WO2021144064A1 - Élément de batterie rechargeable et bloc-batterie rechargeable comportant un élément de batterie rechargeable - Google Patents

Élément de batterie rechargeable et bloc-batterie rechargeable comportant un élément de batterie rechargeable Download PDF

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Publication number
WO2021144064A1
WO2021144064A1 PCT/EP2020/084588 EP2020084588W WO2021144064A1 WO 2021144064 A1 WO2021144064 A1 WO 2021144064A1 EP 2020084588 W EP2020084588 W EP 2020084588W WO 2021144064 A1 WO2021144064 A1 WO 2021144064A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery cell
cell
battery pack
battery
plastic
Prior art date
Application number
PCT/EP2020/084588
Other languages
German (de)
English (en)
Inventor
Christoph Klee
Andreas GONSER
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
Priority to CN202080093388.8A priority Critical patent/CN114946076A/zh
Publication of WO2021144064A1 publication Critical patent/WO2021144064A1/fr

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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
    • 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
    • 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
    • H01M50/202—Casings or frames around the primary casing of a single cell or a single battery
    • 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
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • 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 publication DE 10 2016 203 427 A1 describes a battery pack with battery cells and battery pack electronics that comprise a flexible printed circuit board.
  • the battery pack electronics have a microcontroller for monitoring individual cell voltages.
  • the battery cells do not have an insulating jacket for contacting.
  • the invention relates to a battery cell for a battery pack, with a jacket surface, a front side and a rear side, the jacket surface having a single cell voltage monitoring area, the single cell voltage monitoring area being electrically connected to a cell pole of the battery cell in such a way that a voltage of the battery cell is at the single cell voltage monitoring area the jacket surface can be measured for individual cell monitoring.
  • the individual cell voltage monitoring area be made of a plastic or a lacquer. In this way, the handling of the battery cells can advantageously be improved and made safer, in particular during the assembly process of a battery pack.
  • the battery pack is in particular part of a system that is composed of the battery pack and a consumer, the consumer being supplied with energy via the battery pack during operation.
  • the battery pack is designed in particular as an exchangeable battery pack.
  • the battery pack is designed in particular to be connectable to a charging device for charging the battery pack.
  • the housing of the battery pack is designed in particular as an outer housing.
  • the battery pack, in particular the housing of the battery pack can be releasably connected to the consumer and / or the charging device via a mechanical interface.
  • the housing of the battery pack can have one or more housing parts.
  • the housing parts are non-positively, positively and / or cohesively connected to one another.
  • the consumer can use it as a garden tool, such as a lawn mower or hedge trimmer, as a household appliance, such as an electric window cleaner or hand vacuum cleaner, as a hand machine tool, such as an angle grinder, a screwdriver, a drill, a hammer drill, etc. or as a measuring tool, such as a laser distance measuring device.
  • the consumer is designed as another device, in particular a portable device, such as construction site lighting, a suction device or a construction site radio.
  • the battery pack can be positively and / or positively connected to the consumer via the 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 button, lever or button.
  • 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, for example, be charged and / or discharged via the electrical connection.
  • information can be transmitted via the electrical interface.
  • the electrical interface is preferably designed as a contact interface in which the electrical connection is made via a physical contact of at least two conductive components.
  • the electrical interface preferably comprises at least two electrical contacts. In particular, one of the electrical contacts is designed as a plus contact and the other electrical contact is designed as a minus contact.
  • the electrical interface can have a secondary charging coil element for inductive charging.
  • the at least one battery cell is arranged in the housing of the battery pack and can be electrically connected to the consumer via the electrical contact device.
  • the rechargeable battery cell can be designed as a galvanic cell which has a structure in which one cell pole comes to lie 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.
  • tive cell pole preferably designed as NiCd or NiMh cells, particularly preferably as lithium-based battery cells or Li-ion battery cells.
  • 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 rechargeable battery cell is preferably designed as an at least essentially cylindrical round cell, the cell poles being arranged at the ends of the cylindrical shape.
  • 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 battery pack preferably has battery pack electronics, it being possible for the battery pack electronics to include a storage unit on which the information is stored. Additionally or alternatively, it is also conceivable that the information is determined by the battery pack electronics. The information can be, for example, a charge status of the battery pack, a temperature within the battery pack, a coding or a remaining capacity of the battery pack. It is also conceivable that the battery pack electronics are designed to regulate or control the charging and / or discharging process of the battery pack.
  • the battery pack electronics can for example have a printed circuit board, a computing unit, a control unit, a transistor, a capacitor, and / or the memory unit.
  • the electronics can also have one or more sensor elements, for example a temperature sensor for determining the temperature inside the battery pack.
  • the battery pack electronics can alternatively or additionally have a coding element, such as a coding resistor.
  • the individual cell voltage monitoring area is provided in particular for connection to a measuring contact of the battery pack.
  • the positioning of the individual cell voltage monitoring area is particularly dependent on the design or structure of the battery pack.
  • the rechargeable battery cell can have one, two or more individual cell voltage monitoring areas.
  • the entire surface of the jacket is preferably designed as an individual cell voltage monitoring area, so that the measuring contact can be placed at any location on the jacket surface for monitoring the individual cell voltage. It is also proposed that the battery cell have a plus pole and a minus pole, the jacket surface being electrically connected to the minus pole. This allows the voltage to be monitored via the negative pole.
  • the rechargeable battery cell have a housing which is designed to be metallic.
  • the metallic housing advantageously gives the battery cell mechanical stability and protects it.
  • the battery cell is designed in particular as a round cell with a sheet metal pot housing.
  • the sheet metal pot housing corresponds to a housing made of deep-drawn steel.
  • the housing of the battery cell can partially form the outer surface of the battery cell. In the individual cell voltage monitoring area, however, the outer surface of the battery cell is not formed by the metallic housing.
  • the metallic housing can be completely or partially covered and / or coated by the plastic. In particular, the metallic housing is covered or coated by the plastic, at least in the individual cell voltage monitoring area.
  • the housing is made of a plastic that at least partially, in particular completely, has a certain electrical conductivity that is sufficient for individual cell voltage monitoring.
  • the housing is at least partially, in particular completely, formed by the minus pole.
  • the plastic is designed as a pure plastic or as a filled plastic.
  • the plastic is in particular a polymer or polymer mixture.
  • the plastic is preferably designed as a lei tender plastic.
  • the filled plastic has a thermoplastic plastic which is filled with a conductive material, in particular carbon or a metal, preferably silver, nickel or copper.
  • the filled plastic is therefore an extrinsically conductive polymer.
  • the pure plastic preferably consists of polyethine, polyaniline, polypyrrole, poly-3,4-ethylenedioxythiophene, polyfluorene, or poly (p-phenylene).
  • the carbon can be, for example, soot, carbon nanotubes and / or graphene.
  • the pure plastic is therefore an intrinsically conductive polymer.
  • the jacket surface be formed by a shrink tube.
  • the shrink tube consists of the plastic, the plastic preferably is designed to be elastic.
  • the jacket surface is formed by a plastic tube made of the plastic. During the assembly process, the housing or sheet metal housing of the battery cell can be pushed into the plastic tube. It is also conceivable that the plastic tube is heated for thermal expansion prior to assembly so that when the plastic tube cools, a force-fit connection is created between the plastic tube and the housing of the battery cell as a result of the shrinking of the plastic tube.
  • the plastic pipe can have a collar on one end face and / or on an opposite rear face, which collar is provided to isolate the minus and / or plus pole.
  • the battery cell have a first insulation element which is arranged between the negative pole and the positive pole, and a second insulation element which is arranged between the negative pole and the positive pole.
  • the first insulation element and the second insulation element are arranged on opposite sides of the negative pole.
  • the insulation elements can be formed, for example, from an electrically insulating plastic or an insulation paper.
  • the lacquer be designed as a graphite lacquer.
  • Under egg nem lacquer in particular a liquid or powdery coating material should be understood that can be applied thinly to objects. When applied, the paint forms a continuous, solid film.
  • the lacquer can contain polymers.
  • the paint preferably has a lower conductivity than the housing of the Ak kuzelle on which the paint is applied.
  • the invention also relates to a measuring device for monitoring the individual cell voltage of a battery pack, having a battery cell as described above and a measuring contact.
  • the measuring device is assigned in particular to battery pack electronics of the battery pack and is thus part of a battery management system (BMS).
  • BMS battery management system
  • the voltage of individual cells of the battery pack is made available to the battery pack electronics via the measuring device.
  • the measuring contact rests with a contact surface on the outer surface of the battery cell.
  • the connection between the measuring contact can be made via a force fit and / or form fit, for example wise about jamming. Alternatively, it is also conceivable for the connection to take place via a material bond, for example via gluing.
  • a transition resistance between the measuring contact and the outer surface of the battery cell is in a range between 100 ohms and 100 kOhm, in particular between 1 kOhm and 10 kOhm or between 2 kOhm and 20 kOhm. Reliable individual cell voltage monitoring can advantageously be guaranteed in this area.
  • the measuring contact has a contact surface that is between 4 mm 2 and 50 mm 2 in size.
  • the invention also relates to a battery pack with a measuring device as described above.
  • FIG. 1 shows an example of a view of a handheld power tool with a battery pack according to the invention
  • FIG. 2 shows a perspective exploded view of the battery pack
  • Fig. 3 is a perspective view of a flexible printed circuit board of the battery pack
  • FIG. 5 shows a longitudinal section through a rechargeable battery cell according to the invention.
  • FIG. 1 shows an electrical device embodied as a handheld power tool 300, which is embodied, for example, as a cordless drill. Accordingly, the handheld power tool 300 in the embodiment shown is mechanically and electrically connected to a battery pack 100 for the mains-independent power supply. It should be noted, however, that the present invention is not limited to cordless drills, but rather can be used in different handheld power tools 300.
  • the handheld power tool 300 has a gear 330 arranged in a housing 305 for transmitting a torque generated by a drive motor 335 to a drive shaft rotating about an axis x, on which a tool holder 320 for an insert tool (not shown) is attached, and a handle 315.
  • an electronic system 370 is arranged, which is designed to control or regulate the handheld tool machine 300, in particular the drive motor 335.
  • the handle 315 serves as a support surface for one hand of an operator of the handheld power tool 300.
  • An operating element 310 is arranged in the area of the handle 315.
  • the operating element 310 is designed as an operating switch for manual control of the handheld power tool 300.
  • the operating element 310 protrudes from the housing 305 and is manually accessible for the user, so that, in a manner known per se, a pressure movement of the first operating element 310 controls and / or regulates the drive motor, preferably as a function of the adjustment path of the first operating element 310 is made possible.
  • the battery pack 100 is fastened to the handle 315 of the handheld power tool 300 via an interface 380 and locked by a locking unit 318.
  • the fastening and / or the locking is carried out via a force-fit and / or form-fit connection.
  • the arrangement of the battery pack 100 on an underside 316 of the handle 315 does not interfere with the operation of the handheld power tool 300.
  • the locking unit includes, inter alia, a locking element 210 and an actuation element 220. By actuating the actuation by means of 220, the battery pack 100 can be released from the handle 315 of the handheld power tool 300.
  • the sliding battery pack is designed as a sliding battery pack and has an interface 180 corresponding to the interface 380 of the handheld power tool 300.
  • the sliding battery pack can also be designed as a rotating or swiveling battery pack, with the battery pack 100 being releasably lockable on the side opposite the pivot axis by locking, screwing, clamping or bracing on the housing 305 of the handheld power tool 300. In this way, a possible fall of the battery pack 100 from the housing 305 can be effectively counteracted.
  • the interface 180 is designed for detachable attachment of the battery pack 100 to a handheld power tool 300 and / or to a charger.
  • the interface 180 is designed in particular for the releasable mechanical and electrical connection to the corresponding interface 380 of the handheld power tool 300 or a corresponding interface of the charger.
  • the battery pack 100 is pushed onto the underside 316 of the handle 315. In the position shown in FIG. 1, the battery pack 100 is locked by the locking element 210 on the handle 315. By actuating the actuating means 220, the battery pack 100 can be released from the handle 315 of the handheld power tool 300. After the battery pack 100 has been unlocked, it can be separated from the handle 315.
  • the locking element 210 is brought into engagement with a corresponding receptacle (not shown in more detail) in the handle 315 of the handheld power tool 300.
  • Figure 2 shows the battery pack 100 in an exploded view.
  • the battery pack 100 has a battery pack housing 110 with, for example, a plurality of housing parts 120.
  • a housing part 120 is embodied, for example, as a cell holder 600 with a plurality of battery cells 400, not shown in detail, connected in series.
  • the battery pack 100 is designed, for example, as a two-row battery pack 100, with five battery cells 400 being arranged in a row.
  • the cell holder 600 takes on both the fixation of the battery cells 400 in the battery pack housing 110 and the cooling of the battery cells 400 and is made of a thermally conductive material, for example aluminum or a plastic.
  • Each battery cell 400 has a lateral surface 402 running parallel to a longitudinal axis x of the battery cell 400, the lateral surface 402 being delimited by two end faces 412, 414 which are perpendicular to the longitudinal axis x and on which the electrical poles or cell poles 406 of the battery cells 400 are located condition.
  • the battery cells 400 are connected to one another via cell connectors 500.
  • the cell connectors 500 are designed for the electrical connection of the battery cells 400.
  • the cell connector 500 allows the battery cells 400 to be electrically interconnected in parallel and / or in series.
  • the cell connectors 500 are essentially plate-shaped and are arranged on the end faces of the battery cells 400 and cover them.
  • the cell holder 600 thus has two opposite openings for each battery cell 400, on which the battery cell 400 can be connected to a cell connector 500.
  • the individual battery cells 400 are accommodated at a distance from one another for mechanical fixing in the cell holder 600.
  • the battery pack 100 has battery pack electronics 800.
  • the battery pack electronics 800 are designed in particular to control or regulate the battery pack 100 or the system from the battery pack 100 with the handheld power tool 300 connected.
  • the battery pack electronics 800 have a printed circuit board 810.
  • the circuit board 810 is made of a fiber-reinforced plastic, for example.
  • Electrical contact elements 143 are arranged on the printed circuit board 810.
  • the circuit board 810 comprises, for example, five contact elements 143, the outer contact elements 143 as power contacts 144 and the inner contact elements 143 as information contact elements 145 are trained.
  • the information contact elements 145 are designed to transmit information to the handheld power tool 300 and / or to the charger.
  • the information contact elements 145 can be designed, for example, as coding elements or for the transmission of temperature information from the battery pack 100.
  • the power contacts 144 are each connected to one of the cell connectors 500 via a current conductor 502.
  • the circuit board 810 includes, for example, further electronic components such as resistors, capacities and a microcontroller, which are not shown in detail.
  • the battery pack electronics 800 have a flexible circuit board 812 with several measuring contacts 840.
  • the flexible printed circuit board 812 is shown in FIG. 3 in a perspective view.
  • the circuit board 810 and the flexible circuit board 812 are arranged adjacent to one another or one above the other.
  • the circuit board 810 and the flexible circuit board 812 are arranged inside the battery pack housing 110 and outside the cell holder 600.
  • the flexible printed circuit board 812 is preferably arranged closer to the cell holder 600 than the printed circuit board 810.
  • the flexible printed circuit board 812 preferably rests on the cell holder 600.
  • the flexible printed circuit board 812 is fastened to the cell holder 600 in such a way that, as in the embodiment shown in FIG. 2, it is clamped between the cell holder 600 and a further housing component.
  • the flexible printed circuit board 812 is also connected, for example, to the microcontroller, which is not provided.
  • the flexible printed circuit board 812 generally consist of a base material which has a multiplicity of individual conductor tracks 802 which form a contact area 803 at their end.
  • the conductor tracks 802 are protected by a protective layer, for example solder mask, which, with the exception of the connection contacts or measuring contacts 840, extends over the entire surface of the circuit board.
  • the contact surfaces 803 are preferably flat.
  • the flexible printed circuit board 812 has a flexural rigidity which is at least partially configured in such a way that a bending deformation of the flexible printed circuit board 812 is possible at least in some areas in the assembled state.
  • the bending deformation of the flexible printed circuit board 812 can take place in such a way that a center plane of the circuit board 812 is in each case in a region of the bending deformation is deformed by an angle f with respect to an original position.
  • the flexible printed circuit board 812 can be variably adapted to the geometric shape of the battery pack housing 110 or the cell holder 600.
  • the flexible printed circuit board 812 has a plurality of measuring contacts 840 that correspond to battery cells 400.
  • the measuring contacts 840 are assigned to a measuring device which is designed to monitor the voltage of individual cells.
  • Each measuring contact 840 is intended to make electrical contact with a corresponding battery cell 400, the measuring contacts 840 advantageously being in the form of a bendable contact tongue 842, preferably in the form of two oppositely arranged, bendable contact tongues 842 which, as shown in FIG Corresponding openings 602 are inserted in the cell holder 600.
  • the contact tongues 842 are provided for making electrical contact with the battery cells 400, in particular for monitoring individual voltages.
  • FIG. 4 shows schematically the introduction of a contact tongue 842 into an opening of a cell holder 600.
  • the contact tongues 842 are inserted into the cell holder 600 with the aid of a tool (not shown) in recesses 602 of the cell holder 600, the contact tongues 842 when the battery cells are inserted 400 can be deformed by the angle f compared to an original position.
  • the recesses 602 are in particular arranged in an area that adjoins a jacket surface of the battery cells 400.
  • the battery cell is arranged in the cell holder 600 essentially without any gaps.
  • the contact tongue 842 is clamped between the cell holder 600 and the battery cell 400, where alternatively the contact tongues 842 can be welded or soldered to the Ak battery cells 400 for electrical contacting.
  • the angle f has a value of approximately 180 ° after it has been introduced, a value between 10 ° and 200 °, preferably a value between 30 ° and 190 °, also being possible.
  • the individual battery cells 400 are connected directly to the flexible printed circuit board 812 via the contact tongues 842. In the illustrated advantageous embodiment of a flexible printed circuit board 812 with each Two contact tongues 842 arranged opposite one another, when the battery cells 400 are inserted into the cell holder 600, a uniform pull in both directions onto the flexible printed circuit board 812 is created.
  • the flexible printed circuit board 812 rests with the contact tongue 842 on the outer surface of the battery cells 400 and contacts them via the conductor tracks 802.
  • the contact is made in a single cell voltage monitoring area 420 of the outer surface 402 of the battery cell.
  • the flexible circuit board 812 preferably has only a partial protective layer or no protective layer. So that the individual voltage monitoring can be implemented via the flexible lyre plate 812 resting on the surface of the battery cells 400, a certain electrical conductivity of the surface 402 of the battery cells 400 is necessary.
  • a battery cell 400 according to the invention is shown in Fig. 5 in a longitudinal section Darge provides.
  • the battery cell 400 has a jacket surface 402 which is at least partially, in particular completely, electrically conductive and consists of a plastic.
  • the battery cell 400 is designed, for example, as a lithium-ion battery cell.
  • the battery cell 400 is designed as a round cell 404 and has two cell poles 406.
  • a cell pole 406 is designed as a positive pole 408 and a cell pole 406 is designed as a minus pole 410.
  • the cell poles 406 are located on opposite sides of the battery cell 400.
  • the positive pole 408 is located on an end face 412 and the negative pole 410 is located on a rear side 414 or opposite end face of the accumulator cell 400.
  • Between the end faces 412, 414 is the jacket surface 402 arranged.
  • the jacket surface 402 of the rechargeable battery cell 400 comprises two individual cell voltage monitoring areas 420 which are provided for individual cell voltage monitoring. However, it would also be conceivable for the rechargeable battery cell to have only one or more individual cell voltage monitoring areas 420.
  • the two individual cell voltage monitoring areas 420 are arranged at a distance from one another.
  • the battery cells 400 are connected to the measuring contacts 840 of the battery.
  • kupacks 100 connected.
  • the measuring contacts 840, formed as contact tongues 842, of the flexible printed circuit board 812 rest on the lateral surface 402 in the individual cell voltage monitoring area 820.
  • the individual cell voltage monitoring areas 820 extend in a closed ring shape around the lateral surface 402.
  • the jacket surface 402 consists of a plastic.
  • the jacket surface 402 consists essentially entirely of an electrically conductive plastic that is connected to the negative pole 410 of the battery cell 400. Since the entire outer surface 402 is made of plastic, the outer surface 402 is designed as a single cell voltage monitoring area 420 and can be connected to a measuring contact 840 of the battery pack 100 or the battery pack electronics 800 in any position.
  • the jacket surface 402 of the battery pack 100 it would also be conceivable for the jacket surface 402 of the battery pack 100 to consist of two different plastics, the plastic having a higher electrical conductivity in the individual cell voltage monitoring area 420.
  • the measuring device comprises the jacket surface 402 or the individual cell voltage monitoring areas 420 of the battery cell.
  • the shape, shape and material of the measuring contacts 840 is chosen such that when the battery cell is in contact with the jacket surface 402, the contact resistance between the measuring contact 840 and the jacket surface 402 is in a range between 100 ohms and 100,000 ohms.
  • the battery pack electronics 800 can advantageously determine an individual cell voltage.
  • the rechargeable battery cell 400 has a housing 422 which consists of a metal and is embodied, for example, as a tin can made of nickel-coated steel.
  • the jacket surface 402 of the battery pack 100 is formed by a shrink tube 424 made of plastic, which completely covers the housing 422 of the battery pack 100 laterally by the shrink tube 424.
  • the outer surface of the housing 422 is essentially completely covered by the shrink tube 424.
  • the housing 422 of the battery pack 100 or the battery pack 100 is partially covered by the shrink tube 424.
  • the Housing 422 of the battery cell 400 is painted and the paint forms the jacket surface 402.
  • the choice of material for the shrink tubing 424 can ensure that the shrink tubing 424 or the jacket surface 402 of the battery pack 100 in the individual cell voltage monitoring area 420 is suitable for monitoring individual cell voltages.
  • the shrink tube 424 consists, for example, of a pure, intrinsically conductive plastic in the form of polypyrrole. Since the negative pole 410 is connected to the housing 422 of the battery pack 100, the shrink tubing 424, which rests against the housing 422, is also electrically connected to the negative pole 410.
  • a first insulation element 426 and a second insulation element 428 are arranged between the housing 422 of the rechargeable battery cell 400 and the positive pole 408.
  • the first insulation element 426 and the second insulation element 428 are in direct contact with the housing 422 of the battery cell 400.
  • the first insulation element 426 and the second insulation element 428 are preferably arranged on different sides of the housing 422 of the rechargeable battery cell 400.
  • the second insulation element 428 is formed as an annular insulation disk 430 and is arranged between the shrink tube 424 and the housing 422 of the battery cell 400.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

L'invention concerne un élément de batterie rechargeable destiné à un bloc-batterie rechargeable et qui comporte une surface latérale, un côté d'extrémité et un côté arrière, la surface latérale comportant une région de surveillance de tension d'élément individuel, la région de surveillance de tension d'élément individuel étant électriquement connectée à un pôle d'élément de l'élément de batterie rechargeable, de sorte qu'une tension de l'élément de batterie rechargeable peut être mesurée au niveau de la région de surveillance de tension d'élément individuel de la surface latérale à des fins de surveillance de l'élément individuel. Selon l'invention, la région de surveillance de tension d'élément individuel est constituée d'une matière plastique ou d'une peinture.
PCT/EP2020/084588 2020-01-17 2020-12-04 Élément de batterie rechargeable et bloc-batterie rechargeable comportant un élément de batterie rechargeable WO2021144064A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202080093388.8A CN114946076A (zh) 2020-01-17 2020-12-04 蓄电池单体和具有蓄电池单体的蓄电池组

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020200535.4A DE102020200535A1 (de) 2020-01-17 2020-01-17 Akkuzelle und Akkupack mit einer Akkuzelle
DE102020200535.4 2020-01-17

Publications (1)

Publication Number Publication Date
WO2021144064A1 true WO2021144064A1 (fr) 2021-07-22

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Application Number Title Priority Date Filing Date
PCT/EP2020/084588 WO2021144064A1 (fr) 2020-01-17 2020-12-04 Élément de batterie rechargeable et bloc-batterie rechargeable comportant un élément de batterie rechargeable

Country Status (3)

Country Link
CN (1) CN114946076A (fr)
DE (1) DE102020200535A1 (fr)
WO (1) WO2021144064A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016203422A1 (de) * 2015-03-06 2016-09-08 Robert Bosch Gmbh Akkupack für eine Handwerkzeugmaschine
DE102016203427A1 (de) 2016-03-02 2017-09-07 Robert Bosch Gmbh Akkupack für eine Handwerkzeugmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016203422A1 (de) * 2015-03-06 2016-09-08 Robert Bosch Gmbh Akkupack für eine Handwerkzeugmaschine
DE102016203427A1 (de) 2016-03-02 2017-09-07 Robert Bosch Gmbh Akkupack für eine Handwerkzeugmaschine

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