WO2025037751A1 - 버스바 조립체 및 이를 포함하는 전지 팩 - Google Patents
버스바 조립체 및 이를 포함하는 전지 팩 Download PDFInfo
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- WO2025037751A1 WO2025037751A1 PCT/KR2024/009341 KR2024009341W WO2025037751A1 WO 2025037751 A1 WO2025037751 A1 WO 2025037751A1 KR 2024009341 W KR2024009341 W KR 2024009341W WO 2025037751 A1 WO2025037751 A1 WO 2025037751A1
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- WIPO (PCT)
- Prior art keywords
- insulating layer
- busbar assembly
- battery
- busbar
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/519—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising printed circuit boards [PCB]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
- H01M50/526—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material having a layered structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a busbar assembly and a battery pack including the same, and more specifically, to a busbar assembly having improved insulation stability and a battery pack including the same.
- rechargeable secondary batteries are being used as a power source for electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (P-HEVs) as a solution to air pollution caused by existing gasoline vehicles that use fossil fuels, and thus the need for the development of secondary batteries is increasing.
- EVs electric vehicles
- HEVs hybrid electric vehicles
- P-HEVs plug-in hybrid electric vehicles
- lithium secondary batteries are receiving attention due to their advantages such as the fact that they have almost no memory effect compared to nickel-based secondary batteries, are free to charge and discharge, have a very low self-discharge rate, and have high energy density.
- the lithium secondary battery mainly use lithium oxide and carbon material as positive electrode active materials and negative electrode active materials, respectively.
- the lithium secondary battery comprises an electrode assembly in which positive and negative electrode plates, each of which is coated with the positive and negative electrode active materials, are arranged with a separator between them, and a battery case that seals and stores the electrode assembly together with an electrolyte.
- lithium secondary batteries can be classified into can-type secondary batteries in which the electrode assembly is built into a metal can and pouch-type secondary batteries in which the electrode assembly is built into a pouch of an aluminum laminate sheet, depending on the shape of the outer packaging material.
- a battery module in which a plurality of battery cells are electrically connected is used.
- a plurality of battery cells are connected to each other in series or in parallel to form a battery cell stack, thereby improving capacity and output.
- 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.
- BDU Battery Disconnect Unit
- BMS Battery Management System
- a battery pack composed of multiple battery modules can rapidly and severely increase in temperature due to the heat generated from multiple battery cells being added together in a narrow space.
- battery modules composed of multiple battery cells and battery packs equipped with such battery modules can obtain high output, but if the heat dissipation of the battery cells is not properly performed or if a thermal runaway phenomenon of the battery cells occurs, there is a high possibility of continuous ignition or subsequent explosion.
- a bus bar is provided that connects to the battery module.
- Figure 1 is an exploded perspective view and a combined perspective view of a conventional busbar assembly.
- a conventional busbar assembly (10) includes a busbar (20), a covering (20C) covering the busbar (20), a cap (CP), and a tape (AL) for fixing the cap (CP).
- the busbar (20) is a metal member in the shape of a bar extending along the longitudinal direction.
- a through hole (HH) for connection with a terminal busbar of a battery module may be formed at both ends of the busbar (20).
- This busbar (20) is a component that is in charge of an HV (High voltage) connection in a battery pack.
- the HV connection means a connection that serves as a power source for supplying electric power
- the busbar (20) is a component that guides the electrical connection of the battery module, and generally includes a metal material having excellent electrical conductivity.
- the busbar (20) may include a copper (Cu) material.
- the covering (20C) can wrap around the bus bar (20).
- the covering (20C) can include an electrically insulating material, for example, a material such as silicone or epoxy. Since the covering (20C) wraps around the bus bar (20) through which a high current flows, the bus bar (20) is prevented from coming into contact with other electrical components or conductive members other than the terminal bus bar of the battery module, thereby preventing a short circuit from occurring.
- a fastening member is inserted into the through hole (HH) of the bus bar (20) so that the bus bar (20) can be connected to the terminal bus bar of the battery module.
- a cap (CP) is attached to both ends of the bus bar (20) for insulation.
- the cap (CP) may be, for example, a rubber cap.
- the cap (CP) may be attached to the covering (20C) using a tape (AL).
- the temperature of the flame is very high at about 1000°C, so the covering (20C) covering the bus bar (20) may melt, or the cap (CP) and tape (AL) may melt, exposing the bus bar (20). If the exposed bus bar (20) comes into contact with another conductive member and a short circuit occurs, the internal flame may spread further and may spread to the outside of the battery pack. Ultimately, this may lead to an explosion of the battery pack or a vehicle equipped with the battery pack.
- the problem to be solved by the present invention is to provide a busbar assembly capable of maintaining excellent electrical insulation even when a flame occurs inside the battery pack, and a battery pack including the same.
- the busbar assembly of the present invention comprises: a busbar connected to a battery module inside a battery pack to guide an electrical connection of the battery module; a first insulating layer surrounding an outer circumferential surface of the busbar and having grooves formed at both ends; a second insulating layer surrounding the first insulating layer; and a cap including a main body surrounding both ends of the busbar and a fixing part inserted into the grooves.
- the thickness of the fixing portion is greater than the thickness of the first insulating layer, the lower portion of the fixing portion is joined to the first insulating layer, and the upper portion of the fixing portion can be in contact with a second insulating layer.
- the second insulating layer may be disposed between the fixing members disposed at both ends of the bus bar.
- the thickness of the fixing portion is the same as the thickness of the first insulating layer, the fixing portion and the first insulating layer are located in the same layer, and the second insulating layer can be disposed on the fixing portion and the first insulating layer.
- a tape may be placed between the second insulating layer and the fixing member.
- the second insulating layer may have a tubular shape comprising glass fibers.
- the outer surface of the second insulating layer may be coated with silicone.
- the second insulating layer may not include an adhesive material.
- the fixture may include a plurality of spaced protrusions, and the groove may include a plurality of spaced recesses into which the protrusions may be inserted.
- the fixture comprises a shape of an extended block, and the groove may have a groove into which the block is inserted.
- the first insulating layer may comprise refractory silicone.
- the battery pack of the present invention comprises: at least one busbar assembly; battery modules; a BDU (battery disconnect unit) module for controlling electrical connection of the battery modules; and a BMS (battery management system) module for monitoring and controlling operation of the battery modules, wherein the at least one busbar 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, and between the BDU module and the BMS module.
- the busbar assembly of the present invention minimizes the use of adhesive for bonding the cap and the insulating layer, thereby maintaining excellent insulation and fire resistance even when exposed to flame.
- Figure 1 is an exploded perspective view and a combined perspective view of a conventional busbar assembly.
- Figure 2 is a plan view of a battery pack of one embodiment.
- FIG. 3 is a perspective view of one of the battery modules included in the battery pack of FIG. 2.
- FIG 4 is a partial perspective view showing the battery module of Figure 3 with the module frame and end plate removed.
- Figure 5 is a plan view of a busbar provided with an insulating layer according to one embodiment.
- Figure 6 is a plan view of a cap of one embodiment.
- Figure 7 is a plan view of a busbar provided with a cap and an insulating layer according to one embodiment.
- Figure 8 is a plan view of a cap of one embodiment.
- Figure 9 is a plan view of a busbar provided with a cap and an insulating layer according to one embodiment.
- FIG. 10 is a plan view showing one step of a method for manufacturing a busbar assembly of one embodiment.
- FIG. 11 is a plan view showing one step of a method for manufacturing a busbar assembly of one embodiment.
- FIG. 12 is a plan view showing one step of a method for manufacturing a busbar assembly of one embodiment.
- FIG. 13 is a plan view showing one step of a method for manufacturing a busbar assembly of one embodiment.
- Figure 14 is a cross-sectional view of a busbar assembly of one embodiment.
- Figure 15 is a cross-sectional view of a busbar assembly of one embodiment.
- Figure 16 is a cross-sectional view of a busbar assembly of one embodiment.
- a part such as a layer, film, region, or plate is said to be “over” or “on” another part, this includes not only cases where it is “directly over” the other part, but also cases where there is another part in between.
- a part is said to be “directly over” another part, it means that there is no other part in between.
- it is said to be “over” or “on” a reference part, it means that it is located above or below the reference part, and does not necessarily mean that it is located “over” or “on” in the opposite direction of gravity.
- 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 be perpendicular to each other.
- the concept of up and down is described as being distinguished along the third direction (DR3).
- the upward or upper direction means the third direction (DR3).
- the downward or lower direction means the opposite direction to the third direction (DR3).
- Thiickness” in the specification means the length measured in the third direction (DR3).
- Figure 2 is a plan view of a battery pack of one embodiment.
- a battery pack (1000) includes a busbar assembly (100), a pack frame (1100), battery modules (1200), a BDU (battery disconnect unit) module (1300) for controlling electrical connection of the battery modules (1200), and a BMS (battery management system) module (1400) for monitoring and controlling operation of the battery modules (1200).
- At least one busbar assembly (100) according to the present embodiment electrically connects at least one of the battery modules (1200), between the battery modules (1200) and the BDU module (1300), between the battery modules (1200) and the BMS module (1400), and between the BDU module (1300) and the BMS module (1400).
- a plurality of battery modules (1200) can be accommodated in a pack frame (1100), and electrical connections between the battery modules (1200) or electrical connections between the battery modules (1200) and the BDU module (1300) can be made by the busbar assembly (100). That is, the busbar assembly (100) according to the present embodiment can be in charge of HV (High voltage) connections.
- the HV connection is a connection that serves as a power source for supplying power that requires high voltage, and means a connection between battery cells or a connection between battery modules.
- the BDU module (1300) is a member for controlling the electrical connection of the battery module (1200) and can cut off power between the power conversion device and the battery module (1200).
- the BDU module (1300) can cut off power to the battery pack (1000) when a condition occurs in which the current exceeds a set range, thereby ensuring the safety of the battery pack (1000).
- the LV connecting member (100') 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 detecting and controlling the voltage and temperature of the battery module (1200).
- sensors, etc. inside the battery module (1200) are arranged, and real-time temperature information or voltage information of the battery module (1200) is transmitted to the BMS module (1400) through the LV connecting member (100').
- the real-time operating status of the battery module (1200) can be monitored and controlled through the BMS module (1400).
- an HV current sensor is integrated into the BMS module (1400).
- the busbar assembly according to the present embodiment can 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).
- 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.
- FIG. 3 is a perspective view showing one of the battery modules included in the battery pack of FIG. 2.
- FIG 4 is a partial perspective view showing the battery module of Figure 3 with the module frame and end plate removed.
- the battery module (1200) may include a battery cell stack (11A) in which a plurality of battery cells (11) are stacked.
- the battery cell stack (11A) is illustrated in FIG. 4. This battery cell stack (11A) may be accommodated in a module frame (30) and an end plate (40).
- the battery cell (11) may be a pouch-type battery cell.
- a pouch-type battery cell may be formed by housing an electrode assembly in a pouch case of a laminate sheet including a resin layer and a metal layer, and then fusing the outer peripheral portion of the pouch case.
- the battery cell (11) of the present invention is not limited to a pouch-type battery cell.
- the battery cell (11) may be formed in a rectangular sheet structure.
- the electrode lead (11L) connected to the electrode assembly protrudes to the outside of the pouch case, and the electrode leads (11L) of each battery cell (11) may be electrically connected to each other via a lead bus bar (21). Meanwhile, at least one electrode lead (11L) may be connected to a terminal bus bar (22). A part of the terminal bus bar (22) may be exposed to the outside of the battery module (1200) as illustrated in FIG. 3.
- Both the lead bus bar (21) and the terminal bus bar (22) may include a metal material having excellent electrical conductivity.
- the busbar assembly (100) is electrically connected to the terminal busbar (22), so that the HV connection described above can be made. That is, the battery module (1200) can be electrically connected to another battery module (1200), a BDU module (1300), or a BMS module (1400) via the busbar assembly (100) connected to the terminal busbar (22).
- busbar assembly according to one embodiment is described.
- Figure 5 is a plan view of a busbar provided with an insulating layer according to one embodiment.
- a bus bar (200) guides an electrical connection within a battery pack (1000, see FIG. 2).
- the bus bar (200) is configured to guide an electrical connection, i.e., an HV connection, of a battery module (1200, see FIG. 2), and may include a metal material having excellent electrical conductivity.
- the bus bar (200) may include a copper (Cu) material.
- the bus bar (200) may have a rod shape extending in one direction.
- a through hole (HH) is defined at both ends of the bus bar (200).
- a fastening member may be inserted into the through hole (HH) to connect the bus bar (200) and a terminal bus bar (22, see FIG. 3) of the battery module (1200, see FIG. 3).
- the first insulating layer (300) is provided to surround the bus bar (200). At this time, the through hole (HH) of the bus bar (200) is exposed from the first insulating layer (300) and can be electrically connected to the terminal bus bar (22, see FIG. 3) of the battery module (1200, see FIG. 3).
- the first insulating layer (300) may include a refractory material.
- the first insulating layer (300) may include refractory silicon.
- the first insulating layer (300) may be formed by molding refractory silicon on the outer surface of the bus bar (200).
- refractory silicon can be ceramified at high temperatures. Therefore, the refractory silicon may be ceramified without burning when exposed to flame, thereby maintaining insulation properties for the bus bar (200).
- the refractory silicon may be ceramized at a temperature of 500 degrees Celsius or higher and 1,700 degrees Celsius or lower.
- the temperature range at which the refractory silicon is ceramized is not limited thereto.
- the refractory silicon may include a silicone polymer and silica.
- the applied silicone polymer can be a polysiloxane series compound having a vinyl group as a functional group, and can serve as a base material of a refractory silicone material.
- the applied silica can be fumed silica as a reinforcing filler included in the silicone polymer.
- a high-purity silicon chloride (SiCl 4 ) compound can be manufactured through a reaction with hydrochloric acid and a purification process using metal silicon as a main raw material. Fumed silica can be obtained by reacting this with hydrogen and oxygen in a high-temperature flame.
- the refractory silicone can include platinum (Pt) as a catalyst.
- the first insulating layer (300) of one embodiment including refractory silicone can maintain electrical insulation properties by being ceramized rather than burning or melting even when exposed to flame or a high-temperature environment. Accordingly, the first insulating layer (300) can insulate the busbar (200) without burning even in flame or high temperature, thereby preventing the busbar (200) from contacting other electrical components or conductive members and causing a short circuit.
- a groove (GV) is formed at both ends of the first insulating layer (300).
- the groove (GV) has a shape that is sunken inward at both ends of the first insulating layer (300).
- the groove (GV) may include a plurality of sunken portions spaced apart from each other.
- the groove (GV) is a structure for coupling with a cap (400) described below.
- Figure 6 is a plan view of a cap of one embodiment.
- Figure 7 is a plan view of a busbar provided with a cap and an insulating layer according to one embodiment.
- the cap (400) covers both ends of the busbar (200), and in particular, covers the through hole (HH).
- the cap (400) covers both ends of the busbar (200) and the fastening member. Therefore, the cap (400) has a space for storing the fastening member.
- the process of connecting the busbar (200) to the terminal busbar (22, see FIG. 3) by the fastening member is omitted.
- the cap (400) is coupled to the first insulating layer (300) to prevent the busbar (200) from being exposed to the outside and prevent short circuiting of the busbar (200).
- the cap (400) may include a refractory material.
- the cap (400) may include any one of refractory plastic, mica, and refractory silicone. Accordingly, the cap (400) may exhibit excellent refractory properties.
- the refractory plastic can block flames without forming holes or drips for a certain period of time when exposed to flames. Specifically, the refractory plastic can protect internal structures by forming a carbonized layer in the flames.
- the refractory 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.
- Mica has excellent fire resistance, heat resistance, high temperature resistance and electrical insulation properties, so it can act as a fire-resistant insulating layer without burning in flames or high temperatures.
- the same content as described above for the first insulating layer (300) can be applied.
- the cap (400) of the present invention includes a main body (410) and a fixing member (420).
- the main body (410) covers both ends of the bus bar (200) as described above, and has a space for storing a fastening member.
- the fixing member (420) is inserted into the groove (GV) of the first insulating layer (300) so that the cap (400) is connected to the first insulating layer (300).
- the fixing member (420) may have a shape for being inserted into the groove (GV), and the fixing member (420) of one embodiment may include a plurality of protrusions spaced apart from each other.
- the fixing member (420) may be provided integrally with the main body (410), but the embodiment is not limited thereto. When the fixing member (420) including a plurality of protrusions is coupled to the groove (GV) including a plurality of recessed portions, the bonding force between the cap (400) and the first insulating layer (300) may be strengthened.
- Figure 8 is a plan view of a cap of one embodiment.
- Figure 9 is a plan view of a busbar provided with a cap and an insulating layer according to one embodiment.
- the cap (400-1) includes a main body (410) and a fixing member (420-1), and the fixing member (420-1) of one embodiment may include one protrusion extending in one direction.
- the first insulating layer (300-1) of one embodiment may include one recessed member extending in one direction to match the shape of the fixing member (420-1). Since the fixing member (420-1) has a shape extending in one direction, the bonding area between the tape provided on the cap (400-1) and the cap (400-1) can be increased and the bonding strength can be enhanced.
- busbar assembly (100) having the structure of the first insulating layer (300) and the cap (400) illustrated in FIGS. 6 and 7 will be described as an example. However, the contents described below can be equally applied to a busbar assembly having the structure of the first insulating layer (300-1) and the cap (400-1) illustrated in FIGS. 8 and 9.
- FIG. 10 is a plan view showing one step of a method for manufacturing a busbar assembly of one embodiment.
- FIG. 11 is a plan view showing one step of a method for manufacturing a busbar assembly of one embodiment.
- FIG. 12 is a plan view showing one step of a method for manufacturing a busbar assembly of one embodiment.
- FIG. 13 is a plan view showing one step of a method for manufacturing a busbar assembly of one embodiment.
- FIGS. 10 to 13 an example of a method for manufacturing a busbar assembly is described.
- a method for manufacturing a busbar assembly of one embodiment includes a step of providing a second insulating layer (500) on a first insulating layer (300).
- the second insulating layer (500) is provided to surround the first insulating layer (300).
- the second insulating layer (500) may be provided to surround the first insulating layer (300).
- the second insulating layer (500) may be provided in a tube shape.
- the second insulating layer (500) provided in a tube shape may surround the first insulating layer (300) and be fitted in the longitudinal direction (Ld) of the busbar (200).
- the second insulating layer (500) of the present invention may not include a separate adhesive material.
- the adhesive material may include, for example, at least one of an epoxy resin, a silicone resin, and an acrylic resin. Since the second insulating layer (500) does not include an adhesive material, it is possible to prevent the insulation of the busbar assembly from being deteriorated by generating harmful gases from the adhesive material when a flame occurs.
- a step of providing a cap (400) on the other end of the first insulating layer (300) is performed.
- a fixing member (420) is inserted into a groove (GV) formed on the other end of the first insulating layer (300)
- the cap (400) is fixed to the other end of the first insulating layer (300).
- the second insulating layer (500) is spread so as to contact the fixing parts (420) of both ends.
- the second insulating layer (500) can be fixed by being sandwiched between the fixing parts (420) of the cap (400) at both ends. A detailed description thereof will be described later with reference to FIGS. 15 and 16.
- a tape (600) may be provided on a fixing portion (420) to form a busbar assembly (100) of one embodiment.
- the tape (600) may be provided to cover the fixing portion (420) and a portion of the second insulating layer (500).
- the tape (600) may strengthen the bonding force between the cap (400) and the second insulating layer (500) and improve the insulation of the busbar assembly (100).
- the tape (600) may include, for example, a glass fiber layer.
- the glass fiber layer may physically protect the internal structure, and for example, the glass fiber layer may prevent the first insulating layer (300) from being directly exposed to an external flame.
- the busbar assembly (100) of one embodiment includes a tape (600) including a glass fiber layer, thereby improving structural rigidity and maintaining excellent insulation performance even in the event of a flame. Meanwhile, the tape (600) includes an adhesive layer in addition to the glass fiber layer in order to have adhesiveness.
- the tape (600) is used in a small amount, and the second insulating layer (500) that conventionally uses a glass fiber tape is replaced with a glass fiber tube that does not include an adhesive material, thereby minimizing the generation of harmful gases due to ignition of the adhesive material when the busbar assembly (100) is exposed to a flame.
- Figure 14 is a cross-sectional view of a busbar assembly of one embodiment.
- Fig. 14 is a cross-sectional view of an example of a busbar assembly (100) cut along line A-A’ illustrated in Fig. 13.
- a first insulating layer (300) surrounds an outer surface of a busbar (200), and a second insulating layer (500) surrounds an outer surface of the first insulating layer (300).
- the second insulating layer (500) may include a glass fiber layer (510) and a coating layer (520).
- the glass fiber layer (510) may be the aforementioned glass fiber layer, and may be provided in a tube shape without including a separate adhesive layer.
- the coating layer (520) may be formed by coating silicone on the outer surface of the glass fiber layer (510). The second insulating layer (500) may further improve fire resistance by including the coating layer (520).
- Figure 15 is a cross-sectional view of a busbar assembly of one embodiment.
- FIG. 15 is a cross-sectional view of one embodiment of the busbar assembly (100) shown in FIG. 13 cut along the line B-B’.
- the thickness (H1) of the fixing portion (420) of the cap (400) may be greater than the thickness (T1) of the first insulating layer (300). Accordingly, when the fixing portion (420) is coupled to the first insulating layer (300), the first insulating layer (300) may contact the lower portion (PT1) of the fixing portion (420), and the remaining portion, the upper portion (PT2) of the fixing portion (420), may be exposed from the first insulating layer (300).
- the upper portion (PT2) of the fixing portion (420) may function as a catch for fixing the second insulating layer (500). Specifically, the second insulating layer (500) is fixed by being sandwiched between the upper portions (PT2) of the fixing portions (420).
- the second insulating layer (500) is fitted so as to contact the upper portion (PT2) of the fixing portion (420) provided at one end.
- the second insulating layer (500) is fitted and fixed between the upper portions (PT2) of the fixing portions (420) provided at both ends. Accordingly, even if the second insulating layer (500) does not include a separate adhesive material, the second insulating layer (500) can be stably fixed without moving in the longitudinal direction of the busbar (200) by the fixing portion (420) included in the cap (400).
- the tape (600) can improve the structural rigidity within the busbar assembly (100) by once again bonding the fixing portion (420) and the second insulating layer (500).
- the tape (600) may be omitted as needed.
- the embodiment of the cap (400) is not limited thereto.
- Figure 16 is a cross-sectional view of a busbar assembly of one embodiment.
- FIG. 16 is a cross-sectional view of one embodiment of the busbar assembly (100) cut along the line B-B’ illustrated in FIG. 13.
- the thickness (H2) of the fixing portion (420-2) may be the same as the thickness (T1) of the first insulating layer (300). Accordingly, when the fixing portion (420-2) is coupled to the first insulating layer (300), the first insulating layer (300) and the fixing portion (420-2) may be arranged on the same layer.
- a tape (600) may be provided to tape the cap (400-2) and the first insulating layer (300).
- a second insulating layer (500) may be provided to wrap the fixing portion (420-2), the tape (600), and the first insulating layer (300).
- the second insulating layer (500) having a tube shape can be fitted to surround the outer surface of the tape (600) and the first insulating layer (300). Accordingly, the tape (600) is placed between the second insulating layer (600) and the fixing member (420).
- the second insulating layer (500) is placed and fixed between the main bodies (410) of the caps (400-2) provided at both ends. Meanwhile, the tape (600) may be omitted as needed.
- the busbar assembly of the present invention comprises a first insulating layer including a cap including a fixing portion and a groove into which the fixing portion can be inserted, thereby minimizing the amount of adhesive used to join the cap and the first insulating layer and preventing deterioration of insulation due to generation of harmful gases from the adhesive when a flame occurs.
- the second insulating layer disposed on the first insulating layer is provided in a tube shape that does not include an adhesive material, and the second insulating layer can be fixed by caps at both ends without an adhesive material. Accordingly, the busbar assembly of the present invention can maintain excellent insulation and fire resistance even when exposed to flame.
- 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.
- BMS Battery Management System
- BDU Battery Disconnect Unit
- cooling system to form a battery pack.
- the above battery module or battery pack can be applied to various devices. Specifically, it can be applied to means of transportation such as electric bicycles, electric cars, hybrids, or ESS (Energy Storage Systems), but is not limited thereto and can be applied to various devices that can use secondary batteries.
- means of transportation such as electric bicycles, electric cars, hybrids, or ESS (Energy Storage Systems)
- ESS Electronicgy Storage Systems
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
Claims (12)
- 전지 팩 내부에서 전지 모듈과 연결되어 전지 모듈의 전기적 연결을 안내하는 버스바;상기 버스바의 외주면을 감싸고, 양단에 홈이 형성된 제1 절연층;상기 제1 절연층을 감싸는 제2 절연층; 및상기 버스바의 양단을 감싸는 본체와 상기 홈에 삽입되는 고정부를 포함하는 캡;을 포함하는 버스바 조립체.
- 제1항에서,상기 고정부의 두께는 상기 제1 절연층의 두께보다 크고,상기 고정부의 하부는 상기 제1 절연층과 결합하고,상기 고정부의 상부에는 제2 절연층이 접하는 버스바 조립체.
- 제2항에서,상기 제2 절연층은 상기 버스바의 양단에 배치된 상기 고정부들 사이에 배치되는 버스바 조립체.
- 제1항에서,상기 고정부의 두께는 상기 제1 절연층의 두께와 동일하고,상기 고정부와 상기 제1 절연층은 동일한 층에 위치하고,상기 제2 절연층은 상기 고정부 및 상기 제1 절연층 상에 배치된 버스바 조립체.
- 제4항에서,상기 제2 절연층 및 상기 고정부 사이에 테이프가 배치된 버스바 조립체.
- 제1항에서,상기 제2 절연층은 유리 섬유를 포함하는 튜브 형상을 갖는 버스바 조립체.
- 제6항에서,상기 제2 절연층의 외면에는 실리콘이 코팅된 버스바 조립체.
- 제1항에서,상기 제2 절연층은 접착 물질을 포함하지 않는 버스바 조립체.
- 제1항에서,상기 고정부는 서로 이격된 복수의 돌출부들을 포함하고,상기 홈은 상기 돌출부들이 삽입될 수 있는 복수의 이격된 함몰부들을 포함하는 버스바 조립체.
- 제1항에서,상기 고정부는 연장된 블록의 형상을 포함하고,상기 홈은 상기 블록이 삽입되는 홈을 갖는 버스바 조립체.
- 제1항에서,상기 제1 절연층은 내화 실리콘을 포함하는 버스바 조립체.
- 제1항에 따른 적어도 하나의 버스바 조립체;전지 모듈들;상기 전지 모듈들의 전기적 연결을 제어하기 위한 BDU(battery disconnect unit) 모듈; 및상기 전지 모듈의 작동을 모니터링 및 제어하는 BMS(Battery Management System) 모듈을 포함하고,상기 적어도 하나의 버스바 조립체는, 상기 전지 모듈들 사이, 상기 전지 모듈과 상기 BDU 모듈 사이, 상기 전지 모듈과 상기 BMS 모듈 사이 및 상기 BDU 모듈과 상기 BMS 모듈 사이 중 적어도 하나를 전기적으로 연결하는 전지 팩.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2025530435A JP2025538624A (ja) | 2023-08-11 | 2024-07-03 | バスバーアセンブリおよびこれを含む電池パック |
| EP24854304.3A EP4604303A4 (en) | 2023-08-11 | 2024-07-03 | OMNIBUS BAR AND BATTERY PACK INCLUDING |
| CN202480004788.5A CN120188327A (zh) | 2023-08-11 | 2024-07-03 | 汇流条组件和包括该汇流条组件的电池组 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2023-0105717 | 2023-08-11 | ||
| KR1020230105717A KR20250024338A (ko) | 2023-08-11 | 2023-08-11 | 버스바 조립체 및 이를 포함하는 전지 팩 |
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| Publication Number | Publication Date |
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| WO2025037751A1 true WO2025037751A1 (ko) | 2025-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2024/009341 Pending WO2025037751A1 (ko) | 2023-08-11 | 2024-07-03 | 버스바 조립체 및 이를 포함하는 전지 팩 |
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| Country | Link |
|---|---|
| EP (1) | EP4604303A4 (ko) |
| JP (1) | JP2025538624A (ko) |
| KR (1) | KR20250024338A (ko) |
| CN (1) | CN120188327A (ko) |
| WO (1) | WO2025037751A1 (ko) |
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| JP6618504B2 (ja) * | 2017-04-28 | 2019-12-11 | 矢崎総業株式会社 | バスバー及びバスバーの製造方法 |
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| KR102270734B1 (ko) * | 2019-12-17 | 2021-06-29 | 주식회사 유라코퍼레이션 | 버스바 및 러버캡 고정구조 |
| CN215770643U (zh) * | 2021-06-23 | 2022-02-08 | 深圳市沃尔热缩有限公司 | 母排连接件 |
| KR20240177975A (ko) * | 2023-06-21 | 2024-12-30 | 주식회사 엘지에너지솔루션 | 버스바 조립체 및 이를 포함하는 전지 팩 |
-
2023
- 2023-08-11 KR KR1020230105717A patent/KR20250024338A/ko active Pending
-
2024
- 2024-07-03 JP JP2025530435A patent/JP2025538624A/ja active Pending
- 2024-07-03 CN CN202480004788.5A patent/CN120188327A/zh active Pending
- 2024-07-03 WO PCT/KR2024/009341 patent/WO2025037751A1/ko active Pending
- 2024-07-03 EP EP24854304.3A patent/EP4604303A4/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| EP4604303A1 (en) | 2025-08-20 |
| JP2025538624A (ja) | 2025-11-28 |
| CN120188327A (zh) | 2025-06-20 |
| KR20250024338A (ko) | 2025-02-18 |
| EP4604303A4 (en) | 2026-03-25 |
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