Battery pack and electrical device including the same

Abstract

According to the present invention, the battery pack comprises: a plurality of battery cells having a first electrode and a second electrode; the battery cell frame is used for supporting and accommodating the plurality of battery cells; a power bus bar provided at an outermost region on one side of the cell frame, and electrically connected to the battery cell in one direction through a plurality of connection lines; and a power bus bar seating portion seating the power bus bar and having a power bus bar guide rib protruding to one side to guide seating of the power bus bar, one side surface of the power bus bar and an end portion of one side of the power bus bar guide rib may have the same height as each other.

Description

Technical Field

[0001] This disclosure relates to a battery pack and an electrical device including the battery pack, and more specifically, to a battery pack and an electrical device including the battery pack capable of performing stable high-power discharge while maintaining fuse function.

[0002] This application is based on and claims priority to Korean Patent Application No. 10-2024-0087647, filed with the Korean Intellectual Property Office on July 3, 2024, the disclosure of which is incorporated herein by reference in its entirety. Background Technology

[0003] In recent years, the demand for portable electronic products such as laptops, cameras, and mobile phones has increased rapidly, and the development of related technologies such as electric vehicles, energy storage batteries, robots, and satellites has accelerated. Therefore, active research is underway on high-performance rechargeable and rechargeable secondary batteries.

[0004] Currently, commercially available rechargeable batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, and lithium-ion batteries. Among them, lithium-ion batteries have attracted much attention due to their advantages of flexible charging and discharging, such as virtually no memory effect, extremely low self-discharge rate, and high energy density, compared to nickel-based batteries.

[0005] These lithium-ion secondary batteries typically use lithium-based oxides and carbon materials as the positive and negative electrode active materials, respectively. Furthermore, a lithium-ion secondary battery includes: an electrode assembly, wherein a positive electrode plate coated with the positive electrode active material and a negative electrode active material, respectively, are disposed with a separator therebetween; and a housing that sealably stores the electrode assembly and electrolyte.

[0006] Furthermore, based on the shape of the battery casing, lithium-ion secondary batteries can be divided into pouch-type secondary batteries, in which the electrode components are housed in a bag of aluminum laminates, and can-type secondary batteries, in which the electrode components are housed in a metal can. Additionally, based on the shape of the metal can, can-type secondary batteries can be further divided into cylindrical batteries and prismatic batteries. These lithium-ion secondary batteries are assembled into compact structures by overlapping or stacking multiple battery cells themselves or multiple battery cells mounted in a canister, and these structures can then be electrically connected to configure a battery module or battery pack.

[0007] Recently, research and development have been actively carried out on battery packs consisting of individual modules or cell assemblies and cell frames surrounding the individual modules or cell assemblies. Such battery packs improve structural rigidity by vertically and densely stacking multiple cylindrical battery cells.

[0008] Meanwhile, in a battery pack, multiple battery cells and busbars (or metal plates) can be electrically connected to each other via leads using a method known as wire bonding. When an event occurs in a battery cell and a high current flows exceeding the permissible current, the battery pack's leads can be disconnected to prevent the event from spreading within the battery cell; this function is called a fuse.

[0009] However, conventional battery packs manufactured using wire bonding and equipped with fuses have very low allowable current, making them unsuitable for use in electrical equipment requiring high power current. Therefore, there is an urgent need to develop a battery pack capable of high-power discharge while reliably maintaining fuse functionality through wire bonding. Summary of the Invention

[0010] Technical issues

[0011] This disclosure is designed to solve problems in related technologies. Therefore, this disclosure aims to provide a battery pack and an electrical device including the battery pack that can effectively perform high-power discharge while the connection wires smoothly perform the fuse function.

[0012] The technical problems to be solved by the present invention are not limited to those described above, and those skilled in the art will clearly understand from the following description of the present invention other problems not mentioned above.

[0013] Technical solution

[0014] In one aspect of this disclosure, a battery pack is provided, the battery pack comprising: a plurality of battery cells, the plurality of battery cells including a first electrode and a second electrode; a cell frame configured to support and accommodate the plurality of battery cells; a power busbar disposed on one side of the cell frame at an outermost region and electrically connected to the battery cells in one direction via a plurality of connecting lines; and a power busbar mounting portion including a power busbar guide rib projecting in one direction to guide the mounting of the power busbar, and configured such that the power busbar is mounted on the power busbar mounting portion, wherein one surface of the power busbar and one end of the power busbar guide rib may have the same height.

[0015] The connecting wire connected to the power busbar can be bent twice.

[0016] The power busbar can be electrically connected to the second electrode of each of the battery cells via the multiple connecting lines.

[0017] The power busbar can be electrically connected to the first electrode of each of the battery cells via the multiple connecting lines.

[0018] The battery pack according to this disclosure may further include a sub-busbar disposed on one side of the cell frame inside the power busbar and electrically connected to the battery cell in one and another direction via multiple connecting lines, wherein one surface of the power busbar may be positioned higher than one surface of the sub-busbar.

[0019] The battery pack according to this disclosure may further include a sub-busbar mounting portion, wherein the sub-busbar is mounted on the sub-busbar mounting portion, wherein the power busbar and the sub-busbar may have the same thickness, and one surface of the power busbar mounting portion may be positioned higher than one surface of the sub-busbar mounting portion.

[0020] The battery pack according to this disclosure may further include a sub-busbar mounting portion, the sub-busbar being mounted on the sub-busbar mounting portion, and one surface of the sub-busbar mounting portion may have the same height as one surface of the power busbar mounting portion, and the thickness of the power busbar may be greater than the thickness of the sub-busbar.

[0021] The power busbar may include a protruding region that protrudes toward the battery cell and a recessed region that is recessed toward the battery cell. A protruding portion that protrudes toward the first electrode may be formed in the protruding region, and an enlarged portion that expands toward the first electrode may be formed in the recessed region.

[0022] The power busbar may include a protruding region that protrudes toward the battery cell and a recessed region that is recessed toward the battery cell, and an extension that extends toward the second electrode may be formed in the protruding region.

[0023] The power busbar can be configured to extend in one direction and another direction, and can include an electrode exposure portion configured to expose the first electrode or the second electrode to the outside at a longitudinal end of the power busbar.

[0024] The battery pack according to this disclosure may include: a sub-busbar disposed on one side of the cell frame inside the power busbar and electrically connected to the battery cell in one and another direction via the plurality of connecting lines; and a sub-busbar mounting portion including a sub-busbar guide rib protruding in one direction to guide the mounting of the sub-busbar and configured such that the sub-busbar is mounted on the sub-busbar mounting portion, wherein one surface of the sub-busbar has the same height as one end of the sub-busbar guide rib.

[0025] The connecting line connected to the sub-busbar can be bent twice.

[0026] The sub-busbar can be electrically connected to the second electrode of each battery cell disposed on one side of it via the multiple connecting lines, and can also be electrically connected to the first electrode of each battery cell disposed on the other side of it via the multiple connecting lines.

[0027] The sub-busbar may include a protruding region that protrudes toward the battery cell and a recessed region that is recessed toward the battery cell. A protruding portion that protrudes toward the first electrode may be formed in the protruding region, and an enlarged portion that expands toward the first electrode may be formed in the recessed region.

[0028] The sub-busbar may include a protruding region that protrudes toward the battery cell and a recessed region that is recessed toward the battery cell, and an extension that extends toward the second electrode may be formed in the protruding region.

[0029] The sub-busbar can be configured to extend in one direction and another direction, and can include an electrode exposure portion configured to expose the first electrode or the second electrode to the outside at the longitudinal end of the sub-busbar.

[0030] In another aspect of this disclosure, an electrical device is provided, the electrical device comprising at least one battery pack according to this disclosure.

[0031] Beneficial effects

[0032] According to this disclosure, a battery pack capable of effectively performing high-power discharge while the connecting wires smoothly perform a fuse-breaking function by means of a power busbar and a power busbar mounting section, as well as an electrical device including the battery pack, can be provided.

[0033] Furthermore, since the power busbar is electrically connected to specific electrodes of the battery cell via multiple connecting lines, it can provide a battery pack capable of performing high-power discharge more efficiently, as well as electrical equipment including the battery pack.

[0034] In addition, a battery pack and electrical equipment including the battery pack can be provided that can further reduce the length of the connecting wires connecting the power busbar and the battery cell according to the characteristic shape of the power busbar.

[0035] In addition, a battery pack and an electrical device comprising the battery pack can be provided that can effectively prevent resin from overflowing to the outside of the cell frame when filling the inside of the cell frame with resin through the power busbar and the power busbar mounting part.

[0036] In addition, a battery pack that effectively performs a fuse function through the connecting line while effectively performing a high-power discharge through the sub-busbar and the sub-busbar mounting part, as well as an electrical device including the battery pack, can be provided.

[0037] Furthermore, since the sub-busbars are electrically connected to specific electrodes of the battery cells via multiple connecting lines, it is possible to provide a battery pack capable of performing high-power discharge more efficiently, as well as electrical equipment including the battery pack.

[0038] In addition, a battery pack and electrical equipment including the battery pack can be provided that can further reduce the length of the connecting wires connecting the sub-busbars and the battery cells due to the characteristic shape of the sub-busbars.

[0039] Furthermore, since the electrical connection structure of the connecting wires can be designed differently, battery packs with improved versatility and compatibility, as well as electrical devices including such battery packs, can be provided.

[0040] The effects achievable by this disclosure are not limited to those described above, and other effects not mentioned above will be clearly understood by those skilled in the art based on the description of the invention below. Attached Figure Description

[0041] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the foregoing disclosure, serve to provide a further understanding of the technical features of the present disclosure; therefore, the present disclosure is not to be construed as limited to the drawings.

[0042] Figure 1 This is an overall perspective view showing a battery pack according to an embodiment of the present disclosure.

[0043] Figure 2 This is an exploded perspective view showing a battery pack according to an embodiment of the present disclosure.

[0044] Figure 3 This is an enlarged perspective view showing the battery cells of a battery pack according to an embodiment of the present disclosure.

[0045] Figure 4 This is an overall plan view showing a battery pack according to an embodiment of the present disclosure.

[0046] Figure 5 It shows along Figure 4 A cross-sectional view of the portion intercepted by line I-I' in the diagram.

[0047] Figure 6 This is a cross-sectional view showing the portion of a conventional battery pack equipped with power busbars.

[0048] Figure 7 It is shown Figure 4 An enlarged plan view of region A shown.

[0049] Figure 8 This is an enlarged plan view showing the power busbar of a conventional battery.

[0050] Figure 9 This illustrates a battery pack used to explain another embodiment of the present disclosure. Figure 7 The floor plan with modified configuration.

[0051] Figure 10 It is along Figure 4 The cross-sectional view taken by line I-I' is shown.

[0052] Figure 11 This is a battery pack illustrating a modified example for explaining embodiments according to this disclosure. Figure 10 A cross-sectional view showing the modified configuration in the diagram.

[0053] Figure 12 This is an enlarged plan view showing the power busbars of a battery pack according to an embodiment of the present disclosure.

[0054] Figure 13 It is shown Figure 12 A magnified 3D view of region B in the image.

[0055] Figure 14 It is along Figure 4 The cross-sectional view taken from line II-II' is shown.

[0056] Figure 15 It is shown Figure 4 An enlarged plan view of region C shown.

[0057] Figure 16 This is an enlarged plan view showing the sub-busbars of a conventional battery.

[0058] Figure 17 This illustrates a battery pack used to explain another embodiment of the present disclosure. Figure 15 The floor plan with modified configuration.

[0059] Figure 18 This is an enlarged plan view showing the sub-busbars of a battery pack according to an embodiment of the present disclosure.

[0060] Figure 19 This is a diagram illustrating an electrical device according to an embodiment of the present disclosure. Detailed Implementation

[0061] The preferred embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terminology used in the specification and appended claims should not be construed as limited to its general and dictionary meanings, but should be interpreted according to the meanings and concepts corresponding to the technical aspects of this disclosure, based on the principle that inventors are allowed to appropriately define terms for best interpretation.

[0062] Therefore, the description presented herein is merely a preferred example for illustrative purposes and does not represent the full scope of this disclosure. It should be understood that other equivalents and modifications may be made thereto without departing from the scope of this disclosure.

[0063] Figure 1 This is an overall perspective view showing a battery pack according to an embodiment of the present disclosure. Figure 2 This is an exploded perspective view showing a battery pack according to an embodiment of the present disclosure. Figure 3 This is an enlarged perspective view showing the battery cells of a battery pack according to an embodiment of the present disclosure. Figure 4 This is an overall plan view showing a battery pack according to an embodiment of the present disclosure. Figure 5 It shows along Figure 4 A cross-sectional view of the portion intercepted by line I-I' in the diagram, and Figure 6 This is a cross-sectional view showing the portion of a conventional battery pack equipped with power busbars.

[0064] In the following text, reference will be made to Figures 1 to 6 A battery pack 10 according to an embodiment of the present disclosure is described in detail. The battery pack 10 according to an embodiment of the present disclosure may include a plurality of battery cells 100, a cell frame 200, a power busbar 300, a power busbar mounting portion 210, and a power busbar guide rib 211.

[0065] The battery pack 10 can be configured as a three-dimensional structure having a predetermined width and length in the X-axis and Y-axis directions, and a predetermined height in the Z-axis direction.

[0066] Multiple battery cells 100 may be provided. Each battery cell 100 is a secondary battery and may be configured as a cylindrical secondary battery, a pouch-type secondary battery, or a prismatic secondary battery. In the following description, although the multiple battery cells 100 are described as cylindrical secondary batteries in this embodiment, this disclosure is not limited thereto, and pouch-type or prismatic secondary batteries may also be used with the battery cells 100.

[0067] 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 polarity, and the second electrode 120 may have a negative polarity. Both the first electrode 110 and the second electrode 120 may be located on one side of the battery cell 100. For example, the first electrode 110 and the second electrode 120 may be disposed on the upper side or the +Z axis direction side of the battery cell 100. For example, the first electrode 110 may be disposed at the upper center of the battery cell 100, and the second electrode 120 may be disposed along the upper edge of the battery cell 100 to surround the first electrode 110.

[0068] The cell frame 200 can be configured to support and store multiple battery cells 100. Within the cell frame 200, the multiple battery cells 100 can be erected vertically in the Z-axis direction while being arranged horizontally in a direction parallel to the XY plane. Empty spaces can be formed within the cell frame 200 to support and store the multiple battery cells 100.

[0069] The power busbar 300 may be a busbar disposed in the outermost region of the cell frame 200. For example, the power busbar 300 may be disposed on the upper side or the +Z axis side of the cell frame 200. For example, the power busbar 300 may be disposed on one side of the cell frame 200 in a portion biased toward the -Y axis direction. For reference, the connecting busbar 500, which will be described later, may be disposed on one side of the cell frame 200 in a portion biased toward the +Y axis direction, and at least one sub-busbar 400, which will be described later, may be disposed between the power busbar 300 and the connecting busbar 500.

[0070] The power busbar 300 can be electrically connected to the battery cell 100 in one direction. For example, multiple battery cells 100 can be electrically connected to the +Y axis side of the power busbar 300. The power busbar 300 can be connected to a power terminal 310. The power terminal 310 can be, for example, a terminal located on the Y axis side, or it can be a so-called HV (high voltage) terminal that can be electrically connected to external electrical equipment that requires power. Relatively high power current can flow in the power busbar 300.

[0071] The power busbar 300 can be electrically connected to the battery cell 100 in one direction via multiple connecting wires W. The connecting wires W can be soldered to the power busbar 300 and the battery cell 100. The connecting wires W can include conductive materials. For example, the connecting wires W can be wires comprising metallic materials. Therefore, in the battery pack 10 according to this disclosure, multiple battery cells 100 and the power busbar 300 can be electrically connected via a so-called wire bonding method. The connecting wires W can perform a fuse function. When a specific event occurs in the battery cell 100 and a high current flows exceeding a predetermined permissible current (hereinafter, the fuse current), the connecting wires W can disconnect to prevent the battery cell 100 from continuing the specific event; this can be referred to as the fuse function. The fuse function prevents the battery cell 100 from catching fire. Simultaneously, the connecting wires W can electrically connect the sub-busbar 400 (described below) and the battery cell 100, and electrically connect the connecting busbar 500 (described below) and the battery cell 100.

[0072] The power busbar mounting section 210 can be configured such that the power busbar 300 is mounted on it. As described above, the power busbar 300 can be disposed in the outermost region of the cell frame 200, and the power busbar mounting section 210 can also be disposed in the outermost region of the cell frame 200. The power busbar mounting section 210 can be a part of the cell frame 200. The power busbar mounting section 210 can be integrally formed with the cell frame 200. The power busbar 300 can be mounted on the power busbar mounting section 210 from above or from the +Z axis direction side.

[0073] The power busbar mounting portion 210 may have a power busbar guide rib 211. The power busbar guide rib 211 may protrude from the power busbar mounting portion 210 in one direction. For example, the power busbar guide rib 211 may protrude upward from the power busbar mounting portion 210 or along the +Z axis direction. The power busbar guide rib 211 may protrude from at least a portion of the edge of the power busbar mounting portion 210.

[0074] One surface of the power busbar 300 and one end of the power busbar guide rib 211 can have the same height. For example, the upper surface of the power busbar 300 and the upper end of the power busbar guide rib 211 can have the same height. Specifically, in the cell frame 200, when the height of the upper surface 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, and the thickness of the power busbar 300 is T1, and h1 and T1 are equal, then h1 + H1 (which is the height of the upper end of the power busbar guide rib 211) can be equal to T1 + H1 (which is the height of the upper surface of the power busbar 300).

[0075] 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 can be configured to be greater than the height H of the upper end of the battery cell 100. That is, the power busbar 300 can be positioned higher than the battery cell 100. This prevents resin from overflowing from the battery pack 10 when the interior of the battery pack 10 is filled with resin.

[0076] The connecting wire W can be electrically connected from the power busbar 300 to the battery cell 100 via the power busbar guide rib 211. As mentioned above, the battery cell 100 can be positioned below the power busbar 300, and in this case, when there is a height difference between the battery cell 100 and the power busbar 300, the connecting wire W inevitably has to be bent. The length of the connecting wire W increases with the degree of bending (e.g., the bending angle) or the number of bends. As the length of the connecting wire W increases, the resistance increases, which may make it susceptible to high-power discharge.

[0077] In conventional battery packs, the height (h1'+H1') of one end of the power busbar guide rib 211' is greater than the height (T1'+H1') of one surface of the power busbar 300'. This is because conventional battery packs are developed with an increased height (h1'+H1') at one end of the power busbar guide rib 211' to prevent resin from overflowing to the outside of the cell frame 200' when the inside of the cell frame 200' is filled with resin. However, research and development on the power busbar mounting section 210' and the power busbar 300' have not been satisfactory. Therefore, the connecting wire W' of conventional battery packs, via the power busbar guide rib 211', is severely bent from the power busbar 300' to the battery cell 100', and the number of bends (referring to the part pointed to by B') is relatively large, thus requiring a relatively long length. Furthermore, when welding the connecting wire W' to the battery cell 100' and the power busbar 300', the length of the welding area must be ensured to be at a certain level or longer, and there are structural limitations on reducing the gap between the battery cell 100' and the power busbar 300'. Therefore, conventional battery packs have limitations on shortening the length of the connecting wire W'. Consequently, the connecting wire W' in conventional battery packs must be relatively long, resulting in increased resistance and therefore a lower fusing current. Therefore, conventional battery packs are not suitable for high-power discharge (see...). Figure 6 ).

[0078] However, in the battery pack 10 according to this disclosure, since one surface of the power busbar 300 and one end of the power busbar guide rib 211 have the same height, the degree and number of bends of the connecting line W from the power busbar 300 to the battery cell 100 via the power busbar guide rib 211 (refer to the portion indicated by B) can be minimized, and thus its length can be minimized. Furthermore, since the welded portion of the connecting line W to the power busbar 300 can be closer to the power busbar guide rib, the length of the connecting line W can be further minimized. Because the length of the connecting line W is minimized as described above, the resistance of the connecting line W can also be minimized, making the battery pack 10 according to this disclosure highly suitable for high-power discharge compared to conventional battery packs. That is, the battery pack 10 according to this disclosure can have an increased fusing current in the connecting line W corresponding to the shortened length of the connecting line W, thereby providing the significant advantage of effectively performing high-power discharge while smoothly performing the fusing function of the connecting line W.

[0079] For example, in conventional battery packs, the minimum length of the mass-produced connecting wire W' can be 10 mm, and the fusing current of a 10 mm long connecting wire W' can be approximately 41.5 A. However, in the battery pack 10 according to this disclosure, under the same thickness, materials, and other conditions, the minimum length of the mass-produced connecting wire W can be reduced to 6 mm to 7 mm. When the length of the connecting wire W is 6 mm, the fusing current can be approximately 51.3 A, an increase of approximately 23.6% compared to the conventional fusing current; while when the length of the connecting wire W is 7 mm, the fusing current can be approximately 56.2 A, an increase of approximately 35.4% compared to the conventional fusing current. If the electrical equipment requires a high-power discharge of 50 A or greater, a conventional battery pack will disconnect at a current below 50 A, but the battery pack according to this disclosure can comfortably meet a high-power discharge of 50 A or greater.

[0080] The connecting wire W to the power busbar 300 can be bent twice. Specifically, it can be bent once at the power busbar guide rib 211 and again in the section connecting to the battery cell 100. The connecting wire W can be soldered to both the power busbar 300 and the battery cell 100. When the connecting wire W is bent twice as described above and connected to both the power busbar 300 and the battery cell 100, the length of the connecting wire W can be minimized.

[0081] In conventional battery packs, because the height (h1'+H1') of one end of the power busbar guide rib 211' is greater than the height (T1'+H1') of one surface of the power busbar 300', the connecting wire W' bends at least three or four times. For example, it bends once from the power busbar 300' toward the power busbar guide rib 211', once or twice at the power busbar guide rib 211', and once at the battery cell 100'. Even when the connecting wire W' bends three times, the degree of bending on the side of the power busbar guide rib 211' is particularly severe, inevitably increasing the length of the connecting wire W'.

[0082] However, since the connection line W of the battery pack 10 according to this disclosure only bends twice in the section from the power busbar 300 through the power busbar guide rib 211 to the battery cell 100, the length of the connection line W can be further minimized, so that high-power discharge of the battery pack 10 can be performed more efficiently.

[0083] Meanwhile, the connecting wire W can be soldered to the battery cell 100, the sub-busbar 400 described below, and the connecting busbar 500 described below.

[0084] Figure 7 It is shown Figure 4 An enlarged plan view of region A is shown, and Figure 8 This is an enlarged plan view showing the power busbar of a conventional battery.

[0085] In the following text, reference will be made to Figure 7 and Figure 8 The power busbar 300 of the battery pack 10 according to an embodiment of the present disclosure will be described in more detail.

[0086] According to embodiments of this disclosure, the power busbar 300 of the battery pack 10 can be electrically connected to the second electrode 120 of each battery cell 100 via multiple connecting wires W. Specifically, the power busbar 300 can be electrically connected to multiple battery cells 100 in one direction, and the multiple connecting wires W can be connected to the corresponding second electrode 120 of the multiple battery cells 100. For example, as shown, the second electrode 120 of each battery cell 100 can be electrically connected to the power busbar 300 via two connecting wires W. All connecting wires W can be connected from the power busbar 300 to the second electrode 120 via the power busbar guide rib 211.

[0087] The two connecting lines W that connect to the second electrode 120 of each battery cell 100 can be arranged at different locations and relatively far apart from each other. The connecting line W that connects the second electrode 120 of one of two adjacent battery cells 100 to the power busbar 300 can be arranged adjacent to the connecting line W that connects the second electrode 120 of the other battery cell 100 to the power busbar 300.

[0088] In conventional battery packs, the power busbar 300' is electrically connected to the second electrode 120' of each battery cell via a connecting wire W'. This is due to the fact that the second electrode 120' must be exposed in a narrow area due to a construction such as the cell frame 200'. Furthermore, when designing the busbar, the number or area of ​​exposed electrode portions must be limited considering increases in resistance or temperature. However, in the case of the battery pack 10 according to this disclosure, since a construction such as the cell frame 200 is not provided between the power busbar 300 and the sub-busbar 400 (which will be described later), not only can the second electrode 120 of the battery cell 100 be exposed over a wider area, but all the second electrodes 120 of two adjacent battery cells 100 can also be exposed in a common area. Therefore, multiple connecting wires W can be easily connected to the second electrodes 120 of the battery cell 100 respectively (see...). Figure 8 ).

[0089] As described above, when the power busbar 300 is electrically connected to each second electrode 120 of the battery cell 100 via multiple connecting lines W, the resistance between the power busbar 300 and the second electrode 120 can be significantly reduced compared to a conventional battery pack where the power busbar 300 is electrically connected to each second electrode 120 of the battery cell 100 via a single connecting line W. This is due to the increased cross-sectional area of ​​the current path between the power busbar 300 and the second electrode 120. Therefore, high-power discharge of the battery pack 10 can be performed more efficiently.

[0090] For example, assuming the length of connecting wire W or connecting wire W' is 10 mm, in a conventional battery pack where one of the connecting wires W' is connected to each battery cell, the fusing current of connecting wire W' can be approximately 41.5 A. However, in the battery pack 10 of this disclosure where two of the connecting wires W are connected to each battery cell 100, the fusing current can be approximately 83.0 A, which is approximately twice the fusing current of the conventional type.

[0091] In the battery pack 10 according to this disclosure, the length of the connecting wires W can be shortened as described above, and multiple connecting wires W can be connected to each second electrode 120 of the battery cell 100.

[0092] For example, in a conventional battery pack, with each battery cell connected to a 10mm long connecting wire W', the fusing current of the connecting wire W' can be 41.5A. However, in the battery pack 10 of this disclosure, the length of the connecting wire W can be shortened to, for example, 8mm, and each battery cell 100 can be connected to two connecting wires W. In this case, the fusing current of the connecting wire W can be approximately 94.8A, which is approximately 2.28 times the fusing current of a conventional connecting wire.

[0093] Figure 9 This illustrates a battery pack used to explain another embodiment of the present disclosure. Figure 7 The floor plan with modified configuration.

[0094] In the following text, reference will be made to Figure 9 A detailed description of the power busbar 300 of the battery pack 10 according to another embodiment of the present disclosure.

[0095] According to another embodiment of the present disclosure, the power busbar 300 of the battery pack 10 can be electrically connected to each first electrode 110 of the battery cell 100 via multiple connecting lines W. In other words, compared to the battery pack 10 according to the embodiment of the present disclosure, except for the arrangement and connection structure of the connecting lines, other components such as the battery cell 100, cell frame 200, power busbar 300, and power busbar mounting portion 210 can be configured in the same manner. Specifically, the power busbar 300 can be electrically connected to multiple battery cells 100 in one direction, and the multiple connecting lines W can be connected to the first electrode 110 of each of the multiple battery cells 100. For example, as shown, the first electrode 110 of each battery cell 100 can be electrically connected to the power busbar 300 via two connecting lines W.

[0096] The two connecting lines W connected to the first electrode 110 of each battery cell 100 can be arranged adjacent to each other.

[0097] As described above, when the power busbar 300 is electrically connected to the first electrode 110 of each battery cell 100 via multiple connecting lines W, the resistance between the power busbar 300 and the first electrode 110 can be reduced compared to when the power busbar 300 is electrically connected to the first electrode 110 of each battery cell 100 via a single connecting line W. This is because the cross-sectional area of ​​the current path between the power busbar 300 and the first electrode 110 is increased. Therefore, high-power discharge of the battery pack 10 can be performed more efficiently. Furthermore, as described above, the overall electrical connection structure of the battery pack 10 can be designed differently by only changing the arrangement and connection structure of the connecting lines W while keeping the rest of the configuration. This allows for very easy modification of the overall electrical connection structure of the battery pack 10, thereby improving the versatility and compatibility of the battery pack 10.

[0098] Figure 10 It is along Figure 4 The cross-sectional view taken by line I-I' is shown, and Figure 11 It is shown Figure 10 The modified cross-sectional view of the configuration is shown to explain the modified example of the battery pack according to the embodiments of this disclosure.

[0099] In the following text, reference will be made to Figure 10 and Figure 11 The battery pack 10 according to embodiments of the present disclosure will be described in more detail.

[0100] The battery pack 10 according to embodiments of this disclosure may further include sub-busbars 400. Sub-busbars 400 may be disposed on one side of the cell frame 200, inside the power busbar 300. For example, sub-busbars 400 may be disposed on the upper side or the +Z axis direction side of the cell frame 200. For example, sub-busbars 400 may be disposed on one side of the cell frame 200 between the power busbar 300 and the connecting busbar 500, which will be described later. One or more sub-busbars 400 may be provided.

[0101] Sub-busbar 400 can be electrically connected to battery cells 100 in one direction and another. For example, multiple battery cells 100 can be electrically connected to the +Y-axis side and the -Y-axis side of sub-busbar 400, respectively. Multiple battery cells 100 of battery pack 10 can be connected in series and in parallel with each other through sub-busbar 400 and connecting busbar 500 described later, and multiple battery cells 100 can ultimately be electrically connected to power busbar 300.

[0102] The sub-busbar 400 can be electrically connected to the battery cell 100 in both directions via multiple connecting wires W. The connecting wires W connected to the sub-busbar 400 can be configured to be substantially the same as the connecting wires W connected to the power busbar 300 described above. The connecting wires W connected to the sub-busbar 400 can perform a fuse function, similar to the connecting wires W connected to the power busbar 300.

[0103] One surface of the power busbar 300 can be positioned higher than one surface of the sub-busbar 400. For example, the upper surface of the power busbar 300 can be positioned higher than the upper surface of the sub-busbar 400.

[0104] As described above, when one surface of the power busbar 300 is positioned higher than one surface of the sub-busbar 400, there is an advantage that when the interior of the battery pack 10 is filled with resin, the resin can be prevented from overflowing from the interior of the battery pack 10 to the outermost region.

[0105] Specifically, refer to Figure 10According to embodiments of the present disclosure, the battery pack 10 may further include a sub-busbar mounting portion 220. The sub-busbar mounting portion 220 may be configured such that a sub-busbar 400 is mounted on it. The sub-busbar mounting portion 220 may be disposed on one side of the cell frame 200, inside the power busbar mounting portion 210. The sub-busbar mounting portion 220 may be part of the cell frame 200. The sub-busbar mounting portion 220 may be configured to be integral with the cell frame 200. The sub-busbar 400 may be mounted on the sub-busbar mounting portion 220 from above or from the +Z axis direction side.

[0106] The power busbar 300 and the sub-busbar 400 can have the same thickness. That is, the thickness T1 of the power busbar 300 and the thickness T2 of the sub-busbar 400 can be the same. Furthermore, one surface of the power busbar mounting portion 210 can be positioned higher than one surface of the sub-busbar mounting portion 220. For example, the height H1 of the upper surface of the power busbar mounting portion 210 can be greater than the height H2 of the upper surface of the sub-busbar mounting portion 220. Therefore, the height (T1+H1) of the upper surface of the power busbar 300 can be greater than the height (T2+H2) of the upper surface of the sub-busbar 400.

[0107] As described above, if the thickness of the power busbar 300 and the sub-busbar 400 are the same, it is easy to manufacture the power busbar 300 and the sub-busbar 400 at once using a single board, thereby improving the productivity of the battery pack 10.

[0108] Simultaneously, the sub-busbar mounting portion 220 may include a sub-busbar guide rib 221. The sub-busbar guide rib 221 may protrude from the sub-busbar mounting portion 220 in one direction. For example, the sub-busbar guide rib 221 may protrude upward from the sub-busbar mounting portion 220 or along the +Z axis direction. The sub-busbar guide rib 221 may protrude from at least a portion of the edge of the sub-busbar mounting portion 220.

[0109] Specifically, refer to Figure 11 In the battery pack 10 of the modified example according to the embodiments of the present disclosure, one surface of the sub-busbar mounting portion 220 may have the same height as one surface of the power busbar mounting portion 210, and the power busbar 300 may have a greater thickness than the sub-busbar 400. For example, the height H1 of the upper surface of the power busbar mounting portion 210 may be the same as the height H2 of the upper surface 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. Therefore, the height (T1+H1) of the upper surface of the power busbar 300 may be greater than the height (T2+H2) of the upper surface of the sub-busbar 400.

[0110] As described above, when the thickness of the power busbar 300 is greater than the thickness of the sub-busbar 400, the cross-sectional area of ​​the current path inside the power busbar 300 can be increased, thereby enabling more efficient high-power discharge of the battery pack 10.

[0111] Return to reference Figure 1 , Figure 2 and Figure 4 The connecting busbar 500 will be described in detail below. The battery pack 10 according to this disclosure may also include the connecting busbar 500. The connecting busbar 500 may be disposed on one side of the cell frame 200 in the outermost region away from the power busbar 300. The connecting busbar 500 may be electrically connected to a plurality of battery cells 100 in one direction. The connecting busbar 500 and the battery cells 100 may be electrically connected to each other via connecting wires W. The connecting busbar 500 may have connecting terminals (not shown) that can be electrically connected to another battery pack 10. The cell frame 200 may include a connecting busbar mounting portion 230 on which the connecting busbar 500 is mounted.

[0112] Figure 12 This is an enlarged plan view showing the power busbars of a battery pack according to an embodiment of the present disclosure, and Figure 13 It is shown Figure 12 A magnified 3D view of region B in the image.

[0113] In the following text, reference will be made to Figure 12 and Figure 13 The power busbar 300 of the battery pack 10 according to an embodiment of the present disclosure will be described in more detail.

[0114] The power busbar 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 side of the power busbar 300 (e.g., the +Y axis direction side). 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 side of the power busbar 300. The protruding region 320 and the recessed region 330 may be formed alternately along one side of the power busbar 300.

[0115] 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 enlarged portion 331 may be formed in the recessed region 330. The enlarged portion 331 may be a portion that enlarges from the recessed region 330 toward the first electrode 110 of the battery cell 100.

[0116] As previously Figure 7 As discussed in this disclosure, the power busbar 300 according to another embodiment of the present disclosure can be electrically connected to the first electrode 110 of the battery cell 100 via a connecting wire W. In this case, when the protrusion 321 and the enlargement 331 are provided in the power busbar 300 as described above, the gap between the power busbar 300 and the first electrode 110 can be reduced, and the length of the connecting wire W connecting the power busbar 300 and the first electrode 110 can also be reduced. Therefore, high-power discharge of the battery pack 10 can be performed more efficiently.

[0117] An extension 322 may be formed in the protruding region 320 of the power busbar 300. The extension 322 may be a portion extending from the protruding region 320 toward the second electrode 120 of the battery cell 100. The extension 322 may be connected to the protrusion 321 and may be spaced apart from the enlargement 331. According to the embodiments of this disclosure, the power busbar 300 can be electrically connected to the second electrode 120 of the battery cell 100 via a connecting line W. When the extension 322 is formed on the power busbar 300 as described above, the gap between the power busbar 300 and the second electrode 120 can be reduced, thereby also reducing the length of the connecting line W connecting the power busbar 300 and the second electrode 120. Therefore, high-power discharge of the battery pack 10 can be performed more efficiently.

[0118] The power busbar 300 may include an electrode exposure portion 340. Specifically, the power busbar 300 may extend in one direction and another direction, and the electrode exposure portion 340 may expose a first electrode 110 or a second electrode 120 to the outside at a longitudinal end of the power busbar 300. For example, the power busbar 300 may extend in the X-axis direction, and the electrode exposure portion 340 may be provided at at least one end of the power busbar 300 in the X-direction. The electrode exposure portion 340 may, for example, expose the second electrode 120 to the outside.

[0119] A power busbar guide rib 211 may also be provided on the electrode exposure portion 340. The connecting wire W can be connected from the power busbar 300 to the first electrode 110 or the second electrode 120 of the battery cell 100 exposed through the electrode exposure portion 340 via the power busbar guide rib 211. As described above, one end of the power busbar guide rib 211 may also have the same height as one surface of the power busbar 300. Furthermore, the power busbar guide rib 211 described herein can prevent resin from overflowing when filling the battery pack 10.

[0120] Since the electrode exposure portion 340 is provided in the power busbar 300, the connecting line W can also be provided on the outermost (e.g., the outermost in the X-axis direction) battery cell 100, thereby making it easier to perform high-power discharge of the battery pack 10.

[0121] Figure 14 It is along Figure 4 The cross-sectional view taken from line II-II' is shown.

[0122] In the following text, reference will be made to Figure 14 A detailed description of the sub-busbars of a battery pack according to embodiments of the present disclosure is provided.

[0123] The sub-busbar mounting portion 220 may have a sub-busbar guide rib 221. The sub-busbar guide rib 221 may protrude from the sub-busbar mounting portion 220 in one direction. For example, the sub-busbar guide rib 221 may protrude upward from the sub-busbar mounting portion 220 or along the +Z axis direction. The sub-busbar guide rib 221 may protrude from at least a portion of the edge of the sub-busbar mounting portion 220.

[0124] One surface of the sub-busbar 400 and one end of the sub-busbar guide rib 221 may have the same height. For example, the upper surface 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 of the upper surface 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, h2+H2 corresponding to the height of the upper end of the sub-busbar guide rib 221 may be equal to T2+H2 corresponding to the height of the upper surface of the sub-busbar 400.

[0125] When the sub-busbar 400 and sub-busbar guide rib 221 are configured as described above, the number of bends in the connecting line W from the sub-busbar 400 to the battery cell 100 via the sub-busbar guide rib 221 can be minimized, allowing the connecting line W to be connected with the shortest possible distance. Therefore, the battery pack 10 according to this disclosure has the advantage of effectively performing high-output discharge while the connecting line W smoothly performs its fuse-breaking function.

[0126] For example, the connecting wires of a conventional battery pack may have a length of 10 mm and a fusing current of about 41.5 A, while the connecting wires W of the battery pack 10 according to this disclosure may have a length of 6 mm to 7 mm and a fusing current of about 51.3 A to about 56.2 A.

[0127] The connecting wire W to the sub-busbar 400 can be bent twice. Specifically, it can be bent once at the sub-busbar guide rib 221 and again at the portion connecting to the battery cell 100. In this case, the length of the connecting wire W between the sub-busbar 400 and the battery cell 100 can be further minimized, thereby enabling more efficient high-power discharge of the battery pack 10.

[0128] Figure 15 It is shown Figure 4 An enlarged plan view of region C is shown, and Figure 16 This is an enlarged plan view showing the sub-busbars of a conventional battery.

[0129] In the following text, reference will be made to Figure 15 and Figure 16 The sub-busbar 400 of the battery pack 10 according to an embodiment of the present disclosure will be described in more detail.

[0130] The sub-busbar 400 can be electrically connected to the second electrode 120 of each battery cell 100 disposed on one side via multiple connecting wires W. For example, the sub-busbar 400 can be electrically connected to the second electrode 120 of each battery cell 100 disposed on the +Y axis direction side via two connecting wires W. The sub-busbar 400 can be electrically connected to the first electrode 110 of each battery cell 100 disposed on the other side via multiple connecting wires W. For example, the sub-busbar 400 can be electrically connected to the first electrode 110 of each battery cell 100 disposed on the -Y axis direction side via two connecting wires W.

[0131] In conventional battery packs, sub-busbars 400' are electrically connected to the first electrode 110' or second electrode 120' of each battery cell via a connecting wire W'. This is due to the fact that, due to constructions such as cell frame 200', the first electrode 110' or second electrode 120' must be exposed in a narrow area. Furthermore, when designing the busbar, the number or area of ​​exposed electrode portions must be limited considering increases in resistance or temperature. However, in the case of the battery pack 10 according to this disclosure, since constructions such as cell frame 200 are not provided between the power busbars 300 and sub-busbars 400 or between sub-busbars 400, the first electrode 110 or second electrode 120 of the battery cell 100 can not only be exposed over a wider area, but all the second electrodes 120 of two adjacent battery cells 100 can also be exposed in a common area. Therefore, multiple connecting wires W can be easily connected to the electrodes 110 or 120 of the battery cell 100 respectively (see...). Figure 16 ).

[0132] As described above, when the sub-busbar 400 is electrically connected to each battery on one side and the other side via multiple connecting lines W, the cross-sectional area of ​​the current path between the sub-busbar 400 and the battery cell 100 can be increased, thereby reducing the resistance between the sub-busbar 400 and the battery cell 100. Therefore, high-power discharge of the battery pack 10 can be performed more efficiently.

[0133] For example, assuming the length of connecting wire W or connecting wire W' is 10 mm, the fusing current of connecting wire W' in a conventional battery pack where one of the connecting wires W' is connected to each battery cell can be approximately 41.5 A. However, according to the battery pack 10 of this disclosure where two of the connecting wires W are connected to each battery cell 100, the fusing current can be approximately 83.0 A, which is approximately twice the fusing current of the conventional type.

[0134] In the battery pack 10 according to this disclosure, as described above, due to the shortened length of the connecting wires W, multiple connecting wires W can be connected to the first electrode 110 or the second electrode 120 of each battery cell 100.

[0135] For example, in a conventional battery pack, with each battery cell connected to a 10mm long connecting wire W', the fusing current of the connecting wire W' can be 41.5A. However, in the battery pack 10 of this disclosure, the length of the connecting wire W can be shortened to, for example, 8mm, and each battery cell 100 can be connected to two connecting wires W. In this case, the fusing current of the connecting wire W can be approximately 94.8A, which is approximately 2.28 times the fusing current of a conventional connecting wire.

[0136] Figure 17 This illustrates a battery pack used to explain another embodiment of the present disclosure. Figure 15 The floor plan with modified configuration.

[0137] In the following text, reference will be made to Figure 17 A detailed description of the sub-busbar 400 of the battery pack 10 according to another embodiment of the present disclosure.

[0138] In another embodiment of the battery pack 10 according to this disclosure, such as Figure 14 As shown, the first electrode 110 of each battery cell 100 located on one side of the sub-busbar 400 (e.g., the +Y axis direction side) can be electrically connected to the sub-busbar 400 via multiple connecting wires W. Furthermore, the second electrode 120 of each battery cell 100 located on the other side of the sub-busbar 400 (e.g., the -Y axis direction side) can be electrically connected to the sub-busbar 400 via multiple connecting wires W.

[0139] Figure 18 This is an enlarged plan view showing the sub-busbars of a battery pack according to an embodiment of the present disclosure.

[0140] In the following text, reference will be made to Figure 18 The sub-busbar 400 according to an embodiment of the present disclosure will be described in more detail.

[0141] The sub-busbar 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 a battery cell 100 connected to one side (e.g., the +Y axis direction side) or the other side (e.g., the -Y axis direction side) of the sub-busbar 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 a battery cell 100 connected to one side or the other side of the sub-busbar 400. The protruding region 410 and the recessed region 420 may be alternately formed on one side and the other side of the sub-busbar 400, respectively.

[0142] 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 enlarged portion 421 may be formed in the recessed region 420. The enlarged portion 421 may be a portion that enlarges from the recessed region 420 toward the first electrode 110 of the battery cell 100.

[0143] As described above, when the sub-busbar 400 includes the protrusion 411 and the enlargement 421, the gap between the first electrode 110 of the battery cell 100 and the sub-busbar 400 can be reduced, thereby reducing the length of the connecting line W connecting the two components, thus enabling more efficient high-power discharge of the battery pack 10.

[0144] An extension 412 may be formed in the protruding region 410 of the sub-busbar 400. The extension 412 may be a portion extending from the protruding region 410 toward the second electrode 120 of the battery cell 100. The extension 412 may be connected to the protrusion 411 and may be spaced apart from the enlargement 421. When the extension 412 is formed in the sub-busbar 400, the gap between the sub-busbar 400 and the second electrode 120 can be reduced, thereby also reducing the length of the connecting line W connecting the two components, thus enabling more efficient high-power discharge of the battery pack 10.

[0145] The sub-busbar 400 may include an electrode exposure portion 430. Specifically, the sub-busbar 400 may extend, and the electrode exposure portion 430 may expose either the first electrode 110 or the second electrode 120 to the outside at a longitudinal end (e.g., an end in the X-axis direction) of the sub-busbar 400. For example, the electrode exposure portion 430 may expose, for example, the second electrode 120 to the outside through at least one of the two ends in the X-axis direction of the sub-busbar 400.

[0146] Since the electrode exposure portion 430 is provided in the sub-busbar 400, the connecting line W can also be provided in the battery cell 100 connected to the outermost (e.g., the outermost in the X-axis direction), thereby making it easier to perform high-power discharge of the battery pack 10.

[0147] The cell frame 200 may also include a base plate 240, which forms a bottom to support multiple battery cells 100 (see...). Figure 1 ).

[0148] An edge portion 201 may be provided on one edge of the cell frame 200. For example, an edge portion 201 that extends along the edge around the entire cell frame 200 and protrudes upward to a predetermined height may be provided on the upper edge of the cell frame 200. The edge portion 201 can prevent resin filled inside the battery pack 10 from overflowing to the outermost side of the battery pack 10 (see [link]). Figure 4 ).

[0149] Preferred examples of the battery pack 10 according to this disclosure have been described above. The technical concept of this disclosure is not limited to these examples and may cover combinations of two or more of them.

[0150] Although not shown in the accompanying drawings, the battery pack 10 according to this disclosure may also include various devices for controlling the charging and discharging of the battery cells 100, such as a BMS (battery management system), a current sensor, and a fuse.

[0151] Figure 19 This is a diagram illustrating an electrical device according to an embodiment of the present disclosure.

[0152] refer to Figure 19 The battery pack 10 according to this disclosure can be applied to an electrical device V. The electrical device V can operate based on electricity supplied from the battery pack 10 according to this disclosure. The electrical device V can be an LEV (Light Electric Vehicle). Examples of LEVs include electric motorcycles, electric bicycles, electric scooters, and electric golf carts. The electrical device V can also be an electric vehicle or a hybrid vehicle.

[0153] In addition to electrical equipment V, the battery pack 10 according to embodiments of the present disclosure can also be installed in other equipment, devices and facilities, such as energy storage systems using secondary batteries.

[0154] Although directional terms such as up, down, left, right, forward, and backward are used in this specification, it will be apparent to those skilled in the art to which this disclosure pertains that these terms are merely for ease of interpretation with reference to the accompanying drawings and may vary depending on the position of the object or the observer.

[0155] As described above, although this disclosure has been described with reference to limited embodiments and drawings, this disclosure is not limited thereto, and various modifications and changes can be made by those skilled in the art to which this disclosure pertains without departing from the technical concept of this disclosure and the equivalent scope of the claims described below.

[0156] Description of the attached figures

[0157] 10: Battery Pack

[0158] 100: Battery cell

[0159] 110: First electrode

[0160] 120: Second electrode

[0161] 200: Cell frame

[0162] 201: Edge

[0163] 210: Power Busbar Installation Department

[0164] 211: Power busbar guide rib

[0165] 220: Sub-confluence strip resettlement department

[0166] 221: Sub-bus guide rib

[0167] 230: Connecting busbar installation section

[0168] 240: Base Plate

[0169] 300: Power Busbar

[0170] 310: Power terminal

[0171] 320: Emphasis on the area

[0172] 321: Prominent part

[0173] 322: Extension

[0174] 330: Depressed area

[0175] 331: Enlarged Department

[0176] 340: Electrode exposed section

[0177] 400: Sub-conductor strip

[0178] 410: Emphasize the area

[0179] 411: Protrusion

[0180] 412: Extension

[0181] 420: Depressed area

[0182] 421: Enlarged Department

[0183] 430: Electrode exposed section

[0184] 500: Connect busbar

[0185] W: Connecting line

[0186] V: Electrical equipment

Claims

1. A battery pack, the battery pack comprising: Multiple battery cells, wherein the multiple battery cells include a first electrode and a second electrode; A cell frame configured to support and accommodate the plurality of battery cells; A power busbar is provided on the outermost region of one side of the cell frame and is electrically connected to the battery cell in one direction via multiple connecting lines. as well as A power busbar mounting section includes a power busbar guide rib protruding in one direction to guide the mounting of the power busbar, and is configured such that the power busbar is mounted on the power busbar mounting section. One surface of the power busbar has the same height as one end of the power busbar guide rib.

2. The battery pack according to claim 1, in, The connecting wire connected to the power busbar is bent twice.

3. The battery pack according to claim 1, in, The power busbar is electrically connected to the second electrode of each of the battery cells via the multiple connecting lines.

4. The battery pack according to claim 1, in, The power busbar is electrically connected to the first electrode of each battery cell via the multiple connecting lines.

5. The battery pack according to claim 1, The battery pack also includes sub-busbars, which are disposed on one side of the cell frame inside the power busbars and are electrically connected to the battery cells in one and another direction via multiple connecting wires. in, One surface of the power busbar is positioned higher than one surface of the sub-busbar.

6. The battery pack according to claim 5, The battery pack also includes a sub-busbar mounting section, on which the sub-busbars are mounted. in, The power busbar and the sub-busbar have the same thickness, and Wherein, one surface of the power busbar mounting section is positioned higher than one surface of the sub-busbar mounting section.

7. The battery pack according to claim 5, The battery pack also includes a sub-busbar mounting section, on which the sub-busbars are mounted. in, One surface of the sub-busbar mounting section has the same height as one surface of the power busbar mounting section, and The thickness of the power busbar is greater than the thickness of the sub-busbar.

8. The battery pack according to claim 1, in, The power busbar includes a protruding area that protrudes toward the battery cell and a recessed area that recesses toward the battery cell. In this process, a protrusion is formed in the protruding region that protrudes toward the first electrode, and An enlarged portion is formed in the recessed region, extending toward the first electrode.

9. The battery pack according to claim 1, in, The power busbar includes a protruding region facing the battery cell and a recessed region facing the battery cell, and In this region, an extension is formed that extends toward the second electrode.

10. The battery pack according to claim 1, in, The power busbar is configured to extend in one direction and another direction, and includes an electrode exposure portion configured to expose either the first electrode or the second electrode to the outside at a longitudinal end of the power busbar.

11. The battery pack according to claim 1, wherein the battery pack comprises: Sub-busbars are disposed on one side of the cell frame inside the power busbars and are electrically connected to the battery cell in one and another direction via the multiple connecting lines. as well as A sub-busbar placement portion, the sub-busbar placement portion including a sub-busbar guide rib protruding in one direction to guide the placement of the sub-busbar, and configured such that the sub-busbar is placed on the sub-busbar placement portion. One surface of the sub-busbar has the same height as one end of the sub-busbar guide rib.

12. The battery pack according to claim 11, in, The connecting line connected to the sub-busbar is bent twice.

13. The battery pack according to claim 11, in, The sub-busbar is electrically connected to the second electrode of each battery cell disposed on one side of it via the plurality of connecting lines, and The plurality of connecting lines are electrically connected to the first electrode of each battery cell located on the other side thereof.

14. The battery pack according to claim 11, in, The sub-busbar includes a protruding region that protrudes toward the battery cell and a recessed region that is recessed toward the battery cell. In this process, a protrusion is formed in the protruding region that protrudes toward the first electrode, and An enlarged portion is formed in the recessed region, extending toward the first electrode.

15. The battery pack according to claim 11, in, The sub-busbar includes a protruding region extending toward the battery cell and a recessed region extending toward the battery cell, and In this region, an extension is formed that extends toward the second electrode.

16. The battery pack according to claim 11, in, The sub-busbar is configured to extend in one direction and another direction, and includes an electrode exposure portion configured to expose the first electrode or the second electrode to the outside at the longitudinal end of the sub-busbar.

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

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