Art
[1]This application claims priority to an application for the Korea Patent Application No. 10-2017-0100477, filed on Aug. 08, dated 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 cell and a battery module including the same frame, to a more specific, modular and shared use are possible frame battery cell and a battery module including the same.
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 (2) provided at each of the plurality of battery cells (1) were attached via welding (4) was in contact with the side bus bar 3, the when the electrode lead (2) a large number of hand is required, the electrode lead (2) by an elastic restoring force of the electrode lead (2) of a metallic material and the bus bar (3) by the operator close to maintain the bent shape of the does not, there are also a problem because the weld (4) superimposed on the point at which the decrease in weldability of the plurality of electrode leads (2) to the bus bar (3).
[7]
In addition, the size of the battery cells vary, injecting a thermal resin (Thermal Resin) after a battery cell in which a problem in that the productivity and requires a different size depending on the size of the battery cell frame lowered, the frame assembly, because of defective there is a high problem.
Detailed Description of the Invention
SUMMARY
[8]
Accordingly, the object of the present invention is to provide one with the frame is also a battery cell frame that can be coupled to each of the battery cells having various sizes and a battery module including the same.
[9]
In addition, the battery cell, the battery cell frame capable of reducing the percentage of defective bonding when the heat transfer material that can be in contact and to provide a battery module including the same.
[10]
In addition, since the electrode leads are overlapping to provide a battery pack including the battery module, and it can improve the weldability.
Problem solving means
[11]
According to an aspect of the invention, the bus bar being electrically coupled to an electrode lead of the battery cell; A support member for the bus bar is coupled, wherein the battery cells are in contact supporting the battery cell; And formed on the support member and may be provided with a battery cell frame, characterized in that it comprises a variable-length part whose length is changed so as to be corresponding to the size of the battery cell.
[12]
In addition, the variable-length part, the first variable length section in which the support is formed so as to change a length of a short side direction of the member; And it may comprise a second variable-length portion which is formed so as to change a length of the long side direction of the support member.
[13]
Then, the first variable-length part, fixing part coupled to be fixed to one side of the bus bar; And the high may include in an opposite position of the moving parts of the government to be coupled so as to be movable on the other side of the bus bar.
[14]
In addition, the bus bar, electrically connecting the electrode lead is joined to the battery cell; And it extends in a side of the electrically connecting portion, a first engaging portion that is the fixed portion bond; And it extends toward the other of the electrical connection portion, and may include a second coupling portion that is the moving portion coupled.
[15]
In addition, the bus bar is high and the above high relative to the government and the moving part above the position at which the deflection from the center and the center of the moving part of the state may be coupled to the government and the mobile unit.
[16]
In addition, the bus bar and the high in the center and the center of the lower side of the moving part of the state may be coupled to the government and the mobile unit.
[17]
And, the second to store energy by the variable-length part, rotation or twist may be provided with a helical spring capable of contraction and expansion.
[18]
Further, the second variable length section may be coupled to the heat transfer material (Thermal Interface Material, TIM) to transfer heat.
[19]
And, the heat-conducting material can be coupled to the spiral spring in the expanded state the spiral spring.
[20]
Further, the heat-conducting material can be combined so as to surround at least a portion of the spiral spring.
[21]
According to another aspect of the invention, the above-described battery cell frame; And is electrically coupled to the bar, the bus of the battery cell frame, provided with a battery cell that is in contact with the support member of the battery cell frame, wherein the battery cell is provided in plurality, the battery module, the plurality of battery cells that are cross-laminated It can be provided.
[22]
In addition, the electrode lead of the battery cell may be coupled to the bus bar such that the step is formed.
[23]
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
[24]
Embodiments of the present invention, the frame is, it includes part of the length is changed so as to be corresponding to the size of the battery cell a variable length, there is an effect that a single frame can be coupled to each of the battery cells having various sizes.
[25]
In addition, the second after changing the variable length of the length of the second heat transfer material is bonded to the unit variable-length has an effect which can reduce, because of defective contacts in a battery cell.
[26]
In addition, since the plurality of electrode leads are respectively bonded on the bus bar, a plurality may not overlap, to the electrode leads, there is an effect that can be enhanced weldability thereby.
Brief Description of the Drawings
[27]
Figure 1 is a prior art electrode leads and the bus bar is electrically coupled to the figure provided in the battery cell.
[28]
Figure 2 is a schematic perspective view a coupling battery cells to a battery cell frame according to an embodiment of the present invention.
[29]
Figure 3 is a perspective view of the appearance coupling the electrode lead bus bar in the battery cell frame according to an embodiment of the present invention.
[30]
4 is a plan view of the battery cell frame according to an embodiment of the present invention.
[31]
Figure 5 (a) and Fig. 5 (b) is a view showing a first change in length due to the variable length frame from the battery cell of FIG.
[32]
6 is a view showing a second change in length due to the variable length frame from the battery cell of FIG.
[33]
7 is an overall perspective view of the heat transfer material separating the frame from the battery cell of FIG.
[34]
Figure 8 is a side cross-sectional view of the state coupled to the battery cell, heat transfer material in a frame 7.
[35]
Figure 9 is a schematic perspective view of a battery module according to an embodiment of the present invention.
[36]
10 is a cross-sectional view as viewed along the A-A 'of FIG.
Mode for the Invention
[37]
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.
[38]
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.
[39]
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.
[40]
2 is of a shape combining a battery the battery cell fitted with a schematic overall perspective view of the cell frame, Figure 3 is a bar, the electrode lead bus in the battery cell frame according to an embodiment of the present invention according to one embodiment of the present invention a perspective view, and Figure 4 is a plan view of the battery cell frame according to an embodiment of the present invention, Fig. 5 (a) and 5 (b) is a first length change due to the variable length in the battery cell frame of Figure 4 a view showing, Fig. 6 is a view showing a second change in length due to the variable length frame from the battery cell of FIG.
[41]
2 when to 6, the battery cell frame 100 according to one embodiment of the present invention, comprises a busbar 110, a support member 120, and a variable length portion 130.
[42]
Bus bar 110 is coupled to the electrode lead 210 having the battery cell 200 is electrically connected to an electrode lead (210). Here, the electrical and electronic connection may comprise a series or in parallel. Here, the bus bar 110 may include an electrical connection part 111, the first coupler 112 and the second coupling unit 113 (see Fig. 2). Electrical connections (111) has an electrode lead (210) of the battery cell 200 can be combined (see Fig. 3). Electrical connection 111 may be provided with a conductive material such as copper, and has a shape and size corresponding to the size and shape of the electrode lead (210). A first engaging portion 112 is extended to a side of the electrical connection portion 111, the first fixing part 132 of the variable length portion 131, which will be described later is fixed is coupled to the first coupler (112). A second engaging portion 113 and extends toward the other of the electrical connection portion 111, the first moving portion 133 of the variable length portion 131, which will be described later is coupled to be movable in the second coupling portion 113. The
[43]
Bus bar 110 may be coupled to the fixing part 132 and, based on the height of the mobile unit 133 and at various heights section 132 and the mobile unit 133. For example, the bus bar 110 is fixed (132) and the high and based on the height of the moving unit 133 is positioned at the center of the section 132 the center, and the moving part 133 of the section 132 and It may be coupled to the mobile unit 133, or the fixing part 132 and, based on the height of the mobile unit 133 and position biased from the center of the section 132 the center, and the moving part 133 of, e. for high and in the lower side of the center of the section 132 and the central mobile portion 133 of the may be combined in unit 132 with the moving part (133). When the bus bar 110, the fixing part 132 located in the center of the center and the mobile unit 133 or in, or located in the portions that are deflected from the center of the fixing portion 132, the center and the moving part 133 of, electrode lead 210 of the battery cell 200 may be coupled to bus bar 110 to form a step, as shown in FIG. Thus, either case of reverse stacking an electrode lead (210) a step is formed on the bus bar 110, a plurality of battery cell, the battery cell frame 100, when laminated to 200 in the battery module 300 to be described later when coupled to one of the electrode lead 210 and the other of the electrode lead 210 is in contact it is possible to prevent a short circuit (short) occurs.
[44]
Support member 120 is coupled to bus bar 110, the battery cell 200 is in contact is provided to support the battery cell 200. Here, the support member 120 has a variable length portion 130, which length is changed so as to be corresponding to the size of the battery cell 200 is formed. Also in this way the support member 120, the variable-length part 130 battery cells 200 of different sizes formed by the combination there is the possible effect of the battery cell frame 100.
[45]
A second variable which is formed variable length portion 130 is a support member 120, the length in the long side direction of the first variable length portion 131 is formed such that the length is changed in the short side direction, the support member 120 so as to change the It may comprise a length of 135. Here, the support member 120, the first variable length portion 131 and the second may be contained in both the variable length portion 135, or, the first variable length portion 131 and the second variable length section 135 only one may be included. First variable length section 131 may include a fixing part 132, the mobile unit 133. 4, the fixing part 132 side, for example, are coupled so as to be fixed to the first engaging portion 112 of the bus bar 110, the moving part 133 of the bus bar 110 is fixed the other side of 132, the bus bar 110 in the opposite position of, for example, be coupled to be movable in the second engagement portion 113 of the bus bar 110. the That is, in FIG. 5 (a) and Referring to Figure 5 (b), a first holding a first variable length portion 131 is fixed to the fixing section 132 is a bus bar 110 of the variable length portion 131 may move section 133, only the change in length to correspond to the length of the short sides of the battery cell 200 while moving in a straight line, for example, along a bus bar 110 (see arrow in Fig. 5 (b)). First variable length section 131 in another embodiment may be of a fixed part 132, the moving part 133, all without. Then, the second variable length section 135 is to store energy by rotation or twisting can be provided by a helical spring expansion and contraction. For example, Winding spring may be provided to change the length corresponding to the length of the long side of the battery cell 200 while the long side direction of contraction and expansion of the support member 120 to support member 120. For example, it may be arranged such that the spiral spring expands in the longitudinal direction as shown in Fig. In the spiral spring, as shown in the contracted state 4 Fig. However, it is not the second variable length section 135 is limited to the spiral spring there can shrink and expand in longitudinal direction it may be included in a variety of configurations.
[46]
Figure 7 is an overall perspective view of the heat transfer material separated from the battery cell of the frame 2, Figure 8 is a side cross-sectional view of the state coupled to the battery cell, heat transfer material in a frame 7.
[47]
Second variable length portion 135 to dissipate heat generated from the battery cell 200 has to be a combined heat transfer material (Thermal Interface Material, TIM, 140) to transfer heat, the heat transfer material 140 is a battery It may be contacted directly to the indirect cell 200. Conventionally, after assembling the battery cell 200 to the frame, so injecting the thermal resin (Thermal Resin) Although the problem high percentage of defective, if the battery cell frame 100 according to one embodiment of the invention the helical spring expansion since binding to the heat transfer material 140 is bonded to the helical spring, for example, the heat transfer material 140 is wrapped around at least a portion of the spiral spring in a state, there is an effect that the efficiency of heat radiation is high and the percentage of defective reduced. Further, the second variable the heat transfer material 140, as shown in Fig. In the spiral spring, as shown in 7 expanded state by cutting the heat transfer material 140 according to their length, 8 to form a substantially "U-shaped can be combined so as to surround the spiral spring in the longitudinal section 135 has the advantage of an easy to install.
[48]
With reference to the drawings will be described operations and effects of the battery cell frame 100 according to one embodiment of the present invention.
[49]
And Figures 2 to Referring to Figure 8, the battery cell frame 100 according to one embodiment of the present invention, the first variable length portion 131 is formed such that the length is changed in the short side direction of the support member 120, the support and a second variable length portion 135 is formed with a length in the longitudinal direction of the member 120 to be changed, thereby making it possible to adjust the length in response to the various sizes of battery cells (200). Here, the first movable on the other side of the variable length portion 131 is bus-bar fixing which is coupled so as to be fixed to a side of 110, 132 and fixing 132, the bus bar 110 in the opposite position of the as including the moving section 133 is coupled, and can change the length in the short side direction of the support member 120, the second variable length section 135 is to provided a spiral spring capable of contraction and expansion support members (120 ) it can change the length in the long side direction.
[50]
On the other hand, since the bonding to the heat transfer material 140 is wrapped around at least a portion of the spiral spring in the expanded state the spiral spring has the effect that heat radiation efficiency is the percentage of defective decrease is high.
[51]
9 is a schematic perspective view of a battery module according to an embodiment of the present invention, Figure 10 is a cross-sectional view as viewed along the A-A 'of FIG.
[52]
With reference to the drawings will be described operations and effects of the battery module 300 according to one embodiment of the present invention.
[53]
The battery module 300 according to one embodiment of the present invention, the electrode lead 210 of the battery cell 200 to the bus bar 110 of the example battery cell frame 100 of the above-described embodiments is electrically coupled to, battery cell 200 is supported in contact with the support member 120 of the battery cell frame 100. Then, the plurality of battery cells 200 is coupled to the battery cell frame 100 have been mutually stacked to form a battery cell stack.
[54]
Battery cell stack may be configured such that a plurality of stacked battery cells 200 (see FIGS. 9 and 10). Battery cells 200 may have a different structure, also, the plurality of battery cells 200 may be stacked in a number of ways. Battery cell 200 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.
[55]
Battery cells 200 may include an electrode lead (210). Electrode lead 210 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 210 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 to the longitudinal direction of 200 may be each placed on the opposite direction, or the positive electrode lead and the negative electrode lead, the battery cell 200, direction It may be located. Electrode lead 210 is electrically coupled to the conductive members of the bus bar 110 to be described later.
[56]
Electrode lead 210 of the battery cell 200 may be coupled to bus bar 110 so that the step difference is formed (see FIGS. 9 and 10). This multiple When flip laminated battery cell 200 when the laminated battery cell frame 100, either one of the electrode lead 210 and the other of the electrode lead, as in the embodiment of the above-described battery cell frame 100, for example, the 210 is a contact to prevent a short circuit (short) generating friction.
[57]
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 300 according to one embodiment of the present invention as described above. In addition, the battery pack (not shown), such a battery module 300. In addition, this battery module, various devices for controlling the charging and discharging of the case, the battery module 300 for receiving (300), such as BMS, current the sensor, a fuse or the like can be further included.
[58]
Meanwhile, the vehicle (not shown) is the battery module 300 may include the above-described battery module 300 or battery packs (not shown), and the battery pack (not shown) in accordance with one embodiment of the present invention this may be included. Then, the battery module 300 according to one embodiment of the 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.
[59]
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
[60]
The invention is applicable to industries related to, in particular, secondary batteries relates to a battery module including a frame and this battery cell.

Claims

[Claim 1]Bus bars that is electrically coupled to an electrode lead of the battery cell; A support member for the bus bar is coupled, wherein the battery cells are in contact supporting the battery cell; And the battery cell frame, characterized in being formed in the support member that it comprises parts of variable length, which length is changed so as to be corresponding to the size of the battery cell.
[Claim 2]
The method of claim 1, wherein the first variable length section which is formed the variable length portion, the length in the short side direction of the support member to change; And the battery cell frame, characterized in that it comprises a second variable-length portion which is formed so as to change a length of the long side direction of the support member.
[Claim 3]
The method of claim 2, wherein the first variable-length part, fixing part coupled to be fixed to one side of the bus bar; And the high battery cell frame in opposite position characterized in that it comprises a movement that is coupled movably to the other side of the bus bar of the government.
[Claim 4]
The method of claim 3, wherein the bus bar, electrically connecting the electrode lead is joined to the battery cell; And it extends in a side of the electrically connecting portion, a first engaging portion that is the fixed portion bond; And it extends toward the other of the electrical connection portion, the battery cell frame, characterized in that it comprises a second coupling portion that the mobile combined.
[Claim 5]
The method of claim 3, wherein the bus bar has a fixing portion and said at positions where the deflection above on the basis of the moving portion in height and from the center and the center of the moving part of the state and characterized in that coupled to the government and the mobile unit battery cell frame.
[Claim 6]
The method of claim 5, wherein the bus bar of the battery cell frame, characterized in that the high and in the center of the central lower side of the moving part of the state coupled to the government and the mobile unit.
[Claim 7]
The method of claim 2, wherein the second variable length section to store energy by rotation or twisting battery cell frame, characterized in that it comprises a helical spring capable of contraction and expansion.
[Claim 8]
The method of claim 7, wherein the second variable length portion, the battery cell frame, characterized in that the combined heat transfer material (Thermal Interface Material, TIM) to transfer heat.
[Claim 9]
The method of claim 8 wherein the heat-conducting material is a battery cell frame, characterized in that coupled to the spiral spring in the spiral spring is expanded state.
[Claim 10]
10. The method of claim 9, wherein the heat transfer material is the battery cell frame, characterized in that the coupling so as to surround at least a portion of the spiral spring.
[Claim 11]
Claim 1 to claim 10, wherein in any one of the battery cell frame; And is electrically coupled to the bar, the bus of the battery cell frame, provided with a battery cell that is in contact with the support member of the battery cell frame, wherein the battery cell is provided in plurality, the plurality of battery cells are battery modules, which are mutually laminated.
[Claim 12]
The method of claim 11, wherein the electrode lead of the battery cell of the battery module, characterized in that coupled to the bus bar such that the step is formed.
[Claim 13]
A battery pack including a battery module according to claim 11.
[Claim 14]
Car comprising a battery module according to claim 11.