Bus bar assembly and battery pack including the same

Abstract

A bus bar assembly according to an embodiment of the present invention includes a bus bar connected to a battery module inside a battery pack to guide an electrical connection of the battery module; a refractory silicon layer covering an outer peripheral surface of the bus bar; and a glass fiber tape covering the refractory silicon layer. A plurality of grooves are formed on a surface of the refractory silicon layer.

Description

Technical Field

[0001] [Cross - reference to Related Applications] This application claims the benefit of priority based on Korean Patent Application No. 10 - 2023 - 0004100 filed on January 11, 2023, and all the contents disclosed in the literature of the Korean patent application are incorporated herein by reference in their entirety.

[0002] The present invention relates to a bus bar assembly and a battery pack including the same, and more particularly, to a bus bar assembly having improved fire resistance and a battery pack including the same.

Background Art

[0003] In modern society, while the use of portable devices such as mobile phones, laptops, video cameras, and digital cameras has become common, the development of technologies in the field related to such mobile devices has been active. In addition, rechargeable secondary batteries are a solution for solving problems such as air pollution in existing gasoline vehicles that use fossil fuels, and are used as power sources for electric vehicles (EVs), hybrid electric vehicles (HEVs), plug - in hybrid electric vehicles (P - HEVs), etc., and the need for the development of secondary batteries is increasing.

[0004] Current commercialized secondary batteries include nickel - cadmium batteries, nickel - metal hydride batteries, nickel - zinc batteries, lithium secondary batteries, etc. Among them, lithium secondary batteries have attracted attention for their advantages such as almost no memory effect compared to nickel - based secondary batteries, free charge and discharge, very low self - discharge rate, and high energy density.

[0005] Such lithium secondary batteries mainly use lithium - based oxides and carbon materials as the positive electrode active material and the negative electrode active material, respectively. A lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate, each coated with such a positive electrode active material and a negative electrode active material, are disposed with a separator therebetween, and a battery case for hermetically storing the electrode assembly together with an electrolytic solution.

[0006] Generally, lithium secondary batteries can be classified into can-type secondary batteries in which the electrode assembly is installed in a metal can according to the shape of the exterior material, and pouch-type secondary batteries in which the electrode assembly is installed in a pouch made of an aluminum laminate sheet.

[0007] In the case of secondary batteries used in small devices, two or three battery cells are arranged. However, in the case of secondary batteries used in medium and large devices such as automobiles, a battery module in which a plurality of battery cells are electrically connected is used. Such a battery module can improve the capacity and output by forming a battery cell stack in which a plurality of battery cells are connected in series or parallel to each other. In addition, one or more battery modules can be mounted together with various control and protection systems such as a BDU (Battery Disconnect Unit), a BMS (Battery Management System), and a cooling system to form a battery pack.

[0008] In a battery pack in which a plurality of battery modules are gathered, the heat generated from a plurality of battery cells may be combined in a narrow space, and the temperature may rise rapidly and significantly. That is, in the case of a battery module in which a plurality of battery cells are stacked and a battery pack in which such a battery module is mounted, a high output can be obtained. However, if the heat dissipation of the battery cells is not properly performed or the thermal runaway phenomenon of the battery cells occurs, there is a high possibility of explosion or ignition.

[0009] On the other hand, a bus bar connected to the battery module is provided inside the battery pack. FIG. 1 is a plan view showing a conventional bus bar, and FIG. 2 is a cross-sectional view showing a cross-section cut along the cutting line A-A' of FIG. 1.

[0010] Referring to FIGS. 1 and 2, a conventional bus bar 20 is a rod-shaped metal member extending along the length direction, and through holes for connection with the terminal bus bar of the battery module can be formed at both ends of the bus bar 20. Such a bus bar 20 is a configuration responsible for HV (High voltage) connection in a battery pack. The HV connection means the connection of the role of a power source for supplying power, and the bus bar 20 is a configuration for guiding the electrical connection of the battery module and generally includes a metal material with excellent electrical conductivity. As an example, the bus bar 20 can include a copper (Cu) material.

[0011] A covering member 20C can wrap such a bus bar 20. The covering member 20C can include an electrically insulating material, and as an example, can include a silicon material or an epoxy material. Since the covering member 20C wraps the bus bar 20 through which a high current flows, it is blocked that the bus bar 20 comes into contact with other electrical components or conductive members other than the terminal bus bar of the battery module and a short circuit occurs.

[0012] Recently, for a battery pack, equipment is required that does not allow a flame to jet out to the outside of the battery pack even if ignition occurs inside the battery pack. Since the flame generated inside the battery pack has a very high temperature of about 1000°C, the covering member 20C wrapping the bus bar 20 may melt and the bus bar 20 may be exposed. If the exposed bus bar 20 comes into contact with other electrical components or conductive members and a short circuit occurs, the internal flame may spread more, and such a flame may propagate to the outside of the battery pack. Ultimately, this may lead to the explosion of the battery pack or the vehicle on which the battery pack is mounted.

[0013] Therefore, even if a flame occurs inside the battery pack, there is a need for technological development of a bus bar assembly that can maintain electrical insulation.

Summary of the Invention

Problems to be Solved by the Invention

[0014] The problem to be solved by the present invention is to provide a bus bar assembly that can maintain electrical insulation without melting even if a flame occurs inside the battery pack, and a battery pack including the same.

[0015] However, the problems to be solved by the embodiments of the present invention are not limited to the above-described problems, and are variously extended within the scope of the technical idea included in the present invention.

Means for Solving the Problems

[0016] A bus bar assembly according to an embodiment of the present invention includes a bus bar for guiding electrical connection inside a battery pack; a refractory silicon layer that wraps around the outer peripheral surface of the bus bar; and a glass fiber tape that wraps around the refractory silicon layer. A plurality of grooves are formed on the surface of the refractory silicon layer.

[0017] The grooves can be formed on the surface of the refractory silicon layer that faces the glass fiber tape.

[0018] A gas discharge path can be formed between the refractory silicon layer and the glass fiber tape by the grooves.

[0019] The grooves may be in a form that connects along a certain direction.

[0020] The grooves can include a first groove that connects along a first direction and a second groove that connects along a second direction that is perpendicular to the first direction.

[0021] The first direction may be parallel to the length direction of the bus bar.

[0022] The glass fiber tape can be wound around the refractory silicon layer a plurality of times along the length direction of the bus bar so as to form a layer in which at least some regions overlap.

[0023] The glass fiber tape can be wound around the refractory silicon layer a plurality of times obliquely so that a partial region between any one layer and another adjacent layer in the glass fiber tape overlaps.

[0024] The refractory silicon layer can contain a silicon material that is ceramized by high heat.

[0025] A battery pack according to an embodiment of the present invention includes at least one of the bus bar assemblies; a battery module; a BDU (battery disconnect unit) module for controlling the electrical connection of the battery module; and a BMS (Battery Management System) module for monitoring and controlling the operation of the battery module. At least one of the bus bar assemblies electrically connects any one of between the battery modules, between the battery module and the BDU module, between the battery module and the BMS module, or between the BDU module and the BMS module.

Advantages of the Invention

[0026] According to an embodiment of the present invention, a refractory silicon layer that is ceramized by high heat or flame and a glass fiber tape that wraps such a refractory silicon layer are provided in the bus bar assembly, and the electrical insulation of the bus bar assembly is maintained even if a flame occurs inside the battery pack.

[0027] In particular, a plurality of grooves are formed on the surface of the refractory silicon layer, and gases generated when the bus bar assembly is exposed to a flame can be quickly discharged.

[0028] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned should be clearly understood by those skilled in the art from the description of the claims.

Brief Description of the Drawings

[0029]

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Mode for Carrying Out the Invention

[0030] Hereinafter, with reference to the attached drawings, some embodiments of the present invention will be described in detail so that those having ordinary knowledge in the technical field to which the present invention belongs can easily implement them. The present invention can be implemented in various forms and is not limited to the embodiments described here.

[0031] For the sake of clarity in explaining the present invention, parts that are unnecessary for the explanation are omitted, and the same reference numerals are given to the same or similar components throughout the specification.

[0032] Also, the sizes and thicknesses of the respective configurations shown in the drawings are arbitrarily shown for the convenience of explanation, and the present invention is not necessarily limited to those shown. In the drawings, the thicknesses are enlarged to clearly represent some layers and regions. And in the drawings, for the convenience of explanation, the thicknesses of some layers and regions are exaggerated.

[0033] Also, when a part such as a layer, film, region, or plate is "above" or "on" another part, this includes not only the case where it is directly above the other part but also the case where there are other parts in between. Conversely, when a part is "directly above" another part, it means that there are no other parts in between. Also, being "above" or "on" a reference part means being located above or below the reference part, and does not necessarily mean being located "above" or "on" in the direction opposite to gravity.

[0034] Also, throughout the specification, when a part "includes" a certain component, this means that it can further include other components rather than excluding other components unless otherwise stated to the contrary.

[0035] Also, throughout the specification, when referring to "in a plane", this means when looking at the target part from above, and when referring to "in a cross-section", this means when looking at the cross-section obtained by vertically cutting the target part from the side.

[0036] FIG. 3 is a plan view showing a battery pack according to an embodiment of the present invention.

[0037] Referring to FIG. 3, a battery pack 1000 according to an embodiment of the present invention includes a busbar assembly 100; a battery module 1200; a BDU (battery disconnect unit) module 1300 for controlling the electrical connection of the battery module 1200; and a BMS (Battery Management System) module 1400 for monitoring and controlling the operation of the battery module 1200. At least one busbar assembly 100 according to this embodiment electrically connects at least one of between the battery modules 1200, between the battery module 1200 and the BDU module 1300, between the battery module 1200 and the BMS module 1400, or between the BDU module 1300 and the BMS module 1400. Specifically, a plurality of battery modules 1200 can be housed in the pack frame 1100, and the electrical connection between the battery modules 1200 and the electrical connection between the battery module 1200 and the BDU module 1300 can be performed by the busbar assembly 100. That is, the busbar assembly 100 according to this embodiment can be responsible for HV (High voltage) connection. Here, the HV connection is a connection of the role of a power source for supplying power that requires a high voltage, and means a connection between battery cells and a connection between battery modules.

[0038] The BDU module 1300 is a member for controlling the electrical connection of the battery module 1200, and can cut off the power supply between the power conversion device and the battery module 1200. When a condition that the current exceeds the set range occurs, the BDU module 1300 can cut off the power supply of the battery pack 1000 and ensure the safety of the battery pack 1000.

[0039] On the one hand, the LV connection member 100' according to this embodiment can be responsible for the electrical connection between the battery module 1200 and the BMS module 1400. The electrical connection here is an LV (Low voltage) connection, which means a sensing connection for sensing and controlling the voltage and temperature of the battery module 1200. Specifically, sensors inside the battery module 1200 are arranged, and the real-time temperature information and voltage information of the battery module 1200 are transmitted to the BMS module 1400 via the LV connection member 100'. The real-time operating state of the battery module 1200 can be monitored and controlled via the BMS module 1400. Specifically, although not shown in the figure, an HV current sensor may be integrated into the BMS module 1400. In this case, the busbar assembly according to this embodiment can be responsible for the electrical connection between the battery module 1200 and the BMS module 1400 or between the BDU module 1300 and the BMS module 1400.

[0040] Hereinafter, with reference to FIGS. 4 and 5, the battery module 1200 according to this embodiment will be described. However, the battery module 1200 described below is an exemplary structure of a battery module including a plurality of battery cells 11, and various forms of battery modules including a plurality of battery cells may be applied.

[0041] FIG. 4 is a perspective view showing one of the battery modules included in the battery pack of FIG. 3. FIG. 5 is a partial perspective view showing the state where the module frame and the end plate are removed from the battery module of FIG. 4.

[0042] Referring to FIGS. 4 and 5, the battery module 1200 according to this embodiment can include a battery cell stack 11A in which a plurality of battery cells 11 are stacked. The battery cell stack 11A is shown in FIG. 5. Such a battery cell stack 11A can be housed in the module frame 30 and the end plate 40.

[0043] The battery cell 11 may be a pouch-type battery cell. Such a pouch-type battery cell may be formed by encapsulating an electrode assembly in a pouch case made of a laminate sheet including a resin layer and a metal layer, and then fusing the outer periphery of the pouch case. Such a battery cell 11 may be formed with a rectangular sheet structure. Electrode leads 11L connected to the electrode assembly protrude outside the pouch case, and the electrode leads 11L of each battery cell 11 may be electrically connected to each other via a lead bus bar 21. Meanwhile, at least one electrode lead 11L may be connected to a terminal bus bar 22. A portion of the terminal bus bar 22 may be exposed to the outside of the battery module 1200, as shown in FIG. 4. The lead bus bar 21 and the terminal bus bar 22 may both include a metal material with excellent electrical conductivity.

[0044] The busbar assembly 100 according to this embodiment is electrically connected to the terminal busbar 22, and the above-described HV connection can be performed. That is, the battery module 1200 can be electrically connected to another battery module 1200, a BDU module 1300, or a BMS module 1400 via the busbar assembly 100 connected to the terminal busbar 22.

[0045] Hereinafter, a busbar assembly according to an embodiment of the present invention will be described in detail with reference to FIGS.

[0046] Fig. 6 is a plan view showing a state in which the glass fiber tape has been removed from a bus bar assembly according to an embodiment of the present invention. Fig. 7 is a cross-sectional view showing a cross section cut along the cutting line B-B' in Fig. 6. Fig. 8 is a plan view showing a state in which the glass fiber tape is wound around the bus bar assembly of Fig. 6. Fig. 9 is a cross-sectional view showing a cross section cut along the cutting line C-C' in Fig. 8.

[0047] Referring to FIGS. 6 to 9 together, a busbar assembly 100 according to an embodiment of the present invention includes a busbar 200 for guiding electrical connection inside a battery pack 1000; a refractory silicon layer 300 wrapping the outer peripheral surface of the busbar 200; and a glass fiber tape 400 wrapping the refractory silicon layer 300.

[0048] The busbar 200 is configured to guide the electrical connection of the battery module, that is, the HV connection, and can include a metal material with excellent electrical conductivity. As an example, the busbar 200 can include a copper (Cu) material. The busbar 200 may be a metal bar extending along the length direction (Ld).

[0049] The refractory silicon layer 300 can include a refractory silicon material. Specifically, the refractory silicon layer 300 can be formed by molding the refractory silicon material on the outer peripheral surface of the busbar 200. Such a refractory silicon layer 300 can wrap the outer peripheral surface of the busbar 200 except for a partial region at both ends of the busbar 200 connected to the terminal busbar 22 (see FIG. 4). The refractory silicon layer 300 having electrical insulation functions as an insulating layer to protect the busbar 200 and prevent the busbar 200 from contacting other electrical components or conductive members and causing a short circuit.

[0050] Unlike general silicon materials that are exposed to flames or burn at high temperatures, the refractory silicon material is a material that is exposed to flames or ceramified at high temperatures. The refractory silicon material can include a silicon polymer and silica. The applied silicon polymer may be a polysiloxane-based compound having a vinyl group as a functional group, and corresponds to the base material of the refractory silicon material. Silica may be fumed silica as a reinforcing filler contained in the silicon polymer. High-purity silicon chloride (SiCl4) compounds can be produced using metallic silicon as the main raw material through reactions with hydrochloric acid and purification processes, and fumed silica can be obtained by reacting this with hydrogen and oxygen in a high-temperature flame. Also, the refractory silicon material can include platinum (Pt) as a catalyst.

[0051] When the refractory silicon material is exposed to flames or high heat, cross-linking of silica (SiO2) occurs along with decomposition of the silicon polymer, forming a ceramic substance. The refractory silicon layer 300 according to this embodiment does not burn or melt even when exposed to internal flames or placed in a high-temperature environment, but can be ceramified to maintain electrical insulation.

[0052] The glass fiber tape 400 can include a base material layer containing glass fibers and an adhesive layer formed on one surface of such a base material layer. The glass fiber layer can be a woven body containing glass fibers, and the adhesive layer can contain at least one of an acrylic resin or a silicone resin. The glass fiber tape 400 may be a rectangular tape having a long side 400L and a short side 400S. That is, the long side 400L in this specification refers to the relatively long side in the rectangular tape, and the short side 400S refers to the relatively short side in the rectangular tape. Such a glass fiber tape 400 can wrap the refractory silicon layer 300 along the long side 400L of the glass fiber tape 400. Specifically, the glass fiber tape 400 can be wound around the refractory silicon layer 300 a plurality of times along the length direction (Ld) of the bus bar 200 so as to form layers 410 and 420 where at least some regions overlap. Here, the layers 410 and 420 of the glass fiber tape 400 correspond to an interlayer structure formed by overlapping at least some regions of adjacent portions of the glass fiber tape 400. More specifically, the glass fiber tape 400 can be wound around the refractory silicon layer 300 obliquely a plurality of times so that a partial region between any one layer 410 and another adjacent layer 420 in the glass fiber tape 400 overlaps. In FIG. 8, a partial region at both ends of the refractory silicon layer 300 is shown as being exposed without being wound by the glass fiber tape 400, but this is for the convenience of explanation, and the entire region of the refractory silicon layer 300 can be wrapped by the glass fiber tape 400.

[0053] The glass fiber tape 400 can protect the refractory silicon layer 300 from the flame. That is, the glass fiber tape 400 can completely wrap the refractory silicon layer 300 and primarily protect the refractory silicon layer 300 from the flame generated inside the battery pack.

[0054] In addition, the glass fiber tape 400 can complement the structural rigidity of the bus bar 200 and the refractory silicon layer 300, and improve the insulation performance with respect to the bus bar 200. Specifically, when the refractory silicon layer 300 is ceramified, the insulation is maintained, but the strength becomes weak, so the refractory silicon layer 300 may crack due to an external force. The glass fiber tape 400 can complement the rigidity of such a refractory silicon layer 300 and prevent the refractory silicon layer 300 from cracking due to an external force.

[0055] On the other hand, a plurality of grooves 300G (Groove) are formed on the surface of the refractory silicon layer 300 according to this embodiment. Specifically, the groove 300G can be formed on the surface of the refractory silicon layer 300 that faces the glass fiber tape 400. Further, the groove 300G may be in a form that is connected along a certain direction.

[0056] As an example, the groove 300G can include a first groove 300 (G1) that is connected along a first direction (d1) and a second groove 300 (G2) that is connected along a second direction (d2) that is perpendicular to the first direction (d1). The first direction (d1) may be a direction parallel to the length direction (Ld) of the bus bar 200. The first groove 300 (G1) is composed of a plurality, and the plurality of first grooves 300 (G1) can be spaced apart from each other along the second direction (d2). The second groove 300 (G2) is composed of a plurality, and the plurality of second grooves 300 (G2) can be spaced apart from each other along the first direction (d1). The first groove 300 (G1) and the second groove 300 (G2) can form a lattice pattern.

[0057] Specifically, although not shown in the drawings, as another example, the first groove 300 (G1) may be connected obliquely with a certain angle with respect to the length direction (Ld) of the bus bar 200.

[0058] When the busbar assembly 100 is exposed to a flame or becomes hot, gas may be generated from the adhesive layer between the refractory silicon layer 300 and the glass fiber tape 400. The gas generated from the refractory silicon layer 300 and the glass fiber tape 400 can accelerate the internal flame, inhibit the structural stability of the busbar assembly 100, and may adversely affect the insulation performance of the busbar 200. Specifically, if the generated gas clogs the closely adhered glass fiber tape 400 and cannot be discharged, a part of the portion wound around the glass fiber tape 400 may bulge, and eventually the glass fiber tape 400 may rupture and be damaged. If the glass fiber tape 400 is damaged, the refractory silicon layer 300 may also collapse without forming a dense structure, and ultimately the mechanical rigidity and electrical insulation of the busbar assembly 100 are inhibited. In addition, the gas generated from the refractory silicon layer 300 and the glass fiber tape 400 may contain carbonized components, and if the carbonized components accumulate inside, it will adversely affect the electrical insulation.

[0059] In contrast, in this embodiment, by forming a plurality of grooves 300G on the surface of the refractory silicon layer 300, the gas generated from the refractory silicon layer 300 and the glass fiber tape 400 in the event of a flame is quickly discharged. The grooves 300G can form a gas discharge path between the refractory silicon layer 300 and the glass fiber tape 400. That is, the busbar assembly 100 according to this embodiment is in the form of the glass fiber tape 400 wound around the refractory silicon layer 300 several times to ensure insulation and structural stability, but the gas generated in the flame situation can be easily discharged through the grooves 300G formed in the refractory silicon layer 300. Thereby, the structural stability and insulation of the busbar assembly 100 in a high-temperature and high-heat environment can be significantly improved.

[0060] Particularly, referring to FIG. 6, the gas (G1) generated between the refractory silicon layer 300 and the glass fiber tape 400 can be discharged along the path formed by the groove 300G formed on the surface of the refractory silicon layer 300. Also, referring to FIG. 8, as described above, the glass fiber tape 400 can be wound around the refractory silicon layer 300 obliquely multiple times such that a partial region between any one layer 410 and another adjacent layer 420 in the glass fiber tape 400 overlaps. At this time, the gas (G2) generated between any one layer 410 and another layer 420 in the glass fiber tape 400 can be discharged through the path between any one layer 410 and another layer 420. That is, the gas generated in the flame situation can be discharged to the outside of the bus bar assembly 100 through two types of paths.

[0061] On the other hand, referring again to FIG. 7, the depth (D) of the plurality of grooves 300G formed in the refractory silicon layer 300 can be 5% or more and 55% or less with respect to the thickness (T) of the refractory silicon layer 300. When the depth (D) of the plurality of grooves 300G is less than 5% with respect to the thickness (T) of the refractory silicon layer 300, the depth (D) of the groove 300G is too shallow, and the gas generated between the refractory silicon layer 300 and the glass fiber tape 400 may not be smoothly discharged. Also, when the depth (D) of the plurality of grooves 300G exceeds 55% with respect to the thickness (T) of the refractory silicon layer 300, the manufacturability of the manufacturing process for forming the plurality of grooves 300G becomes a problem, and the fire resistance and insulation properties of the refractory silicon layer 300 may decrease.

[0062] As an example, the refractory silicon layer 300 according to the present embodiment can have a thickness (T) of 1.5 mm or more and 3.5 mm or less in consideration of moldability and withstanding voltage performance. The depth (D) of the plurality of grooves 300G can be formed to be 0.2 mm or more and 0.8 mm in consideration of the degree of gas discharge and manufacturability of the manufacturing process. On the other hand, the number and width (W) of the plurality of grooves 300G can vary according to the width and thickness of the bus bar 200. As an example, the width (W) of the plurality of grooves 300G can be formed to be 0.5 mm or more and 1.5 mm or less.

[0063] Before this embodiment, terms indicating directions such as front, rear, left, right, up, and down were used, but such terms are for convenience of explanation and may vary depending on the position of the object and the position of the observer, etc.

[0064] One or more battery modules according to the foregoing embodiment can be mounted together with various control and protection systems such as a BMS (Battery Management System), a BDU (Battery Disconnect Unit), and a cooling system to form a battery pack.

[0065] The battery module and the battery pack can be applied to various devices. Specifically, they can be applied to transportation means such as electric bicycles, electric vehicles, hybrids, and ESS (Energy Storage System), but are not limited thereto, and can be applied to various devices that can use secondary batteries.

[0066] As described above, the desirable embodiments of the present invention have been described in detail. However, the scope of the rights of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention defined in the following claims also belong to the scope of the rights of the present invention.

Description of Reference Numerals

[0067] 100 Busbar Assembly 200 Busbar 300 Fireproof Silicon Layer 300G Groove 300G1 First Groove 300G2 Second Groove 400 Glass Fiber Tape 1000 Battery Pack 1100 Pack Frame 1200 Battery Module 1300 BDU Module 1400 BMS Module

Claims

1. A bus bar for guiding electrical connection inside a battery pack; A refractory silicon layer covering the outer peripheral surface of the bus bar; and A glass fiber tape covering the refractory silicon layer; comprising A bus bar assembly, wherein a plurality of grooves are formed on the surface of the refractory silicon layer.

2. The bus bar assembly according to claim 1, wherein the grooves are formed on the surface of the refractory silicon layer facing the glass fiber tape.

3. The bus bar assembly according to claim 1, wherein a gas discharge path is formed between the refractory silicon layer and the glass fiber tape by the grooves.

4. The bus bar assembly according to claim 1, wherein the grooves are connected in a form that extends along a certain direction.

5. The bus bar assembly according to claim 1, wherein the grooves include a first groove connected along a first direction and a second groove connected along a second direction which is perpendicular to the first direction.

6. The bus bar assembly according to claim 5, wherein the first direction is parallel to the length direction of the bus bar.

7. The bus bar assembly according to any one of claims 1 to 6, wherein the glass fiber tape is wound around the refractory silicon layer a plurality of times along the length direction of the bus bar so that at least a part of the regions form overlapping layers.

8. The bus bar assembly according to claim 7, wherein the glass fiber tape is wound around the refractory silicon layer diagonally a plurality of times so that a part of the region between any one layer and another adjacent layer in the glass fiber tape overlaps.

9. The bus bar assembly according to claim 1, wherein the refractory silicon layer contains a silicon material that is ceramized at high temperature.

10. At least one bus bar assembly according to claim 1; A battery module; A BDU module for controlling the electrical connection of the battery module; and A BMS module for monitoring and controlling the operation of the battery module comprising A battery pack, wherein at least one of the bus bar assemblies electrically connects at least one of between the battery modules, between the battery module and the BDU module, between the battery module and the BMS module, or between the BDU module and the BMS module.

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