Battery pack and electrical device including same

Abstract

A battery pack, according to the present invention, comprises: a plurality of battery cells having first and second electrodes; a cell frame for supporting and accommodating the plurality of battery cells; a power busbar disposed at the outermost portion on one side of the cell frame, and electrically connected to the battery cells in one direction by means of a plurality of connecting wires; and a power busbar seating part having the power busbar seated, and having a power busbar guide rib protruding to one side so as to guide the seating of the power busbar, wherein one side surface of the power busbar and an end portion on one side of the power busbar guide rib have the same height as each other.

Description

Battery pack and electric device including same

[0001] The present invention relates to a battery pack and an electric device including the same, and more particularly, to a battery pack capable of stable high-power discharge while maintaining a fusing function, and an electric device including the same.

[0002] This application claims priority to Korean Patent Application No. 10-2024-0087647, filed July 3, 2024, the entire disclosure of which is incorporated herein by reference.

[0003] Recently, as the demand for portable electronic products such as laptops, video cameras, and mobile phones has rapidly increased, and the development of electric vehicles, energy storage batteries, robots, and satellites has been in full swing, research on high-performance secondary batteries capable of repeated charging and discharging is actively being conducted.

[0004] Currently commercially available secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, and lithium-ion batteries. Among these, lithium-ion batteries are attracting attention for their advantages over nickel-based batteries: virtually no memory effect, free charging and discharging, a very low self-discharge rate, and high energy density.

[0005] These lithium-ion secondary batteries primarily use lithium oxide and carbon materials as the positive and negative electrode active materials, respectively. Furthermore, the lithium-ion secondary battery comprises an electrode assembly comprising positive and negative plates coated with the positive and negative electrode active materials, respectively, with a separator interposed between them, and an outer packaging material that seals and houses the electrode assembly together with an electrolyte.

[0006] Meanwhile, lithium-ion secondary batteries can be classified into pouch-type secondary batteries, in which the electrode assembly is housed in a pouch made of aluminum laminate sheet, and can-type secondary batteries, in which the electrode assembly is housed in a metal can, depending on the shape of the battery case. In addition, can-type secondary batteries can be further classified into cylindrical batteries and square batteries, depending on the shape of the metal can. These lithium-ion secondary batteries are assembled into a dense structure by overlapping or stacking multiple battery cells mounted on their own or in cartridges, etc., and then electrically connecting them to form a battery module or battery pack that can provide high voltage and high current.

[0007] Recently, research and development is actively underway on battery packs that consist of a single module or cell assembly with improved structural rigidity by standing and densely arranging multiple cylindrical battery cells, and a cell frame surrounding the single module or cell assembly.

[0008] Meanwhile, in a battery pack, multiple battery cells and busbars (or metal plates) can be electrically connected to each other via wires using a so-called wire bonding technique. If an event occurs in a battery cell, causing a high current exceeding the allowable current to flow, the wires in the battery pack can short-circuit, preventing the event from progressing. This function is called fusing.

[0009] However, conventional battery packs utilizing wire bonding and fusing have a problem: their allowable current is too low, making them difficult to use in electrical devices requiring high output current. Therefore, there is an urgent need for a battery pack that utilizes wire bonding to maintain the fusing function while also enabling high-output discharge.

[0010] The present invention was created in consideration of the above-described problems, and its primary purpose is to provide a battery pack and an electric device including the same, in which a connecting wire can smoothly perform a fusing function while also effectively performing high-power discharge.

[0011] The technical problems to be solved by the present invention are not limited to the problems described above, and other problems not mentioned will be clearly understood by those skilled in the art from the description of the invention described below.

[0012] A battery pack according to the present invention comprises: a plurality of battery cells having first electrodes and second electrodes; a cell frame supporting and accommodating the plurality of battery cells; a power bus bar arranged at the outermost end on one side of the cell frame and electrically connected to the battery cells in one direction by a plurality of connecting wires; and a power bus bar guide rib protruding to one side to guide the settling of the power bus bar, the power bus bar settling portion having the power bus bar settling, wherein one side of the power bus bar and one end of the power bus bar guide rib have the same height.

[0013] The connecting wire connected to the power bus bar can be bent twice.

[0014] The above power bus bar can be electrically connected to each of the second electrodes of the battery cells by a plurality of the above connecting wires.

[0015] The above power bus bar can be electrically connected to each of the first electrodes of the battery cells by a plurality of the above connecting wires.

[0016] The battery pack according to the present invention further includes a sub-bus bar that is arranged on the inside of the power bus bar on one side of the cell frame and is electrically connected to the battery cell in one direction and the other direction by a plurality of connecting wires, and one side of the power bus bar can be positioned higher than one side of the sub-bus bar.

[0017] The battery pack according to the present invention further includes a sub-busbar mounting portion on which the sub-busbar is mounted, wherein the power busbar and the sub-busbar have the same thickness, and one side of the power busbar mounting portion can be positioned higher than one side of the sub-busbar mounting portion.

[0018] The battery pack according to the present invention further includes a sub-busbar mounting portion on which the sub-busbar is mounted, one side of the sub-busbar mounting portion has the same height as one side of the power busbar mounting portion, and the power busbar may have a thickness greater than that of the sub-busbar.

[0019] The power bus bar may have a protruding region protruding toward the battery cell and a recessed region recessed toward the battery cell, and a protrusion formed in the protruding region protruding toward the first electrode may be formed, and an extension formed in the recessed region extending toward the first electrode may be formed.

[0020] The power bus bar has a protruding region protruding toward the battery cell and a recessed region recessed toward the battery cell, and an extension portion extending toward the second electrode may be formed in the protruding region.

[0021] The power bus bar may be extended in a direction other than the one direction, and may have an electrode exposure portion that exposes the first electrode or the second electrode to the outside at a longitudinal end of the power bus bar.

[0022] A battery pack according to the present invention comprises: a sub-bus bar disposed on one side of the cell frame inside the power bus bar and electrically connected to the battery cell in one direction and the other direction by a plurality of connecting wires; and a sub-bus bar guide rib protruding to one side to guide the installation of the sub-bus bar, and including a sub-bus bar installation portion on which the sub-bus bar is installed; and one side of the sub-bus bar and one end of the sub-bus bar guide rib may have the same height.

[0023] The connecting wire connected to the above sub-bus bar can be bent twice.

[0024] The above sub-bus bar may be electrically connected to the second electrode of each of the battery cells arranged on the one-way side by a plurality of the connecting wires, and may be electrically connected to the first electrode of each of the battery cells arranged on the other-way side by a plurality of the connecting wires.

[0025] The sub-bus bar may have a protruding region protruding toward the battery cell and a recessed region recessed toward the battery cell, and a protrusion formed in the protruding region protruding toward the first electrode may be formed, and an extension formed in the recessed region extending toward the first electrode may be formed.

[0026] The above sub-bus bar has a protruding region protruding toward the battery cell and a recessed region recessed toward the battery cell, and an extension portion extending toward the second electrode can be formed in the protruding region.

[0027] The above sub-bus bar may be extended in the one direction and the other direction, and may have an electrode exposure portion that exposes the first electrode or the second electrode to the outside at a longitudinal end of the sub-bus bar.

[0028] An electric device according to the present invention comprises at least one battery pack according to the present invention.

[0029] According to the present invention, a battery pack and an electric device including the same can be provided, in which a connecting wire can smoothly perform a fusing function while also effectively performing high-power discharge by a power bus bar and a power bus bar mounting portion.

[0030] In addition, a power bus bar can be electrically connected to specific electrodes of a battery cell by a plurality of connecting wires, thereby providing a battery pack and an electrical device including the same in which high-power discharge can be more effectively achieved.

[0031] In addition, due to the geometrical characteristics of the power busbar, a battery pack and an electric device including the same can be provided in which the length of a connecting wire connecting the power busbar and the battery cell can be further reduced.

[0032] In addition, when the inside of the cell frame is filled with resin, a battery pack and an electric device including the same can be provided that can effectively prevent the resin from overflowing to the outside of the cell frame by the power bus bar and the power bus bar mounting portion.

[0033] In addition, a battery pack and an electric device including the same can be provided, in which a connecting wire can smoothly perform a fusing function while also effectively performing high-power discharge by a sub-bus bar and a sub-bus bar mounting portion.

[0034] In addition, a sub-bus bar can be electrically connected to a specific electrode of a battery cell by a plurality of connecting wires, thereby providing a battery pack and an electrical device including the same in which high-power discharge can be more effectively achieved.

[0035] In addition, due to the geometrical characteristics of the sub-bus bar, a battery pack and an electrical device including the same can be provided in which the length of a connecting wire connecting the sub-bus bar and the battery cell can be further reduced.

[0036] In addition, the electrical connection structure of the connecting wire can be designed differently, thereby providing a battery pack and an electrical device including the same with improved versatility and compatibility.

[0037] The effects of the present invention are not limited to the effects described above, and effects not mentioned can be clearly understood by a person having ordinary skill in the art to which the present invention pertains from this specification and the attached drawings.

[0038] The following drawings attached to this specification illustrate preferred embodiments of the present invention, and together with the detailed description of the invention described below, serve to further understand the technical idea of ​​the present invention, and therefore, the present invention should not be interpreted as being limited to matters described in such drawings.

[0039] FIG. 1 is a perspective view showing the overall appearance of a battery pack according to one embodiment of the present invention.

[0040] Figure 2 is a perspective view showing an exploded view of a battery pack according to one embodiment of the present invention.

[0041] FIG. 3 is a perspective view showing a battery cell of a battery pack according to one embodiment of the present invention, enlarged separately.

[0042] Figure 4 is a plan view showing the overall appearance of a battery pack according to one embodiment of the present invention.

[0043] Figure 5 is a side cross-sectional view showing a part of the ⅠⅠ' cross-section shown in Figure 4.

[0044] Fig. 6 is a side cross-sectional view showing a portion where a power bus bar of a conventional battery pack is arranged.

[0045] Figure 7 is a plan view showing an enlarged view of area A shown in Figure 4.

[0046] Figure 8 is a plan view showing an enlarged view of the power bus bar portion of a conventional battery.

[0047] FIG. 9 is a plan view modified from FIG. 7 to explain a battery pack according to another embodiment of the present invention.

[0048] Figure 10 is a side cross-sectional view showing the ⅠⅠ' cross-section shown in Figure 4.

[0049] FIG. 11 is a cross-sectional side view of FIG. 10 modified to explain a battery pack according to a modified example of one embodiment of the present invention.

[0050] FIG. 12 is a plan view showing a power bus bar of a battery pack according to one embodiment of the present invention, enlarged separately.

[0051] Figure 13 is a perspective view showing an enlarged view of area B of Figure 12.

[0052] Fig. 14 is a side cross-sectional view showing the ⅡⅡ' cross-section shown in Fig. 4.

[0053] Figure 15 is a plan view showing an enlarged view of area C shown in Figure 4.

[0054] Figure 16 is a plan view showing an enlarged view of the sub-bus bar portion of a conventional battery.

[0055] FIG. 17 is a plan view modified from FIG. 15 to illustrate a battery pack according to another embodiment of the present invention.

[0056] Fig. 18 is a plan view showing a sub-bus bar of a battery pack according to one embodiment of the present invention, enlarged separately.

[0057] FIG. 19 is a drawing illustrating an electrical device according to one embodiment of the present invention.

[0058] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be noted that the terms and words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings. Based on the principle that the inventor can appropriately define the concepts of terms to best explain his or her invention, they should be interpreted in a way that conforms to the technical spirit of the present invention.

[0059] Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are only some of the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention, and it should be understood that there may be various equivalents and modified examples that can replace them at the time of this application.

[0060] FIG. 1 is a perspective view showing the overall appearance of a battery pack according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing the battery pack according to an embodiment of the present invention, FIG. 3 is an enlarged perspective view showing a battery cell of a battery pack according to an embodiment of the present invention, FIG. 4 is a plan view showing the overall appearance of a battery pack according to an embodiment of the present invention, FIG. 5 is a side cross-sectional view showing a part of the ⅠⅠ' cross-section shown in FIG. 4, and FIG. 6 is a side cross-sectional view showing a portion of a conventional battery pack where a power bus bar is arranged.

[0061] Hereinafter, a battery pack (10) according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 6. A battery pack (10) according to an embodiment of the present invention may include a plurality of battery cells (100), a cell frame (200), a power bus bar (300), a power bus bar mounting portion (210), and a power bus bar guide rib (211).

[0062] The battery pack (10) can be provided as a three-dimensional structure having a predetermined width and a predetermined length in the X-axis direction and the Y-axis direction, respectively, and a predetermined height in the Z-axis direction.

[0063] A plurality of battery cells (100) may be provided. The battery cells (100) may be provided as secondary batteries, and may be provided as cylindrical secondary batteries, pouch-type secondary batteries, or square secondary batteries. Hereinafter, in the present embodiment, it is described that the plurality of battery cells (100) are provided as cylindrical secondary batteries, but the present invention is not limited thereto, and it is obvious that pouch-type secondary batteries or square secondary batteries may be applied as the battery cells (100).

[0064] The battery cell (100) may include a first electrode (110) and a second electrode (120). The first electrode (110) and the second electrode (120) may have different polarities. For example, the first electrode (110) may have a positive electrode, and the second electrode (120) may have a negative electrode. Both the first electrode (110) and the second electrode (120) may be positioned on one side of the battery cell (100). For example, the first electrode (110) and the second electrode (120) may be positioned on the upper side or the +Z direction side of the battery cell (100). For example, the first electrode (110) may be placed at the upper center of the battery cell (100), and the second electrode (120) may be placed along the upper edge of the battery cell (100) to surround the first electrode (110).

[0065] The cell frame (200) may be configured to support and accommodate a plurality of battery cells (100). In the cell frame (200), the plurality of battery cells (100) may be arranged in a horizontal direction parallel to the XY plane while standing in the Z-axis direction. An empty space may be formed inside the cell frame (200) to support and accommodate the plurality of battery cells (100).

[0066] The power busbar (300) may be a busbar arranged at the outermost end on one side of the cell frame (200). For example, the power busbar (300) may be arranged on the upper side or the +Z direction side of the cell frame (200). For example, the power busbar (300) may be arranged on the -Y direction side on one side of the cell frame (200). For reference, a connection busbar (500) described below may be arranged on the +Y direction side of one side of the cell frame (200), and at least one sub busbar (400) described below may be arranged between the power busbar (300) and the connection busbar (500) described below.

[0067] The power bus bar (300) can be electrically connected to the battery cells (100) in one direction. For example, a plurality of battery cells (100) can be electrically connected to the +Y direction side of the power bus bar (300). The power bus bar (300) can be connected to a power terminal (310). The power terminal (310) can be, for example, a terminal arranged on the -Y direction side, and can be a so-called HV (High Voltage) terminal that can be electrically connected to an external electrical device requiring power. A relatively high output current can flow through the power bus bar (300).

[0068] The power bus bar (300) can be electrically connected to the battery cell (100) in one direction by a plurality of connecting wires (W). The connecting wires (W) can be welded and joined to the power bus bar (300) and the battery cell (100). The connecting wire (W) can include a conductive material. For example, the connecting wire (W) can be a wire including a metal material. Accordingly, in the battery pack (10) according to the present invention, a plurality of battery cells (100) and the power bus bar (300) can be electrically connected by a so-called wire bonding method. The connecting wire (W) can perform a fusing function. When a specific event occurs in the battery cell (100) and a high current exceeding a predetermined allowable current (hereinafter, fusing current) flows, the connecting wire (W) can be disconnected to prevent the battery cell (100) from proceeding with the specific event. This function can be referred to as a fusing function. Through the fusing function, the ignition of the battery cell (100) can be prevented. (Meanwhile, the above-described connecting wire (W) can also electrically connect the sub-bus bar (400) and the battery cell (100) described later, and the connecting bus bar (500) and the battery cell (100) described later.)

[0069] The power busbar mounting portion (210) may be configured to mount the power busbar (300). The power busbar (300) may be positioned at the outermost portion on one side of the cell frame (200) as described above, and the power busbar mounting portion (210) may be positioned at the outermost portion on one side of the cell frame (200). The power busbar mounting portion (210) may be a part of the cell frame (200). The power busbar mounting portion (210) may be provided as an integral part with the cell frame (200). The power busbar (300) may be mounted on the upper side or the +Z direction side of the power busbar mounting portion (210).

[0070] The power busbar mounting portion (210) may be provided with a power busbar guide rib (211). The power busbar guide rib (211) may protrude to one side from the power busbar mounting portion (210). For example, the power busbar guide rib (211) may protrude upward or in the +Z direction from the power busbar mounting portion (210). The power busbar guide rib (211) may protrude from at least a portion of an edge of the power busbar mounting portion (210).

[0071] One side of the power busbar (300) and one end of the power busbar guide rib (211) may have the same height. For example, the upper side of the power busbar (300) and the upper end of the power busbar guide rib (211) may have the same height. Specifically, in the cell frame (200), when the height to the upper side of the power busbar mounting portion (210) excluding the power busbar guide rib (211) is H1, the height of the power busbar guide rib (211) is h1, the thickness of the power busbar (300) is T1, and h1 and T1 are the same, the height of the upper end of the power busbar guide rib (211), h1 + H1, may be the same as the height of the upper side of the power busbar (300), T1 + H1.

[0072] The height (h1 + H1) of the upper end of the power busbar guide rib (211) and the height (T1 + H1) of the upper surface of the power busbar (300) may be formed higher than the height (H) of the upper end of the battery cell (100). That is, the power busbar (300) may be provided at a higher position than the battery cell (100). As a result, when resin is filled inside the battery pack (10), the resin can be prevented from overflowing from the battery pack (10).

[0073] The connecting wire (W) can be electrically connected to the battery cell (100) from the power bus bar (300) through the power bus bar guide rib (211). As previously discussed, the battery cell (100) may be positioned below the power bus bar (300), and if there is a height difference between the battery cell (100) and the power bus bar (300), the connecting wire (W) inevitably has to be bent. The length of the connecting wire (W) increases as the degree of bending (e.g., the bending angle) becomes more severe or the number of bends increases. If the length of the connecting wire (W) increases, the electrical resistance increases, which may make it vulnerable to high-power discharge.

[0074] In the case of a conventional battery pack, the height (h1' + H1') of one end of the power busbar guide rib (211') was higher than the height (T1' + H1') of one end of the power busbar (300'). This is because, when filling the inside of the cell frame (200') with resin, in order to prevent the resin from overflowing to the outside of the cell frame (200'), the height (h1' + H1') of one end of the power busbar guide rib (211') was developed to become increasingly higher, but in comparison, research and development on the power busbar mounting portion (210') and the power busbar (300') was relatively low. Accordingly, the connecting wire (W') of the conventional battery pack was bent relatively severely from the power bus bar (300') to the power bus bar guide rib (211') and to the battery cell (100'), and the number of bends was also high, so its length could not but be relatively long. In addition, when the connecting wire (W') is welded to the battery cell (100') and the power bus bar (300'), the length of the welding part had to be secured to a certain level or more, and there was a structural limitation in reducing the gap between the battery cell (100') and the power bus bar (300'), so the conventional battery pack had limitations in shortening the length of the connecting wire (W'). Therefore, the connecting wire (W') of the conventional battery pack had to be relatively long, and as a result, the electrical resistance was relatively high, so the size of the fusing current was relatively low. As a result, the conventional battery pack was not suitable for high-power discharge (see Fig. 6).

[0075] However, since the battery pack (10) according to the present invention has one side of the power bus bar (300) and one end of the power bus bar guide rib (211) at the same height, the degree and number of bends of the connecting wire (W) from the power bus bar (300) to the battery cell (100) through the power bus bar guide rib (211) can be minimized, thereby minimizing its length. In addition, the welding portion of the connecting wire (W) to the power bus bar (300) can be brought closer to the power bus bar guide rib, so that the length of the connecting wire (W) can be further minimized. As the length of the connecting wire (W) is minimized in this way, the electrical resistance of the connecting wire (W) can also be minimized, so that the battery pack (10) according to the present invention can be highly suitable for high-power discharge compared to a conventional battery pack. That is, the battery pack (10) according to the present invention has a remarkable advantage in that the size of the fusing current of the connecting wire (W) can be increased as the length of the connecting wire (W) is shortened, so that the connecting wire (W) can smoothly perform the fusing function while also effectively performing high-output discharge.

[0076] For example, in the case of a conventional battery pack, the minimum mass-produced length of a connecting wire (W') may be 10 mm, and such a 10 mm long connecting wire (W') may have a fusing current value of about 41.5 A. However, in the case of the battery pack (10) according to the present invention, under the same conditions as the thickness and material, the minimum mass-produced length of the connecting wire (W) may be shortened to 6 mm to 7 mm. When the length of the connecting wire (W) is 6 mm, the fusing current may be about 51.3 A, which is an increase of about 23.6% compared to the conventional one, and when the length of the connecting wire (W) is 7 mm, the fusing current may be about 56.2 A, which is an increase of about 35.4% compared to the conventional one. If an electric device requires a high-power discharge of 50 A or more, a conventional battery pack will be disconnected at a current lower than 50 A, but a battery pack according to the present invention can comfortably satisfy a high-power discharge of 50 A or more.

[0077] The connecting wire (W) connected to the power bus bar (300) can be bent twice. Specifically, it can be bent once at the power bus bar guide rib (211) side and once more at the part connected to the battery cell (100). The connecting wire (W) can be welded and joined to the power bus bar (300) and the battery cell (100). When the connecting wire (W) is bent twice as described above and connected to the power bus bar (300) and the battery cell (100), the length of the connecting wire (W) can be minimized.

[0078] In the case of a conventional battery pack, since the height (h1' + H1') of one end of the power busbar guide rib (211') was higher than the height (T1' + H1') of one side of the power busbar (300'), the connecting wire (W') was bent once from the power busbar (300') toward the power busbar guide rib (211'), once or twice on the power busbar guide rib (211') side, and once more on the battery cell (100'), and so was bent at least three or four times, and even when bent three times, the degree of bending was particularly severe on the power busbar guide rib (211') side, so that the length of the connecting wire (W') was inevitably increased.

[0079] However, since the connecting wire (W) of the battery pack (10) according to the present invention is bent only twice during the section from the power bus bar (300) to the battery cell (100) through the power bus bar guide rib (211), the length of the connecting wire (W) can be further minimized, so that high-power discharge of the battery pack (10) can be more effectively achieved.

[0080] Meanwhile, the connecting wire (W) can be welded to the battery cell (100), the sub-bus bar (400) described later, and the connecting bus bar (500) described later.

[0081]

[0082] Fig. 7 is a plan view showing an enlarged view of area A shown in Fig. 4, and Fig. 8 is a plan view showing an enlarged view of a power bus bar portion of a conventional battery.

[0083] Hereinafter, with reference to FIGS. 7 and 8, the power bus bar (300) of the battery pack (10) according to one embodiment of the present invention will be described in more detail.

[0084] The power bus bar (300) of the battery pack (10) according to one embodiment of the present invention may be electrically connected to the second electrodes (120) of each battery cell (100) by a plurality of connection wires (W). Specifically, the power bus bar (300) may electrically connect a plurality of battery cells (100) in one direction, and a plurality of connection wires (W) may be connected to the second electrodes (120) of each of the plurality of battery cells (100). For example, the second electrodes (120) of one battery cell (100) may be electrically connected to the power bus bar (300) by two connection wires (W), as illustrated in the drawing. All of the connection wires (W) may be connected to the second electrodes (120) from the power bus bar (300) through the power bus bar guide rib (211).

[0085] The two connecting wires (W) connected to the second electrode (120) of one battery cell (100) may be arranged relatively far apart from each other at different locations. The connecting wire (W) connecting the second electrode (120) and the power bus bar (300) of one of the two adjacent battery cells (100) and the connecting wire (W) connecting the second electrode (120) and the power bus bar (300) of the other battery cell (100) may be arranged relatively adjacent to each other.

[0086] In the case of a conventional battery pack, the power bus bar (300') was electrically connected to the second electrode (120') of each battery cell by one connecting wire (W'). This may be because the second electrode (120') had to be exposed in a narrow area due to a configuration such as a cell frame (200'). In addition, when designing the bus bar, the number or area of ​​the electrode exposure portions had to be limited in consideration of electrical resistance or temperature increase. However, in the case of the battery pack (10) according to the present invention, since a configuration such as the cell frame (200) is not arranged between the power bus bar (300) and the sub-bus bar (400) described below, not only can the second electrode (120) of the battery cell (100) be exposed in a much wider area, but also the second electrodes (120) of two adjacent battery cells (100) may both be exposed in a common area. Accordingly, a plurality of connection wires (W) can be easily connected to each second electrode (120) of each battery cell (100) (see FIG. 8).

[0087] In this way, when the power bus bar (300) is electrically connected to the second electrode (120) of each battery cell (100) by a plurality of connecting wires (W), the electrical resistance between the power bus bar (300) and the second electrode (120) can be significantly reduced compared to the case of a conventional battery pack in which the power bus bar (300) is electrically connected to the second electrode (120) of each battery cell (100) by one connecting wire (W). This is because the cross-sectional area of ​​the current path between the power bus bar (300) and the second electrode (120) increases. As a result, high-power discharge of the battery pack (10) can be achieved more effectively.

[0088] For example, assuming that the length of the connecting wires (W, W') is 10 mm, the fusing current of the connecting wire (W') connected to one battery cell, such as in a conventional battery pack, may be about 41.5 A. However, in the battery pack (10) according to the present invention, the fusing current of the connecting wires (W) connected to two battery cells (100) may be about 83.0 A, which is about twice that of the conventional battery.

[0089]

[0090] Meanwhile, in the battery pack (10) according to the present invention, as described above, the length of the connecting wire (W) may be shortened, and at the same time, a plurality of connecting wires (W) may be connected to each second electrode (120) of each battery cell (100).

[0091] For example, in the case of a conventional battery pack, if the length of the connecting wire (W') is 10 mm and one is connected to each battery cell, the fusing current of the connecting wire (W') may be 41.5 A. However, in the case of the battery pack (10) of the present invention, the length of the connecting wire (W) may be shortened to, for example, 8 mm, and two may be connected to each battery cell (100). In this case, the fusing current of the connecting wires (W) may be about 94.8 A, which is about 2.28 times that of the conventional one.

[0092]

[0093] FIG. 9 is a plan view modified from FIG. 7 to explain a battery pack according to another embodiment of the present invention.

[0094] Hereinafter, with reference to FIG. 9, a power bus bar (300) of a battery pack (10) according to another embodiment of the present invention will be described in detail.

[0095] The power bus bar (300) of the battery pack (10) according to another embodiment of the present invention can be electrically connected to the first electrode (110) of each battery cell (100) by a plurality of connection wires (W). In other words, compared to the battery pack (10) according to one embodiment of the present invention, only the arrangement and connection structure of the wires are different, and the remaining components such as the battery cell (100), the cell frame (200), the power bus bar (300), and the power bus bar mounting portion (210) can be configured as is. Specifically, the power bus bar (300) can electrically connect a plurality of battery cells (100) in one direction, and a plurality of connection wires (W) can be connected to the first electrodes (110) of each of the plurality of battery cells (100). For example, the first electrode (110) of one battery cell (100) can be electrically connected to the power bus bar (300) by two connecting wires (W), as shown in the drawing.

[0096] Two connecting wires (W) connected to the first electrode (110) of one battery cell (100) can be arranged adjacent to each other.

[0097] In this way, when the power bus bar (300) is electrically connected to the first electrode (110) of each battery cell (100) by a plurality of connecting wires (W), the electrical resistance between the power bus bar (300) and the first electrode (110) can be reduced compared to when the power bus bar (300) is electrically connected to the first electrode (110) of each battery cell (100) by one connecting wire (W). This is because the cross-sectional area of ​​the current path between the power bus bar (300) and the first electrode (110) increases. As a result, high-power discharge of the battery pack (10) can be achieved more effectively. In addition, as described above, by changing only the arrangement and connection structure of the connecting wire (W), the overall electrical connection structure of the battery pack (10) can be designed differently even if the remaining configurations remain the same, so that the overall electrical connection structure of the battery pack (10) can be changed very easily, and thus the versatility and compatibility of the battery pack (10) can be improved.

[0098]

[0099] FIG. 10 is a side cross-sectional view showing the ⅠⅠ' cross-section shown in FIG. 4, and FIG. 11 is a side cross-sectional view modified from FIG. 10 to explain a battery pack according to a modified example of one embodiment of the present invention.

[0100] Hereinafter, with reference to FIGS. 10 and 11, a battery pack (10) according to one embodiment of the present invention will be described in more detail.

[0101] A battery pack (10) according to one embodiment of the present invention may further include a sub-bus bar (400). The sub-bus bar (400) may be a bus bar arranged on the inner side of the power bus bar (300) on one side of the cell frame (200). For example, the sub-bus bar (400) may be arranged on the upper side or the +Z direction side of the cell frame (200). For example, the sub-bus bar (400) may be arranged between the power bus bar (300) and a connection bus bar (500) described below on one side of the cell frame (200). At least one sub-bus bar (400) may be provided.

[0102] The sub-bus bar (400) can be electrically connected to the battery cells (100) in one direction and the other direction. For example, a plurality of battery cells (100) can be electrically connected to each of the +Y direction side and the -Y direction side of the sub-bus bar (400). The plurality of battery cells (100) of the battery pack (10) are connected in series and parallel to each other by the sub-bus bar (400) and the connection bus bar (500) described below, and these plurality of battery cells (100) can be ultimately electrically connected to the power bus bar (300).

[0103] The sub-bus bar (400) can be electrically connected to the battery cell (100) in both directions by a plurality of connecting wires (W). The connecting wires (W) connected to the sub-bus bar (400) can be provided substantially identically to the connecting wires (W) connected to the power bus bar (300) described above. The connecting wires (W) connected to the sub-bus bar (400) can perform a fusing function, similar to the connecting wires (W) connected to the power bus bar (300).

[0104] One side of the power bus bar (300) may be positioned higher than one side of the sub bus bar (400). For example, the upper side of the power bus bar (300) may be positioned higher than the upper side of the sub bus bar (400).

[0105] In this way, when one side of the power bus bar (300) is positioned higher than one side of the sub bus bar (400), there is an advantage in that when resin is filled inside the battery pack (10), the resin can be prevented from overflowing from the inside of the battery pack (10) to the outermost side.

[0106]

[0107] In particular, referring to FIG. 10, the battery pack (10) according to one embodiment of the present invention may further include a sub-busbar mounting portion (220). The sub-busbar mounting portion (220) may be configured to mount a sub-busbar (400). The sub-busbar mounting portion (220) may be arranged on the inner side of the power busbar mounting portion (210) on one side of the cell frame (200). The sub-busbar mounting portion (220) may be a part of the cell frame (200). The sub-busbar mounting portion (220) may be provided as an integral part with the cell frame (200). The sub-busbar (400) may be mounted on the upper side or the +Z direction side of the sub-busbar mounting portion (220).

[0108] The power busbar (300) and the sub busbar (400) may have the same thickness. That is, the thickness (T1) of the power busbar (300) and the thickness (T2) of the sub busbar (400) may be the same. In addition, one side of the power busbar mounting portion (210) may be positioned higher than one side of the sub busbar mounting portion (220). For example, the height (H1) of the upper side of the power busbar mounting portion (210) may be positioned higher than the height (H2) of the upper side of the sub busbar mounting portion (220). As a result, the height (T1 + H1) of the upper side of the power busbar (300) may be greater than the height (T2 + H2) of the upper side of the sub busbar (400).

[0109] As described above, if the thickness of the power bus bar (300) and the sub bus bar (400) are the same, it is easy to manufacture the power bus bar (300) and the sub bus bar (400) at once with one plate, so that the productivity of the battery pack (10) can be improved.

[0110] Meanwhile, the sub-busbar mounting portion (220) may be provided with a sub-busbar guide rib (221). The sub-busbar guide rib (221) may protrude to one side from the sub-busbar mounting portion (220). For example, the sub-busbar guide rib (221) may protrude upward or in the +Z direction from the sub-busbar mounting portion (220). The sub-busbar guide rib (221) may protrude from at least a portion of an edge of the sub-busbar mounting portion (220).

[0111] In particular, referring to FIG. 11, a battery pack (10) according to a modified example of one embodiment of the present invention may have one side of the sub-busbar mounting portion (220) have the same height as one side of the power busbar mounting portion (210), but the power busbar (300) may have a greater thickness than the sub-busbar (400). For example, the height (H1) of the upper side of the power busbar mounting portion (210) may be the same as the height (H2) of the upper side of the sub-busbar mounting portion (220), and the thickness (T1) of the power busbar (300) may be greater than the thickness (T2) of the sub-busbar (400). As a result, the height (T1 + H1) of the upper side of the power busbar (300) may be greater than the height (T2 + H2) of the upper side of the sub-busbar (400).

[0112] As described above, when the power bus bar (300) has a greater thickness than the sub bus bar (400), the current pass cross-sectional area inside the power bus bar (300) increases, so that high-power discharge of the battery pack (10) can be achieved more effectively.

[0113]

[0114] Meanwhile, again, referring to FIGS. 1, 2, and 4, the connection bus bar (500) will be described in detail. The battery pack (10) according to the present invention may further include a connection bus bar (500). The connection bus bar (500) may be arranged at the outermost side of the cell frame (200) at a different location from the power bus bar (300). The connection bus bar (500) may be electrically connected to a plurality of battery cells (100) in one direction. The connection bus bar (500) and the battery cells (100) may be electrically connected to each other by a connection wire (W). The connection bus bar (500) may have a connection terminal (not shown) that may be electrically connected to another battery pack (10). The cell frame (200) may include a connection bus bar mounting portion (230) on which the connection bus bar (500) is mounted.

[0115]

[0116] FIG. 12 is a plan view showing a power bus bar of a battery pack according to one embodiment of the present invention in an enlarged manner, and FIG. 13 is a perspective view showing an enlarged area B of FIG. 12.

[0117] Hereinafter, with reference to FIGS. 12 and 13, the power bus bar (300) of the battery pack (10) according to one embodiment of the present invention will be described in more detail.

[0118] The power bus bar (300) may have a protruding region (320) and a recessed region (330). The protruding region (320) may be a region protruding toward the battery cell (100). Specifically, the protruding region (320) may be a region protruding toward the battery cell (100) connected to one direction (e.g., +Y direction) of the power bus bar (300). The recessed region (330) may be a region recessed toward the battery cell (100). Specifically, the recessed region (330) may be a region recessed toward the battery cell (100) connected to one direction of the power bus bar (300). The protruding region (320) and the recessed region (330) may be repeatedly formed on one side of the power bus bar (300).

[0119] A protrusion (321) may be formed in the protruding region (320). The protrusion (321) may be a portion protruding from the protruding region (320) toward the first electrode (110) of the battery cell (100). An expansion (331) may be formed in the recessed region (330). The expansion (331) may be a portion extending from the recessed region (330) toward the first electrode (110) of the battery cell (100).

[0120] Meanwhile, as previously described with reference to FIG. 7, the power bus bar (300) according to another embodiment of the present invention can be electrically connected to the first electrode (110) of the battery cell (100) by a connecting wire (W). In this case, when the protrusion (321) and the expansion (331) are formed on the power bus bar (300) as described above, the gap between the power bus bar (300) and the first electrode (110) can be reduced, and thus the length of the connecting wire (W) connecting the power bus bar (300) and the first electrode (110) can also be reduced. As a result, high-power discharge of the battery pack (10) can be achieved more effectively.

[0121] An extension portion (322) may be formed in the protruding area (320) of the power bus bar (300). The extension portion (322) may be a portion extending from the protruding area (320) toward the second electrode (120) of the battery cell (100). The extension portion (322) may be connected to the protrusion portion (321) and may be spaced apart from the extension portion (331). The power bus bar (300) according to one embodiment of the present invention may be electrically connected to the second electrode (120) of the battery cell (100) by a connection wire (W). At this time, when the extension portion (322) is formed in the power bus bar (300) as described above, the gap between the power bus bar (300) and the second electrode (120) may be reduced, and thus the length of the connection wire (W) connecting the power bus bar (300) and the second electrode (120) may also be reduced. As a result, high-power discharge of the battery pack (10) can be achieved more effectively.

[0122] The power bus bar (300) may have an electrode exposure portion (340). Specifically, the power bus bar (300) may be elongated in one direction and the other direction, and the electrode exposure portion (340) may expose the first electrode (110) or the second electrode (120) to the outside at the longitudinal end side of the power bus bar (300). For example, the power bus bar (300) may be elongated in the X-axis direction, and the electrode exposure portion (340) may be provided on at least one of the X-direction side ends of the power bus bar (300). The electrode exposure portion (340) may, for example, expose the second electrode (120) to the outside.

[0123] A power busbar guide rib (211) may be additionally arranged on the electrode exposure portion (340) side. A connection wire (W) may be connected from the power busbar (300) to the first electrode (110) or the second electrode (120) of the battery cell (100) exposed by the electrode exposure portion (340) through the power busbar guide rib (211). As described above, one end of the power busbar guide rib (211) described herein may have the same height as one side of the power busbar (300). In addition, the power busbar guide rib (211) described herein may prevent resin from overflowing when filling the resin into the battery pack (10).

[0124] As the electrode exposure portion (340) is provided on the power bus bar (300), a connection wire (W) can be additionally placed on the battery cell (100) connected to the outermost side (e.g., the outermost side in the X-axis direction), so that high-power discharge of the battery pack (10) can be achieved more easily.

[0125]

[0126] Fig. 14 is a side cross-sectional view showing the ⅡⅡ' cross-section shown in Fig. 4.

[0127] Hereinafter, with reference to FIG. 14, a sub-bus bar of a battery pack according to one embodiment of the present invention will be described in detail.

[0128] The sub-busbar mounting portion (220) may be provided with a sub-busbar guide rib (221). The sub-busbar guide rib (221) may protrude to one side from the sub-busbar mounting portion (220). For example, the sub-busbar guide rib (221) may protrude upward or in the +Z direction from the sub-busbar mounting portion (220). The sub-busbar guide rib (221) may protrude from at least a portion of an edge of the sub-busbar mounting portion (220).

[0129] One side of the sub-busbar (400) and one end of the sub-busbar guide rib (221) may have the same height. For example, the upper side of the sub-busbar (400) and the upper end of the sub-busbar guide rib (221) may have the same height. Specifically, in the cell frame (200), when the height to the upper side of the sub-busbar mounting portion (220) excluding the sub-busbar guide rib (221) is H2, the height of the sub-busbar guide rib (221) is h2, the thickness of the sub-busbar (400) is T2, and h2 and T2 are the same, the height of the upper end of the sub-busbar guide rib (221), h2 + H2, may be the same as the height of the upper side of the sub-busbar (400), T2 + H2.

[0130] When the sub-bus bar (400) and the sub-bus bar guide rib (221) are configured as described above, the connecting wire (W) can be connected at the shortest distance with minimal bending from the sub-bus bar (400) through the sub-bus bar guide rib (221) to the battery cell (100), and thus, the battery pack (10) according to the present invention can have the advantage that the connecting wire (W) can smoothly perform the fusing function while also effectively performing high-power discharge.

[0131] For example, the connecting wire of a conventional battery pack may have a length of 10 mm and a fusing current of about 41.5 A, but the connecting wire (W) of the battery pack (10) according to the present invention may have a length of 6 mm to 7 mm and a fusing current of about 51.3 A to about 56.2 A.

[0132] The connecting wire (W) connected to the sub-bus bar (400) can be bent twice. Specifically, it can be bent once at the sub-bus bar guide rib (221) side and once more at the part connected to the battery cell (100). In this case, the length of the connecting wire (W) connecting the sub-bus bar (400) and the battery cell (100) can be further minimized, thereby enabling high-power discharge of the battery pack (10) to be achieved more effectively.

[0133]

[0134] Fig. 15 is a plan view showing an enlarged view of the C area shown in Fig. 4, and Fig. 16 is a plan view showing an enlarged view of the sub-bus bar portion of a conventional battery.

[0135] Hereinafter, with reference to FIGS. 15 and 16, the sub-bus bar (400) of the battery pack (10) according to one embodiment of the present invention will be described in more detail.

[0136] The sub-bus bar (400) can be electrically connected to the second electrode (120) of each battery cell (100) disposed on one side by a plurality of connection wires (W). For example, the sub-bus bar (400) can be electrically connected to the second electrode (120) of each battery cell (100) disposed on the +Y direction by two connection wires (W). The sub-bus bar (400) can be electrically connected to the first electrode (110) of each battery cell (100) disposed on the other side by a plurality of connection wires (W). For example, the sub-bus bar (400) can be electrically connected to the first electrode (110) of each battery cell (100) disposed on the -Y direction by two connection wires (W).

[0137] In the case of a conventional battery pack, the sub-bus bar (400') was electrically connected to each electrode (110' or 120') of each battery cell by one connecting wire (W'). This may be because the electrode (110' or 120') had to be exposed in a narrow area due to a configuration such as a cell frame (200'). In addition, when designing the bus bar, the number or area of ​​the electrode exposure portion had to be limited in consideration of electrical resistance or temperature increase. However, in the case of the battery pack (10) according to the present invention, since a configuration such as the cell frame (200) is not arranged between the sub-bus bar (400) and the power bus bar (300) or between each sub-bus bar (400), not only can the electrode (110 or 120) of the battery cell (100) be exposed in a much wider area, but also the second electrodes (120) of two adjacent battery cells (100) may both be exposed in a common area. Accordingly, a plurality of connection wires (W) can be easily connected to each electrode (110 or 120) of each battery cell (100) (see FIG. 16).

[0138] In this way, when the sub-bus bar (400) is electrically connected to each battery by a plurality of connecting wires (W) on the one-way side and the other-way side, the cross-sectional area of ​​the current path between the sub-bus bar (400) and the battery cell (100) increases, so that the electrical resistance between the sub-bus bar (400) and the battery cell (100) can be reduced. As a result, high-power discharge of the battery pack (10) can be achieved more effectively.

[0139] For example, assuming that the length of the connecting wires (W, W') is 10 mm, the fusing current of the connecting wire (W') connected to one battery cell, such as in a conventional battery pack, may be about 41.5 A. However, in the battery pack (10) according to the present invention, the fusing current of the connecting wires (W) connected to two battery cells (100) may be about 83.0 A, which is about twice that of the conventional battery.

[0140]

[0141] Meanwhile, in the battery pack (10) according to the present invention, as described above, the length of the connecting wire (W) may be shortened, and at the same time, a plurality of connecting wires (W) may be connected to each electrode (110 or 120) of each battery cell (100).

[0142] For example, in the case of a conventional battery pack, if the length of the connecting wire (W') is 10 mm and one is connected to each battery cell, the fusing current of the connecting wire (W') may be 41.5 A. However, in the case of the battery pack (10) of the present invention, the length of the connecting wire (W) may be shortened to, for example, 8 mm, and two may be connected to each battery cell (100). In this case, the fusing current of the connecting wires (W) may be about 94.8 A, which is about 2.28 times that of the conventional one.

[0143]

[0144]

[0145] FIG. 17 is a plan view modified from FIG. 15 to illustrate a battery pack according to another embodiment of the present invention.

[0146] Hereinafter, with reference to FIG. 17, a sub-bus bar (400) of a battery pack (10) according to another embodiment of the present invention will be described in detail.

[0147] Meanwhile, in a battery pack (10) according to another embodiment of the present invention, as illustrated in FIG. 14, the first electrode (110) of each battery cell (100) disposed on one side (e.g., +Y direction) of the sub-bus bar (400) may be electrically connected to the sub-bus bar (400) by a plurality of connection wires (W). In addition, the second electrode (120) of each battery cell (100) disposed on the other side (e.g., -Y direction) of the sub-bus bar (400) may be electrically connected to the sub-bus bar (400) by a plurality of connection wires (W).

[0148]

[0149] Fig. 18 is a plan view showing a sub-bus bar of a battery pack according to one embodiment of the present invention, enlarged separately.

[0150] Hereinafter, with reference to FIG. 18, a sub-bus bar (400) according to one embodiment of the present invention will be described in more detail.

[0151] The sub-bus bar (400) may have a protruding region (410) and a recessed region (420). The protruding region (410) may be a region protruding toward the battery cell (100). Specifically, the protruding region (410) may be a region protruding toward the battery cell (100) connected to one direction (e.g., +Y direction) or the other direction (e.g., -Y direction) of the sub-bus bar (400). The recessed region (420) may be a region recessed toward the battery cell (100). Specifically, the recessed region (420) may be a region recessed toward the battery cell (100) connected to one direction or the other direction of the sub-bus bar (400). The protruding region (410) and the recessed region (420) may be repeatedly formed on the one-way and the other-way sides of the sub-bus bar (400), respectively.

[0152] A protrusion (411) may be formed in the protruding region (410). The protrusion (411) may be a portion protruding from the protruding region (410) toward the first electrode (110) of the battery cell (100). An expansion (421) may be formed in the recessed region (420). The expansion (421) may be a portion extending from the recessed region (420) toward the first electrode (110) of the battery cell (100).

[0153] As described above, when the sub-bus bar (400) has a protrusion (411) and an expansion (421), the gap between the first electrode (110) of the battery cell (100) and the sub-bus bar (400) can be reduced, and thus the length of the connecting wire (W) connecting the two can also be reduced, and thus high-power discharge of the battery pack (10) can be performed more effectively.

[0154] An extension portion (412) may be formed in the protruding area (410) of the sub-bus bar (400). The extension portion (412) may be a portion extending from the protruding area (410) toward the second electrode (120) of the battery cell (100). The extension portion (412) may be connected to the protrusion portion (411) and may be spaced apart from the extension portion (421). When the extension portion (412) is formed in the sub-bus bar (400), the gap between the sub-bus bar (400) and the second electrode (120) may be reduced, and thus the length of the connecting wire (W) connecting the two may also be reduced, thereby enabling high-power discharge of the battery pack (10) to be performed more effectively.

[0155] The sub-bus bar (400) may have an electrode exposure portion (430). Specifically, the sub-bus bar (400) may be elongated, and the electrode exposure portion (430) may expose the first electrode (110) or the second electrode (120) to the outside at an end side in the longitudinal direction (e.g., in the X-axis direction) of the sub-bus bar (400). For example, the electrode exposure portion (430) may expose the second electrode (120) to the outside at at least one of the X-axis direction ends of the sub-bus bar (400).

[0156] As the electrode exposure portion (430) is provided on the sub-bus bar (400), a connection wire (W) can be additionally placed on the battery cell (100) connected to the outermost side (e.g., the outermost side in the X-axis direction), so that high-power discharge of the battery pack (10) can be achieved more easily.

[0157]

[0158] Meanwhile, the cell frame (200) may further include a bottom plate (240) that forms a bottom to support a plurality of battery cells (100) (see FIG. 1).

[0159] Meanwhile, an edge portion (201) may be arranged on one edge of the cell frame (200). For example, an edge portion (201) may be arranged on the upper edge of the cell frame (200) so as to completely surround the cell frame (200) along the edge and protrude upwards by a predetermined height. By the edge portion (201), the resin filled inside the battery pack (10) can be prevented from overflowing to the outermost side of the battery pack (10) (see FIG. 4).

[0160]

[0161] Above, preferred examples of a battery pack (10) according to the present invention have been described. The technical concept of the present invention is not limited to these examples, and may include combinations of any two or more of them.

[0162]

[0163] Meanwhile, the battery pack (10) according to the present invention may further include various devices for controlling charging and discharging of battery cells (100), such as a BMS (Battery Management System), a current sensor, a fuse, etc., although not shown.

[0164]

[0165] FIG. 19 is a drawing illustrating an electrical device according to one embodiment of the present invention.

[0166] Hereinafter, referring to FIG. 19, the battery pack (10) according to the present invention can be applied to an electric device (V). The electric device (V) can operate by receiving power from the battery pack (10) according to the present invention. The electric device (V) can be a Light Electric Vehicle (LEV). Examples of LEVs include an e-motorcycle vehicle; an e-bike; an e-scooter; an electric golf cart, etc. The electric device (V) can also be an automobile, such as an electric car or a hybrid car.

[0167] In addition, it goes without saying that the battery pack (10) according to one embodiment of the present invention may be equipped not only with an electric device (V), but also with other devices, apparatuses, and facilities, such as an energy storage system that uses a secondary battery.

[0168]

[0169] In this specification, terms indicating directions such as up, down, left, right, front, and back are used, but these terms are only for convenience of explanation, and it is obvious to those skilled in the art that these terms may vary depending on the location of the target object or the location of the observer.

[0170] As described above, although the present invention has been described by limited embodiments and drawings, the present invention is not limited thereto, and various modifications and variations are possible by a person having ordinary skill in the art to which the present invention pertains within the scope of the technical idea of ​​the present invention and the equivalent scope of the patent claims to be described below.

[0171] [Explanation of symbols]

[0172] 10: Battery pack

[0173] 100: Battery Cell

[0174] 110: First electrode

[0175] 120: Second electrode

[0176] 200: Cell Frame

[0177] 201: Edge

[0178] 210: Power busbar mounting part

[0179] 211: Power busbar guide rib

[0180] 220: Sub-busbar mounting part

[0181] 221: Sub-busbar guide rib

[0182] 230: Connection bus bar mounting part

[0183] 240: Bottom Plate

[0184] 300: Power busbar

[0185] 310: Power terminal

[0186] 320: Protruding area

[0187] 321: Protrusion

[0188] 322: Extension

[0189] 330: Intrusion area

[0190] 331: Extension

[0191] 340: Electrode exposure area

[0192] 400: Sub bus bar

[0193] 410: Protruding area

[0194] 411: Protrusion

[0195] 412: Extension

[0196] 420: Intrusion area

[0197] 421: Extension

[0198] 430: Electrode exposure area

[0199] 500: Access bus bar

[0200] W: Wire

[0201] V: Electrical Device

Claims

1. A plurality of battery cells having a first electrode and a second electrode; A cell frame supporting and accommodating the plurality of battery cells; A power bus bar arranged at the outermost end on one side of the cell frame and electrically connected to the battery cell in one direction by a plurality of connecting wires; and It has a power busbar guide rib protruding to one side to guide the settling of the power busbar, and includes a power busbar settling portion on which the power busbar is settling, A battery pack characterized in that one side of the power bus bar and one end of the power bus bar guide rib have the same height.

2. In paragraph 1, The above connecting wire connected to the above power bus bar, A battery pack characterized by being folded twice.

3. In paragraph 1, The above power busbar, A battery pack characterized in that each of the second electrodes of the battery cells is electrically connected by a plurality of the connecting wires.

4. In paragraph 1, The above power busbar, A battery pack characterized in that each of the first electrodes of the battery cells is electrically connected by a plurality of the connecting wires.

5. In paragraph 1, Further comprising a sub-bus bar arranged on the inside of the power bus bar on one side of the cell frame and electrically connected to the battery cell in one direction and the other direction by a plurality of connecting wires, One side of the above power bus bar is, A battery pack characterized in that it is positioned higher than one side of the above sub-bus bar.

6. In paragraph 5, Further comprising a sub-busbar mounting portion on which the above sub-busbar is mounted, The above power busbar and the above sub busbar, have the same thickness, One side of the above power busbar mounting portion is A battery pack characterized in that it is positioned higher than one side of the above sub-bus bar mounting portion.

7. In paragraph 5, Further comprising a sub-busbar mounting portion on which the above sub-busbar is mounted, One side of the above sub-bus bar mounting portion is It has the same height as one side of the power bus bar mounting portion, The above power busbar, A battery pack characterized by having a thickness greater than that of the above sub-bus bar.

8. In paragraph 1, The above power busbar, It has a protruding region protruding toward the battery cell, and a recessed region recessed toward the battery cell, In the above protruding area, A protrusion is formed that protrudes toward the first electrode, In the above-mentioned area, A battery pack characterized in that an extension portion extending toward the first electrode is formed.

9. In paragraph 1, The above power busbar, It has a protruding region protruding toward the battery cell, and a recessed region recessed toward the battery cell, In the above protruding area, A battery pack characterized in that an extension portion extending toward the second electrode is formed.

10. In paragraph 1, The above power busbar, Extended in a direction other than the above one, A battery pack characterized in that it has an electrode exposure portion that exposes the first electrode or the second electrode to the outside at the longitudinal end side of the power bus bar.

11. In paragraph 1, A sub-bus bar arranged on the inside of the power bus bar on one side of the cell frame and electrically connected to the battery cell in one direction and the other direction by a plurality of connecting wires; and It has a sub-busbar guide rib protruding to one side to guide the settling of the sub-busbar, and includes a sub-busbar settling portion on which the sub-busbar is settling, A battery pack characterized in that one side of the sub-bus bar and one end of the sub-bus bar guide rib have the same height.

12. In paragraph 11, The above connecting wire connected to the above sub bus bar, A battery pack characterized by being folded twice.

13. In paragraph 11, The above sub-bus bar is, Each of the second electrodes of the battery cells arranged on the one-way side is electrically connected by a plurality of the connecting wires, A battery pack characterized in that each of the first electrodes of the battery cells arranged on the other side is electrically connected by a plurality of the connecting wires.

14. In paragraph 11, The above sub-bus bar is, It has a protruding region protruding toward the battery cell, and a recessed region recessed toward the battery cell, In the above protruding area, A protrusion is formed that protrudes toward the first electrode, In the above-mentioned area, A battery pack characterized in that an extension portion extending toward the first electrode is formed.

15. In paragraph 11, The above sub-bus bar is, It has a protruding region protruding toward the battery cell, and a recessed region recessed toward the battery cell, In the above protruding area, A battery pack characterized in that an extension portion extending toward the second electrode is formed.

16. In paragraph 11, The above sub-bus bar is, Extended in a direction different from the above one direction and the other direction, A battery pack characterized in that it has an electrode exposure portion that exposes the first electrode or the second electrode to the outside at the longitudinal end side of the sub-bus bar.

17. An electric device characterized by comprising at least one battery pack according to any one of claims 1 to 16.

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