Busbar assembly and battery pack including same

Abstract

A bus bar assembly according to one embodiment of the present invention includes a body portion including a bent portion, bus bars extending from both ends of the body portion and including end portions with through holes formed therein, an insulating layer insert injection molded to surround the body portion, and caps surrounding the end portions.

Description

[Technical Field]

[0001] [CROSS-REFERENCE TO RELATED APPLICATIONS] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0086265, filed on July 4, 2023, and all contents disclosed in the documents of this Korean patent application are incorporated herein by reference.

[0002] The present invention relates to a busbar assembly and a battery pack including the same, and more particularly to a busbar assembly with improved insulation stability and a battery pack including the same. [Background technology]

[0003] In modern society, the use of portable devices such as mobile phones, laptops, video cameras, and digital cameras has become commonplace, and active development is being conducted into technologies related to these mobile devices. Furthermore, rechargeable secondary batteries are a solution to address air pollution caused by existing gasoline-powered 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., which has led to an increasing need for development of secondary batteries.

[0004] Currently, commercially available secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, and lithium secondary batteries. Of these, lithium secondary batteries are attracting attention because they have advantages over nickel-based secondary batteries, such as almost no memory effect, the ability to be charged and discharged freely, an extremely low self-discharge rate, and a high energy density.

[0005] Such lithium secondary batteries mainly use lithium-based oxides and carbon materials as the positive and negative electrode active materials, respectively, and include an electrode assembly in which a positive electrode plate and a negative electrode plate, each coated with the positive and negative electrode active materials, are arranged with a separator sandwiched therebetween, and a battery case that seals and houses the electrode assembly together with an electrolyte.

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

[0007] Secondary batteries used in small devices typically have two or three battery cells, while secondary batteries used in medium- to large-sized devices such as automobiles typically use a battery module in which multiple battery cells are electrically connected. Such battery modules improve capacity and output by connecting multiple battery cells in series or parallel to each other to form a battery cell stack. Furthermore, one or more battery modules can be attached to various control and protection systems, such as a battery disconnect unit (BDU), battery management system (BMS), and cooling system, to form a battery pack.

[0008] In a battery pack consisting of multiple battery modules, heat from the multiple battery cells can accumulate in a small space, causing a rapid temperature rise. In other words, a battery module in which multiple battery cells are stacked and a battery pack equipped with such a battery module can produce high output, but if the heat from the battery cells is not properly dissipated or if thermal runaway occurs in the battery cells, there is a high possibility of repeated fires and subsequent explosions.

[0009] Meanwhile, bus bars connected to the battery modules are provided inside the battery pack.

[0010] FIG. 1 is an exploded perspective view and a combined perspective view of a conventional busbar assembly.

[0011] 1, a conventional busbar assembly 10 includes a busbar 20, a coating 20C surrounding the busbar 20, a cap CP, and a tape AL for fixing the cap CP. The busbar 20 may be in the form of a metal rod or a laminate of metal sheets. The busbar 20 includes a conductive material, such as copper (Cu).

[0012] The covering 20C can cover the busbar 20. The covering 20C can include an electrically insulating material, such as silicone or epoxy. Because the covering 20C covers the busbar 20, through which a high current flows, it prevents the busbar 20 from coming into contact with other electrical components or conductive members other than the terminal busbar of the battery module, thereby preventing a short circuit. The covering 20C is shaped like a tube, and the busbar 20 can be inserted inside the covering 20C.

[0013] Caps CP are provided at both ends of the busbar 20 for insulation. The caps CP may be, for example, rubber caps. The caps CP may be attached to the covering 20C using tape AL.

[0014] Meanwhile, the busbar 20 may be flexible or rigid. A busbar assembly 10 including a flexible busbar 20 can be bent using a jig or the like. However, there is a limit to how much the busbar assembly 10 can be bent, particularly, there is a limit to how many times the busbar assembly 10 can be bent. In the case of a busbar assembly 10 including a rigid busbar 20, it is difficult to provide a coating 20C that can be bent multiple times without deteriorating fire resistance.

[0015] Therefore, there is a demand for technological development for implementing busbar assemblies including busbars having complex shapes, such as shapes that are bent multiple times. Summary of the Invention [Problem to be solved by the invention]

[0016] An object of the present invention is to provide a bus bar assembly that can exhibit excellent fire resistance and electrical insulation properties for a bus bar that includes a bent portion, and a battery pack including the bus bar assembly.

[0017] However, the problems to be solved by the embodiments of the present invention are not limited to the above-mentioned problems, and can be expanded to various problems within the scope of the technical ideas included in the present invention. [Means for solving the problem]

[0018] The bus bar assembly of the present invention includes a body portion including a bent portion, a bus bar extending from both ends of the body portion and including end portions each having a through hole formed therein, an insulating layer insert-injection molded to encase the body portion, and a cap encasing the end portions.

[0019] In one embodiment, the insulating layer may include a first portion that encases the body portion and a second portion that extends from the first portion and is inserted into the cap.

[0020] In one embodiment, the second portion may have a thickness smaller than the thickness of the first portion, and the second portion may form a step with the first portion.

[0021] In one embodiment, the cap may include a body portion that encloses a portion of the end portion where the through hole is formed, and an extension portion that encloses the second portion of the insulating layer.

[0022] In one embodiment, the cap may have a tubular shape into which the end may be inserted.

[0023] In one embodiment, the insulating layer may include a fire-resistant plastic.

[0024] In one embodiment, the cap may comprise refractory silicone.

[0025] In one embodiment, the insulating layer may further include a glass fiber layer disposed on the insulating layer and the cap so as to enclose the boundaries of the insulating layer and the cap.

[0026] In one embodiment, the body portion may include at least one bend.

[0027] In one embodiment, the bend may include a vertically bent portion.

[0028] The battery pack of the present invention includes at least one busbar assembly according to the above, battery modules, a BDU (battery disconnect unit) module for controlling the electrical connection of the battery modules, and a BMS (Battery Management System) module for monitoring and controlling the operation of the battery modules, wherein the at least one busbar assembly electrically connects at least one of the battery modules, the battery modules and the BDU module, the battery modules and the BMS module, and the BDU module and the BMS module. [Effects of the Invention]

[0029] The bus bar assembly of the present invention includes a bus bar including a bent portion, and can exhibit excellent fire resistance and insulation properties.

[0030] The effects of the present invention are not limited to the effects described above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims. [Brief explanation of the drawings]

[0031] [Figure 1] 1A and 1B are exploded and assembled perspective views of a conventional bus bar assembly; [Figure 2] FIG. 2 is a plan view of the battery pack according to the embodiment. [Figure 3] 3 is a perspective view of one of the battery modules included in the battery pack of FIG. 2. FIG. [Figure 4] 4 is a partial perspective view showing the battery module of FIG. 3 with a module frame and end plates removed. FIG. [Figure 5] FIG. 2 is a perspective view of a bus bar according to an embodiment. [Figure 6] FIG. 1 is a perspective view of a bus bar provided with an insulating layer according to an embodiment. [Figure 7] FIG. 2 is a partial side view of a busbar provided with an insulating layer according to one embodiment. [Figure 8] FIG. 2 is a partial side view of a busbar provided with an insulating layer and cap according to one embodiment. [Figure 9] FIG. 2 is a partial side view of the busbar assembly of one embodiment. [Figure 10] FIG. 2 is a perspective view of a busbar assembly according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0032] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings, in which: FIG. 1 is a block diagram of a semiconductor device according to an embodiment of the present invention;

[0033] In order to clearly describe the present invention, parts not necessary for the description will be omitted and the same reference numerals will be used throughout the specification to refer to the same or similar components.

[0034] Furthermore, the size and thickness of each component 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 of some layers and regions are exaggerated to clearly show them. In the drawings, the thicknesses of some layers and regions are exaggerated for the convenience of explanation.

[0035] Furthermore, when a layer, film, region, plate, or other part is said to be "on" or "above" another part, this does not only mean that it is "directly above" that part, but also includes cases where there are other parts between them. Conversely, when a part is said to be "directly above" another part, it means that there are no other parts between them. Furthermore, being "on" or "above" a reference part means being located above or below the reference part, and does not necessarily mean being located "above" or "above" the direction opposite to gravity.

[0036] Furthermore, throughout the specification, when a part is said to "comprise" a certain element, this does not mean that it may further include other elements, unless otherwise specified.

[0037] Also, throughout the specification, "on a plane" means a view of the subject part from above, and "on a cross section" means a view of the subject part cut vertically from the side.

[0038] Furthermore, throughout this specification, the first direction DR1, the second direction DR2, and the third direction DR3 are used as relative concepts. The first direction DR1, the second direction DR2, and the third direction DR3 may intersect perpendicularly with each other. Throughout this specification, the concepts of up and down are described as being defined along the third direction DR3. Specifically, the up direction or upper direction refers to the third direction DR3. The down direction or lower direction refers to the direction opposite to the third direction DR3. In this specification, "thickness" refers to the length measured in the third direction DR3.

[0039] In this embodiment, terms indicating directions such as front, back, left, right, up, and down are used, but these terms are used for convenience of explanation and may change depending on the position of the target object, the position of the observer, etc.

[0040] FIG. 2 is a plan view of the battery pack of one embodiment.

[0041] 2 , a battery pack 1000 according to one embodiment includes a busbar assembly 100, a pack frame 1100, battery modules 1200, a battery disconnect unit (BDU) module 1300 for controlling electrical connection of the battery modules 1200, and a battery management system (BMS) module 1400 for monitoring and controlling operation of the battery modules 1200. At least one busbar assembly 100 according to this embodiment electrically connects at least one of the battery modules 1200 together, the battery modules 1200 and the BDU module 1300 together, the battery modules 1200 and the BMS module 1400 together, and the BDU module 1300 and the BMS module 1400 together. Specifically, a plurality of battery modules 1200 may be housed in the pack frame 1100, and the busbar assembly 100 may provide electrical connection between the battery modules 1200 and between the battery modules 1200 and the BDU module 1300. That is, the busbar assembly 100 according to this embodiment can serve as an HV (High Voltage) connection. Here, the HV connection is a connection that serves as a power source for supplying power that requires high voltage, and refers to a connection between battery cells or a connection between battery modules.

[0042] Meanwhile, the BDU module 1300 is a component 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 in which the current exceeds a set range, the BDU module 1300 cuts off the power supply to the battery pack 1000, thereby ensuring the safety of the battery pack 1000.

[0043] Meanwhile, the LV connection member 100′ according to this embodiment may be responsible for electrical connection between the battery module 1200 and the BMS module 1400. The electrical connection here is a low voltage (LV) connection, which refers to a sensing connection for detecting and controlling the voltage and temperature of the battery module 1200. Specifically, sensors and the like are disposed in the battery module 1200, and real-time temperature and voltage information of the battery module 1200 is transmitted to the BMS module 1400 via the LV connection member 100′. The real-time operating status of the battery module 1200 can be monitored and controlled via the BMS module 1400. Although not specifically illustrated, an HV current sensor may be incorporated into the BMS module 1400. In this case, the busbar assembly according to this embodiment may be responsible for electrical connection between the battery module 1200 and the BMS module 1400 or between the BDU module 1300 and the BMS module 1400.

[0044] A battery module 1200 according to this embodiment will be described with reference to Figures 3 and 4. However, the battery module 1200 described below is an example of the 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 also be applied.

[0045] FIG. 3 is a perspective view showing one of the battery modules included in the battery pack of FIG.

[0046] FIG. 4 is a partial perspective view showing the battery module of FIG. 3 with the module frame and end plates removed.

[0047] 3 and 4, a 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. 4. Such a battery cell stack 11A can be housed in a module frame 30 and end plates 40.

[0048] 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 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 in 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. However, the battery cell 11 of the present invention is not limited to a pouch-type battery cell.

[0049] 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. 3. Both the lead bus bar 21 and the terminal bus bar 22 may include a metal material with excellent conductivity.

[0050] The busbar assembly 100 according to this embodiment may be electrically connected to such a terminal busbar 22 to achieve the above-described HV connection. That is, the battery module 1200 may 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.

[0051] Hereinafter, a busbar assembly according to one embodiment will be described with reference to FIGS.

[0052] FIG. 5 is a perspective view of a bus bar according to an embodiment.

[0053] Referring to FIG. 5, one embodiment of a busbar 200 includes a body portion 210 and an end portion 220 .

[0054] The end portions 220 extend from both ends of the body portion 210. Through-holes HH may be formed at both ends 220 of the busbar 20 to connect to terminal busbars 22 (see FIG. 3) of the battery module 1200 (see FIG. 2). Fasteners may be inserted into the through-holes HH to connect the busbar 200 to an external electrical device. For example, bolts may be inserted into the through-holes HH of the end portions 220 to connect the busbar 200 to terminal busbars 22 (see FIG. 3) of the battery module 1200 (see FIG. 3). The busbar 20 may serve as a high voltage (HV) connection in the battery pack 1000 (see FIG. 2). The HV connection refers to a connection that functions as a power source for supplying power. The busbar 20 guides electrical connections in the battery module 1200 (see FIG. 2) and is generally made of a metal material with excellent conductivity. For example, the busbar 200 may include copper (Cu).

[0055] The body portion 210 may correspond to the center of the busbar 200. The body portion 210 includes a bent portion BD. The bent portion BD refers to a portion of the body portion 210 that is bent. The bent portion BD may be bent at various angles, for example, vertically. The body portion 210 may include one or more bent portions BD. FIG. 5 illustrates the body portion 210 as including a plurality of bent portions BD, for example. When a plurality of bent portions BD are provided, the bending directions and bending angles of the bent portions BD may be different from each other, may be the same as each other, or at least one may be different from the others.

[0056] The body portion 210 includes a bending portion BD and can be bent into various shapes, thereby effectively connecting the battery module 1200 (see FIG. 2) to be connected, and improving the utilization of the internal space of the battery pack 1000 (see FIG. 2).

[0057] Meanwhile, for convenience of explanation, the bus bar 200 has been described herein as including the body portion 210 and the end portion 220, but the body portion 210 and the end portion 220 have an integral shape.

[0058] FIG. 6 is a perspective view of a busbar provided with an insulating layer according to one embodiment.

[0059] 5 and 6, an insulating layer 300 may be provided to cover the bus bar 200. The insulating layer 300 may be insert injection molded to encase the body portion 210. As a result, the insulating layer 300 may be molded to fit the shape of the body portion 210, including the bent portion BD.

[0060] The insulating layer 300 may include a fire-resistant plastic and have excellent fire resistance. When exposed to a fire, the fire-resistant plastic can block the fire for a certain period of time without developing holes or drips. Furthermore, the fire-resistant plastic can protect the internal structure by forming a carbonized layer in the fire. The fire-resistant plastic may include at least one of a PPO (Polyphenylene Oxide)-based material, a PA (Polyamide)-based material, and a PBT (Polybutylene Terephthalate)-based material. Therefore, the insulating layer 300 insulates the body 210 of the bus bar 200 even under fire or high temperatures, preventing the bus bar 200 from coming into contact with other electrical components or conductive members and causing a short circuit.

[0061] Furthermore, insulating layer 300 may include a fire-resistant plastic, which may be more advantageous for insert injection molding of bus bar 200 including bent portion BD. Specifically, fire-resistant plastic has better flowability than fire-resistant silicone, and therefore, the shape of bus bar 200 including bent portion BD can be more easily molded.

[0062] The insulating layer 300 is provided to encase the body portion 210. That is, the insulating layer 300 is provided to insulate the body portion 210 (see FIG. 5). To improve insulation, the insulating layer 300 may further encase at least a portion of the end portion 220. In this regard, reference is made to FIG. 7.

[0063] FIG. 7 is a partial side view of a busbar provided with an insulating layer according to one embodiment.

[0064] FIG. 7 is an enlarged side view of a portion of the body portion 210 (see FIG. 6) and one end portion 220 of the bus bar 200. As shown in FIG.

[0065] 6 and 7, the insulating layer 300 may include a first portion 310 that covers the body portion 210 of the bus bar 200 and a second portion 320 that encases a portion of the end portion 220. The second portion 320 extends from the first portion 310. Specifically, the second portion 320 extends from the first portion 310 to an extent that does not cover the through-hole HH of the end portion 220, and may be covered by a cap 400 (see FIG. 8) described below.

[0066] The first portion 310 has a first thickness T1, and the second portion 320 can have a second thickness T1 that is smaller than the first thickness T1. The second portion 320 forms a step with the first portion 310, which allows a cap 400 (see FIG. 8 ), which will be described later, to fit around the second portion 320.

[0067] The insulating layer 300 includes a second portion 320, which can prevent the bus bar 200 from being exposed at the point where the cap 400 (see FIG. 8) is connected, and can ensure a sufficient insulating distance.

[0068] FIG. 8 is a partial side view of a busbar provided with an insulating layer and cap according to one embodiment.

[0069] FIG. 8 is an enlarged side view of a portion of body portion 210 (see FIG. 6) and one end portion 220 of busbar 200. As shown in FIG.

[0070] 8, a cap 400 may be provided on the end portion 220. The cap 400 is provided to cover the end portion 220, and more specifically, to cover the end portion 220 and the second portion 320. In one embodiment, the cap 400 may have a tube shape into which the end portion 220 and the second portion 320 can be inserted. Alternatively, in one embodiment, the cap 400 may have a shape with at least a portion of the bottom open. In other words, the cap 400 is not limited to a single shape as long as it can cover the side and top surfaces of the end portion 220 and the second portion 320.

[0071] An embodiment in which the cap 400 has a tube shape will be described below as an example. Specifically, the cap 400 may include a main body portion 410 and an extension portion 420 extending from the main body portion 410. The main body portion 410 may cover a portion of the end portion 220 in which the through hole HH is formed. That is, the main body portion 410 may be a portion that covers the end of the end portion 220. The extension portion 420 may be a portion that extends from the main body portion 410 and covers the second portion 320 of the insulating layer 300. The main body portion 410 may be thicker than the extension portion 420 so as to be able to accommodate a fastening member inserted into the through hole HH.

[0072] In one embodiment, the cap 400 includes refractory silicone and has excellent fire resistance. Unlike typical silicone materials that burn when exposed to flames or at high heat, refractory silicone can be ceramified at high heat. Therefore, when exposed to flames, refractory silicone ceramifies without burning, thereby maintaining insulation for the bus bar 200. For example, refractory silicone can be ceramified at temperatures between 500°C and 1700°C. However, the temperature range at which refractory silicone ceramifies is not limited thereto.

[0073] Refractory silicone can include silicone polymer and silica. For example, the silicone polymer can be a polysiloxane-based compound with a vinyl group as a functional group, which can function as the base material for the refractory silicone material. For example, the silica can be fumed silica, which acts as a reinforcing filler in the silicone polymer. High-purity silicon chloride (SiCl4) can be produced from silicon metal as the main raw material through a reaction with hydrochloric acid and a purification process. Fumed silica can then be obtained by reacting this with hydrogen and oxygen in a high-temperature flame. Refractory silicone can also include platinum (Pt) as a catalyst.

[0074] When refractory silicone is exposed to flame or high heat, the silicone polymer decomposes and silica (SiO2) cross-links form, forming a ceramic material. In one embodiment, cap 400 containing refractory silicone ceramifies and maintains its electrical insulation properties, rather than burning or melting away when exposed to flame or in a high-heat environment. Therefore, cap 400 insulates end 220 of bus bar 200, even in the presence of flame or high temperatures, preventing bus bar 200 from coming into contact with other electrical components or conductive members and causing a short circuit.

[0075] Meanwhile, the busbar 200 can have the entire body 210 and end 220 insulated with a fire-resistant material by applying the insulating layer 300 and the cap 400. In addition, the busbar 200 covered with the second portion 320 of the insulating layer 300 is again insulated by the cap 400, ensuring the insulation distance ID1.

[0076] Meanwhile, although not shown in Fig. 8, an external fastening member may be inserted into the through-hole HH (see Fig. 5) of the end portion 220 before the cap 400 is provided, thereby electrically connecting the end portion 220 to the terminal bus bar 22 (see Fig. 3). For convenience of explanation, Fig. 8 and the following drawings only show and describe the structures of the bus bar 200, the insulating layer 300, and the cap 400.

[0077] FIG. 9 is a partial side view of a busbar assembly according to one embodiment.

[0078] FIG. 9 is an enlarged partial side view of one end of the busbar assembly 100. As shown in FIG.

[0079] 9 , the busbar assembly 100 of one embodiment may further include a glass fiber layer 500. The glass fiber layer 500 is provided to cover the boundary between the insulating layer 300 and the cap 400. Specifically, the glass fiber layer 500 may be provided to include the boundary between the insulating layer 300 and the cap 400, and further cover a portion of the insulating layer 300 and a portion of the cap 400.

[0080] The insulation distance ID2 can be further ensured by wrapping the boundary between the insulating layer 300 and the cap 400 again with the glass fiber layer 500.

[0081] The glass fiber layer 500 also provides abrasion resistance to the bus bar assembly 100 and can function as a primary protective film that physically protects the internal structure. For example, the glass fiber layer 500 can prevent the boundary between the insulating layer 300 and the cap 400 from being directly exposed to an external flame.

[0082] The glass fiber layer 500 can also provide structural rigidity to the busbar assembly 100 and improve its insulating performance. For example, if the cap 400 is ceramized in a fire or high-heat environment, the cap 400 may maintain its electrical insulation properties but may lose strength and be destroyed by external forces. By providing structural rigidity, the glass fiber layer 500 can prevent the cap 400 from cracking due to external forces.

[0083] In one embodiment, the fiberglass layer 500 is provided in the form of a fiberglass tape and can be wound multiple times.

[0084] Meanwhile, although one end of the bus bar 200 has been illustrated and explained in an enlarged manner in FIGS. 7, 8, and 9, the same explanation can be applied to the other end of the bus bar 200.

[0085] FIG. 10 is a perspective view of a bus bar assembly according to an embodiment.

[0086] 5 and 10, a busbar assembly 100 according to one embodiment can include a busbar 200 including a bent portion BD, an insulating layer 300 that is insert injection molded to cover the body portion 210 of the busbar 200, a cap 400 that encases the end portion 220 of the busbar 200, and a glass fiber layer 500. Accordingly, the busbar assembly 100 including the busbar 200 including the bent portion BD can have excellent fire resistance and insulation properties.

[0087] One or more battery modules according to the above-described embodiment may 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.

[0088] The battery module or battery pack can be applied to various devices, specifically, transportation means such as electric bicycles, electric cars, and hybrids, and energy storage systems (ESS), but is not limited thereto, and can be applied to various devices that can use secondary batteries.

[0089] Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the claims below also fall within the scope of the present invention. [Explanation of symbols]

[0090] 100 Busbar assembly 200 Busbar 210 Body 220 End 300 insulating layer 310 Part 1 320 Part 2 400 caps 410 Main body 420 Extension 500 fiberglass layers 1000 battery packs 1100 pack frame 1200 battery module 1300 BDU Module 1400 BMS Module

Claims

1. a bus bar including a body portion including a bent portion and end portions extending from both ends of the body portion and having through holes formed therein; an insulating layer insert injection molded to encase the body portion; and A busbar assembly including a cap enclosing the end portion.

2. The busbar assembly of claim 1 , wherein the insulating layer includes a first portion that encases the body portion and a second portion that extends from the first portion and is inserted into the cap.

3. the thickness of the second portion is less than the thickness of the first portion; The busbar assembly of claim 2 , wherein the second portion forms a step with the first portion.

4. The cap is a main body portion that encloses a portion of the end portion in which the through hole is formed; and The busbar assembly of claim 2 including an extension that encases the second portion of the insulating layer.

5. The busbar assembly of claim 1 , wherein the cap has a tubular shape into which the end portion can be inserted.

6. The busbar assembly of claim 1 , wherein the insulating layer comprises a fire-resistant plastic.

7. The busbar assembly of claim 1 , wherein the cap comprises refractory silicone.

8. The busbar assembly of claim 1 , further comprising a fiberglass layer disposed on the insulating layer and the cap so as to enclose a boundary of the insulating layer and the cap.

9. The busbar assembly according to claim 1 , wherein the body portion includes at least one bent portion.

10. The busbar assembly of claim 1 , wherein the bend includes a vertically bent portion.

11. At least one busbar assembly according to any one of claims 1 to 10, Battery modules, a battery disconnect unit (BDU) module for controlling the electrical connection of the battery module; and a BMS (Battery Management System) module that monitors and controls the operation of the battery module; The at least one busbar assembly electrically connects at least one of the battery modules, the battery modules and the BDU module, the battery modules and the BMS module, and the BDU module and the BMS module.

Images