Secondary battery module

Abstract

The present invention relates to a secondary battery module that can be arranged in various ways within a secondary battery pack and that can improve the efficiency of the pack's design by facilitating series or parallel connections between its constituent cells. The secondary battery module, according to the present invention, may comprise: several cells arranged facing each other; and a rotating element positioned between the respective surfaces of one cell and another facing cell within the cell assembly, which rotates one cell relative to the other.

Description

Secondary battery module Technical field Cross-reference to related request This application claims the benefit of priority of Korean patent application no. 10-2022-0039953, filed on March 30, 2022. Technical field The present invention relates to a secondary battery module and, more particularly, to a secondary battery module comprising a plurality of cells. Background of the technique In recent years, the price of energy sources has risen due to the depletion of fossil fuels, increasing concern about environmental pollution and making the demand for environmentally friendly alternative energy sources an indispensable factor for the future. Consequently, research continues into various energy generation technologies such as solar, wind, and tidal power, and energy storage devices such as batteries are also of great interest for using generated electricity more efficiently. Furthermore, as technological development increases and the demand for battery-powered mobile devices and electric vehicles grows, the demand for batteries as energy sources is rapidly increasing. Therefore, numerous studies have been conducted on batteries capable of meeting diverse demands. Batteries that store electrical energy can generally be classified as primary and secondary batteries. A primary battery is a disposable, consumable battery. A secondary battery, on the other hand, is a rechargeable battery made from a material in which the oxidation and reduction processes between the current and the material are repeatable. That is, when the current reduces the material, it charges. When the current oxidizes the material, it discharges. This charging and discharging process is repeated to generate electricity. Recently, as the need for large capacity structures increases in addition to their use as a source of energy storage, the demand for secondary battery packs, in which a plurality of cells or secondary battery modules are added, is increasing, and therefore the demand for secondary battery modules is also increasing. A secondary battery module, according to the related technology, has a fixed structure based on a frame for manufacturing a secondary battery pack. Furthermore, the orientation and arrangement of a terminal are fixed by the frame, and the degree of freedom in the internal design of the secondary battery pack is limited. To solve this problem, there is a need for a secondary battery module that can be designed relatively freely inside the secondary battery pack and applied in various ways. Document KR 20160017150 A discloses a lithium polymer secondary battery that includes a module connection portion arranged between a plurality of secondary battery modules to change the orientation of the plurality of secondary battery modules. Document KR 20160088002 A discloses a plurality of battery packs connected by a pivot rotation structure. Disclosure of the invention TECHNICAL PROBLEM The present invention has been made to solve the above problems, and an object of the present invention is to provide a secondary battery module that can be arranged inside a secondary battery pack in various shapes and easily established in series or parallel between cells inside the secondary battery pack, thereby improving the efficiency in the design of the secondary battery pack. TECHNICAL SOLUTION A secondary battery module according to the present invention includes a plurality of cells arranged to face each other, and a rotating member disposed between a surface of one cell and a surface of another cell, which face each other in the plurality of cells, wherein one cell rotates with respect to the other cell. The secondary battery module may also include an adhesive material that bonds the rotating member to the cell. The rotating member includes: a first rotating plate disposed at a center of the surface of one cell; a second rotating plate disposed at a center of the surface of the other cell; and a rotating shaft configured to connect the first rotating plate to the second rotating plate such that the first rotating plate and the second rotating plate are rotatable relative to each other and extending in a direction orthogonal to the surfaces of the plurality of cells. The rotating shaft may have an elastic force that attracts the first rotating plate and the second rotating plate, which are separated from each other. The first rotating plate and the second rotating plate may include magnetic materials to attract each other. The rotating plate may include a projection that extends into the second rotating plate, and the second rotating plate may include a recess that is cut into a shape corresponding to that of the projection, wherein the second rotating plate rotates, and the projection is inserted into the recess in such a way that the first rotating plate and the second rotating plate are secured to each other. Each of the projection and the recess can be formed in a number of two such that the first rotating plate and the second rotating plate are fixed to each other when either the first rotating plate or the second rotating plate is rotated to an angle of 180 degrees in the fixed state. Each of the projection and the recess can be formed in a number of four such that the first rotating plate and the second rotating plate are fixed to each other when the first rotating plate or the second rotating plate is rotated to an angle of 90 degrees in the fixed state. The secondary battery module may further include: a first terminal disposed on an edge of one surface or the other surface of the cell; and a second terminal disposed on an edge opposite the first terminal on one surface or the other surface of each cell, wherein the first terminal may include: a first upper terminal disposed to project from one surface of the cell to the other cell; a first lower terminal disposed in the same plane as one surface of the cell; and a symmetrical first terminal disposed in a position corresponding to the first upper terminal in the same plane as the other surface of the cell, and the second terminal may include: a second upper terminal disposed to project from the other surface of the cell to the other cell facing the cell; a second lower terminal disposed in the same plane as the other surface of the cell;and a second symmetrical terminal arranged in a position corresponding to the second upper terminal in the same plane as a surface of a cell, wherein the first terminal and the second terminal may have opposite polarities to each other and are coupled to each other in corresponding positions to fix the cell.; In the first and second terminals, when one cell is parallel to the other cell, the first upper terminal of one cell and the first symmetrical terminal of the other cell are in contact with each other, and the second symmetrical terminal of one cell and the second upper terminal of the other cell are in contact with each other to connect in parallel, and when one cell is rotated to an angle of 180 degrees with respect to the other cell, the first upper terminal of one cell and the second lower terminal of the other cell are in contact with each other, and the first lower terminal of one cell and the second upper terminal of the other cell are in contact with each other to connect in series. A first terminal and a second terminal, having opposite polarities to each other, may be provided at both ends of the plurality of cells, and the secondary battery module may further include at least one of: a parallel connection member configured to electrically connect the first terminals to each other or to electrically connect the second terminals to each other; or a series connection member configured to electrically connect the first terminal to the second terminal. ADVANTAGEOUS EFFECTS The secondary battery module according to the present invention includes the plurality of cells arranged to face each other and the rotating member disposed between the surface of one cell and the surface of the other cell, which face each other in the plurality of cells, and in which one cell rotates with respect to the other cell. Therefore, the secondary battery module can be arranged inside the secondary battery pack in various ways, and it can be easily set in series or parallel between the cells inside the secondary battery pack, thereby improving efficiency when designing the secondary battery pack. Brief description of the drawings Figure 1 is a schematic perspective view illustrating a secondary battery module according to Embodiment 1 of the present invention. Figure 2 is a schematic perspective view illustrating a state in which a cell of the secondary battery module rotates according to Embodiment 1 of the present invention. Figure 3 is a schematic perspective view illustrating a rotating member of the secondary battery module according to Embodiment 1 of the present invention. Figure 4 is a schematic perspective view illustrating a cell, a first terminal, and a second terminal of the secondary battery module according to Embodiment 1 of the present invention. Figure 5 is a schematic view illustrating a state in which the first terminal and the second terminal are arranged on the cell of the secondary battery module according to Embodiment 1 of the present invention. Figure 6 is a schematic view illustrating a state in which the cells are connected to each other by the first terminal and the second terminal of the secondary battery module according to Embodiment 1 of the present invention. Figure 7 is a schematic perspective view illustrating a secondary battery module according to Embodiment 2 of the present invention. Figure 8 is a schematic perspective view illustrating a rotating member of the secondary battery module according to Embodiment 2 of the present invention. Figure 9 is a schematic perspective view illustrating a cell, a first terminal, and a second terminal of the secondary battery module according to Embodiment 2 of the present invention. Figure 10 is a schematic perspective view illustrating a state in which a parallel connecting member and a series connecting member are arranged according to Embodiment 2 of the present invention. Method for carrying out the invention The preferred embodiments of the present invention will be described in detail hereafter with reference to the accompanying drawings so that those skilled in the art may readily implement the present invention. However, the present invention can be implemented in various ways and is not limited or restricted by the following examples. To clearly explain the present invention, detailed descriptions of portions irrelevant to the description or of related known technologies that might unnecessarily hinder understanding of the present invention have been omitted. Reference symbols have been added to the components in each drawing of this specification. In this case, the same or similar reference numbers have been assigned to identical or similar elements throughout the specification. Figure 1 is a schematic perspective view illustrating a secondary battery module 100 according to Embodiment 1 of the present invention, and Figure 2 is a schematic perspective view illustrating a state in which a cell 110 of the secondary battery module 100 rotates according to Embodiment 1 of the present invention. The present invention provides a secondary battery module 100 as in Embodiment 1. The secondary battery module 100 according to Embodiment 1 of the present invention includes a cell 110 and a rotating member 120. Referring to Figure 1, cell 110 of secondary battery module 100 is provided in the plural to indicate orientation towards one another. In this case, cell 110 may signify a bag cell. The 110 cells can be arranged in parallel with each other, and the secondary battery module 100 according to Implementation 1 can include 12 110 cells. The rotating member 120 of the secondary battery module 100 is positioned between a surface of one cell 110a (see Figure 6) and a surface of the other cell 110b, which face each other, in the plurality of cells 110. In this case, one cell 110a is configured to rotate with respect to the other cell 110b. "One cell 110a" may not mean a specific cell, but may mean any cell in the plurality of cells 110. Furthermore, "the other cell 110b" may mean a cell adjacent to one cell 110a. Figure 2 illustrates a state in which an externally located cell 110 is rotated to an angle of approximately 90 degrees. Referring to Figure 2, each of the cells 110 can be rotated with respect to the other cell 110 by means of a rotation member 120. In the present case, cell 110 can be rotated to an angle of 360 degrees. The state in which the cells 110 are arranged in the secondary battery module 100 can be efficiently changed by the rotating member 120. The secondary battery module 100 according to Embodiment 1 of the present invention may further include an adhesive material (not shown). The rotating member 120, more specifically the rotating plates 121 and 122 (see Figure 3) which will be described later, may be attached to the cell 110 by means of the adhesive material. Specifically, the adhesive material can be applied to a portion of the surface of cell 110 on which the rotating member 120 is disposed. The cell 110 of the secondary battery module 100 and the rotating member 120 can be joined together and efficiently secured using adhesive material. Figure 3 is a schematic perspective view illustrating the rotating member 120 of the secondary battery module 100 according to Embodiment 1 of the present invention. Specifically, (A) of Figure 3 schematically illustrates a state in which the first rotating plate 121 and the second rotating plate 122 are in contact with each other, and (B) of Figure 3 schematically illustrates a state in which the first rotating plate 121 rotates while separated from the second rotating plate 122, and (C) of Figure 3 schematically illustrates a state in which the first rotating plate 121, which has rotated, and the second rotating plate 122 attract each other. The rotating member 120 of the secondary battery module 100 according to Embodiment 1 of the present invention includes the first rotating plate 121, the second rotating plate 122, and a rotating shaft 123. The first rotating plate 121 is arranged at a center on the surface of one cell 110a, and the second rotating plate 122 is arranged at a center on the surface of the other cell 110b. Referring to Figure 3, each of the first rotation plate 121 and the second rotation plate 122 can be formed in a substantially disk-like shape, and the first rotation plate 121 and the second rotation plate 122 can have substantially the same cross-sectional area. However, the shape and area of ​​each of the rotation plates 121 and 122 are not limited to the same. The rotation tree 123 is configured to connect the first rotation plate 121 to the second rotation plate 122 to be rotatable relative to each other and extends in a direction orthogonal to the surfaces of the plurality of cells 110. Specifically, the rotation tree 123 can be formed in a substantially tree-like shape and can have a smaller cross-sectional area than the cross-sectional area of ​​each of the first rotation plate 121 and the second rotation plate 122. Furthermore, the rotation shaft 123 according to Embodiment 1 can be arranged in the center of the surface of the first rotation plate 121 or the second rotation plate 122. The first rotation plate 121 or the second rotation plate 122 can rotate around a rotation axis 123, and the cells 110 can be rotated together by rotating the first rotation plate 121 or the second rotation plate 122. Each of the cells 110 can be efficiently rotated by means of components included in the rotation member 120. The rotating shaft 123 of the rotating member 120 according to Embodiment 1 of the present invention may be elastic. Specifically, the rotating shaft 123 may be made of a material that has elasticity. The rotating shaft 123 can attract the first rotating plate 121 and the second rotating plate 122, which are separated from each other by an elastic force. Either the first rotating plate 121 or the second rotating plate 122 can rotate while separated. The elastic force can act on the first rotating plate 121 and the second rotating plate 122, which are separated from each other, in a direction of mutual attraction by the rotating shaft 123. That is, an attractive force can be provided such that the first rotating plate 121 and the second rotating plate 122, rotating at a desired angle, are in contact with each other through the elastic force of the rotating shaft 123. If the rotation shaft 123 has elasticity, after rotation, the first rotation plate 121 or the second rotation plate 122 can move efficiently to be in contact with each other. The first rotating plate 121 of the rotating member 120 according to Embodiment 1 of the present invention may include a projection 121-1, and the second rotating plate 122 may have a recess 122-1. The projection 121-1 can be formed to project from a surface of the first rotating plate 121 into the second rotating plate 122, and the recess 122-1 can be formed to be recessed in a shape corresponding to that of the projection 121-1 into a surface of the second rotating plate 122. Because the projection 121-1 is inserted into the recess 122-1, the first rotating plate 121 and the second rotating plate 122 can be efficiently fixed to each other. The projection 121-1 according to Embodiment 1 may have a substantially rectangular parallelepiped shape to be easily fixed in the insertion state in the recess 122-1. Each of the projection 121-1 and the recess 122-1 may be provided in a plural number. The plurality of projections 121-1 may be separated from each other at a certain angle in a circumferential direction of the first rotating plate 121, and the plurality of recesses 122-1 may be separated from each other at a certain angle in a circumferential direction of the second rotating plate 122. The angle at which the plurality of projections 121-1 are separated from each other can be the same as the angle at which the plurality of recesses 122-1 are separated from each other. Therefore, provided that the first pivot plate 121 and the second pivot plate 122 are rotated relative to each other at the above angles, the first pivot plate 121 and the second pivot plate 122 can be fixed to each other again. For example, two protrusions 121-1 and two recesses 122-1 can be formed according to Embodiment 1 of the present invention. Referring to Figure 3, the projections 121-1 can be formed on an edge of the first rotating plate 121, and the two projections 121-1 can be arranged in a line that can be a diameter of a surface of the first rotating plate 121 that has a substantially circular shape. That is, the two projections 121-1 can be separated from each other at an angle of 180 degrees. Similarly, the recesses 122-1 can be formed at both ends of the second rotating plate 122, and the two recesses 122-1 can be arranged in a line that can be a diameter of a surface of the second rotating plate 122 that has a substantially circular shape. That is, the two recesses 122-1 can be separated from each other at an angle of 180 degrees. Because the two protrusions 121-1 and the two recesses 122-1 are formed in corresponding positions with each other, when the first rotating plate 121 or the second rotating plate 122 rotates to an angle of 180 degrees in the fixed state, the first rotating plate 121 or the second rotating plate 122 can be fixed to each other again. Therefore, the first rotation plate 121 or the second rotation plate 122 can be efficiently fixed to each other even when rotated to an angle of 180 degrees. Figure 4 is a schematic perspective view illustrating cell 110, a first terminal 130, and a second terminal 140 of the secondary battery module 100 according to Embodiment 1 of the present invention, and Figure 5 is a schematic view illustrating a state in which the first terminal 130 and the second terminal 140 are arranged on cell 110 of the secondary battery module 100 according to Embodiment 1 of the present invention. Specifically, (A) of Figure 5 schematically illustrates cell 110 of Figure 4 when viewed from above, (B) of Figure 5 schematically illustrates cell 110 of Figure 4 when viewed from the left side of Figure 4, and (C) of Figure 5 schematically illustrates cell 110 of Figure 4 when viewed from the right side of Figure 4. The secondary battery module 100 according to Embodiment 1 of the present invention may further include the first terminal 130 and the second terminal 140. Referring to figure 4, the first terminal 130 and the second terminal 140 can be arranged on both sides of one surface or the other surface of cell 110. In the present case, the first terminal 130 and the second terminal 140 may have opposite polarities. The first terminal 130 may include a first upper terminal 131, a first lower terminal 132 and a first symmetric terminal 133, and the second terminal 140 may include a second upper terminal 141, a second lower terminal 142 and a second symmetric terminal 143. Referring to Figure 5, the first upper terminal 131 can be arranged to protrude into the other cell 110 arranged to face a surface of cell 110, and the first lower terminal 132 can be arranged in the same plane as a surface of cell 110. In the present case, the first lower terminal 132 can be arranged below the first upper terminal 131. The first symmetric terminal 133 can be arranged in the same plane as the other surface opposite one side of cell 110. In the present case, the first symmetric terminal 133 can be arranged in a position on the other surface corresponding to the first upper terminal 131 on one surface. Referring to Figure 5, the second upper terminal 141 can be arranged to protrude towards the other cell 110 arranged to face the other surface of cell 110, and the second lower terminal 142 can be arranged in the same plane as the other surface of cell 110. In the present case, the second lower terminal 142 can be arranged below the second upper terminal 141. The second symmetric terminal 143 can be arranged in the same plane as a surface opposite the other surface of cell 110. In the present case, the second symmetric terminal 143 can be arranged in a position on a surface corresponding to the second upper terminal 141 on the other surface. Figure 6 is a schematic view illustrating a state in which the cells 110 are connected together by the first terminal 130 and the second terminal 140 of the secondary battery module 100 according to Embodiment 1 of the present invention. Specifically, (A) of Figure 6 schematically illustrates a state in which one cell 110a and the other cell 110b are connected in parallel with each other, and (B) of Figure 6 schematically illustrates a state in which one cell 110a and the other cell 110b are connected in series with each other. The first terminal 130 and the second terminal 140 of the secondary battery module 100 according to Embodiment 1 of the present invention may have opposite polarities and may be electrically connected through a contact between them. Referring to (A) in Figure 6, the first upper terminal 131 of cell 110a and the first symmetrical terminal 133 of cell 110b are in contact with each other, and the second symmetrical terminal 143 of cell 110a and the second upper terminal 141 of cell 110b are in contact with each other to be connected in parallel. In this case, cell 110a and cell 110b can be parallel to each other. Specifically, the first upper terminal 131 of one cell 110a can protrude to be in contact with the first symmetrical terminal 133 of the other cell 110b in a corresponding position, and the second upper terminal 141 of the other cell 110b can protrude to be in contact with the second symmetrical terminal 143 of one cell 110a in a corresponding position. In addition, one cell 110a can be connected in series to the other cell 110b in a state of rotating to an angle of 180 degrees. Referring to (B) in Figure 6, when one cell 110a is rotated at an angle of 180 degrees with respect to the other cell 110b, the first upper terminal 131 of one cell 110a and the second lower terminal of the other cell 110b can be in contact with each other, and the first lower terminal 132 of one cell 110a and the second upper terminal 141 of the other cell 110b can be in contact with each other to be connected in series. Specifically, the first upper terminal 131 of a cell 110a that rotates to an angle of 180 degrees can protrude to be in contact with the second lower terminal 142 of the other cell 110b in a corresponding position, and the second upper terminal 141 of a cell 110b can protrude to be in contact with the first lower terminal 132 of a cell 110a, which has rotated, in a corresponding position. The secondary battery module 100 can efficiently configure the cells 110 by connecting the cells 110 in series or in parallel using the components included in the first terminal 130 and the components included in the second terminal 140, and therefore efficiency can be improved when designing the secondary battery pack. Figure 7 is a schematic perspective view illustrating a secondary battery module 200 according to Embodiment 2 of the present invention, and Figure 8 is a schematic perspective view illustrating a rotating member 220 of the secondary battery module 200 according to Embodiment 2 of the present invention. Specifically, (A) of Figure 8 schematically illustrates a state in which the first rotating plate 221 and the second rotating plate 222 are in contact with each other, and (B) of Figure 8 schematically illustrates a state in which the first rotating plate 221 rotates while separated from the second rotating plate 222, and (C) of Figure 8 schematically illustrates a state in which the first rotating plate 221, which has rotated, and the second rotating plate 222 attract each other. The present invention provides the secondary battery module 200 which has a different type as Embodiment 2. Henceforth in this document, a detailed description of the same configuration as that of the secondary battery module 100 according to Embodiment 1 of the present invention will be omitted. Referring to Figure 7, the secondary battery module 200 according to Embodiment 2 of the present invention may include a cell 110, a rotating member 220, a first terminal 230 and a second terminal 240. The rotating member 220 may include a first rotating plate 221 and a second rotating plate 222. In addition, the first rotating plate 221 may include a projection 221-1, and the second rotating plate 222 may have a recess 222-1. Referring to Figure 8, each of the first rotation plate 221 and the second rotation plate 222 can be formed in a substantially disk-like shape, and the first rotation plate 221 and the second rotation plate 222 can have substantially the same cross-sectional area. However, the shape and area of ​​each of the rotation plates 221 and 222 are not limited to the same. Four projections 221-1 and four recesses 222-1 can be formed according to Embodiment 2 of the present invention. The plurality of projections 221-1 can be separated from each other at an angle of 90 degrees in a circumferential direction of the first rotating plate 221, and the plurality of recesses 222-1 can be separated from each other at an angle of 90 degrees in a circumferential direction of the second rotating plate 222. Referring to Figure 8, the projections 221-1 can be formed on four edges of the first rotating plate 221, and the four projections 221-1 can be arranged in a line that can be a diameter of a surface of the first rotating plate 221 that has a substantially circular shape and a line that can have a different diameter perpendicular to the diameter. Similarly, the recesses 222-1 can be formed on four edges of the second rotating plate 222, and the four recesses 222-1 can be arranged in a line that can be a diameter of a surface of the second rotating plate 222 that has a substantially circular shape and a line that can have a different diameter perpendicular to the diameter. Because the four protrusions 221-1 and the four recesses 222-1 are formed in corresponding positions with each other, whenever the first rotating plate 221 or the second rotating plate 222 rotates to an angle of 90 degrees in the fixed state, the first rotating plate 221 or the second rotating plate 222 can be fixed to each other again. Therefore, the first rotating plate 221 or the second rotating plate 222 can be efficiently fixed to each other even when rotated to angles of 90 degrees, 180 degrees and 270 degrees. Each of the first rotating plate 221 and the second rotating plate 222 according to Embodiment 2 of the present invention may include a magnetic material. The force that attracts the first and second rotating plates 221 and 222 separated from each other by magnetism can be applied to the first rotating plate 221 and the second rotating plate 222. The first rotating plate 221 or the second rotating plate 222 can be separated from each other by a rotating shaft 123 whose length is adjustable and which can rotate while both plates are separated. In this case, a magnetic force can be applied to the first rotating plate 221 and the second rotating plate 222 in the separated state, in a direction such that the first rotating plate 221 and the second rotating plate 222 are attracted to each other by magnetism. That is, an attractive force can be provided such that the first rotating plate 221 and the second rotating plate 222, rotating at a desired angle, are in contact with each other through the magnetic force. If each of the first rotating plate 221 and the second rotating plate 222 includes the magnetic material, the first rotating plate 221 and the second rotating plate 222 can be moved such that either the first rotating plate 221 or the second rotating plate 222 are in contact with each other again after rotation. Figure 9 is a schematic perspective view illustrating cell 110, first terminal 230, and second terminal 240 of the secondary battery module 200 according to Embodiment 2 of the present invention, and Figure 10 is a schematic perspective view illustrating a state in which a parallel connection member 250 and a series connection member 260 are arranged according to Embodiment 2 of the present invention. Specifically, (A) of Figure 10 schematically illustrates a state in which two 110 cells are connected in parallel with each other, and (B) of Figure 10 schematically illustrates a state in which two 110 cells are connected in series with each other. Referring to Figure 9, the first terminal 230 and the second terminal 240 of the secondary battery module 200 can have opposite polarities and can be provided at both ends of the plurality of cells 110, respectively. In this case, the size of each of the first terminal 230 and the second terminal 240 can vary depending on the shape of the secondary battery module 200. Because the secondary battery module 200 according to Embodiment 2 of the present invention includes the rotating member 220 arranged between the cells 110, the cells 110 can be arranged to be separated from each other. Furthermore, the first terminal 230 and the second terminal 240 provided on each cell 110 can also be arranged to be separated from each other and may not be in contact with each other. Therefore, the secondary battery module 200 requires an additional component capable of connecting the first terminal 230 and the second terminal 240 to each other. As an example of the component capable of electrically connecting the first terminal 230 and the second terminal 240 to each other, the secondary battery module 200 according to Embodiment 2 of the present invention may further include at least one of a parallel connection member 250 or a series connection member 260. The parallel connection member 250 can electrically connect the first terminals 230 to each other or electrically connect the second terminals 240 to each other, and the series connection member 260 can electrically connect the first terminal 230 and the second terminal 240 to each other. Referring to Figure 10, the parallel connection member 250 and the series connection member 260 can be arranged on opposite sides of cell 110 based on the first terminal 230 or the second terminal 240, which are arranged at both ends of cell 110. The parallel connection members 250 can have different shapes according to the number of terminals that have the same polarity connected to each other. The secondary battery module 200 according to Embodiment 2 of the present invention may include the parallel connection member 250 and the series connection member 260 to be efficiently established by a series connection or a parallel connection. The secondary battery module 100 according to Embodiment 1 of the present invention and the secondary battery module 200 according to Embodiment 2 of the present invention can be easily arranged in series or in parallel for electrical connection between the cells 110 inside the secondary battery pack, thereby improving efficiency when designing the secondary battery pack. In this regard, an example for the electrical adjustment between cells 110 is briefly described as follows. The 100 and 200 secondary battery modules, which include 12 110 cells, can be easily converted to a configuration where all 12 110 cells are connected in series, or where six pairs of two 110 cells connected in parallel are connected in series. Additionally, a configuration where four pairs of three 110 cells connected in parallel are connected in series, or where three pairs of four 110 cells connected in parallel are connected in series, can also be easily implemented. Therefore, the secondary battery modules 100 and 200 of the present invention can be easily designed in various shapes to be arranged inside the secondary battery pack. Description of the symbols 100, 200: Secondary battery module 110, 110a, 110b: Cell 120, 220: Rotating Member 121, 221: First rotation plate 121-1, 221-1: Outgoing 122, 222: Second rotation plate 122-1, 222-1: Reduction 123: Rotation Tree 130, 230: First terminal 131: First upper terminal 132: First lower terminal 133: First symmetric terminal 140, 240: Second terminal 141: Second upper terminal 142: Second lower terminal 143: Second symmetrical terminal 250: Parallel connection member 260: Serial connection member

Claims

1. A secondary battery module (100, 200) comprising: a plurality of cells (110) arranged to face each other; and a rotating member (120, 220) disposed between a surface of one cell (110a) and a surface of another cell (110b), which face each other in the plurality of cells (110), wherein one cell (110a) rotates with respect to the other cell (110b) by the rotating member (120, 220), characterized in that the rotating member (120, 220) comprises: a first rotating plate (121, 221) disposed at a center of the surface of one cell (110a); a second rotating plate (122, 222) disposed at a center of the surface of the other cell (110b); and a rotating shaft (123) configured to connect the first rotating plate (121, 221) to the second rotating plate (122, 222) such that the first rotating plate (121, 221) and the second rotating plate (122,222) are rotatable relative to each other and extending in a direction orthogonal to the surfaces of the plurality of cells (110).

2. The secondary battery module of claim 1, further comprising an adhesive material that bonds the rotating member (120, 220) to each cell.

3. The secondary battery module of claim 1, wherein the rotating shaft (123) has an elastic force that attracts the first rotating plate (121, 221) and the second rotating plate (122, 222), which are separated from each other.

4. The secondary battery module of claim 1, wherein the first rotating plate (121, 221) and the second rotating plate (122, 222) comprise magnetic materials for attracting each other.

5. The secondary battery module of claim 1, wherein the rotating plate (120, 220) comprises a projection (121-1, 221-1) projecting towards the second rotating plate (122, 222), and the second rotating plate (122,222) comprises a recess (122-1, 222-1) that is recessed in a shape corresponding to that of the projection (121-1, 221-1), wherein the second rotating plate (122, 222) rotates, and the projection (121-1, 221-1) is inserted into the recess (122-1, 222-1) such that the first rotating plate (121, 221) and the second rotating plate (122, 222) are fixed to each other.

6. The secondary battery module of claim 5, wherein each of the projection (121-1) and the recess (122-1) is formed in a number of two such that the first rotating plate (121) and the second rotating plate (122) are locked together when either the first rotating plate (121) or the second rotating plate (122) is rotated through an angle of 180 degrees in the locked-together state.

7. The secondary battery module of claim 5,wherein each of the projection (221-1) and the recess (222-1) is formed in a number of four such that the first rotating plate (221) and the second rotating plate (222) are fixed to each other when the first rotating plate (221) or the second rotating plate (222) is rotated to an angle of 90 degrees in the fixed-to-each-other state.

8. The secondary battery module of claim 1, further comprising: a first terminal (130, 230) disposed on an edge of one or the other surface of each cell (110); and a second terminal (140, 240) disposed on an edge opposite the first terminal on one or the other surface of each cell (110), wherein the first terminal (130,230) comprises: a first upper terminal (131) arranged to project from one surface of a cell (110a) to the other cell (110b); a first lower terminal (132) arranged in the same plane as one surface of a cell (110a); and a first symmetrical terminal (133) arranged in a position corresponding to the first upper terminal (131) in the same plane as the other surface of a cell (110a), and the second terminal (140, 240) comprises: a second upper terminal (141) arranged to project from the other surface of a cell (110a) to the other cell (110b) facing the cell (110a); a second lower terminal (142) arranged in the same plane as the other surface of a cell (110a); and a second symmetric terminal (143) arranged in a position corresponding to the second upper terminal (141) in the same plane as the surface of the cell (110a), wherein the first terminal (130,230) and the second terminal (140, 240) have opposite polarities to each other and couple to each other in corresponding positions to fix each cell (110a).

9. The secondary battery module of claim 8, wherein, at the first terminal (130, 230) and the second terminal (140, 240), when one cell (110a) is parallel to the other cell (110b), the first upper terminal of one cell (110a) and the first symmetric terminal (133) of the other cell (110b) are in contact with each other, and the second symmetric terminal (143) of one cell (110a) and the second upper terminal (141) of the other cell (110b) are in contact with each other to be connected in parallel, and when one cell (110a) is rotated at an angle of 180 degrees with respect to the other cell (110b), the first upper terminal (131) of one cell (110a) and the second lower terminal (142) of the other cell (110b) are in contact with each other,and the first lower terminal (132) of one cell (110a) and the second upper terminal (141) of the other cell (110b) are in contact with each other to be connected in series.

10. The secondary battery module of claim 1, wherein a first terminal (130, 230) and a second terminal (140, 240), having opposite polarities to each other, are provided at both ends of the plurality of cells (110), and the secondary battery module (100, 200) further comprises at least one of: a parallel connection member (250) configured to electrically connect the first terminals (130, 230) to each other or to electrically connect the second terminals (140, 240) to each other; and a series connection member (260) configured to electrically connect the first terminal (130, 230) to the second terminal (140, 240).

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