Art
[1]This application claims priority to an application for the Korea Patent Application No. 10-2017-0127475, filed on September 29, 2017, 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 module and a battery pack including the same, and more particularly, to a battery pack including the battery module, and it can be combined with a bus bar without bending the electrode lead.
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, the lithium secondary 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 these lithium secondary batteries is formed by after coating aluminum or copper sheet (sheet), mesh (mesh), the film (film), the foil (foil) to the positive or negative electrode active material of the current collector, such as drying.
[6]
Figure 1 is a prior art electrode leads and the bus bar is electrically coupled to the figure provided in the battery cell. 1, the case of the prior art, the bending of the electrode lead (20) each having a plurality of battery cells 10 were attached via welding (40) was in contact with the side bus bar 30, the If the electrodes are a plurality of manually by the operator to maintain the bent shape of the leads 20 is required, the electrode lead 20 by the elastic recovery force of the electrode lead 20 of the metal material and the bus bar 30 is in close contact does not, there is also a one, because of the welding 40, and then superimposed at a point is the concentration of heat at the top of the electrode lead 20, a problem that the deterioration of the weldability, a plurality of electrode leads 20 to the bus bar (30).
Detailed Description of the Invention
SUMMARY
[7]
Accordingly, the object of the present invention is to combine the bus bar without bending the electrode leads provide a battery pack that contains the electrode leads and the battery module is possible adhesion of the bus bar and it.
[8]
In addition, the heat generated during welding to provide a battery pack including the battery module, and it can be uniformly distributed in all the electrode lead improves the weldability.
[9]
In addition, the manual process for the bending of the electrode lead is removed to provide a battery pack containing that may improve automated production line rate of the battery modules, and this.
Problem solving means
[10]
Accordingly, the object of the present invention, the battery cell stack in which a plurality of battery cells are stacked; And to the bus bar to provide a battery module, it characterized in that the bus bar and the electrode leads are electrically connected to the pressing of the electrode lead, comprising: a bar bus electrode lead respectively provided are coupled to the battery cells of the plurality .
[11]
In addition, the bus bar includes a base member that is electrically coupled to the electrode lead; And is rotatably coupled to the base member, may comprise a rotatable member for pressing said electrode lead interposed between said base member.
[12]
In addition, the rotating member may be provided coupled in pairs respectively to both ends of the base member.
[13]
In addition, the base member includes a pair of the cross member is formed in a horizontal direction; And it may be formed in the longitudinal direction comprise a vertical member for connecting the horizontal member of the pair.
[14]
Further, the cross member is the transverse direction length of each is between the end area of ​​the longitudinal member cross member of said pair is formed longer than the lateral length is formed in the rotary member of the pair can be rotated in the space it may be disposed.
[15]
Further, a plurality of electrode leads are interconnected electrode lead group may be interposed between the base member and the rotating member.
[16]
And, a plurality of electrode leads are coupled to the ultrasonic welding, it is possible to form the electrode lead group.
[17]
It is also possible to combine between the electrode leads are disposed the base member and the rotary member by welding.
[18]
According to another aspect of the present invention, there may be provided a battery pack including the battery module described above, also, there is a car including the battery module may be provided.
Effects of the Invention
[19]
Embodiments of the present invention, since the rotating member presses the electrode lead electrode lead and the base member are electrically connected, by combining bar bus without bending the electrode lead has an effect close contact is possible in the electrode lead and bus bar.
[20]
In addition, the heat generated during welding because the welding between the base member and the rotary member via the electrode lead is distributed uniformly to all the electrode lead there is an effect that the weldability can be improved.
[21]
Further, this manual process is removed for the bending of the electrode lead has an effect that can be improved automated rate of the production line.
Brief Description of the Drawings
[22]
Figure 1 is a prior art electrode leads and the bus bar is electrically coupled to the figure provided in the battery cell.
[23]
Figure 2 is a schematic perspective view which is separate from the battery module according to an embodiment of the invention, the rotating member and the electrode leads and the bus in the rotated state so as not to urge the electrode lead bar.
[24]
Figure 3 is a side cross-section that is coupled from the battery module according to an embodiment of the present invention, in the rotating member is rotated so as not to urge the electrode lead state electrode lead and bus bar.
[25]
Figure 4 is a schematic perspective view which is separate from the battery module according to an embodiment of the present invention, in the rotation of the rotating member to press the electrode lead state electrode lead and bus bar.
[26]
Figure 5 is a side cross-section that is coupled from the battery module according to an embodiment of the present invention, in the rotation of the rotating member to press the electrode lead state electrode lead and bus bar.
[27]
6 is a front view of the bus bar of the battery module in accordance with one embodiment of the present invention.
Mode for the Invention
[28]
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.
[29]
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.
[30]
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.
[31]
In Figure 2, the battery module according to an embodiment of the present invention, the rotary member is a schematic perspective view, which is a bar electrode lead and the bus separation in the rotation state so as not to urge the electrode lead, Fig. 3 is an embodiment of the present invention in the battery in the module, and the rotary member is a side cross-sectional view which is bonded electrode leads and the bus bars in a rotated state so as not to urge the electrode lead, 4 is the battery module according to an embodiment of the present invention according to the rotational member electrode It is a schematic perspective view which is separate from a rotating state to press the lead bar electrode lead and the bus 5 is in the battery module according to an embodiment of the present invention, in a rotating member rotated to press the electrode lead state electrode lead and a bus bar, a cross-sectional side view, which is coupled, Figure 6 is a front view of the bus bar of the battery module in accordance with one embodiment of the present invention.
[32]
Referring to Figure 2 to Figure 6, the battery module 10 according to one embodiment of the present invention includes a battery cell stack 100, and a bus bar (200).
[33]
Battery cell stack 100 may be configured such that the plurality of battery cells 110 are stacked (see Figs. 2 to 5). Battery cells 110 may have a different structure, also, the plurality of battery cells 110 may be stacked in a number of ways. Battery cell 110 is a positive electrode plate-separator-unit are arranged in order of the negative electrode plate cells (Unit Cell) or bipolar plate - separator - negative electrode plate - separator - positive electrode plate-separator-cell a bi-cell (Bi-Cell) arranged in order of the negative electrode plate It may have a structure in which a plurality of lamination according to the capacity.
[34]
Battery cells 110 may include an electrode lead (111). Electrode lead 111 is exposed to the outside has a conductive material may be used as a type of terminal being connected to an external device. Electrode lead 111 may include a positive electrode lead and the negative electrode lead. To the positive electrode lead and negative electrode lead are equal to each other with respect to the longitudinal direction of the battery cell 110, the length and to the direction may be each arranged in the opposite direction, or the positive electrode lead and the negative electrode lead, the battery cell 110 in the direction It may be located.
[35]
Battery cell stack 100 may be provided with a plurality of cartridges for accommodating the battery cell 110 (not shown). Each cartridge (not shown) may be made by injection molding of plastic, it may be a stacked plurality of cartridge accommodating portion capable of accommodating the battery cell 110 is formed (not shown). A plurality of cartridges (not shown) are stacked cartridge assembly may be provided with a connector element, or terminal element. Connector elements, for example, battery cell 110 may provide the data for the voltage or temperature BMS (Battery Management System, not shown) may include various types of electrical connection part to the connection member for connection or the like that of have. Then, the terminal element comprises a positive terminal and the negative terminal as a main terminal coupled to the battery cell 110, the terminal element is provided with a terminal bolt can be connected to external devices electrically. On the other hand, the battery cells 110 may have various shapes.
[36]
Bus bar 200 is coupled to the electrode lead 111 is provided at each of a plurality of battery cells (110). Here, the bus bar 200 presses the electrode lead (111), whereby the bus bars 200 and the electrode leads 111 can be connected electrically. Electrical and electronic connection may comprise a series or in parallel.
[37]
Bus bar 200 may include a base member 210 and the rotary member 220. It will be described below, the base member 210, a rotary member 220.
[38]
The base member 210 can be coupled electrically connected (see Figs. 3 and 5), below the rotating member 220 to the electrode lead (111). Base member 210 may be formed of various materials and shapes. Base member 210 has a conductive material may be used to be electrically connected to the electrode lead (111). 6, the base member 210, for example, be provided is formed in the lateral direction of the pair of spaced apart from each other on the upper and lower cross member (211a, 211b). Then, the base member 210, for example, be provided with a vertical member 212 which is formed in the longitudinal direction. Here, the vertical members 212, may be provided to connect the central portion of the cross member of a pair of spaced apart from each other (211a, 211b). Then, the base member 210 as shown in Figure 6 may be a horizontal direction length (L1) of the cross member 211 is formed longer than the lateral length (L2) of the longitudinal member 212. For example, the base member 210 may be formed in a substantially 'エ' shape as a whole. And it may be the base member 210 is this way has the same shape, there is space 213 between the respective side end portions of the pair of transverse members spaced apart from each other (211a, 211b) is formed. Then, the rotating member of the pair will be described later (220a, 220b) may be rotatably disposed in a space 213 formed between each end of the space 213, that is, the pair of the cross member (211a, 211b) have.
[39]
The rotary member 220 presses the is rotatably coupled to the base member 210 (see Figs. 2 and 4), the rotating member of the electrode lead 111 is interposed between the 220 and the base member 210 . The rotating member 220 may be provided as a pair, a pair of rotating members (220a, 220b) is a cross member of the pair of the base member side end portions, i.e., a base member 210 described above in 210 of the ( the space 213 is formed between each of both side ends of 211a, 211b) it can be coupled, respectively. The rotating member 220 may be rotatably coupled to the rotating shaft 230 are respectively coupled to a pair of transverse members (211a, 211b). 2 and 3, the rotating member 220 is in a position where it does not urge the electrode lead (111). Here, the electrode leads 111 are inserted into the space formed between the base member 210 and the rotary member 220. And, Figures 4 and 5, the rotary member 220 to rotate to press the electrode lead 111 is located. Here, the electrode lead (111) by the pressing of the rotating member 220 to be in contact with the base member 210 is held electrically connected.
[40]
On the other hand, a plurality of electrode leads 111 are, 2 to Referring to Figure 5, the base member 210 and the rotating member 220 made of each of the electrode leads 111 are coupled together the electrode lead group 112 It may be interposed between. That is, it interposed between a state a plurality of electrode leads 111 are detached without being bonded to each other to a base member 210 and the rotating member 220 to the rotating member 220 is rotated, even if the pressure of the electrode leads 111 , it may not be smooth the contact between the electrode lead 111, in which case it can be a problem with the electrical connection of the electrode lead 111 and the bus bar 200. Therefore, in combination with each other around a plurality of electrode lead 111 is in advance to through a plurality of electrode leads (111) between the base member 210 and the rotating member 220 to form an electrode lead group 112, as described above the formed electrode lead groups 112 and interposed between the base member 210 and the rotating member 220, the electrode lead group 112 by the rotation of the rotary member 220 is pressed toward the base member 210. A plurality of electrode leads 111 for this purpose are combined by ultrasonic welding, it is possible to form the electrode lead group 112. However, not necessarily limited to the ultrasonic welding, there can be combined a plurality of electrode lead 111 may be used are a variety of ways. Further, there is no problem in electrically connecting the electrode lead 111 and the bus bar 200, without forming the electrode lead group 112, in a state a plurality of electrode leads 111 are not bonded to each other to a base member ( between 210) and the rotating member 220 may be interposed.
[41]
Then, the electrode lead 111, e.g., when the electrode lead group 112 is interposed between the base member 210 and the rotating member 220 is welded between the base member 210 and the rotation member 220, e.g. instance be coupled to a laser welding (300, see FIG. 5). That is, the electrode leads 111 are combined in advance by ultrasonic welding or the like, the electrode leads 111 are joined by ultrasonic welding or the like formed electrode lead group 112 is interposed between the base member 210 and the rotating member 220 It is coupled to a laser welding (300) including a base member 210 and the rotary member 220. With this electrode lead 111 may be electrically connected with the bus bar 200.
[42]
With reference to the drawings will be described operations and effects of the battery module 10 according to one embodiment of the invention.
[43]
Referring to Figure 2 to Figure 6, the bus bar 200 is provided with a rotation member 220 rotatably coupled to the base member 210, base member 210. When the rotational member 220 is rotated is coupled to a rotating shaft 230 coupled to the base member 210 and the electrode leads 111 are sandwiched between the base member 210 and the rotating member 220 rotating element 220 is It rotates and presses the electrode lead (111) toward the base member 210. Here, the electrode lead 111 may include, for example ultrasonic welding are combined in advance by forming the electrode lead group 112, and the electrode lead group 112 is interposed between the base member 210 and the rotation member 220 rotates If the member pressed 220 is rotated and the contact is urged toward the electrode lead group 112 is a base member (210), wherein, for between the base member 210 and the rotation member 220, for example, laser welding 300 combine with and electrically coupled to the electrode lead group 112 and the bus bar 200.
[44]
According to this manner, since without bending the electrode lead 111, unlike in the prior art coupled to bus bar 200 it may be the electrode leads 111 are in close contact with the bus bar 200. And, may be, for example improving the weldability, so the laser weld (300) in the event of heat is one of the electrode rather than being concentrated on the lead 111 is evenly distributed to all the electrode lead 111 is, as in Fig. 5 .
[45]
On the other hand, a battery pack (not shown) in accordance with one embodiment of the present invention may include one or more of the battery module 10 according to one embodiment of the present invention as described above. In addition, the battery pack (not shown), such a battery module 10 in addition to, various devices for controlling the charging and discharging of the case, a battery module 10 for receiving such a battery module 10, such as BMS, current the sensor, a fuse or the like can be further included.
[46]
Meanwhile, the vehicle (not shown) in accordance with one embodiment of the present invention may include a battery module (10) above or a battery pack (not shown), in the battery module 10. The battery pack (not shown) this may be included. Then, the battery module 10 according to one embodiment of the present invention, the motor vehicle (not shown), for example, be applied to certain of the vehicle (not shown) that is adapted to use electrical, such as an electric car or a hybrid car can.
[47]
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
[48]
The invention is applicable to industries related to, in particular, relates to a secondary battery, the battery pack including the battery module, and it.

Claims
[Claim 1]
A plurality of battery cell stack the battery cells are stacked; And a battery module, characterized in that comprises a bus bar electrode leads are provided, each coupled to the battery cells of said plurality, said bus bar on which the bus bar and the electrode leads are electrically connected to the pressing of the electrode lead.
[Claim 2]
The method of claim 1, wherein the bus bar includes a base member that is electrically coupled to the electrode lead; And is rotatably coupled to the base member, the battery module comprising: a rotating member for pressing said electrode lead interposed between said base member.
[Claim 3]
The method of claim 1, wherein the rotating member is provided with a pair of battery modules being respectively coupled to both ends of the base member.
[Claim 4]
4. The method of claim 3 wherein the base member includes a pair of the cross member is formed in a horizontal direction; And it is formed in the longitudinal direction the battery module comprises a vertical member for connecting the horizontal member of the pair.
[Claim 5]
5. The method of claim 4, wherein the lateral length of the cross member is formed longer than the lateral length of the vertical member between each end of the cross member of the pair has, and space is formed, the rotary member of the pair is the the battery module characterized in that the rotatably disposed in the space.
[Claim 6]
The method of claim 2, wherein the battery module, characterized in that a plurality of electrode leads are interconnected electrode lead group is interposed between the base member and the rotating member.
[Claim 7]
The method of claim 6, wherein the plurality of electrode leads are battery module characterized in that it is coupled to the ultrasonic welding, to form an electrode lead group.
[Claim 8]
The method of claim 2, wherein the battery module, characterized in that the coupling between the electrode leads are disposed the base member and the rotary member by welding.
[Claim 9]
The first battery pack including a battery module according to any one of the preceding claims.
[Claim 10]
FAW including a battery module according to any one of the preceding claims.