Bus bar assembly and battery pack including the same

Abstract

A bus bar assembly according to an embodiment of the present invention comprises: a bus bar connected to a battery module inside a battery pack to guide an electrical connection of the battery module; the fireproof silicone layer wraps the outer surface of the bus bar; and a glass fiber tape wrapping the fire resistant silicone layer. The glass fiber tape comprises: a glass fiber layer; an adhesive portion as an adhesive-provided portion of one surface of the glass fiber layer; and a non-adhesive portion which is a portion of one surface of the glass fiber layer where the adhesive is not provided.

Description

Technical Field

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the priority of Korean Patent Application No. 10-2023-0004099 filed on January 11, 2023 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety.

[0003] The present disclosure 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

[0004] In modern society, as portable devices such as mobile phones, laptop computers, camcorders, and digital cameras have been used daily, the development of technology in the field related to the mobile devices as described above has been promoted. In addition, rechargeable / dischargeable secondary batteries are used as power sources for electric vehicles (EV), hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (P-HEV), etc., in an attempt to solve the air pollution caused by existing gasoline vehicles using fossil fuels, etc. Therefore, the demand for the development of secondary batteries is growing.

[0005] Currently 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 because they have advantages such as showing almost no memory effect compared to nickel-based secondary batteries and thus being freely charged and discharged, and having a very low self-discharge rate and high energy density.

[0006] Such lithium secondary batteries generally use lithium-based oxides and carbon materials as positive electrode active materials and negative electrode active materials, respectively. The lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate coated with a positive electrode active material and a negative electrode active material, respectively, are arranged with a separator sandwiched therebetween, and an external material or battery case sealably accommodates the electrode assembly together with an electrolyte.

[0007] According to the shape of external materials, generally lithium secondary batteries can be divided into can type secondary batteries in which an electrode assembly is incorporated into a metal can and pouch type batteries in which an electrode assembly is incorporated into a pouch of an aluminum laminate.

[0008] In the case of a secondary battery for a small device, two to three battery cells are provided, but in the case of a secondary battery for a medium and large device such as an automobile, a battery module in which a plurality of battery cells are electrically connected is used. In such a battery module, a plurality of battery cells are connected to each other in series or in parallel to form a battery assembly, thereby improving capacity and output. In addition, one or more battery modules may be installed 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.

[0009] In a battery pack configured to aggregate a plurality of battery modules, heat generated from a plurality of battery cells may be accumulated in a narrow space, so that the temperature may excessively rise more quickly. In other words, a battery module in which a plurality of battery cells are stacked and a battery pack equipped with these battery modules can obtain high output, but it is not easy to remove heat generated from the battery cells during charging and discharging. When heat dissipation of the battery cells is not properly performed or a thermal runaway phenomenon occurs in the battery cells, the possibility of explosion or fire increases.

[0010] Meanwhile, bus bars connected to the battery modules are provided inside the battery pack. Figure 1 is a plan view showing a conventional bus bar, Figure 2 is shown along Figure 1 A cross-sectional view of the cross section taken along the cutting line AA' in FIG.

[0011] Reference Figure 1 and Figure 2 , the conventional bus bar 20 is a rod-shaped metal part extending in the longitudinal direction, and through holes for connecting with the terminal bus bar of the battery module may be formed at both ends of the bus bar 20. Such a bus bar 20 is configured to be responsible for the HV (high voltage) connection in the battery pack. The HV connection refers to a connection used as a power source to supply power, and the bus bar 20 is configured to guide the electrical connection of the battery module and generally includes a metal material with excellent conductivity. As an example, the bus bar 20 may include a copper (Cu) material.

[0012] The cover member 20C may surround such a bus bar 20. The cover member 20C may include an electrically insulating material, for example, a silicone material or an epoxy resin material. Since the cover member 20C surrounds the bus bar 20 through which a high current flows, the bus bar 20 may be prevented from contacting other electrical devices or conductive members other than the terminal bus bar of the battery module, thereby interrupting the generation of a short circuit.

[0013] In recent years, the battery pack is required to have a device that does not eject flames to the outside of the battery pack even if a fire 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 surrounding the bus bar 20 may melt, so that the bus bar 20 may be exposed. If the exposed bus bar 20 contacts another electrical component or conductive member to cause a short circuit, the internal flame may spread further, and the flame may propagate to the outside of the battery pack. This may eventually lead to the explosion of the battery pack or a vehicle equipped with the battery pack.

[0014] Therefore, there is a need to develop a technology for a bus bar assembly that can maintain electrical insulation properties even if a fire occurs inside a battery pack. Summary of the invention

[0015] Technical issues

[0016] An object of the present invention is to provide a bus bar assembly which can maintain electrical insulation characteristics without melting even if a fire occurs inside the battery pack, and a battery pack including the same.

[0017] However, the technical problems to be solved by the embodiments of the present disclosure are not limited to the above-mentioned problems, and various extensions can be made within the scope of the technical ideas included in the present disclosure.

[0018] Technical Solution

[0019] According to one embodiment of the present disclosure, a busbar assembly is provided, comprising: a busbar, the busbar being used to guide electrical connections inside a battery pack; a fire-resistant silicone layer, the fire-resistant silicone layer surrounding the outer peripheral surface of the busbar; and a glass fiber tape, the glass fiber tape surrounding the fire-resistant silicone layer, wherein the glass fiber tape comprises: a glass fiber layer; an adhesive portion, the adhesive portion being a portion of one surface of the glass fiber layer on which an adhesive is provided; and a non-adhesive portion, the non-adhesive portion being a portion of the one surface of the glass fiber layer on which no adhesive is provided.

[0020] The adhesive portion and the non-adhesive portion may be composed of a plurality of portions, and the non-adhesive portion may be an empty space formed between the adhesive portions and where the glass fiber layer is exposed.

[0021] A gas exhaust path may be formed by the empty space of the non-adhesive portion.

[0022] The fiberglass tape may be a rectangular tape having a long side and a short side, and the fiberglass tape may surround the fire-resistant silicone layer along the long side of the fiberglass tape.

[0023] The adhesive portions and the non-adhesive portions may be alternately positioned along a direction parallel to a long side of the glass fiber tape.

[0024] The adhesive portion and the non-adhesive portion may be configured to extend in a direction parallel to a short side of the glass fiber tape.

[0025] The adhesive portion may be located on each short side of the fiberglass tape.

[0026] The glass fiber tape may be wound multiple times along the longitudinal direction of the bus bar to form overlapping layers in at least some regions.

[0027] The glass fiber tape may be obliquely wound around the fire-resistant silicone layer a plurality of times so that some areas between any one layer of the glass fiber tape and another layer adjacent thereto overlap.

[0028] The refractory silicone layer may include a silicone material that ceramizes at high temperatures.

[0029] According to another embodiment of the present disclosure, a battery pack is provided, comprising: at least one bus bar assembly as described above; a battery module; a BDU (battery disconnect unit) module, the BDU module being used to control the electrical connection of the battery module; and a BMS (battery management system) module, the BMS module monitoring and controlling the operation of the battery module, wherein the at least one bus bar assembly electrically connects at least one of 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.

[0030] Beneficial effects

[0031] According to an embodiment of the present disclosure, a refractory silicone layer ceramicized under high heat or flame and a glass fiber tape surrounding the refractory silicone layer are provided in the bus bar assembly so that the electrical insulation property of the bus bar assembly can be maintained even if a flame occurs inside the battery pack.

[0032] In particular, the adhesive portion and the non-adhesive portion are formed together in the glass fiber tape so that gas generated when the bus bar assembly is exposed to flames can be quickly discharged.

[0033] Effects obtainable from the present disclosure are not limited to the above-mentioned effects, and further other effects not mentioned herein will be clearly understood by those skilled in the art from the description of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a plan view showing a conventional bus bar.

[0035] Figure 2is shown along Figure 1 A cross-sectional view of the cross section taken along the cutting line AA' in FIG.

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

[0037] Figure 4 It is shown that the Figure 3 A three-dimensional view of one of the battery modules in a battery pack.

[0038] Figure 5 It is shown in Figure 4 A partial stereoscopic view of a battery module with the module frame and end plates removed.

[0039] Figure 6 is a plan view showing a state in which a glass fiber tape is removed in a bus bar assembly according to an embodiment of the present disclosure.

[0040] Figure 7 The glass fiber tape is shown wrapped around Figure 6 A plan view of the state of the bus bar assembly.

[0041] Figure 8 (a) and (b) are a plan view and a front view each showing a glass fiber tape according to an embodiment of the present disclosure.

[0042] Fig. 9 is shown along Figure 7 A cross-sectional view of the cross section taken along the cutting line BB' in FIG. DETAILED DESCRIPTION

[0043] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the embodiments. The present disclosure can be modified in various different ways and is not limited to the embodiments set forth herein.

[0044] For clarity, descriptions of parts not relevant to the explanation will be omitted, and the same reference numerals will be used throughout the description to denote the same or similar elements.

[0045] In addition, in the drawings, for the convenience of description, the size and thickness of each element are arbitrarily shown, and the present disclosure is not necessarily limited to those shown in the drawings. In the drawings, for the sake of clarity, the thickness, area, etc. of the layer are exaggerated. In the drawings, for the convenience of description, the thickness and area of ​​the components are magnified.

[0046] Furthermore, it should be understood that when an element such as a layer, film, region, or plate is referred to as being "on" or "over" another element, it can be directly on the other element, or intervening elements may also be present. Conversely, when an element is referred to as being "directly on" another element, this means that there are no other intervening elements. Furthermore, a portion being "on" or "over" a reference portion means a portion being above or below the reference portion, and does not specifically mean a portion being "on" or "over" in the opposite direction of gravity.

[0047] In addition, throughout the specification, when a part is referred to as “including” or “comprising” a certain part, it means that the part may further include other parts, without excluding the other parts, unless otherwise specified.

[0048] Furthermore, throughout the specification, when referred to as a “plane”, it means when the target portion is viewed from the upper side, and when referred to as a “cross section”, it means when the target portion is viewed from one side of the cross section cut vertically.

[0049] Figure 3 is a plan view showing a battery pack according to an embodiment of the present disclosure.

[0050] Reference Figure 3 , a battery pack 1000 according to one embodiment of the present disclosure includes: a bus bar 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, which monitors and controls the operation of the battery module 1200. At least one bus bar assembly 100 according to the present embodiment electrically connects at least one of the battery modules 1200, the battery module 1200 and the BDU module 1300, the battery module 1200 and the BMS module 1400, or the BDU module 1300 and the BMS module 1400. Specifically, a plurality of battery modules 1200 may be accommodated in a battery pack frame 1100, and the electrical connection between the battery modules 1200 or the electrical connection between the battery modules 1200 and the BDU module 1300 may be formed by the bus bar assembly 100. That is, the bus bar assembly 100 according to the present embodiment may be responsible for HV (high voltage) connection. Here, the HV connection is a power supply connection for supplying electric power requiring a high voltage, and refers to a connection between battery cells or a connection between battery modules.

[0051] Meanwhile, the BDU module 1300 is a member for controlling the electrical connection of the battery module 1200, and can cut off the power between the power converter and the battery module 1200. When a current exceeds a set range, the BDU module 1300 can cut off the power of the battery pack 1000 to ensure the safety of the battery pack 1000.

[0052] At the same time, the LV connecting member 100' according to the present embodiment can be responsible for the electrical connection between the battery module 1200 and the BMS module 1400. The electrical connection here is a LV (low voltage) connection, which means a sensing connection for detecting and controlling the voltage and temperature of the battery module 1200. Specifically, sensors and the like are arranged inside the battery module 1200, and the real-time temperature information or voltage information of the battery module 1200 is transmitted to the BMS module 1400 via the LV connecting member 100'. The real-time operating status of the battery module 1200 can be monitored and controlled by the BMS module 1400. Although not specifically shown, the HV current sensor can be integrated into the BMS module 1400. In this case, the bus bar assembly according to the present 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.

[0053] Next, we will refer to Figure 4 and Figure 5 A battery module 1200 according to the present embodiment is described. In this regard, the battery module 1200 described below has one exemplary structure of a battery module including a plurality of battery cells 11 , and various types of battery modules including a plurality of battery cells may be applied.

[0054] Figure 4 It is shown that the Figure 3 A three-dimensional view of one of the battery modules in a battery pack. Figure 5 It is shown in Figure 4 A partial stereoscopic view of a battery module with the module frame and end plates removed.

[0055] See also Figure 4 and Figure 5 , the battery module 1200 according to the present embodiment may include a battery cell stack 11A in which a plurality of battery cells 11 are stacked. Figure 5 Such a battery cell stack 11A may be accommodated in a module frame 30 and an end plate 40 .

[0056] The battery cell 11 may be a pouch-type battery cell. Such a pouch-type battery cell may be formed by housing an electrode assembly in a pouch shell made of a laminate sheet including a resin layer and a metal layer, and then fusing the outer peripheral portion of the pouch shell. Such a battery cell 11 may be formed into a rectangular sheet structure. The electrode lead 11L connected to the electrode assembly protrudes to the outside of the pouch shell, wherein the electrode lead 11L of each battery cell 11 may be electrically connected to each other via a lead bus bar 21. On the other hand, at least one electrode lead 11L may be connected to a terminal bus bar 22. As Figure 4As shown, a portion of the terminal bus bar 22 may be exposed to the outside of the battery module 1200. Both the lead bus bar 21 and the terminal bus bar 22 may include a metal material having excellent electrical conductivity.

[0057] The bus bar assembly 100 according to the present embodiment is electrically connected to such a terminal bus bar 22 , thereby enabling the above-mentioned HV connection. 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 bus bar assembly 100 connected to the terminal bus bar 22 .

[0058] Next, we will refer to Figures 6 to 9 A bus bar assembly according to an embodiment is described in detail.

[0059] Figure 6 is a plan view showing a state in which a glass fiber tape is removed in a bus bar assembly according to an embodiment of the present disclosure. Figure 7 The glass fiber tape is shown wrapped around Figure 6 A plan view of the state of the bus bar assembly. Figure 8 (a) and (b) are a plan view and a front view each showing a glass fiber tape according to an embodiment of the present disclosure. Fig. 9 is shown along Figure 7 A cross-sectional view of the cross section taken along the cutting line BB' in FIG.

[0060] Refer to Figures 6 to 9 , a bus bar assembly 100 according to an embodiment of the present disclosure includes a bus bar 200 for guiding electrical connection within a battery pack 1000 ; a fire-resistant silicone layer 300 surrounding an outer peripheral surface of the bus bar 200 ; and a glass fiber tape 400 surrounding the fire-resistant silicone layer 300 .

[0061] The bus bar 200 is configured to guide the electrical connection of the battery module, ie, the HV connection, and may include a metal material having excellent conductivity. As an example, the bus bar 200 may include a copper (Cu) material. The bus bar 200 may be a metal rod extending in the longitudinal direction Ld.

[0062] The fire-resistant silicone layer 300 may include a fire-resistant silicone material. Specifically, the fire-resistant silicone material may be molded onto the outer peripheral surface of the bus bar 200, thereby forming the fire-resistant silicone layer 300. The fire-resistant silicone layer 300 may surround the outer peripheral surface of the bus bar 200, except for the portion of the bus bar 200 connected to the terminal bus bar 22 (see Figure 4 ) at both ends. The fire-resistant silicone layer 300 having electrical insulating properties serves as an insulating layer to protect the bus bar 200, thereby preventing the bus bar 200 from contacting other electrical devices or conductive members and causing a short circuit.

[0063] Refractory silicone materials are materials that ceramicize when exposed to flames or under high heat, which are different from ordinary silicone materials that burn when exposed to flames or at high temperatures. Refractory silicone materials may include silicone polymers and silicon dioxide. The silicone polymer used may be a polysilicone-based compound having vinyl as a functional group, and corresponds to the base material of the refractory silicone material. Silicon dioxide may be fumed silica, which is a reinforcing filler contained in a silicone polymer. With metallic silicon as the main raw material, a high-purity silicon chloride (SiCl4) compound can be obtained by reacting with hydrochloric acid and a purification process, which can react with hydrogen and oxygen in a high-temperature flame to obtain fumed silica. In addition, the refractory silicone material may contain platinum Pt as a catalyst.

[0064] When the refractory silicone material is exposed to flame or high heat, silicon dioxide (SiO2) cross-links together, and the silicone polymer decomposes to form a ceramic material. The refractory silicone layer 300 according to the present embodiment does not burn or melt, but can be ceramicized and maintain electrical insulation properties even when exposed to flame or placed in a high temperature environment.

[0065] The glass fiber tape 400 may include a glass fiber layer and an adhesive layer formed on one surface of the glass fiber layer. The glass fiber layer may be a woven fabric containing glass fibers, and the adhesive layer may include at least one of an acrylic resin or a silicone resin. The adhesive layer may 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 here refers to the relatively long side of the rectangular tape, and the short side 400S refers to the relatively short side of the rectangular tape. Such a glass fiber tape 400 may surround the fire-resistant silicone layer 300 along the long side 400L of the glass fiber tape 400. Specifically, the glass fiber tape 400 may be wound around the fire-resistant silicone layer 300 multiple times along the longitudinal direction Ld of the busbar 200, thereby forming overlapping layers 410 and 420 in at least some regions. Here, the layers 410 and 420 of the glass fiber tape 400 correspond to a sandwich structure formed by overlapping at least some regions of the portions of the glass fiber tape 400 adjacent to each other. More specifically, the glass fiber tape 400 may be obliquely wound around the fire-resistant silicone layer 300 a plurality of times so that some areas between any one layer 410 of the glass fiber tape 400 and another layer 420 adjacent thereto overlap. Figure 7 , some areas of both end portions of the fire-resistant silicone layer 300 are shown as being exposed without being wrapped with the glass fiber tape 400 , however this is for convenience of explanation, and the entire area of ​​the fire-resistant silicone layer 300 may be wrapped with the glass fiber tape 400 .

[0066] The glass fiber tape 400 can protect the fire-resistant silicone layer 300 from the flame. That is, the glass fiber tape 400 completely surrounds the fire-resistant silicone layer 300 and can temporarily protect the fire-resistant silicone layer 300 from the flame generated inside the battery pack.

[0067] In addition, the glass fiber tape 400 can supplement the structural rigidity of the bus bar 200 and the refractory silicone layer 300 to improve the insulation performance of the bus bar 200. Specifically, when the refractory silicone layer 300 is ceramicized, the insulation performance is maintained but the strength is weakened, so that the refractory silicone layer 300 may be damaged by external force. The glass fiber tape 400 can supplement the rigidity of the refractory silicone layer 300 and prevent the refractory silicone layer 300 from being damaged by external force.

[0068] Meanwhile, the glass fiber tape 400 according to the present embodiment includes a glass fiber layer 400a, an adhesive portion 400b as a portion of one surface of the glass fiber layer 400a provided with an adhesive, and a non-adhesive portion 400c as a portion of one surface of the glass fiber layer 400a not provided with an adhesive. Specifically, the glass fiber layer 400a is a substrate layer containing glass fibers, and an adhesive having an adhesive component may be applied to one surface of the glass fiber layer 400a to form the adhesive portion 400b. The non-adhesive portion 400c corresponds to a portion to which no adhesive is applied and a portion of the glass fiber layer 400a is exposed. In this specification, for ease of explanation, the portion of the glass fiber layer 400a partially exposed is referred to as the non-adhesive portion 400c. The glass fiber layer 400a may be a woven fabric containing glass fibers, and the adhesive portion 400b may include at least one of an acrylic resin or a silicone resin.

[0069] The adhesive portion 400 b and the non-adhesive portion 400 c may be composed of a plurality of portions, wherein the non-adhesive portion 400 c may correspond to an empty space formed between the adhesive portions 400 b and where the glass fiber layer 400 a is exposed.

[0070] As described above, the glass fiber tape 400 may be a rectangular tape having a long side 400L and a short side 400S, and the glass fiber tape 400 may be wound around the fire-resistant silicone layer 300 multiple times along the long side 400L of the glass fiber tape 400. Here, the adhesive portion 400b and the non-adhesive portion 400c may be alternately arranged in a direction parallel to the long side 400L of the glass fiber tape 400. In addition, the adhesive portion 400b and the non-adhesive portion 400c may extend in 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 may form a stripe pattern in a direction parallel to the long side 400L of the glass fiber tape 400.

[0071] When the bus bar assembly 100 is exposed to flames or reaches high temperatures, gas may be generated from the fire-resistant silicone layer 300 and the adhesive portion 400b of the glass fiber tape 400. The gas generated by the fire-resistant silicone layer 300 and the glass fiber tape 400 may accelerate the internal flame, damage the structural stability of the bus bar assembly 100, and thus adversely affect the insulation performance of the bus bar 200. Specifically, if the generated gas is blocked by the tightly attached glass fiber tape 400 and is not discharged, some parts wrapped around the glass fiber tape 400 may expand, and the glass fiber tape 400 may eventually burst and be damaged. If the glass fiber tape 400 is damaged, the fire-resistant silicone layer 300 may collapse without forming a dense structure, ultimately damaging the mechanical rigidity and electrical insulation of the bus bar assembly 100. In addition, the gas generated by the fire-resistant silicone layer 300 and the glass fiber tape 400 may contain carbonized components. If the carbonized components accumulate inside, they have an adverse effect on electrical insulation.

[0072] In the present 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 event that a flame has occurred, the gas generated from the fire-resistant silicone 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 bus bar assembly 100 according to the present embodiment is configured so that the glass fiber tape 400 is wound around the fire-resistant silicone layer 300 multiple times to ensure insulation properties and structural stability. The gas generated in the event of a flame can be easily discharged through the non-adhesive portion 400b, which is an empty space. Therefore, the structural stability and insulation performance of the bus bar assembly 100 under high temperature and high temperature environments can be greatly improved.

[0073] In particular, if Fig. 9 As shown, the glass fiber tape 400 may be wound multiple times into a plurality of layers 410 and 420. If the non-adhesive portion 400c is not provided, since the glass fiber tape 400 is blocked by the plurality of layers 410 and 420, it is difficult for the gas generated from the fire-resistant silicone layer 300 or the glass fiber tape 400 to be discharged. In the case of the present embodiment, the gas G may be discharged through the empty space S of the non-adhesive portion 400c between the adhesive portions 400b in the inner region of the previously wound layer 410 of the glass fiber tape 400. In addition, even in the outer region of the previously wound layer 410 of the glass fiber tape 400, the gas G may be discharged through the empty space S of the non-adhesive portion 400c between the adhesive portions 400b. As shown in FIG. Figure 7 As shown, the gas G flowing along the empty space S of the non-adhesive portion 400 c is eventually discharged to the outside through a path between one layer 410 and another layer 420 .

[0074] 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 wrapped around the fire-resistant silicone layer 300 multiple times along the long side 400L of the glass fiber tape 400, a gas exhaust path can be ensured.

[0075] Reference again Figure 7 and Figure 8 (a) and (b), the adhesive portion 400b may be located on each short side 400S of the glass fiber tape 400 and may be completely adhered to the end of the glass fiber tape 400. That is, in order to prevent the wound glass fiber tape 400 from unwinding, the short side 400S of the glass fiber tape 400 may be formed as the adhesive portion 400b.

[0076] Meanwhile, as an example, the ratio of the width W1 of the adhesive portion 400b to the width W2 of the non-adhesive portion 400c may be greater than 0.5 and less than 3.5. If the ratio of the width W1 of the adhesive portion 400b to the width W2 of the non-adhesive portion 400c is less than 0.5, the area of ​​the adhesive portion 400b is relatively insufficient, so that the bonding strength of the glass fiber tape 400 may not be strong enough. In addition, when the ratio of the width W1 of the adhesive portion 400b to the width W2 of the non-adhesive portion 400c is greater than 3.5, the area of ​​the non-adhesive portion 400c may be too narrow to effectively discharge gas.

[0077] In this embodiment, terms indicating directions such as the front side, the back side, the left side, the right side, the upper side, and the lower side are used, but the terms used are provided only for the convenience of description and may become different depending on the position of the object, the position of the observer, etc.

[0078] One or more battery modules according to the embodiments of the present disclosure described above may be installed 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.

[0079] The battery module or battery pack can be applied to various devices. Specifically, it can be applied to vehicle devices such as electric bicycles, electric vehicles and hybrid electric vehicles, or to ESS (energy storage system), and can be applied to various devices that can use secondary batteries, without limitation.

[0080] Although the present invention has been described in detail with reference to the preferred embodiments of the present invention, the scope of the present disclosure is not limited thereto, and those skilled in the art may make various modifications and improvements using the basic concept of the present disclosure, which is defined by the appended claims and also falls within the scope of the present disclosure.

[0081] [Explanation of Reference Numerals]

[0082] 100: Busbar assembly

[0083] 200: Busbar

[0084] 300: Fire-resistant silicone layer

[0085] 400: Fiberglass tape

[0086] 400a: Glass fiber layer

[0087] 400b: Adhesive part

[0088] 400c: Non-adhesive part

[0089] 1000: Battery Pack

[0090] 1100: Battery Pack Frame

[0091] 1200: Battery module

[0092] 1300: BDU module

[0093] 1400: BMS module

Claims

1. A bus bar assembly, comprising: A bus bar used to guide electrical connections inside the battery pack; a fire-resistant silicone layer surrounding an outer peripheral surface of the bus bar; as well as a fiberglass tape surrounding the fire-resistant silicone 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 the one surface of the glass fiber layer not provided with an adhesive.

2. The bus bar assembly according to claim 1, wherein: The adhesive portion and the non-adhesive portion are composed of multiple parts, and The non-adhesive portion is an empty space formed between the adhesive portions and where the glass fiber layer is exposed.

3. The bus bar assembly according to claim 2, wherein: A gas exhaust path is formed by the empty space of the non-adhesive portion.

4. The bus bar assembly according to claim 2, wherein: The fiberglass tape is a rectangular tape having a long side and a short side, and The fiberglass tape surrounds the fire-resistant silicone layer along long sides of the fiberglass tape.

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

6. The bus bar assembly according to claim 4, wherein: The adhesive portion and the non-adhesive portion are configured to extend in a direction parallel to a short side of the glass fiber tape.

7. The bus bar assembly according to claim 4, wherein: The adhesive portion is located on each short side of the fiberglass tape.

8. The bus bar assembly according to claim 1, wherein: The glass fiber tape is wound multiple times along the longitudinal direction of the bus bar to form overlapping layers in at least some regions.

9. The bus bar assembly according to claim 8, wherein: The glass fiber tape is obliquely wound around the fire-resistant silicone layer a plurality of times so that some areas between any one layer of the glass fiber tape and another layer adjacent thereto overlap.

10. The bus bar assembly of claim 1, wherein: The refractory silicone layer includes a silicone material that ceramizes at high temperatures.

11. A battery pack, comprising: at least one bus bar assembly, the at least one bus bar assembly being a bus bar assembly according to any one of claims 1; Battery modules; A BDU (Battery Disconnect Unit) module, the BDU module is used to control the electrical connection of the battery module; as well as A BMS (Battery Management System) module that monitors and controls the operation of the battery module, The at least one bus bar assembly electrically connects at least one of the battery modules, the battery module and the BDU module, the battery module and the BMS module, or the BDU module and the BMS module.

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