Busbar, battery pack comprising busbar, and vehicle comprising battery pack

Abstract

A busbar, a battery pack comprising busbar, and a vehicle comprising the battery pack are disclosed. According to one embodiment of the present invention, the busbar comprises: an electric connection member electrically connected to an object; a cover member, which covers at least a portion of the electric connection member and has a storage space; a fire extinguishing material stored in the storage space of the cover member; and a stopper member coupled to the cover member.

Description

Busbar and battery pack including the same and vehicle including the battery pack

[0001] This application is a priority application for Korean Patent Application No. 10-2025-0031650 filed on March 11, 2025, and all contents disclosed in the specification and drawings of said application are incorporated into this application by reference.

[0002] The present invention relates to a busbar, a battery pack including the same, and a vehicle including the battery pack. More specifically, the invention relates to a busbar capable of easily removing an arc or flame generated in the busbar, a battery pack including the same, and a vehicle including the battery pack.

[0003] Generally, a secondary battery refers to a battery capable of repeated charging and discharging, such as lithium-ion batteries, lithium-polymer batteries, nickel-cadmium batteries, nickel-hydrogen batteries, and nickel-zinc batteries. The battery cells corresponding to the most basic secondary batteries can provide an output voltage of approximately 2.5V to 4.2V.

[0004] Recently, as these battery cells are applied to devices requiring high output voltage and large charging capacity, such as electric vehicles or Energy Storage Systems (ESS), battery modules configured by connecting multiple battery cells in series, parallel, or a combination of series and parallel, and battery packs configured by connecting these battery modules again in series, parallel, or a combination of series and parallel are widely used.

[0005] Lithium secondary batteries are currently in the spotlight due to their advantages, such as high operating voltage and significantly higher energy density, but because they use organic electrolytes, if the lithium secondary battery is overcharged, it causes overcurrent and overheating, which in severe cases can lead to explosions or fires caused by ignition.

[0006] Various types of secondary batteries may include a battery module in which a plurality of battery cells are stacked and inserted into a module case equipped with a module case capable of protecting the battery cells, and a battery pack containing a plurality of battery modules.

[0007] A secondary battery is equipped with a busbar for electrically connecting various electrical components, including battery cells. In various situations, for example, a short circuit may occur due to poor contact, contamination, or physical damage to the busbar, or an overcurrent exceeding the designed current capacity of the busbar may flow, causing overheating and potentially resulting in an arc or flame on the busbar.

[0008] However, conventional busbars have a problem in that they are not structured to respond to arcs or flames, making it difficult to block flame propagation.

[0009] Accordingly, the technical problem that the present invention aims to solve is to provide a busbar that can easily remove an arc or flame when it occurs in the busbar, a battery pack including the same, and a vehicle including the battery pack.

[0010] In addition, the invention provides a busbar capable of preventing flames generated from the busbar from being transmitted to a battery cell, battery module, or battery pack, a battery pack including the same, and a vehicle including the battery pack.

[0011] In addition, the invention provides a battery module, a battery pack, and a vehicle capable of preventing thermal runaway by preventing a chain reaction of flames caused by flame propagation.

[0012] However, the technical problems that the present invention aims to solve are not limited to those described above, and other unmentioned problems will be clearly understood by those skilled in the art from the description of the invention below.

[0013] According to one aspect of the present invention, a busbar may be provided comprising: an electrical connection member electrically connected to an object; a cover member covering at least a portion of the electrical connection member and having a storage space formed therein; a fire extinguishing substance stored in the storage space of the cover member; and a stopper member coupled to the cover member.

[0014] In one embodiment, the electrical connection member comprises a first part extending in a first direction; a second part extending in a second direction opposite to the first direction; and a center formed between the first part and the second part, and the cover member may be located at the center.

[0015] In one embodiment, the electrical connection member may have a fusing portion formed therein that breaks when an overcurrent flows.

[0016] In one embodiment, the fusing part may be a through hole formed in the electrical connection member.

[0017] In one embodiment, the fusing part may include a through hole formed in the electrical connection member; and an incision groove extending from the through hole.

[0018] In one embodiment, the fusing portion may be a notching groove formed on the outer side of the electrical connection member.

[0019] In one embodiment, the storage space may be formed on the upper side of the cover member.

[0020] In one embodiment, the storage space may be formed on both the upper and lower sides of the cover member.

[0021] In one embodiment, the extinguishing substance may be a extinguishing fluid stored in the storage space under high pressure.

[0022] In one embodiment, a coupling groove is formed in the cover member, and a coupling protrusion that is coupled to the coupling groove may be formed in the stopper member.

[0023] In one embodiment, the plug member may be formed of fire-resistant silicone.

[0024] In one embodiment, a leak prevention member may be included that is coupled to the cover member so as to be disposed between the cover member and the fire extinguishing material.

[0025] In one embodiment, an insertion groove is formed in the cover member, and the leakage prevention member can be inserted into the insertion groove.

[0026] Meanwhile, according to another aspect of the present invention, a battery pack including the aforementioned busbar may be provided, and a vehicle including the aforementioned battery pack may also be provided.

[0027] The embodiments of the present invention have the effect of easily removing an arc or flame when it occurs in the busbar.

[0028] In addition, it has the effect of preventing flames generated from the busbar from being transmitted to the battery cell, battery module, or battery pack.

[0029] In addition, it has the effect of preventing thermal runaway phenomena by preventing a chain reaction of flames caused by flame propagation.

[0030] However, the effects obtainable through the present invention are not limited to those described above, and other unmentioned technical effects will be clearly understood by those skilled in the art from the description of the invention below.

[0031] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings.

[0032] FIG. 1 is a schematic perspective view of a busbar assembly according to a first embodiment of the present invention.

[0033] FIG. 2 is a schematic exploded perspective view of a busbar according to a first embodiment of the present invention.

[0034] FIG. 3 is a cross-sectional view of a cover member in a bus bar according to a first embodiment of the present invention.

[0035] FIG. 4 is a cross-sectional view of the present invention taken along A-A' of FIG. 1.

[0036] Figure 5 is an enlarged view of part B of Figure 4.

[0037] FIG. 6 is a schematic diagram illustrating the appearance of fire extinguishing material stored in a storage space leaking out when an arc or flame occurs in a busbar according to the first embodiment of the present invention.

[0038] FIG. 7 is a modified embodiment of the first embodiment of the present invention in which a coupling protrusion is formed on the plug member.

[0039] Figure 8 is a schematic diagram illustrating the ejection of high-pressure fire extinguishing material stored in the storage space in Figure 7.

[0040] FIG. 9 is a drawing illustrating a leak prevention member coupled to a cover member as another modified embodiment of the first embodiment of the present invention.

[0041] FIG. 10 is a drawing illustrating an electrical connection member in a busbar according to a second embodiment of the present invention.

[0042] FIG. 11 is a drawing illustrating an electrical connection member according to a modified embodiment of a busbar according to a second embodiment of the present invention.

[0043] FIG. 12 is a drawing illustrating an electrical connection member according to another modified embodiment of a busbar according to a second embodiment of the present invention.

[0044] FIG. 13 is a drawing of a battery pack including a busbar according to each embodiment of the present invention.

[0045] FIG. 14 is a drawing illustrating a car including the battery pack of FIG. 13.

[0046] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention. Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely one preferred embodiment of the present invention and do not represent all aspects of the technical spirit of the present invention; therefore, it should be understood that various equivalents and modifications capable of replacing them may exist at the time of filing this application.

[0047] In the drawings, the size of each component or specific part constituting the component is exaggerated, omitted, or schematically depicted for convenience and clarity of explanation. Accordingly, the size of each component does not entirely reflect its actual size. If it is determined that a detailed description of related known functions or configurations could unnecessarily obscure the essence of the invention, such description shall be omitted.

[0048] As used in this specification, the terms "combination" or "connection" include not only cases where one member and another member are directly joined or directly connected, but also cases where one member is indirectly joined or indirectly connected to another member through a connecting member.

[0049] Meanwhile, contents common to parts described in any one embodiment of the present invention may also be applied to other embodiments. For example, contents common to parts described in the first embodiment of the second embodiment may be replaced by the description of the first embodiment described above, and such common contents may also be applied to the second embodiment. Furthermore, contents described in the second embodiment that are applicable to the first embodiment may also be applied to the first embodiment. The same applies to other embodiments.

[0050] FIG. 1 is a schematic assembled perspective view of a busbar according to a first embodiment of the present invention, FIG. 2 is a schematic exploded perspective view of a busbar according to a first embodiment of the present invention, FIG. 3 is a cross-sectional view of a cover member in a busbar according to a first embodiment of the present invention, FIG. 4 is a cross-sectional view of FIG. 1 viewed along A-A', FIG. 5 is an enlarged view of part B in FIG. 4. Here, FIG. 4 illustrates a cross-section in which a stopper member is coupled to a cover member after a fire extinguishing substance is stored in the storage space of the cover member in the busbar.

[0051] Referring to FIGS. 1 to 5, a bus bar (10) according to one embodiment of the present invention includes an electrical connection member (100), a cover member (200), a fire extinguishing material (300), and a stopper member (400).

[0052] Referring to FIGS. 1 and 2, the electrical connection member (100) is electrically connected to an object (not shown). Here, the object may include various components that can be electrically connected to the busbar (10), for example, electrode leads of a battery cell, various external terminals, or various connectors.

[0053] The electrical connection member (100) may be composed of various materials with high electrical conductivity, such as copper and aluminum, to allow current to flow, but the material of the electrical connection member (100) is not limited thereto.

[0054] The electrical connection member (100) may be configured to include a first part (110), a second part (120), and a central part (130). Referring to FIG. 1, the first part (110) extends in a first direction. Here, the first direction includes various directions. And, the second part (120) extends in a second direction opposite to the first direction.

[0055] The center (130) is formed between the first part (110) and the second. The center (130) includes the exact center of the electrical connection member (100), but is a broader concept than the exact center of the electrical connection member (100). A cover member (200), which will be described later, may be located in the center (130). Here, a fusing part (140) may be formed in the center (130), but this will be described later in the second embodiment.

[0056] Referring to FIGS. 1 and 2, the cover member (200) is configured to cover at least a portion of the electrical connection member (100), for example, the center (130) of the electrical connection member (100).

[0057] However, the cover member (200) does not necessarily have to be configured to cover the center (130) of the electrical connection member (100), and it may be configured to cover the electrical connection member (100) outside the center (130). However, for convenience of explanation, the following description focuses on the case where the cover member (200) is configured to cover the center (130) of the electrical connection member (100).

[0058] And, referring to FIG. 3, a storage space (210) is formed in the cover member (200). The storage space (210) can be formed in various ways, for example, it can be formed in the cover member (200) itself as in FIG. 3. Alternatively, although not shown in the drawing, it may be formed separately from the cover member (200) and then coupled to the cover member (200).

[0059] Referring again to FIG. 3, the storage space (210) may be formed on both the upper and lower sides of the cover member (200). However, it is not limited thereto, and the storage space (210) may be formed only on the upper side of the cover member (200).

[0060] Referring to FIGS. 4 and 5, a fire extinguishing substance (300) is stored in a storage space (210). When the fire extinguishing substance (300) is injected and stored in the storage space (210), a stopper member (400) is coupled to a cover member (200) to close the storage space (210).

[0061] The cover member (200) can be formed of various types of materials, such as various plastics, that can melt when an arc or flame occurs in the bus bar (10). The cover member (200) can be made of, for example, polypropylene, but the material of the cover member (200) is not limited thereto.

[0062] Referring again to FIGS. 4 and 5, the extinguishing substance (300) is stored in the storage space (210) of the cover member (200). The extinguishing substance (300) may be various, for example, a liquid substance or a powder substance. However, it is not limited thereto, and the types of the extinguishing substance (300) may be more diverse. For convenience of explanation, the following description will focus on the case where the extinguishing substance (300) is a liquid substance.

[0063] The extinguishing substance (300) can be released to the outside to remove the arc or flame when the cover member (200) melts due to the arc or flame generated from the busbar (10). Additionally, it prevents the flame generated from the busbar (10) from being transmitted to the battery cell, battery module, or battery pack, and also prevents a chain reaction of flames caused by flame propagation, thereby preventing thermal runaway.

[0064] Since the extinguishing substance (300) is stored in the storage space (210) of the cover member (200) covering the electrical connection member (100), when an arc or flame occurs in the bus bar (10), it can be immediately supplied to the arc or flame of the bus bar (10), thereby being effective in preventing the propagation or spread of the flame.

[0065] Referring to FIGS. 4 and 5, a plug member (400) is coupled to a cover member (200). The plug member (400) blocks the storage space (210) of the cover member (200) to prevent the fire extinguishing material (300) stored in the storage space (210) from leaking out of the storage space (210).

[0066] The plug member (400) can be attached to the cover member (200) in various ways. For example, the plug member (400) can be attached to the cover member (200) by an interference fit method. Alternatively, the plug member (400) can be attached to the cover member (200) by a bonding method. However, the method of attaching the plug member (400) to the cover member (200) is not limited to this, and a wider variety of methods may be applied.

[0067] The stopper member (400) can be made of various materials. For example, the stopper member (400) can be formed of fire-resistant silicone, but the material of the stopper member (400) is not limited thereto.

[0068] If the plug member (400) is formed of fireproof silicone, it can withstand an arc without melting for arcs smaller than a preset size. However, if an arc larger than a preset size occurs, the fireproof silicone melts, and the extinguishing material (300) stored in the storage space (210) leaks out to the outside, thereby extinguishing the arc.

[0069] FIG. 6 is a schematic diagram illustrating the appearance of fire extinguishing material stored in a storage space leaking out when an arc or flame occurs in a busbar according to the first embodiment of the present invention.

[0070] Referring to FIG. 6, when an arc (600) larger than a preset size occurs in the electrical connection member (100), the plug member (400) formed of fire-resistant silicone melts, and accordingly, a fire extinguishing substance (300) flows out through the melted part of the plug member (400). Then, the fire extinguishing substance (300) flows down toward the electrical connection member (100) to remove the arc (600) generated in the electrical connection member (100).

[0071] Also, although not shown in the drawing, if an arc (600) occurs in the electrical connection member (100), the cover member (200) may melt and the extinguishing material (300) may flow down toward the electrical connection member (100).

[0072] Meanwhile, the flame may originate not only from the electrical connection member (100) itself but also from outside the electrical connection member (100), for example, from a battery cell. In this way, if a flame originates from a battery cell, the cover member (200) may melt due to the flame originating from the battery cell, and the extinguishing material (300) stored in the storage space (210) of the cover member (200) may move toward the battery cell to eliminate the flame. Here, the flame originating from outside the electrical connection member (100) is not limited to the battery cell but includes flames originating from various locations inside the battery pack.

[0073] FIG. 7 is a modified embodiment of the first embodiment of the present invention in which a coupling protrusion is formed on a stopper member, and FIG. 8 is a schematic diagram illustrating the appearance of high-pressure fire extinguishing material stored in a storage space in FIG. 7 being ejected.

[0074] Referring to FIG. 7, the extinguishing substance (300) may be a extinguishing fluid (310) stored in a storage space (210) in a high-pressure state. In order to prevent the extinguishing fluid (310) in a high-pressure state from leaking out of the storage space (210) of the cover member (200), a coupling groove (220) may be formed in the cover member (200), and a coupling protrusion (410) that is coupled to the coupling groove (220) may be formed in the stopper member (400). That is, the coupling protrusion (410) of the stopper member (400) is coupled to the coupling groove (220) of the cover member (200), thereby preventing the stopper member (400) from being dislodged by the pressure of the high-pressure extinguishing fluid (310).

[0075] Referring to FIG. 8, when an arc occurs in the electrical connection member (100), the cover member (200) melts and the extinguishing substance (300) can be sprayed toward the electrical connection member (100). In FIG. 6, the extinguishing substance (300) simply flowed down toward the arc, whereas in FIG. 8, the extinguishing substance (300) is sprayed toward the electrical connection member (100) by the pressure of the extinguishing substance (300) stored at high pressure, so the arc can be removed more effectively.

[0076] FIG. 9 is a drawing illustrating a leak prevention member coupled to a cover member as another modified embodiment of the first embodiment of the present invention.

[0077] Referring to FIG. 9, the leak prevention member (500) can be coupled to the cover member (200) so as to be placed between the cover member (200) and the fire extinguishing substance (300). The leak prevention member (500) is configured to prevent the fire extinguishing substance (300) from leaking out of the storage space (210).

[0078] The leak prevention member (500) can be made of various materials, for example, vinyl, but the material of the leak prevention member (500) is not limited thereto. The leak prevention member (500) can be attached to the cover member (200) by, for example, bonding.

[0079] Meanwhile, referring to FIG. 9, when a leak prevention member (500) is provided, the cover member (200) may include an upper part (240) and a lower part (250). Here, the upper part (240) and the lower part (250) are separated from each other.

[0080] And, with the upper part (240) separated from the lower part (250), the leak prevention member (500) can be coupled to the cover member (200) through the upper space. And, the fire extinguishing substance (300) can also be stored in the storage space (210) through the upper space. And, when the fire extinguishing substance (300) is stored in the storage space (210), the upper part (240) can be configured to be coupled to the lower part (250).

[0081] As shown in FIG. 9, an insertion groove (230) is formed in the cover member (200), and a leak prevention member (500) can be inserted into the insertion groove (230). In this case, the leak prevention member (500) can also be bonded to the cover member (200).

[0082] FIG. 10 is a drawing illustrating an electrical connection member in a busbar according to a second embodiment of the present invention, FIG. 11 is a drawing illustrating an electrical connection member according to a modified embodiment of the busbar according to the second embodiment of the present invention, and FIG. 12 is a drawing illustrating an electrical connection member according to another modified embodiment of the busbar according to the second embodiment of the present invention.

[0083] For convenience of explanation, only the electrical connection member (100) is shown in FIGS. 10 to 12 and the cover member (200) is omitted from the illustration. However, in each embodiment of FIGS. 10 to 12, just like FIGS. 1 and 2, a cover member (200) with a storage space (210) formed and a plug member (400) attached is coupled to the electrical connection member (100).

[0084] Referring to FIGS. 10 to 12, a fusing portion (140) may be formed in the electrical connection member (100) of the bus bar (10). For example, the fusing portion (140) may be formed on one side of the electrical connection member (100) so that the electrical connection member (100) breaks when an overcurrent flows through the electrical connection member (100). The fusing portion (140) may be formed at various locations on the electrical connection member (100), but for convenience of explanation, the following description will focus on the case where the fusing portion (140) is formed at the center (130) of the electrical connection member (100).

[0085] Referring to FIG. 10, the fusing portion (140) may be a through hole (141) formed in the center (130) of the electrical connection member (100). Here, the through hole (141) may have a variety of numbers. For example, FIG. 10 shows one through hole (141), but this is only one embodiment, and the number of through holes (141) may vary.

[0086] Also, the through hole (141) can have various shapes. For example, in FIG. 10, an elliptical through hole (141) is shown, but this is just one example, and the shape of the through hole (141) can be circular, triangular, square, etc.

[0087] In this way, when a through hole (141) is formed in the electrical connection member (100), a break may occur from the through hole (141) when an overcurrent flows through the electrical connection member (100).

[0088] Meanwhile, if an overcurrent flows through the electrical connection member (100) and a fracture occurs in the fusing part (140, through hole (141) in FIG. 10), an arc is instantaneously generated at the fractured part of the electrical connection member (100). In this way, the arc generated by the fracture of the fusing part (140) can be removed by the extinguishing material (300) stored in the storage space (210) of the aforementioned cover member (200).

[0089] To this end, the storage space (210) of the cover member (200) may be configured to be located immediately above the through hole (141) of FIG. 10. In this case, when an arc occurs and the plug member (400) melts, the extinguishing material (300) moves directly toward the through hole (141), so the arc caused by the rupture of the through hole (141) can be immediately removed. The details described herein may also be commonly applied to FIG. 11 and FIG. 12.

[0090] Referring to FIG. 11, the fusing part (140) may include a through hole (142) and an incision groove (143).

[0091] The through hole (142) can be formed in the center (130) of the electrical connection member (100), and since it is basically common with the content of the through hole (141) described in FIG. 10, it is replaced by the description above.

[0092] The cut groove (143) extends from the through hole (142). The cut groove (143) is formed outward from the circumference of the through hole (142). In FIG. 11, a pair of cut grooves (143) are formed in the through hole (142), but the number of cut grooves (143) is not limited to this and can vary. Also, a pair of cut grooves (143) can be formed to face in opposite directions. Here, the shapes of the through hole (142) and the cut groove (143) can vary.

[0093] In this way, when an incision groove (143) is formed in the through hole (142), the incision groove (143) and the through hole (142), which are the fusing part (140), can be easily broken when an overcurrent flows through the electrical connection member (100).

[0094] Referring to FIG. 12, the fusing portion (140) may be a notching groove (144) formed on the outer side of the center (130). In FIG. 12, a pair of notching grooves (144) are formed on the outer side of the center (130) of the electrical connection member (100), but the number of notching grooves (144) may vary.

[0095] Also, the notching groove (144) can have various shapes. In FIG. 12, the notching groove (144) is formed in a triangular shape, but is not limited thereto.

[0096] FIG. 13 is a drawing of a battery pack including a busbar according to each embodiment of the present invention.

[0097] Referring to FIG. 13, a battery pack (30) according to one embodiment of the present invention may include one or more bus bars (10) according to each embodiment of the present invention described above.

[0098] In addition, the battery pack (30) may include various types of battery cells, for example, pouch-type battery cells, cylindrical battery cells, or prismatic battery cells.

[0099] In addition, the battery pack (30) may further include a pack case (31) and various devices for controlling the charging and discharging of battery cells, such as a BMS, a current sensor, a fuse, etc.

[0100] Here, when the battery pack (30) includes a pouch-type battery cell (20), the pouch-type battery cell (20) may be stored directly in the pack case (31), as shown in FIG. 13. Alternatively, although not shown in the drawings, the pouch-type battery cell may be stored in the module case of a battery module, and the battery module in which the pouch-type battery cell is stored may be stored in the pack case (31).

[0101] FIG. 14 is a drawing illustrating a car including the battery pack of FIG. 13.

[0102] Referring to FIG. 14, a vehicle (40) according to one embodiment of the present invention may include one or more battery packs (30) according to each embodiment of the present invention described above. Here, the battery pack (30) may include one or more busbars (10) according to each embodiment of the present invention described above.

[0103] Here, the above-mentioned automobile (40) includes various types of automobiles configured to use electricity, such as electric vehicles or hybrid vehicles, for example.

[0104] In this specification, where terms indicating directions such as up, down, left, and right are used, these terms are used merely for convenience of explanation, and it is obvious to those skilled in the art that they may vary depending on the location of the object or the position of the observer.

[0105] Although the present invention has been described above by means of limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical spirit of the present invention and the equivalent scope of the claims set forth below by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed above should be considered in an illustrative rather than a restrictive sense. That is, the scope of the true technical spirit of the present invention is indicated in the claims, and all variations within the equivalent scope thereof should be interpreted as being included in the present invention.

[0106] The present invention relates to a busbar, a battery pack including the same, and an automobile including the battery pack, and is particularly applicable to industries related to secondary batteries.

Claims

1. An electrical connection member electrically connected to an object; A cover member that covers at least a portion of the above electrical connection member and has a storage space formed therein; A extinguishing substance stored in the storage space of the above-mentioned cover member; and A bus bar including a plug member coupled to the above cover member.

2. In Paragraph 1, The above electrical connection member is, A first part extending in the first direction; A second part extending in a second direction opposite to the first direction above; and It includes a central part formed between the first part and the second part, A bus bar characterized by the above cover member being located at the center.

3. In Paragraph 1, A bus bar characterized by having a fusing portion formed in the electrical connection member that breaks when an overcurrent flows.

4. In Paragraph 3, A bus bar characterized in that the fusing part is a through hole formed in the electrical connection member.

5. In Paragraph 3, The above fusing unit is, A through hole formed in the above electrical connection member; and A bus bar characterized by including an incision groove extending from the above-mentioned through hole.

6. In Paragraph 3, A bus bar characterized in that the fusing portion is a notching groove formed on the outer side of the electrical connection member.

7. In Paragraph 1, A bus bar characterized by the storage space being formed on the upper side of the cover member.

8. In Paragraph 1, A busbar characterized in that the storage space is formed on both the upper and lower sides of the cover member.

9. In Paragraph 1, A busbar characterized in that the above-mentioned extinguishing substance is a extinguishing fluid stored in the storage space under high pressure.

10. In Paragraph 9, A coupling groove is formed in the above cover member, and A bus bar characterized by having a coupling protrusion formed in the above-mentioned plug member that is coupled to the above-mentioned coupling groove.

11. In Paragraph 1, A bus bar characterized in that the above-mentioned plug member is formed of fire-resistant silicone.

12. In Paragraph 1, A bus bar characterized by including a leak-prevention member coupled to the cover member so as to be disposed between the cover member and the fire-extinguishing material.

13. In Paragraph 12, An insertion groove is formed in the above cover member, and A bus bar characterized by the above-mentioned leak-prevention member being inserted into the above-mentioned insertion groove.

14. A battery pack comprising a busbar according to any one of paragraphs 1 through 13.

15. An automobile including a battery pack pursuant to paragraph 4.

Images