WO2024263012A1 - 버스바 조립체 및 이를 포함하는 전지 팩 - Google Patents
버스바 조립체 및 이를 포함하는 전지 팩 Download PDFInfo
- Publication number
- WO2024263012A1 WO2024263012A1 PCT/KR2024/095285 KR2024095285W WO2024263012A1 WO 2024263012 A1 WO2024263012 A1 WO 2024263012A1 KR 2024095285 W KR2024095285 W KR 2024095285W WO 2024263012 A1 WO2024263012 A1 WO 2024263012A1
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- WO
- WIPO (PCT)
- Prior art keywords
- cap
- busbar
- busbar assembly
- insulating layer
- battery
- 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.)
- Ceased
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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
- H01M50/50—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
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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
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
-
- 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
-
- 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
- H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
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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
- H01M50/521—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
-
- 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
- H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
-
- 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
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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
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
-
- 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
-
- 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 combined 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 occurs in the battery cells, there is a high possibility that continuous ignition or subsequent explosion will occur.
- 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 an 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 that can maintain electrical insulation without melting even when a flame occurs inside a battery pack, and a battery pack including the same.
- the busbar assembly of the present invention comprises: a busbar including a body portion and an end portion extending from both ends of the body portion and having a through hole defined therein; an insulating layer surrounding the body portion and having a groove having a sunken shape formed therein; and a cap inserted into the groove and surrounding the end portion, wherein the insulating layer has greater elasticity than the cap.
- the insulating layer may include a first portion that surrounds the body portion and a second portion that extends from the first portion and surrounds a portion of the end portion and is covered by the cap.
- the above grooves may be provided in two numbers on the upper surface of the first portion and formed adjacent to the second portion.
- the cap may include a fastening portion at least partially protruding toward the body portion and inserted into the groove.
- the groove is formed along a periphery of the second portion, and the groove can be adjacent to the first portion.
- the cap may be inserted into the groove, at least partially, while covering the second portion.
- the above first part can surround the outer circumference of the bus bar.
- the above second portion can surround the upper surface and side surface of the bus bar.
- the above cap can cover at least a portion of the lower surface of the bus bar.
- the above insulating layer may include silicon that is ceramicized at high temperatures.
- the cap may comprise a refractory plastic.
- 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 can improve insulation and fire resistance by allowing the busbar covering and cap to maintain their shapes 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 perspective view of a bus bar of one embodiment.
- Figure 6 is a plan view of a busbar provided with an insulating layer according to one embodiment.
- Figure 7 is a plan view of a busbar assembly of one embodiment.
- Figure 8 is a side view of a busbar assembly of one embodiment.
- Figure 9 is a cross-sectional view of a busbar assembly of one embodiment.
- Figure 10 is a cross-sectional view of a busbar assembly of one embodiment.
- Figure 11 is a cross-sectional view of a busbar assembly of one embodiment.
- Figure 12 is a cross-sectional view of a busbar assembly of one embodiment.
- Figure 13 is a plan view of a busbar assembly of one embodiment.
- Figure 14 is a plan view of a busbar assembly of one embodiment.
- Figure 15 is a plan view of a busbar assembly of one embodiment.
- Figure 16 is a side view of a busbar assembly of one embodiment.
- Figure 17 is a rear 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 concepts of upper and lower are described as being distinguished along the third direction (DR3).
- the upper direction or the upper direction means the third direction (DR3).
- the lower direction or the 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 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 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.
- the 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 periphery of the pouch case.
- the battery cell (11) may be formed in a rectangular sheet structure.
- An 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 portion 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 will be described with reference to FIGS. 5 to 12.
- Figure 5 is a perspective view of a bus bar of one embodiment.
- the busbar (200) guides electrical connection within the battery pack (1000, see FIG. 2).
- the busbar (200) is configured to guide electrical connection, i.e., HV connection, of the battery module (1200, see FIG. 2), and may include a metal material having excellent electrical conductivity.
- the busbar (200) may include a copper (Cu) material.
- the body portion (210) may have a rod shape extending in one direction. In FIG. 2, as an example, the busbar (200) is illustrated as having a rod shape extending in a first direction (DR1).
- the busbar (200) of one embodiment includes a body portion (210) and an end portion (220).
- the body portion (210) may correspond to the center of the busbar (200).
- the end portion (220) extends from both ends of the body portion (210).
- the end portion (220) may extend in a first direction (DR1) and an opposite direction to the first direction (DR1) from both ends of the body portion (210).
- DR1 first direction
- DR1 first direction
- a through hole (HH) is defined in the end portion (220).
- a fastening member is inserted into the through hole (HH) to connect the bus bar (200) to an external electrical device.
- a bolt can be inserted into the through hole (HH) of the end portion (220) to connect the bus bar (200) and the terminal bus bar (22, see FIG. 3) of the battery module (1200, see FIG. 3).
- Figure 6 is a perspective view of a busbar provided with an insulating layer according to one embodiment.
- the insulating layer (300) is provided to surround the body portion (210, see FIG. 5) of the bus bar (200). That is, the insulating layer (300) is provided to insulate the body portion (210, see FIG. 5). At this time, at least a portion of the end portion (220) is exposed from the 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 insulating layer (300) may include refractory silicone.
- the insulating layer (300) may be formed by molding refractory silicone on the outer surface of the body portion (210, FIG. 5) of the bus bar (200).
- refractory silicone can be ceramified at high temperatures. Therefore, the refractory silicone may be ceramified without burning when exposed to flame, thereby maintaining insulation properties for the bus bar (200).
- the refractory silicone 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 silicone is ceramized is not limited thereto.
- the refractory silicone may include a silicone polymer and silica.
- the applied silicone polymer may be a polysiloxane series compound having a vinyl group as a functional group, and may serve as a base material of the refractory silicone material.
- the applied silica may be fumed silica as a reinforcing filler included in the silicone polymer.
- a high-purity silicon chloride (SiCl 4 ) compound may be manufactured by reacting metal silicon as a main raw material with hydrochloric acid and a purification process. Fumed silica may be obtained by reacting this with hydrogen and oxygen in a high-temperature flame.
- the refractory silicone may include platinum (Pt) as a catalyst.
- An insulating layer (300) of one embodiment including refractory silicon can maintain electrical insulation properties by being ceramicized rather than burning or melting away even when exposed to flame or placed in a high-temperature environment.
- the insulating layer (300) can insulate the body part (210, see FIG. 5) of the busbar (200) even in flames or at high temperatures, thereby preventing the busbar (200) from coming into contact with other electrical components or conductive members and causing a short circuit.
- a cap (400, see FIG. 7) described later is connected to the insulating layer (300).
- the insulating layer (300) may be extended to cover a portion of the end portion (220). At this time, both ends of the insulating layer (300) are extended to a predetermined length within a range that does not cover the through hole (HH) of the end portion (220).
- the insulating layer (300) may include a first portion (310) that wraps around the body portion (210, see FIG. 5) of the bus bar (200) and a second portion (320) that wraps around a portion of the end portion (200).
- the first part (310) can surround the outer surface of the body part (210) of the bus bar (200).
- the second part (320) is a part that extends from both ends of the first part (310) and is covered by a cap (400) described later.
- the second part (320) can surround the upper surface and side surface of the end part (220) of the bus bar (200). That is, the second part (320) may not be arranged on the lower surface of the end part (220). This is because the cap (400) described later is fitted to the end part (220) on a plane and wraps around the upper surface and side surface of the end part (220).
- the second part (320) extends in opposite directions from both ends of the first part (310). Specifically, the second part (320) is provided to extend in the first direction (DR1) from one end of the first part (310) and in the opposite direction of the first direction (DR1) from the other end of the first part (310). The second part (320) extends from the first part (310) to an extent that it does not cover the through hole (HH) of the end (220).
- the insulating layer (300) can secure an insulating distance by including the second part (320).
- the cap (400, see FIG. 7) described below can surround the second part (320) to prevent the bus bar (200) from being exposed to the outside.
- a groove (GV) having a sunken shape is formed in the insulating layer (300).
- the groove (GV) may be formed on the upper surface of the first portion (310) and provided adjacent to the second portion (320).
- the grooves (GV) may be provided in two pieces, and may be provided at each end of the first portion (310). Since the groove (GV) has a sunken shape, an external fastening part may be inserted into the groove (GV).
- a cap (400, see FIG. 7) described below may include a fastening part inserted into the groove (GV).
- Figure 7 is a plan view of a busbar assembly of one embodiment.
- a cap (400) is provided at one end (220, see FIG. 6) of a bus bar (200), and the other end (220) is illustrated as not having a cap (400).
- the bus bar assembly (100) of the present invention includes caps (400) provided at both ends (220) of the bus bar (200), as illustrated in FIG. 13.
- a busbar assembly (100) of one embodiment includes a busbar (200), an insulating layer (300), and a cap (400).
- the insulating layer (300) insulates a body portion (210) of the busbar (200), and the cap (400) insulates an end portion (220) of the busbar (200).
- the insulating layer (300) and the cap (400) are connected to each other, and specifically, the cap (400) is joined to the insulating layer (300) while surrounding a second portion (320) of the insulating layer (300). Accordingly, the busbar (200) can be prevented from being exposed between the cap (400) and the insulating layer (300), and an insulating distance can be secured.
- the cap (400) can be stably fixed to the insulating layer (300) without shaking left and right.
- the cap (400) may include a refractory plastic. Accordingly, the cap (400) may be harder and less elastic than the insulating layer (300) including refractory silicon.
- the cap (400) can be fixed to the insulating layer (300) without a separate cap fixing tape.
- the cap (400) is tightly fitted into the groove (GV) of the insulating layer (300)
- the relatively elastic insulating layer (300) is compressed, thereby inserting the cap (400) into the groove (GV), and the cap (400) can be fixed into the groove (GV) by the elasticity of the insulating layer (300).
- the conventional tape (AL, see FIG. 1) for fixing the cap (400) to the insulating layer (300) can be omitted.
- the cap (400) may exhibit excellent fire resistance by including a refractory plastic.
- the refractory plastic may block the flame without causing a hole or drip for a certain period of time when exposed to flame.
- the refractory plastic may protect the internal structure by forming a carbonized layer in the flame.
- 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.
- the busbar assembly (100) of one embodiment can have a simpler structure than conventional ones while improving insulation and fire resistance.
- Figure 8 is a side view of a busbar assembly of one embodiment.
- the cap (400) of one embodiment may include a body (410) and a fastening portion (420) extended from the body (410).
- the fastening portion (420) extends from the end (220) of the bus bar (200) toward the body portion (210) and is inserted into a groove (GV) formed in the insulating layer (300).
- the groove (GV) is formed within a protrusion (330) extending upward from the upper surface of the first portion (310) of the insulating layer (300), thereby ensuring a sufficient depth.
- the depth of the groove (GV) may not be sufficiently ensured by the body portion (210) arranged inside the insulating layer (300).
- the fastening portion (420) of the cap (400) when the fastening portion (420) of the cap (400) is tightly fitted into the groove (GV), the fastening portion (420) can be inserted into and fixed in the groove (GV) due to the strong elasticity of the groove (GV). Accordingly, the cap (400) can be stably connected to the insulating layer (300) without shaking left and right.
- the cap (400) may include a fixing member (430) extending downward from the main body (410).
- the fixing member (430) may cover at least a portion of the lower surface of the bus bar (200).
- the fixing member (430) may cover at least a portion of the lower surface of the end (220) of the bus bar (200).
- the cap (400) may be stably fixed to the bus bar (200) without shaking up and down, including the fixing member (430).
- the insulating layer (300) may be provided by injection molding the first part (310), the second part (320), and the protrusion (330) into an integral shape.
- FIGS. 9 to 12 are cross-sectional views of a busbar assembly of one embodiment.
- Figure 9 is a cross-sectional view corresponding to the cutting line A-A’ shown in Figure 7.
- the main body (410) of the cap (400) surrounds and insulates the upper surface and side surface of the end portion (220) of the bus bar (200).
- a space (SP) exists between the main body (410) and the end portion (220).
- the space (SP) is for accommodating an external fastening member (e.g., a bolt) inserted into a through hole (HH, see FIG. 7).
- a fixed portion (430) extending downward from the main body (410) covers the lower surface of the end portion (220) of the bus bar (200).
- the fixed portion (430) may be formed at one end and the other end of the end portion (220) in the first direction (DR1).
- the cap (400) can be fixed to the bus bar (200) without shaking up and down by the fixed portion (430).
- Figure 10 is a cross-sectional view corresponding to the cutting line B-B’ shown in Figure 7.
- a fixing member (430) is not arranged at the lower portion of the end portion (220) corresponding to the cutting line B-B’. That is, only the main body (410) surrounds and insulates the upper surface and side surface of the end portion (220). At this time, a space (SP) exists between the main body (410) and the end portion (220). Although not illustrated, the space (SP) is for accommodating an external fastening member (e.g., a bolt) inserted into a through hole (HH, see FIG. 7).
- an external fastening member e.g., a bolt
- Figure 11 is a cross-sectional view corresponding to the cutting line C-C’ shown in Figure 7.
- a second part (320) of an insulating layer (300) is placed on an end (220) of a bus bar (200), and a main body (410) of a cap (400) is placed on the second part (320).
- the second part (320) surrounds and insulates the side and upper surface of the end portion (220).
- the main body (410) can surround the second part (320) without a separate space.
- the insulating layer (300) can secure an insulating distance by including the second part (320) overlapping the end portion (220).
- Figure 12 is a cross-sectional view corresponding to the cutting line D-D’ shown in Figure 7.
- the first part (310) of the insulating layer (300) can surround the outer surface of the body part (210) of the bus bar (200).
- the first part (310) can insulate all of the upper surface, side surface, and lower surface of the body part (210).
- a protrusion (330) having a groove (GV) formed therein is positioned on the first part (310).
- the fastening part (420) of the cap (400) can be fastened to the groove (GV).
- Figure 13 is a plan view of a busbar assembly of one embodiment.
- the busbar assembly (100) includes a busbar (200), an insulating layer (300), and a cap (400).
- the cap (400) may include two caps (400a, 400b) provided at both ends of the busbar assembly (100).
- the two caps (400a, 400b) may have a shape that is symmetrical with respect to the center of the busbar assembly (100).
- the fastening portion (420) of the cap (400) is fitted into the groove (GV) of the relatively elastic insulating layer (300) so as to be stably fixed to the insulating layer (300) without shaking left and right.
- the fixing portion (430) of the cap (400) is arranged on the lower surface of the end (220) of the busbar (200) so as to be stably fixed to the busbar (200) without shaking up and down.
- Figure 14 is a plan view of a busbar assembly of one embodiment.
- the busbar assembly (100) includes a busbar (200), an insulating layer (300), and a cap (400), and may further include a glass fiber layer (500).
- the glass fiber layer (500) may be provided to surround the insulating layer (300, see FIG. 13).
- the glass fiber layer (500) may physically protect an internal structure.
- the glass fiber layer (500) may prevent the insulating layer (300, see FIG. 13) from being directly exposed to an external flame.
- the glass fiber layer (500) may provide structural rigidity to the busbar assembly (100) to improve insulation performance.
- the electrical insulation of the insulation layer (300, see FIG. 13) may be maintained, but the strength of the insulation layer (300, see FIG. 13) may be weakened and the insulation layer may be broken by an external force.
- the glass fiber layer (500) may be provided to wrap the insulation layer (300, see FIG. 13) to prevent the insulation layer (300, see FIG. 13) from being broken by an external force.
- the glass fiber layer (500) may be provided in the form of a glass fiber tape and formed by winding it multiple times on the insulating layer (300, see FIG. 13).
- busbar assembly (100) of the present invention is not limited to the above-described content.
- Figure 15 is a plan view of a busbar assembly of one embodiment.
- a busbar assembly (100-a) of one embodiment may include a busbar (200), an insulating layer (300-a), and a cap (400-a).
- the cap (400-a) is provided only at one end (220) of the busbar (200), and the other end (220) is exposed without the cap (400-a).
- the cap (400-a) may be provided at each of the two ends (220).
- An insulating layer (300-a) may be provided on the outer surface of the bus bar (200).
- the insulating layer (300-a) may include a first portion (310) that wraps around the body portion (210, see FIG. 5) of the bus bar (200) and a second portion (320-a) that wraps around a portion of the end portion (200).
- the insulating layer (300-a) may be provided by injection molding so that the first portion (310) and the second portion (320-a) have an integral shape.
- a groove (GV-a) having a sunken shape is formed in the insulating layer (300-a).
- the groove (GV-a) is formed along the periphery of the second portion (320-a) and may be formed adjacent to the first portion (310).
- the cap (400-a) When the cap (400-a) is provided at the end (220), it may cover the second portion (320-a) and at least a portion thereof may be inserted into the groove (GV-a) of the second portion (320-a). Accordingly, the cap (400-a) may be prevented from being peeled off in the direction of the end (220).
- the grooves (GV-a) may be provided in two and formed in each of the two second portions (320-a).
- Figure 16 is a side view of a busbar assembly of one embodiment.
- the first part (310) may surround the outer surface of the body part (210) of the bus bar (200).
- the second part (320-a) is a part that extends from both ends of the first part (310) and is covered by the cap (400-a).
- the second part (320-a) may surround the upper surface and the side surface of the end part (220) of the bus bar (200). That is, the second part (320-a) may not be arranged on the lower surface of the end part (220). This is because the cap (400-a) wraps around the upper surface and the side surface of the end part (220) while being fitted to the end part (220) on a plane.
- the cap (400-a) of one embodiment may include a main body (410) and a fixing portion (430) extending from the lower main body (410).
- the cap (400-a) of one embodiment does not include a fastening portion (420). This is because the cap (400-a) can be stably connected to the insulating layer (300-a) even without the fastening portion (420) described above, as the cap (400-a) is inserted into the groove (GV-a) formed along the periphery of the second portion (320-a).
- the fixed part (430) can extend downward from the main body (410) and cover at least a portion of the lower surface of the end (220) of the bus bar (200).
- the cap (400-a) can be stably fixed to the bus bar (200) without shaking up and down, including the fixed part (430).
- Figure 17 is a rear view of a busbar assembly of one embodiment.
- the fixing portion (430) of the cap (400-a) may be provided along at least a portion of the perimeter of the end portion (220). Even if the cap (400-a) does not include the fastening portion (420, see FIG. 7), sufficient fixing force can be secured because the fixing portion (430) is arranged along the perimeter of the bus bar (200).
- the busbar assembly of the present invention can connect a cap to an insulating layer by the elasticity of the insulating layer by inserting a relatively rigid cap into a relatively elastic insulating layer. Accordingly, a tape conventionally used to secure the cap can be omitted, and a busbar assembly having a simpler structure and improved insulation and fire resistance can be provided.
- One or more battery modules according to the above-described embodiment can be mounted together with various control and protection systems such as a BMS (Battery Management System), a BDU (Battery Disconnect Unit), and a cooling system to form a battery pack.
- 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)
- Insulated Conductors (AREA)
Abstract
Description
Claims (13)
- 바디부 및 상기 바디부의 양 단에서 연장되고 관통홀이 정의된 단부를 포함하는 버스바;상기 바디부를 둘러싸고, 함몰된 형상의 그루브가 형성된 절연층; 및상기 그루브에 삽입되고, 상기 단부를 감싸는 캡을 포함하고,상기 절연층은 상기 캡에 비해 탄성이 강한 버스바 조립체.
- 제1항에서,상기 절연층은 상기 바디부를 감싸는 제1 부분 및 상기 제1 부분에서 연장되어 상기 단부의 일부를 감싸고, 상기 캡에 의해 커버되는 제2 부분을 포함하는 버스바 조립체.
- 제2항에서,상기 그루브는 상기 제1 부분의 상면에 2개 제공되고, 상기 제2 부분에 인접하게 형성된 버스바 조립체.
- 제3항에서,상기 캡은 적어도 일부가 상기 바디부 방향으로 돌출되어 상기 그루브에 삽입되는 체결부를 포함하는 버스바 조립체.
- 제2항에서,상기 그루브는 상기 제2 부분의 둘레를 따라 형성되고,상기 그루브는 상기 제1 부분에 인접한 버스바 조립체.
- 제5항에서,상기 캡은 상기 제2 부분을 덮으면서, 적어도 일부가 상기 그루브에 삽입되는 버스바 조립체.
- 제1항에서,상기 제1 부분은 상기 버스바의 외주면을 둘러싸는 버스바 조립체.
- 제1항에서,상기 제2 부분은 상기 버스바의 상면 및 측면을 둘러싸는 버스바 조립체.
- 제1항에서,상기 캡은 상기 버스바의 하면의 적어도 일부를 덮는 버스바 조립체.
- 제1항에서,상기 절연층을 감싸는 유리 섬유층을 더 포함하는 버스바 조립체.
- 제1항에서,상기 절연층은 고온에서 세라믹화되는 실리콘을 포함하는 버스바 조립체.
- 제1항에서,상기 캡은 내화 플라스틱을 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 |
|---|---|---|---|
| JP2025528345A JP2025539770A (ja) | 2023-06-21 | 2024-02-16 | バスバー組立体およびこれを含む電池パック |
| CN202480004837.5A CN120202588A (zh) | 2023-06-21 | 2024-02-16 | 汇流条组件及包括该汇流条组件的电池组 |
| EP24826327.9A EP4597733A4 (en) | 2023-06-21 | 2024-02-16 | OMNIBUS BAR AND BATTERY PACK INCLUDING |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020230079552A KR20240177975A (ko) | 2023-06-21 | 2023-06-21 | 버스바 조립체 및 이를 포함하는 전지 팩 |
| KR10-2023-0079552 | 2023-06-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024263012A1 true WO2024263012A1 (ko) | 2024-12-26 |
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ID=93929876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2024/095285 Ceased WO2024263012A1 (ko) | 2023-06-21 | 2024-02-16 | 버스바 조립체 및 이를 포함하는 전지 팩 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20240429579A1 (ko) |
| EP (1) | EP4597733A4 (ko) |
| JP (1) | JP2025539770A (ko) |
| KR (1) | KR20240177975A (ko) |
| CN (1) | CN120202588A (ko) |
| WO (1) | WO2024263012A1 (ko) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20250024338A (ko) * | 2023-08-11 | 2025-02-18 | 주식회사 엘지에너지솔루션 | 버스바 조립체 및 이를 포함하는 전지 팩 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20170085665A (ko) * | 2016-01-15 | 2017-07-25 | 주식회사 엘지화학 | 2층으로 장착된 전지모듈들을 포함하는 전지팩 |
| KR20180010576A (ko) * | 2016-07-21 | 2018-01-31 | 삼성에스디아이 주식회사 | 배터리 모듈 |
| KR20210077146A (ko) * | 2019-12-17 | 2021-06-25 | 주식회사 유라코퍼레이션 | 버스바 및 러버캡 고정구조 |
| KR20210088170A (ko) * | 2020-01-06 | 2021-07-14 | 주식회사 엘지에너지솔루션 | 안전성이 향상된 배터리 팩 및 이를 포함하는 이차전지 |
| CN218274013U (zh) * | 2022-06-28 | 2023-01-10 | 广东合晟新能源科技有限公司 | 防火挤塑折弯母排 |
| KR20230079552A (ko) | 2021-11-29 | 2023-06-07 | 주식회사 자이언트케미칼 | 알루미늄실리케이트 제조방법 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11250950A (ja) * | 1998-02-27 | 1999-09-17 | Harness Syst Tech Res Ltd | バッテリーの接続構造 |
| JP5813430B2 (ja) * | 2011-09-13 | 2015-11-17 | 矢崎総業株式会社 | 電源体の接続部材、バスバーモジュール及び該バスバーモジュールを備えた電源装置 |
-
2023
- 2023-06-21 KR KR1020230079552A patent/KR20240177975A/ko active Pending
-
2024
- 2024-02-16 EP EP24826327.9A patent/EP4597733A4/en active Pending
- 2024-02-16 WO PCT/KR2024/095285 patent/WO2024263012A1/ko not_active Ceased
- 2024-02-16 CN CN202480004837.5A patent/CN120202588A/zh active Pending
- 2024-02-16 JP JP2025528345A patent/JP2025539770A/ja active Pending
- 2024-03-14 US US18/605,212 patent/US20240429579A1/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20170085665A (ko) * | 2016-01-15 | 2017-07-25 | 주식회사 엘지화학 | 2층으로 장착된 전지모듈들을 포함하는 전지팩 |
| KR20180010576A (ko) * | 2016-07-21 | 2018-01-31 | 삼성에스디아이 주식회사 | 배터리 모듈 |
| KR20210077146A (ko) * | 2019-12-17 | 2021-06-25 | 주식회사 유라코퍼레이션 | 버스바 및 러버캡 고정구조 |
| KR20210088170A (ko) * | 2020-01-06 | 2021-07-14 | 주식회사 엘지에너지솔루션 | 안전성이 향상된 배터리 팩 및 이를 포함하는 이차전지 |
| KR20230079552A (ko) | 2021-11-29 | 2023-06-07 | 주식회사 자이언트케미칼 | 알루미늄실리케이트 제조방법 |
| CN218274013U (zh) * | 2022-06-28 | 2023-01-10 | 广东合晟新能源科技有限公司 | 防火挤塑折弯母排 |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN120202588A (zh) | 2025-06-24 |
| US20240429579A1 (en) | 2024-12-26 |
| EP4597733A4 (en) | 2026-04-29 |
| EP4597733A1 (en) | 2025-08-06 |
| JP2025539770A (ja) | 2025-12-09 |
| KR20240177975A (ko) | 2024-12-30 |
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