Battery module including zigzag arrangement of connection terminals and battery pack including the same

Abstract

The present invention relates to a battery module capable of improving coupling space efficiency, and more particularly, to a battery module including one or more battery cells inside a case, and connection terminals arranged at a center portion of each side surface of the case, wherein each of the connection terminals includes at least one pair of positive and negative terminals. The positive and negative terminals are connected to the battery cells in the case, both of the positive and negative terminals protrude to the outside, and the positive terminals, gaps between the positive terminals and the negative terminals, and the negative terminals are arranged at the same interval with respect to the center of the case.

Description

Technical Field

[0001] This application claims priority to Korean Patent Application No. 2021-0054117, filed on April 27, 2021, the disclosure of which is incorporated herein by reference in its entirety.

[0002] This invention relates to a battery module including Z-shaped connection terminals, and more specifically, to a battery module including Z-shaped connection terminals located at the center of opposite sides of the battery module. When multiple battery modules are connected to each other, the Z-shaped connection terminals are connected to each other in a concave-convex shape and electrically connected to each other via a central busbar to form a battery pack. Background Technology

[0003] Unlike small mobile devices such as smartphones, medium to large devices such as electric vehicles require high-output, high-capacity batteries. Batteries used in electric vehicles typically employ a structure where multiple battery cells are assembled together. This can be achieved using battery modules in which multiple battery cells are connected in series or parallel, or battery packs in which multiple battery modules are interconnected. Multiple battery cells are assembled to form a battery module, and multiple battery modules are assembled to form a battery pack. Electrode leads or connectors on one battery cell are electrically connected to electrode leads or connectors on another battery cell, and connection terminals on one battery module are electrically connected to connection terminals on another battery module.

[0004] Traditionally, to connect battery modules to each other, busbars are added separately to the housing that makes up the battery pack, or the connection terminals of the battery modules are connected to each other via separate wires. In this case, separate space is required between the battery modules, which reduces energy density and requires many processes and steps for electrical connection.

[0005] Patent document 1 discloses a battery pack configured such that at least a portion of the contact surfaces of a plurality of battery module housings are connected to each other, thereby reducing the volume of the battery pack to less than the sum of the volumes of its outermost module housings.

[0006] Patent Document 1 adds protrusions and recesses configured to allow adjacent housings to engage when multiple battery modules are connected, thereby effectively utilizing space. However, in Patent Document 1, each module housing is directional, so this orientation must be considered during assembly. Furthermore, while physical connections are considered, electrical connections, a fundamental function of actual battery modules, are not. In Patent Document 1, dedicated space for electrical connections between battery modules is necessary; therefore, an important structural element for effectively utilizing space is neglected.

[0007] Patent Document 2 discloses a battery module configured to allow workers manufacturing battery packs to easily electrically connect the battery modules to each other while maintaining space efficiency. Patent Document 2 relates to a battery module assembly in which multiple battery cells are mounted, the battery module assembly essentially comprising a battery module, a first connecting plate assembly, and a second connecting plate assembly, wherein a second positive busbar and a second negative busbar of the second connecting plate assembly protrude in a direction perpendicular to the protruding directions of the first positive and first negative terminals of the first connecting plate assembly.

[0008] In Patent Document 2, a separate connecting plate was added to facilitate connection with pre-prepared connecting terminals (such as busbars) when each battery module is housed within the battery pack housing.

[0009] The shortcomings of Patent Documents 1 and 2 are that, although they aim to make efficient use of space, the battery modules can only be assembled in a specific direction, and a separate busbar is required for electrical connection.

[0010] (Existing technical documents)

[0011] (Patent Document 1) Korean Patent Application Publication No. 2021-0013861

[0012] (Patent Document 2) Korean Patent Registration No. 1943493 Summary of the Invention

[0013] Technical issues

[0014] The present invention was made in view of the above problems, and the object of the present invention is to provide a battery module and a battery pack consisting of the battery modules connected to each other, wherein the battery modules are configured such that when multiple battery modules are connected to each other, the battery modules can be assembled regardless of the orientation of the battery modules, thereby achieving high operating efficiency and high space efficiency without the use of separate busbars.

[0015] Technical solution

[0016] According to the present invention, a battery module that achieves the above objectives includes: one or more battery cells housed in a housing; and a connection terminal comprising at least one pair of positive and negative terminals disposed at the middle portion of each of opposite side surfaces of the housing, wherein the positive and negative terminals are connected to the battery cells in the housing, each of the positive and negative terminals protruding outwards, and the positive terminals, the gap between the positive and negative terminals, and the negative terminals are arranged at equal intervals based on the center of the housing.

[0017] The positive terminal, the gap between the positive and negative terminals, and the negative terminal can be arranged at equal intervals based on the center of the housing, but the width of the actual protruding portion of each of the positive and negative terminals can be smaller than the gap between the positive and negative terminals.

[0018] The positive and negative terminals can be centrosymmetric with respect to the shell.

[0019] The outward protrusion heights of the positive and negative extremes can be equal.

[0020] Undulated or recessed portions can be added to each of the opposite side surfaces of the housing.

[0021] An insulator may be placed on the outside of each of the positive and negative terminals.

[0022] The protruding shapes of the positive and negative terminals can mesh with the external shape of the shell between the positive and negative terminals.

[0023] Only one pair of positive and negative terminals can be provided on each of the opposite side surfaces of the housing.

[0024] In addition, the present invention provides a battery pack including a battery module, wherein the battery module is connected to another battery module.

[0025] Adjacent battery modules can form a connection part where the connection terminals are connected to each other.

[0026] The positive terminal of one battery module and the negative terminal of the closest battery module can be electrically connected to each other via a central busbar.

[0027] Only one positive terminal of a pair of adjacent battery modules and the negative terminal of the closest battery module can be electrically connected to each other via a central busbar.

[0028] In addition, the present invention can also provide possible combinations of the above solutions.

[0029] Technical effect

[0030] As can be seen from the above description, the battery module according to the present invention is constructed to be physically connected and electrically connected to another battery module, thereby reducing the connection space in which the battery modules are connected to each other, and thus achieving a high energy density per unit volume. Furthermore, the battery module has a symmetrical structure, which facilitates assembly of the battery module regardless of orientation, resulting in high operating efficiency.

[0031] The battery module connection section consists of protruding connection terminals, and the connection terminals of adjacent battery modules are easily electrically connected to each other using an intermediate busbar.

[0032] In addition, when the battery modules are connected to each other, each connection terminal of the battery module includes a positive and a negative terminal, so it is easy to change between series and parallel connections by simply changing the shape of the intermediate busbar. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of a battery module according to a first embodiment of the present invention.

[0034] Figure 2 This is a schematic diagram of the connection terminals of a battery module according to a first embodiment of the present invention.

[0035] Figure 3 This is a front view showing the connection shape of two adjacent battery modules according to a first embodiment of the present invention, and an enlarged view of the connection portion.

[0036] Figure 4 The diagram illustrates various variations of the connecting portion according to the first embodiment of the present invention.

[0037] Figure 5 This is a perspective view of the connection terminals of a battery module according to a first embodiment of the present invention.

[0038] Figure 6 This is a front view showing the connection portion of two adjacent battery modules connected to each other in a concave-convex shape according to a first embodiment of the present invention.

[0039] Figure 7 This is a top view showing the state in which the connection terminals of two adjacent battery modules according to the first embodiment of the present invention are connected to each other in a concave-convex shape and electrically connected to each other using an intermediate busbar.

[0040] Figure 8 This is an exploded perspective view showing an example of two adjacent battery modules electrically connected to each other using an intermediate busbar according to a first embodiment of the present invention.

[0041] Figure 9 The diagram illustrates various variations of the intermediate busbar according to the present invention.

[0042] Figure 10 This is a front view showing the connection shape of two adjacent battery modules with concave and convex portions according to a second embodiment of the present invention. Detailed Implementation

[0043] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, enabling them to be easily implemented by those skilled in the art. However, in describing the operational principles of the preferred embodiments of the present invention, detailed descriptions of known functions and structures incorporated herein may obscure the subject matter of the invention.

[0044] Furthermore, throughout the accompanying drawings, the same reference numerals will be used to refer to components that perform similar functions or operations. Where a component is referred to as "connected to another component" throughout the specification, the first component may not only be directly connected to the second component, but also indirectly connected to the second component via yet another component. Additionally, unless otherwise stated, including an element does not imply the exclusion of other elements, but rather means that these elements may be further included.

[0045] Furthermore, unless otherwise specified, descriptions of elements by limiting or adding to them are applicable to all inventions and do not limit any particular invention.

[0046] Furthermore, in the description of the invention and the claims of this application, unless otherwise mentioned, the singular form is intended to include the plural form.

[0047] Furthermore, in the description of the invention and the claims of this application, unless otherwise mentioned, "or" includes "and". Therefore, "including A or B" refers to three cases: including A, including B, and including both A and B.

[0048] In addition, unless the context explicitly states otherwise, all ranges of numbers include the minimum value, the maximum value, and all intermediate values ​​in between.

[0049] In the following, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0050] Figure 1 This is a schematic diagram of a battery module according to a first embodiment of the present invention. Figure 2 This is a schematic diagram of the connection terminals of a battery module according to a first embodiment of the present invention. Figure 3 This is a front view showing the connection shape of two adjacent battery modules according to a first embodiment of the present invention, and an enlarged view of the connection portion.

[0051] Reference Figure 1 and Figure 2 According to a first embodiment of the present invention, the battery module 100 includes one or more battery cells (not shown) housed in a housing, wherein connection terminals 200A and 200B, each including at least one positive terminal and / or at least one negative terminal, may be located on opposite side surfaces of the housing.

[0052] In this invention, battery cells can be stably arranged using a casing, a stacked frame, or the like. Each battery cell includes an electrode assembly, a battery housing, and electrode leads and / or electrode connectors. The electrolyte can be contained within the battery housing of the battery cell. The electrode leads can include positive and negative leads. The positive lead can be connected to the positive connector of the electrode assembly, while the negative lead can be connected to the negative connector of the electrode assembly.

[0053] In this invention, the battery cell can be a pouch-shaped secondary battery. For a pouch-shaped secondary battery, the battery casing can be a pouch-shaped sheath member. The pouch-shaped sheath member can be constructed with a structure having a metal foil (such as aluminum) placed between insulating layers. As described above, when the battery cell is composed of a pouch-shaped battery, it is easier to connect multiple battery cells.

[0054] In a battery cell, the two electrode leads or connectors (i.e., the positive lead or positive connector and the negative lead or negative connector) can be configured to protrude in opposite or the same direction.

[0055] The module may include busbars configured to electrically connect electrode leads or connectors of battery cells stacked within the module housing, and may include a connection plate assembly including internal terminals connected to the busbars. The connection plate assembly may be located separately within the module housing, or it may be a side surface of the module housing. Specifically, in this invention, when the connection plate assembly is located separately within the module housing, the connection plate assembly may be positioned in close contact with a side surface of the module housing, and the connection plate assembly may include electrode terminals 2100, which will be described below (see...). Figure 5 This is electrically connected via a busbar to the internal electrode terminals located at the connection plate assembly. Internal electrode terminals and electrode terminal 2100 (see...) Figure 5 Electrode terminals 2100 (see...) can be formed at the corresponding location, or they can be formed at different locations. Figure 5 This can perform the function of changing the electrode position of the battery module 100. That is, the electrode terminals 2100 (see...) Figure 5 It performs the function of changing the position and / or orientation of the electrodes of the battery module, and provides electrodes configured to connect the battery module 100 to the outside.

[0056] Connection terminal 200 (see) Figure 5 It is positioned at the midpoint of the opposite side surface of the module housing of the battery module 100. Figure 1 In the diagram, the connecting terminals are shown as connecting terminal 200A located on the left side surface and connecting terminal 200B located on the right side surface. However, for the sake of clarity in describing the invention and drawing the accompanying drawings, a distinction has been made between them here.

[0057] Reference Figure 5 and Figure 2 and Figure 3 The connection terminals 200A and 200B according to the first embodiment of the present invention are described in detail together.

[0058] Figure 2 This shows the magnified state, such as Figure 3 The connection terminals of the two battery modules positioned adjacent to each other are shown.

[0059] like Figure 3 As shown, each of the connection terminals 200A and 200B may include an electrode terminal protruding from a side surface of the battery module in close contact with each other in the external direction (x-axis direction). The electrode terminals may include a first electrode terminal 2110 and a second electrode terminal 2120. In this invention, the first electrode terminal may be a positive or negative electrode, while the second electrode terminal may be a negative or positive electrode. The first electrode terminal and the second electrode terminal are electrode terminals with opposite electrical polarities.

[0060] Each of the connecting terminals 200A and 200B includes: an electrode terminal 2100, which includes a first electrode terminal 2110 and a second electrode terminal 2120; and a base portion 2200, which includes a first base portion 2210 and a second base portion 2220.

[0061] Specifically, electrode terminals 2100 include a first electrode terminal 2110 and a second electrode terminal 2120 positioned spaced apart from each other by a predetermined distance, and base portion 2200 includes a first base portion 2210 formed between the first electrode terminal 2110 and the second electrode terminal 2120, and a second base portion 2220 positioned adjacent to one of the first electrode terminal 2110 and the second electrode terminal 2120. That is, the first electrode terminal 2110, the first base portion 2210, the second electrode terminal 2120, and the second base portion 2220 constitute a connection terminal 200.

[0062] exist Figure 2 In this document, reference numerals are used to distinguish the first electrode terminal 2110A, the second electrode terminal 2120A, the first base portion 2210A, and the second base portion 2220A constituting the connection terminal 200A from the first electrode terminal 2110B, the second electrode terminal 2120B, the first base portion 2210B, and the second base portion 2220B constituting the connection terminal 200B; however, descriptions of structural elements with the same names may be used interchangeably.

[0063] exist Figure 2In this configuration, the electrode terminals of battery module 100A are located in and connected to the base portion of battery module 100B, while the electrode terminals of battery module 100B are located in and connected to the base portion of battery module 100A. Figure 2 In this diagram, for ease of description, the gap is shown as being defined between the outermost surface of each electrode terminal and the innermost surface of the corresponding base portion. However, in practice, each electrode terminal and the corresponding base portion can be tightly connected to each other.

[0064] In a first embodiment of the present invention, the width d9 of each of the first electrode terminals 2110A and 2110B and the width of each of the second electrode terminals 2120A and 2120B are equal to each other, and the width d10 of each of the first base portions 2210A and 2210B and the width of each of the second base portions 2220A and 2220B are equal to each other. The connection terminals 200A and 200B connected to each other at the battery modules 100A and 100B have a symmetrical structure of first electrode terminal 2110 / first base portion 2210 / second electrode terminal 2120 / second base portion 2220 or second base portion 2220 / second electrode terminal 2120 / first base portion 2210 / first electrode terminal 2110.

[0065] With the electrode terminals of battery module 100A and battery module 100B fully connected to each other, a predetermined gap is defined between the connected electrode terminals to allow them to engage.

[0066] Specifically, such as Figure 2 As shown, the second electrode terminal 2120B of the connection terminal 200B of the battery module 100B is located in the first base portion 2210A of the connection terminal 200A of the battery module 100A. A predetermined gap d12 is defined between the opposing surfaces of the second electrode terminal 2120B and the first electrode terminal 2110A, and a predetermined gap d23 is defined between the opposing surfaces of the second electrode terminal 2120B and the second electrode terminal 2120A. In this invention, as described above, adjacent electrode terminals are arranged to be spaced apart from each other by predetermined gaps d12 and d23 at the connection portion, thus, the battery modules can be easily connected to each other.

[0067] exist Figure 2 In this context, d2 and d6 each represent the length from the center of the predetermined gap d12 to the center of the predetermined gap d23, and d1 to d8 are designed to have the same value.

[0068] Furthermore, the center lines between d2 and d3 and between d6 and d7 are positioned to pass through the center of electrode terminal 2100 in the y-axis direction.

[0069] The protrusion height (x-axis direction) of the electrode terminals 2100 protruding outward from the battery module housing is equal to that of each other. The advantages of this are: stable connection between the connection terminals 200, improved space efficiency of the connection part, and installation of the intermediate busbar 3000 for electrical connection (described below), without external stress caused by twisting or deformation.

[0070] Figure 4 This is a diagram illustrating various variations of the connecting portion 400 according to a first embodiment of the present invention.

[0071] In this invention, the connection portion where the protruding shape of the electrode terminal 2100 constituting the connecting terminal 200 and / or the recessed shape of the base portion 2200 connect to each other can be formed as a triangular connection portion 400A, a trapezoidal connection portion 400B, or a wavy connection portion 400C. When the shape of the actual protruding portion of the electrode terminal is triangular or wavy, the width of the actual protruding portion of the electrode terminal can be equal to the distance between the electrode terminals.

[0072] Furthermore, as another unrestricted example, the width of the actual protruding portions of the electrode terminals can be inconsistent. The outermost portion can be the widest, and its width can gradually decrease towards the module housing. Conversely, the outermost portion can be the narrowest, and its width can gradually increase towards the module housing. In the structure where the outermost portion is the widest and its width gradually decreases towards the module housing, the connection force between the battery module and its adjacent battery module is further increased after they are connected, which is beneficial for improving the stability of the connected battery modules.

[0073] Figure 5 This is a perspective view of the connection terminals of a battery module according to a first embodiment of the present invention.

[0074] Reference Figure 5 According to the first embodiment of the present invention, the connection terminal 200 is shown in the order of first electrode terminal / first base portion / second electrode terminal / second base portion; however, the connection terminal may be arranged in the order of second electrode terminal / first base portion / first electrode terminal / second base portion.

[0075] According to a first embodiment of the invention, the connection terminal 200 is positioned corresponding to the center of each of the opposite side surfaces of the battery assembly. Furthermore, the connection terminal can be located at the center of the battery module in the thickness direction (z-axis direction). Additionally, even if the battery module 100 is rotated 180 degrees in the vertical direction (y-axis direction), or even if the battery module is rotated 180 degrees about the x-axis (i.e., the battery module is flipped inward in the front-to-back direction (based on the paper plane)), the position of the connection terminal 200 on the opposite side surface of the battery module housing based on the front surface (xy plane) remains unchanged. In this case, the advantage is that when adjacent battery modules are connected to each other, the side surfaces in the battery module housing where the connection terminal 200 is located can be adjacent to and connected to each other, regardless of the battery module's orientation.

[0076] The first electrode terminal 2110 includes a first electrode busbar 2111, a first electrode busbar through-hole 2112, and a first electrode cover 2113. The second electrode terminal 2120 includes a second electrode busbar 2121, a second electrode busbar through-hole 2122, and a second electrode cover 2123. Here, the first electrode busbar through-hole 2112 and the second electrode busbar through-hole 2122 can be fixed to the first electrode busbar 2111 and the second electrode busbar 2121 respectively using separate fixing tools, or they can be used as areas for fixing intermediate busbars. Furthermore, the first electrode cover 2113 covers the first electrode busbar 2111 and the first electrode busbar through-hole 2112, while the second electrode cover 2123 covers the second electrode busbar 2121 and the second electrode busbar through-hole 2122. Each of the first electrode cover 2113 and the second electrode cover 2123 is positioned around the side surface (xz plane) of the electrode terminal and positioned around the side surface (yz plane) of the electrode terminal opposite to the battery module, and is made of an insulating material. Additionally, the xy plane can be surrounded when the battery modules are stacked. The protruding shape of the electrode terminal 2100 and the outer shape of the electrode cover between the electrode terminals 2100 can engage with each other.

[0077] A protrusion (not shown) with a predetermined thickness (x-axis direction) can be formed on the surface of the second base portion 2220 opposite to the second electrode terminal 2120. The protrusion may be formed as a result of extending as part of the module housing of the battery module. The advantage of the protrusion is that it stabilizes the arrangement of the electrode terminals of adjacent battery modules located in the second base portion 2220.

[0078] Figure 6 This is a front view showing the connection portion of two adjacent battery modules connected to each other in a concave-convex shape according to a first embodiment of the present invention. Figure 7This is a top view showing the state in which the connection terminals of two adjacent battery modules according to a first embodiment of the present invention are connected to each other in a concave-convex shape and electrically connected to each other using an intermediate busbar. Figure 8 This is an exploded perspective view showing an example of two adjacent battery modules electrically connected to each other using an intermediate busbar according to a first embodiment of the present invention.

[0079] Reference Figure 5 and Figure 6 This describes a connection portion where the connection terminals of two adjacent battery modules are connected to each other in a raised-concave shape. The connection terminals 200A and 200B of the two adjacent battery modules are connected to each other in a raised-concave shape to form a connection portion 400. Specifically, the first electrode terminal 2110A and the second electrode terminal 2120A of the connection terminal 200A can be located at and connected to the second base portion 2220 and the first base portion 2210 of the connection terminal 200B of the adjacent battery module.

[0080] Reference Figure 7 The electrode terminals 2100 located in the connection section 400 are electrically connected to each other using an intermediate busbar 3000. Figure 7 In the diagram, the electrode terminals of the battery module connection terminal 200A below the continuous dashed lines and the electrode terminals of the adjacent battery module connection terminal 200B above the continuous solid lines are connected to each other in a concave-convex shape. The first electrode busbar 2111A and the second electrode busbar 2121A of the connection terminal 200A are electrically connected to the second electrode busbar 2121B and the first electrode busbar 2111B of the adjacent connection terminal 200B via an intermediate busbar 3000. In this invention, two intermediate busbars 3000 can be installed, or only one intermediate busbar 3000 can be installed.

[0081] Despite Figure 7 The middle busbar 3000 connects the positive and negative terminals to each other, but can also be used to make parallel connections between positive terminals or between negative terminals as needed.

[0082] Reference Figure 8 The intermediate busbar 3000A can be formed in the shape of "[" and can include a horizontal portion 3100A and a vertical portion 3200A of the intermediate busbar bent from opposite sides of the horizontal portion 3100A. Here, the two vertical portions 3200A of the intermediate busbar are inserted through the first electrode busbar through-hole 2112B and the second electrode busbar through-hole 2122A respectively, electrically connecting the connection terminal 200A and the connection terminal 200B to each other. Figure 8The diagram shows an integral intermediate busbar 3000 with curved, opposite ends; however, the horizontal and vertical portions of the intermediate busbar can be separated from each other. As an example, holes can be formed at opposite ends of the horizontal portion of the intermediate busbar, and the vertical portion can be connected to these holes, and further connected to electrode terminals. For the separable intermediate busbar 3000, the standards of the horizontal and vertical portions can differ, which is advantageous for connections between battery modules with various standards.

[0083] In this invention, the intermediate busbar vertical portion 3200A of the intermediate busbar 3000 can be installed in the electrode busbar through hole, and can include an additional fixing member configured to prevent the intermediate busbar 3000 installed therein from separating due to vibration.

[0084] Figure 9 This is a diagram illustrating various variations of the intermediate busbar according to the present invention. For example... Figure 9 As shown, the intermediate busbar 3000C may include a horizontal portion 3100C and a vertical portion 3200C bent from opposite sides of the horizontal portion 3100C. The distal ends of the two vertical portions 3200C, positioned facing each other, may be bent. The increased force of close contact between the bent distal ends and the inner surface of the electrode busbar through-hole is advantageous in preventing intermediate busbar separation.

[0085] Additionally, the intermediate busbar 3000D may include a horizontal portion 3100D and a vertical portion 3200D that curves from opposite sides of the horizontal portion 3100D. The intermediate busbar 3000D may include a vertical portion extending downwards in a trapezoidal shape from opposite sides of the horizontal portion 3100D. Alternatively, each vertical portion may include a pair of vertical portion plates 3210 and 3220, the distance between the pair of vertical portion plates 3210 and 3220 gradually increasing with increasing distance from the horizontal portion 3100D. Furthermore, a curved portion configured to curve outwards may be located at a predetermined position on each of the pair of vertical portion plates. Although the curved portion is shown as having a gentle curve, it is clear that the shape of the curved portion is not limited.

[0086] Figure 10 This illustrates the connection shape of two adjacent battery modules with concave and convex portions according to a second embodiment of the present invention.

[0087] In addition to the irregular portions formed on opposite side surfaces of the battery module housing, the battery module according to the second embodiment of the present invention is similar to the reference... Figures 1 to 9 The battery module described according to the first embodiment is the same, so only the uneven portions formed on the side surface of the housing will be described.

[0088] A battery module according to a second embodiment of the invention includes a raised / lower portion 4000 formed on each of the opposing side surfaces of the housing. The raised / lower portion 4000 is located in the remaining area of ​​the side surface of the housing, excluding the area where the connection terminal 200 is located. The raised / lower portion 4000 formed on one side surface of the battery module is configured such that concave and convex portions are alternately formed and symmetrically arranged to correspond to convex and concave portions alternately arranged on the other side surface opposite to said one side surface. Therefore, the same shape is maintained when the battery module rotates, which is advantageous for easy connection between battery modules. The raised / lower portion 4000 is advantageous for improving the connection stability between battery modules and for preventing separation or deformation of the connection portion 400.

[0089] The shape of the protrusion 4000 can be a polygon such as a triangle, quadrilateral, or pentagon, or a curved wave. As a non-limiting example of the protrusion, the protrusion can be a dummy terminal that has the same spacing and shape as the positive and negative terminals, but has no actual electrical connection.

[0090] The raised / recessed portion 4000 can be integrally formed with the battery module housing and can be made of the same material as the housing. Alternatively, the raised / recessed portion 4000 can be manufactured separately and then adhered or glued to the side surface of the battery module. When the raised / recessed portion is manufactured separately, it can be made of the same material as the module housing or an elastic material. When the raised / recessed portion is made of an elastic material, it can absorb external impacts to protect the battery module.

[0091] Those skilled in the art will understand that, based on the above description, various applications and modifications can be made within the scope of this invention.

[0092] (Description of reference numerals in the attached image)

[0093] 100, 100A, 100B: Battery modules

[0094] 200, 200A, 200B: Connection terminals

[0095] 400, 400A, 400B, 400C: Connection parts

[0096] 2100: Electrode terminal

[0097] 2110, 2110A, 2110B: First electrode terminals

[0098] 2111, 2111A, 2111B: First electrode busbar

[0099] 2112, 2112B: Through holes of the first electrode busbar

[0100] 2113: First electrode cover

[0101] 2120, 2120A, 2120B: Second electrode terminals

[0102] 2121, 2121A, 2121B: Second electrode busbars

[0103] 2122, 2122A: Second electrode busbar through hole

[0104] 2123: Second electrode cover

[0105] 2200: Base section

[0106] 2210, 2210A, 2210B: First base section

[0107] 2220, 2220A, 2220B: Second base section

[0108] 3000, 3000A, 3000C, 3000D: Intermediate busbars

[0109] 3100A, 3100C, 3100D: Horizontal section of intermediate busbar

[0110] 3200A, 3200C: Vertical section of the intermediate busbar

[0111] 3210, 3220: Vertical section of the intermediate busbar plate

[0112] 4000: Concave and convex parts

Claims

1. A battery module, the battery module comprising: One or more battery cells, said one or more battery cells being housed in a housing; as well as Two connecting terminals are respectively located on opposite side surfaces in the width direction of the housing and are disposed at the middle portion of each of the opposite side surfaces of the housing. Each connection terminal includes a pair of positive and negative terminals, as well as a pair of positive and negative base portions. in, Specifically, for each connection terminal, the negative terminal and the negative terminal base portion are disposed between the positive terminal and the positive terminal base portion. The positive terminal and the negative terminal are connected to the battery cell inside the casing. Wherein, for each connection terminal, the positive terminal and the negative terminal protrude outward in the width direction of the housing, and The positive terminal and the positive base portion of the two connection terminals are symmetrical with respect to the center of the housing, and the negative terminal and the negative base portion of the two connection terminals are symmetrical with respect to the center of the housing.

2. The battery module according to claim 1, wherein, For each connection terminal, the positive terminal, the gap between the positive terminal and the negative terminal, and the negative terminal are arranged at equal intervals based on the center of the housing; however, The width of the actual protruding portion of each of the positive and negative terminals is smaller than the gap between the positive and negative terminals.

3. The battery module according to claim 1, wherein, The positive and negative terminals protrude outward to the same height.

4. The battery module according to claim 1, the battery module further comprising a concave-convex portion formed on each of the opposite side surfaces of the housing.

5. The battery module according to claim 4, wherein, The uneven portion is located in the remaining area of ​​the opposite side surface of the housing, excluding the area where the connecting terminal is located.

6. The battery module according to claim 5, wherein, The concave and convex portions formed on one side surface of the battery module are configured such that concave portions and convex portions are alternately formed and symmetrically arranged to correspond to convex portions and concave portions alternately arranged on another side surface opposite to the one side surface.

7. The battery module according to claim 1, wherein, An insulator is provided on the outside of each of the positive and negative terminals.

8. The battery module according to claim 1, wherein, The protruding shapes of the positive and negative terminals engage with the external shape of the housing between the positive and negative terminals.

9. A battery pack comprising a battery module according to any one of claims 1 to 8, wherein, The battery module is connected to another battery module.

10. The battery pack according to claim 9, wherein, The adjacent battery modules form a connection portion where the connection terminals are connected to each other.

11. The battery pack according to claim 9, wherein, The positive terminal of one battery module in adjacent battery modules and the negative terminal of the other battery module closest to that one battery module are electrically connected to each other via a central bus bar.

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