WO2024251868A1 - Bloc-batterie rechargeable - Google Patents

Bloc-batterie rechargeable Download PDF

Info

Publication number
WO2024251868A1
WO2024251868A1 PCT/EP2024/065579 EP2024065579W WO2024251868A1 WO 2024251868 A1 WO2024251868 A1 WO 2024251868A1 EP 2024065579 W EP2024065579 W EP 2024065579W WO 2024251868 A1 WO2024251868 A1 WO 2024251868A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuse
battery pack
cell
parallel
fuse element
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
Application number
PCT/EP2024/065579
Other languages
German (de)
English (en)
Inventor
Peter Pochert
Tamas ZELENA
Johannes FLOHE
Lisa Bayer
Bernd FREUDENMANN
Tobias Thiel
Tamas TARI
Enno Lorenz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2024251868A1 publication Critical patent/WO2024251868A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • 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
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • 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
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • 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
    • H01M50/522—Inorganic 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/581—Devices or arrangements for the interruption of current in response to temperature
    • 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
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive devices
    • H01M2200/103—Fuse
    • 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
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • 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 invention relates to a battery pack, in particular a removable battery pack, with a housing in which at least two battery cells are accommodated, wherein the battery cells are electrically connected in series and in parallel via at least one sheet-metal cell connector, with a fuse unit for interrupting the flow of current, wherein the fuse unit has at least one parallel fuse element which is arranged between two battery cells connected in parallel, wherein the parallel fuse element has at least one fuse. It is proposed that the fuse unit has at least one serial fuse element which is arranged in a serial current path and has at least one fuse. This advantageously enables particularly good protection of the battery pack in the event of damage or a defect to be realized.
  • the battery pack is in particular part of a system which is composed of the battery pack and a consumer, whereby the consumer is supplied with energy via the battery pack during operation.
  • the battery pack can be designed, for example, as a hand tool battery pack or as an electric bicycle battery pack.
  • the battery pack is in particular designed as a removable battery pack which is preferably designed to be detachable from the consumer without tools. Alternatively, It is conceivable that the battery pack is firmly attached or integrated into the housing of the consumer.
  • the battery pack is designed in particular to be connectable to a charging device for charging the battery pack. Alternatively or additionally, the battery pack can also be designed in such a way that it can be charged when connected to the consumer.
  • the consumer can be designed in particular as a garden tool, such as a lawnmower or hedge trimmer, as a household appliance, such as an electric window cleaner or handheld vacuum cleaner, as a hand tool, such as an angle grinder, a screwdriver, a drill, a hammer drill, etc., as an electric means of transport, such as an electric bicycle in the form of a pedelec or an e-bike, as an eScooter or as a measuring tool, such as a laser distance measuring device.
  • the consumer is designed as another, in particular portable, device, such as construction site lighting, a suction device or a construction site radio.
  • the battery pack has a housing in which the battery cells are accommodated.
  • the housing of the battery pack is preferably designed as an outer housing.
  • the battery pack in particular the housing of the battery pack, can be detachably connected to the consumer and/or a charging device via a mechanical interface or can be permanently connected.
  • the housing of the battery pack can have one or more housing parts.
  • the housing has at least one housing part that is designed as an outer housing part.
  • the outer housing part delimits the battery pack from the outside and can be touched by a user.
  • the housing can have at least one inner housing part that is completely enclosed by the at least one housing part.
  • the battery pack preferably has a cell holder to hold the battery cells.
  • the cell holder of the battery pack is designed in particular as a housing part, preferably as an inner housing part. However, it is also conceivable that the cell holder is designed partially or completely as an outer housing part.
  • the housing of the battery pack can have one or more cell holders.
  • the housing parts, in particular the cell holders, are connected to one another in a force-, form- and/or material-locking manner. sig connected.
  • the cell holder can also have sleeve-shaped inserts, which in turn are assigned to the protective unit and have at least one reinforcing element and/or a weakening element.
  • the cell holder is preferably made of a plastic, in particular a thermoplastic.
  • the cell holder is preferably made of a temperature-resistant plastic, preferably a fiber-reinforced plastic. Alternatively, it is also conceivable for the cell holder to be made of a metallic material.
  • the cell holder is in particular one-piece or integrally formed. Other materials, for example ceramic, are also conceivable.
  • one-piece is to be understood in particular as a component which is made of one piece and not from several components which are connected to one another in a material-locking and/or force-locking and/or form-locking manner. A one-piece component therefore consists of a single material.
  • one-piece is to be understood as several components which are connected to one another in a material-locking manner, for example via a 2K injection molding or a material bond.
  • a one-piece component can therefore consist of one or more materials.
  • the cell holder is made up of several parts, with the different parts being connected to one another in a force-fitting and/or form-fitting manner.
  • the battery pack can have one or more cell holders that are arranged next to one another and/or one behind the other.
  • the battery pack can be connected to the consumer in a force-fitting and/or form-fitting manner via a mechanical interface.
  • the mechanical interface advantageously comprises at least one actuating element via which the connection of the battery pack to the consumer and/or to the charging device can be released.
  • the actuating element can be designed, for example, as a lock, a button, a lever or a push-button.
  • the actuating element can be arranged on the battery pack or on the consumer.
  • the mechanical interface can comprise guide elements for guiding the battery pack during the connection process and/or centering elements for centering the battery pack during the connection process.
  • the battery pack has at least one electrical interface via which the battery pack can be electrically connected to the consumer and/or to the charging device.
  • the battery pack can be charged and/or discharged via the electrical connection, for example.
  • the electrical interface information can be transmitted from the battery pack to the consumer and vice versa.
  • the electrical interface is preferably designed as a contact interface in which the electrical connection is made via a physical contact between at least two conductive components.
  • the electrical interface preferably comprises at least two electrical contact elements. In particular, one of the electrical contact elements is designed as a plus contact and the other electrical contact element as a minus contact.
  • the electrical interface can have at least one additional contact which is designed to transmit additional information to the consumer and/or to the charging device.
  • the additional contacts can be designed as signal contacts, coding contacts, temperature contacts, bus contacts, etc.
  • the electrical contact elements can be designed, for example, as spring-loaded contact elements in the form of contact tulips or as flat contacts in the form of contact blades.
  • the electrical interface can have a secondary charging coil element for inductive charging.
  • the mechanical interface and the electrical interface can be integrated or designed separately from one another.
  • the battery pack preferably comprises electronics.
  • the electronics can, for example, comprise a circuit board, a computing unit, a control unit, a transistor, a capacitor, and/or a memory unit. Additionally or alternatively, it is also conceivable that information is determined by the electronics.
  • the electronics are designed to control or regulate the battery pack and/or the consumer.
  • the electronics in particular comprise a BMS (battery management system) which is designed to monitor the battery pack.
  • the BMS is in particular designed to prevent overcharging and/or deep discharging of the battery pack.
  • the BMS is preferably designed for correct cell symmetrization.
  • the electronics can also comprise one or more sensor elements, for example a temperature sensor for determining the temperature inside the battery pack or a motion sensor for determining movements.
  • the electronics can alternatively or additionally comprise a coding element, such as a coding resistor.
  • the electrical contact elements of the electrical interface of the battery pack can be arranged on the circuit board of the electronics or connected to the circuit board.
  • a printed circuit board is understood to mean a circuit carrier that has an organic or inorganic substrate, for example IMS.
  • the printed circuit board can be a It can be designed as a rigid circuit board or as a flexible circuit board.
  • the circuit board can also be a populated or unpopulated circuit board.
  • the circuit board can have a single layer or be multi-layered.
  • the cell holder can have at least one single cell receptacle for accommodating a single battery cell and/or at least one multi-cell receptacle for accommodating multiple battery cells.
  • the receptacle is designed in particular such that, when connected to the battery cell, a large part of the outer surface, in particular a large part of the outer surface of the battery cell, is enclosed by the receptacle. In particular, at least 25%, preferably at least 50%, preferably at least 75%, of the outer surface of the battery cell is enclosed by the receptacle.
  • the receptacle is preferably designed in such a way that the at least one battery cell rests against an inner surface of the receptacle and is fixed by the receptacle.
  • the cell holder has a wall between two adjacent receptacles, which spatially and/or electrically and/or thermally insulates the receptacles from one another.
  • the battery cell can be designed as a galvanic cell, which has a structure in which a cell pole is located at one end and another cell pole at an opposite end.
  • the battery cell has a positive cell pole at one end and a negative cell pole at an opposite end.
  • the battery cells are preferably designed as NiCd or NiMh, particularly preferably as lithium-based battery cells or Li-Ion battery cells.
  • the battery cell is designed as a pouch cell or as a prismatic cell.
  • the battery voltage of the battery pack is usually a multiple of the voltage of an individual battery cell and results from the connection (parallel or series) of the battery cells.
  • the battery cell is preferably designed as an at least substantially cylindrical round cell, with the cell poles arranged at the ends of the cylinder shape.
  • the at least one cell connector is designed for electrically connecting the battery cells to one another and in particular to the electronics, preferably to the circuit board and/or to the electrical contact elements.
  • the at least one cell connector can be designed as a single piece, one-piece or multi-piece.
  • the at least a cell connector can be connected to the housing of the battery pack, in particular the cell holder, in a force-fitting and/or form-fitting manner. It is also conceivable that the cell connector is partially or completely overmolded by the housing, in particular the cell holder.
  • the cell connector is made of a metallic material.
  • the cell connector can be made, for example, of pure copper (copper content >95%), a copper alloy or a nickel compound, a steel, in particular hilumin, an aluminum alloy or aluminum.
  • the cell connectors can be materially connected to the battery cells on the end faces or on the outer surface of the battery cells.
  • the cell connector can be completely or partially made of sheet metal. For example, it is conceivable that the cell connector has
  • the parallel fuse element is in particular formed in one piece with the cell connector.
  • the parallel fuse element is arranged between the battery cells connected in parallel such that the battery cells connected in parallel are electrically connected via the parallel fuse element.
  • the parallel fuse element is thus arranged in the parallel current path between the two battery cells.
  • the serial fuse element is in particular formed in one piece with the cell connector.
  • the serial fuse element is arranged between the battery cells connected in series such that the battery cells connected in series are electrically connected via the serial fuse element.
  • the serial fuse element is thus arranged in the serial current path between the two battery cells.
  • the fuse is designed in such a way that a circuit is interrupted when the fuse melts.
  • the fuse is designed in particular in such a way that it is triggered and melts when a threshold value for current and time is exceeded.
  • the fuse be connected in a web-shaped manner with a preferably designed with a substantially constant cross-section.
  • the cross-section along a longitudinal extension of the fuse is substantially constant.
  • the cross-section is variable, with the cross-section along the longitudinal extension of the fuse varying in particular in a range between 10% and 100%, preferably between 25% and 50%.
  • the fuse has two parallel, in particular coaxial, sections, which are connected to one another, in particular directly, via a curved section. This advantageously allows the triggering characteristics of the fuse to be optimized.
  • the curved section preferably extends along at least one circular path.
  • the at least one fuse element has two fuses that are curved in such a way that the distance between the fuses is smallest in the middle. This can advantageously optimize the stability of the cell connector.
  • the fuse unit has a first parallel fuse element with a single fuse and a second parallel fuse element with two fuses, wherein the fuse of the first parallel fuse element has a larger cross-section.
  • the cross-sections are designed such that the first parallel fuse element has essentially the same triggering time as the second parallel fuse element.
  • the cross section of the fuse of the first parallel fuse element is smaller than the sum of the cross sections of the fuses of the second parallel fuse element. This can advantageously further improve the triggering characteristics.
  • the cross section of the fuse of the first parallel fuse element corresponds to approximately 80% to 99% of the sum of the cross sections of the fuses of the second parallel fuse element.
  • the fuse element has two fuses, with only one fuse being straight and the other being curved. This advantageously ensures optimal stability and triggering characteristics in a small installation space.
  • the cell connector has one or more connection sections, via which the cell connector is connected to a battery cell in particular in a materially bonded manner.
  • the material bond can be achieved, for example, using a resistance welding process or a laser welding process.
  • the cell connector lies partially or completely directly on the cell pole of the battery cell.
  • connection section has a substantially circular contour, with a diameter of the contour corresponding substantially to a cell diameter of the battery cell. This can advantageously optimize the electrical contact and heat dissipation.
  • the contour of the connection section can also be larger or smaller than the cell diameter. In particular, the diameter of the contour is in a range between 80% and 110% of the cell diameter.
  • the fuse extends into the connection section, preferably into two connection sections connected to one another via the fuse. This advantageously allows the fuse to be lengthened and the triggering characteristics to be optimized.
  • the fuse extends into the connection section by at least 3%, preferably by at least 5%, preferably by at least 10% of the cell diameter.
  • connection sections of the cell connector have a maximum of one serial safety element. This can advantageously further optimize the triggering characteristics.
  • the connection sections have a maximum of 2 parallel safety elements.
  • connection sections are connected to two fuses via a serial fuse element, whereby the two fuses are directly connected to each other via a contacting element.
  • the triggering characteristic can advantageously be further improved by this measure.
  • the contacting element is designed to be connected to the electronics, in particular to a circuit board of the electronics, a busbar or another electrically conductive component.
  • Fig. 1 is a perspective view of an electric bicycle with a battery pack according to the invention
  • Fig. 2 is a perspective view of an exemplary battery pack
  • Fig. 3 is a perspective view of the battery pack according to Fig. 2 without housing;
  • Fig. 4 is a front view of a cell holder of the battery pack according to Fig. 3 with a cell connector;
  • Fig. 5 shows an alternative embodiment of a cell connector. Description of the embodiments
  • a consumer 10 with a battery pack 100 is shown in a perspective side view.
  • the consumer 10 is designed, for example, as an electrically powered means of transport 12, in particular as an electric bicycle 14.
  • the electric bicycle 14 can be designed, for example, as a pedelec or as an e-bike.
  • the electric bicycle 14 has a frame 18 or a bicycle frame. Two wheels 20 are connected to the frame 18.
  • the consumer 10 also has a drive unit 22, which includes an electric motor.
  • the electric motor is preferably designed as a permanent magnet-excited, brushless DC motor.
  • the electric motor is designed, for example, as a mid-engine, although a hub motor or the like is also conceivable.
  • the drive unit 22 comprises a control unit (not shown) which is designed to control or regulate the electric bicycle 14, in particular the electric motor.
  • the electric bicycle 14 has a pedal crank 24.
  • the pedal crank 24 is connected to a pedal crank shaft (not shown).
  • the control unit and the drive unit 22 with the electric motor and the pedal crankshaft are arranged in a drive housing 26 connected to the frame.
  • the drive movement of the electric motor is preferably transmitted to the pedal crankshaft via a gear (not shown), the amount of support provided by the drive unit 22 being controlled or regulated by means of the control unit.
  • the consumer 10 is electrically and mechanically connected to the battery pack 100, which is designed to supply energy to the drive unit 22.
  • the battery pack 100 is designed, for example, as a removable battery pack 102.
  • the battery pack 100 is, for example, completely accommodated in the frame 18 of the electric bicycle 14 in the connected state.
  • the connection can be made by axially inserting the battery pack 100 into the down tube of the frame 18 or by the battery pack 100 can be pivoted sideways into the frame 18.
  • the battery pack 100 is designed in such a way that the battery pack 100 can be fastened to an outer side of the frame 18.
  • FIG. 2 shows a perspective view of the battery pack 100.
  • the battery pack 100 has a housing 104, which is designed as an outer housing.
  • the housing 104 has, for example, a rectangular cross-section and extends essentially over the entire length of the battery pack 100.
  • the battery pack 100 has a charge level indicator 106, which is arranged on the housing 104 of the battery pack 100 and is designed to display the charge level of the battery pack 100.
  • the housing 104 of the battery pack 100 is connected to two connecting plates 108.
  • the connecting plates 108 are screwed to the housing 104 of the battery pack 100, for example, but it would also be conceivable for the connecting plates 108 to be connected to the housing 104 by means of a different type of connection or to be formed integrally with the housing 104 of the battery pack 100.
  • the first connecting plate 110 comprises a locking unit 113, which can be connected to a corresponding locking unit (not shown) of the electric bicycle 14.
  • the second connecting plate 112 comprises an electrical interface (not shown) for electrically connecting the battery pack 100 to the electric bicycle 14.
  • the battery pack 100 is shown without the housing 104 in a perspective view.
  • the battery pack 100 comprises two cell holders 114, in each of which ten battery cells 116 are arranged, for example.
  • the battery cells 116 are designed, for example, as cylindrical Li-ion round cells.
  • the battery cells 116 are arranged parallel to one another in a cell holder 114 and begin and end at the same height.
  • the two cell holders 114 are arranged one behind the other, so that the battery cells 116 of the first cell holder 114 are arranged coaxially to the battery cells 116 of the second cell holder 114.
  • the cell holder 114 is, for example, designed in several parts, whereby the individual components of the cell holder 114 are preferably connected to one another in a force- and/or are positively connected. Alternatively or additionally, a material connection is also conceivable. Alternatively, a one-piece design of the cell holder 114 would also be conceivable.
  • the cell holder 114 is made, for example, from a plastic, in particular from a hard plastic.
  • the cell holders 114 each comprise, for example, ten receptacles 120 (see Figure 4), which are designed to hold the battery cells 116.
  • the receptacles 120 are, for example, designed as individual cell receptacles 121 for holding a single battery cell
  • the battery pack 100 has an electronics unit 126, which comprises a circuit board 128.
  • the electronics unit 126 comprises a control unit for regulating or controlling the battery pack 100.
  • the circuit board 128 comprises electronic components that are not shown.
  • the circuit board 128 of the electronics unit 126 is electrically connected to the battery cells 116 by means of cell connectors 130.
  • the cell connectors 130 can be connected to the circuit board 128 in a materially bonded manner, for example, via a welded connection or a soldered connection.
  • the cell connectors 130 are connected to the battery cells 116 at the cell poles
  • the cell connectors 130 are made of an electrically conductive, in particular metallic, material.
  • the cell connectors 130 are made of a high-purity, nickel-plated steel, for example Hilumin.
  • the cell connectors 130 are made of sheet metal.
  • Figure 4 shows a front view of the cell holder 114 according to Figure 3.
  • the cell holder 114 comprises, for example, cell connectors 130 on both sides. On the side of the cell holder 114 shown, it comprises, for example, three cell connectors 130: a first cell connector 150, a second cell connector 152 and a third cell connector 154.
  • the battery cells 116 have a positive cell pole 156 and a negative cell pole 158.
  • the positive cell poles 156 and the negative cell poles 158 of the battery cells 116 are arranged on opposite sides of the battery cells 116.
  • the battery cells 116 are arranged in the cell holder 114 in different different orientations, whereby both positive cell poles 156 and negative cell poles 158 are arranged on the shown sides of the cell holder 114.
  • battery cells 116 with different cell poles 117 are electrically connected to one another via one of the cell connectors 130, and in a parallel current path, battery cells 116 with the same cell poles 117 are electrically connected to one another via one of the cell connectors 130.
  • the first cell connector 150 connects, for example, two battery cells 116 via the respective positive cell poles 156 and thus connects them in parallel.
  • the first cell connector 150 comprises a connection section 160 for each battery cell 116, via which the cell connector 150 is connected to the battery cell 116.
  • connection sections 160 have a substantially circular contour 162, wherein the diameter of the contour 162 substantially corresponds to a cell diameter of the battery cells 116.
  • the diameter of the contour 162 deviates from the cell diameter by only a few percent.
  • the cell connectors 130 are formed from a sheet metal, for example.
  • the connection of the cell connectors 130 to the cell poles 117 of the battery cells 116 is carried out, for example, using a resistance welding process at, for example, two welding points 164. In the area of the welding points 164, the cell connector 130 has dimples (not shown) on a side facing the cell pole 117.
  • the first cell connector 150 also has two contacting elements 166, which are designed to connect the cell connector 130, in particular the battery cells 116, to the electronics 126, in particular the circuit board 128.
  • the contacting elements 166 are designed in such a way that they are bent out of the plane of the connection sections 160 and, for example, protrude into a space between the circuit board 128 and the cell holder 114.
  • the second cell connector 152 is designed for the electrical connection of four battery cells 116, each with two positive cell poles 156 and two negative cell poles 158.
  • the cell connector 130 thus connects the respective battery cells 116 both in parallel and in series.
  • the battery pack 100 in particular the cell connector 130, also has a fuse unit 180 for interrupting the flow of current.
  • the fuse unit 180 is assigned at least one parallel fuse element 182, which is arranged in the parallel current path, and at least one serial fuse element 184, which is arranged in the serial current path.
  • the second cell connector 152 has, for example, two parallel fuse elements 182 and no serial fuse element in the serial current path. In the area of the serial connection, the second cell connector 152 has a contacting element 166.
  • the first parallel fuse element 186 is arranged, for example, between two negative cell poles 158.
  • the first parallel fuse element 186 is arranged in particular between two connection sections 160 of the cell connector 130 and connects them electrically.
  • the first parallel fuse element 186 is designed as a fuse 190 and in one piece with the cell connector 130.
  • the fuse 190 of the first parallel fuse element 186 is designed, for example, in the shape of a web.
  • the fuse 190 of the first parallel fuse element 186 extends in a straight line and has a constant cross-section 192. To extend the fuse 190, it projects into the adjacent connection sections 160, so that the diameter of the connection section 160 immediately adjacent to the fuse 190 is reduced by cutouts 194.
  • the second parallel fuse element 196 of the second cell connector 152 connects, for example, two positive cell poles 156 electrically to one another.
  • the second parallel fuse element 196 has, for example, two fuses 190.
  • Both fuses 190 of the second cell connector 152 have a constant cross-section 192.
  • the two cross-sections 192 are, for example, of the same design, with the sum of the cross-sections 192 of the fuses 190 of the second parallel fuse element 196 being larger, in particular approximately 10% larger, than the cross-section 192 of the fuse 190 of the first parallel fuse element 186 of the second cell connector 152.
  • the first fuse 200 of the second parallel fuse element 196 is designed in the shape of a web with, for example, three sections.
  • the first fuse 200 has two coaxial sections 202 that run essentially in a straight line.
  • the coaxial sections 202 protrude, for example, into the adjacent connection sections 160.
  • the first fuse 200 has a curved section 204.
  • the curved section 204 extends, for example, in a circle in the direction of the adjacent second fuse 206.
  • the second fuse 206 of the second parallel fuse element 196 has, for example, essentially the same length as the first fuse 200.
  • the second fuse 206 is essentially completely curved, with the curvature being circular in the direction of the first fuse 200.
  • the third cell connector 154 has two parallel fuse elements 182 for connecting two identical cell poles 117 and a serial fuse element 184 for connecting different cell poles 117.
  • the two parallel fuse elements 182 of the third cell connector 154 each have two fuses 190, wherein the cross sections 192 are constant and the sums of the cross sections 192 essentially correspond.
  • the serial fuse element 184 comprises, for example, two fuses 190.
  • the two fuses 190 of the serial fuse element 184 are, for example, curved. Alternatively, a partially or completely straight course would also be conceivable.
  • the fuses 190 of the serial fuse element 184 have an identical and essentially constant cross-section 192.
  • the sum of the cross-sections 192 of the fuses in the serial current path are larger than the sum of the cross-sections 192 of the fuses 190 in the parallel current path, preferably larger by a factor of 0.5, preferably larger by a factor of 1.0, with the factor being, for example, 1.4.
  • Figure 5 shows a front view of an alternative embodiment of a cell connector 130a according to the invention.
  • the cell connector 130a is designed for the electrical connection of ten battery cells and has ten connection sections 160a, which essentially correspond to the connection sections 160 of the previously described cell connector 130.
  • the cell connector 130a is designed for parallel connection of six battery cells to one another and four battery cells to one another, with the parallel connection being carried out via a single parallel fuse element 182a.
  • Each connection section 160a thus has a maximum of two parallel fuse elements 182a.
  • the number of parallel fuse elements 182a corresponds to the number of battery cells to be connected in parallel.
  • the parallel fuse elements 182a each have, for example, a single fuse 190a or two fuses 190a.
  • the fuses 190a are designed in a web-like manner as described above.
  • the cross sections 192a of the fuses 190a are designed to be constant as an example, but varying cross sections would also be conceivable as an alternative.
  • the fuses 190a are designed to be curved or straight as an example, although a combination would also be conceivable.
  • the cell connector 130a also has two serial fuse elements 184a.
  • the serial fuse elements 184a are essentially identical in design.
  • the serial fuse elements 184a of the cell connector 130a have two fuses 210a, for example.
  • the fuses 210a are, for example, web-shaped and straight.
  • the fuses 210a run essentially parallel to one another, for example.
  • the fuses 210a are not directly connected to two connection sections 160a of the cell connector 130a, but are only directly connected on one side to one of the connection sections 160a. On the opposite side of the fuse 210a, it is connected to the contacting element 166a.
  • the electrical connection of the two connection sections 160a via the serial fuse element 184a is thus via two fuses 210a, which are connected to each other via the contacting element 166a.
  • the cell connector 130a also has a parallel fuse element 182a, which connects two connection sections 160a via two fuses 210a, which are connected via a contacting element 166a.
  • the fuse unit 180a of the cell connector 130a is advantageously designed such that each connection section 160a is directly connected to at least one fuse 190a, 210a. This advantageously allows the triggering characteristics to be optimized.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

L'invention concerne un bloc-batterie rechargeable, en particulier un bloc-batterie rechargeable interchangeable, comprenant un boîtier dans lequel au moins deux éléments rechargeables sont logés, les éléments rechargeables étant électriquement connectés en série et en parallèle par l'intermédiaire d'au moins un connecteur d'élément sous la forme d'une feuille métallique, comprenant une unité de fusible pour interrompre la circulation du courant, l'unité de fusible comprenant au moins un élément fusible en parallèle qui est disposé entre deux éléments rechargeables qui sont connectés ensemble en parallèle, l'élément fusible en parallèle comprenant au moins un fusible de sécurité. L'invention propose que l'unité de fusible présente au moins un élément fusible en série qui est disposé dans un trajet de courant en série et présente au moins un fusible de sécurité.
PCT/EP2024/065579 2023-06-09 2024-06-06 Bloc-batterie rechargeable Ceased WO2024251868A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023205391.8A DE102023205391A1 (de) 2023-06-09 2023-06-09 Akkupack
DE102023205391.8 2023-06-09

Publications (1)

Publication Number Publication Date
WO2024251868A1 true WO2024251868A1 (fr) 2024-12-12

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PCT/EP2024/065579 Ceased WO2024251868A1 (fr) 2023-06-09 2024-06-06 Bloc-batterie rechargeable

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DE (1) DE102023205391A1 (fr)
WO (1) WO2024251868A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150050531A1 (en) * 2012-03-05 2015-02-19 Husqvarna Ab Battery cell connector
TWI628887B (zh) * 2015-05-11 2018-07-01 睿能創意公司 用於攜帶型多單元電能儲存裝置之電連接器
DE102017208834A1 (de) 2017-05-24 2018-11-29 Robert Bosch Gmbh Ableiterelement einer Elektrodenanordnung von einer Mehrzahl von elektrochemischen Zellen
WO2021060704A1 (fr) * 2019-09-24 2021-04-01 주식회사 엘지화학 Module de batterie comprenant une plaque de barre omnibus, bloc-batterie le comprenant, et dispositif électronique
EP4113725A1 (fr) * 2021-06-30 2023-01-04 Robert Bosch GmbH Bloc d'accumulateur
CN116031590A (zh) * 2021-10-25 2023-04-28 创科无线普通合伙 用于连接电池组中的电池单元的端子的电连接装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013131588A2 (fr) 2012-03-05 2013-09-12 Husqvarna Ab Système de bloc-batterie
CN108448021B (zh) 2018-04-11 2024-11-19 江苏正力新能电池技术股份有限公司 一种电池模组
KR102598669B1 (ko) 2018-09-11 2023-11-06 에스케이온 주식회사 버스 바 및 이를 구비하는 배터리 팩
DE102020213480A1 (de) 2020-10-27 2022-04-28 Robert Bosch Gesellschaft mit beschränkter Haftung Batterie

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150050531A1 (en) * 2012-03-05 2015-02-19 Husqvarna Ab Battery cell connector
TWI628887B (zh) * 2015-05-11 2018-07-01 睿能創意公司 用於攜帶型多單元電能儲存裝置之電連接器
DE102017208834A1 (de) 2017-05-24 2018-11-29 Robert Bosch Gmbh Ableiterelement einer Elektrodenanordnung von einer Mehrzahl von elektrochemischen Zellen
WO2021060704A1 (fr) * 2019-09-24 2021-04-01 주식회사 엘지화학 Module de batterie comprenant une plaque de barre omnibus, bloc-batterie le comprenant, et dispositif électronique
EP4113725A1 (fr) * 2021-06-30 2023-01-04 Robert Bosch GmbH Bloc d'accumulateur
CN116031590A (zh) * 2021-10-25 2023-04-28 创科无线普通合伙 用于连接电池组中的电池单元的端子的电连接装置

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