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. The glass fiber tape includes a glass fiber layer, an adhesive portion which is a portion of one surface of the glass fiber layer provided with an adhesive, and a non-adhesive portion which is a portion of one surface of the glass fiber layer not provided with an adhesive.

Description

Technical Field

[0001] [Cross - Reference to Related Applications] This application claims the benefit of priority based on Korean Patent Application No. 10 - 2023 - 0004099 filed on January 11, 2023, and all the contents disclosed in the literature of the Korean patent application are incorporated herein by reference.

[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 with 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, notebook computers, 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 using 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 of 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 coated with such positive electrode active material and negative electrode active material are arranged 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 to 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 in 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 assembled, the heat generated from the 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, high output can be obtained. However, if the heat dissipation of the battery cells is not properly performed or a 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 longitudinal 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 the battery pack. The HV connection means the connection of the power supply 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] The covering member 20C can wrap such a bus bar 20. The covering member 20C can include an electrically insulating material, and as an example, it 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 the battery pack, equipment is required that does not allow flames 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. The glass fiber tape includes a glass fiber layer, an adhesive portion that is a portion of one surface of the glass fiber layer provided with an adhesive, and a non-adhesive portion that is a portion of one surface of the glass fiber layer not provided with an adhesive.

[0017] The adhesive portion and the non-adhesive portion may be configured in plurality, and the non-adhesive portion may be a free space formed between the adhesive portions and exposing the glass fiber layer.

[0018] A gas discharge path may be formed by the free space of the non-adhesive portion.

[0019] The glass fiber tape may be a rectangular tape having a long side and a short side, and the glass fiber tape may wrap around the refractory silicon layer along the long side of the glass fiber tape.

[0020] The adhesive portion and the non-adhesive portion may be alternately positioned along a direction parallel to the long side of the glass fiber tape.

[0021] The adhesive portion and the non-adhesive portion may be in a form extending along a direction parallel to the short side of the glass fiber tape.

[0022] The adhesive portions can be located on each of the short sides of the glass fiber tape.

[0023] The glass fiber tape can be wound a plurality of times along the length direction of the bus bar so as to form layers in which at least some regions overlap.

[0024] The glass fiber tape can be wound around the refractory silicon layer a plurality of times obliquely so that a partial region between any layer in the glass fiber tape and another adjacent layer overlaps.

[0025] The refractory silicon layer can include a silicon material that is ceramified at high heat.

[0026] 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

[0027] According to an embodiment of the present invention, a refractory silicon layer that is ceramified 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.

[0028] In particular, an adhesive portion and a non-adhesive portion are both formed of the glass fiber tape, and gases generated when the bus bar assembly is exposed to a flame can be quickly discharged.

[0029] 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

[0030]

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Modes for Carrying Out the Invention

[0031] 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 pertains can easily implement them. The present invention can be implemented in various forms and is not limited to the embodiments described herein.

[0032] For the purpose of clearly explaining the present invention, parts that are not necessary for the explanation are omitted, and the same reference numerals are given to the same or similar components throughout the specification.

[0033] In addition, the sizes and thicknesses of the respective components shown in the drawings are arbitrarily shown for the convenience of explanation, and thus the present invention is not necessarily limited to those shown. In the drawings, the thicknesses are enlarged to clearly show some layers and regions. And in the drawings, for the convenience of explanation, the thicknesses of some layers and regions are exaggeratedly shown.

[0034] Also, when a part such as a layer, film, region, or plate is "on" or "above" 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 "on" or "above" a reference part means being located above or below the reference part, and does not necessarily mean being located "on" or "above" in the direction opposite to gravity.

[0035] Also, throughout the specification, when a part "includes" a certain component, this means that other components can be further included, rather than excluding other components unless otherwise stated to the contrary.

[0036] Also, throughout the specification, when it is "in a plane", this means when the target part is viewed from above, and when it is "in a cross-section", this means when the cross-section obtained by vertically cutting the target part is viewed from the side.

[0037] FIG. 3 is a plan view showing a battery pack according to an embodiment of the present invention.

[0038] 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 the connection of the power supply for supplying power that requires a high voltage, and means the connection between battery cells and the connection between battery modules.

[0039] On the other hand, 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 occurs where the current exceeds the set range, the BDU module 1300 can cut off the power supply of the battery pack 1000 and ensure the safety of the battery pack 1000.

[0040] 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.

[0041] 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.

[0042] 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 battery module of FIG. 4 with the module frame and end plate removed.

[0043] 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.

[0044] The battery cell 11 can be a pouch-type battery cell. Such a pouch-type battery cell can be formed by housing 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 peripheral portion of the pouch case. Such a battery cell 11 can be formed in a rectangular sheet structure. The electrode lead 11L connected to the electrode assembly protrudes outside the pouch case, and the electrode leads 11L of each battery cell 11 can be electrically connected to each other through the lead bus bar 21. On the other hand, at least one electrode lead 11L can be connected to the terminal bus bar 22. A part of the terminal bus bar 22 can be exposed outside the battery module 1200 as shown in FIG. 4. The lead bus bar 21 and the terminal bus bar 22 can all include a metal material excellent in electrical conductivity.

[0045] The bus bar assembly 100 according to the present embodiment is electrically connected to such a terminal bus bar 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, the BDU module 1300, or the BMS module 1400 through the bus bar assembly 100 connected to the terminal bus bar 22.

[0046] Hereinafter, with reference to FIGS. 6 to 9, the bus bar assembly according to an embodiment of the present invention will be described in detail.

[0047] FIG. 6 is a plan view showing a bus bar assembly according to an embodiment of the present invention from which a glass fiber tape has been removed. FIG. 7 is a plan view showing the bus bar assembly of FIG. 6 around which a glass fiber tape is wound. FIGS. 8(a) and 8(b) are a plan view and a front view, respectively, showing a glass fiber tape according to an embodiment of the present invention. FIG. 9 is a cross-sectional view showing a cross-section taken along the cutting line B-B' of FIG. 7.

[0048] Referring to FIGS. 6 to 9 together, a bus bar assembly 100 according to an embodiment of the present invention includes a bus bar 200 for guiding electrical connection inside a battery pack 1000; a refractory silicon layer 300 wrapping the outer peripheral surface of the bus bar 200; and a glass fiber tape 400 wrapping the refractory silicon layer 300.

[0049] The bus bar 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 bus bar 200 can include a copper (Cu) material. The bus bar 200 may be a metal bar extending along the length direction (Ld).

[0050] 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 bus bar 200. Such a refractory silicon layer 300 can wrap the outer peripheral surface of the bus bar 200 except for a partial region at both ends of the bus bar 200 connected to the terminal bus bar 22 (see FIG. 4). The refractory silicon layer 300 having electrical insulation functions as an insulating layer for protecting the bus bar 200 and prevents the bus bar 200 from contacting other electrical components or conductive members to cause a short circuit.

[0051] 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 silicon polymer to be applied 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.

[0052] When the refractory silicon material is exposed to flames or high temperatures, 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, even when placed in a high-temperature environment by an internal flame, does not burn or melt, but can be ceramified and maintain electrical insulation.

[0053] The glass fiber tape 400 can include a glass fiber layer and an adhesive layer formed on one surface of such a glass fiber 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 adhesive layer can include an adhesive portion and a non-adhesive portion, which will be described later. 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 silicone 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 silicone 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 silicone 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. 7, a partial region at both ends of the refractory silicone 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 silicone layer 300 can be wrapped by the glass fiber tape 400.

[0054] The glass fiber tape 400 can protect the refractory silicone layer 300 from the flame. That is, the glass fiber tape 400 can completely wrap the refractory silicone layer 300 and primarily protect the refractory silicone layer 300 from the flame generated inside the battery pack.

[0055] In addition, the glass fiber tape 400 can complement the structural rigidity of the bus bar 200 and the fire-resistant silicon layer 300, and improve the insulation performance with respect to the bus bar 200. Specifically, when the fire-resistant silicon layer 300 is ceramified, the insulation is maintained, but the strength becomes weak, so the fire-resistant silicon layer 300 may be cracked by an external force. The glass fiber tape 400 can complement the rigidity of such a fire-resistant silicon layer 300 and prevent the fire-resistant silicon layer 300 from cracking due to an external force.

[0056] On the other hand, the glass fiber tape 400 according to the present embodiment includes a glass fiber layer 400a, an adhesive portion 400b which is a portion provided with an adhesive on one surface of the glass fiber layer 400a, and a non-adhesive portion 400c which is a portion not provided with an adhesive on one surface of the glass fiber layer 400a. Specifically, the glass fiber layer 400a is a base material layer containing glass fibers, and an adhesive having an adhesive component can be applied to one surface of such a glass fiber layer 400a to form the adhesive portion 400b. The non-adhesive portion 400c corresponds to a portion where the adhesive is not applied and a part of the glass fiber layer 400a is exposed. In this specification, for convenience of explanation, the portion where a part of the glass fiber layer 400a is exposed is named as the non-adhesive portion 400c. The glass fiber layer 400a can be a woven body containing glass fibers, and the adhesive portion 400b can contain at least one of an acrylic resin or a silicone resin.

[0057] The adhesive portion 400b and the non-adhesive portion 400c can be configured in plurality, and the non-adhesive portion 400c can be formed between the adhesive portions 400b and correspond to the empty space where the glass fiber layer 400a is exposed.

[0058] As described above, the glass fiber tape 400 can be a rectangular tape having a long side 400L and a short side 400S, and the glass fiber tape 400 can wrap the refractory silicon layer 300 a plurality of times along the long side 400L of the glass fiber tape 400. Here, the adhesive portion 400b and the non-adhesive portion 400c can be alternately positioned along a direction parallel to the long side 400L of the glass fiber tape 400. Further, the adhesive portion 400b and the non-adhesive portion 400c can be in a form extending along a direction parallel to the short side 400S of the glass fiber tape 400. That is, in the glass fiber tape 400 according to the present embodiment, the adhesive portion 400b and the non-adhesive portion 400c can form a stripe pattern along a direction parallel to the long side 400L of the glass fiber tape 400.

[0059] When the bus bar assembly 100 is exposed to a flame or becomes hot, gas may be generated from the adhesive portion 400b of 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 bus bar assembly 100, and may adversely affect the insulation performance with respect to the bus bar 200. Specifically, if the generated gas accumulates in the adhered glass fiber tape 400 and is not discharged, a part of the portion wound around the glass fiber tape 400 may bulge, and eventually the glass fiber tape 400 may burst and be damaged. If the glass fiber tape 400 is damaged, the refractory silicon layer 300 may also collapse without being able to form a dense structure, and ultimately the mechanical rigidity and electrical insulation of the bus bar assembly 100 are inhibited. Further, the gas generated from the refractory silicon layer 300 and the glass fiber tape 400 may contain a carbonized component, and if the carbonized component accumulates inside, it will have an adverse effect on the electrical insulation.

[0060] In this embodiment, the adhesive layer of the glass fiber tape 400 is composed of an adhesive portion 400b and a non - adhesive portion 400c, so that in the situation where a flame occurs, the gas generated from the refractory silicon layer 300 or the glass fiber tape 400 can be quickly discharged. The gas discharge path can be formed by the empty space of the non - adhesive portion 400b. That is, the busbar assembly 100 according to this embodiment is in the form of winding the glass fiber tape 400 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 non - adhesive portion 400b which is an empty space. Thereby, the structural stability and insulation of the busbar assembly 100 in a high - temperature and high - heat environment can be significantly enhanced.

[0061] In particular, as shown in FIG. 9, the glass fiber tape 400 may be wound several times in a form of a plurality of layers 410, 420. If the non - adhesive portion 400c is not provided, the gas generated in the refractory silicon layer 300 or the glass fiber tape 400 is blocked by the plurality of layers 410, 420 of the glass fiber tape 400 and is difficult to be discharged. In the case of this embodiment, in the inner region of one layer 410 wound first on the glass fiber tape 400, the gas (G) can be discharged through the empty space S of the non - adhesive portion 400c between the adhesive portions 400b. Also, in the outer region of one layer 410 wound first on the glass fiber tape 400, the gas (G) can be discharged through the empty space S of the non - adhesive portion 400c between the adhesive portions 400b. The gas (G) flowing along the empty space S of the non - adhesive portion 400c can finally be discharged to the outside through the path between any one layer 410 and another layer 420 as shown in FIG. 7.

[0062] In particular, as described above, since the adhesive portion 400b and the non - adhesive portion 400c form a stripe pattern along the long side 400L of the glass fiber tape 400, even if the glass fiber tape 400 is wound around the refractory silicon layer 300 a plurality of times along the long side 400L of the glass fiber tape 400, a gas discharge path can be ensured.

[0063] Referring again to FIGS. 7(a) and 8(b), the bonding portions 400b can be located at the respective short sides 400S of the glass fiber tape 400, and can be completely bonded to the ends of the glass fiber tape 400. That is, in order to prevent the wound glass fiber tape 400 from coming loose, the short sides 400S of the glass fiber tape 400 can be formed by the bonding portions 400b.

[0064] On the other hand, as an example, the ratio of the width (W1) of the bonding portion 400b to the width (W2) of the non-bonding portion 400c may be 0.5 or more and 3.5 or less. In case the ratio of the width (W1) of the bonding portion 400b to the width (W2) of the non-bonding portion 400c is less than 0.5, the area of the bonding portion 400b is relatively insufficient, and the adhesive force of the glass fiber tape 400 may not be sufficiently ensured. Also, when the ratio of the width (W1) of the bonding portion 400b to the width (W2) of the non-bonding portion 400c exceeds 3.5, the area of the non-bonding portion 400c is too narrow and gas discharge may not be effectively performed.

[0065] In the present embodiment, terms indicating directions such as front, rear, left, right, up, and down are used, but such terms are for convenience of explanation and may vary depending on the position of the object to be observed and the position of the observer.

[0066] One or more battery modules according to the present embodiment described above 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.

[0067] The battery module and the battery pack can be applied to various devices. Specifically, it can be applied to transportation means such as electric bicycles, electric vehicles, hybrids, and ESS (Energy Storage System), but is not limited thereto, and is applicable to various devices that can use secondary batteries.

[0068] Although the preferred embodiments of the present invention have been described in detail above, the scope of the rights of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concepts of the present invention defined in the following claims also belong to the scope of the rights of the present invention.

Explanation of Signs

[0069] 100 Busbar Assembly 200 Busbar 300 Refractory Silicon Layer 400 Glass Fiber Tape 400a Glass Fiber Layer 400b Adhesive Portion 400c Non - adhesive Portion 1000 Battery Pack 1100 Pack Frame 1200 Battery Module 1300 BDU Module 1400 BMS Module

Claims

1. A bus bar for guiding electrical connections inside a battery pack; A refractory silicon layer wrapping the outer peripheral surface of the bus bar; and A glass fiber tape wrapping the refractory silicon layer; comprising The glass fiber tape includes a glass fiber layer, an adhesive portion which is a portion on one side of the glass fiber layer provided with an adhesive, and a non-adhesive portion which is a portion on one side of the glass fiber layer not provided with an adhesive, a bus bar assembly.

2. The adhesive portion and the non-adhesive portion are composed of a plurality of parts, The non-adhesive portion is a space formed between the adhesive portions where the glass fiber layer is exposed, the bus bar assembly according to Claim 1.

3. A gas discharge path is formed by the empty space of the non-adhesive portion, the bus bar assembly according to Claim 2.

4. The glass fiber tape is a rectangular tape having a long side and a short side, The glass fiber tape wraps the refractory silicon layer along the long side of the glass fiber tape, the bus bar assembly according to Claim 2.

5. The adhesive portion and the non-adhesive portion are alternately positioned along a direction parallel to the long side of the glass fiber tape, the bus bar assembly according to Claim 4.

6. The adhesive portion and the non-adhesive portion are in a form extending along a direction parallel to the short side of the glass fiber tape, the bus bar assembly according to Claim 4.

7. The adhesive portion is located at each of the short sides of the glass fiber tape, the bus bar assembly according to Claim 4.

8. The glass fiber tape is wound a plurality of times along the length direction of the bus bar so as to form layers where at least some regions overlap, the bus bar assembly according to any one of Claims 1 to 7.

9. The glass fiber tape is wound around the refractory silicon layer obliquely a plurality of times so that a partial region between any one layer of the glass fiber tape and another adjacent layer overlaps, the bus bar assembly according to Claim 8.

10. The refractory silicon layer includes a silicon material that is ceramized at high heat, the bus bar assembly according to Claim 1.

11. 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, At least one of the bus bar assemblies is a battery pack that 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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