickness that can have a sufficient rigidity so as well as to protect the battery cells 110 of the structural support features of the battery module 100
[42]
The connecting member 200 may be coupled to the side casing 122 of the battery module 100 is fixed in a number of ways. For example, it can be coupled by bolts and nuts or by means of screws 300, or can be easily engaged by the hook manner. Alternatively, the connecting member 200 may be coupled by welding to the side casing 122.
[43]
1 and 3, a plurality of battery module, is connected by a plurality of battery modules 100 is connected to member 200, 100 can be arranged in a single layer, a plurality of battery modules ( 100) can be arranged to have at least one row or at least one column. In this way, when a plurality of battery modules 100 are arranged in a single layer since the battery module 100, the overall height lower than the case arranged in a plurality of layers, the height, such as under-floor of the electric car limited It can be easily placed in the space.
[44]
Hereinafter, a description will be given of action and effect of the battery pack 10 according to the first embodiment of the present invention.
[45]
3, the battery module 100 is an opening 126, and a side casing 122 may be provided are formed, the connection member 200 includes a battery adjacent to each other of the plurality of battery modules (100a, 100b) after the insertion in the module openings 126 formed on each side of the casing (122a, 122c) of the (100a, 100b) it is coupled through a screw 300 or the like. In this way a plurality of battery modules (100a, 100b) can be connected to each other without a frame, so can the frame is further arranged a battery module 100 in the space occupied, whereby an effect of improving the energy density.
[46]
Figure 7 is an exploded perspective view of the connecting member and the battery modules in the battery pack according to a second embodiment of the present invention, and Figure 8 is an enlarged perspective view of portion B of Figure 7, Figure 9 is according to a second embodiment of the present invention in the battery pack, a partial cross-sectional view of a state, the battery modules are connected by a connecting member.
[47]
But below with reference to the accompanying drawings describe the action and effect of the battery pack 10 according to the second embodiment of the present invention, the content and the common part is described in the battery pack 10 according to the first embodiment of the present invention It is replaced by the foregoing description.
[48]
If the second embodiment of the present invention is different from the first embodiment in that a stopper (240) to the connecting member 200 is formed.
[49]
7 and 8, and the stopper 240 of the first insertion portion 210 and the second insertion portion 220 of the first insertion portion 210 to prevent the insertion in excess of the given range the 2 may be formed between the insertion portion 220. the And, one of the side casing (122a), and one side is disposed in the neighborhood from the casing (122a) so that between the other side of the casing (122b) in contact with one side of the casing (122a), the stopper 240 can be seated step It may be formed (refer to a portion of FIG. 8). That is, the stopper 240 may be secured to the step (a) formed between the side of the casing (122a, 122b) in contact with each other, whereby a plurality of battery modules by the (100) connected to each other by the connection member 200 If it is not separated from the contact state can be combined into (in FIG. 9, the contact 122b and 122d) (see Fig. 9).
[50]
7 when to 9, the stopper 240 has a first insertion portion 210 and the second insertion portion direction crossing the direction (220) is formed, for example, the first insertion portion 210 and the second insert 220 may be formed extending toward the direction perpendicular to the direction. Then, the stopper 240 has a first insertion portion 210 and the second between the insertion portion 220, for example, the first central part (230, Fig. 3 of the insertion portion 210 and the second insertion portion 220 reference may be formed so as to extend from). However, the extension direction and an extended position of the stopper 240 may vary.
[51]
Figure 10 is an exploded perspective view of the connecting member and the battery modules in the battery pack according to the third embodiment of the present invention, and Figure 11 is an enlarged perspective view of a C part in Fig. 10, Fig. 12 according to the third embodiment of the present invention in the battery pack, a partial cross-sectional view of a state, the battery modules are connected by a connecting member.
[52]
Below with reference to the drawings, but describes the operation and effects of the battery pack 10 according to the third embodiment of the present invention, described in the battery pack 10 according to the first embodiment or the second embodiment of the present invention information and the common portion is replaced by the foregoing description.
[53]
When the third embodiment of the present invention is different from the second embodiment in that the battery module between the adjacent by the stopper 240 is formed in the connection member 200 (100) spaced apart.
[54]
When 10 to 12, the stopper 240 of the second embodiment, but common to the example, in the case of the third embodiment, unlike the second embodiment, one side of the casing (122a) and a side casing (122a) are disposed from the neighbor is not the level difference between the other side of the casing (122b) in contact with one side of the casing (122a) is formed (see portion b in Fig. 11). Therefore, when the connection member 200 is coupled to the plurality of battery modules 100 are spaced between the battery modules adjacent to each other (100). That is, the (x, see Fig. 12) the gap of the predetermined distance between the battery modules are interconnected (100) is present. Spaced between these battery modules 100, that is, while the air moving through the gap (x) it is possible to cool the battery modules 100. That is, spaced by a gap (x) between the battery modules 100 is a space formed for the heat radiation of the battery modules 100.
[55]
Meanwhile, the vehicle (not shown) in accordance with one embodiment of the present invention may include the above-described battery pack 10. The battery pack 10 may be disposed or the like may be used a variety of machines or devices using electricity, such as an electric vehicle, in particular an underfloor of the electric vehicle (Under Floor). Here, the electric vehicle may be not only a pure electric vehicle that is driven only to an electric furnace comprising a hybrid vehicle that uses a different energy and electrical energy together.
[56]
The present invention in the above Although the detailed description and specific examples, the invention is not limited by this is described below with the teachings of the present invention by one of ordinary skill in the art available are various changes and modifications within the equivalent scope of the claims. FIG.
Industrial Applicability
[57]
The invention is applicable to industries related to, in particular, secondary batteries relates to a battery pack.

Claims
[Claim 1]
And a plurality of battery cells are stacked, the battery module having a plurality of the casing member surrounding the battery cell; And a battery pack including a plurality of connecting members for interconnecting the battery module.
[Claim 2]
The method of claim 1, wherein the plurality of battery modules connected by the connecting members have a battery pack, characterized in that arranged in a single layer.
[Claim 3]
The method of claim 2, wherein the plurality of battery modules of the battery pack being arranged to have at least one row or at least one column.
[Claim 4]
The method of claim 1 wherein the casing member, the upper casing is placed on top of the battery cell; And arranged on the side of said battery cell includes a side housing coupled to the upper casing, at least one of the side casing is formed with an aperture of predetermined size, the connecting member is coupled to the opening of the side casing the battery pack of claim.
[Claim 5]
The method of claim 4, wherein the connecting member includes a first insertion portion that is inserted into the opening formed on the side of the casing of any one of the battery modules of the plurality of battery modules; And a battery pack comprising: a plurality of battery modules, and one of the second insert to be inserted into the opening formed on the side of the casing of the battery module of the unit.
[Claim 6]
The method of claim 5, wherein the connecting member, the stopper is formed between the first insertion portion and the second insertion portion in order to prevent addition of the first insertion portion and the second insert to be inserted beyond the predetermined range the battery pack further comprises.
[Claim 7]
The method of claim 6, wherein the stopper includes a battery, characterized in that is formed so as to extend from between the first insertion portion and the second insertion portion toward the formed direction crossing the direction of the first insertion portion and the second insertion portion pack.
[Claim 8]
The method of claim 4, wherein said connecting member is a battery pack, characterized in that through the combined structure, or the hook coupling structure according to the screw fixed to the casing side.
[Claim 9]
First car comprising a battery pack according to any one of the preceding claims.